/* CSS RESET & STYLES - Vibrant Candy Light Theme (缤纷糖果亮色风) */
    *, *::before, *::after {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    html {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.6;
      color: #0f172a;
      background-color: #f8fafc;
      scroll-behavior: smooth;
    }

    body {
      overflow-x: hidden;
    }

    /* Color Palette Variables */
    :root {
      --primary: #6366f1;
      --primary-gradient: linear-gradient(135deg, #6366f1, #8b5cf6);
      --candy-pink: linear-gradient(135deg, #ff416c, #ff4b2b);
      --candy-purple: linear-gradient(135deg, #a855f7, #ec4899);
      --candy-blue: linear-gradient(135deg, #00c6ff, #0072ff);
      --candy-teal: linear-gradient(135deg, #14b8a6, #06b6d4);
      --candy-amber: linear-gradient(135deg, #f59e0b, #fbbf24);
      --bg-light: #f8fafc;
      --card-bg: #ffffff;
      --text-dark: #0f172a;
      --text-muted: #475569;
      --border-color: #e2e8f0;
      --shadow-soft: 0 10px 30px -5px rgba(99, 102, 241, 0.08);
      --shadow-hover: 0 20px 35px -5px rgba(99, 102, 241, 0.15);
    }

    /* Universal Container */
    .container {
      width: 100%;
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 20px;
    }

    a {
      color: #4f46e5;
      text-decoration: none;
      transition: all 0.2s ease;
    }
    a:hover {
      color: #4338ca;
    }

    ul {
      list-style: none;
    }

    /* Buttons */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 12px 28px;
      font-size: 1rem;
      font-weight: 600;
      border-radius: 9999px;
      cursor: pointer;
      transition: transform 0.2s ease, box-shadow 0.2s ease;
      border: none;
      outline: none;
      white-space: nowrap;
    }

    .btn-primary {
      background: var(--candy-pink);
      color: #ffffff !important;
      box-shadow: 0 8px 20px rgba(255, 65, 108, 0.3);
    }
    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 12px 25px rgba(255, 65, 108, 0.4);
    }

    .btn-gradient {
      background: var(--candy-purple);
      color: #ffffff !important;
      box-shadow: 0 8px 20px rgba(168, 85, 247, 0.3);
    }
    .btn-gradient:hover {
      transform: translateY(-2px);
      box-shadow: 0 12px 25px rgba(168, 85, 247, 0.4);
    }

    .btn-outline {
      background: #ffffff;
      color: #0f172a !important;
      border: 2px solid #e2e8f0;
      box-shadow: 0 4px 12px rgba(0,0,0,0.03);
    }
    .btn-outline:hover {
      border-color: #6366f1;
      color: #6366f1 !important;
      transform: translateY(-2px);
    }

    /* Section Styling */
    .section-padding {
      padding: 80px 0;
    }
    .section-title-wrap {
      text-align: center;
      margin-bottom: 50px;
    }
    .section-subtitle {
      display: inline-block;
      padding: 6px 16px;
      border-radius: 50px;
      background: rgba(99, 102, 241, 0.1);
      color: #4f46e5;
      font-size: 0.875rem;
      font-weight: 700;
      margin-bottom: 12px;
      letter-spacing: 0.5px;
    }
    .section-title {
      font-size: 2.25rem;
      font-weight: 800;
      color: #0f172a;
      line-height: 1.3;
    }
    .section-desc {
      font-size: 1.05rem;
      color: #475569;
      max-width: 720px;
      margin: 12px auto 0;
    }

    /* Navigation */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid #e2e8f0;
    }
    .header-nav {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-area {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .brand-area .ai-page-logo {
      height: 40px;
      width: auto;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 24px;
    }
    .nav-links a {
      color: #334155;
      font-weight: 600;
      font-size: 0.95rem;
    }
    .nav-links a:hover {
      color: #6366f1;
    }
    .header-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      color: #0f172a;
      cursor: pointer;
    }

    /* Hero Section (No images strictly enforced) */
    .hero-section {
      padding: 90px 0 80px;
      background: radial-gradient(circle at 10% 20%, rgba(255, 65, 108, 0.08) 0%, rgba(0, 198, 255, 0.05) 90%), #ffffff;
      border-bottom: 1px solid #f1f5f9;
      text-align: center;
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 8px 20px;
      border-radius: 50px;
      background: linear-gradient(90deg, rgba(99, 102, 241, 0.1), rgba(236, 72, 153, 0.1));
      border: 1px solid rgba(99, 102, 241, 0.2);
      color: #4f46e5;
      font-weight: 700;
      font-size: 0.9rem;
      margin-bottom: 24px;
    }
    .hero-title {
      font-size: 2.8rem;
      font-weight: 900;
      color: #0f172a;
      letter-spacing: -0.5px;
      line-height: 1.25;
      max-width: 900px;
      margin: 0 auto 20px;
    }
    .hero-title span {
      background: linear-gradient(135deg, #6366f1, #ec4899);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-subtitle {
      font-size: 1.2rem;
      color: #475569;
      max-width: 780px;
      margin: 0 auto 36px;
      line-height: 1.7;
    }
    .hero-cta-group {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 50px;
    }
    .hero-stats {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      gap: 20px;
      margin-top: 40px;
    }
    .stat-card {
      background: #ffffff;
      padding: 24px 20px;
      border-radius: 20px;
      border: 1px solid #e2e8f0;
      box-shadow: var(--shadow-soft);
      text-align: center;
      transition: transform 0.3s ease;
    }
    .stat-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-hover);
    }
    .stat-number {
      font-size: 2.2rem;
      font-weight: 800;
      background: var(--candy-blue);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      margin-bottom: 4px;
    }
    .stat-label {
      color: #475569;
      font-weight: 600;
      font-size: 0.95rem;
    }

    /* Cards Layout Base */
    .card-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 24px;
    }
    .candy-card {
      background: #ffffff;
      border-radius: 20px;
      padding: 30px;
      border: 1px solid #e2e8f0;
      box-shadow: var(--shadow-soft);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      display: flex;
      flex-direction: column;
    }
    .candy-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
    }
    .card-icon-box {
      width: 56px;
      height: 56px;
      border-radius: 16px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.5rem;
      color: #fff;
      margin-bottom: 20px;
    }

    /* Model Grid Pills */
    .model-tag-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      justify-content: center;
    }
    .model-tag {
      padding: 10px 20px;
      border-radius: 50px;
      background: #ffffff;
      border: 1px solid #e2e8f0;
      color: #0f172a;
      font-weight: 700;
      font-size: 0.95rem;
      box-shadow: 0 4px 10px rgba(0,0,0,0.02);
      transition: all 0.2s ease;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .model-tag:hover {
      background: var(--primary-gradient);
      color: #ffffff;
      border-color: transparent;
      transform: scale(1.05);
    }
    .model-tag .badge-hot {
      background: var(--candy-pink);
      color: #fff;
      font-size: 0.7rem;
      padding: 2px 6px;
      border-radius: 10px;
    }

    /* Comparison Section */
    .rating-header-card {
      background: linear-gradient(135deg, #4f46e5, #7c3aed);
      color: #ffffff;
      border-radius: 24px;
      padding: 36px;
      text-align: center;
      margin-bottom: 40px;
      box-shadow: 0 15px 35px rgba(79, 70, 229, 0.25);
    }
    .rating-stars {
      color: #f59e0b;
      font-size: 2rem;
      margin-bottom: 8px;
    }
    .rating-score {
      font-size: 3.5rem;
      font-weight: 900;
      line-height: 1;
    }
    .rating-score-sub {
      font-size: 1.2rem;
      opacity: 0.9;
    }
    .table-responsive {
      width: 100%;
      overflow-x: auto;
      background: #ffffff;
      border-radius: 20px;
      border: 1px solid #e2e8f0;
      box-shadow: var(--shadow-soft);
    }
    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 700px;
    }
    .compare-table th, .compare-table td {
      padding: 18px 24px;
      border-bottom: 1px solid #e2e8f0;
    }
    .compare-table th {
      background: #f8fafc;
      color: #0f172a;
      font-weight: 700;
      font-size: 1rem;
    }
    .compare-table tr:hover {
      background: #f1f5f9;
    }
    .highlight-cell {
      background: rgba(99, 102, 241, 0.05);
      color: #4f46e5;
      font-weight: 700;
    }

    /* Image Gallery & Banner Area */
    .image-gallery-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
      gap: 20px;
      margin-top: 30px;
    }
    .gallery-item {
      border-radius: 16px;
      overflow: hidden;
      box-shadow: var(--shadow-soft);
      border: 1px solid #e2e8f0;
      background: #ffffff;
    }
    .gallery-item img {
      width: 100%;
      height: 200px;
      object-fit: cover;
      display: block;
      transition: transform 0.3s ease;
    }
    .gallery-item:hover img {
      transform: scale(1.04);
    }
    .gallery-caption {
      padding: 14px 18px;
      font-weight: 700;
      color: #0f172a;
      font-size: 0.95rem;
    }

    /* Workflow Steps */
    .step-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 20px;
      position: relative;
    }
    .step-card {
      background: #ffffff;
      padding: 28px 24px;
      border-radius: 20px;
      border: 1px solid #e2e8f0;
      box-shadow: var(--shadow-soft);
      position: relative;
    }
    .step-num {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: var(--candy-pink);
      color: #fff;
      font-weight: 800;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 16px;
      font-size: 1.1rem;
    }

    /* Testimonials Grid */
    .testimonial-card {
      background: #ffffff;
      border-radius: 20px;
      padding: 28px;
      border: 1px solid #e2e8f0;
      box-shadow: var(--shadow-soft);
    }
    .user-profile {
      display: flex;
      align-items: center;
      gap: 14px;
      margin-bottom: 16px;
    }
    .avatar-placeholder {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: var(--candy-purple);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1.1rem;
    }
    .user-info h4 {
      font-size: 1rem;
      color: #0f172a;
    }
    .user-info p {
      font-size: 0.85rem;
      color: #475569;
    }
    .quote-text {
      color: #334155;
      font-size: 0.95rem;
      line-height: 1.6;
    }

    /* Accordion FAQ */
    .faq-list {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .faq-item {
      background: #ffffff;
      border: 1px solid #e2e8f0;
      border-radius: 16px;
      overflow: hidden;
      box-shadow: 0 2px 8px rgba(0,0,0,0.02);
    }
    .faq-button {
      width: 100%;
      padding: 20px 24px;
      background: none;
      border: none;
      text-align: left;
      font-size: 1.05rem;
      font-weight: 700;
      color: #0f172a;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
    }
    .faq-button::after {
      content: '+';
      font-size: 1.5rem;
      color: #6366f1;
      transition: transform 0.2s;
    }
    .faq-item.active .faq-button::after {
      content: '-';
    }
    .faq-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      padding: 0 24px;
      color: #475569;
      font-size: 0.95rem;
    }
    .faq-item.active .faq-content {
      padding: 0 24px 20px;
      max-height: 300px;
    }

    /* Form Styles */
    .form-wrap {
      background: #ffffff;
      border-radius: 24px;
      padding: 40px;
      border: 1px solid #e2e8f0;
      box-shadow: var(--shadow-soft);
      max-width: 800px;
      margin: 0 auto;
    }
    .form-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
    }
    .form-group-full {
      grid-column: span 2;
    }
    .form-control {
      width: 100%;
      padding: 14px 18px;
      border-radius: 12px;
      border: 1px solid #cbd5e1;
      font-size: 0.95rem;
      color: #0f172a;
      outline: none;
      transition: border-color 0.2s;
    }
    .form-control:focus {
      border-color: #6366f1;
      box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
    }
    label {
      display: block;
      font-weight: 600;
      margin-bottom: 8px;
      color: #0f172a;
      font-size: 0.9rem;
    }

    /* Footer & Side Controls */
    .site-footer {
      background: #0f172a;
      color: #94a3b8;
      padding: 70px 0 30px;
      border-top: 1px solid #1e293b;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 40px;
      margin-bottom: 50px;
    }
    .footer-col h4 {
      color: #ffffff;
      font-size: 1.1rem;
      margin-bottom: 20px;
    }
    .footer-links a {
      color: #94a3b8;
      display: block;
      margin-bottom: 10px;
      font-size: 0.9rem;
    }
    .footer-links a:hover {
      color: #ffffff;
    }
    .friend-links {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 10px;
    }
    .friend-links a {
      color: #cbd5e1;
      background: #1e293b;
      padding: 6px 14px;
      border-radius: 6px;
      font-size: 0.85rem;
    }
    .friend-links a:hover {
      background: #334155;
      color: #fff;
    }
    .footer-bottom {
      text-align: center;
      padding-top: 30px;
      border-top: 1px solid #1e293b;
      font-size: 0.85rem;
    }

    /* Floating Customer Service */
    .floating-kefu {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      background: #ffffff;
      border-radius: 16px;
      box-shadow: 0 10px 30px rgba(0,0,0,0.15);
      border: 1px solid #e2e8f0;
      padding: 12px;
      text-align: center;
      width: 130px;
    }
    .floating-kefu img {
      width: 100%;
      height: auto;
      border-radius: 8px;
    }
    .floating-kefu p {
      font-size: 0.75rem;
      font-weight: 700;
      color: #0f172a;
      margin-top: 6px;
    }

    /* Article List Box */
    .article-box {
      background: #ffffff;
      border-radius: 20px;
      padding: 30px;
      border: 1px solid #e2e8f0;
      box-shadow: var(--shadow-soft);
    }
    .article-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .article-item {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 12px 0;
      border-bottom: 1px dashed #e2e8f0;
    }
    .article-item:last-child {
      border-bottom: none;
    }

    /* Responsive Design */
    @media (max-width: 992px) {
      .hero-title { font-size: 2.2rem; }
      .nav-links { display: none; }
      .menu-toggle { display: block; }
      .form-grid { grid-template-columns: 1fr; }
      .form-group-full { grid-column: span 1; }
    }
    @media (max-width: 640px) {
      .hero-title { font-size: 1.75rem; }
      .hero-subtitle { font-size: 1rem; }
      .section-title { font-size: 1.6rem; }
      .floating-kefu { display: none; }
    }