:root{--bg-main: #f4f1e8;--bg-soft: #e6ece7;--surface: rgba(255, 252, 245, .92);--surface-strong: #fffef8;--line: #d3d0c5;--line-strong: #b9b5a5;--text: #1f2f2a;--muted: #5b6d66;--accent: #0f7c72;--accent-2: #c37f2d;--danger: #b03d30}*{box-sizing:border-box}body{margin:0;color:var(--text);background:radial-gradient(circle at 16% 8%,rgba(201,228,221,.5) 0%,transparent 36%),radial-gradient(circle at 85% 2%,rgba(242,205,155,.4) 0%,transparent 40%),linear-gradient(125deg,var(--bg-main),var(--bg-soft));font-family:"Source Han Serif SC",Songti SC,"Noto Serif SC",serif}.app-shell-v2{min-height:100vh;display:grid;grid-template-columns:276px 1fr}.side-nav{border-right:1px solid var(--line);background:#fef9eec7;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);padding:18px 14px;display:grid;grid-template-rows:auto 1fr;gap:16px}.brand-panel{border:1px solid 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