* { margin: 0; padding: 0; box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
      background: #f0f9fa;
      color: #1a2e35;
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }
    .container {
      width: 100%;
      max-width: 1180px;
      margin: 0 auto;
      padding: 0 24px;
    }
    /* ===== 通用 ===== */
    section { padding: 72px 0; }
    .section-label {
      display: inline-block;
      font-size: 13px;
      font-weight: 600;
      letter-spacing: 2px;
      color: #0d9488;
      background: #ccfbf1;
      padding: 4px 14px;
      border-radius: 100px;
      margin-bottom: 16px;
    }
    .section-title {
      font-size: 32px;
      font-weight: 700;
      color: #0f2b33;
      line-height: 1.3;
      margin-bottom: 16px;
    }
    .section-sub {
      font-size: 16px;
      color: #4b6a75;
      max-width: 640px;
      margin-bottom: 40px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 12px 28px;
      border-radius: 10px;
      font-size: 15px;
      font-weight: 600;
      text-decoration: none;
      transition: all .25s ease;
      cursor: pointer;
      border: none;
      gap: 8px;
    }
    .btn-primary {
      background: linear-gradient(135deg, #0d9488, #14b8a6);
      color: #fff;
      box-shadow: 0 4px 14px rgba(13, 148, 136, 0.28);
    }
    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 22px rgba(13, 148, 136, 0.38);
    }
    .btn-outline {
      background: #fff;
      color: #0d9488;
      border: 1.5px solid #99f6e4;
    }
    .btn-outline:hover {
      background: #f0fdfa;
      border-color: #14b8a6;
      transform: translateY(-2px);
    }
    .grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
    .grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
    .grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
    .fade-in {
      opacity: 0;
      transform: translateY(24px);
      transition: opacity .7s ease, transform .7s ease;
    }
    .fade-in.visible { opacity: 1; transform: translateY(0); }
    /* ===== 导航 ===== */
    .site-header {
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid #ccfbf1;
      position: sticky;
      top: 0;
      z-index: 100;
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 12px 0;
      gap: 16px;
    }
    .brand { display: flex; align-items: center; gap: 10px; text-decoration: none; flex-shrink: 0; }
    .brand img { height: 38px; width: auto; display: block; }
    .brand-name { font-size: 20px; font-weight: 700; color: #0f2b33; white-space: nowrap; }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
      flex-wrap: wrap;
    }
    .nav-links li a {
      display: block;
      padding: 8px 14px;
      font-size: 14px;
      color: #334e57;
      text-decoration: none;
      border-radius: 8px;
      transition: background .2s, color .2s;
      white-space: nowrap;
    }
    .nav-links li a:hover { background: #ccfbf1; color: #0d9488; }
    .nav-cta {
      flex-shrink: 0;
      padding: 9px 20px;
      background: linear-gradient(135deg, #0d9488, #14b8a6);
      color: #fff;
      border-radius: 8px;
      font-size: 14px;
      font-weight: 600;
      text-decoration: none;
      transition: transform .2s, box-shadow .2s;
    }
    .nav-cta:hover { transform: translateY(-1px); box-shadow: 0 6px 18px rgba(13,148,136,.3); }
    .menu-toggle {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 6px;
      flex-direction: column;
      gap: 5px;
    }
    .menu-toggle span {
      display: block;
      width: 24px;
      height: 2px;
      background: #0f2b33;
      border-radius: 2px;
      transition: all .3s;
    }
    /* ===== Hero ===== */
    .hero {
      position: relative;
      overflow: hidden;
      padding: 80px 0 72px;
      background: linear-gradient(160deg, #e6fffa 0%, #f0f9fa 40%, #e0f7fa 100%);
    }
    .hero::before {
      content: '';
      position: absolute;
      top: -180px;
      right: -120px;
      width: 520px;
      height: 520px;
      background: radial-gradient(circle, rgba(20,184,166,0.16) 0%, transparent 70%);
      border-radius: 50%;
      pointer-events: none;
    }
    .hero::after {
      content: '';
      position: absolute;
      bottom: -160px;
      left: -100px;
      width: 420px;
      height: 420px;
      background: radial-gradient(circle, rgba(13,148,136,0.12) 0%, transparent 70%);
      border-radius: 50%;
      pointer-events: none;
    }
    .hero-inner { position: relative; z-index: 1; }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(255,255,255,0.85);
      border: 1px solid #99f6e4;
      padding: 6px 16px;
      border-radius: 100px;
      font-size: 13px;
      color: #0d9488;
      font-weight: 500;
      margin-bottom: 24px;
    }
    .hero-badge .dot {
      width: 7px; height: 7px; border-radius: 50%;
      background: #14b8a6;
      animation: pulse 2s infinite;
    }
    @keyframes pulse {
      0%,100% { opacity: 1; transform: scale(1); }
      50% { opacity: .5; transform: scale(1.3); }
    }
    .hero h1 {
      font-size: 42px;
      font-weight: 800;
      color: #0b2a33;
      line-height: 1.25;
      max-width: 780px;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }
    .hero h1 .accent {
      background: linear-gradient(120deg, #0d9488, #0891b2);
      -webkit-background-clip: text;
      background-clip: text;
      color: transparent;
    }
    .hero-desc {
      font-size: 17px;
      color: #3a5a64;
      max-width: 620px;
      margin-bottom: 32px;
      line-height: 1.7;
    }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 44px; }
    .hero-stats {
      display: flex;
      flex-wrap: wrap;
      gap: 14px 32px;
      padding-top: 8px;
    }
    .hero-stat-item { display: flex; flex-direction: column; }
    .hero-stat-num { font-size: 24px; font-weight: 800; color: #0d9488; }
    .hero-stat-label { font-size: 13px; color: #5b7a84; }
    /* ===== 平台介绍 ===== */
    .intro-section { background: #fff; }
    .intro-grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 40px; align-items: start; }
    .intro-text p { font-size: 15px; color: #3e5a64; margin-bottom: 16px; }
    .intro-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 20px; }
    .intro-tags span {
      display: inline-block;
      background: #f0fdfa;
      border: 1px solid #ccfbf1;
      color: #0f766e;
      font-size: 13px;
      padding: 5px 14px;
      border-radius: 100px;
    }
    .intro-cards { display: flex; flex-direction: column; gap: 16px; }
    .intro-card {
      background: #f8fefd;
      border: 1px solid #d5f5f0;
      border-radius: 14px;
      padding: 20px 22px;
      display: flex;
      gap: 16px;
      align-items: flex-start;
      transition: box-shadow .25s, transform .25s;
    }
    .intro-card:hover { box-shadow: 0 8px 24px rgba(13,148,136,.1); transform: translateY(-2px); }
    .intro-card-icon {
      width: 42px; height: 42px;
      background: linear-gradient(135deg, #ccfbf1, #99f6e4);
      border-radius: 10px;
      display: flex; align-items: center; justify-content: center;
      font-size: 20px; font-weight: 700; color: #0d9488;
      flex-shrink: 0;
    }
    .intro-card h3 { font-size: 16px; font-weight: 700; color: #0f2b33; margin-bottom: 4px; }
    .intro-card p { font-size: 13.5px; color: #5b7a84; }
    /* ===== 服务能力卡片 ===== */
    .services-section { background: linear-gradient(180deg, #f0f9fa 0%, #e6fffa 100%); }
    .service-card {
      background: #fff;
      border: 1px solid #d5f5f0;
      border-radius: 16px;
      padding: 26px 24px;
      transition: transform .3s, box-shadow .3s, border-color .3s;
    }
    .service-card:hover {
      transform: translateY(-6px);
      box-shadow: 0 14px 34px rgba(13,148,136,.13);
      border-color: #5eead4;
    }
    .service-card-icon {
      width: 48px; height: 48px;
      border-radius: 12px;
      background: linear-gradient(135deg, #ccfbf1, #99f6e4);
      display: flex; align-items: center; justify-content: center;
      font-size: 22px; margin-bottom: 16px;
    }
    .service-card h3 { font-size: 17px; font-weight: 700; color: #0f2b33; margin-bottom: 8px; }
    .service-card p { font-size: 14px; color: #55727c; line-height: 1.65; }
    /* ===== 流程步骤 ===== */
    .process-section { background: #fff; }
    .process-steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; position: relative; }
    .process-step {
      background: #f8fefd;
      border: 1px solid #d5f5f0;
      border-radius: 14px;
      padding: 26px 22px;
      position: relative;
      transition: transform .25s, box-shadow .25s;
    }
    .process-step:hover { transform: translateY(-4px); box-shadow: 0 10px 28px rgba(13,148,136,.1); }
    .process-num {
      font-size: 30px;
      font-weight: 800;
      color: #99f6e4;
      line-height: 1;
      margin-bottom: 12px;
    }
    .process-step h3 { font-size: 16px; font-weight: 700; color: #0f2b33; margin-bottom: 8px; }
    .process-step p { font-size: 13.5px; color: #5b7a84; }
    /* ===== 对比评测 ===== */
    .compare-section { background: linear-gradient(180deg, #e6fffa 0%, #f0f9fa 100%); }
    .rating-banner {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
      background: #fff;
      border: 1px solid #d5f5f0;
      border-radius: 16px;
      padding: 28px 32px;
      margin-bottom: 32px;
      box-shadow: 0 4px 18px rgba(13,148,136,.06);
    }
    .rating-score { display: flex; align-items: baseline; gap: 8px; }
    .rating-score .num { font-size: 44px; font-weight: 800; color: #0d9488; line-height: 1; }
    .rating-score .denom { font-size: 18px; color: #7a9aa4; }
    .rating-stars { font-size: 22px; color: #f59e0b; letter-spacing: 3px; }
    .rating-label { font-size: 14px; color: #4b6a75; margin-top: 4px; }
    .compare-table-wrap { overflow-x: auto; border-radius: 14px; border: 1px solid #d5f5f0; background: #fff; }
    table { width: 100%; border-collapse: collapse; min-width: 640px; }
    th, td { padding: 14px 20px; text-align: left; font-size: 14px; border-bottom: 1px solid #e6fffa; }
    th { background: #f0fdfa; color: #0f766e; font-weight: 700; font-size: 13px; letter-spacing: .5px; white-space: nowrap; }
    td { color: #3e5a64; }
    td:first-child { font-weight: 600; color: #0f2b33; white-space: nowrap; }
    tr:last-child td { border-bottom: none; }
    .check { color: #0d9488; font-weight: 700; }
    /* ===== 用户评论 ===== */
    .reviews-section { background: #fff; }
    .review-card {
      background: #f8fefd;
      border: 1px solid #d5f5f0;
      border-radius: 14px;
      padding: 24px;
      transition: transform .25s, box-shadow .25s;
    }
    .review-card:hover { transform: translateY(-4px); box-shadow: 0 10px 26px rgba(13,148,136,.1); }
    .review-text { font-size: 14px; color: #3e5a64; line-height: 1.7; margin-bottom: 18px; }
    .review-author { display: flex; align-items: center; gap: 12px; }
    .review-avatar {
      width: 40px; height: 40px;
      border-radius: 50%;
      background: linear-gradient(135deg, #99f6e4, #5eead4);
      display: flex; align-items: center; justify-content: center;
      font-size: 15px; font-weight: 700; color: #0f766e;
      flex-shrink: 0;
    }
    .review-name { font-size: 14px; font-weight: 700; color: #0f2b33; }
    .review-role { font-size: 12.5px; color: #7a9aa4; }
    /* ===== 案例展示 ===== */
    .cases-section { background: linear-gradient(180deg, #f0f9fa 0%, #e6fffa 100%); }
    .case-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
    .case-card {
      background: #fff;
      border: 1px solid #d5f5f0;
      border-radius: 16px;
      overflow: hidden;
      transition: transform .3s, box-shadow .3s;
    }
    .case-card:hover { transform: translateY(-5px); box-shadow: 0 14px 36px rgba(13,148,136,.12); }
    .case-img-wrap { width: 100%; aspect-ratio: 16 / 9; overflow: hidden; background: #e6fffa; }
    .case-img-wrap img { width: 100%; height: 100%; object-fit: contain; display: block; }
    .case-body { padding: 22px 24px; }
    .case-body h3 { font-size: 17px; font-weight: 700; color: #0f2b33; margin-bottom: 8px; }
    .case-body p { font-size: 14px; color: #55727c; line-height: 1.65; }
    .case-tag {
      display: inline-block;
      font-size: 12px;
      color: #0d9488;
      background: #ccfbf1;
      padding: 3px 12px;
      border-radius: 100px;
      margin-bottom: 10px;
      font-weight: 600;
    }
    /* ===== 文章 ===== */
    .articles-section { background: #fff; }
    .article-list { display: flex; flex-direction: column; gap: 14px; }
    .article-item {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      padding: 18px 22px;
      background: #f8fefd;
      border: 1px solid #d5f5f0;
      border-radius: 12px;
      text-decoration: none;
      transition: border-color .2s, transform .2s, box-shadow .2s;
    }
    .article-item:hover { border-color: #5eead4; transform: translateX(4px); box-shadow: 0 4px 14px rgba(13,148,136,.08); }
    .article-item-text { font-size: 15px; color: #1a3e48; font-weight: 500; }
    .article-arrow { color: #0d9488; font-size: 18px; flex-shrink: 0; }
    /* ===== 表单 ===== */
    .form-section { background: linear-gradient(180deg, #e6fffa 0%, #f0f9fa 100%); }
    .form-wrap {
      display: grid;
      grid-template-columns: 1fr 1.1fr;
      gap: 40px;
      align-items: start;
    }
    .form-info h2 { font-size: 30px; font-weight: 700; color: #0f2b33; margin-bottom: 16px; }
    .form-info p { font-size: 15px; color: #3e5a64; margin-bottom: 24px; }
    .contact-list { display: flex; flex-direction: column; gap: 14px; }
    .contact-item { display: flex; align-items: center; gap: 12px; font-size: 14px; color: #3e5a64; }
    .contact-item strong { color: #0f2b33; font-weight: 600; }
    .contact-icon {
      width: 36px; height: 36px;
      background: #ccfbf1;
      border-radius: 9px;
      display: flex; align-items: center; justify-content: center;
      font-size: 16px; flex-shrink: 0;
    }
    .contact-qr { margin-top: 22px; }
    .contact-qr img { width: 130px; height: auto; border-radius: 10px; border: 1px solid #d5f5f0; display: block; }
    .contact-qr p { font-size: 12.5px; color: #7a9aa4; margin-top: 8px; }
    .req-form {
      background: #fff;
      border: 1px solid #d5f5f0;
      border-radius: 18px;
      padding: 32px;
      box-shadow: 0 8px 30px rgba(13,148,136,.07);
    }
    .form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 16px; }
    .form-group { display: flex; flex-direction: column; gap: 6px; }
    .form-group.full { grid-column: 1 / -1; }
    .form-group label { font-size: 13px; font-weight: 600; color: #334e57; }
    .form-group input,
    .form-group select,
    .form-group textarea {
      padding: 11px 14px;
      border: 1px solid #c8e6e0;
      border-radius: 9px;
      font-size: 14px;
      color: #1a2e35;
      background: #f8fefd;
      font-family: inherit;
      transition: border-color .2s, box-shadow .2s;
      outline: none;
      width: 100%;
    }
    .form-group input:focus,
    .form-group select:focus,
    .form-group textarea:focus {
      border-color: #14b8a6;
      box-shadow: 0 0 0 3px rgba(20,184,166,.12);
      background: #fff;
    }
    .form-group textarea { resize: vertical; min-height: 96px; }
    .form-submit { width: 100%; margin-top: 6px; }
    /* ===== FAQ ===== */
    .faq-section { background: #fff; }
    .faq-list { display: flex; flex-direction: column; gap: 12px; max-width: 880px; margin: 0 auto; }
    .faq-item {
      border: 1px solid #d5f5f0;
      border-radius: 12px;
      overflow: hidden;
      background: #f8fefd;
      transition: border-color .2s;
    }
    .faq-item.open { border-color: #5eead4; }
    .faq-question {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      padding: 18px 22px;
      cursor: pointer;
      font-size: 15px;
      font-weight: 600;
      color: #0f2b33;
      user-select: none;
    }
    .faq-toggle {
      font-size: 20px;
      color: #0d9488;
      transition: transform .3s;
      flex-shrink: 0;
      line-height: 1;
    }
    .faq-item.open .faq-toggle { transform: rotate(45deg); }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height .35s ease;
    }
    .faq-answer-inner {
      padding: 0 22px 20px;
      font-size: 14px;
      color: #4b6a75;
      line-height: 1.7;
    }
    /* ===== 页脚 ===== */
    .site-footer {
      background: #0b2a33;
      color: #b0cdd4;
      padding: 52px 0 0;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr 1fr;
      gap: 36px;
      padding-bottom: 40px;
    }
    .footer-brand { display: flex; flex-direction: column; gap: 14px; }
    .footer-brand img { height: 34px; width: auto; display: block;  }
    .footer-brand p { font-size: 13.5px; color: #8db4be; line-height: 1.7; }
    .footer-col h4 { font-size: 14px; font-weight: 700; color: #fff; margin-bottom: 16px; }
    .footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 10px; }
    .footer-col ul li a { font-size: 13.5px; color: #8db4be; text-decoration: none; transition: color .2s; }
    .footer-col ul li a:hover { color: #5eead4; }
    .footer-bottom {
      border-top: 1px solid rgba(255,255,255,0.1);
      padding: 20px 0;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      font-size: 13px;
      color: #6b919c;
    }
    .footer-bottom-links { display: flex; flex-wrap: wrap; gap: 18px; }
    .footer-bottom-links a { color: #6b919c; text-decoration: none; font-size: 13px; transition: color .2s; }
    .footer-bottom-links a:hover { color: #5eead4; }
    /* ===== 浮动客服 ===== */
    .float-actions {
      position: fixed;
      right: 20px;
      bottom: 28px;
      display: flex;
      flex-direction: column;
      gap: 12px;
      z-index: 90;
    }
    .float-btn {
      width: 48px; height: 48px;
      border-radius: 50%;
      border: none;
      background: linear-gradient(135deg, #0d9488, #14b8a6);
      color: #fff;
      font-size: 20px;
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      box-shadow: 0 4px 16px rgba(13,148,136,.35);
      transition: transform .25s, box-shadow .25s;
      text-decoration: none;
    }
    .float-btn:hover { transform: translateY(-3px) scale(1.05); box-shadow: 0 8px 24px rgba(13,148,136,.45); }
    .back-top { opacity: 0; pointer-events: none; transition: opacity .3s, transform .3s; }
    .back-top.show { opacity: 1; pointer-events: auto; }
    /* ===== 响应式 ===== */
    @media (max-width: 1024px) {
      .hero h1 { font-size: 34px; }
      .grid-4 { grid-template-columns: repeat(2, 1fr); }
      .process-steps { grid-template-columns: repeat(2, 1fr); }
      .footer-grid { grid-template-columns: 1fr 1fr; }
      .intro-grid { grid-template-columns: 1fr; }
      .form-wrap { grid-template-columns: 1fr; }
    }
    @media (max-width: 860px) {
      .nav-links { display: none; position: absolute; top: 100%; left: 0; right: 0; background: #fff; flex-direction: column; align-items: stretch; padding: 12px 20px 20px; border-bottom: 1px solid #ccfbf1; box-shadow: 0 12px 24px rgba(0,0,0,.06); gap: 2px; }
      .nav-links.open { display: flex; }
      .nav-links li a { padding: 11px 14px; }
      .menu-toggle { display: flex; }
      .nav-cta { display: none; }
      .header-inner { position: relative; }
    }
    @media (max-width: 768px) {
      section { padding: 52px 0; }
      .hero { padding: 56px 0 52px; }
      .hero h1 { font-size: 28px; }
      .hero-desc { font-size: 15px; }
      .section-title { font-size: 24px; }
      .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
      .process-steps { grid-template-columns: 1fr; }
      .case-grid { grid-template-columns: 1fr; }
      .form-row { grid-template-columns: 1fr; }
      .rating-banner { flex-direction: column; align-items: flex-start; }
      .hero-stats { gap: 16px 24px; }
      .footer-grid { grid-template-columns: 1fr; gap: 28px; }
      .footer-bottom { flex-direction: column; align-items: flex-start; }
    }
    @media (max-width: 480px) {
      .container { padding: 0 16px; }
      .hero h1 { font-size: 24px; }
      .hero-actions { flex-direction: column; align-items: stretch; }
      .hero-actions .btn { width: 100%; }
      .req-form { padding: 22px; }
      .rating-score .num { font-size: 34px; }
    }