/* CSS Reset & Variables (多彩涂鸦创意商务风) */
    :root {
      --bg-main: #fdfbf7;
      --bg-card: #ffffff;
      --text-main: #1f2421;
      --text-muted: #596157;
      --color-primary: #ff4757;
      --color-secondary: #2ed573;
      --color-accent: #ffa502;
      --color-blue: #1e90ff;
      --color-purple: #9b59b6;
      --border-dark: #1f2421;
      --shadow-solid: 4px 4px 0px #1f2421;
      --shadow-hover: 6px 6px 0px #1f2421;
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      --container-width: 1200px;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: var(--font-family);
      background-color: var(--bg-main);
      color: var(--text-main);
      line-height: 1.6;
      overflow-x: hidden;
      background-image: radial-gradient(#e0ded8 1.5px, transparent 1.5px);
      background-size: 24px 24px;
    }

    a {
      color: inherit;
      text-decoration: none;
    }

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

    /* Doodle & Badge Elements */
    .badge {
      display: inline-block;
      padding: 6px 14px;
      font-size: 13px;
      font-weight: 700;
      border-radius: 30px;
      border: 2px solid var(--border-dark);
      background: var(--color-accent);
      color: var(--border-dark);
      box-shadow: 2px 2px 0px var(--border-dark);
      margin-bottom: 12px;
      text-transform: uppercase;
    }

    .badge-pink { background: #ff7675; color: #fff; }
    .badge-green { background: var(--color-secondary); color: #1f2421; }
    .badge-blue { background: #74b9ff; color: #1f2421; }

    /* Button Styles */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 12px 24px;
      font-size: 15px;
      font-weight: 700;
      border-radius: var(--radius-sm);
      border: 2px solid var(--border-dark);
      cursor: pointer;
      transition: all 0.2s ease;
      text-align: center;
    }

    .btn-primary {
      background: var(--color-primary);
      color: #ffffff;
      box-shadow: var(--shadow-solid);
    }
    .btn-primary:hover {
      transform: translate(-2px, -2px);
      box-shadow: var(--shadow-hover);
      background: #ff3848;
    }

    .btn-action {
      background: var(--color-accent);
      color: var(--border-dark);
      box-shadow: var(--shadow-solid);
    }
    .btn-action:hover {
      transform: translate(-2px, -2px);
      box-shadow: var(--shadow-hover);
      background: #ff9400;
    }

    .btn-outline {
      background: #ffffff;
      color: var(--border-dark);
      box-shadow: var(--shadow-solid);
    }
    .btn-outline:hover {
      transform: translate(-2px, -2px);
      box-shadow: var(--shadow-hover);
      background: #f1f2f6;
    }

    /* Header & Navigation */
    header.site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(253, 251, 247, 0.95);
      border-bottom: 2px solid var(--border-dark);
      backdrop-filter: blur(8px);
    }

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

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

    .brand-logo img {
      max-height: 44px;
      width: auto;
      object-fit: contain;
    }

    .brand-name {
      font-size: 20px;
      font-weight: 900;
      color: var(--text-main);
      letter-spacing: -0.5px;
    }

    .nav-links {
      display: flex;
      gap: 0;
      list-style: none;
      align-items: center;
    }

    .nav-links a {
      font-size: 14px;
      font-weight: 700;
      color: var(--text-main);
      padding: 8px 12px;
      border-radius: var(--radius-sm);
      transition: background 0.2s;
    }

    .nav-links a:hover {
      background: #e4e7eb;
    }

    .nav-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .mobile-menu-btn {
      display: none;
      background: none;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-sm);
      padding: 6px 10px;
      font-weight: bold;
      cursor: pointer;
    }

    /* Section Global */
    section {
      padding: 70px 0;
      position: relative;
    }

    .section-header {
      text-align: center;
      max-width: 780px;
      margin: 0 auto 48px;
    }

    .section-title {
      font-size: 32px;
      font-weight: 900;
      margin-bottom: 12px;
      color: var(--text-main);
      position: relative;
      display: inline-block;
    }

    .section-title::after {
      content: "";
      position: absolute;
      bottom: -6px;
      left: 15%;
      width: 70%;
      height: 6px;
      background: var(--color-accent);
      border-radius: 3px;
      z-index: -1;
    }

    .section-desc {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* Hero Section (No Images in Hero) */
    .hero-section {
      padding: 80px 0 60px;
      background: linear-gradient(180deg, #fff2e6 0%, var(--bg-main) 100%);
      border-bottom: 2px dashed var(--border-dark);
    }

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

    .hero-title {
      font-size: 42px;
      font-weight: 900;
      line-height: 1.25;
      margin: 16px 0 20px;
      color: var(--text-main);
    }

    .hero-title span {
      background: linear-gradient(120deg, var(--color-primary), var(--color-purple));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      border-bottom: 3px dashed var(--color-primary);
    }

    .hero-subtitle {
      font-size: 18px;
      color: var(--text-muted);
      margin-bottom: 32px;
      line-height: 1.7;
    }

    .hero-cta-group {
      display: flex;
      justify-content: center;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 40px;
    }

    .hero-cta-highlight {
      font-size: 17px;
      padding: 14px 32px;
    }

    .hero-feature-tags {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
    }

    .feature-tag-item {
      background: #ffffff;
      border: 1.5px solid var(--border-dark);
      padding: 6px 14px;
      border-radius: 20px;
      font-size: 13px;
      font-weight: 600;
      box-shadow: 2px 2px 0px var(--border-dark);
    }

    /* Stats Grid */
    .stats-container {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: -30px;
      position: relative;
      z-index: 10;
    }

    .stat-card {
      background: #ffffff;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 24px;
      text-align: center;
      box-shadow: var(--shadow-solid);
    }

    .stat-card:nth-child(1) { background: #fff0f3; }
    .stat-card:nth-child(2) { background: #e8f5e9; }
    .stat-card:nth-child(3) { background: #e3f2fd; }
    .stat-card:nth-child(4) { background: #fff8e1; }

    .stat-num {
      font-size: 32px;
      font-weight: 900;
      color: var(--border-dark);
      margin-bottom: 4px;
    }

    .stat-label {
      font-size: 14px;
      font-weight: 600;
      color: var(--text-muted);
    }

    /* Cards Grid Common */
    .cards-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
      gap: 24px;
    }

    .doodle-card {
      background: var(--bg-card);
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-solid);
      transition: all 0.2s ease;
      display: flex;
      flex-direction: column;
    }

    .doodle-card:hover {
      transform: translate(-3px, -3px);
      box-shadow: var(--shadow-hover);
    }

    .card-icon {
      width: 48px;
      height: 48px;
      border-radius: var(--radius-sm);
      border: 2px solid var(--border-dark);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 24px;
      margin-bottom: 16px;
      box-shadow: 2px 2px 0px var(--border-dark);
    }

    .doodle-card h3 {
      font-size: 18px;
      font-weight: 800;
      margin-bottom: 10px;
    }

    .doodle-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
    }

    /* Model Logos Matrix */
    .models-matrix {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      justify-content: center;
      margin-top: 30px;
    }

    .model-chip {
      background: #ffffff;
      border: 2px solid var(--border-dark);
      padding: 8px 16px;
      border-radius: 8px;
      font-size: 14px;
      font-weight: 700;
      box-shadow: 2px 2px 0px var(--border-dark);
    }

    /* Comparison Table Section */
    .table-container {
      background: #ffffff;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-solid);
      overflow-x: auto;
    }

    .rating-banner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      background: #ffeaa7;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-sm);
      padding: 16px 24px;
      margin-bottom: 24px;
      box-shadow: 2px 2px 0px var(--border-dark);
    }

    .rating-banner-left {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .rating-score {
      font-size: 32px;
      font-weight: 900;
      color: var(--color-primary);
    }

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
    }

    .compare-table th, .compare-table td {
      padding: 16px;
      border-bottom: 2px solid #edeff2;
      font-size: 14px;
    }

    .compare-table th {
      background: #f8f9fa;
      font-weight: 800;
      border-bottom: 2px solid var(--border-dark);
    }

    .compare-table tr:hover td {
      background: #fafbfc;
    }

    .badge-highlight {
      background: #d4edda;
      color: #155724;
      font-weight: 700;
      padding: 4px 8px;
      border-radius: 4px;
      border: 1px solid #c3e6cb;
    }

    /* Visual Showcase Images */
    .media-showcase-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }

    .media-card {
      background: #ffffff;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-solid);
      display: flex;
      flex-direction: column;
    }

    .media-img-wrapper {
      width: 100%;
      aspect-ratio: 16/9;
      background: #f0f0f0;
      overflow: hidden;
      border-bottom: 2px solid var(--border-dark);
    }

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

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

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

    .media-info {
      padding: 20px;
    }

    /* FAQ Accordion */
    .faq-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 20px;
    }

    .faq-item {
      background: #ffffff;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-sm);
      box-shadow: var(--shadow-solid);
      overflow: hidden;
    }

    .faq-question {
      padding: 18px 20px;
      font-size: 16px;
      font-weight: 800;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: #ffffff;
      user-select: none;
      transition: background 0.2s;
    }

    .faq-question:hover {
      background: #fdf6e2;
    }

    .faq-icon {
      font-size: 18px;
      transition: transform 0.3s;
    }

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease-out;
      background: #fafafa;
      border-top: 1px dashed var(--border-dark);
      padding: 0 20px;
    }

    .faq-answer p {
      padding: 16px 0;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
    }

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

    .review-card {
      background: #ffffff;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-solid);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .review-stars {
      color: #ff9f43;
      font-size: 16px;
      margin-bottom: 12px;
    }

    .review-text {
      font-size: 14px;
      color: var(--text-main);
      line-height: 1.6;
      margin-bottom: 20px;
      font-style: italic;
    }

    .review-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px dashed #ddd;
      padding-top: 14px;
    }

    .author-avatar {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: #ffeaa7;
      border: 2px solid var(--border-dark);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 16px;
    }

    .author-info h4 {
      font-size: 14px;
      font-weight: 800;
    }

    .author-info span {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* Contact & Form Section */
    .contact-layout {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 36px;
      background: #ffffff;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-solid);
    }

    .contact-info-panel h3 {
      font-size: 24px;
      font-weight: 900;
      margin-bottom: 16px;
    }

    .contact-details-list {
      list-style: none;
      margin: 24px 0;
    }

    .contact-details-list li {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 15px;
      margin-bottom: 14px;
      font-weight: 600;
    }

    .qr-wrapper {
      margin-top: 24px;
      background: #fdfbf7;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-sm);
      padding: 16px;
      display: inline-block;
      text-align: center;
      box-shadow: 2px 2px 0px var(--border-dark);
    }

    .qr-wrapper img {
      width: 140px;
      height: 140px;
      object-fit: contain;
      border-radius: 4px;
    }

    .qr-label {
      font-size: 13px;
      font-weight: bold;
      margin-top: 8px;
    }

    /* Form Styles */
    .form-group {
      margin-bottom: 18px;
    }

    .form-group label {
      display: block;
      font-size: 14px;
      font-weight: 800;
      margin-bottom: 6px;
    }

    .form-control {
      width: 100%;
      padding: 12px 14px;
      font-size: 14px;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-sm);
      background: #fcfcfc;
      outline: none;
      font-family: inherit;
    }

    .form-control:focus {
      background: #ffffff;
      border-color: var(--color-blue);
      box-shadow: 0 0 0 3px rgba(30, 144, 255, 0.15);
    }

    textarea.form-control {
      resize: vertical;
      min-height: 100px;
    }

    /* Articles / Knowledge Section */
    .articles-container {
      background: #ffffff;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-solid);
    }

    .article-links-list {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      gap: 12px;
      list-style: none;
      margin-top: 16px;
    }

    .article-links-list a {
      display: block;
      padding: 10px 14px;
      background: #f8f9fa;
      border: 1.5px solid var(--border-dark);
      border-radius: var(--radius-sm);
      font-size: 14px;
      font-weight: 600;
      transition: all 0.2s;
    }

    .article-links-list a:hover {
      background: var(--color-accent);
      transform: translate(-2px, -2px);
    }

    /* Footer */
    footer.site-footer {
      background: #1f2421;
      color: #f5f6fa;
      border-top: 3px solid var(--border-dark);
      padding: 60px 0 30px;
      margin-top: 60px;
    }

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

    .footer-col h4 {
      color: #ffffff;
      font-size: 16px;
      font-weight: 800;
      margin-bottom: 18px;
      border-left: 4px solid var(--color-accent);
      padding-left: 8px;
    }

    .footer-col p {
      font-size: 14px;
      color: #dcdde1;
      line-height: 1.6;
    }

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

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

    .footer-links a {
      font-size: 14px;
      color: #dcdde1;
      transition: color 0.2s;
    }

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

    .friend-links-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
    }

    .friend-links-wrap a {
      font-size: 13px;
      color: #dcdde1;
      background: #2f3640;
      padding: 4px 10px;
      border-radius: 4px;
      transition: background 0.2s;
    }

    .friend-links-wrap a:hover {
      background: var(--color-primary);
      color: #ffffff;
    }

    .footer-bottom {
      border-top: 1px solid #353b48;
      padding-top: 24px;
      text-align: center;
      font-size: 13px;
      color: #718093;
    }

    /* Float Service Tool */
    .float-service-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: 2px solid var(--border-dark);
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: var(--shadow-solid);
      cursor: pointer;
      font-size: 20px;
      transition: transform 0.2s;
    }

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

    .float-btn.top-btn {
      background: var(--color-accent);
    }

    /* Responsive */
    @media (max-width: 992px) {
      .stats-container {
        grid-template-columns: repeat(2, 1fr);
      }
      .testimonial-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .faq-grid {
        grid-template-columns: 1fr;
      }
      .media-showcase-grid {
        grid-template-columns: 1fr;
      }
      .contact-layout {
        grid-template-columns: 1fr;
      }
      .footer-layout {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 76px;
        left: 0;
        width: 100%;
        background: #ffffff;
        flex-direction: column;
        padding: 20px;
        border-bottom: 2px solid var(--border-dark);
        box-shadow: 0 10px 15px rgba(0,0,0,0.1);
      }
      .nav-links.active {
        display: flex;
      }
      .mobile-menu-btn {
        display: block;
      }
      .hero-title {
        font-size: 28px;
      }
      .stats-container {
        grid-template-columns: 1fr;
      }
      .testimonial-grid {
        grid-template-columns: 1fr;
      }
      .footer-layout {
        grid-template-columns: 1fr;
      }
    }