/* roulang page: index */
:root {
            --primary: #1e40af;
            --primary-accent: #0284c7;
            --bg-light: #f8fafc;
            --text-main: #0f172a;
            --text-muted: #64748b;
            --border-color: #e2e8f0;
            --radius-main: 1rem;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: var(--bg-light);
            color: var(--text-main);
            overflow-x: hidden;
        }
        .text-gradient {
            background: linear-gradient(135deg, #1e40af 0%, #0284c7 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .card-custom {
            background: #ffffff;
            border: 1px solid rgba(226, 232, 240, 0.8);
            border-radius: var(--radius-main);
            box-shadow: 0 4px 20px -4px rgba(30,64,175,0.05);
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .card-custom:hover {
            transform: translateY(-4px);
            box-shadow: 0 14px 28px -6px rgba(30,64,175,0.12);
            border-color: rgba(147, 197, 253, 0.6);
        }
        .badge-pill {
            display: inline-flex;
            align-items: center;
            padding: 0.35rem 0.85rem;
            border-radius: 9999px;
            font-size: 0.8125rem;
            font-weight: 500;
        }
        /* 手风琴平滑过度 */
        details summary::-webkit-details-marker {
            display:none;
        }
        details[open] summary .faq-icon {
            transform: rotate(180deg);
        }