:root{--bg:#f7f8fa;--white:#fff;--border:#e5e7eb;--text:#111827;--text-muted:#6b7280;--primary:#1d9e75;--primary-light:#e1f5ee;--sidebar-w:220px;--topbar-h:56px;--bottom-nav-h:64px}*{box-sizing:border-box;margin:0;padding:0}html{font-size:16px}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background:var(--bg);color:var(--text)}a{text-decoration:none;color:inherit}.layout{display:flex;min-height:100vh}.sidebar{width:var(--sidebar-w);background:var(--white);border-right:1px solid var(--border);display:flex;flex-direction:column;position:fixed;top:0;left:0;bottom:0;z-index:100}.sidebar-logo{padding:18px 16px;font-size:17px;font-weight:700;color:var(--primary);border-bottom:1px solid var(--border);display:flex;align-items:center;gap:8px}.sidebar-nav{flex:1 1;padding:8px 0;overflow-y:auto}.nav-section{padding:10px 16px 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