:root {
  color-scheme: dark;
  --ink: #0b1420;
  --panel: #111e2c;
  --paper: #edf3f6;
  --muted: #9bb0c0;
  --line: rgba(143, 184, 201, 0.22);
  --yellow: #f3c64e;
  --green: #7bd8b2;
  font-family: Inter, "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background:
    linear-gradient(rgba(93, 142, 157, 0.08) 1px, transparent 1px) 0 0 / 24px 24px,
    linear-gradient(90deg, rgba(93, 142, 157, 0.08) 1px, transparent 1px) 0 0 / 24px 24px,
    var(--ink);
  color: var(--paper);
}
a { color: inherit; }
.skip-link { position: fixed; top: 8px; left: 8px; z-index: 10; transform: translateY(-140%); padding: 10px 14px; background: var(--yellow); color: var(--ink); font-weight: 800; }
.skip-link:focus { transform: translateY(0); }
.site-header {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  padding: 12px clamp(18px, 5vw, 72px);
  border-bottom: 1px solid var(--line);
  background: rgba(11, 20, 32, 0.92);
  backdrop-filter: blur(16px);
}
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.brand img { width: 40px; height: 40px; border: 1px solid var(--yellow); object-fit: cover; }
.brand span { display: grid; gap: 2px; }
.brand strong { letter-spacing: 0.06em; }
.brand small, .meta, .eyebrow { font: 700 11px/1.4 ui-monospace, SFMono-Regular, Consolas, monospace; letter-spacing: 0.12em; }
.brand small { color: var(--yellow); }
.back { padding: 10px 14px; border: 1px solid var(--line); text-decoration: none; font-size: 13px; font-weight: 700; }
.back:hover, .back:focus-visible { border-color: var(--yellow); color: var(--yellow); }
main { width: min(920px, calc(100% - 36px)); margin: 0 auto; }
article { padding: clamp(64px, 10vw, 120px) 0 96px; }
.article-head { padding-bottom: 56px; border-bottom: 1px solid var(--line); }
.meta { display: flex; flex-wrap: wrap; gap: 10px; color: var(--yellow); }
.meta span, .meta time { padding: 6px 9px; border: 1px solid rgba(243, 198, 78, 0.28); }
h1 { max-width: 13ch; margin: 26px 0 24px; font-family: Georgia, "Noto Serif SC", serif; font-size: clamp(46px, 8vw, 82px); line-height: 1.03; letter-spacing: -0.055em; }
.lead { max-width: 62ch; margin: 0; color: #c8d4dc; font-size: clamp(17px, 2.2vw, 21px); line-height: 1.9; }
section { padding: 58px 0; border-bottom: 1px solid var(--line); }
.eyebrow { margin: 0 0 14px; color: var(--green); }
h2 { margin: 0 0 20px; font-size: clamp(27px, 4vw, 40px); line-height: 1.2; }
section p, li { color: #bfced8; font-size: 16px; line-height: 1.9; }
code, pre { font-family: ui-monospace, SFMono-Regular, Consolas, monospace; }
code { color: var(--yellow); }
pre { overflow-x: auto; margin: 28px 0 0; padding: 22px; border: 1px solid var(--line); background: #071019; color: var(--green); line-height: 1.75; }
.note { margin-top: 26px; padding: 18px 20px; border-left: 3px solid var(--yellow); background: rgba(243, 198, 78, 0.07); color: #dce5ea; line-height: 1.75; }
ul { display: grid; gap: 12px; padding: 0; list-style: none; }
li { display: grid; grid-template-columns: 96px 1fr; gap: 18px; padding: 16px 0; border-bottom: 1px dashed var(--line); }
li strong { color: var(--yellow); font-family: ui-monospace, SFMono-Regular, Consolas, monospace; }
.checklist { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 26px; }
.checklist span { padding: 9px 12px; border: 1px solid rgba(123, 216, 178, 0.32); color: var(--green); font: 700 12px/1.4 ui-monospace, SFMono-Regular, Consolas, monospace; }
.article-foot { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 20px; padding-top: 36px; }
.article-foot p { color: var(--muted); font-size: 13px; }
.article-foot a { padding: 13px 16px; background: var(--yellow); color: var(--ink); font-weight: 800; text-decoration: none; }
:focus-visible { outline: 3px solid var(--yellow); outline-offset: 4px; }
::selection { background: var(--yellow); color: var(--ink); }
@media (max-width: 560px) {
  .site-header { min-height: 64px; padding-inline: 14px; }
  .brand small { display: none; }
  .back { padding: 9px 10px; font-size: 12px; }
  article { padding-top: 54px; }
  h1 { font-size: clamp(43px, 13vw, 58px); }
  li { grid-template-columns: 1fr; gap: 3px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}