/* CSS Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* 主色调 */
    --primary-gradient: linear-gradient(135deg, #4F46E5 0%, #7C3AED 100%);
    --secondary-gradient: linear-gradient(135deg, #F59E0B 0%, #EF4444 100%);
    
    /* 颜色 */
    --primary-color: #4F46E5;
    --secondary-color: #7C3AED;
    --accent-color: #F59E0B;
    --text-dark: #1F2937;
    --text-light: #6B7280;
    --text-white: #FFFFFF;
    --bg-light: #F9FAFB;
    --bg-white: #FFFFFF;
    --bg-dark: #111827;
    
    /* 字体 */
    --font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    
    /* 间距 */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
    
    /* 阴影 */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* 边框半径 */
    --border-radius-sm: 0.375rem;
    --border-radius-md: 0.5rem;
    --border-radius-lg: 0.75rem;
    --border-radius-xl: 1rem;
    
    /* 过渡 */
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-white);
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

/* 导航栏 */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    z-index: 1000;
    transition: var(--transition);
}

.nav {
    padding: var(--spacing-sm) 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.logo-img {
    width: 40px;
    height: 40px;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
    align-items: center;
}

.nav-link {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-link:hover {
    color: var(--primary-color);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-gradient);
    transition: var(--transition);
}

.nav-link:hover::after {
    width: 100%;
}

.nav-cta {
    background: var(--primary-gradient);
    color: var(--text-white) !important;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-lg);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    border: none;
    cursor: pointer;
}

.nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    color: var(--text-white) !important;
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 4px;
    cursor: pointer;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--text-dark);
    transition: var(--transition);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--primary-gradient);
    opacity: 0.1;
}

.hero-bg::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 20%, rgba(79, 70, 229, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(124, 58, 237, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(245, 158, 11, 0.05) 0%, transparent 50%);
}

.hero-content {
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-sm);
    max-width: 800px;
    margin: 0 auto;
    z-index: 1;
    position: relative;
}

.hero-title {
    font-size: 4rem;
    font-weight: 800;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-sm);
    animation: fadeInUp 0.8s ease;
}

.hero-subtitle {
    font-size: 2rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: var(--spacing-sm);
    animation: fadeInUp 0.8s ease 0.2s both;
}

.hero-description {
    font-size: 1.25rem;
    color: var(--text-light);
    margin-bottom: var(--spacing-md);
    animation: fadeInUp 0.8s ease 0.4s both;
}

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    background: var(--primary-gradient);
    color: var(--text-white);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius-xl);
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    animation: fadeInUp 0.8s ease 0.6s both;
}

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

.cta-arrow {
    transition: var(--transition);
}

.cta-button:hover .cta-arrow {
    transform: translateX(5px);
}

.scroll-indicator {
    position: absolute;
    bottom: var(--spacing-md);
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
}

.scroll-arrow {
    width: 30px;
    height: 30px;
    border: 2px solid var(--primary-color);
    border-radius: 50%;
    position: relative;
}

.scroll-arrow::before {
    content: '';
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 8px;
    height: 8px;
    border-right: 2px solid var(--primary-color);
    border-bottom: 2px solid var(--primary-color);
    transform: translateX(-50%) rotate(45deg);
}

/* Section Headers */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: var(--spacing-sm);
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    font-size: 1.25rem;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
}

/* About Section */
.about {
    padding: var(--spacing-xl) 0;
    background: var(--bg-light);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.about-text {
    animation: fadeInLeft 0.8s ease;
}

.about-description {
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

.tech-badges {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.badge {
    background: var(--primary-gradient);
    color: var(--text-white);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-xl);
    font-size: 0.9rem;
    font-weight: 600;
}

.about-visual {
    display: flex;
    justify-content: center;
    animation: fadeInRight 0.8s ease;
}

.code-preview {
    background: var(--bg-dark);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    max-width: 400px;
    width: 100%;
}

.code-header {
    display: flex;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm);
    background: #2D3748;
}

.code-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.code-dot.red { background: #FC8181; }
.code-dot.yellow { background: #F6E05E; }
.code-dot.green { background: #68D391; }

.code-content {
    padding: var(--spacing-md);
    color: #E2E8F0;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    line-height: 1.6;
}

/* Features Section */
.features {
    padding: var(--spacing-xl) 0;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.feature-card {
    background: var(--bg-white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    text-align: center;
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.feature-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto var(--spacing-md);
    background: var(--primary-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-white);
}

.feature-icon svg {
    width: 30px;
    height: 30px;
}

.feature-title {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: var(--spacing-sm);
}

.feature-description {
    color: var(--text-light);
    line-height: 1.6;
}

.cta-section {
    text-align: center;
    padding: var(--spacing-lg) 0;
}

/* Inspiration Section */
.inspiration {
    padding: var(--spacing-xl) 0;
    background: var(--bg-light);
}

.showcase-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.showcase-item {
    background: var(--bg-white);
    border-radius: var(--border-radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.showcase-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.showcase-image {
    height: 250px;
    background: var(--primary-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.showcase-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.showcase-content {
    padding: var(--spacing-md);
}

.showcase-title {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: var(--spacing-sm);
}

.showcase-description {
    color: var(--text-light);
    line-height: 1.6;
    margin-bottom: var(--spacing-sm);
}

.showcase-tags {
    display: flex;
    gap: var(--spacing-xs);
    flex-wrap: wrap;
}

.tag {
    background: rgba(79, 70, 229, 0.1);
    color: var(--primary-color);
    padding: 0.25rem 0.75rem;
    border-radius: var(--border-radius-xl);
    font-size: 0.85rem;
    font-weight: 600;
}

.inspiration-cta {
    text-align: center;
    padding: var(--spacing-lg) 0;
}

.inspiration-text {
    font-size: 1.2rem;
    color: var(--text-dark);
    margin-bottom: var(--spacing-md);
    font-weight: 500;
}

/* Footer */
.footer {
    background: var(--bg-dark);
    color: var(--text-white);
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
}

.footer-brand {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-sm);
}

.footer-logo {
    width: 50px;
    height: 50px;
}

.footer-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-white);
}

.footer-links {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
}

.footer-section h4 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-white);
}

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

.footer-section li {
    margin-bottom: var(--spacing-xs);
}

.footer-section a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: var(--transition);
}

.footer-section a:hover {
    color: var(--text-white);
}

.footer-disclaimer {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.6;
    margin-bottom: var(--spacing-sm);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9rem;
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    40% {
        transform: translateX(-50%) translateY(-10px);
    }
    60% {
        transform: translateX(-50%) translateY(-5px);
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(10px);
        flex-direction: column;
        padding: var(--spacing-md);
        box-shadow: var(--shadow-lg);
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .hamburger {
        display: flex;
    }
    
    .hamburger.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .hamburger.active span:nth-child(2) {
        opacity: 0;
    }
    
    .hamburger.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.5rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .showcase-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .footer-links {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .container {
        padding: 0 var(--spacing-sm);
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1.2rem;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .showcase-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
}