/* 
 * FontAwesome 备用图标库
 * 用于在 FontAwesome CDN 无法加载时提供基本图标支持
 */

[class*="fa-"] {
  display: inline-block;
  font-style: normal;
  font-variant: normal;
  font-weight: normal;
  font-family: sans-serif;
  text-rendering: auto;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* 基本标记图标 */
.fa-home:before { content: "🏠"; }
.fa-search:before { content: "🔍"; }
.fa-play-circle:before { content: "▶️"; }
.fa-exchange-alt:before { content: "🔄"; }
.fa-sim-card:before { content: "💳"; }
.fa-calendar-alt:before { content: "📅"; }
.fa-tools:before { content: "🔧"; }
.fa-star:before { content: "⭐"; }
.fa-key:before { content: "🔑"; }
.fa-code:before { content: "{ }"; }
.fa-folder:before, .fa-folder-open:before { content: "📁"; }
.fa-compress:before { content: "📦"; }
.fa-moon:before { content: "🌙"; }
.fa-sun:before { content: "☀️"; }
.fa-github:before { content: "GH"; }
.fa-weixin:before { content: "WX"; }
.fa-envelope:before { content: "✉️"; }
.fa-tag:before { content: "🏷️"; }
.fa-globe:before { content: "🌐"; }
.fa-toolbox:before { content: "🧰"; }
.fa-dragon:before { content: "🐉"; }
.fa-id-card:before { content: "🪪"; }
.fa-calendar-day:before { content: "📆"; }
.fa-chevron-down:before { content: "▼"; }
.fa-chevron-up:before { content: "▲"; }

/* 图标大小 */
.fa-lg {
  font-size: 1.33333em;
  line-height: 0.75em;
  vertical-align: -0.0667em;
}

.fa-2x { font-size: 2em; }
.fa-3x { font-size: 3em; }
.fa-4x { font-size: 4em; }
.fa-5x { font-size: 5em; }

/* 图标样式 */
.fas, .fa-solid { font-weight: bold; }
.far, .fa-regular { font-weight: normal; }
.fab, .fa-brands { font-style: italic; }