/* roulang page: index */
:root {
            --color-primary: #1E40AF;
            --color-primary-dark: #1E3A8A;
            --color-accent: #0284C7;
            --color-accent-emerald: #10B981;
            --color-bg-base: #F8FAFC;
            --color-card-bg: #FFFFFF;
            --color-dark-bg: #0F172A;
            --color-text-main: #0F172A;
            --color-text-body: #334155;
            --color-text-muted: #64748B;
            --color-border: #E2E8F0;
            --shadow-card: 0 1px 3px 0 rgba(15, 23, 42, 0.05), 0 1px 2px -1px rgba(15, 23, 42, 0.05);
            --shadow-hover: 0 12px 24px -4px rgba(30, 64, 175, 0.08), 0 4px 6px -2px rgba(15, 23, 42, 0.03);
            --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--color-bg-base);
            color: var(--color-text-body);
            line-height: 1.65;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

        .custom-card {
            background-color: var(--color-card-bg);
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-card);
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .custom-card:hover {
            transform: translateY(-4px);
            border-color: #BFDBFE;
            box-shadow: var(--shadow-hover);
        }

        .hero-slide {
            transition: opacity 0.8s ease-in-out, transform 0.8s ease-out;
        }

        /* 隐藏滚动条但保留功能 */
        .no-scrollbar::-webkit-scrollbar {
            display: none;
        }
        .no-scrollbar {
            -ms-overflow-style: none;
            scrollbar-width: none;
        }

        /* 手风琴平滑展开动画辅助 */
        .accordion-content {
            transition: max-height 0.35s ease-out, opacity 0.3s ease-out;
            max-height: 0;
            opacity: 0;
            overflow: hidden;
        }
        .accordion-content.active {
            max-height: 500px;
            opacity: 1;
        }

        .cta-gradient {
            background: linear-gradient(135deg, #EFF6FF 0%, #FFFFFF 100%);
        }