:root{--primary: #1d4ed8;--primary-dark: #1e40af;--bg: #f5f7fb;--card: #ffffff;--text: #111827;--muted: #6b7280;--border: #e5e7eb;--danger: #dc2626;--success: #059669}*{margin:0;padding:0;box-sizing:border-box}html,body{background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Microsoft YaHei,sans-serif}a{color:inherit;text-decoration:none}button{font:inherit;border:none;background:none;cursor:pointer}input,textarea,select{font:inherit;width:100%;border:1px solid var(--border);border-radius:8px;padding:11px 12px;outline:none;background:#fff}input:focus,textarea:focus{border-color:var(--primary)}.page{min-height:100vh;max-width:520px;margin:0 auto;padding:20px 16px 32px}.card{background:var(--card);border:1px solid var(--border);border-radius:10px;padding:18px}.btn{display:inline-flex;align-items:center;justify-content:center;width:100%;height:46px;border-radius:8px;background:var(--primary);color:#fff;font-size:16px;font-weight:600}.btn:active{background:var(--primary-dark)}.btn.secondary{background:#eef2ff;color:var(--primary)}.btn.danger{background:var(--danger)}.btn:disabled{opacity:.6}.field{margin-bottom:14px}.field label{display:block;font-size:14px;margin-bottom:6px;color:#374151}.muted{color:var(--muted);font-size:13px}.title{font-size:24px;font-weight:800;margin-bottom:6px}.subtitle{color:var(--muted);font-size:14px;margin-bottom:20px}.notice{background:#eff6ff;border:1px solid #bfdbfe;color:#1e40af;border-radius:8px;padding:12px;font-size:13px;margin-bottom:16px}