/* ============================================
   云课堂前端页面 - 样式增强
   用于增强和补充主样式表
   ============================================ */

/* ============================================
   首页课程区域增强
   ============================================ */

/* 课程网格布局 - 针对ul结构 */
.course ul {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    padding: 0;
    margin: 0;
    list-style: none;
}

/* 课程网格布局 - 针对div结构（课程列表页） */
.courseResult .course,
div.course:not(ul) {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    padding: 40px 0;
}

.course .course_title {
    width: 100%;
    flex: 0 0 100%;
    margin-bottom: 10px;
}

.course .course_item {
    flex: 0 0 calc(25% - 15px);
    max-width: 290px;
    margin: 0;
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
}

.course .course_item:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.course .course_item a {
    display: block;
    text-decoration: none;
}

.course .course_item b.img {
    display: block;
    width: 100%;
    height: 0;
    padding-bottom: 56.25%;
    position: relative;
    overflow: hidden;
    border-radius: var(--radius-md) var(--radius-md) 0 0;
}

.course .course_item b.img img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.course .course_item:hover b.img img {
    transform: scale(1.05);
}

/* 课程标题图标动画 */
.course .course_title img {
    transition: transform 0.5s ease;
}

.course .course_title:hover img {
    transform: rotate(15deg) scale(1.1);
}

/* 观看次数样式 */
.course .course_item .content p.word .ren {
    color: #93999F;
    font-size: 13px;
}

.course .course_item .content p.word .ren i {
    font-size: 12px;
}

/* 响应式布局 */
@media (max-width: 1200px) {
    .course .course_item {
        flex: 0 0 calc(25% - 15px);
    }
}

@media (max-width: 992px) {
    .course .course_item {
        flex: 0 0 calc(33.333% - 14px);
    }
}

@media (max-width: 768px) {
    .course .course_item {
        flex: 0 0 calc(50% - 10px);
        max-width: 100%;
    }
}

@media (max-width: 480px) {
    .course .course_item {
        flex: 0 0 100%;
    }
}

/* ============================================
   轮播区域增强
   ============================================ */
.layui-carousel {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.layui-carousel>[carousel-item]>* {
    border-radius: var(--radius-lg);
}

.layui-carousel-ind {
    padding: 15px;
}

.layui-carousel-ind ul {
    background: rgba(0, 0, 0, 0.3);
    padding: 5px;
    border-radius: 10px;
}

.layui-carousel-ind li {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    transition: all var(--transition-normal);
}

.layui-carousel-ind li:hover {
    background: rgba(255, 255, 255, 0.8);
}

.layui-carousel-ind li.layui-this {
    background: #fff;
    width: 24px;
    border-radius: 5px;
}

/* ============================================
   导航下拉菜单增强
   ============================================ */
.layui-nav {
    background: transparent;
    padding: 0;
}

.layui-nav .layui-nav-item {
    line-height: 70px;
}

.layui-nav .layui-nav-item a {
    color: var(--text-primary);
    font-size: 14px;
    padding: 0 15px;
    transition: all var(--transition-fast);
}

.layui-nav .layui-nav-item a:hover {
    color: var(--primary-color);
}

.layui-nav .layui-nav-child {
    top: 65px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    border: none;
    padding: 8px 0;
    min-width: 140px;
}

.layui-nav .layui-nav-child dd {
    line-height: 40px;
}

.layui-nav .layui-nav-child dd a {
    padding: 0 20px;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.layui-nav .layui-nav-child dd a:hover {
    background: #e6f7ff;
    color: var(--primary-color);
}

.layui-nav .layui-nav-child dd.layui-this a {
    background: var(--primary-color);
    color: #fff;
}

.layui-nav .layui-nav-child dd.layui-this a:hover {
    background: var(--primary-dark);
}

.layui-nav-img {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 2px solid var(--border-light);
    transition: all var(--transition-normal);
}

.layui-nav-img:hover {
    border-color: var(--primary-light);
    transform: scale(1.05);
}

/* ============================================
   课程详情页标签页增强
   ============================================ */
.course_content .content_left .layui-tab {
    margin: 0;
    box-shadow: none;
}

.course_content .content_left .layui-tab-title {
    background: #fafafa;
    border-bottom: 2px solid var(--border-light);
    padding: 0 20px;
    white-space: nowrap;
    overflow-x: auto;
    display: flex;
    flex-wrap: nowrap;
}

.course_content .content_left .layui-tab-title li {
    padding: 0 20px;
    font-size: 15px;
    flex-shrink: 0;
}

.course_content .content_left .layui-tab-title li h3 {
    margin: 0;
    font-weight: 500;
    font-size: 15px;
}

.course_content .content_left .layui-tab-title .layui-this {
    color: var(--primary-color);
}

.course_content .content_left .layui-tab-title .layui-this:after {
    height: 3px;
    background: var(--primary-gradient);
    border-radius: 3px 3px 0 0;
}

.course_content .content_left .layui-tab-content {
    padding: 30px;
    min-height: 400px;
}

.course_content .content_left .layui-tab-item {
    font-size: 15px;
    line-height: 1.5;
    color: var(--text-secondary);
}

.course_content .content_left .layui-tab-item p {
    margin-bottom: 2px;
}

.course_content .content_left .layui-tab-item img {
    max-width: 100%;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    margin: 2px 0;
}

/* 右侧标签页 */
.course_content .content_right .layui-tab {
    box-shadow: none;
}

.course_content .content_right .layui-tab-title {
    background: transparent;
    border-bottom: 2px solid var(--border-light);
    padding: 0;
}

.course_content .content_right .layui-tab-title li {
    padding: 0 16px;
}

.course_content .content_right .layui-tab-title li h3 {
    margin: 0;
    font-size: 16px;
    font-weight: 600;
}

.course_content .content_right .layui-tab-content {
    padding: 20px 0;
}

/* ============================================
   课程详情页按钮增强
   ============================================ */
.course_intro .course_detail .layui-btn-lg {
    height: 48px;
    line-height: 48px;
    padding: 0 32px;
    font-size: 16px;
    border-radius: 24px;
    font-weight: 500;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-md);
}

.course_intro .course_detail .layui-btn-lg:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.course_intro .course_detail a[href="/toPayVip"] {
    background: linear-gradient(135deg, #fa8c16 0%, #ffc53d 100%) !important;
    border: none;
}

.course_intro .course_detail a[href="/toPayVip"]:hover {
    background: linear-gradient(135deg, #d46b08 0%, #d48806 100%) !important;
}

/* ============================================
   面包屑导航增强
   ============================================ */
.course_body .course_nav .layui-breadcrumb {
    background: transparent;
    box-shadow: none;
    padding: 0 !important;
    margin: 0;
}

.course_body .course_nav .layui-breadcrumb a {
    color: var(--text-secondary) !important;
    font-size: 14px;
    transition: color var(--transition-fast);
}

.course_body .course_nav .layui-breadcrumb a:hover {
    color: var(--primary-color) !important;
}

.course_body .course_nav .layui-breadcrumb a cite {
    color: var(--text-primary);
    font-weight: 500;
}

.course_body .course_nav .layui-breadcrumb span[lay-separator] {
    color: var(--text-muted);
    margin: 0 8px;
}

/* ============================================
   分享按钮样式
   ============================================ */
.social-share {
    display: flex;
    gap: 8px;
}

.social-share .icon-wechat,
.social-share .icon-weibo,
.social-share .icon-qq {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    cursor: pointer;
}

.social-share .icon-wechat {
    background: #07c160;
    color: #fff;
}

.social-share .icon-weibo {
    background: #ff8200;
    color: #fff;
}

.social-share .icon-qq {
    background: #12b7f5;
    color: #fff;
}

.social-share .icon-wechat:hover,
.social-share .icon-weibo:hover,
.social-share .icon-qq:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ============================================
   文章详情页增强
   ============================================ */
.article_content {
    animation: fadeIn 0.6s ease-out;
}

.article_content .content h1,
.article_content .content h2,
.article_content .content h3 {
    color: var(--text-primary);
    margin: 32px 0 16px;
    font-weight: 600;
}

.article_content .content h1 {
    font-size: 24px;
    border-bottom: 2px solid var(--border-light);
    padding-bottom: 12px;
}

.article_content .content h2 {
    font-size: 20px;
}

.article_content .content h3 {
    font-size: 18px;
}

.article_content .content ul,
.article_content .content ol {
    padding-left: 24px;
    margin: 6px 0;
}

.article_content .content li {
    margin: 2px 0;
    line-height: 1.5;
}

.article_content .content code {
    background: var(--bg-tertiary);
    padding: 2px 8px;
    border-radius: 4px;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 14px;
    color: var(--primary-dark);
}

.article_content .content pre {
    background: #1e1e1e;
    color: #d4d4d4;
    padding: 20px;
    border-radius: var(--radius-md);
    overflow-x: auto;
    margin: 20px 0;
}

.article_content .content pre code {
    background: transparent;
    color: inherit;
    padding: 0;
}

.article_content .content blockquote {
    border-left: 4px solid var(--primary-color);
    background: var(--bg-secondary);
    padding: 16px 20px;
    margin: 20px 0;
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    font-style: italic;
    color: var(--text-secondary);
}

.article_content .content a {
    color: var(--primary-color);
    text-decoration: none;
    border-bottom: 1px dashed var(--primary-light);
    transition: all var(--transition-fast);
}

.article_content .content a:hover {
    border-bottom-style: solid;
}

.article_content .content table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.article_content .content th,
.article_content .content td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border-light);
}

.article_content .content th {
    background: var(--bg-tertiary);
    font-weight: 600;
    color: var(--text-primary);
}

.article_content .content tr:hover {
    background: var(--bg-secondary);
}

/* ============================================
   课程列表页增强
   ============================================ */
.courseList_body .w1220 {
    animation: fadeIn 0.5s ease-out;
}

.courseList_body .searchContent {
    background: var(--bg-primary);
    padding: 24px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    margin-bottom: 30px;
}

.courseList_body .searchContent .li_1,
.courseList_body .searchContent .li_2,
.courseList_body .searchContent .li_3 {
    border-bottom-color: var(--border-light);
}

.courseList_body .searchContent .li_3 .s_input {
    border: 2px solid var(--border-color);
    transition: all var(--transition-fast);
}

.courseList_body .searchContent .li_3 .s_input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(24, 144, 255, 0.1);
    outline: none;
}

/* ============================================
   登录页面增强
   ============================================ */
.login-content {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.lc-block {
    background: rgba(255, 255, 255, 0.95);
    border-radius: var(--radius-xl);
    padding: 40px;
    box-shadow: var(--shadow-lg);
    backdrop-filter: blur(10px);
    max-width: 400px;
    width: 90%;
    animation: fadeIn 0.6s ease-out;
}

.lc-block h1.lean {
    text-align: center;
    color: var(--text-primary);
    font-size: 28px;
    margin-bottom: 30px;
    font-weight: 300;
    letter-spacing: 2px;
}

.lc-block .input-group {
    margin-bottom: 20px;
}

.lc-block .input-group-addon {
    background: transparent;
    border: none;
    color: var(--text-muted);
}

.lc-block .fg-line {
    position: relative;
}

.lc-block .form-control {
    border: none;
    border-bottom: 2px solid var(--border-color);
    border-radius: 0;
    padding: 12px 0;
    font-size: 16px;
    background: transparent;
    transition: all var(--transition-fast);
}

.lc-block .form-control:focus {
    border-bottom-color: var(--primary-color);
    box-shadow: none;
    outline: none;
}

.lc-block .form-control::placeholder {
    color: var(--text-muted);
}

.lc-block .btn-login {
    width: 100%;
    height: 48px;
    border-radius: 24px;
    background: var(--primary-gradient);
    border: none;
    color: #fff;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-normal);
    margin-top: 20px;
}

.lc-block .btn-login:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-primary);
}

/* ============================================
   个人中心增强
   ============================================ */
.my-center {
    padding: 40px 0;
}

.my-center .user-card {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    padding: 30px;
    box-shadow: var(--shadow-sm);
    text-align: center;
    margin-bottom: 30px;
}

.my-center .user-card img {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    border: 4px solid var(--border-light);
    margin-bottom: 16px;
    transition: all var(--transition-normal);
}

.my-center .user-card img:hover {
    border-color: var(--primary-light);
    transform: scale(1.05);
}

.my-center .user-card h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 8px;
}

.my-center .user-card p {
    color: var(--text-muted);
    margin: 0;
}

.my-center .vip-badge-large {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--vip-gradient);
    color: #fff;
    padding: 8px 20px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
    margin-top: 16px;
    box-shadow: 0 4px 12px rgba(250, 140, 22, 0.3);
}

.my-center .vip-badge-large::before {
    content: '★';
}

/* ============================================
   VIP支付页面增强
   ============================================ */
.pay-vip-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 40px 20px;
}

.pay-vip-container .vip-header {
    text-align: center;
    margin-bottom: 40px;
}

.pay-vip-container .vip-header h2 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 12px;
    background: var(--vip-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.pay-vip-container .vip-header p {
    color: var(--text-muted);
    font-size: 16px;
}

.pay-vip-container .vip-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 40px;
}

.pay-vip-container .vip-option {
    background: var(--bg-primary);
    border: 2px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: 30px;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.pay-vip-container .vip-option:hover {
    border-color: var(--vip-color);
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.pay-vip-container .vip-option.selected {
    border-color: var(--vip-color);
    background: rgba(250, 140, 22, 0.05);
}

.pay-vip-container .vip-option h3 {
    font-size: 18px;
    margin-bottom: 12px;
}

.pay-vip-container .vip-option .price {
    font-size: 36px;
    font-weight: 700;
    color: var(--vip-color);
    margin-bottom: 8px;
}

.pay-vip-container .vip-option .price span {
    font-size: 16px;
    font-weight: 400;
}

.pay-vip-container .vip-option .original-price {
    text-decoration: line-through;
    color: var(--text-muted);
    font-size: 14px;
}

.pay-vip-container .pay-button {
    width: 100%;
    max-width: 400px;
    margin: 0 auto;
    display: block;
    height: 52px;
    border-radius: 26px;
    background: var(--vip-gradient);
    border: none;
    color: #fff;
    font-size: 18px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    box-shadow: 0 4px 16px rgba(250, 140, 22, 0.3);
}

.pay-vip-container .pay-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(250, 140, 22, 0.4);
}

/* ============================================
   加载动画
   ============================================ */
.lazy {
    opacity: 0;
    transition: opacity 0.3s ease;
}

.lazy.loaded {
    opacity: 1;
}

/* 骨架屏 */
.skeleton {
    background: linear-gradient(90deg, var(--bg-tertiary) 25%, var(--bg-secondary) 50%, var(--bg-tertiary) 75%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s infinite;
    border-radius: var(--radius-md);
}

@keyframes skeleton-loading {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

/* ============================================
   滚动条美化
   ============================================ */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
    transition: background var(--transition-fast);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* ============================================
   选中文字样式
   ============================================ */
::selection {
    background: rgba(24, 144, 255, 0.2);
    color: var(--primary-dark);
}

/* ============================================
   焦点样式
   ============================================ */
:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}