/* ============================================================
   BSPORTS赛事 · Site Kit /assets/site.css
   共享外壳：品牌轨道 + 叠加导航 + 赛事说明牌页脚
   ============================================================ */
:root{
  --bs-ink:#050B18;
  --bs-navy:#0C1C33;
  --bs-panel:#12294A;
  --bs-steel:#2E4A70;
  --bs-silver:#A9B8CC;
  --bs-paper:#F1F5FA;
  --bs-signal:#35F0A0;
  --bs-signal-deep:#0E9E6B;
  --bs-live:#FF6A2B;
  --bs-amber:#FFB489;
  --bs-rail:84px;
  --bs-bar:76px;
  --bs-max:1340px;
  --bs-gutter:clamp(18px,4vw,64px);
  --bs-gap:clamp(16px,2vw,28px);
  --bs-section:clamp(64px,9vw,112px);
  --bs-ease:cubic-bezier(.22,.8,.2,1);
  --bs-mono:ui-monospace,"JetBrains Mono","IBM Plex Mono",SFMono-Regular,Menlo,Consolas,monospace;
  --bs-sans:"HarmonyOS Sans SC","Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --bs-progress:0;
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--bs-sans);
  font-size:16px;
  line-height:1.75;
  font-weight:400;
  color:var(--bs-paper);
  background:
    radial-gradient(circle at 92% -8%,rgba(53,240,160,.10),transparent 46%),
    radial-gradient(circle at 4% 42%,rgba(255,106,43,.07),transparent 40%),
    var(--bs-ink);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
h1,h2,h3,h4,h5,h6,p,figure,blockquote{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
a{color:inherit;text-decoration:none;}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer;}
img,svg{display:block;max-width:100%;}
table{border-collapse:collapse;width:100%;}
:focus-visible{outline:2px solid var(--bs-signal);outline-offset:3px;border-radius:2px;}
::selection{background:var(--bs-signal);color:var(--bs-ink);}

@media (min-width:1024px){
  body{padding-left:var(--bs-rail);}
}

/* ---------- 中文排版基础 ---------- */
h1,h2,h3,h4{font-weight:300;line-height:1.12;letter-spacing:.01em;}
p{text-wrap:pretty;}
strong{font-weight:600;color:#fff;}

/* ---------- 工具类 ---------- */
.bs-mono{font-family:var(--bs-mono);font-variant-numeric:tabular-nums;letter-spacing:.04em;}
.bs-container{width:100%;max-width:var(--bs-max);margin:0 auto;padding-inline:var(--bs-gutter);}
.bs-main{display:block;min-height:60vh;}
.bs-main--offset{padding-top:calc(var(--bs-bar) + 40px);}
.bs-section{padding-block:var(--bs-section);}
.bs-section__head{display:flex;flex-wrap:wrap;align-items:flex-end;gap:16px 32px;margin-bottom:clamp(28px,4vw,52px);}
.bs-display{
  font-size:clamp(2.6rem,6vw,5.6rem);
  font-weight:200;
  line-height:.98;
  letter-spacing:-.015em;
  color:var(--bs-paper);
}
.bs-lede{
  font-size:clamp(.95rem,1.4vw,1.06rem);
  line-height:1.8;
  color:var(--bs-silver);
  max-width:56ch;
}
.bs-index{
  font-family:var(--bs-mono);
  font-size:11px;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--bs-signal);
}
.bs-tag{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:5px 12px;
  font-family:var(--bs-mono);
  font-size:11px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--bs-silver);
  border:1px solid var(--bs-steel);
  background:rgba(18,41,74,.55);
  clip-path:polygon(0 6px,6px 0,100% 0,100% 100%,0 100%);
}
.bs-tag::before{
  content:"";
  width:6px;height:6px;
  background:var(--bs-signal);
  clip-path:polygon(0 0,100% 0,100% 100%,0 100%);
}

/* ---------- 跳转链接 ---------- */
.bs-skip{
  position:fixed;
  top:10px;
  left:12px;
  z-index:200;
  padding:11px 20px;
  font-size:13px;
  font-weight:600;
  color:var(--bs-ink);
  background:var(--bs-signal);
  clip-path:polygon(0 0,100% 0,100% calc(100% - 12px),calc(100% - 12px) 100%,0 100%);
  transform:translateY(-180%);
  transition:transform .2s var(--bs-ease);
}
.bs-skip:focus{transform:translateY(0);}
@media (min-width:1024px){
  .bs-skip{left:calc(var(--bs-rail) + 16px);}
}

/* ---------- 品牌轨道 ---------- */
.bs-rail{display:none;}
@media (min-width:1024px){
  .bs-rail{
    position:fixed;
    inset:0 auto 0 0;
    width:var(--bs-rail);
    z-index:120;
    display:flex;
    flex-direction:column;
    align-items:center;
    justify-content:space-between;
    padding:22px 0 26px;
    background:linear-gradient(180deg,#081222 0%,#050B18 62%,#081222 100%);
    border-right:1px solid rgba(46,74,112,.55);
  }
  .bs-rail__word{
    writing-mode:vertical-rl;
    font-family:var(--bs-mono);
    font-size:10px;
    letter-spacing:.42em;
    text-transform:uppercase;
    color:var(--bs-silver);
  }
  .bs-rail__meter{
    position:relative;
    flex:1 1 auto;
    width:1px;
    margin:22px 0;
    background:rgba(46,74,112,.65);
  }
  .bs-rail__meter::after{
    content:"";
    position:absolute;
    left:-1px;
    top:0;
    width:3px;
    height:calc(var(--bs-progress) * 100%);
    background:var(--bs-signal);
    box-shadow:0 0 12px rgba(53,240,160,.55);
  }
  .bs-rail__marks{display:flex;flex-direction:column;gap:14px;}
  .bs-rail__mark{
    width:6px;height:6px;
    background:transparent;
    border:1px solid var(--bs-steel);
    transform:rotate(45deg);
  }
  .bs-rail__mark:first-child{background:var(--bs-signal);border-color:var(--bs-signal);}
}

/* ---------- 顶部导航 ---------- */
.bs-header{
  position:fixed;
  top:0;right:0;left:0;
  z-index:130;
  background:transparent;
  transition:background-color .24s var(--bs-ease),box-shadow .24s var(--bs-ease);
}
@media (min-width:1024px){
  .bs-header{left:var(--bs-rail);}
}
.bs-header::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:0;
  height:1px;
  background:linear-gradient(90deg,rgba(46,74,112,0),rgba(46,74,112,.85),rgba(46,74,112,0));
  opacity:.9;
}
.bs-header.is-scrolled{
  background:rgba(5,11,24,.95);
  box-shadow:0 14px 34px rgba(0,0,0,.45);
  backdrop-filter:blur(10px);
}
.bs-header__bar{
  display:flex;
  align-items:center;
  gap:clamp(10px,2vw,28px);
  height:var(--bs-bar);
  padding-inline:clamp(16px,2.6vw,36px);
}
@media (min-width:1024px){
  .bs-header.is-scrolled .bs-header__bar{height:64px;}
}

/* 品牌锁定组合 */
.bs-brand{display:inline-flex;align-items:center;gap:12px;flex:0 0 auto;}
.bs-brand__mark{
  position:relative;
  width:26px;height:26px;
  flex:0 0 auto;
  background:linear-gradient(140deg,var(--bs-signal),var(--bs-signal-deep));
  clip-path:polygon(0 0,100% 0,100% 66%,66% 100%,0 100%);
}
.bs-brand__mark::after{
  content:"";
  position:absolute;
  inset:6px 6px 7px 6px;
  background:var(--bs-ink);
  clip-path:polygon(0 0,100% 0,100% 100%,0 100%);
}
.bs-brand__text{display:flex;flex-direction:column;line-height:1.1;}
.bs-brand__name{
  font-family:var(--bs-mono);
  font-size:14px;
  font-weight:700;
  letter-spacing:.2em;
  color:var(--bs-paper);
}
.bs-brand__sub{
  font-size:10px;
  letter-spacing:.1em;
  color:var(--bs-silver);
  margin-top:2px;
}
@media (max-width:420px){
  .bs-brand__sub{display:none;}
}

/* 主导航（桌面） */
.bs-nav{display:flex;align-items:center;gap:clamp(12px,1.8vw,26px);margin-left:auto;}
.bs-nav__link{
  position:relative;
  display:inline-flex;
  align-items:baseline;
  gap:5px;
  padding:9px 1px;
  font-size:13.5px;
  letter-spacing:.02em;
  color:var(--bs-silver);
  white-space:nowrap;
  transition:color .2s var(--bs-ease);
}
.bs-nav__num{
  font-family:var(--bs-mono);
  font-size:9.5px;
  letter-spacing:.1em;
  color:var(--bs-steel);
  transition:color .2s var(--bs-ease);
}
.bs-nav__link::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:1px;
  height:2px;
  background:var(--bs-signal);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .3s var(--bs-ease);
}
.bs-nav__link:hover{color:#fff;}
.bs-nav__link:hover::after{transform:scaleX(1);}
.bs-nav__link[aria-current="page"]{color:#fff;}
.bs-nav__link[aria-current="page"] .bs-nav__num{color:var(--bs-signal);}
.bs-nav__link[aria-current="page"]::after{transform:scaleX(1);}

/* 快捷入口 */
.bs-quick{display:none;}
@media (min-width:1240px){
  .bs-quick{
    display:flex;
    align-items:center;
    gap:14px;
    padding-left:clamp(12px,1.6vw,22px);
    border-left:1px solid rgba(46,74,112,.7);
  }
  .bs-quick__link{
    font-family:var(--bs-mono);
    font-size:11px;
    letter-spacing:.16em;
    color:var(--bs-silver);
    padding:4px 0;
    border-bottom:1px solid transparent;
    transition:color .2s var(--bs-ease),border-color .2s var(--bs-ease);
  }
  .bs-quick__link:hover{color:var(--bs-signal);border-color:var(--bs-signal);}
}

.bs-header__actions{display:flex;align-items:center;gap:10px;margin-left:auto;}
@media (min-width:1240px){
  .bs-header__actions{margin-left:0;}
}

/* 移动导航按钮 */
.bs-navtoggle{
  display:inline-flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:5px;
  width:44px;height:44px;
  border:1px solid var(--bs-steel);
  clip-path:polygon(0 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%);
  transition:border-color .2s var(--bs-ease),background-color .2s var(--bs-ease);
}
.bs-navtoggle:hover{border-color:var(--bs-signal);}
.bs-navtoggle__line{
  display:block;
  width:20px;height:2px;
  background:var(--bs-paper);
  transition:transform .24s var(--bs-ease),opacity .18s var(--bs-ease);
}
.bs-header[data-open="true"] .bs-navtoggle{
  border-color:var(--bs-signal);
  background:rgba(53,240,160,.10);
}
.bs-header[data-open="true"] .bs-navtoggle__line:nth-child(1){transform:translateY(7px) rotate(45deg);}
.bs-header[data-open="true"] .bs-navtoggle__line:nth-child(2){opacity:0;}
.bs-header[data-open="true"] .bs-navtoggle__line:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* 阅读进度 */
.bs-progress{
  position:relative;
  height:2px;
  width:100%;
  background:rgba(46,74,112,.45);
  overflow:hidden;
}
.bs-progress__bar{
  display:block;
  height:100%;
  width:calc(var(--bs-progress) * 100%);
  background:linear-gradient(90deg,var(--bs-signal-deep),var(--bs-signal));
  transition:width .12s linear;
}

/* ---------- 移动端导航面板 ---------- */
@media (max-width:1023px){
  :root{--bs-bar:60px;}
  .bs-header__cta{display:none;}
  .bs-header__actions{margin-left:auto;}
  .bs-nav{
    position:fixed;
    left:0;right:0;
    top:var(--bs-bar);
    bottom:0;
    margin-left:0;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding:18px var(--bs-gutter) 110px;
    background:
      linear-gradient(180deg,rgba(12,28,51,.98),rgba(5,11,24,.99));
    border-top:1px solid rgba(46,74,112,.6);
    overflow-y:auto;
    opacity:0;
    visibility:hidden;
    pointer-events:none;
    transform:translateY(-14px);
    transition:opacity .26s var(--bs-ease),transform .26s var(--bs-ease),visibility .26s linear;
  }
  .bs-header[data-open="true"] .bs-nav{
    opacity:1;
    visibility:visible;
    pointer-events:auto;
    transform:translateY(0);
  }
  .bs-nav__link{
    display:flex;
    align-items:baseline;
    gap:12px;
    padding:16px 2px;
    font-size:17px;
    color:var(--bs-paper);
    border-bottom:1px solid rgba(46,74,112,.45);
  }
  .bs-nav__link::after{display:none;}
  .bs-nav__link[aria-current="page"]{color:var(--bs-signal);}
  .bs-nav__link[aria-current="page"] .bs-nav__num{color:var(--bs-signal);}
  .bs-nav__num{font-size:11px;color:var(--bs-steel);}
  body.bs-nav-open{overflow:hidden;}
}

/* ---------- 按钮 ---------- */
.bs-btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  padding:14px 24px;
  font-size:14px;
  font-weight:600;
  letter-spacing:.03em;
  color:var(--bs-paper);
  border:1px solid var(--bs-steel);
  background:rgba(18,41,74,.35);
  clip-path:polygon(0 0,100% 0,100% calc(100% - 12px),calc(100% - 12px) 100%,0 100%);
  transition:background-color .22s var(--bs-ease),color .22s var(--bs-ease),border-color .22s var(--bs-ease),transform .22s var(--bs-ease);
}
.bs-btn:hover{transform:translateY(-2px);}
.bs-btn--sm{padding:9px 16px;font-size:12.5px;letter-spacing:.06em;}
.bs-btn--signal{background:var(--bs-signal);border-color:var(--bs-signal);color:var(--bs-ink);font-weight:700;}
.bs-btn--signal:hover{background:#fff;border-color:#fff;}
.bs-btn--ghost{background:transparent;}
.bs-btn--ghost:hover{border-color:var(--bs-signal);color:var(--bs-signal);}

/* ---------- 面包屑 ---------- */
.bs-breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-family:var(--bs-mono);
  font-size:11px;
  letter-spacing:.12em;
  color:var(--bs-steel);
  padding-block:18px 0;
}
.bs-breadcrumb__item{display:inline-flex;align-items:center;gap:8px;}
.bs-breadcrumb__link{color:var(--bs-silver);transition:color .2s var(--bs-ease);}
.bs-breadcrumb__link:hover{color:var(--bs-signal);}
.bs-breadcrumb__sep{color:var(--bs-steel);}
.bs-breadcrumb [aria-current="page"]{color:var(--bs-paper);}

/* ---------- 网格 ---------- */
.bs-grid{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:var(--bs-gap);
}
.bs-span-4,.bs-span-5,.bs-span-7,.bs-span-8,.bs-span-12{grid-column:1 / -1;}
@media (min-width:760px){
  .bs-span-4{grid-column:span 4;}
  .bs-span-5{grid-column:span 5;}
  .bs-span-7{grid-column:span 7;}
  .bs-span-8{grid-column:span 8;}
}
@media (min-width:1024px){
  .bs-span-7{grid-column:span 7;}
  .bs-span-4{grid-column:span 4;}
}

/* ---------- 切角面板 ---------- */
.bs-panel{
  position:relative;
  padding:clamp(20px,3vw,34px);
  background:linear-gradient(150deg,var(--bs-panel),rgba(12,28,51,.92));
  color:var(--bs-paper);
  clip-path:polygon(0 22px,22px 0,100% 0,100% calc(100% - 22px),calc(100% - 22px) 100%,0 100%);
  transition:background-color .24s var(--bs-ease);
}
.bs-panel::before{
  content:"";
  position:absolute;
  left:0;top:0;
  width:2px;height:0;
  background:var(--bs-signal);
  transition:height .3s var(--bs-ease);
}
.bs-panel:hover::before{height:100%;}

/* ---------- 图片容器（页面阶段放占位） ---------- */
.bs-figure{
  position:relative;
  overflow:hidden;
  border-radius:18px;
  background:
    radial-gradient(circle at 78% 18%,rgba(53,240,160,.14),transparent 55%),
    linear-gradient(135deg,var(--bs-navy),var(--bs-panel));
  aspect-ratio:16 / 10;
  isolation:isolate;
}
.bs-figure img{
  width:100%;height:100%;
  object-fit:cover;
  display:block;
}
.bs-figure--cut{
  border-radius:0;
  clip-path:polygon(0 0,100% 0,100% 88%,88% 100%,0 100%);
}
.bs-figure--wide{aspect-ratio:21 / 9;}
.bs-figure__caption{
  position:absolute;
  left:0;bottom:0;
  padding:8px 14px;
  font-family:var(--bs-mono);
  font-size:10.5px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--bs-paper);
  background:rgba(5,11,24,.78);
}

/* ---------- 横幅主题带 ---------- */
.bs-band{
  position:relative;
  padding-block:clamp(22px,3.4vw,38px);
  background:var(--bs-navy);
  border-block:1px solid rgba(46,74,112,.7);
  overflow:hidden;
}
.bs-band::after{
  content:"";
  position:absolute;
  inset:0;
  background:repeating-linear-gradient(115deg,transparent 0 22px,rgba(169,184,204,.06) 22px 23px);
  pointer-events:none;
}

/* ---------- 页脚 ---------- */
.bs-footer{
  position:relative;
  margin-top:clamp(48px,7vw,96px);
  padding-top:clamp(56px,7vw,92px);
  background:linear-gradient(180deg,var(--bs-navy),#070F1E 88%);
  border-top:1px solid rgba(46,74,112,.7);
  color:var(--bs-silver);
  overflow:hidden;
}
.bs-footer::before{
  content:"";
  position:absolute;
  top:0;left:0;right:0;
  height:2px;
  background:linear-gradient(90deg,var(--bs-signal) 0 120px,rgba(46,74,112,.8) 120px 100%);
}
.bs-footer__glow{
  position:absolute;
  right:-180px;top:-260px;
  width:560px;height:560px;
  background:radial-gradient(circle,rgba(53,240,160,.14),transparent 66%);
  pointer-events:none;
}
.bs-footer__inner{
  position:relative;
  display:grid;
  gap:clamp(32px,5vw,64px);
  grid-template-columns:1fr;
}
@media (min-width:900px){
  .bs-footer__inner{grid-template-columns:minmax(240px,1fr) minmax(0,1.7fr);}
}
.bs-footer__logo{
  font-family:var(--bs-mono);
  font-size:clamp(1.4rem,2.6vw,1.9rem);
  font-weight:700;
  letter-spacing:.16em;
  color:var(--bs-paper);
  line-height:1;
}
.bs-footer__logo span{
  font-family:var(--bs-sans);
  font-size:.62em;
  font-weight:300;
  letter-spacing:.16em;
  color:var(--bs-signal);
  margin-left:8px;
}
.bs-footer__desc{
  margin-top:14px;
  font-size:14px;
  line-height:1.7;
  color:var(--bs-silver);
  max-width:34ch;
}
.bs-footer__note{
  margin-top:14px;
  padding-top:14px;
  border-top:1px solid rgba(46,74,112,.6);
  font-size:12.5px;
  line-height:1.75;
  color:rgba(169,184,204,.8);
  max-width:38ch;
}
.bs-footer__cols{
  display:grid;
  gap:clamp(24px,3vw,40px);
  grid-template-columns:repeat(auto-fit,minmax(150px,1fr));
}
.bs-footer__coltitle{
  font-family:var(--bs-mono);
  font-size:11px;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--bs-signal);
  margin-bottom:6px;
}
.bs-footer__link{
  display:block;
  padding:7px 0;
  font-size:14px;
  color:var(--bs-silver);
  transition:color .2s var(--bs-ease),transform .2s var(--bs-ease);
}
.bs-footer__link:hover{color:#fff;transform:translateX(4px);}
.bs-footer__text{
  padding:7px 0;
  font-size:13.5px;
  line-height:1.65;
  color:var(--bs-silver);
  overflow-wrap:anywhere;
}
.bs-footer__base{
  position:relative;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px 26px;
  margin-top:clamp(40px,6vw,72px);
  padding-block:20px 30px;
  border-top:1px solid rgba(46,74,112,.6);
  font-family:var(--bs-mono);
  font-size:11.5px;
  letter-spacing:.08em;
  color:rgba(169,184,204,.78);
}
.bs-footer__copy,.bs-footer__icp{margin:0;}
.bs-footer__icp{color:var(--bs-silver);}
.bs-footer__legal{
  display:flex;
  flex-wrap:wrap;
  gap:8px 20px;
  margin-left:auto;
}
.bs-footer__legal-link{
  color:var(--bs-silver);
  border-bottom:1px solid rgba(46,74,112,.9);
  padding-bottom:1px;
  transition:color .2s var(--bs-ease),border-color .2s var(--bs-ease);
}
.bs-footer__legal-link:hover{color:var(--bs-signal);border-color:var(--bs-signal);}

/* ---------- 显现动画 ---------- */
[data-reveal]{
  opacity:0;
  transform:translateY(16px);
  transition:opacity .6s var(--bs-ease),transform .6s var(--bs-ease);
  transition-delay:calc(var(--i,0) * 60ms);
  will-change:opacity,transform;
}
[data-reveal].is-revealed{opacity:1;transform:none;}

/* ---------- 可访问性 ---------- */
@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-reveal]{opacity:1;transform:none;transition:none;}
  .bs-btn:hover{transform:none;}
  .bs-footer__link:hover{transform:none;}
}