* {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
      font-family: "Source Han Sans CN", sans-serif;
    }

    body {
      /* max-width: 800px;
      margin: auto;
      padding: 0 20px; */
      background: var(--bg);
      padding: 0;
    }

    h1 {
      text-align: center;
      color: var(--text);
      margin-bottom: 20px;
    }

    .input-area {
      background: var(--btn-bg);
      padding: 20px;
      border-radius: 8px;
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
      margin-bottom: 20px;
    }

    textarea {
      width: 100%;
      height: 100px;
      padding: 12px;
      border: 1px solid #ddd;
      border-radius: 6px;
      resize: none;
      font-size: 14px;
    }

    .btn-group {
      margin-top: 10px;
      text-align: right;
    }

    button {
      padding: 8px 16px;
      border: none;
      border-radius: 6px;
      cursor: pointer;
      font-size: 14px;
      margin-left: 8px;
    }

    .btn-submit {
      background: #2196F3;
      color: #fff;
    }

    .btn-play {
      background: #4CAF50;
      color: #fff;
    }

    .btn-stop {
      background: #f44336;
      color: #fff;
    }

    .play-box {
      background: var(--btn-bg);
      padding: 30px;
      border-radius: 8px;
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
      min-height: 150px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 18px;
      color: var(--text);
      text-align: center;
    }

    .list-box {
      margin-top: 20px;
      background: var(--btn-bg);
      padding: 20px;
      border-radius: 8px;
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    }

    .item {
      padding: 10px;
      border-bottom: 1px solid #eee;
      font-size: 14px;
    }