@charset "UTF-8";
/* ==========================================================================
   代码前沿 · CODE FRONTIER  —  style.css
   纯手写 CSS，无框架、无 CDN 依赖
   ========================================================================== */

/* ---------- 1. Tokens ---------- */
:root {
  --bg:         #faf9f6;
  --bg-sunken:  #f2f0e9;
  --bg-raise:   #ffffff;
  --ink:        #1a1917;
  --ink-2:      #45413a;
  --muted:      #7b756a;
  --line:       #e3ded2;
  --line-soft:  #eeeae0;
  --accent:     #a8432c;
  --accent-ink: #8a3421;
  --accent-bg:  #f7eae4;
  --cool:       #2f5d6b;
  --cool-bg:    #e6eef0;
  --code-bg:    #1d1c1a;
  --code-ink:   #e8e3d8;
  --ok:         #3f6b4f;

  --mono: ui-monospace, "SFMono-Regular", "SF Mono", Menlo, Consolas,
          "Liberation Mono", "Courier New", monospace;
  --serif: "Songti SC", "Source Han Serif SC", "Noto Serif SC", "SimSun",
           Georgia, "Times New Roman", serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
          "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", sans-serif;

  --wrap: 1120px;
  --gut: 28px;
  --r: 3px;
}

/* ---------- 2. Reset ---------- */
*, *::before, *::after { 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(--sans);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image: radial-gradient(circle at 18% 10%, rgba(168, 67, 44, .045), transparent 42%),
                    radial-gradient(circle at 84% 0%, rgba(47, 93, 107, .04), transparent 38%);
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--accent-ink); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
h1, h2, h3, h4, p, ul, ol, dl, figure, blockquote { margin: 0; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
::selection { background: var(--accent); color: #fff; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

/* ---------- 3. Layout ---------- */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gut);
  position: relative;
  z-index: 1;
}
main { display: block; min-height: 42vh; }

/* ---------- 4. Header ---------- */
.site-head {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(250, 249, 246, .9);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.site-head__in {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  height: 66px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  color: var(--ink);
  text-decoration: none;
}
.brand:hover { text-decoration: none; }
.brand__mark {
  width: 30px; height: 30px;
  display: grid;
  place-items: center;
  background: var(--ink);
  color: var(--bg);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .04em;
  border-radius: 2px;
  flex: none;
}
.brand__name { font-weight: 600; letter-spacing: .02em; line-height: 1.25; }
.brand__name small {
  display: block;
  font-family: var(--mono);
  font-size: 9.5px;
  font-weight: 400;
  letter-spacing: .18em;
  color: var(--muted);
  text-transform: uppercase;
}
.nav { display: flex; align-items: center; gap: 2px; }
.nav a {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--ink-2);
  padding: 8px 12px;
  border-radius: 2px;
  text-decoration: none;
  transition: background .16s, color .16s;
}
.nav a:hover { background: var(--bg-sunken); color: var(--ink); text-decoration: none; }
.nav a[aria-current="page"] { color: var(--accent-ink); background: var(--accent-bg); }
.nav__tag {
  margin-left: 10px;
  border: 1px solid var(--line);
  font-size: 11px;
  letter-spacing: .08em;
}
.nav-toggle { display: none; }

/* ---------- 5. Hero ---------- */
.hero { padding: 68px 0 60px; border-bottom: 1px solid var(--line); }
.hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.06fr) minmax(0, .94fr);
  gap: 54px;
  align-items: start;
}
.hero__grid > *, .about-grid > * { min-width: 0; }

.eyebrow {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 22px;
}
.eyebrow::before {
  content: "";
  width: 26px; height: 1px;
  background: var(--accent);
  flex: none;
}
.hero h1 {
  font-family: var(--serif);
  font-size: clamp(34px, 4.3vw, 46px);
  line-height: 1.24;
  letter-spacing: -.01em;
  font-weight: 700;
  text-wrap: balance;
}
.hero h1 em { font-style: normal; color: var(--accent); }
.hero__lede {
  margin-top: 20px;
  font-size: 15.5px;
  color: var(--ink-2);
  max-width: 44ch;
}
.hero__lede strong { font-weight: 600; color: var(--ink); }
.hero__actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 12.5px;
  letter-spacing: .06em;
  padding: 11px 20px;
  border: 1px solid var(--ink);
  border-radius: var(--r);
  background: var(--ink);
  color: var(--bg);
  text-decoration: none;
  transition: transform .16s, background .16s, border-color .16s, color .16s;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); background: var(--accent); border-color: var(--accent); }
.btn--ghost { background: transparent; color: var(--ink); border-color: var(--line); }
.btn--ghost:hover { background: var(--bg-raise); color: var(--accent-ink); border-color: var(--accent); }
.btn__k { opacity: .55; }

/* ---------- 6. 信号面板（Hero 右侧） ---------- */
.signals {
  border: 1px solid var(--line);
  background: var(--bg-raise);
  border-radius: var(--r);
  overflow: hidden;
}
.signals__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 13px 16px;
  border-bottom: 1px solid var(--line);
  background: var(--bg-sunken);
}
.signals__title {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--ink-2);
}
.signals__live {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .1em;
  color: var(--ok);
}
.signals__live i {
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--ok);
  display: block;
}
.signals__list { list-style: none; margin: 0; padding: 0; }
.signals__item {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 12px;
  padding: 13px 16px;
  border-bottom: 1px solid var(--line-soft);
  align-items: baseline;
}
.signals__item:last-child { border-bottom: 0; }
.signals__date {
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--muted);
  letter-spacing: .02em;
}
.signals__text { font-size: 13.5px; color: var(--ink-2); line-height: 1.6; }
.signals__text b { color: var(--ink); font-weight: 600; }
.signals__foot {
  padding: 11px 16px;
  border-top: 1px solid var(--line);
  background: var(--bg-sunken);
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .04em;
  color: var(--muted);
}

/* ---------- 7. Section ---------- */
.sec { padding: 66px 0; border-bottom: 1px solid var(--line); }
.sec--last { border-bottom: 0; }
.sec__head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 36px;
}
.sec__label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 10px;
}
.sec__label span { color: var(--accent); margin-right: 8px; }
.sec h2 {
  font-family: var(--serif);
  font-size: clamp(24px, 3.2vw, 32px);
  line-height: 1.3;
  font-weight: 700;
  letter-spacing: -.005em;
}
.sec__sub {
  margin-top: 12px;
  color: var(--ink-2);
  font-size: 14.5px;
  max-width: 58ch;
}
.sec__more {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .06em;
  white-space: nowrap;
  padding-bottom: 4px;
  color: var(--accent-ink);
}

/* ---------- 8. 深度文章卡片 ---------- */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}
.card {
  background: var(--bg-raise);
  padding: 26px 24px 22px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  text-decoration: none;
  color: inherit;
  transition: background .18s;
  position: relative;
}
.card:hover { background: #fffdf9; text-decoration: none; }
.card::after {
  content: "";
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 2px;
  background: var(--accent);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform .22s ease;
}
.card:hover::after { transform: scaleY(1); }
.card__top { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.card__no {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--muted);
}
.card__lang {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .1em;
  color: var(--accent-ink);
  background: var(--accent-bg);
  padding: 2px 7px;
  border-radius: 2px;
  white-space: nowrap;
}
.card__lang--cool { color: var(--cool); background: var(--cool-bg); }
.card h3 {
  font-family: var(--serif);
  font-size: 19px;
  line-height: 1.48;
  font-weight: 700;
}
.card p { font-size: 13.8px; color: var(--ink-2); line-height: 1.72; flex: 1; }
.card__foot {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .04em;
  color: var(--muted);
}
.card__foot span:last-child { margin-left: auto; }

/* ---------- 9. 速览（快讯列表） ---------- */
.digest { border-top: 1px solid var(--line); }
.digest__row {
  display: grid;
  grid-template-columns: 76px minmax(0, 1fr) 96px;
  gap: 20px;
  align-items: baseline;
  padding: 17px 4px;
  border-bottom: 1px solid var(--line-soft);
}
.digest__date {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .04em;
  color: var(--muted);
}
.digest__text { font-size: 14.5px; color: var(--ink-2); line-height: 1.7; }
.digest__text b { color: var(--ink); font-weight: 650; }
.digest__text a { color: var(--accent-ink); }
.digest__text code {
  font-family: var(--mono);
  font-size: .88em;
  background: var(--bg-sunken);
  border: 1px solid var(--line-soft);
  border-radius: 2px;
  padding: 0 4px;
  color: var(--ink-2);
}
.digest__tag {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .1em;
  text-align: right;
  color: var(--muted);
}
.digest__tag--hot { color: var(--accent-ink); }

/* ---------- 10. 专题 ---------- */
.topics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 18px;
}
.topic {
  border: 1px solid var(--line);
  background: var(--bg-raise);
  padding: 22px 20px;
  border-radius: var(--r);
  display: flex;
  flex-direction: column;
  gap: 9px;
  transition: border-color .18s, transform .18s;
}
.topic:hover { border-color: var(--accent); transform: translateY(-2px); }
.topic__k {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--accent-ink);
}
.topic h3 {
  font-family: var(--serif);
  font-size: 17.5px;
  font-weight: 700;
  line-height: 1.45;
}
.topic p { font-size: 13.5px; color: var(--ink-2); line-height: 1.7; flex: 1; }
.topic__n {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted);
}

/* ---------- 11. 页面头 ---------- */
.page-head { padding: 56px 0 36px; border-bottom: 1px solid var(--line); }
.page-head h1 {
  font-family: var(--serif);
  font-size: clamp(29px, 4.2vw, 42px);
  font-weight: 700;
  line-height: 1.18;
  margin-top: 12px;
  text-wrap: balance;
}
.page-head p { margin-top: 16px; color: var(--ink-2); max-width: 60ch; font-size: 15.5px; }

.filters { display: flex; flex-wrap: wrap; gap: 8px; padding: 26px 0 6px; }
.chip {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: .06em;
  padding: 6px 13px;
  border: 1px solid var(--line);
  border-radius: 100px;
  color: var(--ink-2);
  background: transparent;
  transition: all .16s;
}
.chip:hover { border-color: var(--ink); color: var(--ink); }
.chip[aria-pressed="true"] { background: var(--ink); border-color: var(--ink); color: var(--bg); }

.rows { border-top: 1px solid var(--line); margin-top: 22px; }
.row {
  display: grid;
  grid-template-columns: 58px minmax(0, 1fr) auto 96px;
  gap: 18px;
  align-items: baseline;
  padding: 22px 4px;
  border-bottom: 1px solid var(--line-soft);
  text-decoration: none;
  color: inherit;
  transition: background .16s, padding-left .16s;
}
.row:hover { background: #fffdf9; padding-left: 12px; text-decoration: none; }
.row__no { font-family: var(--mono); font-size: 11.5px; color: var(--muted); letter-spacing: .08em; }
.row__body h3 { font-family: var(--serif); font-size: 18.5px; font-weight: 700; line-height: 1.5; }
.row__body p { font-size: 13.5px; color: var(--muted); margin-top: 5px; line-height: 1.65; }
.row__lang {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .1em;
  color: var(--accent-ink);
  white-space: nowrap;
}
.row__date {
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--muted);
  text-align: right;
  letter-spacing: .03em;
}

/* ---------- 12. 文章 ---------- */
.article { padding: 40px 0 20px; }
.crumb {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--muted);
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}
.crumb a { color: var(--muted); }
.crumb a:hover { color: var(--accent-ink); }
.crumb i { font-style: normal; opacity: .5; }
.article__head { max-width: 47rem; }
.article__head h1 {
  font-family: var(--serif);
  font-size: clamp(27px, 4vw, 40px);
  line-height: 1.3;
  font-weight: 700;
  letter-spacing: -.005em;
  margin-bottom: 20px;
  text-wrap: balance;
}
.meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 16px;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: .04em;
  color: var(--muted);
  padding-bottom: 24px;
  border-bottom: 1px solid var(--line);
}
.meta b { font-weight: 400; color: var(--ink-2); }
.tag {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .08em;
  color: var(--accent-ink);
  background: var(--accent-bg);
  padding: 2px 8px;
  border-radius: 2px;
}
.tag--cool { color: var(--cool); background: var(--cool-bg); }

.prose { max-width: 47rem; padding-top: 32px; }
.prose > p { margin: 0 0 20px; color: var(--ink-2); font-size: 16px; }
.prose > p:first-of-type { font-size: 17px; color: var(--ink); }
.prose h2 {
  font-family: var(--serif);
  font-size: 23.5px;
  font-weight: 700;
  line-height: 1.4;
  margin: 44px 0 16px;
  scroll-margin-top: 84px;
}
.prose h2::before {
  content: "§";
  font-family: var(--mono);
  font-size: 14px;
  color: var(--accent);
  margin-right: 10px;
  vertical-align: 2px;
}
.prose h3 {
  font-family: var(--sans);
  font-size: 16.5px;
  font-weight: 650;
  margin: 28px 0 12px;
}
.prose ul, .prose ol { margin: 0 0 20px; padding-left: 22px; color: var(--ink-2); }
.prose li { margin-bottom: 8px; }
.prose li::marker { color: var(--accent); font-family: var(--mono); font-size: .9em; }
.prose strong { color: var(--ink); font-weight: 650; }
.prose code {
  font-family: var(--mono);
  font-size: .885em;
  background: var(--bg-sunken);
  border: 1px solid var(--line);
  border-radius: 2px;
  padding: 1px 5px;
  color: var(--accent-ink);
  white-space: nowrap;
}
.prose blockquote {
  margin: 24px 0;
  padding: 4px 0 4px 20px;
  border-left: 2px solid var(--accent);
  color: var(--ink-2);
  font-size: 15.5px;
}
.note {
  margin: 26px 0;
  padding: 18px 20px;
  background: var(--bg-raise);
  border: 1px solid var(--line);
  border-left: 3px solid var(--ok);
  border-radius: 0 var(--r) var(--r) 0;
}
.note__t {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--ok);
  margin-bottom: 8px;
}
.note p { font-size: 14.5px; color: var(--ink-2); line-height: 1.72; }
.note p + p { margin-top: 10px; }
.note--warn { border-left-color: var(--accent); }
.note--warn .note__t { color: var(--accent); }
.note code {
  font-family: var(--mono);
  font-size: .88em;
  background: var(--bg-sunken);
  padding: 1px 5px;
  border-radius: 2px;
  color: var(--accent-ink);
}

.table-wrap { overflow-x: auto; margin: 24px 0; border: 1px solid var(--line); }
table { border-collapse: collapse; width: 100%; font-size: 14px; background: var(--bg-raise); }
th, td { text-align: left; padding: 11px 14px; border-bottom: 1px solid var(--line-soft); }
th {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--muted);
  background: var(--bg-sunken);
  border-bottom-color: var(--line);
  font-weight: 400;
  white-space: nowrap;
}
td { color: var(--ink-2); }
tbody tr:last-child td { border-bottom: 0; }
td code { font-family: var(--mono); font-size: 12.5px; color: var(--accent-ink); }

/* 代码块 */
.code {
  background: var(--code-bg);
  border-radius: 4px;
  overflow: hidden;
  margin: 18px 0;
  border: 1px solid #34322c;
}
.code__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 8px 12px 8px 14px;
  background: #26251f;
  border-bottom: 1px solid #34322c;
}
.code__name {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .05em;
  color: #9a9384;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.code__copy {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .1em;
  color: #8d8778;
  padding: 3px 8px;
  border: 1px solid #3d3a33;
  border-radius: 2px;
  transition: color .16s, border-color .16s, background .16s;
  flex: none;
}
.code__copy:hover { color: #f1ece1; border-color: #6a6559; background: #302e28; }
.code__copy.is-done { color: #9dc7a9; border-color: #4b6b52; }
.code pre {
  margin: 0;
  padding: 16px 16px 18px;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.8;
  color: var(--code-ink);
  tab-size: 2;
}
.code pre::-webkit-scrollbar { height: 9px; }
.code pre::-webkit-scrollbar-thumb { background: #45423a; border-radius: 9px; }
.code pre::-webkit-scrollbar-track { background: #232220; }

.tok-c { color: #7e786a; font-style: italic; }
.tok-k { color: #d98b6a; }
.tok-s { color: #a8bd8c; }
.tok-n { color: #d8b073; }
.tok-f { color: #8fb2c9; }

/* 来源说明 */
.sources {
  margin: 40px 0 0;
  padding: 20px 22px;
  background: var(--bg-sunken);
  border-radius: var(--r);
}
.sources__t {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 12px;
}
.sources ol { margin: 0; padding-left: 20px; }
.sources li {
  font-size: 13px;
  color: var(--ink-2);
  line-height: 1.7;
  margin-bottom: 6px;
}
.sources li::marker { color: var(--accent); font-family: var(--mono); }
.sources a { color: var(--accent-ink); word-break: break-all; }

.pager {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  margin: 56px 0 0;
}
.pager a { background: var(--bg-raise); padding: 20px 22px; text-decoration: none; color: inherit; transition: background .16s; }
.pager a:hover { background: #fffdf9; text-decoration: none; }
.pager a:last-child { text-align: right; }
.pager small {
  display: block;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 6px;
}
.pager b { font-family: var(--serif); font-size: 16px; font-weight: 700; line-height: 1.45; }

/* ---------- 13. 关于页 ---------- */
.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
  gap: 58px;
  align-items: start;
  padding: 50px 0 20px;
}
.about-grid .prose { padding-top: 0; max-width: none; }
.facts { border-top: 1px solid var(--line); }
.facts__row {
  display: grid;
  grid-template-columns: 68px minmax(0, 1fr);
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line-soft);
  font-size: 14px;
}
.facts__k {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .04em;
  color: var(--muted);
  text-transform: uppercase;
  padding-top: 3px;
  white-space: nowrap;
}
.facts__v { color: var(--ink-2); overflow-wrap: anywhere; }
.facts__v b { display: block; color: var(--ink); font-weight: 600; }
.stack { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 4px; }
.stack span {
  font-family: var(--mono);
  font-size: 11px;
  padding: 2px 8px;
  border: 1px solid var(--line);
  border-radius: 2px;
  color: var(--ink-2);
  background: var(--bg-raise);
}
.aside-note {
  margin-top: 28px;
  padding: 20px;
  background: var(--bg-sunken);
  border-radius: var(--r);
  font-size: 13.5px;
  color: var(--ink-2);
  line-height: 1.75;
}
.aside-note b {
  display: block;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 400;
  margin-bottom: 8px;
}

/* ---------- 14. Footer ---------- */
.site-foot {
  background: var(--bg-sunken);
  border-top: 1px solid var(--line);
  padding: 50px 0 0;
  font-size: 14px;
}
.foot__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.7fr) repeat(2, minmax(0, 1fr));
  gap: 40px;
  padding-bottom: 40px;
}
.foot__brand .brand { margin-bottom: 14px; }
.foot__brand p { color: var(--muted); font-size: 13.5px; max-width: 38ch; line-height: 1.75; }
.foot h3 {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 400;
  margin-bottom: 14px;
}
.foot ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 9px; }
.foot ul a, .foot ul span { color: var(--ink-2); font-size: 13.5px; }
.foot ul a:hover { color: var(--accent-ink); }
.foot__bottom {
  border-top: 1px solid var(--line);
  padding: 18px 0 22px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 6px 18px;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: .03em;
  color: var(--muted);
}
.foot__bottom a { color: var(--muted); }
.foot__bottom a:hover { color: var(--accent-ink); }

/* ---------- 15. 动画 ---------- */
/* 只做轻微位移，不改变不透明度：保证内容在任何渲染环境下都可见 */
@media (prefers-reduced-motion: no-preference) {
  html.js .reveal {
    transform: translateY(10px);
    transition: transform .55s cubic-bezier(.2, .7, .3, 1);
  }
  html.js .reveal.is-in { transform: none; }
}

/* ---------- 16. 响应式 ---------- */
@media (max-width: 940px) {
  .hero__grid { grid-template-columns: 1fr; gap: 38px; }
  .hero { padding: 48px 0 46px; }
  .about-grid { grid-template-columns: 1fr; gap: 38px; }
  .foot__grid { grid-template-columns: 1fr 1fr; }
  .foot__brand { grid-column: 1 / -1; }
  .row { grid-template-columns: 44px minmax(0, 1fr); gap: 12px; }
  .row__lang { display: none; }
  .row__date { grid-column: 2; text-align: left; }
}
@media (max-width: 680px) {
  :root { --gut: 20px; }
  .nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px; height: 34px;
    border: 1px solid var(--line);
    border-radius: 2px;
  }
  .nav-toggle span { display: block; width: 15px; height: 1.5px; background: var(--ink); position: relative; }
  .nav-toggle span::before, .nav-toggle span::after {
    content: "";
    position: absolute;
    left: 0;
    width: 15px; height: 1.5px;
    background: var(--ink);
  }
  .nav-toggle span::before { top: -5px; }
  .nav-toggle span::after { top: 5px; }
  .nav {
    position: absolute;
    top: 66px; left: 0; right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    align-items: stretch;
    padding: 8px var(--gut) 16px;
    gap: 2px;
    display: none;
  }
  .nav.is-open { display: flex; }
  .nav a { padding: 11px 4px; font-size: 12.5px; }
  .nav__tag { margin-left: 0; margin-top: 6px; text-align: center; }
  .sec { padding: 46px 0; }
  .sec__head { flex-direction: column; align-items: flex-start; gap: 12px; margin-bottom: 26px; }
  .cards { grid-template-columns: 1fr; }
  .pager { grid-template-columns: 1fr; }
  .pager a:last-child { text-align: left; }
  .foot__grid { grid-template-columns: 1fr; gap: 28px; padding-bottom: 32px; }
  .foot__bottom { flex-direction: column; align-items: flex-start; gap: 6px; }
  .code pre { font-size: 12px; }
  .hero h1 { font-size: clamp(26px, 6.8vw, 33px); line-height: 1.3; }
  .hero__lede { font-size: 15px; }
  .page-head h1 { font-size: clamp(26px, 7vw, 33px); }
  .digest__row { grid-template-columns: 68px minmax(0, 1fr); gap: 10px; }
  .digest__tag { display: none; }
  .signals__item { grid-template-columns: 46px minmax(0, 1fr); }
}

/* ---------- 17. 打印 ---------- */
@media print {
  .site-head, .site-foot, .pager, .code__copy { display: none; }
  body::before { display: none; }
  body { background: #fff; }
  .code { border: 1px solid #ccc; background: #f6f6f6; }
  .code pre, .code pre * { color: #222 !important; }
}