/* roulang page: index */
:root {
            --primary-gradient: linear-gradient(135deg, #0d9488 0%, #0369a1 100%);
            --accent-gradient: linear-gradient(135deg, #f59e0b 0%, #ea580c 100%);
            --card-shadow: 0 10px 30px -5px rgba(15, 118, 110, 0.08);
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            color: #334155;
            background-color: #f8fafc;
        }
        .hero-bg {
            background-image: linear-gradient(to right, rgba(15, 23, 42, 0.88), rgba(15, 118, 110, 0.75)), url('/assets/images/e3ee00af6f3fb8a4.webp');
            background-size: cover;
            background-position: center;
        }
        .card-custom {
            box-shadow: var(--card-shadow);
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .card-custom:hover {
            transform: translateY(-4px);
            box-shadow: 0 20px 35px -5px rgba(15, 118, 110, 0.15);
        }