/* 导航栏样式 */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 16px 0;
  transition: all 0.4s ease;
  background: transparent;
}

.header.scrolled {
  background: rgba(10, 14, 26, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(0, 240, 255, 0.1);
  padding: 12px 0;
}

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Logo区域 */
.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.logo img {
  height: 42px;
  width: auto;
}

.logo-text {
  display: flex;
  flex-direction: column;
}

.logo-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.5px;
  line-height: 1.3;
}

.logo-subtitle {
  font-size: 0.7rem;
  color: var(--text-muted);
  letter-spacing: 1px;
}

/* 导航菜单 */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 40px;
  list-style: none;
}

.nav-menu a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.3px;
  position: relative;
  padding: 8px 0;
  transition: color 0.3s ease;
}

.nav-menu a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-neon);
  transition: width 0.3s ease;
}

.nav-menu a:hover {
  color: var(--neon-cyan);
}

.nav-menu a:hover::after {
  width: 100%;
}

/* CTA按钮 */
.header-cta {
  display: flex;
  align-items: center;
  gap: 16px;
}

.header-cta .btn-neon {
  padding: 10px 24px;
  font-size: 0.85rem;
}

/* 移动端菜单按钮 */
.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  cursor: pointer;
  background: none;
  border: none;
}

.mobile-menu-btn span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: all 0.3s ease;
}

.mobile-menu-btn.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-btn.active span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* 移动端菜单 */
.mobile-menu {
  display: none;
  position: fixed;
  top: 70px;
  left: 0;
  right: 0;
  background: rgba(10, 14, 26, 0.98);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-glow);
  padding: 24px;
  transform: translateY(-100%);
  opacity: 0;
  transition: all 0.4s ease;
}

.mobile-menu.active {
  transform: translateY(0);
  opacity: 1;
}

.mobile-menu ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.mobile-menu a {
  color: var(--text-primary);
  font-size: 1rem;
  font-weight: 500;
  display: block;
  padding: 12px 0;
  border-bottom: 1px solid var(--border-subtle);
}

.mobile-menu a:hover {
  color: var(--neon-cyan);
}

/* 响应式 */
@media (max-width: 1024px) {
  .nav-menu {
    display: none;
  }
  
  .header-cta .btn-neon {
    display: none;
  }
  
  .mobile-menu-btn {
    display: flex;
  }
  
  .mobile-menu {
    display: block;
  }
}

@media (max-width: 480px) {
  .logo img {
    height: 36px;
  }
  
  .logo-title {
    font-size: 1rem;
  }
  
  .logo-subtitle {
    font-size: 0.6rem;
  }
}