body {
  background: #f4f6f8;
  color: #18202b;
  font-family: Arial, "Microsoft YaHei", sans-serif;
  margin: 0;
}

header {
  align-items: center;
  background: #243447;
  color: white;
  display: flex;
  justify-content: space-between;
  padding: 16px 28px;
}

header a {
  color: white;
  text-decoration: none;
}

main {
  padding: 24px;
}

table {
  background: white;
  border-collapse: collapse;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
  width: 100%;
}

th,
td {
  border-bottom: 1px solid #e0e5eb;
  padding: 12px;
  text-align: left;
}

input,
select,
textarea,
button {
  border: 1px solid #c8d1dc;
  border-radius: 6px;
  font: inherit;
  min-height: 34px;
  padding: 6px 8px;
}

textarea {
  min-width: 180px;
  resize: vertical;
}

button {
  background: #1f7a4d;
  border-color: #1f7a4d;
  color: white;
  cursor: pointer;
}