:root {
  --bg: #f4f6f9;
  --card: #fff;
  --primary: #4a90e2;
  --danger: #e74c6f;
  --text: #333;
  --muted: #888;
  --border: #e8e8e8;
  --sider: #1f2a37;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
}
a { color: var(--primary); text-decoration: none; }
.layout { display: flex; min-height: 100vh; }
.sider {
  width: 220px;
  background: var(--sider);
  color: #fff;
  flex-shrink: 0;
}
.brand {
  padding: 24px 20px;
  font-size: 18px;
  font-weight: 700;
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.nav-item {
  display: block;
  padding: 14px 20px;
  color: rgba(255,255,255,.75);
}
.nav-item:hover, .nav-item.active {
  background: rgba(255,255,255,.08);
  color: #fff;
}
.main { flex: 1; min-width: 0; }
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 28px;
  background: var(--card);
  border-bottom: 1px solid var(--border);
}
.topbar h1 { margin: 0; font-size: 18px; }
.top-actions { display: flex; gap: 16px; align-items: center; color: var(--muted); }
.content { padding: 24px 28px; }

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}
.card {
  background: var(--card);
  border-radius: 12px;
  padding: 20px;
  box-shadow: 0 2px 10px rgba(0,0,0,.04);
}
.card .label { color: var(--muted); font-size: 13px; }
.card .num { font-size: 28px; font-weight: 700; margin-top: 8px; color: var(--primary); }

.toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
  gap: 12px;
  flex-wrap: wrap;
}
.btn {
  display: inline-block;
  border: none;
  border-radius: 8px;
  padding: 8px 16px;
  cursor: pointer;
  font-size: 14px;
  background: var(--primary);
  color: #fff;
}
.btn:hover { opacity: .9; }
.btn-ghost {
  background: #eef3f9;
  color: var(--primary);
}
.btn-danger { background: var(--danger); }
.btn-sm { padding: 4px 10px; font-size: 12px; }

table {
  width: 100%;
  border-collapse: collapse;
  background: var(--card);
  border-radius: 12px;
  overflow: hidden;
}
th, td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
  text-align: left;
  vertical-align: middle;
}
th { background: #fafbfc; color: var(--muted); font-weight: 600; font-size: 13px; }
.tag {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 12px;
  background: #eef3f9;
  color: var(--primary);
}
.tag.off { background: #f5f5f5; color: #999; }

.form-card { max-width: 720px; }
.form-row { margin-bottom: 16px; }
.form-row label { display: block; margin-bottom: 6px; color: var(--muted); }
.form-row input[type=text],
.form-row input[type=password],
.form-row input[type=number],
.form-row select,
.form-row textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font: inherit;
}
.form-row textarea { min-height: 100px; resize: vertical; }
.hint { color: var(--muted); font-size: 12px; margin-top: 4px; }
.flash {
  padding: 12px 16px;
  border-radius: 8px;
  margin-bottom: 16px;
  background: #e8f8ef;
  color: #07c160;
}
.flash.error { background: #ffe8ec; color: var(--danger); }

/* login */
.login-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(160deg, #e8f1fb, #f5f5f5);
}
.login-box {
  width: 380px;
  background: #fff;
  border-radius: 16px;
  padding: 36px 32px;
  box-shadow: 0 10px 40px rgba(0,0,0,.08);
}
.login-box h1 { margin: 0 0 8px; font-size: 22px; }
.login-box p { margin: 0 0 24px; color: var(--muted); }
.login-box .btn { width: 100%; padding: 12px; margin-top: 8px; }

.item-list { display: flex; flex-direction: column; gap: 12px; }
.item-row {
  display: grid;
  grid-template-columns: 80px 1fr 1fr 100px 80px;
  gap: 8px;
  align-items: center;
  padding: 12px;
  background: #fafafa;
  border-radius: 8px;
}
.item-row img {
  width: 64px;
  height: 64px;
  object-fit: cover;
  border-radius: 8px;
  background: #eee;
}
.wxa-preview {
  display: inline-block;
  line-height: 0;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--border);
  background: #fff;
}
.wxa-preview img {
  display: block;
  width: 64px;
  height: 64px;
  object-fit: contain;
  background: #fff;
}
.preview-row {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: 10px;
}
.thumb-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  width: 76px;
  text-decoration: none;
  color: inherit;
}
.thumb-box img {
  width: 72px;
  height: 72px;
  object-fit: cover;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #fff;
  display: block;
}
.thumb-box.wxa img {
  object-fit: contain;
}
.thumb-box .thumb-fallback {
  width: 72px;
  height: 72px;
  border-radius: 8px;
  border: 1px dashed var(--border);
  background: #f7f8fa;
  color: var(--muted);
  font-size: 12px;
  align-items: center;
  justify-content: center;
}
.thumb-box .thumb-label {
  font-size: 11px;
  color: var(--muted);
  max-width: 76px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  text-align: center;
}
.thumb-box.wxa .thumb-label {
  color: var(--primary);
}
@media (max-width: 900px) {
  .sider { display: none; }
  .item-row { grid-template-columns: 1fr; }
}