:root {
      --primary-red: #d32f2f;
      --deep-red: #9a0007;
      --vibrant-red: #e53935;
      --light-red-bg: #fff5f5;
      --accent-warm: #ff6f61;
      --text-main: #1f2329;
      --text-muted: #57606a;
      --text-sub: #8c959f;
      --border-color: #ffd2d2;
      --card-bg: #ffffff;
      --page-bg: #fafbfc;
      --shadow-sm: 0 4px 12px rgba(211, 47, 47, 0.08);
      --shadow-hover: 0 12px 28px rgba(211, 47, 47, 0.16);
      --transition: all 0.28s ease;
      --container-width: 1200px;
    }

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

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--page-bg);
      color: var(--text-main);
      line-height: 1.65;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

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

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

    .container {
      width: 100%;
      max-width: var(--container-width);
      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: 0 2px 10px rgba(0, 0, 0, 0.03);
    }

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

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

    .brand-logo-area .ai-page-logo {
      height: 40px;
      width: auto;
    }

    .brand-title-wrap {
      display: flex;
      flex-direction: column;
    }

    .brand-name {
      font-size: 20px;
      font-weight: 800;
      color: var(--primary-red);
      letter-spacing: -0.5px;
    }

    .brand-tagline {
      font-size: 11px;
      color: var(--text-muted);
    }

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

    .nav-links li a {
      font-size: 14px;
      font-weight: 500;
      color: var(--text-main);
      padding: 8px 14px;
      display: inline-block;
      position: relative;
    }

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

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

    .btn-red {
      background: linear-gradient(135deg, var(--vibrant-red), var(--deep-red));
      color: #ffffff !important;
      padding: 10px 22px;
      border-radius: 6px;
      font-size: 14px;
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border: 1px solid transparent;
      box-shadow: 0 4px 14px rgba(211, 47, 47, 0.28);
      cursor: pointer;
      transition: var(--transition);
    }

    .btn-red:hover {
      background: linear-gradient(135deg, var(--deep-red), #7b0005);
      transform: translateY(-2px);
      box-shadow: 0 6px 18px rgba(211, 47, 47, 0.4);
    }

    .btn-outline-red {
      background: #ffffff;
      color: var(--primary-red) !important;
      padding: 9px 20px;
      border-radius: 6px;
      font-size: 14px;
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border: 1px solid var(--primary-red);
      cursor: pointer;
      transition: var(--transition);
    }

    .btn-outline-red:hover {
      background: var(--light-red-bg);
      transform: translateY(-2px);
    }

    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      color: var(--text-main);
      cursor: pointer;
    }

    .hero-section {
      background: radial-gradient(circle at 10% 20%, #fff0f0 0%, #fff9f9 50%, #fafbfc 100%);
      padding: 80px 0 60px;
      position: relative;
      border-bottom: 1px solid #fee2e2;
    }

    .hero-inner {
      text-align: center;
      max-width: 900px;
      margin: 0 auto;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      padding: 6px 16px;
      border-radius: 30px;
      background: #ffe6e6;
      color: var(--primary-red);
      font-size: 13px;
      font-weight: 600;
      margin-bottom: 24px;
      border: 1px solid rgba(211, 47, 47, 0.2);
    }

    .hero-title {
      font-size: 38px;
      font-weight: 900;
      line-height: 1.25;
      color: var(--text-main);
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

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

    .hero-desc {
      font-size: 17px;
      color: var(--text-muted);
      line-height: 1.8;
      margin-bottom: 36px;
      max-width: 780px;
      margin-left: auto;
      margin-right: auto;
    }

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

    .hero-btn-official {
      padding: 14px 34px;
      font-size: 16px;
      border-radius: 8px;
    }

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

    .stat-card {
      background: #ffffff;
      padding: 24px;
      border-radius: 10px;
      border: 1px solid #fed7d7;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

    .stat-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: var(--primary-red);
    }

    .stat-num {
      font-size: 28px;
      font-weight: 800;
      color: var(--primary-red);
      margin-bottom: 6px;
      font-family: inherit;
    }

    .stat-label {
      font-size: 13px;
      color: var(--text-muted);
      font-weight: 500;
    }

    .section-wrap {
      padding: 80px 0;
      position: relative;
    }

    .section-wrap.alt-bg {
      background-color: #fffafa;
      border-top: 1px solid #fee2e2;
      border-bottom: 1px solid #fee2e2;
    }

    .section-header {
      text-align: center;
      margin-bottom: 50px;
      max-width: 760px;
      margin-left: auto;
      margin-right: auto;
    }

    .section-tag {
      font-size: 12px;
      font-weight: 700;
      text-transform: uppercase;
      color: var(--primary-red);
      letter-spacing: 1.5px;
      margin-bottom: 10px;
      display: block;
    }

    .section-heading {
      font-size: 30px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 14px;
    }

    .section-subtext {
      font-size: 15px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

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

    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 30px;
      align-items: center;
    }

    .feature-card {
      background: var(--card-bg);
      border: 1px solid #fee2e2;
      border-radius: 12px;
      padding: 28px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      height: 100%;
    }

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

    .feature-icon-badge {
      width: 48px;
      height: 48px;
      border-radius: 10px;
      background: var(--light-red-bg);
      color: var(--primary-red);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 18px;
      margin-bottom: 18px;
      border: 1px solid #ffd2d2;
    }

    .feature-card h3 {
      font-size: 18px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }

    .feature-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.65;
      flex-grow: 1;
    }

    .models-tags-container {
      background: #ffffff;
      border: 1px solid #fecaca;
      border-radius: 14px;
      padding: 30px;
      box-shadow: var(--shadow-sm);
    }

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

    .model-chip {
      background: #fff8f8;
      border: 1px solid #ffd4d4;
      color: #900000;
      font-size: 13px;
      font-weight: 600;
      padding: 7px 16px;
      border-radius: 20px;
      transition: var(--transition);
    }

    .model-chip:hover {
      background: var(--primary-red);
      color: #ffffff;
      border-color: var(--primary-red);
      transform: scale(1.04);
    }

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

    .process-step-box {
      background: #ffffff;
      border: 1px solid #ffd2d2;
      border-radius: 12px;
      padding: 24px;
      position: relative;
      box-shadow: var(--shadow-sm);
    }

    .step-badge {
      font-size: 12px;
      font-weight: 800;
      background: var(--primary-red);
      color: #ffffff;
      padding: 3px 10px;
      border-radius: 12px;
      display: inline-block;
      margin-bottom: 12px;
    }

    .process-step-box h4 {
      font-size: 17px;
      margin-bottom: 8px;
      color: var(--text-main);
    }

    .process-step-box p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    .media-card-showcase {
      background: #ffffff;
      border: 1px solid #fed7d7;
      border-radius: 12px;
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

    .media-card-showcase:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-hover);
    }

    .media-card-image-box {
      aspect-ratio: 16/9;
      width: 100%;
      overflow: hidden;
      background: #f7f7f7;
    }

    .media-card-image-box img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }

    .media-card-showcase:hover .media-card-image-box img {
      transform: scale(1.05);
    }

    .media-card-content {
      padding: 20px;
    }

    .media-card-content h4 {
      font-size: 16px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .media-card-content p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    .comparison-wrapper {
      background: #ffffff;
      border-radius: 14px;
      border: 1px solid #fed7d7;
      overflow-x: auto;
      box-shadow: var(--shadow-sm);
    }

    .comparison-score-bar {
      padding: 24px;
      background: linear-gradient(135deg, #fff2f2, #ffebe8);
      border-bottom: 1px solid #fecaca;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 16px;
    }

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

    .score-stars {
      color: #ff9800;
      font-size: 20px;
      letter-spacing: 2px;
    }

    .score-val {
      font-size: 32px;
      font-weight: 900;
      color: var(--primary-red);
    }

    .score-total {
      font-size: 14px;
      color: var(--text-muted);
    }

    .custom-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 680px;
    }

    .custom-table th,
    .custom-table td {
      padding: 16px 20px;
      border-bottom: 1px solid #f8d7da;
      font-size: 14px;
    }

    .custom-table th {
      background-color: #fff8f8;
      color: var(--deep-red);
      font-weight: 700;
    }

    .custom-table tr:last-child td {
      border-bottom: none;
    }

    .custom-table td.highlight-cell {
      font-weight: 700;
      color: var(--primary-red);
      background-color: #fffdfd;
    }

    .token-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .token-card {
      background: #ffffff;
      border: 1px solid #fed7d7;
      border-radius: 12px;
      padding: 24px;
      box-shadow: var(--shadow-sm);
      text-align: center;
      transition: var(--transition);
    }

    .token-card.featured-plan {
      border: 2px solid var(--primary-red);
      position: relative;
      transform: scale(1.02);
    }

    .token-card:hover {
      box-shadow: var(--shadow-hover);
    }

    .token-tier-badge {
      position: absolute;
      top: -12px;
      left: 50%;
      transform: translateX(-50%);
      background: var(--primary-red);
      color: #ffffff;
      padding: 3px 14px;
      border-radius: 20px;
      font-size: 12px;
      font-weight: 700;
    }

    .token-price {
      font-size: 30px;
      font-weight: 800;
      color: var(--primary-red);
      margin: 16px 0;
    }

    .token-price span {
      font-size: 14px;
      color: var(--text-muted);
      font-weight: normal;
    }

    .token-features-list {
      list-style: none;
      text-align: left;
      margin: 20px 0;
      font-size: 13px;
      color: var(--text-muted);
    }

    .token-features-list li {
      padding: 6px 0;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .token-features-list li::before {
      content: "✓";
      color: var(--primary-red);
      font-weight: bold;
    }

    .faq-accordion {
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .faq-item {
      background: #ffffff;
      border: 1px solid #ffd2d2;
      border-radius: 10px;
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

    .faq-question {
      padding: 18px 22px;
      font-size: 16px;
      font-weight: 700;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: #ffffff;
      user-select: none;
    }

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

    .faq-toggle-icon {
      font-size: 18px;
      transition: transform 0.3s ease;
      color: var(--primary-red);
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease, padding 0.35s ease;
      background-color: #fffafa;
      color: var(--text-muted);
      font-size: 14px;
      line-height: 1.7;
      padding: 0 22px;
    }

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

    .faq-item.active .faq-answer {
      max-height: 300px;
      padding: 16px 22px 20px;
      border-top: 1px solid #fee2e2;
    }

    .review-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .review-card {
      background: #ffffff;
      border: 1px solid #ffd8d8;
      border-radius: 12px;
      padding: 24px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .review-text {
      font-size: 14px;
      color: var(--text-main);
      line-height: 1.7;
      margin-bottom: 20px;
      font-style: italic;
    }

    .review-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #fff0f0;
      padding-top: 14px;
    }

    .avatar-placeholder {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary-red), var(--deep-red));
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 14px;
      flex-shrink: 0;
    }

    .author-info-box h5 {
      font-size: 15px;
      color: var(--text-main);
      font-weight: 700;
    }

    .author-info-box span {
      font-size: 12px;
      color: var(--text-sub);
    }

    .form-card {
      background: #ffffff;
      border: 1px solid #fecaca;
      border-radius: 14px;
      padding: 36px;
      box-shadow: var(--shadow-sm);
    }

    .form-group {
      margin-bottom: 18px;
    }

    .form-group label {
      display: block;
      font-size: 14px;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 6px;
    }

    .form-control {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid #fed7d7;
      border-radius: 8px;
      font-size: 14px;
      outline: none;
      transition: var(--transition);
      background-color: #fffdfd;
      font-family: inherit;
    }

    .form-control:focus {
      border-color: var(--primary-red);
      box-shadow: 0 0 0 3px rgba(211, 47, 47, 0.12);
      background-color: #ffffff;
    }

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

    .contact-info-panel {
      display: flex;
      flex-direction: column;
      gap: 20px;
      justify-content: center;
    }

    .contact-meta-item {
      display: flex;
      align-items: flex-start;
      gap: 14px;
    }

    .contact-icon {
      width: 40px;
      height: 40px;
      border-radius: 8px;
      background: var(--light-red-bg);
      color: var(--primary-red);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
      flex-shrink: 0;
      border: 1px solid #ffd2d2;
    }

    .qr-container {
      background: #ffffff;
      padding: 16px;
      border: 1px solid #ffd2d2;
      border-radius: 10px;
      display: inline-block;
      max-width: 160px;
      box-shadow: var(--shadow-sm);
    }

    .articles-list {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 16px;
      margin-top: 20px;
    }

    .article-item-card {
      background: #ffffff;
      border: 1px solid #fed7d7;
      border-radius: 8px;
      padding: 16px;
      box-shadow: var(--shadow-sm);
      display: flex;
      align-items: center;
      justify-content: space-between;
      transition: var(--transition);
    }

    .article-item-card:hover {
      border-color: var(--primary-red);
      transform: translateX(4px);
    }

    .article-title-text {
      font-size: 14px;
      font-weight: 600;
      color: var(--text-main);
    }

    .article-link-btn {
      color: var(--primary-red);
      font-size: 13px;
      font-weight: 600;
    }

    .site-footer {
      background-color: #1a1a1a;
      color: #d1d5db;
      padding: 60px 0 30px;
      font-size: 14px;
    }

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

    .footer-col h5 {
      color: #ffffff;
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 18px;
      border-left: 3px solid var(--primary-red);
      padding-left: 10px;
    }

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

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

    .footer-col ul li a {
      color: #9ca3af;
    }

    .footer-col ul li a:hover {
      color: #ffffff;
    }

    .footer-friend-links {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 10px;
    }

    .footer-friend-links a {
      color: #9ca3af;
      background: #282828;
      padding: 4px 10px;
      border-radius: 4px;
      font-size: 12px;
      border: 1px solid #3d3d3d;
    }

    .footer-friend-links a:hover {
      color: #ffffff;
      border-color: var(--primary-red);
    }

    .footer-bottom-bar {
      border-top: 1px solid #2e2e2e;
      padding-top: 24px;
      text-align: center;
      color: #6b7280;
      font-size: 13px;
    }

    .floating-tools {
      position: fixed;
      right: 20px;
      bottom: 30px;
      display: flex;
      flex-direction: column;
      gap: 10px;
      z-index: 999;
    }

    .float-btn {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--primary-red);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
      cursor: pointer;
      border: none;
      transition: var(--transition);
      font-size: 18px;
    }

    .float-btn:hover {
      transform: translateY(-3px);
      background: var(--deep-red);
    }

    @media (max-width: 992px) {
      .grid-3, .grid-4, .hero-stats-grid, .token-grid, .review-grid, .process-timeline {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-2 {
        grid-template-columns: 1fr;
      }
      .footer-top-grid {
        grid-template-columns: 1fr 1fr;
      }
      .hero-title {
        font-size: 30px;
      }
      .mobile-menu-btn {
        display: block;
      }
      .nav-links {
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #ffffff;
        flex-direction: column;
        align-items: flex-start;
        padding: 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-sm);
        display: none;
      }
      .nav-links.show {
        display: flex;
      }
      .nav-links li {
        width: 100%;
      }
      .nav-links li a {
        width: 100%;
        padding: 10px 0;
      }
    }

    @media (max-width: 640px) {
      .grid-3, .grid-4, .hero-stats-grid, .token-grid, .review-grid, .process-timeline, .articles-list {
        grid-template-columns: 1fr;
      }
      .footer-top-grid {
        grid-template-columns: 1fr;
      }
      .hero-title {
        font-size: 24px;
      }
      .hero-actions {
        flex-direction: column;
        width: 100%;
      }
      .hero-actions a {
        width: 100%;
      }
      .nav-cta-group {
        display: none;
      }
    }