.container {
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
    overflow: hidden;
    display: flex;
    /*align-items: center;*/
    padding: 30px 20px;
    position: relative;
    margin: 40px 0;
}

/* 左侧视频封面 */
.video-cover {
    width: 400px;
    height: 200px;
    background-color: #564fc9;
    border-radius: 8px;
    position: relative;
    margin-right: 24px;
    flex-shrink: 0;
}

.video-cover .play-btn {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 90px;
    height: 90px;
    background: url(https://static-xiaodaa-com.oss-cn-shanghai.aliyuncs.com/image/PC/74a30f12d64e4ecaa54a72a4c2c88d63.png) no-repeat center 0;
    cursor: pointer;
}


.video-cover .title {
    position: absolute;
    top: 20px;
    left: 20px;
    color: #fff;
    font-size: 20px;
    font-weight: 600;
}

.video-cover .subtitle {
    position: absolute;
    top: 50px;
    left: 20px;
    color: #fff;
    font-size: 16px;
}

.video-cover .icon {
    position: absolute;
    bottom: 10px;
    right: 10px;
    width: 80px;
    height: 60px;
    background-color: #564fc9;
    border-radius: 4px;
}

/* 右侧内容区 */
.content {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.content .tags {
    display: flex;
    gap: 8px;
    margin-bottom: 20px;
}
.content .tags .tag-left{
    background: url(https://static-xiaodaa-com.oss-cn-shanghai.aliyuncs.com/image/PC/3564ad9e9b2543879378352fe52db4a3.png) no-repeat center;
    width: 120px;
    background-size: 100%;
    display: flex;
    justify-content: space-between;
    margin-right: 10px;
}

.content .tags .tag-left .tag {
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 500;
    color: white;
}



.content .tags .desc {
    font-weight: 400;
    font-size: 15px;
    letter-spacing: 0.2px;
    line-height: 30px;
    height: 30px;
    text-align: center;
    color: #808080;
}

.content .main-title {
    font-weight: 700;
    font-size: 24px;
    letter-spacing: 0.02px;
    line-height: 18px;
    color: #333;
    margin-bottom: 25px;
}

.content .info-list {
    margin-bottom: 16px;
}

.content .info-item {
    display: flex;
    align-items: center;
    font-size: 15px;
    color: #808080;
    margin-bottom: 8px;
}

.content .info-item .icon {
    width: 12px;
    height: 22px;
    margin-right: 12px;
    color: #564fc9;
    border-radius: 2px;
}

.content .info-item .tag {
    background-color: #4d4d4d;;
    padding: 2px 10px;
    border-radius: 4px;
    font-size: 12px;
    margin-left: 40px;
    opacity: 0.9;
    color: white;
}

.content .features {
    display: flex;
    gap: 24px;
    margin-bottom: 24px;
    font-size: 16px;
    color: #4d4d4d;
}

.content .bottom-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 620px;
    margin-bottom: 20px;
}

.content .price {
    display: flex;
    align-items: center;
    font-size: 20px;
    font-weight: 600;
    color: #ff4d4f;
}

.content .price .icon {
    width: 20px;
    height: 20px;
    border-radius: 2px;
    margin-right: 12px;
}

.content .mode {
    font-size: 14px;
    color: #666;
    margin-left: 16px;
    width: 250px;
}

.content .mode  .pro-pop {
    display:flex;
    justify-content:space-between;
    align-items:center;
    padding:10px; /* 30rpx ÷ 2 = 15px */
    background:linear-gradient(90.00deg,#fff5e3 0%,#fff4e1 100%);
    border-radius:8px; /* 16rpx ÷ 2 = 8px */
    opacity:0.8;
    margin:10px 0; /* 20rpx ÷ 2 = 10px */
}
.content .mode  .pro-pop-l {
    display:flex;
    align-items:center;
}
.content .mode .tag {
    background-color:#4D4D4D;
    border-radius:6px; /* 12rpx ÷ 2 = 6px */
    font-size:14px; /* 28rpx ÷ 2 = 14px */
    color:#fff;
    padding:0 6px; /* 12rpx ÷ 2 = 6px */
    flex-shrink: 0;
}
.content .mode  .more-img {
    width:16px; /* 32.4rpx ÷ 2 = 16.2px */
    height:16px; /* 32.4rpx ÷ 2 = 16.2px */
}

.content .btn {
    padding: 10px 24px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    border: none;
}

.content .btn.join {
    background-color: #1677ff;
    color: #fff;
}

.content .btn.joined {
    background-color: #666;
    color: #fff;
    cursor: not-allowed;
}

.content .tip {
    font-size: 12px;
    color: #999;
    margin-top: 8px;
    text-align: right;
}

/* 弹窗样式 */
.popup {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 460px;
    background: #fff;
    border-radius: 16px;
    padding: 24px;
    z-index: 1000;
    display: none;
}

.popup.active {
    display: block;
}

.popup .item {
    padding: 8px 12px;
    background-color: #f5f5f5;
    border-radius: 4px;
    font-size: 14px;
    color: #333;
    margin-bottom: 8px;
    cursor: pointer;
}

.popup .item:last-child {
    margin-bottom: 0;
}

/* 遮罩层 */


.mask.active {
    display: block;
}

.video-cover img {
    width: 100%;
    height: 100%;
    border-radius: 8px;
}

/* 独立遮罩层 */
.img-mask {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border-radius: 8px;
    background-color: rgba(0, 0, 0, 0.1); /* 30%透明度黑色 */
    /* 居中显示遮罩上的文字 */
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 18px;
    font-weight: 600;
}

.wrap1{
    padding: 40px;
    width: 800px;
    margin: 0 auto;
}
#mask {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 999;
    display: none;
}
.pop-section {
    /*background-color: #f5f5f5;*/
    padding: 30px 10px; /* 60rpx÷2=30px，20rpx÷2=10px */
    box-sizing: border-box;
}

/* 任务卡片容器 */
.pop-section  .task-card {
    background-color: #fff;
    border-radius: 8px; /* 16rpx÷2=8px */
    padding: 16px; /* 32rpx÷2=16px */
    margin-bottom: 16px; /* 32rpx÷2=16px */
    box-shadow: 0 1px 4px rgba(0,0,0,0.15); /* 补充PC端轻微阴影，提升质感 */
}

/* 卡片标题栏（Flex 布局） */
.pop-section .big-title{
    display: flex;
    font-weight: 700;
    justify-content: center;
    font-size: 17px; /* 34rpx÷2=17px */
    letter-spacing: 0.1px; /* 0.2rpx÷2=0.1px */
    line-height: 40px; /* 80rpx÷2=40px */
    height: 40px; /* 80rpx÷2=40px */
    color: #333;
    width: 100%;
    padding-bottom: 10px; /* 20rpx÷2=10px */
    border-bottom: 1px solid #f0f0f0; /* 补充下划线，PC端视觉更清晰 */
    margin-bottom: 8px; /* 新增：标题底部留白，优化排版 */
}

.pop-section .card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px; /* 24rpx÷2=12px */
    cursor: pointer; /* 新增：PC端鼠标悬浮手型，提示可点击 */
}

.pop-section .header-left {
    display: flex;
    align-items: center;
}

.pop-section .check-icon {
    width: 20px; /* 40rpx÷2=20px */
    height: 20px; /* 40rpx÷2=20px */
    background-color: #FFA405;
    border-radius: 50%;
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 8px; /* 16rpx÷2=8px */
    font-size: 12px; /* 24rpx÷2=12px */
    font-weight: bold; /* 新增：勾选符号加粗，PC端更清晰 */
}

.pop-section .card-title {
    font-size: 16px; /* 32rpx÷2=16px */
    font-weight: bold;
    color: #333;
}

.pop-section .view-detail {
    font-size: 14px; /* 28rpx÷2=14px */
    color: #007aff;
    text-decoration: none;
    font-weight: 500; /* 新增：金额加粗，突出显示 */
}

/* 导航栏hover样式（PC端补充交互） */
.pop-section .header-left:hover .card-title {
    color: #0066cc; /* 原nav-hover颜色，绑定到可点击区域 */
}
.pop-section .view-detail:hover {
    color: #0066cc;
    text-decoration: underline; /* 新增：hover下划线，PC端交互提示 */
}

/* 任务列表 */
.pop-section .task-list {
    padding-left: 28px; /* 56rpx÷2=28px */
    padding-bottom: 10px; /* 20rpx÷2=10px */
}

.pop-section .task-item {
    font-size: 14px; /* 28rpx÷2=14px */
    color: #666;
    line-height: 24px; /* 48rpx÷2=24px */
    margin-bottom: 8px; /* 16rpx÷2=8px */
    text-align: justify; /* 新增：文本两端对齐，PC端排版更整洁 */
}

/* 确定按钮 */
.pop-section .confirm-btn {
    width: 100%;
    height: 44px; /* 88rpx÷2=44px */
    background-color: #666;
    color: #fff;
    border: none;
    border-radius: 8px; /* 16rpx÷2=8px */
    font-size: 16px; /* 32rpx÷2=16px */
    line-height: 44px; /* 88rpx÷2=44px */
    padding: 0;
    cursor: pointer; /* 新增：PC端鼠标悬浮手型 */
    transition: background-color 0.2s ease; /* 新增：hover过渡动画 */
}

/* 按钮hover/active样式（PC端补充交互） */
.pop-section .confirm-btn:hover {
    background-color: #555; /* 鼠标悬浮加深颜色 */
}
.pop-section .confirm-btn:active {
    background-color: #444; /* 点击时进一步加深 */
}

/* 移除小程序特有样式（HTML中无需保留） */
.pop-section .confirm-btn::after {
    border: none;
}

/*section2样式开始处*/
.section2{
    height: 500px;
    padding-top: 70px;
    background-color: #f7f7f7;
    background-position: center;
    background-size: cover;
    box-sizing: border-box;
}
.section2 h1{
    text-align: center;
    font-size: 32px;
    letter-spacing: 3px;
}
.section2 h3{
    margin-top: 25px;
    text-align: center;
    font-size: 18px;
    color: #5a5e73;
}
.section2 .box1 .box-item{
    float: left;
    margin-left: 210px;
    margin-top: 70px;
}
.section2 .box1 .box-item img{
    display: block;
    margin: auto;
    width: 75px;
}
.section2 .box1 .box-item .right-box{
    margin-top: 35px;
}
.section2 .box1 .box-item .item-tit{
    font-size: 20px;
    line-height: 24px;
    text-align: center;
    letter-spacing: 1px;
    font-weight: bold;
}
.section2 .box1 .box-item .item-desc{
    margin-top: 18px;
    font-size: 16px;
    line-height: 27px;
    color: #5b6375;
    text-align: center;
}

/*section4样式开始处*/
.section4{
    height: 757px;
    padding-top: 85px;
    background-color: #f7f7f7;
    box-sizing: border-box;
}
.section4 h1{
    text-align: center;
    font-size: 32px;
    letter-spacing: 3px;
}
.section4 h3{
    margin-top: 25px;
    text-align: center;
    font-size: 18px;
    color: #5a5e73;
}
.section4 .tab{
    margin-top: 80px;
    border-bottom: 1px solid #e8e8e8;
}
.section4 .tab .content-box{
    float: left;
    width: 25%;
    cursor: pointer;
}
.section4 .tab .content-box .circle{
    width: 55px;
    height: 55px;
    margin: auto;
    border-radius: 50%;
    text-align: center;
    line-height: 55px;
    color: #7d8692;
    background-color: #e1e3e5;
}
.section4 .tab .content-box .circle i{
    font-size: 28px;
}
.section4 .tab .content-box span{
    display: block;
    margin: 20px 0 30px;
    text-align: center;
    color: #696c75;
    font-size: 18px;
}
.section4 .tab .content-box .line{
    margin: auto;
    width: 130px;
    height: 2px;
}
.section4 .tab .active .circle{
    color: #fff;
    background-color: #ffa830;
}
.section4 .tab .active span{
    color: #ffa830;
}
.section4 .tab .active .line{
    background-color: #feb459;
}
.section4 .tab-content{

}
.section4 .class-content{

}
.section4 .class-content h2{
    margin: 50px 0;
    font-size: 24px;
    text-align: center;
}
.section4 .class-content ul{
    padding: 0 160px;
}
.section4 .class-content ul li{
    position: relative;
    float: left;
    width: 390px;
    height: 195px;
    padding-top: 30px;
    margin-right: 100px;
    text-align: center;
    background-color: #fff;
    border-radius: 10px;
    box-shadow: 0 0 50px rgba(0,0,0,.1);
    box-sizing: border-box;
}
.section4 .class-content ul li:last-child{
    margin-right: 0;
}
.section4 .class-content ul li .p-1{
    font-size: 20px;
    color: #ffa830;
}
.section4 .class-content ul li .p-2{
    margin-top: 15px;
    font-size: 16px;
    line-height: 24px;
    color: #85878d;
}
.section4 .class-content ul li .p-3{
    position: absolute;
    width: 100%;
    bottom: 20px;
    font-size: 16px;
    text-align: center;
}
.section4 .class-content ul .big{
    float: unset;
    width: 620px;
    margin: 95px auto!important;
}
/*section9样式开始处*/
.section9{
    padding: 50px 0;
    text-align: center;
    background-color: #333645;
}
.section9 h1{
    margin-bottom: 30px;
    font-size: 24px;
    /*color: #3a3a3a;*/
    color: #fff;
}
.section9 p{
    margin-top: 15px;
    /*color: #787878;*/
    color: #bfc0c3;
    font-size: 18px;
}