/* =========================================================
   KAIYUN 安装站 · 共享样式 /assets/site.css
   夜间球场数据终端 · 技术蓝图网格体系
   ========================================================= */

:root{
  --ink:#05100E;
  --panel:#0C1E1A;
  --turf:#12332B;
  --cyan:#00E5C0;
  --cyan-dim:#7DFFE4;
  --amber:#FF8A3C;
  --amber-mist:#FFD3B0;
  --paper:#EAF6F1;
  --body:#D6E7E1;
  --muted:#8CA9A1;
  --muted-deep:#6E948B;
  --line:#1B4A3F;
  --line-soft:rgba(27,74,63,.55);

  --shell:1240px;
  --gutter:clamp(18px,4vw,56px);
  --gap:clamp(16px,2vw,30px);
  --radius:2px;

  --dur:220ms;
  --ease:cubic-bezier(.22,.61,.36,1);

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

  --shadow-panel:0 1px 0 rgba(0,229,192,.06),0 14px 30px -24px rgba(0,0,0,.95);
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  min-height:100vh;
  background-color:var(--ink);
  background-image:
    repeating-linear-gradient(to right,rgba(27,74,63,.30) 0 1px,transparent 1px 96px),
    repeating-linear-gradient(to bottom,rgba(27,74,63,.20) 0 1px,transparent 1px 96px);
  color:var(--body);
  font-family:var(--font-sans);
  font-size:clamp(16px,0.35vw + 14.5px,17.5px);
  line-height:1.75;
  letter-spacing:.01em;
  overflow-x:hidden;
}
h1,h2,h3,h4,p,figure,blockquote{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
img,svg{max-width:100%;display:block;}
button{font:inherit;color:inherit;}
a{color:var(--cyan);text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:3px;}
a:hover{color:var(--cyan-dim);}
table{border-collapse:collapse;width:100%;}
hr{border:0;border-top:1px solid var(--line);margin:0;}

#main-content{display:block;outline:none;}

/* ---------- 可访问性 ---------- */
.skip-link{
  position:absolute;left:16px;top:-72px;z-index:200;
  padding:10px 18px;
  background:var(--cyan);color:#03110D;
  font-size:14px;font-weight:700;letter-spacing:.04em;
  text-decoration:none;
  border-radius:var(--radius);
  transition:top 160ms var(--ease);
}
.skip-link:focus{top:14px;color:#03110D;}

:focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:2px;
  border-radius:1px;
}

/* ---------- 布局 ---------- */
.shell{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.grid12{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:var(--gap);
}
.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-9{grid-column:span 9;}
.span-10{grid-column:span 10;}
.span-12{grid-column:span 12;}

.prose{
  max-width:34em;
  font-size:clamp(16px,0.3vw + 14.6px,17.5px);
  line-height:1.85;
  color:var(--body);
}
.prose p{margin:0 0 1.15em;}
.prose p:last-child{margin-bottom:0;}
.prose h2,.prose h3{
  color:var(--paper);
  font-family:var(--font-display);
  letter-spacing:-.01em;
  line-height:1.35;
  margin:1.6em 0 .6em;
}
.prose h2{font-size:clamp(20px,1.4vw,25px);font-weight:800;}
.prose h3{font-size:clamp(17px,1vw,20px);font-weight:700;}
.prose strong{color:var(--paper);font-weight:700;}
.prose ul,.prose ol{margin:0 0 1.15em;padding-left:1.2em;}
.prose li{margin-bottom:.5em;}
.prose ul li{list-style:none;position:relative;}
.prose ul li::before{
  content:"";
  position:absolute;left:-1.1em;top:.75em;
  width:8px;height:1px;background:var(--cyan);
}
.prose ol{list-style:decimal;}
.prose ol li::marker{color:var(--cyan);font-family:var(--font-mono);}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:10px 18px;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:transparent;
  color:var(--paper);
  font-family:var(--font-sans);
  font-size:14px;
  font-weight:600;
  letter-spacing:.06em;
  line-height:1.2;
  text-decoration:none;
  cursor:pointer;
  transition:
    background-color var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    color var(--dur) var(--ease),
    transform var(--dur) var(--ease);
}
.btn:hover{
  border-color:var(--cyan);
  color:var(--cyan);
  transform:translateY(-2px);
}
.btn--accent{
  background:var(--amber);
  border-color:var(--amber);
  color:#201005;
}
.btn--accent:hover{
  background:var(--amber-mist);
  border-color:var(--amber-mist);
  color:#1B0D02;
}
.btn--line{background:rgba(18,51,43,.6);}
.btn--lg{padding:14px 26px;font-size:15px;}
.btn--wide{width:100%;}

/* ---------- 品牌标记 ---------- */
.brandmark{
  display:inline-flex;
  align-items:center;
  gap:12px;
  color:inherit;
  text-decoration:none;
}
.brandmark:hover{color:inherit;}
.brandmark__glyph{
  display:grid;
  place-items:center;
  width:38px;height:38px;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:linear-gradient(140deg,var(--turf),var(--panel));
  color:var(--cyan);
  font-family:var(--font-mono);
  font-size:17px;
  font-weight:700;
  line-height:1;
  box-shadow:inset 0 0 0 1px rgba(0,229,192,.08);
  transition:border-color var(--dur) var(--ease),color var(--dur) var(--ease);
}
.brandmark:hover .brandmark__glyph{border-color:var(--cyan);}
.brandmark__text{display:block;}
.brandmark__line{
  display:block;
  font-family:var(--font-display);
  font-size:clamp(17px,1.3vw,22px);
  font-weight:800;
  letter-spacing:-.02em;
  line-height:1.2;
  color:var(--paper);
}
.brandmark__sub{
  display:block;
  margin-top:2px;
  font-size:11px;
  letter-spacing:.18em;
  color:var(--muted);
}
.brandmark--footer .brandmark__glyph{width:44px;height:44px;font-size:19px;}

/* ---------- 头部 ---------- */
.masthead{
  position:sticky;
  top:0;
  z-index:60;
  background:linear-gradient(180deg,rgba(5,16,14,.97),rgba(5,16,14,.89));
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.masthead__frame{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding:clamp(12px,1.6vw,20px) var(--gutter) 0;
}
.masthead__top{
  display:grid;
  grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);
  align-items:center;
  gap:16px;
}
.masthead__stamp{
  margin:0;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.2em;
  color:var(--muted-deep);
  white-space:nowrap;
}
.masthead__brand{justify-self:center;min-width:0;}
.masthead__tools{
  justify-self:end;
  display:flex;
  align-items:center;
  gap:clamp(8px,1vw,14px);
}

/* 滚动进度 */
.scroll-progress{
  position:absolute;
  left:0;right:0;bottom:-1px;
  height:2px;
  background:rgba(27,74,63,.45);
  overflow:hidden;
}
.scroll-progress__bar{
  display:block;
  width:100%;height:100%;
  transform:scaleX(0);
  transform-origin:left center;
  background:linear-gradient(90deg,var(--cyan),var(--amber));
}

/* ---------- 导航 ---------- */
.nav-bar{
  margin-top:clamp(8px,1.2vw,16px);
  border-top:1px solid var(--line);
  overflow:hidden;
}
.nav-bar__inner{
  overflow-x:auto;
  overflow-y:hidden;
  scrollbar-width:none;
  -webkit-overflow-scrolling:touch;
}
.nav-bar__inner::-webkit-scrollbar{display:none;}
.nav-bar__list{
  display:flex;
  justify-content:center;
  align-items:stretch;
  gap:clamp(2px,2.2vw,34px);
  width:max-content;
  min-width:100%;
}
.nav-bar__item{flex:0 0 auto;}
.nav-bar__link{
  position:relative;
  display:inline-block;
  padding:14px 4px;
  color:var(--paper);
  font-size:15px;
  font-weight:500;
  letter-spacing:.08em;
  text-decoration:none;
  white-space:nowrap;
  transition:color var(--dur) var(--ease);
}
.nav-bar__link::after{
  content:"";
  position:absolute;
  left:4px;right:4px;bottom:8px;
  height:1px;
  background:var(--cyan);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform var(--dur) var(--ease);
}
.nav-bar__link:hover{color:var(--cyan-dim);}
.nav-bar__link:hover::after{transform:scaleX(1);}
.nav-bar__link[aria-current="page"]{color:var(--cyan);}
.nav-bar__link[aria-current="page"]::after{transform:scaleX(1);}

/* 移动导航按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:10px;
  padding:9px 14px;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:transparent;
  color:var(--paper);
  font-size:13px;
  letter-spacing:.16em;
  cursor:pointer;
  transition:border-color var(--dur) var(--ease),color var(--dur) var(--ease);
}
.nav-toggle:hover{border-color:var(--cyan);color:var(--cyan);}
.nav-toggle[aria-expanded="true"]{border-color:var(--amber);color:var(--amber-mist);}
.nav-toggle__box{
  display:inline-flex;
  flex-direction:column;
  justify-content:space-between;
  width:18px;height:12px;
}
.nav-toggle__bar{
  display:block;
  height:1.5px;
  background:currentColor;
  transition:transform var(--dur) var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1){transform:translateY(5.25px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2){transform:scaleX(.2);}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3){transform:translateY(-5.25px) rotate(-45deg);}
.nav-toggle__text{line-height:1;}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(48px,7vw,110px);
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,var(--panel),var(--ink) 72%);
}
.site-footer::before{
  content:"";
  position:absolute;
  top:-1px;left:0;right:0;
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(0,229,192,.55),transparent);
}
.site-footer__inner{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding:clamp(32px,5vw,64px) var(--gutter) clamp(22px,3vw,34px);
}
.footer-top{
  display:grid;
  grid-template-columns:minmax(220px,1fr) minmax(0,2fr);
  gap:clamp(24px,4vw,64px);
}
.footer-brand__note{
  margin-top:14px;
  max-width:22em;
  font-size:14px;
  line-height:1.7;
  color:var(--muted);
}
.footer-cols{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(18px,3vw,40px);
}
.footer-col__title{
  margin:0 0 14px;
  padding-bottom:8px;
  border-bottom:1px solid var(--line);
  font-size:12px;
  font-weight:700;
  letter-spacing:.24em;
  color:var(--cyan);
}
.footer-list{
  display:flex;
  flex-direction:column;
  gap:10px;
}
.footer-list__item{
  font-size:14.5px;
  line-height:1.65;
  color:var(--muted);
  word-break:break-word;
}
.footer-list__link{
  color:var(--muted);
  text-decoration:none;
  transition:color var(--dur) var(--ease);
}
.footer-list__link:hover{color:var(--cyan);}
.footer-list__link[aria-current="page"]{color:var(--cyan);}
.footer-list__key{
  display:block;
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.2em;
  color:var(--muted-deep);
}
.footer-legal{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  gap:6px 24px;
  margin-top:clamp(28px,4vw,56px);
  padding-top:clamp(16px,2.4vw,26px);
  border-top:1px solid var(--line);
  font-size:13px;
  color:var(--muted);
}
.footer-legal__icp{
  font-family:var(--font-mono);
  letter-spacing:.04em;
  color:var(--muted);
}
.footer-legal__icp::before{
  content:"";
  display:inline-block;
  width:6px;height:6px;
  margin-right:9px;
  background:var(--cyan);
  vertical-align:middle;
}
.footer-legal__copy{margin-left:auto;}
.footer-legal__note{
  flex:1 1 100%;
  font-size:12.5px;
  line-height:1.7;
  color:var(--muted-deep);
}

/* ---------- 通用组件 ---------- */
.section-band{
  display:flex;
  align-items:center;
  gap:14px;
  margin:clamp(36px,5.5vw,76px) 0;
  padding:12px 0;
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.section-band__no{
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.18em;
  color:var(--cyan);
}
.section-band__title{
  margin:0;
  font-size:14px;
  font-weight:600;
  letter-spacing:.2em;
  color:var(--paper);
  white-space:nowrap;
}
.section-band__rule{
  flex:1;
  height:1px;
  background-image:repeating-linear-gradient(90deg,var(--line) 0 6px,transparent 6px 14px);
}

.panel{
  display:flex;
  flex-direction:column;
  padding:clamp(18px,2.4vw,28px);
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:linear-gradient(180deg,var(--panel),rgba(12,30,26,.55));
  box-shadow:var(--shadow-panel);
  transition:transform var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.panel:hover{transform:translateY(-2px);border-color:var(--cyan);}
.panel--quiet:hover{transform:none;border-color:var(--line);}
.panel__index{
  display:block;
  margin-bottom:12px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.22em;
  color:var(--cyan);
}
.panel__title{
  margin:0 0 10px;
  font-family:var(--font-display);
  font-size:clamp(18px,1.5vw,22px);
  font-weight:800;
  letter-spacing:-.015em;
  line-height:1.35;
  color:var(--paper);
}
.panel__meta{
  margin:0;
  font-size:14px;
  line-height:1.7;
  color:var(--muted);
}

.stat{display:flex;flex-direction:column;gap:6px;}
.stat__num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-size:clamp(28px,4vw,46px);
  font-weight:700;
  line-height:1;
  letter-spacing:-.02em;
  color:var(--cyan);
}
.stat__label{
  font-size:11.5px;
  letter-spacing:.22em;
  color:var(--muted-deep);
}

.num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:-.01em;
}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:3px 11px;
  border:1px solid var(--line);
  border-radius:999px;
  font-size:12px;
  letter-spacing:.08em;
  color:var(--cyan-dim);
}
.tag--live{
  border-color:rgba(255,138,60,.7);
  background:rgba(255,138,60,.12);
  color:var(--amber-mist);
}

.media-frame{
  position:relative;
  display:block;
  overflow:hidden;
  aspect-ratio:16 / 9;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:linear-gradient(135deg,var(--turf),var(--ink) 62%),var(--panel);
}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background-image:
    repeating-linear-gradient(0deg,rgba(0,229,192,.07) 0 1px,transparent 1px 32px),
    repeating-linear-gradient(90deg,rgba(0,229,192,.07) 0 1px,transparent 1px 32px);
}
.media-frame img{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  object-fit:cover;
}
.media-frame--4x3{aspect-ratio:4 / 3;}
.media-frame--1x1{aspect-ratio:1 / 1;}
.media-frame--21x9{aspect-ratio:21 / 9;}
.media-frame--tall{aspect-ratio:3 / 4;}
.media-frame__cap{
  position:absolute;
  left:0;right:0;bottom:0;
  z-index:2;
  padding:8px 12px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  color:var(--paper);
  background:linear-gradient(90deg,rgba(5,16,14,.92),rgba(5,16,14,0));
}

.annotation{
  font-size:11px;
  letter-spacing:.24em;
  color:var(--muted-deep);
  text-transform:uppercase;
}
.annotation--vertical{
  writing-mode:vertical-rl;
  text-orientation:mixed;
  letter-spacing:.3em;
}

.slash{
  height:clamp(36px,5vw,84px);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
  background-image:repeating-linear-gradient(115deg,var(--turf) 0 12px,transparent 12px 38px);
}

/* ---------- 面包屑 ---------- */
.breadcrumb{padding:clamp(14px,2vw,22px) 0;}
.breadcrumb__list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:0 8px;
  font-size:13px;
  color:var(--muted);
}
.breadcrumb__list > li + li::before{
  content:"/";
  margin-right:8px;
  color:var(--line);
}
.breadcrumb__link{
  color:var(--muted);
  text-decoration:none;
  transition:color var(--dur) var(--ease);
}
.breadcrumb__link:hover{color:var(--cyan);}
.breadcrumb__current{color:var(--paper);}

/* ---------- 显现 ---------- */
.has-js [data-reveal]{
  opacity:0;
  transform:translateY(10px);
}
.has-js [data-reveal].is-visible{
  opacity:1;
  transform:none;
  transition:opacity 420ms var(--ease),transform 420ms var(--ease);
}

/* ---------- 响应式 ---------- */
@media (max-width:1100px){
  .footer-top{grid-template-columns:1fr;}
  .footer-brand__note{max-width:34em;}
}

@media (max-width:980px){
  .span-3,.span-4,.span-5{grid-column:span 6;}
  .span-7,.span-8,.span-9,.span-10{grid-column:span 12;}
}

@media (max-width:860px){
  .masthead__top{
    grid-template-columns:minmax(0,1fr) auto;
    gap:12px;
  }
  .masthead__stamp{display:none;}
  .masthead__brand{justify-self:start;}
  .masthead__tools{justify-self:end;}
  .nav-toggle{display:inline-flex;}
  .masthead__tools .btn{padding:9px 13px;font-size:13px;letter-spacing:.04em;}

  .nav-bar{
    max-height:0;
    opacity:0;
    transition:max-height var(--dur) var(--ease),opacity 160ms var(--ease);
  }
  .nav-bar[data-open="true"]{
    max-height:70vh;
    opacity:1;
    overflow-y:auto;
  }
  .nav-bar__inner{overflow-x:visible;}
  .nav-bar__list{
    width:auto;
    min-width:0;
    flex-direction:column;
    align-items:stretch;
    gap:0;
  }
  .nav-bar__item{flex:1 1 auto;}
  .nav-bar__link{
    display:block;
    padding:14px 2px;
    border-bottom:1px solid var(--line-soft);
    font-size:16px;
    letter-spacing:.06em;
  }
  .nav-bar__link::after{display:none;}
  .nav-bar__link[aria-current="page"]{
    color:var(--cyan);
    background:linear-gradient(90deg,rgba(0,229,192,.09),transparent 70%);
  }

  .footer-cols{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-legal__copy{margin-left:0;}
}

@media (max-width:640px){
  body{font-size:16px;}
  .span-3,.span-4,.span-5,.span-6,.span-7,.span-8,.span-9,.span-10{grid-column:span 12;}
  .section-band{gap:10px;}
  .section-band__title{font-size:12.5px;letter-spacing:.14em;}
  .footer-cols{grid-template-columns:1fr;gap:24px;}
  .brandmark__sub{letter-spacing:.14em;}
}

@media (max-width:380px){
  .masthead__tools .btn{display:none;}
}

/* ---------- 降低动效 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    transition-delay:0ms !important;
  }
  .has-js [data-reveal]{opacity:1;transform:none;}
  .panel:hover,.btn:hover{transform:none;}
}