/* ============================================================
   BSPORT赛事 · 全站共享样式 /assets/site.css
   赛场数据仪表盘 · 堆叠面板 · 红黄牌隐喻
   ============================================================ */

/* ---------- 01 变量 ---------- */
:root{
  --c-navy:#0A1A2F;
  --c-green:#0B3D2E;
  --c-panel:#12233D;
  --c-line:#1E3350;
  --c-red:#E23A2E;
  --c-yellow:#F5C518;
  --c-ok:#4EC9A0;
  --c-ink:#F2F4F7;
  --c-mute:#8A94A6;
  --c-pale:#C9D2E0;

  --bg:var(--c-navy);
  --surface:var(--c-panel);
  --glass:rgba(11,61,46,.42);
  --edge:var(--c-line);

  --text:var(--c-ink);
  --text-2:var(--c-pale);
  --text-3:var(--c-mute);

  --cut-s:6px;
  --cut:12px;
  --cut-l:16px;

  --gap:20px;
  --gap-l:28px;
  --wrap:1180px;
  --head-h:64px;

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

  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ---------- 02 Reset 与基础 ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  min-height:100vh;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  color:var(--text-2);
  background-color:var(--c-navy);
  background-image:
    radial-gradient(1100px 560px at 82% -8%, rgba(226,58,46,.12), transparent 62%),
    radial-gradient(900px 520px at 4% 0%, rgba(11,61,46,.55), transparent 60%),
    repeating-linear-gradient(90deg, rgba(30,51,80,.26) 0 1px, transparent 1px 96px),
    repeating-linear-gradient(0deg, rgba(30,51,80,.16) 0 1px, transparent 1px 96px);
  background-attachment:fixed, fixed, scroll, scroll;
}
img,svg{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit}
h1,h2,h3,h4,h5{margin:0 0 .5em;color:var(--text);font-weight:700;letter-spacing:-.01em;line-height:1.22}
p{margin:0 0 1em}
ul,ol{margin:0 0 1em;padding-left:1.3em}
li{margin:0 0 .35em}
hr{border:0;border-top:1px solid var(--edge);margin:2rem 0}
main{position:relative;z-index:1;display:block}
:focus-visible{outline:2px solid var(--c-yellow);outline-offset:2px}

/* ---------- 03 跳转链接 ---------- */
.skip-link{
  position:absolute;left:16px;top:-72px;z-index:200;
  display:inline-block;padding:11px 16px;
  background:var(--c-yellow);color:var(--c-navy);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;
  transition:top .18s var(--ease);
}
.skip-link:focus{top:12px}

/* ---------- 04 容器与栅格 ---------- */
.container{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 20px}
.container--narrow{max-width:820px}
.grid{display:grid;gap:var(--gap)}
.grid-12{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:var(--gap)}
.col-3{grid-column:span 3}
.col-4{grid-column:span 4}
.col-6{grid-column:span 6}
.col-8{grid-column:span 8}
.col-9{grid-column:span 9}
.col-12{grid-column:span 12}

/* ---------- 05 站点头部 · 紧凑命令栏 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(10,26,47,.86);
  -webkit-backdrop-filter:blur(12px) saturate(140%);
  backdrop-filter:blur(12px) saturate(140%);
  border-bottom:1px solid var(--edge);
  transition:background-color .2s var(--ease), box-shadow .2s var(--ease);
}
.site-header[data-scrolled]{
  background:rgba(7,19,36,.96);
  box-shadow:0 10px 26px rgba(0,0,0,.4);
}
.cmd-bar{
  display:flex;align-items:center;gap:14px;
  max-width:var(--wrap);margin:0 auto;
  min-height:var(--head-h);padding:8px 20px;
}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;min-width:0;color:var(--text)}
.brand-mark{position:relative;display:block;width:28px;height:24px;flex:0 0 auto}
.brand-mark i{
  position:absolute;display:block;width:13px;height:18px;
  clip-path:polygon(0 0,calc(100% - 5px) 0,100% 5px,100% 100%,0 100%);
}
.brand-mark i:first-child{left:0;bottom:0;background:var(--c-red)}
.brand-mark i:last-child{right:0;top:0;background:var(--c-yellow)}
.brand-text{display:flex;flex-direction:column;min-width:0}
.brand-name{font-size:15px;font-weight:800;letter-spacing:.02em;line-height:1.15;color:var(--text);white-space:nowrap}
.brand-sub{
  font-family:var(--font-mono);font-size:10px;letter-spacing:.12em;
  line-height:1.4;color:var(--c-mute);white-space:nowrap;
}
.cmd-nav{flex:1 1 auto;min-width:0}
.nav-list{
  display:flex;align-items:stretch;gap:2px;
  margin:0;padding:0;list-style:none;
  overflow-x:auto;scrollbar-width:none;
}
.nav-list::-webkit-scrollbar{display:none}
.nav-list li{margin:0}
.nav-link{
  display:flex;align-items:baseline;gap:6px;
  padding:9px 10px;white-space:nowrap;
  font-size:14px;color:var(--text-3);
  border-bottom:2px solid transparent;
  transition:color .18s var(--ease), background-color .18s var(--ease), border-color .18s var(--ease);
}
.nav-link:hover{color:var(--text);background:rgba(30,51,80,.55)}
.nav-index{font-family:var(--font-mono);font-size:10px;letter-spacing:.1em;color:var(--c-mute);transition:color .18s var(--ease)}
.nav-label{letter-spacing:.01em}
.nav-link[aria-current="page"]{color:var(--c-yellow);border-bottom-color:var(--c-yellow)}
.nav-link[aria-current="page"] .nav-index{color:var(--c-yellow)}
.nav-link:focus-visible{outline:2px solid var(--c-yellow);outline-offset:-2px}
.head-tools{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.status-chip{
  display:inline-flex;align-items:center;gap:7px;
  padding:5px 10px;white-space:nowrap;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.06em;
  color:var(--c-ok);background:rgba(78,201,160,.09);
  box-shadow:inset 0 0 0 1px rgba(78,201,160,.4);
  clip-path:polygon(0 0,calc(100% - 6px) 0,100% 6px,100% 100%,0 100%);
}
.chip-dot{width:6px;height:6px;border-radius:50%;background:var(--c-ok);box-shadow:0 0 0 3px rgba(78,201,160,.16)}

/* 移动导航按钮 */
.nav-toggle{
  display:none;align-items:center;gap:8px;
  padding:9px 12px;cursor:pointer;
  background:rgba(18,35,61,.92);border:0;color:var(--text);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;
  box-shadow:inset 0 0 0 1px var(--edge);
  clip-path:polygon(0 0,calc(100% - 8px) 0,100% 8px,100% 100%,0 100%);
}
.nav-toggle:hover{color:var(--c-yellow)}
.nav-toggle-bars{position:relative;display:block;width:14px;height:10px}
.nav-toggle-bars::before,.nav-toggle-bars::after{
  content:"";position:absolute;left:0;right:0;height:2px;background:currentColor;
  transition:transform .2s var(--ease);
}
.nav-toggle-bars::before{top:0}
.nav-toggle-bars::after{bottom:0}
[data-nav-toggle][aria-expanded="true"] .nav-toggle-bars::before{transform:translateY(4px) rotate(45deg)}
[data-nav-toggle][aria-expanded="true"] .nav-toggle-bars::after{transform:translateY(-4px) rotate(-45deg)}

/* ---------- 06 按钮 ---------- */
.btn{
  position:relative;
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 18px;border:0;cursor:pointer;
  font-family:var(--font-sans);font-size:14px;font-weight:600;line-height:1;letter-spacing:.02em;
  clip-path:polygon(0 0,calc(100% - 9px) 0,100% 9px,100% 100%,0 100%);
  transition:transform .18s var(--ease), background-color .18s var(--ease), color .18s var(--ease), box-shadow .18s var(--ease);
}
.btn-primary{background:var(--c-red);color:#FFFFFF;box-shadow:inset 0 0 0 1px var(--c-red)}
.btn-primary:hover{background:#C42E23;box-shadow:inset 0 0 0 1px #C42E23;transform:translateY(-2px)}
.btn-ghost{background:transparent;color:var(--text);box-shadow:inset 0 0 0 1px var(--edge)}
.btn-ghost:hover{color:var(--c-yellow);box-shadow:inset 0 0 0 1px var(--c-yellow);transform:translateY(-2px)}
.btn:focus-visible{outline:none;box-shadow:inset 0 0 0 2px var(--c-yellow)}

/* ---------- 07 站点页脚 ---------- */
.site-footer{
  position:relative;z-index:1;
  margin-top:72px;
  border-top:1px solid var(--edge);
  background-image:
    linear-gradient(180deg, rgba(11,61,46,.62) 0%, rgba(10,26,47,.96) 68%),
    repeating-linear-gradient(90deg, rgba(30,51,80,.28) 0 1px, transparent 1px 96px);
  background-color:var(--c-navy);
}
.site-footer::before{
  content:"";position:absolute;left:0;right:0;top:-1px;height:3px;
  background:linear-gradient(90deg,
    var(--c-red) 0 128px,
    var(--c-yellow) 128px 210px,
    rgba(30,51,80,.9) 210px 100%);
}
.foot-inner{
  display:grid;grid-template-columns:minmax(0,4fr) minmax(0,8fr);
  gap:var(--gap-l);
  padding-top:52px;padding-bottom:34px;
}
.foot-brand .brand{margin-bottom:16px}
.foot-note{
  max-width:30em;margin:0 0 20px;
  font-size:13.5px;line-height:1.7;color:var(--c-mute);
}
.foot-contact{margin:0;display:grid;gap:9px}
.foot-contact-row{display:grid;grid-template-columns:74px minmax(0,1fr);gap:10px;align-items:start}
.foot-contact dt{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;
  color:var(--c-mute);padding-top:3px;
}
.foot-contact dd{margin:0;font-size:13.5px;line-height:1.6;color:var(--text-2);word-break:break-all}
.foot-cols{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--gap)}
.foot-title{
  margin:0 0 14px;
  font-family:var(--font-mono);font-size:11px;font-weight:500;
  letter-spacing:.18em;text-transform:uppercase;color:var(--c-mute);
}
.foot-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px}
.foot-list li{margin:0}
.foot-list a{
  display:inline-block;
  padding-left:0;
  font-size:14px;color:var(--text-2);
  border-left:2px solid transparent;
  transition:color .18s var(--ease), border-color .18s var(--ease), padding-left .18s var(--ease);
}
.foot-list a:hover{color:var(--text);border-left-color:var(--c-red);padding-left:8px}
.foot-list a:focus-visible{outline:2px solid var(--c-yellow);outline-offset:2px}
.foot-bottom{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px 28px;
  padding-top:18px;padding-bottom:30px;
  border-top:1px solid var(--edge);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.06em;color:var(--c-mute);
}
.foot-bottom p{margin:0}
.foot-legal{color:var(--c-pale)}

/* ---------- 08 章节与标题体系 ---------- */
.section{padding:clamp(36px,6vw,72px) 0}
.section--tight{padding:24px 0}
.section-head{margin-bottom:var(--gap-l);max-width:64ch}
.eyebrow{
  display:inline-flex;align-items:center;gap:9px;
  margin:0 0 12px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.18em;
  text-transform:uppercase;color:var(--c-mute);
}
.eyebrow::before{content:"";width:20px;height:2px;background:var(--c-red);flex:0 0 auto}
.section-title{font-size:clamp(22px,3.2vw,32px);font-weight:800;letter-spacing:-.02em;margin:0 0 12px}
.section-lead{margin:0;font-size:15.5px;line-height:1.8;color:var(--c-mute);max-width:46em}

/* ---------- 09 堆叠面板 ---------- */
.panel-stack{display:flex;flex-direction:column;gap:var(--gap-l)}
.panel{
  --cut:14px;
  position:relative;
  background:var(--surface);
  box-shadow:inset 0 0 0 1px var(--edge), inset 0 1px 0 rgba(242,244,247,.06);
  clip-path:polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, 0 100%);
}
.panel--glass{
  background:var(--glass);
  -webkit-backdrop-filter:blur(10px) saturate(130%);
  backdrop-filter:blur(10px) saturate(130%);
}
.panel-head{
  display:flex;align-items:center;gap:12px;flex-wrap:wrap;
  padding:12px 18px;
  background:rgba(30,51,80,.36);
  border-bottom:1px solid var(--edge);
}
.panel-num{
  flex:0 0 auto;
  padding:4px 8px;
  font-family:var(--font-mono);font-size:11px;line-height:1;letter-spacing:.14em;
  color:var(--c-navy);background:var(--c-yellow);
  clip-path:polygon(0 0,calc(100% - 5px) 0,100% 5px,100% 100%,0 100%);
}
.panel-title{margin:0;font-size:15px;font-weight:700;color:var(--text)}
.panel-hint{
  margin-left:auto;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;color:var(--c-mute);
}
.panel-body{padding:20px 18px}
.panel-body > :last-child{margin-bottom:0}

/* ---------- 10 卡片 ---------- */
.card{
  --cut:12px;
  position:relative;overflow:hidden;
  padding:16px 18px;
  background:var(--surface);
  box-shadow:inset 0 0 0 1px var(--edge);
  clip-path:polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, 0 100%);
  transition:transform .2s var(--ease), box-shadow .2s var(--ease), background-color .2s var(--ease);
}
.card::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:3px;
  background:var(--c-red);
  transform:scaleY(0);transform-origin:top center;
  transition:transform .2s var(--ease);
}
.card:hover{transform:translateY(-2px);box-shadow:inset 0 0 0 1px rgba(201,210,224,.45)}
.card:hover::before{transform:scaleY(1)}
.card-title{margin:0 0 8px;font-size:15.5px;font-weight:700;color:var(--text)}
.card-meta{
  margin:0;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;color:var(--c-mute);
}

/* ---------- 11 数据与标签 ---------- */
.mono{font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;text-transform:uppercase}
.num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:-.02em}
.num-lg{
  display:block;
  font-family:var(--font-mono);font-variant-numeric:tabular-nums;
  font-size:clamp(28px,4.2vw,44px);font-weight:700;line-height:1;
  letter-spacing:-.03em;color:var(--text);
}
.num-red{color:var(--c-red)}
.stat-list{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:16px}
.stat-list li{margin:0}
.stat{padding:14px 16px;background:rgba(30,51,80,.42);box-shadow:inset 0 0 0 1px var(--edge)}
.stat-value{
  display:block;
  font-family:var(--font-mono);font-variant-numeric:tabular-nums;
  font-size:26px;font-weight:700;line-height:1.1;letter-spacing:-.02em;color:var(--text);
}
.stat-label{
  display:block;margin-top:6px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--c-mute);
}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 9px;
  font-family:var(--font-mono);font-size:11px;line-height:1;letter-spacing:.08em;text-transform:uppercase;
  color:var(--text-2);background:rgba(30,51,80,.75);
  clip-path:polygon(0 0,calc(100% - 6px) 0,100% 6px,100% 100%,0 100%);
}
.tag--red{background:rgba(226,58,46,.16);color:#FF8175;box-shadow:inset 0 0 0 1px rgba(226,58,46,.5)}
.tag--yellow{background:rgba(245,197,24,.14);color:var(--c-yellow);box-shadow:inset 0 0 0 1px rgba(245,197,24,.45)}
.tag--green{background:rgba(78,201,160,.13);color:var(--c-ok);box-shadow:inset 0 0 0 1px rgba(78,201,160,.4)}

/* ---------- 12 图像容器 ---------- */
.media-frame{
  --cut:14px;
  position:relative;display:block;width:100%;overflow:hidden;
  background-color:#0D2038;
  background-image:
    repeating-linear-gradient(90deg, rgba(242,244,247,.07) 0 1px, transparent 1px 56px),
    repeating-linear-gradient(0deg, rgba(242,244,247,.05) 0 1px, transparent 1px 56px),
    radial-gradient(circle at 50% 50%, transparent 0 58px, rgba(242,244,247,.12) 58px 59px, transparent 59px),
    linear-gradient(160deg, rgba(226,58,46,.22), rgba(11,61,46,.55) 48%, rgba(18,35,61,.92));
  box-shadow:inset 0 0 0 1px var(--edge);
  clip-path:polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, 0 100%);
}
.media-frame > img{width:100%;height:100%;object-fit:cover;opacity:.92}
.media-frame--r16-9{aspect-ratio:16 / 9}
.media-frame--r4-3{aspect-ratio:4 / 3}
.media-frame--r1-1{aspect-ratio:1 / 1}
.media-frame--wide{aspect-ratio:21 / 9}
.media-caption{
  display:block;margin-top:9px;
  font-family:var(--font-mono);font-size:11px;line-height:1.6;letter-spacing:.06em;color:var(--c-mute);
}

/* ---------- 13 面包屑与正文 ---------- */
.breadcrumbs{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  padding:18px 0 0;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;
  color:var(--c-mute);
}
.breadcrumbs a{color:var(--text-3);transition:color .18s var(--ease)}
.breadcrumbs a:hover{color:var(--c-yellow)}
.breadcrumbs [aria-current="page"]{color:var(--text-2)}
.crumb-sep{color:var(--c-line)}
.prose{max-width:40em;font-size:16px;line-height:1.75;color:var(--text-2)}
.prose h2{font-size:22px;margin:0 0 .7em}
.prose h3{font-size:17.5px;margin:1.6em 0 .6em}
.prose p{margin:0 0 1.15em}
.prose strong{color:var(--text);font-weight:600}
.prose a{color:var(--c-yellow);text-decoration:underline;text-underline-offset:3px}
.prose ul,.prose ol{padding-left:1.2em}
.prose li{margin-bottom:.5em}
.prose code{
  font-family:var(--font-mono);font-size:.9em;
  padding:2px 6px;background:rgba(30,51,80,.8);color:var(--c-pale);
}
.prose blockquote{
  margin:1.5em 0;padding:14px 18px;
  border-left:3px solid var(--c-yellow);
  background:rgba(30,51,80,.4);
  color:var(--text-2);
}

/* ---------- 14 动效与进度 ---------- */
.has-reveal .reveal{
  opacity:0;transform:translateY(10px);
  transition:opacity .32s var(--ease), transform .32s var(--ease);
}
.has-reveal .reveal.is-visible{opacity:1;transform:none}
.scroll-meter{
  position:fixed;left:0;top:0;z-index:120;
  width:100%;height:2px;
  background:var(--c-red);
  transform:scaleX(0);transform-origin:0 50%;
  pointer-events:none;
}

/* ---------- 15 响应式：平板 ---------- */
@media (max-width:1080px){
  .nav-index{display:none}
  .nav-link{padding:9px 9px;font-size:13.5px}
  .brand-sub{display:none}
}
@media (max-width:1000px){
  .grid-12{gap:16px}
  .col-3,.col-6,.col-8,.col-9{grid-column:span 12}
  .col-4{grid-column:span 6}
  .foot-inner{grid-template-columns:1fr;gap:var(--gap)}
  .foot-cols{grid-template-columns:repeat(3,minmax(0,1fr))}
}

/* ---------- 16 响应式：手机与折叠导航 ---------- */
@media (max-width:900px){
  .cmd-bar{gap:10px;min-height:60px;padding:8px 16px}
  .nav-toggle{display:inline-flex}
  .cmd-nav{
    position:absolute;left:0;right:0;top:100%;
    display:none;
    padding:6px 16px 16px;
    background:rgba(7,19,36,.99);
    border-bottom:1px solid var(--edge);
    box-shadow:0 18px 32px rgba(0,0,0,.45);
    max-height:calc(100vh - 60px);
    overflow-y:auto;
  }
  .site-header[data-open] .cmd-nav{display:block}
  .nav-list{flex-direction:column;gap:0;overflow:visible}
  .nav-link{
    padding:13px 10px;
    font-size:15px;
    border-bottom:1px solid var(--edge);
    border-left:2px solid transparent;
  }
  .nav-link:hover{background:rgba(30,51,80,.5)}
  .nav-index{display:inline}
  .nav-link[aria-current="page"]{
    border-bottom-color:var(--edge);
    border-left-color:var(--c-yellow);
    background:rgba(245,197,24,.07);
    padding-left:14px;
  }
  .status-chip{display:none}
  .head-tools{margin-left:auto}
  .btn{padding:10px 14px;font-size:13.5px}
  .foot-contact-row{grid-template-columns:84px minmax(0,1fr)}
}
@media (max-width:680px){
  body{font-size:15.5px}
  .container{padding:0 16px}
  .col-4,.col-12{grid-column:span 12}
  .grid,.grid-12{gap:14px}
  .panel-head{padding:11px 14px}
  .panel-body{padding:16px 14px}
  .card{padding:14px}
  .foot-cols{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
  .foot-inner{padding-top:40px;padding-bottom:26px}
  .foot-bottom{font-size:10.5px;gap:6px 18px}
  .brand-name{font-size:14px}
  .section-lead{font-size:14.5px}
}
@media (max-width:420px){
  .brand-text{display:none}
  .brand-mark{width:24px;height:20px}
  .brand-mark i{width:11px;height:15px}
}

/* ---------- 17 降低动效偏好 ---------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .has-reveal .reveal{opacity:1;transform:none}
  .card:hover,.btn:hover{transform:none}
  .scroll-meter{display:none}
}