*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:112px;}
body,h1,h2,h3,h4,h5,h6,p,ul,ol,li,figure,figcaption,dl,dt,dd,blockquote{margin:0;}
ul,ol{padding:0;list-style:none;}
img,svg,picture,video{display:block;max-width:100%;height:auto;}
a{color:inherit;text-decoration:none;}
button,input,select,textarea{font:inherit;color:inherit;}
button{background:none;border:0;padding:0;cursor:pointer;}
:focus-visible{outline:2px solid var(--cinnabar);outline-offset:3px;}

:root{
  --indigo:#16233F;
  --indigo-deep:#0C1526;
  --indigo-mid:#2E4675;
  --cinnabar:#B23A2E;
  --cinnabar-light:#D9634F;
  --ochre:#B78A3F;
  --turquoise:#3C7A71;
  --paper:#F4EEE3;
  --paper-shade:#E4DAC7;
  --paper-white:#FFFFFF;
  --ink:#1B1A17;
  --slate:#66748C;

--serif:"Noto Serif SC","Source Han Serif SC","Songti SC",STSong,"SimSun",serif;
  --sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --mono:ui-monospace,"IBM Plex Mono","SFMono-Regular",Menlo,Consolas,monospace;

--rail:240px;
  --measure:34em;
  --ease:cubic-bezier(.2,.6,.2,1);
  --hairline:1px solid rgba(46,70,117,.26);
  --shadow-sheet:0 2px 0 -1px var(--paper-shade),0 3px 0 -1px rgba(46,70,117,.16),0 22px 42px -32px rgba(12,21,38,.8);
}

body{
  font-family:var(--sans);
  font-size:16px;
  line-height:1.9;
  letter-spacing:.01em;
  color:var(--ink);
  background-color:var(--paper);
  background-image:
    radial-gradient(circle at 14% 8%,rgba(183,138,63,.09),transparent 52%),
    radial-gradient(circle at 88% 82%,rgba(46,70,117,.08),transparent 58%);
  background-attachment:fixed;
  min-height:100vh;
  -webkit-font-smoothing:antialiased;
}

h1,h2,h3,h4{
  font-family:var(--serif);
  font-weight:900;
  line-height:1.16;
  letter-spacing:-.01em;
  color:var(--indigo);
}
h1{font-size:clamp(44px,7vw,104px);letter-spacing:-.02em;}
h2{font-size:clamp(25px,3vw,39px);}
h3{font-size:clamp(20px,2.2vw,25px);}
p{max-width:var(--measure);}
strong{font-weight:700;color:var(--indigo);}

.wrap{width:100%;max-width:1180px;margin-inline:auto;padding-inline:clamp(20px,5vw,64px);}
.section{padding-block:clamp(32px,5vw,72px);}
.section + .section{border-top:var(--hairline);}

.eyebrow{
  display:inline-flex;align-items:center;gap:.6em;
  font-family:var(--mono);font-size:12px;font-weight:500;
  letter-spacing:.16em;text-transform:uppercase;color:var(--cinnabar);
}
.tag{
  display:inline-block;padding:3px 9px;
  background:var(--ochre);color:var(--indigo-deep);
  font-family:var(--sans);font-size:12px;font-weight:500;letter-spacing:.14em;
}
.rule-scale{
  height:16px;
  background-image:repeating-linear-gradient(90deg,rgba(46,70,117,.55) 0 1px,transparent 1px 14px);
  border-bottom:1px solid rgba(46,70,117,.4);
}
.num{
  font-family:var(--mono);font-variant-numeric:tabular-nums;
  letter-spacing:.04em;line-height:1;color:var(--indigo);
}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.6em;
  padding:.78em 1.5em;border:1px solid var(--indigo);
  font-family:var(--sans);font-size:14px;font-weight:500;letter-spacing:.12em;
  background:transparent;color:var(--indigo);cursor:pointer;
  transition:background .24s var(--ease),color .24s var(--ease),border-color .24s var(--ease);
}
.btn:hover{background:var(--indigo);color:var(--paper);border-color:var(--indigo);}
.btn--primary{background:var(--cinnabar);border-color:var(--cinnabar);color:var(--paper-white);}
.btn--primary:hover{background:var(--cinnabar-light);border-color:var(--cinnabar-light);color:var(--indigo-deep);}
.btn--ghost{border-color:var(--indigo-mid);color:var(--indigo);}
.btn--ghost:hover{background:var(--indigo-mid);color:var(--paper);}

.breadcrumbs{
  padding-block:18px 0;
  font-family:var(--mono);font-size:12px;letter-spacing:.08em;color:var(--slate);
}
.breadcrumbs ol{display:flex;flex-wrap:wrap;gap:.4em;list-style:none;}
.breadcrumbs li + li::before{content:"/";margin-right:.4em;color:var(--indigo-mid);}
.breadcrumbs a{border-bottom:1px solid transparent;transition:color .2s var(--ease),border-color .2s var(--ease);}
.breadcrumbs a:hover{color:var(--cinnabar);border-bottom-color:var(--cinnabar-light);}

.prose p,.prose ul,.prose ol{max-width:var(--measure);}
.prose p + p{margin-top:1.05em;}
.prose ul,.prose ol{margin-top:.9em;}
.prose li{padding-left:1.6em;position:relative;}
.prose li + li{margin-top:.5em;}
.prose li::before{content:"—";position:absolute;left:0;color:var(--ochre);}
.prose h2{margin-top:1.8em;margin-bottom:.5em;}
.prose h3{margin-top:1.4em;margin-bottom:.4em;}
.prose a{color:var(--cinnabar);text-decoration:underline;text-underline-offset:.25em;text-decoration-thickness:1px;}
.prose a:hover{color:var(--cinnabar-light);}

.media-figure{margin:0;display:grid;gap:10px;}
.media-figure figcaption{
  font-family:var(--mono);font-size:12px;letter-spacing:.08em;color:var(--slate);
}
.media-frame{
  position:relative;overflow:hidden;
  aspect-ratio:4 / 3;
  background-color:var(--paper-shade);
  background-image:repeating-linear-gradient(135deg,rgba(46,70,117,.07) 0 1px,transparent 1px 12px);
  border:1px solid rgba(46,70,117,.24);
  box-shadow:0 1px 0 rgba(255,255,255,.7) inset,0 20px 34px -28px rgba(12,21,38,.85);
  transition:transform .3s var(--ease),box-shadow .3s var(--ease);
}
.media-frame > img,.media-frame > picture,.media-frame > picture > img{width:100%;height:100%;object-fit:cover;}
.media-frame:hover{transform:rotate(.5deg);box-shadow:0 1px 0 rgba(255,255,255,.7) inset,0 28px 44px -28px rgba(12,21,38,.9);}
.media-frame--wide{aspect-ratio:16 / 9;}
.media-frame--tall{aspect-ratio:3 / 4;}

.sheet{
  background:var(--paper-white);
  border:1px solid rgba(46,70,117,.22);
  box-shadow:var(--shadow-sheet);
  padding:clamp(20px,3vw,34px);
}

.index-table{width:100%;border-collapse:collapse;font-size:15px;line-height:1.7;}
.index-table caption{
  caption-side:top;text-align:left;padding-bottom:10px;
  font-family:var(--mono);font-size:12px;letter-spacing:.12em;color:var(--slate);
}
.index-table th,.index-table td{
  text-align:left;vertical-align:top;
  padding:12px 14px;border-bottom:1px solid rgba(46,70,117,.18);
}
.index-table thead th{
  font-family:var(--mono);font-size:12px;font-weight:500;
  letter-spacing:.14em;color:var(--indigo);border-bottom:1px solid var(--indigo-mid);
}
.index-table tbody tr:nth-child(even){background:rgba(228,218,199,.5);}
.index-table td:first-child{
  width:68px;font-family:var(--mono);letter-spacing:.08em;color:var(--cinnabar);
}

.skip-link{
  position:fixed;left:50%;top:0;z-index:200;
  transform:translate(-50%,-140%);
  padding:10px 20px;
  background:var(--indigo-deep);color:var(--paper);
  font-size:13px;letter-spacing:.12em;
  transition:transform .2s var(--ease);
}
.skip-link:focus{transform:translate(-50%,0);}

.site-header{
  position:sticky;top:0;z-index:80;
  display:grid;
  grid-template-columns:var(--rail) minmax(0,1fr);
  background:var(--paper);
  border-bottom:1px solid rgba(46,70,117,.32);
  box-shadow:0 14px 26px -24px rgba(12,21,38,.95);
}

.brand-rail{
  position:relative;overflow:hidden;
  display:flex;flex-direction:column;gap:6px;
  padding:16px 28px 18px 20px;
  background-color:var(--indigo);
  background-image:linear-gradient(160deg,rgba(12,21,38,.55),rgba(22,35,63,0) 70%);
  color:var(--paper);
}
.brand-rail::after{
  content:"";position:absolute;top:14px;bottom:14px;right:8px;width:8px;
  background-image:repeating-linear-gradient(180deg,rgba(183,138,63,.85) 0 1px,transparent 1px 12px);
  opacity:.7;pointer-events:none;
}
.brand-rail__mark{
  font-family:var(--serif);font-weight:900;
  font-size:clamp(20px,1.9vw,26px);line-height:1.2;letter-spacing:.06em;
  color:var(--paper);
  transition:color .2s var(--ease);
}
.brand-rail__mark:hover{color:var(--ochre);}
.brand-rail__tagline{
  font-size:11px;letter-spacing:.16em;line-height:1.6;
  color:rgba(244,238,227,.72);max-width:none;
}
.brand-rail__index{
  margin-top:auto;
  font-family:var(--mono);font-size:11px;letter-spacing:.1em;
  color:var(--ochre);max-width:none;
}
.brand-rail__num{
  font-family:var(--mono);font-size:38px;line-height:1;letter-spacing:.02em;
  color:var(--cinnabar-light);
}

.header-bar{
  display:flex;align-items:center;gap:clamp(12px,2vw,28px);
  padding:12px clamp(16px,3vw,40px);
  min-height:84px;min-width:0;
}
.header-bar__stamp{
  flex:0 0 auto;
  font-family:var(--mono);font-size:11px;letter-spacing:.16em;
  color:var(--indigo);white-space:nowrap;
  padding:5px 10px;border:1px solid var(--ochre);
  background:rgba(183,138,63,.12);max-width:none;
}
.header-bar__tools{display:flex;align-items:center;gap:10px;flex:0 0 auto;}

.site-nav{margin-left:auto;min-width:0;}
.site-nav__head{display:none;}
.site-nav__title{
  font-family:var(--mono);font-size:12px;letter-spacing:.18em;
  color:var(--ochre);max-width:none;
}
.site-nav__list{display:flex;flex-wrap:wrap;align-items:center;gap:clamp(8px,1.4vw,24px);}
.site-nav__list a{
  position:relative;
  display:inline-flex;align-items:baseline;gap:.45em;
  padding:6px 2px 9px;
  color:var(--indigo);font-size:14px;font-weight:500;letter-spacing:.08em;
  border-bottom:1px solid transparent;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.site-nav__num{
  font-family:var(--mono);font-size:11px;font-weight:400;
  letter-spacing:.1em;color:var(--slate);
  transition:color .2s var(--ease);
}
.site-nav__list a:hover{color:var(--cinnabar);}
.site-nav__list a:hover .site-nav__num{color:var(--cinnabar-light);}
.site-nav__list a[aria-current="page"]{color:var(--cinnabar);}
.site-nav__list a[aria-current="page"] .site-nav__num{color:var(--cinnabar);}
.site-nav__list a[aria-current="page"]::after{
  content:"";position:absolute;left:0;right:0;bottom:-1px;height:2px;
  background:linear-gradient(90deg,var(--cinnabar),var(--ochre));
}

.nav-toggle{
  display:none;align-items:center;gap:8px;
  padding:9px 13px;
  border:1px solid rgba(46,70,117,.55);
  color:var(--indigo);
  font-family:var(--mono);font-size:12px;letter-spacing:.16em;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.nav-toggle:hover,.nav-toggle[aria-expanded="true"]{
  background:var(--indigo);color:var(--paper);border-color:var(--indigo);
}
.nav-toggle__bars{position:relative;display:inline-block;width:14px;height:2px;background:currentColor;}
.nav-toggle__bars::before{content:"";position:absolute;left:0;right:0;top:-5px;height:2px;background:currentColor;}
.nav-toggle__text{line-height:1;}

.nav-close{
  display:inline-flex;align-items:center;
  padding:8px 14px;border:1px solid rgba(244,238,227,.5);
  color:var(--paper);font-family:var(--mono);font-size:12px;letter-spacing:.14em;
  transition:background .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease);
}
.nav-close:hover{background:var(--cinnabar);border-color:var(--cinnabar);color:var(--paper-white);}

.to-top{
  display:inline-flex;align-items:center;justify-content:center;
  padding:8px 12px;
  border:1px solid rgba(46,70,117,.5);
  color:var(--indigo);background:transparent;
  font-family:var(--mono);font-size:12px;letter-spacing:.12em;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.to-top:hover{background:var(--indigo);color:var(--paper);border-color:var(--indigo);}

.site-header.is-compact .site-nav__list{display:none;}
.site-header.is-compact .nav-toggle{display:inline-flex;}

.site-nav[data-open="true"]{
  position:fixed;inset:0;z-index:90;
  display:block;margin:0;
  padding:clamp(72px,13vh,132px) clamp(24px,8vw,140px) clamp(40px,8vh,80px);
  overflow-y:auto;
  background-color:var(--indigo-deep);
  background-image:
    repeating-linear-gradient(90deg,rgba(244,238,227,.055) 0 1px,transparent 1px 72px),
    radial-gradient(circle at 84% 10%,rgba(178,58,46,.3),transparent 56%);
  color:var(--paper);
  animation:nav-in .24s var(--ease) both;
}
@keyframes nav-in{
  from{opacity:0;transform:translateY(-8px);}
  to{opacity:1;transform:none;}
}
.site-nav[data-open="true"] .site-nav__head{
  display:flex;justify-content:space-between;align-items:center;gap:20px;
  padding-bottom:16px;margin-bottom:clamp(16px,4vh,38px);
  border-bottom:1px solid rgba(244,238,227,.2);
}
.site-nav[data-open="true"] .site-nav__list{
  display:flex;flex-direction:column;flex-wrap:nowrap;gap:0;
  max-width:820px;
}
.site-nav[data-open="true"] .site-nav__list li{border-bottom:1px solid rgba(244,238,227,.14);}
.site-nav[data-open="true"] .site-nav__list a{
  display:flex;align-items:baseline;gap:clamp(12px,2vw,28px);
  padding:clamp(12px,2.4vh,24px) 0;
  border-bottom:0;
  color:var(--paper);
  font-family:var(--serif);font-weight:900;
  font-size:clamp(26px,4.4vw,44px);line-height:1.15;letter-spacing:-.01em;
  transition:color .2s var(--ease),padding-left .24s var(--ease);
}
.site-nav[data-open="true"] .site-nav__num{
  min-width:2.6em;
  font-family:var(--mono);font-size:clamp(12px,1.1vw,14px);
  font-weight:400;letter-spacing:.12em;color:var(--ochre);
}
.site-nav[data-open="true"] .site-nav__list a:hover,
.site-nav[data-open="true"] .site-nav__list a[aria-current="page"]{
  color:var(--cinnabar-light);padding-left:.35em;
}
.site-nav[data-open="true"] .site-nav__list a[aria-current="page"]::after{display:none;}

body.is-nav-open{overflow:hidden;}

.site-footer{
  position:relative;margin-top:clamp(48px,8vw,120px);
  background-color:var(--paper);
  background-image:linear-gradient(180deg,rgba(228,218,199,.9),rgba(244,238,227,0) 240px);
  border-top:1px solid rgba(46,70,117,.3);
  color:var(--indigo);
}
.site-footer::before{
  content:"";display:block;height:8px;
  background-image:repeating-linear-gradient(90deg,rgba(22,35,63,.5) 0 1px,transparent 1px 20px);
  opacity:.55;
}
.footer-inner{
  width:100%;max-width:1180px;margin-inline:auto;
  padding:clamp(38px,5.5vw,68px) clamp(20px,5vw,64px) clamp(24px,3vw,36px);
}
.footer-grid{
  display:grid;gap:clamp(26px,4vw,52px);
  grid-template-columns:1.6fr repeat(3,minmax(0,1fr));
  align-items:start;
}
.footer-brand__mark{
  font-family:var(--serif);font-weight:900;
  font-size:clamp(28px,3.4vw,38px);line-height:1.1;letter-spacing:-.01em;
  color:var(--indigo);max-width:none;
}
.footer-brand__tagline{
  margin-top:10px;
  font-family:var(--serif);font-weight:300;
  font-size:15px;letter-spacing:.18em;color:var(--cinnabar);max-width:none;
}
.footer-brand__summary{
  margin-top:16px;max-width:30em;
  font-size:14px;line-height:1.9;color:var(--slate);
}
.footer-col__title{
  padding-bottom:10px;margin-bottom:14px;
  border-bottom:1px solid var(--ochre);
  font-family:var(--mono);font-size:12px;font-weight:500;
  letter-spacing:.18em;color:var(--indigo);
}
.footer-col__list li + li{margin-top:9px;}
.footer-col__list a{
  font-size:14px;color:var(--indigo);
  border-bottom:1px solid transparent;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.footer-col__list a:hover{color:var(--cinnabar);border-bottom-color:var(--cinnabar-light);}
.footer-contact{
  margin-top:clamp(26px,4vw,46px);padding-top:18px;
  border-top:1px solid rgba(46,70,117,.22);
  display:flex;flex-wrap:wrap;gap:6px 18px;
  font-family:var(--mono);font-size:12px;letter-spacing:.06em;color:var(--slate);
  max-width:none;
}
.footer-legal{
  margin-top:16px;
  display:flex;flex-wrap:wrap;gap:8px 26px;
  font-family:var(--mono);font-size:12px;letter-spacing:.06em;color:var(--slate);
}
.footer-legal__item{max-width:none;}

.has-js [data-reveal]{
  opacity:0;transform:translateY(8px);
  transition:opacity .24s var(--ease),transform .24s var(--ease);
}
.has-js [data-reveal].is-revealed{opacity:1;transform:none;}

[data-toc-link]{
  transition:color .2s var(--ease),border-color .2s var(--ease),padding-left .2s var(--ease);
}
[data-toc-link][aria-current="location"]{
  color:var(--cinnabar);
  border-left:2px solid var(--ochre);
  padding-left:10px;
}

@media (max-width:1080px){
  .footer-grid{grid-template-columns:1fr 1fr;}
  .site-nav__list{gap:12px;}
  .site-nav__label{letter-spacing:.02em;}
}

@media (max-width:960px){
  html{scroll-padding-top:104px;}
  .site-header{grid-template-columns:minmax(0,1fr);}
  .brand-rail{
    flex-direction:row;align-items:baseline;gap:12px;
    padding:10px clamp(16px,4vw,24px);
  }
  .brand-rail::after{display:none;}
  .brand-rail__tagline{font-size:11px;letter-spacing:.06em;}
  .brand-rail__index{display:none;}
  .brand-rail__num{display:none;}
  .header-bar{min-height:54px;padding:8px clamp(16px,4vw,24px);gap:10px;}
  .header-bar__stamp{display:none;}
  .site-nav__list{display:none;}
  .site-header.is-compact .site-nav__list{display:none;}
  .nav-toggle{display:inline-flex;margin-left:auto;}
  .to-top{padding:7px 10px;}
}

@media (max-width:720px){
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-brand__summary{max-width:none;}
  .index-table{font-size:14px;}
  .index-table th,.index-table td{padding:10px 10px;}
  .index-table td:first-child{width:52px;}
  .media-frame:hover{transform:none;}
}

@media (max-width:420px){
  .brand-rail__tagline{display:none;}
  .to-top{font-size:11px;letter-spacing:.08em;}
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .has-js [data-reveal]{opacity:1;transform:none;}
  .media-frame:hover{transform:none;}
  .site-nav[data-open="true"]{animation:none;}
}