:root {
    --primary-color: #F3BA2F;
    --secondary-color: #1E2026;
    --text-color: #333;
    --light-text: #fff;
    --bg-light: #fff;
    --bg-dark: #0B0E11;
    --grey-light: #f5f5f5;
    --grey-dark: #666;
    --accent-color: #03A66D;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --border-radius: 8px;
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    color: var(--text-color);
    background-color: var(--bg-light);
    line-height: 1.6;
}

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

ul {
    list-style: none;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

/* Header Styles */
.header {
    background-color: var(--bg-light);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px;
}

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

.logo {
    display: flex;
    align-items: center;
    font-size: 20px;
    font-weight: bold;
}

.logo-svg {
    margin-right: 10px;
}

.main-nav ul {
    display: flex;
}

.main-nav li {
    margin-left: 20px;
}

.main-nav a {
    color: var(--text-color);
    font-weight: 500;
    transition: var(--transition);
}

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

.lang-switch a {
    display: flex;
    align-items: center;
}

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

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--secondary-color);
    margin: 2px 0;
    transition: var(--transition);
}

/* Hero Section */
.hero-section {
    padding: 80px 0;
    background-color: var(--bg-light);
    background-image: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    overflow: hidden;
}

.hero-section .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.hero-content {
    width: 50%;
}

.hero-content h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    color: var(--secondary-color);
    line-height: 1.2;
}

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    color: var(--text-color);
}

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

.cta-button {
    padding: 12px 24px;
    border-radius: var(--border-radius);
    font-weight: 600;
    transition: var(--transition);
}

.cta-button.primary {
    background-color: var(--primary-color);
    color: var(--secondary-color);
}

.cta-button.secondary {
    background-color: var(--secondary-color);
    color: var(--light-text);
}

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

.hero-image {
    width: 45%;
    display: flex;
    justify-content: center;
}

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

.features-section h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 50px;
    color: var(--secondary-color);
}

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

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

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

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

.feature-card h3 {
    margin-bottom: 15px;
    font-size: 1.5rem;
    color: var(--secondary-color);
}

/* Download Section */
.download-section {
    padding: 80px 0;
    background-color: var(--bg-light);
}

.download-section h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 15px;
    color: var(--secondary-color);
}

.section-desc {
    text-align: center;
    font-size: 1.2rem;
    margin-bottom: 50px;
    color: var(--grey-dark);
}

.download-options {
    display: flex;
    justify-content: center;
    gap: 40px;
    flex-wrap: wrap;
}

.download-option {
    background-color: var(--grey-light);
    border-radius: var(--border-radius);
    padding: 30px;
    width: 100%;
    max-width: 350px;
    text-align: center;
    box-shadow: var(--shadow);
}

.download-option h3 {
    margin-bottom: 15px;
    font-size: 1.5rem;
    color: var(--secondary-color);
}

.download-option p {
    margin-bottom: 25px;
    color: var(--grey-dark);
}

.download-buttons {
    display: flex;
    justify-content: center;
    gap: 10px;
}

.download-button {
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--primary-color);
    color: var(--secondary-color);
    padding: 12px 24px;
    border-radius: var(--border-radius);
    font-weight: 600;
    transition: var(--transition);
}

.download-button:hover {
    background-color: #e0ac1e;
    transform: translateY(-3px);
    box-shadow: var(--shadow);
}

.download-icon {
    margin-right: 8px;
}

/* About Section */
.about-section {
    padding: 80px 0;
    background-color: var(--secondary-color);
    color: var(--light-text);
}

.about-section h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 50px;
    color: var(--primary-color);
}

.about-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
}

.about-text {
    width: 60%;
}

.about-text p {
    margin-bottom: 15px;
    font-size: 1.1rem;
}

.about-stats {
    width: 35%;
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.stat-item {
    background-color: rgba(243, 186, 47, 0.1);
    border-radius: var(--border-radius);
    padding: 20px;
    text-align: center;
}

.stat-value {
    font-size: 2.5rem;
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: 5px;
}

.stat-label {
    font-size: 1rem;
}

/* Footer */
.footer {
    background-color: var(--bg-dark);
    color: var(--light-text);
    padding: 60px 0 20px;
}

.footer-top {
    display: flex;
    justify-content: space-between;
    margin-bottom: 40px;
    flex-wrap: wrap;
    gap: 30px;
}

.footer-logo {
    display: flex;
    align-items: center;
    font-size: 1.5rem;
    font-weight: bold;
    margin-bottom: 20px;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 40px;
}

.footer-column h4 {
    font-size: 1.2rem;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.footer-column ul li {
    margin-bottom: 10px;
}

.footer-column ul li a {
    color: var(--light-text);
    transition: var(--transition);
}

.footer-column ul li a:hover {
    color: var(--primary-color);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 20px;
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 20px;
}

.copyright {
    color: var(--grey-dark);
}

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

.footer-bottom-links a {
    color: var(--grey-dark);
    transition: var(--transition);
}

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

/* Responsive Styles */
@media (max-width: 992px) {
    .hero-content {
        width: 60%;
    }
    
    .hero-image {
        width: 40%;
    }
    
    .about-content {
        flex-direction: column;
    }
    
    .about-text, .about-stats {
        width: 100%;
    }
    
    .about-stats {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 15px;
    }
}

@media (max-width: 768px) {
    .hero-section .container {
        flex-direction: column;
        text-align: center;
    }
    
    .hero-content, .hero-image {
        width: 100%;
    }
    
    .hero-content {
        margin-bottom: 40px;
    }
    
    .cta-buttons {
        justify-content: center;
    }
    
    .main-nav {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .about-stats {
        grid-template-columns: 1fr;
    }
    
    .footer-top {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .hero-content h1 {
        font-size: 2.2rem;
    }
    
    .features-section h2,
    .download-section h2,
    .about-section h2 {
        font-size: 2rem;
    }
    
    .cta-buttons,
    .footer-bottom {
        flex-direction: column;
        gap: 15px;
    }
    
    .download-options {
        flex-direction: column;
        align-items: center;
    }
    
    .footer-bottom-links {
        justify-content: center;
    }
}