/* ===== 0. Reset ===== */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,blockquote,dl,dt,dd{margin:0}
ul,ol{padding:0;list-style:none}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
a{color:inherit;text-decoration:none}
img,svg,video{display:block;max-width:100%}
table{border-collapse:collapse;width:100%}
[hidden]{display:none!important}

/* ===== 1. Tokens ===== */
:root{
  --deep:#061A2E;
  --blue:#0B2A4A;
  --blue-mid:#124B7A;
  --blue-bright:#1E6FA8;
  --orange:#FF6A1A;
  --orange-soft:#FFB067;
  --mint:#2FD4B4;
  --mint-mist:#A8E9DC;
  --paper:#F4F7FB;
  --ink:#0E1720;
  --slate:#55677A;
  --white:#FFFFFF;
  --radius-s:10px;
  --radius-m:16px;
  --radius-l:26px;
  --shadow-1:0 8px 22px rgba(6,26,46,.10);
  --shadow-2:0 18px 44px rgba(6,26,46,.22);
  --ease:cubic-bezier(.22,.61,.36,1);
  --shell:1240px;
  --gutter:clamp(20px,5vw,56px);
  --header-h:84px;
  --font-sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"IBM Plex Mono","JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}

/* ===== 2. Base typography ===== */
body{
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.75;
  font-weight:400;
  letter-spacing:.01em;
  color:var(--ink);
  background:var(--paper);
  padding-top:var(--header-h);
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4,h5{font-weight:900;line-height:1.16;letter-spacing:-.012em;color:var(--ink)}
h1{font-size:clamp(34px,5vw,56px)}
h2{font-size:clamp(26px,3.4vw,40px)}
h3{font-size:clamp(21px,2.2vw,28px)}
h4{font-size:clamp(18px,1.6vw,20px)}
strong{font-weight:700}
small{font-size:13px}
.mono{font-family:var(--font-mono);letter-spacing:.08em}
.muted{color:var(--slate)}

/* ===== 3. Layout utilities ===== */
.shell{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.section{padding-block:clamp(56px,7vw,104px)}
.section--tight{padding-block:clamp(36px,4vw,64px)}
.section--dark{background:var(--blue);color:rgba(255,255,255,.82)}
.section--dark h1,.section--dark h2,.section--dark h3,.section--dark h4{color:#fff}
.hero-bleed{margin-top:calc(-1 * var(--header-h))}
.stack>*+*{margin-top:18px}
.divider{height:1px;border:0;background:linear-gradient(90deg,rgba(47,212,180,.55),rgba(47,212,180,0));margin-block:clamp(28px,4vw,48px)}
.grid-12{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:clamp(16px,2.2vw,28px);
}
.grid-12>*{min-width:0}

/* ===== 4. Buttons / chips / tags ===== */
.btn{
  --btn-bg:var(--orange);
  --btn-fg:#fff;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:13px 24px;
  border-radius:999px;
  background:var(--btn-bg);
  color:var(--btn-fg);
  font-size:15px;
  font-weight:700;
  letter-spacing:.02em;
  white-space:nowrap;
  box-shadow:0 8px 20px rgba(255,106,26,.26);
  transition:transform .16s var(--ease),box-shadow .16s var(--ease),background .16s var(--ease),color .16s var(--ease);
}
.btn:hover{background:var(--orange-soft);transform:translateY(-2px);box-shadow:0 14px 28px rgba(255,106,26,.32)}
.btn:active{transform:translateY(0)}
.btn--sm{padding:10px 18px;font-size:14px}
.btn--dark{--btn-bg:var(--blue);box-shadow:none}
.btn--dark:hover{background:var(--blue-mid);box-shadow:0 12px 26px rgba(11,42,74,.28)}
.btn--quiet{--btn-bg:var(--mint);--btn-fg:var(--deep);box-shadow:none}
.btn--quiet:hover{background:var(--mint-mist);box-shadow:0 10px 22px rgba(47,212,180,.3)}
.btn--ghost{--btn-bg:transparent;--btn-fg:#fff;box-shadow:inset 0 0 0 1px rgba(168,233,220,.5)}
.btn--ghost:hover{background:rgba(47,212,180,.16);box-shadow:inset 0 0 0 1px rgba(168,233,220,.8)}
.chip{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:7px 15px;
  border-radius:999px;
  font-size:13.5px;
  font-weight:500;
  color:var(--slate);
  background:#fff;
  border:1px solid rgba(14,23,32,.16);
  transition:color .16s var(--ease),border-color .16s var(--ease),background .16s var(--ease);
}
.chip:hover{color:var(--blue);border-color:var(--blue-bright)}
.chip[aria-pressed="true"],.chip.is-active{background:var(--orange);border-color:var(--orange);color:#fff}
.data-tag{
  display:inline-flex;
  align-items:center;
  gap:9px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--blue-mid);
}
.data-tag::before{
  content:"";
  width:8px;height:8px;
  border-radius:50%;
  background:var(--mint);
  box-shadow:0 0 0 3px rgba(47,212,180,.18);
}

/* ===== 5. Exhibit label ===== */
.exhibit{display:flex;align-items:center;gap:12px;margin-bottom:18px}
.exhibit__index{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.14em;
  line-height:1.5;
  color:var(--blue-mid);
  border:1px solid rgba(30,111,168,.45);
  border-radius:999px;
  padding:3px 11px;
}
.exhibit__label{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.2em;
  color:var(--slate);
}
.exhibit__side{
  writing-mode:vertical-rl;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.28em;
  color:var(--slate);
}
.exhibit--invert .exhibit__index{color:var(--mint);border-color:rgba(47,212,180,.55)}
.exhibit--invert .exhibit__label,.exhibit--invert .exhibit__side{color:var(--mint-mist)}

/* ===== 6. Panels ===== */
.panel{
  background:#fff;
  border:1px solid rgba(14,23,32,.06);
  border-radius:var(--radius-m);
  padding:clamp(20px,2.4vw,32px);
  box-shadow:var(--shadow-1);
  transition:transform .18s var(--ease),box-shadow .18s var(--ease);
}
.panel:hover{transform:translateY(-4px);box-shadow:var(--shadow-2)}
.glass-card{
  background:rgba(168,233,220,.13);
  border:1px solid rgba(168,233,220,.32);
  border-radius:var(--radius-l);
  padding:clamp(20px,2.6vw,34px);
  color:#fff;
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
}

/* ===== 7. Media frames ===== */
.media-frame{
  position:relative;
  display:block;
  overflow:hidden;
  border-radius:var(--radius-m);
  background:linear-gradient(150deg,var(--blue) 0%,var(--deep) 100%);
  isolation:isolate;
}
.media-frame>img{width:100%;height:100%;object-fit:cover;filter:saturate(1.05) contrast(1.04)}
.media-frame__scrim{
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(6,26,46,.10) 0%,rgba(6,26,46,.74) 100%);
  pointer-events:none;
}
.media-frame--wide{aspect-ratio:16/9}
.media-frame--tall{aspect-ratio:3/4}
.media-frame--portrait{aspect-ratio:4/5}
.media-frame--square{aspect-ratio:1/1}

/* ===== 8. Prose ===== */
.prose{max-width:40em;font-size:17px;line-height:1.78;color:var(--ink)}
.prose>*+*{margin-top:1.05em}
.prose h2{font-size:clamp(24px,3vw,32px);margin-top:1.8em}
.prose h3{font-size:clamp(19px,2vw,22px);margin-top:1.5em}
.prose ul{padding-left:0}
.prose ul li{position:relative;padding-left:22px}
.prose ul li+li{margin-top:.5em}
.prose ul li::before{
  content:"";
  position:absolute;
  left:2px;top:.78em;
  width:9px;height:2px;
  background:var(--orange);
}
.prose a{color:var(--blue-bright);border-bottom:1px solid rgba(30,111,168,.35)}
.prose a:hover{color:var(--orange);border-color:rgba(255,106,26,.5)}
.prose blockquote{border-left:3px solid var(--mint);padding-left:18px;color:var(--slate)}

/* ===== 9. Breadcrumb ===== */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
  padding-block:18px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--slate);
}
.breadcrumb li{display:flex;align-items:center;gap:10px}
.breadcrumb li+li::before{content:"/";color:rgba(85,103,122,.5)}
.breadcrumb a{color:var(--blue-bright)}
.breadcrumb a:hover{color:var(--orange)}

/* ===== 10. Header ===== */
.skip-link{
  position:fixed;
  left:16px;
  top:-72px;
  z-index:200;
  padding:11px 20px;
  border-radius:0 0 12px 12px;
  background:var(--orange);
  color:#fff;
  font-weight:700;
  font-size:14px;
  transition:top .18s var(--ease);
}
.skip-link:focus{top:0}
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:120;
  background:linear-gradient(180deg,rgba(6,26,46,.90) 0%,rgba(6,26,46,.48) 62%,rgba(6,26,46,0) 100%);
  transition:background .24s var(--ease),box-shadow .24s var(--ease);
}
.site-header[data-state="solid"]{
  background:var(--deep);
  box-shadow:0 1px 0 rgba(47,212,180,.22),0 14px 34px rgba(6,26,46,.34);
}
.site-header__shell{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.site-header__inner{
  display:flex;
  align-items:center;
  gap:clamp(14px,2.6vw,36px);
  height:var(--header-h);
  transition:height .24s var(--ease);
}
.site-header[data-state="solid"] .site-header__inner{height:64px}
.brand{display:flex;align-items:center;gap:12px;flex:0 0 auto;margin-right:auto}
.brand__mark{
  position:relative;
  flex:0 0 auto;
  width:40px;height:40px;
  border-radius:12px;
  background:linear-gradient(150deg,var(--blue-bright),var(--blue));
  box-shadow:inset 0 0 0 1px rgba(168,233,220,.34);
}
.brand__mark::before{
  content:"";
  position:absolute;
  left:50%;top:9px;bottom:9px;
  width:3px;
  margin-left:-1.5px;
  border-radius:2px;
  background:var(--mint);
}
.brand__mark::after{
  content:"";
  position:absolute;
  left:9px;right:9px;bottom:9px;
  height:3px;
  border-radius:2px;
  background:var(--orange);
}
.brand__text{display:flex;flex-direction:column;line-height:1.2}
.brand__name{font-size:20px;font-weight:900;letter-spacing:.06em;color:#fff}
.brand__tag{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  color:var(--mint-mist);
}
.site-nav{display:flex;align-items:center;gap:clamp(4px,1.2vw,10px)}
.nav-list{display:flex;align-items:center;gap:clamp(2px,1vw,6px)}
.nav-link{
  position:relative;
  display:inline-block;
  padding:10px 12px;
  border-radius:10px;
  font-size:15px;
  font-weight:500;
  color:rgba(255,255,255,.86);
  transition:color .16s var(--ease),background .16s var(--ease);
}
.nav-link::after{
  content:"";
  position:absolute;
  left:12px;right:12px;bottom:5px;
  height:2px;
  border-radius:2px;
  background:var(--mint);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .2s var(--ease);
}
.nav-link:hover{color:#fff;background:rgba(255,255,255,.07)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link[aria-current="page"]{color:#fff;font-weight:700}
.nav-link[aria-current="page"]::after{transform:scaleX(1)}
.nav-quick{display:none}
.site-header__actions{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.nav-toggle{
  display:none;
  width:44px;height:44px;
  align-items:center;
  justify-content:center;
  border-radius:12px;
  background:rgba(255,255,255,.07);
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.28);
}
.nav-toggle__bars{position:relative;display:block;width:20px;height:12px}
.nav-toggle__bars span{
  position:absolute;left:0;right:0;
  height:2px;border-radius:2px;background:#fff;
  transition:transform .2s var(--ease),opacity .16s var(--ease);
}
.nav-toggle__bars span:nth-child(1){top:0}
.nav-toggle__bars span:nth-child(2){top:5px}
.nav-toggle__bars span:nth-child(3){top:10px}
.site-header[data-nav-open="true"] .nav-toggle__bars span:nth-child(1){transform:translateY(5px) rotate(45deg)}
.site-header[data-nav-open="true"] .nav-toggle__bars span:nth-child(2){opacity:0}
.site-header[data-nav-open="true"] .nav-toggle__bars span:nth-child(3){transform:translateY(-5px) rotate(-45deg)}
.scroll-progress{
  position:absolute;
  left:0;bottom:0;
  width:100%;height:2px;
  transform:scaleX(var(--p,0));
  transform-origin:left;
  background:linear-gradient(90deg,var(--mint),var(--orange));
  opacity:0;
  transition:opacity .2s var(--ease);
}
.site-header[data-state="solid"] .scroll-progress{opacity:1}

/* ===== 11. Footer ===== */
.site-footer{
  position:relative;
  background:var(--deep);
  color:rgba(255,255,255,.72);
  overflow:hidden;
}
.site-footer::before{
  content:"";
  position:absolute;
  inset:0 0 auto 0;
  height:1px;
  background:linear-gradient(90deg,rgba(47,212,180,0) 0%,rgba(47,212,180,.7) 50%,rgba(47,212,180,0) 100%);
}
.site-footer__glow{
  position:absolute;
  right:-14%;bottom:-46%;
  width:560px;height:560px;
  background:radial-gradient(circle at 50% 50%,rgba(47,212,180,.22),rgba(47,212,180,0) 62%);
  pointer-events:none;
}
.site-footer__grid{
  position:relative;
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1.3fr;
  gap:clamp(24px,3.4vw,52px);
  padding-block:clamp(48px,6vw,84px);
}
.footer-brand__mark{
  position:relative;
  display:block;
  width:30px;height:30px;
  border-radius:9px;
  margin-bottom:14px;
  background:linear-gradient(150deg,var(--blue-bright),var(--blue));
  box-shadow:inset 0 0 0 1px rgba(168,233,220,.3);
}
.footer-brand__mark::after{
  content:"";
  position:absolute;
  left:50%;top:7px;bottom:7px;
  width:2px;margin-left:-1px;
  border-radius:2px;
  background:var(--mint);
}
.footer-brand__name{font-size:19px;font-weight:900;letter-spacing:.06em;color:#fff}
.footer-brand__desc{margin-top:10px;font-size:14.5px;line-height:1.8;max-width:30em;color:rgba(255,255,255,.66)}
.footer-brand__meta{
  margin-top:14px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  color:var(--mint);
}
.footer-col__title{
  margin-bottom:16px;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:500;
  letter-spacing:.16em;
  color:var(--mint);
}
.footer-list li+li{margin-top:10px}
.footer-list a{
  position:relative;
  display:inline-block;
  padding-bottom:2px;
  font-size:15px;
  color:rgba(255,255,255,.78);
  transition:color .16s var(--ease);
}
.footer-list a::after{
  content:"";
  position:absolute;
  left:0;bottom:0;
  width:100%;height:1px;
  background:var(--mint);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .2s var(--ease);
}
.footer-list a:hover{color:#fff}
.footer-list a:hover::after{transform:scaleX(1)}
.footer-contact li{display:flex;flex-direction:column;gap:3px}
.footer-contact li+li{margin-top:14px}
.footer-contact__k{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--mint-mist);
  opacity:.85;
}
.footer-contact__v{
  font-family:var(--font-mono);
  font-size:14px;
  line-height:1.6;
  color:rgba(255,255,255,.9);
  word-break:break-word;
}
.site-footer__bottom{
  position:relative;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px 28px;
  padding-block:22px 30px;
  border-top:1px solid rgba(255,255,255,.12);
  font-size:13px;
}
.footer-legal{
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.06em;
  color:rgba(255,255,255,.55);
}

/* ===== 12. Disclosure & reveal ===== */
.qa-item{border-bottom:1px solid rgba(14,23,32,.1);padding-block:4px}
.qa-item__trigger{
  display:flex;
  align-items:center;
  gap:14px;
  width:100%;
  padding:18px 0;
  text-align:left;
  font-size:17px;
  font-weight:500;
  color:var(--ink);
}
.qa-item__trigger::before{
  content:"";
  flex:0 0 auto;
  width:10px;height:10px;
  border-radius:50%;
  background:rgba(85,103,122,.4);
  transition:background .16s var(--ease),box-shadow .16s var(--ease);
}
.qa-item__trigger:hover::before{background:var(--mint)}
.qa-item__trigger[aria-expanded="true"]::before{background:var(--mint);box-shadow:0 0 0 4px rgba(47,212,180,.2)}
.qa-item__panel{
  padding:0 0 22px 24px;
  font-size:16px;
  line-height:1.78;
  color:var(--slate);
  animation:panel-in .22s var(--ease) both;
}
@keyframes panel-in{from{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:none}}
.has-js [data-reveal]{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .42s var(--ease),transform .42s var(--ease);
  transition-delay:var(--reveal-delay,0ms);
}
.has-js [data-reveal].is-visible{opacity:1;transform:none}

/* ===== 13. Focus & reduced motion ===== */
:focus-visible{outline:2px solid var(--mint);outline-offset:3px;border-radius:4px}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms!important;
    animation-iteration-count:1!important;
    transition-duration:.001ms!important;
  }
}

/* ===== 14. Responsive ===== */
@media (max-width:1080px){
  .site-footer__grid{grid-template-columns:1fr 1fr}
}
@media (max-width:1000px){
  :root{--header-h:68px}
  .nav-toggle{display:inline-flex}
  .nav-cta{display:none}
  .site-header[data-state="solid"] .site-header__inner{height:56px}
  .site-nav{
    position:fixed;
    left:0;right:0;
    top:var(--header-h);
    max-height:calc(100vh - var(--header-h));
    overflow-y:auto;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    margin:0;
    padding:16px var(--gutter) 30px;
    background:var(--deep);
    border-top:1px solid rgba(47,212,180,.22);
    box-shadow:0 26px 46px rgba(6,26,46,.44);
    opacity:0;
    visibility:hidden;
    transform:translateY(-10px);
    transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s var(--ease);
  }
  .site-header[data-state="solid"] .site-nav{top:56px}
  .site-nav[data-open="true"]{opacity:1;visibility:visible;transform:none}
  .nav-list{flex-direction:column;align-items:stretch;gap:2px}
  .nav-link{
    padding:14px 4px;
    font-size:17px;
    border-radius:8px;
    border-bottom:1px solid rgba(255,255,255,.07);
  }
  .nav-link::after{display:none}
  .nav-link[aria-current="page"]{color:var(--mint)}
  .nav-quick{
    display:flex;
    flex-wrap:wrap;
    align-items:center;
    gap:10px;
    margin-top:18px;
  }
  .nav-quick__title{
    flex:1 0 100%;
    font-family:var(--font-mono);
    font-size:11px;
    letter-spacing:.18em;
    color:var(--mint-mist);
    margin-bottom:2px;
  }
  .nav-quick__link{
    display:inline-flex;
    align-items:center;
    padding:9px 16px;
    border-radius:999px;
    font-size:14px;
    font-weight:700;
    color:var(--deep);
    background:var(--mint);
  }
  .nav-quick__link:hover{background:var(--mint-mist)}
  .grid-12{grid-template-columns:repeat(6,minmax(0,1fr))}
}
@media (max-width:720px){
  body{font-size:16px}
  .brand__mark{width:36px;height:36px}
  .brand__name{font-size:18px}
  .site-footer__grid{grid-template-columns:1fr}
  .site-footer__bottom{flex-direction:column;align-items:flex-start}
}
@media (max-width:520px){
  .brand__tag{display:none}
  .footer-brand__desc{font-size:14px}
}