nter(new-counter) ") ";
      counter-increment: my-counter;
    }

    @media (max-width: 768px) {
      body {
        padding: 30px;
      }

      .chapter {
        min-width: auto;
        padding: 60px 40px;
      }
    }
  </style>
</head>
<body>
  <section class="chapter">
    <h2 class="chapter__title">Содержание</h2>
    <ol class="list">
      <li class="list__item">Определение.</li>
      <li class="list__item">Свойства.</li>
      <li class="list__item">Списк�