/* 基本・リセット */
*,
*::before,
*::after {
  box-sizing: border-box;
}
body {
  margin: 0;
  font-family: "Hiragino UD Sans Std", "Hiragino Kaku Gothic ProN", "メイリオ", Meiryo, sans-serif;
  color: #333;
  line-height: 1.6;
}

img {
  max-width: 100%;
  height: auto;
  vertical-align: middle;
}

a {
  color: inherit;
  text-decoration: none;
}

ul, ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

/* ヘッダー */
.header {
  padding: 12px 24px;
  border-bottom: 1px solid #eee;
}
.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.header .logo {
  margin-right: 16px;
}
.header .logo img {
  display: block;
  height: 40px;
  width: auto;
}
.header-nav {
  display: flex;
  align-items: center;
  gap: 24px;
}
.header-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: #0066cc;
  font-size: 9.5pt;
}
.header-link .header-icon {
  width: auto;
  height: 20px;
  object-fit: contain;
  vertical-align: middle;
}

/* ヘッダー：モバイル版 */
@media (max-width: 768px) {
  .header {
    padding: 8px 12px;
  }
  .header-inner {
    flex-wrap: nowrap;
    min-width: 0;
  }
  .header .logo {
    flex-shrink: 0;
  }
  .header .logo img {
    height: 28px;
  }
  .header-nav {
    flex-shrink: 0;
    gap: 12px;
    align-items: center;
  }
  .header-link {
    font-size: 8.5pt;
    gap: 4px;
    white-space: nowrap;
  }
  .header-link .header-icon {
    height: 16px;
  }
  .hero-lead {
    font-size: 10pt;
  }
  /* モバイル：赤帯を中央揃え・全改行 */
  .hero-band-info {
    text-align: center;
  }
  .hero-band-info .hero-band-line {
    display: block;
  }
  .hero-band-info .hero-band-line:nth-child(1)::after {
    content: none;
  }
  .hero-band-info .hero-band-line:nth-child(3) {
    margin-top: 0;
  }
  .overview-body {
    line-height: 1.45;
  }
  .main-visual {
    margin: -25pt 0 20px;
  }
  .overview-grid {
    gap: calc(32px - 10pt) 72px;
  }
  /* モバイル：アコーディオン（本文は小見出しクリックで開閉） */
  .overview-item {
    border: 1px solid #ddd;
    border-radius: 4px;
    margin-bottom: 8px;
  }
  .overview-item[open] {
    border-color: #ec0e00;
  }
  .overview-item .overview-heading {
    margin: 0;
    padding: 12px 16px;
    padding-right: 2.5em;
    cursor: pointer;
    user-select: none;
    font-size: 12pt;
    position: relative;
  }
  .overview-item .overview-heading br {
    display: none;
  }
  .overview-item .overview-heading::after {
    content: "＋";
    position: absolute;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 18px;
    color: #ec0e00;
  }
  .overview-item[open] .overview-heading::after {
    content: "−";
  }
  .overview-item .overview-body {
    padding: 7pt 16px 16px;
    border-top: 1px solid #eee;
  }
}

/* PC：summaryをクリック不可にして常時表示・見た目は従来どおり */
@media (min-width: 769px) {
  .overview-item {
    border: none;
    border-radius: 0;
    margin-bottom: 0;
  }
  .overview-item .overview-heading {
    cursor: default;
    pointer-events: none;
    margin: 0 0 16px;
    padding-left: 16px;
  }
  .overview-item .overview-heading::after {
    display: none;
  }
  .overview-item .overview-body {
    padding: 0;
    border-top: none;
  }
}

/* パンくず */
.breadcrumb {
  max-width: 1200px;
  margin: 0 auto;
  padding: 12px 24px;
  font-size: 13px;
  color: #000;
}
.breadcrumb a {
  color: #0066cc;
}
.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0 8px;
}
.breadcrumb li:not(:last-child)::after {
  content: " > ";
  margin-left: 8px;
  color: #000;
}
.breadcrumb a:hover {
  text-decoration: underline;
}

/* ヒーロー（タイトル・赤帯・説明） */
.hero {
  padding: 24px 24px 32px;
}
.hero-inner {
  max-width: 1000px;
  margin: 0 auto;
}
.hero-title-img {
  text-align: center;
  margin: 0 0 20pt;
}
.hero-title-img img {
  max-width: 100%;
  height: auto;
}
.hero-band {
  background: #d80000;
  color: #fff;
  text-align: center;
  padding: 16px 24px;
  margin: 0 0 24px;
  font-family: "Hiragino UD Sans Std N", "Hiragino Kaku Gothic ProN", "メイリオ", Meiryo, sans-serif;
  font-weight: 300;
  font-size: 11pt;
  line-height: 1.6;
}
.hero-band p {
  margin: 0 0 8px;
}
.hero-band-info .hero-band-line {
  display: inline;
}
.hero-band-info .hero-band-line:nth-child(1)::after {
  content: "　　";
}
.hero-band-info .hero-band-line:nth-child(3) {
  display: block;
  margin-top: 0.25em;
}
.hero-band p:last-child {
  margin-bottom: 0;
}
.hero-link-wrap {
  margin-top: 12px;
}
.hero-link {
  display: inline-block;
  padding: 8px 20px;
  border: 2px solid #fff;
  color: #fff;
  font-size: 10pt;
}
.hero-link:hover {
  background: rgba(255,255,255,0.2);
}
.hero-heading {
  font-family: "Hiragino UD Serif Std N", "Hiragino Mincho ProN", "游明朝", "Yu Mincho", serif;
  font-size: 21pt;
  font-weight: 600;
  text-align: center;
  margin: 1rem auto;
  line-height: 1.4;
}
.hero-lead {
  font-family: "Hiragino UD Sans Std", "Hiragino Kaku Gothic ProN", sans-serif;
  font-size: 12pt;
  text-align: justify;
  margin: 0;
  max-width: 1000px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.7;
}

/* メインビジュアル（概要と同じ幅・縦横比維持） */
.main-visual {
  margin: -25pt 0 32px;
  padding: 0 24px;
}
.main-visual img {
  max-width: 1200px;
  width: 100%;
  height: auto;
  display: block;
  margin: 0 auto;
}
.main-visual-caption {
  max-width: 1200px;
  margin: 15px auto 0;
  padding: 0 15px;
  font-family: "Hiragino UD Sans Std", "Hiragino Kaku Gothic ProN", sans-serif;
  font-size: 12pt;
  line-height: 1.7;
  text-align: justify;
}
.main-visual-caption p {
  margin: 0 0 12px;
}
.main-visual-caption p:last-child {
  margin-bottom: 0;
}

/* 概要 2段4項目 */
.overview {
  padding: 32px 24px 40px;
}
.overview-inner {
  max-width: 1200px;
  margin: 0 auto;
}
.overview-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px 72px;
}
.overview-item summary::-webkit-details-marker,
.overview-item summary::marker {
  display: none;
}
.overview-heading {
  font-family: "Hiragino UD Serif Std N", "Hiragino Mincho ProN", serif;
  font-size: 22pt;
  font-weight: 600;
  margin: 0 0 16px;
  padding-left: 16px;
  border-left: 7px solid #ec0e00;
  line-height: 1.4;
  list-style: none;
  cursor: pointer;
}
.overview-item summary.overview-heading::-webkit-details-marker {
  display: none;
}
.overview-body {
  font-size: 12pt;
  line-height: 1.7;
}
.overview-body p {
  margin: 0 0 12px;
}
.overview-body p:last-of-type {
  margin-bottom: 0;
}
.overview-body ul {
  list-style: none;
  margin: 12px 0;
  padding: 0;
}
.overview-body ul li {
  position: relative;
  padding-left: 1.2em;
  margin-bottom: 6px;
}
.overview-body ul li::before {
  content: "・";
  position: absolute;
  left: 0;
}
.overview-img {
  margin-top: 20px;
}
.overview-img img {
  width: 100%;
  height: auto;
}

/* 弊社の概要 */
.about {
  background: #cccccc;
  padding: 32px 24px;
}
.about-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 40px;
  align-items: start;
}
.about-left {
  padding-right: 24px;
}
.about-title-en {
  font-family: "Hiragino UD Serif Std N", "Hiragino Mincho ProN", serif;
  font-size: 30pt;
  font-weight: 600;
  color: #0066cc;
  margin: 0 0 8px;
}
.about-title-ja {
  font-family: "Hiragino UD Serif Std N", "Hiragino Mincho ProN", serif;
  font-size: 10pt;
  color: #000;
  margin: 0;
}
.about-right {
  font-family: "Hiragino UD Sans Std", "Hiragino Kaku Gothic ProN", sans-serif;
  font-size: 12pt;
  line-height: 1.8;
}
.about-right p {
  margin: 0;
}

/* 過去の出展レポート */
.reports {
  padding: 32px 24px 40px;
}
.reports-inner {
  max-width: 1200px;
  margin: 0 auto;
}
.reports-heading {
  font-family: "Hiragino UD Serif Std N", "Hiragino Mincho ProN", serif;
  font-size: 20pt;
  font-weight: 600;
  margin: 0 0 24px;
  padding-left: 16px;
  border-left: 7px solid #ec0e00;
}
.reports-list {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: left;
}
.reports-list li {
  display: flex;
  flex-direction: column;
}
.reports-link {
  display: block;
  text-decoration: none;
  color: inherit;
}
.reports-link:hover img {
  opacity: 0.9;
}
.reports-img {
  display: block;
  margin: 0 0 12px;
}
.reports-img img {
  width: 100%;
  display: block;
}
.reports-link .reports-caption-main {
  display: inline-block;
  position: relative;
  font-size: 10pt;
  font-weight: 600;
  margin: 0 0 4px;
  transition: color 0.2s ease;
}
.reports-link .reports-caption-main::before {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0;
  height: 2px;
  background: #ec0e00;
  transition: width 0.25s ease;
}
.reports-link .reports-caption-main::after {
  content: " ▶";
  font-size: 0.85em;
  color: #ec0e00;
  opacity: 0;
  transition: opacity 0.25s ease;
}
.reports-link:hover .reports-caption-main::before {
  width: 100%;
}
.reports-link:hover .reports-caption-main::after {
  opacity: 1;
}
.reports-caption-sub {
  font-size: 10pt;
  margin: 0;
  color: #555;
  line-height: 1.5;
}

/* フッター */
.footer {
  background: #000000;
  color: #fff;
  padding: 32px 24px 24px;
  text-align: center;
}
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
}
.footer-sns {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 16px;
  margin: 0 0 24px;
}
.footer-sns a {
  display: block;
  line-height: 0;
}
.footer-sns img {
  width: 32px;
  height: 32px;
  object-fit: contain;
  opacity: 1;
}
.footer-sns a:hover img {
  opacity: 0.8;
}
.footer-logo {
  margin: 0 0 24px;
}
.footer-logo img {
  max-width: 180px;
  height: auto;
}
.footer-copy {
  font-size: 12px;
  margin: 0;
  color: #fff;
}

/* レスポンシブ：タブレット以下で2段→1段・4枚→2枚など */
@media (max-width: 900px) {
  .overview-grid {
    grid-template-columns: 1fr;
  }
  .about-inner {
    grid-template-columns: 1fr;
  }
  .reports-list {
    grid-template-columns: repeat(2, 1fr);
  }
  .hero-heading {
    font-size: 18px;
  }
  .hero-lead {
    font-size: 18px;
  }
  .main-visual-caption {
    margin: 10px auto 0;
    padding: 0 0px;
  }
}

@media (max-width: 600px) {
  .reports-list {
    grid-template-columns: 1fr;
  }
  .header-nav .header-link span {
    display: none;
  }
  .overview-heading,
  .reports-heading {
    font-size: 24px;
  }
  .overview-body {
    font-size: 18px;
  }
}