/* roulang page: index */
:root {
            --color-primary: #0A2540;
            --color-primary-dark: #081A2D;
            --color-accent-amber: #D97706;
            --color-accent-emerald: #059669;
            --color-bg-light: #F8FAFC;
            --color-border: #E2E8F0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: var(--color-bg-light);
            color: #334155;
            line-height: 1.75;
            margin: 0;
            padding: 0;
            overflow-x: hidden;
        }
        .container {
            max-width: 1280px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1.25rem;
            padding-right: 1.25rem;
        }
        .btn-cta-amber {
            background-color: var(--color-accent-amber);
            color: #ffffff;
            transition: all 0.3s ease;
            box-shadow: 0 4px 14px rgba(217, 119, 6, 0.35);
        }
        .btn-cta-amber:hover {
            background-color: #B45309;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(217, 119, 6, 0.45);
        }
        .btn-outline-navy {
            border: 1px solid var(--color-primary);
            color: var(--color-primary);
            transition: all 0.3s ease;
        }
        .btn-outline-navy:hover {
            background-color: #F1F5F9;
            transform: translateY(-1px);
        }
        .card-lift {
            transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
            border: 1px solid var(--color-border);
        }
        .card-lift:hover {
            transform: translateY(-4px);
            border-color: #93C5FD;
            box-shadow: 0 12px 24px -8px rgba(10, 37, 64, 0.08);
        }
        .hero-banner {
            background-image: linear-gradient(135deg, rgba(8, 26, 45, 0.94) 0%, rgba(10, 37, 64, 0.92) 100%), url('/assets/images/8f370fab8af865fb.png');
            background-size: cover;
            background-position: center;
        }
        .banner-stripe {
            background-image: linear-gradient(rgba(10, 37, 64, 0.92), rgba(10, 37, 64, 0.92)), url('/assets/images/2a71ba8fc98905f8.jpg');
            background-size: cover;
            background-position: center;
        }
        .accordion-content {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
        }
        .accordion-item.active .accordion-content {
            max-height: 400px;
        }
        .accordion-item.active .accordion-icon {
            transform: rotate(180deg);
        }