:root{
  --bg:#E8ECF1;
  --ink:#1A2330;
  --muted:#5A6675;
  --zone:#2F4A6A;
  --zone-hi:#3D5F86;
  --allow:#2F8A6A;
  --deny:#B85C4A;
  --amber:#C49A3C;
  --line:#C5CED8;
  --panel:#F7F9FB;
  --white:#fff;
  --shadow:0 8px 0 rgba(26,35,48,.06);
  --font-display:"Bahnschrift","Segoe UI Condensed","Arial Narrow",sans-serif;
  --font-body:"Segoe UI","Microsoft YaHei UI","PingFang SC",sans-serif;
  --font-mono:"Cascadia Mono","Consolas","Courier New",monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;color:var(--ink);font-family:var(--font-body);line-height:1.55;
  background:
    linear-gradient(90deg,rgba(47,74,106,.04) 1px,transparent 1px) 0 0/48px 48px,
    linear-gradient(rgba(47,74,106,.04) 1px,transparent 1px) 0 0/48px 48px,
    var(--bg);
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
a:focus-visible{outline:2px solid var(--zone-hi);outline-offset:2px}
.wrap{width:min(1120px,92%);margin:0 auto}

/* admin bar */
.acl-bar{
  position:sticky;top:0;z-index:40;
  background:var(--panel);border-bottom:2px solid var(--ink);
}
.acl-bar-inner{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:.7rem 0}
.brand{display:flex;align-items:center;gap:.6rem}
.brand-box{
  width:2.1rem;height:2.1rem;display:grid;place-items:center;
  background:var(--zone);color:#fff;font-family:var(--font-display);font-weight:700;
  border:2px solid var(--ink);
}
.brand b{font-family:var(--font-display);letter-spacing:.06em;font-size:1.1rem}
.brand small{display:block;font-family:var(--font-mono);font-size:.68rem;color:var(--zone);letter-spacing:.08em;margin-top:.08rem}
.nav{display:flex;flex-wrap:wrap;gap:.75rem;font-size:.9rem}
.nav a{color:var(--muted);padding:.2rem .35rem;border:1px solid transparent}
.nav a:hover,.nav a.on{color:var(--ink);border-color:var(--ink);background:#fff}

/* signature: zone partition strip */
.zones{
  display:grid;grid-template-columns:repeat(5,1fr);gap:0;
  border:2px solid var(--ink);background:#fff;margin-top:0;
}
.zone-cell{
  padding:.45rem .55rem;border-right:1px solid var(--line);
  font-family:var(--font-mono);font-size:.68rem;letter-spacing:.04em;
}
.zone-cell:last-child{border-right:0}
.zone-cell strong{display:block;color:var(--zone);margin-bottom:.1rem}
.zone-cell span{color:var(--muted)}
.zone-cell.ok strong{color:var(--allow)}
.zone-cell.warn strong{color:var(--amber)}

/* hero — permission provision block */
.hero{padding:1.8rem 0 1.2rem}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:0;align-items:stretch;border:2px solid var(--ink);background:#fff}
.hero-copy{padding:1.4rem 1.25rem;border-right:2px solid var(--ink);background:var(--panel)}
.sig{font-family:var(--font-mono);font-size:.72rem;letter-spacing:.1em;color:var(--zone);margin-bottom:.5rem;text-transform:uppercase}
.hero h1{margin:0 0 .55rem;font-family:var(--font-display);font-size:clamp(1.8rem,3.8vw,2.6rem);line-height:1.12;letter-spacing:.02em}
.hero-lead{margin:0 0 1rem;color:var(--muted);max-width:34rem}
.cta-row{display:flex;flex-wrap:wrap;gap:.55rem;margin-bottom:.85rem}
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  min-width:9rem;padding:.68rem 1.05rem;border:2px solid var(--ink);
  font-family:var(--font-display);font-size:.92rem;letter-spacing:.03em;
  white-space:nowrap;word-break:keep-all;writing-mode:horizontal-tb;
  transition:transform .12s ease,background .12s ease;
}
.btn:hover{transform:translate(-1px,-1px);box-shadow:2px 2px 0 var(--ink)}
.btn-pri{background:var(--zone);color:#fff}
.btn-pri:hover{background:var(--zone-hi)}
.btn-sec{background:#fff;color:var(--ink)}
.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.55)}
.req{
  display:grid;grid-template-columns:1fr 1fr;gap:0;border:1px solid var(--line);
  font-size:.82rem;color:var(--muted);
}
.req div{padding:.55rem .6rem;border-right:1px solid var(--line);background:#fff}
.req div:last-child{border-right:0}
.req b{display:block;font-family:var(--font-mono);font-size:.68rem;color:var(--zone);margin-bottom:.12rem}
.hero-media{
  align-self:center;margin:0;padding:0;background:#0f1620;display:flex;align-items:center;
}
.hero-media img{
  display:block;width:100%;height:auto;object-fit:contain;object-position:center;
  margin:0;padding:0;min-height:0;max-height:none;clip-path:none;transform:none;
}

section{padding:1.8rem 0}
.block{
  border:2px solid var(--ink);background:#fff;box-shadow:var(--shadow);
}
.block-head{
  display:flex;justify-content:space-between;align-items:flex-end;gap:1rem;
  padding:.85rem 1rem;border-bottom:2px solid var(--ink);background:var(--panel);
}
.block-head h2{margin:0;font-family:var(--font-display);font-size:clamp(1.2rem,2.4vw,1.6rem);letter-spacing:.03em}
.block-head p{margin:0;color:var(--muted);font-size:.9rem;max-width:36rem}
.code{font-family:var(--font-mono);font-size:.68rem;color:var(--amber);letter-spacing:.1em}

/* download ACL cards */
.dl-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0}
.dl-card{
  padding:1rem .85rem;border-right:1px solid var(--line);
  display:flex;flex-direction:column;gap:.5rem;min-width:0;
}
.dl-card:last-child{border-right:0}
.dl-card .role{
  font-family:var(--font-mono);font-size:.68rem;color:var(--allow);letter-spacing:.06em;
}
.dl-card h3{margin:0;font-family:var(--font-display);font-size:1.1rem}
.dl-card img{
  width:100%;height:auto;object-fit:contain;object-position:center;
  margin:0;padding:0;border:1px solid var(--line);background:var(--bg);
}
.dl-card ul{margin:0;padding:0;list-style:none;font-size:.84rem;color:var(--muted)}
.dl-card li{display:flex;justify-content:space-between;gap:.35rem;padding:.2rem 0;border-bottom:1px dashed var(--line)}
.dl-card .btn{width:100%;margin-top:auto}

/* feature permission matrix */
.matrix{display:grid;grid-template-columns:repeat(5,1fr);gap:0}
.cell{
  padding:.9rem .75rem;border-right:1px solid var(--line);border-top:1px solid var(--line);
  background:#fff;
}
.cell:nth-child(-n+5){border-top:0}
.cell:nth-child(5n){border-right:0}
.cell .ico{
  width:1.9rem;height:1.9rem;margin-bottom:.5rem;display:grid;place-items:center;
  border:1px solid var(--ink);background:var(--panel);
  font-family:var(--font-mono);font-size:.68rem;color:var(--zone);font-weight:700;
}
.cell h3{margin:0 0 .3rem;font-size:.95rem;font-family:var(--font-display)}
.cell p{margin:0;font-size:.83rem;color:var(--muted)}

/* solution split blocks */
.solution{display:grid;grid-template-columns:1.05fr .95fr;gap:0;border:2px solid var(--ink);background:#fff}
.sol-copy{padding:1.2rem 1.1rem;border-right:2px solid var(--ink);background:var(--panel)}
.sol-copy h2{margin:0 0 .5rem;font-family:var(--font-display);font-size:1.45rem}
.sol-copy p{margin:0 0 .7rem;color:var(--muted)}
.sol-media{display:grid;gap:0}
.sol-media figure{margin:0;padding:0;border-bottom:1px solid var(--line);background:#0f1620}
.sol-media figure:last-child{border-bottom:0}
.sol-media img{
  display:block;width:100%;height:auto;object-fit:contain;object-position:center;
  margin:0;padding:0;min-height:0;max-height:none;clip-path:none;transform:none;
}
.pair{display:grid;grid-template-columns:1fr 1fr}
.pair figure{border-right:1px solid var(--line)}
.pair figure:last-child{border-right:0}

/* trust */
.trust{
  text-align:center;padding:1.4rem 1rem;border:2px solid var(--ink);
  background:var(--zone);color:#edf2f7;
}
.trust .big{font-family:var(--font-display);font-size:clamp(1.65rem,3.4vw,2.35rem);margin-bottom:.3rem}
.trust .big span{color:#F0D48A}
.trust p{margin:.2rem auto 1rem;max-width:34rem;opacity:.92}
.brands{display:flex;flex-wrap:wrap;justify-content:center;gap:.45rem}
.brands span{
  padding:.35rem .7rem;border:1px solid rgba(255,255,255,.35);
  font-family:var(--font-display);font-size:.88rem;background:rgba(0,0,0,.15);
}

/* news help */
.split{display:grid;grid-template-columns:1.1fr .9fr;gap:0;border:2px solid var(--ink);background:#fff}
.panel{padding:1rem;background:#fff}
.panel + .panel{border-left:2px solid var(--ink)}
.panel h2{margin:0 0 .7rem;font-family:var(--font-display);font-size:1.2rem}
.news{list-style:none;margin:0;padding:0}
.news li{padding:.55rem 0;border-bottom:1px solid var(--line)}
.news li:last-child{border-bottom:0}
.news time{display:block;font-family:var(--font-mono);font-size:.68rem;color:var(--zone);margin-bottom:.12rem}
.news a:hover{color:var(--zone)}
.faq details{border:1px solid var(--line);padding:.5rem .65rem;margin-bottom:.4rem;background:var(--panel)}
.faq summary{cursor:pointer;font-weight:600}
.faq p{margin:.4rem 0 0;font-size:.9rem;color:var(--muted)}

.cta-band{
  margin:1.6rem 0 1.4rem;border:2px solid var(--ink);color:#fff;
  background:linear-gradient(120deg,rgba(26,35,48,.88),rgba(47,74,106,.8)),url("5.png") center/cover no-repeat;
}
.cta-band .inner{padding:1.45rem 1.2rem}
.cta-band h2{margin:0 0 .4rem;font-family:var(--font-display);font-size:clamp(1.25rem,2.8vw,1.8rem)}
.cta-band p{margin:0 0 .85rem;max-width:36rem;opacity:.93}
.gains{display:flex;flex-wrap:wrap;gap:.4rem;margin-bottom:.85rem}
.gains span{padding:.28rem .55rem;border:1px solid rgba(255,255,255,.35);font-size:.8rem;background:rgba(0,0,0,.2);font-family:var(--font-mono)}

.foot{border-top:2px solid var(--ink);padding:1rem 0 1.4rem;font-size:.86rem;color:var(--muted);background:var(--panel)}
.foot-inner{display:flex;flex-wrap:wrap;justify-content:space-between;gap:.7rem}
.foot nav{display:flex;gap:.8rem}
.foot a:hover{color:var(--zone)}

.page-hero{padding:1.3rem 0;border-bottom:2px solid var(--ink);background:var(--panel)}
.page-hero h1{margin:0 0 .35rem;font-family:var(--font-display);font-size:clamp(1.4rem,2.8vw,1.95rem)}
.page-hero p{margin:0;color:var(--muted);max-width:40rem}
.help-grid{display:grid;grid-template-columns:1fr 1fr;gap:0;border:2px solid var(--ink)}
.help-card{padding:1rem;border-right:1px solid var(--line);border-bottom:1px solid var(--line);background:#fff}
.help-card:nth-child(2n){border-right:0}
.help-card:nth-child(n+3){border-bottom:0}
.help-card h3{margin:0 0 .35rem;font-family:var(--font-display)}
.help-card p{margin:0;font-size:.9rem;color:var(--muted)}

@media (max-width:960px){
  .hero-grid,.solution,.split,.zones{grid-template-columns:1fr}
  .hero-copy,.sol-copy,.panel + .panel{border-right:0;border-left:0;border-bottom:2px solid var(--ink)}
  .dl-grid{grid-template-columns:1fr 1fr}
  .matrix{grid-template-columns:repeat(3,1fr)}
  .cell:nth-child(5n){border-right:1px solid var(--line)}
  .cell:nth-child(3n){border-right:0}
}
@media (max-width:640px){
  .nav{display:none}
  .dl-grid,.matrix,.help-grid,.pair,.req{grid-template-columns:1fr}
  .dl-card,.cell,.help-card{border-right:0;border-bottom:1px solid var(--line)}
  .cta-row .btn{flex:1 1 100%}
}
.hero-grid{align-items:center}
.hero-media{align-self:center;height:auto;padding:0;margin:0;overflow:visible}
.hero-media img{
  display:block;width:100%;height:auto;object-fit:contain;object-position:center;
  margin:0;padding:0;min-height:0;max-height:none;clip-path:none;transform:none;
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .btn:hover{transform:none;box-shadow:none}
}