/* ============================================================
   易倍体育 EMC · /assets/site.css
   共享外壳：reset / tokens / header / footer / 通用组件
   ============================================================ */

/* ---------- 1. reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{margin:0;padding:0;-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:calc(var(--header-h) + 24px)}
body{margin:0}
h1,h2,h3,h4,h5,h6,p,figure,blockquote,dl,dd{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img,svg{display:block;max-width:100%}
a{color:inherit}
button,input,select,textarea{font:inherit;color:inherit}
table{border-collapse:collapse;border-spacing:0}
hr{border:0}

/* ---------- 2. tokens ---------- */
:root{
  --c-ink:#0A2A20;
  --c-charcoal:#0B0F0E;
  --c-cyan:#37F2C6;
  --c-teal:#17A48B;
  --c-cream:#F5F2EA;
  --c-amber:#F2A93B;
  --c-mist:#8FA69C;
  --c-deep:#0F5448;
  --c-line:#2A3634;
  --c-red:#E4572E;

  --font-display:"Oswald","Archivo Narrow","Noto Sans SC","PingFang SC","Hiragino Sans GB",system-ui,sans-serif;
  --font-body:"Noto Sans SC","PingFang SC","Hiragino Sans GB",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"IBM Plex Mono","JetBrains Mono",SFMono-Regular,ui-monospace,"Menlo","Courier New",monospace;

  --rail-w:0px;
  --header-h:60px;
  --pad:clamp(18px,4vw,64px);
  --gutter:clamp(12px,1.6vw,24px);
  --shell:1440px;
  --radius:2px;
  --ease:cubic-bezier(.22,.61,.36,1);
}
@media (min-width:900px){:root{--header-h:70px}}

/* ---------- 3. 基础排版 ---------- */
body{
  background-color:var(--c-ink);
  background-image:
    radial-gradient(1100px 620px at 88% -12%, rgba(55,242,198,.10), transparent 62%),
    radial-gradient(900px 540px at -8% 34%, rgba(15,84,72,.40), transparent 66%);
  background-attachment:fixed;
  color:var(--c-cream);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  padding-left:var(--rail-w);
  min-height:100vh;
  overflow-x:hidden;
}
h1,h2,h3,h4,h5,h6{
  font-family:var(--font-display);
  font-weight:300;
  letter-spacing:.02em;
  line-height:1.12;
  text-transform:uppercase;
}
h1{font-size:clamp(48px,7vw,96px)}
h2{font-size:clamp(28px,4vw,40px)}
h3{font-size:clamp(20px,2.2vw,28px)}
strong{font-weight:600}
:focus-visible{outline:2px solid var(--c-cyan);outline-offset:2px;border-radius:1px}
::selection{background:var(--c-cyan);color:var(--c-charcoal)}
#main-content{scroll-margin-top:calc(var(--header-h) + 20px)}
main{position:relative;z-index:1;padding-top:var(--header-h)}
main.main-flush{padding-top:0}

.sr-only{position:absolute;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;top:-72px;left:14px;z-index:200;
  padding:12px 18px;background:var(--c-cyan);color:var(--c-charcoal);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.14em;text-decoration:none;
  border-radius:var(--radius);transition:top .2s var(--ease);
}
.skip-link:focus{top:14px}

/* ---------- 4. 顶栏 ---------- */
.site-header{
  position:fixed;top:0;right:0;left:0;z-index:100;
  color:var(--c-cream);
  background:linear-gradient(to bottom, rgba(10,42,32,.78), rgba(10,42,32,0));
  border-bottom:1px solid transparent;
  transition:background-color .28s var(--ease), border-color .28s var(--ease), box-shadow .28s var(--ease);
}
.site-header[data-scrolled],
.site-header[data-open]{
  background:rgba(10,42,32,.96);
  border-bottom-color:var(--c-line);
  box-shadow:0 16px 36px -28px #000;
}
.header-inner{
  max-width:var(--shell);margin-inline:auto;min-height:var(--header-h);
  display:flex;align-items:center;gap:clamp(10px,2vw,28px);
  padding-inline:var(--pad);
}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;text-decoration:none;color:var(--c-cream)}
.brand-word{font-family:var(--font-display);font-size:15px;font-weight:400;letter-spacing:.16em;text-transform:uppercase;white-space:nowrap}
.brand-dot{
  width:7px;height:7px;border-radius:50%;background:var(--c-cyan);
  box-shadow:0 0 0 3px rgba(55,242,198,.16),0 0 12px rgba(55,242,198,.7);
  animation:breathe 3.6s ease-in-out infinite;
}
@keyframes breathe{0%,100%{opacity:.55;transform:scale(.86)}50%{opacity:1;transform:scale(1)}}

.primary-nav{margin-left:auto}
.nav-list{display:flex;align-items:center;gap:clamp(10px,1.7vw,28px);counter-reset:nav-idx}
.nav-list > li{counter-increment:nav-idx}
.nav-link{
  position:relative;display:inline-block;padding:10px 2px 12px;
  font-size:14px;letter-spacing:.08em;text-decoration:none;white-space:nowrap;
  color:rgba(245,242,234,.76);transition:color .24s var(--ease);
}
.nav-link::before{
  content:counter(nav-idx,decimal-leading-zero);
  margin-right:7px;font-family:var(--font-mono);font-size:10px;letter-spacing:.08em;
  color:var(--c-mist);opacity:.8;vertical-align:.14em;
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:4px;height:1px;
  background:var(--c-cyan);transform:scaleX(0);transform-origin:left center;
  transition:transform .24s var(--ease);
}
.nav-link:hover,.nav-link:focus-visible{color:var(--c-cream)}
.nav-link:hover::after,.nav-link:focus-visible::after{transform:scaleX(1)}
.nav-link[aria-current="page"]{color:var(--c-cream)}
.nav-link[aria-current="page"]::after{transform:scaleX(1)}
.nav-link[aria-current="page"]::before{color:var(--c-cyan);opacity:1}

.header-utility{display:flex;align-items:center;gap:clamp(8px,1.4vw,18px);flex:0 0 auto;margin-left:clamp(8px,2vw,28px)}
.util-link{
  font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;text-decoration:none;
  color:var(--c-mist);background-image:linear-gradient(var(--c-cyan),var(--c-cyan));
  background-repeat:no-repeat;background-position:0 100%;background-size:0 1px;
  transition:color .24s var(--ease),background-size .24s var(--ease);
}
.util-link:hover,.util-link:focus-visible{color:var(--c-cyan);background-size:100% 1px}
.util-chip{
  font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;
  padding:7px 12px;background:transparent;color:var(--c-cream);
  border:1px solid var(--c-line);border-radius:var(--radius);cursor:pointer;
  transition:color .2s var(--ease),border-color .2s var(--ease),background-color .2s var(--ease);
}
.util-chip:hover{border-color:var(--c-teal);color:var(--c-cyan)}
.util-chip[aria-pressed="true"]{border-color:rgba(242,169,59,.7);color:var(--c-amber)}

.nav-toggle{
  display:none;position:relative;margin-left:auto;width:44px;height:44px;padding:0;
  background:transparent;border:1px solid var(--c-line);border-radius:var(--radius);cursor:pointer;
}
.nav-toggle-bar{position:absolute;left:12px;right:12px;height:1px;background:var(--c-cream);transition:transform .24s var(--ease),opacity .2s var(--ease)}
.nav-toggle-bar:nth-child(1){top:15px}
.nav-toggle-bar:nth-child(2){top:21px}
.nav-toggle-bar:nth-child(3){top:27px}
.site-header[data-open] .nav-toggle-bar:nth-child(1){transform:translateY(6px) rotate(45deg)}
.site-header[data-open] .nav-toggle-bar:nth-child(2){opacity:0}
.site-header[data-open] .nav-toggle-bar:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

.scroll-progress{
  position:absolute;left:0;right:0;bottom:-1px;height:2px;
  background:linear-gradient(90deg,var(--c-teal),var(--c-cyan));
  transform:scaleX(0);transform-origin:left center;opacity:0;
  transition:opacity .3s var(--ease);
}
.site-header[data-scrolled] .scroll-progress{opacity:1}

/* 移动端指标条 */
.metric-strip{display:none}
.metric-strip{display:none;gap:20px;align-items:center;padding:0 var(--pad) 10px;overflow-x:auto;-webkit-overflow-scrolling:touch}
.metric-item{display:inline-flex;align-items:baseline;gap:7px;flex:0 0 auto}
.metric-key{font-family:var(--font-mono);font-size:10px;letter-spacing:.16em;text-transform:uppercase;color:var(--c-mist)}
.metric-value{font-family:var(--font-mono);font-size:12px;font-variant-numeric:tabular-nums;color:var(--c-cream);white-space:nowrap}

/* ---------- 5. 桌面左侧数据轨道 ---------- */
.data-rail{display:none}
@media (min-width:1180px){
  :root{--rail-w:232px}
  .data-rail{
    display:flex;flex-direction:column;
    position:fixed;top:var(--header-h);left:0;bottom:0;width:var(--rail-w);z-index:80;
    padding:26px 20px 24px;
    background:var(--c-charcoal);
    border-right:1px solid var(--c-line);
    background-image:linear-gradient(180deg, rgba(15,84,72,.28), rgba(11,15,14,0) 55%);
  }
}
.rail-head{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:20px}
.rail-title{font-family:var(--font-mono);font-size:10px;letter-spacing:.18em;text-transform:uppercase;color:var(--c-mist)}
.rail-scope{font-family:var(--font-mono);font-size:10px;letter-spacing:.1em;color:var(--c-amber);border:1px solid rgba(242,169,59,.42);padding:3px 7px}
.rail-list{display:grid;gap:2px}
.rail-row{display:grid;gap:4px;padding:12px 0;border-bottom:1px solid rgba(42,54,52,.7)}
.rail-key{font-family:var(--font-mono);font-size:10px;letter-spacing:.16em;text-transform:uppercase;color:var(--c-mist)}
.rail-value{font-family:var(--font-mono);font-size:17px;font-variant-numeric:tabular-nums;color:var(--c-cyan);letter-spacing:-.01em}
.rail-bars{display:flex;align-items:flex-end;gap:4px;height:56px;margin:22px 0 18px}
.rail-bar{flex:1 1 auto;min-height:4px;opacity:.5;background:linear-gradient(to top,var(--c-teal),var(--c-cyan))}
.rail-bar:nth-child(1){height:38%}
.rail-bar:nth-child(2){height:62%}
.rail-bar:nth-child(3){height:44%}
.rail-bar:nth-child(4){height:78%}
.rail-bar:nth-child(5){height:56%}
.rail-bar:nth-child(6){height:86%}
.rail-bar:nth-child(7){height:66%}
.rail-bar:nth-child(8){height:96%;opacity:.95}
.rail-foot{
  margin-top:auto;display:flex;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:10px;line-height:1.5;letter-spacing:.06em;color:var(--c-mist);
  border-top:1px solid var(--c-line);padding-top:16px;
}
.rail-dot{width:5px;height:5px;border-radius:50%;background:var(--c-teal);flex:0 0 auto}

/* ---------- 6. 页脚 ---------- */
.site-footer{
  position:relative;margin-top:clamp(64px,9vw,140px);
  background-color:var(--c-charcoal);
  background-image:repeating-linear-gradient(90deg, rgba(42,54,52,.6) 0 1px, rgba(42,54,52,0) 1px 96px);
  border-top:1px solid var(--c-line);
  padding:clamp(44px,6vw,84px) 0 26px;
}
.site-footer::before{
  content:"";position:absolute;top:-1px;left:0;width:min(320px,42%);height:2px;
  background:linear-gradient(90deg,var(--c-cyan),rgba(55,242,198,0));
}
.footer-inner{
  max-width:var(--shell);margin-inline:auto;padding-inline:var(--pad);
  display:grid;grid-template-columns:1fr;gap:clamp(30px,4vw,54px);
}
.footer-brand{max-width:44ch}
.footer-wordmark{
  font-family:var(--font-display);font-size:clamp(28px,4.4vw,46px);font-weight:300;
  letter-spacing:.1em;text-transform:uppercase;line-height:1;margin-bottom:16px;color:var(--c-cream);
}
.footer-tagline{font-size:14px;color:rgba(245,242,234,.76);margin-bottom:14px}
.footer-meta{display:flex;align-items:center;gap:9px;font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;color:var(--c-mist)}
.footer-dot{width:6px;height:6px;border-radius:50%;background:var(--c-cyan);flex:0 0 auto;box-shadow:0 0 10px rgba(55,242,198,.6)}
.footer-col-title{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.2em;text-transform:uppercase;
  color:var(--c-teal);font-weight:400;margin-bottom:16px;
}
.footer-links{display:grid;gap:9px}
.footer-link{
  display:inline-block;font-size:14px;text-decoration:none;color:rgba(245,242,234,.78);
  background-image:linear-gradient(var(--c-cyan),var(--c-cyan));
  background-repeat:no-repeat;background-position:0 100%;background-size:0 1px;
  transition:color .24s var(--ease),background-size .24s var(--ease);
}
.footer-link:hover,.footer-link:focus-visible{color:var(--c-cyan);background-size:100% 1px}
.footer-contact{display:grid;gap:11px}
.contact-item{display:grid;grid-template-columns:52px 1fr;gap:10px;align-items:baseline}
.contact-key{font-family:var(--font-mono);font-size:10px;letter-spacing:.16em;text-transform:uppercase;color:var(--c-mist)}
.contact-value{font-family:var(--font-mono);font-size:13px;line-height:1.6;color:var(--c-cream);word-break:break-all}
.footer-bottom{
  max-width:var(--shell);margin:clamp(34px,5vw,68px) auto 0;padding:18px var(--pad) 0;
  border-top:1px solid var(--c-line);
  display:flex;flex-wrap:wrap;gap:10px 26px;align-items:center;justify-content:space-between;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;color:var(--c-mist);
}
.legal-line{color:var(--c-mist)}
.footer-copy{color:rgba(245,242,234,.7)}

/* ---------- 7. 布局与章节 ---------- */
.container{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:var(--pad)}
.container--narrow{max-width:880px}
.section{position:relative;padding-block:clamp(48px,7vw,110px)}
.section + .section{border-top:1px solid rgba(42,54,52,.55)}
.section-head{display:grid;gap:16px;max-width:64ch;margin-bottom:clamp(26px,3.4vw,52px)}
.section-title{font-size:clamp(28px,4vw,40px)}
.section-lede{font-size:16px;color:rgba(245,242,234,.78);max-width:42em}
.index-band{
  display:inline-flex;align-items:center;gap:12px;width:fit-content;
  background:var(--c-deep);color:var(--c-cream);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.16em;text-transform:uppercase;
  padding:8px 14px;border-radius:var(--radius);
}
.band-num{color:var(--c-cyan)}
.band-label{color:rgba(245,242,234,.88)}
.divider{height:1px;background:var(--c-line);margin-block:clamp(24px,3vw,48px)}
.prose{max-width:38em}
.prose p + p{margin-top:1em}

.grid-12{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:var(--gutter)}
.span-2{grid-column:span 2}
.span-3{grid-column:span 3}
.span-4{grid-column:span 4}
.span-6{grid-column:span 6}
.span-8{grid-column:span 8}
.span-9{grid-column:span 9}
.span-12{grid-column:span 12}

/* ---------- 8. 基础组件 ---------- */
.panel{
  background:rgba(11,15,14,.62);
  border:1px solid var(--c-line);
  border-radius:var(--radius);
  padding:clamp(18px,2.2vw,28px);
  transition:transform .24s var(--ease),border-color .24s var(--ease),box-shadow .24s var(--ease);
}
.panel:hover,.panel:focus-within{
  transform:translateY(-2px);
  border-color:rgba(55,242,198,.5);
  box-shadow:0 22px 44px -34px rgba(55,242,198,.85);
}
.stat{display:grid;gap:7px;padding:16px 0}
.stat-value{font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-size:clamp(28px,3.4vw,40px);line-height:1;color:var(--c-cyan)}
.stat-label{font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--c-mist)}
.stat-note{font-size:14px;color:rgba(245,242,234,.74);max-width:34em}
.tag{
  display:inline-block;font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;
  padding:5px 9px;border:1px solid var(--c-line);color:var(--c-mist);border-radius:var(--radius);
}
.tag--amber{border-color:rgba(242,169,59,.55);color:var(--c-amber)}
.chip{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;
  padding:8px 14px;background:transparent;color:var(--c-mist);
  border:1px solid var(--c-line);border-radius:var(--radius);cursor:pointer;
  transition:color .2s var(--ease),border-color .2s var(--ease),background-color .2s var(--ease);
}
.chip:hover{color:var(--c-cream);border-color:var(--c-teal)}
.chip[aria-pressed="true"],.chip.is-active{background:var(--c-cyan);border-color:var(--c-cyan);color:var(--c-charcoal)}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-family:var(--font-mono);font-size:13px;letter-spacing:.12em;text-transform:uppercase;
  padding:13px 22px;border:1px solid transparent;border-radius:var(--radius);
  text-decoration:none;cursor:pointer;
  transition:background-color .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.btn-primary{background:var(--c-cyan);color:#052019;font-weight:600}
.btn-primary:hover,.btn-primary:focus-visible{background:#63f8d5;color:#052019}
.btn-ghost{background:transparent;border-color:var(--c-line);color:var(--c-cream)}
.btn-ghost:hover,.btn-ghost:focus-visible{border-color:var(--c-cyan);color:var(--c-cyan)}
.btn-sm{padding:8px 14px;font-size:12px}

.table{width:100%;font-size:14px;text-align:left}
.table th,.table td{padding:14px 12px;border-bottom:1px solid var(--c-line);vertical-align:top}
.table th{font-family:var(--font-mono);font-size:11px;font-weight:400;letter-spacing:.16em;text-transform:uppercase;color:var(--c-mist)}
.table tbody tr{transition:background-color .2s var(--ease)}
.table tbody tr:hover{background:rgba(55,242,198,.05)}
.table td.num,.num{font-family:var(--font-mono);font-variant-numeric:tabular-nums}

.breadcrumb{padding:18px 0}
.breadcrumb-list{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;color:var(--c-mist)}
.breadcrumb-item{display:flex;align-items:center;gap:8px}
.breadcrumb-item + .breadcrumb-item::before{content:"/";color:var(--c-line)}
.breadcrumb-item a{text-decoration:none;color:var(--c-mist);transition:color .2s var(--ease)}
.breadcrumb-item a:hover{color:var(--c-cyan)}
.breadcrumb-item[aria-current="page"]{color:var(--c-cream)}

.figure{display:block;margin:0}
.figure-media{
  position:relative;overflow:hidden;border:1px solid var(--c-line);border-radius:var(--radius);
  aspect-ratio:16/9;
  background-color:var(--c-charcoal);
  background-image:
    linear-gradient(160deg, rgba(15,84,72,.6), rgba(11,15,14,.92)),
    radial-gradient(circle at 72% 18%, rgba(55,242,198,.18), transparent 58%);
}
.figure-media img{width:100%;height:100%;object-fit:cover}
.figure-media--wide{aspect-ratio:21/9}
.figure-media--tall{aspect-ratio:3/4}
.figure-cap{margin-top:10px;font-family:var(--font-mono);font-size:12px;line-height:1.6;letter-spacing:.06em;color:var(--c-mist)}

.note{
  border-left:2px solid var(--c-amber);
  padding:4px 0 4px 14px;
  font-size:14px;color:rgba(245,242,234,.82);max-width:42em;
}

/* ---------- 9. 显现动效 ---------- */
[data-reveal]{opacity:0;transform:translateY(14px);transition:opacity .24s var(--ease),transform .24s var(--ease)}
[data-reveal].is-visible{opacity:1;transform:none}

/* ---------- 10. 响应式 ---------- */
@media (max-width:1180px){
  .header-utility .util-link,.header-utility .util-chip{display:none}
}
@media (max-width:1023px){
  .grid-12{grid-template-columns:repeat(6,minmax(0,1fr))}
  .span-8,.span-9,.span-12{grid-column:1/-1}
  .span-6{grid-column:span 6}
  .span-3,.span-4{grid-column:span 3}
}
@media (max-width:899px){
  .nav-toggle{display:block}
  .primary-nav{
    position:fixed;top:var(--header-h);right:0;left:var(--rail-w);z-index:99;
    max-height:calc(100vh - var(--header-h));overflow-y:auto;
    padding:12px var(--pad) 30px;
    background:rgba(11,15,14,.985);
    border-top:1px solid var(--c-line);
    border-bottom:1px solid var(--c-deep);
    opacity:0;visibility:hidden;transform:translateY(-10px);
    transition:opacity .22s var(--ease),transform .22s var(--ease),visibility .22s var(--ease);
  }
  .site-header[data-open] .primary-nav{opacity:1;visibility:visible;transform:none}
  .nav-list{display:block}
  .nav-link{display:block;padding:16px 2px;border-bottom:1px solid rgba(42,54,52,.7);font-size:16px;letter-spacing:.06em}
  .nav-link::after{display:none}
  .nav-link[aria-current="page"]{color:var(--c-cyan)}
  .site-header[data-scrolled] .metric-strip,
  .site-header[data-open] .metric-strip{display:flex}
}
@media (max-width:760px){
  .footer-inner{grid-template-columns:1fr}
}
@media (min-width:761px){
  .footer-inner{grid-template-columns:1.4fr 1fr}
}
@media (min-width:1080px){
  .footer-inner{grid-template-columns:1.7fr 1fr 1.25fr}
}
@media (max-width:639px){
  .grid-12{grid-template-columns:1fr}
  .grid-12 > *{grid-column:1/-1}
  .header-utility{display:none}
  .contact-item{grid-template-columns:46px 1fr}
}

/* ---------- 11. 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;
  }
  [data-reveal]{opacity:1;transform:none}
}