/* roulang page: index */
:root {
            --primary: #3B28CC;
            --primary-light: #6366F1;
            --accent: #06D6A0;
            --neon: #FF5E7E;
            --bg-dark: #0B0F19;
            --bg-card: #111827;
            --text-main: #0F172A;
            --text-muted: #475569;
            --text-light: #F8FAFC;
            --radius-xl: 1rem;
            --radius-2xl: 1.5rem;
            --radius-3xl: 2rem;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            color: var(--text-main);
            background-color: #FFFFFF;
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }

        .hero-mesh {
            background-color: #0B0F19;
            background-image: 
                radial-gradient(at 0% 0%, rgba(59, 40, 204, 0.4) 0px, transparent 50%),
                radial-gradient(at 100% 100%, rgba(99, 102, 241, 0.25) 0px, transparent 50%),
                radial-gradient(at 50% 50%, rgba(6, 214, 160, 0.1) 0px, transparent 50%);
        }

        .glass-header {
            background: rgba(255, 255, 255, 0.88);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.8);
        }

        .dark-glass {
            background: rgba(17, 24, 39, 0.7);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid rgba(255, 255, 255, 0.08);
        }

        .badge-capsule {
            display: inline-flex;
            align-items: center;
            padding: 0.25rem 0.85rem;
            font-size: 0.75rem;
            font-weight: 600;
            border-radius: 9999px;
            letter-spacing: 0.025em;
        }

        /* 手风琴平滑过度 */
        .faq-content {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease-out, padding 0.35s ease;
        }
        .faq-item.active .faq-content {
            max-height: 240px;
            padding-top: 0.75rem;
        }
        .faq-item.active .faq-icon {
            transform: rotate(45deg);
        }

        /* 移动端菜单切换 */
        #mobile-drawer {
            transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }