* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    list-style: none;
    font-family: 'Noto Sans TC', sans-serif;
}

html,
body {
    width: 100%;
    height: 100%;
}

body::after {
    content: "";
    position: fixed;
    top: 0;
    left: 0;
    background: url(../IMG/BG7.jpg) no-repeat center center / cover;
    width: 100%;
    height: 100vh;
    opacity: .8;
    z-index: -1;
}


a {
    text-decoration: none;
    color: #fff;
}

h2 {
    text-align: center;
    margin: 0.5rem 0;
}

p {
    line-height: 1.8;
    margin-bottom: 0.8rem;
    font-weight: 400;
}

img {
    vertical-align: bottom;
}

.container-fluid {
    max-width: 1920px;
    width: 100%;
    margin: auto;
}

.container {
    width: 1366px;
    max-width: 1920px;
    margin: auto;
}

.row::after {
    content: '';
    display: table;
    clear: both;
}

/**********
Nav
**********/

nav {
    background: rgba(0, 0, 0, 0.616);
    line-height: 50px;
    padding: 0 25px;
    position: sticky;
    top: 0;
    z-index: 10;
}

.logo {
    float: left;
    padding-top: 5px;
}

.logo img {
    height: 50px;
    line-height: 50px;
}

.gn img {
    width: 50px;
    height: 50px;
    line-height: 50px;
}

.navList {
    float: right;
    font-size: 0;
}

.navList li {
    display: inline-block;
    font-size: 22px;
    margin: 5px 16px 0 0;
    font-weight: 500;
}

.navList li:hover a {
    color: #0af;
    transition: color .5s;
}

.icon {
    display: none;
}

.fa-bars:hover {
    color: #0af;
    transition: color .5s;
}

.mobile {
    position: relative;
}

.mobile .navList {
    position: absolute;
    display: block;
    background: rgba(34, 34, 34, .8);
    width: 100%;
    top: 55px;
    box-shadow: 10px 10px 13px 0px rgba(95, 91, 92, 0.8);
}

.mobile .navList li {
    display: block;
    text-align: center;
    height: 80px;
}


.fa-bars {
    color: #fff;
    position: relative;
    top: -50px;
}

/**********
Header
**********/
header {
    position: relative;
    width: 100%;
    height: 100vh;
}

.ud {
    position: absolute;
    width: 100px;
    left: 5%;
    bottom: 50%;
    border-radius: 50%;
    border: 5px solid #000;
}

.fs {
    position: absolute;
    width: 100px;
    right: 5%;
    bottom: 50%;
    border-radius: 50%;
    border: 5px solid #000;
}

.ud:hover,
.fs:hover {
    border: 10px solid #f00;
    transition: .5s;
}

.btn button {
    width: 200px;
    height: 40px;
    background-color: rgba(133, 176, 255, 0.7);
    border: none;
    position: absolute;
    bottom: 20%;
    left: 30%;
    border-radius: 200px;
    border: 1px solid #000;
    box-shadow: 8px 8px 13px 0px rgba(0, 0, 0, 0.8);
    font-size: 17px;
}

.btn button:hover {
    background-color: rgb(0, 89, 255);
    transition: .5s;
}

.btn button:hover a {
    color: #fff;
    transition: .5s;
}

.btn button:last-of-type {
    left: 60%;
}

.btn button a {
    color: #000;
    display: block;
    font-weight: bold;
}

footer {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 40px;
    background: rgba(0, 0, 0, 0.616);
    color: white;
    text-align: center;
    line-height: 40px;
    z-index: 1000;
    font-size: 18px;
}

/**********
RWD
**********/

@media screen and (max-width: 1000px) {

    body::after {
        content: "";
        position: fixed;
        top: 0;
        left: 0;
        background: url(../IMG/BG7-2.jpg) no-repeat center center / cover;
        width: 100%;
        height: 100vh;
        opacity: .8;
        z-index: -1;
    }

    .container {
        width: 100%;
    }

    .navList {
        display: none;
    }

    .navList a {
        display: block;
    }

    .icon {
        display: block;
        float: right;
        margin-top: 5px;
        cursor: pointer;
    }

    .ud,
    .fs {
        width: 70px;
    }

    .ud:hover,
    .fs:hover {
        border: 5px solid #f00;
    }

    .navList li:hover a {
        background: rgba(255, 255, 255, .3);
    }

    .navList li:hover {
        margin-right: 0;
    }

    .btn button {
        left: 20%;
    }

    .btn button:last-of-type {
        bottom: 12%;
        left: 20%;
    }
}

@media screen and (min-width: 769px) and (max-width: 1386px) {

    .container {
        width: 750px;
    }

    .btn button:last-of-type {
        bottom: 12%;
        left: 30%;
    }
}