body {
      margin: 0;
      padding: 0;
      font-family: sans-serif;
      background: #111;
      color: #fff;
      min-height: 200vh;
    }

    section {
      padding: 100px;
      text-align: center;
      font-size: 24px;
    }

    /* Стили стрелки */
    #scroll-arrow {
      position: fixed;
      bottom: 20px;
      left: 50%;
      transform: translateX(-50%) translateY(40px);
      opacity: 0;
      cursor: pointer;
      z-index: 10000;
      transition: opacity 0.5s ease, transform 0.5s ease;
      pointer-events: none;
      width: 48px;
      height: 48px;
    }

    #scroll-arrow.visible {
      opacity: 1;
      transform: translateX(-50%) translateY(0);
      pointer-events: auto;
    }

    #scroll-arrow svg {
      width: 100%;
      height: 100%;
    }