/* ============================================================
   星力电玩中国站 · 共享样式 /assets/site.css
   深空夜场 × 数据仪表盘：左侧品牌轨道 + 非对称正文层
   ============================================================ */

/* ---------- 1. 设计变量 ---------- */
:root{
  --abyss:#060A1C;
  --night:#0B1230;
  --surface:#131C42;
  --raised:#1C2A5C;
  --cyan:#35E8E0;
  --violet:#A46BFF;
  --gold:#FFC24B;
  --text:#EAF0FF;
  --soft:#9FB0D8;
  --line:#2A3A72;
  --ok:#46E39B;

  --rail-w:108px;
  --topbar-h:58px;
  --shell:1240px;
  --gutter:22px;
  --r-card:24px;
  --r-sm:14px;
  --r-pill:999px;
  --ease:cubic-bezier(.22,.61,.36,1);

  --font-display:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-serif:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",Georgia,"Times New Roman",serif;
  --font-body:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,"JetBrains Mono","Cascadia Mono",Menlo,Consolas,"Courier New",monospace;
}

/* ---------- 2. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{
  -webkit-text-size-adjust:100%;
  text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:calc(var(--topbar-h) + 20px);
}
body,figure,blockquote,dl,dd,p,h1,h2,h3,h4,h5,h6,ul,ol,pre{margin:0}
ul,ol{list-style:none;padding:0}
img,svg,video{display:block;max-width:100%;height:auto}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0}
a{color:inherit;text-decoration:none}
table{border-collapse:collapse}

/* ---------- 3. 基础排版 ---------- */
body{
  min-height:100vh;
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.85;
  color:var(--text);
  background-color:var(--abyss);
  background-image:
    repeating-linear-gradient(90deg, rgba(42,58,114,.16) 0 1px, transparent 1px 96px),
    repeating-linear-gradient(0deg, rgba(42,58,114,.11) 0 1px, transparent 1px 96px),
    radial-gradient(1100px 620px at 82% -12%, rgba(164,107,255,.22), transparent 62%),
    radial-gradient(880px 520px at 4% 8%, rgba(53,232,224,.14), transparent 64%),
    linear-gradient(180deg, var(--abyss) 0%, var(--night) 46%, var(--abyss) 100%);
  background-attachment:fixed, fixed, fixed, fixed, fixed;
  overflow-x:hidden;
}
h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:900;
  letter-spacing:-.02em;
  line-height:1.18;
}
h1{font-size:clamp(34px,5.4vw,60px)}
h2{font-size:clamp(26px,3.6vw,42px)}
h3{font-size:clamp(20px,2.4vw,26px);letter-spacing:-.01em}
strong{color:#fff;font-weight:700}
::selection{background:rgba(53,232,224,.35);color:#fff}

.serif{font-family:var(--font-serif);font-weight:600;letter-spacing:.01em}
.mono{font-family:var(--font-mono)}
.glow{text-shadow:0 0 1px rgba(53,232,224,.9),0 0 18px rgba(53,232,224,.35)}
.text-soft{color:var(--soft)}

:focus-visible{outline:2px solid var(--cyan);outline-offset:3px}

/* ---------- 4. 跳转链接 ---------- */
.skip-link{
  position:fixed;
  left:16px;
  top:-72px;
  z-index:200;
  padding:11px 20px;
  border-radius:var(--r-pill);
  background:var(--cyan);
  color:#04121a;
  font-size:14px;
  font-weight:700;
  transition:top .22s var(--ease);
}
.skip-link:focus{top:14px}

/* ---------- 5. 页头 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
}
.topbar{
  position:relative;
  background:linear-gradient(180deg, rgba(11,18,48,.97), rgba(11,18,48,.84));
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border-bottom:1px solid rgba(42,58,114,.85);
}
.topbar::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:-1px;height:1px;
  background:linear-gradient(90deg,var(--cyan),var(--violet) 52%,rgba(164,107,255,0) 96%);
  opacity:.75;
  pointer-events:none;
}
.topbar__inner{
  display:flex;
  align-items:center;
  gap:14px;
  width:100%;
  max-width:var(--shell);
  margin:0 auto;
  padding:9px var(--gutter);
  min-height:var(--topbar-h);
}
.topbar__brandline{
  display:flex;
  align-items:center;
  gap:10px;
  min-width:0;
  font-size:14px;
  line-height:1.4;
}
.topbar__dot{
  flex:0 0 auto;
  width:9px;height:9px;
  border-radius:50%;
  background:var(--ok);
  box-shadow:0 0 10px var(--ok);
}
.topbar__brand{
  font-family:var(--font-display);
  font-weight:900;
  font-size:15.5px;
  letter-spacing:-.01em;
  white-space:nowrap;
}
.topbar__sep{color:var(--line)}
.topbar__motto{color:var(--soft);white-space:nowrap}
.topbar__paths{
  margin-left:auto;
  color:var(--soft);
  font-size:13px;
  letter-spacing:.02em;
  white-space:nowrap;
}
.topbar__cta{
  margin-left:auto;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:40px;
  padding:0 20px;
  border-radius:var(--r-pill);
  background:linear-gradient(120deg,var(--cyan),#82f4ec 70%,#b9fff9);
  color:#04121a;
  font-size:14px;
  font-weight:800;
  white-space:nowrap;
  box-shadow:0 8px 24px rgba(53,232,224,.24);
  transition:transform .25s var(--ease),box-shadow .25s var(--ease);
}
.topbar__cta:hover{transform:translateY(-2px);box-shadow:0 14px 30px rgba(53,232,224,.34)}

.scroll-progress{
  position:absolute;
  left:0;right:0;bottom:0;
  height:2px;
  background:rgba(42,58,114,.45);
  overflow:hidden;
  pointer-events:none;
}
.scroll-progress > span{
  display:block;
  width:0;
  height:100%;
  background:linear-gradient(90deg,var(--cyan),var(--violet));
  box-shadow:0 0 12px rgba(53,232,224,.6);
}

.nav-toggle{
  display:inline-flex;
  align-items:center;
  gap:9px;
  min-height:44px;
  padding:0 16px;
  border-radius:var(--r-pill);
  border:1px solid rgba(53,232,224,.45);
  background:linear-gradient(135deg, rgba(53,232,224,.16), rgba(164,107,255,.2));
  color:var(--text);
  font-size:14px;
  font-weight:700;
  cursor:pointer;
  transition:border-color .25s var(--ease),background .25s var(--ease);
}
.nav-toggle:hover{border-color:var(--cyan);background:var(--raised)}
.nav-toggle__bars{display:inline-flex;flex-direction:column;gap:4px;width:16px}
.nav-toggle__bars i{
  display:block;
  width:16px;height:2px;
  border-radius:2px;
  background:var(--cyan);
  transition:transform .28s var(--ease),opacity .2s var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:first-child{transform:translateY(3px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:last-child{transform:translateY(-3px) rotate(-45deg)}
.nav-toggle__text{letter-spacing:.06em}

/* ---------- 6. 主导航（窄屏：底部升起面板） ---------- */
.rail{
  position:fixed;
  left:12px;right:12px;bottom:12px;
  z-index:90;
  padding:14px 14px 16px;
  max-height:min(76vh,560px);
  overflow-y:auto;
  border:1px solid rgba(53,232,224,.34);
  border-radius:28px;
  background:linear-gradient(165deg, rgba(28,42,92,.99), rgba(11,18,48,.99));
  box-shadow:0 -22px 64px rgba(2,5,18,.72), 0 0 0 1px rgba(164,107,255,.18);
  opacity:0;
  visibility:hidden;
  transform:translateY(calc(100% + 30px));
  transition:transform .42s var(--ease), opacity .3s var(--ease), visibility .42s linear;
}
.rail[data-open]{
  opacity:1;
  visibility:visible;
  transform:translateY(0);
}
.rail__mark{display:none}
.rail__list{display:flex;flex-wrap:wrap;gap:8px}
.rail__item{flex:1 1 calc(50% - 8px);min-width:0}
.rail__link{
  display:flex;
  align-items:center;
  gap:9px;
  min-height:46px;
  padding:10px 14px;
  border:1px solid rgba(42,58,114,.9);
  border-radius:var(--r-pill);
  background:rgba(6,10,28,.55);
  color:var(--soft);
  font-size:14px;
  font-weight:600;
  transition:color .22s var(--ease),background .22s var(--ease),border-color .22s var(--ease);
}
.rail__idx{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--cyan);
}
.rail__label{line-height:1.3}
.rail__link:hover,.rail__link:focus-visible{
  color:var(--text);
  background:var(--raised);
  border-color:rgba(53,232,224,.6);
}
.rail__link[aria-current="page"]{
  color:#fff;
  border-color:rgba(53,232,224,.75);
  background:linear-gradient(120deg, rgba(53,232,224,.24), rgba(164,107,255,.24));
  box-shadow:0 0 22px rgba(53,232,224,.18);
}
.rail__note{
  display:none;
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.08em;
  color:var(--soft);
  opacity:.55;
  word-break:break-all;
}
body.nav-open{overflow:hidden}

/* ---------- 7. 通用容器与分区 ---------- */
.wrap{
  width:100%;
  max-width:var(--shell);
  margin:0 auto;
  padding:0 var(--gutter);
}
main{display:block}
#main-content:focus{outline:none}
.section{position:relative;padding:clamp(48px,7vw,96px) 0}
.section--tight{padding:clamp(30px,4vw,54px) 0}
.section--night{
  background:linear-gradient(180deg, rgba(11,18,48,0), rgba(19,28,66,.6) 34%, rgba(11,18,48,0));
}

/* ---------- 8. 组件：按钮 / 标签 / 卡片 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:9px;
  min-height:48px;
  padding:0 26px;
  border:1px solid transparent;
  border-radius:var(--r-pill);
  font-family:var(--font-body);
  font-size:15px;
  font-weight:700;
  cursor:pointer;
  transition:transform .25s var(--ease),box-shadow .25s var(--ease),background .25s var(--ease),border-color .25s var(--ease),color .25s var(--ease);
}
.btn--primary{
  background:linear-gradient(120deg,var(--cyan),#6ef0e8 58%,var(--violet));
  color:#04101c;
  box-shadow:0 12px 32px rgba(53,232,224,.24);
}
.btn--primary:hover{transform:translateY(-2px);box-shadow:0 18px 42px rgba(53,232,224,.34)}
.btn--ghost{
  border-color:rgba(42,58,114,.95);
  background:rgba(19,28,66,.72);
  color:var(--text);
}
.btn--ghost:hover{border-color:var(--cyan);background:var(--raised);color:#fff}
.btn--gold{
  background:linear-gradient(120deg,var(--gold),#ffe0a0);
  color:#241703;
  box-shadow:0 12px 30px rgba(255,194,75,.22);
}
.btn--gold:hover{transform:translateY(-2px)}
.btn--sm{min-height:40px;padding:0 18px;font-size:14px}
.btn--block{width:100%}

.chip{
  display:inline-flex;
  align-items:center;
  gap:9px;
  padding:7px 16px;
  border:1px solid rgba(164,107,255,.45);
  border-radius:var(--r-pill);
  background:linear-gradient(120deg, rgba(164,107,255,.18), rgba(53,232,224,.12));
  color:var(--text);
  font-size:12.5px;
  font-weight:700;
  letter-spacing:.14em;
}
.chip__num{font-family:var(--font-mono);letter-spacing:0;color:var(--cyan)}
.chip--gold{
  border-color:rgba(255,194,75,.5);
  background:linear-gradient(120deg, rgba(255,194,75,.18), rgba(255,194,75,.05));
}
.chip--gold .chip__num{color:var(--gold)}

.card{
  position:relative;
  padding:26px;
  border:1px solid rgba(42,58,114,.9);
  border-radius:var(--r-card);
  background:linear-gradient(160deg, rgba(28,42,92,.72), rgba(11,18,48,.92));
}
.card--raised{
  border-color:rgba(53,232,224,.28);
  background:linear-gradient(160deg, rgba(42,58,114,.82), rgba(19,28,66,.95));
  box-shadow:0 22px 54px rgba(2,5,18,.5);
}

/* ---------- 9. 面包屑 / 正文 / 旁注 / 指标 ---------- */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.06em;
  color:var(--soft);
}
.breadcrumb li{display:flex;align-items:center;gap:10px}
.breadcrumb li + li::before{content:"/";color:var(--line)}
.breadcrumb a{color:var(--soft);transition:color .2s var(--ease)}
.breadcrumb a:hover{color:var(--cyan)}
.breadcrumb [aria-current="page"]{color:var(--text)}

.prose{max-width:70ch;font-size:16.5px;line-height:1.9}
.prose p + p{margin-top:1.05em}
.prose p{color:var(--soft)}
.prose h2{margin:1.7em 0 .55em;font-size:clamp(24px,3vw,32px)}
.prose h3{margin:1.5em 0 .5em;font-size:19px;color:var(--text)}
.prose ul,.prose ol{margin:1em 0;padding-left:1.35em;color:var(--soft)}
.prose ul{list-style:disc}
.prose ol{list-style:decimal}
.prose li{margin:.42em 0}
.prose a{color:var(--cyan);border-bottom:1px solid rgba(53,232,224,.4)}
.prose a:hover{border-bottom-color:var(--cyan)}

.note{
  padding:6px 0 6px 16px;
  border-left:2px solid var(--violet);
  color:var(--soft);
  font-size:14px;
  line-height:1.8;
}

.metric{display:flex;flex-direction:column;gap:4px}
.metric__value{
  font-family:var(--font-mono);
  font-size:clamp(26px,3.4vw,40px);
  font-weight:700;
  letter-spacing:-.02em;
  color:var(--cyan);
}
.metric__label{font-size:12.5px;letter-spacing:.16em;color:var(--soft)}

.slash{
  height:1px;border:0;margin:36px 0;
  background:linear-gradient(90deg, transparent, rgba(53,232,224,.6), rgba(164,107,255,.6), transparent);
  transform:skewY(-1.1deg);
}
.dot{
  display:inline-block;
  width:8px;height:8px;
  border-radius:50%;
  background:var(--ok);
  box-shadow:0 0 10px var(--ok);
}

/* ---------- 10. 网格 ---------- */
.grid{display:grid;gap:22px}
.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))}

/* ---------- 11. 图片容器 ---------- */
.media-frame{
  position:relative;
  overflow:hidden;
  border:1px solid rgba(42,58,114,.9);
  border-radius:var(--r-card);
  aspect-ratio:16/9;
  background-image:
    radial-gradient(120% 90% at 18% 0%, rgba(53,232,224,.20), transparent 62%),
    radial-gradient(120% 90% at 92% 100%, rgba(164,107,255,.24), transparent 66%),
    repeating-linear-gradient(90deg, rgba(42,58,114,.28) 0 1px, transparent 1px 40px),
    linear-gradient(160deg, var(--surface), var(--abyss));
}
.media-frame img,.media-frame video{
  width:100%;height:100%;
  object-fit:cover;
}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--square{aspect-ratio:1/1}
.media-frame--tall{aspect-ratio:3/4}
.media-frame__caption{
  position:absolute;
  left:0;right:0;bottom:0;
  padding:18px 20px 14px;
  font-size:13px;
  color:var(--soft);
  background:linear-gradient(180deg, transparent, rgba(6,10,28,.92));
}

/* ---------- 12. 动效与显现 ---------- */
.js [data-reveal]{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .6s var(--ease), transform .6s var(--ease);
}
.js [data-reveal].is-visible{opacity:1;transform:none}

[data-toc-link]{transition:color .25s var(--ease),border-color .25s var(--ease)}
[data-toc-link][aria-current="true"]{color:var(--cyan)}

/* ---------- 13. 返回顶部 ---------- */
.to-top{
  position:fixed;
  right:24px;bottom:24px;
  z-index:95;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:46px;
  padding:0 22px;
  border:1px solid rgba(53,232,224,.5);
  border-radius:var(--r-pill);
  background:linear-gradient(140deg, rgba(28,42,92,.97), rgba(11,18,48,.97));
  color:var(--text);
  font-size:14px;
  font-weight:700;
  cursor:pointer;
  opacity:0;
  visibility:hidden;
  transform:translateY(14px);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  transition:opacity .3s var(--ease), transform .3s var(--ease), visibility .3s linear, border-color .25s var(--ease), box-shadow .25s var(--ease);
}
.to-top[data-show]{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{border-color:var(--cyan);box-shadow:0 0 26px rgba(53,232,224,.28)}
body.nav-open .to-top{opacity:0;visibility:hidden;transform:translateY(14px)}

/* ---------- 14. 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(56px,8vw,110px);
  padding:clamp(44px,6vw,76px) 0 0;
  border-top:1px solid rgba(42,58,114,.85);
  color:var(--text);
  background-image:
    radial-gradient(860px 340px at 10% 0%, rgba(164,107,255,.20), transparent 64%),
    radial-gradient(700px 300px at 90% 6%, rgba(53,232,224,.14), transparent 62%),
    linear-gradient(180deg, rgba(11,18,48,.55), var(--abyss) 72%);
}
.site-footer::before{
  content:"";
  position:absolute;
  top:-1px;left:0;right:0;height:2px;
  background:linear-gradient(90deg, transparent, var(--cyan) 22%, var(--violet) 68%, transparent);
  opacity:.85;
  pointer-events:none;
}
.footer__inner{
  display:grid;
  grid-template-columns:1.5fr .85fr .85fr 1.15fr;
  gap:36px;
  width:100%;
  max-width:var(--shell);
  margin:0 auto;
  padding:0 var(--gutter);
}
.footer__lead{min-width:0}
.footer__mark{
  display:flex;
  align-items:center;
  gap:12px;
  font-family:var(--font-display);
  font-size:25px;
  font-weight:900;
  letter-spacing:-.02em;
}
.footer__mark-glyph{
  display:grid;
  place-items:center;
  width:44px;height:44px;
  border-radius:var(--r-sm);
  background:linear-gradient(140deg, var(--cyan), var(--violet));
  color:#04101c;
  font-size:20px;
  box-shadow:0 0 26px rgba(53,232,224,.34);
}
.footer__note{
  margin-top:16px;
  max-width:34ch;
  font-size:14.5px;
  line-height:1.8;
  color:var(--soft);
}
.footer__status{
  display:inline-flex;
  align-items:center;
  gap:9px;
  margin-top:16px;
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.1em;
  color:var(--ok);
}
.footer__col{min-width:0}
.footer__title{
  margin-bottom:16px;
  font-family:var(--font-mono);
  font-size:12.5px;
  font-weight:700;
  letter-spacing:.2em;
  color:var(--cyan);
}
.footer__list{display:flex;flex-direction:column;gap:10px}
.footer__list a{
  display:inline-block;
  font-size:14.5px;
  color:var(--soft);
  transition:color .22s var(--ease), transform .22s var(--ease);
}
.footer__list a:hover{color:var(--cyan);transform:translateX(3px)}
.footer__list--plain{gap:16px}
.footer__list--plain li{display:flex;flex-direction:column;gap:2px;min-width:0}
.footer__key{font-size:11.5px;letter-spacing:.16em;color:var(--soft);opacity:.85}
.footer__val{font-size:14.5px;color:var(--text);line-height:1.6}
.footer__val--mono{font-family:var(--font-mono);letter-spacing:.01em;word-break:break-all}
.footer__base{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  width:100%;
  max-width:var(--shell);
  margin:clamp(32px,5vw,56px) auto 0;
  padding:20px var(--gutter) 30px;
  border-top:1px solid rgba(42,58,114,.6);
  font-size:13px;
  color:var(--soft);
}
.footer__icp{font-family:var(--font-mono);letter-spacing:.04em}
.footer__meta{font-family:var(--font-mono);letter-spacing:.04em}

/* ---------- 15. 响应式 ---------- */
@media (max-width:1100px){
  .topbar__paths{display:none}
}
@media (max-width:900px){
  :root{--gutter:18px}
  .footer__inner{grid-template-columns:1fr 1fr;gap:30px}
  .footer__lead{grid-column:1 / -1}
}
@media (max-width:860px){
  .topbar__motto,.topbar__sep{display:none}
  .topbar__brand{font-size:15px}
}
@media (max-width:620px){
  :root{--topbar-h:54px;--gutter:16px}
  .grid--2,.grid--3,.grid--4{grid-template-columns:1fr}
  .footer__inner{grid-template-columns:1fr}
  .footer__base{justify-content:flex-start}
  .to-top{right:16px;bottom:16px;padding:0 18px}
  .media-frame{aspect-ratio:4/3}
}
@media (max-width:520px){
  .nav-toggle__text{display:none}
  .nav-toggle{padding:0 14px}
  .topbar__cta{padding:0 14px;font-size:13px;min-height:38px}
  .topbar__inner{gap:10px}
}

@media (min-width:1200px){
  body{padding-left:var(--rail-w)}
  .rail{
    position:fixed;
    top:0;left:0;bottom:0;right:auto;
    display:flex;
    flex-direction:column;
    width:var(--rail-w);
    max-height:none;
    padding:12px 8px 18px;
    overflow:visible;
    border:0;
    border-right:1px solid rgba(42,58,114,.85);
    border-radius:0;
    background:linear-gradient(180deg, rgba(11,18,48,.99), rgba(6,10,28,.99));
    box-shadow:none;
    opacity:1;
    visibility:visible;
    transform:none;
    transition:none;
  }
  .rail::after{
    content:"";
    position:absolute;
    top:0;bottom:0;right:-1px;width:1px;
    background:linear-gradient(180deg, var(--cyan), var(--violet) 56%, rgba(164,107,255,0) 96%);
    opacity:.55;
    pointer-events:none;
  }
  .rail__mark{
    display:grid;
    place-items:center;
    width:52px;height:52px;
    margin:4px auto 14px;
    border-radius:18px;
    background:linear-gradient(140deg, var(--cyan), var(--violet));
    color:#04101c;
    font-family:var(--font-display);
    font-size:23px;
    font-weight:900;
    box-shadow:0 0 28px rgba(53,232,224,.35);
  }
  .rail__list{
    flex-direction:column;
    flex-wrap:nowrap;
    gap:6px;
    flex:1 1 auto;
    overflow-y:auto;
    padding:2px;
  }
  .rail__item{flex:0 0 auto;width:100%}
  .rail__link{
    display:block;
    padding:12px 10px;
    border:1px solid transparent;
    border-radius:18px;
    background:transparent;
    color:var(--soft);
  }
  .rail__link:hover,.rail__link:focus-visible{
    background:var(--surface);
    border-color:transparent;
  }
  .rail__link[aria-current="page"]{
    position:relative;
    color:#fff;
    border-color:rgba(53,232,224,.45);
    background:linear-gradient(150deg, rgba(53,232,224,.2), rgba(164,107,255,.18));
    box-shadow:inset 0 0 0 1px rgba(53,232,224,.25);
  }
  .rail__link[aria-current="page"]::before{
    content:"";
    position:absolute;
    left:-8px;top:14px;bottom:14px;width:3px;
    border-radius:3px;
    background:var(--cyan);
    box-shadow:0 0 12px var(--cyan);
  }
  .rail__idx{display:block;opacity:.8}
  .rail__label{
    display:block;
    margin-top:3px;
    font-size:13.5px;
    line-height:1.35;
    white-space:normal;
  }
  .rail__note{
    display:block;
    padding:12px 6px 0;
  }
}

/* ---------- 16. 降低动效偏好 ---------- */
@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}
}