/* ==========================================================================
   UED赛场 · 共享样式表 /assets/site.css
   视觉体系：深夜蓝电子屏 + 荧光绿数据高亮 + 电光橙节点 + 框架式导航
   ========================================================================== */

:root{
  --ink-900:#050B1F;
  --ink-800:#0C1B3A;
  --indigo:#1B1240;
  --teal:#06302C;
  --green:#3DFF9E;
  --orange:#FF7A2F;
  --white:#F2F7FF;
  --mist:#8AA3C8;
  --amber:#FFD166;
  --wine:#B3243C;

  --font-head:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-body:system-ui,-apple-system,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-mono:"JetBrains Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;

  --rail-w:46px;
  --stream-w:26px;
  --radius-lg:32px;
  --radius-md:20px;
  --radius-pill:999px;
  --gap:28px;
  --edge:rgba(138,163,200,.16);
  --edge-soft:rgba(138,163,200,.10);
  --shadow-deep:0 28px 70px rgba(0,0,0,.55);
  --maxw:1280px;
}

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

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

body{
  margin:0;
  background:var(--ink-900);
  color:var(--white);
  font-family:var(--font-body);
  font-size:16px;
  font-weight:400;
  line-height:1.7;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

h1,h2,h3,h4{
  font-family:var(--font-head);
  font-weight:900;
  letter-spacing:-.02em;
  line-height:1.14;
  margin:0;
}

p{margin:0 0 1em;max-width:70ch}
p:last-child{margin-bottom:0}
ul,ol{margin:0;padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
a{color:var(--green);text-decoration:none}
a:hover{color:#8bffc5}
button{font:inherit;color:inherit}
strong{font-weight:700}

:focus-visible{
  outline:3px solid var(--orange);
  outline-offset:3px;
  border-radius:8px;
}

::selection{background:var(--green);color:var(--ink-900)}

.mono{
  font-family:var(--font-mono);
  font-weight:700;
  font-variant-numeric:tabular-nums;
  letter-spacing:0;
}

.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;
}

/* ---------- 顶部滚动进度条 ---------- */
.scroll-progress{
  position:fixed;
  inset:0 0 auto 0;
  height:4px;
  z-index:200;
  background:rgba(138,163,200,.14);
  pointer-events:none;
}
.scroll-progress__bar{
  display:block;
  height:100%;
  width:100%;
  transform:scaleX(0);
  transform-origin:0 50%;
  background:linear-gradient(90deg,var(--green),var(--orange));
}

/* ---------- 跳至主要内容 ---------- */
.skip-link{
  position:absolute;
  left:16px;
  top:-84px;
  z-index:300;
  padding:12px 22px;
  background:var(--green);
  color:var(--ink-900);
  font-weight:700;
  font-size:15px;
  border-radius:0 0 16px 16px;
  transition:top .2s ease;
}
.skip-link:focus{top:0;color:var(--ink-900)}

/* ---------- 左侧框架竖栏 ---------- */
.frame-rail{
  display:none;
  position:fixed;
  left:0;top:4px;bottom:0;
  width:var(--rail-w);
  z-index:55;
  flex-direction:column;
  align-items:center;
  justify-content:space-between;
  padding:22px 0 26px;
  background:linear-gradient(180deg,rgba(12,27,58,.92),rgba(5,11,31,.92));
  border-right:1px solid var(--edge);
}
.frame-rail__word{
  writing-mode:vertical-rl;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.32em;
  color:var(--mist);
}
.frame-rail__ticks{
  width:2px;
  height:72px;
  border-radius:2px;
  background:linear-gradient(180deg,var(--green),var(--orange));
  opacity:.85;
}

/* ---------- 右侧数据流 ---------- */
.data-stream{
  display:none;
  position:fixed;
  right:0;top:0;bottom:0;
  width:var(--stream-w);
  z-index:30;
  pointer-events:none;
  background-image:repeating-linear-gradient(
    to bottom,
    rgba(61,255,158,.55) 0 3px,
    rgba(138,163,200,.20) 3px 6px,
    transparent 6px 16px
  );
  background-size:10px 16px;
  background-repeat:repeat-y;
  background-position:right 0;
  animation:streamFlow 6s linear infinite;
  -webkit-mask-image:linear-gradient(to bottom,transparent,#000 18%,#000 82%,transparent);
  mask-image:linear-gradient(to bottom,transparent,#000 18%,#000 82%,transparent);
}
@keyframes streamFlow{
  from{background-position:right 0}
  to{background-position:right 96px}
}

/* ---------- 页头 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:90;
  padding:18px 0 16px;
  background:rgba(5,11,31,.82);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--edge-soft);
  transition:padding .28s ease,background .28s ease;
}
.site-header[data-compact="true"]{
  padding:10px 0 9px;
  background:rgba(5,11,31,.95);
}
.site-header__slash{
  position:absolute;
  left:0;
  bottom:0;
  width:min(340px,44%);
  height:3px;
  border-radius:0 3px 3px 0;
  background:linear-gradient(90deg,var(--green),var(--orange));
  transform:skewX(-24deg);
  transform-origin:left bottom;
}
.site-header__inner{
  width:min(var(--maxw),100% - 40px);
  margin-inline:auto;
  display:flex;
  align-items:center;
  gap:20px;
  min-height:44px;
}

/* 品牌 */
.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  flex:0 0 auto;
  color:var(--white);
}
.brand:hover{color:var(--white)}
.brand__pulse{
  width:10px;height:10px;
  border-radius:50%;
  background:var(--green);
  flex:0 0 auto;
  animation:pulse 2.4s ease-out infinite;
}
@keyframes pulse{
  0%{box-shadow:0 0 0 0 rgba(61,255,158,.55)}
  70%{box-shadow:0 0 0 11px rgba(61,255,158,0)}
  100%{box-shadow:0 0 0 0 rgba(61,255,158,0)}
}
.brand__text{display:block}
.brand__name{
  display:block;
  font-family:var(--font-head);
  font-weight:900;
  font-size:19px;
  line-height:1.1;
  letter-spacing:-.02em;
}
.brand__slogan{
  display:block;
  font-size:11px;
  letter-spacing:.26em;
  color:var(--mist);
  line-height:1.4;
}

/* 导航 */
.site-nav{
  display:flex;
  align-items:center;
  gap:16px;
  margin-left:auto;
}
.site-nav__list{
  display:flex;
  align-items:center;
  gap:2px;
}
.nav-link{
  display:inline-block;
  padding:9px 15px;
  border-radius:var(--radius-pill);
  font-size:14.5px;
  font-weight:500;
  color:var(--mist);
  white-space:nowrap;
  transition:background .2s ease,color .2s ease;
}
.nav-link:hover{
  color:var(--white);
  background:rgba(138,163,200,.12);
}
.nav-link[aria-current="page"]{
  background:var(--green);
  color:var(--ink-900);
  font-weight:700;
}
.nav-link[aria-current="page"]:hover{color:var(--ink-900)}

.site-nav__foot{
  display:flex;
  align-items:center;
  gap:12px;
}

/* 刷新节奏芯片 */
.refresh-chip{
  display:none;
  align-items:center;
  gap:8px;
  padding:6px 14px 6px 10px;
  border-radius:var(--radius-pill);
  background:rgba(61,255,158,.08);
  border:1px solid rgba(61,255,158,.30);
  font-family:var(--font-mono);
  font-size:12.5px;
  color:var(--green);
}
.refresh-chip__ring{
  width:14px;height:14px;
  flex:0 0 auto;
  border-radius:50%;
  background:conic-gradient(
    from -90deg,
    var(--green) 0deg calc(var(--p,0) * 360deg),
    rgba(61,255,158,.18) calc(var(--p,0) * 360deg) 360deg
  );
  -webkit-mask:radial-gradient(farthest-side,transparent calc(100% - 3px),#000 calc(100% - 3px));
  mask:radial-gradient(farthest-side,transparent calc(100% - 3px),#000 calc(100% - 3px));
}
.refresh-chip__text{
  font-family:var(--font-body);
  font-size:12px;
  letter-spacing:.08em;
  color:rgba(138,163,200,.95);
}
.refresh-chip__num{font-weight:700}
.refresh-chip__unit{color:rgba(61,255,158,.7)}
.refresh-chip[data-pulse="true"]{
  animation:chipPulse .7s ease-out;
  background:rgba(61,255,158,.22);
}
@keyframes chipPulse{
  0%{box-shadow:0 0 0 0 rgba(61,255,158,.5)}
  100%{box-shadow:0 0 0 16px rgba(61,255,158,0)}
}

/* 移动端菜单按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:10px;
  margin-left:auto;
  padding:10px 16px;
  border-radius:var(--radius-pill);
  background:rgba(138,163,200,.10);
  border:1px solid var(--edge);
  color:var(--white);
  font-size:14px;
  font-weight:700;
  cursor:pointer;
}
.nav-toggle__text{letter-spacing:.06em}
.nav-toggle__bars{
  display:inline-flex;
  flex-direction:column;
  justify-content:center;
  gap:4px;
  width:16px;
}
.nav-toggle__bars span{
  display:block;
  width:16px;
  height:2px;
  border-radius:2px;
  background:var(--green);
  transition:transform .24s ease;
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:first-child{
  transform:translateY(3px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:last-child{
  transform:translateY(-3px) rotate(-45deg);
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:11px 22px;
  border-radius:var(--radius-pill);
  border:1px solid transparent;
  font-size:14.5px;
  font-weight:700;
  letter-spacing:.01em;
  text-decoration:none;
  cursor:pointer;
  transition:background .2s ease,color .2s ease,border-color .2s ease;
}
.btn--solid{background:var(--green);color:var(--ink-900)}
.btn--solid:hover{background:#86ffc6;color:var(--ink-900)}
.btn--ghost{
  background:transparent;
  color:var(--white);
  border-color:rgba(138,163,200,.42);
}
.btn--ghost:hover{border-color:var(--green);color:var(--green)}
.btn--orange{background:var(--orange);color:#1a0a01}
.btn--orange:hover{background:#ff9a5d;color:#1a0a01}

/* ---------- 内容容器与网格 ---------- */
.wrap{width:min(var(--maxw),100% - 40px);margin-inline:auto}
.wrap--narrow{width:min(760px,100% - 40px);margin-inline:auto}

.grid{display:grid;gap:var(--gap)}
.grid--7-3{grid-template-columns:minmax(0,7fr) minmax(0,3fr)}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}

/* ---------- 分区与文字层级 ---------- */
.zone{padding:clamp(56px,8vw,104px) 0}
.zone--panel{background:var(--ink-800)}
.zone--indigo{background:var(--indigo)}
.zone--teal{background:var(--teal)}

.section-kicker{
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.22em;
  color:var(--orange);
  margin:0 0 14px;
  max-width:none;
}
.section-title{
  font-family:var(--font-head);
  font-size:clamp(28px,4.2vw,46px);
  font-weight:900;
  letter-spacing:-.02em;
  line-height:1.12;
  margin:0 0 .5em;
}
.lead{
  font-size:clamp(17px,1.5vw,19px);
  color:rgba(242,247,255,.82);
  max-width:66ch;
}

/* ---------- 卡片 ---------- */
.card{
  background:var(--ink-800);
  border:1px solid var(--edge);
  border-radius:var(--radius-lg);
  padding:clamp(22px,3vw,32px);
}
.card--indigo{background:var(--indigo);border-color:rgba(138,163,200,.20)}
.card--teal{background:var(--teal);border-color:rgba(61,255,158,.18)}

/* ---------- 胶囊筛选器 ---------- */
.pill{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:8px 16px;
  border-radius:var(--radius-pill);
  background:rgba(138,163,200,.12);
  border:1px solid rgba(138,163,200,.22);
  color:var(--mist);
  font-size:13.5px;
  letter-spacing:.03em;
  cursor:pointer;
  transition:background .2s ease,color .2s ease,border-color .2s ease;
}
.pill:hover{color:var(--white);border-color:rgba(138,163,200,.45)}
.pill[aria-pressed="true"],
.pill.is-active{
  background:var(--green);
  border-color:var(--green);
  color:var(--ink-900);
  font-weight:700;
}

/* ---------- 分段标签页 ---------- */
.tabs{display:block}
.tabs__list{
  display:flex;
  flex-wrap:wrap;
  gap:6px;
  padding:6px;
  background:rgba(12,27,58,.72);
  border:1px solid var(--edge);
  border-radius:var(--radius-pill);
}
.tabs__tab{
  appearance:none;
  border:0;
  background:transparent;
  padding:10px 20px;
  border-radius:var(--radius-pill);
  font-size:15px;
  font-weight:700;
  color:var(--mist);
  cursor:pointer;
  transition:background .2s ease,color .2s ease;
}
.tabs__tab:hover{color:var(--white)}
.tabs__tab[aria-selected="true"]{
  background:var(--green);
  color:var(--ink-900);
}
.tabs__panel{padding-top:26px;animation:tabFade .2s ease both}
.tabs__panel[hidden]{display:none}
@keyframes tabFade{
  from{opacity:0;transform:translateX(10px)}
  to{opacity:1;transform:none}
}

/* ---------- 手风琴问答 ---------- */
.qa{border-top:1px solid var(--edge)}
.qa__item{border-bottom:1px solid var(--edge)}
.qa__item summary{
  display:flex;
  align-items:baseline;
  gap:16px;
  padding:22px 4px;
  cursor:pointer;
  list-style:none;
  font-family:var(--font-head);
  font-weight:900;
  font-size:19px;
  letter-spacing:-.01em;
}
.qa__item summary::-webkit-details-marker{display:none}
.qa__item summary::after{
  content:"+";
  margin-left:auto;
  font-family:var(--font-mono);
  font-size:20px;
  color:var(--green);
  line-height:1;
}
.qa__item[open] summary::after{content:"–";color:var(--orange)}
.qa__body{
  padding:0 4px 26px;
  color:var(--mist);
  max-width:66ch;
}

/* ---------- 图片容器 ---------- */
.media-frame{
  position:relative;
  overflow:hidden;
  border-radius:var(--radius-lg);
  background:var(--ink-800);
  aspect-ratio:16/9;
  border:1px solid var(--edge);
}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--tall{aspect-ratio:4/5}
.media-frame img,
.media-frame video{
  width:100%;
  height:100%;
  object-fit:cover;
}
.media-frame__tag{
  position:absolute;
  left:16px;
  bottom:16px;
  padding:6px 14px;
  border-radius:var(--radius-pill);
  background:rgba(5,11,31,.78);
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--green);
}

/* ---------- 比分读数 ---------- */
.score-line{
  display:flex;
  align-items:baseline;
  gap:14px;
  font-family:var(--font-mono);
  font-weight:700;
  font-variant-numeric:tabular-nums;
}
.score-num{
  font-size:clamp(38px,6vw,64px);
  line-height:1;
  color:var(--white);
}
.score-num--lead{color:var(--green)}
.score-num--chase{color:var(--orange)}

/* ---------- 层级：旁注 / 延伸入口 ---------- */
.aside-note{
  font-size:14px;
  color:var(--mist);
  border-left:2px solid rgba(255,122,47,.65);
  padding-left:16px;
}
.more-link{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.12em;
  color:var(--green);
}
.more-link::after{content:"→"}
.more-link:hover{color:var(--orange)}

/* ---------- 面包屑 ---------- */
.breadcrumb{
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.06em;
  color:var(--mist);
}
.breadcrumb ol{display:flex;flex-wrap:wrap;gap:8px}
.breadcrumb li{display:flex;gap:8px;align-items:center}
.breadcrumb li+li::before{content:"/";color:rgba(138,163,200,.45)}
.breadcrumb a{color:var(--mist)}
.breadcrumb a:hover{color:var(--green)}
.breadcrumb [aria-current="page"]{color:var(--white)}

/* ---------- 显现动效 ---------- */
.reveal{
  opacity:0;
  transform:translateY(24px);
  transition:opacity .6s ease,transform .6s cubic-bezier(.2,.8,.2,1);
  transition-delay:var(--d,0ms);
}
.reveal.is-visible{
  opacity:1;
  transform:none;
}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(64px,9vw,120px);
  padding:clamp(56px,7vw,88px) 0 26px;
  background:
    radial-gradient(120% 90% at 12% 0%,rgba(61,255,158,.10),transparent 58%),
    radial-gradient(90% 80% at 92% 8%,rgba(27,18,64,.75),transparent 60%),
    var(--teal);
  color:var(--white);
  overflow:hidden;
}
.site-footer__slash{
  position:absolute;
  left:-4%;
  right:-4%;
  top:0;
  height:2px;
  background:linear-gradient(90deg,transparent,var(--green) 24%,var(--orange) 62%,transparent);
  transform:skewY(-.9deg);
}
.site-footer__inner{
  width:min(var(--maxw),100% - 40px);
  margin-inline:auto;
  display:grid;
  grid-template-columns:minmax(0,1.1fr) minmax(0,1.7fr);
  gap:clamp(36px,5vw,64px);
  align-items:start;
}
.site-footer__mark{
  font-family:var(--font-head);
  font-size:clamp(26px,3vw,34px);
  font-weight:900;
  letter-spacing:-.02em;
  margin:0 0 6px;
  max-width:none;
}
.site-footer__tagline{
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.28em;
  color:var(--green);
  margin:0 0 18px;
  max-width:none;
}
.site-footer__meter{
  font-size:14px;
  color:var(--mist);
  max-width:34ch;
  margin:0 0 22px;
}
.site-footer__cta{margin:0 0 26px;max-width:none}

.site-contact{
  display:grid;
  gap:8px;
  padding-top:22px;
  border-top:1px solid rgba(138,163,200,.18);
}
.site-contact li{
  display:flex;
  gap:12px;
  align-items:baseline;
  font-size:14px;
}
.site-contact__key{
  flex:0 0 66px;
  font-size:12.5px;
  letter-spacing:.08em;
  color:rgba(138,163,200,.72);
}
.site-contact__val{
  color:var(--white);
  word-break:break-all;
  font-variant-numeric:tabular-nums;
}
.site-contact__note{
  margin:14px 0 0;
  font-size:13px;
  color:rgba(138,163,200,.78);
  max-width:32ch;
}

.site-footer__columns{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(20px,3vw,36px);
}
.footer-col__title{
  font-family:var(--font-mono);
  font-size:12.5px;
  font-weight:700;
  letter-spacing:.18em;
  color:var(--amber);
  margin:0 0 18px;
}
.footer-col__list li+li{margin-top:10px}
.footer-col__link{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:15px;
  color:var(--mist);
  transition:color .2s ease;
}
.footer-col__link::before{
  content:"";
  width:7px;
  height:2px;
  border-radius:2px;
  background:var(--green);
  opacity:.5;
  transition:width .2s ease,opacity .2s ease;
}
.footer-col__link:hover{color:var(--white)}
.footer-col__link:hover::before{width:16px;opacity:1}

.site-footer__meta{
  width:min(var(--maxw),100% - 40px);
  margin:clamp(40px,5vw,64px) auto 0;
  padding-top:20px;
  border-top:1px solid rgba(138,163,200,.18);
  display:flex;
  flex-wrap:wrap;
  gap:10px 28px;
  justify-content:space-between;
  align-items:baseline;
  font-size:13px;
  color:rgba(138,163,200,.82);
}
.site-footer__legal{margin:0;max-width:none}
.site-footer__copy{margin:0;max-width:none;font-family:var(--font-mono);letter-spacing:.04em}

/* ---------- 响应式 ---------- */
@media (min-width:1024px){
  body{padding-left:var(--rail-w)}
  .frame-rail{display:flex}
}

@media (min-width:1280px){
  body{padding-right:var(--stream-w)}
  .data-stream{display:block}
  .refresh-chip{display:inline-flex}
}

@media (max-width:1279px){
  .nav-link{padding:9px 13px;font-size:14px}
  .site-nav{gap:12px}
}

/* 移动端：导航变为底部抽屉 */
@media (max-width:1023px){
  html.nav-open{overflow:hidden}

  .nav-toggle{display:inline-flex}

  .site-header{padding:14px 0 13px}
  .site-header__inner{width:calc(100% - 32px);gap:12px}
  .brand__slogan{letter-spacing:.2em;font-size:10px}

  .site-nav{
    position:fixed;
    left:0;right:0;bottom:0;
    z-index:120;
    display:block;
    margin:0;
    max-height:82vh;
    overflow-y:auto;
    padding:24px 20px calc(30px + env(safe-area-inset-bottom,0px));
    background:var(--ink-800);
    border-top:1px solid rgba(61,255,158,.34);
    border-radius:28px 28px 0 0;
    box-shadow:0 -24px 60px rgba(0,0,0,.62);
    transform:translateY(110%);
    visibility:hidden;
    transition:transform .34s cubic-bezier(.2,.8,.2,1),visibility .34s;
  }
  .site-nav[data-open="false"]{
    transform:translateY(110%);
    visibility:hidden;
  }
  .site-nav[data-open="true"]{
    transform:translateY(0);
    visibility:visible;
  }
  .site-nav__list{
    display:grid;
    grid-template-columns:repeat(2,minmax(0,1fr));
    gap:8px;
  }
  .nav-link{
    display:block;
    padding:14px 16px;
    border-radius:16px;
    background:rgba(138,163,200,.08);
    font-size:15.5px;
    text-align:center;
  }
  .site-nav__foot{
    flex-direction:column;
    align-items:stretch;
    gap:14px;
    margin-top:20px;
    padding-top:20px;
    border-top:1px solid var(--edge);
  }
  .site-nav__foot .refresh-chip{
    display:inline-flex;
    justify-content:center;
  }
  .site-nav__foot .btn{width:100%}

  .grid--7-3,
  .grid--3,
  .grid--2{grid-template-columns:minmax(0,1fr)}

  .site-footer__inner{grid-template-columns:minmax(0,1fr)}
  .site-footer__columns{grid-template-columns:repeat(2,minmax(0,1fr))}
  .tabs__list{border-radius:24px}
}

@media (max-width:560px){
  p{max-width:100%}
  .wrap,.wrap--narrow,.site-footer__inner,.site-footer__meta{width:calc(100% - 32px)}
  .site-footer__columns{grid-template-columns:minmax(0,1fr)}
  .site-footer__meta{flex-direction:column;align-items:flex-start}
  .site-contact__key{flex:0 0 60px}
}

/* ---------- 无障碍：降低动效 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms!important;
    animation-iteration-count:1!important;
    transition-duration:.001ms!important;
  }
  .data-stream{animation:none}
  .brand__pulse{animation:none;box-shadow:0 0 0 3px rgba(61,255,158,.28)}
  .reveal{opacity:1;transform:none}
}