/* roulang page: index */
:root {
            --primary: #0A58CA;
            --primary-hover: #084298;
            --accent: #00A389;
            --dark-canvas: #0B192C;
            --text-main: #0F172A;
            --text-body: #334155;
            --text-muted: #64748B;
            --bg-light: #F8FAFC;
            --bg-section: #F1F5F9;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            color: var(--text-body);
            background-color: var(--bg-light);
            text-rendering: optimizeLegibility;
            -webkit-font-smoothing: antialiased;
        }

        .card-shadow {
            box-shadow: 0 4px 20px -4px rgba(15, 23, 42, 0.05);
            transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .card-shadow:hover {
            box-shadow: 0 14px 32px -6px rgba(10, 88, 202, 0.12);
            transform: translateY(-4px);
        }

        details summary::-webkit-details-marker {
            display: none;
        }
        details summary {
            list-style: none;
        }
        details[open] summary svg {
            transform: rotate(180deg);
        }
        details[open] {
            background-color: #F8FAFC;
        }

        .hero-diagonal {
            clip-path: polygon(0 0, 100% 0, 100% 95%, 0 100%);
        }
        @media (max-width: 768px) {
            .hero-diagonal {
                clip-path: none;
            }
        }