:root{--brand: #2f90ea;--brand-dark: #1f6fc0;--bg: #f5f7fa;--card: #ffffff;--text: #1f2329;--text-light: #646a73;--border: #e5e6eb;--error: #f53f3f;--ok: #00b42a}*{box-sizing:border-box}html,body,#app{height:100%;margin:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif;background:var(--bg);color:var(--text);font-size:14px}a{color:var(--brand);text-decoration:none}.card{background:var(--card);border-radius:12px;box-shadow:0 4px 20px #0000000f}.btn{display:inline-flex;align-items:center;justify-content:center;height:40px;padding:0 20px;border:none;border-radius:8px;font-size:14px;cursor:pointer;transition:opacity .15s,background .15s}.btn:disabled{opacity:.6;cursor:not-allowed}.btn-primary{background:var(--brand);color:#fff}.btn-primary:hover:not(:disabled){background:var(--brand-dark)}.btn-wx{background:#07c160;color:#fff}.btn-wx:hover:not(:disabled){background:#06a551}.btn-ghost{background:transparent;color:var(--text-light);border:1px solid var(--border)}.field{display:flex;flex-direction:column;gap:6px}.field label{font-size:13px;color:var(--text-light)}.input{height:40px;padding:0 12px;border:1px solid var(--border);border-radius:8px;font-size:14px;outline:none;transition:border-color .15s}.input:focus{border-color:var(--brand)}.alert{padding:10px 14px;border-radius:8px;font-size:13px}.alert-error{background:#ffece8;color:var(--error)}.alert-info{background:#e8f3ff;color:var(--brand-dark)}.alert-ok{background:#e8ffea;color:var(--ok)}