service/include/css/set.css
:root {
    --theme: #1890ff;
    --borderColor: #ccc;
}

*,
input[type=checkbox],
input[type=radio] {
    margin: 0;
    padding: 0;
}

.fl {
    float: left;
}

.fr {
    float: right;
}

.clearfix:after {
    content: "";
    display: block;
    height: 0;
    clear: both;
}

.container {
    padding: 10px;
}

/* tab切换 */
.tab-wrapper {
    position: relative;
    display: flex;
    margin-bottom: 10px;
    border-bottom: 1px solid var(--borderColor);
}

.tab-wrapper .line {
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 46px;
    height: 2px;
    margin-bottom: 0;
    background: var(--theme);
    transition: .5s;
}

.tab-wrapper .item {
    margin-bottom: 0;
    padding: 5px 10px;
    cursor: pointer;
}

.tab-wrapper .item.is-active {
    color: var(--theme);
}

/* 表单 */
.form-item {
    display: flex;
    margin-bottom: 10px;
    padding: 10px 0;
    border-bottom: 1px dashed var(--borderColor);
}

.form-item-group {
    border-bottom: 1px dashed var(--borderColor);
}

.form-item-group .form-item {
    border-bottom: 0;
}

.form-item-title {
    width: 150px;
    margin: 0 10px 0 0;
    text-align: right;
}

.form-item-content {
    flex: 1;
}

.form-item-content input {
    margin-right: 10px;
}

.content-item {
    display: none;
}

.content-item:first-of-type {
    display: block;
}

.input-inner {
    width: 500px;
}

.input-inner--textarea {
    width: 90%;
}

.friendship-link {
    width: 700px;
}

.preview-img {
    max-width: 200px;
}

.btn-submit {
    display: block;
    width: 200px;
    height: 40px;
    margin-top: 20px;
    border: 0;
    outline: 0;
    background: var(--theme);
    border-radius: 5px;
    color: #fff;
    cursor: pointer;
}

.btn {
    margin-left: 4px;
    padding: 4px 8px;
    position: relative;
    top: -3px;
    text-decoration: none;
    border: 1px solid #2271b1;
    border-radius: 2px;
    text-shadow: none;
    font-weight: 600;
    font-size: 13px;
    line-height: normal;
    color: #2271b1;
    background: #f6f7f7;
    cursor: pointer;
}