* {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background: #f0f7f9;
      color: #1a2e35;
      line-height: 1.65;
      -webkit-font-smoothing: antialiased;
    }
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }
    /* ===== 顶部导航 ===== */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(0, 140, 150, 0.12);
      transition: box-shadow 0.3s ease;
    }
    .site-header.scrolled {
      box-shadow: 0 4px 20px rgba(0, 100, 110, 0.08);
    }
    .nav-container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      min-height: 68px;
      gap: 16px;
    }
    .nav-brand {
      display: flex;
      align-items: center;
      gap: 10px;
      text-decoration: none;
      flex-shrink: 0;
    }
    .nav-brand img {
      width: 34px;
      height: 34px;
      object-fit: contain;
      border-radius: 8px;
    }
    .nav-brand-text {
      font-size: 1.2rem;
      font-weight: 700;
      color: #006b73;
      letter-spacing: 0.5px;
      white-space: nowrap;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
      flex-wrap: wrap;
      justify-content: flex-end;
    }
    .nav-links li a {
      display: inline-block;
      padding: 8px 12px;
      font-size: 0.9rem;
      color: #1e3a40;
      text-decoration: none;
      border-radius: 8px;
      transition: background 0.25s, color 0.25s;
      font-weight: 500;
    }
    .nav-links li a:hover {
      background: rgba(0, 150, 160, 0.08);
      color: #008b94;
    }
    .nav-cta {
      flex-shrink: 0;
    }
    .nav-cta a {
      display: inline-block;
      padding: 9px 22px;
      background: linear-gradient(135deg, #00a6b0, #007d86);
      color: #fff;
      font-size: 0.9rem;
      font-weight: 600;
      border-radius: 999px;
      text-decoration: none;
      box-shadow: 0 4px 14px rgba(0, 140, 150, 0.3);
      transition: transform 0.25s, box-shadow 0.25s;
      white-space: nowrap;
    }
    .nav-cta a:hover {
      transform: translateY(-2px);
      box-shadow: 0 7px 20px rgba(0, 140, 150, 0.4);
    }
    .menu-toggle {
      display: none;
      background: none;
      border: 1px solid #b0d6d9;
      border-radius: 8px;
      width: 40px;
      height: 40px;
      cursor: pointer;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 4px;
      padding: 0;
    }
    .menu-toggle span {
      display: block;
      width: 20px;
      height: 2px;
      background: #008b94;
      border-radius: 2px;
      transition: 0.3s;
    }
    .menu-toggle.active span:nth-child(1) {
      transform: translateY(6px) rotate(45deg);
    }
    .menu-toggle.active span:nth-child(2) {
      opacity: 0;
    }
    .menu-toggle.active span:nth-child(3) {
      transform: translateY(-6px) rotate(-45deg);
    }
    /* ===== Hero 首屏 ===== */
    .hero {
      position: relative;
      overflow: hidden;
      background: linear-gradient(160deg, #e3f6f8 0%, #d0f0f3 30%, #eaf9fa 65%, #f5fdfe 100%);
      padding: 70px 0 80px;
      min-height: 480px;
    }
    .hero::before {
      content: '';
      position: absolute;
      top: -160px;
      right: -120px;
      width: 520px;
      height: 520px;
      background: radial-gradient(circle, rgba(0, 190, 200, 0.18) 0%, rgba(0, 190, 200, 0) 70%);
      border-radius: 50%;
      pointer-events: none;
    }
    .hero::after {
      content: '';
      position: absolute;
      bottom: -180px;
      left: -100px;
      width: 460px;
      height: 460px;
      background: radial-gradient(circle, rgba(0, 130, 150, 0.12) 0%, rgba(0, 130, 150, 0) 70%);
      border-radius: 50%;
      pointer-events: none;
    }
    .hero-container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
      position: relative;
      z-index: 2;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 48px;
      flex-wrap: wrap;
    }
    .hero-content {
      flex: 1 1 460px;
      max-width: 600px;
      animation: fadeUp 0.8s ease both;
    }
    @keyframes fadeUp {
      from { opacity: 0; transform: translateY(24px); }
      to { opacity: 1; transform: translateY(0); }
    }
    .hero-badge {
      display: inline-block;
      padding: 6px 16px;
      background: rgba(0, 150, 160, 0.1);
      color: #007d86;
      font-size: 0.82rem;
      font-weight: 600;
      border-radius: 999px;
      border: 1px solid rgba(0, 150, 160, 0.25);
      margin-bottom: 20px;
      letter-spacing: 0.5px;
    }
    .hero h1 {
      font-size: clamp(1.9rem, 4vw, 2.8rem);
      font-weight: 800;
      line-height: 1.25;
      color: #0d3b42;
      margin-bottom: 18px;
      letter-spacing: -0.5px;
    }
    .hero h1 .highlight {
      color: #008b94;
      position: relative;
    }
    .hero-desc {
      font-size: 1.05rem;
      color: #3c5a61;
      margin-bottom: 28px;
      max-width: 520px;
    }
    .hero-actions {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
      align-items: center;
      margin-bottom: 36px;
    }
    .btn-primary {
      display: inline-block;
      padding: 14px 36px;
      background: linear-gradient(135deg, #00a6b0, #007d86);
      color: #fff;
      font-size: 1rem;
      font-weight: 700;
      border-radius: 999px;
      text-decoration: none;
      border: none;
      cursor: pointer;
      box-shadow: 0 6px 22px rgba(0, 140, 150, 0.35);
      transition: transform 0.25s, box-shadow 0.25s;
      letter-spacing: 0.5px;
    }
    .btn-primary:hover {
      transform: translateY(-3px);
      box-shadow: 0 10px 30px rgba(0, 140, 150, 0.45);
    }
    .btn-secondary {
      display: inline-block;
      padding: 13px 32px;
      background: transparent;
      color: #006b73;
      font-size: 1rem;
      font-weight: 600;
      border-radius: 999px;
      text-decoration: none;
      border: 2px solid #009aa3;
      transition: background 0.25s, transform 0.25s;
    }
    .btn-secondary:hover {
      background: rgba(0, 150, 160, 0.08);
      transform: translateY(-2px);
    }
    .hero-stats {
      display: flex;
      gap: 32px;
      flex-wrap: wrap;
    }
    .hero-stat-item {
      display: flex;
      flex-direction: column;
    }
    .hero-stat-item strong {
      font-size: 1.45rem;
      font-weight: 800;
      color: #007d86;
    }
    .hero-stat-item span {
      font-size: 0.82rem;
      color: #5a7a80;
    }
    .hero-visual {
      flex: 1 1 300px;
      max-width: 440px;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
      animation: fadeUp 0.9s 0.15s ease both;
    }
    .hero-visual-card {
      background: rgba(255, 255, 255, 0.75);
      border: 1px solid rgba(0, 150, 160, 0.18);
      border-radius: 16px;
      padding: 20px 16px;
      backdrop-filter: blur(6px);
      transition: transform 0.3s, box-shadow 0.3s;
      cursor: default;
    }
    .hero-visual-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 10px 28px rgba(0, 120, 130, 0.12);
    }
    .hero-visual-card:nth-child(2) {
      margin-top: 20px;
    }
    .hero-visual-card:nth-child(3) {
      margin-top: -10px;
    }
    .hero-visual-icon {
      width: 36px;
      height: 36px;
      border-radius: 10px;
      background: linear-gradient(135deg, #00b8c2, #008b94);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 10px;
    }
    .hero-visual-icon svg {
      width: 20px;
      height: 20px;
      stroke: #fff;
    }
    .hero-visual-card h3 {
      font-size: 0.92rem;
      font-weight: 700;
      color: #0d3b42;
      margin-bottom: 4px;
    }
    .hero-visual-card p {
      font-size: 0.78rem;
      color: #5a7a80;
      line-height: 1.5;
    }
    /* ===== 区块通用 ===== */
    .section {
      padding: 64px 0;
      position: relative;
    }
    .section-alt {
      background: linear-gradient(180deg, #f0f7f9 0%, #e8f4f6 100%);
    }
    .section-header {
      text-align: center;
      margin-bottom: 44px;
    }
    .section-tag {
      display: inline-block;
      padding: 5px 14px;
      background: rgba(0, 150, 160, 0.1);
      color: #007d86;
      font-size: 0.78rem;
      font-weight: 600;
      border-radius: 999px;
      margin-bottom: 14px;
      letter-spacing: 1px;
    }
    .section-header h2 {
      font-size: clamp(1.5rem, 3vw, 2.1rem);
      font-weight: 800;
      color: #0d3b42;
      margin-bottom: 12px;
      line-height: 1.3;
    }
    .section-header p {
      font-size: 0.98rem;
      color: #4e6d74;
      max-width: 620px;
      margin: 0 auto;
    }
    /* ===== 关于我们 ===== */
    .about-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: stretch;
    }
    .about-text {
      display: flex;
      flex-direction: column;
      justify-content: center;
    }
    .about-text h2 {
      font-size: 1.7rem;
      font-weight: 800;
      color: #0d3b42;
      margin-bottom: 16px;
    }
    .about-text p {
      font-size: 0.96rem;
      color: #3c5a61;
      margin-bottom: 14px;
      line-height: 1.75;
    }
    .about-features {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 14px;
    }
    .about-feature-item {
      background: #fff;
      border-radius: 12px;
      padding: 18px 16px;
      border: 1px solid #d6ecef;
      transition: transform 0.25s, box-shadow 0.25s;
    }
    .about-feature-item:hover {
      transform: translateY(-3px);
      box-shadow: 0 8px 20px rgba(0, 120, 130, 0.1);
    }
    .about-feature-item strong {
      display: block;
      font-size: 0.95rem;
      color: #006b73;
      margin-bottom: 4px;
    }
    .about-feature-item span {
      font-size: 0.82rem;
      color: #5a7a80;
    }
    /* ===== 服务能力 ===== */
    .service-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
      gap: 20px;
    }
    .service-card {
      background: #fff;
      border-radius: 16px;
      padding: 24px 20px;
      border: 1px solid #d9edef;
      transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
      display: flex;
      flex-direction: column;
    }
    .service-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 12px 30px rgba(0, 120, 130, 0.1);
      border-color: #9ed8dd;
    }
    .service-icon {
      width: 44px;
      height: 44px;
      border-radius: 12px;
      background: linear-gradient(135deg, #dff5f7, #c3eaee);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 14px;
    }
    .service-icon svg {
      width: 22px;
      height: 22px;
      stroke: #008b94;
    }
    .service-card h3 {
      font-size: 1rem;
      font-weight: 700;
      color: #0d3b42;
      margin-bottom: 8px;
    }
    .service-card p {
      font-size: 0.84rem;
      color: #5a7a80;
      line-height: 1.6;
      flex: 1;
    }
    /* ===== 流程步骤 ===== */
    .steps-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
      gap: 20px;
      counter-reset: step;
    }
    .step-item {
      background: #fff;
      border-radius: 14px;
      padding: 26px 18px 22px;
      border: 1px solid #d9edef;
      text-align: center;
      position: relative;
      transition: transform 0.25s, box-shadow 0.25s;
    }
    .step-item:hover {
      transform: translateY(-4px);
      box-shadow: 0 10px 24px rgba(0, 120, 130, 0.1);
    }
    .step-number {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: linear-gradient(135deg, #00a6b0, #007d86);
      color: #fff;
      font-weight: 800;
      font-size: 1rem;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 14px;
    }
    .step-item h3 {
      font-size: 0.95rem;
      font-weight: 700;
      color: #0d3b42;
      margin-bottom: 6px;
    }
    .step-item p {
      font-size: 0.8rem;
      color: #5a7a80;
      line-height: 1.55;
    }
    /* ===== 对比评测 ===== */
    .compare-wrap {
      background: #fff;
      border-radius: 20px;
      border: 1px solid #d9edef;
      overflow: hidden;
      box-shadow: 0 10px 40px rgba(0, 120, 130, 0.06);
    }
    .compare-highlight {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
      padding: 28px 32px;
      background: linear-gradient(135deg, #e6f9fa, #d0f2f4);
      flex-wrap: wrap;
    }
    .compare-score {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .compare-score-num {
      font-size: 3rem;
      font-weight: 900;
      color: #007d86;
      line-height: 1;
    }
    .compare-score-num small {
      font-size: 1.1rem;
      font-weight: 600;
      color: #5a7a80;
    }
    .compare-stars {
      display: flex;
      gap: 3px;
      margin-bottom: 4px;
    }
    .compare-stars span {
      color: #f5a623;
      font-size: 1.2rem;
    }
    .compare-score p {
      font-size: 0.85rem;
      color: #4e6d74;
    }
    .compare-recommend {
      display: inline-block;
      padding: 8px 22px;
      background: #007d86;
      color: #fff;
      font-weight: 700;
      border-radius: 999px;
      font-size: 0.9rem;
    }
    .compare-table-wrap {
      overflow-x: auto;
      padding: 0 0 4px;
    }
    .compare-table {
      width: 100%;
      border-collapse: collapse;
      min-width: 640px;
    }
    .compare-table th,
    .compare-table td {
      padding: 14px 20px;
      text-align: left;
      font-size: 0.9rem;
      border-bottom: 1px solid #eaf4f5;
    }
    .compare-table thead th {
      background: #f4fbfc;
      color: #0d3b42;
      font-weight: 700;
      white-space: nowrap;
    }
    .compare-table tbody td:first-child {
      font-weight: 600;
      color: #1e3a40;
    }
    .compare-table tbody td:nth-child(2) {
      color: #007d86;
      font-weight: 600;
    }
    .compare-table tbody tr:hover {
      background: #f8fdfd;
    }
    .compare-check {
      color: #00a6b0;
      font-weight: 700;
    }
    /* ===== 客户评论 ===== */
    .review-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
      gap: 22px;
    }
    .review-card {
      background: #fff;
      border-radius: 16px;
      padding: 24px 22px;
      border: 1px solid #d9edef;
      display: flex;
      flex-direction: column;
      transition: transform 0.3s, box-shadow 0.3s;
    }
    .review-card:hover {
      transform: translateY(-4px);
      box-shadow: 0 10px 28px rgba(0, 120, 130, 0.09);
    }
    .review-text {
      font-size: 0.9rem;
      color: #3c5a61;
      line-height: 1.7;
      flex: 1;
      margin-bottom: 18px;
    }
    .review-user {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .review-avatar {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: linear-gradient(135deg, #b8e6ea, #8fd4da);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: #006b73;
      font-size: 0.95rem;
      flex-shrink: 0;
    }
    .review-user-info strong {
      display: block;
      font-size: 0.88rem;
      color: #0d3b42;
    }
    .review-user-info span {
      font-size: 0.78rem;
      color: #7a959b;
    }
    /* ===== 案例展示 ===== */
    .case-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
      gap: 20px;
    }
    .case-card {
      background: #fff;
      border-radius: 16px;
      overflow: hidden;
      border: 1px solid #d9edef;
      transition: transform 0.3s, box-shadow 0.3s;
    }
    .case-card:hover {
      transform: translateY(-4px);
      box-shadow: 0 12px 30px rgba(0, 120, 130, 0.1);
    }
    .case-img-wrap {
      width: 100%;
      aspect-ratio: 16 / 10;
      overflow: hidden;
      background: #eaf6f7;
    }
    .case-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
      transition: transform 0.4s;
    }
    .case-card:hover .case-img-wrap img {
      transform: scale(1.04);
    }
    .case-info {
      padding: 16px 18px;
    }
    .case-info h3 {
      font-size: 0.95rem;
      font-weight: 700;
      color: #0d3b42;
      margin-bottom: 4px;
    }
    .case-info p {
      font-size: 0.82rem;
      color: #5a7a80;
    }
    /* ===== 表单 ===== */
    .form-wrap {
      max-width: 760px;
      margin: 0 auto;
      background: #fff;
      border-radius: 20px;
      padding: 36px 32px;
      border: 1px solid #d9edef;
      box-shadow: 0 10px 30px rgba(0, 120, 130, 0.06);
    }
    .form-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 18px;
    }
    .form-group {
      display: flex;
      flex-direction: column;
    }
    .form-group.full {
      grid-column: 1 / -1;
    }
    .form-group label {
      font-size: 0.85rem;
      font-weight: 600;
      color: #1e3a40;
      margin-bottom: 6px;
    }
    .form-group label .req {
      color: #e05a5a;
    }
    .form-group input,
    .form-group select,
    .form-group textarea {
      padding: 11px 14px;
      border: 1px solid #c8e2e5;
      border-radius: 10px;
      font-size: 0.9rem;
      color: #1a2e35;
      background: #f9fdfd;
      font-family: inherit;
      transition: border-color 0.25s, box-shadow 0.25s;
      outline: none;
    }
    .form-group input:focus,
    .form-group select:focus,
    .form-group textarea:focus {
      border-color: #00a6b0;
      box-shadow: 0 0 0 3px rgba(0, 166, 176, 0.12);
    }
    .form-group textarea {
      resize: vertical;
      min-height: 100px;
    }
    .form-submit {
      margin-top: 8px;
      text-align: center;
    }
    .form-submit button {
      padding: 13px 52px;
      background: linear-gradient(135deg, #00a6b0, #007d86);
      color: #fff;
      font-size: 1rem;
      font-weight: 700;
      border: none;
      border-radius: 999px;
      cursor: pointer;
      box-shadow: 0 6px 20px rgba(0, 140, 150, 0.3);
      transition: transform 0.25s, box-shadow 0.25s;
    }
    .form-submit button:hover {
      transform: translateY(-2px);
      box-shadow: 0 10px 28px rgba(0, 140, 150, 0.4);
    }
    /* ===== FAQ ===== */
    .faq-list {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .faq-item {
      background: #fff;
      border-radius: 12px;
      border: 1px solid #d9edef;
      overflow: hidden;
      transition: box-shadow 0.25s;
    }
    .faq-item:hover {
      box-shadow: 0 6px 18px rgba(0, 120, 130, 0.07);
    }
    .faq-question {
      width: 100%;
      background: none;
      border: none;
      padding: 18px 22px;
      text-align: left;
      font-size: 0.95rem;
      font-weight: 600;
      color: #0d3b42;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      font-family: inherit;
      transition: background 0.2s;
    }
    .faq-question:hover {
      background: #f7fdfd;
    }
    .faq-icon {
      width: 22px;
      height: 22px;
      border-radius: 50%;
      background: #e6f7f8;
      color: #008b94;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1rem;
      font-weight: 700;
      flex-shrink: 0;
      transition: transform 0.3s;
    }
    .faq-item.open .faq-icon {
      transform: rotate(45deg);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease, padding 0.3s ease;
      padding: 0 22px;
    }
    .faq-item.open .faq-answer {
      max-height: 300px;
      padding: 0 22px 20px;
    }
    .faq-answer p {
      font-size: 0.88rem;
      color: #5a7a80;
      line-height: 1.7;
    }
    /* ===== 文章列表 ===== */
    .article-list {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
      gap: 18px;
    }
    .article-card {
      background: #fff;
      border-radius: 14px;
      padding: 20px 18px;
      border: 1px solid #d9edef;
      text-decoration: none;
      display: flex;
      flex-direction: column;
      transition: transform 0.25s, box-shadow 0.25s;
    }
    .article-card:hover {
      transform: translateY(-3px);
      box-shadow: 0 8px 22px rgba(0, 120, 130, 0.09);
    }
    .article-tag {
      display: inline-block;
      font-size: 0.72rem;
      color: #008b94;
      background: #e6f7f8;
      padding: 3px 10px;
      border-radius: 999px;
      margin-bottom: 10px;
      width: fit-content;
    }
    .article-card h3 {
      font-size: 0.92rem;
      font-weight: 700;
      color: #0d3b42;
      line-height: 1.45;
      margin-bottom: 6px;
    }
    .article-card p {
      font-size: 0.8rem;
      color: #7a959b;
    }
    /* ===== 友情链接 ===== */
    .friend-links {
      display: flex;
      flex-wrap: wrap;
      gap: 10px 18px;
      padding: 28px 0 0;
      border-top: 1px solid #d9edef;
      margin-top: 36px;
    }
    .friend-links a {
      font-size: 0.82rem;
      color: #5a7a80;
      text-decoration: none;
      transition: color 0.2s;
    }
    .friend-links a:hover {
      color: #007d86;
    }
    /* ===== 页脚 ===== */
    .site-footer {
      background: #0d3b42;
      color: #cfe8ea;
      padding: 48px 0 22px;
      margin-top: 0;
    }
    .footer-container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 36px;
      margin-bottom: 36px;
    }
    .footer-brand img {
      width: 38px;
      height: 38px;
      object-fit: contain;
      margin-bottom: 12px;
      border-radius: 8px;
      background: rgba(255,255,255,0.1);
      padding: 4px;
    }
    .footer-brand h3 {
      font-size: 1.15rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 10px;
    }
    .footer-brand p {
      font-size: 0.85rem;
      color: #a3c9cd;
      line-height: 1.7;
    }
    .footer-col h4 {
      font-size: 0.92rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 14px;
    }
    .footer-col ul {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }
    .footer-col ul li a {
      font-size: 0.84rem;
      color: #a3c9cd;
      text-decoration: none;
      transition: color 0.2s;
    }
    .footer-col ul li a:hover {
      color: #7fe0e8;
    }
    .footer-contact-item {
      font-size: 0.84rem;
      color: #a3c9cd;
      margin-bottom: 8px;
      line-height: 1.6;
    }
    .footer-contact-item strong {
      color: #cfe8ea;
      font-weight: 600;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.12);
      padding-top: 20px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      flex-wrap: wrap;
    }
    .footer-bottom p {
      font-size: 0.8rem;
      color: #8fb6ba;
    }
    .footer-bottom-links {
      display: flex;
      gap: 18px;
      flex-wrap: wrap;
    }
    .footer-bottom-links a {
      font-size: 0.8rem;
      color: #8fb6ba;
      text-decoration: none;
      transition: color 0.2s;
    }
    .footer-bottom-links a:hover {
      color: #7fe0e8;
    }
    /* ===== 浮动客服 & 返回顶部 ===== */
    .float-cs {
      position: fixed;
      right: 20px;
      bottom: 100px;
      z-index: 90;
      display: flex;
      flex-direction: column;
      gap: 10px;
      align-items: center;
    }
    .float-btn {
      width: 50px;
      height: 50px;
      border-radius: 50%;
      background: linear-gradient(135deg, #00a6b0, #007d86);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      box-shadow: 0 4px 16px rgba(0, 140, 150, 0.35);
      border: none;
      transition: transform 0.25s, box-shadow 0.25s;
      text-decoration: none;
    }
    .float-btn:hover {
      transform: translateY(-3px);
      box-shadow: 0 8px 24px rgba(0, 140, 150, 0.45);
    }
    .float-btn svg {
      width: 22px;
      height: 22px;
      stroke: #fff;
    }
    .back-to-top {
      position: fixed;
      right: 20px;
      bottom: 40px;
      z-index: 90;
      width: 50px;
      height: 50px;
      border-radius: 50%;
      background: #fff;
      border: 1px solid #c8e2e5;
      color: #008b94;
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      opacity: 0;
      visibility: hidden;
      transition: opacity 0.3s, visibility 0.3s, transform 0.25s;
      box-shadow: 0 4px 16px rgba(0, 100, 110, 0.12);
    }
    .back-to-top.visible {
      opacity: 1;
      visibility: visible;
    }
    .back-to-top:hover {
      transform: translateY(-3px);
    }
    .back-to-top svg {
      width: 20px;
      height: 20px;
      stroke: #008b94;
    }
    /* ===== 客服弹层 ===== */
    .cs-popup {
      position: fixed;
      right: 80px;
      bottom: 100px;
      z-index: 95;
      background: #fff;
      border-radius: 16px;
      padding: 18px;
      box-shadow: 0 12px 40px rgba(0, 80, 90, 0.18);
      width: 200px;
      text-align: center;
      opacity: 0;
      visibility: hidden;
      transform: translateY(10px);
      transition: opacity 0.3s, visibility 0.3s, transform 0.3s;
    }
    .cs-popup.show {
      opacity: 1;
      visibility: visible;
      transform: translateY(0);
    }
    .cs-popup img {
      width: 100%;
      max-width: 160px;
      border-radius: 10px;
      display: block;
      margin: 0 auto 8px;
    }
    .cs-popup p {
      font-size: 0.8rem;
      color: #3c5a61;
      line-height: 1.5;
    }
    /* ===== 滚动渐入 ===== */
    .reveal {
      opacity: 0;
      transform: translateY(22px);
      transition: opacity 0.6s ease, transform 0.6s ease;
    }
    .reveal.visible {
      opacity: 1;
      transform: translateY(0);
    }
    /* ===== 响应式 ===== */
    @media (max-width: 980px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 68px;
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        align-items: stretch;
        padding: 12px 20px 20px;
        box-shadow: 0 12px 30px rgba(0, 100, 110, 0.1);
        border-bottom: 1px solid #d9edef;
        gap: 0;
      }
      .nav-links.open {
        display: flex;
      }
      .nav-links li a {
        padding: 12px 10px;
        border-radius: 8px;
      }
      .menu-toggle {
        display: flex;
      }
      .nav-cta {
        display: none;
      }
      .nav-container {
        position: relative;
      }
      .about-grid {
        grid-template-columns: 1fr;
        gap: 28px;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 28px;
      }
    }
    @media (max-width: 640px) {
      .hero {
        padding: 48px 0 56px;
      }
      .hero-visual {
        display: none;
      }
      .hero-stats {
        gap: 22px;
      }
      .form-grid {
        grid-template-columns: 1fr;
      }
      .form-wrap {
        padding: 26px 20px;
      }
      .footer-grid {
        grid-template-columns: 1fr;
        gap: 24px;
      }
      .compare-highlight {
        padding: 22px;
      }
      .about-features {
        grid-template-columns: 1fr;
      }
      .section {
        padding: 44px 0;
      }
      .float-cs {
        right: 14px;
        bottom: 84px;
      }
      .back-to-top {
        right: 14px;
        bottom: 24px;
      }
      .cs-popup {
        right: 14px;
        bottom: 148px;
        width: 180px;
      }
      .float-btn, .back-to-top {
        width: 44px;
        height: 44px;
      }
    }