.ai-hero{background:linear-gradient(135deg,#1e3a8a,#2a7efb 58%,#1f8fff);color:#fff;padding:72px 0 60px;position:relative;overflow:hidden}
.ai-hero::before{content:"";position:absolute;inset:0;background-image:radial-gradient(rgba(255,255,255,.07) 1px,transparent 1px);background-size:28px 28px;pointer-events:none}
.ai-hero .container{position:relative;z-index:1}
.ai-hero-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:48px;align-items:center}
.ai-tag{display:inline-block;background:rgba(255,255,255,.13);border:1px solid rgba(255,255,255,.26);border-radius:99px;padding:6px 16px;font-size:13px;margin-bottom:18px}
.ai-hero h1{font-size:42px;line-height:1.28;font-weight:800;letter-spacing:-.8px;margin-bottom:16px}
.ai-hero h1 span{color:#93c5fd}
.ai-hero .lead{color:#dcecff;font-size:16px;line-height:1.95;max-width:700px}
.ai-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:28px}
.ai-keys{display:flex;gap:24px;flex-wrap:wrap;margin-top:28px;font-size:13px;color:#cfe7ff}
.ai-keys span{display:flex;align-items:center;gap:6px}
.ai-keys span::before{content:"";width:6px;height:6px;border-radius:50%;background:#7dd3fc}
.ai-check{background:rgba(8,29,66,.36);border:1px solid rgba(255,255,255,.2);border-radius:18px;padding:24px;box-shadow:0 24px 60px rgba(3,20,50,.26);backdrop-filter:blur(8px)}
.ai-check-head{display:flex;justify-content:space-between;gap:12px;align-items:center;padding-bottom:14px;border-bottom:1px solid rgba(255,255,255,.16);font-size:14px;font-weight:700;color:#dff2ff}
.ai-check-head span{font-size:11px;color:#9cc3ee;font-weight:500}
.ai-check-item{display:flex;gap:12px;margin-top:12px;padding:14px;border-radius:11px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.11)}
.ai-check-item b{width:26px;height:26px;border-radius:50%;background:rgba(125,211,252,.18);color:#a8dcff;display:grid;place-items:center;flex:none;font-size:12px}
.ai-check-item div{font-size:13.5px;line-height:1.7;color:#e7f4ff}
.ai-check-item small{display:block;color:#9cc3ee;font-size:12px;margin-top:3px}
.ai-check-note{margin-top:14px;font-size:12px;line-height:1.7;color:#a9c8e7}
.ai-sec{padding:64px 0}
.ai-sec h2{font-size:30px;font-weight:800;margin-bottom:10px}
.ai-sec-head{max-width:820px;margin-bottom:30px}
.ai-sec-head .kicker{display:inline-block;color:var(--primary);font-weight:700;font-size:13px;letter-spacing:1.8px;margin-bottom:10px}
.ai-sec-head h2{line-height:1.35;margin-bottom:10px}
.ai-sec-head p{color:var(--muted);font-size:15px;line-height:1.9;margin:0}
.ai-grid4{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:18px}
.ai-card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:24px 22px}
.ai-card .ic{font-size:28px;margin-bottom:12px}
.ai-card h3{font-size:17px;margin-bottom:8px}
.ai-card p{color:var(--muted);font-size:14px;line-height:1.8;margin:0}
.ai-prereq{background:#f0f7ff;border-top:1px solid #d8e9ff;border-bottom:1px solid #d8e9ff;padding:54px 0}
.ai-prereq-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px 18px}
.ai-prereq-item{background:#fff;border:1px solid #d8e6f7;border-radius:12px;padding:20px 22px}
.ai-prereq-item b{display:block;color:var(--ink);font-size:16px;margin-bottom:6px}
.ai-prereq-item p{color:var(--muted);font-size:13.5px;line-height:1.8;margin:0}
.ai-prereq-item .mini{display:inline-block;margin-top:8px;font-size:12px;color:var(--primary);font-weight:600}
.ai-note{background:#eaf4ff;border:1px solid #bfdbfe;color:#1e40af;border-radius:12px;padding:16px 20px;font-size:14px;line-height:1.85;margin-top:22px}
.ai-ind-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.ai-ind-card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:26px}
.ai-ind-head{display:flex;align-items:center;gap:12px;margin-bottom:12px}
.ai-ind-head .ic{font-size:30px}
.ai-ind-head b{font-size:19px;color:var(--ink)}
.ai-ind-head span{display:block;font-size:12.5px;color:var(--muted);font-weight:400;margin-top:2px}
.ai-ind-card>p{color:var(--muted);font-size:14px;line-height:1.85;margin:0 0 12px}
.ai-ind-card ul{margin:0 0 16px;padding-left:18px}
.ai-ind-card li{color:var(--muted);font-size:13.5px;line-height:1.85;margin-bottom:5px}
.ai-case-box{background:var(--bg-soft);border:1px solid var(--line);border-radius:11px;padding:16px 18px}
.ai-case-box b{display:block;color:var(--primary-dark);font-size:13px;margin-bottom:6px}
.ai-case-box p{color:var(--muted);font-size:13px;line-height:1.8;margin:0}
.ai-flow{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:14px}
.ai-step{background:#fff;border:1px solid var(--line);border-radius:12px;padding:20px 16px;text-align:center}
.ai-step .no{width:34px;height:34px;border-radius:50%;background:var(--primary);color:#fff;display:grid;place-items:center;margin:0 auto 9px;font-size:13px;font-weight:800}
.ai-step b{display:block;font-size:14.5px;margin-bottom:5px}
.ai-step p{color:var(--muted);font-size:12.5px;line-height:1.7;margin:0}
.ai-faq{display:grid;gap:10px;max-width:860px;margin:0 auto}
.ai-faq details{background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden}
.ai-faq summary{list-style:none;cursor:pointer;padding:17px 20px;font-weight:700;color:var(--ink);font-size:15px;display:flex;justify-content:space-between;gap:12px}
.ai-faq summary::-webkit-details-marker{display:none}
.ai-faq summary::after{content:"+";color:var(--primary);font-size:21px}
.ai-faq details[open] summary::after{content:"−"}
.ai-faq .faq-body{padding:0 20px 18px;color:var(--muted);font-size:14px;line-height:1.9}
.ai-cta{background:linear-gradient(135deg,#1e3a8a,#2a7efb);color:#fff;text-align:center;padding:58px 0}
.ai-cta h2{font-size:30px;margin-bottom:8px}
.ai-cta p{color:#dcecff;font-size:14.5px;line-height:1.8;margin-bottom:20px}
.ai-cta .btn-ghost{color:#fff;border:1.5px solid rgba(255,255,255,.5);background:transparent;margin-left:12px}
@media(max-width:980px){
  .ai-hero-grid,.ai-ind-grid{grid-template-columns:1fr}
  .ai-hero h1{font-size:35px}
  .ai-check{max-width:620px}
}
@media(max-width:680px){
  .ai-hero{padding:44px 0 38px}
  .ai-hero h1{font-size:30px}
  .ai-sec,.ai-prereq{padding:46px 0}
  .ai-sec-head h2,.ai-cta h2{font-size:24px}
  .ai-prereq-grid{grid-template-columns:1fr}
  .ai-ind-card{padding:22px 18px}
}