/* =========================================================
   88体育主站 · V4矩阵  —  /assets/site.css
   reset / 设计令牌 / 头部 / 页脚 / 通用组件
   ========================================================= */

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

/* ---------- 设计令牌 ---------- */
:root{
  --ink-900:#04120E;
  --ink-800:#0A241C;
  --ink-700:#10352B;
  --line-teal:#1E4A3D;
  --cyan-400:#21E6C1;
  --cyan-600:#0FA98F;
  --orange-400:#FF7A2F;
  --text-100:#EAF7F3;
  --text-300:#9DBFB4;
  --white-000:#FFFFFF;
  --deep-teal:#0B3B33;

  --hair:1px solid var(--line-teal);
  --hair-strong:1px solid rgba(33,230,193,.34);
  --font-sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --shell-max:1440px;
  --rail:clamp(1.15rem,4vw,4rem);
  --header-h:72px;
  --radius:2px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ---------- 基础排版 ---------- */
body{
  min-height:100vh;
  background-color:var(--ink-900);
  background-image:radial-gradient(circle,rgba(33,230,193,.055) 1px,transparent 1px);
  background-size:26px 26px;
  color:var(--text-100);
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.85;
  letter-spacing:.01em;
  overflow-x:hidden;
}
h1,h2,h3,h4{line-height:1.18;font-weight:800;letter-spacing:-.03em;color:var(--text-100)}
h1{font-size:clamp(2.4rem,6.2vw,4.6rem)}
h2{font-size:clamp(1.7rem,3.6vw,2.6rem)}
h3{font-size:clamp(1.15rem,2vw,1.45rem);letter-spacing:-.015em}
p{color:inherit}
strong{font-weight:700;color:var(--white-000)}
::selection{background:var(--cyan-400);color:var(--ink-900)}

:focus-visible{outline:2px solid var(--cyan-400);outline-offset:3px;border-radius:var(--radius)}
main [id]{scroll-margin-top:calc(var(--header-h) + 22px)}

/* ---------- 容器与区块 ---------- */
.shell{width:min(var(--shell-max),100% - (var(--rail) * 2));margin-inline:auto}
.section{padding-block:clamp(3rem,7vw,6rem)}
.section--alt{background:var(--ink-800);border-top:var(--hair);border-bottom:var(--hair)}
.section__head{margin-bottom:clamp(1.6rem,3vw,2.6rem)}
.eyebrow{
  display:inline-flex;align-items:center;gap:.7rem;
  font-family:var(--font-mono);font-size:.72rem;letter-spacing:.24em;
  text-transform:uppercase;color:var(--cyan-400);margin-bottom:.9rem;
}
.eyebrow::before{content:"";width:34px;height:1px;background:var(--cyan-400)}
.section__title{margin-bottom:.7rem}
.lede{max-width:34em;color:var(--text-300);font-size:1.02rem}
.divider{height:1px;background:var(--line-teal);border:0;margin-block:clamp(1.6rem,3vw,2.6rem)}

/* ---------- 网格 ---------- */
.grid{display:grid;gap:clamp(1rem,2.2vw,1.75rem);grid-template-columns:repeat(12,minmax(0,1fr))}
.grid--auto{grid-template-columns:repeat(auto-fit,minmax(min(100%,260px),1fr))}
.span-3{grid-column:span 3}
.span-4{grid-column:span 4}
.span-5{grid-column:span 5}
.span-6{grid-column:span 6}
.span-7{grid-column:span 7}
.span-8{grid-column:span 8}
.span-12{grid-column:span 12}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;gap:.55rem;
  padding:.72rem 1.35rem;border:1px solid var(--cyan-400);
  background:var(--cyan-400);color:var(--ink-900);
  font-size:.9rem;font-weight:700;letter-spacing:.05em;border-radius:var(--radius);
  transition:background .25s var(--ease),color .25s var(--ease),border-color .25s var(--ease),transform .25s var(--ease);
}
.btn:hover{background:var(--white-000);border-color:var(--white-000);transform:translateY(-2px)}
.btn--ghost{background:transparent;border-color:var(--line-teal);color:var(--text-100)}
.btn--ghost:hover{background:rgba(33,230,193,.08);border-color:var(--cyan-400);color:var(--cyan-400)}
.btn--signal{background:var(--orange-400);border-color:var(--orange-400);color:#1A0C03}
.btn--signal:hover{background:#FFD3B6;border-color:#FFD3B6}

/* ---------- 标签 ---------- */
.tag{
  display:inline-flex;align-items:center;gap:.4rem;
  padding:.2rem .6rem;border:1px solid var(--line-teal);
  font-family:var(--font-mono);font-size:.68rem;letter-spacing:.14em;
  text-transform:uppercase;color:var(--text-300);border-radius:var(--radius);
}
.tag--cyan{border-color:rgba(33,230,193,.5);color:var(--cyan-400)}
.tag--orange{border-color:rgba(255,122,47,.55);color:var(--orange-400)}

/* ---------- 资料卡 / 面板 ---------- */
.panel{
  background:var(--ink-800);border:var(--hair);
  padding:clamp(1.2rem,2.4vw,1.9rem);
  box-shadow:0 18px 40px -34px rgba(0,0,0,.9);
}
.panel--deep{background:var(--ink-700)}
.card{
  position:relative;display:flex;flex-direction:column;gap:.7rem;
  background:var(--ink-800);border:var(--hair);
  padding:clamp(1.2rem,2.4vw,1.8rem);
  transition:transform .3s var(--ease),border-color .3s var(--ease),background .3s var(--ease);
}
.card:hover{transform:translateY(-4px);border-color:var(--cyan-600);background:var(--ink-700)}
.card__index{font-family:var(--font-mono);font-size:.7rem;letter-spacing:.2em;color:var(--cyan-600)}
.card__title{font-size:1.16rem;font-weight:700;letter-spacing:-.01em}
.card__text{color:var(--text-300);font-size:.95rem;line-height:1.8}
.card__meta{display:flex;flex-wrap:wrap;gap:.5rem;margin-top:auto;padding-top:.4rem;font-family:var(--font-mono);font-size:.68rem;letter-spacing:.12em;color:var(--text-300)}

/* ---------- 数据点 ---------- */
.stat{border-left:1px solid var(--line-teal);padding-left:1rem}
.stat__value{font-family:var(--font-mono);font-size:clamp(1.6rem,3vw,2.3rem);font-weight:700;color:var(--white-000);letter-spacing:-.02em;line-height:1.2}
.stat__label{font-size:.78rem;font-family:var(--font-mono);letter-spacing:.16em;color:var(--text-300);text-transform:uppercase}

/* ---------- 链接与面包屑 ---------- */
.link-arrow{display:inline-flex;align-items:center;gap:.45rem;color:var(--cyan-400);font-weight:600;font-size:.95rem;transition:gap .25s var(--ease),color .25s var(--ease)}
.link-arrow::after{content:"\2192";transition:transform .25s var(--ease)}
.link-arrow:hover{color:var(--white-000)}
.link-arrow:hover::after{transform:translateX(4px)}

.crumbs{font-family:var(--font-mono);font-size:.72rem;letter-spacing:.12em;color:var(--text-300);margin-bottom:1.4rem}
.crumbs__list{display:flex;flex-wrap:wrap;align-items:center;gap:.6rem}
.crumbs__item{display:inline-flex;align-items:center;gap:.6rem}
.crumbs__item+.crumbs__item::before{content:"/";color:var(--cyan-600);opacity:.8}
.crumbs__link:hover{color:var(--cyan-400)}
.crumbs__item[aria-current="page"]{color:var(--text-100)}

/* ---------- 正文容器 ---------- */
.prose{max-width:68ch;color:var(--text-300);font-size:1rem;line-height:1.9}
.prose>*+*{margin-top:1.15em}
.prose h2,.prose h3{color:var(--text-100);margin-top:1.8em}
.prose h2{font-size:clamp(1.4rem,2.6vw,1.9rem)}
.prose h3{font-size:1.15rem}
.prose a{color:var(--cyan-400);border-bottom:1px solid rgba(33,230,193,.4)}
.prose a:hover{color:var(--white-000)}
.prose ul,.prose ol{padding-left:1.2rem;list-style:disc}
.prose ol{list-style:decimal}
.prose li+li{margin-top:.45em}
.prose strong{color:var(--text-100)}
.prose blockquote{border-left:2px solid var(--cyan-600);padding-left:1.1rem;color:var(--text-100)}
.prose code{font-family:var(--font-mono);font-size:.88em;color:var(--cyan-400);background:rgba(33,230,193,.08);padding:.1em .35em}
.prose table{font-size:.92rem;margin-top:1.4em}
.prose th,.prose td{border-bottom:var(--hair);padding:.7rem .6rem;text-align:left}
.prose th{font-family:var(--font-mono);font-size:.74rem;letter-spacing:.12em;text-transform:uppercase;color:var(--cyan-400)}

/* ---------- 图片容器（页面阶段放占位） ---------- */
.media{position:relative;border:var(--hair);background:var(--ink-700);overflow:hidden}
.media__frame{position:relative;width:100%;aspect-ratio:16/9;display:grid;place-items:center;
  background-color:var(--ink-700);
  background-image:linear-gradient(135deg,rgba(33,230,193,.10),transparent 55%),linear-gradient(315deg,rgba(255,122,47,.07),transparent 60%)}
.media__frame img,.media__frame svg{width:100%;height:100%;object-fit:cover}
.media--wide .media__frame{aspect-ratio:21/9}
.media--square .media__frame{aspect-ratio:1/1}
.media--portrait .media__frame{aspect-ratio:3/4}
.media__caption{padding:.75rem .9rem;border-top:var(--hair);font-family:var(--font-mono);font-size:.7rem;letter-spacing:.12em;color:var(--text-300)}

/* ---------- 折叠问答组 ---------- */
.accordion{border-top:var(--hair)}
.accordion__item{border-bottom:var(--hair)}
.accordion__trigger{
  display:flex;align-items:center;gap:1rem;width:100%;
  padding:1.15rem .3rem;text-align:left;
  font-size:1.03rem;font-weight:600;color:var(--text-100);
  transition:color .25s var(--ease),padding-left .25s var(--ease);
}
.accordion__trigger:hover{color:var(--cyan-400);padding-left:.8rem}
.accordion__trigger[aria-expanded="true"]{color:var(--cyan-400)}
.accordion__index{font-family:var(--font-mono);font-size:.7rem;letter-spacing:.16em;color:var(--cyan-600)}
.accordion__trigger[aria-expanded="true"] .accordion__index{color:var(--orange-400)}
.accordion__icon{position:relative;width:14px;height:14px;margin-left:auto;flex:none}
.accordion__icon::before,.accordion__icon::after{content:"";position:absolute;background:currentColor;transition:transform .28s var(--ease)}
.accordion__icon::before{left:0;right:0;top:50%;height:1px;transform:translateY(-50%)}
.accordion__icon::after{top:0;bottom:0;left:50%;width:1px;transform:translateX(-50%)}
.accordion__trigger[aria-expanded="true"] .accordion__icon::after{transform:translateX(-50%) scaleY(0)}
.accordion__panel{padding:0 .3rem 1.3rem;color:var(--text-300);font-size:.96rem;line-height:1.85;max-width:66ch;animation:panel-in .28s var(--ease)}
.accordion__panel[hidden]{display:none}
@keyframes panel-in{from{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:none}}

/* ---------- 显现 ---------- */
html.js [data-reveal]{opacity:0;transform:translateY(16px);transition:opacity .6s var(--ease),transform .6s var(--ease);transition-delay:var(--reveal-delay,0ms)}
html.js [data-reveal].is-visible{opacity:1;transform:none}

/* ---------- 跳转链接 ---------- */
.skip-link{
  position:fixed;top:-140px;left:var(--rail);z-index:200;
  padding:.65rem 1.15rem;background:var(--cyan-400);color:var(--ink-900);
  font-size:.85rem;font-weight:700;letter-spacing:.08em;border-radius:var(--radius);
  transition:top .2s var(--ease);
}
.skip-link:focus{top:12px}

/* =========================================================
   头部
   ========================================================= */
.site-header{
  position:sticky;top:0;z-index:100;
  background:var(--ink-900);
  border-bottom:var(--hair);
}
.header-rail{
  width:min(var(--shell-max),100% - (var(--rail) * 2));
  margin-inline:auto;
  min-height:var(--header-h);
  display:flex;align-items:center;gap:clamp(.8rem,2.4vw,2rem);
  padding-block:.55rem;
}
.scroll-progress{position:absolute;left:0;right:0;bottom:-1px;height:2px;overflow:hidden}
.scroll-progress__bar{display:block;width:0;height:100%;background:linear-gradient(90deg,var(--cyan-600),var(--cyan-400))}

.brand{display:flex;align-items:center;gap:1rem;min-width:0}
.brand__link{display:flex;align-items:center;gap:.75rem}
.brand__mark{
  display:grid;place-items:center;flex:none;
  width:42px;height:42px;
  border:1px solid var(--cyan-400);color:var(--cyan-400);
  font-family:var(--font-mono);font-size:.95rem;font-weight:700;letter-spacing:-.02em;
  box-shadow:inset 0 0 0 1px rgba(33,230,193,.14);
  transition:background .25s var(--ease),color .25s var(--ease);
}
.brand__link:hover .brand__mark{background:var(--cyan-400);color:var(--ink-900)}
.brand__text{display:flex;flex-direction:column;line-height:1.25;min-width:0}
.brand__name{font-size:1.04rem;font-weight:800;letter-spacing:.02em;color:var(--text-100);white-space:nowrap}
.brand__tag{font-size:.68rem;letter-spacing:.16em;color:var(--text-300);white-space:nowrap}
.brand__index{
  font-family:var(--font-mono);font-size:.62rem;letter-spacing:.22em;color:var(--cyan-600);
  padding-left:.9rem;border-left:var(--hair);white-space:nowrap;
}

.site-nav{margin-left:auto}
.site-nav__list{counter-reset:nav;display:flex;align-items:center;gap:clamp(.4rem,1.5vw,1.45rem)}
.site-nav__item{counter-increment:nav}
.site-nav__link{
  position:relative;display:inline-flex;align-items:baseline;gap:.42rem;
  padding:.55rem .15rem;font-size:.94rem;letter-spacing:.04em;
  color:var(--text-300);transition:color .25s var(--ease);
}
.site-nav__link::before{
  content:"0" counter(nav);
  font-family:var(--font-mono);font-size:.6rem;letter-spacing:.06em;
  color:var(--cyan-600);transition:color .25s var(--ease);
}
.site-nav__link::after{
  content:"";position:absolute;left:0;right:0;bottom:.24rem;height:1px;
  background:var(--cyan-400);transform:scaleX(0);transform-origin:left;
  transition:transform .3s var(--ease);
}
.site-nav__link:hover{color:var(--text-100)}
.site-nav__link:hover::after{transform:scaleX(1)}
.site-nav__link[aria-current="page"]{color:var(--white-000)}
.site-nav__link[aria-current="page"]::before{color:var(--orange-400)}
.site-nav__link[aria-current="page"]::after{transform:scaleX(1);background:var(--orange-400)}

.header-cta{
  flex:none;padding:.55rem 1.05rem;
  border:1px solid var(--cyan-600);color:var(--cyan-400);
  font-size:.85rem;font-weight:700;letter-spacing:.08em;border-radius:var(--radius);
  transition:background .25s var(--ease),color .25s var(--ease),border-color .25s var(--ease);
}
.header-cta:hover{background:var(--cyan-400);border-color:var(--cyan-400);color:var(--ink-900)}

.nav-toggle{
  display:none;align-items:center;gap:.6rem;
  margin-left:auto;padding:.55rem .8rem;
  border:1px solid var(--line-teal);color:var(--text-100);
  font-family:var(--font-mono);font-size:.68rem;letter-spacing:.18em;text-transform:uppercase;
  border-radius:var(--radius);
}
.nav-toggle__bars{display:grid;gap:5px;width:18px}
.nav-toggle__bars span{display:block;height:1px;background:var(--cyan-400);transition:transform .25s var(--ease)}
.nav-toggle[aria-expanded="true"]{border-color:var(--cyan-400)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:first-child{transform:translateY(3px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:last-child{transform:translateY(-3px) rotate(-45deg)}

.site-header[data-open]{border-bottom-color:transparent}

/* =========================================================
   页脚
   ========================================================= */
.site-footer{
  margin-top:clamp(3rem,7vw,6rem);
  background:var(--deep-teal);
  border-top:var(--hair-strong);
}
.footer-rail{width:min(var(--shell-max),100% - (var(--rail) * 2));margin-inline:auto;padding-block:clamp(2.2rem,5vw,3.6rem)}
.footer-grid{
  display:grid;gap:clamp(1.8rem,4vw,4rem);
  grid-template-columns:minmax(0,1.5fr) minmax(0,1fr) minmax(0,1.35fr);
}
.footer-brand{display:flex;flex-direction:column;gap:.55rem}
.footer-brand__mark{
  display:grid;place-items:center;width:46px;height:46px;margin-bottom:.4rem;
  border:1px solid var(--cyan-400);color:var(--cyan-400);
  font-family:var(--font-mono);font-size:1rem;font-weight:700;
  box-shadow:inset 0 0 0 1px rgba(33,230,193,.14);
}
.footer-brand__name{font-size:1.1rem;font-weight:800;letter-spacing:.03em;color:var(--white-000)}
.footer-brand__meta{font-family:var(--font-mono);font-size:.7rem;letter-spacing:.16em;color:var(--cyan-400)}
.footer-brand__contact{font-family:var(--font-mono);font-size:.82rem;color:var(--text-100);word-break:break-word}
.footer-brand__address{font-size:.85rem;color:var(--text-300);max-width:26em}

.footer-nav__title{
  font-family:var(--font-mono);font-size:.68rem;letter-spacing:.24em;text-transform:uppercase;
  color:var(--text-300);padding-bottom:.7rem;margin-bottom:.9rem;border-bottom:var(--hair);
}
.footer-nav__list,.footer-legal__links{display:grid;gap:.55rem}
.footer-nav__link,.footer-legal__link{
  display:inline-block;font-size:.92rem;color:var(--text-100);
  transition:color .25s var(--ease),transform .25s var(--ease);
}
.footer-nav__link:hover,.footer-legal__link:hover{color:var(--cyan-400);transform:translateX(4px)}
.footer-legal__link{color:var(--text-300)}
.footer-legal__note{margin-top:1.1rem;font-size:.8rem;line-height:1.75;color:var(--text-300);max-width:30em}

.footer-base{
  margin-top:clamp(1.8rem,4vw,3rem);padding-top:1.2rem;
  border-top:var(--hair);
  display:flex;flex-wrap:wrap;align-items:center;gap:.6rem 1.4rem;
  font-family:var(--font-mono);font-size:.72rem;letter-spacing:.12em;color:var(--text-300);
}
.footer-base__copy{margin-right:auto}
.footer-base__icp{color:var(--text-100)}
.footer-base__tag{color:var(--cyan-600)}

/* =========================================================
   响应式
   ========================================================= */
@media (max-width:1180px){
  .brand__index{display:none}
}
@media (max-width:1024px){
  .span-3,.span-4,.span-5{grid-column:span 6}
  .span-7,.span-8{grid-column:span 12}
  .footer-grid{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}
  .footer-brand{grid-column:1 / -1}
}
@media (max-width:900px){
  :root{--header-h:64px}
  .header-rail{gap:.6rem}
  .nav-toggle{display:inline-flex}
  .header-cta{display:none}
  .site-nav{
    position:fixed;left:0;right:0;top:var(--header-h);margin-left:0;display:block;
    background:var(--ink-800);
    border-top:var(--hair);border-bottom:var(--hair);
    padding:1rem var(--rail) 1.8rem;
    max-height:calc(100dvh - var(--header-h));
    overflow-y:auto;
    opacity:0;visibility:hidden;pointer-events:none;transform:translateY(-8px);
    transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s;
  }
  .site-nav[data-open]{opacity:1;visibility:visible;pointer-events:auto;transform:none}
  .site-nav__list{flex-direction:column;align-items:stretch;gap:0}
  .site-nav__item{border-bottom:var(--hair)}
  .site-nav__item:last-child{border-bottom:0}
  .site-nav__link{display:flex;align-items:baseline;gap:.9rem;padding:1.05rem 0;font-size:1.32rem;font-weight:600;letter-spacing:-.01em;color:var(--text-100)}
  .site-nav__link::before{font-size:.7rem;letter-spacing:.14em;width:1.9rem;flex:none}
  .site-nav__link::after{bottom:.55rem}
}
@media (max-width:640px){
  :root{--rail:1.1rem}
  body{font-size:16px}
  .grid{grid-template-columns:repeat(6,minmax(0,1fr));gap:1rem}
  .span-3,.span-4,.span-5,.span-6,.span-7,.span-8,.span-12{grid-column:span 6}
  .footer-grid{grid-template-columns:minmax(0,1fr)}
  .brand__tag{display:none}
  .footer-base__copy{width:100%}
}

/* =========================================================
   动效降级
   ========================================================= */
@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;
  }
  html.js [data-reveal]{opacity:1;transform:none}
  .card:hover,.btn:hover,.footer-nav__link:hover,.footer-legal__link:hover{transform:none}
}