/* roulang page: index */
:root {
            --brand-primary: #0F766E;
            --brand-accent: #F97316;
            --text-main: #0F172A;
            --text-muted: #64748B;
            --bg-light: #F8FAFC;
        }
        html { scroll-behavior: smooth; font-family: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif; }
        body { color: #334155; background-color: #FFFFFF; line-height: 1.75; }
        .hero-banner-bg {
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.92) 0%, rgba(15, 118, 110, 0.88) 100%), url('/assets/images/86a0f639a2c7dfc9.webp') center/cover no-repeat;
        }
        .bento-card {
            transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .bento-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 24px -10px rgba(15, 118, 110, 0.15);
        }
        .accordion-content {
            transition: max-height 0.3s ease-out, opacity 0.2s ease-in;
            max-height: 0;
            overflow: hidden;
            opacity: 0;
        }
        .accordion-content.active {
            max-height: 500px;
            opacity: 1;
        }