.main {
	margin: 0;
	font-family: "Segoe UI", "Yu Gothic UI", sans-serif;
	background: linear-gradient(180deg, #f8fbff 0%, #f1f6ff 100%);
	color: #1f2a44;
}

.sub_in_main_content {
	max-width: 980px;
	margin: 14px auto;
	padding: 22px 24px;
	line-height: 1.9;
	background: #ffffff;
	border: 1px solid #d9e3f2;
	border-radius: 18px;
	box-shadow: 0 12px 30px rgba(20, 41, 78, 0.08);
}

.sub_in_main_content h1 {
	font-size: clamp(34px, 5vw, 48px);
	color: #1b3d7a;
	margin-bottom: 24px;
	text-align: center;
	letter-spacing: 0.02em;
}

.intro-text {
	font-size: clamp(21px, 3vw, 28px);
	margin: 16px 0;
	color: #2b3c59;
	line-height: 1.8;
}

.highlight {
	font-size: 1.4em;
	font-weight: bold;
	padding: 2px 10px;
	border-radius: 999px;
	display: inline-block;
}

.highlight.yellow {
	color: #a66600;
	background: #fff4cc;
	text-shadow: 
		0 1px 0 rgba(255, 255, 255, 0.65);
}

.highlight.pink {
	color: #a0296b;
	background: #ffe0f1;
	text-shadow: 
		0 1px 0 rgba(255, 255, 255, 0.65);
}

.highlight.green {
	color: #186c2c;
	background: #d7f5e0;
	text-shadow: 
		0 1px 0 rgba(255, 255, 255, 0.65);
}

.highlight.cyan {
	color: #006f80;
	background: #d8f9ff;
	text-shadow: 
		0 1px 0 rgba(255, 255, 255, 0.65);
}

@media (max-width: 700px) {
	.sub_in_main_content {
		margin: 8px;
		padding: 18px;
	}
}