:root {
      --primary-red: #d32f2f;
      --primary-red-hover: #b71c1c;
      --accent-red: #e53935;
      --light-red-bg: #fff5f5;
      --card-red-border: #fed7d7;
      --gold-accent: #f59e0b;
      --text-dark: #1e293b;
      --text-muted: #475569;
      --text-light: #64748b;
      --bg-page: #fbfbfd;
      --bg-card: #ffffff;
      --border-color: #f1f5f9;
      --shadow-sm: 0 2px 8px rgba(211, 47, 47, 0.06);
      --shadow-md: 0 8px 24px rgba(211, 47, 47, 0.08);
      --shadow-lg: 0 14px 36px rgba(211, 47, 47, 0.12);
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 16px;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-page);
      color: var(--text-dark);
      line-height: 1.6;
    }
    body {
      background: radial-gradient(circle at 50% 0%, #ffebee 0%, #fbfbfd 35%, #fff9f9 100%);
      color: var(--text-dark);
      overflow-x: hidden;
    }
    a {
      color: inherit;
      text-decoration: none;
      transition: all 0.25s ease;
    }
    ul, ol {
      list-style: none;
    }
    .container {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 24px;
      font-size: 15px;
      font-weight: 600;
      border-radius: var(--radius-md);
      cursor: pointer;
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      border: 1px solid transparent;
      white-space: nowrap;
    }
    .btn-primary {
      background: linear-gradient(135deg, var(--accent-red), var(--primary-red));
      color: #ffffff;
      box-shadow: 0 4px 14px rgba(211, 47, 47, 0.35);
    }
    .btn-primary:hover {
      background: linear-gradient(135deg, var(--primary-red), var(--primary-red-hover));
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(211, 47, 47, 0.45);
      color: #ffffff;
    }
    .btn-outline {
      background-color: #ffffff;
      border-color: var(--card-red-border);
      color: var(--primary-red);
    }
    .btn-outline:hover {
      background-color: var(--light-red-bg);
      border-color: var(--primary-red);
      transform: translateY(-2px);
    }
    .btn-large {
      padding: 14px 34px;
      font-size: 17px;
    }
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid rgba(229, 57, 53, 0.12);
      box-shadow: 0 2px 10px rgba(0,0,0,0.03);
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 20px;
      font-weight: 700;
      color: var(--primary-red);
    }
    .brand-logo img.ai-page-logo {
      height: 38px;
      width: auto;
      object-fit: contain;
    }
    .nav-links {
      display: flex;
      gap: 0;
      align-items: center;
    }
    .nav-links li a {
      padding: 8px 12px;
      font-size: 14px;
      font-weight: 500;
      color: var(--text-dark);
      border-radius: var(--radius-sm);
    }
    .nav-links li a:hover {
      color: var(--primary-red);
      background-color: var(--light-red-bg);
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .mobile-menu-btn {
      display: none;
      background: none;
      border: 1px solid #e2e8f0;
      padding: 6px 10px;
      border-radius: var(--radius-sm);
      cursor: pointer;
      font-size: 18px;
    }
    .section-padding {
      padding: 70px 0;
    }
    .section-header {
      text-align: center;
      max-width: 800px;
      margin: 0 auto 48px;
    }
    .section-badge {
      display: inline-block;
      padding: 4px 14px;
      background-color: var(--light-red-bg);
      border: 1px solid var(--card-red-border);
      color: var(--primary-red);
      border-radius: 20px;
      font-size: 13px;
      font-weight: 600;
      margin-bottom: 12px;
      letter-spacing: 0.5px;
    }
    .section-title {
      font-size: 28px;
      font-weight: 700;
      color: var(--text-dark);
      margin-bottom: 14px;
      position: relative;
    }
    .section-desc {
      font-size: 15px;
      color: var(--text-muted);
      line-height: 1.7;
    }
    .hero-section {
      padding: 65px 0 50px;
      position: relative;
      text-align: center;
    }
    .hero-badge-wrap {
      margin-bottom: 20px;
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: linear-gradient(90deg, #ffebee, #fff5f5);
      border: 1px solid #ffcdd2;
      color: var(--primary-red);
      padding: 6px 18px;
      border-radius: 30px;
      font-size: 14px;
      font-weight: 600;
      box-shadow: var(--shadow-sm);
    }
    .hero-title {
      font-size: 36px;
      font-weight: 800;
      line-height: 1.25;
      color: var(--text-dark);
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }
    .hero-title-highlight {
      background: linear-gradient(120deg, #d32f2f, #ff1744);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-subtitle {
      font-size: 17px;
      color: var(--text-muted);
      max-width: 820px;
      margin: 0 auto 34px;
      line-height: 1.7;
    }
    .hero-buttons {
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 44px;
    }
    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 18px;
      max-width: 1060px;
      margin: 0 auto;
    }
    .stat-card {
      background: #ffffff;
      border: 1px solid var(--card-red-border);
      border-radius: var(--radius-md);
      padding: 22px 16px;
      box-shadow: var(--shadow-sm);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      position: relative;
      overflow: hidden;
    }
    .stat-card::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 3px;
      background: linear-gradient(90deg, var(--accent-red), var(--gold-accent));
    }
    .stat-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .stat-number {
      font-size: 28px;
      font-weight: 800;
      color: var(--primary-red);
      margin-bottom: 6px;
      font-family: Arial, sans-serif;
    }
    .stat-label {
      font-size: 13px;
      color: var(--text-muted);
      font-weight: 500;
    }
    .model-marquee-box {
      margin-top: 36px;
      padding: 16px 20px;
      background: #ffffff;
      border: 1px dashed #ffcdd2;
      border-radius: var(--radius-md);
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      justify-content: center;
      align-items: center;
    }
    .model-tag {
      font-size: 12px;
      background-color: var(--light-red-bg);
      color: var(--primary-red);
      padding: 4px 10px;
      border-radius: 4px;
      font-weight: 500;
      border: 1px solid #ffebee;
    }
    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 26px;
    }
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 22px;
    }
    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .feature-card {
      background: var(--bg-card);
      border: 1px solid #fee2e2;
      border-radius: var(--radius-lg);
      padding: 26px;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
      height: 100%;
    }
    .feature-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: #fca5a5;
    }
    .feature-icon-box {
      width: 46px;
      height: 46px;
      border-radius: 10px;
      background: linear-gradient(135deg, #ffebee, #ffcdd2);
      color: var(--primary-red);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      font-weight: bold;
      margin-bottom: 16px;
    }
    .feature-title {
      font-size: 17px;
      font-weight: 700;
      color: var(--text-dark);
      margin-bottom: 10px;
    }
    .feature-desc {
      font-size: 13.5px;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
    }
    .card-footer-link {
      margin-top: 14px;
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-size: 13px;
      color: var(--primary-red);
      font-weight: 600;
    }
    .about-box {
      background: #ffffff;
      border: 1px solid var(--card-red-border);
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: var(--shadow-sm);
    }
    .about-item-list {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 18px;
      margin-top: 24px;
    }
    .about-sub-card {
      background: #fff8f8;
      border-left: 3px solid var(--primary-red);
      padding: 14px 16px;
      border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    }
    .about-sub-card h4 {
      font-size: 15px;
      color: var(--text-dark);
      margin-bottom: 4px;
    }
    .about-sub-card p {
      font-size: 13px;
      color: var(--text-muted);
    }
    .workflow-steps {
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      gap: 14px;
      position: relative;
    }
    .step-card {
      background: #ffffff;
      border: 1px solid #fee2e2;
      border-radius: var(--radius-md);
      padding: 20px 14px;
      text-align: center;
      position: relative;
    }
    .step-num {
      width: 32px;
      height: 32px;
      background: var(--primary-red);
      color: #fff;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
      font-size: 14px;
      margin: 0 auto 12px;
    }
    .step-card h4 {
      font-size: 15px;
      margin-bottom: 8px;
      color: var(--text-dark);
    }
    .step-card p {
      font-size: 12.5px;
      color: var(--text-muted);
      line-height: 1.5;
    }
    .comparison-card {
      background: #ffffff;
      border: 1px solid var(--card-red-border);
      border-radius: var(--radius-lg);
      padding: 30px;
      box-shadow: var(--shadow-md);
    }
    .rating-banner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      background: linear-gradient(135deg, #fff1f2, #ffe4e6);
      border: 1px solid #fecdd3;
      padding: 16px 24px;
      border-radius: var(--radius-md);
      margin-bottom: 24px;
      flex-wrap: wrap;
      gap: 12px;
    }
    .rating-score {
      font-size: 28px;
      font-weight: 800;
      color: var(--primary-red);
    }
    .stars {
      color: #f59e0b;
      font-size: 18px;
      margin-left: 6px;
    }
    .comp-table-wrap {
      overflow-x: auto;
    }
    .comp-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 14px;
    }
    .comp-table th, .comp-table td {
      padding: 14px 16px;
      border-bottom: 1px solid #f1f5f9;
    }
    .comp-table th {
      background-color: #fff5f5;
      color: var(--text-dark);
      font-weight: 700;
    }
    .comp-table td.highlight {
      color: var(--primary-red);
      font-weight: 600;
      background-color: #fffbfb;
    }
    .media-card {
      background: #ffffff;
      border: 1px solid #fee2e2;
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .media-card .img-container {
      width: 100%;
      overflow: hidden;
      background: #f8fafc;
      display: flex;
      align-items: center;
      justify-content: center;
    }
    .media-card img {
      width: 100%;
      height: auto;
      object-fit: cover;
      display: block;
      transition: transform 0.4s ease;
    }
    .media-card:hover img {
      transform: scale(1.03);
    }
    .media-content {
      padding: 16px;
    }
    .media-title {
      font-size: 15px;
      font-weight: 700;
      margin-bottom: 6px;
      color: var(--text-dark);
    }
    .media-desc {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.5;
    }
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }
    .review-card {
      background: #ffffff;
      border: 1px solid #fed7d7;
      border-radius: var(--radius-md);
      padding: 22px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .review-header {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 12px;
    }
    .review-avatar {
      width: 42px;
      height: 42px;
      background: linear-gradient(135deg, var(--accent-red), #ff8a80);
      color: #ffffff;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
      font-size: 16px;
    }
    .review-author-name {
      font-size: 15px;
      font-weight: 700;
      color: var(--text-dark);
    }
    .review-author-title {
      font-size: 12px;
      color: var(--text-muted);
    }
    .review-text {
      font-size: 13.5px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 12px;
      font-style: italic;
    }
    .review-rating {
      color: #f59e0b;
      font-size: 12px;
    }
    .faq-list {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .faq-item {
      background: #ffffff;
      border: 1px solid #fee2e2;
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: border-color 0.25s ease;
    }
    .faq-item.active {
      border-color: var(--primary-red);
    }
    .faq-question {
      padding: 16px 20px;
      font-size: 15px;
      font-weight: 600;
      color: var(--text-dark);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
      background: #fff;
    }
    .faq-question:hover {
      color: var(--primary-red);
    }
    .faq-icon {
      font-size: 18px;
      transition: transform 0.3s ease;
      color: var(--primary-red);
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      background: #fffafa;
      color: var(--text-muted);
      font-size: 14px;
      line-height: 1.6;
      padding: 0 20px;
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
      padding: 14px 20px 18px;
    }
    .contact-wrapper {
      background: #ffffff;
      border: 1px solid var(--card-red-border);
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: var(--shadow-md);
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 36px;
    }
    .contact-info-side {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }
    .contact-block {
      background: #fff8f8;
      border-radius: var(--radius-md);
      padding: 16px;
      border: 1px solid #ffebee;
    }
    .contact-block h4 {
      font-size: 14px;
      color: var(--primary-red);
      margin-bottom: 6px;
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .contact-block p {
      font-size: 13.5px;
      color: var(--text-dark);
      font-weight: 500;
    }
    .qr-container {
      text-align: center;
      background: #ffffff;
      padding: 14px;
      border-radius: var(--radius-md);
      border: 1px dashed #ffcdd2;
      display: inline-block;
      max-width: 170px;
    }
    .qr-container img {
      width: 140px;
      height: 140px;
      object-fit: contain;
      display: block;
      margin: 0 auto 6px;
    }
    .form-group {
      margin-bottom: 16px;
    }
    .form-label {
      display: block;
      font-size: 13.5px;
      font-weight: 600;
      color: var(--text-dark);
      margin-bottom: 6px;
    }
    .form-input, .form-select, .form-textarea {
      width: 100%;
      padding: 10px 14px;
      border: 1px solid #e2e8f0;
      border-radius: var(--radius-sm);
      font-size: 14px;
      outline: none;
      transition: all 0.25s ease;
      background: #ffffff;
      color: var(--text-dark);
      font-family: inherit;
    }
    .form-input:focus, .form-select:focus, .form-textarea:focus {
      border-color: var(--primary-red);
      box-shadow: 0 0 0 3px rgba(211, 47, 47, 0.12);
    }
    .form-textarea {
      resize: vertical;
      min-height: 90px;
    }
    .news-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 20px;
    }
    .news-card {
      background: #ffffff;
      border: 1px solid #fee2e2;
      border-radius: var(--radius-md);
      padding: 20px;
      transition: transform 0.25s ease;
    }
    .news-card:hover {
      transform: translateY(-3px);
      border-color: var(--primary-red);
    }
    .news-card-title {
      font-size: 16px;
      font-weight: 700;
      color: var(--text-dark);
      margin-bottom: 8px;
    }
    .news-links-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: 10px;
    }
    .news-link-item {
      font-size: 12px;
      background: #fff5f5;
      border: 1px solid #ffcdd2;
      color: var(--primary-red);
      padding: 4px 10px;
      border-radius: 4px;
    }
    .news-link-item:hover {
      background: var(--primary-red);
      color: #ffffff;
    }
    .site-footer {
      background: #111827;
      color: #9ca3af;
      padding: 50px 0 24px;
      font-size: 13.5px;
      border-top: 3px solid var(--primary-red);
    }
    .footer-top {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 30px;
      margin-bottom: 36px;
    }
    .footer-title {
      color: #f9fafb;
      font-size: 15px;
      font-weight: 700;
      margin-bottom: 14px;
    }
    .footer-links li {
      margin-bottom: 8px;
    }
    .footer-links a {
      color: #9ca3af;
    }
    .footer-links a:hover {
      color: #f87171;
    }
    .friend-links-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 8px;
    }
    .friend-links-wrap a {
      background: #1f2937;
      color: #d1d5db;
      padding: 4px 10px;
      border-radius: 4px;
      font-size: 12px;
      border: 1px solid #374151;
    }
    .friend-links-wrap a:hover {
      color: #ffffff;
      border-color: #ef4444;
      background: #b91c1c;
    }
    .footer-bottom {
      border-top: 1px solid #1f2937;
      padding-top: 20px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
    }
    .footer-bottom a {
      color: #d1d5db;
    }
    .footer-bottom a:hover {
      color: #f87171;
    }
    .float-panel {
      position: fixed;
      right: 18px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .float-btn {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: #ffffff;
      border: 1px solid #fee2e2;
      box-shadow: 0 4px 12px rgba(0,0,0,0.12);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      color: var(--primary-red);
      font-size: 18px;
      transition: all 0.25s ease;
    }
    .float-btn:hover {
      background: var(--primary-red);
      color: #ffffff;
      transform: scale(1.08);
    }
    @media (max-width: 992px) {
      .grid-4 { grid-template-columns: repeat(2, 1fr); }
      .grid-3 { grid-template-columns: repeat(2, 1fr); }
      .workflow-steps { grid-template-columns: repeat(3, 1fr); }
      .hero-stats-grid { grid-template-columns: repeat(2, 1fr); }
      .reviews-grid { grid-template-columns: repeat(2, 1fr); }
      .contact-wrapper { grid-template-columns: 1fr; }
      .footer-top { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 768px) {
      .nav-links { display: none; }
      .mobile-menu-btn { display: block; }
      .grid-2, .grid-3, .grid-4, .reviews-grid, .news-grid, .workflow-steps { grid-template-columns: 1fr; }
      .hero-stats-grid { grid-template-columns: repeat(2, 1fr); }
      .about-item-list { grid-template-columns: 1fr; }
      .footer-top { grid-template-columns: 1fr; }
      .hero-title { font-size: 26px; }
      .section-title { font-size: 23px; }
      .section-padding { padding: 48px 0; }
    }