:root{
  --bg:#f4f6fb; --card:#fff; --ink:#1f2733; --muted:#6b7686;
  --brand:#2f6fed; --brand-dark:#1f54c0; --line:#e6e9f0;
  --ok:#15803d; --ok-bg:#e7f6ec; --err:#b91c1c; --err-bg:#fdecec;
  --chip:#eef2fb; --radius:12px;
}
*{box-sizing:border-box}
body{margin:0;font-family:"PingFang SC","Microsoft YaHei",system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  background:var(--bg);color:var(--ink);line-height:1.6}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
.container{max-width:1040px;margin:0 auto;padding:0 16px}

header.topbar{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:10}
.topbar .inner{display:flex;align-items:center;gap:18px;height:58px}
.brand{font-weight:700;font-size:18px;color:var(--ink)}
.brand:hover{text-decoration:none}
nav.main{display:flex;gap:4px;flex-wrap:wrap;flex:1}
nav.main a{padding:6px 12px;border-radius:8px;color:var(--muted);font-size:15px}
nav.main a:hover{background:var(--chip);text-decoration:none}
nav.main a.active{color:var(--brand);background:var(--chip);font-weight:600}
.userbox{display:flex;align-items:center;gap:10px;font-size:14px;color:var(--muted)}
.userbox form{margin:0}

main{padding:24px 0 64px}
h1{font-size:24px;margin:0 0 4px}
.sub{color:var(--muted);margin:0 0 22px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px;margin-bottom:18px}

.grid{display:grid;gap:16px}
.grid.cols-3{grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}
.grid.cols-2{grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}

.tile{display:block;background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:22px;transition:.15s;color:inherit}
.tile:hover{text-decoration:none;border-color:var(--brand);box-shadow:0 6px 20px rgba(47,111,237,.10);transform:translateY(-1px)}
.tile .ico{font-size:30px}
.tile h3{margin:10px 0 4px;font-size:18px}
.tile p{margin:0;color:var(--muted);font-size:14px}
.tile .count{font-size:13px;color:var(--brand);margin-top:8px;font-weight:600}

.chips{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:16px}
.chip{padding:5px 12px;border-radius:20px;background:var(--chip);color:var(--muted);font-size:14px;border:1px solid transparent}
.chip:hover{text-decoration:none}
.chip.active{background:var(--brand);color:#fff}
.filterbar{display:flex;gap:18px;flex-wrap:wrap;margin-bottom:6px}
.filterbar .label{font-size:13px;color:var(--muted);margin-right:4px}

table{width:100%;border-collapse:collapse;background:#fff}
th,td{padding:11px 12px;border-bottom:1px solid var(--line);text-align:left;font-size:14px;vertical-align:middle}
th{color:var(--muted);font-weight:600;background:#fafbfe}
tr:last-child td{border-bottom:none}

.tag{display:inline-block;padding:1px 9px;border-radius:6px;background:var(--chip);color:var(--brand);font-size:12px;font-weight:600}
.tag.grade{background:#eaf7ef;color:var(--ok)}
.badge-ok{color:var(--ok);font-weight:600}
.badge-open{color:#b45309;font-weight:600}

.btn{display:inline-block;padding:9px 16px;border-radius:9px;border:1px solid var(--brand);
  background:var(--brand);color:#fff;font-size:14px;cursor:pointer;font-family:inherit}
.btn:hover{background:var(--brand-dark);text-decoration:none}
.btn.ghost{background:#fff;color:var(--brand)}
.btn.ghost:hover{background:var(--chip)}
.btn.danger{background:#fff;color:var(--err);border-color:#f0c5c5}
.btn.danger:hover{background:var(--err-bg)}
.btn.sm{padding:5px 11px;font-size:13px}
.actions{display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.actions form{margin:0}

form.stack{display:flex;flex-direction:column;gap:14px;max-width:680px}
label.field{display:flex;flex-direction:column;gap:6px;font-size:14px;font-weight:600}
label.field .hint{font-weight:400;color:var(--muted);font-size:12px}
input[type=text],input[type=password],input[type=number],input[type=file],select,textarea{
  padding:10px 12px;border:1px solid var(--line);border-radius:9px;font-size:14px;font-family:inherit;background:#fff;width:100%}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(47,111,237,.12)}
textarea{min-height:90px;resize:vertical}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
@media(max-width:520px){.row2{grid-template-columns:1fr}}

.flash{padding:11px 14px;border-radius:9px;margin-bottom:14px;font-size:14px}
.flash.ok{background:var(--ok-bg);color:var(--ok)}
.flash.error{background:var(--err-bg);color:var(--err)}

.empty{text-align:center;color:var(--muted);padding:48px 20px}
.empty .ico{font-size:42px;opacity:.5}

.login-wrap{max-width:380px;margin:8vh auto 0}
.login-wrap .card{padding:30px}
.login-title{text-align:center;margin-bottom:6px}
.viewer{width:100%;height:78vh;border:1px solid var(--line);border-radius:var(--radius);background:#fff}
.muted{color:var(--muted)}
.kv{display:grid;grid-template-columns:120px 1fr;gap:8px 16px;margin:0}
.kv dt{color:var(--muted);font-size:14px}
.kv dd{margin:0}
.backlink{margin-bottom:14px;display:inline-block}
.pill-row{display:flex;justify-content:space-between;align-items:flex-start;gap:12px;flex-wrap:wrap}