/**
 * MB7 紧凑黑色模板样式
 * 配色：黑底白字，Bootstrap导航风格
 * 版本：1.0.0
 */

/* ============================================================================
   基础样式重置
   ========================================================================= */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
    font-size: 13px;
    line-height: 1.5;
    color: #ddd;
    background: #1a1a1a;
}

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.2s;
}

a:hover {
    color: #4CAF50;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

ul, ol, dl {
    list-style: none;
}

.container, .container-fluid {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 10px;
}

/* ============================================================================
   顶部导航栏 (Bootstrap风格)
   ========================================================================= */
.navbar {
    background: #2c2c2c;
    border-bottom: 1px solid #444;
    padding: 0;
    position: relative;
}

.navbar .container-fluid {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 8px 10px;
}

.navbar-brand a {
    font-size: 20px;
    font-weight: bold;
    color: #4CAF50;
    padding: 5px 10px;
}

/* 汉堡菜单按钮（默认隐藏，移动端显示） */
.nav-toggle {
    display: none;
}

.nav-toggle-label {
    display: none;
    flex-direction: column;
    justify-content: space-around;
    width: 28px;
    height: 22px;
    cursor: pointer;
    z-index: 1000;
}

.nav-toggle-label span {
    display: block;
    width: 100%;
    height: 3px;
    background: #4CAF50;
    border-radius: 2px;
    transition: all 0.3s;
}

/* 选中状态的动画效果 */
.nav-toggle:checked ~ .container-fluid .nav-toggle-label span:nth-child(1) {
    transform: rotate(45deg) translate(7px, 7px);
}

.nav-toggle:checked ~ .container-fluid .nav-toggle-label span:nth-child(2) {
    opacity: 0;
}

.nav-toggle:checked ~ .container-fluid .nav-toggle-label span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

/* 导航菜单容器 */
.navbar-collapse {
    display: flex;
    align-items: center;
    flex: 1;
    gap: 15px;
}

/* 导航菜单 */
.nav-menu {
    display: flex;
    align-items: center;
    flex: 1;
    gap: 2px;
}

.nav-menu > li {
    position: relative;
}

.nav-menu > li > a {
    display: block;
    padding: 8px 12px;
    color: #ddd;
    font-size: 13px;
}

.nav-menu > li > a:hover,
.nav-menu > li.dropdown:hover > a {
    background: #4CAF50;
    color: #fff;
}

/* 下拉菜单 */
.dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background: #333;
    min-width: 130px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.3);
    z-index: 1000;
}

.dropdown:hover .dropdown-menu {
    display: block;
}

/* 下拉箭头图标（默认隐藏，仅移动端显示） */
.dropdown-icon {
    display: none;
}

.dropdown-menu li a {
    display: block;
    padding: 6px 12px;
    color: #ddd;
    font-size: 12px;
}

.dropdown-menu li a:hover {
    background: #4CAF50;
    color: #fff;
}

/* 搜索框 */
.navbar-search {
    flex-shrink: 0;
}

.search-form {
    display: flex;
}

.search-input {
    width: 150px;
    padding: 5px 10px;
    border: 1px solid #444;
    background: #1a1a1a;
    color: #ddd;
    font-size: 12px;
}

.search-btn {
    padding: 5px 15px;
    background: #4CAF50;
    color: #fff;
    border: none;
    cursor: pointer;
    font-size: 12px;
    font-weight: bold;
}

.search-btn:hover {
    background: #45a049;
}

/* ============================================================================
   主内容区域
   ========================================================================= */
.main-content {
    padding: 15px 0;
    min-height: calc(100vh - 200px);
}

/* 面包屑导航 */
.breadcrumb {
    padding: 8px 0;
    color: #888;
    font-size: 12px;
}

.breadcrumb .separator {
    margin: 0 5px;
}

.breadcrumb .current {
    color: #4CAF50;
}

/* ============================================================================
   分类区块
   ========================================================================= */
.category-section {
    margin-bottom: 25px;
    background: #252525;
    border-radius: 4px;
    padding: 12px;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
    padding-bottom: 8px;
    border-bottom: 1px solid #4CAF50;
}

.section-title {
    font-size: 16px;
    font-weight: bold;
    color: #fff;
}

.more-link {
    color: #4CAF50;
    font-size: 12px;
}

/* 视频网格 */
.video-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 10px;
}

.video-item {
    background: #1a1a1a;
    border-radius: 4px;
    overflow: hidden;
    transition: transform 0.2s;
}

.video-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 3px 10px rgba(76, 175, 80, 0.3);
}

.video-thumb {
    position: relative;
    padding-bottom: 56.25%;
    background: #000;
    overflow: hidden;
}

.video-thumb img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.video-name {
    padding: 8px 6px;
    font-size: 12px;
    color: #ddd;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* ============================================================================
   列表页
   ========================================================================= */
.page-header {
    margin-bottom: 15px;
}

.page-title {
    font-size: 20px;
    font-weight: bold;
    color: #fff;
}

/* ============================================================================
   播放页
   ========================================================================= */
.video-header {
    margin-bottom: 12px;
}

.video-title {
    font-size: 20px;
    font-weight: bold;
    color: #fff;
}

.video-player-wrapper {
    margin-bottom: 15px;
    background: #000;
    border-radius: 4px;
    overflow: hidden;
}

.video-player-wrapper iframe {
    width: 100%;
    height: 500px;
    display: block;
}

/* 选集列表 */
.episode-section {
    background: #252525;
    border-radius: 4px;
    padding: 12px;
    margin-bottom: 15px;
}

.episode-title {
    font-size: 14px;
    margin-bottom: 10px;
    color: #fff;
    padding-bottom: 8px;
    border-bottom: 1px solid #4CAF50;
}

.episode-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.episode-btn {
    display: inline-block;
    padding: 6px 12px;
    background: #333;
    color: #ddd;
    border: 1px solid #444;
    border-radius: 3px;
    font-size: 12px;
    transition: all 0.2s;
}

.episode-btn:hover,
.episode-btn.active {
    background: #4CAF50;
    color: #fff;
    border-color: #4CAF50;
}

/* 播放提示 */
.play-tip {
    background: #4CAF50;
    color: #fff;
    text-align: center;
    padding: 8px;
    border-radius: 4px;
    margin-bottom: 15px;
    font-size: 13px;
}

/* 推荐视频 */
.recommend-section {
    margin-top: 25px;
    padding: 12px;
    background: #252525;
    border-radius: 4px;
}

/* ============================================================================
   分页导航
   ========================================================================= */
.pagination {
    text-align: center;
    padding: 20px 0;
}

.pagination__desktop {
    display: inline-block;
}

.pagination__mobile {
    display: none;
}

.pagination__link,
.pagination__current {
    display: inline-block;
    padding: 6px 10px;
    margin: 0 2px;
    border: 1px solid #444;
    border-radius: 3px;
    color: #ddd;
    background: #2c2c2c;
    font-size: 12px;
}

.pagination__link:hover,
.pagination__current {
    background: #4CAF50;
    color: #fff;
    border-color: #4CAF50;
}

.pagination__select {
    padding: 6px 10px;
    border: 1px solid #444;
    border-radius: 3px;
    font-size: 12px;
    margin-left: 8px;
    background: #2c2c2c;
    color: #ddd;
}

/* ============================================================================
   底部版权区域
   ========================================================================= */
.site-footer {
    background: #2c2c2c;
    color: #888;
    padding: 20px 0;
    margin-top: 30px;
    border-top: 1px solid #444;
}

.footer-content {
    text-align: center;
}

.footer-content p {
    margin: 5px 0;
    font-size: 12px;
}

.footer-content a {
    color: #4CAF50;
    margin: 0 5px;
}

/* ============================================================================
   响应式布局 - 平板
   ========================================================================= */
@media screen and (max-width: 1024px) {
    .video-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* ============================================================================
   响应式布局 - 移动端
   ========================================================================= */
@media screen and (max-width: 768px) {

    /* 导航条容器 */
    .navbar {
        position: relative;
    }

    .navbar .container-fluid {
        display: flex;
        justify-content: space-between;
        align-items: center;
        flex-wrap: wrap;
        padding: 10px 15px;
    }

    /* Logo区域 */
    .navbar-brand {
        order: 0;
        flex: 0 0 auto;
    }

    .navbar-brand a {
        font-size: 18px;
    }

    /* 汉堡菜单按钮 */
    .nav-toggle-label {
        display: flex;
        order: 1;
        flex: 0 0 auto;
        margin-left: auto;
    }

    /* 导航菜单容器 - 默认隐藏 */
    .navbar-collapse {
        display: none;
        order: 2;
        width: 100%;
        flex-direction: column;
        background: #2c2c2c;
        margin-top: 10px;
        border-top: 1px solid #444;
    }

    /* 当 checkbox 被选中时显示导航 */
    .nav-toggle:checked ~ .container-fluid .navbar-collapse {
        display: flex;
        animation: slideDown 0.3s ease-out;
    }

    @keyframes slideDown {
        from {
            opacity: 0;
            max-height: 0;
        }
        to {
            opacity: 1;
            max-height: 1000px;
        }
    }

    /* 导航菜单列表 */
    .nav-menu {
        width: 100%;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        padding: 0;
        margin: 0;
    }

    .nav-menu > li {
        border-bottom: 1px solid #444;
    }

    .nav-menu > li:last-child {
        border-bottom: none;
    }

    .nav-menu > li > a {
        display: block;
        padding: 12px 15px;
        color: #ddd;
        font-size: 14px;
        background: transparent;
        transition: background 0.2s;
    }

    .nav-menu > li > a:hover {
        background: #4CAF50;
        color: #fff;
    }

    /* 显示下拉箭头图标 */
    .dropdown-toggle {
        display: flex;
        justify-content: space-between;
        align-items: center;
    }

    .dropdown-icon {
        display: inline-block;
        font-size: 10px;
        margin-left: 8px;
        transition: transform 0.3s ease;
    }

    /* 展开状态时旋转箭头 */
    .dropdown.active .dropdown-icon {
        transform: rotate(180deg);
    }

    /* 下拉菜单 */
    .dropdown-menu {
        position: static;
        display: none;
        background: #1a1a1a;
        box-shadow: none;
        border: none;
        border-left: 3px solid #4CAF50;
        min-width: auto;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease-out;
    }

    /* 移动端使用 .active 类控制显示 */
    .dropdown.active .dropdown-menu {
        display: block;
        max-height: 500px;
    }

    .dropdown-menu li a {
        padding: 10px 15px 10px 25px;
        font-size: 13px;
        color: #bbb;
    }

    .dropdown-menu li a:hover {
        background: #333;
        color: #fff;
    }

    /* 搜索框 */
    .navbar-search {
        width: 100%;
        padding: 15px 0 10px 0;
        border-top: 1px solid #444;
    }

    .search-form {
        width: 100%;
        display: flex;
    }

    .search-input {
        flex: 1;
        width: auto;
        padding: 8px 12px;
        font-size: 14px;
    }

    .search-btn {
        padding: 8px 20px;
        font-size: 13px;
    }

    .video-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 8px;
    }

    .video-name {
        font-size: 11px;
        padding: 6px 4px;
    }

    .pagination__desktop {
        display: none;
    }

    .pagination__mobile {
        display: inline-block;
    }

    .video-player-wrapper iframe {
        height: 300px;
    }
}

/* ============================================================================
   响应式布局 - 小屏手机
   ========================================================================= */
@media screen and (max-width: 480px) {

    .video-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .section-title {
        font-size: 14px;
    }

    .page-title,
    .video-title {
        font-size: 16px;
    }

    .video-player-wrapper iframe {
        height: 250px;
    }
}