/* roulang page: index */
:root {
            --primary: #0f766e;
            --primary-hover: #0d9488;
            --accent: #10b981;
            --dark: #0f172a;
            --gray-subtle: #f8fafc;
            --text-main: #020617;
            --text-muted: #475569;
            --border-soft: #e2e8f0;
        }
        body {
            font-family: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            color: var(--text-main);
            background-color: #ffffff;
            line-height: 1.65;
            -webkit-font-smoothing: antialiased;
        }
        .text-tight {
            letter-spacing: -0.02em;
        }
        .nav-blur {
            backdrop-filter: blur(12px);
            background-color: rgba(255, 255, 255, 0.92);
        }
        .badge-soft {
            background-color: #f0fdfa;
            color: #0f766e;
            border: 1px solid #ccfbf1;
        }
        .transition-standard {
            transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
        }
        .card-hover:hover {
            transform: translateY(-3px);
            box-shadow: 0 16px 32px -8px rgba(15, 118, 110, 0.12);
        }