/* 全局样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: "Microsoft YaHei", sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
}

/* 页头样式 */
header {
    background-color: #fff;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    padding: 1rem 0;
}

.logo {
    display: flex;
    align-items: center;
    padding: 0 2rem;
}

.logo img {
    width: 60px;
    height: 60px;
    margin-right: 1rem;
}

.logo h1 {
    color: #ff6b6b;
    font-size: 2rem;
}

/* 导航栏样式 */
nav {
    background-color: #ff6b6b;
    padding: 1rem 0;
}

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

nav > ul > li {
    display: inline-block;
    position: relative;
}

nav a {
    color: #fff;
    text-decoration: none;
    font-size: 1.1rem;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    transition: all 0.3s ease;
}

nav a:hover {
    background-color: #ff8787;
}

nav a.login-btn {
    background-color: #fff;
    color: #ff6b6b;
    padding: 0.5rem 1.5rem;
    border-radius: 20px;
    font-weight: 500;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

nav a.login-btn:hover {
    background-color: #f8f9fa;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

/* 焦点图样式 */
.banner {
    width: 100%;
    height: 400px;
    overflow: hidden;
}

.banner img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* 内容区样式 */
main {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1rem;
}

section {
    background-color: #fff;
    border-radius: 8px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

section h2 {
    color: #ff6b6b;
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid #ff6b6b;
}

/* 宠物列表样式 */
.pet-list, .product-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.pet-item, .product-item {
    text-align: center;
}

.pet-item img, .product-item img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 8px;
    margin-bottom: 1rem;
}

.pet-item h3, .product-item h3 {
    color: #333;
    margin-bottom: 0.5rem;
}

/* 护理知识和新闻样式 */
.care-list, .news-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
}

article {
    display: flex;
    flex-direction: column;
}

article img {
    width: 100%;
    height: 250px;
    object-fit: cover;
    border-radius: 8px;
    margin-bottom: 1rem;
}

article h3 {
    color: #333;
    margin-bottom: 0.5rem;
}

/* 页脚样式 */
footer {
    background-color: #333;
    color: #fff;
    padding: 2rem 0;
    margin-top: 3rem;
}

.footer-nav {
    text-align: center;
    margin-bottom: 1rem;
}

.footer-nav a {
    color: #fff;
    text-decoration: none;
    margin: 0 1rem;
    transition: color 0.3s;
}

.footer-nav a:hover {
    color: #ff6b6b;
}

.copyright {
    text-align: center;
    padding-top: 1rem;
    border-top: 1px solid #555;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .logo {
        flex-direction: column;
        text-align: center;
    }

    nav ul {
        flex-direction: column;
        align-items: center;
    }

    .banner {
        height: 300px;
    }

    .pet-list, .product-list, .care-list, .news-list {
        grid-template-columns: 1fr;
    }
}

/* 下拉菜单样式 */
.submenu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background-color: #fff;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
    min-width: 150px;
    z-index: 1000;
}

.submenu li {
    display: block;
}

.submenu li a {
    padding: 10px 15px;
    display: block;
    color: #333;
    text-decoration: none;
    white-space: nowrap;
}

/* 鼠标悬停效果 */
nav > ul > li:hover .submenu {
    display: block;
}

.submenu li a:hover {
    background-color: #f5f5f5;
}