/* ==========================================================================
   球会体育 · 共享样式 /assets/site.css
   技术蓝图网格 + 左侧轨道导航 + 高原竞技数据氛围
   ========================================================================== */

/* ---------- 1. 变量 ---------- */
:root{
  --ink:#060A18;
  --panel:#0E1834;
  --panel-2:#0F2B3A;
  --indigo:#2E2456;
  --wine:#6E1F3B;
  --lime:#C6F24E;
  --pulse:#FF5A2B;
  --ice:#6FE3D0;
  --text:#E9EEF7;
  --muted:#8C99B8;
  --line:rgba(140,153,184,.22);
  --line-strong:rgba(140,153,184,.46);
  --rail-w:116px;
  --bar-h:66px;
  --wrap-w:1280px;
  --cut-shape:polygon(0 0,calc(100% - 16px) 0,100% 16px,100% 100%,16px 100%,0 calc(100% - 16px));
  --cut-shape-sm:polygon(0 0,calc(100% - 10px) 0,100% 10px,100% 100%,10px 100%,0 calc(100% - 10px));
  --ease:cubic-bezier(.2,.75,.25,1);
  --font-sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}

/* ---------- 2. reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  min-height:100vh;
  overflow-x:hidden;
  color:var(--text);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  background-color:var(--ink);
  background-image:
    linear-gradient(to right,rgba(140,153,184,.062) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(140,153,184,.062) 1px,transparent 1px),
    linear-gradient(to right,rgba(140,153,184,.026) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(140,153,184,.026) 1px,transparent 1px);
  background-size:120px 120px,120px 120px,30px 30px,30px 30px;
}
h1,h2,h3,h4{margin:0;line-height:1.25;font-weight:900;letter-spacing:-.01em}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
button{font:inherit;color:inherit}
a{color:var(--ice)}
main{display:block}
#main-content{outline:none}
::selection{background:var(--lime);color:var(--ink)}
:focus-visible{outline:2px solid var(--lime);outline-offset:2px}

@media (min-width:1024px){ body{padding-left:var(--rail-w)} }
@media (max-width:1023px){ body{padding-top:var(--bar-h)} }
body[data-nav-open]{overflow:hidden}

/* ---------- 3. 跳至主内容 ---------- */
.skip-link{
  position:fixed;top:10px;left:10px;z-index:120;
  padding:10px 16px;background:var(--lime);color:var(--ink);
  font-size:14px;font-weight:700;text-decoration:none;
  clip-path:var(--cut-shape-sm);
  transform:translateY(-200%);
  transition:transform .16s var(--ease);
}
.skip-link:focus{transform:none}

/* ---------- 4. 侧轨页头 ---------- */
.rail{
  position:fixed;top:0;left:0;bottom:0;width:var(--rail-w);z-index:50;
  display:flex;flex-direction:column;gap:14px;
  padding:18px 12px 20px;
  background:linear-gradient(180deg,var(--panel-2) 0%,var(--ink) 58%,var(--ink) 100%);
  border-right:1px solid var(--line);
}
.rail::after{
  content:"";position:absolute;top:0;right:-1px;width:1px;height:140px;
  background:linear-gradient(180deg,var(--lime),transparent);
}
.rail__top{display:flex;flex-direction:column;align-items:flex-start;gap:8px}

.brand{display:inline-flex;align-items:center;gap:8px;text-decoration:none;color:var(--text)}
.brand__mark{
  display:grid;place-items:center;width:34px;height:34px;flex:0 0 auto;
  background:var(--lime);color:var(--ink);
  font-family:var(--font-mono);font-size:13px;font-weight:700;letter-spacing:.02em;
  clip-path:var(--cut-shape-sm);
}
.brand__text{font-size:15px;font-weight:900;letter-spacing:.04em;white-space:nowrap}
.brand:hover .brand__mark{background:var(--ice)}
.brand--foot .brand__mark{width:40px;height:40px;font-size:15px}
.brand--foot .brand__text{font-size:20px}

.rail__badge{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;
  color:var(--lime);background:rgba(198,242,78,.1);
  border:1px solid rgba(198,242,78,.45);
  padding:2px 7px;clip-path:polygon(0 0,calc(100% - 7px) 0,100% 7px,100% 100%,7px 100%,0 calc(100% - 7px));
}

.rail__toggle{
  display:none;align-items:center;gap:9px;
  padding:8px 11px;background:transparent;border:1px solid var(--line-strong);
  font-size:13px;font-weight:700;cursor:pointer;
  clip-path:var(--cut-shape-sm);
}
.rail__bars{position:relative;display:block;width:16px;height:12px}
.rail__bars::before,.rail__bars::after{
  content:"";position:absolute;left:0;width:16px;height:2px;background:var(--lime);
  transition:transform .18s var(--ease);
}
.rail__bars::before{top:0}
.rail__bars::after{bottom:0}
.rail[data-open] .rail__bars::before{transform:translateY(5px) rotate(45deg)}
.rail[data-open] .rail__bars::after{transform:translateY(-5px) rotate(-45deg)}
.rail__toggle:hover{border-color:var(--lime);color:var(--lime)}

.rail__nav{
  position:relative;display:flex;flex-direction:column;flex:1 1 auto;min-height:0;
  padding-left:14px;
}
.rail__nav::before{
  content:"";position:absolute;left:5px;top:4px;bottom:4px;width:1px;
  background:linear-gradient(180deg,transparent,var(--line) 12%,var(--line) 88%,transparent);
}
.rail__marker{
  position:absolute;left:4px;top:0;width:3px;height:0;opacity:0;
  background:linear-gradient(180deg,var(--lime),var(--ice));
  box-shadow:0 0 10px rgba(198,242,78,.65);
  transition:transform .28s var(--ease),height .28s var(--ease),opacity .2s linear;
}
.nav-track{display:flex;flex-direction:column;gap:2px;margin:0 0 auto;padding:0}
.nav-track__item{position:relative}
.nav-link{
  position:relative;display:block;padding:8px 6px;text-decoration:none;
  color:var(--muted);border-left:1px solid transparent;
  transition:color .16s var(--ease),background-color .16s var(--ease);
}
.nav-link__idx{display:block;font-family:var(--font-mono);font-size:10px;letter-spacing:.16em;color:var(--line-strong)}
.nav-link__label{display:block;font-size:14px;font-weight:700;line-height:1.45;letter-spacing:.02em}
.nav-link:hover{color:var(--text);background:rgba(111,227,208,.07)}
.nav-link:hover .nav-link__idx{color:var(--ice)}
.nav-link[aria-current="page"]{color:var(--lime);background:linear-gradient(90deg,rgba(198,242,78,.14),transparent 88%)}
.nav-link[aria-current="page"] .nav-link__idx{color:var(--pulse)}
.nav-link[aria-current="page"]::after{
  content:"";position:absolute;left:-10px;top:50%;width:7px;height:7px;margin-top:-4px;
  background:var(--lime);box-shadow:0 0 12px rgba(198,242,78,.9);
}

.rail__actions{display:flex;flex-direction:column;gap:8px;margin-top:16px;padding-top:14px;border-top:1px dashed var(--line)}
.rail__tagline{
  margin-top:12px;font-family:var(--font-mono);font-size:10px;line-height:1.7;
  letter-spacing:.04em;color:var(--line-strong);
}
.rail__scrim{
  position:fixed;inset:0;z-index:40;background:rgba(6,10,24,.66);
  opacity:0;pointer-events:none;transition:opacity .2s linear;
}
.rail__scrim[data-open]{opacity:1;pointer-events:auto}
.rail__progress{
  position:fixed;top:0;left:var(--rail-w);right:0;height:2px;z-index:60;
  transform:scaleX(0);transform-origin:0 50%;
  background:linear-gradient(90deg,var(--lime),var(--pulse));
}

/* ---------- 5. 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:9px 14px;text-decoration:none;text-align:center;
  font-size:14px;font-weight:700;letter-spacing:.02em;line-height:1.3;
  color:var(--text);background:rgba(233,238,247,.04);border:1px solid var(--line-strong);
  clip-path:var(--cut-shape-sm);
  transition:background-color .16s var(--ease),color .16s var(--ease),border-color .16s var(--ease),transform .16s var(--ease);
}
.btn:hover{transform:translateY(-1px)}
.btn--pulse{background:var(--lime);border-color:var(--lime);color:var(--ink)}
.btn--pulse:hover{background:#d9ff6f;border-color:#d9ff6f}
.btn--ghost{background:transparent;border-color:rgba(198,242,78,.42);color:var(--lime)}
.btn--ghost:hover{background:rgba(198,242,78,.13)}
.btn--block{width:100%}
.cta-row{display:flex;flex-wrap:wrap;gap:10px}

/* ---------- 6. 版式容器 ---------- */
.wrap{width:100%;max-width:var(--wrap-w);margin-inline:auto;padding-inline:clamp(16px,4vw,48px)}
.section{position:relative;padding-block:clamp(40px,6vw,84px)}
.section-head{
  display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:18px;
  padding-bottom:16px;margin-bottom:26px;border-bottom:1px solid var(--line);
}
.section-head__title{margin-top:8px;font-size:clamp(24px,3vw,32px)}
.section-head__note{margin:0;font-size:14px;color:var(--muted);max-width:46ch}
.eyebrow{
  display:flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.22em;
  text-transform:uppercase;color:var(--ice);
}
.eyebrow::before{content:"";width:26px;height:1px;background:var(--ice);flex:0 0 auto}
.rule{height:1px;border:0;margin:0;background:linear-gradient(90deg,var(--line-strong),transparent)}
.note{font-size:13px;line-height:1.7;color:var(--muted)}
.note--mono{font-family:var(--font-mono);font-size:12px;letter-spacing:.02em;color:var(--line-strong)}
.prose{max-width:38em;color:var(--text)}
.prose p{margin-bottom:1.1em}
.prose h2{font-size:clamp(22px,2.6vw,28px);margin:1.6em 0 .6em}
.prose h3{font-size:20px;margin:1.4em 0 .5em}
.prose ul{list-style:none;margin:0 0 1.2em}
.prose li{padding-left:18px;position:relative;margin-bottom:.5em}
.prose li::before{content:"";position:absolute;left:0;top:.75em;width:8px;height:1px;background:var(--pulse)}
.prose a{color:var(--ice)}

/* ---------- 7. 网格 ---------- */
.grid{display:grid;gap:clamp(14px,1.8vw,22px);grid-template-columns:repeat(12,minmax(0,1fr))}
.grid--tight{gap:10px}
.col-3,.col-4,.col-6,.col-8,.col-12{grid-column:span 12}
@media (min-width:640px){
  .col-3{grid-column:span 6}
  .col-4{grid-column:span 6}
}
@media (min-width:1024px){
  .col-3{grid-column:span 3}
  .col-4{grid-column:span 4}
  .col-6{grid-column:span 6}
  .col-8{grid-column:span 8}
}

/* ---------- 8. 面板 ---------- */
.panel{
  position:relative;background:var(--panel);border:1px solid var(--line);
  padding:clamp(16px,2vw,24px);clip-path:var(--cut-shape);
}
.panel--teal{background:var(--panel-2)}
.panel--indigo{background:var(--indigo);border-color:rgba(111,227,208,.26)}
.panel--wine{background:var(--wine);border-color:rgba(255,90,43,.32)}

/* ---------- 9. 数据与索引 ---------- */
.data-figure{display:flex;flex-direction:column;gap:6px}
.data-figure__value{
  font-family:var(--font-mono);font-weight:700;letter-spacing:-.02em;
  font-size:clamp(40px,7vw,104px);line-height:.92;color:var(--lime);
}
.data-figure__label{font-size:13px;color:var(--muted)}
.data-figure--ice .data-figure__value{color:var(--ice)}
.data-figure--pulse .data-figure__value{color:var(--pulse)}

.index-list{border-top:1px solid var(--line)}
.index-list__item{
  display:grid;grid-template-columns:54px 1fr;gap:14px;align-items:baseline;
  padding:14px 0;border-bottom:1px solid var(--line);
}
.index-num{font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;color:var(--pulse)}

.badge{
  display:inline-flex;align-items:center;gap:6px;padding:3px 8px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;
  color:var(--ice);background:rgba(111,227,208,.08);border:1px solid rgba(111,227,208,.35);
}
.badge--lime{color:var(--lime);background:rgba(198,242,78,.1);border-color:rgba(198,242,78,.4)}
.badge--pulse{color:var(--pulse);background:rgba(255,90,43,.12);border-color:rgba(255,90,43,.42)}
.tag{
  display:inline-block;padding:2px 7px;font-family:var(--font-mono);font-size:11px;
  color:var(--muted);border:1px solid var(--line-strong);
}

/* ---------- 10. 标签页 ---------- */
.tabs__list{display:flex;flex-wrap:wrap;gap:6px;border-bottom:1px solid var(--line);margin-bottom:18px}
.tab{
  position:relative;appearance:none;background:transparent;border:1px solid transparent;
  padding:9px 14px;font-size:14px;font-weight:700;color:var(--muted);cursor:pointer;
  transition:color .16s var(--ease),background-color .16s var(--ease);
}
.tab:hover{color:var(--text);background:rgba(111,227,208,.07)}
.tab[aria-selected="true"]{color:var(--lime);background:rgba(198,242,78,.09);border-color:var(--line)}
.tab[aria-selected="true"]::after{content:"";position:absolute;left:0;right:0;bottom:-1px;height:2px;background:var(--lime)}
.tabs__panel{padding-top:4px}
.tabs__panel[hidden]{display:none}

/* ---------- 11. 图片容器 ---------- */
.media{margin:0}
.media__frame{
  position:relative;overflow:hidden;aspect-ratio:4/3;
  background:linear-gradient(135deg,var(--panel) 0%,var(--panel-2) 55%,var(--indigo) 100%);
  border:1px solid var(--line);clip-path:var(--cut-shape);
}
.media__frame::before{
  content:"";position:absolute;inset:auto 0 0 0;height:64%;
  background:linear-gradient(90deg,rgba(198,242,78,.22),rgba(255,90,43,.14));
  clip-path:polygon(0 100%,18% 46%,36% 74%,55% 22%,74% 62%,100% 34%,100% 100%);
}
.media__frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(to right,rgba(140,153,184,.14) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(140,153,184,.14) 1px,transparent 1px);
  background-size:40px 40px;opacity:.55;
}
.media__img{position:relative;z-index:1;width:100%;height:100%;object-fit:cover}
.media__caption{margin-top:8px;font-family:var(--font-mono);font-size:12px;color:var(--muted)}
.media--wide .media__frame{aspect-ratio:16/7}
.media--square .media__frame{aspect-ratio:1/1}
.media--tall .media__frame{aspect-ratio:3/4}

/* ---------- 12. 面包屑 ---------- */
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  padding:16px 0;font-family:var(--font-mono);font-size:12px;color:var(--muted);
}
.breadcrumb > li{display:flex;align-items:center;gap:8px}
.breadcrumb > li + li::before{content:"/";color:var(--line-strong)}
.crumb{color:var(--muted);text-decoration:none}
.crumb:hover{color:var(--lime)}
.crumb[aria-current="page"]{color:var(--text)}

/* ---------- 13. 显现 ---------- */
.has-js [data-reveal]{opacity:0;transform:translateY(14px)}
.has-js [data-reveal].is-visible{
  opacity:1;transform:none;
  transition:opacity .42s var(--ease),transform .42s var(--ease);
}

/* ---------- 14. 页脚 ---------- */
.foot{
  position:relative;overflow:hidden;
  background:var(--panel-2);border-top:1px solid var(--line);
}
.foot::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(to right,rgba(140,153,184,.055) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(140,153,184,.055) 1px,transparent 1px);
  background-size:60px 60px;
}
.foot::after{
  content:"";position:absolute;top:0;left:0;width:200px;height:2px;
  background:linear-gradient(90deg,var(--lime),var(--pulse),transparent);
}
.foot__grid{
  position:relative;display:grid;gap:34px 28px;
  grid-template-columns:1.5fr 1fr 1fr 1fr 1.2fr;
  padding-block:56px 40px;
}
.foot__brand{display:flex;flex-direction:column;gap:12px;align-items:flex-start}
.foot__tagline{font-size:13px;color:var(--ice);letter-spacing:.04em}
.foot__service{font-size:13px;line-height:1.8;color:var(--muted);max-width:30ch}
.foot__col-title{
  margin-bottom:12px;font-family:var(--font-mono);font-size:12px;
  letter-spacing:.18em;text-transform:uppercase;color:var(--ice);
}
.foot__links{display:flex;flex-direction:column;gap:2px}
.foot__link{
  display:inline-flex;align-items:center;gap:8px;padding:6px 0;
  font-size:14px;color:var(--muted);text-decoration:none;
  transition:color .16s var(--ease);
}
.foot__link::before{content:"";width:10px;height:1px;background:var(--line-strong);transition:width .16s var(--ease),background-color .16s var(--ease)}
.foot__link:hover{color:var(--lime)}
.foot__link:hover::before{width:20px;background:var(--lime)}
.foot__contact{display:flex;flex-direction:column}
.contact-item{
  display:grid;grid-template-columns:58px 1fr;gap:10px;align-items:baseline;
  padding:8px 0;font-size:13px;border-bottom:1px dashed rgba(140,153,184,.16);
}
.contact-item__k{font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;color:var(--line-strong)}
.contact-item__v{color:var(--text)}
.foot__base{
  position:relative;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;
  padding-block:18px 28px;border-top:1px solid var(--line);
}
.foot__meta{margin:0;font-family:var(--font-mono);font-size:12px;letter-spacing:.02em;color:var(--muted)}
.foot__icp{color:var(--ice)}
.to-top{
  display:inline-flex;align-items:center;gap:8px;padding:8px 12px;cursor:pointer;
  background:transparent;border:1px solid var(--line-strong);color:var(--muted);
  font-size:13px;font-weight:700;clip-path:var(--cut-shape-sm);
  transition:color .16s var(--ease),border-color .16s var(--ease);
}
.to-top:hover{color:var(--lime);border-color:rgba(198,242,78,.5)}

/* ---------- 15. 响应式：平板与手机 ---------- */
@media (max-width:1279px){
  .foot__grid{grid-template-columns:1.4fr 1fr 1fr 1.4fr}
  .foot__brand{grid-column:span 4}
  .foot__col:last-child{grid-column:span 4}
}
@media (max-width:1023px){
  .rail{
    inset:0 0 auto 0;width:100%;height:var(--bar-h);
    flex-direction:row;align-items:center;gap:12px;padding:0 16px;
    border-right:0;border-bottom:1px solid var(--line);
    background:rgba(6,10,24,.94);
    backdrop-filter:blur(10px);
  }
  .rail::after{top:auto;right:auto;bottom:-1px;left:0;width:110px;height:1px;background:linear-gradient(90deg,var(--lime),transparent)}
  .rail__top{flex-direction:row;align-items:center;gap:10px}
  .rail__toggle{display:inline-flex;margin-left:auto}
  .rail__nav{
    position:fixed;top:var(--bar-h);left:0;bottom:0;z-index:45;
    width:min(86vw,340px);padding:20px 18px 26px;
    background:linear-gradient(180deg,var(--panel-2),var(--ink) 70%);
    border-right:1px solid var(--line);
    transform:translateX(-103%);
    transition:transform .24s var(--ease);
  }
  .rail__nav::before{display:none}
  .rail__marker{display:none}
  .rail__nav[data-open]{transform:translateX(0)}
  .nav-track{margin-bottom:auto;border-top:1px solid var(--line)}
  .nav-link{
    display:flex;align-items:baseline;gap:12px;padding:13px 12px;
    border-bottom:1px solid var(--line);border-left:0;
  }
  .nav-link__idx{font-size:11px}
  .nav-link__label{font-size:17px}
  .nav-link:hover{background:rgba(111,227,208,.08)}
  .nav-link[aria-current="page"]{background:rgba(198,242,78,.11);border-left:2px solid var(--lime)}
  .nav-link[aria-current="page"]::after{display:none}
  .rail__actions{flex-direction:row;margin-top:18px}
  .rail__actions .btn{flex:1}
  .rail__tagline{margin-top:14px;font-size:11px;color:var(--muted)}
  .rail__progress{left:0;top:var(--bar-h)}
}
@media (max-width:767px){
  .foot__grid{grid-template-columns:1fr 1fr;padding-block:40px 28px}
  .foot__brand{grid-column:span 2}
  .foot__col:last-child{grid-column:span 2}
  .section-head{flex-direction:column;align-items:flex-start}
  .foot__base{flex-direction:column;align-items:flex-start}
}
@media (min-width:1024px) and (max-height:760px){
  .rail{padding:12px 12px 14px;gap:10px}
  .nav-link{padding:6px 6px}
  .nav-link__label{font-size:13px}
  .rail__tagline{display:none}
}

/* ---------- 16. 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;
  }
  .has-js [data-reveal]{opacity:1;transform:none}
  .btn:hover{transform:none}
}