ant-design/site/component/Header/index.less

@header-height: 80px;

#header {
    animation: xRightMatrix .5s ease-out;
    transition: opacity 0.5S;

    background: #fff;
    border-bottom: 1px solid #eee;
    height: @header-height;
    margin-bottom: 24px;
    padding: 0 4%;
}

#logo {
    animation: xLeftMatrix .5s ease-out;
    transition: margin 0.3s cubic-bezier(0.075, 0.82, 0.165, 1) 0s, width 0.3s cubic-bezier(0.075, 0.82, 0.165, 1) 0s, height 0.3s cubic-bezier(0.075, 0.82, 0.165, 1) 0s;

    float: left;
    height: 60px;
    margin: 10px 45px 10px 0;
}
#logo img {
    height: 60px;
    width: 60px;
}
#logo span {
    color: #6EB4E0;
    float: right;
    font-size: 18px;
    font-family: "Hiragino Sans GB", "Microsoft YaHei", "微软雅黑", sans-serif;
    height: 60px;
    line-height: 60px;
    text-transform: uppercase;
}

#search-box {
    border-left: 1px solid #EBEDEE;
    float: left;
    height: 22px;
    padding-left: 30px;
    margin: 32px auto 0;
}
#search-box .ant-select {
    font-size: 14px;
    margin-top: -2px;
    width: 230px;
}

#search-box .ant-select-selection {
    border: 0;
    box-shadow: none;
}

#nav {
    border: 0;
    float: right;
    font-size: 14px;
}
#nav li {
    height: @header-height;
    line-height: @header-height;
    width: 86px;
    text-align: center;
}

.ant-component-decs {
    font-size: 12px;
    position: absolute;
    top: 9px;
    color: #aaa;
    right: 16px;
}