/* 基础样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
}

/* 容器样式 */
.container {
    max-width: 100%;
    padding: 20px;
    margin: 0 auto;
}

/* 头部样式 */
.welcome-header {
    text-align: center;
    padding: 40px 0;
    background: linear-gradient(135deg, #6366f1, #4f46e5);
    color: white;
    border-radius: 12px;
    margin-bottom: 30px;
}

.welcome-header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
}

.subtitle {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* 主要内容区域 */
.main-content {
    background: white;
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.feature-section h2 {
    text-align: center;
    margin-bottom: 30px;
    color: #1f2937;
}

.features {
    display: grid;
    gap: 20px;
    grid-template-columns: 1fr;
}

.feature-item {
    padding: 20px;
    background: #f8fafc;
    border-radius: 8px;
    transition: transform 0.3s ease;
}

.feature-item:hover {
    transform: translateY(-5px);
}

.feature-item h3 {
    color: #4f46e5;
    margin-bottom: 10px;
}

/* 页脚样式 */
.page-footer {
    text-align: center;
    padding: 20px 0;
    margin-top: 30px;
    color: #6b7280;
}

/* 响应式布局 */
@media (min-width: 768px) {
    .container {
        max-width: 768px;
    }

    .features {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* 动画效果 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.welcome-header, .feature-item {
    animation: fadeIn 0.8s ease-out forwards;
}