<identifier>

示例代碼：

li {
	counter-increment: testname;
}
li {
	counter-reset: testname2;
}
@keyframes testanimations {
	from { opacity:1; }
	to { opacity:0; }
}

示例代碼：

li {
	counter-increment: border;
}
li {
	counter-reset: background;
}
@keyframes auto {
	from { opacity:1; }
	to { opacity:0; }
}