:root {
      --primary: #FF5500;
      --primary-hover: #E04B00;
      --primary-light: #FFF2EB;
      --secondary: #FF8A00;
      --dark-text: #1E2229;
      --body-text: #4E5969;
      --light-text: #86909C;
      --bg-page: #FAF9F6;
      --bg-card: #FFFFFF;
      --border-color: #F0E6DF;
      --container-max: 1200px;
      --shadow-sm: 0 4px 12px rgba(255, 85, 0, 0.05);
      --shadow-md: 0 8px 24px rgba(255, 85, 0, 0.08);
      --shadow-lg: 0 16px 36px rgba(255, 85, 0, 0.12);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --transition: all 0.28s ease;
    }

    * {
      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", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-page);
      color: var(--dark-text);
      line-height: 1.65;
      overflow-x: hidden;
      background-image: radial-gradient(circle at 10% 20%, rgba(255, 85, 0, 0.03) 0%, transparent 40%),
                        radial-gradient(circle at 90% 80%, rgba(255, 138, 0, 0.03) 0%, transparent 40%);
    }

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

    .container {
      width: 100%;
      max-width: var(--container-max);
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }

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

    .ai-page-logo {
      height: 38px;
      width: auto;
      display: block;
    }

    .brand-title {
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--primary);
      letter-spacing: -0.5px;
    }

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

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

    .nav-links li a:hover,
    .nav-links li a.active {
      color: var(--primary);
      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: 0.95rem;
      font-weight: 600;
      border-radius: var(--radius-sm);
      cursor: pointer;
      transition: var(--transition);
      border: 1px solid transparent;
      text-align: center;
      white-space: nowrap;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      color: #FFFFFF;
      box-shadow: 0 4px 14px rgba(255, 85, 0, 0.3);
    }

    .btn-primary:hover {
      background: linear-gradient(135deg, var(--primary-hover), var(--primary));
      transform: translateY(-2px);
      box-shadow: 0 6px 18px rgba(255, 85, 0, 0.4);
    }

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

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

    .btn-lg {
      padding: 14px 32px;
      font-size: 1.05rem;
      border-radius: var(--radius-md);
    }

    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      color: var(--dark-text);
      cursor: pointer;
      padding: 6px;
    }

    .section-padding {
      padding: 72px 0;
    }

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

    .section-badge {
      display: inline-block;
      padding: 4px 14px;
      font-size: 0.85rem;
      font-weight: 700;
      color: var(--primary);
      background: var(--primary-light);
      border-radius: 20px;
      margin-bottom: 12px;
      border: 1px solid rgba(255, 85, 0, 0.2);
    }

    .section-title {
      font-size: 2.1rem;
      font-weight: 800;
      color: var(--dark-text);
      margin-bottom: 12px;
      line-height: 1.3;
    }

    .section-subtitle {
      font-size: 1.05rem;
      color: var(--body-text);
      max-width: 720px;
      margin: 0 auto;
    }

    .hero-section {
      padding: 70px 0 60px;
      background: linear-gradient(180deg, #FFFFFF 0%, #FFF7F2 100%);
      border-bottom: 1px solid var(--border-color);
      position: relative;
    }

    .hero-content {
      text-align: center;
      max-width: 860px;
      margin: 0 auto;
    }

    .hero-title {
      font-size: 2.6rem;
      font-weight: 900;
      line-height: 1.25;
      color: #11141A;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-title .highlight {
      color: var(--primary);
      background: linear-gradient(120deg, var(--primary), var(--secondary));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-desc {
      font-size: 1.15rem;
      color: var(--body-text);
      line-height: 1.7;
      margin-bottom: 36px;
    }

    .hero-btns {
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 48px;
    }

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

    .stat-item {
      text-align: center;
      padding: 10px;
      border-right: 1px dashed var(--border-color);
    }

    .stat-item:last-child {
      border-right: none;
    }

    .stat-num {
      font-size: 2rem;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 4px;
    }

    .stat-label {
      font-size: 0.9rem;
      color: var(--body-text);
      font-weight: 500;
    }

    .model-tags-wrapper {
      margin-top: 36px;
      background: rgba(255, 255, 255, 0.7);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 16px 20px;
    }

    .model-tags-title {
      font-size: 0.85rem;
      font-weight: 700;
      color: var(--light-text);
      text-transform: uppercase;
      margin-bottom: 12px;
      letter-spacing: 0.5px;
    }

    .tags-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      justify-content: center;
    }

    .model-tag {
      font-size: 0.82rem;
      background: #FFFFFF;
      padding: 4px 10px;
      border-radius: 6px;
      color: var(--body-text);
      border: 1px solid #ECECEC;
      transition: var(--transition);
    }

    .model-tag:hover {
      border-color: var(--primary);
      color: var(--primary);
      background: var(--primary-light);
    }

    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }

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

    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .card {
      background: var(--bg-card);
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      padding: 24px;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      height: 100%;
    }

    .card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: rgba(255, 85, 0, 0.3);
    }

    .card-icon {
      width: 48px;
      height: 48px;
      background: var(--primary-light);
      color: var(--primary);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      margin-bottom: 16px;
    }

    .card-title {
      font-size: 1.2rem;
      font-weight: 700;
      color: var(--dark-text);
      margin-bottom: 10px;
    }

    .card-desc {
      font-size: 0.92rem;
      color: var(--body-text);
      line-height: 1.6;
      flex-grow: 1;
    }

    .media-card-img-wrap {
      border-radius: var(--radius-sm);
      overflow: hidden;
      margin-bottom: 16px;
      background: #F4EBE6;
      display: flex;
      justify-content: center;
      align-items: center;
    }

    .media-card-img-wrap img {
      width: 100%;
      height: auto;
      display: block;
      transition: var(--transition);
    }

    .card:hover .media-card-img-wrap img {
      transform: scale(1.02);
    }

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

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

    .step-badge {
      width: 36px;
      height: 36px;
      background: var(--primary);
      color: #FFFFFF;
      font-weight: 800;
      border-radius: 50%;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 14px;
    }

    .step-title {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 8px;
      color: var(--dark-text);
    }

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

    .compare-container {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      overflow: hidden;
    }

    .compare-score-banner {
      background: linear-gradient(135deg, #FF5500, #FF8A00);
      color: #FFFFFF;
      padding: 30px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 20px;
    }

    .score-info h3 {
      font-size: 1.5rem;
      font-weight: 800;
      margin-bottom: 6px;
    }

    .score-info p {
      font-size: 0.95rem;
      opacity: 0.95;
    }

    .score-badge-large {
      background: #FFFFFF;
      color: var(--primary);
      padding: 16px 28px;
      border-radius: var(--radius-md);
      text-align: center;
      box-shadow: 0 6px 16px rgba(0,0,0,0.1);
    }

    .score-badge-large .score-num {
      font-size: 2.2rem;
      font-weight: 900;
      line-height: 1;
    }

    .score-badge-large .stars {
      color: #FFB800;
      font-size: 1.1rem;
      margin-top: 4px;
    }

    .table-responsive {
      width: 100%;
      overflow-x: auto;
    }

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

    .compare-table th, 
    .compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid #F0F0F0;
      font-size: 0.95rem;
    }

    .compare-table th {
      background: #FAFAFA;
      color: var(--dark-text);
      font-weight: 700;
    }

    .compare-table tr:hover {
      background: var(--primary-light);
    }

    .compare-table .highlight-col {
      background: #FFFBF9;
      font-weight: 600;
      color: var(--primary);
    }

    .tag-check {
      color: #00B42A;
      font-weight: bold;
    }

    .tag-cross {
      color: #F53F3F;
    }

    .faq-list {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .faq-item {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      overflow: hidden;
      transition: var(--transition);
    }

    .faq-question {
      padding: 18px 24px;
      font-weight: 700;
      font-size: 1.05rem;
      color: var(--dark-text);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }

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

    .faq-arrow {
      font-size: 1.1rem;
      transition: transform 0.25s ease;
      color: var(--primary);
    }

    .faq-item.active .faq-arrow {
      transform: rotate(180deg);
    }

    .faq-answer {
      padding: 0 24px;
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      color: var(--body-text);
      font-size: 0.95rem;
      line-height: 1.65;
    }

    .faq-item.active .faq-answer {
      padding: 0 24px 20px;
      max-height: 300px;
    }

    .review-user {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 12px;
    }

    .user-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1.1rem;
      border: 1px solid rgba(255, 85, 0, 0.2);
    }

    .user-info h4 {
      font-size: 0.98rem;
      color: var(--dark-text);
      font-weight: 700;
    }

    .user-info span {
      font-size: 0.82rem;
      color: var(--light-text);
    }

    .review-quote {
      font-size: 0.92rem;
      color: var(--body-text);
      line-height: 1.6;
    }

    .form-box {
      background: #FFFFFF;
      padding: 36px;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
    }

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

    .form-group label {
      display: block;
      font-size: 0.92rem;
      font-weight: 600;
      color: var(--dark-text);
      margin-bottom: 8px;
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border-radius: var(--radius-sm);
      border: 1px solid #DCDFE6;
      font-size: 0.95rem;
      color: var(--dark-text);
      outline: none;
      transition: var(--transition);
      background: #FAF9F6;
    }

    .form-control:focus {
      border-color: var(--primary);
      background: #FFFFFF;
      box-shadow: 0 0 0 3px rgba(255, 85, 0, 0.15);
    }

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

    .contact-info-card {
      background: linear-gradient(135deg, #FFF9F5, #FFFFFF);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px;
      height: 100%;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .contact-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 16px;
      margin: 20px 0;
    }

    .contact-list li {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      font-size: 0.95rem;
      color: var(--body-text);
    }

    .contact-list li strong {
      color: var(--dark-text);
      min-width: 80px;
    }

    .qr-container {
      display: flex;
      align-items: center;
      gap: 20px;
      background: #FFFFFF;
      padding: 16px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
    }

    .qr-container img {
      width: 100px;
      height: 100px;
      border-radius: var(--radius-sm);
      object-fit: cover;
    }

    .qr-desc h5 {
      font-size: 1rem;
      color: var(--dark-text);
      margin-bottom: 4px;
    }

    .qr-desc p {
      font-size: 0.85rem;
      color: var(--light-text);
      line-height: 1.4;
    }

    .articles-box {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      padding: 30px;
      margin-bottom: 30px;
    }

    .links-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 14px;
    }

    .links-cloud a {
      background: var(--primary-light);
      color: var(--primary);
      padding: 6px 16px;
      border-radius: 20px;
      font-size: 0.9rem;
      font-weight: 500;
      border: 1px solid rgba(255, 85, 0, 0.15);
    }

    .links-cloud a:hover {
      background: var(--primary);
      color: #FFFFFF;
    }

    .site-footer {
      background: #FFFFFF;
      border-top: 1px solid var(--border-color);
      padding: 48px 0 24px;
      color: var(--body-text);
    }

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

    .footer-col h4 {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--dark-text);
      margin-bottom: 16px;
    }

    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .footer-links a {
      font-size: 0.9rem;
      color: var(--body-text);
    }

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

    .footer-bottom {
      border-top: 1px solid #ECECEC;
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 0.88rem;
      color: var(--light-text);
    }

    .friend-links {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      align-items: center;
    }

    .friend-links a {
      color: var(--body-text);
      font-size: 0.88rem;
    }

    .friend-links a:hover {
      color: var(--primary);
    }

    .floating-widget {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 46px;
      height: 46px;
      border-radius: 50%;
      background: #FFFFFF;
      color: var(--primary);
      box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
      border: 1px solid var(--border-color);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      font-size: 1.2rem;
      transition: var(--transition);
    }

    .float-btn:hover {
      background: var(--primary);
      color: #FFFFFF;
      transform: scale(1.08);
    }

    .banner-gallery {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
      margin-top: 24px;
    }

    .banner-gallery img {
      width: 100%;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-color);
    }

    @media (max-width: 992px) {
      .grid-4, .grid-3 {
        grid-template-columns: repeat(2, 1fr);
      }
      .process-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .stats-bar {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-top {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .mobile-menu-btn {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #FFFFFF;
        flex-direction: column;
        padding: 16px;
        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;
      }
      .grid-2, .grid-3, .grid-4, .process-grid {
        grid-template-columns: 1fr;
      }
      .hero-title {
        font-size: 2rem;
      }
      .hero-btns {
        flex-direction: column;
        width: 100%;
      }
      .hero-btns .btn {
        width: 100%;
      }
      .banner-gallery {
        grid-template-columns: 1fr;
      }
      .footer-top {
        grid-template-columns: 1fr;
      }
      .footer-bottom {
        flex-direction: column;
        text-align: center;
      }
    }