/* ==========================================================================
   利来体育 · 共享样式表 /assets/site.css
   夜间观赛数据台：深蓝底 + 荧光绿焦点 + 暖橙时间戳
   ========================================================================== */

/* ---------- 1. 设计令牌 ---------- */
:root{
  --night:#050B1A;
  --stand:#0A1630;
  --panel:#10244D;
  --line:#1C3A73;
  --neon:#39FF88;
  --amber:#FF8A3D;
  --ice:#E6F1FF;
  --mist:#8FA8C8;
  --moss:#0D2B1F;
  --ember:#3A1D0F;

  --neon-soft:rgba(57,255,136,.16);
  --amber-soft:rgba(255,138,61,.18);
  --edge:rgba(28,58,115,.72);
  --shadow-hard:8px 8px 0 0 rgba(3,7,16,.92);

  --shell:1280px;
  --gutter:clamp(18px,4vw,52px);
  --header-h:112px;

  --font-display:"Inter Tight","Alibaba PuHuiTi 3.0","Noto Sans SC","PingFang SC",sans-serif;
  --font-body:"Noto Sans SC","Source Han Sans SC","PingFang SC",system-ui,sans-serif;
  --font-mono:"JetBrains Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}

/* ---------- 2. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{
  background:var(--night);
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
}
body{
  margin:0;
  background:transparent;
  color:var(--ice);
  font-family:var(--font-body);
  font-weight:400;
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  word-break:break-word;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:-1;
  pointer-events:none;
  opacity:.55;
  background-image:
    linear-gradient(to right,rgba(28,58,115,.34) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(28,58,115,.34) 1px,transparent 1px);
  background-size:96px 96px;
}
h1,h2,h3,h4,h5,p,figure,blockquote,ul,ol,dl{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
table{border-collapse:collapse;width:100%}
::selection{background:var(--neon);color:var(--night)}
[id]{scroll-margin-top:calc(var(--header-h) + 16px)}
main{display:block}
#main-content{display:block}

:focus-visible{outline:3px solid var(--neon);outline-offset:3px}
:focus:not(:focus-visible){outline:none}

/* ---------- 3. 基础排版与容器 ---------- */
.shell{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.shell--narrow{max-width:880px}

.page{padding-block:clamp(28px,5vw,72px)}
.stack{display:grid;gap:clamp(14px,2vw,24px)}

.page-head{
  padding-block:clamp(30px,5vw,74px);
  border-bottom:2px solid var(--line);
}
.page-head__label{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.24em;
  color:var(--amber);
  text-transform:uppercase;
}
.page-head__title{
  margin-top:16px;
  font-family:var(--font-display);
  font-weight:200;
  font-size:clamp(2.4rem,6vw,5rem);
  line-height:1.02;
  letter-spacing:-.03em;
}
.page-head__title strong{font-weight:800}
.page-head__lede{
  margin-top:20px;
  max-width:64ch;
  color:var(--mist);
  font-size:clamp(1rem,1.35vw,1.125rem);
}

.section{padding-block:clamp(36px,6vw,88px)}
.section__head{
  display:grid;
  gap:12px;
  max-width:900px;
  margin-bottom:clamp(20px,3vw,44px);
}
.section__label{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.24em;
  color:var(--neon);
  text-transform:uppercase;
}
.section__label::before{
  content:"";
  width:26px;
  height:2px;
  background:var(--neon);
}
.section__title{
  font-family:var(--font-display);
  font-weight:200;
  font-size:clamp(2rem,4vw,3.6rem);
  line-height:1.06;
  letter-spacing:-.02em;
}
.section__title strong{font-weight:800}
.section__note{color:var(--mist);font-size:15px;max-width:64ch}
.lede{font-size:clamp(1rem,1.4vw,1.125rem);color:var(--mist);max-width:60ch}

.side-note{
  border-left:3px solid var(--amber);
  padding:4px 0 4px 14px;
  font-family:var(--font-mono);
  font-size:13px;
  line-height:1.7;
  color:var(--mist);
  background:linear-gradient(90deg,var(--amber-soft),transparent 70%);
}

/* ---------- 4. 跳转链接 ---------- */
.skip-link{
  position:fixed;
  left:14px;
  top:-90px;
  z-index:300;
  padding:12px 18px;
  background:var(--neon);
  color:var(--night);
  font-family:var(--font-display);
  font-weight:800;
  font-size:14px;
  letter-spacing:.08em;
  border:2px solid var(--night);
  box-shadow:4px 4px 0 0 var(--line);
  transition:top .18s ease;
}
.skip-link:focus{top:14px}

/* ---------- 5. 头部 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:120;
  background:var(--night);
  border-bottom:2px solid var(--line);
}
.scroll-progress{
  position:absolute;
  left:0;
  bottom:0;
  width:100%;
  height:3px;
  background:var(--neon);
  transform:scaleX(0);
  transform-origin:0 50%;
  z-index:3;
  pointer-events:none;
}

.header-top{
  background:var(--night);
  border-bottom:1px solid var(--edge);
}
.header-top__inner{
  display:flex;
  align-items:center;
  gap:clamp(14px,2.4vw,32px);
  min-height:46px;
  padding-block:9px;
}

.brand{display:inline-flex;align-items:center;gap:11px;flex:0 0 auto}
.brand__mark{
  width:12px;
  height:12px;
  background:var(--neon);
  transform:rotate(45deg);
  box-shadow:0 0 0 3px var(--neon-soft);
}
.brand__text{display:flex;flex-direction:column;line-height:1.14}
.brand__name{
  font-family:var(--font-display);
  font-weight:800;
  font-size:15px;
  letter-spacing:.16em;
  color:var(--ice);
}
.brand__domain{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.06em;
  color:var(--mist);
}
.header-top__line{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.04em;
  color:var(--mist);
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}
.header-top__meta{
  margin-left:auto;
  display:flex;
  align-items:center;
  gap:clamp(12px,2vw,22px);
  flex:0 0 auto;
}
.header-top__clock{
  display:inline-flex;
  align-items:center;
  gap:7px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.1em;
  color:var(--amber);
}
.header-top__clock::before{
  content:"";
  width:6px;
  height:6px;
  background:var(--amber);
  border-radius:50%;
  box-shadow:0 0 0 3px var(--amber-soft);
}
.utility-nav{display:flex;align-items:center;gap:clamp(10px,1.6vw,18px)}
.utility-nav__item{display:inline-flex}
.utility-nav__link{
  position:relative;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  color:var(--mist);
  padding-bottom:2px;
  transition:color .18s ease;
}
.utility-nav__link::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:0;
  height:1px;
  background:var(--neon);
  transform:scaleX(0);
  transform-origin:0 50%;
  transition:transform .2s ease;
}
.utility-nav__link:hover,
.utility-nav__link:focus-visible{color:var(--neon)}
.utility-nav__link:hover::after,
.utility-nav__link:focus-visible::after{transform:scaleX(1)}

.header-bottom{background:var(--stand)}
.header-bottom__inner{
  display:flex;
  align-items:center;
  gap:clamp(14px,2.4vw,32px);
  min-height:64px;
  padding-block:8px;
}

.site-nav{flex:1 1 auto;min-width:0}
.site-nav__list{
  display:flex;
  align-items:center;
  gap:clamp(8px,1.5vw,24px);
}
.site-nav__item{display:inline-flex}
.site-nav__link{
  position:relative;
  display:inline-flex;
  align-items:baseline;
  gap:7px;
  padding:10px 2px;
  font-family:var(--font-display);
  font-weight:700;
  font-size:15px;
  letter-spacing:.06em;
  color:var(--ice);
  transition:color .18s ease;
}
.site-nav__link::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:4px;
  height:2px;
  background:var(--neon);
  transform:scaleX(0);
  transform-origin:0 50%;
  transition:transform .22s ease;
}
.site-nav__index{
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:400;
  color:var(--mist);
  letter-spacing:0;
  transition:color .18s ease;
}
.site-nav__link:hover,
.site-nav__link:focus-visible{color:var(--neon)}
.site-nav__link:hover::after,
.site-nav__link:focus-visible::after{transform:scaleX(1)}
.site-nav__link[aria-current="page"]{color:var(--neon)}
.site-nav__link[aria-current="page"]::after{transform:scaleX(1)}
.site-nav__link[aria-current="page"] .site-nav__index{color:var(--amber)}

.header-cta{
  flex:0 0 auto;
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:11px 18px;
  background:var(--neon);
  border:2px solid var(--neon);
  color:var(--night);
  font-family:var(--font-display);
  font-weight:800;
  font-size:13px;
  letter-spacing:.1em;
  box-shadow:4px 4px 0 0 var(--line);
  transition:transform .16s ease,box-shadow .16s ease,background .16s ease;
}
.header-cta:hover,
.header-cta:focus-visible{
  transform:translate(3px,3px);
  box-shadow:1px 1px 0 0 var(--line);
  background:#5cffa0;
}

.nav-toggle{
  display:none;
  align-items:center;
  gap:10px;
  padding:10px 14px;
  border:2px solid var(--line);
  background:var(--panel);
  color:var(--ice);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.18em;
  transition:border-color .18s ease,color .18s ease,background .18s ease;
}
.nav-toggle__bars{display:grid;gap:4px;width:18px}
.nav-toggle__bars span{display:block;height:2px;background:var(--neon)}
.nav-toggle__bars span:nth-child(2){width:72%}
.nav-toggle:hover{border-color:var(--neon)}
.nav-toggle[aria-expanded="true"]{
  border-color:var(--neon);
  color:var(--neon);
  background:var(--moss);
}

/* ---------- 6. 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(56px,8vw,120px);
  background:var(--stand);
  border-top:4px solid var(--line);
  color:var(--ice);
}
.site-footer::before{
  content:"";
  position:absolute;
  left:0;right:0;top:-4px;
  height:2px;
  background:linear-gradient(90deg,var(--neon),rgba(57,255,136,0) 58%);
}

.footer-band{
  border-bottom:1px solid var(--edge);
  overflow:hidden;
}
.footer-band__inner{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  gap:14px;
  padding-block:clamp(16px,3vw,34px);
}
.footer-band__word{
  font-family:var(--font-display);
  font-weight:200;
  font-size:clamp(3rem,11vw,8.5rem);
  line-height:.86;
  letter-spacing:-.05em;
  color:rgba(230,241,255,.09);
  -webkit-text-stroke:1px rgba(28,58,115,.95);
}
.footer-band__tag{
  margin-left:auto;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.24em;
  color:var(--mist);
}

.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.5fr;
  gap:clamp(24px,3vw,52px);
  padding-block:clamp(36px,5vw,68px);
}

.footer-brand{display:grid;gap:14px;align-content:start}
.footer-brand__mark{
  font-family:var(--font-display);
  font-weight:800;
  font-size:clamp(1.5rem,2.6vw,2rem);
  letter-spacing:.16em;
  color:var(--ice);
}
.footer-brand__statement{
  max-width:34ch;
  font-size:14px;
  color:var(--mist);
  line-height:1.8;
}

.footer-col{display:grid;gap:12px;align-content:start}
.footer-col__title{
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:400;
  letter-spacing:.24em;
  color:var(--amber);
  text-transform:uppercase;
}
.footer-col__list{display:grid;gap:10px}
.footer-col__link{
  position:relative;
  display:inline-block;
  font-size:14px;
  color:var(--mist);
  transition:color .18s ease,transform .18s ease;
}
.footer-col__link::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:-2px;
  height:1px;
  background:var(--neon);
  transform:scaleX(0);
  transform-origin:0 50%;
  transition:transform .2s ease;
}
.footer-col__link:hover,
.footer-col__link:focus-visible{color:var(--ice)}
.footer-col__link:hover::after,
.footer-col__link:focus-visible::after{transform:scaleX(1)}

.footer-contact{
  display:grid;
  gap:12px;
  align-content:start;
  padding:clamp(16px,2vw,22px);
  background:var(--panel);
  border:2px solid var(--line);
  box-shadow:var(--shadow-hard);
}
.footer-contact__row{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  gap:8px 10px;
  font-size:13px;
}
.footer-contact__key{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--neon);
  min-width:40px;
}
.footer-contact__val{color:var(--ice);word-break:break-all}
.footer-contact__note{
  font-size:12px;
  line-height:1.7;
  color:var(--mist);
  padding-top:8px;
  border-top:1px solid var(--edge);
}
.copy-btn{
  padding:3px 9px;
  border:1px dashed var(--line);
  background:transparent;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.08em;
  color:var(--mist);
  transition:border-color .18s ease,color .18s ease,background .18s ease;
}
.copy-btn:hover,
.copy-btn:focus-visible{border-color:var(--neon);color:var(--neon)}
.copy-btn[data-copied="true"]{
  border-style:solid;
  border-color:var(--neon);
  background:var(--moss);
  color:var(--neon);
}

.footer-base{
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  align-items:center;
  gap:10px 20px;
  padding-block:18px;
  border-top:1px solid var(--edge);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.06em;
  color:var(--mist);
}
.footer-base__copy{color:var(--mist)}
.footer-base__icp{color:var(--mist)}

.to-top{
  position:fixed;
  right:clamp(12px,2vw,28px);
  bottom:clamp(12px,2vw,28px);
  z-index:90;
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:11px 15px;
  border:2px solid var(--line);
  background:var(--panel);
  color:var(--ice);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  box-shadow:4px 4px 0 0 rgba(3,7,16,.9);
  opacity:0;
  visibility:hidden;
  transform:translateY(10px);
  transition:opacity .2s ease,transform .2s ease,visibility .2s ease,border-color .18s ease;
}
.to-top[data-visible="true"]{opacity:1;visibility:visible;transform:none}
.to-top:hover,
.to-top:focus-visible{border-color:var(--neon);color:var(--neon)}

/* ---------- 7. 通用按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:13px 22px;
  border:2px solid var(--line);
  background:var(--panel);
  color:var(--ice);
  font-family:var(--font-display);
  font-weight:700;
  font-size:14px;
  letter-spacing:.09em;
  box-shadow:6px 6px 0 0 rgba(3,7,16,.92);
  transition:transform .16s ease,box-shadow .16s ease,border-color .16s ease,background .16s ease,color .16s ease;
}
.btn:hover,
.btn:focus-visible{
  transform:translate(3px,3px);
  box-shadow:2px 2px 0 0 rgba(3,7,16,.92);
  border-color:var(--neon);
}
.btn--primary{
  background:var(--neon);
  border-color:var(--neon);
  color:var(--night);
}
.btn--primary:hover,
.btn--primary:focus-visible{background:#5cffa0;border-color:#5cffa0}
.btn--ghost{background:transparent;color:var(--ice)}
.btn--amber{border-color:var(--amber);color:var(--amber);background:var(--ember)}
.btn-row{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px}

/* ---------- 8. 面包屑 ---------- */
.breadcrumb{
  padding-block:14px;
  border-bottom:1px solid var(--edge);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.08em;
  color:var(--mist);
}
.breadcrumb__list{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.breadcrumb__item{display:inline-flex;align-items:center;gap:8px}
.breadcrumb__sep{color:var(--line)}
.breadcrumb__link{color:var(--mist);transition:color .18s ease}
.breadcrumb__link:hover,.breadcrumb__link:focus-visible{color:var(--neon)}
.breadcrumb__current{color:var(--ice)}

/* ---------- 9. 网格 ---------- */
.grid{display:grid;gap:clamp(16px,2.4vw,28px)}
.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--asym{grid-template-columns:1.35fr .95fr}
.grid--lab{grid-template-columns:repeat(12,minmax(0,1fr))}
.span-4{grid-column:span 4}
.span-5{grid-column:span 5}
.span-7{grid-column:span 7}
.span-8{grid-column:span 8}

/* ---------- 10. 数据卡片 ---------- */
.data-card{
  position:relative;
  display:grid;
  gap:10px;
  align-content:start;
  padding:clamp(16px,2.4vw,26px);
  background:var(--panel);
  border:2px solid var(--line);
  box-shadow:var(--shadow-hard);
  transition:border-color .2s ease,transform .2s ease,box-shadow .2s ease;
}
.data-card:hover{
  border-color:var(--neon);
  transform:translate(-2px,-2px);
  box-shadow:11px 11px 0 0 rgba(3,7,16,.92);
}
.data-card__tag{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.18em;
  color:var(--amber);
  text-transform:uppercase;
}
.data-card__value{
  font-family:var(--font-display);
  font-weight:200;
  font-size:clamp(2.4rem,5vw,4rem);
  line-height:1;
  letter-spacing:-.03em;
  color:var(--ice);
}
.data-card__value em{font-style:normal;color:var(--neon)}
.data-card__label{font-size:14px;color:var(--mist);line-height:1.7}
.data-card--neon{border-color:rgba(57,255,136,.6)}
.data-card--moss{background:var(--moss);border-color:rgba(57,255,136,.34)}
.data-card--moss .data-card__label{color:#9fd8bd}
.data-card--ember{background:var(--ember);border-color:rgba(255,138,61,.42)}
.data-card--ember .data-card__label{color:#f0c3a4}

/* ---------- 11. 展签与目录 ---------- */
.exhibit{
  display:flex;
  align-items:baseline;
  gap:14px;
  padding-bottom:10px;
  border-bottom:1px solid var(--edge);
}
.exhibit__no{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.2em;
  color:var(--neon);
}
.exhibit__title{
  font-family:var(--font-display);
  font-weight:700;
  font-size:clamp(1.05rem,1.6vw,1.35rem);
  letter-spacing:.02em;
}
.exhibit__meta{
  margin-left:auto;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.08em;
  color:var(--mist);
}

.index-list{display:grid;border-top:2px solid var(--line)}
.index-list__item{
  display:grid;
  grid-template-columns:auto 1fr auto;
  gap:16px;
  align-items:center;
  padding:18px 4px;
  border-bottom:1px solid var(--edge);
  transition:background .2s ease,padding-left .2s ease;
}
.index-list__item:hover{background:rgba(16,36,77,.6);padding-left:14px}
.index-list__no{font-family:var(--font-mono);font-size:12px;color:var(--mist)}
.index-list__title{
  font-family:var(--font-display);
  font-weight:700;
  font-size:clamp(1.05rem,2vw,1.5rem);
  letter-spacing:.01em;
}
.index-list__meta{font-family:var(--font-mono);font-size:11px;color:var(--amber)}

/* ---------- 12. 标签 ---------- */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 10px;
  border:1px solid var(--line);
  background:rgba(16,36,77,.7);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--mist);
}
.tag--neon{
  border-color:rgba(57,255,136,.5);
  background:var(--moss);
  color:var(--neon);
}
.tag--amber{
  border-color:rgba(255,138,61,.5);
  background:var(--ember);
  color:var(--amber);
}
.tag-row{display:flex;flex-wrap:wrap;gap:8px}

/* ---------- 13. 图片容器 ---------- */
.media-frame{
  position:relative;
  border:2px solid var(--line);
  background:linear-gradient(155deg,var(--panel),var(--night) 78%);
  box-shadow:var(--shadow-hard);
  overflow:hidden;
}
.media-frame__inner{
  position:relative;
  aspect-ratio:16/9;
  display:grid;
  place-items:center;
}
.media-frame img,
.media-frame video{width:100%;height:100%;object-fit:cover;display:block}
.media-frame--4x3 .media-frame__inner{aspect-ratio:4/3}
.media-frame--1x1 .media-frame__inner{aspect-ratio:1/1}
.media-frame--wide .media-frame__inner{aspect-ratio:21/9}
.media-frame__cap{
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:10px;
  padding:10px 14px;
  border-top:2px solid var(--line);
  background:rgba(5,11,26,.7);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.08em;
  color:var(--mist);
}
.media-frame__placeholder{
  padding:18px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.2em;
  color:var(--mist);
  text-align:center;
}

/* ---------- 14. 显现 ---------- */
[data-reveal]{
  opacity:0;
  transform:translateY(14px);
  transition:opacity .5s ease,transform .5s ease;
}
[data-reveal].is-visible{opacity:1;transform:none}

/* ---------- 15. 响应式 ---------- */
@media (max-width:1100px){
  .grid--4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid--asym{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:1000px){
  :root{--header-h:104px}
  .site-nav__index{display:none}
}
@media (max-width:900px){
  .nav-toggle{display:inline-flex}
  .header-top__line{display:none}
  .header-bottom__inner{justify-content:space-between;min-height:58px}
  .site-nav{
    position:absolute;
    left:0;
    right:0;
    top:100%;
    display:none;
    background:var(--night);
    border-top:2px solid var(--line);
    border-bottom:4px solid var(--neon);
    max-height:calc(100vh - 130px);
    overflow-y:auto;
    padding:6px var(--gutter) 22px;
    box-shadow:0 18px 40px rgba(3,7,16,.75);
  }
  .site-nav[data-open]{display:block}
  .site-nav__list{flex-direction:column;align-items:stretch;gap:0}
  .site-nav__item{display:block}
  .site-nav__link{
    width:100%;
    justify-content:flex-start;
    font-size:20px;
    padding:16px 0;
    border-bottom:1px solid var(--edge);
  }
  .site-nav__link::after{display:none}
  .site-nav__index{display:inline-block;font-size:12px}
  .site-nav__link[aria-current="page"]{
    color:var(--neon);
    padding-left:14px;
    border-left:4px solid var(--neon);
  }
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid--lab .span-4,
  .grid--lab .span-5,
  .grid--lab .span-7,
  .grid--lab .span-8{grid-column:1 / -1}
}
@media (max-width:700px){
  .header-cta{display:none}
  .header-top__clock{display:none}
  .grid--2,.grid--3,.grid--4{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .footer-band__tag{margin-left:0}
  .index-list__item{grid-template-columns:auto 1fr;gap:12px}
  .index-list__meta{grid-column:2}
  .exhibit{flex-wrap:wrap}
  .exhibit__meta{margin-left:0;width:100%}
}

/* ---------- 16. 可访问性偏好 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  [data-reveal]{opacity:1 !important;transform:none !important}
  .data-card:hover{transform:none}
  .btn:hover,.btn:focus-visible{transform:none}
  .to-top{transform:none}
}