/* roulang page: index */
:root {
            --color-primary: #11322B;
            --color-primary-dark: #0E1F1C;
            --color-primary-deep: #091412;
            --color-accent-gold: #C5A880;
            --color-accent-copper: #D97706;
            --color-bg-light: #F8F9FA;
            --color-bg-muted: #F3F4F6;
            --color-text-main: #0F172A;
            --color-text-body: #334155;
            --color-text-muted: #64748B;
            --border-subtle: 1px solid rgba(15, 23, 42, 0.08);
            --border-gold: 1px solid rgba(197, 168, 128, 0.35);
            --radius-base: 0.625rem;
            --radius-lg: 0.875rem;
            --shadow-card: 0 4px 20px -2px rgba(0, 0, 0, 0.05);
            --shadow-hover: 0 14px 28px -4px rgba(17, 50, 43, 0.12);
        }

        *, *::before, *::after {
            box-sizing: border-box;
        }

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

        h1, h2, h3, h4, .heading-tight {
            color: var(--color-text-main);
            letter-spacing: -0.02em;
            line-height: 1.25;
        }

        p {
            margin-bottom: 1.15rem;
        }

        .container-custom {
            width: 100%;
            max-width: 1280px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1.25rem;
            padding-right: 1.25rem;
        }

        @media (min-width: 1024px) {
            .container-custom {
                padding-left: 2rem;
                padding-right: 2rem;
            }
        }

        /* 导航与交互组件状态 */
        .nav-link {
            position: relative;
            font-weight: 500;
            color: #1E293B;
            transition: color 0.25s ease;
            padding: 0.5rem 0.25rem;
        }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--color-primary);
            transition: width 0.25s ease;
        }
        .nav-link:hover, .nav-link.active {
            color: var(--color-primary);
        }
        .nav-link:hover::after, .nav-link.active::after {
            width: 100%;
        }

        /* 卡片与微交互 */
        .b2b-card {
            background: #FFFFFF;
            border: var(--border-subtle);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            transition: transform 0.28s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.28s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.28s ease;
        }
        .b2b-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(197, 168, 128, 0.55);
        }

        .matrix-card {
            background: #FFFFFF;
            border: var(--border-subtle);
            border-radius: var(--radius-lg);
            transition: all 0.3s ease;
        }
        .matrix-card:hover {
            background: #11322B;
            color: #F8FAFC;
            transform: translateY(-5px);
            box-shadow: 0 16px 32px -6px rgba(17, 50, 43, 0.25);
        }
        .matrix-card:hover h3,
        .matrix-card:hover p,
        .matrix-card:hover .matrix-meta {
            color: #F8FAFC !important;
        }
        .matrix-card:hover .matrix-badge {
            background-color: var(--color-accent-gold);
            color: #091412;
        }

        /* 按钮体系 */
        .btn-primary-brand {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-height: 48px;
            padding: 0.75rem 1.75rem;
            background-color: var(--color-accent-copper);
            color: #FFFFFF;
            font-weight: 600;
            border-radius: 0.5rem;
            transition: all 0.25s ease;
            box-shadow: 0 4px 14px rgba(217, 119, 6, 0.25);
        }
        .btn-primary-brand:hover {
            background-color: #B45309;
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(217, 119, 6, 0.35);
        }
        .btn-primary-brand:focus-visible {
            outline: 3px solid rgba(217, 119, 6, 0.4);
            outline-offset: 2px;
        }

        .btn-outline-gold {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-height: 48px;
            padding: 0.75rem 1.75rem;
            background-color: rgba(255, 255, 255, 0.06);
            color: #F8FAFC;
            border: 1px solid rgba(197, 168, 128, 0.6);
            font-weight: 600;
            border-radius: 0.5rem;
            transition: all 0.25s ease;
        }
        .btn-outline-gold:hover {
            background-color: var(--color-accent-gold);
            color: #091412;
            border-color: var(--color-accent-gold);
        }

        /* 装饰渐变边框 */
        .gradient-frame {
            position: relative;
            padding: 4px;
            border-radius: 0.875rem;
            background: linear-gradient(135deg, #C5A880 0%, #11322B 50%, #D97706 100%);
        }

        /* 手风琴平滑样式 */
        details.faq-item {
            border: var(--border-subtle);
            border-radius: 0.625rem;
            background: #FFFFFF;
            transition: all 0.25s ease;
        }
        details.faq-item[open] {
            border-color: var(--color-primary);
            box-shadow: 0 6px 20px -4px rgba(17, 50, 43, 0.08);
        }
        details.faq-item summary {
            list-style: none;
            cursor: pointer;
        }
        details.faq-item summary::-webkit-details-marker {
            display: none;
        }

        /* 表单高亮控制 */
        .form-field-wrap:focus-within {
            border-color: var(--color-primary);
            box-shadow: 0 0 0 3px rgba(17, 50, 43, 0.12);
        }

        /* 横向时间轴美化 */
        .timeline-scroll::-webkit-scrollbar {
            height: 6px;
        }
        .timeline-scroll::-webkit-scrollbar-track {
            background: #E2E8F0;
            border-radius: 9999px;
        }
        .timeline-scroll::-webkit-scrollbar-thumb {
            background: #11322B;
            border-radius: 9999px;
        }

        @media (max-width: 640px) {
            .hero-bento-title {
                font-size: 1.875rem !important;
                line-height: 1.25 !important;
            }
        }