/* ============================================================
   B体育入口 · 共享样式 /assets/site.css
   夜场墨绿底 + 荧光柠黄刻度 + 电光蓝数据高亮
   ============================================================ */

/* ---------- 1. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
html{scroll-padding-top:calc(var(--header-h) + 1.25rem)}
@media (prefers-reduced-motion: no-preference){html{scroll-behavior:smooth}}
body,h1,h2,h3,h4,h5,p,figure,blockquote,dl,dd{margin:0}
ul,ol{margin:0;padding:0}
ul[class],ol[class]{list-style:none}
img,svg,video,canvas{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
input,select,textarea{font:inherit}
a{color:inherit;text-decoration:none}
table{border-collapse:collapse;width:100%}
:focus-visible{outline:2px solid var(--lime);outline-offset:3px;border-radius:6px}

/* ---------- 2. 变量 ---------- */
:root{
  --ink:#06120F;
  --ink-2:#0B211B;
  --panel:#12332A;
  --line:#1C4A3C;
  --lime:#C8FF3D;
  --lime-soft:#E6FF8A;
  --blue:#2F7BFF;
  --white:#F4F7F2;
  --muted:#9DB3AA;
  --orange:#FF8A3D;
  --red:#FF5C5C;

  --font-head:"Barlow Condensed","Oswald","Arial Narrow","Noto Sans SC","PingFang SC",sans-serif;
  --font-num:"JetBrains Mono","Roboto Mono",ui-monospace,SFMono-Regular,Consolas,monospace;
  --font-body:"Inter","Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;

  --shell:1280px;
  --gutter:clamp(1rem,3vw,2.75rem);
  --radius:16px;
  --radius-organic:22px 14px 26px 12px;
  --header-h:66px;
  --ease:cubic-bezier(.2,.7,.3,1);
  --shadow:0 18px 44px -24px rgba(0,0,0,.92);
}

/* ---------- 3. 基础排版 ---------- */
body{
  min-height:100vh;
  background-color:var(--ink);
  background-image:
    radial-gradient(1100px 540px at 82% -8%, rgba(47,123,255,.18), transparent 62%),
    radial-gradient(760px 480px at 4% 2%, rgba(200,255,61,.09), transparent 60%),
    repeating-linear-gradient(90deg, rgba(157,179,170,.06) 0 1px, transparent 1px 88px);
  color:var(--white);
  font-family:var(--font-body);
  font-size:clamp(.95rem,1.05vw,1.05rem);
  font-weight:400;
  line-height:1.55;
  letter-spacing:.005em;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,h5{
  font-family:var(--font-head);
  font-weight:800;
  line-height:1.02;
  letter-spacing:.01em;
  color:var(--white);
}
h1{font-size:clamp(2.4rem,5vw,4.4rem)}
h2{font-size:clamp(1.8rem,3.2vw,2.8rem)}
h3{font-size:clamp(1.15rem,1.6vw,1.5rem);line-height:1.14}
h4{font-size:clamp(1rem,1.2vw,1.15rem);line-height:1.2}
::selection{background:var(--lime);color:#06120F}

.mono{font-family:var(--font-num);font-variant-numeric:tabular-nums;font-feature-settings:"zero" 1;letter-spacing:.02em}
.muted{color:var(--muted)}

/* ---------- 4. 跳至主要内容 ---------- */
.skip-link{
  position:fixed;top:.7rem;left:.7rem;z-index:300;
  transform:translateY(-180%);
  display:inline-block;padding:.6rem 1.05rem;
  border-radius:10px;
  background:var(--lime);color:#06120F;
  font-weight:700;font-size:.88rem;letter-spacing:.04em;
  transition:transform .18s var(--ease);
}
.skip-link:focus,.skip-link:focus-visible{transform:none;outline:2px solid #06120F;outline-offset:2px}

/* ---------- 5. 页头（框式导航） ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:linear-gradient(180deg,rgba(6,18,15,.97),rgba(6,18,15,.87));
  -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
  box-shadow:0 1px 0 rgba(200,255,61,.14);
  transition:box-shadow .2s var(--ease),background .2s var(--ease);
}
.site-header::before{
  content:"";position:absolute;inset:0 0 auto;height:2px;pointer-events:none;
  background:linear-gradient(90deg,var(--lime) 0 16%,transparent 16% 20%,rgba(200,255,61,.3) 20% 100%);
}
.site-header[data-scrolled="true"]{
  box-shadow:0 1px 0 rgba(200,255,61,.24),0 20px 42px -30px #000;
}
.scroll-progress{
  position:absolute;left:0;right:0;top:0;height:2px;z-index:2;
  background:linear-gradient(90deg,var(--lime),var(--lime-soft));
  transform:scaleX(var(--p,0));transform-origin:0 50%;
  transition:transform .12s linear;pointer-events:none;
}
.site-header__inner{
  position:relative;
  max-width:var(--shell);margin-inline:auto;
  min-height:var(--header-h);
  padding:.55rem var(--gutter);
  display:flex;align-items:center;gap:clamp(.75rem,2vw,1.75rem);
}

/* 品牌 */
.brand{display:inline-flex;align-items:center;gap:.65rem;flex:0 0 auto;color:var(--white)}
.brand__mark{
  width:38px;height:38px;flex:0 0 auto;
  display:grid;place-items:center;
  font-family:var(--font-num);font-weight:700;font-size:1.12rem;line-height:1;
  color:#06120F;
  background:linear-gradient(150deg,var(--lime),var(--lime-soft));
  border-radius:10px 4px 10px 4px;
  box-shadow:0 0 0 1px rgba(200,255,61,.45),0 10px 20px -12px rgba(200,255,61,.9);
}
.brand__text{display:grid;gap:.18rem;line-height:1}
.brand__name{font-family:var(--font-head);font-weight:800;font-size:1.3rem;letter-spacing:.06em}
.brand__tag{font-family:var(--font-body);font-size:.7rem;font-weight:500;letter-spacing:.12em;color:var(--muted)}
.brand--footer .brand__mark{width:34px;height:34px;font-size:1rem}

/* 移动菜单按钮 */
.nav-toggle{
  display:none;align-items:center;gap:.55rem;
  margin-left:auto;padding:.55rem .8rem;
  border:1px solid var(--line);border-radius:10px;
  background:rgba(18,51,42,.85);color:var(--white);
  font-weight:600;font-size:.85rem;letter-spacing:.06em;
  transition:border-color .16s var(--ease),background .16s var(--ease);
}
.nav-toggle:hover{border-color:var(--lime)}
.nav-toggle__bars{position:relative;display:block;width:18px;height:2px;border-radius:2px;background:var(--lime);transition:background .18s var(--ease)}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";position:absolute;left:0;width:18px;height:2px;border-radius:2px;
  background:var(--lime);transition:transform .18s var(--ease);
}
.nav-toggle__bars::before{top:-6px}
.nav-toggle__bars::after{top:6px}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars{background:transparent}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{transform:translateY(-6px) rotate(-45deg)}

/* 导航 */
.site-nav{
  display:flex;align-items:center;justify-content:flex-end;
  flex:1 1 auto;gap:clamp(.5rem,2vw,1.5rem);margin-left:auto;
}
.site-nav__list{display:flex;align-items:center;flex-wrap:wrap;justify-content:flex-end;gap:.1rem}
.site-nav__link{
  display:inline-block;padding:.5rem .7rem;
  border:1px solid transparent;border-radius:8px;
  font-family:var(--font-body);font-weight:600;font-size:.9rem;letter-spacing:.03em;
  color:var(--muted);
  transition:color .16s var(--ease),background .16s var(--ease),border-color .16s var(--ease);
}
.site-nav__link:hover{color:var(--white);border-color:var(--line);background:rgba(18,51,42,.6)}
.site-nav__link[aria-current="page"]{
  color:#06120F;background:var(--lime);border-color:var(--lime);
  box-shadow:0 10px 22px -16px var(--lime);
}
.site-nav__actions{
  display:flex;align-items:center;gap:.5rem;
  padding-left:clamp(.5rem,1.5vw,1rem);
  border-left:1px solid var(--line);
}

/* ---------- 6. 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.45rem;
  padding:.6rem 1.05rem;
  border:1px solid var(--line);border-radius:999px;
  background:rgba(18,51,42,.9);color:var(--white);
  font-family:var(--font-body);font-weight:600;font-size:.85rem;letter-spacing:.04em;
  transition:background .16s var(--ease),color .16s var(--ease),border-color .16s var(--ease),transform .16s var(--ease);
}
.btn:hover{transform:translateY(-1px)}
.btn--accent{background:var(--lime);border-color:var(--lime);color:#06120F;box-shadow:0 12px 26px -18px var(--lime)}
.btn--accent:hover{background:var(--lime-soft);border-color:var(--lime-soft)}
.btn--ghost{background:transparent;color:var(--white);border-color:var(--line)}
.btn--ghost:hover{border-color:var(--lime);color:var(--lime)}
.btn--signal{background:var(--orange);border-color:var(--orange);color:#200E02;box-shadow:0 12px 26px -18px var(--orange)}
.btn--signal:hover{background:#FFA268;border-color:#FFA268}

/* ---------- 7. 页脚 ---------- */
.site-footer{
  position:relative;overflow:hidden;
  margin-top:clamp(3rem,8vw,6rem);
  background:linear-gradient(180deg,var(--ink-2),var(--ink) 72%);
  border-top:1px solid var(--line);
}
.site-footer::before{
  content:"";position:absolute;inset:0 0 auto;height:6px;pointer-events:none;
  background:repeating-linear-gradient(90deg,var(--lime) 0 2px,transparent 2px 16px);
  opacity:.4;
}
.site-footer::after{
  content:"";position:absolute;right:-10%;bottom:-30%;width:520px;height:520px;pointer-events:none;
  background:radial-gradient(circle,rgba(47,123,255,.16),transparent 70%);
}
.site-footer__inner{
  position:relative;z-index:1;
  max-width:var(--shell);margin-inline:auto;
  display:grid;
  grid-template-columns:minmax(0,1.5fr) minmax(0,.8fr) minmax(0,.8fr) minmax(0,1.25fr);
  gap:clamp(1.5rem,4vw,3.5rem);
  padding:clamp(2.5rem,6vw,4.5rem) var(--gutter) clamp(1.75rem,4vw,2.75rem);
}
.footer-brand{display:grid;gap:1rem;align-content:start}
.footer-brand__text{color:var(--muted);font-size:.94rem;line-height:1.6;max-width:34ch}
.footer-brand__meta{
  font-family:var(--font-num);font-size:.72rem;font-weight:600;letter-spacing:.14em;
  color:var(--lime);
}
.footer-nav{display:grid;gap:.85rem;align-content:start}
.footer-nav__title{
  font-family:var(--font-body);font-size:.76rem;font-weight:700;letter-spacing:.16em;
  color:var(--lime);
}
.footer-nav__list{display:grid;gap:.2rem}
.footer-nav__link{
  display:inline-block;padding:.28rem 0;
  color:var(--muted);font-size:.92rem;
  transition:color .16s var(--ease),transform .16s var(--ease);
}
.footer-nav__link:hover{color:var(--white);transform:translateX(3px)}
.footer-contact{display:grid;gap:.85rem;align-content:start}
.footer-contact__list{display:grid;gap:.1rem}
.footer-contact__item{
  display:grid;gap:.1rem;
  padding:.5rem 0;
  border-bottom:1px dashed rgba(28,74,60,.85);
}
.footer-contact__item:last-child{border-bottom:0}
.footer-contact__label{font-family:var(--font-num);font-size:.68rem;font-weight:600;letter-spacing:.12em;color:var(--muted)}
.footer-contact__value{font-size:.9rem;color:var(--white);word-break:break-word}
.site-footer__base{
  position:relative;z-index:1;
  max-width:var(--shell);margin-inline:auto;
  padding:1.1rem var(--gutter) 1.75rem;
  border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:.7rem 1.75rem;
  font-size:.78rem;color:var(--muted);
}
.site-footer__legal{font-family:var(--font-num);letter-spacing:.05em}
.site-footer__copy{font-size:.78rem}
.site-footer__links{display:flex;flex-wrap:wrap;gap:1.1rem}
.site-footer__links a{color:var(--muted);transition:color .16s var(--ease)}
.site-footer__links a:hover{color:var(--lime)}

/* ---------- 8. 布局容器与章节 ---------- */
.shell{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:var(--gutter)}
.section{padding-block:clamp(2.25rem,6vw,4.75rem)}
.section--band{
  background:linear-gradient(180deg,rgba(11,33,27,.95),rgba(11,33,27,.6));
  border-block:1px solid var(--line);
}
.section-head{
  display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;
  gap:1rem 2.25rem;margin-bottom:clamp(1.25rem,3vw,2.25rem);
}
.section-head__text{display:grid;gap:.6rem;max-width:62ch}
.eyebrow{
  display:inline-flex;align-items:center;gap:.55rem;
  font-family:var(--font-num);font-size:.72rem;font-weight:600;letter-spacing:.2em;
  text-transform:uppercase;color:var(--lime);
}
.eyebrow::before{content:"";display:block;width:24px;height:2px;background:var(--lime)}

.rail-layout{
  display:grid;
  grid-template-columns:minmax(0,3fr) minmax(0,9fr);
  gap:clamp(1.5rem,3vw,2.75rem);
  align-items:start;
}
.rail{position:sticky;top:calc(var(--header-h) + 1.25rem)}
.grid-2{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:clamp(1rem,2vw,1.5rem)}
.grid-3{display:grid;grid-template-columns:repeat(auto-fit,minmax(205px,1fr));gap:clamp(.85rem,2vw,1.35rem)}

/* ---------- 9. 卡片与数据组件 ---------- */
.card{
  position:relative;
  padding:clamp(1rem,2vw,1.5rem);
  border:1px solid var(--line);border-radius:var(--radius);
  background:linear-gradient(160deg,rgba(18,51,42,.95),rgba(11,33,27,.9));
  box-shadow:var(--shadow);
}
.card--soft{
  border-radius:var(--radius-organic);
  background:
    radial-gradient(120% 120% at 0% 0%,rgba(200,255,61,.12),transparent 58%),
    linear-gradient(150deg,rgba(18,51,42,.95),rgba(11,33,27,.92));
}
.card__head{display:flex;align-items:flex-start;justify-content:space-between;gap:1rem;margin-bottom:.8rem}

.badge{
  display:inline-flex;align-items:center;gap:.35rem;
  padding:.2rem .55rem;
  border:1px solid currentColor;border-radius:999px;
  background:rgba(6,18,15,.55);
  font-family:var(--font-num);font-size:.66rem;font-weight:600;letter-spacing:.09em;
  color:var(--muted);white-space:nowrap;
}
.badge::before{content:"";width:6px;height:6px;border-radius:50%;background:currentColor}
.badge--live{color:var(--red)}
.badge--updated{color:var(--lime)}
.badge--pending{color:var(--blue)}
.badge--accent{color:var(--orange)}

.chip{
  display:inline-flex;align-items:center;gap:.4rem;
  padding:.4rem .78rem;
  border:1px solid var(--line);border-radius:999px;
  background:rgba(6,18,15,.6);color:var(--muted);
  font-size:.82rem;font-weight:600;letter-spacing:.03em;
  transition:color .16s var(--ease),background .16s var(--ease),border-color .16s var(--ease);
}
.chip:hover{color:var(--white);border-color:var(--lime)}
.chip[aria-pressed="true"],.chip.is-active{background:var(--lime);border-color:var(--lime);color:#06120F}

/* 图片容器基座（页面阶段放置图片） */
.media{
  position:relative;overflow:hidden;
  aspect-ratio:16/10;
  border:1px solid var(--line);border-radius:var(--radius);
  background:
    linear-gradient(135deg,rgba(47,123,255,.22),transparent 55%),
    radial-gradient(80% 80% at 18% 8%,rgba(200,255,61,.18),transparent 66%),
    var(--panel);
}
.media img{width:100%;height:100%;object-fit:cover}
.media--wide{aspect-ratio:21/9}
.media--tall{aspect-ratio:4/5}
.media--square{aspect-ratio:1/1}
.media__caption{
  position:absolute;left:0;right:0;bottom:0;
  padding:2.4rem 1rem .85rem;
  font-family:var(--font-num);font-size:.74rem;letter-spacing:.06em;color:var(--white);
  background:linear-gradient(0deg,rgba(6,18,15,.94),transparent);
}

/* ---------- 10. 面包屑 ---------- */
.breadcrumbs{margin-block:.25rem 0;font-size:.78rem;color:var(--muted)}
.breadcrumbs__list{display:flex;flex-wrap:wrap;align-items:center;gap:.5rem}
.breadcrumbs__list li{display:inline-flex;align-items:center;gap:.5rem}
.breadcrumbs__list li+li::before{content:"/";color:var(--line);font-family:var(--font-num)}
.breadcrumbs a{color:var(--muted);transition:color .16s var(--ease)}
.breadcrumbs a:hover{color:var(--lime)}
.breadcrumbs [aria-current="page"]{color:var(--white);font-family:var(--font-num)}

/* ---------- 11. 折叠内容组 ---------- */
.accordion{display:grid;gap:.65rem}
.accordion__item{
  overflow:hidden;
  border:1px solid var(--line);border-radius:14px;
  background:linear-gradient(160deg,rgba(18,51,42,.92),rgba(11,33,27,.88));
  transition:border-color .18s var(--ease);
}
.accordion__item[data-open]{border-color:rgba(200,255,61,.55)}
.accordion__trigger{
  display:flex;width:100%;align-items:center;justify-content:space-between;gap:1rem;
  padding:1rem 1.15rem;
  text-align:left;
  font-family:var(--font-body);font-weight:600;font-size:.98rem;color:var(--white);
  transition:color .16s var(--ease);
}
.accordion__trigger:hover{color:var(--lime)}
.accordion__icon{
  position:relative;flex:0 0 auto;width:18px;height:18px;
  border:1px solid var(--line);border-radius:50%;
}
.accordion__icon::before,
.accordion__icon::after{
  content:"";position:absolute;top:50%;left:50%;
  background:var(--lime);transform:translate(-50%,-50%);
  transition:transform .2s var(--ease),opacity .2s var(--ease);
}
.accordion__icon::before{width:8px;height:1.5px}
.accordion__icon::after{width:1.5px;height:8px}
.accordion__item[data-open] .accordion__icon::after{transform:translate(-50%,-50%) scaleY(0);opacity:0}
.accordion__panel{display:grid;grid-template-rows:0fr;transition:grid-template-rows .24s var(--ease)}
.accordion__item[data-open] .accordion__panel{grid-template-rows:1fr}
.accordion__body{
  overflow:hidden;min-height:0;
  padding-inline:1.15rem;
  color:var(--muted);font-size:.94rem;line-height:1.6;
}
.accordion__body > *+*{margin-top:.6rem}
.accordion__body > :last-child{margin-bottom:1.15rem}

/* ---------- 12. 正文容器 ---------- */
.reading{width:100%;max-width:74ch;margin-inline:auto}
.prose p+p{margin-top:1em}
.prose h2{margin-top:2.2em;margin-bottom:.55em}
.prose h3{margin-top:1.6em;margin-bottom:.45em}
.prose ul,.prose ol{padding-left:1.15rem;display:grid;gap:.4rem;list-style:disc}
.prose a{color:var(--lime);border-bottom:1px solid rgba(200,255,61,.4)}
.prose a:hover{border-bottom-color:var(--lime)}
.prose strong{color:var(--white);font-weight:600}

/* ---------- 13. 平板 ---------- */
@media (max-width:1024px){
  .nav-toggle{display:inline-flex}
  .site-nav{
    position:absolute;left:0;right:0;top:100%;
    flex-direction:column;align-items:stretch;justify-content:flex-start;
    gap:.75rem;margin:0;
    padding:1rem var(--gutter) 1.5rem;
    max-height:calc(100dvh - var(--header-h));
    overflow-y:auto;
    background:linear-gradient(180deg,rgba(11,33,27,.99),rgba(6,18,15,.99));
    border-bottom:1px solid var(--line);
    box-shadow:0 30px 56px -32px #000;
    opacity:0;visibility:hidden;transform:translateY(-10px);pointer-events:none;
    transition:opacity .18s var(--ease),transform .18s var(--ease),visibility .18s var(--ease);
  }
  .site-nav[data-open]{opacity:1;visibility:visible;transform:none;pointer-events:auto}
  .site-nav__list{flex-direction:column;align-items:stretch;gap:.25rem}
  .site-nav__link{
    display:block;padding:.8rem .9rem;
    font-size:1rem;border-radius:10px;border-color:rgba(28,74,60,.75);
  }
  .site-nav__actions{
    padding:.9rem 0 0;border-left:0;
    border-top:1px solid var(--line);
    justify-content:stretch;
  }
  .site-nav__actions .btn{flex:1 1 auto;padding:.75rem 1rem}
  .rail-layout{grid-template-columns:1fr}
  .rail{position:static;top:auto}
  .site-footer__inner{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-brand{grid-column:1/-1}
}

/* ---------- 14. 手机 ---------- */
@media (max-width:640px){
  .brand__tag{display:none}
  .brand__name{font-size:1.15rem}
  .brand__mark{width:34px;height:34px;font-size:1rem}
  .site-header__inner{padding-block:.5rem;gap:.6rem}
  .site-footer__inner{grid-template-columns:1fr;gap:1.75rem}
  .site-footer__base{flex-direction:column;align-items:flex-start;gap:.55rem}
  .grid-2,.grid-3{grid-template-columns:1fr}
}

/* ---------- 15. 降低动效 ---------- */
@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .btn:hover,.footer-nav__link:hover{transform:none}
}