/* ============================================================
   BOB赛事 — /assets/site.css
   共享外壳：顶部细条 + 左侧轨道导航 + 页脚 + 通用组件
   ============================================================ */

/* ---------- 1. reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,h6,p,ul,ol,li,figure,figcaption,blockquote,dl,dd{margin:0;padding:0}
ul,ol{list-style:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
a{color:inherit;text-decoration:none}
img,svg,video{display:block;max-width:100%}
hr{border:0}
table{border-collapse:collapse;width:100%}

/* ---------- 2. tokens ---------- */
:root{
  --ink-900:#081A17;
  --ink-800:#0E2620;
  --ink-700:#16362F;
  --line:#5C6B6A;
  --line-soft:rgba(92,107,106,.45);
  --line-faint:rgba(92,107,106,.22);
  --text:#E6EDEC;
  --text-2:#AEBAB9;
  --text-3:#7C8A89;
  --signal:#3BF0DC;
  --signal-dim:rgba(59,240,220,.12);
  --home:#FF7A33;
  --away:#4FC3F7;
  --wine:#3A1226;
  --indigo:#1B2140;
  --rail-w:240px;
  --topbar-h:56px;
  --radius:2px;
  --font-sans:'Noto Sans SC','Source Han Sans SC','PingFang SC',system-ui,sans-serif;
  --font-mono:'IBM Plex Mono','JetBrains Mono',ui-monospace,SFMono-Regular,Menlo,monospace;
  --ease:cubic-bezier(.2,.7,.2,1);
  --dur:.32s;
}

/* ---------- 3. 中文排版与基础 ---------- */
body{
  min-height:100vh;
  background:var(--ink-900);
  color:var(--text);
  font-family:var(--font-sans);
  font-size:1rem;
  font-weight:400;
  line-height:1.85;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
p{word-break:break-word}
strong,b{font-weight:800}
::selection{background:var(--signal);color:#04140F}

:focus-visible{outline:2px solid var(--signal);outline-offset:2px}
#main-content{display:block;scroll-margin-top:calc(var(--topbar-h) + 12px)}
#main-content:focus{outline:none}

.visually-hidden{
  position:absolute!important;width:1px;height:1px;margin:-1px;padding:0;
  overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;
}

/* 文字尺度 */
.t-display{font-size:clamp(2.6rem,6vw,5.4rem);line-height:.98;letter-spacing:-.02em;font-weight:900}
.t-h2{font-size:clamp(1.5rem,2.6vw,2.1rem);line-height:1.2;letter-spacing:-.01em;font-weight:800}
.t-h3{font-size:1.125rem;line-height:1.4;font-weight:800}
.t-mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:.75rem;line-height:1.4;letter-spacing:.18em;font-weight:500;color:var(--text-2);
}
.eyebrow::before{content:"";width:24px;height:1px;background:var(--signal);flex:none}
.lead{font-size:clamp(1rem,1.4vw,1.125rem);line-height:1.85;color:var(--text-2);max-width:62ch}
.rule{height:1px;background:var(--line-soft);border:0;margin:0}

/* ---------- 4. 容器与布局 ---------- */
.container{width:100%;max-width:1180px;margin:0 auto;padding:0 20px}
.section{padding:clamp(56px,12vh,132px) 0 0}
.section__head{max-width:62ch;margin-bottom:32px}
.section__head .t-h2{margin-top:14px}
.grid{display:grid;gap:24px;grid-template-columns:1fr}
@media (min-width:720px){
  .grid--2{grid-template-columns:repeat(2,1fr)}
  .grid--3{grid-template-columns:repeat(2,1fr)}
}
@media (min-width:1080px){
  .grid--3{grid-template-columns:repeat(3,1fr)}
}
.split{display:grid;grid-template-columns:1fr;gap:32px}
@media (min-width:900px){
  .split{grid-template-columns:5fr 7fr;gap:48px;align-items:start}
}

/* 正文容器 */
.prose{max-width:68ch}
.prose--tight{max-width:62ch}
.prose p+p{margin-top:1em}
.prose h2{margin-top:2.2em;margin-bottom:.6em;font-size:clamp(1.5rem,2.6vw,2.1rem);line-height:1.2;font-weight:800}
.prose h3{margin-top:1.8em;margin-bottom:.5em;font-size:1.125rem;font-weight:800}
.prose ul{margin-top:1em}
.prose li{position:relative;padding-left:1.15em}
.prose li+li{margin-top:.4em}
.prose li::before{content:"";position:absolute;left:0;top:.85em;width:6px;height:1px;background:var(--signal)}
.prose a{border-bottom:1px solid var(--line);color:var(--text)}
.prose a:hover{border-bottom-color:var(--signal);color:var(--signal)}

/* 面包屑 */
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;padding:18px 0;font-size:.75rem;letter-spacing:.1em;color:var(--text-2)}
.breadcrumb__item{display:inline-flex;align-items:center;gap:8px}
.breadcrumb__sep{color:var(--line)}
.breadcrumb a:hover{color:var(--signal)}

/* ---------- 5. 按钮与标签 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:36px;padding:0 16px;
  border:1px solid var(--line);border-radius:var(--radius);
  background:var(--ink-800);color:var(--text);
  font-size:.8125rem;font-weight:600;letter-spacing:.06em;line-height:1;
  transition:color .2s var(--ease),border-color .2s var(--ease),background-color .2s var(--ease);
}
.btn:hover{border-color:var(--signal);color:var(--signal)}
.btn--ghost{background:transparent;border-color:rgba(59,240,220,.45);color:var(--signal)}
.btn--ghost:hover{background:var(--signal-dim);color:var(--signal)}
.btn--signal{background:var(--signal);border-color:var(--signal);color:#04140F;font-weight:800}
.btn--signal:hover{background:#7CF6E8;border-color:#7CF6E8;color:#04140F}
.btn--block{width:100%}

.tag{
  display:inline-flex;align-items:center;gap:6px;
  min-height:22px;padding:0 8px;border:1px solid var(--line);border-radius:var(--radius);
  font-size:.6875rem;letter-spacing:.14em;line-height:1;color:var(--text-2);
}
.tag--home{border-color:rgba(255,122,51,.6);color:var(--home)}
.tag--away{border-color:rgba(79,195,247,.6);color:var(--away)}
.tag--signal{border-color:rgba(59,240,220,.6);color:var(--signal)}

/* 控球率条 */
.possession{display:flex;gap:2px;height:8px;background:var(--ink-900);border:1px solid var(--line-faint)}
.possession__home{background:var(--home)}
.possession__away{background:var(--away)}

/* ---------- 6. 面板与图文容器 ---------- */
.panel{background:var(--ink-800);border:1px solid var(--line-soft);border-radius:var(--radius);padding:22px}
.panel--wine{background:var(--wine);border-color:rgba(230,237,236,.14)}
.panel--indigo{background:var(--indigo);border-color:rgba(230,237,236,.14)}
.panel__head{
  display:flex;align-items:baseline;justify-content:space-between;gap:16px;
  padding-bottom:12px;margin-bottom:16px;border-bottom:1px solid var(--line-soft);
}
.panel__label{font-size:.6875rem;letter-spacing:.18em;color:var(--text-2);white-space:nowrap}
.panel__title{font-size:1.0625rem;font-weight:800;letter-spacing:.01em}

.img-frame{position:relative;overflow:hidden;border:1px solid var(--line-soft);border-radius:var(--radius);background:var(--ink-800)}
.img-frame::before{
  content:"";position:absolute;inset:0;z-index:1;pointer-events:none;
  background:
    linear-gradient(to right,var(--line-faint) 1px,transparent 1px) 0 0/25% 100%,
    linear-gradient(to bottom,var(--line-faint) 1px,transparent 1px) 0 0/100% 25%;
}
.img-frame>img{width:100%;height:100%;aspect-ratio:16/9;object-fit:cover}
.img-frame--tall>img{aspect-ratio:3/4}
.img-frame--wide>img{aspect-ratio:21/9}
.img-frame__ph{
  width:100%;aspect-ratio:16/9;
  background:
    radial-gradient(circle at 28% 22%,rgba(59,240,220,.18),transparent 58%),
    linear-gradient(135deg,rgba(22,54,47,.9),rgba(14,38,32,.95));
}
.img-frame--tall .img-frame__ph{aspect-ratio:3/4}
.img-frame--wide .img-frame__ph{aspect-ratio:21/9}
.img-frame__caption{
  position:absolute;left:0;bottom:0;z-index:2;
  padding:7px 12px;background:rgba(8,26,23,.86);color:var(--text);
  border-top:1px solid var(--line-soft);border-right:1px solid var(--line-soft);
  font-size:.6875rem;letter-spacing:.14em;line-height:1.5;
}

/* ---------- 7. skip link ---------- */
.skip-link{
  position:absolute;left:12px;top:-64px;z-index:200;
  padding:10px 16px;border-radius:var(--radius);
  background:var(--signal);color:#04140F;
  font-size:.8125rem;font-weight:800;letter-spacing:.06em;
  transition:top .2s var(--ease);
}
.skip-link:focus{top:12px}

/* ---------- 8. 头部：顶部细条 ---------- */
.site-header{position:relative;z-index:60}
.topbar{
  position:sticky;top:0;z-index:60;
  background:rgba(8,26,23,.92);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line-soft);
}
.topbar__inner{
  min-height:var(--topbar-h);
  padding:8px 18px;
  display:flex;align-items:center;justify-content:space-between;gap:14px;
}
.topbar__meta{display:flex;align-items:center;gap:10px;flex:none}

.brand{display:inline-flex;align-items:baseline;gap:10px;min-height:36px;padding:6px 0;min-width:0}
.brand__mark{font-size:1.0625rem;font-weight:900;letter-spacing:.02em;white-space:nowrap}
.brand__sub{font-size:.6875rem;letter-spacing:.18em;color:var(--text-2);white-space:nowrap}

.round-chip{
  display:inline-flex;align-items:center;gap:8px;
  min-height:32px;padding:0 10px;border:1px solid var(--line-soft);border-radius:var(--radius);
  background:var(--ink-800);
}
.round-chip__label{font-size:.6875rem;letter-spacing:.16em;color:var(--text-2);white-space:nowrap}
.round-chip__value{
  font-family:var(--font-mono);font-variant-numeric:tabular-nums;
  font-size:.8125rem;color:var(--signal);white-space:nowrap;
}

/* 阅读进度 */
.progress{position:absolute;left:0;right:0;bottom:-1px;height:2px;background:var(--line-faint);pointer-events:none}
.progress__bar{
  display:block;height:100%;width:100%;background:var(--signal);
  transform:scaleX(0);transform-origin:0 50%;
  box-shadow:0 0 10px rgba(59,240,220,.55);
}

/* 移动导航按钮 */
.nav-toggle{
  display:inline-flex;align-items:center;gap:10px;
  min-height:36px;padding:0 12px;border:1px solid var(--line);border-radius:var(--radius);
  background:var(--ink-800);color:var(--text-2);
  font-size:.75rem;letter-spacing:.1em;line-height:1;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.nav-toggle__bars{display:grid;gap:4px;width:16px;flex:none}
.nav-toggle__bars i{display:block;height:1px;background:var(--signal)}
.nav-toggle__text{white-space:nowrap}
.nav-toggle:hover{color:var(--text);border-color:var(--signal)}
.nav-toggle[aria-expanded="true"]{color:var(--signal);border-color:var(--signal);background:var(--signal-dim)}

/* ---------- 9. 头部：左侧轨道 ---------- */
.rail-scrim{position:fixed;inset:0;z-index:65;background:rgba(4,14,12,.68)}
.rail-scrim[hidden]{display:none}

.rail{
  position:fixed;left:0;top:var(--topbar-h);bottom:0;width:var(--rail-w);z-index:55;
  display:flex;flex-direction:column;gap:26px;
  padding:26px 20px 40px;
  background:var(--ink-800);
  border-right:1px solid var(--line-soft);
  overflow-y:auto;overscroll-behavior:contain;
}
.rail__block{display:flex;flex-direction:column;gap:12px}
.rail__label{font-size:.6875rem;line-height:1.4;letter-spacing:.18em;font-weight:500;color:var(--text-2)}
.rail__hint{font-size:.6875rem;line-height:1.6;color:var(--text-3)}

.rail__toggle{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  width:100%;min-height:32px;padding:0;text-align:left;
}
.rail__chev{
  width:8px;height:8px;flex:none;margin-top:-4px;
  border-right:1px solid var(--signal);border-bottom:1px solid var(--signal);
  transform:rotate(45deg);
  transition:transform .25s var(--ease);
}
.rail__toggle[aria-expanded="false"] .rail__chev{transform:rotate(-45deg);margin-top:0}

.rail-nav{display:flex;flex-direction:column;gap:2px}
.rail-nav__link{
  position:relative;display:flex;align-items:center;gap:10px;
  min-height:44px;padding:0 12px 0 14px;
  border-left:2px solid transparent;
  font-size:.9375rem;font-weight:500;color:var(--text-2);
  transition:color .2s var(--ease),background-color .2s var(--ease),border-color .2s var(--ease);
}
.rail-nav__link::before{
  content:"";width:5px;height:5px;flex:none;background:var(--line);
  transform:rotate(45deg);
  transition:background-color .2s var(--ease),box-shadow .2s var(--ease);
}
.rail-nav__link:hover{color:var(--text);background:rgba(230,237,236,.04)}
.rail-nav__link[aria-current="page"]{
  color:var(--text);font-weight:800;
  border-left-color:var(--signal);
  background:var(--signal-dim);
}
.rail-nav__link[aria-current="page"]::before{background:var(--signal);box-shadow:0 0 8px rgba(59,240,220,.7)}
.rail-nav__link.is-active{color:var(--text)}
.rail-nav__link.is-active::before{background:var(--signal)}

.filter-group{display:flex;flex-wrap:wrap;gap:6px}
.filter-chip{
  min-height:32px;padding:0 10px;
  border:1px solid var(--line);border-radius:var(--radius);background:transparent;
  font-size:.75rem;letter-spacing:.08em;line-height:1;color:var(--text-2);
  transition:color .2s var(--ease),border-color .2s var(--ease),background-color .2s var(--ease);
}
.filter-chip:hover{border-color:var(--signal);color:var(--text)}
.filter-chip[aria-pressed="true"]{background:var(--signal-dim);border-color:var(--signal);color:var(--signal)}

.index-list{display:flex;flex-direction:column;gap:1px}
.index-item{
  position:relative;display:flex;align-items:center;
  min-height:34px;padding:0 8px 0 16px;
  border-left:1px solid var(--line-soft);
  font-family:var(--font-mono);font-variant-numeric:tabular-nums;
  font-size:.8125rem;letter-spacing:.04em;color:var(--text-2);
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.index-item::before{
  content:"";position:absolute;left:-3px;top:50%;width:5px;height:5px;margin-top:-2.5px;
  background:var(--ink-800);border:1px solid var(--line);
  transition:background-color .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.index-item:hover{color:var(--text)}
.index-item[aria-pressed="true"]{color:var(--signal);border-left-color:var(--signal)}
.index-item[aria-pressed="true"]::before{background:var(--signal);border-color:var(--signal);box-shadow:0 0 8px rgba(59,240,220,.7)}

/* ---------- 10. 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(56px,10vh,110px);
  background:var(--ink-700);
  border-top:1px solid var(--line-soft);
}
.site-footer::before{content:"";position:absolute;top:0;left:0;width:88px;height:2px;background:var(--signal)}
.footer__inner{max-width:1180px;margin:0 auto;padding:52px 20px 26px}
.footer__grid{display:grid;grid-template-columns:1fr;gap:34px}
@media (min-width:720px){.footer__grid{grid-template-columns:repeat(2,1fr);gap:34px 32px}}
@media (min-width:1080px){.footer__grid{grid-template-columns:1.5fr 1fr 1fr 1.6fr;gap:40px 32px}}

.footer__brand{display:flex;flex-direction:column;gap:8px}
.footer__brandmark{font-size:1.25rem;font-weight:900;letter-spacing:.02em}
.footer__sub{font-size:.6875rem;letter-spacing:.18em;color:var(--text-2)}
.footer__meta{
  display:flex;flex-wrap:wrap;gap:10px 22px;
  margin-top:6px;padding-top:14px;border-top:1px solid var(--line-soft);
}
.stat{display:flex;align-items:baseline;gap:6px}
.stat__value{font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-size:1.125rem;font-weight:600;color:var(--signal)}
.stat__label{font-size:.6875rem;letter-spacing:.12em;color:var(--text-2)}

.footer__col{display:flex;flex-direction:column;gap:14px}
.footer__title{font-size:.6875rem;font-weight:500;letter-spacing:.2em;color:var(--text-2)}
.footer__list{display:flex;flex-direction:column;gap:6px}
.footer__list--plain{gap:10px}
.footer__link{
  display:inline-flex;align-items:center;gap:8px;
  min-height:28px;font-size:.9375rem;color:var(--text);
  transition:color .2s var(--ease);
}
.footer__link::before{
  content:"";width:14px;height:1px;flex:none;background:var(--signal);
  transform:scaleX(0);transform-origin:left;
  transition:transform .22s var(--ease);
}
.footer__link:hover{color:var(--signal)}
.footer__link:hover::before{transform:scaleX(1)}

.contact-line{display:flex;align-items:baseline;gap:10px}
.contact-line__key{flex:none;width:2.6em;font-size:.6875rem;letter-spacing:.14em;color:var(--text-2)}
.contact-line__val{
  font-family:var(--font-mono);font-variant-numeric:tabular-nums;
  font-size:.8125rem;line-height:1.7;color:var(--text);word-break:break-all;
}
.footer__note{margin-top:2px;max-width:46ch;font-size:.75rem;line-height:1.75;color:var(--text-2)}

.footer__bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px 24px;
  margin-top:42px;padding-top:18px;border-top:1px solid var(--line-soft);
}
.footer__legal{font-size:.75rem;letter-spacing:.06em;color:var(--text-2)}
.footer__legal--dim{color:var(--text-3)}
.footer__legal [data-year]{font-family:var(--font-mono);font-variant-numeric:tabular-nums}

/* ---------- 11. 显现动效 ---------- */
.reveal{transition:opacity var(--dur) var(--ease),transform var(--dur) var(--ease)}
.has-js .reveal{opacity:0;transform:translateY(12px)}
.has-js .reveal.is-visible{opacity:1;transform:none}

/* ---------- 12. 断点 ---------- */
@media (max-width:599px){
  .brand__sub{display:none}
}
@media (max-width:419px){
  .nav-toggle__text{display:none}
  .nav-toggle{padding:0 10px}
}
@media (max-width:719px){
  .round-chip{display:none}
}
@media (min-width:1080px){
  body{padding-left:var(--rail-w)}
  .nav-toggle{display:none}
  .rail-scrim{display:none}
  .topbar__inner{padding:8px 32px}
  .container{padding:0 32px}
}
@media (max-width:1079px){
  .rail{
    top:0;width:min(322px,86vw);z-index:70;
    padding-top:76px;
    transform:translateX(-100%);
    transition:transform .3s var(--ease);
    box-shadow:24px 0 60px rgba(0,0,0,.5);
  }
  .rail[data-open="true"]{transform:none}
}

/* ---------- 13. 偏好与无障碍 ---------- */
@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-js .reveal{transform:none}
  .rail{transition:none}
}