.knowledge-home-intro { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(310px, .65fr); gap: 54px; align-items: end; padding: 18px 0 38px; }
.knowledge-home-intro h1 { max-width: 760px; margin: 0; font-family: var(--serif); font-size: clamp(36px, 4.2vw, 60px); line-height: 1.08; letter-spacing: -.035em; }
.knowledge-home-intro > div > p { max-width: 700px; margin: 20px 0 0; color: var(--muted); font-size: 14px; line-height: 1.85; }
.knowledge-home-principle { padding: 23px 25px; border: 1px solid #a8c3df; background: #f7fbff; }
.knowledge-home-principle strong { color: #165acb; font-size: 13px; }
.knowledge-home-principle p { margin: 9px 0 0; color: #405775; font-size: 12px; line-height: 1.8; }
.knowledge-start-paths { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.knowledge-start-paths a { min-width: 0; padding: 20px 22px; color: inherit; text-decoration: none; }
.knowledge-start-paths a + a { border-left: 1px solid var(--line); }
.knowledge-start-paths span { color: var(--teal); font: 700 10px var(--mono); }
.knowledge-start-paths strong { display: block; margin-top: 8px; font-family: var(--serif); font-size: 16px; }
.knowledge-start-paths small { display: block; margin-top: 6px; color: var(--muted); font-size: 10px; line-height: 1.6; }
.knowledge-start-paths a:hover, .knowledge-start-paths a:focus-visible { background: #f4f9fd; outline: none; }
.knowledge-search { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 16px; align-items: center; margin: 34px 0 20px; }
.knowledge-search label { position: relative; display: block; }
.knowledge-search label::before { position: absolute; left: 17px; top: 50%; width: 12px; height: 12px; border: 1.5px solid #738297; border-radius: 50%; transform: translateY(-60%); content: ''; }
.knowledge-search label::after { position: absolute; left: 28px; top: 28px; width: 6px; height: 1px; background: #738297; transform: rotate(45deg); content: ''; }
.knowledge-search input { width: 100%; height: 54px; padding: 0 18px 0 43px; border: 1px solid var(--line-strong); color: var(--ink); background: white; font: 13px var(--sans); }
.knowledge-search input:focus { border-color: var(--teal); outline: 2px solid rgba(8,127,131,.12); }
.knowledge-search span { color: var(--muted); font-size: 10px; }
.knowledge-category-list { display: grid; gap: 18px; padding-bottom: 18px; }
.knowledge-category { scroll-margin-top: 80px; display: grid; grid-template-columns: 280px minmax(0, 1fr); border: 1px solid var(--line); background: white; transition: opacity .15s ease; }
.knowledge-category.search-hidden { display: none; }
.knowledge-category-head { padding: 28px 27px; border-right: 1px solid var(--line); background: #fbfcfd; }
.knowledge-category-head > span { color: #165acb; font: 700 22px var(--mono); }
.knowledge-category-head h2 { margin: 22px 0 0; font-family: var(--serif); font-size: 25px; }
.knowledge-category-head p { margin: 9px 0 24px; color: var(--muted); font-size: 11px; line-height: 1.75; }
.knowledge-category-head > strong { color: var(--teal-dark); font-size: 10px; }
.knowledge-category-body { min-width: 0; padding: 8px 25px 15px; }
.knowledge-question-link { display: grid; grid-template-columns: 53px minmax(0, 1fr) 68px 18px; gap: 14px; align-items: center; padding: 16px 2px; border-bottom: 1px solid var(--line); color: inherit; text-decoration: none; }
.knowledge-question-link[hidden] { display: none; }
.knowledge-question-link > span { color: #5d7691; font: 700 9px var(--mono); }
.knowledge-question-link strong { display: block; font-family: var(--serif); font-size: 15px; }
.knowledge-question-link small { display: block; margin-top: 4px; overflow: hidden; color: var(--muted); font-size: 10px; line-height: 1.55; text-overflow: ellipsis; white-space: nowrap; }
.knowledge-question-link em { color: var(--faint); font-size: 9px; font-style: normal; text-align: right; }
.knowledge-question-link i { color: #165acb; font-size: 16px; font-style: normal; }
.knowledge-question-link:hover strong, .knowledge-question-link:focus-visible strong { color: #165acb; }
.knowledge-question-link:focus-visible { outline: 2px solid rgba(22,90,203,.18); outline-offset: 2px; }
.knowledge-category-empty { margin: 14px 0 4px; padding: 18px 0; color: var(--muted); font-size: 11px; }
.knowledge-roadmap { margin-top: 6px; }
.knowledge-roadmap summary { padding: 12px 2px; color: var(--muted); font-size: 10px; cursor: pointer; }
.knowledge-roadmap summary span { margin-left: 5px; color: var(--faint); }
.knowledge-roadmap ul { display: grid; grid-template-columns: 1fr 1fr; gap: 0 24px; margin: 0; padding: 0 0 9px; list-style: none; }
.knowledge-roadmap li { display: flex; justify-content: space-between; gap: 12px; padding: 10px 0; border-top: 1px solid #edf1f4; color: #58677a; font-size: 10px; }
.knowledge-roadmap li span { flex: 0 0 auto; color: #9aa4b0; }
.knowledge-home-note { margin: 12px 0 0; padding: 14px 16px; border-left: 2px solid var(--amber); color: var(--muted); background: #fffaf0; font-size: 10px; line-height: 1.75; }

.knowledge-article-body { --article-blue: #165acb; min-width: 320px; color: var(--ink); background: white; }
.knowledge-site-header { position: sticky; top: 0; z-index: 70; display: flex; align-items: center; justify-content: space-between; min-height: 64px; padding: 0 40px; border-bottom: 1px solid var(--line); background: rgba(255,255,255,.96); backdrop-filter: blur(14px); }
.knowledge-site-brand { display: inline-flex; align-items: center; gap: 10px; color: inherit; font-family: var(--serif); font-size: 18px; font-weight: 700; text-decoration: none; }
.knowledge-site-header nav { display: flex; gap: 28px; }
.knowledge-site-header nav a { color: var(--ink); font-size: 11px; text-decoration: none; }
.knowledge-site-header nav a:hover, .knowledge-site-header nav a:focus-visible { color: var(--article-blue); outline: none; }
.knowledge-article-page { min-height: 75vh; }
.knowledge-article-loading, .knowledge-not-found { width: min(900px, calc(100% - 48px)); margin: 90px auto; color: var(--muted); text-align: center; }
.knowledge-not-found h1 { color: var(--ink); font-family: var(--serif); font-size: 38px; }
.knowledge-not-found a { color: var(--article-blue); }
.knowledge-reading-hero { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(330px, .65fr); gap: clamp(48px, 7vw, 100px); align-items: end; width: min(1280px, calc(100% - 96px)); margin: 0 auto; padding: 74px 0 62px; }
.knowledge-breadcrumb { color: var(--muted); font-size: 11px; text-decoration: none; }
.knowledge-reading-hero h1 { max-width: 820px; margin: 35px 0 0; font-family: var(--serif); font-size: clamp(44px, 5vw, 70px); line-height: 1.08; letter-spacing: -.04em; }
.knowledge-reading-hero > div > p { max-width: 760px; margin: 22px 0 0; color: #304b6b; font-size: 18px; line-height: 1.65; }
.knowledge-reading-meta { display: flex; gap: 21px; margin-top: 25px; color: var(--article-blue); font-size: 10px; }
.knowledge-reading-hero aside { padding: 25px 27px; border: 1px solid #9abbea; background: #f8fbff; }
.knowledge-reading-hero aside strong { color: var(--article-blue); font-size: 13px; }
.knowledge-reading-hero aside p { margin: 10px 0 0; color: #405775; font-size: 13px; line-height: 1.85; }
.knowledge-reading-layout { display: grid; grid-template-columns: 220px minmax(0, 940px); gap: 58px; justify-content: center; width: min(1320px, calc(100% - 72px)); margin: 0 auto; padding: 50px 0 90px; border-top: 1px solid var(--line); }
.knowledge-reading-toc { position: sticky; top: 94px; align-self: start; display: grid; gap: 3px; padding-right: 25px; border-right: 1px solid var(--line); }
.knowledge-reading-toc > strong { margin-bottom: 13px; font-size: 13px; }
.knowledge-reading-toc a { display: grid; grid-template-columns: 30px 1fr; padding: 9px 8px; border-left: 2px solid transparent; color: #65758a; font-size: 10px; line-height: 1.45; text-decoration: none; }
.knowledge-reading-toc a:hover, .knowledge-reading-toc a:focus-visible { border-left-color: var(--article-blue); color: var(--article-blue); background: #f7faff; outline: none; }
.knowledge-reading-toc a span { font-family: var(--mono); }
.knowledge-reading-toc .checklist-link { grid-template-columns: 1fr; margin-top: 8px; color: var(--article-blue); font-weight: 700; }
.knowledge-reading-article { min-width: 0; }
.knowledge-reading-section { scroll-margin-top: 92px; padding: 14px 0 58px; }
.knowledge-reading-section + .knowledge-reading-section { padding-top: 52px; border-top: 1px solid var(--line); }
.knowledge-reading-section > header { display: grid; grid-template-columns: 42px 1fr; gap: 16px; margin-bottom: 25px; }
.knowledge-reading-section > header > span { color: var(--article-blue); font: 700 17px var(--mono); }
.knowledge-reading-section h2 { margin: 0; font-family: var(--serif); font-size: clamp(27px, 3vw, 39px); }
.knowledge-reading-section header p { margin: 8px 0 0; color: var(--muted); font-size: 12px; line-height: 1.7; }
.knowledge-reading-copy { columns: 2; column-gap: 40px; }
.knowledge-reading-copy p { margin: 0 0 16px; color: #435166; font-size: 13px; line-height: 1.9; break-inside: avoid; }
.knowledge-reading-points { display: grid; grid-template-columns: 1fr 1fr; gap: 0 28px; margin: 10px 0 0; padding: 0; border-top: 1px solid var(--line); list-style: none; }
.knowledge-reading-points li { position: relative; padding: 13px 8px 13px 18px; border-bottom: 1px solid var(--line); color: #536277; font-size: 11px; line-height: 1.6; }
.knowledge-reading-points li::before { position: absolute; left: 2px; top: 19px; width: 6px; height: 6px; border-radius: 50%; background: var(--teal); content: ''; }
.knowledge-evidence-block { margin: 8px 0 54px; padding-top: 50px; border-top: 1px solid var(--line); }
.knowledge-evidence-block > header > span { color: var(--article-blue); font: 700 9px var(--mono); letter-spacing: .15em; }
.knowledge-evidence-block > header h2 { margin: 10px 0 0; font-family: var(--serif); font-size: clamp(28px, 3vw, 40px); }
.knowledge-evidence-block > header p { margin: 9px 0 24px; color: var(--muted); font-size: 11px; line-height: 1.7; }
.knowledge-case-grid { display: grid; grid-template-columns: 1fr 1fr; border: 1px solid #b9cbe0; }
.knowledge-case-card { min-width: 0; padding: 24px 25px 26px; border-top: 4px solid #d39a25; }
.knowledge-case-card:nth-child(even) { border-left: 1px solid #cbd7e4; }
.knowledge-case-card:nth-child(n+3) { border-top-width: 1px; }
.knowledge-case-card.positive { border-top-color: #0b9b78; }.knowledge-case-card.negative { border-top-color: #c94855; }
.knowledge-case-card header { display: flex; align-items: center; justify-content: space-between; }
.knowledge-case-card header span { color: var(--muted); font-size: 9px; letter-spacing: .08em; }.knowledge-case-card header strong { color: var(--article-blue); font: 700 14px var(--mono); }
.knowledge-case-card h3 { margin: 17px 0 5px; font-family: var(--serif); font-size: 18px; }.knowledge-case-verdict { margin: 0; color: var(--teal-dark); font-size: 10px; font-weight: 700; }
.knowledge-case-card dl { display: grid; grid-template-columns: 1fr 1fr; margin: 20px 0 0; border-top: 1px solid var(--line); }
.knowledge-case-card dl div { padding: 13px 9px 12px 0; border-bottom: 1px solid var(--line); }.knowledge-case-card dl div:nth-child(even) { padding-left: 12px; border-left: 1px solid var(--line); }
.knowledge-case-card dt { color: var(--muted); font-size: 9px; }.knowledge-case-card dd { margin: 6px 0 0; font: 700 16px var(--mono); }
.knowledge-case-history { margin: 17px 0 0; color: #4d5e73; font-size: 10px; line-height: 1.7; }.knowledge-case-lesson { margin: 9px 0 0; color: var(--muted); font-size: 10px; line-height: 1.7; }.knowledge-case-lesson strong { color: var(--ink); }
.knowledge-evidence-table { margin: 42px 0 0; }
.knowledge-evidence-table > header h2 { margin: 0; font-family: var(--serif); font-size: 25px; }.knowledge-evidence-table > header p { margin: 7px 0 18px; color: var(--muted); font-size: 11px; }
.knowledge-evidence-table > div { overflow-x: auto; border: 1px solid #b9cbe0; }
.knowledge-evidence-table table { width: 100%; border-collapse: collapse; font-size: 10px; }.knowledge-evidence-table th { padding: 13px 15px; color: var(--article-blue); background: #f7faff; text-align: left; white-space: nowrap; }.knowledge-evidence-table td { padding: 14px 15px; border-top: 1px solid var(--line); color: #425268; line-height: 1.55; }.knowledge-evidence-table th + th, .knowledge-evidence-table td + td { border-left: 1px solid var(--line); }.knowledge-evidence-table td:not(:first-child):not(:last-child) { font-family: var(--mono); }
.knowledge-evidence-note { margin: 9px 0 0; color: var(--faint); font-size: 9px; line-height: 1.65; }
.knowledge-checklist { scroll-margin-top: 90px; margin-top: 8px; padding: 31px 34px; color: white; background: #102b4c; }
.knowledge-checklist > span { color: #72c9d5; font: 700 9px var(--mono); letter-spacing: .14em; }
.knowledge-checklist h2 { margin: 10px 0 20px; font-family: var(--serif); font-size: 27px; }
.knowledge-checklist ol { display: grid; grid-template-columns: 1fr 1fr; gap: 0 27px; margin: 0; padding: 0; list-style: none; }
.knowledge-checklist li { display: grid; grid-template-columns: 18px 1fr; gap: 10px; padding: 13px 0; border-top: 1px solid rgba(255,255,255,.16); color: #dce8f5; font-size: 11px; line-height: 1.6; }
.knowledge-checklist li i { width: 13px; height: 13px; margin-top: 2px; border: 1px solid #65afbd; }
.knowledge-boundary { margin-top: 22px; padding: 20px 23px; border-left: 3px solid #d89924; background: #fff9ed; }
.knowledge-boundary strong { color: #84560b; font-size: 12px; }
.knowledge-boundary p { margin: 7px 0 0; color: #75674f; font-size: 10px; line-height: 1.8; }
.knowledge-related { margin-top: 45px; }
.knowledge-related h2 { font-family: var(--serif); font-size: 24px; }
.knowledge-related a { display: grid; grid-template-columns: minmax(0, 1fr) 24px; padding: 17px 0; border-top: 1px solid var(--line); color: inherit; text-decoration: none; }
.knowledge-related a span { font-family: var(--serif); font-size: 15px; }.knowledge-related a small { grid-column: 1; margin-top: 4px; color: var(--muted); font-size: 10px; }.knowledge-related a i { grid-column: 2; grid-row: 1 / span 2; align-self: center; color: var(--article-blue); font-style: normal; }
.knowledge-site-footer { display: flex; justify-content: space-between; gap: 50px; padding: 30px 42px; border-top: 1px solid var(--line); color: var(--muted); font-size: 9px; line-height: 1.7; }.knowledge-site-footer p { max-width: 740px; margin: 0; text-align: right; }

@media (max-width: 900px) {
  .knowledge-home-intro, .knowledge-reading-hero { grid-template-columns: 1fr; gap: 28px; }
  .knowledge-start-paths { grid-template-columns: 1fr 1fr; }.knowledge-start-paths a:nth-child(3) { border-left: 0; border-top: 1px solid var(--line); }.knowledge-start-paths a:nth-child(4) { border-top: 1px solid var(--line); }
  .knowledge-category { grid-template-columns: 220px minmax(0, 1fr); }.knowledge-question-link { grid-template-columns: 45px minmax(0, 1fr) 18px; }.knowledge-question-link em { display: none; }
  .knowledge-reading-layout { grid-template-columns: 1fr; }.knowledge-reading-toc { position: static; grid-template-columns: repeat(2, 1fr); padding: 0 0 25px; border-right: 0; border-bottom: 1px solid var(--line); }.knowledge-reading-toc > strong { grid-column: 1 / -1; }
}
@media (max-width: 640px) {
  .knowledge-site-header { padding: 0 18px; }.knowledge-site-header nav a:not(:first-child) { display: none; }
  .knowledge-home-intro { padding-top: 4px; }.knowledge-home-intro h1 { font-size: 37px; }
  .knowledge-start-paths { grid-template-columns: 1fr; }.knowledge-start-paths a + a { border-top: 1px solid var(--line); border-left: 0; }
  .knowledge-search { grid-template-columns: 1fr; }.knowledge-search span { padding-left: 2px; }
  .knowledge-category { grid-template-columns: 1fr; }.knowledge-category-head { padding: 22px 20px; border-right: 0; border-bottom: 1px solid var(--line); }.knowledge-category-head h2 { margin-top: 10px; }.knowledge-category-body { padding: 4px 18px 13px; }.knowledge-question-link { grid-template-columns: 1fr 18px; padding: 16px 0; }.knowledge-question-link > span { display: none; }.knowledge-question-link small { white-space: normal; }.knowledge-roadmap ul { grid-template-columns: 1fr; }
  .knowledge-reading-hero { width: calc(100% - 36px); padding: 42px 0; }.knowledge-reading-hero h1 { margin-top: 24px; font-size: 39px; }.knowledge-reading-hero > div > p { font-size: 15px; }.knowledge-reading-meta { flex-wrap: wrap; gap: 9px 16px; }
  .knowledge-reading-layout { width: calc(100% - 36px); padding-top: 30px; }.knowledge-reading-toc { grid-template-columns: 1fr; }.knowledge-reading-copy { columns: 1; }.knowledge-reading-points, .knowledge-checklist ol { grid-template-columns: 1fr; }.knowledge-case-grid { grid-template-columns: 1fr; }.knowledge-case-card:nth-child(even) { border-left: 0; }.knowledge-case-card + .knowledge-case-card { border-top-width: 1px; }.knowledge-checklist { padding: 26px 22px; }
  .knowledge-site-footer { display: block; padding: 25px 19px; }.knowledge-site-footer p { margin-top: 9px; text-align: left; }
}