.search-wrapper {
    display: flex;
    align-items: center;
    width: 380x;          /* 百度搜索框的经典宽度 */
    border: 1px solid #c4c7ce;
    border-radius: 10px;
    overflow: hidden;
    background: #fff;
  }
  .search-wrapper:focus-within {
    border-color: #4e6ef2;  /* 聚焦时变蓝 */
  }
  #searchTxt {
    flex: 1;
    height: 44px;
    padding: 0 16px;
    border: none;
    outline: none;
    font-size: 16px;
  }
  #searchSubmit {
    width: 60px;
    height: 44px;
    border: none;
    background: #4e6ef2 url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23fff' stroke-width='2.5' stroke-linecap='round'%3E%3Ccircle cx='11' cy='11' r='7'/%3E%3Cline x1='16.5' y1='16.5' x2='21' y2='21'/%3E%3C/svg%3E") center / 20px 20px no-repeat;
    cursor: pointer;
  }
  #searchSubmit:hover { background-color: #4662d9; }