*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif}.app-header{background:#fff;border-bottom:1px solid #e8e8e8;position:sticky;top:0;z-index:100}.header-inner{max-width:1100px;margin:0 auto;padding:0 20px;height:56px;display:flex;align-items:center;justify-content:space-between}.header-left{display:flex;align-items:center;gap:24px}.logo-link{display:flex;align-items:center;gap:8px;text-decoration:none;color:inherit}.logo-icon{width:28px;height:28px;border-radius:6px}.logo-text{font-size:20px;font-weight:700;color:#1a6b8a}.nav-link{text-decoration:none;color:#555;font-size:14px;padding:4px 0;border-bottom:2px solid transparent;transition:all .2s}.nav-link:hover,.nav-link.router-link-active{color:#1a6b8a;border-bottom-color:#1a6b8a}.username{font-size:13px;color:#888}.theme-btn{font-size:16px}.app-content{max-width:1100px;margin:0 auto;width:100%;padding:24px 20px;min-height:calc(100vh - 116px)}.app-footer{text-align:center;padding:20px;font-size:13px;color:#aaa;border-top:1px solid #eee;background:#fff}@media(max-width:768px){.header-inner{padding:0 12px}.app-content{padding:16px 12px}.header-left{gap:16px}.logo-text{font-size:18px}}