@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500;600&family=Zen+Kaku+Gothic+New:wght@400;500;700;900&display=swap');

:root{
  --paper:#f5f0e8;
  --paper2:#eee8de;
  --ink:#171717;
  --muted:#6d6a64;
  --red:#c43d32;
  --blue:#365d7c;
  --line:#cbc4b8;
  --max:1160px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  color:var(--ink);
  background:var(--paper);
  font-family:system-ui,sans-serif;
  overflow-x:hidden;
  -webkit-text-size-adjust:100%;
}
body:before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  opacity:.22;
  background-image:radial-gradient(rgba(0,0,0,.075) .55px,transparent .55px);
  background-size:5px 5px;
  mix-blend-mode:multiply;
  z-index:10;
}
a{text-decoration:none;color:inherit}
.topline{height:5px;background:var(--red)}
.header{
  width:min(var(--max),calc(100% - 48px));
  margin:0 auto;
  padding:22px 0;
  display:flex;
  justify-content:space-between;
  align-items:center;
  border-bottom:1px solid var(--line);
}
.logo{display:flex;align-items:center;gap:12px}
.logo-box{
  width:38px;height:38px;
  display:grid;place-items:center;
  border:2px solid var(--ink);
  font-family:monospace;
  font-weight:600;font-size:1rem;
}
.logo-copy strong{display:block;font-size:.9rem;letter-spacing:.02em}
.logo-copy small{
  display:block;
  margin-top:1px;
  color:var(--muted);
  font-family:monospace;
  font-size:.53rem;
  letter-spacing:.11em;
}
.nav{display:flex;gap:25px;align-items:center}
.nav a{
  font-size:.78rem;
  font-weight:700;
  position:relative;
}
.nav a:after{
  content:"";
  position:absolute;
  left:0;right:100%;bottom:-6px;height:1px;background:var(--red);
  transition:right .2s;
}
.nav a:hover:after{right:0}
main{width:min(var(--max),calc(100% - 48px));margin:0 auto}
.hero{
  position:relative;
  min-height:700px;
  padding:100px 0 68px;
  display:flex;
  flex-direction:column;
  justify-content:center;
  border-bottom:1px solid var(--line);
}
.hero-stamp{
  position:absolute;
  top:90px;right:3%;
  width:160px;height:160px;
  border:1px solid rgba(196,61,50,.6);
  color:var(--red);
  border-radius:50%;
  transform:rotate(9deg);
  display:flex;align-items:center;justify-content:center;
  flex-direction:column;
  font-family:monospace;
  text-align:center;
}
.hero-stamp:before,.hero-stamp:after{
  content:"";
  position:absolute;
  inset:10px;
  border:1px dashed rgba(196,61,50,.55);
  border-radius:50%;
}
.hero-stamp span{font-size:.9rem;letter-spacing:.15em}
.hero-stamp b{font-size:.72rem;line-height:1.1;letter-spacing:.08em}
.kicker,.label{
  margin:0;
  color:var(--blue);
  font-family:monospace;
  font-size:.67rem;
  font-weight:600;
  letter-spacing:.14em;
}
.hero h1{
  margin:24px 0 24px;
  max-width:800px;
  font-size:clamp(3.6rem,10vw,8.4rem);
  line-height:.93;
  letter-spacing:-.065em;
  font-weight:900;
}
.hero h1 span{
  display:inline-block;
  color:var(--red);
}
.lead{
  font-size:clamp(1rem,2vw,1.25rem);
  font-weight:700;
  margin:0 0 10px;
}
.sublead{
  color:var(--muted);
  max-width:650px;
  margin:0;
  font-size:.92rem;
}
.hero-actions{display:flex;gap:10px;margin-top:31px}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:46px;
  padding:0 20px;
  font-size:.78rem;
  font-weight:900;
  border:1px solid var(--ink);
  transition:transform .18s,box-shadow .18s,background .18s;
}
.btn:hover{transform:translate(-2px,-2px);box-shadow:4px 4px 0 var(--ink)}
.btn-main{background:var(--ink);color:#fff}
.btn-sub{background:transparent}
.hero-meta{
  display:flex;gap:18px;flex-wrap:wrap;
  margin-top:46px;
  color:#817d75;
  font-family:monospace;
  font-size:.59rem;
  letter-spacing:.11em;
}
.notice{
  display:grid;
  grid-template-columns:150px 1fr;
  padding:25px 0;
  border-bottom:1px solid var(--line);
}
.notice-title{font-size:.73rem;font-weight:900;color:var(--red)}
.notice p{margin:0;font-size:.76rem;color:var(--muted)}
.section{
  display:grid;
  grid-template-columns:100px 1fr;
  gap:24px;
  padding:95px 0;
  border-bottom:1px solid var(--line);
  opacity:0;transform:translateY(16px);
  transition:opacity .6s ease,transform .6s ease;
}
.section.show,.notice.show,.join.show{opacity:1;transform:none}
.section-number{
  font-family:monospace;
  color:#928d84;
  font-size:.72rem;
  padding-top:8px;
}
.section-content{
  display:grid;
  grid-template-columns:minmax(280px, .78fr) 1fr;
  gap:70px;
}
.section-heading h2{
  margin:15px 0 0;
  font-size:clamp(2.2rem,5vw,4.8rem);
  line-height:1.02;
  letter-spacing:-.055em;
}
.section-text{padding-top:26px;max-width:620px}
.section-text p{font-size:.94rem;line-height:2;margin:0 0 20px;color:#4f4b45}
.section-text .strong{color:var(--red);font-weight:900}
.section-alt{background:var(--paper2);margin:0 calc((100% - var(--max))/2 * -1);padding-left:calc((100vw - min(var(--max),calc(100% - 48px)))/2);padding-right:calc((100vw - min(var(--max),calc(100% - 48px)))/2)}
.activity-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line)}
.activity{
  background:var(--paper2);
  min-height:240px;
  padding:25px;
}
.activity-no{
  font-family:monospace;
  color:var(--red);
  font-size:.64rem;
  font-weight:600;
}
.activity h3{margin:39px 0 12px;font-size:1.05rem}
.activity p{margin:0;color:var(--muted);font-size:.82rem;line-height:1.8}
.principles{border-top:1px solid var(--ink)}
.principle{
  display:grid;
  grid-template-columns:70px 1fr;
  gap:18px;
  padding:22px 0;
  border-bottom:1px solid var(--line);
}
.principle b{font-family:monospace;color:var(--blue);font-size:.72rem}
.principle span{font-size:1.1rem;font-weight:700}
.join{
  margin:95px 0 40px;
  border:1px solid var(--ink);
  opacity:0;transform:translateY(16px);
  transition:opacity .6s ease,transform .6s ease;
}
.join-inner{
  padding:36px;
  display:flex;
  justify-content:space-between;
  gap:30px;
  align-items:end;
  background:
    linear-gradient(135deg,transparent 49.5%,rgba(196,61,50,.08) 49.5%,rgba(196,61,50,.08) 50%,transparent 50%),
    var(--paper2);
}
.join h2{margin:12px 0;font-size:clamp(2rem,5vw,3.5rem);letter-spacing:-.05em;line-height:1}
.join p{margin:0;color:var(--muted);font-size:.82rem;max-width:620px}
.footer{width:min(var(--max),calc(100% - 48px));margin:0 auto;padding:0 0 55px}
.footer-rule{height:1px;background:var(--ink);margin-bottom:20px}
.footer-row{display:flex;justify-content:space-between;gap:20px;align-items:flex-start}
.footer-row strong{display:block;font-size:.83rem}
.footer-row span{
  display:block;
  margin-top:2px;
  color:var(--muted);
  font-family:monospace;
  font-size:.54rem;
  letter-spacing:.11em;
}
.footer-row>a{font-family:monospace;font-size:.64rem}
.footer-note{font-size:.7rem;color:var(--muted);margin:26px 0 5px}
.footer small{font-family:monospace;color:#969188;font-size:.55rem}
@media (max-width:860px){
  .header{
    width:min(var(--max),calc(100% - 32px));
    padding:18px 0 14px;
    flex-wrap:wrap;
    row-gap:12px;
  }
  main{width:min(var(--max),calc(100% - 32px))}
  .logo{min-width:0}
  .logo-copy{min-width:0}
  .logo-copy strong{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:60vw}
  .nav{
    order:3;
    width:100%;
    gap:18px;
    overflow-x:auto;
    padding:2px 0 5px;
    scrollbar-width:none;
    -webkit-overflow-scrolling:touch;
  }
  .nav::-webkit-scrollbar{display:none}
  .nav a{font-size:.7rem;white-space:nowrap;flex:0 0 auto}
  .hero{min-height:auto;padding:62px 0 52px}
  .hero-stamp{
    position:relative;
    top:auto;right:auto;
    align-self:flex-end;
    width:108px;height:108px;
    margin-bottom:18px;
  }
  .hero h1{font-size:clamp(3.2rem,11vw,5.8rem);margin:18px 0 20px}
  .lead{font-size:1rem;line-height:1.65}
  .sublead{font-size:.88rem;line-height:1.85}
  .hero-actions{margin-top:25px}
  .hero-meta{margin-top:34px;gap:10px 16px;font-size:.56rem}
  .section{grid-template-columns:44px 1fr;gap:12px;padding:70px 0}
  .section-content{grid-template-columns:1fr;gap:26px}
  .section-heading h2{font-size:clamp(2.2rem,10vw,4.1rem)}
  .section-text{padding-top:0}
  .section-text p{font-size:.92rem;line-height:1.95}
  .activity-grid{grid-template-columns:1fr}
  .activity{min-height:0;padding:22px}
  .activity h3{margin:28px 0 10px;font-size:1rem}
  .section-alt{margin:0 -16px;padding-left:16px;padding-right:16px}
  .principle{grid-template-columns:48px 1fr;gap:12px;padding:19px 0}
  .principle span{font-size:1rem;line-height:1.55}
  .join{margin:70px 0 34px}
  .join-inner{display:block;padding:27px}
  .join h2{font-size:clamp(2rem,9vw,3.2rem)}
  .join p{font-size:.8rem;line-height:1.8}
  .join .btn{margin-top:20px;width:100%}
  .footer{width:min(var(--max),calc(100% - 32px));padding-bottom:38px}
  .footer-row{gap:16px}
}

@media (max-width:620px){
  .topline{height:4px}
  .header{padding-top:15px}
  .logo-box{width:34px;height:34px}
  .logo-copy strong{font-size:.76rem;max-width:68vw}
  .logo-copy small{font-size:.45rem;letter-spacing:.08em}
  .nav{gap:17px;border-top:1px solid var(--line);padding-top:11px}
  .nav a{font-size:.66rem}
  .hero{padding:45px 0 42px}
  .hero-stamp{width:88px;height:88px;margin-bottom:15px}
  .hero-stamp:before,.hero-stamp:after{inset:7px}
  .hero-stamp span{font-size:.67rem}
  .hero-stamp b{font-size:.56rem}
  .kicker,.label{font-size:.58rem;letter-spacing:.1em}
  .hero h1{font-size:clamp(2.8rem,14.5vw,4.6rem);line-height:.95;letter-spacing:-.055em;margin:15px 0 18px}
  .lead{font-size:.93rem;line-height:1.7}
  .sublead{font-size:.82rem;line-height:1.8}
  .hero-actions{flex-direction:column;align-items:stretch;gap:8px;margin-top:21px}
  .btn{width:100%;min-height:48px;padding:0 16px;font-size:.74rem}
  .hero-meta{margin-top:26px;display:grid;grid-template-columns:1fr 1fr;gap:8px 14px;line-height:1.3}
  .notice{grid-template-columns:1fr;gap:7px;padding:19px 0}
  .notice p{font-size:.71rem;line-height:1.75}
  .section{grid-template-columns:1fr;gap:13px;padding:58px 0}
  .section-number{padding-top:0}
  .section-content{gap:21px}
  .section-heading h2{font-size:clamp(2rem,11vw,3.3rem);line-height:1.04}
  .section-text p{font-size:.88rem;line-height:1.9;margin-bottom:16px}
  .activity{padding:19px}
  .activity-no{font-size:.58rem}
  .activity h3{font-size:.98rem;margin:24px 0 9px}
  .activity p{font-size:.77rem;line-height:1.75}
  .principle{grid-template-columns:38px 1fr;gap:10px;padding:17px 0}
  .principle b{font-size:.64rem}
  .principle span{font-size:.9rem;line-height:1.5}
  .join{margin:55px 0 28px}
  .join-inner{padding:23px}
  .join h2{font-size:clamp(1.85rem,10vw,2.8rem)}
  .join p{font-size:.76rem;line-height:1.75}
  .footer-row{flex-direction:column}
  .footer-row strong{font-size:.76rem}
  .footer-row span{font-size:.47rem}
  .footer-note{font-size:.64rem;line-height:1.7;margin:20px 0 5px}
}

@media (max-width:390px){
  .header,main,.footer{width:calc(100% - 24px)}
  .logo{gap:9px}
  .logo-box{width:32px;height:32px}
  .logo-copy strong{font-size:.7rem;max-width:70vw}
  .logo-copy small{display:none}
  .nav{margin-left:-1px;margin-right:-1px}
  .hero{padding-top:38px}
  .hero-stamp{width:80px;height:80px}
  .hero h1{font-size:clamp(2.65rem,14.2vw,4rem)}
  .section{padding:52px 0}
  .section-heading h2{font-size:2rem}
  .principle span{font-size:.86rem}
  .join-inner{padding:20px}
}

@media (prefers-reduced-motion:reduce){
  *{scroll-behavior:auto!important;transition:none!important}
  .section,.notice,.join{opacity:1!important;transform:none!important}
}