body {
    margin: 0;
    font-family: 'Poppins', sans-serif;
    background: #0f172a;
    color: #e2e8f0;
}

.container {
    max-width: 900px;
    margin: auto;
}

header {
    text-align: center;
    padding: 60px 20px;
}

.profile-photo {
    width: 140px;
    height: 140px;
    border-radius: 50%;
    object-fit: cover;
    margin-bottom: 15px;
}

nav {
    text-align: center;
    margin-bottom: 30px;
}

nav a {
    color: #38bdf8;
    margin: 0 15px;
    text-decoration: none;
    font-weight: 500;
}

nav a:hover {
    color: white;
}

section {
    padding: 40px 20px;
}

h2 {
    border-bottom: 2px solid #38bdf8;
    display: inline-block;
    padding-bottom: 5px;
}

.card {
    background: #1e293b;
    padding: 20px;
    border-radius: 12px;
    margin-top: 20px;
    transition: 0.3s;
}

.card:hover {
    transform: translateY(-8px);
    background: #334155;
}

ul li {
    margin: 10px 0;
}

footer {
    text-align: center;
    padding: 30px;
    font-size: 14px;
    color: #94a3b8;
}

/* 动画 */

.fade-in {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeIn 1s ease forwards;
}

@keyframes fadeIn {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}