#avgCalc{width:100%;margin:0 auto;font-family:'Poppins',system-ui,-apple-system,Segoe UI,Roboto}
#avgCalc *{box-sizing:border-box}
#avgCalc input,#avgCalc select{background:#FAFAFA;border:1px solid #e5e7eb;border-radius:12px;padding:10px;width:100%}
#avgCalc input::placeholder{color:#9aa3ab;opacity:1;font-weight:400}
#avgCalc h2{color:#003366;margin:0 0 14px}
#avgCalc .card{border:1px solid #e5e7eb;border-radius:16px;background:#fafafa;padding:14px}
#avgCalc .row{display:grid;grid-template-columns:160px 1fr;gap:10px;align-items:center;margin-bottom:10px}
#avgCalc label{color:#333;font-weight:600}
#avgCalc .btn{padding:10px 16px;border-radius:50px;border:1px solid #003366;background:#003366;color:#fff;cursor:pointer;min-height:44px;display:inline-flex;align-items:center;justify-content:center}
#avgCalc .btn.outline{background:#fff;color:#003366}
#avgCalc .kline{display:flex;justify-content:space-between;align-items:center;margin:6px 0}
#avgCalc .kline span{color:#666}
#avgCalc .kline strong{color:#003366}
#avgCalc .unit{margin-left:6px;font-weight:600;color:#003366}
#gridA{display:grid;grid-template-columns:1fr 1fr 1fr;gap:16px;margin-bottom:50px}
#gridB3{display:grid;grid-template-columns:1fr 1fr 1fr;gap:16px;align-items:stretch}
@media (min-width:981px){
  #gridB3 .card{display:flex;flex-direction:column;height:100%}
  #b_orig .push-bottom{margin-top:6px}
  #b_add .push-bottom{margin-top:auto}
  #b_add #ad_preview{margin-top:0;padding-top:0;border-top:0}
}
@media (max-width:980px){
  #gridA,#gridB3{grid-template-columns:1fr}
}
@media (max-width:680px){
  #avgCalc .row{grid-template-columns:1fr;gap:6px}
  #avgCalc .row>label{margin-bottom:2px}
}
#b_orig hr,#b_res hr,#b_add hr{border:none;border-top:1px solid #e5e7eb;margin:14px 0}
#avgCalc #adBacksolveOut{color:#333;line-height:1.6;white-space:normal;word-break:break-word;overflow-wrap:anywhere}

/* 工具类，替代原来内联样式 */
#avgCalc .mt6{margin-top:6px}
#avgCalc .grid-1-120{display:grid;grid-template-columns:1fr 120px;gap:12px}