:root {
  --blue: #1f5eff;
  --blue2: #0f2b66;
  --bg: #f5f7fb;
  --card: #ffffff;
  --text: #172033;
  --muted: #6d7890;
  --line: #e7ecf5;
  --green: #0f9f6e;
  --yellow: #b7791f;
  --red: #d64545;
  --shadow: 0 18px 50px rgba(20, 43, 80, 0.08);
}
* { box-sizing: border-box; }
body { margin: 0; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif; color: var(--text); background: var(--bg); }
.hidden { display: none !important; }
button, input, select, textarea { font-family: inherit; }
button { border: 0; background: #edf2ff; color: #153774; border-radius: 12px; padding: 10px 14px; cursor: pointer; font-weight: 650; transition: .15s; }
button:hover { transform: translateY(-1px); filter: brightness(.98); }
button.primary { background: var(--blue); color: white; }
button.danger { background: #ffecec; color: var(--red); }
button.ghost { background: transparent; color: #7c89a2; }
button.icon { background: #f2f4f8; border-radius: 50%; width: 36px; height: 36px; padding: 0; font-size: 24px; line-height: 36px; }
input, select, textarea { width: 100%; border: 1px solid var(--line); background: #fff; border-radius: 12px; padding: 11px 12px; outline: none; font-size: 14px; }
textarea { min-height: 110px; resize: vertical; }
label { display: block; font-size: 13px; color: var(--muted); margin: 10px 0 6px; font-weight: 600; }

.login-wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center; background: radial-gradient(circle at 20% 10%, #dfeaff, transparent 28%), linear-gradient(135deg, #f7fbff, #eef3ff); }
.login-card { width: 430px; background: rgba(255,255,255,.9); border: 1px solid rgba(255,255,255,.7); box-shadow: var(--shadow); padding: 38px; border-radius: 28px; text-align: center; }
.brand-mark, .logo-box { background: linear-gradient(135deg, var(--blue), #64a6ff); color: #fff; font-weight: 900; letter-spacing: -.5px; display:flex; align-items:center; justify-content:center; }
.brand-mark { width: 72px; height: 72px; border-radius: 22px; margin: 0 auto 18px; font-size: 26px; }
.login-card h1 { margin: 0; font-size: 24px; }
.login-card p { color: var(--muted); margin: 10px 0 22px; }
.login-card input { margin-bottom: 12px; }
.login-card button { width: 100%; margin-top: 6px; background: var(--blue); color: #fff; padding: 13px; }
.tip { font-size: 12px; color: var(--muted); margin-top: 16px; }

.app { display: grid; grid-template-columns: 260px 1fr; min-height: 100vh; }
.sidebar { background: #fff; border-right: 1px solid var(--line); padding: 22px 16px; display: flex; flex-direction: column; position: sticky; top: 0; height: 100vh; }
.logo { display: flex; align-items: center; gap: 12px; margin-bottom: 22px; padding: 0 6px; }
.logo-box { width: 42px; height: 42px; border-radius: 14px; }
.logo strong { display:block; font-size: 17px; }
.logo span { display:block; font-size: 12px; color: var(--muted); margin-top: 2px; }
nav { display: flex; flex-direction: column; gap: 7px; }
.nav { text-align: left; background: transparent; color: #566179; border-radius: 14px; padding: 12px 14px; }
.nav.active, .nav:hover { background: #eef4ff; color: var(--blue2); }
.sidebar-foot { margin-top: auto; }
.main { padding: 28px; overflow: auto; }
.topbar { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 22px; gap: 20px; }
.topbar h2 { margin: 0; font-size: 26px; }
.topbar p { margin: 7px 0 0; color: var(--muted); }
.top-actions { display: flex; gap: 10px; }

.grid { display:grid; gap: 16px; }
.grid.cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid.cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid.cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 22px; box-shadow: var(--shadow); padding: 20px; }
.card h3 { margin: 0 0 14px; font-size: 17px; }
.stat { background: linear-gradient(180deg, #fff, #f8fbff); border: 1px solid var(--line); border-radius: 20px; padding: 18px; }
.stat b { font-size: 30px; display: block; margin-bottom: 5px; }
.stat span { color: var(--muted); font-size: 13px; }
.table { width: 100%; border-collapse: collapse; }
.table th, .table td { text-align: left; padding: 12px 10px; border-bottom: 1px solid var(--line); vertical-align: top; font-size: 14px; }
.table th { color: var(--muted); font-size: 12px; font-weight: 750; }
.badge { display:inline-flex; align-items:center; padding: 4px 8px; border-radius: 999px; font-size: 12px; font-weight: 750; background:#edf2ff; color:#244a96; }
.badge.low { background:#eafaf4; color:var(--green); }
.badge.medium { background:#fff6db; color:var(--yellow); }
.badge.high { background:#ffe6e6; color:var(--red); }
.badge.active { background:#eafaf4; color:var(--green); }
.badge.inactive { background:#f1f1f1; color:#777; }
.chip { display:inline-flex; align-items:center; max-width:100%; padding: 5px 9px; border-radius: 999px; background:#f1f5ff; color:#244a96; font-size:12px; font-weight:650; margin: 0 6px 6px 0; overflow-wrap:anywhere; }
.row-actions { display:flex; gap: 8px; flex-wrap: wrap; }
.form-grid { display:grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 10px 16px; }
.form-grid .full { grid-column: 1 / -1; }
.check-row { display:flex; align-items:center; gap: 8px; color: var(--text); margin: 8px 0 10px; }
.check-row input { width:auto; }
.toolbar { display:flex; justify-content: space-between; align-items:center; gap: 12px; margin-bottom: 14px; }
.toolbar-left, .toolbar-right { display:flex; gap: 10px; flex-wrap: wrap; }
pre { white-space: pre-wrap; background: #f7f9fd; border: 1px solid var(--line); border-radius: 14px; padding: 14px; font-size: 13px; line-height: 1.55; }
.preview-title { font-size: 22px; font-weight: 850; margin-bottom: 8px; }
.preview-tags { color: var(--blue); font-size: 13px; margin-bottom: 14px; }
.knowledge-list { display:grid; gap: 14px; }
.knowledge-card { border: 1px solid var(--line); border-radius: 18px; padding: 18px; background: #fff; }
.knowledge-head { display:flex; justify-content:space-between; gap: 16px; align-items:flex-start; margin-bottom: 14px; }
.knowledge-head h3 { margin:0 0 5px; }
.knowledge-head p { margin:0; color: var(--muted); font-size: 13px; }
.knowledge-grid { display:grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 10px 14px; }
.knowledge-field { border: 1px solid var(--line); border-radius: 14px; padding: 12px; background: #fbfcff; min-width:0; }
.knowledge-field > span { display:block; color: var(--muted); font-size: 12px; font-weight:750; margin-bottom: 7px; }
.reuse-strip { display:flex; flex-wrap:wrap; align-items:center; gap: 8px; margin-top: 14px; color: var(--muted); font-size: 12px; }
.reuse-strip b { color: var(--blue2); background:#edf2ff; border-radius:999px; padding:5px 8px; }
.source-stack { display:grid; gap: 10px; margin-bottom: 14px; }
.source-stack div, .source-snapshot div { border: 1px solid var(--line); border-radius: 14px; padding: 12px; background:#fbfcff; }
.source-stack b, .source-stack span, .source-snapshot b, .source-snapshot span, .source-snapshot em { display:block; }
.source-stack b, .source-snapshot b { color:var(--blue2); margin-bottom:4px; }
.source-stack span, .source-snapshot span, .source-snapshot em { color:var(--muted); font-size:13px; line-height:1.45; }
.source-snapshot { display:grid; gap: 10px; margin-bottom: 14px; }
.source-snapshot p { margin:0; color:var(--muted); line-height:1.55; }
.image-config { margin-top: 16px; border: 1px solid var(--line); border-radius: 18px; padding: 16px; background: #fbfcff; }
.image-config h3 { margin-bottom: 8px; }
.image-page { border: 1px solid var(--line); border-radius: 18px; padding: 18px; background: linear-gradient(135deg, #ffffff, #f2f6ff); margin-bottom: 12px; }
.image-page b { display:block; font-size: 18px; margin-bottom: 7px; }
.image-page span { color: var(--muted); display:block; margin-bottom: 10px; }
.image-page small { display:block; margin-top: 10px; color: var(--muted); font-weight: 650; }
.image-gen-summary, .metric-row { display:flex; gap: 8px; flex-wrap:wrap; margin-bottom: 12px; }
.image-gen-summary span, .metric-row span { background:#f4f7fc; border:1px solid var(--line); border-radius:999px; padding:6px 9px; color:var(--muted); font-size:12px; font-weight:650; }
.image-preview-grid { display:grid; grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: 14px; margin: 12px 0 18px; }
.generated-image { margin: 0; border:1px solid var(--line); border-radius: 8px; background:#fff; overflow:hidden; box-shadow: 0 12px 30px rgba(20, 36, 68, .08); }
.generated-image img { display:block; width:100%; aspect-ratio: 3 / 4; object-fit: cover; background:#f6f9ff; }
.generated-image figcaption { padding: 10px 12px; font-size: 12px; color: var(--muted); font-weight: 700; line-height: 1.45; }
.ai-setup-card p { line-height: 1.6; }
.ai-status-line { display:flex; gap: 8px; flex-wrap:wrap; align-items:center; margin: 12px 0 14px; }
.ai-status-line span:not(.badge) { background:#f4f7fc; border:1px solid var(--line); border-radius:999px; padding:6px 9px; color:var(--muted); font-size:12px; font-weight:650; max-width:100%; overflow-wrap:anywhere; }
.ai-advanced { margin-top: 12px; }
.prompt-box { border:1px solid var(--line); border-radius:14px; padding: 12px; margin-bottom:10px; background:#fff; }
.prompt-box summary { cursor:pointer; font-weight:750; color:var(--blue2); }
.strategy-grid { display:grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 14px; }
.strategy-card { border: 1px solid var(--line); border-radius: 18px; padding: 16px; background: linear-gradient(180deg, #fff, #fbfcff); }
.strategy-head { display:flex; justify-content:space-between; gap: 14px; align-items:flex-start; }
.strategy-head b, .strategy-head span { display:block; }
.strategy-head span { margin-top:4px; color:var(--blue); font-size:13px; font-weight:750; }
.strategy-head strong { font-size:28px; color:var(--blue2); }
.strategy-card p { color:var(--muted); line-height:1.55; }
.strategy-card ul { margin: 10px 0 0; padding-left: 18px; }
.strategy-card li { margin: 5px 0; }

.modal { position: fixed; inset: 0; background: rgba(18, 30, 52, .35); display: flex; align-items: center; justify-content: center; padding: 24px; z-index: 10; }
.modal-card { width: min(980px, 95vw); max-height: 90vh; overflow: hidden; background: #fff; border-radius: 24px; box-shadow: 0 30px 80px rgba(0,0,0,.2); display:flex; flex-direction: column; }
.modal-head { display:flex; align-items:center; justify-content:space-between; padding: 18px 22px; border-bottom: 1px solid var(--line); }
.modal-head h3 { margin:0; }
.modal-body { padding: 22px; overflow:auto; }
.toast { position: fixed; bottom: 28px; right: 28px; background: #172033; color: #fff; padding: 13px 16px; border-radius: 14px; box-shadow: var(--shadow); z-index: 20; }

@media (max-width: 960px) {
  .app { grid-template-columns: 1fr; }
  .sidebar { position: relative; height: auto; }
  nav { flex-direction: row; flex-wrap: wrap; }
  .main { padding: 18px; }
  .topbar { flex-direction: column; }
  .grid.cols-2, .grid.cols-3, .grid.cols-4, .form-grid, .knowledge-grid, .strategy-grid { grid-template-columns: 1fr; }
}