:root{
  --bg:#f6f7f9;
  --card:#ffffff;
  --ink:#1b1f26;
  --dim:#6b7480;
  --line:#e3e6eb;
  --blue:#2f6bff;
  --blue-d:#2557d6;
  --green:#1a8f5a;
  --red:#c8382f;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:var(--font);color:var(--ink);background:var(--bg);
  font-size:15px;line-height:1.6;-webkit-font-smoothing:antialiased;
}
a{color:var(--blue);text-decoration:none}
a:hover{text-decoration:underline}
code,.mono{font-family:var(--mono)}

/* ---------- 登录 / 授权 ---------- */
.auth-wrap{
  min-height:100vh;display:flex;align-items:center;justify-content:center;
  padding:32px 16px;background:
    radial-gradient(1200px 600px at 50% -10%,#eaf0ff 0%,transparent 60%),var(--bg);
}
.card{
  width:100%;max-width:380px;background:var(--card);border:1px solid var(--line);
  border-radius:14px;padding:32px 28px 28px;
  box-shadow:0 8px 30px rgba(20,30,60,.06);
}
.brand{display:flex;align-items:center;margin-bottom:18px}
.mark{
  display:inline-flex;align-items:center;justify-content:center;
  min-width:34px;height:34px;padding:0 8px;border-radius:9px;
  background:#111820;color:#fff;font-family:var(--mono);font-size:14px;font-weight:700;
}
h1{font-size:22px;margin:0 0 6px;letter-spacing:-.2px}
.sub{margin:0 0 20px;color:var(--dim);font-size:14px}
.hint{display:block;color:var(--dim);font-size:12.5px;margin-top:6px}
label{display:block;font-size:13px;color:var(--dim);margin-bottom:14px}
input[type=text],input[type=password],input[type=email],input:not([type]),textarea,select{
  display:block;width:100%;margin-top:6px;padding:10px 12px;font-size:15px;
  color:var(--ink);background:#fbfcfd;border:1px solid var(--line);border-radius:9px;
  font-family:inherit;outline:none;transition:border-color .15s,box-shadow .15s;
}
input:focus,textarea:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(47,107,255,.12);background:#fff}
textarea{resize:vertical;font-family:var(--mono);font-size:13px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;width:100%;
  padding:11px 16px;border-radius:9px;border:1px solid transparent;
  font-size:15px;font-weight:600;font-family:inherit;cursor:pointer;transition:background .15s,border-color .15s;
}
.btn.primary{background:var(--blue);color:#fff}
.btn.primary:hover{background:var(--blue-d)}
.btn.ghost{background:transparent;border-color:var(--line);color:var(--ink)}
.btn.ghost:hover{border-color:#c9cfd8}
.btn.wechat{background:#f2fbf4;border-color:#cfe9d7;color:#146b41}
.btn.wechat:hover{background:#e8f8ed}
.btn.wechat[disabled]{opacity:.55;cursor:not-allowed}
.btn.small{width:auto;padding:7px 14px;font-size:13px}
.divider{position:relative;text-align:center;margin:18px 0;color:var(--dim);font-size:12px}
.divider:before{content:"";position:absolute;left:0;right:0;top:50%;height:1px;background:var(--line)}
.divider span{position:relative;background:var(--card);padding:0 10px}
.alert{border-radius:9px;padding:10px 12px;font-size:13.5px;margin-bottom:14px;border:1px solid}
.alert.error{background:#fdf1f0;border-color:#f3d2cf;color:var(--red)}
.alert.ok{background:#effaf3;border-color:#cfe9d7;color:#146b41}
.who{display:flex;align-items:center;gap:12px;padding:14px;border:1px solid var(--line);border-radius:10px;margin-bottom:16px;background:#fbfcfd}
.avatar{width:42px;height:42px;border-radius:50%;background:var(--blue);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:17px}
.who-name{font-weight:600}
.who-sub{color:var(--dim);font-size:12.5px;font-family:var(--mono)}
.scopes{list-style:none;padding:0;margin:0 0 20px;font-size:13.5px;color:var(--dim)}
.scopes li{padding:4px 0 4px 18px;position:relative}
.scopes li:before{content:"✓";position:absolute;left:0;color:var(--green);font-weight:700}
form .btn+.btn{margin-top:8px}

/* ---------- 管理后台 ---------- */
.admin-top{
  display:flex;align-items:center;gap:24px;padding:0 24px;height:58px;
  background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:5;
}
.admin-brand{display:flex;align-items:center;gap:9px;font-weight:700;color:var(--ink);font-size:15px}
.admin-brand .mark{min-width:26px;height:26px;font-size:11px;border-radius:7px}
.admin-top nav{display:flex;gap:4px;flex:1;flex-wrap:wrap}
.admin-top nav a{padding:7px 12px;border-radius:7px;color:var(--dim);font-size:14px}
.admin-top nav a:hover{background:#f2f4f7;text-decoration:none;color:var(--ink)}
.admin-top nav a.on{background:#eef3ff;color:var(--blue);font-weight:600}
.inline{display:inline}
.linkish{background:none;border:none;padding:0;color:var(--blue);font:inherit;font-size:13px;cursor:pointer}
.linkish:hover{text-decoration:underline}
.page{max-width:1080px;margin:0 auto;padding:28px 24px 60px}
.page h1{font-size:20px;margin:0 0 18px}
.page h2{font-size:15px;margin:30px 0 12px;color:var(--dim);font-weight:600}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.stat{background:#fff;border:1px solid var(--line);border-radius:11px;padding:16px 18px}
.stat b{display:block;font-size:26px;line-height:1.2}
.stat span{color:var(--dim);font-size:12.5px}
.tbl{width:100%;border-collapse:collapse;background:#fff;border:1px solid var(--line);border-radius:11px;overflow:hidden}
.tbl th,.tbl td{padding:10px 12px;text-align:left;font-size:13.5px;border-bottom:1px solid var(--line);vertical-align:top}
.tbl thead th{background:#fafbfc;color:var(--dim);font-weight:500;font-size:12.5px;white-space:nowrap}
.tbl tbody tr:last-child td{border-bottom:none}
.tbl tbody tr:hover{background:#fbfcfd}
.tbl .empty{text-align:center;color:var(--dim);padding:28px}
.small{font-size:12.5px}
.muted{color:var(--dim);font-size:12.5px}
.tag{display:inline-block;padding:1px 7px;border-radius:5px;background:#eef3ff;color:var(--blue);font-size:11.5px;font-family:var(--mono);white-space:nowrap}
.tag.green{background:#effaf3;color:var(--green)}
.tag.red{background:#fdf1f0;color:var(--red)}
.tag.gray{background:#f2f4f7;color:var(--dim)}
.actions{white-space:nowrap}
.actions form+form{margin-left:10px}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 18px;align-items:start}
.form-grid .wide{grid-column:1/-1}
.form-grid .btn{width:auto;min-width:150px}
.form-grid label.row{display:flex;align-items:center;gap:8px;color:var(--ink);font-size:14px;margin-top:6px}
.form-grid input[type=checkbox]{width:16px;height:16px;margin:0}
.card-inline{background:#fff;border:1px solid var(--line);border-radius:11px;padding:18px}
.searchbar{display:flex;gap:10px;margin-bottom:14px}
.searchbar input{margin:0}
@media(max-width:720px){
  .stats{grid-template-columns:1fr 1fr}
  .form-grid{grid-template-columns:1fr}
  .admin-top{height:auto;flex-wrap:wrap;padding:10px 16px;gap:10px}
  .tbl{display:block;overflow-x:auto}
}