:root{
  --color-bg:#0B0F1A;
  --color-panel:#131B2B;
  --color-green:#C6FF00;
  --color-cyan:#00E5FF;
  --color-metal:#A3B5C6;
  --color-text:#F2F6F9;
  --color-muted:#8A9BAE;
  --color-warn:#FFB300;
  --color-glass:rgba(24,36,56,0.7);
  --header-h:64px;
  --container-w:1200px;
  --shadow-panel:0 24px 60px rgba(0,0,0,0.45);
  --font-main:"PingFang SC","Microsoft YaHei","Roboto",sans-serif;
  --font-display:"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-mono:"JetBrains Mono","SFMono-Regular",Consolas,monospace;
}

*,
*::before,
*::after{
  box-sizing:border-box;
  margin:0;
  padding:0;
}

html{
  scroll-behavior:smooth;
}

body{
  min-height:100vh;
  background-color:var(--color-bg);
  background-image:
    radial-gradient(circle at 15% -10%, rgba(0,229,255,0.12), transparent 35%),
    linear-gradient(rgba(0,229,255,0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,229,255,0.045) 1px, transparent 1px);
  background-size:auto, 32px 32px, 32px 32px;
  color:var(--color-text);
  font-family:var(--font-main);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  padding-top:calc(var(--header-h) + 32px);
}

img,
svg{
  max-width:100%;
  display:block;
}

a{
  color:var(--color-cyan);
  text-decoration:none;
}

a:hover{
  color:var(--color-green);
}

ul,
ol{
  list-style:none;
}

button,
input{
  font:inherit;
  color:inherit;
}

.visually-hidden{
  position:absolute;
  width:1px;
  height:1px;
  padding:0;
  margin:-1px;
  overflow:hidden;
  clip:rect(0 0 0 0);
  white-space:nowrap;
  border:0;
}

a:focus-visible,
button:focus-visible,
[tabindex]:focus-visible{
  outline:2px solid var(--color-green);
  outline-offset:4px;
  border-radius:6px;
}

.skip-link{
  position:fixed;
  top:-100px;
  left:16px;
  z-index:9999;
  background:var(--color-green);
  color:var(--color-bg);
  padding:8px 16px;
  border-radius:999px;
  font-weight:700;
  transition:top 0.2s ease;
}

.skip-link:focus{
  top:12px;
}

.site-header{
  position:fixed;
  top:12px;
  left:0;
  right:0;
  z-index:1000;
  display:flex;
  justify-content:center;
  padding:0 20px;
  pointer-events:none;
}

.header-inner{
  position:relative;
  pointer-events:auto;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  max-width:var(--container-w);
  width:100%;
  min-height:var(--header-h);
  background:var(--color-glass);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border:1px solid rgba(0,229,255,0.25);
  border-radius:999px;
  padding:8px 12px 8px 18px;
  box-shadow:0 12px 40px rgba(0,0,0,0.35);
}

.header-progress{
  position:absolute;
  left:0;
  bottom:-2px;
  height:3px;
  width:0%;
  background:linear-gradient(90deg, var(--color-green), var(--color-cyan));
  border-radius:999px;
  transition:width 0.08s linear;
}

.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  color:var(--color-text);
  font-family:var(--font-display);
  font-weight:900;
  font-size:20px;
  letter-spacing:0.02em;
  white-space:nowrap;
}

.brand:hover{
  color:var(--color-green);
}

.brand-mark{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:40px;
  height:40px;
  border-radius:12px;
  background:linear-gradient(135deg, var(--color-green), var(--color-cyan));
  color:var(--color-bg);
  font-size:18px;
  font-weight:900;
  box-shadow:0 0 20px rgba(0,229,255,0.3);
  transform:skewX(-8deg);
}

.brand-text{
  white-space:nowrap;
}

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

.nav-list{
  display:flex;
  gap:2px;
  flex-wrap:wrap;
}

.nav-link{
  display:inline-block;
  padding:7px 14px;
  border-radius:999px;
  color:var(--color-metal);
  font-weight:600;
  font-size:15px;
  border:1px solid transparent;
  transition:color 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.nav-link:hover{
  color:var(--color-bg);
  background:var(--color-green);
  border-color:transparent;
}

.nav-link[aria-current="page"]{
  color:var(--color-cyan);
  border-color:rgba(0,229,255,0.5);
  background:rgba(0,229,255,0.08);
}

.header-contact{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:8px 18px;
  border-radius:999px;
  color:var(--color-bg);
  background:var(--color-cyan);
  font-weight:700;
  font-size:14px;
  box-shadow:0 0 12px rgba(0,229,255,0.25), 6px 6px 0 0 var(--color-green);
  transition:transform 0.2s ease, box-shadow 0.2s ease;
}

.header-contact:hover{
  color:var(--color-bg);
  transform:translate(2px, 2px);
  box-shadow:2px 2px 0 0 var(--color-green);
}

.nav-toggle{
  display:none;
  position:relative;
  width:44px;
  height:44px;
  border:1px solid rgba(0,229,255,0.3);
  background:rgba(0,0,0,0.2);
  border-radius:50%;
  cursor:pointer;
}

.nav-toggle-line{
  position:absolute;
  left:10px;
  right:10px;
  height:2px;
  background:var(--color-cyan);
  border-radius:2px;
  transition:transform 0.3s ease, opacity 0.3s ease;
}

.nav-toggle-line:nth-child(1){
  top:14px;
}

.nav-toggle-line:nth-child(2){
  top:21px;
}

.nav-toggle-line:nth-child(3){
  top:28px;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(1){
  transform:translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(2){
  opacity:0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(3){
  transform:translateY(-7px) rotate(-45deg);
}

@media (max-width:920px){
  .nav-toggle{
    display:block;
  }

  .site-nav{
    position:absolute;
    top:calc(100% + 10px);
    left:0;
    right:0;
    display:none;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    background:rgba(11,15,26,0.96);
    border:1px solid rgba(0,229,255,0.3);
    border-radius:24px;
    padding:16px;
    box-shadow:var(--shadow-panel);
  }

  .site-nav[data-open="true"]{
    display:flex;
  }

  .nav-list{
    flex-direction:column;
    gap:10px;
  }

  .nav-link{
    padding:12px 16px;
    font-size:17px;
  }

  .header-contact{
    margin-top:12px;
    justify-content:center;
  }
}

.site-footer{
  border-top:1px solid rgba(0,229,255,0.2);
  background:linear-gradient(180deg, var(--color-panel) 0%, #0D1420 100%);
  position:relative;
  overflow:hidden;
}

.site-footer::before{
  content:"";
  position:absolute;
  top:0;
  left:0;
  right:0;
  height:4px;
  background:linear-gradient(90deg, var(--color-green), var(--color-cyan), transparent 80%);
}

.footer-grid{
  max-width:var(--container-w);
  margin:0 auto;
  padding:56px 24px 32px;
  display:grid;
  grid-template-columns:5fr 3fr 4fr;
  gap:48px;
}

.footer-brand .brand{
  margin-bottom:16px;
}

.footer-brand p{
  color:var(--color-muted);
  font-size:14px;
  max-width:46em;
}

.trust-note{
  margin-top:12px;
  padding:10px 14px;
  border-left:3px solid var(--color-warn);
  background:rgba(255,179,0,0.08);
  color:var(--color-metal);
  font-size:13px;
}

.footer-links h3,
.footer-contact h3{
  font-family:var(--font-display);
  font-size:16px;
  font-weight:900;
  color:var(--color-text);
  letter-spacing:0.12em;
  text-transform:uppercase;
  margin-bottom:16px;
}

.footer-links ul,
.footer-contact ul{
  display:grid;
  gap:10px;
}

.footer-links a,
.footer-contact a{
  color:var(--color-metal);
  font-size:14px;
}

.footer-links a:hover,
.footer-contact a:hover{
  color:var(--color-green);
}

.footer-contact li{
  color:var(--color-muted);
  font-size:14px;
}

.footer-support{
  margin-top:18px;
  padding-top:14px;
  border-top:1px dashed rgba(0,229,255,0.2);
  color:var(--color-metal);
  font-size:13px;
}

.footer-bottom{
  max-width:var(--container-w);
  margin:0 auto;
  padding:20px 24px 24px;
  display:flex;
  justify-content:space-between;
  gap:12px;
  flex-wrap:wrap;
  border-top:1px solid rgba(163,181,198,0.12);
  color:var(--color-muted);
  font-size:13px;
}

.container{
  max-width:var(--container-w);
  margin:0 auto;
  padding-left:24px;
  padding-right:24px;
  width:100%;
}

.section{
  padding:calc(40px + 4vw) 0;
  position:relative;
}

.section--tight{
  padding:32px 0;
}

.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:24px;
  margin-bottom:40px;
  border-bottom:1px solid rgba(0,229,255,0.16);
  padding-bottom:16px;
}

.section-title{
  font-family:var(--font-display);
  font-size:clamp(28px, 3vw, 44px);
  line-height:1.15;
  font-weight:900;
  letter-spacing:-0.02em;
}

.section-title mark{
  background:linear-gradient(transparent 60%, var(--color-green) 60%);
  color:var(--color-text);
}

.section-index{
  font-family:var(--font-mono);
  font-size:13px;
  color:var(--color-cyan);
  letter-spacing:0.2em;
}

.section-meta{
  color:var(--color-muted);
  max-width:48ch;
  font-size:15px;
}

.btn{
  display:inline-block;
  padding:12px 22px;
  border-radius:6px;
  font-weight:700;
  font-size:15px;
  text-align:center;
  transition:transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
  border:1px solid transparent;
  cursor:pointer;
  text-decoration:none;
}

.btn-primary{
  color:var(--color-bg);
  background:var(--color-green);
  border-color:var(--color-green);
  clip-path:polygon(10px 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%, 0 10px);
  box-shadow:6px 6px 0 0 var(--color-cyan);
}

.btn-primary:hover{
  transform:translate(2px, 2px);
  box-shadow:2px 2px 0 0 var(--color-cyan);
}

.btn-secondary{
  color:var(--color-cyan);
  background:transparent;
  border-color:var(--color-cyan);
  clip-path:polygon(10px 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%, 0 10px);
}

.btn-secondary:hover{
  background:rgba(0,229,255,0.12);
  color:var(--color-green);
  border-color:var(--color-green);
}

.btn-ghost{
  color:var(--color-metal);
  border-color:rgba(163,181,198,0.5);
  background:transparent;
}

.btn-ghost:hover{
  color:var(--color-text);
  border-color:var(--color-text);
}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 10px;
  border-radius:999px;
  font-size:12px;
  font-weight:700;
  letter-spacing:0.08em;
  text-transform:uppercase;
  border:1px solid transparent;
}

.tag::before{
  content:"";
  width:6px;
  height:6px;
  border-radius:50%;
  background:currentColor;
}

.tag-green{
  color:var(--color-green);
  border-color:rgba(198,255,0,0.35);
}

.tag-cyan{
  color:var(--color-cyan);
  border-color:rgba(0,229,255,0.35);
}

.tag-orange{
  color:var(--color-warn);
  border-color:rgba(255,179,0,0.35);
}

.card{
  background:linear-gradient(140deg, rgba(19,27,43,0.95), rgba(11,15,26,0.9));
  border:1px solid rgba(0,229,255,0.18);
  border-radius:18px;
  padding:24px;
  box-shadow:var(--shadow-panel);
  position:relative;
  overflow:hidden;
}

.card::after{
  content:"";
  position:absolute;
  top:0;
  right:0;
  bottom:0;
  width:6px;
  background:linear-gradient(180deg, var(--color-green), var(--color-cyan));
  opacity:0.5;
  transition:opacity 0.2s ease;
}

.card:hover::after{
  opacity:1;
}

.card-title{
  font-family:var(--font-display);
  font-size:20px;
  font-weight:900;
  margin:10px 0 8px;
}

.card-meta{
  font-family:var(--font-mono);
  font-size:13px;
  color:var(--color-cyan);
  letter-spacing:0.06em;
}

.card-body{
  color:var(--color-muted);
  font-size:15px;
  margin-top:8px;
}

.grid-2,
.grid-3,
.grid-4{
  display:grid;
  gap:24px;
}

.grid-2{
  grid-template-columns:repeat(2, 1fr);
}

.grid-3{
  grid-template-columns:repeat(3, 1fr);
}

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

.stat{
  background:var(--color-panel);
  padding:20px;
  border-radius:16px;
  border-left:4px solid var(--color-green);
  box-shadow:8px 8px 0 0 rgba(0,0,0,0.25);
}

.stat-value{
  font-family:var(--font-mono);
  font-size:clamp(28px, 4vw, 44px);
  font-weight:700;
  color:var(--color-cyan);
  line-height:1.2;
}

.stat-label{
  font-size:13px;
  color:var(--color-muted);
  margin-top:4px;
  letter-spacing:0.08em;
}

.media{
  position:relative;
  width:100%;
  border-radius:16px;
  overflow:hidden;
  border:1px solid rgba(0,229,255,0.2);
  background:linear-gradient(135deg, rgba(0,229,255,0.06), rgba(198,255,0,0.04));
  aspect-ratio:16 / 9;
}

.media img{
  width:100%;
  height:100%;
  object-fit:cover;
}

.media--square{
  aspect-ratio:1 / 1;
}

.media--wide{
  aspect-ratio:21 / 9;
}

.media--sport{
  aspect-ratio:4 / 3;
}

.prose{
  max-width:72ch;
  color:rgba(242,246,249,0.85);
  font-size:16px;
  line-height:2;
}

.prose h2,
.prose h3{
  font-family:var(--font-display);
  color:var(--color-text);
  margin:2em 0 0.8em;
}

.prose p{
  margin-bottom:1.2em;
}

.prose a{
  color:var(--color-cyan);
  text-decoration:underline;
  text-underline-offset:4px;
}

.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  font-size:14px;
  color:var(--color-muted);
  margin-bottom:24px;
}

.breadcrumb a{
  color:var(--color-cyan);
}

.breadcrumb a:hover{
  color:var(--color-green);
}

.breadcrumb span.current{
  color:var(--color-text);
}

html.js [data-reveal]{
  opacity:0;
  transform:translateY(16px);
  transition:opacity 0.6s ease-out, transform 0.6s ease-out;
}

html.js [data-reveal].is-revealed{
  opacity:1;
  transform:none;
}

@media (max-width:900px){
  .footer-grid{
    grid-template-columns:1fr 1fr;
    gap:32px;
  }

  .grid-4{
    grid-template-columns:repeat(2, 1fr);
  }

  .grid-3{
    grid-template-columns:repeat(2, 1fr);
  }
}

@media (max-width:600px){
  .footer-grid{
    grid-template-columns:1fr;
    gap:28px;
    padding-top:40px;
  }

  .footer-bottom{
    justify-content:center;
    text-align:center;
  }

  .section-head{
    flex-direction:column;
    align-items:flex-start;
  }

  .grid-2,
  .grid-3,
  .grid-4{
    grid-template-columns:1fr;
  }
}

@media (prefers-reduced-motion: reduce){
  html{
    scroll-behavior:auto;
  }

  *,
  *::before,
  *::after{
    animation-duration:0.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:0.01ms !important;
  }

  .header-progress{
    transition:none;
  }

  .nav-toggle-line{
    transition:none;
  }

  html.js [data-reveal],
  html.js [data-reveal].is-revealed{
    opacity:1;
    transform:none;
    transition:none;
  }
}