/* roulang page: index */
:root {
            --color-bg-base: #F8FAFC;
            --color-text-main: #0F172A;
            --color-text-muted: #64748B;
            --color-primary: #1E40AF;
            --color-cyan: #06B6D4;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: var(--color-bg-base);
            color: var(--color-text-main);
            overflow-x: hidden;
        }
        .hero-banner-gradient {
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.94) 0%, rgba(30, 64, 175, 0.88) 55%, rgba(6, 182, 212, 0.82) 100%);
        }
        .cta-brand-gradient {
            background: linear-gradient(135deg, #0F172A 0%, #1E40AF 60%, #06B6D4 100%);
        }
        .timeline-line::before {
            content: '';
            position: absolute;
            top: 28px;
            left: 0;
            right: 0;
            height: 2px;
            background: #E2E8F0;
            z-index: 1;
        }
        @media (max-width: 1024px) {
            .timeline-line::before {
                display: none;
            }
        }
        details summary::-webkit-details-marker {
            display: none;
        }