/* CSS Standard & Color Palette (Vibrant Accent Style / 撞色艳色风) */
    :root {
      --primary: #4f46e5;
      --primary-dark: #3730a3;
      --accent-orange: #ff5722;
      --accent-cyan: #00d2ff;
      --accent-pink: #ec4899;
      --bg-light: #f8fafc;
      --bg-white: #ffffff;
      --text-main: #0f172a;
      --text-muted: #475569;
      --border-color: #e2e8f0;
      --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.06);
      --shadow-lg: 0 12px 32px rgba(79, 70, 229, 0.12);
      --radius: 12px;
      --max-width: 1200px;
    }

    * {
      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(--bg-light);
      color: var(--text-main);
      line-height: 1.6;
    }

    body {
      overflow-x: hidden;
      background: linear-gradient(180deg, #f1f5f9 0%, #f8fafc 100%);
    }

    a {
      color: var(--primary);
      text-decoration: none;
      transition: color 0.2s;
    }
    a:hover {
      color: var(--accent-orange);
    }

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

    /* Top Bar & Header Nav */
    header.ai-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: 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;
    }

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

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

    .nav-links li a {
      padding: 8px 14px;
      font-size: 15px;
      font-weight: 500;
      color: var(--text-main);
      border-radius: 6px;
      transition: all 0.2s;
    }

    .nav-links li a:hover {
      background: rgba(79, 70, 229, 0.08);
      color: var(--primary);
    }

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

    .btn-vibrant {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      background: linear-gradient(135deg, var(--accent-orange), #ff7849);
      color: #ffffff !important;
      font-weight: 600;
      border-radius: 30px;
      box-shadow: 0 4px 14px rgba(255, 87, 34, 0.35);
      transition: transform 0.2s, box-shadow 0.2s;
      border: none;
      cursor: pointer;
    }

    .btn-vibrant:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(255, 87, 34, 0.5);
    }

    .btn-outline {
      display: inline-flex;
      align-items: center;
      padding: 10px 20px;
      border: 2px solid var(--primary);
      color: var(--primary) !important;
      font-weight: 600;
      border-radius: 30px;
      transition: all 0.2s;
    }

    .btn-outline:hover {
      background: var(--primary);
      color: #fff !important;
    }

    .mobile-menu-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-header {
      text-align: center;
      margin-bottom: 45px;
    }

    .section-badge {
      display: inline-block;
      padding: 4px 14px;
      background: linear-gradient(90deg, rgba(79, 70, 229, 0.1), rgba(236, 72, 153, 0.1));
      color: var(--primary);
      font-size: 13px;
      font-weight: 700;
      border-radius: 20px;
      margin-bottom: 12px;
      letter-spacing: 1px;
    }

    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 12px;
    }

    .section-desc {
      font-size: 16px;
      color: var(--text-muted);
      max-width: 700px;
      margin: 0 auto;
    }

    /* Section 1: Hero (No Images Allowed in Hero) */
    .hero-section {
      padding: 90px 0 70px;
      background: radial-gradient(circle at 80% 20%, rgba(0, 210, 255, 0.15) 0%, transparent 40%),
                  radial-gradient(circle at 20% 80%, rgba(236, 72, 153, 0.12) 0%, transparent 40%),
                  #ffffff;
      border-bottom: 1px solid var(--border-color);
      text-align: center;
    }

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

    .hero-badge-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 18px;
      background: #eff6ff;
      border: 1px solid #bfdbfe;
      color: var(--primary);
      border-radius: 50px;
      font-size: 14px;
      font-weight: 600;
      margin-bottom: 20px;
    }

    h1.hero-h1 {
      font-size: 40px;
      font-weight: 900;
      line-height: 1.25;
      color: #0f172a;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-subtitle {
      font-size: 18px;
      color: var(--text-muted);
      margin-bottom: 35px;
      line-height: 1.7;
    }

    .hero-cta-group {
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 50px;
    }

    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 30px;
    }

    .stat-card {
      background: #f8fafc;
      padding: 20px;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      transition: transform 0.2s;
    }
    .stat-card:hover {
      transform: translateY(-4px);
    }

    .stat-num {
      font-size: 30px;
      font-weight: 900;
      color: var(--primary);
    }
    .stat-label {
      font-size: 14px;
      color: var(--text-muted);
    }

    /* Cards & Grids General */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }
    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .card-style {
      background: var(--bg-white);
      border-radius: var(--radius);
      padding: 28px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: all 0.3s;
    }
    .card-style:hover {
      box-shadow: var(--shadow-lg);
      border-color: rgba(79, 70, 229, 0.3);
      transform: translateY(-4px);
    }

    /* Vibrant Feature Card Accent Top */
    .card-vibrant-top {
      position: relative;
      overflow: hidden;
    }
    .card-vibrant-top::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 4px;
      background: linear-gradient(90deg, var(--accent-cyan), var(--primary), var(--accent-orange));
    }

    .card-icon-box {
      width: 48px;
      height: 48px;
      border-radius: 10px;
      background: linear-gradient(135deg, rgba(79, 70, 229, 0.1), rgba(0, 210, 255, 0.1));
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 22px;
      font-weight: bold;
      margin-bottom: 16px;
    }

    .card-title {
      font-size: 20px;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-main);
    }

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

    /* Section 2: Platform Intro & About */
    .about-box {
      background: #ffffff;
      border-radius: var(--radius);
      padding: 35px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    /* Section 4: Industry Solutions Tabs/Grid */
    .tag-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 15px;
    }
    .tag-item {
      padding: 6px 14px;
      background: #eef2ff;
      color: var(--primary-dark);
      font-size: 13px;
      font-weight: 600;
      border-radius: 20px;
    }

    /* Section 7: Process Steps */
    .process-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }
    .step-card {
      background: #fff;
      padding: 24px;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      position: relative;
      text-align: center;
    }
    .step-num {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: var(--primary);
      color: #fff;
      display: font-size: 16px;
      font-weight: 800;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 15px;
    }

    /* Section 9: Comparison Rating Box */
    .rating-banner {
      background: linear-gradient(135deg, #1e1b4b 0%, #312e81 100%);
      color: #ffffff;
      border-radius: var(--radius);
      padding: 40px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 30px;
      box-shadow: var(--shadow-lg);
    }
    .rating-score {
      font-size: 54px;
      font-weight: 900;
      color: #f59e0b;
      line-height: 1;
    }
    .stars {
      color: #f59e0b;
      font-size: 24px;
    }

    /* Comparison Table */
    .table-wrapper {
      overflow-x: auto;
      background: #fff;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
    }
    table.custom-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
    }
    table.custom-table th, table.custom-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
      font-size: 14px;
    }
    table.custom-table th {
      background: #f8fafc;
      font-weight: 700;
      color: var(--text-main);
    }
    table.custom-table tr:last-child td {
      border-bottom: none;
    }
    .badge-highlight {
      background: #dcfce7;
      color: #166534;
      padding: 4px 10px;
      border-radius: 12px;
      font-size: 12px;
      font-weight: 700;
    }

    /* Section 10: Requirement Matcher Widget */
    .matcher-card {
      background: linear-gradient(135deg, #eff6ff 0%, #e0e7ff 100%);
      border-radius: var(--radius);
      padding: 30px;
      border: 1px solid #c7d2fe;
    }

    /* Section 13: FAQ Accordion */
    .faq-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      overflow: hidden;
    }
    .faq-question {
      padding: 18px 24px;
      font-weight: 700;
      font-size: 16px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: #ffffff;
      user-select: none;
    }
    .faq-answer {
      padding: 0 24px 18px 24px;
      color: var(--text-muted);
      font-size: 14px;
      display: none;
      border-top: 1px dashed var(--border-color);
      padding-top: 14px;
    }
    .faq-item.active .faq-answer {
      display: block;
    }
    .faq-item.active .faq-question {
      color: var(--primary);
    }

    /* Section 15: Articles & News */
    .article-links-grid {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 20px;
    }
    .article-link-tag {
      padding: 8px 16px;
      background: #fff;
      border: 1px solid var(--border-color);
      border-radius: 6px;
      font-size: 14px;
    }

    /* Section 16: Contact Form */
    .contact-wrapper {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 35px;
      align-items: start;
    }
    .contact-info-box {
      background: #ffffff;
      padding: 30px;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
    }
    .contact-form {
      background: #ffffff;
      padding: 30px;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .form-group {
      margin-bottom: 18px;
    }
    .form-group label {
      display: block;
      font-size: 14px;
      font-weight: 600;
      margin-bottom: 6px;
    }
    .form-control {
      width: 100%;
      padding: 12px 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);
    }
    textarea.form-control {
      resize: vertical;
      min-height: 100px;
    }

    /* Section 17: Agency & Franchise Banner */
    .agency-banner {
      background: linear-gradient(135deg, #ff5722 0%, #ff7849 100%);
      color: #fff;
      border-radius: var(--radius);
      padding: 40px;
      text-align: center;
    }
    .agency-banner h2 {
      font-size: 28px;
      margin-bottom: 12px;
    }

    /* Media Library Display Standard */
    .media-img-responsive {
      max-width: 100%;
      height: auto;
      border-radius: var(--radius);
      display: block;
    }

    /* Footer Safety Color Override */
    footer.ai-footer {
      background: #0f172a !important;
      color: #94a3b8 !important;
      padding: 60px 0 30px;
      border-top: 1px solid #1e293b;
    }
    footer.ai-footer a {
      color: #cbd5e1 !important;
    }
    footer.ai-footer a:hover {
      color: var(--accent-cyan) !important;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 30px;
      margin-bottom: 40px;
    }
    .footer-col h4 {
      color: #ffffff !important;
      font-size: 16px;
      margin-bottom: 16px;
    }
    .friendship-links-box {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 15px;
    }
    .footer-bottom {
      border-top: 1px solid #1e293b;
      padding-top: 25px;
      text-align: center;
      font-size: 13px;
    }

    /* Floating Widget */
    .floating-kefu {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: 30px;
      padding: 8px 16px;
      box-shadow: 0 8px 24px rgba(0,0,0,0.12);
      display: flex;
      align-items: center;
      gap: 8px;
      font-weight: 600;
      font-size: 14px;
    }

    /* Responsive */
    @media (max-width: 992px) {
      .grid-3, .grid-4, .hero-stats-grid, .process-steps, .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .contact-wrapper {
        grid-template-columns: 1fr;
      }
    }
    @media (max-width: 768px) {
      .mobile-menu-toggle {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        padding: 15px 0;
        border-bottom: 1px solid var(--border-color);
      }
      .nav-links.show {
        display: flex;
      }
      .grid-2, .grid-3, .grid-4, .hero-stats-grid, .process-steps, .footer-grid {
        grid-template-columns: 1fr;
      }
      h1.hero-h1 {
        font-size: 28px;
      }
      .rating-banner {
        flex-direction: column;
        text-align: center;
        gap: 20px;
      }
    }