:root{--bg:#f7f7f7;--card:#fff;--primary:#2563eb;--primary-dark:#1d4ed8;--text:#0f172a;--muted:#475569}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:Noto Sans SC,PingFang SC,Helvetica Neue,Arial,sans-serif}a{color:inherit;text-decoration:none}main{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px}.card{width:100%;max-width:720px;background:var(--card);border-radius:16px;padding:32px;box-shadow:0 12px 48px rgba(0,0,0,.08)}h1{margin:0 0 12px;font-size:24px}p{margin:0 0 16px;color:var(--muted)}.form{display:flex;flex-direction:column;gap:16px;margin-top:16px}.label{font-weight:600;margin-bottom:6px}.file,.input{width:100%;padding:12px;border:1px solid #e2e8f0;border-radius:10px;font-size:14px;background:#f8fafc}.button{background:var(--primary);color:#fff;border:none;border-radius:12px;padding:14px 16px;font-size:15px;font-weight:700;cursor:pointer;transition:background .2s ease}.button:hover{background:var(--primary-dark)}.status{margin-top:12px;padding:12px;border-radius:10px;background:#eff6ff;color:#1d4ed8;border:1px solid #bfdbfe;font-size:14px;white-space:pre-line}.error{background:#fef2f2;color:#b91c1c;border:1px solid #fecdd3}