/* ============================================================
   6686主页 · /assets/site.css
   共享外壳：reset / 变量 / 中文排版 / 页头 / 页脚 / 按钮 /
   面包屑 / 容器 / 栅格 / 基础组件
   ============================================================ */

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

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body,
h1, h2, h3, h4, h5, p, ul, ol, li, figure, blockquote, dl, dd, table { margin: 0; }

ul, ol { padding: 0; list-style: none; }

img, svg, picture { display: block; max-width: 100%; }

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

a { color: inherit; }

table { border-collapse: collapse; }

#main-content { scroll-margin-top: 132px; }
main:focus { outline: none; }

/* ---------- 2. 变量 ---------- */
:root {
  --blue-900: #0A1C2E;
  --blue-700: #12324D;
  --blue-500: #1F5B7A;
  --mist: #E9EEF3;
  --paper: #F6F1E8;
  --orange: #D2732F;
  --orange-deep: #A9551C;
  --cyan: #24E0C8;
  --teal: #0E7C6B;
  --graphite: #5C6B78;
  --ink: #101820;

  --line: rgba(16, 24, 32, .16);
  --line-soft: rgba(16, 24, 32, .09);
  --line-invert: rgba(233, 238, 243, .24);

  --font-display: "Saira Condensed", "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "IBM Plex Mono", "Roboto Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --shell: 1240px;
  --gutter: clamp(18px, 4vw, 48px);
  --ease: cubic-bezier(.2, .7, .3, 1);
}

/* ---------- 3. 中文排版基底 ---------- */
body {
  background: var(--mist);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.75;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection { background: var(--cyan); color: var(--blue-900); }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: .04em;
  line-height: 1.12;
  color: var(--ink);
}

p { max-width: 38ch; }

strong { font-weight: 700; }

.display {
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: .04em;
  line-height: 1.05;
  font-size: clamp(40px, 6.4vw, 68px);
}

.title-lg { font-size: clamp(30px, 4.4vw, 48px); line-height: 1.1; }
.title-md { font-size: clamp(22px, 2.6vw, 34px); line-height: 1.15; }
.title-sm { font-size: 19px; line-height: 1.3; }

.lede {
  font-size: 17px;
  line-height: 1.75;
  color: var(--graphite);
  max-width: 38ch;
}

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: .06em;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--teal);
}

.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: var(--orange);
  flex: none;
}

.rule {
  height: 1px;
  border: 0;
  background: var(--line);
}

/* ---------- 4. 焦点与跳转 ---------- */
:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.skip-link {
  position: absolute;
  top: -72px;
  left: 16px;
  z-index: 300;
  display: inline-block;
  padding: 12px 20px;
  background: var(--ink);
  color: var(--mist);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  text-decoration: none;
  transition: top .16s var(--ease);
}

.skip-link:focus,
.skip-link:focus-visible { top: 10px; }

/* ---------- 5. 容器与栅格 ---------- */
.shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding-block: clamp(48px, 7vw, 88px); }
.section--paper { background: var(--paper); }
.section--deep { background: var(--blue-900); color: rgba(233, 238, 243, .86); }
.section--deep h2,
.section--deep h3 { color: var(--mist); }

.grid {
  display: grid;
  gap: clamp(20px, 3vw, 36px);
}

.grid--7-5 { grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); }
.grid--8-4 { grid-template-columns: minmax(0, 8fr) minmax(0, 4fr); }
.grid--5-7 { grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }

/* ---------- 6. 页头 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 120;
  background: var(--mist);
  border-bottom: 1px solid var(--line);
}

/* 6.1 信息条 */
.utility-bar {
  background: var(--blue-900);
  color: rgba(233, 238, 243, .78);
  box-shadow: inset 0 -1px 0 rgba(36, 224, 200, .34);
}

.utility-bar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 36px;
}

.utility-list {
  display: flex;
  align-items: center;
  gap: 0;
  overflow-x: auto;
  scrollbar-width: none;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .08em;
  white-space: nowrap;
}

.utility-list::-webkit-scrollbar { display: none; }

.utility-list__item {
  padding: 8px 18px 8px 0;
  border-right: 1px solid var(--line-invert);
  margin-right: 18px;
}

.utility-list__item:last-child {
  border-right: 0;
  margin-right: 0;
  padding-right: 0;
}

.utility-bar__stamp {
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--cyan);
  flex: none;
}

/* 6.2 品牌行 */
.masthead { background: var(--mist); }

.masthead__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding-block: 14px;
}

.brand {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding-left: 16px;
  text-decoration: none;
  color: var(--ink);
}

.brand::before {
  content: "";
  position: absolute;
  left: 0;
  top: 2px;
  bottom: 2px;
  width: 4px;
  background: var(--orange);
}

.brand__mark {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 3vw, 30px);
  line-height: 1;
  letter-spacing: .04em;
}

.brand__subline {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--graphite);
}

.brand:hover .brand__mark { color: var(--blue-700); }
.brand:hover .brand__subline { color: var(--orange-deep); }

.masthead__aside {
  display: flex;
  align-items: center;
  gap: 16px;
}

.masthead__coords {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--graphite);
}

.masthead__coords::before {
  content: "";
  width: 26px;
  height: 1px;
  background: var(--cyan);
}

.masthead__cta { flex: none; }

/* 6.3 移动索引舱开关 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  min-height: 48px;
  min-width: 48px;
  padding: 0 14px;
  border: 1px solid var(--blue-500);
  background: transparent;
  color: var(--blue-900);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  cursor: pointer;
  transition: border-color .16s var(--ease), box-shadow .16s var(--ease);
}

.nav-toggle:hover {
  border-color: var(--orange);
  box-shadow: inset 3px 0 0 var(--cyan);
}

.nav-toggle__bars {
  display: block;
  position: relative;
  width: 18px;
  height: 2px;
  background: currentColor;
  transition: background .16s var(--ease);
}

.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background: currentColor;
  transition: transform .16s var(--ease);
}

.nav-toggle__bars::before { top: -6px; }
.nav-toggle__bars::after { top: 6px; }

.nav-toggle[aria-expanded="true"] .nav-toggle__bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after { transform: translateY(-6px) rotate(-45deg); }

.nav-toggle__label { line-height: 1; }

/* 6.4 栏目索引条 */
.site-nav {
  background: var(--paper);
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line);
}

.site-nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.nav-index {
  display: flex;
  align-items: stretch;
  flex: 1;
  min-width: 0;
}

.nav-index__item + .nav-index__item { border-left: 1px solid var(--line-soft); }

.nav-index__link {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 9px;
  min-height: 48px;
  padding: 15px 18px;
  color: var(--ink);
  font-size: 15px;
  text-decoration: none;
  transition: transform .16s var(--ease), background-color .16s var(--ease), box-shadow .16s var(--ease);
}

.nav-index__num {
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--blue-500);
  transition: color .16s var(--ease);
}

.nav-index__link:hover {
  transform: translateY(-2px);
  background: #fff;
  box-shadow: inset 3px 0 0 var(--cyan), inset 0 0 0 1px var(--orange);
}

.nav-index__link:hover .nav-index__num { color: var(--orange-deep); }

.nav-index__link[aria-current="page"] {
  font-weight: 700;
  box-shadow: inset 0 -2px 0 var(--cyan);
  background: rgba(36, 224, 200, .1);
}

.nav-index__link[aria-current="page"] .nav-index__num { color: var(--teal); }

.nav-index__note {
  flex: none;
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--graphite);
  padding-left: 18px;
  border-left: 1px solid var(--line-soft);
}

/* 6.5 阅读进度发丝线 */
.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: rgba(16, 24, 32, .07);
  overflow: hidden;
  pointer-events: none;
}

.scroll-progress__bar {
  display: block;
  height: 100%;
  width: 100%;
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: 0 50%;
  will-change: transform;
}

/* ---------- 7. 页脚 ---------- */
.site-footer {
  position: relative;
  background: var(--blue-900);
  color: rgba(233, 238, 243, .82);
  overflow: hidden;
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(0deg, rgba(36, 224, 200, .06) 0 1px, transparent 1px 64px),
    repeating-linear-gradient(90deg, rgba(36, 224, 200, .06) 0 1px, transparent 1px 64px);
}

.site-footer > * { position: relative; z-index: 1; }

.footer-main { padding-block: clamp(40px, 6vw, 72px) clamp(28px, 4vw, 48px); }

.footer-grid {
  display: grid;
  grid-template-columns: minmax(240px, 1.6fr) repeat(3, minmax(0, 1fr));
  gap: clamp(26px, 4vw, 48px);
  align-items: start;
}

.footer-brand { display: flex; flex-direction: column; gap: 16px; }

.brand--footer { color: var(--mist); }
.brand--footer .brand__mark { color: var(--mist); }
.brand--footer .brand__subline { color: rgba(233, 238, 243, .6); }
.brand--footer:hover .brand__mark { color: var(--cyan); }
.brand--footer:hover .brand__subline { color: var(--cyan); }

.footer-brand__text {
  font-size: 14px;
  line-height: 1.75;
  color: rgba(233, 238, 243, .68);
  max-width: 30ch;
}

.footer-brand__cta { align-self: flex-start; margin-top: 4px; }

.footer-col { display: flex; flex-direction: column; gap: 14px; }

.footer-col__title {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--cyan);
}

.footer-col__title::after {
  content: "";
  flex: 1;
  height: 1px;
  background: rgba(36, 224, 200, .3);
}

.footer-list { display: flex; flex-direction: column; gap: 2px; }

.footer-list__link {
  display: inline-block;
  padding: 6px 0;
  font-size: 15px;
  color: rgba(233, 238, 243, .82);
  text-decoration: none;
  background-image: linear-gradient(var(--cyan), var(--cyan));
  background-repeat: no-repeat;
  background-position: 0 100%;
  background-size: 0 1px;
  transition: color .16s var(--ease), background-size .16s var(--ease), transform .16s var(--ease);
}

.footer-list__link:hover {
  color: #fff;
  background-size: 100% 1px;
  transform: translateX(-4px);
}

.footer-contact { display: flex; flex-direction: column; gap: 10px; }

.footer-contact__line {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(233, 238, 243, .78);
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  overflow-wrap: anywhere;
}

.footer-contact__key {
  flex: none;
  min-width: 40px;
  font-size: 10.5px;
  letter-spacing: .16em;
  color: var(--cyan);
  padding-top: 3px;
}

.footer-colophon { border-top: 1px solid rgba(233, 238, 243, .18); }

.footer-colophon__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px 28px;
  padding-block: 18px 26px;
  font-size: 12px;
  color: rgba(233, 238, 243, .58);
}

.footer-colophon__note {
  flex: 1 1 380px;
  max-width: 60ch;
  font-size: 12.5px;
  line-height: 1.7;
  border-left: 2px solid var(--orange);
  padding-left: 12px;
}

.footer-colophon__copy,
.footer-colophon__icp { font-size: 11.5px; letter-spacing: .1em; }

.footer-colophon__icp { color: rgba(233, 238, 243, .48); }

/* ---------- 8. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 48px;
  padding: 0 22px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .12em;
  text-decoration: none;
  border: 1px solid transparent;
  background: transparent;
  cursor: pointer;
  transition: transform .16s var(--ease), background-color .16s var(--ease),
              border-color .16s var(--ease), color .16s var(--ease), box-shadow .16s var(--ease);
}

.btn--primary {
  background: var(--orange);
  border-color: var(--orange);
  color: #fff;
}

.btn--primary:hover {
  background: var(--orange-deep);
  border-color: var(--orange-deep);
  transform: translateX(-4px);
  box-shadow: 4px 4px 0 rgba(10, 28, 46, .16);
}

.btn--line {
  border-color: var(--blue-500);
  color: var(--blue-900);
}

.btn--line:hover {
  border-color: var(--orange);
  box-shadow: inset 3px 0 0 var(--cyan);
  transform: translateX(-4px);
}

.btn--ghost {
  border-color: rgba(233, 238, 243, .35);
  color: var(--mist);
}

.btn--ghost:hover {
  border-color: var(--orange);
  color: #fff;
  box-shadow: inset 3px 0 0 var(--cyan);
  transform: translateX(-4px);
}

/* ---------- 9. 面包屑 ---------- */
.breadcrumb {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--graphite);
}

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.breadcrumb__item { display: flex; align-items: center; gap: 8px; }

.breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  color: var(--blue-500);
}

.breadcrumb__link {
  color: var(--graphite);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .16s var(--ease), border-color .16s var(--ease);
}

.breadcrumb__link:hover {
  color: var(--ink);
  border-bottom-color: var(--orange);
}

/* ---------- 10. 内页标题区 ---------- */
.page-head {
  padding-block: clamp(28px, 4.5vw, 56px);
  border-bottom: 1px solid var(--line);
  background: var(--mist);
}

.page-head__title { max-width: 22ch; }
.page-head__lede { margin-top: 18px; color: var(--graphite); }

/* ---------- 11. 基础组件 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--blue-700);
  background: var(--paper);
  border: 1px solid var(--line);
}

.tag--accent { color: var(--orange-deep); background: rgba(210, 115, 47, .12); border-color: var(--orange); }
.tag--live { color: var(--teal); background: rgba(36, 224, 200, .14); border-color: var(--cyan); }

.panel {
  background: var(--paper);
  border: 1px solid var(--line);
  padding: clamp(18px, 2.4vw, 28px);
}

.panel--deep {
  background: var(--blue-700);
  border-color: var(--blue-500);
  color: rgba(233, 238, 243, .86);
}

.callout {
  background: #fff;
  border: 1px solid var(--line);
  border-left: 3px solid var(--cyan);
  padding: 16px 20px;
  font-size: 15px;
  color: var(--graphite);
}

.index-list { display: flex; flex-direction: column; }

.index-row {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 16px;
  align-items: baseline;
  padding: 14px 0;
  border-bottom: 1px solid var(--line-soft);
  text-decoration: none;
  transition: transform .16s var(--ease), border-color .16s var(--ease), background-color .16s var(--ease);
}

.index-row:hover {
  transform: translateX(8px);
  border-bottom-color: var(--orange);
  background: rgba(246, 241, 232, .7);
}

.index-row__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--blue-500);
}

.index-row__label { font-weight: 700; }
.index-row__meta { font-size: 13px; color: var(--graphite); }

.fold {
  background: #fff;
  border: 1px solid var(--line);
}

.fold + .fold { margin-top: -1px; }

.fold__summary {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 16px 18px;
  min-height: 48px;
  font-weight: 700;
  cursor: pointer;
  list-style: none;
  transition: background-color .16s var(--ease), color .16s var(--ease);
}

.fold__summary::-webkit-details-marker { display: none; }

.fold__summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-weight: 400;
  color: var(--orange);
}

.fold[open] .fold__summary::after { content: "−"; }

.fold__summary:hover { background: var(--paper); }
.fold__summary:hover::after { color: var(--orange-deep); }

.fold__num {
  flex: none;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: .1em;
  color: var(--blue-500);
}

.fold__body {
  padding: 0 18px 18px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--graphite);
}

.table-wrap { width: 100%; overflow-x: auto; }

.table {
  width: 100%;
  min-width: 560px;
  background: #fff;
  font-size: 15px;
}

.table th,
.table td {
  border: 1px solid var(--line);
  padding: 12px 14px;
  text-align: left;
  vertical-align: top;
}

.table thead th {
  background: var(--blue-700);
  color: var(--mist);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: .1em;
}

.table tbody tr:nth-child(odd) { background: var(--paper); }
.table tbody th { background: var(--mist); color: var(--blue-900); font-weight: 700; }

/* 图片容器基础规则（页面阶段放实际图片） */
.media-frame {
  position: relative;
  overflow: hidden;
  background: var(--blue-700);
  border: 1px solid var(--line);
}

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(0deg, rgba(36, 224, 200, .12) 0 1px, transparent 1px 48px),
    repeating-linear-gradient(90deg, rgba(36, 224, 200, .12) 0 1px, transparent 1px 48px);
}

.media-frame__img {
  display: block;
  width: 100%;
  height: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.media-frame--wide { grid-column: 1 / -1; }
.media-frame--wide .media-frame__img { aspect-ratio: 21 / 9; }
.media-frame--tall .media-frame__img { aspect-ratio: 4 / 5; }

.media-frame__caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--graphite);
}

/* ---------- 12. 平板 ---------- */
@media (max-width: 1023px) {
  .masthead__coords { display: none; }

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

  .masthead__cta { display: none; }

  .site-nav {
    display: none;
    background: var(--blue-900);
    border-top: 1px solid var(--blue-500);
    border-bottom: 0;
  }

  .site-nav[data-open] {
    display: block;
    max-height: calc(100vh - 120px);
    overflow-y: auto;
  }

  .site-nav__inner { display: block; padding-inline: 0; }

  .nav-index { flex-direction: column; }

  .nav-index__item + .nav-index__item {
    border-left: 0;
    border-top: 1px solid rgba(233, 238, 243, .14);
  }

  .nav-index__link {
    align-items: center;
    min-height: 52px;
    padding: 14px var(--gutter);
    color: var(--mist);
    font-size: 16px;
  }

  .nav-index__num { color: var(--cyan); }

  .nav-index__link:hover {
    transform: none;
    background: rgba(36, 224, 200, .08);
    box-shadow: inset 3px 0 0 var(--cyan);
  }

  .nav-index__link[aria-current="page"] {
    background: rgba(36, 224, 200, .14);
    box-shadow: inset 3px 0 0 var(--cyan);
    color: #fff;
  }

  .nav-index__link[aria-current="page"] .nav-index__num { color: var(--cyan); }

  .nav-index__note {
    display: block;
    border-left: 0;
    border-top: 1px solid rgba(233, 238, 243, .14);
    padding: 12px var(--gutter) 16px;
    color: rgba(233, 238, 243, .5);
  }

  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-brand { grid-column: 1 / -1; }

  .grid--7-5,
  .grid--8-4,
  .grid--5-7,
  .grid--3 { grid-template-columns: minmax(0, 1fr); }
}

/* ---------- 13. 手机 ---------- */
@media (max-width: 719px) {
  body { font-size: 16px; }

  .utility-list { font-size: 10.5px; }
  .utility-bar__stamp { display: none; }

  .masthead__inner { padding-block: 12px; gap: 14px; }
  .brand { padding-left: 12px; }
  .brand::before { width: 3px; }

  .nav-toggle { padding: 0 12px; }

  .grid--2 { grid-template-columns: minmax(0, 1fr); }

  .footer-grid { grid-template-columns: minmax(0, 1fr); gap: 28px; }

  .footer-colophon__inner { flex-direction: column; align-items: flex-start; gap: 10px; }

  .index-row { grid-template-columns: auto minmax(0, 1fr); }
  .index-row__meta { grid-column: 2; }
}

/* ---------- 14. 减弱动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

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

  .nav-index__link:hover,
  .index-row:hover,
  .footer-list__link:hover,
  .btn:hover { transform: none; }
}