/* roulang page: index */
:root {
            --color-primary: #0F3668;
            --color-primary-light: #1D63D8;
            --color-accent: #F97316;
            --color-bg-light: #F8FAFC;
            --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
        }
        body {
            font-family: var(--font-family);
            color: #1E293B;
            background-color: #FFFFFF;
            scroll-behavior: smooth;
        }
        .text-balance {
            text-wrap: balance;
        }
        .accordion-arrow {
            transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }
        details[open] .accordion-arrow {
            transform: rotate(180deg);
        }
        .glass-panel {
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
        }
        .glass-card-dark {
            background: rgba(255, 255, 255, 0.06);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid rgba(255, 255, 255, 0.12);
        }