/* roulang page: index */
:root {
            --primary-navy: #0f2c59;
            --primary-dark: #0b192c;
            --accent-emerald: #10b981;
            --accent-amber: #f59e0b;
            --bg-light: #f8fafc;
            --text-main: #0f172a;
            --text-muted: #475569;
            --border-color: #e2e8f0;
        }
        body {
            font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Heiti SC", sans-serif;
            background-color: var(--bg-light);
            color: var(--text-main);
            overflow-x: hidden;
        }
        .hero-overlay {
            background: linear-gradient(135deg, rgba(15, 44, 89, 0.95) 0%, rgba(11, 25, 44, 0.92) 100%);
        }
        .card-hover {
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .card-hover:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 24px -10px rgba(15, 44, 89, 0.15);
        }
        .step-line::before {
            content: '';
            position: absolute;
            top: 24px;
            left: 0;
            right: 0;
            height: 2px;
            background: #e2e8f0;
            z-index: 0;
        }
        @media (max-width: 768px) {
            .step-line::before {
                display: none;
            }
        }