:root {
  --color-surface: #f0efef;
  --color-surface-alt: #e9e7e7;
  --color-surface-deep: #dedddc;
  --color-ink: #5e5750;
  --color-ink-soft: #736c64;
  --color-ink-muted: #878078;
  --color-line: #d6d4d2;
  --color-primary: #807465;
  --color-primary-ink: #ffffff;
  --color-primary-soft: #e0dedc;
  --color-accent: #6d7a2e;
  --color-accent-ink: #ffffff;
  --color-highlight: #d8dacc;
  --color-focus: #616f20;
  --color-contrast-surface: #252321;
  --color-contrast-ink: #e7e6e4;
  --color-contrast-line: #504e4c;
  --color-contrast-accent: #a6b946;
  --overlay-scrim: linear-gradient(180deg, rgba(37, 35, 33, 0.35) 0%, rgba(37, 35, 33, 0.72) 55%, rgba(37, 35, 33, 0.92) 100%);
  --font-heading: "Songti SC", STSong, "Source Han Serif SC", SimSun, serif;
  --font-body: "Songti SC", STSong, "Source Han Serif SC", SimSun, serif;
  --font-mono: ui-monospace, Menlo, Consolas, monospace;
  --text-xs: 12.2px;
  --text-sm: 15.2px;
  --text-base: 17px;
  --text-lg: 21.2px;
  --text-xl: 26.6px;
  --text-2xl: 33.2px;
  --text-3xl: 41.5px;
  --text-4xl: 51.9px;
  --text-display: clamp(34px, 7.0vw, 89px);
  --text-figure: clamp(28px, 5.0vw, 64px);
  --weight-heading: 491;
  --weight-body: 400;
  --leading-body: 1.81;
  --leading-heading: 1.24;
  --tracking-heading: 0.022em;
  --radius-sm: 0px;
  --radius-md: 0px;
  --radius-lg: 1px;
  --radius-pill: 1px;
  --border-thin: 1px;
  --border-thick: 1px;
  --shadow-1: none;
  --shadow-2: none;
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-6: 48px;
  --space-8: 64px;
  --container: 1000px;
  --measure: 68ch;
  --gutter: 32px;
  --section-y: 104px;
  --section-y-lg: 146px;
}

/* ============================================================
   互博赛场 HOOBALL · 共享站点样式 /assets/site.css
   日式极简 × 深夜战术板：纸感低饱和、细字重、大留白、零阴影
   ============================================================ */

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
}
body, h1, h2, h3, h4, h5, p, ul, ol, li, figure, blockquote, dl, dd, table, th, td {
  margin: 0;
  padding: 0;
}
ul, ol { list-style: none; }
img, svg { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; }
button { background: none; border: 0; cursor: pointer; }
a { color: inherit; text-decoration: none; }
table { border-collapse: collapse; }
hr { border: 0; }

/* ---------- 基础排版 ---------- */
body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: var(--weight-body);
  line-height: var(--leading-body);
  letter-spacing: 0.01em;
  color: var(--color-ink);
  background-color: var(--color-surface);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
h1, h2, h3, h4, h5 {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}
h1 { font-size: var(--text-2xl); }
h2 { font-size: var(--text-xl); }
h3 { font-size: var(--text-lg); }
h4 { font-size: var(--text-base); }
@media (min-width: 720px) {
  h1 { font-size: var(--text-3xl); }
  h2 { font-size: var(--text-2xl); }
  h3 { font-size: var(--text-xl); }
  h4 { font-size: var(--text-lg); }
}
.num { font-variant-numeric: tabular-nums lining-nums; }
.mono { font-family: var(--font-mono); letter-spacing: 0.08em; }
.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* ---------- 布局骨架 ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--space-3);
}
.section { position: relative; padding-block: calc(var(--section-y) * 0.55); }
@media (min-width: 720px) { .section { padding-block: var(--section-y); } }
@media (min-width: 1080px) { .section--lg { padding-block: var(--section-y-lg); } }
.section--alt { background-color: var(--color-surface-alt); }
.section--deep { background-color: var(--color-surface-deep); }
.section--dark { background-color: var(--color-contrast-surface); color: var(--color-contrast-ink); }
.section--dark h1,
.section--dark h2,
.section--dark h3,
.section--dark h4,
.section--dark p { color: var(--color-contrast-ink); }
.section--dark .note { color: var(--color-contrast-ink); opacity: 0.7; }

.rule {
  height: 0;
  margin: 0;
  border-top: var(--border-thin) solid var(--color-line);
}
.rule--double {
  height: 5px;
  border-top: var(--border-thin) solid var(--color-line);
  border-bottom: var(--border-thin) solid var(--color-line);
  background-color: transparent;
}
.rule--on-dark { border-color: var(--color-contrast-line); }

.grid { display: grid; gap: var(--gutter); }
@media (min-width: 860px) {
  .grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--7-5 { grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); }
  .grid--8-3 { grid-template-columns: minmax(0, 8fr) minmax(0, 3fr); }
  .grid--5-4-3 { grid-template-columns: minmax(0, 5fr) minmax(0, 4fr) minmax(0, 3fr); }
}
.block { border-top: var(--border-thin) solid var(--color-line); padding-top: var(--space-4); }

/* ---------- 章节标题组 ---------- */
.section-head {
  display: grid;
  gap: var(--space-2);
  max-width: var(--measure);
  padding-left: var(--space-3);
  border-left: 3px solid var(--color-primary);
}
.section-head--accent { border-left-color: var(--color-accent); }
.section-head__index {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.24em;
  color: var(--color-ink-muted);
}
.section-head__title { font-size: var(--text-xl); }
.section-head__text { font-size: var(--text-base); color: var(--color-ink-soft); }
@media (min-width: 720px) { .section-head__title { font-size: var(--text-2xl); } }

/* ---------- 正文与记号 ---------- */
.prose { max-width: var(--measure); line-height: 1.5; color: var(--color-ink); }
.prose > * + * { margin-top: var(--space-3); }
.prose h2 { margin-top: var(--space-6); font-size: var(--text-xl); }
.prose h3 { margin-top: var(--space-4); font-size: var(--text-lg); }
.prose ul { display: grid; gap: var(--space-1); padding-left: var(--space-3); }
.prose ul li { position: relative; }
.prose ul li::before {
  content: "";
  position: absolute;
  left: calc(-1 * var(--space-3));
  top: 0.74em;
  width: 8px;
  height: 1px;
  background-color: var(--color-ink-muted);
}
.prose a {
  color: var(--color-ink);
  border-bottom: var(--border-thin) solid var(--color-line);
}
.prose a:hover { color: var(--color-accent); border-color: var(--color-accent); }

.note {
  font-size: var(--text-xs);
  line-height: 1.7;
  color: var(--color-ink-muted);
}
.marker { border-left: 3px solid var(--color-accent); padding-left: var(--space-3); }
.marker--primary { border-left-color: var(--color-primary); }

.display-1 {
  font-family: var(--font-heading);
  font-size: var(--text-display);
  font-weight: var(--weight-heading);
  line-height: 1.02;
  letter-spacing: 0.02em;
  font-variant-numeric: tabular-nums lining-nums;
  color: var(--color-ink);
}
.figure {
  font-family: var(--font-heading);
  font-size: var(--text-figure);
  font-weight: var(--weight-heading);
  line-height: 1;
  letter-spacing: 0.01em;
  font-variant-numeric: tabular-nums lining-nums;
  color: var(--color-ink);
}
.figure--accent { color: var(--color-accent); }
.figure__label {
  display: block;
  margin-top: var(--space-2);
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: var(--weight-body);
  letter-spacing: 0.14em;
  font-variant-numeric: normal;
  color: var(--color-ink-muted);
}
.section--dark .figure,
.section--dark .figure--accent { color: var(--color-contrast-accent); }
.section--dark .figure__label { color: var(--color-contrast-ink); opacity: 0.7; }

/* ---------- 动作 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  padding: 12px var(--space-3);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  letter-spacing: 0.12em;
  border: var(--border-thin) solid var(--color-primary);
  border-radius: var(--radius-sm);
  background-color: var(--color-primary);
  color: var(--color-primary-ink);
  transition: background-color 140ms ease-out, border-color 140ms ease-out, color 140ms ease-out;
}
.btn:hover {
  background-color: color-mix(in srgb, var(--color-primary) 74%, var(--color-contrast-surface));
  border-color: color-mix(in srgb, var(--color-primary) 74%, var(--color-contrast-surface));
}
.btn--accent { background-color: var(--color-accent); border-color: var(--color-accent); color: var(--color-accent-ink); }
.btn--accent:hover {
  background-color: color-mix(in srgb, var(--color-accent) 74%, var(--color-contrast-surface));
  border-color: color-mix(in srgb, var(--color-accent) 74%, var(--color-contrast-surface));
}
.btn--quiet { background-color: transparent; border-color: var(--color-line); color: var(--color-ink); }
.btn--quiet:hover { background-color: var(--color-highlight); border-color: var(--color-ink-muted); color: var(--color-ink); }
.btn--on-dark { background-color: transparent; border-color: var(--color-contrast-line); color: var(--color-contrast-ink); }
.btn--on-dark:hover { background-color: transparent; border-color: var(--color-contrast-accent); color: var(--color-contrast-accent); }
.text-link {
  color: var(--color-ink);
  border-bottom: var(--border-thin) solid var(--color-line);
  padding-bottom: 2px;
  transition: color 140ms ease-out, border-color 140ms ease-out;
}
.text-link:hover { color: var(--color-accent); border-color: var(--color-accent); }

/* ---------- 面包屑 ---------- */
.crumbs {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--color-ink-muted);
}
.crumbs li + li::before { content: "/"; margin-right: var(--space-2); color: var(--color-line); }
.crumbs a:hover { color: var(--color-ink); }

/* ---------- 状态与标签 ---------- */
.status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  font-variant-numeric: tabular-nums lining-nums;
  color: var(--color-ink-soft);
}
.status::before {
  content: "";
  flex: 0 0 auto;
  width: 6px;
  height: 6px;
  background-color: var(--color-accent);
  border-radius: var(--radius-pill);
}
.status--pending::before { background-color: var(--color-primary); }
.status--muted::before { background-color: var(--color-ink-muted); }
.status--on-dark { color: var(--color-contrast-ink); }
.status--on-dark::before { background-color: var(--color-contrast-accent); }
.tag {
  display: inline-block;
  padding: 3px 10px;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--color-ink-soft);
}
.tag--accent { border-color: var(--color-accent); color: var(--color-accent); }

/* ---------- 数据表 ---------- */
.data-table { width: 100%; font-size: var(--text-sm); }
.data-table th,
.data-table td {
  padding: var(--space-2) var(--space-2) var(--space-2) 0;
  text-align: left;
  vertical-align: top;
  border-bottom: var(--border-thin) solid var(--color-line);
}
.data-table thead th {
  font-weight: var(--weight-body);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--color-ink-muted);
  border-bottom: var(--border-thin) solid var(--color-ink-muted);
}
.data-table tbody tr { transition: background-color 140ms ease-out; }
.data-table tbody tr:hover { background-color: var(--color-highlight); }
.data-table .num { font-family: var(--font-mono); font-size: var(--text-sm); }

/* ---------- 图片容器 ---------- */
.media {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-lg);
  background-color: var(--color-surface-deep);
}
.media img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.68) contrast(0.96) brightness(0.97);
}
.media--16x9 { aspect-ratio: 16 / 9; }
.media--4x3 { aspect-ratio: 4 / 3; }
.media--3x2 { aspect-ratio: 3 / 2; }
.media--1x1 { aspect-ratio: 1 / 1; }
.media--3x4 { aspect-ratio: 3 / 4; }
.media__scrim {
  position: absolute;
  inset: 0;
  background: var(--overlay-scrim);
  pointer-events: none;
}
.media__body {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: var(--space-4);
  color: var(--color-contrast-ink);
}
.media__title {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: 1.2;
  letter-spacing: var(--tracking-heading);
  color: var(--color-contrast-ink);
}
.media__meta {
  margin-top: var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--color-contrast-ink);
  opacity: 0.82;
}
.media__note { margin-top: var(--space-2); font-size: var(--text-xs); color: var(--color-ink-muted); }

/* ---------- 横向轨道 ---------- */
.scroll-track {
  display: flex;
  gap: var(--space-4);
  overflow-x: auto;
  scroll-snap-type: x proximity;
  padding-bottom: var(--space-3);
  scrollbar-color: var(--color-line) transparent;
}
.scroll-track > * { flex: 0 0 auto; scroll-snap-align: start; }
.scroll-track[data-dragging] { cursor: grabbing; user-select: none; }

/* ---------- 跳转链接 ---------- */
.skip-link {
  position: fixed;
  top: -100px;
  left: var(--space-2);
  z-index: 140;
  padding: 10px var(--space-3);
  background-color: var(--color-primary);
  color: var(--color-primary-ink);
  font-size: var(--text-sm);
  letter-spacing: 0.08em;
  border-radius: var(--radius-sm);
  transition: top 140ms ease-out;
}
.skip-link:focus { top: var(--space-2); }

/* ---------- 头部（移动优先：顶栏 + 抽屉） ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 90;
  background-color: var(--color-surface);
  border-bottom: var(--border-thin) solid var(--color-line);
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding: var(--space-2) var(--space-3);
}
.brand { display: block; flex: 0 0 auto; color: var(--color-ink); }
.brand__mark {
  display: block;
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: 1.1;
  letter-spacing: 0.16em;
}
.brand__sub {
  display: block;
  margin-top: 4px;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  color: var(--color-ink-muted);
}
.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  flex: 0 0 auto;
  padding: var(--space-1) 0;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.2em;
  color: var(--color-ink-soft);
  transition: color 140ms ease-out;
}
.nav-toggle:hover { color: var(--color-ink); }
.nav-toggle__bars { display: grid; gap: 5px; width: 22px; }
.nav-toggle__bars > span {
  display: block;
  height: 1px;
  background-color: currentColor;
  transition: transform 160ms ease-out;
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars > span:first-child { transform: translateY(3px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars > span:last-child { transform: translateY(-3px) rotate(-45deg); }

/* ---------- 抽屉导航 ---------- */
.site-nav {
  position: fixed;
  inset: 0 auto 0 0;
  z-index: 110;
  width: min(320px, 86vw);
  padding: var(--space-8) var(--space-4) var(--space-6);
  background-color: var(--color-surface);
  border-right: var(--border-thin) solid var(--color-line);
  overflow-y: auto;
  transform: translateX(-101%);
  transition: transform 200ms ease-out;
}
.site-nav[data-open] { transform: translateX(0); }
.site-nav::before {
  content: "";
  display: block;
  width: 34px;
  height: 2px;
  margin-bottom: var(--space-4);
  background-color: var(--color-accent);
}
.site-nav__head {
  margin-bottom: var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.24em;
  color: var(--color-ink-muted);
}
.site-nav__list { display: flex; flex-direction: column; }
.site-nav__list a {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
  padding: 11px 0 11px var(--space-3);
  color: var(--color-ink-soft);
  letter-spacing: 0.05em;
  transition: color 140ms ease-out, background-color 140ms ease-out;
}
.site-nav__list a::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background-color: transparent;
  transition: width 140ms ease-out, background-color 140ms ease-out;
}
.site-nav__list a:hover { color: var(--color-ink); background-color: var(--color-highlight); }
.site-nav__list a:hover::before { width: 4px; background-color: var(--color-primary); }
.site-nav__list a[aria-current="page"] { color: var(--color-ink); }
.site-nav__list a[aria-current="page"]::before { width: 4px; background-color: var(--color-accent); }
.site-nav__num {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  font-variant-numeric: tabular-nums lining-nums;
  color: var(--color-ink-muted);
}
.site-nav__text { font-size: var(--text-base); }
.site-nav__note {
  margin-top: var(--space-6);
  padding-top: var(--space-3);
  border-top: var(--border-thin) solid var(--color-line);
  font-size: var(--text-sm);
}
.site-nav__link {
  color: var(--color-ink-soft);
  border-bottom: var(--border-thin) solid var(--color-line);
  padding-bottom: 2px;
  transition: color 140ms ease-out, border-color 140ms ease-out;
}
.site-nav__link:hover { color: var(--color-accent); border-color: var(--color-accent); }
.nav-scrim {
  position: fixed;
  inset: 0;
  z-index: 100;
  background-color: color-mix(in srgb, var(--color-contrast-surface) 58%, transparent);
  opacity: 0;
  pointer-events: none;
  transition: opacity 200ms ease-out;
}
.nav-scrim[data-open] { opacity: 1; pointer-events: auto; }
@media (max-width: 1079px) {
  body.is-nav-open { overflow: hidden; }
}

/* ---------- 桌面：左侧固定轨道导航 ---------- */
@media (min-width: 1080px) {
  html { scroll-padding-top: 24px; }
  body { padding-left: 240px; }
  .site-header {
    position: fixed;
    inset: 0 auto 0 0;
    display: flex;
    width: 240px;
    border-bottom: 0;
    border-right: var(--border-thin) solid var(--color-line);
  }
  .site-header__inner {
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 0;
    max-width: none;
    margin: 0;
    padding: var(--space-8) var(--space-3) var(--space-4);
    overflow-y: auto;
  }
  .brand { padding-bottom: var(--space-4); border-bottom: var(--border-thin) solid var(--color-line); }
  .nav-toggle { display: none; }
  .nav-scrim { display: none; }
  .site-nav {
    position: static;
    inset: auto;
    width: auto;
    transform: none;
    padding: var(--space-6) 0 0;
    border-right: 0;
    background-color: transparent;
    overflow: visible;
    transition: none;
  }
}

/* ---------- 页脚：反色区块 ---------- */
.site-footer {
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  font-size: var(--text-sm);
  line-height: 1.7;
  padding-block: var(--space-8) var(--space-6);
}
.site-footer__inner {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--space-3);
}
.site-footer__top { display: grid; gap: var(--space-6); padding-top: var(--space-6); }
.site-footer__brand { display: grid; gap: var(--space-2); max-width: 38ch; }
.site-footer__mark {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: var(--weight-heading);
  line-height: 1.15;
  letter-spacing: 0.16em;
  color: var(--color-contrast-ink);
}
.site-footer__sub {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  color: var(--color-contrast-accent);
}
.site-footer__desc { font-size: var(--text-sm); color: var(--color-contrast-ink); opacity: 0.72; }
.footer-col { min-width: 0; }
.footer-col__title {
  margin-bottom: var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: var(--weight-body);
  letter-spacing: 0.22em;
  color: var(--color-contrast-ink);
  opacity: 0.6;
}
.footer-col__list li + li { margin-top: 6px; }
.footer-col__list a {
  color: var(--color-contrast-ink);
  opacity: 0.82;
  border-bottom: var(--border-thin) solid transparent;
  padding-bottom: 1px;
  transition: opacity 140ms ease-out, color 140ms ease-out, border-color 140ms ease-out;
}
.footer-col__list a:hover {
  opacity: 1;
  color: var(--color-contrast-accent);
  border-color: var(--color-contrast-accent);
}
.footer-entry {
  display: grid;
  gap: var(--space-2);
  align-items: center;
  margin-top: var(--space-8);
  padding: var(--space-4) var(--space-3) var(--space-4) var(--space-4);
  border-left: 4px solid var(--color-contrast-accent);
  background-color: color-mix(in srgb, var(--color-contrast-ink) 7%, transparent);
}
.footer-entry__label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.22em;
  color: var(--color-contrast-accent);
}
.footer-entry__text { max-width: 52ch; color: var(--color-contrast-ink); }
.site-footer__legal {
  display: grid;
  gap: var(--space-1);
  margin-top: var(--space-6);
  padding-top: var(--space-4);
  border-top: var(--border-thin) solid var(--color-contrast-line);
  font-size: var(--text-xs);
  color: var(--color-contrast-ink);
  opacity: 0.72;
}
.site-footer__copy { font-family: var(--font-mono); letter-spacing: 0.1em; }
@media (min-width: 720px) {
  .site-footer__top { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-entry { grid-template-columns: minmax(0, 1fr) auto; }
  .footer-entry__label { grid-column: 1 / -1; }
}
@media (min-width: 1080px) {
  .site-footer__top { grid-template-columns: 1.6fr 1fr 1fr 1fr; }
  .footer-col { padding-left: var(--space-3); border-left: var(--border-thin) solid var(--color-contrast-line); }
}

/* ---------- 滚动进度与显现 ---------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  z-index: 130;
  pointer-events: none;
}
.scroll-progress > span {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background-color: var(--color-accent);
  transition: transform 90ms linear;
}
@media (min-width: 1080px) { .scroll-progress { left: 240px; } }

html.has-js [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 320ms ease-out, transform 320ms ease-out;
}
html.has-js [data-reveal].is-visible { opacity: 1; transform: none; }

/* ---------- 焦点与无障碍 ---------- */
:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  html.has-js [data-reveal] { opacity: 1; transform: none; }
  .scroll-track { scroll-snap-type: none; }
}