:root{--bg:#f6f7f9;--panel:#fff;--line:#e5e7eb;--text:#111827;--muted:#6b7280;--brand:#111827;--accent:#2563eb}
*{box-sizing:border-box}body{margin:0;font-family:Arial,"Microsoft YaHei",sans-serif;background:var(--bg);color:var(--text)}a{text-decoration:none;color:inherit}img{max-width:100%;display:block}
.admin-layout{display:flex;height:100vh;overflow:hidden}.sidebar{width:250px;min-width:250px;background:#111827;color:#dbe3f0;position:fixed;left:0;top:0;bottom:0;padding:20px 14px;overflow-y:auto}.sidebar h2{margin:6px 10px 18px;font-size:22px}.menu a{display:block;padding:12px 14px;border-radius:12px;color:#dbe3f0;margin-bottom:6px}.menu a:hover,.menu a.active{background:#1f2937}.content{margin-left:250px;width:calc(100% - 250px);height:100vh;overflow:auto;padding:24px}.topbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}.card{background:var(--panel);border:1px solid var(--line);border-radius:18px;padding:18px;box-shadow:0 6px 18px rgba(17,24,39,.04)}.grid{display:grid;gap:18px}.grid.cols-4{grid-template-columns:repeat(4,1fr)}.stat{padding:20px}.stat h3{margin:0 0 10px;color:var(--muted);font-size:14px}.stat .num{font-size:34px;font-weight:700}
.table-wrap{overflow:auto;background:#fff;border:1px solid var(--line);border-radius:18px}.table{width:100%;border-collapse:collapse;min-width:980px}.table th,.table td{padding:14px;border-bottom:1px solid var(--line);vertical-align:top}.table th{background:#f9fafb;text-align:left;font-size:13px;color:#374151;position:sticky;top:0}.table .ops{position:sticky;right:0;background:#fff;white-space:nowrap}.btn{display:inline-block;background:#111827;color:#fff;padding:10px 14px;border-radius:10px;border:none;cursor:pointer}.btn.secondary{background:#fff;color:#111827;border:1px solid var(--line)}.btn.danger{background:#dc2626}.form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.field{display:flex;flex-direction:column;gap:8px}.field input,.field textarea,.field select{padding:11px 12px;border-radius:10px;border:1px solid var(--line);background:#fff}.field textarea{min-height:120px;resize:vertical}.full{grid-column:1/-1}.login-wrap{min-height:100vh;display:grid;place-items:center;padding:20px}.login-box{width:100%;max-width:420px;background:#fff;border:1px solid var(--line);border-radius:20px;padding:24px;box-shadow:0 12px 30px rgba(17,24,39,.06)}.hint{color:var(--muted);font-size:14px}.thumb{width:88px;height:68px;object-fit:cover;border-radius:10px}.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.mb16{margin-bottom:16px}.mb24{margin-bottom:24px}
@media (max-width:980px){.sidebar{width:220px;min-width:220px}.content{margin-left:220px;width:calc(100% - 220px)}.grid.cols-4{grid-template-columns:repeat(2,1fr)}.form-grid{grid-template-columns:1fr}}@media (max-width:700px){.admin-layout{display:block}.sidebar{position:relative;width:100%;min-width:100%;height:auto}.content{margin-left:0;width:100%;height:auto}.grid.cols-4{grid-template-columns:1fr}}