/* ============================================================
   九博体育 · 共享样式  /assets/site.css
   深夜监控室气质：深靛蓝基底 · 电光青数据 · 琥珀金节点
   ============================================================ */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 9rem;
}

body, h1, h2, h3, h4, h5, p, ul, ol, li, figure, blockquote, dl, dd, address { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, svg, video { display: block; max-width: 100%; height: auto; }
a { color: inherit; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
table { border-collapse: collapse; width: 100%; }

/* ---------- 2. 设计令牌 ---------- */
:root {
  --ink: #0B1230;
  --ink-deep: #05070F;
  --cyan: #2FE6D6;
  --amber: #F2B34A;
  --graphite: #3A4358;
  --paper: #E8EDF7;
  --mist: #8FA3C4;
  --panel: #16223D;
  --green: #4FD1A5;
  --warn: #FF7A59;

  --line: rgba(58, 67, 88, .85);
  --line-soft: rgba(143, 163, 196, .18);
  --line-cyan: rgba(47, 230, 214, .42);

  --font-head: 'Barlow Condensed', 'Oswald', 'Noto Sans SC', 'Source Han Sans SC', 'Microsoft YaHei', sans-serif;
  --font-body: 'Inter', 'Source Han Sans SC', 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-mono: 'JetBrains Mono', 'IBM Plex Mono', 'Roboto Mono', ui-monospace, SFMono-Regular, Menlo, monospace;

  --wrap: 1280px;
  --radius: 2px;
  --shadow: 0 1px 0 rgba(143, 163, 196, .06), 0 18px 36px -26px rgba(5, 7, 15, .95);
  --head-offset: 9rem;
}

/* ---------- 3. 文档与中文排版 ---------- */
body {
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.75;
  letter-spacing: .01em;
  color: var(--paper);
  background-color: var(--ink);
  background-image:
    radial-gradient(1100px 620px at 84% -14%, rgba(47, 230, 214, .10), transparent 62%),
    radial-gradient(900px 520px at 2% 4%, rgba(242, 179, 74, .055), transparent 60%),
    linear-gradient(180deg, rgba(5, 7, 15, 0) 0%, rgba(5, 7, 15, .5) 100%);
  background-repeat: no-repeat;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5 {
  font-family: var(--font-head);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: .04em;
  text-transform: uppercase;
}

h1 { font-size: clamp(2.6rem, 7vw, 5rem); }
h2 { font-size: clamp(1.6rem, 3.6vw, 2.6rem); }
h3 { font-size: clamp(1.15rem, 2vw, 1.5rem); }
h4 { font-size: 1.05rem; letter-spacing: .1em; }

p { text-wrap: pretty; }
strong { color: #fff; }

::selection { background: rgba(47, 230, 214, .28); color: #fff; }

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: var(--radius);
}
:focus:not(:focus-visible) { outline: none; }

.mono,
.num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: .01em;
}

.num-xl {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(2.2rem, 7vw, 4.5rem);
  line-height: 1;
  color: var(--cyan);
  letter-spacing: -.02em;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--cyan);
}

.lead {
  max-width: 66ch;
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--mist);
}

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

/* ---------- 4. 布局容器与网格 ---------- */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: clamp(1.1rem, 4vw, 2.5rem);
}

.grid { display: grid; gap: 1.25rem; }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--split { grid-template-columns: minmax(0, 2fr) minmax(0, 1fr); }

@media (max-width: 900px) {
  .grid--2,
  .grid--3,
  .grid--split { grid-template-columns: minmax(0, 1fr); }
}

/* ---------- 5. 跳转链接 ---------- */
.skip-link {
  position: absolute;
  left: 1rem;
  top: -6rem;
  z-index: 300;
  padding: .65rem 1.1rem;
  background: var(--cyan);
  color: #04121b;
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .12em;
  text-decoration: none;
  border-radius: var(--radius);
  transition: top .18s ease;
}
.skip-link:focus { top: .8rem; }

/* ---------- 6. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: .72rem 1.25rem;
  font-family: var(--font-head);
  font-size: .95rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--paper);
  background: rgba(22, 34, 61, .6);
  border: 1px solid var(--graphite);
  border-radius: var(--radius);
  white-space: nowrap;
  transition: color .2s ease, border-color .2s ease, background-color .2s ease, transform .2s ease, box-shadow .2s ease;
}
.btn:hover {
  color: var(--cyan);
  border-color: var(--cyan);
  transform: translateY(-1px);
}
.btn--accent {
  background: linear-gradient(135deg, var(--cyan), #17a3b0);
  color: #04121b;
  border-color: transparent;
  font-weight: 700;
}
.btn--accent:hover {
  color: #04121b;
  box-shadow: 0 0 0 1px rgba(47, 230, 214, .5), 0 12px 26px -16px rgba(47, 230, 214, .8);
}
.btn--ghost {
  background: transparent;
  border-color: var(--line);
  color: var(--mist);
}
.btn--ghost:hover { color: var(--paper); border-color: var(--paper); }
.btn--sm { padding: .48rem .85rem; font-size: .78rem; letter-spacing: .12em; }

/* ---------- 7. 品牌 ---------- */
.brand {
  display: inline-flex;
  align-items: center;
  gap: .65rem;
  color: var(--paper);
  text-decoration: none;
}
.brand__mark {
  flex: none;
  width: 12px;
  height: 12px;
  transform: rotate(45deg);
  background: linear-gradient(135deg, var(--cyan), var(--amber));
  box-shadow: 0 0 14px rgba(47, 230, 214, .55);
}
.brand__name {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(1.45rem, 3.2vw, 2.15rem);
  line-height: 1;
  letter-spacing: .1em;
  text-transform: uppercase;
}
.brand__tagline {
  font-family: var(--font-mono);
  font-size: .66rem;
  line-height: 1.7;
  letter-spacing: .18em;
  color: var(--mist);
  text-transform: uppercase;
}
.brand--foot .brand__name { font-size: 1.5rem; }

/* ---------- 8. 刊头 ---------- */
.masthead {
  position: sticky;
  top: 0;
  z-index: 80;
  background: rgba(5, 7, 15, .92);
  border-bottom: 1px solid var(--line-soft);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.masthead__inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 1rem;
  padding-block: .95rem .85rem;
}

.masthead__brand {
  grid-column: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .45rem;
  text-align: center;
}

.masthead__aux {
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--mist);
}
.masthead__aux--left { grid-column: 1; justify-self: start; }
.masthead__aux--right {
  grid-column: 3;
  justify-self: end;
  display: flex;
  align-items: center;
  gap: .6rem;
}

/* 移动导航按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: .6rem;
  padding: .5rem .7rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  transition: color .2s ease, border-color .2s ease;
}
.nav-toggle:hover { color: var(--cyan); border-color: var(--cyan); }
.nav-toggle__bars {
  display: inline-flex;
  flex-direction: column;
  justify-content: space-between;
  width: 18px;
  height: 12px;
}
.nav-toggle__bars span {
  display: block;
  height: 1.5px;
  background: currentColor;
  transition: transform .25s ease, opacity .2s ease;
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1) { transform: translateY(5.25px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(3) { transform: translateY(-5.25px) rotate(-45deg); }
.nav-toggle__label { line-height: 1; }

/* ---------- 9. 栏目导航 ---------- */
.nav {
  position: relative;
  background: linear-gradient(180deg, rgba(22, 34, 61, .38), rgba(5, 7, 15, 0));
  border-top: 1px solid var(--line-soft);
}
.nav__list {
  counter-reset: navidx;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: stretch;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: clamp(.8rem, 3vw, 2rem);
}
.nav__list > li {
  counter-increment: navidx;
  display: flex;
}
.nav__link {
  display: flex;
  flex-direction: column;
  gap: .15rem;
  padding: .7rem 1.1rem .75rem;
  color: var(--mist);
  font-size: .9rem;
  line-height: 1.3;
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: color .2s ease, border-color .2s ease, background-color .2s ease;
}
.nav__link::before {
  content: counter(navidx, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: .6rem;
  letter-spacing: .14em;
  color: rgba(143, 163, 196, .6);
}
.nav__link:hover {
  color: var(--paper);
  border-bottom-color: var(--line-cyan);
  background: rgba(47, 230, 214, .05);
}
.nav__link[aria-current="page"] {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}
.nav__link[aria-current="page"]::before { color: var(--amber); }

/* ---------- 10. 滚动进度 ---------- */
.progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: rgba(143, 163, 196, .12);
  pointer-events: none;
}
.progress__bar {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleX(0);
  transform-origin: left center;
  background: linear-gradient(90deg, var(--cyan), var(--amber));
}

/* ---------- 11. 页脚 ---------- */
.site-foot {
  position: relative;
  margin-top: clamp(3rem, 8vw, 6rem);
  background: var(--ink-deep);
  border-top: 1px solid var(--line);
  color: var(--mist);
}
.site-foot::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: min(420px, 55%);
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), rgba(47, 230, 214, 0));
}
.foot__grid {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, minmax(0, 1fr)) 1.4fr;
  gap: clamp(1.5rem, 3vw, 2.75rem);
  padding-block: clamp(2.2rem, 5vw, 3.5rem);
}
.foot__brand {
  display: flex;
  flex-direction: column;
  gap: .85rem;
}
.foot__tagline {
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .16em;
  color: var(--mist);
}
.foot__note {
  max-width: 34ch;
  font-size: .85rem;
  line-height: 1.7;
  color: rgba(143, 163, 196, .85);
}
.foot__col { min-width: 0; }
.foot__coltitle {
  margin-bottom: .9rem;
  padding-bottom: .55rem;
  border-bottom: 1px solid var(--line-soft);
  font-family: var(--font-head);
  font-size: .95rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--paper);
}
.foot__list {
  display: flex;
  flex-direction: column;
  gap: .55rem;
  font-size: .9rem;
}
.foot__link {
  display: inline-block;
  color: var(--mist);
  text-decoration: none;
  transition: color .2s ease, padding-left .2s ease;
}
.foot__link:hover { color: var(--cyan); padding-left: .3rem; }

.foot__list--contact { gap: .8rem; }
.foot__list--contact li {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem;
}
.foot__label {
  min-width: 2.6rem;
  font-family: var(--font-mono);
  font-size: .64rem;
  letter-spacing: .16em;
  color: rgba(143, 163, 196, .7);
}
.foot__value {
  font-size: .88rem;
  color: var(--paper);
  word-break: break-all;
}

.copy-chip {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  padding: .2rem .55rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: .66rem;
  letter-spacing: .12em;
  color: var(--mist);
  transition: color .2s ease, border-color .2s ease, background-color .2s ease;
}
.copy-chip:hover { color: var(--cyan); border-color: var(--cyan); }
.copy-chip[data-copied] {
  color: var(--green);
  border-color: rgba(79, 209, 165, .6);
  background: rgba(79, 209, 165, .08);
}

.foot__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: .75rem 1.5rem;
  padding-block: 1.1rem 1.4rem;
  border-top: 1px solid var(--line-soft);
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .1em;
}
.foot__copy,
.foot__icp { color: rgba(143, 163, 196, .78); }
.foot__legal {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem 1.25rem;
}
.foot__legal a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .2s ease, border-color .2s ease;
}
.foot__legal a:hover { color: var(--cyan); border-bottom-color: var(--cyan); }

/* ---------- 12. 章节头 ---------- */
.section { padding-block: clamp(2.4rem, 6vw, 4.5rem); }
.section__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: end;
  gap: 1.2rem;
  margin-bottom: 1.8rem;
}
.section__index {
  font-family: var(--font-mono);
  font-size: clamp(2rem, 6vw, 3.6rem);
  line-height: .85;
  letter-spacing: .02em;
  color: rgba(47, 230, 214, .18);
  -webkit-text-stroke: 1px rgba(47, 230, 214, .55);
}
.section__title {
  font-family: var(--font-head);
  font-size: clamp(1.6rem, 3.6vw, 2.6rem);
  letter-spacing: .04em;
  text-transform: uppercase;
}
.section__sub {
  grid-column: 1 / -1;
  max-width: 64ch;
  font-size: .95rem;
  color: var(--mist);
}

/* ---------- 13. 数据面板 ---------- */
.panel {
  position: relative;
  padding: clamp(1.1rem, 2.4vw, 1.6rem);
  background: linear-gradient(180deg, rgba(22, 34, 61, .88), rgba(11, 18, 48, .6));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.panel__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: .75rem 1rem;
  margin-bottom: 1rem;
  padding-bottom: .75rem;
  border-bottom: 1px solid var(--line-soft);
}
.panel__title {
  font-family: var(--font-head);
  font-size: 1.15rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--paper);
}
.panel__meta {
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .14em;
  color: var(--mist);
}
.panel__body { color: var(--paper); }
.panel__body > * + * { margin-top: .7rem; }

/* ---------- 14. 状态标记 ---------- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .25rem .55rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .12em;
  color: var(--mist);
  white-space: nowrap;
}
.badge--live {
  color: var(--green);
  border-color: rgba(79, 209, 165, .45);
  background: rgba(79, 209, 165, .08);
}
.badge--warn {
  color: var(--warn);
  border-color: rgba(255, 122, 89, .45);
  background: rgba(255, 122, 89, .08);
}
.badge--gold {
  color: var(--amber);
  border-color: rgba(242, 179, 74, .45);
  background: rgba(242, 179, 74, .08);
}

/* ---------- 15. 编号轨道 ---------- */
.rail {
  position: sticky;
  top: var(--head-offset);
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .12em;
}
.rail__list {
  display: flex;
  flex-direction: column;
  gap: .15rem;
  border-left: 1px solid var(--line-soft);
}
.rail__link {
  display: block;
  margin-left: -1px;
  padding: .5rem .8rem;
  color: var(--mist);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: color .2s ease, border-color .2s ease, background-color .2s ease;
}
.rail__link:hover {
  color: var(--paper);
  background: rgba(47, 230, 214, .06);
}
.rail__link[aria-current="true"] {
  color: var(--cyan);
  border-left-color: var(--cyan);
  background: rgba(47, 230, 214, .08);
}

/* ---------- 16. 面包屑 ---------- */
.breadcrumbs {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .14em;
  color: var(--mist);
}
.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem;
}
.breadcrumbs li + li::before {
  content: "/";
  margin-right: .5rem;
  color: var(--graphite);
}
.breadcrumbs a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}
.breadcrumbs a:hover { color: var(--cyan); border-bottom-color: var(--cyan); }
.breadcrumbs [aria-current="page"] { color: var(--paper); }

/* ---------- 17. 可展开内容组 ---------- */
.disclosure {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(22, 34, 61, .5);
}
.disclosure + .disclosure { margin-top: .6rem; }
.disclosure__btn {
  display: flex;
  width: 100%;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.1rem;
  text-align: left;
  font-family: var(--font-head);
  font-size: 1.05rem;
  letter-spacing: .06em;
  color: var(--paper);
  transition: color .2s ease, background-color .2s ease;
}
.disclosure__btn:hover { color: var(--cyan); background: rgba(47, 230, 214, .05); }
.disclosure__icon {
  position: relative;
  flex: none;
  width: 12px;
  height: 12px;
  color: currentColor;
}
.disclosure__icon::before,
.disclosure__icon::after {
  content: "";
  position: absolute;
  background: currentColor;
  transition: transform .25s ease, opacity .2s ease;
}
.disclosure__icon::before { left: 0; top: 5.25px; width: 12px; height: 1.5px; }
.disclosure__icon::after { top: 0; left: 5.25px; width: 1.5px; height: 12px; }
.disclosure__btn[aria-expanded="true"] .disclosure__icon::after { transform: scaleY(0); opacity: 0; }
.disclosure__panel {
  padding: .9rem 1.1rem 1.15rem;
  border-top: 1px solid var(--line-soft);
  font-size: .95rem;
  color: var(--mist);
}
.disclosure__panel[hidden] { display: none; }
.disclosure__panel > * + * { margin-top: .7rem; }

/* ---------- 18. 图片容器（页面阶段放占位图） ---------- */
.media-frame {
  position: relative;
  display: block;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(140deg, rgba(22, 34, 61, .95), rgba(5, 7, 15, .95));
}
.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--tall { aspect-ratio: 4 / 5; }
.media-frame__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(.9) contrast(1.05) brightness(.94);
}
.media-frame__caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: .9rem 1rem;
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .12em;
  color: var(--mist);
  background: linear-gradient(180deg, rgba(5, 7, 15, 0), rgba(5, 7, 15, .92));
}
.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(143, 163, 196, .07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(143, 163, 196, .07) 1px, transparent 1px);
  background-size: 40px 40px;
}

/* ---------- 19. 显现动效 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity .6s ease, transform .6s cubic-bezier(.2, .7, .3, 1);
}
[data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 20. 响应式：刊头与导航 ---------- */
@media (max-width: 960px) {
  .nav-toggle { display: inline-flex; }
  .masthead__aux--left { display: none; }
  .masthead__aux--right .btn { display: none; }
  .masthead__inner { padding-block: .8rem; }

  .nav {
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    background: var(--ink-deep);
    transition: max-height .4s cubic-bezier(.4, 0, .2, 1), opacity .3s ease;
  }
  .nav[data-open] {
    max-height: min(80vh, 34rem);
    overflow-y: auto;
    opacity: 1;
  }
  .nav__list {
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    padding: .3rem clamp(1.1rem, 4vw, 2.5rem) 1.4rem;
  }
  .nav__list > li { display: block; }
  .nav__link {
    flex-direction: row;
    align-items: baseline;
    gap: .8rem;
    padding: .85rem 0 .85rem .9rem;
    border-bottom: 1px solid var(--line-soft);
    border-left: 2px solid transparent;
  }
  .nav__link[aria-current="page"] {
    border-bottom-color: var(--line-soft);
    border-left-color: var(--cyan);
  }
}

@media (max-width: 620px) {
  .brand__tagline { font-size: .6rem; letter-spacing: .1em; }
  .progress { height: 2px; }
}

/* ---------- 21. 响应式：页脚 ---------- */
@media (max-width: 1080px) {
  .foot__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .foot__brand { grid-column: 1 / -1; }
}

@media (max-width: 560px) {
  .foot__grid { grid-template-columns: minmax(0, 1fr); }
  .foot__bottom { flex-direction: column; align-items: flex-start; }
}

/* ---------- 22. 减少动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  [data-reveal] { opacity: 1; transform: none; }
  .btn:hover { transform: none; }
  .foot__link:hover { padding-left: 0; }
}