html, body, h1, h2, h3, h4, h5, p, ul, ol, li, dl, dt, dd, div, span, em, strong, table, thead, tbody, th, td, th, a, form, input, select, textarea {
    padding: 0px;
    margin: 0px;
    list-style: none;
    font-style: normal;

}
html, body, input, textarea {
    max-width: 800px;
    margin: 0px auto;
    font-family: "苹方", "Droid Sans Fallback", "微软雅黑", Tahoma, Geneva, sans-serif, "宋体";
}
html, body{
    box-sizing: border-box;
    min-height: 100%;
}
body {
    font-size: 14px;
    color: rgba(0, 0, 0, 0.8);
    line-height: 1.5;
    -webkit-text-size-adjust: 100% !important;
    background: #f5f5f5;
    padding-top: 44px;
    padding-bottom: 48px;
    padding-bottom: calc(48px + constant(safe-area-inset-bottom));
    padding-bottom: calc(48px + env(safe-area-inset-bottom));
    min-height: 100vh;
}
a {
    color: rgba(0, 0, 0, 0.8);
    text-decoration: none;
}

a:hover {
    color: rgba(0, 0, 0, 0.8);
    text-decoration: none;
}

table {
    border-collapse: collapse;
    width: 100%;
}

img {
    border: 0px;
    vertical-align: top;
}

input {
    vertical-align: middle;
    font-size: 12px;
    color: #333333;
    background: transparent;
    outline: none;
}

textarea {
    color: #333333;
    font-size: 12px;
    background: transparent;
    outline: none;
}

select {
    color: #333333;
    font-size: 12px;
    vertical-align: middle;
    padding: 1px;
}

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

.bot-tab-nav {
    position: fixed;
    left: 0px;
    right: 0px;
    bottom: 0px;
    background: #ffffff;
    text-align: center;
    z-index: 1000;
    padding-bottom: constant(safe-area-inset-bottom);
    padding-bottom: env(safe-area-inset-bottom);
    height: 50px;
    display: flex;
    align-items: center;
}

.bot-tab-nav::before {
    content: "";
    display: block;
    position: absolute;
    top: 0px;
    left: 0px;
    right: 0px;
    border-top: 1px solid #e5e5e5;
    transform: scaleY(0.5);
    -webkit-transform: scaleY(0.5);
}

.bot-tab-nav .tab-item {
    flex: 1;
}

.bot-tab-nav .tab-item-inner {
    display: block;
    padding: 7px 0px 5px 0px;
}

.bot-tab-nav .tab-ico {
    display: block;
    height: 20px;
    background: center center no-repeat;
    background-size: auto 100%;
    margin-bottom: 4px;
}

.bot-tab-nav .tab-title {
    line-height: 14px;
    font-size: 12px;
    color: #666666;
    display: block;
}

.bot-tab-nav .tab-home .tab-ico {
    background-image: url(/images/tabIcons/home-normal@3x.png);
}

.bot-tab-nav .tab-category .tab-ico {
    background-image: url(/images/tabIcons/class-normal@3x.png);
}

.bot-tab-nav .tab-discovery .tab-ico {
    background-image: url(/images/tabIcons/discover-normal@3x.png);
}

.bot-tab-nav .tab-my .tab-ico {
    background-image: url(/images/tabIcons/i-normal@3x.png);
}

.bot-tab-nav .tab-yiduiyi .tab-ico {
    background-image: url(/images/tabIcons/yiduiyi-normal@3x.png);
}

.bot-tab-nav .tab-video .tab-ico {
    background-image: url(/images/tabIcons/videocourse-normal@3x.png);
}

.bot-tab-nav .tab-jingxuan .tab-ico {
    background-image: url(/images/tabIcons/jingxuan-normal@3x.png);
}

.bot-tab-nav .tab-aiplat .tab-ico {
    background-image: url(/images/tabIcons/ai-plat-normal@3x.png);
}


.bot-tab-nav .selected .tab-home .tab-ico {
    background-image: url(/images/tabIcons/home-active@3x.png);
}

.bot-tab-nav .selected .tab-category .tab-ico {
    background-image: url(/images/tabIcons/class-active@3x.png);
}

.bot-tab-nav .selected .tab-discovery .tab-ico {
    background-image: url(/images/tabIcons/discover-active@3x.png);
}

.bot-tab-nav .selected .tab-my .tab-ico {
    background-image: url(/images/tabIcons/i-active@3x.png);
}

.bot-tab-nav .selected .tab-yiduiyi .tab-ico {
    background-image: url(/images/tabIcons/yiduiyi-active@3x.png);
}

.bot-tab-nav .selected .tab-video .tab-ico {
    background-image: url(/images/tabIcons/videocourse-active@3x.png);
}

.bot-tab-nav .selected .tab-jingxuan .tab-ico {
    background-image: url(/images/tabIcons/jingxuan-active@3x.png);
}

.bot-tab-nav .selected .tab-aiplat .tab-ico {
    background-image: url(/images/tabIcons/ai-plat-active@3x.png);
}
.bot-tab-nav .selected .tab-aiplat .tab-title{
    color: #4b54f5;
}
.bot-tab-nav .tab-aiplat .tab-title {
    color: #4b54f5;
}

.bot-tab-nav .selected .tab-title {
    color: #e53737;
}

.top-bar {
    position: fixed;
    left: 0px;
    right: 0px;
    background: #ffffff center center no-repeat;
    background-size: cover;
    top: 0px;
    height: 44px;
    z-index: 1000;
    line-height: 44px;
    padding: 0px 90px;
}

.top-bar::after {
    content: "";
    display: block;
    position: absolute;
    bottom: 0px;
    left: 0px;
    right: 0px;
    border-top: 1px solid #e53737;
    transform: scaleY(0.5);
    -webkit-transform: scaleY(0.5);
}

.top-bar .left-btns {
    position: absolute;
    left: 0px;
    top: 0px;
}

.top-bar .left-btns .btn-back {
    width: 44px;
    height: 44px;
    background: url(/images/Mobile_bg0379.png) center center no-repeat;
    background-size: 28px 28px;
    text-indent: -99999em;
    overflow: hidden;
    display: block;
}

.top-bar .right-btns {
    position: absolute;
    right: 0px;
    top: 0px;
}

.top-bar .right-btns .btn-search {
    width: 44px;
    height: 44px;
    background: url(/images/Mobile_bg0321.png) center center no-repeat;
    background-size: 18px 18px;
    text-indent: -99999em;
    overflow: hidden;
    display: block;
}

.top-bar .top-title {
    text-align: center;
    white-space: nowrap;
    text-overflow: ellipsis;
    font-size: 17px;
    overflow: hidden;
}

.search-entry{
    display: none;
    padding: 10px 16px;
    align-items: center;
}
.search-entry .search-entry-holder{
    display: flex;
    background: #ffffff url(/images/Mobile_bg0333.png) 10px center no-repeat;
    background-size: 12px 12px;
    border-radius: 100px;
    line-height: 30px;
    padding-left: 30px;
    color: rgba(0, 0, 0, 0.6);
    flex: 1;
}
.search-entry .btn-coupon{
    background: url(/images/ico_coupon.png) center center no-repeat;
    background-size: 20px 20px;
    width: 44px;
    height: 30px;
    float: left;
    text-indent: -9999em;
    overflow: hidden;
}
.search-entry .btn-category{
    line-height: 30px;
    display: block;
    font-size: 15px;
}
.shengcaidianzishu .search-entry{
    display: flex;
}


/* 通用视频播放器相关 */

.sc-player.prism-player .prism-big-play-btn {
    background: rgba(0, 0, 0, 0.5);
    border: 2px solid rgba(255, 255, 255, 0.75);
    border-radius: 100%;
}

.sc-player.prism-player .prism-big-play-btn::before {
    content: "";
    display: block;
    position: absolute;
    left: 50%;
    top: 50%;
    border-left: 17px solid #ffffff;
    border-top: 10px solid transparent;
    border-bottom: 10px solid transparent;
    margin-left: -6px;
    margin-top: -10px;
}

.sc-player.prism-player .prism-big-play-btn .outter {
    opacity: 0;
}

.sc-player.prism-player .prism-info-display {
    box-sizing: border-box;
}

.sc-player.prism-player .prism-liveshift-progress .prism-progress-played, 
.sc-player.prism-player .prism-progress .prism-progress-played {
    background: #ff3e3e;
}
.sc-player.prism-player .prism-controlbar .prism-controlbar-bg {
    background: -webkit-linear-gradient(rgba(0, 0, 0, 0), rgba(0, 0, 0, 1));
    background: linear-gradient(rgba(0, 0, 0, 0), rgba(0, 0, 0, 1));
}

.sc-player.prism-player .prism-progress-cursor{
    background: #ff3e3e;
    border-radius: 100px;
    opacity: 1;
    box-sizing: border-box;
    outline: 3px solid rgba(255, 255, 255, 0.5);
}
.sc-player.prism-player .prism-progress-cursor img{
    opacity: 0;
}
.sc-player .player-olympic-player-next {
	width: 24px;
	height: 24px;
	margin-top: 12px;
	background: url(https://g.100xuexi.com/CssModel/commonJs/aliplayer/smallplaynext.png) center no-repeat;
	background-size: contain;
}

.sc-player .player-olympic-player-next.disabled {
	opacity: 0.3;
	cursor: not-allowed;
}

.sc-player .prism-controlbar-switch {
	float: right;
	position: relative;
	overflow: hidden;
	vertical-align: middle;
	cursor: pointer;
	display: flex;
	align-items: center;
	height: 24px;
	margin-top: 12px;
	margin-right: 12px;
}

.sc-player .prism-controlbar-switch input {
	position: absolute;
	width: 0;
	height: 0;
	opacity: 0;
	overflow: hidden;
}

.sc-player .prism-controlbar-switch .prism-controlbar-switch-icon {
	display: block;
	position: relative;
	width: 42px;
	height: 22px;
	background-color: rgba(255, 255, 255, 0.1);
	border: 0;
	padding: 2px;
	outline: 0;
	border-radius: 16px;
	box-sizing: border-box;
	-webkit-transition: background-color 0.1s, border 0.1s;
	transition: background-color 0.1s, border 0.1s;
	margin-right: 5px;
}

.sc-player .prism-controlbar-switch .prism-controlbar-switch-icon:after {
	content: " ";
	position: absolute;
	top: 2px;
	left: 2px;
	width: 18px;
	height: 18px;
	border-radius: 15px;
	background-color: #fff;
	box-shadow: 0 2px 3px 0 rgba(0, 0, 0, 0.06);
	-webkit-transition: -webkit-transform 0.35s cubic-bezier(0.4, 0.4, 0.25, 1.35);
	transition: transform 0.35s cubic-bezier(0.4, 0.4, 0.25, 1.35);
	transition: transform 0.35s cubic-bezier(0.4, 0.4, 0.25, 1.35), -webkit-transform 0.35s cubic-bezier(0.4, 0.4, 0.25, 1.35);
}

.sc-player .prism-controlbar-switch input:checked+.prism-controlbar-switch-icon {
	background-color: #e53737;
}

.sc-player .prism-controlbar-switch input:checked+.prism-controlbar-switch-icon::after {
	-webkit-transform: translateX(20px);
	transform: translateX(20px);
}
.sc-player .prism-controlbar-switch .prism-controlbar-switch-text{
    color: #ffffff;
}
.end-tips {
    padding: 16px 0px 32px 0px;
}

.end-tips:before {
    content: "";
    display: block;
    background: url(/images/Mobile_bg0597.png) center center no-repeat;
    background-size: auto 30px;
    height: 30px;
}


.dialog-mask {
    position: fixed;
    left: 0px;
    top: 0px;
    right: 0px;
    bottom: 0px;
    background: rgba(0, 0, 0, 0.75);
    z-index: 1500;
    display: none;
}

.bot-dialog {
    position: fixed;
    left: 0px;
    right: 0px;
    bottom: 0px;
    height: 80%;
    border-radius: 12px 12px 0px 0px;
    background: rgba(0, 0, 0, 0.75);
    z-index: 1500;
    background: #ffffff;
    display: none;
}

.bot-dialog .dialog-title {
    height: 44px;
    line-height: 44px;
    text-align: center;
    position: absolute;
    top: 0px;
    left: 0px;
    right: 0px;
}

.bot-dialog .dialog-title .title-text {
    font-size: 17px;
    text-align: center;
}

.bot-dialog .dialog-content {
    position: absolute;
    left: 0px;
    right: 0px;
    top: 44px;
    bottom: calc(56px + constant(safe-area-inset-bottom));
    bottom: calc(56px + env(safe-area-inset-bottom));
    overflow: auto;
    word-wrap: break-word;
}

.bot-dialog .dialog-foot {
    position: absolute;
    height: 56px;
    text-align: center;
    left: 0px;
    right: 0px;
    bottom: 0px;
    padding-bottom: constant(safe-area-inset-bottom);
    padding-bottom: env(safe-area-inset-bottom);
}

.bot-dialog .dialog-foot:after {
    content: "";
    display: block;
    position: absolute;
    top: 0px;
    left: 0px;
    right: 0px;
    height: 1px;
    background: rgba(0, 0, 0, 0.1);
    transform: scaleY(0.5);
    -webkit-transform: scaleY(0.5);
}

.bot-dialog .dialog-foot .btn-container {
    display: flex;
    display: -webkit-flex;
    flex-direction: row;
    justify-content: center;
    align-items: stretch;
}

.bot-dialog .dialog-foot .btn-container .btn-item {
    flex: 1;
    position: relative;
}

.bot-dialog .dialog-foot .btn-container .btn-item::after {
    content: "";
    display: block;
    position: absolute;
    top: 0px;
    bottom: 0px;
    right: 0px;
    width: 1px;
    background: rgba(0, 0, 0, 0.1);
    transform: scaleX(0.5);
    -webkit-transform: scaleX(0.5);
}

.bot-dialog .dialog-foot .btn-container .btn-item:last-child:after {
    display: none;
}

.bot-dialog .dialog-foot .btn-container .btn-item .btn {
    display: block;
    line-height: 56px;
    font-size: 17px;
}

.com-dialog {
    position: fixed;
    left: 50%;
    top: 50%;
    width: 80%;
    max-width: 320px;
    transform: translate(-50%, -50%);
    -webkit-transform: translate(-50%, -50%);
    border-radius: 12px 12px;
    background: rgba(0, 0, 0, 0.75);
    z-index: 1500;
    background: #ffffff;
    display: none;
    padding: 44px 0px 56px 0px;
}

.com-dialog .dialog-title {
    height: 44px;
    line-height: 44px;
    text-align: center;
    position: absolute;
    top: 0px;
    left: 0px;
    right: 0px;
}

.com-dialog .dialog-title .title-text {
    font-size: 17px;
    text-align: center;
}

.com-dialog .dialog-content {
    overflow: auto;
    word-wrap: break-word;
}

.com-dialog .dialog-foot {
    position: absolute;
    height: 56px;
    text-align: center;
    left: 0px;
    right: 0px;
    bottom: 0px;
    padding-bottom: constant(safe-area-inset-bottom);
    padding-bottom: env(safe-area-inset-bottom);
}

.com-dialog .dialog-foot:after {
    content: "";
    display: block;
    position: absolute;
    top: 0px;
    left: 0px;
    right: 0px;
    height: 1px;
    background: rgba(0, 0, 0, 0.1);
    transform: scaleY(0.5);
    -webkit-transform: scaleY(0.5);
}

.com-dialog .dialog-foot .btn-container {
    display: flex;
    display: -webkit-flex;
    flex-direction: row;
    justify-content: center;
    align-items: stretch;
}

.com-dialog .dialog-foot .btn-container .btn-item {
    flex: 1;
    position: relative;
}

.com-dialog .dialog-foot .btn-container .btn-item::after {
    content: "";
    display: block;
    position: absolute;
    top: 0px;
    bottom: 0px;
    right: 0px;
    width: 1px;
    background: rgba(0, 0, 0, 0.1);
    transform: scaleX(0.5);
    -webkit-transform: scaleX(0.5);
}

.com-dialog .dialog-foot .btn-container .btn-item:last-child:after {
    display: none;
}

.com-dialog .dialog-foot .btn-container .btn-item .btn {
    display: block;
    line-height: 56px;
    font-size: 17px;
}


.msg-box-mask {
    position: fixed;
    left: 0px;
    right: 0px;
    top: 0px;
    bottom: 0px;
    z-index: 99998;
    background: rgba(0, 0, 0, 0.75);
}

.msg-box {
    position: fixed;
    left: 50%;
    top: 50%;
    background: #ffffff;
    width: 80%;
    max-width: 320px;
    border-radius: 12px;
    transform: translate(-50%, -50%);
    -webkit-transform: translate(-50%, -50%);
    overflow: hidden;
    z-index: 99999;
}
.msg-box .msg-title {
    text-align: center;
    padding: 32px 24px 16px;
    font-size: 17px;
    font-weight: bold;
}

.msg-box .msg-con {
    padding: 0px 24px 32px 24px;
    text-align: center;
    font-size: 17px;
    word-wrap: break-word;
}

.msg-box .msg-foot {
    height: 56px;
    line-height: 56px;
    text-align: center;
    box-sizing: border-box;
    position: relative;
}

.msg-box .msg-foot:after {
    content: "";
    position: absolute;
    right: 0px;
    left: 0px;
    top: 0px;
    height: 1px;
    background: rgba(0, 0, 0, 0.1);
    transform: scaleY(0.5);
    -webkit-transform: scaleY(0.5);
}

.msg-box .msg-foot .aler-btns {
    width: 100%;
    overflow: hidden;
    zoom: 1;
}

.msg-box .msg-foot .confirm-btns {
    width: 100%;
    overflow: hidden;
    zoom: 1;
    font-weight: bold;
}

.msg-box .msg-foot .confirm-btns li {
    width: 50%;
    float: left;
    position: relative;
}

.msg-box .msg-foot .confirm-btns li:after {
    content: "";
    position: absolute;
    right: 0px;
    top: 0px;
    bottom: 0px;
    width: 1px;
    background: rgba(0, 0, 0, 0.1);
    transform: scaleX(0.5);
    -webkit-transform: scaleX(0.5);
}

.msg-box .msg-foot .confirm-btns li:last-child::after {
    display: none;
}

.msg-box .msg-foot .btn-no {
    display: block;
    font-size: 17px;
    font-weight: bold;
}

.msg-box .msg-foot .btn-ok {
    display: block;
    font-size: 17px;
    color: #e53737;
    font-weight: bold;
}
.confirm-maker-agreement{
    width: 80%;
    max-width: 600px;
}
.confirm-maker-agreement .iframe-agreement{
    border: none;
    width: 100%;
    height: 200px;
}
.confirm-maker-agreement .msg-con{
    padding: 0px;
}
.download-app-tips {
    background: rgba(0, 0, 0, .7);
    height: 50px;
    color: #c30;
    position: fixed;
    left: 0;
    right: 0;
    top: 0px;
    width: 100%;
    box-sizing: border-box;
    z-index: 5000;
    padding-right: 44px
}

.download-app-tips .btn-close {
    position: absolute;
    width: 44px;
    height: 50px;
    right: 0;
    top: 0;
    background: url(../images/Mobile_bg0039_1.png) center center no-repeat;
    background-size: 20px 20px
}

.download-app-tips a {
    display: block
}

.download-app-tips .app-ico {
    float: left;
    width: 2pc;
    height: 2pc;
    padding: 8px
}

.download-app-tips .app-ico img {
    width: 2pc;
    height: 2pc;
    vertical-align: top
}

.download-app-tips .text {
    color: #c30;
    color: #fff;
    line-height: 2pc;
    font-size: 14px;
    margin: 0 60px 0 47px;
    padding: 8px 0;
    display: block
}

.download-app-tips .text .h {
    font-size: 1pc;
    display: block
}

.download-app-tips .text .des {
    font-size: 14px;
    display: block
}

.download-app-tips .text .des-short {
    font-size: 14px;
    display: none
}

.download-app-tips .btn-download-container {
    float: right;
    height: 50px;
    overflow: hidden;
    zoom: 1
}

.download-app-tips .btn-download {
    background: #e4393c;
    color: #fff;
    border-bottom: 1px solid #c00;
    float: left;
    line-height: 28px;
    height: 28px;
    padding: 0 5px;
    border-radius: 4px;
    margin: 10px 0 0
}

@media screen and (max-width:400px) {
    .download-app-tips .text .des {
        display: none
    }

    .download-app-tips .text .des-short {
        display: block
    }
}

@media screen and (max-width:320px) {
    .download-app-tips .text .des-short {
        font-size: 9pt
    }
}

.btn-kefu {
    background: url(/images/Mobile_bg0643.png);
    background-size: auto 105px;
    background-repeat: no-repeat;
    position: fixed;
    bottom: 15%;
    right: 0px;
    z-index: 1000;
    width: 35px;
    height: 105px;
    animation: amt-kefu-ico 1s steps(2) infinite normal;
    -webkit-animation: amt-kefu-ico 1s steps(2) infinite normal;
}

@keyframes amt-kefu-ico {
    0% {
        background-position: 0 0;
        opacity: 1;
    }

    100% {
        background-position: -70px 0;
        opacity: 1;
    }
}

@-webkit-keyframes Amt-NewYearsDog-Body {
    0% {
        background-position: 0 0;
        opacity: 1;
    }

    100% {
        background-position: -70px 0;
        opacity: 1;
    }
}

.modal-loading {
    position: fixed;
    left: 0px;
    top: 0px;
    right: 0px;
    bottom: 0;
    z-index: 1000;
    background: rgba(0, 0, 0, 0.5);
}

.modal-loading .modal-loading-box {
    background: rgba(0, 0, 0, 0.8);
    border-radius: 8px;
    text-align: center;
    width: 100px;
    padding: 20px;
    position: fixed;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    -webkit-transform: translate(-50%, -50%);
    color: #ffffff;
}

.modal-loading .modal-loading-box::before {
    content: "";
    display: block;
    width: 40px;
    height: 40px;
    background: url(/images/loading_white.gif) center center no-repeat;
    margin: 0px auto 10px auto;
    background-size: 100% auto;

}




.toast-mask {
    position: fixed;
    left: 0px;
    right: 0px;
    top: 0px;
    bottom: 0px;
    z-index: 5000;
    background: rgba(0, 0, 0, 0.75);
}

.toast-box {
    background: rgba(0, 0, 0, 0.9);
    border-radius: 12px;
    position: fixed;
    padding: 20px 10px;
    color: #ffffff;
    position: fixed;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    -webkit-transform: translate(-50%, -50%);
    z-index: 5005;
    width: 120px;
    box-sizing: border-box;
}

.toast-box .toast-icon {
    width: 40px;
    height: 40px;
    margin: 0px auto;
    background: center center no-repeat;
    background-size: contain;
}

.toast-box .toast-icon.success {
    background-image: url(https://wx.100xuexi.com/images/Tk_Mobile_bg0014_0.png);
}

.toast-box .toast-icon.fail {
    background-image: url(https://wx.100xuexi.com/images/Mobile_bg0071.png);
}

.toast-box .toast-text {
    display: block;
    text-align: center;
    padding-top: 5px;
}


/* .AIEbookSkin{
    background-position: center 10px;
    background-size: 85% auto;
} */
.AIEbookSkin:after{
    content: "";
    display: block;
    position: absolute;
    top: 0px;
    right: 0px;
    bottom: 0px;
    left: 0px;
    background: url(/images/bgimg/AIEbookSkin.png?v=20250521) center center no-repeat;
    background-size: 100% 100%;
    border: none !important;
    z-index: 100;
    box-shadow: 0px 0px 0px 1px rgba(0, 0, 0, 0.1) inset;
}
/* .AITkSkin{
    background-position: center 10px;
    background-size: 85% auto;
} */
.AITkSkin:after{
    content: "";
    display: block;
    position: absolute;
    top: 0px;
    right: 0px;
    bottom: 0px;
    left: 0px;
    background: url(/images/bgimg/AITkSkin.png?v=20250521) center center no-repeat;
    background-size: 100% 100%;
    border: none !important;
    z-index: 100;
    box-shadow: 0px 0px 0px 1px rgba(0, 0, 0, 0.1) inset;
}
/* .AIVideoSkin{
    background-position: center 10px;
    background-size: 85% auto;
} */
.AIVideoSkin:after{
    content: "";
    display: block;
    position: absolute;
    top: 0px;
    right: 0px;
    bottom: 0px;
    left: 0px;
    background: url(/images/bgimg/AIVideoSkin.png?v=20250521) center center no-repeat;
    background-size: 100% 100%;
    border: none !important;
    z-index: 100;
    box-shadow: 0px 0px 0px 1px rgba(0, 0, 0, 0.1) inset;
}
.AIVideoCourseSkin:after{
    content: "";
    display: block;
    position: absolute;
    top: 0px;
    right: 0px;
    bottom: 0px;
    left: 0px;
    background: url(/images/bgimg/AIVideoCourseSkin.png?v=20250521) center center no-repeat;
    background-size: 100% 100%;
    border: none !important;
    z-index: 100;
    box-shadow: 0px 0px 0px 1px rgba(0, 0, 0, 0.1) inset;
}


.placeholder-text {
    display:block;
    height: 1em;
    margin: 0.25em 0px;
    background: rgba(0, 0, 0, 0.1);
}

.placeholder-img {
    display: block;
    background: rgba(0, 0, 0, 0.1);
}


.study-model{
    position: fixed;
    left: 0px;
    top: 0px;
    right: 0px;
    bottom: 0px;
    z-index: 1000;
    display: none;
}
.study-model .study-model-mask{
    position: absolute;
    left: 0px;
    top: 0px;
    right: 0px;
    bottom: 0px;
    background: rgba(0, 0, 0, 0.5);
}
.study-model .study-model-box{
    position: absolute;
    left: 50%;
    top: 50%;
    max-width: 360px;
    width: 80%;
    transform: translate(-50%, -50%);
    background: #ffffff;
    border-radius: 12px;
}
.study-model .study-model-box .btn-close{
    width: 40px;
    height: 40px;
    background: url(/images/Mobile_bg0627.png) center center no-repeat;
    background-size: 20px 20px;
    position: absolute;
    right: 12px;
    top: 12px;
}
.study-model .study-model-box .box-title{
    padding: 20px 16px 0px 16px;
    font-size: 17px;
    text-align: center;
}
.study-model .study-model-box .box-content{
    padding: 15px 20px;
}
.study-model .study-model-box .model-item{
    padding: 10px 0px;
}

.study-model .study-model-box .model-item .item-inner{
    display: flex;
    border-radius: 12px;
    background: #f5f5f5;
    align-items: center;
    padding: 10px 0px;
}
.study-model .study-model-box .model-item.selected .item-inner{
    background: #ffe3e3;
    position: relative;
    outline: 2px solid #e53737;
}
.study-model .study-model-box .model-item  .item-icon{
    width: 48px;
    height: 48px;
    flex-shrink: 0;
    margin: 0px 10px 0px 16px;
    background: #ffffff center center no-repeat;
    background-size: contain;
    border-radius: 100px;
    box-shadow: 0px 0px 0px 1px rgba(0, 0, 0, 0.1);
}
.study-model .study-model-box .model-item .item-icon-k12{
    background-image: url(/images/user_model_1.png);
}
.study-model .study-model-box .model-item .item-icon-adult{
    background-image: url(/images/user_model_2.png);
}
.study-model .study-model-box .model-item .item-des {
    flex: 1;
}
.study-model .study-model-box .model-item .item-title {
    font-size: 16px;
}
.study-model .study-model-box .model-item .item-sub-title{
    font-size: 14px;
    color: rgba(0, 0, 0, 0.5);
    margin-top: 4px;
}

@media (prefers-color-scheme:dark) {
    html{
        background: #000000;
    }
    body {
        background: #000000;
        color: #cccccc;
    }
    body::before{
        content: "";
        position: fixed;
        left: 0px;
        top: 0px;
        right: 0px;
        background: #000000;
        height: 100%;
        z-index: -1;
    }
    a, a:hover {
        color: #cccccc;
    }

    input {
        color: #cccccc;
    }

    textarea {
        color: #cccccc;
    }

    select {
        color: #cccccc;
    }

    select option {
        background: #000000;
    }

    .top-bar {
        background-color: #1a1a1a;
    }

    .top-bar .left-btns .btn-back {
        background-image: url(/images/Mobile_bg0379_1.png);
    }

    .search-entry-holder{
        display: block;
        background-color: rgba(255,255,255,0.1);
        color: rgba(255, 255, 255, 0.5);
    }
    
    
    .bot-tab-nav::before {
        border-top: 1px solid rgba(255, 255, 255, 0.1);
    }

    .bot-tab-nav {
        background: #1a1a1a;
    }

    .bot-tab-nav .tab-title {
        color: #cccccc;
    }

    .end-tips:before {
        opacity: 0.5;
    }

    .top-bar .right-btns .btn-search {
        background-image: url(/images/Mobile_bg0321_0.png);
    }

    .com-dialog {
        background: #1a1a1a;
        border: 1px solid rgba(255, 255, 255, 0.1);
    }

    .com-dialog .dialog-foot:after {
        background: rgba(255, 255, 255, 0.1);
    }

    .com-dialog .dialog-foot .btn-container .btn-item::after {
        background: rgba(255, 255, 255, 0.1);
    }

    .msg-box{
        background: #1a1a1a;
        border: 1px solid rgba(255, 255, 255, 0.1);
    }
    .msg-box .msg-foot:after{
        background: rgba(255, 255, 255, 0.1);
    }
    .msg-box .msg-foot .confirm-btns li:after {
        background: rgba(255, 255, 255, 0.1);
    }
    .bot-dialog{
        background: #1a1a1a;
        border-top: 1px solid rgba(255, 255, 255, 0.2);
    }
    .placeholder-text {
        background: rgba(255, 255, 255, 0.1);
    }

    .placeholder-img {
        background-color: rgba(255, 255, 255, 0.1);
    }
    .search-entry .search-entry-holder{
        background-color: rgba(255, 255, 255, 0.1);
        background-image: url(/images/Mobile_bg0333.png);
        color: #cccccc;
    }
    .study-model .study-model-box{
        background: #1a1a1a;
        border: 1px solid rgba(255, 255, 255, 0.1);
    }
    .study-model .study-model-box .model-item .item-inner{
        background: rgba(255, 255, 255, 0.1);
    }
    .study-model .study-model-box .model-item .item-sub-title{
        color: rgba(255, 255, 255, 0.5);
    }
    .study-model .study-model-box .model-item.selected .item-inner{
        background: #000000;
    }
}