/* 重置和基础样式 */
* {
	margin: 0;
	padding: 0;
	box-sizing: border-box;
}

html {
	scroll-behavior: smooth;
}

body {
	font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
	line-height: 1.6;
	color: #333;
	overflow-x: hidden;
}

.container {
	max-width: 1200px;
	margin: 0 auto;
	padding: 0 20px;
}

/* 导航栏 */
.header {
	background: rgba(255, 255, 255, 0.95);
	backdrop-filter: blur(20px);
	box-shadow: 0 2px 20px rgba(0,0,0,0.1);
	position: fixed;
	top: 0;
	left: 0;
	right: 0;
	z-index: 1000;
	transition: all 0.3s ease;
}

.nav-container {
	display: flex;
	justify-content: space-between;
	align-items: center;
	padding: 1rem 0;
}

.nav-logo {
	display: flex;
	align-items: center;
	gap: 0.75rem;
}

.logo {
	width: 40px;
	height: 40px;
	background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
	border-radius: 10px;
	display: flex;
	align-items: center;
	justify-content: center;
	color: white;
	font-weight: bold;
	font-size: 16px;
}

.nav-logo h1 {
	font-size: 1.5rem;
	font-weight: 700;
	background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
	-webkit-background-clip: text;
	-webkit-text-fill-color: transparent;
	background-clip: text;
}

.nav-menu {
	display: flex;
	list-style: none;
	gap: 2rem;
}

.nav-menu a {
	text-decoration: none;
	color: #333;
	font-weight: 500;
	padding: 0.5rem 1rem;
	border-radius: 8px;
	transition: all 0.3s ease;
}

.nav-menu a:hover {
	background: rgba(102, 126, 234, 0.1);
	color: #667eea;
}

.nav-toggle {
	display: none;
	flex-direction: column;
	cursor: pointer;
}

.nav-toggle span {
	width: 25px;
	height: 3px;
	background: #333;
	margin: 3px 0;
	transition: 0.3s;
}

/* 按钮样式 */
.btn {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	padding: 12px 24px;
	border-radius: 12px;
	text-decoration: none;
	font-weight: 600;
	font-size: 1rem;
	transition: all 0.3s ease;
	border: none;
	cursor: pointer;
	text-align: center;
	min-width: 120px;
}

.btn-primary {
	background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
	color: white;
	box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.btn-primary:hover {
	transform: translateY(-2px);
	box-shadow: 0 8px 25px rgba(102, 126, 234, 0.6);
}

.btn-secondary {
	background: transparent;
	color: #667eea;
	border: 2px solid #667eea;
}

.btn-secondary:hover {
	background: #667eea;
	color: white;
	transform: translateY(-2px);
}

.btn-outline {
	background: transparent;
	color: #333;
	border: 2px solid #e0e6ed;
}

.btn-outline:hover {
	background: #f8f9fa;
	border-color: #667eea;
	color: #667eea;
	transform: translateY(-2px);
}

.btn-large {
	padding: 16px 32px;
	font-size: 1.1rem;
}

.btn-full {
	width: 100%;
}

/* 主页英雄区 */
.hero {
	background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
	color: white;
	padding: 140px 0 100px;
	margin-top: 70px;
	position: relative;
	overflow: hidden;
}

.hero::before {
	content: '';
	position: absolute;
	top: 0;
	left: 0;
	right: 0;
	bottom: 0;
	background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="50" cy="50" r="1" fill="white" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
	opacity: 0.3;
}

.hero .container {
	display: grid;
	grid-template-columns: 1fr 1fr;
	gap: 4rem;
	align-items: center;
	position: relative;
	z-index: 2;
}

.hero-content h2 {
	font-size: 3.5rem;
	font-weight: 700;
	margin-bottom: 1.5rem;
	line-height: 1.2;
}

.hero-content p {
	font-size: 1.3rem;
	margin-bottom: 2.5rem;
	opacity: 0.9;
	line-height: 1.6;
}

.cta-buttons {
	display: flex;
	gap: 1rem;
	flex-wrap: wrap;
}

.hero-visual {
	position: relative;
	height: 400px;
}

.floating-card {
	position: absolute;
	background: rgba(255, 255, 255, 0.1);
	backdrop-filter: blur(20px);
	border: 1px solid rgba(255, 255, 255, 0.2);
	border-radius: 16px;
	padding: 1.5rem;
	animation: float 6s ease-in-out infinite;
}

.floating-card:nth-child(1) {
	top: 20px;
	left: 20px;
	animation-delay: 0s;
}

.floating-card:nth-child(2) {
	top: 120px;
	right: 40px;
	animation-delay: 2s;
}

.floating-card:nth-child(3) {
	bottom: 60px;
	left: 60px;
	animation-delay: 4s;
}

@keyframes float {
	0%, 100% { transform: translateY(0px) rotate(0deg); }
	50% { transform: translateY(-20px) rotate(2deg); }
}

.card-content h3 {
	font-size: 1.1rem;
	margin-bottom: 0.5rem;
}

.card-content p {
	font-size: 0.9rem;
	opacity: 0.8;
}

/* 关于我们 */
.about {
	padding: 100px 0;
	background: #f8f9fa;
}

.about h2 {
	text-align: center;
	font-size: 2.8rem;
	font-weight: 700;
	margin-bottom: 1rem;
	color: #333;
}

.section-subtitle {
	text-align: center;
	font-size: 1.2rem;
	color: #666;
	margin-bottom: 4rem;
}

.about-content {
	display: grid;
	grid-template-columns: 1fr 1fr;
	gap: 5rem;
	align-items: start;
}

.about-text h3 {
	font-size: 1.8rem;
	margin-bottom: 1.5rem;
	color: #333;
}

.about-text p {
	font-size: 1.1rem;
	margin-bottom: 1.5rem;
	color: #666;
	line-height: 1.8;
}

.stats {
	display: grid;
	grid-template-columns: repeat(3, 1fr);
	gap: 2rem;
	margin-top: 2rem;
}

.stat-item {
	text-align: center;
	padding: 1.5rem;
	background: white;
	border-radius: 12px;
	box-shadow: 0 4px 20px rgba(0,0,0,0.1);
}

.stat-item h4 {
	font-size: 2rem;
	font-weight: 700;
	color: #667eea;
	margin-bottom: 0.5rem;
}

.stat-item p {
	color: #666;
}

.about-features {
	display: grid;
	grid-template-columns: 1fr 1fr;
	gap: 2rem;
}

.feature {
	background: white;
	padding: 2rem;
	border-radius: 16px;
	box-shadow: 0 4px 20px rgba(0,0,0,0.1);
	transition: transform 0.3s ease;
}

.feature:hover {
	transform: translateY(-5px);
}

.feature-icon {
	font-size: 2.5rem;
	margin-bottom: 1rem;
}

.feature h3 {
	font-size: 1.3rem;
	margin-bottom: 1rem;
	color: #333;
}

.feature p {
	color: #666;
	line-height: 1.6;
}

/* 产品展示 */
.products {
	padding: 100px 0;
}

.products h2 {
	text-align: center;
	font-size: 2.8rem;
	font-weight: 700;
	margin-bottom: 1rem;
	color: #333;
}

.product-grid {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
	gap: 2.5rem;
	margin-top: 4rem;
}

.product-card {
	background: white;
	padding: 2.5rem;
	border-radius: 20px;
	box-shadow: 0 8px 30px rgba(0,0,0,0.1);
	text-align: center;
	transition: all 0.3s ease;
	border: 1px solid #f0f0f0;
}

.product-card:hover {
	transform: translateY(-10px);
	box-shadow: 0 20px 40px rgba(0,0,0,0.15);
}

.product-icon {
	font-size: 3rem;
	margin-bottom: 1.5rem;
}

.product-card h3 {
	font-size: 1.5rem;
	margin-bottom: 1rem;
	color: #333;
}

.product-card p {
	color: #666;
	margin-bottom: 1.5rem;
	line-height: 1.6;
}

.product-features {
	list-style: none;
	margin: 1.5rem 0;
}

.product-features li {
	padding: 0.5rem 0;
	color: #555;
	position: relative;
	padding-left: 1.5rem;
}

.product-features li::before {
	content: '✓';
	position: absolute;
	left: 0;
	color: #667eea;
	font-weight: bold;
}

/* 联系我们 */
.contact {
	padding: 100px 0;
	background: #f8f9fa;
}

.contact h2 {
	text-align: center;
	font-size: 2.8rem;
	font-weight: 700;
	margin-bottom: 1rem;
	color: #333;
}

.contact-content {
	display: grid;
	grid-template-columns: 1fr 1fr;
	gap: 5rem;
	margin-top: 4rem;
}

.contact-info h3,
.contact-form h3 {
	font-size: 1.5rem;
	margin-bottom: 2rem;
	color: #333;
}

.contact-item {
	display: flex;
	align-items: flex-start;
	gap: 1rem;
	margin-bottom: 2rem;
	background: white;
	padding: 1.5rem;
	border-radius: 12px;
	box-shadow: 0 4px 20px rgba(0,0,0,0.1);
}

.contact-icon {
	font-size: 1.5rem;
	width: 40px;
	height: 40px;
	background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
	border-radius: 10px;
	display: flex;
	align-items: center;
	justify-content: center;
	flex-shrink: 0;
}

.contact-item h4 {
	margin-bottom: 0.5rem;
	color: #333;
}

.contact-item p {
	color: #666;
	margin: 0;
}

.form {
	background: white;
	padding: 2rem;
	border-radius: 16px;
	box-shadow: 0 8px 30px rgba(0,0,0,0.1);
}

.form-group {
	margin-bottom: 1.5rem;
}

.form input,
.form textarea,
.form select {
	width: 100%;
	padding: 15px;
	border: 2px solid #e0e6ed;
	border-radius: 12px;
	font-size: 1rem;
	transition: all 0.3s ease;
	background: #fafbfc;
}

.form input:focus,
.form textarea:focus,
.form select:focus {
	outline: none;
	border-color: #667eea;
	background: white;
	box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

/* 应用页面样式 */
.app-page {
	margin-top: 70px;
}

.app-hero {
	padding: 100px 0;
	background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
	color: white;
}

.app-hero .container {
	display: grid;
	grid-template-columns: 1fr 1fr;
	gap: 4rem;
	align-items: center;
}

.app-icon {
	font-size: 6rem;
	margin-bottom: 2rem;
	display: block;
}

.app-hero h1 {
	font-size: 3rem;
	font-weight: 700;
	margin-bottom: 1rem;
}

.app-description {
	font-size: 1.3rem;
	margin-bottom: 1.5rem;
	opacity: 0.9;
}

.app-meta {
	display: flex;
	gap: 2rem;
	margin-bottom: 2.5rem;
	font-size: 1.1rem;
}

.rating, .downloads {
	opacity: 0.9;
}

.download-buttons {
	display: flex;
	flex-direction: column;
	gap: 1rem;
	max-width: 300px;
}

.download-btn {
	display: flex;
	align-items: center;
	gap: 1rem;
	padding: 15px 20px;
	background: rgba(255,255,255,0.1);
	color: white;
	text-decoration: none;
	border-radius: 16px;
	border: 2px solid rgba(255,255,255,0.3);
	transition: all 0.3s ease;
	backdrop-filter: blur(20px);
}

.download-btn:hover {
	background: rgba(255,255,255,0.2);
	transform: translateY(-2px);
	box-shadow: 0 8px 25px rgba(0,0,0,0.2);
}

.btn-icon {
	font-size: 2rem;
}

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

.btn-text small {
	font-size: 0.8rem;
	opacity: 0.8;
}

.btn-text strong {
	font-size: 1.1rem;
	font-weight: 600;
}

.share-btn {
	background: rgba(255,255,255,0.1);
	color: white;
	border: 2px solid rgba(255,255,255,0.3);
	padding: 12px 20px;
	border-radius: 12px;
	cursor: pointer;
	transition: all 0.3s ease;
	font-size: 1rem;
	margin-top: 1rem;
}

.share-btn:hover {
	background: rgba(255,255,255,0.2);
}

.phone-mockup {
	display: flex;
	justify-content: center;
}

.phone-screen {
	width: 280px;
	height: 560px;
	background: #000;
	border-radius: 40px;
	border: 8px solid #333;
	display: flex;
	align-items: center;
	justify-content: center;
	position: relative;
	overflow: hidden;
}

.screen-content {
	width: 100%;
	height: 100%;
	background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
	display: flex;
	align-items: center;
	justify-content: center;
	color: white;
	text-align: center;
}

.app-demo h3 {
	font-size: 1.5rem;
	margin-bottom: 2rem;
}

.demo-features {
	display: flex;
	flex-direction: column;
	gap: 1rem;
}

.demo-item {
	padding: 0.8rem;
	background: rgba(255,255,255,0.1);
	border-radius: 8px;
	font-size: 0.9rem;
}

.app-features {
	padding: 100px 0;
	background: #f8f9fa;
}

.app-features h2 {
	text-align: center;
	font-size: 2.8rem;
	font-weight: 700;
	margin-bottom: 4rem;
	color: #333;
}

.features-grid {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
	gap: 2.5rem;
}

.feature-item {
	background: white;
	padding: 2.5rem;
	border-radius: 20px;
	text-align: center;
	box-shadow: 0 8px 30px rgba(0,0,0,0.1);
	transition: transform 0.3s ease;
}

.feature-item:hover {
	transform: translateY(-5px);
}

.feature-item .feature-icon {
	font-size: 3rem;
	margin-bottom: 1.5rem;
}

.feature-item h3 {
	font-size: 1.3rem;
	margin-bottom: 1rem;
	color: #333;
}

.feature-item p {
	color: #666;
	line-height: 1.6;
}

.app-screenshots {
	padding: 100px 0;
}

.app-screenshots h2 {
	text-align: center;
	font-size: 2.8rem;
	font-weight: 700;
	margin-bottom: 4rem;
	color: #333;
}

.screenshots-grid {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
	gap: 2rem;
}

.screenshot-item {
	text-align: center;
}

.screenshot-placeholder {
	width: 200px;
	height: 350px;
	background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
	border-radius: 20px;
	margin: 0 auto 1rem;
	display: flex;
	flex-direction: column;
	align-items: center;
	justify-content: center;
	color: white;
}

.screenshot-placeholder span {
	font-size: 3rem;
	margin-bottom: 1rem;
}

.screenshot-placeholder p {
	font-size: 1.1rem;
	font-weight: 600;
}

.app-cta {
	padding: 100px 0;
	background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
	color: white;
	text-align: center;
}

.cta-content h2 {
	font-size: 2.5rem;
	font-weight: 700;
	margin-bottom: 1rem;
}

.cta-content p {
	font-size: 1.2rem;
	margin-bottom: 2.5rem;
	opacity: 0.9;
}

.cta-buttons {
	display: flex;
	gap: 1rem;
	justify-content: center;
	flex-wrap: wrap;
}

.cta-buttons .btn-primary {
	background: white;
	color: #667eea;
}

.cta-buttons .btn-primary:hover {
	background: #f8f9fa;
}

.cta-buttons .btn-secondary {
	background: transparent;
	color: white;
	border-color: white;
}

.cta-buttons .btn-secondary:hover {
	background: white;
	color: #667eea;
}

/* 页脚 */
.footer {
	background: #1a1a1a;
	color: white;
	padding: 3rem 0 1rem;
}

.footer-content {
	display: grid;
	grid-template-columns: 1fr 2fr;
	gap: 3rem;
	margin-bottom: 2rem;
}

.footer-logo .logo {
	margin-bottom: 1rem;
}

.footer-logo h3 {
	font-size: 1.5rem;
	margin-bottom: 0.5rem;
	background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
	-webkit-background-clip: text;
	-webkit-text-fill-color: transparent;
	background-clip: text;
}

.footer-logo p {
	color: #ccc;
}

.footer-links {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
	gap: 2rem;
}

.footer-section h4 {
	margin-bottom: 1rem;
	color: white;
}

.footer-section ul {
	list-style: none;
}

.footer-section li {
	margin-bottom: 0.5rem;
}

.footer-section a {
	color: #ccc;
	text-decoration: none;
	transition: color 0.3s ease;
}

.footer-section a:hover {
	color: #667eea;
}

.footer-bottom {
	border-top: 1px solid #333;
	padding-top: 1rem;
	text-align: center;
	color: #999;
}

/* 响应式设计 */
@media (max-width: 768px) {
	.nav-menu {
		position: fixed;
		top: 70px;
		left: -100%;
		width: 100%;
		height: calc(100vh - 70px);
		background: rgba(255, 255, 255, 0.95);
		backdrop-filter: blur(20px);
		flex-direction: column;
		justify-content: flex-start;
		align-items: center;
		padding: 2rem;
		transition: left 0.3s ease;
	}

	.nav-menu.active {
		left: 0;
	}

	.nav-toggle {
		display: flex;
	}

	.hero .container,
	.about-content,
	.contact-content,
	.app-hero .container,
	.footer-content {
		grid-template-columns: 1fr;
		gap: 2rem;
	}

	.hero-content h2 {
		font-size: 2.5rem;
	}

	.hero-content p {
		font-size: 1.1rem;
	}

	.about-features {
		grid-template-columns: 1fr;
	}

	.stats {
		grid-template-columns: 1fr;
	}

	.cta-buttons,
	.download-buttons {
		flex-direction: column;
		align-items: center;
	}

	.phone-screen {
		width: 220px;
		height: 440px;
	}

	.floating-card {
		position: relative;
		margin: 1rem;
		animation: none;
	}

	.hero-visual {
		height: auto;
		display: flex;
		flex-direction: column;
		align-items: center;
	}
}

@media (max-width: 480px) {
	.container {
		padding: 0 15px;
	}

	.hero {
		padding: 120px 0 80px;
	}

	.hero-content h2 {
		font-size: 2rem;
	}

	.about,
	.products,
	.contact,
	.app-features,
	.app-screenshots,
	.app-cta {
		padding: 80px 0;
	}

	.about h2,
	.products h2,
	.contact h2,
	.app-features h2,
	.app-screenshots h2 {
		font-size: 2rem;
	}

	.app-hero h1 {
		font-size: 2rem;
	}

	.btn {
		padding: 10px 20px;
		font-size: 0.9rem;
	}

	.btn-large {
		padding: 14px 28px;
		font-size: 1rem;
	}
}

/* 动画和过渡效果 */
.fade-in {
	opacity: 0;
	transform: translateY(30px);
	transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
	opacity: 1;
	transform: translateY(0);
}

/* 滚动指示器 */
.scroll-indicator {
	position: fixed;
	top: 70px;
	left: 0;
	width: 100%;
	height: 3px;
	background: rgba(102, 126, 234, 0.2);
	z-index: 999;
}

.scroll-progress {
	height: 100%;
	background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
	transition: width 0.3s ease;
}

/* 加载动画 */
.loading {
	position: fixed;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	background: white;
	display: flex;
	align-items: center;
	justify-content: center;
	z-index: 9999;
	transition: opacity 0.5s ease;
}

.loading.hidden {
	opacity: 0;
	pointer-events: none;
}

.loading-spinner {
	width: 50px;
	height: 50px;
	border: 4px solid #f3f3f3;
	border-top: 4px solid #667eea;
	border-radius: 50%;
	animation: spin 1s linear infinite;
}

@keyframes spin {
	0% { transform: rotate(0deg); }
	100% { transform: rotate(360deg); }
}