:root {
      --primary: #5822e8;
      --primary-hover: #4515c7;
      --accent-pink: #ff2d87;
      --accent-yellow: #ffb800;
      --accent-cyan: #00e5ff;
      --bg-light: #faf9fd;
      --bg-card: #ffffff;
      --text-main: #141226;
      --text-muted: #5e5a75;
      --border-color: #eae6f5;
      --border-focus: #5822e8;
      --shadow-sm: 0 4px 12px rgba(88, 34, 232, 0.05);
      --shadow-md: 0 10px 25px rgba(88, 34, 232, 0.08);
      --shadow-hover: 0 16px 36px rgba(88, 34, 232, 0.15);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 22px;
      --max-width: 1200px;
    }

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

    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }

    body {
      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;
      overflow-x: hidden;
      background-image: 
        radial-gradient(circle at 10% 10%, rgba(255, 45, 135, 0.04) 0%, transparent 40%),
        radial-gradient(circle at 90% 30%, rgba(88, 34, 232, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 50% 80%, rgba(0, 229, 255, 0.04) 0%, transparent 45%);
      background-attachment: fixed;
    }

    .container {
      width: 100%;
      max-width: var(--max-width);
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      transition: all 0.3s ease;
    }

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

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

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

    .brand-text {
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--primary);
      letter-spacing: -0.5px;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
    }

    .nav-links li a {
      display: inline-block;
      padding: 8px 14px;
      color: var(--text-main);
      font-weight: 600;
      font-size: 0.95rem;
      text-decoration: none;
      transition: color 0.2s ease;
      position: relative;
    }

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

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 0.95rem;
      font-weight: 700;
      border-radius: var(--radius-md);
      text-decoration: none;
      transition: all 0.25s ease;
      cursor: pointer;
      border: none;
      outline: none;
      text-align: center;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--primary) 0%, #7645f5 100%);
      color: #ffffff;
      box-shadow: 0 4px 14px rgba(88, 34, 232, 0.3);
    }

    .btn-primary:hover {
      background: linear-gradient(135deg, var(--primary-hover) 0%, #6332eb 100%);
      box-shadow: 0 6px 20px rgba(88, 34, 232, 0.4);
      transform: translateY(-2px);
      color: #ffffff;
    }

    .btn-accent {
      background: linear-gradient(135deg, var(--accent-pink) 0%, #ff529f 100%);
      color: #ffffff;
      box-shadow: 0 4px 14px rgba(255, 45, 135, 0.3);
    }

    .btn-accent:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(255, 45, 135, 0.4);
      color: #ffffff;
    }

    .btn-outline {
      background: #ffffff;
      color: var(--primary);
      border: 2px solid var(--primary);
    }

    .btn-outline:hover {
      background: rgba(88, 34, 232, 0.05);
      transform: translateY(-2px);
    }

    .nav-toggle {
      display: none;
      flex-direction: column;
      justify-content: space-between;
      width: 28px;
      height: 20px;
      background: transparent;
      border: none;
      cursor: pointer;
    }

    .nav-toggle span {
      width: 100%;
      height: 3px;
      background: var(--text-main);
      border-radius: 2px;
      transition: 0.3s;
    }

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

    .section-header {
      text-align: center;
      max-width: 780px;
      margin: 0 auto 50px auto;
    }

    .section-badge {
      display: inline-block;
      padding: 6px 16px;
      font-size: 0.85rem;
      font-weight: 700;
      color: var(--primary);
      background: rgba(88, 34, 232, 0.08);
      border: 1px solid rgba(88, 34, 232, 0.15);
      border-radius: 30px;
      margin-bottom: 14px;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }

    .section-title {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.3;
      margin-bottom: 16px;
    }

    .section-subtitle {
      font-size: 1.05rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* Hero Section (No images) */
    .hero-section {
      padding: 80px 0 60px 0;
      background: linear-gradient(180deg, rgba(88, 34, 232, 0.03) 0%, rgba(255, 45, 135, 0.02) 100%);
      border-bottom: 1px solid var(--border-color);
    }

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

    .hero-badge-wrap {
      display: flex;
      justify-content: center;
      gap: 10px;
      margin-bottom: 24px;
      flex-wrap: wrap;
    }

    .hero-pill {
      display: inline-flex;
      align-items: center;
      padding: 6px 14px;
      border-radius: 20px;
      font-size: 0.85rem;
      font-weight: 700;
      background: #ffffff;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      color: var(--text-main);
    }

    .hero-pill-highlight {
      background: var(--accent-yellow);
      color: #000000;
      border: none;
    }

    .hero-title {
      font-size: 2.8rem;
      font-weight: 900;
      color: var(--text-main);
      line-height: 1.25;
      margin-bottom: 24px;
      letter-spacing: -0.5px;
    }

    .hero-title span {
      color: var(--primary);
      position: relative;
    }

    .hero-desc {
      font-size: 1.15rem;
      color: var(--text-muted);
      max-width: 760px;
      margin: 0 auto 36px auto;
      line-height: 1.7;
    }

    .hero-cta-group {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      margin-bottom: 48px;
      flex-wrap: wrap;
    }

    .hero-cta-group .btn-lg {
      padding: 14px 34px;
      font-size: 1.1rem;
    }

    .hero-stats {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      padding: 24px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-md);
    }

    .stat-item {
      text-align: center;
      border-right: 1px solid var(--border-color);
    }

    .stat-item:last-child {
      border-right: none;
    }

    .stat-val {
      font-size: 2rem;
      font-weight: 900;
      color: var(--primary);
      line-height: 1.1;
      margin-bottom: 6px;
    }

    .stat-label {
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--text-muted);
    }

    /* Model Cloud Banner */
    .model-strip {
      background: #ffffff;
      border-bottom: 1px solid var(--border-color);
      padding: 20px 0;
      overflow: hidden;
    }

    .model-tags-wrapper {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
    }

    .model-tag {
      padding: 6px 14px;
      background: var(--bg-light);
      border: 1px solid var(--border-color);
      border-radius: 8px;
      font-size: 0.85rem;
      font-weight: 700;
      color: var(--text-main);
      transition: all 0.2s ease;
    }

    .model-tag:hover {
      border-color: var(--primary);
      background: rgba(88, 34, 232, 0.05);
      color: var(--primary);
    }

    /* Grid & Cards */
    .card-grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .card-grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .card-grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }

    .feature-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .feature-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(88, 34, 232, 0.3);
    }

    .card-icon {
      width: 52px;
      height: 52px;
      border-radius: 12px;
      background: rgba(88, 34, 232, 0.08);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.5rem;
      font-weight: 900;
      margin-bottom: 20px;
    }

    .feature-card h3 {
      font-size: 1.25rem;
      font-weight: 800;
      margin-bottom: 12px;
      color: var(--text-main);
    }

    .feature-card p {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* Process Flow */
    .process-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }

    .step-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      position: relative;
      box-shadow: var(--shadow-sm);
    }

    .step-num {
      width: 36px;
      height: 36px;
      background: var(--primary);
      color: #ffffff;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 1rem;
      margin-bottom: 16px;
    }

    .step-item h4 {
      font-size: 1.15rem;
      font-weight: 800;
      margin-bottom: 10px;
      color: var(--text-main);
    }

    .step-item p {
      font-size: 0.9rem;
      color: var(--text-muted);
    }

    /* Comparison Table */
    .table-container {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-md);
      overflow-x: auto;
      padding: 10px;
    }

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

    .compare-table th, .compare-table td {
      padding: 18px 20px;
      border-bottom: 1px solid var(--border-color);
    }

    .compare-table th {
      background: var(--bg-light);
      font-size: 1rem;
      font-weight: 800;
      color: var(--text-main);
    }

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

    .col-highlight {
      background: rgba(88, 34, 232, 0.03);
      color: var(--primary);
      font-weight: 700;
    }

    .score-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 4px 12px;
      background: var(--accent-yellow);
      color: #000000;
      border-radius: 20px;
      font-weight: 800;
      font-size: 0.9rem;
    }

    /* Media Visual Gallery */
    .media-gallery-grid {
      display: grid;
      grid-template-columns: 2fr 1fr;
      gap: 20px;
    }

    .media-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }

    .media-img-wrap {
      width: 100%;
      overflow: hidden;
      background: #f0edf8;
    }

    .media-img-wrap img {
      width: 100%;
      height: auto;
      display: block;
      transition: transform 0.4s ease;
    }

    .media-card:hover .media-img-wrap img {
      transform: scale(1.02);
    }

    .media-body {
      padding: 20px;
    }

    .media-body h4 {
      font-size: 1.15rem;
      font-weight: 800;
      margin-bottom: 8px;
    }

    .media-body p {
      font-size: 0.9rem;
      color: var(--text-muted);
    }

    /* FAQ Accordion */
    .faq-wrapper {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: border-color 0.2s ease;
    }

    .faq-item.active {
      border-color: var(--primary);
    }

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

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

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

    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }

    .faq-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      padding: 0 24px;
      color: var(--text-muted);
      font-size: 0.95rem;
      line-height: 1.6;
    }

    .faq-item.active .faq-content {
      padding-bottom: 20px;
    }

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

    .review-text {
      font-size: 0.95rem;
      color: var(--text-muted);
      margin-bottom: 20px;
      line-height: 1.6;
      font-style: italic;
    }

    .review-user {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--border-color);
      padding-top: 16px;
    }

    .user-avatar-badge {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary) 0%, var(--accent-pink) 100%);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 1rem;
    }

    .user-info h5 {
      font-size: 0.95rem;
      font-weight: 800;
      color: var(--text-main);
    }

    .user-info p {
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    /* Articles Section */
    .article-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-sm);
    }

    .article-links-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
      margin-top: 16px;
    }

    .article-item-link {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 12px 16px;
      background: var(--bg-light);
      border-radius: var(--radius-sm);
      color: var(--text-main);
      text-decoration: none;
      font-weight: 600;
      font-size: 0.95rem;
      transition: all 0.2s ease;
    }

    .article-item-link:hover {
      background: rgba(88, 34, 232, 0.08);
      color: var(--primary);
      transform: translateX(4px);
    }

    /* Contact & Form */
    .contact-wrapper {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 36px;
      align-items: start;
    }

    .contact-info-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: var(--shadow-md);
    }

    .contact-item {
      display: flex;
      align-items: flex-start;
      gap: 16px;
      margin-bottom: 24px;
    }

    .contact-item-icon {
      width: 40px;
      height: 40px;
      border-radius: 10px;
      background: rgba(88, 34, 232, 0.08);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.1rem;
      font-weight: 800;
      flex-shrink: 0;
    }

    .contact-item-text h5 {
      font-size: 1rem;
      font-weight: 800;
      margin-bottom: 4px;
    }

    .contact-item-text p {
      font-size: 0.9rem;
      color: var(--text-muted);
    }

    .qr-container {
      text-align: center;
      padding: 20px;
      background: var(--bg-light);
      border-radius: var(--radius-md);
      margin-top: 20px;
      border: 1px solid var(--border-color);
    }

    .qr-container img {
      max-width: 140px;
      height: auto;
      border-radius: 8px;
      margin-bottom: 8px;
      display: inline-block;
    }

    .form-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: var(--shadow-md);
    }

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

    .form-label {
      display: block;
      font-size: 0.9rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      font-size: 0.95rem;
      color: var(--text-main);
      background: var(--bg-light);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      outline: none;
      transition: border-color 0.2s ease, box-shadow 0.2s ease;
    }

    .form-control:focus {
      border-color: var(--border-focus);
      background: #ffffff;
      box-shadow: 0 0 0 3px rgba(88, 34, 232, 0.1);
    }

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

    /* Partner & Agency */
    .partner-banner {
      background: linear-gradient(135deg, #2b116d 0%, #150936 100%);
      color: #ffffff;
      border-radius: var(--radius-lg);
      padding: 50px 40px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 30px;
      box-shadow: var(--shadow-md);
    }

    .partner-banner h3 {
      font-size: 1.8rem;
      font-weight: 900;
      margin-bottom: 12px;
      color: #ffffff;
    }

    .partner-banner p {
      font-size: 1rem;
      color: #d1c8ea;
      max-width: 600px;
      line-height: 1.6;
    }

    /* Footer */
    footer {
      background: #110d21;
      color: #a7a2bc;
      padding: 60px 0 30px 0;
      border-top: 1px solid #231d3d;
    }

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

    .footer-col h4 {
      color: #ffffff;
      font-size: 1.05rem;
      font-weight: 800;
      margin-bottom: 20px;
      letter-spacing: 0.5px;
    }

    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .footer-links a {
      color: #a7a2bc;
      text-decoration: none;
      font-size: 0.9rem;
      transition: color 0.2s ease;
    }

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

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

    .footer-friend-links a {
      color: #8c86a8;
      text-decoration: none;
      font-size: 0.85rem;
      background: rgba(255, 255, 255, 0.05);
      padding: 4px 10px;
      border-radius: 4px;
      transition: all 0.2s ease;
    }

    .footer-friend-links a:hover {
      color: #ffffff;
      background: rgba(255, 255, 255, 0.12);
    }

    .footer-bottom {
      text-align: center;
      padding-top: 30px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      font-size: 0.85rem;
      color: #797491;
    }

    .footer-bottom a {
      color: #9d98b8;
      text-decoration: none;
    }

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

    .kefu-btn {
      width: 50px;
      height: 50px;
      background: linear-gradient(135deg, var(--accent-pink) 0%, var(--primary) 100%);
      color: #ffffff;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
      text-decoration: none;
      font-weight: 800;
      font-size: 0.85rem;
      cursor: pointer;
      border: none;
      transition: transform 0.3s ease;
    }

    .kefu-btn:hover {
      transform: scale(1.08);
    }

    .back-top {
      width: 44px;
      height: 44px;
      background: #ffffff;
      color: var(--text-main);
      border: 1px solid var(--border-color);
      border-radius: 50%;
      display: none;
      align-items: center;
      justify-content: center;
      box-shadow: var(--shadow-sm);
      cursor: pointer;
      font-weight: 900;
      font-size: 1rem;
      transition: all 0.2s ease;
    }

    .back-top:hover {
      color: var(--primary);
      border-color: var(--primary);
    }

    /* Responsive */
    @media (max-width: 992px) {
      .card-grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }
      .card-grid-3 {
        grid-template-columns: repeat(2, 1fr);
      }
      .process-steps {
        grid-template-columns: repeat(2, 1fr);
      }
      .hero-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
      }
      .stat-item {
        border-right: none;
      }
      .contact-wrapper {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .partner-banner {
        flex-direction: column;
        text-align: center;
      }
      .media-gallery-grid {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .nav-toggle {
        display: flex;
      }
      .nav-links {
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        padding: 20px;
        border-bottom: 1px solid var(--border-color);
        display: none;
        box-shadow: var(--shadow-md);
      }
      .nav-links.show {
        display: flex;
      }
      .nav-links li {
        width: 100%;
        text-align: center;
      }
      .nav-links li a {
        display: block;
        padding: 12px;
      }
      .hero-title {
        font-size: 2.1rem;
      }
      .card-grid-3, .card-grid-4, .card-grid-2 {
        grid-template-columns: 1fr;
      }
      .process-steps {
        grid-template-columns: 1fr;
      }
      .hero-stats {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .section-title {
        font-size: 1.75rem;
      }
    }