/* AI租界 (AI Enclave) blog
   The pages are rendered server-side by the admin backend (/blog, /blog/{slug}) and styled here.
   Loaded after styles.css, so every token (colour, radius, type) comes from the site. */

/* nav: the blog template has no sliding indicator, so the current page carries the pill itself */
.nav__links a.blog-nav-current {
  background: var(--surface); color: var(--ink);
  box-shadow: 0 1px 2px rgba(23,28,36,.10), 0 0 0 1px rgba(23,28,36,.04);
}

/* --------------------------------------------------------------------------
   Index
   -------------------------------------------------------------------------- */
.blog-hero { padding: clamp(48px, 7vw, 96px) 0 clamp(28px, 3.4vw, 44px); }
.blog-hero h1 { font-size: clamp(36px, 5vw, 64px); font-weight: 650; letter-spacing: -0.035em; line-height: 1.08; }
.blog-hero p { margin-top: 14px; font-size: 18px; color: var(--ink-2); max-width: 40ch; }

.blog-cats { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 28px; }
.blog-cats a {
  padding: 7px 14px; border-radius: 999px; border: 1px solid var(--line); background: var(--surface);
  font-size: 14.5px; font-weight: 500; color: var(--ink-2);
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}
.blog-cats a:hover { border-color: var(--line-strong); color: var(--ink); }
.blog-cats a.is-on { background: var(--ink); border-color: var(--ink); color: #fff; }

.blog-list { padding: 0 0 clamp(72px, 10vw, 140px); }
.posts { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.post-row { display: grid; grid-template-columns: 190px minmax(0, 1fr); gap: 8px 32px; padding: 30px 0; border-bottom: 1px solid var(--line); }
.post-row__meta { display: flex; flex-wrap: wrap; align-items: baseline; align-content: start; gap: 4px 12px; padding-top: 7px; font-size: 14px; color: var(--ink-3); }
.post-row__meta a { color: var(--ink-2); transition: color var(--dur) var(--ease); }
.post-row__meta a:hover { color: var(--accent-ink); }
.post-row__pin { padding: 1px 8px; border-radius: 999px; background: var(--accent-soft); color: var(--accent-ink); font-size: 12.5px; font-weight: 500; }
.post-row__body h2 { font-size: clamp(21px, 2.2vw, 27px); letter-spacing: -0.02em; line-height: 1.32; text-wrap: balance; }
.post-row__body h2 a { transition: color var(--dur) var(--ease); }
.post-row__body h2 a:hover { color: var(--accent-ink); }
.post-row__body p { margin-top: 8px; color: var(--ink-2); max-width: 62ch; }
@media (max-width: 720px) {
  .post-row { grid-template-columns: 1fr; padding: 24px 0; }
  .post-row__meta { padding-top: 0; }
}

.blog-pager { display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 12px; margin-top: 32px; }
.blog-pager > :first-child { justify-self: start; }
.blog-pager > :last-child { justify-self: end; }
.blog-pager__info { font-size: 14px; color: var(--ink-3); }
.blog-empty { padding: 48px 0; border-top: 1px solid var(--line); color: var(--ink-2); }
.blog-empty a { color: var(--accent-ink); text-decoration: underline; text-underline-offset: 4px; }

/* --------------------------------------------------------------------------
   Article
   -------------------------------------------------------------------------- */
.article { padding: clamp(36px, 5vw, 72px) 0 clamp(72px, 10vw, 140px); }
.article__wrap { max-width: 760px; }
.article__crumbs { display: flex; flex-wrap: wrap; gap: 8px; font-size: 14px; color: var(--ink-3); }
.article__crumbs a { transition: color var(--dur) var(--ease); }
.article__crumbs a:hover { color: var(--accent-ink); }
.article h1 { margin-top: 18px; font-size: clamp(30px, 4.2vw, 46px); font-weight: 650; letter-spacing: -0.03em; line-height: 1.2; text-wrap: balance; }
.article__meta { display: flex; flex-wrap: wrap; gap: 4px 16px; margin-top: 18px; padding-bottom: 28px; border-bottom: 1px solid var(--line); font-size: 14px; color: var(--ink-3); }
.article__cover { width: 100%; height: auto; margin-top: 32px; border-radius: var(--r-lg); border: 1px solid var(--line); }

/* body text: about 40 Chinese characters per line at desktop width */
.prose { margin-top: 32px; font-size: 17px; line-height: 1.85; color: #262D38; overflow-wrap: break-word; }
.prose > * + * { margin-top: 1.15em; }
.prose h2 { margin-top: 2.2em; font-size: 1.5em; line-height: 1.3; letter-spacing: -0.02em; color: var(--ink); }
.prose h3 { margin-top: 1.9em; font-size: 1.2em; line-height: 1.35; color: var(--ink); }
.prose h4 { margin-top: 1.6em; font-size: 1em; color: var(--ink); }
.prose h2 + *, .prose h3 + *, .prose h4 + * { margin-top: .7em; }
.prose a { color: var(--accent-ink); text-decoration: underline; text-decoration-color: color-mix(in srgb, var(--accent) 35%, transparent); text-underline-offset: 4px; }
.prose a:hover { text-decoration-color: currentColor; }
.prose strong { font-weight: 650; color: var(--ink); }
.prose ul, .prose ol { margin-bottom: 0; padding-left: 1.4em; }
.prose li + li, .prose li > ul, .prose li > ol { margin-top: .4em; }
.prose li:has(> input[type="checkbox"]) { list-style: none; margin-left: -1.4em; }
.prose li > input[type="checkbox"] { margin-right: .5em; }
.prose blockquote { margin-inline: 0; padding: 2px 0 2px 18px; border-left: 3px solid var(--line-strong); color: var(--ink-2); }
.prose code { font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace; font-size: .88em; background: var(--bg-2); border: 1px solid var(--line); border-radius: 6px; padding: .12em .38em; }
.prose pre { margin-bottom: 0; background: var(--rack); color: var(--rack-text); border-radius: var(--r-md); padding: 18px 20px; overflow-x: auto; font-size: 14px; line-height: 1.7; }
.prose pre code { background: none; border: 0; padding: 0; font-size: inherit; color: inherit; }
.prose img { height: auto; border-radius: var(--r-md); border: 1px solid var(--line); }
.prose hr { border: 0; border-top: 1px solid var(--line); margin-block: 2.4em; }
.prose table { display: block; max-width: 100%; overflow-x: auto; border-collapse: collapse; font-size: 15px; line-height: 1.6; font-variant-numeric: tabular-nums; }
.prose th, .prose td { padding: 10px 16px 10px 0; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
.prose th { font-weight: 600; color: var(--ink); border-bottom-color: var(--line-strong); }
@media (max-width: 560px) { .prose { font-size: 16px; line-height: 1.8; } }

.article__tags { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; margin: 40px 0 0; padding: 0; }
.article__tags a { display: block; padding: 5px 12px; border-radius: 999px; background: var(--bg-2); border: 1px solid var(--line); font-size: 14px; color: var(--ink-2); transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease); }
.article__tags a:hover { border-color: var(--line-strong); color: var(--ink); }

.article__cta {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 18px 28px;
  margin-top: 48px; padding: clamp(20px, 3vw, 30px);
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--r-lg);
}
.article__cta strong { display: block; font-size: 19px; font-weight: 650; letter-spacing: -0.015em; line-height: 1.35; }
.article__cta p { margin-top: 6px; font-size: 15px; color: var(--ink-2); max-width: 44ch; }

.article__related { margin-top: 56px; }
.article__related h2 { font-size: 15px; letter-spacing: 0; color: var(--ink-3); }
.article__related ul { list-style: none; margin: 12px 0 0; padding: 0; border-top: 1px solid var(--line); }
.article__related li { display: flex; justify-content: space-between; align-items: baseline; gap: 16px; padding: 14px 0; border-bottom: 1px solid var(--line); }
.article__related a { font-weight: 500; transition: color var(--dur) var(--ease); }
.article__related a:hover { color: var(--accent-ink); }
.article__related time { flex: none; font-size: 14px; color: var(--ink-3); }