:root {
  --paper: #faf7f1;
  --paper-deep: #f1e9da;
  --ink: #201c18;
  --muted: #6d655c;
  --soft: #9b9286;
  --gold: #b8924d;
  --gold-deep: #8b6930;
  --orange: #d85a3d;
  --line: #e5dccd;
  --code: #17201d;
  --serif: "Noto Serif SC", "Songti SC", "STSong", Georgia, serif;
  --sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 92px; }
body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 85% 4%, rgba(184, 146, 77, .12), transparent 27rem),
    radial-gradient(circle at 2% 44%, rgba(216, 90, 61, .05), transparent 30rem),
    var(--paper);
  font-family: var(--sans);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }
img { display: block; max-width: 100%; }

.sitebar {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 68px;
  padding: 12px max(24px, calc((100vw - 1240px) / 2));
  border-bottom: 1px solid rgba(184, 146, 77, .18);
  background: rgba(250, 247, 241, .88);
  backdrop-filter: blur(18px);
}

.sitebar a { text-decoration: none; }
.back-link { color: var(--muted); font-size: 13px; letter-spacing: .08em; }
.back-link:hover { color: var(--gold-deep); }
.brand { color: var(--gold-deep); font-family: "Cormorant Garamond", var(--serif); font-size: 24px; font-weight: 600; }
.brand span { margin-left: 5px; font-family: var(--serif); font-size: 12px; letter-spacing: .14em; }

.page-shell { width: min(1240px, calc(100% - 48px)); margin: 0 auto; }
.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(300px, .72fr);
  gap: clamp(40px, 7vw, 92px);
  align-items: center;
  padding: clamp(64px, 9vw, 112px) 0 72px;
}
.eyebrow { margin: 0 0 18px; color: var(--gold-deep); font-family: "Cormorant Garamond", var(--serif); font-size: 13px; font-weight: 600; letter-spacing: .26em; }
h1 { margin: 0; font-family: var(--serif); font-size: clamp(40px, 6.2vw, 78px); font-weight: 600; line-height: 1.16; letter-spacing: -.04em; }
.lead { max-width: 690px; margin: 24px 0 0; color: var(--muted); font-size: 16px; line-height: 2; }

.search-box { margin-top: 34px; }
.search-box label { display: block; margin-bottom: 9px; color: var(--ink); font-size: 13px; font-weight: 600; }
.search-row { display: grid; grid-template-columns: minmax(0, 1fr) auto auto; gap: 8px; }
.search-row input {
  min-width: 0;
  height: 48px;
  padding: 0 15px;
  border: 1px solid var(--line);
  border-radius: 8px;
  outline: none;
  color: var(--ink);
  background: rgba(255,255,255,.8);
  font: inherit;
}
.search-row input:focus { border-color: var(--gold); box-shadow: 0 0 0 3px rgba(184,146,77,.12); }
.search-row button {
  padding: 0 18px;
  border: 1px solid var(--gold-deep);
  border-radius: 8px;
  color: #fff;
  background: var(--gold-deep);
  cursor: pointer;
  font: 500 13px var(--sans);
}
.search-row .clear-button { border-color: var(--line); color: var(--muted); background: transparent; }
#search-status { min-height: 1.8em; margin: 8px 2px 0; color: var(--soft); font-size: 12px; }

.operation-card { margin: 0; padding: 14px; border: 1px solid var(--line); border-radius: 10px; background: rgba(255,255,255,.66); box-shadow: 0 24px 64px rgba(63,47,25,.12); transform: rotate(1deg); }
.operation-card > a { display: block; overflow: hidden; border-radius: 5px; }
.operation-card img { width: 100%; transition: transform .45s ease; }
.operation-card a:hover img { transform: scale(1.02); }
.operation-card figcaption { display: flex; justify-content: space-between; gap: 16px; padding: 13px 3px 2px; color: var(--muted); font-size: 12px; }
.operation-card figcaption a { color: var(--gold-deep); text-decoration: none; }

.resource-strip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  margin-bottom: 54px;
  padding: 22px 26px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--gold);
  border-radius: 8px;
  background: rgba(255,255,255,.55);
}
.resource-strip strong, .resource-strip span { display: block; }
.resource-strip strong { margin-bottom: 3px; font-family: var(--serif); font-size: 17px; }
.resource-strip span { color: var(--muted); font-size: 13px; }
.download-links { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 9px; }
.download-links a { padding: 8px 12px; border: 1px solid var(--line); border-radius: 6px; color: var(--gold-deep); background: var(--paper); font-size: 12px; text-decoration: none; }
.download-links a:hover { border-color: var(--gold); }

.content-layout { display: grid; grid-template-columns: 260px minmax(0, 760px); gap: clamp(42px, 7vw, 88px); align-items: start; justify-content: center; }
.toc-panel { position: sticky; top: 92px; max-height: calc(100vh - 116px); overflow: auto; padding: 24px 22px; border: 1px solid var(--line); border-radius: 8px; background: rgba(255,255,255,.52); }
.toc-label { margin: 0 0 13px; color: var(--gold-deep); font-family: var(--serif); font-weight: 600; letter-spacing: .12em; }
#TOC ul { margin: 0; padding: 0; list-style: none; }
#TOC ul ul { display: none; }
#TOC li { margin: 0 0 8px; }
#TOC a { display: block; color: var(--muted); font-size: 12px; line-height: 1.55; text-decoration: none; }
#TOC a:hover { color: var(--gold-deep); }

.manual-content { min-width: 0; padding-bottom: 100px; }
.manual-content > h2:first-child { margin-top: 0; }
.manual-content h2, .manual-content h3, .manual-content h4 { scroll-margin-top: 92px; font-family: var(--serif); color: var(--ink); line-height: 1.42; }
.manual-content h2 { margin: 88px 0 25px; padding-top: 24px; border-top: 1px solid var(--line); font-size: clamp(29px, 3.5vw, 40px); }
.manual-content h3 { margin: 50px 0 18px; font-size: 25px; }
.manual-content h4 { margin: 34px 0 15px; font-size: 19px; }
.manual-content p { margin: 0 0 20px; }
.manual-content blockquote { margin: 30px 0; padding: 18px 22px; border-left: 3px solid var(--gold); color: #50473e; background: var(--paper-deep); }
.manual-content blockquote > :last-child { margin-bottom: 0; }
.manual-content a { color: var(--gold-deep); text-underline-offset: 3px; }
.manual-content ul, .manual-content ol { padding-left: 1.4em; }
.manual-content li { margin-bottom: 7px; }
.manual-content hr { margin: 58px 0; border: 0; border-top: 1px solid var(--line); }
.manual-content table { display: block; width: 100%; margin: 26px 0 34px; overflow-x: auto; border-collapse: collapse; font-size: 13px; line-height: 1.65; }
.manual-content th, .manual-content td { min-width: 120px; padding: 11px 13px; border: 1px solid var(--line); text-align: left; vertical-align: top; }
.manual-content th { color: var(--gold-deep); background: var(--paper-deep); }
.manual-content code { padding: .14em .36em; border-radius: 4px; color: #7d3e2f; background: #eee5d6; font-family: "SFMono-Regular", Consolas, monospace; font-size: .88em; }
.manual-content pre { position: relative; margin: 25px 0 32px; padding: 22px; overflow: auto; border-radius: 8px; color: #ecf1ee; background: var(--code); box-shadow: inset 3px 0 var(--gold); }
.manual-content pre code { padding: 0; color: inherit; background: none; font-size: 13px; line-height: 1.75; }
.copy-code { position: absolute; top: 9px; right: 9px; padding: 6px 9px; border: 1px solid rgba(255,255,255,.16); border-radius: 5px; color: #d7dfda; background: rgba(255,255,255,.08); cursor: pointer; font: 12px var(--sans); }
.copy-code:hover { background: rgba(255,255,255,.15); }
mark { padding: 0 .08em; color: var(--ink); background: #ffd77a; }
.search-current { outline: 2px solid var(--orange); outline-offset: 2px; }

footer { display: flex; justify-content: space-between; gap: 20px; width: min(1240px, calc(100% - 48px)); margin: 0 auto; padding: 28px 0 42px; border-top: 1px solid var(--line); color: var(--soft); font: 12px var(--serif); letter-spacing: .08em; }

@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; }
  .operation-card { width: min(520px, 100%); transform: none; }
  .content-layout { grid-template-columns: 1fr; }
  .toc-panel { position: static; max-height: none; }
  #TOC ul ul { display: block; padding-left: 16px; }
}

@media (max-width: 620px) {
  .sitebar { min-height: 60px; padding: 10px 18px; }
  .brand span { display: none; }
  .page-shell, footer { width: min(100% - 28px, 1240px); }
  .hero { padding: 48px 0 52px; gap: 38px; }
  h1 { font-size: 42px; }
  .search-row { grid-template-columns: 1fr auto; }
  .search-row .clear-button { grid-column: 1 / -1; height: 38px; }
  .resource-strip { align-items: flex-start; flex-direction: column; }
  .download-links { justify-content: flex-start; }
  .manual-content h2 { margin-top: 64px; font-size: 30px; }
  .manual-content pre { margin-left: -7px; margin-right: -7px; padding: 18px 14px; }
  footer { flex-direction: column; }
}

@media print {
  .sitebar, .search-box, .resource-strip, .toc-panel, .copy-code { display: none !important; }
  .page-shell { width: 100%; }
  .hero { display: block; padding: 20px 0; }
  .operation-card { width: 45%; margin-top: 20px; box-shadow: none; transform: none; }
  .content-layout { display: block; }
}