.section5 {
    margin: 0;
    padding: 0.5vw;
    padding-left: 7vw;
    border: none;
    border-bottom: 2px solid black;
    width: 100vw;
    min-height: 4vh;
}

.section5_nav {
    width: 100vw;
    /* background: rgba(255, 255, 255, 0.978); */
    display: flex;
}

.section5_logo {
    margin-top: auto;
    margin-bottom: auto;
    width: 15vh;
    height: 10vh;
    background-image: url('../pic/icon/jh-color.jpg');
    background-repeat: no-repeat;
    background-position: center;
    background-size: 100%;
}

.section5_logo img {
    width: 100%;
    height: 100%;
}


.section5_items {
    width: 8.4vw;
    font-size: 2vh;
    margin-top: auto;
    margin-bottom: auto;
    line-height: 4vh;
    flex-direction: row;
    justify-content: center;
    align-items: center;
    text-align: center;
}

.section5_items a {
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    text-decoration: none;
    background: none;
    /* remove the background */
    color: rgba(0, 0, 0, 1);
    font-size: 2vh;
    z-index: 11;

}

.section5_items :hover {
    color: #000;
    text-shadow: 10px 10px 10px rgba(0, 0, 0, 0.5);
    transition: 0.3s;
    font-size: 2.4vh;
}

.section5_block1 {
    margin-top: auto;
    margin-bottom: auto;
    width: 5.9vw;
    margin-right: 10vw;
    margin-left: auto;
    font-size: 2vh;
    text-align: center;
    justify-content: center;
    line-height: 4vh;
    border-radius: 3vw;
    border: 1px solid black;
    background-color: rgba(13, 13, 13, 0.979);
}

.section5_block1 a {
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    text-decoration: none;
    border: none;
    /* remove the border */
    outline: none;
    /* remove the outline */
    background: none;
    /* remove the background */
    color: rgb(220, 220, 220);
}

.section5_items:hover {
    cursor: pointer;
    background-color: rgb(0, 0, 0);
    border: 1px solid rgb(17, 17, 17);
    border-radius: 3vw;
}

.section5_items:hover a {
    color: rgb(238, 238, 238);
}

.section5_block1:hover {
    cursor: pointer;
    background-color: rgb(249, 251, 252);
    border: 1px solid rgb(249, 251, 252);
}

.section5_block1:hover a {
    color: rgb(0, 0, 0);
}


.section5_nav .section5_items {
    position: relative;
    /* Needed to position the dropdown relative to the menu item */
}



.section5_dropdown {
    display: block;
    /* Needed to allow transformations */
    position: absolute;
    /* Position it right below the menu item */
    background-color: rgb(0, 0, 0);
    /* Background color for the dropdown */
    box-shadow: 0px 8px 16px 0px rgba(0, 0, 0, 0.2);
    /* Optional: Adds a shadow to the dropdown */
    width: 100%;
    /* Set the width of the dropdown menu */
    overflow: hidden;
    /* Hide overflow content */
    max-height: 0;
    /* Initial state with no content shown */
    transition: max-height 0.01s ease-in-out;
    /* Smooth transition for max-height */
    z-index: 1;
    /* Ensures the dropdown is on top of other content */
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    /* border-radius: 3vw; */
    border-radius: 1vh;
}


.section5_dropdown a {
    width: 100%;
    color: rgb(255, 255, 255);
    /* Color of dropdown links */
    padding: 1vh 1vh;
    /* Padding for dropdown items */
    text-decoration: none;
    /* No underline on links */
    display: block;
    /* Makes each link take full width of the dropdown */
    /* white-space: nowrap; Prevent text wrapping */
    border-radius: 1vh;
    z-index: 1111;
}

.section5_dropdown a:hover {
    background-color: #f1f1f1;
    /* Background color for hovering on dropdown items */
    color: rgb(0, 0, 0);
}


.section5_nav .section5_items:hover .section5_dropdown {
    max-height: 100vh;
    /* Adjust max-height according to the content size or use 'max-height: none' for automatic height adjustment */
}

@media screen and (max-width: 1100px) {
    .section5_nav .section5_items>a {
        /*vertical text*/
        font-size: 2vh;
        writing-mode: vertical-rl;

    }

    .section5_nav .section5_items:hover .section5_dropdown {
        display: block;
        width: max-content;
        /*transform move to left*/
        transform: translateX(-30%);
    }

    .section5_nav .section5_items:hover .section5_dropdown>a {
        font-size: 2vh;
        width: 30vw;
    }
}