@charset "utf-8";
header {  
    width: 100%;
    max-width: 480px;
    display: flex;
    align-items: center;
    margin-bottom: 10px;
}  

.cf:before, .cf:after {  
    content: " ";  
    display: table;  
}  

.cf:after {  
    clear: both;  
}  

.cf {  
    zoom: 1;  
}  

#ci {  
    width: 120px;  
    height: 48px;  
    border: solid 1px #d9d9d9;  
    line-height: 0;  
    background: #fff;  
    margin: 0 1px 0 0;
}  

header nav {  
    flex: 1;
}  

header nav ul {  
    display: flex;  
    justify-content: space-between;  
    margin: 0;
    padding: 0;
    list-style: none;
}  

header nav ul li {  
    flex: 1;  /* 均等幅 */
    text-align: center;
    position: relative;
    background: #bc0073;  
}  

header nav ul li a {  
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 48px;
    font-weight: 300;  
    font-size: 0.8rem;  
    color: #fff;
    padding: 8px 0;  
    text-decoration: none;
}

header nav ul li:not(:last-child) {  
    border-right: 1px solid #fff;
}  

header nav ul li a span {  
    display: block;  
    font-size: 0.5rem;
}  

header nav ul li a:hover {
    text-decoration: underline;
    background: rgba(255, 255, 255, 0.2);
    z-index: 1;
}

header nav ul li .selected {
    background: #520032;
}