/* 导航栏样式 */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-light);
  z-index: 1000;
  transition: all 0.3s ease;
}

.navbar.scrolled {
  background: rgba(255, 255, 255, 0.98);
  box-shadow: var(--shadow-light);
}

.navbar-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

/* Logo */
.navbar-logo {
  display: flex;
  align-items: center;
  font-size: 24px;
  font-weight: 700;
  color: var(--primary-color);
  text-decoration: none;
}

.navbar-logo img {
  height: 40px;
  margin-right: 12px;
}

.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.logo-name {
  font-size: 24px;
  font-weight: 700;
  color: var(--primary-color);
}

.logo-subtitle {
  font-size: 11px;
  font-weight: 400;
  color: var(--text-secondary);
  margin-top: 2px;
}

/* 导航菜单 */
.nav-menu {
  display: flex;
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-item {
  margin: 0 8px;
}

.nav-link {
  display: block;
  padding: 12px 16px;
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 500;
  border-radius: var(--border-radius-md);
  transition: all 0.3s ease;
  position: relative;
}

.nav-link:hover,
.nav-link.active {
  color: var(--primary-color);
  background-color: rgba(255, 105, 0, 0.1);
}

/* 移动端菜单切换按钮 */
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  width: 30px;
  height: 30px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
}

.menu-toggle span {
  display: block;
  height: 3px;
  width: 100%;
  background-color: var(--text-primary);
  margin: 3px 0;
  transition: all 0.3s ease;
  border-radius: 2px;
}

.menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(6px, 6px);
}

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

.menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(6px, -6px);
}

/* 移动端响应式 */
@media (max-width: 768px) {
  .navbar-container {
    height: 60px;
  }

  .navbar-logo {
    font-size: 20px;
  }

  .navbar-logo img {
    height: 32px;
    margin-right: 8px;
  }

  .logo-name {
    font-size: 18px;
  }

  .logo-subtitle {
    font-size: 10px;
  }
  
  .menu-toggle {
    display: flex;
  }
  
  .nav-menu {
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    background: white;
    flex-direction: column;
    padding: 20px 0;
    box-shadow: var(--shadow-medium);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
  }
  
  .nav-menu.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  
  .nav-item {
    margin: 0;
    width: 100%;
  }
  
  .nav-link {
    padding: 16px var(--container-padding);
    border-radius: 0;
    border-bottom: 1px solid var(--border-light);
  }
  
  .nav-link:last-child {
    border-bottom: none;
  }
}

@media (max-width: 480px) {
  .navbar-container {
    height: 56px;
  }
  
  .navbar-logo {
    font-size: 18px;
  }
  
  .navbar-logo img {
    height: 28px;
  }
  
  .nav-menu {
    top: 56px;
  }
}