:root {
  --brand: #b9273d;
  --brand-hover: #971c30;
  --ink: #252a2c;
  --secondary: #576363;
  --muted: #657171;
  --line: #dce1e0;
  --surface: #f4f7f6;
  --white: #fff;
  --green: #14766d;
  --red: #b9273d;
  --tint: #fcf2f3;
  --radius: 6px;
}
* { box-sizing: border-box; letter-spacing: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 110px; }
body { margin: 0; background: var(--white); color: var(--ink); font: 16px/1.75 "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif; }
img { display: block; max-width: 100%; }
button, input { font: inherit; }
button, a { touch-action: manipulation; -webkit-tap-highlight-color: transparent; }
a { color: inherit; text-decoration: none; }
a:hover { color: var(--brand); }
button { cursor: pointer; }
input { min-width: 0; }
:focus-visible { outline: 3px solid var(--green); outline-offset: 4px; }
h1, h2, h3, p { margin: 0; }
h1, h2, h3 { color: var(--ink); line-height: 1.45; overflow-wrap: anywhere; }
h1 { font-size: 36px; font-weight: 700; }
h2 { font-size: 26px; font-weight: 700; }
h3 { font-size: 19px; font-weight: 700; }
ul, ol { padding-left: 22px; }
hr { margin: 28px 0; border: 0; border-top: 1px solid var(--line); }
.container { width: min(1240px, calc(100% - 64px)); margin-inline: auto; }
.icon { display: inline-flex; align-items: center; justify-content: center; width: 20px; height: 20px; flex: 0 0 20px; vertical-align: middle; }
.icon svg { width: 100%; height: 100%; stroke-width: 1.8; }
.icon-button { display: inline-flex; justify-content: center; align-items: center; width: 44px; height: 44px; flex: 0 0 44px; border: 0; border-radius: 4px; background: transparent; color: var(--ink); }
.icon-button:hover { background: var(--surface); color: var(--brand); }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.skip-link { position: fixed; top: -120px; left: 16px; z-index: 100; padding: 10px 18px; background: var(--white); border: 2px solid var(--brand); }
.skip-link:focus { top: 12px; }
.utility-bar { background: var(--surface); border-top: 3px solid var(--brand); color: var(--secondary); font-size: 12px; }
.utility-inner { display: flex; align-items: center; justify-content: space-between; gap: 20px; min-height: 34px; }
.utility-divider { padding-inline: 12px; color: #9da6a5; }
.utility-inner a { display: inline-flex; align-items: center; gap: 6px; min-height: 32px; }
.utility-inner .icon { width: 14px; height: 14px; flex-basis: 14px; }
.site-header { position: sticky; top: 0; z-index: 30; background: var(--white); border-bottom: 1px solid var(--line); }
.header-inner { position: relative; min-height: 88px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; flex: 0 0 auto; }
.brand img { width: 260px; height: 52px; }
.site-nav { display: flex; align-items: center; gap: 23px; font-size: 14px; }
.site-nav > a:not(.button):not(.icon-button) { position: relative; display: inline-flex; align-items: center; min-height: 48px; white-space: nowrap; }
.site-nav > a.is-active { color: var(--brand); font-weight: 700; }
.site-nav > a.is-active::after { content: ""; position: absolute; bottom: -20px; left: 0; right: 0; height: 3px; background: var(--brand); }
.nav-search { margin-inline: -10px; }
.nav-toggle, .menu-close { display: none; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 46px; padding: 10px 20px; border: 1px solid transparent; border-radius: 4px; font-size: 14px; font-weight: 600; text-align: center; transition: background .18s, color .18s, border-color .18s; }
.button-primary { background: var(--brand); color: var(--white); }
.button-primary:hover { background: var(--brand-hover); color: var(--white); }
.button-secondary { background: var(--white); color: var(--ink); border-color: #b8c2bf; }
.button-secondary:hover { color: var(--brand); border-color: var(--brand); }
.nav-download { padding-inline: 14px; }
.text-link { display: inline-flex; align-items: center; gap: 7px; min-height: 36px; color: var(--brand); font-size: 14px; font-weight: 600; }
.text-link .icon { width: 17px; height: 17px; flex-basis: 17px; }
.portal-intro { padding: 40px 0 0; background: var(--surface); border-bottom: 1px solid var(--line); }
.intro-meta { display: flex; align-items: center; gap: 18px; color: var(--muted); font-size: 12px; margin-bottom: 18px; }
.edition-mark { color: var(--green); font-size: 13px; font-weight: 600; }
.portal-intro h1 { font-size: 40px; }
.brand-name-line { display: inline; }
.intro-description { margin-top: 12px; color: var(--secondary); font-size: 18px; }
.search-form { max-width: 760px; margin-top: 24px; }
.search-form label:not(.sr-only) { display: block; color: var(--secondary); font-size: 14px; margin-bottom: 8px; }
.search-field { display: flex; align-items: center; gap: 12px; padding: 5px; background: var(--white); border: 1px solid #acb9b5; border-radius: 5px; }
.search-field > span { display: inline-flex; margin-left: 12px; color: var(--muted); }
.search-field input { flex: 1; width: 100%; min-height: 44px; padding: 4px 0; border: 0; border-radius: 0; background: transparent; color: var(--ink); font-size: 16px; }
.search-field input:focus { outline: 0; }
.search-field:focus-within { outline: 2px solid var(--green); outline-offset: 2px; }
.search-field input::placeholder { color: var(--muted); opacity: 1; }
.search-field button { flex-shrink: 0; }
.search-suggestions { display: flex; align-items: center; flex-wrap: wrap; gap: 2px 22px; margin-top: 8px; color: var(--muted); font-size: 12px; }
.search-suggestions a { display: inline-flex; align-items: center; min-height: 36px; color: var(--secondary); text-decoration: underline; text-underline-offset: 4px; text-decoration-color: #c2ccca; }
.search-suggestions a:hover { color: var(--brand); }
.identity-note { display: flex; align-items: center; gap: 10px; margin-top: 26px; padding-block: 15px; border-top: 1px solid var(--line); color: var(--secondary); font-size: 12px; }
.identity-note > .icon { color: var(--green); }
.identity-note > a { display: inline-flex; align-items: center; margin-left: auto; white-space: nowrap; }
.identity-note a .icon { width: 16px; height: 16px; flex-basis: 16px; }
.topic-index { padding: 32px 0 38px; border-bottom: 1px solid var(--line); }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 24px; }
.section-heading p, .section-description { margin-top: 8px; color: var(--secondary); font-size: 14px; }
.topic-index h2 { font-size: 22px; }
.index-total { color: var(--muted); font-size: 12px; }
.topic-grid { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); border: 1px solid var(--line); border-radius: 6px; overflow: hidden; }
.topic-entry { display: flex; flex-direction: column; min-width: 0; padding: 22px; border-right: 1px solid var(--line); transition: background .18s; }
.topic-entry:last-child { border-right: 0; }
.topic-entry:hover { background: var(--surface); }
.topic-entry-top { display: flex; align-items: center; justify-content: space-between; margin-bottom: 15px; }
.topic-entry-top small { font-size: 12px; color: var(--muted); }
.topic-symbol, .resource-symbol { display: inline-flex; align-items: center; justify-content: center; color: var(--brand); background: var(--tint); border-radius: 4px; flex-shrink: 0; }
.topic-symbol { width: 40px; height: 40px; }
.resource-symbol { width: 52px; height: 52px; }
.topic-symbol .icon { width: 23px; height: 23px; flex-basis: 23px; }
.resource-symbol .icon { width: 28px; height: 28px; flex-basis: 28px; }
.symbol-probability, .symbol-data-reading { color: var(--green); background: #eaf4f1; }
.topic-entry h3 { font-size: 17px; margin-bottom: 9px; }
.topic-entry p { color: var(--secondary); font-size: 13px; line-height: 1.85; margin-bottom: 18px; }
.topic-entry-link { display: flex; align-items: center; gap: 8px; margin-top: auto; color: var(--brand); font-size: 12px; font-weight: 600; }
.topic-entry-link .icon { width: 15px; height: 15px; flex-basis: 15px; }
.section { padding: 48px 0; }
.section-muted, .keyword-section { background: var(--surface); }
.section-kicker, .eyebrow { display: block; margin-bottom: 9px; color: var(--green); font-size: 13px; font-weight: 600; }
.article-grid, .resource-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; }
.article-card { min-width: 0; background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.article-card-image { position: relative; display: block; aspect-ratio: 2.12; overflow: hidden; background: var(--surface); }
.article-card-image img { width: 100%; height: 100%; object-fit: cover; }
.image-category { position: absolute; left: 16px; bottom: 14px; padding: 3px 9px; background: var(--white); color: var(--ink); border-radius: 3px; font-size: 12px; }
.article-card-body { padding: 22px; }
.article-meta { display: flex; align-items: center; flex-wrap: wrap; gap: 12px; color: var(--muted); font-size: 12px; }
.article-meta > span { display: inline-flex; align-items: center; gap: 4px; }
.article-meta .icon { width: 14px; height: 14px; flex-basis: 14px; }
.article-card h3 { margin-top: 12px; font-size: 18px; line-height: 1.65; }
.article-card-body > p { margin: 12px 0 16px; color: var(--secondary); font-size: 14px; line-height: 1.85; }
.keyword-section { border-block: 1px solid var(--line); }
.keyword-layout { display: grid; grid-template-columns: 240px minmax(0,1fr); gap: 48px; align-items: start; }
.keyword-layout > div:first-child > .text-link { margin-top: 20px; }
.keyword-index { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 0 28px; }
.keyword-index a { display: flex; align-items: center; justify-content: space-between; gap: 8px; min-height: 47px; padding-block: 10px; border-bottom: 1px solid var(--line); font-size: 13px; overflow-wrap: anywhere; }
.keyword-index .icon { width: 14px; height: 14px; flex-basis: 14px; color: var(--muted); }
.content-layout { display: grid; grid-template-columns: minmax(0,1fr) 290px; gap: 48px; align-items: start; }
.article-list { min-width: 0; }
.compact-heading { align-items: center; margin-bottom: 20px; }
.compact-heading h2 { font-size: 24px; }
.compact-article { display: grid; grid-template-columns: 86px minmax(0,1fr) auto 18px; align-items: center; gap: 16px; min-height: 79px; padding-block: 12px; border-bottom: 1px solid var(--line); }
.compact-article:first-child { border-top: 1px solid var(--line); }
.compact-article h3 { font-size: 15px; line-height: 1.8; }
.article-category { color: var(--green); font-size: 12px; }
.compact-article time { color: var(--muted); font-size: 12px; white-space: nowrap; }
.compact-article > .icon { width: 16px; height: 16px; flex-basis: 16px; color: var(--muted); }
.reading-path { border-left: 1px solid var(--line); padding-left: 28px; }
.reading-path h2 { font-size: 21px; }
.reading-path ol { padding: 0; margin: 16px 0; list-style: none; }
.reading-path li a { display: flex; align-items: center; gap: 12px; padding-block: 20px; border-bottom: 1px solid var(--line); }
.reading-path li a > span { color: var(--brand); font-size: 13px; }
.reading-path strong { display: block; font-size: 15px; }
.reading-path small { display: block; color: var(--muted); font-size: 12px; margin-top: 3px; }
.reading-path .icon { margin-left: auto; width: 16px; height: 16px; flex-basis: 16px; }
.download-band { padding-block: 32px; background: #eef5f2; border-block: 1px solid var(--line); }
.download-band-inner, .download-band-title { display: flex; align-items: center; gap: 24px; }
.download-band-inner { justify-content: space-between; }
.download-band-title > .icon { width: 36px; height: 36px; flex-basis: 36px; color: var(--green); }
.download-band h2 { font-size: 23px; }
.download-band p { margin-top: 7px; color: var(--secondary); font-size: 14px; }
.page-hero { padding: 24px 0 38px; background: var(--surface); border-bottom: 1px solid var(--line); }
.breadcrumb { display: flex; align-items: center; flex-wrap: wrap; gap: 9px; margin-bottom: 28px; color: var(--muted); font-size: 12px; overflow-wrap: anywhere; }
.page-hero h1 { max-width: 920px; }
.page-hero p:not(.eyebrow) { margin-top: 14px; max-width: 800px; color: var(--secondary); }
.category-heading { display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.category-heading .button { flex-shrink: 0; }
.filter-tabs { display: flex; align-items: center; flex-wrap: wrap; gap: 8px 26px; padding-bottom: 16px; margin-bottom: 28px; border-bottom: 1px solid var(--line); font-size: 14px; }
.filter-tabs a { display: inline-flex; align-items: center; gap: 8px; min-height: 44px; border-bottom: 2px solid transparent; }
.filter-tabs .is-active { color: var(--brand); border-color: var(--brand); font-weight: 600; }
.filter-tabs a > span { color: var(--muted); font-size: 12px; }
.inline-assurances { display: flex; flex-wrap: wrap; gap: 12px 24px; margin-top: 24px; color: var(--secondary); font-size: 13px; }
.inline-assurances > span { display: inline-flex; align-items: center; gap: 7px; }
.inline-assurances .icon { color: var(--green); width: 17px; height: 17px; flex-basis: 17px; }
.resource-card { display: flex; flex-direction: column; min-width: 0; padding: 26px; background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); }
.resource-card:hover { border-color: #98b8b0; }
.resource-heading { display: flex; align-items: start; justify-content: space-between; margin-bottom: 20px; }
.tag { display: inline-flex; padding: 3px 9px; border-radius: 3px; background: var(--tint); color: var(--brand); font-size: 12px; }
.tag-green { background: #eaf4f1; color: var(--green); }
.resource-card > p { margin-top: 12px; font-size: 14px; color: var(--secondary); }
.resource-features { display: grid; gap: 9px; list-style: none; padding: 0; margin: 22px 0; font-size: 13px; color: var(--secondary); }
.resource-features li { display: flex; align-items: center; gap: 8px; }
.resource-features .icon { color: var(--green); width: 16px; height: 16px; flex-basis: 16px; }
.resource-footer { display: flex; align-items: center; justify-content: space-between; gap: 12px; border-top: 1px solid var(--line); padding-top: 16px; margin-top: auto; }
.resource-footer > span { font-size: 12px; color: var(--muted); }
.download-link { display: inline-flex; align-items: center; gap: 6px; min-height: 44px; color: var(--brand); font-size: 14px; font-weight: 600; }
.download-note { display: flex; align-items: start; gap: 16px; margin-top: 36px; padding-top: 26px; border-top: 1px solid var(--line); }
.download-note > .icon { color: var(--green); margin-top: 4px; }
.download-note h2 { font-size: 18px; margin-bottom: 8px; }
.download-note p { color: var(--secondary); font-size: 14px; }
.list-item { display: grid; grid-template-columns: 180px minmax(0,1fr); gap: 24px; padding-block: 28px; border-bottom: 1px solid var(--line); }
.list-item:first-child { padding-top: 0; }
.list-image { display: block; height: 134px; border-radius: 4px; overflow: hidden; }
.list-image img { width: 100%; height: 100%; object-fit: cover; }
.list-item h2 { font-size: 21px; line-height: 1.6; margin: 8px 0; }
.list-item p { color: var(--secondary); font-size: 14px; }
.list-item .text-link { margin-top: 10px; }
.topic-sidebar { padding-left: 26px; border-left: 1px solid var(--line); }
.topic-sidebar h2 { font-size: 22px; margin: 16px 0 12px; }
.topic-sidebar h3 { font-size: 17px; margin-bottom: 10px; }
.topic-sidebar p { color: var(--secondary); font-size: 14px; margin-bottom: 18px; }
.topic-sidebar .button { width: 100%; padding-inline: 10px; }
.result-count { font-size: 13px; color: var(--muted); }
.empty-state { display: flex; flex-direction: column; align-items: center; gap: 16px; text-align: center; padding: 48px 16px; }
.empty-state > .icon { width: 40px; height: 40px; color: var(--muted); }
.empty-state p { color: var(--secondary); }
.article-page { padding: 24px 0 64px; }
.article-layout { display: grid; grid-template-columns: minmax(0,820px) 260px; justify-content: space-between; gap: 60px; align-items: start; }
.article-main { min-width: 0; }
.article-header h1 { font-size: 34px; line-height: 1.5; margin-top: 12px; }
.article-deck { margin-top: 18px; color: var(--secondary); font-size: 17px; line-height: 1.9; }
.article-byline { display: flex; align-items: center; flex-wrap: wrap; gap: 10px 20px; padding: 22px 0; font-size: 12px; color: var(--muted); }
.article-byline > span { display: inline-flex; align-items: center; gap: 5px; }
.article-byline .icon { width: 14px; height: 14px; flex-basis: 14px; }
.article-cover { margin: 0 0 30px; }
.article-cover img { width: 100%; height: auto; aspect-ratio: 2.15; object-fit: cover; border-radius: 4px; }
.article-cover figcaption { padding-top: 8px; font-size: 12px; color: var(--muted); }
.article-summary { padding: 22px 24px; margin-bottom: 34px; border-left: 3px solid var(--green); background: var(--surface); }
.article-summary h2 { display: flex; align-items: center; gap: 9px; font-size: 18px; }
.article-summary .icon { color: var(--green); }
.article-summary ul { color: var(--secondary); font-size: 15px; margin-bottom: 0; }
.article-summary li + li { margin-top: 6px; }
.article-body { color: #3e4747; font-size: 17px; line-height: 2; }
.article-body h2 { font-size: 23px; margin: 34px 0 16px; scroll-margin-top: 110px; }
.article-body > h2:first-child { margin-top: 0; }
.article-body p { margin-bottom: 20px; }
.article-example { padding: 22px 24px 2px; margin-block: 30px; background: var(--surface); border-left: 3px solid var(--green); scroll-margin-top: 110px; }
.article-example .tag { color: var(--green); background: #e2eeea; }
.article-example h2 { font-size: 21px; margin-top: 10px; }
.article-callout { display: flex; align-items: start; gap: 12px; margin-block: 30px; padding-block: 20px; border-block: 1px solid var(--line); font-size: 14px; color: var(--secondary); }
.article-callout > .icon { color: var(--green); margin-top: 5px; }
.article-callout p { margin: 0; }
.article-download { display: flex; align-items: center; justify-content: space-between; gap: 24px; border-top: 1px solid var(--line); padding-top: 28px; }
.article-download p { margin-top: 8px; font-size: 14px; color: var(--secondary); }
.article-download .button { flex-shrink: 0; }
.article-aside { position: sticky; top: 116px; }
.article-aside h2 { font-size: 18px; margin-bottom: 16px; }
.article-toc h2 { display: flex; align-items: center; gap: 8px; }
.article-toc > a { display: block; padding: 9px 0; border-bottom: 1px solid var(--line); color: var(--secondary); font-size: 14px; }
.article-toc > a:hover { color: var(--brand); }
.related-articles { padding-top: 26px; margin-top: 24px; border-top: 1px solid var(--line); }
.related-link { display: flex; align-items: start; justify-content: space-between; gap: 10px; padding-bottom: 18px; font-size: 14px; }
.related-link .icon { width: 16px; height: 16px; flex-basis: 16px; margin-top: 4px; color: var(--muted); }
.prose-layout, .disclaimer-layout { display: grid; grid-template-columns: minmax(0,780px) 280px; justify-content: space-between; align-items: start; gap: 60px; }
.prose { min-width: 0; font-size: 17px; line-height: 2; }
.prose h2 { font-size: 24px; margin: 30px 0 14px; }
.prose h2:first-child { margin-top: 0; }
.prose p { margin-bottom: 20px; color: var(--secondary); }
.prose a { color: var(--brand); text-decoration: underline; text-underline-offset: 4px; }
.check-list { color: var(--secondary); }
.side-note { padding-left: 26px; border-left: 3px solid var(--green); }
.side-note h2 { font-size: 24px; margin-bottom: 16px; }
.side-note p { color: var(--secondary); font-size: 15px; }
.disclaimer-card { border: 1px solid var(--line); padding: 28px; border-radius: var(--radius); }
.disclaimer-mark { display: block; color: var(--brand); font-size: 36px; font-weight: 700; }
.disclaimer-card h2 { font-size: 23px; margin: 12px 0; }
.disclaimer-card p { color: var(--secondary); font-size: 15px; }
.faq-list { max-width: 960px; }
.faq-item { border-bottom: 1px solid var(--line); padding-block: 18px; }
.faq-item:first-child { border-top: 1px solid var(--line); }
.faq-item summary { display: grid; grid-template-columns: 30px minmax(0,1fr) 20px; align-items: center; gap: 16px; min-height: 44px; list-style: none; cursor: pointer; font-size: 18px; font-weight: 600; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary > span { color: var(--brand); font-size: 13px; font-weight: 400; }
.faq-item summary b { color: var(--brand); font-size: 22px; font-weight: 400; }
.faq-item[open] summary b { transform: rotate(45deg); }
.faq-item > p { margin-top: 14px; padding: 0 36px 8px 46px; color: var(--secondary); line-height: 1.95; }
.site-footer { padding: 42px 0 0; background: var(--surface); border-top: 1px solid var(--line); }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.2fr; gap: 40px; padding-bottom: 34px; }
.footer-brand-block > p { margin-top: 16px; color: var(--secondary); font-size: 14px; }
.footer-domain { display: inline-flex; align-items: center; gap: 8px; min-height: 44px; color: var(--brand); font-size: 14px; margin-top: 8px; }
.footer-domain .icon { width: 16px; height: 16px; flex-basis: 16px; }
.footer-column h2 { font-size: 15px; margin-bottom: 14px; }
.footer-column > a { display: block; min-height: 36px; padding-block: 5px; font-size: 13px; color: var(--secondary); }
.footer-column > a:hover { color: var(--brand); }
.footer-disclaimer { font-size: 12px; color: var(--secondary); margin-top: 12px; }
.footer-bottom { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding-block: 20px; border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; }
.back-top { position: fixed; right: 22px; bottom: 22px; background: var(--white); border: 1px solid var(--line); opacity: 0; visibility: hidden; pointer-events: none; z-index: 20; }
.back-top.is-visible { opacity: 1; visibility: visible; pointer-events: auto; }
@media (max-width: 1200px) {
  .site-nav { gap: 15px; font-size: 13px; }
  .brand img { width: 240px; height: 48px; }
  .topic-entry { padding: 18px; }
  .keyword-layout { grid-template-columns: 210px minmax(0,1fr); gap: 32px; }
  .keyword-index { gap: 0 20px; }
}
@media (max-width: 1100px) {
  .header-inner { min-height: 78px; }
  .nav-toggle { display: inline-flex; margin-left: auto; }
  .nav-toggle[aria-expanded="true"] .menu-open { display: none; }
  .nav-toggle[aria-expanded="true"] .menu-close { display: inline-flex; }
  .site-nav { display: none; position: absolute; top: 100%; left: -32px; right: -32px; padding: 16px 32px 24px; background: var(--white); border-bottom: 1px solid var(--line); flex-wrap: wrap; align-items: center; gap: 8px 26px; font-size: 14px; }
  .site-nav.is-open { display: flex; }
  .site-nav > a.is-active::after { bottom: 0; }
  .nav-search { margin: 0; }
  .topic-grid { grid-template-columns: repeat(3,minmax(0,1fr)); }
  .topic-entry:nth-child(3) { border-right: 0; }
  .topic-entry:nth-child(n+4) { border-top: 1px solid var(--line); }
  .article-layout { grid-template-columns: minmax(0,1fr) 225px; gap: 36px; }
  .content-layout { grid-template-columns: minmax(0,1fr) 250px; gap: 32px; }
  .compact-article { grid-template-columns: 82px minmax(0,1fr) 16px; gap: 12px; }
  .compact-article time { display: none; }
  .keyword-layout { grid-template-columns: minmax(0,1fr); gap: 24px; }
  .keyword-layout > div:first-child > .text-link { margin-top: 10px; }
  .resource-card { padding: 22px; }
  .article-download { flex-wrap: wrap; }
}
@media (max-width: 800px) {
  .container { width: calc(100% - 40px); }
  .portal-intro h1 { font-size: 34px; }
  .intro-description { font-size: 17px; }
  .identity-note { align-items: start; }
  .identity-note > .icon { margin-top: 2px; }
  .identity-note > a { display: none; }
  .topic-entry { padding: 20px; }
  .article-grid, .resource-grid { grid-template-columns: repeat(2,minmax(0,1fr)); gap: 20px; }
  .feature-section .article-card:last-child { grid-column: 1 / -1; display: grid; grid-template-columns: 1fr 1fr; }
  .feature-section .article-card:last-child .article-card-image { height: 100%; aspect-ratio: auto; }
  .content-layout, .article-layout, .prose-layout, .disclaimer-layout { grid-template-columns: minmax(0,1fr); gap: 36px; }
  .reading-path, .topic-sidebar { border-left: 0; border-top: 1px solid var(--line); padding: 28px 0 0; }
  .reading-path ol { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 18px; }
  .reading-path li a { align-items: start; height: 100%; gap: 8px; }
  .reading-path li .icon { display: none; }
  .keyword-index { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .download-band-inner { align-items: start; flex-wrap: wrap; }
  .article-aside { position: static; border-top: 1px solid var(--line); padding-top: 28px; }
  .article-toc { display: none; }
  .related-articles { border: 0; padding-top: 0; margin-top: 0; }
  .article-header h1 { font-size: 30px; }
  .footer-grid { grid-template-columns: repeat(3,minmax(0,1fr)); gap: 30px; }
  .footer-brand-block { grid-column: 1 / -1; }
  .category-heading { align-items: start; flex-direction: column; gap: 22px; }
  .topic-sidebar .button { width: auto; }
  .side-note { padding-left: 22px; }
}
@media (max-width: 540px) {
  .container { width: calc(100% - 36px); }
  .utility-inner { min-height: 30px; font-size: 11px; }
  .utility-inner > a { display: none; }
  .utility-divider { padding-inline: 8px; }
  .header-inner { min-height: 72px; gap: 12px; }
  .brand img { width: 235px; height: 47px; }
  .site-nav { left: -18px; right: -18px; padding: 12px 20px 20px; flex-direction: column; align-items: stretch; gap: 0; font-size: 15px; }
  .site-nav > a:not(.button):not(.icon-button) { min-height: 44px; }
  .site-nav > a.is-active::after { width: 22px; right: auto; bottom: 2px; }
  .nav-search { display: none; }
  .nav-download { margin-top: 12px; align-self: start; }
  .portal-intro { padding-top: 26px; }
  .intro-meta { flex-wrap: wrap; gap: 4px 14px; margin-bottom: 16px; font-size: 11px; }
  .edition-mark { font-size: 12px; }
  .portal-intro h1 { font-size: 28px; line-height: 1.5; }
  .brand-name-line { display: block; }
  .intro-description { font-size: 16px; margin-top: 12px; }
  .search-form { margin-top: 22px; }
  .search-field { gap: 7px; padding: 4px; }
  .search-field > span { margin-left: 6px; }
  .search-field > span .icon { width: 17px; height: 17px; flex-basis: 17px; }
  .search-field .button { padding-inline: 12px; min-height: 44px; }
  .search-field .button > .icon { display: none; }
  .portal-search .button span:last-child { font-size: 13px; }
  .search-suggestions { gap: 2px 15px; font-size: 12px; margin-top: 10px; }
  .search-suggestions > span { flex-basis: 100%; }
  .search-suggestions a { min-height: 36px; }
  .identity-note { margin-top: 18px; padding-block: 14px; font-size: 12px; line-height: 1.9; }
  .identity-note > .icon { margin-top: 4px; width: 18px; height: 18px; flex-basis: 18px; }
  .topic-index { padding-block: 26px; }
  .section-heading { align-items: start; gap: 16px; margin-bottom: 20px; }
  .section-heading h2, .topic-index h2 { font-size: 22px; }
  .section-heading > .text-link { white-space: nowrap; font-size: 12px; }
  .index-total { font-size: 11px; padding-top: 5px; }
  .topic-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .topic-entry { padding: 18px 16px; }
  .topic-entry:nth-child(3) { border-right: 1px solid var(--line); border-top: 1px solid var(--line); }
  .topic-entry:nth-child(even) { border-right: 0; }
  .topic-entry:last-child { grid-column: 1 / -1; border-right: 0; }
  .topic-entry h3 { font-size: 17px; }
  .topic-entry p { font-size: 13px; margin-bottom: 14px; }
  .topic-entry-top { margin-bottom: 12px; }
  .section { padding-block: 34px; }
  .article-grid, .resource-grid { grid-template-columns: minmax(0,1fr); }
  .feature-section .article-card:last-child { display: block; grid-column: auto; }
  .feature-section .article-card:last-child .article-card-image { height: auto; aspect-ratio: 2.12; }
  .article-card-body { padding: 20px; }
  .article-card h3 { font-size: 19px; }
  .keyword-layout { gap: 20px; }
  .keyword-index { column-gap: 16px; }
  .keyword-index a { font-size: 12px; line-height: 1.8; min-height: 48px; gap: 4px; }
  .keyword-index .icon { width: 12px; height: 12px; flex-basis: 12px; }
  .compact-article { grid-template-columns: minmax(0,1fr) 18px; gap: 6px; padding-block: 16px; }
  .compact-article > .article-category { grid-column: 1 / -1; }
  .reading-path ol { display: block; }
  .reading-path li a { align-items: center; gap: 12px; }
  .reading-path li .icon { display: inline-flex; }
  .download-band { padding-block: 28px; }
  .download-band-title { align-items: start; gap: 14px; }
  .download-band-title > .icon { width: 26px; height: 26px; flex-basis: 26px; margin-top: 4px; }
  .download-band h2 { font-size: 21px; }
  .download-band-inner > .button { margin-left: 40px; }
  .page-hero { padding-block: 20px 30px; }
  .breadcrumb { font-size: 12px; gap: 6px; margin-bottom: 22px; }
  .page-hero h1 { font-size: 28px; }
  .page-hero p:not(.eyebrow) { font-size: 16px; }
  .inline-assurances { font-size: 12px; gap: 8px 16px; }
  .filter-tabs { font-size: 13px; gap: 4px 22px; }
  .resource-card { padding: 24px; }
  .list-item { grid-template-columns: minmax(0,1fr); gap: 18px; }
  .list-image { height: auto; aspect-ratio: 2.12; }
  .list-item h2 { font-size: 21px; }
  .list-item p { font-size: 16px; }
  .result-count { font-size: 12px; white-space: nowrap; }
  .article-page { padding-top: 20px; }
  .article-header h1 { font-size: 27px; }
  .article-deck { font-size: 16px; }
  .article-byline { gap: 8px 14px; }
  .article-cover img { aspect-ratio: 1.9; }
  .article-cover figcaption { font-size: 12px; }
  .article-summary { padding: 18px; }
  .article-body { font-size: 17px; }
  .article-body h2 { font-size: 22px; }
  .article-example { padding: 20px 18px 2px; }
  .article-download { align-items: start; flex-direction: column; }
  .prose { font-size: 17px; }
  .prose h2 { font-size: 23px; }
  .faq-item summary { grid-template-columns: 24px minmax(0,1fr) 18px; gap: 9px; font-size: 17px; }
  .faq-item > p { padding-left: 33px; padding-right: 0; font-size: 16px; }
  .footer-grid { grid-template-columns: repeat(2,minmax(0,1fr)); gap: 28px 22px; }
  .footer-column:last-child { grid-column: 1 / -1; }
  .footer-column > a { min-height: 40px; }
  .footer-bottom { flex-direction: column; align-items: start; gap: 8px; }
  .back-top { right: 12px; bottom: 14px; }
}
@media (max-width: 360px) {
  .brand img { width: 215px; height: 43px; }
  .portal-intro h1 { font-size: 26px; }
  .search-field > span { display: none; }
  .search-field input { padding-left: 6px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}