:root {
      --primary: #e6005c;
      --primary-hover: #cc0052;
      --primary-light: #fff0f5;
      --secondary: #ff3377;
      --accent: #ff6b8b;
      --text-main: #1f2937;
      --text-muted: #4b5563;
      --text-light: #6b7280;
      --bg-page: #fdfafb;
      --bg-white: #ffffff;
      --bg-card: #ffffff;
      --border-color: #fce7ef;
      --border-focus: #f43f5e;
      --shadow-sm: 0 2px 8px rgba(230, 0, 92, 0.04);
      --shadow-md: 0 8px 24px rgba(230, 0, 92, 0.08);
      --shadow-lg: 0 16px 36px rgba(230, 0, 92, 0.12);
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 20px;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      -webkit-tap-highlight-color: transparent;
    }

    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-page);
      color: var(--text-main);
      line-height: 1.6;
      overflow-x: hidden;
    }

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

    a {
      color: inherit;
      text-decoration: none;
      transition: color 0.2s ease, opacity 0.2s ease;
    }

    ul, ol {
      list-style: none;
    }

    .section {
      padding: 70px 0;
      position: relative;
    }

    .section-alt {
      background-color: #fff6f9;
    }

    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 48px auto;
    }

    .section-badge {
      display: inline-block;
      padding: 4px 14px;
      background: var(--primary-light);
      color: var(--primary);
      border-radius: 20px;
      font-size: 0.875rem;
      font-weight: 600;
      margin-bottom: 12px;
      border: 1px solid var(--border-color);
    }

    .section-title {
      font-size: 2.1rem;
      font-weight: 700;
      color: #111827;
      line-height: 1.3;
      margin-bottom: 16px;
    }

    .section-desc {
      font-size: 1rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* Header */
    .site-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);
    }

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

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

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

    .nav-menu {
      display: flex;
      align-items: center;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
    }

    .nav-links li a {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-main);
      padding: 8px 14px;
      border-radius: var(--radius-sm);
      display: inline-block;
    }

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

    .nav-btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 9px 20px;
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      color: #ffffff !important;
      font-size: 0.9rem;
      font-weight: 600;
      border-radius: 30px;
      box-shadow: 0 4px 14px rgba(230, 0, 92, 0.25);
      margin-left: 12px;
    }

    .nav-btn:hover {
      opacity: 0.95;
      transform: translateY(-1px);
    }

    .menu-toggle {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 8px;
    }

    .menu-toggle span {
      display: block;
      width: 24px;
      height: 2px;
      background-color: var(--text-main);
      margin: 5px 0;
      transition: all 0.3s ease;
    }

    /* Hero Section (No Images Allowed) */
    .hero-section {
      padding: 80px 0 60px 0;
      background: radial-gradient(circle at 50% 20%, #ffe6f0 0%, #ffffff 70%);
      position: relative;
      overflow: hidden;
    }

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

    .hero-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      background: #fff;
      border: 1px solid var(--border-color);
      border-radius: 30px;
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--primary);
      box-shadow: var(--shadow-sm);
      margin-bottom: 24px;
    }

    .hero-title {
      font-size: 2.8rem;
      font-weight: 800;
      line-height: 1.25;
      color: #111827;
      margin-bottom: 24px;
      letter-spacing: -0.5px;
    }

    .hero-title span {
      color: var(--primary);
      background: linear-gradient(135deg, #e6005c, #ff4081);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-desc {
      font-size: 1.15rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 36px;
      max-width: 780px;
      margin-left: auto;
      margin-right: auto;
    }

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

    .btn-primary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 14px 34px;
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      color: #ffffff;
      font-size: 1.05rem;
      font-weight: 600;
      border-radius: 30px;
      box-shadow: 0 6px 20px rgba(230, 0, 92, 0.3);
      transition: all 0.25s ease;
      border: none;
      cursor: pointer;
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 25px rgba(230, 0, 92, 0.4);
    }

    .btn-outline {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 14px 30px;
      background: #ffffff;
      color: var(--primary);
      font-size: 1.05rem;
      font-weight: 600;
      border-radius: 30px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: all 0.25s ease;
    }

    .btn-outline:hover {
      background: var(--primary-light);
      border-color: var(--accent);
      transform: translateY(-2px);
    }

    .hero-highlights {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin-top: 10px;
    }

    .highlight-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 20px;
      box-shadow: var(--shadow-sm);
      text-align: left;
    }

    .highlight-card h4 {
      font-size: 1.1rem;
      color: var(--primary);
      margin-bottom: 6px;
      font-weight: 700;
    }

    .highlight-card p {
      font-size: 0.85rem;
      color: var(--text-light);
      line-height: 1.4;
    }

    /* Grid Layouts */
    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }

    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 30px;
    }

    /* Cards */
    .feature-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      transition: transform 0.25s ease, box-shadow 0.25s ease;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

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

    .feature-icon {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.25rem;
      font-weight: bold;
      margin-bottom: 18px;
    }

    .feature-title {
      font-size: 1.2rem;
      font-weight: 700;
      color: #111827;
      margin-bottom: 10px;
    }

    .feature-desc {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* Platform Showcase */
    .platform-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: var(--shadow-md);
    }

    .model-tags-container {
      margin-top: 24px;
    }

    .tag-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 14px;
    }

    .tag-item {
      padding: 8px 16px;
      background: #fff;
      border: 1px solid var(--border-color);
      border-radius: 20px;
      font-size: 0.85rem;
      font-weight: 600;
      color: #374151;
      box-shadow: 0 1px 3px rgba(0,0,0,0.02);
      transition: all 0.2s ease;
    }

    .tag-item:hover {
      background: var(--primary);
      color: #fff;
      border-color: var(--primary);
    }

    /* Process Flow */
    .step-grid {
      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;
      text-align: center;
    }

    .step-number {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: var(--primary);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1.1rem;
      margin: 0 auto 16px auto;
    }

    .step-title {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .step-desc {
      font-size: 0.85rem;
      color: var(--text-light);
      line-height: 1.5;
    }

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

    .custom-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 0.95rem;
    }

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

    .custom-table th {
      background-color: var(--primary-light);
      color: #111827;
      font-weight: 700;
    }

    .custom-table tr:hover td {
      background-color: #fff9fb;
    }

    .badge-score {
      display: inline-block;
      padding: 4px 10px;
      background: #ffe4e6;
      color: #be123c;
      font-weight: 700;
      border-radius: 6px;
      font-size: 0.85rem;
    }

    /* Media Area */
    .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%;
      aspect-ratio: 16/9;
      background: #f3f4f6;
      overflow: hidden;
    }

    .media-img-wrap.square {
      aspect-ratio: 1/1;
    }

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

    .media-card:hover .media-img-wrap img {
      transform: scale(1.03);
    }

    .media-info {
      padding: 20px;
    }

    .media-title {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 6px;
    }

    .media-desc {
      font-size: 0.85rem;
      color: var(--text-light);
    }

    /* FAQ Component */
    .faq-list {
      max-width: 860px;
      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;
    }

    .faq-header {
      padding: 18px 24px;
      font-weight: 600;
      font-size: 1.05rem;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      user-select: none;
      transition: background-color 0.2s ease;
    }

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

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

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

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

    .faq-item.active .faq-body {
      padding: 16px 24px 24px 24px;
      max-height: 200px;
      border-top: 1px solid var(--border-color);
    }

    /* Reviews Component */
    .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-user {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-top: 18px;
    }

    .review-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1rem;
    }

    .review-meta h5 {
      font-size: 0.95rem;
      color: #111827;
      margin-bottom: 2px;
    }

    .review-meta p {
      font-size: 0.8rem;
      color: var(--text-light);
    }

    .review-text {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
      font-style: italic;
    }

    /* Form Section */
    .form-wrapper {
      max-width: 680px;
      margin: 0 auto;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-md);
    }

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

    .form-label {
      display: block;
      font-size: 0.9rem;
      font-weight: 600;
      color: #374151;
      margin-bottom: 8px;
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid #d1d5db;
      border-radius: var(--radius-sm);
      font-size: 0.95rem;
      color: var(--text-main);
      background: #fdfdfd;
      transition: border-color 0.2s ease, box-shadow 0.2s ease;
      outline: none;
    }

    .form-control:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(230, 0, 92, 0.15);
      background: #ffffff;
    }

    textarea.form-control {
      resize: vertical;
      min-height: 120px;
    }

    /* Article List */
    .article-links-wrap {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
    }

    .article-pill {
      display: inline-flex;
      align-items: center;
      padding: 8px 16px;
      background: var(--primary-light);
      border-radius: 20px;
      font-size: 0.85rem;
      font-weight: 500;
      color: var(--primary);
      border: 1px solid var(--border-color);
    }

    .article-pill:hover {
      background: var(--primary);
      color: #ffffff;
    }

    /* Footer */
    .site-footer {
      background-color: #111827;
      color: #9ca3af;
      padding: 60px 0 30px 0;
      border-top: 1px solid #1f2937;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 40px;
      margin-bottom: 40px;
    }

    .footer-brand h3 {
      color: #ffffff;
      font-size: 1.3rem;
      margin-bottom: 12px;
    }

    .footer-brand p {
      font-size: 0.9rem;
      line-height: 1.6;
      margin-bottom: 16px;
    }

    .footer-col h4 {
      color: #ffffff;
      font-size: 1rem;
      margin-bottom: 16px;
      font-weight: 600;
    }

    .footer-links li {
      margin-bottom: 10px;
    }

    .footer-links a {
      color: #9ca3af;
      font-size: 0.9rem;
    }

    .footer-links a:hover {
      color: var(--accent);
    }

    .qrcode-box {
      display: flex;
      align-items: center;
      gap: 16px;
      background: #1f2937;
      padding: 16px;
      border-radius: var(--radius-md);
    }

    .qrcode-box img {
      width: 80px;
      height: 80px;
      border-radius: 4px;
      background: #fff;
    }

    .qrcode-text {
      font-size: 0.85rem;
      line-height: 1.4;
      color: #d1d5db;
    }

    .friend-links {
      border-top: 1px solid #1f2937;
      padding-top: 24px;
      margin-top: 24px;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 16px;
      font-size: 0.85rem;
    }

    .friend-links a {
      color: #9ca3af;
    }

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

    .footer-bottom {
      border-top: 1px solid #1f2937;
      padding-top: 24px;
      text-align: center;
      font-size: 0.85rem;
      color: #6b7280;
    }

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

    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #ffffff;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      color: var(--primary);
      transition: all 0.2s ease;
      font-size: 1.2rem;
    }

    .float-btn:hover {
      background: var(--primary);
      color: #ffffff;
    }

    /* Responsive */
    @media (max-width: 992px) {
      .grid-4 { grid-template-columns: repeat(2, 1fr); }
      .grid-3 { grid-template-columns: repeat(2, 1fr); }
      .hero-highlights { grid-template-columns: repeat(2, 1fr); }
      .step-grid { grid-template-columns: repeat(2, 1fr); }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }

    @media (max-width: 768px) {
      .section { padding: 50px 0; }
      .hero-title { font-size: 2rem; }
      .grid-4, .grid-3, .grid-2 { grid-template-columns: 1fr; }
      .hero-highlights { grid-template-columns: 1fr; }
      .step-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr; }
      .menu-toggle { display: block; }
      
      .nav-menu {
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #ffffff;
        flex-direction: column;
        align-items: flex-start;
        padding: 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
        display: none;
      }

      .nav-menu.active {
        display: flex;
      }

      .nav-links {
        flex-direction: column;
        align-items: flex-start;
        width: 100%;
        gap: 0;
      }

      .nav-links li {
        width: 100%;
      }

      .nav-links li a {
        width: 100%;
        padding: 12px 0;
      }

      .nav-btn {
        margin: 12px 0 0 0;
        width: 100%;
      }
    }