html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: #fafaf9;
  color: #292524;
  font-family: Georgia, "Songti SC", "SimSun", serif;
  line-height: 1.7;
}

.chrome {
  background: #fafaf9;
  border-bottom: 1px solid #a8a29e;
}
.chrome-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 18px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}
.wordmark {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #44403c;
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 0.02em;
}
.menu { display: flex; gap: 28px; }
.menu a {
  color: #44403c;
  text-decoration: none;
  font-size: 14px;
}
.menu a:hover { color: #000; border-bottom: 1px solid #a8a29e; }

.shell { max-width: 1080px; margin: 0 auto; padding: 0 24px 48px; }

.billboard {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 36px;
  padding: 48px 0 36px;
  align-items: start;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}
.billboard h1 {
  font-family: Georgia, "Songti SC", "SimSun", serif;
  font-size: 36px;
  line-height: 1.35;
  font-weight: 600;
  margin: 0 0 16px;
  color: #1c1917;
}
.billboard p { margin: 0 0 12px; color: #44403c; }
.use {
  display: inline-block;
  margin-top: 8px;
  background: #44403c;
  color: #fafaf9;
  text-decoration: none;
  padding: 12px 20px;
  font-size: 14px;
  letter-spacing: 0.03em;
}
.use:hover { background: #292524; }

.guide {
  border: 1px solid #a8a29e;
  background: #fff;
  padding: 20px 22px;
}
.guide h3 {
  margin: 0 0 12px;
  font-size: 16px;
  color: #44403c;
  font-weight: 700;
}
.guide ol { margin: 0; padding-left: 20px; }
.guide li { margin: 0 0 8px; }
.guide a { color: #44403c; }

.kicker {
  display: inline-block;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: #78716c;
  border: 1px solid #a8a29e;
  padding: 2px 8px;
  margin-bottom: 10px;
}
section { padding: 8px 0 28px; }
h2 {
  font-size: 26px;
  font-weight: 600;
  margin: 0 0 12px;
  color: #1c1917;
}
.intro {
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: #57534e;
  margin: 0 0 16px;
  max-width: 50em;
}

.tri {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}
.tri article {
  background: #fff;
  border: 1px solid #d6d3d1;
  padding: 18px 16px 16px;
}
.tri h3 { margin: 8px 0; font-size: 16px; color: #44403c; }
.tri p { margin: 0; color: #57534e; font-size: 14.5px; }

.classic {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border-top: 1px solid #a8a29e;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}
.classic article {
  padding: 16px 14px 18px;
  border-right: 1px solid #e7e5e4;
  background: #fff;
}
.classic article:last-child { border-right: 0; }
.classic .ttl {
  display: block;
  font-size: 12px;
  color: #78716c;
  margin-bottom: 6px;
}
.classic h3 { margin: 0 0 8px; font-size: 16px; }
.classic p { margin: 0; color: #57534e; font-size: 14px; }

table.formal {
  width: 100%;
  border-collapse: collapse;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 14.5px;
  background: #fff;
}
.formal th, .formal td {
  border: 1px solid #a8a29e;
  padding: 10px 12px;
  text-align: left;
  vertical-align: top;
}
.formal th { background: #e7e5e4; color: #44403c; }
.formal td:first-child { width: 20%; font-weight: 650; }

.edge {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 14px;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}
.edge article {
  background: #fff;
  padding: 14px 16px;
  border-bottom: 3px solid #44403c;
}
.edge h3 { margin: 0 0 8px; font-size: 16px; }
.edge p { margin: 0 0 8px; color: #57534e; font-size: 14.5px; }

.std { font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif; }
.std article {
  border-bottom: 1px solid #d6d3d1;
  padding: 14px 0;
}
.std h3 { margin: 0 0 8px; font-size: 17px; color: #1c1917; }
.std p { margin: 0 0 8px; color: #57534e; }

.colophon {
  border-top: 1px solid #a8a29e;
  background: #44403c;
  color: #e7e5e4;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 13px;
}
.colophon-inner { max-width: 1080px; margin: 0 auto; padding: 24px; }
.colophon p { margin: 0 0 8px; }

@media (max-width: 860px) {
  .billboard, .tri, .classic, .edge { grid-template-columns: 1fr; }
  .classic article { border-right: 0; border-bottom: 1px solid #e7e5e4; }
  .chrome-inner { flex-direction: column; align-items: flex-start; gap: 10px; }
  .billboard h1 { font-size: 28px; }
}

#news .news-list { border-top: 2px solid #44403c; }
#news article { padding: 18px 0 16px; border-bottom: 1px solid #d6d3d1; }
#news h3 { margin: 0 0 6px; font-size: 17px; color: #44403c; }
#news time { display: block; color: #a8a29e; font-size: 12px; margin-bottom: 8px; }
#news p { margin: 0; color: #57534e; font-size: 14px; max-width: 46em; }