:root{--bg-deep: #060a12;--panel: rgba(20, 30, 51, .82);--panel-border: rgba(74, 112, 186, .26);--text: #e8eefc;--muted: #8ba0c6;--accent: #3d8bff;--warn: #ff9f43;--danger: #ff5c5c;--success: #34d399}html,body,#root{width:100%;height:100%;overflow:hidden}body{font-family:-apple-system,PingFang SC,Microsoft YaHei,Source Han Sans SC,sans-serif;color:var(--text);background:var(--bg-deep)}.viewport{position:fixed;top:0;right:0;bottom:0;left:0;width:100%;height:100%;overflow:hidden;background:radial-gradient(circle at 20% 0%,rgba(61,139,255,.16),transparent 55%),radial-gradient(circle at 85% 100%,rgba(123,92,255,.14),transparent 50%),var(--bg-deep)}.stage{position:absolute;left:50%;top:50%;width:1920px;height:1080px;transform-origin:center center;overflow:hidden}.board{display:flex;flex-direction:column;width:100%;height:100%;padding:24px 32px 12px}.status-bar{position:relative;display:flex;align-items:center;justify-content:space-between;padding:0 6px 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