* {
    transition: background-color 300ms ease, color 300ms ease;
}

*:focus {
    background-color: rgba(221, 72, 20, .2);
    outline: none;
}

html, body {
    color: rgba(33, 37, 41, 1);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji';
    font-size: 16px;
    margin: 0;
    padding: 0;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

header {
    background-color: rgba(247, 248, 249, 1);
    padding: .4rem 0 0;
}

.menu {
    padding: .4rem 2rem;
}

header ul {
    border-bottom: 1px solid rgba(242, 242, 242, 1);
    list-style-type: none;
    margin: 0;
    padding: 0;
    text-align: right;
}

header li {
    display: inline-block;
}

header li a {
    border-radius: 5px;
    color: rgba(0, 0, 0, .5);
    display: block;
    height: 44px;
    text-decoration: none;
}

header li.menu-item a {
    border-radius: 5px;
    margin: 5px 0;
    height: 38px;
    line-height: 36px;
    padding: .4rem .65rem;
    text-align: center;
}

header li.menu-item a:hover,
header li.menu-item a:focus {
    background-color: rgba(221, 72, 20, .2);
    color: rgba(221, 72, 20, 1);
}

header .logo {
    float: left;
    height: 44px;
    padding: .4rem .5rem;
}

header .menu-toggle {
    display: none;
    float: right;
    font-size: 2rem;
    font-weight: bold;
}

header .menu-toggle button {
    background-color: rgba(221, 72, 20, .6);
    border: none;
    border-radius: 3px;
    color: rgba(255, 255, 255, 1);
    cursor: pointer;
    font: inherit;
    font-size: 1.3rem;
    height: 36px;
    padding: 0;
    margin: 11px 0;
    width: 40px;
}

header .menu-toggle button:hover,
header .menu-toggle button:focus {
    background-color: rgba(221, 72, 20, .8);
    color: rgba(255, 255, 255, .8);
}

header .heroe {
    margin: 0 auto;
    max-width: 1100px;
    padding: 1rem 1.75rem 1.75rem 1.75rem;
}

header .heroe h1 {
    font-size: 2.5rem;
    font-weight: 500;
}

header .heroe h2 {
    font-size: 1.5rem;
    font-weight: 300;
}

section {
    margin: 0 auto;
    max-width: 1100px;
    padding: 2.5rem 1.75rem 3.5rem 1.75rem;
}

section h1 {
    margin-bottom: 2.5rem;
}

section h2 {
    font-size: 120%;
    line-height: 2.5rem;
    padding-top: 1.5rem;
}

section pre {
    background-color: rgba(247, 248, 249, 1);
    border: 1px solid rgba(242, 242, 242, 1);
    display: block;
    font-size: .9rem;
    margin: 2rem 0;
    padding: 1rem 1.5rem;
    white-space: pre-wrap;
    word-break: break-all;
}

section code {
    display: block;
}

section a {
    color: rgba(221, 72, 20, 1);
}

section svg {
    margin-bottom: -5px;
    margin-right: 5px;
    width: 25px;
}

.further {
    background-color: rgba(247, 248, 249, 1);
    border-bottom: 1px solid rgba(242, 242, 242, 1);
    border-top: 1px solid rgba(242, 242, 242, 1);
}

.further h2:first-of-type {
    padding-top: 0;
}

footer {
    background-color: rgba(221, 72, 20, .8);
    text-align: center;
}


footer .copyrights {
    background-color: rgba(62, 62, 62, 1);
    color: rgba(200, 200, 200, 1);
    padding: .25rem 1.75rem;
}

@media (max-width: 629px) {
    header ul {
        padding: 0;
    }

    header .menu-toggle {
        padding: 0 1rem;
    }

    header .menu-item {
        background-color: rgba(244, 245, 246, 1);
        border-top: 1px solid rgba(242, 242, 242, 1);
        margin: 0 15px;
        width: calc(100% - 30px);
    }

    header .menu-toggle {
        display: block;
    }

    header .hidden {
        display: none;
    }

    header li.menu-item a {
        background-color: rgba(221, 72, 20, .1);
    }

    header li.menu-item a:hover,
    header li.menu-item a:focus {
        background-color: rgba(221, 72, 20, .7);
        color: rgba(255, 255, 255, .8);
    }
}


.video-box {
    position: relative;
    height: 100vh;
    background-color: #C1CFF7;
    /* cut video*/
    overflow: hidden;
}

.video-box .video-background {
    position: absolute;
    left: 50%;
    top: 50%;
    /*align center*/
    transform: translate(-50%, -50%);
    width: 100%;
    height: auto;
    /*fill scan*/
    object-fit: cover;
    min-height: 800px;
}