:root {
  --bg: #f4f6f9; --card: #fff; --line: #e6eaf0;
  --txt: #243041; --sub: #7a8699;
  --in: #e0342b; --out: #1f9d55;      /* 收入红 支出绿 */
  --brand: #2f6fed;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg); color: var(--txt); font-size: 15px;
}
.wrap { max-width: 960px; margin: 0 auto; padding: 16px; }
header.top {
  background: linear-gradient(135deg, #2f6fed, #5a8bff);
  color: #fff; padding: 22px 0 46px;
}
header.top .wrap { display: flex; justify-content: space-between; align-items: center; }
header.top h1 { font-size: 20px; font-weight: 600; }
header.top a { color: rgba(255,255,255,.85); font-size: 13px; text-decoration: none; }

.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: -34px; }
.card {
  background: var(--card); border-radius: 12px; padding: 14px 16px;
  box-shadow: 0 2px 10px rgba(20,40,80,.06);
}
.card .label { color: var(--sub); font-size: 12px; }
.card .num { font-size: 22px; font-weight: 700; margin-top: 4px; }

section { margin-top: 18px; }
h2 { font-size: 15px; margin-bottom: 10px; color: var(--txt); }
.card.table-card { padding: 0; overflow: hidden; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { padding: 10px 14px; text-align: left; border-bottom: 1px solid var(--line); }
th { background: #f8fafc; color: var(--sub); font-weight: 500; font-size: 13px; white-space: nowrap; }
tr:last-child td { border-bottom: none; }
.amt-in { color: var(--in); font-weight: 600; }
.amt-out { color: var(--out); font-weight: 600; }
.tag {
  display: inline-block; font-size: 12px; padding: 1px 8px; border-radius: 10px;
  background: #eef3fe; color: var(--brand);
}
.muted { color: var(--sub); font-size: 13px; }

/* 后台表单 */
.form-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 10px; }
.field { display: flex; flex-direction: column; gap: 4px; }
.field label { font-size: 12px; color: var(--sub); }
.field input, .field select, .field textarea {
  border: 1px solid var(--line); border-radius: 8px; padding: 8px 10px; font-size: 14px;
  background: #fff; color: var(--txt);
}
.btn {
  border: none; border-radius: 8px; padding: 9px 18px; font-size: 14px; cursor: pointer;
  background: var(--brand); color: #fff;
}
.btn.red { background: var(--in); }
.btn.gray { background: #eef1f6; color: var(--sub); }
.btn.sm { padding: 4px 10px; font-size: 12px; border-radius: 6px; }
.toolbar { display: flex; gap: 8px; align-items: center; margin: 12px 0; flex-wrap: wrap; }
.login-box { max-width: 340px; margin: 12vh auto; background: #fff; border-radius: 14px; padding: 28px; box-shadow: 0 4px 20px rgba(20,40,80,.08); }
.login-box h1 { font-size: 18px; text-align: center; margin-bottom: 18px; }
.login-box .field { margin-bottom: 12px; }
.login-box .btn { width: 100%; }
.flash { background: #fff7e8; border: 1px solid #ffe1a8; color: #9a6b00; border-radius: 8px; padding: 9px 12px; margin-bottom: 12px; font-size: 13px; }

@media (max-width: 640px) {
  .cards { grid-template-columns: repeat(3, 1fr); gap: 8px; }
  .card .num { font-size: 17px; }
  th, td { padding: 8px 8px; }
  .hide-sm { display: none; }
}