a { 
    text-decoration: none; /* 去除下划线 */ 
    color: inherit; /* 使用父元素的颜色 */ 
    cursor: pointer; /* 保持点击的手型光标 */
} 
a:hover, a:focus { 
    text-decoration: none; /* 可选：在悬停或聚焦时显示下划线 */ 
    color: inherit; /* 可选：保持悬停或聚焦时的颜色与父元素一致 */
}
header {
    width: 100%;
    height: 3.5rem;
    padding: 0.5rem 0.4rem 0 0;
    display: flex;
    flex-wrap: nowrap;
    position: relative;
}
.hidden {
    visibility: hidden;
}
header .logo-box {
    flex: 1;
    height:100%;
    background: #fff;
    display: flex !important;
    justify-content: center;
    align-items: center;
}
header .logo {
    width: 176px;
}

.topic-box {
    width: 50%;
    height:100%;
    background: #fff;
    flex: 1;
    display: flex !important;
    justify-content: space-around;
    padding: 0 1rem;
    list-style-type: none;
}
.topic-box .topic-item {
    width: 33%;
    display: flex !important;
    flex-direction: column;
    justify-content: center;
    padding: 0 0.4rem;
    flex: 1;
    position: relative;
}
.topic-box .topic-name {
    color: #000;
    font-size: 0.8rem;
    text-align: center;
    white-space: nowrap;
}
.topic-box .topic-bar {
    position: absolute;
    left: 0.4rem;
    right: 0.4rem;
    bottom: 0;
    background-color: #666;
    height: 3px;
}


.icon-box {
    min-width: 4rem;
    max-width: 5rem;
    height:100%;
    background: #fff;
    display: flex !important;
    justify-content: space-around;
    align-items: center;
}

.product_pop {
    position: absolute;
    background-color: rgba(255, 255, 255, 0.8);
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    padding: 1.2rem;
    display: flex !important;
}
.product_pop>li {
    margin-right: 2rem;
}
.product_pop .title {
    font-size: 0.45rem;
    font-weight: 500;
    white-space: nowrap;
    margin-bottom: 0.8rem;
}
.product_pop .title:hover {
    color: #FFB6C1;
}
.product_pop .list {
    font-size: 0.45rem;
    display: flex !important;
    flex-direction: column;
    justify-content: center;
}
.product_pop .item {
    padding: 0.1rem 0;
    white-space: nowrap;
}
.product_pop .item .txt:hover {
    color: blue;
}
@media screen and (max-width: 640px) {
    header .logo {
        width: 63px;
    }
    .product_pop>li {
        margin-right: 1rem;
    }
}
@media screen and (max-width: 375px) {
    .product_pop {
        padding-right: 0.5rem;
    }
    .product_pop>li {
        margin-right: 0.4rem;
    }
}