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

/* CSS Variables for consistent theming */
:root {
	--primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
	--primary-color: #667eea;
	--secondary-color: #764ba2;
	--text-dark: #2d3748;
	--text-light: #4a5568;
	--bg-light: #f8f9fa;
	--white: #ffffff;
	--shadow-light: 0 5px 15px rgba(0, 0, 0, 0.1);
	--shadow-medium: 0 10px 25px rgba(0, 0, 0, 0.15);
	--shadow-heavy: 0 15px 35px rgba(0, 0, 0, 0.2);
	--border-radius: 15px;
	--transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
	--nav-tab-height: 40px;
}

/* Font families */
body {
	font-family: 'Noto Serif', 'Noto Serif SC', serif;
	line-height: 1.6;
	color: var(--text-dark);
	background-color: var(--bg-light);
	overflow-x: hidden;
}

/* Headings use Ubuntu and Noto Sans SC */
h1, h2, h3, h4, h5, h6 {
	font-family: 'Ubuntu', 'Noto Sans SC', sans-serif;
}

/* Code and monospace elements */
code, pre, .mono {
	font-family: 'Maple Mono Normal NF CN', 'Courier New', monospace;
}

/* Animated background */
.animated-bg {
	position: fixed;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	background:
			radial-gradient(circle at 20% 50%, rgba(102, 126, 234, 0.1) 0%, transparent 50%),
			radial-gradient(circle at 80% 20%, rgba(118, 75, 162, 0.1) 0%, transparent 50%),
			radial-gradient(circle at 40% 80%, rgba(102, 126, 234, 0.05) 0%, transparent 50%);
	z-index: -1;
	animation: bgMove 20s ease-in-out infinite;
}

@keyframes bgMove {
	0%, 100% { transform: translate(0, 0) scale(1); }
	33% { transform: translate(-20px, -20px) scale(1.1); }
	66% { transform: translate(20px, -10px) scale(0.9); }
}

/* Header Styles */
header {
	background: var(--primary-gradient);
	color: var(--white);
	padding: 1rem 0;
	position: fixed;
	width: 100%;
	top: 0;
	z-index: 1000;
	box-shadow: var(--shadow-light);
	backdrop-filter: blur(10px);
	transition: var(--transition);
}

nav {
	max-width: 1200px;
	margin: 0 auto;
	padding: 0 2rem;
	display: flex;
	justify-content: space-between;
	align-items: center;
	position: relative;
}

nav h1 {
	font-size: 1.5rem;
	font-weight: 600;
	background: linear-gradient(45deg, var(--white), #e0e7ff);
	-webkit-background-clip: text;
	-webkit-text-fill-color: transparent;
	background-clip: text;
}

/* 导航菜单容器 */
nav ul {
	display: flex;
	list-style: none;
	gap: 2rem;
	position: relative;
	padding: 0.5rem 0;
}

/* 导航链接基础样式 */
nav a {
	color: var(--white);
	text-decoration: none;
	font-weight: 500;
	padding: 0.5rem 1.2rem;
	border-radius: 25px;
	transition: var(--transition);
	position: relative;
	z-index: 2;
	font-size: 0.95rem;
	letter-spacing: 0.5px;
}

/* 白色遮盖tab */
nav ul::before {
	content: '';
	position: absolute;
	top: 0;
	left: 0;
	width: var(--nav-tab-width, 100px);
	height: var(--nav-tab-height);
	background: var(--white);
	border-radius: 25px;
	transition: var(--transition);
	z-index: 1;
	opacity: 0;
	transform: translateY(-5px);
	box-shadow: var(--shadow-light);
}

/* 当有链接被悬停时显示白色tab */
nav ul:hover::before {
	opacity: 1;
	transform: translateY(0);
}

/* 悬停时的文字颜色变化 */
nav a:hover {
	color: var(--primary-color);
	transform: translateY(-2px);
}

/* 激活状态的链接 */
nav a.active {
	color: var(--primary-color);
	font-weight: 600;
}

/* JavaScript控制的白色tab位置 */
.nav-tab-indicator {
	position: absolute;
	top: 0;
	width: var(--nav-tab-width, 100px);
	height: var(--nav-tab-height);
	background: var(--white);
	border-radius: 25px;
	transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
	z-index: 1;
	box-shadow: var(--shadow-light);
	opacity: 0;
	transform: translateY(-5px);
}

.nav-tab-indicator.active {
	opacity: 1;
	transform: translateY(0);
}

/* 导航链接的悬停效果增强 */
nav a::after {
	content: '';
	position: absolute;
	bottom: -2px;
	left: 50%;
	width: 0;
	height: 2px;
	background: var(--primary-color);
	transition: var(--transition);
	transform: translateX(-50%);
}

nav a:hover::after {
	width: 80%;
}

/* Main Content */
main {
	margin-top: 80px;
	max-width: 1200px;
	margin-left: auto;
	margin-right: auto;
	padding: 2rem;
	min-height: calc(100vh - 80px);
}

section {
	margin-bottom: 4rem;
	padding: 2rem 0;
	position: relative;
}

.section-title {
	font-size: 2.5rem;
	margin-bottom: 3rem;
	text-align: center;
	color: var(--text-dark);
	position: relative;
	padding-bottom: 1rem;
}

.section-title::after {
	content: '';
	position: absolute;
	bottom: 0;
	left: 50%;
	transform: translateX(-50%);
	width: 60px;
	height: 4px;
	background: var(--primary-gradient);
	border-radius: 2px;
}

/* Hero Section */
.hero {
	text-align: center;
	padding: 4rem 2rem;
	background: var(--primary-gradient);
	border-radius: var(--border-radius);
	color: var(--white);
	margin-bottom: 3rem;
	position: relative;
	overflow: hidden;
}

.hero::before {
	content: '';
	position: absolute;
	top: -50%;
	left: -50%;
	width: 200%;
	height: 200%;
	background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
	animation: heroPulse 4s ease-in-out infinite;
}

@keyframes heroPulse {
	0%, 100% { transform: scale(1); opacity: 0.5; }
	50% { transform: scale(1.1); opacity: 0.8; }
}

.hero-content {
	position: relative;
	z-index: 1;
}

.hero h2 {
	font-size: 3rem;
	margin-bottom: 1rem;
	color: var(--white);
}

.hero p {
	font-size: 1.2rem;
	margin-bottom: 2rem;
	opacity: 0.9;
}

.cta-button {
	background: var(--white);
	color: var(--primary-color);
	border: none;
	padding: 1rem 2rem;
	font-size: 1.1rem;
	border-radius: 50px;
	cursor: pointer;
	font-weight: 600;
	transition: var(--transition);
	display: inline-flex;
	align-items: center;
	gap: 0.5rem;
	position: relative;
	overflow: hidden;
}

.cta-button::before {
	content: '';
	position: absolute;
	top: 0;
	left: -100%;
	width: 100%;
	height: 100%;
	background: var(--primary-gradient);
	transition: var(--transition);
	z-index: 0;
}

.cta-button:hover::before {
	left: 0;
}

.cta-button:hover {
	transform: translateY(-3px);
	box-shadow: var(--shadow-medium);
	color: var(--white);
}

.cta-button span, .cta-button i {
	position: relative;
	z-index: 1;
}

.cta-button i {
	transition: transform 0.3s ease;
}

.cta-button:hover i {
	transform: translateX(3px);
}

/* Floating elements in hero */
.hero-visual {
	margin-top: 2rem;
}

.floating-elements {
	display: flex;
	justify-content: center;
	gap: 2rem;
	flex-wrap: wrap;
}

.float-element {
	width: 60px;
	height: 60px;
	background: rgba(255, 255, 255, 0.2);
	border-radius: 50%;
	display: flex;
	align-items: center;
	justify-content: center;
	font-size: 1.5rem;
	animation: float 3s ease-in-out infinite;
}

.float-element:nth-child(1) { animation-delay: 0s; }
.float-element:nth-child(2) { animation-delay: 1s; }
.float-element:nth-child(3) { animation-delay: 2s; }

@keyframes float {
	0%, 100% { transform: translateY(0px); }
	50% { transform: translateY(-10px); }
}

/* About Section */
.about-content {
	max-width: 800px;
	margin: 0 auto;
	text-align: center;
}

.about-card {
	background: var(--white);
	padding: 3rem;
	border-radius: var(--border-radius);
	box-shadow: var(--shadow-light);
	transition: var(--transition);
	position: relative;
	overflow: hidden;
}

.about-card::before {
	content: '';
	position: absolute;
	top: 0;
	left: 0;
	right: 0;
	height: 4px;
	background: var(--primary-gradient);
}

.about-card:hover {
	transform: translateY(-5px);
	box-shadow: var(--shadow-medium);
}

.about-icon {
	width: 80px;
	height: 80px;
	background: var(--primary-gradient);
	border-radius: 50%;
	display: flex;
	align-items: center;
	justify-content: center;
	margin: 0 auto 2rem;
	font-size: 2rem;
	color: var(--white);
}

.about-content p {
	font-size: 1.1rem;
	margin-bottom: 1rem;
	color: var(--text-light);
}

/* Projects Section */
.projects-grid {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
	gap: 2rem;
	margin-top: 2rem;
}

.project-card {
	background: var(--white);
	padding: 2rem;
	border-radius: var(--border-radius);
	box-shadow: var(--shadow-light);
	transition: var(--transition);
	position: relative;
	overflow: hidden;
}

.project-card::before {
	content: '';
	position: absolute;
	top: 0;
	left: 0;
	right: 0;
	height: 3px;
	background: var(--primary-gradient);
	transform: scaleX(0);
	transition: transform 0.3s ease;
}

.project-card:hover::before {
	transform: scaleX(1);
}

.project-card:hover {
	transform: translateY(-8px);
	box-shadow: var(--shadow-heavy);
}

.project-icon {
	width: 60px;
	height: 60px;
	background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
	border-radius: 12px;
	display: flex;
	align-items: center;
	justify-content: center;
	margin-bottom: 1.5rem;
	font-size: 1.5rem;
	color: var(--white);
}

.project-card h3 {
	color: var(--text-dark);
	margin-bottom: 1rem;
	font-size: 1.5rem;
}

.project-card p {
	color: var(--text-light);
	margin-bottom: 1.5rem;
}

.project-link {
	color: var(--primary-color);
	text-decoration: none;
	font-weight: 600;
	transition: var(--transition);
	display: inline-flex;
	align-items: center;
	gap: 0.5rem;
	padding: 0.5rem 1rem;
	border-radius: 25px;
	background: rgba(102, 126, 234, 0.1);
}

.project-link:hover {
	color: var(--white);
	background: var(--primary-gradient);
	transform: translateX(5px);
}

.project-link i {
	transition: transform 0.3s ease;
}

.project-link:hover i {
	transform: translateX(3px);
}

/* Contact Section */
.contact-info {
	text-align: center;
	max-width: 600px;
	margin: 0 auto;
}

.contact-item {
	margin-bottom: 2rem;
}

.contact-link {
	background: var(--white);
	padding: 2rem;
	border-radius: var(--border-radius);
	box-shadow: var(--shadow-light);
	transition: var(--transition);
	display: flex;
	align-items: center;
	gap: 1.5rem;
	text-decoration: none;
	color: var(--text-dark);
	position: relative;
	overflow: hidden;
}

.contact-link::before {
	content: '';
	position: absolute;
	top: 0;
	left: -100%;
	width: 100%;
	height: 100%;
	background: var(--primary-gradient);
	transition: var(--transition);
	z-index: 0;
}

.contact-link:hover::before {
	left: 0;
}

.contact-link:hover {
	transform: translateY(-5px);
	box-shadow: var(--shadow-medium);
	color: var(--white);
}

.contact-icon, .contact-text, .contact-arrow {
	position: relative;
	z-index: 1;
}

.contact-icon {
	width: 50px;
	height: 50px;
	background: rgba(102, 126, 234, 0.1);
	border-radius: 12px;
	display: flex;
	align-items: center;
	justify-content: center;
	font-size: 1.2rem;
	color: var(--primary-color);
	transition: var(--transition);
}

.contact-link:hover .contact-icon {
	background: rgba(255, 255, 255, 0.2);
	color: var(--white);
}

.contact-text {
	text-align: left;
	flex: 1;
}

.contact-text h3 {
	margin-bottom: 0.5rem;
	color: var(--text-dark);
	transition: color 0.3s ease;
}

.contact-link:hover .contact-text h3 {
	color: var(--white);
}

.contact-text p {
	color: var(--text-light);
	transition: color 0.3s ease;
}

.contact-link:hover .contact-text p {
	color: rgba(255, 255, 255, 0.9);
}

.contact-arrow {
	color: var(--primary-color);
	transition: var(--transition);
}

.contact-link:hover .contact-arrow {
	color: var(--white);
	transform: translateX(5px);
}

/* Footer */
footer {
	background: var(--text-dark);
	color: var(--white);
	text-align: center;
	padding: 2rem;
	margin-top: 4rem;
}

.footer-content {
	max-width: 1200px;
	margin: 0 auto;
}

.footer-links {
	margin-top: 1rem;
	display: flex;
	justify-content: center;
	gap: 2rem;
	flex-wrap: wrap;
}

.footer-links a {
	color: var(--white);
	text-decoration: none;
	transition: var(--transition);
	padding: 0.5rem 1rem;
	border-radius: 20px;
}

.footer-links a:hover {
	background: rgba(255, 255, 255, 0.1);
	transform: translateY(-2px);
}

/* Animations */
.animate-text {
	opacity: 0;
	transform: translateY(30px);
	animation: textFadeIn 1s ease forwards;
}

.animate-text:nth-child(1) { animation-delay: 0.2s; }
.animate-text:nth-child(2) { animation-delay: 0.4s; }
.animate-text:nth-child(3) { animation-delay: 0.6s; }

@keyframes textFadeIn {
	to {
		opacity: 1;
		transform: translateY(0);
	}
}

/* Responsive Design */
@media (max-width: 768px) {
	nav {
		flex-direction: column;
		gap: 1rem;
		padding: 1rem;
	}

	nav h1 {
		font-size: 1.2rem;
		text-align: center;
	}

	nav ul {
		gap: 1rem;
		flex-wrap: wrap;
		justify-content: center;
		padding: 0.3rem 0;
	}

	nav a {
		padding: 0.4rem 1rem;
		font-size: 0.9rem;
	}

	.nav-tab-indicator,
	nav ul::before {
		height: 35px;
		border-radius: 20px;
	}

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

	.hero p {
		font-size: 1rem;
	}

	.section-title {
		font-size: 2rem;
	}

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

	main {
		padding: 1rem;
		margin-top: 120px;
	}

	section {
		margin-bottom: 2rem;
	}

	.contact-link {
		flex-direction: column;
		text-align: center;
		gap: 1rem;
	}

	.contact-text {
		text-align: center;
	}

	.footer-links {
		flex-direction: column;
		gap: 1rem;
	}

	.floating-elements {
		gap: 1rem;
	}

	.float-element {
		width: 50px;
		height: 50px;
		font-size: 1.2rem;
	}
}

@media (max-width: 480px) {
	.hero {
		padding: 2rem 1rem;
	}

	.hero h2 {
		font-size: 1.5rem;
	}

	.about-card, .project-card, .contact-link {
		padding: 1.5rem;
	}

	.cta-button {
		padding: 0.8rem 1.5rem;
		font-size: 1rem;
	}
}