/* ========================================
   Catalog Page Styles - Clean & Responsive
   ======================================== */

/* ========================================
   Layout Structure
   ======================================== */

.catalog-main-content {
  position: relative;
  min-height: 100vh;
}

.catalog-main-content > section {
  position: relative;
  z-index: 1;
}

/* PC版 margin-top: pages.css の .catalog-main-content > section:not(.page-header) で統一 */

.catalog-main-content > section:last-child {
  margin-bottom: var(--spacing-lg);
}

/* ========================================
   Page Header
   ======================================== */

.catalog-page-header,
.unified-background .page-header.catalog-page-header {
  position: relative;
  z-index: 2;
  margin-bottom: 0;
  background: url('../images/forms/catalog-header.webp');
  background-size: cover;
  background-position: center 75%;
  background-repeat: no-repeat;
}

.catalog-page-header .page-title {
  color: var(--color-white);
}

.catalog-page-header .page-subtitle {
  color: rgba(255, 255, 255, 0.8);
  font-weight: var(--font-weight-medium);
}

/* ========================================
   Content Sections
   ======================================== */

/* 他ページの .content-box と同じブロック間余白 */
.catalog-main-content .content-box {
  margin-bottom: var(--spacing-3xl);
  position: relative;
}

.catalog-main-content .content-box:last-child {
  margin-bottom: 0;
}

/* ========================================
   Catalog Categories - Removed (using content-box instead)
   ======================================== */

/* ========================================
   Catalog Items
   ======================================== */

.catalog-list {
  display: flex;
  flex-direction: column;
}

.catalog-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-xl) 0;
  border-bottom: 1px solid var(--color-gray-300);
  position: relative;
}

/* 低圧の先頭2項目の間は白線に変更 */
.catalog-main-content .content-box .catalog-item {
  border-bottom-color: var(--color-white);
}

.catalog-item:last-child {
  border-bottom: none;
}

/* モールド変圧器のcatalog-itemのborder-bottomを削除 */
.catalog-item:has(+ .spec-accordion),
.catalog-item:has(+ .spec-outline-block) {
  border-bottom: none;
}

/* 指定項目は白線を維持 */
/* 変圧器内の「項目ひとかたまり」境界線（中間に1本） */
.catalog-main-content .catalog-item.catalog-item-group {
  border-top: none;
  border-bottom: none;
}

.catalog-main-content .spec-accordion.spec-accordion-group {
  position: relative;
  padding-bottom: var(--spacing-lg);
  /* カタログPDF〜外形図PDF の間隔（PC／スマホ共通サイズ token） */
  margin-top: var(--spacing-sm);
}

.catalog-main-content .spec-accordion.spec-accordion-group::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: calc(var(--spacing-lg) / 4);
  border-bottom: 1px solid var(--color-white);
}

.catalog-main-content .spec-accordion.spec-accordion-group:last-of-type::after {
  display: none;
}

.catalog-info {
  flex: 1;
  margin-right: var(--spacing-lg);
  text-align: left !important;
}

.catalog-item-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-gray-900);
  margin-bottom: var(--spacing-sm);
  line-height: 1.4;
  text-align: left !important;
}

.catalog-item-desc {
  font-size: var(--font-size-base);
  color: var(--color-gray-600);
  line-height: 1.6;
  margin: 0;
  text-align: left !important;
}

.catalog-item .btn {
  flex-shrink: 0;
  min-width: 140px;
  white-space: nowrap;
  color: var(--color-white);
  border-color: var(--color-white);
  transition: transform 0.3s ease;
}

.catalog-item .btn:hover {
  transform: scale(1.05);
}

.catalog-item .btn.is-disabled {
  opacity: 0.55;
  cursor: not-allowed;
  pointer-events: none;
}

.catalog-item .btn.is-disabled:hover {
  transform: none;
}

/* ========================================
   Spec List / Accordion
   ======================================== */

.spec-list {
  margin-top: var(--spacing-2xl);
  padding-top: var(--spacing-xl);
  border-top: 1px solid var(--color-gray-300);
  text-align: left;
}

.spec-list-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  color: var(--color-gray-900);
  margin-bottom: var(--spacing-lg);
  text-align: left;
}

/* Accordion Styles (CSS Only) - SURGE FAQ Style */
.spec-accordion-checkbox {
  display: none;
}

.spec-accordion-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s cubic-bezier(0.22, 1, 0.36, 1);
}

.spec-accordion-checkbox:checked ~ .spec-accordion-content {
  max-height: 3000px;
}

.spec-accordion-checkbox:checked + .spec-accordion-header .spec-accordion-icon {
  transform: rotate(180deg);
}

/* 外形図PDFボタンはPDFダウンロードと同等の見た目 */
.catalog-main-content .spec-accordion {
  width: 100%;
  display: flex;
  flex-direction: column;
  /* 開閉パネルは行幅いっぱい。見出しボタンだけ右寄せ（align-self） */
  align-items: stretch;
  background: transparent;
}

.catalog-main-content .spec-accordion .spec-accordion-btn {
  display: inline-flex;
  align-items: center;
  align-self: flex-end;
  width: auto;
  min-width: 140px;
  padding: var(--spacing-sm) var(--spacing-xl);
  border-radius: var(--radius-none);
  background: transparent;
  border: 2px solid var(--color-white);
  color: var(--color-white);
  margin-left: auto;
  margin-right: 0;
  justify-content: center;
  gap: var(--spacing-sm);
  cursor: pointer;
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  line-height: var(--line-height-tight);
  white-space: nowrap;
  transition: transform 0.3s ease, color 0.3s ease;
}

.catalog-main-content .spec-accordion .spec-accordion-btn:hover {
  transform: scale(1.05);
}

/*
 * カタログPDF／仕様書アコーディオン見出しの枠幅を揃える
 * — 低圧・高圧・特別高圧・変圧器の各 .catalog-item 直下のボタンは同一幅
 * — 992px以上: 22rem（max 100%）、右寄せレイアウトは既存のまま
 * — 991px以下: 幅100%・align-self: stretch（縦積みで行幅いっぱい）
 * — 576px以下: .spec-accordion-group は幅100%（fit-content を上書き）
 */
.catalog-main-content .catalog-item > .btn,
.catalog-main-content .spec-accordion.spec-accordion-group .spec-accordion-btn:not(.spec-accordion-btn--nested) {
  width: 22rem;
  max-width: 100%;
  min-width: 0;
  box-sizing: border-box;
  text-align: center;
  justify-content: center;
  display: inline-flex;
  align-items: center;
}

.catalog-main-content .spec-accordion-checkbox:checked + .spec-accordion-btn {
  background: transparent;
  border-color: var(--color-white);
  color: var(--color-white);
}

.catalog-main-content .spec-accordion-btn .spec-accordion-title {
  color: var(--color-white);
  white-space: nowrap;
  text-align: center;
  font-size: inherit;
  font-weight: inherit;
  line-height: inherit;
  margin: 0;
}

.catalog-main-content .spec-accordion-btn .spec-accordion-icon {
  color: var(--color-white);
}

.catalog-main-content .spec-accordion-content,
.catalog-main-content .spec-accordion-body {
  width: 100%;
  align-self: stretch;
  box-sizing: border-box;
}

/* 外形図展開：opacity のみ・max-height と同時（ビビり防止） */
@keyframes spec-accordion-fade-in {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.catalog-main-content .spec-accordion-checkbox:checked ~ .spec-accordion-content > .spec-accordion-body {
  animation: spec-accordion-fade-in 0.4s cubic-bezier(0.22, 1, 0.36, 1) both;
}

@media (prefers-reduced-motion: reduce) {
  .catalog-main-content .spec-accordion-checkbox:checked ~ .spec-accordion-content > .spec-accordion-body {
    animation: none;
  }
}

/*
 * PC（992px〜）: 仕様書ブロックの見出し・下線・開閉パネルをすべて
 * 上段の「カタログPDFダウンロード」と同じ 22rem・右寄せに揃える
 */
@media (min-width: 992px) {
  /*
   * ペア行の下だけ詰める（ベースの padding-xl 下と margin-top が足し算になり離れすぎるのを防ぐ）
   * 値は max-width:991px のペアと同じ spacing-xs
   */
  .catalog-main-content .catalog-list:has(+ .spec-accordion.spec-accordion-group) .catalog-item,
  .catalog-main-content .content-box > .catalog-item:has(+ .spec-accordion.spec-accordion-group) {
    padding-bottom: var(--spacing-xs);
  }

  .catalog-main-content .spec-accordion.spec-accordion-group::after {
    left: 0;
    right: 0;
    width: 100%;
    max-width: none;
  }

  .catalog-main-content .spec-accordion.spec-accordion-group .spec-accordion-content {
    width: 100%;
    max-width: none;
    align-self: stretch;
  }

  .catalog-main-content .spec-accordion.spec-accordion-group .spec-accordion-body {
    width: 100%;
    max-width: none;
  }
}

@media (min-width: 769px) {
  .catalog-main-content .spec-accordion {
    background: transparent;
  }
}

@media (max-width: 768px) {
  .catalog-main-content .spec-accordion {
    background: transparent;
  }
}

.spec-link:hover {
  color: var(--color-black);
  text-decoration: underline;
}

.spec-link-icon {
  flex-shrink: 0;
  width: 16px;
  height: 16px;
  color: var(--color-black);
  transition: color 0.2s ease;
  opacity: 0.7;
}

/* カタログページ: ↗アイコンはPC/スマホとも不要 */
.catalog-main-content .spec-link-icon {
  display: none;
}

/* 選択状態：モノトーン（左ライン＋面で識別しやすく） */
.catalog-main-content .spec-link.is-selected {
  font-weight: var(--font-weight-bold);
  color: var(--color-gray-900);
  background-color: rgba(17, 24, 39, 0.07);
  border-left: 3px solid #4b5563;
  text-decoration: none;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: 4px;
  box-sizing: border-box;
  transition: background-color 0.15s ease, color 0.15s ease, box-shadow 0.15s ease;
}

.catalog-main-content .spec-accordion-checkbox:checked ~ .spec-accordion-content .spec-link.is-selected {
  color: #0f172a;
  background-color: rgba(255, 255, 255, 0.96);
  border-left-color: #171717;
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.08);
}

.catalog-main-content .spec-link.is-selected:hover {
  text-decoration: none;
  background-color: rgba(17, 24, 39, 0.11);
}

.catalog-main-content .spec-accordion-checkbox:checked ~ .spec-accordion-content .spec-link.is-selected:hover {
  color: #0f172a;
  background-color: #ffffff;
}

/* JSHP 外形図: 2階層（単相／三相）＋ 50Hz・60Hz 見出し */
.catalog-main-content .spec-accordion.spec-accordion-group:has(#catalog-spec-accordion-toggle:checked) > .spec-accordion-content {
  max-height: 60000px;
}

.spec-nested-accordions {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  width: 100%;
}

.catalog-main-content .spec-accordion--nested {
  width: 100%;
  align-items: stretch;
}

.catalog-main-content .spec-accordion--nested .spec-accordion-btn--nested {
  align-self: stretch;
  width: 100%;
  max-width: 100%;
  margin-left: 0;
  margin-right: 0;
  justify-content: space-between;
  box-sizing: border-box;
}

.catalog-main-content .spec-accordion--nested .spec-accordion-btn--nested .spec-accordion-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  white-space: normal;
  text-align: left;
}

.catalog-main-content .spec-accordion--nested .spec-accordion-checkbox:checked ~ .spec-accordion-content {
  max-height: 50000px;
}

.spec-accordion-body--nested {
  padding-top: var(--spacing-xs);
}

.spec-freq-block {
  margin-bottom: var(--spacing-lg);
}

.spec-freq-block:last-child {
  margin-bottom: 0;
}

.spec-freq-title {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-bold);
  letter-spacing: 0.06em;
  margin: 0 0 var(--spacing-sm);
  padding-bottom: var(--spacing-xs);
  border-bottom: 2px solid rgba(255, 255, 255, 0.35);
  color: rgba(255, 255, 255, 0.95);
}

/* 太陽光向けなど：2階層なし・展開パネルは配電用の内側ブロックと同じ余白 */
.catalog-main-content .spec-outline-flat.spec-accordion-body--nested {
  width: 100%;
  padding-top: var(--spacing-xs);
}

.catalog-main-content .spec-accordion.spec-accordion-group:has(#catalog-spec-accordion-toggle-solar:checked) > .spec-accordion-content {
  max-height: 60000px;
}

/* 右下POPUP */
.spec-request-popup {
  position: fixed;
  right: 16px;
  bottom: 16px;
  z-index: 11000;
}

.spec-request-popup-panel {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 8px;
  min-width: 12rem;
}

.spec-request-popup-count {
  margin: 0;
  padding: 6px 10px;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  text-align: center;
  color: #0f172a;
  background: #ffffff;
  border: 1px solid rgba(0, 0, 0, 0.2);
  border-radius: 6px;
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.2);
}

.spec-request-popup-clear {
  font-size: var(--font-size-sm);
  padding: 8px 12px;
  background: #ffffff;
  color: #111827;
  border: 1px solid rgba(0, 0, 0, 0.35);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.2);
}

.spec-request-popup-clear:hover {
  background: #f3f4f6;
}

.spec-request-popup-btn {
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.35);
}

/* カタログページ右下POPUP：白背景・黒文字 */
.spec-request-popup .spec-request-popup-btn.btn {
  background: #ffffff;
  color: #000000;
  border: 1px solid rgba(0, 0, 0, 0.85);
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 12px 14px;
}

.spec-request-popup-icon {
  display: block;
}

.spec-request-popup-text {
  display: block;
  line-height: 1.1;
}

.spec-request-popup .spec-request-popup-btn.btn:hover {
  background: #f3f4f6;
  color: #000000;
  border-color: rgba(0, 0, 0, 0.95);
}

.spec-link:hover .spec-link-icon {
  opacity: 1;
}

/*
 * PC版アコーディオン（FAQレイアウト）
 * .spec-accordion-btn 付きはカタログ「外形図PDF」用の枠線ボタンなので除外する
 */
@media (min-width: 769px) {
  .spec-accordion {
    margin-top: var(--spacing-md);
    border: none;
    border-radius: 0;
    background-color: transparent;
    overflow: visible;
    width: 100%;
    position: relative;
  }

  .spec-accordion-header:not(.spec-accordion-btn) {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    cursor: pointer;
    background-color: var(--color-primary);
    border-bottom: 1px solid #E5E7EB;
    transition: background-color 0.2s ease;
    user-select: none;
    width: 100%;
  }

  .spec-accordion-header:not(.spec-accordion-btn):hover {
    background-color: var(--color-secondary);
  }

  .spec-accordion-checkbox:checked + .spec-accordion-header:not(.spec-accordion-btn) {
    background-color: var(--color-secondary);
    border-bottom-color: #E5E7EB;
  }

  .spec-accordion-title {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    color: var(--color-white) !important;
    margin: 0;
    line-height: 1.6;
    white-space: nowrap;
  }

  .spec-accordion-icon {
    width: 18px;
    height: 18px;
    transition: transform 0.3s ease;
    color: var(--color-white);
    flex-shrink: 0;
  }

  .spec-accordion-body {
    padding: var(--spacing-xl);
    background-color: transparent;
    border-top: none;
    border-left: none;
    border-right: none;
    width: 100%;
    box-sizing: border-box;
  }

  .spec-accordion-checkbox:checked ~ .spec-accordion-content {
    background-color: #363636;
  }

  .spec-accordion-checkbox:checked ~ .spec-accordion-content .spec-accordion-body {
    background-color: #363636;
    border-top: none;
    color: var(--color-white);
  }

  .spec-accordion-checkbox:checked ~ .spec-accordion-content .spec-link {
    color: var(--color-white);
  }

  .spec-accordion-checkbox:checked ~ .spec-accordion-content .spec-link-icon {
    color: var(--color-white);
  }

  .spec-list-items {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    column-gap: var(--spacing-xl);
    row-gap: var(--spacing-sm);
    text-align: left;
  }

  .spec-list-items li {
    margin: 0;
    padding: 0;
    line-height: 1.2;
  }

  .spec-link {
    display: flex;
    align-items: flex-start;
    gap: 6px;
    color: #374151;
    text-decoration: none;
    font-size: var(--font-size-sm);
    transition: color 0.2s ease;
    text-align: left;
    justify-content: flex-start;
    margin: 0;
    padding: 0;
    line-height: 1.35;
    width: 100%;
    min-height: 0;
    height: auto;
  }

  /* 3列の縦ラインを揃えるため、アイコン幅を固定 */
  .spec-link-icon {
    flex: 0 0 16px;
    margin-top: 2px;
  }
}

/* ========================================
   Contact CTA
   ======================================== */

.catalog-contact-cta {
  background: var(--color-white);
  color: var(--color-gray-900);
  padding: var(--spacing-3xl);
  border-radius: 0;
  text-align: center;
  margin-top: var(--spacing-3xl);
  border: 1px solid var(--color-gray-200);
}

.catalog-contact-cta .section-title {
  color: var(--color-gray-900);
  margin-bottom: var(--spacing-lg);
}

.catalog-contact-cta p {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-xl);
  color: var(--color-gray-600);
}

/* CTA内でも catalog-item-desc の見た目を優先（一覧の説明文と同じ仕様に揃える） */
.catalog-contact-cta .catalog-item-desc {
  font-size: var(--font-size-base);
  line-height: 1.6;
  margin: 0 0 var(--spacing-xl);
  /* .catalog-item-desc が text-align: left !important のため、CTA内は上書きする */
  text-align: center !important;
  width: 100%;
}

.catalog-contact-cta .btn {
  background: linear-gradient(to bottom, #ffffff, #808080);
  color: #000;
  border: none;
  font-weight: var(--font-weight-semibold);
  padding: var(--spacing-md) var(--spacing-2xl);
  font-size: var(--font-size-lg);
  border-radius: var(--spacing-sm);
  box-shadow: none;
  text-shadow: none;
  position: relative;
  overflow: hidden;
  transition: color 1s ease;
}

.catalog-contact-cta .btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, #ffffff, #c0c0c0);
  opacity: 0;
  transition: opacity 1s ease;
  z-index: 0;
}

.catalog-contact-cta .btn:hover {
  color: #555;
}

.catalog-contact-cta .btn:hover::before {
  opacity: 0.5;
}

.catalog-contact-cta .btn > * {
  position: relative;
  z-index: 1;
}

/* ホバー効果を削除 */

/* ========================================
   Site Footer
   ======================================== */

.catalog-site-footer {
  position: relative;
}

/* ========================================
   Responsive Design
   ======================================== */

/* Tablet */
@media (max-width: 991px) {
  /*
   * スマホ〜タブ: カタログPDFと仕様書を近づける（下パディングと margin の二重化を抑える）
   * ※PCでは効かせない（重なりの原因になる）
   */
  .catalog-main-content .catalog-list:has(+ .spec-accordion.spec-accordion-group) .catalog-item,
  .catalog-main-content .content-box > .catalog-item:has(+ .spec-accordion.spec-accordion-group) {
    padding-bottom: var(--spacing-xs);
  }

  .catalog-item {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-lg);
  }
  
  .catalog-info {
    margin-right: 0;
    margin-bottom: var(--spacing-md);
    width: 100%;
    max-width: 100%;
  }

  .catalog-main-content .catalog-item-title,
  .catalog-main-content .catalog-item-desc,
  .catalog-main-content .catalog-content-box-hint {
    width: 100%;
    max-width: 100%;
  }

  .catalog-main-content .catalog-item {
    padding-block: var(--spacing-lg);
    padding-inline: 0;
  }
  
  .catalog-item .btn {
    align-self: flex-end;
    min-width: 120px;
  }

  .catalog-main-content .catalog-item > .btn {
    align-self: stretch;
    width: 100%;
    max-width: none;
  }

  /* PC の右寄せ用 align-items:flex-end を上書きし、カタログPDFボタンと同じく行幅いっぱいに */
  .catalog-main-content .spec-accordion.spec-accordion-group {
    align-items: stretch;
    align-self: stretch;
    width: 100%;
    max-width: 100%;
    margin-left: 0;
    margin-right: 0;
  }

  .catalog-main-content .spec-accordion.spec-accordion-group .spec-accordion-btn:not(.spec-accordion-btn--nested) {
    width: 100%;
    max-width: none;
    align-self: stretch;
    margin-left: 0;
    margin-right: 0;
  }
  
  .spec-accordion {
    margin-top: var(--spacing-lg);
  }
  
  .spec-list-items {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
    row-gap: var(--spacing-sm);
  }
}

/* Mobile */
@media (max-width: 768px) {
  .catalog-main-content .content-box {
    margin-bottom: var(--spacing-2xl);
    padding-left: var(--spacing-sm);
    padding-right: var(--spacing-sm);
  }

  .catalog-category-title {
    font-size: var(--font-size-xl);
  }
  
  .catalog-main-content > section:last-child {
    margin-bottom: var(--spacing-xs);
  }

  .catalog-main-content .content-box .section-title {
    font-size: clamp(1.25rem, 4.2vw, 1.75rem);
    padding-top: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    line-height: var(--line-height-tight);
  }

  .catalog-item {
    padding-block: var(--spacing-lg);
    padding-inline: 0;
  }

  /*
   * カタログPDFは .catalog-item の左右パディング内にあるが、
   * 仕様書アコーディオンは .content-box 直下のため同じインレットを明示（レスポンシブで幅を揃える）
   */
  .catalog-main-content .content-box > .spec-accordion.spec-accordion-group {
    /* 2列の1行あたり文字数を増やすため、左右インレットを少し削る */
    padding-left: var(--spacing-sm);
    padding-right: var(--spacing-sm);
    box-sizing: border-box;
  }

  
  .catalog-item-title {
    font-size: var(--font-size-base);
  }
  
  .catalog-item-desc {
    font-size: var(--font-size-sm);
  }
  
  .catalog-contact-cta {
    padding: var(--spacing-xl);
  }
  
  /* スマホ: footer「Solving Power Challenges」のお問い合わせボタンと同じサイズ感に揃える */
  .catalog-contact-cta .btn-contact {
    width: 80%;
    padding: var(--spacing-sm) var(--spacing-xl);
    font-size: var(--font-size-base);
  }
  
  .spec-accordion {
    margin-top: var(--spacing-lg);
    border: none;
    border-radius: 0;
    background-color: transparent;
    overflow: visible;
    width: 100%;
    position: relative;
  }
  
  .spec-accordion-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-sm);
    cursor: pointer;
    background-color: var(--color-primary);
    border-bottom: 1px solid #E5E7EB;
    transition: background-color 0.2s ease;
    user-select: none;
    width: 100%;
  }
  
  .spec-accordion-header:hover {
    background-color: var(--color-secondary);
  }
  
  .spec-accordion-checkbox:checked + .spec-accordion-header {
    background-color: var(--color-secondary);
    border-bottom-color: #E5E7EB;
  }
  
  .spec-accordion-title {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    color: var(--color-white) !important;
    margin: 0;
    line-height: 1.6;
    white-space: nowrap;
  }
  
  .spec-accordion-icon {
    width: 18px;
    height: 18px;
    transition: transform 0.3s ease;
    color: var(--color-white);
    flex-shrink: 0;
  }
  
  .spec-accordion-body {
    /* 2列の表示幅を稼ぐため左右を少し削る */
    padding: var(--spacing-lg) var(--spacing-sm);
    background-color: transparent;
    border-top: none;
    border-left: none;
    border-right: none;
    width: 100%;
    box-sizing: border-box;
  }

  .spec-accordion-checkbox:checked ~ .spec-accordion-content {
    background-color: #363636;
  }

  .spec-accordion-checkbox:checked ~ .spec-accordion-content .spec-accordion-body {
    background-color: #363636;
    border-top: none;
    color: var(--color-white);
  }

  .spec-accordion-checkbox:checked ~ .spec-accordion-content .spec-link {
    color: var(--color-white);
  }

  .spec-accordion-checkbox:checked ~ .spec-accordion-content .spec-link-icon {
    color: var(--color-white);
  }
  
  /* スマホ: アコーディオン用リストのみ2列（外形図 tbody.spec-list-items には適用しない） */
  .catalog-main-content ul.spec-list-items {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    /* 列間は確保しつつ、表示幅を優先 */
    column-gap: var(--spacing-md);
    row-gap: var(--spacing-sm);
    text-align: left;
  }

  /* スマホ: アイコンは消える前提なので gap を詰める */
  .catalog-main-content .spec-link {
    gap: 0;
  }

  .catalog-main-content .spec-link-icon {
    width: 14px;
    height: 14px;
  }
  
  .spec-list-items li {
    margin: 0;
    padding: 0;
    line-height: 1.1;
  }
  
  .spec-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: #374151;
    text-decoration: none;
    font-size: var(--font-size-sm);
    transition: color 0.2s ease;
    text-align: left;
    justify-content: flex-start;
    margin: 0;
    padding: var(--spacing-xs) 0;
    line-height: 1.6;
    width: 100%;
  }
}

/* スマホ版（小画面） */
@media (max-width: 576px) {
  .catalog-main-content .content-box .section-title {
    font-size: clamp(1.25rem, 4.2vw, 1.75rem);
    padding-top: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    line-height: var(--line-height-tight);
  }
  
  .catalog-item {
    padding-block: var(--spacing-md);
    padding-inline: 0;
  }

  .catalog-main-content .content-box {
    padding-left: var(--spacing-xs);
    padding-right: var(--spacing-xs);
  }

  .catalog-main-content .content-box > .spec-accordion.spec-accordion-group {
    padding-left: var(--spacing-sm);
    padding-right: var(--spacing-sm);
  }
  
  .catalog-item .btn {
    min-width: 100px;
    font-size: var(--font-size-sm);
    padding: var(--spacing-sm) var(--spacing-md);
  }
  
  /* 小画面: 本体は幅100%にして、展開パネルの表示幅を確保 */
  .spec-accordion {
    margin-top: var(--spacing-md);
    margin-left: 0;
    margin-right: 0;
    width: 100%;
    max-width: none;
  }

  /* ボタンだけ右寄せ（本体は100%のまま） */
  .catalog-main-content .spec-accordion .spec-accordion-btn {
    align-self: flex-end;
  }

  .catalog-main-content .spec-accordion.spec-accordion-group {
    width: 100%;
    max-width: 100%;
    margin-left: 0;
    margin-right: 0;
  }
  
  .spec-accordion-header {
    padding: var(--spacing-sm) var(--spacing-md);
  }
  
  .spec-accordion-title {
    font-size: var(--font-size-sm);
  }
  
  .spec-accordion-icon {
    width: 16px;
    height: 16px;
  }
  
  .spec-accordion-body {
    padding: var(--spacing-md);
  }
  
  /* 3番目の外形図PDFダウンロード（モールド変圧器）の下の白背景を伸ばす */
  .spec-accordion:has(#catalog-spec-accordion-toggle-mold) .spec-accordion-body {
    padding-bottom: var(--spacing-2xl);
  }
  
  /* 3番目のアコーディオン全体の下にマージンを追加 */
  .spec-accordion:has(#catalog-spec-accordion-toggle-mold) {
    margin-bottom: var(--spacing-lg);
  }
  
  .catalog-main-content ul.spec-list-items {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: var(--spacing-lg);
    row-gap: 6px;
  }
  
  .spec-list-items li {
    line-height: 0.9;
  }
  
  .spec-link {
    padding: 0;
    line-height: 0.9;
  }
}

/* ========================================
   外形図PDF（アコーディオンなし）
   ======================================== */

.catalog-main-content .catalog-content-box-hint {
  margin: 0 0 var(--spacing-xl);
  font-size: var(--font-size-sm);
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.72);
}

.catalog-main-content .catalog-product-group {
  margin-bottom: var(--spacing-lg);
}

.catalog-main-content .catalog-product-group:last-of-type {
  margin-bottom: 0;
}

.catalog-main-content .catalog-product-group > .catalog-item {
  border-bottom: none;
  padding-bottom: 0;
}

.catalog-main-content .catalog-product-group > .spec-outline-block {
  margin-top: var(--spacing-xl);
}

.catalog-main-content .catalog-divider {
  margin: var(--spacing-2xl) 0;
  border: none;
  border-top: 1px solid rgba(255, 255, 255, 0.28);
}

.catalog-main-content .spec-outline-block {
  width: 100%;
  text-align: left;
}

.catalog-main-content .spec-outline-heading {
  margin: 0 0 var(--spacing-sm);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  color: rgba(255, 255, 255, 0.92);
  letter-spacing: 0.04em;
}

/* 外形図：項目ごとに余白を持たせた通常のマス目 */
.catalog-main-content .spec-outline-sections {
  --spec-masu-line: rgba(255, 255, 255, 0.3);
  --spec-masu-line-outer: rgba(255, 255, 255, 0.45);
  display: block;
  background: transparent;
}

.catalog-main-content .spec-outline-section {
  min-width: 0;
  margin-bottom: var(--spacing-md);
  border: 2px solid var(--spec-masu-line-outer);
  box-sizing: border-box;
}

.catalog-main-content .spec-outline-section:last-child {
  margin-bottom: 0;
}

.catalog-main-content .spec-outline-section > *,
.catalog-main-content .spec-outline-table,
.catalog-main-content .spec-outline-table tbody,
.catalog-main-content .spec-outline-table tr,
.catalog-main-content .spec-outline-table td,
.catalog-main-content .spec-outline-table .spec-link {
  margin: 0;
}

.catalog-main-content .spec-outline-section-title {
  margin: 0;
  padding: 8px 12px;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-bold);
  color: var(--color-white);
  text-align: center;
  background: rgba(255, 255, 255, 0.06);
  border: none;
  border-bottom: 1px solid var(--spec-masu-line);
}

.catalog-main-content .spec-outline-table {
  width: 100%;
  display: table;
  border-collapse: collapse;
  font-size: var(--font-size-sm);
  table-layout: fixed;
  border: none;
  border-radius: 0;
  background: transparent;
}

.catalog-main-content .spec-outline-table .spec-list-items {
  display: table-row-group;
  padding: 0;
  margin: 0;
  list-style: none;
}

.catalog-main-content .spec-outline-table tr {
  display: table-row;
  margin: 0;
  padding: 0;
}

.catalog-main-content .spec-outline-table td {
  display: table-cell;
  width: 33.333%;
  padding: 0;
  vertical-align: middle;
  color: var(--color-white);
  border: 1px solid var(--spec-masu-line);
  transition: background-color 0.28s ease;
}

.catalog-main-content .spec-outline-table td.spec-outline-empty {
  pointer-events: none;
}

.catalog-main-content .spec-outline-table .spec-link {
  display: flex;
  align-items: center;
  position: relative;
  isolation: isolate;
  min-height: 52px;
  padding: 12px 14px;
  color: rgba(255, 255, 255, 0.94);
  font-weight: var(--font-weight-medium);
  text-decoration: none;
  line-height: 1.45;
  word-break: break-word;
  box-sizing: border-box;
  background: transparent;
  border: 0;
  border-radius: 0;
  box-shadow: none;
  transition: color 0.28s ease, font-weight 0.28s ease;
}

.catalog-main-content .spec-outline-table td:not(.spec-outline-empty):hover {
  background: transparent;
}

.catalog-main-content .spec-outline-table td:has(.spec-link.is-selected) {
  background: rgba(255, 255, 255, 0.06);
  box-shadow: none;
}

.catalog-main-content .spec-outline-table td:has(.spec-link.is-selected):hover {
  background: rgba(255, 255, 255, 0.1);
}

.catalog-main-content .spec-outline-table .spec-link.is-selected {
  color: #111827;
  font-weight: var(--font-weight-bold);
  padding: 12px 14px;
  background: transparent;
  border: 0;
  border-radius: 0;
  box-shadow: none;
}

.catalog-main-content .spec-outline-table .spec-link::before {
  content: '';
  position: absolute;
  inset: 5px;
  z-index: -1;
  background: rgba(255, 255, 255, 0.94);
  border-radius: 7px;
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.75);
  opacity: 0;
  transform: scale(0.96);
  transition: opacity 0.3s ease, transform 0.32s cubic-bezier(0.22, 1, 0.36, 1);
}

.catalog-main-content .spec-outline-table td:not(.spec-outline-empty):hover .spec-link::before {
  opacity: 0.22;
  transform: scale(1);
}

.catalog-main-content .spec-outline-table .spec-link.is-selected::before {
  opacity: 1;
  transform: scale(1);
}

/* 外形図データ未公開（太陽光・モールド等）— リンク・選択なし */
.catalog-main-content .spec-outline-pending-notice {
  margin: 0 0 12px;
  padding: 10px 14px;
  font-size: var(--font-size-sm, 0.875rem);
  line-height: 1.55;
  color: rgba(255, 255, 255, 0.82);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 6px;
}

.catalog-main-content .spec-outline-block--pending .spec-outline-table td:not(.spec-outline-empty) {
  pointer-events: none;
  cursor: default;
}

.catalog-main-content .spec-outline-block--pending .spec-outline-table td:not(.spec-outline-empty):hover {
  background: transparent;
}

.catalog-main-content .spec-outline-table .spec-outline-pending {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 10px;
  min-height: 52px;
  padding: 12px 14px;
  color: rgba(255, 255, 255, 0.72);
  font-weight: var(--font-weight-medium);
  line-height: 1.45;
  word-break: break-word;
  box-sizing: border-box;
}

.catalog-main-content .spec-outline-pending-label {
  flex: 1 1 auto;
  min-width: 0;
}

.catalog-main-content .spec-outline-pending-badge {
  flex: 0 0 auto;
  padding: 2px 8px;
  font-size: 0.75rem;
  font-weight: var(--font-weight-bold);
  letter-spacing: 0.04em;
  color: rgba(255, 255, 255, 0.9);
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: 4px;
}

@media (max-width: 768px) {
  .catalog-main-content .spec-outline-table {
    display: block;
    font-size: var(--font-size-xs, 0.8125rem);
  }

  .catalog-main-content .spec-outline-table .spec-list-items {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 0;
    row-gap: 0;
    gap: 0;
    margin: 0;
    padding: 0;
  }

  .catalog-main-content .spec-outline-table tr {
    display: contents;
  }

  .catalog-main-content .spec-outline-table td {
    display: flex;
    width: auto;
    min-width: 0;
    padding: 0;
    margin: 0;
  }

  .catalog-main-content .spec-outline-table .spec-link {
    width: 100%;
    flex: 1 1 auto;
  }

  .catalog-main-content .spec-outline-table td.spec-outline-empty {
    display: none;
  }

  .catalog-main-content .spec-outline-section-title {
    padding-left: 10px;
    padding-right: 10px;
  }
}