:root{
  --navy:#0C1B3A;
  --navy-alt:#132A4E;
  --accent:#FF6A00;
  --accent-soft:#FFB36B;
  --silver:#B7C0CC;
  --paper:#F4F0E6;
  --ink:#0A111E;
  --moss:#5F7A61;
  --clay:#B85C38;
  --slate:#6D7A8A;
  --line:#DCE1E8;
  --white:#F7F9FC;
  --shell:1280px;
  --space:clamp(1rem,4vw,2rem);
  --radius:10px;
  --radius-sm:6px;
  --fs-display:clamp(2.4rem,6vw,4.5rem);
  --fs-title:clamp(1.6rem,3.6vw,2.6rem);
  --fs-head:1.15rem;
  --font-display:"Noto Sans SC","DIN Alternate","Arial Narrow","PingFang SC",sans-serif;
  --font-body:"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-mono:"JetBrains Mono","SFMono-Regular",Consolas,"Liberation Mono",monospace;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-body);
  background:var(--paper);
  color:var(--ink);
  line-height:1.8;
  min-width:320px;
  -webkit-font-smoothing:antialiased;
}
body.nav-open{overflow:hidden}
h1,h2,h3,h4,h5,p,figure,blockquote,dl,dd{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;border:0;cursor:pointer}
[hidden]{display:none!important}
:focus-visible{outline:3px solid var(--accent);outline-offset:2px}
::selection{background:var(--accent);color:var(--ink)}
#main-content{display:block}

.t-display{font-family:var(--font-display);font-weight:900;font-size:var(--fs-display);line-height:1.05;letter-spacing:-.02em}
.t-title{font-family:var(--font-display);font-weight:900;font-size:var(--fs-title);line-height:1.12;letter-spacing:-.02em}
.t-head{font-family:var(--font-display);font-weight:900;font-size:var(--fs-head);letter-spacing:-.01em}
.t-kicker{font-family:var(--font-mono);font-size:.78rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--clay)}
.t-mono{font-family:var(--font-mono);font-size:.875rem}
.t-muted{color:var(--slate)}

.skip-link{
  position:fixed;
  top:.75rem;
  left:.75rem;
  z-index:3000;
  background:var(--accent);
  color:var(--ink);
  padding:.6rem 1.1rem;
  border-radius:var(--radius-sm);
  font-weight:900;
  font-size:.9rem;
  transform:translateY(-220%);
  transition:transform .2s;
}
.skip-link:focus{transform:translateY(0)}

.reading-progress{
  position:fixed;
  top:0;
  left:0;
  right:0;
  height:3px;
  z-index:2000;
  pointer-events:none;
}
.reading-progress__bar{
  display:block;
  height:100%;
  width:100%;
  background:linear-gradient(90deg,var(--accent),var(--accent-soft));
  transform:scaleX(0);
  transform-origin:left;
}

.site-header{
  position:relative;
  background:var(--navy);
  color:var(--white);
}
.alert-strip{
  display:flex;
  align-items:center;
  justify-content:center;
  gap:.75rem;
  flex-wrap:wrap;
  background:var(--accent);
  color:var(--ink);
  padding:.35rem 1rem;
  font-size:.78rem;
  font-weight:900;
  letter-spacing:.02em;
}
.alert-strip__route{
  text-decoration:underline;
  text-underline-offset:2px;
  white-space:nowrap;
}
.command-bar{
  display:flex;
  align-items:center;
  gap:1.25rem;
  max-width:var(--shell);
  margin-inline:auto;
  padding:.85rem var(--space);
}
.brand-block{
  display:flex;
  align-items:center;
  gap:.7rem;
  min-width:0;
}
.brand-block__mark{
  width:42px;
  height:42px;
  flex:none;
  display:grid;
  place-items:center;
  background:var(--accent);
  color:var(--ink);
  font-weight:900;
  font-size:1.15rem;
  border-radius:8px 8px 8px 2px;
  box-shadow:0 4px 14px rgba(255,106,0,.25);
}
.brand-block__text{
  display:grid;
  line-height:1.15;
}
.brand-block__name{
  font-family:var(--font-display);
  font-weight:900;
  font-size:1.05rem;
  letter-spacing:-.02em;
}
.brand-block__strap{
  font-family:var(--font-mono);
  font-size:.68rem;
  letter-spacing:.08em;
  color:var(--silver);
  text-transform:uppercase;
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}
.quick-nav{
  display:flex;
  align-items:center;
  gap:.3rem;
}
.quick-nav a{
  font-family:var(--font-mono);
  font-size:.78rem;
  font-weight:700;
  color:var(--silver);
  padding:.35rem .6rem;
  border-radius:4px;
}
.quick-nav a:hover{
  color:#fff;
  background:rgba(255,255,255,.08);
}
.quick-nav a[aria-current="page"]{
  color:#fff;
  background:rgba(255,255,255,.1);
}
.command-bar__action{
  margin-left:auto;
  display:flex;
  align-items:center;
  gap:1rem;
}
.command-bar__status{
  display:inline-flex;
  align-items:center;
  gap:.5rem;
  font-size:.8rem;
  color:var(--silver);
}
.command-bar__cta{
  display:inline-flex;
  align-items:center;
  gap:.45rem;
  background:var(--accent);
  color:var(--ink);
  font-weight:900;
  font-size:.85rem;
  padding:.55em 1em;
  border-radius:999px;
  letter-spacing:.02em;
  transition:background .2s,transform .2s;
  white-space:nowrap;
}
.command-bar__cta:hover{
  background:var(--accent-soft);
  transform:translateY(-1px);
}
.nav-toggle{
  display:none;
  flex:none;
  align-items:center;
  gap:.5rem;
  background:transparent;
  border:1px solid rgba(255,255,255,.18);
  border-radius:8px;
  padding:.55rem .7rem;
  color:var(--white);
}
.nav-toggle span{
  display:block;
  width:18px;
  height:2px;
  background:currentColor;
  border-radius:2px;
  transition:transform .2s;
}
.nav-toggle span+span{margin-top:4px}
.nav-toggle[aria-expanded="true"] span:first-child{transform:translateY(3px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:last-child{transform:rotate(-45deg)}

.site-nav{
  background:rgba(255,255,255,.04);
}
.nav-list{
  max-width:var(--shell);
  margin-inline:auto;
  display:flex;
  flex-wrap:wrap;
  gap:.15rem;
  padding:0 var(--space);
}
.nav-list a{
  display:block;
  padding:.65rem .9rem;
  color:var(--silver);
  font-weight:700;
  font-size:.88rem;
  white-space:nowrap;
  border-bottom:2px solid transparent;
  transition:color .2s,background .2s;
}
.nav-list a:hover{
  color:#fff;
  background:rgba(255,255,255,.05);
}
.nav-list a[aria-current="page"]{
  color:#fff;
  border-bottom-color:var(--accent);
}

.status-dot{
  display:inline-block;
  width:8px;
  height:8px;
  border-radius:50%;
  background:var(--moss);
  box-shadow:0 0 0 3px rgba(95,122,97,.16);
}
.status-dot--accent{
  background:var(--accent);
  box-shadow:0 0 0 3px rgba(255,106,0,.16);
}

.page-shell{
  max-width:var(--shell);
  margin-inline:auto;
  padding:var(--space);
}
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  gap:.5rem;
  font-family:var(--font-mono);
  font-size:.8rem;
  color:var(--slate);
  margin-top:.75rem;
}
.breadcrumb a{color:var(--navy)}
.breadcrumb a[aria-current]{color:var(--clay)}
.breadcrumb li+li::before{
  content:"/";
  color:var(--line);
  margin-right:.5rem;
}

.hero-cover{
  position:relative;
  background:var(--navy);
  color:var(--white);
  overflow:hidden;
}
.hero-cover::before{
  content:"";
  position:absolute;
  top:-10%;
  right:-10%;
  width:48vw;
  height:48vw;
  border-radius:50%;
  background:radial-gradient(circle,rgba(255,106,0,.2),transparent 60%);
  pointer-events:none;
}
.hero-cover::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  height:4px;
  background:repeating-linear-gradient(90deg,var(--accent) 0 20px,transparent 20px 36px);
  opacity:.8;
}
.hero-cover__shell{
  position:relative;
  max-width:var(--shell);
  margin-inline:auto;
  padding:clamp(3rem,8vw,6rem) var(--space);
}
.hero-cover__kicker{
  font-family:var(--font-mono);
  font-size:.78rem;
  letter-spacing:.16em;
  color:var(--accent-soft);
  text-transform:uppercase;
  display:flex;
  align-items:center;
  gap:.6rem;
}
.hero-cover__kicker::before{
  content:"";
  width:28px;
  height:2px;
  background:var(--accent);
}
.hero-cover__title{
  font-family:var(--font-display);
  font-weight:900;
  font-size:var(--fs-display);
  line-height:1.04;
  letter-spacing:-.02em;
  margin-top:.6rem;
  max-width:15ch;
}
.hero-cover__lede{
  max-width:58ch;
  color:var(--silver);
  margin-top:1.1rem;
  font-size:1.05rem;
}
.hero-cover__meta{
  display:flex;
  flex-wrap:wrap;
  gap:.75rem 1.5rem;
  font-family:var(--font-mono);
  font-size:.78rem;
  color:var(--silver);
  margin-top:1.5rem;
}

.section-head{
  display:grid;
  gap:.5rem;
  max-width:56ch;
}
.section-head__kicker{
  font-family:var(--font-mono);
  font-size:.75rem;
  font-weight:700;
  letter-spacing:.14em;
  color:var(--clay);
  text-transform:uppercase;
  display:flex;
  align-items:center;
  gap:.6rem;
}
.section-head__kicker::before{
  content:"";
  width:28px;
  height:2px;
  background:var(--accent);
}
.section-head__title{
  font-family:var(--font-display);
  font-weight:900;
  font-size:var(--fs-title);
  letter-spacing:-.02em;
  line-height:1.1;
}
.section-head__desc{
  color:var(--slate);
}
.section-head--light .section-head__title{color:var(--white)}
.section-head--light .section-head__desc{color:var(--silver)}

.bento-grid{
  display:grid;
  grid-template-columns:repeat(12,1fr);
  gap:clamp(.75rem,1.5vw,1.25rem);
}
.bento-cell{min-width:0}
.bento-cell--span-12{grid-column:span 12}
.bento-cell--span-8{grid-column:span 8}
.bento-cell--span-7{grid-column:span 7}
.bento-cell--span-6{grid-column:span 6}
.bento-cell--span-5{grid-column:span 5}
.bento-cell--span-4{grid-column:span 4}
.bento-cell--span-3{grid-column:span 3}

.panel{
  position:relative;
  background:var(--paper);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:clamp(1.2rem,3vw,2rem);
  box-shadow:0 1px 2px rgba(12,27,58,.06);
  height:100%;
}
.panel--navy{
  background:var(--navy);
  color:var(--white);
  border-color:transparent;
}
.panel--dark{
  background:var(--navy-alt);
  color:var(--white);
  border-color:transparent;
}
.panel--accent{
  background:var(--accent);
  color:var(--ink);
  border-color:transparent;
}
.panel--paper{
  background:#fff;
  color:var(--ink);
  border-color:var(--line);
}
.panel__tag{
  font-family:var(--font-mono);
  font-size:.72rem;
  font-weight:700;
  letter-spacing:.12em;
  color:var(--clay);
  text-transform:uppercase;
  display:block;
  margin-bottom:.5rem;
}
.panel--navy .panel__tag,
.panel--dark .panel__tag{color:var(--accent-soft)}
.panel__title{
  font-family:var(--font-display);
  font-weight:900;
  font-size:1.35rem;
  line-height:1.2;
  letter-spacing:-.02em;
}
.panel__desc{
  color:var(--slate);
  margin-top:.55rem;
  font-size:.92rem;
}
.panel--navy .panel__desc,
.panel--dark .panel__desc{color:var(--silver)}
.panel__meta{
  font-family:var(--font-mono);
  font-size:.75rem;
  color:var(--slate);
  margin-top:.6rem;
}
.panel--navy .panel__meta,
.panel--dark .panel__meta{color:var(--silver)}
.panel__link{
  display:inline-flex;
  align-items:center;
  gap:.4rem;
  font-weight:900;
  color:var(--navy);
  margin-top:1rem;
  font-size:.9rem;
}
.panel__link::after{
  content:"→";
  transition:transform .2s;
}
.panel__link:hover::after{transform:translateX(3px)}
.panel--navy .panel__link,
.panel--dark .panel__link{color:var(--accent-soft)}

.index-list{
  display:grid;
  gap:.5rem;
}
.index-list li{
  border-bottom:1px solid var(--line);
  padding:.7rem 0 .9rem;
}
.index-list li:last-child{border-bottom:0}
.index-list__head{
  display:flex;
  justify-content:space-between;
  gap:1rem;
  align-items:baseline;
}
.index-list__head strong{
  font-family:var(--font-display);
  font-weight:900;
  font-size:1rem;
  letter-spacing:-.01em;
  color:var(--navy);
}
.index-list__date{
  font-family:var(--font-mono);
  font-size:.72rem;
  color:var(--slate);
  white-space:nowrap;
}
.index-list__desc{
  color:var(--slate);
  font-size:.88rem;
  margin-top:.2rem;
}
.index-list--dark li{border-color:rgba(255,255,255,.12)}
.index-list--dark .index-list__head strong{color:#fff}
.index-list--dark .index-list__desc,
.index-list--dark .index-list__date{color:var(--silver)}
.index-list--dense li{padding:.4rem 0 .6rem}

.path-table{
  width:100%;
  border-collapse:collapse;
  font-size:.88rem;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius);
  overflow:hidden;
}
.path-table th,
.path-table td{
  text-align:left;
  padding:.7rem .9rem;
  border-bottom:1px solid var(--line);
}
.path-table th{
  background:var(--navy);
  color:#fff;
  font-family:var(--font-mono);
  font-size:.75rem;
  letter-spacing:.06em;
  text-transform:uppercase;
}
.path-table tr:last-child td{border-bottom:0}
.path-table td code{
  font-family:var(--font-mono);
  background:rgba(12,27,58,.06);
  padding:.15em .4em;
  border-radius:4px;
}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.5rem;
  background:var(--navy);
  color:#fff;
  font-weight:900;
  font-size:.9rem;
  padding:.7em 1.25em;
  border-radius:8px;
  border:1px solid transparent;
  transition:background .2s,transform .2s;
}
.btn:hover{
  background:var(--navy-alt);
  transform:translateY(-1px);
}
.btn--primary{
  background:var(--accent);
  color:var(--ink);
}
.btn--primary:hover{
  background:var(--accent-soft);
}
.btn--ghost{
  background:transparent;
  border-color:var(--line);
  color:var(--ink);
}
.btn--ghost:hover{
  border-color:var(--navy);
  background:rgba(12,27,58,.04);
}

.callout{
  border-left:4px solid var(--accent);
  background:var(--line);
  padding:1rem 1.2rem;
  border-radius:0 8px 8px 0;
  font-size:.92rem;
}
.callout--navy{
  background:var(--navy);
  color:var(--white);
  border-color:var(--accent);
}
.callout--paper{
  background:#fff;
  border-color:var(--clay);
}

.tag{
  display:inline-flex;
  align-items:center;
  gap:.3rem;
  background:var(--line);
  color:var(--ink);
  border-radius:999px;
  padding:.2em .8em;
  font-size:.75rem;
  font-weight:900;
}
.tag--new{
  background:rgba(95,122,97,.15);
  color:var(--moss);
}
.tag--accent{
  background:var(--accent);
  color:var(--ink);
}
.version-chip{
  display:inline-flex;
  align-items:center;
  gap:.4rem;
  font-family:var(--font-mono);
  font-size:.78rem;
  background:#fff;
  border:1px solid var(--line);
  border-radius:6px;
  padding:.2rem .65rem;
  color:var(--ink);
}
.version-chip::before{
  content:"";
  width:6px;
  height:6px;
  border-radius:50%;
  background:var(--moss);
}
.version-chip--new::before{
  background:var(--accent);
}

.image-frame{
  position:relative;
  background:linear-gradient(135deg,var(--navy-alt),var(--navy));
  color:var(--silver);
  border-radius:var(--radius);
  min-height:200px;
  display:grid;
  place-items:center;
  overflow:hidden;
}
.image-frame::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:28px 28px;
}
.image-frame::after{
  content:"";
  position:absolute;
  inset:0;
  background:radial-gradient(circle at 78% 22%,rgba(255,106,0,.22),transparent 38%);
  pointer-events:none;
}
.image-frame > *{
  position:relative;
  z-index:1;
}
.image-frame--paper{
  background:linear-gradient(135deg,#fff,var(--paper));
  color:var(--slate);
  border:1px solid var(--line);
}
.image-frame--paper::before{
  background-image:linear-gradient(rgba(12,27,58,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(12,27,58,.06) 1px,transparent 1px);
}
.image-frame--cut{
  clip-path:polygon(0 0,calc(100% - 28px) 0,100% 28px,100% 100%,0 100%);
}
.svg-visual{
  width:100%;
  height:auto;
  display:block;
}

.prose{
  max-width:70ch;
  font-size:1rem;
  line-height:1.9;
}
.prose h2{
  font-family:var(--font-display);
  font-weight:900;
  font-size:1.4rem;
  letter-spacing:-.01em;
  margin:2.4em 0 .8em;
  padding-top:.6em;
  border-top:2px solid var(--line);
}
.prose p{
  margin-bottom:1.2em;
}
.prose a{
  text-decoration:underline;
  text-underline-offset:3px;
  text-decoration-color:var(--accent);
  font-weight:700;
}
.prose ul,
.prose ol{
  margin-bottom:1.2em;
  padding-left:1.4rem;
}
.prose ul{list-style:disc}
.prose ol{list-style:decimal}
.prose li{margin:.4em 0}
.prose strong{font-weight:900}

.print-rule{
  border:0;
  height:2px;
  background:repeating-linear-gradient(90deg,var(--line) 0 10px,transparent 10px 18px);
  margin:2rem 0;
}

.site-footer{
  position:relative;
  background:var(--navy);
  color:var(--white);
  margin-top:clamp(3rem,7vw,6rem);
  overflow:hidden;
}
.site-footer::before{
  content:"";
  position:absolute;
  top:-140px;
  right:-80px;
  width:360px;
  height:360px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(255,106,0,.16),transparent 65%);
  pointer-events:none;
}
.site-footer__main{
  position:relative;
  max-width:var(--shell);
  margin-inline:auto;
  padding:clamp(2.5rem,6vw,4.5rem) var(--space) 2.5rem;
  display:grid;
  gap:2rem;
}
.site-footer__main > div{
  min-width:0;
}
.footer-head{
  font-family:var(--font-display);
  font-weight:900;
  font-size:.78rem;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--accent-soft);
  margin-bottom:1rem;
}
.footer-about__brand{
  font-family:var(--font-display);
  font-weight:900;
  font-size:1.4rem;
  letter-spacing:-.02em;
}
.footer-about__desc{
  color:var(--silver);
  font-size:.9rem;
  max-width:42ch;
  margin-top:.6rem;
}
.footer-index ul,
.footer-legal ul{
  display:grid;
  gap:.5rem;
}
.site-footer a{
  color:var(--silver);
  transition:color .2s;
}
.site-footer a:hover{
  color:var(--accent-soft);
}
.footer-contact address{
  font-style:normal;
  display:grid;
  gap:.4rem;
  color:var(--silver);
  font-size:.9rem;
}
.site-footer__meta{
  position:relative;
  max-width:var(--shell);
  margin-inline:auto;
  padding:1.25rem var(--space);
  border-top:1px solid rgba(255,255,255,.12);
  display:flex;
  flex-wrap:wrap;
  gap:.6rem 1.5rem;
  align-items:center;
  color:var(--silver);
  font-size:.78rem;
}
.footer-meta__copy,
.footer-meta__icp{
  font-family:var(--font-mono);
}
.footer-meta__links{
  display:flex;
  flex-wrap:wrap;
  gap:.75rem 1rem;
}

.to-top{
  position:fixed;
  right:1.25rem;
  bottom:1.25rem;
  z-index:1500;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  background:var(--navy);
  color:var(--white);
  border:1px solid var(--line);
  padding:.7rem 1rem;
  border-radius:40px;
  font-size:.8rem;
  font-weight:900;
  box-shadow:0 10px 24px rgba(12,27,58,.25);
}
.to-top:hover{
  background:var(--accent);
  color:var(--ink);
}

@media (min-width:720px){
  .site-footer__main{
    grid-template-columns:1.6fr .9fr .9fr 1.2fr;
  }
  .site-footer__meta{
    justify-content:space-between;
  }
}

@media (max-width:860px){
  .quick-nav{
    display:none;
  }
  .nav-toggle{
    display:inline-flex;
  }
  .site-nav{
    display:none;
  }
  .site-nav[data-open="true"]{
    display:block;
    position:absolute;
    top:100%;
    left:0;
    right:0;
    z-index:1200;
    background:var(--navy);
    box-shadow:0 18px 30px rgba(12,27,58,.25);
    animation:nav-drop .18s ease;
  }
  .nav-list{
    display:grid;
    gap:0;
    padding:.5rem var(--space) 1rem;
  }
  .nav-list a{
    padding:.9rem .25rem;
    border-bottom:1px solid rgba(255,255,255,.1);
    border-radius:0;
    font-size:1rem;
  }
  .nav-list a[aria-current="page"]{
    color:var(--accent);
    border-bottom:1px solid rgba(255,255,255,.1);
  }
}

@keyframes nav-drop{
  from{
    opacity:0;
    transform:translateY(-8px);
  }
  to{
    opacity:1;
    transform:translateY(0);
  }
}

@media (min-width:861px){
  .nav-toggle{
    display:none;
  }
}

@media (max-width:640px){
  .command-bar__status{
    display:none;
  }
  .brand-block__strap{
    display:none;
  }
  .alert-strip__route{
    display:none;
  }
  .bento-grid{
    grid-template-columns:1fr;
  }
  .bento-cell--span-12,
  .bento-cell--span-8,
  .bento-cell--span-7,
  .bento-cell--span-6,
  .bento-cell--span-5,
  .bento-cell--span-4,
  .bento-cell--span-3{
    grid-column:span 1;
  }
}

@media (prefers-reduced-motion: reduce){
  *,
  *::before,
  *::after{
    transition:none!important;
    animation:none!important;
    scroll-behavior:auto!important;
  }
}