@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;700&family=Space+Grotesk:wght@400;500;600;700&display=swap');

:root{
  --paper:#ffffff;
  --wash:#f5f5f5;
  --ink:#1f1f1f;
  --soft:#5c5c5c;
  --r:28px;
  --edge:rgba(31,31,31,.55);
}

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

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

body{
  margin:0;
  background:var(--wash);
  color:var(--ink);
  font-family:"DM Sans","Space Grotesk",system-ui,-apple-system,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  font-size:17px;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}

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

a{color:inherit}

:focus-visible{outline:2px solid var(--ink);outline-offset:3px;border-radius:6px}

.shell{
  width:100%;
  max-width:1240px;
  margin:0 auto;
  padding:0 clamp(14px,3vw,34px);
}

/* ---------- masthead ---------- */

.masthead{padding-top:clamp(16px,3vw,32px)}

.brandbar{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  flex-wrap:wrap;
}

.brandlink{
  display:inline-flex;
  align-items:center;
  gap:12px;
  min-height:48px;
  text-decoration:none;
}

.mark{
  width:42px;
  height:42px;
  border-radius:14px;
  border:1px solid var(--ink);
  object-fit:cover;
  background:var(--paper);
}

.brandname{
  font-family:"Space Grotesk",sans-serif;
  font-weight:700;
  font-size:clamp(1.15rem,2.2vw,1.5rem);
  letter-spacing:-.02em;
}

.cta{
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:0 22px;
  border:1px solid var(--ink);
  border-radius:999px;
  background:var(--ink);
  color:#fff;
  font-size:1rem;
  font-weight:600;
  text-decoration:none;
  transition:transform .2s ease,background .2s ease;
}

.cta:hover{transform:translateY(-2px);background:#000}

.navline{
  margin-top:14px;
  padding:5px 0;
  border-top:1px solid var(--edge);
  border-bottom:1px solid var(--edge);
}

.navline p{
  display:flex;
  flex-wrap:wrap;
  gap:2px 4px;
  margin:0;
}

.navline a{
  display:inline-flex;
  align-items:center;
  min-height:42px;
  padding:0 12px;
  border-radius:999px;
  color:var(--soft);
  font-size:1rem;
  text-decoration:none;
  transition:color .18s ease,background .18s ease;
}

.navline a:hover,
.navline a:focus-visible{color:var(--ink);background:var(--paper)}

.navline a:first-child{color:var(--ink);font-weight:600}

/* ---------- hero ---------- */

.hero{
  position:relative;
  overflow:hidden;
  display:flex;
  flex-direction:column;
  justify-content:flex-end;
  align-items:flex-end;
  text-align:right;
  min-height:66vh;
  padding:clamp(48px,9vw,110px) 0 clamp(26px,4vw,44px);
}

.hero-sigil{
  position:absolute;
  top:clamp(4px,2vw,24px);
  right:-.06em;
  font-family:"Space Grotesk",sans-serif;
  font-weight:700;
  font-size:clamp(3.4rem,15vw,12rem);
  line-height:.82;
  letter-spacing:-.05em;
  color:rgba(31,31,31,.07);
  white-space:nowrap;
  pointer-events:none;
  user-select:none;
}

.hero h1{
  position:relative;
  margin:0;
  max-width:19ch;
  font-family:"Space Grotesk","PingFang SC",sans-serif;
  font-size:clamp(2rem,5.6vw,4.1rem);
  font-weight:700;
  line-height:1.08;
  letter-spacing:-.03em;
}

/* ---------- stage / rail ---------- */

main{padding-bottom:clamp(30px,5vw,60px)}

.stage{
  display:grid;
  grid-template-columns:236px minmax(0,1fr);
  gap:clamp(16px,2.4vw,28px);
  align-items:start;
}

.rail{
  position:sticky;
  top:20px;
  padding:16px 14px 18px;
  background:var(--paper);
  border:1px solid var(--ink);
  border-radius:var(--r);
}

.railtag{
  margin:0 0 8px;
  padding-left:6px;
  font-family:"Space Grotesk",sans-serif;
  font-size:.88rem;
  letter-spacing:.2em;
  color:var(--soft);
}

.raillist{
  margin:0;
  padding:0;
  list-style:none;
  counter-reset:rail;
}

.raillist li{counter-increment:rail}

.raillist a{
  display:flex;
  gap:10px;
  align-items:baseline;
  min-height:40px;
  padding:8px 6px;
  border-radius:14px;
  font-size:.95rem;
  line-height:1.4;
  text-decoration:none;
  transition:background .18s ease;
}

.raillist a::before{
  content:counter(rail,decimal-leading-zero);
  font-family:"Space Grotesk",sans-serif;
  font-size:.72rem;
  color:var(--soft);
  letter-spacing:.06em;
}

.raillist a:hover{background:var(--wash)}

/* ---------- bento panels ---------- */

.panels{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:16px;
  align-items:start;
}

.panels-lead{
  grid-column:1/-1;
  padding:4px 2px 10px;
}

.panels-lead h2{
  margin:0 0 6px;
  font-family:"Space Grotesk","PingFang SC",sans-serif;
  font-size:clamp(1.5rem,3.2vw,2.2rem);
  letter-spacing:-.025em;
  line-height:1.15;
}

.subtitle{
  margin:0;
  max-width:52ch;
  color:var(--soft);
  font-size:1rem;
}

.panels > article{
  grid-column:span 2;
  padding:clamp(20px,2.5vw,30px);
  background:var(--paper);
  border:1px solid var(--ink);
  border-radius:var(--r);
  scroll-margin-top:26px;
  transition:transform .24s cubic-bezier(.2,.7,.3,1);
}

.panels > article:nth-child(3n){
  grid-column:1/-1;
}

.panels > article:hover{transform:scale(1.012)}

.panels h2{
  margin:0 0 .5em;
  font-family:"Space Grotesk","PingFang SC",sans-serif;
  font-size:clamp(1.3rem,2.4vw,1.75rem);
  letter-spacing:-.02em;
  line-height:1.25;
}

.panels h3{
  margin:1.2em 0 .45em;
  font-size:1.1rem;
  line-height:1.4;
}

.panels > article > h2:first-child,
.panels > article > h3:first-child{margin-top:0}

.panels p{margin:0 0 1em;line-height:1.8}

.panels p:last-child{margin-bottom:0}

.panels ul,
.panels ol{margin:0 0 1em;padding-left:1.25em;line-height:1.8}

.panels li{margin:.25em 0}

.panels a{
  text-underline-offset:3px;
  text-decoration-thickness:1px;
}

.panels blockquote{
  margin:0 0 1em;
  padding:12px 18px;
  background:var(--wash);
  border-left:3px solid var(--ink);
  border-radius:0 16px 16px 0;
}

.panels figure{
  margin:0 0 1em;
  padding:14px;
  background:var(--wash);
  border:1px solid var(--edge);
  border-radius:18px;
}

.panels figcaption{
  margin-top:8px;
  font-size:.92rem;
  color:var(--soft);
}

.panels img{border-radius:16px}

.panels table{
  width:100%;
  border-collapse:collapse;
  font-size:.98rem;
}

.panels th,
.panels td{
  border-bottom:1px solid var(--edge);
  padding:8px 10px;
  text-align:left;
}

/* ---------- footer ---------- */

.foot{
  display:grid;
  grid-template-columns:1.7fr 1fr 1fr auto;
  gap:14px 28px;
  align-items:start;
  margin-top:8px;
  padding:clamp(22px,4vw,40px) 0 30px;
  border-top:1px solid var(--ink);
}

.foot p{margin:0}

.foot-brand{
  font-family:"Space Grotesk",sans-serif;
  font-weight:700;
  font-size:1.1rem;
  letter-spacing:-.01em;
}

.foot-links{
  display:flex;
  flex-wrap:wrap;
  gap:0 16px;
  font-size:.95rem;
}

.foot-links a{
  display:inline-flex;
  align-items:center;
  min-height:40px;
  color:var(--soft);
  text-decoration:none;
}

.foot-links a:hover{color:var(--ink)}

.foot-top a{
  display:inline-flex;
  align-items:center;
  min-height:40px;
  padding:0 18px;
  border:1px solid var(--ink);
  border-radius:999px;
  font-size:.95rem;
  text-decoration:none;
  transition:background .18s ease,color .18s ease;
}

.foot-top a:hover{background:var(--ink);color:#fff}

.foot small{
  grid-column:1/-1;
  padding-top:14px;
  border-top:1px solid rgba(31,31,31,.22);
  color:var(--soft);
  font-size:.9rem;
}

/* ---------- reveal ---------- */

@keyframes rise{
  from{opacity:0;transform:translateY(18px)}
  to{opacity:1;transform:none}
}

.reveal{
  opacity:0;
  animation:rise .6s cubic-bezier(.2,.7,.3,1) both;
  animation-play-state:paused;
}

.reveal.in{animation-play-state:running}

/* ---------- responsive ---------- */

@media (max-width:1000px){
  .stage{grid-template-columns:1fr}
  .rail{position:static}
  .panels{grid-template-columns:repeat(2,minmax(0,1fr))}
  .panels > article,
  .panels > article:nth-child(3n){grid-column:1/-1}
  .foot{grid-template-columns:1fr 1fr}
  .foot-top{grid-column:1/-1}
}

@media (max-width:640px){
  body{font-size:16px}
  .hero{min-height:56vh;align-items:flex-start;text-align:left}
  .hero h1{max-width:100%}
  .hero-sigil{right:-8%}
  .navline p{gap:0 2px}
  .navline a{padding:0 9px;font-size:.95rem}
  .panels{grid-template-columns:1fr}
  .foot{grid-template-columns:1fr;gap:6px 0}
  .foot small{margin-top:8px}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .panels > article{transition:none}
  .reveal{animation:none;opacity:1}
}

button[aria-expanded]{min-width:44px;min-height:44px}