/* Global Reset & Design Tokens (明艳撞色风) */
    :root {
      --primary: #4338ca;
      --primary-hover: #3730a3;
      --accent-orange: #ff5722;
      --accent-cyan: #06b6d4;
      --accent-green: #10b981;
      --accent-amber: #f59e0b;
      --accent-purple: #8b5cf6;
      --bg-light: #f8fafc;
      --bg-card: #ffffff;
      --text-main: #0f172a;
      --text-muted: #475569;
      --text-light: #64748b;
      --border-color: #e2e8f0;
      --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.05);
      --shadow-md: 0 10px 25px -5px rgba(67, 56, 202, 0.08), 0 8px 10px -6px rgba(15, 23, 42, 0.04);
      --shadow-hover: 0 20px 30px -10px rgba(67, 56, 202, 0.15), 0 10px 10px -5px rgba(255, 87, 34, 0.1);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --radius-full: 9999px;
      --container-max: 1240px;
    }

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

    html {
      scroll-behavior: smooth;
      font-size: 16px;
      background-color: var(--bg-light);
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      color: var(--text-main);
      background: #f8fafc;
      line-height: 1.6;
      overflow-x: hidden;
    }

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

    /* Container System */
    .container {
      width: 100%;
      max-width: var(--container-max);
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    /* Typography & Section Titles */
    .section-padding {
      padding: 80px 0;
    }

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

    .badge-tag {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 6px 16px;
      font-size: 0.85rem;
      font-weight: 700;
      letter-spacing: 0.5px;
      text-transform: uppercase;
      border-radius: var(--radius-full);
      background: #e0e7ff;
      color: var(--primary);
      margin-bottom: 12px;
      border: 1px solid #c7d2fe;
    }

    .badge-tag.orange {
      background: #ffedd5;
      color: var(--accent-orange);
      border-color: #fed7aa;
    }

    .badge-tag.cyan {
      background: #cffafe;
      color: #0891b2;
      border-color: #a5f3fc;
    }

    .badge-tag.green {
      background: #d1fae5;
      color: #059669;
      border-color: #a7f3d0;
    }

    .section-title {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 12px;
      line-height: 1.3;
    }

    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
      max-width: 680px;
      margin: 0 auto;
    }

    /* Buttons */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 13px 28px;
      font-size: 1rem;
      font-weight: 600;
      border-radius: var(--radius-md);
      cursor: pointer;
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      border: 2px solid transparent;
      text-align: center;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--primary) 0%, #6366f1 100%);
      color: #ffffff;
      box-shadow: 0 4px 14px rgba(67, 56, 202, 0.35);
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 22px rgba(67, 56, 202, 0.45);
      color: #ffffff;
    }

    .btn-contrast {
      background: linear-gradient(135deg, var(--accent-orange) 0%, #ea580c 100%);
      color: #ffffff;
      box-shadow: 0 4px 14px rgba(255, 87, 34, 0.35);
    }

    .btn-contrast:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 22px rgba(255, 87, 34, 0.45);
      color: #ffffff;
    }

    .btn-outline {
      background: #ffffff;
      color: var(--primary);
      border-color: #c7d2fe;
    }

    .btn-outline:hover {
      background: #eef2ff;
      border-color: var(--primary);
      transform: translateY(-2px);
    }

    /* Header & Navigation */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
    }

    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 76px;
    }

    .brand-group {
      display: flex;
      align-items: center;
      gap: 12px;
      flex-shrink: 0;
    }

    .brand-group .ai-page-logo {
      height: 38px;
      width: auto;
      display: block;
      object-fit: contain;
    }

    .brand-name {
      font-size: 1.35rem;
      font-weight: 800;
      background: linear-gradient(135deg, var(--primary), var(--accent-orange));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    /* Required: gap set to 0 */
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
    }

    .nav-links li a {
      display: inline-block;
      padding: 10px 14px;
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--text-main);
      border-radius: var(--radius-sm);
      transition: background 0.2s, color 0.2s;
    }

    .nav-links li a:hover,
    .nav-links li a.active {
      color: var(--primary);
      background: #eef2ff;
    }

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

    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      color: var(--text-main);
      cursor: pointer;
      padding: 6px;
    }

    /* Hero Section (Strictly NO Images) */
    .hero-section {
      position: relative;
      padding: 90px 0 80px;
      background: radial-gradient(circle at 80% 20%, #ffedd5 0%, transparent 40%),
                  radial-gradient(circle at 10% 80%, #e0e7ff 0%, transparent 45%),
                  linear-gradient(180deg, #ffffff 0%, #f1f5f9 100%);
      border-bottom: 1px solid var(--border-color);
      overflow: hidden;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 48px;
      align-items: center;
    }

    .hero-content h1 {
      font-size: 2.5rem;
      font-weight: 900;
      line-height: 1.25;
      color: var(--text-main);
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-content h1 .highlight {
      color: var(--primary);
      position: relative;
      display: inline-block;
    }

    .hero-content h1 .highlight-contrast {
      color: var(--accent-orange);
    }

    .hero-lead {
      font-size: 1.15rem;
      color: var(--text-muted);
      margin-bottom: 32px;
      line-height: 1.7;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 36px;
    }

    .hero-features-list {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      list-style: none;
    }

    .hero-feature-item {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 0.92rem;
      font-weight: 600;
      color: var(--text-muted);
      background: rgba(255, 255, 255, 0.8);
      padding: 6px 14px;
      border-radius: var(--radius-full);
      border: 1px solid var(--border-color);
    }

    .hero-feature-item .dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--accent-green);
    }

    /* Hero Tech Mockup Board (CSS only - no img) */
    .hero-tech-card {
      background: #ffffff;
      border-radius: var(--radius-lg);
      padding: 30px;
      border: 2px solid #e0e7ff;
      box-shadow: var(--shadow-md);
      position: relative;
    }

    .tech-card-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding-bottom: 16px;
      border-bottom: 1px solid var(--border-color);
      margin-bottom: 20px;
    }

    .tech-status {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 0.88rem;
      font-weight: 700;
      color: var(--accent-green);
    }

    .pulse-beacon {
      width: 10px;
      height: 10px;
      background: var(--accent-green);
      border-radius: 50%;
      box-shadow: 0 0 0 4px rgba(16, 185, 129, 0.2);
    }

    .tech-models-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-bottom: 24px;
    }

    .tech-chip {
      padding: 6px 12px;
      border-radius: var(--radius-sm);
      font-size: 0.82rem;
      font-weight: 700;
      background: #f1f5f9;
      color: var(--text-main);
      border: 1px solid #cbd5e1;
      transition: all 0.2s;
    }

    .tech-chip:hover {
      background: var(--primary);
      color: #ffffff;
      border-color: var(--primary);
      transform: translateY(-2px);
    }

    .tech-chip.hot {
      background: #fee2e2;
      color: #dc2626;
      border-color: #fca5a5;
    }

    .tech-chip.brand {
      background: #e0e7ff;
      color: var(--primary);
      border-color: #a5b4fc;
    }

    .tech-metric-box {
      background: linear-gradient(135deg, #f8fafc 0%, #eef2ff 100%);
      border-radius: var(--radius-md);
      padding: 18px;
      border: 1px solid #c7d2fe;
    }

    .metric-row {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 10px;
      font-size: 0.9rem;
    }

    .metric-row:last-child {
      margin-bottom: 0;
    }

    .metric-val {
      font-weight: 800;
      color: var(--primary);
    }

    .metric-val.green {
      color: var(--accent-green);
    }

    .metric-val.orange {
      color: var(--accent-orange);
    }

    /* Global Multi-Grid Modules */
    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 22px;
    }

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

    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 28px;
    }

    /* Card Standard Styles */
    .feature-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      padding: 28px 24px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
      position: relative;
      overflow: hidden;
    }

    .feature-card::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 4px;
      background: linear-gradient(90deg, var(--primary), var(--accent-cyan));
      opacity: 0;
      transition: opacity 0.3s;
    }

    .feature-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-hover);
      border-color: #cbd5e1;
    }

    .feature-card:hover::before {
      opacity: 1;
    }

    .card-icon {
      width: 52px;
      height: 52px;
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.5rem;
      margin-bottom: 18px;
      background: #eef2ff;
      color: var(--primary);
    }

    .card-icon.orange {
      background: #ffedd5;
      color: var(--accent-orange);
    }

    .card-icon.cyan {
      background: #cffafe;
      color: #0891b2;
    }

    .card-icon.green {
      background: #d1fae5;
      color: var(--accent-green);
    }

    .card-icon.purple {
      background: #f3e8ff;
      color: var(--accent-purple);
    }

    .card-title {
      font-size: 1.22rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }

    .card-desc {
      font-size: 0.94rem;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
    }

    .card-badge {
      display: inline-block;
      font-size: 0.75rem;
      font-weight: 700;
      padding: 3px 8px;
      border-radius: 4px;
      background: #f1f5f9;
      color: var(--text-light);
      margin-top: 14px;
      align-self: flex-start;
    }

    /* Workflow Step Cards */
    .step-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px 22px;
      position: relative;
      box-shadow: var(--shadow-sm);
    }

    .step-number {
      font-size: 2.2rem;
      font-weight: 900;
      color: #cbd5e1;
      line-height: 1;
      margin-bottom: 12px;
    }

    .step-card:hover .step-number {
      color: var(--accent-orange);
    }

    /* Image Asset Showcases */
    .media-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: transform 0.3s, box-shadow 0.3s;
    }

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

    .media-thumb-wrapper {
      width: 100%;
      aspect-ratio: 16 / 9;
      overflow: hidden;
      background: #e2e8f0;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .media-thumb-wrapper.square {
      aspect-ratio: 1 / 1;
    }

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

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

    .media-body {
      padding: 20px;
    }

    .media-tag {
      font-size: 0.78rem;
      font-weight: 700;
      color: var(--primary);
      text-transform: uppercase;
      margin-bottom: 6px;
      display: block;
    }

    /* Comparison Review Table (5 Stars, 9.9 Points) */
    .rating-header-box {
      background: linear-gradient(135deg, #1e1b4b 0%, #312e81 100%);
      color: #ffffff;
      border-radius: var(--radius-lg);
      padding: 36px;
      margin-bottom: 30px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 20px;
      box-shadow: var(--shadow-md);
    }

    .rating-score-group {
      display: flex;
      align-items: center;
      gap: 24px;
    }

    .score-badge {
      font-size: 3.5rem;
      font-weight: 900;
      color: #facc15;
      line-height: 1;
    }

    .score-info h3 {
      font-size: 1.4rem;
      margin-bottom: 6px;
    }

    .stars-row {
      color: #facc15;
      font-size: 1.2rem;
      margin-bottom: 4px;
    }

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

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

    .comp-table th, .comp-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
      font-size: 0.95rem;
    }

    .comp-table th {
      background: #f8fafc;
      font-weight: 700;
      color: var(--text-main);
    }

    .comp-table th.brand-col, .comp-table td.brand-col {
      background: #f5f7ff;
      color: var(--primary);
      font-weight: 700;
    }

    .check-yes {
      color: var(--accent-green);
      font-weight: 700;
    }

    .check-no {
      color: #94a3b8;
    }

    /* Customer Reviews */
    .testimonial-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      padding: 24px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .testimonial-text {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 18px;
      font-style: italic;
    }

    .testimonial-user {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #f1f5f9;
      padding-top: 14px;
    }

    .user-avatar-placeholder {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary), var(--accent-orange));
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1rem;
    }

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

    .user-role {
      font-size: 0.82rem;
      color: var(--text-light);
    }

    /* Token Price & Match Section */
    .token-box {
      background: #ffffff;
      border-radius: var(--radius-md);
      padding: 24px;
      border: 1px solid #c7d2fe;
      box-shadow: var(--shadow-sm);
      text-align: center;
      transition: all 0.3s;
    }

    .token-box:hover {
      border-color: var(--primary);
      transform: translateY(-4px);
    }

    .token-price {
      font-size: 2rem;
      font-weight: 900;
      color: var(--accent-orange);
      margin: 10px 0;
    }

    .token-price small {
      font-size: 0.9rem;
      color: var(--text-light);
      font-weight: 500;
    }

    /* FAQ Accordion */
    .faq-container {
      max-width: 860px;
      margin: 0 auto;
    }

    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      margin-bottom: 14px;
      overflow: hidden;
      transition: border-color 0.2s;
    }

    .faq-item:hover {
      border-color: #cbd5e1;
    }

    .faq-question {
      padding: 20px 24px;
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }

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

    .faq-answer {
      padding: 0 24px;
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease, padding 0.35s ease;
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

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

    .faq-item.active .faq-answer {
      padding-bottom: 20px;
      max-height: 250px;
    }

    /* Form & Contact Section */
    .contact-wrapper {
      background: #ffffff;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      padding: 40px;
      box-shadow: var(--shadow-md);
    }

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

    .form-label {
      display: block;
      font-size: 0.92rem;
      font-weight: 700;
      margin-bottom: 8px;
      color: var(--text-main);
    }

    .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: #f8fafc;
      transition: border-color 0.2s, background 0.2s;
    }

    .form-control:focus {
      outline: none;
      border-color: var(--primary);
      background: #ffffff;
    }

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

    .contact-info-list {
      list-style: none;
      margin-top: 20px;
    }

    .contact-info-item {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 16px;
      font-size: 0.96rem;
      color: var(--text-muted);
    }

    .contact-qr-box {
      margin-top: 24px;
      padding: 16px;
      background: #f8fafc;
      border-radius: var(--radius-md);
      display: inline-block;
      border: 1px dashed #cbd5e1;
      text-align: center;
    }

    .contact-qr-box img {
      width: 140px;
      height: 140px;
      object-fit: contain;
      border-radius: 6px;
      display: block;
      margin: 0 auto 8px;
    }

    /* Articles & Links Box */
    .article-links-cloud, .friend-links-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
    }

    .article-links-cloud a, .friend-links-cloud a {
      padding: 8px 16px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--text-muted);
    }

    .article-links-cloud a:hover, .friend-links-cloud a:hover {
      color: var(--primary);
      border-color: var(--primary);
      background: #eef2ff;
    }

    /* Footer */
    .site-footer {
      background: #0f172a;
      color: #94a3b8;
      padding: 60px 0 30px;
      border-top: 1px solid #1e293b;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 36px;
      margin-bottom: 40px;
    }

    .footer-col h4 {
      color: #f8fafc;
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 18px;
    }

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

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

    .footer-links li a {
      color: #94a3b8;
      font-size: 0.92rem;
    }

    .footer-links li a:hover {
      color: #ffffff;
      padding-left: 4px;
    }

    .footer-bottom {
      border-top: 1px solid #1e293b;
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
      font-size: 0.88rem;
    }

    /* Floating Widget */
    .floating-kefu-btn {
      position: fixed;
      right: 24px;
      bottom: 30px;
      z-index: 999;
      background: linear-gradient(135deg, var(--accent-orange), #ea580c);
      color: #ffffff;
      padding: 12px 20px;
      border-radius: var(--radius-full);
      box-shadow: 0 8px 24px rgba(255, 87, 34, 0.4);
      display: flex;
      align-items: center;
      gap: 8px;
      font-weight: 700;
      font-size: 0.95rem;
      cursor: pointer;
      transition: transform 0.3s;
    }

    .floating-kefu-btn:hover {
      transform: scale(1.05);
      color: #ffffff;
    }

    /* Responsive Media Queries */
    @media (max-width: 992px) {
      .hero-grid {
        grid-template-columns: 1fr;
      }
      .grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-3 {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .nav-links {
        display: none;
      }
      .mobile-menu-btn {
        display: block;
      }
      .nav-links.show-mobile {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 76px;
        left: 0;
        right: 0;
        background: #ffffff;
        padding: 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
      }
      .nav-links.show-mobile li a {
        width: 100%;
        padding: 12px 0;
      }
    }

    @media (max-width: 640px) {
      .section-padding {
        padding: 50px 0;
      }
      .section-title {
        font-size: 1.75rem;
      }
      .hero-content h1 {
        font-size: 1.9rem;
      }
      .grid-4, .grid-3, .grid-2 {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .contact-wrapper {
        padding: 24px;
      }
      .rating-header-box {
        padding: 24px;
      }
    }