html, body {
	margin: 0;
	padding: 0;
	color: #776e65;
	font-family: "Clear Sans", "Helvetica Neue", Arial, sans-serif;
	font-size: 18px;
}

body {
	margin: 10px 0;
	background: #faf8ef;
}

@media (prefers-color-scheme: dark) {
	body {
		margin: 10px 0;
		#color: #eee;
		background: #0f0f0f;
	}
}

.heading:after {
	content: "";
	display: block;
	clear: both;
}

h1.title {
	font-size: 60px;  /* 80px改 */
	font-weight: bold;
	margin: 0;
	display: block;
	float: left;
}

@-webkit-keyframes move-up {
	0% {
		top: 25px;
		opacity: 1;
	}

	100% {
		top: -50px;
		opacity: 0;
	}
}

@-moz-keyframes move-up {
	0% {
		top: 25px;
		opacity: 1;
	}

	100% {
		top: -50px;
		opacity: 0;
	}
}

@keyframes move-up {
	0% {
		top: 25px;
		opacity: 1;
	}

	100% {
		top: -50px;
		opacity: 0;
	}
}

.scores-container {
	float: right;
	text-align: right;
}

.score-container, .best-container {
	position: relative;
	display: inline-block;
	background: #bbada0;
	padding: 15px 25px;
	font-size: 25px;
	height: 25px;
	line-height: 47px;
	font-weight: bold;
	border-radius: 3px;
	color: white;
	margin-top: 8px;
	text-align: center;
}

.score-container:after, .best-container:after {
	position: absolute;
	width: 100%;
	top: 10px;
	left: 0;
	text-transform: uppercase;
	font-size: 13px;
	line-height: 13px;
	text-align: center;
	color: #eee4da;
}

.score-container .score-addition, .best-container .score-addition {
	position: absolute;
	right: 30px;
	color: red;
	font-size: 25px;
	line-height: 25px;
	font-weight: bold;
	color: rgba(119, 110, 101, 0.9);
	z-index: 100;
	-webkit-animation: move-up 600ms ease-in;
	-moz-animation: move-up 600ms ease-in;
	animation: move-up 600ms ease-in;
	-webkit-animation-fill-mode: both;
	-moz-animation-fill-mode: both;
	animation-fill-mode: both;
}

.score-container:after {
	content: "Score";
}

.best-container:after {
	content: "Best";
}

p {
	margin-top: 0;
	margin-bottom: 10px;
	line-height: 1.65;
}

a {
	color: #776e65;
	font-weight: bold;
	text-decoration: underline;
	cursor: pointer;
}

strong.important {
	text-transform: uppercase;
}

hr {
	border: none;
	border-bottom: 1px solid #d8d4d0;
	margin-top: 20px;
	margin-bottom: 30px;
}

.container {
	width: 620px;
	margin: 0 auto;
}

@-webkit-keyframes fade-in {
	0% {
		opacity: 0;
	}

	100% {
		opacity: 1;
	}
}

@-moz-keyframes fade-in {
	0% {
		opacity: 0;
	}

	100% {
		opacity: 1;
	}
}

@keyframes fade-in {
	0% {
		opacity: 0;
	}

	100% {
		opacity: 1;
	}
}

.game-container {
	margin-top: 40px;
	position: relative;
	padding: 15px;
	cursor: default;
	-webkit-touch-callout: none;
	-ms-touch-callout: none;
	-webkit-user-select: none;
	-moz-user-select: none;
	-ms-user-select: none;
	-ms-touch-action: none;
	touch-action: none;
	background: #bbada0;
	border-radius: 6px;
	width: 620px;
	height: 620px;
	-webkit-box-sizing: border-box;
	-moz-box-sizing: border-box;
	box-sizing: border-box;
}

.game-container .game-message {
	display: none;
	position: absolute;
	top: 0;
	right: 0;
	bottom: 0;
	left: 0;
	background: rgba(238, 228, 218, 0.5);
	z-index: 100;
	text-align: center;
	-webkit-animation: fade-in 800ms ease 1200ms;
	-moz-animation: fade-in 800ms ease 1200ms;
	animation: fade-in 800ms ease 1200ms;
	-webkit-animation-fill-mode: both;
	-moz-animation-fill-mode: both;
	animation-fill-mode: both;
}

.game-container .game-message p {
	font-size: 60px;
	font-weight: bold;
	height: 60px;
	line-height: 60px;
	margin-top: 222px;
}

.game-container .game-message .lower {
	display: block;
	margin-top: 121px;
	font-size: 32px;
}

.game-container .game-message a {
	display: inline-block;
	background: #8f7a66;
	border-radius: 3px;
	padding: 0 20px;
	text-decoration: none;
	color: #f9f6f2;
	height: 40px;
	line-height: 42px;
	margin-left: 9px;
}

.game-container .game-message a.keep-playing-button {
	display: none;
}

.game-container .game-message.game-won {
	background: rgba(237, 194, 46, 0.5);
	color: #f9f6f2;
}

.game-container .game-message.game-won a.keep-playing-button {
	display: inline-block;
}

.game-container .game-message.game-won, .game-container .game-message.game-over {
	display: block;
}

.grid-container {
	position: absolute;
	z-index: 1;
}

.grid-row {
	margin-bottom: 15px;
}

.grid-row:last-child {
	margin-bottom: 0;
}

.grid-row:after {
	content: "";
	display: block;
	clear: both;
}

.grid-cell {
	#width: 106.25px;
	#height: 106.25px;
	width: 136.25px;
	height: 136.25px;
	margin-right: 15px;
	float: left;
	border-radius: 3px;
	background: rgba(238, 228, 218, 0.35);
}

.grid-cell:last-child {
	margin-right: 0;
}

.tile-container {
	position: absolute;
	z-index: 2;
}

.tile, .tile .tile-inner {
	width: 137px;
	height: 137px;
	line-height: 137px;
}

.tile.tile-position-1-1 {
	-webkit-transform: translate(0px, 0px);
	-moz-transform: translate(0px, 0px);
	-ms-transform: translate(0px, 0px);
	transform: translate(0px, 0px);
}

.tile.tile-position-1-2 {
	-webkit-transform: translate(0px, 151px);
	-moz-transform: translate(0px, 151px);
	-ms-transform: translate(0px, 151px);
	transform: translate(0px, 151px);
}

.tile.tile-position-1-3 {
	-webkit-transform: translate(0px, 302px);
	-moz-transform: translate(0px, 302px);
	-ms-transform: translate(0px, 302px);
	transform: translate(0px, 302px);
}

.tile.tile-position-1-4 {
	-webkit-transform: translate(0px, 453px);
	-moz-transform: translate(0px, 453px);
	-ms-transform: translate(0px, 453px);
	transform: translate(0px, 453px);
}

.tile.tile-position-2-1 {
	-webkit-transform: translate(151px, 0px);
	-moz-transform: translate(151px, 0px);
	-ms-transform: translate(151px, 0px);
	transform: translate(151px, 0px);
}

.tile.tile-position-2-2 {
	-webkit-transform: translate(151px, 151px);
	-moz-transform: translate(151px, 151px);
	-ms-transform: translate(151px, 151px);
	transform: translate(151px, 151px);
}

.tile.tile-position-2-3 {
	-webkit-transform: translate(151px, 302px);
	-moz-transform: translate(151px, 302px);
	-ms-transform: translate(151px, 302px);
	transform: translate(151px, 302px);
}

.tile.tile-position-2-4 {
	-webkit-transform: translate(151px, 453px);
	-moz-transform: translate(151px, 453px);
	-ms-transform: translate(151px, 453px);
	transform: translate(151px, 453px);
}

.tile.tile-position-3-1 {
	-webkit-transform: translate(302px, 0px);
	-moz-transform: translate(302px, 0px);
	-ms-transform: translate(302px, 0px);
	transform: translate(302px, 0px);
}

.tile.tile-position-3-2 {
	-webkit-transform: translate(302px, 151px);
	-moz-transform: translate(302px, 151px);
	-ms-transform: translate(302px, 151px);
	transform: translate(302px, 151px);
}

.tile.tile-position-3-3 {
	-webkit-transform: translate(302px, 302px);
	-moz-transform: translate(302px, 302px);
	-ms-transform: translate(302px, 302px);
	transform: translate(302px, 302px);
}

.tile.tile-position-3-4 {
	-webkit-transform: translate(302px, 453px);
	-moz-transform: translate(302px, 453px);
	-ms-transform: translate(302px, 453px);
	transform: translate(302px, 453px);
}

.tile.tile-position-4-1 {
	-webkit-transform: translate(453px, 0px);
	-moz-transform: translate(453px, 0px);
	-ms-transform: translate(453px, 0px);
	transform: translate(453px, 0px);
}

.tile.tile-position-4-2 {
	-webkit-transform: translate(453px, 151px);
	-moz-transform: translate(453px, 151px);
	-ms-transform: translate(453px, 151px);
	transform: translate(453px, 151px);
}

.tile.tile-position-4-3 {
	-webkit-transform: translate(453px, 302px);
	-moz-transform: translate(453px, 302px);
	-ms-transform: translate(453px, 302px);
	transform: translate(453px, 302px);
}

.tile.tile-position-4-4 {
	-webkit-transform: translate(453px, 453px);
	-moz-transform: translate(453px, 453px);
	-ms-transform: translate(453px, 453px);
	transform: translate(453px, 453px);
}

.tile {
	position: absolute;
	-webkit-transition: 100ms ease-in-out;
	-moz-transition: 100ms ease-in-out;
	transition: 100ms ease-in-out;
	-webkit-transition-property: -webkit-transform;
	-moz-transition-property: -moz-transform;
	transition-property: transform;
}

.tile .tile-inner {
	border-radius: 3px;
	background: #eee4da;
	text-align: center;
	font-weight: bold;
	z-index: 10;
	font-size: 55px;
}

.tile.tile-2 .tile-inner {
	background: #eee4da;
	box-shadow: 0 0 30px 10px rgba(243, 215, 116, 0), inset 0 0 0 1px rgba(255, 255, 255, 0);
}

.tile.tile-4 .tile-inner {
	background: #ede0c8;
	box-shadow: 0 0 30px 10px rgba(243, 215, 116, 0), inset 0 0 0 1px rgba(255, 255, 255, 0);
}

.tile.tile-8 .tile-inner {
	color: #f9f6f2;
	background: #f2b179;
}

.tile.tile-16 .tile-inner {
	color: #f9f6f2;
	background: #f59563;
}

.tile.tile-32 .tile-inner {
	color: #f9f6f2;
	background: #f67c5f;
}

.tile.tile-64 .tile-inner {
	color: #f9f6f2;
	background: #f65e3b;
}

.tile.tile-128 .tile-inner {
	color: #f9f6f2;
	background: #edcf72;
	box-shadow: 0 0 30px 10px rgba(243, 215, 116, 0.2381), inset 0 0 0 1px rgba(255, 255, 255, 0.14286);
	font-size: 45px;
}

@media screen and (max-width: 520px) {
	.tile.tile-128 .tile-inner {
		font-size: 25px;
	}
}

.tile.tile-256 .tile-inner {
	color: #f9f6f2;
	background: #edcc61;
	box-shadow: 0 0 30px 10px rgba(243, 215, 116, 0.31746), inset 0 0 0 1px rgba(255, 255, 255, 0.19048);
	font-size: 45px;
}

@media screen and (max-width: 520px) {
	.tile.tile-256 .tile-inner {
		font-size: 25px;
	}
}

.tile.tile-512 .tile-inner {
	color: #f9f6f2;
	background: #edc850;
	box-shadow: 0 0 30px 10px rgba(243, 215, 116, 0.39683), inset 0 0 0 1px rgba(255, 255, 255, 0.2381);
	font-size: 45px;
}

@media screen and (max-width: 520px) {
	.tile.tile-512 .tile-inner {
		font-size: 25px;
	}
}

.tile.tile-1024 .tile-inner {
	color: #f9f6f2;
	background: #edc53f;
	box-shadow: 0 0 30px 10px rgba(243, 215, 116, 0.47619), inset 0 0 0 1px rgba(255, 255, 255, 0.28571);
	font-size: 35px;
}

@media screen and (max-width: 520px) {
	.tile.tile-1024 .tile-inner {
		font-size: 15px;
	}
}

.tile.tile-2048 .tile-inner {
	color: #f9f6f2;
	background: #edc22e;
	box-shadow: 0 0 30px 10px rgba(243, 215, 116, 0.55556), inset 0 0 0 1px rgba(255, 255, 255, 0.33333);
	font-size: 35px;
}

@media screen and (max-width: 520px) {
	.tile.tile-2048 .tile-inner {
		font-size: 15px;
	}
}

.tile.tile-super .tile-inner {
	color: #f9f6f2;
	background: #3c3a32;
	font-size: 30px;
}

@media screen and (max-width: 520px) {
	.tile.tile-super .tile-inner {
		font-size: 10px;
	}
}

@-webkit-keyframes appear {
	0% {
		opacity: 0;
		-webkit-transform: scale(0);
		-moz-transform: scale(0);
		-ms-transform: scale(0);
		transform: scale(0);
	}

	100% {
		opacity: 1;
		-webkit-transform: scale(1);
		-moz-transform: scale(1);
		-ms-transform: scale(1);
		transform: scale(1);
	}
}

@-moz-keyframes appear {
	0% {
		opacity: 0;
		-webkit-transform: scale(0);
		-moz-transform: scale(0);
		-ms-transform: scale(0);
		transform: scale(0);
	}

	100% {
		opacity: 1;
		-webkit-transform: scale(1);
		-moz-transform: scale(1);
		-ms-transform: scale(1);
		transform: scale(1);
	}
}

@keyframes appear {
	0% {
		opacity: 0;
		-webkit-transform: scale(0);
		-moz-transform: scale(0);
		-ms-transform: scale(0);
		transform: scale(0);
	}

	100% {
		opacity: 1;
		-webkit-transform: scale(1);
		-moz-transform: scale(1);
		-ms-transform: scale(1);
		transform: scale(1);
	}
}

.tile-new .tile-inner {
	-webkit-animation: appear 200ms ease 100ms;
	-moz-animation: appear 200ms ease 100ms;
	animation: appear 200ms ease 100ms;
	-webkit-animation-fill-mode: backwards;
	-moz-animation-fill-mode: backwards;
	animation-fill-mode: backwards;
}

@-webkit-keyframes pop {
	0% {
		-webkit-transform: scale(0);
		-moz-transform: scale(0);
		-ms-transform: scale(0);
		transform: scale(0);
	}

	50% {
		-webkit-transform: scale(1.2);
		-moz-transform: scale(1.2);
		-ms-transform: scale(1.2);
		transform: scale(1.2);
	}

	100% {
		-webkit-transform: scale(1);
		-moz-transform: scale(1);
		-ms-transform: scale(1);
		transform: scale(1);
	}
}

@-moz-keyframes pop {
	0% {
		-webkit-transform: scale(0);
		-moz-transform: scale(0);
		-ms-transform: scale(0);
		transform: scale(0);
	}

	50% {
		-webkit-transform: scale(1.2);
		-moz-transform: scale(1.2);
		-ms-transform: scale(1.2);
		transform: scale(1.2);
	}

	100% {
		-webkit-transform: scale(1);
		-moz-transform: scale(1);
		-ms-transform: scale(1);
		transform: scale(1);
	}
}

@keyframes pop {
	0% {
		-webkit-transform: scale(0);
		-moz-transform: scale(0);
		-ms-transform: scale(0);
		transform: scale(0);
	}

	50% {
		-webkit-transform: scale(1.2);
		-moz-transform: scale(1.2);
		-ms-transform: scale(1.2);
		transform: scale(1.2);
	}

	100% {
		-webkit-transform: scale(1);
		-moz-transform: scale(1);
		-ms-transform: scale(1);
		transform: scale(1);
	}
}

.tile-merged .tile-inner {
	z-index: 20;
	-webkit-animation: pop 200ms ease 100ms;
	-moz-animation: pop 200ms ease 100ms;
	animation: pop 200ms ease 100ms;
	-webkit-animation-fill-mode: backwards;
	-moz-animation-fill-mode: backwards;
	animation-fill-mode: backwards;
}

.above-game:after {
	content: "";
	display: block;
	clear: both;
}

.game-intro {
	float: left;
	line-height: 42px;
	margin-bottom: 0;
}

.restart-button {
	display: inline-block;
	background: #8f7a66;
	border-radius: 3px;
	padding: 0 20px;
	text-decoration: none;
	color: #f9f6f2;
	height: 40px;
	line-height: 42px;
	display: block;
	text-align: center;
	float: right;
}

.switchtheme-button {
	display: inline-block;
	background: #8f7a66;
	border-radius: 3px;
	padding: 0 20px;
	text-decoration: none;
	color: #f9f6f2;
	height: 40px;
	line-height: 42px;
	display: block;
	text-align: center;
	float: right;
}

.game-explanation {
	margin-top: 50px;
}

@media screen and (max-width: 520px) {
	html, body {
		font-size: 15px;
	}

	body {
		margin: 20px 0;
		padding: 0 20px;
	}

	h1.title {
		font-size: 27px;
		margin-top: 15px;
	}

	.container {
		width: 280px;
		margin: 0 auto;
	}

	.score-container, .best-container {
		margin-top: 0;
		padding: 15px 10px;
		min-width: 40px;
	}

	.heading {
		margin-bottom: 10px;
	}

	.game-intro {
		width: 55%;
		display: block;
		box-sizing: border-box;
		line-height: 1.65;
	}

	.restart-button {
		width: 42%;
		padding: 0;
		display: block;
		box-sizing: border-box;
		margin-top: 2px;
	}

	.game-container {
		margin-top: 17px;
		position: relative;
		padding: 10px;
		cursor: default;
		-webkit-touch-callout: none;
		-ms-touch-callout: none;
		-webkit-user-select: none;
		-moz-user-select: none;
		-ms-user-select: none;
		-ms-touch-action: none;
		touch-action: none;
		background: #bbada0;
		border-radius: 6px;
		width: 280px;
		height: 280px;
		-webkit-box-sizing: border-box;
		-moz-box-sizing: border-box;
		box-sizing: border-box;
	}

	.game-container .game-message {
		display: none;
		position: absolute;
		top: 0;
		right: 0;
		bottom: 0;
		left: 0;
		background: rgba(238, 228, 218, 0.5);
		z-index: 100;
		text-align: center;
		-webkit-animation: fade-in 800ms ease 1200ms;
		-moz-animation: fade-in 800ms ease 1200ms;
		animation: fade-in 800ms ease 1200ms;
		-webkit-animation-fill-mode: both;
		-moz-animation-fill-mode: both;
		animation-fill-mode: both;
	}

	.game-container .game-message p {
		font-size: 60px;
		font-weight: bold;
		height: 60px;
		line-height: 60px;
		margin-top: 222px;
	}

	.game-container .game-message .lower {
		display: block;
		margin-top: 121px;
		font-size: 32px;
	}

	.game-container .game-message a {
		display: inline-block;
		background: #8f7a66;
		border-radius: 3px;
		padding: 0 20px;
		text-decoration: none;
		color: #f9f6f2;
		height: 40px;
		line-height: 42px;
		margin-left: 9px;
	}

	.game-container .game-message a.keep-playing-button {
		display: none;
	}

	.game-container .game-message.game-won {
		background: rgba(237, 194, 46, 0.5);
		color: #f9f6f2;
	}

	.game-container .game-message.game-won a.keep-playing-button {
		display: inline-block;
	}

	.game-container .game-message.game-won, .game-container .game-message.game-over {
		display: block;
	}

	.grid-container {
		position: absolute;
		z-index: 1;
	}

	.grid-row {
		margin-bottom: 10px;
	}

	.grid-row:last-child {
		margin-bottom: 0;
	}

	.grid-row:after {
		content: "";
		display: block;
		clear: both;
	}

	.grid-cell {
		width: 57.5px;
		height: 57.5px;
		margin-right: 10px;
		float: left;
		border-radius: 3px;
		background: rgba(238, 228, 218, 0.35);
	}

	.grid-cell:last-child {
		margin-right: 0;
	}

	.tile-container {
		position: absolute;
		z-index: 2;
	}

	.tile, .tile .tile-inner {
		width: 58px;
		height: 58px;
		line-height: 58px;
	}

	.tile.tile-position-1-1 {
		-webkit-transform: translate(0px, 0px);
		-moz-transform: translate(0px, 0px);
		-ms-transform: translate(0px, 0px);
		transform: translate(0px, 0px);
	}

	.tile.tile-position-1-2 {
		-webkit-transform: translate(0px, 67px);
		-moz-transform: translate(0px, 67px);
		-ms-transform: translate(0px, 67px);
		transform: translate(0px, 67px);
	}

	.tile.tile-position-1-3 {
		-webkit-transform: translate(0px, 135px);
		-moz-transform: translate(0px, 135px);
		-ms-transform: translate(0px, 135px);
		transform: translate(0px, 135px);
	}

	.tile.tile-position-1-4 {
		-webkit-transform: translate(0px, 202px);
		-moz-transform: translate(0px, 202px);
		-ms-transform: translate(0px, 202px);
		transform: translate(0px, 202px);
	}

	.tile.tile-position-2-1 {
		-webkit-transform: translate(67px, 0px);
		-moz-transform: translate(67px, 0px);
		-ms-transform: translate(67px, 0px);
		transform: translate(67px, 0px);
	}

	.tile.tile-position-2-2 {
		-webkit-transform: translate(67px, 67px);
		-moz-transform: translate(67px, 67px);
		-ms-transform: translate(67px, 67px);
		transform: translate(67px, 67px);
	}

	.tile.tile-position-2-3 {
		-webkit-transform: translate(67px, 135px);
		-moz-transform: translate(67px, 135px);
		-ms-transform: translate(67px, 135px);
		transform: translate(67px, 135px);
	}

	.tile.tile-position-2-4 {
		-webkit-transform: translate(67px, 202px);
		-moz-transform: translate(67px, 202px);
		-ms-transform: translate(67px, 202px);
		transform: translate(67px, 202px);
	}

	.tile.tile-position-3-1 {
		-webkit-transform: translate(135px, 0px);
		-moz-transform: translate(135px, 0px);
		-ms-transform: translate(135px, 0px);
		transform: translate(135px, 0px);
	}

	.tile.tile-position-3-2 {
		-webkit-transform: translate(135px, 67px);
		-moz-transform: translate(135px, 67px);
		-ms-transform: translate(135px, 67px);
		transform: translate(135px, 67px);
	}

	.tile.tile-position-3-3 {
		-webkit-transform: translate(135px, 135px);
		-moz-transform: translate(135px, 135px);
		-ms-transform: translate(135px, 135px);
		transform: translate(135px, 135px);
	}

	.tile.tile-position-3-4 {
		-webkit-transform: translate(135px, 202px);
		-moz-transform: translate(135px, 202px);
		-ms-transform: translate(135px, 202px);
		transform: translate(135px, 202px);
	}

	.tile.tile-position-4-1 {
		-webkit-transform: translate(202px, 0px);
		-moz-transform: translate(202px, 0px);
		-ms-transform: translate(202px, 0px);
		transform: translate(202px, 0px);
	}

	.tile.tile-position-4-2 {
		-webkit-transform: translate(202px, 67px);
		-moz-transform: translate(202px, 67px);
		-ms-transform: translate(202px, 67px);
		transform: translate(202px, 67px);
	}

	.tile.tile-position-4-3 {
		-webkit-transform: translate(202px, 135px);
		-moz-transform: translate(202px, 135px);
		-ms-transform: translate(202px, 135px);
		transform: translate(202px, 135px);
	}

	.tile.tile-position-4-4 {
		-webkit-transform: translate(202px, 202px);
		-moz-transform: translate(202px, 202px);
		-ms-transform: translate(202px, 202px);
		transform: translate(202px, 202px);
	}

	.tile .tile-inner {
		font-size: 35px;
	}

	.switchtheme-button {
		display: inline-block;
		background: #8f7a66;
		border-radius: 3px;
		padding: 0 20px;
		text-decoration: none;
		color: #f9f6f2;
		height: 40px;
		line-height: 42px;
		display: block;
		text-align: center;
		float: right;
	}

	.game-message p {
		font-size: 30px !important;
		height: 30px !important;
		line-height: 30px !important;
		margin-top: 90px !important;
	}

	.game-message .lower {
		margin-top: 30px !important;
	}
}