/* ============================================================
   悦盈体育 · 全站共享样式 /assets/site.css
   高原竞技数据台：夜空深蓝画布 + 左侧数据轨道导航
   ============================================================ */

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,h6,p,ul,ol,li,figure,blockquote,dl,dd{margin:0}
ul,ol{list-style:none;padding:0}
img,svg,video{display:block;max-width:100%;height:auto}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
a{color:inherit;text-decoration:none}
table{border-collapse:collapse;width:100%}
strong{font-weight:700}

/* ---------- tokens ---------- */
:root{
  --night:#0A102C;
  --panel:#121A3A;
  --blue:#2E7CF6;
  --snow:#F4F7FF;
  --red:#E4573D;
  --green:#2FA66A;
  --yellow:#F4C95D;
  --cloud:#A9B4D0;
  --line:#2A3457;
  --gold:#D9A441;

  --font-serif:"Noto Serif SC","Source Han Serif SC","Songti SC","STSong",serif;
  --font-sans:"Inter","Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --rail-w:104px;
  --topbar-h:60px;
  --wrap:1180px;
  --r-lg:28px;
  --r-md:18px;
  --r-pill:999px;
  --ease:cubic-bezier(.22,.61,.36,1);
}
@media (min-width:900px){:root{--topbar-h:68px}}

/* ---------- base ---------- */
body{
  background:var(--night);
  color:var(--snow);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.012em;
  padding-top:var(--topbar-h);
  min-height:100vh;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
@media (min-width:900px){body{padding-left:var(--rail-w);font-size:17px}}
@media (min-width:1360px){body{font-size:18px}}

h1,h2,h3,h4{font-family:var(--font-serif);font-weight:700;line-height:1.24;letter-spacing:.008em}
h1{font-size:clamp(38px,5.6vw,64px)}
h2{font-size:clamp(28px,3.4vw,36px)}
h3{font-size:clamp(20px,2vw,24px)}
h4{font-size:18px}
p{color:var(--cloud)}
p strong,p b{color:var(--snow)}

:focus-visible{outline:2px solid var(--yellow);outline-offset:3px;border-radius:8px}

::selection{background:rgba(46,124,246,.4);color:#fff}

/* ---------- utilities ---------- */
.visually-hidden{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:-.01em}
.divider{height:1px;border:0;background:var(--line)}

.wrap{width:100%;max-width:var(--wrap);margin-inline:auto;padding-inline:clamp(20px,4vw,48px)}

.stack{display:flex;flex-direction:column;gap:14px}

.grid{display:grid;gap:clamp(18px,2.4vw,30px);grid-template-columns:1fr}
.grid--2,.grid--3{grid-template-columns:1fr}
@media (min-width:680px){
  .grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (min-width:1000px){
  .grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
}

/* ---------- skip link ---------- */
.skip-link{
  position:fixed;
  top:10px;left:10px;z-index:200;
  transform:translateY(-180%);
  background:var(--yellow);color:var(--night);
  padding:10px 20px;border-radius:var(--r-pill);
  font-size:14px;font-weight:700;letter-spacing:.04em;
  transition:transform .22s var(--ease);
}
.skip-link:focus{transform:none}

/* ---------- header shell ---------- */
.site-header{position:relative;z-index:70}

.topbar{
  position:fixed;top:0;left:0;right:0;height:var(--topbar-h);
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding-inline:clamp(16px,3vw,36px);
  background:rgba(10,16,44,.9);
  -webkit-backdrop-filter:blur(16px);
  backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line);
  z-index:70;
}
@media (min-width:900px){.topbar{left:var(--rail-w)}}

.brand{display:inline-flex;align-items:center;gap:12px;min-width:0}
.brand__glyph{
  flex:0 0 38px;width:38px;height:38px;display:grid;place-items:center;
  border-radius:12px;
  background:linear-gradient(140deg,var(--blue),#1B4FA8);
  font-family:var(--font-serif);font-size:20px;color:#fff;
  box-shadow:0 8px 22px rgba(46,124,246,.3);
}
.brand__meta{display:flex;flex-direction:column;min-width:0;line-height:1.2}
.brand__name{font-family:var(--font-serif);font-size:17px;font-weight:700;letter-spacing:.08em;white-space:nowrap}
.brand__sub{font-family:var(--font-mono);font-size:10px;letter-spacing:.22em;color:var(--cloud);white-space:nowrap}

.topbar__actions{display:flex;align-items:center;gap:clamp(10px,1.6vw,22px)}

.utility-link{
  position:relative;
  font-size:14.5px;color:var(--cloud);
  padding:6px 2px;
  transition:color .22s var(--ease);
}
.utility-link::after{
  content:"";position:absolute;left:0;right:100%;bottom:2px;height:1px;
  background:var(--blue);transition:right .28s var(--ease);
}
.utility-link:hover{color:var(--snow)}
.utility-link:hover::after{right:0}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:11px 22px;border-radius:var(--r-pill);
  font-size:15px;font-weight:600;letter-spacing:.02em;
  border:1px solid transparent;white-space:nowrap;
  transition:background .24s var(--ease),color .24s var(--ease),border-color .24s var(--ease),transform .24s var(--ease);
}
.btn--primary{background:var(--blue);color:#fff;box-shadow:0 10px 26px rgba(46,124,246,.28)}
.btn--primary:hover{background:#4A90F8;transform:translateY(-1px)}
.btn--ghost{border-color:var(--line);color:var(--snow)}
.btn--ghost:hover{border-color:var(--blue);background:rgba(46,124,246,.14);color:#fff}
.btn--quiet{padding:0;color:var(--blue);font-weight:600}
.btn--quiet:hover{color:var(--yellow)}

/* ---------- nav toggle ---------- */
.nav-toggle{
  display:none;align-items:center;gap:10px;
  padding:9px 16px;border-radius:var(--r-pill);
  border:1px solid var(--line);color:var(--snow);
  font-size:14px;letter-spacing:.06em;
  transition:border-color .24s var(--ease),background .24s var(--ease);
}
.nav-toggle:hover{border-color:var(--blue);background:rgba(46,124,246,.12)}
.nav-toggle__bars{position:relative;display:block;width:16px;height:9px}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";position:absolute;left:0;width:100%;height:1.5px;
  background:currentColor;border-radius:2px;
  transition:transform .26s var(--ease),top .26s var(--ease);
}
.nav-toggle__bars::before{top:0}
.nav-toggle__bars::after{top:7.5px}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{top:3.7px;transform:rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{top:3.7px;transform:rotate(-45deg)}

/* ---------- rail navigation (desktop) ---------- */
.rail{
  position:fixed;top:0;left:0;bottom:0;width:var(--rail-w);
  display:flex;flex-direction:column;align-items:center;
  padding:0 0 20px;
  background:linear-gradient(180deg,#0B1233 0%,var(--panel) 100%);
  border-right:1px solid var(--line);
  overflow:hidden;
  z-index:65;
}
.rail__head{display:grid;place-items:center;padding:20px 0 8px}
.rail__dot{width:8px;height:8px;border-radius:50%;background:var(--blue);box-shadow:0 0 0 5px rgba(46,124,246,.15)}

.rail__list{
  flex:1 1 auto;min-height:0;width:100%;
  display:flex;flex-direction:column;align-items:center;gap:4px;
  overflow-y:auto;overflow-x:hidden;
  padding:6px 0 10px;
  scrollbar-width:none;
}
.rail__list::-webkit-scrollbar{display:none}

.rail__item{display:flex;justify-content:center;width:100%}

.rail__link{
  position:relative;
  display:flex;flex-direction:column;align-items:center;gap:9px;
  padding:13px 9px;border-radius:20px;
  color:var(--cloud);
  transition:color .24s var(--ease),background .24s var(--ease),box-shadow .24s var(--ease);
}
.rail__index{font-family:var(--font-mono);font-size:10.5px;letter-spacing:0;color:var(--blue);transition:color .24s var(--ease)}
.rail__label{
  writing-mode:vertical-rl;text-orientation:upright;
  font-size:14px;line-height:1.1;letter-spacing:.16em;
}
.rail__link:hover{color:var(--snow);background:rgba(46,124,246,.11)}
.rail__link[aria-current="page"]{
  color:var(--snow);
  background:rgba(46,124,246,.18);
  box-shadow:inset 0 0 0 1px rgba(46,124,246,.5);
}
.rail__link[aria-current="page"] .rail__index{color:var(--yellow)}
.rail__link[aria-current="page"] .rail__label{font-weight:600}

.rail__foot{flex:0 0 auto;padding:14px 0 4px}
.rail__foot-text{
  writing-mode:vertical-rl;text-orientation:upright;
  font-family:var(--font-mono);font-size:9.5px;letter-spacing:.3em;
  color:rgba(169,180,208,.45);
}

.rail__progress{
  position:absolute;top:0;right:0;width:2px;height:100%;
  background:rgba(42,52,87,.65);
}
.rail__progress-bar{
  display:block;width:100%;height:100%;
  background:linear-gradient(180deg,var(--blue),var(--yellow));
  transform:scaleY(0);transform-origin:top center;
}

/* ---------- scrim ---------- */
.nav-scrim{
  position:fixed;inset:0;z-index:64;display:none;
  background:rgba(4,7,22,.68);
  -webkit-backdrop-filter:blur(3px);
  backdrop-filter:blur(3px);
  opacity:0;pointer-events:none;
  transition:opacity .3s var(--ease);
}
.nav-scrim[data-open]{opacity:1;pointer-events:auto}

/* ---------- rail as mobile drawer ---------- */
@media (max-width:899px){
  .nav-scrim{display:block}
  .nav-toggle{display:inline-flex}
  .utility-link{display:none}

  .rail{
    top:0;bottom:0;left:0;right:auto;
    width:min(86vw,340px);
    align-items:stretch;
    padding:calc(var(--topbar-h) + 18px) 22px 26px;
    border-right:1px solid var(--line);
    border-radius:0 var(--r-lg) var(--r-lg) 0;
    transform:translateX(-103%);
    transition:transform .34s var(--ease);
    box-shadow:26px 0 70px rgba(0,0,0,.5);
    overflow-y:auto;
    z-index:66;
  }
  .rail[data-open]{transform:none}
  .rail__head{display:none}
  .rail__list{align-items:stretch;gap:2px;padding:0;overflow:visible}
  .rail__item{justify-content:flex-start}
  .rail__link{
    flex-direction:row;align-items:baseline;justify-content:flex-start;
    gap:14px;padding:14px 16px;border-radius:14px;font-size:16px;
  }
  .rail__label{writing-mode:horizontal-tb;text-orientation:initial;letter-spacing:.08em;font-size:16px}
  .rail__index{font-size:12px}
  .rail__foot{padding:20px 16px 0;display:flex}
  .rail__foot-text{writing-mode:horizontal-tb;text-orientation:initial;letter-spacing:.24em}
  .rail__progress{display:none}
}

@media (max-width:640px){
  .topbar .btn--primary{display:none}
  .brand__sub{display:none}
  .brand__glyph{flex-basis:34px;width:34px;height:34px;font-size:18px;border-radius:10px}
}

/* ---------- sections & headings ---------- */
.section{position:relative;padding-block:clamp(48px,7vw,96px)}
.section--panel{background:var(--panel)}
.section--band{background:linear-gradient(180deg,rgba(46,124,246,.1),rgba(46,124,246,0) 72%)}

.section__head{max-width:70ch}
.eyebrow{
  display:flex;align-items:center;gap:12px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.28em;text-transform:uppercase;
  color:var(--blue);
}
.eyebrow::before{content:"";width:26px;height:2px;border-radius:2px;background:currentColor}
.section__title{margin-top:12px}
.lede{margin-top:14px;font-size:clamp(16px,1.1vw,18px);color:var(--cloud);max-width:64ch}

/* ---------- breadcrumb ---------- */
.breadcrumb{padding-top:clamp(22px,3vw,36px)}
.breadcrumb__list{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-family:var(--font-mono);font-size:12.5px;color:var(--cloud)}
.breadcrumb__item{display:flex;align-items:center;gap:10px}
.breadcrumb__item+.breadcrumb__item::before{content:"·";color:var(--line)}
.breadcrumb__link{transition:color .2s var(--ease)}
.breadcrumb__link:hover{color:var(--snow)}
.breadcrumb__current{color:var(--snow)}

/* ---------- panel ---------- */
.panel{
  background:var(--panel);
  border:1px solid rgba(42,52,87,.85);
  border-radius:var(--r-lg);
  padding:clamp(20px,2.4vw,30px);
}
.panel__head{display:flex;flex-wrap:wrap;align-items:baseline;justify-content:space-between;gap:12px}
.panel__title{font-family:var(--font-serif);font-size:20px;font-weight:700}

/* ---------- stat ---------- */
.stat{display:flex;flex-direction:column;gap:6px}
.stat__value{
  font-family:var(--font-mono);font-variant-numeric:tabular-nums;
  font-size:clamp(40px,7vw,96px);font-weight:700;line-height:1;
  letter-spacing:-.03em;color:var(--snow);
}
.stat__label{font-size:14px;color:var(--cloud)}

/* ---------- tag ---------- */
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:var(--r-pill);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;
  background:rgba(169,180,208,.12);color:var(--cloud);
}
.tag--blue{background:rgba(46,124,246,.18);color:#93BCFF}
.tag--red{background:rgba(228,87,61,.18);color:#F39B89}
.tag--green{background:rgba(47,166,106,.18);color:#72D6A4}
.tag--yellow{background:rgba(244,201,93,.18);color:#F7DA8F}

/* ---------- media ---------- */
.media{
  position:relative;overflow:hidden;
  border-radius:var(--r-lg);
  background:linear-gradient(150deg,#16204A,#0A102C);
}
.media>img{width:100%;height:100%;object-fit:cover;display:block}
.media--banner{aspect-ratio:21/9}
.media--wide{aspect-ratio:16/9}
.media--square{aspect-ratio:1/1}
.media--tall{aspect-ratio:3/4}
.media__caption{
  position:absolute;left:0;right:0;bottom:0;
  padding:18px 20px;
  font-size:13px;color:var(--cloud);
  background:linear-gradient(180deg,rgba(10,16,44,0),rgba(10,16,44,.9));
}

/* ---------- footer ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(48px,7vw,96px);
  padding:clamp(44px,6vw,76px) 0 34px;
  background:linear-gradient(180deg,#0B1233,#070B1F);
  border-top:1px solid var(--line);
  overflow:hidden;
}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,rgba(46,124,246,0),var(--blue),var(--yellow),rgba(46,124,246,0));
  opacity:.55;
}

.footer__inner{
  width:100%;max-width:var(--wrap);margin-inline:auto;
  padding-inline:clamp(20px,4vw,48px);
  display:grid;grid-template-columns:1fr;gap:clamp(32px,4vw,56px);
}
@media (min-width:760px){
  .footer__inner{grid-template-columns:minmax(250px,1.05fr) 1.7fr}
}

.footer__brand{display:flex;flex-direction:column;align-items:flex-start;gap:14px}
.footer__glyph{
  width:44px;height:44px;display:grid;place-items:center;border-radius:14px;
  background:linear-gradient(140deg,var(--blue),#1B4FA8);
  font-family:var(--font-serif);font-size:22px;color:#fff;
}
.footer__name{font-family:var(--font-serif);font-size:20px;font-weight:700;letter-spacing:.1em;color:var(--snow)}
.footer__line{font-size:13.5px;color:var(--cloud)}
.footer__contact{display:flex;flex-direction:column;gap:7px;font-family:var(--font-mono);font-size:13px;color:var(--cloud);margin-top:4px}
.footer__contact li{word-break:break-word}

.footer__cols{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:clamp(24px,3vw,40px)}
.footer__col{min-width:0}
.footer__col-title{
  font-family:var(--font-mono);font-size:11.5px;font-weight:400;
  letter-spacing:.24em;text-transform:uppercase;color:var(--blue);
  margin-bottom:14px;
}
.footer__list{display:flex;flex-direction:column;gap:9px}
.footer__list a{
  font-size:14.5px;color:var(--cloud);
  transition:color .2s var(--ease),padding-left .2s var(--ease);
}
.footer__list a:hover{color:var(--snow);padding-left:4px}

.footer__base{
  width:100%;max-width:var(--wrap);margin:clamp(36px,4vw,56px) auto 0;
  padding:22px clamp(20px,4vw,48px) 0;
  border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:14px 28px;
  font-size:13px;color:var(--cloud);
}
.footer__legal{display:flex;flex-wrap:wrap;align-items:center;gap:8px 20px}
.footer__legal a{transition:color .2s var(--ease)}
.footer__legal a:hover{color:var(--snow)}
.footer__copy{font-family:var(--font-mono);font-size:12px;letter-spacing:.04em}

/* ---------- reveal ---------- */
html.js [data-reveal]{
  opacity:0;transform:translateY(16px);
  transition:opacity .55s var(--ease),transform .55s var(--ease);
}
html.js [data-reveal].is-visible{opacity:1;transform:none}

/* ---------- reduced motion ---------- */
@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 [data-reveal]{opacity:1;transform:none}
  .rail{transition:none}
}