/* ============================================================
   AT365 赛事数据 — /assets/site.css
   共享外壳：重置 / 变量 / 中文排版 / 页头 / 页脚 / 通用组件
   ============================================================ */

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

:root{
  --void:#0B0C0E;
  --carbon:#16181C;
  --slate:#23262C;
  --cream:#F4EDE1;
  --ink:#2A211B;
  --flare:#FF3B1F;
  --volt:#00E0A4;
  --copper:#C58B4A;
  --mist:#9BA1AC;
  --flag:#FFD23F;

  --line:rgba(244,237,225,.12);
  --shadow-hard:6px 6px 0 rgba(0,0,0,.78);
  --shadow-lift:8px 8px 0 rgba(0,0,0,.86);

  --font-display:"Archivo Black","Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"Noto Sans SC","Inter","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"IBM Plex Mono","JetBrains Mono","SFMono-Regular",Menlo,Consolas,"Courier New",monospace;

  --header-h:78px;
  --shell-w:1320px;
  --gutter:24px;
}

@media (max-width:1080px){ :root{ --header-h:70px; --gutter:20px; } }

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

body{
  margin:0;
  min-height:100%;
  background-color:var(--void);
  background-image:
    linear-gradient(rgba(244,237,225,.026) 1px,transparent 1px),
    linear-gradient(90deg,rgba(244,237,225,.026) 1px,transparent 1px);
  background-size:64px 64px;
  color:var(--mist);
  font-family:var(--font-body);
  font-size:16px;
  font-weight:400;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}

body.is-locked{overflow:hidden}

::selection{background:var(--flare);color:var(--void)}

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

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

/* ---------- 中文排版 ---------- */
h1,h2,h3,h4,h5{
  margin:0 0 .62em;
  font-family:var(--font-display);
  font-weight:900;
  color:var(--cream);
  line-height:1.08;
  letter-spacing:-.02em;
  text-wrap:balance;
}
h1{font-size:clamp(2.4rem,6vw,4.5rem);text-transform:uppercase}
h2{font-size:clamp(1.6rem,3.2vw,2.4rem);text-transform:uppercase;letter-spacing:-.015em}
h3{font-size:clamp(1.14rem,1.8vw,1.4rem);font-weight:800}
h4{font-size:1rem;font-weight:800;letter-spacing:0}

p{margin:0 0 1.1em}
p:last-child{margin-bottom:0}

a{color:var(--volt);text-decoration:none;transition:color .2s ease,border-color .2s ease}
a:hover{color:var(--cream)}

strong,b{color:var(--cream);font-weight:700}
em{font-style:normal;color:var(--copper)}

ul,ol{margin:0 0 1.1em}
li{margin-bottom:.4em}

hr{border:0;border-top:1px solid var(--line);margin:2.4em 0}

time{font-variant-numeric:tabular-nums}

.num,.mono{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-feature-settings:"tnum" 1;
}

/* ---------- 跳过链接 ---------- */
.skip-link{
  position:fixed;
  left:16px;
  top:-120px;
  z-index:400;
  padding:12px 20px;
  background:var(--flare);
  color:var(--void);
  font-weight:800;
  font-size:.86rem;
  letter-spacing:.06em;
  border:2px solid var(--void);
  box-shadow:var(--shadow-hard);
  transition:top .22s ease;
}
.skip-link:focus{top:12px;color:var(--void)}

/* ============================================================
   页头
   ============================================================ */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:100;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background .3s ease,border-color .3s ease,box-shadow .3s ease;
}
.site-header::after{
  content:"";
  position:absolute;
  inset:0;
  z-index:-1;
  background:linear-gradient(180deg,rgba(11,12,14,.92) 12%,rgba(11,12,14,0) 100%);
  transition:opacity .3s ease;
  pointer-events:none;
}
.site-header[data-scrolled]{
  background:var(--carbon);
  border-bottom-color:var(--slate);
  box-shadow:0 10px 30px rgba(0,0,0,.42);
}
.site-header[data-scrolled]::after{opacity:0}

.header-shell{
  position:relative;
  z-index:1;
  width:100%;
  max-width:var(--shell-w);
  margin:0 auto;
  padding:14px var(--gutter);
  display:flex;
  align-items:center;
  gap:26px;
}

/* ---------- 品牌 ---------- */
.brand{
  display:flex;
  align-items:center;
  gap:12px;
  flex:0 0 auto;
  color:inherit;
  text-decoration:none;
}
.brand:hover{color:inherit}
.brand__mark{
  flex:0 0 auto;
  width:40px;height:40px;
  display:grid;place-items:center;
  background:var(--carbon);
  border:2px solid var(--flare);
  box-shadow:3px 3px 0 rgba(255,59,31,.32);
  color:var(--flare);
}
.brand__mark svg{width:22px;height:22px;display:block}
.brand__text{display:block;min-width:0}
.brand__line{
  display:block;
  font-family:var(--font-display);
  font-size:1rem;
  font-weight:900;
  line-height:1.12;
  letter-spacing:-.01em;
  color:var(--cream);
  text-transform:uppercase;
  white-space:nowrap;
}
.brand__desc{
  display:block;
  margin-top:4px;
  font-family:var(--font-mono);
  font-size:.62rem;
  letter-spacing:.1em;
  text-transform:uppercase;
  color:var(--copper);
  white-space:nowrap;
}

/* ---------- 主导航 ---------- */
.site-nav{margin-left:auto}

.nav-list{
  display:flex;
  align-items:center;
  gap:2px;
  margin:0;
  padding:0;
  list-style:none;
}
.nav-list li{margin:0}
.nav-list a{
  display:block;
  padding:10px 13px;
  font-size:.84rem;
  font-weight:700;
  letter-spacing:.03em;
  color:rgba(244,237,225,.74);
  border:2px solid transparent;
  transition:color .2s ease,background .2s ease,border-color .2s ease;
}
.nav-list a:hover{color:var(--cream);background:rgba(35,38,44,.72);border-color:var(--slate)}
.nav-list a[aria-current="page"]{
  color:var(--void);
  background:var(--flare);
  border-color:var(--flare);
  box-shadow:3px 3px 0 rgba(0,0,0,.5);
}
.nav-list a[aria-current="page"]:hover{color:var(--void);background:var(--flare)}

.nav-group{display:none}

/* ---------- 页头工具区 ---------- */
.header-utility{
  display:flex;
  align-items:center;
  gap:16px;
  flex:0 0 auto;
}
.header-stamp{
  display:flex;
  flex-direction:column;
  gap:1px;
  margin:0;
  padding-left:16px;
  border-left:1px solid var(--slate);
}
.header-stamp__label{
  font-family:var(--font-mono);
  font-size:.58rem;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--copper);
}
.header-stamp__time{
  font-family:var(--font-mono);
  font-size:.74rem;
  letter-spacing:.02em;
  color:var(--mist);
  font-variant-numeric:tabular-nums;
  white-space:nowrap;
}

/* ---------- 移动端菜单按钮 ---------- */
.nav-toggle{
  position:relative;
  z-index:130;
  display:none;
  align-items:center;
  gap:9px;
  padding:10px 14px;
  background:var(--carbon);
  border:2px solid var(--slate);
  color:var(--cream);
  font-family:var(--font-mono);
  font-size:.66rem;
  letter-spacing:.14em;
  text-transform:uppercase;
  cursor:pointer;
  transition:border-color .2s ease,color .2s ease;
}
.nav-toggle:hover{border-color:var(--copper)}
.nav-toggle__bars{
  position:relative;
  display:block;
  width:18px;
  height:2px;
  background:currentColor;
  transition:background .2s ease;
}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";
  position:absolute;
  left:0;
  width:18px;
  height:2px;
  background:currentColor;
  transition:transform .22s ease;
}
.nav-toggle__bars::before{top:-6px}
.nav-toggle__bars::after{top:6px}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars{background:transparent}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{transform:translateY(-6px) rotate(-45deg)}

/* ============================================================
   页脚
   ============================================================ */
.site-footer{
  position:relative;
  margin-top:96px;
  background:var(--void);
  border-top:6px solid var(--flare);
  color:var(--mist);
}
.site-footer::before{
  content:"";
  position:absolute;
  top:-6px;left:0;right:0;
  height:6px;
  background:repeating-linear-gradient(90deg,
    var(--flare) 0 56px,
    var(--copper) 56px 72px,
    var(--volt) 72px 88px,
    var(--slate) 88px 112px);
  pointer-events:none;
}

.footer-shell{
  width:100%;
  max-width:var(--shell-w);
  margin:0 auto;
  padding:64px var(--gutter) 34px;
}

.footer-masthead{
  display:grid;
  gap:14px;
  padding-bottom:30px;
  border-bottom:1px solid var(--slate);
}
.footer-masthead .brand__line{font-size:1.1rem}
.footer-note{
  margin:0;
  max-width:62ch;
  font-size:.92rem;
  color:var(--mist);
}
.footer-note--inline{
  font-size:.8rem;
  color:var(--copper);
  line-height:1.6;
}
.footer-stamp{
  margin:0;
  font-family:var(--font-mono);
  font-size:.68rem;
  letter-spacing:.1em;
  text-transform:uppercase;
  color:var(--copper);
}
.footer-stamp time{color:var(--volt)}

.footer-grid{
  display:grid;
  grid-template-columns:minmax(170px,.86fr) minmax(150px,.76fr) minmax(280px,1.5fr) minmax(150px,.7fr);
  gap:42px 32px;
  padding:42px 0 34px;
}

.footer-col{min-width:0}
.footer-col + .footer-col{border-left:1px solid var(--slate);padding-left:32px}

.footer-col__title{
  margin:0 0 16px;
  font-family:var(--font-mono);
  font-size:.66rem;
  font-weight:700;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--cream);
}

.footer-list{
  margin:0;
  padding:0;
  list-style:none;
}
.footer-list li{
  margin:0 0 9px;
  font-size:.86rem;
  line-height:1.55;
}
.footer-list li:last-child{margin-bottom:0}
.footer-list a{
  color:var(--mist);
  border-bottom:1px solid transparent;
}
.footer-list a:hover{color:var(--volt);border-bottom-color:var(--volt)}
.footer-list--plain li{color:rgba(155,161,172,.82)}

.footer-list--contact li{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  gap:5px 10px;
  margin-bottom:14px;
}
.footer-list--contact li:last-child{margin-bottom:0}
.footer-k{
  flex:0 0 auto;
  min-width:34px;
  font-family:var(--font-mono);
  font-size:.6rem;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--copper);
}
.footer-v{
  flex:1 1 auto;
  min-width:0;
  color:var(--cream);
  font-size:.86rem;
  word-break:break-all;
}

.copy-chip{
  flex:0 0 auto;
  padding:4px 9px;
  background:transparent;
  border:1px solid var(--slate);
  color:var(--copper);
  font-family:var(--font-mono);
  font-size:.6rem;
  letter-spacing:.12em;
  text-transform:uppercase;
  cursor:pointer;
  transition:border-color .2s ease,color .2s ease,background .2s ease;
}
.copy-chip:hover{border-color:var(--copper);color:var(--cream);background:var(--slate)}
.copy-chip[data-copied]{border-color:var(--volt);color:var(--volt);background:rgba(0,224,164,.08)}

.footer-base{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:12px 22px;
  padding-top:24px;
  border-top:1px solid var(--slate);
}
.footer-legal{
  margin:0;
  font-family:var(--font-mono);
  font-size:.68rem;
  letter-spacing:.08em;
  color:var(--mist);
}
.footer-copy{
  margin:0;
  font-family:var(--font-mono);
  font-size:.68rem;
  letter-spacing:.08em;
  color:var(--copper);
}
.footer-base .copy-chip{margin-left:auto}

/* ============================================================
   通用布局与组件
   ============================================================ */
#main-content{padding-top:var(--header-h)}

.container{
  width:100%;
  max-width:var(--shell-w);
  margin:0 auto;
  padding:0 var(--gutter);
}
.container--narrow{max-width:820px}
.container--wide{max-width:1520px}

.stack{display:flex;flex-direction:column;gap:18px}
.cluster{display:flex;flex-wrap:wrap;align-items:center;gap:12px}

.grid-12{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:24px;
}
.grid-12 > [class*="col-"]{grid-column:span 12}

@media (min-width:760px){
  .grid-12 > .col-3{grid-column:span 6}
  .grid-12 > .col-4{grid-column:span 6}
  .grid-12 > .col-5{grid-column:span 7}
  .grid-12 > .col-6{grid-column:span 6}
  .grid-12 > .col-7{grid-column:span 7}
  .grid-12 > .col-8{grid-column:span 8}
  .grid-12 > .col-9{grid-column:span 9}
}
@media (min-width:1080px){
  .grid-12 > .col-3{grid-column:span 3}
  .grid-12 > .col-4{grid-column:span 4}
  .grid-12 > .col-5{grid-column:span 5}
  .grid-12 > .col-6{grid-column:span 6}
  .grid-12 > .col-7{grid-column:span 7}
  .grid-12 > .col-8{grid-column:span 8}
  .grid-12 > .col-9{grid-column:span 9}
}

/* ---------- 面包屑 ---------- */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:0;
  margin:0 0 22px;
  padding:0;
  list-style:none;
  font-family:var(--font-mono);
  font-size:.68rem;
  letter-spacing:.1em;
  text-transform:uppercase;
}
.breadcrumb li{
  margin:0;
  display:flex;
  align-items:center;
  color:var(--mist);
}
.breadcrumb li::after{
  content:"/";
  margin:0 10px;
  color:var(--slate);
}
.breadcrumb li:last-child::after{content:none;margin:0}
.breadcrumb a{color:var(--copper)}
.breadcrumb a:hover{color:var(--volt)}
.breadcrumb [aria-current="page"]{color:var(--cream)}

/* ---------- 标签与提示 ---------- */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:3px 9px;
  border:1px solid var(--slate);
  font-family:var(--font-mono);
  font-size:.62rem;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--mist);
  background:rgba(35,38,44,.6);
}
.tag--flare{border-color:var(--flare);color:var(--flare);background:rgba(255,59,31,.09)}
.tag--volt{border-color:var(--volt);color:var(--volt);background:rgba(0,224,164,.09)}
.tag--flag{border-color:var(--flag);color:var(--flag);background:rgba(255,210,63,.1)}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:9px;
  margin:0 0 10px;
  font-family:var(--font-mono);
  font-size:.66rem;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--copper);
}
.eyebrow::before{
  content:"";
  width:20px;
  height:2px;
  background:var(--flare);
  flex:0 0 auto;
}

.section-head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:14px;
  margin-bottom:26px;
  padding-bottom:14px;
  border-bottom:2px solid var(--slate);
}
.section-head > *{margin-bottom:0}

/* ---------- 面板 ---------- */
.panel{
  background:var(--carbon);
  border:2px solid var(--slate);
  padding:22px 24px;
  box-shadow:var(--shadow-hard);
}
.panel--cream{background:var(--cream);border-color:var(--ink);color:var(--ink)}

.surface-cream{background:var(--cream);color:var(--ink)}
.surface-cream h1,
.surface-cream h2,
.surface-cream h3,
.surface-cream h4{color:var(--ink)}
.surface-cream strong{color:var(--ink)}
.surface-cream a{color:#A82A12}
.surface-cream a:hover{color:#7A1D0B}
.surface-cream .prose{color:#43362D}

/* ---------- 专题研究板 ---------- */
.research-card{
  position:relative;
  display:flex;
  flex-direction:column;
  gap:14px;
  padding:20px 22px 22px;
  background:var(--carbon);
  border:2px solid var(--slate);
  box-shadow:var(--shadow-hard);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.research-card:hover{
  transform:translate(-2px,-2px);
  border-color:var(--copper);
  box-shadow:var(--shadow-lift);
}
.research-card__summary{
  margin:0;
  font-family:var(--font-display);
  font-size:1.06rem;
  font-weight:800;
  line-height:1.35;
  color:var(--cream);
  letter-spacing:-.01em;
}
.research-card__evidence{
  display:flex;
  flex-wrap:wrap;
  gap:16px 26px;
  padding:14px 0;
  border-top:1px solid var(--slate);
  border-bottom:1px solid var(--slate);
}
.research-card__note{
  margin:0;
  font-family:var(--font-mono);
  font-size:.68rem;
  letter-spacing:.08em;
  text-transform:uppercase;
  color:var(--copper);
  line-height:1.7;
}
.research-card__more{
  margin-top:auto;
  font-family:var(--font-mono);
  font-size:.68rem;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--volt);
}
.research-card__more::after{content:" →"}

/* ---------- 指标 ---------- */
.stat{display:flex;flex-direction:column;gap:5px;min-width:0}
.stat__value{
  font-family:var(--font-mono);
  font-size:clamp(1.45rem,3vw,2.05rem);
  font-weight:700;
  line-height:1;
  color:var(--cream);
  font-variant-numeric:tabular-nums;
}
.stat__value--flare{color:var(--flare)}
.stat__value--volt{color:var(--volt)}
.stat__label{
  font-family:var(--font-mono);
  font-size:.62rem;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--mist);
}

/* ---------- 数据表 ---------- */
.data-table{
  width:100%;
  border-collapse:collapse;
  font-size:.86rem;
  color:var(--mist);
}
.data-table caption{
  caption-side:top;
  text-align:left;
  padding:0 0 12px;
  font-family:var(--font-mono);
  font-size:.64rem;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--copper);
}
.data-table th,
.data-table td{
  padding:11px 13px;
  text-align:left;
  border-bottom:1px solid var(--slate);
  vertical-align:top;
}
.data-table thead th{
  background:var(--slate);
  color:var(--copper);
  font-family:var(--font-mono);
  font-size:.64rem;
  font-weight:700;
  letter-spacing:.12em;
  text-transform:uppercase;
  white-space:nowrap;
}
.data-table tbody tr:nth-child(even){background:rgba(35,38,44,.55)}
.data-table tbody tr:hover{background:rgba(197,139,74,.1)}
.data-table td.num,
.data-table th.num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  text-align:right;
  color:var(--cream);
}
.data-table td.num--flare{color:var(--flare)}
.data-table td.num--volt{color:var(--volt)}

/* ---------- 图片容器（页面阶段放置素材） ---------- */
.figure-frame{
  position:relative;
  display:block;
  overflow:hidden;
  aspect-ratio:16/10;
  background:
    linear-gradient(135deg,var(--carbon) 0%,var(--slate) 100%);
  border:2px solid var(--slate);
  box-shadow:var(--shadow-hard);
}
.figure-frame::after{
  content:"";
  position:absolute;
  inset:10px;
  border:1px dashed rgba(244,237,225,.12);
  pointer-events:none;
}
.figure-frame img,
.figure-frame svg,
.figure-frame__media{
  display:block;
  width:100%;
  height:100%;
  object-fit:cover;
}
.figure-frame--hot{aspect-ratio:4/3}
.figure-frame--tall{aspect-ratio:3/4}
.figure-frame--wide{aspect-ratio:21/9}
.figure-frame__cap{
  position:absolute;
  left:0;right:0;bottom:0;
  padding:9px 13px;
  background:rgba(11,12,14,.88);
  border-top:1px solid var(--slate);
  font-family:var(--font-mono);
  font-size:.62rem;
  letter-spacing:.1em;
  text-transform:uppercase;
  color:var(--mist);
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:11px 20px;
  border:2px solid transparent;
  background:transparent;
  font-family:var(--font-body);
  font-size:.84rem;
  font-weight:700;
  letter-spacing:.06em;
  line-height:1.2;
  cursor:pointer;
  text-decoration:none;
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease,color .2s ease,border-color .2s ease;
}
.btn--solid{
  background:var(--flare);
  border-color:var(--flare);
  color:var(--void);
  box-shadow:4px 4px 0 rgba(0,0,0,.6);
}
.btn--solid:hover{
  color:var(--void);
  transform:translate(-1px,-1px);
  box-shadow:6px 6px 0 rgba(0,0,0,.68);
}
.btn--ghost{
  border-color:var(--slate);
  color:var(--cream);
}
.btn--ghost:hover{
  border-color:var(--copper);
  color:var(--cream);
  background:var(--slate);
}
.btn--volt{
  border-color:var(--volt);
  color:var(--volt);
}
.btn--volt:hover{
  background:var(--volt);
  color:var(--void);
}

/* ---------- 长文阅读 ---------- */
.prose{
  max-width:68ch;
  font-size:1rem;
  line-height:1.85;
  color:var(--mist);
}
.prose h2{margin-top:2.1em}
.prose h3{margin-top:1.7em}
.prose ul,.prose ol{padding-left:1.15em}
.prose li{margin-bottom:.5em}
.prose blockquote{
  margin:1.8em 0;
  padding:16px 20px;
  border-left:3px solid var(--flare);
  background:rgba(35,38,44,.6);
  color:var(--cream);
}

.divider{
  height:2px;
  border:0;
  margin:34px 0;
  background:repeating-linear-gradient(90deg,var(--slate) 0 14px,transparent 14px 22px);
}

/* ---------- 滚动进度 ---------- */
.scroll-progress{
  position:fixed;
  top:0;left:0;
  width:100%;
  height:3px;
  transform:scaleX(0);
  transform-origin:0 50%;
  background:linear-gradient(90deg,var(--flare) 0%,var(--copper) 52%,var(--volt) 100%);
  z-index:300;
  pointer-events:none;
}

/* ---------- 显现动效 ---------- */
html.has-reveal [data-reveal]{
  opacity:0;
  transform:translateY(16px);
  transition:opacity .38s ease-out,transform .38s ease-out;
  will-change:opacity,transform;
}
html.has-reveal [data-reveal].is-visible{
  opacity:1;
  transform:none;
}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width:1180px){
  .nav-list a{padding:9px 9px;font-size:.78rem}
  .header-stamp{display:none}
  .header-cta{padding:9px 14px;font-size:.78rem}
}

@media (max-width:1080px){
  .site-header{
    background:var(--carbon);
    border-bottom:1px solid var(--slate);
  }
  .site-header::after{opacity:0}

  .header-shell{gap:14px;padding:12px var(--gutter)}
  .brand__mark{width:36px;height:36px}
  .brand__desc{display:none}
  .brand__line{font-size:.94rem}

  .nav-toggle{display:inline-flex;margin-left:auto}

  .site-nav{
    position:fixed;
    top:0;right:0;bottom:0;
    width:min(420px,88vw);
    margin:0;
    padding:calc(var(--header-h) + 18px) 24px 40px;
    background:var(--carbon);
    border-left:3px solid var(--flare);
    box-shadow:-24px 0 60px rgba(0,0,0,.68);
    overflow-y:auto;
    overscroll-behavior:contain;
    transform:translateX(101%);
    transition:transform .3s cubic-bezier(.22,.8,.2,1);
    z-index:120;
  }
  .site-nav[data-open]{transform:translateX(0)}

  .nav-list{
    display:block;
    width:100%;
  }
  .nav-list li{margin:0}
  .nav-list a{
    padding:13px 14px;
    font-size:.94rem;
    border:0;
    border-bottom:1px solid var(--slate);
    color:var(--cream);
  }
  .nav-list a:hover{background:var(--slate);border-color:var(--slate)}
  .nav-list a[aria-current="page"]{
    background:var(--flare);
    color:var(--void);
    box-shadow:none;
  }

  .nav-group{
    display:block;
    margin:22px 0 8px;
    padding-left:14px;
    font-family:var(--font-mono);
    font-size:.62rem;
    letter-spacing:.2em;
    text-transform:uppercase;
    color:var(--copper);
  }
  .nav-group:first-child{margin-top:0}

  .header-cta{display:none}

  .footer-grid{
    grid-template-columns:repeat(2,minmax(0,1fr));
    gap:34px 26px;
  }
  .footer-col + .footer-col{border-left:0;padding-left:0}
  .footer-col--contact{grid-column:1 / -1}
}

@media (max-width:640px){
  h1{font-size:clamp(2rem,9vw,2.8rem)}
  .site-footer{margin-top:66px}
  .footer-shell{padding:48px var(--gutter) 28px}
  .footer-grid{grid-template-columns:1fr;gap:30px}
  .footer-col--contact{grid-column:auto}
  .footer-base{flex-direction:column;align-items:flex-start;gap:10px}
  .footer-base .copy-chip{margin-left:0}
  .grid-12{gap:18px}
  .data-table{display:block;overflow-x:auto;white-space:nowrap}
}

/* ---------- 无障碍与动效降级 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
  }
  html.has-reveal [data-reveal]{
    opacity:1 !important;
    transform:none !important;
  }
  .research-card:hover{transform:none}
  .btn:hover{transform:none}
}