* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Arial, "Microsoft YaHei", sans-serif;
  background: #f5f7fb;
  color: #202938;
}
.topbar {
  background: #fff;
  border-bottom: 1px solid #e7eaf0;
  padding: 20px 5%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
}
.topbar h1 { margin: 0 0 6px; font-size: 26px; }
.topbar p { margin: 0; color: #7a8494; }
.admin-link {
  text-decoration: none;
  color: #fff;
  background: #2f6fed;
  padding: 10px 16px;
  border-radius: 9px;
}
.container { max-width: 1200px; margin: 30px auto; padding: 0 20px; }
.toolbar { display:flex; gap:12px; align-items:center; margin-bottom:20px; }
input, textarea {
  width: 100%;
  border: 1px solid #dfe4ec;
  border-radius: 9px;
  padding: 12px 14px;
  font-size: 15px;
  margin: 8px 0;
  outline: none;
}
input:focus, textarea:focus { border-color: #2f6fed; }
.toolbar input { margin: 0; max-width: 520px; }
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 18px;
}
.card, .panel {
  background: #fff;
  border: 1px solid #e7eaf0;
  border-radius: 14px;
  padding: 18px;
  box-shadow: 0 4px 18px rgba(20,30,50,.04);
}
.card img {
  width: 100%;
  max-height: 300px;
  object-fit: contain;
  border-radius: 10px;
  background: #f3f5f8;
  margin-bottom: 14px;
}
.card h3 { margin: 0 0 10px; }
.card-text {
  white-space: pre-wrap;
  background: #f7f8fa;
  border-radius: 9px;
  padding: 12px;
  line-height: 1.6;
  min-height: 60px;
}
button {
  border: 0;
  border-radius: 9px;
  padding: 10px 15px;
  cursor: pointer;
  font-size: 14px;
}
.primary { background: #2f6fed; color: white; }
.secondary { background: #eef1f6; color: #344054; }
.danger { background: #ffe9e9; color: #c62828; }
.actions { display:flex; gap:10px; margin-top:12px; }
.card-actions { display:flex; gap:8px; margin-top:12px; flex-wrap:wrap; }
.hint, .message { color:#7a8494; font-size:14px; }
.empty { text-align:center; padding:60px 20px; color:#8a94a6; }
.hidden { display:none !important; }
.panel { margin-bottom:20px; }
.panel h2 { margin-top:0; }
.panel-head { display:flex; justify-content:space-between; align-items:center; }
.upload {
  display:block;
  border:1px dashed #bfc7d4;
  border-radius:10px;
  padding:14px;
  margin-top:10px;
  cursor:pointer;
}
.upload input { margin:8px 0 0; }
.preview img { max-width:280px; max-height:220px; border-radius:10px; margin-top:12px; }
.admin-item {
  display:flex;
  gap:15px;
  padding:15px 0;
  border-bottom:1px solid #edf0f4;
}
.admin-item:last-child { border-bottom:0; }
.admin-item img { width:100px; height:80px; object-fit:cover; border-radius:8px; background:#f3f5f8; }
.admin-item-info { flex:1; }
.admin-item-info h3 { margin:0 0 6px; }
@media (max-width: 600px) {
  .topbar { padding:16px; }
  .topbar h1 { font-size:21px; }
  .container { margin-top:20px; padding:0 12px; }
  .admin-item { flex-direction:column; }
}