/* =========================================================
   B体育登录 — /assets/site.css
   reset · 变量 · 中文排版 · 共享页头页脚 · 基础组件
   ========================================================= */

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 148px;
  background: #05070A;
}

body,
h1, h2, h3, h4, h5, h6,
p, figure, blockquote, dl, dd, ul, ol, hr, address {
  margin: 0;
}

ul, ol { padding: 0; }

img, svg, video, picture, canvas {
  display: block;
  max-width: 100%;
  height: auto;
}

a { color: inherit; text-decoration: none; }

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

address { font-style: normal; }

hr { border: 0; height: 1px; background: #242E3A; }

/* ---------- 2. 变量 ---------- */
:root {
  --ink: #05070A;
  --panel: #0C1118;
  --raise: #161D27;
  --line: #242E3A;
  --green: #00E07A;
  --green-deep: #0B8F52;
  --orange: #FF7A1A;
  --blue: #4DA3FF;
  --hi: #EAF0F6;
  --body: #9BA8B6;
  --mute: #5F6B78;
  --paper: #F2F5F7;

  --font-mast: "Songti SC", "Source Han Serif SC", "Noto Serif SC", Georgia, "Times New Roman", serif;
  --font-cond: "Oswald", "Arial Narrow", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-mono: ui-monospace, "JetBrains Mono", "IBM Plex Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;

  --wrap: 1240px;
  --gap: 24px;
  --gap-s: 16px;
  --radius: 3px;
  --edge: 32px;
}

@media (min-width: 768px) {
  :root { --edge: 48px; }
}

/* ---------- 3. 基础排版 ---------- */
body {
  min-height: 100vh;
  background: var(--ink);
  color: var(--body);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(36, 46, 58, 0.42) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(36, 46, 58, 0.42) 1px, transparent 1px);
  background-size: 96px 96px;
  opacity: 0.5;
  -webkit-mask-image: radial-gradient(120% 80% at 50% 0%, #000 0%, transparent 72%);
  mask-image: radial-gradient(120% 80% at 50% 0%, #000 0%, transparent 72%);
}

body > * { position: relative; z-index: 1; }

h1, h2, h3, h4 {
  color: var(--hi);
  font-family: var(--font-cond);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: 0.01em;
}

h1 { font-size: clamp(30px, 5.4vw, 44px); }
h2 { font-size: clamp(24px, 3.6vw, 32px); }
h3 { font-size: clamp(18px, 2.4vw, 22px); }

p { text-wrap: pretty; }

::selection {
  background: rgba(0, 224, 122, 0.28);
  color: var(--hi);
}

:focus-visible {
  outline: 2px solid var(--green);
  outline-offset: 2px;
  border-radius: 2px;
}

/* ---------- 4. 通用工具 ---------- */
.wrap {
  width: min(calc(100% - var(--edge)), var(--wrap));
  margin-inline: auto;
}

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

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

.data-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  color: var(--hi);
  letter-spacing: -0.01em;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--green);
}

.section { padding-block: 56px; }

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 20px;
  padding-bottom: 14px;
  margin-bottom: 26px;
  border-bottom: 1px solid var(--line);
}

.section-title {
  font-family: var(--font-cond);
  font-size: clamp(22px, 3.2vw, 30px);
  text-transform: uppercase;
  color: var(--hi);
  letter-spacing: 0.03em;
}

.section-note {
  font-size: 13px;
  line-height: 1.6;
  color: var(--body);
  flex: 1 1 220px;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border: 1px solid var(--line);
  border-radius: 2px;
  color: var(--body);
  white-space: nowrap;
}

.badge--green { color: var(--green); border-color: rgba(0, 224, 122, 0.42); background: rgba(0, 224, 122, 0.07); }
.badge--orange { color: var(--orange); border-color: rgba(255, 122, 26, 0.42); background: rgba(255, 122, 26, 0.07); }
.badge--blue { color: var(--blue); border-color: rgba(77, 163, 255, 0.42); background: rgba(77, 163, 255, 0.07); }

/* ---------- 5. 栅格与 Bento ---------- */
.grid {
  display: grid;
  gap: var(--gap);
}

.grid--12 { grid-template-columns: repeat(12, minmax(0, 1fr)); }

.bento {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--gap);
}

.bento > * { min-width: 0; }

.span-3 { grid-column: span 12; }
.span-4 { grid-column: span 12; }
.span-5 { grid-column: span 12; }
.span-6 { grid-column: span 12; }
.span-7 { grid-column: span 12; }
.span-8 { grid-column: span 12; }
.span-12 { grid-column: span 12; }

@media (min-width: 720px) {
  .span-3 { grid-column: span 6; }
  .span-4 { grid-column: span 6; }
  .span-5 { grid-column: span 6; }
  .span-6 { grid-column: span 6; }
  .span-7 { grid-column: span 12; }
  .span-8 { grid-column: span 12; }
}

@media (min-width: 1024px) {
  .span-3 { grid-column: span 3; }
  .span-4 { grid-column: span 4; }
  .span-5 { grid-column: span 5; }
  .span-6 { grid-column: span 6; }
  .span-7 { grid-column: span 7; }
  .span-8 { grid-column: span 8; }
}

/* ---------- 6. 卡片 ---------- */
.card {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 22px;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.55);
  transition: border-color 160ms ease, transform 160ms ease, background-color 160ms ease;
}

.card--focus {
  background: linear-gradient(180deg, var(--raise) 0%, var(--panel) 100%);
  padding: 24px 26px;
}

a.card,
.card--link { display: block; color: inherit; }

a.card:hover,
.card--link:hover {
  border-color: rgba(0, 224, 122, 0.62);
  transform: translateY(-2px);
}

.card__title {
  font-family: var(--font-cond);
  font-size: 19px;
  color: var(--hi);
  line-height: 1.25;
  margin-bottom: 6px;
}

.card__note {
  font-size: 13px;
  color: var(--body);
  margin-top: 8px;
}

/* ---------- 7. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 20px;
  font-family: var(--font-cond);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--hi);
  background: var(--raise);
  border: 1px solid var(--line);
  border-radius: 2px;
  white-space: nowrap;
  transition: background-color 160ms ease, border-color 160ms ease, color 160ms ease, transform 160ms ease;
}

.btn:hover { transform: translateY(-1px); border-color: rgba(0, 224, 122, 0.55); }

.btn--primary {
  background: var(--green);
  border-color: var(--green);
  color: #04120B;
}

.btn--primary:hover { background: #3BFFA0; border-color: #3BFFA0; }
.btn--primary:active { background: var(--green-deep); border-color: var(--green-deep); color: var(--hi); }

.btn--ghost {
  background: transparent;
  color: var(--green);
  border-color: rgba(0, 224, 122, 0.42);
}

.btn--ghost:hover { background: rgba(0, 224, 122, 0.08); }

/* ---------- 8. 面包屑 ---------- */
.breadcrumb {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mute);
  padding-block: 18px 0;
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
}

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

.breadcrumb li + li::before {
  content: "/";
  color: var(--line);
}

.breadcrumb a:hover { color: var(--green); }

/* ---------- 9. 正文容器 ---------- */
.prose {
  max-width: 68ch;
  font-size: 16px;
  line-height: 1.7;
  color: var(--body);
}

.prose > * + * { margin-top: 1.2em; }

.prose h2,
.prose h3 {
  margin-top: 2em;
  margin-bottom: 0.6em;
  color: var(--hi);
}

.prose h3 { font-size: 19px; }

.prose a {
  color: var(--blue);
  border-bottom: 1px solid rgba(77, 163, 255, 0.35);
}

.prose a:hover { color: var(--green); border-bottom-color: rgba(0, 224, 122, 0.5); }

.prose ul,
.prose ol { padding-left: 1.3em; }

.prose li + li { margin-top: 0.4em; }

.prose strong { color: var(--hi); }

.prose code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  color: var(--green);
}

@media (max-width: 767px) {
  .prose { font-size: 15px; line-height: 1.75; }
}

/* ---------- 10. 图片容器 ---------- */
.media {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: var(--raise);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.media > img,
.media > picture > img,
.media > video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 300ms ease, opacity 200ms ease;
}

.media--wide { aspect-ratio: 21 / 9; }
.media--square { aspect-ratio: 1 / 1; }
.media--portrait { aspect-ratio: 3 / 4; }
.media--tall { aspect-ratio: 4 / 5; }

.media__glow {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(65% 55% at 78% 18%, rgba(0, 224, 122, 0.16) 0%, transparent 70%),
    linear-gradient(180deg, rgba(5, 7, 10, 0) 40%, rgba(5, 7, 10, 0.78) 100%);
}

.media__tag {
  position: absolute;
  left: 12px;
  bottom: 12px;
  z-index: 2;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--hi);
  background: rgba(5, 7, 10, 0.72);
  border: 1px solid var(--line);
  border-radius: 2px;
  padding: 3px 8px;
}

a:hover > .media > img,
.media--link:hover > img { transform: scale(1.03); }

/* ---------- 11. 横向主题带 ---------- */
.band {
  display: flex;
  gap: 14px;
  overflow-x: auto;
  padding: 14px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior-x: contain;
}

.band::-webkit-scrollbar { display: none; }

.band > * { flex: 0 0 auto; }

/* ---------- 12. 标签页 ---------- */
.tabs {
  display: flex;
  gap: 4px;
  overflow-x: auto;
  scrollbar-width: none;
  border-bottom: 1px solid var(--line);
}

.tabs::-webkit-scrollbar { display: none; }

.tab {
  flex: 0 0 auto;
  padding: 9px 16px;
  font-family: var(--font-cond);
  font-size: 14px;
  letter-spacing: 0.06em;
  color: var(--body);
  border: 1px solid transparent;
  border-bottom: 0;
  border-radius: 2px 2px 0 0;
  transition: color 160ms ease, background-color 160ms ease, border-color 160ms ease;
}

.tab:hover { color: var(--hi); }

.tab[aria-selected="true"] {
  color: var(--green);
  background: var(--panel);
  border-color: var(--line);
}

/* ---------- 13. 可展开组 ---------- */
.accordion { border-top: 1px solid var(--line); }

.accordion__trigger {
  display: flex;
  width: 100%;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 4px;
  text-align: left;
  font-family: var(--font-cond);
  font-size: 17px;
  color: var(--hi);
  border-bottom: 1px solid var(--line);
  transition: color 160ms ease;
}

.accordion__trigger:hover { color: var(--green); }

.accordion__mark {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  color: var(--green);
  transition: transform 200ms ease;
}

.accordion__trigger[aria-expanded="true"] .accordion__mark { transform: rotate(90deg); }

.accordion__panel {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 200ms ease;
}

.accordion__panel[data-open] { grid-template-rows: 1fr; }

.accordion__inner {
  overflow: hidden;
  min-height: 0;
}

.accordion__inner > *:first-child { padding-top: 14px; }
.accordion__inner > *:last-child { padding-bottom: 18px; }

/* ---------- 14. 左侧索引 ---------- */
.toc {
  position: sticky;
  top: 128px;
  display: none;
  border-left: 1px solid var(--line);
  padding-left: 14px;
}

@media (min-width: 1024px) { .toc { display: block; } }

.toc__link {
  display: block;
  padding: 7px 0;
  font-size: 13px;
  color: var(--mute);
  border-left: 2px solid transparent;
  margin-left: -16px;
  padding-left: 14px;
  transition: color 160ms ease, border-color 160ms ease;
}

.toc__link:hover { color: var(--hi); }

.toc__link[aria-current="true"] {
  color: var(--green);
  border-left-color: var(--green);
}

/* ---------- 15. 入场 ---------- */
html.js [data-reveal] {
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 120ms ease-out, transform 120ms ease-out;
  transition-delay: var(--reveal-delay, 0ms);
}

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

/* ---------- 16. 跳转链接 ---------- */
.skip-link {
  position: absolute;
  left: 50%;
  top: 0;
  transform: translate(-50%, -140%);
  z-index: 90;
  padding: 10px 18px;
  background: var(--green);
  color: #04120B;
  font-family: var(--font-cond);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.06em;
  border-radius: 0 0 3px 3px;
  transition: transform 140ms ease;
}

.skip-link:focus { transform: translate(-50%, 0); }

/* ---------- 17. 页头 ---------- */
.site-head {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(5, 7, 10, 0.88);
  -webkit-backdrop-filter: blur(12px) saturate(140%);
  backdrop-filter: blur(12px) saturate(140%);
}

.head-frame {
  width: min(calc(100% - var(--edge)), var(--wrap));
  margin-inline: auto;
}

.masthead {
  position: relative;
  text-align: center;
  padding: 16px 0 12px;
}

.masthead__kicker {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--mute);
  margin-bottom: 6px;
}

.masthead__brand {
  display: inline-block;
  font-family: var(--font-mast);
  font-weight: 700;
  font-size: clamp(26px, 4vw, 40px);
  line-height: 1.08;
  letter-spacing: 0.08em;
  color: var(--hi);
  transition: color 160ms ease;
}

.masthead__brand:hover { color: var(--green); }

.masthead__tagline {
  margin-top: 6px;
  font-size: 12.5px;
  letter-spacing: 0.14em;
  color: var(--body);
}

.head-rule {
  position: relative;
  height: 1px;
  background: var(--line);
  overflow: hidden;
}

.head-rule::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, var(--green-deep), var(--green));
  transform: scaleX(var(--scroll-progress, 0));
  transform-origin: 0 50%;
  transition: transform 90ms linear;
}

.head-bar {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 14px;
  min-height: 54px;
  padding-bottom: 10px;
}

/* 栏目导航 */
.site-nav { display: flex; justify-content: center; min-width: 0; }

.site-nav__list {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
  margin: 0;
  padding: 0;
  overflow-x: auto;
  scrollbar-width: none;
}

.site-nav__list::-webkit-scrollbar { display: none; }

.site-nav__item { flex: 0 0 auto; }

.site-nav__link {
  display: block;
  padding: 8px 14px;
  font-family: var(--font-cond);
  font-size: 14.5px;
  letter-spacing: 0.06em;
  color: var(--body);
  border: 1px solid transparent;
  border-radius: 2px;
  white-space: nowrap;
  transition: color 160ms ease, border-color 160ms ease, background-color 160ms ease;
}

.site-nav__link:hover { color: var(--hi); border-color: var(--line); background: rgba(22, 29, 39, 0.7); }

.site-nav__link[aria-current="page"] {
  color: var(--green);
  border-color: rgba(0, 224, 122, 0.45);
  background: rgba(0, 224, 122, 0.07);
}

/* 移动开关 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 9px 13px;
  border: 1px solid var(--line);
  border-radius: 2px;
  background: var(--panel);
  font-family: var(--font-cond);
  font-size: 13.5px;
  letter-spacing: 0.08em;
  color: var(--hi);
}

.nav-toggle__bars {
  position: relative;
  display: block;
  width: 16px;
  height: 1px;
  background: currentColor;
}

.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px;
  height: 1px;
  background: currentColor;
  transition: transform 160ms ease, top 160ms ease;
}

.nav-toggle__bars::before { top: -5px; }
.nav-toggle__bars::after { top: 5px; }

.nav-toggle[aria-expanded="true"] .nav-toggle__bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before { top: 0; transform: rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after { top: 0; transform: rotate(-45deg); }

/* 页头行动入口 */
.head-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  background: var(--green);
  color: #04120B;
  font-family: var(--font-cond);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.07em;
  border-radius: 2px;
  white-space: nowrap;
  transition: background-color 160ms ease, transform 160ms ease, box-shadow 160ms ease;
}

.head-cta:hover { background: #3BFFA0; transform: translateY(-1px); }

.head-cta__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #04120B;
}

/* 滚动后的悬浮圆形入口 */
.site-head.is-condensed .head-cta {
  position: fixed;
  right: 22px;
  bottom: 22px;
  width: 56px;
  height: 56px;
  padding: 0;
  justify-content: center;
  border-radius: 50%;
  box-shadow: 0 0 0 1px rgba(0, 224, 122, 0.45), 0 10px 30px rgba(0, 224, 122, 0.22);
}

.site-head.is-condensed .head-cta__label {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.site-head.is-condensed .head-cta__dot {
  width: 12px;
  height: 12px;
  background: #04120B;
  box-shadow: 0 0 0 0 rgba(4, 18, 11, 0.5);
  animation: cta-pulse 1900ms ease-out infinite;
}

@keyframes cta-pulse {
  0% { box-shadow: 0 0 0 0 rgba(4, 18, 11, 0.55); }
  70% { box-shadow: 0 0 0 14px rgba(4, 18, 11, 0); }
  100% { box-shadow: 0 0 0 0 rgba(4, 18, 11, 0); }
}

/* 移动 / 平板导航 */
@media (max-width: 899px) {
  .nav-toggle { display: inline-flex; }

  .site-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    display: none;
    max-height: 68vh;
    overflow-y: auto;
    background: var(--panel);
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    padding: 8px var(--edge) 16px;
    box-shadow: 0 18px 40px rgba(0, 0, 0, 0.6);
  }

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

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

  .site-nav__item { width: 100%; }

  .site-nav__link {
    padding: 14px 10px;
    font-size: 15.5px;
    border: 0;
    border-bottom: 1px solid var(--line);
    border-radius: 0;
  }

  .site-nav__item:last-child .site-nav__link { border-bottom: 0; }
}

@media (max-width: 480px) {
  .masthead__tagline { font-size: 11.5px; letter-spacing: 0.1em; }
  .nav-toggle__text { display: none; }
  .head-cta { padding: 10px 13px; font-size: 13px; }
}

/* ---------- 18. 页脚 ---------- */
.site-foot {
  margin-top: 84px;
  background: #030509;
  border-top: 1px solid var(--line);
}

.foot-frame {
  width: min(calc(100% - var(--edge)), var(--wrap));
  margin-inline: auto;
  padding: 52px 0 22px;
}

.foot-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

@media (min-width: 720px) {
  .foot-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 1024px) {
  .foot-grid { grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 36px; }
}

.foot-brand {
  font-family: var(--font-mast);
  font-weight: 700;
  font-size: 22px;
  letter-spacing: 0.08em;
  color: var(--hi);
  margin-bottom: 8px;
}

.foot-coord {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--green);
  margin-bottom: 12px;
}

.foot-address {
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--body);
  max-width: 34ch;
}

.foot-note {
  margin-top: 12px;
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--mute);
  max-width: 40ch;
}

.foot-title {
  font-family: var(--font-cond);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mute);
  padding-bottom: 9px;
  margin-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.foot-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.foot-list__item { min-width: 0; }

.foot-link {
  display: block;
  padding: 5px 0;
  font-size: 14px;
  color: var(--body);
  word-break: break-all;
  transition: color 160ms ease;
}

.foot-link:hover { color: var(--green); }

.foot-link--plain { color: var(--body); cursor: default; }

.foot-icp {
  margin-top: 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mute);
}

.foot-base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 20px;
  margin-top: 40px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--mute);
}

.foot-base__copy { color: var(--mute); }

.foot-base__meta { color: var(--mute); }

/* ---------- 19. 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }

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

  .card:hover,
  .btn:hover,
  .head-cta:hover,
  a.card:hover { transform: none; }

  .media > img { transition: none; }

  .head-rule::after { transition: none; }
}