/* ============================================================
   欧亿赛事 · 共享样式表 /assets/site.css
   DNA：非对称编辑部版式 · 框架式导航 · 深夜靛 + 荧光青 + 活力橙
   ============================================================ */

/* ---------- 1. 设计令牌 ---------- */
:root{
  --ink:#0A1030;
  --ink-deep:#070B22;
  --panel:#141C46;
  --line:#2A3568;
  --paper:#E8EDF6;
  --muted:#9AA6C4;
  --cyan:#24E0D2;
  --orange:#FF7A2F;
  --violet:#7B3DFF;
  --magenta:#C42D6E;
  --moss:#3FA37A;
  --clay:#C8A97E;

  --header-h:56px;
  --rail-w:96px;
  --status-h:40px;

  --font-display:"Oswald","Barlow Condensed","Source Han Sans SC","Noto Sans SC","PingFang SC",system-ui,sans-serif;
  --font-body:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"IBM Plex Mono","JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --pad-x:clamp(20px,4vw,64px);
  --maxw:1280px;
  --ease:cubic-bezier(.2,.7,.3,1);
}

/* ---------- 2. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:calc(var(--header-h) + 20px)}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,blockquote,dl,dd,hr{margin:0}
ul,ol{list-style:none;padding:0}
img,svg,video{display:block;max-width:100%}
img{height:auto}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;padding:0;cursor:pointer}
table{border-collapse:collapse;width:100%}
hr{border:0}

/* ---------- 3. 中文排版基线 ---------- */
body{
  min-height:100vh;
  background-color:var(--ink);
  color:var(--paper);
  font-family:var(--font-body);
  font-size:16px;
  font-weight:400;
  line-height:1.75;
  letter-spacing:.01em;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
h1,h2,h3,h4{font-family:var(--font-display);font-weight:600;line-height:1.1;letter-spacing:-.01em;color:var(--paper)}
.h1{font-size:clamp(40px,7vw,96px);line-height:1.02}
.h2{font-size:clamp(28px,4vw,52px)}
.h3{font-size:clamp(20px,2.4vw,30px);line-height:1.2}
.num{font-family:var(--font-mono);font-weight:600;font-variant-numeric:tabular-nums;letter-spacing:-.01em}
::selection{background:var(--cyan);color:var(--ink)}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px}

/* ---------- 4. 跳转链接 ---------- */
.skip-link{
  position:fixed;top:0;left:0;z-index:200;
  transform:translateY(-130%);
  background:var(--cyan);color:var(--ink);
  font-size:13px;font-weight:700;letter-spacing:.06em;
  padding:10px 18px;
  transition:transform .18s var(--ease);
}
.skip-link:focus{transform:translateY(0)}

/* ---------- 5. 顶部框架 ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;
  height:var(--header-h);
  display:grid;
  grid-template-columns:var(--rail-w) minmax(0,1fr) auto;
  align-items:center;
  background:rgba(10,16,48,.94);
  border-bottom:1px solid var(--line);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  z-index:80;
}
.frame-corner{
  align-self:stretch;
  display:flex;flex-direction:column;justify-content:center;
  padding:0 12px;
  border-right:1px solid var(--line);
  background:linear-gradient(180deg,rgba(36,224,210,.09),rgba(36,224,210,0) 85%);
}
.brand{display:block;line-height:1.1}
.brand__name{
  display:block;
  font-family:var(--font-display);
  font-size:13px;font-weight:600;letter-spacing:.08em;
  color:var(--paper);
}
.brand__sub{
  display:block;margin-top:3px;
  font-family:var(--font-mono);
  font-size:9px;letter-spacing:.14em;
  color:var(--muted);
}
.top-tabs{
  align-self:stretch;
  display:flex;align-items:stretch;
  min-width:0;overflow-x:auto;
  scrollbar-width:none;
}
.top-tabs::-webkit-scrollbar{display:none}
.top-tabs__list{display:flex;align-items:stretch;height:100%}
.top-tabs__list>li{display:flex;align-items:stretch}
.nav-link{
  display:flex;align-items:center;height:100%;
  padding:0 17px;
  font-size:14px;letter-spacing:.02em;white-space:nowrap;
  color:var(--muted);
  border-bottom:2px solid transparent;
  transition:color .18s var(--ease),background .18s var(--ease),border-color .18s var(--ease);
}
.nav-link:hover{color:var(--paper);background:rgba(36,224,210,.07)}
.nav-link[aria-current="page"]{
  color:var(--paper);
  border-bottom-color:var(--cyan);
  background:linear-gradient(180deg,rgba(36,224,210,0),rgba(36,224,210,.09));
}
.header-tools{
  align-self:stretch;
  display:flex;align-items:center;gap:10px;
  padding:0 16px;
  border-left:1px solid var(--line);
}

/* ---------- 6. 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-family:var(--font-body);
  font-size:14px;font-weight:500;letter-spacing:.04em;line-height:1;
  padding:12px 20px;border-radius:0;
  border:1px solid var(--line);
  background:transparent;color:var(--paper);
  white-space:nowrap;
  transition:background .18s var(--ease),border-color .18s var(--ease),color .18s var(--ease),transform .12s var(--ease);
}
.btn:hover{border-color:var(--cyan);color:var(--cyan)}
.btn:active{transform:translateY(1px)}
.btn--primary{background:var(--orange);border-color:var(--orange);color:var(--ink);font-weight:700}
.btn--primary:hover{background:#ff9151;border-color:#ff9151;color:var(--ink)}
.btn--ghost{border-color:rgba(36,224,210,.42);color:var(--cyan)}
.btn--ghost:hover{background:rgba(36,224,210,.1)}
.btn--sm{padding:8px 14px;font-size:13px}

/* ---------- 7. 移动菜单按钮 ---------- */
.nav-toggle{
  display:none;align-items:center;gap:8px;
  padding:8px 12px;
  border:1px solid var(--line);
  color:var(--paper);font-size:13px;letter-spacing:.08em;
  transition:border-color .18s var(--ease),color .18s var(--ease);
}
.nav-toggle:hover{border-color:var(--cyan);color:var(--cyan)}
.nav-toggle[aria-expanded="true"]{border-color:var(--cyan);color:var(--cyan)}
.nav-toggle__bars{display:flex;flex-direction:column;gap:3px;width:16px}
.nav-toggle__bars i{display:block;height:1.5px;background:currentColor;transition:transform .2s var(--ease),opacity .2s var(--ease)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(1){transform:translateY(4.5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(3){transform:translateY(-4.5px) rotate(-45deg)}

/* ---------- 8. 左侧窄栏 ---------- */
.side-rail{
  position:fixed;top:var(--header-h);left:0;bottom:0;
  width:var(--rail-w);
  display:flex;flex-direction:column;justify-content:space-between;
  padding:18px 10px 22px;
  border-right:1px solid var(--line);
  background:linear-gradient(180deg,rgba(20,28,70,.72),rgba(10,16,48,.24));
  z-index:50;
}
.rail-block{
  display:flex;flex-direction:column;align-items:center;gap:8px;
  width:100%;
}
.rail-block--grow{flex:1 1 auto;min-height:0}
.rail-key{
  font-family:var(--font-mono);
  font-size:9px;font-weight:500;letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--line);
}
.rail-value{
  font-family:var(--font-mono);
  font-size:13px;font-weight:600;letter-spacing:-.01em;
  color:var(--paper);
}
.rail-value--sm{font-size:11px;color:var(--cyan)}
.rail-scale{
  display:flex;flex-direction:column;align-items:center;
  gap:4px;width:100%;flex:1 1 auto;justify-content:center;
}
.rail-scale span{
  display:block;width:28px;height:2px;
  background:var(--line);
  transition:background .25s var(--ease),box-shadow .25s var(--ease);
}
.rail-scale span.is-lit{
  background:var(--cyan);
  box-shadow:0 0 8px rgba(36,224,210,.55);
}
.rail-dots{
  display:grid;
  grid-template-columns:repeat(3,10px);
  gap:7px;justify-content:center;
}
.rail-dots li{width:10px;height:10px;background:var(--c,var(--line));opacity:.82}

/* ---------- 9. 内容偏移 ---------- */
#main-content{
  padding-top:var(--header-h);
  padding-left:var(--rail-w);
  min-height:60vh;
}

/* ---------- 10. 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:88px;
  padding-top:64px;
  padding-left:var(--rail-w);
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,var(--ink) 0%,var(--ink-deep) 100%);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.15fr .85fr .85fr 1.2fr;
  gap:40px 40px;
  max-width:var(--maxw);
  padding:0 var(--pad-x);
}
.footer-col{min-width:0}
.footer-col--brand{position:relative;padding-left:14px;border-left:2px solid var(--clay)}
.footer-brand{
  font-family:var(--font-display);
  font-size:22px;font-weight:600;letter-spacing:.06em;
  color:var(--paper);line-height:1.2;
  margin-bottom:12px;
}
.footer-col__title{
  font-family:var(--font-mono);
  font-size:11px;font-weight:500;letter-spacing:.2em;text-transform:uppercase;
  color:var(--cyan);
  padding-bottom:10px;margin-bottom:14px;
  border-bottom:1px solid var(--line);
}
.footer-links li+li{margin-top:8px}
.footer-links a{
  font-size:14px;color:var(--muted);
  transition:color .18s var(--ease);
}
.footer-links a:hover{color:var(--cyan)}
.footer-note{
  font-size:13px;line-height:1.8;color:var(--muted);
  max-width:30ch;
}
.footer-note+.footer-note{margin-top:8px}
.footer-note--mono{font-family:var(--font-mono);font-size:12px;letter-spacing:.02em}
.footer-col--contact .footer-note{max-width:34ch}
.footer-base{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:14px 24px;
  margin-top:56px;
  padding:18px var(--pad-x) 26px;
  border-top:1px solid var(--line);
}
.footer-legal{display:flex;flex-wrap:wrap;gap:10px 22px}
.footer-legal a{font-size:12.5px;color:var(--muted);transition:color .18s var(--ease)}
.footer-legal a:hover{color:var(--cyan)}
.footer-stamp{
  display:flex;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;
}
.footer-stamp__k{color:var(--line)}
.footer-stamp__v{color:var(--cyan);font-weight:600}

/* ---------- 11. 通用容器与排版组件 ---------- */
.wrap{
  width:100%;max-width:var(--maxw);
  margin-left:0;margin-right:auto;
  padding-inline:var(--pad-x);
}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font-mono);
  font-size:12px;font-weight:500;letter-spacing:.2em;text-transform:uppercase;
  color:var(--cyan);
}
.sec-title{
  font-family:var(--font-display);
  font-size:clamp(26px,3.4vw,44px);
  line-height:1.1;letter-spacing:-.01em;
}
.lead{
  font-size:clamp(17px,1.6vw,20px);
  line-height:1.7;color:var(--muted);
  max-width:34em;
}
.prose{
  max-width:68ch;
  font-size:17px;line-height:1.78;
  color:var(--paper);
}
.prose p+p{margin-top:1.1em}
.prose h2{margin:2.2em 0 .7em;font-size:clamp(22px,2.4vw,30px)}
.prose h3{margin:1.8em 0 .6em;font-size:19px}
.prose ul{margin:1.1em 0;padding-left:1.1em;list-style:none}
.prose ul li{position:relative;padding-left:16px;margin-top:.5em;color:var(--muted)}
.prose ul li::before{
  content:"";position:absolute;left:0;top:.75em;
  width:8px;height:1px;background:var(--cyan);
}
.prose blockquote{
  margin:1.6em 0;padding:4px 0 4px 18px;
  border-left:2px solid var(--clay);
  color:var(--muted);
}
.prose strong{color:var(--paper);font-weight:600}
.divider{height:1px;background:var(--line);border:0;margin:0}
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-family:var(--font-mono);
  font-size:12px;letter-spacing:.08em;color:var(--muted);
}
.breadcrumb li{display:flex;align-items:center;gap:8px}
.breadcrumb li+li::before{content:"/";color:var(--line)}
.breadcrumb a{transition:color .18s var(--ease)}
.breadcrumb a:hover{color:var(--cyan)}
.breadcrumb [aria-current="page"]{color:var(--paper)}

/* ---------- 12. 网格与卡片 ---------- */
.grid{display:grid;gap:24px}
.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))}
.card{
  position:relative;
  background:var(--panel);
  border:1px solid var(--line);
  padding:20px;
  transition:transform .18s ease-out,border-color .18s ease-out,box-shadow .18s ease-out;
}
.card:hover{
  transform:translateY(-6px);
  border-color:var(--cyan);
  box-shadow:0 12px 30px rgba(0,0,0,.42);
}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  font-family:var(--font-mono);
  font-size:11px;font-weight:500;letter-spacing:.12em;text-transform:uppercase;
  padding:4px 8px;border:1px solid var(--line);color:var(--muted);
}
.tag--cyan{color:var(--cyan);border-color:rgba(36,224,210,.42)}
.tag--orange{color:var(--orange);border-color:rgba(255,122,47,.42)}
.tag--moss{color:var(--moss);border-color:rgba(63,163,122,.42)}
.tag--clay{color:var(--clay);border-color:rgba(200,169,126,.42)}
.stat{
  display:flex;flex-direction:column;gap:2px;
  padding:12px 14px;
  border-left:2px solid var(--cyan);
  background:rgba(20,28,70,.66);
}
.stat__k{
  font-family:var(--font-mono);
  font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);
}
.stat__v{
  font-family:var(--font-mono);
  font-size:22px;font-weight:600;font-variant-numeric:tabular-nums;
  color:var(--paper);line-height:1.25;
}

/* ---------- 13. 响应式图片容器 ---------- */
.media{
  position:relative;display:block;width:100%;
  overflow:hidden;
  background:var(--panel);
  border:1px solid var(--line);
  aspect-ratio:16/9;
}
.media>img,.media>svg{width:100%;height:100%;object-fit:cover}
.media--court{aspect-ratio:4/3}
.media--wide{aspect-ratio:21/9}
.media--tall{aspect-ratio:3/4}
.media--square{aspect-ratio:1/1}
.media--court::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(42,53,104,.85) 1px,transparent 1px),
    linear-gradient(90deg,rgba(42,53,104,.85) 1px,transparent 1px);
  background-size:8.3333% 12.5%;
  opacity:.5;
}
.media__cap{
  position:absolute;left:0;bottom:0;right:0;
  padding:8px 12px;
  font-family:var(--font-mono);
  font-size:11px;letter-spacing:.12em;text-transform:uppercase;
  color:var(--paper);
  background:linear-gradient(0deg,rgba(7,11,34,.9),rgba(7,11,34,0));
}

/* ---------- 14. 滚动显现协议 ---------- */
[data-reveal]{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .5s var(--ease),transform .5s var(--ease);
}
[data-reveal].is-visible{opacity:1;transform:none}

/* ---------- 15. 平板断点 ---------- */
@media (max-width:1024px){
  .grid--4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1.2fr 1fr 1fr;gap:36px 28px}
  .footer-col--contact{grid-column:1/-1}
  .footer-col--contact .footer-note{max-width:46ch}
}

/* ---------- 16. 移动端断点 ---------- */
@media (max-width:900px){
  .site-header{grid-template-columns:minmax(0,1fr) auto}
  .frame-corner{padding:0 14px}
  .nav-toggle{display:inline-flex}

  .top-tabs{
    position:fixed;
    top:var(--header-h);left:0;right:0;
    align-self:auto;
    flex-direction:column;
    max-height:calc(100vh - var(--header-h));
    overflow-y:auto;
    background:var(--panel);
    border-bottom:1px solid var(--line);
    box-shadow:0 24px 48px rgba(0,0,0,.5);
    opacity:0;visibility:hidden;pointer-events:none;
    transform:translateY(-10px);
    transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s linear;
    z-index:70;
  }
  .top-tabs[data-open="true"]{
    opacity:1;visibility:visible;pointer-events:auto;transform:translateY(0);
  }
  .top-tabs__list{flex-direction:column;height:auto}
  .top-tabs__list>li{border-bottom:1px solid var(--line)}
  .top-tabs__list>li:last-child{border-bottom:0}
  .nav-link{height:auto;padding:15px 20px;font-size:15px;border-bottom:0;border-left:3px solid transparent}
  .nav-link[aria-current="page"]{
    border-bottom:0;
    border-left-color:var(--cyan);
    background:linear-gradient(90deg,rgba(36,224,210,.12),rgba(36,224,210,0));
  }

  .side-rail{
    top:var(--header-h);left:0;right:0;bottom:auto;
    width:auto;height:var(--status-h);
    flex-direction:row;align-items:center;gap:14px;
    padding:0 var(--pad-x);
    border-right:0;border-bottom:1px solid var(--line);
    background:rgba(20,28,70,.94);
    -webkit-backdrop-filter:blur(10px);
    backdrop-filter:blur(10px);
    overflow:hidden;
  }
  .rail-block{flex-direction:row;align-items:center;gap:7px;width:auto}
  .rail-block--grow{flex:1 1 auto;min-width:0}
  .rail-scale{flex-direction:row;gap:3px;width:auto;min-width:0}
  .rail-scale span{flex:1 1 0;min-width:2px;width:auto;height:12px}
  .rail-dots{display:none}

  #main-content{padding-left:0;padding-top:calc(var(--header-h) + var(--status-h))}
  .site-footer{padding-left:0;margin-top:56px;padding-top:44px}
  .footer-base{padding-inline:var(--pad-x)}
  .wrap{padding-inline:var(--pad-x)}
}

/* ---------- 17. 小屏断点 ---------- */
@media (max-width:620px){
  .grid--2,.grid--3,.grid--4{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .header-tools .btn--primary{padding:8px 11px;font-size:12px}
  .nav-toggle__text{display:none}
  .brand__sub{letter-spacing:.1em}
  .footer-stamp{font-size:10px}
}

/* ---------- 18. 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;
    scroll-behavior:auto !important;
  }
  [data-reveal]{opacity:1;transform:none}
  .card:hover{transform:none}
  .rail-scale span.is-lit{box-shadow:none}
}