why the page i generated have two css style?

[Rey-Wang]

I configured the gruntfiles.js with the default template

jsdoc: {
    dist: {
        src: ['src/**/*.js'],
        options: {
            destination: 'build/docs',
            configure: 'node_modules/angular-jsdoc/common/conf.json',
            template: 'node_modules/angular-jsdoc/default',
            tutorial: 'tutorials',
            readme: './README.md'
        }
    }
}

but the page generated presents a different style

[Rey-Wang]

why generate two directive.html?