* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Microsoft YaHei', 'PingFang SC', sans-serif;
}
body {
    background-color: #f5f5f5;
    color: #333;
}
.header {
    background-color: #4d79bc;
    color: white;
    padding: 15px 20px;
    display: flex;
    align-items: center;
}
.header-image {
    width: 60px;
    height: 60px;
    margin-right: 15px;
    border-radius: 5px;
    object-fit: cover;
}
.header-text h1 {
    font-size: 24px;
    margin-bottom: 5px;
}
.header-text p {
    font-size: 14px;
    opacity: 0.9;
}
.navigation {
    display: flex;
    justify-content: space-between;
    padding: 15px 20px;
    background-color: white;
    border-bottom: 1px solid #e0e0e0;
}
.nav-link {
    color: #333;
    text-decoration: none;
    display: flex;
    align-items: center;
}
.nav-link:hover {
    color: #4d79bc;
}
.nav-icon {
    margin-right: 5px;
}
.collection-header {
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
}
.collection-title {
    font-size: 18px;
    font-weight: bold;
}
.sort-button {
    background: none;
    border: none;
    padding: 5px 10px;
    cursor: pointer;
    font-size: 14px;
}
.episode-list {
    padding: 0 20px;
    max-width: 1200px;
    margin: 0 auto;
}
.episode-card {
    margin-bottom: 15px;
    background-color: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}
.episode-content {
    display: flex;
    padding: 15px;
}
.episode-image {
    width: 180px;
    height: 100px;
    object-fit: cover;
    border-radius: 5px;
    margin-right: 15px;
    flex-shrink: 0;
}
.episode-details {
    flex-grow: 1;
}
.episode-header {
    display: flex;
    align-items: center;
    margin-bottom: 10px;
}
.episode-number {
    margin-right: 10px;
    font-weight: bold;
}
.episode-title {
    font-size: 16px;
    font-weight: bold;
}
.episode-meta {
    display: flex;
    align-items: center;
    margin-bottom: 10px;
    font-size: 14px;
}
.rating {
    background-color: #4d79bc;
    color: white;
    padding: 2px 8px;
    border-radius: 4px;
    margin-right: 10px;
    font-size: 12px;
}
.tag {
    background-color: #e0f2ff;
    color: #4d79bc;
    padding: 2px 8px;
    border-radius: 4px;
    margin-right: 10px;
    font-size: 12px;
}
.episode-date {
    color: #777;
    font-size: 12px;
    margin-right: 10px;
}
.episode-duration {
    color: #777;
    font-size: 12px;
}
.episode-description {
    font-size: 14px;
    line-height: 1.5;
    color: #555;
}
.expand-button {
    text-align: center;
    padding: 10px;
    color: #4d79bc;
    cursor: pointer;
    border-top: 1px solid #eee;
    font-size: 14px;
}
.expand-button:hover {
    background-color: #f5f5f5;
}
.footer {
    display: flex;
    justify-content: space-between;
    padding: 15px 20px;
    margin-top: 20px;
}
.back-to-top {
    text-align: right;
    padding: 15px 20px;
    color: #4d79bc;
    font-size: 14px;
}

.placeholder-img {
    width: 180px;
    height: 100px;
    background-color: #e0e0e0;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 5px;
    margin: 0 5px;
}

.episode-details{
    max-width: 900px;
}

.no-episodes {
    text-align: center;
    padding: 35px;
    font-size: 24px;
    color: #df0a0a;
}

/* 响应式布局 */
@media (max-width: 768px) {
    .episode-content {
        flex-direction: column;
    }
    .episode-image {
        width: 100%;
        height: 120px;
        margin-right: 0;
        margin-bottom: 10px;
    }
    .header-image {
        width: 50px;
        height: 50px;
    }
    .collection-header {
        flex-direction: column;
        align-items: flex-start;
    }
    .sort-button {
        margin-top: 10px;
    }
}

@media (max-width: 480px) {
    .episode-meta {
        flex-wrap: wrap;
    }
    .rating, .tag {
        margin-bottom: 5px;
    }
    .placeholder-img {
        width: 100%;
        height: 50px;
        margin-bottom: 5px;
    }
}