/* ==========================================================================
   乐竟赛场 · /assets/site.css
   夜色作战室 · 粗野主义数据外壳
   ========================================================================== */

:root{
  --night:#05100C;
  --deep:#0A1D17;
  --panel:#102A22;
  --line:#1E4C3E;
  --neon:#35F0C0;
  --teal:#17A98A;
  --alert:#FF6A45;
  --amber:#FFC24A;
  --violet:#7C6BFF;
  --text:#E9FBF4;
  --muted:#8FB6AA;
  --shadow:#020705;

  --font-display:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-body:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --edge:2px;
  --gutter:clamp(16px,4vw,40px);
  --ease:cubic-bezier(.22,.61,.36,1);
  --maxw:1560px;
}

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

/* ---------- base ---------- */
body{
  min-height:100vh;
  background-color:var(--night);
  background-image:
    radial-gradient(1200px 620px at 10% -10%, rgba(53,240,192,.10), transparent 62%),
    radial-gradient(900px 520px at 94% 4%, rgba(124,107,255,.10), transparent 64%);
  background-repeat:no-repeat;
  color:var(--text);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

::selection{background:var(--neon);color:var(--night);}

:focus-visible{
  outline:2px solid var(--neon);
  outline-offset:3px;
}

/* ---------- typography ---------- */
h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:800;
  line-height:1.06;
  letter-spacing:-.01em;
}
h1{font-size:clamp(46px,9vw,128px);font-stretch:75%;}
h2{font-size:clamp(28px,4vw,52px);}
h3{font-size:clamp(20px,2.4vw,28px);}
h4{font-size:clamp(17px,1.6vw,20px);}

.mono{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:.02em;
}

.eyebrow{
  display:flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--muted);
}
.eyebrow::before{
  content:"";
  width:26px;
  height:2px;
  flex:none;
  background:var(--neon);
}

.annotation{
  writing-mode:vertical-rl;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.22em;
  color:var(--muted);
}

/* ---------- layout utilities ---------- */
.wrap{
  width:100%;
  max-width:var(--maxw);
  margin:0 auto;
  padding-inline:var(--gutter);
}

.section{
  padding-block:clamp(40px,7vw,96px);
  border-top:2px solid var(--line);
}
.section:first-of-type{border-top:0;}

.rule{
  height:2px;
  border:0;
  background:var(--line);
  margin-block:clamp(24px,4vw,48px);
}

.grid-12{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:clamp(14px,1.6vw,26px);
}

.prose{max-width:38em;font-size:17px;line-height:1.8;}
.prose p + p{margin-top:1em;}
.prose h2,.prose h3{margin-top:1.4em;margin-bottom:.5em;}
.prose ul,.prose ol{margin:1em 0;padding-left:1.2em;list-style:square;}
.prose li + li{margin-top:.4em;}
.prose a{border-bottom:2px solid var(--neon);}

/* ---------- components ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:12px 20px;
  border:2px solid var(--line);
  background:var(--panel);
  color:var(--text);
  font-size:15px;
  font-weight:700;
  letter-spacing:.04em;
  box-shadow:5px 5px 0 var(--shadow);
  transition:transform .16s var(--ease),box-shadow .16s var(--ease),
             background-color .16s var(--ease),color .16s var(--ease),
             border-color .16s var(--ease);
}
.btn:hover{transform:translate(2px,2px);box-shadow:3px 3px 0 var(--shadow);}
.btn--primary{background:var(--neon);border-color:var(--neon);color:var(--night);}
.btn--ghost{background:transparent;}
.btn--alert{border-color:var(--alert);color:var(--alert);}
.btn--alert:hover{background:var(--alert);color:var(--night);}

.panel{
  background:var(--panel);
  border:2px solid var(--line);
  box-shadow:6px 6px 0 var(--shadow);
  padding:clamp(18px,2.4vw,28px);
}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 10px;
  border:1px solid var(--line);
  background:rgba(16,42,34,.6);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--muted);
}
.tag--live{color:var(--neon);border-color:var(--neon);}
.tag--warn{color:var(--amber);border-color:var(--amber);}
.tag--alert{color:var(--alert);border-color:var(--alert);}

.breadcrumbs{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--muted);
}
.breadcrumbs ol{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
}
.breadcrumbs li + li::before{
  content:"/";
  margin-right:10px;
  color:var(--line);
}
.breadcrumbs a:hover{color:var(--neon);}

.media-frame{
  position:relative;
  border:2px solid var(--line);
  background:var(--panel);
  box-shadow:6px 6px 0 var(--shadow);
  overflow:hidden;
  aspect-ratio:16 / 9;
}
.media-frame img{
  width:100%;
  height:100%;
  object-fit:cover;
  filter:saturate(88%) contrast(106%);
}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(5,16,12,0) 42%,rgba(5,16,12,.62) 100%);
  pointer-events:none;
}
.media-frame--wide{aspect-ratio:21 / 9;}
.media-frame--tall{aspect-ratio:3 / 4;}

/* ---------- skip link ---------- */
.skip-link{
  position:fixed;
  top:-80px;
  left:12px;
  z-index:120;
  padding:10px 16px;
  border:2px solid var(--neon);
  background:var(--neon);
  color:var(--night);
  font-weight:700;
  box-shadow:4px 4px 0 var(--shadow);
  transition:top .16s var(--ease);
}
.skip-link:focus{top:12px;}
.skip-link:focus-visible{outline-offset:4px;}

/* ---------- header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(5,16,12,.94);
  border-bottom:2px solid var(--line);
  -webkit-backdrop-filter:blur(8px) saturate(140%);
  backdrop-filter:blur(8px) saturate(140%);
}

.header-inner{
  width:100%;
  max-width:var(--maxw);
  margin:0 auto;
  padding:12px var(--gutter);
  display:flex;
  align-items:center;
  justify-content:flex-start;
  gap:clamp(10px,1.4vw,24px);
}

.brand-lock{
  display:flex;
  flex-direction:column;
  gap:5px;
  min-width:0;
  margin-right:auto;
}

.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
}

.brand-mark{
  width:14px;
  height:22px;
  flex:none;
  border:2px solid var(--neon);
  background:linear-gradient(180deg,rgba(53,240,192,.55),rgba(53,240,192,0) 72%);
  box-shadow:3px 3px 0 var(--shadow);
}

.brand-name{
  font-family:var(--font-display);
  font-weight:800;
  font-size:clamp(17px,1.6vw,22px);
  letter-spacing:.08em;
}

.status-hint{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.04em;
  color:var(--muted);
}

.status-lamp{
  width:9px;
  height:9px;
  flex:none;
  background:var(--neon);
  box-shadow:0 0 0 3px rgba(53,240,192,.16);
  animation:lamp-breathe 3s ease-in-out infinite;
}

@keyframes lamp-breathe{
  0%,100%{opacity:1;box-shadow:0 0 0 3px rgba(53,240,192,.16);}
  50%{opacity:.55;box-shadow:0 0 0 6px rgba(53,240,192,.06);}
}

.season-chip{
  display:inline-block;
  padding:1px 6px;
  background:var(--neon);
  color:var(--night);
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.06em;
  font-variant-numeric:tabular-nums;
}

.site-nav{display:flex;align-items:center;}

.nav-list{
  display:flex;
  align-items:center;
  gap:4px;
  flex-wrap:wrap;
}

.nav-link{
  display:block;
  padding:7px 12px;
  border:2px solid transparent;
  font-size:14px;
  font-weight:600;
  color:var(--muted);
  white-space:nowrap;
  transition:color .16s var(--ease),background-color .16s var(--ease),
             border-color .16s var(--ease);
}
.nav-link:hover{
  color:var(--text);
  border-color:var(--line);
  background:var(--panel);
}
.nav-link[aria-current="page"]{
  color:var(--night);
  background:var(--neon);
  border-color:var(--neon);
  box-shadow:3px 3px 0 var(--shadow);
}

.nav-cta{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:8px 14px;
  border:2px solid var(--alert);
  color:var(--alert);
  font-size:13.5px;
  font-weight:700;
  letter-spacing:.04em;
  white-space:nowrap;
  box-shadow:4px 4px 0 var(--shadow);
  transition:background-color .16s var(--ease),color .16s var(--ease),
             transform .16s var(--ease),box-shadow .16s var(--ease);
}
.nav-cta:hover{
  background:var(--alert);
  color:var(--night);
  transform:translate(2px,2px);
  box-shadow:2px 2px 0 var(--shadow);
}

.nav-toggle{
  display:none;
  align-items:center;
  gap:8px;
  padding:8px 12px;
  border:2px solid var(--line);
  background:var(--panel);
  color:var(--text);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.14em;
  box-shadow:3px 3px 0 var(--shadow);
}
.nav-toggle[aria-expanded="true"]{border-color:var(--neon);}

.nav-toggle-bars{
  display:inline-flex;
  flex-direction:column;
  gap:3px;
}
.nav-toggle-bar{
  display:block;
  width:16px;
  height:2px;
  background:var(--neon);
}
.nav-toggle-label{line-height:1;}

/* ---------- footer ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(40px,6vw,80px);
  background:var(--deep);
  border-top:2px solid var(--line);
  color:var(--text);
}

.footer-inner{
  width:100%;
  max-width:var(--maxw);
  margin:0 auto;
  padding:clamp(32px,4.5vw,64px) var(--gutter) 24px;
  display:flex;
  flex-direction:column;
  gap:clamp(22px,3vw,40px);
}

.site-footer[data-reveal="ready"] .footer-inner{
  opacity:0;
  transform:translateX(12px);
}
.site-footer[data-reveal="in"] .footer-inner{
  opacity:1;
  transform:none;
  transition:opacity .32s var(--ease),transform .32s var(--ease);
}

.footer-rule{
  height:2px;
  background:linear-gradient(90deg,var(--neon),var(--line) 42%,rgba(30,76,62,0) 100%);
}

.footer-grid{
  display:grid;
  grid-template-columns:1.3fr .9fr 1fr 1.2fr .8fr;
  gap:clamp(22px,3vw,52px);
}

.footer-col{
  display:flex;
  flex-direction:column;
  gap:12px;
  min-width:0;
}
.footer-col--brand{max-width:26em;}
.footer-col--legal{min-width:0;}

.footer-brand{
  font-family:var(--font-display);
  font-size:clamp(20px,2vw,26px);
  font-weight:800;
  letter-spacing:.06em;
}

.footer-tagline{
  font-size:14.5px;
  line-height:1.7;
  color:var(--muted);
}

.footer-note{
  font-size:11.5px;
  color:var(--muted);
  letter-spacing:.06em;
}

.footer-title{
  display:flex;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:600;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--neon);
}
.footer-title::after{
  content:"";
  flex:1;
  height:1px;
  background:var(--line);
}

.footer-list{
  display:flex;
  flex-direction:column;
  gap:8px;
}
.footer-list a{
  font-size:14.5px;
  color:var(--muted);
  transition:color .16s var(--ease),padding-left .16s var(--ease);
}
.footer-list a:hover{
  color:var(--neon);
  padding-left:4px;
}

.footer-contact{
  display:flex;
  flex-direction:column;
  gap:8px;
  font-size:13.5px;
  color:var(--muted);
}
.footer-contact .mono{
  font-size:13px;
  color:var(--text);
}

.footer-link-more{
  align-self:flex-start;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--neon);
  border-bottom:1px solid var(--line);
  padding-bottom:2px;
  transition:border-color .16s var(--ease),color .16s var(--ease);
}
.footer-link-more:hover{border-color:var(--neon);}

.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:8px 20px;
  padding-top:16px;
  border-top:1px solid var(--line);
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.02em;
  color:var(--muted);
}
.footer-bottom-line{line-height:1.6;}

/* ---------- floating controls ---------- */
.to-top{
  position:fixed;
  right:16px;
  bottom:16px;
  z-index:80;
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:10px 14px;
  border:2px solid var(--line);
  background:var(--panel);
  color:var(--text);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.1em;
  box-shadow:4px 4px 0 var(--shadow);
  opacity:0;
  visibility:hidden;
  pointer-events:none;
  transform:translateY(8px);
  transition:opacity .2s var(--ease),transform .2s var(--ease),
             color .16s var(--ease),border-color .16s var(--ease),
             visibility 0s linear .2s;
}
.to-top[data-visible="true"]{
  opacity:1;
  visibility:visible;
  pointer-events:auto;
  transform:none;
  transition:opacity .2s var(--ease),transform .2s var(--ease),
             color .16s var(--ease),border-color .16s var(--ease),
             visibility 0s;
}
.to-top:hover{border-color:var(--neon);color:var(--neon);}

.scroll-progress{
  position:fixed;
  top:0;
  left:0;
  width:100%;
  height:3px;
  z-index:90;
  background:linear-gradient(90deg,var(--neon),var(--teal) 55%,var(--violet));
  transform:scaleX(0);
  transform-origin:0 50%;
  pointer-events:none;
}

/* ---------- tablet ---------- */
@media (max-width:1200px){
  .footer-grid{
    grid-template-columns:1.3fr 1fr 1fr;
  }
  .footer-col--brand{grid-column:span 3;}
  .footer-col--legal{grid-column:span 1;}
}

@media (max-width:1080px){
  .nav-link{font-size:13px;padding:6px 9px;}
  .nav-cta{font-size:12.5px;padding:7px 11px;}
}

/* ---------- mobile nav / small screens ---------- */
@media (max-width:900px){
  .nav-toggle{display:inline-flex;}

  .site-nav{
    position:fixed;
    left:0;
    right:0;
    bottom:0;
    z-index:75;
    display:block;
    max-height:80vh;
    overflow-y:auto;
    padding:16px var(--gutter) 88px;
    background:var(--deep);
    border-top:2px solid var(--line);
    box-shadow:0 -6px 0 var(--shadow);
    transform:translateY(100%);
    visibility:hidden;
    transition:transform .22s var(--ease),visibility 0s linear .22s;
  }
  .site-nav[data-open="true"]{
    transform:translateY(0);
    visibility:visible;
    transition:transform .22s var(--ease),visibility 0s;
  }

  .nav-list{
    flex-direction:column;
    align-items:stretch;
    gap:6px;
  }
  .nav-link{
    padding:12px 14px;
    border-color:var(--line);
    background:var(--panel);
    color:var(--text);
    font-size:16px;
  }
  .nav-link[aria-current="page"]{
    box-shadow:none;
    background:var(--neon);
    color:var(--night);
    border-color:var(--neon);
  }

  .nav-cta{
    position:fixed;
    right:12px;
    bottom:12px;
    z-index:80;
    background:rgba(5,16,12,.92);
  }

  .to-top{
    left:12px;
    right:auto;
    bottom:12px;
  }

  .footer-grid{grid-template-columns:1fr 1fr;}
  .footer-col--brand{grid-column:span 2;}

  .grid-12{grid-template-columns:repeat(4,minmax(0,1fr));}
}

@media (max-width:600px){
  .brand-name{font-size:18px;}
  .status-hint{font-size:11px;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-col--brand{grid-column:span 1;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .to-top span:last-child{display:none;}
}

/* ---------- reduced motion ---------- */
@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;
  }
  .status-lamp{animation:none;}
  .site-footer[data-reveal="ready"] .footer-inner{opacity:1;transform:none;}
}