/* roulang page: index */
:root {
            --primary: #2563eb;
            --primary-dark: #0f172a;
            --bg-light: #f8fafc;
            --text-main: #1e293b;
            --text-muted: #64748b;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            color: var(--text-main);
            background-color: #ffffff;
            scroll-behavior: smooth;
        }
        .hero-bg {
            background-image: linear-gradient(to bottom, rgba(15, 23, 42, 0.88), rgba(15, 23, 42, 0.94)), url('/assets/images/c26eb62a6e4a5e8f.webp');
            background-size: cover;
            background-position: center;
        }
        .custom-shadow {
            box-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.05);
        }
        .custom-shadow-hover:hover {
            box-shadow: 0 12px 30px -4px rgba(37, 99, 235, 0.12);
            transform: translateY(-3px);
        }
        .transition-base {
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }