/* 基礎樣式 */
body {
    font-family: system-ui, -apple-system, sans-serif;
    margin: 0;
    padding: 0;
    line-height: 1.6;
    color: #333;
}

/* 導航欄 */
.nav {
    background: white;
    padding: 1rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.nav-content {
    max-width: 1000px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav a {
    color: #333;
    text-decoration: none;
    padding: 0.5rem 1rem;
}

/* 主要內容 */
.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

/* App卡片 */
.app-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.app-card {
    background: white;
    border-radius: 0.5rem;
    padding: 1.5rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.app-card img {
    width: 80px;
    height: 80px;
    border-radius: 20%;
}

/* 頁尾 */
.footer {
    background: #f5f5f5;
    padding: 2rem 1rem;
    margin-top: 2rem;
    text-align: center;
}

/* 響應式設計 */
@media (max-width: 768px) {
    .nav-content {
        flex-direction: column;
        gap: 1rem;
    }
}