/* CTIcon - 图标工具类 */
.ct-icon {
    display: inline-flex;
    vertical-align: middle;
    flex-shrink: 0;
}

/* 尺寸修饰类 */
.ct-icon-xs { width: 12px; height: 12px; }
.ct-icon-sm { width: 14px; height: 14px; }
.ct-icon-md { width: 16px; height: 16px; }
.ct-icon-lg { width: 20px; height: 20px; }
.ct-icon-xl { width: 24px; height: 24px; }

/* 间距工具类 */
.ct-icon-left  { margin-right: 4px; }
.ct-icon-right { margin-left: 4px; }

/* 按钮内图标对齐 */
button .ct-icon,
.btn .ct-icon,
a .ct-icon {
    vertical-align: -0.15em;
}