body {
    margin: 0;
    padding: 0;
    min-height: 100vh;
    background-image: url('images.jpeg'); /* 替换为您的背景图片路径 */
    background-size: cover;
    background-position: center;
    font-family: Arial, sans-serif;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;!!
}

.search-box {
    padding: 10px;
    border-radius: 5px;
    margin-bottom: 20px;
}

.search-box input {
    width: 100%;
    padding: 8px;
    border: 1px solid #ddd;
    border-radius: 4px;
}

.title-bar {
    padding: 15px;
    border-radius: 5px;
    margin-bottom: 20px;
}

.cards-container {
    display: grid;
    grid-template-columns: repeat(5, 1fr) 2fr 2fr;
    gap: 15px;
}

.small-card {
    background: white;
    height: 80px;
    border-radius: 5px;
}

.large-card {
    background: white;
    height: 120px;
    border-radius: 5px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
}

.navbar {
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 40px 0;
    margin-top: 20px;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 15px 20px;
}

.nav-links {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(2, auto);  /* 保持两列 */
    grid-template-rows: repeat(3, auto);     /* 改为三行 */
    gap: 40px 200px;  /* 增加列间距到200px，让布局更宽松 */
    justify-content: center;
    margin: 0;
    padding: 0;
}

.nav-links li {
    margin: 0;
}

.nav-links a {
    background: #f0f0f0;
    text-decoration: none;
    color: #333;
    font-weight: 500;
    padding: 30px 80px;  /* 增加内边距使按钮更大 */
    border-radius: 6px;
    transition: all 0.3s ease;
    font-size: 28px;
    display: inline-block;
    text-align: center;
    min-width: 250px;  /* 增加最小宽度 */
}

.nav-links a:hover {
    background: #e5e5e5;
    transform: translateY(-2px);
}

.nav-links a.active {
    background: #007bff;
    color: white;
}

.container {
    padding-top: 30px;
}

.main-content {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: calc(100vh - 400px); /* 减去导航栏和简介的高度 */
    padding: 20px;
}

.qr-container {
    display: flex;
    gap: 40px;  /* 二维码之间的间距 */
    justify-content: center;
    align-items: center;
}

.qr-code {
    background: white;
    padding: 15px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    text-align: center;
    transition: transform 0.3s ease;
}

.qr-code:hover {
    transform: scale(1.05);
}

.qr-code img {
    width: 180px;  /* 稍微增大二维码尺寸 */
    height: 220px;
    display: block;
    margin-bottom: 10px;
}

.qr-code p {
    margin: 0;
    color: #333;
    font-size: 16px;
    font-weight: 500;
}

.top-intro {
    background: rgba(255, 255, 255, 0.95);
    border-bottom: 1px solid #eee;
    padding: 40px 0;
    position: relative;
    z-index: 1001;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.intro-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    text-align: center;
}

.intro-container p {
    margin: 0;
    color: #333;
    font-size: 24px;
    line-height: 1.5;
    font-weight: 300;
    max-width: 800px;
    margin: 0 auto;
}

.top-box {
    width: 350px;
    height: 100px;
    font-size:28px;
    font-weight: 500;
    line-height:100px;
    background: #007bff;
    color: #fff;    
    padding: 0 60px;
    margin: 0 auto;
    margin-bottom: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}