:root{
  --green:#2E7D32;
  --blue:#0D47A1;
  --gold:#C9A227;
  --paper:#F8F5F0;
  --forest:#1B3E2B;
  --mist:#E3F2E1;
  --sky:#E1F0FA;
  --ink:#1F1F1F;
  --gray:#5A5A5A;
  --cream:#F3E5AB;
  --font-head:'Source Han Serif SC','Noto Serif SC','Songti SC',serif;
  --font-body:'Source Han Sans SC','Noto Sans SC','PingFang SC','Microsoft YaHei',sans-serif;
  --font-mono:'Roboto Mono','JetBrains Mono','SFMono-Regular',Consolas,monospace;
  --container:1240px;
  --radius:2px;
}

*,
*::before,
*::after{
  box-sizing:border-box;
}

html{
  -webkit-text-size-adjust:100%;
  text-size-adjust:100%;
  scroll-behavior:smooth;
}

body{
  margin:0;
  min-height:100vh;
  display:flex;
  flex-direction:column;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:1rem;
  line-height:1.7;
}

h1,h2,h3,h4,p,ul,ol,dl,address,figure{
  margin:0;
}

ul[class],
ol[class]{
  list-style:none;
}

a{
  color:var(--blue);
  text-underline-offset:.2em;
}

img{
  max-width:100%;
  height:auto;
  display:block;
}

button{
  font:inherit;
}

::selection{
  background:var(--green);
  color:#fff;
}

:focus-visible{
  outline:3px solid var(--gold);
  outline-offset:2px;
  border-radius:1px;
}

#main-content{
  display:block;
  flex:1 0 auto;
}

.skip-link{
  position:fixed;
  top:10px;
  left:10px;
  z-index:1000;
  transform:translateY(-200%);
  background:var(--forest);
  color:#fff;
  padding:.65em 1.1em;
  font-weight:600;
  text-decoration:none;
  border-radius:2px;
  transition:transform .2s ease;
}

.skip-link:focus{
  transform:translateY(0);
}

.site-header{
  position:sticky;
  top:0;
  z-index:100;
  background:rgba(248,245,240,.97);
  border-bottom:2px solid var(--green);
  transition:box-shadow .25s ease;
}

.site-header::before{
  content:"";
  position:absolute;
  top:0;
  left:0;
  bottom:0;
  width:4px;
  background:repeating-linear-gradient(180deg,var(--green) 0 6px,transparent 6px 12px);
  pointer-events:none;
}

.header-inner{
  max-width:var(--container);
  margin:0 auto;
  padding:18px clamp(16px,3vw,32px);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:2rem;
  transition:padding .28s ease;
}

.site-brand{
  display:inline-flex;
  align-items:baseline;
  gap:.8rem;
  text-decoration:none;
  color:var(--ink);
}

.brand-index{
  font-family:var(--font-mono);
  font-size:.7rem;
  letter-spacing:.08em;
  padding:.25em .5em;
  background:var(--mist);
  color:var(--green);
  border:1px solid rgba(46,125,50,.25);
}

.brand-name{
  font-family:var(--font-head);
  font-size:1.25rem;
  font-weight:700;
  line-height:1.2;
  transition:font-size .28s ease;
}

.site-nav{
  display:block;
}

.nav-list{
  display:flex;
  align-items:center;
  gap:2px;
}

.nav-item{
  list-style:none;
}

.nav-link{
  position:relative;
  display:inline-flex;
  align-items:baseline;
  gap:.4em;
  padding:.45em .7em;
  color:var(--ink);
  text-decoration:none;
  font-weight:600;
  font-size:.94rem;
  line-height:1.4;
}

.nav-index{
  font-family:var(--font-mono);
  color:var(--blue);
  font-size:.72em;
  letter-spacing:.04em;
}

.nav-text{
  white-space:nowrap;
}

.nav-link:hover{
  background:var(--mist);
  color:var(--green);
}

.nav-link[aria-current="page"]{
  color:var(--green);
}

.nav-link[aria-current="page"]::after{
  content:"";
  position:absolute;
  left:.7em;
  right:.7em;
  bottom:.15em;
  height:3px;
  background:var(--gold);
}

.nav-toggle{
  display:none;
  align-items:center;
  gap:.6rem;
  background:transparent;
  border:1px solid rgba(46,125,50,.3);
  border-radius:var(--radius);
  padding:.35rem .6rem;
  color:var(--ink);
  cursor:pointer;
}

.nav-toggle-label{
  font-size:.85rem;
  font-weight:600;
}

.nav-toggle-icon{
  display:flex;
  flex-direction:column;
  gap:4px;
  width:18px;
}

.nav-toggle-line{
  display:block;
  height:2px;
  background:currentColor;
  transition:transform .2s ease,opacity .2s ease;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(1){
  transform:translateY(6px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(2){
  opacity:0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(3){
  transform:translateY(-6px) rotate(-45deg);
}

.scroll-progress{
  position:absolute;
  left:0;
  bottom:-2px;
  height:3px;
  width:0;
  background:var(--gold);
  z-index:101;
  pointer-events:none;
}

.site-header.is-scrolled{
  box-shadow:0 6px 18px rgba(27,62,43,.08);
}

.site-header.is-scrolled .header-inner{
  padding-top:10px;
  padding-bottom:10px;
}

.site-header.is-scrolled .brand-name{
  font-size:1.05rem;
}

.container{
  max-width:calc(var(--container) + 2rem);
  margin-inline:auto;
  padding-inline:clamp(1rem,3vw,2rem);
}

.page-shell{
  max-width:var(--container);
  margin-inline:auto;
  padding:clamp(1.5rem,4vw,3rem) clamp(1rem,3vw,2rem) clamp(3rem,7vw,5rem);
}

.layout-split{
  display:grid;
  gap:clamp(1.5rem,3vw,2.5rem);
  grid-template-columns:minmax(0,1fr);
}

@media(min-width:860px){
  .layout-split{
    grid-template-columns:minmax(0,3fr) minmax(0,9fr);
  }
}

.page-heading{
  margin-bottom:clamp(2rem,5vw,3.5rem);
}

.page-kicker{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:.76rem;
  letter-spacing:.1em;
  text-transform:uppercase;
  padding:.25em .6em;
  border:1px solid rgba(201,162,39,.45);
  background:var(--cream);
  color:var(--ink);
  margin-bottom:1rem;
}

.headline{
  font-family:var(--font-head);
  font-weight:700;
  font-size:clamp(2.3rem,6vw,3.75rem);
  line-height:1.08;
  letter-spacing:-.01em;
}

.lede{
  margin-top:1.2rem;
  max-width:68ch;
  color:var(--gray);
  font-size:1.05rem;
}

.section-title{
  font-family:var(--font-head);
  font-size:clamp(1.4rem,2.5vw,2rem);
  line-height:1.3;
  margin-top:2rem;
  margin-bottom:1rem;
}

.prose p + p{
  margin-top:1em;
}

.prose ul:not([class]),
.prose ol:not([class]){
  padding-left:1.4em;
}

.prose ul:not([class]){
  list-style:disc;
}

.prose ol:not([class]){
  list-style:decimal;
}

.prose li + li{
  margin-top:.4em;
}

.breadcrumbs{
  display:flex;
  flex-wrap:wrap;
  gap:.6em;
  list-style:none;
  font-family:var(--font-mono);
  font-size:.8rem;
  letter-spacing:.05em;
}

.breadcrumbs li + li::before{
  content:"/";
  margin-right:.6em;
  opacity:.55;
}

.breadcrumbs a{
  color:var(--blue);
  text-decoration:none;
}

.btn{
  display:inline-flex;
  align-items:center;
  gap:.5em;
  padding:.65em 1.2em;
  border:1px solid var(--green);
  border-radius:var(--radius);
  background:var(--green);
  color:var(--paper);
  font-size:.95rem;
  font-weight:600;
  text-decoration:none;
  line-height:1.3;
  cursor:pointer;
  transition:background .2s ease,color .2s ease,border-color .2s ease;
}

.btn:hover,
.btn:focus-visible{
  background:var(--forest);
  border-color:var(--forest);
}

.btn-outline{
  background:transparent;
  color:var(--green);
}

.btn-outline:hover{
  background:var(--green);
  color:#fff;
}

.btn-gold{
  background:var(--gold);
  border-color:var(--gold);
  color:var(--ink);
}

.btn-gold:hover{
  background:var(--ink);
  border-color:var(--ink);
  color:var(--cream);
}

.tag{
  display:inline-flex;
  align-items:center;
  gap:.35em;
  font-family:var(--font-mono);
  font-size:.75rem;
  letter-spacing:.04em;
  padding:.25em .65em;
  border:1px solid rgba(201,162,39,.35);
  background:var(--cream);
  color:var(--ink);
  border-radius:var(--radius);
}

.tag-green{
  background:var(--mist);
  border-color:rgba(46,125,50,.28);
  color:var(--green);
}

.tag-blue{
  background:var(--sky);
  border-color:rgba(13,71,161,.2);
  color:var(--blue);
}

.index-label{
  display:block;
  font-family:var(--font-mono);
  font-size:.75rem;
  letter-spacing:.1em;
  text-transform:uppercase;
  color:var(--gray);
}

.version-stamp{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:.8rem;
  letter-spacing:.02em;
  border:2px solid var(--gold);
  color:var(--gold);
  padding:.35em .6em;
}

.media-frame{
  position:relative;
  display:block;
  overflow:hidden;
  aspect-ratio:16 / 9;
  background:var(--mist);
  border:1px solid rgba(46,125,50,.2);
}

.media-frame img{
  width:100%;
  height:100%;
  object-fit:cover;
}

.media-frame--wide{
  aspect-ratio:21 / 9;
}

.media-frame--portrait{
  aspect-ratio:4 / 5;
}

.media-caption{
  font-family:var(--font-mono);
  font-size:.75rem;
  color:var(--gray);
  margin-top:.5rem;
}

html.js [data-reveal]{
  opacity:0;
  transform:translateY(14px);
  transition:opacity .55s ease,transform .55s ease;
}

html.js [data-reveal="shown"]{
  opacity:1;
  transform:none;
}

.site-footer{
  position:relative;
  background:var(--forest);
  color:rgba(248,245,240,.85);
  margin-top:auto;
  overflow:hidden;
}

.site-footer::before{
  content:"";
  display:block;
  height:4px;
  background:repeating-linear-gradient(
    90deg,
    var(--gold) 0 32px,
    transparent 32px 48px,
    var(--green) 48px 80px,
    var(--sky) 80px 96px
  );
  opacity:.85;
  pointer-events:none;
}

.site-footer a{
  color:var(--cream);
  text-decoration:none;
}

.site-footer a:hover{
  color:#fff;
  text-decoration:underline;
}

.footer-inner{
  max-width:var(--container);
  margin:0 auto;
  padding:clamp(2.5rem,5vw,4.5rem) clamp(1rem,3vw,2rem) 1.5rem;
}

.footer-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:clamp(1.5rem,3vw,2.5rem);
}

.footer-brand-block,
.footer-nav-block,
.footer-doc-block,
.footer-contact-block{
  min-width:0;
}

.footer-heading{
  font-family:var(--font-mono);
  font-size:.78rem;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--gold);
  border-bottom:1px solid rgba(201,162,39,.35);
  padding-bottom:.5rem;
  margin-bottom:.9rem;
}

.footer-brand-name{
  font-family:var(--font-head);
  font-size:1.6rem;
  color:#fff;
  line-height:1.2;
}

.footer-brand-label{
  font-family:var(--font-mono);
  color:var(--gold);
  font-size:.78rem;
  letter-spacing:.1em;
  margin-bottom:.3rem;
}

.footer-tagline{
  margin-top:.4rem;
  font-size:.9rem;
  color:rgba(248,245,240,.7);
}

.footer-links{
  display:grid;
  gap:.5rem;
}

.footer-address{
  display:grid;
  gap:.4rem;
  font-style:normal;
  font-size:.95rem;
  line-height:1.6;
}

.footer-contact-note{
  font-size:.78rem;
  opacity:.7;
  margin-top:.8rem;
}

.footer-bottom{
  border-top:1px solid rgba(248,245,240,.16);
  margin-top:clamp(2rem,4vw,3.5rem);
  padding-top:1.25rem;
  display:flex;
  flex-wrap:wrap;
  gap:.6rem 2.5rem;
  justify-content:space-between;
  align-items:center;
  color:rgba(248,245,240,.65);
  font-size:.8rem;
}

.footer-source{
  font-size:.78rem;
  opacity:.75;
}

@media(min-width:720px){
  .footer-grid{
    grid-template-columns:1.4fr 1fr 1fr;
  }
}

@media(min-width:1080px){
  .footer-grid{
    grid-template-columns:1.6fr 1fr 1fr 1.6fr;
  }
}

@media(max-width:900px){
  .header-inner{
    flex-wrap:wrap;
    padding-top:14px;
    padding-bottom:14px;
  }

  .site-brand{
    order:1;
  }

  .nav-toggle{
    order:2;
    display:inline-flex;
    margin-left:auto;
  }

  .site-nav{
    order:3;
    width:100%;
    max-height:0;
    overflow:hidden;
    transition:max-height .35s ease;
  }

  .site-nav[data-open]{
    max-height:calc(100vh - 90px);
    max-height:calc(100dvh - 90px);
    overflow-y:auto;
  }

  .nav-list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding-top:.6rem;
    border-top:1px solid rgba(46,125,50,.2);
  }

  .nav-item + .nav-item{
    border-top:1px solid rgba(46,125,50,.12);
  }

  .nav-link{
    width:100%;
    padding:.7rem .1rem;
    justify-content:space-between;
  }

  .nav-link[aria-current="page"]::after{
    left:0;
    right:auto;
    bottom:.35rem;
    width:1.4rem;
  }
}

@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;
  }

  html.js [data-reveal],
  html.js [data-reveal="shown"]{
    opacity:1;
    transform:none;
  }
}