:root{
  --blue:#2563eb; --blue-dark:#1d4ed8; --blue-soft:#eff6ff;
  --bg:#f6f7f9; --card:#ffffff; --line:#e5e7eb;
  --text:#1f2328; --muted:#57606a; --danger:#dc2626; --ok:#16a34a; --warn:#d97706;
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  font-size:14px;line-height:1.6}
a{color:var(--blue);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:1080px;margin:0 auto;padding:0 16px}

.topbar{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
.bar{display:flex;align-items:center;gap:16px;height:54px;flex-wrap:wrap}
.brand{font-weight:600;font-size:17px;color:var(--text)}
.nav{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin-left:auto}
.nav a{color:var(--muted)}
.nav a:hover{color:var(--blue)}
.nav a.on{color:var(--blue);font-weight:600}
.admin-link{color:var(--danger)!important}
.credits{background:var(--blue-soft);color:var(--blue-dark);border-radius:999px;padding:2px 10px;font-size:12px}
.inline{display:inline;margin:0}
.linkbtn{background:none;border:none;color:var(--muted);cursor:pointer;font-size:14px;padding:0;font-family:inherit}
.linkbtn:hover{color:var(--blue)}

main{display:block;padding:20px 0 40px}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:20px;margin-bottom:16px}
.card h2{margin:0 0 14px;font-size:16px;font-weight:600}
.card h3{margin:18px 0 8px;font-size:14px;font-weight:600;color:var(--muted)}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:12px}
.stat{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:16px}
.stat .n{font-size:24px;font-weight:600;color:var(--blue)}
.stat .l{color:var(--muted);font-size:12px}

label{display:block;margin:10px 0 4px;font-size:13px;color:var(--muted)}
input[type=text],input[type=password],input[type=email],input[type=number],select,textarea{
  width:100%;padding:9px 11px;border:1px solid var(--line);border-radius:8px;font-size:14px;
  background:#fff;color:var(--text);font-family:inherit}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--blue)}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:flex-end}
.row>div{flex:1;min-width:150px}

.btn{display:inline-block;background:var(--blue);color:#fff;border:none;border-radius:8px;
  padding:9px 18px;font-size:14px;cursor:pointer;font-family:inherit}
.btn:hover{background:var(--blue-dark);text-decoration:none}
.btn.ghost{background:#fff;color:var(--text);border:1px solid var(--line)}
.btn.small{padding:5px 12px;font-size:13px}
.btn.danger{background:var(--danger)}
.btn:disabled{background:#9ca3af;cursor:not-allowed}

table{width:100%;border-collapse:collapse;font-size:13px}
th,td{padding:8px 10px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
th{color:var(--muted);font-weight:500;background:#fafbfc}
tr:hover td{background:#fcfcfd}

.alert{padding:10px 14px;border-radius:8px;margin-bottom:14px;font-size:13px}
.alert.err{background:#fef2f2;color:var(--danger);border:1px solid #fecaca}
.alert.ok{background:#f0fdf4;color:var(--ok);border:1px solid #bbf7d0}
.alert.warn{background:#fffbeb;color:var(--warn);border:1px solid #fde68a}

.muted{color:var(--muted)}
.small{font-size:12px}
.mono{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
.badge{display:inline-block;padding:1px 8px;border-radius:999px;font-size:12px;background:#f3f4f6;color:var(--muted)}
.badge.ok{background:#f0fdf4;color:var(--ok)}
.badge.err{background:#fef2f2;color:var(--danger)}
.badge.warn{background:#fffbeb;color:var(--warn)}
.badge.blue{background:var(--blue-soft);color:var(--blue-dark)}

.authbox{max-width:400px;margin:48px auto}
.cap{display:flex;gap:8px;align-items:center}
.cap img{height:44px;border:1px solid var(--line);border-radius:8px;background:#fff}

.mailbody{border:1px solid var(--line);border-radius:8px;padding:16px;background:#fff;overflow:auto}
.mailbody img{max-width:100%}
.list{list-style:none;padding:0;margin:0}
.list li{padding:10px 0;border-bottom:1px solid var(--line)}

.foot{border-top:1px solid var(--line);background:#fff;padding:16px 0;color:var(--muted);font-size:12px}
.ad{margin:16px 0;padding:12px;background:#fff;border:1px dashed var(--line);border-radius:8px;text-align:center}
.notice{white-space:pre-wrap;background:var(--blue-soft);border:1px solid #bfdbfe;color:var(--blue-dark);
  padding:12px;border-radius:8px;font-size:13px;margin-bottom:14px}
pre{white-space:pre-wrap;word-break:break-all}
@media (max-width:640px){
  .bar{height:auto;padding:10px 0}
  .nav{gap:12px;font-size:14px}
  .card{padding:14px}
  table{font-size:12px}
  th,td{padding:6px}
  /* iOS Safari 聚焦输入框时字号 <16px 会自动放大页面，这里固定 16px */
  input[type=text],input[type=password],input[type=email],input[type=number],select,textarea{font-size:16px}
  .btn{font-size:16px}
  .row>div{min-width:120px}
  .wrap{padding:0 12px}
}

/* ---- 邮箱地址两排卡片 ---- */
.mblist{display:flex;flex-direction:column;gap:10px}
.mbitem{border:1px solid var(--line);border-radius:10px;padding:12px 14px;background:#fff}
.mbtop{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.mbaddr{font-size:15px;word-break:break-all}
.mbops{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap;margin-top:8px}
.mbact{display:flex;gap:8px;align-items:center}
.inline{display:inline}

/* ---- 证明照片弹窗 ---- */
#proof_modal{position:fixed;inset:0;background:rgba(15,23,42,.55);z-index:100;
  display:flex;align-items:center;justify-content:center;padding:16px}
.proof-box{background:#fff;border-radius:12px;max-width:720px;width:100%;max-height:88vh;
  overflow:auto;padding:16px;box-shadow:0 12px 40px rgba(0,0,0,.25)}
.proof-head{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:10px}
#proof_img{width:100%;height:auto;border-radius:8px;border:1px solid var(--line);
  -webkit-touch-callout:default}

/* 收件箱里每封邮件的「查看邮件」蓝色文字入口 */
.maillink{color:var(--blue);font-weight:600}
.maillink:hover{color:var(--blue-dark);text-decoration:underline}