/* roulang page: index */
:root {
            --primary: #0F4C81;
            --accent-green: #00B074;
            --accent-orange: #FF6B35;
            --dark-bg: #0B192C;
            --light-bg: #F8FAFC;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
            color: #334155;
            line-height: 1.75;
            background-color: #FFFFFF;
        }
        .hero-bg {
            background: linear-gradient(135deg, rgba(11, 25, 44, 0.92) 0%, rgba(15, 76, 129, 0.88) 100%), url('/assets/images/b76d7c00193e3b9a.jpg') center/cover no-repeat;
        }
        .pattern-bg {
            background-color: #F8FAFC;
            background-image: radial-gradient(#CBD5E1 1px, transparent 1px);
            background-size: 24px 24px;
        }
        .section-dark {
            background: linear-gradient(180deg, #0B192C 0%, #081220 100%);
        }
        .card-hover {
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .card-hover:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 24px -10px rgba(15, 76, 129, 0.15);
        }