* {
  box-sizing: border-box;
}
html,
body {
  max-width: 100%;
  overflow-x: clip;
}
body {
  margin: 0;
  background: #d9e2ef;
  color: #24324a;
  font:
    15px/1.8 Arial,
    "PingFang SC",
    sans-serif;
}
a {
  color: #174c9a;
  text-decoration: none;
}
.top {
  background: linear-gradient(#fff, #dfe8f5);
  border-bottom: 1px solid #8091aa;
  padding: 14px 3vw;
  display: flex;
  align-items: center;
  gap: 20px;
}
.logo {
  font: bold 2rem Arial;
  color: #174c9a;
  margin-right: auto;
}
.nav {
  background: #285b9b;
  padding: 10px 3vw;
  display: flex;
  gap: 22px;
  flex-wrap: wrap;
}
.nav a {
  color: #fff;
}
.article {
  width: min(920px, 94vw);
  margin: 24px auto;
  background: #fff;
  border: 1px solid #8091aa;
}
.article-head {
  background: #e9f0f8;
  border-bottom: 1px solid #8091aa;
  padding: 22px 28px;
}
.tag {
  font-weight: 800;
  color: #b42332;
}
.article h1 {
  font-size: clamp(1.6rem, 3vw, 2.25rem);
  line-height: 1.22;
  margin: 0.35em 0;
}
.lead {
  font-size: 1.05rem;
  color: #536276;
}
.article-body {
  padding: 10px 28px 28px;
}
.article-body h2 {
  font-size: 1.16rem;
  color: #172b4d;
  margin: 1.45em 0 0.35em;
}
.article-body p {
  margin: 0.9em 0;
}
.article-date {
  border-top: 1px solid #c6d1df;
  margin-top: 26px;
  padding-top: 12px;
  color: #536276;
  font-size: 0.88rem;
}
footer {
  text-align: center;
  padding: 24px;
}
.wave20-index {
  margin-top: 28px;
  padding-top: 22px;
  border-top: 1px solid currentColor;
  line-height: 1.8;
}
.wave20-index h2 {
  font-size: 1.25rem;
}
@media (max-width: 700px) {
  .top {
    padding: 11px 14px;
  }
  .top span {
    display: none;
  }
  .logo {
    font-size: 1.45rem;
  }
  .nav {
    padding: 8px 12px;
    gap: 13px;
  }
  .nav a:nth-child(n + 4) {
    display: none;
  }
  .article {
    margin: 16px auto;
  }
  .article-head,
  .article-body {
    padding: 16px;
  }
  .article h1 {
    font-size: 1.45rem;
  }
}