/* ==========================================================================
   Home体育主站 · /assets/site.css
   共享层：reset / tokens / 中文排版 / 页头页脚 / 通用组件
   页面专属布局请在页面 CSS 中追加，不覆盖此处结构类
   ========================================================================== */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 104px;
}

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

ul, ol { list-style: none; }

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

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

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

:focus:not(:focus-visible) { outline: none; }
:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 3px;
  border-radius: 6px;
}

::selection {
  background: var(--lime);
  color: var(--ink);
}

/* ---------- 2. tokens ---------- */
:root {
  /* 色彩：近单色深绿体系 + 唯一亮色 */
  --ink: #070D0B;
  --bg: #0B1F1A;
  --panel: #122A24;
  --line: #1E3A32;
  --lime: #C6FF3D;
  --mint: #6FE3B0;
  --warm: #F5F2EA;
  --mist: #A8B4AF;

  --lime-soft: rgba(198, 255, 61, 0.12);
  --mint-soft: rgba(111, 227, 176, 0.10);
  --grid-line: rgba(30, 58, 50, 0.55);
  --panel-deep: rgba(18, 42, 36, 0.72);

  /* 形状 */
  --r-card: 20px;
  --r-tag: 10px;
  --r-pill: 999px;

  /* 间距与栅格 */
  --gap: 24px;
  --gutter: clamp(16px, 4vw, 40px);
  --maxw: 1340px;
  --measure: 40em;
  --header-h: 76px;

  /* 动效 */
  --t: 180ms;
  --t-slow: 220ms;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);

  /* 字体：宋体刊物标题 + 无衬线正文 + 等宽数据 */
  --font-display: "Source Han Serif SC", "Songti SC", "Noto Serif SC", Georgia, "SimSun", serif;
  --font-sans: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "IBM Plex Mono", "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

/* ---------- 3. 基础排版 ---------- */
body {
  min-height: 100%;
  background-color: var(--bg);
  background-image:
    linear-gradient(to right, var(--grid-line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid-line) 1px, transparent 1px);
  background-size: 128px 128px;
  color: var(--warm);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(30px, 5vw, 60px); }
h2 { font-size: clamp(24px, 3.2vw, 38px); }
h3 { font-size: clamp(19px, 2.2vw, 24px); }

h4, h5 {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 19px;
  line-height: 1.4;
}

p { line-height: 1.8; }

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.04em;
}

.measure { max-width: var(--measure); }

.prose {
  max-width: var(--measure);
  font-size: 19px;
  line-height: 1.8;
  color: var(--warm);
}

.prose p + p { margin-top: 1em; }

.prose a {
  color: var(--mint);
  border-bottom: 1px solid rgba(111, 227, 176, 0.4);
  transition: color var(--t) var(--ease), border-color var(--t) var(--ease);
}

.prose a:hover {
  color: var(--lime);
  border-bottom-color: var(--lime);
}

.prose h2 { margin-top: 1.6em; margin-bottom: 0.5em; font-size: 24px; }
.prose h3 { margin-top: 1.4em; margin-bottom: 0.4em; font-size: 19px; }
.prose ul { margin-top: 0.8em; display: grid; gap: 8px; }
.prose ul li {
  position: relative;
  padding-left: 20px;
  color: var(--mist);
}
.prose ul li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 0.72em;
  width: 8px;
  height: 1px;
  background: var(--lime);
}

/* ---------- 4. 布局原语 ---------- */
.wrap {
  width: min(100% - var(--gutter) * 2, var(--maxw));
  margin-inline: auto;
}

.section { padding-block: clamp(48px, 7vw, 96px); }
.section--tight { padding-block: clamp(32px, 4vw, 56px); }

.stack {
  display: flex;
  flex-direction: column;
  gap: var(--stack, 16px);
}

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

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

.grid {
  display: grid;
  gap: var(--gap);
}

.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--12 { grid-template-columns: repeat(12, minmax(0, 1fr)); }

.col-2 { grid-column: span 2; }
.col-3 { grid-column: span 3; }
.col-4 { grid-column: span 4; }
.col-5 { grid-column: span 5; }
.col-6 { grid-column: span 6; }
.col-7 { grid-column: span 7; }
.col-8 { grid-column: span 8; }
.col-9 { grid-column: span 9; }
.col-10 { grid-column: span 10; }
.col-12 { grid-column: 1 / -1; }

@media (max-width: 1024px) {
  .grid--12 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .col-2, .col-3, .col-4 { grid-column: span 3; }
  .col-5, .col-6 { grid-column: 1 / -1; }
  .col-7, .col-8, .col-9, .col-10, .col-12 { grid-column: 1 / -1; }
}

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

@media (max-width: 640px) {
  .grid--12, .grid--3 { grid-template-columns: 1fr; }
  .grid--12 > * { grid-column: 1 / -1; }
}

/* ---------- 5. 章节标尺头 ---------- */
.rule-head {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 12px 16px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
  margin-bottom: var(--gap);
}

.rule-head__no {
  position: relative;
  padding-left: 22px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--lime);
}

.rule-head__no::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 14px;
  height: 1px;
  background: var(--lime);
}

.rule-head__title {
  font-family: var(--font-display);
  font-size: clamp(19px, 2.4vw, 24px);
  letter-spacing: 0.01em;
}

.rule-head__meta {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--mist);
  letter-spacing: 0.08em;
}

/* ---------- 6. 通用按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  font-size: 15px;
  font-weight: 600;
  line-height: 1;
  white-space: nowrap;
  transition: color var(--t) var(--ease), background-color var(--t) var(--ease),
    border-color var(--t) var(--ease), transform var(--t) var(--ease);
}

.btn:hover { transform: translateY(-1px); }

.btn--ghost {
  color: var(--warm);
  background: var(--panel-deep);
}

.btn--ghost:hover {
  color: var(--lime);
  border-color: var(--mint);
}

.btn--lime {
  color: var(--lime);
  border-color: rgba(198, 255, 61, 0.5);
  background: var(--lime-soft);
}

.btn--lime:hover {
  color: var(--ink);
  background: var(--lime);
  border-color: var(--lime);
}

/* ---------- 7. 标签与胶囊筛选 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border: 1px solid var(--line);
  border-radius: var(--r-tag);
  background: var(--panel-deep);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.tag--lime {
  color: var(--lime);
  border-color: rgba(198, 255, 61, 0.45);
}

.tag--mint {
  color: var(--mint);
  border-color: rgba(111, 227, 176, 0.45);
}

.pill-group {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.pill {
  padding: 7px 14px;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  background: transparent;
  font-size: 15px;
  color: var(--mist);
  transition: color var(--t) var(--ease), border-color var(--t) var(--ease),
    background-color var(--t) var(--ease);
}

.pill:hover {
  color: var(--warm);
  border-color: var(--mint);
}

.pill[aria-pressed="true"],
.pill.is-active {
  color: var(--lime);
  border-color: var(--lime);
  background: var(--lime-soft);
}

/* ---------- 8. 卡片体系 ---------- */
.card {
  position: relative;
  display: block;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--r-card);
  background: var(--panel);
  transition: transform var(--t) var(--ease), border-color var(--t) var(--ease),
    background-color var(--t) var(--ease);
}

.card:hover,
.card:focus-within {
  transform: translateY(-2px);
  border-color: rgba(198, 255, 61, 0.4);
  background: #143029;
}

.card__kicker {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--mint);
}

.card__title {
  margin-top: 8px;
  font-family: var(--font-display);
  font-size: 19px;
  line-height: 1.35;
}

.card__meta {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--mist);
}

.card__extra {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--mist);
  opacity: 0;
  transform: translateY(-4px);
  transition: opacity var(--t) var(--ease), transform var(--t) var(--ease);
}

.card:hover .card__extra,
.card:focus-within .card__extra {
  opacity: 1;
  transform: none;
}

.card--wide { padding: 24px; }

.card--metric {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-height: 132px;
}

.card--node {
  border-left: 2px solid var(--line);
  border-radius: 0 var(--r-card) var(--r-card) 0;
}

.card--node:hover { border-left-color: var(--lime); }

.metric { display: grid; gap: 4px; }

.metric__value {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--lime);
}

.metric__label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--mist);
  text-transform: uppercase;
}

/* ---------- 9. 面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--mist);
}

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

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

.breadcrumb__link {
  transition: color var(--t) var(--ease);
}

.breadcrumb__link:hover { color: var(--mint); }

.breadcrumb__item[aria-current="page"] { color: var(--warm); }

/* ---------- 10. 吸附索引栏 ---------- */
.index-rail {
  position: sticky;
  top: 96px;
  align-self: start;
  display: grid;
  gap: 2px;
  padding-block: 4px;
}

.index-rail__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 8px 10px;
  border-left: 1px solid var(--line);
  font-size: 15px;
  color: var(--mist);
  transition: color var(--t) var(--ease), border-color var(--t) var(--ease),
    background-color var(--t) var(--ease);
}

.index-rail__link:hover {
  color: var(--warm);
  border-left-color: var(--mint);
  background: var(--mint-soft);
}

.index-rail__link.is-active {
  color: var(--lime);
  border-left-color: var(--lime);
  background: var(--lime-soft);
}

.index-rail__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: inherit;
  opacity: 0.8;
}

/* ---------- 11. 图像容器 ---------- */
.img-frame {
  position: relative;
  display: block;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--r-card);
  background: var(--panel);
}

.img-frame__media {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.62) contrast(1.05);
}

.img-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(30, 58, 50, 0.5) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(30, 58, 50, 0.5) 1px, transparent 1px);
  background-size: 64px 64px;
  opacity: 0.5;
}

.img-frame--21x9 { aspect-ratio: 21 / 9; }
.img-frame--16x9 { aspect-ratio: 16 / 9; }
.img-frame--4x3 { aspect-ratio: 4 / 3; }
.img-frame--1x1 { aspect-ratio: 1 / 1; }

.img-frame__cap {
  position: absolute;
  left: 12px;
  bottom: 12px;
  z-index: 2;
  max-width: calc(100% - 24px);
  padding: 4px 10px;
  border: 1px solid var(--line);
  border-radius: var(--r-tag);
  background: rgba(7, 13, 11, 0.78);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--mist);
}

/* ---------- 12. 时间线 ---------- */
.timeline {
  position: relative;
  padding-left: 28px;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: var(--line);
}

.timeline__item {
  position: relative;
  padding-bottom: 24px;
}

.timeline__item:last-child { padding-bottom: 0; }

.timeline__dot {
  position: absolute;
  left: -28px;
  top: 6px;
  width: 15px;
  height: 15px;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--bg);
  transition: border-color var(--t) var(--ease), background-color var(--t) var(--ease),
    box-shadow var(--t) var(--ease);
}

.timeline__item.is-lit .timeline__dot {
  border-color: var(--lime);
  background: rgba(198, 255, 61, 0.24);
  box-shadow: 0 0 0 4px rgba(198, 255, 61, 0.08);
}

.timeline__time {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--mist);
}

.timeline__item.is-lit .timeline__time { color: var(--lime); }

.timeline__body {
  margin-top: 6px;
  font-size: 15px;
  color: var(--warm);
}

/* ---------- 13. 折叠长文 ---------- */
.collapse {
  border: 1px solid var(--line);
  border-radius: var(--r-card);
  background: var(--panel);
  padding: 18px 20px;
}

.collapse__body {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows var(--t-slow) var(--ease);
}

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

.collapse__inner { overflow: hidden; }

.collapse__toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 14px;
  padding: 8px 16px;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
  transition: color var(--t) var(--ease), border-color var(--t) var(--ease);
}

.collapse__toggle:hover {
  color: var(--lime);
  border-color: var(--lime);
}

/* ---------- 14. 显现协议 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity var(--t-slow) var(--ease), transform var(--t-slow) var(--ease);
}

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

/* ---------- 15. 跳至主内容 ---------- */
.skip-link {
  position: absolute;
  left: 12px;
  top: -80px;
  z-index: 200;
  padding: 10px 18px;
  border-radius: var(--r-pill);
  background: var(--lime);
  color: var(--ink);
  font-size: 15px;
  font-weight: 700;
  transition: top var(--t) var(--ease);
}

.skip-link:focus { top: 12px; }

/* ---------- 16. 页头 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(11, 31, 26, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(8px);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--gap);
  min-height: var(--header-h);
  padding-block: 12px;
  transition: min-height var(--t) var(--ease), padding var(--t) var(--ease);
}

.site-header[data-condensed] .site-header__inner {
  min-height: 60px;
  padding-block: 8px;
}

.site-header__lead {
  display: flex;
  align-items: center;
  gap: 16px;
  min-width: 0;
}

.site-header__trail {
  display: flex;
  align-items: center;
  gap: 18px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand__mark {
  display: grid;
  place-items: center;
  flex: none;
  width: 40px;
  height: 40px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel);
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: 0.06em;
  color: var(--lime);
}

.brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.25;
  min-width: 0;
}

.brand__name {
  font-family: var(--font-display);
  font-size: 19px;
  letter-spacing: 0.01em;
  color: var(--warm);
}

.brand__tag {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--mist);
  white-space: nowrap;
}

.season-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
  white-space: nowrap;
}

.season-chip__val { color: var(--lime); }

.nav {
  padding: 2px 4px;
  border: 1px solid transparent;
  border-radius: var(--r-pill);
  transition: background-color var(--t) var(--ease), border-color var(--t) var(--ease),
    padding var(--t) var(--ease);
}

.site-header[data-condensed] .nav {
  background: var(--panel);
  border-color: var(--line);
  padding: 2px 6px;
}

.nav__list {
  display: flex;
  align-items: center;
  gap: 2px;
}

.nav__link {
  position: relative;
  display: inline-block;
  padding: 8px 12px;
  border-radius: var(--r-pill);
  font-size: 15px;
  color: var(--mist);
  transition: color var(--t) var(--ease), background-color var(--t) var(--ease);
}

.nav__link:hover {
  color: var(--warm);
  background: var(--mint-soft);
}

.nav__link[aria-current="page"] { color: var(--lime); }

.nav__link[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 1px;
  height: 2px;
  border-radius: 2px;
  background: var(--lime);
}

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

.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  background: var(--panel-deep);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--warm);
}

.nav-toggle__bars {
  display: grid;
  gap: 4px;
  width: 16px;
}

.nav-toggle__bars i {
  display: block;
  height: 1.5px;
  background: var(--lime);
  transition: transform var(--t) var(--ease), opacity var(--t) var(--ease);
}

.site-header[data-open] .nav-toggle__bars i:nth-child(1) {
  transform: translateY(5.5px) rotate(45deg);
}

.site-header[data-open] .nav-toggle__bars i:nth-child(2) { opacity: 0; }

.site-header[data-open] .nav-toggle__bars i:nth-child(3) {
  transform: translateY(-5.5px) rotate(-45deg);
}

@media (max-width: 1140px) {
  .nav__link { padding: 8px 9px; }
  .header-actions .btn { padding: 8px 14px; }
}

@media (max-width: 980px) {
  .brand__tag { display: none; }
  .site-header__trail { gap: 12px; }
}

@media (max-width: 900px) {
  :root { --header-h: 68px; }

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

  .site-header__trail {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 16px;
    padding: 18px var(--gutter) 26px;
    max-height: calc(100vh - var(--header-h));
    overflow-y: auto;
    background: var(--bg);
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 24px 44px rgba(0, 0, 0, 0.45);
  }

  .site-header[data-open] .site-header__trail { display: flex; }

  .nav,
  .site-header[data-condensed] .nav {
    padding: 0;
    border-color: transparent;
    border-radius: 0;
    background: transparent;
  }

  .nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
  }

  .nav__link {
    padding: 12px 14px;
    border-radius: var(--r-tag);
    font-family: var(--font-display);
    font-size: 19px;
    color: var(--warm);
  }

  .nav__link[aria-current="page"] {
    background: var(--lime-soft);
    color: var(--lime);
  }

  .nav__link[aria-current="page"]::after { display: none; }

  .header-actions {
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
  }

  .header-actions .btn {
    justify-content: center;
    padding: 12px 18px;
  }

  .season-chip { display: none; }

  .index-rail {
    position: static;
    grid-auto-flow: column;
    grid-auto-columns: max-content;
    overflow-x: auto;
    padding-bottom: 8px;
  }

  .index-rail__link { border-left: 0; border-bottom: 1px solid var(--line); }
  .index-rail__link.is-active { border-bottom-color: var(--lime); }
}

/* ---------- 17. 页脚 ---------- */
.site-footer {
  margin-top: clamp(56px, 8vw, 96px);
  background: var(--ink);
  border-top: 1px solid var(--line);
  background-image: linear-gradient(to bottom, rgba(11, 31, 26, 0.85), transparent 40%);
}

.site-footer__inner {
  display: grid;
  grid-template-columns: 1.1fr 1.7fr 1.2fr;
  gap: clamp(24px, 4vw, 56px);
  padding-block: clamp(40px, 6vw, 72px);
}

.site-footer__brand {
  display: grid;
  gap: 16px;
  align-content: start;
}

.site-footer__note {
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
  max-width: 34em;
}

.footer-cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}

.footer-col { display: grid; align-content: start; gap: 12px; }

.footer-col__title {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--lime);
}

.footer-col__list { display: grid; gap: 10px; }

.footer-col__link {
  font-size: 15px;
  color: var(--mist);
  transition: color var(--t) var(--ease), padding-left var(--t) var(--ease);
}

.footer-col__link:hover {
  color: var(--mint);
  padding-left: 4px;
}

.site-footer__meta { display: grid; align-content: start; gap: 12px; }

.meta-list {
  display: grid;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
}

.meta-list__row {
  display: flex;
  gap: 12px;
  justify-content: space-between;
  align-items: baseline;
  padding-bottom: 8px;
  border-bottom: 1px dashed var(--line);
}

.meta-list__key {
  color: var(--mist);
  letter-spacing: 0.1em;
  flex: none;
}

.meta-list__val {
  color: var(--warm);
  text-align: right;
  word-break: break-all;
}

.site-footer__legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 24px;
  padding-block: 20px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

@media (max-width: 1024px) {
  .site-footer__inner { grid-template-columns: 1fr 1fr; }
  .site-footer__brand { grid-column: 1 / -1; }
}

@media (max-width: 640px) {
  .site-footer__inner { grid-template-columns: 1fr; }
  .footer-cols { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .meta-list__row { flex-direction: column; gap: 4px; }
  .meta-list__val { text-align: left; }
}

/* ---------- 18. 无障碍与减动效 ---------- */
@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;
  }

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

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