:root {
      --c-bg: #f8fafc;
      --c-surface: #ffffff;
      --c-text-main: #0f172a;
      --c-text-sub: #475569;
      --c-text-light: #64748b;
      --c-border: #e2e8f0;
      --c-primary: #4338ca;
      --c-primary-light: #e0e7ff;
      --c-accent-pink: #ec4899;
      --c-accent-cyan: #06b6d4;
      --c-accent-amber: #f59e0b;
      --c-accent-emerald: #10b981;
      --grad-main: linear-gradient(135deg, #4f46e5 0%, #7c3aed 50%, #db2777 100%);
      --grad-glow: linear-gradient(135deg, rgba(99, 102, 241, 0.08) 0%, rgba(236, 72, 153, 0.08) 50%, rgba(6, 182, 212, 0.08) 100%);
      --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
      --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
      --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
      --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
      --radius: 14px;
      --max-w: 1200px;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--c-bg);
      background-image: 
        radial-gradient(at 0% 0%, rgba(99, 102, 241, 0.08) 0px, transparent 50%),
        radial-gradient(at 100% 20%, rgba(236, 72, 153, 0.07) 0px, transparent 40%),
        radial-gradient(at 50% 70%, rgba(6, 182, 212, 0.06) 0px, transparent 50%);
      background-attachment: fixed;
      color: var(--c-text-main);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }
    a {
      color: inherit;
      text-decoration: none;
    }
    .site-container {
      width: 100%;
      max-width: var(--max-w);
      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, 0.92);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--c-border);
      transition: all 0.3s ease;
    }
    .nav-wrapper {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-box {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .brand-logo-wrap {
      max-width: 140px;
      display: flex;
      align-items: center;
    }
    .brand-logo-wrap img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
    }
    .nav-links li a {
      font-size: 14px;
      font-weight: 500;
      color: var(--c-text-sub);
      padding: 8px 12px;
      border-radius: 6px;
      transition: color 0.2s ease, background-color 0.2s ease;
      white-space: nowrap;
    }
    .nav-links li a:hover {
      color: var(--c-primary);
      background-color: var(--c-primary-light);
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 20px;
      font-size: 14px;
      font-weight: 600;
      border-radius: 8px;
      cursor: pointer;
      transition: all 0.25s ease;
      border: 1px solid transparent;
      text-align: center;
      line-height: 1.2;
    }
    .btn-gradient {
      background: var(--grad-main);
      color: #ffffff;
      box-shadow: 0 4px 14px rgba(79, 70, 229, 0.3);
    }
    .btn-gradient:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(79, 70, 229, 0.45);
      color: #ffffff;
    }
    .btn-outline {
      background: #ffffff;
      color: var(--c-text-main);
      border-color: var(--c-border);
    }
    .btn-outline:hover {
      border-color: var(--c-primary);
      color: var(--c-primary);
      background: #f1f5f9;
    }
    .mobile-menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      color: var(--c-text-main);
      cursor: pointer;
      padding: 4px;
    }
    .sec-wrap {
      padding: 80px 0;
    }
    .sec-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 50px auto;
    }
    .sec-tag {
      display: inline-block;
      padding: 4px 12px;
      font-size: 12px;
      font-weight: 700;
      letter-spacing: 1px;
      text-transform: uppercase;
      color: var(--c-primary);
      background: var(--c-primary-light);
      border-radius: 9999px;
      margin-bottom: 12px;
    }
    .sec-title {
      font-size: 32px;
      font-weight: 800;
      color: var(--c-text-main);
      margin-bottom: 14px;
      line-height: 1.3;
    }
    .sec-desc {
      font-size: 16px;
      color: var(--c-text-sub);
    }
    .hero-section {
      padding: 90px 0 60px 0;
      text-align: center;
      position: relative;
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      background: #ffffff;
      border: 1px solid var(--c-border);
      border-radius: 30px;
      font-size: 13px;
      font-weight: 600;
      color: var(--c-primary);
      box-shadow: var(--shadow-sm);
      margin-bottom: 24px;
    }
    .hero-title {
      font-size: 46px;
      font-weight: 900;
      line-height: 1.25;
      letter-spacing: -0.5px;
      margin-bottom: 20px;
      color: var(--c-text-main);
    }
    .hero-title span {
      background: var(--grad-main);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-subtitle {
      font-size: 18px;
      color: var(--c-text-sub);
      max-width: 820px;
      margin: 0 auto 36px auto;
      line-height: 1.7;
    }
    .hero-cta-group {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 50px;
    }
    .hero-highlight-btn {
      font-size: 16px;
      padding: 14px 32px;
      font-weight: 700;
      border-radius: 10px;
    }
    .hero-metrics {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 20px;
    }
    .metric-card {
      background: #ffffff;
      padding: 24px;
      border-radius: var(--radius);
      border: 1px solid var(--c-border);
      box-shadow: var(--shadow-sm);
      text-align: center;
      transition: transform 0.25s ease, box-shadow 0.25s ease;
    }
    .metric-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: #cbd5e1;
    }
    .metric-val {
      font-size: 32px;
      font-weight: 800;
      color: var(--c-primary);
      margin-bottom: 4px;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 2px;
    }
    .metric-label {
      font-size: 13px;
      color: var(--c-text-light);
      font-weight: 500;
    }
    .model-tags-box {
      background: #ffffff;
      border-radius: var(--radius);
      padding: 30px;
      border: 1px solid var(--c-border);
      box-shadow: var(--shadow-sm);
      margin-top: 40px;
      text-align: center;
    }
    .model-tags-title {
      font-size: 14px;
      font-weight: 700;
      color: var(--c-text-light);
      text-transform: uppercase;
      letter-spacing: 1px;
      margin-bottom: 16px;
    }
    .model-tags-flex {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      justify-content: center;
    }
    .model-tag-item {
      padding: 6px 14px;
      font-size: 12px;
      font-weight: 600;
      background: #f1f5f9;
      color: var(--c-text-sub);
      border-radius: 6px;
      border: 1px solid #e2e8f0;
      transition: all 0.2s ease;
    }
    .model-tag-item:hover {
      background: var(--c-primary-light);
      color: var(--c-primary);
      border-color: #c7d2fe;
    }
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }
    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .feature-card {
      background: #ffffff;
      padding: 30px;
      border-radius: var(--radius);
      border: 1px solid var(--c-border);
      box-shadow: var(--shadow-sm);
      transition: all 0.25s ease;
      position: relative;
      display: flex;
      flex-direction: column;
    }
    .feature-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
      border-color: #c7d2fe;
    }
    .card-badge {
      align-self: flex-start;
      font-size: 11px;
      font-weight: 700;
      padding: 3px 8px;
      border-radius: 4px;
      background: var(--c-primary-light);
      color: var(--c-primary);
      margin-bottom: 16px;
    }
    .feature-card h3 {
      font-size: 20px;
      font-weight: 700;
      color: var(--c-text-main);
      margin-bottom: 12px;
      line-height: 1.4;
    }
    .feature-card p {
      font-size: 14px;
      color: var(--c-text-sub);
      line-height: 1.7;
      flex-grow: 1;
    }
    .media-card {
      background: #ffffff;
      border-radius: var(--radius);
      border: 1px solid var(--c-border);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      transition: all 0.25s ease;
    }
    .media-card:hover {
      box-shadow: var(--shadow-lg);
      transform: translateY(-4px);
    }
    .media-card-img-wrap {
      width: 100%;
      aspect-ratio: 16 / 9;
      background: #e2e8f0;
      overflow: hidden;
    }
    .media-card-img-wrap.square {
      aspect-ratio: 1 / 1;
    }
    .media-card-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
      transition: transform 0.4s ease;
    }
    .media-card:hover .media-card-img-wrap img {
      transform: scale(1.03);
    }
    .media-card-body {
      padding: 24px;
      display: flex;
      flex-direction: column;
      flex-grow: 1;
    }
    .media-card-body h3 {
      font-size: 18px;
      font-weight: 700;
      color: var(--c-text-main);
      margin-bottom: 10px;
    }
    .media-card-body p {
      font-size: 14px;
      color: var(--c-text-sub);
      line-height: 1.6;
    }
    .flow-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }
    .flow-step-card {
      background: #ffffff;
      padding: 24px;
      border-radius: var(--radius);
      border: 1px solid var(--c-border);
      position: relative;
      text-align: center;
    }
    .flow-num {
      width: 44px;
      height: 44px;
      line-height: 44px;
      border-radius: 50%;
      background: var(--grad-main);
      color: #ffffff;
      font-size: 18px;
      font-weight: 800;
      margin: 0 auto 16px auto;
    }
    .flow-step-card h4 {
      font-size: 17px;
      font-weight: 700;
      margin-bottom: 8px;
    }
    .flow-step-card p {
      font-size: 13px;
      color: var(--c-text-sub);
      line-height: 1.6;
    }
    .eval-box {
      background: #ffffff;
      border-radius: var(--radius);
      border: 1px solid var(--c-border);
      box-shadow: var(--shadow-md);
      overflow: hidden;
      margin-bottom: 40px;
    }
    .eval-header-bar {
      background: linear-gradient(90deg, #312e81, #4338ca);
      color: #ffffff;
      padding: 30px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 20px;
    }
    .eval-score-wrap {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .eval-score-num {
      font-size: 54px;
      font-weight: 900;
      line-height: 1;
      color: #fbbf24;
    }
    .eval-score-meta {
      display: flex;
      flex-direction: column;
    }
    .eval-stars {
      color: #fbbf24;
      font-size: 20px;
      letter-spacing: 2px;
    }
    .eval-sub {
      font-size: 13px;
      opacity: 0.85;
    }
    .table-container {
      width: 100%;
      overflow-x: auto;
    }
    .custom-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 14px;
    }
    .custom-table th, .custom-table td {
      padding: 18px 24px;
      border-bottom: 1px solid var(--c-border);
    }
    .custom-table th {
      background: #f8fafc;
      font-weight: 700;
      color: var(--c-text-main);
    }
    .custom-table tr:hover td {
      background: #f1f5f9;
    }
    .tag-badge-green {
      display: inline-block;
      padding: 2px 8px;
      border-radius: 4px;
      background: #dcfce7;
      color: #15803d;
      font-size: 12px;
      font-weight: 700;
    }
    .tag-badge-gray {
      display: inline-block;
      padding: 2px 8px;
      border-radius: 4px;
      background: #f1f5f9;
      color: #64748b;
      font-size: 12px;
    }
    .faq-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
      max-width: 900px;
      margin: 0 auto;
    }
    .faq-item {
      background: #ffffff;
      border-radius: 10px;
      border: 1px solid var(--c-border);
      overflow: hidden;
      transition: all 0.2s ease;
    }
    .faq-item.active {
      border-color: var(--c-primary);
      box-shadow: var(--shadow-sm);
    }
    .faq-question {
      width: 100%;
      text-align: left;
      background: none;
      border: none;
      padding: 18px 24px;
      font-size: 16px;
      font-weight: 700;
      color: var(--c-text-main);
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
    }
    .faq-icon {
      font-size: 18px;
      color: var(--c-text-light);
      transition: transform 0.2s ease;
    }
    .faq-item.active .faq-icon {
      transform: rotate(180deg);
      color: var(--c-primary);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      background: #f8fafc;
    }
    .faq-answer-inner {
      padding: 18px 24px;
      font-size: 14px;
      color: var(--c-text-sub);
      line-height: 1.7;
      border-top: 1px solid #f1f5f9;
    }
    .review-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }
    .review-card {
      background: #ffffff;
      padding: 24px;
      border-radius: var(--radius);
      border: 1px solid var(--c-border);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      box-shadow: var(--shadow-sm);
    }
    .review-stars {
      color: #f59e0b;
      margin-bottom: 12px;
      font-size: 14px;
    }
    .review-text {
      font-size: 14px;
      color: var(--c-text-sub);
      line-height: 1.7;
      margin-bottom: 16px;
      flex-grow: 1;
    }
    .review-user-info {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #f1f5f9;
      padding-top: 12px;
    }
    .review-avatar-char {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: var(--c-primary-light);
      color: var(--c-primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 14px;
    }
    .review-user-meta h5 {
      font-size: 14px;
      font-weight: 700;
      color: var(--c-text-main);
    }
    .review-user-meta span {
      font-size: 12px;
      color: var(--c-text-light);
    }
    .contact-container {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      background: #ffffff;
      border-radius: var(--radius);
      border: 1px solid var(--c-border);
      padding: 40px;
      box-shadow: var(--shadow-sm);
    }
    .form-group {
      margin-bottom: 18px;
    }
    .form-label {
      display: block;
      font-size: 14px;
      font-weight: 600;
      color: var(--c-text-main);
      margin-bottom: 6px;
    }
    .form-input, .form-select, .form-textarea {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid var(--c-border);
      border-radius: 8px;
      font-size: 14px;
      color: var(--c-text-main);
      background: #f8fafc;
      transition: border-color 0.2s ease, background 0.2s ease;
    }
    .form-input:focus, .form-select:focus, .form-textarea:focus {
      outline: none;
      border-color: var(--c-primary);
      background: #ffffff;
    }
    .qr-wrap {
      max-width: 180px;
      margin: 16px 0;
      border: 1px solid var(--c-border);
      border-radius: 10px;
      overflow: hidden;
      padding: 8px;
      background: #ffffff;
    }
    .qr-wrap img {
      width: 100%;
      height: auto;
      display: block;
    }
    .contact-info-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
      font-size: 14px;
      color: var(--c-text-sub);
    }
    .contact-info-list strong {
      color: var(--c-text-main);
    }
    .article-links-box {
      background: #ffffff;
      border-radius: var(--radius);
      padding: 24px;
      border: 1px solid var(--c-border);
      margin-top: 20px;
    }
    .article-links-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      gap: 12px;
      margin-top: 12px;
    }
    .article-link-item {
      display: flex;
      align-items: center;
      padding: 10px 14px;
      background: #f8fafc;
      border-radius: 8px;
      font-size: 13px;
      color: var(--c-text-sub);
      border: 1px solid #e2e8f0;
      transition: all 0.2s ease;
    }
    .article-link-item:hover {
      background: var(--c-primary-light);
      color: var(--c-primary);
      border-color: #c7d2fe;
    }
    .site-footer {
      background: #0f172a;
      color: #94a3b8;
      padding: 60px 0 30px 0;
      font-size: 14px;
      border-top: 1px solid #1e293b;
    }
    .footer-top {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 40px;
    }
    .footer-col h4 {
      color: #f8fafc;
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 18px;
    }
    .footer-col ul {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-col ul a {
      color: #94a3b8;
      transition: color 0.2s ease;
    }
    .footer-col ul a:hover {
      color: #ffffff;
    }
    .footer-brand p {
      line-height: 1.7;
      margin-bottom: 16px;
      max-width: 320px;
    }
    .footer-friends-bar {
      border-top: 1px solid #1e293b;
      padding: 24px 0;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 16px;
      font-size: 13px;
    }
    .footer-friends-bar span {
      color: #cbd5e1;
      font-weight: 600;
    }
    .footer-friends-bar a {
      color: #94a3b8;
      transition: color 0.2s ease;
    }
    .footer-friends-bar a:hover {
      color: #38bdf8;
    }
    .footer-bottom-copy {
      border-top: 1px solid #1e293b;
      padding-top: 24px;
      text-align: center;
      font-size: 13px;
      color: #64748b;
    }
    .floating-tools {
      position: fixed;
      right: 24px;
      bottom: 30px;
      display: flex;
      flex-direction: column;
      gap: 10px;
      z-index: 999;
    }
    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #ffffff;
      border: 1px solid var(--c-border);
      box-shadow: var(--shadow-lg);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      font-size: 18px;
      color: var(--c-text-main);
      transition: all 0.2s ease;
    }
    .float-btn:hover {
      background: var(--c-primary);
      color: #ffffff;
      transform: translateY(-2px);
    }
    @media (max-width: 992px) {
      .hero-title { font-size: 34px; }
      .grid-3, .review-grid, .flow-steps, .hero-metrics, .grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }
      .contact-container {
        grid-template-columns: 1fr;
      }
      .footer-top {
        grid-template-columns: 1fr 1fr;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        padding: 20px;
        border-bottom: 1px solid var(--c-border);
        box-shadow: var(--shadow-md);
      }
      .nav-links.show {
        display: flex;
      }
      .mobile-menu-toggle {
        display: block;
      }
    }
    @media (max-width: 640px) {
      .hero-title { font-size: 28px; }
      .grid-3, .grid-2, .review-grid, .flow-steps, .hero-metrics, .grid-4, .footer-top {
        grid-template-columns: 1fr;
      }
      .sec-wrap { padding: 50px 0; }
      .eval-header-bar {
        flex-direction: column;
        align-items: flex-start;
      }
    }