/* BlueRobotAI 导航下拉菜单（Solutions）修复版
 * 解决：.nav-links a 的 display:inline-flex 覆盖下拉项 → 强制纵向
 * 桌面（>=1200px）：悬停/点击浮层
 * 移动（<1200px）：点击 Solutions 手风琴展开
 */

/* 触发器容器：确保定位上下文 */
.nav-item-dropdown {
  position: relative;
  display: inline-block;
  vertical-align: middle;
}

/* 下拉触发器（Solutions 链接） */
.nav-dropdown-toggle {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  gap: 6px;
  color: inherit;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0;
  text-decoration: none;
  cursor: pointer;
}
.nav-dropdown-toggle .nav-caret {
  width: 8px;
  height: 8px;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg);
  margin-top: -3px;
  transition: transform .2s ease;
}
.nav-item-dropdown:hover .nav-caret,
.nav-item-dropdown.open .nav-caret {
  transform: rotate(225deg);
  margin-top: 3px;
}

/* ===== 下拉面板：绝对浮层（默认隐藏） ===== */
.nav-dropdown-panel {
  position: absolute !important;
  top: calc(100% + 4px) !important;
  left: 0 !important;
  transform: none !important;
  min-width: 260px;
  margin: 0;
  padding: 8px;
  border: 1px solid rgba(16, 20, 25, .08);
  border-radius: 10px;
  background: #fff;
  box-shadow: 0 18px 44px rgba(16, 20, 25, .14);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity .18s ease, visibility .18s;
  z-index: 1200;
}
.nav-item-dropdown:hover .nav-dropdown-panel,
.nav-item-dropdown.open .nav-dropdown-panel,
.nav-dropdown-panel:hover {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

/* ===== 菜单项：强制纵向块级（覆盖 .nav-links a 的 inline-flex） ===== */
.nav-links .nav-dropdown-item,
.mobile-menu .nav-dropdown-item {
  display: block !important;
  width: 100%;
  min-height: 0;
  margin: 0;
  padding: 11px 14px;
  border-radius: 8px;
  color: #101419;
  font-size: 14px;
  font-weight: 500;
  line-height: 1.4;
  white-space: nowrap;
  text-decoration: none;
  text-align: left;
  transition: background .15s ease, color .15s ease;
}
.nav-links .nav-dropdown-item:hover,
.nav-links .nav-dropdown-item:focus-visible {
  background: #f2f5f9;
  color: var(--brand-blue);
}

/* ===== 移动端（<1200px）：手风琴折叠 ===== */
@media (max-width: 1199px) {
  .nav-item-dropdown {
    display: block;
    width: 100%;
  }
  .nav-dropdown-toggle {
    width: 100%;
    min-height: 44px;
    justify-content: space-between;
    padding: 0;
  }
  .nav-dropdown-panel {
    position: static !important;
    display: none;
    transform: none;
    min-width: 0;
    margin: 0 0 4px 16px;
    padding: 4px 0;
    border: none;
    border-left: 2px solid rgba(22, 119, 255, .2);
    border-radius: 0;
    background: transparent;
    box-shadow: none;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }
  .nav-item-dropdown.open .nav-dropdown-panel {
    display: block;
  }
  .nav-links .nav-dropdown-item,
  .mobile-menu .nav-dropdown-item {
    padding: 10px 14px;
  }
}