.banner1 {
    background: url('../images/chilaban.png');
    width: 100%;
    height: 80px;
}

h2 {
    text-align: left;
    margin-left: 100px;
    line-height: 80px;
    font-size: 40px;
}

h2 span {
    color: #006bb0;
}

h3 {
    margin-left:20px;
    cursor: pointer;
    display: flex;
    align-items: center;
}
h3 span{
    display: inline-block;
    margin-right:20px;
    border-top: 10px solid transparent;
    border-right: 10px solid transparent;
    border-bottom: 10px solid transparent;
    border-left: 10px solid #ff5555;
    transition: all 0.5s;
}
.open{
    margin-top:10px;
    transform: rotateZ(90deg);
}

#container1 {
    width: 1000px;
    margin: 0 auto;
    background: #fff;
    padding: 50px;
}

.main {
    background: #eee;
}

.content {
    margin: 20px auto;
    line-height: 50px;
}
.content p{
    text-indent: 2em;
}

.content:not(:first-child) p{
    display: none;
}