/* 全局样式重置与基础配置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}

:root {
    /* 色彩系统 */
    --primary: #165dff;
    --primary-light: #e8f3ff;
    --primary-dark: #0e42cc;
    --bg-main: #f8f9fc;
    --bg-card: #ffffff;
    --text-primary: #1d2129;
    --text-secondary: #6e7681;
    --text-placeholder: #a9aeb8;
    --border-light: #e5e6eb;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.16);
    /* 尺寸与过渡 */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-full: 999px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    background-color: var(--bg-main);
    color: var(--text-primary);
    line-height: 1.5;
    padding-bottom: 80px;
}

/* 容器样式 */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 24px 20px;
}

/* 头部样式 */
.header {
    text-align: center;
    margin-bottom: 36px;
    padding: 32px 20px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    border-radius: var(--radius-lg);
    color: white;
    box-shadow: var(--shadow-md);
}

.header h1 {
    font-size: 28px;
    font-weight: 600;
    margin-bottom: 8px;
    letter-spacing: 0.5px;
}

.header p {
    font-size: 16px;
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto;
}

/* 分类区域样式 */
.category-section {
    margin-bottom: 32px;
    padding: 20px;
    background-color: var(--bg-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.category-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.category-title::before {
    content: '';
    width: 4px;
    height: 20px;
    background-color: var(--primary);
    border-radius: var(--radius-full);
}

.category-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.category-btn {
    padding: 8px 18px;
    background-color: var(--bg-main);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-full);
    color: var(--text-secondary);
    font-size: 14px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 6px;
}

.category-btn::before {
    content: '';
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--text-placeholder);
    transition: var(--transition);
}

.category-btn:hover {
    background-color: var(--primary-light);
    color: var(--primary);
    border-color: var(--primary-light);
}

.category-btn:hover::before {
    background-color: var(--primary);
}

.category-btn.active {
    background-color: var(--primary);
    color: white;
    border-color: var(--primary);
}

.category-btn.active::before {
    background-color: white;
}

/* 视频网格样式 */
.video-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-bottom: 36px;
}

.video-card {
    background-color: var(--bg-card);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    cursor: pointer;
}

.video-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-md);
}

/* 视频封面容器 */
.video-cover {
    width: 100%;
    aspect-ratio: 16/9; /* 保持封面16:9比例 */
    background-color: #0f1118;
    position: relative;
    overflow: hidden;
}

/* 手动封面图片样式（新增） */
.video-cover img.manual-cover {
    width: 100%;
    height: 100%;
    object-fit: cover; /* 保持图片比例，填满容器 */
    transition: var(--transition);
}

/* 自动提取的封面（canvas）样式 */
.video-cover canvas {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.video-card:hover .video-cover img,
.video-card:hover .video-cover canvas {
    transform: scale(1.02); /* hover放大效果，统一应用于图片和canvas */
}

/* 播放按钮 */
.play-btn {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 60px;
    height: 60px;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    z-index: 10; /* 确保播放按钮在封面之上 */
}

.play-btn::after {
    content: '';
    width: 0;
    height: 0;
    border-style: solid;
    border-width: 10px 0 10px 18px;
    border-color: transparent transparent transparent var(--primary);
    margin-left: 2px;
}

.video-card:hover .play-btn {
    opacity: 1;
}

/* 封面加载状态 */
.cover-status {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-placeholder);
    font-size: 14px;
    padding: 0 16px;
    text-align: center;
    z-index: 5;
}

/* 加载骨架屏 */
.cover-skeleton {
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, #1a1d26 0%, #232732 50%, #1a1d26 100%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s infinite;
    z-index: 3;
}

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

/* 视频信息区域 */
.video-info {
    padding: 16px;
}

/* .video-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 6px;
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
} */

.video-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 6px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.video-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 13px;
    color: var(--text-secondary);
}

.video-category {
    display: flex;
    align-items: center;
    gap: 4px;
}

.video-category::before {
    content: '';
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background-color: var(--text-placeholder);
}

/* 分页样式 */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.page-btn {
    padding: 9px 16px;
    background-color: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 14px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.page-btn:hover:not(.active):not(:disabled) {
    border-color: var(--primary-light);
    color: var(--primary);
    background-color: var(--primary-light);
}

.page-btn.active {
    background-color: var(--primary);
    color: white;
    border-color: var(--primary);
}

.page-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    background-color: var(--bg-main);
    border-color: var(--border-light);
}

.page-btn.arrow {
    width: 40px;
    height: 40px;
    padding: 0;
}

/* 页码输入跳转功能样式（匹配现有设计风格） */
/* 输入容器：保持与分页按钮的对齐和间距 */
.page-input-container {
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 0 4px; /* 适配分页区域gap，避免整体过宽 */
}

/* 页码输入框：匹配按钮高度/边框/圆角风格 */
.page-input {
    width: 60px;
    height: 40px; /* 与.page-btn高度一致（padding+border计算后） */
    padding: 0 12px;
    background-color: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 14px;
    transition: var(--transition);
    outline: none;
}

/* 输入框交互状态：与按钮hover/focus逻辑统一 */
.page-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(22, 93, 255, 0.1); /* 弱阴影提升聚焦感，不破坏简洁风 */
}

.page-input::placeholder {
    color: var(--text-placeholder); /* 占位符颜色匹配系统定义 */
}

/* 跳转按钮：完全复用.page-btn样式，仅增加专属类名 */
.page-btn.jump-btn {
    padding: 0 16px; /* 横向padding与数字页码按钮一致 */
    background-color: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 14px;
    cursor: pointer;
    transition: var(--transition);
}

/* 跳转按钮交互状态：与现有页码按钮完全同步 */
.page-btn.jump-btn:hover:not(:disabled) {
    border-color: var(--primary-light);
    color: var(--primary);
    background-color: var(--primary-light);
}

.page-btn.jump-btn:active:not(:disabled) {
    background-color: var(--primary);
    color: white;
    border-color: var(--primary);
}

.page-btn.jump-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    background-color: var(--bg-main);
    border-color: var(--border-light);
    color: var(--text-placeholder);
}

@media (max-width: 480px) {
    .page-input-container {
        gap: 4px;
    }

    .page-input {
        width: 50px;
        padding: 0 8px;
        font-size: 13px;
    }

    .page-btn.jump-btn {
        padding: 0 12px;
        font-size: 13px;
    }
}

@media (max-width: 768px) and (min-width: 481px) {
    .page-input {
        width: 56px;
        font-size: 13px;
    }

    .page-btn.jump-btn {
        font-size: 13px;
        padding: 0 14px;
    }
}

/* 模态框播放器样式 */
.video-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.9);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    padding: 24px;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.video-modal.active {
    display: flex;
    opacity: 1;
}

.modal-container {
    width: 100%;
    max-width: 1200px;
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 12px 48px rgba(0, 0, 0, 0.3);
}

.modal-header {
    padding: 16px 24px;
    background-color: #1a1d26;
    color: white;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-title {
    font-size: 18px;
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: calc(100% - 40px);
}

.close-modal {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.1);
    border: none;
    color: white;
    font-size: 20px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.close-modal:hover {
    background-color: rgba(255, 255, 255, 0.2);
    transform: rotate(90deg);
}

.modal-player {
    width: 100%;
    aspect-ratio: 16/9;
    background-color: #000;
}

#modalVideoPlayer {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

/* 响应式样式 */
@media (max-width: 1024px) {
    .video-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 20px;
    }

    .header h1 {
        font-size: 24px;
    }
}

@media (max-width: 768px) {
    .video-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }

    .header {
        padding: 24px 16px;
    }

    .header h1 {
        font-size: 20px;
    }

    .header p {
        font-size: 14px;
    }

    .category-section {
        padding: 16px;
    }

    .category-title {
        font-size: 16px;
    }

    .category-btn {
        padding: 6px 14px;
        font-size: 13px;
    }

    .video-info {
        padding: 12px;
    }

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

    .modal-container {
        max-width: 100%;
    }

    .modal-header {
        padding: 12px 16px;
    }

    .modal-title {
        font-size: 16px;
    }
}

@media (max-width: 480px) {
    .video-grid {
        grid-template-columns: 1fr;
    }

    .category-buttons {
        gap: 8px;
    }

    .pagination {
        gap: 4px;
    }

    .page-btn {
        padding: 8px 12px;
        font-size: 13px;
    }

    .page-btn.arrow {
        width: 36px;
        height: 36px;
    }

    .video-modal {
        padding: 16px;
    }
}

/* 隐藏封面提取用的视频元素 */
.cover-extractor {
    display: none !important;
}