*,*::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,dl,dd,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
a{color:inherit;text-decoration:none}
table{border-collapse:collapse;width:100%}
:where(h1,h2,h3,h4){line-height:1.12}

:root{
  --sea:#3E6E7E;
  --sea-deep:#2A5461;
  --deep:#0E3B3E;
  --indigo:#2C2A5E;
  --wine:#6B2434;
  --pearl:#F6F4EE;
  --mist:#E4EDF0;
  --line:#C9D3D6;
  --coral:#F26B4E;
  --ink:#14232B;
  --white:#FFFFFF;
  --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;
  --shell:1200px;
  --narrow:720px;
  --gutter:clamp(18px,4vw,56px);
  --ease:cubic-bezier(.22,.61,.36,1);
  --shadow-hard:8px 8px 0 rgba(20,35,43,.9);
  --shadow-soft:8px 8px 0 rgba(20,35,43,.16);
}

body{
  min-height:100vh;
  background-color:var(--pearl);
  background-image:
    linear-gradient(to right,rgba(62,110,126,.075) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(62,110,126,.075) 1px,transparent 1px);
  background-size:72px 72px;
  background-attachment:fixed;
  color:var(--ink);
  font-family:var(--font-sans);
  font-size:clamp(16px,.5vw + 14px,18px);
  font-weight:400;
  line-height:1.75;
  letter-spacing:.01em;
}

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

/* ---------- skip link ---------- */
.skip-link{
  position:fixed;
  top:-120px;
  left:16px;
  z-index:200;
  padding:10px 20px;
  border:2px solid var(--ink);
  border-radius:999px;
  background:var(--deep);
  color:var(--pearl);
  font-size:14px;
  font-weight:700;
  letter-spacing:.06em;
  transition:top .22s var(--ease);
}
.skip-link:focus{top:14px}

/* ---------- header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  padding:clamp(10px,1.6vw,18px) var(--gutter);
  pointer-events:none;
  transition:padding .28s var(--ease);
}
.site-header.is-condensed{padding-block:6px}

.header-rail{
  position:relative;
  display:flex;
  align-items:center;
  gap:clamp(8px,1.2vw,16px);
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding:9px 9px 9px clamp(15px,2vw,26px);
  background:rgba(255,255,255,.9);
  border:2px solid var(--ink);
  border-radius:999px;
  box-shadow:4px 4px 0 rgba(20,35,43,.16);
  -webkit-backdrop-filter:blur(14px) saturate(1.15);
  backdrop-filter:blur(14px) saturate(1.15);
  pointer-events:auto;
  transition:box-shadow .28s var(--ease),background-color .28s var(--ease);
}
.site-header.is-condensed .header-rail{
  background:rgba(255,255,255,.97);
  box-shadow:2px 2px 0 rgba(20,35,43,.24);
}

/* brand */
.brand{
  display:inline-flex;
  align-items:baseline;
  gap:.48em;
  flex:0 0 auto;
  color:var(--ink);
  line-height:1;
}
.brand-mark{
  font-size:clamp(17px,1.4vw,20px);
  font-weight:800;
  letter-spacing:.16em;
}
.brand-slash{
  color:var(--coral);
  font-size:13px;
  font-weight:700;
}
.brand-latin{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--sea);
}
.brand-tagline{
  padding-left:.75em;
  border-left:1px solid var(--line);
  font-size:11px;
  letter-spacing:.28em;
  color:var(--sea);
  white-space:nowrap;
}

/* nav toggle */
.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  margin-left:auto;
  padding:9px 16px 9px 13px;
  border:2px solid var(--ink);
  border-radius:999px;
  background:var(--pearl);
  color:var(--ink);
  font-size:14px;
  font-weight:700;
  letter-spacing:.08em;
  transition:background-color .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.nav-toggle:hover{background:var(--mist)}
.nav-toggle[aria-expanded="true"]{
  background:var(--deep);
  border-color:var(--deep);
  color:var(--pearl);
}
.nav-toggle-icon{display:grid;gap:4px;width:16px}
.nav-toggle-icon span{
  display:block;
  height:2px;
  background:currentColor;
  transition:transform .25s var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-icon span:first-child{transform:translateY(3px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-icon span:last-child{transform:translateY(-3px) rotate(-45deg)}

/* nav */
.site-nav{
  display:flex;
  align-items:center;
  margin-left:auto;
}
.nav-list{display:flex;align-items:center;gap:2px}
.nav-list a{
  display:inline-flex;
  align-items:center;
  height:36px;
  padding:0 clamp(8px,1vw,13px);
  border-radius:999px;
  font-size:15px;
  font-weight:500;
  letter-spacing:.02em;
  white-space:nowrap;
  transition:background-color .2s var(--ease),color .2s var(--ease);
}
.nav-list a:hover{background:var(--mist);color:var(--deep)}
.nav-list a[aria-current="page"]{
  background:var(--deep);
  color:var(--pearl);
  font-weight:700;
}
.nav-meta{display:none}
.nav-meta__label{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.24em;
  color:var(--sea);
}
.nav-meta__value{
  font-size:14px;
  font-weight:700;
  color:var(--ink);
}
.nav-meta__cta{justify-self:start}

.header-actions{
  display:flex;
  align-items:center;
  gap:14px;
  flex:0 0 auto;
}
.header-status{
  padding-left:14px;
  border-left:1px solid var(--line);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--sea);
  white-space:nowrap;
}

/* ---------- buttons ---------- */
.btn{
  --btn-bg:var(--coral);
  --btn-fg:var(--ink);
  --btn-bd:var(--ink);
  --btn-sh:rgba(20,35,43,.85);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.45em;
  padding:.66em 1.15em;
  border:2px solid var(--btn-bd);
  border-radius:999px;
  background:var(--btn-bg);
  color:var(--btn-fg);
  font-size:15px;
  font-weight:700;
  line-height:1.2;
  letter-spacing:.04em;
  box-shadow:4px 4px 0 var(--btn-sh);
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),background-color .18s var(--ease),color .18s var(--ease);
}
.btn:hover{transform:translate(-2px,-2px);box-shadow:6px 6px 0 var(--btn-sh)}
.btn:active{transform:translate(2px,2px);box-shadow:1px 1px 0 var(--btn-sh)}
.btn--go{--btn-bg:var(--coral);--btn-fg:var(--ink);--btn-bd:var(--ink)}
.btn--line{--btn-bg:transparent;--btn-fg:var(--ink);--btn-bd:var(--ink);--btn-sh:rgba(20,35,43,.35)}
.btn--deep{--btn-bg:var(--deep);--btn-fg:var(--pearl);--btn-bd:var(--deep);--btn-sh:rgba(20,35,43,.28)}
.btn--sm{padding:.5em .95em;font-size:13px;box-shadow:3px 3px 0 var(--btn-sh)}
.btn--sm:hover{box-shadow:4px 4px 0 var(--btn-sh)}

/* ---------- layout containers ---------- */
.wrap{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.wrap--narrow{max-width:calc(var(--narrow) + var(--gutter) * 2)}

.section{
  position:relative;
  padding-block:clamp(48px,8vw,110px);
}
.section--deep{background:var(--deep);color:var(--pearl)}
.section--indigo{background:var(--indigo);color:var(--pearl)}
.section--wine{background:var(--wine);color:var(--pearl)}
.section--mist{background:var(--mist)}

.grid{display:grid;gap:clamp(14px,2vw,32px)}

/* ---------- typography ---------- */
.display{
  font-size:clamp(36px,7vw,92px);
  font-weight:800;
  line-height:1.08;
  letter-spacing:.08em;
  text-align:left;
  text-wrap:balance;
}
.section-title{
  font-size:clamp(24px,3.2vw,40px);
  font-weight:800;
  line-height:1.22;
  letter-spacing:.05em;
  text-align:left;
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:500;
  letter-spacing:.28em;
  color:var(--sea);
  text-transform:uppercase;
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--coral)}
.lede{
  max-width:42ch;
  font-size:clamp(17px,1.15vw,20px);
  line-height:1.8;
  color:rgba(20,35,43,.78);
}
.prose{max-width:var(--narrow);font-size:clamp(16px,.35vw + 15px,18px);line-height:1.85}
.prose p + p{margin-top:1.05em}
.prose h2,.prose h3{margin-top:2em;margin-bottom:.6em}
.mono{font-family:var(--font-mono);font-size:.92em;letter-spacing:.02em}
.rule{height:2px;border:0;background:var(--ink);opacity:.14}

.section--deep .eyebrow,.section--indigo .eyebrow,.section--wine .eyebrow{color:rgba(246,244,238,.72)}
.section--deep .lede,.section--indigo .lede,.section--wine .lede{color:rgba(246,244,238,.78)}
.section--deep .rule,.section--indigo .rule,.section--wine .rule{background:var(--pearl);opacity:.24}

/* ---------- blueprint decorations ---------- */
.coord{
  position:absolute;
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.26em;
  color:var(--sea);
  opacity:.7;
  pointer-events:none;
  white-space:nowrap;
}
.coord--tl{top:14px;left:16px}
.coord--tr{top:14px;right:16px}
.coord--bl{bottom:14px;left:16px}
.coord--br{bottom:14px;right:16px}
.section--deep .coord,.section--indigo .coord,.section--wine .coord{color:rgba(246,244,238,.55)}

.note-vertical{
  writing-mode:vertical-rl;
  font-size:12px;
  letter-spacing:.3em;
  color:var(--sea);
  opacity:.85;
  pointer-events:none;
}
.section--deep .note-vertical,.section--indigo .note-vertical,.section--wine .note-vertical{
  color:rgba(246,244,238,.6);
}

/* ---------- breadcrumbs ---------- */
.crumbs{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.1em;
  color:var(--sea);
}
.crumbs ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.crumbs li{display:flex;align-items:center;gap:8px}
.crumbs li + li::before{content:"/";color:var(--line)}
.crumbs a{color:var(--sea);border-bottom:1px solid transparent;transition:border-color .2s var(--ease)}
.crumbs a:hover{border-color:var(--coral)}
.crumbs [aria-current="page"]{color:var(--ink)}

/* ---------- figure / image containers ---------- */
.figure{display:grid;gap:10px}
.figure-media{
  position:relative;
  overflow:hidden;
  aspect-ratio:16/10;
  border:2px solid var(--ink);
  background-color:var(--mist);
  background-image:repeating-linear-gradient(135deg,transparent 0 24px,rgba(62,110,126,.12) 24px 25px);
  box-shadow:var(--shadow-soft);
}
.figure-media > img{
  width:100%;
  height:100%;
  object-fit:cover;
}
.figure-caption{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  color:rgba(20,35,43,.6);
}
.figure--wide .figure-media{aspect-ratio:21/9}
.figure--tall .figure-media{aspect-ratio:3/4}

/* ---------- injected utilities ---------- */
.scroll-meter{
  position:fixed;
  top:0;
  left:0;
  right:0;
  height:3px;
  z-index:120;
  pointer-events:none;
  background:rgba(62,110,126,.12);
}
.scroll-meter__bar{
  height:100%;
  width:0;
  background:var(--coral);
  transition:width .1s linear;
}

.to-top{
  position:fixed;
  right:clamp(14px,2.4vw,30px);
  bottom:clamp(14px,2.4vw,30px);
  z-index:90;
  width:50px;
  height:50px;
  display:grid;
  place-items:center;
  border:2px solid var(--ink);
  border-radius:50%;
  background:var(--white);
  color:var(--ink);
  box-shadow:4px 4px 0 rgba(20,35,43,.85);
  opacity:0;
  visibility:hidden;
  transform:translateY(12px);
  transition:opacity .25s var(--ease),transform .25s var(--ease),visibility .25s,background-color .2s var(--ease);
}
.to-top.is-visible{opacity:1;visibility:visible;transform:none}
.to-top:hover{background:var(--coral)}
.to-top__arrow{font-size:18px;line-height:1;font-weight:700}

[data-reveal]{
  opacity:0;
  transform:translateY(14px);
  transition:opacity .6s var(--ease),transform .6s var(--ease);
}
[data-reveal].is-in{opacity:1;transform:none}

/* ---------- footer ---------- */
.site-footer{
  position:relative;
  overflow:hidden;
  margin-top:clamp(56px,9vw,140px);
  padding:clamp(44px,6vw,88px) 0 clamp(24px,3vw,36px);
  border-top:3px solid var(--coral);
  background-color:var(--deep);
  background-image:
    linear-gradient(to right,rgba(228,237,240,.075) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(228,237,240,.075) 1px,transparent 1px);
  background-size:80px 80px;
  color:rgba(246,244,238,.86);
}
.footer-mark{
  position:absolute;
  top:clamp(16px,3vw,36px);
  right:clamp(16px,4vw,48px);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.3em;
  color:rgba(246,244,238,.34);
  pointer-events:none;
}
.footer-lead{
  display:grid;
  grid-template-columns:minmax(220px,1.15fr) minmax(0,2fr) minmax(210px,1.1fr);
  gap:clamp(28px,4.5vw,72px);
  align-items:start;
}
.brand--inverse{color:var(--pearl)}
.brand--inverse .brand-latin{color:rgba(246,244,238,.62)}
.footer-summary{
  margin-top:18px;
  max-width:34ch;
  font-size:15px;
  line-height:1.85;
  color:rgba(246,244,238,.72);
}
.footer-chip{
  display:inline-flex;
  margin-top:20px;
  padding:5px 14px;
  border:1px solid rgba(246,244,238,.3);
  border-radius:999px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.24em;
  color:rgba(246,244,238,.78);
}
.footer-nav{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(16px,2.4vw,36px);
}
.footer-col__title{
  margin-bottom:16px;
  font-size:11px;
  font-weight:700;
  letter-spacing:.32em;
  color:var(--coral);
}
.footer-nav a{
  display:inline-block;
  padding:5px 0;
  border-bottom:1px solid transparent;
  font-size:15px;
  color:rgba(246,244,238,.8);
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.footer-nav a:hover{color:var(--white);border-bottom-color:var(--coral)}
.footer-contact__list{display:grid;gap:14px}
.footer-contact__k{
  display:block;
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.22em;
  color:rgba(246,244,238,.45);
}
.footer-contact__v{
  display:block;
  font-size:14px;
  color:rgba(246,244,238,.88);
  word-break:break-word;
}
.footer-note{
  margin-top:18px;
  padding-left:12px;
  border-left:2px solid rgba(242,107,78,.6);
  font-size:12.5px;
  line-height:1.8;
  color:rgba(246,244,238,.52);
}
.footer-base{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px 26px;
  margin-top:clamp(34px,5vw,64px);
  padding-top:20px;
  border-top:1px solid rgba(246,244,238,.16);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:rgba(246,244,238,.55);
}
.footer-legal{display:flex;flex-wrap:wrap;gap:4px 20px}
.footer-legal a{transition:color .2s var(--ease)}
.footer-legal a:hover{color:var(--coral)}
.footer-copy{max-width:100%}

/* ---------- responsiveness ---------- */
@media (max-width:1180px){
  .brand-tagline{display:none}
  .header-status{display:none}
}

@media (max-width:1080px){
  .footer-lead{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}
  .footer-identity{grid-column:1/-1}
}

@media (max-width:979px){
  .nav-toggle{display:inline-flex}
  .header-actions{display:none}
  .site-nav{
    position:absolute;
    top:calc(100% + 10px);
    left:0;
    right:0;
    display:flex;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    margin-left:0;
    padding:12px;
    border:2px solid var(--ink);
    border-radius:26px;
    background:var(--white);
    box-shadow:var(--shadow-hard);
    max-height:min(72vh,560px);
    overflow:auto;
    opacity:0;
    visibility:hidden;
    transform:translateY(-10px);
    transition:opacity .22s var(--ease),transform .22s var(--ease),visibility .22s;
  }
  .site-nav[data-open]{
    opacity:1;
    visibility:visible;
    transform:none;
  }
  .nav-list{flex-direction:column;align-items:stretch;gap:2px}
  .nav-list a{
    height:auto;
    padding:13px 16px;
    border-radius:14px;
    font-size:16px;
  }
  .nav-meta{
    display:grid;
    gap:10px;
    margin-top:12px;
    padding-top:14px;
    border-top:1px solid var(--line);
  }
}

@media (max-width:720px){
  .footer-lead{grid-template-columns:minmax(0,1fr)}
  .footer-nav{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-mark{display:none}
  .footer-base{flex-direction:column;align-items:flex-start}
  .figure--wide .figure-media{aspect-ratio:16/10}
}

@media (max-width:520px){
  .header-rail{padding:8px 8px 8px 14px;border-radius:26px}
  .nav-toggle{padding:8px 13px}
  .brand-latin{display:none}
  .display{letter-spacing:.06em}
  .footer-nav{grid-template-columns:minmax(0,1fr)}
}

@media (max-width:400px){
  .nav-toggle-text{display:none}
  .nav-toggle{padding:9px 11px}
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  html{scroll-behavior:auto}
  [data-reveal]{opacity:1 !important;transform:none !important;transition:none !important}
  .btn:hover,.btn:active{transform:none}
  .to-top{transform:none}
}