* {
  box-sizing: border-box;
}
body {
  margin: 0;
  background: #e8ece8;
  color: #16231f;
  font:
    16px/1.8 Arial,
    "PingFang SC",
    sans-serif;
}
a {
  color: #0d6553;
}
.mast {
  background: #16231f;
  color: #fff;
  padding: 24px 4vw;
}
.mast a {
  color: #c9f7df;
  margin-right: 18px;
}
.mast b a {
  color: inherit;
  text-decoration: none;
}
.case-article {
  width: min(840px, 92vw);
  margin: 38px auto;
  background: #fff;
  border: 1px solid #899b91;
  padding: clamp(22px, 5vw, 54px);
}
.case-label {
  font: 700 12px monospace;
  letter-spacing: 0.16em;
  color: #0d6553;
}
.case-article h1 {
  font-size: clamp(1.65rem, 3vw, 2.35rem);
  line-height: 1.2;
  margin: 0.45em 0;
}
.lead {
  font-size: 1.08rem;
  color: #40534c;
}
.case-article article {
  border-top: 1px solid #b8c4bd;
  margin-top: 24px;
  padding-top: 12px;
}
.case-article h2 {
  font-size: 1.15rem;
  margin: 1.5em 0 0.4em;
}
.case-article article p {
  margin: 0.9em 0;
}
.article-date {
  margin-top: 30px;
  padding-top: 12px;
  border-top: 1px solid #899b91;
  font: 700 0.82rem monospace;
  color: #0d6553;
}
footer {
  padding: 30px 4vw;
}
.wave20-index {
  margin-top: 28px;
  padding-top: 22px;
  border-top: 1px solid currentColor;
  line-height: 1.8;
}
@media (max-width: 760px) {
  .mast {
    padding: 15px 16px;
  }
  .mast nav {
    margin-top: 8px;
  }
  .case-article {
    margin: 18px auto;
    padding: 20px 16px;
  }
  .case-article h1 {
    font-size: 1.5rem;
  }
  .lead {
    font-size: 1rem;
  }
}