/* roulang page: index */
:root {
            --primary: #1e40af;
            --secondary: #0284c7;
            --accent: #0d9488;
            --bg-body: #ffffff;
            --text-main: #0f172a;
            --text-muted: #64748b;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            color: var(--text-main);
            background-color: var(--bg-body);
            overflow-x: hidden;
        }
        .text-gradient {
            background: linear-gradient(135deg, #1e40af 0%, #0284c7 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .hero-bg-overlay {
            background: linear-gradient(180deg, rgba(11, 19, 43, 0.88) 0%, rgba(15, 23, 42, 0.94) 100%);
        }