/* CSS Standard Reset & Cyan-Teal Tech Theme Variables */
    :root {
      --primary-color: #0d9488;
      --primary-hover: #0f766e;
      --primary-light: #ccfbf1;
      --secondary-color: #028090;
      --accent-color: #00a896;
      --text-main: #1e293b;
      --text-muted: #64748b;
      --bg-body: #f8fafc;
      --bg-surface: #ffffff;
      --bg-alt: #f1f5f9;
      --border-color: #e2e8f0;
      --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
      --shadow-md: 0 4px 12px rgba(13,148,136,0.08);
      --shadow-lg: 0 10px 25px rgba(13,148,136,0.12);
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 18px;
      --container-width: 1200px;
    }

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

    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
      color: var(--text-main);
      background-color: var(--bg-body);
      line-height: 1.6;
    }

    body {
      overflow-x: hidden;
      display: flex;
      flex-direction: column;
      min-height: 100vh;
    }

    /* Container Utility */
    .container {
      width: 100%;
      max-width: var(--container-width);
      margin: 0 auto;
      padding: 0 20px;
    }

    /* Top Navigation Bar */
    .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);
      box-shadow: var(--shadow-sm);
    }

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

    .brand-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      text-decoration: none;
    }

    .brand-logo img {
      max-height: 44px;
      width: auto;
      object-fit: contain;
    }

    .brand-name {
      font-size: 20px;
      font-weight: 700;
      color: var(--primary-hover);
      letter-spacing: -0.5px;
    }

    /* REQUIRED CSS RULE: .nav-links gap must be 0 */
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
    }

    .nav-links li a {
      display: inline-block;
      padding: 8px 14px;
      font-size: 14px;
      font-weight: 500;
      color: var(--text-main);
      text-decoration: none;
      transition: color 0.2s ease, background-color 0.2s ease;
      border-radius: var(--radius-sm);
    }

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

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 14px;
      font-weight: 600;
      border-radius: var(--radius-sm);
      text-decoration: none;
      cursor: pointer;
      border: 1px solid transparent;
      transition: all 0.25s ease;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
      color: #ffffff;
      box-shadow: 0 4px 10px rgba(13, 148, 136, 0.25);
    }

    .btn-primary:hover {
      background: linear-gradient(135deg, var(--primary-hover), var(--secondary-color));
      transform: translateY(-1px);
      box-shadow: 0 6px 15px rgba(13, 148, 136, 0.35);
    }

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

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

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

    /* Section Global Styles */
    section {
      padding: 70px 0;
      position: relative;
    }

    .section-alt {
      background-color: var(--bg-alt);
    }

    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 50px auto;
    }

    .section-tag {
      display: inline-block;
      padding: 4px 14px;
      background-color: var(--primary-light);
      color: var(--primary-hover);
      font-size: 13px;
      font-weight: 700;
      border-radius: 50px;
      margin-bottom: 12px;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }

    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 14px;
      letter-spacing: -0.5px;
    }

    .section-desc {
      font-size: 16px;
      color: var(--text-muted);
    }

    /* SECTION 1: HERO SECTION (Strictly NO IMAGES in Hero) */
    .hero-section {
      background: linear-gradient(135deg, #f0fdf4 0%, #e0f2fe 50%, #f0f9ff 100%);
      padding: 90px 0 80px 0;
      border-bottom: 1px solid var(--border-color);
    }

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

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: #ffffff;
      border: 1px solid #bdf2e9;
      padding: 6px 18px;
      border-radius: 30px;
      font-size: 14px;
      font-weight: 600;
      color: var(--primary-hover);
      margin-bottom: 24px;
      box-shadow: var(--shadow-sm);
    }

    /* REQUIRED H1 改写 (<= 20 chars) */
    .hero-h1 {
      font-size: 40px;
      line-height: 1.25;
      font-weight: 900;
      color: #0f172a;
      margin-bottom: 20px;
      letter-spacing: -1px;
    }

    .hero-subtitle {
      font-size: 18px;
      color: #475569;
      margin-bottom: 36px;
      line-height: 1.7;
    }

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

    .btn-hero-official {
      background: linear-gradient(135deg, #0d9488, #028090);
      color: #ffffff;
      padding: 14px 34px;
      font-size: 16px;
      font-weight: 700;
      border-radius: 8px;
      box-shadow: 0 8px 20px rgba(13, 148, 136, 0.3);
    }

    .btn-hero-official:hover {
      transform: translateY(-2px);
      box-shadow: 0 12px 25px rgba(13, 148, 136, 0.4);
    }

    .hero-features-strip {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      gap: 20px;
      margin-top: 30px;
      padding-top: 30px;
      border-top: 1px solid rgba(15, 23, 42, 0.08);
    }

    .strip-item {
      background: rgba(255, 255, 255, 0.7);
      padding: 14px;
      border-radius: var(--radius-md);
      border: 1px solid #e2e8f0;
      text-align: center;
    }

    .strip-item strong {
      display: block;
      color: var(--primary-hover);
      font-size: 16px;
      margin-bottom: 4px;
    }

    .strip-item span {
      font-size: 13px;
      color: var(--text-muted);
    }

    /* SECTION 2: ABOUT US & PLATFORM INTRO */
    .about-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }

    .about-text h3 {
      font-size: 26px;
      font-weight: 700;
      margin-bottom: 16px;
      color: #0f172a;
    }

    .about-text p {
      color: #475569;
      margin-bottom: 16px;
      font-size: 15px;
    }

    .model-tags-container {
      margin-top: 20px;
    }

    .model-tags-title {
      font-size: 14px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }

    .model-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }

    .tag-badge {
      background: var(--bg-alt);
      border: 1px solid var(--border-color);
      color: var(--text-main);
      padding: 4px 10px;
      border-radius: 4px;
      font-size: 12px;
      font-weight: 600;
    }

    .about-media-box {
      background: #ffffff;
      padding: 20px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-md);
      border: 1px solid var(--border-color);
      text-align: center;
    }

    /* SECTION 3 & 4: AIGC SERVICES & ONE-STOP CREATION */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 24px;
    }

    .card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      transition: all 0.3s ease;
      position: relative;
    }

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

    .card-icon-box {
      width: 48px;
      height: 48px;
      background: var(--primary-light);
      color: var(--primary-hover);
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 22px;
      font-weight: bold;
      margin-bottom: 16px;
    }

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

    .card-desc {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* SECTION 5: INDUSTRY SOLUTIONS */
    .solutions-tabs {
      display: flex;
      justify-content: center;
      gap: 10px;
      margin-bottom: 30px;
      flex-wrap: wrap;
    }

    .tab-btn {
      padding: 10px 20px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 30px;
      cursor: pointer;
      font-size: 14px;
      font-weight: 600;
      color: var(--text-muted);
      transition: all 0.2s ease;
    }

    .tab-btn.active, .tab-btn:hover {
      background: var(--primary-color);
      color: #ffffff;
      border-color: var(--primary-color);
    }

    .solution-display-card {
      background: var(--bg-surface);
      border-radius: var(--radius-lg);
      padding: 36px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .solution-inner {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 30px;
      align-items: center;
    }

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

    .solution-list li {
      position: relative;
      padding-left: 24px;
      margin-bottom: 12px;
      font-size: 15px;
      color: var(--text-main);
    }

    .solution-list li::before {
      content: "✓";
      position: absolute;
      left: 0;
      color: var(--primary-color);
      font-weight: bold;
    }

    /* SECTION 6: SERVICE NETWORK */
    .network-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 20px;
    }

    .network-node {
      background: var(--bg-surface);
      padding: 20px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      text-align: center;
    }

    .network-node h4 {
      font-size: 16px;
      color: var(--primary-hover);
      margin-bottom: 6px;
    }

    .network-node p {
      font-size: 13px;
      color: var(--text-muted);
    }

    /* SECTION 7: STANDARD WORKFLOW */
    .workflow-steps {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
      gap: 20px;
    }

    .step-card {
      background: var(--bg-surface);
      border-radius: var(--radius-md);
      padding: 24px;
      border-top: 4px solid var(--primary-color);
      box-shadow: var(--shadow-sm);
    }

    .step-num {
      font-size: 28px;
      font-weight: 900;
      color: var(--primary-color);
      margin-bottom: 8px;
    }

    .step-title {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .step-desc {
      font-size: 13px;
      color: var(--text-muted);
    }

    /* SECTION 8: CASE CENTER */
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
      gap: 24px;
    }

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

    .case-img-wrap {
      width: 100%;
      height: 200px;
      overflow: hidden;
      background: #e2e8f0;
    }

    .case-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.3s ease;
    }

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

    .case-body {
      padding: 20px;
    }

    .case-tag {
      font-size: 12px;
      color: var(--primary-color);
      font-weight: 700;
      text-transform: uppercase;
    }

    .case-title {
      font-size: 17px;
      font-weight: 700;
      margin: 6px 0;

    }

    .case-desc {
      font-size: 13px;
      color: var(--text-muted);
    }

    /* SECTION 9: COMPARISON & EVALUATION */
    .eval-highlight-box {
      background: linear-gradient(135deg, #0d9488 0%, #028090 100%);
      color: #ffffff;
      border-radius: var(--radius-lg);
      padding: 30px;
      margin-bottom: 30px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 20px;
    }

    .eval-score-num {
      font-size: 48px;
      font-weight: 900;
      line-height: 1;
    }

    .eval-stars {
      color: #fbbf24;
      font-size: 24px;
      margin-top: 4px;
    }

    .compare-table-wrapper {
      overflow-x: auto;
      background: var(--bg-surface);
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
    }

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 14px;
    }

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

    .compare-table th {
      background: var(--bg-alt);
      font-weight: 700;
      color: var(--text-main);
    }

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

    .compare-table .highlight-col {
      background: rgba(13, 148, 136, 0.05);
      font-weight: 700;
      color: var(--primary-hover);
    }

    /* SECTION 10: DEMAND MATCHING */
    .matching-box {
      background: var(--bg-surface);
      padding: 30px;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .matching-options {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      gap: 16px;
      margin-top: 20px;
    }

    .match-option-btn {
      padding: 16px;
      border: 2px solid var(--border-color);
      border-radius: var(--radius-md);
      text-align: center;
      cursor: pointer;
      background: #ffffff;
      transition: all 0.2s;
    }

    .match-option-btn:hover, .match-option-btn.selected {
      border-color: var(--primary-color);
      background: var(--primary-light);
    }

    .match-option-btn strong {
      display: block;
      color: var(--text-main);
      margin-bottom: 4px;
    }

    .match-option-btn span {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* SECTION 11: TOKEN PRICE COMPARISON */
    .token-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
      gap: 20px;
    }

    .token-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 20px;
    }

    .token-model-name {
      font-size: 16px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .token-price {
      font-size: 22px;
      font-weight: 800;
      color: var(--primary-color);
      margin-bottom: 6px;
    }

    .token-desc {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* SECTION 12: HELP CENTER & USER REVIEWS */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: 20px;
    }

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

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

    .avatar-placeholder {
      width: 44px;
      height: 44px;
      background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
      color: #ffffff;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
    }

    .review-info h5 {
      font-size: 15px;
      font-weight: 700;
    }

    .review-info p {
      font-size: 12px;
      color: var(--text-muted);
    }

    .review-content {
      font-size: 14px;
      color: var(--text-main);
      line-height: 1.6;
    }

    /* SECTION 13: FAQ ACCORDION */
    .faq-container {
      max-width: 860px;
      margin: 0 auto;
    }

    .faq-item {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      margin-bottom: 12px;
      overflow: hidden;
    }

    .faq-question {
      padding: 18px 24px;
      font-size: 16px;
      font-weight: 700;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }

    .faq-question::after {
      content: "+";
      font-size: 20px;
      color: var(--primary-color);
      transition: transform 0.2s;
    }

    .faq-item.active .faq-question::after {
      content: "-";
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      background: #f8fafc;
    }

    .faq-answer-content {
      padding: 0 24px 18px 24px;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    .faq-item.active .faq-answer {
      max-height: 300px;
    }

    /* SECTION 14 & 15: AI ENCYCLOPEDIA & INDUSTRY NEWS */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 20px;
    }

    .news-card {
      background: var(--bg-surface);
      padding: 20px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
    }

    .news-date {
      font-size: 12px;
      color: var(--primary-color);
      margin-bottom: 6px;
    }

    .news-title {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .news-title a {
      color: var(--text-main);
      text-decoration: none;
    }

    .news-title a:hover {
      color: var(--primary-color);
    }

    .news-excerpt {
      font-size: 13px;
      color: var(--text-muted);
    }

    /* SECTION 16: CONTACT US & FORM */
    .contact-wrapper {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
    }

    .contact-info-card {
      background: var(--bg-surface);
      padding: 30px;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
    }

    .contact-item {
      display: flex;
      align-items: flex-start;
      gap: 16px;
      margin-bottom: 20px;
    }

    .contact-qr-box img {
      max-width: 140px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-color);
    }

    .form-card {
      background: var(--bg-surface);
      padding: 30px;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .form-group {
      margin-bottom: 16px;
    }

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

    .form-control {
      width: 100%;
      padding: 10px 14px;
      font-size: 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      outline: none;
      transition: border-color 0.2s;
    }

    .form-control:focus {
      border-color: var(--primary-color);
    }

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

    /* SECTION 17: FRANCHISE & AGENCY */
    .agency-box {
      background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
      color: #ffffff;
      padding: 40px;
      border-radius: var(--radius-lg);
      text-align: center;
    }

    .agency-box h3 {
      font-size: 28px;
      font-weight: 800;
      margin-bottom: 12px;
      color: #38bdf8;
    }

    .agency-box p {
      color: #94a3b8;
      max-width: 650px;
      margin: 0 auto 24px auto;
      font-size: 15px;
    }

    /* Footer */
    .site-footer {
      background-color: #0f172a;
      color: #94a3b8;
      padding: 50px 0 20px 0;
      border-top: 1px solid #1e293b;
      margin-top: auto;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 30px;
      margin-bottom: 40px;
    }

    .footer-col h5 {
      color: #ffffff;
      font-size: 15px;
      font-weight: 700;
      margin-bottom: 16px;
    }

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

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

    .footer-links a {
      color: #94a3b8;
      text-decoration: none;
      font-size: 13px;
      transition: color 0.2s;
    }

    .footer-links a:hover {
      color: #38bdf8;
    }

    .friend-links {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
    }

    .friend-links a {
      color: #94a3b8;
      font-size: 13px;
      text-decoration: none;
    }

    .friend-links a:hover {
      color: #ffffff;
    }

    .footer-bottom {
      border-top: 1px solid #1e293b;
      padding-top: 20px;
      text-align: center;
      font-size: 13px;
    }

    /* Floating Customer Service Widget */
    .float-widget {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 48px;
      height: 48px;
      background: var(--primary-color);
      color: #ffffff;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: var(--shadow-md);
      cursor: pointer;
      text-decoration: none;
      font-size: 12px;
      font-weight: bold;
      transition: transform 0.2s;
    }

    .float-btn:hover {
      transform: scale(1.1);
    }

    /* Responsive Adjustments */
    @media (max-width: 992px) {
      .about-grid, .solution-inner, .contact-wrapper {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .hero-h1 {
        font-size: 30px;
      }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        padding: 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
      }
      .nav-links.show {
        display: flex;
      }
      .nav-toggle {
        display: block;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }