:root {
      --primary: #0d47a1;
      --primary-bright: #1565c0;
      --primary-light: #e3f2fd;
      --accent: #00b0ff;
      --accent-warm: #ff6d00;
      --text-main: #1a202c;
      --text-muted: #4a5568;
      --text-light: #718096;
      --bg-base: #f8fafc;
      --bg-surface: #ffffff;
      --border-color: #e2e8f0;
      --shadow-sm: 0 2px 4px rgba(13, 71, 161, 0.05);
      --shadow-md: 0 6px 18px rgba(13, 71, 161, 0.08);
      --shadow-lg: 0 12px 32px rgba(13, 71, 161, 0.12);
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 16px;
      --transition: all 0.28s ease;
    }

    *, *::before, *::after {
      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;
      overflow-x: hidden;
      min-width: 320px;
    }

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

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    .container {
      width: 100%;
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .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 {
      width: 130px;
      display: flex;
      align-items: center;
    }

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

    .nav-links li a {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-main);
      padding: 8px 12px;
      border-radius: var(--radius-sm);
    }

    .nav-links li a:hover {
      color: var(--primary-bright);
      background-color: 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;
      border: 1px solid transparent;
      transition: var(--transition);
      white-space: nowrap;
    }

    .btn-primary {
      background-color: var(--primary-bright);
      color: #ffffff;
      box-shadow: 0 4px 12px rgba(21, 101, 192, 0.25);
    }

    .btn-primary:hover {
      background-color: var(--primary);
      transform: translateY(-2px);
      box-shadow: 0 6px 16px rgba(13, 71, 161, 0.35);
    }

    .btn-outline {
      border-color: var(--primary-bright);
      color: var(--primary-bright);
      background-color: transparent;
    }

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

    .nav-toggle {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 8px;
    }

    .nav-toggle span {
      display: block;
      width: 24px;
      height: 2px;
      background-color: var(--primary);
      margin: 5px 0;
      transition: var(--transition);
    }

    /* 首屏 Hero */
    .hero-section {
      position: relative;
      background: linear-gradient(135deg, #0d47a1 0%, #1565c0 45%, #0091ea 100%);
      color: #ffffff;
      padding: 80px 0 90px;
      overflow: hidden;
    }

    .hero-section::before {
      content: "";
      position: absolute;
      top: -40%;
      right: -10%;
      width: 600px;
      height: 600px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(0, 176, 255, 0.25) 0%, rgba(255, 255, 255, 0) 70%);
      pointer-events: none;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 40px;
      align-items: center;
      position: relative;
      z-index: 1;
    }

    .hero-content h1 {
      font-size: 2.35rem;
      font-weight: 800;
      line-height: 1.35;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
      color: #ffffff;
    }

    .hero-content p {
      font-size: 1.1rem;
      line-height: 1.7;
      color: #e3f2fd;
      margin-bottom: 30px;
    }

    .hero-cta-group {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 36px;
    }

    .btn-hero-primary {
      background-color: #ffffff;
      color: var(--primary);
      font-size: 1.05rem;
      padding: 12px 30px;
      box-shadow: 0 4px 14px rgba(0, 0, 0, 0.15);
    }

    .btn-hero-primary:hover {
      background-color: #f0f7ff;
      transform: translateY(-2px);
    }

    .btn-hero-accent {
      background-color: var(--accent-warm);
      color: #ffffff;
      font-size: 1.05rem;
      padding: 12px 28px;
    }

    .btn-hero-accent:hover {
      background-color: #e65100;
      transform: translateY(-2px);
    }

    .hero-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
    }

    .hero-tag {
      background: rgba(255, 255, 255, 0.15);
      border: 1px solid rgba(255, 255, 255, 0.25);
      padding: 5px 12px;
      border-radius: 20px;
      font-size: 0.85rem;
      color: #ffffff;
    }

    .hero-card-panel {
      background: rgba(255, 255, 255, 0.1);
      border: 1px solid rgba(255, 255, 255, 0.25);
      border-radius: var(--radius-lg);
      padding: 28px;
      backdrop-filter: blur(12px);
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
    }

    .hero-card-panel h3 {
      font-size: 1.25rem;
      margin-bottom: 16px;
      color: #ffffff;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .hero-stat-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 16px;
      margin-bottom: 20px;
    }

    .hero-stat-item {
      background: rgba(255, 255, 255, 0.12);
      padding: 16px;
      border-radius: var(--radius-md);
      text-align: center;
    }

    .hero-stat-item .val {
      font-size: 1.7rem;
      font-weight: 700;
      color: #00e5ff;
      line-height: 1.2;
    }

    .hero-stat-item .lbl {
      font-size: 0.85rem;
      color: #cfd8dc;
      margin-top: 4px;
    }

    .model-badge-row {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: 15px;
    }

    .model-badge {
      background: rgba(0, 0, 0, 0.2);
      padding: 4px 10px;
      border-radius: 4px;
      font-size: 0.8rem;
      color: #e0f2fe;
      border: 1px solid rgba(255, 255, 255, 0.15);
    }

    /* 公共区域标题 */
    .section-wrap {
      padding: 70px 0;
    }

    .section-title-box {
      text-align: center;
      max-width: 780px;
      margin: 0 auto 50px;
    }

    .section-subtitle {
      font-size: 0.88rem;
      font-weight: 700;
      color: var(--primary-bright);
      text-transform: uppercase;
      letter-spacing: 1px;
      margin-bottom: 8px;
      display: inline-block;
      background: var(--primary-light);
      padding: 4px 12px;
      border-radius: 20px;
    }

    .section-title {
      font-size: 2rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
    }

    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 关于我们 / 平台介绍 */
    .intro-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 36px;
      align-items: center;
    }

    .intro-text p {
      font-size: 1.02rem;
      color: var(--text-muted);
      margin-bottom: 16px;
      line-height: 1.7;
    }

    .intro-features {
      list-style: none;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
      margin-top: 24px;
    }

    .intro-features li {
      display: flex;
      align-items: center;
      gap: 8px;
      font-weight: 600;
      color: var(--text-main);
      font-size: 0.95rem;
    }

    .intro-features li::before {
      content: "✓";
      color: var(--primary-bright);
      font-weight: bold;
    }

    .intro-highlight-card {
      background: linear-gradient(145deg, #ffffff, #f0f7ff);
      border: 1px solid var(--border-color);
      border-left: 6px solid var(--primary-bright);
      padding: 32px;
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-md);
    }

    .intro-highlight-card h4 {
      font-size: 1.25rem;
      color: var(--primary);
      margin-bottom: 14px;
    }

    /* 服务与场景卡片 */
    .cards-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
      gap: 24px;
    }

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

    .service-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-lg);
      border-color: #90caf9;
    }

    .card-icon {
      width: 44px;
      height: 44px;
      border-radius: var(--radius-sm);
      background: var(--primary-light);
      color: var(--primary-bright);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.25rem;
      margin-bottom: 16px;
      font-weight: bold;
    }

    .service-card h4 {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }

    .service-card p {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.55;
      flex-grow: 1;
    }

    .card-tag {
      display: inline-block;
      margin-top: 14px;
      font-size: 0.8rem;
      color: var(--primary);
      background: #e8f4fd;
      padding: 3px 8px;
      border-radius: 4px;
      align-self: flex-start;
    }

    /* 流程步骤 */
    .process-timeline {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }

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

    .timeline-step .step-num {
      width: 38px;
      height: 38px;
      border-radius: 50%;
      background: var(--primary);
      color: #ffffff;
      margin: 0 auto 14px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1.1rem;
    }

    .timeline-step h4 {
      font-size: 1.1rem;
      margin-bottom: 8px;
      color: var(--text-main);
    }

    .timeline-step p {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 案例中心 */
    .case-grid {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 30px;
      align-items: center;
    }

    .case-banner-group {
      display: grid;
      gap: 16px;
    }

    .case-banner-group img {
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-color);
    }

    .case-content h3 {
      font-size: 1.5rem;
      color: var(--text-main);
      margin-bottom: 14px;
    }

    .case-content p {
      font-size: 0.98rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 20px;
    }

    .case-stats {
      display: flex;
      gap: 20px;
      margin-bottom: 24px;
    }

    .case-stat-box {
      border-left: 3px solid var(--accent);
      padding-left: 12px;
    }

    .case-stat-box .num {
      font-size: 1.4rem;
      font-weight: 700;
      color: var(--primary-bright);
    }

    .case-stat-box .txt {
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    /* 对比评测 */
    .rating-banner {
      background: linear-gradient(90deg, #102a43, #1565c0);
      color: #ffffff;
      padding: 24px 30px;
      border-radius: var(--radius-md);
      margin-bottom: 28px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 16px;
    }

    .rating-score {
      display: flex;
      align-items: center;
      gap: 14px;
    }

    .score-val {
      font-size: 2.6rem;
      font-weight: 800;
      color: #ffd600;
      line-height: 1;
    }

    .stars {
      color: #ffab00;
      font-size: 1.4rem;
      letter-spacing: 2px;
    }

    .table-container {
      background: var(--bg-surface);
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      overflow-x: auto;
      box-shadow: var(--shadow-sm);
    }

    .comparison-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 680px;
    }

    .comparison-table th, .comparison-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
      font-size: 0.95rem;
    }

    .comparison-table th {
      background-color: #f1f5f9;
      color: var(--text-main);
      font-weight: 700;
    }

    .comparison-table tr:hover {
      background-color: #f8fafc;
    }

    .comparison-table .highlight-col {
      background-color: rgba(21, 101, 192, 0.04);
      font-weight: 600;
      color: var(--primary);
    }

    /* Token比价 */
    .token-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
      gap: 20px;
    }

    .token-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      text-align: center;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

    .token-card:hover {
      border-color: var(--primary-bright);
      transform: translateY(-4px);
    }

    .token-card h4 {
      font-size: 1.2rem;
      color: var(--text-main);
      margin-bottom: 12px;
    }

    .token-price {
      font-size: 2rem;
      font-weight: 800;
      color: var(--accent-warm);
      margin-bottom: 8px;
    }

    .token-unit {
      font-size: 0.85rem;
      color: var(--text-light);
      margin-bottom: 16px;
    }

    .token-list {
      list-style: none;
      text-align: left;
      font-size: 0.88rem;
      color: var(--text-muted);
      margin-bottom: 20px;
      line-height: 1.8;
    }

    .token-list li::before {
      content: "•";
      color: var(--primary-bright);
      font-weight: bold;
      margin-right: 6px;
    }

    /* 客户评价 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
      gap: 24px;
    }

    .review-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-sm);
    }

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

    .review-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: bold;
    }

    .review-user h5 {
      font-size: 0.95rem;
      color: var(--text-main);
    }

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

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

    /* 行业资讯与最新文章 */
    .news-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 28px;
    }

    .news-block {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
    }

    .news-block h4 {
      font-size: 1.15rem;
      margin-bottom: 16px;
      color: var(--primary);
      border-bottom: 2px solid var(--primary-light);
      padding-bottom: 8px;
    }

    .article-links-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .article-links-list li a {
      font-size: 0.92rem;
      color: var(--text-main);
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 6px 0;
      border-bottom: 1px dashed #edf2f7;
    }

    .article-links-list li a:hover {
      color: var(--primary-bright);
      padding-left: 4px;
    }

    /* FAQ 折叠面板 */
    .faq-list {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .faq-item {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      overflow: hidden;
      transition: var(--transition);
    }

    .faq-question {
      width: 100%;
      text-align: left;
      background: none;
      border: none;
      padding: 18px 20px;
      font-size: 1rem;
      font-weight: 600;
      color: var(--text-main);
      display: flex;
      align-items: center;
      justify-content: space-between;
      cursor: pointer;
    }

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

    .faq-icon {
      font-size: 1.2rem;
      transition: transform 0.25s ease;
      color: var(--primary);
    }

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      background: #fbfdff;
    }

    .faq-item.active .faq-answer {
      max-height: 300px;
      padding: 0 20px 18px;
    }

    .faq-answer p {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 表单与联系我们 */
    .contact-wrapper {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 36px;
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-sm);
    }

    .form-box h3 {
      font-size: 1.4rem;
      margin-bottom: 20px;
      color: var(--text-main);
    }

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

    .form-group label {
      display: block;
      font-size: 0.88rem;
      font-weight: 600;
      margin-bottom: 6px;
      color: var(--text-main);
    }

    .form-control {
      width: 100%;
      padding: 11px 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.92rem;
      outline: none;
      transition: var(--transition);
      background-color: #fbfcfe;
    }

    .form-control:focus {
      border-color: var(--primary-bright);
      background-color: #ffffff;
      box-shadow: 0 0 0 3px rgba(21, 101, 192, 0.12);
    }

    textarea.form-control {
      resize: vertical;
      min-height: 95px;
    }

    .contact-info-panel {
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      border-left: 1px solid var(--border-color);
      padding-left: 36px;
    }

    .contact-channels {
      display: flex;
      flex-direction: column;
      gap: 16px;
      margin-bottom: 24px;
    }

    .channel-item {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      font-size: 0.95rem;
    }

    .channel-title {
      font-weight: 600;
      color: var(--text-main);
      width: 90px;
    }

    .channel-val {
      color: var(--text-muted);
      flex: 1;
    }

    .qr-group {
      display: flex;
      align-items: center;
      gap: 20px;
      background: #f8fafc;
      padding: 16px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
    }

    .qr-img-wrap {
      width: 105px;
      height: 105px;
      background: #fff;
      padding: 4px;
      border-radius: var(--radius-sm);
      border: 1px solid #e2e8f0;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .qr-text h5 {
      font-size: 0.95rem;
      margin-bottom: 4px;
      color: var(--text-main);
    }

    .qr-text p {
      font-size: 0.82rem;
      color: var(--text-muted);
      line-height: 1.4;
    }

    /* 友情链接与页脚 */
    .site-footer {
      background-color: #0b192c;
      color: #94a3b8;
      padding: 50px 0 24px;
      font-size: 0.88rem;
    }

    .footer-container {
      display: flex;
      flex-direction: column;
      gap: 28px;
    }

    .footer-links-row {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 14px;
      padding-bottom: 20px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }

    .footer-links-row span {
      color: #ffffff;
      font-weight: 600;
    }

    .footer-links-row a {
      color: #94a3b8;
    }

    .footer-links-row a:hover {
      color: #ffffff;
    }

    .footer-bottom {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
    }

    .footer-bottom p {
      color: #64748b;
    }

    /* 悬浮工具栏 */
    .float-toolbar {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 990;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 46px;
      height: 46px;
      border-radius: 50%;
      background: var(--primary);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
      cursor: pointer;
      border: none;
      transition: var(--transition);
      font-size: 1.1rem;
    }

    .float-btn:hover {
      background: var(--accent);
      transform: scale(1.08);
    }

    /* 响应式调整 */
    @media (max-width: 992px) {
      .hero-grid {
        grid-template-columns: 1fr;
      }
      .intro-grid, .case-grid, .news-grid, .contact-wrapper {
        grid-template-columns: 1fr;
      }
      .contact-info-panel {
        border-left: none;
        border-top: 1px solid var(--border-color);
        padding-left: 0;
        padding-top: 30px;
      }
      .process-timeline {
        grid-template-columns: repeat(2, 1fr);
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #ffffff;
        flex-direction: column;
        padding: 20px;
        box-shadow: var(--shadow-md);
        border-bottom: 1px solid var(--border-color);
      }
      .nav-links.active {
        display: flex;
      }
      .nav-toggle {
        display: block;
      }
      .header-actions {
        display: none;
      }
    }

    @media (max-width: 600px) {
      .hero-content h1 {
        font-size: 1.75rem;
      }
      .process-timeline {
        grid-template-columns: 1fr;
      }
      .hero-stat-grid {
        grid-template-columns: 1fr;
      }
      .rating-banner {
        flex-direction: column;
        align-items: flex-start;
      }
      .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
      }
    }