/* roulang page: index */
:root {
            --primary-gradient: linear-gradient(135deg, #6366F1 0%, #3B82F6 100%);
            --accent-glow: 0 0 20px rgba(6, 182, 212, 0.4);
            --bg-light: #F8FAFC;
        }
        body {
            font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
            background-color: var(--bg-light);
            color: #1E293B;
            overflow-x: hidden;
        }
        .text-gradient {
            background: linear-gradient(135deg, #6366F1 0%, #3B82F6 50%, #06B6D4 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .bg-brand-gradient {
            background: linear-gradient(135deg, #6366F1 0%, #3B82F6 100%);
        }
        .hero-bg-overlay {
            background: linear-gradient(180deg, rgba(15, 23, 42, 0.88) 0%, rgba(30, 27, 75, 0.95) 100%);
        }
        .faq-content {
            transition: max-height 0.3s ease-in-out, opacity 0.3s ease-in-out;
        }
        .faq-content.closed {
            max-height: 0;
            opacity: 0;
            overflow: hidden;
        }
        .faq-content.open {
            max-height: 200px;
            opacity: 1;
        }
        .coupon-cutout {
            position: relative;
            background: radial-gradient(circle at left, transparent 10px, white 11px) left,
                        radial-gradient(circle at right, transparent 10px, white 11px) right;
            background-size: 51% 100%;
            background-repeat: no-repeat;
        }