/* roulang page: index */
:root {
            --primary: #1A1A1A;
            --accent: #00E5FF;
            --accent-hover: #00C4DB;
            --bg-light: #F8F9FA;
            --text-main: #2D3748;
            --radius-sm: 8px;
            --radius-md: 12px;
            --shadow-subtle: 0 4px 20px rgba(0,0,0,0.06);
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            color: #1A1A1A;
            background-color: #FAFAFA;
        }
        .hero-pattern {
            background-image: linear-gradient(rgba(26, 26, 26, 0.88), rgba(26, 26, 26, 0.94)), url('/assets/images/295d543aa37adbb3.webp');
            background-size: cover;
            background-position: center;
        }
        .deep-section-bg {
            background-image: linear-gradient(rgba(18, 18, 18, 0.92), rgba(18, 18, 18, 0.96)), url('/assets/images/da3d969adf8986b8.webp');
            background-size: cover;
            background-position: center;
        }
        .cta-banner-bg {
            background-image: linear-gradient(rgba(26, 26, 26, 0.85), rgba(15, 23, 42, 0.92)), url('/assets/images/4d756d6295239a1f.png');
            background-size: cover;
            background-position: center;
        }
        .card-lift {
            transition: transform 0.28s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.28s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .card-lift:hover {
            transform: translateY(-4px);
            box-shadow: 0 16px 32px rgba(0, 0, 0, 0.12);
        }
        .nav-blur {
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            background-color: rgba(26, 26, 26, 0.92);
        }