/* 全局样式 */
:root {
    --primary-color: #4CAF50;
    --secondary-color: #2196F3;
    --accent-color: #FFC107;
    --text-color: #333;
    --light-text: #777;
    --background-color: #f8f9fa;
    --container-width: 1200px;
    --border-radius: 8px;
    --box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

h1, h2, h3, h4, h5, h6 {
    margin-bottom: 20px;
    line-height: 1.3;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--secondary-color);
}

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

.btn {
    display: inline-block;
    padding: 12px 24px;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: var(--transition);
}

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

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

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

.btn.primary:hover {
    background-color: var(--secondary-color);
}

.btn.secondary:hover {
    border-color: var(--secondary-color);
    color: var(--secondary-color);
}

/* 头部样式 */
header {
    background-color: white;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    padding: 20px 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

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

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

.logo img {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    margin-right: 15px;
}

.logo h1 {
    font-size: 22px;
    margin-bottom: 0;
}

nav ul {
    display: flex;
    list-style: none;
}

nav ul li {
    margin-left: 30px;
}

nav ul li a {
    color: var(--text-color);
    font-weight: 500;
    padding-bottom: 5px;
    position: relative;
}

nav ul li a:hover,
nav ul li a.active {
    color: var(--primary-color);
}

nav ul li a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: 0;
    left: 0;
    background-color: var(--primary-color);
    transition: var(--transition);
}

nav ul li a:hover::after,
nav ul li a.active::after {
    width: 100%;
}

/* 英雄区域样式 */
.hero {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 100px 0;
    text-align: center;
}

.hero h1 {
    font-size: 42px;
    margin-bottom: 20px;
}

.hero p {
    font-size: 20px;
    max-width: 800px;
    margin: 0 auto 40px;
}

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

/* 关于区域样式 */
.about {
    padding: 80px 0;
    text-align: center;
}

.about h2 {
    color: var(--primary-color);
    font-size: 32px;
}

.about p {
    max-width: 800px;
    margin: 0 auto;
    font-size: 18px;
}

/* 特性区域样式 */
.features {
    padding: 80px 0;
    background-color: white;
}

.features h2 {
    text-align: center;
    color: var(--primary-color);
    font-size: 32px;
    margin-bottom: 50px;
}

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

.feature-item {
    padding: 30px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    text-align: center;
}

.feature-item:hover {
    transform: translateY(-10px);
}

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

.feature-icon img {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    object-fit: cover;
}

.feature-item h3 {
    font-size: 22px;
    color: var(--primary-color);
}

.feature-tagline {
    text-align: center;
    margin-top: 50px;
}

.feature-tagline h3 {
    font-size: 24px;
    color: var(--primary-color);
}

/* 截图区域样式 */
.screenshots {
    padding: 80px 0;
    background-color: var(--background-color);
}

.screenshots h2 {
    text-align: center;
    color: var(--primary-color);
    font-size: 32px;
    margin-bottom: 50px;
}

.screenshot-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.screenshot {
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
}

.screenshot:hover {
    transform: scale(1.05);
}

.screenshot img {
    display: block;
    width: 100%;
    height: auto;
}

/* 页面内容样式 */
.page-content {
    padding: 80px 0;
}

.page-content h1 {
    text-align: center;
    color: var(--primary-color);
    font-size: 36px;
    margin-bottom: 50px;
}

.policy-content, .support-content {
    max-width: 900px;
    margin: 0 auto;
    background-color: white;
    padding: 40px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

.policy-content h2, .support-content h2 {
    color: var(--primary-color);
    font-size: 24px;
    margin-top: 40px;
}

.policy-content h3, .support-content h3 {
    color: var(--secondary-color);
    font-size: 20px;
    margin-top: 30px;
}

.policy-content p, .support-content p {
    margin-bottom: 20px;
}

.policy-content ul {
    margin-left: 20px;
    margin-bottom: 20px;
}

.policy-content li {
    margin-bottom: 10px;
}

/* FAQ样式 */
.faq {
    margin-top: 40px;
}

.faq-item {
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid #eee;
}

.faq-item:last-child {
    border-bottom: none;
}

.contact-info, .support-message {
    margin-top: 40px;
    padding: 20px;
    background-color: rgba(76, 175, 80, 0.1);
    border-radius: var(--border-radius);
}

/* 页脚样式 */
footer {
    background-color: #333;
    color: white;
    padding: 60px 0 20px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-col h3 {
    color: var(--accent-color);
    font-size: 20px;
    margin-bottom: 20px;
}

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

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

.footer-col ul li a {
    color: #ddd;
}

.footer-col ul li a:hover {
    color: white;
}

.copyright {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #444;
    font-size: 14px;
    color: #aaa;
}

/* 响应式样式 */
@media (max-width: 768px) {
    header .container {
        flex-direction: column;
    }
    
    .logo {
        margin-bottom: 20px;
    }
    
    nav ul {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    nav ul li {
        margin: 5px 15px;
    }
    
    .hero {
        padding: 60px 0;
    }
    
    .hero h1 {
        font-size: 32px;
    }
    
    .hero p {
        font-size: 18px;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .cta-buttons .btn {
        margin-bottom: 15px;
    }
    
    .about, .features, .screenshots {
        padding: 60px 0;
    }
    
    .feature-grid {
        grid-template-columns: 1fr;
    }
    
    .policy-content, .support-content {
        padding: 20px;
    }
}