body {
    font-family: 'Arial', sans-serif;
    background-color: #f4f4f4;
    color: #333;
    margin: 0;
    padding: 0;
}

header {
    background-color: #222;
    padding: 15px 0;
    text-align: center;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

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

header nav ul li {
    display: inline;
    margin: 0 20px;
}

header nav ul li a {
    color: #fff;
    text-decoration: none;
    font-weight: bold;
    transition: color 0.3s;
}

header nav ul li a:hover {
    color: #f39c12;
}

.hero {
    background-color: #555;
    color: #fff;
    padding: 60px 20px;
    text-align: center;
    background-size: cover;
    background-position: center;
    position: relative;
}

.hero::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
}

.hero h1,
.hero p {
    font-size: 2.5rem;
    margin: 0;
    color: #fff; /* 白色字体 */
    text-shadow: 0 0 20px rgba(0, 0, 0, 0.7);
}

section {
    padding: 40px;
    margin: 20px auto;
    background-color: #fff;
    border-radius: 10px;
    max-width: 800px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
}

h2 {
    font-size: 2rem;
    color: #333;
    margin-bottom: 20px;
}

p, ol, ul {
    font-size: 1.2rem;
    line-height: 1.6;
    color: #555;
}

ol li, ul li {
    margin-bottom: 10px;
}

a {
    color: #f39c12;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

pre {
    background-color: #f4f4f4;
    padding: 15px;
    border-radius: 5px;
    overflow-x: auto;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

.tutorial-img {
    max-width: 100%;
    height: auto;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    margin-top: 20px;
}

footer {
    background-color: #222;
    color: #fff;
    text-align: center;
    padding: 10px 0;
    width: 100%;
    box-shadow: 0 -4px 6px rgba(0, 0, 0, 0.1);
    position: relative;
}