@font-face {
  font-family: "Noto Sans SC Variable";
  src: url('/assets/noto-sans-sc-hhj.woff2') format('woff2');
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
}

:root {
  --article-blue: #0a84ff;
  --article-ink: #101113;
  --article-muted: #68686d;
  --article-paper: #f5f5f7;
  --article-line: rgba(16, 17, 19, .12);
  --article-width: min(1120px, calc(100vw - 80px));
}

html { scroll-padding-top: 96px; }
body { background: var(--article-paper); }
.site-head { background: rgba(17, 18, 16, .84); -webkit-backdrop-filter: blur(22px) saturate(170%); backdrop-filter: blur(22px) saturate(170%); }
.site-nav a { min-height: 44px; display: inline-flex; align-items: center; }
.site-nav a:active, .article-card-link:active, .article-back:active, .article-toc a:active { transform: scale(.97); }

.articles-hero { width: var(--article-width); min-height: 500px; margin: 0 auto; display: flex; align-items: flex-end; padding: 112px 0 72px; }
.articles-hero > div { max-width: 900px; }
.article-eyebrow { margin: 0 0 22px; color: var(--article-blue); font-size: .72rem; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; }
.articles-hero h1, .article-header h1 { margin: 0; color: var(--article-ink); font-size: clamp(3.4rem, 8vw, 7.5rem); line-height: .96; letter-spacing: -.065em; }
.articles-hero > div > p:last-child { max-width: 660px; margin: 30px 0 0; color: var(--article-muted); font-size: clamp(1.05rem, 2vw, 1.42rem); line-height: 1.65; }

.article-index-section, .article-related { width: var(--article-width); margin: 0 auto; padding: 78px 0 110px; border-top: 1px solid var(--article-line); }
.article-section-label, .article-related > div:first-child { display: grid; grid-template-columns: 120px 1fr; align-items: baseline; gap: 24px; margin-bottom: 38px; }
.article-section-label span, .article-related > div:first-child span { color: var(--article-blue); font-size: .7rem; font-weight: 800; letter-spacing: .12em; }
.article-section-label h2, .article-related h2 { margin: 0; font-size: clamp(2rem, 4vw, 3.5rem); line-height: 1.05; letter-spacing: -.05em; }
.article-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.article-card { min-width: 0; border-radius: 30px; background: #fff; box-shadow: 0 1px 0 rgba(0,0,0,.03); overflow: hidden; }
.article-card-link { min-height: 330px; display: flex; flex-direction: column; padding: clamp(26px, 4vw, 46px); transition: transform .1s ease-out, box-shadow .22s ease-out; }
.article-card-link:hover { box-shadow: 0 18px 50px rgba(0,0,0,.08); }
.article-card-meta { display: flex; justify-content: space-between; gap: 20px; color: var(--article-muted); font-size: .72rem; font-weight: 650; }
.article-card-meta span { color: var(--article-blue); }
.article-card h2 { margin: 50px 0 16px; font-size: clamp(1.65rem, 3vw, 2.6rem); line-height: 1.08; letter-spacing: -.045em; }
.article-card p { margin: 0; color: var(--article-muted); font-size: .95rem; line-height: 1.72; }
.article-card-action { margin-top: auto; padding-top: 34px; color: var(--article-blue); font-size: .85rem; font-weight: 750; }
.article-card-action i { margin-left: 5px; font-style: normal; }

.article-page { width: var(--article-width); margin: 0 auto; }
.article-header { max-width: 980px; padding: 100px 0 72px; }
.article-back { display: inline-flex; min-height: 44px; align-items: center; margin-bottom: 62px; color: var(--article-muted); font-size: .78rem; font-weight: 700; transition: color .16s ease, transform .1s ease-out; }
.article-back:hover { color: var(--article-blue); }
.article-header h1 { max-width: 980px; font-size: clamp(3rem, 7vw, 6.7rem); }
.article-deck { max-width: 760px; margin: 30px 0 0; color: var(--article-muted); font-size: clamp(1.05rem, 2vw, 1.35rem); line-height: 1.7; }
.article-byline { display: flex; flex-wrap: wrap; gap: 10px 24px; margin-top: 42px; color: var(--article-muted); font-size: .76rem; font-weight: 650; }
.article-byline span:first-child { color: var(--article-ink); }
.article-layout { display: grid; grid-template-columns: 220px minmax(0, 760px); justify-content: space-between; gap: 70px; padding: 70px 0 110px; border-top: 1px solid var(--article-line); }
.article-toc { position: sticky; top: 100px; }
.article-toc strong { font-size: .72rem; letter-spacing: .08em; }
.article-toc ol { margin: 18px 0 0; padding: 0; list-style: none; }
.article-toc li + li { margin-top: 12px; }
.article-toc a { display: inline-block; color: var(--article-muted); font-size: .78rem; line-height: 1.5; transition: color .16s ease, transform .1s ease-out; }
.article-toc a:hover { color: var(--article-blue); }
.article-answer { margin-bottom: 56px; padding: 30px 32px; border-radius: 24px; background: var(--article-ink); color: white; }
.article-answer strong { color: #65b1ff; font-size: .72rem; letter-spacing: .1em; }
.article-answer p { margin: 14px 0 0; font-size: clamp(1.08rem, 2vw, 1.35rem); font-weight: 700; line-height: 1.65; letter-spacing: -.015em; }
.article-prose { color: #29292d; font-size: 1.03rem; line-height: 1.9; }
.article-prose > :first-child { margin-top: 0; }
.article-prose h2 { margin: 4.5rem 0 1.2rem; color: var(--article-ink); font-size: clamp(1.9rem, 3.6vw, 3rem); line-height: 1.12; letter-spacing: -.045em; }
.article-prose h3 { margin: 2.8rem 0 1rem; color: var(--article-ink); font-size: 1.35rem; line-height: 1.3; letter-spacing: -.025em; }
.article-prose p, .article-prose ul, .article-prose ol, .article-prose blockquote, .article-prose table { margin: 1.25rem 0; }
.article-prose strong { color: var(--article-ink); font-weight: 760; }
.article-prose a { color: var(--article-blue); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: .22em; }
.article-prose li + li { margin-top: .55rem; }
.article-prose blockquote { padding: 4px 0 4px 24px; color: var(--article-muted); border-left: 3px solid var(--article-blue); }
.article-prose table { width: 100%; border-collapse: collapse; font-size: .9rem; }
.article-prose th, .article-prose td { padding: 14px; border-bottom: 1px solid var(--article-line); text-align: left; vertical-align: top; }
.article-prose th { color: var(--article-ink); }
.article-prose code { padding: .14em .4em; border-radius: 6px; background: rgba(0,0,0,.06); font-size: .9em; }
.article-related { padding-bottom: 110px; }
.article-all-link { color: var(--article-blue); font-weight: 750; }
.article-footer { width: var(--article-width); margin: 0 auto; display: flex; justify-content: space-between; align-items: center; gap: 40px; padding: 42px 0 120px; border-top: 1px solid var(--article-line); }
.article-footer p { max-width: 620px; margin: 0; color: var(--article-muted); font-size: .75rem; line-height: 1.7; text-align: right; }

@media (max-width: 800px) {
  :root { --article-width: min(100% - 40px, 680px); }
  .site-head { min-height: 60px; padding: 0 20px; }
  .site-nav > a:not(.contact-link) { display: none; }
  .site-nav { gap: 6px; }
  .site-nav .contact-link { padding: 0 4px; border: 0; }
  .articles-hero { min-height: 430px; padding: 94px 0 52px; }
  .articles-hero h1, .article-header h1 { letter-spacing: -.055em; }
  .article-index-section, .article-related { padding: 56px 0 76px; }
  .article-section-label, .article-related > div:first-child { grid-template-columns: 44px 1fr; }
  .article-grid { grid-template-columns: 1fr; }
  .article-card-link { min-height: 300px; }
  .article-header { padding: 78px 0 52px; }
  .article-back { margin-bottom: 38px; }
  .article-layout { grid-template-columns: 1fr; gap: 36px; padding: 46px 0 80px; }
  .article-layout aside:empty { display: none; }
  .article-toc { position: static; padding-bottom: 24px; border-bottom: 1px solid var(--article-line); }
  .article-answer { padding: 25px 24px; border-radius: 20px; }
  .article-prose { font-size: 1rem; line-height: 1.82; }
  .article-prose table { display: block; overflow-x: auto; }
  .article-footer { display: block; padding-bottom: 92px; }
  .article-footer p { margin-top: 24px; text-align: left; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; }
}

@media (prefers-reduced-transparency: reduce) {
  .site-head { background: #111210; -webkit-backdrop-filter: none; backdrop-filter: none; }
}

@media (prefers-contrast: more) {
  .article-card { border: 1px solid var(--article-ink); }
  .site-head { background: #000; }
}