/* Global Reset & Base Styles - Vibrant Fashion Trend (艳色潮流风) */
    :root {
      --primary-color: #6366f1;
      --primary-gradient: linear-gradient(135deg, #6366f1 0%, #a855f7 50%, #ec4899 100%);
      --accent-color: #ec4899;
      --cyan-accent: #06b6d4;
      --bg-main: #f8fafc;
      --bg-card: #ffffff;
      --text-dark: #0f172a;
      --text-muted: #475569;
      --border-light: #e2e8f0;
      --shadow-sm: 0 4px 12px rgba(99, 102, 241, 0.06);
      --shadow-lg: 0 20px 40px -15px rgba(99, 102, 241, 0.15);
      --radius-lg: 18px;
      --radius-md: 12px;
      --radius-sm: 8px;
    }

    * {
      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-dark);
      line-height: 1.6;
    }

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

    a {
      color: var(--primary-color);
      text-decoration: none;
      transition: all 0.25s ease;
    }

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

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

    /* Section Utilities */
    .section-padding {
      padding: 80px 0;
    }

    .section-title-wrap {
      text-align: center;
      margin-bottom: 50px;
    }

    .section-tag {
      display: inline-block;
      padding: 6px 16px;
      background: rgba(99, 102, 241, 0.1);
      color: var(--primary-color);
      border-radius: 20px;
      font-size: 14px;
      font-weight: 700;
      letter-spacing: 1px;
      margin-bottom: 12px;
      text-transform: uppercase;
    }

    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: var(--text-dark);
      letter-spacing: -0.5px;
    }

    .section-subtitle {
      font-size: 16px;
      color: var(--text-muted);
      margin-top: 10px;
      max-width: 680px;
      margin-left: auto;
      margin-right: auto;
    }

    /* Buttons */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 14px 32px;
      border-radius: 30px;
      font-weight: 700;
      font-size: 16px;
      cursor: pointer;
      border: none;
      transition: all 0.3s ease;
      text-decoration: none;
      box-shadow: 0 8px 20px rgba(99, 102, 241, 0.25);
    }

    .btn-primary {
      background: var(--primary-gradient);
      color: #ffffff !important;
    }

    .btn-primary:hover {
      transform: translateY(-3px);
      box-shadow: 0 12px 28px rgba(236, 72, 153, 0.35);
    }

    .btn-outline {
      background: #ffffff;
      color: var(--text-dark);
      border: 2px solid var(--border-light);
      box-shadow: none;
    }

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

    /* Header & Navigation */
    .header-nav {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(226, 232, 240, 0.8);
      box-shadow: 0 4px 20px rgba(0,0,0,0.03);
    }

    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 76px;
    }

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

    .ai-page-logo {
      height: 42px;
      width: auto;
      object-fit: contain;
    }

    /* Explicit requirement: CSS .nav-links gap property set to 0 */
    .nav-links {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 0;
    }

    .nav-links li a {
      padding: 10px 16px;
      font-size: 15px;
      font-weight: 600;
      color: var(--text-dark);
      border-radius: 8px;
    }

    .nav-links li a:hover {
      color: var(--primary-color);
      background: rgba(99, 102, 241, 0.05);
    }

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

    /* Hero Section (No Images Allowed) */
    .hero-section {
      padding: 100px 0 80px;
      background: radial-gradient(circle at 50% 20%, rgba(99, 102, 241, 0.12) 0%, rgba(236, 72, 153, 0.05) 50%, rgba(248, 250, 252, 0) 100%);
      text-align: center;
      position: relative;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 8px 20px;
      background: #ffffff;
      border: 1px solid rgba(99, 102, 241, 0.2);
      border-radius: 30px;
      font-size: 14px;
      font-weight: 700;
      color: var(--primary-color);
      margin-bottom: 24px;
      box-shadow: var(--shadow-sm);
    }

    .hero-badge span {
      background: var(--primary-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-h1 {
      font-size: 42px;
      font-weight: 900;
      line-height: 1.25;
      letter-spacing: -1px;
      color: var(--text-dark);
      margin-bottom: 20px;
    }

    .hero-desc {
      font-size: 18px;
      color: var(--text-muted);
      max-width: 800px;
      margin: 0 auto 36px;
      line-height: 1.7;
    }

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

    /* Feature Grid / Cards */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

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

    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 32px;
    }

    .card-style {
      background: var(--bg-card);
      border-radius: var(--radius-lg);
      padding: 30px;
      border: 1px solid var(--border-light);
      box-shadow: var(--shadow-sm);
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

    .card-style:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-lg);
      border-color: rgba(99, 102, 241, 0.3);
    }

    .card-icon {
      width: 54px;
      height: 54px;
      border-radius: 14px;
      background: var(--primary-gradient);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-size: 24px;
      font-weight: bold;
      margin-bottom: 20px;
    }

    .card-title {
      font-size: 20px;
      font-weight: 700;
      color: var(--text-dark);
      margin-bottom: 12px;
    }

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

    /* Data Metric Cards */
    .metric-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 40px;
    }

    .metric-card {
      background: #ffffff;
      padding: 24px;
      border-radius: var(--radius-md);
      text-align: center;
      border: 1px solid var(--border-light);
      box-shadow: var(--shadow-sm);
    }

    .metric-num {
      font-size: 36px;
      font-weight: 900;
      background: var(--primary-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .metric-label {
      font-size: 14px;
      color: var(--text-muted);
      margin-top: 6px;
      font-weight: 600;
    }

    /* Comparison Table Requirements */
    .table-wrapper {
      overflow-x: auto;
      background: #ffffff;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-light);
      box-shadow: var(--shadow-sm);
    }

    .custom-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 700px;
    }

    .custom-table th, .custom-table td {
      padding: 18px 24px;
      border-bottom: 1px solid var(--border-light);
    }

    .custom-table th {
      background: #f8fafc;
      font-weight: 700;
      color: var(--text-dark);
      font-size: 15px;
    }

    .custom-table tr:hover {
      background: rgba(99, 102, 241, 0.02);
    }

    .badge-highlight {
      display: inline-block;
      padding: 4px 12px;
      background: rgba(236, 72, 153, 0.1);
      color: var(--accent-color);
      border-radius: 12px;
      font-weight: 700;
      font-size: 13px;
    }

    /* Score Box */
    .rating-box {
      background: linear-gradient(135deg, #6366f1 0%, #ec4899 100%);
      color: #ffffff;
      padding: 32px;
      border-radius: var(--radius-lg);
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 30px;
    }

    .rating-score {
      font-size: 48px;
      font-weight: 900;
      line-height: 1;
    }

    .rating-stars {
      font-size: 24px;
      color: #fbbf24;
      margin-top: 8px;
    }

    /* Models Cloud / Badges */
    .tag-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 20px;
    }

    .tag-item {
      padding: 8px 16px;
      background: #ffffff;
      border: 1px solid var(--border-light);
      border-radius: 20px;
      font-size: 13px;
      font-weight: 600;
      color: var(--text-muted);
      transition: all 0.2s;
    }

    .tag-item:hover {
      border-color: var(--primary-color);
      color: var(--primary-color);
      transform: scale(1.05);
    }

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

    .step-card {
      background: #ffffff;
      padding: 28px 20px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-light);
      text-align: center;
      position: relative;
    }

    .step-number {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: var(--primary-gradient);
      color: #ffffff;
      font-weight: 800;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 16px;
    }

    /* FAQ Section */
    .faq-list {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: all 0.3s;
    }

    .faq-title {
      padding: 20px 24px;
      font-weight: 700;
      font-size: 17px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }

    .faq-content {
      padding: 0 24px 20px;
      font-size: 15px;
      color: var(--text-muted);
      display: none;
      border-top: 1px dashed var(--border-light);
      margin-top: 8px;
      padding-top: 16px;
    }

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

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

    /* Reviews Section */
    .review-card {
      background: #ffffff;
      padding: 28px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-light);
      box-shadow: var(--shadow-sm);
    }

    .review-user {
      display: flex;
      align-items: center;
      gap: 14px;
      margin-top: 20px;
    }

    .review-avatar {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: var(--primary-gradient);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
      font-size: 18px;
    }

    /* Form Section */
    .form-wrapper {
      background: #ffffff;
      padding: 40px;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-light);
      box-shadow: var(--shadow-lg);
      max-width: 760px;
      margin: 0 auto;
    }

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

    .form-label {
      display: block;
      margin-bottom: 8px;
      font-weight: 700;
      font-size: 14px;
      color: var(--text-dark);
    }

    .form-control {
      width: 100%;
      padding: 14px 18px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-light);
      font-size: 15px;
      outline: none;
      transition: border 0.2s;
    }

    .form-control:focus {
      border-color: var(--primary-color);
      box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
    }

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

    /* Contact Details & QR Code */
    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }

    .qr-box {
      text-align: center;
      background: #ffffff;
      padding: 24px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-light);
    }

    .qr-box img {
      max-width: 180px;
      height: auto;
      border-radius: 12px;
      margin-bottom: 12px;
    }

    /* Media Assets Section */
    .media-showcase {
      display: grid;
      grid-template-columns: 2fr 1fr;
      gap: 24px;
      margin-top: 30px;
    }

    .media-showcase img {
      width: 100%;
      height: auto;
      border-radius: var(--radius-md);
      object-fit: cover;
    }

    /* Links & Footer */
    .footer {
      background: #0f172a;
      color: #94a3b8;
      padding: 70px 0 30px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 40px;
      margin-bottom: 50px;
    }

    .footer-title {
      color: #ffffff;
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 20px;
    }

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

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

    .footer-links a {
      color: #94a3b8;
      font-size: 14px;
    }

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

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

    .friendship-links a {
      background: rgba(255,255,255,0.05);
      padding: 6px 14px;
      border-radius: 6px;
      font-size: 13px;
      color: #cbd5e1;
    }

    .friendship-links a:hover {
      background: rgba(99, 102, 241, 0.3);
      color: #ffffff;
    }

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      padding-top: 30px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-size: 14px;
    }

    /* Float Widget */
    .float-service {
      position: fixed;
      right: 24px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .float-btn {
      width: 52px;
      height: 52px;
      border-radius: 50%;
      background: var(--primary-gradient);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 8px 24px rgba(0,0,0,0.2);
      cursor: pointer;
      transition: transform 0.3s;
      text-decoration: none;
      font-size: 20px;
    }

    .float-btn:hover {
      transform: scale(1.1);
    }

    /* Articles Box */
    .article-card {
      background: #ffffff;
      padding: 20px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-light);
      margin-bottom: 12px;
      transition: all 0.2s;
    }

    .article-card:hover {
      border-color: var(--primary-color);
      transform: translateX(4px);
    }

    /* Responsive Breakdown */
    @media (max-width: 992px) {
      .grid-4, .process-grid, .metric-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-3 {
        grid-template-columns: 1fr;
      }
      .contact-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .media-showcase {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 76px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        padding: 20px;
        border-bottom: 1px solid var(--border-light);
        box-shadow: var(--shadow-lg);
      }

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

      .mobile-menu-btn {
        display: block;
      }

      .hero-h1 {
        font-size: 28px;
      }

      .grid-2, .grid-4, .metric-grid, .process-grid {
        grid-template-columns: 1fr;
      }

      .footer-grid {
        grid-template-columns: 1fr;
      }

      .rating-box {
        flex-direction: column;
        text-align: center;
        gap: 16px;
      }
    }