body{font-family:Microsoft YaHei;background:#f3f6fa;margin:0;}
header{background:#075ecf;color:white;text-align:center;padding:25px;}
main{max-width:900px;margin:30px auto;background:white;padding:25px;border-radius:15px;}
.cards{display:flex;gap:10px;flex-wrap:wrap;}
.cards div{background:#e8f1ff;padding:20px;flex:1;text-align:center;border-radius:10px;}
textarea{width:100%;height:120px;padding:10px;}
button{background:#075ecf;color:white;border:0;padding:12px 35px;margin-top:15px;border-radius:8px;}
#result{margin-top:25px;background:#f8f8f8;padding:20px;line-height:1.8;}