.wt-container {
  max-width: 1200px;
  margin: 0 auto;
}
.wt-container h1 {
  font-size: 2.5em;
  color: #2d3748;
  margin-bottom: 40px;
  text-align: center;
  background: linear-gradient(152deg, #61b2ff 0%, #0f88c5 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.wt-tree {
  position: relative;
  margin-bottom: 60px;
}
.wt-level-1 {
  background: linear-gradient(135deg, #0394ac 0%, #041e6e 100%);
  color: white;
  padding: 20px 30px;
  border-radius: 15px;
  font-size: 1.5em;
  font-weight: bold;
  margin-bottom: 30px;
  box-shadow: 0 10px 30px rgba(102, 126, 234, 0.3);
  position: relative;
}
.wt-level-2 {
  margin-left: 40px;
  margin-bottom: 30px;
  position: relative;
}
.wt-level-2::before {
  content: '';
  position: absolute;
  left: -20px;
  top: 20px;
  width: 2px;
  height: calc(100% - 20px);
  background: linear-gradient(180deg, #667eea 0%, #764ba2 100%);
}
.wt-level-2-title {
  background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  color: white;
  padding: 15px 25px;
  border-radius: 12px;
  font-size: 1.2em;
  font-weight: 600;
  margin-bottom: 20px;
  box-shadow: 0 8px 20px rgba(79, 172, 254, 0.3);
  position: relative;
  display: inline-block;
  min-width: 200px;
}
.wt-level-2-title::before {
  content: '';
  position: absolute;
  left: -20px;
  top: 50%;
  transform: translateY(-50%);
  width: 20px;
  height: 2px;
  background: linear-gradient(90deg, #667eea 0%, #4facfe 100%);
}
.wt-level-3 {
  margin-left: 40px;
  margin-bottom: 20px;
  position: relative;
}
.wt-level-3::before {
  content: '';
  position: absolute;
  left: -20px;
  top: 0;
  width: 2px;
  height: 100%;
  background: linear-gradient(180deg, #4facfe 0%, #00f2fe 100%);
}
.wt-level-3-item {
  background: white;
  border: 2px solid #e2e8f0;
  border-radius: 10px;
  padding: 15px 20px;
  margin-bottom: 15px;
  position: relative;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
  display: flex;
  align-items: flex-start;
  gap: 15px;
}
.wt-level-3-item:hover {
  border-color: #4facfe;
  transform: translateX(5px);
  box-shadow: 0 8px 25px rgba(79, 172, 254, 0.2);
}
.wt-level-3-item::before {
  content: '';
  position: absolute;
  left: -20px;
  top: 25px;
  width: 20px;
  height: 2px;
  background: linear-gradient(90deg, #4facfe 0%, #00f2fe 100%);
}
.wt-level-3-item::after {
  content: '';
  position: absolute;
  left: -24px;
  top: 21px;
  width: 8px;
  height: 8px;
  background: #4facfe;
  border-radius: 50%;
  border: 2px solid white;
  box-shadow: 0 2px 8px rgba(79, 172, 254, 0.4);
}
.wt-item-thumbnail {
  width: 80px;
  height: 80px;
  border-radius: 8px;
  object-fit: cover;
  flex-shrink: 0;
  border: 2px solid #e2e8f0;
  background: #f7fafc;
}
.wt-item-content {
  flex: 1;
}
.wt-item-name {
  font-weight: 600;
  color: #2d3748;
  margin-bottom: 8px;
  font-size: 1.05em;
  display: flex;
  align-items: center;
}
.wt-item-name::before {
  content: '▶';
  color: #4facfe;
  margin-right: 10px;
  font-size: 0.8em;
}
.wt-item-description {
  color: #718096;
  font-size: 0.95em;
  line-height: 1.6;
  padding-left: 20px;
  border-left: 3px solid #e2e8f0;
  margin-left: 10px;
}
@media (max-width: 768px) {
  /* .wt-container {
    padding: 20px;
  } */
  h1 {
    font-size: 1.8em;
  }
  .wt-level-2,
  .wt-level-3 {
    margin-left: 20px;
  }
  .wt-level-2-title {
    font-size: 1em;
  }
  .wt-level-3-item {
    flex-direction: column;
  }
  .wt-item-thumbnail {
    width: 100%;
    height: 190px;
  }
}
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
.wt-level-2 {
  opacity: 0;
}
.wt-level-2.wt-animate {
  animation: fadeInUp 0.6s ease forwards;
}
.wt-level-2:nth-child(1).wt-animate {
  animation-delay: 0.1s;
}
.wt-level-2:nth-child(2).wt-animate {
  animation-delay: 0.2s;
}
.wt-level-2:nth-child(3).wt-animate {
  animation-delay: 0.3s;
}
.wt-level-2:nth-child(4).wt-animate {
  animation-delay: 0.4s;
}
.wt-level-2:nth-child(5).wt-animate {
  animation-delay: 0.5s;
}

@media (max-width: 480px) {
  .wt-container h1 {
    font-size: 1.6rem;
  }
}