:root{--brand-red: #c02c38;--brand-red-dark: #9a1f2b}html,body,#app{height:100%;margin:0}.placeholder{height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;font-family:PingFang SC,Microsoft YaHei,sans-serif;color:var(--brand-red-dark)}.placeholder h1{margin:0;color:var(--brand-red);letter-spacing:6px}