:root{
  --ink-0:#070A1F;
  --ink-1:#0B1030;
  --ink-2:#141B45;
  --ink-3:#1E2760;
  --ink-4:#2E3A85;
  --gold:#F5C451;
  --magenta:#FF4FA3;
  --emerald:#17C9A0;
  --amber:#FF7A45;
  --paper:#E8EAF6;
  --mute:#9AA3D6;
  --font-display:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-body:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-serif:"Songti SC","Source Han Serif SC","Noto Serif CJK SC",Georgia,"Times New Roman",serif;
  --font-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;
  --wrap-max:1240px;
  --gutter:clamp(16px,4vw,40px);
  --line:2px solid var(--ink-3);
  --shadow-hard:8px 8px 0 var(--ink-0);
  --shadow-soft:4px 4px 0 var(--ink-0);
  --ease:190ms cubic-bezier(.2,.7,.3,1);
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background-color:var(--ink-1);
  background-image:
    linear-gradient(to right,rgba(46,58,133,.16) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(46,58,133,.16) 1px,transparent 1px);
  background-size:72px 72px;
  color:var(--paper);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,h5,p,ul,ol,dl,dd,figure{margin:0;}
ul,ol{padding:0;list-style:none;}
img,svg{max-width:100%;}
a{color:inherit;}
button{font:inherit;color:inherit;}
strong{font-weight:900;color:var(--paper);}
a:focus-visible,
button:focus-visible,
summary:focus-visible,
input:focus-visible,
textarea:focus-visible,
[tabindex]:focus-visible{
  outline:2px solid var(--gold);
  outline-offset:2px;
  border-radius:0;
}

.sr-only{
  position:absolute;
  width:1px;height:1px;
  margin:-1px;padding:0;
  overflow:hidden;
  clip:rect(0 0 0 0);
  white-space:nowrap;
  border:0;
}
.num{
  font-family:var(--font-mono);
  font-weight:500;
  letter-spacing:.02em;
  font-variant-numeric:tabular-nums;
}

/* ---------- layout ---------- */
.wrap{
  width:100%;
  max-width:var(--wrap-max);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.section{padding-block:clamp(40px,6vw,88px);}
.section-head{
  display:flex;
  align-items:baseline;
  gap:14px;
  flex-wrap:wrap;
  margin-bottom:clamp(18px,3vw,30px);
  padding-bottom:12px;
  border-bottom:2px solid var(--ink-3);
}
.section-title{
  font-family:var(--font-display);
  font-size:clamp(24px,3.4vw,36px);
  font-weight:900;
  line-height:1.14;
  letter-spacing:-.01em;
  color:var(--paper);
}
.eyebrow{
  font-family:var(--font-serif);
  font-size:13.5px;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--gold);
  margin:0 0 10px;
}
.rule{
  height:2px;
  border:0;
  background:linear-gradient(90deg,var(--gold),var(--magenta) 45%,transparent);
  margin:clamp(24px,4vw,44px) 0;
}
.display-1{
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(38px,6vw,92px);
  line-height:.94;
  letter-spacing:-.02em;
  color:var(--paper);
  margin:0;
}
.display-glow{
  color:var(--gold);
  -webkit-text-stroke:1px rgba(245,196,81,.55);
  text-shadow:0 0 26px rgba(245,196,81,.35);
}
.prose{max-width:36em;font-size:17px;line-height:1.75;color:var(--paper);}
.prose p{margin:0 0 1em;}
.prose ul{list-style:square;padding-left:1.2em;margin:0 0 1em;}
.prose li{margin-bottom:8px;line-height:1.6;}
.prose a{color:var(--gold);text-decoration:none;border-bottom:1px solid rgba(245,196,81,.5);}
.prose a:hover{border-bottom-color:var(--gold);}
.prose h2,.prose h3{font-family:var(--font-display);font-weight:900;line-height:1.2;margin:1.4em 0 .5em;}

.grid{display:grid;gap:clamp(16px,2.4vw,28px);}
.grid--7-5{grid-template-columns:minmax(0,7fr) minmax(0,5fr);}
.grid--8-4{grid-template-columns:minmax(0,8fr) minmax(0,4fr);}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr));}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.5em;
  padding:.68em 1.15em;
  border:2px solid var(--ink-4);
  background:var(--ink-2);
  color:var(--paper);
  font-size:14px;
  font-weight:700;
  line-height:1.2;
  letter-spacing:.02em;
  text-decoration:none;
  border-radius:0;
  transition:background var(--ease),color var(--ease),border-color var(--ease),transform var(--ease),box-shadow var(--ease);
}
.btn:hover{border-color:var(--gold);color:var(--gold);transform:translate(-2px,-2px);box-shadow:var(--shadow-soft);}
.btn--gold{
  background:var(--gold);
  border-color:var(--gold);
  color:var(--ink-0);
  box-shadow:var(--shadow-soft);
}
.btn--gold:hover{background:#FFD97A;border-color:#FFD97A;color:var(--ink-0);box-shadow:var(--shadow-hard);}
.btn--ghost{background:transparent;color:var(--paper);border-color:var(--ink-4);}
.btn--ghost:hover{background:var(--ink-3);color:var(--gold);border-color:var(--gold);}
.btn--block{display:flex;width:100%;}

/* ---------- header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:var(--ink-0);
  border-bottom:2px solid var(--ink-3);
}
.skip-link{
  position:fixed;
  top:-120px;
  left:12px;
  z-index:200;
  padding:10px 16px;
  background:var(--gold);
  color:var(--ink-0);
  font-weight:900;
  font-size:14px;
  text-decoration:none;
  border:2px solid var(--ink-0);
  transition:top var(--ease);
}
.skip-link:focus{top:12px;}

.topstrip{
  background:linear-gradient(90deg,var(--ink-1) 0%,var(--ink-2) 42%,var(--ink-4) 74%,#7B2C63 100%);
  border-bottom:1px solid var(--ink-3);
}
.topstrip-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  padding-block:8px;
  font-size:12px;
  letter-spacing:.04em;
  color:var(--mute);
}
.topstrip-brandline{
  margin:0;
  font-family:var(--font-serif);
  font-size:12.5px;
  letter-spacing:.14em;
  color:var(--paper);
}
.topstrip-status{
  display:inline-flex;
  align-items:center;
  gap:8px;
  margin:0;
  color:var(--mute);
}
.status-dot{
  width:6px;height:6px;
  flex:none;
  border-radius:50%;
  background:var(--emerald);
  box-shadow:0 0 8px rgba(23,201,160,.85);
}
.topstrip-right{
  display:flex;
  align-items:center;
  gap:12px;
  margin-left:auto;
}
.version-tag{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--gold);
  border:1px solid rgba(245,196,81,.55);
  padding:2px 7px;
  white-space:nowrap;
}
.topstrip-mail{
  font-family:var(--font-mono);
  font-size:11.5px;
  color:var(--mute);
}

.nav-band-inner{
  display:flex;
  align-items:center;
  gap:clamp(10px,2vw,26px);
  padding-block:14px;
}
.brand{
  display:flex;
  align-items:center;
  gap:12px;
  text-decoration:none;
  color:var(--paper);
  flex:none;
}
.brand-mark{
  width:38px;height:38px;
  flex:none;
  display:grid;
  place-items:center;
  background:linear-gradient(140deg,var(--gold),var(--magenta));
  color:var(--ink-0);
  font-family:var(--font-mono);
  font-weight:700;
  font-size:13px;
  letter-spacing:.02em;
  box-shadow:4px 4px 0 var(--ink-0);
  clip-path:polygon(0 0,100% 0,100% 72%,72% 100%,0 100%);
}
.brand-text{display:flex;flex-direction:column;}
.brand-name{
  display:block;
  font-family:var(--font-display);
  font-size:clamp(15px,1.7vw,19px);
  font-weight:900;
  letter-spacing:.02em;
  line-height:1.15;
  color:var(--paper);
}
.brand-sub{
  display:block;
  font-family:var(--font-serif);
  font-size:11px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--mute);
  line-height:1.4;
}
.nav{display:flex;}
.nav-list{
  display:flex;
  align-items:center;
  gap:2px;
}
.nav-item{margin:0;}
.nav-link{
  position:relative;
  display:block;
  padding:10px 12px;
  font-size:14.5px;
  font-weight:700;
  letter-spacing:.02em;
  color:#C9CFEC;
  text-decoration:none;
  border:2px solid transparent;
  transition:color var(--ease),background var(--ease),border-color var(--ease);
}
.nav-link::after{
  content:"";
  position:absolute;
  left:12px;right:12px;bottom:5px;
  height:2px;
  background:var(--mute);
  transform:translateX(0);
  transition:background var(--ease),transform var(--ease);
}
.nav-link:hover{color:var(--gold);background:var(--ink-2);}
.nav-link:hover::after{background:var(--gold);transform:translateX(2px);}
.nav-link[aria-current="page"]{
  color:var(--gold);
  background:var(--ink-3);
  border-color:var(--ink-4);
}
.nav-link[aria-current="page"]::after{background:var(--gold);}
.nav-toggle{
  display:none;
  width:46px;height:42px;
  align-items:center;
  justify-content:center;
  background:var(--ink-2);
  border:2px solid var(--ink-4);
  color:var(--paper);
  cursor:pointer;
  border-radius:0;
  transition:background var(--ease),color var(--ease),border-color var(--ease);
}
.nav-toggle:hover{border-color:var(--gold);color:var(--gold);}
.nav-toggle[aria-expanded="true"]{background:var(--gold);border-color:var(--gold);color:var(--ink-0);}
.nav-toggle-bars{
  display:block;
  width:18px;height:2px;
  background:currentColor;
  box-shadow:0 -6px 0 currentColor,0 6px 0 currentColor;
}
.header-actions{
  display:flex;
  align-items:center;
  gap:10px;
  margin-left:auto;
}
.scroll-progress{
  position:absolute;
  left:0;right:0;bottom:-2px;
  height:3px;
  background:rgba(30,39,96,.55);
  pointer-events:none;
}
.scroll-progress-bar{
  display:block;
  height:100%;
  width:100%;
  transform:scaleX(0);
  transform-origin:0 50%;
  background:linear-gradient(90deg,var(--gold),var(--magenta));
}

/* ---------- footer ---------- */
.site-footer{
  background:var(--ink-0);
  border-top:2px solid var(--ink-3);
  color:var(--mute);
}
.footer-rail{
  height:10px;
  background:linear-gradient(90deg,var(--gold),var(--magenta) 58%,var(--ink-4));
  clip-path:polygon(0 0,100% 0,100% 42%,0 100%);
}
.footer-inner{padding-block:clamp(34px,5vw,60px) 0;}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr .9fr .9fr 1.5fr;
  gap:clamp(20px,3vw,40px);
  padding-bottom:clamp(26px,4vw,44px);
}
.footer-brand{min-width:0;}
.footer-name{
  font-family:var(--font-display);
  font-size:clamp(18px,2.2vw,22px);
  font-weight:900;
  color:var(--paper);
  letter-spacing:.02em;
  line-height:1.2;
}
.footer-tagline{
  margin-top:8px;
  font-family:var(--font-serif);
  font-size:13.5px;
  letter-spacing:.08em;
  color:var(--mute);
}
.footer-meta{
  margin-top:12px;
  font-size:12.5px;
  letter-spacing:.04em;
  color:var(--mute);
}
.footer-meta .num{color:var(--gold);}
.footer-badges{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  margin-top:14px;
}
.footer-col-title{
  font-family:var(--font-serif);
  font-size:13px;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--gold);
  margin-bottom:14px;
  padding-bottom:8px;
  border-bottom:1px solid var(--ink-3);
}
.footer-links{display:flex;flex-direction:column;gap:9px;}
.footer-link{
  display:inline-block;
  font-size:14px;
  color:var(--mute);
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color var(--ease),border-color var(--ease),transform var(--ease);
}
.footer-link:hover{color:var(--gold);border-bottom-color:var(--gold);transform:translateX(2px);}
.footer-contact{min-width:0;}
.fc-list{margin:0;}
.fc-row{
  display:grid;
  grid-template-columns:52px minmax(0,1fr);
  gap:10px;
  padding:7px 0;
  border-bottom:1px dashed rgba(46,58,133,.85);
}
.fc-label{
  font-family:var(--font-serif);
  font-size:12.5px;
  letter-spacing:.1em;
  color:var(--ink-4);
}
.fc-value{
  margin:0;
  font-size:13.5px;
  color:var(--paper);
  word-break:break-word;
}
.footer-note{
  margin-top:12px;
  font-size:12.5px;
  line-height:1.7;
  color:var(--mute);
}
.footer-bottom{
  display:flex;
  align-items:center;
  justify-content:space-between;
  flex-wrap:wrap;
  gap:12px 24px;
  padding-block:18px 24px;
  border-top:2px solid var(--ink-3);
  font-size:12.5px;
  color:var(--ink-4);
}
.footer-icp{font-family:var(--font-mono);letter-spacing:.04em;color:var(--mute);}
.footer-legal{display:flex;flex-wrap:wrap;gap:16px;}
.footer-legal .footer-link{font-size:12.5px;color:var(--mute);}
.footer-signoff{color:var(--mute);}
.footer-signoff .num{color:var(--gold);}

/* ---------- components ---------- */
.card{
  background:var(--ink-2);
  border:var(--line);
  padding:clamp(18px,2.4vw,26px);
  box-shadow:var(--shadow-soft);
  transition:transform var(--ease),border-color var(--ease),box-shadow var(--ease);
}
.card:hover{transform:translateY(-2px);border-color:var(--gold);box-shadow:var(--shadow-hard);}
.card--edge{clip-path:polygon(0 0,100% 0,100% calc(100% - 18px),calc(100% - 18px) 100%,0 100%);}
.card-title{
  font-family:var(--font-display);
  font-size:clamp(17px,2vw,21px);
  font-weight:900;
  line-height:1.3;
  color:var(--paper);
  margin-bottom:8px;
}
.card-meta{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--mute);
}

.chip{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:6px 14px;
  border:2px solid var(--ink-3);
  background:var(--ink-2);
  color:var(--paper);
  font-size:13.5px;
  font-weight:700;
  text-decoration:none;
  cursor:pointer;
  border-radius:0;
  transition:background var(--ease),border-color var(--ease),color var(--ease);
}
.chip:hover{border-color:var(--gold);color:var(--gold);}
.chip[aria-pressed="true"],
.chip.is-active{background:var(--gold);border-color:var(--gold);color:var(--ink-0);}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.08em;
  padding:3px 8px;
  border:1px solid var(--ink-4);
  color:var(--mute);
  white-space:nowrap;
}
.tag--gold{border-color:rgba(245,196,81,.6);color:var(--gold);}
.tag--emerald{border-color:rgba(23,201,160,.6);color:var(--emerald);}
.tag--amber{border-color:rgba(255,122,69,.6);color:var(--amber);}

.stamp{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:500;
  letter-spacing:.1em;
  color:var(--ink-0);
  background:var(--gold);
  padding:4px 12px 4px 10px;
  clip-path:polygon(0 0,100% 0,calc(100% - 8px) 100%,0 100%);
}
[data-stamp].is-stamped{animation:stamp-in 120ms ease-out both;}
@keyframes stamp-in{
  0%{transform:scale(1.12);}
  100%{transform:scale(1);}
}

.panel{
  background:var(--ink-2);
  border:var(--line);
  box-shadow:var(--shadow-soft);
}
.panel + .panel{margin-top:12px;}
.panel-summary{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:14px 18px;
  cursor:pointer;
  list-style:none;
  font-size:15px;
  font-weight:700;
  color:var(--paper);
  transition:color var(--ease),background var(--ease);
}
.panel-summary::-webkit-details-marker{display:none;}
.panel-summary:hover{color:var(--gold);background:var(--ink-3);}
.panel-summary::after{
  content:"＋";
  font-family:var(--font-mono);
  color:var(--gold);
  flex:none;
}
.panel[open] .panel-summary::after{content:"－";}
.panel-body{
  padding:0 18px 18px;
  font-size:15px;
  line-height:1.7;
  color:var(--mute);
  border-top:1px dashed rgba(46,58,133,.9);
  padding-top:14px;
}

.inline-note{
  display:flex;
  gap:12px;
  align-items:flex-start;
  padding:12px 14px;
  background:rgba(23,201,160,.08);
  border:2px solid rgba(23,201,160,.45);
  color:var(--paper);
  font-size:14.5px;
  line-height:1.6;
}
.inline-note::before{
  content:"";
  width:6px;
  align-self:stretch;
  flex:none;
  background:var(--emerald);
}
.inline-note--warn{
  background:rgba(255,122,69,.08);
  border-color:rgba(255,122,69,.5);
}
.inline-note--warn::before{background:var(--amber);}

.media-frame{
  position:relative;
  display:block;
  overflow:hidden;
  border:2px solid var(--ink-3);
  background:linear-gradient(150deg,var(--ink-2),var(--ink-3) 55%,#3A2C63);
  box-shadow:var(--shadow-hard);
}
.media-frame img{
  display:block;
  width:100%;
  height:100%;
  object-fit:cover;
  filter:brightness(.82) saturate(1.1) contrast(1.05);
}
.media-frame::after{
  content:"";
  position:absolute;
  inset:auto 0 0 0;
  height:45%;
  background:linear-gradient(to top,rgba(11,16,48,.82),transparent);
  pointer-events:none;
}
.media-frame--wide{aspect-ratio:21 / 9;}
.media-frame--tall{aspect-ratio:4 / 5;}
.media-frame--square{aspect-ratio:1 / 1;}
.media-caption{
  display:block;
  margin-top:8px;
  font-family:var(--font-serif);
  font-size:13px;
  letter-spacing:.04em;
  color:var(--mute);
}

.breadcrumb{font-size:13px;color:var(--mute);}
.breadcrumb-list{display:flex;flex-wrap:wrap;align-items:center;gap:8px;}
.breadcrumb-item{display:inline-flex;align-items:center;gap:8px;}
.breadcrumb-item a{
  color:var(--mute);
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color var(--ease),border-color var(--ease);
}
.breadcrumb-item a:hover{color:var(--gold);border-bottom-color:var(--gold);}
.breadcrumb-sep{color:var(--ink-4);font-family:var(--font-mono);}

.spy-nav{
  display:flex;
  flex-direction:column;
  gap:2px;
  border-left:2px solid var(--ink-3);
  padding-left:14px;
}
.spy-link{
  display:block;
  padding:5px 0;
  font-size:13px;
  color:var(--mute);
  text-decoration:none;
  transition:color var(--ease),transform var(--ease);
}
.spy-link:hover{color:var(--gold);transform:translateX(2px);}
.spy-link.is-active,
.spy-link[aria-current="true"]{
  color:var(--gold);
  font-weight:700;
}

/* ---------- responsive ---------- */
@media (max-width:1080px){
  .nav-link{padding:10px 9px;font-size:13.5px;}
  .topstrip-mail{display:none;}
}
@media (max-width:980px){
  .nav-band-inner{flex-wrap:wrap;row-gap:0;}
  .nav-toggle{display:flex;margin-left:auto;}
  .nav{
    display:none;
    flex-basis:100%;
    order:3;
    margin-top:12px;
  }
  .nav[data-open]{display:block;}
  .nav-list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
    border-top:2px solid var(--ink-3);
    padding-top:8px;
  }
  .nav-link{
    padding:14px 6px;
    font-size:16px;
    border:0;
    border-bottom:1px solid var(--ink-3);
  }
  .nav-link::after{left:6px;right:auto;width:26px;bottom:9px;}
  .nav-link[aria-current="page"]{background:var(--ink-2);border-left:2px solid var(--gold);}
  .header-actions{
    display:none;
    flex-basis:100%;
    order:4;
    margin-left:0;
  }
  .site-header[data-nav-open] .header-actions{
    display:flex;
    flex-direction:column;
    align-items:stretch;
    gap:10px;
    margin-top:14px;
    padding-bottom:16px;
  }
  .site-header[data-nav-open] .header-actions .btn{width:100%;}
  .grid--7-5,
  .grid--8-4,
  .grid--3{grid-template-columns:1fr;}
}
@media (max-width:880px){
  .footer-grid{grid-template-columns:1fr 1fr;}
  .footer-brand{grid-column:1 / -1;}
  .footer-contact{grid-column:1 / -1;}
}
@media (max-width:720px){
  .topstrip-inner{
    justify-content:flex-start;
    gap:6px 12px;
    padding-block:7px;
    font-size:11px;
  }
  .topstrip-brandline{font-size:11.5px;letter-spacing:.1em;}
  .topstrip-status{font-size:11px;}
  .topstrip-right{margin-left:0;}
  .topstrip-inner > .topstrip-status{order:3;flex-basis:100%;}
  .brand-mark{width:34px;height:34px;font-size:12px;}
  .brand-name{font-size:15.5px;}
  .brand-sub{font-size:10px;letter-spacing:.12em;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:10px;}
  .fc-row{grid-template-columns:46px minmax(0,1fr);}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .card:hover,
  .btn:hover,
  .footer-link:hover,
  .spy-link:hover{transform:none;}
  [data-stamp].is-stamped{animation:none;}
}