/* roulang page: index */
:root {
      --bg-canvas: #F8F9FA;
      --bg-card: #FFFFFF;
      --bg-alt: #F0F2F5;
      --primary-crimson: #8B1E28;
      --primary-hover: #71171F;
      --accent-gold: #B38E5D;
      --text-main: #1A1D20;
      --text-muted: #555E68;
      --border-light: #DEE2E6;
      --border-subtle: #E9ECEF;
      --radius-sm: 4px;
      --radius-md: 6px;
      --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
      --shadow-hover: 0 6px 16px rgba(0, 0, 0, 0.08);
      --transition-base: all 0.25s ease-in-out;
    }

    body {
      background-color: var(--bg-canvas);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.8;
      -webkit-font-smoothing: antialiased;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: var(--transition-base);
    }
    a:hover {
      color: var(--primary-crimson);
    }

    /* 顶部导航 */
    .site-header {
      background-color: #FFFFFF;
      border-bottom: 1px solid #E5E7EB;
      position: sticky;
      top: 0;
      z-index: 1020;
    }
    .navbar-brand-custom {
      font-size: 1.35rem;
      font-weight: 700;
      letter-spacing: -0.02em;
      color: var(--text-main);
      display: flex;
      align-items: center;
      gap: 0.5rem;
    }
    .brand-accent {
      color: var(--primary-crimson);
      border-left: 3px solid var(--primary-crimson);
      padding-left: 0.5rem;
      font-size: 0.85rem;
      font-weight: 600;
    }
    .nav-link-custom {
      font-weight: 500;
      font-size: 0.95rem;
      color: var(--text-muted);
      padding: 0.5rem 1rem !important;
      border-bottom: 2px solid transparent;
    }
    .nav-link-custom:hover,
    .nav-link-custom.active {
      color: var(--primary-crimson) !important;
      border-bottom-color: var(--primary-crimson);
    }

    /* 栏目样式与标题系统 */
    .section-editorial {
      padding-top: 4.5rem;
      padding-bottom: 4.5rem;
      border-bottom: 1px solid var(--border-light);
    }
    .section-title {
      font-size: 1.75rem;
      font-weight: 700;
      color: var(--text-main);
      position: relative;
      padding-left: 0.85rem;
      border-left: 4px solid var(--primary-crimson);
      line-height: 1.3;
      margin-bottom: 0.5rem;
    }
    .section-subtitle {
      font-size: 0.95rem;
      color: var(--text-muted);
      margin-bottom: 2.25rem;
      margin-left: 0.85rem;
    }

    /* 卡片体系 */
    .custom-card {
      background-color: var(--bg-card);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-sm);
      box-shadow: var(--shadow-sm);
      transition: var(--transition-base);
      height: 100%;
    }
    .custom-card:hover {
      box-shadow: var(--shadow-hover);
      border-color: #CBD5E1;
      transform: translateY(-2px);
    }
    .card-label {
      font-size: 0.75rem;
      font-weight: 600;
      text-transform: uppercase;
      color: var(--accent-gold);
      letter-spacing: 0.05em;
    }

    /* 工业参数首屏 */
    .hero-panel {
      background: linear-gradient(135deg, #FFFFFF 0%, #F1F4F8 100%);
      border-bottom: 1px solid var(--border-light);
      padding: 4.5rem 0 3.5rem;
    }
    .hero-h1 {
      font-size: 2.35rem;
      font-weight: 800;
      line-height: 1.25;
      color: var(--text-main);
      margin-bottom: 1.25rem;
    }
    .hero-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
      line-height: 1.85;
      margin-bottom: 2rem;
    }
    .spec-badge-group {
      display: flex;
      flex-wrap: wrap;
      gap: 0.75rem;
      margin-bottom: 1.5rem;
    }
    .spec-badge {
      background-color: #EAEFF5;
      color: #334155;
      padding: 0.35rem 0.75rem;
      font-size: 0.85rem;
      font-weight: 600;
      border-radius: var(--radius-sm);
      border-left: 2px solid var(--accent-gold);
    }
    .stats-card-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 1rem;
    }
    .stat-metric-box {
      background: #FFFFFF;
      border: 1px solid var(--border-subtle);
      padding: 1.25rem;
      border-radius: var(--radius-sm);
      border-top: 3px solid var(--primary-crimson);
    }
    .stat-num {
      font-size: 2rem;
      font-weight: 800;
      color: var(--primary-crimson);
      line-height: 1;
      margin-bottom: 0.35rem;
    }
    .stat-title {
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 0.25rem;
    }
    .stat-detail {
      font-size: 0.78rem;
      color: var(--text-muted);
      line-height: 1.4;
    }

    /* 按钮定制 */
    .btn-crimson {
      background-color: var(--primary-crimson);
      color: #FFFFFF !important;
      border-radius: var(--radius-sm);
      padding: 0.65rem 1.65rem;
      font-weight: 600;
      font-size: 0.95rem;
      border: 1px solid var(--primary-crimson);
      display: inline-block;
      transition: var(--transition-base);
    }
    .btn-crimson:hover {
      background-color: var(--primary-hover);
      border-color: var(--primary-hover);
      box-shadow: 0 4px 10px rgba(139, 30, 40, 0.25);
    }
    .btn-outline-crimson {
      background-color: transparent;
      color: var(--primary-crimson) !important;
      border: 1px solid var(--primary-crimson);
      border-radius: var(--radius-sm);
      padding: 0.65rem 1.4rem;
      font-weight: 600;
      font-size: 0.95rem;
      transition: var(--transition-base);
    }
    .btn-outline-crimson:hover {
      background-color: #FDF2F3;
      color: var(--primary-hover) !important;
    }

    /* 表格定制 */
    .table-editorial {
      background: #FFFFFF;
      border-collapse: collapse;
      width: 100%;
      border: 1px solid var(--border-light);
    }
    .table-editorial th {
      background-color: #F1F4F8;
      color: var(--text-main);
      font-weight: 700;
      font-size: 0.9rem;
      padding: 1rem 1.25rem;
      border-bottom: 2px solid var(--border-light);
    }
    .table-editorial td {
      padding: 1rem 1.25rem;
      border-bottom: 1px solid var(--border-subtle);
      font-size: 0.9rem;
      color: var(--text-main);
    }
    .table-editorial tr:hover td {
      background-color: #F8FAFC;
    }

    /* 时间轴 */
    .timeline-stream {
      position: relative;
      padding-left: 2rem;
      border-left: 2px solid var(--border-light);
    }
    .timeline-node {
      position: relative;
      margin-bottom: 2rem;
    }
    .timeline-node:last-child {
      margin-bottom: 0;
    }
    .timeline-dot {
      position: absolute;
      left: -2.45rem;
      top: 0.3rem;
      width: 14px;
      height: 14px;
      border-radius: 50%;
      background: var(--primary-crimson);
      border: 3px solid #FFFFFF;
      box-shadow: 0 0 0 2px var(--border-light);
    }
    .timeline-date {
      font-size: 0.85rem;
      font-weight: 700;
      color: var(--accent-gold);
      margin-bottom: 0.25rem;
    }
    .timeline-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 0.5rem;
    }

    /* 流程图示 */
    .process-step-box {
      border: 1px solid var(--border-subtle);
      background: #FFFFFF;
      padding: 1.5rem;
      border-radius: var(--radius-sm);
      position: relative;
    }
    .process-index {
      font-size: 1.75rem;
      font-weight: 800;
      color: var(--accent-gold);
      line-height: 1;
      margin-bottom: 0.75rem;
    }

    /* FAQ 折叠板 */
    .accordion-button:not(.collapsed) {
      background-color: #FDF2F3;
      color: var(--primary-crimson);
      box-shadow: none;
    }
    .accordion-button:focus {
      border-color: var(--primary-crimson);
      box-shadow: none;
    }
    .accordion-item {
      border: 1px solid var(--border-subtle);
      margin-bottom: 0.75rem;
      border-radius: var(--radius-sm) !important;
    }

    /* 页脚 */
    .site-footer {
      background-color: #1A1D20;
      color: #94A3B8;
      font-size: 0.88rem;
      padding-top: 3.5rem;
      padding-bottom: 2.5rem;
      border-top: 3px solid var(--primary-crimson);
    }
    .site-footer a {
      color: #CBD5E1;
    }
    .site-footer a:hover {
      color: #FFFFFF;
    }
    .footer-title {
      color: #FFFFFF;
      font-size: 1.05rem;
      font-weight: 700;
      margin-bottom: 1.25rem;
      border-left: 3px solid var(--primary-crimson);
      padding-left: 0.6rem;
    }

    @media (max-width: 991.98px) {
      .hero-h1 {
        font-size: 1.9rem;
      }
      .section-editorial {
        padding-top: 3.5rem;
        padding-bottom: 3.5rem;
      }
      .stats-card-grid {
        grid-template-columns: 1fr;
        margin-top: 2rem;
      }
    }

/* roulang page: category1 */
:root {
      --bg-canvas: #F8F9FA;
      --bg-card: #FFFFFF;
      --bg-alt: #F0F2F5;
      --primary-crimson: #8B1E28;
      --primary-hover: #71171F;
      --accent-gold: #B38E5D;
      --text-main: #1A1D20;
      --text-muted: #555E68;
      --border-light: #DEE2E6;
      --border-subtle: #E9ECEF;
      --radius-sm: 4px;
      --radius-md: 6px;
      --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
      --shadow-hover: 0 6px 16px rgba(0, 0, 0, 0.08);
      --transition-base: all 0.25s ease-in-out;
    }
    body {
      background-color: var(--bg-canvas);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.8;
      -webkit-font-smoothing: antialiased;
    }
    a {
      color: inherit;
      text-decoration: none;
      transition: var(--transition-base);
    }
    a:hover {
      color: var(--primary-crimson);
    }
    .site-header {
      background-color: #FFFFFF;
      border-bottom: 1px solid #E5E7EB;
      position: sticky;
      top: 0;
      z-index: 1020;
    }
    .navbar-brand-custom {
      font-size: 1.35rem;
      font-weight: 700;
      letter-spacing: -0.02em;
      color: var(--text-main);
      display: flex;
      align-items: center;
      gap: 0.5rem;
    }
    .brand-accent {
      color: var(--primary-crimson);
      border-left: 3px solid var(--primary-crimson);
      padding-left: 0.5rem;
      font-size: 0.85rem;
      font-weight: 600;
    }
    .nav-link-custom {
      font-weight: 500;
      font-size: 0.95rem;
      color: var(--text-muted);
      padding: 0.5rem 1rem !important;
      border-bottom: 2px solid transparent;
    }
    .nav-link-custom:hover,
    .nav-link-custom.active {
      color: var(--primary-crimson) !important;
      border-bottom-color: var(--primary-crimson);
    }
    .breadcrumb-nav-strip {
      background-color: #EEF2F6;
      border-bottom: 1px solid var(--border-light);
      padding: 0.75rem 0;
      font-size: 0.88rem;
    }
    .breadcrumb-custom {
      margin-bottom: 0;
    }
    .breadcrumb-custom .breadcrumb-item + .breadcrumb-item::before {
      content: "›";
      color: #94A3B8;
    }
    .back-btn-anchor {
      display: inline-flex;
      align-items: center;
      gap: 0.35rem;
      color: var(--text-muted);
      font-size: 0.85rem;
      padding: 0.2rem 0.65rem;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-sm);
      background: #FFFFFF;
    }
    .back-btn-anchor:hover {
      color: var(--primary-crimson);
      border-color: var(--primary-crimson);
    }
    .section-editorial {
      padding-top: 4rem;
      padding-bottom: 4rem;
      border-bottom: 1px solid var(--border-light);
    }
    .section-editorial:nth-of-type(even) {
      background-color: var(--bg-alt);
    }
    .section-title {
      font-size: 1.75rem;
      font-weight: 700;
      color: var(--text-main);
      position: relative;
      padding-left: 0.85rem;
      border-left: 4px solid var(--primary-crimson);
      line-height: 1.3;
      margin-bottom: 0.5rem;
    }
    .section-subtitle {
      font-size: 0.95rem;
      color: var(--text-muted);
      margin-bottom: 2rem;
      margin-left: 0.85rem;
    }
    .custom-card {
      background-color: var(--bg-card);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-sm);
      box-shadow: var(--shadow-sm);
      transition: var(--transition-base);
      height: 100%;
      display: flex;
      flex-direction: column;
    }
    .custom-card:hover {
      box-shadow: var(--shadow-hover);
      border-color: #CBD5E1;
      transform: translateY(-2px);
    }
    .card-label {
      font-size: 0.75rem;
      font-weight: 600;
      text-transform: uppercase;
      color: var(--accent-gold);
      letter-spacing: 0.05em;
    }
    .btn-crimson {
      background-color: var(--primary-crimson);
      color: #FFFFFF !important;
      border-radius: var(--radius-sm);
      padding: 0.65rem 1.65rem;
      font-weight: 600;
      font-size: 0.95rem;
      border: 1px solid var(--primary-crimson);
      display: inline-block;
      transition: var(--transition-base);
    }
    .btn-crimson:hover {
      background-color: var(--primary-hover);
      border-color: var(--primary-hover);
      box-shadow: 0 4px 10px rgba(139, 30, 40, 0.25);
    }
    .btn-outline-crimson {
      background-color: transparent;
      color: var(--primary-crimson) !important;
      border: 1px solid var(--primary-crimson);
      border-radius: var(--radius-sm);
      padding: 0.65rem 1.4rem;
      font-weight: 600;
      font-size: 0.95rem;
      transition: var(--transition-base);
    }
    .btn-outline-crimson:hover {
      background-color: #FDF2F3;
      color: var(--primary-hover) !important;
    }
    .category-banner {
      background: #FFFFFF;
      border-bottom: 1px solid var(--border-light);
      padding: 3rem 0;
    }
    .category-h1 {
      font-size: 2.15rem;
      font-weight: 800;
      line-height: 1.3;
      color: var(--text-main);
      margin-bottom: 0.75rem;
    }
    .filter-bar-wrap {
      background: #FFFFFF;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-sm);
      padding: 1.25rem 1.5rem;
      box-shadow: var(--shadow-sm);
      margin-bottom: 2.5rem;
    }
    .filter-group-title {
      font-size: 0.88rem;
      font-weight: 700;
      color: var(--text-main);
      min-width: 80px;
    }
    .filter-tag {
      font-size: 0.85rem;
      color: var(--text-muted);
      padding: 0.25rem 0.75rem;
      border-radius: var(--radius-sm);
      cursor: pointer;
      transition: var(--transition-base);
    }
    .filter-tag:hover,
    .filter-tag.active {
      background-color: var(--primary-crimson);
      color: #FFFFFF;
    }
    .rank-badge {
      width: 2rem;
      height: 2rem;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 0.95rem;
      border-radius: 50%;
      background: #E2E8F0;
      color: #334155;
    }
    .rank-badge-top {
      background: var(--primary-crimson);
      color: #FFFFFF;
    }
    .rank-badge-gold {
      background: var(--accent-gold);
      color: #FFFFFF;
    }
    .card-img-wrap {
      position: relative;
      overflow: hidden;
      aspect-ratio: 16 / 9;
      background: #000000;
    }
    .card-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .custom-card:hover .card-img-wrap img {
      transform: scale(1.04);
    }
    .stream-tag {
      position: absolute;
      top: 0.65rem;
      left: 0.65rem;
      background: rgba(26, 29, 32, 0.85);
      color: #FFFFFF;
      font-size: 0.75rem;
      font-weight: 600;
      padding: 0.2rem 0.5rem;
      border-radius: 2px;
      backdrop-filter: blur(4px);
    }
    .pagination-custom .page-link {
      color: var(--text-main);
      border-color: var(--border-light);
      padding: 0.5rem 0.9rem;
      font-size: 0.9rem;
    }
    .pagination-custom .page-item.active .page-link {
      background-color: var(--primary-crimson);
      border-color: var(--primary-crimson);
      color: #FFFFFF;
    }
    .site-footer {
      background-color: #1A1D20;
      color: #94A3B8;
      font-size: 0.88rem;
      padding-top: 3.5rem;
      padding-bottom: 2.5rem;
      border-top: 3px solid var(--primary-crimson);
    }
    .site-footer a {
      color: #CBD5E1;
    }
    .site-footer a:hover {
      color: #FFFFFF;
    }
    .footer-title {
      color: #FFFFFF;
      font-size: 1.05rem;
      font-weight: 700;
      margin-bottom: 1.25rem;
      border-left: 3px solid var(--primary-crimson);
      padding-left: 0.6rem;
    }
    @media (max-width: 991.98px) {
      .category-h1 {
        font-size: 1.8rem;
      }
      .section-editorial {
        padding-top: 3rem;
        padding-bottom: 3rem;
      }
    }

/* roulang: framework shim */
/* 覆盖 Bootstrap 等对 a/btn 的全局默认，避免导航出现下划线/蓝链 */
.site-header a,.site-header a:hover,.navbar a,.navbar a:hover,.nav-links a,.nav-links a:hover,header nav a,header nav a:hover{text-decoration:none}
.site-header .btn,.navbar .btn,.nav-cta{text-decoration:none}