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

body {
    font-family: 'Arial', sans-serif;
    background-color: #ffffff;
    color: #333;
    line-height: 1.6;
}

/* 导航栏样式 */
.navbar {
    background-color: #6a0dad; /* 紫色 */
    color: white;
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 2rem;
}

.nav-logo {
    font-size: 1.6rem;
    font-weight: bold;
}

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

.nav-item {
    margin-left: 2rem;
}

.nav-link {
    color: white;
    text-decoration: none;
    font-size: 1.1rem;
    transition: color 0.3s;
}

.nav-link:hover {
    color: #d8bfd8; /* 浅紫色 */
}

/* 大标题区域样式 */
.hero {
    height: 40vh; /* 占页面高度40% */
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background-color: white;
    color: #333;
    text-align: center;
    padding: 2rem;
    position: relative;
    z-index: 2;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.2rem;
    max-width: 600px;
}

/* 主要内容区域样式 */
.main-content {
    max-width: 1200px;
    margin: 4rem auto; /* 向下移动卡片栏 */
    padding: 0 2rem;
}

.cards-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
}

/* 卡片样式 */
.card {
    background-color: white;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    position: relative;
    z-index: 1;
    min-height: 400px; /* 增加卡片高度 */
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: 0 12px 20px rgba(0, 0, 0, 0.15);
}

.card-header {
    padding: 1.5rem;
    border-bottom: 1px solid #eee;
}

.card-title {
    font-size: 1.5rem;
    color: #333;
}

.card-body {
    padding: 1.5rem;
}

.card-description {
    margin-bottom: 1rem;
    color: #666;
    min-height: 100px;
}

.card-details {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.detail-item {
    display: flex;
    flex-direction: column;
}

.detail-label {
    font-size: 0.8rem;
    color: #999;
    text-transform: uppercase;
}

.detail-value {
    font-weight: bold;
    color: #333;
}

.card-footer {
    padding: 1.5rem;
    text-align: center;
    border-top: 1px solid #eee;
}

.card-button {
    background-color: #6a0dad; /* 紫色 */
    color: white;
    border: none;
    padding: 0.8rem 1.5rem;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1rem;
    transition: background-color 0.3s;
    text-decoration: none; /* 去掉下划线 */
    display: inline-block; /* 保持按钮样式 */
}

.card-button:hover {
    background-color: #8a2be2; /* 深紫色 */
}

/* 穿插效果 */
.hero::after {
    content: "";
    position: absolute;
    bottom: -25px;
    left: 10%;
    width: 80%;
    height: 2px;
    background-color: #6a0dad; /* 紫色 */
    z-index: 1;
}

/* 页脚样式 */
.footer {
    background-color: #f5f5f5;
    padding: 2rem 0;
    margin-top: 3rem;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
    padding: 0 2rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
    }
    
    .nav-menu {
        margin-top: 1rem;
    }
    
    .nav-item {
        margin: 0 1rem;
    }
    
    .hero {
        height: 30vh; /* 响应式hero高度 */
        padding: 1rem;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero p {
        font-size: 1rem;
    }
    
    .cards-container {
        grid-template-columns: 1fr;
    }
    
    .main-content {
        margin: 3rem auto; /* 响应式卡片栏位置 */
    }
    
    .card {
        min-height: 250px; /* 响应式卡片高度 */
    }
}