* {box-sizing:border-box;}
ul {list-style-type: none;}
body {font-family: Verdana,sans-serif;}
 

.container {
    margin:5px auto;
    width: 1100px;
}

.month {
    padding: 70px 25px;
    width: 100%;
    background: #1abc9c;
}
 
.month ul {
    margin: 0;
    padding: 0;
}
 
.month ul li {
    color: white;
    font-size: 20px;
    text-transform: uppercase;
    letter-spacing: 3px;
}
 
.month .prev {
    float: left;
    padding-top: 10px;
}
 
.month .next {
    float: right;
    padding-top: 10px;
}
 
.weekdays {
    margin: 0;
    padding: 10px 0;
    background-color: #ddd;
}
 
.weekdays li {
    display: inline-block;
    width: 13.6%;
    color: #666;
    text-align: center;
}
 
.days {
    padding: 10px 0;
    background: #eee;
    margin: 0;
}
 
.days li {
    list-style-type: none;
    display: inline-block;
    width: 14%;
    text-align: center;
    margin-bottom: 5px;
    font-size:12px;
    color: #777;
}
 
.days li .active {
    padding: 5px;
    background: #1abc9c;
    color: white !important
}
 
/* 添加不同尺寸屏幕的样式 */
@media screen and (max-width:720px) {
    .weekdays li, .days li {width: 13.1%;}
}
 
@media screen and (max-width: 420px) {
    .weekdays li, .days li {width: 12.5%;}
    .days li .active {padding: 2px;}
}
 
@media screen and (max-width: 290px) {
    .weekdays li, .days li {width: 12.2%;}