/* roulang page: index */
:root {
            --brand-primary: #FF5A1F;
            --brand-primary-hover: #E04810;
            --brand-secondary: #0F172A;
            --brand-accent: #0284C7;
            --brand-success: #10B981;
            --surface-bg: #F8FAFC;
            --surface-card: #FFFFFF;
            --text-main: #1E293B;
            --text-muted: #64748B;
            --border-color: #E2E8F0;
            --border-radius-base: 8px;
            --box-shadow-soft: 0 10px 30px -10px rgba(15, 23, 42, 0.08);
            --box-shadow-hover: 0 20px 40px -15px rgba(255, 90, 31, 0.16);
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            color: var(--text-main);
            background-color: var(--surface-bg);
            line-height: 1.65;
            overflow-x: hidden;
            padding-bottom: 72px;
        }

        h1, h2, h3, h4, h5, h6 {
            color: var(--brand-secondary);
            font-weight: 700;
            line-height: 1.25;
        }

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

        .btn-brand {
            background-color: var(--brand-primary);
            color: #ffffff;
            border-radius: var(--border-radius-base);
            padding: 12px 28px;
            font-weight: 600;
            border: 1px solid var(--brand-primary);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            min-height: 48px;
        }
        .btn-brand:hover, .btn-brand:focus {
            background-color: var(--brand-primary-hover);
            color: #ffffff;
            border-color: var(--brand-primary-hover);
            box-shadow: 0 6px 18px rgba(255, 90, 31, 0.35);
        }

        .btn-outline-brand {
            background-color: transparent;
            color: var(--brand-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--border-radius-base);
            padding: 12px 24px;
            font-weight: 600;
            min-height: 48px;
        }
        .btn-outline-brand:hover {
            border-color: var(--brand-primary);
            color: var(--brand-primary);
            background-color: #fff;
        }

        /* Top Bar */
        .top-notification-bar {
            background-color: #0b1120;
            color: #94a3b8;
            font-size: 13px;
            padding: 8px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        /* Main Nav */
        .navbar-main {
            background: #ffffff;
            border-bottom: 1px solid var(--border-color);
            padding: 14px 0;
            position: sticky;
            top: 0;
            z-index: 1020;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
        }
        .navbar-brand {
            font-size: 20px;
            font-weight: 800;
            color: var(--brand-secondary) !important;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .navbar-brand-badge {
            background: linear-gradient(135deg, var(--brand-primary), #ff7849);
            color: white;
            width: 36px;
            height: 36px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 8px;
            font-size: 18px;
        }
        .nav-link {
            font-weight: 500;
            color: #334155 !important;
            padding: 8px 16px !important;
        }
        .nav-link:hover, .nav-link.active {
            color: var(--brand-primary) !important;
        }

        /* Hero */
        .hero-section {
            background: linear-gradient(180deg, #FFFFFF 0%, #F1F5F9 100%);
            padding: 80px 0 60px;
            position: relative;
        }
        .hero-banner-card {
            background: white;
            border-radius: var(--border-radius-base);
            border: 1px solid var(--border-color);
            box-shadow: var(--box-shadow-soft);
            padding: 36px;
        }
        .version-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: #FFF0EB;
            color: var(--brand-primary);
            padding: 6px 14px;
            border-radius: 9999px;
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 20px;
        }
        .roadmap-timeline-bar {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: var(--border-radius-base);
            padding: 16px 24px;
            margin-top: 30px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 15px;
        }

        /* Generic Section */
        .content-section {
            padding: 80px 0;
        }
        .content-section.alt-bg {
            background-color: #ffffff;
        }
        .content-section.dark-bg {
            background-color: var(--brand-secondary);
            color: #F8FAFC;
        }
        .content-section.dark-bg h2, 
        .content-section.dark-bg h3,
        .content-section.dark-bg h4 {
            color: #ffffff;
        }
        .section-header {
            margin-bottom: 48px;
        }
        .section-title {
            font-size: 32px;
            margin-bottom: 16px;
        }
        .section-desc {
            color: var(--text-muted);
            max-width: 720px;
            margin: 0 auto;
            font-size: 16px;
        }

        /* Custom Cards */
        .system-card {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: var(--border-radius-base);
            padding: 30px;
            height: 100%;
            transition: all 0.3s ease;
            box-shadow: var(--box-shadow-soft);
        }
        .system-card:hover {
            transform: translateY(-5px);
            border-color: var(--brand-primary);
            box-shadow: var(--box-shadow-hover);
        }
        .card-icon-wrap {
            width: 52px;
            height: 52px;
            border-radius: 8px;
            background: #FFF5F1;
            color: var(--brand-primary);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            margin-bottom: 20px;
        }

        /* Step Process */
        .step-item-card {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: var(--border-radius-base);
            padding: 28px;
            position: relative;
        }
        .step-number {
            font-size: 36px;
            font-weight: 800;
            color: #CBD5E1;
            line-height: 1;
            margin-bottom: 12px;
        }

        /* Compare Table */
        .custom-compare-table {
            background: #ffffff;
            border-radius: var(--border-radius-base);
            border: 1px solid var(--border-color);
            overflow: hidden;
        }
        .custom-compare-table th, .custom-compare-table td {
            padding: 18px 24px;
            vertical-align: middle;
        }

        /* Stats */
        .stat-number-box {
            font-size: 44px;
            font-weight: 800;
            color: var(--brand-primary);
            line-height: 1;
            margin-bottom: 8px;
        }

        /* Tab Pill Navigation */
        .nav-pills-sport .nav-link {
            border-radius: var(--border-radius-base);
            padding: 14px 20px;
            font-weight: 600;
            color: #475569 !important;
            background-color: #ffffff;
            border: 1px solid var(--border-color);
            text-align: left;
            margin-bottom: 12px;
        }
        .nav-pills-sport .nav-link.active {
            background-color: var(--brand-secondary);
            color: #ffffff !important;
            border-color: var(--brand-secondary);
        }

        /* Sticky Footer Conversion */
        .sticky-action-bar {
            position: fixed;
            bottom: 0;
            left: 0;
            width: 100%;
            background: rgba(15, 23, 42, 0.96);
            backdrop-filter: blur(10px);
            z-index: 1030;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding: 12px 0;
            color: #ffffff;
        }

        /* Accordion */
        .accordion-button:not(.collapsed) {
            background-color: #FFF5F1;
            color: var(--brand-primary);
            box-shadow: none;
        }
        .accordion-button:focus {
            box-shadow: none;
            border-color: var(--brand-primary);
        }

        /* Responsive */
        @media (max-width: 991px) {
            .hero-section { padding: 40px 0; }
            .section-title { font-size: 26px; }
            .content-section { padding: 50px 0; }
            .sticky-action-bar .hide-mobile { display: none; }
        }