html, body, div, span, applet, object, iframe,
h1, h2, h3, h4, h5, h6, p, blockquote, pre,
a, abbr, acronym, address, big, cite, code,
del, dfn, em, img, ins, kbd, q, s, samp,
small, strike, strong, sub, sup, tt, var,
b, u, i, center,
dl, dt, dd, ol, ul, li,
fieldset, form, label, legend,
table, caption, tbody, tfoot, thead, tr, th, td,
article, aside, canvas, details, embed,
figure, figcaption, footer, header, hgroup,
menu, nav, output, ruby, section, summary,
time, mark, audio, video {
  margin: 0;
  padding: 0;
  border: 0;
  font: inherit;
  font-size: 100%;
  vertical-align: baseline;
}

html {
  line-height: 1;
}

ol, ul {
  list-style: none;
}

table {
  border-collapse: collapse;
  border-spacing: 0;
}

caption, th, td {
  text-align: left;
  font-weight: normal;
  vertical-align: middle;
}

q, blockquote {
  quotes: none;
}
q:before, q:after, blockquote:before, blockquote:after {
  content: "";
  content: none;
}

a img {
  border: none;
}

article, aside, details, figcaption, figure, footer, header, hgroup, main, menu, nav, section, summary {
  display: block;
}

* {
  box-sizing: border-box;
}

html {
  font-size: 62.5%;
}

a {
  -webkit-transition: all .2s ease 0s;
  transition: all .2s ease 0s;
}

.cf {
  *zoom: 1;
}
.cf:after {
  content: "";
  display: table;
  clear: both;
}

img {
  max-width: 100%;
  height: auto;
}

html, body, .container {
  height: 100%;
}

body {
  background-image: url(../img/challenge_office/bg_wonderful_world.png);
  background-repeat: no-repeat;
  background-position: top center;
  background-size: cover;
  min-height: 580px;
  min-width: 900px;
  width: 100%;
  overflow: hidden;
}

.container {
  width: 900px;
  margin: 0 auto;
  position: relative;
}

.siteid {
  position: absolute;
  top: 35px;
  left: 6px;
  opacity: 0;
}

.siteid, .s1, .s2, .s3, .s3-2, .s3-3, .s4 {
  position: absolute;
}

.siteid, .s1, .s2, .s3, .s3-3, .s4, .bnr {
  opacity: 0;
}

.s3-2 {
  display: none;
}

.s1 {
  top: 137px;
  right: 0;
  left: 0;
  text-align: center;
  margin: auto;
  width: 219.5px;
  height: 53px;
}

.s2 {
  top: 180px;
  left: 0;
  right: 0;
  text-align: center;
  margin: auto;
}

.s3 {
  top: 282px;
  right: 90px;
  /*
    top:(676px/2);
    right: (224px/2); 
  */
}

.s3-2 {
  top: 291px;
  right: 90px;
}

.s3-3 {
  top: 278px;
  right: 90px;
}

.s4 {
  top: 423px;
  left: 0;
  right: 0;
  text-align: center;
  margin: auto;
}

.s4 a {
  display: inline-block;
}
.s4 a:hover {
  -webkit-transform: scale(1.1);
          transform: scale(1.1);
  box-shadow: #fff 0px 0px 10px;
}

/**
 * bnr
 */
.bnr {
  position: absolute;
  bottom: 20px;
  left: 0;
  right: 0;
  text-align: center;
  margin: auto;
  overflow: hidden;
}

.bnr ul {
  float: left;
  left: 50%;
  position: relative;
}

.bnr li {
  float: left;
  left: -50%;
  position: relative;
  margin: 0 4px;
}