/* ====================================
   响应式头部样式 - 云南省能源局
   移动端菜单按钮和导航样式
   ==================================== */

/* 移动端汉堡菜单按钮 - 默认隐藏 */
.mobile-menu-toggle {
  display: none;
}

/* ========== 移动端样式 (max-width: 768px) ========== */
@media (max-width: 768px) {
  /* 显示汉堡菜单按钮 */
  .mobile-menu-toggle {
    display: flex !important;
    position: fixed !important;
    top: 12px !important;
    right: 12px !important;
    width: 48px !important;
    height: 48px !important;
    background: rgba(15, 90, 155, 0.95) !important;
    border-radius: 8px !important;
    z-index: 10001 !important;
    cursor: pointer !important;
    flex-direction: column !important;
    justify-content: center !important;
    align-items: center !important;
    gap: 5px !important;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3) !important;
    transition: all 0.3s ease !important;
    border: 2px solid rgba(255, 255, 255, 0.3) !important;
  }

  .mobile-menu-toggle:active {
    transform: scale(0.92) !important;
  }

  .mobile-menu-toggle span {
    display: block !important;
    width: 24px !important;
    height: 3px !important;
    background: #fff !important;
    border-radius: 2px !important;
    transition: all 0.3s ease !important;
  }

  /* 汉堡菜单激活状态 - X图标 */
  .mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px) !important;
  }

  .mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0 !important;
    transform: translateX(-20px) !important;
  }

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

  /* 遮罩层 */
  .mobile-nav-overlay {
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    right: 0 !important;
    bottom: 0 !important;
    background: rgba(0, 0, 0, 0.5) !important;
    z-index: 9999 !important;
    opacity: 0 !important;
    visibility: hidden !important;
    transition: opacity 0.3s ease, visibility 0.3s ease !important;
  }

  .mobile-nav-overlay.active {
    display: block !important;
    opacity: 1 !important;
    visibility: visible !important;
  }

  /* 阻止背景滚动 */
  body.mobile-menu-open {
    overflow: hidden !important;
    position: fixed !important;
    width: 100% !important;
    height: 100% !important;
  }
}

/* ========== 小屏优化 ========== */
@media (max-width: 480px) {
  .mobile-menu-toggle {
    width: 44px !important;
    height: 44px !important;
    top: 10px !important;
    right: 10px !important;
  }

  .mobile-menu-toggle span {
    width: 22px !important;
  }
}

/* ========== 超小屏优化 ========== */
@media (max-width: 375px) {
  .mobile-menu-toggle {
    width: 42px !important;
    height: 42px !important;
    gap: 4px !important;
  }

  .mobile-menu-toggle span {
    width: 20px !important;
    height: 2px !important;
  }
}

/* ========== 动画性能优化 ========== */
.mobile-menu-toggle,
.mobile-menu-toggle span,
.mobile-nav-overlay {
  will-change: transform, opacity;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
}

/* ========== 减少动画模式支持 ========== */
@media (prefers-reduced-motion: reduce) {
  .mobile-menu-toggle,
  .mobile-menu-toggle span,
  .mobile-nav-overlay {
    transition: none !important;
    animation: none !important;
  }
}

/* ========== 打印时隐藏 ========== */
@media print {
  .mobile-menu-toggle,
  .mobile-nav-overlay {
    display: none !important;
  }
}