/* roulang page: index */
:root {
            --primary: #F59E0B;
            --primary-hover: #D97706;
            --secondary: #0F172A;
            --accent: #10B981;
            --bg-light: #F8FAFC;
            --text-main: #1E293B;
            --text-muted: #64748B;
            --border-color: #E2E8F0;
        }
        body {
            font-family: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            color: var(--text-main);
            background-color: var(--bg-light);
            line-height: 1.68;
            -webkit-font-smoothing: antialiased;
        }
        .hero-bg {
            background-image: linear-gradient(to right, rgba(9, 13, 22, 0.95), rgba(15, 23, 42, 0.82)), url('/assets/images/d725ddc3a5aa14e7.webp');
            background-size: cover;
            background-position: center;
        }
        .dark-strip-bg {
            background-image: linear-gradient(rgba(15, 23, 42, 0.96), rgba(9, 13, 22, 0.98)), url('/assets/images/35e009ecc4df648f.webp');
            background-size: cover;
            background-position: center;
        }
        .cta-banner-bg {
            background-image: linear-gradient(135deg, rgba(15, 23, 42, 0.97) 0%, rgba(30, 41, 59, 0.95) 100%), url('/assets/images/88f43be908127807.webp');
            background-size: cover;
            background-position: center;
        }
        .tab-btn.active {
            background-color: #F59E0B;
            color: #0F172A;
            font-weight: 600;
        }