/* ========== AITeam 推广落地页 ========== */
*{margin:0;padding:0;box-sizing:border-box;}

.at-page{font-family:'PingFang SC','Microsoft YaHei','Helvetica Neue',Arial,sans-serif;color:#1a1a2e;overflow-x:hidden;}

/* ===== Hero ===== */
.at-hero{
    position:relative;
    min-height:640px;
    background:linear-gradient(135deg,#0f0c29 0%,#302b63 50%,#24243e 100%);
    display:flex;align-items:center;justify-content:center;
    padding:80px 20px 60px;
    overflow:hidden;
}
.at-hero::before{
    content:'';position:absolute;top:-50%;left:-20%;
    width:600px;height:600px;border-radius:50%;
    background:radial-gradient(circle,rgba(118,75,162,0.3) 0%,transparent 70%);
    animation:at-float 8s ease-in-out infinite;
}
.at-hero::after{
    content:'';position:absolute;bottom:-30%;right:-10%;
    width:500px;height:500px;border-radius:50%;
    background:radial-gradient(circle,rgba(102,126,234,0.25) 0%,transparent 70%);
    animation:at-float 10s ease-in-out infinite reverse;
}
@keyframes at-float{0%,100%{transform:translateY(0);}50%{transform:translateY(-30px);}}

.at-hero-content{position:relative;z-index:2;max-width:1200px;width:100%;display:flex;align-items:center;gap:40px;flex-wrap:wrap;}
.at-hero-text{flex:1;min-width:320px;}
.at-hero-badge{
    display:inline-block;
    background:rgba(255,255,255,0.1);
    border:1px solid rgba(255,255,255,0.2);
    color:#a5b4fc;
    padding:6px 16px;border-radius:20px;
    font-size:0.85rem;margin-bottom:20px;
    backdrop-filter:blur(10px);
}
.at-hero h1{
    color:#fff;font-size:3rem;line-height:1.2;margin-bottom:16px;
    background:linear-gradient(135deg,#fff 0%,#c4b5fd 100%);
    -webkit-background-clip:text;-webkit-text-fill-color:transparent;
}
.at-hero-sub{color:#cbd5e1;font-size:1.15rem;line-height:1.7;margin-bottom:32px;max-width:520px;}
.at-hero-cta{display:flex;gap:16px;flex-wrap:wrap;}
.at-btn{
    display:inline-flex;align-items:center;gap:8px;
    padding:14px 32px;border-radius:12px;
    font-size:1rem;font-weight:600;text-decoration:none;
    transition:all 0.3s;cursor:pointer;border:none;
}
.at-btn-primary{
    background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);
    color:#fff;box-shadow:0 4px 20px rgba(102,126,234,0.4);
}
.at-btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 30px rgba(102,126,234,0.5);}
.at-btn-secondary{
    background:rgba(255,255,255,0.1);color:#fff;
    border:1px solid rgba(255,255,255,0.3);
    backdrop-filter:blur(10px);
}
.at-btn-secondary:hover{background:rgba(255,255,255,0.2);transform:translateY(-2px);}
.at-hero-visual{flex:1;min-width:320px;max-width:500px;}
.at-hero-visual img{width:100%;border-radius:16px;box-shadow:0 20px 60px rgba(0,0,0,0.4);}
.at-qr-popup{
    position:absolute;top:100%;left:0;
    background:#fff;border-radius:12px;padding:16px;
    box-shadow:0 8px 30px rgba(0,0,0,0.15);
    display:none;z-index:10;
}
.at-qr-wrap:hover .at-qr-popup{display:block;}
.at-qr-popup img{width:140px;height:140px;}
.at-qr-popup p{color:#333;font-size:0.8rem;text-align:center;margin-top:8px;}

/* ===== Stats Bar ===== */
.at-stats{
    background:#fff;padding:40px 20px;
    display:flex;justify-content:center;gap:60px;flex-wrap:wrap;
    border-bottom:1px solid #f1f5f9;
}
.at-stat{text-align:center;}
.at-stat-num{
    font-size:2.5rem;font-weight:800;
    background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);
    -webkit-background-clip:text;-webkit-text-fill-color:transparent;
}
.at-stat-label{color:#64748b;font-size:0.9rem;margin-top:4px;}

/* ===== Section Common ===== */
.at-section{padding:80px 20px;max-width:1200px;margin:0 auto;}
.at-section-gray{background:#f8fafc;}
.at-section-header{text-align:center;margin-bottom:60px;}
.at-section-tag{
    display:inline-block;color:#764ba2;font-size:0.85rem;
    font-weight:600;text-transform:uppercase;letter-spacing:1px;
    margin-bottom:12px;
}
.at-section-title{font-size:2.2rem;color:#1e293b;margin-bottom:12px;line-height:1.3;}
.at-section-desc{color:#64748b;font-size:1.05rem;max-width:640px;margin:0 auto;line-height:1.7;}

/* ===== Feature Row (alternating) ===== */
.at-feature{
    display:flex;align-items:center;gap:60px;margin-bottom:80px;
    flex-wrap:wrap;
}
.at-feature:last-child{margin-bottom:0;}
.at-feature-reverse .at-feature-content{order:2;}
.at-feature-content{flex:1;min-width:320px;}
.at-feature-visual{flex:1;min-width:320px;}
.at-feature-visual img{width:100%;border-radius:12px;box-shadow:0 12px 40px rgba(0,0,0,0.1);}
.at-feature-icon{
    width:56px;height:56px;border-radius:14px;
    display:flex;align-items:center;justify-content:center;
    font-size:1.5rem;margin-bottom:20px;
}
.at-feature-content h3{font-size:1.6rem;color:#1e293b;margin-bottom:12px;line-height:1.4;}
.at-feature-content p{color:#475569;line-height:1.8;margin-bottom:16px;}
.at-feature-list{list-style:none;padding:0;}
.at-feature-list li{
    padding:6px 0;color:#475569;
    display:flex;align-items:start;gap:10px;
}
.at-feature-list li::before{content:'✓';color:#764ba2;font-weight:bold;flex-shrink:0;margin-top:2px;}
.at-feature-img-placeholder{
    width:100%;aspect-ratio:16/10;border-radius:12px;
    background:linear-gradient(135deg,#e0e7ff 0%,#f3e8ff 100%);
    display:flex;align-items:center;justify-content:center;
    color:#764ba2;font-size:0.95rem;border:2px dashed #c4b5fd;
}

/* ===== Feature Cards Grid ===== */
.at-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:30px;}
.at-card{
    background:#fff;border-radius:16px;padding:32px 28px;
    border:1px solid #f1f5f9;
    transition:all 0.3s;
}
.at-card:hover{transform:translateY(-4px);box-shadow:0 12px 40px rgba(0,0,0,0.08);border-color:#e0e7ff;}
.at-card-icon{
    width:52px;height:52px;border-radius:12px;
    display:flex;align-items:center;justify-content:center;
    font-size:1.4rem;margin-bottom:18px;
}
.at-card h4{font-size:1.2rem;color:#1e293b;margin-bottom:8px;}
.at-card p{color:#64748b;line-height:1.7;font-size:0.95rem;}

/* ===== Workflow Steps ===== */
.at-workflow{display:flex;justify-content:center;gap:20px;flex-wrap:wrap;margin-top:40px;}
.at-step{
    flex:1;min-width:160px;max-width:200px;
    background:#fff;border-radius:12px;padding:24px 16px;
    text-align:center;position:relative;
    border:2px solid #f1f5f9;
}
.at-step-num{
    width:36px;height:36px;border-radius:50%;
    background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);
    color:#fff;font-size:0.9rem;font-weight:700;
    display:flex;align-items:center;justify-content:center;
    margin:0 auto 12px;
}
.at-step h5{font-size:1rem;color:#1e293b;margin-bottom:6px;}
.at-step p{font-size:0.82rem;color:#64748b;line-height:1.5;}
.at-step-arrow{font-size:1.5rem;color:#cbd5e1;align-self:center;}

/* ===== Model Logos ===== */
.at-models{display:flex;justify-content:center;gap:16px;flex-wrap:wrap;margin-top:30px;}
.at-model-tag{
    background:#fff;border:1px solid #e2e8f0;border-radius:8px;
    padding:10px 20px;color:#475569;font-size:0.9rem;font-weight:500;
}
.at-model-tag strong{color:#764ba2;}

/* ===== Target Users ===== */
.at-users{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:24px;}
.at-user-card{
    background:#fff;border-radius:14px;padding:28px 24px;
    border:1px solid #f1f5f9;text-align:center;
    transition:all 0.3s;
}
.at-user-card:hover{box-shadow:0 8px 30px rgba(0,0,0,0.06);}
.at-user-icon{font-size:2.5rem;margin-bottom:12px;}
.at-user-card h4{font-size:1.1rem;color:#1e293b;margin-bottom:8px;}
.at-user-card p{color:#64748b;font-size:0.9rem;line-height:1.6;}

/* ===== Pricing ===== */
.at-pricing-banner{
    background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);
    border-radius:20px;padding:50px 40px;
    text-align:center;color:#fff;position:relative;overflow:hidden;
}
.at-pricing-banner::before{
    content:'';position:absolute;top:-50%;right:-20%;
    width:400px;height:400px;border-radius:50%;
    background:rgba(255,255,255,0.05);
}
.at-pricing-banner h3{font-size:1.8rem;margin-bottom:12px;position:relative;}
.at-pricing-banner p{font-size:1.05rem;opacity:0.9;max-width:560px;margin:0 auto 24px;line-height:1.7;position:relative;}
.at-pricing-features{display:flex;justify-content:center;gap:30px;flex-wrap:wrap;margin-bottom:30px;position:relative;}
.at-pricing-feature{display:flex;align-items:center;gap:6px;font-size:0.9rem;}
.at-pricing-feature::before{content:'✓';font-weight:bold;}

/* ===== Final CTA ===== */
.at-cta{padding:80px 20px;text-align:center;background:#f8fafc;}
.at-cta-box{
    max-width:700px;margin:0 auto;
    background:linear-gradient(135deg,#0f0c29 0%,#302b63 100%);
    border-radius:24px;padding:60px 40px;
    position:relative;overflow:hidden;
}
.at-cta-box::before{
    content:'';position:absolute;top:-30%;left:-10%;
    width:300px;height:300px;border-radius:50%;
    background:radial-gradient(circle,rgba(102,126,234,0.2) 0%,transparent 70%);
}
.at-cta-box h2{color:#fff;font-size:2rem;margin-bottom:12px;position:relative;}
.at-cta-box p{color:#cbd5e1;font-size:1.05rem;margin-bottom:32px;position:relative;}
.at-cta-buttons{display:flex;justify-content:center;gap:16px;flex-wrap:wrap;position:relative;}

/* ===== Footer ===== */
.at-footer{background:#1a1a2e;color:#64748b;padding:40px 20px;text-align:center;}
.at-footer p{font-size:0.85rem;line-height:1.8;}
.at-footer a{color:#a5b4fc;text-decoration:none;}

/* ===== Responsive ===== */
@media(max-width:768px){
    .at-hero h1{font-size:2rem;}
    .at-hero-sub{font-size:1rem;}
    .at-section{padding:50px 16px;}
    .at-section-title{font-size:1.6rem;}
    .at-feature{gap:30px;margin-bottom:50px;}
    .at-feature-reverse .at-feature-content{order:0;}
    .at-stats{gap:30px;}
    .at-stat-num{font-size:1.8rem;}
    .at-pricing-banner{padding:35px 20px;}
    .at-cta-box{padding:40px 20px;}
    .at-cta-box h2{font-size:1.4rem;}
}