.header {
    height: 80px;
    line-height: 80px;
    padding: 0 100px;
    display: flex;
    justify-content: space-between;
    position: relative;
    border-bottom: 1px solid #efefef;
}

.header .logo {
    height: 100%;
    display: flex;
    align-items: center;
    font-size: 20px;
}

.header .logo img {
    width: 40px;
    height: 40px;
    margin-right: 10px;
}

.header .menu {
    width: 400px;
    position: absolute;
    left: -200px;
    top: 0;
    margin-left: 50%;
}

.menu ul {
    width: 100%;
    display: flex;
    justify-content: space-between;
}

.header .menu ul li {
    font-size: 16px;
}

.header .menu ul li a {
    padding: 6px 0;
    cursor: pointer;
}

.header .menu ul li a:hover {
    color: #ff9a02;
    border-bottom: 2px solid #ff9a02;
}

.header .more img {
    display: none;
}

.header .more img {
    width: 20px;
    height: 20px;
    margin-top: 30px;
}

.header .more img:last-child {
    display: none;
}

.phoneShow {
    width: 100%;
    position: absolute;
    top: 80px;
    left: 0;
    z-index: 99999;
    background-color: #ffffff;
    display: none;
}

.phoneShow ul {
    padding: 0 50px;
    display: flex;
    flex-direction: column;
}

.phoneShow ul li {
    width: 100%;
    padding: 0;
    line-height: 50px;
}

.tab {
    height: 80px;
    padding: 0 100px;
    background-color: #f0eded;
    line-height: 80px;
}

@media screen and (max-width: 500px) {
    .tab {
        height: 80px;
        padding: 0 20px;
        background-color: #f0eded;
        line-height: 80px;
    }
}
.tab ul li {
    margin-right: 40px;
    font-size: 18px;
}

.tab ul li a:hover {
    color: red;
}

.bannerBox {
    width: 100%;
}

.bannerBox img {
    width: 100%;
    height: 6rem;
    object-fit: cover;
}

.base_content {
    text-align: center;
    margin: 0 auto;
    padding: 0 100px 50px;
}

.base_content .base_title {
    font-size: 28px;
    display: inline-block;
    color: #666;
    margin: 30px auto;
    padding: 0 20px 10px;
    user-select: none;
    border-bottom: 2px solid #ff9a02;
}

.base_content .base_text {
    text-align: left;
}

.base_content .base_text .indent {
    text-indent: 2em;
    line-height: 2;
    margin: 1em;
}

.base_bottom {
    width: 100%;
    text-align: center;
    padding: 10px 0;
    background-color: #E5E5E5;
}

@media screen and (max-width: 850px) {
    .header {
        padding: 0 50px;
    }
    .base_content {
        padding: 0 50px 50px;
    }
    .header .more img:first-child {
        display: none;
    }
    .header .more img:last-child {
        display: none;
    }
    .phoneShow {
        display: none;
    }
}

@media screen and (max-width: 750px) {
    .header {
        padding: 0 20px;
    }
    .base_content {
        padding: 0 20px 30px;
    }
    .header .menu {
        display: none;
    }
    .header .more img:first-child {
        display: block;
    }
}

@media screen and (min-width: 750px) {
    .header .more {
        display: none;
    }
    #phoneShow {
        display: none;
    }
}