/* ============================================================
   环亚体育 · 共享样式 /assets/site.css
   深靛蓝底 + 荧光青 / 活力橙 / 冠军金 / 电光紫
   ============================================================ */

/* ---------- 1. 变量 ---------- */
:root{
  --ink:#0B1130;
  --ink-2:#111A3E;
  --ink-3:#0D1533;
  --ink-0:#050814;
  --line:#1D2851;
  --line-strong:#2B3A73;
  --paper:#E8ECF4;
  --muted:#8A93A8;
  --cyan:#00E5C3;
  --cyan-deep:#073B38;
  --violet:#7B61FF;
  --orange:#FF7A1A;
  --orange-deep:#3A1B06;
  --gold:#F5C542;
  --shadow-hard:7px 7px 0 #050814;
  --font-head:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-body:var(--font-head);
  --font-mono:ui-monospace,"SFMono-Regular",Menlo,Consolas,"Liberation Mono","Courier New",monospace;
  --wrap:1320px;
  --pad:24px;
}

/* ---------- 2. 重置与基础排版 ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:150px}
body{
  margin:0;
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.72;
  letter-spacing:.01em;
  color:var(--paper);
  background-color:var(--ink);
  background-image:
    radial-gradient(1000px 520px at 92% -12%,rgba(123,97,255,.18),transparent 62%),
    radial-gradient(760px 460px at -8% 4%,rgba(0,229,195,.14),transparent 58%);
  background-repeat:no-repeat;
  -webkit-font-smoothing:antialiased;
}
main{display:block}
img{max-width:100%;height:auto;border:0}
h1,h2,h3,h4,h5{font-family:var(--font-head);font-weight:900;line-height:1.14;letter-spacing:.015em;margin:0 0 .6em}
h1{font-size:clamp(2rem,4.6vw,3.6rem)}
h2{font-size:clamp(1.5rem,2.6vw,2.25rem)}
h3{font-size:clamp(1.15rem,1.7vw,1.5rem);font-weight:800}
p{margin:0 0 1.05em}
strong{font-weight:700;color:#fff}
a{color:var(--cyan);text-decoration:none}
a:hover{text-decoration:underline;text-underline-offset:4px}
:focus-visible{outline:3px solid var(--gold);outline-offset:3px}
::selection{background:var(--cyan);color:var(--ink-0)}

/* ---------- 3. 工具类 ---------- */
.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding-left:var(--pad);padding-right:var(--pad)}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.06em}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.divider{border:0;border-top:2px solid var(--line);margin:clamp(28px,4vw,48px) 0}
.stack{display:grid;gap:16px}
.stack--sm{display:grid;gap:10px}

/* ---------- 4. 章节与文字组件 ---------- */
.section{padding:clamp(48px,7vw,96px) 0}
.section--tight{padding:clamp(28px,4vw,56px) 0}
.section__head{display:grid;gap:14px;max-width:64ch;margin:0 0 clamp(26px,4vw,44px)}
.section__title{margin:0}
.section__desc{margin:0;color:var(--muted);font-size:16.5px}
.eyebrow{display:inline-flex;align-items:center;gap:10px;margin:0;font-family:var(--font-mono);font-size:11.5px;letter-spacing:.24em;text-transform:uppercase;color:var(--cyan)}
.eyebrow::before{content:"";display:block;width:28px;height:2px;background:var(--cyan)}
.lede{font-size:clamp(1.05rem,1.6vw,1.3rem);line-height:1.66;color:#C4CDDF;margin:0 0 1.1em}
.tag{display:inline-flex;align-items:center;gap:6px;font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;padding:4px 9px;border:1px solid var(--line-strong);border-radius:2px;color:var(--muted);background:rgba(255,255,255,.02)}
.tag--cyan{color:var(--cyan);border-color:rgba(0,229,195,.5);background:rgba(0,229,195,.08)}
.tag--orange{color:var(--orange);border-color:rgba(255,122,26,.5);background:rgba(255,122,26,.08)}
.tag--gold{color:var(--gold);border-color:rgba(245,197,66,.5);background:rgba(245,197,66,.08)}
.tag--violet{color:#A99BFF;border-color:rgba(123,97,255,.55);background:rgba(123,97,255,.12)}
.link-arrow{display:inline-flex;align-items:center;gap:8px;font-weight:700;font-size:15px;color:var(--cyan);text-decoration:none}
.link-arrow::after{content:"→";font-family:var(--font-mono);transition:transform .16s ease}
.link-arrow:hover{text-decoration:none}
.link-arrow:hover::after{transform:translateX(4px)}

/* ---------- 5. 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-family:var(--font-head);font-weight:800;font-size:15px;letter-spacing:.04em;
  padding:12px 20px;border:2px solid var(--ink-0);border-radius:2px;
  background:var(--ink-2);color:var(--paper);text-decoration:none;cursor:pointer;
  box-shadow:4px 4px 0 var(--ink-0);
  transition:transform .14s ease,box-shadow .14s ease,background .16s ease,color .16s ease;
}
.btn:hover{text-decoration:none;transform:translate(-1px,-1px);box-shadow:6px 6px 0 var(--ink-0)}
.btn:active{transform:translate(2px,2px);box-shadow:2px 2px 0 var(--ink-0)}
.btn--primary{background:var(--cyan);color:var(--ink-0)}
.btn--primary:hover{background:#2FF2D6}
.btn--orange{background:var(--orange);color:#1B0A02}
.btn--orange:hover{background:#FF9450}
.btn--ghost{background:transparent;color:var(--cyan);border-color:var(--cyan);box-shadow:4px 4px 0 rgba(0,229,195,.25)}
.btn--ghost:hover{background:rgba(0,229,195,.1);box-shadow:6px 6px 0 rgba(0,229,195,.3)}
.btn--block{display:flex;width:100%}

/* ---------- 6. 栅格与面板 ---------- */
.grid{display:grid;gap:clamp(18px,2.4vw,28px)}
.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(0,1.35fr) minmax(0,1fr)}
.panel{
  background:var(--ink-2);border:2px solid var(--line);border-radius:3px;
  padding:clamp(20px,3vw,32px);box-shadow:var(--shadow-hard);
}
.panel--cyan{background:var(--cyan-deep);border-color:rgba(0,229,195,.5)}
.panel--orange{background:var(--orange-deep);border-color:rgba(255,122,26,.5)}
.panel__head{display:flex;align-items:baseline;justify-content:space-between;gap:16px;padding-bottom:14px;margin-bottom:18px;border-bottom:1px solid var(--line)}
.panel__title{margin:0;font-size:1.15rem}

/* ---------- 7. 数据列表 ---------- */
.data-list{margin:0;padding:0;display:grid;gap:0;list-style:none}
.data-list__row{display:grid;grid-template-columns:minmax(96px,auto) 1fr;gap:16px;align-items:baseline;padding:10px 0;border-bottom:1px dashed var(--line)}
.data-list__key{margin:0;font-family:var(--font-mono);font-size:11.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
.data-list__val{margin:0;font-size:15.5px;color:var(--paper)}

/* ---------- 8. 图片容器基础规则 ---------- */
.media{position:relative;margin:0;border:2px solid var(--ink-0);border-radius:2px;background:var(--ink-3);box-shadow:var(--shadow-hard);overflow:hidden}
.media__img{display:block;width:100%;height:auto;aspect-ratio:16 / 9;object-fit:cover;filter:saturate(1.05) contrast(1.04)}
.media--43 .media__img{aspect-ratio:4 / 3}
.media--11 .media__img{aspect-ratio:1 / 1}
.media--wide .media__img{aspect-ratio:21 / 9}
.media__cap{display:block;padding:10px 14px;background:var(--ink-0);border-top:1px solid var(--line);font-family:var(--font-mono);font-size:11.5px;letter-spacing:.08em;color:var(--muted)}

/* ---------- 9. 面包屑 ---------- */
.crumbs{padding:18px 0 0}
.crumbs__list{display:flex;flex-wrap:wrap;gap:8px;margin:0;padding:0;list-style:none;font-family:var(--font-mono);font-size:11.5px;letter-spacing:.12em;color:var(--muted)}
.crumbs__item{display:flex;align-items:center;gap:8px}
.crumbs__item:not(:last-child)::after{content:"/";color:var(--line-strong)}
.crumbs__item a{color:var(--muted);text-decoration:none}
.crumbs__item a:hover{color:var(--cyan);text-decoration:none}
.crumbs__item[aria-current="page"]{color:var(--paper)}

/* ---------- 10. 标签页 ---------- */
.tabs{display:grid;gap:20px}
.tabs__nav{display:flex;flex-wrap:wrap;gap:8px;padding-bottom:12px;border-bottom:2px solid var(--line)}
.tab{
  font-family:var(--font-mono);font-size:12.5px;letter-spacing:.12em;
  padding:9px 15px;background:var(--ink-2);color:var(--muted);
  border:2px solid var(--line);border-radius:2px;cursor:pointer;
  transition:color .16s ease,background .16s ease,border-color .16s ease,box-shadow .14s ease;
}
.tab:hover{color:var(--paper);border-color:var(--line-strong)}
.tab[aria-selected="true"]{background:var(--cyan);color:var(--ink-0);border-color:var(--cyan);box-shadow:3px 3px 0 var(--ink-0)}
.tabpanel{padding-top:4px}
.tabpanel[hidden]{display:none}

/* ---------- 11. 滚动显现 ---------- */
[data-reveal]{opacity:0;transform:translateY(16px);transition:opacity .5s ease,transform .5s cubic-bezier(.2,.7,.3,1)}
[data-reveal].is-inview{opacity:1;transform:none}

/* ---------- 12. 页头 ---------- */
.skip-link{
  position:fixed;top:-140px;left:16px;z-index:200;
  padding:12px 18px;background:var(--cyan);color:var(--ink-0);
  font-family:var(--font-mono);font-size:13px;font-weight:700;letter-spacing:.08em;
  border:2px solid var(--ink-0);border-radius:2px;box-shadow:var(--shadow-hard);text-decoration:none;
}
.skip-link:focus{top:16px;text-decoration:none}

.site-header{position:sticky;top:0;z-index:80;background:var(--ink);border-bottom:2px solid var(--ink-0);box-shadow:0 14px 34px -26px #000}

.header-top{background:var(--ink-0);border-bottom:1px solid var(--line)}
.header-top__inner{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:36px;padding-top:4px;padding-bottom:4px}
.header-top__lang{font-size:11px;letter-spacing:.22em;text-transform:uppercase;color:var(--muted)}
.util-list{display:flex;align-items:center;gap:6px;margin:0;padding:0;list-style:none}
.util-chip{display:inline-block;padding:3px 9px;border:1px solid transparent;border-radius:2px;font-family:var(--font-mono);font-size:11.5px;letter-spacing:.1em;color:var(--muted);text-decoration:none;transition:color .16s ease,border-color .16s ease,background .16s ease}
.util-chip:hover,.util-chip:focus-visible{color:var(--cyan);border-color:var(--cyan);background:rgba(0,229,195,.07);text-decoration:none}

.header-main__inner{display:flex;align-items:center;gap:24px;padding-top:12px;padding-bottom:12px}
.brand{display:inline-flex;align-items:center;gap:12px;flex:0 0 auto;color:var(--paper);text-decoration:none}
.brand:hover{text-decoration:none}
.brand__mark{
  display:grid;place-items:center;width:42px;height:42px;
  background:linear-gradient(135deg,var(--cyan),var(--violet));color:var(--ink-0);
  font-family:var(--font-head);font-weight:900;font-size:20px;line-height:1;
  border:2px solid var(--ink-0);box-shadow:4px 4px 0 rgba(0,229,195,.32);
}
.brand__text{display:flex;flex-direction:column;line-height:1.15}
.brand__name{font-family:var(--font-head);font-weight:900;font-size:19px;letter-spacing:.06em;color:var(--paper)}
.brand__domain{font-size:10.5px;letter-spacing:.14em;color:var(--muted)}

.nav{display:flex;align-items:center;gap:22px;margin-left:auto}
.nav-list{display:flex;align-items:center;gap:2px;margin:0;padding:0;list-style:none}
.nav-link{
  position:relative;display:inline-flex;align-items:baseline;gap:7px;
  padding:10px 12px;border:1px solid transparent;border-radius:2px;
  font-size:15px;font-weight:600;color:var(--paper);text-decoration:none;
  transition:color .16s ease,background .16s ease,border-color .16s ease;
}
.nav-link__idx{font-family:var(--font-mono);font-size:10px;letter-spacing:.1em;color:var(--muted)}
.nav-link:hover{color:var(--cyan);background:rgba(0,229,195,.07);border-color:rgba(0,229,195,.35);text-decoration:none}
.nav-link:hover .nav-link__idx{color:var(--cyan)}
.nav-link[aria-current="page"]{color:var(--ink-0);background:var(--cyan);border-color:var(--cyan);box-shadow:3px 3px 0 var(--ink-0)}
.nav-link[aria-current="page"] .nav-link__idx{color:var(--cyan-deep)}
.nav-cta{white-space:nowrap;font-size:14px;padding:11px 18px}

.nav-toggle{
  display:none;align-items:center;gap:10px;margin-left:auto;
  padding:10px 14px;background:var(--ink-2);color:var(--paper);
  border:2px solid var(--line-strong);border-radius:2px;font:inherit;cursor:pointer;
  transition:border-color .16s ease,background .16s ease;
}
.nav-toggle__bars{position:relative;display:block;width:20px;height:2px;background:var(--cyan)}
.nav-toggle__bars::before,.nav-toggle__bars::after{content:"";position:absolute;left:0;width:20px;height:2px;background:var(--cyan);transition:transform .2s ease,opacity .2s ease}
.nav-toggle__bars::before{top:-6px}
.nav-toggle__bars::after{top:6px}
.nav-toggle__label{font-size:11px;letter-spacing:.2em;color:var(--muted)}
.nav-toggle:hover{border-color:var(--cyan)}
.site-header[data-open] .nav-toggle{border-color:var(--cyan);background:rgba(0,229,195,.08)}
.site-header[data-open] .nav-toggle__bars{background:transparent}
.site-header[data-open] .nav-toggle__bars::before{transform:translateY(6px) rotate(45deg)}
.site-header[data-open] .nav-toggle__bars::after{transform:translateY(-6px) rotate(-45deg)}

.scroll-progress{
  position:absolute;left:0;bottom:0;z-index:3;width:100%;height:3px;
  transform:scaleX(0);transform-origin:0 50%;
  background:linear-gradient(90deg,var(--cyan) 0%,var(--violet) 48%,var(--orange) 100%);
  transition:transform .08s linear;
}

/* ---------- 13. 页脚 ---------- */
.site-footer{margin-top:clamp(56px,8vw,96px);background:var(--ink-0);color:var(--paper);border-top:3px solid var(--cyan)}
.footer-strip{background:linear-gradient(90deg,var(--cyan-deep) 0%,var(--ink-0) 46%,var(--orange-deep) 100%);border-bottom:1px solid var(--line)}
.footer-strip__inner{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px 22px;min-height:52px;padding-top:10px;padding-bottom:10px}
.footer-strip__label{font-size:11.5px;letter-spacing:.26em;text-transform:uppercase;color:var(--cyan)}
.footer-strip__meta{font-size:11.5px;letter-spacing:.14em;color:var(--muted)}

.footer-inner{padding-top:clamp(36px,5vw,56px);padding-bottom:clamp(28px,4vw,40px)}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.35fr;gap:clamp(28px,4vw,44px) clamp(20px,3vw,34px)}
.footer-brand{display:flex;flex-direction:column;align-items:flex-start;gap:10px}
.footer-brand__mark{
  display:grid;place-items:center;width:46px;height:46px;
  background:linear-gradient(135deg,var(--cyan),var(--violet));color:var(--ink-0);
  font-family:var(--font-head);font-weight:900;font-size:21px;line-height:1;
  border:2px solid var(--ink-0);box-shadow:4px 4px 0 rgba(0,229,195,.28);
}
.footer-brand__name{font-family:var(--font-head);font-weight:900;font-size:22px;letter-spacing:.08em;color:var(--paper)}
.footer-brand__domain{font-size:11.5px;letter-spacing:.16em;color:var(--muted)}
.footer-note{margin:6px 0 0;max-width:34ch;font-size:14.5px;line-height:1.75;color:var(--muted)}

.footer-col{display:grid;align-content:start;gap:2px}
.footer-title{margin:0 0 14px;font-family:var(--font-mono);font-size:11.5px;font-weight:600;letter-spacing:.24em;text-transform:uppercase;color:var(--cyan)}
.footer-list{display:grid;gap:10px;margin:0;padding:0;list-style:none}
.foot-link{display:inline-flex;align-items:center;gap:8px;padding:2px 0;border-bottom:1px solid transparent;font-size:15px;color:var(--paper);text-decoration:none;transition:color .16s ease,border-color .16s ease}
.foot-link::before{content:"—";font-family:var(--font-mono);color:var(--line-strong)}
.foot-link:hover,.foot-link:focus-visible{color:var(--cyan);border-bottom-color:var(--cyan);text-decoration:none}
.foot-link[aria-current="page"]{color:var(--cyan)}
.foot-link--flat{font-size:13.5px;color:var(--muted)}
.foot-link--flat::before{content:none}

.footer-contact{display:grid;gap:12px;margin:0}
.footer-contact__row{display:grid;grid-template-columns:56px 1fr;gap:10px;align-items:start}
.footer-contact__key{margin:0;padding-top:3px;font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;color:var(--gold)}
.footer-contact__val{margin:0;font-size:14.5px;line-height:1.6;color:var(--paper);word-break:break-word}

.footer-legal{border-top:1px solid var(--line);background:rgba(11,17,48,.55)}
.footer-legal__inner{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px 26px;padding-top:22px;padding-bottom:26px}
.footer-copy{margin:0;font-family:var(--font-mono);font-size:12.5px;letter-spacing:.06em;color:var(--muted)}
.footer-legal__links{display:flex;flex-wrap:wrap;gap:10px 20px;margin:0;padding:0;list-style:none}
.footer-icp{margin:0;font-size:12px;letter-spacing:.08em;color:var(--muted)}

/* ---------- 14. 响应式 ---------- */
@media (max-width:1120px){
  .nav{gap:12px}
  .nav-link{padding:9px 9px;font-size:14.5px}
  .nav-link__idx{display:none}
  .nav-cta{font-size:13px;padding:10px 14px}
}

@media (max-width:1024px){
  .footer-grid{grid-template-columns:1fr 1fr}
}

@media (max-width:900px){
  :root{--pad:18px}
  html{scroll-padding-top:130px}
  .header-top{display:none}
  .nav-toggle{display:inline-flex}
  .header-main__inner{padding-top:10px;padding-bottom:10px;gap:12px}
  .nav{
    position:absolute;left:0;right:0;top:100%;display:block;margin:0;
    padding:10px 0 18px;background:var(--ink-2);
    border-top:2px solid var(--ink-0);border-bottom:3px solid var(--cyan);
    box-shadow:0 26px 44px -22px #000;
    max-height:0;opacity:0;visibility:hidden;overflow:hidden;transform:translateY(-10px);
    transition:max-height .3s ease,opacity .2s ease,transform .24s ease,visibility .24s linear;
  }
  .site-header[data-open] .nav{max-height:78vh;opacity:1;visibility:visible;transform:none;overflow-y:auto}
  .nav-list{flex-direction:column;align-items:stretch;gap:0;padding:0 18px}
  .nav-link{display:flex;align-items:center;padding:14px 4px;font-size:16px;border-radius:0;border-bottom:1px solid var(--line);gap:10px}
  .nav-link__idx{display:inline}
  .nav-link[aria-current="page"]{box-shadow:none;border-color:transparent;background:rgba(0,229,195,.16);color:var(--cyan)}
  .nav-link[aria-current="page"] .nav-link__idx{color:var(--cyan)}
  .nav-cta{width:calc(100% - 36px);margin:16px 18px 0;justify-content:center;font-size:14px;padding:13px 18px}
  .brand__domain{display:none}
  .brand__mark{width:38px;height:38px;font-size:18px}
  .brand__name{font-size:18px}
  .grid--2,.grid--3,.grid--split{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
}

@media (max-width:640px){
  body{font-size:16px}
  :root{--pad:16px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-legal__inner{flex-direction:column;align-items:flex-start;gap:12px}
  .footer-contact__row{grid-template-columns:52px 1fr}
  .data-list__row{grid-template-columns:1fr;gap:4px}
  .media__cap{font-size:11px}
}

/* ---------- 15. 减少动效偏好 ---------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  [data-reveal]{opacity:1;transform:none;transition:none}
  .scroll-progress{transition:none}
}