body {
  background: #5dd1ff;
  display: flex;
  flex-direction: column;
}
.container {
  width: 700px;
  margin: 0 auto;
}
h1 {
  font-family: Playfair Display, 'Times New Roman', Times, serif;
  font-size: 50px;
  margin: 50px 0 30px;
}
hr {
  width: 200px;
  background: #000;
  margin: 15px 0;
  border: none;
  height: 2px;
}
.trois-items {
  margin: 50px 0;
  display: flex;
  justify-content: center;
  align-items: center;
}
.txt-info {
  font-size: 18px;
}
.trois-items img {
  width: 100px;
}
.item {
  margin: 0 25px;
  text-align: center;
}
.item h3 {
  font-size: 22px;
  font-weight: bold;
  margin: 10px 0;
}

.btn-contact {
  display: block;
  text-align: center;
  text-decoration: none;
  color: #000;
  font-size: 25px;
  border: 1px solid #000;
  width: 300px;
  padding: 10px;
  margin: 20px auto 70px;
  border-radius: 5px;
}

@media screen and (max-width: 700px) {
  h1 {
    margin: 30px 0 30px;
    font-size: 40px;
  }
  .container {
    width: 100%;
    padding: 0 20px;
  }
  .trois-items {
    margin: 30px 0;
    flex-direction: column;
  }
  .item {
    margin: 25px;
    text-align: center;
  }
  .btn-contact {
    font-size: 22px;
    width: 200px;
    padding: 5px;
    margin: 20px auto 50px;
  }
}