/* 蓝白正色 — 适配手机优先 */
:root{
  --blue:#1677FF;
  --blue-dark:#0E5FD8;
  --blue-soft:#EAF2FF;
  --blue-line:#D6E6FF;
  --ink:#1A1A1A;
  --ink-2:#41474F;
  --sub:#6B7280;
  --bg:#F5F7FA;
  --card:#FFFFFF;
  --line:#E5E9F0;
  --warn-bg:#FFF8F0;
  --warn-line:#FAD9B3;
  --r:12px;
}

*{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent;}

html{-webkit-text-size-adjust:100%;}

body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Helvetica Neue",sans-serif;
  background:var(--bg);
  color:var(--ink);
  font-size:17px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}

.wrap{max-width:720px;margin:0 auto;padding:0 18px;}

/* ---------- Hero ---------- */
.hero{
  background:#fff;
  border-bottom:1px solid var(--line);
  padding:34px 0 28px;
}
.kicker{
  font-size:15px;color:var(--blue);font-weight:600;
  letter-spacing:.3px;margin-bottom:8px;
}
.hero h1{
  font-size:26px;line-height:1.35;font-weight:700;color:var(--ink);
  letter-spacing:-.3px;
}
.hero-line{
  margin-top:16px;font-size:19px;font-weight:700;color:var(--blue);
  line-height:1.6;
}
.hero-sub{
  margin-top:10px;font-size:15px;color:var(--sub);line-height:1.7;
}

/* ---------- Tabs ---------- */
.tabs{
  display:flex;gap:10px;margin:22px 0 6px;
}
.tab{
  flex:1;background:#fff;border:1.5px solid var(--line);border-radius:var(--r);
  padding:12px 10px;cursor:pointer;text-align:left;
  font-family:inherit;transition:all .16s ease;
}
.tab:hover{border-color:var(--blue-line);}
.tab.on{
  background:var(--blue);border-color:var(--blue);
}
.tab-name{
  display:block;font-size:17px;font-weight:700;color:var(--ink);
}
.tab-desc{
  display:block;font-size:15px;color:var(--sub);margin-top:2px;line-height:1.5;
}
.tab.on .tab-name,
.tab.on .tab-desc{color:#fff;}
.tab.on .tab-desc{opacity:.88;}

/* ---------- Panel ---------- */
.panel{display:none;padding-bottom:10px;}
.panel.on{display:block;animation:fade .28s ease;}
@keyframes fade{from{opacity:0;transform:translateY(6px);}to{opacity:1;transform:none;}}

.blk{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r);
  padding:20px 18px;
  margin-top:14px;
}
.blk h2{
  font-size:24px;line-height:1.45;font-weight:700;color:var(--ink);
  margin-bottom:12px;
  padding-left:11px;border-left:4px solid var(--blue);
  letter-spacing:-.2px;
}
.blk h3{
  font-size:20px;line-height:1.5;font-weight:700;color:var(--ink);
  margin-bottom:6px;
}
.blk p{margin:9px 0;}
.blk p:first-of-type{margin-top:0;}
.blk b{font-weight:700;color:var(--ink);}

.muted{font-size:15px;color:var(--sub);line-height:1.7;}
.hl{
  background:var(--blue-soft);
  border-left:3px solid var(--blue);
  padding:9px 12px;border-radius:0 6px 6px 0;
  margin:12px 0 !important;
}

/* ---------- Steps ---------- */
.step{
  display:flex;gap:13px;
  padding:15px 0;
  border-top:1px solid var(--line);
}
.step:first-of-type{border-top:none;padding-top:6px;}
.num{
  flex:0 0 28px;height:28px;border-radius:50%;
  background:var(--blue);color:#fff;
  font-size:15px;font-weight:700;
  display:flex;align-items:center;justify-content:center;
  margin-top:3px;
}
.step>div:last-child{flex:1;min-width:0;}

/* ---------- Tip / Warn ---------- */
.tip{
  background:var(--blue-soft);
  border:1px solid var(--blue-line);
  border-radius:10px;
  padding:14px 15px;
  margin:14px 0;
}
.tip p{margin:6px 0;font-size:17px;}
.tip p:first-child{margin-top:0;}
.tip p:last-child{margin-bottom:0;}

.warn{
  background:var(--warn-bg);
  border:1px solid var(--warn-line);
  border-radius:10px;
  padding:15px;
  margin:16px 0 4px;
}
.warn h3{font-size:19px;margin-bottom:10px;color:#B45309;}
.warn p{margin:10px 0 3px;font-size:17px;}
.warn p.muted{font-size:15px;margin-top:2px;}

/* ---------- Segments ---------- */
.seg{
  padding:16px 0;
  border-top:1px solid var(--line);
}
.seg:first-of-type{border-top:none;padding-top:4px;}

/* ---------- Copy box ---------- */
.copybox{position:relative;margin:12px 0;}
.copybox pre{
  background:#F7F9FC;
  border:1px solid var(--line);
  border-radius:8px;
  padding:14px 14px;
  font-family:"SF Mono",Consolas,"Courier New",monospace;
  font-size:15px;line-height:1.7;
  color:var(--ink-2);
  white-space:pre-wrap;word-break:break-word;
  padding-right:66px;
}
.copy-btn{
  position:absolute;top:10px;right:10px;
  background:#fff;border:1px solid var(--blue-line);
  color:var(--blue);font-size:14px;font-weight:600;
  font-family:inherit;
  padding:4px 11px;border-radius:6px;cursor:pointer;
  transition:all .15s;
}
.copy-btn:hover{background:var(--blue);color:#fff;border-color:var(--blue);}
.copy-btn.done{background:#E8F7EE;color:#0E8345;border-color:#B7E4C7;}

/* ---------- Table ---------- */
.table-wrap{overflow-x:auto;margin:12px 0;-webkit-overflow-scrolling:touch;}
table{
  width:100%;border-collapse:collapse;
  font-size:16px;min-width:100%;
}
th{
  background:var(--blue-soft);
  color:var(--ink);font-weight:700;text-align:left;
  padding:9px 10px;
  border:1px solid var(--blue-line);
  font-size:15px;
}
td{
  padding:9px 10px;
  border:1px solid var(--line);
  vertical-align:top;
  line-height:1.65;
}
tr.blank td{height:36px;}

/* ---------- End card ---------- */
.end-card{
  background:var(--blue);
  border-radius:var(--r);
  padding:24px 20px;
  margin-top:16px;
  color:#fff;
}
.end-card h2{
  font-size:24px;font-weight:700;color:#fff;
  border-left:none;padding-left:0;margin-bottom:12px;
}
.end-card p{color:rgba(255,255,255,.9);font-size:17px;margin:8px 0;}
.end-card .big{
  font-size:23px;font-weight:700;color:#fff;
  line-height:1.5;margin:14px 0;
  background:rgba(255,255,255,.14);
  padding:14px 16px;border-radius:8px;
}

/* ---------- Board ---------- */
.board-sec{
  background:#fff;
  border-top:1px solid var(--line);
  margin-top:30px;
  padding:30px 0 36px;
}
.board-title{
  font-size:24px;font-weight:700;
  padding-left:11px;border-left:4px solid var(--blue);
  margin-bottom:10px;
}

.msg-form{
  background:#F7F9FC;
  border:1px solid var(--line);
  border-radius:var(--r);
  padding:14px;
  margin:16px 0 22px;
}
.row{display:flex;gap:9px;}
.row-end{align-items:center;justify-content:space-between;margin-top:10px;}

.msg-form input,
.msg-form select,
.msg-form textarea{
  font-family:inherit;font-size:16px;
  border:1px solid var(--line);
  border-radius:8px;
  padding:10px 12px;
  background:#fff;color:var(--ink);
  outline:none;
  transition:border-color .15s;
}
.msg-form input{flex:1;min-width:0;}
.msg-form select{width:120px;flex:0 0 auto;color:var(--ink-2);}
.msg-form textarea{
  width:100%;margin-top:9px;resize:vertical;
  line-height:1.7;min-height:96px;
}
.msg-form input:focus,
.msg-form select:focus,
.msg-form textarea:focus{border-color:var(--blue);}

#msgBtn{
  background:var(--blue);color:#fff;
  border:none;border-radius:8px;
  font-family:inherit;font-size:16px;font-weight:600;
  padding:10px 26px;cursor:pointer;
  transition:background .15s;
}
#msgBtn:hover{background:var(--blue-dark);}
#msgBtn:disabled{background:#A9C8F5;cursor:not-allowed;}

.hint{font-size:15px;color:var(--sub);}
.hint.err{color:#D93025;}

.msg-list{display:flex;flex-direction:column;gap:11px;}
.msg-item{
  border:1px solid var(--line);
  border-radius:10px;
  padding:13px 14px;
  background:#fff;
}
.msg-head{
  display:flex;align-items:center;gap:8px;
  margin-bottom:6px;flex-wrap:wrap;
}
.msg-name{font-size:15px;font-weight:700;color:var(--ink);}
.msg-tag{
  font-size:13px;padding:1px 8px;border-radius:4px;
  background:var(--blue-soft);color:var(--blue);font-weight:600;
}
.msg-tag.gray{background:#F0F2F5;color:var(--sub);}
.msg-time{font-size:13px;color:#9AA1AC;margin-left:auto;}
.msg-body{
  font-size:16px;line-height:1.75;color:var(--ink-2);
  white-space:pre-wrap;word-break:break-word;
}
.loading,.empty{font-size:15px;color:var(--sub);text-align:center;padding:20px 0;}

/* ---------- Footer ---------- */
footer{
  background:#fff;border-top:1px solid var(--line);
  padding:22px 0 30px;text-align:center;
}
footer p{font-size:15px;color:var(--sub);}

/* ---------- Mobile ---------- */
@media (max-width:480px){
  body{font-size:17px;}
  .hero{padding:26px 0 22px;}
  .hero h1{font-size:23px;}
  .hero-line{font-size:18px;}
  .blk{padding:16px 14px;}
  .blk h2{font-size:21px;}
  .blk h3{font-size:18px;}
  .tabs{gap:8px;}
  .tab{padding:10px 9px;}
  .tab-name{font-size:16px;}
  .tab-desc{font-size:14px;}
  .msg-form select{width:104px;}
  table{font-size:15px;}
  .end-card .big{font-size:20px;}
}