Your firm has been engaged by Company A, a growth tech company that's planning a significant capital expenditure to expand its market share. Company A is currently rated BB-, making it sub-investment grade and unable to access investment-grade financing. They want to raise $500 million through a high-yield bond issuance. As the lead underwriter, walk me through how you would structure this deal. What are your key considerations, critical structural terms, potential risks, and how would you market this offering to investors?

你所在的投行被一家成长型科技公司A公司聘请，该公司计划进行一项大规模的资本支出，以扩大其市场份额。A公司目前的信用评级为BB-，无法获得投资级融资，因此希望通过发行高收益债券来筹集5亿美元资金。作为此次发行的主承销商团队负责人，你将如何为A公司设计此次高收益债券发行方案？请阐述你的主要考虑因素、关键结构条款、潜在风险，以及你将如何向投资者推介。