html {
  overflow-y: scroll;
}

body,
h1,
h2,
h3,
h4,
h5,
h6,
p,
blockquote,
dl,
dt,
dd,
ul,
ol,
li,
pre,
fieldset,
button,
input,
textarea,
th,
td {
  margin: 0;
  padding: 0;
}

body,
button,
input,
select,
textarea {
  font: 12px/1 Tahoma, Helvetica, Arial, "SimSun", sans-serif;
}

body {
  min-width: 1000px;
  background: #fff url("./assets/background.jpg") center top no-repeat;
}

a {
  text-decoration: none;
}

button {
  border: 0;
  background: transparent;
  cursor: pointer;
}

.main {
  position: relative;
  width: 1000px;
  height: 1750px;
  margin: 0 auto;
  background: url("./assets/background.jpg") center top no-repeat;
}

.disclaimer {
  position: absolute;
  top: 535px;
  left: 20px;
  z-index: 100;
  display: inline-block;
  color: #efefef;
  font-size: 12px;
  line-height: 1;
}

.year {
  position: absolute;
  top: 83px;
  left: 12px;
  width: 246px;
  height: 40px;
  background: url("./assets/year29.jpg") -9px -1px no-repeat;
}

.hotspot {
  position: absolute;
  display: block;
  overflow: hidden;
  text-indent: -9999px;
}

.down1 {
  top: 343px;
  left: 538px;
  width: 229px;
  height: 58px;
}

.down3 {
  top: 868px;
  left: 873px;
  width: 128px;
  height: 50px;
  background: url("./assets/button.gif") no-repeat;
}

.down5 {
  top: 1578px;
  left: 744px;
  width: 125px;
  height: 46px;
}

.lecture-small {
  position: fixed;
  right: 10px;
  bottom: 10px;
  z-index: 200;
  width: 100px;
  height: 265px;
  background: url("./assets/bg_dl.jpg") no-repeat;
}

.lecture-small .down7 {
  top: 0;
  left: 0;
  width: 100px;
  height: 250px;
}

.num-small-lecture {
  position: absolute;
  top: 230px;
  left: 0;
  width: 100px;
  height: 20px;
  color: red;
  font-size: 10px;
  line-height: 20px;
  text-align: center;
}

.lecture-small-close {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100px;
  height: 15px;
  color: #666;
  font-size: 12px;
  line-height: 15px;
  text-align: center;
}

@media (max-width: 1000px) {
  .lecture-small {
    right: 4px;
  }
}