:root{
 --a4b-bg:#f5f9fd;--a4b-panel:#fff;--a4b-ink:#09233c;--a4b-muted:#4f6b82;
 --a4b-blue:#087df0;--a4b-cyan:#1eb7ff;--a4b-navy:#06192b;--a4b-line:#d7e5f0;
 --a4b-shadow:0 18px 50px rgba(3,36,65,.12);
}
html[data-theme="dark"]{
 --a4b-bg:#041321;--a4b-panel:#082238;--a4b-ink:#eef8ff;--a4b-muted:#a9c5d8;
 --a4b-line:#173d58;--a4b-shadow:0 18px 50px rgba(0,0,0,.34);
}
body{background:var(--a4b-bg)!important;color:var(--a4b-ink)!important}
.ai4biz-topbar{background:linear-gradient(90deg,#031829,#073c68,#06223b);color:#fff;border-bottom:1px solid rgba(255,255,255,.13)}
.ai4biz-topbar .wrap{max-width:1180px;margin:auto;padding:13px 22px;display:flex;align-items:center;justify-content:space-between;gap:18px}
.ai4biz-logo{width:min(310px,52vw);height:auto;display:block}
.ai4biz-topbar nav{display:flex;gap:14px;align-items:center;flex-wrap:wrap}
.ai4biz-topbar a{color:#d9efff;text-decoration:none;font-weight:700}
.ai4biz-theme{border:1px solid #6bbfff;background:#0b3150;color:#fff;border-radius:999px;padding:8px 12px;cursor:pointer}
.ai4biz-hero{position:relative;overflow:hidden;background:linear-gradient(115deg,rgba(3,21,36,.97),rgba(4,46,79,.94));color:#fff}
.ai4biz-hero:after{content:"";position:absolute;inset:0;background:radial-gradient(circle at 75% 40%,rgba(24,172,255,.27),transparent 34%),linear-gradient(90deg,transparent,rgba(255,255,255,.03));pointer-events:none}
.ai4biz-hero .inner{position:relative;z-index:1;max-width:1180px;margin:auto;padding:64px 22px 56px;display:grid;grid-template-columns:1.25fr .75fr;gap:35px;align-items:center}
.ai4biz-kicker{font-weight:800;letter-spacing:.14em;color:#54c7ff;text-transform:uppercase}
.ai4biz-hero h1{font-size:clamp(38px,6vw,70px);line-height:.98;margin:12px 0 18px;color:#fff}
.ai4biz-hero h1 span{color:#20b7ff}
.ai4biz-hero p{font-size:18px;line-height:1.65;color:#d5e8f5;max-width:760px}
.ai4biz-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:25px}
.ai4biz-btn{display:inline-block;padding:13px 18px;border-radius:10px;text-decoration:none!important;font-weight:800;border:1px solid #45bfff}
.ai4biz-btn.primary{background:linear-gradient(90deg,#087df0,#16a9ff);color:#fff}
.ai4biz-btn.ghost{color:#eaf7ff;background:rgba(255,255,255,.06)}
.ai4biz-growth{min-height:290px;border:1px solid rgba(120,205,255,.35);border-radius:22px;background:linear-gradient(160deg,rgba(12,64,101,.65),rgba(4,23,40,.45));padding:26px;box-shadow:inset 0 0 60px rgba(25,174,255,.09)}
.ai4biz-bars{height:170px;display:flex;align-items:end;gap:10px;border-bottom:1px solid #57c5ff;padding:0 8px}
.ai4biz-bars i{display:block;flex:1;background:linear-gradient(#23c5ff,#087df0);border-radius:7px 7px 0 0;box-shadow:0 0 20px rgba(30,183,255,.25)}
.ai4biz-growth strong{display:block;margin-top:18px;font-size:21px}.ai4biz-growth small{color:#a9d9f5}
.ai4biz-strip{max-width:1180px;margin:-1px auto 0;padding:22px;display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.ai4biz-pill{background:var(--a4b-panel);border:1px solid var(--a4b-line);border-radius:14px;padding:16px;box-shadow:var(--a4b-shadow);font-weight:800;color:var(--a4b-ink)}
.ai4biz-pill span{display:block;color:var(--a4b-blue);font-size:22px;margin-bottom:5px}
.ai4biz-brand-card{background:linear-gradient(135deg,#06233b,#0a568c);color:#fff!important;border:1px solid #187fc2!important}
.ai4biz-brand-card h2,.ai4biz-brand-card h3,.ai4biz-brand-card p{color:#fff!important}
.ai4biz-brand-card .muted{color:#c7e6f7!important}
.ai4biz-footer{margin-top:48px;background:#04192a;color:#cce6f7;padding:28px 22px}
.ai4biz-footer .inner{max-width:1180px;margin:auto;display:flex;justify-content:space-between;gap:22px;flex-wrap:wrap;align-items:center}
.ai4biz-footer img{width:220px}
.ai4biz-footer a{color:#67caff}
@media(max-width:820px){.ai4biz-hero .inner{grid-template-columns:1fr}.ai4biz-strip{grid-template-columns:1fr 1fr}.ai4biz-topbar .wrap{align-items:flex-start;flex-direction:column}}
@media(max-width:520px){.ai4biz-strip{grid-template-columns:1fr}}