:root{
  --ky-red:#DD3B2E;
  --ky-red-deep:#9E1F16;
  --ky-ink:#14110F;
  --ky-paper:#F7F4EE;
  --ky-night:#101F3C;
  --ky-panel:#1B3260;
  --ky-neon:#35E0A1;
  --ky-grey:#8B857C;
  --ky-sheet:#E8E3D9;
  --ky-sand:#D8C7A4;
  --ky-line:1px solid #14110F;
  --ky-shell-w:1200px;
  --ky-gutter:clamp(16px,4vw,40px);
  --ky-step:8deg;
  --ky-mono:"JetBrains Mono","SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;
  --ky-sans:"Noto Sans SC","Inter","Helvetica Neue",Arial,"PingFang SC","Microsoft YaHei",sans-serif;
  --ky-shadow:4px 4px 0 var(--ky-sand);
  --masthead-h:0px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--ky-paper);
  color:var(--ky-ink);
  font-family:var(--ky-sans);
  font-size:16px;
  line-height:1.75;
  font-weight:400;
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto;}
a{color:inherit;text-decoration:none;}
a:hover{color:var(--ky-red);}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;line-height:1.15;font-weight:900;letter-spacing:-0.02em;}
p{margin:0 0 1em;}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
:focus-visible{outline:3px solid var(--ky-red);outline-offset:3px;}

/* ---------- shell ---------- */
.ky-shell{display:block;}
.ky-wrap{width:100%;max-width:var(--ky-shell-w);margin:0 auto;padding:0 var(--ky-gutter);}
.ky-skip{
  position:absolute;left:-9999px;top:0;z-index:200;
  background:var(--ky-ink);color:var(--ky-paper);
  padding:10px 16px;font-size:14px;letter-spacing:.08em;
}
.ky-skip:focus{left:12px;top:12px;color:var(--ky-paper);}

/* ---------- masthead ---------- */
.ky-masthead{
  position:sticky;top:0;z-index:120;
  background:var(--ky-paper);
  color:var(--ky-ink);
  border-bottom:var(--ky-line);
}
.ky-masthead__inner{padding-top:14px;padding-bottom:10px;}
.ky-masthead__brandbar{display:flex;align-items:flex-start;justify-content:center;position:relative;}
.ky-masthead__brand{display:flex;align-items:flex-start;gap:14px;}
.ky-masthead__logo{display:flex;align-items:baseline;gap:12px;}
.ky-masthead__mark{
  font-family:var(--ky-mono);
  font-weight:700;
  font-size:clamp(30px,5.6vw,58px);
  line-height:1;
  letter-spacing:-0.03em;
  color:var(--ky-ink);
}
.ky-masthead__mark::after{content:"";display:block;height:6px;background:var(--ky-red);margin-top:6px;}
.ky-masthead__cn{
  font-size:clamp(15px,2.2vw,24px);
  font-weight:900;
  letter-spacing:.06em;
  color:var(--ky-ink);
  padding-bottom:10px;
}
.ky-masthead__spine{
  writing-mode:vertical-rl;
  font-size:11px;
  letter-spacing:.22em;
  color:var(--ky-grey);
  text-transform:uppercase;
  align-self:stretch;
  padding-top:4px;
  border-left:1px solid var(--ky-ink);
  padding-left:6px;
  max-height:64px;
  overflow:hidden;
}
.ky-navtoggle{
  position:absolute;right:0;top:4px;
  display:none;
  align-items:center;gap:8px;
  border:2px solid var(--ky-ink);
  background:var(--ky-paper);
  padding:6px 12px;
  font-size:13px;font-weight:700;letter-spacing:.14em;
}
.ky-navtoggle__bars{display:block;width:18px;height:2px;background:var(--ky-ink);position:relative;}
.ky-navtoggle__bars::before,.ky-navtoggle__bars::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ky-ink);}
.ky-navtoggle__bars::before{top:-6px;}
.ky-navtoggle__bars::after{top:6px;}
.ky-masthead__navrow{
  display:flex;align-items:center;justify-content:center;
  gap:clamp(12px,2vw,32px);
  margin-top:12px;
  position:relative;
}
.ky-nav__list{display:flex;flex-wrap:wrap;justify-content:center;gap:clamp(8px,1.6vw,26px);}
.ky-nav__link{
  display:inline-block;
  font-size:clamp(15px,1.5vw,18px);
  font-weight:900;
  letter-spacing:.04em;
  padding:2px 0 4px;
  border-bottom:3px solid transparent;
}
.ky-nav__link:hover{border-bottom-color:var(--ky-sand);}
.ky-nav__link[aria-current="page"]{color:var(--ky-red);border-bottom-color:var(--ky-red);}
.ky-quickrow{display:flex;gap:8px;margin-left:auto;}
.ky-quick{
  display:inline-block;
  font-size:11px;
  letter-spacing:.14em;
  font-weight:700;
  text-transform:uppercase;
  padding:5px 10px;
  background:var(--ky-sheet);
  border:1px solid var(--ky-ink);
  box-shadow:3px 3px 0 var(--ky-sand);
  white-space:nowrap;
  transform:rotate(-1.5deg);
}
.ky-quick--red{background:var(--ky-red);color:var(--ky-paper);transform:rotate(1.5deg);}
.ky-quick--red:hover{background:var(--ky-red-deep);color:var(--ky-paper);}
.ky-masthead.is-compact .ky-masthead__inner{padding-top:6px;padding-bottom:6px;}
.ky-masthead.is-compact .ky-masthead__brandbar{align-items:center;justify-content:flex-start;}
.ky-masthead.is-compact .ky-masthead__navrow{margin-top:0;justify-content:flex-start;flex-wrap:wrap;}
.ky-masthead.is-compact .ky-masthead__mark{font-size:22px;}
.ky-masthead.is-compact .ky-masthead__mark::after{height:3px;margin-top:3px;}
.ky-masthead.is-compact .ky-masthead__cn{font-size:14px;padding-bottom:0;}
.ky-masthead.is-compact .ky-masthead__spine{display:none;}
.ky-masthead.is-compact .ky-masthead__brand{margin-right:clamp(12px,3vw,40px);}
.ky-masthead.is-compact .ky-nav__link{border-bottom-width:2px;padding-bottom:2px;}

/* ---------- buttons ---------- */
.ky-btn{
  display:inline-block;
  font-weight:900;
  font-size:15px;
  letter-spacing:.06em;
  padding:11px 20px;
  border:2px solid var(--ky-ink);
  background:var(--ky-paper);
  color:var(--ky-ink);
  box-shadow:var(--ky-shadow);
  transition:box-shadow .16s ease,transform .16s ease,background-color .16s ease;
}
.ky-btn:hover{transform:translate(-2px,-2px);box-shadow:6px 6px 0 var(--ky-sand);color:var(--ky-ink);}
.ky-btn:active{transform:translate(2px,2px);box-shadow:2px 2px 0 var(--ky-sand);}
.ky-btn--red{background:var(--ky-red);color:var(--ky-paper);}
.ky-btn--red:hover{background:var(--ky-red-deep);color:var(--ky-paper);}
.ky-btn--ghost{background:transparent;box-shadow:none;border-color:var(--ky-ink);}
.ky-btn--ghost:hover{background:var(--ky-sheet);box-shadow:none;transform:none;}
.ky-btn--dark{background:var(--ky-night);color:var(--ky-paper);border-color:var(--ky-night);box-shadow:4px 4px 0 var(--ky-neon);}
.ky-btn--dark:hover{background:var(--ky-panel);color:var(--ky-paper);}

/* ---------- labels / notices / rules ---------- */
.ky-label{
  display:inline-block;
  font-family:var(--ky-mono);
  font-size:11px;
  letter-spacing:.18em;
  text-transform:uppercase;
  background:var(--ky-sand);
  color:var(--ky-ink);
  border:1px solid var(--ky-ink);
  padding:3px 8px;
  transform:rotate(-1deg);
}
.ky-notice{
  border-left:5px solid var(--ky-red);
  background:var(--ky-sheet);
  padding:12px 16px;
  font-size:14px;
  color:var(--ky-ink);
}
.ky-notice p:last-child{margin-bottom:0;}
.ky-rule{height:0;border-top:var(--ky-line);margin:0;}

/* ---------- breadcrumb ---------- */
.ky-breadcrumb{font-size:13px;color:var(--ky-grey);letter-spacing:.04em;margin:18px 0 0;}
.ky-breadcrumb ol{display:flex;flex-wrap:wrap;gap:8px;align-items:center;}
.ky-breadcrumb li::after{content:"/";margin-left:8px;color:var(--ky-grey);}
.ky-breadcrumb li:last-child::after{content:"";}
.ky-breadcrumb a{color:var(--ky-ink);font-weight:700;}
.ky-breadcrumb a:hover{color:var(--ky-red);}
.ky-breadcrumb [aria-current="page"]{color:var(--ky-grey);}

/* ---------- grid ---------- */
.ky-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:clamp(16px,2.4vw,32px);}
.ky-grid--split{grid-template-columns:repeat(12,1fr);}
.ky-grid--uneven > .ky-col-a{grid-column:1 / span 7;}
.ky-grid--uneven > .ky-col-b{grid-column:8 / span 5;}
.ky-grid--uneven > .ky-col-b-first{grid-column:1 / span 5;}
.ky-grid--uneven > .ky-col-a-wide{grid-column:6 / span 7;}
.ky-grid--timeline{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:0;border-top:var(--ky-line);}
.ky-grid--timeline > *{border-bottom:var(--ky-line);border-right:var(--ky-line);padding:18px;}
.ky-grid--timeline > *:last-child{border-right:0;}

/* ---------- sections ---------- */
.ky-section{padding:clamp(36px,6vw,72px) 0;}
.ky-section--dark{background:var(--ky-night);color:var(--ky-paper);}
.ky-section--dark a{color:var(--ky-paper);}
.ky-section--dark a:hover{color:var(--ky-neon);}
.ky-section--sheet{background:var(--ky-sheet);}
.ky-section__head{display:flex;align-items:flex-end;gap:16px;flex-wrap:wrap;margin-bottom:24px;border-bottom:var(--ky-line);padding-bottom:10px;}
.ky-section__head h2{font-size:clamp(24px,3.4vw,38px);}
.ky-section__head .ky-label{margin-bottom:6px;}

/* ---------- cards ---------- */
.ky-card{
  background:var(--ky-paper);
  border:2px solid var(--ky-ink);
  box-shadow:var(--ky-shadow);
  padding:20px;
  position:relative;
}
.ky-card--stack-2{transform:translate(-4px,-4px);}
.ky-card--sheet{background:var(--ky-sheet);}
.ky-card__head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:12px;}
.ky-card__head h3{font-size:clamp(18px,2.2vw,24px);}
.ky-card__body{font-size:16px;}
.ky-card__foot{margin-top:16px;padding-top:12px;border-top:1px solid var(--ky-grey);font-size:13px;color:var(--ky-grey);}

/* ---------- dark panel + stats ---------- */
.ky-panel{background:var(--ky-panel);color:var(--ky-paper);padding:20px;border-left:5px solid var(--ky-neon);}
.ky-panel a{color:var(--ky-paper);}
.ky-stat{display:flex;flex-direction:column;gap:2px;padding:12px 0;}
.ky-stat__num{
  font-family:var(--ky-mono);
  font-weight:700;
  font-size:clamp(30px,4.4vw,52px);
  line-height:1;
  color:var(--ky-neon);
  letter-spacing:-0.02em;
}
.ky-stat__unit{font-family:var(--ky-mono);font-size:13px;color:var(--ky-grey);letter-spacing:.14em;text-transform:uppercase;}
.ky-stat__cap{font-size:13px;color:var(--ky-paper);opacity:.86;}
.ky-stat--flip .ky-stat__num{transition:transform .28s ease;}

/* ---------- chapter rail ---------- */
.ky-chapterrail{font-size:13px;}
.ky-chapterrail__title{
  font-family:var(--ky-mono);
  font-size:11px;letter-spacing:.2em;text-transform:uppercase;
  color:var(--ky-grey);margin-bottom:10px;
}
.ky-chapterrail__list{display:flex;flex-direction:column;gap:2px;}
.ky-chapterrail__link{
  display:flex;gap:10px;align-items:baseline;
  padding:6px 8px;
  border-left:3px solid transparent;
  color:var(--ky-grey);
  font-weight:700;
}
.ky-chapterrail__link:hover{color:var(--ky-ink);background:var(--ky-sheet);}
.ky-chapterrail__link.is-active{color:var(--ky-red);border-left-color:var(--ky-red);background:var(--ky-sheet);}
.ky-chapterrail__no{font-family:var(--ky-mono);font-size:11px;}

/* ---------- filter bar ---------- */
.ky-filterbar{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:18px;}
.ky-filter{
  font-size:13px;font-weight:700;letter-spacing:.08em;
  padding:6px 12px;border:1px solid var(--ky-ink);background:var(--ky-paper);
}
.ky-filter:hover{background:var(--ky-sheet);}
.ky-filter.is-active{background:var(--ky-ink);color:var(--ky-paper);}
.ky-filter[aria-pressed="true"]{background:var(--ky-red);color:var(--ky-paper);border-color:var(--ky-red);}
.ky-notebook{border:2px dashed var(--ky-ink);padding:14px;background:var(--ky-sheet);font-size:14px;}

/* ---------- media ---------- */
.ky-media{
  position:relative;
  width:100%;
  aspect-ratio:16/9;
  overflow:hidden;
  background:linear-gradient(135deg,var(--ky-night) 0%,var(--ky-panel) 58%,var(--ky-red-deep) 100%);
  border:2px solid var(--ky-ink);
  box-shadow:var(--ky-shadow);
}
.ky-media img{width:100%;height:100%;object-fit:cover;}
.ky-media--wide{aspect-ratio:21/9;}
.ky-media--tall{aspect-ratio:3/4;}
.ky-media--duo{aspect-ratio:1/1;}
.ky-media__cap{
  position:absolute;left:0;bottom:0;
  background:var(--ky-paper);color:var(--ky-ink);
  font-size:12px;letter-spacing:.1em;padding:5px 10px;border-top:2px solid var(--ky-ink);border-right:2px solid var(--ky-ink);
}
.ky-media--cut{clip-path:polygon(0 0,100% 0,100% 92%,0 100%);}

/* ---------- reveal ---------- */
.ky-reveal{opacity:0;transform:translateY(12px);transition:opacity .36s ease,transform .36s ease;}
.ky-reveal.is-in{opacity:1;transform:none;}

/* ---------- reading rail ---------- */
.ky-reading{position:fixed;right:14px;bottom:18px;z-index:150;}
.ky-reading[hidden]{display:none;}
.ky-reading__btn{display:flex;flex-direction:column;align-items:center;gap:8px;}
.ky-reading__track{display:block;width:6px;height:clamp(64px,14vh,132px);background:var(--ky-sheet);border:1px solid var(--ky-ink);position:relative;overflow:hidden;}
.ky-reading__fill{position:absolute;left:0;bottom:0;width:100%;height:0;background:var(--ky-red);transition:height .18s linear;}
.ky-reading__word{font-family:var(--ky-mono);font-size:10px;letter-spacing:.2em;color:var(--ky-ink);background:var(--ky-paper);border:1px solid var(--ky-ink);padding:2px 5px;}
.ky-reading__btn:hover .ky-reading__word{background:var(--ky-red);color:var(--ky-paper);}

/* ---------- footer ---------- */
.ky-foot{background:var(--ky-night);color:var(--ky-paper);border-top:4px solid var(--ky-red);margin-top:40px;}
.ky-foot__inner{padding:clamp(32px,5vw,56px) var(--ky-gutter) 26px;}
.ky-foot a{color:var(--ky-paper);}
.ky-foot a:hover{color:var(--ky-neon);}
.ky-foot__grid{display:grid;grid-template-columns:1.4fr 1fr 1.3fr 1.1fr;gap:clamp(20px,3vw,44px);}
.ky-foot__logo{font-family:var(--ky-mono);font-size:22px;font-weight:700;letter-spacing:-0.02em;margin-bottom:6px;border-bottom:2px solid var(--ky-red);display:inline-block;padding-bottom:4px;}
.ky-foot__logo span{font-family:var(--ky-sans);font-size:16px;letter-spacing:.08em;font-weight:900;}
.ky-foot__slogan{font-size:17px;font-weight:900;margin:10px 0 6px;color:var(--ky-paper);}
.ky-foot__meta{font-family:var(--ky-mono);font-size:12px;letter-spacing:.08em;color:var(--ky-grey);margin:0;}
.ky-foot__title{font-size:13px;letter-spacing:.18em;text-transform:uppercase;color:var(--ky-sand);margin-bottom:12px;font-weight:700;}
.ky-foot__list li{font-size:14px;padding:4px 0;color:#EDE9E1;}
.ky-foot__list--plain li{color:#EDE9E1;}
.ky-foot__icp{font-family:var(--ky-mono);font-size:12px;color:var(--ky-grey);margin:12px 0 0;letter-spacing:.06em;}
.ky-foot__baseline{margin:28px 0 0;padding-top:14px;border-top:1px solid rgba(247,244,238,.22);font-size:13px;color:var(--ky-grey);}

/* ---------- responsive ---------- */
@media (max-width:1080px){
  .ky-grid--uneven > .ky-col-a,
  .ky-grid--uneven > .ky-col-a-wide{grid-column:1 / span 12;}
  .ky-grid--uneven > .ky-col-b,
  .ky-grid--uneven > .ky-col-b-first{grid-column:1 / span 12;}
  .ky-foot__grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:860px){
  .ky-masthead.is-compact .ky-masthead__mark{font-size:20px;}
  .ky-navtoggle{display:inline-flex;}
  .ky-masthead__brandbar{justify-content:flex-start;}
  .ky-masthead__brandbar{padding-right:96px;}
  .ky-masthead__navrow{display:block;margin-top:10px;}
  .ky-nav{
    display:none;
    border-top:var(--ky-line);
    margin-top:6px;
    padding-top:10px;
  }
  .ky-nav[data-open="true"]{display:block;}
  .ky-nav__list{flex-direction:column;gap:0;justify-content:flex-start;}
  .ky-nav__item{border-bottom:1px solid var(--ky-sheet);}
  .ky-nav__link{display:block;padding:12px 0;border-bottom:2px solid transparent;}
  .ky-nav__link[aria-current="page"]{border-bottom-color:transparent;color:var(--ky-red);}
  .ky-quickrow{margin-left:0;margin-top:12px;flex-wrap:wrap;}
  .ky-masthead.is-compact .ky-masthead__navrow{display:flex;align-items:center;gap:10px;}
  .ky-masthead.is-compact .ky-nav{display:none;width:100%;}
  .ky-masthead.is-compact .ky-nav[data-open="true"]{display:block;}
  .ky-grid{grid-template-columns:1fr;}
  .ky-grid--timeline > *{border-right:0;}
  .ky-section__head{flex-direction:column;align-items:flex-start;}
  .ky-chapterrail{border:1px solid var(--ky-ink);background:var(--ky-paper);padding:10px;margin-bottom:18px;}
  .ky-chapterrail__list{flex-direction:row;overflow-x:auto;gap:6px;}
  .ky-chapterrail__link{border-left:0;border-bottom:3px solid transparent;white-space:nowrap;}
  .ky-chapterrail__link.is-active{border-left:0;border-bottom-color:var(--ky-red);}
  .ky-reading{right:10px;bottom:12px;}
}
@media (max-width:600px){
  body{font-size:16px;}
  .ky-foot__grid{grid-template-columns:1fr;}
  .ky-masthead__mark{font-size:26px;}
  .ky-masthead__cn{font-size:14px;}
  .ky-card{padding:16px;}
  .ky-media,.ky-media--wide,.ky-media--tall,.ky-media--duo{aspect-ratio:4/3;}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;}
  .ky-reveal{opacity:1;transform:none;}
  .ky-reading__fill{transition:none;}
}