:root {
  color-scheme: light;
  --paper: #f6f5ef;
  --card: #fffef9;
  --ink: #182926;
  --muted: #546561;
  --line: #d6dcd3;
  --green: #1a5a47;
  --dark: #143d32;
  font-family: "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  line-height: 1.7;
  color: var(--ink);
  background: var(--paper);
}
* { box-sizing: border-box; }
body { margin: 0; }
a { color: var(--green); text-underline-offset: .22em; }
a:hover { color: var(--ink); }
a:focus-visible { outline: 2px solid #b7582a; outline-offset: 4px; }
header { border-bottom: 1px solid var(--line); }
.wrap { width: min(1120px, 100% - 48px); margin-inline: auto; }
.masthead {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 62px;
}
.brand {
  font-weight: 800;
  letter-spacing: .12em;
  color: var(--ink);
  text-decoration: none;
}
.masthead time { font-size: .83rem; font-variant-numeric: tabular-nums; color: var(--muted); }
.hero { padding: 48px 0 32px; }
h1, h2, h3, p { margin: 0; }
h1 {
  font-size: clamp(2.4rem, 6vw, 4.7rem);
  letter-spacing: -.06em;
  line-height: 1.16;
}
.hero p { max-width: 47rem; margin-top: 14px; color: var(--muted); }
.layout {
  display: grid;
  grid-template-columns: minmax(0, 3.2fr) minmax(190px, 1fr);
  gap: 34px;
  padding-bottom: 56px;
}
.experiment { padding: 24px 27px; background: var(--dark); color: #f9fff9; border-radius: 12px; }
.experiment h2 { font-size: 1.02rem; color: #c2e8c7; margin-bottom: 8px; }
.experiment p { font-size: 1.04rem; }
.section-title { margin: 28px 0 12px; font-size: 1.35rem; }
.entry {
  padding: 22px 25px;
  margin-bottom: 12px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow-wrap: anywhere;
}
.entry h3 { line-height: 1.36; font-size: 1.23rem; }
.meta { color: var(--muted); font-size: .79rem; margin: 6px 0 12px; }
.entry dl { display: grid; grid-template-columns: max-content 1fr; gap: 7px 13px; margin: 12px 0; font-size: .94rem; }
.entry dt { font-weight: 700; }
.entry dd { margin: 0; }
.sources { display: flex; flex-wrap: wrap; gap: 4px 16px; font-size: .83rem; margin: 0; padding: 0; list-style: none; }
.opportunity { margin-top: 18px; }
.notes { font-size: .86rem; color: var(--muted); margin-top: 16px; }
aside h2 { font-size: .98rem; padding-bottom: 8px; border-bottom: 1px solid var(--line); }
aside ul { list-style: none; margin: 8px 0 26px; padding: 0; }
aside li { padding-block: 4px; font-size: .88rem; }
aside a { display: inline-block; }
aside a[aria-current="page"] { color: var(--ink); font-weight: 700; }
@media (max-width: 760px) {
  .wrap { width: calc(100% - 32px); }
  .hero { padding: 35px 0 24px; }
  .layout { grid-template-columns: 1fr; gap: 28px; }
}
@media (max-width: 380px) {
  .entry dl { grid-template-columns: 1fr; gap: 2px; }
  .entry dd { margin-bottom: 7px; }
}