@charset "UTF-8";
/*
 * トピックス記事下部の関連記事エリア
 */

/* ===== エリア全体 ===== */
.erp-f {
  width: 100%;
  max-width: 960px;
  margin: 0 auto;
  padding: 56px 20px 64px;
  display: flex;
  flex-direction: column;
  gap: 56px;
  box-sizing: border-box;
}

.erp-f * {
  box-sizing: border-box;
}

.erp-f a {
  color: inherit;
  text-decoration: none;
}

/* ===== 見出し ===== */
.erp-f-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 16px;
  border-bottom: 1px solid #d9d9d9;
  padding-bottom: 12px;
  margin-bottom: 20px;
}

.erp-f .erp-f-head h2 {
  margin: 0;
  font-size: 30px;
  font-weight: 600;
  letter-spacing: .02em;
}

.erp-f-sub {
  font-size: 13px;
  color: #6b6b6b;
}

.erp-f .erp-f-more {
  margin-left: auto;
  padding: 0;
  background: none;
  font-size: 13px;
  color: #444;
  border: 0;
  border-bottom: 1px solid #8a8a8a;
  letter-spacing: .04em;
}

.erp-f .erp-f-more:hover {
  color: #000;
  border-bottom-color: #000;
}

/* ===== タグ（products / Topics / News） ===== */
.erp-f-tag {
  display: inline-block;
  padding: 2px 10px;
  border: 1px solid #9a9a9a;
  font-size: 13px;
  color: #555;
  line-height: 1.5;
}

/* ===== サムネイル枠 ===== */
.erp-f-th {
  display: block;
  background: #efefef;
  overflow: hidden;
  position: relative;
}

.erp-f .erp-f-th img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  max-width: none;
  object-fit: cover;
  display: block;
  opacity: 1;
  visibility: visible;
  transition: transform .4s;
}

.erp-f a:hover .erp-f-th img {
  transform: scale(1.04);
}

.erp-f-noimg {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  color: #a0a0a0;
}

/* ===== 上段：Featured in this article（製品・施工事例） ===== */
.erp-f-featured {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.erp-f-card {
  display: flex;
  gap: 20px;
  padding: 16px;
  border: 1px solid #e3e3e3;
  align-items: center;
  transition: border-color .2s;
}

.erp-f-card:hover {
  border-color: #9a9a9a;
}

.erp-f-card .erp-f-th {
  flex: 0 0 180px;
  height: 135px;
}

.erp-f-body {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-width: 0;
}

.erp-f-body .erp-f-tag {
  align-self: flex-start;
}

.erp-f-title {
  font-size: 16px;
  font-weight: 500;
  line-height: 1.6;
  overflow-wrap: anywhere;
}

.erp-f-cta {
  font-size: 12px;
  color: #6b6b6b;
}

/* ===== 下段：Blog（サムネ付きカード 4列） ===== */
.erp-f-topics {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 24px;
}

.erp-f-topic {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.erp-f-topic .erp-f-th {
  aspect-ratio: 4/3;
}

.erp-f-meta {
  display: flex;
  gap: 8px;
  align-items: center;
}

.erp-f-date {
  font-size: 12px;
  color: #6b6b6b;
}

.erp-f-topic .erp-f-title {
  font-size: 14px;
  font-weight: 400;
  line-height: 1.7;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
  overflow: hidden;
}

/* ===== スマホ用「View more」ボタン（PCでは非表示） ===== */
.erp-f-btn {
  display: none;
}

/* ===== 下段：News（サムネなしの一覧） ===== */
.erp-f-news {
  list-style: none;
  margin: -20px 0 0;
  padding: 0;
}

.erp-f-news li {
  margin: 0;
  padding: 0;
  border-bottom: 1px solid #e3e3e3;
}

.erp-f-news a {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 18px 4px;
  transition: background .2s;
}

.erp-f-news a:hover {
  background: rgba(0, 0, 0, .03);
}

.erp-f-news .erp-f-date {
  flex: 0 0 auto;
  width: 84px;
}

.erp-f-news .erp-f-tag {
  flex: 0 0 auto;
}

.erp-f-news .erp-f-title {
  font-size: 15px;
  font-weight: 400;
  line-height: 1.6;
  min-width: 0;
}

/* ===== スマホ（767px以下） ===== */
@media (max-width:767px) {
  .erp-f {
    padding: 40px 16px 48px;
    gap: 44px;
  }

  .erp-f-head {
    flex-direction: column;
    gap: 4px;
  }

  .erp-f .erp-f-head h2 {
    font-size: 26px;
  }

  .erp-f-more {
    display: none;
  }

  .erp-f-featured {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .erp-f-card {
    padding: 12px;
    gap: 14px;
  }

  .erp-f-card .erp-f-th {
    flex-basis: 112px;
    height: 84px;
  }

  .erp-f-card .erp-f-title {
    font-size: 14px;
  }

  .erp-f-topics {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px 14px;
  }

  .erp-f-topic .erp-f-tag {
    display: none;
  }

  /* 製品・施工事例ページは種類が混ざるので、スマホでもタグを出す */
  .erp-f-topics--mixed .erp-f-topic .erp-f-tag {
    display: inline-block;
  }

  .erp-f-news a {
    flex-wrap: wrap;
    gap: 6px 12px;
    padding: 14px 0;
  }

  .erp-f-news .erp-f-date {
    width: auto;
  }

  .erp-f-news .erp-f-title {
    flex: 1 1 100%;
    font-size: 14px;
  }

  .erp-f-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 48px;
    margin-top: 16px;
    border: 1px solid #8a8a8a;
    font-size: 13px;
    color: #444;
  }
}