:root {
    --primary-color: #4CAF50; /* 绿色 */
    --secondary-color: #2196F3; /* 蓝色 */
    --accent-color: #1976D2; /* 深蓝色 */
    --light-color: #FFFFFF; /* 白色 */
    --text-color: #333333;
    --light-text: #FFFFFF;
    --light-bg: #F5F5F5;
    --border-radius: 8px;
    --box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

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

body {
    font-family: 'Poppins', sans-serif;
    color: var(--text-color);
    line-height: 1.6;
    background-color: var(--light-color);
}

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

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
}

/* Header Styles */
header {
    background-color: var(--light-color);
    padding: 20px 0;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
}

.logo img {
    height: 40px;
    margin-right: 10px;
}

.logo span {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary-color);
}

.nav-links {
    display: flex;
    gap: 20px;
}

.nav-links a {
    padding: 8px 15px;
    border-radius: var(--border-radius);
    transition: all 0.3s ease;
}

.nav-links a:hover {
    background-color: var(--primary-color);
    color: var(--light-text);
}

/* Hero Section */
.hero {
    padding: 80px 0;
    background: linear-gradient(135deg, var(--light-bg) 0%, #E8F5E9 100%);
}

.hero .container {
    display: flex;
    align-items: center;
    gap: 40px;
}

.hero-content {
    flex: 1;
}

.hero-image {
    flex: 1;
    display: flex;
    justify-content: center;
}

.hero-image img {
    max-height: 600px;
    border-radius: 20px;
    box-shadow: var(--box-shadow);
}

h1 {
    font-size: 2.5rem;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 30px;
}

.cta-buttons {
    display: flex;
    gap: 15px;
}

.btn {
    padding: 12px 24px;
    border-radius: var(--border-radius);
    font-weight: 500;
    text-align: center;
    transition: all 0.3s ease;
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--light-text);
}

.btn-secondary {
    background-color: var(--light-color);
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--box-shadow);
}

/* Features Section */
.features {
    padding: 80px 0;
    background-color: var(--light-color);
}

h2 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 50px;
    color: var(--primary-color);
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.feature-card {
    padding: 30px;
    background-color: var(--light-bg);
    border-radius: var(--border-radius);
    transition: all 0.3s ease;
    box-shadow: var(--box-shadow);
    text-align: center;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.15);
}

.feature-icon {
    margin-bottom: 20px;
}

.feature-icon img {
    height: 60px;
}

.feature-card h3 {
    margin-bottom: 15px;
    color: var(--primary-color);
}

/* Screenshots Section */
.screenshots {
    padding: 80px 0;
    background: linear-gradient(135deg, #E3F2FD 0%, var(--light-bg) 100%);
}

.screenshot-carousel {
    display: flex;
    gap: 20px;
    overflow-x: auto;
    padding: 20px 0;
    scroll-snap-type: x mandatory;
}

.screenshot {
    flex: 0 0 auto;
    width: 280px;
    scroll-snap-align: center;
}

.screenshot img {
    border-radius: 15px;
    box-shadow: var(--box-shadow);
}

/* Testimonials Section */
.testimonials {
    padding: 80px 0;
    background-color: var(--light-color);
}

.testimonial-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.testimonial-card {
    padding: 30px;
    background-color: var(--light-bg);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

.quote {
    font-style: italic;
    margin-bottom: 15px;
    position: relative;
}

.quote::before {
    content: '"';
    font-size: 3rem;
    color: var(--primary-color);
    opacity: 0.2;
    position: absolute;
    top: -20px;
    left: -15px;
}

.author {
    text-align: right;
    font-weight: 500;
    color: var(--primary-color);
}

/* Download Section */
.download {
    padding: 80px 0;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: var(--light-text);
    text-align: center;
}

.download h2 {
    color: var(--light-text);
}

.download p {
    font-size: 1.2rem;
    margin-bottom: 30px;
}

.download-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.download-btn {
    display: flex;
    align-items: center;
    background-color: var(--light-color);
    color: var(--text-color);
    padding: 8px 20px;
    border-radius: var(--border-radius);
    transition: all 0.3s ease;
}

.download-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.2);
}

.download-btn img {
    height: 30px;
    margin-right: 10px;
}

/* Footer */
footer {
    background-color: var(--text-color);
    color: var(--light-text);
    padding: 50px 0 20px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    margin-bottom: 30px;
}

.footer-logo {
    display: flex;
    align-items: center;
}

.footer-logo img {
    height: 30px;
    margin-right: 10px;
}

.footer-links ul {
    display: flex;
    gap: 20px;
}

.footer-links a:hover {
    color: var(--primary-color);
}

.copyright {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero .container {
        flex-direction: column;
    }

    .nav-links {
        display: none;
    }

    .hero-content {
        text-align: center;
    }

    .cta-buttons {
        justify-content: center;
    }

    .footer-content {
        flex-direction: column;
        gap: 20px;
    }
}