/* 修复移动端透明覆盖层导致的点击被拦截问题 */
@media (max-width: 991px) {
  /* 默认关闭态：不阻挡点击 */
  .mobile-nav-wrapper {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    visibility: hidden;
    pointer-events: none;
    z-index: 10000;
  }
  
  .mobile-nav-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-color: rgba(0, 0, 0, 0.5);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
    z-index: 10000;
  }

  .mobile-nav {
    position: fixed;
    top: 0;
    right: 0;
    width: 300px;
    height: 100vh;
    background-color: #ffffff;
    transform: translateX(100%);
    transition: transform 0.4s ease;
    z-index: 10001;
    padding: 80px 30px 30px;
    box-shadow: -2px 0 10px rgba(0, 0, 0, 0.1);
    overflow-y: auto;
  }

  /* 方案一：使用 body.mobile-nav-active 的页面 */
  .mobile-nav-active .mobile-nav-wrapper {
    visibility: visible;
    pointer-events: auto;
  }
  
  .mobile-nav-active .mobile-nav-backdrop {
    opacity: 1;
    pointer-events: auto;
  }
  
  .mobile-nav-active .mobile-nav {
    transform: translateX(0);
  }

  /* 方案二：使用 .mobile-nav-wrapper.active 的页面（博客页面等） */
  .mobile-nav-wrapper.active {
    visibility: visible;
    pointer-events: auto;
  }
  
  .mobile-nav-wrapper.active .mobile-nav-backdrop {
    opacity: 1;
    pointer-events: auto;
  }
  
  .mobile-nav-wrapper.active .mobile-nav {
    transform: translateX(0);
  }

  /* 确保汉堡按钮在最上层 */
  .mobile-nav-toggle {
    position: fixed;
    top: 15px;
    right: 15px;
    z-index: 10003;
    background-color: rgba(255, 255, 255, 0.9);
    border: none;
    border-radius: 4px;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color, #1A365D);
    font-size: 24px;
    cursor: pointer;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
  }
  
  .mobile-nav-toggle:hover {
    background-color: rgba(255, 255, 255, 1);
    transform: scale(1.05);
  }

  /* 关闭按钮样式 */
  .close-mobile-nav {
    position: absolute;
    top: 20px;
    right: 20px;
    background: none;
    border: none;
    font-size: 24px;
    color: var(--primary-color, #1A365D);
    cursor: pointer;
    padding: 10px;
    z-index: 10002;
    transition: transform 0.3s ease;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
  }
  
  .close-mobile-nav:hover {
    background-color: rgba(0, 0, 0, 0.1);
    transform: rotate(90deg);
  }

  /* 移动导航菜单项样式 */
  .mobile-nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
  }
  
  .mobile-nav li {
    margin-bottom: 1rem;
    opacity: 0;
    transform: translateX(20px);
    transition: opacity 0.3s ease, transform 0.3s ease;
  }
  
  .mobile-nav-wrapper.active .mobile-nav li,
  .mobile-nav-active .mobile-nav li {
    opacity: 1;
    transform: translateX(0);
  }
  
  .mobile-nav-wrapper.active .mobile-nav li:nth-child(1) { transition-delay: 0.1s; }
  .mobile-nav-wrapper.active .mobile-nav li:nth-child(2) { transition-delay: 0.15s; }
  .mobile-nav-wrapper.active .mobile-nav li:nth-child(3) { transition-delay: 0.2s; }
  .mobile-nav-wrapper.active .mobile-nav li:nth-child(4) { transition-delay: 0.25s; }
  .mobile-nav-wrapper.active .mobile-nav li:nth-child(5) { transition-delay: 0.3s; }
  
  .mobile-nav a {
    display: block;
    padding: 12px 0;
    color: var(--primary-color, #1A365D);
    font-size: 18px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    position: relative;
  }
  
  .mobile-nav a:after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: 8px;
    left: 0;
    background-color: var(--secondary-color, #D4AF37);
    transition: width 0.3s ease;
  }
  
  .mobile-nav a:hover {
    color: var(--secondary-color, #D4AF37);
    padding-left: 5px;
  }
  
  .mobile-nav a:hover:after,
  .mobile-nav a.active:after {
    width: 30px;
  }
  
  .mobile-nav a.active {
    color: var(--secondary-color, #D4AF37);
  }

  /* 防止body滚动 */
  body.mobile-nav-active {
    overflow: hidden;
    position: fixed;
    width: 100%;
    height: 100%;
  }
}

/* 头图遮罩不应拦截下方内容点击 */
.case-study-header .overlay,
.case-hero .overlay {
  pointer-events: none;
}

/* 确保在小屏幕设备上移动导航按钮可见 */
@media (max-width: 575px) {
  .mobile-nav {
    width: 280px;
    padding: 70px 25px 25px;
  }
  
  .mobile-nav-toggle {
    top: 10px;
    right: 10px;
    width: 40px;
    height: 40px;
    font-size: 20px;
  }
}