/* 重置默认样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    line-height: 1.6;
    color: #333;
}

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

/* 滚动显示动画 */
.scroll-animate {
    opacity: 0;
    transform: translateY(30px);
}

.scroll-animate.visible {
    animation: fadeInUp 0.8s forwards;
}

/* 通用容器样式 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 主页英雄区域 */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}

.hero-content {
    max-width: 800px;
    padding: 20px;
}

.logo-container {
    margin-bottom: 30px;
}

.logo {
    width: 120px;
    height: 120px;
    object-fit: contain;
    border-radius: 20px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
    background: rgba(255, 255, 255, 0.1);
    padding: 10px;
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.logo:hover {
    transform: scale(1.05);
    box-shadow: 0 6px 25px rgba(0,0,0,0.2);
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 20px;
    color: #2c3e50;
}

.hero p {
    font-size: 1.5rem;
    margin-bottom: 30px;
    color: #34495e;
}

/* 下载按钮样式 */
.download-btn {
    display: inline-block;
    padding: 15px 40px;
    background: #3498db;
    color: white;
    text-decoration: none;
    border-radius: 30px;
    font-size: 1.2rem;
    transition: transform 0.3s ease;
}

.download-btn:hover {
    transform: translateY(-2px);
    background: #2980b9;
}

/* 功能展示区域 */
.features {
    padding: 100px 0;
    background: #fff;
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.features h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 60px;
    color: #2c3e50;
}

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

.feature-item {
    text-align: center;
    padding: 20px;
}

.feature-item img {
    max-width: 100%;
    height: auto;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    margin-bottom: 20px;
}

.feature-item h3 {
    font-size: 1.5rem;
    margin: 15px 0;
    color: #2c3e50;
}

/* 为什么选择我们 */
.why-us {
    min-height: 100vh;
    padding: 100px 0;
    background: linear-gradient(135deg, #e0c3fc 0%, #8ec5fc 100%);
    display: flex;
    align-items: center;
}

.why-us h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 60px;
    color: #2c3e50;
}

.benefits {
    display: flex;
    flex-direction: column;
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
}

@media (min-width: 1024px) {
    .benefits {
        flex-direction: row;
        justify-content: space-between;
    }
    
    .benefit {
        flex: 1;
        margin: 0 15px;
    }
}

.benefit {
    text-align: center;
    padding: 40px 30px;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 20px;
    transition: all 0.3s ease;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    max-width: 100%;
}

/* 页脚 */
footer {
    background: #2c3e50;
    color: #fff;
    padding: 20px 0;
    text-align: center;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.5rem;
    }

    .hero p {
        font-size: 1.2rem;
    }

    .feature-grid {
        grid-template-columns: 1fr;
    }

    .benefits {
        grid-template-columns: 1fr;
    }
}