:root {
    --theme1: #0120ea;
    --theme2: #45fee8;
    --theme3: #369;
    --theme4: #036;
    --themeGradient1: linear-gradient(135deg, var(--theme2), var(--theme1));
    --themeGradient2: linear-gradient(135deg, var(--theme3), var(--theme4));
}

html,
body {
    color: #374151;
}

.themeColor {
    color: #135BE9 !important;
}

.themeBg {
    background: var(--theme1) !important;
    color: #fff !important;
}

.themeBd {
    background: transparent !important;
    border: 1px solid var(--theme1) !important;
    color: var(--theme1) !important;
}

.themeGradient1 {
    background: var(--themeGradient1) !important;
    color: #fff !important;
}

.themeGradient2 {
    background: var(--themeGradient2) !important;
    color: #fff !important;
}

img {
    max-height: 100%;
    max-width: 100%;
}

.qrcode_view {
    width: 160px;
    background: #fff;
    box-shadow: 0 0 2px #bbb;
    right: 2%;
    top: 100px;
    padding: 10px;
    font-size: 12px;
    border-radius: 10px;
}

.header {
    top: 0;
    z-index: 1;
    height: 80px;
    box-shadow: 0 2px 4px #e0e0e0;
}

.header .header_wrap {
    height: 80px;
}

.header .logo {
    display: inline-block;
    height: 50px;
}

.header .nav {
    height: 50px;
}

.header .nav .nav-item {
    color: #505050;
    text-decoration: none;
}

.header .nav .nav-item.active {
    color: var(--theme1);
}

.header .nav .nav-item::before {
    content: '';
    background: var(--themeGradient1);
    position: absolute;
    left: 0;
    bottom: -10px;
    width: 0;
    height: 4px;
    border-radius: 6px;
    transition: width .3s ease;
}

.header .nav .nav-item.active::before,
.header .nav .nav-item:hover::before {
    width: 100%;
}

.use_card {
    background: #fff;
    font-size: 14px;
    box-shadow: 0 0 10px #ccc;
    border-radius: 10px;
    top: 50px;
    width: 500px;
    left: 50%;
    transform: translateX(-50%);
    display: none;
}

.use_item {
    white-space: nowrap;
    color: #454545;
}

.use_item:hover {
    color: var(--theme1);
    background: #f9f9f9;
    border-radius: 10px;
    text-decoration: none;
}

.use_item .bi {
    font-size: 20px;
    transform: translateY(0px);
    transition: transform .3s ease-in-out;
}

.use_item:hover .bi {
    transform: translateY(-4px);

}

.header .btn_group a {
    position: relative;
    overflow: hidden;
    font-size: 12px;
    border-radius: 4px;
    border: none;
    transition: color .3s ease-in-out;
}

.header .btn_group a:hover {
    color: #fff;
}

.header .btn_group a::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 0;
    height: 100%;
    background: var(--themeGradient1);
    transition: all .3s ease-in-out;
    opacity: 0;
}

.header .btn_group a:hover::before {
    width: 100%;
    opacity: 1;
}

.header .btn_group a span {
    z-index: 1;
}

.footer_left .logo {
    width: 120px;
    float: left;
}

.footer_right {
    display: flex;
    justify-content: center;
}

.footer_right .title {
    margin-bottom: 10px;
}

.footer_right a {
    font-size: 12px;
    margin-bottom: 10px;
}

.copyright {
    background: #374151;
    height: 36px;
    font-size: 12px;
    line-height: 36px;
}

.copyright a {
    display: inline-block;
    color: inherit;
    line-height: 36px;
}

.pointer {
    cursor: pointer;
}

.start-use-btn {
    display: none;
    left: 50%;
    transform: translateX(-50%);
    bottom: 60px;
    width: 200px;
    background: var(--themeGradient1);
    color: #fff;
    text-align: center;
    height: 50px;
    line-height: 50px;
    z-index: 1;
    border-radius: 8px;
}

.start-use-btn:hover {
    color: #fff;
    text-decoration: none;
    opacity: 0.7;
}

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

.banner-tips {
    font-size: 16px;
    color: #8d99ae;
    max-width: 768px;
    margin: auto;
}

.start_btn {
    display: block;
    margin: 10px auto;
    width: 120px;
    height: 40px;
    text-align: center;
    line-height: 40px;
    border-radius: 4px;
    font-size: 16px;
    font-weight: bold;
    border-radius: 4px;
    overflow: hidden;
    transition: all .3s ease-in-out;
}

.start_btn:hover {
    text-decoration: none;
    color: #fff;
}

.start_btn::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 0;
    height: 100%;
    background: var(--themeGradient1);
    transition: all .3s ease-in-out;
    opacity: 0;
}

.start_btn:hover::before {
    width: 100%;
    opacity: 1;
}

.example {
    font-size: 14px;
    color: #505050;
}

.example video {
    width: 0;
    flex: 1;
    border-radius: 40px;
    box-shadow: 0 0 12px #ccc;
    display: block;
    margin-right: 20px;
}

.example .tips_text {
    max-width: 250px;
    line-height: 1.7;
}

.column_text {
    line-height: 1.7;
    flex: 1;
    width: 0;
}

.column_title {
    font-size: 32px;
    margin-bottom: 10px;
}

.column_image {
    width: 400px;
}

.column_video {
    width: 450px;
}

.column_video video {
    width: 100%;
    border-radius: 40px;
    box-shadow: 0 0 12px #ccc;
}