*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--ink);color:var(--paper);font-family:var(--font-sans);font-size:clamp(15px,1.05vw,17px);line-height:1.7;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
h1,h2,h3,h4,h5,h6,p,figure,blockquote,dl,dd,pre{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img,svg,video,canvas{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
a{color:inherit;text-decoration:none}
:focus-visible{outline:2px solid var(--gold-bright);outline-offset:3px;border-radius:3px}

:root{
  --ink:#0A241F;
  --ink-2:#123A30;
  --ink-3:#1C5143;
  --gold:#C9A24A;
  --gold-bright:#E8CF8A;
  --paper:#F5F1E6;
  --black:#101815;
  --data-blue:#5B6CFF;
  --data-purple:#9A6BFF;
  --data-teal:#34C6A8;
  --mute:#8FA79E;
  --line:rgba(201,162,74,.3);
  --line-soft:rgba(245,241,230,.12);
  --font-display:"Noto Serif SC","Source Han Serif SC","Songti SC",STSong,serif;
  --font-sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"IBM Plex Mono","JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --gutter:clamp(16px,3vw,40px);
  --w-max:1440px;
  --r-md:16px 6px 16px 6px;
  --r-lg:26px 10px 26px 10px;
  --shadow:0 20px 44px -30px rgba(0,0,0,.95);
}

#main-content{scroll-margin-block-start:118px}
.ky-sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

/* ---------- skip link ---------- */
.ky-skip{position:absolute;left:var(--gutter);top:-80px;z-index:120;display:inline-block;padding:11px 20px;background:var(--gold);color:var(--black);font-family:var(--font-mono);font-size:13px;letter-spacing:.08em;border-radius:6px;transition:top .18s ease}
.ky-skip:focus,.ky-skip:focus-visible{top:12px}

/* ---------- header ---------- */
.ky-header{position:sticky;top:0;z-index:80;background:var(--ink);border-bottom:1px solid var(--line-soft);box-shadow:inset 1px 0 0 rgba(201,162,74,.22),inset -1px 0 0 rgba(201,162,74,.22),0 18px 40px -34px #000}
.ky-header::before{content:"";position:absolute;inset-inline:0;top:0;height:2px;background:linear-gradient(90deg,var(--gold),var(--gold-bright) 30%,var(--data-blue) 82%,var(--data-purple))}
.ky-strip{display:flex;flex-wrap:wrap;align-items:center;gap:6px 20px;width:100%;max-width:var(--w-max);margin-inline:auto;padding:8px var(--gutter);border-bottom:1px solid rgba(201,162,74,.16);font-family:var(--font-mono);font-size:11.5px;letter-spacing:.1em;color:var(--mute)}
.ky-strip__line{color:var(--gold-bright);letter-spacing:.16em}
.ky-strip__cert{letter-spacing:.12em}
.ky-strip__links{display:flex;flex-wrap:wrap;gap:6px 18px;margin-left:auto}
.ky-strip__links a{color:var(--gold);border-bottom:1px solid transparent;transition:color .18s ease,border-color .18s ease}
.ky-strip__links a:hover,.ky-strip__links a:focus-visible{color:var(--gold-bright);border-bottom-color:var(--gold-bright)}
.ky-bar{position:relative;display:flex;flex-wrap:wrap;align-items:center;gap:14px clamp(16px,2vw,34px);width:100%;max-width:var(--w-max);margin-inline:auto;padding:clamp(10px,1.2vw,15px) var(--gutter)}

.ky-brand{display:inline-flex;align-items:center;gap:12px;flex:0 0 auto;color:var(--paper);text-decoration:none}
.ky-brand__mark{display:grid;place-items:center;width:44px;height:44px;border:1px solid var(--gold);border-radius:13px 4px 13px 4px;background:linear-gradient(155deg,rgba(201,162,74,.2),rgba(10,36,31,0) 70%);color:var(--gold-bright);font-family:var(--font-display);font-weight:900;font-size:22px;line-height:1}
.ky-brand__text{display:flex;flex-direction:column;line-height:1.15}
.ky-brand__text strong{font-family:var(--font-display);font-weight:900;font-size:19px;letter-spacing:.05em}
.ky-brand__text em{font-style:normal;font-family:var(--font-mono);font-size:10.5px;letter-spacing:.18em;color:var(--mute)}
.ky-brand:hover .ky-brand__mark,.ky-brand:focus-visible .ky-brand__mark{border-color:var(--gold-bright);color:var(--paper)}

.ky-nav{margin-left:auto}
.ky-nav__list{display:flex;align-items:center;gap:2px}
.ky-nav__item{display:block}
.ky-nav__link{position:relative;display:inline-flex;align-items:baseline;gap:7px;padding:11px 12px;color:var(--paper);border-bottom:2px solid transparent;border-radius:3px;transition:color .18s ease,border-color .18s ease,background-color .18s ease}
.ky-nav__index{font-family:var(--font-mono);font-size:10px;letter-spacing:.1em;color:var(--mute);transition:color .18s ease}
.ky-nav__label{font-size:15px;font-weight:500;letter-spacing:.02em}
.ky-nav__link:hover,.ky-nav__link:focus-visible{color:var(--gold-bright);border-bottom-color:var(--gold);background:rgba(201,162,74,.08)}
.ky-nav__link:hover .ky-nav__index,.ky-nav__link:focus-visible .ky-nav__index{color:var(--gold)}
.ky-nav__link[aria-current="page"]{color:var(--gold-bright);border-bottom-color:var(--gold-bright)}
.ky-nav__link[aria-current="page"] .ky-nav__index{color:var(--gold)}
.ky-nav__link[aria-current="page"]::after{content:"";position:absolute;left:12px;right:12px;bottom:-2px;height:2px;background:linear-gradient(90deg,var(--gold),var(--gold-bright),var(--data-blue))}

.ky-nav-toggle{display:none;align-items:center;gap:9px;margin-left:auto;padding:9px 15px;border:1px solid var(--line);border-radius:999px;color:var(--paper);font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;transition:border-color .18s ease,color .18s ease}
.ky-nav-toggle:hover,.ky-nav-toggle:focus-visible{border-color:var(--gold);color:var(--gold-bright)}
.ky-nav-toggle__bars{display:inline-flex;flex-direction:column;gap:4px;width:16px}
.ky-nav-toggle__bars span{display:block;height:2px;background:currentColor;transition:transform .18s ease}
.ky-nav-toggle.is-open .ky-nav-toggle__bars span:first-child{transform:translateY(3px) rotate(45deg)}
.ky-nav-toggle.is-open .ky-nav-toggle__bars span:last-child{transform:translateY(-3px) rotate(-45deg)}

.ky-progress{position:absolute;left:0;bottom:0;width:0;height:2px;background:linear-gradient(90deg,var(--gold),var(--gold-bright) 30%,var(--data-blue) 70%,var(--data-purple));transition:width .12s linear}

/* ---------- footer ---------- */
.ky-footer{position:relative;margin-top:auto;background:linear-gradient(180deg,#081D19 0%,var(--ink) 60%);border-top:1px solid var(--line-soft);box-shadow:inset 1px 0 0 rgba(201,162,74,.18),inset -1px 0 0 rgba(201,162,74,.18)}
.ky-footer::before{content:"";position:absolute;inset-inline:0;top:0;height:2px;background:linear-gradient(90deg,var(--gold),var(--gold-bright) 28%,var(--data-blue) 80%,var(--data-purple))}
.ky-footer__frame{width:100%;max-width:var(--w-max);margin-inline:auto;padding-inline:var(--gutter)}
.ky-footer__top{display:grid;grid-template-columns:minmax(230px,1.05fr) minmax(0,1.6fr) minmax(260px,1.15fr);gap:clamp(24px,4vw,56px);padding-block:clamp(36px,5vw,64px) clamp(24px,3vw,40px)}
.ky-footer__brand{display:flex;flex-direction:column;align-items:flex-start;gap:14px}
.ky-brand--footer .ky-brand__mark{width:52px;height:52px;font-size:26px}
.ky-brand--footer .ky-brand__text strong{font-size:20px}
.ky-footer__tag{font-family:var(--font-display);font-weight:800;font-size:17px;letter-spacing:.04em;color:var(--paper)}
.ky-footer__cert{display:inline-block;padding:5px 13px;border:1px solid var(--line);border-radius:999px;font-family:var(--font-mono);font-size:11px;letter-spacing:.18em;color:var(--gold)}

.ky-totop{display:inline-flex;align-items:center;gap:8px;margin-top:4px;padding:9px 17px;border:1px solid var(--line-soft);border-radius:999px;color:var(--gold-bright);font-family:var(--font-mono);font-size:12px;letter-spacing:.14em;transition:border-color .18s ease,color .18s ease,background-color .18s ease}
.ky-totop:hover,.ky-totop:focus-visible{border-color:var(--gold);color:var(--paper);background:rgba(201,162,74,.12)}
.ky-totop__icon{display:inline-block;line-height:1}

.ky-footer__nav{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(20px,3vw,40px)}
.ky-footer__group-title{margin-bottom:14px;padding-bottom:10px;border-bottom:1px solid var(--line-soft);font-family:var(--font-mono);font-size:11.5px;font-weight:500;letter-spacing:.2em;color:var(--gold)}
.ky-footer__links{display:flex;flex-direction:column;gap:11px}
.ky-footer__link{display:inline-flex;align-items:center;gap:9px;font-size:14.5px;letter-spacing:.02em;color:rgba(245,241,230,.8);transition:color .18s ease}
.ky-footer__link::before{content:"";display:block;width:9px;height:1px;background:var(--ink-3);transition:width .18s ease,background-color .18s ease}
.ky-footer__link:hover,.ky-footer__link:focus-visible{color:var(--gold-bright)}
.ky-footer__link:hover::before,.ky-footer__link:focus-visible::before{width:18px;background:var(--gold)}

.ky-footer__contact{display:flex;flex-direction:column;gap:13px}
.ky-footer__contact-item{display:flex;flex-direction:column;gap:3px;font-size:14.5px;line-height:1.65;color:rgba(245,241,230,.86)}
.ky-footer__contact-item span{font-family:var(--font-mono);font-size:10.5px;letter-spacing:.2em;color:var(--mute)}
.ky-footer__mail{font-family:var(--font-mono);font-size:13.5px;letter-spacing:.01em;color:var(--gold-bright);border-bottom:1px solid var(--line);word-break:break-all;align-self:flex-start}
.ky-footer__mail:hover,.ky-footer__mail:focus-visible{border-bottom-color:var(--gold-bright);color:var(--paper)}
.ky-footer__note{padding-left:13px;border-left:2px solid var(--ink-3);font-size:13px;line-height:1.65;color:var(--mute)}

.ky-footer__legal{display:flex;flex-wrap:wrap;align-items:center;gap:10px 26px;margin-top:clamp(20px,3vw,34px);padding-block:20px;border-top:1px solid var(--line-soft);font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--mute)}
.ky-footer__legal-item{color:var(--mute)}
.ky-footer__legal-links{display:flex;flex-wrap:wrap;gap:6px 20px;margin-left:auto}
.ky-footer__legal-links a{color:var(--mute);border-bottom:1px solid transparent;transition:color .18s ease,border-color .18s ease}
.ky-footer__legal-links a:hover,.ky-footer__legal-links a:focus-visible{color:var(--gold-bright);border-bottom-color:var(--gold)}

/* ---------- layout utilities ---------- */
.ky-container{width:100%;max-width:var(--w-max);margin-inline:auto;padding-inline:var(--gutter)}
.ky-section{padding-block:clamp(48px,7vw,104px)}
.ky-section--tight{padding-block:clamp(26px,4vw,56px)}
.ky-grid{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:clamp(16px,2vw,32px)}
.ky-stack{display:flex;flex-direction:column;gap:clamp(14px,2vw,26px)}
.ky-cluster{display:flex;flex-wrap:wrap;align-items:center;gap:12px 16px}
.ky-paper{background:var(--paper);color:var(--black)}
.ky-paper .ky-display,.ky-paper .ky-title,.ky-paper .ky-subtitle{color:var(--black)}
.ky-paper .ky-lead,.ky-paper .ky-body{color:#3B4A44}
.ky-paper .ky-note{color:#5C6A64}
.ky-paper .ky-kicker{color:#8A6A1E}
.ky-paper .ky-rule{background:linear-gradient(90deg,rgba(16,24,21,.28),transparent)}

/* ---------- typography ---------- */
.ky-display{font-family:var(--font-display);font-weight:900;font-size:clamp(56px,8vw,128px);line-height:1.02;letter-spacing:-.02em;color:var(--paper)}
.ky-title{font-family:var(--font-display);font-weight:900;font-size:clamp(32px,4.4vw,56px);line-height:1.08;letter-spacing:-.01em;color:var(--paper)}
.ky-subtitle{font-family:var(--font-sans);font-weight:800;font-size:clamp(20px,2.2vw,28px);line-height:1.3;color:var(--paper)}
.ky-kicker{font-family:var(--font-mono);font-size:12px;font-weight:500;letter-spacing:.26em;text-transform:uppercase;color:var(--gold)}
.ky-lead{max-width:62ch;font-size:clamp(16px,1.35vw,20px);line-height:1.75;color:rgba(245,241,230,.84)}
.ky-body{max-width:72ch;font-size:clamp(15px,1.05vw,17px);line-height:1.75;color:rgba(245,241,230,.8)}
.ky-note{font-family:var(--font-mono);font-size:13px;letter-spacing:.04em;line-height:1.7;color:var(--mute)}
.ky-mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.04em}

/* ---------- buttons ---------- */
.ky-btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;padding:13px 25px;border:1px solid transparent;border-radius:999px;font-family:var(--font-sans);font-size:15px;font-weight:600;letter-spacing:.02em;text-align:center;transition:transform .18s ease,background-color .18s ease,color .18s ease,border-color .18s ease,box-shadow .18s ease}
.ky-btn--gold{background:linear-gradient(135deg,var(--gold),var(--gold-bright));color:var(--black);box-shadow:0 12px 26px -18px rgba(232,207,138,.9)}
.ky-btn--gold:hover,.ky-btn--gold:focus-visible{background:var(--gold-bright);transform:translateY(-2px)}
.ky-btn--ghost{border-color:var(--line);color:var(--paper);background:rgba(10,36,31,.35)}
.ky-btn--ghost:hover,.ky-btn--ghost:focus-visible{border-color:var(--gold);color:var(--gold-bright);transform:translateY(-2px)}
.ky-btn--sm{padding:8px 16px;font-size:13px}

/* ---------- cards / panels / chips ---------- */
.ky-card{position:relative;display:flex;flex-direction:column;gap:12px;padding:clamp(18px,2vw,28px);background:var(--ink-2);border:1px solid var(--line-soft);border-radius:var(--r-md);box-shadow:var(--shadow);transition:transform .2s ease,border-color .2s ease,background-color .2s ease}
.ky-card:hover,.ky-card:focus-within{transform:translateY(-2px);border-color:var(--gold);background:linear-gradient(180deg,var(--ink-2),var(--ink))}
.ky-card__index{font-family:var(--font-mono);font-size:13px;letter-spacing:.18em;color:var(--gold)}
.ky-card__title{font-family:var(--font-display);font-weight:800;font-size:clamp(18px,1.6vw,22px);line-height:1.35;color:var(--paper)}
.ky-card__meta{font-family:var(--font-mono);font-size:12.5px;letter-spacing:.05em;color:var(--mute)}
.ky-card--paper{background:var(--paper);border-color:rgba(16,24,21,.14);box-shadow:0 18px 36px -30px rgba(16,24,21,.8)}
.ky-card--paper .ky-card__title{color:var(--black)}
.ky-card--paper .ky-card__index{color:#8A6A1E}
.ky-card--paper .ky-card__meta{color:#5C6A64}
.ky-card--paper:hover,.ky-card--paper:focus-within{background:var(--paper);border-color:var(--gold);transform:translateY(-2px)}

.ky-chip{display:inline-flex;align-items:center;gap:8px;padding:5px 13px;border:1px solid var(--line);border-radius:999px;background:rgba(201,162,74,.08);font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;color:var(--gold-bright)}
.ky-chip--data{border-color:transparent;background:linear-gradient(120deg,var(--data-blue),var(--data-purple));color:#fff}
.ky-chip--teal{border-color:rgba(52,198,168,.42);background:rgba(52,198,168,.12);color:var(--data-teal)}

.ky-rule{height:1px;border:0;background:linear-gradient(90deg,var(--line),transparent)}

.ky-panel{padding:clamp(20px,2.6vw,36px);background:var(--ink-2);border:1px solid var(--line-soft);border-radius:var(--r-lg);box-shadow:var(--shadow)}
.ky-panel__head{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;margin-bottom:18px;padding-bottom:14px;border-bottom:1px solid var(--line-soft)}
.ky-quote{margin:0;padding-left:18px;border-left:2px solid var(--gold);font-family:var(--font-display);font-size:clamp(17px,1.6vw,21px);line-height:1.72;color:var(--paper)}

/* ---------- breadcrumb ---------- */
.ky-breadcrumb{padding-block:clamp(14px,2vw,22px);font-family:var(--font-mono);font-size:12.5px;letter-spacing:.08em;color:var(--mute)}
.ky-breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:10px}
.ky-breadcrumb li{display:inline-flex;align-items:center;gap:10px}
.ky-breadcrumb li::after{content:"/";color:var(--ink-3)}
.ky-breadcrumb li:last-child::after{content:""}
.ky-breadcrumb__link{color:var(--mute);border-bottom:1px solid transparent;transition:color .18s ease,border-color .18s ease}
.ky-breadcrumb__link:hover,.ky-breadcrumb__link:focus-visible{color:var(--gold-bright);border-bottom-color:var(--gold)}
.ky-breadcrumb [aria-current="page"]{color:var(--paper)}

/* ---------- media base (page stage image slots) ---------- */
.ky-media{position:relative;overflow:hidden;aspect-ratio:4/3;border:1px solid var(--line-soft);border-radius:var(--r-md);background:
radial-gradient(120% 120% at 10% 0%,rgba(91,108,255,.2),transparent 58%),
radial-gradient(95% 95% at 100% 100%,rgba(154,107,255,.18),transparent 62%),
repeating-linear-gradient(0deg,rgba(245,241,230,.055) 0 1px,transparent 1px 44px),
repeating-linear-gradient(90deg,rgba(245,241,230,.055) 0 1px,transparent 1px 44px),
var(--ink-2)}
.ky-media img{width:100%;height:100%;object-fit:cover}
.ky-media--wide{aspect-ratio:16/9}
.ky-media--tall{aspect-ratio:3/4}
.ky-media--square{aspect-ratio:1/1}
.ky-media__ph{position:absolute;inset:0;display:grid;place-items:center;padding:18px;text-align:center;font-family:var(--font-mono);font-size:12px;letter-spacing:.22em;color:var(--mute)}

/* ---------- responsive ---------- */
@media (max-width:1180px){
  .ky-nav__link{padding:11px 9px}
  .ky-nav__label{font-size:14.5px}
}
@media (max-width:1080px){
  .ky-footer__top{grid-template-columns:minmax(0,1fr) minmax(0,1.2fr)}
  .ky-footer__contact{grid-column:1/-1}
}
@media (max-width:960px){
  #main-content{scroll-margin-block-start:96px}
  .ky-nav-toggle{display:inline-flex}
  .ky-nav{flex:1 0 100%;margin-left:0;display:none;margin-top:6px;padding-top:10px;border-top:1px solid var(--line-soft)}
  .ky-nav[data-open]{display:block}
  .ky-nav__list{flex-direction:column;align-items:stretch;gap:0}
  .ky-nav__link{display:flex;justify-content:flex-start;width:100%;padding:13px 8px;border-bottom:1px solid rgba(201,162,74,.14)}
  .ky-nav__link[aria-current="page"]::after{left:8px;right:8px;bottom:-1px}
  .ky-nav__label{font-size:15.5px}
}
@media (max-width:760px){
  .ky-footer__top{grid-template-columns:minmax(0,1fr);gap:32px}
  .ky-footer__contact{grid-column:auto}
  .ky-footer__nav{grid-template-columns:repeat(2,minmax(0,1fr));gap:26px}
  .ky-footer__legal{flex-direction:column;align-items:flex-start;gap:12px}
  .ky-footer__legal-links{margin-left:0}
}
@media (max-width:640px){
  .ky-strip{font-size:11px;gap:4px 12px}
  .ky-strip__line{flex:1 0 100%}
  .ky-strip__links{flex-basis:100%;margin-left:0}
  .ky-brand__mark{width:40px;height:40px;font-size:20px}
  .ky-brand__text strong{font-size:17px}
  .ky-footer__nav{grid-template-columns:minmax(0,1fr)}
  .ky-btn{width:100%}
  .ky-btn--sm{width:auto}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition-duration:.001ms !important;animation-duration:.001ms !important;animation-iteration-count:1 !important}
  .ky-card:hover,.ky-card:focus-within,.ky-btn--gold:hover,.ky-btn--ghost:hover{transform:none}
  .ky-progress{transition:none}
}