:root {
  --jg-paper: #e4f1fb;
  --jg-ink: #0b2e4f;
  --jg-ink-2: #31506d;
  --jg-vio: #6741d9;
  --jg-vio-deep: #5232b8;
  --jg-line: #bcd8ee;
  --jg-sub: #f7fbfe;
  --jg-grid: rgba(11, 46, 79, 0.055);
  --jg-r: 13px;
  --jg-rs: 5px;
  --jg-cjk: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --jg-lat: "Sitka Heading", "Sitka Text", "Book Antiqua", serif;
  --jg-wide: 1160px;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body.jg-body {
  margin: 0;
  background: var(--jg-paper);
  color: var(--jg-ink);
  font-family: var(--jg-cjk);
  font-size: 16px;
  line-height: 1.8;
  overflow-wrap: break-word;
}
img { max-width: 100%; height: auto; }
a { color: var(--jg-vio-deep); text-underline-offset: 3px; text-decoration-thickness: 1px; }
a:hover { color: var(--jg-ink); }
:focus-visible { outline: 3px solid var(--jg-vio); outline-offset: 2px; border-radius: 3px; }

.jg-skip {
  position: absolute; left: 12px; top: -60px; z-index: 10;
  background: var(--jg-ink); color: #fff; padding: 10px 16px; border-radius: var(--jg-rs);
  min-height: 44px; display: inline-flex; align-items: center;
}
.jg-skip:focus { top: 8px; color: #fff; }

.jg-top { background: var(--jg-sub); border-bottom: 1px solid var(--jg-line); }
.jg-top-in {
  max-width: var(--jg-wide); margin: 0 auto; padding: 0 24px;
  display: flex; align-items: center; justify-content: space-between; gap: 12px; min-height: 64px;
}
.jg-brand { color: var(--jg-ink); display: inline-flex; align-items: center; min-height: 44px; }
.jg-logo { display: block; }
.jg-nav { display: flex; gap: 4px; }
.jg-nav a {
  display: inline-flex; align-items: center; min-height: 44px; padding: 0 12px;
  color: var(--jg-ink); text-decoration: none; font-size: 15px; border-radius: var(--jg-rs);
}
.jg-nav a:hover { background: var(--jg-paper); }
.jg-nav a[aria-current="page"] { box-shadow: inset 0 -2px 0 var(--jg-vio); }

.jg-hero {
  background-color: var(--jg-paper);
  background-image:
    linear-gradient(90deg, transparent calc(50% - 1px), rgba(103, 65, 217, 0.10) calc(50% - 1px), rgba(103, 65, 217, 0.10) calc(50% + 1px), transparent calc(50% + 1px)),
    linear-gradient(var(--jg-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--jg-grid) 1px, transparent 1px);
  background-size: 100% 100%, 44px 44px, 44px 44px;
  border-bottom: 1px solid var(--jg-line);
}
.jg-hero-in {
  max-width: var(--jg-wide); margin: 0 auto; padding: 56px 24px 60px;
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  grid-template-areas: "h1 form" "lead form" "pick form";
  grid-template-rows: auto auto 1fr;
  column-gap: 56px; row-gap: 20px;
}
.jg-h1 {
  grid-area: h1; margin: 0;
  font-size: 51px; line-height: 1.24; font-weight: 700; letter-spacing: 0.01em;
  line-break: strict;
}
.jg-h1-part, .jg-art-h1 .jg-h1-part { display: inline-block; }
.jg-lead { grid-area: lead; margin: 0; font-size: 17px; color: var(--jg-ink-2); max-width: 34em; }
.jg-pick {
  grid-area: pick; align-self: start;
  display: grid; gap: 6px; padding: 18px 20px;
  background: var(--jg-sub); border: 1px solid var(--jg-line); border-radius: var(--jg-r);
  color: var(--jg-ink); text-decoration: none; max-width: 34em;
}
.jg-pick:hover { border-color: var(--jg-vio); color: var(--jg-ink); }
.jg-pick-tag { font-size: 13px; color: var(--jg-vio-deep); font-weight: 700; }
.jg-pick-t { font-size: 19px; font-weight: 700; line-height: 1.45; }
.jg-pick-d { font-size: 15px; color: var(--jg-ink-2); line-height: 1.7; }
.jg-pick-go { font-size: 15px; color: var(--jg-vio-deep); text-decoration: underline; text-underline-offset: 3px; }

.jg-form {
  grid-area: form; align-self: start;
  background: var(--jg-sub); border: 1px solid var(--jg-line); border-radius: var(--jg-r);
  box-shadow: 0 18px 40px -28px rgba(11, 46, 79, 0.45);
  overflow: hidden;
}
.jg-form-top { padding: 20px 22px 18px; }
.jg-form-cap { margin: 0 0 10px; font-size: 13px; color: var(--jg-ink-2); }
.jg-fields { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.jg-field { display: grid; gap: 4px; }
.jg-field-lab { font-size: 14px; font-weight: 700; line-height: 1.4; }
.jg-field-box {
  display: block; height: 36px; background: #fff;
  border: 1px solid var(--jg-line); border-radius: var(--jg-rs);
  background-image: linear-gradient(90deg, var(--jg-vio) 2px, transparent 2px);
  background-size: 2px 18px; background-repeat: no-repeat; background-position: 10px center;
}
.jg-field-hint { font-size: 13px; color: var(--jg-ink-2); line-height: 1.4; }
.jg-form-cut {
  position: relative; height: 0; margin: 0 18px;
  border-top: 2px dashed var(--jg-line);
}
.jg-form-cut::before, .jg-form-cut::after {
  content: ""; position: absolute; top: -12px; width: 22px; height: 22px; border-radius: 50%;
  background: var(--jg-paper); border: 1px solid var(--jg-line);
}
.jg-form-cut::before { left: -30px; }
.jg-form-cut::after { right: -30px; }

.jg-code { padding: 18px 22px 18px; }
.jg-code-row { display: flex; align-items: center; flex-wrap: wrap; gap: 6px 14px; }
.jg-code-lab { font-size: 14px; font-weight: 700; width: 100%; line-height: 1.4; }
.jg-code-val {
  font-family: var(--jg-lat); font-size: 34px; line-height: 1.15; letter-spacing: 0.08em;
  color: var(--jg-vio-deep); font-weight: 600; background: none; padding: 0;
  -webkit-user-select: all; user-select: all;
}
.jg-copy {
  min-height: 44px; min-width: 76px; padding: 0 18px;
  background: var(--jg-vio); color: #fff; border: 0; border-radius: var(--jg-rs);
  font: inherit; font-size: 16px; font-weight: 700; cursor: pointer;
}
.jg-copy:hover { background: var(--jg-vio-deep); }
.jg-gain { margin: 10px 0 0; font-size: 16px; line-height: 1.6; }
.jg-star { text-decoration: none; font-weight: 700; padding: 0 2px; }
.jg-nw { white-space: nowrap; }
.jg-fn { margin: 8px 0 0; font-size: 13px; line-height: 1.6; color: var(--jg-ink-2); }
.jg-go { margin: 14px 0 0; }
.jg-go-btn {
  display: inline-flex; align-items: center; min-height: 48px; padding: 0 22px;
  background: var(--jg-ink); color: #fff; border-radius: var(--jg-rs);
  text-decoration: none; font-weight: 700;
}
.jg-go-btn:hover { background: var(--jg-vio-deep); color: #fff; }
.jg-disc { margin: 10px 0 0; font-size: 14px; line-height: 1.7; color: var(--jg-ink-2); }
.jg-code-art {
  margin: 1.6em 0; background: var(--jg-sub);
  border: 2px solid var(--jg-vio); border-radius: var(--jg-r);
}

.jg-home-body {
  max-width: var(--jg-wide); margin: 0 auto; padding: 48px 24px 64px;
  display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr); gap: 56px;
}
.jg-home-blocks h2, .jg-home-list h2 { font-size: 23px; line-height: 1.45; margin: 0 0 12px; }
.jg-home-blocks h2::before, .jg-home-list h2::before {
  content: ""; display: block; width: 44px; height: 2px; background: var(--jg-vio); margin-bottom: 12px;
}
.jg-home-blocks h2:not(:first-child) { margin-top: 40px; }
.jg-home-blocks p, .jg-home-blocks li { max-width: 38em; }
.jg-home-blocks ul { padding-left: 1.2em; }
.jg-home-blocks li { margin: 6px 0; }
.jg-home-list { align-self: start; background: var(--jg-sub); border: 1px solid var(--jg-line); border-radius: var(--jg-r); padding: 22px; }
.jg-more { margin: 14px 0 0; }
.jg-more a { display: inline-flex; align-items: center; min-height: 44px; }

.jg-rows { list-style: none; margin: 0; padding: 0; }
.jg-row { padding: 14px 0; border-bottom: 1px solid var(--jg-line); }
.jg-row:first-child { padding-top: 4px; }
.jg-row-t { font-size: 18px; font-weight: 700; line-height: 1.5; color: var(--jg-ink); text-decoration: none; }
.jg-row-t:hover { color: var(--jg-vio-deep); text-decoration: underline; }
.jg-row-d { margin: 6px 0 0; font-size: 15px; color: var(--jg-ink-2); line-height: 1.7; }
.jg-row-m { margin: 4px 0 0; font-size: 13px; color: var(--jg-ink-2); }

.jg-crumb ol { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; align-items: center; font-size: 14px; }
.jg-crumb li { display: inline-flex; align-items: center; }
.jg-crumb li + li::before { content: "/"; color: var(--jg-ink-2); margin: 0 8px; }
.jg-crumb a, .jg-crumb span { display: inline-flex; align-items: center; min-height: 44px; }
.jg-crumb span { color: var(--jg-ink-2); }

.jg-art, .jg-list, .jg-doc { max-width: var(--jg-wide); margin: 0 auto; padding: 16px 24px 64px; }
.jg-art-head { max-width: 46em; padding: 8px 0 20px; }
.jg-art-h1, .jg-doc-h1 { font-size: 38px; line-height: 1.32; margin: 0 0 10px; line-break: strict; }
.jg-byline { margin: 0; font-size: 14px; color: var(--jg-ink-2); }
.jg-art-grid {
  display: grid; grid-template-columns: minmax(0, 46em) minmax(220px, 280px);
  grid-template-areas: "prose toc"; gap: 48px; align-items: start;
}
.jg-prose { grid-area: prose; font-size: 17px; line-height: 1.88; min-width: 0; }
.jg-warn { margin: 0 0 1.4em; padding: 12px 16px; background: var(--jg-sub); border: 1px solid var(--jg-line); border-left: 4px solid var(--jg-vio); border-radius: var(--jg-rs); }
.jg-warn p { margin: 0; }
.jg-warn strong { color: var(--jg-vio-deep); margin-right: .3em; }
.jg-prose > p, .jg-prose li { max-width: 38em; }
.jg-prose h2 { font-size: 26px; line-height: 1.45; margin: 2.2em 0 0.7em; padding-top: 18px; border-top: 1px solid var(--jg-line); scroll-margin-top: 16px; }
.jg-prose h3 { font-size: 19px; line-height: 1.5; margin: 1.8em 0 0.5em; scroll-margin-top: 16px; }
.jg-prose ul, .jg-prose ol { padding-left: 1.3em; }
.jg-prose li { margin: 0.35em 0; }
.jg-prose code {
  font-family: Consolas, "Courier New", monospace; font-size: 0.9em;
  background: var(--jg-sub); border: 1px solid var(--jg-line); border-radius: var(--jg-rs);
  padding: 1px 6px; word-break: break-all;
}
.jg-prose .jg-code-val { border: 0; background: none; padding: 0; font-family: var(--jg-lat); font-size: 34px; word-break: normal; }
.jg-toc-col { grid-area: toc; position: sticky; top: 16px; }
.jg-toc {
  background: var(--jg-sub); border: 1px solid var(--jg-line); border-radius: var(--jg-r);
  padding: 4px 16px 10px; font-size: 14px; line-height: 1.6;
}
.jg-toc summary { cursor: pointer; font-weight: 700; min-height: 44px; display: flex; align-items: center; list-style: none; }
.jg-toc summary::-webkit-details-marker { display: none; }
.jg-toc summary::after { content: "展开"; margin-left: auto; font-weight: 400; font-size: 13px; color: var(--jg-vio-deep); }
.jg-toc[open] summary::after { content: "收起"; }
.jg-toc ol { margin: 0; padding-left: 1.3em; }
.jg-toc li { margin: 2px 0; }
.jg-toc a { display: block; padding: 6px 0; color: var(--jg-ink); text-decoration: none; }
.jg-toc a:hover { color: var(--jg-vio-deep); text-decoration: underline; }

.jg-cover { margin: 0 0 1.8em; }
.jg-cover img { display: block; width: 100%; border-radius: var(--jg-r); border: 1px solid var(--jg-line); }
.jg-cover figcaption, .jg-shot figcaption {
  margin-top: 8px; font-size: 14px; line-height: 1.6; color: var(--jg-ink-2);
  padding-left: 10px; border-left: 2px solid var(--jg-vio);
}
.jg-shot { margin: 1.6em 0; }
.jg-shot img { display: block; border-radius: var(--jg-rs); border: 1px solid var(--jg-line); background: #1e2329; }
.jg-shot-narrow img { max-width: min(100%, 420px); }

.jg-tbl { overflow-x: auto; margin: 1.4em 0; border: 1px solid var(--jg-line); border-radius: var(--jg-rs); background: var(--jg-sub); }
.jg-tbl table { border-collapse: collapse; width: 100%; min-width: 600px; font-size: 15px; line-height: 1.6; }
.jg-tbl th, .jg-tbl td { text-align: left; vertical-align: top; padding: 10px 12px; border-bottom: 1px solid var(--jg-line); }
.jg-tbl th { background: #fff; font-weight: 700; }
.jg-tbl tr:last-child td { border-bottom: 0; }
.jg-al-center { text-align: center; }
.jg-al-right { text-align: right; }

.jg-faq { margin-top: 2.4em; }
.jg-qa { padding: 4px 0 8px; border-bottom: 1px solid var(--jg-line); }
.jg-q { font-size: 18px; margin: 1em 0 0.4em; }
.jg-a { margin: 0 0 0.8em; }

.jg-after { max-width: 46em; margin-top: 48px; padding-top: 20px; border-top: 2px solid var(--jg-ink); }
.jg-tags-h, .jg-next-h { font-weight: 700; margin: 0 0 8px; }
.jg-tags ul { list-style: none; padding: 0; margin: 0 0 24px; display: flex; flex-wrap: wrap; gap: 8px; }
.jg-tag { display: inline-flex; align-items: center; min-height: 32px; padding: 2px 12px; border: 1px solid var(--jg-line); border-radius: var(--jg-rs); background: var(--jg-sub); font-size: 14px; }
.jg-next ul { margin: 0; padding-left: 1.2em; }
.jg-next a { display: inline-flex; align-items: center; min-height: 44px; }

.jg-list-head, .jg-doc-body { max-width: 46em; }
.jg-list-intro p { margin: 0 0 12px; max-width: 38em; color: var(--jg-ink-2); }
.jg-list-n, .jg-list-syn { font-size: 14px; color: var(--jg-ink-2); margin: 0 0 18px; }
.jg-mainlist { max-width: 46em; }
.jg-pages { display: flex; gap: 16px; align-items: center; margin-top: 24px; }
.jg-pages a { display: inline-flex; align-items: center; min-height: 44px; }
.jg-doc .jg-prose { margin-top: 16px; }
.jg-doc .jg-prose h2:first-child { margin-top: 1em; }

.jg-find-form { margin: 20px 0 10px; max-width: 40em; }
.jg-find-lab { display: block; font-weight: 700; margin-bottom: 6px; }
.jg-find-row { display: flex; gap: 8px; }
.jg-find-in {
  flex: 1; min-width: 0; min-height: 48px; padding: 0 14px; font: inherit; font-size: 16px;
  border: 1px solid var(--jg-line); border-radius: var(--jg-rs); background: #fff; color: var(--jg-ink);
}
.jg-find-btn { min-height: 48px; padding: 0 20px; border: 0; border-radius: var(--jg-rs); background: var(--jg-ink); color: #fff; font: inherit; font-weight: 700; cursor: pointer; }
.jg-find-state { color: var(--jg-ink-2); font-size: 14px; min-height: 1.6em; }
.jg-find mark { background: #ddd3fb; color: inherit; padding: 0 2px; }
.jg-nf-links a { display: inline-flex; align-items: center; min-height: 44px; }

.jg-foot { background: var(--jg-ink); color: #dbe9f6; }
.jg-foot a { color: #e9f3fc; }
.jg-foot a:hover { color: #fff; }
.jg-foot :focus-visible { outline-color: #fff; }
.jg-foot-in { max-width: var(--jg-wide); margin: 0 auto; padding: 36px 24px 28px; font-size: 14px; line-height: 1.75; }
.jg-foot-brand { color: #e4f1fb; display: inline-flex; min-height: 44px; align-items: center; }
.jg-foot-id p { margin: 6px 0; max-width: 46em; }
.jg-foot-nav { display: flex; flex-wrap: wrap; gap: 0 18px; margin: 16px 0 6px; padding: 10px 0; border-top: 1px solid rgba(228, 241, 251, 0.2); border-bottom: 1px solid rgba(228, 241, 251, 0.2); }
.jg-foot-nav a { display: inline-flex; align-items: center; min-height: 44px; }
.jg-foot-rss { margin: 8px 0; }
.jg-foot-rss a { display: inline-flex; align-items: center; min-height: 44px; }
.jg-foot-yr { margin: 4px 0 0; color: #a9c3dc; font-family: var(--jg-lat); }

@media (max-width: 959px) {
  .jg-hero-in {
    grid-template-columns: minmax(0, 1fr);
    grid-template-areas: "h1" "form" "pick" "lead";
    grid-template-rows: none;
    padding: 18px 16px 32px; row-gap: 14px;
  }
  .jg-h1 { font-size: 30px; line-height: 1.25; }
  .jg-home-body { grid-template-columns: minmax(0, 1fr); padding: 32px 16px 48px; gap: 36px; }
  .jg-art-grid { grid-template-columns: minmax(0, 1fr); grid-template-areas: "toc" "prose"; gap: 20px; }
  .jg-toc-col { position: static; }
  .jg-art, .jg-list, .jg-doc { padding: 8px 16px 48px; }
  .jg-art-h1, .jg-doc-h1 { font-size: 27px; }
  .jg-prose { font-size: 16px; }
  .jg-prose h2 { font-size: 22px; }
  .jg-prose h3 { font-size: 18px; }
  .jg-foot-in { padding: 28px 16px 24px; }
}
@media (max-width: 520px) {
  .jg-top-in { padding: 0 10px 0 16px; min-height: 56px; gap: 4px; }
  .jg-logo { width: 92px; height: auto; }
  .jg-nav { gap: 0; }
  .jg-nav a { padding: 0 9px; }
  .jg-form-top { padding: 12px 14px 12px; }
  .jg-form-cap { margin-bottom: 6px; }
  .jg-fields { gap: 10px; }
  .jg-field-box { height: 30px; }
  .jg-code { padding: 12px 14px 14px; }
  .jg-code-lab { width: auto; }
  .jg-code-val { font-size: 28px; }
  .jg-gain { margin-top: 8px; font-size: 15px; }
  .jg-fn { margin-top: 6px; }
  .jg-pick { padding: 12px 14px; gap: 4px; }
  .jg-pick-t { font-size: 17px; }
  .jg-pick-d { display: none; }
  .jg-form-cut { margin: 0 12px; }
  .jg-form-cut::before { left: -24px; }
  .jg-form-cut::after { right: -24px; }
  .jg-find-row { flex-direction: column; }
  .jg-pages { flex-wrap: wrap; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; scroll-behavior: auto !important; }
}