/* 继承主页的基础样式 */
body {
    margin: 0;
    padding: 0;
    font-family: "Microsoft YaHei", sans-serif;
    background: #f5f5f5;
}

/* 页头样式 */
header {
    background: #fff;
    padding: 20px 0;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.logo {
    width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.logo h1 {
    margin: 0;
    color: #333;
    font-size: 32px;
}

/* 导航样式 */
nav {
    width: 1200px;
    margin: 20px auto 0;
}

nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    justify-content: center;
}

nav li {
    margin: 0 20px;
}

nav a {
    color: #333;
    text-decoration: none;
    font-size: 16px;
    padding: 5px 10px;
}

nav a:hover,
nav a.active {
    color: #e74c3c;
}

/* 内容区样式 */
main {
    width: 1200px;
    margin: 20px auto;
    padding: 20px;
    background: #fff;
    border-radius: 5px;
}

/* 筛选区样式 */
.filter {
    margin-bottom: 20px;
    padding: 15px;
    background: #f9f9f9;
    border-radius: 5px;
}

.filter-item {
    margin: 10px 0;
    display: flex;
    align-items: center;
}

.filter-item span {
    color: #666;
    margin-right: 15px;
}

.filter-item a {
    margin-right: 20px;
    color: #333;
    text-decoration: none;
}

.filter-item a.active {
    color: #e74c3c;
}

/* 书籍网格样式 */
.book-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-bottom: 30px;
}

.book-item {
    background: #fff;
    padding: 15px;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    transition: transform 0.3s;
}

.book-item:hover {
    transform: translateY(-5px);
}

.book-item img {
    width: 100%;
    height: 280px;
    object-fit: cover;
    border-radius: 5px;
}

.book-info {
    padding: 10px 0;
}

.book-info h3 {
    margin: 10px 0;
    font-size: 16px;
    color: #333;
}

.author {
    color: #666;
    font-size: 14px;
    margin: 5px 0;
}

.desc {
    color: #999;
    font-size: 14px;
    margin: 5px 0;
    height: 40px;
    overflow: hidden;
}

.price {
    color: #e74c3c;
    font-size: 18px;
    font-weight: bold;
    margin: 10px 0;
}

/* 分页样式 */
.pagination {
    display: flex;
    justify-content: center;
    margin-top: 30px;
}

.pagination a,
.pagination span {
    margin: 0 5px;
    padding: 8px 12px;
    color: #333;
    text-decoration: none;
    border-radius: 3px;
}

.pagination a:hover,
.pagination a.active {
    background: #e74c3c;
    color: #fff;
}

/* 页脚样式 */
footer {
    background: #333;
    color: #fff;
    padding: 30px 0;
    text-align: center;
    margin-top: 50px;
}

.footer-nav {
    margin-bottom: 20px;
}

.footer-nav a {
    color: #fff;
    text-decoration: none;
    margin: 0 10px;
}

.copyright {
    font-size: 14px;
    color: #999;
}