W250913/17.scss/demo.sass

// 变量
$a: #f00;
$b: 50;
$c: #ff0 !default;
h1 {
    color: $a !important;
    font-size: $b + px;
    color: $c;
}

ul li {
    $d:#00f !global;
    color: $d;
}

p {
    color: $d;
}