1. CSS Container Query Units

    Container Query Units specify a length relative to the dimensions of a query container. The units include: `cqw`, `cqh`, `cqi`, `cqb`, `cqmin`, and `cqmax`.

  2. css api: `cqw()` static method

  3. types: `<length>`: container query length units `cqw`, `cqh`, `cqi`, `cqb`, `cqmin`, `cqmax`