/* roulang page: index */
:root {
            --primary: #0F4C81;
            --secondary: #1E40AF;
            --accent: #F97316;
            --bg-light: #F8FAFC;
            --bg-muted: #F1F5F9;
            --dark: #0F172A;
            --text-main: #1E293B;
            --text-muted: #64748B;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            color: var(--text-main);
            background-color: #ffffff;
            font-family: system-ui, -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
            overflow-x: hidden;
        }
        .hero-bg-overlay {
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.94) 0%, rgba(15, 76, 129, 0.88) 100%);
        }
        .card-hover {
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .card-hover:hover {
            transform: translateY(-5px);
            box-shadow: 0 12px 24px -8px rgba(15, 76, 129, 0.15);
        }
        .sticky-nav {
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
        }
        .text-balance {
            text-wrap: balance;
        }