/* 升级提示独立于应用样式，IE 不支持 CSS 变量或现代布局时也能阅读。 */
#browser-support-warning {
    display: none;
    position: fixed;
    z-index: 99999;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    overflow: auto;
    padding: 64px 24px;
    box-sizing: border-box;
    background: #111d2c;
    color: #dce8f8;
    font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
    text-align: center;
    line-height: 1.8;
}
#browser-support-warning .browser-support-content { max-width: 640px; margin: 8vh auto 0; }
#browser-support-warning .browser-support-brand { color: #9babbe; font-size: 14px; letter-spacing: 2px; }
#browser-support-warning .browser-support-icon { width: 56px; margin: 30px auto 20px; border: 1px solid #f0bf72; border-radius: 50%; color: #f0bf72; font-size: 30px; line-height: 56px; }
#browser-support-warning h1 { margin: 0 0 20px; font-size: 26px; }
#browser-support-warning p { margin: 16px 0; }
#browser-support-warning .browser-support-note { color: #9babbe; font-size: 13px; }
#browser-support-warning a { display: inline-block; margin: 8px; padding: 9px 20px; border: 1px solid #34506d; border-radius: 6px; color: #9dc0ff; text-decoration: none; }
#browser-support-warning a:hover, #browser-support-warning a:focus { border-color: #9dc0ff; background: #192a3f; }
@media (max-width: 480px) {
    #browser-support-warning { padding: 28px 20px; }
    #browser-support-warning .browser-support-content { margin-top: 0; }
    #browser-support-warning h1 { font-size: 23px; }
}