/* roulang page: index */
:root {
            --primary: #1E40AF;
            --primary-dark: #172554;
            --bg-light: #F8FAFC;
            --bg-ice: #F0F6FE;
            --text-main: #0F172A;
            --text-muted: #64748B;
            --shadow-subtle: 0 4px 20px -2px rgba(15, 23, 42, 0.05);
            --shadow-hover: 0 12px 28px -4px rgba(30, 64, 175, 0.12);
        }
        body {
            font-family: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            color: #334155;
            background-color: #F8FAFC;
            line-height: 1.75;
            overflow-x: hidden;
        }
        .card-custom {
            box-shadow: var(--shadow-subtle);
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .card-custom:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .carousel-slide {
            display: none;
            opacity: 0;
            transition: opacity 0.6s ease-in-out;
        }
        .carousel-slide.active {
            display: block;
            opacity: 1;
        }
        .section-tag {
            display: inline-flex;
            align-items: center;
            padding: 0.25rem 0.85rem;
            font-size: 0.85rem;
            font-weight: 600;
            border-radius: 9999px;
            letter-spacing: 0.05em;
        }
        .gradient-brand {
            background: linear-gradient(135deg, #1E40AF 0%, #172554 100%);
        }