.knowledge-page { background: #f8f8f3; }

.knowledge-page .main-navigation a[aria-current="page"] {
  color: var(--green-950);
  background: var(--green-100);
}

.knowledge-hero {
  padding: clamp(62px, 8vw, 108px) 0 clamp(56px, 7vw, 92px);
  background:
    radial-gradient(circle at 88% 18%, rgba(200, 239, 121, 0.23), transparent 25%),
    linear-gradient(145deg, #fbfaf5, #eef6ee);
  border-bottom: 1px solid var(--line);
}

.breadcrumbs { margin-bottom: 38px; }
.breadcrumbs ol { display: flex; flex-wrap: wrap; gap: 8px; margin: 0; padding: 0; list-style: none; color: var(--muted); font-size: 0.9rem; }
.breadcrumbs li { display: inline-flex; align-items: center; gap: 8px; }
.breadcrumbs li:not(:last-child)::after { content: "/"; color: #91a096; }
.breadcrumbs a { min-height: 44px; display: inline-flex; align-items: center; color: var(--green-700); font-weight: 720; text-underline-offset: 4px; }
.breadcrumbs span { min-height: 44px; display: inline-flex; align-items: center; }

.knowledge-hero-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(300px, 0.45fr); gap: clamp(40px, 8vw, 110px); align-items: end; }
.knowledge-hero h1 { max-width: 900px; margin: 0; color: var(--green-950); font-size: clamp(2.65rem, 6vw, 5.2rem); font-weight: 880; letter-spacing: -0.058em; line-height: 0.99; }
.knowledge-hero .lead { max-width: 780px; margin: 26px 0 0; color: var(--muted); font-size: clamp(1.08rem, 1.5vw, 1.25rem); line-height: 1.72; }
.knowledge-meta { display: grid; gap: 10px; padding: 24px; background: rgba(255,255,255,.75); border: 1px solid var(--line); border-radius: var(--radius-md); }
.knowledge-meta span { color: var(--muted); font-size: 0.88rem; }
.knowledge-meta strong { color: var(--green-950); }

.knowledge-section { padding: clamp(64px, 8vw, 108px) 0; }
.knowledge-section-soft { background: var(--green-50); border-block: 1px solid var(--line); }
.knowledge-intro { max-width: 760px; }
.knowledge-intro h2 { margin: 0; color: var(--green-950); font-size: clamp(2rem, 4vw, 3.35rem); letter-spacing: -0.045em; line-height: 1.08; }
.knowledge-intro p { margin: 20px 0 0; color: var(--muted); font-size: 1.06rem; line-height: 1.75; }

.topic-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; margin-top: 44px; }
.topic-card { min-width: 0; display: flex; flex-direction: column; padding: 30px; background: var(--white); border: 1px solid var(--line); border-radius: var(--radius-md); box-shadow: var(--shadow-sm); }
.topic-card-kicker { margin: 0 0 10px; color: var(--green-700); font-size: 0.76rem; font-weight: 850; letter-spacing: 0.09em; text-transform: uppercase; }
.topic-card h2, .topic-card h3 { margin: 0; color: var(--green-950); font-size: 1.55rem; letter-spacing: -0.025em; line-height: 1.25; }
.topic-card p { margin: 16px 0 24px; color: var(--muted); line-height: 1.7; }
.topic-card .text-link { margin-top: auto; }

.article-shell { width: min(1160px, calc(100% - 48px)); margin-inline: auto; display: grid; grid-template-columns: minmax(220px, 0.34fr) minmax(0, 0.9fr); gap: clamp(42px, 7vw, 92px); align-items: start; }
.article-toc { position: sticky; top: calc(var(--header-height) + 28px); padding: 22px; background: var(--white); border: 1px solid var(--line); border-radius: var(--radius-sm); }
.article-toc strong { display: block; margin-bottom: 10px; color: var(--green-950); }
.article-toc ol { display: grid; gap: 4px; margin: 0; padding: 0; list-style: none; }
.article-toc a { min-height: 44px; display: flex; align-items: center; padding: 7px 8px; color: var(--green-700); border-radius: 8px; font-size: 0.9rem; font-weight: 700; text-decoration: none; }
.article-toc a:hover { color: var(--green-950); background: var(--green-100); }

.article-body { min-width: 0; }
.article-body > section { padding-block: 35px; border-bottom: 1px solid var(--line); }
.article-body > section:first-child { padding-top: 0; }
.article-body h2 { margin: 0 0 18px; color: var(--green-950); font-size: clamp(1.65rem, 3vw, 2.35rem); letter-spacing: -0.035em; line-height: 1.17; }
.article-body h3 { margin: 27px 0 10px; color: var(--green-900); font-size: 1.18rem; line-height: 1.35; }
.article-body p { margin: 0 0 17px; color: #34443a; line-height: 1.78; }
.article-body p:last-child { margin-bottom: 0; }
.article-body ul, .article-body ol { display: grid; gap: 10px; margin: 18px 0; padding-left: 24px; color: #34443a; }
.article-body li { padding-left: 5px; line-height: 1.7; }
.article-body a { color: var(--green-700); text-underline-offset: 4px; overflow-wrap: anywhere; }
.fact-box { margin: 26px 0; padding: 22px 24px; background: var(--green-50); border-left: 5px solid var(--green-600); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; }
.fact-box strong { display: block; margin-bottom: 6px; color: var(--green-950); }
.fact-box p { color: var(--muted); }

.article-notice { display: grid; grid-template-columns: 54px 1fr; gap: 20px; margin-top: 42px; padding: 26px; background: #f7efe6; border: 1px solid #e4d2c1; border-radius: var(--radius-md); }
.article-notice-mark { width: 50px; height: 50px; display: grid; place-items: center; color: var(--white); background: #8b543b; border-radius: 15px; font-size: 1.7rem; }
.article-notice h2 { margin: 0; color: var(--green-950); font-size: 1.25rem; }
.article-notice p { margin: 8px 0 0; color: #64564e; line-height: 1.7; }

.article-cta { margin-top: 42px; padding: 30px; color: var(--white); background: var(--green-900); border-radius: var(--radius-md); }
.article-cta h2 { margin: 0; color: var(--white); font-size: 1.65rem; }
.article-cta p { margin: 12px 0 0; color: #cedbd1; }
.article-cta .text-link { color: var(--lime); }

.source-list { font-size: 0.93rem; }
.source-list li { padding-left: 2px; }
.related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 30px; }
.related-card { min-height: 140px; display: flex; flex-direction: column; justify-content: space-between; padding: 22px; color: var(--green-950); background: var(--white); border: 1px solid var(--line); border-radius: var(--radius-sm); text-decoration: none; }
.related-card:hover { border-color: #a8bdac; box-shadow: var(--shadow-sm); }
.related-card span { color: var(--green-700); font-size: 0.85rem; font-weight: 800; }
.related-card strong { font-size: 1.12rem; line-height: 1.35; }

@media (max-width: 900px) {
  .knowledge-hero-grid, .article-shell { grid-template-columns: 1fr; }
  .knowledge-meta { max-width: 520px; }
  .article-toc { position: static; }
  .related-grid { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .article-shell { width: min(100% - 28px, 1160px); }
  .knowledge-hero h1 { font-size: clamp(1.85rem, 8.2vw, 3.6rem); hyphens: none; overflow-wrap: normal; }
  .topic-grid { grid-template-columns: 1fr; }
  .topic-card { padding: 24px; }
  .article-notice { grid-template-columns: 1fr; padding: 22px; }
  .article-cta { padding: 24px; }
}

@media print {
  .article-toc, .article-cta, .related-grid { display: none; }
  .article-shell { width: 100%; display: block; }
}