:root {
      --primary: #FF5A36;
      --secondary: #2E5BFF;
      --accent-yellow: #FFD13B;
      --accent-green: #00D084;
      --accent-purple: #8B5CF6;
      --bg-light: #FDFBF7;
      --bg-card: #FFFFFF;
      --text-dark: #1E232A;
      --text-muted: #57606A;
      --border-dark: #1E232A;
      --radius-sm: 8px;
      --radius-md: 16px;
      --radius-lg: 24px;
      --shadow-graffiti: 4px 4px 0px var(--border-dark);
      --shadow-graffiti-lg: 8px 8px 0px var(--border-dark);
      --shadow-hover: 2px 2px 0px var(--border-dark);
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      -webkit-tap-highlight-color: transparent;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-light);
      color: var(--text-dark);
      line-height: 1.6;
      overflow-x: hidden;
      background-image: 
        radial-gradient(var(--accent-yellow) 1px, transparent 1px),
        radial-gradient(var(--secondary) 1px, transparent 1px);
      background-size: 40px 40px;
      background-position: 0 0, 20px 20px;
    }
    a {
      color: inherit;
      text-decoration: none;
    }
    .container {
      width: 100%;
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }
    /* Graffiti Badges & Accents */
    .graffiti-tag {
      display: inline-block;
      padding: 4px 12px;
      font-weight: 800;
      font-size: 13px;
      text-transform: uppercase;
      letter-spacing: 0.5px;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-sm);
      background-color: var(--accent-yellow);
      box-shadow: 2px 2px 0px var(--border-dark);
      margin-bottom: 12px;
    }
    .graffiti-box {
      background: var(--bg-card);
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-graffiti);
      transition: all 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
    }
    .graffiti-box:hover {
      transform: translate(-2px, -2px);
      box-shadow: var(--shadow-graffiti-lg);
    }
    /* Header & Navigation */
    header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(253, 251, 247, 0.95);
      backdrop-filter: blur(8px);
      border-bottom: 2px solid var(--border-dark);
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 76px;
    }
    .brand-logo-area {
      display: flex;
      align-items: center;
      gap: 12px;
      text-decoration: none;
    }
    .brand-logo-area .ai-page-logo {
      height: 42px;
      width: auto;
      display: block;
      border-radius: var(--radius-sm);
    }
    .brand-name {
      font-size: 22px;
      font-weight: 900;
      color: var(--text-dark);
      letter-spacing: -0.5px;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
    }
    .nav-links li a {
      font-weight: 700;
      font-size: 14px;
      padding: 8px 12px;
      border-radius: var(--radius-sm);
      color: var(--text-dark);
      transition: background 0.15s ease;
    }
    .nav-links li a:hover {
      background: var(--accent-yellow);
    }
    .header-actions {
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .btn-graffiti {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 20px;
      font-weight: 800;
      font-size: 14px;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-sm);
      cursor: pointer;
      text-decoration: none;
      box-shadow: var(--shadow-graffiti);
      transition: all 0.15s ease;
      background: var(--primary);
      color: #FFFFFF;
    }
    .btn-graffiti:hover {
      transform: translate(2px, 2px);
      box-shadow: var(--shadow-hover);
    }
    .btn-yellow {
      background: var(--accent-yellow);
      color: var(--text-dark);
    }
    .btn-blue {
      background: var(--secondary);
      color: #FFFFFF;
    }
    .mobile-menu-toggle {
      display: none;
      background: none;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-sm);
      padding: 8px 10px;
      cursor: pointer;
      font-weight: 900;
      box-shadow: 2px 2px 0 var(--border-dark);
    }
    /* Section Shared Styling */
    section {
      padding: 64px 0;
      position: relative;
    }
    .section-header {
      text-align: center;
      max-width: 780px;
      margin: 0 auto 44px;
    }
    .section-header h2 {
      font-size: 32px;
      font-weight: 900;
      color: var(--text-dark);
      margin-bottom: 12px;
      position: relative;
      display: inline-block;
    }
    .section-header p {
      font-size: 16px;
      color: var(--text-muted);
      font-weight: 500;
    }
    /* Hero Section - STRICT NO IMAGES */
    .hero-section {
      padding: 70px 0 60px;
      text-align: center;
      background: linear-gradient(180deg, rgba(255, 209, 59, 0.15) 0%, rgba(253, 251, 247, 0) 100%);
      border-bottom: 2px dashed var(--border-dark);
    }
    .hero-content {
      max-width: 860px;
      margin: 0 auto;
    }
    .hero-title {
      font-size: 40px;
      line-height: 1.25;
      font-weight: 900;
      color: var(--text-dark);
      margin-bottom: 20px;
      letter-spacing: -1px;
    }
    .hero-title span {
      background: var(--accent-yellow);
      padding: 0 8px;
      border-radius: 4px;
      border: 2px solid var(--border-dark);
      box-shadow: 3px 3px 0 var(--border-dark);
      display: inline-block;
      margin-top: 4px;
    }
    .hero-desc {
      font-size: 18px;
      color: var(--text-muted);
      font-weight: 600;
      max-width: 720px;
      margin: 0 auto 30px;
    }
    .hero-actions {
      display: flex;
      justify-content: center;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 40px;
    }
    .hero-actions .btn-hero-main {
      padding: 14px 32px;
      font-size: 18px;
      box-shadow: 6px 6px 0 var(--border-dark);
    }
    .hero-feature-tags {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 12px;
    }
    .hero-tag-item {
      padding: 8px 16px;
      background: #FFFFFF;
      border: 2px solid var(--border-dark);
      border-radius: 30px;
      font-size: 13px;
      font-weight: 800;
      box-shadow: 2px 2px 0 var(--border-dark);
    }
    /* Stats Row */
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 40px;
    }
    .stat-card {
      padding: 24px;
      text-align: center;
      background: #FFFFFF;
    }
    .stat-number {
      font-size: 36px;
      font-weight: 900;
      color: var(--primary);
      line-height: 1.1;
      margin-bottom: 6px;
    }
    .stat-label {
      font-size: 14px;
      font-weight: 700;
      color: var(--text-muted);
    }
    /* Model Matrix Badge Grid */
    .model-badge-container {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 24px;
    }
    .model-badge {
      background: #FFFFFF;
      border: 2px solid var(--border-dark);
      padding: 6px 14px;
      border-radius: 20px;
      font-size: 13px;
      font-weight: 700;
      box-shadow: 2px 2px 0 var(--border-dark);
      transition: transform 0.15s ease;
    }
    .model-badge:hover {
      transform: scale(1.05);
      background: var(--accent-yellow);
    }
    /* Services & Capabilities Grid */
    .card-grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .card-grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }
    .card-grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .service-card {
      padding: 28px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .service-card-title {
      font-size: 20px;
      font-weight: 900;
      margin-bottom: 12px;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .service-card-desc {
      font-size: 14px;
      color: var(--text-muted);
      margin-bottom: 16px;
      line-height: 1.6;
    }
    .service-card-foot {
      font-size: 13px;
      font-weight: 800;
      color: var(--secondary);
    }
    /* Image Showcase Blocks */
    .media-showcase-grid {
      display: grid;
      grid-template-columns: 2fr 1fr;
      gap: 24px;
      align-items: center;
    }
    .media-frame {
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-graffiti);
      background: #FFFFFF;
    }
    .media-frame img {
      width: 100%;
      height: auto;
      display: block;
      object-fit: cover;
    }
    /* Comparison Table */
    .comparison-table-wrapper {
      overflow-x: auto;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-md);
      background: #FFFFFF;
      box-shadow: var(--shadow-graffiti);
    }
    .comparison-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
    }
    .comparison-table th, .comparison-table td {
      padding: 16px 20px;
      border-bottom: 2px solid var(--border-dark);
      font-size: 14px;
    }
    .comparison-table th {
      background: #FFF4D2;
      font-weight: 900;
      font-size: 15px;
    }
    .comparison-table tr:last-child td {
      border-bottom: none;
    }
    .comparison-table .highlight-col {
      background: rgba(255, 90, 54, 0.06);
      font-weight: 800;
      color: var(--primary);
    }
    /* Score Banner */
    .score-banner {
      background: var(--accent-yellow);
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 24px 32px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      box-shadow: var(--shadow-graffiti);
      margin-bottom: 28px;
    }
    .score-banner-left {
      display: flex;
      align-items: center;
      gap: 20px;
    }
    .score-number {
      font-size: 48px;
      font-weight: 900;
      line-height: 1;
      color: var(--text-dark);
    }
    .stars {
      color: var(--primary);
      font-size: 24px;
      letter-spacing: 2px;
    }
    /* FAQ Accordion */
    .faq-list {
      display: flex;
      flex-direction: column;
      gap: 16px;
      max-width: 900px;
      margin: 0 auto;
    }
    .faq-item {
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-md);
      background: #FFFFFF;
      box-shadow: var(--shadow-graffiti);
      overflow: hidden;
    }
    .faq-question {
      padding: 18px 24px;
      font-weight: 800;
      font-size: 16px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: #FFFFFF;
      user-select: none;
    }
    .faq-question::after {
      content: '+';
      font-size: 22px;
      font-weight: 900;
      color: var(--primary);
      transition: transform 0.2s;
    }
    .faq-item.active .faq-question::after {
      content: '-';
      transform: rotate(180deg);
    }
    .faq-answer {
      padding: 0 24px;
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.25s ease-out, padding 0.25s ease;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      background: #FAFAFA;
      border-top: 1px dashed transparent;
    }
    .faq-item.active .faq-answer {
      padding: 16px 24px;
      max-height: 300px;
      border-top-color: #E2E8F0;
    }
    /* User Reviews */
    .review-card {
      padding: 24px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .review-text {
      font-size: 14px;
      font-style: italic;
      color: var(--text-dark);
      margin-bottom: 20px;
      line-height: 1.6;
    }
    .review-user-info {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #E2E8F0;
      padding-top: 12px;
    }
    .review-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      border: 2px solid var(--border-dark);
      background: var(--accent-yellow);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 900;
      font-size: 16px;
    }
    .review-meta h4 {
      font-size: 14px;
      font-weight: 800;
    }
    .review-meta span {
      font-size: 12px;
      color: var(--text-muted);
    }
    /* Demand Form Section */
    .form-wrapper {
      background: #FFFFFF;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: var(--shadow-graffiti-lg);
      max-width: 800px;
      margin: 0 auto;
    }
    .form-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
    }
    .form-group {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }
    .form-group.full-width {
      grid-column: span 2;
    }
    .form-label {
      font-size: 14px;
      font-weight: 800;
    }
    .form-input, .form-select, .form-textarea {
      width: 100%;
      padding: 12px 16px;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-sm);
      font-size: 14px;
      font-family: inherit;
      background: #FDFBF7;
      outline: none;
      transition: background 0.15s;
    }
    .form-input:focus, .form-select:focus, .form-textarea:focus {
      background: #FFFFFF;
      border-color: var(--secondary);
    }
    .form-textarea {
      resize: vertical;
      min-height: 100px;
    }
    /* Articles List */
    .article-link-list {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 20px;
    }
    .article-item {
      background: #FFFFFF;
      border: 2px solid var(--border-dark);
      padding: 10px 18px;
      border-radius: var(--radius-sm);
      font-size: 14px;
      font-weight: 700;
      box-shadow: 2px 2px 0 var(--border-dark);
      transition: transform 0.15s;
    }
    .article-item:hover {
      transform: translateY(-2px);
      background: var(--accent-yellow);
    }
    /* Contact & QR Card */
    .contact-layout {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 32px;
    }
    .qr-card {
      text-align: center;
      padding: 24px;
      background: #FFF4D2;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
    }
    .qr-card img {
      max-width: 180px;
      height: auto;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-sm);
      margin-bottom: 12px;
      background: #FFF;
    }
    .contact-info-list {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .contact-info-item {
      display: flex;
      align-items: center;
      gap: 16px;
      padding: 16px;
      background: #FFFFFF;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-sm);
      box-shadow: 2px 2px 0 var(--border-dark);
      font-weight: 700;
    }
    /* Footer */
    footer {
      background: #FFFFFF;
      border-top: 2px solid var(--border-dark);
      padding: 48px 0 24px;
      color: var(--text-dark);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 32px;
      margin-bottom: 36px;
    }
    .footer-col h4 {
      font-size: 16px;
      font-weight: 900;
      margin-bottom: 16px;
      display: inline-block;
      border-bottom: 2px solid var(--accent-yellow);
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }
    .footer-links li a {
      font-size: 14px;
      color: var(--text-muted);
      font-weight: 600;
      transition: color 0.15s;
    }
    .footer-links li a:hover {
      color: var(--primary);
    }
    .friendly-links {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      padding-top: 16px;
      border-top: 1px dashed var(--border-dark);
      margin-bottom: 24px;
    }
    .friendly-links a {
      font-size: 13px;
      color: var(--text-muted);
      font-weight: 600;
      padding: 4px 8px;
      background: var(--bg-light);
      border: 1px solid var(--border-dark);
      border-radius: 4px;
    }
    .friendly-links a:hover {
      background: var(--accent-yellow);
      color: var(--text-dark);
    }
    .footer-bottom {
      text-align: center;
      padding-top: 20px;
      border-top: 2px solid var(--border-dark);
      font-size: 13px;
      font-weight: 700;
      color: var(--text-muted);
    }
    /* Float Service Button */
    .float-contact {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .float-btn {
      width: 50px;
      height: 50px;
      border-radius: 50%;
      background: var(--accent-yellow);
      border: 2px solid var(--border-dark);
      box-shadow: 3px 3px 0 var(--border-dark);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 900;
      font-size: 13px;
      cursor: pointer;
      text-decoration: none;
      color: var(--text-dark);
    }
    .float-btn:hover {
      transform: scale(1.08);
    }
    /* Responsive Breakpoints */
    @media (max-width: 992px) {
      .card-grid-3, .card-grid-4, .stats-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .media-showcase-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .contact-layout {
        grid-template-columns: 1fr;
      }
    }
    @media (max-width: 768px) {
      .header-inner {
        height: 64px;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        width: 100%;
        background: #FDFBF7;
        border-bottom: 2px solid var(--border-dark);
        flex-direction: column;
        padding: 16px 20px;
      }
      .nav-links.active {
        display: flex;
      }
      .nav-links li {
        width: 100%;
      }
      .nav-links li a {
        display: block;
        padding: 10px 0;
        border-bottom: 1px dashed #E2E8F0;
      }
      .mobile-menu-toggle {
        display: block;
      }
      .hero-title {
        font-size: 28px;
      }
      .card-grid-2, .card-grid-3, .card-grid-4, .stats-grid {
        grid-template-columns: 1fr;
      }
      .form-grid {
        grid-template-columns: 1fr;
      }
      .form-group.full-width {
        grid-column: span 1;
      }
      .score-banner {
        flex-direction: column;
        gap: 16px;
        text-align: center;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }