html, body {
    font-family: Arial, sans-serif;
    background: #f5f7fa;
    height: 100%;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.container {
    width: 80%;
    min-width: 960px;
    flex: 1;
    margin: 10px auto !important;
    padding: 60px 20px 20px !important;
    /*padding-top: 60px; 这是因为导航栏固定高度60px*/
}

textarea {
    width: 100%;
    height: 150px;
    margin: 10px 0;
}

.buttons button {
    margin-right: 10px;
    padding: 10px 20px;
}

.content {
    min-width: 960px;
    height: 100%;
    display: flex;
    flex-direction: column;
    flex: 1;
}

.margin-top-10 {
    margin-top: 10px;
}