/* 2:   Default styles
/* ---------------------------------------------- */

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




/* Custom overlay navigation
/* ---------------------------------------------- */
.button_container {
    position: relative;
    margin-top: 32px;
    height: 28px;
    width: 50px;
    cursor: pointer;
    z-index: 999;
    -webkit-transition: opacity .25s ease;
            transition: opacity .25s ease;
}

/* Animate the top hamburger bar */
.button_container.active .top {
    -webkit-transform: translateY(8px) translateX(0) rotate(45deg);
        -ms-transform: translateY(8px) translateX(0) rotate(45deg);
            transform: translateY(8px) translateX(0) rotate(45deg);
    background: #FFF;
}

/* Set the middle hamburger bar's opacity to 0  */
.button_container.active .middle {
    opacity: 0;
    background: #FFF;
}

/* Animate the bottom hamburger bar */
.button_container.active .bottom {
    -webkit-transform: translateY(-8px) translateX(0) rotate(-45deg);
        -ms-transform: translateY(-8px) translateX(0) rotate(-45deg);
            transform: translateY(-8px) translateX(0) rotate(-45deg);
    background: #FFF;
}

.button_container span {
    background: #000;
    border: none;
    height:3px;
    width: 100%;
    position: absolute;
    top: 0;
    left: 0;
    -webkit-transition: all .35s ease;
    transition: all .35s ease;
    cursor: pointer;
}

.button_container span:nth-of-type(2) {
    top: 8px;
}

.button_container span:nth-of-type(3) {
    top: 16px;
}

/* The overlay */
.overlay {
    position: fixed;
    display: block; 
    background: rgba(0,0,0, 1); /* Primary color, can be changed via colors.css */
    top: 0;
    border: 0;
    left: 0;
    z-index: 100;
    width: 100%;
    height: 0%;
    opacity: 0;
    visibility: hidden;
    -webkit-transition: opacity .35s, visibility .35s, height .35s;
            transition: opacity .35s, visibility .35s, height .35s;
   overflow:hidden;
}

.overlay.open {
    opacity: .95;
    visibility: visible;
    height: 100%; overflow:hidden
}

.overlay.open li {
    -webkit-animation: fadeInRight .5s ease forwards;
            animation: fadeInRight .5s ease forwards;
    -webkit-animation-delay: .35s;
        animation-delay: .35s;
}

.overlay.open li:nth-of-type(1) {
    -webkit-animation-delay: .40s;
            animation-delay: .40s;
}

.overlay.open li:nth-of-type(2n) {
    -webkit-animation-delay: .50s;
            animation-delay: .50s;
}

.overlay nav {
    position: relative;
    height: 50%;
    top: 50%;
    font-size: 30px;
    text-transform: none;
    font-weight: 600;
    text-align: center;
    -webkit-transform: translateY(-50%);
        -ms-transform: translateY(-50%);
            transform: translateY(-50%);
}

.overlay ul {
    list-style: none;
    padding: 0;
    margin: 0 auto;
    display: inline-block;
    position: relative;
    height: 100%; width:100%;
}

.overlay ul li {
    display: block;
    height: 15%;
    height: calc(100% / 8);
    min-height: 65px;
    position: relative;
    opacity: 0;
}

.overlay ul li a {
    display: block;
    position: relative;
    color: #fff;
    text-decoration: none;
    overflow: hidden; font-size:60px; line-height:60px;
}

.overlay ul li a:hover:after,
.overlay ul li a:focus:after,
.overlay ul li a:active:after {
    width: 50%;
}


.daohang{ width:50px; float:right}



/* 11.  CSS3 Animations
/* ---------------------------------------------- */

/* Hero unit mouse animation */


/* Navigation link animation */

@-webkit-keyframes fadeInRight {
    0% {
        opacity: 0;
        left: 20%;
    }
    100% {
        opacity: 1;
        left: 0;
    }
}

@keyframes fadeInRight {
    0% {
        opacity: 0;
        left: 20%;
    }
    100% {
        opacity: 1;
        left: 0;
    }
}


@media screen and (max-width: 768px) {
.button_container{ margin-top:20px;}
.overlay nav {
    position: relative;
    height: 50%;
    top: 40%;
    font-size: 30px;
    text-transform: none;
    font-weight: 600;
    text-align: center;
    -webkit-transform: translateY(-60%);
        -ms-transform: translateY(-60%);
            transform: translateY(-60%);
}
}