.mask {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 1;
  background: rgba(0, 0, 0, 0.3); }

.dialog-wrap {
  position: fixed;
  top: 0;
  left: 0; }

.dialog {
  position: absolute;
  left: 50%;
  top: 50%;
  z-index: 1;
  display: inline-block;
  box-shadow: 0px 2px 8px rgba(0, 0, 0, 0.1);
  background: #fff; }

.dialog-head {
  line-height: 44px;
  color: #666;
  border-bottom: 1px solid #dadada;
  box-shadow: 0 1px 4px #ddd; }

.dialog-body {
  padding: 20px; }

.dialog-foot .btn {
  float: right; }

body {
  margin: 0; }

header {
  text-align: center;
  font-size: 24px;
  line-height: 32px;
  margin-bottom: 24px; }

.hide {
  display: none; }

#main {
  text-align: center; }

.dialog-foot .btn {
  font-size: 14px;
  line-height: 21px;
  margin: 10px; }