@charset "UTF-8";

* {
	margin: 0;
	padding: 0;
}

.wrapper {
	width: 100%;
	margin: 0 auto;
	position: relative;
}

.back-img {
	width: 4%;
	position: fixed;
	top: 10%;
	left: 10%;
	background-color: black;
	padding: 1%;
}

h1 {
	color: whitesmoke;
	font-size: 2.2rem;
	background-color: black;
	padding: 3% 3% 5%;
	text-align: center;
	letter-spacing: 0.2em;
	font-family: fangsong;
}

h1::first-letter {
	color: purple;
	font-size: 200%;
}

.flex-box {
	display: flex;
	align-items: flex-start;
	flex-direction: column;
}

section {
	width: 50%;
	margin: 10% auto;
}

img {
	width: 50%;
	margin: 0 auto;
	box-shadow: 30px 30px 30px gray;
}

.no-shadow {
	box-shadow: 0 0 0px white;
}

section .flex-item {
	width: 100%;
	padding-left: 3%;
}

section .flex-item img {
	width: 8%;
}


h2 {
	border-bottom: 2px dotted gray;
	text-indent: 0.3em;
	letter-spacing: 0.1em;
	padding-bottom: 2%;
	margin: 10% 0% 5%;
}

h3 {
	margin-bottom: 2%
}

section p {
	margin-bottom: 8.5%;
	text-indent: 1em;
}




@media screen and (max-width: 768px) {

	.back-img {
		width: 7%;
		border: 1px solid white;
		top: 6%;
	}

	section {
		width: 70%;
	}

	img {
		width: 85%;
	}

	img:nth-child(5) {
		margin-bottom: 10%;
	}

	section .flex-item img {
		width: 13%;
	}

}


@media screen and (max-width: 414px) {
	h1 {
		font-size: 2rem;
		padding: 5% 20% 12%;
	}

	.back-img {
		width: 10%;
		top: 4%;
	}

	section {
		width: 80%;
	}

	h2 {
		margin: 15% 0% 12%;
	}

	section p {
		width: 80%;
		margin: 0 auto 5%;
	}

}