html, body {
  height: 100%;
  margin: 0;
  padding: 0; }

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

ol, ul {
  list-style: none;
  list-style-type: none; }

a {
  outline: none;
  /* for Firefox */
  hlbr: expression(this.onFocus=this.blur());
  /* for IE */
  cursor: pointer; }

a:link, a:visited, a:hover, a:active {
  text-decoration: none; }

body {
  background: url(../img/pagbg.jpg) no-repeat top center; }

.nav-box {
  width: 1000px;
  height: 379px;
  background: url(../img/logo_bg.png) no-repeat center 40px;
  margin: 0 auto;
  position: relative; }

.nav {
  width: 985px;
  height: 200px;
  background: url(../img/nav_bar_bg.png) no-repeat;
  position: absolute;
  bottom: 0;
  left: 7px; }

.nav-btn {
  height: 28px;
  margin: 137px 0 0 100px; }
  .nav-btn li {
    width: 85px;
    height: 28px;
    float: left;
    margin: 0 16px 0 0;
    position: relative;
    cursor: pointer; }
    .nav-btn li:hover .menu {
      display: block; }
    .nav-btn li:hover .nav-img {
      top: -3px; }

.nav-img {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 10;
  transition: .3s; }

.btn-join {
  width: 200px;
  height: 200px;
  background: url(../img/btn_join.png) no-repeat;
  display: block;
  position: absolute;
  bottom: 0;
  left: 393px;
  transition: .3s; }
  .btn-join:hover {
    bottom: 10px; }

.menu {
  width: 105px;
  padding: 30px 0 70px;
  background: linear-gradient(294deg, black, black 50%, #3c3c3c 51%, #838383 100%);
  outline: 1px solid #323232;
  position: absolute;
  bottom: -30px;
  left: -10px;
  display: none;
  box-shadow: 0 0 10px black;
  border-radius: 5px;
}
  .menu a {
    font-size: 13px;
    color: #ccc;
    text-align: center;
    line-height: 15px;
    padding: 4px 0;
    display: block;
    transition: .3s; }
    .menu a:hover {
      color: #fff; }

.border-top {
  width: 105px;
  height: 45px;
  background: url(../img/up_border.png) no-repeat;
  position: absolute;
  top: -17px;
}

.border-bot {
  width: 105px;
  height: 45px;
  background: url(../img/bot_border.png) no-repeat;
  position: absolute;
  bottom: -19px; }