:root {
  --bg: #f5f6f8; --panel: #ffffff; --ink: #1c2130; --muted: #6b7280;
  --line: #e4e7ec; --brand: #2f6feb; --brand-ink: #ffffff;
  --ok: #16794c; --warn: #a35b00; --danger: #b42318;
  --ok-bg: #e7f5ee; --warn-bg: #fdf3e3; --danger-bg: #fdecea; --info-bg: #eaf1fe;
  --radius: 8px;
}
* { box-sizing: border-box; }
body { margin: 0; font: 14px/1.6 -apple-system, "Segoe UI", "Noto Sans CJK SC",
       "Microsoft YaHei", sans-serif; background: var(--bg); color: var(--ink); }
a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }

/* 布局 */
.layout { display: flex; min-height: 100vh; }
.sidebar { width: 208px; flex: none; background: #1e2433; color: #c9d1e0;
           display: flex; flex-direction: column; }
.sidebar .brand { padding: 18px 20px; font-size: 16px; font-weight: 600; color: #fff;
                  border-bottom: 1px solid #2c344a; }
.sidebar .brand small { display: block; font-size: 11px; font-weight: 400;
                        color: #7c869c; margin-top: 2px; }
.sidebar nav { padding: 10px 0; flex: 1; }
.sidebar nav a { display: block; padding: 9px 20px; color: #c9d1e0; font-size: 14px; }
.sidebar nav a:hover { background: #2a3145; text-decoration: none; color: #fff; }
.sidebar nav a.on { background: var(--brand); color: #fff; }
.sidebar .foot { padding: 14px 20px; border-top: 1px solid #2c344a; font-size: 12px;
                 color: #8b94a8; }
.sidebar .foot a { color: #c9d1e0; }
.main { flex: 1; min-width: 0; display: flex; flex-direction: column; }
.topbar { background: var(--panel); border-bottom: 1px solid var(--line);
          padding: 12px 24px; display: flex; align-items: center; gap: 12px; }
.topbar h1 { font-size: 17px; margin: 0; font-weight: 600; }
.topbar .spacer { flex: 1; }
.content { padding: 20px 24px 48px; }

/* 卡片与表格 */
.card { background: var(--panel); border: 1px solid var(--line);
        border-radius: var(--radius); margin-bottom: 18px; }
.card > h2 { font-size: 14px; margin: 0; padding: 12px 16px; border-bottom: 1px solid var(--line);
             font-weight: 600; display: flex; align-items: center; gap: 10px; }
.card > h2 .spacer { flex: 1; }
.card .body { padding: 16px; }
.tablewrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
th, td { padding: 9px 12px; text-align: left; border-bottom: 1px solid var(--line);
         white-space: nowrap; }
th { background: #fafbfc; font-weight: 600; color: var(--muted); font-size: 12.5px; }
tbody tr:hover { background: #f8f9fb; }
td.wrap, th.wrap { white-space: normal; min-width: 200px; }
.empty { padding: 32px; text-align: center; color: var(--muted); }

/* 统计块 */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
         gap: 12px; margin-bottom: 18px; }
.stat { background: var(--panel); border: 1px solid var(--line);
        border-radius: var(--radius); padding: 14px 16px; }
.stat .n { font-size: 26px; font-weight: 600; line-height: 1.2; }
.stat .l { color: var(--muted); font-size: 12.5px; margin-top: 2px; }

/* 表单 */
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 14px; }
label { display: block; font-size: 12.5px; color: var(--muted); margin-bottom: 4px; }
label .req { color: var(--danger); }
input[type=text], input[type=password], input[type=date], input[type=number],
input[type=email], input[type=file], select, textarea {
  width: 100%; padding: 7px 9px; border: 1px solid #cfd4dc; border-radius: 6px;
  font: inherit; background: #fff; color: var(--ink);
}
input:focus, select:focus, textarea:focus { outline: 2px solid #bcd0f7; border-color: var(--brand); }
textarea { min-height: 76px; resize: vertical; }
.actions { margin-top: 16px; display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }

.btn { display: inline-block; padding: 7px 14px; border-radius: 6px; border: 1px solid #cfd4dc;
       background: #fff; color: var(--ink); font: inherit; cursor: pointer; }
.btn:hover { background: #f2f4f7; text-decoration: none; }
.btn.primary { background: var(--brand); border-color: var(--brand); color: var(--brand-ink); }
.btn.primary:hover { background: #2559c4; }
.btn.danger { color: var(--danger); border-color: #f0c2bd; }
.btn.danger:hover { background: var(--danger-bg); }
.btn.sm { padding: 4px 9px; font-size: 12.5px; }

/* 过滤条 */
.filters { display: flex; gap: 8px; flex-wrap: wrap; align-items: flex-end; }
.filters .f { min-width: 130px; }
.filters .f.wide { min-width: 220px; }

/* 徽章与提示 */
.badge { display: inline-block; padding: 1px 8px; border-radius: 20px; font-size: 12px;
         border: 1px solid transparent; }
.badge.ok { background: var(--ok-bg); color: var(--ok); }
.badge.warn { background: var(--warn-bg); color: var(--warn); }
.badge.off { background: #eef0f3; color: var(--muted); }
.badge.info { background: var(--info-bg); color: var(--brand); }
.grade { font-weight: 600; }
.grade.A { color: var(--ok); } .grade.B { color: var(--brand); }
.grade.C { color: var(--warn); } .grade.D { color: var(--danger); }

.flash { padding: 10px 14px; border-radius: var(--radius); margin-bottom: 16px; font-size: 13.5px; }
.flash.ok { background: var(--ok-bg); color: var(--ok); border: 1px solid #b8e0cb; }
.flash.err { background: var(--danger-bg); color: var(--danger); border: 1px solid #f3c3bd; }
.hint { color: var(--muted); font-size: 12.5px; }
.mono { font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace; font-size: 12.5px; }

.bar { height: 7px; background: #eef0f3; border-radius: 4px; overflow: hidden; min-width: 90px; }
.bar > i { display: block; height: 100%; background: var(--brand); }

.pager { display: flex; gap: 6px; align-items: center; padding: 12px 16px; }

/* 登录页 */
.loginwrap { min-height: 100vh; display: flex; align-items: center; justify-content: center;
             background: linear-gradient(160deg, #1e2433, #2f3d5c); padding: 20px; }
.loginbox { background: #fff; border-radius: 10px; padding: 30px 28px; width: 100%;
            max-width: 350px; box-shadow: 0 10px 40px rgba(0,0,0,.25); }
.loginbox h1 { font-size: 19px; margin: 0 0 4px; }
.loginbox p.sub { margin: 0 0 20px; color: var(--muted); font-size: 13px; }
.loginbox .field { margin-bottom: 14px; }

.dl { display: grid; grid-template-columns: 96px 1fr; gap: 8px 14px; font-size: 13.5px; }
.dl dt { color: var(--muted); }
.dl dd { margin: 0; }

@media (max-width: 720px) {
  .layout { flex-direction: column; }
  .sidebar { width: 100%; }
  .sidebar nav { display: flex; flex-wrap: wrap; padding: 6px; }
  .sidebar nav a { padding: 7px 12px; border-radius: 6px; }
  .sidebar .foot { display: none; }
  .content { padding: 14px; }
}