/* basic config */
html, body {
    font-family:PingFang, NotoSansHans-Regular, AvenirNext-Regular, proxima-nova, "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Open Sans", "Helvetica Neue", Arial, sans-serif;
    font-size: 14px;
    height: 100%;
}

body {
    color: #494a4a;
    background: #FFF;
}

/* font size settings */
.font-12 {
    font-size: 12px;
}
.font-14 {
    font-size: 14px;
}

.font-16 {
    font-size: 16px;
}

.font-20 {
    font-size: 20px;
}

.font-24 {
    font-size: 24px;
}

.font-26 {
    font-size: 26px;
}

.font-28 {
    font-size: 28px;
}

.font-30 {
    font-size: 30px;
}

.font-32 {
    font-size: 32px;
}

.font-36 {
    font-size: 36px;
}

.font-50 {
    font-size: 3.571rem;
}
/* text color settings */
.text-main {
    color: #3790FF;
}

.text-contrast {
    color: #FFF;
}

.text-dark {
    color: #494a4a;
}

/* background filled settings */
.image-filled {
    background-color: #FFF;
    background-position: center;
    background-size: cover;
}

.color-filled-white {
    background-color: #FFF;
}

.color-filled-grey {
    background-color: #F5F5F5;
}

.color-filled-darkgrey {
    background-color: #2B2B2B;
}

.color-filled-grident-grey {
    background: linear-gradient(90deg, #F4F4F4, #E7EAF1);
}
/* links */
a {
    color: #494a4a;
}

a:hover {
    color: #3790FF;
}

/* transition animations */
.with-transition {
    transition: all 200ms ease-out 0s;
}

.hidden {
    display: none !important;
}


/* backgrund image icon */
i.img {
    display: inline-block;
    font-style: normal;
    font-variant: normal;
    text-rendering: auto;
    line-height: 1;
    width: 1em;
    height: 1em;
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
    margin: 0%;
}

i.img.half-size {
    width: 0.6em;
    height: 0.6em;
    margin: 20%;
}

i.img-zhihu {
    font-size: 2rem;
    background-image: url(/static/images/zhihu_gray.png);
}

li:hover i.img-zhihu {
    background-image: url(/static/images/zhihu_white.png);
}

i.img-chrome {
    background-image: url(/static/image/icon_chrome.png);
}

i.img-firefox {
    background-image: url(/static/image/icon_firefox.png);
}

i.img-safari {
    background-image: url(/static/image/icon_safari.png);
}

i.img-opera {
    background-image: url(/static/image/icon_opera.png);
}

i.img-ie {
    background-image: url(/static/image/icon_ie.png);
}

i.img-android {
    background-image: url(/static/image/icon_android.png);
}

i.img-apple {
    background-image: url(/static/image/icon_apple.png);
}

/* margin-left */
.ml-10 {
    margin-left: 10px;
}
.ml-20 {
    margin-left: 20px;
}
.ml-30 {
    margin-left: 30px;
}
.ml-40 {
    margin-left: 40px;
}
.ml-50 {
    margin-left: 50px;
}

.flexRow{
    display: flex;
    flex-flow: row nowrap;
    justify-content: flex-start;
    align-items: flex-start;
}

.flexRowCenter{
    display: flex;
    flex-flow: row nowrap;
    justify-content: center;
    align-items: center;
}

.flexRowAroundCenter {
    display: flex;
    flex-flow: row nowrap;
    justify-content: space-around;
    align-items: center;
}

.flexColumn{
    display: flex;
    flex-flow: column wrap;
    justify-content: flex-start;
    align-items: flex-start;
}

.flexColumnCenter{
    display: flex;
    flex-flow: column wrap;
    justify-content: center;
    align-items: center;
}