/* Mobile Navigation Styles */
.mobile-menu-button {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  flex-direction: column;
  justify-content: space-around;
  width: 30px;
  height: 30px;
  padding: 0;
}

.mobile-menu-button .bar {
  width: 100%;
  height: 3px;
  background-color: var(--text);
  border-radius: 2px;
  transition: all 0.3s ease;
}

@media (max-width: 768px) {
  .mobile-menu-button {
    display: flex;
  }
  
  .header-inner {
    position: relative;
  }
  
  /* 移动端 logo 调整 */
  .desktop-logo {
    display: none; /* 在移动端隐藏桌面版 logo */
  }
  
  .mobile-logo {
    display: inline-block; /* 在移动端显示移动版 logo */
  }
  
  .brand {
    flex-shrink: 0; /* 防止 logo 被压缩 */
  }
  
  .nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--surface);
    border: 1px solid var(--line);
    border-top: none;
    box-shadow: 0 4px 12px rgba(15, 23, 42, 0.1);
    flex-direction: column;
    padding: 16px 0;
    z-index: 1000;
    gap: 0;
  }
  
  .nav.mobile-nav-open {
    display: flex;
  }
  
  .nav .nav-link {
    display: block;
    padding: 12px 20px;
    border-radius: 0;
    border: none;
    text-align: left;
    width: 100%;
    margin: 0;
  }
  
  .nav .nav-link:hover,
  .nav .nav-link.active {
    background: #f3f4f6;
  }
  
  /* 移动端语言选择器 */
  .mobile-lang-selector {
    margin: 10px 20px;
    border-top: 1px solid var(--line);
    padding-top: 10px;
  }
  
  .mobile-lang-selector .current-lang {
    justify-content: center;
    background: #f1f5f9;
  }
  
  .mobile-lang-selector .lang-dropdown {
    position: relative;
    width: 100%;
    margin-top: 8px;
    box-shadow: none;
    border: 1px solid var(--line);
  }
  
  .mobile-lang-selector .lang-option {
    justify-content: center;
  }
}

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

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

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