:root {
  --library-blue: #1767d5;
  --library-blue-dark: #0f4fa9;
  --library-blue-soft: #edf5ff;
  --library-ink: #16233a;
  --library-body: #506078;
  --library-line: #d7e1ef;
  --library-paper: #ffffff;
  --library-ground: #f4f8fc;
  --library-max: 1080px;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  color: var(--library-ink);
  background: var(--library-ground);
}

* { box-sizing: border-box; }

body { margin: 0; min-width: 320px; overflow-x: hidden; background: var(--library-ground); color: var(--library-ink); }

a { color: var(--library-blue-dark); }

a:focus-visible, button:focus-visible, textarea:focus-visible { outline: 3px solid #8dbdf9; outline-offset: 3px; }

.library-shell { width: min(calc(100% - 40px), var(--library-max)); min-width: 0; margin: 0 auto; }

.skip-link { position: fixed; top: 10px; left: 10px; z-index: 20; padding: 10px 12px; background: var(--library-ink); color: white; transform: translateY(-160%); }
.skip-link:focus { transform: translateY(0); }

.library-header { border-bottom: 1px solid var(--library-line); background: var(--library-paper); }
.navigation { display: flex; min-height: 64px; align-items: center; justify-content: space-between; gap: 20px; }
.brand { color: var(--library-ink); font-size: 18px; font-weight: 800; letter-spacing: 0; text-decoration: none; }
.navigation div { display: flex; gap: 18px; font-size: 14px; }
.navigation a { text-decoration: none; }
.navigation a[aria-current="page"] { color: var(--library-ink); font-weight: 750; }

.library-intro { padding: 54px 0 28px; max-width: 780px; }
.eyebrow { margin: 0 0 9px; color: var(--library-blue); font-size: 12px; font-weight: 800; letter-spacing: 0; }
h1, h2, p { margin-top: 0; }
h1 { margin-bottom: 12px; font-size: 44px; line-height: 1.14; letter-spacing: 0; }
h2 { font-size: 20px; line-height: 1.35; letter-spacing: 0; }
p { color: var(--library-body); line-height: 1.7; }

.resource-list { border-top: 2px solid var(--library-ink); margin-bottom: 54px; }
.resource-row { display: grid; grid-template-columns: 86px minmax(0, 1fr) 116px; gap: 22px; align-items: start; padding: 24px 0; border-bottom: 1px solid var(--library-line); }
.resource-kind { color: var(--library-blue); font-size: 12px; font-weight: 800; padding-top: 5px; }
.resource-main h2 { margin-bottom: 7px; }
.resource-main h2 a { color: var(--library-ink); text-decoration: none; }
.resource-main p { margin-bottom: 12px; }
.resource-meta { display: grid; justify-items: end; gap: 10px; color: var(--library-body); font-size: 13px; }
.resource-meta a { font-weight: 750; }
.chip-list { display: flex; flex-wrap: wrap; gap: 7px; padding: 0; margin: 0; list-style: none; }
.chip-list li { border: 1px solid var(--library-line); background: var(--library-paper); padding: 3px 8px; color: var(--library-body); font-size: 12px; }

.library-footer { border-top: 1px solid var(--library-line); padding: 20px 0; background: var(--library-paper); color: var(--library-body); font-size: 13px; }

.detail-page { padding: 28px 0 56px; }
.breadcrumb { margin-bottom: 22px; font-size: 14px; }
.detail-hero { display: flex; min-width: 0; justify-content: space-between; align-items: end; gap: 30px; padding-bottom: 28px; border-bottom: 2px solid var(--library-ink); }
.detail-hero > div:first-child { max-width: 700px; }
.detail-hero > * { min-width: 0; }
.detail-hero h1 { margin-bottom: 10px; }
.detail-hero p { margin-bottom: 0; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.button { display: inline-flex; min-height: 40px; align-items: center; justify-content: center; padding: 8px 13px; border: 1px solid var(--library-blue); background: var(--library-paper); color: var(--library-blue-dark); font: inherit; font-size: 14px; font-weight: 750; text-decoration: none; cursor: pointer; }
.button.primary { background: var(--library-blue); color: white; }
.button:hover { border-color: var(--library-blue-dark); background: var(--library-blue-soft); }
.button.primary:hover { background: var(--library-blue-dark); }

.integrity-strip { display: grid; grid-template-columns: 150px minmax(0, 1fr) 130px; gap: 16px; min-width: 0; padding: 15px 0; border-bottom: 1px solid var(--library-line); }
.integrity-strip div { display: grid; gap: 4px; min-width: 0; }
.integrity-strip strong { color: var(--library-body); font-size: 12px; }
code { font-family: "SFMono-Regular", Consolas, monospace; font-size: 12px; overflow-wrap: anywhere; }

.copy-panel { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 14px 24px; min-width: 0; padding: 28px 0; border-bottom: 1px solid var(--library-line); }
.copy-panel > * { min-width: 0; }
.copy-panel h2 { margin-bottom: 6px; }
.copy-panel p { margin-bottom: 0; }
.copy-panel .button { align-self: start; }
.copy-status { grid-column: 1 / -1; min-height: 1.6em; font-size: 13px; color: var(--library-blue-dark); }
.copy-text { grid-column: 1 / -1; width: 100%; min-height: 192px; resize: vertical; border: 1px solid var(--library-line); border-radius: 0; padding: 14px; background: #fbfdff; color: var(--library-ink); font: 12px/1.6 "SFMono-Regular", Consolas, monospace; overflow-wrap: anywhere; word-break: break-word; }
.copy-panel .text-link { grid-column: 1 / -1; font-size: 14px; font-weight: 700; }

.overview-section { padding-top: 28px; }
.overview-section > h2 { margin-bottom: 0; }
.detail-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); min-width: 0; column-gap: 46px; }
.detail-section { padding: 28px 0; border-bottom: 1px solid var(--library-line); }
.detail-section h2 { margin-bottom: 13px; }
.plain-list { margin: 0; padding-left: 20px; color: var(--library-body); line-height: 1.8; }
.plain-list li + li { margin-top: 4px; }
.text-link { font-weight: 700; }
.table-wrap { overflow-x: auto; border-top: 1px solid var(--library-line); }
table { width: 100%; border-collapse: collapse; min-width: 690px; text-align: left; }
th, td { padding: 11px 10px; border-bottom: 1px solid var(--library-line); vertical-align: top; color: var(--library-body); font-size: 13px; }
th { color: var(--library-ink); font-weight: 750; }
td:first-child { min-width: 180px; }
.source-pre { max-height: 580px; overflow: auto; margin: 0; border: 1px solid var(--library-line); padding: 16px; background: #fbfdff; color: #24334a; font: 12px/1.65 "SFMono-Regular", Consolas, monospace; white-space: pre-wrap; overflow-wrap: anywhere; }
.source-details summary, .file-details summary { color: var(--library-blue-dark); cursor: pointer; font-weight: 750; }
.source-details[open] summary, .file-details[open] summary { margin-bottom: 16px; }
.file-directory { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px 40px; margin: 20px 0 24px; }
.file-directory section { min-width: 0; }
.file-directory h3 { margin: 0 0 7px; color: var(--library-body); font-size: 13px; }
.file-directory ul { margin: 0; padding-left: 18px; }
.file-directory li { min-width: 0; color: var(--library-body); font-size: 13px; line-height: 1.8; overflow-wrap: anywhere; }
.file-details { border-top: 1px solid var(--library-line); padding-top: 16px; }

@media (max-width: 720px) {
  .library-shell { width: min(calc(100% - 28px), var(--library-max)); }
  .navigation { min-height: 58px; }
  .navigation div { gap: 13px; }
  .library-intro { padding-top: 36px; }
  h1 { font-size: 30px; }
  .resource-row { grid-template-columns: 1fr; gap: 9px; padding: 20px 0; }
  .resource-kind { padding-top: 0; }
  .resource-meta { display: flex; justify-items: start; align-items: center; gap: 13px; }
  .detail-page { padding-top: 20px; }
  .detail-hero { display: grid; gap: 18px; }
  .integrity-strip, .detail-grid, .file-directory { grid-template-columns: 1fr; }
  .integrity-strip { gap: 12px; }
  .copy-panel { grid-template-columns: 1fr; }
  .copy-panel .button { width: 100%; }
}
 .navigation .brand { display: inline-flex; align-items: center; gap: 8px; }
 .navigation .brand img { width: 32px; height: 32px; object-fit: contain; }