/* 基础样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body {
    font-family: 'Roboto', sans-serif;
    background: radial-gradient(circle, #032B44, transparent);
    color: #FFFFFF;
    line-height: 1.6;
    padding: 20px;
}
header {
    text-align: center;
    padding: 40px 0;
    background: rgba(26, 115, 232, 0.8);
    border-radius: 15px;
    margin-bottom: 30px;
}
header h1 {
    font-size: 2.5em;
    margin-bottom: 10px;
}
header p {
    font-size: 1.2em;
    color: #FFD700;
}
nav {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 40px;
    background: rgba(255, 255, 255, 0.2);
    padding: 15px;
    border-radius: 10px;
}
nav a {
    color: #FFFFFF;
    text-decoration: none;
    font-size: 1em;
    position: relative;
}
nav a::after {
    content: '';
    display: block;
    width: 0%;
    height: 2px;
    background: #FFD700;
    transition: width 0.3s;
    position: absolute;
    bottom: -5px;
    left: 0;
}
nav a:hover::after {
    width: 100%;
}
.container {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    margin-bottom: 40px;
}
.card {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 15px;
    padding: 20px;
    flex: 1 1 calc(33.333% - 40px);
    box-shadow: 0 4px 10px rgba(0,0,0,0.3);
    transition: transform 0.3s, box-shadow 0.3s;
}
.card:hover {
    transform: translateY(-10px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.5);
}
.card img {
    width: 100%;
    height: auto;
    border-radius: 10px;
    margin-bottom: 15px;
}
.card h3 {
    margin-bottom: 10px;
    color: #FFD700;
}
.card p {
    font-size: 0.95em;
    color: #FFFFFF;
}
.example-section {
    background: rgba(0, 0, 0, 0.5);
    padding: 30px;
    border-radius: 15px;
    margin-bottom: 40px;
}
.example-section h2 {
    color: #FFD700;
    margin-bottom: 20px;
}
.example-section article {
    background: rgba(255, 255, 255, 0.1);
    padding: 20px;
    border-radius: 10px;
}
.example-section pre {
    background: rgba(0, 0, 0, 0.7);
    padding: 15px;
    border-radius: 8px;
    overflow-x: auto;
    margin-bottom: 20px;
}
.example-section code {
    color: #FFD700;
    font-family: 'Courier New', Courier, monospace;
}
.footer {
    text-align: center;
    padding: 20px;
    background: rgba(26, 115, 232, 0.8);
    border-radius: 15px;
}
.footer p {
    color: #FFFFFF;
    font-size: 1em;
}
@media (max-width: 1440px) {
    .card {
        flex: 1 1 calc(33.333% - 40px);
    }
}
@media (max-width: 1200px) {
    .card {
        flex: 1 1 calc(50% - 40px);
    }
}
@media (max-width: 1024px) {
    .container {
        flex-direction: column;
    }
    .card {
        flex: 1 1 100%;
    }
}
@media (max-width: 768px) {
    header h1 {
        font-size: 2em;
    }
    nav {
        flex-direction: column;
        align-items: center;
    }
    .card {
        padding: 15px;
    }
}
@media (max-width: 480px) {
    header h1 {
        font-size: 1.5em;
    }
    nav a {
        font-size: 0.9em;
    }
    .card h3 {
        font-size: 1.1em;
    }
}
@media (max-width: 320px) {
    body {
        padding: 10px;
    }
    header h1 {
        font-size: 1.2em;
    }
    .card {
        padding: 10px;
    }
}