:root{
  --ink:#08160F;
  --field:#102E22;
  --grass:#1F6B4C;
  --signal:#FF6A1A;
  --amber:#FFC24B;
  --white:#F4F8F6;
  --cold:#9BB0BA;
  --line:#46565E;
  --panel:#EDF3F0;
  --alert:#D1483A;
  --shell:1360px;
  --pad:clamp(1rem,4vw,4.5rem);
  --r:2px;
  --mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --sans:"Noto Sans SC","PingFang SC",-apple-system,BlinkMacSystemFont,"Microsoft YaHei",sans-serif;
  --narrow:"Archivo Narrow","Oswald","Noto Sans SC",system-ui,"PingFang SC",sans-serif;
  --ease:cubic-bezier(.22,1,.36,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background-color:var(--ink);
  background-image:
    linear-gradient(to right,rgba(70,86,94,.16) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(70,86,94,.16) 1px,transparent 1px);
  background-size:8px 8px;
  color:var(--white);
  font-family:var(--sans);
  font-size:17px;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{font-family:var(--narrow);font-weight:800;letter-spacing:.01em;line-height:1.12;margin:0 0 .6em}
h1{font-size:clamp(2.4rem,5.6vw,5.2rem)}
h2{font-size:clamp(1.7rem,3vw,2.4rem);font-weight:700}
h3{font-size:1.125rem;font-weight:700;letter-spacing:.02em}
p{margin:0 0 1.1em;max-width:68ch}
a{color:var(--white);text-decoration:none}
a:hover{color:var(--amber)}
img{max-width:100%;display:block}
ul,ol{margin:0 0 1.1em;padding-left:1.2em}
:focus-visible{outline:2px solid var(--amber);outline-offset:3px;border-radius:var(--r)}
::selection{background:var(--signal);color:var(--ink)}
.shell{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:var(--pad)}
.mono{font-family:var(--mono);font-size:.9em;font-variant-numeric:tabular-nums;letter-spacing:.02em}
.muted{color:var(--cold)}
.list-reset{list-style:none;padding:0;margin:0}
.skip-link{
  position:fixed;top:.5rem;left:.5rem;z-index:200;
  transform:translateY(-160%);
  background:var(--amber);color:var(--ink);
  padding:.55rem 1rem;border-radius:var(--r);
  font-family:var(--mono);font-size:.85rem;font-weight:700;
  transition:transform .2s var(--ease);
}
.skip-link:focus{transform:translateY(0);color:var(--ink)}
.pill{border-radius:999px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5rem;
  padding:.62rem 1.15rem;
  font-family:var(--sans);font-size:.95rem;font-weight:700;line-height:1.2;
  border:1px solid transparent;border-radius:var(--r);
  cursor:pointer;text-align:center;
  transition:background-color .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
}
.btn-primary{background:var(--signal);color:var(--ink)}
.btn-primary:hover{background:var(--amber);color:var(--ink)}
.btn-ghost{background:transparent;color:var(--white);border-color:var(--grass)}
.btn-ghost:hover{border-color:var(--amber);color:var(--amber)}
.site-header{
  position:sticky;top:0;z-index:120;
  background:rgba(8,22,15,.86);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(10px);
}
.header-inner{
  display:flex;align-items:center;gap:1.25rem;
  min-height:74px;
  padding-block:.6rem;
}
.brand{display:flex;flex-direction:column;gap:.15rem;flex:0 0 auto;max-width:16rem}
.brand-mark{font-family:var(--narrow);font-weight:800;font-size:1.4rem;letter-spacing:.02em;color:var(--white);line-height:1.1}
.brand:hover .brand-mark{color:var(--amber)}
.brand-line{font-family:var(--mono);font-size:.68rem;color:var(--cold);letter-spacing:.06em;text-transform:uppercase;line-height:1.4}
.site-nav{
  margin-inline:auto;
  background:var(--field);
  border:1px solid var(--line);
  padding:.3rem;
}
.nav-list{display:flex;align-items:center;gap:.15rem}
.nav-link{
  display:block;position:relative;
  padding:.5rem .85rem;
  font-size:.95rem;font-weight:500;color:var(--cold);
  border-radius:999px;
  transition:color .2s var(--ease),background-color .2s var(--ease);
  white-space:nowrap;
}
.nav-link:hover{color:var(--white);background:rgba(31,107,76,.4)}
.nav-link[aria-current="page"]{color:var(--white);background:rgba(31,107,76,.55)}
.nav-link[aria-current="page"]::after{
  content:"";position:absolute;left:50%;bottom:.16rem;transform:translateX(-50%);
  width:16px;height:2px;background:var(--signal);
}
.header-actions{display:flex;align-items:center;gap:.5rem;flex:0 0 auto}
.nav-cta{padding:.5rem 1rem;font-size:.9rem}
.nav-toggle{
  display:none;flex-direction:column;justify-content:center;gap:4px;
  width:42px;height:38px;padding:0 .55rem;
  background:var(--field);border:1px solid var(--grass);cursor:pointer;
}
.nav-toggle-bar{display:block;height:2px;width:100%;background:var(--white);transition:transform .2s var(--ease),opacity .2s var(--ease)}
.nav-toggle[data-open="true"] .nav-toggle-bar:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[data-open="true"] .nav-toggle-bar:nth-child(2){opacity:0}
.nav-toggle[data-open="true"] .nav-toggle-bar:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:.4rem;
  font-family:var(--mono);font-size:.78rem;letter-spacing:.06em;text-transform:uppercase;
  color:var(--cold);margin:0 0 1.6rem;
}
.breadcrumb a{color:var(--cold)}
.breadcrumb a:hover{color:var(--amber)}
.breadcrumb li{display:inline-flex;align-items:center;gap:.4rem}
.breadcrumb li+li::before{content:"/";color:var(--line)}
.article{max-width:68ch}
.article h2{margin-top:2.4em}
.section-block{
  position:relative;
  padding-block:clamp(3rem,7vw,6rem);
  border-top:1px solid var(--line);
}
.section-num{
  display:block;
  font-family:var(--narrow);font-weight:800;
  font-size:clamp(3.6rem,12vw,10rem);
  line-height:.82;letter-spacing:-.02em;
  color:transparent;
  -webkit-text-stroke:1px var(--grass);
  margin:0 0 .2rem;
}
.section-head{margin-bottom:1.4rem}
.section-head h2{margin-bottom:.35rem}
.section-head .mono{color:var(--signal)}
.grid-12{display:grid;grid-template-columns:repeat(12,1fr);gap:1.4rem}
.col-main{grid-column:span 7}
.col-side{grid-column:span 4}
.divider{height:1px;background:var(--line);border:0;margin:1.4rem 0}
.card{
  background:var(--field);
  border:1px solid var(--line);
  border-radius:var(--r);
  padding:1.15rem 1.25rem;
}
.card h3{margin-bottom:.35rem}
.card-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:.7rem;
  font-family:var(--mono);font-size:.76rem;letter-spacing:.05em;
  color:var(--cold);text-transform:uppercase;
}
.card-meta .stamp{color:var(--amber)}
.tagbar{
  display:flex;flex-wrap:wrap;gap:.5rem;
  padding-block:.5rem;
}
.tag{
  display:inline-flex;align-items:center;gap:.4rem;
  padding:.28rem .7rem;
  font-family:var(--mono);font-size:.76rem;letter-spacing:.05em;
  color:var(--cold);
  background:transparent;
  border:1px solid var(--line);border-radius:var(--r);
  cursor:pointer;
}
.tag:hover{border-color:var(--amber);color:var(--amber)}
.tag[aria-pressed="true"],.tag.is-active{
  border-color:var(--signal);color:var(--white);
  background:rgba(255,106,26,.14);
}
.timeline{position:relative;margin:0;padding:0;list-style:none}
.timeline::before{content:"";position:absolute;left:0;top:0;bottom:0;width:1px;background:var(--grass)}
.timeline-node{
  position:relative;padding-left:1.4rem;
}
.timeline-node::before{
  content:"";position:absolute;left:-4px;top:.62em;
  width:9px;height:9px;background:var(--grass);border-radius:50%;
  transition:background-color .3s var(--ease);
}
.timeline-node.is-current::before{background:var(--signal)}
.panel-light{
  background:var(--panel);color:var(--ink);
  padding:clamp(1.4rem,3vw,2.4rem);
}
.panel-light h2,.panel-light h3{color:var(--ink)}
.panel-light a{color:var(--grass)}
.panel-light a:hover{color:var(--ink);background:var(--amber)}
.notice{
  border-left:3px solid var(--alert);
  background:rgba(209,72,58,.12);
  padding:.85rem 1rem;
  color:var(--white);
}
.media-frame{
  position:relative;
  overflow:hidden;
  border-radius:var(--r);
  background:var(--field);
  aspect-ratio:16/9;
}
.media-frame img{width:100%;height:100%;object-fit:cover;filter:saturate(.72) contrast(1.06) brightness(.86)}
.media-frame::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(16,46,34,.15),rgba(8,22,15,.6))}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--tall{aspect-ratio:4/5}
.media-frame figcaption{
  position:absolute;left:0;right:0;bottom:0;z-index:2;
  padding:.6rem .8rem;
  font-family:var(--mono);font-size:.72rem;letter-spacing:.05em;color:var(--cold);
  background:rgba(8,22,15,.72);
}
.reveal{opacity:0;transform:translateY(12px);transition:opacity .32s var(--ease),transform .32s var(--ease)}
.reveal.is-visible{opacity:1;transform:none}
.stagger>*{transition-delay:0ms}
.site-footer{
  margin-top:clamp(3rem,8vw,6rem);
  background:var(--field);
  border-top:1px solid var(--line);
  padding-block:clamp(2rem,4vw,3.2rem) 1.4rem;
  color:var(--white);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.3fr 1fr 1fr 1.4fr;
  gap:clamp(1.2rem,3vw,2.4rem);
}
.footer-title{
  font-family:var(--mono);font-size:.74rem;letter-spacing:.08em;text-transform:uppercase;
  color:var(--cold);margin:0 0 .8rem;
}
.footer-list{display:flex;flex-direction:column;gap:.5rem;font-size:.92rem}
.footer-list a{color:var(--white)}
.footer-list a:hover{color:var(--amber)}
.footer-list li{color:var(--cold);font-size:.88rem}
.footer-brand{font-family:var(--narrow);font-weight:800;font-size:1.3rem;margin:0 0 .4rem;letter-spacing:.02em}
.footer-tag{color:var(--cold);font-size:.9rem;margin:0 0 .6rem;max-width:34ch}
.footer-note{
  font-size:.82rem;color:var(--cold);margin:0;max-width:36ch;
  border-left:2px solid var(--grass);padding-left:.7rem;
}
.footer-legal{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:.6rem;
  margin-top:2rem;padding-top:1rem;border-top:1px solid var(--line);
}
.footer-legal p{margin:0;font-family:var(--mono);font-size:.76rem;letter-spacing:.04em;color:var(--cold);max-width:none}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item summary{
  display:flex;gap:.8rem;align-items:baseline;
  padding:.9rem 0;cursor:pointer;list-style:none;font-weight:700;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";margin-left:auto;color:var(--signal);font-family:var(--mono)}
.faq-item[open] summary::after{content:"–"}
.faq-item summary:hover{color:var(--amber)}
.faq-item .faq-body{padding:0 0 1.1rem}
@media (max-width:1024px){
  .header-inner{min-height:66px}
  .brand{max-width:none}
  .brand-line{display:none}
  .site-nav{display:none}
  .nav-toggle{display:flex}
  .grid-12{grid-template-columns:repeat(6,1fr);gap:1.1rem}
  .col-main,.col-side{grid-column:span 6}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:768px){
  body{font-size:16px}
  .header-inner{gap:.6rem}
  .brand-mark{font-size:1.15rem}
  .nav-cta{padding:.42rem .7rem;font-size:.82rem}
  .site-nav{
    display:block;
    position:fixed;left:var(--pad);right:var(--pad);bottom:1rem;z-index:140;
    margin:0;padding:.6rem;
    background:var(--ink);
    border:1px solid var(--grass);
    border-radius:var(--r);
    box-shadow:0 18px 40px rgba(0,0,0,.5);
    opacity:0;visibility:hidden;transform:translateY(14px);
    transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s;
  }
  .site-nav[data-open="true"]{opacity:1;visibility:visible;transform:none}
  .nav-list{flex-direction:column;align-items:stretch;gap:.1rem}
  .nav-link{padding:.7rem .8rem;border-radius:var(--r)}
  .nav-link[aria-current="page"]::after{left:.8rem;transform:none;bottom:.45rem;width:14px}
  .header-actions{margin-left:auto}
  .footer-grid{grid-template-columns:1fr}
  .footer-legal{flex-direction:column}
  body{padding-bottom:0}
  main{padding-bottom:7rem}
  .tagbar{flex-wrap:nowrap;overflow-x:auto;scrollbar-width:thin;padding-bottom:.7rem}
  .tag{flex:0 0 auto}
  .grid-12{grid-template-columns:1fr}
  .section-num{font-size:clamp(3rem,22vw,6rem)}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important;scroll-behavior:auto!important}
  .reveal{opacity:1;transform:none}
  .stagger>*{transition-delay:0ms!important}
}