.header-crystal {
  background: linear-gradient(135deg, #1e3a8a, #6b21a8);
  padding: 35px 0;
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}
.header-crystal::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(45deg, rgba(255, 255, 255, 0.1), transparent, rgba(255, 255, 255, 0.1));
  animation: crystalShine 10s linear infinite;
}
.header-crystal .header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
}
.header-crystal .logo img {
  max-height: 70px;
  filter: drop-shadow(0 0 10px rgba(255, 255, 255, 0.6));
  transition: transform 0.4s ease;
}
.header-crystal .logo img:hover {
  transform: scale(1.1) rotateY(20deg);
}
.header-crystal .nav ul {
  display: flex;
  gap: 30px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.header-crystal .nav ul li a {
  font-size: 18px;
  font-weight: 600;
  color: #e0e0ff;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 15px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 8px;
  transition: all 0.4s ease;
  transform-style: preserve-3d;
  perspective: 1000px;
}
.header-crystal .nav ul li a:hover {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.2);
  transform: rotateX(10deg) translateZ(20px);
  box-shadow: 0 0 15px rgba(255, 255, 255, 0.4);
}
.header-crystal .nav ul li a i {
  transition: transform 0.4s ease;
}
.header-crystal .nav ul li a:hover i {
  transform: scale(1.2);
}
@keyframes crystalShine {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}