/* ============ 喝水计算器 hw- 前缀隔离 ============ */
#hwApp{--hw-main:#2d7ff0;--hw-main2:#3aa9ff;--hw-bg:#f5faff;--hw-card:#ffffff;--hw-border:#e3ecf5;--hw-text:#2c3e50;--hw-sub:#7a8a9e;--hw-warn:#ff7a45;
font-family:"Microsoft YaHei","PingFang SC",sans-serif;color:var(--hw-text)}
#hwApp *{box-sizing:border-box}
#hwApp{background:var(--hw-bg);border-radius:14px;padding:24px}
.night #hwApp{--hw-bg:#1f2430;--hw-card:#262c3a;--hw-border:#343c4d;--hw-text:#e6e9ef;--hw-sub:#9aa5b5}

.hw-top{display:flex;gap:24px;align-items:center;flex-wrap:wrap}
.hw-avatar{flex:0 0 200px;width:200px;display:flex;justify-content:center}
.hw-form{flex:1 1 340px;min-width:280px}

.hw-form{background:var(--hw-card);border:1px solid var(--hw-border);border-radius:12px;padding:18px;box-shadow:0 4px 14px rgba(45,127,240,.06)}
.hw-field{display:flex;align-items:stretch;border:1px solid var(--hw-border);border-radius:10px;overflow:hidden;margin-bottom:12px;background:var(--hw-card)}
.hw-field label{background:var(--hw-bg);padding:12px 16px;font-size:14px;white-space:nowrap;border-right:1px solid var(--hw-border);display:flex;align-items:center;font-weight:600;color:var(--hw-text)}
.hw-field input{flex:1;border:none;outline:none;padding:12px 14px;font-size:14px;background:transparent;color:var(--hw-text)}
.hw-btn{width:100%;padding:12px;border:none;border-radius:10px;background:linear-gradient(90deg,var(--hw-main2),var(--hw-main));color:#fff;font-size:16px;font-weight:600;cursor:pointer;transition:filter .2s,transform .1s}
.hw-btn:hover{filter:brightness(1.08)}
.hw-btn:active{transform:scale(.99)}

.hw-result{display:none;}
.hw-total{background:var(--hw-card);border:1px solid var(--hw-border);border-radius:12px;padding:18px;text-align:center}
.hw-total-num{font-size:42px;font-weight:800;color:var(--hw-main);line-height:1.1}
.night .hw-total-num{color:var(--hw-main2)}
.hw-total-num span{font-size:18px;font-weight:600;margin-left:4px}
.hw-total-label{font-size:13px;color:var(--hw-sub);margin-top:6px}
.hw-total-cola{display:inline-block;margin-top:10px;background:rgba(45,127,240,.08);color:var(--hw-main);padding:4px 12px;border-radius:20px;font-size:12px}
.night .hw-total-cola{background:rgba(58,169,255,.15);color:var(--hw-main2)}

.hw-tabletitle{margin:18px 0 8px;font-size:15px;font-weight:700;padding-left:10px;border-left:4px solid var(--hw-main);color:var(--hw-text)}
.hw-table{width:100%;border-collapse:collapse;background:var(--hw-card);border:1px solid var(--hw-border);border-radius:10px;overflow:hidden;font-size:13px}
.hw-table th,.hw-table td{padding:10px 12px;text-align:left;border-bottom:1px solid var(--hw-border)}
.hw-table th{background:var(--hw-bg);font-weight:600;color:var(--hw-sub)}
.hw-table tbody tr:nth-child(odd){background:#fff3e0}
.night .hw-table tbody tr:nth-child(odd){background:rgba(255,166,77,.14)}
.hw-table tbody tr:nth-child(even){background:var(--hw-card)}
.hw-table tr:last-child td{border-bottom:none}
.hw-table td:nth-child(2){color:var(--hw-main);font-weight:600;white-space:nowrap}
.night .hw-table td:nth-child(2){color:var(--hw-main2)}

.hw-tipbox{margin-top:5px;background:#fff8ec;border:1px solid #ffd591;border-radius:12px;padding:14px 18px;color:#b4600a}
.night .hw-tipbox{background:#2e2618;border-color:#6b5432;color:#d9b382}
.hw-tipbox h4{margin:0 0 8px;font-size:15px;color:var(--hw-warn);font-weight:700}
.night .hw-tipbox h4{color:#ffa64d}
.hw-tipbox p{margin:4px 0;font-size:13px;line-height:1.7}

.hw-know{margin-top:14px;background:var(--hw-card);border:1px solid var(--hw-border);border-radius:12px;padding:14px 18px}
.hw-know h4{margin:0 0 8px;font-size:15px;color:var(--hw-main);font-weight:700}
.night .hw-know h4{color:var(--hw-main2)}
.hw-know ul{margin:0;}
.hw-know li{font-size:13px;line-height:1.9;color:var(--hw-text);margin:2px 0}

.hw-avatar{width:220px;max-width:100%}
.hw-svg{width:100%;height:auto;display:block}
.hw-water-level{transition:y .6s ease, height .6s ease}

/* 手臂+杯子：分两段独立绘制，CSS 切换显示 */
.hw-arm{transition:opacity .35s ease}
.hw-arm-drink{opacity:0}
#hwApp.hw-drinking .hw-arm-rest{opacity:0}
#hwApp.hw-drinking .hw-arm-drink{opacity:1}
.hw-dew{opacity:0}
.hw-dew circle{animation:hwdew 1.1s ease-in infinite}
.hw-dew circle:nth-child(2){animation-delay:.25s}
.hw-dew circle:nth-child(3){animation-delay:.5s}
@keyframes hwdew{
  0%{transform:translateY(0);opacity:0}
  25%{opacity:1}
  100%{transform:translateY(18px);opacity:0}
}
#hwApp.hw-drinking .hw-dew{opacity:1}
#hwApp.hw-drinking .hw-head{animation:hwbob 1.1s ease-in-out infinite}
@keyframes hwbob{
  0%,100%{transform:translateY(0)}
  50%{transform:translateY(-3px)}
}

@media (max-width:768px){
  #hwApp{padding:16px}
  .hw-top{flex-direction:column;align-items:center}
  .hw-avatar{width:140px;flex-basis:auto}
  .hw-form{width:100%;padding:18px 18px 18px;flex:none}
  .hw-field{flex-direction:column}
  .hw-field label{border-right:none;border-bottom:1px solid var(--hw-border);justify-content:center}
  .hw-tipbox{margin-top:15px}
  
}