/* 简化版Font Awesome CSS，用于演示 */
.fa {
  display: inline-block;
  width: 1em;
  height: 1em;
  line-height: 1;
  font-family: 'FontAwesome';
  font-weight: normal;
  font-style: normal;
  text-decoration: inherit;
  text-transform: none;
  text-rendering: auto;
  speak: none;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* 简单的图标样式 */
.fa-refresh:before { content: "⟳"; }
.fa-bell:before { content: "🔔"; }
.fa-cog:before { content: "⚙️"; }
.fa-home:before { content: "🏠"; }
.fa-user:before { content: "👤"; }