body, html {
  margin: 0;
  padding: 0;
  font-family: Arial, sans-serif;
  line-height: 1.6;
  background-color: #f9f9f9;
  color: #333;
}

.container {
  display: flex;
  flex-wrap: wrap;
  max-width: 1200px;
  margin: auto;
  padding: 20px;
}

.sidebar {
  flex: 1 1 250px;
  padding: 20px;
  background: #fff;
  margin-right: 20px;
  border-radius: 12px;
  box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

.avatar {
  width: 100%;
  max-width: 180px;
  border-radius: 50%;
  display: block;
  margin: 0 auto 10px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.2);
}

.sidebar h1 {
  text-align: center;
  margin-bottom: 5px;
}

.sidebar p {
  text-align: center;
}

.sidebar a {
  color: #0077cc;
  text-decoration: none;
}

.sidebar a:hover {
  text-decoration: underline;
}

.main {
  flex: 3 1 600px;
  background: #fff;
  padding: 20px;
  border-radius: 12px;
  box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

.main h2 {
  border-bottom: 2px solid #0077cc;
  padding-bottom: 5px;
  margin-top: 20px;
}

.news-list {
  list-style: none;
  padding-left: 0;
}

.news-list li {
  margin-bottom: 5px;
}

.paper {
  margin-bottom: 15px;
}

.title {
  font-weight: bold;
  color: #0077cc;
  cursor: pointer;
}

.title:hover {
  text-decoration: underline;
}

.abstract {
  display: none;
  margin-top: 5px;
  padding: 10px;
  background: #f0f0f0;
  border-left: 3px solid #0077cc;
  border-radius: 5px;
}