* { box-sizing: border-box; }
body {
  margin: 0;
  background: #f7f7f5;
  color: #111;
  font-family: "IBM Plex Sans", "Segoe UI", "Microsoft YaHei", sans-serif;
  line-height: 1.65;
}
.term {
  background: #111;
  color: #d8ffe6;
  padding: 8px 0 0;
}
.term-row {
  width: min(1040px, calc(100% - 16px));
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 8px;
}
.term-row .id {
  color: #d8ffe6;
  text-decoration: none;
  font-family: "IBM Plex Mono", Consolas, monospace;
  font-weight: 700;
}
.seg {
  display: flex;
  background: #1c1c1c;
  border: 1px solid #2a2a2a;
}
.seg a {
  color: #8a8a8a;
  text-decoration: none;
  padding: 8px 14px;
  font-size: 0.86rem;
}
body.t-home .seg a.s1,
body.t-down .seg a.s2,
body.t-zh .seg a.s3,
.seg a.pick {
  background: #1f8a4c;
  color: #fff;
}
.chooser {
  width: min(1040px, calc(100% - 16px));
  margin: 20px auto 0;
}
.chooser h1 { font-size: 1.75rem; margin: 0 0 10px; }
.matrix {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin: 16px 0;
}
.cell {
  background: #fff;
  border: 1px solid #ddd;
  padding: 14px 16px;
}
.cell h2 { font-size: 1.05rem; margin: 0 0 8px; color: #1f8a4c; }
.dlbar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  background: #111;
  color: #d8ffe6;
  padding: 14px 16px;
  margin: 12px 0 20px;
}
.dlbar a {
  background: #1f8a4c;
  color: #fff;
  text-decoration: none;
  padding: 10px 14px;
  font-weight: 700;
}
.dlbar a.alt { background: #333; }
.code {
  font-family: Consolas, "IBM Plex Mono", monospace;
  font-size: 0.88rem;
  background: #111;
  color: #9cffc0;
  padding: 10px 12px;
}
.slab {
  width: min(1040px, calc(100% - 16px));
  margin: 0 auto 14px;
  background: #fff;
  border: 1px solid #ddd;
  padding: 16px 18px;
}
.slab h2 { margin: 0 0 8px; font-size: 1.2rem; }
table.picktab { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
table.picktab th, table.picktab td { border: 1px solid #ddd; padding: 8px; text-align: left; }
table.picktab th { background: #111; color: #d8ffe6; font-family: Consolas, monospace; font-weight: 500; }
.warnbox { border: 2px solid #c0392b; background: #fff5f4; }
.footline {
  background: #111;
  color: #8f8f8f;
  padding: 22px 0;
  font-size: 0.86rem;
}
.footline .in { width: min(1040px, calc(100% - 16px)); margin: 0 auto; }
.footline a { color: #9cffc0; margin-right: 10px; }
.intro-pick {
  width: min(1040px, calc(100% - 16px));
  margin: 0 auto 14px;
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 10px;
}
.intro-pick article {
  background: #fff;
  border: 1px dashed #1f8a4c;
  padding: 14px 14px 8px;
}
.intro-pick h2 { font-size: 1.02rem; margin: 0 0 8px; color: #1f8a4c; }
@media (max-width: 720px) {
  .intro-pick { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
  .matrix { grid-template-columns: 1fr; }
  .term-row { flex-direction: column; align-items: flex-start; gap: 8px; }
}