:root {
      --primary: #0284c7;
      --primary-hover: #0369a1;
      --primary-light: #e0f2fe;
      --accent: #f97316;
      --accent-light: #fff7ed;
      --text-main: #0f172a;
      --text-muted: #475569;
      --bg-base: #f8fafc;
      --bg-card: #ffffff;
      --border-color: #e2e8f0;
      --radius: 12px;
      --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
      --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
      --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.04);
      --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, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-base);
      color: var(--text-main);
      line-height: 1.6;
    }
    body {
      background-color: var(--bg-base);
      color: var(--text-main);
      overflow-x: hidden;
    }
    a {
      color: inherit;
      text-decoration: none;
      transition: color 0.2s ease;
    }
    .container {
      width: 100%;
      max-width: var(--container-max);
      margin: 0 auto;
      padding-left: 20px;
      padding-right: 20px;
    }
    
    /* 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);
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-wrap {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .brand-wrap .ai-page-logo {
      height: 38px;
      width: auto;
      object-fit: contain;
      display: block;
    }
    .brand-wrap .site-title-badge {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--text-main);
      letter-spacing: -0.5px;
    }
    .nav-menu {
      display: flex;
      align-items: center;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
    }
    .nav-links li a {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-muted);
      padding: 8px 14px;
      border-radius: 6px;
      transition: all 0.2s ease;
    }
    .nav-links li a:hover,
    .nav-links li a.active {
      color: var(--primary);
      background-color: var(--primary-light);
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .mobile-toggle {
      display: none;
      background: none;
      border: 1px solid var(--border-color);
      padding: 8px 12px;
      border-radius: 6px;
      cursor: pointer;
      font-size: 1.1rem;
      color: var(--text-main);
    }

    /* Buttons */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 0.95rem;
      font-weight: 600;
      border-radius: 8px;
      cursor: pointer;
      border: 1px solid transparent;
      transition: all 0.25s ease;
      white-space: nowrap;
    }
    .btn-primary {
      background-color: var(--primary);
      color: #ffffff;
      box-shadow: 0 2px 4px rgba(2, 132, 199, 0.25);
    }
    .btn-primary:hover {
      background-color: var(--primary-hover);
      transform: translateY(-1px);
      box-shadow: 0 4px 10px rgba(2, 132, 199, 0.35);
    }
    .btn-accent {
      background-color: var(--accent);
      color: #ffffff;
    }
    .btn-accent:hover {
      background-color: #ea580c;
      transform: translateY(-1px);
    }
    .btn-outline {
      background: #ffffff;
      border-color: var(--border-color);
      color: var(--text-main);
    }
    .btn-outline:hover {
      background-color: #f1f5f9;
      border-color: #cbd5e1;
    }

    /* Hero Section (No Images Allowed) */
    .hero-section {
      position: relative;
      padding: 80px 0 60px;
      background: linear-gradient(180deg, #e0f2fe 0%, #f0f9ff 40%, var(--bg-base) 100%);
      border-bottom: 1px solid var(--border-color);
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1fr;
      gap: 32px;
      text-align: center;
    }
    .hero-tag {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background-color: #ffffff;
      border: 1px solid #bae6fd;
      color: var(--primary);
      font-size: 0.88rem;
      font-weight: 600;
      padding: 6px 16px;
      border-radius: 50px;
      margin: 0 auto 16px;
      box-shadow: var(--shadow-sm);
    }
    .hero-title {
      font-size: 2.6rem;
      line-height: 1.25;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }
    .hero-title span {
      color: var(--primary);
    }
    .hero-desc {
      font-size: 1.15rem;
      line-height: 1.8;
      color: var(--text-muted);
      max-width: 820px;
      margin: 0 auto 36px;
    }
    .hero-cta {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 16px;
      margin-bottom: 48px;
    }
    .hero-cta .btn-hero-main {
      font-size: 1.1rem;
      padding: 14px 34px;
      border-radius: 10px;
    }
    .hero-metrics {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      max-width: 980px;
      margin: 0 auto;
    }
    .metric-card {
      background: #ffffff;
      padding: 20px 16px;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: transform 0.2s ease, box-shadow 0.2s ease;
    }
    .metric-card:hover {
      transform: translateY(-2px);
      box-shadow: var(--shadow-md);
    }
    .metric-num {
      font-size: 1.8rem;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 4px;
    }
    .metric-label {
      font-size: 0.9rem;
      color: var(--text-muted);
      font-weight: 500;
    }

    /* Section Global */
    section {
      padding: 70px 0;
      border-bottom: 1px solid var(--border-color);
    }
    .section-head {
      text-align: center;
      max-width: 720px;
      margin: 0 auto 48px;
    }
    .section-tag {
      color: var(--primary);
      font-size: 0.88rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1px;
      margin-bottom: 8px;
      display: block;
    }
    .section-title {
      font-size: 2rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 12px;
      line-height: 1.3;
    }
    .section-desc {
      font-size: 1rem;
      color: var(--text-muted);
    }

    /* Model Badges Grid */
    .model-pills {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 24px;
    }
    .model-pill {
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 8px 16px;
      border-radius: 30px;
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--text-main);
      transition: all 0.2s ease;
    }
    .model-pill:hover {
      border-color: var(--primary);
      background-color: var(--primary-light);
      color: var(--primary);
    }

    /* Service Cards (AIGC Services) */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 28px;
    }
    .card {
      background: var(--bg-card);
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      padding: 28px 24px;
      box-shadow: var(--shadow-sm);
      transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
      display: flex;
      flex-direction: column;
    }
    .card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
      border-color: #cbd5e1;
    }
    .card-icon {
      width: 48px;
      height: 48px;
      border-radius: 10px;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      margin-bottom: 18px;
      font-weight: bold;
    }
    .card-title {
      font-size: 1.2rem;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-main);
    }
    .card-desc {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
    }
    .card-tags {
      margin-top: 14px;
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
    }
    .tag-item {
      font-size: 0.75rem;
      background: #f1f5f9;
      color: #334155;
      padding: 3px 8px;
      border-radius: 4px;
    }

    /* About Section */
    .about-box {
      background: #ffffff;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      padding: 36px;
      box-shadow: var(--shadow-sm);
    }
    .about-item {
      display: flex;
      gap: 16px;
      margin-bottom: 24px;
    }
    .about-item:last-child {
      margin-bottom: 0;
    }
    .about-bullet {
      width: 32px;
      height: 32px;
      background: var(--accent-light);
      color: var(--accent);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      flex-shrink: 0;
    }
    .about-content h4 {
      font-size: 1.05rem;
      font-weight: 700;
      margin-bottom: 4px;
    }
    .about-content p {
      font-size: 0.92rem;
      color: var(--text-muted);
    }

    /* Workflow Steps */
    .steps-wrapper {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }
    .step-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      position: relative;
    }
    .step-num {
      width: 36px;
      height: 36px;
      border-radius: 8px;
      background: var(--primary);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      margin-bottom: 16px;
    }

    /* Showcase & Articles with images */
    .media-card {
      background: #ffffff;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
    }
    .media-card-img-wrap {
      width: 100%;
      aspect-ratio: 16 / 9;
      background-color: #f1f5f9;
      overflow: hidden;
    }
    .media-card-img-wrap.square {
      aspect-ratio: 1 / 1;
    }
    .media-card-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
      transition: transform 0.3s ease;
    }
    .media-card:hover .media-card-img-wrap img {
      transform: scale(1.03);
    }
    .media-card-body {
      padding: 20px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .media-card-title {
      font-size: 1.05rem;
      font-weight: 700;
      margin-bottom: 8px;
      color: var(--text-main);
    }
    .media-card-desc {
      font-size: 0.88rem;
      color: var(--text-muted);
      margin-bottom: 14px;
      line-height: 1.5;
    }

    /* Comparison Table (评分 9.9) */
    .compare-header-box {
      background: linear-gradient(135deg, #0284c7 0%, #0369a1 100%);
      color: #ffffff;
      border-radius: var(--radius);
      padding: 30px;
      text-align: center;
      margin-bottom: 30px;
      box-shadow: var(--shadow-md);
    }
    .compare-score {
      font-size: 3rem;
      font-weight: 900;
      line-height: 1;
      margin: 10px 0;
      color: #fef08a;
    }
    .stars {
      color: #facc15;
      font-size: 1.4rem;
      letter-spacing: 4px;
    }
    .table-responsive {
      width: 100%;
      overflow-x: auto;
      background: #ffffff;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 650px;
    }
    .compare-table th, 
    .compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
      font-size: 0.95rem;
    }
    .compare-table th {
      background: #f8fafc;
      font-weight: 700;
      color: var(--text-main);
    }
    .compare-table td.highlight {
      background: #f0f9ff;
      color: var(--primary);
      font-weight: 700;
    }

    /* FAQ Accordion */
    .faq-list {
      max-width: 880px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 10px;
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .faq-question {
      width: 100%;
      padding: 18px 22px;
      background: none;
      border: none;
      text-align: left;
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      transition: background 0.2s ease;
    }
    .faq-question:hover {
      background: #f8fafc;
    }
    .faq-question::after {
      content: "+";
      font-size: 1.3rem;
      color: var(--primary);
      font-weight: 400;
      margin-left: 12px;
    }
    .faq-item.active .faq-question::after {
      content: "-";
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      background: #fafafa;
      color: var(--text-muted);
      font-size: 0.92rem;
      line-height: 1.7;
      padding: 0 22px;
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
      padding: 16px 22px 20px;
      border-top: 1px solid var(--border-color);
    }

    /* Testimonials (6 reviews) */
    .testimonial-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      box-shadow: var(--shadow-sm);
    }
    .testimonial-content {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 20px;
      font-style: italic;
    }
    .testimonial-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #f1f5f9;
      padding-top: 14px;
    }
    .author-avatar {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1rem;
    }
    .author-info h5 {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--text-main);
    }
    .author-info p {
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    /* Articles Section */
    .article-links-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
    }
    .article-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }
    .article-item a {
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--text-main);
      padding: 10px 14px;
      border-radius: 8px;
      background: #f8fafc;
      border: 1px solid var(--border-color);
    }
    .article-item a:hover {
      color: var(--primary);
      border-color: var(--primary);
      background: var(--primary-light);
    }

    /* Form & Contact */
    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
    }
    .form-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 32px;
      box-shadow: var(--shadow-sm);
    }
    .form-group {
      margin-bottom: 18px;
    }
    .form-group label {
      display: block;
      font-size: 0.9rem;
      font-weight: 600;
      margin-bottom: 6px;
      color: var(--text-main);
    }
    .form-control {
      width: 100%;
      padding: 10px 14px;
      border-radius: 8px;
      border: 1px solid var(--border-color);
      font-size: 0.95rem;
      outline: none;
      background: #ffffff;
      transition: border-color 0.2s ease;
    }
    .form-control:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.15);
    }
    textarea.form-control {
      resize: vertical;
      min-height: 100px;
    }
    .contact-info-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 32px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .qr-container {
      display: flex;
      align-items: center;
      gap: 20px;
      background: #f8fafc;
      padding: 18px;
      border-radius: 10px;
      margin-top: 20px;
      border: 1px solid var(--border-color);
    }
    .qr-container img {
      width: 100px;
      height: 100px;
      border-radius: 8px;
      border: 1px solid var(--border-color);
      background: #fff;
    }
    .qr-desc h5 {
      font-size: 1rem;
      font-weight: 700;
      margin-bottom: 4px;
    }
    .qr-desc p {
      font-size: 0.85rem;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* Agency Section */
    .agency-banner {
      background: linear-gradient(135deg, #fff7ed 0%, #ffedd5 100%);
      border: 1px solid #fed7aa;
      border-radius: var(--radius);
      padding: 36px;
      text-align: center;
    }
    .agency-banner h3 {
      font-size: 1.8rem;
      color: #9a3412;
      font-weight: 800;
      margin-bottom: 12px;
    }
    .agency-banner p {
      font-size: 1rem;
      color: #c2410c;
      max-width: 700px;
      margin: 0 auto 24px;
    }

    /* Footer */
    .site-footer {
      background-color: #0f172a;
      color: #94a3b8;
      padding: 50px 0 24px;
      border-top: 1px solid #1e293b;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 36px;
      margin-bottom: 40px;
    }
    .footer-brand h4 {
      color: #ffffff;
      font-size: 1.25rem;
      font-weight: 700;
      margin-bottom: 14px;
    }
    .footer-brand p {
      font-size: 0.9rem;
      line-height: 1.6;
      max-width: 320px;
    }
    .footer-col h5 {
      color: #f8fafc;
      font-size: 0.95rem;
      font-weight: 700;
      margin-bottom: 16px;
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-links a {
      color: #94a3b8;
      font-size: 0.88rem;
    }
    .footer-links a:hover {
      color: #38bdf8;
    }
    .friendly-links {
      border-top: 1px solid #1e293b;
      padding-top: 24px;
      margin-top: 24px;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 16px;
      font-size: 0.85rem;
    }
    .friendly-links span {
      color: #f8fafc;
      font-weight: 600;
    }
    .friendly-links a {
      color: #94a3b8;
    }
    .friendly-links a:hover {
      color: #38bdf8;
    }
    .footer-bottom {
      border-top: 1px solid #1e293b;
      padding-top: 20px;
      margin-top: 24px;
      text-align: center;
      font-size: 0.85rem;
      color: #64748b;
    }

    /* Floating Widget */
    .float-dock {
      position: fixed;
      right: 20px;
      bottom: 30px;
      display: flex;
      flex-direction: column;
      gap: 10px;
      z-index: 999;
    }
    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: var(--primary);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 12px rgba(0,0,0,0.15);
      border: none;
      cursor: pointer;
      font-size: 1.2rem;
      text-decoration: none;
      transition: transform 0.2s ease, background 0.2s ease;
    }
    .float-btn:hover {
      transform: scale(1.08);
      background: var(--primary-hover);
    }
    .float-qr-panel {
      display: none;
      position: absolute;
      right: 60px;
      bottom: 0;
      background: #ffffff;
      padding: 14px;
      border-radius: 10px;
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--border-color);
      width: 160px;
      text-align: center;
    }
    .float-qr-panel img {
      width: 100%;
      height: auto;
      display: block;
      border-radius: 4px;
    }
    .float-qr-panel p {
      font-size: 0.78rem;
      color: var(--text-muted);
      margin-top: 6px;
    }
    .float-kefu-wrap:hover .float-qr-panel {
      display: block;
    }

    /* Responsive */
    @media (max-width: 1024px) {
      .grid-4, .steps-wrapper {
        grid-template-columns: repeat(2, 1fr);
      }
      .hero-metrics {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }
    @media (max-width: 768px) {
      .grid-3, .grid-2, .contact-grid {
        grid-template-columns: 1fr;
      }
      .hero-title {
        font-size: 1.9rem;
      }
      .hero-desc {
        font-size: 1rem;
      }
      .mobile-toggle {
        display: block;
      }
      .nav-menu {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #ffffff;
        border-bottom: 1px solid var(--border-color);
        padding: 16px 20px;
        box-shadow: var(--shadow-md);
      }
      .nav-menu.active {
        display: block;
      }
      .nav-links {
        flex-direction: column;
        align-items: flex-start;
      }
      .nav-links li {
        width: 100%;
      }
      .nav-links li a {
        display: block;
        padding: 10px 0;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }