/* 基础样式重置 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

  /* 通用按钮基础样式（可选） */
button {
  border: none;
  cursor: pointer;
  transition: all 0.3s;
}


.bailong-header {
  --bl-primary: #4a6bdf;
  --bl-dark: #2c3e50;
  --bl-light: #f8f9fa;
  --bl-border: #e1e5ee;
  background: white;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
  position: sticky;
  top: 0;
  z-index: 1000;
  margin: 0;
  padding: 0;
}

.bl-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 70px;
}

/* Logo样式 */
.bl-logo {
  font-size: 1.5rem;
  font-weight: bold;
  color: var(--bl-dark);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 10px;
}

.bl-logo i {
  color: var(--bl-primary);
  font-size: 1.8rem;
}

/* 桌面导航 */
.bl-desktop-nav {
  display: flex;
}

.bl-main-menu {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 15px;
}

.bl-menu-item > a {
  color: var(--bl-dark);
  text-decoration: none;
  padding: 10px 15px;
  border-radius: 4px;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: all 0.3s;
}

.bl-menu-item > a:hover {
  background: rgba(74, 107, 223, 0.1);
  color: var(--bl-primary);
}

/* 下拉菜单 */
.bl-has-dropdown {
  position: relative;
}

.bl-dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  background: white;
  min-width: 200px;
  box-shadow: 0 5px 15px rgba(0,0,0,0.1);
  border-radius: 4px;
  list-style: none;
  padding: 10px 0;
  margin: 5px 0 0;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s;
  z-index: 100;
}

.bl-has-dropdown:hover .bl-dropdown-menu {
  opacity: 1;
  visibility: visible;
}

.bl-dropdown-menu li a {
  padding: 8px 20px;
  display: block;
  color: var(--bl-dark);
  text-decoration: none;
  transition: all 0.2s;
}

.bl-dropdown-menu li a:hover {
  background: var(--bl-light);
  color: var(--bl-primary);
  padding-left: 25px;
}

.bl-dropdown-menu i {
  width: 20px;
  text-align: center;
}

.bl-arrow {
  margin-left: 5px;
  font-size: 0.8rem;
  transition: transform 0.3s;
}

.bl-has-dropdown:hover .bl-arrow {
  transform: rotate(180deg);
}

/* 移动端菜单按钮 */
.bl-mobile-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--bl-dark);
  cursor: pointer;
}

/* 移动端菜单 */
.bl-mobile-nav {
  display: none;
  background: white;
  padding: 15px 20px;
  border-top: 1px solid var(--bl-border);
}

.bl-mobile-menu {
  list-style: none;
  padding: 0;
  margin: 0;
}

.bl-mobile-menu > li {
  margin-bottom: 10px;
}

.bl-mobile-menu a {
  display: flex;
  align-items: center;   /* 垂直居中 */
  justify-content: center; /* 新增：水平居中 */
  gap: 10px;
  padding: 10px;
  color: var(--bl-dark);
  text-decoration: none;
  border-radius: 4px;
}

.bl-mobile-menu a:hover {
  background: rgba(74, 107, 223, 0.1);
}

.bl-mobile-menu ul {
  list-style: none;
  padding-left: 20px;
  display: none;
}

.bl-mobile-menu ul a {
  padding-left: 30px;
}

.bl-mobile-category {
  justify-content: space-between;
}

/* 响应式设计 */
@media (max-width: 992px) {
  .bl-desktop-nav {
    display: none;
  }
  
  .bl-mobile-toggle {
    display: block;
  }
  
  .bl-mobile-nav.active {
    display: block;
  }
}