/* 全屏遮罩层菜单样式 */
.overlay-menu {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.9);
    z-index: 2000;
    display: none;
    overflow-y: auto;
    padding: 80px 20px 40px;
}

.overlay-menu-close {
    position: absolute;
    top: 20px;
    right: 20px;
    color: #fff;
    font-size: 30px;
    cursor: pointer;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
}

.overlay-menu-close:hover {
    background-color: rgba(255, 255, 255, 0.2);
    transform: rotate(90deg);
}

/* PC端菜单样式 */
.overlay-menu-content {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    max-width:100%;
    margin: 0 auto;
}

.overlay-menu-category {width: 10%;
    margin: 10px;
}

.overlay-menu-category-title {
    color: #fff;
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 2px solid rgba(255, 255, 255, 0.2);
    position: relative;    text-align: center;
}

.overlay-menu-category-title::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    transform: translateX(-50%);
    width: 50px;
    height: 2px;
    background-color: #fff;
}

.overlay-menu-items {
    list-style: none;
    padding: 0;
    margin: 0;
}

.overlay-menu-items li {
    margin: 10px 0;    text-align: center;
}

.overlay-menu-items a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-size: 16px;
    transition: all 0.3s ease;
    display: block;
    padding: 5px 0;
}

.overlay-menu-items a:hover {
    color: #fff;
    transform: translateX(5px);
}

/* 移动端菜单样式 */
/* 移动端菜单Logo */
.overlay-menu-logo {
    display: none;
}

@media (max-width: 768px) {
    .overlay-menu {
        padding: 60px 15px 30px;
    }
    
    /* 显示Logo */
    .overlay-menu-logo {
        display: block;
        text-align: center;    margin-bottom: 20px;
    margin-top: 20px;
    }
    
    .overlay-menu-logo img {
        height: 50px;
        width: auto;
    }
    
    .overlay-menu-content {
        flex-direction: column;
    }
    
    .overlay-menu-category {
        width: 100%;
        margin: 0;
        text-align: left;
        border-bottom:1px solid #5b5c66;
    }
    
    .overlay-menu-category-title {
        font-size: 18px;
        margin-bottom: 0;
        padding: 15px 0;
        border-bottom: none;
        display: flex;
        justify-content: space-between;
        align-items: center;color: #d7d7d7;    font-weight: normal;
    }
    
    .overlay-menu-category-title::after {
        display: none;
    }
    
    .overlay-menu-toggle {
        width: 24px;
        height: 24px;
        position: relative;
        cursor: pointer;
    }
    
    .overlay-menu-toggle::before,
    .overlay-menu-toggle::after {
        content: '';
        position: absolute;
        background-color: #fff;
        transition: all 0.3s ease;
    }
    
    .overlay-menu-toggle::before {
        width: 24px;
        height: 2px;
        top: 50%;
        left: 0;
        transform: translateY(-50%);
    }
    
    .overlay-menu-toggle::after {
        width: 2px;
        height: 24px;
        top: 0;
        left: 50%;
        transform: translateX(-50%);
    }
    
    .overlay-menu-toggle.active::after {
        transform: translateX(-50%) rotate(90deg);
        opacity: 0;
    }
    
    .overlay-menu-items {
        display: none;
        padding-left: 15px;
    }
    
    .overlay-menu-items.active {
        display: block;
    }
    
    .overlay-menu-items li {
        border-top: 1px solid #ccc;
        margin: 0;
        text-align: left;
    }
    
    .overlay-menu-items a {
        padding: 12px 0;
    }
}

.mobile-menu-toggle span {
    display: block;
    width: 100%;
    height: 3px;
    background-color: #fff;
    border-radius: 3px;
    transition: all 0.3s ease;
}

/* PC端导航栏中的菜单按钮样式 */
.main-nav .mobile-menu-toggle {
    margin-left: 20px;
}

@media (max-width: 768px) {
    .main-nav .mobile-menu-toggle {
        display: none;
    }
}