* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body, html {
    width: 100%;
    height: 100%;
    overflow-x: hidden;
}

.home {
    width: 100%;
    min-height: 100vh;
    position: relative;
}

.content {
    width: 100%;
    position: relative;
}

.bgc {
    width: 100%;
    height: 100vh;
    object-fit: cover;
    position: fixed;
    top: 0;
    left: 0;
    z-index: -1;
}

.title, .titles {
    position: absolute;
    left: 0;
    right: 0;
    text-align: center;
    color: #fff;
}

.title {
    top: 45vh;
    font-size: 48px;
}

.titles {
    top: 65vh;
    font-size: 20px;
}

.icon {
    width: 15px;
    height: 15px;
    padding: 5px;
    border: 2px solid #fff;
    border-radius: 100%;
    position: absolute;
    left: 50%;
    top: 92vh;
    transform: translateX(-50%);
    animation: downs 2s linear infinite;
}

@keyframes downs {
    from {
        transform: translate(-50%, 0);
        opacity: .6;
    }
    to {
        transform: translate(-50%, 30px);
        opacity: .8;
    }
}

.ribbon {
    display: flex;
    justify-content: center;
    position: absolute;
    right: 20px;
    top: 20px;
}

.ribbon a {
    margin: 0 10px;
    color: #fff;
    text-decoration: none;
}

.icons {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    padding-top: 100vh;
    padding-right: 5%;
    padding-bottom: 15vh;
    padding-left: 5%;
}

.icons_items {
    flex: 1 1 200px;
    max-width: 200px;
    margin-top: 30px;
    margin-right: 40px;
    margin-bottom: 30px;
    margin-left: 40px;
    text-align: center;
    color: #fff;
}

.icons_items_imgs {
    width: 100%;
    max-width: 200px;
    margin-bottom: 15px;
}

.introduce {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 50px 5%;
}

.introduce_item {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    margin-bottom: 50px;
}

.introduce_item_img {
    width: 100%;
    max-width: 800px;
    height: auto;
    margin-bottom: 20px;
}

.introduce_item_title, .introduce_item_titles {
    width: 100%;
    max-width: 600px;
    font-size: 18px;
    line-height: 1.6;
    color: #fff;
    text-align: center;
    padding: 0 20px;
}

.footer {
    background: rgba(0, 0, 0, 0.5);
    padding: 20px;
    text-align: center;
    color: #fff;
}

.center {
    margin-bottom: 10px;
}

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

@media (max-width: 768px) {
    .title {
        font-size: 36px;
    }
    
    .titles {
        font-size: 16px;
    }
    
    .ribbon {
        position: static;
        margin-top: 20px;
    }
    
    .icons_items {
        flex: 1 1 100%;
        max-width: 100%;
    }
    
    .introduce_item_img {
        max-width: 100%;
    }
}