/* ========== AI自适应训练平台样式 ========== */
.ai-content{font-family:'Segoe UI','PingFang SC','Microsoft YaHei',sans-serif;color:#2d3436;background:#f8f9fa;padding:0;margin:0;}
.ai-content *,.ai-content *::before,.ai-content *::after{box-sizing:border-box;margin:0;padding:0;}
/* Hero */
.ai-hero{position:relative;z-index:1;min-height:55vh;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:70px 40px 50px;overflow:hidden;background:#fff;}
.ai-hero::before{content:'';position:absolute;inset:0;z-index:-1;background:radial-gradient(ellipse 80% 60% at 50% 40%,rgba(230,57,70,0.06),transparent),radial-gradient(ellipse 60% 80% at 80% 20%,rgba(192,57,43,0.04),transparent),radial-gradient(ellipse 50% 50% at 20% 80%,rgba(230,57,70,0.03),transparent);}
.ai-hero-badge{display:inline-flex;align-items:center;gap:8px;background:rgba(230,57,70,0.08);border:1px solid rgba(230,57,70,0.25);border-radius:30px;padding:8px 24px;font-size:13px;color:#e63946;font-weight:600;margin-bottom:28px;animation:aiBadgePulse 3s ease-in-out infinite;}
.ai-hero-badge .ai-dot{width:8px;height:8px;border-radius:50%;background:#e63946;animation:aiDotBlink 1.5s ease-in-out infinite;}
@keyframes aiBadgePulse{0%,100%{box-shadow:0 0 0 0 rgba(230,57,70,0)}50%{box-shadow:0 0 20px 4px rgba(230,57,70,0.15)}}
@keyframes aiDotBlink{0%,100%{opacity:1}50%{opacity:.3}}
.ai-hero h1{font-size:clamp(30px,5.5vw,56px);font-weight:900;line-height:1.15;margin-bottom:18px;color:#1a1a2e;animation:aiHeroTitle 1s ease-out;}
@keyframes aiHeroTitle{from{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}
.ai-hero-sub{font-size:clamp(13px,1.8vw,17px);color:#636e72;max-width:700px;line-height:1.8;margin-bottom:14px;animation:aiHeroSub 1s ease-out .2s both;}
@keyframes aiHeroSub{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}
.ai-hero-formula{display:flex;align-items:center;justify-content:center;gap:14px;flex-wrap:wrap;margin-bottom:18px;animation:aiHeroSub 1s ease-out .3s both;}
.ai-hero-formula-item{background:#fff;border:2px solid #e0e0e0;border-radius:12px;padding:10px 22px;font-size:15px;font-weight:800;color:#1a1a2e;transition:all .3s ease;box-shadow:0 2px 8px rgba(0,0,0,0.04);}
.ai-hero-formula-item:hover{border-color:#e63946;transform:translateY(-2px);box-shadow:0 6px 20px rgba(230,57,70,0.12);}
.ai-hero-formula-plus{font-size:20px;color:#e63946;font-weight:900;}
.ai-hero-formula-eq{background:linear-gradient(135deg,#e63946,#c0392b);border:none;border-radius:12px;padding:10px 22px;font-size:15px;font-weight:800;color:#fff;box-shadow:0 4px 16px rgba(230,57,70,0.2);}
.ai-hero-core{font-size:clamp(12px,1.4vw,15px);color:#636e72;max-width:600px;animation:aiHeroSub 1s ease-out .4s both;}
.ai-hero-core strong{color:#e63946;}
.ai-hero-stat{display:flex;justify-content:center;gap:40px;flex-wrap:wrap;margin-top:30px;animation:aiHeroSub 1s ease-out .5s both;}
.ai-hero-stat-item{text-align:center;}
.ai-hero-stat-item .ai-num{font-size:32px;font-weight:900;color:#e63946;}
.ai-hero-stat-item .ai-label{font-size:11px;color:#b2bec3;margin-top:4px;}
/* Section */
.ai-section-divider{width:100%;height:1px;background:linear-gradient(90deg,transparent,rgba(230,57,70,0.2),transparent);margin:0 auto;max-width:800px;}
.ai-section-header{text-align:center;padding:55px 40px 28px;}
.ai-section-tag{display:inline-block;font-size:10px;font-weight:700;letter-spacing:3px;text-transform:uppercase;color:#e63946;margin-bottom:10px;}
.ai-section-title{font-size:clamp(20px,3.2vw,34px);font-weight:900;line-height:1.2;color:#1a1a2e;margin-bottom:10px;}
.ai-section-desc{font-size:13px;color:#636e72;max-width:600px;margin:0 auto;line-height:1.7;}
.ai-text-red{color:#e63946;font-weight:700;}
/* Bloom */
.ai-bloom-section{padding:0 40px 55px;max-width:1100px;margin:0 auto;}
.ai-bloom-intro{background:#fff;border:1px solid #e0e0e0;border-radius:20px;padding:36px 40px;margin-bottom:36px;position:relative;overflow:hidden;box-shadow:0 4px 20px rgba(0,0,0,0.04);}
.ai-bloom-intro::before,.ai-gap-box::before,.ai-rev-box::before,.ai-correct-box::before,.ai-feature-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,#e63946,#c0392b,#e63946);background-size:200% 100%;animation:aiFeatureGlow 3s linear infinite;}
@keyframes aiFeatureGlow{0%{background-position:200% 0}100%{background-position:-200% 0}}
.ai-bloom-intro .ai-author{display:inline-flex;align-items:center;gap:8px;background:rgba(230,57,70,0.06);border:1px solid rgba(230,57,70,0.15);border-radius:8px;padding:6px 16px;font-size:12px;color:#e63946;font-weight:600;margin-bottom:18px;}
.ai-bloom-intro h2{font-size:clamp(18px,2.5vw,28px);font-weight:900;color:#1a1a2e;line-height:1.4;margin-bottom:14px;}
.ai-bloom-intro h2 span{color:#e63946;}
.ai-bloom-intro>p{font-size:13px;color:#636e72;line-height:1.9;}
.ai-bloom-intro p strong{color:#e63946;}
/* Condition Cards */
.ai-condition-cards{display:grid;grid-template-columns:1fr 1fr;gap:22px;}
.ai-condition-card{background:#fff;border:1px solid #e0e0e0;border-radius:16px;padding:28px 30px;box-shadow:0 4px 20px rgba(0,0,0,0.04);position:relative;overflow:hidden;transition:all .3s ease;}
.ai-condition-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,#e63946,#c0392b);transform:scaleX(0);transform-origin:left;transition:transform .5s ease;}
.ai-condition-card:hover::before{transform:scaleX(1);}
.ai-condition-card:hover{border-color:rgba(230,57,70,0.3);box-shadow:0 12px 40px rgba(230,57,70,0.1);}
.ai-condition-num{width:38px;height:38px;border-radius:50%;background:linear-gradient(135deg,#e63946,#c0392b);display:flex;align-items:center;justify-content:center;font-size:15px;font-weight:900;color:#fff;margin-bottom:14px;}
.ai-condition-card h3{font-size:17px;font-weight:800;color:#1a1a2e;margin-bottom:10px;}
.ai-condition-card>p{font-size:12px;color:#636e72;line-height:1.8;margin-bottom:12px;}
.ai-condition-detail{font-size:12px;color:#636e72;line-height:1.8;padding-top:12px;border-top:1px solid #f0f0f0;}
.ai-condition-detail strong{color:#e63946;}
.ai-detail-row{display:flex;align-items:flex-start;gap:8px;margin-bottom:6px;}
.ai-detail-row .ai-icon{color:#e63946;font-size:13px;flex-shrink:0;margin-top:2px;}
/* Gap */
.ai-gap-section{padding:0 40px 55px;max-width:1100px;margin:0 auto;}
.ai-gap-box{background:#fff;border:1px solid #e0e0e0;border-radius:20px;padding:36px 40px;box-shadow:0 4px 20px rgba(0,0,0,0.04);position:relative;overflow:hidden;}
.ai-gap-box h3{font-size:19px;font-weight:800;color:#1a1a2e;margin-bottom:14px;}
.ai-gap-box>p{font-size:13px;color:#636e72;line-height:1.9;margin-bottom:22px;}
.ai-gap-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;}
.ai-gap-col h4{font-size:13px;font-weight:700;margin-bottom:10px;}
.ai-gap-col.ai-elite h4{color:#e63946;}
.ai-gap-col.ai-normal h4{color:#636e72;}
.ai-gap-item{display:flex;align-items:flex-start;gap:8px;font-size:12px;color:#636e72;line-height:1.8;margin-bottom:6px;}
.ai-gap-item .ai-icon{flex-shrink:0;margin-top:2px;}
.ai-gap-col.ai-elite .ai-gap-item .ai-icon{color:#e63946;}
.ai-gap-col.ai-normal .ai-gap-item .ai-icon{color:#b2bec3;}
.ai-gap-conclusion{margin-top:22px;background:rgba(230,57,70,0.04);border:1px solid rgba(230,57,70,0.12);border-radius:12px;padding:14px 18px;font-size:13px;color:#636e72;line-height:1.8;}
.ai-gap-conclusion strong{color:#e63946;}
/* AI Revolution */
.ai-rev-section{padding:0 40px 55px;max-width:1100px;margin:0 auto;}
.ai-rev-box{background:#fff;border:1px solid #e0e0e0;border-radius:20px;padding:40px;box-shadow:0 4px 20px rgba(0,0,0,0.04);position:relative;overflow:hidden;}
.ai-rev-box h2{font-size:clamp(17px,2.3vw,24px);font-weight:900;color:#1a1a2e;margin-bottom:14px;}
.ai-rev-box>p{font-size:13px;color:#636e72;line-height:1.9;margin-bottom:22px;}
.ai-rev-core{display:flex;align-items:center;gap:14px;background:rgba(230,57,70,0.04);border:1px solid rgba(230,57,70,0.12);border-radius:14px;padding:18px 22px;margin-bottom:22px;}
.ai-rev-core .ai-icon-wrap{width:44px;height:44px;border-radius:50%;background:rgba(230,57,70,0.1);border:1px solid rgba(230,57,70,0.2);display:flex;align-items:center;justify-content:center;font-size:22px;flex-shrink:0;}
.ai-rev-core p{font-size:13px;color:#636e72;line-height:1.8;}
.ai-rev-core p strong{color:#e63946;}
.ai-rev-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;}
.ai-rev-item{background:#f8f9fa;border:1px solid #e8e8e8;border-radius:12px;padding:14px 16px;font-size:12px;color:#636e72;line-height:1.7;transition:all .3s ease;}
.ai-rev-item:hover{background:#fff;border-color:rgba(230,57,70,0.2);}
.ai-rev-item strong{color:#e63946;}
/* Correct AI */
.ai-correct-section{padding:0 40px 55px;max-width:1100px;margin:0 auto;}
.ai-correct-box{background:#fff;border:1px solid #e0e0e0;border-radius:20px;padding:36px 40px;box-shadow:0 4px 20px rgba(0,0,0,0.04);position:relative;overflow:hidden;}
.ai-correct-box h2{font-size:clamp(17px,2.3vw,24px);font-weight:900;color:#1a1a2e;margin-bottom:10px;}
.ai-correct-box>p{font-size:13px;color:#636e72;line-height:1.9;margin-bottom:22px;}
.ai-correct-flow{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;}
.ai-flow-step{background:#f8f9fa;border:1px solid #e0e0e0;border-radius:12px;padding:18px 14px;text-align:center;transition:all .3s ease;position:relative;}
.ai-flow-step:hover{background:#fff;border-color:rgba(230,57,70,0.2);transform:translateY(-4px);box-shadow:0 8px 20px rgba(0,0,0,0.06);}
.ai-flow-step .ai-step-num{width:26px;height:26px;border-radius:50%;background:linear-gradient(135deg,#e63946,#c0392b);display:flex;align-items:center;justify-content:center;font-size:11px;font-weight:900;color:#fff;margin:0 auto 10px;}
.ai-flow-step h4{font-size:13px;font-weight:700;color:#1a1a2e;margin-bottom:6px;}
.ai-flow-step p{font-size:11px;color:#636e72;line-height:1.6;}
.ai-flow-arrow{display:flex;align-items:center;justify-content:center;font-size:18px;color:#e63946;opacity:.4;}
.ai-correct-result{margin-top:22px;background:rgba(230,57,70,0.04);border:1px solid rgba(230,57,70,0.12);border-radius:12px;padding:14px 18px;font-size:13px;color:#636e72;line-height:1.8;}
.ai-correct-result strong{color:#e63946;}
.ai-correct-result .ai-highlight{color:#1a1a2e;font-weight:700;}
/* Features */
.ai-features-section{padding:0 40px 70px;max-width:1200px;margin:0 auto;}
.ai-feature-card{background:#fff;border:1px solid #e0e0e0;border-radius:20px;padding:36px 36px;margin-bottom:24px;position:relative;overflow:hidden;box-shadow:0 4px 20px rgba(0,0,0,0.04);transition:all .5s cubic-bezier(0.16,1,0.3,1);}
.ai-feature-card::before{transform:scaleX(0);transform-origin:left;transition:transform .5s ease;}
.ai-feature-card:hover::before{transform:scaleX(1);}
.ai-feature-card:hover{border-color:rgba(230,57,70,0.25);box-shadow:0 12px 40px rgba(230,57,70,0.1);}
.ai-feature-num{position:absolute;top:18px;right:28px;font-size:58px;font-weight:900;color:rgba(230,57,70,0.04);line-height:1;}
.ai-feature-header{display:flex;align-items:center;gap:14px;margin-bottom:14px;}
.ai-feature-icon{width:48px;height:48px;border-radius:14px;background:rgba(230,57,70,0.08);border:1px solid rgba(230,57,70,0.15);display:flex;align-items:center;justify-content:center;font-size:22px;flex-shrink:0;transition:all .3s ease;}
.ai-feature-card:hover .ai-feature-icon{box-shadow:0 0 20px rgba(230,57,70,0.15);transform:scale(1.05);}
.ai-feature-title-wrap h3{font-size:18px;font-weight:800;color:#1a1a2e;margin-bottom:3px;}
.ai-feature-title-wrap .ai-feature-en{font-size:10px;color:#e63946;font-weight:600;letter-spacing:1px;text-transform:uppercase;opacity:.7;}
.ai-feature-desc{font-size:13px;color:#636e72;line-height:1.85;margin-bottom:18px;}
.ai-feature-points{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;}
.ai-feature-point{background:#f8f9fa;border:1px solid #e8e8e8;border-radius:10px;padding:12px 14px;font-size:12px;color:#636e72;line-height:1.6;transition:all .3s ease;}
.ai-feature-point:hover{background:#fff;border-color:rgba(230,57,70,0.18);transform:translateY(-2px);box-shadow:0 4px 12px rgba(0,0,0,0.04);}
.ai-feature-point strong{color:#e63946;display:block;margin-bottom:3px;font-size:10px;text-transform:uppercase;letter-spacing:1px;}
/* CTA */
.ai-cta-section{padding:50px 40px 70px;text-align:center;position:relative;overflow:hidden;}
.ai-cta-section::before{content:'';position:absolute;inset:0;z-index:-1;background:radial-gradient(ellipse 70% 50% at 50% 50%,rgba(230,57,70,0.06),transparent);}
.ai-cta-box{max-width:700px;margin:0 auto;background:#fff;border:1px solid #e0e0e0;border-radius:24px;padding:44px 36px;box-shadow:0 8px 32px rgba(0,0,0,0.06);position:relative;overflow:hidden;}
.ai-cta-box::before{content:'';position:absolute;inset:-1px;border-radius:24px;background:linear-gradient(135deg,rgba(230,57,70,0.12),transparent,rgba(192,57,43,0.08));z-index:-1;animation:aiCtaGlow 4s ease-in-out infinite alternate;}
@keyframes aiCtaGlow{0%{opacity:.3}100%{opacity:.8}}
.ai-cta-box h2{font-size:26px;font-weight:900;margin-bottom:10px;color:#1a1a2e;}
.ai-cta-box p{font-size:13px;color:#636e72;line-height:1.8;margin-bottom:24px;}
.ai-cta-btn{display:inline-block;background:linear-gradient(135deg,#e63946,#c0392b);color:#fff;font-size:14px;font-weight:700;padding:13px 36px;border-radius:12px;text-decoration:none;transition:all .3s ease;box-shadow:0 8px 32px rgba(230,57,70,0.28);position:relative;overflow:hidden;cursor:pointer;}
.ai-cta-btn::before{content:'';position:absolute;inset:0;background:linear-gradient(135deg,rgba(255,255,255,0.2),transparent);opacity:0;transition:opacity .3s ease;}
.ai-cta-btn:hover{transform:translateY(-2px);box-shadow:0 12px 40px rgba(230,57,70,0.4);}
.ai-cta-btn:hover::before{opacity:1;}
/* Footer */
.ai-footer{text-align:center;padding:30px 40px;background:#fff;border-top:1px solid #e0e0e0;font-size:12px;color:#b2bec3;}
.ai-footer .ai-footer-brand{color:#e63946;font-weight:700;font-size:13px;margin-bottom:4px;}
/* Reveal */
.ai-reveal{opacity:0;transform:translateY(30px);transition:opacity .7s ease,transform .7s ease;}
.ai-reveal.visible{opacity:1;transform:translateY(0);}
/* Responsive */
@media (max-width:900px){
  .ai-condition-cards,.ai-gap-grid,.ai-rev-grid{grid-template-columns:1fr;}
  .ai-correct-flow{grid-template-columns:1fr 1fr;}
  .ai-feature-points{grid-template-columns:1fr;}
}
@media (max-width:600px){
  .ai-hero{padding:50px 18px 35px;}
  .ai-section-header{padding:35px 18px 18px;}
  .ai-bloom-section,.ai-gap-section,.ai-rev-section,.ai-correct-section,.ai-features-section,.ai-cta-section{padding:0 18px 40px;}
  .ai-bloom-intro,.ai-rev-box,.ai-correct-box,.ai-cta-box{padding:24px 20px;}
  .ai-feature-card{padding:24px 20px;}
  .ai-hero-formula{gap:8px;}
  .ai-hero-formula-item,.ai-hero-formula-eq{padding:8px 16px;font-size:13px;}
  .ai-hero-stat{gap:20px;}
  .ai-correct-flow{grid-template-columns:1fr;}
  .ai-flow-arrow{display:none;}
}