:root {
  color-scheme: light;
  --ground: #ebe8de;
  --paper: #fdfbf4;
  --ink: #353a30;
  --accent: #873e2c;
  --sage: #e3e9dd;
  --body: "PingFang SC", "Microsoft YaHei", sans-serif;
  --display: "Songti SC", "Noto Serif CJK SC", serif;
}

* { box-sizing: border-box; }
body { margin: 0; background: var(--ground); color: var(--ink); font: 16px/1.75 var(--body); }
a { color: var(--accent); text-underline-offset: .25em; }
:where(a, summary):focus-visible { outline: 3px solid var(--accent); outline-offset: 4px; }
.wrap { width: min(calc(100% - 32px), 960px); margin-inline: auto; }
.site-nav, footer { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; padding-block: 20px; }
.site-nav nav, footer nav { display: flex; flex-wrap: wrap; gap: 8px 20px; }
.site-nav a, footer a { color: var(--ink); padding-block: 8px; }
.brand { display: inline-flex; gap: 9px; align-items: center; font-weight: 650; text-decoration: none; }
.brand img { border-radius: 8px; }
article { background: var(--paper); padding: clamp(20px, 5vw, 60px); }
.hero { display: grid; grid-template-columns: 1.1fr 1fr; gap: 30px; align-items: center; }
h1, h2 { font-family: var(--display); line-height: 1.22; margin: 0 0 16px; }
h1 { font-size: clamp(25px, 4vw, 45px); letter-spacing: -.025em; }
h2 { font-size: clamp(24px, 3.5vw, 36px); }
p { margin: 0 0 14px; }
.lead { font-size: 18px; }
figure { margin: 0; }
figure img { width: 100%; height: auto; display: block; border-radius: 12px; }
figcaption { font-size: 14px; margin-top: 7px; }
article section { margin-top: clamp(44px, 8vw, 92px); }
.example { background: var(--sage); padding: clamp(15px, 3vw, 32px); }
table { width: 100%; border-collapse: collapse; text-align: left; font-variant-numeric: tabular-nums; }
th, td { padding: 7px 8px 7px 0; vertical-align: top; }
thead { border-bottom: 2px solid var(--ink); }
th:last-child, td:last-child { padding-right: 0; }
.note { font-size: 14px; margin: 10px 0 0; }
.walkthrough { display: grid; grid-template-columns: 1.2fr 1fr; gap: clamp(20px, 5vw, 48px); align-items: start; }
ol { padding-inline-start: 1.35em; margin: 0; }
li + li { margin-top: 14px; }
.gallery { display: grid; gap: 20px; }
details { background: var(--sage); padding: 8px 16px; }
details + details { margin-top: 8px; }
summary { cursor: pointer; min-height: 44px; padding-block: 8px; font-weight: 650; }
details p { margin: 0 0 10px; }
.actions { display: flex; align-items: center; flex-wrap: wrap; gap: 10px 20px; margin: 16px 0; }
.button { display: inline-block; background: var(--accent); color: white; padding: 9px 16px; border-radius: 8px; text-decoration: none; }
.button:hover { background: var(--ink); }
footer { font-size: 14px; }
@media (max-width: 660px) {
  .hero, .walkthrough { grid-template-columns: 1fr; }
  .hero { gap: 18px; }
  h1 { font-size: clamp(25px, 7.6vw, 39px); }
  .gallery { grid-template-columns: repeat(auto-fit, minmax(min(100%, 210px), 1fr)); }
  .example { padding-inline: 12px; }
  th, td { font-size: 14px; }
}