:root {
 --primary: #2563eb;
 --success: #10b981;
}
* {
	margin: 0;
	padding: 0;
	box-sizing: border-box;
}
body {
	font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
	background: #40AC80;
	color: #e2e8f0;
	line-height: 1.6;
	margin: 0 30px;
}
.system-section {
	display: none;
}
.container {
	max-width: 1050px;
	margin: 0 auto;
}
header {
	text-align: center;
	margin-top: 50px;
	margin-bottom: 55px;
}
header h1 {
	font-size: 42px;
	font-weight: 700;
	margin-bottom: 10px;
	background: linear-gradient(90deg, #ffffff, #ffffff);
	-webkit-background-clip: text;
	-webkit-text-fill-color: transparent;
}
header p {
	font-size: 17.5px;
	color: #ffffff;
}
.download-grid {
	display: flex;
	flex-direction: column;
	gap: 20px;
}
.download-card {
	background: #1e2937;
	border-radius: 16px;
	overflow: hidden;
	border: 0px solid #ffffff;
	transition: all 0.3s ease;
}
.download-card:hover {
	border-color: var(--primary);
	box-shadow: 0 12px 30px rgba(37, 99, 235, 0.1);
}
.card-header {
	padding: 18px 26px;
	background: #1e2937;
	cursor: pointer;
	display: flex;
	justify-content: space-between;
	align-items: center;
	font-size: 19.5px;
	font-weight: 600;
	user-select: none;
}
.card-header:hover {
	background: #212d3c;
}
.arrow {
	font-size: 24px;
	transition: transform 0.3s ease;
}
.card-body {
	display: none;
	max-height: none !important;
	overflow: visible !important;
	background: #0f172a;
}
.card-body.open {
	display: block;
}
.content {
	padding: 24px 30px;
}
.download-section {
	margin-bottom: 2px;
}
.download-btn {
	display: inline-block;
	background: var(--primary);
	color: white;
	padding: 11px 24px;
	border-radius: 9px;
	text-decoration: none;
	font-weight: 500;
	font-size: 14.5px;
	margin: 5px 10px 5px 0;
	transition: all 0.3s;
}
.download-btn:hover {
	background: #1e40af;
	transform: translateY(-2px);
}
.install-section {
	margin-top: 2px;
}
.tip {
	background: rgba(16, 185, 129, 0.1);
	border-left: 5px solid var(--success);
	padding: 14px 18px;
	border-radius: 8px;
	margin: 16px 0;
	color: #86efac;
	font-size: 15px;
	text-align: left;
}
.tutorial-image {
	width: 100%;
	max-width: 888px;
	height: auto;
	aspect-ratio: auto;
	min-height: 400px;
	border-radius: 12px;
	margin-top: 10px;
	box-shadow: 0 10px 25px rgba(0, 0, 0, 0.35);
	animation: fadeInImage 0.35s ease-out forwards;
}
 @keyframes fadeInImage {
 from {
 opacity: 0;
 transform: translateY(8px);
}
 to {
 opacity: 1;
 transform: translateY(0);
}
}
footer {
	text-align: center;
	margin-top: 150px;
	color: #c3c3c3;
	font-size: 16px;
}
.footer-nav {
	font-size: 18px;
	color: #b5b5b5;
	text-decoration: none;
	padding-bottom: 20px;
}
.footer-nav a {
	font-size: 18px;
	color: #ffffff;
	text-decoration: none;
}
.footer-nav a:hover {
	color: #e1e1e1;
	text-decoration: underline;
}
.footer-record {
	font-size: 12px;
	color: #60bb96;
	text-decoration: none;
	padding-bottom: 20px;
	text-align: center;
	margin-top: 10px;
}
.footer-record p {
	font-size: 12px;
	color: #c3c3c3;
	text-decoration: none;
	padding-bottom: 6px;
}
.footer-record a {
	font-size: 12px;
	color: #c3c3c3;
	text-decoration: none;
	padding-bottom: 20px;
}
.footer-record a:hover {
	color: #d9d9d9;
}
.mobile-only-tip {
	font-size: 32px;
	font-weight: bold;
	color: #ffffff;
	text-align: center;
	padding: 180px 20px;
	letter-spacing: 2px;
	text-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

@media (max-width: 768px) {
body {
	margin: 0 15px;
}
.tutorial-image {
	min-height: 200px;
}
}
#mac-section, #mobile-section {
	display: none;
}