/* ----------------------------------------------------
       Theme: Enterprise Mint Green Fresh (春绿薄荷清新风)
       Color Palette:
       - Primary: #059669 (Emerald Green)
       - Accent: #10b981 (Mint Green)
       - Light Background: #f0fdf4 / #f8fafc / #ffffff
       - Dark Text: #0f172a / #1e293b / #334155
       - Border/Card: #e2e8f0 / #d1fae5
    ---------------------------------------------------- */
    :root {
      --primary: #059669;
      --primary-hover: #047857;
      --mint-light: #ecfdf5;
      --mint-accent: #10b981;
      --mint-soft: #d1fae5;
      --text-main: #0f172a;
      --text-muted: #475569;
      --bg-main: #f8fafc;
      --bg-card: #ffffff;
      --border-color: #e2e8f0;
      --shadow-sm: 0 2px 4px rgba(5, 150, 105, 0.05);
      --shadow-md: 0 4px 12px rgba(5, 150, 105, 0.08);
      --shadow-lg: 0 12px 28px rgba(5, 150, 105, 0.12);
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 20px;
      --container-max: 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-main);
      color: var(--text-main);
      line-height: 1.6;
    }

    body {
      overflow-x: hidden;
      background: linear-gradient(180deg, #f0fdf4 0%, #f8fafc 400px, #f8fafc 100%);
    }

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

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

    /* Section Header Base */
    .section-head {
      text-align: center;
      margin-bottom: 40px;
    }
    .section-tag {
      display: inline-block;
      padding: 4px 14px;
      background-color: var(--mint-soft);
      color: var(--primary);
      font-size: 13px;
      font-weight: 600;
      border-radius: 20px;
      margin-bottom: 10px;
    }
    .section-title {
      font-size: 28px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
    }
    .section-desc {
      font-size: 15px;
      color: var(--text-muted);
      max-width: 700px;
      margin: 0 auto;
    }

    /* Header & Navigation */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid rgba(209, 250, 229, 0.8);
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 70px;
    }
    .brand-logo-wrap {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .ai-page-logo {
      height: 38px;
      width: auto;
      display: block;
    }
    .brand-name {
      font-size: 20px;
      font-weight: 800;
      color: var(--primary);
      letter-spacing: -0.5px;
    }

    /* Navigation Rule strictly enforced: gap: 0 */
    .nav-links {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 0;
    }
    .nav-links li a {
      padding: 8px 12px;
      font-size: 14px;
      font-weight: 500;
      color: var(--text-main);
      border-radius: var(--radius-sm);
      display: inline-block;
    }
    .nav-links li a:hover {
      color: var(--primary);
      background-color: var(--mint-light);
    }

    .header-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn-nav-primary {
      background: var(--primary);
      color: #ffffff !important;
      padding: 8px 18px;
      border-radius: 30px;
      font-size: 14px;
      font-weight: 600;
      box-shadow: 0 4px 10px rgba(5, 150, 105, 0.25);
    }
    .btn-nav-primary:hover {
      background: var(--primary-hover);
      transform: translateY(-1px);
    }
    .nav-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      color: var(--text-main);
      cursor: pointer;
    }

    /* Hero Section - NO IMAGES HERE */
    .hero-section {
      padding: 80px 0 60px 0;
      text-align: center;
      background: radial-gradient(circle at 50% 20%, #d1fae5 0%, #f0fdf4 40%, #f8fafc 100%);
      position: relative;
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 18px;
      border-radius: 30px;
      background: #ffffff;
      border: 1px solid #a7f3d0;
      font-size: 13px;
      color: var(--primary);
      font-weight: 600;
      box-shadow: var(--shadow-sm);
      margin-bottom: 24px;
    }
    .hero-h1 {
      font-size: 42px;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.25;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }
    .hero-sub {
      font-size: 18px;
      color: var(--text-muted);
      max-width: 820px;
      margin: 0 auto 32px auto;
    }
    .hero-cta-group {
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 48px;
    }
    .btn-hero-main {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: linear-gradient(135deg, #10b981 0%, #059669 100%);
      color: #ffffff !important;
      font-size: 16px;
      font-weight: 700;
      padding: 14px 34px;
      border-radius: 40px;
      box-shadow: 0 8px 20px rgba(5, 150, 105, 0.3);
      transition: all 0.3s ease;
    }
    .btn-hero-main:hover {
      transform: translateY(-2px);
      box-shadow: 0 12px 24px rgba(5, 150, 105, 0.4);
    }
    .btn-hero-sub {
      background: #ffffff;
      color: var(--text-main) !important;
      border: 1px solid var(--border-color);
      font-size: 15px;
      font-weight: 600;
      padding: 14px 28px;
      border-radius: 40px;
    }
    .btn-hero-sub:hover {
      border-color: var(--primary);
      color: var(--primary) !important;
      background: var(--mint-light);
    }

    /* Model Badges Grid */
    .model-tags-wrapper {
      max-width: 960px;
      margin: 0 auto;
      background: rgba(255, 255, 255, 0.7);
      border: 1px solid #d1fae5;
      padding: 16px 20px;
      border-radius: var(--radius-md);
      backdrop-filter: blur(5px);
    }
    .model-tags-title {
      font-size: 12px;
      text-transform: uppercase;
      letter-spacing: 1px;
      color: var(--text-muted);
      margin-bottom: 10px;
      font-weight: 700;
    }
    .model-chips {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      justify-content: center;
    }
    .chip {
      background: #ffffff;
      border: 1px solid #e2e8f0;
      padding: 3px 10px;
      border-radius: 12px;
      font-size: 12px;
      color: #334155;
      font-weight: 500;
    }

    /* Section Base Style */
    .page-section {
      padding: 70px 0;
      border-bottom: 1px solid #edf2f7;
    }
    .bg-white {
      background-color: #ffffff;
    }
    .bg-soft {
      background-color: var(--mint-light);
    }

    /* Data Stats Metrics Cards */
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .stat-card {
      background: #ffffff;
      padding: 24px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      text-align: center;
      box-shadow: var(--shadow-sm);
    }
    .stat-num {
      font-size: 32px;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 4px;
    }
    .stat-label {
      font-size: 14px;
      color: var(--text-muted);
    }

    /* Feature Grid (AIGC Services) */
    .feature-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .feature-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      padding: 28px;
      border-radius: var(--radius-md);
      transition: all 0.3s ease;
      position: relative;
    }
    .feature-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: var(--mint-accent);
    }
    .feature-icon {
      width: 48px;
      height: 48px;
      background: var(--mint-light);
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 22px;
      color: var(--primary);
      margin-bottom: 16px;
    }
    .feature-title {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 8px;
      color: var(--text-main);
    }
    .feature-desc {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* Custom Media Images Styling */
    .ai-page-image {
      max-width: 100%;
      height: auto;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
      display: block;
    }
    .media-gallery-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
      margin-top: 30px;
    }

    /* Workflow Steps */
    .steps-wrapper {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }
    .step-card {
      background: #ffffff;
      padding: 24px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      position: relative;
    }
    .step-number {
      font-size: 24px;
      font-weight: 900;
      color: var(--mint-accent);
      margin-bottom: 8px;
    }
    .step-title {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 6px;
    }
    .step-desc {
      font-size: 13px;
      color: var(--text-muted);
    }

    /* Comparison Table Section */
    .compare-box {
      background: #ffffff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      overflow-x: auto;
      box-shadow: var(--shadow-sm);
    }
    .compare-score-badge {
      background: linear-gradient(135deg, #059669 0%, #10b981 100%);
      color: #ffffff;
      padding: 20px;
      border-radius: var(--radius-md) var(--radius-md) 0 0;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .score-big {
      font-size: 32px;
      font-weight: 900;
    }
    .stars {
      color: #fbbf24;
      font-size: 20px;
    }
    .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-color: #f8fafc;
      color: var(--text-main);
      font-weight: 700;
    }
    .compare-table tr:hover {
      background-color: var(--mint-light);
    }
    .tag-highlight {
      color: var(--primary);
      font-weight: 700;
    }

    /* Token Price Table */
    .token-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }
    .token-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
    }
    .token-card.featured {
      border: 2px solid var(--mint-accent);
      background: linear-gradient(180deg, #ffffff 0%, #f0fdf4 100%);
    }
    .token-model-name {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 10px;
    }
    .token-price {
      font-size: 26px;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 16px;
    }
    .token-price span {
      font-size: 13px;
      color: var(--text-muted);
      font-weight: 400;
    }

    /* Reviews Grid */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }
    .review-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 24px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
    }
    .review-header {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 12px;
    }
    .avatar-placeholder {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--mint-soft);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 16px;
    }
    .reviewer-info h4 {
      font-size: 15px;
      font-weight: 700;
    }
    .reviewer-info p {
      font-size: 12px;
      color: var(--text-muted);
    }
    .review-text {
      font-size: 14px;
      color: #334155;
      line-height: 1.6;
    }

    /* FAQ Accordion */
    .faq-list {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
    }
    .faq-question {
      width: 100%;
      text-align: left;
      padding: 18px 24px;
      background: none;
      border: none;
      font-size: 16px;
      font-weight: 600;
      color: var(--text-main);
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
    }
    .faq-question:hover {
      background-color: var(--mint-light);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      padding: 0 24px;
      font-size: 14px;
      color: var(--text-muted);
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
      padding: 0 24px 18px 24px;
    }
    .faq-icon {
      font-size: 18px;
      transition: transform 0.3s;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }

    /* Form Section */
    .contact-wrapper {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: start;
    }
    .form-card {
      background: #ffffff;
      padding: 32px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .form-group {
      margin-bottom: 20px;
    }
    .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: var(--radius-sm);
      font-size: 14px;
      outline: none;
      transition: border-color 0.2s;
    }
    .form-control:focus {
      border-color: var(--mint-accent);
    }
    textarea.form-control {
      min-height: 100px;
      resize: vertical;
    }
    .btn-submit {
      width: 100%;
      background: var(--primary);
      color: #ffffff;
      font-size: 16px;
      font-weight: 700;
      padding: 14px;
      border: none;
      border-radius: var(--radius-sm);
      cursor: pointer;
      transition: background 0.2s;
    }
    .btn-submit:hover {
      background: var(--primary-hover);
    }

    .contact-info-card {
      background: var(--mint-light);
      padding: 32px;
      border-radius: var(--radius-md);
      border: 1px solid var(--mint-soft);
    }
    .contact-item {
      margin-bottom: 18px;
      font-size: 15px;
    }
    .contact-item strong {
      display: block;
      color: var(--text-main);
      font-size: 13px;
      margin-bottom: 2px;
    }
    .qr-box {
      margin-top: 20px;
      text-align: center;
    }
    .qr-box img {
      max-width: 140px;
      border-radius: var(--radius-sm);
      border: 2px solid #ffffff;
      box-shadow: var(--shadow-sm);
    }

    /* Partner & Agency Banner */
    .agency-banner {
      background: linear-gradient(135deg, #059669 0%, #10b981 100%);
      color: #ffffff;
      border-radius: var(--radius-lg);
      padding: 40px;
      text-align: center;
      margin-top: 40px;
    }
    .agency-banner h3 {
      font-size: 26px;
      margin-bottom: 12px;
    }
    .agency-banner p {
      font-size: 16px;
      opacity: 0.9;
      margin-bottom: 24px;
    }

    /* Footer Layout - Strict visual alignment & colors */
    .site-footer {
      background-color: #0f172a;
      color: #94a3b8;
      padding: 60px 0 30px 0;
      border-top: 1px solid #1e293b;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 40px;
      margin-bottom: 40px;
    }
    .footer-col h4 {
      color: #ffffff;
      font-size: 16px;
      margin-bottom: 16px;
    }
    .footer-links {
      list-style: none;
    }
    .footer-links li {
      margin-bottom: 8px;
    }
    .footer-links a {
      color: #94a3b8;
      font-size: 14px;
    }
    .footer-links a:hover {
      color: #ffffff;
    }
    .friend-links-box {
      margin-top: 30px;
      padding-top: 20px;
      border-top: 1px solid #1e293b;
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      font-size: 13px;
    }
    .friend-links-box a {
      color: #64748b;
    }
    .friend-links-box a:hover {
      color: var(--mint-accent);
    }
    .footer-bottom {
      text-align: center;
      padding-top: 24px;
      border-top: 1px solid #1e293b;
      font-size: 13px;
      color: #64748b;
    }

    /* Floating Customer Service Button */
    .floating-widget {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .float-btn {
      width: 50px;
      height: 50px;
      background: var(--primary);
      color: #ffffff;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      box-shadow: 0 4px 14px rgba(5, 150, 105, 0.4);
      cursor: pointer;
      transition: transform 0.2s;
    }
    .float-btn:hover {
      transform: scale(1.1);
    }

    /* Article List Styling */
    .article-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .article-item {
      padding: 12px 16px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    /* Responsive Adaptation */
    @media (max-width: 992px) {
      .feature-grid, .steps-wrapper, .token-grid, .reviews-grid, .stats-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .contact-wrapper {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .hero-h1 {
        font-size: 28px;
      }
      .hero-sub {
        font-size: 15px;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        padding: 20px;
        box-shadow: var(--shadow-md);
        border-bottom: 1px solid var(--border-color);
      }
      .nav-links.show {
        display: flex;
      }
      .nav-toggle {
        display: block;
      }
      .feature-grid, .steps-wrapper, .token-grid, .reviews-grid, .stats-grid, .media-gallery-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }