/* hightbiger 币圈博客 — editorial static theme */
:root {
  --bg: #f7f5f0;
  --surface: #fffdf8;
  --surface-2: #efece4;
  --ink: #17150f;
  --ink-soft: #2d2a22;
  --muted: #6d685c;
  --line: #e1dcd0;
  --line-strong: #cfc8b8;
  --accent: #a8480a;
  --accent-hover: #8a3a06;
  --accent-ink: #fff8ef;
  --accent-soft: #fbeee0;
  --gold: #a97a1f;
  --green: #2f6f4f;
  --shadow: 0 1px 2px rgba(23, 21, 15, .04), 0 8px 24px rgba(23, 21, 15, .05);
  --shadow-lift: 0 2px 4px rgba(23, 21, 15, .05), 0 16px 40px rgba(23, 21, 15, .10);
  --radius: 14px;
  --radius-sm: 9px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-serif: Georgia, "Times New Roman", "Songti SC", "Noto Serif SC", serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  --max: 1120px;
  --measure: 720px;
  color-scheme: light;
}

html[data-theme="dark"] {
  --bg: #121110;
  --surface: #1b1a17;
  --surface-2: #24211c;
  --ink: #f3efe6;
  --ink-soft: #e4dfd3;
  --muted: #a7a093;
  --line: #322e27;
  --line-strong: #463f34;
  --accent: #f0b429;
  --accent-hover: #ffc84d;
  --accent-ink: #241a05;
  --accent-soft: #2b2314;
  --gold: #e0a63a;
  --green: #7cc4a0;
  --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 8px 24px rgba(0, 0, 0, .25);
  --shadow-lift: 0 2px 4px rgba(0, 0, 0, .35), 0 16px 40px rgba(0, 0, 0, .4);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
a:hover { color: var(--accent); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }
::selection { background: var(--accent); color: var(--accent-ink); }

.wrap { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 24px; }
.skip {
  position: absolute; left: -9999px; top: 0; z-index: 100;
  background: var(--ink); color: var(--bg); padding: 10px 16px; border-radius: 0 0 8px 0;
}
.skip:focus { left: 0; }

/* ---------- header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 86%, transparent);
  backdrop-filter: saturate(140%) blur(12px);
  -webkit-backdrop-filter: saturate(140%) blur(12px);
  border-bottom: 1px solid var(--line);
}
.header-inner { display: flex; align-items: center; gap: 22px; min-height: 64px; }
.brand { display: flex; align-items: baseline; gap: 9px; margin-right: auto; white-space: nowrap; }
.brand-mark {
  font-family: var(--font-serif); font-size: 1.42rem; font-weight: 700;
  letter-spacing: -.02em; line-height: 1;
}
.brand-sub {
  font-size: .72rem; letter-spacing: .18em; color: var(--muted);
  border-left: 1px solid var(--line-strong); padding-left: 9px; line-height: 1.2;
}
.nav { display: flex; align-items: center; gap: 4px; }
.nav a {
  padding: 7px 12px; border-radius: 999px; font-size: .92rem; color: var(--ink-soft);
  transition: background .15s, color .15s;
}
.nav a:hover { background: var(--surface-2); color: var(--ink); }
.nav a[aria-current="page"] { color: var(--accent); background: var(--accent-soft); font-weight: 600; }
.header-tools { display: flex; align-items: center; gap: 6px; }
.icon-btn {
  display: inline-flex; align-items: center; justify-content: center;
  width: 38px; height: 38px; border-radius: 50%;
  border: 1px solid var(--line); background: var(--surface); color: var(--ink);
  cursor: pointer; transition: border-color .15s, background .15s;
}
.icon-btn:hover { border-color: var(--line-strong); background: var(--surface-2); }
.icon-btn svg { width: 18px; height: 18px; }
.nav-toggle { display: none; }

/* ---------- hero ---------- */
.hero {
  position: relative; overflow: hidden;
  padding: 84px 0 64px;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(60% 90% at 82% 10%, color-mix(in srgb, var(--accent) 12%, transparent), transparent 70%),
    radial-gradient(45% 70% at 8% 90%, color-mix(in srgb, var(--gold) 9%, transparent), transparent 70%);
}
.hero::before {
  content: ""; position: absolute; inset: 0; pointer-events: none; opacity: .5;
  background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: linear-gradient(to bottom, rgba(0,0,0,.35), transparent 78%);
  -webkit-mask-image: linear-gradient(to bottom, rgba(0,0,0,.35), transparent 78%);
}
.hero-inner { position: relative; max-width: 780px; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: .78rem; letter-spacing: .16em; color: var(--accent);
  font-weight: 700; text-transform: uppercase; margin: 0 0 18px;
}
.eyebrow::before { content: ""; width: 26px; height: 1px; background: var(--accent); display: inline-block; }
.hero h1 {
  margin: 0 0 20px; font-size: clamp(2.1rem, 4.7vw, 3.3rem);
  line-height: 1.18; letter-spacing: -.025em; font-weight: 800; color: var(--ink);
  text-wrap: balance;
}
.hero h1 .accent { color: var(--accent); }
.hero .lede {
  margin: 0 0 30px; font-size: clamp(1.02rem, 1.6vw, 1.18rem);
  line-height: 1.9; color: var(--muted); max-width: 40em;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 11px 22px; border-radius: 999px; font-size: .96rem; font-weight: 600;
  background: var(--accent); color: var(--accent-ink); border: 1px solid var(--accent);
  transition: background .15s, transform .15s, border-color .15s;
}
.btn:hover { background: var(--accent-hover); border-color: var(--accent-hover); color: var(--accent-ink); transform: translateY(-1px); }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--line-strong); }
.btn-ghost:hover { background: var(--surface); color: var(--ink); border-color: var(--ink); }
.hero-stats {
  display: flex; flex-wrap: wrap; gap: 28px; margin-top: 40px; padding-top: 26px;
  border-top: 1px solid var(--line);
}
.stat b { display: block; font-size: 1.5rem; line-height: 1.2; letter-spacing: -.02em; }
.stat span { font-size: .8rem; color: var(--muted); letter-spacing: .06em; }

/* ---------- sections ---------- */
.section { padding: 72px 0; }
.section + .section { border-top: 1px solid var(--line); }
.section-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 20px; margin-bottom: 30px; }
.section-head h2 { margin: 0; font-size: clamp(1.5rem, 2.6vw, 1.95rem); letter-spacing: -.02em; }
.section-head p { margin: 6px 0 0; color: var(--muted); font-size: .95rem; }
.section-link { font-size: .9rem; color: var(--accent); font-weight: 600; white-space: nowrap; }
.section-link::after { content: " →"; }

/* ---------- cards ---------- */
.post-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 22px; }
.post-card {
  display: flex; flex-direction: column; gap: 12px;
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 24px 22px; box-shadow: var(--shadow);
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
.post-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lift); border-color: var(--line-strong); }
.card-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 12px; font-size: .78rem; color: var(--muted); }
.chip {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: .74rem; letter-spacing: .04em; font-weight: 600;
  color: var(--accent); background: var(--accent-soft);
  padding: 3px 9px; border-radius: 999px;
}
.post-card h3 { margin: 0; font-size: 1.13rem; line-height: 1.45; letter-spacing: -.01em; }
.post-card h3 a:hover { color: var(--accent); }
.card-summary { margin: 0; color: var(--muted); font-size: .9rem; line-height: 1.75; flex: 1; overflow-wrap: anywhere; }
.card-foot { display: flex; align-items: center; justify-content: space-between; font-size: .78rem; color: var(--muted); border-top: 1px solid var(--line); padding-top: 12px; }
.read-more { color: var(--accent); font-weight: 600; }

/* ---------- category grid ---------- */
.category-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }
.category-card {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-sm);
  padding: 20px 18px; display: flex; flex-direction: column; gap: 7px;
  transition: border-color .15s, transform .15s, background .15s;
}
.category-card:hover { border-color: var(--accent); transform: translateY(-2px); }
.category-card b { font-size: 1rem; letter-spacing: -.01em; }
.category-card span { font-size: .8rem; color: var(--muted); }
.category-card em { font-style: normal; font-size: .74rem; color: var(--accent); font-weight: 600; }

/* ---------- picks ---------- */
.picks { display: grid; grid-template-columns: 1.4fr 1fr; gap: 22px; }
.pick-main, .pick-side a {
  display: block; background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 28px; box-shadow: var(--shadow);
  transition: transform .18s, box-shadow .18s, border-color .18s;
}
.pick-main:hover, .pick-side a:hover { transform: translateY(-3px); box-shadow: var(--shadow-lift); border-color: var(--line-strong); }
.pick-main h3 { margin: 10px 0 10px; font-size: 1.45rem; letter-spacing: -.02em; }
.pick-main p { margin: 0 0 18px; color: var(--muted); }
.pick-side { display: grid; gap: 16px; }
.pick-side a { padding: 20px 22px; }
.pick-side b { display: block; font-size: 1rem; margin-bottom: 4px; }
.pick-side span { font-size: .84rem; color: var(--muted); }

/* ---------- article ---------- */
.breadcrumb { padding: 22px 0 0; font-size: .82rem; color: var(--muted); }
.breadcrumb ol { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; margin: 0; padding: 0; }
.breadcrumb li + li::before { content: "/"; margin-right: 8px; color: var(--line-strong); }
.breadcrumb a:hover { color: var(--accent); }

.article-layout { display: grid; grid-template-columns: minmax(0, 1fr) 250px; gap: 56px; padding: 34px 0 72px; align-items: start; }
.article-header { max-width: var(--measure); }
.article-header h1 { margin: 12px 0 18px; font-size: clamp(1.75rem, 3.6vw, 2.55rem); line-height: 1.35; letter-spacing: -.025em; }
.article-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 16px; font-size: .84rem; color: var(--muted); padding-bottom: 22px; border-bottom: 1px solid var(--line); }
.article-meta .author { color: var(--ink); font-weight: 600; }
.article-meta time { color: var(--muted); }
.summary-box {
  margin: 26px 0 0; padding: 20px 22px; border-left: 3px solid var(--accent);
  background: var(--accent-soft); border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  max-width: var(--measure);
}
.summary-box b { display: block; font-size: .76rem; letter-spacing: .14em; color: var(--accent); margin-bottom: 6px; }
.summary-box p { margin: 0; font-size: .96rem; line-height: 1.85; color: var(--ink-soft); }

.article-body { max-width: var(--measure); font-size: 1.04rem; line-height: 1.95; color: var(--ink-soft); margin-top: 34px; overflow-wrap: anywhere; }
.article-body > * + * { margin-top: 1.25em; }
.article-body h2, .article-body h3, .article-body h4 { color: var(--ink); line-height: 1.45; letter-spacing: -.01em; scroll-margin-top: 90px; }
.article-body h2 { font-size: 1.5rem; margin-top: 2.2em; padding-bottom: .35em; border-bottom: 1px solid var(--line); }
.article-body h3 { font-size: 1.2rem; margin-top: 1.9em; }
.article-body h4 { font-size: 1.05rem; margin-top: 1.6em; }
.article-body p { margin: 0; }
.article-body a { color: var(--accent); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 3px; }
.article-body a:hover { color: var(--accent-hover); }
.article-body ul, .article-body ol { padding-left: 1.4em; margin: 0; }
.article-body li { margin: .45em 0; }
.article-body li > ul, .article-body li > ol { margin: .45em 0; }
.article-body strong { color: var(--ink); font-weight: 700; }
.article-body blockquote {
  margin: 1.6em 0; padding: 18px 22px; border-left: 3px solid var(--line-strong);
  background: var(--surface); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; color: var(--muted);
}
.article-body blockquote p { margin: 0; }
.article-body figure { margin: 1.8em 0; }
.article-body figure img { width: 100%; border-radius: var(--radius-sm); border: 1px solid var(--line); background: var(--surface); }
.article-body figcaption { margin-top: 8px; text-align: center; font-size: .82rem; color: var(--muted); }
.article-body img { border-radius: var(--radius-sm); }
.article-body hr { border: 0; border-top: 1px solid var(--line); margin: 2.4em 0; }
.article-body code { font-family: var(--font-mono); font-size: .88em; background: var(--surface-2); padding: .15em .4em; border-radius: 4px; }
.article-body pre { background: var(--surface); border: 1px solid var(--line); padding: 16px; border-radius: var(--radius-sm); overflow: auto; }
.article-body pre code { background: none; padding: 0; }
.article-body .anchor { color: var(--line-strong); text-decoration: none; opacity: 0; margin-left: .3em; font-weight: 400; }
.article-body .anchor::before { content: "#"; }
.article-body h2:hover .anchor, .article-body h3:hover .anchor { opacity: 1; }
.table-scroll { overflow-x: auto; margin: 1.6em 0; border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--surface); }
.table-scroll table { width: 100%; border-collapse: collapse; font-size: .9rem; line-height: 1.65; }
.table-scroll th, .table-scroll td { padding: 10px 13px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
.table-scroll th { background: var(--surface-2); font-weight: 700; color: var(--ink); white-space: nowrap; }
.table-scroll tr:last-child td { border-bottom: 0; }
.faq-item { margin: 1.4em 0; padding: 18px 20px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-sm); }
.faq-q { margin: 0 0 6px !important; font-size: 1.02rem !important; border: 0 !important; padding: 0 !important; }
.faq-a { margin: 0 !important; color: var(--muted); }
.article-body .faq-q .anchor { display: none; }

.article-foot { max-width: var(--measure); margin-top: 44px; padding-top: 24px; border-top: 1px solid var(--line); }
.tag-list { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 26px; padding: 0; list-style: none; }
.tag-list a, .tag-list span {
  display: inline-block; font-size: .78rem; color: var(--muted);
  border: 1px solid var(--line); padding: 4px 10px; border-radius: 999px; background: var(--surface);
}
.tag-list a:hover { color: var(--accent); border-color: var(--accent); }
.author-card {
  display: flex; gap: 16px; align-items: flex-start; background: var(--surface);
  border: 1px solid var(--line); border-radius: var(--radius); padding: 22px;
}
.avatar {
  width: 52px; height: 52px; border-radius: 50%; flex: 0 0 52px;
  display: grid; place-items: center; background: var(--accent); color: var(--accent-ink);
  font-family: var(--font-serif); font-size: 1.35rem; font-weight: 700;
}
.author-card b { display: block; margin-bottom: 2px; }
.author-card p { margin: 4px 0 8px; font-size: .88rem; color: var(--muted); line-height: 1.7; }
.author-card .links { display: flex; gap: 12px; font-size: .8rem; }
.author-card .links a { color: var(--accent); }

.toc { position: sticky; top: 88px; font-size: .86rem; }
.toc-title { font-size: .74rem; letter-spacing: .14em; color: var(--muted); text-transform: uppercase; margin: 0 0 12px; font-weight: 700; }
.toc ol { list-style: none; margin: 0; padding: 0; border-left: 1px solid var(--line); }
.toc li { margin: 0; }
.toc a { display: block; padding: 5px 0 5px 14px; margin-left: -1px; border-left: 2px solid transparent; color: var(--muted); line-height: 1.55; }
.toc a:hover { color: var(--ink); }
.toc .lvl-3 a { padding-left: 26px; font-size: .82rem; }

.prev-next { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 30px; max-width: var(--measure); }
.prev-next a { border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 16px 18px; background: var(--surface); }
.prev-next a:hover { border-color: var(--accent); }
.prev-next span { display: block; font-size: .74rem; color: var(--muted); margin-bottom: 4px; }
.prev-next b { font-size: .92rem; line-height: 1.5; }
.prev-next .next { text-align: right; }

.related { margin-top: 30px; max-width: var(--measure); }
.related h2 { font-size: 1.15rem; margin: 0 0 16px; }
.related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.related-grid a { border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 14px; background: var(--surface); font-size: .86rem; line-height: 1.55; }
.related-grid a:hover { border-color: var(--accent); }
.related-grid time { display: block; font-size: .72rem; color: var(--muted); margin-top: 6px; }

/* ---------- listing pages ---------- */
.page-head { padding: 56px 0 34px; border-bottom: 1px solid var(--line); }
.page-head .eyebrow { margin-bottom: 12px; }
.page-head h1 { margin: 0 0 12px; font-size: clamp(1.9rem, 4vw, 2.7rem); letter-spacing: -.025em; }
.page-head p { margin: 0; max-width: 46em; color: var(--muted); line-height: 1.85; }
.page-head .count { display: inline-block; margin-top: 14px; font-size: .8rem; color: var(--accent); font-weight: 600; }
.post-list { list-style: none; margin: 0; padding: 0; }
.post-list li { display: grid; grid-template-columns: 120px minmax(0, 1fr); gap: 24px; padding: 24px 0; border-bottom: 1px solid var(--line); }
.post-list time { font-size: .82rem; color: var(--muted); padding-top: 3px; }
.post-list h2 { margin: 0 0 6px; font-size: 1.12rem; line-height: 1.5; letter-spacing: -.01em; }
.post-list p { margin: 0 0 8px; color: var(--muted); font-size: .9rem; line-height: 1.75; }
.post-list .meta { display: flex; flex-wrap: wrap; gap: 10px; font-size: .76rem; color: var(--muted); }
.year-group { padding: 34px 0 0; }
.year-group h2 { font-size: 1.6rem; letter-spacing: -.02em; margin: 0 0 8px; color: var(--accent); }
.archive-intro { padding: 12px 0 0; color: var(--muted); }
.tag-cloud { display: flex; flex-wrap: wrap; gap: 10px; padding: 8px 0 0; }
.tag-cloud a { border: 1px solid var(--line); background: var(--surface); border-radius: 999px; padding: 6px 14px; font-size: .86rem; color: var(--ink-soft); }
.tag-cloud a:hover { border-color: var(--accent); color: var(--accent); }
.tag-cloud .n { color: var(--muted); font-size: .76rem; margin-left: 4px; }

/* ---------- search ---------- */
.search-box { display: flex; gap: 10px; margin: 26px 0 8px; max-width: 620px; }
.search-box input {
  flex: 1; padding: 12px 16px; border: 1px solid var(--line-strong); border-radius: 999px;
  background: var(--surface); color: var(--ink); font: inherit; font-size: .95rem;
}
.search-box input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 18%, transparent); }
.search-results { padding: 20px 0 0; }
.search-results .hint { color: var(--muted); font-size: .9rem; }
.search-hit { padding: 18px 0; border-bottom: 1px solid var(--line); }
.search-hit h2 { margin: 0 0 5px; font-size: 1.05rem; }
.search-hit p { margin: 0; color: var(--muted); font-size: .88rem; }
.search-hit mark { background: var(--accent-soft); color: var(--accent); padding: 0 2px; border-radius: 2px; }

/* ---------- nav page (tools) ---------- */
.article-body .wp-block-quote { border-left-color: var(--accent); }

/* ---------- footer ---------- */
.site-footer { border-top: 1px solid var(--line); background: var(--surface); margin-top: 0; }
.footer-main { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.2fr; gap: 36px; padding: 52px 0 38px; }
.footer-brand b { font-family: var(--font-serif); font-size: 1.25rem; display: block; margin-bottom: 8px; }
.footer-brand p { margin: 0; color: var(--muted); font-size: .86rem; line-height: 1.8; max-width: 28em; }
.footer-col h3 { font-size: .76rem; letter-spacing: .14em; color: var(--muted); text-transform: uppercase; margin: 0 0 12px; }
.footer-col ul { list-style: none; margin: 0; padding: 0; font-size: .88rem; }
.footer-col li { margin: 7px 0; }
.footer-col a { color: var(--ink-soft); }
.footer-col a:hover { color: var(--accent); }
.footer-bottom {
  border-top: 1px solid var(--line); padding: 18px 0 26px;
  display: flex; flex-wrap: wrap; gap: 8px 24px; align-items: center; justify-content: space-between;
  font-size: .78rem; color: var(--muted);
}
.disclaimer { font-size: .76rem; color: var(--muted); line-height: 1.7; padding: 0 0 22px; max-width: 74em; }

/* ---------- misc ---------- */
.notice {
  border: 1px solid var(--line); background: var(--surface); border-radius: var(--radius-sm);
  padding: 16px 18px; font-size: .88rem; color: var(--muted); line-height: 1.75;
}
.empty { padding: 60px 0; color: var(--muted); text-align: center; }
.center { text-align: center; }
.mt-0 { margin-top: 0 !important; }

@media (max-width: 960px) {
  .post-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .category-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .article-layout { grid-template-columns: 1fr; gap: 0; }
  .article-side { display: none; }
  .picks { grid-template-columns: 1fr; }
  .footer-main { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 720px) {
  .wrap { padding: 0 18px; }
  .hero { padding: 56px 0 46px; }
  .section { padding: 52px 0; }
  .post-grid { grid-template-columns: 1fr; }
  .category-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .post-list li { grid-template-columns: 1fr; gap: 6px; }
  .related-grid { grid-template-columns: 1fr; }
  .prev-next { grid-template-columns: 1fr; }
  .prev-next .next { text-align: left; }
  .nav-toggle { display: inline-flex; }
  .nav {
    display: none; position: absolute; left: 0; right: 0; top: 100%;
    background: var(--surface); border-bottom: 1px solid var(--line);
    padding: 10px 18px 16px; flex-direction: column; align-items: stretch; gap: 2px;
    box-shadow: var(--shadow);
  }
  .nav.open { display: flex; }
  .nav a { padding: 11px 12px; border-radius: 8px; }
  .header-inner { position: relative; }
  .brand-sub { display: none; }
  .hero-stats { gap: 20px; }
  .stat b { font-size: 1.25rem; }
  .footer-main { grid-template-columns: 1fr; gap: 24px; padding: 36px 0 24px; }
  .article-body { font-size: 1rem; line-height: 1.9; }
  .article-header h1 { font-size: 1.65rem; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; scroll-behavior: auto !important; }
}
@media print {
  .site-header, .site-footer, .article-side, .prev-next, .related, .breadcrumb, .summary-box { display: none !important; }
  body { background: #fff; color: #000; }
  .article-layout { grid-template-columns: 1fr; }
  .article-body { max-width: none; font-size: 11pt; }
}