/* CSS Reset & Root Theme Variables (亮橙炽艳风) */
    :root {
      --primary-orange: #ff5722;
      --primary-hover: #f4511e;
      --primary-light: #fff3e0;
      --accent-flame: #ff3d00;
      --accent-gold: #ff9800;
      --bg-warm: #fcfbf9;
      --bg-white: #ffffff;
      --bg-card: #ffffff;
      --text-main: #212121;
      --text-muted: #616161;
      --text-light: #9e9e9e;
      --border-color: #f0e6df;
      --shadow-sm: 0 2px 8px rgba(255, 87, 34, 0.06);
      --shadow-md: 0 8px 24px rgba(255, 87, 34, 0.1);
      --shadow-lg: 0 16px 36px rgba(255, 87, 34, 0.14);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --transition: all 0.28s ease-in-out;
      --container-width: 1200px;
    }

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

    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-warm);
      color: var(--text-main);
      line-height: 1.65;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition);
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    ul, ol {
      list-style: none;
    }

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

    .section {
      padding: 70px 0;
      position: relative;
    }

    .section-alt {
      background-color: #fff9f5;
    }

    .section-header {
      text-align: center;
      margin-bottom: 48px;
    }

    .section-tag {
      display: inline-block;
      font-size: 0.85rem;
      font-weight: 700;
      color: var(--primary-orange);
      background: var(--primary-light);
      padding: 4px 16px;
      border-radius: 20px;
      margin-bottom: 12px;
      text-transform: uppercase;
      letter-spacing: 1px;
    }

    .section-title {
      font-size: 2.1rem;
      font-weight: 800;
      color: #1a1a1a;
      line-height: 1.35;
      margin-bottom: 12px;
    }

    .section-desc {
      font-size: 1rem;
      color: var(--text-muted);
      max-width: 760px;
      margin: 0 auto;
    }

    /* Common Buttons */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      font-size: 1rem;
      font-weight: 600;
      padding: 12px 28px;
      border-radius: var(--radius-sm);
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition);
      white-space: nowrap;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--accent-gold), var(--primary-orange));
      color: #ffffff;
      box-shadow: 0 4px 14px rgba(255, 87, 34, 0.35);
    }

    .btn-primary:hover {
      background: linear-gradient(135deg, var(--primary-orange), var(--accent-flame));
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(255, 87, 34, 0.45);
      color: #ffffff;
    }

    .btn-outline {
      background: #ffffff;
      border-color: var(--primary-orange);
      color: var(--primary-orange);
    }

    .btn-outline:hover {
      background: var(--primary-light);
      transform: translateY(-2px);
    }

    .btn-lg {
      padding: 14px 34px;
      font-size: 1.1rem;
      border-radius: var(--radius-md);
    }

    /* Header & Navigation */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.96);
      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-area {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .ai-page-logo {
      height: 40px;
      width: auto;
      object-fit: contain;
    }

    .brand-title {
      font-size: 1.25rem;
      font-weight: 800;
      color: #1a1a1a;
      letter-spacing: -0.5px;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
    }

    .nav-links li a {
      padding: 8px 14px;
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-main);
      border-radius: var(--radius-sm);
    }

    .nav-links li a:hover {
      color: var(--primary-orange);
      background-color: var(--primary-light);
    }

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

    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      cursor: pointer;
      color: var(--text-main);
      padding: 4px 8px;
    }

    /* Hero Section (No Images Used as Required) */
    .hero-section {
      background: radial-gradient(circle at 80% 20%, #ffe0b2 0%, #fff3e0 40%, #fcfbf9 80%);
      padding: 85px 0 65px;
      position: relative;
      overflow: hidden;
      border-bottom: 1px solid var(--border-color);
    }

    .hero-content {
      text-align: center;
      max-width: 920px;
      margin: 0 auto;
      position: relative;
      z-index: 2;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: #ffffff;
      border: 1px solid #ffd8a8;
      box-shadow: var(--shadow-sm);
      padding: 6px 18px;
      border-radius: 30px;
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--primary-orange);
      margin-bottom: 24px;
    }

    .hero-badge span.dot {
      width: 8px;
      height: 8px;
      background: var(--accent-flame);
      border-radius: 50%;
      display: inline-block;
      animation: pulseDot 2s infinite;
    }

    @keyframes pulseDot {
      0% { transform: scale(0.9); opacity: 0.7; }
      50% { transform: scale(1.3); opacity: 1; }
      100% { transform: scale(0.9); opacity: 0.7; }
    }

    .hero-title {
      font-size: 2.6rem;
      font-weight: 900;
      color: #111111;
      line-height: 1.28;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-title .highlight {
      color: var(--primary-orange);
      position: relative;
      display: inline-block;
    }

    .hero-title .highlight::after {
      content: "";
      position: absolute;
      bottom: 4px;
      left: 0;
      width: 100%;
      height: 8px;
      background: rgba(255, 87, 34, 0.18);
      border-radius: 4px;
      z-index: -1;
    }

    .hero-desc {
      font-size: 1.15rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 36px;
      max-width: 800px;
      margin-left: auto;
      margin-right: auto;
    }

    .hero-buttons {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 44px;
    }

    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px 16px;
      box-shadow: var(--shadow-sm);
    }

    .hero-stat-item {
      text-align: center;
    }

    .stat-value {
      font-size: 1.65rem;
      font-weight: 800;
      color: var(--primary-orange);
      margin-bottom: 4px;
    }

    .stat-label {
      font-size: 0.88rem;
      color: var(--text-muted);
    }

    /* Model Logos Matrix */
    .model-tags-wrapper {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 24px;
    }

    .model-tag {
      font-size: 0.82rem;
      font-weight: 600;
      color: #333333;
      background: #ffffff;
      border: 1px solid #ffe0b2;
      padding: 6px 14px;
      border-radius: 20px;
      transition: var(--transition);
    }

    .model-tag:hover {
      border-color: var(--primary-orange);
      background: var(--primary-light);
      color: var(--primary-orange);
      transform: translateY(-2px);
    }

    /* Service & Capability Cards */
    .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: 30px;
    }

    .card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px 24px;
      transition: var(--transition);
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: #ffccbc;
    }

    .card-icon {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      background: var(--primary-light);
      color: var(--primary-orange);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      margin-bottom: 18px;
    }

    .card-title {
      font-size: 1.18rem;
      font-weight: 700;
      margin-bottom: 10px;
      color: #1a1a1a;
    }

    .card-desc {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* Process Flow */
    .process-timeline {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }

    .process-step {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px 20px;
      position: relative;
    }

    .step-number {
      font-size: 1.8rem;
      font-weight: 900;
      color: #ffab91;
      margin-bottom: 8px;
    }

    .step-title {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 8px;
      color: #1a1a1a;
    }

    .step-desc {
      font-size: 0.88rem;
      color: var(--text-muted);
    }

    /* Comparison Table Component */
    .table-container {
      background: #ffffff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      overflow-x: auto;
    }

    .comparison-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 680px;
    }

    .comparison-table th,
    .comparison-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
      font-size: 0.95rem;
    }

    .comparison-table th {
      background: #fff3e0;
      color: #1a1a1a;
      font-weight: 700;
    }

    .comparison-table tr:last-child td {
      border-bottom: none;
    }

    .score-badge {
      display: inline-block;
      background: var(--primary-orange);
      color: #ffffff;
      font-weight: 800;
      padding: 4px 12px;
      border-radius: 6px;
      font-size: 0.95rem;
    }

    .text-highlight {
      color: var(--primary-orange);
      font-weight: 700;
    }

    /* Media & Case Gallery */
    .media-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

    .media-card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-3px);
    }

    .media-img-holder {
      aspect-ratio: 16/9;
      background: #f0f0f0;
      overflow: hidden;
    }

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

    .media-img-holder img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }

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

    .media-card-body {
      padding: 18px 20px;
    }

    .media-tag {
      font-size: 0.78rem;
      color: var(--primary-orange);
      font-weight: 700;
      margin-bottom: 6px;
      display: inline-block;
    }

    .media-title {
      font-size: 1.05rem;
      font-weight: 700;
      margin-bottom: 6px;
      color: #1a1a1a;
    }

    .media-desc {
      font-size: 0.88rem;
      color: var(--text-muted);
    }

    /* Testimonials (6 User Reviews) */
    .testimonial-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .testimonial-quote {
      font-size: 0.92rem;
      color: var(--text-main);
      line-height: 1.65;
      margin-bottom: 18px;
    }

    .testimonial-user {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #f5f0ec;
      padding-top: 14px;
    }

    .user-avatar {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--accent-gold), var(--primary-orange));
      color: #ffffff;
      font-weight: 700;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1rem;
    }

    .user-meta-name {
      font-size: 0.95rem;
      font-weight: 700;
      color: #1a1a1a;
    }

    .user-meta-role {
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    /* FAQ Accordion */
    .faq-list {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }

    .faq-question {
      width: 100%;
      text-align: left;
      background: none;
      border: none;
      padding: 18px 22px;
      font-size: 1.02rem;
      font-weight: 700;
      color: #1a1a1a;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
    }

    .faq-question:hover {
      color: var(--primary-orange);
    }

    .faq-icon {
      font-size: 1.2rem;
      transition: transform 0.25s ease;
      color: var(--primary-orange);
    }

    .faq-answer {
      display: none;
      padding: 0 22px 18px;
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.65;
      border-top: 1px solid #faf5f2;
    }

    .faq-item.active .faq-answer {
      display: block;
    }

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

    /* Articles & Links Component */
    .article-link-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .article-item {
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 16px 20px;
      border-radius: var(--radius-sm);
      transition: var(--transition);
    }

    .article-item:hover {
      border-color: var(--primary-orange);
      transform: translateX(4px);
    }

    .article-title {
      font-size: 0.96rem;
      font-weight: 600;
      color: #212121;
    }

    .article-item:hover .article-title {
      color: var(--primary-orange);
    }

    .article-arrow {
      color: var(--primary-orange);
      font-weight: 700;
    }

    /* Form Section */
    .form-wrapper {
      background: #ffffff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      padding: 36px 30px;
      box-shadow: var(--shadow-sm);
    }

    .form-group {
      margin-bottom: 20px;
    }

    .form-label {
      display: block;
      font-size: 0.92rem;
      font-weight: 600;
      color: #333333;
      margin-bottom: 8px;
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid #dcd3cd;
      border-radius: var(--radius-sm);
      font-size: 0.95rem;
      color: #212121;
      outline: none;
      background-color: #faf8f6;
      transition: var(--transition);
    }

    .form-control:focus {
      border-color: var(--primary-orange);
      background-color: #ffffff;
      box-shadow: 0 0 0 3px rgba(255, 87, 34, 0.15);
    }

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

    /* Contact Info Box */
    .contact-info-box {
      background: linear-gradient(145deg, #fff7f2, #fff0e6);
      border: 1px solid #ffd8c4;
      border-radius: var(--radius-md);
      padding: 32px 28px;
      display: flex;
      flex-direction: column;
      gap: 20px;
    }

    .contact-row {
      display: flex;
      align-items: flex-start;
      gap: 14px;
    }

    .contact-icon-bubble {
      width: 38px;
      height: 38px;
      border-radius: 10px;
      background: var(--primary-orange);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      flex-shrink: 0;
    }

    .contact-meta-label {
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    .contact-meta-value {
      font-size: 1rem;
      font-weight: 700;
      color: #1a1a1a;
    }

    .qr-card-holder {
      text-align: center;
      background: #ffffff;
      padding: 16px;
      border-radius: var(--radius-sm);
      border: 1px solid #ffe0b2;
      margin-top: 10px;
    }

    .qr-card-holder img {
      width: 140px;
      height: 140px;
      margin: 0 auto 10px;
      border-radius: 6px;
      object-fit: contain;
    }

    .qr-label {
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--text-main);
    }

    /* Footer Styles */
    .site-footer {
      background-color: #1e1b19;
      color: #b0a8a0;
      padding: 60px 0 24px;
      border-top: 3px solid var(--primary-orange);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 36px;
      margin-bottom: 40px;
    }

    .footer-brand h4 {
      color: #ffffff;
      font-size: 1.3rem;
      margin-bottom: 14px;
      font-weight: 800;
    }

    .footer-desc {
      font-size: 0.88rem;
      line-height: 1.7;
      margin-bottom: 16px;
    }

    .footer-heading {
      color: #ffffff;
      font-size: 1.05rem;
      font-weight: 700;
      margin-bottom: 18px;
    }

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

    .footer-links-list a {
      color: #b0a8a0;
      font-size: 0.9rem;
    }

    .footer-links-list a:hover {
      color: var(--primary-orange);
      padding-left: 4px;
    }

    .friend-links-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 12px;
    }

    .friend-links-wrap a {
      color: #b0a8a0;
      font-size: 0.85rem;
      background: #2a2522;
      padding: 4px 10px;
      border-radius: 4px;
    }

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

    .footer-bottom {
      border-top: 1px solid #332d29;
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 0.85rem;
      color: #857c74;
    }

    .footer-bottom a {
      color: #857c74;
    }

    .footer-bottom a:hover {
      color: #ffffff;
    }

    /* Floating Widget */
    .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: linear-gradient(135deg, var(--accent-gold), var(--primary-orange));
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 16px rgba(255, 87, 34, 0.4);
      cursor: pointer;
      border: none;
      transition: var(--transition);
      font-size: 1.2rem;
      text-decoration: none;
    }

    .float-btn:hover {
      transform: scale(1.08);
      background: linear-gradient(135deg, var(--primary-orange), var(--accent-flame));
      color: #ffffff;
    }

    .scroll-top-btn {
      display: none;
      background: #ffffff;
      color: var(--primary-orange);
      border: 1px solid #ffd8c4;
      box-shadow: var(--shadow-sm);
    }

    .scroll-top-btn:hover {
      background: var(--primary-light);
      color: var(--primary-orange);
    }

    /* Responsive Media Queries */
    @media (max-width: 992px) {
      .grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-3 {
        grid-template-columns: repeat(2, 1fr);
      }
      .process-timeline {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .hero-title {
        font-size: 2.1rem;
      }
      .hero-stats-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .mobile-menu-btn {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #ffffff;
        flex-direction: column;
        padding: 16px 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
      }
      .nav-links.show {
        display: flex;
      }
      .nav-links li {
        width: 100%;
      }
      .nav-links li a {
        display: block;
        padding: 10px 14px;
      }
      .nav-actions {
        display: none;
      }
      .grid-3, .grid-2, .grid-4 {
        grid-template-columns: 1fr;
      }
      .process-timeline {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .footer-bottom {
        flex-direction: column;
        gap: 12px;
        text-align: center;
      }
      .hero-title {
        font-size: 1.75rem;
      }
      .section-title {
        font-size: 1.7rem;
      }
    }