* {
	margin: 0;
	padding: 0;
	box-sizing: border-box;
}

body {
	font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
	font-size: 15px;
	line-height: 1.8;
	color: #333;
	background-color: #f9f9f9;
	padding: 16px;
	max-width: 800px;
	margin: 0 auto;
}

.protocol-container {
	background-color: #fff;
	padding: 24px 20px;
	border-radius: 8px;
	box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.lang-switch {
	text-align: right;
	font-size: 14px;
	margin-bottom: 12px;
	color: #999;
}

.lang-switch a {
	color: #2563eb;
	text-decoration: none;
	padding: 0 4px;
}

.lang-switch a.active {
	color: #111;
	font-weight: 600;
}

.protocol-title {
	font-size: 22px;
	font-weight: bold;
	text-align: center;
	margin-bottom: 24px;
	color: #2c3e50;
	padding-bottom: 12px;
	border-bottom: 1px solid #eee;
}

.section {
	margin-bottom: 22px;
}

.section-title {
	font-size: 17px;
	font-weight: 600;
	margin-bottom: 12px;
	color: #34495e;
}

.text {
	margin-bottom: 10px;
	text-align: justify;
}

.indent {
	padding-left: 1em;
}

.last-section {
	margin-top: 24px;
	padding-top: 12px;
	border-top: 1px solid #eee;
	color: #666;
}

@media (max-width: 768px) {
	body {
		padding: 10px;
		font-size: 15px;
	}

	.protocol-container {
		padding: 18px 14px;
	}

	.protocol-title {
		font-size: 20px;
	}

	.section-title {
		font-size: 16px;
	}
}