:root{
 --icn:#0066cc;
 --icn-dark:#004899;
 --icn-light:#eef6ff;
 --border:#dce7f5;
 --text:#111827;
 --muted:#6b7280;
 --navy:#0b1f3a;
}

*{
 margin:0;
 padding:0;
 box-sizing:border-box;
}

body{
 font-family:Inter,Segoe UI,sans-serif;
 background:white;
 color:var(--text);
 line-height:1.6;
}

/* ---------- Header ---------- */
header{
 position:sticky;
 top:0;
 z-index:50;
 background:rgba(255,255,255,.92);
 backdrop-filter:blur(8px);
 border-bottom:1px solid var(--border);
}

.hwrap{
 max-width:1200px;
 margin:auto;
 padding:14px 24px;
 display:flex;
 align-items:center;
 justify-content:space-between;
 gap:20px;
 flex-wrap:wrap;
}

.logo{font-size:1rem;color:var(--text);}
.logo b{color:var(--icn);font-weight:900;letter-spacing:-.5px;}
.logo span{color:var(--muted);font-size:.85rem;margin-left:6px;}

nav{display:flex;gap:6px;flex-wrap:wrap;}
nav a{
 font-size:.82rem;color:var(--muted);text-decoration:none;
 padding:6px 12px;border-radius:999px;transition:.2s;
}
nav a:hover{background:var(--icn-light);color:var(--icn);}

/* ---------- Hero ---------- */
.hero{padding:90px 24px 50px;text-align:center;max-width:920px;margin:auto;}

.eyebrow{
 display:inline-block;font-size:.78rem;font-weight:700;
 letter-spacing:.08em;text-transform:uppercase;color:var(--icn);
 background:var(--icn-light);padding:6px 14px;border-radius:999px;margin-bottom:22px;
}

.hero h1{font-size:3.4rem;font-weight:900;letter-spacing:-2px;line-height:1.1;}
.hero h1 em{
 font-style:normal;
 background:linear-gradient(135deg,#0066cc,#5ca9ff);
 -webkit-background-clip:text;-webkit-text-fill-color:transparent;
}
.hero .sub{margin-top:20px;color:var(--muted);font-size:1.15rem;}

/* ---------- Statement strip ---------- */
.statement-strip{
 max-width:1000px;margin:44px auto 0;padding:0 24px;
 display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px;
}
.statement-item{
 border:1px solid var(--border);border-radius:14px;padding:18px 20px;background:white;
}
.statement-not{
 font-size:.82rem;color:var(--muted);text-decoration:line-through;text-decoration-color:#c9d6e8;
}
.statement-is{font-size:1.15rem;font-weight:800;color:var(--icn-dark);margin-top:4px;}
.statement-is em{font-style:normal;color:var(--icn);}

/* ---------- Group sections ---------- */
.group{max-width:1200px;margin:0 auto;padding:70px 24px 0;}

.group-head{
 display:flex;align-items:baseline;gap:16px;
 border-bottom:2px solid var(--icn-light);padding-bottom:14px;margin-bottom:30px;
}
.group-head .num{
 font-size:2.6rem;font-weight:900;color:var(--icn-light);line-height:1;
 -webkit-text-stroke:1px var(--border);
}
.group-head .txt h2{font-size:1.7rem;color:var(--icn-dark);}
.group-head .txt p{color:var(--muted);margin-top:4px;font-size:.98rem;max-width:720px;}

.group-meta{
 display:flex;gap:8px;flex-wrap:wrap;margin-left:auto;align-self:center;
}
.group-meta span{
 font-size:.72rem;font-weight:600;color:var(--icn);
 background:var(--icn-light);padding:5px 11px;border-radius:999px;white-space:nowrap;
}

.grid{
 display:grid;grid-template-columns:repeat(auto-fit,minmax(290px,1fr));gap:18px;
}

.card{
 border:1px solid var(--border);border-radius:16px;padding:22px;transition:.2s;
}
.card:hover{border-color:var(--icn);transform:translateY(-3px);}

.card h3{
 color:var(--icn-dark);font-size:1.08rem;margin-bottom:8px;
 display:flex;align-items:center;gap:10px;
}
.card h3 .ico{
 width:34px;height:34px;flex:none;border-radius:9px;background:var(--icn-light);
 display:flex;align-items:center;justify-content:center;color:var(--icn);font-weight:800;font-size:.95rem;
}
.card p{color:var(--muted);font-size:.92rem;}

.tags{display:flex;gap:7px;flex-wrap:wrap;margin-top:14px;}
.tags span{
 background:#f3f6fb;color:var(--icn);padding:4px 11px;border-radius:999px;
 font-size:.72rem;font-weight:600;
}

/* ---------- Reasoning band ---------- */
.band{
 background:var(--navy);color:#e7eef8;margin-top:80px;padding:70px 24px;
}
.band-inner{max-width:900px;margin:auto;text-align:center;}
.band .ico-big{
 font-size:2.4rem;color:#5ca9ff;margin-bottom:12px;
}
.band h2{font-size:1.9rem;color:white;margin-bottom:14px;}
.band p{color:#9fb6d4;font-size:1.05rem;max-width:720px;margin:auto;}

.band .flowline{
 display:flex;align-items:center;justify-content:center;gap:14px;
 flex-wrap:wrap;margin-top:34px;
}
.band .node{
 background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.14);
 border-radius:12px;padding:14px 20px;font-weight:700;color:white;font-size:.95rem;
}
.band .arrow{color:#5ca9ff;font-size:1.3rem;}

/* ---------- Footer ---------- */
footer{
 margin-top:90px;border-top:1px solid var(--border);
 padding:40px 24px;text-align:center;color:var(--muted);font-size:.85rem;
}
footer b{color:var(--icn);}

@media(max-width:640px){
 .hero h1{font-size:2.3rem;}
 .group-head .num{font-size:2rem;}
 .group-meta{display:none;}
}