:root{
  --ink:#06121F;
  --panel:#0D2033;
  --panel-deep:#08192B;
  --line:#1E3A52;
  --cyan:#35E0D6;
  --amber:#FFA23A;
  --violet:#8E7CFF;
  --forest:#0B3A36;
  --wine:#7A2E3E;
  --text:#F2F6F8;
  --muted:#93A9BC;
  --mono:ui-monospace,"JetBrains Mono","IBM Plex Mono",Menlo,Consolas,"Noto Sans Mono CJK SC",monospace;
  --sans:system-ui,"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --edge:clamp(18px,4vw,40px);
  --shell:1320px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --dur:220ms;
}

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

html{
  -webkit-text-size-adjust:100%;
  scroll-padding-top:104px;
  scroll-behavior:smooth;
}

body{
  margin:0;
  background-color:var(--ink);
  background-image:
    linear-gradient(to right,rgba(30,58,82,.30) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(30,58,82,.30) 1px,transparent 1px);
  background-size:64px 64px;
  background-attachment:fixed;
  color:var(--text);
  font-family:var(--sans);
  font-size:17px;
  line-height:1.7;
  letter-spacing:.01em;
}

h1,h2,h3,h4{
  margin:0;
  font-family:var(--mono);
  font-weight:600;
  line-height:1.24;
  letter-spacing:.005em;
}

h1{font-size:clamp(2.4rem,5vw,4.2rem)}
h2{font-size:clamp(1.5rem,2.6vw,2.1rem)}
h3{font-size:clamp(1.06rem,1.6vw,1.24rem)}

p{margin:0 0 1em}
p:last-child{margin-bottom:0}
ul,ol{margin:0;padding:0}
img,svg{max-width:100%;display:block}
a{color:var(--cyan);text-decoration:none}
a:hover{color:var(--text)}
button{font:inherit;color:inherit}

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

.skip-link{
  position:absolute;
  left:var(--edge);
  top:-120px;
  z-index:200;
  padding:10px 18px;
  background:var(--cyan);
  color:#04141A;
  font:600 12px/1 var(--mono);
  letter-spacing:.14em;
  transition:top 180ms var(--ease);
}
.skip-link:focus{top:12px;color:#04141A}

/* ============ HEADER ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:120;
  background:var(--ink);
  border-bottom:1px solid var(--line);
}

.header-shell{
  max-width:var(--shell);
  margin:0 auto;
  padding:0 var(--edge);
  min-height:78px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:clamp(16px,3vw,48px);
}

.header-brand{
  display:flex;
  flex-direction:column;
  gap:4px;
  padding:14px 0;
  flex:0 0 auto;
  color:var(--text);
  text-decoration:none;
}
.header-brand:hover .brand-name{color:var(--cyan)}

.brand-code{
  font:600 10px/1 var(--mono);
  letter-spacing:.24em;
  color:var(--cyan);
}
.brand-name{
  font:600 20px/1.1 var(--mono);
  letter-spacing:.04em;
  transition:color var(--dur) var(--ease);
}
.brand-sub{
  font:400 12px/1.3 var(--sans);
  letter-spacing:.06em;
  color:var(--muted);
}

.nav-toggle{
  display:none;
  align-items:center;
  gap:10px;
  padding:10px 14px;
  background:transparent;
  border:1px solid var(--line);
  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-text{
  font:600 11px/1 var(--mono);
  letter-spacing:.18em;
  text-transform:uppercase;
}
.nav-toggle-icon{
  display:flex;
  flex-direction:column;
  gap:4px;
  width:16px;
}
.nav-toggle-icon i{
  display:block;
  height:1px;
  background:currentColor;
  transition:transform var(--dur) var(--ease),opacity var(--dur) var(--ease);
}
.site-header[data-open] .nav-toggle-icon i:first-child{transform:translateY(2.5px) rotate(45deg)}
.site-header[data-open] .nav-toggle-icon i:last-child{transform:translateY(-2.5px) rotate(-45deg)}

.site-nav{
  display:flex;
  align-items:center;
  gap:clamp(12px,2.2vw,34px);
  margin-left:auto;
}

.nav-list{
  display:flex;
  align-items:center;
  gap:clamp(4px,1.1vw,16px);
  list-style:none;
}
.nav-item{list-style:none}

.nav-link{
  display:flex;
  flex-direction:column;
  gap:4px;
  padding:12px 6px;
  color:var(--muted);
  border-bottom:2px solid transparent;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.nav-link:hover{color:var(--text);border-bottom-color:var(--cyan)}
.nav-link[aria-current="page"]{
  color:var(--text);
  border-bottom-color:var(--cyan);
}
.nav-link[aria-current="page"] .nav-code{color:var(--cyan)}

.nav-code{
  font:600 10px/1 var(--mono);
  letter-spacing:.2em;
  color:var(--muted);
  transition:color var(--dur) var(--ease);
}
.nav-link:hover .nav-code{color:var(--cyan)}
.nav-label{
  font:500 14px/1.2 var(--sans);
  letter-spacing:.02em;
  white-space:nowrap;
}

.nav-actions{
  display:flex;
  align-items:center;
  gap:10px;
  padding-left:clamp(8px,1.6vw,22px);
  border-left:1px solid var(--line);
}

.scroll-progress{
  position:absolute;
  left:0;
  bottom:-1px;
  width:100%;
  height:2px;
  background:var(--cyan);
  transform:scaleX(0);
  transform-origin:0 50%;
  opacity:.9;
  pointer-events:none;
}

/* ============ BUTTONS ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:11px 18px;
  border:1px solid transparent;
  border-radius:0;
  font:600 13px/1 var(--sans);
  letter-spacing:.04em;
  text-decoration:none;
  white-space:nowrap;
  cursor:pointer;
  transition:background var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.btn-primary{
  background:var(--amber);
  border-color:var(--amber);
  color:#1B0E00;
}
.btn-primary:hover{background:#FFBB6E;border-color:#FFBB6E;color:#1B0E00}
.btn-ghost{
  background:transparent;
  border-color:var(--line);
  color:var(--text);
}
.btn-ghost:hover{border-color:var(--cyan);color:var(--cyan)}

/* ============ FOOTER ============ */
.site-footer{
  margin-top:clamp(48px,8vw,120px);
  background:var(--panel-deep);
  border-top:1px solid var(--line);
}
.footer-shell{
  max-width:var(--shell);
  margin:0 auto;
  padding:clamp(36px,6vw,72px) var(--edge) 26px;
}
.footer-top{
  display:grid;
  grid-template-columns:minmax(0,1.5fr) minmax(0,1.5fr) minmax(0,1fr);
  gap:clamp(24px,4vw,60px);
  padding-bottom:clamp(26px,4vw,44px);
  border-bottom:1px solid var(--line);
}
.footer-brand{
  display:flex;
  flex-direction:column;
  gap:10px;
  align-items:flex-start;
}
.footer-brand-name{
  font:600 19px/1.2 var(--mono);
  letter-spacing:.04em;
  color:var(--text);
}
.footer-intro{
  font-size:15px;
  line-height:1.7;
  color:var(--muted);
  max-width:44ch;
  margin:0;
}
.footer-note{
  font:400 12px/1.6 var(--mono);
  letter-spacing:.04em;
  color:var(--cyan);
  opacity:.78;
  margin:0;
}
.footer-cols{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:clamp(18px,3vw,36px);
}
.footer-col-title{
  margin:0 0 14px;
  font:600 11px/1 var(--mono);
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--amber);
}
.footer-list{
  list-style:none;
  display:flex;
  flex-direction:column;
  gap:9px;
}
.footer-link{
  font-size:15px;
  color:var(--muted);
  border-bottom:1px solid transparent;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.footer-link:hover{color:var(--cyan);border-bottom-color:var(--line)}

.footer-contact{display:flex;flex-direction:column}
.contact-list{
  list-style:none;
  display:flex;
  flex-direction:column;
  gap:14px;
}
.contact-item{display:flex;flex-direction:column;gap:4px}
.contact-label{
  font:600 10px/1 var(--mono);
  letter-spacing:.2em;
  color:var(--muted);
}
.contact-value{
  font-size:14px;
  line-height:1.6;
  color:var(--text);
  word-break:break-word;
}

.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:14px 24px;
  padding-top:22px;
}
.footer-legal{
  display:flex;
  flex-wrap:wrap;
  gap:8px 20px;
  list-style:none;
}
.legal-link{
  font:500 12px/1 var(--mono);
  letter-spacing:.1em;
  color:var(--muted);
  transition:color var(--dur) var(--ease);
}
.legal-link:hover{color:var(--cyan)}
.footer-meta{
  display:flex;
  flex-wrap:wrap;
  gap:6px 20px;
  margin:0;
  font:400 12px/1.5 var(--mono);
  letter-spacing:.08em;
  color:var(--muted);
}
.footer-icp{color:var(--muted)}
.footer-copy{color:var(--muted)}

/* ============ LAYOUT ============ */
.container{
  width:100%;
  max-width:var(--shell);
  margin:0 auto;
  padding:0 var(--edge);
}
.container-narrow{max-width:860px}

.section{padding:clamp(40px,6vw,80px) 0}
.section-head{
  display:flex;
  flex-direction:column;
  gap:10px;
  margin-bottom:clamp(20px,3vw,34px);
}
.section-code{
  font:600 11px/1 var(--mono);
  letter-spacing:.24em;
  color:var(--amber);
  text-transform:uppercase;
}
.section-title{color:var(--text)}
.section-lede{
  max-width:62ch;
  font-size:16px;
  color:var(--muted);
  margin:0;
}

.rule{
  height:1px;
  border:0;
  margin:0;
  background:var(--line);
}

.prose{
  max-width:70ch;
  font-size:17px;
  line-height:1.7;
}
.prose h2{margin:2em 0 .6em}
.prose h3{margin:1.6em 0 .5em}
.prose ul,.prose ol{padding-left:1.3em;margin:0 0 1em}
.prose li{margin-bottom:.45em}

.panel{
  background:var(--panel);
  border:1px solid var(--line);
  padding:clamp(18px,3vw,28px);
}

.stat-panel{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(150px,1fr));
  gap:1px;
  background:var(--line);
  border:1px solid var(--line);
}
.stat-item{
  background:var(--panel);
  padding:18px 20px;
  display:flex;
  flex-direction:column;
  gap:6px;
}
.stat-value{
  font:600 26px/1 var(--mono);
  letter-spacing:.02em;
  color:var(--cyan);
}
.stat-label{
  font:600 10px/1.4 var(--mono);
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--muted);
}

/* ============ CARDS ============ */
.card-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(238px,1fr));
  gap:1px;
  background:var(--line);
  border:1px solid var(--line);
}
.info-card{
  position:relative;
  display:flex;
  flex-direction:column;
  gap:9px;
  padding:22px 20px 24px;
  background:var(--panel);
  color:var(--text);
  text-decoration:none;
  transition:background var(--dur) var(--ease);
}
.info-card::before{
  content:"";
  position:absolute;
  inset:0 0 auto 0;
  height:2px;
  background:var(--card-accent,var(--cyan));
  opacity:.5;
  transition:opacity var(--dur) var(--ease);
}
.info-card:hover{background:#10263E;color:var(--text)}
.info-card:hover::before{opacity:1}
.info-card[data-accent="amber"]{--card-accent:var(--amber)}
.info-card[data-accent="violet"]{--card-accent:var(--violet)}
.info-card[data-accent="forest"]{--card-accent:#1C8C7E}
.info-card[data-accent="wine"]{--card-accent:#B4526A}

.card-code{
  font:600 11px/1 var(--mono);
  letter-spacing:.2em;
  color:var(--muted);
}
.card-title{
  font:600 16px/1.35 var(--mono);
  color:var(--text);
}
.card-text{
  font-size:14px;
  line-height:1.65;
  color:var(--muted);
  margin:0;
}

/* ============ INDEX TREE ============ */
.index-tree{
  border:1px solid var(--line);
  background:var(--panel);
}
.tree-group{border-bottom:1px solid var(--line)}
.tree-group:last-child{border-bottom:0}
.tree-head{
  display:flex;
  align-items:center;
  gap:10px;
  width:100%;
  padding:13px 16px;
  background:transparent;
  border:0;
  text-align:left;
  cursor:pointer;
  color:var(--text);
  font:600 13px/1 var(--mono);
  letter-spacing:.08em;
  transition:color var(--dur) var(--ease),background var(--dur) var(--ease);
}
.tree-head:hover{color:var(--cyan);background:rgba(53,224,214,.05)}
.tree-badge{
  font:600 11px/1 var(--mono);
  letter-spacing:.16em;
  color:var(--cyan);
  min-width:24px;
}
.tree-name{flex:1 1 auto}
.tree-caret{
  flex:0 0 auto;
  color:var(--muted);
  transition:transform var(--dur) var(--ease),color var(--dur) var(--ease);
}
.tree-group[data-open] .tree-caret{transform:rotate(90deg);color:var(--cyan)}
.tree-list{
  display:none;
  list-style:none;
  padding:0 0 12px;
}
.tree-group[data-open] .tree-list{display:block}
.tree-link{
  display:flex;
  align-items:baseline;
  gap:10px;
  padding:8px 16px 8px 28px;
  border-left:2px solid transparent;
  color:var(--muted);
  font-size:14px;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease),background var(--dur) var(--ease);
}
.tree-link:hover{
  color:var(--text);
  border-left-color:var(--cyan);
  background:rgba(53,224,214,.06);
}
.tree-code{
  font:600 11px/1.4 var(--mono);
  letter-spacing:.12em;
  color:var(--cyan);
}
.tree-name-text{flex:1 1 auto}

/* ============ STATUS / TAG ============ */
.status{
  display:inline-flex;
  align-items:center;
  gap:7px;
  font:600 10px/1 var(--mono);
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--muted);
}
.status::before{
  content:"";
  width:6px;
  height:6px;
  border-radius:50%;
  background:var(--muted);
  flex:0 0 auto;
}
.status[data-state="live"]{color:var(--cyan)}
.status[data-state="live"]::before{background:var(--cyan);box-shadow:0 0 0 3px rgba(53,224,214,.16)}
.status[data-state="pending"]{color:var(--amber)}
.status[data-state="pending"]::before{background:var(--amber)}
.status[data-state="archive"]{color:var(--violet)}
.status[data-state="archive"]::before{background:var(--violet)}
.status[data-state="idle"]{color:var(--muted)}

.tag{
  display:inline-flex;
  align-items:center;
  padding:3px 9px;
  border:1px solid var(--line);
  font:600 11px/1.4 var(--mono);
  letter-spacing:.1em;
  color:var(--muted);
  text-transform:uppercase;
}

/* ============ BREADCRUMB ============ */
.breadcrumb{padding:0}
.breadcrumb-list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
  list-style:none;
  font:600 11px/1.6 var(--mono);
  letter-spacing:.14em;
  text-transform:uppercase;
}
.breadcrumb-list li+li::before{
  content:"/";
  margin-right:10px;
  color:var(--line);
}
.breadcrumb-link{color:var(--muted)}
.breadcrumb-link:hover{color:var(--cyan)}
.breadcrumb-current{color:var(--text)}

/* ============ MEDIA ============ */
.media-frame{
  position:relative;
  display:block;
  width:100%;
  aspect-ratio:16/9;
  overflow:hidden;
  background:var(--panel);
  border:1px solid var(--line);
}
.media-frame img{
  width:100%;
  height:100%;
  object-fit:cover;
}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--tall{aspect-ratio:4/5}
.media-frame--square{aspect-ratio:1/1}
.media-figure{
  display:flex;
  flex-direction:column;
  gap:10px;
  margin:0;
}
.media-caption{
  font:400 12px/1.6 var(--mono);
  letter-spacing:.06em;
  color:var(--muted);
}

/* ============ REVEAL ============ */
[data-reveal]{
  transition:opacity 260ms var(--ease),transform 260ms var(--ease);
}
[data-reveal].reveal-pending{
  opacity:0;
  transform:translateY(12px);
}

/* ============ BREAKPOINTS ============ */
@media (max-width:1080px){
  .nav-toggle{display:inline-flex}
  .site-nav{
    position:absolute;
    top:100%;
    left:0;
    right:0;
    display:block;
    margin:0;
    padding:8px var(--edge) 22px;
    background:var(--panel);
    border-top:1px solid var(--line);
    border-bottom:1px solid var(--line);
    max-height:0;
    overflow:hidden;
    visibility:hidden;
    transition:max-height 280ms var(--ease),visibility 280ms var(--ease);
  }
  .site-header[data-open] .site-nav{
    max-height:82vh;
    overflow-y:auto;
    visibility:visible;
  }
  .nav-list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
    width:100%;
  }
  .nav-link{
    flex-direction:row;
    align-items:center;
    gap:14px;
    padding:14px 10px;
    border-bottom:1px solid var(--line);
    border-left:2px solid transparent;
  }
  .nav-link:hover{border-bottom-color:var(--line);border-left-color:var(--cyan)}
  .nav-link[aria-current="page"]{
    border-bottom-color:var(--line);
    border-left-color:var(--cyan);
  }
  .nav-code{min-width:26px}
  .nav-actions{
    flex-direction:column;
    align-items:stretch;
    gap:10px;
    padding:18px 0 0;
    border-left:0;
    border-top:1px solid var(--line);
  }
  .nav-actions .btn{width:100%}
}

@media (max-width:900px){
  .footer-top{
    grid-template-columns:minmax(0,1fr) minmax(0,1fr);
  }
  .footer-contact{grid-column:1 / -1}
  .contact-list{flex-direction:row;flex-wrap:wrap;gap:14px 40px}
}

@media (max-width:640px){
  body{font-size:16px}
  .header-shell{min-height:66px}
  .brand-name{font-size:17px}
  .brand-sub{font-size:11px}
  .footer-top{grid-template-columns:minmax(0,1fr)}
  .footer-cols{grid-template-columns:1fr 1fr}
  .contact-list{flex-direction:column;gap:14px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .card-grid{grid-template-columns:minmax(0,1fr)}
  .stat-panel{grid-template-columns:1fr 1fr}
}

@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].reveal-pending{opacity:1;transform:none}
  .scroll-progress{transition:none}
}