/* ============================================================
   b—sports 中国区入口 · 共享样式 /assets/site.css
   夜间赛场控制台 + 编辑部目录
   ============================================================ */

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,blockquote,dl,dd,details,summary{margin:0;padding:0}
ul,ol{list-style:none}
img,svg,video{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input,textarea,select{font:inherit}
summary{list-style:none}
summary::-webkit-details-marker{display:none}

/* ---------- tokens ---------- */
:root{
  --deep:#061A13;
  --panel:#0C2A20;
  --panel-lift:#0A2419;
  --line:#1E4A3A;
  --line-soft:rgba(30,74,58,.62);
  --mint:#3DF2B6;
  --amber:#FF8A3D;
  --paper:#F4EBDD;
  --sand:#C9BFAE;
  --ink:#1A1410;
  --rust:#E2542C;
  --aqua:#8FE3D2;

  --rail-w:252px;
  --top-h:46px;
  --content-max:1240px;
  --gutter:20px;

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

  --ease:cubic-bezier(.22,.68,.3,1);
}

/* ---------- base ---------- */
body{
  background:var(--deep);
  color:var(--paper);
  font-family:var(--f-body);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
::selection{background:var(--mint);color:var(--ink)}
:focus-visible{outline:2px solid var(--mint);outline-offset:2px}
a,button,summary{ -webkit-tap-highlight-color:transparent }

.u-mono{font-family:var(--f-mono);font-variant-numeric:tabular-nums;letter-spacing:.02em}
.u-label{font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--sand)}
.u-display{font-family:var(--f-display);font-weight:900;letter-spacing:-.02em;line-height:1.06}

/* ---------- skip link ---------- */
.skip-link{
  position:fixed;top:8px;left:8px;z-index:200;
  padding:9px 16px;
  background:var(--mint);color:var(--ink);
  font-size:13px;font-weight:800;letter-spacing:.02em;
  transform:translateY(-220%);
  transition:transform .16s var(--ease);
}
.skip-link:focus,.skip-link:focus-visible{transform:none}

/* ============================================================
   顶部状态条
   ============================================================ */
.site-header{position:relative;z-index:60}

.status-bar{
  position:fixed;top:0;left:0;right:0;height:var(--top-h);z-index:80;
  background:linear-gradient(180deg,#0A2419 0%,#071C15 100%);
  border-bottom:1px solid var(--line);
  box-shadow:0 1px 0 rgba(61,242,182,.10),0 8px 24px rgba(0,0,0,.35);
}
.status-bar__inner{
  display:flex;align-items:center;gap:16px;
  width:100%;max-width:1680px;margin:0 auto;
  height:100%;padding:0 16px;
}

.status-bar__brand{
  display:inline-flex;align-items:baseline;gap:7px;
  font-family:var(--f-display);font-weight:900;font-size:15px;
  letter-spacing:-.01em;color:var(--paper);white-space:nowrap;
  transition:color .16s var(--ease);
}
.status-bar__brand:hover{color:var(--mint)}
.status-bar__brand-sub{
  font-family:var(--f-mono);font-size:10px;font-weight:600;
  letter-spacing:.14em;text-transform:uppercase;color:var(--mint);opacity:.9;
}

.status-bar__path{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.05em;color:var(--sand);white-space:nowrap;
}
.status-bar__dot{
  width:6px;height:6px;flex:none;background:var(--amber);
  box-shadow:0 0 0 3px rgba(255,138,61,.16);
  animation:ledbreath 7s var(--ease) infinite;
}

.status-bar__meta{margin-inline-start:auto;display:flex;align-items:center;gap:10px}
.status-chip{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 8px;border:1px solid var(--line);
  background:rgba(12,42,32,.72);
  font-size:11px;letter-spacing:.06em;line-height:1.6;
}
.status-chip__k{color:var(--sand);text-transform:uppercase;letter-spacing:.1em;font-size:10px}
.status-chip__v{font-family:var(--f-mono);font-weight:700;color:var(--mint)}
.status-chip__led{
  width:6px;height:6px;flex:none;border-radius:50%;
  background:#44604F;transition:background .2s var(--ease),box-shadow .2s var(--ease);
}
.status-chip[data-online="true"] .status-chip__led{
  background:var(--mint);box-shadow:0 0 8px rgba(61,242,182,.85);
}

.status-bar__cta{min-height:28px;padding:2px 12px;font-size:12px}

/* 滚动进度 */
.scroll-meter{
  position:absolute;left:0;right:0;bottom:-1px;height:2px;
  background:rgba(30,74,58,.5);overflow:hidden;
}
.scroll-meter__bar{
  display:block;width:0;height:100%;
  background:linear-gradient(90deg,var(--mint) 0%,var(--aqua) 55%,var(--amber) 100%);
  transition:width .12s linear;
}

/* 移动导航按钮 */
.nav-toggle{
  display:none;align-items:center;gap:8px;
  padding:6px 9px;border:1px solid var(--line);
  color:var(--paper);font-size:10px;font-weight:700;
  letter-spacing:.14em;text-transform:uppercase;
  transition:border-color .16s var(--ease),color .16s var(--ease);
}
.nav-toggle__bars{display:grid;gap:3px;width:16px}
.nav-toggle__bar{
  display:block;height:2px;width:100%;background:var(--mint);
  transition:transform .22s var(--ease),opacity .16s var(--ease);
}
.nav-toggle__bar:nth-child(2){width:72%}
.nav-toggle:hover{border-color:var(--mint);color:var(--mint)}
.site-header[data-open="true"] .nav-toggle{border-color:var(--mint);color:var(--mint)}
.site-header[data-open="true"] .nav-toggle__bar:nth-child(1){transform:translateY(5px) rotate(45deg);width:100%}
.site-header[data-open="true"] .nav-toggle__bar:nth-child(2){opacity:0}
.site-header[data-open="true"] .nav-toggle__bar:nth-child(3){transform:translateY(-5px) rotate(-45deg);width:100%}

/* ============================================================
   左侧轨道导航
   ============================================================ */
.rail{
  position:fixed;left:0;top:var(--top-h);
  width:var(--rail-w);height:calc(100vh - var(--top-h));
  display:flex;flex-direction:column;
  padding:18px 14px 18px;
  background:linear-gradient(180deg,#08231A 0%,#061A13 62%,#05150F 100%);
  border-right:1px solid var(--line);
  box-shadow:inset -1px 0 0 rgba(61,242,182,.06);
  overflow-y:auto;overscroll-behavior:contain;
  z-index:70;
}
.rail__head{padding:0 4px 14px;border-bottom:1px solid var(--line)}
.rail__kicker{
  font-family:var(--f-mono);font-size:10px;font-weight:600;
  letter-spacing:.2em;text-transform:uppercase;color:var(--mint);opacity:.85;
}
.rail__brand{
  display:block;margin-top:9px;
  font-family:var(--f-display);font-weight:900;font-size:22px;
  line-height:1.04;letter-spacing:-.02em;color:var(--paper);
  transition:color .16s var(--ease);
}
.rail__brand:hover{color:var(--mint)}
.rail__brand-sub{
  display:block;margin-top:7px;
  font-family:var(--f-body);font-size:11px;font-weight:400;
  letter-spacing:.06em;color:var(--sand);
}

.rail__nav-list{display:grid;gap:2px;padding-top:10px}
.rail__nav-item{list-style:none}
.rail__link{
  display:grid;grid-template-columns:26px 1fr;align-items:center;gap:8px;
  padding:8px 10px;border-left:2px solid transparent;
  color:var(--sand);font-size:14px;line-height:1.4;
  transition:color .16s var(--ease),background .16s var(--ease),border-color .16s var(--ease);
}
.rail__num{
  font-family:var(--f-mono);font-size:10px;font-weight:700;
  letter-spacing:.06em;color:#3C6A57;
  transition:color .16s var(--ease);
}
.rail__label{display:block}
.rail__link:hover{color:var(--paper);background:rgba(61,242,182,.07);border-left-color:var(--line-soft)}
.rail__link:hover .rail__num{color:var(--aqua)}
.rail__link[aria-current="page"]{
  color:var(--paper);font-weight:700;border-left-color:var(--mint);
  background:linear-gradient(90deg,rgba(61,242,182,.17) 0%,rgba(61,242,182,0) 92%);
}
.rail__link[aria-current="page"] .rail__num{color:var(--mint)}
.rail__link:focus-visible{outline-offset:-2px}

.rail__group{margin-top:12px;padding-top:10px;border-top:1px solid var(--line)}
.rail__group-sum{
  display:grid;grid-template-columns:14px 1fr auto;align-items:center;gap:8px;
  padding:6px 10px;cursor:pointer;
  font-size:11px;font-weight:600;letter-spacing:.1em;
  text-transform:uppercase;color:var(--sand);
  transition:color .16s var(--ease);
}
.rail__group-sum::before{
  content:"+";font-family:var(--f-mono);font-size:12px;
  color:var(--amber);line-height:1;
}
.rail__group[open] .rail__group-sum::before{content:"–";color:var(--mint)}
.rail__group-sum:hover{color:var(--paper)}
.rail__group-count{
  font-family:var(--f-mono);font-size:10px;letter-spacing:.04em;
  color:var(--sand);border:1px solid var(--line);padding:0 5px;line-height:1.6;
}
.rail__group-list{display:grid;gap:1px;padding:6px 0 4px}
.rail__sublink{
  display:block;position:relative;
  padding:5px 10px 5px 34px;
  font-size:12.5px;color:var(--sand);
  transition:color .16s var(--ease),padding-left .16s var(--ease);
}
.rail__sublink::before{
  content:"·";position:absolute;left:22px;top:5px;
  color:#3C6A57;font-weight:700;
}
.rail__sublink:hover{color:var(--mint);padding-left:37px}

.rail__foot{
  margin-top:auto;padding:14px 10px 2px;
  border-top:1px solid var(--line);display:grid;gap:8px;
}
.rail__cta{width:100%}
.rail__hours{font-size:12px;line-height:1.55;color:var(--sand)}
.rail__hours .u-mono{color:var(--aqua);font-weight:600}
.rail__note{font-size:11px;line-height:1.6;color:var(--sand);opacity:.7}

.rail-veil{display:none}

/* ============================================================
   主区占用（页面阶段使用 .site-main）
   ============================================================ */
.site-main{
  margin-inline-start:var(--rail-w);
  padding-top:var(--top-h);
  min-height:60vh;
}

/* ============================================================
   页脚
   ============================================================ */
.site-footer{
  margin-inline-start:var(--rail-w);
  padding:44px 24px 26px;
  background:linear-gradient(180deg,#0A2419 0%,#061A13 45%,#04120D 100%);
  border-top:1px solid var(--line);
}
.footer-index{
  width:100%;max-width:var(--content-max);margin:0 auto;
  display:grid;grid-template-columns:1.4fr .9fr .9fr 1fr;gap:28px;
}
.footer-brand{display:grid;gap:10px;align-content:start;justify-items:start}
.footer-brand__name{
  font-family:var(--f-display);font-weight:900;font-size:20px;
  letter-spacing:-.02em;line-height:1.1;color:var(--paper);
}
.footer-brand__mark{font-family:var(--f-mono);font-size:13px;color:var(--mint);margin-left:4px}
.footer-brand__note{font-size:12.5px;line-height:1.7;color:var(--sand);max-width:24em}

.footer-col{min-width:0}
.footer-col__title{
  font-size:11px;font-weight:600;letter-spacing:.12em;text-transform:uppercase;
  color:var(--mint);padding-bottom:8px;margin-bottom:11px;
  border-bottom:1px solid var(--line);
}
.footer-list{display:grid;gap:7px}
.footer-link{
  font-size:13.5px;color:var(--sand);line-height:1.5;
  transition:color .16s var(--ease);
}
.footer-link:hover{
  color:var(--paper);
  text-decoration:underline;text-decoration-color:var(--mint);text-underline-offset:4px;
}
.footer-link:focus-visible{outline-offset:3px}

.footer-legal{
  width:100%;max-width:var(--content-max);margin:32px auto 0;
  padding-top:16px;border-top:1px dashed var(--line-soft);
  display:flex;flex-wrap:wrap;gap:6px 24px;
}
.footer-legal__item{
  display:inline-flex;align-items:baseline;gap:7px;
  font-size:11.5px;letter-spacing:.02em;color:var(--sand);
}
.footer-legal__item--wide{flex:1 1 320px}
.footer-legal__k{
  font-family:var(--f-mono);font-size:10px;letter-spacing:.12em;
  text-transform:uppercase;color:rgba(143,227,210,.55);flex:none;
}

/* 回到顶部 */
.to-top{
  position:fixed;right:18px;bottom:18px;z-index:90;
  display:inline-flex;align-items:center;gap:8px;
  padding:9px 13px;
  background:var(--panel);border:1px solid var(--line);
  color:var(--paper);font-family:var(--f-mono);
  font-size:11px;letter-spacing:.12em;text-transform:uppercase;
  opacity:0;transform:translateY(10px);pointer-events:none;
  transition:opacity .2s var(--ease),transform .2s var(--ease),
             border-color .16s var(--ease),color .16s var(--ease);
}
.to-top[data-visible="true"]{opacity:1;transform:none;pointer-events:auto}
.to-top:hover{border-color:var(--mint);color:var(--mint)}
.to-top__glyph{color:var(--mint);font-size:13px;line-height:1}

/* ============================================================
   通用组件
   ============================================================ */
.container{
  width:100%;max-width:var(--content-max);
  margin-inline:auto;padding-inline:24px;
}

.grid{display:grid;gap:var(--gutter)}
.grid--12{grid-template-columns:repeat(12,minmax(0,1fr))}

.panel{
  background:var(--panel);
  border:1px solid var(--line);
  padding:18px;
  position:relative;
}
.panel--paper{
  background:var(--paper);color:var(--ink);
  border-color:rgba(26,20,16,.16);
  box-shadow:0 8px 0 -6px rgba(244,235,221,.14);
}
.panel--paper .u-label,.panel--paper .tag{color:rgba(26,20,16,.62)}

.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:2px 8px;border:1px solid var(--line);
  font-family:var(--f-mono);font-size:11px;font-weight:600;
  letter-spacing:.08em;text-transform:uppercase;color:var(--sand);
  line-height:1.7;
}
.tag--mint{background:var(--mint);border-color:var(--mint);color:var(--ink)}
.tag--amber{background:var(--amber);border-color:var(--amber);color:var(--ink)}
.tag--rust{background:var(--rust);border-color:var(--rust);color:var(--paper)}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:38px;padding:8px 16px;
  border:1px solid var(--line);
  background:transparent;color:var(--paper);
  font-size:14px;font-weight:600;letter-spacing:.02em;
  transition:background .16s var(--ease),color .16s var(--ease),
             border-color .16s var(--ease),transform .16s var(--ease);
}
.btn:hover{border-color:var(--mint);color:var(--mint)}
.btn:active{transform:translateY(1px)}
.btn--primary{
  background:var(--mint);border-color:var(--mint);
  color:var(--ink);font-weight:800;
}
.btn--primary:hover{background:var(--aqua);border-color:var(--aqua);color:var(--ink)}
.btn--ghost{background:rgba(12,42,32,.55);border-color:var(--line);color:var(--paper)}
.btn--ghost:hover{border-color:var(--mint);color:var(--mint)}
.btn--amber{background:var(--amber);border-color:var(--amber);color:var(--ink);font-weight:800}
.btn--amber:hover{background:#FFA063;border-color:#FFA063;color:var(--ink)}
.btn--small{min-height:30px;padding:4px 12px;font-size:12px}

.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-family:var(--f-mono);font-size:11px;
  letter-spacing:.08em;text-transform:uppercase;color:var(--sand);
}
.breadcrumb a{transition:color .16s var(--ease)}
.breadcrumb a:hover{color:var(--mint)}
.breadcrumb__sep{color:var(--line-soft)}

/* 图片容器基础规则（页面阶段放置素材） */
.media{
  position:relative;overflow:hidden;
  aspect-ratio:16/10;
  background:
    linear-gradient(135deg,#0A231A 0%,#0C2A20 55%,#123A2C 100%);
  border:1px solid var(--line);
}
.media--wide{aspect-ratio:21/9}
.media--tall{aspect-ratio:3/4}
.media--square{aspect-ratio:1/1}
.media__img,.media img{
  width:100%;height:100%;object-fit:cover;
  filter:saturate(.72) contrast(1.06) brightness(.92);
  transition:transform .32s var(--ease),filter .32s var(--ease);
}
.media:hover .media__img,.media:hover img{transform:scale(1.02);filter:saturate(.92) contrast(1.04)}
.media__ph{
  position:absolute;inset:0;display:grid;place-items:center;
  font-family:var(--f-mono);font-size:11px;letter-spacing:.16em;
  text-transform:uppercase;color:rgba(201,191,174,.5);
}
.media__label{
  position:absolute;left:0;bottom:0;
  padding:5px 10px;
  background:rgba(6,26,19,.86);
  border-top:1px solid var(--line);border-right:1px solid var(--line);
  font-family:var(--f-mono);font-size:10px;font-weight:600;
  letter-spacing:.12em;text-transform:uppercase;color:var(--mint);
}
.media__scan{
  position:absolute;left:0;right:0;bottom:0;height:1px;
  background:linear-gradient(90deg,transparent,var(--mint),transparent);
  opacity:.55;
}

@keyframes ledbreath{
  0%,100%{opacity:.55}
  50%{opacity:1}
}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width:1279px){
  :root{--rail-w:236px}
  .status-bar__path{display:none}
}

@media (max-width:1023px){
  :root{--top-h:52px;--rail-w:0px}

  .status-bar__inner{gap:12px;padding:0 12px}
  .status-bar__brand{font-size:14px}
  .status-bar__brand-sub{display:none}
  .status-bar__meta{gap:8px}
  .status-chip__k{display:none}

  .nav-toggle{display:inline-flex}

  .rail{
    position:fixed;
    top:var(--top-h);left:0;bottom:0;height:auto;
    width:min(86vw,320px);
    transform:translateX(-102%);
    transition:transform .28s var(--ease);
    box-shadow:28px 0 64px rgba(0,0,0,.58);
    z-index:70;
  }
  .site-header[data-open="true"] .rail{transform:translateX(0)}

  .rail-veil{
    display:block;position:fixed;inset:0;z-index:65;
    background:rgba(3,12,9,.72);
    opacity:0;pointer-events:none;
    transition:opacity .22s var(--ease);
  }
  .rail-veil[data-active="true"]{opacity:1;pointer-events:auto}

  .site-main{margin-inline-start:0}
  .site-footer{margin-inline-start:0;padding:34px 18px 22px}
  .footer-index{grid-template-columns:1fr 1fr;gap:24px}
  .footer-brand{grid-column:1 / -1}
  .to-top{right:12px;bottom:12px;padding:8px 11px}
}

@media (max-width:639px){
  :root{--gutter:14px}
  .container{padding-inline:16px}
  .grid--12{grid-template-columns:repeat(2,minmax(0,1fr))}
  .status-bar__meta .status-chip:first-child{display:none}
  .status-bar__cta{display:none}
  .footer-index{grid-template-columns:1fr;gap:22px}
  .footer-legal{gap:5px 16px;margin-top:24px}
  .footer-legal__item{font-size:11px}
  .to-top{font-size:0;gap:0;padding:10px 12px}
  .to-top__glyph{font-size:14px}
}

@media (min-width:640px) and (max-width:1023px){
  .grid--12{grid-template-columns:repeat(6,minmax(0,1fr))}
}

/* ---------- 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;
  }
}