* {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    :root {
      --primary: #0b3b5c;
      --primary-light: #1a6d8a;
      --accent: #00b4c6;
      --accent-soft: #d4f0f5;
      --teal-glow: rgba(0, 180, 198, 0.12);
      --bg-body: #f4faff;
      --bg-section: #ffffff;
      --bg-soft: #eef7fb;
      --text-dark: #12232e;
      --text-body: #2c3e4f;
      --text-muted: #4f6575;
      --border-light: #d5e8f0;
      --shadow-sm: 0 4px 16px rgba(0, 60, 90, 0.05);
      --shadow-md: 0 12px 36px rgba(0, 60, 90, 0.09);
      --radius-sm: 14px;
      --radius-md: 22px;
      --radius-lg: 32px;
      --transition: 0.28s cubic-bezier(0.2, 0.9, 0.4, 1);
      --font: system-ui, -apple-system, 'Segoe UI', Roboto, 'PingFang SC', 'Microsoft YaHei', sans-serif;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      font-family: var(--font);
      background: var(--bg-body);
      color: var(--text-body);
      line-height: 1.6;
      font-size: 16px;
      background-image: radial-gradient(circle at 10% 20%, rgba(0, 180, 198, 0.04) 0%, transparent 30%),
                        radial-gradient(circle at 90% 80%, rgba(0, 110, 150, 0.04) 0%, transparent 40%);
    }
    .container {
      width: 100%;
      max-width: 1240px;
      margin: 0 auto;
      padding-left: 24px;
      padding-right: 24px;
    }
    h1, h2, h3, h4, h5 {
      color: var(--text-dark);
      line-height: 1.25;
      font-weight: 700;
      letter-spacing: -0.01em;
    }
    h1 {
      font-size: clamp(1.9rem, 5vw, 3.2rem);
      font-weight: 800;
    }
    h2 {
      font-size: clamp(1.6rem, 3.5vw, 2.4rem);
      margin-bottom: 12px;
    }
    h3 {
      font-size: clamp(1.15rem, 2vw, 1.35rem);
    }
    p {
      color: var(--text-body);
      font-size: 1rem;
    }
    a {
      text-decoration: none;
      color: var(--primary-light);
      transition: color var(--transition);
    }
    a:hover {
      color: var(--accent);
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    ul, ol {
      list-style: none;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 12px 28px;
      border-radius: 60px;
      font-weight: 600;
      font-size: 0.95rem;
      letter-spacing: 0.01em;
      transition: all var(--transition);
      border: 1px solid transparent;
      cursor: pointer;
      background: #fff;
      color: var(--text-dark);
      box-shadow: var(--shadow-sm);
      white-space: nowrap;
    }
    .btn-primary {
      background: linear-gradient(120deg, #0b3b5c, #1a6d8a 80%);
      color: #fff;
      box-shadow: 0 10px 24px -8px rgba(0, 100, 130, 0.4);
    }
    .btn-primary:hover {
      background: linear-gradient(120deg, #0e4a6e, #1f7d9c);
      transform: translateY(-2px);
      box-shadow: 0 16px 30px -10px rgba(0, 100, 130, 0.5);
      color: #fff;
    }
    .btn-outline {
      background: transparent;
      border: 1.5px solid var(--border-light);
      color: var(--primary);
      box-shadow: none;
    }
    .btn-outline:hover {
      border-color: var(--accent);
      background: rgba(0, 180, 198, 0.06);
      transform: translateY(-2px);
    }
    .btn-accent {
      background: var(--accent);
      color: #fff;
      box-shadow: 0 8px 22px -6px rgba(0, 180, 198, 0.5);
    }
    .btn-accent:hover {
      background: #009eaf;
      transform: translateY(-2px);
      color: #fff;
    }
    .section {
      padding: 72px 0;
      position: relative;
    }
    .section-light {
      background: var(--bg-section);
    }
    .section-soft {
      background: var(--bg-soft);
    }
    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 48px;
    }
    .section-header .eyebrow {
      display: inline-block;
      font-size: 0.8rem;
      font-weight: 700;
      letter-spacing: 0.12em;
      text-transform: uppercase;
      color: var(--accent);
      background: var(--accent-soft);
      padding: 4px 16px;
      border-radius: 100px;
      margin-bottom: 14px;
    }
    .section-header p {
      color: var(--text-muted);
      font-size: 1.05rem;
      max-width: 600px;
      margin: 12px auto 0;
    }
    .nav-links {
      gap: 0;
    }
    .nav-links a {
      padding: 6px 14px;
      font-weight: 500;
      color: var(--text-dark);
      border-radius: 40px;
      transition: background var(--transition), color var(--transition);
    }
    .nav-links a:hover {
      background: rgba(0, 180, 198, 0.1);
      color: var(--primary);
    }
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(14px);
      border-bottom: 1px solid rgba(0, 160, 180, 0.12);
      padding: 6px 0;
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      min-height: 60px;
    }
    .brand {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 700;
      font-size: 1.2rem;
      color: var(--primary);
    }
    .brand .ai-page-logo {
      max-height: 38px;
      width: auto;
    }
    .nav-wrap {
      display: flex;
      align-items: center;
      gap: 2px;
      flex-wrap: wrap;
    }
    .nav-links {
      display: flex;
      align-items: center;
      flex-wrap: wrap;
    }
    .header-actions {
      display: flex;
      gap: 12px;
      margin-left: 8px;
    }
    .header-actions .btn {
      padding: 8px 20px;
      font-size: 0.85rem;
    }
    .mobile-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 2rem;
      color: var(--primary);
      cursor: pointer;
      line-height: 1;
      padding: 4px 8px;
    }
    @media (max-width: 900px) {
      .nav-wrap {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: #fff;
        padding: 24px;
        flex-direction: column;
        align-items: stretch;
        gap: 18px;
        box-shadow: var(--shadow-md);
        border-top: 1px solid var(--border-light);
      }
      .nav-wrap.open {
        display: flex;
      }
      .nav-links {
        flex-direction: column;
        align-items: flex-start;
        gap: 0;
      }
      .nav-links a {
        padding: 10px 0;
        width: 100%;
        border-radius: 0;
        border-bottom: 1px solid var(--bg-soft);
      }
      .header-actions {
        margin-left: 0;
        flex-direction: column;
      }
      .mobile-toggle {
        display: block;
      }
      .site-header {
        position: relative;
      }
    }
    .hero {
      padding: 64px 0 72px;
      background: linear-gradient(145deg, #e8f6fa 0%, #ffffff 60%, #e0f2f7 100%);
      border-bottom: 1px solid rgba(0, 180, 198, 0.15);
      position: relative;
      overflow: hidden;
    }
    .hero::after {
      content: '';
      position: absolute;
      right: -80px;
      bottom: -120px;
      width: 520px;
      height: 520px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(0, 180, 198, 0.1) 0%, transparent 70%);
      pointer-events: none;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 40px;
      align-items: center;
    }
    .hero-content h1 {
      margin-bottom: 20px;
    }
    .hero-highlight {
      color: var(--accent);
      background: linear-gradient(120deg, #0a6e8a, #00b4c6);
      -webkit-background-clip: text;
      background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-desc {
      font-size: 1.15rem;
      color: var(--text-muted);
      max-width: 560px;
      margin-bottom: 28px;
    }
    .hero-buttons {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 28px;
    }
    .hero-stats {
      display: flex;
      gap: 32px;
      flex-wrap: wrap;
    }
    .hero-stat-item strong {
      display: block;
      font-size: 1.5rem;
      font-weight: 800;
      color: var(--primary);
      letter-spacing: -0.02em;
    }
    .hero-stat-item span {
      font-size: 0.85rem;
      color: var(--text-muted);
    }
    .hero-visual {
      background: rgba(255, 255, 255, 0.7);
      backdrop-filter: blur(8px);
      border-radius: var(--radius-lg);
      padding: 28px 24px;
      border: 1px solid rgba(0, 180, 198, 0.25);
      box-shadow: var(--shadow-md);
      transition: transform var(--transition);
    }
    .hero-visual:hover {
      transform: translateY(-4px);
    }
    .hero-visual h3 {
      font-size: 1rem;
      color: var(--primary);
      margin-bottom: 18px;
      letter-spacing: 0.02em;
    }
    .model-chips {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }
    .model-chips span {
      background: #fff;
      padding: 6px 14px;
      border-radius: 40px;
      font-size: 0.78rem;
      font-weight: 500;
      color: var(--text-dark);
      border: 1px solid var(--border-light);
      transition: all var(--transition);
    }
    .model-chips span:hover {
      border-color: var(--accent);
      background: var(--accent-soft);
      transform: translateY(-2px);
    }
    .hero-rating {
      margin-top: 22px;
      display: flex;
      align-items: center;
      gap: 10px;
      background: var(--accent-soft);
      padding: 12px 16px;
      border-radius: 14px;
      font-weight: 600;
      color: var(--primary);
    }
    .hero-rating .stars {
      color: #f5a623;
      letter-spacing: 2px;
      font-size: 1.2rem;
    }
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 28px;
    }
    @media (max-width: 900px) {
      .hero-grid {
        grid-template-columns: 1fr;
        gap: 32px;
      }
      .grid-3, .grid-4 {
        grid-template-columns: 1fr 1fr;
      }
    }
    @media (max-width: 600px) {
      .grid-3, .grid-4, .grid-2 {
        grid-template-columns: 1fr;
      }
      .hero-stats {
        gap: 20px;
      }
      .section {
        padding: 48px 0;
      }
    }
    .card {
      background: #fff;
      border-radius: var(--radius-md);
      padding: 26px 22px;
      border: 1px solid var(--border-light);
      box-shadow: var(--shadow-sm);
      transition: all var(--transition);
      height: 100%;
      display: flex;
      flex-direction: column;
    }
    .card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-md);
      border-color: rgba(0, 180, 198, 0.45);
    }
    .card-icon {
      font-size: 1.8rem;
      margin-bottom: 14px;
      line-height: 1;
    }
    .card h3 {
      font-size: 1.15rem;
      margin-bottom: 8px;
    }
    .card p {
      color: var(--text-muted);
      font-size: 0.94rem;
      flex: 1;
    }
    .card-tag {
      display: inline-block;
      background: var(--accent-soft);
      color: var(--primary);
      font-size: 0.72rem;
      font-weight: 600;
      padding: 4px 12px;
      border-radius: 40px;
      margin-top: 14px;
      align-self: flex-start;
    }
    .table-wrap {
      overflow-x: auto;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-light);
      background: #fff;
      box-shadow: var(--shadow-sm);
    }
    table {
      width: 100%;
      border-collapse: collapse;
      font-size: 0.92rem;
      min-width: 680px;
    }
    th {
      background: var(--bg-soft);
      color: var(--text-dark);
      font-weight: 700;
      padding: 16px 18px;
      text-align: left;
      border-bottom: 1px solid var(--border-light);
    }
    td {
      padding: 14px 18px;
      border-bottom: 1px solid #eaf2f7;
      color: var(--text-body);
      vertical-align: top;
    }
    tr:last-child td {
      border-bottom: none;
    }
    .rating-stars {
      color: #f5a623;
      letter-spacing: 2px;
      font-size: 1rem;
    }
    .score-badge {
      display: inline-flex;
      align-items: baseline;
      gap: 2px;
      font-weight: 800;
      color: var(--accent);
      font-size: 1.4rem;
    }
    .score-badge small {
      font-size: 0.8rem;
      color: var(--text-muted);
      font-weight: 400;
    }
    .timeline {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      justify-content: center;
    }
    .timeline-step {
      flex: 1 1 160px;
      background: #fff;
      border-radius: var(--radius-sm);
      padding: 20px 16px;
      text-align: center;
      border: 1px solid var(--border-light);
      transition: all var(--transition);
      box-shadow: var(--shadow-sm);
    }
    .timeline-step:hover {
      border-color: var(--accent);
      transform: translateY(-3px);
    }
    .timeline-step .step-num {
      font-size: 1.8rem;
      font-weight: 800;
      color: var(--accent);
      line-height: 1.2;
    }
    .timeline-step h4 {
      font-size: 1rem;
      margin: 8px 0 4px;
    }
    .timeline-step p {
      font-size: 0.85rem;
      color: var(--text-muted);
    }
    .faq-list {
      max-width: 860px;
      margin: 0 auto;
    }
    .faq-item {
      border-bottom: 1px solid var(--border-light);
      padding: 4px 0;
    }
    .faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 18px 0;
      cursor: pointer;
      font-weight: 600;
      color: var(--text-dark);
      gap: 16px;
      transition: color var(--transition);
    }
    .faq-question:hover {
      color: var(--accent);
    }
    .faq-question .icon {
      font-size: 1.5rem;
      line-height: 1;
      color: var(--accent);
      transition: transform var(--transition);
      flex-shrink: 0;
    }
    .faq-item.open .faq-question .icon {
      transform: rotate(45deg);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease, padding 0.3s ease;
      color: var(--text-muted);
      font-size: 0.95rem;
      padding-right: 32px;
    }
    .faq-item.open .faq-answer {
      max-height: 220px;
      padding-bottom: 18px;
    }
    .review-card {
      background: #fff;
      border-radius: var(--radius-md);
      padding: 22px;
      border: 1px solid var(--border-light);
      box-shadow: var(--shadow-sm);
      transition: all var(--transition);
      height: 100%;
      display: flex;
      flex-direction: column;
    }
    .review-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-md);
    }
    .review-card .stars {
      color: #f5a623;
      letter-spacing: 2px;
      margin-bottom: 8px;
    }
    .review-card blockquote {
      font-size: 0.95rem;
      color: var(--text-body);
      flex: 1;
      margin-bottom: 12px;
    }
    .review-author {
      font-weight: 700;
      color: var(--primary);
      font-size: 0.9rem;
    }
    .review-role {
      font-size: 0.8rem;
      color: var(--text-muted);
    }
    .article-list {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }
    @media (max-width: 800px) {
      .article-list {
        grid-template-columns: 1fr;
      }
    }
    .article-card {
      background: #fff;
      border-radius: var(--radius-sm);
      padding: 20px;
      border: 1px solid var(--border-light);
      transition: all var(--transition);
      display: flex;
      flex-direction: column;
    }
    .article-card:hover {
      border-color: var(--accent);
      transform: translateY(-3px);
      box-shadow: var(--shadow-sm);
    }
    .article-card .date {
      font-size: 0.78rem;
      color: var(--accent);
      font-weight: 600;
      margin-bottom: 6px;
    }
    .article-card h4 {
      font-size: 1rem;
      margin-bottom: 8px;
      color: var(--text-dark);
    }
    .article-card p {
      font-size: 0.88rem;
      color: var(--text-muted);
      margin-bottom: 12px;
      flex: 1;
    }
    .article-card .read-more {
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--primary-light);
    }
    .form-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
    }
    @media (max-width: 700px) {
      .form-grid {
        grid-template-columns: 1fr;
      }
    }
    .form-group {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }
    .form-group label {
      font-weight: 600;
      font-size: 0.9rem;
      color: var(--text-dark);
    }
    .form-group input, .form-group select, .form-group textarea {
      padding: 12px 16px;
      border-radius: 14px;
      border: 1px solid var(--border-light);
      background: #fff;
      font-family: inherit;
      font-size: 0.95rem;
      transition: border var(--transition), box-shadow var(--transition);
      color: var(--text-dark);
    }
    .form-group input:focus, .form-group select:focus, .form-group textarea:focus {
      outline: none;
      border-color: var(--accent);
      box-shadow: 0 0 0 3px rgba(0, 180, 198, 0.15);
    }
    .form-group textarea {
      resize: vertical;
      min-height: 100px;
    }
    .form-full {
      grid-column: 1 / -1;
    }
    .footer {
      background: #0a2a3b;
      color: #cbdbe6;
      padding: 48px 0 0;
      border-top: 1px solid #1f4557;
    }
    .footer a {
      color: #b0d0e0;
      transition: color var(--transition);
    }
    .footer a:hover {
      color: #7fd9e8;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 40px;
      padding-bottom: 32px;
      border-bottom: 1px solid #1f4557;
    }
    @media (max-width: 800px) {
      .footer-grid {
        grid-template-columns: 1fr;
        gap: 28px;
      }
    }
    .footer h4 {
      color: #fff;
      font-size: 1rem;
      margin-bottom: 16px;
    }
    .footer ul li {
      margin-bottom: 8px;
      font-size: 0.9rem;
    }
    .footer-bottom {
      padding: 20px 0;
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      align-items: center;
      font-size: 0.82rem;
      color: #8aaebf;
    }
    .footer-bottom a {
      color: #8aaebf;
    }
    .float-kefu {
      position: fixed;
      right: 20px;
      bottom: 100px;
      z-index: 200;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 8px;
    }
    .float-kefu .kefu-btn {
      width: 52px;
      height: 52px;
      border-radius: 50%;
      background: var(--accent);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.5rem;
      box-shadow: 0 8px 20px rgba(0, 180, 198, 0.4);
      transition: all var(--transition);
      cursor: pointer;
      border: none;
    }
    .float-kefu .kefu-btn:hover {
      background: #009eaf;
      transform: scale(1.05);
    }
    .kefu-pop {
      display: none;
      background: #fff;
      border-radius: 16px;
      padding: 16px;
      box-shadow: var(--shadow-md);
      border: 1px solid var(--border-light);
      text-align: center;
      width: 180px;
    }
    .kefu-pop img {
      max-width: 100%;
      height: auto;
      margin-bottom: 8px;
      border-radius: 8px;
    }
    .kefu-pop p {
      font-size: 0.8rem;
      color: var(--text-muted);
    }
    .float-kefu.open .kefu-pop {
      display: block;
    }
    .back-top {
      position: fixed;
      right: 20px;
      bottom: 30px;
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #fff;
      border: 1px solid var(--border-light);
      box-shadow: var(--shadow-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.2rem;
      color: var(--primary);
      cursor: pointer;
      z-index: 200;
      transition: all var(--transition);
      opacity: 0;
      visibility: hidden;
    }
    .back-top.show {
      opacity: 1;
      visibility: visible;
    }
    .back-top:hover {
      background: var(--accent-soft);
    }
    .fade-up {
      opacity: 0;
      transform: translateY(24px);
      transition: opacity 0.7s ease, transform 0.7s ease;
    }
    .fade-up.visible {
      opacity: 1;
      transform: translateY(0);
    }
    .tag-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
    }
    .tag-cloud span {
      background: #fff;
      border: 1px solid var(--border-light);
      padding: 6px 16px;
      border-radius: 40px;
      font-size: 0.85rem;
      color: var(--text-muted);
      transition: all var(--transition);
    }
    .tag-cloud span:hover {
      border-color: var(--accent);
      background: var(--accent-soft);
      color: var(--primary);
    }
    .link-group {
      display: flex;
      flex-wrap: wrap;
      gap: 12px 24px;
      justify-content: center;
    }
    .link-group a {
      font-size: 0.88rem;
      color: var(--text-muted);
    }
    .link-group a:hover {
      color: var(--accent);
    }
    .case-strip {
      display: grid;
      grid-template-columns: 1fr 1fr 1fr;
      gap: 20px;
    }
    @media (max-width: 750px) {
      .case-strip {
        grid-template-columns: 1fr;
      }
    }
    .case-item {
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-light);
      background: #fff;
      transition: all var(--transition);
    }
    .case-item:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-md);
    }
    .case-item img {
      width: 100%;
      aspect-ratio: 16/10;
      object-fit: cover;
    }
    .case-item .case-body {
      padding: 16px;
    }
    .case-item h4 {
      font-size: 1rem;
      margin-bottom: 4px;
    }
    .case-item p {
      font-size: 0.85rem;
      color: var(--text-muted);
    }
    .service-net {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      justify-content: center;
      margin-top: 24px;
    }
    .service-net span {
      background: var(--bg-soft);
      padding: 8px 20px;
      border-radius: 40px;
      font-size: 0.85rem;
      font-weight: 500;
      color: var(--text-body);
      border: 1px solid transparent;
      transition: all var(--transition);
    }
    .service-net span:hover {
      background: #fff;
      border-color: var(--accent);
    }
    .price-note {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      justify-content: center;
      margin-top: 18px;
    }
    .price-note-item {
      background: #fff;
      border-radius: 40px;
      padding: 8px 20px;
      font-size: 0.85rem;
      border: 1px solid var(--border-light);
      color: var(--text-muted);
    }
    .link-list-inline {
      display: flex;
      flex-wrap: wrap;
      gap: 8px 18px;
      justify-content: center;
    }
    .link-list-inline a {
      font-size: 0.82rem;
      color: var(--text-muted);
    }