/* roulang page: index */
:root {
            --primary-orange: #FF5E1E;
            --primary-green: #10B981;
            --dark-bg: #0B0F19;
            --card-radius: 24px;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
            background-color: #F8FAFC;
            color: #1E293B;
            overflow-x: hidden;
        }
        .brand-gradient-text {
            background: linear-gradient(135deg, #FF5E1E 0%, #FF8A00 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .brand-gradient-btn {
            background: linear-gradient(135deg, #FF5E1E 0%, #FF8A00 100%);
            box-shadow: 0 10px 25px -5px rgba(255, 94, 30, 0.4);
            transition: all 0.3s ease;
        }
        .brand-gradient-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 14px 28px -5px rgba(255, 94, 30, 0.5);
        }
        .hero-banner-bg {
            background: linear-gradient(180deg, rgba(15, 23, 42, 0.88) 0%, rgba(11, 15, 25, 0.95) 100%), url('/assets/images/f234d5793139ca13.jpg') center/cover no-repeat;
        }
        .card-soft-shadow {
            box-shadow: 0 10px 30px -5px rgba(15, 23, 42, 0.05), 0 4px 6px -2px rgba(15, 23, 42, 0.02);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .card-soft-shadow:hover {
            transform: translateY(-4px);
            box-shadow: 0 16px 36px -5px rgba(15, 23, 42, 0.09), 0 6px 10px -2px rgba(15, 23, 42, 0.04);
        }
        .faq-content {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
        }
        .faq-item.active .faq-content {
            max-height: 200px;
        }
        .faq-item.active .faq-icon {
            transform: rotate(180deg);
        }