/* ========== 小屏幕媒体查询优化 ========== */
@media (max-width: 640px){
    .hero {
        padding:24px 0;
    }
    .tool-card {
        padding:18px;
    }
}

 
footer {
    margin-top:60px;
    padding:30px 0;
    background:#222;
    color:#fff;
    text-align:center;
}
footer a {
    color:#89cff0;
    text-decoration:none;
}
footer a:hover{
    text-decoration:underline;
}