body {
  font-family: 'Segoe UI', sans-serif;
  background: linear-gradient(to bottom, #e6f2ff, #ffffff); /* 天蓝过渡背景 */
  color: #003366;
  margin: 0;
}

.navbar, .quarto-title-block {
  background-color: #d0e7ff !important;
  box-shadow: 0px 2px 6px rgba(0, 0, 0, 0.1);
  z-index: 1000;
}

.navbar-brand {
  font-weight: bold;
  font-size: 1.3em;
  color: #005b99 !important;
}

.navbar-nav .nav-link {
  color: #003366 !important;
}

.navbar-nav .nav-link:hover {
  color: #007acc !important;
  font-weight: 600;
}

h1, h2, h3 {
  color: #003366;
}

.profile-pic {
  width: 200px;
  border-radius: 50%;
  box-shadow: 0 0 20px rgba(0, 123, 255, 0.4), 0 0 40px rgba(0, 123, 255, 0.15);
  transition: transform 0.3s ease;
}
.profile-pic:hover {
  transform: scale(1.05);
}

.cta-button {
  margin-top: 15px;
  padding: 10px 20px;
  background-color: #007acc;
  color: #fff;
  text-decoration: none;
  border-radius: 8px;
  transition: background 0.3s ease;
}

.cta-button:hover {
  background-color: #005b99;
}

.subtitle {
  font-size: 1.2em;
  font-weight: 400;
  color: #333;
  margin-top: 15px;
}
.animate-section {
  opacity: 0;
  transform: translateY(30px);
  animation: fadeSlideIn 1s ease-out forwards;
  animation-delay: 0.3s;
}

@keyframes fadeSlideIn {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.projects-section {
  opacity: 0;
  transform: translateY(40px);
  animation: slideFadeIn 1s ease-out forwards;
  animation-delay: 0.3s;
}

@keyframes slideFadeIn {
  from {
    opacity: 0;
    transform: translateY(40px);
  }
  to {
    opacity: 1;
    transform: translateY(0px);
  }
}

.project-item {
  opacity: 0;
  transform: translateY(20px);
  margin-bottom: 20px;
  transition: all 0.6s ease;
}

.fade-in-delayed-1 {
  animation: itemFadeIn 0.8s ease-out 0.6s forwards;
}
.fade-in-delayed-2 {
  animation: itemFadeIn 0.8s ease-out 0.9s forwards;
}
.fade-in-delayed-3 {
  animation: itemFadeIn 0.8s ease-out 1.2s forwards;
}

@keyframes itemFadeIn {
  to {
    opacity: 1;
    transform: translateY(0px);
  }
}