/* roulang page: index */
:root {
            --primary: #0F4C81;
            --accent: #FF6B35;
            --dark: #141A29;
            --light-bg: #F8FAFC;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
            color: #334155;
            line-height: 1.75;
            background-color: #FFFFFF;
        }
        html {
            scroll-behavior: smooth;
        }
        .text-balance {
            text-wrap: balance;
        }
        .accordion-content {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out, padding 0.3s ease;
        }
        .accordion-content.open {
            max-height: 300px;
        }