/* ==========================================================================
   米尔体育赛场 · V2.0 · 共享样式表 /assets/site.css
   夜间赛场指挥中心：固定左轨道 · 连续画布 · 记分牌数字
   ========================================================================== */

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

/* ---------- 2. 设计变量 ---------- */
:root{
  /* 色阶 */
  --ink-950:#05150F;
  --ink-900:#0B2A1E;
  --ink-800:#123D2A;
  --ink-700:#1A4A33;
  --line:#27473A;

  --lime:#C6FF3D;
  --lime-dim:#8FD41F;
  --orange:#FF8A3D;
  --steel:#9FB6C6;

  --text:#E4EDE6;
  --text-dim:#7C9488;

  /* 尺度 */
  --rail-w:84px;
  --bar-h:64px;
  --gutter:clamp(20px,4vw,64px);
  --measure:68ch;
  --stack-gap:clamp(16px,2vw,28px);

  /* 字体 */
  --font-head:"PingFang SC","Noto Sans SC","Source Han Sans SC","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"JetBrains Mono","SFMono-Regular",Menlo,Consolas,"Liberation Mono",monospace;

  /* 五级字号 */
  --fs-hero:clamp(60px,10.5vw,128px);
  --fs-xl:clamp(38px,5.6vw,72px);
  --fs-lg:clamp(26px,3.2vw,44px);
  --fs-md:24px;
  --fs-base:16px;

  /* 动效 */
  --ease:cubic-bezier(.22,.61,.36,1);
  --r-organic:22px 6px 22px 6px;
  --r-soft:16px 4px 16px 4px;
}

/* ---------- 3. 基础排版 ---------- */
body{
  min-height:100vh;
  padding-left:var(--rail-w);
  background:var(--ink-950);
  color:var(--text);
  font-family:var(--font-body);
  font-size:var(--fs-base);
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

h1,h2,h3,h4,h5{
  font-family:var(--font-head);
  font-weight:800;
  line-height:1.05;
  letter-spacing:-.02em;
  color:var(--text);
  text-wrap:balance;
}
h1{font-size:var(--fs-hero);line-height:.95}
h2{font-size:var(--fs-xl)}
h3{font-size:var(--fs-lg);line-height:1.12}
h4{font-size:var(--fs-md);line-height:1.28;font-weight:700}
h5{font-size:18px;line-height:1.4;font-weight:700}

p{line-height:1.75}
strong{font-weight:700;color:var(--text)}
small{font-size:13px;color:var(--text-dim)}

::selection{background:var(--lime);color:var(--ink-950)}

:focus-visible{
  outline:2px solid var(--lime);
  outline-offset:3px;
  border-radius:3px;
}

/* ---------- 4. 布局工具 ---------- */
.shell{
  width:100%;
  max-width:1440px;
  margin-inline:auto;
  padding-inline:var(--gutter);
}

.section{
  position:relative;
  padding-block:clamp(52px,7.5vw,116px);
}
.section--raised{background:var(--ink-900)}
.section--panel{background:var(--ink-800)}
.section--pitch{
  background-color:var(--ink-950);
  background-image:repeating-linear-gradient(
    112deg,
    rgba(198,255,61,.05) 0 1px,
    transparent 1px 16px
  );
}
.section--raised.section--pitch{
  background-color:var(--ink-900);
  background-image:repeating-linear-gradient(
    112deg,
    rgba(198,255,61,.045) 0 1px,
    transparent 1px 18px
  );
}

.stack{display:flex;flex-direction:column;gap:var(--stack-gap)}

.grid{display:grid;gap:clamp(20px,3vw,40px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--split{grid-template-columns:minmax(0,2.1fr) minmax(0,1fr);align-items:start}
.grid--split > :last-child{position:sticky;top:32px}

.measure{max-width:var(--measure)}
.lede{font-size:clamp(17px,1.4vw,20px);line-height:1.7;color:var(--text-dim);max-width:var(--measure)}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--lime);
  margin-bottom:18px;
}
.eyebrow::before{
  content:"";
  width:26px;
  height:2px;
  background:var(--lime);
  flex:none;
}

/* ---------- 5. 文字色阶与数字 ---------- */
.u-technical{
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.08em;
  text-transform:uppercase;
  color:var(--steel);
}
.u-mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.u-dim{color:var(--text-dim)}
.u-lime{color:var(--lime)}
.u-orange{color:var(--orange)}

.num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-feature-settings:"tnum" 1;
  font-weight:700;
  line-height:.9;
  letter-spacing:-.03em;
  color:var(--lime);
}
.num--xl{font-size:clamp(56px,9.5vw,128px)}

/* ---------- 6. 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  padding:13px 24px;
  border-radius:999px;
  border:1px solid transparent;
  font-family:var(--font-head);
  font-size:15px;
  font-weight:700;
  letter-spacing:.02em;
  line-height:1.2;
  transition:transform .18s var(--ease),
             background-color .18s var(--ease),
             color .18s var(--ease),
             border-color .18s var(--ease);
}
.btn:hover{transform:translateY(-2px)}
.btn:active{transform:translateY(0)}
.btn--primary{background:var(--lime);color:var(--ink-950)}
.btn--primary:hover{background:var(--lime-dim)}
.btn--ghost{border-color:var(--line);color:var(--text)}
.btn--ghost:hover{border-color:var(--lime);color:var(--lime)}
.btn--accent{background:var(--orange);color:var(--ink-950)}
.btn--accent:hover{background:#ff9c5c}

/* ---------- 7. 面包屑 ---------- */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--text-dim);
  margin-bottom:clamp(20px,3vw,36px);
}
.breadcrumb a{color:var(--text-dim);transition:color .18s var(--ease)}
.breadcrumb a:hover{color:var(--lime)}
.breadcrumb__sep{color:var(--line);user-select:none}
.breadcrumb [aria-current="page"]{color:var(--text)}

/* ---------- 8. 面板 / 状态条 / 技术提示 ---------- */
.panel{
  background:var(--ink-800);
  border-radius:var(--r-organic);
  padding:clamp(20px,3vw,34px);
  position:relative;
  overflow:hidden;
}

.status-bar{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:9px 16px;
  border-radius:999px;
  background:rgba(18,61,42,.9);
  border:1px solid rgba(198,255,61,.24);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--text);
}
.status-bar__dot{
  width:7px;
  height:7px;
  border-radius:50%;
  background:var(--lime);
  flex:none;
}
.status-bar--warn{
  border-color:rgba(255,138,61,.38);
  background:rgba(255,138,61,.1);
}
.status-bar--warn .status-bar__dot{background:var(--orange)}

.tech-note{
  position:relative;
  padding:16px 18px;
  border-radius:4px;
  background:rgba(159,182,198,.07);
  border:1px solid rgba(159,182,198,.2);
  border-left:3px solid var(--steel);
  font-family:var(--font-mono);
  font-size:13px;
  line-height:1.7;
  letter-spacing:.02em;
  color:var(--steel);
  overflow:hidden;
}
.tech-note::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:repeating-linear-gradient(
    0deg,
    rgba(159,182,198,.06) 0 1px,
    transparent 1px 4px
  );
}
.tech-note strong{color:var(--text)}

/* ---------- 9. 图片容器（页面阶段使用） ---------- */
.media{
  position:relative;
  overflow:hidden;
  border-radius:var(--r-soft);
  background:var(--ink-800);
  aspect-ratio:16/9;
}
.media--wide{aspect-ratio:21/9}
.media--tall{aspect-ratio:4/5}
.media--square{aspect-ratio:1/1}
.media > img,
.media > picture > img{
  width:100%;
  height:100%;
  object-fit:cover;
}
.media__placeholder{
  position:absolute;
  inset:0;
  display:grid;
  place-items:center;
  text-align:center;
  padding:16px;
  background:
    radial-gradient(120% 90% at 18% 0%, rgba(198,255,61,.16), transparent 62%),
    repeating-linear-gradient(112deg, rgba(228,237,230,.05) 0 1px, transparent 1px 14px),
    var(--ink-800);
  color:var(--steel);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.16em;
  text-transform:uppercase;
}

/* ---------- 10. 展开组 ---------- */
.disclosure{
  border-top:1px solid var(--line);
}
.disclosure:last-child{border-bottom:1px solid var(--line)}
.disclosure__toggle{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  width:100%;
  padding:20px 4px;
  text-align:left;
  font-family:var(--font-head);
  font-size:clamp(16px,1.6vw,19px);
  font-weight:700;
  line-height:1.4;
  color:var(--text);
  transition:color .18s var(--ease);
}
.disclosure__toggle::after{
  content:"+";
  flex:none;
  display:grid;
  place-items:center;
  width:26px;
  height:26px;
  border-radius:50%;
  border:1px solid var(--line);
  font-family:var(--font-mono);
  font-size:15px;
  line-height:1;
  color:var(--lime);
  transition:transform .22s var(--ease),background-color .22s var(--ease);
}
.disclosure__toggle:hover{color:var(--lime)}
.disclosure[data-open] .disclosure__toggle::after{
  content:"–";
  transform:rotate(180deg);
  background:rgba(198,255,61,.14);
}
.disclosure__panel{
  padding:0 4px 22px;
  color:var(--text-dim);
  max-width:var(--measure);
}

/* ---------- 11. 滚动渐显 ---------- */
html.js [data-reveal]{
  opacity:0;
  transform:translateY(16px);
  transition:opacity .32s var(--ease),transform .32s var(--ease);
}
html.js [data-reveal].is-visible{
  opacity:1;
  transform:none;
}

/* ---------- 12. 页头 / 侧边轨道 ---------- */
.skip-link{
  position:fixed;
  top:10px;
  left:10px;
  z-index:300;
  transform:translateY(-220%);
  padding:10px 18px;
  border-radius:999px;
  background:var(--lime);
  color:var(--ink-950);
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.06em;
  font-weight:700;
  transition:transform .2s var(--ease);
}
.skip-link:focus-visible{transform:translateY(0)}

.site-header{
  position:fixed;
  top:0;
  bottom:0;
  left:0;
  z-index:120;
  width:var(--rail-w);
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:10px;
  padding:18px 0 16px;
  background:var(--ink-950);
  border-right:1px solid var(--line);
}

/* 品牌 */
.brand{
  flex:none;
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:8px;
  padding:0 4px;
  text-align:center;
  transition:transform .2s var(--ease);
}
.brand:hover{transform:translateY(-1px)}
.brand__mark{
  display:grid;
  place-items:center;
  width:44px;
  height:44px;
  flex:none;
  border-radius:14px 4px 14px 4px;
  background:var(--lime);
  color:var(--ink-950);
  font-family:var(--font-head);
  font-size:22px;
  font-weight:800;
  line-height:1;
  letter-spacing:-.03em;
}
.brand__name{
  max-width:2.6em;
  font-family:var(--font-head);
  font-size:11px;
  font-weight:700;
  line-height:1.35;
  letter-spacing:.02em;
  color:var(--text);
}
.brand__ver{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.08em;
  line-height:1.2;
  color:var(--lime);
  border:1px solid rgba(198,255,61,.34);
  border-radius:999px;
  padding:1px 6px;
}

/* 移动导航按钮（桌面隐藏） */
.nav-toggle{
  display:none;
  align-items:center;
  gap:10px;
  padding:8px 14px;
  border-radius:999px;
  border:1px solid var(--line);
  background:rgba(18,61,42,.7);
  color:var(--text);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  transition:border-color .2s var(--ease),background-color .2s var(--ease);
}
.nav-toggle:hover{border-color:var(--lime-dim)}
.nav-toggle__bars{
  position:relative;
  width:18px;
  height:12px;
  flex:none;
}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";
  position:absolute;
  left:0;
  width:100%;
  height:2px;
  border-radius:2px;
  background:var(--lime);
  transition:top .22s var(--ease),transform .22s var(--ease);
}
.nav-toggle__bars::before{top:1px}
.nav-toggle__bars::after{top:9px}
.site-header[data-open] .nav-toggle__bars::before{top:5px;transform:rotate(45deg)}
.site-header[data-open] .nav-toggle__bars::after{top:5px;transform:rotate(-45deg)}
.nav-toggle__label{white-space:nowrap}

/* 轨道导航 */
.site-nav{
  flex:1 1 auto;
  display:flex;
  align-items:center;
  width:100%;
  min-height:0;
}
.site-nav__list{
  display:flex;
  flex-direction:column;
  gap:2px;
  width:100%;
}
.site-nav__item{width:100%}
.site-nav__link{
  position:relative;
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:3px;
  padding:9px 4px;
  border-radius:0 8px 8px 0;
  color:var(--text-dim);
  transition:color .2s var(--ease),background-color .2s var(--ease);
}
.site-nav__index{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.1em;
  line-height:1;
  opacity:.75;
}
.site-nav__text{
  font-family:var(--font-body);
  font-size:11px;
  font-weight:500;
  line-height:1.3;
  letter-spacing:.01em;
  text-align:center;
  text-wrap:balance;
}
.site-nav__link:hover{
  color:var(--text);
  background:rgba(198,255,61,.07);
}
.site-nav__link[aria-current="page"]{
  color:var(--lime);
  background:rgba(198,255,61,.1);
}
.site-nav__link[aria-current="page"]::before{
  content:"";
  position:absolute;
  left:0;
  top:50%;
  transform:translateY(-50%);
  width:3px;
  height:24px;
  border-radius:0 3px 3px 0;
  background:var(--lime);
}

/* 滚动进度 */
.rail-progress{
  position:absolute;
  top:0;
  bottom:0;
  left:0;
  width:2px;
  background:rgba(198,255,61,.08);
  pointer-events:none;
}
.rail-progress__bar{
  display:block;
  width:100%;
  height:100%;
  background:linear-gradient(180deg,var(--lime),var(--lime-dim));
  transform:scaleY(0);
  transform-origin:top center;
  transition:transform .12s linear;
}

/* 轨道底部状态 */
.rail-foot{
  flex:none;
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:8px;
  width:calc(100% - 20px);
  padding-top:12px;
  border-top:1px solid var(--line);
}
.rail-foot__dot{
  width:8px;
  height:8px;
  border-radius:50%;
  background:var(--lime);
  box-shadow:0 0 0 4px rgba(198,255,61,.14);
}
.rail-foot__text{
  font-family:var(--font-mono);
  font-size:9px;
  line-height:1.5;
  letter-spacing:.14em;
  text-align:center;
  color:var(--text-dim);
}

/* 移动端遮罩（桌面不显示） */
.nav-scrim{display:none}

/* ---------- 13. 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:0;
  background-color:var(--ink-900);
  background-image:repeating-linear-gradient(
    104deg,
    rgba(198,255,61,.045) 0 1px,
    transparent 1px 18px
  );
  border-top:1px solid var(--line);
  padding-block:clamp(44px,6vw,86px) 26px;
}

.footer__grid{
  display:grid;
  grid-template-columns:minmax(230px,1.6fr) repeat(4,minmax(110px,.72fr));
  gap:clamp(26px,4vw,56px);
  align-items:start;
}

.footer__brand{display:flex;flex-direction:column;align-items:flex-start}
.footer__brandlink{
  display:inline-flex;
  align-items:center;
  gap:12px;
  margin-bottom:16px;
}
.footer__mark{
  display:grid;
  place-items:center;
  width:44px;
  height:44px;
  flex:none;
  border-radius:14px 4px 14px 4px;
  background:var(--lime);
  color:var(--ink-950);
  font-family:var(--font-head);
  font-size:22px;
  font-weight:800;
  line-height:1;
  letter-spacing:-.03em;
}
.footer__name{
  font-family:var(--font-head);
  font-size:20px;
  font-weight:800;
  letter-spacing:-.01em;
  line-height:1.2;
  color:var(--text);
}
.footer__tag{
  font-size:14px;
  line-height:1.7;
  color:var(--text-dim);
  max-width:30ch;
  margin-bottom:8px;
}
.footer__meta{
  font-family:var(--font-mono);
  font-size:12px;
  line-height:1.7;
  letter-spacing:.05em;
  color:var(--steel);
  max-width:32ch;
  margin-bottom:20px;
}
.footer__cta{margin-top:2px}

.footer__col{min-width:0}
.footer__title{
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:500;
  letter-spacing:.16em;
  text-transform:uppercase;
  line-height:1.4;
  color:var(--steel);
  margin-bottom:16px;
}
.footer__list{display:flex;flex-direction:column;gap:10px}
.footer__list a{
  display:inline-block;
  font-size:14px;
  line-height:1.6;
  color:var(--text-dim);
  transition:color .18s var(--ease),transform .18s var(--ease);
}
.footer__list a:hover{
  color:var(--lime);
  transform:translateX(4px);
}

.footer__base{
  margin-top:clamp(36px,5vw,68px);
  padding-top:20px;
  border-top:1px solid var(--line);
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  justify-content:space-between;
  gap:8px 28px;
}
.footer__contact,
.footer__legal{
  font-family:var(--font-mono);
  font-size:12px;
  line-height:1.8;
  letter-spacing:.03em;
  color:var(--text-dim);
  max-width:100%;
}
.footer__legal{color:#5F7A6D}

/* ---------- 14. 平板 ---------- */
@media (max-width:1199px){
  .footer__grid{
    grid-template-columns:minmax(0,1fr) repeat(2,minmax(0,1fr));
    gap:32px 28px;
  }
  .footer__brand{grid-column:1 / -1}
  .grid--split{grid-template-columns:minmax(0,1fr)}
  .grid--split > :last-child{position:static}
}

@media (max-width:1024px){
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
}

/* ---------- 15. 移动端：轨道收为抽屉 ---------- */
@media (max-width:899px){
  html{scroll-padding-top:calc(var(--bar-h) + 16px)}
  body{
    padding-left:0;
    padding-top:var(--bar-h);
  }

  .site-header{
    top:0;
    bottom:auto;
    left:0;
    right:0;
    width:auto;
    height:var(--bar-h);
    flex-direction:row;
    align-items:center;
    justify-content:space-between;
    gap:12px;
    padding:0 16px;
    background:rgba(5,21,15,.96);
    -webkit-backdrop-filter:blur(12px);
    backdrop-filter:blur(12px);
    border-right:0;
    border-bottom:1px solid var(--line);
  }

  .brand{
    flex-direction:row;
    align-items:center;
    gap:10px;
    padding:0;
    text-align:left;
  }
  .brand__mark{
    width:34px;
    height:34px;
    font-size:17px;
    border-radius:9px 3px 9px 3px;
  }
  .brand__name{
    max-width:none;
    font-size:13px;
    letter-spacing:.02em;
    white-space:nowrap;
  }
  .brand__ver{font-size:9px;padding:1px 5px}

  .nav-toggle{display:inline-flex}
  .rail-progress,
  .rail-foot{display:none}

  .site-nav{
    position:fixed;
    top:var(--bar-h);
    left:0;
    right:0;
    z-index:2;
    flex:none;
    display:block;
    max-height:calc(100vh - var(--bar-h));
    overflow-y:auto;
    padding:12px 16px 26px;
    background:var(--ink-900);
    border-bottom:1px solid var(--line);
    box-shadow:0 24px 48px rgba(0,0,0,.45);
    opacity:0;
    visibility:hidden;
    transform:translateY(-14px);
    pointer-events:none;
    transition:opacity .22s var(--ease),
               transform .22s var(--ease),
               visibility .22s var(--ease);
  }
  .site-nav__list{flex-direction:column;gap:2px;align-items:stretch}
  .site-nav__link{
    flex-direction:row;
    align-items:center;
    justify-content:flex-start;
    gap:14px;
    padding:14px 14px;
    border-radius:10px;
  }
  .site-nav__index{
    font-size:12px;
    min-width:22px;
    color:var(--lime-dim);
    opacity:1;
  }
  .site-nav__text{
    font-size:15px;
    font-weight:500;
    text-align:left;
  }
  .site-nav__link[aria-current="page"]::before{
    left:0;
    top:12px;
    bottom:12px;
    height:auto;
    width:3px;
    transform:none;
    border-radius:3px;
  }

  .site-header[data-open] .site-nav{
    opacity:1;
    visibility:visible;
    transform:translateY(0);
    pointer-events:auto;
  }

  .nav-scrim{
    display:block;
    position:fixed;
    top:var(--bar-h);
    right:0;
    bottom:0;
    left:0;
    z-index:1;
    background:rgba(5,21,15,.72);
    opacity:0;
    visibility:hidden;
    pointer-events:none;
    transition:opacity .22s var(--ease),visibility .22s var(--ease);
  }
  .site-header[data-open] .nav-scrim{
    opacity:1;
    visibility:visible;
    pointer-events:auto;
  }

  .grid--2,
  .grid--3{grid-template-columns:minmax(0,1fr)}
}

@media (max-width:640px){
  .footer__grid{grid-template-columns:minmax(0,1fr);gap:28px}
  .footer__brand{grid-column:auto}
  .footer__base{flex-direction:column;align-items:flex-start}
  .btn{width:100%}
  .footer__cta{width:auto}
  .status-bar{font-size:11px;padding:8px 14px}
}

/* ---------- 16. 减少动效 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.01ms!important;
    animation-iteration-count:1!important;
    transition-duration:.01ms!important;
  }
  html.js [data-reveal]{
    opacity:1;
    transform:none;
  }
  .btn:hover{transform:none}
  .footer__list a:hover{transform:none}
}