/* roulang page: index */
:root {
            --bg-primary: #0d0618;
            --bg-secondary: #140a24;
            --bg-card: #1e1433;
            --bg-card-hover: #261a40;
            --neon-green: #3eff8b;
            --neon-green-dark: #2bcc6d;
            --neon-green-glow: rgba(62, 255, 139, 0.35);
            --electric-purple: #b44dff;
            --electric-purple-glow: rgba(180, 77, 255, 0.3);
            --amber-orange: #ffb347;
            --amber-orange-glow: rgba(255, 179, 71, 0.25);
            --text-body: #e6e3f0;
            --text-heading: #ffffff;
            --text-muted: #8f8aa8;
            --text-dark: #0a0a12;
            --border-dark: rgba(180, 77, 255, 0.18);
            --border-green: rgba(62, 255, 139, 0.5);
            --border-purple: rgba(180, 77, 255, 0.5);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 24px;
            --shadow-default: 0 8px 24px rgba(0, 0, 0, 0.35);
            --shadow-glow-green: 0 4px 18px rgba(62, 255, 139, 0.25);
            --shadow-glow-purple: 0 4px 18px rgba(180, 77, 255, 0.22);
            --shadow-hover: 0 16px 40px rgba(0, 0, 0, 0.5), 0 4px 18px rgba(62, 255, 139, 0.2);
            --font-mono: 'Consolas', 'Courier New', 'SF Mono', 'Menlo', monospace;
            --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --spacing-xs: 8px;
            --spacing-sm: 16px;
            --spacing-md: 24px;
            --spacing-lg: 40px;
            --spacing-xl: 64px;
            --spacing-2xl: 96px;
            --spacing-3xl: 120px;
            --container-max: 1200px;
            --header-height: 72px;
            --transition-fast: 0.2s ease;
            --transition-base: 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.8;
            color: var(--text-body);
            background-color: var(--bg-primary);
            background-image:
                radial-gradient(ellipse at 20% 10%, rgba(180, 77, 255, 0.08) 0%, transparent 55%),
                radial-gradient(ellipse at 80% 30%, rgba(62, 255, 139, 0.04) 0%, transparent 50%),
                radial-gradient(ellipse at 50% 80%, rgba(180, 77, 255, 0.05) 0%, transparent 45%);
            background-attachment: fixed;
            min-height: 100vh;
            overflow-x: hidden;
        }

        a {
            color: var(--neon-green);
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        a:hover {
            color: var(--neon-green-dark);
            text-decoration: none;
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible {
            outline: 2px solid #ffffff;
            outline-offset: 2px;
            border-radius: 2px;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        ul,
        ol {
            list-style: none;
        }

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            color: inherit;
        }

        button {
            cursor: pointer;
            background: none;
            border: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-family: var(--font-sans);
            font-weight: 700;
            color: var(--text-heading);
            line-height: 1.3;
            letter-spacing: -0.01em;
        }

        h1 {
            font-size: clamp(2.5rem, 5vw, 3.5rem);
        }

        h2 {
            font-size: clamp(1.8rem, 3.5vw, 2.4rem);
        }

        h3 {
            font-size: clamp(1.2rem, 2.2vw, 1.5rem);
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 var(--spacing-md);
            width: 100%;
        }

        /* ============ Header / Nav ============ */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-height);
            background: rgba(13, 6, 24, 0.82);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(180, 77, 255, 0.15);
            transition: background var(--transition-base), box-shadow var(--transition-base), height var(--transition-base);
        }

        .site-header.scrolled {
            background: rgba(13, 6, 24, 0.95);
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.45);
            border-bottom-color: rgba(62, 255, 139, 0.25);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-height);
            gap: var(--spacing-md);
        }

        .logo-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            text-decoration: none;
            color: var(--text-heading);
        }

        .logo-icon {
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--neon-green), var(--electric-purple));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 900;
            color: var(--text-dark);
            font-family: var(--font-mono);
            box-shadow: 0 0 16px rgba(62, 255, 139, 0.35);
            letter-spacing: -0.02em;
        }

        .logo-text {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--text-heading);
            letter-spacing: 0.02em;
            white-space: nowrap;
        }

        .logo-text span {
            color: var(--neon-green);
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .main-nav a {
            color: var(--text-muted);
            padding: 8px 16px;
            font-size: 0.92rem;
            font-weight: 500;
            border-radius: var(--radius-sm);
            transition: color var(--transition-fast), background var(--transition-fast), box-shadow var(--transition-fast);
            white-space: nowrap;
        }

        .main-nav a:hover {
            color: var(--text-heading);
            background: rgba(62, 255, 139, 0.08);
        }

        .main-nav a.active {
            color: var(--neon-green);
            background: rgba(62, 255, 139, 0.1);
            box-shadow: inset 0 0 0 1px rgba(62, 255, 139, 0.25);
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 10px 22px;
            font-size: 0.92rem;
            font-weight: 600;
            border-radius: var(--radius-sm);
            cursor: pointer;
            transition: all var(--transition-base);
            white-space: nowrap;
            letter-spacing: 0.02em;
            text-decoration: none;
        }

        .btn-primary {
            background: var(--neon-green);
            color: var(--text-dark);
            border: 1px solid var(--neon-green);
            box-shadow: 0 0 18px rgba(62, 255, 139, 0.3);
        }

        .btn-primary:hover {
            background: #4dff97;
            color: var(--text-dark);
            box-shadow: 0 0 28px rgba(62, 255, 139, 0.5);
            transform: translateY(-1px);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 0 12px rgba(62, 255, 139, 0.25);
        }

        .btn-secondary {
            background: transparent;
            color: var(--electric-purple);
            border: 1.5px solid var(--electric-purple);
            box-shadow: 0 0 12px rgba(180, 77, 255, 0.15);
        }

        .btn-secondary:hover {
            background: rgba(180, 77, 255, 0.15);
            color: #c87dff;
            box-shadow: 0 0 22px rgba(180, 77, 255, 0.3);
            transform: translateY(-1px);
        }

        .btn-secondary:active {
            transform: translateY(0);
            box-shadow: 0 0 10px rgba(180, 77, 255, 0.15);
        }

        .btn-lg {
            padding: 14px 32px;
            font-size: 1rem;
            border-radius: var(--radius-md);
        }

        .btn-sm {
            padding: 7px 16px;
            font-size: 0.82rem;
            border-radius: 6px;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            width: 36px;
            height: 36px;
            align-items: center;
            justify-content: center;
            border-radius: 6px;
            background: rgba(180, 77, 255, 0.1);
            border: 1px solid rgba(180, 77, 255, 0.25);
            cursor: pointer;
            transition: background var(--transition-fast);
        }

        .nav-toggle:hover {
            background: rgba(180, 77, 255, 0.2);
        }

        .nav-toggle span {
            display: block;
            width: 20px;
            height: 2px;
            background: var(--text-heading);
            border-radius: 2px;
            transition: transform var(--transition-base), opacity var(--transition-base);
        }

        .nav-toggle.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .nav-toggle.open span:nth-child(2) {
            opacity: 0;
        }

        .nav-toggle.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: var(--header-height);
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(13, 6, 24, 0.97);
            backdrop-filter: blur(30px);
            -webkit-backdrop-filter: blur(30px);
            z-index: 999;
            padding: var(--spacing-md);
            flex-direction: column;
            gap: var(--spacing-sm);
            overflow-y: auto;
        }

        .mobile-menu.open {
            display: flex;
        }

        .mobile-menu a {
            color: var(--text-body);
            font-size: 1.05rem;
            padding: 14px 16px;
            border-radius: var(--radius-sm);
            border-bottom: 1px solid rgba(180, 77, 255, 0.1);
            transition: background var(--transition-fast), color var(--transition-fast);
        }

        .mobile-menu a:hover,
        .mobile-menu a.active {
            color: var(--neon-green);
            background: rgba(62, 255, 139, 0.08);
        }

        .mobile-menu .mobile-actions {
            display: flex;
            flex-direction: column;
            gap: 12px;
            margin-top: var(--spacing-md);
        }

        /* ============ Hero ============ */
        .hero {
            min-height: 88vh;
            display: flex;
            align-items: center;
            padding: calc(var(--header-height) + var(--spacing-2xl)) 0 var(--spacing-2xl);
            position: relative;
            overflow: hidden;
            background-image:
                linear-gradient(rgba(13, 6, 24, 0.75), rgba(13, 6, 24, 0.88)),
                url('/assets/images/2b4b3c1a0c20be69.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            border-bottom: 1px solid rgba(62, 255, 139, 0.12);
        }

        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background:
                repeating-linear-gradient(0deg, transparent, transparent 3px, rgba(62, 255, 139, 0.02) 3px, rgba(62, 255, 139, 0.02) 4px),
                linear-gradient(90deg, rgba(180, 77, 255, 0.06) 1px, transparent 1px),
                linear-gradient(0deg, rgba(180, 77, 255, 0.06) 1px, transparent 1px);
            background-size: 100% 4px, 40px 40px, 40px 40px;
            pointer-events: none;
            animation: scanline-move 8s linear infinite;
        }

        @keyframes scanline-move {
            0% {
                background-position: 0 0, 0 0, 0 0;
            }
            100% {
                background-position: 0 80px, 40px 40px, 0 40px;
            }
        }

        .hero-inner {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--spacing-xl);
            align-items: center;
        }

        .hero-content {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-md);
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            align-self: flex-start;
            background: rgba(62, 255, 139, 0.1);
            border: 1px solid rgba(62, 255, 139, 0.3);
            color: var(--neon-green);
            padding: 6px 14px;
            font-size: 0.82rem;
            font-weight: 600;
            border-radius: 20px;
            letter-spacing: 0.04em;
            box-shadow: 0 0 12px rgba(62, 255, 139, 0.15);
        }

        .hero-title {
            font-size: clamp(2.4rem, 4.8vw, 3.4rem);
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.02em;
            color: #ffffff;
        }

        .hero-title .highlight {
            color: var(--neon-green);
            text-shadow: 0 0 20px rgba(62, 255, 139, 0.4);
        }

        .hero-subtitle {
            font-size: 1.08rem;
            line-height: 1.9;
            color: var(--text-body);
            max-width: 560px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-top: 4px;
        }

        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
            margin-top: var(--spacing-sm);
        }

        .hero-stat {
            display: flex;
            flex-direction: column;
            gap: 2px;
        }

        .hero-stat-value {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--neon-green);
            font-family: var(--font-mono);
            text-shadow: 0 0 12px rgba(62, 255, 139, 0.3);
        }

        .hero-stat-label {
            font-size: 0.8rem;
            color: var(--text-muted);
            letter-spacing: 0.03em;
        }

        .hero-visual {
            position: relative;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .hero-visual-frame {
            width: 100%;
            max-width: 520px;
            aspect-ratio: 16 / 10;
            border-radius: var(--radius-lg);
            background: var(--bg-card);
            border: 1px solid var(--border-purple);
            box-shadow: var(--shadow-default), 0 0 40px rgba(62, 255, 139, 0.08);
            overflow: hidden;
            position: relative;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: var(--spacing-sm);
        }

        .hero-visual-frame::before {
            content: '';
            position: absolute;
            inset: 0;
            border-radius: var(--radius-lg);
            border: 1px solid rgba(62, 255, 139, 0.2);
            pointer-events: none;
            z-index: 3;
        }

        .hero-visual-frame img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: var(--radius-md);
            opacity: 0.9;
            filter: saturate(1.1) contrast(1.05);
        }

        .hero-visual-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(13, 6, 24, 0.1) 0%, rgba(13, 6, 24, 0.55) 100%);
            display: flex;
            align-items: flex-end;
            padding: var(--spacing-md);
            z-index: 2;
            border-radius: var(--radius-lg);
        }

        .hero-visual-status {
            display: flex;
            gap: 10px;
            font-size: 0.75rem;
            color: var(--text-muted);
            font-family: var(--font-mono);
        }

        .hero-visual-status .dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--neon-green);
            box-shadow: 0 0 8px rgba(62, 255, 139, 0.6);
            animation: pulse-dot 1.8s ease-in-out infinite;
            display: inline-block;
        }

        @keyframes pulse-dot {
            0%,
            100% {
                opacity: 1;
                transform: scale(1);
            }
            50% {
                opacity: 0.5;
                transform: scale(0.8);
            }
        }

        /* ============ Sections ============ */
        .section {
            padding: var(--spacing-2xl) 0;
            position: relative;
        }

        .section-alt {
            background: rgba(20, 10, 36, 0.55);
            border-top: 1px solid rgba(180, 77, 255, 0.08);
            border-bottom: 1px solid rgba(180, 77, 255, 0.08);
        }

        .section-dark {
            background: var(--bg-secondary);
        }

        .section-header {
            margin-bottom: var(--spacing-lg);
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
            max-width: 640px;
        }

        .section-header.center {
            max-width: 720px;
            margin-left: auto;
            margin-right: auto;
            text-align: center;
            align-items: center;
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.78rem;
            font-weight: 600;
            color: var(--electric-purple);
            letter-spacing: 0.08em;
            text-transform: uppercase;
            font-family: var(--font-mono);
        }

        .section-label::before {
            content: '';
            width: 24px;
            height: 2px;
            background: var(--electric-purple);
            border-radius: 2px;
        }

        .section-header.center .section-label::after {
            content: '';
            width: 24px;
            height: 2px;
            background: var(--electric-purple);
            border-radius: 2px;
        }

        .section-title {
            font-size: clamp(1.7rem, 3vw, 2.3rem);
            font-weight: 800;
            color: #ffffff;
            letter-spacing: -0.015em;
        }

        .section-desc {
            font-size: 0.98rem;
            line-height: 1.85;
            color: var(--text-muted);
        }

        /* Pain points */
        .pain-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-md);
        }

        .pain-card {
            background: var(--bg-card);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-md);
            padding: var(--spacing-md);
            transition: all var(--transition-base);
            position: relative;
            overflow: hidden;
        }

        .pain-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--amber-orange), transparent);
            opacity: 0.7;
        }

        .pain-card:hover {
            border-color: var(--border-purple);
            background: var(--bg-card-hover);
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }

        .pain-icon {
            width: 48px;
            height: 48px;
            border-radius: var(--radius-sm);
            background: rgba(255, 179, 71, 0.12);
            border: 1px solid rgba(255, 179, 71, 0.3);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            margin-bottom: var(--spacing-sm);
            color: var(--amber-orange);
        }

        .pain-card h3 {
            font-size: 1.1rem;
            margin-bottom: 8px;
            color: #ffffff;
        }

        .pain-card p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* Solution */
        .solution-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: var(--spacing-md);
        }

        .solution-card {
            background: var(--bg-card);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-md);
            padding: var(--spacing-lg);
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
            position: relative;
        }

        .solution-card:hover {
            border-color: var(--border-green);
            box-shadow: var(--shadow-glow-green);
            transform: translateY(-3px);
            background: var(--bg-card-hover);
        }

        .solution-card .num {
            font-family: var(--font-mono);
            font-size: 0.75rem;
            color: var(--neon-green);
            letter-spacing: 0.06em;
        }

        .solution-card h3 {
            font-size: 1.2rem;
            color: #ffffff;
        }

        .solution-card p {
            font-size: 0.92rem;
            color: var(--text-muted);
            line-height: 1.75;
        }

        /* Capability matrix */
        .cap-matrix {
            display: grid;
            grid-template-columns: repeat(6, 1fr);
            grid-template-rows: auto auto;
            gap: var(--spacing-sm);
        }

        .cap-item {
            background: var(--bg-card);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-md);
            padding: var(--spacing-sm) var(--spacing-md);
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
            gap: 4px;
            min-height: 110px;
            justify-content: center;
        }

        .cap-item:hover {
            border-color: var(--border-green);
            box-shadow: var(--shadow-glow-green);
            transform: translateY(-2px);
            background: var(--bg-card-hover);
        }

        .cap-item.wide {
            grid-column: span 2;
        }

        .cap-item.extra-wide {
            grid-column: span 3;
        }

        .cap-icon {
            font-size: 1.6rem;
            color: var(--neon-green);
            margin-bottom: 4px;
        }

        .cap-item h3 {
            font-size: 0.95rem;
            color: #ffffff;
            font-weight: 600;
        }

        .cap-item p {
            font-size: 0.8rem;
            color: var(--text-muted);
            line-height: 1.5;
        }

        /* Steps */
        .steps-timeline {
            display: flex;
            flex-direction: column;
            gap: 0;
            position: relative;
            padding-left: 36px;
        }

        .steps-timeline::before {
            content: '';
            position: absolute;
            left: 12px;
            top: 8px;
            bottom: 8px;
            width: 2px;
            background: linear-gradient(180deg, var(--neon-green), var(--electric-purple));
            border-radius: 2px;
        }

        .step-item {
            position: relative;
            padding: var(--spacing-sm) 0 var(--spacing-sm) var(--spacing-md);
            transition: all var(--transition-base);
        }

        .step-item::before {
            content: '';
            position: absolute;
            left: -28px;
            top: 28px;
            width: 14px;
            height: 14px;
            border-radius: 50%;
            background: var(--bg-primary);
            border: 3px solid var(--neon-green);
            box-shadow: 0 0 10px rgba(62, 255, 139, 0.4);
            transition: all var(--transition-base);
        }

        .step-item:hover::before {
            box-shadow: 0 0 18px rgba(62, 255, 139, 0.7);
            transform: scale(1.15);
        }

        .step-num {
            font-family: var(--font-mono);
            font-size: 0.8rem;
            color: var(--neon-green);
            letter-spacing: 0.06em;
        }

        .step-item h3 {
            font-size: 1.1rem;
            color: #ffffff;
            margin: 6px 0 4px;
        }

        .step-item p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* Performance data */
        .perf-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--spacing-md);
        }

        .perf-card {
            background: var(--bg-card);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-md);
            padding: var(--spacing-md);
            text-align: center;
            transition: all var(--transition-base);
            position: relative;
            overflow: hidden;
        }

        .perf-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--neon-green), var(--electric-purple));
            opacity: 0.8;
        }

        .perf-card:hover {
            border-color: var(--border-green);
            box-shadow: var(--shadow-glow-green);
            transform: translateY(-3px);
            background: var(--bg-card-hover);
        }

        .perf-value {
            font-size: 2.2rem;
            font-weight: 800;
            font-family: var(--font-mono);
            color: var(--neon-green);
            text-shadow: 0 0 16px rgba(62, 255, 139, 0.35);
            line-height: 1.2;
        }

        .perf-unit {
            font-size: 0.85rem;
            color: var(--text-muted);
            font-family: var(--font-mono);
        }

        .perf-label {
            font-size: 0.88rem;
            color: var(--text-body);
            margin-top: 6px;
            font-weight: 500;
        }

        .perf-desc {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-top: 4px;
            line-height: 1.5;
        }

        /* Testimonials */
        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-md);
        }

        .testimonial-card {
            background: var(--bg-card);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-md);
            padding: var(--spacing-lg);
            transition: all var(--transition-base);
            position: relative;
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
        }

        .testimonial-card:hover {
            border-color: var(--border-purple);
            box-shadow: var(--shadow-glow-purple);
            transform: translateY(-3px);
            background: var(--bg-card-hover);
        }

        .testimonial-quote {
            font-size: 0.95rem;
            color: var(--text-body);
            line-height: 1.8;
            font-style: normal;
            position: relative;
            padding-left: 16px;
            border-left: 3px solid var(--neon-green);
        }

        .testimonial-author {
            font-size: 0.82rem;
            color: var(--text-muted);
            font-family: var(--font-mono);
            letter-spacing: 0.02em;
        }

        .testimonial-tag {
            display: inline-block;
            align-self: flex-start;
            font-size: 0.7rem;
            background: rgba(180, 77, 255, 0.15);
            border: 1px solid rgba(180, 77, 255, 0.3);
            color: var(--electric-purple);
            padding: 3px 10px;
            border-radius: 12px;
            letter-spacing: 0.04em;
        }

        /* Audience */
        .audience-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--spacing-sm);
        }

        .audience-card {
            background: var(--bg-card);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-md);
            padding: var(--spacing-md);
            transition: all var(--transition-base);
            text-align: center;
            min-height: 140px;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 6px;
        }

        .audience-card:hover {
            border-color: var(--border-green);
            box-shadow: var(--shadow-glow-green);
            background: var(--bg-card-hover);
            transform: translateY(-2px);
        }

        .audience-icon {
            font-size: 2rem;
            color: var(--neon-green);
        }

        .audience-card h3 {
            font-size: 0.95rem;
            color: #ffffff;
            font-weight: 600;
        }

        .audience-card p {
            font-size: 0.78rem;
            color: var(--text-muted);
            line-height: 1.5;
        }

        /* News */
        .news-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: var(--spacing-md);
        }

        .news-card {
            display: flex;
            gap: var(--spacing-sm);
            background: var(--bg-card);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-md);
            padding: var(--spacing-sm);
            transition: all var(--transition-base);
            align-items: center;
        }

        .news-card:hover {
            border-color: var(--border-green);
            box-shadow: var(--shadow-glow-green);
            transform: translateY(-2px);
            background: var(--bg-card-hover);
        }

        .news-thumb {
            width: 90px;
            height: 70px;
            border-radius: var(--radius-sm);
            overflow: hidden;
            flex-shrink: 0;
            background: var(--bg-secondary);
            border: 1px solid var(--border-dark);
        }

        .news-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .news-info {
            display: flex;
            flex-direction: column;
            gap: 4px;
            flex: 1;
        }

        .news-tag {
            align-self: flex-start;
            font-size: 0.68rem;
            background: rgba(62, 255, 139, 0.1);
            border: 1px solid rgba(62, 255, 139, 0.25);
            color: var(--neon-green);
            padding: 2px 8px;
            border-radius: 10px;
            letter-spacing: 0.04em;
        }

        .news-card h3 {
            font-size: 0.92rem;
            color: #ffffff;
            font-weight: 600;
            line-height: 1.4;
        }

        .news-date {
            font-size: 0.75rem;
            color: var(--text-muted);
            font-family: var(--font-mono);
        }

        /* Data metrics */
        .metrics-bar-list {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-md);
        }

        .metric-row {
            display: grid;
            grid-template-columns: 120px 1fr 80px;
            gap: var(--spacing-sm);
            align-items: center;
        }

        .metric-label {
            font-size: 0.85rem;
            color: var(--text-body);
            font-weight: 500;
        }

        .metric-track {
            height: 10px;
            background: rgba(180, 77, 255, 0.1);
            border-radius: 5px;
            overflow: hidden;
            border: 1px solid rgba(180, 77, 255, 0.15);
        }

        .metric-fill {
            height: 100%;
            border-radius: 5px;
            background: linear-gradient(90deg, var(--neon-green), var(--electric-purple));
            box-shadow: 0 0 10px rgba(62, 255, 139, 0.35);
            transition: width 1.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            width: 0;
        }

        .metric-value {
            font-family: var(--font-mono);
            font-size: 0.9rem;
            color: var(--neon-green);
            text-align: right;
            font-weight: 600;
            white-space: nowrap;
        }

        /* Brand story */
        .brand-story {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--spacing-xl);
            align-items: center;
        }

        .brand-story-text {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
            font-size: 0.95rem;
            line-height: 1.9;
            color: var(--text-body);
        }

        .brand-story-text p {
            margin-bottom: 8px;
        }

        .brand-visual {
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-purple);
            box-shadow: var(--shadow-default), 0 0 30px rgba(180, 77, 255, 0.12);
            aspect-ratio: 4 / 3;
        }

        .brand-visual img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            filter: saturate(1.05) brightness(0.9);
        }

        /* CTA section */
        .cta-section {
            position: relative;
            overflow: hidden;
            background-image:
                linear-gradient(rgba(13, 6, 24, 0.82), rgba(13, 6, 24, 0.9)),
                url('/assets/images/e6f53ce276b94cf6.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            border-top: 1px solid rgba(62, 255, 139, 0.15);
            border-bottom: 1px solid rgba(62, 255, 139, 0.15);
            padding: var(--spacing-3xl) 0;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background:
                repeating-linear-gradient(0deg, transparent, transparent 3px, rgba(62, 255, 139, 0.025) 3px, rgba(62, 255, 139, 0.025) 4px);
            background-size: 100% 4px;
            pointer-events: none;
        }

        .cta-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 680px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: var(--spacing-md);
        }

        .cta-content h2 {
            font-size: clamp(1.8rem, 3vw, 2.4rem);
            color: #ffffff;
        }

        .cta-content p {
            font-size: 0.95rem;
            color: var(--text-muted);
            line-height: 1.8;
        }

        .cta-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            justify-content: center;
        }

        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition-base);
        }

        .faq-item:hover {
            border-color: rgba(62, 255, 139, 0.35);
            box-shadow: 0 2px 12px rgba(62, 255, 139, 0.1);
        }

        .faq-question {
            display: flex;
            gap: 12px;
            padding: var(--spacing-md);
            cursor: pointer;
            align-items: flex-start;
            user-select: none;
            transition: background var(--transition-fast);
        }

        .faq-question:hover {
            background: rgba(62, 255, 139, 0.04);
        }

        .faq-q-mark {
            font-family: var(--font-mono);
            font-weight: 800;
            color: var(--neon-green);
            font-size: 1.1rem;
            line-height: 1.5;
            flex-shrink: 0;
            text-shadow: 0 0 8px rgba(62, 255, 139, 0.5);
        }

        .faq-question-text {
            font-weight: 600;
            color: #ffffff;
            font-size: 0.98rem;
            line-height: 1.6;
            flex: 1;
        }

        .faq-toggle-icon {
            font-family: var(--font-mono);
            color: var(--text-muted);
            font-size: 1.2rem;
            transition: transform var(--transition-base);
            flex-shrink: 0;
            line-height: 1.5;
        }

        .faq-item.open .faq-toggle-icon {
            transform: rotate(45deg);
            color: var(--neon-green);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-base), padding var(--transition-base);
            padding: 0 var(--spacing-md);
            color: var(--text-body);
            font-size: 0.9rem;
            line-height: 1.8;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding-bottom: var(--spacing-md);
        }

        /* Footer */
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid rgba(180, 77, 255, 0.12);
            padding: var(--spacing-xl) 0 var(--spacing-md);
            position: relative;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: var(--spacing-lg);
            margin-bottom: var(--spacing-lg);
        }

        .footer-brand-col {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
        }

        .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.15rem;
            font-weight: 700;
            color: #ffffff;
        }

        .footer-logo .logo-icon {
            width: 32px;
            height: 32px;
            font-size: 16px;
        }

        .footer-brand-desc {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.7;
            max-width: 300px;
        }

        .footer-col h4 {
            font-size: 0.9rem;
            font-weight: 600;
            color: #ffffff;
            margin-bottom: var(--spacing-sm);
            letter-spacing: 0.04em;
        }

        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }

        .footer-col a {
            font-size: 0.85rem;
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }

        .footer-col a:hover {
            color: var(--neon-green);
        }

        .footer-subscribe {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
        }

        .footer-subscribe p {
            font-size: 0.82rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        .footer-input-group {
            display: flex;
            gap: 8px;
        }

        .footer-input {
            flex: 1;
            min-width: 0;
            background: rgba(180, 77, 255, 0.08);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-sm);
            padding: 10px 14px;
            font-size: 0.85rem;
            color: var(--text-heading);
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
        }

        .footer-input:focus {
            border-color: var(--neon-green);
            box-shadow: 0 0 0 3px rgba(62, 255, 139, 0.1);
            outline: none;
        }

        .footer-input::placeholder {
            color: var(--text-muted);
            opacity: 0.7;
        }

        .footer-bottom {
            border-top: 1px solid rgba(180, 77, 255, 0.08);
            padding-top: var(--spacing-md);
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: var(--spacing-sm);
            font-size: 0.78rem;
            color: var(--text-muted);
        }

        .footer-bottom-links {
            display: flex;
            gap: 16px;
            align-items: center;
            flex-wrap: wrap;
        }

        .footer-bottom a {
            color: var(--text-muted);
            font-size: 0.78rem;
            transition: color var(--transition-fast);
        }

        .footer-bottom a:hover {
            color: var(--neon-green);
        }

        /* ============ Responsive ============ */
        @media (max-width: 1023px) {
            .main-nav {
                display: none;
            }

            .header-actions .btn {
                display: none;
            }

            .nav-toggle {
                display: flex;
            }

            .hero-inner {
                grid-template-columns: 1fr;
                gap: var(--spacing-lg);
            }

            .hero {
                min-height: auto;
                padding-top: calc(var(--header-height) + var(--spacing-xl));
            }

            .hero-visual-frame {
                max-width: 100%;
            }

            .hero-stats {
                gap: 16px;
            }

            .pain-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .solution-grid {
                grid-template-columns: 1fr;
            }

            .cap-matrix {
                grid-template-columns: repeat(3, 1fr);
                grid-template-rows: auto;
            }

            .cap-item.wide,
            .cap-item.extra-wide {
                grid-column: span 1;
            }

            .perf-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .testimonial-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .audience-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .news-list {
                grid-template-columns: 1fr;
            }

            .brand-story {
                grid-template-columns: 1fr;
                gap: var(--spacing-md);
            }

            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .section {
                padding: var(--spacing-xl) 0;
            }

            .metric-row {
                grid-template-columns: 90px 1fr 70px;
            }
        }

        @media (max-width: 767px) {
            .container {
                padding: 0 var(--spacing-sm);
            }

            .section {
                padding: 60px 0;
            }

            .section-header {
                margin-bottom: var(--spacing-md);
            }

            .section-title {
                font-size: 1.5rem;
            }

            .pain-grid {
                grid-template-columns: 1fr;
            }

            .cap-matrix {
                grid-template-columns: repeat(2, 1fr);
            }

            .perf-grid {
                grid-template-columns: 1fr 1fr;
                gap: var(--spacing-sm);
            }

            .perf-value {
                font-size: 1.7rem;
            }

            .testimonial-grid {
                grid-template-columns: 1fr;
            }

            .audience-grid {
                grid-template-columns: 1fr 1fr;
                gap: var(--spacing-xs);
            }

            .audience-card {
                min-height: 110px;
                padding: var(--spacing-sm);
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: var(--spacing-md);
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
                justify-content: center;
            }

            .footer-bottom-links {
                justify-content: center;
            }

            .hero-title {
                font-size: 2rem;
            }

            .hero-subtitle {
                font-size: 0.95rem;
            }

            .hero-actions {
                flex-direction: column;
                width: 100%;
            }

            .hero-actions .btn {
                width: 100%;
                justify-content: center;
            }

            .hero-stats {
                flex-wrap: wrap;
                gap: 12px;
            }

            .hero-stat-value {
                font-size: 1.3rem;
            }

            .metric-row {
                grid-template-columns: 70px 1fr 55px;
                gap: 8px;
            }

            .metric-label {
                font-size: 0.75rem;
            }

            .metric-value {
                font-size: 0.78rem;
            }

            .news-thumb {
                width: 65px;
                height: 55px;
            }

            .faq-question-text {
                font-size: 0.88rem;
            }

            .faq-answer {
                font-size: 0.85rem;
            }

            .btn-lg {
                padding: 12px 24px;
                font-size: 0.92rem;
            }
        }

        @media (max-width: 519px) {
            .cap-matrix {
                grid-template-columns: 1fr;
            }

            .audience-grid {
                grid-template-columns: 1fr;
            }

            .perf-grid {
                grid-template-columns: 1fr;
            }

            .hero {
                padding-top: calc(var(--header-height) + var(--spacing-lg));
            }
        }

/* roulang page: category2 */
:root {
            --bg-primary: #0d0618;
            --bg-secondary: #140a24;
            --bg-card: #1e1433;
            --bg-card-hover: #261a40;
            --neon-green: #3eff8b;
            --neon-green-dark: #2bcc6d;
            --neon-green-glow: rgba(62, 255, 139, 0.35);
            --electric-purple: #b44dff;
            --electric-purple-glow: rgba(180, 77, 255, 0.3);
            --amber-orange: #ffb347;
            --amber-orange-glow: rgba(255, 179, 71, 0.25);
            --text-body: #e6e3f0;
            --text-heading: #ffffff;
            --text-muted: #8f8aa8;
            --text-dark: #0a0a12;
            --border-dark: rgba(180, 77, 255, 0.18);
            --border-green: rgba(62, 255, 139, 0.5);
            --border-purple: rgba(180, 77, 255, 0.5);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 24px;
            --shadow-default: 0 8px 24px rgba(0, 0, 0, 0.35);
            --shadow-glow-green: 0 4px 18px rgba(62, 255, 139, 0.25);
            --shadow-glow-purple: 0 4px 18px rgba(180, 77, 255, 0.22);
            --shadow-hover: 0 16px 40px rgba(0, 0, 0, 0.5), 0 4px 18px rgba(62, 255, 139, 0.2);
            --font-mono: 'Consolas', 'Courier New', 'SF Mono', 'Menlo', monospace;
            --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --spacing-xs: 8px;
            --spacing-sm: 16px;
            --spacing-md: 24px;
            --spacing-lg: 40px;
            --spacing-xl: 64px;
            --spacing-2xl: 96px;
            --spacing-3xl: 120px;
            --container-max: 1200px;
            --header-height: 72px;
            --transition-fast: 0.2s ease;
            --transition-base: 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.8;
            color: var(--text-body);
            background-color: var(--bg-primary);
            background-image:
                radial-gradient(ellipse at 20% 10%, rgba(180, 77, 255, 0.08) 0%, transparent 55%),
                radial-gradient(ellipse at 80% 30%, rgba(62, 255, 139, 0.04) 0%, transparent 50%),
                radial-gradient(ellipse at 50% 80%, rgba(180, 77, 255, 0.05) 0%, transparent 45%);
            background-attachment: fixed;
            min-height: 100vh;
            overflow-x: hidden;
        }

        a {
            color: var(--neon-green);
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        a:hover {
            color: var(--neon-green-dark);
            text-decoration: none;
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible {
            outline: 2px solid #ffffff;
            outline-offset: 2px;
            border-radius: 2px;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            color: inherit;
        }

        button {
            cursor: pointer;
            background: none;
            border: none;
        }

        ul,
        ol {
            list-style: none;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 var(--spacing-md);
            width: 100%;
        }

        /* ============ Header / Nav ============ */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-height);
            background: rgba(13, 6, 24, 0.82);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(180, 77, 255, 0.15);
            transition: background var(--transition-base), box-shadow var(--transition-base), height var(--transition-base);
        }

        .site-header.scrolled {
            background: rgba(13, 6, 24, 0.95);
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.45);
            border-bottom-color: rgba(62, 255, 139, 0.25);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-height);
            gap: var(--spacing-md);
        }

        .logo-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            text-decoration: none;
            color: var(--text-heading);
        }

        .logo-icon {
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--neon-green), var(--electric-purple));
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 20px;
            color: var(--text-dark);
            box-shadow: var(--shadow-glow-green);
        }

        .logo-text {
            font-size: 20px;
            font-weight: 700;
            letter-spacing: 0.5px;
            color: var(--text-heading);
        }

        .logo-text span {
            color: var(--neon-green);
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 28px;
            margin: 0 auto;
        }

        .main-nav a {
            color: var(--text-muted);
            font-size: 15px;
            font-weight: 500;
            padding: 8px 4px;
            position: relative;
            transition: color var(--transition-fast);
            white-space: nowrap;
        }

        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 2px;
            background: var(--neon-green);
            border-radius: 2px;
            transform: scaleX(0);
            transform-origin: left;
            transition: transform var(--transition-base);
        }

        .main-nav a:hover {
            color: var(--text-heading);
        }

        .main-nav a:hover::after {
            transform: scaleX(1);
        }

        .main-nav a.active {
            color: var(--neon-green);
        }

        .main-nav a.active::after {
            transform: scaleX(1);
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 15px;
            padding: 10px 20px;
            transition: all var(--transition-base);
            white-space: nowrap;
            letter-spacing: 0.3px;
        }

        .btn-primary {
            background: var(--neon-green);
            color: var(--text-dark);
            border: 1px solid var(--neon-green);
        }

        .btn-primary:hover {
            background: var(--neon-green-dark);
            border-color: var(--neon-green-dark);
            box-shadow: var(--shadow-glow-green);
            transform: translateY(-1px);
            color: var(--text-dark);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: none;
        }

        .btn-secondary {
            background: transparent;
            color: var(--electric-purple);
            border: 1px solid var(--border-purple);
        }

        .btn-secondary:hover {
            background: rgba(180, 77, 255, 0.15);
            border-color: var(--electric-purple);
            box-shadow: var(--shadow-glow-purple);
            transform: translateY(-1px);
            color: var(--electric-purple);
        }

        .btn-secondary:active {
            transform: translateY(0);
            box-shadow: none;
        }

        .btn-sm {
            font-size: 14px;
            padding: 8px 16px;
        }

        .btn-lg {
            font-size: 16px;
            padding: 14px 28px;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-dark);
            background: transparent;
        }

        .nav-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--text-heading);
            border-radius: 2px;
            transition: all var(--transition-base);
        }

        .nav-toggle[aria-expanded="true"] span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }

        .nav-toggle[aria-expanded="true"] span:nth-child(2) {
            opacity: 0;
        }

        .nav-toggle[aria-expanded="true"] span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        /* ============ Breadcrumb ============ */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: var(--spacing-sm);
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }

        .breadcrumb a:hover {
            color: var(--neon-green);
        }

        .breadcrumb .separator {
            color: var(--text-muted);
            opacity: 0.6;
        }

        .breadcrumb .current {
            color: var(--neon-green);
            font-weight: 500;
        }

        /* ============ Page Hero / Category Header ============ */
        .page-hero {
            padding: calc(var(--header-height) + 48px) 0 48px;
            background: var(--bg-secondary);
            border-bottom: 1px solid var(--border-dark);
            position: relative;
            overflow: hidden;
        }

        .page-hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--neon-green), var(--electric-purple), var(--neon-green));
            opacity: 0.7;
        }

        .page-hero::after {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(180, 77, 255, 0.15) 0%, transparent 70%);
            pointer-events: none;
        }

        .page-hero-content {
            position: relative;
            z-index: 1;
        }

        .page-hero h1 {
            font-size: 2.8rem;
            font-weight: 700;
            color: var(--text-heading);
            line-height: 1.3;
            margin-bottom: var(--spacing-sm);
            letter-spacing: 0.5px;
        }

        .page-hero h1 .highlight {
            color: var(--neon-green);
        }

        .page-hero .hero-subtitle {
            font-size: 18px;
            color: var(--text-muted);
            max-width: 720px;
            line-height: 1.9;
            margin-bottom: var(--spacing-md);
        }

        .page-hero .hero-meta {
            display: flex;
            align-items: center;
            gap: var(--spacing-md);
            font-size: 14px;
            color: var(--text-muted);
            flex-wrap: wrap;
        }

        .page-hero .hero-meta .meta-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(62, 255, 139, 0.1);
            border: 1px solid rgba(62, 255, 139, 0.2);
            border-radius: 20px;
            padding: 2px 12px;
            font-size: 13px;
            color: var(--neon-green);
        }

        .page-hero .hero-meta .meta-tag.purple {
            background: rgba(180, 77, 255, 0.1);
            border-color: rgba(180, 77, 255, 0.2);
            color: var(--electric-purple);
        }

        /* ============ Section Common ============ */
        .section {
            padding: var(--spacing-2xl) 0;
        }

        .section-alt {
            background: var(--bg-secondary);
        }

        .section-header {
            margin-bottom: var(--spacing-lg);
        }

        .section-header .section-label {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 1px;
            text-transform: uppercase;
            color: var(--neon-green);
            margin-bottom: 6px;
        }

        .section-header h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-heading);
            line-height: 1.35;
            margin-bottom: var(--spacing-xs);
        }

        .section-header h2 .highlight {
            color: var(--neon-green);
        }

        .section-header .section-desc {
            color: var(--text-muted);
            font-size: 16px;
            max-width: 640px;
            line-height: 1.9;
        }

        /* ============ Guide List Cards ============ */
        .guide-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: var(--spacing-md);
        }

        .guide-card {
            background: var(--bg-card);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
        }

        .guide-card:hover {
            border-color: var(--border-green);
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }

        .guide-card .card-cover {
            width: 100%;
            height: 200px;
            overflow: hidden;
            position: relative;
            background: var(--bg-secondary);
        }

        .guide-card .card-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-base);
        }

        .guide-card:hover .card-cover img {
            transform: scale(1.04);
        }

        .guide-card .card-cover::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 60px;
            background: linear-gradient(to top, var(--bg-card), transparent);
        }

        .guide-card .card-body {
            padding: var(--spacing-md);
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .guide-card .card-tags {
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 10px;
            flex-wrap: wrap;
        }

        .badge {
            display: inline-block;
            font-size: 12px;
            font-weight: 500;
            padding: 2px 10px;
            border-radius: 20px;
            letter-spacing: 0.3px;
        }

        .badge-green {
            background: rgba(62, 255, 139, 0.12);
            color: var(--neon-green);
            border: 1px solid rgba(62, 255, 139, 0.2);
        }

        .badge-amber {
            background: rgba(255, 179, 71, 0.12);
            color: var(--amber-orange);
            border: 1px solid rgba(255, 179, 71, 0.2);
        }

        .badge-purple {
            background: rgba(180, 77, 255, 0.12);
            color: var(--electric-purple);
            border: 1px solid rgba(180, 77, 255, 0.2);
        }

        .guide-card h3 {
            font-size: 1.25rem;
            font-weight: 600;
            color: var(--text-heading);
            line-height: 1.5;
            margin-bottom: 8px;
        }

        .guide-card h3 a {
            color: var(--text-heading);
            transition: color var(--transition-fast);
        }

        .guide-card h3 a:hover {
            color: var(--neon-green);
        }

        .guide-card .card-excerpt {
            color: var(--text-muted);
            font-size: 14px;
            line-height: 1.8;
            margin-bottom: var(--spacing-sm);
            flex: 1;
        }

        .guide-card .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 13px;
            color: var(--text-muted);
            padding-top: var(--spacing-xs);
            border-top: 1px solid var(--border-dark);
        }

        .guide-card .card-meta .meta-date {
            font-family: var(--font-mono);
            font-size: 12px;
        }

        .guide-card .card-meta .meta-read {
            color: var(--neon-green);
            font-size: 13px;
            font-weight: 500;
        }

        /* ============ Hot Guides ============ */
        .hot-guides-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-md);
        }

        .hot-guide-card {
            background: var(--bg-card);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition-base);
            position: relative;
        }

        .hot-guide-card:hover {
            border-color: var(--electric-purple);
            box-shadow: var(--shadow-glow-purple);
            transform: translateY(-4px);
        }

        .hot-guide-card .hot-rank {
            position: absolute;
            top: 14px;
            left: 14px;
            z-index: 2;
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: var(--neon-green);
            font-weight: 700;
            font-size: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-dark);
            box-shadow: var(--shadow-glow-green);
        }

        .hot-guide-card .card-cover {
            width: 100%;
            height: 140px;
            overflow: hidden;
            background: var(--bg-secondary);
            position: relative;
        }

        .hot-guide-card .card-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-base);
        }

        .hot-guide-card:hover .card-cover img {
            transform: scale(1.05);
        }

        .hot-guide-card .card-body {
            padding: var(--spacing-sm) var(--spacing-md) var(--spacing-md);
        }

        .hot-guide-card h3 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-heading);
            line-height: 1.5;
            margin-bottom: 6px;
        }

        .hot-guide-card .card-excerpt {
            color: var(--text-muted);
            font-size: 13px;
            line-height: 1.7;
        }

        /* ============ Tag Navigation ============ */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }

        .tag-pill {
            display: inline-flex;
            align-items: center;
            padding: 8px 18px;
            border-radius: 24px;
            background: var(--bg-card);
            border: 1px solid var(--border-dark);
            color: var(--text-body);
            font-size: 14px;
            transition: all var(--transition-base);
            cursor: default;
            letter-spacing: 0.3px;
        }

        .tag-pill:hover {
            border-color: var(--border-green);
            background: var(--bg-card-hover);
            box-shadow: var(--shadow-glow-green);
            color: var(--neon-green);
            transform: translateY(-2px);
        }

        /* ============ Scene Entry ============ */
        .scene-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--spacing-md);
        }

        .scene-card {
            background: var(--bg-card);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-lg);
            padding: var(--spacing-md);
            text-align: center;
            transition: all var(--transition-base);
        }

        .scene-card:hover {
            border-color: var(--border-purple);
            box-shadow: var(--shadow-glow-purple);
            transform: translateY(-4px);
        }

        .scene-card .scene-icon {
            width: 52px;
            height: 52px;
            border-radius: var(--radius-md);
            margin: 0 auto 12px;
            background: linear-gradient(135deg, rgba(62, 255, 139, 0.15), rgba(180, 77, 255, 0.15));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            color: var(--neon-green);
            border: 1px solid var(--border-green);
        }

        .scene-card h3 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-heading);
            margin-bottom: 6px;
        }

        .scene-card p {
            color: var(--text-muted);
            font-size: 13px;
            line-height: 1.7;
        }

        /* ============ Tips Section ============ */
        .tips-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--spacing-lg);
            align-items: start;
        }

        .tips-card {
            background: var(--bg-card);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-lg);
            padding: var(--spacing-md);
            transition: all var(--transition-base);
        }

        .tips-card:hover {
            border-color: var(--border-green);
            box-shadow: var(--shadow-glow-green);
        }

        .tips-card h3 {
            font-size: 1.15rem;
            font-weight: 600;
            color: var(--neon-green);
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .tips-card ul {
            list-style: none;
        }

        .tips-card ul li {
            color: var(--text-body);
            font-size: 14px;
            line-height: 1.8;
            padding: 6px 0;
            border-bottom: 1px solid rgba(180, 77, 255, 0.08);
            position: relative;
            padding-left: 20px;
        }

        .tips-card ul li:last-child {
            border-bottom: none;
        }

        .tips-card ul li::before {
            content: '▸';
            position: absolute;
            left: 0;
            color: var(--neon-green);
            font-size: 14px;
        }

        /* ============ CTA Section ============ */
        .page-cta {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-dark);
            border-bottom: 1px solid var(--border-dark);
            padding: var(--spacing-xl) 0;
            position: relative;
            overflow: hidden;
        }

        .page-cta::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 2px;
            background: linear-gradient(90deg, transparent, var(--neon-green), var(--electric-purple), transparent);
        }

        .cta-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: var(--spacing-md);
            flex-wrap: wrap;
        }

        .cta-content h2 {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 6px;
        }

        .cta-content h2 .highlight {
            color: var(--neon-green);
        }

        .cta-content p {
            color: var(--text-muted);
            font-size: 16px;
            max-width: 520px;
        }

        .cta-actions {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }

        /* ============ Footer ============ */
        .site-footer {
            background: #0a0512;
            border-top: 1px solid var(--border-dark);
            padding: var(--spacing-xl) 0 var(--spacing-md);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: var(--spacing-lg);
            margin-bottom: var(--spacing-lg);
        }

        .footer-brand-col {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
        }

        .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .footer-logo .logo-icon {
            width: 36px;
            height: 36px;
            font-size: 18px;
        }

        .footer-logo span {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-heading);
        }

        .footer-brand-desc {
            color: var(--text-muted);
            font-size: 14px;
            line-height: 1.8;
            max-width: 340px;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-heading);
            margin-bottom: var(--spacing-sm);
        }

        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .footer-col ul li a {
            color: var(--text-muted);
            font-size: 14px;
            transition: color var(--transition-fast);
        }

        .footer-col ul li a:hover {
            color: var(--neon-green);
        }

        .footer-subscribe p {
            color: var(--text-muted);
            font-size: 13px;
            line-height: 1.7;
            margin-bottom: var(--spacing-sm);
        }

        .footer-input-group {
            display: flex;
            gap: 8px;
        }

        .footer-input {
            flex: 1;
            background: var(--bg-card);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-sm);
            padding: 10px 14px;
            font-size: 14px;
            color: var(--text-heading);
            transition: border-color var(--transition-fast);
            min-width: 0;
        }

        .footer-input::placeholder {
            color: var(--text-muted);
            opacity: 0.7;
        }

        .footer-input:focus {
            border-color: var(--neon-green);
            outline: none;
            box-shadow: var(--shadow-glow-green);
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 8px;
            padding-top: var(--spacing-md);
            border-top: 1px solid var(--border-dark);
            font-size: 13px;
            color: var(--text-muted);
        }

        .footer-bottom-links {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .footer-bottom-links a {
            color: var(--text-muted);
            font-size: 13px;
        }

        .footer-bottom-links a:hover {
            color: var(--neon-green);
        }

        /* ============ Responsive ============ */
        @media (max-width: 1024px) {
            .main-nav {
                gap: 18px;
            }

            .main-nav a {
                font-size: 14px;
            }

            .page-hero h1 {
                font-size: 2.3rem;
            }

            .title-section h1 {
                font-size: 2rem;
            }

            .hot-guides-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .scene-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .tips-layout {
                grid-template-columns: 1fr;
            }

            .footer-grid {
                grid-template-columns: 2fr 1fr 1fr;
            }

            .footer-subscribe {
                grid-column: span 3;
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-height: 60px;
                --spacing-2xl: 64px;
                --spacing-3xl: 80px;
            }

            .header-actions {
                display: none;
            }

            .nav-toggle {
                display: flex;
            }

            .main-nav {
                display: none;
                position: absolute;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(13, 6, 24, 0.97);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                flex-direction: column;
                padding: var(--spacing-md);
                gap: 0;
                border-bottom: 1px solid var(--border-dark);
                z-index: 999;
            }

            .main-nav.open {
                display: flex;
            }

            .main-nav a {
                width: 100%;
                padding: 14px 8px;
                font-size: 16px;
                border-bottom: 1px solid rgba(180, 77, 255, 0.08);
            }

            .main-nav a:last-child {
                border-bottom: none;
            }

            .main-nav a::after {
                display: none;
            }

            .main-nav a.active {
                background: rgba(62, 255, 139, 0.06);
                border-radius: var(--radius-sm);
                border-bottom-color: transparent;
            }

            .page-hero {
                padding: calc(var(--header-height) + 32px) 0 32px;
            }

            .page-hero h1 {
                font-size: 1.8rem;
                line-height: 1.4;
            }

            .page-hero .hero-subtitle {
                font-size: 15px;
                line-height: 1.8;
            }

            .page-hero .hero-meta {
                gap: 8px;
            }

            .page-hero .hero-meta .meta-tag {
                font-size: 12px;
                padding: 2px 10px;
            }

            .section {
                padding: var(--spacing-2xl) 0;
            }

            .section-header h2 {
                font-size: 1.55rem;
            }

            .section-header .section-desc {
                font-size: 14px;
            }

            .guide-grid {
                grid-template-columns: 1fr;
            }

            .guide-card .card-cover {
                height: 160px;
            }

            .hot-guides-grid {
                grid-template-columns: 1fr;
                gap: var(--spacing-sm);
            }

            .hot-guide-card .card-cover {
                height: 120px;
            }

            .scene-grid {
                grid-template-columns: 1fr;
                gap: var(--spacing-sm);
            }

            .scene-card {
                text-align: left;
                display: flex;
                align-items: center;
                gap: var(--spacing-sm);
                padding: var(--spacing-sm) var(--spacing-md);
            }

            .scene-card .scene-icon {
                margin: 0;
                width: 42px;
                height: 42px;
                font-size: 20px;
                flex-shrink: 0;
            }

            .tips-layout {
                grid-template-columns: 1fr;
            }

            .page-cta {
                padding: var(--spacing-xl) 0;
            }

            .cta-inner {
                flex-direction: column;
                align-items: flex-start;
            }

            .cta-content h2 {
                font-size: 1.4rem;
            }

            .cta-actions {
                width: 100%;
                flex-direction: column;
            }

            .cta-actions .btn {
                width: 100%;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: var(--spacing-md);
            }

            .footer-subscribe {
                grid-column: auto;
            }

            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 6px;
            }

            .footer-bottom-links {
                flex-wrap: wrap;
            }
        }

        @media (max-width: 520px) {
            :root {
                --spacing-md: 16px;
                --spacing-lg: 24px;
                --spacing-xl: 40px;
                --spacing-2xl: 48px;
                --spacing-3xl: 64px;
            }

            .page-hero h1 {
                font-size: 1.5rem;
            }

            .page-hero .hero-subtitle {
                font-size: 14px;
            }

            .logo-text {
                font-size: 17px;
            }

            .logo-icon {
                width: 34px;
                height: 34px;
                font-size: 17px;
            }

            .guide-card .card-body {
                padding: var(--spacing-sm);
            }

            .guide-card h3 {
                font-size: 1.05rem;
            }

            .guide-card .card-excerpt {
                font-size: 13px;
            }

            .tag-pill {
                font-size: 13px;
                padding: 6px 14px;
            }
        }

/* roulang page: category1 */
:root {
            --bg-primary: #0d0618;
            --bg-secondary: #140a24;
            --bg-card: #1e1433;
            --bg-card-hover: #261a40;
            --neon-green: #3eff8b;
            --neon-green-dark: #2bcc6d;
            --neon-green-glow: rgba(62, 255, 139, 0.35);
            --electric-purple: #b44dff;
            --electric-purple-glow: rgba(180, 77, 255, 0.3);
            --amber-orange: #ffb347;
            --amber-orange-glow: rgba(255, 179, 71, 0.25);
            --text-body: #e6e3f0;
            --text-heading: #ffffff;
            --text-muted: #8f8aa8;
            --text-dark: #0a0a12;
            --border-dark: rgba(180, 77, 255, 0.18);
            --border-green: rgba(62, 255, 139, 0.5);
            --border-purple: rgba(180, 77, 255, 0.5);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 24px;
            --shadow-default: 0 8px 24px rgba(0, 0, 0, 0.35);
            --shadow-glow-green: 0 4px 18px rgba(62, 255, 139, 0.25);
            --shadow-glow-purple: 0 4px 18px rgba(180, 77, 255, 0.22);
            --shadow-hover: 0 16px 40px rgba(0, 0, 0, 0.5), 0 4px 18px rgba(62, 255, 139, 0.2);
            --font-mono: 'Consolas', 'Courier New', 'SF Mono', 'Menlo', monospace;
            --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --spacing-xs: 8px;
            --spacing-sm: 16px;
            --spacing-md: 24px;
            --spacing-lg: 40px;
            --spacing-xl: 64px;
            --spacing-2xl: 96px;
            --spacing-3xl: 120px;
            --container-max: 1200px;
            --header-height: 72px;
            --transition-fast: 0.2s ease;
            --transition-base: 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.8;
            color: var(--text-body);
            background-color: var(--bg-primary);
            background-image:
                radial-gradient(ellipse at 20% 10%, rgba(180, 77, 255, 0.08) 0%, transparent 55%),
                radial-gradient(ellipse at 80% 30%, rgba(62, 255, 139, 0.04) 0%, transparent 50%),
                radial-gradient(ellipse at 50% 80%, rgba(180, 77, 255, 0.05) 0%, transparent 45%);
            background-attachment: fixed;
            min-height: 100vh;
            overflow-x: hidden;
            padding-top: var(--header-height);
        }

        a {
            color: var(--neon-green);
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        a:hover {
            color: var(--neon-green-dark);
            text-decoration: none;
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible {
            outline: 2px solid #ffffff;
            outline-offset: 2px;
            border-radius: 2px;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            color: inherit;
        }

        button {
            cursor: pointer;
            background: none;
            border: none;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 var(--spacing-md);
            width: 100%;
        }

        section {
            padding: var(--spacing-xl) 0;
        }

        .section-alt {
            background-color: var(--bg-secondary);
            border-top: 1px solid var(--border-dark);
            border-bottom: 1px solid var(--border-dark);
        }

        .section-header {
            margin-bottom: var(--spacing-lg);
            max-width: 760px;
        }

        .section-header .section-index {
            display: inline-block;
            font-family: var(--font-mono);
            font-size: 0.85rem;
            color: var(--neon-green);
            letter-spacing: 0.12em;
            text-transform: uppercase;
            margin-bottom: var(--spacing-xs);
            border: 1px solid var(--border-green);
            padding: 2px 10px;
            border-radius: 20px;
            background: rgba(62, 255, 139, 0.08);
        }

        .section-header h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-heading);
            line-height: 1.35;
            margin-bottom: var(--spacing-sm);
        }

        .section-header p {
            color: var(--text-muted);
            font-size: 1.05rem;
        }

        /* ============ Header / Nav ============ */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-height);
            background: rgba(13, 6, 24, 0.82);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(180, 77, 255, 0.15);
            transition: background var(--transition-base), box-shadow var(--transition-base), height var(--transition-base);
        }

        .site-header.scrolled {
            background: rgba(13, 6, 24, 0.95);
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.45);
            border-bottom-color: rgba(62, 255, 139, 0.25);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-height);
            gap: var(--spacing-md);
        }

        .logo-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            text-decoration: none;
            color: var(--text-heading);
            font-weight: 700;
            font-size: 1.2rem;
        }

        .logo-brand:hover {
            color: var(--text-heading);
        }

        .logo-icon {
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--neon-green), var(--electric-purple));
            display: flex;
            align-items: center;
            justify-content: center;
            font-family: var(--font-mono);
            font-weight: 700;
            font-size: 1.25rem;
            color: var(--text-dark);
            box-shadow: 0 0 16px rgba(62, 255, 139, 0.3);
            flex-shrink: 0;
        }

        .logo-text {
            font-weight: 700;
            font-size: 1.15rem;
            color: var(--text-heading);
            white-space: nowrap;
        }

        .logo-text span {
            color: var(--neon-green);
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: var(--spacing-md);
        }

        .main-nav a {
            color: var(--text-muted);
            font-size: 0.95rem;
            font-weight: 500;
            padding: 6px 12px;
            border-radius: var(--radius-sm);
            transition: color var(--transition-fast), background var(--transition-fast);
            white-space: nowrap;
        }

        .main-nav a:hover {
            color: var(--text-heading);
            background: rgba(62, 255, 139, 0.08);
        }

        .main-nav a.active {
            color: var(--neon-green);
            background: rgba(62, 255, 139, 0.1);
            border-bottom: 2px solid var(--neon-green);
            border-radius: var(--radius-sm) var(--radius-sm) 0 0;
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: var(--spacing-xs);
            flex-shrink: 0;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
            padding: 10px 20px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.95rem;
            text-decoration: none;
            transition: all var(--transition-fast);
            white-space: nowrap;
            line-height: 1.4;
            min-height: 42px;
        }

        .btn-sm {
            padding: 8px 16px;
            font-size: 0.88rem;
            min-height: 36px;
        }

        .btn-primary {
            background: var(--neon-green);
            color: var(--text-dark);
            border: 1px solid var(--neon-green);
        }

        .btn-primary:hover {
            background: #55ff9d;
            color: var(--text-dark);
            box-shadow: var(--shadow-glow-green);
            transform: translateY(-2px);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: none;
        }

        .btn-secondary {
            background: transparent;
            color: var(--electric-purple);
            border: 1px solid var(--electric-purple);
        }

        .btn-secondary:hover {
            background: rgba(180, 77, 255, 0.12);
            color: #d08bff;
            box-shadow: var(--shadow-glow-purple);
            transform: translateY(-2px);
        }

        .btn-secondary:active {
            transform: translateY(0);
            box-shadow: none;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            background: transparent;
            border: 1px solid var(--border-dark);
            flex-shrink: 0;
        }

        .nav-toggle span {
            display: block;
            width: 20px;
            height: 2px;
            background: var(--text-heading);
            border-radius: 2px;
            transition: all var(--transition-fast);
        }

        .nav-toggle.open span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }

        .nav-toggle.open span:nth-child(2) {
            opacity: 0;
        }

        .nav-toggle.open span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: var(--header-height);
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(13, 6, 24, 0.97);
            z-index: 999;
            padding: var(--spacing-lg) var(--spacing-md);
            overflow-y: auto;
            flex-direction: column;
            gap: var(--spacing-sm);
        }

        .mobile-menu.open {
            display: flex;
        }

        .mobile-menu a {
            color: var(--text-body);
            font-size: 1.1rem;
            font-weight: 500;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            text-decoration: none;
            transition: all var(--transition-fast);
        }

        .mobile-menu a:hover,
        .mobile-menu a.active {
            color: var(--neon-green);
            background: rgba(62, 255, 139, 0.08);
        }

        .mobile-menu .mobile-actions {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
            margin-top: var(--spacing-md);
            padding-top: var(--spacing-md);
            border-top: 1px solid var(--border-dark);
        }

        .mobile-menu .btn {
            width: 100%;
            justify-content: center;
        }

        /* ============ Category Hero ============ */
        .category-hero {
            position: relative;
            padding: var(--spacing-2xl) 0 var(--spacing-xl);
            background-image: url('/assets/images/2b4b3c1a0c20be69.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            min-height: 420px;
            display: flex;
            align-items: center;
        }

        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(13, 6, 24, 0.72) 0%, rgba(13, 6, 24, 0.88) 60%, rgba(13, 6, 24, 0.98) 100%);
        }

        .category-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background-image: repeating-linear-gradient(0deg, rgba(62, 255, 139, 0.03) 0px, rgba(62, 255, 139, 0.03) 1px, transparent 1px, transparent 4px);
            pointer-events: none;
        }

        .category-hero .container {
            position: relative;
            z-index: 2;
        }

        .category-hero-content {
            max-width: 820px;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: var(--spacing-md);
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: var(--text-muted);
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        .breadcrumb a:hover {
            color: var(--neon-green);
        }

        .breadcrumb .separator {
            color: var(--electric-purple);
        }

        .breadcrumb .current {
            color: var(--neon-green);
        }

        .category-hero h1 {
            font-size: 2.8rem;
            font-weight: 700;
            color: var(--text-heading);
            line-height: 1.3;
            margin-bottom: var(--spacing-md);
            letter-spacing: -0.01em;
        }

        .category-hero h1 .highlight {
            color: var(--neon-green);
            text-shadow: 0 0 24px rgba(62, 255, 139, 0.45);
        }

        .category-hero .category-desc {
            font-size: 1.1rem;
            color: var(--text-body);
            max-width: 680px;
            line-height: 1.9;
            margin-bottom: var(--spacing-lg);
        }

        .category-hero .hero-tags {
            display: flex;
            gap: var(--spacing-xs);
            flex-wrap: wrap;
        }

        .badge {
            display: inline-block;
            padding: 4px 12px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.02em;
            white-space: nowrap;
        }

        .badge-green {
            background: rgba(62, 255, 139, 0.12);
            color: var(--neon-green);
            border: 1px solid rgba(62, 255, 139, 0.3);
        }

        .badge-purple {
            background: rgba(180, 77, 255, 0.12);
            color: #d08bff;
            border: 1px solid rgba(180, 77, 255, 0.3);
        }

        .badge-amber {
            background: rgba(255, 179, 71, 0.12);
            color: var(--amber-orange);
            border: 1px solid rgba(255, 179, 71, 0.3);
        }

        /* ============ Tutorial Cards ============ */
        .tutorial-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-lg);
        }

        .tutorial-card {
            background: var(--bg-card);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
            position: relative;
        }

        .tutorial-card:hover {
            border-color: var(--border-green);
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
            background: var(--bg-card-hover);
        }

        .tutorial-card .card-image {
            position: relative;
            aspect-ratio: 16/9;
            overflow: hidden;
            background: var(--bg-secondary);
        }

        .tutorial-card .card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-base);
        }

        .tutorial-card:hover .card-image img {
            transform: scale(1.05);
        }

        .tutorial-card .card-image .image-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 40%, rgba(30, 20, 51, 0.85) 100%);
            pointer-events: none;
        }

        .tutorial-card .card-body {
            padding: var(--spacing-md);
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: var(--spacing-xs);
        }

        .tutorial-card .card-meta {
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
            font-size: 0.8rem;
            color: var(--text-muted);
            font-family: var(--font-mono);
        }

        .tutorial-card .card-meta .card-type {
            color: var(--neon-green);
        }

        .tutorial-card .card-meta .card-date {
            color: var(--text-muted);
        }

        .tutorial-card h3 {
            font-size: 1.15rem;
            font-weight: 600;
            color: var(--text-heading);
            line-height: 1.5;
            margin: var(--spacing-xs) 0;
        }

        .tutorial-card h3 a {
            color: var(--text-heading);
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        .tutorial-card h3 a:hover {
            color: var(--neon-green);
        }

        .tutorial-card .card-excerpt {
            font-size: 0.92rem;
            color: var(--text-muted);
            line-height: 1.7;
            flex: 1;
        }

        .tutorial-card .card-link {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--neon-green);
            margin-top: var(--spacing-xs);
            transition: all var(--transition-fast);
        }

        .tutorial-card .card-link:hover {
            color: #55ff9d;
            gap: 8px;
        }

        .view-more-row {
            display: flex;
            justify-content: center;
            margin-top: var(--spacing-lg);
        }

        /* ============ Environment Requirements ============ */
        .env-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: var(--spacing-md);
        }

        .env-card {
            background: var(--bg-card);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-md);
            padding: var(--spacing-md);
            transition: all var(--transition-fast);
        }

        .env-card:hover {
            border-color: var(--border-purple);
            box-shadow: var(--shadow-glow-purple);
        }

        .env-card .env-icon {
            font-size: 1.8rem;
            margin-bottom: var(--spacing-xs);
            display: block;
        }

        .env-card h3 {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text-heading);
            margin-bottom: var(--spacing-xs);
        }

        .env-card p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.7;
        }

        .env-card .env-spec {
            font-family: var(--font-mono);
            font-size: 0.85rem;
            color: var(--neon-green);
            margin-top: var(--spacing-xs);
            display: block;
            background: rgba(62, 255, 139, 0.06);
            padding: 6px 10px;
            border-radius: 4px;
            border-left: 2px solid var(--neon-green);
        }

        /* ============ Steps ============ */
        .steps-timeline {
            position: relative;
            display: grid;
            grid-template-columns: repeat(6, 1fr);
            gap: var(--spacing-sm);
        }

        .step-item {
            background: var(--bg-card);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-md);
            padding: var(--spacing-md) var(--spacing-sm);
            text-align: center;
            transition: all var(--transition-fast);
            position: relative;
        }

        .step-item:hover {
            border-color: var(--border-green);
            box-shadow: var(--shadow-glow-green);
            transform: translateY(-3px);
        }

        .step-item .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--neon-green), var(--electric-purple));
            color: var(--text-dark);
            font-family: var(--font-mono);
            font-weight: 700;
            font-size: 1rem;
            margin-bottom: var(--spacing-xs);
        }

        .step-item h3 {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-heading);
            margin-bottom: 4px;
        }

        .step-item p {
            font-size: 0.8rem;
            color: var(--text-muted);
            line-height: 1.5;
        }

        /* ============ Notice Cards ============ */
        .notice-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-md);
        }

        .notice-card {
            background: var(--bg-card);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-md);
            padding: var(--spacing-md);
            transition: all var(--transition-fast);
            position: relative;
        }

        .notice-card:hover {
            border-color: var(--amber-orange);
            box-shadow: var(--amber-orange-glow);
        }

        .notice-card .notice-icon {
            font-size: 1.5rem;
            display: block;
            margin-bottom: var(--spacing-xs);
        }

        .notice-card h3 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-heading);
            margin-bottom: var(--spacing-xs);
        }

        .notice-card p {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* ============ Version Compatibility ============ */
        .version-table-wrap {
            overflow-x: auto;
            background: var(--bg-card);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-lg);
            padding: var(--spacing-md);
        }

        .version-table {
            width: 100%;
            border-collapse: collapse;
            min-width: 680px;
        }

        .version-table th {
            text-align: left;
            padding: 12px 16px;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--neon-green);
            border-bottom: 1px solid var(--border-green);
            font-family: var(--font-mono);
            text-transform: uppercase;
            letter-spacing: 0.05em;
        }

        .version-table td {
            padding: 12px 16px;
            font-size: 0.9rem;
            color: var(--text-body);
            border-bottom: 1px solid rgba(180, 77, 255, 0.1);
        }

        .version-table tr:last-child td {
            border-bottom: none;
        }

        .version-table tr:hover td {
            background: rgba(62, 255, 139, 0.04);
        }

        .version-table .status-ok {
            color: var(--neon-green);
            font-family: var(--font-mono);
            font-size: 0.85rem;
        }

        .version-table .status-warn {
            color: var(--amber-orange);
            font-family: var(--font-mono);
            font-size: 0.85rem;
        }

        .version-table .status-soon {
            color: #d08bff;
            font-family: var(--font-mono);
            font-size: 0.85rem;
        }

        /* ============ Verification ============ */
        .verify-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: var(--spacing-md);
            align-items: start;
        }

        .verify-card {
            background: var(--bg-card);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-lg);
            padding: var(--spacing-lg);
            transition: all var(--transition-fast);
        }

        .verify-card:hover {
            border-color: var(--border-green);
            box-shadow: var(--shadow-glow-green);
        }

        .verify-card h3 {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text-heading);
            margin-bottom: var(--spacing-sm);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .verify-card h3 .verify-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--neon-green);
            box-shadow: 0 0 8px var(--neon-green-glow);
            flex-shrink: 0;
        }

        .verify-card ul {
            list-style: none;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: var(--spacing-xs);
        }

        .verify-card ul li {
            padding-left: var(--spacing-md);
            position: relative;
            font-size: 0.92rem;
            color: var(--text-body);
            line-height: 1.7;
        }

        .verify-card ul li::before {
            content: '>';
            position: absolute;
            left: 0;
            color: var(--neon-green);
            font-family: var(--font-mono);
            font-weight: 700;
        }

        /* ============ CTA Section ============ */
        .cta-section {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-dark);
            border-bottom: 1px solid var(--border-dark);
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image:
                radial-gradient(ellipse at 70% 50%, rgba(62, 255, 139, 0.06) 0%, transparent 50%),
                radial-gradient(ellipse at 30% 50%, rgba(180, 77, 255, 0.06) 0%, transparent 50%);
            pointer-events: none;
        }

        .cta-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: var(--spacing-lg);
            flex-wrap: wrap;
            position: relative;
            z-index: 2;
        }

        .cta-text {
            flex: 1;
            min-width: 280px;
        }

        .cta-text h2 {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: var(--spacing-xs);
        }

        .cta-text p {
            color: var(--text-muted);
            font-size: 1rem;
        }

        .cta-actions {
            display: flex;
            gap: var(--spacing-sm);
            flex-shrink: 0;
            flex-wrap: wrap;
        }

        /* ============ Footer ============ */
        .site-footer {
            background: #0a0512;
            border-top: 1px solid var(--border-dark);
            padding: var(--spacing-xl) 0 var(--spacing-md);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 0.8fr 0.8fr 1.4fr;
            gap: var(--spacing-lg);
            margin-bottom: var(--spacing-lg);
        }

        .footer-brand-col .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: var(--spacing-sm);
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-heading);
        }

        .footer-brand-col .footer-logo .logo-icon {
            width: 32px;
            height: 32px;
            font-size: 1rem;
        }

        .footer-brand-desc {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.7;
        }

        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-heading);
            margin-bottom: var(--spacing-sm);
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .footer-col ul li a {
            color: var(--text-muted);
            font-size: 0.9rem;
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        .footer-col ul li a:hover {
            color: var(--neon-green);
        }

        .footer-subscribe p {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: var(--spacing-xs);
            line-height: 1.6;
        }

        .footer-input-group {
            display: flex;
            gap: 8px;
        }

        .footer-input {
            flex: 1;
            background: var(--bg-card);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-sm);
            padding: 8px 12px;
            font-size: 0.88rem;
            color: var(--text-body);
            min-width: 0;
        }

        .footer-input:focus {
            border-color: var(--neon-green);
            outline: none;
            box-shadow: 0 0 8px rgba(62, 255, 139, 0.2);
        }

        .footer-input::placeholder {
            color: var(--text-muted);
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: var(--spacing-xs);
            padding-top: var(--spacing-md);
            border-top: 1px solid rgba(180, 77, 255, 0.1);
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        .footer-bottom-links {
            display: flex;
            align-items: center;
            gap: var(--spacing-xs);
        }

        .footer-bottom-links a {
            color: var(--text-muted);
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        .footer-bottom-links a:hover {
            color: var(--neon-green);
        }

        .footer-bottom-links span {
            color: var(--text-muted);
        }

        /* ============ Responsive ============ */
        @media (max-width: 1023px) {
            .container {
                padding: 0 var(--spacing-sm);
            }

            section {
                padding: var(--spacing-lg) 0;
            }

            .category-hero h1 {
                font-size: 2.2rem;
            }

            .tutorial-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .steps-timeline {
                grid-template-columns: repeat(3, 1fr);
                gap: var(--spacing-sm);
            }

            .notice-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .env-grid {
                grid-template-columns: 1fr;
            }

            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .header-actions {
                display: none;
            }
        }

        @media (max-width: 767px) {
            .main-nav {
                display: none;
            }

            .header-actions {
                display: none;
            }

            .nav-toggle {
                display: flex;
            }

            .mobile-menu {
                display: none;
            }

            .mobile-menu.open {
                display: flex;
            }

            .category-hero {
                min-height: 320px;
                padding: var(--spacing-xl) 0 var(--spacing-lg);
            }

            .category-hero h1 {
                font-size: 1.8rem;
            }

            .category-hero .category-desc {
                font-size: 1rem;
            }

            .section-header h2 {
                font-size: 1.5rem;
            }

            .tutorial-grid {
                grid-template-columns: 1fr;
            }

            .steps-timeline {
                grid-template-columns: repeat(2, 1fr);
            }

            .notice-grid {
                grid-template-columns: 1fr;
            }

            .verify-grid {
                grid-template-columns: 1fr;
            }

            .cta-inner {
                flex-direction: column;
                text-align: center;
            }

            .cta-actions {
                justify-content: center;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: var(--spacing-md);
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }

            .footer-input-group {
                flex-direction: column;
            }

            .footer-input-group .btn {
                width: 100%;
            }
        }

        @media (max-width: 520px) {
            .category-hero h1 {
                font-size: 1.5rem;
            }

            .steps-timeline {
                grid-template-columns: 1fr;
            }

            .btn {
                padding: 8px 14px;
                font-size: 0.88rem;
            }
        }

/* roulang page: category3 */
:root {
    --bg-primary: #0d0618;
    --bg-secondary: #140a24;
    --bg-card: #1e1433;
    --bg-card-hover: #261a40;
    --neon-green: #3eff8b;
    --neon-green-dark: #2bcc6d;
    --neon-green-glow: rgba(62, 255, 139, 0.35);
    --electric-purple: #b44dff;
    --electric-purple-glow: rgba(180, 77, 255, 0.3);
    --amber-orange: #ffb347;
    --amber-orange-glow: rgba(255, 179, 71, 0.25);
    --text-body: #e6e3f0;
    --text-heading: #ffffff;
    --text-muted: #8f8aa8;
    --text-dark: #0a0a12;
    --border-dark: rgba(180, 77, 255, 0.18);
    --border-green: rgba(62, 255, 139, 0.5);
    --border-purple: rgba(180, 77, 255, 0.5);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --shadow-default: 0 8px 24px rgba(0, 0, 0, 0.35);
    --shadow-glow-green: 0 4px 18px rgba(62, 255, 139, 0.25);
    --shadow-glow-purple: 0 4px 18px rgba(180, 77, 255, 0.22);
    --shadow-hover: 0 16px 40px rgba(0, 0, 0, 0.5), 0 4px 18px rgba(62, 255, 139, 0.2);
    --font-mono: 'Consolas', 'Courier New', 'SF Mono', 'Menlo', monospace;
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 40px;
    --spacing-xl: 64px;
    --spacing-2xl: 96px;
    --spacing-3xl: 120px;
    --container-max: 1200px;
    --header-height: 72px;
    --transition-fast: 0.2s ease;
    --transition-base: 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  }

  html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
  }
  *,
  *::before,
  *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
  }
  body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.8;
    color: var(--text-body);
    background-color: var(--bg-primary);
    background-image:
      radial-gradient(ellipse at 20% 10%, rgba(180, 77, 255, 0.08) 0%, transparent 55%),
      radial-gradient(ellipse at 80% 30%, rgba(62, 255, 139, 0.04) 0%, transparent 50%),
      radial-gradient(ellipse at 50% 80%, rgba(180, 77, 255, 0.05) 0%, transparent 45%);
    background-attachment: fixed;
    min-height: 100vh;
    overflow-x: hidden;
  }
  a {
    color: var(--neon-green);
    text-decoration: none;
    transition: color var(--transition-fast);
  }
  a:hover {
    color: var(--neon-green-dark);
    text-decoration: none;
  }
  a:focus-visible,
  button:focus-visible,
  input:focus-visible,
  textarea:focus-visible {
    outline: 2px solid #ffffff;
    outline-offset: 2px;
    border-radius: 2px;
  }
  img {
    max-width: 100%;
    height: auto;
    display: block;
  }
  button,
  input,
  textarea,
  select {
    font-family: inherit;
    font-size: inherit;
    line-height: inherit;
    color: inherit;
  }
  button {
    cursor: pointer;
    background: none;
    border: none;
  }
  ul,
  ol {
    list-style: none;
  }
  .container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    width: 100%;
  }

  /* ============ Header / Nav ============ */
  .site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: var(--header-height);
    background: rgba(13, 6, 24, 0.82);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(180, 77, 255, 0.15);
    transition: background var(--transition-base), box-shadow var(--transition-base), height var(--transition-base);
  }
  .site-header.scrolled {
    background: rgba(13, 6, 24, 0.95);
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.45);
    border-bottom-color: rgba(62, 255, 139, 0.25);
  }
  .header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-height);
    gap: var(--spacing-md);
  }
  .logo-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
    text-decoration: none;
    color: var(--text-heading);
  }
  .logo-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    background: linear-gradient(135deg, var(--neon-green), var(--electric-purple));
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1.3rem;
    color: #0a0a12;
    box-shadow: var(--shadow-glow-green);
  }
  .logo-text {
    font-size: 1.35rem;
    font-weight: 700;
    letter-spacing: 0.5px;
    white-space: nowrap;
  }
  .logo-text span {
    color: var(--neon-green);
  }
  .main-nav {
    display: flex;
    align-items: center;
    gap: clamp(12px, 2vw, 28px);
    margin-left: auto;
  }
  .main-nav a {
    color: var(--text-muted);
    font-size: 0.98rem;
    padding: 8px 0;
    position: relative;
    white-space: nowrap;
  }
  .main-nav a:hover {
    color: var(--text-heading);
  }
  .main-nav a::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 0;
    height: 2px;
    background: var(--neon-green);
    transition: width var(--transition-base);
    box-shadow: var(--shadow-glow-green);
  }
  .main-nav a:hover::after,
  .main-nav a.active::after {
    width: 100%;
  }
  .main-nav a.active {
    color: var(--neon-green);
  }
  .header-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    flex-shrink: 0;
  }
  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    padding: 10px 20px;
    font-size: 0.95rem;
    transition: transform var(--transition-fast), box-shadow var(--transition-base), background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
    white-space: nowrap;
    cursor: pointer;
    line-height: 1.4;
  }
  .btn-sm {
    padding: 8px 16px;
    font-size: 0.88rem;
  }
  .btn-primary {
    background: var(--neon-green);
    color: var(--text-dark);
    border: 1px solid var(--neon-green);
  }
  .btn-primary:hover {
    background: var(--neon-green-dark);
    border-color: var(--neon-green-dark);
    box-shadow: var(--shadow-glow-green);
    transform: translateY(-2px);
    color: var(--text-dark);
  }
  .btn-primary:active {
    transform: translateY(0);
  }
  .btn-secondary {
    background: transparent;
    color: var(--electric-purple);
    border: 1px solid var(--electric-purple);
  }
  .btn-secondary:hover {
    background: rgba(180, 77, 255, 0.12);
    box-shadow: var(--shadow-glow-purple);
    transform: translateY(-2px);
    color: #ffffff;
  }
  .btn-outline {
    background: transparent;
    color: var(--neon-green);
    border: 1px solid var(--border-green);
  }
  .btn-outline:hover {
    background: rgba(62, 255, 139, 0.08);
    box-shadow: var(--shadow-glow-green);
    transform: translateY(-2px);
  }
  .nav-toggle {
    display: none;
    width: 44px;
    height: 44px;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    border-radius: var(--radius-sm);
    background: rgba(180, 77, 255, 0.08);
    border: 1px solid rgba(180, 77, 255, 0.25);
    z-index: 1002;
  }
  .nav-toggle span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--text-heading);
    border-radius: 2px;
    transition: transform var(--transition-base), opacity var(--transition-base);
  }
  .nav-toggle.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }
  .nav-toggle.active span:nth-child(2) {
    opacity: 0;
  }
  .nav-toggle.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  /* ============ Page Hero ============ */
  .page-header {
    padding: calc(var(--header-height) + 48px) 0 48px;
    background-image:
      linear-gradient(rgba(13, 6, 24, 0.75), rgba(13, 6, 24, 0.9)),
      url('/assets/images/2b4b3c1a0c20be69.webp');
    background-size: cover;
    background-position: center;
    border-bottom: 1px solid rgba(180, 77, 255, 0.2);
    position: relative;
    overflow: hidden;
  }
  .page-header::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
      linear-gradient(rgba(62, 255, 139, 0.03) 1px, transparent 1px),
      linear-gradient(90deg, rgba(62, 255, 139, 0.03) 1px, transparent 1px);
    background-size: 32px 32px;
    pointer-events: none;
  }
  .breadcrumb {
    position: relative;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: var(--spacing-md);
  }
  .breadcrumb a {
    color: var(--text-muted);
  }
  .breadcrumb a:hover {
    color: var(--neon-green);
  }
  .breadcrumb .sep {
    opacity: 0.6;
  }
  .breadcrumb .current {
    color: var(--neon-green);
  }
  .page-header h1 {
    position: relative;
    font-size: clamp(2rem, 4vw, 3rem);
    line-height: 1.25;
    color: var(--text-heading);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.5px;
  }
  .page-header h1 .highlight {
    color: var(--neon-green);
  }
  .page-header-desc {
    position: relative;
    font-size: 1.05rem;
    color: var(--text-body);
    max-width: 760px;
    margin-bottom: var(--spacing-lg);
  }
  .page-header-stats {
    position: relative;
    display: flex;
    flex-wrap: wrap;
    gap: 28px;
  }
  .page-header-stat {
    display: flex;
    align-items: center;
    gap: 10px;
    background: rgba(30, 20, 51, 0.7);
    border: 1px solid rgba(180, 77, 255, 0.25);
    border-radius: var(--radius-md);
    padding: 12px 18px;
    backdrop-filter: blur(8px);
  }
  .page-header-stat .stat-num {
    font-family: var(--font-mono);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--neon-green);
  }
  .page-header-stat .stat-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    display: block;
    line-height: 1.3;
  }

  /* ============ Sections ============ */
  section {
    padding: var(--spacing-2xl) 0;
    position: relative;
  }
  .section-alt {
    background: rgba(20, 10, 36, 0.55);
  }
  .section-header {
    margin-bottom: var(--spacing-xl);
  }
  .section-tag {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--electric-purple);
    background: rgba(180, 77, 255, 0.1);
    border: 1px solid rgba(180, 77, 255, 0.35);
    border-radius: 999px;
    padding: 4px 14px;
    letter-spacing: 0.03em;
    margin-bottom: var(--spacing-sm);
  }
  .section-header h2 {
    font-size: clamp(1.6rem, 3vw, 2.2rem);
    color: var(--text-heading);
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: var(--spacing-sm);
  }
  .section-header .section-sub {
    font-size: 1rem;
    color: var(--text-muted);
    max-width: 720px;
  }

  /* ============ Doc Directory ============ */
  .doc-directory-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--spacing-md);
  }
  .doc-directory-item {
    background: var(--bg-card);
    border: 1px solid var(--border-dark);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    transition: border-color var(--transition-base), transform var(--transition-fast), box-shadow var(--transition-base);
    position: relative;
    overflow: hidden;
  }
  .doc-directory-item:hover {
    border-color: var(--border-green);
    box-shadow: var(--shadow-hover);
    transform: translateY(-3px);
  }
  .doc-directory-item .dir-icon {
    font-family: var(--font-mono);
    color: var(--amber-orange);
    font-weight: 700;
    font-size: 0.9rem;
    margin-bottom: 8px;
    display: inline-block;
  }
  .doc-directory-item h3 {
    font-size: 1.1rem;
    color: var(--text-heading);
    margin-bottom: 4px;
  }
  .doc-directory-item p {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.6;
  }

  /* ============ Doc List ============ */
  .doc-list-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--spacing-lg);
  }
  .doc-card {
    background: var(--bg-card);
    border: 1px solid var(--border-dark);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
    display: flex;
    flex-direction: column;
  }
  .doc-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
    border-color: var(--border-green);
  }
  .doc-card-image {
    position: relative;
    height: 180px;
    background: var(--bg-secondary);
    overflow: hidden;
    border-bottom: 1px solid var(--border-dark);
  }
  .doc-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-base);
  }
  .doc-card:hover .doc-card-image img {
    transform: scale(1.04);
  }
  .doc-card-image::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 40%, rgba(13, 6, 24, 0.75) 100%);
  }
  .doc-card-badge {
    position: absolute;
    top: 14px;
    left: 14px;
    z-index: 2;
    background: rgba(62, 255, 139, 0.18);
    color: var(--neon-green);
    border: 1px solid rgba(62, 255, 139, 0.45);
    padding: 4px 12px;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    backdrop-filter: blur(6px);
  }
  .doc-card-body {
    padding: var(--spacing-md);
    flex: 1;
    display: flex;
    flex-direction: column;
  }
  .doc-card-body h3 {
    font-size: 1.2rem;
    color: var(--text-heading);
    margin-bottom: 10px;
    font-weight: 700;
    line-height: 1.4;
  }
  .doc-card-body p {
    font-size: 0.93rem;
    color: var(--text-muted);
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
    flex: 1;
  }
  .doc-card-meta {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: auto;
    padding-top: var(--spacing-sm);
    border-top: 1px solid rgba(180, 77, 255, 0.12);
  }
  .doc-card-meta .meta-item {
    display: inline-flex;
    align-items: center;
    gap: 5px;
  }
  .doc-card-meta .doc-type {
    color: var(--electric-purple);
    font-weight: 600;
  }

  /* ============ Tech Features ============ */
  .tech-features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--spacing-md);
  }
  .tech-feature-item {
    background: var(--bg-card);
    border: 1px solid var(--border-dark);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    transition: border-color var(--transition-base), transform var(--transition-fast);
  }
  .tech-feature-item:hover {
    border-color: var(--border-purple);
    transform: translateY(-3px);
  }
  .tech-feature-item .feature-icon {
    font-family: var(--font-mono);
    color: var(--neon-green);
    font-weight: 700;
    margin-bottom: 10px;
    display: inline-block;
  }
  .tech-feature-item h3 {
    color: var(--text-heading);
    font-size: 1.1rem;
    margin-bottom: 6px;
  }
  .tech-feature-item p {
    font-size: 0.9rem;
    color: var(--text-muted);
  }

  /* ============ Quick Nav ============ */
  .quick-nav-panels {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--spacing-md);
  }
  .quick-nav-panel {
    background: rgba(30, 20, 51, 0.7);
    border: 1px solid rgba(180, 77, 255, 0.22);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    transition: border-color var(--transition-base), transform var(--transition-fast);
  }
  .quick-nav-panel:hover {
    border-color: var(--border-green);
    transform: translateY(-2px);
  }
  .quick-nav-panel h3 {
    color: var(--text-heading);
    font-size: 1.05rem;
    margin-bottom: 8px;
  }
  .quick-nav-panel ul {
    display: flex;
    flex-direction: column;
    gap: 6px;
  }
  .quick-nav-panel ul li a {
    font-size: 0.92rem;
    color: var(--text-muted);
    display: inline-block;
    padding: 2px 0;
  }
  .quick-nav-panel ul li a:hover {
    color: var(--neon-green);
  }

  /* ============ Dev Guide ============ */
  .dev-guide-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
    gap: var(--spacing-md);
  }
  .dev-guide-step {
    background: var(--bg-card);
    border: 1px solid var(--border-dark);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    position: relative;
  }
  .dev-guide-step .step-number {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--amber-orange);
    font-weight: 700;
    background: rgba(255, 179, 71, 0.12);
    border: 1px solid rgba(255, 179, 71, 0.3);
    border-radius: var(--radius-sm);
    padding: 4px 10px;
    margin-bottom: 10px;
  }
  .dev-guide-step h3 {
    color: var(--text-heading);
    font-size: 1.05rem;
    margin-bottom: 6px;
  }
  .dev-guide-step p {
    font-size: 0.9rem;
    color: var(--text-muted);
  }

  /* ============ Update Note ============ */
  .update-timeline {
    position: relative;
    padding-left: 28px;
  }
  .update-timeline::before {
    content: '';
    position: absolute;
    left: 10px;
    top: 6px;
    bottom: 6px;
    width: 2px;
    background: rgba(180, 77, 255, 0.35);
  }
  .update-item {
    position: relative;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
  }
  .update-item:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
  }
  .update-item::before {
    content: '';
    position: absolute;
    left: -24px;
    top: 6px;
    width: px;
    height: 12px;
    border-radius: 50%;
    background: var(--neon-green);
    box-shadow: 0 0 12px var(--neon-green-glow);
    border: 2px solid var(--bg-primary);
  }
  .update-item h4 {
    color: var(--text-heading);
    font-size: 1rem;
    margin-bottom: 4px;
  }
  .update-item p {
    font-size: 0.9rem;
    color: var(--text-muted);
  }
  .update-item .update-date {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--amber-orange);
    display: block;
    margin-bottom: 2px;
  }

  /* ============ Inquiry ============ */
  .inquiry-panel {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: var(--spacing-lg);
    background: rgba(30, 20, 51, 0.8);
    border: 1px solid rgba(180, 77, 255, 0.35);
    border-radius: var(--radius-xl);
    padding: clamp(var(--spacing-lg), 5vw, var(--spacing-xl));
    background-image: radial-gradient(ellipse at top right, rgba(62, 255, 139, 0.08), transparent 55%);
  }
  .inquiry-panel h3 {
    color: var(--text-heading);
    font-size: 1.6rem;
    margin-bottom: var(--spacing-sm);
  }
  .inquiry-panel p {
    color: var(--text-muted);
    font-size: 0.98rem;
  }
  .inquiry-form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
  }
  .form-input {
    background: rgba(13, 6, 24, 0.75);
    border: 1px solid rgba(180, 77, 255, 0.3);
    border-radius: var(--radius-sm);
    padding: 12px 16px;
    color: var(--text-body);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    font-size: 0.95rem;
    width: 100%;
  }
  .form-input::placeholder {
    color: #6d6885;
  }
  .form-input:focus {
    outline: none;
    border-color: var(--neon-green);
    box-shadow: var(--shadow-glow-green);
  }

  /* ============ Footer ============ */
  .site-footer {
    background: rgba(10, 5, 18, 0.88);
    border-top: 1px solid rgba(180, 77, 255, 0.2);
    padding-top: var(--spacing-2xl);
  }
  .footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1.3fr;
    gap: var(--spacing-xl);
    padding-bottom: var(--spacing-xl);
  }
  .footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-heading);
    margin-bottom: var(--spacing-sm);
  }
  .footer-brand-desc {
    font-size: 0.92rem;
    color: var(--text-muted);
    line-height: 1.8;
  }
  .footer-col h4 {
    color: var(--text-heading);
    font-size: 1rem;
    margin-bottom: var(--spacing-sm);
  }
  .footer-col ul {
    display: flex;
    flex-direction: column;
    gap: 8px;
  }
  .footer-col ul li a {
    font-size: 0.92rem;
    color: var(--text-muted);
  }
  .footer-col ul li a:hover {
    color: var(--neon-green);
  }
  .footer-subscribe p {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: var(--spacing-sm);
  }
  .footer-input-group {
    display: flex;
    gap: 8px;
  }
  .footer-input {
    flex: 1;
    background: rgba(30, 20, 51, 0.75);
    border: 1px solid rgba(180, 77, 255, 0.3);
    border-radius: var(--radius-sm);
    padding: 9px 12px;
    color: var(--text-body);
    font-size: 0.88rem;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    min-width: 0;
  }
  .footer-input::placeholder {
    color: #6d6885;
  }
  .footer-input:focus {
    outline: none;
    border-color: var(--neon-green);
    box-shadow: var(--shadow-glow-green);
  }
  .footer-bottom {
    border-top: 1px solid rgba(180, 77, 255, 0.18);
    padding: var(--spacing-md) 0;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    font-size: 0.85rem;
    color: var(--text-muted);
  }
  .footer-bottom-links {
    display: flex;
    align-items: center;
    gap: 10px;
  }
  .footer-bottom-links a {
    color: var(--text-muted);
  }
  .footer-bottom-links a:hover {
    color: var(--neon-green);
  }

  /* ============ Responsive ============ */
  @media (max-width: 1023px) {
    .header-actions {
      gap: 6px;
    }
    .main-nav {
      gap: 12px;
    }
    .footer-grid {
      grid-template-columns: 1fr 1fr;
      gap: var(--spacing-lg);
    }
    .footer-brand-col {
      grid-column: 1 / -1;
    }
    .inquiry-panel {
      grid-template-columns: 1fr;
    }
    .doc-list-grid {
      grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    }
  }

  @media (max-width: 767px) {
    .main-nav {
      display: none;
    }
    .header-actions {
      display: none;
    }
    .nav-toggle {
      display: flex;
    }
    .main-nav.mobile-open {
      display: flex;
      flex-direction: column;
      align-items: flex-start;
      gap: 0;
      position: fixed;
      top: var(--header-height);
      left: 0;
      right: 0;
      bottom: 0;
      background: rgba(13, 6, 24, 0.98);
      padding: var(--spacing-lg) var(--spacing-md);
      overflow-y: auto;
      z-index: 1001;
    }
    .main-nav.mobile-open a {
      width: 100%;
      padding: 14px 0;
      font-size: 1.15rem;
      border-bottom: 1px solid rgba(180, 77, 255, 0.2);
      color: var(--text-body);
    }
    .main-nav.mobile-open a.active {
      color: var(--neon-green);
    }
    .header-actions.mobile-open {
      display: flex;
      position: fixed;
      left: 0;
      right: 0;
      bottom: 0;
      padding: var(--spacing-md);
      background: rgba(13, 6, 24, 0.98);
      gap: 10px;
      z-index: 1001;
    }
    .header-actions.mobile-open .btn {
      flex: 1;
      width: 50%;
    }
    section {
      padding: var(--spacing-xl) 0;
    }
    .page-header {
      padding: calc(var(--header-height) + 28px) 0 32px;
    }
    .page-header-stats {
      gap: 12px;
    }
    .page-header-stat {
      padding: 10px 14px;
    }
    .footer-grid {
      grid-template-columns: 1fr;
      gap: var(--spacing-lg);
    }
    .footer-bottom {
      flex-direction: column;
      align-items: flex-start;
    }
    .footer-input-group {
      flex-direction: column;
    }
    .footer-input-group .btn {
      width: 100%;
    }
    .doc-list-grid {
      grid-template-columns: 1fr;
    }
    .doc-directory-grid {
      grid-template-columns: 1fr 1fr;
    }
    .update-timeline {
      padding-left: 22px;
    }
    .update-item::before {
      left: -19px;
    }
  }

  @media (max-width: 520px) {
    .doc-directory-grid {
      grid-template-columns: 1fr;
    }
    .tech-features-grid {
      grid-template-columns: 1fr;
    }
    .quick-nav-panels {
      grid-template-columns: 1fr;
    }
    .dev-guide-steps {
      grid-template-columns: 1fr;
    }
    .page-header h1 {
      font-size: 1.8rem;
    }
  }

/* roulang page: category4 */
:root {
            --bg-primary: #0d0618;
            --bg-secondary: #140a24;
            --bg-card: #1e1433;
            --bg-card-hover: #261a40;
            --neon-green: #3eff8b;
            --neon-green-dark: #2bcc6d;
            --neon-green-glow: rgba(62, 255, 139, 0.35);
            --electric-purple: #b44dff;
            --electric-purple-glow: rgba(180, 77, 255, 0.3);
            --amber-orange: #ffb347;
            --amber-orange-glow: rgba(255, 179, 71, 0.25);
            --text-body: #e6e3f0;
            --text-heading: #ffffff;
            --text-muted: #8f8aa8;
            --text-dark: #0a0a12;
            --border-dark: rgba(180, 77, 255, 0.18);
            --border-green: rgba(62, 255, 139, 0.5);
            --border-purple: rgba(180, 77, 255, 0.5);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 24px;
            --shadow-default: 0 8px 24px rgba(0, 0, 0, 0.35);
            --shadow-glow-green: 0 4px 18px rgba(62, 255, 139, 0.25);
            --shadow-glow-purple: 0 4px 18px rgba(180, 77, 255, 0.22);
            --shadow-hover: 0 16px 40px rgba(0, 0, 0, 0.5), 0 4px 18px rgba(62, 255, 139, 0.2);
            --font-mono: 'Consolas', 'Courier New', 'SF Mono', 'Menlo', monospace;
            --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --spacing-xs: 8px;
            --spacing-sm: 16px;
            --spacing-md: 24px;
            --spacing-lg: 40px;
            --spacing-xl: 64px;
            --spacing-2xl: 96px;
            --spacing-3xl: 120px;
            --container-max: 1200px;
            --header-height: 72px;
            --transition-fast: 0.2s ease;
            --transition-base: 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.8;
            color: var(--text-body);
            background-color: var(--bg-primary);
            background-image:
                radial-gradient(ellipse at 20% 10%, rgba(180, 77, 255, 0.08) 0%, transparent 55%),
                radial-gradient(ellipse at 80% 30%, rgba(62, 255, 139, 0.04) 0%, transparent 50%),
                radial-gradient(ellipse at 50% 80%, rgba(180, 77, 255, 0.05) 0%, transparent 45%);
            background-attachment: fixed;
            min-height: 100vh;
            overflow-x: hidden;
        }

        a {
            color: var(--neon-green);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--neon-green-dark);
            text-decoration: none;
        }
        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible {
            outline: 2px solid #ffffff;
            outline-offset: 2px;
            border-radius: 2px;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            color: inherit;
        }

        button {
            cursor: pointer;
            background: none;
            border: none;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 var(--spacing-md);
            width: 100%;
        }

        /* ============ Header / Nav ============ */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-height);
            background: rgba(13, 6, 24, 0.82);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(180, 77, 255, 0.15);
            transition: background var(--transition-base), box-shadow var(--transition-base), height var(--transition-base);
        }
        .site-header.scrolled {
            background: rgba(13, 6, 24, 0.96);
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.45);
            border-bottom-color: rgba(62, 255, 139, 0.25);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-height);
            gap: var(--spacing-md);
        }
        .logo-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            text-decoration: none;
            color: var(--text-heading);
        }
        .logo-icon {
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--neon-green), var(--electric-purple));
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 20px;
            color: #0a0a12;
            font-family: var(--font-mono);
            box-shadow: var(--shadow-glow-green);
            letter-spacing: -0.5px;
        }
        .logo-text {
            font-size: 1.25rem;
            font-weight: 700;
            letter-spacing: -0.3px;
            color: var(--text-heading);
        }
        .logo-text span {
            color: var(--neon-green);
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
            flex: 1;
            justify-content: center;
        }
        .main-nav a {
            display: inline-block;
            padding: 8px 14px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-muted);
            border-radius: var(--radius-sm);
            transition: color var(--transition-fast), background var(--transition-fast);
            white-space: nowrap;
        }
        .main-nav a:hover {
            color: var(--text-heading);
            background: rgba(180, 77, 255, 0.1);
        }
        .main-nav a.active {
            color: var(--neon-green);
            background: rgba(62, 255, 139, 0.08);
            box-shadow: inset 0 -2px 0 var(--neon-green);
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: var(--spacing-xs);
            flex-shrink: 0;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 24px;
            font-size: 0.95rem;
            font-weight: 600;
            border-radius: var(--radius-sm);
            transition: all var(--transition-base);
            text-decoration: none;
            line-height: 1.4;
            white-space: nowrap;
        }
        .btn-sm {
            padding: 8px 16px;
            font-size: 0.875rem;
            border-radius: 6px;
        }
        .btn-primary {
            background: var(--neon-green);
            color: var(--text-dark);
            box-shadow: var(--shadow-glow-green);
        }
        .btn-primary:hover {
            background: #5affa0;
            color: var(--text-dark);
            box-shadow: 0 6px 24px rgba(62, 255, 139, 0.45);
            transform: translateY(-2px);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: var(--shadow-glow-green);
        }
        .btn-secondary {
            background: transparent;
            color: var(--electric-purple);
            border: 1px solid var(--border-purple);
            box-shadow: 0 0 12px rgba(180, 77, 255, 0.12);
        }
        .btn-secondary:hover {
            background: rgba(180, 77, 255, 0.12);
            color: #c77dff;
            border-color: rgba(180, 77, 255, 0.7);
            box-shadow: 0 4px 16px rgba(180, 77, 255, 0.25);
            transform: translateY(-2px);
        }
        .btn-secondary:active {
            transform: translateY(0);
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            border-radius: var(--radius-sm);
            transition: background var(--transition-fast);
            z-index: 1100;
            position: relative;
        }
        .nav-toggle span {
            display: block;
            width: 26px;
            height: 2px;
            background: var(--text-heading);
            border-radius: 2px;
            transition: all var(--transition-base);
            transform-origin: center;
        }
        .nav-toggle:hover {
            background: rgba(62, 255, 139, 0.1);
        }
        .nav-toggle.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
            background: var(--neon-green);
        }
        .nav-toggle.open span:nth-child(2) {
            opacity: 0;
            transform: scaleX(0);
        }
        .nav-toggle.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
            background: var(--neon-green);
        }

        /* ============ Breadcrumb ============ */
        .breadcrumb-section {
            padding-top: calc(var(--header-height) + 32px);
            padding-bottom: 0;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.875rem;
            color: var(--text-muted);
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }
        .breadcrumb a:hover {
            color: var(--neon-green);
        }
        .breadcrumb .sep {
            color: rgba(143, 138, 168, 0.5);
            font-size: 0.75rem;
        }
        .breadcrumb .current {
            color: var(--neon-green);
            font-weight: 500;
        }

        /* ============ Category Header ============ */
        .category-header {
            padding: var(--spacing-lg) 0 var(--spacing-xl);
        }
        .category-header-inner {
            display: flex;
            align-items: flex-start;
            gap: var(--spacing-xl);
            flex-wrap: wrap;
        }
        .category-header-text {
            flex: 1 1 60%;
            min-width: 300px;
        }
        .category-header-text h1 {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--text-heading);
            line-height: 1.25;
            letter-spacing: -0.5px;
            margin-bottom: var(--spacing-md);
        }
        .category-header-text h1 .highlight {
            color: var(--neon-green);
            background: rgba(62, 255, 139, 0.08);
            padding: 0 8px;
            border-radius: 4px;
        }
        .category-header-text .lead {
            font-size: 1.1rem;
            color: var(--text-muted);
            line-height: 1.9;
            max-width: 640px;
        }
        .category-header-stats {
            flex: 0 1 340px;
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-sm);
            background: var(--bg-card);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-lg);
            padding: var(--spacing-md);
            box-shadow: var(--shadow-default);
        }
        .stat-mini {
            text-align: center;
            padding: var(--spacing-sm);
        }
        .stat-mini .stat-num {
            font-family: var(--font-mono);
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--neon-green);
            line-height: 1.2;
        }
        .stat-mini .stat-label {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-top: 4px;
        }

        /* ============ Section Base ============ */
        .section {
            padding: var(--spacing-xl) 0;
        }
        .section-alt {
            background: rgba(20, 10, 36, 0.5);
            border-top: 1px solid rgba(180, 77, 255, 0.08);
            border-bottom: 1px solid rgba(180, 77, 255, 0.08);
        }
        .section-head {
            margin-bottom: var(--spacing-lg);
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: var(--spacing-md);
            flex-wrap: wrap;
        }
        .section-head h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-heading);
            line-height: 1.3;
            letter-spacing: -0.3px;
        }
        .section-head h2 .num {
            font-family: var(--font-mono);
            color: var(--electric-purple);
            font-size: 1.1rem;
            margin-right: 8px;
            font-weight: 500;
        }
        .section-head .sub {
            color: var(--text-muted);
            font-size: 0.95rem;
            max-width: 480px;
        }

        /* ============ Latest News Highlight ============ */
        .latest-highlight {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: var(--spacing-lg);
            align-items: stretch;
        }
        .latest-main-card {
            background: var(--bg-card);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-default);
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
        }
        .latest-main-card:hover {
            border-color: var(--border-green);
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .latest-main-card .card-img-wrap {
            position: relative;
            aspect-ratio: 16/9;
            overflow: hidden;
            background: var(--bg-secondary);
        }
        .latest-main-card .card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-base);
        }
        .latest-main-card:hover .card-img-wrap img {
            transform: scale(1.04);
        }
        .latest-main-card .card-img-wrap::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 40%, rgba(13, 6, 24, 0.9) 100%);
            pointer-events: none;
        }
        .latest-main-card .card-badge {
            position: absolute;
            top: 16px;
            left: 16px;
            background: var(--neon-green);
            color: var(--text-dark);
            padding: 4px 12px;
            border-radius: 4px;
            font-size: 0.75rem;
            font-weight: 700;
            z-index: 2;
        }
        .latest-main-card .card-body {
            padding: var(--spacing-lg);
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .latest-main-card .card-body h3 {
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--text-heading);
            line-height: 1.4;
            margin-bottom: var(--spacing-sm);
        }
        .latest-main-card .card-body p {
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.8;
            margin-bottom: var(--spacing-md);
            flex: 1;
        }
        .card-meta {
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
            font-size: 0.8rem;
            color: var(--text-muted);
            flex-wrap: wrap;
        }
        .card-meta .tag {
            background: rgba(180, 77, 255, 0.15);
            color: var(--electric-purple);
            padding: 2px 10px;
            border-radius: 4px;
            font-size: 0.75rem;
            font-weight: 500;
        }
        .latest-side-list {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
        }
        .latest-side-item {
            background: var(--bg-card);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-md);
            padding: var(--spacing-md);
            display: flex;
            align-items: center;
            gap: var(--spacing-md);
            transition: all var(--transition-base);
            cursor: pointer;
        }
        .latest-side-item:hover {
            border-color: var(--border-green);
            box-shadow: var(--shadow-glow-green);
            transform: translateX(4px);
        }
        .latest-side-item .side-img {
            width: 80px;
            height: 60px;
            border-radius: var(--radius-sm);
            overflow: hidden;
            flex-shrink: 0;
            background: var(--bg-secondary);
        }
        .latest-side-item .side-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .latest-side-item .side-info h4 {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-heading);
            line-height: 1.4;
            margin-bottom: 4px;
        }
        .latest-side-item .side-info .side-date {
            font-size: 0.75rem;
            color: var(--text-muted);
        }

        /* ============ News List Grid ============ */
        .news-list-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-md);
        }
        .news-card {
            background: var(--bg-card);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-default);
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
        }
        .news-card:hover {
            border-color: var(--border-purple);
            box-shadow: var(--shadow-glow-purple), var(--shadow-default);
            transform: translateY(-4px);
        }
        .news-card .news-img-wrap {
            position: relative;
            aspect-ratio: 16/10;
            overflow: hidden;
            background: var(--bg-secondary);
        }
        .news-card .news-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-base);
        }
        .news-card:hover .news-img-wrap img {
            transform: scale(1.05);
        }
        .news-card .news-img-wrap::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 50%, rgba(13, 6, 24, 0.8) 100%);
            pointer-events: none;
        }
        .news-card .news-cat {
            position: absolute;
            top: 12px;
            left: 12px;
            background: var(--amber-orange);
            color: var(--text-dark);
            padding: 3px 10px;
            border-radius: 4px;
            font-size: 0.7rem;
            font-weight: 700;
            z-index: 2;
        }
        .news-card .news-body {
            padding: var(--spacing-md);
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .news-card .news-body h3 {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text-heading);
            line-height: 1.45;
            margin-bottom: var(--spacing-xs);
            transition: color var(--transition-fast);
        }
        .news-card:hover .news-body h3 {
            color: var(--neon-green);
        }
        .news-card .news-body p {
            color: var(--text-muted);
            font-size: 0.875rem;
            line-height: 1.7;
            margin-bottom: var(--spacing-sm);
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-card .news-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: var(--spacing-xs);
            font-size: 0.75rem;
            color: var(--text-muted);
        }
        .news-card .news-footer .read-more {
            color: var(--electric-purple);
            font-weight: 500;
            font-size: 0.8rem;
            transition: color var(--transition-fast);
        }
        .news-card:hover .news-footer .read-more {
            color: var(--neon-green);
        }
        .list-more {
            text-align: center;
            margin-top: var(--spacing-lg);
        }
        .list-more .btn-outline {
            background: transparent;
            border: 1px solid var(--border-green);
            color: var(--neon-green);
            padding: 10px 28px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.9rem;
            transition: all var(--transition-base);
            display: inline-block;
            text-decoration: none;
        }
        .list-more .btn-outline:hover {
            background: rgba(62, 255, 139, 0.1);
            box-shadow: var(--shadow-glow-green);
            transform: translateY(-2px);
            color: var(--neon-green);
        }

        /* ============ Tags ============ */
        .tags-container {
            display: flex;
            flex-wrap: wrap;
            gap: var(--spacing-xs);
        }
        .tag-pill {
            padding: 8px 18px;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 500;
            border: 1px solid var(--border-dark);
            color: var(--text-muted);
            transition: all var(--transition-fast);
            background: transparent;
        }
        .tag-pill:hover {
            border-color: var(--neon-green);
            color: var(--neon-green);
            background: rgba(62, 255, 139, 0.08);
            box-shadow: var(--shadow-glow-green);
        }
        .tag-pill.hot {
            border-color: var(--amber-orange);
            color: var(--amber-orange);
            background: rgba(255, 179, 71, 0.08);
        }
        .tag-pill.hot:hover {
            background: rgba(255, 179, 71, 0.15);
            color: var(--amber-orange);
            border-color: var(--amber-orange);
            box-shadow: var(--amber-orange-glow);
        }

        /* ============ Stats Section ============ */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--spacing-md);
        }
        .stat-card {
            background: var(--bg-card);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-md);
            padding: var(--spacing-lg) var(--spacing-md);
            text-align: center;
            transition: all var(--transition-base);
        }
        .stat-card:hover {
            border-color: var(--border-green);
            box-shadow: var(--shadow-glow-green);
            transform: translateY(-3px);
        }
        .stat-card .stat-value {
            font-family: var(--font-mono);
            font-size: 2.4rem;
            font-weight: 700;
            color: var(--neon-green);
            line-height: 1.2;
        }
        .stat-card .stat-desc {
            color: var(--text-muted);
            font-size: 0.875rem;
            margin-top: var(--spacing-xs);
        }
        .stat-card .stat-trend {
            display: inline-block;
            margin-top: var(--spacing-xs);
            padding: 2px 10px;
            border-radius: 12px;
            font-size: 0.75rem;
            font-weight: 600;
            background: rgba(62, 255, 139, 0.1);
            color: var(--neon-green);
        }

        /* ============ Subscribe ============ */
        .subscribe-panel {
            background: var(--bg-card);
            border: 1px solid var(--border-purple);
            border-radius: var(--radius-lg);
            padding: var(--spacing-xl);
            box-shadow: var(--shadow-default), var(--shadow-glow-purple);
            display: flex;
            align-items: center;
            gap: var(--spacing-xl);
            flex-wrap: wrap;
        }
        .subscribe-panel .subscribe-text {
            flex: 1 1 50%;
            min-width: 280px;
        }
        .subscribe-panel .subscribe-text h3 {
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: var(--spacing-sm);
        }
        .subscribe-panel .subscribe-text p {
            color: var(--text-muted);
            font-size: 0.95rem;
        }
        .subscribe-form {
            flex: 0 1 380px;
            display: flex;
            gap: var(--spacing-xs);
        }
        .subscribe-form input {
            flex: 1;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-dark);
            background: rgba(13, 6, 24, 0.7);
            color: var(--text-heading);
            font-size: 0.9rem;
            transition: all var(--transition-fast);
        }
        .subscribe-form input::placeholder {
            color: rgba(143, 138, 168, 0.7);
        }
        .subscribe-form input:focus {
            outline: none;
            border-color: var(--neon-green);
            box-shadow: 0 0 0 3px rgba(62, 255, 139, 0.15);
        }
        .subscribe-form .btn {
            flex-shrink: 0;
        }

        /* ============ Related Reading ============ */
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-md);
        }
        .related-card {
            background: var(--bg-card);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-md);
            padding: var(--spacing-md);
            transition: all var(--transition-base);
        }
        .related-card:hover {
            border-color: var(--border-green);
            box-shadow: var(--shadow-glow-green);
            transform: translateY(-3px);
        }
        .related-card .related-tag {
            display: inline-block;
            padding: 2px 10px;
            border-radius: 4px;
            font-size: 0.7rem;
            font-weight: 600;
            margin-bottom: var(--spacing-xs);
            background: rgba(62, 255, 139, 0.1);
            color: var(--neon-green);
        }
        .related-card h4 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-heading);
            line-height: 1.45;
            margin-bottom: var(--spacing-xs);
        }
        .related-card .related-date {
            font-size: 0.75rem;
            color: var(--text-muted);
        }

        /* ============ CTA Section ============ */
        .cta-section {
            padding: var(--spacing-2xl) 0;
            position: relative;
            overflow: hidden;
            background:
                linear-gradient(135deg, rgba(13, 6, 24, 0.95) 0%, rgba(20, 10, 36, 0.9) 100%);
            border-top: 1px solid rgba(62, 255, 139, 0.15);
            border-bottom: 1px solid rgba(62, 255, 139, 0.15);
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image:
                linear-gradient(rgba(62, 255, 139, 0.03) 1px, transparent 1px),
                linear-gradient(90deg, rgba(62, 255, 139, 0.03) 1px, transparent 1px);
            background-size: 32px 32px;
            pointer-events: none;
        }
        .cta-inner {
            position: relative;
            text-align: center;
            max-width: 720px;
            margin: 0 auto;
        }
        .cta-inner h2 {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--text-heading);
            line-height: 1.3;
            margin-bottom: var(--spacing-md);
        }
        .cta-inner p {
            color: var(--text-muted);
            font-size: 1.05rem;
            margin-bottom: var(--spacing-lg);
        }
        .cta-actions {
            display: flex;
            gap: var(--spacing-sm);
            justify-content: center;
            flex-wrap: wrap;
        }

        /* ============ Footer ============ */
        .site-footer {
            background: rgba(8, 3, 18, 0.95);
            border-top: 1px solid rgba(180, 77, 255, 0.15);
            padding: var(--spacing-2xl) 0 var(--spacing-md);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1.5fr;
            gap: var(--spacing-xl);
            margin-bottom: var(--spacing-xl);
        }
        .footer-brand-col .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: var(--spacing-sm);
        }
        .footer-brand-col .footer-logo .logo-icon {
            width: 34px;
            height: 34px;
            font-size: 17px;
        }
        .footer-brand-col .footer-logo span {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-heading);
        }
        .footer-brand-desc {
            color: var(--text-muted);
            font-size: 0.875rem;
            line-height: 1.8;
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: var(--spacing-sm);
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul li a {
            color: var(--text-muted);
            font-size: 0.875rem;
            transition: color var(--transition-fast);
        }
        .footer-col ul li a:hover {
            color: var(--neon-green);
        }
        .footer-subscribe p {
            color: var(--text-muted);
            font-size: 0.85rem;
            line-height: 1.7;
            margin-bottom: var(--spacing-sm);
        }
        .footer-input-group {
            display: flex;
            gap: var(--spacing-xs);
        }
        .footer-input {
            flex: 1;
            padding: 10px 14px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-dark);
            background: rgba(13, 6, 24, 0.6);
            color: var(--text-heading);
            font-size: 0.85rem;
            transition: all var(--transition-fast);
        }
        .footer-input::placeholder {
            color: rgba(143, 138, 168, 0.6);
        }
        .footer-input:focus {
            outline: none;
            border-color: var(--neon-green);
            box-shadow: 0 0 0 3px rgba(62, 255, 139, 0.1);
        }
        .footer-bottom {
            border-top: 1px solid rgba(180, 77, 255, 0.1);
            padding-top: var(--spacing-md);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: var(--spacing-sm);
            flex-wrap: wrap;
            font-size: 0.8rem;
            color: var(--text-muted);
        }
        .footer-bottom-links {
            display: flex;
            align-items: center;
            gap: var(--spacing-xs);
        }
        .footer-bottom-links a {
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }
        .footer-bottom-links a:hover {
            color: var(--neon-green);
        }

        /* ============ Mobile Nav Overlay ============ */
        .nav-overlay {
            display: none;
            position: fixed;
            inset: 0;
            z-index: 1050;
            background: rgba(13, 6, 24, 0.97);
            flex-direction: column;
            padding: calc(var(--header-height) + 24px) var(--spacing-md) var(--spacing-lg);
            gap: var(--spacing-sm);
            overflow-y: auto;
        }
        .nav-overlay.open {
            display: flex;
        }
        .nav-overlay a {
            display: block;
            padding: 14px 8px;
            font-size: 1.1rem;
            font-weight: 500;
            color: var(--text-heading);
            border-bottom: 1px solid rgba(180, 77, 255, 0.1);
            transition: all var(--transition-fast);
        }
        .nav-overlay a:hover {
            color: var(--neon-green);
            background: rgba(62, 255, 139, 0.05);
            padding-left: 16px;
        }
        .nav-overlay a.active {
            color: var(--neon-green);
            border-bottom-color: var(--neon-green);
        }
        .nav-overlay .overlay-actions {
            display: flex;
            gap: var(--spacing-xs);
            margin-top: var(--spacing-md);
            flex-wrap: wrap;
        }
        .nav-overlay .overlay-actions .btn {
            flex: 1;
            min-width: 120px;
        }

        /* ============ Responsive ============ */
        @media (max-width: 1023px) {
            .main-nav {
                gap: 4px;
            }
            .main-nav a {
                padding: 8px 10px;
                font-size: 0.875rem;
            }
            .category-header-text h1 {
                font-size: 2.2rem;
            }
            .news-list-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .latest-highlight {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: var(--spacing-lg);
            }
        }

        @media (max-width: 767px) {
            :root {
                --header-height: 60px;
                --spacing-xl: 48px;
                --spacing-2xl: 64px;
            }
            .main-nav {
                display: none;
            }
            .header-actions {
                display: none;
            }
            .nav-toggle {
                display: flex;
            }
            .category-header {
                padding: var(--spacing-md) 0 var(--spacing-lg);
            }
            .category-header-inner {
                gap: var(--spacing-md);
            }
            .category-header-text h1 {
                font-size: 1.8rem;
            }
            .category-header-stats {
                grid-template-columns: repeat(3, 1fr);
                width: 100%;
            }
            .section {
                padding: var(--spacing-lg) 0;
            }
            .section-head h2 {
                font-size: 1.5rem;
            }
            .news-list-grid {
                grid-template-columns: 1fr;
            }
            .latest-highlight {
                grid-template-columns: 1fr;
                gap: var(--spacing-md);
            }
            .latest-main-card .card-body {
                padding: var(--spacing-md);
            }
            .latest-side-item {
                padding: var(--spacing-sm);
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: var(--spacing-sm);
            }
            .stat-card {
                padding: var(--spacing-md) var(--spacing-sm);
            }
            .stat-card .stat-value {
                font-size: 1.8rem;
            }
            .related-grid {
                grid-template-columns: 1fr;
            }
            .subscribe-panel {
                flex-direction: column;
                gap: var(--spacing-md);
                padding: var(--spacing-lg);
            }
            .subscribe-form {
                width: 100%;
                flex-direction: column;
            }
            .cta-inner h2 {
                font-size: 1.6rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: var(--spacing-lg);
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: var(--spacing-xs);
            }
            .tag-pill {
                padding: 6px 14px;
                font-size: 0.78rem;
            }
        }

        @media (max-width: 519px) {
            .category-header-text h1 {
                font-size: 1.5rem;
            }
            .category-header-stats {
                grid-template-columns: 1fr;
                gap: 4px;
            }
            .stat-mini {
                display: flex;
                align-items: center;
                justify-content: space-between;
                gap: var(--spacing-sm);
                padding: 6px 0;
            }
            .stat-mini .stat-num {
                font-size: 1.3rem;
            }
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .latest-side-item {
                flex-direction: column;
                align-items: flex-start;
            }
            .latest-side-item .side-img {
                width: 100%;
                height: auto;
                aspect-ratio: 16/9;
            }
            .cta-actions {
                flex-direction: column;
            }
            .cta-actions .btn {
                width: 100%;
            }
        }