.ai-card{max-width:520px;margin:40px auto;padding:24px;border-radius:14px;box-shadow:0 12px 30px rgba(0,0,0,.08);}
.ai-btn{width:100%;padding:14px;background:#000;color:#fff;border-radius:10px;font-weight:600;border:none;}
.ai-pre{background:#f6f7f9;padding:16px;border-radius:10px;margin-top:16px;}
.mechanic-box{border:1px solid #e5e7eb;padding:20px;border-radius:12px;margin-bottom:20px;}