/* roulang page: index */
:root {
            --primary: #0E2A47;
            --primary-dark: #071526;
            --accent: #D4A359;
            --accent-hover: #B88636;
            --bg-body: #F8FAFC;
            --text-main: #0F172A;
            --text-body: #334155;
            --text-muted: #64748B;
            --border-line: #E2E8F0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: var(--bg-body);
            color: var(--text-body);
            line-height: 1.8;
        }
        .hero-bg {
            background-image: linear-gradient(rgba(7, 21, 38, 0.78), rgba(7, 21, 38, 0.88)), url('/assets/images/dbcc0496d028083f.webp');
            background-size: cover;
            background-position: center;
        }
        .deep-vision-bg {
            background-image: linear-gradient(rgba(7, 21, 38, 0.94), rgba(7, 21, 38, 0.96)), url('/assets/images/ee878475f9428484.webp');
            background-size: cover;
            background-position: center;
        }
        .card-custom {
            background: #FFFFFF;
            border: 1px solid rgba(226, 232, 240, 0.9);
            box-shadow: 0 4px 20px -2px rgba(14, 42, 71, 0.05);
            transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
        }
        .card-custom:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 30px -4px rgba(14, 42, 71, 0.12);
            border-color: rgba(212, 163, 89, 0.5);
        }
        .gold-badge {
            background: rgba(212, 163, 89, 0.12);
            color: #B88636;
            border: 1px solid rgba(212, 163, 89, 0.3);
        }