/* =========================================================
   HYTY 幻影体育 · 共享样式 /assets/site.css
   深夜球场霓虹：炭黑场地 + 幻影紫 + 电光青 + 荧光黄
   ========================================================= */

/* ---------- 1. 设计变量 ---------- */
:root{
  --ink:#0B0E14;
  --panel:#1B2233;
  --deep:#121726;
  --violet:#6C2BD9;
  --cyan:#00E5FF;
  --yellow:#FFE500;
  --paper:#E8E4DA;
  --stone:#8C93A8;
  --clay:#C9643F;
  --moss:#4E6B52;
  --neon:linear-gradient(120deg,#6C2BD9 0%,#00E5FF 100%);
  --line:rgba(140,147,168,.22);
  --line-soft:rgba(140,147,168,.12);
  --cut:18px;
  --shell:1400px;
  --gap:24px;
  --gutter:24px;
  --font-display:"Archivo Black","Source Han Sans SC","Noto Sans SC",system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;
  --font-body:"Source Han Sans SC","Noto Sans SC",system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,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:110px}
body,h1,h2,h3,h4,h5,p,figure,blockquote,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
a{color:inherit;background:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
table{border-collapse:collapse;width:100%}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px}
::selection{background:var(--violet);color:var(--paper)}

/* ---------- 3. 基础排版 ---------- */
body{
  min-height:100%;
  background-color:var(--ink);
  background-image:
    radial-gradient(circle at 12% -4%,rgba(108,43,217,.24),transparent 46%),
    radial-gradient(circle at 92% 6%,rgba(0,229,255,.13),transparent 42%),
    radial-gradient(circle at 50% 120%,rgba(108,43,217,.18),transparent 55%);
  color:var(--paper);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::after{
  content:"";
  position:fixed;
  inset:0;
  z-index:1;
  pointer-events:none;
  opacity:.05;
  background-image:repeating-linear-gradient(0deg,rgba(232,228,218,.9) 0 1px,transparent 1px 4px);
}
#main-content{display:block;position:relative;z-index:2}

h1,h2,h3,h4{font-family:var(--font-display);font-weight:900;line-height:1.05;letter-spacing:-.005em}
p{max-width:100%}
strong{color:var(--yellow);font-weight:700}
code,kbd{font-family:var(--font-mono);font-size:.9em;color:var(--cyan)}

/* ---------- 4. 跳转链接 ---------- */
.skip-link{
  position:fixed;
  left:16px;
  top:-80px;
  z-index:300;
  padding:12px 20px;
  background:var(--yellow);
  color:var(--ink);
  font-size:13px;
  font-weight:700;
  letter-spacing:.1em;
  text-decoration:none;
  clip-path:polygon(12px 0,100% 0,100% calc(100% - 12px),calc(100% - 12px) 100%,0 100%,0 12px);
  transition:top .22s ease;
}
.skip-link:focus{top:16px}

/* ---------- 5. 版心与栅格 ---------- */
.container{width:100%;max-width:var(--shell);margin:0 auto;padding:0 var(--gutter)}
.container--narrow{max-width:820px}
.container--wide{max-width:none;padding:0}
.grid{display:grid;gap:var(--gap)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--12{grid-template-columns:repeat(12,minmax(0,1fr))}
.col-4{grid-column:span 4}
.col-6{grid-column:span 6}
.col-8{grid-column:span 8}
.col-12{grid-column:span 12}

/* ---------- 6. 章节与文字层 ---------- */
.section{position:relative;padding:clamp(56px,8vw,124px) 0}
.section--deep{background:var(--deep)}
.section--panel{background:var(--panel)}
.section--paper{background:var(--paper);color:#141A26}
.section--paper .eyebrow{color:#5C6379}
.section--paper .lede,.section--paper .prose{color:#3A4152}
.section__head{display:grid;gap:16px;max-width:58ch;margin-bottom:clamp(28px,4vw,52px)}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:12px;
  font-weight:500;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--stone);
}
.eyebrow::before{
  content:"";
  width:26px;
  height:3px;
  background:var(--neon);
  transform:skewY(-14deg);
  flex:0 0 auto;
}
.display{
  font-family:var(--font-display);
  font-weight:900;
  line-height:.92;
  letter-spacing:-.015em;
  text-transform:uppercase;
  color:var(--paper);
}
.display--xl{font-size:clamp(56px,11vw,168px)}
.display--lg{font-size:clamp(34px,5.2vw,64px)}
.display--skew{display:inline-block;transform:skewX(-6deg)}
.lede{font-size:clamp(17px,1.6vw,20px);line-height:1.8;color:rgba(232,228,218,.82);max-width:34em}
.prose{font-size:17px;line-height:1.85;color:rgba(232,228,218,.86);max-width:34em}
.prose + .prose{margin-top:1.1em}
.slant-band{
  height:6px;
  border:0;
  margin:0;
  background:var(--neon);
  transform:rotate(-1.2deg);
  transform-origin:left center;
  clip-path:polygon(0 0,100% 0,100% 100%,0 100%);
}

/* ---------- 7. 页头 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:90;
  background:rgba(11,14,20,.92);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line-soft);
  transition:box-shadow .25s ease,background .25s ease;
}
.site-header[data-scrolled]{box-shadow:0 14px 40px rgba(0,0,0,.5)}
.header-shell{
  width:100%;
  max-width:var(--shell);
  margin:0 auto;
  padding:14px var(--gutter);
  display:flex;
  align-items:center;
  gap:18px;
  min-height:78px;
}

.brand{
  position:relative;
  z-index:95;
  flex:0 0 auto;
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding-left:18px;
  text-decoration:none;
}
.brand::before{
  content:"";
  position:absolute;
  left:0;
  top:50%;
  width:6px;
  height:30px;
  margin-top:-15px;
  background:var(--neon);
  transform:skewY(-12deg);
}
.brand__mark{
  font-family:var(--font-display);
  font-size:23px;
  font-weight:900;
  letter-spacing:.02em;
  color:var(--paper);
  display:inline-block;
  transform:skewX(-8deg);
}
.brand__name{
  font-size:15px;
  font-weight:700;
  letter-spacing:.14em;
  color:var(--paper);
}
.brand__tagline{
  font-size:11px;
  letter-spacing:.2em;
  color:var(--stone);
  padding-left:10px;
  border-left:1px solid var(--line);
}

.header-utility{
  margin-left:auto;
  display:flex;
  align-items:center;
  gap:8px;
  font-size:11px;
  letter-spacing:.16em;
  color:var(--stone);
  white-space:nowrap;
}
.header-utility__label{color:rgba(140,147,168,.7)}
.header-utility__link{
  color:var(--stone);
  text-decoration:none;
  padding:4px 2px;
  border-bottom:1px solid transparent;
  transition:color .2s ease,border-color .2s ease;
}
.header-utility__link:hover{color:var(--cyan);border-bottom-color:var(--cyan)}
.header-utility__sep{color:rgba(140,147,168,.45)}

.nav-toggle{
  position:relative;
  z-index:96;
  display:none;
  align-items:center;
  gap:9px;
  padding:10px 14px;
  color:var(--paper);
  font-size:12px;
  letter-spacing:.16em;
  background:rgba(27,34,51,.7);
  box-shadow:inset 0 0 0 1px rgba(0,229,255,.35);
  clip-path:polygon(10px 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%,0 10px);
  transition:box-shadow .2s ease,color .2s ease;
}
.nav-toggle:hover{color:var(--cyan);box-shadow:inset 0 0 0 1px var(--cyan)}
.nav-toggle__bars{display:inline-flex;flex-direction:column;gap:4px;width:20px}
.nav-toggle__bars i{display:block;height:2px;width:100%;background:currentColor;transition:transform .25s ease,opacity .2s ease}
.nav-toggle__bars i:nth-child(2){width:70%}

.site-nav{display:flex;align-items:center}
.site-nav__list{display:flex;align-items:center;gap:2px}
.site-nav__item{display:block}
.site-nav__link{
  display:inline-flex;
  align-items:baseline;
  gap:6px;
  padding:8px 11px;
  font-size:13px;
  letter-spacing:.14em;
  color:var(--stone);
  text-decoration:none;
  border-bottom:2px solid transparent;
  transition:color .2s ease,border-color .2s ease,background .2s ease;
}
.site-nav__index{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.08em;
  color:rgba(140,147,168,.65);
  transition:color .2s ease;
}
.site-nav__link:hover{color:var(--paper);background:rgba(108,43,217,.16)}
.site-nav__link:hover .site-nav__index{color:var(--cyan)}
.site-nav__link[aria-current="page"]{
  color:var(--yellow);
  border-bottom-color:var(--violet);
}
.site-nav__link[aria-current="page"] .site-nav__index{color:var(--cyan)}
.site-nav__foot{display:none}
.site-nav__cta{width:100%;justify-content:center}

.header-progress{
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  height:3px;
  background:rgba(140,147,168,.16);
}
.header-progress__bar{
  display:block;
  height:100%;
  width:0;
  background:var(--neon);
  transition:width .1s linear;
}

/* ---------- 8. 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(64px,9vw,120px);
  padding:clamp(52px,6vw,84px) 0 40px;
  background:var(--deep);
  color:var(--stone);
  overflow:hidden;
}
.site-footer::before{
  content:"";
  position:absolute;
  top:0;
  left:-4%;
  width:108%;
  height:4px;
  background:var(--neon);
  transform:rotate(-1.2deg);
  transform-origin:left center;
}
.site-footer::after{
  content:"";
  position:absolute;
  top:-190px;
  right:-150px;
  width:540px;
  height:540px;
  pointer-events:none;
  background:radial-gradient(circle,rgba(108,43,217,.36),transparent 68%);
}
.footer-shell{
  position:relative;
  z-index:1;
  width:100%;
  max-width:var(--shell);
  margin:0 auto;
  padding:0 var(--gutter);
}
.footer-top{
  display:grid;
  grid-template-columns:minmax(230px,1fr) 2.7fr;
  gap:clamp(28px,4vw,64px);
  padding-bottom:40px;
  border-bottom:1px solid var(--line-soft);
}
.footer-brand__mark{
  font-family:var(--font-display);
  font-size:24px;
  font-weight:900;
  letter-spacing:.02em;
  color:var(--paper);
  display:inline-block;
  transform:skewX(-6deg);
}
.footer-brand__tagline{
  margin-top:12px;
  font-size:12px;
  letter-spacing:.22em;
  color:var(--cyan);
}
.footer-brand__note{
  margin-top:18px;
  max-width:26em;
  font-size:13.5px;
  line-height:1.9;
  color:rgba(140,147,168,.92);
}
.footer-grid{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:28px;
}
.footer-col__title{
  position:relative;
  padding-bottom:10px;
  margin-bottom:16px;
  font-family:var(--font-body);
  font-size:12px;
  font-weight:700;
  letter-spacing:.2em;
  color:var(--paper);
  border-bottom:1px solid var(--line-soft);
}
.footer-col__title::after{
  content:"";
  position:absolute;
  left:0;
  bottom:-1px;
  width:34px;
  height:2px;
  background:var(--neon);
}
.footer-col__list{display:grid;gap:10px}
.footer-col__link{
  display:inline-block;
  font-size:13.5px;
  color:var(--stone);
  text-decoration:none;
  transition:color .2s ease,transform .2s ease;
}
.footer-col__link:hover{color:var(--cyan);transform:translateX(3px)}
.footer-meta{
  display:grid;
  gap:10px;
  padding-top:26px;
  font-size:12.5px;
  line-height:1.9;
}
.footer-meta__legal{
  font-family:var(--font-mono);
  letter-spacing:.03em;
  color:rgba(232,228,218,.75);
}
.footer-meta__contact{color:var(--stone)}
.footer-meta__response{color:rgba(140,147,168,.72);letter-spacing:.05em}

/* ---------- 9. 通用组件 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:14px 26px;
  font-size:13.5px;
  font-weight:700;
  letter-spacing:.14em;
  text-decoration:none;
  color:var(--ink);
  background:var(--yellow);
  clip-path:polygon(var(--cut) 0,100% 0,100% calc(100% - var(--cut)),calc(100% - var(--cut)) 100%,0 100%,0 var(--cut));
  transition:transform .22s ease,box-shadow .22s ease,background .22s ease,color .22s ease;
}
.btn:hover{transform:translate(3px,-3px);box-shadow:0 12px 28px rgba(108,43,217,.4)}
.btn--neon{background:var(--neon);color:var(--ink)}
.btn--ghost{
  background:transparent;
  color:var(--paper);
  box-shadow:inset 0 0 0 1px rgba(0,229,255,.55);
}
.btn--ghost:hover{color:var(--cyan);box-shadow:inset 0 0 0 1px var(--cyan),0 12px 26px rgba(0,229,255,.18)}
.btn--block{display:flex;width:100%;justify-content:center}

.cut-panel{
  position:relative;
  padding:clamp(22px,3vw,34px);
  background:var(--panel);
  box-shadow:inset 0 0 0 1px var(--line-soft);
  clip-path:polygon(var(--cut) 0,100% 0,100% calc(100% - var(--cut)),calc(100% - var(--cut)) 100%,0 100%,0 var(--cut));
}
.cut-panel--tilt{transform:rotate(-.6deg)}

.card{
  position:relative;
  display:flex;
  flex-direction:column;
  gap:12px;
  padding:clamp(20px,2.4vw,28px);
  background:var(--panel);
  box-shadow:inset 0 0 0 1px var(--line-soft);
  clip-path:polygon(var(--cut) 0,100% 0,100% calc(100% - var(--cut)),calc(100% - var(--cut)) 100%,0 100%,0 var(--cut));
  transition:transform .26s ease,box-shadow .26s ease;
}
.card:hover{
  transform:translate(4px,-4px);
  box-shadow:inset 0 0 0 1px rgba(0,229,255,.6),0 18px 40px rgba(0,0,0,.45);
}
.card__meta{
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.14em;
  color:var(--cyan);
}
.card__title{
  font-family:var(--font-display);
  font-size:clamp(20px,2.2vw,28px);
  font-weight:900;
  line-height:1.15;
  color:var(--paper);
  transition:color .2s ease;
}
.card:hover .card__title{color:var(--yellow)}
.card__body{font-size:15px;line-height:1.8;color:rgba(232,228,218,.78);max-width:34em}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 11px;
  font-size:11px;
  font-weight:700;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--ink);
  background:var(--cyan);
  clip-path:polygon(8px 0,100% 0,100% calc(100% - 8px),calc(100% - 8px) 100%,0 100%,0 8px);
}
.tag--clay{background:var(--clay);color:var(--paper)}
.tag--moss{background:var(--moss);color:var(--paper)}
.tag--violet{background:var(--violet);color:var(--paper)}
.tag--cyan{background:var(--cyan);color:var(--ink)}

.stat-row{
  display:flex;
  flex-wrap:wrap;
  gap:clamp(20px,3vw,48px);
}
.stat{display:flex;flex-direction:column;gap:6px}
.stat__value{
  font-family:var(--font-mono);
  font-size:clamp(30px,4.4vw,58px);
  line-height:1;
  letter-spacing:-.02em;
  color:var(--yellow);
}
.stat__label{
  font-size:11px;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--stone);
}

.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  padding:0;
  margin:0;
  font-size:12px;
  letter-spacing:.12em;
  color:var(--stone);
}
.breadcrumb__item{display:inline-flex;align-items:center;gap:8px}
.breadcrumb__item + .breadcrumb__item::before{content:"/";color:rgba(140,147,168,.45)}
.breadcrumb__link{color:var(--stone);text-decoration:none;transition:color .2s ease}
.breadcrumb__link:hover{color:var(--cyan)}
.breadcrumb__current{color:var(--paper)}

.tabs{display:grid;gap:24px}
.tabs__list{
  display:flex;
  flex-wrap:wrap;
  gap:6px;
  border-bottom:1px solid var(--line);
}
.tabs__btn{
  padding:10px 16px;
  font-size:12.5px;
  letter-spacing:.14em;
  color:var(--stone);
  border-bottom:2px solid transparent;
  transition:color .2s ease,border-color .2s ease,background .2s ease;
}
.tabs__btn:hover{color:var(--paper);background:rgba(108,43,217,.16)}
.tabs__btn[aria-selected="true"]{color:var(--yellow);border-bottom-color:var(--violet)}
.tabs__panel{display:none}
.tabs__panel[data-active]{display:block;animation:tabIn .34s ease both}
@keyframes tabIn{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}

.media{
  position:relative;
  display:block;
  overflow:hidden;
  background:linear-gradient(150deg,var(--panel),var(--deep));
  clip-path:polygon(var(--cut) 0,100% 0,100% calc(100% - var(--cut)),calc(100% - var(--cut)) 100%,0 100%,0 var(--cut));
}
.media--16x9{aspect-ratio:16/9}
.media--4x5{aspect-ratio:4/5}
.media--21x9{aspect-ratio:21/9}
.media--square{aspect-ratio:1/1}
.media__img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.media:hover .media__img{transform:scale(1.02)}
.media__ph{
  position:absolute;
  inset:0;
  display:flex;
  align-items:center;
  justify-content:center;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.24em;
  color:rgba(140,147,168,.85);
  background-image:repeating-linear-gradient(135deg,rgba(140,147,168,.09) 0 10px,transparent 10px 22px);
}
.media--neon::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  opacity:.55;
  mix-blend-mode:screen;
  background:linear-gradient(120deg,rgba(108,43,217,.6),rgba(0,229,255,.28));
}
.media__cap{
  position:absolute;
  left:14px;
  bottom:12px;
  z-index:2;
  font-size:11px;
  letter-spacing:.18em;
  color:var(--paper);
  text-shadow:0 2px 10px rgba(0,0,0,.7);
}
.media--bleed{margin-inline:calc(var(--gutter) * -1);clip-path:none}

.path-list{display:grid;gap:12px}
.path-list__item{
  display:flex;
  gap:14px;
  align-items:flex-start;
  padding:14px 18px;
  background:rgba(27,34,51,.7);
  box-shadow:inset 0 0 0 1px var(--line-soft);
  clip-path:polygon(12px 0,100% 0,100% calc(100% - 12px),calc(100% - 12px) 100%,0 100%,0 12px);
}
.path-list__index{
  font-family:var(--font-mono);
  font-size:13px;
  color:var(--cyan);
  flex:0 0 auto;
}
.path-list__text{font-size:15px;line-height:1.75;color:rgba(232,228,218,.86)}

/* ---------- 10. 动效钩子 ---------- */
.reveal{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .55s ease,transform .55s ease;
}
.reveal.is-visible{opacity:1;transform:none}

.scroll-rail{
  position:fixed;
  left:24px;
  top:50%;
  z-index:50;
  transform:translateY(-50%);
  display:none;
}
.scroll-rail__list{display:flex;flex-direction:column;gap:14px}
.scroll-rail__item{display:block}
.scroll-rail__link{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:11px;
  letter-spacing:.16em;
  color:var(--stone);
  text-decoration:none;
  transition:color .2s ease;
}
.scroll-rail__dot{
  width:18px;
  height:2px;
  background:rgba(140,147,168,.45);
  transform:skewY(-14deg);
  transition:width .25s ease,background .25s ease;
}
.scroll-rail__link:hover{color:var(--paper)}
.scroll-rail__link.is-active{color:var(--paper)}
.scroll-rail__link.is-active .scroll-rail__dot{width:32px;background:var(--neon)}

/* ---------- 11. 响应式 ---------- */
@media (min-width:1200px){
  .scroll-rail{display:block}
  .media--bleed{margin-inline:-48px}
}

@media (max-width:1024px){
  .nav-toggle{display:inline-flex}
  .header-utility{display:none}
  .brand__tagline{display:none}
  .header-shell{min-height:68px;padding:12px var(--gutter)}

  .site-nav{
    position:fixed;
    inset:0;
    z-index:80;
    display:flex;
    flex-direction:column;
    justify-content:center;
    gap:28px;
    padding:110px 28px 64px;
    background:linear-gradient(155deg,#0B0E14 0%,#121726 52%,#1B2233 100%);
    clip-path:polygon(0 0,100% 0,100% calc(100% - 56px),0 100%);
    transform:translateY(-101%);
    visibility:hidden;
    overflow-y:auto;
    transition:transform .42s cubic-bezier(.22,.8,.24,1),visibility .42s;
  }
  .site-nav::before{
    content:"";
    position:absolute;
    top:96px;
    right:-10%;
    width:62%;
    height:3px;
    background:var(--neon);
    transform:rotate(11deg);
  }
  .site-nav[data-open],
  .site-header[data-open] .site-nav{transform:translateY(0);visibility:visible}
  .site-header[data-open]{background:transparent;border-bottom-color:transparent;-webkit-backdrop-filter:none;backdrop-filter:none}

  .site-nav__list{flex-direction:column;align-items:flex-start;gap:2px;width:100%}
  .site-nav__item{padding-left:0}
  .site-nav__item:nth-child(2){padding-left:10px}
  .site-nav__item:nth-child(3){padding-left:20px}
  .site-nav__item:nth-child(4){padding-left:30px}
  .site-nav__item:nth-child(5){padding-left:40px}
  .site-nav__item:nth-child(6){padding-left:50px}
  .site-nav__link{
    font-family:var(--font-display);
    font-size:clamp(24px,7vw,36px);
    font-weight:900;
    letter-spacing:.02em;
    padding:10px 0;
    color:var(--paper);
    border-bottom:0;
  }
  .site-nav__link:hover{background:none;color:var(--cyan)}
  .site-nav__link[aria-current="page"]{color:var(--yellow);border-bottom:0}
  .site-nav__index{font-size:12px;color:var(--cyan)}
  .site-nav__label{display:inline-block;transform:skewX(-6deg)}
  .site-nav__foot{display:block;width:100%;max-width:320px}
  .site-header[data-open] .site-nav__item{animation:navIn .36s ease both}
  .site-header[data-open] .site-nav__item:nth-child(1){animation-delay:.04s}
  .site-header[data-open] .site-nav__item:nth-child(2){animation-delay:.08s}
  .site-header[data-open] .site-nav__item:nth-child(3){animation-delay:.12s}
  .site-header[data-open] .site-nav__item:nth-child(4){animation-delay:.16s}
  .site-header[data-open] .site-nav__item:nth-child(5){animation-delay:.2s}
  .site-header[data-open] .site-nav__item:nth-child(6){animation-delay:.24s}
  @keyframes navIn{from{opacity:0;transform:translateX(-14px)}to{opacity:1;transform:none}}

  .footer-top{grid-template-columns:1fr;gap:36px}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}

@media (max-width:860px){
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid--12{grid-template-columns:repeat(6,minmax(0,1fr))}
  .col-4,.col-6,.col-8{grid-column:span 6}
}

@media (max-width:640px){
  body{font-size:16px}
  :root{--gutter:18px;--cut:14px}
  .grid--2,.grid--3{grid-template-columns:1fr}
  .grid--12{grid-template-columns:1fr}
  .col-4,.col-6,.col-8,.col-12{grid-column:span 1}
  .footer-grid{grid-template-columns:1fr}
  .stat-row{gap:24px}
  .brand__name{display:none}
  .tabs__list{flex-wrap:nowrap;overflow-x:auto;padding-bottom:2px}
  .tabs__btn{white-space:nowrap}
}

/* ---------- 12. 无障碍与动效降级 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .reveal{opacity:1;transform:none}
  .card:hover,.btn:hover,.site-nav__link:hover{transform:none}
  .media:hover .media__img{transform:none}
  .header-progress__bar{transition:none}
  .site-nav{transition:none}
}