/* ============================================================
   飞亚体育 · 共享样式 /assets/site.css
   ============================================================ */

/* ---------- 01 变量 ---------- */
:root{
  --red:#E10600;
  --red-dark:#6B0400;
  --carbon:#121212;
  --carbon-2:#1C1C1F;
  --panel:#26262B;
  --blue:#00A3FF;
  --lime:#C6FF00;
  --ice:#F4F6F8;
  --fog:#A0A6AD;
  --paper:#EDEAE3;

  --line:rgba(244,246,248,.12);
  --line-strong:rgba(244,246,248,.24);

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

  --header-h:72px;
  --shell:1280px;
  --gutter:20px;
  --shadow-panel:0 24px 46px -34px rgba(0,0,0,.95);
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ---------- 02 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,figure,blockquote,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video{display:block;max-width:100%;height:auto}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
a{color:inherit;text-decoration:none}
table{border-collapse:collapse;width:100%}

/* ---------- 03 基底与中文排版 ---------- */
body{
  background-color:var(--carbon);
  background-image:repeating-linear-gradient(115deg,rgba(244,246,248,.03) 0 1px,transparent 1px 10px);
  color:var(--ice);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.75;
  letter-spacing:.005em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
h1,h2,h3,h4{font-family:var(--font-display);font-weight:900;line-height:1.1;letter-spacing:-.012em}
h1{font-size:clamp(38px,6.2vw,86px)}
h2{font-size:clamp(27px,3.5vw,46px)}
h3{font-size:clamp(19px,1.9vw,25px)}
h4{font-size:17px}
p{max-width:70ch}
strong{font-weight:900;color:var(--ice)}
.mono,.stat__value,.sec-num,.footer-brand__line,.footer-contact,.footer-legal,.eyebrow,.tag,.breadcrumb,.nav-toggle__label{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-weight:600;
}
::selection{background:var(--red);color:#fff}

/* ---------- 04 可访问性 ---------- */
:focus-visible{outline:2px solid var(--lime);outline-offset:3px}
.skip-link{
  position:fixed;top:-90px;left:16px;z-index:300;
  background:var(--red);color:#fff;
  padding:11px 18px;font-size:14px;font-weight:700;letter-spacing:.06em;
  transition:top .2s var(--ease);
}
.skip-link:focus{top:12px}
#main-content{scroll-margin-top:calc(var(--header-h) + 16px)}

/* ---------- 05 布局骨架 ---------- */
.shell,
.header-inner,
.footer-inner,
.footer-meta{
  width:min(calc(100% - (var(--gutter) * 2)),var(--shell));
  margin-inline:auto;
}
.grid-12{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:20px}
.col-4{grid-column:span 4}
.col-5{grid-column:span 5}
.col-6{grid-column:span 6}
.col-7{grid-column:span 7}
.col-8{grid-column:span 8}
.col-12{grid-column:span 12}
.section{padding:clamp(48px,7vw,94px) 0}
.section--tight{padding:clamp(30px,4vw,52px) 0}
.section-head{display:grid;gap:12px;max-width:58ch}
.page-top{padding-top:calc(var(--header-h) + clamp(20px,4vw,48px))}

/* ---------- 06 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:13px 22px;
  border:1px solid var(--line-strong);
  background:var(--carbon-2);
  color:var(--ice);
  font-family:var(--font-display);font-weight:900;font-size:15px;letter-spacing:.06em;
  clip-path:polygon(10px 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%,0 10px);
  transition:transform .22s var(--ease),background .22s var(--ease),border-color .22s var(--ease),color .22s var(--ease);
}
.btn:hover{transform:translateY(-2px)}
.btn--primary{background:var(--red);border-color:var(--red);color:#fff}
.btn--primary:hover{background:#ff1c14;border-color:#ff1c14}
.btn--ghost{background:transparent;border-color:var(--red);color:var(--ice)}
.btn--ghost:hover{background:rgba(225,6,0,.18);border-color:var(--red)}
.btn--line{background:transparent;border-color:var(--line-strong)}
.btn--line:hover{border-color:var(--blue);color:var(--blue)}

/* ---------- 07 页头 ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:120;
  color:var(--ice);
  background:linear-gradient(180deg,rgba(18,18,18,.9) 0%,rgba(18,18,18,0) 100%);
  border-bottom:1px solid transparent;
  transition:background .3s var(--ease),border-color .3s var(--ease),box-shadow .3s var(--ease);
}
.site-header[data-scrolled="true"],
.site-header[data-nav-open="true"]{
  background:var(--carbon);
  border-bottom-color:var(--line);
  box-shadow:0 26px 54px -42px #000;
}
.header-inner{
  display:flex;align-items:center;gap:18px;
  height:var(--header-h);
}
.brand{display:flex;align-items:center;gap:11px;flex:none;padding:4px}
.brand-mark{display:grid;gap:3px;width:28px;flex:none}
.brand-mark__bar{display:block;height:4px;background:var(--red)}
.brand-mark__bar:nth-child(2){width:72%;background:var(--ice)}
.brand-mark__bar:nth-child(3){width:44%;background:var(--blue)}
.brand-text{display:grid;line-height:1.15}
.brand-name{font-family:var(--font-display);font-weight:900;font-size:19px;letter-spacing:.05em}
.brand-line{font-size:10.5px;letter-spacing:.26em;color:var(--fog)}

.site-nav{margin-left:auto}
.nav-list{display:flex;align-items:center;gap:2px}
.nav-list a{
  position:relative;display:block;
  padding:10px 13px;
  font-size:14.5px;color:var(--fog);white-space:nowrap;
  transition:color .2s var(--ease);
}
.nav-list a::after{
  content:"";position:absolute;left:13px;right:13px;bottom:4px;height:3px;
  background:var(--red);
  transform:scaleX(0);transform-origin:left center;
  transition:transform .26s var(--ease);
}
.nav-list a:hover{color:var(--ice)}
.nav-list a:hover::after{transform:scaleX(1)}
.nav-list a[aria-current="page"]{color:var(--ice)}
.nav-list a[aria-current="page"]::after{transform:scaleX(1)}

.header-actions{display:flex;align-items:center;gap:10px;margin-left:12px}
.header-cta{padding:10px 16px;font-size:13.5px}
.nav-toggle{
  display:none;align-items:center;gap:9px;
  padding:9px 12px;
  border:1px solid var(--line-strong);
  color:var(--ice);
  font-size:12px;letter-spacing:.14em;
}
.nav-toggle__bars{display:grid;gap:4px;width:18px}
.nav-toggle__bars span{display:block;height:2px;background:var(--ice);transition:transform .22s var(--ease),opacity .22s var(--ease)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span: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(--red) 0%,var(--blue) 68%,var(--lime) 100%);
  transform:scaleX(0);transform-origin:left center;
}

/* ---------- 08 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(56px,8vw,110px);
  background:var(--carbon-2);
  border-top:1px solid var(--line);
  overflow:hidden;
}
.footer-slash{
  height:8px;
  background:linear-gradient(90deg,var(--red) 0%,var(--red) 36%,var(--blue) 36%,var(--blue) 64%,var(--lime) 64%,var(--lime) 100%);
  clip-path:polygon(0 0,100% 0,calc(100% - 28px) 100%,0 100%);
}
.footer-inner{
  display:grid;
  grid-template-columns:minmax(230px,1.3fr) repeat(4,minmax(0,1fr));
  gap:34px;
  padding:clamp(34px,5vw,58px) 0 clamp(26px,4vw,40px);
}
.footer-brand__name{display:block;font-family:var(--font-display);font-weight:900;font-size:24px;letter-spacing:.05em}
.footer-brand__line{display:block;margin-top:9px;font-size:11.5px;letter-spacing:.14em;color:var(--fog)}
.footer-brand__note{margin-top:16px;font-size:14px;line-height:1.85;color:var(--fog);max-width:34ch}
.footer-col{border-top:1px solid var(--line);padding-top:16px}
.footer-col__title{
  font-family:var(--font-mono);font-size:12px;font-weight:600;
  letter-spacing:.2em;color:var(--lime);
  margin-bottom:14px;
}
.footer-col ul{display:grid;gap:9px}
.footer-col a{font-size:14.5px;color:var(--fog);transition:color .2s var(--ease)}
.footer-col a:hover{color:var(--ice)}
.footer-meta{
  display:flex;flex-wrap:wrap;gap:10px 30px;justify-content:space-between;
  padding:20px 0 36px;
  border-top:1px solid var(--line);
}
.footer-contact,.footer-legal{font-size:12.5px;color:var(--fog);letter-spacing:.02em;max-width:none}
.footer-legal::before{content:"";display:inline-block;width:8px;height:8px;background:var(--red);margin-right:9px}

/* ---------- 09 通用组件 ---------- */
.panel{
  position:relative;
  background:var(--panel);
  border:1px solid var(--line);
  padding:clamp(20px,2.6vw,30px);
  box-shadow:var(--shadow-panel);
}
.panel--paper{
  background-color:var(--paper);
  background-image:repeating-linear-gradient(0deg,rgba(18,18,18,.05) 0 1px,transparent 1px 26px);
  border-color:#d5cfc2;
  color:var(--carbon);
}
.panel--paper *{color:inherit}
.panel--red{background:var(--red);border-color:var(--red);color:#fff}
.panel--red *{color:#fff}
.panel--edge::before{
  content:"";position:absolute;left:0;top:22px;bottom:22px;width:4px;background:var(--red);
}

.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:12px;letter-spacing:.22em;color:var(--fog);text-transform:uppercase;
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--red);flex:none}
.sec-num{display:inline-block;font-size:13px;font-weight:700;color:var(--red);letter-spacing:.14em}
.note-vertical{
  writing-mode:vertical-rl;
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.32em;
  color:var(--fog);text-transform:uppercase;
}

.tag{
  display:inline-flex;align-items:center;gap:7px;
  padding:4px 10px;
  font-size:12px;letter-spacing:.12em;
  border:1px solid var(--line-strong);
  background:rgba(244,246,248,.04);
  color:var(--fog);
}
.tag__dot{width:6px;height:6px;background:currentColor;border-radius:50%;flex:none}
.tag--live{background:var(--lime);border-color:var(--lime);color:var(--carbon)}
.tag--hot{background:var(--red);border-color:var(--red);color:#fff}
.tag--blue{border-color:var(--blue);color:var(--blue)}

.breadcrumb{padding:16px 0;font-size:12px;color:var(--fog);letter-spacing:.08em}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.breadcrumb li{display:flex;align-items:center;gap:8px}
.breadcrumb li::after{content:"/";color:var(--line-strong)}
.breadcrumb li:last-child::after{content:""}
.breadcrumb a:hover{color:var(--blue)}

.prose{max-width:74ch}
.prose > * + *{margin-top:1.1em}
.prose h2{margin-top:1.9em;font-size:clamp(23px,2.6vw,34px)}
.prose h3{margin-top:1.5em}
.prose ul{display:grid;gap:.6em;padding-left:1.15em}
.prose ul li{position:relative}
.prose ul li::before{content:"";position:absolute;left:-1.1em;top:.75em;width:9px;height:2px;background:var(--red)}
.prose a{color:var(--blue);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:2px}
.prose blockquote{
  border-left:4px solid var(--red);
  padding:4px 0 4px 18px;
  color:var(--fog);
}

.media-frame{
  position:relative;display:block;width:100%;aspect-ratio:16/9;overflow:hidden;
  border:1px solid var(--line);
  background-color:var(--carbon-2);
  background-image:
    repeating-linear-gradient(115deg,rgba(244,246,248,.07) 0 2px,transparent 2px 15px),
    linear-gradient(140deg,var(--carbon-2) 0%,var(--panel) 100%);
}
.media-frame img{width:100%;height:100%;object-fit:cover}
.media-frame--tall{aspect-ratio:4/5}
.media-frame--square{aspect-ratio:1/1}
.media-frame::after{
  content:attr(data-label);
  position:absolute;left:0;bottom:0;
  padding:6px 11px;
  background:var(--red);color:#fff;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;
}
.media-frame:not([data-label])::after{content:"飞亚体育 · 赛场图像"}

.stat{display:grid;gap:5px}
.stat__value{
  font-size:clamp(28px,4vw,44px);font-weight:700;line-height:1;
  color:var(--lime);letter-spacing:-.02em;
}
.stat__label{font-size:12.5px;color:var(--fog);letter-spacing:.08em}

[data-accordion]{display:grid;gap:10px}
[data-accordion-item]{border:1px solid var(--line);background:var(--carbon-2)}
[data-accordion-trigger]{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:16px 18px;text-align:left;
  font-family:var(--font-display);font-weight:900;font-size:17px;color:var(--ice);
}
[data-accordion-trigger]::after{
  content:"+";
  font-family:var(--font-mono);font-size:20px;line-height:1;color:var(--red);
  transition:transform .25s var(--ease);
}
[data-accordion-item][data-open="true"] [data-accordion-trigger]::after{transform:rotate(135deg)}
[data-accordion-panel]{display:none;padding:0 18px 18px;color:var(--fog);font-size:15.5px}
[data-accordion-item][data-open="true"] [data-accordion-panel]{display:block}

html.js .reveal{opacity:0;transform:translateY(16px)}
html.js .reveal.is-visible{
  opacity:1;transform:none;
  transition:opacity .5s var(--ease),transform .5s var(--ease);
}

.to-top{
  position:fixed;right:18px;bottom:18px;z-index:90;
  width:46px;height:46px;display:grid;place-items:center;
  border:1px solid var(--line-strong);
  background:var(--carbon-2);color:var(--ice);
  font-family:var(--font-mono);font-size:17px;
  clip-path:polygon(9px 0,100% 0,100% calc(100% - 9px),calc(100% - 9px) 100%,0 100%,0 9px);
  opacity:0;visibility:hidden;
  transition:opacity .25s var(--ease),visibility .25s var(--ease),border-color .2s var(--ease),color .2s var(--ease);
}
.to-top[data-visible="true"]{opacity:1;visibility:visible}
.to-top:hover{border-color:var(--red);color:var(--red)}

/* ---------- 10 响应式 ---------- */
@media (max-width:1080px){
  .footer-inner{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px}
  .footer-brand{grid-column:1 / -1}
}
@media (max-width:920px){
  :root{--header-h:64px;--gutter:18px}
  body{font-size:16.5px}
  .brand-line{display:none}
  .header-cta{display:none}
  .nav-toggle{display:inline-flex}
  .site-nav{
    position:fixed;left:0;right:0;top:var(--header-h);
    margin:0;
    padding:10px var(--gutter) 22px;
    background:var(--carbon-2);
    border-top:1px solid var(--line);
    border-bottom:1px solid var(--line);
    max-height:calc(100vh - var(--header-h));
    overflow-y:auto;
    opacity:0;visibility:hidden;transform:translateY(-10px);
    transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s var(--ease);
  }
  .site-nav[data-open="true"]{opacity:1;visibility:visible;transform:none}
  .nav-list{flex-direction:column;align-items:stretch;gap:0}
  .nav-list a{padding:14px 4px;font-size:16.5px;border-bottom:1px solid rgba(244,246,248,.07)}
  .nav-list a::after{display:none}
  .nav-list a[aria-current="page"]::before{
    content:"";display:inline-block;width:7px;height:7px;background:var(--red);
    margin-right:10px;vertical-align:middle;
  }
  .grid-12{gap:16px}
  .col-4,.col-5,.col-6,.col-7,.col-8{grid-column:1 / -1}
  .footer-meta{flex-direction:column;gap:8px}
}
@media (max-width:620px){
  :root{--gutter:15px}
  .footer-inner{grid-template-columns:minmax(0,1fr)}
  .footer-legal::before{display:none}
  .to-top{right:12px;bottom:12px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  html.js .reveal{opacity:1;transform:none}
  .btn:hover{transform:none}
}