/* Set 4 — cn: centered editorial column, forest green, paper page */
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  background: #e7dfd0;
  color: #243028;
  font-family: "Palatino Linotype", Palatino, "Songti SC", "STSong", "SimSun", serif;
  font-size: 17px;
  line-height: 1.9;
}
a { color: #1b4d3e; }
.page {
  width: min(760px, calc(100% - 28px));
  margin: 28px auto 40px;
  background: #fbf6ec;
  border: 1px solid #cbbd9f;
  box-shadow: 0 10px 0 #1b4d3e;
}
.mast {
  padding: 28px 40px 20px;
  border-bottom: 2px solid #1b4d3e;
}
.brand {
  font-family: "Times New Roman", "STKaiti", serif;
  font-size: 26px;
  color: #1b4d3e;
  display: flex;
  gap: 10px;
  align-items: center;
  font-weight: 700;
}
.brand svg { width: 28px; height: 28px; }
nav {
  margin-top: 14px;
  display: flex;
  gap: 18px;
  font-family: "Microsoft YaHei", sans-serif;
  font-size: 14px;
}
nav a { color: #1b4d3e; text-decoration: none; border-bottom: 2px solid transparent; padding-bottom: 2px; }
nav a.is-current { border-bottom-color: #c4a35a; font-weight: 700; }

.hero { padding: 28px 40px 10px; }
.hero h1 {
  font-size: 30px;
  line-height: 1.4;
  color: #1b4d3e;
  margin-bottom: 16px;
}
.hero p { margin-bottom: 12px; }
.dl-stack { display: flex; flex-direction: column; gap: 8px; margin: 18px 0 8px; }
.btn {
  font-family: "Microsoft YaHei", sans-serif;
  display: block;
  text-align: center;
  background: #1b4d3e;
  color: #fbf6ec;
  text-decoration: none;
  padding: 11px 14px;
  letter-spacing: .04em;
}
.btn:hover { background: #246652; }
.btn-alt { background: #c4a35a; color: #2a240f; }
.btn-alt:hover { background: #d4b56c; color: #2a240f; }

.chapter {
  padding: 8px 40px 18px;
  border-top: 1px solid #ddd2b6;
}
.chapter h2 {
  font-size: 22px;
  color: #1b4d3e;
  margin: 18px 0 12px;
}
.chapter p { margin-bottom: 12px; }
.chapter ul, .chapter ol { margin: 0 0 12px 1.4em; }
blockquote {
  margin: 16px 0;
  padding: 8px 0 8px 16px;
  border-left: 3px solid #c4a35a;
  color: #3d4a40;
  font-style: italic;
}
.icon-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin: 12px 0;
  font-family: "Microsoft YaHei", sans-serif;
  font-size: 15px;
}
.icon-row div {
  border: 1px solid #ddd2b6;
  padding: 12px;
}
.icon-row h3 { font-size: 16px; margin: 6px 0; color: #1b4d3e; }
.icon-row svg { width: 26px; height: 26px; color: #1b4d3e; }

table { width: 100%; border-collapse: collapse; margin: 12px 0; font-size: 15px; font-family: "Microsoft YaHei", sans-serif; }
th, td { border: 1px solid #cbbd9f; padding: 8px; text-align: left; }
th { background: #1b4d3e; color: #fbf6ec; }

.faq dt {
  font-weight: 700;
  color: #1b4d3e;
  margin-top: 14px;
  font-family: "Microsoft YaHei", sans-serif;
}
.faq dd { margin: 6px 0 0; }

.site-footer {
  padding: 18px 40px 28px;
  font-size: 12.5px;
  color: #4a534b;
  font-family: "Microsoft YaHei", sans-serif;
  background: #efe6d4;
}
.site-footer p { margin-bottom: 8px; line-height: 1.7; }

@media (max-width: 640px) {
  .mast, .hero, .chapter, .site-footer { padding-left: 20px; padding-right: 20px; }
  .icon-row { grid-template-columns: 1fr; }
  .hero h1 { font-size: 24px; }
}