/* =========================================================
   302COM · 共享样式表 /assets/site.css
   骨架：深空底 + 精密网格 + 锐利直角 + 电光青/信号橙撞色
   ========================================================= */

/* 1 · 设计令牌 --------------------------------------------- */
:root{
  --ink-950:#040C1A;
  --ink-900:#071228;
  --ink-800:#0B1B3A;
  --ink-700:#102A52;
  --line:#1E3054;
  --line-soft:rgba(30,48,84,.68);

  --paper:#F2F6FF;
  --paper-80:rgba(242,246,255,.82);
  --paper-70:rgba(242,246,255,.72);
  --paper-52:rgba(242,246,255,.52);
  --muted:#6E7FA3;

  --cyan:#00E5FF;
  --cyan-dim:rgba(0,229,255,.18);
  --orange:#FF6A00;
  --violet:#7C4DFF;
  --lime:#B6FF3B;

  --font-body:"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-head:"HarmonyOS Sans SC","Source Han Sans SC","Noto Sans SC","PingFang SC",system-ui,"Microsoft YaHei",sans-serif;
  --font-mono:ui-monospace,"JetBrains Mono","IBM Plex Mono",SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;

  --w-max:1200px;
  --w-narrow:760px;
  --pad-x:clamp(16px,4.4vw,40px);
  --header-h:88px;
  --header-h-compact:64px;
  --grid-step:72px;
}

/* 2 · Reset ------------------------------------------------ */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,p,ul,ol,figure,blockquote,fieldset{margin:0}
ul,ol{padding:0;list-style:none}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
img,svg,video{max-width:100%;display:block}
table{border-collapse:collapse;width:100%}
hr{border:0}

/* 3 · 页面基底 --------------------------------------------- */
body{
  min-height:100vh;
  background:var(--ink-800);
  color:var(--paper);
  font-family:var(--font-body);
  font-size:1rem;
  line-height:1.75;
  letter-spacing:.01em;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:-1;
  pointer-events:none;
  background-image:
    linear-gradient(to right, rgba(30,48,84,.5) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(30,48,84,.5) 1px, transparent 1px);
  background-size:var(--grid-step) var(--grid-step);
  opacity:.5;
}
body[data-nav-open]{overflow:hidden}

/* 4 · 排版 ------------------------------------------------- */
h1,h2,h3,h4{font-family:var(--font-head);font-weight:800;line-height:1.2;letter-spacing:.035em;font-stretch:87.5%}
h1{font-size:clamp(2.75rem,8.4vw,6rem);line-height:1.02;letter-spacing:.02em}
h2{font-size:clamp(1.75rem,3.6vw,2.25rem)}
h3{font-size:clamp(1.125rem,1.6vw,1.375rem)}
h4{font-size:1.0625rem;font-weight:700}
p{color:var(--paper-70)}
strong{color:var(--paper);font-weight:700}
.eyebrow,.mono{
  font-family:var(--font-mono);
  font-size:.6875rem;
  line-height:1.6;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--muted);
}
.lede{
  font-size:clamp(1.0625rem,1.5vw,1.25rem);
  line-height:1.7;
  color:var(--paper-80);
  max-width:40em;
}
.prose{max-width:44em}
.prose p{max-width:40em}
.prose p + p{margin-top:1.1em}
.text-accent{color:var(--cyan)}
.text-signal{color:var(--orange)}
.text-muted{color:var(--muted)}
.visually-hidden{
  position:absolute!important;
  width:1px;height:1px;
  padding:0;margin:-1px;
  overflow:hidden;clip:rect(0 0 0 0);
  white-space:nowrap;border:0;
}

/* 5 · 容器与布局 ------------------------------------------- */
.container{width:100%;max-width:var(--w-max);margin:0 auto;padding-left:var(--pad-x);padding-right:var(--pad-x)}
.container--narrow{max-width:var(--w-narrow)}
.container--wide{max-width:1440px}

.main-content{position:relative;display:block}
.main-content--inset{padding-top:calc(var(--header-h) + clamp(20px,4vw,56px))}

.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--split{grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr)}
.grid--rail{grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr)}

.section{position:relative;padding:clamp(56px,8vw,120px) 0;border-top:1px solid var(--line)}
.section__head{
  display:grid;
  grid-template-columns:auto minmax(0,1fr);
  gap:clamp(16px,3vw,44px);
  align-items:start;
  margin-bottom:clamp(28px,4vw,56px);
}
.section__index{
  font-family:var(--font-mono);
  font-size:clamp(2.5rem,7vw,5.25rem);
  font-weight:700;
  line-height:.85;
  letter-spacing:.02em;
  color:rgba(0,229,255,.16);
  -webkit-text-stroke:1px rgba(30,48,84,1);
}
.section__title{letter-spacing:.04em}
.section__sub{margin-top:10px;font-size:.9375rem;color:var(--muted);max-width:42em}
.section__body{position:relative}

.rule{height:1px;background:var(--line);border:0;width:100%}
.rule--accent{background:linear-gradient(90deg,var(--cyan),rgba(255,106,0,.5) 45%,transparent)}
.divider-label{
  display:flex;align-items:center;gap:14px;
  font-family:var(--font-mono);font-size:.6875rem;letter-spacing:.16em;text-transform:uppercase;
  color:var(--muted);
}
.divider-label::after{content:"";flex:1;height:1px;background:var(--line)}

/* 6 · 按钮 ------------------------------------------------- */
.btn{
  display:inline-flex;align-items:center;gap:12px;
  padding:14px 24px;
  border:1px solid var(--line);
  background:transparent;
  color:var(--paper);
  font-family:var(--font-head);
  font-size:.9375rem;font-weight:700;letter-spacing:.05em;
  transition:background .22s linear,border-color .22s linear,color .22s linear,transform .22s linear;
}
.btn:hover{transform:translateY(-2px)}
.btn__cn{white-space:nowrap}
.btn__en{
  font-family:var(--font-mono);
  font-size:.625rem;letter-spacing:.18em;text-transform:uppercase;
  opacity:.72;
}
.btn--signal{background:var(--orange);border-color:var(--orange);color:#100701}
.btn--signal:hover{background:#FF8124;border-color:#FF8124}
.btn--cyan{border-color:rgba(0,229,255,.65);color:var(--cyan)}
.btn--cyan:hover{background:var(--cyan);border-color:var(--cyan);color:var(--ink-900)}
.btn--ghost{border-color:var(--line);color:var(--paper-70)}
.btn--ghost:hover{border-color:var(--paper-52);color:var(--paper)}
.btn--block{width:100%;justify-content:space-between}

.link-arrow{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:.6875rem;letter-spacing:.14em;text-transform:uppercase;
  color:var(--cyan);
}
.link-arrow::after{content:"→";transition:transform .2s linear}
.link-arrow:hover::after{transform:translateX(4px)}

/* 7 · 标签 / 元信息 ---------------------------------------- */
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;
  border:1px solid var(--line);
  font-family:var(--font-mono);
  font-size:.6875rem;letter-spacing:.12em;text-transform:uppercase;
  color:var(--muted);
}
.tag--cyan{background:rgba(0,229,255,.12);border-color:rgba(0,229,255,.45);color:#9CF4FF}
.tag--violet{background:rgba(124,77,255,.18);border-color:rgba(124,77,255,.5);color:#C7B4FF}
.tag--lime{background:rgba(182,255,59,.14);border-color:rgba(182,255,59,.45);color:#DCFF9A}
.tag--orange{background:rgba(255,106,0,.16);border-color:rgba(255,106,0,.5);color:#FFB27A}
.tag-row{display:flex;flex-wrap:wrap;gap:8px}

.meta-list{border-top:1px solid var(--line)}
.meta-list__row{
  display:grid;grid-template-columns:minmax(0,9em) minmax(0,1fr);
  gap:12px;
  padding:12px 0;
  border-bottom:1px solid var(--line);
}
.meta-list__key{font-family:var(--font-mono);font-size:.6875rem;letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
.meta-list__val{font-size:.9375rem;color:var(--paper-80)}

/* 8 · 卡片 ------------------------------------------------- */
.card{
  position:relative;
  display:flex;flex-direction:column;gap:14px;
  padding:clamp(20px,2.6vw,28px);
  background:linear-gradient(180deg,rgba(16,42,82,.72),rgba(11,27,58,.72));
  border:1px solid var(--line);
  transition:transform .26s linear,border-color .26s linear,background .26s linear;
}
.card::before{content:"";position:absolute;left:0;top:0;bottom:0;width:2px;background:var(--line)}
.card:hover{transform:translateY(-2px);border-color:rgba(0,229,255,.5)}
.card--status::before{background:var(--cyan)}
.card--task::before{background:var(--orange)}
.card--list::before{background:var(--violet)}
.card--tag::before{background:var(--lime)}
.card__head{display:flex;align-items:baseline;justify-content:space-between;gap:12px}
.card__index{font-family:var(--font-mono);font-size:.6875rem;letter-spacing:.16em;color:var(--cyan)}
.card__title{font-family:var(--font-head);font-size:1.125rem;font-weight:700;letter-spacing:.03em;line-height:1.35}
.card__meta{font-family:var(--font-mono);font-size:.6875rem;letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}
.card__body{font-size:.9375rem;line-height:1.7;color:var(--paper-70)}
.card__foot{margin-top:auto;padding-top:8px;display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.card__detail{
  max-height:0;overflow:hidden;opacity:0;
  border-top:1px solid transparent;
  transition:max-height .3s linear,opacity .3s linear,border-color .3s linear;
}
.card:hover .card__detail,.card:focus-within .card__detail{
  max-height:240px;opacity:1;border-top-color:var(--line);padding-top:12px;
}

/* 9 · 数据与进度 ------------------------------------------- */
.ring{
  --ring-value:0;
  position:relative;
  width:clamp(112px,15vw,140px);
  aspect-ratio:1/1;
  border-radius:50%;
  display:grid;place-items:center;
  background:conic-gradient(var(--cyan) calc(var(--ring-value) * 1%), rgba(30,48,84,.85) 0);
  flex:0 0 auto;
}
.ring::after{content:"";position:absolute;inset:11px;border-radius:50%;background:var(--ink-800);border:1px solid var(--line)}
.ring--signal{background:conic-gradient(var(--orange) calc(var(--ring-value) * 1%), rgba(30,48,84,.85) 0)}
.ring__label{position:relative;z-index:1;text-align:center;line-height:1.25}
.ring__value{display:block;font-family:var(--font-mono);font-size:1.375rem;font-weight:700;color:var(--paper);letter-spacing:.02em}
.ring__unit{display:block;font-family:var(--font-mono);font-size:.625rem;letter-spacing:.16em;text-transform:uppercase;color:var(--muted)}

.progress-bar{position:relative;height:6px;background:rgba(30,48,84,.85);overflow:hidden}
.progress-bar__fill{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--cyan),var(--orange));transition:width .7s linear}

.hscroll{
  display:flex;gap:clamp(14px,2vw,22px);
  overflow-x:auto;
  padding:4px 0 18px;
  scroll-snap-type:x mandatory;
  -webkit-overflow-scrolling:touch;
}
.hscroll > *{flex:0 0 min(86vw,340px);scroll-snap-align:start}
.hscroll::-webkit-scrollbar{height:4px}
.hscroll::-webkit-scrollbar-track{background:var(--line)}
.hscroll::-webkit-scrollbar-thumb{background:var(--cyan)}

.timeline{border-top:1px solid var(--line)}
.timeline__item{position:relative;padding:20px 0 20px 26px;border-bottom:1px solid var(--line)}
.timeline__item::before{content:"";position:absolute;left:0;top:28px;width:8px;height:8px;background:var(--cyan)}

/* 10 · 图像容器 -------------------------------------------- */
.media{position:relative;border:1px solid var(--line);background:var(--ink-900);overflow:hidden}
.media__frame{
  position:relative;
  width:100%;
  aspect-ratio:16/9;
  background:
    linear-gradient(135deg,rgba(0,229,255,.16),rgba(255,106,0,.13) 70%,rgba(124,77,255,.12)),
    repeating-linear-gradient(90deg,rgba(30,48,84,.9) 0 1px,transparent 1px 24px),
    repeating-linear-gradient(0deg,rgba(30,48,84,.9) 0 1px,transparent 1px 24px);
}
.media__img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.media__caption{
  padding:10px 14px;
  border-top:1px solid var(--line);
  font-family:var(--font-mono);
  font-size:.6875rem;letter-spacing:.12em;text-transform:uppercase;
  color:var(--muted);
}
.media--square .media__frame{aspect-ratio:1/1}
.media--tall .media__frame{aspect-ratio:4/5}
.media--wide .media__frame{aspect-ratio:21/9}

/* 11 · 显现动效 -------------------------------------------- */
.js .reveal{opacity:0;transform:translateY(14px);transition:opacity .42s linear,transform .42s linear}
.js .reveal[data-visible="true"]{opacity:1;transform:none}

/* 12 · 顶部导航 -------------------------------------------- */
.skip-link{
  position:fixed;top:10px;left:10px;z-index:200;
  padding:10px 16px;
  background:var(--cyan);color:var(--ink-900);
  font-family:var(--font-mono);font-size:.75rem;font-weight:700;letter-spacing:.12em;
  transform:translateY(-220%);
  transition:transform .2s linear;
}
.skip-link:focus{transform:none}

.site-header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background-color .3s linear,border-color .3s linear,box-shadow .3s linear;
}
.site-header[data-scrolled="true"]{
  background:rgba(7,18,40,.94);
  border-bottom-color:var(--line);
  box-shadow:0 12px 30px rgba(4,12,26,.5);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
}
.scroll-progress{
  position:absolute;left:0;bottom:-1px;
  height:2px;width:0;
  background:linear-gradient(90deg,var(--cyan),var(--orange));
  opacity:0;
  transition:opacity .3s linear;
}
.site-header[data-scrolled="true"] .scroll-progress{opacity:1}

.header-inner{
  position:relative;z-index:2;
  width:100%;max-width:var(--w-max);
  margin:0 auto;
  padding:0 var(--pad-x);
  height:var(--header-h);
  display:flex;align-items:center;gap:clamp(16px,3vw,36px);
  transition:height .3s linear;
}
.site-header[data-compact="true"] .header-inner{height:var(--header-h-compact)}

.brand{display:flex;align-items:baseline;gap:10px;flex:0 0 auto;min-width:0}
.brand__mark{
  font-family:var(--font-mono);
  font-size:1.0625rem;font-weight:700;letter-spacing:.14em;
  color:var(--cyan);
}
.brand__sig{font-size:.8125rem;letter-spacing:.02em;color:var(--paper-52);white-space:nowrap}
.brand__sub{display:none;font-family:var(--font-mono);font-size:.6875rem;letter-spacing:.16em;color:var(--paper-52)}

.nav-primary{
  position:static;
  margin-left:auto;
  display:flex;align-items:center;
  gap:clamp(16px,2.4vw,30px);
}
.nav-list{display:flex;align-items:center;gap:clamp(12px,1.8vw,24px)}
.nav-link{
  position:relative;
  display:inline-block;
  padding:8px 0;
  font-size:.9375rem;letter-spacing:.03em;
  color:var(--paper-70);
  transition:color .2s linear;
  white-space:nowrap;
}
.nav-link:hover{color:var(--paper)}
.nav-link[aria-current="page"]{color:var(--cyan)}
.nav-link[aria-current="page"]::after{
  content:"";position:absolute;left:0;right:0;bottom:2px;height:1px;background:var(--cyan);
}
.nav-actions{display:flex;align-items:center}
.header-cta{
  display:inline-flex;flex-direction:column;align-items:flex-start;gap:1px;
  padding:9px 18px;
  border:1px solid rgba(0,229,255,.7);
  color:var(--cyan);
  font-family:var(--font-head);
  font-size:.875rem;font-weight:700;letter-spacing:.05em;
  transition:background-color .22s linear,color .22s linear,border-color .22s linear;
}
.header-cta__cn{line-height:1.2;white-space:nowrap}
.header-cta__en{font-family:var(--font-mono);font-size:.5625rem;font-weight:400;letter-spacing:.18em;text-transform:uppercase;opacity:.75}
.header-cta:hover{background:var(--cyan);color:var(--ink-900);border-color:var(--cyan)}

.nav-toggle{
  display:none;
  position:relative;z-index:3;
  margin-left:auto;
  align-items:center;gap:10px;
  padding:10px 4px;
  color:var(--paper);
  font-family:var(--font-mono);
  font-size:.6875rem;letter-spacing:.16em;text-transform:uppercase;
}
.nav-toggle__bars{position:relative;display:block;width:20px;height:12px}
.nav-toggle__bars i{
  position:absolute;left:0;right:0;height:1.5px;background:currentColor;
  transition:transform .24s linear;
}
.nav-toggle__bars i:first-child{top:0}
.nav-toggle__bars i:last-child{bottom:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:first-child{transform:translateY(5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:last-child{transform:translateY(-5px) rotate(-45deg)}

/* 13 · 页脚 ------------------------------------------------ */
.site-footer{
  position:relative;
  margin-top:clamp(56px,9vw,130px);
  background:var(--ink-900);
  border-top:1px solid var(--line);
}
.footer-inner{
  width:100%;max-width:var(--w-max);
  margin:0 auto;
  padding:clamp(40px,6vw,72px) var(--pad-x) 0;
}
.footer-grid{
  display:grid;
  grid-template-columns:minmax(0,1.45fr) minmax(0,1fr) minmax(0,1fr) minmax(0,1.35fr);
  gap:clamp(24px,4vw,52px);
}
.footer-brand{display:flex;flex-direction:column;gap:14px}
.footer-mark{
  display:flex;align-items:baseline;gap:10px;flex-wrap:wrap;
  font-family:var(--font-mono);
  font-size:1.125rem;font-weight:700;letter-spacing:.14em;
  color:var(--cyan);
}
.footer-mark__sig{font-size:.75rem;font-weight:400;letter-spacing:.04em;color:var(--muted)}
.footer-slogan{font-size:.9375rem;line-height:1.7;color:var(--paper-80);max-width:26em}
.footer-sync{
  display:flex;gap:10px;
  font-size:.8125rem;line-height:1.7;color:var(--muted);
  max-width:30em;
}
.status-dot{
  flex:0 0 auto;
  width:7px;height:7px;margin-top:.6em;
  background:var(--lime);
  box-shadow:0 0 0 3px rgba(182,255,59,.16);
}
.footer-col{display:flex;flex-direction:column;gap:6px}
.footer-col__title{
  padding-top:12px;
  border-top:1px solid var(--line);
  font-family:var(--font-mono);
  font-size:.6875rem;font-weight:400;letter-spacing:.18em;text-transform:uppercase;
  color:var(--muted);
}
.footer-list{display:flex;flex-direction:column}
.footer-link{
  display:inline-block;
  padding:7px 0;
  font-size:.9375rem;
  color:var(--paper-70);
  transition:color .2s linear,transform .2s linear;
}
.footer-link:hover{color:var(--cyan);transform:translateX(3px)}
.footer-contact{display:flex;flex-direction:column;gap:12px}
.footer-contact__list{display:flex;flex-direction:column;gap:12px}
.footer-contact__item{display:flex;flex-direction:column;gap:2px}
.footer-contact__label{
  font-family:var(--font-mono);
  font-size:.625rem;letter-spacing:.16em;text-transform:uppercase;
  color:var(--muted);
}
.footer-contact__value{font-size:.9375rem;color:var(--paper-80);word-break:break-word}
.footer-contact__note{font-size:.8125rem;line-height:1.7;color:var(--muted);max-width:30em}
.footer-legal{
  margin-top:clamp(32px,5vw,56px);
  padding:20px 0 28px;
  border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-family:var(--font-mono);
  font-size:.6875rem;letter-spacing:.08em;color:var(--muted);
}
.footer-legal__icp{color:var(--muted)}
.footer-legal__year{color:var(--paper-52)}

.to-top{
  position:fixed;right:clamp(12px,3vw,28px);bottom:clamp(12px,3vw,28px);
  z-index:90;
  display:inline-flex;align-items:center;gap:8px;
  padding:10px 14px;
  background:rgba(7,18,40,.95);
  border:1px solid var(--line);
  color:var(--paper-52);
  font-family:var(--font-mono);
  font-size:.625rem;letter-spacing:.14em;text-transform:uppercase;
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .24s linear,transform .24s linear,visibility .24s linear,color .2s linear,border-color .2s linear;
}
.to-top[data-visible="true"]{opacity:1;visibility:visible;transform:none}
.to-top:hover{color:var(--cyan);border-color:rgba(0,229,255,.6)}

/* 14 · 焦点态 ---------------------------------------------- */
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px}
.nav-toggle:focus-visible,.to-top:focus-visible{outline-color:var(--orange)}

/* 15 · 响应式 ---------------------------------------------- */
@media (max-width:1080px){
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid--4{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:1023px){
  .nav-toggle{display:inline-flex}
  .brand{margin-right:auto}
  .nav-primary{
    position:fixed;
    inset:0;
    z-index:1;
    margin:0;
    display:flex;flex-direction:column;align-items:stretch;justify-content:flex-start;
    gap:0;
    padding:calc(var(--header-h) + 20px) var(--pad-x) 40px;
    background:var(--ink-900);
    overflow-y:auto;
    opacity:0;visibility:hidden;pointer-events:none;
    transform:translateY(-10px);
    transition:opacity .28s linear,transform .28s linear,visibility .28s linear;
  }
  .nav-primary[data-open]{
    opacity:1;visibility:visible;pointer-events:auto;transform:none;
  }
  .nav-list{flex-direction:column;align-items:stretch;gap:0;width:100%}
  .nav-item{border-bottom:1px solid var(--line)}
  .nav-item:first-child{border-top:1px solid var(--line)}
  .nav-link{
    display:block;
    padding:18px 0;
    font-family:var(--font-head);
    font-size:1.25rem;font-weight:700;letter-spacing:.05em;
    color:var(--paper-80);
  }
  .nav-link[aria-current="page"]::after{display:none}
  .nav-link[aria-current="page"]{color:var(--cyan);padding-left:14px;border-left:2px solid var(--cyan)}
  .nav-actions{margin-top:24px;width:100%}
  .header-cta{width:100%;align-items:center;padding:16px;border-color:var(--orange);color:var(--orange)}
  .header-cta:hover{background:var(--orange);color:#100701}
  .site-header[data-compact="true"] .header-inner{height:var(--header-h)}
  .grid--split,.grid--rail,.grid--3{grid-template-columns:minmax(0,1fr)}
}
@media (max-width:860px){
  .brand__sig{display:none}
  .brand__sub{display:block}
}
@media (max-width:640px){
  :root{--grid-step:48px}
  .grid--2,.grid--4{grid-template-columns:minmax(0,1fr)}
  .footer-grid{grid-template-columns:minmax(0,1fr)}
  .section__head{grid-template-columns:minmax(0,1fr);gap:14px}
  .section__index{font-size:2.75rem}
  .footer-legal{flex-direction:column;align-items:flex-start;gap:8px}
  .btn{width:100%;justify-content:space-between}
  .header-cta{width:100%}
}

/* 16 · 减弱动效 -------------------------------------------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms!important;
    animation-iteration-count:1!important;
    transition-duration:.001ms!important;
  }
  .js .reveal{opacity:1;transform:none}
  .card:hover{transform:none}
  .btn:hover{transform:none}
  .footer-link:hover{transform:none}
  .to-top[data-visible="true"]{transform:none}
}