/* roulang page: index */
:root {
            --primary-900: #0E1A14;
            --primary-800: #12211A;
            --primary-700: #14201A;
            --accent-lime: #B8F03D;
            --accent-cyan: #35E0C0;
            --accent-gold: #E7B45C;
            --text-primary: #F5F7F2;
            --text-secondary: #C2CFC4;
            --text-muted: #8FA69A;
            --border-light: rgba(230, 255, 235, 0.14);
            --border-strong: rgba(230, 255, 235, 0.22);
            --bg-panel: #14201A;
            --bg-gradient-start: #12211A;
            --bg-gradient-end: #0B1210;
            --shadow-card: 0 8px 24px rgba(0, 0, 0, 0.25);
            --shadow-card-hover: 0 18px 42px rgba(0, 0, 0, 0.38);
            --radius-card: 20px;
            --radius-btn: 999px;
            --radius-input: 12px;
            --radius-small: 14px;
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', 'Inter', system-ui, -apple-system, sans-serif;
            --transition-fast: 0.2s ease;
            --transition-base: 0.25s ease;
            --transition-slow: 0.3s ease;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--primary-900);
            color: var(--text-primary);
            line-height: 1.8;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

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

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

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

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        @media (max-width: 640px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

        /* ===== Navigation ===== */
        #site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            padding: 16px 0;
            background: rgba(14, 26, 20, 0.72);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border-light);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.18);
            transition: background var(--transition-base), box-shadow var(--transition-base), padding var(--transition-base);
        }

        #site-header.scrolled {
            background: var(--primary-900);
            box-shadow: 0 8px 28px rgba(0, 0, 0, 0.38);
            padding: 10px 0;
        }

        #site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            flex-wrap: wrap;
        }

        .nav-brand {
            font-weight: 800;
            font-size: 1.125rem;
            letter-spacing: 0.02em;
            white-space: nowrap;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 8px;
            line-height: 1.3;
        }

        .nav-brand .brand-icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--accent-lime);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary-900);
            font-size: 1.15rem;
            flex-shrink: 0;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
        }

        .nav-links a {
            font-size: 0.925rem;
            font-weight: 500;
            color: var(--text-secondary);
            letter-spacing: 0.01em;
            transition: color var(--transition-fast);
            position: relative;
            white-space: nowrap;
        }

        .nav-links a:hover,
        .nav-links a.active {
            color: var(--accent-lime);
        }

        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 0;
            right: 0;
            height: 2px;
            background: var(--accent-lime);
            border-radius: 2px;
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .nav-search-btn {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: transparent;
            border: 1px solid var(--border-light);
            color: var(--text-secondary);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: all var(--transition-fast);
            font-size: 1rem;
        }

        .nav-search-btn:hover {
            background: rgba(184, 240, 61, 0.1);
            border-color: var(--accent-lime);
            color: var(--accent-lime);
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 20px;
            border-radius: var(--radius-btn);
            background: var(--accent-lime);
            color: var(--primary-900);
            font-weight: 700;
            font-size: 0.875rem;
            white-space: nowrap;
            transition: all var(--transition-fast);
            border: none;
            cursor: pointer;
        }

        .nav-cta:hover {
            background: #c5f755;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(184, 240, 61, 0.25);
        }

        .nav-cta:focus-visible {
            outline: 2px solid var(--accent-lime);
            outline-offset: 2px;
        }

        .nav-cta:active {
            transform: scale(0.97);
        }

        .hamburger {
            display: none;
            width: 44px;
            height: 44px;
            border-radius: 10px;
            background: transparent;
            border: 1px solid var(--border-light);
            color: var(--text-primary);
            align-items: center;
            justify-content: center;
            cursor: pointer;
            flex-direction: column;
            gap: 5px;
            transition: all var(--transition-fast);
        }

        .hamburger span {
            display: block;
            width: 20px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: all var(--transition-base);
        }

        .hamburger.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }

        .hamburger.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: var(--primary-900);
            z-index: 999;
            padding: 80px 24px 40px;
            flex-direction: column;
            gap: 8px;
            overflow-y: auto;
        }

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

        .mobile-menu a {
            display: block;
            padding: 16px 12px;
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text-secondary);
            border-bottom: 1px solid var(--border-light);
            transition: all var(--transition-fast);
            border-radius: 8px;
        }

        .mobile-menu a:hover,
        .mobile-menu a.active {
            color: var(--accent-lime);
            background: rgba(184, 240, 61, 0.08);
        }

        @media (max-width: 1024px) {
            .nav-links {
                gap: 18px;
            }

            .nav-links a {
                font-size: 0.85rem;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }

            .nav-cta {
                display: none;
            }

            .hamburger {
                display: flex;
            }

            #site-header .container {
                gap: 10px;
            }
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 13px 28px;
            border-radius: var(--radius-btn);
            font-weight: 700;
            font-size: 0.925rem;
            transition: all var(--transition-fast);
            border: none;
            cursor: pointer;
            text-align: center;
            min-height: 44px;
        }

        .btn:focus-visible {
            outline: 2px solid var(--accent-lime);
            outline-offset: 2px;
        }

        .btn:active {
            transform: scale(0.97);
        }

        .btn-primary {
            background: var(--accent-lime);
            color: var(--primary-900);
        }

        .btn-primary:hover {
            background: #c5f755;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(184, 240, 61, 0.3);
        }

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

        .btn-secondary:hover {
            background: rgba(184, 240, 61, 0.12);
            transform: translateY(-2px);
            box-shadow: 0 6px 18px rgba(184, 240, 61, 0.18);
        }

        .btn-cyan {
            background: var(--accent-cyan);
            color: var(--primary-900);
        }

        .btn-cyan:hover {
            background: #4ee8cb;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(53, 224, 192, 0.28);
        }

        /* ===== Section common ===== */
        .section {
            padding: 90px 0;
            position: relative;
            overflow: hidden;
        }

        .section-dark {
            background: var(--primary-800);
        }

        .section-darker {
            background: var(--bg-gradient-end);
        }

        .section-panel {
            background: var(--bg-panel);
            border-top: 1px solid var(--border-light);
            border-bottom: 1px solid var(--border-light);
        }

        .section-header {
            max-width: 720px;
            margin-bottom: 48px;
        }

        .section-header.center {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }

        .section-tag {
            display: inline-block;
            padding: 6px 16px;
            border-radius: 999px;
            background: rgba(184, 240, 61, 0.12);
            color: var(--accent-lime);
            font-size: 0.78rem;
            font-weight: 600;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            margin-bottom: 16px;
            border: 1px solid rgba(184, 240, 61, 0.2);
        }

        .section-title {
            font-size: 2.25rem;
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: 0.02em;
            color: var(--text-primary);
            margin-bottom: 16px;
        }

        .section-desc {
            font-size: 1rem;
            color: var(--text-secondary);
            line-height: 1.9;
            max-width: 680px;
        }

        .section-header.center .section-desc {
            margin-left: auto;
            margin-right: auto;
        }

        @media (max-width: 768px) {
            .section {
                padding: 56px 0;
            }

            .section-title {
                font-size: 1.625rem;
            }

            .section-header {
                margin-bottom: 32px;
            }
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 92vh;
            display: flex;
            align-items: center;
            padding: 140px 0 80px;
            background-image: linear-gradient(180deg, rgba(14, 26, 20, 0.88) 0%, rgba(14, 26, 20, 0.72) 50%, rgba(11, 18, 16, 0.95) 100%), url('/assets/images/4332610f060ec2c0.jpg');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: linear-gradient(rgba(184, 240, 61, 0.04) 1px, transparent 1px), linear-gradient(90deg, rgba(184, 240, 61, 0.04) 1px, transparent 1px);
            background-size: 48px 48px;
            pointer-events: none;
        }

        .hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(184, 240, 61, 0.08) 0%, transparent 55%), radial-gradient(ellipse at 75% 40%, rgba(53, 224, 192, 0.06) 0%, transparent 50%);
            pointer-events: none;
        }

        .hero .container {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 48px;
            align-items: center;
        }

        .hero-content h1 {
            font-size: 3.25rem;
            font-weight: 800;
            line-height: 1.18;
            letter-spacing: 0.03em;
            color: var(--text-primary);
            margin-bottom: 24px;
        }

        .hero-content h1 .highlight {
            color: var(--accent-lime);
            position: relative;
        }

        .hero-sub {
            font-size: 1.06rem;
            color: var(--text-secondary);
            line-height: 1.95;
            max-width: 560px;
            margin-bottom: 32px;
        }

        .hero-btns {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-bottom: 32px;
        }

        .hero-trust {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            align-items: center;
            color: var(--text-muted);
            font-size: 0.85rem;
        }

        .hero-trust-item {
            display: flex;
            align-items: center;
            gap: 7px;
        }

        .hero-trust-item i {
            color: var(--accent-cyan);
            font-size: 0.9rem;
        }

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

        .hero-card {
            background: rgba(20, 32, 26, 0.85);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            padding: 28px 24px;
            width: 100%;
            max-width: 420px;
            box-shadow: var(--shadow-card);
        }

        .hero-card .hc-label {
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--accent-cyan);
            letter-spacing: 0.1em;
            text-transform: uppercase;
            margin-bottom: 12px;
        }

        .hero-card .hc-title {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--text-primary);
        }

        .hc-stats {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 12px;
        }

        .hc-stat {
            background: rgba(184, 240, 61, 0.07);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-small);
            padding: 14px 16px;
            text-align: center;
        }

        .hc-stat .num {
            font-size: 1.65rem;
            font-weight: 800;
            color: var(--accent-lime);
            line-height: 1.3;
        }

        .hc-stat .label {
            font-size: 0.78rem;
            color: var(--text-muted);
        }

        @media (max-width: 1024px) {
            .hero .container {
                grid-template-columns: 1fr;
                gap: 36px;
            }

            .hero-content h1 {
                font-size: 2.5rem;
            }

            .hero-visual {
                justify-content: flex-start;
            }
        }

        @media (max-width: 640px) {
            .hero {
                min-height: auto;
                padding: 120px 0 56px;
            }

            .hero-content h1 {
                font-size: 1.875rem;
            }

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

        /* ===== Data strip ===== */
        .data-strip {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 12px;
        }

        .data-item {
            background: var(--bg-panel);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-small);
            padding: 22px 18px;
            text-align: center;
            transition: all var(--transition-fast);
        }

        .data-item:hover {
            border-color: rgba(184, 240, 61, 0.35);
            box-shadow: var(--shadow-card);
        }

        .data-item .num {
            font-size: 1.75rem;
            font-weight: 800;
            color: var(--accent-lime);
            line-height: 1.35;
        }

        .data-item .label {
            font-size: 0.84rem;
            color: var(--text-muted);
            margin-top: 6px;
        }

        @media (max-width: 1024px) {
            .data-strip {
                grid-template-columns: repeat(3, 1fr);
            }
        }

        @media (max-width: 640px) {
            .data-strip {
                grid-template-columns: repeat(2, 1fr);
                gap: 8px;
            }

            .data-item {
                padding: 16px 12px;
            }

            .data-item .num {
                font-size: 1.4rem;
            }
        }

        /* ===== Feature cards ===== */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .feature-card {
            background: var(--bg-panel);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            padding: 24px;
            box-shadow: var(--shadow-card);
            transition: all var(--transition-base);
            overflow: hidden;
            position: relative;
        }

        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
            border-color: rgba(184, 240, 61, 0.35);
        }

        .feature-card .fc-img {
            border-radius: var(--radius-small);
            overflow: hidden;
            margin-bottom: 16px;
        }

        .feature-card .fc-img img {
            width: 100%;
            height: 160px;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }

        .feature-card:hover .fc-img img {
            transform: scale(1.05);
        }

        .feature-card .fc-icon {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: rgba(184, 240, 61, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-lime);
            font-size: 1.1rem;
            margin-bottom: 12px;
        }

        .feature-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text-primary);
        }

        .feature-card .fc-specs {
            list-style: none;
            font-size: 0.86rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        .feature-card .fc-specs li {
            padding-left: 16px;
            position: relative;
            margin-bottom: 4px;
        }

        .feature-card .fc-specs li::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0.55em;
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--accent-cyan);
        }

        @media (max-width: 1024px) {
            .feature-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 640px) {
            .feature-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== Scene grid ===== */
        .scene-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .scene-card {
            background: var(--bg-panel);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: all var(--transition-base);
        }

        .scene-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
            border-color: rgba(53, 224, 192, 0.35);
        }

        .scene-card .sc-img {
            position: relative;
            overflow: hidden;
        }

        .scene-card .sc-img img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }

        .scene-card:hover .sc-img img {
            transform: scale(1.05);
        }

        .scene-card .sc-img .sc-badge {
            position: absolute;
            top: 14px;
            left: 14px;
            background: rgba(14, 26, 20, 0.85);
            backdrop-filter: blur(8px);
            padding: 6px 14px;
            border-radius: 999px;
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--accent-lime);
            border: 1px solid rgba(184, 240, 61, 0.3);
        }

        .scene-card .sc-body {
            padding: 20px;
        }

        .scene-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-primary);
        }

        .scene-card p {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.75;
        }

        @media (max-width: 1024px) {
            .scene-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 640px) {
            .scene-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== Demo section ===== */
        .demo-wrap {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .demo-text h3 {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--text-primary);
        }

        .demo-text p {
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.9;
            margin-bottom: 20px;
        }

        .demo-text .demo-points {
            list-style: none;
        }

        .demo-text .demo-points li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            margin-bottom: 10px;
            font-size: 0.9rem;
            color: var(--text-secondary);
        }

        .demo-text .demo-points li i {
            color: var(--accent-cyan);
            margin-top: 4px;
            flex-shrink: 0;
        }

        .demo-visual {
            background: var(--bg-panel);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            overflow: hidden;
            position: relative;
            box-shadow: var(--shadow-card);
        }

        .demo-visual img {
            width: 100%;
            height: 320px;
            object-fit: cover;
        }

        .demo-overlay {
            position: absolute;
            bottom: 16px;
            left: 16px;
            right: 16px;
            background: rgba(14, 26, 20, 0.88);
            backdrop-filter: blur(10px);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-small);
            padding: 14px 18px;
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        .demo-overlay .dl-item {
            font-size: 0.78rem;
            color: var(--text-muted);
        }

        .demo-overlay .dl-item strong {
            display: block;
            font-size: 1.05rem;
            color: var(--accent-lime);
        }

        @media (max-width: 768px) {
            .demo-wrap {
                grid-template-columns: 1fr;
                gap: 28px;
            }
        }

        /* ===== Comparison ===== */
        .compare-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }

        .compare-card {
            background: var(--bg-panel);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            padding: 28px 24px;
            box-shadow: var(--shadow-card);
            transition: all var(--transition-fast);
        }

        .compare-card:hover {
            border-color: rgba(184, 240, 61, 0.3);
            box-shadow: var(--shadow-card-hover);
        }

        .compare-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .compare-card h3 i {
            color: var(--accent-gold);
        }

        .compare-list {
            list-style: none;
            font-size: 0.88rem;
            color: var(--text-secondary);
        }

        .compare-list li {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 10px 0;
            border-bottom: 1px solid var(--border-light);
        }

        .compare-list li:last-child {
            border-bottom: none;
        }

        .compare-list li span:last-child {
            font-weight: 600;
            color: var(--text-primary);
        }

        @media (max-width: 768px) {
            .compare-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== Case cards ===== */
        .case-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .case-card {
            background: var(--bg-panel);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            padding: 24px;
            box-shadow: var(--shadow-card);
            transition: all var(--transition-fast);
        }

        .case-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-card-hover);
            border-color: rgba(231, 180, 92, 0.3);
        }

        .case-card .cc-tag {
            display: inline-block;
            padding: 4px 12px;
            border-radius: 999px;
            background: rgba(231, 180, 92, 0.15);
            color: var(--accent-gold);
            font-size: 0.74rem;
            font-weight: 600;
            margin-bottom: 12px;
        }

        .case-card h3 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text-primary);
        }

        .case-card p {
            font-size: 0.86rem;
            color: var(--text-secondary);
            line-height: 1.75;
            margin-bottom: 12px;
        }

        .case-card .cc-quote {
            font-size: 0.82rem;
            color: var(--text-muted);
            font-style: italic;
            border-left: 3px solid var(--accent-gold);
            padding-left: 12px;
        }

        @media (max-width: 1024px) {
            .case-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 640px) {
            .case-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== Pricing ===== */
        .pricing-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
            align-items: stretch;
        }

        .pricing-card {
            background: var(--bg-panel);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            padding: 28px 24px;
            box-shadow: var(--shadow-card);
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
            position: relative;
        }

        .pricing-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
        }

        .pricing-card.featured {
            border-color: var(--accent-lime);
            box-shadow: 0 0 0 1px var(--accent-lime), var(--shadow-card);
        }

        .pricing-card.featured .pc-badge {
            position: absolute;
            top: -12px;
            right: 20px;
            background: var(--accent-lime);
            color: var(--primary-900);
            font-size: 0.74rem;
            font-weight: 700;
            padding: 4px 14px;
            border-radius: 999px;
            letter-spacing: 0.04em;
        }

        .pricing-card .pc-name {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-primary);
        }

        .pricing-card .pc-price {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--accent-lime);
            line-height: 1.3;
            margin-bottom: 4px;
        }

        .pricing-card .pc-price span {
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-muted);
        }

        .pricing-card .pc-desc {
            font-size: 0.86rem;
            color: var(--text-secondary);
            margin-bottom: 16px;
        }

        .pricing-card .pc-features {
            list-style: none;
            font-size: 0.86rem;
            color: var(--text-secondary);
            flex: 1;
            margin-bottom: 20px;
        }

        .pricing-card .pc-features li {
            padding: 7px 0;
            display: flex;
            align-items: flex-start;
            gap: 8px;
        }

        .pricing-card .pc-features li i {
            color: var(--accent-cyan);
            margin-top: 4px;
            flex-shrink: 0;
        }

        @media (max-width: 1024px) {
            .pricing-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 640px) {
            .pricing-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== Review wall ===== */
        .review-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }

        .review-card {
            background: var(--bg-panel);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            padding: 18px;
            box-shadow: var(--shadow-card);
            transition: all var(--transition-fast);
        }

        .review-card:hover {
            border-color: rgba(184, 240, 61, 0.25);
            transform: translateY(-2px);
        }

        .review-card .rc-stars {
            color: var(--accent-gold);
            font-size: 0.8rem;
            margin-bottom: 8px;
            letter-spacing: 2px;
        }

        .review-card .rc-text {
            font-size: 0.84rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 10px;
        }

        .review-card .rc-user {
            font-size: 0.76rem;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .review-card .rc-user .avatar {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(53, 224, 192, 0.2);
            color: var(--accent-cyan);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.7rem;
            font-weight: 700;
        }

        @media (max-width: 1024px) {
            .review-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 640px) {
            .review-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== Word of mouth ===== */
        .wom-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .wom-card {
            background: var(--bg-panel);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            padding: 24px;
            box-shadow: var(--shadow-card);
            transition: all var(--transition-fast);
        }

        .wom-card:hover {
            border-color: rgba(53, 224, 192, 0.3);
            transform: translateY(-2px);
        }

        .wom-card .wom-metric {
            font-size: 2.1rem;
            font-weight: 800;
            color: var(--accent-cyan);
            line-height: 1.3;
        }

        .wom-card .wom-label {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin-bottom: 10px;
        }

        .wom-card .wom-note {
            font-size: 0.82rem;
            color: var(--text-muted);
            line-height: 1.65;
        }

        @media (max-width: 768px) {
            .wom-grid {
                grid-template-columns: 1fr;
                gap: 12px;
            }
        }

        /* ===== CMS news list ===== */
        .news-layout {
            display: grid;
            grid-template-columns: 1.5fr 1fr;
            gap: 28px;
        }

        .news-main {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .news-card {
            display: flex;
            gap: 16px;
            background: var(--bg-panel);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-small);
            padding: 16px 18px;
            box-shadow: var(--shadow-card);
            transition: all var(--transition-fast);
            align-items: center;
        }

        .news-card:hover {
            border-color: rgba(184, 240, 61, 0.3);
            transform: translateY(-2px);
            box-shadow: var(--shadow-card-hover);
        }

        .news-card .nc-thumb {
            width: 96px;
            height: 72px;
            border-radius: 8px;
            overflow: hidden;
            flex-shrink: 0;
        }

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

        .news-card .nc-body {
            flex: 1;
            min-width: 0;
        }

        .news-card .nc-title {
            font-size: 0.92rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 4px;
            display: -webkit-box;
            -webkit-line-clamp: 1;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-card .nc-meta {
            font-size: 0.76rem;
            color: var(--text-muted);
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }

        .news-card .nc-meta span {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .news-side {
            background: var(--bg-panel);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            padding: 20px;
            box-shadow: var(--shadow-card);
        }

        .news-side h3 {
            font-size: 0.95rem;
            font-weight: 700;
            margin-bottom: 14px;
            color: var(--text-primary);
        }

        .news-side-list {
            list-style: none;
            font-size: 0.84rem;
            color: var(--text-secondary);
        }

        .news-side-list li {
            padding: 10px 0;
            border-bottom: 1px solid var(--border-light);
            display: flex;
            gap: 8px;
            align-items: flex-start;
        }

        .news-side-list li:last-child {
            border-bottom: none;
        }

        .news-side-list li i {
            color: var(--accent-cyan);
            margin-top: 5px;
            flex-shrink: 0;
            font-size: 0.65rem;
        }

        .news-empty {
            padding: 36px;
            text-align: center;
            color: var(--text-muted);
            font-size: 0.9rem;
            background: var(--bg-panel);
            border: 1px dashed var(--border-light);
            border-radius: var(--radius-small);
        }

        @media (max-width: 768px) {
            .news-layout {
                grid-template-columns: 1fr;
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
            max-width: 820px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--bg-panel);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-small);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: all var(--transition-fast);
        }

        .faq-item:hover {
            border-color: rgba(184, 240, 61, 0.22);
        }

        .faq-item summary {
            padding: 18px 20px;
            cursor: pointer;
            font-weight: 700;
            font-size: 0.95rem;
            color: var(--text-primary);
            list-style: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            user-select: none;
            transition: all var(--transition-fast);
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(184, 240, 61, 0.1);
            color: var(--accent-lime);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.85rem;
            flex-shrink: 0;
            transition: all var(--transition-fast);
        }

        .faq-item[open] summary .faq-icon {
            transform: rotate(45deg);
            background: rgba(184, 240, 61, 0.2);
        }

        .faq-item .faq-answer {
            padding: 0 20px 20px;
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.85;
        }

        .faq-item[open] {
            background: var(--primary-700);
            border-color: rgba(184, 240, 61, 0.25);
        }

        /* ===== Quality strip ===== */
        .quality-strip {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .quality-item {
            text-align: center;
            padding: 28px 20px;
            background: var(--bg-panel);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            transition: all var(--transition-fast);
        }

        .quality-item:hover {
            border-color: rgba(184, 240, 61, 0.3);
            box-shadow: var(--shadow-card);
        }

        .quality-item .qi-icon {
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: rgba(184, 240, 61, 0.1);
            color: var(--accent-lime);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            margin: 0 auto 14px;
            border: 1px solid rgba(184, 240, 61, 0.2);
        }

        .quality-item h3 {
            font-size: 0.95rem;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--text-primary);
        }

        .quality-item p {
            font-size: 0.82rem;
            color: var(--text-muted);
            line-height: 1.65;
        }

        @media (max-width: 1024px) {
            .quality-strip {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 640px) {
            .quality-strip {
                grid-template-columns: 1fr;
            }
        }

        /* ===== Form ===== */
        .form-wrap {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
            background: var(--bg-panel);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            padding: 36px 32px;
            box-shadow: var(--shadow-card);
        }

        .form-info h3 {
            font-size: 1.4rem;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--text-primary);
        }

        .form-info p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.8;
        }

        .form-fields {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .form-field input,
        .form-field textarea {
            width: 100%;
            background: var(--primary-900);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-input);
            padding: 13px 16px;
            color: var(--text-primary);
            font-size: 0.9rem;
            outline: none;
            transition: all var(--transition-fast);
        }

        .form-field input:focus,
        .form-field textarea:focus {
            border-color: var(--accent-lime);
            box-shadow: 0 0 0 3px rgba(184, 240, 61, 0.12);
        }

        .form-field input::placeholder,
        .form-field textarea::placeholder {
            color: var(--text-muted);
        }

        .form-field textarea {
            min-height: 90px;
            resize: vertical;
        }

        .form-privacy {
            font-size: 0.72rem;
            color: var(--text-muted);
            line-height: 1.6;
            margin-top: 4px;
        }

        @media (max-width: 768px) {
            .form-wrap {
                grid-template-columns: 1fr;
                padding: 24px 20px;
                gap: 24px;
            }
        }

        /* ===== CTA band ===== */
        .cta-band {
            background: var(--primary-800);
            border-top: 1px solid var(--border-light);
            border-bottom: 1px solid var(--border-light);
            padding: 72px 0;
            position: relative;
            overflow: hidden;
        }

        .cta-band::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 50% 50%, rgba(184, 240, 61, 0.08) 0%, transparent 60%);
            pointer-events: none;
        }

        .cta-band .container {
            position: relative;
            z-index: 1;
            text-align: center;
        }

        .cta-band h2 {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 16px;
            color: var(--text-primary);
        }

        .cta-band p {
            font-size: 0.95rem;
            color: var(--text-secondary);
            margin-bottom: 28px;
            max-width: 560px;
            margin-left: auto;
            margin-right: auto;
        }

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

        @media (max-width: 640px) {
            .cta-band {
                padding: 48px 0;
            }

            .cta-band h2 {
                font-size: 1.5rem;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-gradient-end);
            border-top: 1px solid var(--border-light);
            padding: 56px 0 28px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 36px;
            margin-bottom: 36px;
        }

        .footer-brand h3 {
            font-size: 1.1rem;
            font-weight: 800;
            margin-bottom: 12px;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .footer-brand h3 .fb-icon {
            width: 32px;
            height: 32px;
            border-radius: 8px;
            background: var(--accent-lime);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary-900);
            font-size: 0.9rem;
        }

        .footer-brand p {
            font-size: 0.84rem;
            color: var(--text-muted);
            line-height: 1.75;
        }

        .footer-col h4 {
            font-size: 0.88rem;
            font-weight: 700;
            margin-bottom: 14px;
            color: var(--text-secondary);
            letter-spacing: 0.04em;
        }

        .footer-col ul {
            list-style: none;
            font-size: 0.84rem;
            color: var(--text-muted);
        }

        .footer-col ul li {
            margin-bottom: 8px;
        }

        .footer-col ul li a {
            color: var(--text-muted);
            transition: all var(--transition-fast);
        }

        .footer-col ul li a:hover {
            color: var(--accent-lime);
            text-decoration: underline;
        }

        .footer-bottom {
            border-top: 1px solid var(--border-light);
            padding-top: 20px;
            text-align: center;
            font-size: 0.76rem;
            color: var(--text-muted);
        }

        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 640px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
        }

        /* ===== Misc ===== */
        .divider {
            height: 1px;
            background: var(--border-light);
            border: none;
        }

        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                animation-duration: 0.01ms !important;
                transition-duration: 0.01ms !important;
                scroll-behavior: auto !important;
            }
        }

/* roulang page: category1 */
:root {
            --primary-900: #0E1A14;
            --primary-800: #12211A;
            --primary-700: #14201A;
            --accent-lime: #B8F03D;
            --accent-cyan: #35E0C0;
            --accent-gold: #E7B45C;
            --text-primary: #F5F7F2;
            --text-secondary: #C2CFC4;
            --text-muted: #8FA69A;
            --border-light: rgba(230, 255, 235, 0.14);
            --border-strong: rgba(230, 255, 235, 0.22);
            --bg-panel: #14201A;
            --bg-gradient-start: #12211A;
            --bg-gradient-end: #0B1210;
            --shadow-card: 0 8px 24px rgba(0, 0, 0, 0.25);
            --shadow-card-hover: 0 18px 42px rgba(0, 0, 0, 0.38);
            --radius-card: 20px;
            --radius-btn: 999px;
            --radius-input: 12px;
            --radius-small: 14px;
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', 'Inter', system-ui, -apple-system, sans-serif;
            --transition-fast: 0.2s ease;
            --transition-base: 0.25s ease;
            --transition-slow: 0.3s ease;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--primary-900);
            color: var(--text-primary);
            line-height: 1.8;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

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

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

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

        ul,
        ol {
            list-style: none;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        /* ===== Navigation ===== */
        #site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            padding: 16px 0;
            background: rgba(14, 26, 20, 0.72);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border-light);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.18);
            transition: background var(--transition-base), box-shadow var(--transition-base), padding var(--transition-base);
        }

        #site-header.scrolled {
            background: var(--primary-900);
            box-shadow: 0 8px 28px rgba(0, 0, 0, 0.38);
            padding: 10px 0;
        }

        #site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            flex-wrap: wrap;
        }

        .nav-brand {
            font-weight: 800;
            font-size: 1.05rem;
            letter-spacing: 0.02em;
            white-space: nowrap;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 8px;
            line-height: 1.3;
        }

        .nav-brand .brand-icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--accent-lime);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary-900);
            font-size: 1.15rem;
            flex-shrink: 0;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
        }

        .nav-links a {
            font-size: 0.875rem;
            font-weight: 500;
            color: var(--text-secondary);
            letter-spacing: 0.01em;
            transition: color var(--transition-fast);
            position: relative;
            white-space: nowrap;
        }

        .nav-links a:hover,
        .nav-links a.active {
            color: var(--accent-lime);
        }

        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 0;
            right: 0;
            height: 2px;
            background: var(--accent-lime);
            border-radius: 2px;
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .nav-search-btn {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: transparent;
            border: 1px solid var(--border-light);
            color: var(--text-secondary);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: all var(--transition-fast);
            font-size: 1rem;
        }

        .nav-search-btn:hover {
            background: rgba(184, 240, 61, 0.1);
            border-color: var(--accent-lime);
            color: var(--accent-lime);
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 20px;
            border-radius: var(--radius-btn);
            background: var(--accent-lime);
            color: var(--primary-900);
            font-weight: 700;
            font-size: 0.875rem;
            white-space: nowrap;
            transition: all var(--transition-fast);
            border: none;
            cursor: pointer;
        }

        .nav-cta:hover {
            background: #c5f755;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(184, 240, 61, 0.25);
        }

        .nav-cta:focus-visible,
        .nav-search-btn:focus-visible {
            outline: 2px solid var(--accent-lime);
            outline-offset: 2px;
        }

        .nav-toggle {
            display: none;
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: transparent;
            border: 1px solid var(--border-light);
            color: var(--text-primary);
            font-size: 1.25rem;
            cursor: pointer;
            align-items: center;
            justify-content: center;
            transition: all var(--transition-fast);
        }

        .nav-toggle:hover {
            border-color: var(--accent-lime);
            color: var(--accent-lime);
        }

        /* ===== Category Hero ===== */
        .cat-hero {
            position: relative;
            min-height: 40vh;
            display: flex;
            align-items: center;
            padding: 140px 0 64px;
            background: linear-gradient(180deg, rgba(14, 26, 20, 0.88) 0%, rgba(14, 26, 20, 0.94) 100%),
                url('/assets/images/4332610f060ec2c0.jpg') center / cover no-repeat;
            border-bottom: 1px solid var(--border-light);
        }

        .cat-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 70% 30%, rgba(184, 240, 61, 0.08), transparent 55%);
            pointer-events: none;
        }

        .cat-hero .container {
            position: relative;
            z-index: 1;
        }

        .cat-breadcrumb {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 0.875rem;
            color: var(--text-muted);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }

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

        .cat-breadcrumb a:hover {
            color: var(--accent-lime);
        }

        .cat-breadcrumb i {
            font-size: 0.65rem;
            color: var(--text-muted);
        }

        .cat-hero h1 {
            font-size: clamp(1.85rem, 4vw, 2.85rem);
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: 0.01em;
            max-width: 820px;
            margin-bottom: 16px;
            color: var(--text-primary);
        }

        .cat-hero h1 .highlight {
            color: var(--accent-lime);
        }

        .cat-hero p {
            font-size: 1.0625rem;
            color: var(--text-secondary);
            max-width: 680px;
            line-height: 1.8;
            margin-bottom: 0;
        }

        .cat-hero .hero-tags {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
            margin-top: 22px;
        }

        .cat-hero .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 16px;
            border-radius: var(--radius-btn);
            background: rgba(184, 240, 61, 0.12);
            border: 1px solid rgba(184, 240, 61, 0.3);
            color: var(--accent-lime);
            font-size: 0.8rem;
            font-weight: 500;
        }

        /* ===== Common Section ===== */
        .section {
            padding: 80px 0;
            border-bottom: 1px solid var(--border-light);
        }

        .section:last-of-type {
            border-bottom: none;
        }

        .section-alt {
            background: var(--primary-800);
        }

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

        .section-title {
            font-size: clamp(1.5rem, 2.5vw, 2.1rem);
            font-weight: 700;
            letter-spacing: 0.01em;
            margin-bottom: 12px;
            color: var(--text-primary);
            line-height: 1.3;
        }

        .section-subtitle {
            font-size: 1rem;
            color: var(--text-secondary);
            max-width: 640px;
            line-height: 1.75;
        }

        .section-head {
            margin-bottom: 44px;
        }

        .section-head-center {
            text-align: center;
            margin-bottom: 48px;
        }

        .section-head-center .section-title {
            margin-left: auto;
            margin-right: auto;
        }

        .section-head-center .section-subtitle {
            margin-left: auto;
            margin-right: auto;
        }

        /* ===== Buttons ===== */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 28px;
            border-radius: var(--radius-btn);
            background: var(--accent-lime);
            color: var(--primary-900);
            font-weight: 700;
            font-size: 0.925rem;
            border: none;
            cursor: pointer;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .btn-primary:hover {
            background: #c5f755;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(184, 240, 61, 0.28);
        }

        .btn-primary:focus-visible {
            outline: 2px solid var(--accent-lime);
            outline-offset: 2px;
        }

        .btn-primary:active {
            transform: scale(0.97);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 26px;
            border-radius: var(--radius-btn);
            background: transparent;
            border: 1px solid var(--accent-lime);
            color: var(--accent-lime);
            font-weight: 600;
            font-size: 0.9rem;
            cursor: pointer;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .btn-secondary:hover {
            background: rgba(184, 240, 61, 0.08);
            border-color: #c5f755;
            color: #c5f755;
            transform: translateY(-2px);
        }

        .btn-secondary:focus-visible {
            outline: 2px solid var(--accent-lime);
            outline-offset: 2px;
        }

        .btn-secondary:active {
            transform: scale(0.97);
        }

        /* ===== Badge ===== */
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            padding: 4px 12px;
            border-radius: var(--radius-btn);
            font-size: 0.72rem;
            font-weight: 600;
            letter-spacing: 0.02em;
        }

        .badge-lime {
            background: rgba(184, 240, 61, 0.15);
            color: var(--accent-lime);
            border: 1px solid rgba(184, 240, 61, 0.3);
        }

        .badge-gold {
            background: rgba(231, 180, 92, 0.15);
            color: var(--accent-gold);
            border: 1px solid rgba(231, 180, 92, 0.3);
        }

        .badge-cyan {
            background: rgba(53, 224, 192, 0.15);
            color: var(--accent-cyan);
            border: 1px solid rgba(53, 224, 192, 0.3);
        }

        /* ===== Cards ===== */
        .card {
            background: var(--bg-panel);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            transition: all var(--transition-base);
            overflow: hidden;
        }

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

        .card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }

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

        .card-body {
            padding: 22px 20px 24px;
        }

        .card-body h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-primary);
            line-height: 1.4;
        }

        .card-body h3 a:hover {
            color: var(--accent-lime);
        }

        .card-body p {
            font-size: 0.875rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 14px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.75rem;
            color: var(--text-muted);
        }

        .card-meta i {
            font-size: 0.7rem;
            color: var(--accent-cyan);
        }

        /* ===== Parameter Strip ===== */
        .param-strip {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
            margin-top: 28px;
        }

        .param-item {
            background: rgba(184, 240, 61, 0.05);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-small);
            padding: 18px 20px;
            text-align: center;
        }

        .param-item .param-num {
            font-size: 1.75rem;
            font-weight: 800;
            color: var(--accent-lime);
            line-height: 1.2;
        }

        .param-item .param-label {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-top: 4px;
        }

        /* ===== Info List Cards ===== */
        .info-list {
            display: grid;
            gap: 14px;
        }

        .info-list-card {
            display: flex;
            align-items: center;
            gap: 18px;
            padding: 18px 20px;
            background: var(--bg-panel);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-small);
            transition: all var(--transition-base);
        }

        .info-list-card:hover {
            border-color: var(--accent-lime);
            box-shadow: var(--shadow-card);
            transform: translateX(4px);
        }

        .info-list-card .list-icon {
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: rgba(184, 240, 61, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-lime);
            font-size: 1.05rem;
            flex-shrink: 0;
        }

        .info-list-card .list-content {
            flex: 1;
            min-width: 0;
        }

        .info-list-card .list-content h4 {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 2px;
        }

        .info-list-card .list-content p {
            font-size: 0.8rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        .info-list-card .list-tag {
            font-size: 0.72rem;
            color: var(--accent-cyan);
            font-weight: 500;
            white-space: nowrap;
        }

        /* ===== Scene Cards ===== */
        .scene-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .scene-card {
            position: relative;
            border-radius: var(--radius-card);
            overflow: hidden;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-card);
            transition: all var(--transition-base);
            background: var(--bg-panel);
        }

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

        .scene-card .scene-img {
            width: 100%;
            height: 210px;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }

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

        .scene-card .scene-body {
            padding: 20px;
        }

        .scene-card .scene-body h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--text-primary);
        }

        .scene-card .scene-body p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 12px;
        }

        .scene-link {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--accent-cyan);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .scene-link:hover {
            color: #7bebd4;
        }

        /* ===== Table ===== */
        .compare-table-wrapper {
            overflow-x: auto;
            border-radius: var(--radius-card);
            border: 1px solid var(--border-light);
            background: var(--bg-panel);
            box-shadow: var(--shadow-card);
        }

        .compare-table {
            width: 100%;
            border-collapse: collapse;
            min-width: 700px;
        }

        .compare-table thead {
            background: rgba(184, 240, 61, 0.06);
        }

        .compare-table th {
            padding: 16px 20px;
            text-align: left;
            font-size: 0.82rem;
            font-weight: 700;
            color: var(--accent-lime);
            letter-spacing: 0.02em;
            border-bottom: 1px solid var(--border-light);
            white-space: nowrap;
        }

        .compare-table td {
            padding: 14px 20px;
            font-size: 0.85rem;
            color: var(--text-secondary);
            border-bottom: 1px solid var(--border-light);
            vertical-align: top;
            line-height: 1.6;
        }

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

        .compare-table tbody tr:hover {
            background: rgba(184, 240, 61, 0.03);
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 820px;
            display: grid;
            gap: 12px;
        }

        .faq-item {
            background: rgba(20, 32, 26, 0.7);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-small);
            overflow: hidden;
            transition: all var(--transition-base);
        }

        .faq-item[open] {
            background: var(--bg-panel);
            border-color: var(--border-strong);
        }

        .faq-item summary {
            padding: 18px 22px;
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-primary);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 14px;
            list-style: none;
            user-select: none;
            transition: color var(--transition-fast);
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary:hover {
            color: var(--accent-lime);
        }

        .faq-item summary .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(184, 240, 61, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.75rem;
            color: var(--accent-lime);
            transition: transform var(--transition-base);
        }

        .faq-item[open] summary .faq-icon {
            transform: rotate(45deg);
        }

        .faq-item .faq-answer {
            padding: 0 22px 20px;
            font-size: 0.875rem;
            color: var(--text-secondary);
            line-height: 1.8;
        }

        /* ===== Review Strip ===== */
        .review-strip {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .review-strip-card {
            padding: 22px 24px;
            background: var(--bg-panel);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            transition: all var(--transition-base);
        }

        .review-strip-card:hover {
            border-color: var(--border-strong);
            box-shadow: var(--shadow-card-hover);
        }

        .review-strip-card .review-stars {
            color: var(--accent-gold);
            font-size: 0.85rem;
            margin-bottom: 10px;
            letter-spacing: 2px;
        }

        .review-strip-card blockquote {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.75;
            font-style: normal;
            margin-bottom: 14px;
        }

        .review-strip-card .review-author {
            font-size: 0.78rem;
            color: var(--text-muted);
            font-weight: 500;
        }

        /* ===== CTA ===== */
        .cta-panel {
            background: linear-gradient(135deg, rgba(184, 240, 61, 0.08) 0%, rgba(53, 224, 192, 0.05) 100%);
            border: 1px solid var(--border-strong);
            border-radius: var(--radius-card);
            padding: 48px 40px;
            text-align: center;
            box-shadow: var(--shadow-card);
        }

        .cta-panel h2 {
            font-size: clamp(1.4rem, 2.2vw, 1.85rem);
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text-primary);
        }

        .cta-panel p {
            font-size: 0.95rem;
            color: var(--text-secondary);
            max-width: 520px;
            margin: 0 auto 24px;
            line-height: 1.7;
        }

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

        /* ===== Footer ===== */
        .site-footer {
            background: var(--primary-900);
            border-top: 1px solid var(--border-light);
            padding: 60px 0 28px;
            margin-top: 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 36px;
            margin-bottom: 40px;
        }

        .footer-brand h3 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 7px;
            margin-bottom: 14px;
        }

        .footer-brand .fb-icon {
            width: 32px;
            height: 32px;
            border-radius: 9px;
            background: var(--accent-lime);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: var(--primary-900);
            font-size: 0.9rem;
            flex-shrink: 0;
        }

        .footer-brand p {
            font-size: 0.84rem;
            color: var(--text-muted);
            line-height: 1.7;
            max-width: 300px;
        }

        .footer-col h4 {
            font-size: 0.88rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 14px;
            letter-spacing: 0.02em;
        }

        .footer-col ul li {
            margin-bottom: 8px;
        }

        .footer-col ul li a {
            font-size: 0.82rem;
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }

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

        .footer-bottom {
            border-top: 1px solid var(--border-light);
            padding-top: 22px;
            text-align: center;
        }

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

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .param-strip {
                grid-template-columns: repeat(2, 1fr);
            }
            .scene-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .review-strip {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
            .footer-brand p {
                max-width: 100%;
            }
        }

        @media (max-width: 768px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .section {
                padding: 56px 0;
            }
            #site-header .container {
                flex-wrap: nowrap;
            }
            .nav-links {
                position: fixed;
                top: 68px;
                left: 0;
                right: 0;
                flex-direction: column;
                align-items: flex-start;
                gap: 0;
                background: var(--primary-900);
                border-bottom: 1px solid var(--border-light);
                box-shadow: 0 12px 28px rgba(0, 0, 0, 0.4);
                padding: 12px 24px;
                display: none;
                max-height: calc(100vh - 68px);
                overflow-y: auto;
            }
            .nav-links.open {
                display: flex;
            }
            .nav-links a {
                display: block;
                width: 100%;
                padding: 14px 0;
                font-size: 1rem;
                border-bottom: 1px solid var(--border-light);
            }
            .nav-links a:last-child {
                border-bottom: none;
            }
            .nav-links a.active::after {
                bottom: 6px;
                left: 0;
                right: auto;
                width: 30px;
            }
            .nav-toggle {
                display: flex;
            }
            .nav-cta {
                padding: 9px 14px;
                font-size: 0.78rem;
                gap: 5px;
            }
            .nav-search-btn {
                width: 40px;
                height: 40px;
                font-size: 0.9rem;
            }
            .cat-hero {
                min-height: 34vh;
                padding: 110px 0 44px;
            }
            .param-strip {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }
            .param-item {
                padding: 14px 12px;
            }
            .param-item .param-num {
                font-size: 1.4rem;
            }
            .scene-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }
            .cta-panel {
                padding: 32px 20px;
            }
            .cta-panel .cta-actions {
                flex-direction: column;
                align-items: center;
            }
            .btn-primary,
            .btn-secondary {
                width: 100%;
                justify-content: center;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-brand {
                grid-column: auto;
            }
        }

        @media (max-width: 520px) {
            .cat-hero h1 {
                font-size: 1.6rem;
            }
            .cat-hero p {
                font-size: 0.9rem;
            }
            .cat-breadcrumb {
                font-size: 0.78rem;
                gap: 4px;
            }
            .hero-tags {
                gap: 6px;
            }
            .hero-tag {
                font-size: 0.7rem;
                padding: 4px 10px;
            }
            .info-list-card {
                flex-direction: column;
                align-items: flex-start;
                gap: 10px;
                padding: 16px;
            }
            .info-list-card .list-tag {
                white-space: normal;
            }
            .section-title {
                font-size: 1.35rem;
            }
            .param-strip {
                grid-template-columns: 1fr;
            }
            .compare-table-wrapper {
                border-radius: var(--radius-small);
            }
            .faq-item summary {
                padding: 14px 16px;
                font-size: 0.88rem;
            }
            .faq-item .faq-answer {
                padding: 0 16px 16px;
                font-size: 0.82rem;
            }
        }

        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                transition-duration: 0.01ms !important;
                animation-duration: 0.01ms !important;
                scroll-behavior: auto !important;
            }
        }

/* roulang page: article */
:root {
            --primary-900: #0E1A14;
            --primary-800: #12211A;
            --primary-700: #14201A;
            --accent-lime: #B8F03D;
            --accent-cyan: #35E0C0;
            --accent-gold: #E7B45C;
            --text-primary: #F5F7F2;
            --text-secondary: #C2CFC4;
            --text-muted: #8FA69A;
            --border-light: rgba(230, 255, 235, 0.14);
            --border-strong: rgba(230, 255, 235, 0.22);
            --bg-panel: #14201A;
            --bg-gradient-start: #12211A;
            --bg-gradient-end: #0B1210;
            --shadow-card: 0 8px 24px rgba(0, 0, 0, 0.25);
            --shadow-card-hover: 0 18px 42px rgba(0, 0, 0, 0.38);
            --radius-card: 20px;
            --radius-btn: 999px;
            --radius-input: 12px;
            --radius-small: 14px;
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', 'Inter', system-ui, -apple-system, sans-serif;
            --transition-fast: 0.2s ease;
            --transition-base: 0.25s ease;
            --transition-slow: 0.3s ease;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        body {
            font-family: var(--font-sans);
            background-color: var(--primary-900);
            color: var(--text-primary);
            line-height: 1.8;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        /* ===== Navigation ===== */
        #site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            padding: 16px 0;
            background: rgba(14, 26, 20, 0.72);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border-light);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.18);
            transition: background var(--transition-base), box-shadow var(--transition-base), padding var(--transition-base);
        }
        #site-header.scrolled {
            background: var(--primary-900);
            box-shadow: 0 8px 28px rgba(0, 0, 0, 0.38);
            padding: 10px 0;
        }
        #site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            flex-wrap: wrap;
        }
        .nav-brand {
            font-weight: 800;
            font-size: 1.125rem;
            letter-spacing: 0.02em;
            white-space: nowrap;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 8px;
            line-height: 1.3;
        }
        .nav-brand .brand-icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--accent-lime);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary-900);
            font-size: 1.15rem;
            flex-shrink: 0;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
        }
        .nav-links a {
            font-size: 0.925rem;
            font-weight: 500;
            color: var(--text-secondary);
            letter-spacing: 0.01em;
            transition: color var(--transition-fast);
            position: relative;
            white-space: nowrap;
        }
        .nav-links a:hover,
        .nav-links a.active {
            color: var(--accent-lime);
        }
        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 0;
            right: 0;
            height: 2px;
            background: var(--accent-lime);
            border-radius: 2px;
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .nav-search-btn {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: transparent;
            border: 1px solid var(--border-light);
            color: var(--text-secondary);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: all var(--transition-fast);
            font-size: 1rem;
        }
        .nav-search-btn:hover {
            background: rgba(184, 240, 61, 0.1);
            border-color: var(--accent-lime);
            color: var(--accent-lime);
        }
        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 20px;
            border-radius: var(--radius-btn);
            background: var(--accent-lime);
            color: var(--primary-900);
            font-weight: 700;
            font-size: 0.875rem;
            white-space: nowrap;
            transition: all var(--transition-fast);
            border: none;
            cursor: pointer;
        }
        .nav-cta:hover {
            background: #c5f755;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(184, 240, 61, 0.25);
        }
        .nav-cta:focus {
            outline: 2px solid var(--accent-lime);
            outline-offset: 2px;
        }
        .nav-toggle {
            display: none;
            width: 44px;
            height: 44px;
            border-radius: 10px;
            background: transparent;
            border: 1px solid var(--border-light);
            color: var(--text-primary);
            align-items: center;
            justify-content: center;
            cursor: pointer;
            font-size: 1.15rem;
            transition: all var(--transition-fast);
        }
        .nav-toggle:hover {
            background: rgba(184, 240, 61, 0.1);
            border-color: var(--accent-lime);
            color: var(--accent-lime);
        }
        .mobile-menu {
            display: none;
            width: 100%;
            background: var(--primary-900);
            border-top: 1px solid var(--border-light);
            padding: 16px 0;
            flex-direction: column;
            gap: 0;
        }
        .mobile-menu a {
            display: block;
            padding: 12px 16px;
            color: var(--text-secondary);
            font-weight: 500;
            border-bottom: 1px solid rgba(230, 255, 235, 0.06);
        }
        .mobile-menu a:hover,
        .mobile-menu a.active {
            color: var(--accent-lime);
        }
        .mobile-menu.open {
            display: flex;
        }
        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: var(--radius-btn);
            font-weight: 700;
            font-size: 0.925rem;
            white-space: nowrap;
            transition: all var(--transition-fast);
            cursor: pointer;
            border: none;
            line-height: 1.4;
        }
        .btn:focus {
            outline: 2px solid var(--accent-lime);
            outline-offset: 2px;
        }
        .btn:active {
            transform: scale(0.97);
        }
        .btn-primary {
            background: var(--accent-lime);
            color: var(--primary-900);
        }
        .btn-primary:hover {
            background: #c5f755;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(184, 240, 61, 0.25);
        }
        .btn-secondary {
            background: transparent;
            color: var(--accent-lime);
            border: 1px solid var(--accent-lime);
        }
        .btn-secondary:hover {
            background: rgba(184, 240, 61, 0.08);
            transform: translateY(-2px);
        }
        /* ===== Breadcrumb ===== */
        .breadcrumb-section {
            padding-top: 100px;
            padding-bottom: 24px;
            background: var(--primary-900);
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 8px;
            font-size: 0.875rem;
            color: var(--text-muted);
        }
        .breadcrumb a {
            color: var(--text-secondary);
            transition: color var(--transition-fast);
        }
        .breadcrumb a:hover {
            color: var(--accent-lime);
        }
        .breadcrumb-sep {
            color: var(--text-muted);
            opacity: 0.6;
        }
        .breadcrumb-current {
            color: var(--accent-lime);
            font-weight: 600;
            max-width: 360px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }
        /* ===== Article Cover ===== */
        .article-cover-section {
            padding: 24px 0 40px;
            background: var(--primary-900);
        }
        .article-cover {
            width: 100%;
            aspect-ratio: 21 / 9;
            max-height: 440px;
            border-radius: var(--radius-card);
            overflow: hidden;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-card);
            background: var(--bg-panel);
        }
        .article-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        /* ===== Article Header ===== */
        .article-header-section {
            padding: 24px 0 32px;
            background: var(--primary-900);
        }
        .article-main-col {
            max-width: 820px;
            margin: 0 auto;
        }
        .article-title {
            font-size: clamp(1.75rem, 3.5vw, 2.75rem);
            font-weight: 800;
            line-height: 1.25;
            color: var(--text-primary);
            letter-spacing: 0.01em;
            margin-bottom: 16px;
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 16px 24px;
            padding-bottom: 20px;
            border-bottom: 1px solid var(--border-light);
            font-size: 0.875rem;
            color: var(--text-muted);
        }
        .article-meta span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .article-meta i {
            color: var(--accent-cyan);
            font-size: 0.85rem;
        }
        /* ===== Article Body ===== */
        .article-body-section {
            padding: 16px 0 40px;
            background: var(--primary-900);
        }
        .article-body {
            max-width: 720px;
            margin: 0 auto;
            color: var(--text-secondary);
            font-size: 1rem;
            line-height: 1.9;
        }
        .article-body h2 {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-top: 2em;
            margin-bottom: 0.75em;
            line-height: 1.4;
            letter-spacing: 0.01em;
        }
        .article-body h3 {
            font-size: 1.2rem;
            font-weight: 600;
            color: var(--text-primary);
            margin-top: 1.6em;
            margin-bottom: 0.6em;
            line-height: 1.45;
        }
        .article-body p {
            margin-bottom: 1.5em;
        }
        .article-body ul,
        .article-body ol {
            margin: 0 0 1.5em 1.4em;
            padding-left: 0.8em;
        }
        .article-body ul li,
        .article-body ol li {
            margin-bottom: 0.45em;
            padding-left: 0.25em;
        }
        .article-body ul {
            list-style-type: disc;
        }
        .article-body ol {
            list-style-type: decimal;
        }
        .article-body ul li::marker {
            color: var(--accent-lime);
        }
        .article-body ol li::marker {
            color: var(--accent-lime);
        }
        .article-body blockquote {
            border-left: 4px solid var(--accent-lime);
            background: var(--bg-panel);
            padding: 16px 20px;
            margin: 1.5em 0;
            border-radius: 0 var(--radius-small) var(--radius-small) 0;
            color: var(--text-primary);
            font-style: normal;
        }
        .article-body img {
            border-radius: var(--radius-small);
            margin: 1.5em 0;
            border: 1px solid var(--border-light);
        }
        .article-body table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5em 0;
            font-size: 0.9rem;
            display: block;
            overflow-x: auto;
            white-space: nowrap;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-small);
        }
        .article-body table th,
        .article-body table td {
            padding: 10px 14px;
            text-align: left;
            border-bottom: 1px solid var(--border-light);
        }
        .article-body table th {
            background: var(--bg-panel);
            color: var(--text-primary);
            font-weight: 600;
        }
        .article-body table td {
            color: var(--text-secondary);
        }
        .article-body a {
            color: var(--accent-cyan);
            text-decoration: underline;
            text-underline-offset: 3px;
        }
        .article-body a:hover {
            color: var(--accent-lime);
        }
        .article-empty {
            max-width: 720px;
            margin: 0 auto;
            text-align: center;
            padding: 64px 24px;
            background: var(--bg-panel);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            color: var(--text-muted);
        }
        .article-empty i {
            font-size: 3rem;
            color: var(--accent-cyan);
            margin-bottom: 16px;
            display: block;
        }
        .article-empty p {
            margin-bottom: 24px;
            font-size: 1.1rem;
            color: var(--text-secondary);
        }
        /* ===== Article Tags ===== */
        .article-tags-section {
            padding: 24px 0 32px;
            background: var(--primary-900);
        }
        .article-tags {
            max-width: 720px;
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .tag {
            display: inline-flex;
            align-items: center;
            padding: 8px 18px;
            border-radius: var(--radius-btn);
            background: var(--bg-panel);
            border: 1px solid var(--border-light);
            color: var(--text-secondary);
            font-size: 0.85rem;
            font-weight: 500;
            transition: all var(--transition-fast);
            cursor: pointer;
        }
        .tag:hover {
            border-color: var(--accent-lime);
            color: var(--accent-lime);
            background: rgba(184, 240, 61, 0.06);
        }
        /* ===== Related Articles ===== */
        .related-section {
            padding: 64px 0 80px;
            background: linear-gradient(180deg, var(--primary-900) 0%, var(--bg-gradient-start) 100%);
            border-top: 1px solid var(--border-light);
        }
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.8rem;
            font-weight: 700;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--accent-cyan);
            margin-bottom: 12px;
        }
        .section-label::before {
            content: '';
            width: 24px;
            height: 2px;
            background: var(--accent-cyan);
            border-radius: 2px;
        }
        .section-title {
            font-size: clamp(1.5rem, 3vw, 2.25rem);
            font-weight: 700;
            line-height: 1.35;
            color: var(--text-primary);
            margin-bottom: 32px;
            letter-spacing: 0.01em;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--bg-panel);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
        }
        .related-card:hover {
            border-color: var(--accent-lime);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
        }
        .related-card-image {
            aspect-ratio: 16 / 9;
            overflow: hidden;
            border-bottom: 1px solid var(--border-light);
        }
        .related-card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }
        .related-card:hover .related-card-image img {
            transform: scale(1.05);
        }
        .related-card-body {
            padding: 20px;
            display: flex;
            flex-direction: column;
            gap: 10px;
            flex: 1;
        }
        .related-card-tag {
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--accent-gold);
            letter-spacing: 0.04em;
        }
        .related-card-title {
            font-size: 1.05rem;
            font-weight: 700;
            line-height: 1.5;
            color: var(--text-primary);
            transition: color var(--transition-fast);
        }
        .related-card:hover .related-card-title {
            color: var(--accent-lime);
        }
        .related-card-excerpt {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.7;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card-link {
            font-size: 0.875rem;
            font-weight: 600;
            color: var(--accent-cyan);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            margin-top: 4px;
            transition: color var(--transition-fast);
        }
        .related-card-link:hover {
            color: var(--accent-lime);
        }
        /* ===== Article Pagination ===== */
        .article-pagination-section {
            padding: 24px 0 48px;
            background: var(--primary-900);
            border-top: 1px solid var(--border-light);
        }
        .article-pagination {
            max-width: 720px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .pagination-link {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 16px 20px;
            background: var(--bg-panel);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-small);
            color: var(--text-secondary);
            font-size: 0.9rem;
            font-weight: 500;
            transition: all var(--transition-fast);
        }
        .pagination-link:hover {
            border-color: var(--accent-lime);
            color: var(--text-primary);
            background: rgba(184, 240, 61, 0.04);
        }
        .pagination-link i {
            color: var(--accent-cyan);
            font-size: 0.85rem;
            flex-shrink: 0;
        }
        .pagination-link span {
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }
        .pagination-link.next {
            justify-content: flex-start;
        }
        /* ===== Subscribe ===== */
        .subscribe-section {
            padding: 72px 0 80px;
            background: var(--bg-gradient-start);
            border-top: 1px solid var(--border-light);
            position: relative;
            overflow: hidden;
        }
        .subscribe-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at center, rgba(184, 240, 61, 0.06) 0%, transparent 62%);
            pointer-events: none;
        }
        .subscribe-inner {
            position: relative;
            max-width: 680px;
            margin: 0 auto;
            text-align: center;
        }
        .subscribe-inner .section-label {
            justify-content: center;
        }
        .subscribe-inner .section-label::after {
            content: '';
            width: 24px;
            height: 2px;
            background: var(--accent-cyan);
            border-radius: 2px;
        }
        .subscribe-title {
            font-size: clamp(1.5rem, 3vw, 2rem);
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 12px;
            letter-spacing: 0.01em;
        }
        .subscribe-desc {
            font-size: 0.95rem;
            color: var(--text-secondary);
            margin-bottom: 28px;
            line-height: 1.8;
        }
        .subscribe-form {
            display: flex;
            flex-direction: column;
            gap: 12px;
            max-width: 480px;
            margin: 0 auto;
        }
        .subscribe-form input {
            padding: 14px 20px;
            border-radius: var(--radius-input);
            background: var(--primary-900);
            border: 1px solid var(--border-light);
            color: var(--text-primary);
            font-size: 0.925rem;
            transition: all var(--transition-fast);
            width: 100%;
            outline: none;
        }
        .subscribe-form input::placeholder {
            color: var(--text-muted);
        }
        .subscribe-form input:focus {
            border-color: var(--accent-lime);
            box-shadow: 0 0 0 3px rgba(184, 240, 61, 0.15);
        }
        .subscribe-form .btn {
            width: 100%;
        }
        .subscribe-privacy {
            font-size: 0.78rem;
            color: var(--text-muted);
            margin-top: 12px;
        }
        /* ===== Footer ===== */
        .site-footer {
            background: #0B1210;
            border-top: 1px solid var(--border-light);
            padding: 64px 0 32px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 48px;
        }
        .footer-brand h3 {
            font-size: 1.15rem;
            font-weight: 800;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 14px;
        }
        .footer-brand .fb-icon {
            width: 32px;
            height: 32px;
            border-radius: 9px;
            background: var(--accent-lime);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: var(--primary-900);
            font-size: 0.95rem;
            flex-shrink: 0;
        }
        .footer-brand p {
            font-size: 0.875rem;
            color: var(--text-muted);
            line-height: 1.8;
            max-width: 280px;
        }
        .footer-col h4 {
            font-size: 0.925rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 14px;
            letter-spacing: 0.02em;
        }
        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-col ul a {
            font-size: 0.875rem;
            color: var(--text-muted);
            transition: color var(--transition-fast);
            display: inline-block;
        }
        .footer-col ul a:hover {
            color: var(--accent-lime);
            text-decoration: underline;
            text-underline-offset: 4px;
        }
        .footer-bottom {
            border-top: 1px solid var(--border-light);
            padding-top: 24px;
            text-align: center;
        }
        .footer-bottom p {
            font-size: 0.8rem;
            color: var(--text-muted);
        }
        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .nav-links {
                gap: 18px;
            }
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }
        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }
            .nav-actions .nav-search-btn {
                display: none;
            }
            .nav-actions .nav-cta {
                display: none;
            }
            .nav-toggle {
                display: flex;
            }
            #site-header .container {
                flex-wrap: nowrap;
            }
            .related-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .article-cover {
                aspect-ratio: 16 / 9;
            }
            .article-main-col {
                max-width: 100%;
            }
            .article-title {
                font-size: 1.6rem;
            }
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
        }
        @media (max-width: 520px) {
            .breadcrumb {
                font-size: 0.8rem;
                gap: 6px;
            }
            .breadcrumb-current {
                max-width: 180px;
            }
            .article-title {
                font-size: 1.4rem;
            }
            .article-meta {
                gap: 10px 16px;
                font-size: 0.8rem;
            }
            .article-body {
                font-size: 0.95rem;
            }
            .subscribe-section {
                padding: 48px 0 56px;
            }
        }
        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                transition-duration: 0.01ms !important;
                animation-duration: 0.01ms !important;
                animation-iteration-count: 1 !important;
                scroll-behavior: auto !important;
            }
        }