/* 暖紙 style: warm beige paper, rounded cards, terracotta buttons */
:root{
  color-scheme:light;
  --bg:#f3eee6;--ink:#2a241e;--muted:#7a6e62;--card:#fffdf9;--line:#e4d9cc;
  --accent:#8d4e2c;--accent-ink:#fff8f3;--accent-soft:#f6e4d4;
  --ok:#4d7c3a;--ok-soft:#e6efd9;--bad:#b4462f;--bad-soft:#f7e0d8;
  --font:"PingFang HK","PingFang TC","Hiragino Sans CNS","Noto Sans CJK TC","Noto Sans TC","Microsoft JhengHei","Heiti TC",sans-serif;
}
*{box-sizing:border-box}
html,body{margin:0;min-height:100%}
body{font-family:var(--font);background:radial-gradient(720px 360px at 12% -10%,#f6e4d4 0%,transparent 60%),var(--bg);color:var(--ink);min-height:100vh;line-height:1.5;font-size:16px}
button,input{font:inherit}
button{cursor:pointer}
:focus-visible{outline:3px solid var(--accent);outline-offset:3px}
.stage{min-height:100vh;display:grid;place-items:center;padding:32px 20px}
.panel{width:min(420px,100%);background:var(--card);border:1px solid var(--line);border-radius:22px;box-shadow:0 16px 40px rgba(70,48,28,.08);padding:36px 32px 28px}
.panel[hidden]{display:none}
.kicker{margin:0 0 8px;font-size:13px;color:var(--accent);letter-spacing:.12em}
h1{margin:0 0 24px;font-size:30px;font-weight:650;letter-spacing:.02em}
h1.sm{font-size:24px;margin-bottom:8px}
.lead{margin:0 0 20px;color:var(--muted);font-size:14px}
.actions{display:grid;gap:12px}
.btn{min-height:52px;border-radius:14px;border:1.5px solid var(--accent);background:transparent;color:var(--accent);font-size:18px;width:100%;padding:0 16px}
.btn.pri{background:var(--accent);color:var(--accent-ink)}
.btn.quiet{border-color:var(--line);color:var(--ink)}
.btn:disabled{opacity:.55;cursor:default}
.fld{margin:0 0 14px}
.fld label{display:block;font-size:14px;font-weight:600;margin-bottom:6px}
.fld input{width:100%;min-height:48px;padding:10px 14px;border:1.5px solid var(--line);border-radius:12px;background:#fff;color:var(--ink);font-size:16px}
.fld input:focus{outline:none;border-color:var(--accent)}
.hint{font-size:13px;color:var(--muted);margin-top:4px}
.msg{min-height:22px;font-size:14px;margin:4px 0 12px}
.msg.err{color:var(--bad)}
.msg.ok{color:var(--ok)}
.links{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-top:16px;font-size:14px}
.lnk{border:0;background:none;color:var(--accent);padding:0;font-size:14px;text-decoration:underline;text-underline-offset:3px}
.notice{background:var(--accent-soft);border-radius:16px;padding:18px;margin:0 0 20px}
.notice b{display:block;font-size:22px;margin-bottom:6px}
.notice p{margin:4px 0;font-size:14px;color:var(--ink)}
.foot{margin-top:22px;font-size:12px;color:var(--muted);text-align:center}
@media (max-width:420px){.panel{padding:28px 20px 22px;border-radius:18px}h1{font-size:26px}}