/* roulang page: index */
:root {
            --primary-gradient: linear-gradient(135deg, #0F52BA 0%, #1E88E5 100%);
            --accent-orange: #FF7A00;
            --surface-card: #FFFFFF;
            --card-border: rgba(226, 232, 240, 0.9);
            --shadow-subtle: 0 10px 25px -5px rgba(15, 82, 186, 0.08);
            --shadow-hover: 0 20px 35px -5px rgba(15, 82, 186, 0.16);
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
            color: #1E293B;
            background-color: #F8FAFC;
            line-height: 1.7;
            scroll-behavior: smooth;
        }
        .btn-gradient {
            background: linear-gradient(135deg, #FF7A00 0%, #FF9533 100%);
            box-shadow: 0 4px 14px 0 rgba(255, 122, 0, 0.35);
            transition: all 0.25s ease;
        }
        .btn-gradient:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px 0 rgba(255, 122, 0, 0.45);
        }
        .btn-primary {
            background: var(--primary-gradient);
            box-shadow: 0 4px 14px 0 rgba(15, 82, 186, 0.3);
            transition: all 0.25s ease;
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px 0 rgba(15, 82, 186, 0.4);
        }
        .card-modern {
            background: #FFFFFF;
            border: 1px solid var(--card-border);
            border-radius: 20px;
            box-shadow: var(--shadow-subtle);
            transition: all 0.3s ease;
        }
        .card-modern:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .badge-pill {
            display: inline-flex;
            align-items: center;
            padding: 4px 12px;
            border-radius: 9999px;
            font-size: 0.8125rem;
            font-weight: 600;
        }
        .hero-bg {
            background-image: linear-gradient(rgba(11, 19, 43, 0.82), rgba(11, 19, 43, 0.9)), url('/assets/images/97d5fe4e45ceb91c.webp');
            background-size: cover;
            background-position: center;
        }
        .dark-section-bg {
            background-image: linear-gradient(rgba(11, 19, 43, 0.94), rgba(11, 19, 43, 0.98)), url('/assets/images/4bb6fa3f9e89ec3b.webp');
            background-size: cover;
            background-position: center;
        }