/* ============================================================
   财神棋牌局 · 官方中文站 共享样式表  /assets/site.css
   设计轴：纵向叙事长卷 · 双层信息导航 · 对角错位色块 · 印章与卷轴
   ============================================================ */

/* ---------- 1. Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--topbar-h) + 88px);
}

body { margin: 0; }

h1, h2, h3, h4, h5, p, ul, ol, figure, blockquote, dl, dd { margin: 0; }
ul, ol { list-style: none; padding: 0; }
img, svg, video { display: block; max-width: 100%; }

button {
  background: none;
  border: 0;
  padding: 0;
  font: inherit;
  color: inherit;
  cursor: pointer;
}

input, select, textarea { font: inherit; color: inherit; }
a { color: inherit; text-decoration: none; }
summary { cursor: pointer; list-style: none; }
summary::-webkit-details-marker { display: none; }

/* ---------- 2. 设计变量 ---------- */
:root {
  --red: #B3122B;
  --red-deep: #7A0C1E;
  --gold: #D8A94A;
  --amber-a: #E9B95C;
  --amber-b: #C8862C;
  --ink: #16110F;
  --ink-2: #241B18;
  --jade-white: #F6F1E7;
  --paper: #EDE4D4;
  --line: #C9BFA8;
  --jade: #3E7C74;
  --jade-soft: #A8C9C2;

  --amber-grad: linear-gradient(120deg, var(--amber-a) 0%, var(--amber-b) 100%);

  --font-display: "Songti SC", "STZhongsong", "Source Han Serif SC", "Noto Serif SC", "SimSun", serif;
  --font-body: "PingFang SC", "Noto Sans SC", "Source Han Sans SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
  --font-mono: ui-monospace, "JetBrains Mono", "SF Mono", Menlo, Consolas, monospace;

  --shell-w: 1280px;
  --gutter: clamp(16px, 4vw, 32px);
  --r-organic: 4px 26px 4px 26px;
  --r-soft: 14px;
  --r-chip: 999px;

  --shadow-1: 0 1px 2px rgba(22, 17, 15, .08), 0 12px 26px -20px rgba(22, 17, 15, .55);
  --shadow-2: 0 2px 4px rgba(22, 17, 15, .12), 0 26px 44px -26px rgba(122, 12, 30, .6);

  --topbar-h: 44px;
  --ease: cubic-bezier(.24, .6, .24, 1);
}

@media (max-width: 720px) {
  :root { --topbar-h: 38px; }
}

/* ---------- 3. 基础排版 ---------- */
body {
  font-family: var(--font-body);
  font-size: clamp(16px, 15.2px + .22vw, 18px);
  font-weight: 400;
  line-height: 1.75;
  color: var(--ink);
  background: var(--jade-white);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: .02em;
}

h1 { font-size: clamp(2.2rem, 5vw, 4.6rem); }
h2 { font-size: clamp(1.6rem, 3vw, 2.5rem); }
h3 { font-size: clamp(1.125rem, 1.6vw, 1.4rem); font-weight: 700; }
h4 { font-size: 1rem; font-weight: 700; }

strong { font-weight: 700; }

:where(a, button, summary, input, select, textarea, [tabindex]):focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 2px;
  box-shadow: 0 0 0 1px rgba(246, 241, 231, .92);
}

/* ---------- 4. 布局骨架 ---------- */
.shell {
  width: 100%;
  max-width: var(--shell-w);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.grid { display: grid; gap: clamp(18px, 2.4vw, 28px); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid--split { grid-template-columns: 7fr 4fr; }
.grid--split-rev { grid-template-columns: 5fr 6fr; }

/* ---------- 5. 页头 · 双层导航 ---------- */
.skip-link {
  position: absolute;
  left: var(--gutter);
  top: 0;
  z-index: 200;
  transform: translateY(-160%);
  padding: 10px 20px;
  background: var(--ink);
  color: var(--jade-white);
  font-size: .875rem;
  letter-spacing: .08em;
  border-radius: 0 0 var(--r-soft) var(--r-soft);
  transition: transform .18s var(--ease);
}

.skip-link:focus,
.skip-link:focus-visible { transform: translateY(0); }

.site-header {
  position: sticky;
  top: calc(var(--topbar-h) * -1);
  z-index: 90;
}

.header-top {
  background: var(--ink-2);
  border-bottom: 1px solid rgba(216, 169, 74, .22);
}

.header-top__inner {
  height: var(--topbar-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.header-top__meta {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  overflow: hidden;
  white-space: nowrap;
  font-size: .75rem;
  letter-spacing: .1em;
  color: rgba(246, 241, 231, .68);
}

.header-top__meta::before {
  content: "";
  flex: none;
  width: 6px;
  height: 6px;
  background: var(--gold);
  transform: rotate(45deg);
  border-radius: 1px;
}

.header-top__seg + .header-top__seg::before {
  content: "·";
  margin-right: 10px;
  color: rgba(216, 169, 74, .55);
}

.header-top__quick {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: none;
}

.quick-link {
  padding: 4px 12px;
  font-size: .75rem;
  letter-spacing: .1em;
  color: var(--gold);
  border: 1px solid rgba(216, 169, 74, .42);
  border-radius: var(--r-chip);
  transition: background-color .16s var(--ease), color .16s var(--ease), border-color .16s var(--ease);
}

.quick-link:hover,
.quick-link:focus-visible {
  background: var(--gold);
  color: var(--ink);
  border-color: var(--gold);
}

.header-bar {
  position: relative;
  background: linear-gradient(180deg, #BB1430 0%, var(--red) 48%, #9E0F26 100%);
  border-bottom: 2px solid var(--gold);
  box-shadow: 0 16px 28px -24px rgba(22, 17, 15, .95);
}

.header-bar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 70px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 0;
  flex: none;
}

.brand__seal {
  width: 42px;
  height: 42px;
  flex: none;
  display: grid;
  place-items: center;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.4rem;
  line-height: 1;
  color: var(--gold);
  background: rgba(122, 12, 30, .58);
  border: 2px solid var(--gold);
  border-radius: 3px 12px 3px 12px;
  box-shadow: inset 0 0 0 1px rgba(246, 241, 231, .14);
}

.brand__text { display: flex; flex-direction: column; gap: 2px; min-width: 0; }

.brand__name {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.25rem;
  line-height: 1.1;
  letter-spacing: .12em;
  color: var(--jade-white);
}

.brand__sub {
  font-size: .6875rem;
  letter-spacing: .1em;
  color: rgba(246, 241, 231, .66);
  white-space: nowrap;
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 8px 14px;
  font-size: .8125rem;
  letter-spacing: .12em;
  color: var(--jade-white);
  border: 1px solid rgba(216, 169, 74, .5);
  border-radius: var(--r-chip);
  transition: background-color .16s var(--ease), color .16s var(--ease);
}

.nav-toggle:hover { background: rgba(216, 169, 74, .18); }

.nav-toggle__bars { display: flex; flex-direction: column; gap: 4px; width: 18px; }

.nav-toggle__bars i {
  display: block;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  transition: transform .2s var(--ease), opacity .2s var(--ease);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

.site-nav__list {
  display: flex;
  align-items: center;
  gap: clamp(6px, 1.4vw, 26px);
}

.site-nav__link {
  position: relative;
  display: block;
  padding: 12px 4px;
  font-size: .9375rem;
  font-weight: 500;
  letter-spacing: .08em;
  color: rgba(246, 241, 231, .82);
  transition: color .16s var(--ease);
}

.site-nav__link::after {
  content: "";
  position: absolute;
  left: 4px;
  right: 4px;
  bottom: 8px;
  height: 2px;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .2s var(--ease);
}

.site-nav__link:hover { color: #fff; }
.site-nav__link:hover::after { transform: scaleX(1); }

.site-nav__link[aria-current="page"] { color: #fff; font-weight: 700; }
.site-nav__link[aria-current="page"]::after { transform: scaleX(1); }

.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: rgba(22, 17, 15, .3);
  pointer-events: none;
}

.scroll-progress::before {
  content: "";
  display: block;
  height: 100%;
  width: 100%;
  transform-origin: left center;
  transform: scaleX(var(--progress, 0));
  background: linear-gradient(90deg, var(--gold), var(--amber-a));
  transition: transform .12s linear;
}

/* ---------- 6. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(56px, 8vw, 110px);
  background: var(--ink-2);
  color: rgba(246, 241, 231, .76);
  font-size: .9375rem;
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 5px;
  background: linear-gradient(90deg, var(--red-deep) 0%, var(--gold) 36%, var(--amber-a) 64%, var(--red-deep) 100%);
}

.footer__grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1.55fr 1fr;
  gap: clamp(24px, 3vw, 44px);
  padding-block: clamp(38px, 5vw, 66px);
}

.footer__seal {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  margin-bottom: 12px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.1rem;
  line-height: 1;
  color: var(--gold);
  border: 1px solid var(--gold);
  border-radius: 3px 10px 3px 10px;
}

.footer__name {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.35rem;
  letter-spacing: .14em;
  color: var(--jade-white);
}

.footer__brief {
  margin-top: 8px;
  max-width: 22em;
  font-size: .8125rem;
  line-height: 1.9;
  color: rgba(246, 241, 231, .6);
}

.footer__brief--dim { color: rgba(246, 241, 231, .42); }

.footer__col-title {
  padding-bottom: 10px;
  margin-bottom: 16px;
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .24em;
  color: var(--gold);
  border-bottom: 1px solid rgba(216, 169, 74, .25);
}

.footer__list { display: flex; flex-direction: column; gap: 10px; }
.footer__list--rows { gap: 12px; }

.footer__link {
  display: inline-block;
  font-size: .875rem;
  color: rgba(246, 241, 231, .72);
  border-bottom: 1px solid transparent;
  transition: color .16s var(--ease), border-color .16s var(--ease);
}

.footer__link:hover,
.footer__link:focus-visible { color: var(--gold); border-bottom-color: var(--gold); }

.copy-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: .875rem;
}

.copy-row__key {
  flex: none;
  min-width: 4.5em;
  font-size: .75rem;
  letter-spacing: .12em;
  color: rgba(246, 241, 231, .5);
}

.copy-row__value {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: .8125rem;
  letter-spacing: .02em;
  color: var(--jade-white);
  word-break: break-all;
}

.copy-row--plain .copy-row__value {
  font-family: var(--font-body);
  font-weight: 400;
  font-size: .875rem;
  color: rgba(246, 241, 231, .72);
}

.copy-chip {
  padding: 2px 10px;
  font-size: .6875rem;
  letter-spacing: .1em;
  color: var(--gold);
  border: 1px solid rgba(216, 169, 74, .45);
  border-radius: var(--r-chip);
  transition: background-color .16s var(--ease), color .16s var(--ease), border-color .16s var(--ease);
}

.copy-chip:hover { background: var(--gold); color: var(--ink); border-color: var(--gold); }

.copy-chip[data-copied] {
  background: var(--jade);
  border-color: var(--jade);
  color: #fff;
}

.footer__entries {
  background: rgba(22, 17, 15, .5);
  border-top: 1px solid rgba(246, 241, 231, .1);
  border-bottom: 1px solid rgba(246, 241, 231, .1);
}

.footer__entries-inner {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px 16px;
  padding-block: 18px;
}

.entry-pill {
  display: inline-flex;
  align-items: center;
  padding: 9px 22px;
  font-size: .875rem;
  font-weight: 500;
  letter-spacing: .1em;
  color: var(--gold);
  background: transparent;
  border: 1px solid rgba(216, 169, 74, .55);
  border-radius: var(--r-chip);
  transition: background-color .16s var(--ease), color .16s var(--ease), transform .16s var(--ease);
}

.entry-pill:hover,
.entry-pill:focus-visible {
  background: var(--gold);
  color: var(--ink);
  transform: translateY(-2px);
}

.footer__entries-note {
  font-size: .75rem;
  letter-spacing: .06em;
  color: rgba(246, 241, 231, .45);
}

.footer__meta { background: rgba(22, 17, 15, .74); }

.footer__meta-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 26px;
  padding-block: 16px;
  font-size: .75rem;
  letter-spacing: .06em;
  color: rgba(246, 241, 231, .5);
}

.footer__meta-item { margin: 0; }

/* ---------- 7. 通用组件 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 26px;
  font-size: .9375rem;
  font-weight: 500;
  letter-spacing: .08em;
  border: 1px solid transparent;
  border-radius: var(--r-chip);
  transition: transform .16s var(--ease), background-color .16s var(--ease),
              color .16s var(--ease), border-color .16s var(--ease), box-shadow .16s var(--ease);
}

.btn--primary { background: var(--red); color: var(--jade-white); box-shadow: 0 14px 26px -20px rgba(179, 18, 43, .95); }
.btn--primary:hover { background: var(--red-deep); transform: translateY(-2px); }

.btn--gold { background: transparent; color: var(--red); border-color: var(--gold); }
.btn--gold:hover { background: var(--gold); color: var(--ink); transform: translateY(-2px); }

.btn--ink { background: var(--ink-2); color: var(--jade-white); }
.btn--ink:hover { background: var(--ink); transform: translateY(-2px); }

.btn--jade { background: var(--jade); color: #fff; }
.btn--jade:hover { background: #2F6159; transform: translateY(-2px); }

.btn--ghost { border-color: var(--line); color: var(--ink); }
.btn--ghost:hover { border-color: var(--gold); color: var(--red); transform: translateY(-2px); }

.btn--sm { padding: 8px 18px; font-size: .8125rem; }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 2px 8px 3px;
  font-size: .75rem;
  font-weight: 500;
  letter-spacing: .08em;
  color: var(--ink);
  border-bottom: 2px solid var(--gold);
}

.tag--amber { background: var(--amber-grad); border-bottom-color: transparent; border-radius: var(--r-chip); padding: 3px 12px; }
.tag--jade { color: var(--jade); border-bottom-color: var(--jade-soft); }
.tag--ink { background: var(--ink-2); color: var(--jade-white); border-bottom-color: transparent; border-radius: var(--r-chip); padding: 3px 12px; }

.card {
  position: relative;
  padding: clamp(18px, 2.4vw, 28px);
  background: var(--jade-white);
  border: 1px solid var(--line);
  border-radius: var(--r-organic);
  transition: transform .16s var(--ease), border-color .16s var(--ease), box-shadow .16s var(--ease);
}

.card:hover,
.card:focus-within {
  transform: translateY(-3px);
  border-color: var(--gold);
  box-shadow: var(--shadow-1);
}

.island {
  padding: clamp(20px, 3vw, 34px);
  background: var(--paper);
  border-left: 3px solid var(--gold);
  border-radius: var(--r-organic);
}

.island--ink {
  background: var(--ink-2);
  color: rgba(246, 241, 231, .82);
  border-left-color: var(--gold);
}

.band {
  padding: clamp(16px, 2.4vw, 26px) clamp(18px, 3vw, 34px);
  background: var(--ink-2);
  color: rgba(246, 241, 231, .84);
  border-left: 4px solid var(--gold);
  border-radius: 0 26px 26px 0;
}

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
  margin-bottom: clamp(20px, 3vw, 34px);
}

.section-head__index {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: .875rem;
  letter-spacing: .32em;
  color: var(--gold);
}

.section-head__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.6rem, 3vw, 2.5rem);
  line-height: 1.16;
}

.crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: .8125rem;
  letter-spacing: .06em;
  color: rgba(22, 17, 15, .6);
}

.crumbs__item { display: flex; align-items: center; gap: 8px; }
.crumbs__sep { color: var(--gold); }

.crumbs__link { border-bottom: 1px solid transparent; transition: color .16s var(--ease), border-color .16s var(--ease); }
.crumbs__link:hover { color: var(--red); border-bottom-color: var(--gold); }

.crumbs__current,
.crumbs__item[aria-current="page"] { color: var(--ink); font-weight: 500; }

.prose { max-width: 42em; }
.prose p + p { margin-top: 1.2em; }
.prose h2 { margin-top: 1.8em; margin-bottom: .6em; }
.prose h3 { margin-top: 1.6em; margin-bottom: .5em; }
.prose ul, .prose ol { display: flex; flex-direction: column; gap: .55em; margin-top: .9em; }
.prose li { position: relative; max-width: 40em; padding-left: 1.4em; }
.prose li::before {
  content: "";
  position: absolute;
  left: .35em;
  top: .78em;
  width: 6px;
  height: 6px;
  background: var(--gold);
  transform: rotate(45deg);
}
.prose a { color: var(--jade); border-bottom: 1px solid var(--jade-soft); }
.prose a:hover { color: var(--red); border-bottom-color: var(--gold); }

.num {
  font-family: var(--font-mono);
  font-weight: 600;
  letter-spacing: .04em;
  font-variant-numeric: tabular-nums;
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px 18px;
  background: var(--paper);
  border-top: 2px solid var(--gold);
  border-radius: var(--r-organic);
}

.stat__value {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 1.5rem;
  letter-spacing: .02em;
  color: var(--ink);
}

.stat__label { font-size: .75rem; letter-spacing: .1em; color: rgba(22, 17, 15, .6); }

.vert-note {
  writing-mode: vertical-rl;
  max-height: 9em;
  font-size: .75rem;
  letter-spacing: .34em;
  color: rgba(22, 17, 15, .5);
}

.vert-note--gold { color: var(--gold); }

.anchor-nav {
  position: sticky;
  top: calc(var(--topbar-h) + 78px);
  align-self: start;
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding-left: 14px;
  border-left: 1px solid var(--line);
}

.anchor-nav__link {
  display: block;
  padding: 6px 0;
  font-size: .8125rem;
  letter-spacing: .06em;
  color: rgba(22, 17, 15, .6);
  transition: color .16s var(--ease);
}

.anchor-nav__link::before {
  content: "";
  display: inline-block;
  width: 12px;
  height: 1px;
  margin-right: 8px;
  vertical-align: middle;
  background: var(--line);
  transition: width .16s var(--ease), background-color .16s var(--ease);
}

.anchor-nav__link:hover { color: var(--red); }

.anchor-nav__link[aria-current="true"] { color: var(--ink); font-weight: 700; }
.anchor-nav__link[aria-current="true"]::before { width: 22px; background: var(--gold); }

/* ---------- 8. 图片容器（页面阶段放占位图） ---------- */
.frame {
  position: relative;
  overflow: hidden;
  isolation: isolate;
  border-radius: var(--r-organic);
  background:
    radial-gradient(120% 120% at 22% 8%, rgba(216, 169, 74, .22) 0%, rgba(216, 169, 74, 0) 56%),
    linear-gradient(160deg, var(--ink-2) 0%, var(--ink) 100%);
}

.frame > img,
.frame > picture > img,
.frame > svg {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.frame[data-ratio="21x9"] { aspect-ratio: 21 / 9; }
.frame[data-ratio="16x9"] { aspect-ratio: 16 / 9; }
.frame[data-ratio="4x3"] { aspect-ratio: 4 / 3; }
.frame[data-ratio="1x1"] { aspect-ratio: 1 / 1; }
.frame[data-ratio="3x4"] { aspect-ratio: 3 / 4; }

.frame__caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 16px 18px 14px;
  font-size: .75rem;
  letter-spacing: .08em;
  color: rgba(246, 241, 231, .8);
  background: linear-gradient(0deg, rgba(22, 17, 15, .84), rgba(22, 17, 15, 0));
}

.frame--paper { background: var(--paper); border: 1px solid var(--line); }
.frame--paper .frame__caption { color: rgba(22, 17, 15, .72); background: linear-gradient(0deg, rgba(237, 228, 212, .9), rgba(237, 228, 212, 0)); }

/* ---------- 9. 显现动效 ---------- */
html.js-on [data-reveal] {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity .5s var(--ease), transform .5s var(--ease);
}

html.js-on [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 10. 响应式 ---------- */
@media (max-width: 1080px) {
  .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--split,
  .grid--split-rev { grid-template-columns: minmax(0, 1fr); }
  .footer__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer__brand { grid-column: 1 / -1; }
}

@media (max-width: 900px) {
  .header-bar__inner { min-height: 62px; }
  .brand__seal { width: 36px; height: 36px; font-size: 1.15rem; }
  .brand__name { font-size: 1.0625rem; letter-spacing: .08em; }
  .brand__sub { display: none; }

  .nav-toggle { display: inline-flex; }

  .site-nav {
    display: none;
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    max-height: min(72vh, 540px);
    overflow-y: auto;
    padding: 8px var(--gutter) 22px;
    background: var(--jade-white);
    border-bottom: 2px solid var(--gold);
    box-shadow: var(--shadow-2);
  }

  .site-nav[data-open] { display: block; }

  .site-nav__list { flex-direction: column; align-items: stretch; gap: 0; }

  .site-nav__link {
    padding: 15px 2px;
    font-size: 1rem;
    color: var(--ink);
    border-bottom: 1px solid var(--line);
  }

  .site-nav__link::after { display: none; }
  .site-nav__link:hover { color: var(--red); }

  .site-nav__link[aria-current="page"] {
    padding-left: 14px;
    color: var(--red);
    box-shadow: inset 3px 0 0 var(--gold);
  }

  .anchor-nav { position: static; border-left: 0; padding-left: 0; flex-direction: row; flex-wrap: wrap; gap: 6px 16px; }
  .anchor-nav__link::before { display: none; }
}

@media (max-width: 720px) {
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--2 { grid-template-columns: minmax(0, 1fr); }
  .footer__grid { grid-template-columns: minmax(0, 1fr); }
  .footer__entries-inner { align-items: stretch; }
  .entry-pill { flex: 1 1 auto; justify-content: center; }
  .footer__meta-inner { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 640px) {
  .header-top__seg--wide { display: none; }
  .header-top__meta { font-size: .6875rem; letter-spacing: .06em; }
  .quick-link { padding: 3px 9px; font-size: .6875rem; }
  .grid--3,
  .grid--4 { grid-template-columns: minmax(0, 1fr); }
}

/* ---------- 11. 动效克制 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; scroll-padding-top: 96px; }

  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }

  html.js-on [data-reveal] { opacity: 1; transform: none; }

  .card:hover,
  .card:focus-within,
  .btn:hover,
  .entry-pill:hover,
  .entry-pill:focus-visible { transform: none; }

  .scroll-progress::before { transition: none; }
}