/* =========================================================
   BB体育 · 共享站台样式  /assets/site.css
   结构：令牌 → 重置 → 排版 → 容器 → 外壳 → 组件 → 动效 → 响应
   ========================================================= */

/* ---------- 1. 设计令牌 ---------- */
:root{
  --night:#071B14;
  --court:#0E3B2A;
  --court-mid:#17553B;
  --orange:#FF6B1A;
  --orange-soft:#FF9A4D;
  --score-yellow:#FFD166;
  --nightblue:#1B2A4A;
  --paper:#F1EADA;
  --ink:#F4F6F3;
  --ink-70:rgba(244,246,243,.72);
  --ink-50:rgba(244,246,243,.48);
  --hair:rgba(241,234,218,.14);
  --hair-strong:rgba(241,234,218,.28);
  --deep-ink:#08160F;
  --paper-ink:#0A1A12;

  --font-display:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-body:var(--font-display);
  --font-mono:ui-monospace,"SF Mono",Menlo,Consolas,"DejaVu Sans Mono","Liberation Mono",monospace;

  --shell:1280px;
  --gutter:clamp(16px,4vw,48px);
  --panel-pad:clamp(22px,3.4vw,52px);
  --section-pad:clamp(56px,8vw,124px);
  --radius:2px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ---------- 2. 重置 ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0}
h1,h2,h3,h4,h5,p,ul,ol,li,figure,blockquote,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
img,svg,video{display:block;max-width:100%}
table{border-collapse:collapse;width:100%}
:focus-visible{outline:2px solid var(--score-yellow);outline-offset:3px;border-radius:var(--radius)}
::selection{background:var(--orange);color:var(--deep-ink)}

/* ---------- 3. 中文排版 ---------- */
body{
  background:var(--night);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:clamp(15px,.55vw + 13px,17px);
  line-height:1.85;
  letter-spacing:.012em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
h1,h2,h3,h4{font-family:var(--font-display);font-weight:900;line-height:1.08;letter-spacing:.005em}
h1{font-size:clamp(34px,6vw,68px)}
h2{font-size:clamp(25px,3.6vw,42px)}
h3{font-size:clamp(19px,1.6vw,25px)}
h4{font-size:clamp(16px,1.2vw,19px)}
p{max-width:38em}
strong{font-weight:700;color:var(--score-yellow)}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.02em}
.lead{font-size:clamp(16px,1.2vw,19px);color:var(--ink-70);max-width:34em}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.26em;
  color:var(--orange-soft);text-transform:uppercase;
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--orange)}

/* ---------- 4. 容器与分区 ---------- */
.shell,.container{
  width:min(calc(100% - var(--gutter) * 2),var(--shell));
  margin-inline:auto;
}
.section{padding-block:var(--section-pad)}
.section--tight{padding-block:clamp(36px,5vw,72px)}
.section--court{background:var(--court)}
.section--paper{background:var(--paper);color:var(--paper-ink)}
.section--paper h1,.section--paper h2,.section--paper h3{color:var(--paper-ink)}
.section--paper .eyebrow{color:#8A3A0A}
.section--paper .lead,.section--paper .prose{color:rgba(10,26,18,.78)}

.grid{display:grid;gap:clamp(16px,2.2vw,32px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--4{grid-template-columns:repeat(4,minmax(0,1fr))}

.prose{max-width:38em}
.prose p + p{margin-top:1.05em}
.prose h3{margin-top:1.7em;margin-bottom:.55em}
.prose ul{margin-top:.9em;display:grid;gap:.5em}
.prose li{position:relative;padding-left:1.15em}
.prose li::before{content:"";position:absolute;left:0;top:.72em;width:7px;height:1px;background:var(--orange)}

/* ---------- 5. 跳过链接 ---------- */
.skip-link{
  position:absolute;left:var(--gutter);top:-120px;z-index:300;
  background:var(--score-yellow);color:var(--deep-ink);
  padding:11px 18px;font-weight:700;font-size:14px;
  transition:top .18s var(--ease);
}
.skip-link:focus{top:8px}

/* ---------- 6. 页头 ---------- */
.site-header{
  position:sticky;top:0;z-index:120;
  background:var(--night);
  border-bottom:1px solid var(--hair);
}
.site-header::after{
  content:"";position:absolute;left:0;right:0;bottom:-1px;height:1px;
  background:linear-gradient(90deg,var(--orange) 0 14%,transparent 14% 100%);
  opacity:.75;
}

/* 顶部数据条 */
.scoreline{
  background:var(--court);
  border-bottom:1px solid var(--hair);
  max-height:46px;overflow:hidden;
  transition:max-height .3s var(--ease),opacity .22s var(--ease);
}
.site-header[data-scrolled] .scoreline{max-height:0;opacity:0;border-bottom-color:transparent}
.scoreline__inner{display:flex;align-items:center;gap:clamp(10px,2vw,22px);height:46px}
.scoreline__tag{
  flex:none;display:inline-flex;align-items:center;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.18em;
  background:var(--score-yellow);color:var(--deep-ink);
  padding:4px 10px;
  clip-path:polygon(5px 0,100% 0,100% calc(100% - 5px),calc(100% - 5px) 100%,0 100%,0 5px);
}
.scoreline__feed{flex:1;display:flex;gap:clamp(14px,2.6vw,32px);min-width:0;overflow:hidden}
.scoreline__item{display:inline-flex;align-items:baseline;gap:7px;white-space:nowrap;font-family:var(--font-mono);font-size:12px}
.scoreline__label{color:var(--ink-50)}
.scoreline__value{color:var(--score-yellow)}
.scoreline__link{
  flex:none;font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;
  color:var(--orange-soft);border-bottom:1px solid transparent;transition:color .18s var(--ease),border-color .18s var(--ease);
}
.scoreline__link:hover{color:var(--score-yellow);border-bottom-color:var(--score-yellow)}

/* 主栏 */
.header__bar{
  position:relative;
  display:flex;align-items:center;justify-content:space-between;
  gap:clamp(16px,3vw,40px);
  height:76px;transition:height .26s var(--ease);
}
.site-header[data-scrolled] .header__bar{height:62px}

/* 品牌 */
.brand{display:inline-flex;align-items:center;gap:12px;flex:none}
.brand__mark{
  width:40px;height:40px;display:grid;place-items:center;flex:none;
  background:var(--orange);color:var(--deep-ink);
  font-family:var(--font-display);font-weight:900;font-size:14px;letter-spacing:.02em;
  clip-path:polygon(6px 0,100% 0,100% calc(100% - 6px),calc(100% - 6px) 100%,0 100%,0 6px);
  transition:transform .22s var(--ease);
}
.brand:hover .brand__mark{transform:translateY(-2px)}
.brand__text{display:block}
.brand__name{display:block;font-weight:900;font-size:19px;line-height:1.1;letter-spacing:.02em}
.brand__slogan{
  display:block;margin-top:3px;
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.24em;color:var(--orange-soft);
}
.brand--footer .brand__name{font-size:20px}

/* 移动端按钮 */
.nav-toggle{
  display:none;align-items:center;gap:10px;
  padding:10px 14px;border:1px solid var(--hair-strong);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.14em;color:var(--ink);
  transition:border-color .18s var(--ease),color .18s var(--ease);
}
.nav-toggle:hover{border-color:var(--orange);color:var(--orange-soft)}
.nav-toggle__bars{display:grid;gap:5px;width:18px}
.nav-toggle__bars span{display:block;height:2px;background:var(--orange);transition:transform .22s var(--ease)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:first-child{transform:translateY(3.5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:last-child{transform:translateY(-3.5px) rotate(-45deg)}

/* 导航 */
.site-nav{display:flex;align-items:center}
.site-nav__list{display:flex;align-items:center;gap:clamp(2px,1.2vw,16px)}
.site-nav__item{display:block}
.site-nav__link{
  position:relative;display:inline-flex;align-items:baseline;gap:6px;
  padding:10px 5px;font-size:15px;font-weight:500;color:var(--ink-70);
  transition:color .18s var(--ease);
}
.site-nav__link:hover{color:var(--ink)}
.site-nav__num{font-family:var(--font-mono);font-size:10px;letter-spacing:.1em;color:var(--ink-50);transition:color .18s var(--ease)}
.site-nav__link::after{
  content:"";position:absolute;left:0;right:0;bottom:3px;height:2px;
  background:var(--orange);transform:scaleX(0);transform-origin:left;
  transition:transform .24s var(--ease);
}
.site-nav__link:hover::after{transform:scaleX(1)}
.site-nav__link[aria-current="page"]{color:var(--ink);font-weight:700}
.site-nav__link[aria-current="page"] .site-nav__num{color:var(--orange)}
.site-nav__link[aria-current="page"]::after{transform:scaleX(1)}

/* ---------- 7. 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(64px,9vw,140px);
  background:var(--court);
  border-top:1px solid var(--hair-strong);
}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:3px;
  background:linear-gradient(90deg,var(--orange) 0 20%,var(--score-yellow) 20% 24%,transparent 24% 100%);
}
.footer__grid{
  display:grid;
  grid-template-columns:minmax(0,1.35fr) minmax(0,1fr) minmax(0,1.1fr);
  gap:clamp(26px,4vw,64px);
  padding:clamp(42px,6vw,76px) 0 clamp(28px,4vw,46px);
}
.footer__col{min-width:0}
.footer__col--brand{display:flex;flex-direction:column;align-items:flex-start;gap:16px}
.footer__title{
  font-family:var(--font-mono);font-size:11px;font-weight:500;
  letter-spacing:.26em;color:var(--orange-soft);margin-bottom:16px;
}
.footer__note{font-size:14px;color:var(--ink-70);max-width:30em}
.footer__contact{display:grid;gap:9px;font-family:var(--font-mono);font-size:12.5px;line-height:1.9}
.footer__contact li{display:flex;gap:10px;flex-wrap:wrap}
.footer__key{color:var(--ink-50);min-width:5em}
.footer__val{color:var(--ink)}
.footer__links{display:grid;gap:11px}
.footer__links a{
  font-size:14.5px;color:var(--ink-70);
  border-bottom:1px solid transparent;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.footer__links a:hover{color:var(--orange-soft);border-bottom-color:var(--orange-soft)}
.footer__notice{margin-top:22px;display:grid;gap:10px}
.footer__badge{
  justify-self:start;
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.2em;
  color:var(--deep-ink);background:var(--score-yellow);padding:3px 9px;
}
.footer__notice p{font-size:13.5px;color:var(--ink-70);max-width:26em}
.copy-btn{
  font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;
  padding:9px 16px;border:1px solid var(--hair-strong);color:var(--ink-70);
  transition:border-color .18s var(--ease),color .18s var(--ease),background .18s var(--ease);
}
.copy-btn:hover{border-color:var(--orange);color:var(--orange-soft)}
.copy-btn[data-copied]{background:var(--orange);border-color:var(--orange);color:var(--deep-ink)}
.footer__hint{font-family:var(--font-mono);font-size:11.5px;color:var(--score-yellow);min-height:1.4em;max-width:34em}
.footer__base{
  display:flex;flex-wrap:wrap;gap:10px 28px;justify-content:space-between;align-items:center;
  padding:18px 0;border-top:1px solid var(--hair);
  font-family:var(--font-mono);font-size:12px;color:var(--ink-50);
}

/* ---------- 8. 通用组件 ---------- */
/* 按钮 */
.btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:13px 24px;font-size:15px;font-weight:700;letter-spacing:.02em;
  border:1px solid transparent;white-space:nowrap;
  clip-path:polygon(9px 0,100% 0,100% calc(100% - 9px),calc(100% - 9px) 100%,0 100%,0 9px);
  transition:background .18s var(--ease),color .18s var(--ease),box-shadow .18s var(--ease),transform .18s var(--ease);
}
.btn--primary{background:var(--orange);color:var(--deep-ink)}
.btn--primary:hover{background:var(--orange-soft);transform:translateY(-1px)}
.btn--ghost{color:var(--ink);box-shadow:inset 0 0 0 1px var(--hair-strong)}
.btn--ghost:hover{color:var(--orange-soft);box-shadow:inset 0 0 0 1px var(--orange)}
.btn--paper{background:var(--paper);color:var(--paper-ink)}
.btn--paper:hover{background:#fff8e8}

/* 面包屑 */
.breadcrumb{margin-bottom:clamp(20px,3vw,34px)}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-family:var(--font-mono);font-size:12px;color:var(--ink-50)}
.breadcrumb li+li::before{content:"/";margin-right:10px;color:var(--court-mid)}
.breadcrumb a{color:var(--ink-50);transition:color .18s var(--ease)}
.breadcrumb a:hover{color:var(--orange-soft)}
.breadcrumb [aria-current="page"]{color:var(--orange)}

/* 堆叠面板 */
.panel{
  position:relative;
  background:var(--court);
  border:1px solid var(--hair);
  padding:var(--panel-pad);
  border-radius:var(--radius);
}
.panel--slab{background:var(--court-mid);border-color:transparent}
.panel--paper{background:var(--paper);color:var(--paper-ink);border-color:rgba(10,26,18,.14)}
.panel--paper .eyebrow{color:#8A3A0A}
.panel--paper p{color:rgba(10,26,18,.8)}
.edge-cut{clip-path:polygon(0 0,100% 0,100% calc(100% - 30px),calc(100% - 30px) 100%,0 100%)}
.panel__index{
  position:absolute;top:14px;right:16px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.18em;color:var(--ink-50);
}
.panel--paper .panel__index{color:rgba(10,26,18,.42)}

/* 比分牌信息卡 */
.scorecard{
  display:grid;grid-template-columns:1fr auto 1fr;
  align-items:center;gap:clamp(12px,2.4vw,30px);
  background:var(--nightblue);
  border:1px solid var(--hair);
  padding:clamp(18px,2.6vw,32px);
  transition:transform .2s var(--ease),border-color .2s var(--ease);
}
.scorecard:hover{transform:translateY(-2px);border-color:var(--orange)}
.scorecard__side{display:grid;gap:6px;min-width:0}
.scorecard__side--end{justify-items:end;text-align:right}
.scorecard__value{font-family:var(--font-mono);font-size:clamp(28px,4.6vw,50px);font-weight:700;line-height:1;color:var(--score-yellow)}
.scorecard__label{font-family:var(--font-mono);font-size:11px;letter-spacing:.18em;color:var(--ink-50)}
.scorecard__mid{font-family:var(--font-mono);font-size:12px;letter-spacing:.14em;color:var(--orange);text-align:center}

/* 时间轴 */
.timeline{position:relative;padding-left:28px}
.timeline::before{
  content:"";position:absolute;left:6px;top:8px;bottom:8px;width:1px;
  background:linear-gradient(180deg,var(--orange),rgba(255,107,26,0));
}
.timeline__item{position:relative;padding-bottom:clamp(22px,3vw,38px)}
.timeline__item::before{
  content:"";position:absolute;left:-26px;top:8px;width:9px;height:9px;
  background:var(--night);border:2px solid var(--orange);transform:rotate(45deg);
  transition:background .2s var(--ease),box-shadow .2s var(--ease);
}
.timeline__item.is-visible::before{background:var(--orange);box-shadow:0 0 0 4px rgba(255,107,26,.18)}
.timeline__stamp{display:block;font-family:var(--font-mono);font-size:11.5px;letter-spacing:.16em;color:var(--score-yellow);margin-bottom:6px}
.timeline__text{font-size:15px;color:var(--ink-70);max-width:34em}

/* 可展开内容组 */
.disclosure{border-top:1px solid var(--hair)}
.disclosure:last-child{border-bottom:1px solid var(--hair)}
.disclosure__trigger{
  display:flex;align-items:center;gap:14px;width:100%;
  padding:19px 0;text-align:left;font-size:16px;font-weight:700;color:var(--ink);
  transition:color .18s var(--ease);
}
.disclosure__trigger:hover{color:var(--orange-soft)}
.disclosure__index{font-family:var(--font-mono);font-size:12px;color:var(--orange);flex:none}
.disclosure__icon{position:relative;width:16px;height:16px;margin-left:auto;flex:none}
.disclosure__icon::before,.disclosure__icon::after{
  content:"";position:absolute;background:var(--orange-soft);
  transition:transform .22s var(--ease),opacity .22s var(--ease);
}
.disclosure__icon::before{left:0;right:0;top:7px;height:2px}
.disclosure__icon::after{top:0;bottom:0;left:7px;width:2px}
.disclosure__trigger[aria-expanded="true"] .disclosure__icon::after{transform:scaleY(0)}
.disclosure__panel{display:grid;grid-template-rows:0fr;transition:grid-template-rows .32s var(--ease)}
.disclosure__panel[data-open]{grid-template-rows:1fr}
.disclosure__inner{overflow:hidden;min-height:0}
.disclosure__body{padding-bottom:22px;color:var(--ink-70);max-width:38em}

/* 标签筛选 */
.tagset{display:flex;flex-wrap:wrap;gap:9px}
.tag{
  padding:8px 15px;border:1px solid var(--hair-strong);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;color:var(--ink-70);
  transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.tag:hover{border-color:var(--orange);color:var(--orange-soft)}
.tag[aria-pressed="true"],.tag[data-active]{
  background:var(--orange);border-color:var(--orange);color:var(--deep-ink);
}

/* 锚点侧栏 */
.anchor-nav{position:sticky;top:118px;font-family:var(--font-mono);font-size:12.5px}
.anchor-nav a{
  display:block;padding:9px 0 9px 15px;
  border-left:2px solid var(--hair);color:var(--ink-50);
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.anchor-nav a:hover{color:var(--ink)}
.anchor-nav a[aria-current="true"]{color:var(--orange);border-left-color:var(--orange)}

/* 图片容器 */
.media{
  position:relative;overflow:hidden;
  background:linear-gradient(135deg,var(--court-mid),var(--nightblue));
  aspect-ratio:16/10;border-radius:var(--radius);
}
.media--wide{aspect-ratio:21/9}
.media--square{aspect-ratio:1/1}
.media--tall{aspect-ratio:3/4}
.media__img{width:100%;height:100%;object-fit:cover}
.media__caption{
  position:absolute;left:0;right:0;bottom:0;
  padding:10px 14px;background:rgba(7,27,20,.78);
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.06em;color:var(--ink-70);
}

/* ---------- 9. 动效与滚动条 ---------- */
.scroll-progress{
  position:fixed;top:0;left:0;height:3px;width:0;z-index:300;
  background:linear-gradient(90deg,var(--orange),var(--score-yellow));
  pointer-events:none;
}
.reveal-ready [data-reveal]{opacity:0;transform:translateY(18px)}
.reveal-ready [data-reveal].is-visible{
  opacity:1;transform:none;
  transition:opacity .55s var(--ease),transform .55s var(--ease);
}
[data-reveal].is-visible{opacity:1;transform:none}

/* ---------- 10. 响应式 ---------- */
@media (max-width:1000px){
  .footer__grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer__col--brand{grid-column:1 / -1}
  .grid--4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
}

@media (max-width:960px){
  .nav-toggle{display:inline-flex;order:2}
  .brand{order:1}
  .header__bar{height:68px}
  .site-header[data-scrolled] .header__bar{height:60px}

  .site-nav{
    position:absolute;left:0;right:0;top:100%;
    display:block;
    background:var(--court);
    border-top:1px solid var(--hair);
    border-bottom:1px solid var(--hair);
    max-height:0;overflow:hidden;
    transition:max-height .34s var(--ease);
  }
  .site-nav[data-open]{max-height:min(72vh,560px);overflow-y:auto}
  .site-nav__list{flex-direction:column;align-items:stretch;gap:0;padding:8px var(--gutter) 22px}
  .site-nav__link{
    width:100%;padding:15px 0;font-size:17px;color:var(--ink);
    border-bottom:1px solid var(--hair);
    opacity:0;transform:translateY(-10px);
    transition:opacity .26s var(--ease),transform .26s var(--ease),color .18s var(--ease);
  }
  .site-nav__link::after{display:none}
  .site-nav[data-open] .site-nav__link{opacity:1;transform:none}
  .site-nav[data-open] .site-nav__item:nth-child(1) .site-nav__link{transition-delay:.05s}
  .site-nav[data-open] .site-nav__item:nth-child(2) .site-nav__link{transition-delay:.1s}
  .site-nav[data-open] .site-nav__item:nth-child(3) .site-nav__link{transition-delay:.15s}
  .site-nav[data-open] .site-nav__item:nth-child(4) .site-nav__link{transition-delay:.2s}
  .site-nav[data-open] .site-nav__item:nth-child(5) .site-nav__link{transition-delay:.25s}
  .site-nav[data-open] .site-nav__item:nth-child(6) .site-nav__link{transition-delay:.3s}
  .site-nav__num{font-size:11px}
  .site-nav__link[aria-current="page"]{color:var(--orange);border-bottom-color:var(--orange)}

  .anchor-nav{position:static}
  .scorecard{grid-template-columns:1fr;justify-items:start;gap:14px}
  .scorecard__side--end{justify-items:start;text-align:left}
  .scorecard__mid{text-align:left}
}

@media (max-width:620px){
  .scoreline__feed{display:none}
  .scoreline__inner{justify-content:space-between}
  .footer__grid{grid-template-columns:minmax(0,1fr)}
  .footer__base{flex-direction:column;align-items:flex-start}
  .grid--2{grid-template-columns:minmax(0,1fr)}
  .panel{padding:22px}
  p{max-width:none}
  .footer__contact li{flex-direction:column;gap:2px}
}

@media (max-width:420px){
  .brand__slogan{letter-spacing:.16em}
}

/* ---------- 11. 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;
  }
  .reveal-ready [data-reveal]{opacity:1;transform:none}
  .site-nav__link{opacity:1;transform:none}
}