/* 全局样式与渐变背景 */
body {
    margin: 0;
    font-family: 'Roboto', sans-serif;
    background: linear-gradient(135deg, #1A1A40, #2C3E50);
    color: #EAEAEA;
    line-height: 1.6;
}
h1, h2, h3 {
    font-family: 'Montserrat', sans-serif;
    color: #00FFC8;
}
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}
header {
    text-align: center;
    padding: 50px 20px;
    background: linear-gradient(135deg, #007BFF, #0056b3);
    color: white;
}
header h1 {
    font-size: 3rem;
    margin: 0;
}
.grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}
.grid-item {
    background: #2C3E50;
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}
.grid-item:hover {
    transform: translateY(-5px);
}
pre {
    background: #1A1A40;
    color: #00FFC8;
    padding: 15px;
    border-radius: 5px;
    overflow-x: auto;
}
table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
}
th, td {
    border: 1px solid #34495E;
    padding: 10px;
    text-align: left;
}
th {
    background: #2C3E50;
    color: #00FFC8;
}
.button {
    background-color: #007BFF;
    color: white;
    padding: 10px 20px;
    border: none;
    cursor: pointer;
    transition: transform 0.3s ease, background-color 0.3s ease;
    border-radius: 5px;
}
.button:hover {
    transform: scale(1.1);
    background-color: #0056b3;
}
.icon-circle {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: #FF9F00;
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 20px auto;
}
.icon-circle::before {
    content: "";
    width: 30px;
    height: 30px;
    background-color: white;
    border-radius: 50%;
}
img {
    max-width: 100%;
    height: auto;
    border-radius: 10px;
}
@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }
    .grid-container {
        grid-template-columns: 1fr;
    }
}