Appearance
字体加粗
class名
样式值
font-thin
font-weight: 100;
font-extralight
font-weight: 200;
font-light
font-weight: 300;
font-normal
font-weight: 400;
font-medium
font-weight: 500;
font-semibold
font-weight: 600;
font-bold
font-weight: 700;
fw-b
font-weight: 700;
fw-700
font-weight: 700;
font-extrabold
font-weight: 800;
font-black
font-weight: 900;