/* roulang page: index */
:root {
            --primary: #1E40AF;
            --primary-accent: #2563EB;
            --success: #059669;
            --danger: #DC2626;
            --bg-page: #F8FAFC;
            --text-main: #0F172A;
            --text-body: #334155;
            --text-muted: #64748B;
            --border-color: #E2E8F0;
        }

        body {
            font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            background-color: var(--bg-page);
            color: var(--text-body);
            line-height: 1.8;
            -webkit-font-smoothing: antialiased;
        }

        h1, h2, h3, h4, h5, h6 {
            color: var(--text-main);
            line-height: 1.35;
        }

        .hero-diagonal-wrap {
            clip-path: polygon(0 0, 100% 0, 100% calc(100% - 3vw), 0 100%);
        }

        .accordion-content {
            transition: max-height 0.3s cubic-bezier(0, 1, 0, 1);
        }

        .bg-grid-pattern {
            background-image: radial-gradient(rgba(37, 99, 235, 0.08) 1px, transparent 1px);
            background-size: 24px 24px;
        }

        .dark-grid-pattern {
            background-image: radial-gradient(rgba(255, 255, 255, 0.06) 1px, transparent 1px);
            background-size: 28px 28px;
        }