/* roulang page: index */
:root {
            --bg-slate: #0D1117;
            --bg-card: #161B22;
            --bg-card-hover: #1F2937;
            --bg-light: #F6F8FA;
            --primary: #6E44FF;
            --primary-glow: rgba(110, 68, 255, 0.4);
            --cyber-cyan: #00F2FE;
            --hyper-orange: #FF6B35;
            --text-main: #F0F6FC;
            --text-muted: #8B949E;
            --text-dark: #1F2328;
            --border-glass: rgba(255, 255, 255, 0.08);
            --border-glow: rgba(0, 242, 254, 0.25);
            --radius-card: 14px;
            --radius-btn: 8px;
            --font-code: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
        }

        body {
            background-color: var(--bg-slate);
            color: var(--text-main);
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            line-height: 1.6;
            overflow-x: hidden;
        }

        /* 基础与排版覆写 */
        a { text-decoration: none; color: inherit; transition: all 0.2s ease; }
        .font-mono { font-family: var(--font-code); }
        .text-cyan { color: var(--cyber-cyan) !important; }
        .text-violet { color: var(--primary) !important; }
        .text-orange { color: var(--hyper-orange) !important; }
        .bg-card-dark { background-color: var(--bg-card); border: 1px solid var(--border-glass); border-radius: var(--radius-card); }
        
        .section-py { padding-top: 5rem; padding-bottom: 5rem; }
        .section-title { font-size: 2.1rem; font-weight: 700; margin-bottom: 1rem; color: #FFFFFF; }
        .section-subtitle { color: var(--text-muted); font-size: 1.05rem; max-width: 780px; margin: 0 auto 3rem auto; }

        /* 双行导航 */
        .site-header {
            background: rgba(13, 17, 23, 0.92);
            backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border-glass);
            z-index: 1040;
        }
        .header-top-row {
            padding: 0.75rem 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            font-size: 0.875rem;
        }
        .brand-logo {
            font-size: 1.4rem;
            font-weight: 800;
            background: linear-gradient(135deg, #FFFFFF 0%, var(--cyber-cyan) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }
        .header-nav-row {
            padding: 0.5rem 0;
            overflow-x: auto;
            white-space: nowrap;
        }
        .channel-nav-link {
            color: var(--text-muted);
            padding: 0.5rem 1.1rem;
            font-weight: 500;
            font-size: 0.95rem;
            border-radius: 6px;
            display: inline-block;
            transition: all 0.25s ease;
        }
        .channel-nav-link:hover, .channel-nav-link.active {
            color: #FFFFFF;
            background: rgba(110, 68, 255, 0.15);
            border-color: var(--primary);
        }

        /* 按钮重塑 */
        .btn-game-primary {
            background: linear-gradient(135deg, var(--primary) 0%, #4D26D6 100%);
            color: #FFFFFF;
            font-weight: 600;
            border: none;
            border-radius: var(--radius-btn);
            padding: 0.75rem 1.75rem;
            box-shadow: 0 4px 18px var(--primary-glow);
            transition: all 0.25s ease;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
        }
        .btn-game-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 24px rgba(110, 68, 255, 0.6);
            color: #FFFFFF;
        }
        .btn-game-outline {
            background: rgba(255, 255, 255, 0.04);
            color: var(--text-main);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-btn);
            padding: 0.75rem 1.75rem;
            font-weight: 500;
            transition: all 0.2s ease;
        }
        .btn-game-outline:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: var(--cyber-cyan);
            color: var(--cyber-cyan);
        }
        .btn-game-orange {
            background: linear-gradient(135deg, var(--hyper-orange) 0%, #E04812 100%);
            color: #FFFFFF;
            font-weight: 600;
            border: none;
            border-radius: var(--radius-btn);
            padding: 0.85rem 2rem;
            box-shadow: 0 4px 18px rgba(255, 107, 53, 0.4);
        }
        .btn-game-orange:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 22px rgba(255, 107, 53, 0.6);
            color: #FFFFFF;
        }

        /* 模块样式微调 */
        .hero-section {
            background: radial-gradient(circle at 80% 20%, rgba(110, 68, 255, 0.15) 0%, transparent 60%),
                        radial-gradient(circle at 10% 80%, rgba(0, 242, 254, 0.08) 0%, transparent 50%),
                        var(--bg-slate);
            padding: 5.5rem 0 4.5rem 0;
            border-bottom: 1px solid var(--border-glass);
        }
        .hero-console {
            background: #0B0E14;
            border: 1px solid var(--border-glow);
            border-radius: 12px;
            padding: 1.25rem;
            box-shadow: 0 20px 40px rgba(0,0,0,0.5);
        }

        .pain-card {
            background: rgba(255, 107, 53, 0.04);
            border: 1px solid rgba(255, 107, 53, 0.15);
            border-radius: var(--radius-card);
            padding: 1.5rem;
            height: 100%;
        }
        
        .feature-card {
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-card);
            padding: 2rem;
            transition: all 0.3s ease;
            height: 100%;
        }
        .feature-card:hover {
            transform: translateY(-4px);
            border-color: rgba(110, 68, 255, 0.4);
            box-shadow: 0 12px 30px rgba(0,0,0,0.4);
        }

        .solution-card {
            background: var(--bg-card);
            border-radius: 16px;
            border: 1px solid var(--border-glass);
            padding: 2.25rem;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            height: 100%;
            position: relative;
            overflow: hidden;
        }
        .solution-card.featured {
            border-color: var(--primary);
            box-shadow: 0 0 25px rgba(110, 68, 255, 0.2);
        }
        .badge-tag {
            background: rgba(0, 242, 254, 0.1);
            color: var(--cyber-cyan);
            border: 1px solid rgba(0, 242, 254, 0.2);
            padding: 0.35rem 0.75rem;
            border-radius: 50rem;
            font-size: 0.8rem;
            font-weight: 600;
        }

        .step-node {
            position: relative;
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-card);
            padding: 2rem;
            height: 100%;
        }
        .step-number {
            width: 44px;
            height: 44px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--cyber-cyan) 100%);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.2rem;
            color: #FFFFFF;
            margin-bottom: 1.25rem;
        }

        .light-band-section {
            background-color: var(--bg-light);
            color: var(--text-dark);
        }
        .light-band-section .section-title {
            color: #0F172A;
        }
        .light-band-section .section-subtitle {
            color: #64748B;
        }
        .light-card {
            background: #FFFFFF;
            border: 1px solid #E2E8F0;
            border-radius: var(--radius-card);
            padding: 2rem;
            box-shadow: 0 4px 16px rgba(0,0,0,0.03);
            height: 100%;
        }

        .metric-box {
            border-right: 1px solid var(--border-glass);
            padding: 1.5rem 1rem;
        }
        .metric-box:last-child {
            border-right: none;
        }
        .metric-val {
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1;
            font-family: var(--font-code);
            margin-bottom: 0.5rem;
            background: linear-gradient(135deg, #FFFFFF 30%, var(--cyber-cyan) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        /* FAQ 手风琴自定义 */
        .accordion-item {
            background-color: var(--bg-card) !important;
            border: 1px solid var(--border-glass) !important;
            border-radius: 10px !important;
            margin-bottom: 1rem;
            overflow: hidden;
        }
        .accordion-button {
            background-color: var(--bg-card) !important;
            color: var(--text-main) !important;
            font-weight: 600;
            font-size: 1.05rem;
            padding: 1.25rem 1.5rem;
            box-shadow: none !important;
        }
        .accordion-button:not(.collapsed) {
            color: var(--cyber-cyan) !important;
            border-bottom: 1px solid var(--border-glass);
        }
        .accordion-button::after {
            filter: invert(1) grayscale(100%) brightness(200%);
        }
        .accordion-body {
            padding: 1.5rem;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* 转化卡片 */
        .conversion-card {
            background: linear-gradient(135deg, rgba(110, 68, 255, 0.12) 0%, rgba(0, 242, 254, 0.06) 100%), var(--bg-card);
            border: 2px solid transparent;
            background-clip: padding-box;
            border-radius: 20px;
            position: relative;
            padding: 3.5rem 2rem;
        }
        .conversion-card::before {
            content: '';
            position: absolute;
            top: -2px; bottom: -2px; left: -2px; right: -2px;
            background: linear-gradient(135deg, var(--primary), var(--cyber-cyan));
            border-radius: 22px;
            z-index: -1;
        }

        /* 页脚 */
        .site-footer {
            background: #07090D;
            border-top: 1px solid var(--border-glass);
            color: var(--text-muted);
            padding: 4.5rem 0 2rem 0;
            font-size: 0.92rem;
        }
        .footer-heading {
            color: #FFFFFF;
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 1.25rem;
        }
        .footer-links li {
            margin-bottom: 0.65rem;
        }
        .footer-links a:hover {
            color: var(--cyber-cyan);
        }

        @media (max-width: 991.98px) {
            .section-title { font-size: 1.8rem; }
            .metric-box { border-right: none; border-bottom: 1px solid var(--border-glass); }
            .header-top-row .text-end { text-align: start !important; margin-top: 0.5rem; }
        }