expand 图标

arrow-rotate-left arrow-rotate-left-10 arrow-rotate-left-15 arrow-rotate-left-30 arrow-rotate-right arrow-rotate-right-10 arrow-rotate-right-15 arrow-rotate-right-30 arrows-maximize arrows-repeat arrows-repeat-1 arrows-rotate arrows-rotate-reverse backward backward-fast backward-step circle-pause circle-play circle-stop compress compress-wide down-left-and-up-right-to-center eject expand-wide forward forward-fast forward-step hand maximize minimize music pause phone-volume picture-in-picture play play-flip play-pause plus-minus remote repeat repeat-1 rotate rotate-left rotate-reverse rotate-right rss scrubber shuffle slider slider-circle sliders sliders-up stop subtitles subtitles-slash up-right-and-down-left-from-center volume volume-high volume-low volume-off volume-slash volume-xmark