/* roulang page: index */
:root {
            --brand-primary: #f97316;
            --brand-secondary: #0d9488;
            --bg-warm: #fafaf9;
            --bg-card: #ffffff;
            --text-main: #1c1917;
            --text-muted: #78716c;
        }
        html {
            scroll-behavior: smooth;
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
        }
        body {
            background-color: var(--bg-warm);
            color: var(--text-main);
            line-height: 1.75;
        }
        .card-shadow {
            box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.05);
            transition: transform 0.2s ease, box-shadow 0.2s ease;
        }
        .card-shadow:hover {
            transform: translateY(-4px);
            box-shadow: 0 15px 35px -8px rgba(249, 115, 22, 0.12);
        }