*{margin:0;padding:0;box-sizing:border-box;}
  body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Microsoft YaHei",sans-serif;background-color:#f4f6f9;color:#333;min-height:100vh;display:flex;flex-direction:column;}
  .header-bar{background:linear-gradient(135deg,#007AAE 0%,#005f87 100%);color:#fff;padding:16px 20px;box-shadow:0 2px 10px rgba(0,0,0,.1);position:sticky;top:0;z-index:100;}
  .header-bar .inner{max-width:760px;margin:0 auto;display:flex;align-items:center;gap:12px;}
  .header-bar .inner img{height:44px;width:44px;border-radius:8px;background:#fff;padding:4px;object-fit:contain;}
  .header-bar .info h1{font-size:20px;font-weight:500;letter-spacing:1px;line-height:1.2;}
  .header-bar .info .sub{font-size:12px;opacity:.8;letter-spacing:1px;margin-top:2px;}
  .main-container{flex:1;width:100%;max-width:800px;margin:40px auto;padding:0 20px;position:relative;}
  .card{background:#fff;border-radius:12px;box-shadow:0 4px 20px rgba(0,0,0,.05);padding:40px;}
  .form-title{text-align:center;color:#007AAE;font-size:18px;font-weight:bold;margin-bottom:25px;}
  .input-group{margin-bottom:20px;}
  .input-group label{display:block;font-size:14px;color:#666;margin-bottom:6px;}
  .input-group label em{color:#e54d42;font-style:normal;margin-right:2px;}
  .input-group input,.input-group select{width:100%;padding:13px 16px;font-size:15px;border:2px solid #e1e5ee;border-radius:8px;outline:none;background:#fff;color:#333;transition:border-color .3s;appearance:none;-webkit-appearance:none;}
  .input-group input:focus,.input-group select:focus{border-color:#007AAE;}
  .input-group select{background-image:linear-gradient(45deg,transparent 50%,#999 50%),linear-gradient(135deg,#999 50%,transparent 50%);background-position:calc(100% - 20px) 50%,calc(100% - 15px) 50%;background-size:5px 5px;background-repeat:no-repeat;padding-right:35px;}
  .btn-submit{width:100%;padding:15px;background-color:#007AAE;color:#fff;border:none;border-radius:8px;font-size:18px;cursor:pointer;transition:background .3s;margin-top:8px;}
  .btn-submit:hover{background-color:#005f87;}
  .footer-tips{margin-top:30px;font-size:13px;color:#999;line-height:1.8;background:rgba(255,255,255,.5);padding:15px;border-radius:8px;}
  .footer-tips strong{color:#666;}
  .captcha-line{display:flex;align-items:center;gap:10px;}
  .captcha-line input{flex:1;min-width:0;}
  .captcha-line img{height:48px;width:110px;border:2px solid #e1e5ee;border-radius:8px;cursor:pointer;flex:none;}
  .pca-row{display:flex;gap:6px;}
  /* layui 渲染下拉时隐藏原生 select，需让可见的 layui-form-select 均分占满 */
  .pca-row .layui-form-select{flex:1;min-width:0;}
  /* layui-input-block 类仅用于 pca.js 联动定位，覆盖 layui 表单的左侧留白 */
  .pca-row.layui-input-block{margin-left:0;min-height:auto;}
  @media(max-width:600px){
    .main-container{margin:20px auto;padding:0 15px;}
    .card{padding:25px 20px;}
    .header-bar h1{font-size:20px;}
  }