* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; font-family: Arial, "Microsoft YaHei", sans-serif; color: #172033; background: #f4f6f8; }
aside { position: fixed; inset: 0 auto 0 0; width: 220px; background: #172033; color: #fff; padding: 22px 14px; }
.brand { font-size: 20px; font-weight: 700; padding: 0 10px 18px; }
nav { display: grid; gap: 6px; }
nav a { color: #dbe4f0; text-decoration: none; padding: 10px 12px; border-radius: 6px; }
nav a:hover { background: #26344d; color: #fff; }
main { margin-left: 220px; padding: 28px; }
main.center { margin: 0; min-height: 100vh; display: grid; place-items: center; }
h1 { margin: 0 0 20px; font-size: 26px; }
h2 { margin: 0 0 14px; font-size: 18px; }
p { color: #5a6577; line-height: 1.6; }
code { display: inline-block; vertical-align: middle; color: #0d4b83; background: #eaf3ff; border-radius: 4px; padding: 2px 6px; white-space: normal; word-break: break-all; }
.cards { display: grid; grid-template-columns: repeat(4, minmax(140px, 1fr)); gap: 14px; margin-bottom: 18px; }
.card, .panel, .login-panel { background: #fff; border: 1px solid #dfe5ec; border-radius: 8px; box-shadow: 0 8px 24px rgba(20, 32, 51, .06); }
.card { padding: 18px; }
.card span { display: block; color: #69778b; margin-bottom: 12px; }
.card strong { font-size: 32px; }
.panel { padding: 18px; margin-bottom: 18px; }
.login-panel { width: min(420px, calc(100vw - 32px)); padding: 28px; }
.alert { padding: 10px 12px; border-radius: 6px; margin-bottom: 14px; }
.alert.error { background: #fff0f0; color: #a31717; border: 1px solid #f1b7b7; }
.form, .grid-form { display: grid; gap: 12px; }
.grid-form { grid-template-columns: repeat(2, minmax(0, 1fr)); align-items: end; }
.narrow { max-width: 420px; }
label { display: grid; gap: 6px; color: #344154; font-size: 14px; }
label.wide { grid-column: 1 / -1; }
label.check { display: flex; align-items: center; gap: 8px; min-height: 42px; }
input, select, textarea { width: 100%; border: 1px solid #cdd6e1; border-radius: 6px; padding: 10px 11px; font: inherit; background: #fff; }
textarea { min-height: 86px; resize: vertical; }
button { border: 0; border-radius: 6px; padding: 10px 16px; background: #1267b3; color: #fff; font-weight: 700; cursor: pointer; }
button:hover { background: #0d5698; }
button.ghost { background: #eef3f8; color: #223047; }
.table-panel { overflow-x: auto; padding: 0; }
table { width: 100%; border-collapse: collapse; min-width: 880px; }
th, td { padding: 11px 12px; border-bottom: 1px solid #e7ecf2; text-align: left; vertical-align: top; font-size: 14px; }
th { background: #f9fbfd; color: #4d5a6c; font-weight: 700; }
td { color: #263247; }
td form { margin: 0; }
@media (max-width: 860px) {
  aside { position: static; width: auto; }
  nav { grid-template-columns: repeat(3, 1fr); }
  main { margin-left: 0; padding: 18px; }
  .cards, .grid-form { grid-template-columns: 1fr; }
}