/* roulang page: index */
:root {
      --primary: #0f1e3c;
      --primary-light: #1e3a5f;
      --primary-dark: #081226;
      --accent: #f97316;
      --accent-hover: #ea580c;
      --accent-soft: #fff7ed;
      --bg: #f6f8fb;
      --bg-white: #ffffff;
      --text: #1e293b;
      --text-muted: #64748b;
      --border: #e2e8f0;
      --radius: 16px;
      --radius-sm: 10px;
      --shadow: 0 4px 24px rgba(15, 30, 60, 0.08);
      --shadow-hover: 0 12px 36px rgba(15, 30, 60, 0.14);
      --transition: all 0.3s ease;
      --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: var(--font-family);
      background: var(--bg);
      color: var(--text);
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
    }

    img {
      max-width: 100%;
      display: block;
    }

    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition);
    }

    button {
      font-family: inherit;
      cursor: pointer;
      border: none;
      background: none;
    }

    input {
      font-family: inherit;
    }

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    .section {
      padding: 80px 0;
    }

    .section-head {
      text-align: center;
      max-width: 720px;
      margin: 0 auto 56px;
    }

    .section-head .eyebrow {
      display: inline-block;
      background: var(--accent-soft);
      color: var(--accent);
      font-size: 13px;
      font-weight: 600;
      letter-spacing: 2px;
      padding: 4px 16px;
      border-radius: 999px;
      margin-bottom: 16px;
    }

    .section-head h2 {
      font-size: 2.25rem;
      font-weight: 800;
      color: var(--primary);
      line-height: 1.3;
      margin-bottom: 14px;
    }

    .section-head p {
      color: var(--text-muted);
      font-size: 1.05rem;
    }

    /* Header */
    .site-header {
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border);
      position: sticky;
      top: 0;
      z-index: 100;
    }

    .header-inner {
      display: grid;
      grid-template-columns: 1fr auto 1fr;
      align-items: center;
      gap: 1.5rem;
      height: 76px;
    }

    .brand-logo {
      font-size: 1.625rem;
      font-weight: 800;
      color: var(--primary);
      letter-spacing: 0.5px;
      display: inline-flex;
      align-items: center;
      gap: 10px;
      position: relative;
      z-index: 2;
    }

    .brand-logo::before {
      content: "";
      width: 10px;
      height: 10px;
      border-radius: 50%;
      background: var(--accent);
      box-shadow: 0 0 0 4px rgba(249, 115, 22, 0.2);
    }

    .brand-logo:hover {
      color: var(--accent);
    }

    .nav-left,
    .nav-right {
      display: flex;
      align-items: center;
      gap: 2px;
    }

    .nav-right {
      justify-content: flex-end;
    }

    .nav-link {
      padding: 8px 18px;
      border-radius: 999px;
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text);
      transition: var(--transition);
    }

    .nav-link:hover {
      background: rgba(15, 30, 60, 0.06);
      color: var(--primary);
    }

    .nav-link.active {
      background: var(--primary);
      color: #fff;
      font-weight: 600;
    }

    .nav-link.active:hover {
      background: var(--primary-light);
    }

    .mobile-menu-toggle {
      display: none;
      width: 44px;
      height: 44px;
      border-radius: 10px;
      align-items: center;
      justify-content: center;
      font-size: 1.25rem;
      color: var(--primary);
      transition: var(--transition);
    }

    .mobile-menu-toggle:hover {
      background: rgba(15, 30, 60, 0.06);
    }

    .mobile-menu {
      display: none;
      background: #fff;
      border-top: 1px solid var(--border);
      padding: 16px 24px 24px;
      flex-direction: column;
      gap: 4px;
      box-shadow: 0 12px 24px rgba(15, 30, 60, 0.06);
    }

    .mobile-menu.open {
      display: flex;
    }

    .mobile-link {
      padding: 12px 16px;
      border-radius: 10px;
      font-size: 1rem;
      font-weight: 500;
      color: var(--text);
    }

    .mobile-link:hover {
      background: var(--accent-soft);
      color: var(--accent);
    }

    /* Buttons */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 12px 30px;
      border-radius: 999px;
      font-size: 0.975rem;
      font-weight: 600;
      transition: var(--transition);
      outline: none;
    }

    .btn:focus-visible {
      outline: 3px solid rgba(249, 115, 22, 0.4);
      outline-offset: 2px;
    }

    .btn-primary {
      background: var(--accent);
      color: #fff;
      box-shadow: 0 4px 16px rgba(249, 115, 22, 0.3);
    }

    .btn-primary:hover {
      background: var(--accent-hover);
      transform: translateY(-2px);
      box-shadow: 0 8px 24px rgba(249, 115, 22, 0.4);
    }

    .btn-outline {
      border: 2px solid rgba(255, 255, 255, 0.7);
      color: #fff;
      background: transparent;
    }

    .btn-outline:hover {
      background: rgba(255, 255, 255, 0.12);
      border-color: #fff;
      transform: translateY(-2px);
    }

    .btn-dark {
      background: var(--primary);
      color: #fff;
    }

    .btn-dark:hover {
      background: var(--primary-light);
      transform: translateY(-2px);
      box-shadow: var(--shadow-hover);
    }

    /* Hero */
    .hero-section {
      position: relative;
      min-height: 640px;
      display: flex;
      align-items: center;
      background-image: linear-gradient(to right, rgba(8, 18, 38, 0.92), rgba(15, 30, 60, 0.72)),
        url('/assets/images/backpic/back-1.png');
      background-size: cover;
      background-position: center;
      color: #fff;
      overflow: hidden;
    }

    .hero-content {
      max-width: 720px;
      padding: 80px 0;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(255, 255, 255, 0.12);
      border: 1px solid rgba(255, 255, 255, 0.2);
      backdrop-filter: blur(6px);
      padding: 6px 18px;
      border-radius: 999px;
      font-size: 0.85rem;
      font-weight: 500;
      margin-bottom: 24px;
      color: rgba(255, 255, 255, 0.9);
    }

    .hero-badge i {
      color: var(--accent);
    }

    .hero-title {
      font-size: 3rem;
      font-weight: 800;
      line-height: 1.2;
      margin-bottom: 20px;
      color: #fff;
    }

    .hero-title span {
      color: var(--accent);
    }

    .hero-desc {
      font-size: 1.15rem;
      color: rgba(255, 255, 255, 0.85);
      max-width: 560px;
      margin-bottom: 36px;
      line-height: 1.8;
    }

    .hero-btns {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }

    .hero-scroll {
      position: absolute;
      bottom: 30px;
      left: 50%;
      transform: translateX(-50%);
      color: rgba(255, 255, 255, 0.6);
      font-size: 1.5rem;
      animation: bounce 2s infinite;
    }

    @keyframes bounce {
      0%,
      100% {
        transform: translateX(-50%) translateY(0);
      }
      50% {
        transform: translateX(-50%) translateY(10px);
      }
    }

    /* Stats */
    .stats-section {
      background: var(--primary);
      padding: 56px 0;
      border-radius: 0;
      position: relative;
    }

    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 40px;
      text-align: center;
    }

    .stat-item {
      padding: 16px;
      border-radius: var(--radius);
      transition: var(--transition);
    }

    .stat-item:hover {
      background: rgba(255, 255, 255, 0.04);
    }

    .stat-number {
      font-size: 2.75rem;
      font-weight: 800;
      color: #fff;
      line-height: 1.2;
      display: flex;
      align-items: baseline;
      justify-content: center;
      gap: 4px;
    }

    .stat-number em {
      font-style: normal;
      color: var(--accent);
      font-size: 1.5rem;
    }

    .stat-label {
      color: rgba(255, 255, 255, 0.65);
      font-size: 0.925rem;
      margin-top: 6px;
      letter-spacing: 1px;
    }

    /* Intro */
    .intro-section {
      background: var(--bg-white);
    }

    .intro-grid {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 60px;
      align-items: center;
    }

    .intro-content .eyebrow {
      display: inline-block;
      background: var(--accent-soft);
      color: var(--accent);
      font-size: 13px;
      font-weight: 600;
      padding: 4px 16px;
      border-radius: 999px;
      margin-bottom: 16px;
      letter-spacing: 1px;
    }

    .intro-content h2 {
      font-size: 2.125rem;
      font-weight: 800;
      color: var(--primary);
      line-height: 1.35;
      margin-bottom: 20px;
    }

    .intro-content p {
      color: var(--text-muted);
      font-size: 1.05rem;
      margin-bottom: 28px;
    }

    .intro-points {
      display: flex;
      flex-direction: column;
      gap: 16px;
      margin-bottom: 36px;
    }

    .intro-point {
      display: flex;
      align-items: flex-start;
      gap: 14px;
    }

    .intro-point-icon {
      width: 40px;
      height: 40px;
      flex-shrink: 0;
      border-radius: 10px;
      background: var(--accent-soft);
      color: var(--accent);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1rem;
    }

    .intro-point-title {
      font-weight: 600;
      color: var(--primary);
      font-size: 1rem;
      margin-bottom: 4px;
    }

    .intro-point-desc {
      color: var(--text-muted);
      font-size: 0.9rem;
      line-height: 1.6;
    }

    .intro-image-wrap {
      position: relative;
    }

    .intro-image-wrap::before {
      content: "";
      position: absolute;
      top: -20px;
      right: -20px;
      width: 180px;
      height: 180px;
      border-radius: 50%;
      background: var(--accent-soft);
      z-index: 0;
    }

    .intro-image {
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--shadow-hover);
      position: relative;
      z-index: 1;
    }

    .intro-image img {
      width: 100%;
      height: 380px;
      object-fit: cover;
    }

    /* Category Cards */
    .categories-section {
      background: var(--bg);
    }

    .categories-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .category-card {
      background: var(--bg-white);
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--shadow);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      border: 1px solid var(--border);
    }

    .category-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
      border-color: transparent;
    }

    .category-card-image {
      height: 190px;
      overflow: hidden;
      position: relative;
    }

    .category-card-image img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.5s ease;
    }

    .category-card:hover .category-card-image img {
      transform: scale(1.06);
    }

    .category-card-image::after {
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(to top, rgba(8, 18, 38, 0.4), transparent);
    }

    .category-card-body {
      padding: 28px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }

    .category-tag {
      display: inline-block;
      background: var(--accent-soft);
      color: var(--accent);
      font-size: 12px;
      font-weight: 600;
      padding: 3px 12px;
      border-radius: 999px;
      align-self: flex-start;
      margin-bottom: 14px;
      letter-spacing: 1px;
    }

    .category-card h3 {
      font-size: 1.325rem;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 10px;
    }

    .category-card p {
      color: var(--text-muted);
      font-size: 0.94rem;
      line-height: 1.7;
      margin-bottom: 20px;
      flex: 1;
    }

    .category-link {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      color: var(--accent);
      font-weight: 600;
      font-size: 0.925rem;
    }

    .category-link i {
      transition: transform 0.3s ease;
    }

    .category-link:hover {
      color: var(--accent-hover);
    }

    .category-link:hover i {
      transform: translateX(4px);
    }

    /* News List */
    .news-section {
      background: var(--bg-white);
    }

    .news-list {
      display: flex;
      flex-direction: column;
      gap: 16px;
      max-width: 960px;
      margin: 0 auto;
    }

    .news-item {
      display: flex;
      align-items: center;
      gap: 20px;
      padding: 20px 24px;
      background: var(--bg);
      border-radius: var(--radius);
      border: 1px solid transparent;
      transition: var(--transition);
    }

    .news-item:hover {
      background: var(--accent-soft);
      border-color: rgba(249, 115, 22, 0.2);
      transform: translateX(4px);
    }

    .news-item-date {
      flex-shrink: 0;
      width: 70px;
      height: 70px;
      border-radius: 14px;
      background: var(--primary);
      color: #fff;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      line-height: 1.2;
      transition: var(--transition);
    }

    .news-item:hover .news-item-date {
      background: var(--accent);
    }

    .news-item-date .day {
      font-size: 1.75rem;
      font-weight: 800;
    }

    .news-item-date .month {
      font-size: 0.75rem;
      color: rgba(255, 255, 255, 0.75);
    }

    .news-item-main {
      flex: 1;
      min-width: 0;
    }

    .news-item-tags {
      display: flex;
      gap: 8px;
      margin-bottom: 6px;
    }

    .news-tag {
      display: inline-block;
      font-size: 12px;
      font-weight: 600;
      background: rgba(29, 78, 216, 0.1);
      color: #1d4ed8;
      padding: 2px 10px;
      border-radius: 999px;
    }

    .news-item h3 {
      font-size: 1.1rem;
      font-weight: 600;
      color: var(--primary);
      margin-bottom: 6px;
      overflow: hidden;
      text-overflow: ellipsis;
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
    }

    .news-item p {
      font-size: 0.885rem;
      color: var(--text-muted);
      overflow: hidden;
      text-overflow: ellipsis;
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
      margin: 0;
    }

    .news-item-arrow {
      flex-shrink: 0;
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: rgba(15, 30, 60, 0.06);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      transition: var(--transition);
    }

    .news-item:hover .news-item-arrow {
      background: var(--accent);
      color: #fff;
    }

    .news-empty {
      text-align: center;
      padding: 48px;
      background: var(--bg);
      border-radius: var(--radius);
      color: var(--text-muted);
      font-size: 1rem;
    }

    /* Features */
    .features-section {
      background: var(--bg);
    }

    .features-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }

    .feature-card {
      background: var(--bg-white);
      border-radius: var(--radius);
      padding: 36px 28px;
      text-align: center;
      box-shadow: var(--shadow);
      transition: var(--transition);
      border: 1px solid var(--border);
    }

    .feature-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
    }

    .feature-icon {
      width: 68px;
      height: 68px;
      border-radius: 20px;
      background: linear-gradient(135deg, var(--primary), var(--primary-light));
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.6rem;
      margin: 0 auto 20px;
      transition: var(--transition);
    }

    .feature-card:hover .feature-icon {
      background: linear-gradient(135deg, var(--accent), var(--accent-hover));
      transform: rotate(6deg) scale(1.05);
    }

    .feature-card h3 {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 10px;
    }

    .feature-card p {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* Process */
    .process-section {
      background: var(--primary);
      color: #fff;
    }

    .process-section .section-head h2 {
      color: #fff;
    }

    .process-section .section-head p {
      color: rgba(255, 255, 255, 0.7);
    }

    .process-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 32px;
    }

    .process-step {
      text-align: center;
      position: relative;
      padding: 20px 12px;
    }

    .process-step::after {
      content: "";
      position: absolute;
      top: 44px;
      right: -16px;
      width: 32px;
      height: 2px;
      background: rgba(255, 255, 255, 0.2);
    }

    .process-step:last-child::after {
      display: none;
    }

    .process-number {
      width: 72px;
      height: 72px;
      margin: 0 auto 20px;
      border-radius: 50%;
      background: rgba(255, 255, 255, 0.1);
      border: 2px solid rgba(255, 255, 255, 0.25);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.75rem;
      font-weight: 800;
      color: var(--accent);
      transition: var(--transition);
    }

    .process-step:hover .process-number {
      background: var(--accent);
      color: #fff;
      border-color: var(--accent);
    }

    .process-step h3 {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 10px;
    }

    .process-step p {
      font-size: 0.875rem;
      color: rgba(255, 255, 255, 0.7);
      line-height: 1.7;
    }

    /* FAQ */
    .faq-section {
      background: var(--bg-white);
    }

    .faq-list {
      max-width: 800px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .faq-item {
      background: var(--bg);
      border-radius: var(--radius);
      border: 1px solid var(--border);
      overflow: hidden;
      transition: var(--transition);
    }

    .faq-item:hover {
      border-color: rgba(249, 115, 22, 0.3);
    }

    .faq-item[open] {
      border-color: rgba(249, 115, 22, 0.5);
      box-shadow: var(--shadow);
    }

    .faq-item summary {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      padding: 22px 28px;
      font-size: 1.05rem;
      font-weight: 600;
      color: var(--primary);
      cursor: pointer;
      list-style: none;
      outline: none;
    }

    .faq-item summary::-webkit-details-marker {
      display: none;
    }

    .faq-item summary::before {
      content: "";
      flex-shrink: 0;
      width: 4px;
      height: 24px;
      border-radius: 4px;
      background: var(--accent);
      margin-right: 4px;
    }

    .faq-item summary::after {
      content: "+";
      flex-shrink: 0;
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: rgba(15, 30, 60, 0.06);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.25rem;
      font-weight: 600;
      color: var(--primary);
      transition: var(--transition);
    }

    .faq-item[open] summary::after {
      content: "−";
      background: var(--accent);
      color: #fff;
    }

    .faq-item summary:hover::after {
      background: var(--accent);
      color: #fff;
    }

    .faq-answer {
      padding: 0 28px 24px 56px;
      color: var(--text-muted);
      font-size: 0.95rem;
      line-height: 1.8;
    }

    /* CTA */
    .cta-section {
      position: relative;
      background-image: linear-gradient(to right, rgba(8, 18, 38, 0.9), rgba(15, 30, 60, 0.8)),
        url('/assets/images/backpic/back-2.png');
      background-size: cover;
      background-position: center;
      padding: 100px 0;
      text-align: center;
      color: #fff;
    }

    .cta-section h2 {
      font-size: 2.5rem;
      font-weight: 800;
      margin-bottom: 18px;
    }

    .cta-section p {
      font-size: 1.125rem;
      color: rgba(255, 255, 255, 0.8);
      max-width: 560px;
      margin: 0 auto 36px;
    }

    /* Footer */
    .site-footer {
      background: var(--primary-dark);
      color: rgba(255, 255, 255, 0.7);
      padding-top: 64px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1fr 1fr 1.2fr;
      gap: 48px;
      padding-bottom: 48px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }

    .footer-brand .brand-logo {
      color: #fff;
      margin-bottom: 16px;
    }

    .footer-brand .brand-logo::before {
      background: var(--accent);
      box-shadow: 0 0 0 4px rgba(249, 115, 22, 0.2);
    }

    .footer-brand p {
      font-size: 0.9rem;
      line-height: 1.8;
      margin-top: 16px;
    }

    .footer-col h3 {
      color: #fff;
      font-size: 1rem;
      font-weight: 700;
      margin-bottom: 20px;
      position: relative;
      padding-bottom: 10px;
    }

    .footer-col h3::after {
      content: "";
      position: absolute;
      bottom: 0;
      left: 0;
      width: 28px;
      height: 3px;
      border-radius: 4px;
      background: var(--accent);
    }

    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .footer-links a {
      color: rgba(255, 255, 255, 0.65);
      font-size: 0.925rem;
      transition: var(--transition);
    }

    .footer-links a:hover {
      color: var(--accent);
      margin-left: 4px;
    }

    .footer-contact {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
      font-size: 0.9rem;
    }

    .footer-contact li {
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .footer-contact i {
      width: 20px;
      color: var(--accent);
      text-align: center;
    }

    .footer-bottom {
      padding: 28px 0;
      text-align: center;
      font-size: 0.85rem;
      color: rgba(255, 255, 255, 0.4);
    }

    /* Responsive */
    @media (max-width: 1024px) {
      .section {
        padding: 64px 0;
      }

      .features-grid {
        grid-template-columns: repeat(2, 1fr);
      }

      .process-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
      }

      .process-step::after {
        display: none;
      }

      .stats-grid {
        gap: 16px;
      }

      .stat-number {
        font-size: 2.25rem;
      }
    }

    @media (max-width: 768px) {
      .nav-left,
      .nav-right {
        display: none;
      }

      .mobile-menu-toggle {
        display: flex;
      }

      .header-inner {
        grid-template-columns: auto 1fr auto;
        height: 68px;
      }

      .brand-logo {
        font-size: 1.35rem;
        margin-left: auto;
        /* 居中 */
        position: absolute;
        left: 50%;
        transform: translateX(-50%);
      }

      .mobile-menu-toggle {
        margin-left: auto;
      }

      .hero-title {
        font-size: 2.125rem;
      }

      .hero-desc {
        font-size: 1rem;
      }

      .hero-section {
        min-height: 520px;
      }

      .stats-grid {
        grid-template-columns: repeat(2, 1fr);
      }

      .intro-grid {
        grid-template-columns: 1fr;
        gap: 40px;
      }

      .intro-image img {
        height: 260px;
      }

      .categories-grid {
        grid-template-columns: 1fr;
      }

      .news-item {
        flex-direction: column;
        align-items: flex-start;
        padding: 20px;
      }

      .news-item-arrow {
        display: none;
      }

      .news-item-date {
        width: 60px;
        height: 60px;
      }

      .news-item-date .day {
        font-size: 1.4rem;
      }

      .footer-grid {
        grid-template-columns: 1fr;
        gap: 36px;
      }

      .section-head h2 {
        font-size: 1.75rem;
      }

      .cta-section h2 {
        font-size: 2rem;
      }

      .cta-section {
        padding: 72px 0;
      }

      .process-grid {
        grid-template-columns: 1fr;
      }

      .features-grid {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 520px) {
      .container {
        padding-left: 16px;
        padding-right: 16px;
      }

      .section {
        padding: 48px 0;
      }

      .hero-title {
        font-size: 1.75rem;
      }

      .hero-btns .btn {
        width: 100%;
      }

      .stats-grid {
        gap: 8px;
      }

      .stat-number {
        font-size: 1.75rem;
      }

      .stat-label {
        font-size: 0.8rem;
      }

      .category-card-image {
        height: 160px;
      }

      .faq-item summary {
        padding: 18px 20px;
        font-size: 0.95rem;
      }

      .faq-answer {
        padding: 0 20px 18px 44px;
        font-size: 0.88rem;
      }
    }

/* roulang page: category1 */
:root {
            --primary: #1a56db;
            --primary-dark: #1e40af;
            --primary-light: #dbeafe;
            --accent: #f59e0b;
            --accent-dark: #d97706;
            --bg-neutral: #f8fafc;
            --bg-dark: #1e293b;
            --text-main: #0f172a;
            --text-soft: #475569;
            --text-faint: #94a3b8;
            --border-light: #e2e8f0;
            --radius-md: 0.75rem;
            --radius-lg: 1rem;
            --radius-xl: 1.5rem;
            --shadow-card: 0 1px 3px rgba(0,0,0,0.06), 0 4px 16px rgba(0,0,0,0.04);
            --shadow-hover: 0 4px 8px rgba(0,0,0,0.08), 0 12px 32px rgba(0,0,0,0.08);
            --transition-base: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            line-height: 1.6;
            color: var(--text-main);
            background-color: #ffffff;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

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

        button {
            border: none;
            cursor: pointer;
            background: none;
            font-family: inherit;
        }

        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header & Nav ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.7);
            box-shadow: 0 1px 0 rgba(15, 23, 42, 0.03);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 76px;
            gap: 24px;
            position: relative;
        }

        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .nav-link {
            padding: 8px 16px;
            border-radius: 999px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-soft);
            transition: var(--transition-base);
            position: relative;
        }

        .nav-link:hover {
            color: var(--primary);
            background: #f0f4ff;
        }

        .nav-link.active {
            color: var(--primary);
            background: var(--primary-light);
            font-weight: 600;
        }

        .brand-logo {
            font-size: 22px;
            font-weight: 800;
            letter-spacing: -0.02em;
            color: var(--text-main);
            white-space: nowrap;
            background: linear-gradient(135deg, #0f172a 0%, #1a56db 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            transition: var(--transition-base);
            position: absolute;
            left: 50%;
            transform: translateX(-50%);
            line-height: 1.2;
        }

        .brand-logo:hover {
            opacity: 0.85;
        }

        .mobile-menu-toggle {
            display: none;
            width: 44px;
            height: 44px;
            border-radius: 12px;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--text-soft);
            background: var(--bg-neutral);
            transition: var(--transition-base);
        }

        .mobile-menu-toggle:hover {
            background: var(--primary-light);
            color: var(--primary);
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: 76px;
            left: 0;
            right: 0;
            background: #ffffff;
            border-bottom: 1px solid var(--border-light);
            box-shadow: 0 16px 32px rgba(0, 0, 0, 0.08);
            padding: 16px 24px;
            flex-direction: column;
            gap: 4px;
            z-index: 999;
        }

        .mobile-menu.open {
            display: flex;
        }

        .mobile-link {
            padding: 12px 16px;
            border-radius: 12px;
            font-size: 16px;
            font-weight: 500;
            color: var(--text-soft);
            transition: var(--transition-base);
        }

        .mobile-link:hover {
            background: var(--bg-neutral);
            color: var(--primary);
        }

        .mobile-link.active {
            color: var(--primary);
            background: var(--primary-light);
            font-weight: 600;
        }

        /* ===== Hero Banner ===== */
        .category-hero {
            position: relative;
            padding: 100px 0 90px;
            background-image: linear-gradient(135deg, rgba(15, 23, 42, 0.88) 0%, rgba(30, 64, 175, 0.76) 60%, rgba(30, 58, 138, 0.82) 100%),
                url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            color: #ffffff;
            overflow: hidden;
        }

        .category-hero::after {
            content: '';
            position: absolute;
            bottom: -60px;
            right: -40px;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.04);
            pointer-events: none;
        }

        .category-hero .hero-content {
            max-width: 760px;
            position: relative;
            z-index: 2;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.12);
            border: 1px solid rgba(255, 255, 255, 0.18);
            border-radius: 999px;
            padding: 6px 16px;
            font-size: 14px;
            font-weight: 500;
            letter-spacing: 0.02em;
            margin-bottom: 24px;
            backdrop-filter: blur(4px);
        }

        .hero-badge i {
            color: var(--accent);
        }

        .category-hero h1 {
            font-size: 44px;
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.02em;
            margin-bottom: 20px;
        }

        .category-hero h1 span {
            color: #60a5fa;
        }

        .category-hero p {
            font-size: 17px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 32px;
        }

        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 28px;
            border-radius: 999px;
            font-size: 15px;
            font-weight: 600;
            color: #ffffff;
            background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
            box-shadow: 0 4px 12px rgba(37, 99, 235, 0.35);
            transition: var(--transition-base);
            border: none;
            cursor: pointer;
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(37, 99, 235, 0.4);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(37, 99, 235, 0.3);
        }

        .btn-primary:focus-visible {
            outline: 3px solid rgba(37, 99, 235, 0.5);
            outline-offset: 2px;
        }

        .btn-ghost {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 28px;
            border-radius: 999px;
            font-size: 15px;
            font-weight: 600;
            color: #ffffff;
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.22);
            transition: var(--transition-base);
            cursor: pointer;
        }

        .btn-ghost:hover {
            background: rgba(255, 255, 255, 0.16);
            border-color: rgba(255, 255, 255, 0.35);
            transform: translateY(-2px);
        }

        .btn-ghost:focus-visible {
            outline: 3px solid rgba(255, 255, 255, 0.4);
            outline-offset: 2px;
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb {
            padding: 16px 0;
            border-bottom: 1px solid var(--border-light);
            background: var(--bg-neutral);
        }

        .breadcrumb-list {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-faint);
        }

        .breadcrumb-list a {
            color: var(--text-soft);
            transition: var(--transition-base);
        }

        .breadcrumb-list a:hover {
            color: var(--primary);
        }

        .breadcrumb-list span {
            color: var(--text-main);
            font-weight: 500;
        }

        .breadcrumb-list i {
            font-size: 12px;
            color: var(--text-faint);
        }

        /* ===== Section shared ===== */
        .section {
            padding: 80px 0;
        }

        .section-alt {
            background-color: var(--bg-neutral);
        }

        .section-header {
            margin-bottom: 48px;
            text-align: center;
        }

        .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--primary);
            background: var(--primary-light);
            padding: 6px 16px;
            border-radius: 999px;
            margin-bottom: 16px;
        }

        .section-header h2 {
            font-size: 32px;
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: -0.02em;
            margin-bottom: 12px;
        }

        .section-header p {
            font-size: 16px;
            color: var(--text-soft);
            max-width: 640px;
            margin: 0 auto;
            line-height: 1.7;
        }

        /* ===== News Card Grid ===== */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .news-card {
            background: #ffffff;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: var(--transition-base);
            display: flex;
            flex-direction: column;
        }

        .news-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(37, 99, 235, 0.2);
        }

        .news-card-cover {
            position: relative;
            aspect-ratio: 16 / 10;
            overflow: hidden;
        }

        .news-card-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .news-card:hover .news-card-cover img {
            transform: scale(1.05);
        }

        .news-card-tag {
            position: absolute;
            top: 16px;
            left: 16px;
            background: rgba(255, 255, 255, 0.95);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 999px;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
            backdrop-filter: blur(4px);
        }

        .news-card-body {
            padding: 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .news-card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            color: var(--text-faint);
            margin-bottom: 12px;
        }

        .news-card-meta i {
            font-size: 14px;
            color: var(--primary);
        }

        .news-card-meta .dot {
            width: 3px;
            height: 3px;
            border-radius: 50%;
            background: var(--text-faint);
        }

        .news-card-body h3 {
            font-size: 17px;
            font-weight: 700;
            line-height: 1.5;
            margin-bottom: 10px;
            color: var(--text-main);
            transition: var(--transition-base);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-card:hover .news-card-body h3 {
            color: var(--primary);
        }

        .news-card-body p {
            font-size: 14px;
            line-height: 1.7;
            color: var(--text-soft);
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 16px;
        }

        .news-card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            transition: var(--transition-base);
        }

        .news-card-link i {
            transition: transform 0.3s ease;
        }

        .news-card-link:hover i {
            transform: translateX(4px);
        }

        /* ===== Category Tabs ===== */
        .category-tabs {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 10px;
            margin-bottom: 48px;
        }

        .category-tab {
            padding: 10px 22px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-soft);
            background: #ffffff;
            border: 1px solid var(--border-light);
            cursor: pointer;
            transition: var(--transition-base);
        }

        .category-tab:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--primary-light);
        }

        .category-tab.active {
            background: var(--primary);
            color: #ffffff;
            border-color: var(--primary);
            font-weight: 600;
            box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
        }

        .category-tab:focus-visible {
            outline: 3px solid rgba(37, 99, 235, 0.4);
            outline-offset: 2px;
        }

        /* ===== Featured Article ===== */
        .featured-grid {
            display: grid;
            grid-template-columns: 1.1fr 1fr;
            gap: 32px;
            align-items: stretch;
        }

        .featured-card-large {
            position: relative;
            border-radius: var(--radius-xl);
            overflow: hidden;
            min-height: 420px;
            display: flex;
            align-items: flex-end;
            box-shadow: var(--shadow-card);
            transition: var(--transition-base);
        }

        .featured-card-large:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }

        .featured-card-large img {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .featured-card-large::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(15, 23, 42, 0) 30%, rgba(15, 23, 42, 0.92) 100%);
        }

        .featured-card-content {
            position: relative;
            z-index: 2;
            padding: 36px;
            color: #ffffff;
        }

        .featured-card-content .featured-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.04em;
            color: #ffffff;
            background: rgba(245, 158, 11, 0.9);
            padding: 4px 12px;
            border-radius: 999px;
            margin-bottom: 14px;
        }

        .featured-card-content h3 {
            font-size: 24px;
            font-weight: 700;
            line-height: 1.4;
            margin-bottom: 10px;
        }

        .featured-card-content p {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.8);
            margin-bottom: 16px;
            max-width: 90%;
        }

        .featured-card-meta {
            display: flex;
            gap: 16px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.7);
        }

        .featured-side-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .featured-side-item {
            display: flex;
            gap: 16px;
            background: #ffffff;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-light);
            padding: 16px;
            box-shadow: var(--shadow-card);
            transition: var(--transition-base);
        }

        .featured-side-item:hover {
            box-shadow: var(--shadow-hover);
            transform: translateX(4px);
            border-color: rgba(37, 99, 235, 0.2);
        }

        .featured-side-item .thumb {
            width: 100px;
            height: 80px;
            border-radius: 12px;
            object-fit: cover;
            flex-shrink: 0;
        }

        .featured-side-item .item-body {
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .featured-side-item .item-tag {
            font-size: 11px;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 4px;
        }

        .featured-side-item h4 {
            font-size: 15px;
            font-weight: 600;
            line-height: 1.5;
            margin-bottom: 6px;
            display: -webkit-box;
            -webkit-line-clamp: 1;
            -webkit-box-orient: vertical;
            overflow: hidden;
            transition: var(--transition-base);
        }

        .featured-side-item:hover h4 {
            color: var(--primary);
        }

        .featured-side-item .item-meta {
            font-size: 12px;
            color: var(--text-faint);
            margin-top: auto;
        }

        /* ===== Stats Band ===== */
        .stats-band {
            background: linear-gradient(135deg, #1e293b 0%, #1e3a8a 100%);
            color: #ffffff;
            padding: 64px 0;
            position: relative;
            overflow: hidden;
        }

        .stats-band::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -60px;
            width: 260px;
            height: 260px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.05);
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            text-align: center;
        }

        .stat-item {
            padding: 24px;
            border-radius: var(--radius-lg);
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: var(--transition-base);
        }

        .stat-item:hover {
            background: rgba(255, 255, 255, 0.1);
            transform: translateY(-4px);
        }

        .stat-number {
            font-size: 40px;
            font-weight: 800;
            line-height: 1.2;
            background: linear-gradient(135deg, #ffffff 0%, #93c5fd 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: 8px;
        }

        .stat-label {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
            letter-spacing: 0.02em;
        }

        /* ===== CTA Section ===== */
        .cta-section {
            padding: 80px 0;
            position: relative;
        }

        .cta-card {
            background: linear-gradient(135deg, #1e40af 0%, #2563eb 100%);
            border-radius: var(--radius-xl);
            padding: 56px 48px;
            color: #ffffff;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 40px;
            box-shadow: 0 12px 40px rgba(30, 64, 175, 0.3);
            position: relative;
            overflow: hidden;
        }

        .cta-card::after {
            content: '';
            position: absolute;
            bottom: -40px;
            right: -40px;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
        }

        .cta-content {
            position: relative;
            z-index: 2;
        }

        .cta-content h3 {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .cta-content p {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.8);
            line-height: 1.7;
        }

        .cta-actions {
            display: flex;
            gap: 16px;
            flex-shrink: 0;
            position: relative;
            z-index: 2;
        }

        .btn-white {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 28px;
            border-radius: 999px;
            font-size: 15px;
            font-weight: 600;
            color: var(--primary);
            background: #ffffff;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
            transition: var(--transition-base);
        }

        .btn-white:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
        }

        .btn-white:focus-visible {
            outline: 3px solid rgba(255, 255, 255, 0.5);
            outline-offset: 2px;
        }

        .btn-outline-white {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 28px;
            border-radius: 999px;
            font-size: 15px;
            font-weight: 600;
            color: #ffffff;
            background: transparent;
            border: 1.5px solid rgba(255, 255, 255, 0.5);
            transition: var(--transition-base);
        }

        .btn-outline-white:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: #ffffff;
            transform: translateY(-2px);
        }

        .btn-outline-white:focus-visible {
            outline: 3px solid rgba(255, 255, 255, 0.35);
            outline-offset: 2px;
        }

        /* ===== FAQ ===== */
        .faq-wrap {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: #ffffff;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: var(--transition-base);
        }

        .faq-item:hover {
            border-color: rgba(37, 99, 235, 0.25);
            box-shadow: var(--shadow-card);
        }

        .faq-item summary {
            list-style: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 20px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            cursor: pointer;
            transition: var(--transition-base);
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary:hover {
            color: var(--primary);
        }

        .faq-item summary i {
            font-size: 14px;
            color: var(--text-faint);
            transition: transform 0.3s ease;
        }

        .faq-item[open] summary i {
            transform: rotate(180deg);
            color: var(--primary);
        }

        .faq-item .faq-answer {
            padding: 0 24px 20px;
            font-size: 14px;
            line-height: 1.8;
            color: var(--text-soft);
            border-top: 1px solid var(--border-light);
            padding-top: 16px;
            margin-top: 0;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #0f172a;
            color: #94a3b8;
            padding: 64px 0 0;
            font-size: 14px;
            line-height: 1.7;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1.2fr;
            gap: 48px;
            padding-bottom: 48px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-brand .brand-logo {
            position: static;
            transform: none;
            background: linear-gradient(135deg, #ffffff 0%, #93c5fd 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            font-size: 24px;
            font-weight: 800;
            margin-bottom: 16px;
            display: inline-block;
        }

        .footer-brand p {
            max-width: 300px;
            color: #64748b;
            font-size: 14px;
            line-height: 1.8;
        }

        .footer-col h3 {
            color: #e2e8f0;
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 20px;
            position: relative;
            padding-bottom: 10px;
        }

        .footer-col h3::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 32px;
            height: 2px;
            border-radius: 2px;
            background: var(--primary);
        }

        .footer-links {
            list-style: none;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-links a {
            color: #94a3b8;
            transition: var(--transition-base);
        }

        .footer-links a:hover {
            color: #ffffff;
            padding-left: 6px;
        }

        .footer-contact {
            list-style: none;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .footer-contact li {
            display: flex;
            align-items: center;
            gap: 12px;
            color: #94a3b8;
        }

        .footer-contact i {
            width: 32px;
            height: 32px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(255, 255, 255, 0.06);
            border-radius: 8px;
            color: #60a5fa;
            font-size: 14px;
            flex-shrink: 0;
        }

        .footer-bottom {
            padding: 24px 0;
            text-align: center;
            color: #475569;
            font-size: 13px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .news-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .featured-grid {
                grid-template-columns: 1fr;
            }

            .featured-card-large {
                min-height: 320px;
            }

            .cta-card {
                flex-direction: column;
                text-align: center;
                padding: 40px 32px;
            }

            .cta-actions {
                justify-content: center;
            }

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .header-inner {
                height: 64px;
            }

            .nav-left,
            .nav-right {
                display: none;
            }

            .mobile-menu-toggle {
                display: flex;
            }

            .brand-logo {
                font-size: 18px;
                position: static;
                transform: none;
            }

            .mobile-menu {
                top: 64px;
            }

            .section {
                padding: 56px 0;
            }

            .category-hero {
                padding: 64px 0 56px;
            }

            .category-hero h1 {
                font-size: 32px;
            }

            .category-hero p {
                font-size: 15px;
            }

            .section-header h2 {
                font-size: 26px;
            }

            .news-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .featured-side-item .thumb {
                width: 80px;
                height: 64px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }

            .stat-number {
                font-size: 32px;
            }

            .cta-actions {
                flex-direction: column;
                width: 100%;
            }

            .btn-white,
            .btn-outline-white {
                width: 100%;
                justify-content: center;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }

            .category-hero h1 {
                font-size: 26px;
            }

            .section-header h2 {
                font-size: 22px;
            }

            .hero-actions {
                flex-direction: column;
                width: 100%;
            }

            .btn-primary,
            .btn-ghost {
                justify-content: center;
                width: 100%;
            }

            .category-tabs {
                flex-wrap: nowrap;
                overflow-x: auto;
                justify-content: flex-start;
                -webkit-overflow-scrolling: touch;
                padding-bottom: 8px;
            }

            .category-tab {
                flex-shrink: 0;
            }

            .featured-card-content {
                padding: 24px;
            }

            .featured-card-content h3 {
                font-size: 19px;
            }

            .stats-grid {
                grid-template-columns: 1fr;
            }

            .cta-card {
                padding: 32px 20px;
            }
        }

/* roulang page: category2 */
/* ===== 设计变量 ===== */
        :root {
            --color-primary: #4f46e5;
            --color-primary-dark: #4338ca;
            --color-primary-deep: #1e1b4b;
            --color-accent: #f59e0b;
            --color-bg: #f8fafc;
            --color-card: #ffffff;
            --color-text: #0f172a;
            --color-text-weak: #64748b;
            --color-border: #e2e8f0;
            --radius-md: 16px;
            --radius-lg: 24px;
            --shadow-card: 0 4px 24px rgba(15, 23, 42, 0.06);
            --shadow-hover: 0 12px 40px rgba(15, 23, 42, 0.12);
            --padding-section: 72px 0;
        }

        /* ===== 基础 Reset ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            font-size: 16px;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-body), 'Helvetica Neue', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            background-color: var(--color-bg);
            color: var(--color-text);
            line-height: 1.7;
            overflow-x: hidden;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.25s ease, background-color 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
        }

        button {
            border: none;
            background: none;
            cursor: pointer;
            font-family: inherit;
        }

        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
        }

        ul,
        ol {
            list-style: none;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== 导航 ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(15, 23, 42, 0.95);
            backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 16px;
        }

        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: 24px;
            flex: 1;
        }

        .nav-right {
            justify-content: flex-end;
        }

        .nav-link {
            font-size: 15px;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.7);
            padding: 8px 4px;
            position: relative;
            white-space: nowrap;
            letter-spacing: 0.3px;
        }

        .nav-link::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--color-accent);
            transform: scaleX(0);
            transform-origin: left;
            transition: transform 0.3s ease;
            border-radius: 2px;
        }

        .nav-link:hover,
        .nav-link.active {
            color: #ffffff;
        }

        .nav-link:hover::after,
        .nav-link.active::after {
            transform: scaleX(1);
        }

        .brand-logo {
            font-size: 20px;
            font-weight: 800;
            color: #ffffff;
            letter-spacing: 0.5px;
            white-space: nowrap;
            background: linear-gradient(135deg, #ffffff, #c7d2fe);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            padding: 4px 10px;
        }

        .mobile-menu-toggle {
            display: none;
            font-size: 22px;
            color: #ffffff;
            padding: 8px;
        }

        .mobile-menu {
            display: none;
            flex-direction: column;
            padding: 16px 24px 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
        }

        .mobile-menu.open {
            display: flex;
        }

        .mobile-link {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.8);
            padding: 14px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

        .mobile-link:last-child {
            border-bottom: none;
        }

        .mobile-link.active {
            color: #ffffff;
            font-weight: 600;
        }

        /* ===== Hero 横幅 ===== */
        .page-hero {
            position: relative;
            padding: 120px 0 100px;
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.92), rgba(30, 27, 75, 0.85)), url('/assets/images/backpic/back-2.png') center/cover;
            overflow: hidden;
            text-align: center;
        }

        .page-hero::before {
            content: '';
            position: absolute;
            top: -60%;
            right: -20%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(79, 70, 229, 0.35) 0%, transparent 70%);
            border-radius: 50%;
        }

        .page-hero .container {
            position: relative;
            z-index: 2;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.12);
            border: 1px solid rgba(255, 255, 255, 0.2);
            color: #e0e7ff;
            font-size: 14px;
            font-weight: 500;
            padding: 8px 18px;
            border-radius: 999px;
            margin-bottom: 24px;
            backdrop-filter: blur(8px);
        }

        .page-hero h1 {
            font-size: 52px;
            font-weight: 800;
            color: #ffffff;
            line-height: 1.2;
            margin-bottom: 20px;
            letter-spacing: 1px;
            text-shadow: 0 4px 24px rgba(15, 23, 42, 0.4);
        }

        .page-hero h1 span {
            color: #fbbf24;
        }

        .hero-desc {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.75);
            max-width: 680px;
            margin: 0 auto 32px;
            line-height: 1.8;
        }

        .hero-actions {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            padding: 14px 32px;
            border-radius: 50px;
            font-size: 16px;
            font-weight: 600;
            letter-spacing: 0.3px;
            transition: all 0.3s ease;
            cursor: pointer;
            line-height: 1.2;
        }

        .btn-primary {
            background: linear-gradient(135deg, #4f46e5, #6366f1);
            color: #ffffff;
            box-shadow: 0 4px 20px rgba(79, 70, 229, 0.35);
        }

        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 32px rgba(79, 70, 229, 0.45);
        }

        .btn-outline {
            background: transparent;
            color: #ffffff;
            border: 2px solid rgba(255, 255, 255, 0.4);
            backdrop-filter: blur(4px);
        }

        .btn-outline:hover {
            border-color: #ffffff;
            background: rgba(255, 255, 255, 0.1);
            transform: translateY(-3px);
        }

        /* ===== 区块通用 ===== */
        .section {
            padding: 72px 0;
        }

        .section-alt {
            background-color: #ffffff;
        }

        .section-accent {
            background: linear-gradient(180deg, #f8fafc 0%, #eef2ff 100%);
        }

        .section-header {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 56px;
        }

        .section-tag {
            display: inline-block;
            font-size: 14px;
            font-weight: 600;
            color: #4f46e5;
            background: #eef2ff;
            padding: 6px 18px;
            border-radius: 999px;
            letter-spacing: 1px;
            margin-bottom: 16px;
        }

        .section-title {
            font-size: 32px;
            font-weight: 800;
            color: #0f172a;
            line-height: 1.3;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }

        .section-desc {
            font-size: 16px;
            color: #64748b;
            line-height: 1.8;
        }

        /* ===== 数据分类卡片 ===== */
        .data-cat-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .data-cat-card {
            background: #ffffff;
            border-radius: 16px;
            padding: 36px 24px;
            text-align: center;
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-card);
            transition: all 0.3s ease;
        }

        .data-cat-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-hover);
            border-color: #c7d2fe;
        }

        .cat-icon {
            width: 68px;
            height: 68px;
            border-radius: 18px;
            background: linear-gradient(135deg, #eef2ff, #e0e7ff);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 28px;
            color: #4f46e5;
            margin: 0 auto 20px;
        }

        .data-cat-card h3 {
            font-size: 17px;
            font-weight: 700;
            color: #0f172a;
            margin-bottom: 8px;
        }

        .data-cat-card p {
            font-size: 14px;
            color: #64748b;
            line-height: 1.6;
        }

        /* ===== 内容卡片 ===== */
        .content-card {
            background: #ffffff;
            border-radius: 20px;
            overflow: hidden;
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-card);
            transition: all 0.35s ease;
            height: 100%;
            display: flex;
            flex-direction: column;
        }

        .content-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-hover);
        }

        .card-img-wrap {
            position: relative;
            overflow: hidden;
            height: 200px;
        }

        .card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .content-card:hover .card-img-wrap img {
            transform: scale(1.05);
        }

        .card-badge {
            position: absolute;
            top: 16px;
            left: 16px;
            background: rgba(15, 23, 42, 0.8);
            backdrop-filter: blur(8px);
            color: #ffffff;
            font-size: 13px;
            font-weight: 500;
            padding: 5px 14px;
            border-radius: 999px;
        }

        .card-body {
            padding: 24px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            color: #94a3b8;
            margin-bottom: 12px;
        }

        .card-meta span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .card-body h3 {
            font-size: 18px;
            font-weight: 700;
            color: #0f172a;
            margin-bottom: 10px;
            line-height: 1.4;
        }

        .card-body p {
            font-size: 14px;
            color: #64748b;
            line-height: 1.7;
            flex: 1;
        }

        .card-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            font-weight: 600;
            color: #4f46e5;
            margin-top: 16px;
        }

        .card-link i {
            transition: transform 0.3s ease;
        }

        .card-link:hover i {
            transform: translateX(4px);
        }

        /* ===== 数据图表 / 统计区块 ===== */
        .stats-panel {
            background: #1e1b4b;
            border-radius: 24px;
            padding: 48px;
            color: #ffffff;
            position: relative;
            overflow: hidden;
        }

        .stats-panel::before {
            content: '';
            position: absolute;
            top: -100px;
            right: -100px;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(99, 102, 241, 0.4) 0%, transparent 70%);
        }

        .stats-inner {
            position: relative;
            z-index: 2;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-bottom: 32px;
        }

        .stat-item {
            text-align: center;
        }

        .stat-number {
            font-size: 42px;
            font-weight: 800;
            background: linear-gradient(135deg, #ffffff, #c7d2fe);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            margin-bottom: 4px;
        }

        .stat-label {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
        }

        /* ===== 流程步骤 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
        }

        .step-item {
            position: relative;
            padding: 36px 28px;
            background: #ffffff;
            border-radius: 20px;
            border: 1px solid var(--color-border);
            transition: all 0.3s ease;
        }

        .step-item:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-6px);
        }

        .step-number {
            width: 48px;
            height: 48px;
            border-radius: 14px;
            background: linear-gradient(135deg, #4f46e5, #818cf8);
            color: #ffffff;
            font-size: 20px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
        }

        .step-item h3 {
            font-size: 18px;
            font-weight: 700;
            color: #0f172a;
            margin-bottom: 10px;
        }

        .step-item p {
            font-size: 14px;
            color: #64748b;
            line-height: 1.7;
        }

        /* ===== FAQ ===== */
        .faq-container {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background: #ffffff;
            border: 1px solid var(--color-border);
            border-radius: 16px;
            margin-bottom: 16px;
            overflow: hidden;
            transition: all 0.3s ease;
        }

        .faq-item:hover {
            box-shadow: var(--shadow-card);
            border-color: #c7d2fe;
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 22px 28px;
            font-size: 17px;
            font-weight: 600;
            color: #0f172a;
            cursor: pointer;
            gap: 16px;
        }

        .faq-icon {
            font-size: 18px;
            color: #4f46e5;
            flex-shrink: 0;
            transition: transform 0.3s ease;
        }

        .faq-item.active .faq-icon {
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease;
        }

        .faq-answer p {
            padding: 0 28px 24px;
            font-size: 15px;
            color: #64748b;
            line-height: 1.8;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 72px 0;
        }

        .cta-box {
            background: linear-gradient(135deg, #1e1b4b 0%, #4338ca 100%);
            border-radius: 24px;
            padding: 56px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-box::before {
            content: '';
            position: absolute;
            top: -50%;
            left: 50%;
            transform: translateX(-50%);
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
            border-radius: 50%;
        }

        .cta-box h2 {
            font-size: 32px;
            font-weight: 800;
            color: #ffffff;
            margin-bottom: 16px;
            position: relative;
        }

        .cta-box p {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.7);
            max-width: 560px;
            margin: 0 auto 32px;
            position: relative;
        }

        .cta-actions {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
            position: relative;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: #0f172a;
            color: #94a3b8;
            padding: 64px 0 24px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr;
            gap: 42px;
            margin-bottom: 48px;
        }

        .footer-brand .brand-logo {
            font-size: 26px;
            margin-bottom: 16px;
            display: inline-block;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            margin-top: 16px;
            max-width: 340px;
        }

        .footer-col h3 {
            font-size: 17px;
            font-weight: 600;
            color: #ffffff;
            margin-bottom: 20px;
        }

        .footer-links li {
            margin-bottom: 10px;
        }

        .footer-links a {
            font-size: 14px;
            color: #94a3b8;
            transition: color 0.3s ease;
        }

        .footer-links a:hover {
            color: #fbbf24;
        }

        .footer-contact li {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 14px;
            margin-bottom: 12px;
        }

        .footer-contact i {
            color: #4f46e5;
            width: 16px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 24px;
            text-align: center;
            font-size: 14px;
        }

        /* ===== 响应式断点 ===== */
        @media (max-width: 1024px) {
            .data-cat-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 32px;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .nav-left,
            .nav-right {
                display: none;
            }

            .mobile-menu-toggle {
                display: block;
            }

            .header-inner {
                height: 64px;
            }

            .brand-logo {
                font-size: 18px;
            }

            .page-hero {
                padding: 90px 0 80px;
            }

            .page-hero h1 {
                font-size: 36px;
            }

            .hero-desc {
                font-size: 16px;
            }

            .section {
                padding: 56px 0;
            }

            .section-title {
                font-size: 26px;
            }

            .steps-grid {
                grid-template-columns: 1fr;
            }

            .cta-box {
                padding: 40px 24px;
            }

            .cta-box h2 {
                font-size: 26px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .stats-grid {
                grid-template-columns: 1fr 1fr;
            }

            .stat-number {
                font-size: 32px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }

            .data-cat-grid {
                grid-template-columns: 1fr;
            }

            .stats-grid {
                grid-template-columns: 1fr;
            }

            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }

            .hero-actions .btn {
                width: 100%;
            }

            .page-hero h1 {
                font-size: 30px;
            }

            .section-title {
                font-size: 22px;
            }

            .btn {
                padding: 12px 24px;
                font-size: 15px;
            }
        }

/* roulang page: article */
:root {
        --primary: #1e5eff;
        --primary-dark: #1040c9;
        --primary-light: #eef4ff;
        --accent: #ff6a00;
        --dark: #16233a;
        --text: #334155;
        --text-light: #64748b;
        --bg: #f6f9fd;
        --white: #ffffff;
        --border: #e2e8f0;
        --radius: 16px;
        --shadow: 0 8px 30px rgba(22, 35, 58, 0.08);
        --shadow-hover: 0 14px 40px rgba(22, 35, 58, 0.14);
        --font: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
    }
    * {
        box-sizing: border-box;
        margin: 0;
        padding: 0;
    }
    html {
        scroll-behavior: smooth;
        -webkit-text-size-adjust: 100%;
    }
    body {
        font-family: var(--font);
        background: var(--bg);
        color: var(--text);
        line-height: 1.65;
        -webkit-font-smoothing: antialiased;
    }
    a {
        color: inherit;
        text-decoration: none;
        transition: all 0.22s ease;
    }
    a:focus-visible,
    button:focus-visible,
    input:focus-visible {
        outline: 3px solid rgba(30, 94, 255, 0.35);
        outline-offset: 2px;
        border-radius: 6px;
    }
    .site-container {
        max-width: 1200px;
        margin: 0 auto;
        padding-left: 1.5rem;
        padding-right: 1.5rem;
    }
    .site-header {
        position: sticky;
        top: 0;
        z-index: 100;
        background: rgba(255, 255, 255, 0.92);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        border-bottom: 1px solid var(--border);
        box-shadow: 0 2px 16px rgba(22, 35, 58, 0.04);
    }
    .header-inner {
        position: relative;
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: 74px;
        gap: 1rem;
    }
    .nav-left,
    .nav-right {
        display: flex;
        align-items: center;
        gap: 0.375rem;
    }
    .nav-link {
        display: inline-flex;
        align-items: center;
        padding: 0.5rem 1rem;
        border-radius: 10px;
        font-size: 0.9375rem;
        font-weight: 500;
        color: var(--text);
        transition: all 0.22s ease;
        white-space: nowrap;
    }
    .nav-link:hover {
        background: var(--primary-light);
        color: var(--primary);
    }
    .nav-link.active {
        background: var(--primary);
        color: #fff;
        box-shadow: 0 4px 12px rgba(30, 94, 255, 0.25);
    }
    .brand-logo {
        font-size: 1.3125rem;
        font-weight: 800;
        letter-spacing: -0.01em;
        color: var(--dark);
        white-space: nowrap;
        background: linear-gradient(135deg, var(--primary), var(--primary-dark));
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
    }
    .mobile-menu-toggle {
        display: none;
        width: 42px;
        height: 42px;
        align-items: center;
        justify-content: center;
        border-radius: 12px;
        border: 1px solid var(--border);
        background: var(--white);
        color: var(--dark);
        font-size: 1.125rem;
        cursor: pointer;
        transition: all 0.22s ease;
        position: absolute;
        right: 0;
        top: 50%;
        transform: translateY(-50%);
    }
    .mobile-menu-toggle:hover {
        background: var(--primary-light);
        color: var(--primary);
        border-color: var(--primary);
    }
    .mobile-menu {
        display: none;
        flex-direction: column;
        padding: 0.75rem 1.5rem 1.25rem;
        background: var(--white);
        border-top: 1px solid var(--border);
        box-shadow: 0 16px 40px rgba(22, 35, 58, 0.08);
    }
    .mobile-menu.open {
        display: flex;
    }
    .mobile-link {
        display: block;
        padding: 0.8125rem 1rem;
        border-radius: 12px;
        font-size: 1rem;
        font-weight: 500;
        color: var(--text);
        transition: all 0.2s ease;
        margin-bottom: 0.25rem;
    }
    .mobile-link:hover,
    .mobile-link.active {
        background: var(--primary-light);
        color: var(--primary);
    }
    .article-hero {
        position: relative;
        padding: 5rem 0 3.5rem;
        background-size: cover;
        background-position: center;
        color: #fff;
    }
    .article-hero::after {
        content: '';
        position: absolute;
        inset: 0;
        background: linear-gradient(180deg, rgba(10, 20, 40, 0.72) 0%, rgba(10, 20, 40, 0.86) 100%);
    }
    .article-hero .site-container {
        position: relative;
        z-index: 2;
    }
    .breadcrumb {
        display: flex;
        align-items: center;
        flex-wrap: wrap;
        gap: 0.5rem;
        font-size: 0.875rem;
        color: rgba(255, 255, 255, 0.75);
        margin-bottom: 1.5rem;
    }
    .breadcrumb i {
        font-size: 0.625rem;
        opacity: 0.7;
    }
    .breadcrumb a {
        color: rgba(255, 255, 255, 0.75);
    }
    .breadcrumb a:hover {
        color: #fff;
    }
    .breadcrumb .current {
        color: #fff;
        font-weight: 500;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
        max-width: 280px;
    }
    .category-badge {
        display: inline-flex;
        align-items: center;
        gap: 0.375rem;
        padding: 0.375rem 1rem;
        border-radius: 999px;
        background: rgba(255, 255, 255, 0.14);
        border: 1px solid rgba(255, 255, 255, 0.25);
        backdrop-filter: blur(8px);
        font-size: 0.8125rem;
        font-weight: 600;
        color: #fff;
        margin-bottom: 1rem;
        letter-spacing: 0.02em;
    }
    .article-hero h1 {
        font-size: 2rem;
        line-height: 1.3;
        font-weight: 800;
        color: #fff;
        max-width: 50ch;
        margin-bottom: 1.25rem;
        letter-spacing: -0.02em;
    }
    .article-meta {
        display: flex;
        flex-wrap: wrap;
        gap: 1.25rem;
        font-size: 0.9375rem;
        color: rgba(255, 255, 255, 0.78);
    }
    .article-meta span {
        display: inline-flex;
        align-items: center;
        gap: 0.5rem;
    }
    .article-main {
        background: var(--white);
        border-radius: var(--radius);
        border: 1px solid var(--border);
        box-shadow: var(--shadow);
        padding: 2.5rem;
    }
    .article-content {
        font-size: 1.0625rem;
        line-height: 1.9;
        color: var(--text);
        margin-top: 2rem;
    }
    .article-content p {
        margin-bottom: 1.5rem;
    }
    .article-content h2 {
        font-size: 1.5rem;
        font-weight: 700;
        color: var(--dark);
        margin: 2.25rem 0 1.125rem;
        letter-spacing: -0.01em;
    }
    .article-content h3 {
        font-size: 1.25rem;
        font-weight: 700;
        color: var(--dark);
        margin: 1.75rem 0 0.875rem;
    }
    .article-content ul {
        list-style: disc;
        padding-left: 1.5rem;
        margin-bottom: 1.5rem;
    }
    .article-content ol {
        list-style: decimal;
        padding-left: 1.5rem;
        margin-bottom: 1.5rem;
    }
    .article-content li {
        margin-bottom: 0.625rem;
    }
    .article-content blockquote {
        border-left: 4px solid var(--primary);
        background: var(--primary-light);
        padding: 1.25rem 1.5rem;
        border-radius: 0 12px 12px 0;
        margin: 2rem 0;
        color: var(--dark);
        font-weight: 500;
    }
    .article-content img {
        border-radius: 12px;
        margin: 1.75rem 0;
        max-width: 100%;
        height: auto;
    }
    .article-content a {
        color: var(--primary);
        font-weight: 500;
        text-decoration: underline;
        text-underline-offset: 3px;
    }
    .article-content a:hover {
        color: var(--primary-dark);
    }
    .article-tags {
        display: flex;
        flex-wrap: wrap;
        gap: 0.625rem;
        margin-top: 2.5rem;
        padding-top: 1.5rem;
        border-top: 1px solid var(--border);
    }
    .article-tag {
        display: inline-flex;
        align-items: center;
        gap: 0.375rem;
        padding: 0.4rem 0.9375rem;
        border-radius: 999px;
        background: var(--bg);
        border: 1px solid var(--border);
        font-size: 0.8125rem;
        font-weight: 500;
        color: var(--text-light);
        transition: all 0.22s ease;
    }
    .article-tag:hover {
        background: var(--primary-light);
        border-color: var(--primary);
        color: var(--primary);
    }
    .sidebar-card {
        background: var(--white);
        border-radius: var(--radius);
        border: 1px solid var(--border);
        box-shadow: var(--shadow);
        padding: 1.75rem;
        margin-bottom: 1.5rem;
    }
    .sidebar-card h4 {
        font-size: 1.0625rem;
        font-weight: 700;
        color: var(--dark);
    }
    .sidebar-card p {
        font-size: 0.9375rem;
        line-height: 1.7;
        color: var(--text-light);
    }
    .sidebar-link {
        display: flex;
        align-items: center;
        gap: 0.75rem;
        padding: 0.875rem 1rem;
        border-radius: 12px;
        font-size: 0.9375rem;
        font-weight: 500;
        color: var(--text);
        background: var(--bg);
        border: 1px solid transparent;
        transition: all 0.22s ease;
        margin-bottom: 0.5rem;
    }
    .sidebar-link:hover {
        background: var(--primary-light);
        color: var(--primary);
        border-color: var(--primary);
        transform: translateX(4px);
    }
    .article-not-found {
        background: var(--white);
        border-radius: var(--radius);
        border: 1px solid var(--border);
        box-shadow: var(--shadow);
        padding: 3.5rem 2rem;
        text-align: center;
    }
    .btn-primary {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 0.625rem;
        padding: 0.8125rem 2rem;
        border-radius: 12px;
        background: linear-gradient(135deg, var(--primary), var(--primary-dark));
        color: #fff;
        font-size: 1rem;
        font-weight: 600;
        box-shadow: 0 6px 20px rgba(30, 94, 255, 0.28);
        transition: all 0.25s ease;
        border: none;
        cursor: pointer;
    }
    .btn-primary:hover {
        transform: translateY(-2px);
        box-shadow: 0 10px 28px rgba(30, 94, 255, 0.36);
        color: #fff;
    }
    .btn-outline-light {
        display: inline-flex;
        align-items: center;
        gap: 0.5rem;
        padding: 0.75rem 1.75rem;
        border-radius: 12px;
        border: 1px solid rgba(255, 255, 255, 0.35);
        color: #fff;
        font-size: 0.9375rem;
        font-weight: 600;
        background: rgba(255, 255, 255, 0.08);
        backdrop-filter: blur(6px);
        transition: all 0.25s ease;
    }
    .btn-outline-light:hover {
        background: rgba(255, 255, 255, 0.18);
        border-color: rgba(255, 255, 255, 0.55);
        transform: translateY(-2px);
    }
    .related-card {
        background: var(--white);
        border-radius: var(--radius);
        border: 1px solid var(--border);
        box-shadow: var(--shadow);
        padding: 1.75rem;
        transition: all 0.25s ease;
        display: block;
        height: 100%;
    }
    .related-card:hover {
        border-color: var(--primary);
        box-shadow: var(--shadow-hover);
        transform: translateY(-4px);
    }
    .related-card h3 {
        font-size: 1.0625rem;
        font-weight: 700;
        color: var(--dark);
        margin: 0.75rem 0 0.5rem;
        line-height: 1.45;
        transition: color 0.22s ease;
    }
    .related-card:hover h3 {
        color: var(--primary);
    }
    .related-card p {
        font-size: 0.875rem;
        color: var(--text-light);
        line-height: 1.65;
        margin-bottom: 1rem;
    }
    .badge {
        display: inline-flex;
        align-items: center;
        gap: 0.375rem;
        padding: 0.3125rem 0.875rem;
        border-radius: 999px;
        background: var(--primary-light);
        color: var(--primary);
        font-size: 0.75rem;
        font-weight: 600;
        letter-spacing: 0.02em;
    }
    .cta-section {
        position: relative;
        background: linear-gradient(135deg, #16233a 0%, #1e2c4d 55%, #272f5e 100%);
        border-radius: 24px;
        padding: 3.5rem 2.5rem;
        text-align: center;
        color: #fff;
        overflow: hidden;
    }
    .cta-section::before {
        content: '';
        position: absolute;
        width: 360px;
        height: 360px;
        border-radius: 50%;
        background: radial-gradient(circle, rgba(30, 94, 255, 0.3) 0%, transparent 70%);
        top: -120px;
        right: -80px;
    }
    .cta-section::after {
        content: '';
        position: absolute;
        width: 280px;
        height: 280px;
        border-radius: 50%;
        background: radial-gradient(circle, rgba(255, 106, 0, 0.18) 0%, transparent 70%);
        bottom: -100px;
        left: -60px;
    }
    .cta-section .site-container {
        position: relative;
        z-index: 1;
    }
    .faq-item {
        background: var(--white);
        border: 1px solid var(--border);
        border-radius: var(--radius);
        padding: 1.5rem 1.75rem;
        transition: all 0.22s ease;
        box-shadow: 0 2px 10px rgba(22, 35, 58, 0.03);
    }
    .faq-item:hover {
        border-color: var(--primary);
        box-shadow: var(--shadow);
    }
    .faq-item h3 {
        font-size: 1.0625rem;
        font-weight: 700;
        color: var(--dark);
        margin-bottom: 0.5rem;
        display: flex;
        align-items: center;
        gap: 0.625rem;
    }
    .faq-item h3 i {
        color: var(--primary);
        font-size: 0.875rem;
    }
    .faq-item p {
        color: var(--text-light);
        line-height: 1.7;
        font-size: 0.9375rem;
        padding-left: 1.5rem;
    }
    .site-footer {
        background: #fff;
        border-top: 1px solid var(--border);
        margin-top: 5rem;
        padding: 3.5rem 0 0;
    }
    .footer-grid {
        display: grid;
        grid-template-columns: 1.6fr 1fr 1.2fr;
        gap: 3rem;
        padding-bottom: 2.5rem;
        border-bottom: 1px solid var(--border);
    }
    .footer-brand p {
        margin-top: 1rem;
        font-size: 0.9375rem;
        color: var(--text-light);
        line-height: 1.7;
        max-width: 36ch;
    }
    .footer-col h3 {
        font-size: 1rem;
        font-weight: 700;
        color: var(--dark);
        margin-bottom: 1.25rem;
    }
    .footer-links {
        list-style: none;
        display: flex;
        flex-direction: column;
        gap: 0.625rem;
    }
    .footer-links a,
    .footer-contact li {
        color: var(--text-light);
        font-size: 0.9375rem;
        transition: all 0.22s ease;
        display: inline-flex;
        align-items: center;
        gap: 0.5rem;
    }
    .footer-links a:hover {
        color: var(--primary);
        transform: translateX(4px);
    }
    .footer-contact {
        list-style: none;
        display: flex;
        flex-direction: column;
        gap: 0.625rem;
    }
    .footer-contact li i {
        color: var(--primary);
        width: 1rem;
        text-align: center;
    }
    .footer-bottom {
        padding: 1.25rem 0;
        text-align: center;
        font-size: 0.875rem;
        color: var(--text-light);
    }
    @media (max-width: 1024px) {
        .nav-left,
        .nav-right {
            display: none;
        }
        .mobile-menu-toggle {
            display: inline-flex;
        }
        .header-inner {
            display: flex;
            justify-content: center;
        }
        .site-header {
            position: relative;
        }
        .footer-grid {
            grid-template-columns: 1fr 1fr;
            gap: 2rem;
        }
    }
    @media (max-width: 768px) {
        .article-hero {
            padding: 3.5rem 0 2.5rem;
        }
        .article-hero h1 {
            font-size: 1.625rem;
        }
        .article-main {
            padding: 1.5rem;
        }
        .site-container {
            padding-left: 1.125rem;
            padding-right: 1.125rem;
        }
        .footer-grid {
            grid-template-columns: 1fr;
            gap: 1.75rem;
        }
        .cta-section {
            padding: 2.5rem 1.5rem;
        }
    }
    @media (max-width: 520px) {
        .brand-logo {
            font-size: 1.125rem;
        }
        .article-meta {
            gap: 0.875rem;
            font-size: 0.8125rem;
        }
        .breadcrumb .current {
            max-width: 180px;
        }
        .article-main {
            padding: 1.25rem;
        }
        .article-content {
            font-size: 1rem;
        }
        .related-card {
            padding: 1.375rem;
        }
    }
    @media (min-width: 1025px) {
        .mobile-menu {
            display: none !important;
        }
    }

/* roulang page: category3 */
:root {
      --primary-600: #0d9488;
      --primary-700: #0f766e;
      --primary-800: #115e59;
      --primary-900: #134e4a;
      --accent-500: #f59e0b;
      --text-dark: #1e293b;
      --text-muted: #64748b;
      --bg-light: #f8fafc;
      --border-light: #e2e8f0;
      --radius: 1rem;
      --shadow-sm: 0 4px 16px rgba(30, 41, 59, 0.06);
      --shadow-md: 0 8px 24px rgba(30, 41, 59, 0.10);
      --shadow-lg: 0 16px 40px rgba(30, 41, 59, 0.14);
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
      color: var(--text-dark);
      background: var(--bg-light);
      -webkit-font-smoothing: antialiased;
      text-rendering: optimizeLegibility;
    }

    ::selection {
      background: rgba(13, 148, 136, 0.15);
    }

    a:focus-visible,
    button:focus-visible,
    summary:focus-visible {
      outline: 3px solid rgba(13, 148, 136, 0.3);
      outline-offset: 2px;
      border-radius: 8px;
    }

    .site-header {
      transition: box-shadow .3s ease;
    }

    .header-inner {
      height: 76px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
    }

    .brand-logo {
      font-weight: 800;
      letter-spacing: 0.02em;
      text-decoration: none;
      white-space: nowrap;
      font-size: 1.35rem;
    }

    .nav-link {
      position: relative;
      text-decoration: none;
      transition: color .2s ease, background .2s ease;
    }

    .nav-link.active::after {
      content: '';
      position: absolute;
      left: 16px;
      right: 16px;
      bottom: 2px;
      height: 2px;
      background: var(--primary-600);
      border-radius: 999px;
    }

    .hero-section {
      min-height: 88vh;
    }

    .section-tag {
      display: inline-block;
      padding: 6px 18px;
      border-radius: 999px;
      background: rgba(13, 148, 136, 0.08);
      color: var(--primary-700);
      font-size: 0.8rem;
      font-weight: 600;
      letter-spacing: 0.06em;
    }

    .card-hover {
      transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease;
    }

    .card-hover:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-lg);
      border-color: rgba(13, 148, 136, 0.25);
    }

    .btn-primary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 14px 32px;
      border-radius: 999px;
      background: var(--primary-700);
      color: #fff;
      font-weight: 600;
      transition: all .3s ease;
      box-shadow: 0 4px 16px rgba(13, 148, 136, 0.3);
      text-decoration: none;
    }

    .btn-primary:hover {
      background: var(--primary-800);
      transform: translateY(-2px);
      box-shadow: 0 8px 24px rgba(13, 148, 136, 0.35);
    }

    .step-connector {
      position: relative;
    }

    @media (min-width: 1024px) {
      .step-connector:not(:last-child)::after {
        content: '';
        position: absolute;
        top: 28px;
        left: calc(50% + 38px);
        width: calc(100% - 76px);
        border-top: 2px dashed rgba(13, 148, 136, 0.25);
      }
    }

    .faq-item {
      transition: all .3s ease;
    }

    .faq-item summary::-webkit-details-marker {
      display: none;
    }

    .faq-item summary {
      list-style: none;
      cursor: pointer;
    }

    .faq-item[open] {
      box-shadow: var(--shadow-md);
      border-color: rgba(13, 148, 136, 0.3) !important;
    }

    .faq-item[open] .faq-icon {
      transform: rotate(180deg);
    }

    .faq-icon {
      transition: transform .3s ease;
    }

    .mobile-menu-link {
      transition: background .2s ease, color .2s ease;
    }

    .mobile-menu-link:hover {
      background: #f8fafc;
    }

    .site-footer a {
      transition: color .2s ease;
    }