/* roulang page: index */
:root {
            --primary: #0F2D3C;
            --accent: #0D9488;
            --warning: #F59E0B;
            --darkslate: #06151E;
            --softbg: #F8FAFC;
            --text-main: #0F172A;
            --text-sub: #475569;
            --border-color: #E2E8F0;
        }
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
            scroll-behavior: smooth;
        }
        body {
            font-family: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            color: var(--text-main);
            background-color: var(--softbg);
            overflow-x: hidden;
            line-height: 1.65;
        }
        .container-custom {
            max-width: 1240px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1.25rem;
            padding-right: 1.25rem;
        }
        .site-section {
            padding: 80px 0;
        }
        @media (max-width: 768px) {
            .site-section {
                padding: 48px 0;
            }
        }
        .coupon-ticket {
            position: relative;
            background: linear-gradient(135deg, #0F2D3C 0%, #173f54 100%);
            border-left: 6px dashed #0D9488;
        }
        .coupon-ticket::before, .coupon-ticket::after {
            content: '';
            position: absolute;
            left: -12px;
            width: 20px;
            height: 20px;
            background: #F8FAFC;
            border-radius: 50%;
        }
        .coupon-ticket::before { top: 20px; }
        .coupon-ticket::after { bottom: 20px; }
        .card-trans {
            transition: transform 0.25s ease, box-shadow 0.25s ease;
        }
        .card-trans:hover {
            transform: translateY(-4px);
            box-shadow: 0 16px 30px -10px rgba(15, 45, 60, 0.12);
        }
        details > summary::-webkit-details-marker {
            display: none;
        }
        details summary {
            list-style: none;
        }