/* roulang page: index */
:root {
            --bg-primary: #0A1412;
            --bg-secondary: #0F241D;
            --surface-card: #152E26;
            --accent-gold: #D4AF37;
            --accent-gold-hover: #E5C158;
            --text-main: #FFFFFF;
            --text-sub: #CBD5E1;
            --text-muted: #94A3B8;
            --border-dark: rgba(212, 175, 55, 0.2);
        }
        html {
            scroll-behavior: smooth;
            font-family: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
        }
        body {
            background-color: #080D0C;
            color: #F8FAFC;
            overflow-x: hidden;
        }
        .gold-gradient-text {
            background: linear-gradient(135deg, #FFF1CA 0%, #D4AF37 50%, #AA820A 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .btn-gold {
            background: linear-gradient(135deg, #E5C158 0%, #D4AF37 100%);
            color: #0A1412;
            font-weight: 600;
            transition: all 0.3s ease;
        }
        .btn-gold:hover {
            box-shadow: 0 0 20px rgba(212, 175, 55, 0.45);
            transform: translateY(-2px);
        }
        .nav-blur {
            backdrop-filter: blur(12px);
            background-color: rgba(10, 20, 18, 0.92);
        }
        .card-glow {
            border: 1px solid var(--border-dark);
            background: linear-gradient(180deg, rgba(21, 46, 38, 0.7) 0%, rgba(11, 25, 20, 0.9) 100%);
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .card-glow:hover {
            border-color: rgba(212, 175, 55, 0.6);
            transform: translateY(-4px);
            box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.5), 0 0 15px rgba(212, 175, 55, 0.15);
        }
        .hero-banner-bg {
            background-image: linear-gradient(to right, rgba(8, 13, 12, 0.95) 20%, rgba(15, 36, 29, 0.75) 60%, rgba(8, 13, 12, 0.95) 100%), url('/assets/images/7c44dd17313e69b2.jpg');
            background-size: cover;
            background-position: center;
        }
        .section-alt {
            background-color: #0D1B17;
        }
        .tab-btn.active {
            border-color: #D4AF37;
            color: #D4AF37;
            background-color: rgba(212, 175, 55, 0.1);
        }