body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #90ee90; /* 绿色环保色背景 */
}

header {
    background-color: #4CAF50;
    color: white;
    padding: 1rem;
    text-align: center;
}

main {
    padding: 10px;
}
h3{
    line-height: 20px;
}

.module {
    margin-bottom: 2rem;
    background-color: white;
    padding: 10px;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

.module h2 {
    margin-top: 0;
}

.resource-item, .activity-item {

}

.resource-item img, .activity-item img {
    width: 100%;
    /*max-width: 300px;*/
    border-radius: 8px;

}

.resource-item p, .activity-item p {
    /*text-align: center;*/
}
p{
    line-height: 14px;
}
form {
    display: flex;
    flex-direction: column;
}

label {
    margin-bottom: 0.5rem;
    font-weight: bold;
}

input, textarea {
    padding: 0.5rem;
    margin-bottom: 1rem;
    border: 1px solid #ccc;
    border-radius: 4px;
}

button {
    padding: 0.5rem 1rem;
    background-color: #4CAF50;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
}

button:hover {
    background-color: #45a049;
}

.menu{
    display: flex;
    width: 100%;
}
.menu div{
    width: 33%;
    text-align: center;
    padding: 5px 0px;
    border-radius: 10px;
}
.menu .active{
    color:#4CAF50;
    background-color: white;

}