:root{
  --ink:#061A33;
  --ink-2:#0B2545;
  --ink-3:#0F3B4A;
  --moon:#F7F4EA;
  --gold:#F2B84B;
  --gold-soft:#FFE3A3;
  --jade:#4DD6B3;
  --mist:#A9C4E4;
  --edge:#253B57;
  --coral:#FF8E7A;
  --paper:#EDE8DA;
  --paper-line:#D8D2C2;
  --ink-soft:#43536B;
  --header-h:72px;
  --wrap:1320px;
  --gutter:24px;
  --cut:14px;
  --font-body:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Heiti SC",system-ui,sans-serif;
  --font-title:var(--font-body);
}

*,*::before,*::after{box-sizing:border-box}
html{
  -webkit-text-size-adjust:100%;
  overflow-x:clip;
  scroll-padding-top:calc(var(--header-h) + 20px);
}
@media (prefers-reduced-motion:no-preference){html{scroll-behavior:smooth}}
body,h1,h2,h3,h4,h5,p,figure,blockquote,dl,dd,ol,ul{margin:0}
ol,ul{padding:0;list-style:none}
img,svg,video{display:block;max-width:100%;height:auto}
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-soft);outline-offset:3px}

body{
  min-height:100vh;
  background-color:var(--ink);
  background-image:
    radial-gradient(70% 55% at 88% -12%,rgba(242,184,75,.10),transparent 70%),
    radial-gradient(60% 45% at 4% 108%,rgba(77,214,179,.07),transparent 72%);
  background-repeat:no-repeat;
  background-attachment:fixed;
  color:var(--moon);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.75;
  letter-spacing:.012em;
  -webkit-font-smoothing:antialiased;
}

h1,h2,h3,h4{font-family:var(--font-title);font-weight:900;line-height:1.12;letter-spacing:-.012em}
h1{font-size:clamp(38px,7vw,76px)}
h2{font-size:clamp(28px,4.4vw,44px)}
h3{font-size:clamp(20px,2.4vw,26px);letter-spacing:0}

.wrap{width:min(var(--wrap),calc(100% - 48px));margin-inline:auto}
.prose{max-width:38em}

/* ---------- skip link ---------- */
.skip-link{
  position:absolute;
  left:16px;
  top:-80px;
  z-index:200;
  padding:12px 22px;
  background:var(--gold);
  color:var(--ink);
  font-size:13px;
  font-weight:800;
  letter-spacing:.06em;
  transition:top .18s ease;
}
.skip-link:focus{top:12px}

/* ---------- header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:100;
  background:rgba(6,26,51,.94);
  -webkit-backdrop-filter:blur(16px);
  backdrop-filter:blur(16px);
  border-bottom:1px solid var(--edge);
  transition:border-color .2s ease;
}
.site-header[data-open="true"]{border-bottom-color:var(--gold)}
.site-header__inner{
  position:relative;
  width:min(var(--wrap),calc(100% - 40px));
  margin-inline:auto;
  min-height:var(--header-h);
  padding-block:10px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
}
.site-header__brand{
  display:flex;
  align-items:center;
  gap:16px;
  min-width:0;
}

/* ---------- brand ---------- */
.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  min-width:0;
}
.brand__mark{
  position:relative;
  display:block;
  width:26px;
  height:28px;
  flex:none;
}
.brand__line{
  position:absolute;
  left:2px;
  top:2px;
  width:2px;
  height:24px;
  background:var(--moon);
  transform:rotate(14deg);
  transform-origin:top center;
}
.brand__dot{
  position:absolute;
  right:1px;
  bottom:1px;
  width:11px;
  height:11px;
  border-radius:50%;
  background:var(--gold);
  box-shadow:0 0 0 4px rgba(242,184,75,.14);
}
.brand__type{display:flex;flex-direction:column;line-height:1.15;min-width:0}
.brand__name{font-size:18px;font-weight:900;letter-spacing:.02em;white-space:nowrap}
.brand__short{font-size:10px;font-weight:700;letter-spacing:.42em;color:var(--mist);margin-top:3px}
.brand--lg .brand__name{font-size:21px}
.brand--lg .brand__mark{width:30px;height:32px}
.brand--lg .brand__line{height:28px}
.brand__note{
  display:none;
  padding-left:16px;
  border-left:1px solid var(--edge);
  font-size:10.5px;
  letter-spacing:.34em;
  color:var(--mist);
  white-space:nowrap;
}

/* ---------- nav toggle ---------- */
.nav-toggle{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex:none;
  padding:9px 13px;
  border:1px solid var(--edge);
  background:var(--ink-2);
  color:var(--moon);
  font-size:10.5px;
  font-weight:700;
  letter-spacing:.26em;
  transition:border-color .2s ease,color .2s ease;
}
.nav-toggle:hover{border-color:var(--gold);color:var(--gold-soft)}
.nav-toggle__bars{display:grid;gap:4px;width:20px;flex:none}
.nav-toggle__bars span{
  display:block;
  height:2px;
  width:100%;
  background:var(--gold);
  transition:transform .22s ease,opacity .18s ease;
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
.nav-toggle__label{white-space:nowrap}

/* ---------- nav (mobile drawer first) ---------- */
.site-nav{
  position:fixed;
  top:var(--header-h);
  right:0;
  z-index:99;
  width:min(88vw,360px);
  height:calc(100vh - var(--header-h));
  height:calc(100dvh - var(--header-h));
  overflow-y:auto;
  display:flex;
  flex-direction:column;
  gap:6px;
  padding:24px 20px 40px;
  background:var(--ink-2);
  border-left:1px solid var(--edge);
  box-shadow:-24px 0 60px rgba(0,0,0,.35);
  transform:translateX(103%);
  visibility:hidden;
  transition:transform .28s cubic-bezier(.4,0,.2,1),visibility .28s;
}
.site-nav[data-open="true"]{transform:translateX(0);visibility:visible}
.site-nav__list{display:flex;flex-direction:column;width:100%;gap:1px}
.site-nav__item{display:flex;min-width:0}
.site-nav__link{
  position:relative;
  display:flex;
  align-items:baseline;
  gap:10px;
  width:100%;
  padding:14px 10px;
  border-bottom:1px solid rgba(37,59,87,.7);
  font-size:16px;
  font-weight:700;
  color:var(--moon);
  transition:color .18s ease,background .18s ease;
}
.site-nav__num{
  flex:none;
  min-width:26px;
  font-size:11px;
  font-weight:700;
  letter-spacing:.16em;
  color:var(--mist);
  font-variant-numeric:tabular-nums;
}
.site-nav__text{white-space:nowrap}
.site-nav__link:hover{color:var(--gold-soft);background:rgba(247,244,234,.05)}
.site-nav__link[aria-current="page"]{color:var(--gold)}
.site-nav__link[aria-current="page"] .site-nav__num{color:var(--gold)}
.site-nav__link[aria-current="page"]::after{
  content:"";
  position:absolute;
  left:10px;
  right:10px;
  bottom:6px;
  height:2px;
  background:var(--gold);
}
.site-nav__cta{width:100%;margin-top:20px}

/* ---------- progress ---------- */
.progress{
  position:absolute;
  left:0;
  right:0;
  bottom:-1px;
  height:2px;
  background:rgba(169,196,228,.14);
  overflow:hidden;
}
.progress__bar{
  display:block;
  height:100%;
  width:0;
  background:linear-gradient(90deg,var(--gold),var(--jade));
}

/* ---------- buttons ---------- */
.btn{
  --cut:12px;
  position:relative;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  padding:13px 26px;
  border:1px solid transparent;
  font-size:14px;
  font-weight:800;
  line-height:1.2;
  letter-spacing:.06em;
  text-align:center;
  clip-path:polygon(var(--cut) 0,100% 0,100% calc(100% - var(--cut)),calc(100% - var(--cut)) 100%,0 100%,0 var(--cut));
  transition:background .2s ease,color .2s ease,border-color .2s ease,transform .2s ease;
}
.btn--gold{background:var(--gold);color:var(--ink)}
.btn--gold:hover{background:var(--gold-soft)}
.btn--ghost{background:transparent;border-color:var(--edge);color:var(--moon)}
.btn--ghost:hover{border-color:var(--gold);color:var(--gold-soft)}
.btn--sm{--cut:9px;padding:9px 18px;font-size:12.5px}
.btn:focus-visible{outline:none}
.btn:focus-visible::after{
  content:"";
  position:absolute;
  inset:3px;
  border:2px solid var(--ink);
  pointer-events:none;
}
.btn--ghost:focus-visible::after{border-color:var(--gold-soft)}

/* ---------- footer ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(48px,7vw,96px);
  background-color:var(--ink-2);
  background-image:radial-gradient(45% 70% at 92% -25%,rgba(242,184,75,.14),transparent 70%);
  border-top:1px solid var(--edge);
  color:var(--moon);
}
.site-footer::before{
  content:"";
  position:absolute;
  left:0;
  top:0;
  height:3px;
  width:100%;
  background:linear-gradient(90deg,var(--gold) 0 92px,var(--jade) 92px 122px,transparent 122px);
}
.site-footer__inner{
  width:min(var(--wrap),calc(100% - 48px));
  margin-inline:auto;
  padding-block:clamp(46px,6vw,76px) 0;
}
.site-footer__top{
  display:grid;
  gap:clamp(32px,4vw,56px);
  grid-template-columns:minmax(0,1fr);
}
.site-footer__brand{min-width:0}
.site-footer__intro{
  margin-top:22px;
  max-width:34em;
  font-size:15px;
  line-height:1.85;
  color:var(--mist);
}
.site-footer__cols{
  display:grid;
  gap:clamp(28px,3.5vw,40px);
  grid-template-columns:repeat(2,minmax(0,1fr));
  min-width:0;
}
.footer-links{display:grid;gap:16px;align-content:start;min-width:0}
.footer-links__title{
  font-size:10.5px;
  font-weight:800;
  letter-spacing:.32em;
  color:var(--gold);
}
.footer-links__list{display:grid;gap:11px}
.footer-link{
  display:inline-flex;
  align-items:center;
  gap:9px;
  justify-self:start;
  font-size:15px;
  color:var(--moon);
  transition:color .18s ease;
}
.footer-link::before{
  content:"";
  width:9px;
  height:1px;
  flex:none;
  background:var(--edge);
  transition:width .2s ease,background .2s ease;
}
.footer-link:hover{color:var(--gold-soft)}
.footer-link:hover::before{width:18px;background:var(--gold)}

.footer-contact{
  grid-column:1 / -1;
  display:grid;
  gap:18px;
  align-content:start;
  padding-top:clamp(22px,3vw,28px);
  border-top:1px solid var(--edge);
  min-width:0;
}
.footer-contact__grid{
  display:grid;
  gap:20px 28px;
  grid-template-columns:minmax(0,1fr);
}
.footer-contact__row{display:grid;gap:5px;align-content:start;min-width:0}
.footer-contact__label{
  font-size:10.5px;
  font-weight:700;
  letter-spacing:.28em;
  color:var(--mist);
}
.footer-contact__value{
  font-size:15px;
  font-weight:600;
  line-height:1.6;
  color:var(--moon);
  overflow-wrap:anywhere;
}
.footer-contact__value--email{color:var(--gold-soft);font-variant-numeric:tabular-nums;letter-spacing:.03em}
.footer-contact__row .btn{justify-self:start;margin-top:8px}
.footer-contact__note{
  max-width:34em;
  font-size:12.5px;
  line-height:1.8;
  color:var(--mist);
}
.copy-status{
  min-height:1.3em;
  font-size:12px;
  font-weight:700;
  letter-spacing:.04em;
  color:var(--jade);
}
.copy-status[data-state="error"]{color:var(--coral)}

.site-footer__bottom{
  margin-top:clamp(34px,4.5vw,54px);
  padding-block:24px 34px;
  border-top:1px solid var(--edge);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px 28px;
}
.footer-legal{
  display:flex;
  flex-wrap:wrap;
  gap:8px 0;
  font-size:12px;
  letter-spacing:.08em;
  color:var(--mist);
}
.footer-legal__item{position:relative;display:inline-flex;align-items:center;gap:6px}
.footer-legal__item + .footer-legal__item{padding-left:20px}
.footer-legal__item + .footer-legal__item::before{
  content:"";
  position:absolute;
  left:0;
  top:50%;
  width:1px;
  height:11px;
  transform:translateY(-50%);
  background:var(--edge);
}
.footer-note{font-size:12px;letter-spacing:.04em;color:var(--mist)}

/* ---------- sections ---------- */
.section{padding-block:clamp(52px,8vw,104px)}
.section--tight{padding-block:clamp(34px,5vw,60px)}
.section--moon{background:var(--moon);color:var(--ink)}
.section--moon .lede,.section--moon .card__text,.section--moon .index-list__note,.section--moon .figure__caption{color:var(--ink-soft)}
.section--moon .kicker{color:#8A6413}
.section--moon .tag{border-color:var(--paper-line);color:var(--ink-soft)}
.section--moon .panel,.section--moon .card{background:#FFFDF6;border-color:var(--paper-line)}
.section--moon .index-list,.section--moon .index-list__item{border-color:var(--paper-line)}

.kicker{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:10.5px;
  font-weight:800;
  letter-spacing:.34em;
  color:var(--gold);
}
.kicker::before{content:"";width:26px;height:2px;flex:none;background:currentColor}
.section-head{
  display:grid;
  gap:14px;
  max-width:62ch;
  margin-bottom:clamp(26px,4vw,46px);
}
.section-title{font-size:clamp(28px,4.4vw,44px)}
.lede{
  max-width:38em;
  font-size:16.5px;
  line-height:1.8;
  color:var(--mist);
}

/* ---------- panels & cards ---------- */
.panel{
  position:relative;
  background:var(--ink-2);
  border:1px solid var(--edge);
  padding:clamp(22px,3vw,34px);
  min-width:0;
}
.panel--cut{
  --cut:18px;
  clip-path:polygon(var(--cut) 0,100% 0,100% calc(100% - var(--cut)),calc(100% - var(--cut)) 100%,0 100%,0 var(--cut));
}
.panel--moon{background:var(--moon);color:var(--ink);border-color:var(--paper-line)}
.card{
  display:flex;
  flex-direction:column;
  gap:12px;
  padding:clamp(20px,2.6vw,30px);
  background:var(--ink-2);
  border:1px solid var(--edge);
  min-width:0;
  transition:transform .25s ease,border-color .25s ease;
}
.card:hover{transform:translate(-2px,-2px);border-color:var(--gold)}
.card__num{
  font-size:clamp(38px,5vw,56px);
  font-weight:900;
  line-height:1;
  letter-spacing:-.03em;
  color:var(--gold);
  font-variant-numeric:tabular-nums;
}
.card__title{font-size:20px;font-weight:800;line-height:1.35}
.card__text{font-size:15px;line-height:1.75;color:var(--mist)}

/* ---------- grids ---------- */
.grid{display:grid;gap:var(--gutter)}
.grid--2,.grid--3,.grid--split{display:grid;gap:var(--gutter);grid-template-columns:minmax(0,1fr)}
@media (min-width:720px){
  .grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (min-width:1024px){
  .grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
  .grid--split{grid-template-columns:minmax(0,1.35fr) minmax(0,1fr)}
}

/* ---------- index list ---------- */
.index-list{display:grid;border-top:1px solid var(--edge)}
.index-list__item{
  display:flex;
  align-items:baseline;
  gap:16px;
  padding:15px 4px;
  border-bottom:1px solid var(--edge);
  transition:background .2s ease,padding-left .2s ease;
}
.index-list__item:hover{background:rgba(247,244,234,.045);padding-left:12px}
.index-list__num{
  flex:none;
  min-width:34px;
  font-size:11.5px;
  font-weight:800;
  letter-spacing:.2em;
  color:var(--gold);
  font-variant-numeric:tabular-nums;
}
.index-list__label{font-size:16px;font-weight:700;line-height:1.5}
.index-list__note{margin-left:auto;font-size:12px;color:var(--mist);white-space:nowrap}

/* ---------- tags ---------- */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:5px 10px;
  border:1px solid var(--edge);
  font-size:10.5px;
  font-weight:700;
  letter-spacing:.16em;
  color:var(--mist);
}
.tag--gold{color:var(--gold);border-color:rgba(242,184,75,.5)}
.tag--jade{color:var(--jade);border-color:rgba(77,214,179,.5)}
.tag--coral{color:var(--coral);border-color:rgba(255,142,122,.5)}

/* ---------- vertical annotation ---------- */
.note-v{
  writing-mode:vertical-rl;
  font-size:10.5px;
  font-weight:700;
  letter-spacing:.4em;
  color:var(--mist);
}

/* ---------- figure ---------- */
.figure{display:grid;gap:12px;margin:0;min-width:0}
.figure__frame{
  position:relative;
  aspect-ratio:16 / 10;
  overflow:hidden;
  background:linear-gradient(135deg,var(--ink-2),var(--ink-3) 55%,var(--ink));
  border:1px solid var(--edge);
}
.figure__frame img{width:100%;height:100%;object-fit:cover}
.figure__frame::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,transparent 55%,rgba(6,26,51,.72));
  pointer-events:none;
}
.figure__caption{font-size:12px;letter-spacing:.1em;color:var(--mist)}
.section--moon .figure__frame{border-color:var(--paper-line)}

/* ---------- rules ---------- */
.rule{height:1px;border:0;background:var(--edge)}
.rule--accent{
  height:3px;
  background:linear-gradient(90deg,var(--gold) 0 12%,var(--jade) 12% 18%,var(--edge) 18% 100%);
}

/* ---------- breadcrumb ---------- */
.crumb{padding-block:22px;border-bottom:1px solid rgba(37,59,87,.65)}
.crumb__list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
  font-size:11.5px;
  letter-spacing:.14em;
  color:var(--mist);
}
.crumb__item{display:inline-flex;align-items:center;gap:10px}
.crumb__link{color:var(--mist);transition:color .18s ease}
.crumb__link:hover{color:var(--gold-soft)}
.crumb__sep{color:var(--edge)}
.crumb__current{color:var(--moon);font-weight:700}

/* ---------- tabs ---------- */
.tabs{min-width:0}
.tablist{
  display:flex;
  flex-wrap:wrap;
  gap:4px;
  padding:5px;
  background:var(--ink-2);
  border:1px solid var(--edge);
}
.tab{
  position:relative;
  padding:11px 20px;
  font-size:14px;
  font-weight:700;
  letter-spacing:.04em;
  color:var(--mist);
  transition:color .18s ease,background .18s ease;
}
.tab:hover{color:var(--moon);background:rgba(247,244,234,.06)}
.tab[aria-selected="true"]{background:var(--gold);color:var(--ink)}
.tabpanel{padding-top:clamp(22px,3vw,32px)}
.tabpanel[hidden]{display:none}

/* ---------- reveal ---------- */
[data-reveal-state="pending"]{
  opacity:0;
  transform:translateY(20px);
  transition:opacity .7s ease,transform .7s ease;
}
[data-reveal-state="shown"]{
  opacity:1;
  transform:none;
  transition:opacity .7s ease,transform .7s ease;
}

/* ---------- responsive ---------- */
@media (min-width:720px){
  .footer-contact__grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (min-width:960px){
  .site-footer__top{grid-template-columns:minmax(0,.95fr) minmax(0,1.35fr)}
  .footer-contact__grid{grid-template-columns:repeat(3,minmax(0,1fr))}
  .brand__note{display:block}
}
@media (min-width:1024px){
  .nav-toggle{display:none}
  .site-nav{
    position:static;
    transform:none;
    visibility:visible;
    height:auto;
    width:auto;
    overflow:visible;
    flex-direction:row;
    align-items:center;
    gap:6px;
    padding:0;
    background:none;
    border:0;
    box-shadow:none;
    transition:none;
  }
  .site-nav__list{flex-direction:row;gap:2px;width:auto}
  .site-nav__item{display:block}
  .site-nav__link{
    width:auto;
    padding:10px 12px;
    border-bottom:0;
    font-size:14px;
  }
  .site-nav__link[aria-current="page"]::after{left:12px;right:12px;bottom:3px}
  .site-nav__cta{width:auto;margin:0 0 0 14px}
}
@media (min-width:1200px){
  .site-nav__num{display:inline}
  .site-nav__link{font-size:14.5px;padding:10px 14px}
}

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