body {
      font-family: 'Montserrat', sans-serif;
      margin: 0;
      padding: 0;
      background: #fdfdfd;
      color: #222;
      line-height: 1.6;
    }

    .head_exp{

    top:0;
	text-align: center;
    background-color: #000000;
    padding-top: 3px;
	padding-bottom: 3px;
    position: fixed;
    display: block;
    width: 100%;
	height: 50px;
    border-bottom-color: #000000;
    border-right-width: 1px;
    border-bottom-style:solid;
    z-index: 99;
    -webkit-transition: background-color 0.5s ease-out; -moz-transition: 
    background-color 0.5s ease-out; -o-transition: background-color 0.5s ease-out; transition: background-color 0.5s ease-out;
    }

    header {
      background: linear-gradient(135deg, #000, #333);
      background-image: url(../img/portada-oppo.jpg);
      block-size: cover;
      position: relative;
      min-height: 92vh;
      color: #fff;
      text-align: center;
      padding: 80px 20px;
    }
    header h1 {
      font-size: 2.8rem;
      margin-bottom: 20px;
    }
    header p {
      font-size: 1.2rem;
      max-width: 700px;
      margin: 0 auto;
    }
    section {
      padding: 20px 20px;
      max-width: 1200px;
      margin: auto;
    }
    section h2 {
      font-size: 2rem;
      margin-bottom: 20px;
      color: #111;
    }
    section p {
      font-size: 1rem;
      margin-bottom: 20px;
    }
    .split {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 40px;
    }
    .split .text {
      flex: 1 1 50%;
    }
    .split .image {
      flex: 1 1 50%;
    }
    .split img {
      width: 100%;
      border-radius: 12px;
      box-shadow: 0 8px 20px rgba(0,0,0,0.15);
    }

    .full-image img {
      width: 100%;
      border-radius: 12px;
      box-shadow: 0 8px 20px rgba(0,0,0,0.15);
    }
    footer {
      background: #111;
      color: #fff;
      text-align: center;
      padding: 40px 20px;
    }
    .btn {
      display: inline-block;
      background: #e60023;
      color: #fff;
      padding: 14px 28px;
      border-radius: 30px;
      text-decoration: none;
      font-weight: 600;
      transition: background 0.3s ease;
    }
    .btn:hover {
      background: #c0001d;
    }
    @media(max-width:768px){
      .split {
        flex-direction: column;
      }
    }