/* roulang page: index */
:root {
            --bg-dark: #0B1320;
            --bg-card: #131E30;
            --bg-card-hover: #19273D;
            --bg-light: #F8FAFC;
            --bg-subtle: #F1F5F9;
            --primary: #00E676;
            --primary-glow: rgba(0, 230, 118, 0.25);
            --secondary: #00B0FF;
            --accent-orange: #FF6D00;
            --text-main: #0F172A;
            --text-muted: #64748B;
            --text-light: #F8FAFC;
            --text-light-muted: #94A3B8;
            --border-color: #E2E8F0;
            --border-dark: rgba(255, 255, 255, 0.08);
            --font-mono: "DIN Alternate", "Roboto Mono", SFMono-Regular, Menlo, Monaco, Consolas, monospace;
            --transition-smooth: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
            --radius-md: 14px;
            --radius-lg: 20px;
        }

        body {
            font-family: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
            background-color: var(--bg-light);
            color: var(--text-main);
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

        /* 顶部导航 */
        .site-nav {
            background-color: rgba(11, 19, 32, 0.94);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-dark);
            position: sticky;
            top: 0;
            z-index: 1020;
            transition: var(--transition-smooth);
        }
        .navbar-brand-custom {
            font-size: 1.25rem;
            font-weight: 700;
            color: #FFFFFF !important;
            letter-spacing: -0.02em;
            display: inline-flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
        }
        .brand-icon {
            width: 32px;
            height: 32px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #000;
            font-weight: 800;
            font-size: 1rem;
        }
        .nav-link-custom {
            color: var(--text-light-muted) !important;
            font-size: 0.95rem;
            font-weight: 500;
            padding: 8px 16px !important;
            border-radius: 6px;
            transition: var(--transition-smooth);
            text-decoration: none;
        }
        .nav-link-custom:hover, .nav-link-custom.active {
            color: var(--primary) !important;
            background-color: rgba(255, 255, 255, 0.05);
        }
        .btn-cta-nav {
            background: linear-gradient(135deg, var(--primary), #00C853);
            color: #0B1320 !important;
            font-weight: 700;
            font-size: 0.9rem;
            padding: 9px 22px;
            border-radius: 9999px;
            box-shadow: 0 4px 15px var(--primary-glow);
            border: none;
            transition: var(--transition-smooth);
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .btn-cta-nav:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(0, 230, 118, 0.4);
            color: #0B1320 !important;
        }

        /* Hero 区块 - 5:7 错位现代布局 */
        .hero-section {
            background: radial-gradient(circle at 85% 15%, rgba(0, 176, 255, 0.12) 0%, transparent 40%),
                        radial-gradient(circle at 15% 85%, rgba(0, 230, 118, 0.08) 0%, transparent 45%),
                        var(--bg-dark);
            color: var(--text-light);
            padding: 80px 0 100px;
            position: relative;
            border-bottom: 1px solid var(--border-dark);
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 14px;
            background: rgba(0, 230, 118, 0.1);
            border: 1px solid rgba(0, 230, 118, 0.3);
            border-radius: 9999px;
            color: var(--primary);
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 24px;
        }
        .hero-title {
            font-size: 2.85rem;
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.03em;
            margin-bottom: 20px;
        }
        .hero-title span {
            background: linear-gradient(135deg, #FFFFFF 40%, var(--primary) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .hero-desc {
            font-size: 1.08rem;
            color: var(--text-light-muted);
            line-height: 1.8;
            margin-bottom: 36px;
        }
        .kpi-row {
            display: flex;
            gap: 30px;
            padding-top: 24px;
            border-top: 1px solid var(--border-dark);
        }
        .kpi-item .kpi-num {
            font-family: var(--font-mono);
            font-size: 1.85rem;
            font-weight: 700;
            color: var(--primary);
            line-height: 1;
        }
        .kpi-item .kpi-label {
            font-size: 0.8rem;
            color: var(--text-light-muted);
            margin-top: 6px;
        }

        /* 仿真移动看板卡片 */
        .mobile-board-card {
            background: var(--bg-card);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: 24px;
            padding: 24px;
            box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.6), 0 0 30px rgba(0, 230, 118, 0.05);
            transform: perspective(1000px) rotateY(-4deg) rotateX(2deg);
            transition: var(--transition-smooth);
        }
        .mobile-board-card:hover {
            transform: perspective(1000px) rotateY(0deg) rotateX(0deg);
        }
        .match-badge {
            background: rgba(255, 255, 255, 0.06);
            border-radius: 6px;
            padding: 4px 10px;
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--secondary);
        }
        .match-teams {
            font-size: 1.15rem;
            font-weight: 700;
            color: #FFFFFF;
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin: 16px 0;
        }
        .prob-bar-container {
            margin-bottom: 16px;
        }
        .prob-bar {
            height: 8px;
            border-radius: 9999px;
            background: rgba(255, 255, 255, 0.1);
            overflow: hidden;
            display: flex;
        }
        .prob-win { background: var(--primary); }
        .prob-draw { background: #94A3B8; }
        .prob-loss { background: var(--accent-orange); }

        .param-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 10px;
            margin-top: 18px;
            background: rgba(0, 0, 0, 0.25);
            padding: 12px;
            border-radius: 12px;
        }
        .param-item {
            text-align: center;
        }
        .param-item span {
            display: block;
            font-size: 0.75rem;
            color: var(--text-light-muted);
        }
        .param-item strong {
            font-family: var(--font-mono);
            font-size: 0.95rem;
            color: #FFF;
        }

        /* 通用板块与排版 */
        .section-padding {
            padding: 85px 0;
        }
        .section-header {
            margin-bottom: 50px;
        }
        .section-subtitle {
            text-transform: uppercase;
            font-size: 0.8rem;
            font-weight: 700;
            letter-spacing: 0.1em;
            color: #00897B;
            margin-bottom: 8px;
            display: block;
        }
        .section-title {
            font-size: 2.1rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            color: var(--text-main);
            line-height: 1.3;
        }
        .section-intro {
            font-size: 1.02rem;
            color: var(--text-muted);
            max-width: 800px;
            margin-top: 14px;
        }

        /* 卡片风格 */
        .card-custom {
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 28px;
            transition: var(--transition-smooth);
            height: 100%;
            position: relative;
            box-shadow: 0 4px 15px -2px rgba(11, 19, 32, 0.03);
        }
        .card-custom:hover {
            transform: translateY(-4px);
            box-shadow: 0 16px 30px -4px rgba(11, 19, 32, 0.08);
            border-color: rgba(0, 230, 118, 0.5);
        }
        .card-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: #E8F5E9;
            color: #1B5E20;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.35rem;
            margin-bottom: 20px;
        }

        /* 标签与徽章 */
        .status-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 10px;
            border-radius: 6px;
            font-size: 0.75rem;
            font-weight: 600;
        }
        .status-badge.live {
            background: #E8F5E9;
            color: #2E7D32;
        }
        .status-badge.progress {
            background: #E3F2FD;
            color: #1565C0;
        }
        .status-badge.plan {
            background: #FFF3E0;
            color: #E65100;
        }

        /* 对比表格/双栏 */
        .compare-box {
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-color);
        }
        .compare-col-old {
            background: #F8FAFC;
            padding: 36px;
        }
        .compare-col-model {
            background: var(--bg-dark);
            color: var(--text-light);
            padding: 36px;
            position: relative;
        }

        /* 时间线 */
        .timeline-item {
            position: relative;
            padding-left: 32px;
            padding-bottom: 30px;
            border-left: 2px solid #E2E8F0;
        }
        .timeline-item:last-child {
            border-left: 2px solid transparent;
            padding-bottom: 0;
        }
        .timeline-dot {
            position: absolute;
            left: -9px;
            top: 0;
            width: 16px;
            height: 16px;
            border-radius: 50%;
            background: var(--primary);
            border: 3px solid #FFF;
            box-shadow: 0 0 0 2px var(--primary);
        }

        /* 手风琴 FAQ */
        .accordion-item {
            border: 1px solid var(--border-color);
            border-radius: 10px !important;
            margin-bottom: 12px;
            overflow: hidden;
        }
        .accordion-button {
            font-weight: 600;
            color: var(--text-main);
            background-color: #FFFFFF;
            padding: 18px 24px;
        }
        .accordion-button:not(.collapsed) {
            color: #0E5A35;
            background-color: #F1F8F5;
            box-shadow: none;
        }
        .accordion-body {
            padding: 20px 24px;
            color: #475569;
            font-size: 0.95rem;
            line-height: 1.8;
            background-color: #FFFFFF;
        }

        /* 页脚 */
        .site-footer {
            background: var(--bg-dark);
            color: var(--text-light-muted);
            padding: 60px 0 30px;
            border-top: 1px solid var(--border-dark);
            font-size: 0.9rem;
        }
        .site-footer a {
            color: var(--text-light-muted);
            text-decoration: none;
            transition: var(--transition-smooth);
        }
        .site-footer a:hover {
            color: var(--primary);
        }

        /* 移动端固定底栏 */
        .mobile-bottom-bar {
            display: none;
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            background: rgba(11, 19, 32, 0.96);
            backdrop-filter: blur(12px);
            padding: 12px 16px;
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            z-index: 1030;
        }

        @media (max-width: 991.98px) {
            .hero-title { font-size: 2.2rem; }
            .mobile-board-card { transform: none; margin-top: 40px; }
            .section-padding { padding: 55px 0; }
        }

        @media (max-width: 767.98px) {
            .mobile-bottom-bar { display: flex; align-items: center; justify-content: space-between; }
            body { padding-bottom: 70px; }
            .hero-title { font-size: 1.85rem; }
            .kpi-row { flex-wrap: wrap; gap: 15px; }
            .section-title { font-size: 1.6rem; }
        }