.cl_sousentete {
  background: linear-gradient(#2efec8, #9e9e9e);
  padding: 20px;
  margin: auto;
  cursor: default;
}

.cl_info {
  display: block;
  margin: 0;
  overflow: hidden;
  position: relative;
  width: 100%;
  height: 40px;
}
.cl_info div {
  position: absolute;
  max-width: 100%;
}
div .cl_a {
  color: blue;
  top: 0;
  left: 0;
  display: inline-block;
  white-space: nowrap;
  font-weight: bold;
  font-family: Arial, Helvetica, sans-serif;
}
div .cl_b {
  color: black;
  top: 0;
  left: 120px;
  display: inline-block;
  white-space: nowrap;
  font-weight: normal;
  font-family: Arial, Helvetica, sans-serif;
}
.cl_info :first-child {
  position: absolute;
  animation: defilement1 30s infinite linear;
}

@keyframes defilement1 {
  0% {
    margin-left: 110%;
  }
  100% {
    margin-left: -60%;
  }
}