/* 登记页、后台页共用样式（配色、字体与首页一致） */
@font-face{font-family:"Num";src:url(fonts/num.woff2) format("woff2");unicode-range:U+0030-0039,U+0025,U+002B,U+002C,U+002E,U+2013,U+2265,U+00D7;font-display:swap}
@font-face{font-family:"NotoSerif";src:url(fonts/notoserif.woff2) format("woff2");font-weight:400 900;font-display:swap}
@font-face{font-family:"Fraunces";src:url(fonts/fraunces.woff2) format("woff2");font-weight:100 900;font-display:swap}
@font-face{font-family:"DM Mono";src:url(fonts/dmmono.woff2) format("woff2");font-weight:500;font-display:swap}
:root{
  --paper:#f6f0e6;--tint:#eee4d3;--ink:#1f2a22;--ink-2:#5d675f;--line:rgba(31,42,34,.13);
  --green:#1d3a2b;--green-2:#28503b;--orange:#e8791a;--orange-d:#c9600c;--orange-l:#f7dcbd;--gold:#f2b43c;--cream:#fbf6ee;
  --red:#b3361b;
  --sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  --serif:"Num","Fraunces","NotoSerif","Songti SC","STSong",serif;
  --mono:"DM Mono",ui-monospace,"SF Mono",Menlo,monospace;
  --ease:cubic-bezier(.2,.8,.2,1);
}
*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%}
body{background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:16px;line-height:1.7;-webkit-font-smoothing:antialiased;min-height:100vh}
a{color:inherit;text-decoration:none}
button,input,textarea{font:inherit;color:inherit}
[data-lang="zh"] .en,[data-lang="en"] .zh{display:none!important}
.d{font-family:var(--serif);font-weight:600;font-variation-settings:"opsz" 144,"SOFT" 30;letter-spacing:-.025em}
.d .zh,.zh.d{font-family:"NotoSerif","Songti SC","STSong",serif;font-weight:900;letter-spacing:.01em}
.it{font-style:italic;font-weight:500}
.mono{font-family:var(--mono);font-weight:500;font-size:12px;letter-spacing:.12em;text-transform:uppercase}
.o{color:var(--orange)}

/* 顶栏 */
.top{display:flex;align-items:center;justify-content:space-between;padding:20px 40px;gap:16px}
.logo{display:flex;align-items:center;gap:12px}
.logo svg{width:30px;height:33px}
.logo .wm{font-family:"NotoSerif",serif;font-weight:900;font-size:21px;letter-spacing:.08em;line-height:1}
.logo .rule{width:1px;height:20px;background:currentColor;opacity:.35}
.logo .en-wm{font-family:var(--mono);font-size:11px;letter-spacing:.24em;line-height:1.25}
.logo .en-wm small{display:block;font-size:8.5px;letter-spacing:.2em;opacity:.6}
.top-r{display:flex;align-items:center;gap:18px}
.back{font-size:14px;color:var(--ink-2);display:inline-flex;align-items:center;gap:8px;transition:color .3s}
.back:hover{color:var(--orange)}
.back svg{width:13px;height:13px}
.lang{border:1px solid var(--line);border-radius:999px;padding:6px 14px;font-family:var(--mono);font-size:11.5px;background:none;cursor:pointer;transition:background .3s,color .3s}
.lang:hover{background:var(--green);color:var(--cream);border-color:var(--green)}

/* 按钮 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;padding:15px 30px;border-radius:999px;border:0;font-size:15px;letter-spacing:.04em;cursor:pointer;transition:background .35s,color .35s,opacity .3s}
.btn.solid{background:var(--green);color:var(--cream)}
.btn.solid:hover{background:var(--orange)}
.btn.line{background:none;border:1px solid var(--line);color:var(--ink)}
.btn.line:hover{border-color:var(--green)}
.btn[disabled]{opacity:.5;cursor:wait}
.btn svg{width:14px;height:14px;transition:transform .35s var(--ease)}
.btn:hover svg{transform:translateX(4px)}

/* 表单 */
.field{display:block;margin-bottom:26px}
.field>.lbl{display:flex;justify-content:space-between;align-items:baseline;font-size:14px;color:var(--ink-2);margin-bottom:8px}
.field>.lbl b{font-weight:600;color:var(--ink)}
.field>.lbl .req{color:var(--orange);margin-left:3px}
.input{width:100%;background:transparent;border:0;border-bottom:1.5px solid rgba(31,42,34,.25);padding:10px 2px;font-size:18px;outline:none;border-radius:0;transition:border-color .3s}
.input:focus{border-color:var(--orange)}
textarea.input{resize:vertical;min-height:92px;line-height:1.6;font-size:16px}
.field.bad .input{border-color:var(--red)}
.err{display:none;color:var(--red);font-size:13px;margin-top:6px}
.field.bad .err{display:block}

.chips{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:12px}
.chip{border:1px solid rgba(31,42,34,.2);background:none;border-radius:999px;padding:7px 15px;font-size:14px;cursor:pointer;transition:background .25s,color .25s,border-color .25s}
.chip:hover{border-color:var(--green)}
.chip[aria-pressed="true"]{background:var(--green);border-color:var(--green);color:var(--cream)}

.hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}

.note{font-size:13px;color:var(--ink-2);margin-top:16px}
.msg{display:none;margin-top:16px;padding:12px 16px;border-radius:10px;font-size:14px;background:#f6dfd6;color:var(--red)}
.msg.show{display:block}

@media (max-width:900px){
  .top{padding:14px 18px}
  .logo .rule,.logo .en-wm{display:none}
  .top-r{gap:12px}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}