/* roulang page: index */
:root {
            --primary: #0284C7;
            --primary-dark: #0369A1;
            --accent: #F59E0B;
            --accent-hover: #D97706;
            --bg-slate: #F8FAFC;
            --text-main: #0F172A;
            --text-muted: #64748B;
            --border-light: #E2E8F0;
        }

        html {
            scroll-behavior: smooth;
            font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
            line-height: 1.75;
            color: var(--text-main);
        }

        .hero-bg {
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.94) 0%, rgba(2, 132, 199, 0.88) 100%), url('/assets/images/5ad7a4820a5e92ad.webp') center/cover no-repeat;
        }

        .dark-section-bg {
            background: linear-gradient(180deg, #0F172A 0%, #1E293B 100%), url('/assets/images/2d85a1bdd706c6d3.webp') center/cover no-repeat;
        }

        .cta-banner-bg {
            background: linear-gradient(135deg, #0284C7 0%, #0369A1 100%), url('/assets/images/74c99e4925606b28.webp') center/cover no-repeat;
        }

        .feature-card {
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            border: 1px solid var(--border-light);
        }

        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
            border-color: var(--primary);
        }

        .timeline-step::after {
            content: '';
            position: absolute;
            top: 24px;
            right: -50%;
            width: 100%;
            height: 2px;
            border-top: 2px dashed #CBD5E1;
            z-index: 1;
        }

        .timeline-step:last-child::after {
            display: none;
        }

        @media (max-width: 1023px) {
            .timeline-step::after {
                display: none;
            }
        }