/* roulang page: index */
:root {
      --primary: #d9480f;
      --primary-hover: #c92a2a;
      --primary-light: #fff4e6;
      --secondary: #2b8a3e;
      --dark: #1f2937;
      --dark-card: #111827;
      --text: #374151;
      --text-muted: #6b7280;
      --bg: #fdfdfd;
      --bg-alt: #f8fafc;
      --border: #e5e7eb;
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 20px;
      --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
      --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
      --shadow-lg: 0 12px 30px rgba(0,0,0,0.12);
      --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }
    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    body {
      font-family: var(--font);
      background-color: var(--bg);
      color: var(--text);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }
    a { color: inherit; text-decoration: none; transition: all 0.25s ease; }
    img { max-width: 100%; height: auto; display: block; }
    button, input, select { font-family: inherit; }

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }

    /* 顶部导航 */
    header.site-header {
      background: #ffffff;
      border-bottom: 1px solid var(--border);
      position: sticky;
      top: 0;
      z-index: 100;
      box-shadow: var(--shadow-sm);
    }
    .nav-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 70px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 1.5rem;
      font-weight: 800;
      color: var(--primary);
      letter-spacing: -0.5px;
    }
    .brand-logo span.tag {
      font-size: 0.75rem;
      background: var(--primary-light);
      color: var(--primary);
      padding: 3px 8px;
      border-radius: 99px;
      font-weight: 600;
    }
    .nav-links {
      display: flex;
      gap: 28px;
      list-style: none;
      align-items: center;
    }
    .nav-links a {
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--dark);
    }
    .nav-links a:hover, .nav-links a.active {
      color: var(--primary);
    }
    .nav-cta-btn {
      background: var(--primary);
      color: #fff !important;
      padding: 8px 18px;
      border-radius: var(--radius-sm);
      font-size: 0.9rem;
      font-weight: 600;
    }
    .nav-cta-btn:hover {
      background: var(--primary-hover);
      box-shadow: 0 4px 12px rgba(217, 72, 15, 0.25);
    }

    /* 板块通用 */
    section {
      padding: 64px 0;
      position: relative;
    }
    .section-alt {
      background-color: var(--bg-alt);
      border-top: 1px solid var(--border);
      border-bottom: 1px solid var(--border);
    }
    .section-head {
      margin-bottom: 40px;
    }
    .section-tag {
      display: inline-block;
      font-size: 0.85rem;
      font-weight: 700;
      text-transform: uppercase;
      color: var(--primary);
      background: var(--primary-light);
      padding: 4px 12px;
      border-radius: 99px;
      margin-bottom: 12px;
    }
    .section-title {
      font-size: 1.85rem;
      font-weight: 800;
      color: var(--dark);
      letter-spacing: -0.5px;
      line-height: 1.3;
    }
    .section-desc {
      font-size: 0.98rem;
      color: var(--text-muted);
      margin-top: 10px;
      max-width: 760px;
    }

    /* 1. 全宽浅色顶栏 + 矮横幅 Hero */
    .hero-strip {
      background: linear-gradient(135deg, #fff7ed 0%, #ffedd5 100%);
      padding: 50px 0 54px;
      border-bottom: 1px solid #fed7aa;
    }
    .hero-layout {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 36px;
      align-items: center;
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: #ea580c;
      color: #ffffff;
      font-size: 0.8rem;
      font-weight: 700;
      padding: 4px 12px;
      border-radius: 99px;
      margin-bottom: 16px;
    }
    .hero-title {
      font-size: 2.25rem;
      font-weight: 900;
      color: #9a3412;
      line-height: 1.25;
      margin-bottom: 14px;
    }
    .hero-intro {
      font-size: 1rem;
      color: #7c2d12;
      line-height: 1.65;
      margin-bottom: 24px;
    }
    .hero-actions {
      display: flex;
      gap: 14px;
      align-items: center;
      flex-wrap: wrap;
    }
    .btn-main {
      background: #c2410c;
      color: #fff;
      font-weight: 700;
      padding: 12px 26px;
      border-radius: var(--radius-sm);
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .btn-main:hover {
      background: #9a3412;
    }
    .btn-ghost {
      border: 1px solid #ea580c;
      color: #c2410c;
      font-weight: 600;
      padding: 11px 22px;
      border-radius: var(--radius-sm);
    }
    .btn-ghost:hover {
      background: #ffedd5;
    }
    .hero-media-wrap {
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-lg);
      border: 4px solid #fff;
      position: relative;
    }
    .hero-media-wrap img {
      width: 100%;
      height: 270px;
      object-fit: cover;
    }

    /* 2. 卖点三连 */
    .features-triplet {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .triplet-card {
      background: #fff;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 28px 24px;
      transition: transform 0.2s, box-shadow 0.2s;
    }
    .triplet-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: #fdba74;
    }
    .triplet-num {
      font-size: 1.8rem;
      font-weight: 900;
      color: var(--primary);
      margin-bottom: 12px;
    }
    .triplet-card h3 {
      font-size: 1.15rem;
      margin-bottom: 8px;
      color: var(--dark);
    }
    .triplet-card p {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 3. 入口矩阵 */
    .matrix-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .matrix-item {
      background: #fff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border);
      padding: 24px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      height: 100%;
    }
    .matrix-tag {
      font-size: 0.75rem;
      font-weight: 700;
      color: var(--secondary);
      background: #ebfbee;
      padding: 2px 8px;
      border-radius: 4px;
      display: inline-block;
      margin-bottom: 12px;
      align-self: flex-start;
    }
    .matrix-item h4 {
      font-size: 1.05rem;
      color: var(--dark);
      margin-bottom: 8px;
    }
    .matrix-item p {
      font-size: 0.88rem;
      color: var(--text-muted);
      margin-bottom: 16px;
      line-height: 1.5;
    }
    .matrix-link {
      color: var(--primary);
      font-size: 0.88rem;
      font-weight: 700;
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    /* 4. 最新发布 (带横版图片卡片) */
    .feed-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .feed-card {
      background: #fff;
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border);
      box-shadow: var(--shadow-sm);
    }
    .feed-thumb {
      height: 180px;
      overflow: hidden;
    }
    .feed-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.3s;
    }
    .feed-card:hover .feed-thumb img {
      transform: scale(1.05);
    }
    .feed-content {
      padding: 20px;
    }
    .feed-meta {
      font-size: 0.8rem;
      color: var(--text-muted);
      margin-bottom: 8px;
      display: flex;
      justify-content: space-between;
    }
    .feed-content h4 {
      font-size: 1.08rem;
      color: var(--dark);
      line-height: 1.4;
      margin-bottom: 10px;
    }
    .feed-content p {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.55;
    }

    /* 5. 热门专题 (章节化条带感) */
    .topic-list {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .topic-row {
      background: #fff;
      border: 1px solid var(--border);
      border-left: 5px solid var(--primary);
      border-radius: var(--radius-sm);
      padding: 20px 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
    }
    .topic-info h4 {
      font-size: 1.1rem;
      color: var(--dark);
      margin-bottom: 6px;
    }
    .topic-info p {
      font-size: 0.9rem;
      color: var(--text-muted);
    }
    .topic-badge-score {
      background: #fff7ed;
      color: var(--primary);
      border: 1px solid #fed7aa;
      font-weight: 800;
      padding: 6px 14px;
      border-radius: var(--radius-sm);
      white-space: nowrap;
      font-size: 0.9rem;
    }

    /* 6. 资讯列表 (紧凑列表) */
    .news-wrapper {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 30px;
    }
    .news-group {
      background: #fff;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 24px;
    }
    .news-group h3 {
      font-size: 1.2rem;
      margin-bottom: 16px;
      border-bottom: 2px solid var(--primary);
      padding-bottom: 8px;
      display: inline-block;
    }
    .news-item {
      padding: 12px 0;
      border-bottom: 1px dashed var(--border);
    }
    .news-item:last-child { border-bottom: none; }
    .news-item a {
      font-size: 0.95rem;
      color: var(--dark);
      font-weight: 600;
      display: block;
      margin-bottom: 4px;
    }
    .news-item a:hover { color: var(--primary); }
    .news-item span {
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    /* 7. 数据指标看板 */
    .metrics-bar {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      text-align: center;
    }
    .metric-box {
      background: #fff;
      padding: 30px 20px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border);
      box-shadow: var(--shadow-sm);
    }
    .metric-value {
      font-size: 2.2rem;
      font-weight: 900;
      color: var(--primary);
      margin-bottom: 6px;
      letter-spacing: -1px;
    }
    .metric-label {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--dark);
      margin-bottom: 4px;
    }
    .metric-sub {
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    /* 8. 真实业务口碑 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .review-bubble {
      background: #fff;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .review-text {
      font-size: 0.92rem;
      color: var(--text);
      line-height: 1.6;
      margin-bottom: 16px;
      font-style: italic;
    }
    .review-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #f1f5f9;
      padding-top: 12px;
    }
    .author-avatar {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: #fed7aa;
      color: #9a3412;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 0.9rem;
    }
    .author-name {
      font-size: 0.9rem;
      font-weight: 700;
      color: var(--dark);
    }
    .author-role {
      font-size: 0.78rem;
      color: var(--text-muted);
    }

    /* 9. 安全体系与平台保障 (扩充板块) */
    .guarantee-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }
    .guarantee-item {
      background: #fff;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 20px;
    }
    .guarantee-item h4 {
      font-size: 1rem;
      color: var(--dark);
      margin-bottom: 6px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .guarantee-item h4::before {
      content: "✓";
      display: inline-block;
      width: 20px;
      height: 20px;
      background: #dcfce7;
      color: #166534;
      border-radius: 50%;
      text-align: center;
      line-height: 20px;
      font-size: 0.75rem;
    }
    .guarantee-item p {
      font-size: 0.85rem;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 10. 适用场景矩阵 (扩充板块) */
    .scenario-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
    }
    .scenario-card {
      background: #fff;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 20px;
      border-top: 4px solid #f97316;
    }
    .scenario-card h4 {
      font-size: 1rem;
      color: var(--dark);
      margin-bottom: 8px;
    }
    .scenario-card p {
      font-size: 0.85rem;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 11. 联系入口 / 线索表单 */
    .lead-box {
      background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
      border-radius: var(--radius-lg);
      padding: 44px;
      color: #fff;
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 40px;
      align-items: center;
    }
    .lead-info h3 {
      font-size: 1.7rem;
      font-weight: 800;
      margin-bottom: 12px;
      color: #f8fafc;
    }
    .lead-info p {
      font-size: 0.95rem;
      color: #cbd5e1;
      line-height: 1.6;
      margin-bottom: 20px;
    }
    .lead-form {
      background: #ffffff;
      padding: 28px;
      border-radius: var(--radius-md);
      color: var(--text);
    }
    .form-group {
      margin-bottom: 16px;
    }
    .form-group label {
      display: block;
      font-size: 0.85rem;
      font-weight: 600;
      margin-bottom: 6px;
      color: var(--dark);
    }
    .form-input {
      width: 100%;
      padding: 10px 14px;
      border: 1px solid var(--border);
      border-radius: var(--radius-sm);
      font-size: 0.9rem;
      outline: none;
    }
    .form-input:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(217, 72, 15, 0.15);
    }
    .btn-submit {
      width: 100%;
      background: var(--primary);
      color: #fff;
      border: none;
      padding: 12px;
      font-weight: 700;
      border-radius: var(--radius-sm);
      cursor: pointer;
      font-size: 0.95rem;
      transition: background 0.2s;
    }
    .btn-submit:hover {
      background: var(--primary-hover);
    }
    .form-privacy {
      font-size: 0.75rem;
      color: var(--text-muted);
      text-align: center;
      margin-top: 10px;
    }

    /* 页脚 */
    footer.site-footer {
      background: #0b0f19;
      color: #94a3b8;
      padding: 50px 0 24px;
      font-size: 0.88rem;
      border-top: 1px solid #1e293b;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 30px;
      margin-bottom: 40px;
    }
    .footer-brand h4 {
      font-size: 1.3rem;
      font-weight: 800;
      color: #f1f5f9;
      margin-bottom: 12px;
    }
    .footer-brand p {
      line-height: 1.6;
      max-width: 320px;
      color: #64748b;
    }
    .footer-col h5 {
      font-size: 0.95rem;
      font-weight: 700;
      color: #cbd5e1;
      margin-bottom: 14px;
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }
    .footer-links a:hover {
      color: #f8fafc;
    }
    .footer-bottom {
      border-top: 1px solid #1e293b;
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
      color: #64748b;
      font-size: 0.82rem;
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .matrix-grid, .scenario-grid { grid-template-columns: repeat(2, 1fr); }
      .metrics-bar { grid-template-columns: repeat(2, 1fr); }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }
    @media (max-width: 768px) {
      .hero-layout { grid-template-columns: 1fr; }
      .features-triplet, .feed-grid, .reviews-grid, .guarantee-grid { grid-template-columns: 1fr; }
      .news-wrapper { grid-template-columns: 1fr; }
      .lead-box { grid-template-columns: 1fr; padding: 24px; }
      .hero-title { font-size: 1.8rem; }
      .section-title { font-size: 1.5rem; }
      .nav-links { display: none; }
    }
    @media (max-width: 520px) {
      .matrix-grid, .scenario-grid, .metrics-bar { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr; }
    }