/* roulang page: index */
:root {
            --primary: #0A65CC;
            --accent: #00B69B;
            --dark: #111827;
            --body: #374151;
            --border: #E2E8F0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            color: var(--body);
            background-color: #F8FAFC;
        }
        .hero-bg {
            background-image: linear-gradient(rgba(17, 24, 39, 0.82), rgba(17, 24, 39, 0.88)), url('/assets/images/613612371f7bb718.webp');
            background-size: cover;
            background-position: center;
        }
        .section-separator {
            border-bottom: 1px solid var(--border);
        }