/* roulang page: index */
:root {
            --brand-primary: #0F766E;
            --brand-accent: #10B981;
            --bg-base: #F8FAFC;
            --text-main: #0F172A;
            --text-muted: #475569;
            --border-light: #E2E8F0;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: var(--bg-base);
            color: var(--text-main);
            overflow-x: hidden;
        }
        .text-balanced {
            line-height: 1.75;
        }
        .smooth-shadow {
            box-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.05), 0 2px 6px -1px rgba(15, 23, 42, 0.03);
        }
        .smooth-shadow-lg {
            box-shadow: 0 10px 25px -3px rgba(15, 118, 110, 0.08), 0 4px 10px -2px rgba(15, 23, 42, 0.04);
        }