*{box-sizing:border-box}:root{--primary:#1e5eff;--text:#111;--muted:#6b7280;--border:#e5e7eb;--bg:#ffffff;--pagebg:#eaeaea;--soft:#f5f7ff}body{margin:0;font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background:var(--pagebg);color:var(--text)}.app{max-width:420px;min-height:100vh;margin:0 auto;background:var(--bg);display:flex;flex-direction:column}.page{padding:20px}.topbar{height:56px;display:flex;align-items:center;gap:12px}.backBtn{font-size:22px;cursor:pointer;-webkit-user-select:none;user-select:none}.title{font-size:18px;font-weight:700;margin:0}.card{border:1px solid var(--border);border-radius:12px;padding:16px;background:#fff}.link{color:var(--primary);cursor:pointer;font-size:13px;font-weight:600;text-decoration:none}.center{display:flex;justify-content:center;align-items:center}.full{width:100%}