:root{
  --kv-deep:#0A2238;
  --kv-night:#123A56;
  --kv-mist:#DDE7EE;
  --kv-paper:#F7FAFC;
  --kv-cyan:#2DE2E6;
  --kv-orange:#FF8A3D;
  --kv-steel:#647F95;
  --kv-ink:#142433;
  --kv-serif:"Songti SC","Source Han Serif SC","Noto Serif SC","Times New Roman",Georgia,serif;
  --kv-sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  --kv-mono:"JetBrains Mono","SFMono-Regular",Menlo,Consolas,"Liberation Mono",monospace;
  --kv-w:1180px;
  --kv-gutter:clamp(18px,4vw,48px);
  --kv-radius-l:26px;
  --kv-radius-m:18px;
  --kv-radius-s:10px;
  --kv-line:rgba(100,127,149,.32);
  --kv-hair:rgba(221,231,238,.16);
  --kv-shadow:0 20px 44px -32px rgba(10,34,56,.6);
  --kv-ease:cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body,h1,h2,h3,h4,h5,p,ul,ol,figure,blockquote,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
button{font:inherit;color:inherit}
a{color:inherit}
body{
  min-height:100vh;
  background:var(--kv-mist);
  color:var(--kv-ink);
  font-family:var(--kv-sans);
  font-size:17px;
  line-height:1.8;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4{font-family:var(--kv-serif);font-weight:600;line-height:1.3;color:var(--kv-deep);letter-spacing:-.01em}
h1{font-size:clamp(32px,4.4vw,54px)}
h2{font-size:clamp(25px,3vw,38px)}
h3{font-size:clamp(19px,2.1vw,25px)}
p{max-width:72ch}
::selection{background:var(--kv-cyan);color:var(--kv-deep)}
:focus-visible{outline:2px solid var(--kv-cyan);outline-offset:3px;box-shadow:0 0 0 4px rgba(10,34,56,.22);border-radius:6px}
.kv-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}
.kv-mono{font-family:var(--kv-mono);font-variant-numeric:tabular-nums;letter-spacing:.02em}
.kv-skip{
  position:fixed;top:8px;left:8px;z-index:200;
  transform:translateY(-160%);
  display:inline-block;padding:10px 20px;border-radius:999px;
  background:var(--kv-cyan);color:var(--kv-deep);
  font-weight:800;font-size:14px;text-decoration:none;
  transition:transform .18s var(--kv-ease);
}
.kv-skip:focus{transform:translateY(0)}
/* ---------- header ---------- */
.kv-header{
  position:sticky;top:0;z-index:60;
  background:var(--kv-paper);
  box-shadow:0 1px 0 var(--kv-line);
}
.kv-topbar{background:var(--kv-deep);color:var(--kv-mist)}
.kv-topbar__inner{
  max-width:var(--kv-w);margin:0 auto;
  padding:0 var(--kv-gutter);
  min-height:38px;
  display:flex;align-items:center;justify-content:space-between;gap:18px;
}
.kv-topbar__brandline{font-size:12.5px;letter-spacing:.14em;color:#A7C0D1;white-space:nowrap}
.kv-topbar__issue{display:inline-flex;align-items:center;gap:9px;font-size:12.5px;color:var(--kv-mist);white-space:nowrap;max-width:none}
.kv-topbar__dot{width:6px;height:6px;border-radius:50%;background:var(--kv-cyan);box-shadow:0 0 0 3px rgba(45,226,230,.18);flex:0 0 auto}
.kv-topbar__icp{font-family:var(--kv-mono);font-size:11.5px;letter-spacing:.04em;color:#8FA9BC;white-space:nowrap;max-width:none}
.kv-navbar{position:relative;background:var(--kv-paper)}
.kv-navbar::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:5px;pointer-events:none;
  background:repeating-linear-gradient(90deg,var(--kv-steel) 0 1px,transparent 1px 14px);
  opacity:.22;
}
.kv-navbar__inner{
  max-width:var(--kv-w);margin:0 auto;
  padding:10px var(--kv-gutter);
  min-height:70px;
  display:flex;align-items:center;gap:clamp(14px,2vw,34px);
}
.kv-brand{display:inline-flex;align-items:center;gap:12px;text-decoration:none;flex:0 0 auto}
.kv-brand__mark{
  position:relative;width:40px;height:40px;border-radius:12px;
  background:var(--kv-deep);overflow:hidden;flex:0 0 auto;
  transition:border-radius .25s var(--kv-ease);
}
.kv-brand__mark::before{
  content:"";position:absolute;top:9px;left:9px;width:10px;height:22px;
  background:repeating-linear-gradient(180deg,var(--kv-cyan) 0 2px,transparent 2px 6px);
}
.kv-brand__mark::after{
  content:"";position:absolute;right:8px;bottom:8px;width:8px;height:8px;border-radius:50%;
  background:var(--kv-orange);
}
.kv-brand:hover .kv-brand__mark{border-radius:50%}
.kv-brand__text{display:flex;flex-direction:column;line-height:1.16}
.kv-brand__name{font-family:var(--kv-sans);font-weight:800;font-size:18px;letter-spacing:.08em;color:var(--kv-deep)}
.kv-brand__sub{font-family:var(--kv-mono);font-size:10px;letter-spacing:.18em;color:var(--kv-steel);text-transform:uppercase}
.kv-nav{margin-left:auto;display:flex;align-items:center;gap:clamp(10px,1.4vw,22px)}
.kv-nav__list{display:flex;align-items:center;gap:2px}
.kv-nav__item{display:block}
.kv-nav__link{
  display:inline-block;padding:9px 13px;border-radius:999px;
  font-size:15px;font-weight:700;letter-spacing:.02em;color:var(--kv-ink);
  text-decoration:none;white-space:nowrap;
  transition:background-color .2s var(--kv-ease),color .2s var(--kv-ease);
}
.kv-nav__link:hover{background:rgba(45,226,230,.16);color:var(--kv-deep)}
.kv-nav__link[aria-current="page"]{background:var(--kv-deep);color:var(--kv-cyan)}
.kv-nav__cta{
  display:inline-flex;align-items:center;justify-content:center;
  padding:11px 20px;border-radius:999px;
  background:var(--kv-orange);color:#2A1305;
  font-size:14.5px;font-weight:800;letter-spacing:.05em;text-decoration:none;white-space:nowrap;
  box-shadow:0 14px 26px -20px rgba(255,138,61,.95);
  transition:transform .2s var(--kv-ease),background-color .2s var(--kv-ease);
}
.kv-nav__cta:hover{background:#FF9E5C;transform:translateY(-1px)}
.kv-nav-toggle{
  display:none;align-items:center;gap:9px;margin-left:auto;
  padding:9px 16px;border-radius:999px;
  background:transparent;border:1px solid var(--kv-line);
  color:var(--kv-deep);font-size:14px;font-weight:800;letter-spacing:.1em;
  cursor:pointer;
}
.kv-nav-toggle__bars{position:relative;display:block;width:16px;height:10px}
.kv-nav-toggle__bars::before,
.kv-nav-toggle__bars::after{
  content:"";position:absolute;left:0;right:0;height:2px;background:var(--kv-deep);
  transition:transform .22s var(--kv-ease),top .22s var(--kv-ease);
}
.kv-nav-toggle__bars::before{top:0}
.kv-nav-toggle__bars::after{top:8px}
.kv-header[data-open] .kv-nav-toggle{background:var(--kv-deep);color:var(--kv-cyan);border-color:var(--kv-deep)}
.kv-header[data-open] .kv-nav-toggle__bars::before{top:4px;transform:rotate(45deg);background:var(--kv-cyan)}
.kv-header[data-open] .kv-nav-toggle__bars::after{top:4px;transform:rotate(-45deg);background:var(--kv-cyan)}
.kv-nav-toggle__label{line-height:1}
.kv-progress{
  position:absolute;left:0;right:0;bottom:0;height:2px;
  background:rgba(100,127,149,.16);
}
.kv-progress__bar{
  display:block;height:100%;width:100%;
  transform:scaleX(0);transform-origin:0 50%;
  background:linear-gradient(90deg,var(--kv-cyan),var(--kv-orange));
  transition:transform .12s linear;
}
@media (max-width:1040px){
  .kv-nav-toggle{display:inline-flex}
  .kv-nav{
    position:absolute;top:100%;left:0;right:0;
    margin-left:0;
    flex-direction:column;align-items:stretch;gap:0;
    padding:14px var(--kv-gutter) 24px;
    background:var(--kv-deep);
    border-top:1px solid rgba(45,226,230,.28);
    box-shadow:0 26px 40px -30px rgba(10,34,56,.9);
    opacity:0;visibility:hidden;transform:translateY(-10px);
    transition:opacity .22s var(--kv-ease),transform .22s var(--kv-ease),visibility .22s;
  }
  .kv-header[data-open] .kv-nav{opacity:1;visibility:visible;transform:translateY(0)}
  .kv-nav__list{flex-direction:column;align-items:stretch;gap:4px}
  .kv-nav__link{
    display:block;padding:13px 16px;border-radius:12px;
    color:var(--kv-mist);font-size:16px;
  }
  .kv-nav__link:hover{background:rgba(45,226,230,.14);color:var(--kv-paper)}
  .kv-nav__link[aria-current="page"]{
    background:rgba(45,226,230,.16);color:var(--kv-cyan);
    box-shadow:inset 3px 0 0 var(--kv-cyan);
  }
  .kv-nav__cta{margin-top:14px;padding:13px 20px;font-size:15px}
}
@media (max-width:760px){
  .kv-topbar__brandline,.kv-topbar__issue{display:none}
  .kv-topbar__inner{justify-content:center;min-height:32px}
  .kv-navbar__inner{min-height:62px;padding:8px var(--kv-gutter)}
  .kv-brand__name{font-size:16.5px}
  .kv-brand__sub{font-size:9px}
}
/* ---------- footer ---------- */
.kv-footer{
  position:relative;
  margin-top:clamp(52px,8vw,104px);
  padding:clamp(40px,6vw,76px) 0 26px;
  background:var(--kv-deep);color:var(--kv-mist);
}
.kv-footer__rule{
  position:absolute;top:0;left:0;right:0;height:6px;
  background:repeating-linear-gradient(90deg,var(--kv-cyan) 0 1px,transparent 1px 18px);
  opacity:.4;
}
.kv-footer__inner{max-width:var(--kv-w);margin:0 auto;padding:0 var(--kv-gutter)}
.kv-footer__masthead{
  display:flex;flex-wrap:wrap;align-items:baseline;justify-content:space-between;
  gap:16px 44px;padding-bottom:26px;border-bottom:1px solid var(--kv-hair);
}
.kv-footer__brand{
  font-family:var(--kv-serif);font-size:clamp(23px,2.8vw,32px);
  letter-spacing:.06em;color:var(--kv-paper);text-decoration:none;
}
.kv-footer__brand:hover{color:var(--kv-cyan)}
.kv-footer__summary{max-width:48ch;font-size:14.5px;line-height:1.9;color:#A9C0D0;margin:0}
.kv-footer__cols{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));
  gap:clamp(24px,3vw,40px);padding:clamp(26px,4vw,40px) 0;
}
.kv-footer__col{min-width:0}
.kv-footer__title{
  font-size:11.5px;font-weight:800;letter-spacing:.2em;text-transform:uppercase;
  color:var(--kv-cyan);margin:0 0 14px;
}
.kv-footer__list{display:grid;gap:9px}
.kv-footer__link{
  display:inline-block;color:#C3D6E2;font-size:14.5px;text-decoration:none;
  border-bottom:1px solid transparent;padding-bottom:1px;
  transition:color .18s var(--kv-ease),border-color .18s var(--kv-ease);
}
.kv-footer__link:hover{color:var(--kv-paper);border-bottom-color:var(--kv-cyan)}
.kv-footer__contact{font-size:13.5px;line-height:1.95;color:#A9C0D0;margin:0 0 6px;max-width:34ch}
.kv-footer__contact .kv-mono{color:var(--kv-paper);font-size:12.5px;word-break:break-all}
.kv-footer__address{color:#8FA9BC}
.kv-footer__more{
  display:inline-block;margin-top:10px;font-size:13px;font-weight:700;
  color:var(--kv-orange);text-decoration:none;
  border-bottom:1px solid rgba(255,138,61,.55);padding-bottom:2px;
}
.kv-footer__more:hover{border-bottom-color:var(--kv-orange)}
.kv-footer__base{
  display:flex;flex-wrap:wrap;gap:10px 26px;align-items:center;justify-content:space-between;
  padding-top:20px;border-top:1px solid var(--kv-hair);
  font-family:var(--kv-mono);font-size:12px;letter-spacing:.04em;color:#87A2B5;
}
.kv-footer__legal,.kv-footer__copy{margin:0;max-width:none}
@media (max-width:600px){
  .kv-footer__masthead{gap:12px}
  .kv-footer__base{justify-content:flex-start}
}
/* ---------- shared content components ---------- */
.kv-container{width:100%;max-width:var(--kv-w);margin-inline:auto;padding-inline:var(--kv-gutter)}
.kv-section{padding-block:clamp(44px,7vw,96px)}
.kv-section--paper{background:var(--kv-paper)}
.kv-section--deep{background:var(--kv-deep);color:var(--kv-mist)}
.kv-section--deep h1,.kv-section--deep h2,.kv-section--deep h3{color:var(--kv-paper)}
.kv-section--band{background:var(--kv-night);color:var(--kv-mist)}
.kv-section--band h1,.kv-section--band h2,.kv-section--band h3{color:var(--kv-paper)}
.kv-eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--kv-mono);font-size:12px;letter-spacing:.22em;text-transform:uppercase;
  color:var(--kv-steel);margin-bottom:14px;
}
.kv-eyebrow::before{content:"";width:26px;height:1px;background:currentColor;flex:0 0 auto}
.kv-section--deep .kv-eyebrow,.kv-section--band .kv-eyebrow{color:var(--kv-cyan)}
.kv-rule{height:1px;border:0;background:var(--kv-line);margin-block:clamp(26px,4vw,46px)}
.kv-tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:999px;
  border:1px solid var(--kv-line);background:var(--kv-paper);
  font-family:var(--kv-mono);font-size:11.5px;letter-spacing:.1em;color:var(--kv-night);
}
.kv-tag--accent{border-color:rgba(255,138,61,.6);background:rgba(255,138,61,.12);color:#A64208}
.kv-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:13px 26px;border-radius:999px;border:1px solid transparent;
  font-family:var(--kv-sans);font-size:15px;font-weight:800;letter-spacing:.04em;
  text-decoration:none;cursor:pointer;
  transition:transform .2s var(--kv-ease),background-color .2s var(--kv-ease),border-color .2s var(--kv-ease);
}
.kv-btn:hover{transform:translateY(-1px)}
.kv-btn--accent{background:var(--kv-orange);color:#2A1305;box-shadow:0 16px 28px -22px rgba(255,138,61,.95)}
.kv-btn--accent:hover{background:#FF9E5C}
.kv-btn--cyan{background:var(--kv-cyan);color:#04252A}
.kv-btn--cyan:hover{background:#5CEAEC}
.kv-btn--ghost{background:transparent;border-color:var(--kv-line);color:var(--kv-deep)}
.kv-btn--ghost:hover{border-color:var(--kv-deep);background:rgba(45,226,230,.12)}
.kv-section--deep .kv-btn--ghost,.kv-section--band .kv-btn--ghost{color:var(--kv-mist);border-color:rgba(221,231,238,.4)}
.kv-section--deep .kv-btn--ghost:hover,.kv-section--band .kv-btn--ghost:hover{color:var(--kv-paper);border-color:var(--kv-cyan)}
.kv-breadcrumb{font-family:var(--kv-mono);font-size:12px;letter-spacing:.06em;color:var(--kv-steel);margin-bottom:clamp(18px,3vw,30px)}
.kv-breadcrumb__list{display:flex;flex-wrap:wrap;align-items:center;gap:8px;list-style:none}
.kv-breadcrumb__item{display:inline-flex;align-items:center;gap:8px}
.kv-breadcrumb__item + .kv-breadcrumb__item::before{content:"/";opacity:.55}
.kv-breadcrumb__link{color:var(--kv-night);text-decoration:none;border-bottom:1px solid transparent}
.kv-breadcrumb__link:hover{border-bottom-color:var(--kv-cyan)}
.kv-breadcrumb__current{color:var(--kv-ink)}
.kv-prose{max-width:68ch;font-size:17px;line-height:1.9;color:var(--kv-ink)}
.kv-prose > * + *{margin-top:1em}
.kv-prose h2,.kv-prose h3{line-height:1.36;margin-top:1.7em}
.kv-prose h2{font-size:clamp(23px,2.6vw,32px)}
.kv-prose h3{font-size:clamp(19px,2vw,23px)}
.kv-prose ul{display:grid;gap:.55em}
.kv-prose li{position:relative;padding-left:1.4em}
.kv-prose li::before{content:"";position:absolute;left:0;top:.82em;width:9px;height:1px;background:var(--kv-cyan)}
.kv-prose a{color:var(--kv-night);text-decoration:none;border-bottom:1px solid var(--kv-cyan)}
.kv-prose a:hover{color:var(--kv-deep);border-bottom-width:2px}
.kv-prose strong{color:var(--kv-deep)}
.kv-prose .kv-mono{color:var(--kv-night)}
.kv-grid{display:grid;gap:clamp(16px,2.4vw,28px)}
.kv-grid--two{grid-template-columns:repeat(2,minmax(0,1fr))}
.kv-grid--three{grid-template-columns:repeat(3,minmax(0,1fr))}
.kv-card{
  background:var(--kv-paper);border:1px solid var(--kv-line);
  border-radius:var(--kv-radius-m);padding:clamp(18px,2.4vw,28px);
  box-shadow:var(--kv-shadow);min-width:0;
}
.kv-table-wrap{
  overflow-x:auto;border:1px solid var(--kv-line);
  border-radius:var(--kv-radius-m);background:var(--kv-paper);
  -webkit-overflow-scrolling:touch;
}
.kv-table{width:100%;min-width:560px;border-collapse:collapse;font-size:15px;line-height:1.65}
.kv-table caption{
  caption-side:top;text-align:left;padding:14px 16px;
  font-family:var(--kv-mono);font-size:11.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--kv-steel);
}
.kv-table th,.kv-table td{padding:12px 16px;text-align:left;border-bottom:1px solid var(--kv-line);vertical-align:top}
.kv-table thead th{
  background:var(--kv-night);color:var(--kv-paper);
  font-size:12px;font-weight:800;letter-spacing:.12em;white-space:nowrap;
}
.kv-table tbody tr:nth-child(even){background:rgba(221,231,238,.45)}
.kv-table tbody tr:hover{background:rgba(45,226,230,.12)}
.kv-table tbody th{color:var(--kv-deep);font-weight:700}
.kv-table .kv-mono{font-size:14px;color:var(--kv-night);white-space:nowrap}
.kv-figure{display:grid;gap:10px;margin:0;min-width:0}
.kv-figure__frame{
  position:relative;overflow:hidden;
  aspect-ratio:16/10;
  border-radius:var(--kv-radius-l);
  border:1px solid var(--kv-line);
  background:linear-gradient(150deg,var(--kv-night),var(--kv-deep));
}
.kv-figure__img{display:block;width:100%;height:100%;object-fit:cover;border-radius:inherit}
.kv-figure__caption{font-family:var(--kv-mono);font-size:11.5px;letter-spacing:.06em;color:var(--kv-steel)}
.kv-figure--wide .kv-figure__frame{aspect-ratio:21/9}
.kv-figure--tall .kv-figure__frame{aspect-ratio:4/5;border-radius:var(--kv-radius-m)}
.kv-figure--square .kv-figure__frame{aspect-ratio:1/1}
.kv-figure--grid .kv-figure__frame::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.5;
  background-image:
    repeating-linear-gradient(0deg,rgba(45,226,230,.18) 0 1px,transparent 1px 32px),
    repeating-linear-gradient(90deg,rgba(45,226,230,.18) 0 1px,transparent 1px 32px);
}
.kv-figure--grid .kv-figure__frame::after{
  content:"";position:absolute;right:18px;bottom:18px;width:34%;height:1px;background:var(--kv-orange);opacity:.7;
}
[data-spy-link]{text-decoration:none;transition:color .18s var(--kv-ease),box-shadow .18s var(--kv-ease)}
[data-spy-link][aria-current="true"]{
  color:var(--kv-deep);box-shadow:inset 0 -2px 0 var(--kv-cyan);
}
@media (max-width:980px){
  .kv-grid--three{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:860px){
  body{font-size:16px}
  .kv-grid--two,.kv-grid--three{grid-template-columns:minmax(0,1fr)}
  .kv-figure--wide .kv-figure__frame{aspect-ratio:16/10}
  .kv-figure--tall .kv-figure__frame{aspect-ratio:4/5}
  .kv-prose{font-size:16px}
}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .kv-btn:hover,.kv-nav__cta:hover{transform:none}
}