/* roulang page: index */
:root {
            --primary: #4F46E5;
            --primary-dark: #4338CA;
            --accent: #059669;
            --bg-base: #0F172A;
            --text-main: #1E293B;
            --text-muted: #64748B;
            --border-light: #E2E8F0;
            --radius-box: 1rem;
        }

        body {
            font-family: system-ui, -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
            color: var(--text-main);
            background-color: #F8FAFC;
            overflow-x: hidden;
        }

        /* 斜切装饰首屏背景 */
        .hero-slant {
            clip-path: polygon(0 0, 100% 0, 100% 90%, 0 100%);
        }

        @media (max-width: 768px) {
            .hero-slant {
                clip-path: polygon(0 0, 100% 0, 100% 96%, 0 100%);
            }
        }

        /* 状态与卡片动效微交互 */
        .card-lift {
            transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.3s cubic-bezier(0.16, 1, 0.3, 1);
        }
        .card-lift:hover {
            transform: translateY(-4px);
            box-shadow: 0 20px 25px -5px rgba(15, 23, 42, 0.08), 0 8px 10px -6px rgba(15, 23, 42, 0.04);
        }

        /* 手风琴原生过渡体验 */
        details > summary {
            list-style: none;
        }
        details > summary::-webkit-details-marker {
            display: none;
        }
        details[open] summary svg {
            transform: rotate(180deg);
        }