/* roulang page: index */
:root {
            --color-primary: #0F2D2E;
            --color-secondary: #091A1A;
            --color-accent: #C59B27;
            --color-bg-light: #F8F9FA;
            --color-text-main: #1A202C;
            --color-text-muted: #4A5568;
            --color-border: #E2E8F0;
        }

        body {
            font-family: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            color: var(--color-text-main);
            background-color: #FFFFFF;
            overflow-x: hidden;
            line-height: 1.75;
        }

        .hero-bg-overlay {
            background-image: linear-gradient(135deg, rgba(15, 45, 46, 0.95) 0%, rgba(9, 26, 26, 0.92) 100%), url('/assets/images/b6952d88b4b122a0.png');
            background-size: cover;
            background-position: center;
        }

        .dark-pattern-bg {
            background-image: linear-gradient(180deg, rgba(9, 26, 26, 0.97) 0%, rgba(15, 45, 46, 0.97) 100%), url('/assets/images/4d30287c30019807.jpg');
            background-size: cover;
            background-position: center;
        }

        .hover-card-lift {
            transition: transform 0.28s ease, box-shadow 0.28s ease, border-color 0.28s ease;
        }
        .hover-card-lift:hover {
            transform: translateY(-4px);
            box-shadow: 0 16px 32px -8px rgba(15, 45, 46, 0.12);
            border-color: #C59B27;
        }

        .faq-content {
            transition: max-height 0.3s ease, opacity 0.3s ease;
            max-height: 0;
            overflow: hidden;
            opacity: 0;
        }
        .faq-item.active .faq-content {
            max-height: 280px;
            opacity: 1;
        }
        .faq-item.active .faq-chevron {
            transform: rotate(180deg);
        }