* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html{
    overflow-y: scroll; 
}

body {
    font-family: "Arial", sans-serif;
    color: #333;
    padding-top: 0;
    background-color: #f5f7fa;
}

main {
    width: 1200px;
    margin: 30px auto; 
    /*display: flex; */
    gap: 30px; 
}

img {
    display: block;
    max-width: 100%;
}

button {
    border: none;
    outline: none;
    cursor: pointer;
}

ul, li {
    list-style: none;
}

a {
    text-decoration: none;
    color: #333;
}

/* footer */
footer {
    margin-top: 50px;
    padding: 30px 0;
    border-top: 1px solid #eee;
}

.footer-nav ul {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-bottom: 15px;
}

.footer-nav li a {
    font-size: 14px;
    color: #666;
}

.footer-nav li a:hover {
    color: #ff6700;
}

footer p {
    text-align: center;
    font-size: 12px;
    color: #999;
}