/* roulang page: index */
:root {
            --primary: #0D5C75;
            --primary-dark: #093f52;
            --accent-green: #10B981;
            --accent-orange: #F97316;
            --bg-light: #F8FAFC;
            --text-main: #0F172A;
            --text-muted: #475569;
        }
        html {
            scroll-behavior: smooth;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
        }
        body {
            background-color: var(--bg-light);
            color: var(--text-main);
            margin: 0;
            padding: 0;
            line-height: 1.6;
        }
        .hero-diagonal {
            clip-path: polygon(0 0, 100% 0, 100% 86%, 0 100%);
        }
        @media (max-width: 768px) {
            .hero-diagonal {
                clip-path: polygon(0 0, 100% 0, 100% 95%, 0 100%);
            }
        }
        .text-gradient {
            background: linear-gradient(135deg, #38BDF8 0%, #34D399 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .card-hover {
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .card-hover:hover {
            transform: translateY(-4px);
            box-shadow: 0 18px 30px -10px rgba(13, 92, 117, 0.12);
        }
        .line-clamp-2 {
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }