.study-list {
width: 100%;
max-width: 1050px;
color: #333;
font-size: 13px;
line-height: 1.55;
}

/* カテゴリナビゲーション */
.study-nav {
  margin: 0 0 28px;
}

.study-nav-title {
  margin: 0 0 10px;
  color: #333333;
  font-size: 14px;
  font-weight: bold;
}

.study-nav-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  column-gap: 20px;
  row-gap: 4px;
}

.study-nav-list a {
  display: block;
  padding: 3px 0;
  color: #0056b3;
  font-size: 13px;
  line-height: 1.6;
  text-decoration: none;
}

.study-nav-list a:hover {
  color: #003f7d;
  text-decoration: underline;
}


/* カテゴリ全体 */
.study-grid {
display: grid;
grid-template-columns: repeat(2, minmax(0, 1fr));
gap: 20px 24px;
align-items: start;
}

.study-category {
min-width: 0;
}

/* 製品数が多いカテゴリは全幅 */
.study-category.wide {
grid-column: 1 / -1;
}

.study-category h2 {
margin: 10px 0 7px;
padding: 0 0 0 10px;
border-left: 4px solid #0056b3;
border-bottom: 1px solid #d9dee5;
font-size: 15px;
font-weight: 600;
}

.study-items {
display: grid;
grid-template-columns: minmax(0, 1fr);
gap: 0;
margin: 0;
padding: 0;
list-style: none;
}

/* 全幅カテゴリ内の製品を2列に */
.study-category.wide .study-items {
grid-template-columns: repeat(2, minmax(0, 1fr));
column-gap: 22px;
}

.study-items li {
min-width: 0;
padding: 5px 7px;
border-bottom: 1px solid #e9edf2;
}

.study-items li:hover {
background: #eef4f8;
}

.study-items a {
text-decoration: none;
}

.study-items a:hover {
text-decoration: underline;
}

.study-name {
display: inline;
}

.study-mcu {
display: inline;
margin-left: 7px;
color: #666;
font-size: 11px;
}

.study-note {
display: inline-block;
margin-left: 7px;
color: #666;
font-size: 11px;
}

.study-subtitle {
margin: 10px 0 4px;
color: #666;
font-size: 12px;
font-weight: 600;
}

/* 分類グループ共通 */
.study-group {
  margin-top: 14px;
}

.study-group h3 {
  margin: 0 0 5px;
  padding: 3px 7px;
  background-color:#f8f9fb;
  color: #555;
  font-size: 13px;
  font-weight: 600;
}

/* グループ内の製品一覧 */
.study-group .study-items {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  column-gap: 22px;
  row-gap: 0;
}

.study-group .study-items li {
  min-width: 0;
  padding: 5px 7px;
  border-bottom: 1px solid #e9edf2;
}

.study-group .study-items li:hover {
  background: #eef4f8;
}

/* シリーズ総合案内 */
.study-series {
padding: 9px 5px 0 7px;
}

.study-series-label {
color: #666;
font-size: 11px;
}

.study-series a {
 font-size: 13px;
}

.product-label {
display: inline-block;
margin-left: 6px;
padding: 2px 6px;

color: #666666;
background: #f1f4f7;
border: 1px solid #cbd4df;
border-radius: 3px;

font-size: 11px;
line-height: 1.4;
text-decoration: none;
vertical-align: middle;
white-space: nowrap;
}

.product-label:hover {
color: #003f7d;
background: #f5f7fa;
}