/* roulang page: index */
:root {
            --bg-primary: #0B1220;
            --bg-surface: #0F172A;
            --bg-card: rgba(255, 255, 255, 0.06);
            --bg-card-hover: rgba(255, 255, 255, 0.10);
            --border-color: rgba(255, 255, 255, 0.12);
            --border-hover: rgba(34, 211, 238, 0.5);
            --text-primary: #F8FAFC;
            --text-secondary: #E2E8F0;
            --text-muted: #94A3B8;
            --color-cyan: #38BDF8;
            --color-glow: #22D3EE;
            --color-amber: #F59E0B;
            --color-success: #34D399;
            --radius-card: 18px;
            --radius-btn: 12px;
            --shadow-card: 0 12px 40px rgba(2, 6, 23, 0.55);
            --shadow-glow: 0 0 18px rgba(34, 211, 238, 0.45);
            --shadow-glow-hover: 0 0 28px rgba(34, 211, 238, 0.65);
            --section-pad: 80px 0;
            --container-max: 1200px;
            --font-mono: 'SF Mono', 'Cascadia Code', 'Consolas', monospace;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.65;
            font-size: 16px;
            overflow-x: hidden;
            background-image: radial-gradient(ellipse at 20% 0%, rgba(56, 189, 248, 0.08) 0%, transparent 55%),
                radial-gradient(ellipse at 80% 10%, rgba(34, 211, 238, 0.05) 0%, transparent 55%),
                radial-gradient(ellipse at 50% 100%, rgba(56, 189, 248, 0.04) 0%, transparent 60%);
            background-attachment: fixed;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.25s ease;
        }

        a:hover {
            color: var(--color-glow);
        }

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

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            outline: none;
        }

        button {
            cursor: pointer;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(11, 18, 32, 0.82);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border-color);
            transition: background 0.3s ease;
        }
        .site-header.scrolled {
            background: rgba(11, 18, 32, 0.95);
            box-shadow: 0 4px 24px rgba(2, 6, 23, 0.5);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            padding: 16px 0;
            min-height: 68px;
        }
        .nav-left,
        .nav-right {
            flex: 1;
            display: flex;
            align-items: center;
            gap: 28px;
        }
        .nav-right {
            justify-content: flex-end;
        }
        .logo-area {
            flex-shrink: 0;
            text-align: center;
            font-weight: 800;
            font-size: 1.25rem;
            letter-spacing: 0.02em;
            color: var(--text-primary);
            white-space: nowrap;
            transition: color 0.25s ease;
        }
        .logo-area:hover {
            color: var(--color-glow);
        }
        .logo-area .logo-highlight {
            color: var(--color-glow);
        }
        .nav-link {
            color: var(--text-secondary);
            font-size: 0.95rem;
            font-weight: 500;
            padding: 6px 10px;
            border-radius: 8px;
            transition: color 0.25s ease, background 0.25s ease, box-shadow 0.25s ease;
            white-space: nowrap;
        }
        .nav-link:hover {
            color: var(--color-glow);
            background: rgba(34, 211, 238, 0.08);
            box-shadow: 0 0 12px rgba(34, 211, 238, 0.2);
        }
        .nav-link.active {
            color: var(--color-glow);
            background: rgba(34, 211, 238, 0.1);
            box-shadow: 0 0 14px rgba(34, 211, 238, 0.25);
        }
        .nav-link:focus-visible,
        .btn:focus-visible {
            outline: 2px solid rgba(34, 211, 238, 0.7);
            outline-offset: 2px;
        }
        .mobile-toggle {
            display: none;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid var(--border-color);
            color: var(--text-primary);
            width: 44px;
            height: 44px;
            border-radius: 10px;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            transition: border-color 0.25s ease, background 0.25s ease;
        }
        .mobile-toggle:hover {
            border-color: var(--border-hover);
            background: rgba(34, 211, 238, 0.08);
        }
        .mobile-menu {
            display: none;
            flex-direction: column;
            gap: 8px;
            padding: 16px 24px 20px;
            background: rgba(11, 18, 32, 0.97);
            border-bottom: 1px solid var(--border-color);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
        }
        .mobile-menu.open {
            display: flex;
        }
        .mobile-menu .nav-link {
            padding: 12px 14px;
            font-size: 1rem;
            display: block;
            border-radius: 10px;
        }

        /* ===== Section 基础 ===== */
        .section {
            padding: var(--section-pad);
        }
        .section-alt {
            background: rgba(15, 23, 42, 0.55);
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }
        .section-tag {
            display: inline-block;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--color-amber);
            letter-spacing: 0.06em;
            text-transform: uppercase;
            margin-bottom: 14px;
        }
        .section-title {
            font-size: 2rem;
            font-weight: 800;
            line-height: 1.3;
            color: var(--text-primary);
            margin-bottom: 16px;
            letter-spacing: 0.01em;
        }
        .section-desc {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 720px;
            margin-bottom: 36px;
            line-height: 1.75;
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 13px 28px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 0.95rem;
            transition: all 0.25s ease;
            border: 1px solid transparent;
            white-space: nowrap;
        }
        .btn-primary {
            background: linear-gradient(135deg, #38BDF8, #22D3EE);
            color: #0B1220;
            box-shadow: var(--shadow-glow);
            border: none;
        }
        .btn-primary:hover {
            box-shadow: var(--shadow-glow-hover);
            transform: translateY(-1px);
            color: #0B1220;
            filter: brightness(1.08);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 0 8px rgba(34, 211, 238, 0.3);
        }
        .btn-secondary {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid var(--border-color);
            color: var(--text-primary);
            backdrop-filter: blur(8px);
        }
        .btn-secondary:hover {
            border-color: var(--border-hover);
            background: rgba(34, 211, 238, 0.1);
            color: var(--color-glow);
            box-shadow: 0 0 16px rgba(34, 211, 238, 0.25);
        }
        .btn-sm {
            padding: 9px 18px;
            font-size: 0.85rem;
            border-radius: 9px;
        }
        .btn-lg {
            padding: 16px 38px;
            font-size: 1.05rem;
            border-radius: 14px;
        }

        /* ===== 玻璃拟态卡片 ===== */
        .glass-card {
            background: var(--bg-card);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            transition: all 0.3s ease;
        }
        .glass-card:hover {
            background: var(--bg-card-hover);
            border-color: var(--border-hover);
            box-shadow: 0 16px 48px rgba(2, 6, 23, 0.65), 0 0 20px rgba(34, 211, 238, 0.15);
            transform: translateY(-4px);
        }
        .rarity-strip {
            height: 3px;
            border-radius: 3px 3px 0 0;
            background: linear-gradient(90deg, #38BDF8, #22D3EE, #F59E0B);
            margin: -1px -1px 0 -1px;
        }
        .rarity-strip.amber {
            background: linear-gradient(90deg, #F59E0B, #FBBF24, #F59E0B);
        }
        .rarity-strip.green {
            background: linear-gradient(90deg, #34D399, #6EE7B7, #34D399);
        }

        /* ===== 标签 ===== */
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 0.75rem;
            font-weight: 600;
            padding: 4px 10px;
            border-radius: 999px;
            line-height: 1.2;
            white-space: nowrap;
        }
        .badge-cyan {
            background: rgba(34, 211, 238, 0.15);
            color: var(--color-glow);
            border: 1px solid rgba(34, 211, 238, 0.3);
        }
        .badge-amber {
            background: rgba(245, 158, 11, 0.15);
            color: var(--color-amber);
            border: 1px solid rgba(245, 158, 11, 0.3);
        }
        .badge-green {
            background: rgba(52, 211, 153, 0.15);
            color: var(--color-success);
            border: 1px solid rgba(52, 211, 153, 0.3);
        }

        /* ===== Hero ===== */
        .hero-section {
            position: relative;
            min-height: 640px;
            display: flex;
            align-items: center;
            overflow: hidden;
            background: var(--bg-primary);
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            z-index: 1;
        }
        .hero-bg img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            object-position: center;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            z-index: 2;
            background: linear-gradient(180deg, rgba(11,18,32,0.75) 0%, rgba(11,18,32,0.88) 55%, rgba(11,18,32,0.95) 100%);
            backdrop-filter: blur(2px);
        }
        .hero-content {
            position: relative;
            z-index: 3;
            padding: 80px 0;
            width: 100%;
        }
        .hero-grid {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 48px;
            align-items: center;
        }
        .hero-title {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.25;
            color: var(--text-primary);
            margin-bottom: 20px;
            letter-spacing: 0.01em;
        }
        .hero-title .highlight {
            color: var(--color-glow);
            text-shadow: 0 0 20px rgba(34, 211, 238, 0.5);
        }
        .hero-desc {
            font-size: 1.1rem;
            color: var(--text-secondary);
            max-width: 560px;
            margin-bottom: 28px;
            line-height: 1.8;
        }
        .hero-btns {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-bottom: 28px;
        }
        .hero-data-row {
            display: flex;
            flex-wrap: wrap;
            gap: 28px;
        }
        .hero-data-item {
            text-align: left;
        }
        .hero-data-num {
            font-family: var(--font-mono);
            font-size: 1.55rem;
            font-weight: 700;
            color: var(--color-glow);
            text-shadow: 0 0 14px rgba(34, 211, 238, 0.35);
        }
        .hero-data-label {
            font-size: 0.82rem;
            color: var(--text-muted);
            margin-top: 2px;
        }
        .hero-filter-panel {
            background: rgba(255, 255, 255, 0.07);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border: 1px solid var(--border-color);
            border-radius: 20px;
            padding: 28px;
            box-shadow: 0 20px 60px rgba(2, 6, 23, 0.6);
        }
        .hero-filter-panel h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 18px;
            color: var(--text-primary);
        }
        .filter-label {
            display: block;
            font-size: 0.82rem;
            font-weight: 600;
            color: var(--text-muted);
            margin-bottom: 6px;
            letter-spacing: 0.03em;
        }
        .filter-group {
            margin-bottom: 16px;
        }
        .filter-select {
            width: 100%;
            padding: 12px 16px;
            background: rgba(11, 18, 32, 0.7);
            border: 1px solid var(--border-color);
            border-radius: 10px;
            color: var(--text-primary);
            font-size: 0.95rem;
            transition: border-color 0.25s ease, box-shadow 0.25s ease;
            appearance: none;
            -webkit-appearance: none;
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2394A3B8' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
            background-repeat: no-repeat;
            background-position: right 14px center;
        }
        .filter-select:focus {
            border-color: var(--border-hover);
            box-shadow: 0 0 12px rgba(34, 211, 238, 0.3);
        }
        .filter-select option {
            background: #0F172A;
            color: #F8FAFC;
        }
        .filter-panel-btn {
            width: 100%;
            margin-top: 6px;
        }

        /* ===== 功能卡片 ===== */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .feature-card {
            padding: 24px 22px;
        }
        .feature-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.25rem;
            margin-bottom: 16px;
            background: rgba(34, 211, 238, 0.12);
            color: var(--color-glow);
            border: 1px solid rgba(34, 211, 238, 0.25);
        }
        .feature-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text-primary);
        }
        .feature-card p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* ===== 场景矩阵 ===== */
        .scene-grid {
            display: grid;
            grid-template-columns: 1.2fr 1fr;
            grid-template-rows: 1fr 1fr;
            gap: 20px;
        }
        .scene-card-large {
            grid-row: span 2;
            padding: 32px;
            display: flex;
            flex-direction: column;
            justify-content: flex-end;
            min-height: 360px;
            position: relative;
            overflow: hidden;
            background-size: cover;
            background-position: center;
        }
        .scene-card-large::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(11,18,32,0.25) 0%, rgba(11,18,32,0.85) 100%);
            border-radius: var(--radius-card);
        }
        .scene-card-large > * {
            position: relative;
            z-index: 1;
        }
        .scene-card-large h3 {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text-primary);
        }
        .scene-card-large p {
            font-size: 0.95rem;
            color: var(--text-secondary);
            max-width: 360px;
        }
        .scene-card-small {
            padding: 24px;
            display: flex;
            align-items: center;
            gap: 18px;
        }
        .scene-card-small .scene-icon {
            flex-shrink: 0;
            width: 52px;
            height: 52px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            background: rgba(245, 158, 11, 0.12);
            color: var(--color-amber);
            border: 1px solid rgba(245, 158, 11, 0.25);
        }
        .scene-card-small h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 4px;
        }
        .scene-card-small p {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.5;
        }

        /* ===== 流程步骤 ===== */
        .step-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .step-card {
            padding: 28px 24px;
            position: relative;
            text-align: center;
        }
        .step-num {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: linear-gradient(135deg, #38BDF8, #22D3EE);
            color: #0B1220;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.1rem;
            margin: 0 auto 14px;
            box-shadow: 0 0 16px rgba(34, 211, 238, 0.4);
        }
        .step-card h3 {
            font-size: 1.08rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text-primary);
        }
        .step-card p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* ===== 截图演示 ===== */
        .demo-card {
            border-radius: 20px;
            overflow: hidden;
            border: 1px solid var(--border-color);
            background: rgba(15, 23, 42, 0.7);
            box-shadow: var(--shadow-card);
        }
        .demo-topbar {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 12px 18px;
            background: rgba(255, 255, 255, 0.04);
            border-bottom: 1px solid var(--border-color);
        }
        .demo-dot {
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: #f87171;
        }
        .demo-dot:nth-child(2) { background: #fbbf24; }
        .demo-dot:nth-child(3) { background: #34d399; }
        .demo-url {
            margin-left: 12px;
            font-size: 0.8rem;
            color: var(--text-muted);
            background: rgba(11, 18, 32, 0.6);
            padding: 4px 14px;
            border-radius: 8px;
            flex: 1;
            max-width: 320px;
        }
        .demo-body {
            display: flex;
            justify-content: center;
            align-items: center;
            padding: 32px;
            min-height: 320px;
            background: rgba(11, 18, 32, 0.5);
        }
        .demo-body img {
            border-radius: 12px;
            max-height: 300px;
            width: auto;
            box-shadow: 0 8px 32px rgba(2, 6, 23, 0.6);
        }

        /* ===== 数据指标 ===== */
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .metric-card {
            padding: 28px 22px;
            text-align: center;
        }
        .metric-num {
            font-family: var(--font-mono);
            font-size: 2.1rem;
            font-weight: 700;
            color: var(--color-glow);
            text-shadow: 0 0 18px rgba(34, 211, 238, 0.35);
        }
        .metric-label {
            font-size: 0.88rem;
            color: var(--text-muted);
            margin-top: 6px;
        }

        /* ===== 套餐 ===== */
        .pricing-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            align-items: stretch;
        }
        .pricing-card {
            padding: 28px 22px;
            display: flex;
            flex-direction: column;
            height: 100%;
            position: relative;
        }
        .pricing-card.recommended {
            border-color: rgba(34, 211, 238, 0.5);
            box-shadow: 0 0 32px rgba(34, 211, 238, 0.2), var(--shadow-card);
            transform: translateY(-6px);
        }
        .pricing-card.recommended:hover {
            transform: translateY(-10px);
        }
        .pricing-badge {
            position: absolute;
            top: -12px;
            right: 20px;
            background: linear-gradient(135deg, #F59E0B, #FBBF24);
            color: #0B1220;
            font-size: 0.72rem;
            font-weight: 700;
            padding: 5px 12px;
            border-radius: 999px;
            letter-spacing: 0.04em;
        }
        .pricing-name {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 12px;
        }
        .pricing-price {
            font-family: var(--font-mono);
            font-size: 1.9rem;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 4px;
        }
        .pricing-price span {
            font-size: 0.85rem;
            color: var(--text-muted);
            font-weight: 500;
        }
        .pricing-features {
            list-style: none;
            margin: 16px 0 20px;
            flex: 1;
        }
        .pricing-features li {
            font-size: 0.88rem;
            color: var(--text-secondary);
            padding: 6px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .pricing-features li::before {
            content: '\f00c';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            font-size: 0.72rem;
            color: var(--color-success);
        }

        /* ===== 评价墙 ===== */
        .review-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr 1fr;
            grid-template-rows: auto auto;
            gap: 20px;
        }
        .review-card {
            padding: 22px;
        }
        .review-card.large {
            grid-row: span 2;
        }
        .review-card.tall {
            grid-row: span 2;
        }
        .review-stars {
            color: var(--color-amber);
            font-size: 0.85rem;
            margin-bottom: 10px;
            letter-spacing: 2px;
        }
        .review-text {
            font-size: 0.92rem;
            color: var(--text-secondary);
            line-height: 1.65;
            margin-bottom: 14px;
        }
        .review-name {
            font-size: 0.82rem;
            font-weight: 600;
            color: var(--text-muted);
        }

        /* ===== 口碑统计 ===== */
        .reputation-grid {
            display: grid;
            grid-template-columns: 1fr 2fr;
            gap: 36px;
            align-items: center;
        }
        .reputation-score {
            text-align: center;
            padding: 32px;
        }
        .rep-score-num {
            font-family: var(--font-mono);
            font-size: 3.2rem;
            font-weight: 800;
            color: var(--color-glow);
            text-shadow: 0 0 24px rgba(34, 211, 238, 0.4);
        }
        .rep-score-label {
            font-size: 0.95rem;
            color: var(--text-muted);
            margin-top: 4px;
        }
        .rep-bars {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .rep-bar-row {
            display: flex;
            align-items: center;
            gap: 14px;
        }
        .rep-bar-label {
            font-size: 0.82rem;
            color: var(--text-muted);
            width: 56px;
            flex-shrink: 0;
        }
        .rep-bar-track {
            flex: 1;
            height: 8px;
            background: rgba(255, 255, 255, 0.06);
            border-radius: 999px;
            overflow: hidden;
        }
        .rep-bar-fill {
            height: 100%;
            border-radius: 999px;
            background: linear-gradient(90deg, #38BDF8, #22D3EE);
            box-shadow: 0 0 8px rgba(34, 211, 238, 0.4);
            transition: width 0.8s ease;
        }

        /* ===== 资讯列表 ===== */
        .news-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .news-item {
            display: flex;
            align-items: center;
            gap: 20px;
            padding: 16px 18px;
            transition: all 0.3s ease;
        }
        .news-item:hover {
            border-color: var(--border-hover);
            transform: translateX(4px);
        }
        .news-thumb {
            width: 100px;
            height: 62px;
            flex-shrink: 0;
            border-radius: 10px;
            overflow: hidden;
            background: rgba(255, 255, 255, 0.05);
        }
        .news-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .news-info {
            flex: 1;
            min-width: 0;
        }
        .news-info h3 {
            font-size: 0.98rem;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 4px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .news-info p {
            font-size: 0.85rem;
            color: var(--text-muted);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .news-date {
            font-size: 0.8rem;
            color: var(--text-muted);
            flex-shrink: 0;
            white-space: nowrap;
        }

        /* ===== 爆款清单 ===== */
        .hot-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .hot-item {
            display: flex;
            align-items: center;
            gap: 18px;
            padding: 16px 20px;
            transition: all 0.3s ease;
        }
        .hot-item:hover {
            border-color: var(--border-hover);
            transform: translateX(4px);
        }
        .hot-rank {
            font-family: var(--font-mono);
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--color-glow);
            width: 44px;
            text-align: center;
            flex-shrink: 0;
            text-shadow: 0 0 12px rgba(34, 211, 238, 0.3);
        }
        .hot-rank.top1 { color: #FBBF24; }
        .hot-rank.top2 { color: #E2E8F0; }
        .hot-rank.top3 { color: #F97316; }
        .hot-info {
            flex: 1;
            min-width: 0;
        }
        .hot-info h3 {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 4px;
        }
        .hot-info p {
            font-size: 0.82rem;
            color: var(--text-muted);
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, rgba(56, 189, 248, 0.12), rgba(34, 211, 238, 0.06));
            border: 1px solid rgba(34, 211, 238, 0.25);
            border-radius: 24px;
            padding: 48px 40px;
            text-align: center;
        }
        .cta-section h2 {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 14px;
        }
        .cta-section p {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 600px;
            margin: 0 auto 28px;
            line-height: 1.7;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: rgba(9, 15, 27, 0.95);
            border-top: 1px solid var(--border-color);
            padding: 56px 0 32px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 36px;
            margin-bottom: 40px;
        }
        .footer-brand h3 {
            font-size: 1.2rem;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 12px;
        }
        .footer-brand p {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.65;
            max-width: 280px;
        }
        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 14px;
        }
        .footer-col ul {
            list-style: none;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul li a {
            font-size: 0.88rem;
            color: var(--text-muted);
            transition: color 0.25s ease;
        }
        .footer-col ul li a:hover {
            color: var(--color-glow);
        }
        .footer-bottom {
            border-top: 1px solid var(--border-color);
            padding-top: 24px;
            text-align: center;
            font-size: 0.82rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .header-inner {
                gap: 14px;
            }
            .nav-left,
            .nav-right {
                gap: 16px;
            }
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .hero-title {
                font-size: 2.1rem;
            }
            .feature-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .pricing-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .pricing-card.recommended {
                transform: translateY(0);
            }
            .review-grid {
                grid-template-columns: 1fr 1fr;
                grid-template-rows: auto;
            }
            .review-card.large,
            .review-card.tall {
                grid-row: span 1;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .section {
                padding: 64px 0;
            }
            .scene-grid {
                grid-template-columns: 1fr;
                grid-template-rows: auto;
            }
            .scene-card-large {
                grid-row: span 1;
                min-height: 240px;
            }
            .step-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .reputation-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
        }

        @media (max-width: 768px) {
            .nav-left,
            .nav-right {
                display: none;
            }
            .mobile-toggle {
                display: flex;
            }
            .header-inner {
                justify-content: space-between;
            }
            .logo-area {
                position: absolute;
                left: 50%;
                transform: translateX(-50%);
            }
            .hero-section {
                min-height: auto;
                padding: 40px 0;
            }
            .hero-title {
                font-size: 1.75rem;
            }
            .hero-desc {
                font-size: 0.98rem;
            }
            .hero-btns {
                flex-direction: column;
            }
            .hero-btns .btn {
                width: 100%;
            }
            .hero-data-row {
                gap: 18px;
            }
            .feature-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .metrics-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .pricing-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .review-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .news-item {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }
            .news-thumb {
                width: 100%;
                height: 140px;
            }
            .news-date {
                align-self: flex-end;
            }
            .hot-item {
                align-items: flex-start;
                flex-wrap: wrap;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .cta-section {
                padding: 32px 20px;
            }
            .cta-section h2 {
                font-size: 1.4rem;
            }
            .section-title {
                font-size: 1.6rem;
            }
            .demo-body {
                min-height: 200px;
                padding: 16px;
            }
            .demo-body img {
                max-height: 180px;
            }
            .btn-lg {
                padding: 14px 28px;
                font-size: 0.95rem;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .hero-title {
                font-size: 1.5rem;
            }
            .hero-filter-panel {
                padding: 20px;
            }
            .metrics-grid {
                grid-template-columns: 1fr;
            }
            .section {
                padding: 48px 0;
            }
            .section-title {
                font-size: 1.4rem;
            }
            .section-desc {
                font-size: 0.95rem;
            }
            .hot-rank {
                font-size: 1.1rem;
                width: 32px;
            }
        }

/* roulang page: category1 */
:root {
            --bg-primary: #0B1220;
            --bg-surface: #0F172A;
            --bg-card: rgba(255, 255, 255, 0.06);
            --bg-card-hover: rgba(255, 255, 255, 0.10);
            --border-color: rgba(255, 255, 255, 0.12);
            --border-hover: rgba(34, 211, 238, 0.5);
            --text-primary: #F8FAFC;
            --text-secondary: #E2E8F0;
            --text-muted: #94A3B8;
            --color-cyan: #38BDF8;
            --color-glow: #22D3EE;
            --color-amber: #F59E0B;
            --color-success: #34D399;
            --radius-card: 18px;
            --radius-btn: 12px;
            --shadow-card: 0 12px 40px rgba(2, 6, 23, 0.55);
            --shadow-glow: 0 0 18px rgba(34, 211, 238, 0.45);
            --shadow-glow-hover: 0 0 28px rgba(34, 211, 238, 0.65);
            --section-pad: 72px 0;
            --container-max: 1200px;
            --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            --font-mono: 'SF Mono', 'Cascadia Code', 'Consolas', monospace;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.65;
            font-size: 16px;
            overflow-x: hidden;
            background-image: radial-gradient(ellipse at 20% 0%, rgba(56, 189, 248, 0.08) 0%, transparent 55%),
                radial-gradient(ellipse at 80% 10%, rgba(34, 211, 238, 0.05) 0%, transparent 55%),
                radial-gradient(ellipse at 50% 100%, rgba(56, 189, 248, 0.04) 0%, transparent 60%);
            background-attachment: fixed;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.25s ease;
        }

        a:hover {
            color: var(--color-glow);
        }

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

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            outline: none;
        }

        button {
            cursor: pointer;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(11, 18, 32, 0.82);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border-color);
            transition: background 0.3s ease, box-shadow 0.3s ease;
        }

        .site-header.scrolled {
            background: rgba(11, 18, 32, 0.95);
            box-shadow: 0 4px 24px rgba(2, 6, 23, 0.5);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            padding: 16px 0;
            min-height: 68px;
        }

        .nav-left,
        .nav-right {
            flex: 1;
            display: flex;
            align-items: center;
            gap: 28px;
        }

        .nav-right {
            justify-content: flex-end;
        }

        .logo-area {
            flex-shrink: 0;
            text-align: center;
            font-weight: 800;
            font-size: 1.25rem;
            letter-spacing: 0.02em;
            color: var(--text-primary);
            white-space: nowrap;
            transition: color 0.25s ease;
        }

        .logo-area:hover {
            color: var(--color-glow);
        }

        .logo-area .logo-highlight {
            color: var(--color-glow);
        }

        .nav-link {
            color: var(--text-secondary);
            font-size: 0.95rem;
            font-weight: 500;
            padding: 6px 10px;
            border-radius: 8px;
            transition: color 0.25s ease, background 0.25s ease, box-shadow 0.25s ease;
            white-space: nowrap;
        }

        .nav-link:hover {
            color: var(--color-glow);
            background: rgba(34, 211, 238, 0.08);
            box-shadow: 0 0 12px rgba(34, 211, 238, 0.2);
        }

        .nav-link.active {
            color: var(--color-glow);
            background: rgba(34, 211, 238, 0.1);
            box-shadow: 0 0 14px rgba(34, 211, 238, 0.25);
        }

        .nav-link:focus-visible,
        .btn:focus-visible,
        .filter-tag:focus-visible {
            outline: 2px solid rgba(34, 211, 238, 0.7);
            outline-offset: 2px;
        }

        .mobile-toggle {
            display: none;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid var(--border-color);
            color: var(--text-primary);
            width: 44px;
            height: 44px;
            border-radius: 10px;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            transition: border-color 0.25s ease, background 0.25s ease;
        }

        .mobile-toggle:hover {
            border-color: var(--border-hover);
            background: rgba(34, 211, 238, 0.08);
        }

        .mobile-menu {
            display: none;
            flex-direction: column;
            gap: 8px;
            padding: 16px 24px 20px;
            background: rgba(11, 18, 32, 0.97);
            border-bottom: 1px solid var(--border-color);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
        }

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

        .mobile-menu .nav-link {
            padding: 12px 14px;
            font-size: 1rem;
            display: block;
            border-radius: 10px;
        }

        /* ===== Section 基础 ===== */
        .section {
            padding: var(--section-pad);
        }

        .section-alt {
            background: rgba(15, 23, 42, 0.55);
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }

        .section-tag {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--color-glow);
            background: rgba(34, 211, 238, 0.1);
            border: 1px solid rgba(34, 211, 238, 0.25);
            border-radius: 999px;
            padding: 6px 16px;
            margin-bottom: 16px;
        }

        .section-title {
            font-size: 1.9rem;
            font-weight: 800;
            line-height: 1.3;
            color: var(--text-primary);
            margin-bottom: 14px;
            letter-spacing: 0.01em;
        }

        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-muted);
            line-height: 1.7;
            max-width: 720px;
        }

        /* ===== 分类页顶部区 ===== */
        .category-hero {
            position: relative;
            padding: 72px 0 52px;
            background-image: linear-gradient(180deg, rgba(11, 18, 32, 0.72) 0%, rgba(11, 18, 32, 0.88) 100%),
                url('/assets/images/dd65853e6baac2f6.webp');
            background-size: cover;
            background-position: center;
            border-bottom: 1px solid var(--border-color);
        }

        .category-hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(34, 211, 238, 0.4), transparent);
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 22px;
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: var(--text-secondary);
            transition: color 0.25s ease;
        }

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

        .breadcrumb .separator {
            color: rgba(148, 163, 184, 0.5);
        }

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

        .category-hero h1 {
            font-size: 2.2rem;
            font-weight: 800;
            line-height: 1.3;
            color: var(--text-primary);
            margin-bottom: 14px;
            letter-spacing: 0.01em;
        }

        .category-hero .hero-desc {
            font-size: 1.05rem;
            color: var(--text-secondary);
            line-height: 1.7;
            max-width: 780px;
            margin-bottom: 24px;
        }

        .hero-stats {
            display: flex;
            gap: 32px;
            flex-wrap: wrap;
        }

        .hero-stat {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.9rem;
            color: var(--text-muted);
        }

        .hero-stat .stat-number {
            font-weight: 800;
            font-size: 1.3rem;
            color: var(--color-glow);
            font-family: var(--font-mono);
        }

        .hero-stat .stat-label {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* ===== 筛选标签栏 ===== */
        .filter-bar {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 10px;
            padding: 8px 0;
        }

        .filter-bar .filter-label {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--text-muted);
            margin-right: 6px;
            white-space: nowrap;
        }

        .filter-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 16px;
            border-radius: 999px;
            font-size: 0.88rem;
            font-weight: 500;
            color: var(--text-secondary);
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid var(--border-color);
            cursor: pointer;
            transition: all 0.25s ease;
            white-space: nowrap;
            user-select: none;
        }

        .filter-tag:hover {
            color: var(--color-glow);
            border-color: var(--border-hover);
            background: rgba(34, 211, 238, 0.08);
            box-shadow: 0 0 14px rgba(34, 211, 238, 0.2);
        }

        .filter-tag.active {
            color: var(--color-glow);
            border-color: var(--border-hover);
            background: rgba(34, 211, 238, 0.14);
            box-shadow: 0 0 16px rgba(34, 211, 238, 0.3);
        }

        .filter-tag .tag-dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--color-success);
        }

        .filter-tag .tag-dot.amber {
            background: var(--color-amber);
        }

        .filter-tag .tag-dot.cyan {
            background: var(--color-glow);
        }

        /* ===== 视频卡片列表 ===== */
        .video-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .video-card {
            background: var(--bg-card);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease, background 0.3s ease;
            display: flex;
            flex-direction: column;
        }

        .video-card:hover {
            transform: translateY(-4px);
            border-color: var(--border-hover);
            background: var(--bg-card-hover);
            box-shadow: 0 18px 50px rgba(2, 6, 23, 0.65), 0 0 24px rgba(34, 211, 238, 0.2);
        }

        .video-card .card-thumb {
            position: relative;
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: #0a0f1a;
        }

        .video-card .card-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

        .video-card:hover .card-thumb img {
            transform: scale(1.04);
        }

        .video-card .card-thumb .play-overlay {
            position: absolute;
            inset: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(11, 18, 32, 0.35);
            opacity: 0;
            transition: opacity 0.3s ease;
        }

        .video-card:hover .card-thumb .play-overlay {
            opacity: 1;
        }

        .video-card .card-thumb .play-overlay .play-icon {
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: rgba(34, 211, 238, 0.85);
            color: #0B1220;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            box-shadow: 0 0 24px rgba(34, 211, 238, 0.6);
        }

        .video-card .card-thumb .badge-top {
            position: absolute;
            top: 12px;
            left: 12px;
            display: flex;
            gap: 6px;
        }

        .video-card .card-thumb .badge-top .badge {
            font-size: 0.72rem;
            font-weight: 700;
            padding: 4px 10px;
            border-radius: 999px;
            letter-spacing: 0.03em;
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
        }

        .badge-amber {
            background: rgba(245, 158, 11, 0.9);
            color: #1a1206;
        }

        .badge-cyan {
            background: rgba(34, 211, 238, 0.9);
            color: #06222a;
        }

        .badge-green {
            background: rgba(52, 211, 153, 0.9);
            color: #08221a;
        }

        .video-card .card-body {
            padding: 18px 20px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .video-card .card-title {
            font-size: 1.04rem;
            font-weight: 700;
            line-height: 1.45;
            color: var(--text-primary);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            min-height: 3em;
        }

        .video-card .card-meta {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.82rem;
            color: var(--text-muted);
        }

        .video-card .card-meta span {
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }

        .video-card .card-meta .meta-icon {
            color: var(--color-glow);
            font-size: 0.75rem;
        }

        .video-card .card-actions {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-top: auto;
            padding-top: 12px;
            border-top: 1px solid var(--border-color);
        }

        .video-card .card-actions .btn-watch {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--color-glow);
            padding: 7px 14px;
            border-radius: 8px;
            background: rgba(34, 211, 238, 0.1);
            border: 1px solid rgba(34, 211, 238, 0.25);
            transition: all 0.25s ease;
        }

        .video-card .card-actions .btn-watch:hover {
            background: rgba(34, 211, 238, 0.2);
            box-shadow: 0 0 16px rgba(34, 211, 238, 0.3);
            color: #7DE8F8;
        }

        .video-card .card-actions .card-duration {
            font-size: 0.82rem;
            color: var(--text-muted);
            font-family: var(--font-mono);
        }

        /* ===== 查看更多按钮 ===== */
        .btn-more {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-secondary);
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid var(--border-color);
            transition: all 0.3s ease;
        }

        .btn-more:hover {
            color: var(--color-glow);
            border-color: var(--border-hover);
            background: rgba(34, 211, 238, 0.1);
            box-shadow: var(--shadow-glow);
            transform: translateY(-1px);
        }

        /* ===== 热门更新榜 ===== */
        .rank-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .rank-item {
            display: flex;
            align-items: center;
            gap: 18px;
            padding: 16px 20px;
            background: var(--bg-card);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-color);
            border-radius: 14px;
            transition: all 0.3s ease;
        }

        .rank-item:hover {
            border-color: var(--border-hover);
            background: var(--bg-card-hover);
            box-shadow: 0 0 18px rgba(34, 211, 238, 0.15);
            transform: translateX(4px);
        }

        .rank-item .rank-number {
            flex-shrink: 0;
            width: 40px;
            height: 40px;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.1rem;
            font-family: var(--font-mono);
            color: var(--color-glow);
            background: rgba(34, 211, 238, 0.1);
            border: 1px solid rgba(34, 211, 238, 0.25);
        }

        .rank-item .rank-number.top1 {
            color: var(--color-amber);
            background: rgba(245, 158, 11, 0.12);
            border-color: rgba(245, 158, 11, 0.35);
            box-shadow: 0 0 14px rgba(245, 158, 11, 0.25);
        }

        .rank-item .rank-info {
            flex: 1;
            min-width: 0;
        }

        .rank-item .rank-title {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-primary);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            margin-bottom: 4px;
        }

        .rank-item .rank-meta {
            font-size: 0.82rem;
            color: var(--text-muted);
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }

        .rank-item .rank-status {
            flex-shrink: 0;
            font-size: 0.78rem;
            font-weight: 600;
            padding: 5px 12px;
            border-radius: 999px;
            color: var(--color-success);
            background: rgba(52, 211, 153, 0.12);
            border: 1px solid rgba(52, 211, 153, 0.3);
        }

        /* ===== 观看指南步骤卡 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .step-card {
            background: var(--bg-card);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-card);
            padding: 26px 22px;
            position: relative;
            transition: all 0.3s ease;
            overflow: hidden;
        }

        .step-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, transparent, var(--color-glow), transparent);
            opacity: 0;
            transition: opacity 0.3s ease;
        }

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

        .step-card:hover::before {
            opacity: 1;
        }

        .step-number {
            font-size: 0.78rem;
            font-weight: 700;
            letter-spacing: 0.08em;
            color: var(--color-glow);
            text-transform: uppercase;
            margin-bottom: 10px;
            font-family: var(--font-mono);
        }

        .step-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
            line-height: 1.4;
        }

        .step-card p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.65;
        }

        /* ===== 专题入口 ===== */
        .topic-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 20px;
        }

        .topic-card {
            position: relative;
            border-radius: var(--radius-card);
            overflow: hidden;
            border: 1px solid var(--border-color);
            min-height: 240px;
            display: flex;
            align-items: flex-end;
            background: #0a0f1a;
            transition: all 0.3s ease;
        }

        .topic-card:hover {
            border-color: var(--border-hover);
            box-shadow: 0 18px 50px rgba(2, 6, 23, 0.6), 0 0 24px rgba(34, 211, 238, 0.18);
            transform: translateY(-3px);
        }

        .topic-card .topic-bg {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

        .topic-card:hover .topic-bg {
            transform: scale(1.04);
        }

        .topic-card .topic-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(11, 18, 32, 0.25) 0%, rgba(11, 18, 32, 0.88) 100%);
        }

        .topic-card .topic-content {
            position: relative;
            z-index: 2;
            padding: 24px 26px;
            width: 100%;
        }

        .topic-card .topic-tag {
            display: inline-block;
            font-size: 0.72rem;
            font-weight: 700;
            padding: 4px 12px;
            border-radius: 999px;
            background: rgba(34, 211, 238, 0.2);
            color: var(--color-glow);
            border: 1px solid rgba(34, 211, 238, 0.35);
            margin-bottom: 10px;
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
        }

        .topic-card h3 {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 6px;
        }

        .topic-card p {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.6;
            opacity: 0.9;
        }

        .topic-card .topic-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--color-glow);
            margin-top: 12px;
            transition: all 0.25s ease;
        }

        .topic-card .topic-link:hover {
            gap: 10px;
            color: #7DE8F8;
        }

        /* ===== 合规提示 ===== */
        .compliance-box {
            position: relative;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-card);
            padding: 28px 30px;
            display: flex;
            align-items: flex-start;
            gap: 18px;
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
        }

        .compliance-box::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 2px;
            background: linear-gradient(90deg, transparent, var(--color-amber), transparent);
            opacity: 0.5;
        }

        .compliance-box .compliance-icon {
            flex-shrink: 0;
            width: 44px;
            height: 44px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: var(--color-amber);
            background: rgba(245, 158, 11, 0.1);
            border: 1px solid rgba(245, 158, 11, 0.3);
        }

        .compliance-box .compliance-text h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
        }

        .compliance-box .compliance-text p {
            font-size: 0.92rem;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* ===== CTA 转化区 ===== */
        .cta-section {
            position: relative;
            padding: 72px 0;
            background-image: radial-gradient(ellipse at 50% 0%, rgba(34, 211, 238, 0.1) 0%, transparent 60%),
                radial-gradient(ellipse at 50% 100%, rgba(56, 189, 248, 0.06) 0%, transparent 60%);
        }

        .cta-panel {
            position: relative;
            background: var(--bg-card);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border: 1px solid var(--border-color);
            border-radius: 24px;
            padding: 48px 40px;
            text-align: center;
            overflow: hidden;
            box-shadow: var(--shadow-card);
        }

        .cta-panel::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle at 50% 50%, rgba(34, 211, 238, 0.08) 0%, transparent 60%);
            pointer-events: none;
        }

        .cta-panel h2 {
            font-size: 2rem;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 14px;
            line-height: 1.3;
            position: relative;
            z-index: 1;
        }

        .cta-panel p {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 620px;
            margin: 0 auto 28px;
            line-height: 1.7;
            position: relative;
            z-index: 1;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 32px;
            border-radius: var(--radius-btn);
            font-size: 1rem;
            font-weight: 700;
            color: #06222a;
            background: linear-gradient(135deg, var(--color-glow) 0%, var(--color-cyan) 100%);
            border: none;
            box-shadow: var(--shadow-glow);
            transition: all 0.3s ease;
            position: relative;
            z-index: 1;
        }

        .btn-primary:hover {
            box-shadow: var(--shadow-glow-hover);
            transform: translateY(-2px);
            color: #041820;
            filter: brightness(1.08);
        }

        .btn-primary:active {
            box-shadow: 0 0 10px rgba(34, 211, 238, 0.3);
            transform: translateY(0);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 28px;
            border-radius: var(--radius-btn);
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-secondary);
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid var(--border-color);
            transition: all 0.3s ease;
        }

        .btn-secondary:hover {
            color: var(--color-glow);
            border-color: var(--border-hover);
            background: rgba(34, 211, 238, 0.08);
            box-shadow: 0 0 16px rgba(34, 211, 238, 0.2);
            transform: translateY(-1px);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: rgba(11, 18, 32, 0.9);
            border-top: 1px solid var(--border-color);
            padding: 52px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
        }

        .footer-brand h3 {
            font-size: 1.15rem;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 12px;
            letter-spacing: 0.02em;
        }

        .footer-brand p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.7;
            max-width: 320px;
        }

        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 14px;
            letter-spacing: 0.03em;
        }

        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-col ul li a {
            font-size: 0.88rem;
            color: var(--text-muted);
            transition: color 0.25s ease;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

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

        .footer-bottom {
            border-top: 1px solid var(--border-color);
            padding: 20px 0;
            text-align: center;
        }

        .footer-bottom p {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 4px;
        }

        .footer-bottom p:last-child {
            margin-bottom: 0;
            color: rgba(148, 163, 184, 0.6);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .video-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 18px;
            }

            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }

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

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
        }

        @media (max-width: 768px) {
            .header-inner {
                padding: 12px 0;
                min-height: 58px;
                gap: 12px;
            }

            .nav-left,
            .nav-right {
                display: none;
            }

            .mobile-toggle {
                display: flex;
            }

            .logo-area {
                font-size: 1.05rem;
                flex-shrink: 0;
            }

            .header-inner {
                justify-content: space-between;
            }

            .section {
                padding: 52px 0;
            }

            .category-hero {
                padding: 48px 0 36px;
            }

            .category-hero h1 {
                font-size: 1.7rem;
            }

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

            .hero-stats {
                gap: 18px;
            }

            .video-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

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

            .rank-item {
                padding: 12px 14px;
                gap: 12px;
            }

            .rank-item .rank-number {
                width: 34px;
                height: 34px;
                font-size: 0.95rem;
            }

            .compliance-box {
                padding: 20px 18px;
                flex-direction: column;
                gap: 14px;
            }

            .cta-panel {
                padding: 32px 20px;
                border-radius: 18px;
            }

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

            .filter-bar {
                gap: 8px;
            }

            .filter-tag {
                padding: 6px 12px;
                font-size: 0.8rem;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }

            .logo-area {
                font-size: 0.95rem;
            }

            .category-hero h1 {
                font-size: 1.45rem;
            }

            .hero-desc {
                font-size: 0.92rem;
            }

            .hero-stat .stat-number {
                font-size: 1.1rem;
            }

            .section-title {
                font-size: 1.3rem;
            }

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

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

            .cta-panel {
                padding: 26px 16px;
            }

            .cta-panel h2 {
                font-size: 1.3rem;
            }
        }