/* 全局样式 */
:root {
    --primary-color: #4a6cf7;
    --secondary-color: #5c8ef2;
    --accent-color: #6e4aff;
    --text-color: #333;
    --light-text: #666;
    --background-color: #f8f9ff;
    --card-background: #fff;
    --border-radius: 16px;
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Microsoft YaHei', 'PingFang SC', sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
}

/* 头部区域 */
.header {
    position: relative;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: white;
    padding: 80px 0 120px;
    overflow: hidden;
}

.header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 320"><path fill="rgba(255, 255, 255, 0.05)" d="M0,224L48,213.3C96,203,192,181,288,181.3C384,181,480,203,576,208C672,213,768,203,864,181.3C960,160,1056,128,1152,133.3C1248,139,1344,181,1392,202.7L1440,224L1440,0L1392,0C1344,0,1248,0,1152,0C1056,0,960,0,864,0C768,0,672,0,576,0C480,0,384,0,288,0C192,0,96,0,48,0L0,0Z"></path></svg>');
    background-size: cover;
    background-position: center;
}

.header-content {
    position: relative;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 40px;
}

.header-image-container {
    flex: 0 0 250px;
}

.header-image {
    
    height: 250px;
    margin: 0 auto;
    
}

.header-text {
    flex: 1;
    text-align: left;
    max-width: 600px;
}

.logo {
    font-size: 48px;
    font-weight: bold;
    margin-bottom: 20px;
    letter-spacing: 2px;
}

.slogan {
    font-size: 20px;
    margin-bottom: 30px;
    opacity: 0.9;
}

/* 响应式设计 - 大屏幕 */
@media (max-width: 992px) {
    .header-content {
        flex-direction: column;
        text-align: center;
    }
    
    .header-text {
        text-align: center;
    }
    
    .header-image {
        width: 200px;
        height: 200px;
    }
}

/* 响应式设计 - 中等屏幕 */
@media (max-width: 768px) {
    .header-image {
        width: 150px;
        height: 150px;
    }
    
    .logo {
        font-size: 36px;
    }
    
    .slogan {
        font-size: 18px;
    }
}

/* 响应式设计 - 小屏幕 */
@media (max-width: 576px) {
    .header-content {
        gap: 20px;
    }
    
    .header-image {
        width: 120px;
        height: 120px;
    }
    
    .logo {
        font-size: 28px;
    }
}

/* 下载区域 */
.download-section {
    position: relative;
    max-width: 1200px;
    margin: -60px auto 80px;
    padding: 0 20px;
}

.download-card {
    background-color: var(--card-background);
    border-radius: var(--border-radius);
    padding: 40px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    text-align: center;
    position: relative;
    z-index: 10;
    transition: var(--transition);
}

.download-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.12);
}

.download-title {
    font-size: 28px;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.download-desc {
    color: var(--light-text);
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

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

.download-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 15px 30px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50px;
    font-size: 16px;
    cursor: pointer;
    transition: var(--transition);
    min-width: 200px;
    justify-content: center;
}

.download-btn:hover {
    background-color: var(--secondary-color);
    transform: translateY(-2px);
}

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

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

.btn-icon {
    font-size: 20px;
}

/* 特性区域 */
.features-section {
    padding: 60px 20px;
    background-color: white;
}

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

.section-title {
    text-align: center;
    font-size: 36px;
    margin-bottom: 60px;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    border-radius: 2px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}

.feature-card {
    padding: 30px;
    border-radius: var(--border-radius);
    background-color: var(--background-color);
    text-align: center;
    transition: var(--transition);
    border: 2px solid transparent;
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: 0 10px 20px rgba(74, 108, 247, 0.1);
}

.feature-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    color: white;
    font-size: 32px;
}

.feature-title {
    font-size: 20px;
    margin-bottom: 15px;
}

.feature-desc {
    color: var(--light-text);
}

/* 优势区域 */
.advantages-section {
    padding: 80px 20px;
    background-color: var(--background-color);
    position: relative;
    overflow: hidden;
}

.advantages-container {
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
    z-index: 2;
}

.advantages-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.advantage-list {
    list-style: none;
}

.advantage-item {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    margin-bottom: 30px;
}

.advantage-icon {
    color: var(--primary-color);
    font-size: 24px;
    margin-top: 5px;
}

.advantage-text {
    flex: 1;
}

.advantage-title {
    font-size: 18px;
    margin-bottom: 8px;
}

.advantage-desc {
    color: var(--light-text);
}

.advantages-image {
    position: relative;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.advantages-image::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg, rgba(74, 108, 247, 0.1), rgba(110, 74, 255, 0.1));
    z-index: 1;
}

/* 下载统计 */
.stats-section {
    padding: 60px 20px;
    background-color: white;
}

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

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

.stat-item {
    padding: 30px;
    border-radius: var(--border-radius);
    background-color: var(--background-color);
    transition: var(--transition);
}

.stat-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.05);
}

.stat-number {
    font-size: 48px;
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.stat-label {
    color: var(--light-text);
    font-size: 16px;
}

/* 常见问题 */
.faq-section {
    padding: 80px 20px;
    background-color: var(--background-color);
}

.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    margin-bottom: 20px;
    border-radius: var(--border-radius);
    overflow: hidden;
    background-color: white;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.faq-question {
    padding: 20px;
    font-size: 18px;
    font-weight: bold;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
}

.faq-question:hover {
    background-color: #f8f9ff;
}

.faq-answer {
    padding: 0 20px 20px;
    color: var(--light-text);
    display: none;
}

.faq-item.active .faq-answer {
    display: block;
}

.faq-toggle {
    transition: transform 0.3s ease;
}

.faq-item.active .faq-toggle {
    transform: rotate(180deg);
}

/* 页脚 */
.footer {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: white;
    padding: 60px 20px 30px;
}

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

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

.footer-col h3 {
    font-size: 20px;
    margin-bottom: 20px;
}

.footer-col p {
    opacity: 0.8;
    margin-bottom: 20px;
}

.footer-links {
    list-style: none;
}

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

.footer-links a {
    color: white;
    text-decoration: none;
    opacity: 0.8;
    transition: var(--transition);
}

.footer-links a:hover {
    opacity: 1;
    padding-left: 5px;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    opacity: 0.8;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .advantages-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .advantage-item {
        justify-content: center;
    }
}

@media (max-width: 768px) {
    .logo {
        font-size: 36px;
    }
    
    .slogan {
        font-size: 18px;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .download-card {
        padding: 30px 20px;
    }
    
    .download-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .download-btn {
        width: 100%;
        max-width: 300px;
    }
}

@media (max-width: 576px) {
    .header {
        padding: 60px 0 100px;
    }
    
    .logo {
        font-size: 28px;
    }
    
    .features-grid {
        gap: 20px;
    }
    
    .feature-card {
        padding: 20px;
    }
}