:root{--d-bg-0: #070b18;--d-bg-1: #0c1330;--d-bg-2: #121a3c;--d-line: rgba(148, 170, 255, .16);--d-text: #e8ecff;--d-text-dim: #9aa4cc;--d-accent: #7c93ff;--d-accent-soft: rgba(124, 147, 255, .14);--d-learn: #49c8b3;--d-project: #e0a34c;--d-danger: #e2737a}#d-shell{position:fixed;inset:0;z-index:9990;display:grid;grid-template-rows:56px 1fr;background:radial-gradient(1200px 800px at 78% -10%,rgba(60,84,200,.18),transparent 60%),radial-gradient(900px 700px at 12% 110%,rgba(30,58,160,.16),transparent 55%),var(--d-bg-0);color:var(--d-text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Microsoft YaHei,sans-serif}#d-shell[hidden]{display:none}.d-topbar{display:flex;align-items:center;gap:14px;padding:0 14px;border-bottom:1px solid var(--d-line);background:#070b18e6;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.d-close{border:1px solid var(--d-line);background:var(--d-bg-2);color:var(--d-text);padding:7px 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