body {
    font-family: 'Arial', sans-serif; 
    margin: 0;
    padding: 0;
    background-image: url('../image/beijing.jpg'); 
    background-size: cover; 
    background-position: center; 
    background-attachment: fixed; 
    color: #333; 
}

header {
    text-align: center;
    padding: 20px;
    background: rgba(255, 255, 255, 0.8); 
    border-bottom: 1px solid #ccc;
}

.img {
    width: 100px; 
    height: auto; 
}

nav ul {
    list-style-type: none; 
    padding: 0;
}

nav ul li {
    display: inline;
    margin: 0 15px; 
}

nav a {
    text-decoration: none; 
    color: #007BFF; 
}

nav a:hover {
    text-decoration: underline; 
}

section {
    background: rgba(255, 255, 255, 0.9); 
    margin: 20px; 
    padding: 20px; 
    border-radius: 8px; 
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1); 
}

footer {
    text-align: center;
    padding: 10px 0;
    background: rgba(255, 255, 255, 0.8); 
    border-top: 1px solid #ccc;
}
.jieshao{
    color: #007BFF;
}
body {
    font-family: 'Arial', sans-serif; 
    margin: 0;
    padding: 0;
    background-image: url('../image/beijing.jpg'); 
    background-size: cover; 
    background-position: center; 
    background-attachment: fixed; 
    color: #333; 
}

header {
    text-align: center;
    padding: 20px;
    background: rgba(255, 255, 255, 0.8); 
    border-bottom: 1px solid #ccc;
}

.img {
    width: 100px; 
    height: auto; 
}

nav ul {
    list-style-type: none; 
    padding: 0;
}

nav ul li {
    display: inline;
    margin: 0 15px; 
}

nav a {
    text-decoration: none; 
    color: #007BFF; 
}

nav a:hover {
    text-decoration: underline; 
}

section {
    background: rgba(255, 255, 255, 0.9); 
    margin: 20px; 
    padding: 20px; 
    border-radius: 8px; 
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1); 
}

h2 {
    color: #333; 
}

h3 {
    color: #007BFF; 
}

footer {
    text-align: center;
    padding: 10px 0;
    background: rgba(255, 255, 255, 0.8); 
    border-top: 1px solid #ccc;
}