Can this case support larger graphics cards, and if so, what is the maximum GPU length it can accommodate?

Yes, the case can support larger graphics cards with a maximum length of 417mm.

Questions & Answers: Gaming PC Case E-ATX Desktop Computer Case with Tempered Glass Side Panel/ Support 360mm Water Cooling / 5 Hard Drive Bits / 10 Fan Positions - White

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Gaming PC Case E-ATX Desktop Computer Case with Tempered Glass Side Panel/ Support 360mm Water Cooling / 5 Hard Drive Bits / 10 Fan Positions - White

Motherboard expert can install: Chassis motherboard supports E-ATX, ATX, Micro-ATX, Mini-ltx
Compatible with most commercially available graphics cards: The length of the graphics card in the chassis is limited to 417mm and supports horizontal and vertical graphics card insertion.
Disk expert: Three 3.5" hard disks and two 2.5" hard disks can be installed in the case
Efficient heat dissipation 10 Fan slots: The chassis supports 10 fans for strong heat dissipation
Fan support: (Fans not included)
Front: 140mmX3/120mmX3Power Storage :120mmx3
Top :140mmX2/120mm x3 Rear :120mm x1
Water cooling support:
Front :280/360mm Top :280/360mm Rear :120mm
Height limit for CPU heat sinks 160mm: The chassis is compatible with most commercially available CPU heat sinks, meeting your heat dissipation requirements.