@charset "utf-8";
* {
  box-sizing: border-box;
}

/* Add a pointer when hovering over the thumbnail images */
img {
  vertical-align: middle;
}


.container {
  position: relative;
}/* Position the image container (needed to position the left and right arrows) */



.mySlides {
  display: none;
}/* Hide the images by default */

.cursor {
  cursor: pointer;
} /* Add a pointer when hovering over the thumbnail images cursor 改變滑鼠游標的形狀 ≡*/

/* Next & previous buttons */
.prev,
.next {
  cursor: pointer;
  position: absolute;
  top: 40%;
  width: auto;
  padding: 16px;
  margin-top: -50px;
   color:#FFFFFF;
  font-weight: bold;
  font-size: 20px;
  border-radius: 0 3px 3px 0;
  user-select: none;
  -webkit-user-select: none;
}

/* Position the "next button" to the right */
.next {
  right: 0;
  border-radius: 3px 0 0 3px;
}

.prev {
  left: 0;
  border-radius: 3px 0 0 3px;
}
/* On hover, add a black background color with a little bit see-through */
.prev:hover,
.next:hover {
  background-color: rgba(0,0,0, 0.8);
}

/* Number text (1/3 etc) */
.numbertext {
  color: #f2f2f2;
  font-size: 12px;
  padding: 8px 12px;
  position: absolute;
  top: 0;
}

/* Container for image text */
.caption-container {
  text-align: center;
  background-color: #FFFFFF;
  padding: 1px 16px;
 font-size: 1.5rem;
  } 


.row:after {
  content: "";
  display: table;
  clear: both;

}

/* four columns side by side */
.column {
  float: left;
  width: 25%;
    align:center;
}

/* Add a transparency effect for thumnbail images */
.demo {
  opacity: 0.6;
}

.active,
.demo:hover {
  opacity: 1;
}

.img{width:100vh;hieght:auto;}
.col-md-3{padding:0px 0px 0px 0px ;}


/* go to top */
.back-to-top {
    position: fixed;
    bottom: 25px;
    right: 25px;
    display:none;
}