/* ==========================================================================
   亿兆体育中心 · 共享样式表 /assets/site.css
   夜场竞技数据台：夜蓝底板 + 墨绿轨道 + 荧光青细线 + 赛道橙比分
   ========================================================================== */

/* ---------- 1. 设计变量 ---------- */
:root{
  --night:#0A1220;
  --deep:#0E2A26;
  --card:#14212F;
  --cyan:#3BF0C4;
  --orange:#FF6B2C;
  --white:#F4F1EA;
  --silver:#9AA7B4;
  --blue:#2E7CF6;
  --alert:#C4461F;
  --paper:#E6E9E4;

  --line:rgba(154,167,180,.22);
  --line-soft:rgba(154,167,180,.12);
  --cyan-line:rgba(59,240,196,.38);
  --cyan-wash:rgba(59,240,196,.08);

  --rail:88px;
  --bar-h:60px;
  --maxw:1240px;

  --font-display:"Barlow Condensed","Oswald","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"Roboto Mono","JetBrains Mono",ui-monospace,SFMono-Regular,Consolas,"PingFang SC",monospace;
  --font-body:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;

  --step-hero:clamp(3rem,9vw,7.5rem);
  --step-h2:clamp(2rem,4vw,3.25rem);
  --step-h3:clamp(1.25rem,2vw,1.75rem);
  --step-data:clamp(2.5rem,6vw,5rem);
  --step-body:clamp(1rem,1.1vw,1.125rem);

  --pad-x:clamp(18px,4vw,48px);
  --gap:clamp(14px,1.8vw,24px);
}

/* ---------- 2. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  min-height:100vh;
  background:var(--night);
  color:var(--white);
  font-family:var(--font-body);
  font-size:var(--step-body);
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  padding-top:var(--bar-h);
}
h1,h2,h3,h4,h5,h6,p,figure,blockquote,dl,dd,pre{margin:0}
h1,h2,h3,h4{line-height:1.15;font-weight:700}
ul,ol{margin:0;padding:0}
img,svg,video{display:block;max-width:100%}
button,input,select,textarea{font:inherit;color:inherit}
a{color:inherit;text-decoration:none}
time{font-variant-numeric:tabular-nums}
main{display:block}
::selection{background:var(--cyan);color:#04211A}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px}
hr{border:0;border-top:1px solid var(--line);margin:0}

/* ---------- 3. 跳转链接 ---------- */
.skip-link{
  position:fixed;top:0;left:0;z-index:200;
  transform:translateY(-140%);
  background:var(--cyan);color:#04211A;
  padding:10px 18px;font-weight:700;letter-spacing:.04em;
  transition:transform .2s ease;
}
.skip-link:focus{transform:translateY(0)}

/* ---------- 4. 头部 / 轨道 ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  height:var(--bar-h);
  background:var(--deep);
  border-bottom:1px solid var(--line);
}
.rail{
  display:flex;align-items:center;gap:12px;
  height:100%;
  padding:0 var(--pad-x);
}
.rail__head{margin-right:auto;min-width:0}
.rail__bar{display:flex;align-items:center;gap:12px}

/* 品牌 */
.brand{display:flex;flex-direction:column;gap:5px;min-width:0}
.brand__cn{
  font-family:var(--font-display);font-weight:700;
  font-size:16px;line-height:1;letter-spacing:.03em;color:var(--white);
}
.brand__line{display:block;width:26px;height:2px;background:var(--cyan)}
.brand__en{
  font-family:var(--font-mono);font-size:9px;line-height:1;
  letter-spacing:.2em;color:var(--silver);
}
.brand--footer .brand__cn{font-size:19px}
.brand--footer .brand__line{width:34px}

/* 移动端日期条 */
.rail__clock{
  display:flex;align-items:baseline;gap:6px;
  font-family:var(--font-mono);font-size:12px;
  letter-spacing:.06em;color:var(--silver);white-space:nowrap;
}
.rail__date{color:var(--cyan)}
.rail__week{font-size:11px;color:var(--silver)}

/* 抽屉按钮 */
.nav-toggle{
  display:inline-flex;align-items:center;gap:8px;
  background:none;border:1px solid var(--line);color:var(--white);
  padding:8px 12px;cursor:pointer;
  font-family:var(--font-display);font-size:13px;letter-spacing:.1em;
  transition:border-color .2s ease,color .2s ease;
}
.nav-toggle:hover{border-color:var(--cyan);color:var(--cyan)}
.nav-toggle__bars{display:flex;flex-direction:column;gap:3px;width:16px}
.nav-toggle__bars span{display:block;height:2px;background:currentColor;transition:transform .2s ease,opacity .2s ease}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1){transform:translateY(5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(3){transform:translateY(-5px) rotate(-45deg)}

/* 导航（移动端抽屉为默认） */
.site-nav{
  position:fixed;left:0;right:0;top:var(--bar-h);
  z-index:110;
  max-height:calc(100dvh - var(--bar-h));
  overflow-y:auto;
  display:flex;flex-direction:column;gap:18px;
  padding:18px var(--pad-x) calc(28px + env(safe-area-inset-bottom));
  background:var(--deep);
  border-top:1px solid var(--line);
  opacity:0;visibility:hidden;transform:translateY(-12px);
  transition:opacity .24s ease,transform .24s ease,visibility .24s ease;
}
.site-nav[data-open]{opacity:1;visibility:visible;transform:none}
.site-nav__list{list-style:none;display:grid;gap:4px}
.site-nav__link{
  position:relative;
  display:flex;align-items:center;gap:12px;
  padding:13px 12px;
  color:var(--silver);
  font-size:15px;letter-spacing:.02em;
  border-bottom:1px solid var(--line-soft);
  transition:color .2s ease,background .2s ease;
}
.site-nav__link:hover{color:var(--white);background:var(--cyan-wash)}
.site-nav__link[aria-current="page"]{color:var(--cyan);background:var(--cyan-wash)}
.site-nav__link[aria-current="page"]::before{
  content:"";position:absolute;left:-14px;top:50%;transform:translateY(-50%);
  width:3px;height:24px;background:var(--cyan);
}
.site-nav__idx{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;
  color:var(--silver);min-width:20px;
}
.site-nav__link[aria-current="page"] .site-nav__idx{color:var(--cyan)}
.site-nav__icon{
  width:20px;height:20px;flex:none;
  fill:none;stroke:currentColor;stroke-width:1.5;
  stroke-linecap:round;stroke-linejoin:round;
}
.site-nav__text{line-height:1.2}

/* 轨道底部状态区 */
.nav-foot{
  margin-top:auto;
  display:flex;flex-direction:column;gap:10px;
  padding-top:14px;
  border-top:1px solid var(--line);
}
.nav-foot__row{display:flex;flex-direction:column;gap:2px;min-width:0}
.nav-foot__k{
  font-family:var(--font-mono);font-size:10px;
  letter-spacing:.16em;color:var(--silver);
}
.nav-foot__v{
  font-family:var(--font-mono);font-size:14px;
  letter-spacing:.04em;color:var(--white);
}
.nav-foot__v--hot{color:var(--orange)}
.status-line{
  display:flex;align-items:center;gap:7px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;
  color:var(--cyan);
}
.status-dot{
  width:6px;height:6px;flex:none;background:var(--cyan);border-radius:50%;
  box-shadow:0 0 0 3px rgba(59,240,196,.16);
  animation:pulse 2.4s ease-in-out infinite;
}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.3}}

/* ---------- 5. 按钮 ---------- */
.btn{
  position:relative;
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 18px;
  font-family:var(--font-display);font-weight:600;font-size:14px;
  letter-spacing:.08em;line-height:1.2;
  color:var(--white);background:none;
  border:1px solid var(--line);
  cursor:pointer;
  transition:background .2s ease,color .2s ease,border-color .2s ease;
}
.btn:hover{border-color:var(--cyan);color:var(--cyan)}
.btn--cta{background:var(--orange);border-color:var(--orange);color:#1B0A02}
.btn--cta:hover{background:#FF8347;border-color:#FF8347;color:#1B0A02}
.btn--ghost{border-color:var(--cyan-line);color:var(--cyan)}
.btn--ghost:hover{background:var(--cyan-wash);border-color:var(--cyan)}
.btn--block{width:100%}
.btn--rail{
  flex-direction:column;gap:2px;width:100%;
  padding:9px 4px;font-size:11px;letter-spacing:.05em;
  line-height:1.35;text-align:center;white-space:normal;
}

/* ---------- 6. 布局容器与栅格 ---------- */
.container{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:var(--pad-x)}
.page-wrap{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:var(--pad-x)}
.section{padding-block:clamp(48px,7vw,96px);border-top:1px solid var(--line)}
.section--flush{border-top:0}
.section--deep{background:var(--deep)}
.section--card{background:var(--card)}

.grid{display:grid;gap:var(--gap)}
.grid--2{grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}
.grid--3{grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
.grid--4{grid-template-columns:repeat(auto-fit,minmax(200px,1fr))}
@media (min-width:1024px){
  .grid--12{grid-template-columns:repeat(12,1fr)}
}

/* ---------- 7. 章节标题体系 ---------- */
.section-head{display:flex;flex-direction:column;gap:8px;margin-bottom:clamp(24px,3.4vw,44px)}
.section-num{
  font-family:var(--font-display);font-weight:700;
  font-size:clamp(2.6rem,7vw,5rem);line-height:.85;
  color:rgba(59,240,196,.3);letter-spacing:.02em;
}
.section-title{
  font-family:var(--font-display);font-weight:700;
  font-size:var(--step-h2);line-height:1.02;letter-spacing:.01em;
  color:var(--white);
}
.eyebrow{
  font-family:var(--font-mono);font-size:12px;
  letter-spacing:.22em;text-transform:uppercase;color:var(--cyan);
}
.lede{max-width:68ch;color:var(--silver)}
.h3{font-family:var(--font-display);font-size:var(--step-h3);font-weight:600;color:var(--white)}

/* ---------- 8. 卡片 ---------- */
.card{
  position:relative;
  background:var(--card);
  border:1px solid var(--line);
  padding:clamp(16px,2vw,26px);
  overflow:hidden;
  transition:border-color .22s ease,background .22s ease;
}
.card::after{
  content:"";position:absolute;left:0;bottom:0;width:100%;height:1px;
  background:var(--cyan);transform:scaleX(0);transform-origin:left;
  transition:transform .22s ease;
}
.card:hover,.card:focus-within{border-color:var(--cyan-line)}
.card:hover::after,.card:focus-within::after{transform:scaleX(1)}
.card--slant{clip-path:polygon(0 0,100% 0,100% calc(100% - 16px),calc(100% - 16px) 100%,0 100%)}
.card--line{border-left:2px solid var(--cyan)}
.card__title{font-family:var(--font-display);font-size:var(--step-h3);font-weight:600;line-height:1.2;margin-bottom:8px}
.card__text{color:var(--silver);font-size:15px}
.card__meta{
  margin-top:14px;display:flex;flex-wrap:wrap;gap:10px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;color:var(--silver);
}

/* ---------- 9. 图片容器（响应式基础规则） ---------- */
.media{
  position:relative;overflow:hidden;
  aspect-ratio:16/9;
  background:linear-gradient(150deg,var(--deep) 0%,var(--card) 55%,#0B1A28 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 svg,.media video{width:100%;height:100%;object-fit:cover}
.media__cap{
  position:absolute;left:0;bottom:0;
  padding:8px 12px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;
  color:var(--silver);
  background:rgba(10,18,32,.78);
  border-top:1px solid var(--line);
}
.media__tag{position:absolute;top:10px;left:10px;z-index:2}
.media::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(var(--line-soft) 1px,transparent 1px),linear-gradient(90deg,var(--line-soft) 1px,transparent 1px);
  background-size:46px 46px;
  opacity:.5;
}

/* ---------- 10. 标签 / 数据 / 路径 ---------- */
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 9px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;
  color:var(--silver);background:rgba(20,33,47,.8);
  border:1px solid var(--line);
}
.tag--hot{color:var(--orange);border-color:rgba(255,107,44,.55)}
.tag--live{color:var(--cyan);border-color:var(--cyan-line)}
.tag--alert{color:var(--alert);border-color:rgba(196,70,31,.6)}

.stat{display:flex;flex-direction:column;gap:4px}
.stat__value{
  font-family:var(--font-mono);font-variant-numeric:tabular-nums;
  font-size:var(--step-data);line-height:1;color:var(--white);
}
.stat__label{font-family:var(--font-mono);font-size:12px;letter-spacing:.14em;color:var(--silver)}
.stat--accent .stat__value{color:var(--orange)}
.stat--cool .stat__value{color:var(--cyan)}
.stat--blue .stat__value{color:var(--blue)}

.path{list-style:none;display:grid;gap:0}
.path__item{position:relative;padding:0 0 26px 30px;border-left:1px solid var(--line)}
.path__item:last-child{padding-bottom:0;border-left-color:transparent}
.path__item::before{
  content:"";position:absolute;left:-4.5px;top:7px;
  width:8px;height:8px;background:var(--night);
  border:1px solid var(--cyan-line);transform:rotate(45deg);
}
.path__item--on::before{background:var(--cyan);border-color:var(--cyan)}
.path__title{font-family:var(--font-display);font-size:var(--step-h3);font-weight:600;color:var(--white);line-height:1.25}
.path__text{color:var(--silver);font-size:15px;margin-top:4px}

/* ---------- 11. 面包屑 / 正文 ---------- */
.breadcrumb{font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;color:var(--silver)}
.breadcrumb ol{list-style:none;display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.breadcrumb li{display:flex;align-items:center;gap:8px}
.breadcrumb li+li::before{content:"/";color:rgba(154,167,180,.5)}
.breadcrumb a{color:var(--silver);transition:color .2s ease}
.breadcrumb a:hover{color:var(--cyan)}
.breadcrumb [aria-current="page"]{color:var(--white)}

.prose{max-width:68ch}
.prose--wide{max-width:96ch}
.prose h2{font-family:var(--font-display);font-size:var(--step-h2);margin:1.6em 0 .5em;letter-spacing:.01em}
.prose h3{font-family:var(--font-display);font-size:var(--step-h3);margin:1.4em 0 .4em}
.prose p{margin:0 0 1.1em;color:var(--white)}
.prose ul,.prose ol{margin:0 0 1.2em;padding-left:1.3em;color:var(--silver)}
.prose li{margin-bottom:.4em}
.prose strong{color:var(--cyan);font-weight:600}
.prose a{color:var(--cyan);text-decoration:underline;text-underline-offset:3px}
.prose code{
  font-family:var(--font-mono);font-size:.9em;
  background:var(--card);border:1px solid var(--line);padding:2px 6px;
}
.prose blockquote{
  border-left:2px solid var(--cyan);padding:6px 0 6px 18px;
  margin:0 0 1.2em;color:var(--silver);
}
.prose--paper{
  background:var(--paper);color:#132420;
  padding:clamp(20px,3vw,40px);max-width:96ch;
}
.prose--paper p,.prose--paper li{color:#132420}
.prose--paper strong{color:#0B3B31}

/* ---------- 12. 动效 / 进度 ---------- */
.scroll-progress{
  position:fixed;top:0;left:0;right:0;height:2px;z-index:120;
  background:linear-gradient(90deg,var(--cyan),var(--orange));
  transform:scaleX(var(--p,0));transform-origin:left;
  pointer-events:none;
}
html.js-ready [data-reveal]{
  opacity:0;transform:translateY(12px);
  transition:opacity .5s ease,transform .5s ease;
}
html.js-ready [data-reveal].is-visible{opacity:1;transform:none}

/* ---------- 13. 页脚 ---------- */
.site-footer{
  margin-top:clamp(56px,8vw,120px);
  background:var(--deep);
  border-top:1px solid var(--line);
  color:var(--silver);
  font-size:14px;
}
.footer-grid{
  display:grid;grid-template-columns:1fr;
  gap:clamp(22px,3vw,36px);
  max-width:var(--maxw);margin-inline:auto;
  padding:clamp(32px,5vw,64px) var(--pad-x) clamp(24px,3vw,40px);
}
.footer-col{display:flex;flex-direction:column;gap:10px;min-width:0}
.footer-col__title{
  font-family:var(--font-mono);font-size:11px;font-weight:500;
  letter-spacing:.22em;text-transform:uppercase;color:var(--cyan);
}
.footer-text{color:var(--white);font-size:15px;line-height:1.7;max-width:34ch}
.footer-meta{margin:0;font-size:12.5px;line-height:1.7;color:var(--silver)}
.footer-icp{font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--silver)}
.footer-strong{font-family:var(--font-mono);font-size:13px;letter-spacing:.03em;color:var(--white)}
.footer-links{list-style:none;display:flex;flex-direction:column;gap:8px}
.footer-links li{font-size:13.5px;line-height:1.6;color:var(--silver)}
.footer-links a{
  color:var(--white);
  border-bottom:1px solid transparent;
  transition:color .2s ease,border-color .2s ease;
}
.footer-links a:hover{color:var(--cyan);border-bottom-color:var(--cyan)}
.footer-status{
  display:flex;align-items:center;gap:8px;flex-wrap:wrap;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;
  color:var(--silver);
}
.footer-num{color:var(--cyan);font-variant-numeric:tabular-nums}
.footer-bottom{
  max-width:var(--maxw);margin-inline:auto;
  padding:16px var(--pad-x) calc(20px + env(safe-area-inset-bottom));
  border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:10px 24px;
  align-items:center;justify-content:space-between;
}

/* ---------- 14. 响应式：≥640 / ≥1024 ---------- */
@media (min-width:640px){
  .footer-grid{grid-template-columns:repeat(2,1fr)}
}
@media (min-width:1024px){
  body{padding-top:0;padding-left:var(--rail)}
  .scroll-progress{left:var(--rail)}

  .site-header{
    top:0;left:0;bottom:0;right:auto;
    width:var(--rail);height:100vh;height:100dvh;
    border-bottom:0;border-right:1px solid var(--line);
  }
  .rail{
    flex-direction:column;align-items:stretch;
    height:100%;padding:16px 8px;gap:12px;
  }
  .rail__head{margin:0;padding-bottom:12px;border-bottom:1px solid var(--line)}
  .brand{align-items:center;text-align:center}
  .brand__line{width:22px}
  .rail__bar{display:none}

  .site-nav{
    position:static;
    display:flex;flex-direction:column;gap:0;
    flex:1;min-height:0;
    max-height:none;
    overflow-y:auto;overflow-x:hidden;
    padding:10px 0 0;
    background:none;border-top:0;
    opacity:1;visibility:visible;transform:none;
    scrollbar-width:thin;
  }
  .site-nav__list{display:flex;flex-direction:column;gap:2px}
  .site-nav__link{
    flex-direction:column;align-items:center;gap:4px;
    padding:9px 2px;
    font-size:11px;letter-spacing:.04em;
    border-bottom:0;
    border:1px solid transparent;
  }
  .site-nav__link:hover{border-color:var(--cyan-line)}
  .site-nav__link[aria-current="page"]::before{
    left:-9px;top:50%;transform:translateY(-50%);height:22px;
  }
  .site-nav__idx{font-size:9px;letter-spacing:.14em}
  .site-nav__icon{width:17px;height:17px}
  .site-nav__text{font-size:11px;letter-spacing:.02em}

  .nav-foot{margin-top:auto;padding-top:12px;gap:8px}
  .nav-foot__k{font-size:9px;letter-spacing:.12em}
  .nav-foot__v{font-size:12px}
  .status-line{font-size:10px;letter-spacing:.02em}

  .footer-grid{grid-template-columns:1.5fr 1fr 1.1fr 1fr}
  html.nav-open{overflow:auto}
}
@media (min-width:1200px){
  :root{--rail:92px}
}

/* ---------- 15. 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;
  }
  html.js-ready [data-reveal]{opacity:1;transform:none;transition:none}
  .card::after{transform:none;opacity:0}
  .status-dot{animation:none}
}