/* roulang page: index */
:root {
            --primary: #1E40AF;
            --accent: #0284C7;
            --support: #10B981;
            --bg-body: #F8FAFC;
            --text-main: #0F172A;
            --text-muted: #475569;
            --border-color: #E2E8F0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: var(--bg-body);
            color: var(--text-main);
            line-height: 1.65;
            box-sizing: border-box;
            overflow-x: hidden;
        }
        section {
            scroll-margin-top: 5rem;
        }
        .mega-menu {
            transition: all 0.25s ease-in-out;
            opacity: 0;
            visibility: hidden;
            transform: translateY(8px);
        }
        .group:hover .mega-menu {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }
        .hero-bg {
            background-image: linear-gradient(to right, rgba(15, 23, 42, 0.88), rgba(30, 64, 175, 0.78)), url('/assets/images/aed02ed5b3d8648c.jpg');
            background-size: cover;
            background-position: center;
        }
        .banner-mask {
            background-image: linear-gradient(135deg, rgba(30, 64, 175, 0.92) 0%, rgba(2, 132, 199, 0.88) 100%), url('/assets/images/007d91ae342a4f98.png');
            background-size: cover;
            background-position: center;
        }
        .dark-section-bg {
            background-image: radial-gradient(circle at top right, #1e293b, #0f172a);
        }