:root {
  --ink: #27323b;
  --paper: #f7f4ed;
  --cream: #eee8dc;
  --terracotta: #be624b;
  --blue: #143b51;
  --gold: #c99b59;
  --line: rgba(39, 50, 59, .16);
  --serif: "Noto Serif TC", serif;
  --sans: Outfit, "Noto Serif TC", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: var(--sans); line-height: 1.75; }
a { color: inherit; }
.skip-link { position: absolute; left: -9999px; top: 0; z-index: 20; background: var(--blue); color: white; padding: 10px 16px; }
.skip-link:focus { left: 12px; }
.site-header { min-height: 78px; max-width: 1180px; margin: auto; padding: 0 28px; display: flex; align-items: center; gap: 34px; }
.brand { display: flex; align-items: center; gap: 8px; text-decoration: none; font: 700 23px var(--serif); letter-spacing: .12em; }
.brand-mark { color: var(--terracotta); }
.brand small { margin: 8px 0 0 -3px; font: 500 9px var(--sans); letter-spacing: .18em; }
.site-nav { display: flex; gap: 28px; margin-left: auto; align-items: center; }
.site-nav a { text-decoration: none; font-size: 13px; }
.site-nav a[aria-current="page"] { color: var(--terracotta); border-bottom: 1px solid currentColor; }
.nav-cta { background: var(--blue); color: white; padding: 10px 16px; }
.eyebrow { margin: 0 0 13px; color: var(--terracotta); font-size: 11px; font-weight: 600; letter-spacing: .17em; }

.hub-hero { padding: 92px max(6vw, 28px) 78px; background: linear-gradient(135deg, #f5efe4, #e9dfcf); }
.hub-hero-inner { max-width: 1080px; margin: auto; display: grid; grid-template-columns: 1.45fr .55fr; gap: 70px; align-items: end; }
.hub-hero h1 { margin: 0; max-width: 730px; font: 500 clamp(42px, 6vw, 70px)/1.2 var(--serif); letter-spacing: .025em; }
.hub-hero h1 em { display: block; color: var(--terracotta); font-style: normal; }
.hub-hero-copy { margin: 22px 0 0; max-width: 620px; color: #59636a; }
.hub-note { border-left: 1px solid var(--gold); padding-left: 23px; font-family: var(--serif); color: #6a5848; }
.hub-note strong { display: block; margin-bottom: 8px; color: var(--blue); }
.category-nav { position: sticky; top: 0; z-index: 10; border-bottom: 1px solid var(--line); background: rgba(247, 244, 237, .96); backdrop-filter: blur(10px); }
.category-nav div { max-width: 1080px; margin: auto; padding: 13px 28px; display: flex; gap: 12px; overflow-x: auto; }
.category-nav a { flex: none; border: 1px solid var(--line); padding: 7px 13px; text-decoration: none; font-size: 12px; }
.category-nav a:hover { border-color: var(--terracotta); color: var(--terracotta); }
.hub-main { max-width: 1080px; margin: auto; padding: 72px 28px 100px; }
.category-section { scroll-margin-top: 78px; margin-bottom: 82px; }
.category-heading { display: grid; grid-template-columns: .55fr 1.45fr; gap: 50px; align-items: end; padding-bottom: 20px; border-bottom: 1px solid var(--line); }
.category-heading h2 { margin: 0; font: 500 clamp(29px, 4vw, 42px)/1.25 var(--serif); }
.category-heading p { margin: 0; color: #657075; font-size: 14px; }
.category-heading a { color: var(--terracotta); text-decoration: none; white-space: nowrap; }
.article-grid { margin-top: 25px; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.article-card { min-height: 238px; padding: 28px; border: 1px solid var(--line); background: #faf8f2; display: flex; flex-direction: column; transition: transform .2s, box-shadow .2s; }
.article-card:hover { transform: translateY(-3px); box-shadow: 0 14px 30px rgba(39, 50, 59, .08); }
.article-card a { text-decoration: none; }
.article-card h3 { margin: 10px 0; font: 500 24px/1.45 var(--serif); }
.article-card p { margin: 0 0 22px; color: #606b70; font-size: 14px; }
.article-card-meta { margin-top: auto; display: flex; justify-content: space-between; color: #7a8183; font-size: 11px; }
.empty-category { grid-column: 1/-1; padding: 32px; border: 1px dashed rgba(39, 50, 59, .25); color: #747b7e; background: rgba(255,255,255,.25); }

.category-hero { padding: 72px max(6vw, 28px); background: var(--cream); }
.category-hero > div { max-width: 980px; margin: auto; }
.category-hero h1 { margin: 0; font: 500 clamp(40px, 6vw, 62px)/1.2 var(--serif); }
.category-hero p:last-child { max-width: 660px; color: #5f696d; }
.category-list { max-width: 980px; margin: auto; padding: 60px 28px 100px; }
.back-link { display: inline-block; margin-bottom: 24px; color: var(--terracotta); text-decoration: none; font-size: 13px; }

.article-hero { padding: 72px max(6vw, 28px) 54px; background: var(--cream); }
.article-hero-inner { max-width: 880px; margin: auto; }
.breadcrumbs { margin-bottom: 35px; color: #6e777a; font-size: 12px; }
.breadcrumbs a { text-decoration: none; }
.article-hero h1 { margin: 0; max-width: 820px; font: 500 clamp(38px, 6vw, 64px)/1.23 var(--serif); letter-spacing: .02em; }
.article-deck { margin: 23px 0; max-width: 720px; color: #566267; font: 400 17px/1.9 var(--serif); }
.article-byline { display: flex; flex-wrap: wrap; gap: 8px 18px; color: #70797c; font-size: 12px; }
.article-layout { max-width: 1080px; margin: auto; padding: 64px 28px 110px; display: grid; grid-template-columns: 220px minmax(0, 680px); gap: 70px; justify-content: center; }
.article-toc { position: sticky; top: 30px; align-self: start; padding: 20px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.article-toc strong { display: block; margin-bottom: 10px; font: 600 12px var(--sans); letter-spacing: .12em; }
.article-toc ol { margin: 0; padding: 0; list-style: none; }
.article-toc li { margin: 7px 0; }
.article-toc li.sub { padding-left: 13px; }
.article-toc a { color: #687276; text-decoration: none; font-size: 12px; line-height: 1.45; }
.article-toc a:hover { color: var(--terracotta); }
.article-body { min-width: 0; font-family: var(--serif); font-size: 17px; line-height: 2; }
.article-body > p:first-child { font-size: 19px; color: #3f4c52; }
.article-body h2, .article-body h3 { scroll-margin-top: 30px; color: var(--blue); }
.article-body h2 { margin: 2.5em 0 .7em; font: 600 31px/1.45 var(--serif); }
.article-body h3 { margin: 2em 0 .55em; font: 600 23px/1.5 var(--serif); }
.article-body p { margin: 0 0 1.35em; }
.article-body ul, .article-body ol { margin: 0 0 1.5em; padding-left: 1.4em; }
.article-body li { margin: .45em 0; }
.article-body blockquote { margin: 2em 0; padding: 20px 24px; border-left: 3px solid var(--terracotta); background: #f0e9dd; color: #4e5a5f; }
.article-body blockquote p:last-child { margin-bottom: 0; }
.article-body a { color: #9e4c3a; text-underline-offset: 4px; }
.article-body hr { margin: 3em 0; border: 0; border-top: 1px solid var(--line); }
.article-cta { margin-top: 52px; padding: 34px; background: var(--blue); color: white; font-family: var(--sans); }
.article-cta h2 { margin: 0 0 9px; color: white; font: 500 28px var(--serif); }
.article-cta p { margin: 0 0 20px; color: #d7e0e2; font-size: 14px; }
.article-cta a { display: inline-flex; align-items: center; gap: 24px; background: white; color: var(--blue); padding: 12px 17px; text-decoration: none; font-size: 13px; }
.author-box { margin-top: 42px; padding-top: 28px; border-top: 1px solid var(--line); display: grid; grid-template-columns: 68px 1fr; gap: 18px; align-items: center; font-family: var(--sans); }
.author-box img { width: 68px; height: 68px; border-radius: 50%; object-fit: cover; }
.author-box strong { font-family: var(--serif); }
.author-box p { margin: 4px 0 0; color: #667074; font-size: 12px; line-height: 1.7; }
.related { max-width: 980px; margin: 0 auto 100px; padding: 0 28px; }
.related h2 { font: 500 31px var(--serif); }
.site-footer { border-top: 1px solid var(--line); }
.site-footer-inner { min-height: 110px; max-width: 1180px; margin: auto; padding: 25px 28px; display: flex; gap: 24px; align-items: center; justify-content: space-between; }
.site-footer p, .site-footer span { color: #687174; font-size: 11px; }
.footer-links { display: flex; gap: 18px; }
.footer-links a { font-size: 11px; text-decoration: none; }

@media (max-width: 760px) {
  .site-header { min-height: 68px; padding: 0 20px; }
  .brand small, .site-nav a:not(.nav-cta) { display: none; }
  .site-nav { gap: 0; }
  .hub-hero { padding: 65px 24px 58px; }
  .hub-hero-inner { display: block; }
  .hub-note { margin-top: 38px; }
  .category-nav div { padding-inline: 20px; }
  .hub-main { padding: 55px 20px 75px; }
  .category-heading { display: block; }
  .category-heading p { margin-top: 12px; }
  .article-grid { grid-template-columns: 1fr; }
  .article-hero { padding: 52px 22px 42px; }
  .article-layout { display: block; padding: 42px 22px 78px; }
  .article-toc { position: static; margin-bottom: 38px; }
  .article-body { font-size: 16px; }
  .article-body h2 { font-size: 27px; }
  .article-cta { margin-inline: -5px; padding: 28px 24px; }
  .site-footer-inner { padding: 28px 22px; flex-wrap: wrap; }
}