/* roulang page: index */
:root {
            --brand-green: #00D084;
            --brand-navy: #0F172A;
            --brand-dark: #0B0F19;
            --brand-red: #FF4D4F;
            --bg-light: #F8FAFC;
            --border-light: #E2E8F0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
            color: #1E293B;
            background-color: var(--bg-light);
            overflow-x: hidden;
        }
        .hero-poster-glow {
            box-shadow: 0 20px 50px -10px rgba(0, 208, 132, 0.3);
        }
        .card-custom {
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .card-custom:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 30px -4px rgba(15, 23, 42, 0.08);
            border-color: rgba(0, 208, 132, 0.4);
        }
        .faq-content {
            transition: max-height 0.3s ease-out, opacity 0.3s ease;
            max-height: 0;
            opacity: 0;
            overflow: hidden;
        }
        .faq-content.open {
            max-height: 200px;
            opacity: 1;
        }
        .arrow-rotate {
            transition: transform 0.3s ease;
        }
        .arrow-rotate.open {
            transform: rotate(180deg);
        }