/* ============================================================
   球速体育 · 共享样式 /assets/site.css
   夜间赛事实时数据台 · 深夜蓝黑 + 荧光青 / 赛道橙
   ============================================================ */

/* ---------- 1. 设计变量 ---------- */
:root{
  --qb-night:#070C18;
  --qb-board:#0E1830;
  --qb-line:#16224A;
  --qb-cyan:#22E3D2;
  --qb-orange:#FF8A1E;
  --qb-red:#FF3B4E;
  --qb-mist:#A8B6D9;
  --qb-white:#F2F6FF;
  --qb-gold:#FFD166;
  --qb-lift:#1E2B52;

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

  --qb-header-h:72px;
  --qb-max:1440px;
  --qb-gutter:clamp(16px,3vw,44px);
  --qb-shadow:0 22px 44px -30px rgba(0,0,0,.95);
  --qb-speed:cubic-bezier(.2,.7,.2,1);
  --qb-progress:0;
}

/* ---------- 2. reset ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:calc(var(--qb-header-h) + 24px);
}
body{
  margin:0;
  background-color:var(--qb-night);
  background-image:
    radial-gradient(900px 420px at 10% -8%,rgba(34,227,210,.10),transparent 70%),
    radial-gradient(760px 380px at 94% 0%,rgba(255,138,30,.075),transparent 72%);
  background-repeat:no-repeat;
  color:var(--qb-mist);
  font-family:var(--qb-font);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
}
h1,h2,h3,h4,h5,p,figure,blockquote{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
img,svg,video{display:block;max-width:100%;}
a{color:var(--qb-cyan);text-decoration:none;}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
table{border-collapse:collapse;width:100%;}
:focus-visible{outline:2px solid var(--qb-cyan);outline-offset:3px;}
#main-content{display:block;}
#main-content:focus{outline:none;}

/* ---------- 3. 中文排版 ---------- */
h1,h2,h3,h4{
  color:var(--qb-white);
  font-weight:900;
  letter-spacing:-.02em;
  line-height:1.14;
  word-break:break-word;
}
p{max-width:74ch;}

.qb-display{
  font-size:clamp(38px,7.2vw,88px);
  font-weight:900;
  letter-spacing:-.035em;
  line-height:1.02;
  color:var(--qb-white);
}
.qb-title{
  font-size:clamp(26px,3.4vw,40px);
  font-weight:900;
  letter-spacing:-.025em;
  color:var(--qb-white);
}
.qb-title-sm{
  font-size:clamp(19px,2.1vw,24px);
  font-weight:900;
  letter-spacing:-.015em;
  color:var(--qb-white);
}
.qb-lead{
  font-size:clamp(15px,1.3vw,17px);
  line-height:1.75;
  color:var(--qb-mist);
  max-width:62ch;
}
.qb-index{
  display:inline-block;
  font-family:var(--qb-mono);
  font-size:12px;
  font-weight:500;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--qb-cyan);
}
.qb-index--muted{color:var(--qb-mist);}
.qb-num{
  font-family:var(--qb-mono);
  font-weight:700;
  font-variant-numeric:tabular-nums;
  letter-spacing:.01em;
}
.qb-muted{color:var(--qb-mist);}
.qb-rule{height:1px;border:0;margin:0;background:var(--qb-line);}

/* ---------- 4. 布局容器 ---------- */
.qb-container{
  width:100%;
  max-width:var(--qb-max);
  margin-inline:auto;
  padding-inline:var(--qb-gutter);
}
.qb-main{display:block;}
.qb-section{padding-block:clamp(46px,6.4vw,92px);}
.qb-section--first{padding-top:calc(var(--qb-header-h) + clamp(38px,6.4vw,84px));}
.qb-section--tight{padding-block:clamp(26px,3.6vw,46px);}

.qb-grid{display:grid;gap:clamp(14px,1.8vw,24px);}
.qb-grid--2{grid-template-columns:repeat(2,minmax(0,1fr));}
.qb-grid--3{grid-template-columns:repeat(3,minmax(0,1fr));}
.qb-grid--4{grid-template-columns:repeat(4,minmax(0,1fr));}
.qb-grid--rail{grid-template-columns:240px minmax(0,1fr) 320px;align-items:start;}

/* ---------- 5. 跳转链接 ---------- */
.qb-skip{
  position:fixed;
  top:8px;
  left:8px;
  z-index:200;
  padding:10px 16px;
  background:var(--qb-cyan);
  color:#04121A;
  font-size:14px;
  font-weight:700;
  border-radius:2px;
  transform:translateY(-160%);
  transition:transform .18s var(--qb-speed);
}
.qb-skip:focus{transform:translateY(0);}

/* ---------- 6. 头部 ---------- */
.qb-header{
  position:fixed;
  top:0;
  left:0;
  right:0;
  z-index:100;
  background-color:transparent;
  border-bottom:1px solid transparent;
  transition:background-color .2s var(--qb-speed),border-color .2s var(--qb-speed);
}
.qb-header[data-scrolled="true"]{
  background-color:rgba(7,12,24,.94);
  border-bottom-color:var(--qb-line);
}
.qb-header__rule{
  position:absolute;
  left:0;
  bottom:0;
  width:100%;
  height:2px;
  transform:scaleX(var(--qb-progress,0));
  transform-origin:left center;
  background:linear-gradient(90deg,var(--qb-cyan),var(--qb-orange));
  opacity:0;
  transition:opacity .2s var(--qb-speed);
}
.qb-header[data-scrolled="true"] .qb-header__rule{opacity:1;}

.qb-header__inner{
  display:flex;
  align-items:center;
  gap:clamp(12px,2vw,32px);
  min-height:var(--qb-header-h);
}

/* 品牌 */
.qb-brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
  color:var(--qb-white);
  text-decoration:none;
}
.qb-brand__mark{
  width:26px;
  height:26px;
  flex:0 0 auto;
  background:linear-gradient(135deg,var(--qb-cyan),var(--qb-orange));
  clip-path:polygon(0 0,60% 0,100% 50%,60% 100%,0 100%,38% 50%);
  transition:transform .2s var(--qb-speed);
}
.qb-brand:hover .qb-brand__mark{transform:translateX(3px);}
.qb-brand__text{display:flex;flex-direction:column;line-height:1;}
.qb-brand__name{
  font-size:17px;
  font-weight:900;
  letter-spacing:.02em;
  color:var(--qb-white);
}
.qb-brand__tag{
  margin-top:5px;
  font-family:var(--qb-mono);
  font-size:10px;
  font-weight:500;
  letter-spacing:.18em;
  color:var(--qb-cyan);
}
.qb-brand--sm .qb-brand__name{font-size:15.5px;}

/* 导航 */
.qb-nav{
  display:flex;
  align-items:center;
  gap:clamp(12px,2.2vw,40px);
  flex:1 1 auto;
  min-width:0;
}
.qb-nav__list{
  display:flex;
  align-items:center;
  justify-content:center;
  gap:clamp(4px,1.4vw,24px);
  flex:1 1 auto;
}
.qb-nav__link{
  position:relative;
  display:inline-block;
  padding:6px 2px;
  font-size:14.5px;
  font-weight:700;
  letter-spacing:.01em;
  color:var(--qb-mist);
  text-decoration:none;
  transition:color .16s var(--qb-speed);
}
.qb-nav__link:hover{color:var(--qb-white);}
.qb-nav__link[aria-current="page"]{color:var(--qb-white);}
.qb-nav__link[aria-current="page"]::after{
  content:"";
  position:absolute;
  left:0;
  bottom:0;
  width:100%;
  height:2px;
  background:var(--qb-cyan);
}
.qb-actions{
  display:flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
}

/* 汉堡按钮 */
.qb-nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  padding:9px 12px;
  margin-left:auto;
  border:1px solid var(--qb-line);
  background:rgba(14,24,48,.7);
  color:var(--qb-white);
  font-size:13px;
  font-weight:700;
  border-radius:2px;
}
.qb-nav-toggle:hover{border-color:var(--qb-cyan);color:var(--qb-cyan);}
.qb-nav-toggle__box{position:relative;display:block;width:20px;height:14px;}
.qb-nav-toggle__box span{
  position:absolute;
  left:0;
  width:100%;
  height:2px;
  background:currentColor;
  transition:transform .2s var(--qb-speed),opacity .2s var(--qb-speed);
}
.qb-nav-toggle__box span:nth-child(1){top:0;}
.qb-nav-toggle__box span:nth-child(2){top:6px;}
.qb-nav-toggle__box span:nth-child(3){top:12px;}
.qb-nav-toggle[aria-expanded="true"] .qb-nav-toggle__box span:nth-child(1){transform:translateY(6px) rotate(45deg);}
.qb-nav-toggle[aria-expanded="true"] .qb-nav-toggle__box span:nth-child(2){opacity:0;}
.qb-nav-toggle[aria-expanded="true"] .qb-nav-toggle__box span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}
.qb-nav-toggle__label{line-height:1;}

/* ---------- 7. 按钮 ---------- */
.qb-btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:11px 18px;
  border:1px solid var(--qb-line);
  border-radius:2px;
  background:rgba(14,24,48,.6);
  color:var(--qb-white);
  font-size:14px;
  font-weight:700;
  letter-spacing:.02em;
  text-decoration:none;
  white-space:nowrap;
  transition:background-color .16s var(--qb-speed),border-color .16s var(--qb-speed),color .16s var(--qb-speed),transform .12s var(--qb-speed);
}
.qb-btn:hover{transform:translateY(-1px);}
.qb-btn--ghost{
  border-color:rgba(34,227,210,.5);
  color:var(--qb-cyan);
  background:rgba(34,227,210,.06);
}
.qb-btn--ghost:hover{background:rgba(34,227,210,.16);border-color:var(--qb-cyan);}
.qb-btn--primary{
  border-color:transparent;
  background:linear-gradient(120deg,var(--qb-orange),#FF6A00);
  color:#160A02;
}
.qb-btn--primary:hover{background:linear-gradient(120deg,#FFA044,var(--qb-orange));}
.qb-btn--cut{
  clip-path:polygon(0 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%);
}

/* ---------- 8. 标签 / 状态 ---------- */
.qb-label{
  display:inline-flex;
  align-items:center;
  gap:7px;
  font-size:12.5px;
  font-weight:700;
  letter-spacing:.02em;
  color:var(--qb-white);
}
.qb-label::before{
  content:"";
  width:3px;
  height:12px;
  flex:0 0 auto;
  background:var(--qb-cyan);
}
.qb-label--home::before{background:var(--qb-red);}
.qb-label--away::before{background:var(--qb-cyan);}
.qb-label--level::before{background:var(--qb-orange);}
.qb-label--status::before{background:var(--qb-gold);}

.qb-tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:3px 9px;
  border:1px solid var(--qb-line);
  border-radius:1px;
  background:var(--qb-board);
  color:var(--qb-mist);
  font-size:12px;
  font-weight:700;
  letter-spacing:.02em;
}
.qb-tag--cyan{color:var(--qb-cyan);border-color:rgba(34,227,210,.42);}

/* ---------- 9. 卡片 ---------- */
.qb-card{
  position:relative;
  display:block;
  padding:clamp(16px,2.2vw,26px);
  background:var(--qb-board);
  border:1px solid var(--qb-line);
  border-radius:2px;
  box-shadow:var(--qb-shadow);
  color:inherit;
  transition:transform .12s var(--qb-speed),border-color .12s var(--qb-speed),background-color .12s var(--qb-speed);
}
.qb-card--cut{
  clip-path:polygon(0 0,calc(100% - 22px) 0,100% 22px,100% 100%,22px 100%,0 calc(100% - 22px));
}
.qb-card:hover{
  transform:translateY(-3px);
  border-color:rgba(34,227,210,.45);
  background-color:#101B36;
}
.qb-card__head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  margin-bottom:10px;
}
.qb-card__title{
  font-size:clamp(17px,2vw,22px);
  font-weight:900;
  letter-spacing:-.015em;
  color:var(--qb-white);
}
.qb-card__body{font-size:15px;line-height:1.75;color:var(--qb-mist);}
.qb-card__meta{
  display:flex;
  flex-wrap:wrap;
  gap:10px 16px;
  margin-top:14px;
  padding-top:12px;
  border-top:1px solid var(--qb-line);
  font-size:12.5px;
  color:var(--qb-mist);
}

/* ---------- 10. 数据块 ---------- */
.qb-stat{display:flex;flex-direction:column;gap:4px;}
.qb-stat__value{
  font-family:var(--qb-mono);
  font-weight:700;
  font-variant-numeric:tabular-nums;
  font-size:clamp(26px,3.6vw,40px);
  line-height:1.06;
  color:var(--qb-white);
}
.qb-stat__label{font-size:12.5px;letter-spacing:.04em;color:var(--qb-mist);}

/* ---------- 11. 图片容器（页面阶段使用） ---------- */
.qb-media{
  position:relative;
  display:block;
  overflow:hidden;
  aspect-ratio:16 / 9;
  background:linear-gradient(150deg,var(--qb-board),#05080F);
  border:1px solid var(--qb-line);
  border-radius:2px;
}
.qb-media--wide{aspect-ratio:21 / 9;}
.qb-media--square{aspect-ratio:1 / 1;}
.qb-media--tall{aspect-ratio:3 / 4;}
.qb-media > img{
  width:100%;
  height:100%;
  object-fit:cover;
  filter:saturate(.72) contrast(1.06) brightness(.72);
}
.qb-media::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(7,12,24,.05),rgba(7,12,24,.62));
  pointer-events:none;
}
.qb-media--cyan::before{
  content:"";
  position:absolute;
  top:0;
  left:0;
  z-index:2;
  width:64px;
  height:3px;
  background:var(--qb-cyan);
}
.qb-media__cap{
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  z-index:2;
  padding:8px 12px;
  background:rgba(7,12,24,.84);
  border-top:1px solid var(--qb-line);
  color:var(--qb-mist);
  font-size:12px;
  letter-spacing:.02em;
}

/* ---------- 12. 面包屑 ---------- */
.qb-crumbs{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--qb-mist);
}
.qb-crumbs__item{display:inline-flex;align-items:center;gap:8px;}
.qb-crumbs__item + .qb-crumbs__item::before{content:"/";color:rgba(168,182,217,.45);}
.qb-crumbs__link{color:var(--qb-mist);transition:color .16s var(--qb-speed);}
.qb-crumbs__link:hover{color:var(--qb-cyan);}
.qb-crumbs__current{color:var(--qb-white);font-weight:700;}

/* ---------- 13. 目录跟随 ---------- */
.qb-toc{position:sticky;top:calc(var(--qb-header-h) + 24px);}
.qb-toc__list{border-left:1px solid var(--qb-line);}
.qb-toc__item{display:block;}
.qb-toc__link{
  display:flex;
  align-items:baseline;
  gap:10px;
  margin-left:-1px;
  padding:9px 12px;
  border-left:2px solid transparent;
  color:var(--qb-mist);
  font-size:13.5px;
  font-weight:700;
  transition:color .16s var(--qb-speed),border-color .16s var(--qb-speed),background-color .16s var(--qb-speed);
}
.qb-toc__link:hover{color:var(--qb-white);background:rgba(30,43,82,.55);}
.qb-toc__link[aria-current]{
  color:var(--qb-white);
  border-left-color:var(--qb-cyan);
  background:linear-gradient(90deg,rgba(34,227,210,.14),transparent);
}
.qb-toc__index{
  font-family:var(--qb-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--qb-cyan);
}

/* ---------- 14. 页脚 ---------- */
.qb-footer{
  margin-top:clamp(48px,7vw,110px);
  background-color:var(--qb-night);
  border-top:1px solid var(--qb-line);
  color:var(--qb-mist);
}
.qb-footer__inner{padding-block:0;}
.qb-footer__row{
  padding-block:clamp(20px,2.8vw,30px);
  border-bottom:1px solid rgba(22,34,74,.75);
}
.qb-footer__row:last-child{border-bottom:0;}
.qb-footer__row--brand{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:14px clamp(18px,3vw,40px);
}
.qb-footer__phrase{
  flex:1 1 260px;
  min-width:0;
  max-width:none;
  font-size:14.5px;
  color:var(--qb-mist);
}
.qb-footer__icp{
  font-family:var(--qb-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--qb-mist);
  white-space:nowrap;
}
.qb-footer__row--cols{
  display:grid;
  grid-template-columns:1fr 1fr 1.4fr;
  gap:clamp(18px,3vw,48px);
}
.qb-footer__col{min-width:0;}
.qb-footer__col--wide{min-width:0;}
.qb-footer__coltitle{
  margin-bottom:12px;
  font-family:var(--qb-mono);
  font-size:12px;
  font-weight:500;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--qb-cyan);
}
.qb-footer__list{display:grid;gap:8px;}
.qb-footer__list--plain{gap:10px;}
.qb-footer__list--plain li{display:flex;flex-wrap:wrap;gap:4px 12px;}
.qb-footer__link{
  display:inline-block;
  color:var(--qb-mist);
  font-size:14px;
  transition:color .16s var(--qb-speed),transform .16s var(--qb-speed);
}
.qb-footer__link:hover{color:var(--qb-cyan);transform:translateX(2px);}
.qb-footer__k{
  flex:0 0 64px;
  font-size:12.5px;
  letter-spacing:.04em;
  color:rgba(168,182,217,.78);
}
.qb-footer__v{color:var(--qb-white);font-size:14px;word-break:break-all;}
.qb-footer__row--meta{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px 24px;
}
.qb-footer__version{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
  max-width:78ch;
  font-size:13px;
  color:var(--qb-mist);
}
.qb-footer__version-tag{
  padding:2px 8px;
  border:1px solid rgba(34,227,210,.45);
  border-radius:1px;
  font-family:var(--qb-mono);
  font-size:11px;
  font-weight:700;
  letter-spacing:.1em;
  color:var(--qb-cyan);
}
.qb-footer__copy{
  font-family:var(--qb-mono);
  font-size:12px;
  letter-spacing:.04em;
  color:rgba(168,182,217,.8);
  max-width:none;
}

/* ---------- 15. 返回顶部（JS 注入） ---------- */
.qb-backtop{
  position:fixed;
  right:clamp(14px,2.4vw,30px);
  bottom:clamp(14px,2.4vw,30px);
  z-index:90;
  display:inline-flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:3px;
  width:54px;
  height:54px;
  background:rgba(14,24,48,.94);
  border:1px solid var(--qb-line);
  color:var(--qb-cyan);
  clip-path:polygon(0 0,100% 0,100% calc(100% - 12px),calc(100% - 12px) 100%,0 100%);
  opacity:0;
  visibility:hidden;
  transform:translateY(12px);
  transition:opacity .2s var(--qb-speed),transform .2s var(--qb-speed),visibility .2s linear,border-color .16s var(--qb-speed);
}
.qb-backtop[data-visible="true"]{opacity:1;visibility:visible;transform:translateY(0);}
.qb-backtop:hover{border-color:var(--qb-cyan);}
.qb-backtop__arrow{font-size:14px;line-height:1;}
.qb-backtop__text{
  font-family:var(--qb-mono);
  font-size:9px;
  letter-spacing:.16em;
}

/* ---------- 16. 响应式：≤1200 ---------- */
@media (max-width:1200px){
  .qb-grid--rail{grid-template-columns:220px minmax(0,1fr);}
  .qb-grid--4{grid-template-columns:repeat(3,minmax(0,1fr));}
}

/* ---------- 17. 响应式：≤1080（导航折叠） ---------- */
@media (max-width:1080px){
  :root{--qb-header-h:62px;}

  .qb-header[data-scrolled="false"]{
    background-color:rgba(7,12,24,.55);
  }
  .qb-nav-toggle{display:inline-flex;}

  .qb-nav{
    position:fixed;
    top:var(--qb-header-h);
    left:0;
    right:0;
    z-index:99;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    max-height:calc(100vh - var(--qb-header-h));
    overflow-y:auto;
    padding:14px var(--qb-gutter) 26px;
    background-color:#0A1122;
    border-bottom:1px solid var(--qb-line);
    box-shadow:0 26px 44px -28px rgba(0,0,0,.95);
    opacity:0;
    visibility:hidden;
    transform:translateY(-14px);
    pointer-events:none;
    transition:opacity .2s var(--qb-speed),transform .2s var(--qb-speed),visibility .2s linear;
  }
  .qb-nav[data-open="true"]{
    opacity:1;
    visibility:visible;
    transform:translateY(0);
    pointer-events:auto;
  }
  .qb-nav__list{
    flex-direction:column;
    align-items:stretch;
    justify-content:flex-start;
    gap:0;
  }
  .qb-nav__item{display:block;}
  .qb-nav__link{
    display:block;
    padding:14px 10px 14px 12px;
    border-bottom:1px solid rgba(22,34,74,.7);
    font-size:16px;
  }
  .qb-nav__link[aria-current="page"]{
    color:var(--qb-white);
    background:linear-gradient(90deg,rgba(34,227,210,.14),transparent);
  }
  .qb-nav__link[aria-current="page"]::after{
    left:0;
    top:50%;
    bottom:auto;
    width:3px;
    height:16px;
    transform:translateY(-50%);
  }
  .qb-actions{
    flex-wrap:wrap;
    gap:12px;
    margin-top:20px;
    padding-top:18px;
    border-top:1px solid var(--qb-line);
  }
  .qb-actions .qb-btn{flex:1 1 160px;}

  .qb-grid--rail{grid-template-columns:minmax(0,1fr);}
  .qb-toc{position:static;}
  .qb-footer__row--cols{grid-template-columns:1fr 1fr;}
  .qb-footer__col--wide{grid-column:1 / -1;}
}

/* ---------- 18. 响应式：≤820 ---------- */
@media (max-width:820px){
  .qb-grid--3,
  .qb-grid--4{grid-template-columns:repeat(2,minmax(0,1fr));}
  .qb-grid--rail{grid-template-columns:minmax(0,1fr);}
  .qb-footer__row--brand{align-items:flex-start;}
  .qb-footer__phrase{flex-basis:100%;}
}

/* ---------- 19. 响应式：≤560 ---------- */
@media (max-width:560px){
  body{font-size:15px;}
  .qb-grid--2,
  .qb-grid--3,
  .qb-grid--4{grid-template-columns:minmax(0,1fr);}
  .qb-footer__row--cols{grid-template-columns:minmax(0,1fr);}
  .qb-footer__row--meta{flex-direction:column;align-items:flex-start;}
  .qb-actions .qb-btn{flex:1 1 100%;}
  .qb-backtop{width:48px;height:48px;}
}

/* ---------- 20. 无障碍与偏好 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
    scroll-behavior:auto !important;
  }
  .qb-card:hover,
  .qb-btn:hover,
  .qb-brand:hover .qb-brand__mark,
  .qb-footer__link:hover{transform:none;}
}