* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: #f5f6f8;
  color: #24272e;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Microsoft YaHei", Arial, sans-serif;
  line-height: 1.75;
}

a {
  color: #256fe8;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.page {
  max-width: 960px;
  margin: 0 auto;
  padding: 32px 18px 56px;
}

.hero {
  padding: 28px 30px;
  border-radius: 14px;
  background: linear-gradient(135deg, #2468f2, #35c5dd);
  color: white;
  box-shadow: 0 14px 36px rgba(26, 79, 180, 0.18);
}

.hero h1 {
  margin: 0 0 10px;
  font-size: 30px;
  line-height: 1.3;
  font-weight: 700;
}

.hero p {
  margin: 4px 0;
  color: rgba(255, 255, 255, 0.88);
}

.nav {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin: 18px 0;
}

.nav a {
  display: block;
  padding: 12px 14px;
  border-radius: 10px;
  background: white;
  color: #2b3445;
  font-size: 15px;
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.06);
}

.card {
  margin-top: 16px;
  padding: 26px 30px;
  border-radius: 14px;
  background: white;
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.06);
}

h2 {
  margin: 8px 0 14px;
  padding-top: 4px;
  font-size: 22px;
  line-height: 1.4;
  color: #1f2329;
}

h3 {
  margin: 22px 0 8px;
  font-size: 18px;
  color: #2b3038;
}

p,
li {
  font-size: 16px;
}

ul,
ol {
  padding-left: 1.3em;
}

.meta {
  color: #5f6b7a;
  font-size: 14px;
}

.notice {
  padding: 12px 14px;
  border-radius: 10px;
  background: #eef6ff;
  color: #285d9b;
}

.table-wrap {
  overflow-x: auto;
  margin: 12px 0 4px;
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 760px;
  font-size: 15px;
}

th,
td {
  padding: 12px 14px;
  border: 1px solid #e2e7ef;
  vertical-align: top;
  text-align: left;
}

th {
  background: #f3f6fa;
  color: #1f2937;
  font-weight: 650;
}

.tag {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  background: #eaf2ff;
  color: #256fe8;
  font-size: 13px;
  white-space: nowrap;
}

.tag.required {
  background: #fff2e8;
  color: #d46b08;
}

.footer {
  margin-top: 22px;
  color: #778293;
  font-size: 14px;
  text-align: center;
}

@media (max-width: 720px) {
  .page {
    padding: 18px 12px 42px;
  }

  .hero,
  .card {
    padding: 22px 18px;
    border-radius: 12px;
  }

  .hero h1 {
    font-size: 24px;
  }

  .nav {
    grid-template-columns: 1fr 1fr;
  }

  h2 {
    font-size: 20px;
  }
}