*{
	margin: 0;
	padding: 0;
	list-style:none;
	text-decoration: none;
	box-sizing: border-box;
	font-family: 'Open Sans','微軟正黑體';
}
html{
	position: relative;
	height: 100%;
	width: 100%;
	/* border: 1px solid #000; */
}
body{
	position: relative;
	margin: 0 auto;
	width: 100%;
	height: 100%;
	/* border: 1px solid #f00; */
	max-width: 1920px;
    min-width: 1280px;
    min-height: 658px;
}
.startgame_area{
	position: absolute;
	display: block;
	z-index: 8;
	width: 100%;
	height: 100%;
	background-color: rgba(0, 0, 0, 1);
	color: #fff;
	text-align: center;
}
.startgame_area::before{
	content:'';
	display: inline-block;
	height: 100%;
	width: 0;
	vertical-align: middle;
}
.countdown_area{
	position: absolute;
	display: none;
	z-index: 8;
	width: 100%;
	height: 100%;
	background-color: rgba(0, 0, 0, 1);
	color: #fff;
	text-align: center;
}
.countdown_area::before{
	content:'';
	display: inline-block;
	height: 100%;
	width: 0;
	vertical-align: middle;
}
.countdown_area h1{
	display: inline-block;
	vertical-align: middle;
}
.page1_content{
	position: absolute;
	display: block;
	top: 0%;
	left: 0;
	right: 0;
	bottom: 0;
	margin: auto;
	z-index: 3;
	/* border: 1px solid #0f0; */
}
.game_area{
	position: absolute;
	display: block;
	z-index: 3;
	left: 0;
	right: 0;
	margin: 0 auto;
	width: 70%;
	height: 90%;
	border: 10px solid #f00;
	overflow: hidden;
}
.game_area:hover{
	cursor: url('../img/cursor.cur') 25 25,auto;
	cursor: crosshair \9;/*for ie6、7、8*/
}
/*for edge*/
@supports (-ms-ime-align:auto) {
    .game_area:hover{
		cursor: crosshair;
	}
}
/*for ie10 、 ie11*/
@media screen and (-ms-high-contrast: active),(-ms-high-contrast: none){
    .game_area:hover{
		cursor: crosshair;
	}
}
.gun_area{
	position: absolute;
	display: block;
	z-index: 3;
	left: 0;
	right: 0;
	margin: 0 auto;
	bottom: 10%;
	width: 18%;
	height: 18%;
}
.gun_area1{
	z-index: 4;
	background-color: #007bff;
}
.gun_arrow{
	position: absolute;
	display: block;
	z-index: 1;
	left: 0;
	right: 0;
	margin: 0 auto;
	top: -15px;
	width: 30px;
	height: 30px;
	background-color: #007bff;
	transform: rotate(45deg);
}
.bullet{
	position: absolute;
	display: block;
	z-index: 3;
	top: 0;
	bottom: 0;
	left: 0;
	right: 0;
	margin: auto;
	width: 20%;
	height: 40%;
	background-color: #0f0;
	pointer-events: none;
}
.enemy{
	position: absolute;
	display: block;
	top: 5%;
	left: 0;
	width: 8%;
	height: 10%;
	opacity: 0;
	background-color: #000;
	animation: enemy_ni 3s 0s linear forwards;
	-webkit-animation: enemy_ni 3s 0s linear forwards;
}
@-webkit-keyframes enemy_ni{
	0%{
		left: 0;
	}
	100%{
		left: 100%;
	}
}
@-moz-keyframes enemy_ni{
	0%{
		left: 0;
	}
	100%{
		left: 100%;
	}
}
@-o-keyframes enemy_ni{
	0%{
		left: 0;
	}
	100%{
		left: 100%;
	}
}
@-ms-keyframes enemy_ni{
	0%{
		left: 0;
	}
	100%{
		left: 100%;
	}
}
@keyframes enemy_ni{
	0%{
		left: 0;
	}
	100%{
		left: 100%;
	}
}
.enemy2{
	position: absolute;
	display: block;
	top: 25%;
	right: 0;
	width: 8%;
	height: 10%;
	opacity: 0;
	background-color: #fa0;
	animation: enemy2_ni 3s 0s linear forwards;
	-webkit-animation: enemy2_ni 3s 0s linear forwards;
}
@-webkit-keyframes enemy2_ni{
	0%{
		right: 0;
	}
	100%{
		right: 100%;
	}
}
@-moz-keyframes enemy2_ni{
	0%{
		right: 0;
	}
	100%{
		right: 100%;
	}
}
@-o-keyframes enemy2_ni{
	0%{
		right: 0;
	}
	100%{
		right: 100%;
	}
}
@-ms-keyframes enemy2_ni{
	0%{
		right: 0;
	}
	100%{
		right: 100%;
	}
}
@keyframes enemy2_ni{
	0%{
		right: 0;
	}
	100%{
		right: 100%;
	}
}
.get{
	position: absolute;
	display: block;
	left: 0;
	right: 0;
	bottom: 0;
	margin: 0 auto;
	width: 100%;
	height: 40%;
	border: 2px solid #0f0;
	color: #0f0;
}
.score_area{
	position: absolute;
	display: block;
	left: 2%;
	bottom: 2%;
	font-weight: bold;
	font-size: 32px;
}
.time_area{
	position: absolute;
	display: block;
	right: 2%;
	bottom: 2%;
	font-weight: bold;
	font-size: 32px;
}
.bl_area{
	position: absolute;
	display: block;
	right: 2%;
	bottom: 10%;
	font-weight: bold;
	font-size: 32px;
}