Отсортируй по алфавиту классы и id в коде css, но ничего не удаляй и не изменяй. Оставь все функции и команды которые есть в коде @font-face {
    font-family: MyFont;
    src: url(../fonts/MultiroundPro.otf);
}

body, h2, ul, p {
    margin: 0;
    padding: 0;
}

body{
    font-family: MyFont;
    background-image: url(../media/фон7.jpg);
}

footer {
    position: fixed;
    left: 0;
    bottom: 0;
    width: 100%;
    background-color: #fffcf7;
    text-align: center;
    padding: 10px 0;
  }
  

.header {
    display: flex;
    flex-direction: column; 
    align-items: center;
    background: #fffcf7;
    padding: 10px;
    text-align: center;
    position: fixed;
        left: 50%;
        transform: translateX(-50%);
        width: 100%;
        z-index: 1000;
}

.header{
      border-radius: 15px;
      box-shadow: 0px 0px 10px rgba(0,0,0,0.5);
}

.header h1{
    font-size: 40px;
}

.header p{
    font-size: 20px;
}

.logo {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
}
.logo img {
    width: auto;
    height: 120px;
    margin-right: 10px;
    border-radius:100px;
}
.navigation {
    display: flex;
}
.navigation a {
    color: #000000;
    text-decoration: none;
    padding: 0 10px;
    margin-right: 5px;
    font-size: 22px;
    border: 1px solid black;
    border-radius: 10px;
}

.navigation a:hover{
    background-color: black;
    color: white;
}

main{
    padding-top: 200px;
    padding-bottom: 50px;
}

main h2{
    font-size: 42px;
}

main h3{
    font-size: 25px ;
}

main p{
    font-size: 24px;
}

#aboutus{
    width: 70%;
    margin: 20px auto;
    padding: 20px;
    background: #ffffff;
    text-align: center;
    border: 0px solid #ffffff;
      border-radius: 15px;
      box-shadow: 0px 0px 10px rgba(0,0,0,0.5);
    line-height: 1.6;
}

.blockS{
    width: 70%;
    margin: 20px auto;
    padding: 20px;
    background: #ffffff;
    text-align: center;
    border: 0px solid #ffffff;
      border-radius: 15px;
      box-shadow: 0px 0px 10px rgba(0,0,0,0.5);
}

.block1{
    width: 80%;
    margin: 20px auto;
    padding: 20px;
    background: #ffffff;
    text-align: center;
    border: 0px solid #ffffff;
      border-radius: 15px;
      box-shadow: 0px 0px 10px rgba(0,0,0,0.5);
}

.block2{
    width: 27%;
    padding: 20px;
    margin: 20px auto;
    background: #ffffff;
    text-align: center;
    border: 0px solid #ffffff;
      border-radius: 15px;
      box-shadow: 0px 0px 10px rgba(0,0,0,0.5);
}

#contacts{
    padding-top: 40px;
}


.block3{
    width: 85%;
    margin: 20px auto;
    padding: 20px;
    background: #ffffff;
    text-align: center;
    border: 0px solid #ffffff;
      border-radius: 15px;
      box-shadow: 0px 0px 10px rgba(0,0,0,0.5);
}

.block3a{
    width: 70%;
    margin: 20px auto;
    padding: 20px;
    background: #ffffff;
    text-align: center;
    border: 0px solid #ffffff;
      border-radius: 15px;
      box-shadow: 0px 0px 10px rgba(0,0,0,0.5);
}

.blockform{
    width: 27%;
    margin: 20px auto;
    padding: 40px;
    background: #ffffff;
    text-align: center;
    border-radius: 15px;
    box-shadow: 0px 0px 10px rgba(0,0,0,0.5);
}

#textus{
    font-size: 25px;
}


#services p{
    font-size: 20px;
}

.serv{
    display: grid; grid-template-columns:  1fr 1fr 1fr;
}

.serv img{
    height: 235px;
    width: auto;
    border-radius: 20px;
}

.serv div{
    width: 80%;
      margin: 20px auto;
      padding: 20px; 
      border-radius: 15px;
      box-shadow: 0px 0px 10px rgba(0,0,0,0.5); 
}

.pr1{
    display: grid; grid-template-columns:  1fr 1fr 1fr;
}

.pr2{
    display: grid; grid-template-columns:  1fr 1fr 1fr;
}


.prod div{
    width: 80%;
      margin: 20px auto;
      padding: 20px; 
      border-radius: 15px;
      box-shadow: 0px 0px 10px rgba(0,0,0,0.5); 
}

.prod img{
    height: 200px;
    width: auto;
    border-radius: 20px;
}

.cont{
    width: 80%;
    margin: 20px auto;
    padding: 20px;
    background: #f9f9f9;
    text-align: center;
    border: 1px solid #ccc;
      border-radius: 5px;
}


form {
    max-width: 400px;
    margin: 0px auto;
    padding: 20px;
    border: 1px solid #ccc;
    border-radius: 5px;
    background-color: #f9f9f9;
}

input[type="text"],
input[type="tel"],
input[type="email"],
input[type="password"],
input[type="date"],
input[select] {
    width: calc(100% - 22px);
    padding: 10px;
    margin-bottom: 20px;
    border: 1px solid #ccc;
    border-radius: 5px;
}

input[type="submit"] {
    background-color: #7c7c7c;
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 5px;
    cursor: pointer;
}

input[type="submit"]:hover {
    background-color: #007025;
}

#enter {
    font-size: 25px;
 }

 .form-input {
    margin-bottom: 10px;
    width: 100%;
    padding: 8px;
    border: 1px solid #ccc;
    border-radius: 4px;
 }
 .form-button {
    width: 30%;
    padding: 10px;
    border: none;
    background-color: #7c7c7c;
    color: white;
    border-radius: 4px;
    cursor: pointer;
 }
 .form-button:hover {
    background-color: #007025;
 }

 .news-item {
    display: flex;
    margin-bottom: 20px;
    align-items: flex-start;
}
.news-item img {
    margin-right: 15px;
    width: 300px;
    height: auto;
    border-radius: 10px;
}
.news-text {
    flex: 1;
}
.news-text h3 {
    margin-top: 0;
}

#news1{
    width: 95%;
    margin: 20px auto;
    padding: 20px;
    background: #f9f9f9;
    text-align: center;
    border: 1px solid #ccc;
      border-radius: 5px;
}

#news2{
    width: 95%;
    margin: 20px auto;
    padding: 20px;
    background: #f9f9f9;
    text-align: center;
    border: 1px solid #ccc;
      border-radius: 5px;
}

#news3{
    width: 95%;
    margin: 20px auto;
    padding: 20px;
    background: #f9f9f9;
    text-align: center;
    border: 1px solid #ccc;
      border-radius: 5px;
}

.actiongame{
    width: 95%;
    margin: 20px auto;
    padding-bottom: 20px;
    background: #f9f9f9;
    text-align: center;
    border: 1px solid #ccc;
      border-radius: 15px;
}

.card {
    width: 100px;
    height: 100px;
    display: inline-block;
    background-color: #f0f0f0;
    margin: 10px;
    text-align: center;
    line-height: 100px;
    font-size: 24px;
    cursor: pointer;
    user-select: none;
}

.card {
    background-size: cover;
    background-position: center;
}

.hidden {
    visibility: hidden;
}

  footer {
    color: rgb(0, 0, 0);
    text-align: center;
    padding: 10px 0;
    font-size: 20px;
}

.cat{
    align-items: center;
    text-align: center;
}

.cat img{
    height: 700px;
    width: auto;
}

.reviews-section {
    background: #ffffff;
    padding: 20px;
    border-radius: 15px;
    box-shadow: 0px 0px 10px 2px rgba(0,0,0,0.25);
    margin: 40px auto;
    width: 70%;
    text-align: center;
}

.review h3 {
    color: #007025;
    margin: 10px 0;
}

.review p h3 {
    color: #333;
    font-size: 18px;
    line-height: 1.5;
    text-align: justify;
}

.style-select{
        width: 100%;
        padding: 10px;
        margin-bottom: 20px;
        border: 1px solid #ccc;
        border-radius: 5px;
        -webkit-appearance: none;
        -moz-appearance: none;
        appearance: none;
        cursor: pointer;
}

#deals img{
    justify-content: center;
    margin-right: 15px;
    width: 600px;
    height: auto;
    border-radius: 10px;
}

.blockD{
    width: 90%;
    margin: 20px auto;
    padding: 20px;
    background: #ffffff;
    text-align: center;
    border: 0px solid #ffffff;
      border-radius: 15px;
      box-shadow: 0px 0px 10px rgba(0,0,0,0.5);
}

.deal{
    display: grid; grid-template-columns:  1fr 1fr 1fr;
}

.deal img{
    height: 300px;
    width: auto;
    border-radius: 20px;
}

.deal .d1{
    width: 85%;
      margin: 20px auto;
      padding: 20px; 
      border-radius: 15px;
      box-shadow: 0px 0px 10px rgba(0,0,0,0.5); 
}