:root{--ink:#0b1220;--muted:#64748b;--paper:#f7faff;--surface:#ffffff;--line:#d8e5f2;--blue:#2563eb;--sky:#38bdf8;--teal:#14b8a6;--navy:#0b1220;--shadow:0 22px 60px rgba(37,99,235,.10)}*{box-sizing:border-box}body{margin:0;min-height:100vh;color:var(--ink);background:var(--paper);font-family:Inter,"SF Pro Display","Segoe UI","Microsoft YaHei",Arial,sans-serif;letter-spacing:0}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit;letter-spacing:0}.hidden{display:none!important}.portal-shell{min-height:100vh;display:grid;grid-template-columns:288px 1fr}.portal-side{position:sticky;top:0;height:100vh;display:flex;flex-direction:column;gap:28px;padding:26px 22px;color:var(--ink);background:rgba(255,255,255,.92);border-right:1px solid var(--line);box-shadow:8px 0 30px rgba(37,99,235,.05)}.brand{display:inline-flex;align-items:center;gap:12px}.mark{width:38px;height:38px;border-radius:12px;background:linear-gradient(135deg,rgba(255,255,255,.94),rgba(255,255,255,0) 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