:root{
  --bg:#f6f8f7;
  --card:#ffffff;
  --ink:#1c2b28;
  --ink-2:#5a6b67;
  --ink-3:#8b9a96;
  --line:#e3e9e6;
  --brand:#0f8a6a;
  --brand-soft:#e6f4ef;
  --warn:#8a6d0f;
  --warn-soft:#fdf6e3;
  --radius:14px;
  --shadow:0 1px 2px rgba(16,40,34,.04), 0 8px 24px rgba(16,40,34,.06);
}

*{box-sizing:border-box}

body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:15px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}

.wrap{max-width:840px;margin:0 auto;padding:0 20px}

/* ---------------------------------------------------------------- 头部 */
.hero{
  background:linear-gradient(160deg,#0f8a6a 0%,#0b6b53 100%);
  color:#fff;
  padding:40px 0 34px;
}
.hero h1{
  margin:0;
  font-size:30px;
  letter-spacing:.16em;
  font-weight:600;
}
.hero .sub{margin:6px 0 0;opacity:.9;font-size:14px}
.hero .tech{margin:16px 0 0;display:flex;flex-wrap:wrap;gap:8px}
.hero .tech span{
  font-size:12px;
  padding:3px 10px;
  border-radius:100px;
  background:rgba(255,255,255,.15);
  border:1px solid rgba(255,255,255,.22);
}

/* ---------------------------------------------------------------- 免责声明 */
.disclaimer{
  margin:18px auto 0;
  background:var(--warn-soft);
  border:1px solid #f0e2b8;
  color:var(--warn);
  border-radius:10px;
  padding:10px 14px;
  font-size:13px;
  line-height:1.6;
}

/* ---------------------------------------------------------------- 提问框 */
.ask{
  display:flex;
  gap:10px;
  margin:22px 0 12px;
}
.ask input{
  flex:1;
  padding:13px 16px;
  font-size:15px;
  font-family:inherit;
  color:var(--ink);
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:var(--card);
  outline:none;
  transition:border-color .15s, box-shadow .15s;
}
.ask input:focus{
  border-color:var(--brand);
  box-shadow:0 0 0 3px var(--brand-soft);
}
.ask button{
  padding:0 26px;
  font-size:15px;
  font-family:inherit;
  font-weight:500;
  color:#fff;
  background:var(--brand);
  border:none;
  border-radius:var(--radius);
  cursor:pointer;
  transition:background .15s;
}
.ask button:hover:not(:disabled){background:#0c7358}
.ask button:disabled{opacity:.5;cursor:not-allowed}

.examples{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  margin-bottom:22px;
}
.examples .label{font-size:13px;color:var(--ink-3)}
.chip{
  font-family:inherit;
  font-size:13px;
  color:var(--ink-2);
  background:var(--card);
  border:1px solid var(--line);
  border-radius:100px;
  padding:5px 13px;
  cursor:pointer;
  transition:all .15s;
}
.chip:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-soft)}

/* ---------------------------------------------------------------- 卡片 */
.card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  margin-bottom:16px;
  overflow:hidden;
}
.card-head{
  display:flex;
  align-items:center;
  gap:9px;
  padding:14px 18px;
  border-bottom:1px solid var(--line);
}
.card-head h2{
  margin:0;
  font-size:14px;
  font-weight:600;
  letter-spacing:.04em;
  color:var(--ink);
}
.card-head .dot{
  width:7px;height:7px;border-radius:50%;
  background:var(--brand);
}
.card-head .dot.alt{background:#3d7ebf}
.card-head .dot.dim{background:var(--ink-3)}
.card-head .timer{
  margin-left:auto;
  font-size:12px;
  color:var(--ink-3);
  font-variant-numeric:tabular-nums;
}
.card-head.collapsible{cursor:pointer;user-select:none}
.card-head .chev{margin-left:8px;color:var(--ink-3);transition:transform .2s;font-size:12px}
.card-head.collapsed .chev{transform:rotate(-90deg)}
.card.collapsed .trace{display:none}

/* ---------------------------------------------------------------- 回答 */
.answer-body{
  padding:18px;
  white-space:pre-wrap;
  word-break:break-word;
}
.answer-body p{margin:0 0 10px}
.answer-body strong{font-weight:600}
.answer-body .cursor{
  display:inline-block;
  width:7px;height:16px;
  background:var(--brand);
  vertical-align:-2px;
  animation:blink 1s steps(1) infinite;
}
@keyframes blink{50%{opacity:0}}

/* [1] 引用角标 */
.cite{
  display:inline-block;
  min-width:16px;
  padding:0 4px;
  margin:0 1px;
  font-size:11px;
  line-height:16px;
  text-align:center;
  color:var(--brand);
  background:var(--brand-soft);
  border-radius:4px;
  cursor:pointer;
  vertical-align:2px;
  font-variant-numeric:tabular-nums;
}
.cite:hover{background:#cfeade}

.refused{
  margin:0 18px 18px;
  padding:9px 13px;
  font-size:12.5px;
  color:var(--ink-3);
  background:#f3f6f5;
  border-left:3px solid var(--ink-3);
  border-radius:0 6px 6px 0;
}

/* ---------------------------------------------------------------- 来源 */
.sources{padding:14px}
.src{
  padding:13px 14px;
  border:1px solid var(--line);
  border-radius:10px;
  margin-bottom:10px;
  transition:border-color .2s, background .2s;
}
.src:last-child{margin-bottom:0}
.src.flash{border-color:var(--brand);background:var(--brand-soft)}
.src-head{
  display:flex;
  align-items:baseline;
  gap:8px;
  margin-bottom:6px;
}
.src-n{
  flex:none;
  font-size:11px;
  font-weight:600;
  color:#fff;
  background:var(--brand);
  border-radius:4px;
  padding:1px 6px;
}
.src-title{font-weight:600;font-size:13.5px}
.src-sec{font-size:12px;color:var(--ink-3)}
.src-score{
  margin-left:auto;
  flex:none;
  font-size:11.5px;
  color:var(--ink-3);
  font-variant-numeric:tabular-nums;
}
.src-text{
  font-size:13px;
  color:var(--ink-2);
  line-height:1.7;
  display:-webkit-box;
  -webkit-line-clamp:3;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.src.expanded .src-text{-webkit-line-clamp:unset}
.src-more{
  font-size:12px;
  color:var(--brand);
  cursor:pointer;
  margin-top:4px;
  display:inline-block;
}
.src a{color:var(--brand);text-decoration:none;font-size:12px}
.src a:hover{text-decoration:underline}

/* ---------------------------------------------------------------- 检索过程 */
.trace{padding:14px 18px;font-size:12.5px}
.trace table{width:100%;border-collapse:collapse}
.trace th{
  text-align:left;
  font-weight:500;
  color:var(--ink-3);
  font-size:11.5px;
  padding-bottom:6px;
  border-bottom:1px solid var(--line);
}
.trace td{
  padding:5px 0;
  border-bottom:1px solid #f0f4f2;
  color:var(--ink-2);
}
.trace td.num{font-variant-numeric:tabular-nums;text-align:right;padding-right:10px}
.trace .hit{color:var(--brand);font-weight:600}
.trace .miss{color:#c9d3d0}

/* ---------------------------------------------------------------- 其他 */
.hidden{display:none !important}

.error{
  padding:12px 16px;
  background:#fdeaea;
  border:1px solid #f3c9c9;
  border-radius:10px;
  color:#9b2c2c;
  font-size:13.5px;
  margin-bottom:16px;
}

footer{padding:10px 20px 40px}
.stats{
  display:flex;
  flex-wrap:wrap;
  gap:18px;
  padding:14px 0;
  border-top:1px solid var(--line);
  margin-top:10px;
}
.stats div{font-size:12px;color:var(--ink-3)}
.stats b{
  display:block;
  font-size:17px;
  color:var(--ink);
  font-weight:600;
  font-variant-numeric:tabular-nums;
}
.foot{
  font-size:12px;
  color:var(--ink-3);
  margin:8px 0 0;
}
.foot a{color:var(--ink-2)}

@media (max-width:600px){
  .hero{padding:30px 0 26px}
  .hero h1{font-size:24px}
  .ask{flex-direction:column}
  .ask button{padding:12px}
  .src-score{display:none}
}