:root {
      --primary: #FFB800;
      --primary-hover: #E5A500;
      --primary-light: #FFF9E6;
      --primary-border: #FFE58F;
      --accent: #FF7A00;
      --dark: #1F2329;
      --text-main: #2A2E35;
      --text-muted: #5E6573;
      --bg-page: #FBFBFC;
      --bg-card: #FFFFFF;
      --border-color: #ECEEF2;
      --radius: 12px;
      --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
      --shadow-md: 0 8px 24px rgba(255, 184, 0, 0.12);
      --shadow-hover: 0 12px 32px rgba(31, 35, 41, 0.08);
      --transition: all 0.25s ease-in-out;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-page);
      color: var(--text-main);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }
    a {
      color: inherit;
      text-decoration: none;
      transition: var(--transition);
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    .container {
      width: 100%;
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }
    /* Header */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-color);
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .brand-logo-wrap {
      max-width: 140px;
      display: flex;
      align-items: center;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
    }
    .nav-links a {
      padding: 8px 14px;
      font-size: 15px;
      font-weight: 500;
      color: var(--text-main);
      border-radius: 6px;
    }
    .nav-links a:hover {
      color: var(--dark);
      background: var(--primary-light);
    }
    .header-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 15px;
      font-weight: 600;
      border-radius: 8px;
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition);
      text-align: center;
    }
    .btn-primary {
      background-color: var(--primary);
      color: #111;
      box-shadow: 0 4px 12px rgba(255, 184, 0, 0.35);
    }
    .btn-primary:hover {
      background-color: var(--primary-hover);
      transform: translateY(-2px);
      box-shadow: 0 6px 16px rgba(255, 184, 0, 0.45);
    }
    .btn-secondary {
      background: #FFFFFF;
      border-color: var(--border-color);
      color: var(--text-main);
    }
    .btn-secondary:hover {
      border-color: var(--primary);
      color: var(--dark);
      background: var(--primary-light);
    }
    .btn-sm {
      padding: 6px 14px;
      font-size: 13px;
    }
    .menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      cursor: pointer;
      color: var(--dark);
    }

    /* Hero Section (No Images Allowed) */
    .hero-section {
      background: radial-gradient(100% 100% at 50% 0%, #FFFDF0 0%, #FFF8D6 45%, #FBFBFC 100%);
      padding: 80px 0 60px;
      border-bottom: 1px solid var(--border-color);
      text-align: center;
      position: relative;
      overflow: hidden;
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      background: #FFFFFF;
      border: 1px solid var(--primary-border);
      border-radius: 30px;
      font-size: 13px;
      font-weight: 600;
      color: var(--accent);
      margin-bottom: 24px;
      box-shadow: var(--shadow-sm);
    }
    .hero-badge span {
      display: inline-block;
      width: 8px;
      height: 8px;
      background: var(--accent);
      border-radius: 50%;
    }
    .hero-title {
      font-size: 42px;
      line-height: 1.25;
      font-weight: 800;
      color: var(--dark);
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }
    .hero-title span {
      background: linear-gradient(135deg, #E69500 0%, #D45B00 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-desc {
      max-width: 840px;
      margin: 0 auto 36px;
      font-size: 17px;
      color: var(--text-muted);
      line-height: 1.7;
    }
    .hero-ctas {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 48px;
    }
    .hero-ctas .btn-primary {
      font-size: 17px;
      padding: 14px 34px;
    }
    .hero-metrics {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      max-width: 1040px;
      margin: 0 auto;
    }
    .metric-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 20px 16px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      text-align: center;
    }
    .metric-card:hover {
      border-color: var(--primary);
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .metric-val {
      font-size: 28px;
      font-weight: 800;
      color: var(--dark);
      margin-bottom: 4px;
    }
    .metric-val em {
      font-style: normal;
      font-size: 16px;
      color: var(--accent);
      margin-left: 2px;
    }
    .metric-label {
      font-size: 13px;
      color: var(--text-muted);
    }

    /* Section Global */
    section {
      padding: 70px 0;
    }
    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 48px;
    }
    .section-tag {
      display: inline-block;
      font-size: 13px;
      font-weight: 700;
      color: var(--accent);
      text-transform: uppercase;
      letter-spacing: 1px;
      margin-bottom: 10px;
      background: var(--primary-light);
      padding: 4px 12px;
      border-radius: 4px;
    }
    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: var(--dark);
      margin-bottom: 14px;
    }
    .section-subtitle {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* Models Cloud Tag */
    .models-bar {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      margin-top: 40px;
    }
    .models-bar-title {
      font-size: 14px;
      font-weight: 700;
      color: var(--text-muted);
      text-align: center;
      margin-bottom: 16px;
    }
    .model-tags {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
    }
    .model-tag {
      background: var(--bg-page);
      border: 1px solid var(--border-color);
      padding: 6px 14px;
      border-radius: 20px;
      font-size: 13px;
      font-weight: 600;
      color: var(--text-main);
      transition: var(--transition);
    }
    .model-tag:hover {
      background: var(--primary);
      border-color: var(--primary);
      color: #111;
      transform: scale(1.05);
    }

    /* Services Grid */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .service-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .service-card:hover {
      border-color: var(--primary-border);
      box-shadow: var(--shadow-md);
      transform: translateY(-4px);
    }
    .service-icon {
      width: 48px;
      height: 48px;
      border-radius: 10px;
      background: var(--primary-light);
      border: 1px solid var(--primary-border);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 22px;
      margin-bottom: 18px;
      color: var(--dark);
    }
    .service-card h3 {
      font-size: 19px;
      font-weight: 700;
      color: var(--dark);
      margin-bottom: 10px;
    }
    .service-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
    }
    .service-card .badge {
      align-self: flex-start;
      font-size: 12px;
      padding: 4px 8px;
      background: #F3F4F6;
      border-radius: 4px;
      color: var(--text-muted);
    }

    /* Feature Deep Dive */
    .feature-split {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
      margin-bottom: 60px;
    }
    .feature-text h3 {
      font-size: 26px;
      font-weight: 800;
      color: var(--dark);
      margin-bottom: 16px;
    }
    .feature-text p {
      font-size: 15px;
      color: var(--text-muted);
      margin-bottom: 20px;
    }
    .feature-points {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
      margin-bottom: 24px;
    }
    .feature-points li {
      display: flex;
      align-items: flex-start;
      gap: 10px;
      font-size: 14px;
      color: var(--text-main);
    }
    .feature-points li::before {
      content: "✓";
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 20px;
      height: 20px;
      background: var(--primary-light);
      border: 1px solid var(--primary);
      color: var(--accent);
      border-radius: 50%;
      font-weight: 800;
      font-size: 12px;
      flex-shrink: 0;
      margin-top: 2px;
    }
    .media-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }

    /* Comparison Table */
    .table-container {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      overflow-x: auto;
      box-shadow: var(--shadow-sm);
    }
    .eval-score-header {
      background: linear-gradient(135deg, #FFF9E6 0%, #FFF3C4 100%);
      padding: 24px;
      border-bottom: 1px solid var(--primary-border);
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 16px;
    }
    .eval-badge-title {
      font-size: 20px;
      font-weight: 800;
      color: var(--dark);
    }
    .eval-score-box {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .eval-stars {
      color: #FF9900;
      font-size: 20px;
      letter-spacing: 2px;
    }
    .eval-point {
      font-size: 26px;
      font-weight: 900;
      color: #D45B00;
    }
    .eval-point span {
      font-size: 14px;
      color: var(--text-muted);
      font-weight: 500;
    }
    .comp-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
    }
    .comp-table th, .comp-table td {
      padding: 16px 20px;
      font-size: 14px;
      border-bottom: 1px solid var(--border-color);
    }
    .comp-table th {
      background: #FAFBFD;
      color: var(--dark);
      font-weight: 700;
    }
    .comp-table tr:last-child td {
      border-bottom: none;
    }
    .comp-table .highlight-col {
      background: #FFFDF5;
      font-weight: 600;
      color: var(--dark);
    }

    /* Workflow Steps */
    .steps-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .step-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      position: relative;
    }
    .step-num {
      width: 36px;
      height: 36px;
      background: var(--primary);
      color: #111;
      font-weight: 800;
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 16px;
      margin-bottom: 16px;
    }
    .step-card h4 {
      font-size: 17px;
      font-weight: 700;
      color: var(--dark);
      margin-bottom: 8px;
    }
    .step-card p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* Banner Gallery */
    .banner-gallery {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin-top: 32px;
    }
    .banner-item {
      border-radius: 8px;
      overflow: hidden;
      border: 1px solid var(--border-color);
      background: #FFF;
      box-shadow: var(--shadow-sm);
    }

    /* Testimonials */
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .testimonial-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .testimonial-card:hover {
      border-color: var(--primary);
      transform: translateY(-3px);
      box-shadow: var(--shadow-md);
    }
    .testimonial-body {
      font-size: 14px;
      color: var(--text-main);
      line-height: 1.6;
      margin-bottom: 18px;
      position: relative;
    }
    .testimonial-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--border-color);
      padding-top: 14px;
    }
    .author-avatar {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: var(--primary-light);
      border: 1px solid var(--primary-border);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--accent);
      font-size: 15px;
    }
    .author-info h5 {
      font-size: 14px;
      color: var(--dark);
      font-weight: 700;
    }
    .author-info p {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* FAQ Accordion */
    .faq-wrapper {
      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;
      transition: var(--transition);
    }
    .faq-item.active {
      border-color: var(--primary);
      box-shadow: var(--shadow-sm);
    }
    .faq-question {
      padding: 18px 24px;
      font-size: 16px;
      font-weight: 700;
      color: var(--dark);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }
    .faq-question::after {
      content: "+";
      font-size: 20px;
      font-weight: 400;
      color: var(--text-muted);
      transition: var(--transition);
    }
    .faq-item.active .faq-question::after {
      content: "−";
      color: var(--accent);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      background: #FAFBFD;
    }
    .faq-answer p {
      padding: 0 24px 18px;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* Contact & Form Section */
    .contact-container {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 40px;
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 40px;
      box-shadow: var(--shadow-sm);
    }
    .contact-info h3 {
      font-size: 24px;
      font-weight: 800;
      color: var(--dark);
      margin-bottom: 12px;
    }
    .contact-info p {
      font-size: 14px;
      color: var(--text-muted);
      margin-bottom: 24px;
    }
    .info-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 14px;
      margin-bottom: 24px;
    }
    .info-list li {
      font-size: 14px;
      color: var(--text-main);
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .info-list strong {
      color: var(--dark);
      min-width: 80px;
    }
    .qr-box {
      display: flex;
      align-items: center;
      gap: 16px;
      padding: 16px;
      background: var(--primary-light);
      border: 1px solid var(--primary-border);
      border-radius: 8px;
      max-width: 320px;
    }
    .qr-img {
      width: 88px;
      height: 88px;
      border-radius: 6px;
      background: #FFF;
      padding: 4px;
    }
    .form-group {
      margin-bottom: 18px;
    }
    .form-group label {
      display: block;
      font-size: 14px;
      font-weight: 600;
      color: var(--dark);
      margin-bottom: 6px;
    }
    .form-control {
      width: 100%;
      padding: 12px 14px;
      font-size: 14px;
      border: 1px solid var(--border-color);
      border-radius: 6px;
      background: #FFFFFF;
      color: var(--text-main);
      outline: none;
      transition: var(--transition);
      font-family: inherit;
    }
    .form-control:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(255, 184, 0, 0.2);
    }
    textarea.form-control {
      resize: vertical;
      min-height: 100px;
    }

    /* Articles & Links */
    .article-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
      margin-bottom: 30px;
    }
    .article-item {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 14px 20px;
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      transition: var(--transition);
    }
    .article-item:hover {
      border-color: var(--primary);
      transform: translateX(4px);
    }
    .article-title {
      font-size: 15px;
      font-weight: 600;
      color: var(--dark);
    }
    .article-link {
      font-size: 13px;
      color: var(--accent);
      font-weight: 600;
    }

    /* Footer */
    .site-footer {
      background: #191B1F;
      color: #A0A5B1;
      padding: 60px 0 30px;
      border-top: 1px solid #282C35;
      font-size: 14px;
    }
    .footer-top {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
      padding-bottom: 40px;
      border-bottom: 1px solid #282C35;
    }
    .footer-brand h4 {
      color: #FFFFFF;
      font-size: 18px;
      margin-bottom: 14px;
    }
    .footer-brand p {
      line-height: 1.6;
      margin-bottom: 16px;
    }
    .footer-col h5 {
      color: #FFFFFF;
      font-size: 15px;
      margin-bottom: 16px;
      font-weight: 600;
    }
    .footer-col ul {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-col a {
      color: #A0A5B1;
    }
    .footer-col a:hover {
      color: var(--primary);
    }
    .footer-bottom {
      padding-top: 30px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 16px;
    }
    .friendly-links {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      align-items: center;
    }
    .friendly-links a {
      color: #A0A5B1;
      font-size: 13px;
    }
    .friendly-links a:hover {
      color: var(--primary);
    }

    /* Floating Widget */
    .floating-widget {
      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: 0 4px 16px rgba(0,0,0,0.12);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      font-size: 20px;
      color: var(--dark);
      transition: var(--transition);
    }
    .float-btn:hover {
      background: var(--primary);
      transform: scale(1.08);
    }
    .float-kefu-pop {
      position: absolute;
      right: 60px;
      bottom: 0;
      background: #FFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 16px;
      box-shadow: var(--shadow-md);
      display: none;
      width: 180px;
      text-align: center;
    }
    .float-kefu-pop.show {
      display: block;
    }

    /* Responsive */
    @media (max-width: 992px) {
      .services-grid, .testimonial-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .steps-grid, .banner-gallery {
        grid-template-columns: repeat(2, 1fr);
      }
      .hero-metrics {
        grid-template-columns: repeat(2, 1fr);
      }
      .feature-split, .contact-container {
        grid-template-columns: 1fr;
      }
      .footer-top {
        grid-template-columns: 1fr 1fr;
      }
    }
    @media (max-width: 768px) {
      .menu-toggle {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #FFFFFF;
        flex-direction: column;
        padding: 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
      }
      .nav-links.active {
        display: flex;
      }
      .hero-title {
        font-size: 28px;
      }
      .hero-desc {
        font-size: 15px;
      }
      .services-grid, .testimonial-grid, .steps-grid, .banner-gallery, .hero-metrics {
        grid-template-columns: 1fr;
      }
      .footer-top {
        grid-template-columns: 1fr;
      }
      .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
      }
    }