.tb {
	display: table;
	width: 100%;
}

.td {
	display: table-cell;
	vertical-align: middle;
}

input, button {
	color: #fff;
	font-family: Nunito;
	padding: 0;
	margin: 0;
	border: 0;
	background-color: transparent;
}

#cover {
	/*position: absolute;*/
	top: 50%;
	left: 0;
	right: 0;
	width: 800px;
	padding: 35px;
	margin:2px auto 0 auto;
	background-color: #4c8cfd;
	border-radius: 20px;
	box-shadow: 0 10px 40px #0962ca, 0 0 0 20px #ffffffeb;
	transform: scale(0.6);
}

form {
	height: 96px;
}

input[type="text"] {
	width: 100%;
	height: 96px;
	font-size: 35px;
	line-height: 1;
}

input[type="text"]::placeholder {
	color: #001cbc;
}

#s-cover {
	width: 1px;
	padding-left: 20px;
}

button {
	position: relative;
   /* display: block;*/
	height: 60px;
	cursor: pointer;
}

#s-circle {
	position: relative;
	top: -8px;
	left: 0;
	width: 43px;
	height: 43px;
	margin-top: 0;
	border-width: 15px;
	border: 15px solid #fff;
	background-color: transparent;
	border-radius: 50%;
	transition: 0.5s ease all;
}

button span {
	position: absolute;
	top: 68px;
	left: 43px;
	display: block;
	width: 45px;
	height: 15px;
	background-color: transparent;
	border-radius: 10px;
	transform: rotateZ(52deg);
	transition: 0.5s ease all;
}

button span:before, button span:after {
	content: '';
	position: absolute;
	bottom: 0;
	right: 0;
	width: 45px;
	height: 15px;
	background-color: #fff;
	border-radius: 10px;
	transform: rotateZ(0);
	transition: 0.5s ease all;
}

#s-cover:hover #s-circle {
	top: -1px;
	width: 67px;
	height: 15px;
	border-width: 0;
	background-color: #fff;
	border-radius: 20px;
}

#s-cover:hover span {
	top: 50%;
	left: 56px;
	width: 25px;
	margin-top: -9px;
	transform: rotateZ(0);
}

#s-cover:hover button span:before {
	bottom: 11px;
	transform: rotateZ(52deg);
}

#s-cover:hover button span:after {
	bottom: -11px;
	transform: rotateZ(-52deg);
}

#s-cover:hover button span:before, #s-cover:hover button span:after {
	right: -6px;
	width: 40px;
	background-color: #fff;
}

#ytd-url {
	display: block;
	position: fixed;
	right: 0;
	bottom: 0;
	padding: 10px 14px;
	margin: 20px;
	color: #fff;
	font-family: Nunito;
	font-size: 14px;
	text-decoration: none;
	background-color: #ff7575;
	border-radius: 4px;
	box-shadow: 0 10px 20px -5px rgba(255, 117, 117, 0.86);
	z-index: 125;
}

/* 模态窗口的基本样式 */
.modal {
  z-index: 100;
  display: none; /* Hidden by default */
  position: fixed; /* Stay in place */
  z-index: 1; /* Sit on top */
  left: 0;
  top: 0;
  width: 100%; /* Full width */
  height: 100%; /* Full height */
  overflow: auto; /* Enable scroll if needed */
  background-color: rgb(0,0,0); /* Fallback color */
  background-color: rgba(0,0,0,0.4); /* Black w/ opacity */
}

/* 模态内容 */
.modal-content {
  background-color: #fefefe;
  margin: 15% auto; /* 15% from the top and centered */
  padding: 20px;
  border: 1px solid #888;
  width: 80%; /* Could be more or less, depending on screen size */
}

/* 关闭按钮 */
.close {
  color: #aaa;
  float: right;
  font-size: 28px;
  font-weight: bold;
}

.close:hover,
.close:focus {
  color: black;
  text-decoration: none;
  cursor: pointer;
}