@media (min-width: 800px) {
    body {
        background-color: #ffffff;
        font-family: Arial, sans-serif;
        line-height: 1.6;
        margin: 0;
        padding: 0;
        color: #333;
        background-image: url('picture/Application/backgroung.png');
        background-repeat: no-repeat;
        background-size: 100vw 100vh;
        background-attachment: scroll;
        background-position: center top;
        background-attachment: fixed;
    }
    /* //////頂部區域////// */
    header {
        position: fixed;
        background: linear-gradient(to right, #9e9d77f0, #2b3e57f0);
        width: 100%;
        height: 105px;
        z-index: 1000;
        color: white;
    }
    .header-container {
        position: relative;
        height: 100%;
        display: flex;
        align-items: center;
        justify-content: space-between; 
    }
    .header-logo {
        display: flex;
        align-items: center;
        justify-content: space-evenly; 
        min-width: 20%;
        height: auto;
        margin: 0 0;
        padding: 0 0;
    }
    .header-img {
        width: 130px;
        height: 100%;
        display: block;
        pointer-events: auto;
        user-select: none;
    }
    .header-links a {
        display: flex;
        align-items: center;
        justify-content: space-evenly; 
        color: white;
        text-decoration: none;
        padding: 1vh 2vw;
        font-size: 16px;
        height: 90px;
    }
    .header-links a:hover {
        display: flex;
        align-items: center;
        justify-content: center; 
        height: 120%;
        background-color: #ffffff40;
        transition: background-color 0.5s;
        color: #ffffff;
        box-shadow: 0 0 20px rgb(39, 18, 0);
    }
    .header-menu {
        list-style: none;
        display: flex;
        align-items: center;
        justify-content: center; 
        width: auto;
        height: 75px;
        margin: 0 0;
        padding: 0 0;
    }
    .header-menu-item-dropdown {
        display: flex;
        align-items: center;
        justify-content: center; 
        width: auto;
        height: 75px;
        position: relative;
    }
    .header-menu-item-dropdown a {
        color: #ffffff;
    }
    .header-dropdown-menu {
        opacity: 0;
        transform: translateY(-1vh);
        visibility: hidden;
        transition: opacity 0.3s ease, transform 0.3s ease;
        display: flex;
        flex-direction: column;
        justify-content: space-evenly;
        position: absolute;
        top: 120%;
        left: 0;
        width: 200px;
        height: 300px;
        background: #445357;
        border: 1px solid #ccc;
        padding: 0 0;
        margin: 0 0;
        border-radius: 10px;
        list-style: none;
        z-index: 1000;
    }
    .header-menu-item-dropdown:hover .header-dropdown-menu {
        opacity: 1;
        transform: translateY(0);
        visibility: visible;
    }
    .header-item-image {
        position: relative;
        display: flex;
        align-items: center;
        justify-content: center;
        text-decoration: none;
        color: #ffffff;
        width: 200px;
        height: auto;
        margin: 0px 0px;
        padding: 10px 0px;
        border-radius: 10px;
        font-size: 25px;
    }
    .header-item-image a {
        display: flex;
        align-items: center;
        justify-content: left;
        text-decoration: none;
        color: #ffffff;
        width: 200px;
        height: auto;
        margin: 0px 0px;
        padding: 10px 10px;
        border-radius: 10px;
        font-size: 25px;
    }
    .header-item-image a:hover {
        display: flex;
        align-items: center;
        justify-content: left;
    }
    .header-item-image:hover .header-hover-image {
        display: block;
    }
    .header-hover-image {
        display: none;
        position: absolute;
        left: 100%;
        top: 0;
        width: 150%;
        height: auto;
        background: linear-gradient(to bottom, #837762, #13252b);
        border: 1px solid #ccc;
        padding: 0;
        margin: 0;
        object-fit: cover;
    }
    .header-hover-image h1 {
        text-align: center;
        padding: 0;
        margin: 0;
        font-size: 1.5vw;
        font-weight: 1000;
    }
    .header-hover-image h2 {
        text-align: center;
        padding: 2vh;
        margin: 0;
        font-size: 1vw;
        font-weight: 700;
        color: #bebebe;
    }
    .lang-toggle {
        position: relative;
        width: 100px;
        height: 35%;
        background-color: #837762;
        border-radius: 100px;
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 0;
        margin: 0 3vw;
        font-family: sans-serif;
        cursor: pointer;
        user-select: none;
        transition: background-color 0.3s;
    }
    .lang-toggle .toggle-btn {
        position: absolute;
        width: 55%;
        height: 100%;
        background-color: rgba(255, 255, 255, 0.4);
        border-radius: 100px;
        transition: transform 0.3s;
        box-shadow: 0 0 5px rgba(0, 0, 0, 0.603);
        transform: translateX(0%);
    }
    .lang-toggle span {
        font-size: 15px;
        font-weight: 300;
        z-index: 1;
        width: 50%;
        text-align: center;
        font-weight: bold;
    }
    .lang-toggle.active .toggle-btn {
        transform: translateX(80%);
    }
    .menu-toggle {
      display: none;
    }
    .product-toggle {
      display: none;
    }
    .header-menu-space {
      display: none;
    }
    .header-menu-line {
      display: none;
    }

    /* //////位置按鈕////// */
    .buttom-area {
        display: flex;
        flex-direction: column;
        align-items: end;
        justify-content: center;
        position: fixed;
        right: 0;
        bottom: 1vw;
        width: 10%;
        height: 10vw;
        z-index: 1000;
    }
    .buttom-area-small {
        background-color: #fff27ec7;
        display: flex;
        align-items: center;
        justify-content: center;
        width: 100%;
        height: 3vw;
        margin: 0.2vw 0;
        font-size: 1vw;
        font-weight: 700;
        cursor: pointer;
        color: #1b1b1b;
        padding: 0 0;
        clip-path: polygon(10% 0, 100% 0, 100% 100%, 10% 100%, 0 50%);
        transition: all 0.3s ease;
    }
    .buttom-area-small:hover{
        width: 110%;
        background-color: #fff27e;
    }

    /* //////中部區域1_開場圖片////// */
    .opening {
        position: relative;
        width: 100%;
        height: 50vw;
        overflow: hidden;
    }
    .opening-img {
        position: absolute;
        top: 5%;
        left: 0%;
        width: 100%;
        height: 50vw;
    }
    .opening-img img {
        width: 100%;
        height: auto;
    }
    .opening-text {
        background-color: #e6e6e6c7;
        display: flex;
        flex-direction: column;
        align-items: center;
        position: absolute;
        top: 45%;
        left: 0%;
        width: 100%;
        height: 10vw;
    }
    .opening-text h1 {
        color: #000000;
        position: relative;
        top: -1vw;
        font-size: 3vw;
        font-weight: 700;
    }
    .opening-text h2 {
        color: #000000;
        position: relative;
        top: -4vw;
        font-size: 1.5vw;
        font-weight: 500;
    }
    .area {
        background-color: rgb(255, 251, 239);
        display: flex;
        justify-content: center;
        position: relative;
        margin-top: -34vw;
        left: 0;
        width: 100%;
        height: 35vw;
        clip-path: polygon(0 80%, 50% 100%, 100% 80%, 100% 100%, 50% 100%, 0 100%);
    }

    /* //////中部區域2_智慧基礎建設、中部區域3_智慧移動、中部區域4_智慧3D感知////// */
    .AI-build {
        display: flex;
        justify-content: center;
        background-color: rgb(230, 230, 230);
        position: relative;
        width: 100%;
        height: 35vw;
        border-radius: 5vw;
    }
    .AI-build h1 {
        background-color: rgb(255, 217, 102);
        display: flex;
        justify-content: center;
        align-items: center;
        position: absolute;
        top: -4vw;
        width: 20%;
        font-size: 2.5vw;
        font-weight: 500;
        color: #000000;
    }
    .AI-build h2 {
        position: absolute;
        top: 3vw;
        width: 50%;
        font-size: 1.5vw;
        font-weight: 400;
        color: #000000;
    }
    .AI-build-buttomarea {
        display: flex;
        justify-content: space-around;
        position: absolute;
        bottom: 5vw;
        width: 100%;
        height: 15vw;
    }
    .AI-build-buttom {
        background-color: rgb(151, 151, 151);
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        width: 15%;
        height: 12vw;
        cursor: pointer;
        transition: all 0.3s ease;
    }
    .AI-build-buttom:hover {
        width: 17%;
        height: 14vw;
    }
    .AI-build-buttom img {
        width: 80%;
        height: 10vw;
    }
    .AI-build-buttom h1 {
        background-color: rgb(255, 217, 102);
        position: absolute;
        top: 11vw;
        width: 15%;
        height: 3vw;
        border-radius: 0.2vw;
        font-size: 1.5vw;
        font-weight: 500;
        transition: all 0.3s ease;
    }
    .AI-build-buttom:hover h1{
        width: 17%;
        top: 12vw;   
    }
    .build-left {
        position: relative;
        width: 100%;
        height: 50vw;
    }
    .build-left-title {
        background-color: rgb(34, 34, 34);
        position: absolute;
        top: 22vw;
        width: 50%;
        height: 0.2vw;
    }
    .build-left-title h1 {
        position: absolute;
        top: -13vw;
        left: 5vw;
        font-size: 3vw;
        font-weight: 700;
    }
    .build-left-title h2 {
        position: absolute;
        top: -4vw;
        left: 1vw;
        width: 80%;
        font-size: 1.5vw;
        font-weight: 500;
    }
    .build-left-content {
        position: absolute;
        top: 22vw;
        width: 100%;
        height: 35vw;
    }
    .build-left-content h1 {
        position: absolute;
        top: 5vw;
        left: 5vw;
        width: 40%;
        font-size: 2vw;
        font-weight: 700;
    }
    .build-left-content h2 {
        position: absolute;
        top: 15vw;
        left: 5vw;
        width: 40%;
        font-size: 1.5vw;
        font-weight: 500;
    }
    .build-left-content img {
        position: absolute;
        top: -8vw;
        right: 0vw;
        width: 50%;
        height: auto;
    }
    .build-right {
        position: relative;
        width: 100%;
        height: 50vw;
    }
    .build-right-title {
        background-color: rgb(34, 34, 34);
        position: absolute;
        top: 22vw;
        right: 0;
        width: 50%;
        height: 0.2vw;
    }
    .build-right-title h1 {
        position: absolute;
        top: -13vw;
        right: 5vw;
        font-size: 3vw;
        font-weight: 700;
    }
    .build-right-title h2 {
        display: flex;
        justify-content: end;
        position: absolute;
        top: -4vw;
        right: 1vw;
        width: 75%;
        font-size: 1.5vw;
        font-weight: 500;
    }
    .build-right-content {
        position: absolute;
        top: 22vw;
        width: 100%;
        height: 35vw;
    }
    .build-right-content h1 {
        position: absolute;
        top: 5vw;
        right: 5vw;
        width: 40%;
        font-size: 2vw;
        font-weight: 700;
    }
    .build-right-content h2 {
        position: absolute;
        top: 15vw;
        right: 5vw;
        width: 40%;
        font-size: 1.5vw;
        font-weight: 500;
    }
    .build-right-content img {
        position: absolute;
        top: -8vw;
        left: 0vw;
        width: 50%;
        height: auto;
    }
    .space {
        width: 100%;
        height: 20vw;
    }

    /* //////底部區域////// */
    footer {
        position: relative;
         background: linear-gradient(to right, #2b3e57f0, #9e9d77f0);
        padding: 20vh 5vw;
        margin-top: 30vh;
    }
    .footer-menu {
        position: absolute;
        top: 15%;
        left: 0%;
        width: 100%;
        height: auto;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    .footer-links a {
        color: #ffffff;
        text-decoration: none;
        font-size: 3.2vh;
        font-weight: 700;
        padding: 0 1vw;
        position: relative;
    }
    .footer-vertical-line {
        background-color: #bcbcbc;
        display: flex;
        align-items: center;
        justify-content: center;
        position: absolute;
        top: 0%;
        left: 96%;
        width: 2%;
        height: 100%;
        z-index: 20;
    }
    .footer-horizontal-line {
        background-color: #bcbcbc;
        display: flex;
        align-items: center;
        justify-content: center;
        position: absolute;
        top: 30%;
        width: 80%;
        height: 1%;
        left: 10%
    }
    .footer-container {
        margin-top: 5%;
        margin-left: 10%;
        font-weight: 200;
        color: #ffffff;
    }
    .footer-copyright {
        position: absolute;
        top: 85%;
        left: 67%;
        font-size: 0.4vw;
        color: #959595;
    }
    .footer-logo {
        position: absolute;
        top: 40%;
        left: 80%; 
    }
    .footer-img {
        width: 70%;
        height: auto;
    }

}