/* =====================================================================
   K体育看台 · /assets/site.css
   共享外壳：品牌轨道 / 悬浮胶囊导航 / 档案夹页脚 / 基础组件
   ===================================================================== */

:root{
  --arena:#070A0F;
  --indigo:#111A2B;
  --indigo-deep:#0B1220;
  --teal:#0C2A2C;
  --wine:#2A0D1B;
  --green:#3BFFA5;
  --blue:#3AB6FF;
  --orange:#FF8A3D;
  --bone:#EAF0F6;
  --line:#2A3450;
  --yellow:#FFD166;
  --ink:#04140C;
  --muted:#93A1BA;
  --font-sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --font-mono:"JetBrains Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;
  --rail-w:220px;
  --dock-h:56px;
  --gap:24px;
  --ease:cubic-bezier(.2,.7,.2,1);
}

/* ------------------------------------------------ reset */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--arena);
  color:var(--bone);
  font-family:var(--font-sans);
  font-size:16px;
  font-weight:400;
  line-height:1.75;
  letter-spacing:.006em;
}
h1,h2,h3,h4,h5{margin:0;font-weight:900;line-height:1.18;letter-spacing:-.012em;color:var(--bone)}
h1{font-size:56px}
h2{font-size:40px}
h3{font-size:28px}
h4{font-size:20px}
p{margin:0 0 1.2em}
p:last-child{margin-bottom:0}
ul,ol{margin:0;padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
a{color:var(--blue);text-decoration:none;transition:color .16s var(--ease)}
a:hover{color:var(--green)}
:focus-visible{outline:2px solid var(--green);outline-offset:2px}
::selection{background:var(--green);color:var(--ink)}
[hidden]{display:none}
[data-filter-item][hidden]{display:none}

/* ------------------------------------------------ a11y 工具 */
.sr-only{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

.skip-link{
  position:fixed;left:16px;top:-64px;z-index:120;
  padding:10px 18px;
  background:var(--green);color:var(--ink);
  font-weight:800;font-size:14px;border-radius:2px;
  transition:top .18s var(--ease);
}
.skip-link:focus{top:16px;color:var(--ink)}

/* ------------------------------------------------ 布局 */
.wrap{width:100%;max-width:1180px;margin:0 auto;padding:0 32px}
#main-content{padding-left:var(--rail-w);padding-top:104px;min-height:60vh;scroll-margin-top:96px}
.section{padding:72px 0}
.section--tight{padding:48px 0}
.zone{border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.zone--indigo{background:var(--indigo)}
.zone--teal{background:var(--teal)}
.zone--wine{background:var(--wine)}

.grid{display:grid;gap:var(--gap)}
.grid--12{grid-template-columns:repeat(12,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--auto{grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}

/* ------------------------------------------------ 品牌轨道 + 悬浮胶囊导航 */
.site-header{position:relative;z-index:80}

.brand-rail{
  position:fixed;left:0;top:0;bottom:0;width:var(--rail-w);z-index:70;
  display:flex;flex-direction:column;gap:26px;
  padding:30px 20px 24px;
  background:var(--indigo);
  border-right:1px solid var(--line);
}
.brand{display:flex;align-items:center;gap:11px;color:var(--bone)}
.brand:hover{color:var(--bone)}
.brand__mark{
  flex:0 0 38px;width:38px;height:38px;
  display:grid;place-items:center;
  background:var(--green);color:var(--ink);
  font-family:var(--font-mono);font-weight:700;font-size:20px;
  border-radius:2px;
}
.brand__text{min-width:0}
.brand__name{display:block;font-size:19px;font-weight:900;line-height:1.15;letter-spacing:.01em}
.brand__tagline{
  display:block;margin-top:6px;
  font-family:var(--font-mono);font-size:11px;line-height:1.5;
  letter-spacing:.04em;color:var(--muted);
}

.rail-links{display:flex;flex-direction:column;gap:2px;border-top:1px solid var(--line);padding-top:16px}
.rail-links a{
  display:flex;align-items:center;gap:9px;
  padding:10px 10px;
  font-size:13.5px;color:var(--bone);
  border-left:2px solid transparent;
  transition:color .16s var(--ease),border-color .16s var(--ease),background .16s var(--ease);
}
.rail-links a::before{content:"";width:6px;height:6px;background:var(--line);flex:0 0 6px}
.rail-links a:hover{color:var(--green);border-left-color:var(--green);background:rgba(59,255,165,.06)}
.rail-links a:hover::before{background:var(--green)}
.rail-links a[aria-current="page"]{color:var(--green);border-left-color:var(--green)}

.rail-note{
  margin:auto 0 0;
  font-family:var(--font-mono);font-size:11px;line-height:1.8;
  letter-spacing:.04em;color:var(--muted);
}
.rail-note__dot{margin:0 6px;color:var(--line)}

.nav-dock{
  position:fixed;z-index:75;top:18px;left:calc(var(--rail-w) + 24px);right:24px;
  display:flex;align-items:center;gap:8px;
  height:var(--dock-h);padding:0 10px 0 16px;
  background:var(--indigo);
  border:1px solid var(--line);border-radius:999px;
  transition:height .18s var(--ease),top .18s var(--ease),background .18s var(--ease),border-color .18s var(--ease);
}

.nav{flex:1 1 auto;min-width:0;display:flex;justify-content:center;overflow-x:auto;scrollbar-width:none}
.nav::-webkit-scrollbar{display:none}
.nav__list{display:flex;align-items:center;gap:2px}
.nav__list a{
  position:relative;display:inline-flex;align-items:center;white-space:nowrap;
  height:36px;padding:0 13px;
  font-size:14px;font-weight:500;color:var(--bone);
  border-radius:999px;
  transition:color .16s var(--ease),background .16s var(--ease),box-shadow .16s var(--ease);
}
.nav__list a::after{
  content:"";position:absolute;left:13px;right:13px;bottom:4px;height:1px;
  background:var(--green);transform:scaleX(0);transform-origin:left;
  transition:transform .18s var(--ease);
}
.nav__list a:hover{color:var(--green);background:rgba(59,255,165,.08)}
.nav__list a:hover::after{transform:scaleX(1)}
.nav__list a[aria-current="page"]{
  color:var(--green);background:rgba(59,255,165,.1);
  box-shadow:inset 0 0 0 1px rgba(59,255,165,.35);
}
.nav__list a[aria-current="page"]::after{transform:scaleX(1)}

.nav-toggle{
  display:none;align-items:center;gap:8px;
  height:38px;padding:0 12px;
  border:1px solid var(--line);border-radius:999px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;color:var(--bone);
  transition:border-color .16s var(--ease),color .16s var(--ease);
}
.nav-toggle:hover{border-color:var(--green);color:var(--green)}
.nav-toggle__bars{position:relative;width:16px;height:10px;flex:0 0 16px}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";position:absolute;left:0;width:16px;height:1.5px;background:currentColor;
  transition:transform .18s var(--ease),top .18s var(--ease);
}
.nav-toggle__bars::before{top:1px}
.nav-toggle__bars::after{top:8px}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{top:5px;transform:rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{top:5px;transform:rotate(-45deg)}

.search-toggle{
  flex:0 0 auto;display:inline-flex;align-items:center;justify-content:center;
  width:38px;height:38px;
  border:1px solid var(--line);border-radius:999px;color:var(--bone);
  transition:color .16s var(--ease),border-color .16s var(--ease),background .16s var(--ease);
}
.search-toggle:hover{color:var(--green);border-color:var(--green);background:rgba(59,255,165,.08)}
.search-toggle[aria-expanded="true"]{color:var(--ink);background:var(--green);border-color:var(--green)}

.dock-cta{
  flex:0 0 auto;display:inline-flex;align-items:center;
  height:36px;padding:0 16px;border-radius:999px;
  background:var(--green);color:var(--ink);
  font-size:14px;font-weight:800;letter-spacing:.02em;
  transition:transform .16s var(--ease),box-shadow .16s var(--ease),background .16s var(--ease);
}
.dock-cta:hover{background:#66FFBB;color:var(--ink);transform:translateY(-1px);box-shadow:0 8px 20px rgba(59,255,165,.24)}

/* 检索面板 */
.search-panel{
  position:absolute;top:calc(100% + 10px);right:0;
  width:min(440px,calc(100vw - 48px));
  padding:18px;
  background:var(--indigo-deep);
  border:1px solid var(--line);border-radius:2px;
  box-shadow:0 24px 48px rgba(0,0,0,.55);
}
.search-panel__title{
  margin:0 0 12px;
  font-family:var(--font-mono);font-size:11px;font-weight:500;
  letter-spacing:.14em;color:var(--muted);
}
.chip-row{display:flex;flex-wrap:wrap;gap:6px}
.chip{
  display:inline-flex;align-items:center;
  height:30px;padding:0 12px;
  border:1px solid var(--line);border-radius:2px;
  font-family:var(--font-mono);font-size:12px;font-weight:500;letter-spacing:.06em;
  color:var(--bone);
  transition:color .16s var(--ease),border-color .16s var(--ease),background .16s var(--ease);
}
.chip:hover{color:var(--green);border-color:var(--green)}
.chip[aria-pressed="true"]{color:var(--green);border-color:var(--green);background:rgba(59,255,165,.12)}
.search-list{margin-top:16px;border-top:1px solid var(--line)}
.search-list li{border-bottom:1px solid var(--line)}
.search-list a{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:11px 4px;font-size:14px;color:var(--bone);
}
.search-list a:hover{color:var(--green)}
.search-list a::after{content:"→";font-family:var(--font-mono);color:var(--line)}
.search-list a:hover::after{color:var(--green)}

/* 滚动收拢 */
@media (min-width:901px){
  .site-header[data-compact="true"] .nav-dock{
    height:44px;top:10px;background:var(--indigo-deep);
  }
}

/* ------------------------------------------------ 页脚 */
.site-footer{
  position:relative;
  margin-top:96px;
  padding-left:var(--rail-w);
  background:var(--indigo-deep);
  border-top:1px solid var(--line);
}
.footer-accent{
  height:8px;
  background:linear-gradient(90deg,var(--green) 0 46%,var(--blue) 46% 72%,var(--wine) 72% 88%,var(--orange) 88% 100%);
  clip-path:polygon(0 0,100% 0,100% 36%,0 100%);
}
.footer-grid{
  display:grid;grid-template-columns:1.4fr .9fr .9fr 1.25fr;
  gap:32px;padding:52px 0 44px;
}
.footer-col{min-width:0}
.footer-brand{display:flex;align-items:center;gap:11px;color:var(--bone)}
.footer-brand:hover{color:var(--bone)}
.footer-title{
  margin:0 0 15px;
  font-family:var(--font-mono);font-size:11px;font-weight:500;
  letter-spacing:.14em;color:var(--muted);
}
.footer-list li{margin-bottom:10px}
.footer-list li:last-child{margin-bottom:0}
.footer-list a{font-size:14.5px;color:var(--bone)}
.footer-list a:hover{color:var(--green)}
.footer-list--contact li{display:flex;flex-wrap:wrap;gap:4px;margin-bottom:12px}
.footer-note{margin-top:16px;font-size:13px;line-height:1.7;color:var(--muted)}
.footer-legal{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px 24px;
  padding:22px 0 30px;border-top:1px solid var(--line);
}
.footer-copy{margin:0;font-size:13px;color:var(--muted)}
.footer-legal__links{display:flex;flex-wrap:wrap;gap:18px}
.footer-legal__links a{font-size:13px;color:var(--muted)}
.footer-legal__links a:hover{color:var(--green)}
.footer-icp{margin:0;font-family:var(--font-mono);font-size:12px;letter-spacing:.04em;color:var(--muted)}

/* ------------------------------------------------ 通用组件 */
.section-head{
  display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:20px;
  padding-bottom:18px;margin-bottom:32px;
  border-bottom:1px solid var(--line);
}
.section-head h2,.section-head h3{font-size:28px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  margin-bottom:14px;
  font-family:var(--font-mono);font-size:12px;font-weight:500;
  letter-spacing:.14em;color:var(--green);
}
.eyebrow::before{content:"";width:18px;height:1px;background:var(--green)}

.card{
  position:relative;
  padding:22px;
  background:var(--indigo);
  border:1px solid var(--line);border-radius:2px;
  transition:transform .18s var(--ease),border-color .18s var(--ease),background .18s var(--ease);
}
.card:hover{transform:translateY(-2px);border-color:#3D4C70}
.card--teal{background:var(--teal)}
.card--wine{background:var(--wine)}
.card__title{margin:0 0 10px;font-size:20px;font-weight:800}

.btn{
  display:inline-flex;align-items:center;gap:8px;
  height:44px;padding:0 20px;
  border:1px solid var(--line);border-radius:2px;
  font-size:15px;font-weight:700;color:var(--bone);background:transparent;
  transition:color .16s var(--ease),background .16s var(--ease),border-color .16s var(--ease),transform .16s var(--ease);
}
.btn:hover{transform:translateY(-1px)}
.btn--primary{background:var(--green);border-color:var(--green);color:var(--ink)}
.btn--primary:hover{background:#66FFBB;border-color:#66FFBB;color:var(--ink)}
.btn--ghost:hover{border-color:var(--green);color:var(--green)}
.btn--recall{color:var(--orange);border-color:rgba(255,138,61,.45);background:rgba(255,138,61,.08)}
.btn--recall:hover{color:#FFB27A;border-color:var(--orange)}

.breadcrumbs{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  margin:0 0 24px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--muted);
}
.breadcrumbs li{display:inline-flex;align-items:center}
.breadcrumbs li::after{content:"/";margin-left:8px;color:var(--line)}
.breadcrumbs li:last-child::after{content:"";margin:0}
.breadcrumbs a{color:var(--muted)}
.breadcrumbs a:hover{color:var(--green)}
.breadcrumbs [aria-current="page"]{color:var(--bone)}

.data-label{
  display:inline-block;min-width:46px;margin-right:8px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;color:var(--muted);
}
.data-value{
  font-family:var(--font-mono);font-size:13.5px;letter-spacing:.02em;color:var(--yellow);
  word-break:break-word;
}

.frame{
  position:relative;display:block;overflow:hidden;
  background:var(--indigo-deep);
  border:1px solid var(--line);border-radius:2px;
}
.frame>img{width:100%;height:100%;object-fit:cover}
.frame--16x9{aspect-ratio:16/9}
.frame--4x3{aspect-ratio:4/3}
.frame--1x1{aspect-ratio:1/1}
.frame--21x9{aspect-ratio:21/9}
.frame--tilt{clip-path:polygon(0 0,100% 0,100% 94%,0 100%)}
.frame__caption{
  position:absolute;left:0;right:0;bottom:0;
  padding:10px 12px;background:rgba(7,10,15,.84);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--bone);
}

.slab{position:relative;background:var(--indigo);border:1px solid var(--line)}
.slab--tilt{clip-path:polygon(0 0,100% 0,100% 92%,0 100%)}

.to-top{
  position:fixed;right:24px;bottom:24px;z-index:76;
  display:grid;place-items:center;
  width:44px;height:44px;
  background:var(--indigo);border:1px solid var(--line);border-radius:2px;color:var(--bone);
  opacity:0;visibility:hidden;
  transition:opacity .18s var(--ease),visibility .18s var(--ease),color .16s var(--ease),border-color .16s var(--ease);
}
.to-top[data-visible="true"]{opacity:1;visibility:visible}
.to-top:hover{color:var(--green);border-color:var(--green)}

/* ------------------------------------------------ 响应式 */
@media (max-width:1200px){
  .nav-dock{left:calc(var(--rail-w) + 16px);right:16px;padding:0 8px 0 12px}
  .nav__list a{padding:0 10px;font-size:13px}
  .nav__list a::after{left:10px;right:10px}
  .dock-cta{padding:0 13px;font-size:13px}
  .footer-grid{grid-template-columns:1.3fr 1fr 1fr 1.2fr;gap:26px}
}

@media (max-width:1000px){
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px}
}

@media (max-width:900px){
  #main-content{padding-left:0;padding-top:78px}
  .site-header{
    position:fixed;top:0;left:0;right:0;z-index:90;
    background:var(--indigo);
    border-bottom:1px solid var(--line);
    box-shadow:0 12px 32px rgba(0,0,0,.45);
  }
  .brand-rail{
    position:static;width:auto;height:58px;
    flex-direction:row;align-items:center;gap:12px;
    padding:0 112px 0 14px;
    border-right:0;background:transparent;
  }
  .brand__mark{flex:0 0 32px;width:32px;height:32px;font-size:17px}
  .brand__name{font-size:16px}
  .brand__tagline{font-size:10px;margin-top:3px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
  .rail-links,.rail-note{display:none}

  .nav-dock{
    position:static;top:auto;left:auto;right:auto;height:auto;
    display:block;padding:0;border:0;border-radius:0;background:transparent;
  }
  .nav-toggle{display:inline-flex;position:absolute;top:10px;right:12px;z-index:2}
  .search-toggle{position:absolute;top:10px;right:60px;z-index:2}
  .nav{
    display:none;
    padding:4px 12px 12px;
    border-top:1px solid var(--line);
    overflow:visible;
  }
  .nav[data-open]{display:block}
  .nav__list{flex-direction:column;align-items:stretch;gap:2px}
  .nav__list a{
    height:44px;padding:0 12px;border-radius:2px;
    font-size:15px;background:rgba(234,240,246,.03);
  }
  .nav__list a::after{display:none}
  .nav__list a[aria-current="page"]{box-shadow:inset 3px 0 0 var(--green),inset 0 0 0 1px rgba(59,255,165,.3)}
  .dock-cta{display:none}
  .nav[data-open]~.dock-cta{display:inline-flex;height:42px;margin:0 12px 14px;padding:0 18px}
  .search-panel{
    position:static;width:auto;margin:0 12px 14px;
    box-shadow:none;
  }
  .site-footer{padding-left:0;margin-top:72px}
  .section{padding:52px 0}
  .to-top{right:16px;bottom:16px}
}

@media (max-width:640px){
  h1{font-size:34px}
  h2{font-size:26px}
  h3{font-size:22px}
  h4{font-size:18px}
  .wrap{padding:0 18px}
  .brand__tagline{display:none}
  .section-head h2,.section-head h3{font-size:22px}
  .section-head{margin-bottom:24px}
  .grid--3,.grid--2{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding:40px 0 32px}
  .footer-legal{flex-direction:column;align-items:flex-start;gap:12px}
  .search-panel{width:auto}
  .chip{height:32px}
}

@media (max-width:380px){
  .wrap{padding:0 14px}
  .nav__list a{font-size:14px}
  .brand__name{font-size:15px}
  .brand-rail{padding-right:104px}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms!important;
    animation-iteration-count:1!important;
    transition-duration:.001ms!important;
  }
}