:root{
  --paper:#faf7f2; --ink:#1c1a17; --ink-2:#5c574f; --ink-3:#8a847a;
  --coral:#d97757; --coral-deep:#b85c3e; --ok:#3d7a4a; --warn:#a8452e;
  --card:#ffffff; --line:#e5dfd5; --line-strong:#c9c2b4;
  --mono:ui-monospace,'SF Mono','JetBrains Mono',Menlo,Consolas,monospace;
  --sans:-apple-system,'PingFang SC','HarmonyOS Sans SC','MiSans',
        'Microsoft YaHei UI','Microsoft YaHei',sans-serif;
}
@media (prefers-color-scheme:dark){
  :root{
    --paper:#171512; --ink:#ece7de; --ink-2:#a8a196; --ink-3:#736d62;
    --coral:#e08a6a; --coral-deep:#eda183; --ok:#7db386; --warn:#e0836a;
    --card:#211e1a; --line:#332f28; --line-strong:#4a4438;
  }
}
*{margin:0;padding:0;box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  font-family:var(--sans);background:var(--paper);color:var(--ink);
  line-height:1.7;font-size:16px;
  background-image:radial-gradient(var(--line) .5px,transparent .5px);
  background-size:24px 24px;
}
.wrap{max-width:640px;margin:0 auto;padding:20px 16px 64px}
.wrap.wide{max-width:1000px}
@media(min-width:900px){.wrap.wide{padding:24px 32px 72px}}
a{color:var(--coral-deep)}
.brand{
  display:flex;align-items:baseline;gap:8px;padding:12px 0 20px;
  border-bottom:2px solid var(--ink);margin-bottom:24px;
}
.brand a.home{
  display:flex;align-items:baseline;gap:8px;flex:1;min-width:0;
  color:inherit;text-decoration:none;
}
.brand b{font-size:19px;letter-spacing:.05em;white-space:nowrap}
.brand span{font-family:var(--mono);font-size:12px;color:var(--ink-3);
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
@media (max-width:520px){.brand span{display:none}}
.brand a.go{
  font-size:13.5px;font-weight:600;color:var(--coral-deep);
  text-decoration:none;white-space:nowrap;align-self:center;
}
.brand-actions{display:flex;align-items:center;gap:14px;flex-shrink:0}

.brand details.dd{position:relative;align-self:center}
.brand details.dd summary{list-style:none;cursor:pointer;display:inline-flex;align-items:center;gap:4px;user-select:none}
.brand details.dd summary::-webkit-details-marker{display:none}
.brand details.dd .caret{width:0;height:0;border-left:4px solid transparent;border-right:4px solid transparent;border-top:5px solid currentColor;margin-top:1px;transition:transform .15s}
.brand details.dd[open] .caret{transform:rotate(180deg)}
.brand .dd-menu{
  position:absolute;top:calc(100% + 8px);left:50%;transform:translateX(-50%);z-index:30;
  min-width:124px;padding:6px;background:var(--card);border:1px solid var(--line-strong);
  border-radius:10px;box-shadow:0 8px 24px rgba(0,0,0,.12);
}
.brand .dd-menu a{
  display:block;padding:9px 14px;border-radius:7px;font-size:13.5px;font-weight:600;
  color:var(--ink);text-decoration:none;white-space:nowrap;
}
.brand .dd-menu a:hover{background:var(--paper);color:var(--coral-deep)}
.brand details.dd:not([open]) .dd-menu{display:none}
@media (hover:hover){.brand details.dd:hover .dd-menu{display:block}}
.brand details.dd-right .dd-menu{left:auto;right:0;transform:none}
@media (max-width:580px){.brand .dd-menu{left:0;transform:none}.brand details.dd-right .dd-menu{left:auto;right:0}}

@media (max-width:580px){.brand{flex-wrap:wrap;row-gap:4px}.brand-actions{flex:1 1 100%;min-width:0;gap:9px;flex-wrap:wrap;justify-content:flex-start}.brand a.go{font-size:12.5px}}
@media (max-width:400px){.brand-actions{gap:7px}.brand a.go{font-size:12px}}
.brand a.acct{
  display:inline-flex;align-items:center;gap:6px;font-family:var(--mono);
  font-size:12.5px;max-width:190px;overflow:hidden;text-overflow:ellipsis;
}
.brand a.acct .udot{
  width:7px;height:7px;border-radius:50%;background:var(--ok);flex:0 0 auto;
}
@media (max-width:520px){.brand a.acct{max-width:120px}}
.card{
  background:var(--card);border:1px solid var(--line);border-radius:10px;
  padding:22px 18px;margin:14px 0;
  box-shadow:0 1px 0 var(--line);
}
.card.accent{border-top:3px solid var(--coral)}
h1{font-size:26px;line-height:1.35;letter-spacing:.01em}
h2{font-size:19px;margin-bottom:10px}
h3{font-size:16px;margin:14px 0 6px}
p{margin:8px 0;color:var(--ink-2)}
p.strong,li.strong{color:var(--ink)}
.mono,code{font-family:var(--mono);font-size:.92em}
.kbd{
  font-family:var(--mono);font-size:13px;background:var(--paper);
  border:1px solid var(--line-strong);border-radius:5px;padding:2px 7px;
  white-space:nowrap;
}
.btn{
  display:block;width:100%;padding:14px;border:none;border-radius:8px;
  background:var(--ink);color:var(--paper);font-size:16px;font-weight:600;
  font-family:var(--sans);cursor:pointer;margin-top:14px;min-height:48px;
}
.btn:active{transform:translateY(1px)}
.btn.coral{background:var(--coral)}
.btn.ghost{background:transparent;color:var(--ink-2);border:1px dashed var(--line-strong)}
.btn:disabled{opacity:.45;cursor:wait}
label{display:block;font-size:14px;font-weight:600;margin:14px 0 5px}
label small{font-weight:400;color:var(--ink-3)}
input[type=text],input[type=email]{
  width:100%;padding:12px;font-size:16px;font-family:var(--mono);
  border:1px solid var(--line-strong);border-radius:8px;
  background:var(--paper);color:var(--ink);min-height:48px;
}
input:focus{outline:2px solid var(--coral);border-color:transparent}
.steps{
  display:flex;gap:6px;align-items:center;font-family:var(--mono);
  font-size:12.5px;color:var(--ink-3);margin-bottom:18px;
}
.steps i{flex:1;border-bottom:1px dashed var(--line-strong);font-style:normal}

@media(max-width:520px){.steps{gap:3px;font-size:11px;overflow-x:auto}.steps i{min-width:4px}}
.steps .st{display:flex;align-items:center;gap:5px;white-space:nowrap}
.steps .st em{
  font-style:normal;display:inline-flex;align-items:center;justify-content:center;
  width:20px;height:20px;border-radius:50%;font-size:11px;font-weight:700;
  border:1.5px solid var(--line-strong);color:var(--ink-3);
}
.steps .st.cur{color:var(--coral-deep);font-weight:700}
.steps .st.cur em{background:var(--coral);border-color:var(--coral);color:#fff}
.steps .st.done{color:var(--ink-2)}
.steps .st.go{cursor:pointer}
.steps .st.go:hover{color:var(--coral-deep);text-decoration:underline dotted}
.steps .st.done em{
  background:var(--ok);border-color:var(--ok);color:#fff;
}
.receipt{
  font-family:var(--mono);border:1.5px dashed var(--line-strong);
  border-radius:8px;padding:16px;margin:14px 0;text-align:center;
  background:var(--paper);
}
.receipt .addr{
  font-size:19px;font-weight:700;word-break:break-all;color:var(--ink);
  letter-spacing:.02em;
}
.receipt .hint{font-size:12px;color:var(--ink-3);margin-top:6px}
.mailcard{
  border-left:3px solid var(--coral);background:var(--paper);
  padding:10px 14px;margin:12px 0;border-radius:0 8px 8px 0;
  font-size:14px;
}
.mailcard .from{font-family:var(--mono);font-size:12.5px;color:var(--ink-2);word-break:break-all}
.mailcard .subj{font-weight:700;margin-top:2px}
.warnbox{
  border:2px solid var(--warn);border-radius:8px;padding:12px 14px;
  margin:14px 0;color:var(--warn);font-weight:700;
}
.okline{color:var(--ok);font-weight:700}
.err{color:var(--warn);font-size:14px;margin-top:10px;min-height:1.4em}
.spin{
  display:inline-block;width:14px;height:14px;border:2px solid var(--line-strong);
  border-top-color:var(--coral);border-radius:50%;vertical-align:-2px;
  animation:sp .8s linear infinite;margin-right:6px;
}
@keyframes sp{to{transform:rotate(360deg)}}
.fade{animation:fd .45s ease both}
@keyframes fd{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
.tbl-wrap{overflow-x:auto;margin:10px -18px;padding:0 18px}
table.tbl{width:100%;border-collapse:collapse;font-size:13.5px;min-width:320px}
table.tbl th{font-family:var(--mono);font-size:11.5px;color:var(--ink-3);
  text-align:left;padding:8px 8px;border-bottom:1.5px solid var(--line-strong)}
table.tbl td{padding:9px 8px;border-bottom:1px solid var(--line);vertical-align:top}
.muted{color:var(--ink-3);font-size:12.5px}
.btn[aria-disabled="true"]{opacity:.4;pointer-events:none}
.selfcheck{display:grid;gap:6px;margin:8px 0}
.ck{display:flex;gap:9px;align-items:center;font-weight:400;font-size:15px;margin:0;
  border:1px solid var(--line);border-radius:8px;padding:10px 12px;cursor:pointer;
  background:var(--card)}
.ck input{width:18px;height:18px;accent-color:var(--coral);flex-shrink:0}
.ck:has(input:checked){border-color:var(--coral)}
.flow{margin:10px 0}
.flow-node{
  border:1.5px solid var(--line-strong);border-radius:10px;
  padding:10px 14px;background:var(--paper);
}
.flow-node.hot{border-color:var(--coral)}
.flow-who{font-weight:700;font-size:14.5px}
.flow-desc{font-size:12.5px;color:var(--ink-2);word-break:break-all}
.flow-arrow{
  text-align:center;color:var(--coral);font-weight:700;font-size:16px;
  line-height:1.4;
}
.guide-img{
  width:100%;max-width:560px;display:block;border:1px solid var(--line-strong);
  border-radius:10px;margin:6px 0 14px;background:#fff;
}
.hide-input{position:absolute;width:1px;height:1px;opacity:0;overflow:hidden}
.filebtn{
  display:block;text-align:center;border:1.5px dashed var(--line-strong);
  border-radius:8px;padding:14px 12px;cursor:pointer;font-size:14.5px;
  color:var(--ink-2);font-weight:400;margin:8px 0;
}
.filebtn.hasfiles{border-color:var(--ok);color:var(--ok);border-style:solid}
.filebtn.dragover{border-color:var(--coral);color:var(--coral-deep);background:var(--card)}
.foot{
  margin-top:40px;padding-top:14px;border-top:1px solid var(--line);
  font-size:12.5px;color:var(--ink-3);font-family:var(--mono);
}
ol.guide{padding-left:20px;margin:8px 0}
ol.guide li{margin:7px 0;color:var(--ink-2)}
.hide{display:none}