:root {
      --primary: #ff3366;
      --primary-hover: #e02456;
      --secondary: #6366f1;
      --accent-cyan: #00d2ff;
      --accent-gold: #ffaa00;
      --text-main: #1e293b;
      --text-muted: #64748b;
      --text-light: #94a3b8;
      --bg-page: #f8fafc;
      --bg-card: #ffffff;
      --border-color: #e2e8f0;
      --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
      --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
      --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
      --radius: 12px;
      --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      color: var(--text-main);
      background-color: var(--bg-page);
    }
    body {
      background: linear-gradient(180deg, #f1f5f9 0%, #f8fafc 300px, #ffffff 100%);
      line-height: 1.6;
      overflow-x: hidden;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition);
    }
    .site-container {
      width: 100%;
      max-width: 1240px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }
    .section-wrap {
      padding: 70px 0;
      position: relative;
    }
    .section-title-wrap {
      text-align: center;
      margin-bottom: 48px;
    }
    .section-badge {
      display: inline-block;
      padding: 6px 16px;
      background: rgba(255, 51, 102, 0.08);
      color: var(--primary);
      border-radius: 99px;
      font-size: 13px;
      font-weight: 700;
      margin-bottom: 12px;
      border: 1px solid rgba(255, 51, 102, 0.2);
    }
    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: var(--text-main);
      letter-spacing: -0.5px;
      margin-bottom: 12px;
    }
    .section-desc {
      font-size: 16px;
      color: var(--text-muted);
      max-width: 680px;
      margin: 0 auto;
    }
    .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);
      box-shadow: var(--shadow-sm);
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-wrap {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .ai-page-logo {
      height: 42px;
      width: auto;
      display: block;
    }
    .site-nav {
      display: flex;
      align-items: center;
    }
    .nav-links {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 0;
    }
    .nav-links li a {
      padding: 10px 14px;
      font-size: 14px;
      font-weight: 600;
      color: var(--text-main);
      border-radius: 6px;
    }
    .nav-links li a:hover {
      color: var(--primary);
      background: rgba(255, 51, 102, 0.05);
    }
    .header-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn-primary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      background: linear-gradient(135deg, var(--primary) 0%, #ff527b 100%);
      color: #ffffff !important;
      font-size: 14px;
      font-weight: 700;
      border-radius: 8px;
      box-shadow: 0 4px 12px rgba(255, 51, 102, 0.3);
      border: none;
      cursor: pointer;
      transition: var(--transition);
    }
    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 18px rgba(255, 51, 102, 0.4);
    }
    .btn-outline {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 20px;
      background: #ffffff;
      color: var(--text-main);
      font-size: 14px;
      font-weight: 600;
      border-radius: 8px;
      border: 1px solid var(--border-color);
      cursor: pointer;
      transition: var(--transition);
    }
    .btn-outline:hover {
      border-color: var(--secondary);
      color: var(--secondary);
    }
    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 8px;
    }
    .mobile-menu-btn span {
      display: block;
      width: 22px;
      height: 2px;
      background: var(--text-main);
      margin: 5px 0;
      transition: var(--transition);
    }
    .hero-section {
      padding: 80px 0 60px;
      background: radial-gradient(circle at 10% 20%, rgba(255, 51, 102, 0.08) 0%, rgba(99, 102, 241, 0.05) 50%, rgba(248, 250, 252, 0) 100%);
      text-align: center;
      position: relative;
    }
    .hero-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 18px;
      background: #ffffff;
      border: 1px solid #fed7e2;
      box-shadow: var(--shadow-sm);
      border-radius: 30px;
      font-size: 13px;
      color: var(--primary);
      font-weight: 700;
      margin-bottom: 24px;
    }
    .hero-h1 {
      font-size: 44px;
      font-weight: 900;
      line-height: 1.25;
      color: #0f172a;
      max-width: 900px;
      margin: 0 auto 20px;
      letter-spacing: -1px;
    }
    .hero-h1 span {
      background: linear-gradient(135deg, var(--primary) 0%, #7928ca 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-sub {
      font-size: 18px;
      color: var(--text-muted);
      max-width: 760px;
      margin: 0 auto 36px;
      line-height: 1.7;
    }
    .hero-cta-box {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 48px;
    }
    .btn-hero-main {
      padding: 16px 36px;
      font-size: 16px;
      font-weight: 800;
      border-radius: 10px;
      background: linear-gradient(135deg, var(--primary) 0%, #ff0055 100%);
      color: #ffffff;
      box-shadow: 0 10px 25px rgba(255, 51, 102, 0.35);
      border: none;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .btn-hero-main:hover {
      transform: translateY(-3px);
      box-shadow: 0 14px 30px rgba(255, 51, 102, 0.45);
    }
    .hero-metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 20px;
    }
    .metric-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px 20px;
      box-shadow: var(--shadow-sm);
      text-align: left;
      transition: var(--transition);
    }
    .metric-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: rgba(255, 51, 102, 0.3);
    }
    .metric-num {
      font-size: 32px;
      font-weight: 900;
      color: var(--primary);
      line-height: 1;
      margin-bottom: 6px;
    }
    .metric-label {
      font-size: 14px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 4px;
    }
    .metric-tip {
      font-size: 12px;
      color: var(--text-light);
    }
    .models-marquee-section {
      background: #ffffff;
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
      padding: 24px 0;
    }
    .models-label {
      text-align: center;
      font-size: 13px;
      font-weight: 700;
      color: var(--text-light);
      margin-bottom: 16px;
      letter-spacing: 0.5px;
    }
    .tags-flow {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
      max-width: 1100px;
      margin: 0 auto;
    }
    .model-chip {
      background: #f1f5f9;
      color: #334155;
      padding: 6px 14px;
      border-radius: 8px;
      font-size: 12px;
      font-weight: 700;
      border: 1px solid #e2e8f0;
      transition: var(--transition);
    }
    .model-chip:hover {
      background: #ffe4e6;
      color: var(--primary);
      border-color: #fecdd3;
    }
    .service-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;
    }
    .service-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-lg);
      border-color: rgba(99, 102, 241, 0.3);
    }
    .service-icon-box {
      width: 48px;
      height: 48px;
      border-radius: 10px;
      background: rgba(255, 51, 102, 0.1);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      color: var(--primary);
      margin-bottom: 18px;
    }
    .service-card-title {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-main);
    }
    .service-card-desc {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
      flex-grow: 1;
    }
    .service-card-features {
      list-style: none;
      padding-top: 12px;
      border-top: 1px solid #f1f5f9;
      margin-top: auto;
    }
    .service-card-features li {
      font-size: 12px;
      color: var(--text-muted);
      display: flex;
      align-items: center;
      gap: 6px;
      margin-bottom: 6px;
    }
    .service-card-features li:last-child {
      margin-bottom: 0;
    }
    .process-timeline {
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      gap: 16px;
      position: relative;
    }
    .process-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px 18px;
      text-align: center;
      box-shadow: var(--shadow-sm);
      position: relative;
    }
    .process-step-badge {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 15px;
      margin: 0 auto 14px;
    }
    .process-step-title {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 8px;
    }
    .process-step-desc {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.5;
    }
    .evaluation-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      box-shadow: var(--shadow-md);
      overflow: hidden;
    }
    .eval-header {
      background: linear-gradient(90deg, #1e293b 0%, #0f172a 100%);
      color: #ffffff;
      padding: 32px 40px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 20px;
    }
    .eval-score-num {
      font-size: 56px;
      font-weight: 900;
      color: #ffaa00;
      line-height: 1;
    }
    .eval-score-stars {
      color: #ffaa00;
      font-size: 24px;
      margin-top: 6px;
    }
    .table-container {
      width: 100%;
      overflow-x: auto;
    }
    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
    }
    .compare-table th, .compare-table td {
      padding: 16px 24px;
      border-bottom: 1px solid var(--border-color);
      font-size: 14px;
    }
    .compare-table th {
      background: #f8fafc;
      color: var(--text-main);
      font-weight: 700;
    }
    .compare-table tr:hover {
      background: #fdf2f8;
    }
    .highlight-cell {
      background: rgba(255, 51, 102, 0.04);
      font-weight: 700;
      color: var(--primary);
    }
    .media-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }
    .media-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }
    .media-card:hover {
      box-shadow: var(--shadow-md);
    }
    .media-img-wrap {
      width: 100%;
      aspect-ratio: 16 / 9;
      background: #f1f5f9;
      overflow: hidden;
    }
    .media-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
    }
    .media-content {
      padding: 20px;
    }
    .media-title {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 8px;
    }
    .media-desc {
      font-size: 14px;
      color: var(--text-muted);
    }
    .form-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 40px;
      box-shadow: var(--shadow-lg);
      max-width: 800px;
      margin: 0 auto;
    }
    .form-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 20px;
      margin-bottom: 20px;
    }
    .form-group-full {
      grid-column: span 2;
    }
    .form-label {
      display: block;
      font-size: 14px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 6px;
    }
    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      font-size: 14px;
      color: var(--text-main);
      background: #f8fafc;
      transition: var(--transition);
    }
    .form-control:focus {
      outline: none;
      border-color: var(--primary);
      background: #ffffff;
      box-shadow: 0 0 0 3px rgba(255, 51, 102, 0.15);
    }
    textarea.form-control {
      resize: vertical;
      min-height: 120px;
    }
    .faq-list {
      display: flex;
      flex-direction: column;
      gap: 14px;
      max-width: 900px;
      margin: 0 auto;
    }
    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 10px;
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .faq-question {
      padding: 18px 24px;
      font-size: 16px;
      font-weight: 700;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      user-select: none;
    }
    .faq-question:hover {
      background: #faf5ff;
    }
    .faq-icon {
      font-size: 18px;
      color: var(--primary);
      transition: var(--transition);
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease-out;
      background: #fafbfc;
      border-top: 1px solid transparent;
    }
    .faq-item.active .faq-answer {
      max-height: 300px;
      border-top-color: var(--border-color);
    }
    .faq-answer-inner {
      padding: 18px 24px;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
    }
    .comments-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .comment-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;
    }
    .comment-card:hover {
      border-color: rgba(255, 51, 102, 0.3);
      box-shadow: var(--shadow-md);
    }
    .comment-stars {
      color: #ffaa00;
      font-size: 14px;
      margin-bottom: 12px;
    }
    .comment-text {
      font-size: 14px;
      color: #475569;
      line-height: 1.6;
      margin-bottom: 16px;
    }
    .comment-author-box {
      display: flex;
      align-items: center;
      gap: 12px;
      padding-top: 12px;
      border-top: 1px solid #f1f5f9;
    }
    .author-avatar-text {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--secondary) 0%, #38bdf8 100%);
      color: #ffffff;
      font-weight: 700;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 14px;
    }
    .author-name {
      font-size: 14px;
      font-weight: 700;
      color: var(--text-main);
    }
    .author-role {
      font-size: 12px;
      color: var(--text-light);
    }
    .articles-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }
    .article-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 20px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }
    .article-item:hover {
      border-color: var(--primary);
      transform: translateY(-3px);
      box-shadow: var(--shadow-md);
    }
    .article-date {
      font-size: 12px;
      color: var(--text-light);
      margin-bottom: 8px;
    }
    .article-title {
      font-size: 15px;
      font-weight: 700;
      line-height: 1.4;
      margin-bottom: 8px;
      color: var(--text-main);
    }
    .article-link {
      font-size: 13px;
      color: var(--primary);
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }
    .site-footer {
      background: #0f172a;
      color: #94a3b8;
      padding: 60px 0 24px;
      border-top: 1px solid #1e293b;
    }
    .footer-main-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 40px;
      margin-bottom: 40px;
    }
    .footer-col-title {
      font-size: 16px;
      font-weight: 700;
      color: #f8fafc;
      margin-bottom: 20px;
    }
    .footer-links-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-links-list a {
      color: #94a3b8;
      font-size: 14px;
    }
    .footer-links-list a:hover {
      color: #ffffff;
      padding-left: 4px;
    }
    .footer-qr-card {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .footer-qr-img {
      width: 110px;
      height: 110px;
      background: #ffffff;
      border-radius: 8px;
      padding: 4px;
    }
    .footer-qr-img img {
      width: 100%;
      height: 100%;
      display: block;
      object-fit: cover;
    }
    .footer-qr-text {
      font-size: 12px;
      color: #64748b;
    }
    .friend-links-box {
      border-top: 1px solid #1e293b;
      padding-top: 24px;
      margin-bottom: 24px;
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      align-items: center;
    }
    .friend-links-box span {
      font-size: 13px;
      color: #64748b;
      font-weight: 700;
    }
    .friend-links-box a {
      font-size: 13px;
      color: #94a3b8;
    }
    .friend-links-box a:hover {
      color: #ffffff;
    }
    .footer-bottom-bar {
      border-top: 1px solid #1e293b;
      padding-top: 24px;
      text-align: center;
      font-size: 13px;
      color: #64748b;
    }
    .floating-kefu {
      position: fixed;
      right: 20px;
      bottom: 80px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .floating-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #ffffff;
      box-shadow: var(--shadow-lg);
      display: flex;
      align-items: center;
      justify-content: center;
      border: 1px solid var(--border-color);
      cursor: pointer;
      position: relative;
      transition: var(--transition);
    }
    .floating-btn:hover {
      transform: scale(1.08);
    }
    .kefu-popup {
      position: absolute;
      right: 60px;
      bottom: 0;
      width: 180px;
      background: #ffffff;
      border-radius: 10px;
      box-shadow: var(--shadow-lg);
      padding: 14px;
      text-align: center;
      display: none;
      border: 1px solid var(--border-color);
    }
    .floating-btn:hover .kefu-popup {
      display: block;
    }
    .kefu-popup img {
      width: 100%;
      height: auto;
      display: block;
      margin-bottom: 8px;
    }
    .kefu-popup p {
      font-size: 12px;
      color: var(--text-main);
      font-weight: 700;
    }
    @media (max-width: 992px) {
      .hero-h1 {
        font-size: 32px;
      }
      .hero-metrics-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .service-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .process-timeline {
        grid-template-columns: repeat(2, 1fr);
      }
      .media-grid {
        grid-template-columns: 1fr;
      }
      .comments-grid {
        grid-template-columns: 1fr;
      }
      .articles-grid {
        grid-template-columns: 1fr;
      }
      .footer-main-grid {
        grid-template-columns: 1fr 1fr;
      }
    }
    @media (max-width: 768px) {
      .site-nav {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #ffffff;
        border-bottom: 1px solid var(--border-color);
        padding: 20px;
        box-shadow: var(--shadow-md);
      }
      .site-nav.active {
        display: block;
      }
      .nav-links {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
      }
      .mobile-menu-btn {
        display: block;
      }
      .form-grid {
        grid-template-columns: 1fr;
      }
      .form-group-full {
        grid-column: span 1;
      }
      .service-grid {
        grid-template-columns: 1fr;
      }
      .footer-main-grid {
        grid-template-columns: 1fr;
      }
    }