* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f5f5f5;
    color: #333;
    line-height: 1.6;
}

.container {
    max-width: 100%;
    margin: 0 auto;
    padding: 0 20px;
}

/* 头部样式 */
.header {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    color: #fff;
    padding: 15px 0;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 10px rgba(0,0,0,0.3);
}

.header-top {
    display: flex;
    align-items: center;
}

.header-top .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
}

.logo {
    font-size: 24px;
    font-weight: bold;
    flex-shrink: 0;
}

.logo a {
    color: #fff;
    text-decoration: none;
}

.nav {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
}

.nav ul {
    display: flex;
    list-style: none;
    gap: 25px;
}

.nav a {
    color: rgba(255,255,255,0.9);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s ease;
}

.nav a:hover {
    color: #4ecdc4;
}

.search-box {
    display: flex;
    align-items: center;
}

.search-box form {
    display: flex;
    background: rgba(255,255,255,0.1);
    border-radius: 25px;
    padding: 5px 15px;
}

.search-box input {
    background: transparent;
    border: none;
    outline: none;
    color: #fff;
    padding: 8px 15px;
    font-size: 14px;
    width: 200px;
}

.search-box input::placeholder {
    color: rgba(255,255,255,0.6);
}

.search-box button {
    background: none;
    border: none;
    color: #fff;
    cursor: pointer;
    font-size: 16px;
}

/* 标签栏 */
.header-tags {
    background: rgba(0,0,0,0.2);
    padding: 10px 0;
    margin-top: 10px;
}

.tags-grid {
    display: grid;
    grid-template-columns: repeat(13, 1fr);
    gap: 10px;
    padding: 5px 0;
}

.tags-grid .tag {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 5px 4px;
    text-decoration: none;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    min-width: 0;
}

/* ====== 不同 header 布局样式 ====== */

/* 布局2: 居中堆叠 */
.header-center-stack .container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
}
.header-center-stack .nav ul {
    justify-content: center;
}

/* 布局3: 左右分栏 */
.header-split-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.header-split-container {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 30px;
    align-items: center;
}
.header-split-left .nav ul {
    flex-direction: column;
    gap: 8px;
}
.header-split-right .tags-grid {
    grid-template-columns: repeat(10, 1fr);
}

/* 布局4: 极简反转 */
.header-banner-area {
    padding: 15px 0;
}
.header-banner-area .banner {
    margin-bottom: 0;
}

/* 布局5: 搜索置顶 */
.header-search-top {
    padding: 10px 0;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}
.header-search-top .search-box {
    justify-content: center;
    display: flex;
}
.header-search-top .search-box form {
    max-width: 600px;
    width: 100%;
}

/* 布局6: 标签前置 */
.header-nav-area {
    padding: 10px 0;
    border-top: 1px solid rgba(255,255,255,0.1);
}
.header-nav-area .nav ul {
    justify-content: center;
    flex-wrap: wrap;
}

/* 布局7: 三段式 */
.header-logo-center .container {
    text-align: center;
}
.header-logo-center .logo {
    display: inline-block;
}
.header-nav-row {
    border-top: 1px solid rgba(255,255,255,0.1);
    border-bottom: 1px solid rgba(255,255,255,0.1);
    padding: 10px 0;
}
.header-nav-row .nav ul {
    justify-content: center;
    flex-wrap: wrap;
}
.header-search-row {
    padding: 10px 0;
}
.header-search-row .search-box {
    justify-content: center;
    display: flex;
}
.header-search-row .search-box form {
    max-width: 500px;
    width: 100%;
}

/* 横幅区域 */
.banner {
    background: linear-gradient(135deg, #4ecdc4 0%, #44a08d 50%, #093637 100%);
    color: #fff;
    padding: 20px 0;
    text-align: center;
    margin-bottom: 30px;
	border-radius: 5px;
}


/* 宫格布局 */
.banner-grid {
    display: grid;
    grid-template-columns: repeat(10, 1fr);
    gap: 12px;
    max-width: 100%;
    margin: 0 auto;
    padding: 0 20px;
}


.banner-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 10px 8px;
    background: rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 10px;
    text-decoration: none;
    color: #fff;
    font-size: 13px;
    font-weight: 500;
    transition: all 0.3s ease;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    text-align: center;
    min-width: 0;
}

.banner-btn:hover {
    background: rgba(255, 255, 255, 0.35);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.banner-stats {
    display: flex;
    justify-content: center;
    gap: 30px;
    font-size: 16px;
    margin-top: 25px;
}

.banner-stats span {
    background: rgba(255,255,255,0.2);
    padding: 10px 20px;
    border-radius: 25px;
}


.tag {
    background: rgba(255,255,255,0.15);
    color: #fff;
    padding: 5px 8px;
    border-radius: 20px;
    font-size: 13px;
    cursor: pointer;
    text-align: center;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    transition: all 0.3s ease;
    min-width: 0;
}

.tag:hover {
    background: #4ecdc4;
    color: #1a1a2e;
}

/* 底部标签宫格布局 */
.footer-tag {
    display: grid;
    grid-template-columns: repeat(13, 1fr);
    gap: 10px;
    padding: 20px;
    max-width: 1400px;
    margin: 0 auto;
}

.footer-tag .tag {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 8px 4px;
    text-align: center;
    text-decoration: none;
    font-size: 12px;
    background: rgba(255,255,255,0.1);
    border: 1px solid rgba(255,255,255,0.2);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    min-width: 0;
}

.footer-tag .tag:hover {
    background: #4ecdc4;
    color: #1a1a2e;
    transform: translateY(-2px);
}

/* 主内容区 */
.main {
    padding: 10px 0;
}

/* 视频卡片 */
.video-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-top: 20px;
}

.video-card {
    background: #fff;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
    transition: all 0.3s ease;
}

.video-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.video-card-image {
    position: relative;
    height: 160px;
    overflow: hidden;
}

.video-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.video-card:hover .video-card-image img {
    transform: scale(1.05);
}

.video-card-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.video-card:hover .video-card-overlay {
    opacity: 1;
}

.video-card-overlay img {
    width: 40px;
    height: 40px;
    background: rgba(255,255,255,0.9);
    border-radius: 50%;
    padding: 8px;
    cursor: pointer;
}

.video-card-link {
    display: block;
    text-decoration: none;
    color: inherit;
}

.video-card-info {
    padding: 12px;
}

.video-card-title {
    font-size: 14px;
    font-weight: 600;
    color: #333;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 8px;
}

.video-card-meta {
    display: flex;
    justify-content: space-between;
    font-size: 12px;
    color: #999;
}

/* 分类标题 */
.section-title {
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 30px 0 20px;
    font-size: 20px;
    font-weight: 700;
    color: #fff;
}

.section-title::before {
    content: '';
    width: 4px;
    height: 20px;
    background: linear-gradient(180deg, #4ecdc4, #44a08d);
    border-radius: 2px;
}

/* 页脚 */
.footer {
    background: #1a1a2e;
    color: #fff;
    padding: 40px 0 20px;
    margin-top: 40px;
}

.footer-content {
    margin-bottom: 30px;
	text-align: center;
}

.footer-section h4 {
    margin-bottom: 15px;
    color: #4ecdc4;
}

.footer-section ul {
    list-style: none;
}

.footer-section li {
    margin-bottom: 10px;
}

.footer-section a {
    color: rgba(255,255,255,0.7);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: #4ecdc4;
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 20px;
    text-align: center;
    color: rgba(255,255,255,0.5);
    font-size: 13px;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .video-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (max-width: 768px) {
    .header-top .container {
        flex-wrap: nowrap;
        gap: 10px;
    }
	
	/* 平板端：banner 10列 */
	.banner-grid {
	    grid-template-columns: repeat(10, 1fr);
	    gap: 10px;
		padding: 0 5px;
	}
	
	.banner-btn {
	    padding: 12px 10px;
	    font-size: 13px;
	}
	
	.banner-stats {
	    flex-wrap: wrap;
	    gap: 15px;
	}
    
    .container {
        padding: 0 10px;
    }
    
    .nav {
        position: static;
        transform: none;
        flex: 1;
        text-align: center;
    }
    
    .nav ul {
        justify-content: center;
        gap: 15px;
    }
    
    .search-box input {
        width: 120px;
    }
    
    .video-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
    }
    
    .video-card-image {
        height: 140px;
    }
    
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
    
    /* 标签栏：平板端13列 */
    .tags-grid {
        grid-template-columns: repeat(13, 1fr);
        gap: 8px;
    }
    
    /* 底部标签：平板端13列 */
    .footer-tag {
        grid-template-columns: repeat(13, 1fr);
        gap: 8px;
        padding: 15px;
    }
    
    .footer-tag .tag {
        padding: 8px 6px;
        font-size: 12px;
    }
}

@media (max-width: 480px) {
    .nav {
        display: none;
    }
    
    .search-box input {
        width: 120px;
    }
    
    .video-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    /* 底部标签：移动端7列 */
    .footer-tag {
        grid-template-columns: repeat(7, 1fr);
        gap: 6px;
        padding: 10px;
    }
    
    .footer-tag .tag {
        padding: 6px 4px;
        font-size: 11px;
    }
    
    .video-card-image {
        height: 180px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    /* 移动端：banner 5列 */
    .banner-grid {
        grid-template-columns: repeat(5, 1fr);
        gap: 8px;
		padding: 0 5px;
    }
    
    .banner-btn {
        padding: 5px;
        font-size: 12px;
        border-radius: 5px;
    }
    
    /* 标签栏：移动端7列 */
    .tags-grid {
        grid-template-columns: repeat(7, 1fr);
        gap: 6px;
    }
    
    .tags-grid .tag {
        padding: 4px 6px;
        font-size: 11px;
    }
    
    /* 移动端：布局3分栏改为纵向 */
    .header-split-container {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    .header-split-left .nav ul {
        flex-direction: row;
        flex-wrap: wrap;
    }
}