:root {
      --primary-color: #059669;
      --primary-hover: #047857;
      --mint-light: #ecfdf5;
      --mint-badge: #d1fae5;
      --accent-fresh: #10b981;
      --accent-subtle: #a7f3d0;
      --text-main: #0f172a;
      --text-muted: #334155;
      --text-sub: #64748b;
      --bg-base: #f8fafc;
      --card-bg: #ffffff;
      --card-border: #e2e8f0;
      --container-max: 1200px;
      --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
      --shadow-md: 0 4px 14px -2px rgba(5, 150, 105, 0.08);
      --shadow-hover: 0 12px 24px -4px rgba(5, 150, 105, 0.14);
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 16px;
      --radius-full: 9999px;
      --transition: all 0.25s ease-in-out;
    }

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

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

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-base);
      color: var(--text-main);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }

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

    ul, ol {
      list-style: none;
    }

    .main-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, 0.95);
      backdrop-filter: blur(8px);
      border-bottom: 1px solid var(--card-border);
      box-shadow: var(--shadow-sm);
    }

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

    .brand-area {
      display: flex;
      align-items: center;
      gap: 12px;
    }

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

    .brand-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--primary-color);
      letter-spacing: -0.5px;
    }

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

    .nav-links li a {
      font-size: 0.92rem;
      font-weight: 500;
      color: var(--text-muted);
      padding: 8px 12px;
      border-radius: var(--radius-sm);
      display: inline-block;
    }

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

    .header-cta-group {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-weight: 600;
      font-size: 0.92rem;
      padding: 10px 20px;
      border-radius: var(--radius-sm);
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition);
      white-space: nowrap;
    }

    .btn-primary {
      background: var(--primary-color);
      color: #ffffff;
      box-shadow: 0 2px 6px rgba(5, 150, 105, 0.25);
    }

    .btn-primary:hover {
      background: var(--primary-hover);
      transform: translateY(-1px);
      box-shadow: 0 4px 10px rgba(5, 150, 105, 0.35);
    }

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

    .btn-outline:hover {
      background: var(--mint-light);
      border-color: var(--primary-color);
    }

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

    .section-wrap {
      padding: 64px 0;
      border-bottom: 1px solid rgba(226, 232, 240, 0.7);
    }

    .section-wrap.alt-bg {
      background: linear-gradient(180deg, rgba(236, 253, 245, 0.45) 0%, rgba(248, 250, 252, 0) 100%);
    }

    .section-title-box {
      text-align: center;
      margin-bottom: 44px;
      max-width: 760px;
      margin-left: auto;
      margin-right: auto;
    }

    .section-tag {
      display: inline-block;
      background: var(--mint-badge);
      color: var(--primary-color);
      font-size: 0.82rem;
      font-weight: 700;
      padding: 4px 12px;
      border-radius: var(--radius-full);
      margin-bottom: 12px;
      letter-spacing: 0.5px;
    }

    .section-title-box h2 {
      font-size: 1.95rem;
      color: var(--text-main);
      font-weight: 700;
      margin-bottom: 12px;
      line-height: 1.3;
    }

    .section-title-box p {
      font-size: 1rem;
      color: var(--text-sub);
    }

    .hero-section {
      padding: 72px 0 60px;
      background: radial-gradient(circle at 50% 0%, #ecfdf5 0%, #f8fafc 70%);
      text-align: center;
      position: relative;
      overflow: hidden;
    }

    .hero-badge-flow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: #ffffff;
      border: 1px solid var(--accent-subtle);
      padding: 6px 16px;
      border-radius: var(--radius-full);
      font-size: 0.85rem;
      color: var(--primary-color);
      font-weight: 600;
      margin-bottom: 24px;
      box-shadow: var(--shadow-sm);
    }

    .hero-title {
      font-size: 2.6rem;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.25;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-subtitle {
      font-size: 1.15rem;
      color: var(--text-muted);
      max-width: 820px;
      margin: 0 auto 32px;
      line-height: 1.7;
    }

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

    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      max-width: 960px;
      margin: 0 auto;
    }

    .stat-card {
      background: #ffffff;
      padding: 20px;
      border-radius: var(--radius-md);
      border: 1px solid var(--card-border);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

    .stat-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-hover);
      border-color: var(--accent-subtle);
    }

    .stat-num {
      font-size: 1.8rem;
      font-weight: 700;
      color: var(--primary-color);
      display: block;
      margin-bottom: 4px;
    }

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

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

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

    .grid-col-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 28px;
    }

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

    .card-base:hover {
      transform: translateY(-4px);
      border-color: var(--accent-subtle);
      box-shadow: var(--shadow-hover);
    }

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

    .card-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }

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

    .card-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
      margin-top: 14px;
    }

    .tag-pill {
      font-size: 0.75rem;
      padding: 2px 8px;
      background: #f1f5f9;
      color: #475569;
      border-radius: 4px;
    }

    .model-tags-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      max-width: 1000px;
      margin: 0 auto;
    }

    .model-tag {
      background: #ffffff;
      border: 1px solid var(--card-border);
      padding: 8px 16px;
      border-radius: var(--radius-full);
      font-size: 0.88rem;
      font-weight: 500;
      color: var(--text-muted);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

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

    .process-grid {
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      gap: 16px;
      position: relative;
    }

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

    .step-index {
      width: 32px;
      height: 32px;
      background: var(--primary-color);
      color: #ffffff;
      font-weight: 700;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 12px;
      font-size: 0.9rem;
    }

    .media-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      border: 1px solid var(--card-border);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

    .media-card:hover {
      box-shadow: var(--shadow-hover);
      border-color: var(--accent-subtle);
    }

    .media-card-img-box {
      width: 100%;
      background: #f1f5f9;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .media-card-img-box img {
      width: 100%;
      height: auto;
      display: block;
      object-fit: cover;
    }

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

    .rating-banner-box {
      background: linear-gradient(135deg, #059669 0%, #10b981 100%);
      color: #ffffff;
      border-radius: var(--radius-lg);
      padding: 32px 40px;
      margin-bottom: 28px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 20px;
    }

    .rating-score-left h3 {
      font-size: 1.6rem;
      margin-bottom: 6px;
    }

    .rating-score-left p {
      font-size: 0.95rem;
      opacity: 0.9;
    }

    .score-badge-area {
      display: flex;
      align-items: baseline;
      gap: 8px;
    }

    .score-badge-big {
      font-size: 3.2rem;
      font-weight: 800;
      line-height: 1;
    }

    .score-stars {
      color: #fef08a;
      font-size: 1.4rem;
    }

    .table-responsive-box {
      overflow-x: auto;
      background: #ffffff;
      border-radius: var(--radius-md);
      border: 1px solid var(--card-border);
      box-shadow: var(--shadow-sm);
    }

    .eval-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 0.92rem;
    }

    .eval-table th, 
    .eval-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--card-border);
    }

    .eval-table th {
      background: #f8fafc;
      font-weight: 700;
      color: var(--text-main);
    }

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

    .eval-table tr:hover td {
      background: #fcfdfd;
    }

    .highlight-col {
      color: var(--primary-color);
      font-weight: 700;
      background: rgba(236, 253, 245, 0.35);
    }

    .match-engine-box {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
      background: #ffffff;
      padding: 32px;
      border-radius: var(--radius-lg);
      border: 1px solid var(--card-border);
    }

    .form-group {
      margin-bottom: 16px;
    }

    .form-group label {
      display: block;
      font-size: 0.9rem;
      font-weight: 600;
      margin-bottom: 6px;
      color: var(--text-main);
    }

    .form-control {
      width: 100%;
      padding: 10px 14px;
      border: 1px solid var(--card-border);
      border-radius: var(--radius-sm);
      font-size: 0.92rem;
      font-family: inherit;
      color: var(--text-main);
      background: #ffffff;
      outline: none;
      transition: var(--transition);
    }

    .form-control:focus {
      border-color: var(--primary-color);
      box-shadow: 0 0 0 3px rgba(5, 150, 105, 0.12);
    }

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

    .faq-accordion {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

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

    .faq-question {
      padding: 18px 24px;
      font-size: 1rem;
      font-weight: 600;
      color: var(--text-main);
      display: flex;
      align-items: center;
      justify-content: space-between;
      cursor: pointer;
      background: none;
      border: none;
      width: 100%;
      text-align: left;
    }

    .faq-question::after {
      content: "+";
      font-size: 1.4rem;
      font-weight: 400;
      color: var(--primary-color);
      transition: transform 0.2s ease;
    }

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

    .faq-answer {
      display: none;
      padding: 0 24px 20px;
      font-size: 0.92rem;
      color: var(--text-sub);
      line-height: 1.7;
    }

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

    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

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

    .review-header {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 14px;
    }

    .avatar-mock {
      width: 44px;
      height: 44px;
      background: var(--mint-badge);
      color: var(--primary-color);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1rem;
    }

    .reviewer-name {
      font-size: 0.96rem;
      font-weight: 700;
      color: var(--text-main);
    }

    .reviewer-role {
      font-size: 0.8rem;
      color: var(--text-sub);
    }

    .review-body {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 14px;
    }

    .review-stars {
      color: #f59e0b;
      font-size: 0.85rem;
    }

    .agent-box {
      background: #ffffff;
      border: 2px solid var(--accent-subtle);
      border-radius: var(--radius-lg);
      padding: 40px;
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 36px;
      align-items: center;
    }

    .agent-perks {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 14px;
      margin-top: 20px;
    }

    .perk-item {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 0.9rem;
      color: var(--text-muted);
    }

    .perk-check {
      color: var(--primary-color);
      font-weight: 700;
    }

    .qr-card {
      background: var(--mint-light);
      border-radius: var(--radius-md);
      padding: 24px;
      text-align: center;
      border: 1px dashed var(--accent-fresh);
    }

    .qr-card img {
      width: 150px;
      height: 150px;
      margin: 0 auto 12px;
      display: block;
      border-radius: var(--radius-sm);
      background: #fff;
      padding: 6px;
      border: 1px solid var(--card-border);
    }

    .qr-card p {
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    .articles-block-box {
      background: #ffffff;
      border: 1px solid var(--card-border);
      border-radius: var(--radius-md);
      padding: 24px;
    }

    .articles-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .article-item-link {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 12px 16px;
      background: #f8fafc;
      border-radius: var(--radius-sm);
      font-size: 0.92rem;
      color: var(--text-main);
      transition: var(--transition);
    }

    .article-item-link:hover {
      background: var(--mint-light);
      color: var(--primary-color);
      padding-left: 20px;
    }

    .site-footer {
      background: #0f172a;
      color: #94a3b8;
      padding: 56px 0 24px;
      border-top: 1px solid #1e293b;
    }

    .footer-top-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 36px;
      margin-bottom: 40px;
    }

    .footer-col h4 {
      color: #ffffff;
      font-size: 1rem;
      margin-bottom: 16px;
      font-weight: 600;
    }

    .footer-col p {
      font-size: 0.88rem;
      line-height: 1.7;
      margin-bottom: 12px;
    }

    .footer-links-list li {
      margin-bottom: 8px;
    }

    .footer-links-list li a {
      color: #94a3b8;
      font-size: 0.88rem;
    }

    .footer-links-list li a:hover {
      color: var(--accent-fresh);
    }

    .friend-links-area {
      border-top: 1px solid #1e293b;
      padding: 20px 0;
      font-size: 0.82rem;
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      align-items: center;
    }

    .friend-links-area a {
      color: #64748b;
    }

    .friend-links-area a:hover {
      color: var(--accent-fresh);
    }

    .footer-bottom {
      border-top: 1px solid #1e293b;
      padding-top: 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-size: 0.82rem;
      color: #64748b;
    }

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

    .float-btn {
      width: 48px;
      height: 48px;
      background: #ffffff;
      border: 1px solid var(--card-border);
      box-shadow: 0 4px 12px rgba(0,0,0,0.12);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary-color);
      cursor: pointer;
      font-size: 1.1rem;
      transition: var(--transition);
      position: relative;
    }

    .float-btn:hover {
      background: var(--primary-color);
      color: #ffffff;
    }

    .float-qr-hover {
      position: absolute;
      right: 58px;
      bottom: 0;
      background: #ffffff;
      padding: 12px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-hover);
      border: 1px solid var(--card-border);
      display: none;
      width: 150px;
      text-align: center;
    }

    .float-btn:hover .float-qr-hover {
      display: block;
    }

    .float-qr-hover img {
      width: 100%;
      height: auto;
      display: block;
      margin-bottom: 6px;
    }

    .float-qr-hover span {
      font-size: 0.75rem;
      color: var(--text-main);
    }

    @media (max-width: 1024px) {
      .grid-col-4 {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-col-3 {
        grid-template-columns: repeat(2, 1fr);
      }
      .process-grid {
        grid-template-columns: repeat(3, 1fr);
      }
      .footer-top-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .agent-box {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .mobile-menu-toggle {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        padding: 16px;
        box-shadow: 0 8px 16px rgba(0,0,0,0.1);
        border-bottom: 1px solid var(--card-border);
      }
      .nav-links.active {
        display: flex;
      }
      .nav-links li {
        width: 100%;
      }
      .nav-links li a {
        display: block;
        padding: 10px 14px;
      }
      .header-cta-group .btn-outline {
        display: none;
      }
      .hero-title {
        font-size: 1.85rem;
      }
      .hero-stats-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-col-3, .grid-col-2, .reviews-grid {
        grid-template-columns: 1fr;
      }
      .process-grid {
        grid-template-columns: 1fr;
      }
      .match-engine-box {
        grid-template-columns: 1fr;
      }
      .footer-top-grid {
        grid-template-columns: 1fr;
      }
      .footer-bottom {
        flex-direction: column;
        gap: 12px;
        text-align: center;
      }
    }