/* ============================================================
   B体育主站 · /assets/site.css
   共享外壳：reset / 变量 / 中文排版 / 头部侧轨 / 页脚 / 通用组件
   ============================================================ */

:root{
  --ink-900:#0A1428;
  --ink-850:#0E1930;
  --ink-800:#12203A;
  --ink-line:#1E3252;
  --lime:#B6FF3C;
  --lime-soft:#D8FF8A;
  --orange:#FF8A2B;
  --orange-deep:#E0630F;
  --text:#E8EEF7;
  --muted:#8FA3BF;
  --alert:#FF4D5E;

  --rail-w:260px;
  --bar-pad:14px 18px;
  --radius-a:18px 6px 18px 6px;
  --radius-b:12px 4px 12px 4px;
  --dur:.2s;

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

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--text);
  font-family:var(--font-body);
  font-size:16.5px;
  line-height:1.85;
  letter-spacing:.01em;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4,h5,h6{font-weight:900;line-height:1.14;letter-spacing:-.015em;margin:0}
p{margin:0 0 1.15em}
ul,ol{margin:0;padding:0}
img,svg{display:block;max-width:100%}
button{font:inherit;color:inherit}
a{color:var(--lime-soft);text-decoration:none;transition:color var(--dur) ease,border-color var(--dur) ease}
a:hover{color:var(--lime)}
strong,b{color:#fff;font-weight:800}
hr{border:0;border-top:1px solid var(--ink-line);margin:34px 0}
:focus-visible{outline:2px solid var(--lime);outline-offset:3px}
::selection{background:var(--lime);color:var(--ink-900)}

.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}

.skip-link{
  position:absolute;left:12px;top:-70px;z-index:140;
  background:var(--lime);color:var(--ink-900);
  font-weight:800;font-size:14px;padding:10px 18px;
  border-radius:0 0 14px 14px;
  transition:top .18s ease;
}
.skip-link:focus{top:0;color:var(--ink-900)}

/* ---------- 头部：移动端吸顶条 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  border-bottom:1px solid var(--ink-line);
  background:var(--ink-900);
}
.header-bar{
  position:relative;z-index:70;
  display:flex;align-items:center;gap:12px;
  padding:var(--bar-pad);
  background:var(--ink-900);
}
.brand{display:flex;align-items:center;gap:10px;color:var(--text);min-width:0}
.brand:hover{color:var(--text)}
.brand-mark{
  flex:0 0 auto;width:34px;height:34px;display:grid;place-items:center;
  background:var(--lime);color:var(--ink-900);
  font-family:var(--font-mono);font-weight:700;font-size:17px;
  border-radius:11px 3px 11px 3px;letter-spacing:0;
}
.brand-text{display:block;min-width:0}
.brand-name{display:block;font-size:16.5px;font-weight:900;line-height:1.25;letter-spacing:.02em;white-space:nowrap}
.brand-sub{display:block;font-family:var(--font-mono);font-size:10.5px;letter-spacing:.22em;color:var(--muted);line-height:1.4}

.header-status{
  display:none;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.16em;color:var(--muted);
  white-space:nowrap;margin:0;
}
.status-dot{
  display:inline-block;flex:0 0 auto;width:7px;height:7px;border-radius:50%;
  background:var(--lime);box-shadow:0 0 0 3px rgba(182,255,60,.18);
}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 18px;border-radius:999px;border:1px solid transparent;
  font-size:14.5px;font-weight:800;letter-spacing:.02em;line-height:1.2;
  cursor:pointer;transition:background var(--dur) ease,color var(--dur) ease,border-color var(--dur) ease,transform var(--dur) ease;
}
.btn--accent{background:var(--orange);color:#160C02}
.btn--accent:hover{background:var(--lime);color:var(--ink-900);transform:translateY(-2px)}
.btn--accent:active{background:var(--orange-deep);color:#fff;transform:none}
.btn--ghost{background:transparent;border-color:var(--ink-line);color:var(--text)}
.btn--ghost:hover{border-color:var(--lime);color:var(--lime)}
.header-cta{margin-left:auto;white-space:nowrap}

.nav-toggle{
  display:inline-flex;align-items:center;gap:9px;
  padding:9px 14px;border-radius:999px;
  background:transparent;border:1px solid var(--ink-line);color:var(--text);
  cursor:pointer;transition:border-color var(--dur) ease,color var(--dur) ease;
}
.nav-toggle:hover{border-color:var(--lime);color:var(--lime)}
.nav-toggle-bars{position:relative;display:block;width:18px;height:2px;background:currentColor;transition:background var(--dur) ease}
.nav-toggle-bars::before,.nav-toggle-bars::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:currentColor;
  transition:transform var(--dur) ease,top var(--dur) 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{top:0;transform:rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after{top:0;transform:rotate(-45deg)}
.nav-toggle-label{font-family:var(--font-mono);font-size:11.5px;letter-spacing:.18em}

/* ---------- 导航：移动端抽屉 ---------- */
.site-nav{
  position:fixed;inset:0;z-index:65;
  display:flex;flex-direction:column;gap:20px;
  padding:92px 22px 34px;
  background:
    radial-gradient(rgba(182,255,60,.10) 1px,transparent 1px) 0 0/32px 32px,
    var(--ink-900);
  overflow-y:auto;
  opacity:0;visibility:hidden;pointer-events:none;transform:translateY(-10px);
  transition:opacity .22s ease,transform .22s ease,visibility .22s ease;
}
.site-nav[data-open]{opacity:1;visibility:visible;pointer-events:auto;transform:none}
.nav-caption{
  margin:0;font-family:var(--font-mono);font-size:11px;letter-spacing:.26em;
  color:var(--muted);display:flex;align-items:center;gap:10px;
}
.nav-caption::after{content:"";flex:1 1 auto;height:1px;background:var(--ink-line)}
.nav-list{list-style:none;display:flex;flex-direction:column;gap:2px}
.nav-link{
  display:flex;align-items:center;gap:14px;
  padding:12px 14px;border-left:2px solid transparent;
  border-radius:var(--radius-b);
  color:var(--muted);font-size:16px;font-weight:700;
  transition:color var(--dur) ease,background var(--dur) ease,border-color var(--dur) ease,transform var(--dur) ease;
}
.nav-link:hover{color:var(--text);background:var(--ink-800);transform:translateX(3px)}
.nav-num{font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;color:var(--muted);transition:color var(--dur) ease}
.nav-link[aria-current="page"]{color:var(--text);background:var(--ink-800);border-left-color:var(--lime)}
.nav-link[aria-current="page"] .nav-num{color:var(--lime)}
.nav-label{position:relative}
.nav-label::after{
  content:"";position:absolute;left:0;bottom:-4px;width:0;height:1px;
  background:var(--lime);transition:width var(--dur) ease;
}
.nav-link:hover .nav-label::after{width:100%}
.nav-foot{
  margin:auto 0 0;display:flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.14em;color:var(--muted);
  padding-top:18px;border-top:1px dashed var(--ink-line);
}
.rail-note{display:none}

/* 抽屉打开时锁滚动（仅移动/平板） */
@media (max-width:1023px){
  html.is-nav-open,html.is-nav-open body{overflow:hidden}
}

/* ---------- 头部：桌面侧轨 ---------- */
@media (min-width:640px){
  .header-status{display:flex;margin-left:auto}
  .header-cta{margin-left:0}
}
@media (min-width:1024px){
  body{padding-left:var(--rail-w)}
  .site-header{
    position:fixed;top:0;left:0;bottom:0;width:var(--rail-w);height:100vh;
    display:flex;flex-direction:column;
    padding:26px 20px 22px;
    border-bottom:0;border-right:1px solid var(--ink-line);
    background:
      linear-gradient(rgba(182,255,60,.06) 1px,transparent 1px) 0 0/100% 46px,
      linear-gradient(180deg,var(--ink-900) 0%,#08101F 100%);
  }
  .header-bar{
    flex-direction:column;align-items:flex-start;gap:16px;
    padding:0 0 20px;background:transparent;
    border-bottom:1px dashed var(--ink-line);
  }
  .header-status{margin-left:0}
  .header-cta{width:100%;margin-left:0}
  .nav-toggle{display:none}
  .site-nav{
    position:static;inset:auto;z-index:auto;
    flex:1 1 auto;display:flex;flex-direction:column;gap:14px;
    padding:22px 0 0;
    background:none;overflow:visible;
    opacity:1;visibility:visible;pointer-events:auto;transform:none;
  }
  .nav-link{padding:10px 12px}
  .nav-foot{margin-top:auto}
  .rail-note{
    display:block;position:absolute;right:12px;bottom:180px;
    margin:0;writing-mode:vertical-rl;
    font-family:var(--font-mono);font-size:11px;letter-spacing:.5em;
    color:var(--muted);opacity:.6;
  }
}
@media (min-width:1024px) and (max-height:719px){
  .rail-note{display:none}
}

/* ---------- 正文容器 ---------- */
.page-wrap{
  width:100%;max-width:920px;margin:0;
  padding:28px 22px 96px;
}
@media (min-width:1024px){
  .page-wrap{padding:42px clamp(32px,5vw,78px) 116px}
}

/* ---------- 面包屑 ---------- */
.breadcrumb{margin:0 0 26px}
.breadcrumb ol{list-style:none;display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.breadcrumb li{
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.16em;color:var(--muted);
}
.breadcrumb li::after{content:"/";margin-left:8px;color:var(--ink-line)}
.breadcrumb li:last-child::after{content:"";margin:0}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--lime)}

/* ---------- 章节标题 ---------- */
.section-head{margin:0 0 26px}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.24em;
  color:var(--lime);margin:0 0 14px;
}
.eyebrow::before{content:"";width:26px;height:2px;background:var(--lime)}
.section-title{font-size:clamp(26px,3.6vw,42px)}
.section-title--xl{font-size:clamp(38px,7vw,88px)}
.section-lede{color:var(--muted);max-width:58ch;margin-top:12px}

/* ---------- 网格 ---------- */
.grid{display:grid;gap:22px}
@media (min-width:720px){
  .grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (min-width:900px){
  .grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
}

/* ---------- 卡片 ---------- */
.card{
  background:var(--ink-800);
  border:1px solid var(--ink-line);
  border-radius:var(--radius-a);
  padding:24px;
  transition:border-color var(--dur) ease,transform var(--dur) ease;
}
.card:hover{border-color:var(--lime);transform:translateY(-2px)}
.card-title{font-size:19px;margin-bottom:10px}
.card-text{color:var(--muted);margin-bottom:0;font-size:15.5px}

/* ---------- 标签 ---------- */
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 11px;border-radius:999px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;
  border:1px solid var(--ink-line);color:var(--muted);
}
.tag--lime{border-color:rgba(182,255,60,.42);color:var(--lime);background:rgba(182,255,60,.08)}
.tag--orange{border-color:rgba(255,138,43,.45);color:var(--orange);background:rgba(255,138,43,.08)}

/* ---------- 数据行 ---------- */
.data-list{list-style:none;border-top:1px solid var(--ink-line)}
.data-row{
  display:flex;align-items:center;gap:16px;
  padding:14px 4px;border-bottom:1px solid var(--ink-line);
  transition:background var(--dur) ease,transform var(--dur) ease;
}
.data-row:hover{background:var(--ink-800);transform:translateX(3px)}
.data-rank{font-family:var(--font-mono);font-size:20px;color:var(--lime);min-width:2.2em}
.data-name{flex:1 1 auto;font-weight:700}
.data-value{font-family:var(--font-mono);font-size:20px;font-weight:700}

.stat-line{
  display:flex;align-items:baseline;justify-content:space-between;gap:18px;
  padding:12px 0;border-bottom:1px dashed var(--ink-line);
}
.stat-line dt{color:var(--muted);font-size:14px;margin:0}
.stat-line dd{margin:0;font-family:var(--font-mono);font-size:22px;font-weight:700;color:var(--lime)}

.trend{display:inline-flex;align-items:center;gap:6px;font-family:var(--font-mono);font-size:13px}
.trend--up{color:var(--lime)}
.trend--down{color:var(--alert)}

/* ---------- 图片容器（页面阶段放置占位） ---------- */
.media-frame{
  position:relative;isolation:isolate;
  aspect-ratio:16/10;overflow:hidden;
  border:1px solid var(--ink-line);
  border-radius:var(--radius-a);
  background:linear-gradient(140deg,var(--ink-800) 0%,#0B1526 100%);
}
.media-frame > img,.media-frame > svg{width:100%;height:100%;object-fit:cover}
.media-frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(182,255,60,.07) 1px,transparent 1px),
    linear-gradient(90deg,rgba(182,255,60,.07) 1px,transparent 1px);
  background-size:30px 30px;
}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--tall{aspect-ratio:4/5}
.media-frame--bleed{margin-right:calc(-1 * clamp(20px,5vw,78px));border-radius:var(--radius-a) 0 0 var(--radius-a)}
.media-tag{
  position:absolute;left:14px;top:14px;z-index:2;
  padding:3px 10px;border-radius:999px;
  background:var(--lime);color:var(--ink-900);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;font-weight:700;
}
.media-caption{
  font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;
  color:var(--muted);margin-top:10px;
}

/* ---------- 悬浮锚点 ---------- */
.panel-anchor{
  position:fixed;right:18px;bottom:18px;z-index:50;
  display:inline-flex;align-items:center;gap:8px;
  padding:10px 16px;border-radius:999px;
  background:var(--ink-800);border:1px solid var(--ink-line);color:var(--lime);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .25s ease,transform .25s ease,background var(--dur) ease,color var(--dur) ease;
}
.panel-anchor.is-visible{opacity:1;visibility:visible;transform:none}
.panel-anchor:hover{background:var(--lime);color:var(--ink-900)}

/* ---------- 滚动进度 ---------- */
.scroll-progress{
  position:fixed;top:0;left:0;z-index:130;
  width:0;height:2px;pointer-events:none;
  background:linear-gradient(90deg,var(--lime) 0%,var(--orange) 100%);
}

/* ---------- 显现 ---------- */
[data-reveal]{opacity:0;transform:translateY(14px);transition:opacity .5s ease,transform .5s ease}
[data-reveal].is-visible{opacity:1;transform:none}

/* ---------- 页脚 ---------- */
.site-footer{
  border-top:1px solid var(--ink-line);
  background:
    radial-gradient(rgba(182,255,60,.07) 1px,transparent 1px) 0 0/34px 34px,
    linear-gradient(180deg,#0B1526 0%,var(--ink-900) 100%);
}
.footer-grid{
  display:grid;gap:30px;grid-template-columns:1fr;
  padding:46px 22px 34px;
}
@media (min-width:700px){
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:34px}
}
@media (min-width:1024px){
  .footer-grid{
    grid-template-columns:1.4fr 1fr 1.2fr 1.2fr;
    gap:44px;padding:58px clamp(32px,5vw,78px) 42px;
  }
}
.footer-col{min-width:0}
.footer-logo{
  display:flex;align-items:center;gap:10px;
  font-size:19px;font-weight:900;letter-spacing:.02em;color:#fff;margin:0 0 14px;
}
.footer-logo-mark{
  display:grid;place-items:center;width:28px;height:28px;
  background:var(--lime);color:var(--ink-900);
  font-family:var(--font-mono);font-size:15px;font-weight:700;
  border-radius:9px 3px 9px 3px;
}
.footer-desc{color:var(--muted);font-size:15px;max-width:42ch;margin-bottom:14px}
.footer-icp{
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.12em;
  color:var(--muted);margin:0;
}
.footer-title{
  font-family:var(--font-mono);font-size:11.5px;font-weight:700;
  letter-spacing:.24em;color:var(--lime);margin:0 0 16px;
}
.footer-links{list-style:none;display:flex;flex-direction:column;gap:9px}
.footer-links a{
  display:inline-block;color:var(--text);font-size:15px;
  transition:color var(--dur) ease,transform var(--dur) ease;
}
.footer-links a:hover{color:var(--lime);transform:translateX(3px)}
.footer-meta{list-style:none;display:flex;flex-direction:column;gap:12px}
.footer-meta li{display:flex;flex-direction:column;gap:2px}
.meta-label{font-family:var(--font-mono);font-size:11px;letter-spacing:.2em;color:var(--muted)}
.meta-value{font-size:14.5px;color:var(--text);word-break:break-all}
.footer-note{color:var(--muted);font-size:14.5px;margin:0;max-width:40ch}

.footer-marquee{
  position:relative;overflow:hidden;
  border-top:1px solid var(--ink-line);border-bottom:1px solid var(--ink-line);
  background:var(--ink-850);
  padding:12px 0;
}
.marquee-track{
  display:flex;width:max-content;
  animation:marquee-scroll 40s linear infinite;
}
.footer-marquee:hover .marquee-track,
.footer-marquee:focus-within .marquee-track{animation-play-state:paused}
.marquee-group{display:flex;align-items:center;gap:38px;padding-right:38px}
.marquee-item{
  display:inline-flex;align-items:center;
  font-family:var(--font-mono);font-size:12.5px;letter-spacing:.1em;
  color:var(--lime-soft);white-space:nowrap;
}
.marquee-item::before{
  content:"";display:inline-block;
  width:6px;height:6px;margin-right:12px;border-radius:50%;
  background:var(--lime);
}
@keyframes marquee-scroll{
  from{transform:translateX(0)}
  to{transform:translateX(-50%)}
}

.footer-base{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:14px;padding:20px 22px 28px;
}
@media (min-width:1024px){
  .footer-base{padding:22px clamp(32px,5vw,78px) 32px}
}
.footer-copy{margin:0;font-family:var(--font-mono);font-size:11.5px;letter-spacing:.1em;color:var(--muted)}
.footer-legal{list-style:none;display:flex;flex-wrap:wrap;gap:18px}
.footer-legal a{font-size:13px;color:var(--muted)}
.footer-legal a:hover{color:var(--lime)}

/* ---------- 降低动效 ---------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms!important;
    animation-iteration-count:1!important;
    transition-duration:.001ms!important;
  }
  .marquee-track{animation:none;transform:none;width:100%;flex-wrap:wrap}
  .marquee-group[aria-hidden="true"]{display:none}
  [data-reveal]{opacity:1;transform:none}
  .panel-anchor{opacity:1;visibility:visible;transform:none}
}