:root {
      --primary: #0052d9;
      --primary-dark: #003cab;
      --primary-light: #2b70f0;
      --primary-soft: #ebf2ff;
      --accent: #00c48c;
      --accent-warm: #ff8800;
      --text-main: #1f2d3d;
      --text-muted: #5c6b7d;
      --text-light: #8c9ba5;
      --bg-page: #f4f7fc;
      --bg-card: #ffffff;
      --border-color: #e2e8f0;
      --border-hover: #b8cbe8;
      --shadow-sm: 0 2px 8px rgba(0, 82, 217, 0.04);
      --shadow-md: 0 8px 24px rgba(0, 82, 217, 0.08);
      --shadow-lg: 0 16px 36px rgba(0, 82, 217, 0.12);
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 18px;
    }

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

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

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
      background-color: var(--bg-page);
      color: var(--text-main);
      line-height: 1.6;
      overflow-x: hidden;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: all 0.25s ease;
    }

    .container {
      width: 100%;
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

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

    .brand-wrap {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .brand-wrap img {
      max-height: 40px;
      width: auto;
      display: block;
    }

    .brand-wrap .brand-text {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--primary);
      letter-spacing: 0.5px;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
    }

    .nav-links li a {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-main);
      padding: 8px 12px;
      border-radius: var(--radius-sm);
    }

    .nav-links li a:hover {
      color: var(--primary);
      background-color: var(--primary-soft);
    }

    .header-action {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 0.95rem;
      font-weight: 600;
      padding: 10px 22px;
      border-radius: var(--radius-sm);
      border: 1px solid transparent;
      cursor: pointer;
      transition: all 0.25s ease;
      white-space: nowrap;
      text-align: center;
    }

    .btn-primary {
      background-color: var(--primary);
      color: #ffffff;
      box-shadow: 0 4px 14px rgba(0, 82, 217, 0.25);
    }

    .btn-primary:hover {
      background-color: var(--primary-dark);
      box-shadow: 0 6px 18px rgba(0, 82, 217, 0.35);
      color: #ffffff;
      transform: translateY(-1px);
    }

    .btn-secondary {
      background-color: var(--primary-soft);
      color: var(--primary);
      border-color: #d0e0fc;
    }

    .btn-secondary:hover {
      background-color: #dce9ff;
      color: var(--primary-dark);
    }

    .btn-lg {
      padding: 14px 32px;
      font-size: 1.05rem;
      border-radius: var(--radius-md);
    }

    .btn-accent {
      background-color: var(--accent-warm);
      color: #ffffff;
      box-shadow: 0 4px 14px rgba(255, 136, 0, 0.25);
    }

    .btn-accent:hover {
      background-color: #e67a00;
      color: #ffffff;
    }

    .mobile-menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      color: var(--text-main);
      cursor: pointer;
      padding: 4px;
    }

    .hero-section {
      position: relative;
      background: linear-gradient(135deg, #0a3d91 0%, #0052d9 50%, #1e6bf2 100%);
      color: #ffffff;
      padding: 80px 0 100px;
      overflow: hidden;
    }

    .hero-bg-elem {
      position: absolute;
      border-radius: 50%;
      filter: blur(80px);
      pointer-events: none;
    }

    .hero-bg-1 {
      width: 400px;
      height: 400px;
      background: rgba(0, 196, 140, 0.2);
      top: -100px;
      right: -50px;
    }

    .hero-bg-2 {
      width: 500px;
      height: 500px;
      background: rgba(255, 136, 0, 0.15);
      bottom: -150px;
      left: -100px;
    }

    .hero-container {
      position: relative;
      z-index: 2;
      text-align: center;
    }

    .hero-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(255, 255, 255, 0.15);
      border: 1px solid rgba(255, 255, 255, 0.25);
      padding: 6px 18px;
      border-radius: 30px;
      font-size: 0.88rem;
      font-weight: 500;
      margin-bottom: 24px;
      backdrop-filter: blur(8px);
    }

    .hero-title {
      font-size: 2.5rem;
      font-weight: 800;
      line-height: 1.3;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
      color: #ffffff;
    }

    .hero-desc {
      font-size: 1.15rem;
      max-width: 820px;
      margin: 0 auto 36px;
      color: rgba(255, 255, 255, 0.9);
      line-height: 1.7;
    }

    .hero-cta {
      display: flex;
      justify-content: center;
      gap: 18px;
      flex-wrap: wrap;
      margin-bottom: 50px;
    }

    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 20px;
    }

    .stat-card {
      background: rgba(255, 255, 255, 0.1);
      border: 1px solid rgba(255, 255, 255, 0.2);
      border-radius: var(--radius-md);
      padding: 24px 16px;
      backdrop-filter: blur(12px);
      text-align: center;
      transition: transform 0.3s ease;
    }

    .stat-card:hover {
      transform: translateY(-4px);
      background: rgba(255, 255, 255, 0.16);
    }

    .stat-num {
      font-size: 2rem;
      font-weight: 800;
      color: #ffffff;
      margin-bottom: 4px;
    }

    .stat-label {
      font-size: 0.88rem;
      color: rgba(255, 255, 255, 0.8);
    }

    .section-wrap {
      padding: 80px 0;
      border-bottom: 1px solid #ebedf0;
    }

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

    .section-header {
      text-align: center;
      max-width: 780px;
      margin: 0 auto 50px;
    }

    .section-badge {
      display: inline-block;
      font-size: 0.8rem;
      font-weight: 700;
      color: var(--primary);
      background: var(--primary-soft);
      padding: 4px 14px;
      border-radius: 20px;
      margin-bottom: 12px;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }

    .section-title {
      font-size: 2rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 14px;
    }

    .section-desc {
      font-size: 1rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    .card-grid {
      display: grid;
      gap: 24px;
    }

    .grid-3 {
      grid-template-columns: repeat(3, 1fr);
    }

    .grid-4 {
      grid-template-columns: repeat(4, 1fr);
    }

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

    .feature-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px 24px;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
    }

    .feature-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-md);
      border-color: var(--border-hover);
    }

    .feature-icon-box {
      width: 48px;
      height: 48px;
      border-radius: var(--radius-sm);
      background: var(--primary-soft);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      margin-bottom: 18px;
      font-weight: bold;
    }

    .feature-title {
      font-size: 1.2rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }

    .feature-text {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.65;
      flex-grow: 1;
    }

    .tag-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 30px;
    }

    .tag-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 8px 16px;
      border-radius: 30px;
      font-size: 0.88rem;
      color: var(--text-main);
      font-weight: 500;
      transition: all 0.2s ease;
    }

    .tag-item:hover {
      border-color: var(--primary);
      color: var(--primary);
      background-color: var(--primary-soft);
    }

    .scene-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
      gap: 20px;
    }

    .scene-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 22px;
      transition: all 0.25s ease;
      border-left: 4px solid var(--primary);
    }

    .scene-card:hover {
      box-shadow: var(--shadow-md);
      transform: translateX(4px);
    }

    .scene-card h3 {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 8px;
      color: var(--text-main);
    }

    .scene-card p {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    .table-container {
      width: 100%;
      overflow-x: auto;
      background: var(--bg-card);
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .comparison-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 0.92rem;
    }

    .comparison-table th,
    .comparison-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
    }

    .comparison-table th {
      background-color: #f8fafd;
      font-weight: 700;
      color: var(--text-main);
    }

    .comparison-table tr:hover td {
      background-color: #fbfdff;
    }

    .table-badge-best {
      color: var(--primary);
      font-weight: 700;
      background: var(--primary-soft);
      padding: 4px 10px;
      border-radius: 4px;
      display: inline-block;
    }

    .score-banner {
      background: linear-gradient(90deg, #0052d9 0%, #1e6bf2 100%);
      color: #ffffff;
      border-radius: var(--radius-md);
      padding: 24px 30px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 24px;
      flex-wrap: wrap;
      gap: 16px;
    }

    .score-val {
      font-size: 2.2rem;
      font-weight: 800;
      color: #ffd15b;
      margin-right: 12px;
    }

    .process-timeline {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }

    .process-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      position: relative;
    }

    .process-step {
      font-size: 1.5rem;
      font-weight: 800;
      color: var(--primary-light);
      margin-bottom: 12px;
      display: block;
    }

    .process-card h3 {
      font-size: 1.1rem;
      margin-bottom: 8px;
    }

    .process-card p {
      font-size: 0.88rem;
      color: var(--text-muted);
    }

    .media-card {
      background: var(--bg-card);
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }

    .media-img-wrap {
      width: 100%;
      height: 200px;
      overflow: hidden;
      background-color: #f0f2f5;
    }

    .media-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
      transition: transform 0.4s ease;
    }

    .media-card:hover .media-img-wrap img {
      transform: scale(1.04);
    }

    .media-content {
      padding: 20px;
    }

    .media-content h3 {
      font-size: 1.15rem;
      margin-bottom: 8px;
    }

    .media-content p {
      font-size: 0.9rem;
      color: var(--text-muted);
    }

    .faq-accordion {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: border-color 0.25s ease;
    }

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

    .faq-header {
      width: 100%;
      text-align: left;
      padding: 18px 24px;
      background: none;
      border: none;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 1.05rem;
      font-weight: 600;
      color: var(--text-main);
      cursor: pointer;
    }

    .faq-icon {
      font-size: 1.2rem;
      color: var(--primary);
      transition: transform 0.3s ease;
    }

    .faq-body {
      padding: 0 24px 18px;
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.7;
      display: none;
      border-top: 1px solid #f4f6f8;
      padding-top: 14px;
    }

    .faq-item.active .faq-body {
      display: block;
    }

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

    .testimonial-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      display: flex;
      flex-direction: column;
      box-shadow: var(--shadow-sm);
    }

    .testimonial-header {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 14px;
    }

    .user-avatar-text {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--primary-soft);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1.1rem;
    }

    .user-meta h4 {
      font-size: 1rem;
      color: var(--text-main);
    }

    .user-meta span {
      font-size: 0.8rem;
      color: var(--text-light);
    }

    .testimonial-text {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.65;
      font-style: italic;
    }

    .form-box {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 36px;
      box-shadow: var(--shadow-md);
      max-width: 760px;
      margin: 0 auto;
    }

    .form-group {
      margin-bottom: 20px;
    }

    .form-label {
      display: block;
      font-size: 0.92rem;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.95rem;
      color: var(--text-main);
      background-color: #fff;
      outline: none;
      transition: border-color 0.25s ease;
      font-family: inherit;
    }

    .form-control:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(0, 82, 217, 0.1);
    }

    .form-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 18px;
    }

    textarea.form-control {
      resize: vertical;
      min-height: 100px;
    }

    .articles-block {
      background: #ffffff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      padding: 24px;
      margin-top: 30px;
    }

    .article-links {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 14px;
    }

    .article-pill {
      font-size: 0.88rem;
      padding: 6px 14px;
      background: var(--bg-page);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      color: var(--text-main);
    }

    .article-pill:hover {
      border-color: var(--primary);
      color: var(--primary);
      background: var(--primary-soft);
    }

    .site-footer {
      background: #111827;
      color: #9ca3af;
      padding: 60px 0 30px;
      font-size: 0.9rem;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 36px;
      margin-bottom: 40px;
    }

    .footer-col h4 {
      color: #ffffff;
      font-size: 1rem;
      font-weight: 700;
      margin-bottom: 18px;
    }

    .footer-list {
      list-style: none;
    }

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

    .footer-list a {
      color: #9ca3af;
    }

    .footer-list a:hover {
      color: #ffffff;
    }

    .contact-item {
      display: flex;
      align-items: center;
      gap: 8px;
      margin-bottom: 10px;
      color: #d1d5db;
    }

    .qr-container {
      display: flex;
      align-items: center;
      gap: 14px;
      margin-top: 14px;
    }

    .qr-box {
      width: 90px;
      height: 90px;
      background: #fff;
      padding: 4px;
      border-radius: var(--radius-sm);
    }

    .qr-box img {
      width: 100%;
      height: 100%;
      display: block;
    }

    .qr-info {
      font-size: 0.82rem;
      line-height: 1.5;
    }

    .friend-links-area {
      border-top: 1px solid #1f2937;
      padding-top: 24px;
      margin-bottom: 24px;
    }

    .friend-links-list {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      margin-top: 10px;
    }

    .friend-links-list a {
      color: #9ca3af;
      font-size: 0.85rem;
    }

    .friend-links-list a:hover {
      color: #3b82f6;
    }

    .footer-bottom {
      border-top: 1px solid #1f2937;
      padding-top: 20px;
      text-align: center;
      font-size: 0.82rem;
      color: #6b7280;
    }

    .floating-kefu {
      position: fixed;
      right: 20px;
      bottom: 80px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: var(--primary);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
      cursor: pointer;
      position: relative;
      transition: transform 0.25s ease;
      font-size: 0.85rem;
      font-weight: 700;
    }

    .float-btn:hover {
      transform: scale(1.08);
      background: var(--primary-dark);
    }

    .float-qr-pop {
      position: absolute;
      right: 60px;
      bottom: 0;
      background: #ffffff;
      padding: 12px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--border-color);
      width: 140px;
      text-align: center;
      display: none;
    }

    .float-qr-pop img {
      width: 100%;
      height: auto;
      display: block;
      margin-bottom: 6px;
    }

    .float-qr-pop p {
      font-size: 0.75rem;
      color: var(--text-main);
      font-weight: 600;
    }

    .float-btn:hover .float-qr-pop {
      display: block;
    }

    .scroll-top-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #ffffff;
      color: var(--text-main);
      border: 1px solid var(--border-color);
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
      cursor: pointer;
      transition: all 0.25s ease;
    }

    .scroll-top-btn:hover {
      background: var(--primary);
      color: #ffffff;
      border-color: var(--primary);
    }

    @media (max-width: 992px) {
      .grid-4, .grid-3 {
        grid-template-columns: repeat(2, 1fr);
      }
      .process-timeline {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .hero-stats-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .header-inner {
        height: 64px;
      }
      .mobile-menu-toggle {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        width: 100%;
        background: #ffffff;
        flex-direction: column;
        padding: 16px 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
      }
      .nav-links.active {
        display: flex;
      }
      .nav-links li {
        width: 100%;
      }
      .nav-links li a {
        display: block;
        padding: 10px 0;
      }
      .header-action {
        display: none;
      }
      .hero-title {
        font-size: 1.85rem;
      }
      .hero-desc {
        font-size: 1rem;
      }
      .grid-4, .grid-3, .grid-2 {
        grid-template-columns: 1fr;
      }
      .process-timeline {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .form-row {
        grid-template-columns: 1fr;
      }
      .score-banner {
        flex-direction: column;
        align-items: flex-start;
      }
      .floating-kefu {
        right: 12px;
        bottom: 60px;
      }
    }