/* roulang page: index */
:root {
            --bg-canvas: #0B0E14;
            --bg-alt: #121721;
            --bg-surface: #181F2C;
            --bg-surface-elevated: #1F2737;
            --accent-gold: #C5A880;
            --accent-gold-light: #E6C894;
            --accent-gold-border: rgba(197, 168, 128, 0.22);
            --text-primary: #FFFFFF;
            --text-secondary: #94A3B8;
            --text-muted: #64748B;
            --radius-sm: 4px;
            --radius-md: 8px;
            --shadow-lux: 0 20px 40px -15px rgba(0, 0, 0, 0.7), 0 0 25px rgba(197, 168, 128, 0.08);
        }

        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
            scroll-behavior: smooth;
        }

        body {
            background-color: var(--bg-canvas);
            color: var(--text-secondary);
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            line-height: 1.75;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }

        /* 标题排版规范 */
        h1, h2, h3, h4, h5, h6 {
            color: var(--text-primary);
            font-weight: 600;
            letter-spacing: -0.02em;
        }

        .gold-gradient-text {
            background: linear-gradient(135deg, #FFFFFF 0%, #E6C894 65%, #C5A880 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .gold-border {
            border: 1px solid var(--accent-gold-border);
        }

        .gold-border-hover:hover {
            border-color: rgba(230, 200, 148, 0.5);
            box-shadow: 0 0 20px rgba(197, 168, 128, 0.15);
        }

        /* 卡片微动效 */
        .lux-card {
            background-color: var(--bg-surface);
            border: 1px solid var(--accent-gold-border);
            border-radius: var(--radius-md);
            transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.3s ease, border-color 0.3s ease;
        }

        .lux-card:hover {
            transform: translateY(-4px);
            border-color: rgba(230, 200, 148, 0.4);
            box-shadow: var(--shadow-lux);
        }

        /* 按钮与交互标签 */
        .btn-gold {
            background: linear-gradient(135deg, #E6C894 0%, #C5A880 100%);
            color: #0B0E14;
            font-weight: 600;
            border-radius: var(--radius-sm);
            padding: 12px 28px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            transition: all 0.25s ease;
            box-shadow: 0 4px 14px rgba(197, 168, 128, 0.25);
        }

        .btn-gold:hover {
            filter: brightness(1.08);
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(197, 168, 128, 0.35);
        }

        .btn-outline-gold {
            background: transparent;
            color: var(--accent-gold-light);
            border: 1px solid var(--accent-gold-border);
            border-radius: var(--radius-sm);
            padding: 12px 28px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            transition: all 0.25s ease;
        }

        .btn-outline-gold:hover {
            border-color: var(--accent-gold-light);
            background-color: rgba(197, 168, 128, 0.08);
            color: #FFFFFF;
        }

        /* FAQ 手风琴动画 */
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        }

        .faq-item.active .faq-answer {
            max-height: 240px;
        }

        .faq-item.active .faq-chevron {
            transform: rotate(180deg);
        }

        /* 响应式移动端菜单 */
        #mobileMenu {
            transition: opacity 0.3s ease, visibility 0.3s ease;
        }