/* 基础样式 */
body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.container {
    max-width: 1440px;
    margin: 0 auto;
}

/* 轮播图样式 */
.carousel-container {
    position: relative;
    overflow: hidden;
}

.carousel-slide {
    opacity: 0;
    transition: opacity 1s ease-in-out;
}

.carousel-slide.active {
    opacity: 1;
}

.carousel-prev,
.carousel-next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 10;
    cursor: pointer;
}

.carousel-indicators {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 10;
}

.carousel-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.5);
    cursor: pointer;
}

.carousel-dot.active {
    background-color: #fff;
}

/* 视频卡片样式 */
.video-card {
    background-color: #1a1a1a;
    border-radius: 8px;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.video-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px -5px rgba(255, 193, 7, 0.1), 0 10px 10px -5px rgba(255, 193, 7, 0.04);
}

.play-button {
    transition: transform 0.3s ease;
    transform: scale(0);
}

.video-card:hover .play-button {
    transform: scale(1);
}

/* 分类卡片样式 */
.category-card {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.category-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px -5px rgba(255, 193, 7, 0.1), 0 10px 10px -5px rgba(255, 193, 7, 0.04);
}

/* 返回顶部按钮 */
#backToTop {
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s ease;
}

#backToTop.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

/* 导航栏滚动效果 */
header.scrolled {
    background-color: rgba(17, 24, 39, 0.95);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}