.timeline-section {
  background: #f4f4f4;
  padding: 60px 20px;
  text-align: center;
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
.timeline-container {
  display: flex;
  overflow: hidden;
  position: relative;
  height: 500px;
  margin-bottom: 40px;
  width: 100%;
  max-width: 1000px;
  align-items: center;
  justify-content: center;
}
.timeline-slide {
  flex: 0 0 100%;
  max-width: 100%;
  opacity: 0;
  transition: opacity 0.5s ease-in-out;
  position: absolute;
  top: 0;
  left: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.timeline-slide.active {
  opacity: 1;
  position: relative;
}
.timeline-image {
  width: 50%;
  border-radius: 16px;
  box-shadow: 0 5px 20px rgba(0,0,0,0.1);
  margin-bottom: 20px;
}
.timeline-content {
  font-size: 16px;
  max-width: 600px;
  margin: 0 auto;
}
.timeline-content h2 {
  font-size: 28px;
  margin-bottom: 10px;
}
.timeline-content ul {
  list-style: none;
  padding: 0;
  color: #555;
}
.timeline-content ul li::before {
  content: "\2022 ";
  color: #ff6600;
  font-weight: bold;
}
.timeline-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
}
.timeline-years {
  display: flex;
  list-style: none;
  gap: 20px;
  margin: 0 20px;
  padding: 0;
  flex-wrap: wrap;
  justify-content: center;
}
.timeline-years li {
  font-weight: bold;
  font-size: 16px;
  cursor: pointer;
  color: #888;
  padding: 5px 10px;
  border-radius: 8px;
  transition: background 0.3s;
}
.timeline-years li.active {
  background: #ff6600;
  color: white;
}
.timeline-btn {
  background: transparent;
  border: none;
  font-size: 30px;
  cursor: pointer;
  color: #555;
  transition: color 0.3s;
}
.timeline-btn:hover {
  color: #ff6600;
}