* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, "Microsoft YaHei", sans-serif;
  background: #f5f7fb;
  color: #172033;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 24px 34px;
  background: #18253f;
  color: #fff;
}

h1 {
  margin: 0;
  font-size: 26px;
}

header p {
  margin: 6px 0 0;
  color: #c8d3e0;
}

nav {
  display: flex;
  gap: 10px;
}

nav a {
  color: #fff;
  text-decoration: none;
  background: rgba(255,255,255,0.12);
  padding: 8px 12px;
  border-radius: 6px;
}

main {
  padding: 28px 34px 48px;
}

.stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(140px, 1fr));
  gap: 14px;
  margin-bottom: 24px;
}

.stats div,
section {
  background: #fff;
  border: 1px solid #dce3ec;
  border-radius: 8px;
}

.stats div {
  padding: 18px;
}

.stats span {
  display: block;
  color: #667085;
  font-size: 13px;
  margin-bottom: 8px;
}

.stats strong {
  font-size: 26px;
}

section {
  overflow: auto;
}

.empty {
  padding-bottom: 18px;
}

.empty p {
  margin: 12px 18px;
  color: #475467;
}

code {
  background: #eef2f7;
  padding: 2px 6px;
  border-radius: 4px;
}

h2 {
  margin: 0;
  padding: 16px 18px;
  font-size: 18px;
  border-bottom: 1px solid #dce3ec;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

th,
td {
  padding: 12px 14px;
  border-bottom: 1px solid #edf1f5;
  text-align: left;
  vertical-align: top;
}

th {
  background: #f8fafc;
  color: #475467;
}