:root {
      --primary: #2563eb;
      --primary-dark: #1d4ed8;
      --primary-light: #eff6ff;
      --accent: #f59e0b;
      --accent-hover: #d97706;
      --text-main: #0f172a;
      --text-muted: #475569;
      --text-light: #64748b;
      --bg-main: #f8fafc;
      --bg-card: #ffffff;
      --bg-alt: #f1f5f9;
      --border-color: #e2e8f0;
      --border-focus: #93c5fd;
      --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
      --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
      --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
      --radius: 12px;
      --transition: all 0.25s ease;
    }

    * {
      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", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-main);
      color: var(--text-main);
      line-height: 1.6;
      overflow-x: hidden;
    }

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

    ul, ol {
      list-style: none;
    }

    .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-color: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(8px);
      border-bottom: 1px solid var(--border-color);
    }

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

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

    .logo-box {
      max-width: 140px;
      display: flex;
      align-items: center;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
    }

    .nav-links li a {
      display: block;
      padding: 8px 14px;
      font-size: 0.938rem;
      font-weight: 500;
      color: var(--text-muted);
      border-radius: 6px;
    }

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

    .nav-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 20px;
      font-size: 0.938rem;
      font-weight: 600;
      border-radius: 8px;
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition);
      text-align: center;
    }

    .btn-primary {
      background-color: var(--primary);
      color: #ffffff;
      box-shadow: 0 2px 4px rgba(37, 99, 235, 0.2);
    }

    .btn-primary:hover {
      background-color: var(--primary-dark);
      transform: translateY(-1px);
      box-shadow: 0 4px 8px rgba(37, 99, 235, 0.3);
    }

    .btn-accent {
      background-color: var(--accent);
      color: #ffffff;
    }

    .btn-accent:hover {
      background-color: var(--accent-hover);
      transform: translateY(-1px);
    }

    .btn-outline {
      border-color: var(--border-color);
      background-color: #ffffff;
      color: var(--text-main);
    }

    .btn-outline:hover {
      border-color: var(--primary);
      color: var(--primary);
      background-color: var(--primary-light);
    }

    .mobile-menu-btn {
      display: none;
      background: none;
      border: 1px solid var(--border-color);
      padding: 8px 12px;
      border-radius: 6px;
      cursor: pointer;
      font-size: 1.25rem;
      color: var(--text-main);
    }

    /* Hero Section (No Images Allowed) */
    .hero-section {
      background: linear-gradient(135deg, #ffffff 0%, #eff6ff 50%, #f1f5f9 100%);
      padding: 64px 0 72px;
      position: relative;
      border-bottom: 1px solid var(--border-color);
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 40px;
      align-items: center;
    }

    .hero-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 14px;
      background-color: #dbeafe;
      color: var(--primary-dark);
      border-radius: 50px;
      font-size: 0.875rem;
      font-weight: 600;
      margin-bottom: 20px;
    }

    .hero-title {
      font-size: 2.5rem;
      line-height: 1.25;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

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

    .hero-desc {
      font-size: 1.125rem;
      color: var(--text-muted);
      margin-bottom: 32px;
      line-height: 1.7;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 40px;
    }

    .hero-btn-main {
      font-size: 1.05rem;
      padding: 14px 28px;
    }

    .hero-data-board {
      background-color: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      box-shadow: var(--shadow-lg);
    }

    .board-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 20px;
      padding-bottom: 12px;
      border-bottom: 1px solid var(--border-color);
    }

    .board-title {
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-main);
    }

    .board-badge {
      font-size: 0.75rem;
      padding: 3px 8px;
      background-color: #ecfdf5;
      color: #059669;
      border-radius: 4px;
      font-weight: 600;
    }

    .data-grid-inner {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 16px;
    }

    .data-item {
      background-color: var(--bg-alt);
      padding: 16px;
      border-radius: 8px;
      border-left: 4px solid var(--primary);
    }

    .data-num {
      font-size: 1.5rem;
      font-weight: 800;
      color: var(--text-main);
      display: block;
    }

    .data-label {
      font-size: 0.813rem;
      color: var(--text-muted);
    }

    .model-pills {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: 16px;
    }

    .model-pill {
      font-size: 0.75rem;
      padding: 4px 10px;
      background-color: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 20px;
      color: var(--text-muted);
    }

    /* Section Global */
    section {
      padding: 72px 0;
    }

    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 48px;
    }

    .section-tag {
      font-size: 0.813rem;
      font-weight: 700;
      color: var(--primary);
      text-transform: uppercase;
      letter-spacing: 1px;
      margin-bottom: 8px;
      display: inline-block;
    }

    .section-title {
      font-size: 2rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 16px;
    }

    .section-subtitle {
      font-size: 1rem;
      color: var(--text-muted);
    }

    /* Card Grids */
    .card-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 24px;
    }

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

    .card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
      border-color: var(--border-focus);
    }

    .card-icon {
      width: 48px;
      height: 48px;
      border-radius: 10px;
      background-color: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
      font-size: 1.25rem;
      margin-bottom: 20px;
    }

    .card h3 {
      font-size: 1.25rem;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--text-main);
    }

    .card p {
      font-size: 0.938rem;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
    }

    /* Evaluation Section */
    .eval-box {
      background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 36px;
      box-shadow: var(--shadow-md);
      margin-bottom: 32px;
    }

    .eval-score-header {
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      align-items: center;
      padding-bottom: 24px;
      margin-bottom: 24px;
      border-bottom: 2px dashed var(--border-color);
      gap: 20px;
    }

    .score-badge {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .score-value {
      font-size: 3rem;
      font-weight: 900;
      color: var(--primary);
      line-height: 1;
    }

    .score-detail {
      font-size: 0.875rem;
      color: var(--text-muted);
    }

    .star-rate {
      color: var(--accent);
      font-size: 1.25rem;
    }

    .table-container {
      width: 100%;
      overflow-x: auto;
    }

    .table-custom {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 0.938rem;
    }

    .table-custom th {
      background-color: var(--bg-alt);
      color: var(--text-main);
      padding: 14px 16px;
      font-weight: 700;
      border-bottom: 2px solid var(--border-color);
    }

    .table-custom td {
      padding: 14px 16px;
      border-bottom: 1px solid var(--border-color);
      color: var(--text-muted);
    }

    .table-custom tr:hover td {
      background-color: #f8fafc;
    }

    .highlight-cell {
      font-weight: 700;
      color: var(--primary);
      background-color: var(--primary-light);
    }

    /* Gallery & Media Area */
    .media-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
      gap: 20px;
    }

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

    .media-card .img-wrap {
      width: 100%;
      aspect-ratio: 16 / 9;
      overflow: hidden;
      background-color: var(--bg-alt);
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .media-card.square .img-wrap {
      aspect-ratio: 1 / 1;
    }

    .media-card img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
      transition: var(--transition);
    }

    .media-card:hover img {
      transform: scale(1.03);
    }

    .media-info {
      padding: 16px 20px;
    }

    .media-info h4 {
      font-size: 1.05rem;
      color: var(--text-main);
      margin-bottom: 6px;
    }

    .media-info p {
      font-size: 0.875rem;
      color: var(--text-muted);
    }

    /* Process Flow */
    .flow-steps {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 20px;
      position: relative;
    }

    .step-box {
      background-color: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      text-align: center;
      position: relative;
    }

    .step-idx {
      display: inline-block;
      width: 36px;
      height: 36px;
      line-height: 36px;
      background-color: var(--primary);
      color: #ffffff;
      border-radius: 50%;
      font-weight: 700;
      margin-bottom: 16px;
    }

    /* Reviews */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
      gap: 24px;
    }

    .review-card {
      background-color: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      box-shadow: var(--shadow-sm);
    }

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

    .reviewer-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background-color: #cbd5e1;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
      color: #ffffff;
    }

    .reviewer-name {
      font-weight: 700;
      font-size: 0.95rem;
      color: var(--text-main);
    }

    .reviewer-role {
      font-size: 0.813rem;
      color: var(--text-light);
    }

    .review-text {
      font-size: 0.938rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* FAQ */
    .faq-list {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .faq-item {
      background-color: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      overflow: hidden;
    }

    .faq-trigger {
      width: 100%;
      text-align: left;
      padding: 18px 24px;
      background: none;
      border: none;
      font-size: 1rem;
      font-weight: 600;
      color: var(--text-main);
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
    }

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

    .faq-icon {
      font-size: 1.25rem;
      transition: transform 0.2s ease;
    }

    .faq-content {
      display: none;
      padding: 0 24px 20px;
      font-size: 0.938rem;
      color: var(--text-muted);
      line-height: 1.6;
      border-top: 1px solid #f1f5f9;
      padding-top: 16px;
    }

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

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

    /* Form Section */
    .form-wrapper {
      max-width: 720px;
      margin: 0 auto;
      background-color: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 36px;
      box-shadow: var(--shadow-md);
    }

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

    .form-group label {
      display: block;
      font-size: 0.875rem;
      font-weight: 600;
      margin-bottom: 8px;
      color: var(--text-main);
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      font-size: 0.938rem;
      color: var(--text-main);
      background-color: #ffffff;
      outline: none;
      transition: var(--transition);
    }

    .form-control:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
    }

    textarea.form-control {
      resize: vertical;
      min-height: 120px;
    }

    /* Contact & Footprint */
    .contact-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 24px;
      margin-bottom: 40px;
    }

    .contact-box {
      background-color: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 28px;
      text-align: center;
    }

    .qr-container {
      max-width: 140px;
      margin: 16px auto;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      padding: 8px;
      background-color: #ffffff;
    }

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

    /* Articles & Links */
    .article-list-wrap {
      background-color: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      margin-bottom: 32px;
    }

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

    .article-links a {
      font-size: 0.875rem;
      color: var(--primary);
      background-color: var(--primary-light);
      padding: 6px 12px;
      border-radius: 6px;
    }

    .article-links a:hover {
      text-decoration: underline;
    }

    /* Footer */
    .site-footer {
      background-color: #ffffff;
      border-top: 1px solid var(--border-color);
      padding: 48px 0 24px;
      color: var(--text-muted);
      font-size: 0.875rem;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr repeat(3, 1fr);
      gap: 32px;
      margin-bottom: 36px;
    }

    .footer-title {
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 16px;
    }

    .footer-links li {
      margin-bottom: 8px;
    }

    .footer-links a:hover {
      color: var(--primary);
    }

    .friendly-links-wrap {
      border-top: 1px solid var(--border-color);
      padding: 20px 0;
      margin-bottom: 20px;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 16px;
      font-size: 0.813rem;
    }

    .friendly-links-wrap a {
      color: var(--text-muted);
    }

    .friendly-links-wrap a:hover {
      color: var(--primary);
    }

    .footer-bottom {
      border-top: 1px solid #f1f5f9;
      padding-top: 20px;
      text-align: center;
      color: var(--text-light);
    }

    /* Float Service & Back to Top */
    .float-panel {
      position: fixed;
      right: 20px;
      bottom: 24px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 48px;
      height: 48px;
      background-color: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: var(--shadow-md);
      cursor: pointer;
      color: var(--primary);
      font-size: 1.25rem;
      transition: var(--transition);
      position: relative;
    }

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

    .float-btn .qr-hover-box {
      display: none;
      position: absolute;
      right: 56px;
      bottom: 0;
      background: #ffffff;
      padding: 12px;
      border-radius: 8px;
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--border-color);
      width: 140px;
      text-align: center;
    }

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

    /* Responsive */
    @media (max-width: 992px) {
      .hero-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .nav-links {
        display: none;
      }
      .nav-links.active {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background-color: #ffffff;
        border-bottom: 1px solid var(--border-color);
        padding: 16px 20px;
        gap: 8px;
        box-shadow: var(--shadow-md);
      }
      .mobile-menu-btn {
        display: inline-block;
      }
    }

    @media (max-width: 640px) {
      .hero-title {
        font-size: 1.875rem;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .hero-actions {
        flex-direction: column;
      }
      .btn {
        width: 100%;
      }
    }