:root{--bg:#F5F7FB;--text:#0B2347;--muted:#6B7A90;--card:#FFFFFF;--chip:#EDF2FF;--primary:#1D4ED8;--shadow:0 12px 28px rgba(16,24,40,.08);--radius:16px}*{box-sizing:border-box}html,body,#root{height:100%}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial;color:var(--text);background:var(--bg)}.navbar{position:sticky;top:0;z-index:10;height:56px;display:flex;align-items:center;justify-content:center;background:#fff;box-shadow:0 1px #0000000a}.navbar-inner{position:relative;width:100%;max-width:780px;padding:0 12px;display:flex;align-items:center;justify-content:center}.nav-title{font-size:17px;font-weight:600}.nav-left{position:absolute;left:12px;display:flex;align-items:center;gap:4px}.nav-back{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:18px;background:#f2f4f7;cursor:pointer;-webkit-user-select:none;user-select:none}.page{max-width:780px;margin:0 auto;padding:16px 16px 28px}.card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow)}.btn-primary{height:56px;border:none;outline:none;border-radius:14px;background:var(--primary);color:#fff;font-size:18px;font-weight:800;width:100%;cursor:pointer}.btn-primary:disabled{opacity:.5;cursor:not-allowed}.chip{display:inline-flex;align-items:center;border:none;cursor:pointer;padding:8px 12px;height:36px;border-radius:18px;background:var(--chip);color:#1e3a8a;font-weight:700}