body {
  margin: 0;
  font-family: Arial, sans-serif;
}

/* **********************Header********************** */
.header {
  background-image: url('images/Hong-Kong-2.jpg'); 
  background-size: cover;
  background-position: center;
  height: 400px;
  position: relative;
}

.info-box {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background-color: rgba(255, 255, 255, 0.8); 
  border-radius: 20px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
  display: flex;
  padding: 20px;
  width: 700px;
  max-width: 90%;
  align-items: center;
}

.info-box img {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  object-fit: cover;
  margin-right: 20px;
  border: 3px solid #ccc;
}

.info-text h1 {
  margin: 0;
  font-size: 24px;
}

.info-text p {
  margin: 5px 0;
  font-size: 20px;
  color: #444;
}
/* -------------------------------------------------- */

/* main text */
.main-container {
  max-width: 1200px;
  margin: 40px auto;
  padding: 0 20px;
}

.main-text h1{
  text-align: center;
  font-size: 40px;
  font-weight: noraml;
  margin-bottom: 0.5em;
}

.main-text h2{
  text-align: left;
  font-size: 35px;
}

.main-text p{
  text-align: justify;
  font-size: 20px;
}

a {
  color: #0000ff;
  text-decoration: underline;
}

a:hover {
  color: #0000cc;
  text-decoration: underline;
} 

/* *******************Social links******************* */
.social-links {
  display: flex;
  justify-content: start;
  flex-wrap: wrap;
  gap: 2px;
  margin-top: 30px;
}

.social-links a {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 15px;
  border-radius: 25px;
  background-color: var(--light-gray);
  color: var(--text-color);
  text-decoration: none;
  transition: var(--transition);
  font-weight: 500;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
  font-size: 0.9rem;
}

.social-links a:hover {
  background-color: var(--primary-color);
  color: blue;
  transform: translateY(-3px);
  box-shadow: var(--box-shadow);
}

.social-links a i {
  font-size: 1rem;
}
/* -------------------------------------------------- */

/* **************Publication highlights************** */
.publication-item {
  display: flex;
  flex-direction: column;
  background-color: var(--card-bg);
  border-radius: 12px;
  box-shadow: var(--box-shadow);
  overflow: hidden;
  margin-bottom: 50px;
  transition: var(--transition);
  border: 1px solid var(--border-color);
}

.publication-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
}

.publication-media {
  width: 100%;
  overflow: hidden;
}

.publication-media img {
  width: 100%;
  height: auto;
  display: block;
}

.publication-content {
  padding: 20px;
}

.publication-content p {
  font-size: 18px;
}

.publication-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-color);
  margin-bottom: 12px;
  line-height: 1.4;
}

.publication-authors {
  margin-bottom: 15px;
  color: var(--text-light);
  line-height: 1.6;
}

.publication-venue {
  font-style: italic;
  margin-bottom: 15px;
  color: var(--dark-gray);
}

.publication-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.publication-links a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  background-color: var(--light-gray);
  border-radius: 20px;
  color: var(--text-color);
  text-decoration: none;
  font-size: 0.95rem;
  transition: var(--transition);
  font-weight: 500;
}

.publication-links a:hover {
  background-color: var(--primary-color);
  color: blue;
  transform: translateY(-2px);
}

.publication-links a i {
  font-size: 1rem;
}
/* -------------------------------------------------- */

/* 响应式设计 */
@media (min-width: 768px) {
.profile-container {
  flex-direction: row-reverse;
  align-items: center;
  gap: 60px;
}

.bio-container {
  flex: 1;
  text-align: left;
}

.profile-image-container {
  flex: 0 0 430px;
}

.publication-item {
  flex-direction: row;
}

.publication-media {
  flex: 0 0 38%;
  max-width: 38%;
}

.publication-content {
  flex: 0 0 62%;
  max-width: 62%;
}
}

@media (max-width: 767px) {
.hamburger {
  display: block;
}

.nav-links {
  position: fixed;
  left: -100%;
  top: 70px;
  gap: 0;
  flex-direction: column;
  background-color: var(--header-bg);
  width: 100%;
  text-align: center;
  transition: 0.3s;
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
  padding: 20px 0;
}

.nav-links.active {
  left: 0;
}

.nav-links li {
  margin: 10px 0;
}

.hamburger.active .bar:nth-child(2) {
  opacity: 0;
}

.hamburger.active .bar:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.hamburger.active .bar:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}