/* ============================================
   METAMM OPC · Editorial Design System
   ============================================ */

:root{
  --black:#0a0a0a;
  --ink:#141414;
  --white:#fff;
  --paper:#fbfaf7;
  --gray-50:#f7f6f2;
  --gray-100:#efeee9;
  --gray-200:#e2e0d9;
  --gray-300:#c7c4ba;
  --gray-400:#a8a49a;
  --gray-500:#787470;
  --gray-600:#4e4b46;
  --gray-700:#2e2c29;
  --border:#e2e0d9;
  --accent:#b8935a;
  --text-primary:#0a0a0a;
  --text-secondary:#4e4b46;
  --text-muted:#787470;
}

*{margin:0;padding:0;box-sizing:border-box}
*::selection{background:#0a0a0a;color:#fff}
html{scroll-behavior:smooth;scroll-padding-top:90px}
body{
  font-family:'Space Grotesk','Inter',system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;
  background:var(--paper);color:var(--text-primary);
  line-height:1.55;overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  font-feature-settings:"ss01","ss02";
}
h1,h2,h3,h4,h5,h6{
  font-family:'Space Grotesk',sans-serif;
  font-weight:700;letter-spacing:-.035em;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button{font-family:inherit;cursor:pointer;border:none;background:none}

/* ============ Top Ribbon ============ */
.ribbon{
  background:var(--black);color:var(--paper);
  font-size:.64rem;letter-spacing:.32em;text-transform:uppercase;
  padding:.55rem 2rem;text-align:center;
  font-weight:500;
  position:relative;z-index:101;
}
.ribbon span{opacity:.6;margin:0 .5rem}

/* ============ Nav ============ */
.nav{
  position:sticky;top:0;left:0;right:0;z-index:100;
  padding:1rem 2rem;
  background:rgba(251,250,247,.9);
  backdrop-filter:blur(20px) saturate(180%);
  -webkit-backdrop-filter:blur(20px) saturate(180%);
  border-bottom:1px solid var(--border);
  transition:padding .25s ease;
}
.nav-inner{
  max-width:1440px;margin:0 auto;
  display:flex;align-items:center;justify-content:space-between;
  gap:1rem;
}
.logo{display:flex;align-items:center;gap:.65rem}
.logo-mark{
  width:32px;height:32px;background:var(--black);color:var(--paper);
  display:flex;align-items:center;justify-content:center;
  font-weight:700;font-size:1rem;letter-spacing:-.05em;
  font-family:'Space Grotesk',sans-serif;
}
.logo-main{
  font-family:'Space Grotesk',sans-serif;
  font-weight:700;font-size:1.15rem;
  letter-spacing:-.035em;text-transform:uppercase;
  color:var(--black);
}
.logo-sub{
  font-weight:400;font-size:.6rem;
  color:var(--text-muted);
  letter-spacing:.32em;text-transform:uppercase;
  padding:.12rem .5rem;border:1px solid var(--border);
  margin-left:.2rem;
}
.nav-links{display:flex;align-items:center;gap:2.2rem}
.nav-link{
  font-size:.7rem;font-weight:500;
  text-transform:uppercase;letter-spacing:.22em;
  position:relative;padding:.25rem 0;
  color:var(--text-primary);
  transition:color .2s;
}
.nav-link .num{
  color:var(--text-muted);font-size:.58rem;
  margin-right:.3rem;letter-spacing:.1em;
}
.nav-link::after{
  content:"";position:absolute;left:0;bottom:-4px;
  width:0;height:1px;background:var(--black);
  transition:width .3s ease;
}
.nav-link.active::after,.nav-link:hover::after{width:100%}

/* ============ Buttons ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.6rem;
  padding:.85rem 1.4rem;border-radius:0;border:none;
  font-family:'Space Grotesk',sans-serif;font-weight:500;font-size:.68rem;
  text-transform:uppercase;letter-spacing:.22em;
  transition:all .25s ease;cursor:pointer;white-space:nowrap;
  text-decoration:none;
}
.btn-primary{background:var(--black);color:var(--paper)}
.btn-primary:hover{background:var(--gray-700);transform:translateY(-1px)}
.btn-ghost{background:transparent;color:var(--black);border:1px solid var(--black)}
.btn-ghost:hover{background:var(--black);color:var(--paper)}
.btn-arrow{display:inline-block;transition:transform .3s ease}
.btn:hover .btn-arrow{transform:translateX(4px)}

/* ============ Section Common ============ */
.block{padding:7rem 2.5rem;position:relative}
.inner{max-width:1440px;margin:0 auto}
.narrow{max-width:1080px;margin:0 auto}

.eyebrow{
  display:flex;align-items:center;gap:.6rem;
  font-size:.65rem;font-weight:500;
  color:var(--text-muted);
  text-transform:uppercase;letter-spacing:.3em;
}
.eyebrow-line{
  width:28px;height:1px;background:currentColor;opacity:.5;
}

.section-head{
  display:grid;grid-template-columns:1fr;gap:1rem;
  margin-bottom:5rem;align-items:end;
}
.section-head.split{
  grid-template-columns:1fr auto;
}
.section-title{
  font-size:clamp(2.2rem,5.5vw,4rem);
  letter-spacing:-.045em;line-height:.95;
}
.section-title em{
  font-style:italic;font-weight:400;
  color:var(--text-muted);
}
.section-subtitle{
  font-size:.95rem;color:var(--text-secondary);
  max-width:440px;line-height:1.7;
}
.section-num{
  font-family:'Space Grotesk',sans-serif;font-weight:500;
  font-size:.7rem;letter-spacing:.32em;color:var(--text-muted);
  text-transform:uppercase;
  display:flex;align-items:center;gap:.6rem;
}
.section-num span{font-size:1.4rem;font-weight:300;letter-spacing:-.04em;color:var(--black)}

/* Reveal animation */
.reveal{opacity:0;transform:translateY(28px);transition:opacity .8s ease,transform .8s ease}
.reveal.in{opacity:1;transform:translateY(0)}

/* ============ Breadcrumb ============ */
.breadcrumb{
  max-width:1440px;margin:0 auto;
  padding:2.5rem 2.5rem 0;
  display:flex;align-items:center;gap:.7rem;
  font-size:.65rem;text-transform:uppercase;letter-spacing:.22em;
  color:var(--text-muted);
}
.breadcrumb a{color:var(--text-muted);transition:color .2s}
.breadcrumb a:hover{color:var(--black)}
.breadcrumb .sep{color:var(--gray-300);font-weight:300}
.breadcrumb .current{color:var(--black);font-weight:500}

/* ============ Page Header ============ */
.page-head{
  padding:2.5rem 2.5rem 5rem;max-width:1440px;margin:0 auto;
  border-bottom:1px solid var(--border);
  display:grid;grid-template-columns:1fr auto;gap:3rem;align-items:end;
}
.page-head .page-meta{display:flex;flex-direction:column;gap:.5rem}
.page-head h1{
  font-size:clamp(2.8rem,6vw,5rem);
  letter-spacing:-.045em;line-height:.92;margin:1rem 0 1.4rem;
}
.page-head h1 em{font-style:italic;font-weight:400;color:var(--text-muted)}
.page-head .desc{
  font-size:1rem;color:var(--text-secondary);
  max-width:600px;line-height:1.7;
}
.page-head .page-stats{
  display:flex;flex-direction:column;gap:.3rem;text-align:right;
  font-size:.65rem;text-transform:uppercase;letter-spacing:.22em;color:var(--text-muted);
}
.page-head .page-stats .big{
  font-size:3rem;color:var(--black);font-weight:300;
  letter-spacing:-.04em;line-height:1;margin-bottom:.3rem;
}

/* ============ Manifesto (shared) ============ */
.manifesto{
  background:var(--black);color:var(--paper);
  padding:7rem 2.5rem;position:relative;overflow:hidden;
}
.manifesto *{color:var(--paper)}
.manifesto::before{
  content:"";position:absolute;inset:0;
  background-image:
    linear-gradient(to right,rgba(255,255,255,.035) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(255,255,255,.035) 1px,transparent 1px);
  background-size:56px 56px;
  mask-image:radial-gradient(ellipse at center,#000 10%,transparent 70%);
  -webkit-mask-image:radial-gradient(ellipse at center,#000 10%,transparent 70%);
}
.manifesto-inner{max-width:960px;margin:0 auto;text-align:center;position:relative;z-index:2}
.manifesto-label{
  display:inline-block;
  font-size:.66rem;letter-spacing:.4em;text-transform:uppercase;
  color:var(--gray-400);margin-bottom:3rem;
  padding:.45rem 1.1rem;border:1px solid var(--gray-700);
  font-weight:500;
}
.manifesto-quote{
  font-family:'Space Grotesk',sans-serif;
  font-weight:500;
  font-size:clamp(1.35rem,3.2vw,2.6rem);
  line-height:1.4;letter-spacing:-.02em;
  margin-bottom:3rem;text-transform:none;
  color:var(--gray-400);
}
.manifesto-quote strong{
  display:inline-block;padding:.05em .3em;
  background:var(--paper);color:var(--black);
  font-weight:700;margin:0 .1em;
}
.manifesto-quote em{font-style:italic;color:var(--paper);font-weight:400}
.manifesto-author{
  font-size:.68rem;color:var(--gray-400);
  text-transform:uppercase;letter-spacing:.35em;font-weight:500;
}

/* ============ Footer ============ */
.footer{
  padding:4rem 2.5rem 2.5rem;border-top:1px solid var(--border);
  background:var(--paper);
}
.footer-inner{
  max-width:1440px;margin:0 auto;
  display:grid;grid-template-columns:1.2fr 1fr 1fr 1fr;gap:3rem;
  padding-bottom:3rem;border-bottom:1px solid var(--border);
}
.footer-col h5{
  font-size:.68rem;letter-spacing:.25em;text-transform:uppercase;
  margin-bottom:1.2rem;color:var(--text-muted);font-weight:500;
}
.footer-col a{
  display:block;font-size:.85rem;color:var(--text-primary);
  padding:.3rem 0;transition:color .2s;
}
.footer-col a:hover{color:var(--accent)}
.footer-col p{
  font-size:.85rem;color:var(--text-secondary);line-height:1.7;
}
.footer-brand{
  font-family:'Space Grotesk',sans-serif;font-weight:700;
  font-size:1.4rem;letter-spacing:-.04em;color:var(--black);
  margin-bottom:1rem;display:flex;align-items:center;gap:.5rem;
}
.footer-brand .mark{
  width:32px;height:32px;background:var(--black);color:var(--paper);
  display:inline-flex;align-items:center;justify-content:center;
  font-size:1rem;
}
.footer-bottom{
  max-width:1440px;margin:2rem auto 0;
  display:flex;justify-content:space-between;align-items:center;
  font-size:.62rem;text-transform:uppercase;letter-spacing:.22em;
  color:var(--text-muted);gap:1rem;flex-wrap:wrap;
}

/* ============ Card & Tag Utilities ============ */
.tag{
  display:inline-block;
  padding:.3rem .6rem;font-size:.6rem;
  background:var(--gray-100);color:var(--black);
  text-transform:uppercase;letter-spacing:.15em;font-weight:500;
}
.tag-dark{background:var(--black);color:var(--paper)}
.tag-outline{background:transparent;border:1px solid var(--black)}

/* ============ Responsive ============ */
@media(max-width:1024px){
  .block{padding:5rem 1.5rem}
  .ribbon{font-size:.58rem;padding:.5rem 1rem}
  .section-head.split{grid-template-columns:1fr;gap:2rem}
  .page-head{grid-template-columns:1fr;gap:1.5rem}
  .page-head .page-stats{text-align:left}
  .footer-inner{grid-template-columns:1fr 1fr;gap:2rem}
}
@media(max-width:768px){
  .nav{padding:.7rem 1rem}
  .logo-main{font-size:1rem}
  .logo-sub{font-size:.52rem;padding:.1rem .4rem;letter-spacing:.25em}
  .logo-mark{width:28px;height:28px;font-size:.9rem}
  .nav-links{gap:.75rem}
  .nav-link{display:none}
  .btn{padding:.65rem .95rem;font-size:.58rem;letter-spacing:.15em}
  .block{padding:3.5rem 1.15rem}
  .ribbon{display:none}
  .page-head{padding:1.5rem 1.15rem 3rem}
  .breadcrumb{padding:4.5rem 1.15rem 0;font-size:.58rem;letter-spacing:.18em;gap:.4rem}
  .footer{padding:3rem 1.15rem 1.5rem}
  .footer-inner{grid-template-columns:1fr;gap:1.8rem;padding-bottom:2rem}
  .footer-bottom{flex-direction:column;text-align:center;gap:.8rem}
  .section-head{margin-bottom:3rem}
  .manifesto{padding:4rem 1.15rem}
}