*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0}
h1,h2,h3,h4,p,figure,blockquote,dl,dd{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img,svg,picture,video{display:block;max-width:100%}
a{color:inherit}
button{font:inherit;color:inherit}
address{font-style:normal}

:root{
  --ink-900:#05192B;
  --ink-800:#0B2A42;
  --ink-700:#1E2833;
  --paper:#F2EDE3;
  --cyan:#4FE3D0;
  --cyan-soft:#9BE9DE;
  --coral:#FF7A59;
  --text-dark:#D6E4EC;
  --text-on-paper:#101922;
  --muted:#7F94A3;
  --line:rgba(79,227,208,.16);
  --line-strong:rgba(79,227,208,.36);
  --line-soft:rgba(214,228,236,.12);
  --bar:44px;
  --rail:88px;
  --bar-m:32px;
  --rail-m:56px;
  --edge:clamp(16px,4vw,44px);
  --sheet:1240px;
  --font-display:"HarmonyOS Sans SC","Noto Sans SC",-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-data:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --ease:cubic-bezier(.22,.61,.36,1);
}

body{
  min-height:100vh;
  padding:var(--bar) 0 0 var(--rail);
  background-color:var(--ink-900);
  background-image:
    radial-gradient(120% 80% at 100% 0%,rgba(79,227,208,.07),transparent 62%),
    radial-gradient(90% 60% at 0% 100%,rgba(255,122,89,.05),transparent 66%);
  color:var(--text-dark);
  font-family:var(--font-display);
  font-size:16px;
  line-height:1.8;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}

h1,h2,h3{font-weight:300;line-height:1.18;letter-spacing:.02em;word-break:break-word}
p{word-break:break-word}

:focus-visible{outline:2px solid var(--cyan);outline-offset:3px}

.visually-hidden{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap;border:0}
.mono{font-family:var(--font-data);font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1}

/* ---------- skip link ---------- */
.skip-link{
  position:fixed;top:8px;left:8px;z-index:200;
  transform:translateY(-180%);
  padding:10px 18px;
  background:var(--cyan);
  color:var(--ink-900);
  font-family:var(--font-data);font-size:12px;letter-spacing:.14em;
  text-decoration:none;
  transition:transform .22s var(--ease);
}
.skip-link:focus{transform:translateY(0)}

/* ---------- header shell ---------- */
.site-header{position:relative;z-index:95}

.topbar{
  position:fixed;top:0;left:0;right:0;height:var(--bar);z-index:90;
  display:flex;align-items:center;gap:clamp(14px,2.4vw,36px);
  padding:0 var(--edge) 0 calc(var(--rail) + var(--edge));
  background:rgba(5,25,43,.94);
  border-bottom:1px solid var(--line);
  font-family:var(--font-data);
  font-size:11px;letter-spacing:.16em;
  color:var(--muted);
  white-space:nowrap;
}
.topbar__pulse{display:flex;align-items:center;gap:9px;color:var(--cyan-soft)}
.topbar__dot{
  width:6px;height:6px;border-radius:50%;
  background:var(--coral);
  box-shadow:0 0 0 3px rgba(255,122,89,.18);
  animation:kypulse 2.6s ease-in-out infinite;
}
@keyframes kypulse{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.35;transform:scale(.72)}}
.topbar__meta{color:var(--muted)}
.topbar__meta .mono{color:var(--text-dark)}
.topbar__link{
  margin-left:auto;
  color:var(--cyan-soft);
  text-decoration:none;
  padding-bottom:2px;
  border-bottom:1px solid rgba(79,227,208,.35);
  transition:color .25s var(--ease),border-color .25s var(--ease);
}
.topbar__link:hover{color:var(--cyan);border-bottom-color:var(--cyan)}

.scroll-progress{
  position:fixed;top:var(--bar);left:var(--rail);right:0;height:2px;z-index:96;
  transform:scaleX(0);transform-origin:0 50%;
  background:linear-gradient(90deg,var(--cyan),var(--coral));
  pointer-events:none;
}

/* ---------- left rail ---------- */
.rail{
  position:fixed;top:var(--bar);left:0;bottom:0;width:var(--rail);z-index:95;
  display:flex;flex-direction:column;align-items:center;gap:clamp(10px,2vh,22px);
  padding:24px 0 20px;
  background:linear-gradient(180deg,var(--ink-800),#071E31 55%,var(--ink-900));
  border-right:1px solid var(--line);
  overflow-y:auto;overflow-x:hidden;
}
.rail__brand{
  display:flex;flex-direction:column;align-items:center;gap:14px;
  color:var(--paper);text-decoration:none;
  transition:color .25s var(--ease);
}
.rail__brand:hover{color:var(--cyan-soft)}
.rail__mark{
  writing-mode:vertical-rl;
  font-family:var(--font-data);font-size:11px;letter-spacing:.42em;
  color:var(--cyan);
}
.rail__tag{
  writing-mode:vertical-rl;
  font-size:11px;letter-spacing:.3em;
  color:var(--muted);
}
.rail__brand:hover .rail__tag{color:var(--cyan-soft)}

.rail__nav{flex:1 1 auto;min-height:0;display:flex;align-items:center;justify-content:center}
.nav-list{display:flex;flex-direction:column;align-items:center;gap:clamp(8px,1.5vh,16px)}
.nav-item{display:flex}
.nav-link{
  position:relative;display:block;
  writing-mode:vertical-rl;
  padding:4px 2px;
  font-size:12px;letter-spacing:.26em;
  color:var(--text-dark);text-decoration:none;
  transition:color .25s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:50%;bottom:-6px;
  width:0;height:2px;background:var(--coral);
  transform:translateX(-50%);
  transition:width .28s var(--ease);
}
.nav-link:hover,.nav-link:focus-visible{color:var(--cyan-soft)}
.nav-link:hover::after{width:12px;background:var(--cyan-soft)}
.nav-link[aria-current="page"]{color:var(--cyan)}
.nav-link[aria-current="page"]::after{width:14px;background:var(--coral)}

.rail__cta{
  writing-mode:vertical-rl;
  display:inline-block;
  padding:16px 9px;
  font-size:12px;letter-spacing:.22em;
  color:var(--cyan);text-decoration:none;
  border:1px solid rgba(79,227,208,.45);
  background:rgba(79,227,208,.07);
  transition:background .25s var(--ease),color .25s var(--ease),border-color .25s var(--ease);
}
.rail__cta:hover{background:var(--cyan);border-color:var(--cyan);color:var(--ink-900)}

.nav-toggle{
  display:none;
  width:42px;height:42px;padding:0;
  align-items:center;justify-content:center;
  border:1px solid var(--line-strong);
  background:rgba(79,227,208,.07);
  color:var(--cyan);
  border-radius:0;
  cursor:pointer;
  transition:background .25s var(--ease),border-color .25s var(--ease);
}
.nav-toggle:hover{background:rgba(79,227,208,.16);border-color:var(--cyan)}
.nav-toggle__bars{display:flex;flex-direction:column;gap:5px;width:18px}
.nav-toggle__bar{display:block;height:1.5px;background:currentColor;transition:transform .3s var(--ease),opacity .2s var(--ease)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1){transform:translateY(6.5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3){transform:translateY(-6.5px) rotate(-45deg)}

/* ---------- shared page primitives ---------- */
.container{width:100%;max-width:var(--sheet);margin-inline:auto;padding-inline:var(--edge)}
.container--narrow{max-width:740px}

.section{padding-block:clamp(44px,7vw,96px)}
.section--paper{background:var(--paper);color:var(--text-on-paper)}
.section--paper .eyebrow{color:#0B6A60}
.section--paper .note{color:#4C5C68}
.section--paper .btn{color:#0B6A60;border-color:rgba(11,106,96,.4)}
.section--paper .btn:hover{background:rgba(11,106,96,.1);color:#08544C;border-color:#0B6A60}

.eyebrow{
  font-family:var(--font-data);font-size:12px;letter-spacing:.22em;
  color:var(--cyan-soft);margin-bottom:16px;
}
.note{font-size:13px;line-height:1.6;color:var(--muted)}

.btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:12px 22px;
  font-family:var(--font-data);font-size:12px;letter-spacing:.16em;
  text-decoration:none;border:1px solid var(--line-strong);
  background:transparent;color:var(--cyan-soft);
  border-radius:0;cursor:pointer;
  transition:background .25s var(--ease),color .25s var(--ease),border-color .25s var(--ease);
}
.btn:hover{background:rgba(79,227,208,.12);color:var(--cyan);border-color:var(--cyan)}
.btn--primary{background:var(--cyan);border-color:var(--cyan);color:var(--ink-900)}
.btn--primary:hover{background:var(--cyan-soft);border-color:var(--cyan-soft);color:var(--ink-900)}
.btn--warm{border-color:rgba(255,122,89,.5);color:var(--coral)}
.btn--warm:hover{background:rgba(255,122,89,.12);border-color:var(--coral);color:var(--coral)}

.breadcrumb{padding-top:20px;font-family:var(--font-data);font-size:11px;letter-spacing:.14em;color:var(--muted)}
.breadcrumb__list{display:flex;flex-wrap:wrap;align-items:center;gap:10px}
.breadcrumb__item{display:flex;align-items:center;gap:10px}
.breadcrumb__item + .breadcrumb__item::before{content:"/";color:rgba(127,148,163,.55)}
.breadcrumb__link{color:var(--muted);text-decoration:none;transition:color .25s var(--ease)}
.breadcrumb__link:hover{color:var(--cyan)}
.breadcrumb__current{color:var(--text-dark)}

.grid{display:grid;gap:clamp(16px,2.4vw,32px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--rail{grid-template-columns:minmax(0,62fr) minmax(0,22fr) minmax(0,16fr)}

.panel{
  padding:clamp(18px,2.4vw,28px);
  border:1px solid var(--line);
  background:rgba(30,40,51,.62);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
}
.panel--data{background:var(--ink-700);border-color:rgba(214,228,236,.1);backdrop-filter:none;-webkit-backdrop-filter:none}
.panel--paper{background:var(--paper);color:var(--text-on-paper);border-color:rgba(16,25,34,.14);backdrop-filter:none;-webkit-backdrop-filter:none}

.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 8px;
  font-family:var(--font-data);font-size:10px;letter-spacing:.18em;
  color:var(--cyan-soft);border:1px solid var(--line-strong);
}
.tag--warm{color:var(--coral);border-color:rgba(255,122,89,.45)}

.media-frame{
  position:relative;overflow:hidden;
  aspect-ratio:16 / 9;
  background:linear-gradient(135deg,var(--ink-800),var(--ink-900));
  border:1px solid var(--line);
}
.media-frame--wide{aspect-ratio:21 / 9}
.media-frame--square{aspect-ratio:1 / 1}
.media-frame img{width:100%;height:100%;object-fit:cover;filter:saturate(.82) contrast(1.06) hue-rotate(-6deg)}
.media-frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:
    repeating-linear-gradient(0deg,rgba(79,227,208,.09) 0 1px,transparent 1px 3px),
    linear-gradient(180deg,rgba(5,25,43,.28),transparent 45%,rgba(5,25,43,.42));
}

/* ---------- reveal protocol ---------- */
.has-reveal [data-reveal]{
  opacity:0;
  transform:translateY(18px);
  transition:opacity .7s var(--ease),transform .7s var(--ease);
  transition-delay:var(--reveal-delay,0ms);
}
.has-reveal [data-reveal][data-revealed]{opacity:1;transform:none}

/* ---------- footer ---------- */
.site-footer{
  margin-top:clamp(56px,8vw,110px);
  padding:clamp(40px,5.5vw,76px) var(--edge) 26px;
  border-top:1px solid var(--line);
  color:var(--text-dark);
  background-color:var(--ink-900);
  background-image:
    repeating-linear-gradient(90deg,rgba(79,227,208,.055) 0 1px,transparent 1px 76px),
    repeating-linear-gradient(0deg,rgba(79,227,208,.055) 0 1px,transparent 1px 76px),
    linear-gradient(180deg,rgba(11,42,66,.96),var(--ink-900) 68%);
}
.footer__grid{
  max-width:var(--sheet);margin-inline:auto;
  display:grid;
  grid-template-columns:minmax(0,1.15fr) minmax(0,1.35fr) minmax(0,1fr);
  gap:clamp(24px,4vw,60px);
  align-items:start;
}
.footer__logo{font-size:clamp(18px,2vw,22px);font-weight:300;letter-spacing:.1em;color:var(--paper)}
.footer__tag{margin-top:10px;font-family:var(--font-data);font-size:11px;letter-spacing:.18em;color:var(--cyan-soft)}
.footer__note{margin-top:14px;max-width:26em;font-size:13px;line-height:1.7;color:var(--muted)}

.footer__cols{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:clamp(18px,2.4vw,32px)}
.footer__title{
  margin:0 0 16px;
  font-family:var(--font-data);font-size:11px;font-weight:400;
  letter-spacing:.24em;color:var(--cyan-soft);
}
.footer__list{display:grid;gap:10px}
.footer__link{
  display:inline-block;
  font-size:14px;color:var(--text-dark);text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .25s var(--ease),border-color .25s var(--ease);
}
.footer__link:hover{color:var(--cyan);border-bottom-color:rgba(79,227,208,.5)}

.footer__address{display:block}
.footer__kv{display:block;margin-bottom:12px}
.footer__kv-k{
  display:block;
  font-family:var(--font-data);font-size:10px;letter-spacing:.2em;
  color:var(--muted);margin-bottom:2px;
}
.footer__kv-v{display:block;font-size:13px;color:var(--text-dark);word-break:break-word}
.footer__reply{
  margin-top:16px;padding-left:12px;
  border-left:1px solid var(--line-strong);
  font-size:12px;line-height:1.7;color:var(--muted);
}
.footer__legal{
  max-width:var(--sheet);margin:clamp(28px,4vw,48px) auto 0;
  padding-top:18px;border-top:1px solid var(--line-soft);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px 28px;
  font-family:var(--font-data);font-size:11px;letter-spacing:.12em;color:var(--muted);
}
.footer__legal-item{color:var(--muted)}

/* ---------- responsive ---------- */
@media (max-width:1080px){
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid--rail{grid-template-columns:minmax(0,1fr) minmax(0,220px)}
}
@media (max-width:900px){
  .footer__grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer__contact{grid-column:1 / -1}
}
@media (max-width:960px){
  body{padding:calc(var(--bar-m) + var(--rail-m)) 0 0}
  body.nav-open{overflow:hidden}
  .topbar{
    height:var(--bar-m);
    padding:0 var(--edge);
    font-size:10px;letter-spacing:.1em;
    gap:12px;
  }
  .topbar__meta{display:none}
  .scroll-progress{top:calc(var(--bar-m) + var(--rail-m));left:0}
  .rail{
    top:var(--bar-m);right:0;bottom:auto;left:0;width:100%;height:var(--rail-m);
    flex-direction:row;align-items:center;justify-content:flex-start;
    gap:12px;
    padding:0 var(--edge);
    border-right:0;border-bottom:1px solid var(--line);
    overflow:visible;
  }
  .rail__brand{flex-direction:row;align-items:center;gap:10px;margin-right:auto}
  .rail__mark,.rail__tag{writing-mode:horizontal-tb;font-size:11px;letter-spacing:.18em}
  .rail__cta{
    writing-mode:horizontal-tb;
    padding:8px 12px;
    font-size:11px;letter-spacing:.1em;
    white-space:nowrap;
  }
  .rail__nav{
    position:fixed;top:calc(var(--bar-m) + var(--rail-m));right:0;bottom:0;left:0;
    display:block;
    padding:26px var(--edge) 48px;
    background:linear-gradient(180deg,var(--ink-800),var(--ink-900) 62%);
    border-top:1px solid var(--line);
    opacity:0;visibility:hidden;transform:translateY(-12px);
    pointer-events:none;
    overflow-y:auto;
    transition:opacity .3s var(--ease),transform .3s var(--ease),visibility .3s var(--ease);
    z-index:92;
  }
  .rail__nav[data-open]{opacity:1;visibility:visible;transform:none;pointer-events:auto}
  .nav-list{width:100%;flex-direction:column;align-items:stretch;gap:0}
  .nav-item{display:block}
  .nav-item + .nav-item{border-top:1px solid rgba(214,228,236,.1)}
  .nav-link{
    writing-mode:horizontal-tb;
    display:block;width:100%;
    padding:16px 0;
    font-size:clamp(20px,5.4vw,26px);letter-spacing:.08em;
  }
  .nav-link::after{
    left:auto;right:2px;top:50%;bottom:auto;
    width:0;height:2px;transform:translateY(-50%);
  }
  .nav-link:hover::after{width:14px}
  .nav-link[aria-current="page"]::after{width:12px}
  .nav-toggle{display:inline-flex}
}
@media (max-width:760px){
  .grid--2,.grid--3,.grid--rail{grid-template-columns:minmax(0,1fr)}
  .footer__legal{flex-direction:column}
}
@media (max-width:620px){
  .footer__grid{grid-template-columns:minmax(0,1fr)}
  .footer__cols{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (min-width:961px) and (max-height:880px){
  .rail{padding:14px 0;gap:10px}
  .rail__brand{gap:8px}
  .nav-list{gap:6px}
  .nav-link{font-size:11px;letter-spacing:.18em}
  .rail__cta{padding:12px 7px;font-size:11px;letter-spacing:.16em}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.01ms!important;
    animation-iteration-count:1!important;
    transition-duration:.01ms!important;
    scroll-behavior:auto!important;
  }
  .has-reveal [data-reveal]{opacity:1;transform:none}
  .scroll-progress{transition:none}
  .topbar__dot{animation:none}
}