html, body {
      font-family: 'PingFang TC', 'Microsoft JhengHei', Arial, sans-serif;
      background: #fff;
      margin: 0; padding: 0;
      color: #313131;
      font-size: 17px;
      line-height: 1.7;
    }
    .container {
      max-width: 750px;
      margin: 0 auto;
      background: #fff;
      box-sizing: border-box;
      padding: 22px 10px 50px 10px;
    }
    h1, h2, h3, h4, h5 {
      margin-top: 1.5em;
      margin-bottom: 0.5em;
      font-family: inherit;
    }
    h1 { font-size: 2.3em; color: #e67e23; font-weight: bold;}
    h2 { font-size: 1.5em; color: #fa8c41;}
    h3, h4 { font-size: 1.2em;}
    a { color: #fa8c41; text-decoration: underline;}
    img {
      max-width: 100%;
      height: auto;
      border-radius: 16px;
      display: block;
      margin: 18px auto;
    }
    .toc {
      background: #f8f8f8;
      border-radius: 22px;
      padding: 18px 18px 8px 18px;
      margin: 18px 0;
    }
    .toc li { margin-bottom: 7px; }
    .highlight {
      background: #fee8d9;
      border-radius: 18px;
      padding: 15px 16px 8px 16px;
      margin: 20px 0;
    }
    .dotted-box {
      border: 2.5px dotted #ffd23c;
      border-radius: 20px;
      padding: 12px 16px;
      margin: 20px 0;
      background: #fffdfa;
    }
    .faq-box {
      background: #f9f9f9;
      border-radius: 16px;
      padding: 14px 18px;
      margin: 24px 0;
      border-left: 4px solid #fa8c41;
    }
    .callout {
      border-radius: 16px;
      padding: 11px 15px;
      border: 1.5px solid #fa9141;
      margin: 24px 0;
      background: #fff6ee;
    }
    .main-phone {
      font-size: 1.5em;
      color: #e03e2d;
      font-weight: bold;
      letter-spacing: 1px;
      display: block;
      margin: 10px 0 6px 0;
    }
    .keyword-box {
      border: 2.5px dotted #ffd23c;
      background: #fffdfa;
      border-radius: 18px;
      padding: 13px 18px;
      margin: 36px 0 0 0;
      color: #a7871d;
      font-size: 1.07em;
      letter-spacing: 1px;
    }
    .keyword-box b {
      color: #e67e23;
      font-weight: bold;
      font-size: 1.1em;
      margin-right: 8px;
    }
    .keyword-tag {
      display: inline-block;
      background: #fee8d9;
      color: #e67e23;
      border-radius: 12px;
      padding: 2px 13px;
      font-size: 0.99em;
      margin: 2px 8px 2px 0;
      border: 1px solid #ffd23c;
    }
    .small-muted {
      color: #aaa;
      font-size: 0.97em;
    }
    @media (max-width:600px) {
      .container {padding: 10px 2vw;}
      h1 { font-size: 1.5em;}
      h2 { font-size: 1.15em;}
      .toc {padding: 12px;}
      .dotted-box, .highlight, .faq-box, .callout, .keyword-box {padding: 10px;}
      .keyword-tag {padding: 2px 8px; font-size: 0.95em;}
    }