/* roulang page: index */
:root {
            --primary: #0F172A;
            --accent-cyan: #0EA5E9;
            --accent-emerald: #10B981;
            --accent-amber: #F59E0B;
            --text-main: #334155;
            --text-title: #0F172A;
            --border-color: #E2E8F0;
        }
        body {
            color: var(--text-main);
            font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
            line-height: 1.75;
            background-color: #FFFFFF;
            overflow-x: hidden;
        }
        .hero-pattern {
            background-image: linear-gradient(135deg, rgba(15, 23, 42, 0.95) 0%, rgba(9, 13, 22, 0.92) 100%), url('/assets/images/6a14a55ef5589b2e.webp');
            background-size: cover;
            background-position: center;
        }
        .deep-dark-pattern {
            background-image: linear-gradient(180deg, rgba(9, 13, 22, 0.98) 0%, rgba(15, 23, 42, 0.95) 100%), url('/assets/images/c697a8030f4f907a.webp');
            background-size: cover;
            background-position: center;
        }
        .card-hover-effect {
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .card-hover-effect:hover {
            transform: translateY(-4px);
            box-shadow: 0 16px 30px -10px rgba(15, 23, 42, 0.12);
        }
        .gradient-border {
            border-image: linear-gradient(to right, #0EA5E9, #10B981) 1;
        }
        .smooth-scroll {
            scroll-behavior: smooth;
        }