/* ============================================================
   爱游戏赛场 · 共享样式 / assets/site.css
   01 变量与重置
   02 中文排版
   03 蓝图网格与页面骨架
   04 头部：侧边轨道 / 移动抽屉
   05 底部两场球快捷条
   06 页脚
   07 通用组件
   08 动效与无障碍
   ============================================================ */

/* ---------- 01 变量与重置 ---------- */
:root {
  --night: #08170F;
  --stand: #0E2419;
  --turf: #14352A;
  --grid: #1F5A42;
  --signal: #FF6A2E;
  --signal-soft: #FFB583;
  --blue: #3FA9F5;
  --blue-pale: #9BDCFF;
  --white: #F3F8F5;
  --muted: #9DB3A8;
  --yellow: #FFD24D;

  --line: rgba(31, 90, 66, .55);
  --line-soft: rgba(31, 90, 66, .3);
  --rail-w: 84px;
  --rail-open: 236px;
  --topbar-h: 62px;
  --quick-h: 64px;

  --font-display: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;

  --shadow-card: 0 22px 46px -30px rgba(0, 0, 0, .92);
  --ease: cubic-bezier(.2, .7, .2, 1);
}

*, *::before, *::after { box-sizing: border-box; }

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

body,
h1, h2, h3, h4, h5, p, ul, ol, figure, blockquote, dl, dd, fieldset { margin: 0; }
ul, ol { list-style: none; padding: 0; }
img, svg, video { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }
input, textarea, select { font: inherit; }
table { border-collapse: collapse; width: 100%; }
hr { border: 0; border-top: 1px solid var(--line); }

/* ---------- 02 中文排版 ---------- */
body {
  background-color: var(--night);
  color: var(--white);
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.85;
  letter-spacing: .01em;
  min-height: 100vh;
  padding-top: var(--topbar-h);
  padding-bottom: calc(var(--quick-h) + 28px);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

h1, h2, h3, h4 { font-weight: 700; line-height: 1.25; letter-spacing: -.02em; }
h5, h6 { font-weight: 500; line-height: 1.4; }

strong, b { font-weight: 700; color: var(--white); }
small { font-size: 12px; }

.display,
.display-s {
  font-family: var(--font-display);
  font-weight: 900;
  line-height: .94;
  letter-spacing: -.03em;
  transform: scaleX(.94);
  transform-origin: left center;
  display: block;
}
.display { font-size: clamp(48px, 9vw, 132px); }
.display-s { font-size: clamp(34px, 5.4vw, 72px); }

.eyebrow,
.index-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.4;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--muted);
}
.index-tag { color: var(--blue-pale); }

.lede {
  font-size: clamp(17px, 1.6vw, 20px);
  line-height: 1.8;
  color: rgba(243, 248, 245, .88);
  max-width: 40ch;
}

.prose {
  max-width: 62ch;
  font-size: 17px;
  line-height: 1.85;
  color: rgba(243, 248, 245, .86);
}
.prose p + p { margin-top: 1.1em; }
.prose h2, .prose h3 { margin-top: 2em; margin-bottom: .6em; }
.prose ul, .prose ol { margin: 1em 0; padding-left: 1.2em; }
.prose li { list-style: disc; margin: .35em 0; }
.prose a { color: var(--blue); text-decoration: underline; text-underline-offset: 3px; }
.prose a:hover { color: var(--signal-soft); }
.prose code {
  font-family: var(--font-mono);
  font-size: .92em;
  color: var(--yellow);
  background: rgba(255, 210, 77, .08);
  padding: 2px 6px;
  border-radius: 2px;
}

.mono { font-family: var(--font-mono); font-variant-numeric: tabular-nums; letter-spacing: .04em; }
.muted { color: var(--muted); }

/* ---------- 03 蓝图网格与页面骨架 ---------- */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(90deg, rgba(31, 90, 66, .26) 0 1px, transparent 1px 96px),
    repeating-linear-gradient(180deg, rgba(31, 90, 66, .18) 0 1px, transparent 1px 96px);
  -webkit-mask-image: radial-gradient(130% 95% at 18% 0%, #000 0%, rgba(0, 0, 0, .25) 62%, transparent 86%);
  mask-image: radial-gradient(130% 95% at 18% 0%, #000 0%, rgba(0, 0, 0, .25) 62%, transparent 86%);
}

#main-content {
  position: relative;
  z-index: 1;
  display: block;
  min-width: 0;
}

.container {
  width: 100%;
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 20px;
}

.grid-12 {
  display: grid;
  gap: 24px;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--muted);
}
.crumbs li + li::before { content: "/"; margin-right: 8px; color: var(--grid); }
.crumbs a { color: var(--blue-pale); }
.crumbs a:hover { color: var(--signal-soft); }
.crumbs [aria-current="page"] { color: var(--white); }

/* ---------- 04 头部：侧边轨道 / 移动抽屉 ---------- */
.skip-link {
  position: absolute;
  left: 12px;
  top: -120px;
  z-index: 140;
  padding: 10px 18px;
  border-radius: 2px;
  background: var(--signal);
  color: #08170F;
  font-weight: 700;
  font-size: 14px;
  transition: top 160ms var(--ease);
}
.skip-link:focus { top: 12px; }

.site-head {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 60;
  background: rgba(14, 36, 25, .96);
  border-bottom: 1px solid var(--line);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}

.head-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  height: var(--topbar-h);
  padding: 0 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}
.brand-mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  flex: 0 0 auto;
  border-radius: 2px;
  background: linear-gradient(140deg, var(--signal), var(--signal-soft));
  color: #08170F;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 18px;
  line-height: 1;
}
.brand-text {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: .12em;
  color: var(--white);
  white-space: nowrap;
}

.brand-stamp {
  display: flex;
  align-items: baseline;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--muted);
}
.stamp-label { color: var(--signal); }
.stamp-date { font-variant-numeric: tabular-nums; color: var(--blue-pale); }

.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 2px;
  background: rgba(20, 53, 42, .5);
  color: var(--white);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  transition: border-color 180ms, color 180ms, background-color 180ms;
}
.nav-toggle:hover { border-color: var(--signal); color: var(--signal-soft); }
.nav-toggle-ico {
  position: relative;
  width: 18px;
  height: 12px;
  background: linear-gradient(var(--signal), var(--signal)) center / 100% 2px no-repeat;
}
.nav-toggle-ico::before,
.nav-toggle-ico::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--signal);
  transition: transform 200ms var(--ease), opacity 200ms var(--ease);
}
.nav-toggle-ico::before { top: 0; }
.nav-toggle-ico::after { bottom: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle-ico { background: none; }
.nav-toggle[aria-expanded="true"] .nav-toggle-ico::before { transform: translateY(5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-ico::after { transform: translateY(-5px) rotate(-45deg); }

.rail-nav {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 70;
  width: min(84vw, 320px);
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 84px 16px 28px;
  overflow-y: auto;
  background: linear-gradient(180deg, var(--stand), var(--night) 88%);
  border-right: 1px solid var(--line);
  transform: translateX(-102%);
  visibility: hidden;
  transition: transform 300ms var(--ease), visibility 300ms var(--ease);
}
.rail-nav[data-open="true"] { transform: translateX(0); visibility: visible; }

.quick-jump {
  order: -1;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line-soft);
}

.rail-list { display: flex; flex-direction: column; gap: 2px; }
.rail-item { display: block; }

.rail-link {
  position: relative;
  display: grid;
  grid-template-columns: 30px 1fr;
  align-items: center;
  gap: 10px;
  min-height: 50px;
  padding: 8px 12px 8px 8px;
  border-radius: 2px;
  color: var(--muted);
  overflow: hidden;
  transition: color 180ms, background-color 180ms;
}
.rail-link::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 3px;
  height: 0;
  background: var(--signal);
  transform: translateY(-50%);
  transition: height 240ms var(--ease);
}
.rail-link:hover,
.rail-link:focus-visible { color: var(--white); background: rgba(31, 90, 66, .34); }
.rail-link[aria-current="page"] { color: var(--white); background: rgba(31, 90, 66, .26); }
.rail-link[aria-current="page"]::before { height: 26px; }

.rail-idx {
  font-family: var(--font-mono);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  letter-spacing: .04em;
  color: var(--blue);
}
.rail-link[aria-current="page"] .rail-idx { color: var(--signal); }

.rail-label {
  font-size: 15px;
  font-weight: 500;
  letter-spacing: .08em;
  white-space: nowrap;
}

.rail-side {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 18px 4px 0;
  margin-top: auto;
}
.rail-cta { width: 100%; }

.rail-cut {
  align-self: center;
  padding: 8px 12px;
  border: 1px solid var(--line-soft);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--muted);
  transition: color 180ms, border-color 180ms;
}
.rail-cut:hover { color: var(--signal-soft); border-color: var(--signal); }
.rail-cut[aria-pressed="true"] { color: var(--yellow); border-color: rgba(255, 210, 77, .5); }

.nav-backdrop {
  position: fixed;
  inset: 0;
  z-index: 65;
  border: 0;
  background: rgba(4, 12, 8, .74);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 260ms var(--ease), visibility 260ms var(--ease);
}
.rail-nav[data-open="true"] ~ .nav-backdrop {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.rail-progress {
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--signal), var(--blue));
  transform: scaleX(var(--pg, 0));
  transform-origin: left center;
  pointer-events: none;
}

@media (max-width: 899px) {
  html.nav-open { overflow: hidden; }
}

@media (max-width: 379px) {
  .brand-stamp { display: none; }
}

/* ---------- 05 底部两场球快捷条 ---------- */
.quick-bar {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 55;
  display: flex;
  align-items: center;
  gap: 14px;
  min-height: var(--quick-h);
  padding: 10px 16px;
  background: rgba(10, 24, 17, .94);
  border-top: 1px solid var(--line);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  transition: left 240ms var(--ease), right 240ms var(--ease), bottom 240ms var(--ease), border-radius 240ms var(--ease);
}
.quick-bar[data-folded="true"] {
  left: auto;
  right: 16px;
  bottom: 16px;
  min-height: 0;
  padding: 6px;
  border: 1px solid var(--line);
  border-radius: 999px;
  border-top-width: 1px;
}
.quick-bar[data-folded="true"] .qb-lead,
.quick-bar[data-folded="true"] .qb-links { display: none; }

.qb-lead {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--white);
  white-space: nowrap;
}
.qb-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--signal);
  box-shadow: 0 0 0 0 rgba(255, 106, 46, .6);
  animation: qb-pulse 2.6s var(--ease) infinite;
}
@keyframes qb-pulse {
  0% { box-shadow: 0 0 0 0 rgba(255, 106, 46, .55); }
  70% { box-shadow: 0 0 0 9px rgba(255, 106, 46, 0); }
  100% { box-shadow: 0 0 0 0 rgba(255, 106, 46, 0); }
}

.qb-links {
  display: flex;
  align-items: center;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
}
.qb-links::-webkit-scrollbar { display: none; }

.qb-fold {
  flex: 0 0 auto;
  margin-left: auto;
  padding: 7px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--muted);
  transition: color 180ms, border-color 180ms;
}
.qb-fold:hover { color: var(--signal-soft); border-color: var(--signal); }
.quick-bar[data-folded="true"] .qb-fold {
  margin-left: 0;
  border-color: transparent;
  padding: 8px 12px;
  color: var(--signal-soft);
}

/* ---------- 06 页脚 ---------- */
.site-foot {
  position: relative;
  z-index: 1;
  overflow: hidden;
  padding-top: 72px;
  background: linear-gradient(180deg, var(--stand) 0%, var(--night) 74%);
  border-top: 1px solid var(--line);
}
.site-foot::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 240px;
  pointer-events: none;
  background:
    radial-gradient(120% 100% at 10% 0%, rgba(255, 106, 46, .16), transparent 62%),
    radial-gradient(90% 100% at 82% 0%, rgba(63, 169, 245, .14), transparent 62%);
}

.foot-grid {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  width: 100%;
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 20px 56px;
}

.foot-col { min-width: 0; }
.foot-name {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 24px;
  letter-spacing: .04em;
  color: var(--white);
}
.foot-about {
  margin-top: 12px;
  max-width: 30ch;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.8;
}
.foot-tag {
  display: inline-flex;
  align-items: center;
  margin-top: 18px;
  padding: 4px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--blue-pale);
}
.foot-icp {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--muted);
}

.foot-title {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--signal);
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line-soft);
}

.foot-nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 6px 18px;
  margin-top: 18px;
}
.foot-nav a {
  padding: 6px 0;
  font-size: 14px;
  color: rgba(243, 248, 245, .78);
  transition: color 180ms, transform 180ms;
}
.foot-nav a:hover { color: var(--signal-soft); transform: translateX(3px); }

.foot-contact { margin-top: 18px; display: flex; flex-direction: column; gap: 12px; }
.foot-line {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line-soft);
}
.foot-line--wide { flex-direction: column; gap: 6px; }
.foot-k {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--muted);
}
.foot-v {
  flex: 1 1 auto;
  font-size: 14px;
  color: var(--white);
  word-break: break-word;
}
.foot-copy {
  flex: 0 0 auto;
  padding: 4px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--blue-pale);
  transition: color 180ms, border-color 180ms, background-color 180ms;
}
.foot-copy:hover { color: var(--night); background: var(--signal); border-color: var(--signal); }
.foot-note {
  font-size: 13px;
  line-height: 1.75;
  color: var(--muted);
  max-width: 34ch;
}

.foot-base {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  max-width: 1440px;
  margin: 0 auto;
  padding: 18px 20px 26px;
  border-top: 1px solid var(--line-soft);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--muted);
}
.foot-ver { color: var(--blue-pale); }

/* ---------- 07 通用组件 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: 2px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .08em;
  line-height: 1.2;
  text-align: center;
  transition: transform 180ms var(--ease), background-color 180ms, color 180ms, border-color 180ms;
}
.btn:hover { transform: translateY(-3px); }
.btn-signal {
  background: linear-gradient(135deg, var(--signal), var(--signal-soft));
  color: #08170F;
}
.btn-line {
  background: rgba(20, 53, 42, .6);
  border-color: var(--line);
  color: var(--white);
}
.btn-line:hover { border-color: var(--signal); color: var(--signal-soft); }
.btn-blue {
  background: var(--blue);
  color: #04170D;
}
.btn-blue:hover { background: var(--blue-pale); }

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 13px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(20, 53, 42, .55);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--white);
  white-space: nowrap;
  transition: color 180ms, border-color 180ms, background-color 180ms, transform 180ms;
}
.chip:hover { border-color: var(--blue); color: var(--blue-pale); transform: translateY(-2px); }
.chip-blue { color: var(--blue-pale); border-color: rgba(63, 169, 245, .42); }
.chip-signal { color: var(--signal-soft); border-color: rgba(255, 106, 46, .5); }
.chip-signal:hover { color: var(--night); background: var(--signal); border-color: var(--signal); }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--blue-pale);
  background: rgba(20, 53, 42, .5);
}
.tag--live { border-color: rgba(255, 210, 77, .5); color: var(--yellow); }
.tag--signal { border-color: rgba(255, 106, 46, .5); color: var(--signal-soft); }

.panel {
  background: var(--turf);
  border: 1px solid var(--line);
  border-radius: 2px;
  padding: 22px;
}

.section-head {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: end;
  gap: 16px 22px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--line);
}
.section-num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(30px, 4.4vw, 60px);
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px var(--grid);
  font-variant-numeric: tabular-nums;
}
@supports not (-webkit-text-stroke: 1px #000) {
  .section-num { color: var(--grid); }
}
.section-title {
  font-size: clamp(22px, 3vw, 40px);
  font-weight: 700;
  letter-spacing: -.02em;
  line-height: 1.2;
}

.ticket {
  position: relative;
  padding: 24px 24px 24px 30px;
  background: var(--turf);
  border: 2px solid var(--grid);
  border-radius: 2px;
  box-shadow: var(--shadow-card);
}
.ticket::before {
  content: "";
  position: absolute;
  left: 0;
  top: 14px;
  bottom: 14px;
  width: 8px;
  background-image: radial-gradient(circle, var(--night) 3.4px, transparent 3.6px);
  background-size: 8px 15px;
  background-repeat: repeat-y;
  background-position: left center;
}

.stack { position: relative; isolation: isolate; }
.stack::before,
.stack::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--stand);
  border: 1px solid var(--line);
  z-index: -1;
}
.stack::before { transform: translate(8px, 8px); }
.stack::after { transform: translate(4px, 4px); }

.exhibit {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--muted);
}
.exhibit-num { color: var(--signal); font-variant-numeric: tabular-nums; }

.media {
  position: relative;
  display: block;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 2px;
  background: var(--turf);
  aspect-ratio: 4 / 3;
}
.media > img,
.media > video,
.media > picture > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(158deg, rgba(63, 169, 245, .2), transparent 46%, rgba(255, 106, 46, .18)),
    linear-gradient(180deg, transparent 58%, rgba(8, 23, 15, .55));
}
.media--wide { aspect-ratio: 16 / 9; }
.media--tall { aspect-ratio: 3 / 4; }
.media--square { aspect-ratio: 1 / 1; }
.media--tilt { transform: rotate(-1.4deg); }

.stat { display: flex; flex-direction: column; gap: 6px; }
.stat-num {
  font-family: var(--font-mono);
  font-size: clamp(28px, 4vw, 46px);
  font-weight: 700;
  line-height: 1;
  color: var(--yellow);
  font-variant-numeric: tabular-nums;
}

.accordion { border-top: 1px solid var(--line); }
.accordion-item { border-bottom: 1px solid var(--line); }
.accordion-trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  padding: 20px 0;
  text-align: left;
  font-size: 17px;
  font-weight: 500;
  color: var(--white);
  transition: color 180ms;
}
.accordion-trigger:hover { color: var(--signal-soft); }
.accordion-trigger::after {
  content: "+";
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 20px;
  color: var(--signal);
  transition: transform 200ms var(--ease);
}
.accordion-trigger[aria-expanded="true"]::after { transform: rotate(45deg); }
.accordion-panel {
  display: none;
  padding: 0 0 22px;
  max-width: 62ch;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.8;
}
.accordion-panel[data-open="true"] { display: block; }

/* ---------- 08 动效与无障碍 ---------- */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 380ms var(--ease), transform 380ms var(--ease);
  will-change: opacity, transform;
}
.js [data-reveal].is-in {
  opacity: 1;
  transform: none;
}

:focus-visible {
  outline: 2px solid var(--blue-pale);
  outline-offset: 3px;
  border-radius: 2px;
}

@media (min-width: 768px) {
  .container { padding: 0 32px; }
  .foot-grid { padding: 0 32px 56px; gap: 44px; }
  .foot-base { padding: 18px 32px 28px; }
  .grid-12 { grid-template-columns: repeat(8, minmax(0, 1fr)); }
  .site-foot { padding-top: 96px; }
}

@media (min-width: 900px) {
  body {
    padding-top: 0;
    padding-left: var(--rail-w);
    padding-bottom: calc(var(--quick-h) + 36px);
  }

  .site-head {
    right: auto;
    bottom: 0;
    width: var(--rail-w);
    height: 100vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: linear-gradient(180deg, var(--stand) 0%, var(--night) 72%);
    border-right: 1px solid var(--line);
    border-bottom: 0;
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
    transition: width 280ms var(--ease);
  }
  .site-head:hover,
  .site-head:focus-within { width: var(--rail-open); }
  .site-head[data-compact="true"]:hover,
  .site-head[data-compact="true"]:focus-within { width: var(--rail-w); }

  .head-bar {
    flex-direction: column;
    justify-content: flex-start;
    height: auto;
    gap: 14px;
    padding: 22px 0 16px;
    border-bottom: 1px solid var(--line);
  }
  .brand { flex-direction: column; gap: 12px; }
  .brand-text {
    writing-mode: vertical-rl;
    font-size: 14px;
    letter-spacing: .22em;
  }
  .brand-stamp {
    flex-direction: column;
    align-items: center;
    gap: 6px;
  }
  .brand-stamp .stamp-label { writing-mode: horizontal-tb; }
  .stamp-date { writing-mode: vertical-rl; letter-spacing: .16em; }

  .nav-toggle { display: none; }

  .rail-nav {
    position: static;
    width: auto;
    flex: 1 1 auto;
    min-height: 0;
    padding: 14px 0 0;
    overflow-y: auto;
    overflow-x: hidden;
    background: none;
    border-right: 0;
    transform: none;
    visibility: visible;
    transition: none;
  }

  .quick-jump { display: none; }

  .rail-link {
    grid-template-columns: 26px 1fr;
    padding: 0 12px 0 20px;
    border-radius: 0;
  }
  .rail-label {
    opacity: 0;
    transform: translateX(-8px);
    transition: opacity 200ms var(--ease), transform 200ms var(--ease);
  }
  .site-head:hover .rail-label,
  .site-head:focus-within .rail-label { opacity: 1; transform: none; }
  .site-head[data-compact="true"]:hover .rail-label,
  .site-head[data-compact="true"]:focus-within .rail-label { opacity: 0; transform: translateX(-8px); }

  .rail-side {
    align-items: center;
    gap: 14px;
    padding: 18px 10px 22px;
  }
  .rail-cta {
    width: auto;
    writing-mode: vertical-rl;
    padding: 16px 11px;
    min-height: 0;
    font-size: 13px;
    letter-spacing: .14em;
  }
  .rail-cut { writing-mode: horizontal-tb; }

  .nav-backdrop { display: none; }

  .rail-progress {
    left: auto;
    right: 0;
    top: 0;
    bottom: auto;
    width: 2px;
    height: 100%;
    background: linear-gradient(180deg, var(--signal), var(--blue));
    transform: scaleY(var(--pg, 0));
    transform-origin: top center;
  }

  .quick-bar { padding-left: calc(var(--rail-w) + 28px); }
  .quick-bar[data-folded="true"] { padding-left: 6px; }
}

@media (min-width: 1100px) {
  .container { padding: 0 56px; }
  .site-foot { padding-top: 112px; }
  .foot-grid {
    grid-template-columns: 1.5fr 1fr 1.4fr;
    gap: 56px;
    padding: 0 56px 64px;
  }
  .foot-base { padding: 20px 56px 30px; }
  .grid-12 { grid-template-columns: repeat(12, minmax(0, 1fr)); gap: 28px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }
  .js [data-reveal] { opacity: 1; transform: none; }
  .qb-dot { animation: none; }
  .btn:hover, .chip:hover, .foot-nav a:hover { transform: none; }
}