search.css

.search {
    position: relative;
    margin-top: 1em;
    margin-bottom: 1em;
    padding: 5px;
    padding-left: 0;
    border-radius: 4px;
    -webkit-border-radius: 4px;
    font-size: 0.9375rem;
    background: none;
    display: block;
    line-height: 1.6;
}
/* 
.search[type=baidu] {
    border-left: 4px solid #09aaff;
}

.search[type=baidu]::before {
    color: #09aaff;
}

.search[type=google] {
    border-left: 4px solid #29ff78;
}

.search[type=google]::before {
    color: #29ff78;
}

.search[type=sogou] {
    border-left: 4px solid #f87dff;
}

.search[type=sogou]::before {
    color: #f87dff;
}

.search[type=S360] {
    border-left: 4px solid #007c32;
}

.search[type=S360]::before {
    color: #007c32;
}

.search[type=bing] {
    border-left: 4px solid #fcb523;
}

.search[type=bing]::before {
    color: #fcb523;
}

.search[type=github] {
    border-left: 4px solid black;
}

.search[type=github]::before {
    color: black;
}

.search[type=yandex] {
    border-left: 4px solid rgb(255, 32, 99);
}

.search[type=yandex]::before {
    color: rgb(255, 32, 99);
} */

.search::before {
    position: absolute;
    top: calc(50% - 24px * 0.5);
    left: 4px;
    width: 24px;
    height: 24px;
    text-align: center;
    font-weight: 600;
    line-height: 24px;
    vertical-align: middle;
}