Laravel加入三张桌子，加入优先权

Question

I am trying to join three tables in my application. Below you can check the example table structure

Table A
----------------
| a_id |  b_fk |
----------------
| 1    |  2    |
----------------
| 2    |  2    |
----------------

Table b
----------------
| b_id |  c_fk |
----------------
| 1    |  1    |
----------------
| 2    |  1    |
----------------

Table C
----------------
| c_id |  value|
----------------
| 1    | aaa   |
----------------
| 2    | ccc   |
----------------

I want to join these three table and implement join with precedence using Laravel query builder

SELECT * FROM a LEFT JOIN (b JOIN c ON (b.c_kf = c.id)) ON (a.b_fk = b.id);

I've tried to do something like this

DB::table('a')->leftJoin('b', function ($join){
    $join->leftjoin('c', 'b.c_fk', '=', 'c.id')
    ->on('a.b_fk', '=', 'b.id');
})

Which forms following query

SELECT * FROM a LEFT JOIN b ON (a.b_fk = b.id);

Is there a way to join multiple tables in Laravel and implement precedence?