:root{
  --bg-ink:#0A1120;
  --bg-deep:#102A43;
  --surface:#1B2A44;
  --border-line:#2D4A6B;
  --primary:#00FF88;
  --accent-orange:#FF7A00;
  --accent-violet:#9B50FF;
  --text-light:#E5F0F5;
  --text-muted:#B0C4DE;
  --font-head:"PingFang SC","Noto Sans CJK SC","Microsoft YaHei",sans-serif;
  --font-body:"Source Sans Pro","Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-data:"Roboto Mono","JetBrains Mono","SFMono-Regular",Consolas,monospace;
  --header-w:260px;
  --topbar-h:36px;
  --container-w:1200px;
  --pad:clamp(16px,4vw,48px);
  --shadow:0 8px 32px rgba(0,0,0,0.3);
}

*,*::before,*::after{box-sizing:border-box}

html{
  height:100%;
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
}

body{
  min-height:100%;
  margin:0;
  padding-top:var(--topbar-h);
  padding-left:var(--header-w);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.65;
  color:var(--text-light);
  background:var(--bg-ink);
  color-scheme:dark;
  -webkit-font-smoothing:antialiased;
}

main{display:block}

h1,h2,h3,h4{
  font-family:var(--font-head);
  color:var(--text-light);
  line-height:1.25;
  margin:0 0 0.6em;
}

p{margin:0 0 1em}

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

a{
  color:var(--text-light);
  text-decoration-thickness:1px;
  text-underline-offset:3px;
}

button{font-family:inherit}

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

#main-content:focus-visible{
  outline-offset:-2px;
}

::selection{
  background:var(--primary);
  color:var(--bg-ink);
}

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:0.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:0.001ms !important;
  }
  [data-reveal]{
    opacity:1 !important;
    transform:none !important;
  }
}

.container{
  width:min(var(--container-w), calc(100% - 2 * var(--pad)));
  margin-inline:auto;
}

.page-shell{
  min-height:60vh;
  outline:none;
}

.section{
  padding:clamp(40px,7vw,88px) 0;
}

.section--deep{
  background:var(--bg-deep);
  border-top:1px solid var(--border-line);
  border-bottom:1px solid var(--border-line);
}

.section--split{
  position:relative;
  background:linear-gradient(115deg, var(--bg-deep), var(--bg-ink) 65%, #0c2038);
  border-top:1px solid var(--border-line);
  border-bottom:1px solid var(--border-line);
}

.section--split::before{
  content:"";
  position:absolute;
  inset:0;
  background:repeating-linear-gradient(135deg, transparent 0 22px, rgba(155,80,255,0.06) 22px 23px), linear-gradient(115deg, rgba(0,255,136,0.05), transparent 40%);
  pointer-events:none;
}

.section__header{
  display:flex;
  align-items:baseline;
  gap:16px;
  margin-bottom:28px;
  position:relative;
  z-index:1;
}

.section__index{
  font-family:var(--font-data);
  color:var(--primary);
  font-size:14px;
  letter-spacing:0.12em;
}

.section__title{
  font-family:var(--font-head);
  font-size:clamp(28px,4vw,42px);
  font-weight:900;
  letter-spacing:0.02em;
  margin:0;
}

.section__subtitle{
  color:var(--text-muted);
  max-width:46em;
  margin:0;
  line-height:1.8;
}

.grid{
  display:grid;
  gap:22px;
}

.grid--2{
  grid-template-columns:repeat(2, minmax(0,1fr));
}

.grid--3{
  grid-template-columns:repeat(3, minmax(0,1fr));
}

.frame{
  position:relative;
  border:1px solid var(--border-line);
  box-shadow:var(--shadow);
  background:linear-gradient(135deg, rgba(0,255,136,0.05), transparent 30%), linear-gradient(315deg, rgba(155,80,255,0.07), transparent 40%), var(--surface);
}

.frame::before{
  content:"";
  position:absolute;
  top:-1px;
  left:-1px;
  width:18px;
  height:18px;
  border-top:2px solid var(--primary);
  border-left:2px solid var(--primary);
}

.frame::after{
  content:"";
  position:absolute;
  bottom:-1px;
  right:-1px;
  width:18px;
  height:18px;
  border-bottom:2px solid var(--primary);
  border-right:2px solid var(--primary);
}

.data-card{
  position:relative;
  background:var(--surface);
  border:1px solid var(--border-line);
  border-radius:8px;
  padding:20px;
  box-shadow:var(--shadow);
  transition:border-color 0.25s, transform 0.25s;
}

.data-card:hover{
  border-color:rgba(0,255,136,0.45);
  transform:translateY(-2px);
}

.data-card::after{
  content:"";
  position:absolute;
  top:8px;
  right:8px;
  width:10px;
  height:10px;
  border-top:1px solid var(--primary);
  border-right:1px solid var(--primary);
  opacity:0.7;
}

.data-card__header{
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:12px;
  margin-bottom:12px;
}

.data-card__title{
  font-family:var(--font-data);
  font-size:12px;
  letter-spacing:0.1em;
  color:var(--text-muted);
  text-transform:uppercase;
}

.data-card__value{
  font-family:var(--font-data);
  font-size:36px;
  font-weight:700;
  line-height:1;
  color:var(--primary);
  font-variant-numeric:tabular-nums;
}

.data-card__meta{
  margin-top:8px;
  font-size:13px;
  color:var(--text-muted);
}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 22px;
  border-radius:4px;
  border:1px solid transparent;
  background:transparent;
  color:var(--text-light);
  font-family:var(--font-body);
  font-size:14px;
  font-weight:700;
  text-decoration:none;
  cursor:pointer;
  transition:background 0.2s, color 0.2s, border-color 0.2s, box-shadow 0.2s, transform 0.2s;
}

.btn--primary{
  background:var(--primary);
  color:var(--bg-ink);
  box-shadow:0 0 18px rgba(0,255,136,0.25);
}

.btn--primary:hover{
  background:#33ff9e;
  box-shadow:0 6px 24px rgba(0,255,136,0.45);
  transform:translateY(-1px);
}

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

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

.tag{
  display:inline-flex;
  align-items:center;
  padding:4px 10px;
  border:1px solid var(--border-line);
  border-radius:999px;
  background:rgba(255,255,255,0.02);
  color:var(--text-muted);
  font-size:12px;
  letter-spacing:0.04em;
}

.tag--orange{
  color:var(--accent-orange);
  border-color:rgba(255,122,0,0.5);
  background:rgba(255,122,0,0.08);
}

.tag--violet{
  color:var(--accent-violet);
  border-color:rgba(155,80,255,0.5);
  background:rgba(155,80,255,0.08);
}

.table-wrap{
  overflow-x:auto;
  border:1px solid var(--border-line);
  border-radius:8px;
  background:var(--surface);
  box-shadow:var(--shadow);
}

.data-table{
  width:100%;
  border-collapse:collapse;
  font-size:14px;
}

.data-table th{
  padding:12px 14px;
  text-align:left;
  font-family:var(--font-data);
  font-size:12px;
  letter-spacing:0.08em;
  color:var(--primary);
  background:rgba(0,255,136,0.04);
  border-bottom:1px solid var(--border-line);
}

.data-table td{
  padding:12px 14px;
  border-bottom:1px solid var(--border-line);
  color:var(--text-light);
  font-variant-numeric:tabular-nums;
}

.data-table tr:last-child td{
  border-bottom:0;
}

.data-table tbody tr:hover td{
  background:rgba(0,255,136,0.04);
}

.panel{
  border:1px solid var(--border-line);
  border-radius:8px;
  background:var(--surface);
  box-shadow:var(--shadow);
}

.panel__header{
  padding:16px 18px;
  border-bottom:1px solid var(--border-line);
  font-weight:700;
  color:var(--text-light);
}

.panel__body{
  padding:18px;
  color:var(--text-muted);
  font-size:15px;
  line-height:1.75;
}

.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  align-items:center;
  margin:0 0 24px;
  font-size:14px;
  color:var(--text-muted);
}

.breadcrumb__link{
  color:var(--text-muted);
  text-decoration:none;
  transition:color 0.2s;
}

.breadcrumb__link:hover{
  color:var(--primary);
}

.breadcrumb__sep{
  opacity:0.5;
}

.breadcrumb__current{
  color:var(--text-light);
}

.prose{
  color:var(--text-muted);
  font-size:16px;
  line-height:1.85;
}

.prose p{
  margin:0 0 1.2em;
}

.prose h2,.prose h3{
  margin-top:1.6em;
  color:var(--text-light);
}

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

.visual-frame{
  position:relative;
  display:grid;
  place-items:center;
  width:100%;
  min-height:220px;
  aspect-ratio:16/9;
  overflow:hidden;
  border:1px solid var(--border-line);
  background:linear-gradient(145deg, var(--surface), var(--bg-deep)), repeating-linear-gradient(135deg, rgba(0,255,136,0.06) 0 1px, transparent 1px 14px);
  color:var(--text-muted);
}

.visual-frame::before{
  content:"TRACK-IMG // 16:9";
  font-family:var(--font-data);
  font-size:12px;
  letter-spacing:0.2em;
  position:relative;
  z-index:2;
}

.visual-frame::after{
  content:"";
  position:absolute;
  inset:0;
  background:repeating-linear-gradient(-45deg, transparent 0 18px, rgba(0,255,136,0.04) 18px 19px);
  pointer-events:none;
}

.visual-frame.is-filled::before{
  display:none;
}

.visual-frame img{
  position:relative;
  z-index:1;
  width:100%;
  height:100%;
  object-fit:cover;
}

details{
  border:1px solid var(--border-line);
  border-radius:8px;
  background:var(--surface);
  overflow:hidden;
  box-shadow:var(--shadow);
}

summary{
  list-style:none;
  padding:15px 18px;
  color:var(--text-light);
  font-weight:700;
  cursor:pointer;
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:12px;
  transition:background 0.2s;
}

summary::-webkit-details-marker{
  display:none;
}

summary::after{
  content:"+";
  font-family:var(--font-data);
  font-size:20px;
  line-height:1;
  color:var(--primary);
}

details[open] summary{
  background:rgba(0,255,136,0.04);
}

details[open] summary::after{
  content:"−";
}

details > p{
  margin:0;
  padding:0 18px 16px;
  color:var(--text-muted);
  font-size:15px;
  line-height:1.75;
}

.skip-link{
  position:fixed;
  top:12px;
  left:12px;
  z-index:300;
  transform:translateY(-220%);
  background:var(--primary);
  color:var(--bg-ink);
  padding:10px 16px;
  border-radius:4px;
  font-weight:700;
  text-decoration:none;
  box-shadow:0 6px 20px rgba(0,0,0,0.4);
}

.skip-link:focus-visible{
  transform:translateY(0);
}

.topbar{
  position:fixed;
  top:0;
  left:0;
  right:0;
  height:var(--topbar-h);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:0 var(--pad);
  background:linear-gradient(90deg, var(--bg-deep), #0D1F33);
  border-bottom:1px solid var(--border-line);
  z-index:210;
  overflow:hidden;
}

.topbar__group{
  display:flex;
  align-items:center;
  gap:10px;
  min-width:0;
}

.topbar__brand{
  font-family:var(--font-head);
  font-weight:900;
  font-size:13px;
  letter-spacing:0.06em;
  color:var(--text-light);
  text-decoration:none;
  white-space:nowrap;
}

.topbar__brand:hover{
  color:var(--primary);
}

.topbar__label{
  font-family:var(--font-data);
  font-size:11px;
  letter-spacing:0.14em;
  color:var(--text-muted);
  text-transform:uppercase;
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}

.topbar__right{
  display:flex;
  align-items:center;
  gap:14px;
  flex:none;
}

.topbar__status{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family:var(--font-data);
  font-size:11px;
  letter-spacing:0.14em;
  color:var(--primary);
  text-transform:uppercase;
}

.glow-dot{
  width:8px;
  height:8px;
  border-radius:50%;
  background:var(--primary);
  box-shadow:0 0 10px var(--primary);
  flex:none;
  animation:pulse 2.2s ease-in-out infinite;
}

@keyframes pulse{
  0%,100%{opacity:1; transform:scale(1)}
  50%{opacity:0.45; transform:scale(0.72)}
}

.scroll-progress{
  position:absolute;
  bottom:0;
  left:0;
  width:0;
  height:2px;
  background:linear-gradient(90deg, var(--primary), var(--accent-violet));
  z-index:3;
  transition:width 0.12s linear;
}

.nav-toggle{
  display:none;
  align-items:center;
  gap:8px;
  padding:6px;
  border:0;
  background:none;
  color:var(--text-light);
  cursor:pointer;
  border-radius:4px;
  font-size:13px;
  font-weight:700;
}

.nav-toggle:hover{
  color:var(--primary);
}

.nav-toggle__label{
  line-height:1;
}

.nav-toggle__icon{
  width:22px;
  height:16px;
  position:relative;
  flex:none;
}

.nav-toggle__line{
  position:absolute;
  left:0;
  width:22px;
  height:2px;
  background:currentColor;
  border-radius:2px;
  transition:transform 0.25s, opacity 0.25s;
}

.nav-toggle__line:nth-child(1){
  top:0;
}

.nav-toggle__line:nth-child(2){
  top:7px;
}

.nav-toggle__line:nth-child(3){
  top:14px;
}

.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);
}

.site-header{
  position:fixed;
  top:var(--topbar-h);
  left:0;
  width:var(--header-w);
  height:calc(100vh - var(--topbar-h));
  display:flex;
  background:linear-gradient(165deg, rgba(155,80,255,0.06), transparent 40%), linear-gradient(135deg, transparent 70%, rgba(0,255,136,0.05) 70%), var(--bg-ink);
  border-right:1px solid var(--border-line);
  z-index:150;
  opacity:1;
  visibility:visible;
}

.site-header__inner{
  width:100%;
  padding:28px 20px 24px;
  display:flex;
  flex-direction:column;
  gap:22px;
}

.site-header__brand{
  display:flex;
  align-items:center;
  gap:12px;
  text-decoration:none;
  color:var(--text-light);
}

.site-header__brand:hover .brand-mark{
  border-color:var(--primary);
  box-shadow:0 0 14px rgba(0,255,136,0.35);
}

.brand-mark{
  position:relative;
  width:40px;
  height:40px;
  flex:none;
  display:grid;
  place-items:center;
  border:1px solid rgba(0,255,136,0.5);
  border-radius:2px;
  transform:rotate(45deg);
  transition:box-shadow 0.2s, border-color 0.2s;
}

.brand-mark::before{
  content:"";
  position:absolute;
  inset:5px;
  background:linear-gradient(135deg, rgba(0,255,136,0.75), rgba(155,80,255,0.75));
  clip-path:polygon(50% 0, 100% 50%, 50% 100%, 0 50%);
}

.brand-mark__core{
  position:relative;
  z-index:1;
  width:8px;
  height:8px;
  background:var(--bg-ink);
  transform:rotate(-45deg);
  box-shadow:0 0 8px var(--primary);
}

.brand-copy{
  display:flex;
  flex-direction:column;
  min-width:0;
}

.brand-copy__name{
  font-family:var(--font-head);
  font-weight:900;
  font-size:17px;
  letter-spacing:0.03em;
  color:var(--text-light);
  white-space:nowrap;
}

.brand-copy__sub{
  font-family:var(--font-data);
  font-size:9px;
  letter-spacing:0.18em;
  color:var(--text-muted);
  text-transform:uppercase;
}

.site-nav{
  flex:1;
  display:flex;
  align-items:stretch;
}

.site-nav__list{
  list-style:none;
  margin:0;
  padding:0;
  width:100%;
  display:grid;
  gap:4px;
}

.site-nav__item{
  margin:0;
}

.site-nav__link{
  display:flex;
  align-items:center;
  gap:12px;
  padding:12px 14px;
  border-radius:4px;
  color:var(--text-muted);
  text-decoration:none;
  font-weight:600;
  font-size:15px;
  line-height:1.3;
  transition:color 0.2s, background 0.2s;
}

.site-nav__link::before{
  content:"";
  width:3px;
  height:18px;
  flex:none;
  background:var(--primary);
  border-radius:99px;
  opacity:0;
  transform:scaleY(0);
  transition:opacity 0.2s, transform 0.25s;
}

.site-nav__link:hover{
  color:var(--text-light);
  background:rgba(0,255,136,0.06);
}

.site-nav__link:hover::before{
  opacity:1;
  transform:scaleY(1);
}

.site-nav__link[aria-current="page"]{
  color:var(--primary);
  background:rgba(0,255,136,0.08);
  box-shadow:inset 0 0 0 1px rgba(0,255,136,0.12);
}

.site-nav__link[aria-current="page"]::before{
  opacity:1;
  transform:scaleY(1);
}

.site-header__meta{
  margin-top:auto;
  border-top:1px solid var(--border-line);
  padding-top:16px;
  display:flex;
  align-items:center;
  gap:10px;
}

.site-header__meta-text{
  font-family:var(--font-data);
  font-size:10px;
  letter-spacing:0.16em;
  color:var(--text-muted);
  text-transform:uppercase;
}

.site-footer{
  position:relative;
  overflow:hidden;
  background:var(--bg-deep);
  border-top:1px solid var(--border-line);
}

.site-footer::before{
  content:"";
  position:absolute;
  top:0;
  left:0;
  right:0;
  height:1px;
  background:linear-gradient(90deg, var(--primary), transparent 30%, var(--accent-violet) 70%, transparent);
  opacity:0.7;
}

.site-footer::after{
  content:"";
  position:absolute;
  top:0;
  right:0;
  width:42%;
  height:100%;
  background:repeating-linear-gradient(-45deg, rgba(0,255,136,0.03) 0 2px, transparent 2px 18px), linear-gradient(270deg, rgba(155,80,255,0.06), transparent 60%);
  pointer-events:none;
}

.site-footer__inner{
  position:relative;
  z-index:1;
}

.site-footer__grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.2fr;
  gap:clamp(24px,4vw,44px);
  padding:52px 0 36px;
}

.site-footer__brand{
  max-width:36em;
}

.site-footer__logo{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-head);
  font-weight:900;
  font-size:22px;
  letter-spacing:0.03em;
  color:var(--text-light);
  text-decoration:none;
}

.site-footer__logo::before{
  content:"";
  width:10px;
  height:22px;
  background:var(--primary);
  clip-path:polygon(0 0, 100% 0, 100% 100%, 0 82%);
  box-shadow:0 0 12px rgba(0,255,136,0.45);
}

.site-footer__note{
  margin:14px 0 0;
  color:var(--text-muted);
  font-size:14px;
  line-height:1.75;
}

.site-footer__note--tight{
  margin-top:8px;
  color:var(--text-muted);
  opacity:0.8;
  font-size:13px;
}

.site-footer__col{
  min-width:0;
}

.site-footer__title{
  font-family:var(--font-data);
  font-size:12px;
  letter-spacing:0.16em;
  text-transform:uppercase;
  color:var(--primary);
  margin:0 0 14px;
}

.site-footer__list{
  list-style:none;
  margin:0;
  padding:0;
  display:grid;
  gap:9px;
}

.site-footer__list li{
  color:var(--text-muted);
  font-size:14px;
  line-height:1.6;
}

.site-footer__list a{
  color:var(--text-muted);
  text-decoration:none;
  transition:color 0.2s;
}

.site-footer__list a:hover{
  color:var(--primary);
}

.site-footer__contact .site-footer__list{
  gap:11px;
}

.site-footer__bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px 14px;
  border-top:1px solid rgba(45,74,107,0.85);
  padding:18px 0 26px;
  color:var(--text-muted);
  font-size:13px;
}

.site-footer__bottom a{
  color:var(--text-muted);
  text-decoration:none;
  transition:color 0.2s;
}

.site-footer__bottom a:hover{
  color:var(--primary);
}

.site-footer__copy{
  color:var(--text-light);
}

.site-footer__sep{
  opacity:0.4;
}

.js [data-reveal]:not(.is-revealed){
  opacity:0;
  transform:translateY(18px);
}

[data-reveal]{
  transition:opacity 0.55s ease, transform 0.55s ease;
  will-change:opacity, transform;
}

.is-revealed{
  opacity:1;
  transform:none;
}

@media (max-width:899.98px){
  :root{
    --header-w:0px;
    --topbar-h:52px;
  }

  body{
    padding-left:0;
  }

  .topbar{
    padding:0 14px;
  }

  .topbar__status{
    display:none;
  }

  .nav-toggle{
    display:inline-flex;
  }

  .site-header{
    width:100%;
    height:auto;
    max-height:calc(100vh - var(--topbar-h));
    top:var(--topbar-h);
    border-right:0;
    border-bottom:1px solid var(--border-line);
    opacity:0;
    visibility:hidden;
    overflow-y:auto;
    transform:translateY(calc(-100% - var(--topbar-h)));
    transition:transform 0.3s ease, opacity 0.3s ease, visibility 0.3s;
  }

  .site-header[data-open]{
    transform:translateY(0);
    opacity:1;
    visibility:visible;
  }

  .site-header__inner{
    padding:20px 16px 24px;
    gap:20px;
  }

  .site-nav{
    flex:0 0 auto;
  }

  .site-nav__list{
    grid-template-columns:repeat(2, minmax(0,1fr));
    gap:6px;
  }

  .site-nav__link{
    padding:11px 10px;
    font-size:14px;
  }

  .site-header__meta{
    display:none;
  }

  .grid--3{
    grid-template-columns:repeat(2, minmax(0,1fr));
  }

  .site-footer__grid{
    grid-template-columns:1fr 1fr;
    gap:30px;
    padding:44px 0 28px;
  }
}

@media (max-width:620px){
  .grid--2,
  .grid--3{
    grid-template-columns:1fr;
  }

  .site-footer__grid{
    grid-template-columns:1fr;
  }

  .site-footer__bottom{
    justify-content:flex-start;
  }

  .topbar__label{
    display:none;
  }

  .topbar__brand{
    font-size:14px;
  }
}