/* =========================================================
   宝威体育 · 夜间计分板  |  /assets/site.css
   共享外壳样式：reset / 令牌 / 页头 / 页脚 / 通用组件
   ========================================================= */

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

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

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

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

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

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

a { color: inherit; }

table { border-collapse: collapse; }

/* ---------- 2. 设计令牌 ---------- */
:root {
  --night: #0B1F1A;
  --stand: #12302A;
  --edge: #071410;
  --lime: #C8FF3D;
  --lime-dim: #9BD62B;
  --amber: #F2B32E;
  --paper: #F4F7F2;
  --mist: #9DB3A9;
  --stroke: #24443C;
  --coral: #FF5F4A;
  --chill: #E8FFF4;

  --font-display: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, sans-serif;
  --font-mono: ui-monospace, "JetBrains Mono", "SF Mono", Menlo, Consolas, "Courier New", monospace;

  --fs-display: clamp(2rem, 1.15rem + 3.8vw, 3.5rem);
  --fs-h2: clamp(1.5rem, 1.16rem + 1.5vw, 2.125rem);
  --fs-h3: clamp(1.125rem, 1rem + 0.6vw, 1.375rem);
  --fs-body: 1rem;
  --fs-label: 0.75rem;

  --shell: 1200px;
  --pad: clamp(1rem, 0.35rem + 2.4vw, 2.5rem);
  --gap: clamp(1rem, 0.6rem + 1.6vw, 2rem);
  --rule: 2px;
  --hard: 6px 6px 0 var(--edge);
  --hard-sm: 4px 4px 0 var(--edge);
}

/* ---------- 3. 基础排版（中文优先） ---------- */
body {
  min-height: 100vh;
  background-color: var(--night);
  background-image:
    radial-gradient(1100px 560px at 12% -12%, rgba(200, 255, 61, 0.07), transparent 62%),
    radial-gradient(900px 520px at 104% 2%, rgba(242, 179, 46, 0.05), transparent 58%);
  background-repeat: no-repeat;
  color: var(--paper);
  font-family: var(--font-display);
  font-size: var(--fs-body);
  line-height: 1.75;
  letter-spacing: 0.005em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  font-stretch: condensed;
}

h1 { font-size: var(--fs-display); }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); }

p { max-width: 38em; }

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

/* ---------- 4. 无障碍工具 ---------- */
:focus-visible {
  outline: 3px solid var(--lime);
  outline-offset: 2px;
}

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

.skip-link {
  position: absolute;
  left: 1rem;
  top: -140px;
  z-index: 200;
  padding: 0.7rem 1.2rem;
  background: var(--lime);
  color: var(--night);
  font-weight: 800;
  font-size: 0.875rem;
  letter-spacing: 0.06em;
  text-decoration: none;
  border: var(--rule) solid var(--night);
  transition: top 0.16s ease;
}
.skip-link:focus,
.skip-link:focus-visible { top: 0.75rem; }

/* ---------- 5. 页头 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: var(--night);
  border-bottom: var(--rule) solid var(--stroke);
}

.masthead {
  position: relative;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 var(--pad);
}

.masthead__rail {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 0.75rem;
  padding: 0.85rem 0 0.7rem;
}

.masthead__side {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  min-width: 0;
}
.masthead__side--start { justify-content: flex-start; }
.masthead__side--end { justify-content: flex-end; }

.masthead__brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0 0.5rem;
  text-decoration: none;
  color: var(--paper);
}

.masthead__brand-mark {
  font-size: clamp(1.05rem, 0.8rem + 1.1vw, 1.6rem);
  font-weight: 800;
  letter-spacing: 0.06em;
  line-height: 1.05;
  font-stretch: condensed;
}

.masthead__brand-sub {
  margin-top: 0.4rem;
  font-size: 0.625rem;
  font-weight: 700;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--lime);
}

.masthead__quick {
  display: inline-flex;
  align-items: center;
  padding: 0.4rem 0.85rem;
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--mist);
  border: var(--rule) solid var(--stroke);
  background: transparent;
  transition: color 0.12s ease, background-color 0.12s ease, border-color 0.12s ease;
  white-space: nowrap;
}
.masthead__quick:hover {
  color: var(--night);
  background: var(--lime);
  border-color: var(--lime);
}
.masthead__quick--buy {
  color: var(--amber);
  border-color: var(--amber);
}
.masthead__quick--buy:hover {
  color: var(--night);
  background: var(--amber);
  border-color: var(--amber);
}

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  flex: 0 0 auto;
  border: var(--rule) solid var(--stroke);
  background: transparent;
  color: var(--mist);
  transition: color 0.12s ease, border-color 0.12s ease, background-color 0.12s ease;
}
.icon-btn:hover { color: var(--lime); border-color: var(--lime); }
.icon-btn[aria-expanded="true"] {
  background: var(--lime);
  border-color: var(--lime);
  color: var(--night);
}
.icon-btn__glyph { width: 19px; height: 19px; }

.nav-toggle {
  display: none;
  align-items: center;
  gap: 0.55rem;
  padding: 0.45rem 0.75rem;
  border: var(--rule) solid var(--stroke);
  color: var(--paper);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  transition: color 0.12s ease, background-color 0.12s ease, border-color 0.12s ease;
}
.nav-toggle:hover { border-color: var(--lime); color: var(--lime); }
.nav-toggle[aria-expanded="true"] {
  background: var(--lime);
  border-color: var(--lime);
  color: var(--night);
}
.nav-toggle__bars {
  display: inline-flex;
  flex-direction: column;
  gap: 3px;
  width: 16px;
}
.nav-toggle__bars span {
  display: block;
  height: 2px;
  background: currentColor;
}
.nav-toggle__bars span:nth-child(2) { width: 72%; }

/* ---------- 6. 导航 ---------- */
.site-nav {
  display: flex;
  justify-content: center;
  align-items: stretch;
  border-top: 1px solid var(--stroke);
  transition: max-height 0.22s ease, opacity 0.18s ease;
}

.site-nav__group {
  display: flex;
  align-items: stretch;
}

.site-nav__group + .site-nav__group { border-left: 1px solid var(--stroke); }

.site-nav__group-label { display: none; }

.site-nav__list {
  display: flex;
  align-items: stretch;
}

.site-nav__link {
  display: flex;
  align-items: center;
  padding: 0.8rem 1rem;
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--mist);
  text-decoration: none;
  border-left: 1px solid transparent;
  transition: color 0.12s ease, background-color 0.12s ease;
  white-space: nowrap;
}
.site-nav__link:hover {
  color: var(--paper);
  background: var(--stand);
}
.site-nav__link[aria-current="page"] {
  color: var(--night);
  background: var(--lime);
  font-weight: 800;
}

.site-nav__list--sub .site-nav__link:hover {
  color: var(--amber);
}

/* 桌面端滚动折叠 */
@media (min-width: 861px) {
  .site-nav { max-height: 260px; overflow: hidden; }
  .site-header[data-collapsed="true"] .site-nav {
    max-height: 0;
    opacity: 0;
    visibility: hidden;
  }
  .site-header[data-collapsed="true"] .masthead__rail { padding: 0.5rem 0; }
  .site-header[data-collapsed="true"] .masthead__brand-sub { display: none; }
}

/* ---------- 7. 快速跳转面板 ---------- */
.quickjump {
  display: none;
  position: absolute;
  right: var(--pad);
  top: 100%;
  z-index: 90;
  width: min(280px, calc(100% - var(--pad) * 2));
  padding: 1rem;
  background: var(--stand);
  border: var(--rule) solid var(--lime);
  box-shadow: var(--hard);
}
.quickjump[data-open="true"] { display: block; }

.quickjump__title {
  display: block;
  margin-bottom: 0.7rem;
}

.quickjump__list { display: grid; gap: 0.25rem; }

.quickjump__link {
  display: block;
  padding: 0.5rem 0.65rem;
  font-size: 0.875rem;
  color: var(--paper);
  text-decoration: none;
  border-left: 3px solid var(--stroke);
  transition: border-color 0.12s ease, color 0.12s ease, background-color 0.12s ease;
}
.quickjump__link:hover {
  border-left-color: var(--lime);
  color: var(--lime);
  background: var(--night);
}

/* ---------- 8. 滚动进度 ---------- */
.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  background: transparent;
  pointer-events: none;
}
.scroll-progress > span {
  display: block;
  width: 0;
  height: 100%;
  background: var(--lime);
  transition: width 0.1s linear;
}

/* ---------- 9. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.8rem 1.4rem;
  font-family: var(--font-display);
  font-size: 0.9375rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  text-decoration: none;
  color: var(--paper);
  background: transparent;
  border: var(--rule) solid var(--paper);
  box-shadow: var(--hard-sm);
  transition: transform 0.12s ease, box-shadow 0.12s ease, background-color 0.12s ease, color 0.12s ease, border-color 0.12s ease;
}
.btn:hover {
  transform: translate(-1px, -1px);
  box-shadow: 6px 6px 0 var(--edge);
}
.btn:active {
  transform: translate(2px, 2px);
  box-shadow: 1px 1px 0 var(--edge);
}
.btn--lime {
  background: var(--lime);
  border-color: var(--lime);
  color: var(--night);
}
.btn--lime:hover {
  background: var(--lime-dim);
  border-color: var(--lime-dim);
}
.btn--amber {
  background: var(--amber);
  border-color: var(--amber);
  color: var(--night);
}
.btn--ghost {
  border-color: var(--stroke);
  color: var(--paper);
  box-shadow: none;
}
.btn--ghost:hover {
  border-color: var(--lime);
  color: var(--lime);
  box-shadow: var(--hard-sm);
}
.btn--block {
  display: flex;
  width: 100%;
}

/* ---------- 10. 标签与徽标 ---------- */
.label {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: var(--fs-label);
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mist);
}
.label--lime { color: var(--lime); }
.label--amber { color: var(--amber); }

.tag {
  display: inline-block;
  padding: 0.15rem 0.55rem;
  font-size: 0.6875rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--mist);
  border: 1px solid var(--stroke);
  background: transparent;
}
.tag--lime { background: var(--lime); border-color: var(--lime); color: var(--night); }
.tag--amber { background: var(--amber); border-color: var(--amber); color: var(--night); }
.tag--coral { background: var(--coral); border-color: var(--coral); color: var(--night); }

/* ---------- 11. 数字 ---------- */
.num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.01em;
}
.num--xl {
  font-size: clamp(2.4rem, 1.5rem + 4.2vw, 4.5rem);
  line-height: 1;
}
.num--lime { color: var(--lime); }
.num--amber { color: var(--amber); }

/* ---------- 12. 容器与栅格 ---------- */
.container {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--pad);
}

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

.stack { display: grid; gap: var(--gap); }
.stack--tight { gap: calc(var(--gap) * 0.5); }

/* ---------- 13. 面板 ---------- */
.panel {
  position: relative;
  padding: var(--gap);
  background: var(--stand);
  border: var(--rule) solid var(--stroke);
  box-shadow: var(--hard);
  transition: transform 0.12s ease, border-color 0.12s ease;
}
.panel:hover {
  transform: translateY(-2px);
  border-color: var(--lime);
}
.panel--offset { margin-left: -16px; }
.panel--flat { box-shadow: none; }

.panel__head {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  padding-bottom: 0.75rem;
  margin-bottom: 1.1rem;
  border-bottom: var(--rule) solid var(--stroke);
}

.panel__no {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--lime);
  flex: 0 0 auto;
}

.panel__title {
  font-size: var(--fs-h3);
  font-weight: 800;
  letter-spacing: -0.01em;
  font-stretch: condensed;
}

.panel__body { color: var(--paper); }

/* ---------- 14. 面包屑 ---------- */
.breadcrumb { padding-top: 1rem; }

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8125rem;
  color: var(--mist);
}
.breadcrumb__list li:not(:first-child)::before {
  content: "/";
  margin-right: 0.5rem;
  color: var(--stroke);
}
.breadcrumb__list a {
  text-decoration: none;
  color: var(--mist);
  transition: color 0.12s ease;
}
.breadcrumb__list a:hover { color: var(--lime); }

/* ---------- 15. 正文容器 ---------- */
.prose {
  max-width: 38em;
  line-height: 1.75;
  color: var(--paper);
}
.prose--wide { max-width: 62em; }
.prose p + p { margin-top: 1em; }
.prose strong { color: var(--lime); font-weight: 800; }
.prose a {
  color: var(--paper);
  text-decoration: underline;
  text-decoration-color: var(--lime);
  text-underline-offset: 3px;
}
.prose a:hover { color: var(--lime); }

/* ---------- 16. 图片容器（供页面阶段使用） ---------- */
.media {
  position: relative;
  display: block;
  overflow: hidden;
  background: var(--edge);
  border: var(--rule) solid var(--stroke);
  margin: 0;
}
.media > img,
.media > video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.72) brightness(0.86);
}
.media--16x9 { aspect-ratio: 16 / 9; }
.media--4x3 { aspect-ratio: 4 / 3; }
.media--1x1 { aspect-ratio: 1 / 1; }
.media--3x4 { aspect-ratio: 3 / 4; }
.media--21x9 { aspect-ratio: 21 / 9; }

.media__wash {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(11, 31, 26, 0.1) 0%, rgba(7, 20, 16, 0.82) 100%);
}

.media__data {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  padding: 0.75rem;
}

.media__chip {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--night);
  background: var(--lime);
}
.media__chip--amber { background: var(--amber); }
.media__chip--chill { background: var(--chill); }

.media__caption {
  padding: 0.6rem 0.75rem;
  font-size: 0.8125rem;
  color: var(--mist);
  border-top: var(--rule) solid var(--stroke);
  background: var(--stand);
}

/* ---------- 17. 手风琴（可展开内容组） ---------- */
.accordion { border-top: var(--rule) solid var(--stroke); }

.accordion__item { border-bottom: var(--rule) solid var(--stroke); }

.accordion__trigger {
  display: flex;
  align-items: center;
  gap: 1rem;
  width: 100%;
  padding: 1.1rem 0.4rem;
  text-align: left;
  font-size: 1.0625rem;
  font-weight: 800;
  letter-spacing: 0.005em;
  color: var(--paper);
  transition: background-color 0.12s ease, color 0.12s ease;
}
.accordion__trigger:hover {
  background: var(--stand);
  color: var(--lime);
}
.accordion__trigger[aria-expanded="true"] {
  background: var(--stand);
  color: var(--lime);
}

.accordion__no {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--lime);
}

.accordion__q { flex: 1 1 auto; }

.accordion__sign {
  position: relative;
  flex: 0 0 auto;
  width: 16px;
  height: 16px;
}
.accordion__sign::before,
.accordion__sign::after {
  content: "";
  position: absolute;
  background: var(--lime);
  transition: transform 0.18s ease, opacity 0.18s ease;
}
.accordion__sign::before { left: 0; top: 7px; width: 16px; height: 2px; }
.accordion__sign::after { left: 7px; top: 0; width: 2px; height: 16px; }
.accordion__trigger[aria-expanded="true"] .accordion__sign::after {
  transform: scaleY(0);
  opacity: 0;
}

.accordion__panel {
  padding: 0 0.4rem 1.3rem;
  color: var(--mist);
  font-size: 0.9375rem;
}
.accordion__panel[hidden] { display: none; }

/* ---------- 18. 双轨切换 ---------- */
.switch {
  display: inline-flex;
  border: var(--rule) solid var(--stroke);
  background: var(--night);
}

.switch__tab {
  padding: 0.6rem 1.1rem;
  font-size: 0.8125rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--mist);
  transition: background-color 0.12s ease, color 0.12s ease;
}
.switch__tab + .switch__tab { border-left: var(--rule) solid var(--stroke); }
.switch__tab:hover { color: var(--paper); }
.switch__tab[aria-selected="true"] {
  background: var(--lime);
  color: var(--night);
}

/* ---------- 19. 显现动画 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.24s ease, transform 0.24s ease;
}
.reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 20. 页脚 ---------- */
.site-footer {
  margin-top: clamp(3rem, 6vw, 6rem);
  background: var(--edge);
  border-top: var(--rule) solid var(--stroke);
  color: var(--paper);
}

.foot-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr 1.2fr;
  gap: clamp(1.5rem, 3vw, 2.5rem);
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding: clamp(2rem, 5vw, 3.5rem) var(--pad);
  border-bottom: 1px solid var(--stroke);
}

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

.foot-col__title {
  margin-bottom: 1rem;
  font-size: var(--fs-label);
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mist);
}

.foot-col--brand .foot-brand {
  font-size: 1.375rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  color: var(--paper);
  font-stretch: condensed;
}
.foot-col--brand .foot-brand::after {
  content: "";
  display: block;
  width: 44px;
  height: 4px;
  margin-top: 0.7rem;
  background: var(--lime);
}

.foot-tagline {
  margin-top: 0.9rem;
  max-width: 24em;
  font-size: 0.9375rem;
  color: var(--mist);
}

.foot-list { display: grid; gap: 0.6rem; }

.foot-list a {
  font-size: 0.9375rem;
  color: var(--mist);
  text-decoration: none;
  transition: color 0.12s ease, padding-left 0.12s ease;
}
.foot-list a:hover {
  color: var(--lime);
  padding-left: 4px;
}

.foot-note {
  max-width: 22em;
  font-size: 0.875rem;
  color: var(--mist);
}
.foot-note + .foot-note { margin-top: 0.75rem; }
.foot-note--mono {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.04em;
}

.foot-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 2.5rem;
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding: 1.5rem var(--pad);
  border-bottom: 1px solid var(--stroke);
}

.foot-meta__item {
  font-size: 0.875rem;
  color: var(--paper);
  font-family: var(--font-mono);
  letter-spacing: 0.01em;
}

.foot-meta__key {
  display: block;
  margin-bottom: 0.2rem;
  font-family: var(--font-display);
  font-size: 0.625rem;
  font-weight: 800;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--mist);
}

.foot-band {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 1.25rem;
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding: 1rem var(--pad) 1.75rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  color: var(--mist);
}

.foot-band__item + .foot-band__item::before {
  content: "·";
  margin-right: 1.25rem;
  color: var(--lime);
}

/* ---------- 21. 响应式 ---------- */
@media (max-width: 1080px) {
  .foot-grid { grid-template-columns: 1.4fr 1fr 1fr; }
  .foot-col--update { grid-column: span 2; }
}

@media (max-width: 960px) {
  .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--5-7,
  .grid--7-5 { grid-template-columns: 1fr; }
}

@media (max-width: 860px) {
  .masthead__rail {
    grid-template-columns: 1fr auto;
    gap: 0.5rem;
    padding: 0.7rem 0;
  }
  .masthead__side--start { display: none; }
  .masthead__side--end { justify-content: flex-end; }
  .masthead__side--end .icon-btn { display: none; }
  .masthead__brand { align-items: flex-start; padding: 0; }
  .masthead__brand-mark { font-size: 1.05rem; }
  .masthead__brand-sub { letter-spacing: 0.2em; font-size: 0.5625rem; }
  .masthead__quick { padding: 0.35rem 0.6rem; font-size: 0.6875rem; letter-spacing: 0.1em; }

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

  .quickjump { display: none !important; }

  .site-nav {
    display: none;
    flex-direction: column;
    align-items: stretch;
    max-height: none;
    opacity: 1;
    visibility: visible;
    border-top: var(--rule) solid var(--stroke);
  }
  .site-nav[data-open="true"] { display: flex; }

  .site-nav__group {
    flex-direction: column;
    border-left: 0 !important;
  }
  .site-nav__group-label {
    display: block;
    padding: 0.9rem var(--pad) 0.35rem;
    letter-spacing: 0.2em;
  }
  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
  }
  .site-nav__link {
    padding: 0.85rem var(--pad);
    font-size: 1rem;
    border-left: 0;
    border-top: 1px solid var(--stroke);
  }

  .site-header[data-collapsed="true"] .site-nav {
    max-height: none;
    opacity: 1;
    visibility: visible;
  }
}

@media (max-width: 720px) {
  .grid--2,
  .grid--3,
  .grid--4 { grid-template-columns: 1fr; }

  .panel--offset { margin-left: 0; }

  .foot-grid { grid-template-columns: 1fr; }
  .foot-col--update { grid-column: auto; }
  .foot-band__item + .foot-band__item::before { margin-right: 0.75rem; }
  .foot-band { gap: 0.4rem 0.75rem; }
}

/* ---------- 22. 动效偏好 ---------- */
@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;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }

  .panel:hover { transform: none; }
}