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

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

/* 导航栏样式 */
.nav-wrapper {
    background: linear-gradient(to right, #8b0000, #b22222);
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

.nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: 15px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    color: #fff;
    font-size: 24px;
    font-weight: bold;
    text-decoration: none;
}

.nav-menu {
    display: flex;
    list-style: none;
}

.nav-menu li {
    margin-left: 30px;
}

.nav-menu a {
    color: #fff;
    text-decoration: none;
    font-size: 16px;
    transition: color 0.3s;
}

.nav-menu a:hover {
    color: #ffd700;
}

/* 内容区域样式 */
.container {
    max-width: 1200px;
    margin: 80px auto 0;
    padding: 20px;
}

/* 页面标题样式 */
.page-title {
    text-align: center;
    margin-bottom: 40px;
    color: #8b0000;
    font-size: 32px;
    position: relative;
}

.page-title::after {
    content: "";
    display: block;
    width: 60px;
    height: 3px;
    background-color: #8b0000;
    margin: 10px auto;
}

/* 卡片样式 */
.card {
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    padding: 20px;
    margin-bottom: 20px;
}

/* 图片样式 */
.img-fluid {
    max-width: 100%;
    height: auto;
    display: block;
    border-radius: 4px;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 10px 20px;
    background-color: #8b0000;
    color: #fff;
    text-decoration: none;
    border-radius: 4px;
    transition: background-color 0.3s;
}

.btn:hover {
    background-color: #b22222;
}

/* 网格布局 */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-bottom: 40px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .container {
        padding: 10px;
    }
    
    .page-title {
        font-size: 24px;
    }
}