* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
}

body {
    background-color: #ffffff;
    color: #333;
    line-height: 1.6;
}

a {
    text-decoration: none;
    color: #255799;
    transition: color 0.3s;
}

a:hover {
    color: #1a3a6e;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

header {
    background-color: #fff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    position: sticky;
    top: 0;
    z-index: 100;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
}

.logo {
    font-size: 1.5rem;
    font-weight: 600;
    color: #333;
}

.nav-links {
    display: flex;
    list-style: none;
}

.nav-links li {
    margin-left: 30px;
}

.nav-links a {
    color: #555;
    font-weight: 500;
    padding: 8px 12px;
    position: relative;
    transition: all 0.3s ease;
}

.nav-links a:hover {
    background-color: #e6e6e6;
    color: #255799;
    transform: translateY(-2px);
}

.nav-links a.active {
    color: #255799;
}

.nav-links a.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: #255799;
}

main {
    padding: 60px 0;
    min-height: calc(100vh - 160px);
}

section {
    margin-bottom: 60px;
}

h1 {
    font-size: 2.2rem;
    margin-bottom: 30px;
    color: #222;
    font-weight: 600;
}

h2 {
    font-size: 1.8rem;
    margin-bottom: 20px;
    color: #333;
    font-weight: 500;
    padding-bottom: 10px;
    border-bottom: 1px solid #eee;
}

h3 {
    font-size: 1.4rem;
    margin: 25px 0 15px;
    color: #444;
}

.profile-section {
    display: flex;
    align-items: flex-start;
    gap: 40px;
    margin-bottom: 50px;
}

.profile-img {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    object-fit: cover;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
}

.profile-info {
    flex: 1;
}

.profile-name {
    font-size: 2rem;
    margin-bottom: 10px;
    color: #222;
}

.profile-title {
    font-size: 1.2rem;
    color: #255799;
    margin-bottom: 20px;
    font-weight: 500;
}

.bio {
    font-size: 1.1rem;
    line-height: 1.7;
    color: #555;
}

.activity-list {
    list-style: none;
}

.activity-item {
    margin-bottom: 25px;
    padding-bottom: 25px;
    border-bottom: 1px solid #f0f0f0;
}

.activity-item:last-child {
    border-bottom: none;
}

.activity-date {
    font-weight: 500;
    color: #255799;
    margin-bottom: 5px;
}

.activity-title {
    font-weight: 600;
    margin-bottom: 8px;
    font-size: 1.1rem;
}

.activity-desc {
    color: #666;
}

.publication-item {
    margin-bottom: 30px;
    padding-bottom: 30px;
    border-bottom: 1px solid #f0f0f0;
}

.publication-title {
    font-weight: 600;
    font-size: 1.2rem;
    margin-bottom: 8px;
    color: #222;
}

.publication-authors {
    font-style: italic;
    margin-bottom: 8px;
    color: #555;
}

.publication-venue {
    color: #255799;
    margin-bottom: 8px;
    font-weight: 500;
}

.publication-links {
    margin-top: 10px;
}

.publication-links a {
    margin-right: 15px;
    font-size: 0.9rem;
}

footer {
    background-color: #f9f9f9;
    padding: 40px 0;
    text-align: center;
    color: #666;
    border-top: 1px solid #eee;
}

.social-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 25px;
}

.social-button {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 15px;
    border-radius: 8px;
    background-color: white;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    width: 100px;
    text-decoration: none;
    color: #555;
}

.social-button:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.1);
    color: #255799;
}

.social-icon {
    font-size: 24px;
    margin-bottom: 8px;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.social-text {
    font-size: 0.9rem;
    font-weight: 500;
}

.contact-info {
    margin-bottom: 15px;
}

.copyright {
    font-size: 0.9rem;
}

@media (max-width: 768px) {
    .social-buttons {
        flex-wrap: wrap;
        gap: 15px;
    }
    
    .social-button {
        width: 80px;
        padding: 12px;
    }
}