简约风黑白灰盾牌图案剑城堡十字架斧头文字插画

minimalist icon design, dark gray color scheme, monochromatic design, main objects include nine icons related to castles and knights, decorative elements such as shields, swords, castles, helmets, white background, no additional processing, text content includes 'CASTLE', 'DEFENDER', 'KNIGHTS', 'KNIGHT', 'CASTLE GUARD', 'WARRIOR', 'GUARD', 'IRON KNIGHT', 'CRUSADER', modern font style, dark gray text, medium size, evenly distributed below icons, overall visual effect is simple and clear, conveys the theme of medieval knights and castles, gives a solemn and historical impression