:root {
      --primary-color: #1e40af;
      --primary-hover: #1d4ed8;
      --accent-color: #2563eb;
      --light-bg: #f8fafc;
      --card-bg: #ffffff;
      --text-main: #0f172a;
      --text-sub: #475569;
      --border-color: #e2e8f0;
      --highlight-color: #0284c7;
      --radius: 10px;
      --shadow: 0 10px 25px -5px rgba(30, 64, 175, 0.08), 0 8px 10px -6px rgba(30, 64, 175, 0.04);
    }

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

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

    body {
      width: 100%;
      overflow-x: hidden;
      background-color: var(--light-bg);
    }

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
      width: 100%;
    }

    /* Header & Nav */
    header {
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      position: sticky;
      top: 0;
      z-index: 1000;
      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: 70px;
    }

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

    .ai-page-logo {
      max-height: 40px;
      width: auto;
      display: block;
    }

    .brand-title {
      font-size: 20px;
      font-weight: 700;
      color: var(--primary-color);
      text-decoration: none;
    }

    /* Requirement constraint: gap: 0 for .nav-links */
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
    }

    .nav-links li {
      display: inline-block;
    }

    .nav-links a {
      text-decoration: none;
      color: var(--text-main);
      font-size: 14px;
      font-weight: 500;
      padding: 8px 12px;
      display: block;
      transition: color 0.2s;
    }

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

    .nav-btn {
      background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
      color: #fff !important;
      border-radius: 6px;
      padding: 8px 16px !important;
      margin-left: 8px;
      font-weight: 600 !important;
      transition: transform 0.2s, box-shadow 0.2s !important;
    }

    .nav-btn:hover {
      transform: translateY(-1px);
      box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
    }

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

    /* Hero Section (No images allowed) */
    .hero-section {
      padding: 90px 0 70px;
      background: linear-gradient(180deg, #eff6ff 0%, var(--light-bg) 100%);
      text-align: center;
      position: relative;
    }

    .hero-badge {
      display: inline-block;
      padding: 6px 16px;
      background-color: #dbeafe;
      color: var(--primary-color);
      border-radius: 20px;
      font-size: 13px;
      font-weight: 600;
      margin-bottom: 20px;
    }

    .hero-title {
      font-size: 38px;
      line-height: 1.25;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-desc {
      max-width: 820px;
      margin: 0 auto 35px;
      font-size: 17px;
      color: var(--text-sub);
      line-height: 1.7;
    }

    .hero-actions {
      display: flex;
      justify-content: center;
      gap: 16px;
      margin-bottom: 50px;
      flex-wrap: wrap;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 12px 28px;
      border-radius: 8px;
      font-size: 15px;
      font-weight: 600;
      text-decoration: none;
      cursor: pointer;
      transition: all 0.25s ease;
      border: none;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--primary-color) 0%, #2563eb 100%);
      color: #ffffff;
      box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
    }

    .btn-primary:hover {
      background: linear-gradient(135deg, #1d4ed8 0%, #1e40af 100%);
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(37, 99, 235, 0.45);
    }

    .btn-secondary {
      background-color: #ffffff;
      color: var(--text-main);
      border: 1px solid var(--border-color);
      box-shadow: 0 2px 5px rgba(0,0,0,0.04);
    }

    .btn-secondary:hover {
      background-color: #f1f5f9;
      color: var(--primary-color);
      transform: translateY(-2px);
    }

    .hero-stats {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      max-width: 1000px;
      margin: 0 auto;
    }

    .stat-card {
      background: #ffffff;
      padding: 22px 15px;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow);
    }

    .stat-num {
      font-size: 28px;
      font-weight: 800;
      color: var(--primary-color);
      margin-bottom: 4px;
    }

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

    /* Common Section Styles */
    section {
      padding: 70px 0;
    }

    .section-title-wrap {
      text-align: center;
      margin-bottom: 45px;
    }

    .section-subtitle {
      font-size: 13px;
      font-weight: 700;
      color: var(--accent-color);
      text-transform: uppercase;
      letter-spacing: 1px;
      margin-bottom: 8px;
      display: block;
    }

    .section-title {
      font-size: 28px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 12px;
    }

    .section-intro {
      font-size: 15px;
      color: var(--text-sub);
      max-width: 700px;
      margin: 0 auto;
    }

    /* About Platform */
    .about-card {
      background: var(--card-bg);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 35px;
      box-shadow: var(--shadow);
      margin-bottom: 30px;
    }

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

    .about-text p {
      margin-bottom: 16px;
      color: var(--text-sub);
      font-size: 15px;
    }

    .model-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: 15px;
    }

    .model-tag {
      background: #eff6ff;
      color: var(--primary-color);
      padding: 4px 10px;
      border-radius: 4px;
      font-size: 12px;
      font-weight: 600;
      border: 1px solid #bfdbfe;
    }

    /* Service Cards Grid */
    .service-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
      gap: 20px;
    }

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

    .service-card:hover {
      transform: translateY(-4px);
      box-shadow: 0 12px 24px -6px rgba(30, 64, 175, 0.12);
      border-color: #93c5fd;
    }

    .service-icon {
      width: 46px;
      height: 46px;
      background: #dbeafe;
      color: var(--primary-color);
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 18px;
      margin-bottom: 16px;
    }

    .service-card h3 {
      font-size: 17px;
      font-weight: 700;
      margin-bottom: 8px;
      color: var(--text-main);
    }

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

    /* Standard Process Step Component */
    .process-steps {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      gap: 20px;
      position: relative;
    }

    .step-card {
      background: var(--card-bg);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 25px 20px;
      text-align: center;
      position: relative;
    }

    .step-num {
      width: 36px;
      height: 36px;
      background: var(--primary-color);
      color: #fff;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 15px;
      font-weight: 700;
      font-size: 15px;
    }

    .step-card h3 {
      font-size: 16px;
      margin-bottom: 8px;
    }

    .step-card p {
      font-size: 13px;
      color: var(--text-sub);
    }

    /* Comparison Table Component */
    .comparison-container {
      background: var(--card-bg);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 30px;
      box-shadow: var(--shadow);
    }

    .score-banner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      background: linear-gradient(135deg, #1e40af, #3b82f6);
      color: #fff;
      padding: 20px 30px;
      border-radius: 8px;
      margin-bottom: 30px;
      flex-wrap: wrap;
      gap: 15px;
    }

    .score-left h4 {
      font-size: 20px;
      margin-bottom: 4px;
    }

    .score-left p {
      font-size: 13px;
      opacity: 0.9;
    }

    .score-right {
      text-align: right;
    }

    .score-stars {
      color: #fbbf24;
      font-size: 20px;
      margin-bottom: 2px;
    }

    .score-number {
      font-size: 28px;
      font-weight: 800;
    }

    .table-wrapper {
      overflow-x: auto;
    }

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

    .comp-table th, .comp-table td {
      padding: 14px 18px;
      border-bottom: 1px solid var(--border-color);
    }

    .comp-table th {
      background: #f1f5f9;
      font-weight: 700;
      color: var(--text-main);
    }

    .comp-table tr:hover {
      background: #f8fafc;
    }

    .badge-recommend {
      background: #dcfce7;
      color: #15803d;
      font-weight: 700;
      padding: 3px 8px;
      border-radius: 4px;
      font-size: 12px;
    }

    /* Token Price Table */
    .token-table-wrap {
      background: var(--card-bg);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 25px;
      box-shadow: var(--shadow);
    }

    /* Customer Reviews */
    .review-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
      gap: 20px;
    }

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

    .review-content {
      font-size: 14px;
      color: var(--text-sub);
      margin-bottom: 16px;
      font-style: italic;
      line-height: 1.6;
    }

    .review-author {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .avatar-placeholder {
      width: 42px;
      height: 42px;
      background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
      color: #fff;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 16px;
    }

    .author-info h4 {
      font-size: 14px;
      font-weight: 700;
    }

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

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

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

    .gallery-card-body {
      padding: 16px;
    }

    .gallery-card-body h3 {
      font-size: 15px;
      margin-bottom: 6px;
    }

    .gallery-card-body p {
      font-size: 12px;
      color: var(--text-sub);
    }

    .ai-page-image {
      width: 100%;
      height: auto;
      display: block;
      object-fit: cover;
    }

    /* FAQ Accordion */
    .faq-list {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

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

    .faq-question {
      padding: 18px 20px;
      font-weight: 700;
      font-size: 15px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: #ffffff;
      user-select: none;
    }

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

    .faq-answer {
      padding: 0 20px 18px;
      font-size: 14px;
      color: var(--text-sub);
      display: none;
      line-height: 1.6;
      border-top: 1px solid #f1f5f9;
      padding-top: 12px;
    }

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

    .faq-icon {
      font-size: 16px;
      transition: transform 0.2s;
    }

    .faq-item.active .faq-icon {
      transform: rotate(180deg);
    }

    /* Contact Form & Side Links */
    .contact-container {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      background: var(--card-bg);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 40px;
      box-shadow: var(--shadow);
    }

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

    .form-group label {
      display: block;
      font-size: 13px;
      font-weight: 600;
      margin-bottom: 6px;
      color: var(--text-main);
    }

    .form-control {
      width: 100%;
      padding: 10px 14px;
      border: 1px solid var(--border-color);
      border-radius: 6px;
      font-size: 14px;
      outline: none;
      transition: border-color 0.2s;
    }

    .form-control:focus {
      border-color: var(--primary-color);
      box-shadow: 0 0 0 3px rgba(30, 64, 175, 0.1);
    }

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

    .contact-info-box h3 {
      font-size: 18px;
      margin-bottom: 15px;
    }

    .contact-info-list p {
      font-size: 14px;
      color: var(--text-sub);
      margin-bottom: 10px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .qr-code-wrap {
      margin-top: 20px;
      text-align: center;
      background: #f8fafc;
      padding: 15px;
      border-radius: 8px;
      border: 1px dashed var(--border-color);
    }

    .qr-code-wrap img {
      max-width: 140px;
      height: auto;
      border-radius: 6px;
    }

    /* Agency Franchise Section */
    .agency-card {
      background: linear-gradient(135deg, #1e3a8a 0%, #1e40af 100%);
      color: #ffffff;
      border-radius: var(--radius);
      padding: 40px;
      text-align: center;
    }

    .agency-card h3 {
      font-size: 26px;
      margin-bottom: 15px;
    }

    .agency-card p {
      font-size: 15px;
      max-width: 700px;
      margin: 0 auto 25px;
      opacity: 0.9;
    }

    .agency-features {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      gap: 15px;
      margin-bottom: 30px;
    }

    .agency-feat-item {
      background: rgba(255, 255, 255, 0.1);
      padding: 15px;
      border-radius: 8px;
      font-size: 14px;
      font-weight: 600;
    }

    /* Article News Section */
    .article-links-wrap {
      background: var(--card-bg);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 25px;
    }

    .article-links-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .article-links-list a {
      color: var(--primary-color);
      text-decoration: none;
      font-size: 14px;
      font-weight: 600;
      padding: 8px 12px;
      border-radius: 4px;
      background: #f8fafc;
      transition: background 0.2s;
    }

    .article-links-list a:hover {
      background: #eff6ff;
    }

    /* Footer Links & Standard Footer */
    footer {
      background: #0f172a;
      color: #94a3b8;
      padding: 50px 0 25px;
      font-size: 13px;
    }

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

    .footer-col h4 {
      color: #ffffff;
      font-size: 15px;
      margin-bottom: 15px;
    }

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

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

    .footer-links-list a {
      color: #94a3b8;
      text-decoration: none;
      transition: color 0.2s;
    }

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

    .friend-links-area {
      border-top: 1px solid #334155;
      padding-top: 20px;
      margin-bottom: 25px;
    }

    .friend-links-title {
      color: #e2e8f0;
      font-weight: 600;
      margin-bottom: 10px;
    }

    .friend-links-flex {
      display: flex;
      flex-wrap: wrap;
      gap: 15px;
    }

    .friend-links-flex a {
      color: #94a3b8;
      text-decoration: none;
    }

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

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

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

    .float-btn {
      width: 50px;
      height: 50px;
      border-radius: 50%;
      background: var(--primary-color);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 12px rgba(0,0,0,0.2);
      text-decoration: none;
      font-size: 12px;
      font-weight: 700;
      text-align: center;
      line-height: 1.2;
    }

    /* Responsive */
    @media (max-width: 992px) {
      .hero-stats {
        grid-template-columns: repeat(2, 1fr);
      }
      .contact-container {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .about-grid {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .hero-title {
        font-size: 26px;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        padding: 20px;
        box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        border-bottom: 1px solid var(--border-color);
      }
      .nav-links.active {
        display: flex;
      }
      .mobile-menu-toggle {
        display: block;
      }
      .hero-stats {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }