如何调整用R kableExtra::add_header_above创建的表格中的标签？

library(knitr)
library(kableExtra)

# 创建一个数据框
data <- data.frame(
  Name = c("John", "Alice", "Bob"),
  Age = c(25, 30, 35),
  Salary = c(50000, 60000, 70000)
)

# 创建表格并添加表头标签
table <- kable(data, "html") %>%
  kable_styling(bootstrap_options = "striped", full_width = FALSE) %>%
  add_header_above(c("Personal Information" = 3, "Salary" = 1))

# 调整表头标签的样式
table <- table %>%
  row_spec(0, bold = TRUE, color = "white", background = "#007bff") %>%
  row_spec(1, bold = TRUE, color = "white", background = "#007bff")

# 输出表格
print(table)