/* Font Awesome 图标库本地简化版 */
.fas, .fab {
    -moz-osx-font-smoothing: grayscale;
    -webkit-font-smoothing: antialiased;
    display: inline-block;
    font-style: normal;
    font-variant: normal;
    text-rendering: auto;
    line-height: 1;
}

/* Solid Icons */
.fas {
    font-family: 'Font Awesome 5 Free';
    font-weight: 900;
}

/* Brand Icons */
.fab {
    font-family: 'Font Awesome 5 Brands';
    font-weight: 400;
}

/* 音量图标 */
.fa-volume-up:before { content: "🔊"; }

/* 机器人图标 */
.fa-robot:before { content: "🤖"; }

/* 播放图标 */
.fa-play:before { content: "▶"; }

/* 图表图标 */
.fa-chart-bar:before { content: "📊"; }

/* 闪电图标 */
.fa-bolt:before { content: "⚡"; }

/* 搜索图标 */
.fa-search:before { content: "🔍"; }

/* 云图标 */
.fa-cloud:before { content: "☁"; }

/* 火图标 */
.fa-fire:before { content: "🔥"; }

/* 检查图标 */
.fa-check:before { content: "✓"; }

/* 信封图标 */
.fa-envelope:before { content: "✉"; }

/* 电话图标 */
.fa-phone:before { content: "📞"; }

/* 微信图标 */
.fa-weixin:before { content: "💬"; }

/* 微博图标 */
.fa-weibo:before { content: "📱"; }

/* GitHub图标 */
.fa-github:before { content: "💻"; }

/* 腾讯图标 */
.fa-tencent:before { content: "🐧"; }

/* 微软图标 */
.fa-microsoft:before { content: "🪟"; }

/* 响应式设计 */
@media (max-width: 768px) {
    .fas, .fab {
        font-size: 1.2em;
    }
}