/* 通用样式 */
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 0;
    background: linear-gradient(135deg, #1e1e2f, #28293e);
    color: #ffffff;
}

header {
    background: #1c1c3c;
    color: #ffffff;
    padding: 20px;
    text-align: center;
    box-shadow: 0px 4px 6px rgba(0, 0, 0, 0.3);
    animation: fadeIn 1s ease-in-out;
}

header h1 {
    margin: 0;
    font-size: 2.5em;
    letter-spacing: 1px;
}

header p {
    margin: 10px 0 0;
    font-size: 1.2em;
    color: #bbbbbb;
}

nav {
    background-color: #33334f;
    padding: 10px;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0px 4px 6px rgba(0, 0, 0, 0.3);
}

nav ul {
    list-style: none;
    display: flex;
    justify-content: center;
    margin: 0;
    padding: 0;
}

nav ul li {
    margin: 0 15px;
}

nav ul li a {
    color: #ffffff;
    text-decoration: none;
    font-weight: bold;
    transition: color 0.3s ease, transform 0.3s ease;
}

nav ul li a:hover {
    color: #ff9900;
    transform: scale(1.1);
}

main {
    padding: 20px;
    animation: fadeIn 1.5s ease-in-out;
}

section {
    margin-bottom: 20px;
    padding: 20px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    box-shadow: 0px 4px 6px rgba(0, 0, 0, 0.3);
    transition: transform 0.3s ease;
}

section:hover {
    transform: translateY(-5px);
}

section h2 {
    border-bottom: 2px solid #ff9900;
    padding-bottom: 5px;
    color: #ff9900;
}

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

ul li {
    margin: 10px 0;
}

ul li a {
    color: #00aaff;
    text-decoration: none;
    font-weight: bold;
    transition: color 0.3s ease;
}

ul li a:hover {
    color: #ff9900;
    text-decoration: underline;
}

footer {
    text-align: center;
    background-color: #1c1c3c;
    color: #bbbbbb;
    padding: 10px;
    margin-top: 20px;
    box-shadow: 0px -4px 6px rgba(0, 0, 0, 0.3);
}

footer p {
    margin: 0;
}

/* 动画效果 */
@keyframes fadeIn {
    0% {
        opacity: 0;
        transform: translateY(-20px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}