/* ==========================================================================
   KAIYUN赛场 · 共享外壳样式表  /assets/site.css
   深空黑赛道底 + 悬浮胶囊导航 + 8° 切角 + 等宽数据体系
   ========================================================================== */

/* ---------- 1 · Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,h6,p,ul,ol,li,figure,blockquote,dl,dt,dd{margin:0;padding:0}
ul,ol{list-style:none}
img,svg,video{display:block;max-width:100%;height:auto}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
a{color:inherit;text-decoration:none}
table{border-collapse:collapse;width:100%}
::selection{background:var(--neon);color:#0A1200}
:focus-visible{outline:2px solid var(--neon);outline-offset:3px;border-radius:4px}

/* ---------- 2 · Tokens ---------- */
:root{
  --ink:#05070A;
  --panel:#0E141C;
  --panel-2:#121A24;
  --line:#2A3441;
  --neon:#C8FF3D;
  --neon-dim:#8FBF22;
  --blue:#3FA9FF;
  --orange:#FF7A2F;
  --white:#EAF0F6;
  --mist:#9AA7B4;
  --neon-soft:rgba(200,255,61,.12);
  --blue-soft:rgba(63,169,255,.12);
  --orange-soft:rgba(255,122,47,.14);
  --angle:8deg;
  --shell:1280px;
  --shell-wide:1560px;
  --gutter:clamp(16px,4vw,48px);
  --radius:14px;
  --rail-h:64px;
  --font-sans:"Noto Sans SC","HarmonyOS Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-mono:"JetBrains Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}

/* ---------- 3 · Base & 中文排版 ---------- */
body{
  position:relative;
  min-height:100vh;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  font-weight:400;
  color:var(--white);
  background-color:var(--ink);
  background-image:
    linear-gradient(rgba(42,52,65,.20) 1px,transparent 1px),
    linear-gradient(90deg,rgba(42,52,65,.20) 1px,transparent 1px);
  background-size:120px 120px;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background:
    radial-gradient(62vw 52vh at 88% -12%,rgba(200,255,61,.10),transparent 72%),
    radial-gradient(52vw 44vh at 4% 18%,rgba(63,169,255,.08),transparent 72%);
}
main{position:relative;z-index:1;display:block}
p{max-width:68ch}
p + p{margin-top:.9em}
strong{font-weight:700;color:var(--white)}
a{transition:color .22s ease,background-color .22s ease,border-color .22s ease}

/* ---------- 4 · 布局壳 ---------- */
.container{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:var(--gutter)}
.container--wide{max-width:var(--shell-wide)}

.grid-12{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:clamp(16px,2vw,28px)}
.col-3{grid-column:span 3}
.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}

.rule-slant{
  display:block;
  height:1px;
  border:0;
  background:linear-gradient(90deg,transparent,var(--line) 14%,var(--line) 86%,transparent);
  transform:skewY(-1.6deg);
}

/* ---------- 5 · 排版组件 ---------- */
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:.7em;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--neon);
}
.eyebrow::before{content:"";width:26px;height:1px;background:var(--neon);flex:none}

.display-title{
  font-size:clamp(56px,8vw,112px);
  font-weight:800;
  line-height:.95;
  letter-spacing:-.02em;
}
.section-title{
  font-size:clamp(28px,3.4vw,44px);
  font-weight:800;
  line-height:1.12;
  letter-spacing:-.02em;
}
.section-index{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--mist);
}
.lead{font-size:clamp(17px,1.4vw,20px);color:var(--mist);line-height:1.7}
.muted{color:var(--mist)}

/* ---------- 6 · 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.5em;
  padding:.62em 1.15em;
  border-radius:999px;
  border:1px solid var(--line);
  background:rgba(14,20,28,.9);
  color:var(--white);
  font-size:14px;
  font-weight:700;
  letter-spacing:.02em;
  white-space:nowrap;
  transition:background-color .22s ease,color .22s ease,border-color .22s ease,transform .22s ease;
}
.btn:hover{background:var(--panel-2);border-color:rgba(200,255,61,.45)}
.btn:active{transform:translateY(1px)}
.btn--primary{background:var(--neon);border-color:var(--neon);color:#0A1200}
.btn--primary:hover{background:var(--neon-dim);border-color:var(--neon-dim);color:#0A1200}
.btn--ghost{background:transparent;border-color:rgba(200,255,61,.4);color:var(--neon)}
.btn--ghost:hover{background:var(--neon-soft)}

/* ---------- 7 · 通用标签与数据 ---------- */
.cap{
  display:inline-flex;
  align-items:center;
  gap:.42em;
  padding:.4em .85em;
  border-radius:999px;
  border:1px solid var(--line);
  background:rgba(14,20,28,.72);
  color:var(--mist);
  font-size:13px;
  letter-spacing:.02em;
  white-space:nowrap;
  transition:color .22s ease,background-color .22s ease,border-color .22s ease;
}
.cap:hover,.cap:focus-visible{color:var(--white);border-color:rgba(200,255,61,.5);background:var(--neon-soft)}
.cap--quick{font-weight:600}
.cap.is-active{color:#0A1200;background:var(--neon);border-color:var(--neon)}
.cap--blue{color:var(--blue);border-color:rgba(63,169,255,.4);background:var(--blue-soft)}

.tag{
  display:inline-flex;
  align-items:center;
  gap:.4em;
  padding:.18em .6em;
  border-radius:4px;
  border:1px solid var(--line);
  color:var(--mist);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  white-space:nowrap;
}
.tag--live{color:var(--orange);border-color:rgba(255,122,47,.45);background:var(--orange-soft)}
.tag--data{color:var(--blue);border-color:rgba(63,169,255,.4);background:var(--blue-soft)}
.tag--key{color:var(--neon);border-color:rgba(200,255,61,.4);background:var(--neon-soft)}

.data{font-family:var(--font-mono);font-size:14px;letter-spacing:.02em;color:var(--white);font-variant-numeric:tabular-nums}
.data--lg{font-size:20px}
.data-unit{margin-left:.18em;font-size:.78em;color:var(--mist)}

/* ---------- 8 · 面板 / 切角 / 图片容器 ---------- */
.panel{
  position:relative;
  padding:clamp(18px,2.4vw,28px);
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:linear-gradient(180deg,var(--panel),rgba(14,20,28,.55));
}
.panel--cut{
  border-radius:0;
  clip-path:polygon(0 0,calc(100% - 26px) 0,100% 26px,100% 100%,0 100%);
}
.panel--soft{background:var(--neon-soft);border-color:rgba(200,255,61,.3)}

.media-frame{
  position:relative;
  overflow:hidden;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:var(--panel);
}
.media-frame__img{
  width:100%;
  height:100%;
  object-fit:cover;
  aspect-ratio:16/9;
}
.media-frame--wide .media-frame__img{aspect-ratio:16/9}
.media-frame--tall .media-frame__img{aspect-ratio:4/5}
.media-frame--square .media-frame__img{aspect-ratio:1/1}
.media-frame--ultra .media-frame__img{aspect-ratio:21/9}
.media-frame--cut{border-radius:0;clip-path:polygon(0 0,100% 0,100% calc(100% - 30px),calc(100% - 30px) 100%,0 100%)}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:linear-gradient(180deg,rgba(5,7,10,0) 46%,rgba(5,7,10,.72) 100%);
}
.media-frame__tag{
  position:absolute;
  left:14px;
  bottom:14px;
  z-index:2;
  display:inline-flex;
  align-items:center;
  gap:.4em;
  padding:.24em .7em;
  border-radius:4px;
  background:rgba(5,7,10,.78);
  border:1px solid rgba(200,255,61,.35);
  color:var(--neon);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
}

/* ---------- 9 · 面包屑 ---------- */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:.6em;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--mist);
}
.breadcrumb__link{color:var(--mist)}
.breadcrumb__link:hover{color:var(--neon)}
.breadcrumb__sep{color:var(--line)}
.breadcrumb__current{color:var(--white)}

/* ---------- 10 · 滚动协议 ---------- */
.read-progress{
  position:fixed;
  top:0;
  left:0;
  right:0;
  height:2px;
  z-index:120;
  background:rgba(42,52,65,.55);
  pointer-events:none;
}
.read-progress__bar{
  display:block;
  width:100%;
  height:100%;
  transform:scaleX(var(--progress,0));
  transform-origin:0 50%;
  background:linear-gradient(90deg,var(--neon-dim),var(--neon));
  box-shadow:0 0 12px rgba(200,255,61,.55);
}
[data-observe]{transition:color .32s ease,opacity .32s ease}
.observe-mark{
  display:block;
  width:2px;
  min-height:36px;
  height:100%;
  border-radius:2px;
  background:var(--line);
  transition:background-color .32s ease,box-shadow .32s ease;
}
[data-observe].is-current .observe-mark{
  background:var(--neon);
  box-shadow:0 0 14px rgba(200,255,61,.55);
}
[data-reveal]{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .32s ease,transform .32s ease;
}
[data-reveal].is-visible{opacity:1;transform:none}

/* ---------- 11 · 头部：悬浮胶囊导航 ---------- */
.skip-link{
  position:fixed;
  left:50%;
  top:-120px;
  z-index:200;
  transform:translateX(-50%);
  padding:.7em 1.2em;
  border-radius:0 0 12px 12px;
  background:var(--neon);
  color:#0A1200;
  font-size:14px;
  font-weight:700;
  transition:top .22s ease;
}
.skip-link:focus{top:0}

.site-header{
  position:sticky;
  top:0;
  z-index:100;
  padding:10px clamp(10px,1.6vw,22px) 0;
  background:linear-gradient(180deg,rgba(5,7,10,.94) 0%,rgba(5,7,10,.72) 62%,rgba(5,7,10,0) 100%);
}

.header-rail{
  position:relative;
  display:flex;
  align-items:center;
  gap:clamp(10px,1.6vw,26px);
  width:100%;
  max-width:var(--shell-wide);
  min-height:var(--rail-h);
  margin:0 auto;
  padding:8px 10px 8px 18px;
  border:1px solid rgba(42,52,65,.9);
  border-radius:999px;
  background:linear-gradient(180deg,rgba(14,20,28,.95),rgba(5,7,10,.9));
  box-shadow:0 26px 50px -36px rgba(0,0,0,.95),inset 0 1px 0 rgba(234,240,246,.05);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
}
.header-rail::before{
  content:"";
  position:absolute;
  top:0;
  left:26px;
  width:84px;
  height:2px;
  border-radius:2px;
  background:var(--neon);
  box-shadow:0 0 12px rgba(200,255,61,.7);
}

.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;color:var(--white)}
.brand__mark{
  display:grid;
  place-items:center;
  width:38px;
  height:38px;
  flex:none;
  border-radius:12px;
  border:1px solid rgba(200,255,61,.35);
  background:var(--neon-soft);
  color:var(--neon);
}
.brand__text{display:flex;flex-direction:column;line-height:1.15;min-width:0}
.brand__name{font-size:16px;font-weight:800;letter-spacing:.02em}
.brand__tagline{font-size:11px;letter-spacing:.14em;color:var(--mist);white-space:nowrap}
.brand--footer .brand__name{font-size:18px}

.header-shortcuts{display:flex;align-items:center;gap:6px;margin-left:clamp(6px,1.4vw,22px)}

.header-tools{display:flex;align-items:center;gap:8px;margin-left:auto}

.league-switch{
  display:flex;
  align-items:center;
  gap:3px;
  padding:4px;
  border:1px solid var(--line);
  border-radius:999px;
  background:rgba(5,7,10,.65);
}
.league-switch__btn{
  padding:.3em .8em;
  border-radius:999px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--mist);
  transition:background-color .22s ease,color .22s ease;
}
.league-switch__btn:hover{color:var(--white);background:var(--neon-soft)}
.league-switch__btn.is-active{background:var(--neon);color:#0A1200;font-weight:700}

.tool-link{
  display:inline-flex;
  align-items:center;
  gap:.4em;
  padding:.42em .8em;
  border:1px solid transparent;
  border-radius:999px;
  color:var(--mist);
  font-size:13px;
}
.tool-link:hover{color:var(--white);background:var(--blue-soft);border-color:rgba(63,169,255,.32)}
.tool-link__icon{display:inline-flex;color:var(--blue)}
.tool-link__text{white-space:nowrap}

.nav-toggle{
  display:none;
  align-items:center;
  gap:8px;
  padding:.42em .85em;
  border:1px solid var(--line);
  border-radius:999px;
  background:rgba(5,7,10,.7);
  color:var(--white);
  font-size:13px;
  font-weight:600;
}
.nav-toggle:hover{border-color:rgba(200,255,61,.45)}
.nav-toggle__label{white-space:nowrap}
.nav-toggle__bars{display:inline-flex;flex-direction:column;justify-content:center;gap:3px;width:16px;height:14px}
.nav-toggle__bars i{display:block;height:2px;border-radius:2px;background:currentColor;transition:transform .22s ease,opacity .22s ease}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(1){transform:translateY(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(-5px) rotate(-45deg)}

.site-nav{max-width:var(--shell-wide);margin:8px auto 0}
.site-nav__list{
  display:flex;
  flex-wrap:wrap;
  gap:4px;
  width:max-content;
  max-width:100%;
  padding:5px;
  border:1px solid rgba(42,52,65,.8);
  border-radius:999px;
  background:rgba(14,20,28,.74);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
}
.site-nav__item{display:block}
.site-nav__link{
  display:block;
  padding:.42em 1.05em;
  border-radius:999px;
  font-size:14px;
  letter-spacing:.02em;
  color:var(--mist);
  white-space:nowrap;
  transition:color .22s ease,background-color .22s ease;
}
.site-nav__link:hover,.site-nav__link:focus-visible{color:var(--white);background:var(--neon-soft)}
.site-nav__link[aria-current="page"]{color:#0A1200;background:var(--neon);font-weight:700}

/* ---------- 12 · 页脚 ---------- */
.site-footer{
  position:relative;
  z-index:1;
  margin-top:clamp(56px,8vw,120px);
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(14,20,28,0) 0%,rgba(14,20,28,.92) 22%,rgba(5,7,10,1) 100%);
}
.site-footer::before{
  content:"";
  position:absolute;
  top:-1px;
  left:0;
  width:clamp(120px,24vw,340px);
  height:2px;
  background:linear-gradient(90deg,var(--neon),rgba(200,255,61,0));
}
.footer-shell{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding:clamp(40px,6vw,72px) var(--gutter) 28px;
}
.footer-top{
  display:grid;
  grid-template-columns:minmax(220px,1.35fr) repeat(3,minmax(140px,1fr));
  gap:clamp(24px,4vw,56px);
}
.footer-brand{display:flex;flex-direction:column;gap:14px}
.footer-note{font-size:13px;color:var(--mist);max-width:32ch;letter-spacing:.02em}
.footer-note--muted{color:rgba(154,167,180,.75)}

.footer-col{display:flex;flex-direction:column;gap:14px}
.footer-col__title{
  position:relative;
  font-size:13px;
  font-weight:800;
  letter-spacing:.16em;
  color:var(--white);
  padding-left:14px;
}
.footer-col__title::before{
  content:"";
  position:absolute;
  left:0;
  top:.15em;
  bottom:.15em;
  width:2px;
  border-radius:2px;
  background:var(--neon);
}
.footer-col__list{display:flex;flex-direction:column;gap:9px}
.footer-col__item{display:block}
.footer-col__link{font-size:14px;color:var(--mist);word-break:break-word}
.footer-col__link:hover,.footer-col__link:focus-visible{color:var(--neon)}
.footer-col__text{font-size:14px;color:var(--mist);word-break:break-all}

.footer-meta{
  display:grid;
  grid-template-columns:auto 1fr;
  align-items:start;
  gap:12px clamp(20px,4vw,44px);
  margin-top:clamp(30px,4.5vw,56px);
  padding-top:22px;
  border-top:1px solid var(--line);
}
.footer-legal__list{display:flex;flex-wrap:wrap;gap:10px 20px}
.footer-legal__item{display:block}
.footer-legal__link{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.14em;
  color:var(--mist);
}
.footer-legal__link:hover,.footer-legal__link:focus-visible{color:var(--blue)}
.footer-meta__line{font-size:13px;color:var(--mist);max-width:70ch}

.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px 24px;
  margin-top:22px;
  padding-top:18px;
  border-top:1px dashed rgba(42,52,65,.8);
}
.footer-copy,.footer-icp{font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;color:rgba(154,167,180,.85)}

/* ---------- 13 · 响应式 ---------- */
@media (max-width:1180px){
  .league-switch{display:none}
}

@media (max-width:980px){
  :root{--rail-h:58px}
  .header-shortcuts{display:none}
  .nav-toggle{display:inline-flex}
  .site-nav{display:none}
  .site-nav[data-open]{display:block}
  .site-nav__list{
    width:100%;
    flex-direction:column;
    gap:2px;
    padding:10px;
    border-radius:20px;
    background:rgba(14,20,28,.96);
  }
  .site-nav__link{padding:.7em 1em;border-radius:12px;font-size:15px}
  .footer-top{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-meta{grid-template-columns:1fr}
}

@media (max-width:640px){
  .brand__tagline{display:none}
  .tool-link__text{display:none}
  .btn--primary{padding:.55em .95em;font-size:13px}
  .header-rail{gap:8px;padding:8px 10px 8px 14px}
  .brand__mark{width:34px;height:34px}
  .grid-12{grid-template-columns:repeat(6,minmax(0,1fr))}
  .col-3,.col-4,.col-5,.col-6,.col-7,.col-8{grid-column:span 6}
  .footer-top{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}

/* ---------- 14 · 无障碍与减弱动效 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms!important;
    animation-iteration-count:1!important;
    transition-duration:.001ms!important;
  }
  [data-reveal]{opacity:1!important;transform:none!important}
  .read-progress__bar{box-shadow:none}
}