/* 响应式导航栏样式 */
.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    padding: 5px;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background-color: #ddd;
    margin: 3px 0;
    transition: 0.3s;
    border-radius: 2px;
}

/* 媒体查询 - 在宽度小于768px时触发响应式布局 */
@media screen and (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    header nav ul {
        position: absolute;
        top: 4rem;
        right: 0;
        width: 30%;
        background-color: #22262a;
        flex-direction: column;
        align-items: flex-start;
        padding: 1rem;
        box-shadow: -2px 2px 5px rgba(0, 0, 0, 0.5);
        border-radius: 0 0 0 5px;
        display: none;
        z-index: 1000;
    }
    
    header nav ul.show {
        display: flex;
    }
    
    header li {
        display: block;
        margin: 0.5rem 0;
        width: 100%;
    }
    
    header li a {
        display: block;
        padding: 0.5rem 0;
    }
    
    /* 调整header的padding以适应移动端 */
    header {
        padding: 0 1rem;
    }
    
    /* 确保导航菜单有最小宽度 */
    header nav {
        min-width: auto;
    }
}

/* 汉堡菜单动画 */
.hamburger.active span:nth-child(1) {
    transform: rotate(-45deg) translate(-5px, 6px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(45deg) translate(-5px, -6px);
}