:root{
  color-scheme: dark;
  --ink-900:#070E17;
  --ink-800:#0E1A28;
  --ink-700:#16283A;
  --teal:#35E8C0;
  --teal-deep:#0F7F6B;
  --cream:#F4E9D4;
  --brown:#1C1710;
  --coral:#FF6B4A;
  --amber:#FFC24B;
  --mist:#A8BACB;
  --ember:#E4573D;
  --ice:#DFFBF3;
  --bg:#070E17;
  --surface:#0E1A28;
  --surface-alt:#0B1520;
  --footer-bg:#050B12;
  --line:#16283A;
  --line-soft:rgba(168,186,203,.14);
  --text:#D7E3EE;
  --text-dim:#A8BACB;
  --heading:#DFFBF3;
  --accent:#35E8C0;
  --accent-deep:#0F7F6B;
  --on-accent:#04211C;
  --label:#FFC24B;
  --signal-soft:rgba(53,232,192,.10);
  --grid-line:rgba(53,232,192,.05);
  --glow:rgba(53,232,192,.16);
  --shadow:0 18px 40px rgba(0,0,0,.45);
  --cut:14px;
  --maxw:1240px;
  --gutter:clamp(16px,4vw,40px);
  --gap:clamp(16px,2.2vw,26px);
  --font-display:"Oswald","Barlow Condensed","Arial Narrow","Impact","PingFang SC","Microsoft YaHei",sans-serif;
  --font-body:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono","SFMono-Regular",Menlo,Consolas,"Courier New",monospace;
}
:root[data-theme="light"]{
  color-scheme: light;
  --bg:#F2E8D6;
  --surface:#FBF3E3;
  --surface-alt:#EFE3CE;
  --footer-bg:#EAE0CB;
  --line:#D6C4A4;
  --line-soft:rgba(28,23,16,.12);
  --text:#2A2318;
  --text-dim:#6E6350;
  --heading:#171208;
  --accent:#0E6E5C;
  --accent-deep:#0A5548;
  --on-accent:#F7EFDE;
  --label:#A8620A;
  --signal-soft:rgba(14,110,92,.10);
  --grid-line:rgba(28,23,16,.06);
  --glow:rgba(14,110,92,.12);
  --shadow:0 14px 32px rgba(28,23,16,.16);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
img,svg{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
a{color:inherit;text-decoration:none}
body{
  background-color:var(--bg);
  background-image:linear-gradient(var(--grid-line) 1px,transparent 1px),linear-gradient(90deg,var(--grid-line) 1px,transparent 1px);
  background-size:24px 24px,24px 24px;
  color:var(--text);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  font-weight:400;
  min-height:100vh;
}
:focus-visible{outline:2px solid var(--teal);outline-offset:3px}
::selection{background:var(--teal);color:#04211C}
h1,h2,h3,h4{font-family:var(--font-display);font-weight:700;line-height:1.18;color:var(--heading);letter-spacing:.01em}
h1{font-size:clamp(32px,5vw,60px);font-weight:800;letter-spacing:.02em}
h2{font-size:clamp(24px,3.2vw,34px)}
h3{font-size:20px}
p{line-height:1.75}
.ky-container{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:var(--gutter)}
.ky-section{padding-block:clamp(30px,5vw,64px)}
.ky-label{display:inline-flex;align-items:center;gap:9px;font-family:var(--font-mono);font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--label)}
.ky-label::before{content:"";display:block;width:18px;height:2px;background:currentColor}
.ky-divider{height:1px;border:0;background:linear-gradient(90deg,var(--line),transparent);margin-block:clamp(20px,3vw,34px)}
.ky-panel{
  position:relative;
  background:var(--surface);
  border:1px solid var(--line);
  padding:clamp(16px,2.4vw,26px);
  clip-path:polygon(var(--cut) 0,100% 0,100% calc(100% - var(--cut)),calc(100% - var(--cut)) 100%,0 100%,0 var(--cut));
}
.ky-panel--paper{
  background:var(--cream);
  color:var(--brown);
  border-color:#D9C8A6;
}
.ky-panel--paper h2,.ky-panel--paper h3{color:var(--brown)}
.ky-btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:12px 22px;
  font-family:var(--font-display);font-weight:700;font-size:15px;letter-spacing:.08em;
  color:var(--text);background:var(--surface);border:1px solid var(--line);
  clip-path:polygon(10px 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%,0 10px);
  transition:transform .18s ease,background .18s ease,border-color .18s ease,color .18s ease;
}
.ky-btn:hover{transform:translateY(-2px);border-color:var(--accent);color:var(--accent)}
.ky-btn:focus-visible{outline:2px solid var(--ice);outline-offset:-4px}
.ky-btn--signal{background:var(--accent);border-color:var(--accent);color:var(--on-accent)}
.ky-btn--signal:hover{background:var(--accent-deep);border-color:var(--accent-deep);color:var(--ice)}
.ky-btn--ghost{background:transparent}
.ky-btn--coral{background:var(--coral);border-color:var(--coral);color:#1C1710}
.ky-btn--coral:hover{background:var(--amber);border-color:var(--amber);color:#1C1710}
.ky-tag{
  display:inline-flex;align-items:center;gap:6px;padding:3px 10px;
  font-family:var(--font-mono);font-size:10px;letter-spacing:.14em;text-transform:uppercase;
  background:var(--coral);color:#1C1710;
  clip-path:polygon(6px 0,100% 0,100% calc(100% - 6px),calc(100% - 6px) 100%,0 100%,0 6px);
}
.ky-tag--amber{background:var(--amber)}
.ky-tag--teal{background:var(--teal);color:#04211C}
.ky-grid{display:grid;gap:var(--gap);grid-template-columns:repeat(auto-fit,minmax(min(100%,240px),1fr))}
.ky-grid--rail{grid-template-columns:minmax(0,1fr)}
@media (min-width:960px){
  .ky-grid--rail{grid-template-columns:minmax(170px,2fr) minmax(0,7fr) minmax(0,3fr)}
}
.ky-media{
  position:relative;overflow:hidden;
  aspect-ratio:16/9;
  background:linear-gradient(140deg,var(--surface),var(--bg));
  border:1px solid var(--line);
  clip-path:polygon(var(--cut) 0,100% 0,100% calc(100% - var(--cut)),calc(100% - var(--cut)) 100%,0 100%,0 var(--cut));
}
.ky-media img{width:100%;height:100%;object-fit:cover;filter:contrast(1.06) saturate(1.08)}
.ky-media::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(var(--grid-line) 1px,transparent 1px),linear-gradient(90deg,var(--grid-line) 1px,transparent 1px);
  background-size:18px 18px;
}
.ky-media[data-placeholder]::before{
  content:attr(data-placeholder);
  position:absolute;inset:0;display:flex;align-items:center;justify-content:center;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.2em;text-transform:uppercase;
  color:var(--text-dim);text-align:center;padding:12px;
}
.ky-media--wide{aspect-ratio:21/9}
.ky-media--square{aspect-ratio:1/1}
.ky-figure{margin:0}
.ky-figcaption{margin-top:8px;font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;color:var(--text-dim)}
.breadcrumb{margin-block:clamp(14px,2vw,22px) clamp(6px,1vw,12px)}
.breadcrumb-list{display:flex;flex-wrap:wrap;align-items:center;font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--text-dim)}
.breadcrumb-item{display:inline-flex;align-items:center}
.breadcrumb-item:not(:first-child)::before{content:"/";margin:0 8px;opacity:.45}
.breadcrumb-link{color:var(--text-dim);transition:color .16s ease}
.breadcrumb-link:hover{color:var(--accent)}
.breadcrumb-current{color:var(--accent)}
.prose{max-width:68ch;color:var(--text)}
.prose h2{margin-top:1.6em;margin-bottom:.6em}
.prose h3{margin-top:1.4em;margin-bottom:.5em;color:var(--heading)}
.prose p+p{margin-top:1em}
.prose ul,.prose ol{margin:1em 0;padding-left:1.2em;list-style:disc}
.prose li+li{margin-top:.4em}
.prose a{color:var(--accent);border-bottom:1px solid var(--glow)}
.prose strong{color:var(--heading)}
.skip-link{
  position:fixed;top:8px;left:8px;z-index:200;
  padding:10px 18px;
  background:var(--accent);color:var(--on-accent);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;
  transform:translateY(-200%);
  transition:transform .18s ease;
  clip-path:polygon(8px 0,100% 0,100% calc(100% - 8px),calc(100% - 8px) 100%,0 100%,0 8px);
}
.skip-link:focus{transform:translateY(0)}
.site-header{position:relative;padding-top:3px;background:var(--surface);color:var(--text);border-bottom:1px solid var(--line);z-index:20}
.read-progress{position:fixed;top:0;left:0;right:0;height:3px;z-index:90;background:rgba(0,0,0,.22);pointer-events:none}
.read-progress-bar{display:block;height:100%;width:100%;transform:scaleX(0);transform-origin:0 50%;background:linear-gradient(90deg,var(--teal),var(--amber))}
.header-rail{
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  padding:10px var(--gutter);
  border-bottom:1px dashed var(--line);
}
.rail-left,.rail-right{display:flex;align-items:center;gap:8px;min-width:0}
.rail-mark{
  display:inline-flex;align-items:center;gap:10px;
  padding:4px 12px 4px 5px;
  border:1px solid var(--line);
  color:var(--text-dim);
  transition:border-color .18s ease,color .18s ease,background .18s ease;
  clip-path:polygon(8px 0,100% 0,100% calc(100% - 8px),calc(100% - 8px) 100%,0 100%,0 8px);
}
.rail-mark:hover{border-color:var(--accent);color:var(--accent);background:var(--signal-soft)}
.rail-mark-glyph{
  width:22px;height:22px;flex:none;
  background:linear-gradient(140deg,var(--teal),var(--teal-deep));
  clip-path:polygon(50% 0,100% 27%,100% 73%,50% 100%,0 73%,0 27%);
}
.rail-mark-text{display:flex;flex-direction:column;line-height:1.15;min-width:0}
.rail-mark-en{font-family:var(--font-mono);font-size:10px;letter-spacing:.16em;color:var(--accent);text-transform:uppercase}
.rail-mark-cn{font-size:12px;letter-spacing:.06em;white-space:nowrap}
.tool-btn{
  display:inline-flex;align-items:center;gap:7px;
  padding:7px 13px;
  font-size:12px;letter-spacing:.08em;
  color:var(--text-dim);background:transparent;border:1px solid var(--line);
  transition:color .18s ease,border-color .18s ease,background .18s ease;
  clip-path:polygon(8px 0,100% 0,100% calc(100% - 8px),calc(100% - 8px) 100%,0 100%,0 8px);
}
.tool-btn:hover{color:var(--accent);border-color:var(--accent)}
.tool-btn:focus-visible{outline:2px solid var(--ice);outline-offset:-3px}
.tool-btn--signal{background:var(--signal-soft);border-color:rgba(53,232,192,.42);color:var(--accent)}
.tool-btn-dot{width:6px;height:6px;border-radius:50%;background:currentColor;box-shadow:0 0 9px currentColor;flex:none}
.nav-toggle{
  display:none;align-items:center;gap:9px;
  padding:7px 13px;
  font-size:12px;letter-spacing:.1em;
  color:var(--accent);background:var(--signal-soft);border:1px solid var(--line);
  clip-path:polygon(8px 0,100% 0,100% calc(100% - 8px),calc(100% - 8px) 100%,0 100%,0 8px);
}
.nav-toggle:focus-visible{outline:2px solid var(--ice);outline-offset:-3px}
.nav-toggle-bars{position:relative;width:16px;height:2px;background:currentColor;box-shadow:0 -5px 0 currentColor,0 5px 0 currentColor;transition:transform .2s ease,box-shadow .2s ease,background .2s ease}
.nav-toggle.is-open .nav-toggle-bars{background:transparent;box-shadow:none;transform:rotate(45deg)}
.nav-toggle.is-open .nav-toggle-bars::after{content:"";position:absolute;inset:0;background:currentColor;transform:rotate(90deg)}
.nav-toggle-text{white-space:nowrap}
.masthead{position:relative;text-align:center;padding:clamp(16px,2.8vw,28px) var(--gutter) clamp(12px,2vw,20px)}
.masthead::after{content:"";position:absolute;left:50%;transform:translateX(-50%);bottom:0;width:min(160px,40%);height:2px;background:linear-gradient(90deg,transparent,var(--accent),transparent);opacity:.7}
.masthead-kicker{font-family:var(--font-mono);font-size:10px;letter-spacing:.36em;text-transform:uppercase;color:var(--text-dim)}
.masthead-brand{display:inline-flex;align-items:center;gap:clamp(10px,1.8vw,18px);margin-top:8px}
.masthead-brand-en{
  font-family:var(--font-display);font-weight:800;
  font-size:clamp(32px,6.2vw,58px);line-height:.92;letter-spacing:.05em;text-transform:uppercase;
  color:var(--heading);
}
.masthead-brand-sep{width:2px;height:clamp(24px,4vw,40px);background:linear-gradient(180deg,var(--accent),transparent)}
.masthead-brand-cn{font-family:var(--font-display);font-weight:700;font-size:clamp(15px,2.6vw,24px);letter-spacing:.24em;color:var(--accent)}
.masthead-meta{margin-top:10px;font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--text-dim)}
.masthead-meta-num{color:var(--label);font-size:13px}
.primary-nav{display:block;border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--surface-alt)}
.nav-list{display:flex;flex-wrap:wrap;justify-content:center}
.nav-item{position:relative}
.nav-link{
  display:inline-flex;align-items:center;gap:8px;
  padding:13px clamp(11px,1.9vw,24px);
  font-size:15px;font-weight:500;letter-spacing:.1em;
  color:var(--text-dim);
  transition:color .18s ease,background .18s ease;
}
.nav-link::before{content:attr(data-index);font-family:var(--font-mono);font-size:10px;letter-spacing:.04em;color:var(--text-dim);opacity:.55}
.nav-link:hover{color:var(--accent);background:var(--signal-soft)}
.nav-link[aria-current="page"]{color:var(--accent);box-shadow:inset 0 -2px 0 var(--accent);background:var(--signal-soft)}
.nav-link[aria-current="page"]::before{color:var(--accent);opacity:1}
.status-strip{display:flex;overflow:hidden;background:var(--bg);border-bottom:1px solid var(--line)}
.status-track{display:flex;width:max-content;animation:ky-marquee 44s linear infinite}
.status-group{display:flex;align-items:center}
.status-item{display:inline-flex;align-items:center;gap:9px;padding:9px 20px;font-size:12px;letter-spacing:.06em;white-space:nowrap;border-right:1px solid var(--line)}
.status-key{font-family:var(--font-mono);font-size:10px;letter-spacing:.16em;text-transform:uppercase;color:var(--label)}
.status-val{color:var(--text-dim)}
.status-dot{width:6px;height:6px;border-radius:50%;background:var(--teal);box-shadow:0 0 10px var(--teal);animation:ky-pulse 2.4s ease-in-out infinite;flex:none}
.status-strip:hover .status-track,.status-strip:focus-within .status-track{animation-play-state:paused}
@keyframes ky-marquee{from{transform:translate3d(0,0,0)}to{transform:translate3d(-50%,0,0)}}
@keyframes ky-pulse{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.45;transform:scale(.8)}}
.site-footer{
  position:relative;
  background:var(--footer-bg);
  border-top:1px solid var(--line);
  padding-top:clamp(30px,5vw,54px);
  color:var(--text);
  z-index:10;
}
.site-footer::before{
  content:"";position:absolute;top:-1px;left:0;right:0;height:3px;
  background:repeating-linear-gradient(90deg,var(--teal) 0 28px,transparent 28px 56px);
  opacity:.65;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1fr 1.35fr;
  gap:clamp(20px,3vw,40px);
  padding-bottom:clamp(26px,4vw,44px);
}
.footer-brand{display:flex;flex-direction:column;align-items:flex-start}
.footer-brand-link{display:inline-flex;flex-direction:column;gap:3px}
.footer-brand-en{font-family:var(--font-display);font-weight:800;font-size:30px;line-height:1;letter-spacing:.06em;text-transform:uppercase;color:var(--heading)}
.footer-brand-cn{font-size:14px;letter-spacing:.3em;color:var(--accent)}
.footer-tag{margin-top:12px;font-size:13px;line-height:1.7;color:var(--text-dim);max-width:24ch}
.footer-brand .ky-btn{margin-top:16px}
.footer-note{margin-top:16px;padding-left:11px;border-left:2px solid var(--line);font-size:12px;line-height:1.7;color:var(--text-dim);max-width:28ch}
.footer-col{min-width:0}
.footer-col-title{display:flex;align-items:center;gap:8px;margin-bottom:13px;font-family:var(--font-mono);font-size:11px;font-weight:500;letter-spacing:.2em;text-transform:uppercase;color:var(--label)}
.footer-col-title::before{content:"";width:7px;height:7px;flex:none;background:var(--coral);clip-path:polygon(50% 0,100% 50%,50% 100%,0 50%)}
.footer-links{display:flex;flex-direction:column;gap:9px}
.footer-links a{display:inline-flex;align-items:center;gap:0;font-size:14px;color:var(--text-dim);transition:color .16s ease,gap .16s ease}
.footer-links a::before{content:"";width:0;height:1px;background:var(--accent);transition:width .18s ease}
.footer-links a:hover,.footer-links a:focus-visible{color:var(--accent);gap:8px}
.footer-links a:hover::before,.footer-links a:focus-visible::before{width:12px}
.footer-contact{display:flex;flex-direction:column;gap:11px;min-width:0}
.footer-contact-row{display:flex;flex-direction:column;gap:1px}
.footer-contact-key{font-family:var(--font-mono);font-size:10px;letter-spacing:.16em;text-transform:uppercase;color:var(--text-dim);opacity:.85}
.footer-contact-val{font-size:13px;color:var(--text);word-break:break-word}
.footer-contact-link{display:inline-flex;align-items:center;align-self:flex-start;margin-top:4px;padding:6px 14px;font-size:12px;letter-spacing:.08em;color:var(--accent);border:1px solid var(--line);transition:border-color .18s ease,background .18s ease;clip-path:polygon(8px 0,100% 0,100% calc(100% - 8px),calc(100% - 8px) 100%,0 100%,0 8px)}
.footer-contact-link:hover{border-color:var(--accent);background:var(--signal-soft)}
.footer-bar{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;padding:16px 0 22px;border-top:1px solid var(--line);font-size:12px;letter-spacing:.04em;color:var(--text-dim)}
.footer-copy{font-size:12px}
.footer-icp{font-family:var(--font-mono);font-size:11px;letter-spacing:.06em;color:var(--text-dim)}
.footer-legal-links{display:flex;flex-wrap:wrap;gap:16px}
.footer-legal-links a{color:var(--text-dim);transition:color .16s ease}
.footer-legal-links a:hover{color:var(--accent)}
.to-top{
  position:fixed;right:clamp(14px,3vw,28px);bottom:clamp(14px,3vw,28px);z-index:80;
  display:inline-flex;align-items:center;gap:6px;
  padding:10px 16px;
  font-family:var(--font-display);font-weight:700;font-size:13px;letter-spacing:.08em;
  background:var(--accent);color:var(--on-accent);
  box-shadow:var(--shadow);
  clip-path:polygon(10px 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%,0 10px);
  transition:transform .18s ease,background .18s ease;
}
.to-top[hidden]{display:none}
.to-top:hover{transform:translateY(-2px);background:var(--accent-deep);color:var(--ice)}
.to-top:focus-visible{outline:2px solid var(--ice);outline-offset:-3px}
@media (max-width:1080px){
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;row-gap:clamp(22px,3vw,32px)}
  .footer-brand{grid-column:1 / -1}
  .footer-contact{grid-column:1 / -1;display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:14px 24px}
  .footer-contact .footer-col-title{grid-column:1 / -1;margin-bottom:0}
}
@media (max-width:900px){
  .nav-toggle{display:inline-flex}
  .primary-nav{display:none}
  .primary-nav[data-open]{display:block}
  .nav-list{flex-direction:column}
  .nav-item{border-top:1px solid var(--line)}
  .nav-item:first-child{border-top:0}
  .nav-link{width:100%;justify-content:flex-start;padding:14px var(--gutter);font-size:15px}
  .nav-link[aria-current="page"]{box-shadow:inset 3px 0 0 var(--accent)}
  .masthead-brand{flex-wrap:nowrap}
  .rail-mark-cn{display:none}
  .status-item{padding:8px 16px}
}
@media (max-width:720px){
  .footer-grid{grid-template-columns:1fr 1fr}
  .footer-brand,.footer-contact{grid-column:1 / -1}
  .footer-bar{flex-direction:column;align-items:flex-start;gap:8px}
  .masthead-brand-sep{display:none}
  .masthead-brand{flex-direction:column;gap:4px}
  .masthead-brand-cn{letter-spacing:.32em}
  .tool-btn--ghost{display:none}
}
@media (max-width:480px){
  .footer-grid{grid-template-columns:1fr}
  .footer-contact{grid-template-columns:1fr}
  .header-rail{padding-block:8px}
  .rail-mark-en{display:none}
  .read-progress{height:2px}
}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
  .status-track{animation:none !important}
  .status-strip{overflow-x:auto}
  .status-dot{animation:none !important;opacity:1}
  .ky-btn:hover,.to-top:hover{transform:none}
}