.u-section-1 {
  background-position: 50% 50%;
  background-repeat: no-repeat;
  background-image: url("images/site-planche-01.png");
  background-size: cover;
  min-height: 889px;
}

.u-section-1 .u-image-1 {
  height: 756px;
  margin: 2px auto 0;
}

.u-section-1 .u-image-2 {
  height: 360px;
  margin-top: -230px;
  margin-bottom: 0;
}

.u-section-1 .u-btn-1 {
  --radius: 50px;
  font-weight: 700;
  text-transform: uppercase;
  font-size: 0.875rem;
  letter-spacing: 1px;
  background-image: none;
  margin: -170px auto 0;
}

.u-section-1 .u-text-1 {
  font-size: 0.875rem;
  width: 631px;
  margin: 82px auto 8px;
}

.u-section-1 .u-btn-2 {
  background-image: none;
  padding: 0;
}

.u-section-1 .u-btn-3 {
  background-image: none;
  padding: 0;
}

@media (max-width: 1399px) {
   .u-section-1 {
    min-height: 768px;
  }
}

@media (max-width: 1199px) {
   .u-section-1 {
    min-height: 890px;
  }

  .u-section-1 .u-image-1 {
    margin-right: initial;
    margin-left: initial;
  }

  .u-section-1 .u-btn-1 {
    margin-top: -171px;
  }

  .u-section-1 .u-text-1 {
    margin-top: 83px;
  }
}

@media (max-width: 991px) {
  .u-section-1 .u-btn-1 {
    margin-top: -176px;
  }

  .u-section-1 .u-text-1 {
    margin-top: 88px;
  }
}

@media (max-width: 767px) {
   .u-section-1 {
    min-height: 864px;
  }

  .u-section-1 .u-image-1 {
    margin-top: 0;
    margin-right: initial;
    margin-left: initial;
  }

  .u-section-1 .u-image-2 {
    height: 336px;
    margin-top: -228px;
  }

  .u-section-1 .u-btn-1 {
    font-size: 0.75rem;
    margin-top: -146px;
    padding: 0 7px;
  }

  .u-section-1 .u-text-1 {
    width: 540px;
  }
}

@media (max-width: 575px) {
   .u-section-1 {
    min-height: 716px;
  }

  .u-section-1 .u-image-2 {
    height: 188px;
  }

  .u-section-1 .u-btn-1 {
    margin-top: -94px;
  }

  .u-section-1 .u-text-1 {
    font-size: 0.625rem;
    width: 340px;
    margin-top: 45px;
    margin-bottom: 0;
  }
}.bouee {
  display: block; /* permet le centrage via margin auto */
  margin-left: auto;
  margin-right: auto;
  animation: flotter 4s ease-in-out infinite;
  transform-origin: center;
}
@keyframes flotter {
  0%   { transform: translate(0, 0) rotate(0deg); }
  25%  { transform: translate(2px, -6px) rotate(-2deg); }
  50%  { transform: translate(0, -10px) rotate(0deg); }
  75%  { transform: translate(-2px, -6px) rotate(2deg); }
  100% { transform: translate(0, 0) rotate(0deg); }
}