:root {
  color-scheme: light;
  --paper: #f7f5ed;
  --ink: #1c2922;
  --muted: #505b51;
  --green: #2e5c45;
  --rule: #d6d9ce;
  --wash: #e9eee4;
  --serif: "Songti SC", STSong, "Noto Serif CJK SC", SimSun, serif;
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  line-height: 1.7;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-padding-top: 1.5rem; }
body { margin: 0; background: var(--paper); color: var(--ink); }
h1, h2, p, figure { margin: 0; }
h1, h2 { font-family: var(--serif); }
a { color: inherit; text-underline-offset: .24em; }
a:hover { color: var(--green); }
:focus-visible { outline: 2px solid var(--green); outline-offset: 5px; }
.frame { width: min(100% - 5rem, 73rem); margin-inline: auto; }

.masthead {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: .6rem 1.25rem;
  border-bottom: 1px solid var(--rule);
}
.masthead { padding-block: 1.15rem; }
.wordmark {
  display: inline-flex;
  align-items: center;
  gap: .65rem;
  text-decoration: none;
  font-weight: 600;
  letter-spacing: .025em;
}
.seal {
  display: grid;
  place-content: center;
  width: 1.85rem;
  height: 1.85rem;
  background: var(--green);
  color: var(--paper);
  font-family: var(--serif);
  font-size: .97rem;
}
nav { display: flex; gap: clamp(.8rem, 3.2vw, 2rem); }
nav a { text-decoration: none; color: var(--muted); font-size: .88rem; }
nav a:hover { text-decoration: underline; }

.hero {
  display: grid;
  grid-template-columns: minmax(0, .9fr) minmax(0, 1.2fr);
  align-items: center;
  gap: clamp(2rem, 5vw, 5rem);
  margin-block: clamp(2rem, 5vw, 4rem) clamp(3rem, 6vw, 5rem);
}
.hero h1 {
  font-size: clamp(2.7rem, 6vw, 5.5rem);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: .045em;
}
.hero h1 span { display: block; }
.hero p {
  max-width: 26rem;
  margin-top: 1.4rem;
  color: var(--muted);
  font-size: clamp(.98rem, 1.5vw, 1.12rem);
  line-height: 1.9;
}
.hero figure { padding: .46rem; border: 1px solid var(--rule); }
.hero img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1.68;
  object-fit: cover;
  object-position: 55% 54%;
  background: var(--wash);
}

.reading {
  display: grid;
  grid-template-columns: minmax(11rem, .58fr) minmax(0, 1.42fr);
  gap: clamp(2rem, 6vw, 5rem);
  padding-block: 2.15rem 3.5rem;
  border-top: 1px solid var(--ink);
}
h2 { font-size: clamp(1.65rem, 3vw, 2.35rem); line-height: 1.25; letter-spacing: .045em; }
code {
  padding: .06em .22em;
  border-radius: .16rem;
  background: var(--wash);
  color: var(--green);
  overflow-wrap: anywhere;
}

.footer {
  border-top: 1px solid var(--rule);
  padding-block: 1.25rem 1.7rem;
  text-align: center;
  color: var(--muted);
  font-size: .83rem;
}

@media (max-width: 52rem) {
  .frame { width: calc(100% - 2.5rem); }
  .hero { gap: 1.65rem; }
  .reading { gap: 1.6rem; grid-template-columns: minmax(7rem, .5fr) minmax(0, 1.5fr); }
}
@media (max-width: 38rem) {
  .frame { width: calc(100% - 2.25rem); }
  .masthead { padding-block: .9rem; }
  .wordmark { font-size: .9rem; }
  .hero, .reading { grid-template-columns: minmax(0, 1fr); }
  .hero { margin-block: 2.2rem 2.8rem; }
  .hero h1 { font-size: clamp(2rem, 9vw, 3.65rem); white-space: nowrap; }
  .hero h1 span { display: inline; }
  .hero p { margin-top: .9rem; }
  .reading { padding-block: 1.6rem 2.3rem; }
}

nav a[aria-current="page"] {
  color: var(--green);
  text-decoration: underline;
}

.article-list { list-style: none; margin: 0; padding: 0; }
.article-list li { border-bottom: 1px solid var(--rule); }
.article-list li:first-child { border-top: 1px solid var(--rule); }
.article-link {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 2rem;
  align-items: center;
  gap: .2rem 1.25rem;
  padding: 1.15rem .15rem 1.25rem;
  text-decoration: none;
}
.topic { color: var(--green); font-size: .8rem; font-weight: 600; }
.article-link h3 {
  grid-column: 1;
  margin: 0;
  font: 700 clamp(1.2rem, 2.5vw, 1.65rem)/1.4 var(--serif);
}
.article-link:hover h3 { text-decoration: underline; text-decoration-thickness: 1px; }
.description { grid-column: 1; color: var(--muted); font-size: .9rem; }
.arrow { grid-column: 2; grid-row: 1 / span 3; text-align: center; color: var(--green); }

.reading-page { width: min(100%, 43rem); margin-inline: auto; padding-block: clamp(2rem, 5vw, 4rem); }
.back-link { font-size: .88rem; color: var(--green); text-decoration: none; }
.back-link:hover { text-decoration: underline; }
.reading-heading { margin-top: 2rem; padding-bottom: 1.45rem; border-bottom: 1px solid var(--rule); }
.reading-heading .topic { margin-bottom: .45rem; }
.reading-heading h1 { font-size: clamp(2rem, 5vw, 3.65rem); line-height: 1.22; }
.prose { padding-top: 1.55rem; font-size: clamp(1rem, 2vw, 1.12rem); line-height: 1.95; overflow-wrap: anywhere; }
.prose > * + * { margin-block-start: 1.2em; }
.prose ul, .prose ol { padding-inline-start: 1.45em; }
.prose li + li { margin-block-start: .25em; }

@media (max-width: 38rem) {
  .article-link { gap: .2rem .65rem; }
  .reading-heading { margin-top: 1.25rem; padding-bottom: 1rem; }
}