/* =========================================================
   飞亚体育入口 — 共享样式表 /assets/site.css
   极简文字建筑 · 夜场墨绿 + 暖纸白 + 荧光青柠
   ========================================================= */

:root{
  --night:#0B1F19;
  --mid:#123A2C;
  --line:#1E5945;
  --lime:#C9F227;
  --paper:#F2E9D8;
  --paper-2:#E4D9C3;
  --orange:#FF7A2F;
  --ash:#6C7A72;
  --ink:#0F0F0D;
  --jade:#4FC3A1;
  --sand:#E9C46A;

  --font-display:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-body:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;

  --step-xs:12px;
  --step-sm:14px;
  --step-base:17px;
  --step-lg:22px;
  --step-xl:30px;
  --step-2xl:44px;
  --step-3xl:64px;
  --step-4xl:96px;

  --gap:24px;
  --pad:clamp(18px,4vw,44px);
  --maxw:1240px;
  --header-h:clamp(66px,7vw,80px);
  --ease:cubic-bezier(.2,.7,.2,1);
  --cut:14px;
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
html.nav-locked{overflow:hidden;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:var(--step-base);
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4,p,figure,blockquote,dl,dd{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
img,picture,video,svg{display:block;max-width:100%;}
button,input,select,textarea{font:inherit;color:inherit;}
a{color:inherit;text-decoration:none;}
table{border-collapse:collapse;width:100%;}
hr{border:0;border-top:1px solid rgba(15,15,13,.16);margin:0;}

:focus-visible{
  outline:3px solid var(--lime);
  outline-offset:2px;
  box-shadow:0 0 0 1px var(--night);
}

/* ---------- 排版基元 ---------- */
.mono{
  font-family:var(--font-mono);
  letter-spacing:.04em;
  font-variant-numeric:tabular-nums;
}
.wrap{
  width:100%;
  max-width:calc(var(--maxw) + 2 * var(--pad));
  margin-inline:auto;
  padding-inline:var(--pad);
}
.wrap--narrow{max-width:calc(760px + 2 * var(--pad));}
.wrap--wide{max-width:calc(1480px + 2 * var(--pad));}

.section{padding-block:clamp(48px,7vw,104px);}
.section--paper{background:var(--paper);color:var(--ink);}
.section--dark{background:var(--night);color:var(--paper);}
.section--dark .chapter-tag,
.section--dark .eyebrow{color:rgba(242,233,216,.62);}
.section--dark .lede{color:rgba(242,233,216,.86);}

.chapter-tag{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:var(--step-xs);
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--ash);
}
.chapter-tag::before{
  content:"";
  width:22px;
  height:2px;
  background:currentColor;
  transform:skewX(-24deg);
}
.eyebrow{
  font-family:var(--font-mono);
  font-size:var(--step-xs);
  letter-spacing:.12em;
  color:var(--ash);
}
.lede{
  font-size:var(--step-lg);
  line-height:1.7;
  max-width:30ch;
  color:var(--ink);
}
.prose{font-size:var(--step-base);line-height:1.85;}
.prose p{max-width:34ch;margin-bottom:1.4em;}
.prose p:last-child{margin-bottom:0;}
.prose h2{
  font-family:var(--font-display);
  font-stretch:condensed;
  font-weight:900;
  letter-spacing:-.02em;
  font-size:var(--step-xl);
  line-height:1.25;
  margin-block:1.6em .6em;
}
.prose h3{
  font-family:var(--font-display);
  font-weight:800;
  font-size:var(--step-lg);
  line-height:1.35;
  margin-block:1.4em .5em;
}
.rule{
  height:1px;
  background:linear-gradient(90deg,var(--line),rgba(30,89,69,.08));
  border:0;
  margin-block:clamp(28px,4vw,56px);
}
.rule--paper{background:linear-gradient(90deg,rgba(15,15,13,.28),rgba(15,15,13,.06));}

.display-1,.display-2,.display-3{
  font-family:var(--font-display);
  font-stretch:condensed;
  font-weight:900;
  letter-spacing:-.02em;
  line-height:1.02;
}
.display-1{font-size:clamp(44px,9vw,96px);}
.display-2{font-size:clamp(32px,5.6vw,64px);}
.display-3{font-size:clamp(24px,3.4vw,44px);}

/* ---------- 12 栏网格 ---------- */
.grid-12{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:var(--gap);
}
.grid{display:grid;gap:var(--gap);}
.grid-12 > *{grid-column:span 12;min-width:0;}
@media (min-width:721px){
  .grid-12 > .span-3{grid-column:span 3;}
  .grid-12 > .span-4{grid-column:span 4;}
  .grid-12 > .span-5{grid-column:span 5;}
  .grid-12 > .span-6{grid-column:span 6;}
  .grid-12 > .span-7{grid-column:span 7;}
  .grid-12 > .span-8{grid-column:span 8;}
  .grid-12 > .span-9{grid-column:span 9;}
  .grid-12 > .span-12{grid-column:span 12;}
}
.stack{display:flex;flex-direction:column;gap:var(--gap);}
.cluster{display:flex;flex-wrap:wrap;gap:12px;align-items:center;}

.visually-hidden{
  position:absolute!important;
  width:1px;height:1px;
  margin:-1px;padding:0;
  overflow:hidden;clip:rect(0 0 0 0);
  white-space:nowrap;border:0;
}

/* ---------- 跳至主内容 ---------- */
.skip-link{
  position:fixed;
  top:-120px;
  left:16px;
  z-index:200;
  padding:12px 20px;
  background:var(--lime);
  color:var(--night);
  font-family:var(--font-mono);
  font-size:var(--step-sm);
  letter-spacing:.06em;
  transition:top .2s var(--ease);
}
.skip-link:focus{top:12px;}

/* =========================================================
   头部
   ========================================================= */
.site-header{
  position:sticky;
  top:0;
  z-index:90;
  background:var(--night);
  color:var(--paper);
  border-bottom:1px solid var(--line);
}
.site-header::before{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background-image:
    linear-gradient(rgba(242,233,216,.035) 1px,transparent 1px),
    linear-gradient(90deg,rgba(242,233,216,.035) 1px,transparent 1px);
  background-size:26px 26px;
}
.header-inner{
  position:relative;
  display:flex;
  align-items:center;
  gap:clamp(10px,1.6vw,22px);
  height:var(--header-h);
  width:100%;
  max-width:calc(var(--maxw) + 2 * var(--pad));
  margin-inline:auto;
  padding-inline:var(--pad);
  transition:height .26s var(--ease);
}
.site-header.is-condensed .header-inner{height:56px;}

.brand{
  display:flex;
  flex-direction:column;
  justify-content:center;
  gap:1px;
  line-height:1.1;
  flex:0 0 auto;
}
.brand-mark{
  font-family:var(--font-display);
  font-stretch:condensed;
  font-weight:900;
  font-size:19px;
  letter-spacing:-.02em;
  color:var(--paper);
}
.brand-domain{
  font-family:var(--font-mono);
  font-size:var(--step-xs);
  letter-spacing:.1em;
  color:rgba(242,233,216,.5);
}

.header-index{
  display:flex;
  align-items:baseline;
  gap:7px;
  margin-inline-start:auto;
  font-family:var(--font-mono);
  font-size:var(--step-xs);
  letter-spacing:.12em;
  color:rgba(242,233,216,.42);
  white-space:nowrap;
}
.header-index-no{
  color:var(--lime);
  font-variant-numeric:tabular-nums;
}

.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  padding:9px 14px;
  background:transparent;
  border:1px solid var(--line);
  color:var(--paper);
  font-family:var(--font-mono);
  font-size:var(--step-xs);
  letter-spacing:.12em;
  cursor:pointer;
  clip-path:polygon(0 0,calc(100% - 10px) 0,100% 10px,100% 100%,0 100%);
  transition:border-color .2s var(--ease),color .2s var(--ease);
}
.nav-toggle[aria-expanded="true"]{border-color:var(--lime);color:var(--lime);}
.nav-toggle-bars{display:flex;flex-direction:column;gap:3px;width:16px;}
.nav-toggle-bars i{display:block;height:1.5px;background:currentColor;transition:transform .22s var(--ease),opacity .22s var(--ease);}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:nth-child(1){transform:translateY(4.5px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:nth-child(3){transform:translateY(-4.5px) rotate(-45deg);}
.nav-toggle-label{line-height:1;}

.site-nav{
  display:flex;
  align-items:center;
  gap:clamp(10px,1.8vw,26px);
}
.nav-list{
  display:flex;
  align-items:center;
  gap:clamp(6px,1.3vw,20px);
}
.nav-link{
  position:relative;
  display:block;
  padding:7px 2px;
  font-size:var(--step-sm);
  letter-spacing:.04em;
  color:rgba(242,233,216,.74);
  transition:color .2s var(--ease);
}
.nav-link::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:0;
  height:2px;
  background:var(--lime);
  transform:scaleX(0) skewX(-24deg);
  transform-origin:left center;
  transition:transform .24s var(--ease);
}
.nav-link:hover{color:var(--paper);}
.nav-link:hover::after{transform:scaleX(.45) skewX(-24deg);}
.nav-link[aria-current="page"]{color:var(--lime);}
.nav-link[aria-current="page"]::after{transform:scaleX(1) skewX(-24deg);}

.nav-group{display:none;}
.nav-cta-row{display:flex;align-items:center;}

.header-rail{
  position:relative;
  height:3px;
  background:rgba(242,233,216,.1);
  overflow:hidden;
}
.rail-fill{
  position:absolute;
  inset:0 auto 0 0;
  width:0;
  background:linear-gradient(90deg,var(--lime),var(--jade));
  transition:width .12s linear;
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:11px 18px;
  border:1px solid transparent;
  background:transparent;
  font-family:var(--font-mono);
  font-size:var(--step-sm);
  letter-spacing:.06em;
  line-height:1.2;
  cursor:pointer;
  clip-path:polygon(0 0,calc(100% - 12px) 0,100% 12px,100% 100%,0 100%);
  transition:background-color .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
}
.btn:hover{transform:translateY(-1px);}
.btn--lime{background:var(--lime);color:var(--night);border-color:var(--lime);}
.btn--lime:hover{background:#d8fb4d;border-color:#d8fb4d;}
.btn--ghost{border-color:var(--lime);color:var(--lime);}
.btn--ghost:hover{background:var(--lime);color:var(--night);}
.btn--ink{background:var(--mid);color:var(--paper);border-color:var(--mid);}
.btn--ink:hover{background:var(--night);border-color:var(--night);}

/* =========================================================
   卡片 / 标签 / 图形
   ========================================================= */
.card{
  background:var(--paper-2);
  border:1px solid rgba(15,15,13,.14);
  padding:20px;
  clip-path:polygon(0 0,calc(100% - var(--cut)) 0,100% var(--cut),100% 100%,0 100%);
}
.card--dark{
  background:var(--mid);
  border-color:var(--line);
  color:var(--paper);
}
.card--dark .eyebrow,
.card--dark .chapter-tag{color:rgba(242,233,216,.58);}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 10px;
  font-family:var(--font-mono);
  font-size:var(--step-xs);
  letter-spacing:.1em;
  border:1px solid rgba(15,15,13,.2);
  color:var(--ink);
}
.tag--lime{background:var(--lime);border-color:var(--lime);color:var(--night);}
.tag--dark{background:var(--mid);border-color:var(--line);color:var(--paper);}

.city-tag{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:var(--step-xs);
  letter-spacing:.12em;
  color:var(--ink);
}
.city-tag::before{
  content:"";
  width:10px;
  height:10px;
  background:var(--city,var(--jade));
  clip-path:polygon(0 0,100% 0,100% 68%,68% 100%,0 100%);
}
.city-tag--bj{--city:var(--orange);}
.city-tag--sh{--city:var(--lime);}
.city-tag--cd{--city:var(--jade);}
.city-tag--gz{--city:var(--sand);}
.section--dark .city-tag{color:var(--paper);}

.metric{display:flex;flex-direction:column;gap:6px;}
.stat-figure{
  font-family:var(--font-mono);
  font-size:var(--step-2xl);
  line-height:1;
  letter-spacing:.02em;
  font-variant-numeric:tabular-nums;
  color:var(--ink);
}
.section--dark .stat-figure,
.card--dark .stat-figure{color:var(--lime);}

/* ---------- 图片容器 ---------- */
.media-frame{
  position:relative;
  display:block;
  width:100%;
  overflow:hidden;
  background:var(--mid);
  border:1px solid var(--line);
  clip-path:polygon(0 0,calc(100% - 18px) 0,100% 18px,100% 100%,0 100%);
}
.media-frame img{
  width:100%;
  height:100%;
  object-fit:cover;
}
.media-frame--16x9{aspect-ratio:16/9;}
.media-frame--4x3{aspect-ratio:4/3;}
.media-frame--1x1{aspect-ratio:1/1;}
.media-frame--21x9{aspect-ratio:21/9;}
@media (max-width:640px){
  .media-frame--21x9{aspect-ratio:16/9;}
}
.media-ph{
  position:absolute;
  inset:0;
  display:flex;
  align-items:flex-end;
  padding:16px;
  background-color:var(--mid);
  background-image:repeating-linear-gradient(135deg,rgba(30,89,69,.55) 0 1px,transparent 1px 12px);
  color:rgba(242,233,216,.6);
  font-family:var(--font-mono);
  font-size:var(--step-xs);
  letter-spacing:.12em;
}

/* ---------- 面包屑 ---------- */
.breadcrumbs{padding-block:18px 0;}
.breadcrumb-list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:var(--step-xs);
  letter-spacing:.08em;
  color:var(--ash);
}
.breadcrumb-list li{display:flex;align-items:center;gap:8px;}
.breadcrumb-list li + li::before{
  content:"/";
  color:rgba(108,122,114,.6);
  transform:skewX(-14deg);
}
.breadcrumb-list a{color:var(--ash);transition:color .2s var(--ease);}
.breadcrumb-list a:hover{color:var(--ink);}
.breadcrumb-list [aria-current="page"]{color:var(--ink);}

/* ---------- 分段标签 ---------- */
.segmented{margin-block:clamp(24px,4vw,44px);}
.segmented-bar{
  position:relative;
  display:flex;
  flex-wrap:wrap;
  gap:4px;
  border-bottom:1px solid rgba(15,15,13,.16);
}
.segmented-btn{
  appearance:none;
  background:none;
  border:0;
  cursor:pointer;
  padding:11px 16px;
  font-family:var(--font-mono);
  font-size:var(--step-sm);
  letter-spacing:.06em;
  color:var(--ash);
  transition:color .2s var(--ease);
}
.segmented-btn:hover{color:var(--ink);}
.segmented-btn[aria-selected="true"]{color:var(--ink);}
.segmented-indicator{
  position:absolute;
  bottom:-1px;
  left:0;
  width:0;
  height:3px;
  background:var(--lime);
  transform:skewX(-24deg);
  transition:left .24s var(--ease),width .24s var(--ease);
}
.segmented-panel{padding-top:24px;animation:segFade .2s var(--ease);}
.segmented-panel[hidden]{display:none;}
@keyframes segFade{from{opacity:0;}to{opacity:1;}}
.section--dark .segmented-bar{border-bottom-color:rgba(242,233,216,.18);}
.section--dark .segmented-btn{color:rgba(242,233,216,.6);}
.section--dark .segmented-btn:hover,
.section--dark .segmented-btn[aria-selected="true"]{color:var(--paper);}

/* ---------- 滚动渐显 ---------- */
.reveal{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .32s var(--ease),transform .32s var(--ease);
}
.reveal.is-in{opacity:1;transform:none;}

/* =========================================================
   页脚
   ========================================================= */
.site-footer{
  position:relative;
  background:var(--night);
  color:var(--paper);
  border-top:1px solid var(--line);
  overflow:hidden;
}
.site-footer::before{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background-image:
    linear-gradient(rgba(242,233,216,.03) 1px,transparent 1px),
    linear-gradient(90deg,rgba(242,233,216,.03) 1px,transparent 1px);
  background-size:26px 26px;
}
.site-footer::after{
  content:"";
  position:absolute;
  top:0;right:-60px;
  width:min(38vw,420px);
  height:3px;
  background:var(--lime);
  transform:skewX(-38deg);
  transform-origin:right top;
}
.footer-inner{position:relative;}

.footer-top{
  display:grid;
  grid-template-columns:minmax(220px,1fr) 2fr;
  gap:44px 56px;
  padding-block:clamp(48px,6vw,84px) clamp(28px,4vw,48px);
}
.footer-brand{display:flex;flex-direction:column;gap:6px;}
.footer-logo{
  font-family:var(--font-display);
  font-stretch:condensed;
  font-weight:900;
  font-size:var(--step-lg);
  letter-spacing:-.02em;
  color:var(--paper);
}
.footer-domain{
  font-family:var(--font-mono);
  font-size:var(--step-xs);
  letter-spacing:.12em;
  color:var(--lime);
}
.footer-tag{
  margin-top:14px;
  max-width:30ch;
  font-size:var(--step-sm);
  line-height:1.8;
  color:rgba(242,233,216,.66);
}
.footer-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:32px 24px;
}
.footer-block{display:flex;flex-direction:column;gap:14px;}
.footer-title{
  font-family:var(--font-mono);
  font-size:var(--step-xs);
  font-weight:400;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:rgba(242,233,216,.5);
}
.footer-list{display:flex;flex-direction:column;gap:9px;}
.footer-link{
  position:relative;
  display:inline-block;
  font-size:var(--step-sm);
  line-height:1.6;
  color:rgba(242,233,216,.82);
  transition:color .2s var(--ease),padding-left .2s var(--ease);
}
.footer-link::before{
  content:"";
  position:absolute;
  left:0;top:50%;
  width:0;
  height:2px;
  background:var(--lime);
  transform:translateY(-50%) skewX(-24deg);
  transition:width .2s var(--ease);
}
.footer-link:hover{color:var(--lime);padding-left:16px;}
.footer-link:hover::before{width:10px;}

.footer-contact{
  display:flex;
  flex-direction:column;
  gap:8px;
  padding-block:clamp(24px,3vw,36px);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.footer-contact-line{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
  font-size:var(--step-sm);
  color:var(--paper);
}
.footer-sep{color:var(--line);}
.footer-address{
  font-size:var(--step-sm);
  color:rgba(242,233,216,.7);
}
.footer-note{
  max-width:58ch;
  font-size:var(--step-xs);
  line-height:1.8;
  color:var(--ash);
}

.footer-legal{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding-block:clamp(20px,2.6vw,32px) clamp(28px,4vw,48px);
  font-size:var(--step-xs);
  color:rgba(242,233,216,.5);
}
.footer-icp{letter-spacing:.08em;}
.footer-copy{letter-spacing:.08em;}

/* =========================================================
   响应式
   ========================================================= */
@media (max-width:1080px){
  .nav-link{font-size:var(--step-xs);}
  .header-index{display:none;}
}

@media (max-width:980px){
  .nav-toggle{display:inline-flex;margin-inline-start:auto;}
  .site-nav{
    position:fixed;
    inset:0;
    z-index:70;
    display:flex;
    flex-direction:column;
    align-items:stretch;
    gap:34px;
    padding:calc(var(--header-h) + 28px) var(--pad) 56px;
    background:var(--night);
    border-top:1px solid var(--line);
    overflow-y:auto;
    opacity:0;
    visibility:hidden;
    pointer-events:none;
    transform:translateY(-10px);
    transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s;
  }
  .site-nav[data-open]{
    opacity:1;
    visibility:visible;
    pointer-events:auto;
    transform:none;
  }
  .nav-list{flex-direction:column;align-items:stretch;gap:0;}
  .nav-item + .nav-item{border-top:1px solid var(--line);}
  .nav-link{
    padding:16px 0;
    font-family:var(--font-display);
    font-stretch:condensed;
    font-weight:800;
    font-size:var(--step-xl);
    letter-spacing:-.01em;
    color:rgba(242,233,216,.82);
  }
  .nav-link::after{display:none;}
  .nav-link[aria-current="page"]{color:var(--lime);}
  .nav-group{display:flex;flex-direction:column;gap:14px;}
  .nav-group-title{
    font-family:var(--font-mono);
    font-size:var(--step-xs);
    letter-spacing:.16em;
    text-transform:uppercase;
    color:rgba(242,233,216,.45);
  }
  .nav-city-list{
    display:grid;
    grid-template-columns:repeat(2,minmax(0,1fr));
    gap:10px 20px;
  }
  .nav-city-item{
    font-size:var(--step-sm);
    color:rgba(242,233,216,.72);
    padding-left:14px;
    position:relative;
  }
  .nav-city-item::before{
    content:"";
    position:absolute;
    left:0;top:.72em;
    width:7px;height:7px;
    background:var(--jade);
    clip-path:polygon(0 0,100% 0,100% 68%,68% 100%,0 100%);
  }
  .nav-cta-row{margin-top:auto;}
  .nav-cta-row .btn{width:100%;padding:16px 18px;font-size:var(--step-base);}
  .footer-top{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
}

@media (max-width:640px){
  :root{--gap:18px;--pad:18px;}
  .grid-12{grid-template-columns:repeat(6,minmax(0,1fr));}
  .grid-12 > *{grid-column:span 6;}
  .display-1{font-size:clamp(34px,11vw,52px);}
  .lede{max-width:100%;}
  .prose p{max-width:100%;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-legal{flex-direction:column;align-items:flex-start;}
  .segmented-btn{padding:10px 12px;font-size:var(--step-xs);}
}

@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{
    animation-duration:.01ms!important;
    animation-iteration-count:1!important;
    transition-duration:.01ms!important;
  }
  html{scroll-behavior:auto!important;}
  .reveal{opacity:1!important;transform:none!important;}
  .btn:hover{transform:none;}
}