/* Reset CSS */
html {
    font-size: 62.5%;
  }
  
  *, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  
  body {
    font-family: 'Open Sans', sans-serif;
    font-size: 1.6rem;
    line-height: 1.6;
    color: #333;
  }
  
  a {
    text-decoration: none;
    color: inherit;
  }
  
  /* Global styles */
  .psk-container {
    max-width: 120rem;
    margin: 0 auto;
    padding: 0 1.6rem;
  }
  
  .psk-header {
    background-color: #fff;
    box-shadow: 0 0 2rem rgba(0, 0, 0, 0.1);
    position: fixed;
    width: 100%;
    z-index: 999;
  }
  
  .psk-nav__list {
    display: flex;
    /*justify-content: flex-end;*/
  }
  
  .psk-nav__item:not(:last-child) {
    margin-right: 2.4rem;
  }
  
  .psk-brand {
    font-weight: 700;
  }
  
  .psk-button {
    display: inline-block;
    padding: 1.2rem 3rem;
    font-size: 1.6rem;
    font-weight: 600;
    text-align: center;
    text-transform: uppercase;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s ease-in-out;
  }
  
  .psk-button:hover {
    transform: translateY(-2px);
  }
  
  .psk-button--primary {
    color: #fff;
    background-color: #00A3FF;
    border: none;
  }
  
  .psk-button--primary:hover {
    background-color: #0092E0;
  }
  
  .psk-banner {
    height: 80vh;
    display: flex;
    align-items: center;
    color: #fff;
    background-image: url('../images/2.gif');
    background-size: cover;
    background-position: center;
    text-align: center;
  }
  
  .psk-banner h1 {
    font-size: 5rem;
    margin-bottom: 2.4rem;
  }
  
  .psk-banner p {
    font-size: 2rem;
    margin-bottom: 4.8rem;
  }
  
  .psk-section h2 {
    font-size: 3.2rem;
    margin-bottom: 2.4rem;
  }
  
  .features {
    list-style: disc;
    margin-left: 2.4rem;
    margin-bottom: 4.8rem;
  }
  
  .evaluation__item {
    display: flex;
    align-items: center;
    margin-bottom: 4.8rem;
  }
  
  .evaluation__img {
    width: 10rem;
    height: 10rem;
    margin-right: 2.4rem;
    object-fit: cover;
    border-radius: 50%;
  }
  
  .evaluation__name {
    font-size: 2.4rem;
    margin-bottom: 1.6rem;
  }
  
  .user-case__item {
    display: flex;
    margin-bottom: 4.8rem;
  }
  
  .user-case__img {
    width: 25rem;
    height: 18.75rem;
    margin-right: 2.4rem;
    object-fit: cover;
  }
  
  .user-case__desc {
    font-size: 1.8rem;
    line-height: 2.8rem;
  }
  
  .psk-footer {
    padding: 4.8rem 0;
  }
  
  .psk-footer__content {
    display: flex;
    justify-content: space-between;
    align-items: center;
  }
  
  .psk-footer__left {
    font-size: 1.8rem;
    color: #666;
  }
  
  .psk-footer__right a:not(:last-child) {
    margin-right: 1.6rem;
  }
  
  @media screen and (max-width: 768px) {
    .psk-nav {
      display: flex;
      flex-direction: column;
      align-items: center;
      background-color: #fff;
      position: fixed;
      top: 0;
      left: -100%;
      height: 100vh;
      width: 80%;
      z-index: 9999;
      transition: all 0.5s ease-in-out;
    }
  
    .psk-nav--active {
      left: 0;
    }
  
    .psk-nav__list {
      flex-direction: column;
      margin-top: 4.8rem;
    }
  
    .psk-nav__item:not(:last-child) {
      margin-right: 0;
      margin-bottom: 1.6rem;
    }
  
    .psk-brand {
      display: block;
      text-align: center;
      margin-bottom: 3.2rem;
    }
  
    .psk-button {
      width: 100%;
      margin-top: 2.4rem;
    }
  
    .psk-banner {
      height: auto;
      min-height: 50vh;
      padding: 9.6rem 0;
    }
  
    .psk-banner h1 {
      font-size: 4rem;
      margin-bottom: 1.6rem;
    }
  
    .psk-banner p {
      font-size: 1.8rem;
      margin-bottom: 3.2rem;
    }
  
    .evaluation__item {
      flex-direction: column;
      margin-bottom: 3.2rem;
    }
  
    .evaluation__img {
      width: 6rem;
      height: 6rem;
      margin-right: 0;
      margin-bottom: 1.6rem;
    }
  
    .user-case__item {
      flex-direction: column;
      align-items: center;
      margin-bottom: 3.2rem;
    }
  
    .user-case__img {
      width: 100%;
      height: auto;
      margin-right: 0;
      margin-bottom: 1.6rem;
    }
  }