/* ==============================================================
   achievements.css
   文献・表彰・発表実績・導入実績ページ
   日本電池再生株式会社

   デザイン方針：
   - ベースカラー：白・紺・グレー
   - アクセント：金色 / 落ち着いた緑
   - 雰囲気：上品・信頼感・研究開発型企業・国際性
   - プレフィックス: ac-*（achievements専用）
   ============================================================== */


/* ==============================
   1. CSS Custom Properties
   ============================== */
:root {
  /* ── Core Colors ── */
  --ac-navy:       #0C2340;
  --ac-navy-mid:   #163660;
  --ac-navy-light: #1C4880;
  --ac-navy-deep:  #061624;
  --ac-navy-pale:  #E8EDF5;

  --ac-white:      #FFFFFF;
  --ac-gray-25:    #FAFBFC;
  --ac-gray-50:    #F4F6F9;
  --ac-gray-100:   #EAEEF3;
  --ac-gray-200:   #D8DFE8;
  --ac-gray-300:   #B8C3D0;
  --ac-gray-400:   #8C9BAC;
  --ac-gray-500:   #637282;
  --ac-gray-600:   #485664;
  --ac-gray-700:   #323D4A;
  --ac-gray-900:   #151C26;

  /* ── Gold（表彰アクセント）── */
  --ac-gold:       #B8860B;
  --ac-gold-mid:   #C9940D;
  --ac-gold-light: #E0A820;
  --ac-gold-pale:  #FDF6E3;
  --ac-gold-bright:#F2C44A;

  /* ── Green ── */
  --ac-green:      #1B7A40;
  --ac-green-mid:  #218F4A;
  --ac-green-light:#27AA57;
  --ac-green-pale: #E2F2EA;

  /* ── Text ── */
  --ac-text:       #1C2733;
  --ac-text-mid:   #3D4F62;
  --ac-text-light: #596C7F;
  --ac-text-muted: #8A98A8;

  /* ── Typography ── */
  --ac-font-sans:  'Noto Sans JP', 'Hiragino Kaku Gothic ProN', 'YuGothic', sans-serif;
  --ac-font-serif: 'Noto Serif JP', 'Hiragino Mincho ProN', 'Yu Mincho', Georgia, serif;

  /* ── Layout ── */
  --ac-container: 1100px;
  --ac-header-h:  70px;

  /* ── Radii ── */
  --ac-r-sm:  4px;
  --ac-r-md:  8px;
  --ac-r-lg:  12px;
  --ac-r-xl:  18px;
  --ac-r-2xl: 26px;

  /* ── Shadows ── */
  --ac-sh-xs: 0 1px 3px  rgba(12,35,64,.06);
  --ac-sh-sm: 0 2px 8px  rgba(12,35,64,.08);
  --ac-sh-md: 0 4px 18px rgba(12,35,64,.11);
  --ac-sh-lg: 0 8px 32px rgba(12,35,64,.14);
  --ac-sh-xl: 0 16px 48px rgba(12,35,64,.17);

  --ac-ease: cubic-bezier(.4, 0, .2, 1);
}


/* ==============================
   2. Reset & Base
   ============================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--ac-font-sans);
  font-size: 16px;
  line-height: 1.8;
  color: var(--ac-text);
  background: var(--ac-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-weight: 300;
}

img    { max-width: 100%; height: auto; display: block; }
a      { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }

sup {
  font-size: .56em;
  vertical-align: super;
  line-height: 0;
}

.ac-br-pc { display: block; }
.ac-br-sp { display: none; }


/* ==============================
   3. Layout Utilities
   ============================== */
.ac-container {
  max-width: var(--ac-container);
  margin: 0 auto;
  padding: 0 clamp(20px, 5vw, 52px);
}

.ac-section {
  padding: clamp(72px, 10vw, 120px) 0;
}

.ac-section--white      { background: var(--ac-white); }
.ac-section--gray       { background: var(--ac-gray-50); }

.ac-section--navy {
  background: linear-gradient(148deg, var(--ac-navy-deep) 0%, var(--ac-navy) 55%, #12325A 100%);
}

.ac-section--conclusion {
  background: linear-gradient(148deg, var(--ac-navy-deep) 0%, #0C2D4E 50%, #1A3D28 100%);
}


/* ==============================
   4. Section Header (汎用)
   ============================== */
.ac-sec-hd {
  text-align: center;
  margin-bottom: clamp(44px, 6vw, 64px);
}

.ac-sec-hd--left {
  text-align: left;
  margin-bottom: 32px;
}

.ac-sec-eyebrow {
  display: block;
  font-size: .63rem;
  font-weight: 600;
  letter-spacing: .24em;
  color: var(--ac-navy-light);
  margin-bottom: 11px;
}
.ac-sec-eyebrow--light { color: rgba(255,255,255,.38); }

.ac-sec-title {
  font-family: var(--ac-font-serif);
  font-size: clamp(1.3rem, 2.8vw, 2.05rem);
  font-weight: 600;
  color: var(--ac-navy);
  line-height: 1.4;
  letter-spacing: -.02em;
  margin-bottom: 10px;
}
.ac-sec-title--light { color: var(--ac-white); }

.ac-sec-lead {
  font-size: .88rem;
  font-weight: 300;
  color: var(--ac-text-light);
  line-height: 1.85;
  margin-bottom: 6px;
}
.ac-sec-lead--light { color: rgba(255,255,255,.52); }

/* デコレーティブルール */
.ac-sec-rule {
  width: 72px;
  height: 2px;
  background: var(--ac-gray-200);
  border-radius: 2px;
  margin: 18px auto 0;
  position: relative;
  overflow: visible;
}
.ac-sec-rule--light { background: rgba(255,255,255,.1); }
.ac-sec-rule::before {
  content: "";
  position: absolute;
  top: 0; left: 0;
  width: 28px; height: 100%;
  background: var(--ac-navy);
  border-radius: 2px;
}
.ac-sec-rule--light::before { background: var(--ac-gold-light); }


/* ==============================
   5. Header
   ============================== */
.ac-header {
  position: sticky;
  top: 0;
  z-index: 500;
  height: var(--ac-header-h);
  background: rgba(6, 22, 36, .97);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255,255,255,.07);
}

.ac-header-inner {
  max-width: var(--ac-container);
  margin: 0 auto;
  padding: 0 clamp(20px, 5vw, 52px);
  height: 100%;
  display: flex;
  align-items: center;
  gap: 16px;
}

.ac-header-logo {
  display: flex;
  align-items: center;
  gap: 11px;
  flex-shrink: 0;
  text-decoration: none;
}

.ac-header-logo-img {
  height: 32px;
  width: auto;
  object-fit: contain;
  filter: brightness(1.08);
}

.ac-header-company {
  font-size: .78rem;
  font-weight: 500;
  color: rgba(255,255,255,.72);
  letter-spacing: .04em;
  white-space: nowrap;
}

.ac-header-nav {
  display: flex;
  align-items: center;
  gap: 2px;
  margin: 0 auto;
}

.ac-nav-link {
  font-size: .74rem;
  font-weight: 400;
  letter-spacing: .04em;
  color: rgba(255,255,255,.5);
  padding: 6px 12px;
  border-radius: var(--ac-r-md);
  transition: color .2s, background .2s;
  white-space: nowrap;
}
.ac-nav-link:hover {
  color: var(--ac-white);
  background: rgba(255,255,255,.07);
}

.ac-header-back {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: .74rem;
  color: rgba(255,255,255,.42);
  letter-spacing: .04em;
  white-space: nowrap;
  flex-shrink: 0;
  transition: color .2s;
  text-decoration: none;
}
.ac-header-back:hover { color: rgba(255,255,255,.78); }
.ac-header-back i     { font-size: .64rem; }


/* ==============================
   6. Hero Section
   ============================== */
.ac-hero {
  position: relative;
  background: linear-gradient(148deg, var(--ac-navy-deep) 0%, #0D2745 48%, #12345C 100%);
  padding: clamp(64px, 10vw, 120px) 0 clamp(52px, 8vw, 88px);
  overflow: hidden;
}

/* 背景デコ */
.ac-hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(ellipse 60% 55% at 88% 15%, rgba(184,134,11,.08), transparent),
    radial-gradient(ellipse 40% 50% at 5%  80%, rgba(27,122,64,.06), transparent),
    radial-gradient(ellipse 35% 40% at 50% 50%, rgba(28,72,128,.18), transparent);
}

.ac-hero-inner {
  max-width: var(--ac-container);
  margin: 0 auto;
  padding: 0 clamp(20px, 5vw, 52px);
  position: relative;
}

.ac-hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-size: .62rem;
  font-weight: 600;
  letter-spacing: .24em;
  color: rgba(255,255,255,.42);
  margin-bottom: 22px;
}

.ac-eyebrow-dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  background: var(--ac-gold-light);
  border-radius: 50%;
  flex-shrink: 0;
  animation: ac-dot-blink 2.4s ease-in-out infinite;
}

@keyframes ac-dot-blink {
  0%, 100% { opacity: 1; }
  50%       { opacity: .25; }
}

.ac-hero-title {
  font-family: var(--ac-font-serif);
  font-size: clamp(2rem, 5.5vw, 3.6rem);
  font-weight: 600;
  color: var(--ac-white);
  letter-spacing: -.025em;
  line-height: 1.25;
  margin-bottom: 20px;
}

.ac-hero-subtitle {
  font-size: clamp(.88rem, 1.6vw, 1.05rem);
  font-weight: 300;
  color: rgba(255,255,255,.55);
  letter-spacing: .04em;
  margin-bottom: 52px;
}

/* スタッツバー */
.ac-hero-stats {
  display: flex;
  align-items: center;
  gap: clamp(18px, 4vw, 44px);
  flex-wrap: wrap;
}

.ac-stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.ac-stat-num {
  font-family: var(--ac-font-serif);
  font-size: clamp(1.8rem, 3.8vw, 2.8rem);
  font-weight: 600;
  color: var(--ac-gold-bright);
  line-height: 1;
  letter-spacing: -.02em;
}

.ac-stat-plus {
  font-size: .6em;
  vertical-align: super;
  line-height: 0;
}

.ac-stat-label {
  font-size: .72rem;
  font-weight: 400;
  color: rgba(255,255,255,.42);
  letter-spacing: .06em;
  white-space: nowrap;
}

.ac-stat-div {
  width: 1px;
  height: 44px;
  background: rgba(255,255,255,.1);
  flex-shrink: 0;
}


/* ==============================
   7. Lead Section
   ============================== */
.ac-lead-block {
  display: flex;
  align-items: flex-start;
  gap: 28px;
  background: var(--ac-gray-50);
  border: 1px solid var(--ac-gray-200);
  border-left: 4px solid var(--ac-gold);
  border-radius: 0 var(--ac-r-xl) var(--ac-r-xl) 0;
  padding: clamp(26px, 4vw, 40px) clamp(24px, 4vw, 40px);
  margin-bottom: 40px;
  box-shadow: var(--ac-sh-xs);
}

.ac-lead-deco {
  flex-shrink: 0;
  width: 52px;
  height: 52px;
  background: linear-gradient(135deg, var(--ac-gold), var(--ac-gold-light));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--ac-white);
  font-size: 1.3rem;
  box-shadow: 0 4px 16px rgba(184,134,11,.3);
  margin-top: 2px;
}

.ac-lead-text {
  font-size: .94rem;
  font-weight: 300;
  color: var(--ac-text-mid);
  line-height: 2.1;
  margin-bottom: 16px;
}
.ac-lead-text:last-child { margin-bottom: 0; }
.ac-lead-text strong {
  font-weight: 600;
  color: var(--ac-navy);
}

/* カテゴリタグ */
.ac-lead-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.ac-lead-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: .8rem;
  font-weight: 500;
  color: var(--ac-navy);
  background: var(--ac-navy-pale);
  border: 1px solid var(--ac-gray-200);
  border-radius: 999px;
  padding: 8px 20px;
  transition: background .2s, box-shadow .2s, transform .2s;
  letter-spacing: .03em;
}
.ac-lead-tag:hover {
  background: var(--ac-navy-pale);
  box-shadow: var(--ac-sh-sm);
  transform: translateY(-2px);
}
.ac-lead-tag i { font-size: .86rem; color: var(--ac-navy-light); }

.ac-lead-tag--gold {
  background: var(--ac-gold-pale);
  border-color: rgba(184,134,11,.25);
  color: var(--ac-gold);
}
.ac-lead-tag--gold i   { color: var(--ac-gold); }

.ac-lead-tag--green {
  background: var(--ac-green-pale);
  border-color: rgba(27,122,64,.2);
  color: var(--ac-green);
}
.ac-lead-tag--green i  { color: var(--ac-green); }


/* ==============================
   8. Gallery Section
   ============================== */
.ac-gallery-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 36px;
  justify-content: center;
}

.ac-gallery-tab {
  font-family: var(--ac-font-sans);
  font-size: .8rem;
  font-weight: 500;
  letter-spacing: .06em;
  color: var(--ac-text-light);
  background: var(--ac-white);
  border: 1px solid var(--ac-gray-200);
  border-radius: 999px;
  padding: 8px 22px;
  cursor: pointer;
  transition: background .2s, color .2s, border-color .2s, box-shadow .2s;
  outline: none;
}
.ac-gallery-tab:hover {
  background: var(--ac-navy-pale);
  color: var(--ac-navy);
  border-color: var(--ac-navy-pale);
}
.ac-gallery-tab--active {
  background: var(--ac-navy);
  color: var(--ac-white);
  border-color: var(--ac-navy);
  box-shadow: 0 3px 10px rgba(12,35,64,.2);
}

/* グリッド */
.ac-gallery-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 18px;
  margin-bottom: 20px;
}

.ac-gallery-item {
  cursor: default;
}

.ac-gallery-img-wrap {
  position: relative;
  border-radius: var(--ac-r-lg);
  overflow: hidden;
  aspect-ratio: 4 / 3;
  margin-bottom: 10px;
}

/* プレースホルダー */
.ac-gallery-img-wrap--placeholder {
  background: var(--ac-gray-100);
  border: 1px dashed var(--ac-gray-300);
}
.ac-gallery-img-wrap--gold    { background: var(--ac-gold-pale);   border-color: rgba(184,134,11,.25); }
.ac-gallery-img-wrap--navy    { background: var(--ac-navy-pale);   border-color: rgba(12,35,64,.15); }
.ac-gallery-img-wrap--green   { background: var(--ac-green-pale);  border-color: rgba(27,122,64,.2); }

/* 縦長コンテンツ（書影・賞状）全体表示用 */
.ac-gallery-img-wrap--contain {
  background: #fff;
  aspect-ratio: 3 / 4;   /* 縦長アスペクトに変更 */
  padding: 10px;
  box-sizing: border-box;
}
.ac-gallery-contain-img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center center;
  display: block;
  transition: transform .3s var(--ac-ease);
}
.ac-gallery-img-wrap--contain:hover .ac-gallery-contain-img {
  transform: scale(1.04);
}

.ac-gallery-placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  color: var(--ac-gray-400);
  font-size: .73rem;
  letter-spacing: .04em;
  text-align: center;
  padding: 8px;
}
.ac-gallery-placeholder i { font-size: 1.6rem; opacity: .5; }

/* カテゴリバッジ */
.ac-gallery-cat-badge {
  position: absolute;
  top: 8px;
  left: 8px;
  font-size: .62rem;
  font-weight: 600;
  letter-spacing: .08em;
  padding: 3px 9px;
  border-radius: 999px;
}

.ac-cat--pub     { background: var(--ac-navy);        color: var(--ac-white); }
.ac-cat--award   { background: var(--ac-gold);         color: var(--ac-white); }
.ac-cat--intl    { background: var(--ac-navy-mid);     color: var(--ac-white); }
.ac-cat--exhibit { background: var(--ac-green);        color: var(--ac-white); }

.ac-gallery-cap {
  font-size: .78rem;
  font-weight: 400;
  color: var(--ac-text-light);
  line-height: 1.55;
  text-align: center;
}

/* アップロード済み画像用 */
.ac-gallery-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ノート */
.ac-gallery-note {
  font-size: .78rem;
  color: var(--ac-text-muted);
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
}
.ac-gallery-note i { color: var(--ac-navy-light); }


/* ==============================
   9. Publications Section
   ============================== */
.ac-pub-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-bottom: 40px;
}

.ac-pub-card {
  background: var(--ac-white);
  border: 1px solid var(--ac-gray-200);
  border-radius: var(--ac-r-xl);
  overflow: hidden;
  box-shadow: var(--ac-sh-sm);
  transition: transform .26s var(--ac-ease), box-shadow .26s var(--ac-ease);
  display: flex;
  flex-direction: column;
}
.ac-pub-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--ac-sh-lg);
}

/* 画像なしカード */
.ac-pub-card--no-img {
  border-top: 3px solid var(--ac-navy);
}
.ac-pub-card--no-img .ac-pub-body {
  padding-top: 26px;
}

.ac-pub-img-wrap {
  background: var(--ac-gray-100);
  height: 260px;          /* 全カード共通の固定高さ */
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  flex-shrink: 0;         /* テキスト量で圧縮されないよう固定 */
}

.ac-pub-img-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  color: var(--ac-gray-400);
  font-size: .78rem;
  letter-spacing: .04em;
}
.ac-pub-img-placeholder i { font-size: 2.4rem; opacity: .4; }

/* 書影写真（全体表示・contain）*/
.ac-pub-img-wrap--book {
  background: #fff;
  padding: 12px;
  box-sizing: border-box;
}
.ac-pub-book-img {
  width: 100%;
  height: 100%;            /* 親の固定高さに合わせて伸縮 */
  object-fit: contain;
  object-position: center center;
  display: block;
  transition: transform .3s var(--ac-ease);
}
.ac-pub-img-wrap--book:hover .ac-pub-book-img {
  transform: scale(1.04);
}

.ac-pub-body {
  padding: 22px 22px 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.ac-pub-type {
  display: inline-block;
  font-size: .62rem;
  font-weight: 600;
  letter-spacing: .12em;
  color: var(--ac-navy-light);
  background: var(--ac-navy-pale);
  border-radius: 999px;
  padding: 3px 12px;
  align-self: flex-start;
}
.ac-pub-type--journal {
  background: rgba(27,122,64,.1);
  color: var(--ac-green);
}

.ac-pub-title {
  font-family: var(--ac-font-serif);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--ac-navy);
  line-height: 1.45;
}
.ac-pub-title small {
  font-size: .8em;
  font-weight: 400;
  color: var(--ac-text-light);
}

.ac-pub-desc {
  font-size: .84rem;
  font-weight: 300;
  color: var(--ac-text-mid);
  line-height: 1.95;
  flex: 1;
}

.ac-pub-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-top: 12px;
  border-top: 1px solid var(--ac-gray-100);
}

.ac-pub-meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: .75rem;
  color: var(--ac-text-muted);
}
.ac-pub-meta-item i { font-size: .72rem; color: var(--ac-navy-light); }

/* 引用ボックス */
.ac-pub-note {
  display: flex;
  align-items: flex-start;
  gap: 18px;
  background: var(--ac-navy-pale);
  border-left: 4px solid var(--ac-navy);
  border-radius: 0 var(--ac-r-lg) var(--ac-r-lg) 0;
  padding: 24px 28px;
}

.ac-pub-note-icon {
  font-size: 1.6rem;
  color: var(--ac-navy-light);
  opacity: .35;
  flex-shrink: 0;
  margin-top: 2px;
}

.ac-pub-note p {
  font-size: .88rem;
  font-weight: 300;
  color: var(--ac-text-mid);
  line-height: 2;
}
.ac-pub-note sup {
  font-size: .52em;
  vertical-align: super;
  line-height: 0;
}


/* ==============================
   10. Awards Section
   ============================== */
.ac-awards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(20px, 3.5vw, 32px);
}

.ac-award-card {
  position: relative;
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.1);
  border-top: 3px solid var(--ac-gold);
  border-radius: var(--ac-r-xl);
  padding: clamp(22px, 3.5vw, 32px) clamp(20px, 3vw, 28px) clamp(22px, 3.5vw, 32px);
  display: flex;
  flex-direction: column;
  gap: 16px;
  transition: background .25s, box-shadow .25s;
  overflow: hidden;
}
.ac-award-card:hover {
  background: rgba(255,255,255,.07);
  box-shadow: 0 8px 32px rgba(0,0,0,.3);
}

/* 年バッジ */
.ac-award-year-badge {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.ac-award-year {
  display: block;
  font-family: var(--ac-font-serif);
  font-size: clamp(2.2rem, 4vw, 3rem);
  font-weight: 600;
  color: var(--ac-gold-bright);
  line-height: 1;
  letter-spacing: -.02em;
}

.ac-award-month {
  font-size: .68rem;
  font-weight: 400;
  letter-spacing: .14em;
  color: rgba(255,255,255,.32);
  text-transform: uppercase;
}

.ac-award-body {
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex: 1;
}

.ac-award-org {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: .74rem;
  font-weight: 500;
  color: rgba(255,255,255,.48);
  letter-spacing: .03em;
  line-height: 1.6;
}
.ac-award-org i {
  font-size: .8rem;
  color: var(--ac-gold-light);
  flex-shrink: 0;
}

.ac-award-title {
  font-family: var(--ac-font-serif);
  font-size: clamp(.9rem, 1.6vw, 1.05rem);
  font-weight: 600;
  color: var(--ac-white);
  line-height: 1.55;
  letter-spacing: -.01em;
}

.ac-award-name {
  display: inline-block;
  font-size: .76rem;
  font-weight: 600;
  letter-spacing: .08em;
  color: var(--ac-gold-bright);
  background: rgba(242,196,74,.1);
  border: 1px solid rgba(242,196,74,.2);
  border-radius: 999px;
  padding: 4px 14px;
  align-self: flex-start;
}

.ac-award-desc {
  font-size: .83rem;
  font-weight: 300;
  color: rgba(255,255,255,.58);
  line-height: 1.95;
}

/* 写真スペース */
.ac-award-photo-wrap {
  margin-top: auto;
  padding-top: 14px;
  border-top: 1px solid rgba(255,255,255,.08);
}

.ac-award-photo-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  aspect-ratio: 4 / 3;
  background: rgba(255,255,255,.04);
  border: 1px dashed rgba(255,255,255,.15);
  border-radius: var(--ac-r-md);
  color: rgba(255,255,255,.28);
  font-size: .73rem;
  letter-spacing: .04em;
  text-align: center;
  line-height: 1.6;
}
.ac-award-photo-placeholder i { font-size: 1.8rem; opacity: .4; }

/* アップロード済み写真（imgタグ直接配置） */
.ac-award-photo-wrap img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: var(--ac-r-md);
}

/* figure要素で配置された授賞式写真 */
.ac-award-photo-fig {
  margin: 0;
}

.ac-award-photo-img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  object-position: center top;
  border-radius: var(--ac-r-md);
  box-shadow: 0 4px 16px rgba(0,0,0,.35);
  display: block;
  transition: transform .3s var(--ac-ease);
}
.ac-award-photo-img:hover {
  transform: scale(1.02);
}

.ac-award-photo-cap {
  font-size: .72rem;
  font-weight: 400;
  color: rgba(255,255,255,.45);
  text-align: center;
  line-height: 1.6;
  margin-top: 8px;
  letter-spacing: .03em;
}

/* リボンアイコン */
.ac-award-ribbon {
  position: absolute;
  top: 14px;
  right: 14px;
  font-size: 1.4rem;
  color: var(--ac-gold-light);
  opacity: .2;
  pointer-events: none;
}


/* ==============================
   11. Timeline Section
   ============================== */
.ac-timeline {
  display: flex;
  flex-direction: column;
  gap: clamp(36px, 5vw, 52px);
  position: relative;
}

/* 縦線 */
.ac-timeline::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 78px;
  width: 2px;
  background: linear-gradient(to bottom, var(--ac-gray-200), var(--ac-gray-100));
  border-radius: 2px;
}

.ac-tl-group {
  display: grid;
  grid-template-columns: 158px 1fr;
  gap: 0;
  align-items: start;
}

.ac-tl-year-col {
  display: flex;
  justify-content: center;
  padding-top: 4px;
  position: sticky;
  top: calc(var(--ac-header-h) + 20px);
}

.ac-tl-year-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 70px;
  height: 70px;
  background: var(--ac-navy);
  color: var(--ac-white);
  font-family: var(--ac-font-serif);
  font-size: .95rem;
  font-weight: 600;
  letter-spacing: .02em;
  border-radius: 50%;
  box-shadow: var(--ac-sh-md);
  position: relative;
  z-index: 1;
  flex-shrink: 0;
}

.ac-tl-year-badge--highlight {
  background: linear-gradient(135deg, var(--ac-gold) 0%, var(--ac-gold-mid) 100%);
  box-shadow: 0 4px 18px rgba(184,134,11,.35);
}

.ac-tl-year-badge--latest {
  background: var(--ac-green);
  box-shadow: 0 4px 18px rgba(27,122,64,.3);
}

.ac-tl-items-col {
  padding-left: clamp(20px, 3vw, 36px);
  display: flex;
  flex-direction: column;
  gap: 18px;
}

/* タイムラインアイテム */
.ac-tl-item {
  background: var(--ac-white);
  border: 1px solid var(--ac-gray-200);
  border-radius: var(--ac-r-xl);
  padding: clamp(18px, 3vw, 26px);
  box-shadow: var(--ac-sh-xs);
  position: relative;
  transition: box-shadow .25s, transform .25s;
}
.ac-tl-item:hover {
  box-shadow: var(--ac-sh-md);
  transform: translateX(4px);
}

/* コネクタドット */
.ac-tl-item::before {
  content: "";
  position: absolute;
  left: -28px;
  top: 26px;
  width: 10px;
  height: 10px;
  background: var(--ac-gray-300);
  border: 2px solid var(--ac-white);
  border-radius: 50%;
  box-shadow: 0 0 0 1px var(--ac-gray-300);
}

.ac-tl-item--itu::before    { background: var(--ac-navy-light); box-shadow: 0 0 0 1px var(--ac-navy-light); }
.ac-tl-item--africa::before { background: var(--ac-green);      box-shadow: 0 0 0 1px var(--ac-green); }

.ac-tl-item-header {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}

/* カテゴリバッジ */
.ac-tl-cat-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: .65rem;
  font-weight: 600;
  letter-spacing: .1em;
  padding: 3px 11px;
  border-radius: 999px;
}

.ac-tl-cat--itu {
  background: var(--ac-navy-pale);
  color: var(--ac-navy-light);
}
.ac-tl-cat--ticad {
  background: var(--ac-green-pale);
  color: var(--ac-green);
}
.ac-tl-cat--battery {
  background: rgba(99,114,130,.1);
  color: var(--ac-gray-600);
}
/* APT（アジア・太平洋電気通信共同体）バッジ */
.ac-tl-cat--apt {
  background: rgba(180,100,20,.1);
  color: #B46414;
  border: 1px solid rgba(180,100,20,.2);
}
/* PTCJ賞バッジ */
.ac-tl-cat--ptcj {
  background: rgba(184,134,11,.12);
  color: var(--ac-gold);
  border: 1px solid rgba(184,134,11,.3);
}
/* 横長写真（現地調査など横長コンポジット画像）*/
.ac-tl-featured-img--wide {
  aspect-ratio: 16 / 9;
  object-fit: cover;
  object-position: center center;
}

.ac-tl-date {
  font-size: .75rem;
  font-weight: 300;
  color: var(--ac-text-muted);
  letter-spacing: .04em;
  margin-left: auto;
}

.ac-tl-title {
  font-family: var(--ac-font-serif);
  font-size: .98rem;
  font-weight: 600;
  color: var(--ac-navy);
  line-height: 1.5;
  margin-bottom: 4px;
}

.ac-tl-org {
  font-size: .78rem;
  font-weight: 400;
  color: var(--ac-text-muted);
  letter-spacing: .03em;
  margin-bottom: 10px;
}

.ac-tl-desc {
  font-size: .85rem;
  font-weight: 300;
  color: var(--ac-text-mid);
  line-height: 1.95;
  margin-bottom: 0;
}

/* 写真スペース */
.ac-tl-photo-wrap {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--ac-gray-100);
}

.ac-tl-photo-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  aspect-ratio: 16 / 6;
  background: var(--ac-gray-50);
  border: 1px dashed var(--ac-gray-300);
  border-radius: var(--ac-r-md);
  color: var(--ac-text-muted);
  font-size: .74rem;
  letter-spacing: .04em;
}
.ac-tl-photo-placeholder i { font-size: 1.1rem; opacity: .5; }

/* アップロード済み写真 */
.ac-tl-photo-wrap img {
  width: 100%;
  aspect-ratio: 16 / 6;
  object-fit: cover;
  border-radius: var(--ac-r-md);
}

/* タイムライン外部リンク */
.ac-tl-ext-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 10px;
  padding: 5px 12px;
  font-size: .78rem;
  font-weight: 600;
  color: var(--ac-navy);
  background: var(--ac-gray-50);
  border: 1px solid var(--ac-navy);
  border-radius: 20px;
  text-decoration: none;
  transition: background .2s, color .2s;
}
.ac-tl-ext-link:hover {
  background: var(--ac-navy);
  color: #fff;
}


/* ======================================================
   11.5 Featured Timeline Item（フィーチャード強調アイテム）
   ITUテレコムワールド等、国際機関関連の特別強調表示
   ====================================================== */

/* ── アイテム全体の強調フレーム ── */
.ac-tl-item--featured {
  border-top: 3px solid var(--ac-gold);
  background: linear-gradient(135deg, var(--ac-white) 0%, var(--ac-gold-pale) 100%);
  box-shadow: var(--ac-sh-md), 0 0 0 1px rgba(184,134,11,.12);
  position: relative;
}
.ac-tl-item--featured::before {
  background: var(--ac-gold) !important;
  box-shadow: 0 0 0 3px rgba(184,134,11,.22), 0 0 12px rgba(184,134,11,.25) !important;
}

/* ── 「受賞年」カテゴリバッジ（金色） ── */
.ac-tl-cat--featured {
  background: var(--ac-gold-pale);
  color: var(--ac-gold);
  border: 1px solid rgba(184,134,11,.3);
}
.ac-tl-cat--featured i { color: var(--ac-gold-light); }

/* ── メタ情報バッジ行 ── */
.ac-tl-meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
}

.ac-tl-meta-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: .72rem;
  font-weight: 500;
  letter-spacing: .03em;
  background: var(--ac-navy-pale);
  color: var(--ac-navy-light);
  border: 1px solid rgba(28,72,128,.15);
  border-radius: 999px;
  padding: 4px 12px;
  line-height: 1.4;
}
.ac-tl-meta-badge i {
  font-size: .7rem;
  opacity: .75;
}

/* 金色バッジ（受賞関連） */
.ac-tl-meta-badge--gold {
  background: var(--ac-gold-pale);
  color: var(--ac-gold);
  border: 1px solid rgba(184,134,11,.25);
  font-weight: 600;
}
.ac-tl-meta-badge--gold i { opacity: 1; color: var(--ac-gold-light); }

/* ── 写真 + テキスト 横並びレイアウト ── */
.ac-tl-featured-body {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 28px;
  align-items: start;
  margin-top: 6px;
}

/* ── 写真ブロック ── */
.ac-tl-featured-fig {
  margin: 0;
  flex-shrink: 0;
}

.ac-tl-featured-img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: var(--ac-r-lg);
  box-shadow: var(--ac-sh-sm), 0 0 0 2px rgba(184,134,11,.15);
  display: block;
  transition: transform .3s var(--ac-ease), box-shadow .3s var(--ac-ease);
}
.ac-tl-featured-img:hover {
  transform: scale(1.02);
  box-shadow: var(--ac-sh-md), 0 0 0 2px rgba(184,134,11,.25);
}

.ac-tl-featured-cap {
  font-size: .78rem;
  font-weight: 400;
  color: var(--ac-text-light);
  line-height: 1.7;
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px solid rgba(184,134,11,.18);
  text-align: center;
}

.ac-tl-featured-cap-sub {
  display: block;
  font-size: .7rem;
  color: var(--ac-text-muted);
  margin-top: 3px;
  letter-spacing: .02em;
}

/* ── テキストブロック ── */
.ac-tl-featured-text {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.ac-tl-featured-text .ac-tl-desc {
  font-size: .88rem;
  line-height: 2.0;
  color: var(--ac-text-mid);
}
.ac-tl-featured-text .ac-tl-desc strong {
  color: var(--ac-navy-light);
  font-weight: 700;
}

/* ── 詳細リンクボタン ── */
.ac-tl-detail-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: .83rem;
  font-weight: 600;
  letter-spacing: .04em;
  color: var(--ac-navy-light);
  background: transparent;
  border: 1.5px solid var(--ac-navy-light);
  border-radius: 999px;
  padding: 9px 22px;
  margin-top: 4px;
  align-self: flex-start;
  text-decoration: none;
  transition: background .22s var(--ac-ease), color .22s var(--ac-ease),
              border-color .22s var(--ac-ease), box-shadow .22s var(--ac-ease);
}
.ac-tl-detail-link i {
  font-size: .76rem;
  opacity: .8;
  transition: transform .2s var(--ac-ease);
}
.ac-tl-detail-link:hover {
  background: var(--ac-navy);
  color: var(--ac-white);
  border-color: var(--ac-navy);
  box-shadow: 0 4px 16px rgba(12,35,64,.22);
}
.ac-tl-detail-link:hover i {
  opacity: 1;
  transform: translateX(3px);
}


/* ======================================================
   11.6 展示テーマブロック（.ac-tl-themes）
   各年のITU Telecom World展示テーマを見やすく整理
   ====================================================== */

/* ── ブロック全体 ── */
.ac-tl-themes {
  margin-top: 16px;
  padding: 18px 20px 18px 20px;
  background: #FFFFFF;
  border: 1px solid var(--ac-gray-200);
  border-left: 3px solid var(--ac-green);
  border-radius: var(--ac-r-md);
  box-shadow: 0 1px 6px rgba(0,0,0,.05);
}

/* ── ラベル（「展示テーマ」見出し） ── */
.ac-tl-themes-label {
  display: flex;
  align-items: center;
  gap: 7px;
  font-family: var(--ac-font-serif);
  font-size: .76rem;
  font-weight: 600;
  letter-spacing: .13em;
  color: var(--ac-green);
  text-transform: uppercase;
  margin-bottom: 12px;
}
.ac-tl-themes-label i {
  font-size: .78rem;
  opacity: .85;
  flex-shrink: 0;
}

/* ── テーマ箇条書きリスト ── */
.ac-tl-themes-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 9px;
}

.ac-tl-themes-list li {
  display: flex;
  align-items: flex-start;
  gap: 9px;
  font-family: var(--ac-font-sans);
  font-size: .84rem;
  font-weight: 300;
  color: var(--ac-text-mid);
  line-height: 1.75;
}

/* グリーンのダイヤマーカー */
.ac-tl-themes-list li::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  min-width: 6px;
  background: var(--ac-green);
  border-radius: 1px;
  transform: rotate(45deg);
  margin-top: .55em;
  opacity: .75;
}

/* ── featured内（濃い背景）での調整 ── */
.ac-tl-featured-text .ac-tl-themes {
  background: rgba(255,255,255,.82);
  border-color: rgba(28,122,64,.22);
  border-left-color: var(--ac-green);
}
.ac-tl-featured-text .ac-tl-themes-list li {
  color: var(--ac-text-mid);
}

/* ── photo-wrap内（2019年スタイル）での調整 ── */
.ac-tl-photo-wrap .ac-tl-themes {
  margin-top: 16px;
}

/* ── レスポンシブ（640px以下） ── */
@media (max-width: 640px) {
  .ac-tl-themes {
    padding: 14px 16px;
  }
  .ac-tl-themes-list li {
    font-size: .82rem;
  }
}


/* ==============================
   12. Conclusion Section
   ============================== */
.ac-conclusion-block {
  text-align: center;
  max-width: 760px;
  margin: 0 auto;
}

.ac-conclusion-deco {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  margin-bottom: 28px;
}

.ac-conclusion-line {
  flex: 1;
  max-width: 110px;
  height: 1px;
  background: linear-gradient(to right, transparent, rgba(255,255,255,.18));
}
.ac-conclusion-line:last-child {
  background: linear-gradient(to left, transparent, rgba(255,255,255,.18));
}

.ac-conclusion-icon {
  font-size: 2.2rem;
  color: var(--ac-gold-bright);
  opacity: .7;
}

.ac-conclusion-label {
  font-family: var(--ac-font-serif);
  font-size: clamp(.78rem, 1.3vw, .92rem);
  font-weight: 400;
  letter-spacing: .22em;
  color: rgba(255,255,255,.36);
  margin-bottom: 24px;
}

.ac-conclusion-text {
  font-family: var(--ac-font-serif);
  font-size: clamp(1.1rem, 2.6vw, 1.6rem);
  font-weight: 500;
  color: rgba(255,255,255,.9);
  line-height: 2.1;
  margin-bottom: 36px;
  letter-spacing: -.01em;
}
.ac-conclusion-text strong {
  color: #B0D9BC;
  font-weight: 700;
  border-bottom: 1px solid rgba(176,217,188,.3);
  padding-bottom: 2px;
}

.ac-conclusion-points {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-bottom: 44px;
}

.ac-conclusion-point {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: .83rem;
  font-weight: 400;
  color: rgba(255,255,255,.72);
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.13);
  border-radius: 999px;
  padding: 8px 20px;
}
.ac-conclusion-point i {
  color: var(--ac-gold-light);
  font-size: .86rem;
}

.ac-cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--ac-green);
  color: var(--ac-white);
  font-size: .9rem;
  font-weight: 600;
  letter-spacing: .06em;
  padding: 14px 40px;
  border-radius: 999px;
  box-shadow: 0 4px 20px rgba(27,122,64,.4);
  transition: background .24s, transform .2s, box-shadow .24s;
  text-decoration: none;
}
.ac-cta-btn:hover {
  background: var(--ac-green-mid);
  transform: translateY(-3px);
  box-shadow: 0 10px 30px rgba(27,122,64,.5);
}
.ac-cta-btn i { font-size: .86rem; }


/* ==============================
   13. Footer
   ============================== */
.ac-footer {
  background: var(--ac-gray-900);
  padding: 40px 0;
  border-top: 1px solid rgba(255,255,255,.05);
}

.ac-footer-inner {
  max-width: var(--ac-container);
  margin: 0 auto;
  padding: 0 clamp(20px, 5vw, 52px);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  text-align: center;
}

.ac-footer-company {
  font-size: .88rem;
  font-weight: 500;
  color: rgba(255,255,255,.68);
  letter-spacing: .08em;
}

.ac-footer-nav {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  justify-content: center;
}
.ac-footer-nav a {
  font-size: .75rem;
  font-weight: 300;
  color: rgba(255,255,255,.36);
  letter-spacing: .04em;
  transition: color .2s;
}
.ac-footer-nav a:hover { color: rgba(255,255,255,.7); }

.ac-footer-trademark {
  font-size: .7rem;
  font-weight: 300;
  color: rgba(255,255,255,.28);
  letter-spacing: .03em;
}

.ac-footer-copy {
  font-size: .68rem;
  color: rgba(255,255,255,.2);
}


/* ==============================
   13b. Deployment Section（導入実績）
   ============================== */

/* ==============================
   13c. Summary Cards（文献・表彰・発表実績まとめ）
   ============================== */
.ac-summary-cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 8px;
}

.ac-summary-card {
  background: var(--ac-white);
  border: 1px solid var(--ac-gray-200);
  border-radius: var(--ac-r-xl);
  padding: 32px 24px 28px;
  text-align: center;
  box-shadow: var(--ac-sh-xs);
  transition: transform .26s var(--ac-ease), box-shadow .26s var(--ac-ease);
}
.ac-summary-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--ac-sh-lg);
}

.ac-summary-card-icon {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin: 0 auto 20px;
}
.ac-summary-card-icon--navy {
  background: var(--ac-navy-pale);
  color: var(--ac-navy-light);
}
.ac-summary-card-icon--gold {
  background: var(--ac-gold-pale);
  color: var(--ac-gold);
}
.ac-summary-card-icon--green {
  background: var(--ac-green-pale);
  color: var(--ac-green);
}

.ac-summary-card-title {
  font-family: var(--ac-font-serif);
  font-size: 1rem;
  font-weight: 700;
  color: var(--ac-navy);
  margin-bottom: 12px;
  line-height: 1.4;
}

.ac-summary-card-text {
  font-size: .83rem;
  font-weight: 300;
  color: var(--ac-text-light);
  line-height: 1.9;
}

/* レスポンシブ */
@media (max-width: 960px) {
  .ac-summary-cards { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .ac-summary-cards { grid-template-columns: 1fr; gap: 16px; }
}


/* リード文 */
.ac-deploy-lead {
  max-width: 820px;
  margin: 0 auto 52px;
  text-align: center;
}
.ac-deploy-lead p {
  font-size: .95rem;
  font-weight: 300;
  color: var(--ac-text-mid);
  line-height: 2.15;
}

/* 適用分野グリッド */
.ac-deploy-sectors {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 52px;
}

.ac-deploy-sector {
  background: var(--ac-white);
  border: 1px solid var(--ac-gray-200);
  border-top: 3px solid var(--ac-navy);
  border-radius: var(--ac-r-xl);
  padding: 28px 22px 26px;
  text-align: center;
  box-shadow: var(--ac-sh-xs);
  transition: transform .26s var(--ac-ease), box-shadow .26s var(--ac-ease);
}
.ac-deploy-sector:hover {
  transform: translateY(-4px);
  box-shadow: var(--ac-sh-lg);
}

.ac-deploy-sector-icon {
  width: 56px;
  height: 56px;
  background: var(--ac-navy-pale);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--ac-navy-light);
  font-size: 1.3rem;
  margin: 0 auto 18px;
}

.ac-deploy-sector-title {
  font-family: var(--ac-font-serif);
  font-size: .95rem;
  font-weight: 700;
  color: var(--ac-navy);
  margin-bottom: 10px;
  line-height: 1.4;
}

.ac-deploy-sector-text {
  font-size: .82rem;
  font-weight: 300;
  color: var(--ac-text-light);
  line-height: 1.85;
}

/* 導入事例エリア */
.ac-deploy-cases {
  background: var(--ac-gray-50);
  border: 1px solid var(--ac-gray-200);
  border-radius: var(--ac-r-xl);
  padding: clamp(28px, 4vw, 44px);
}

.ac-deploy-cases-header {
  display: flex;
  align-items: baseline;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 24px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--ac-gray-200);
}

.ac-deploy-cases-title {
  font-family: var(--ac-font-serif);
  font-size: 1rem;
  font-weight: 700;
  color: var(--ac-navy);
  display: flex;
  align-items: center;
  gap: 9px;
}
.ac-deploy-cases-title i { color: var(--ac-navy-light); font-size: .9rem; }

.ac-deploy-cases-note {
  font-size: .78rem;
  font-weight: 300;
  color: var(--ac-text-muted);
  letter-spacing: .03em;
}

/* プレースホルダーグリッド（写真・事例追加スペース） */
.ac-deploy-cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

.ac-deploy-case-placeholder {
  aspect-ratio: 4 / 3;
  background: var(--ac-white);
  border: 1px dashed var(--ac-gray-300);
  border-radius: var(--ac-r-lg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  color: var(--ac-gray-400);
  font-size: .78rem;
  letter-spacing: .04em;
  text-align: center;
  line-height: 1.6;
  transition: background .2s, border-color .2s;
}
.ac-deploy-case-placeholder:hover {
  background: var(--ac-gray-25);
  border-color: var(--ac-gray-400);
}
.ac-deploy-case-placeholder i { font-size: 1.6rem; opacity: .3; }

/* メッセージ */
.ac-deploy-cases-message {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  font-size: .84rem;
  font-weight: 300;
  color: var(--ac-text-light);
}
.ac-deploy-cases-message i { color: var(--ac-navy-light); font-size: .82rem; }

.ac-deploy-contact-link {
  color: var(--ac-green);
  text-decoration: underline;
  text-decoration-color: rgba(27,122,64,.35);
  font-weight: 500;
  transition: color .2s;
}
.ac-deploy-contact-link:hover { color: var(--ac-green-mid); }


/* ==============================
   14. Responsive — ≤960px
   ============================== */
@media (max-width: 960px) {
  .ac-header-nav { display: none; }
  .ac-header-company { display: none; }

  .ac-hero-stats { gap: 20px; }

  .ac-gallery-grid { grid-template-columns: repeat(3, 1fr); }

  .ac-pub-grid        { grid-template-columns: repeat(2, 1fr); }
  .ac-awards-grid     { grid-template-columns: 1fr; gap: 24px; }
  .ac-deploy-sectors  { grid-template-columns: repeat(2, 1fr); }
  .ac-deploy-cases-grid { grid-template-columns: repeat(2, 1fr); }

  /* タイムライン */
  .ac-tl-group { grid-template-columns: 100px 1fr; }
  .ac-timeline::before { left: 49px; }
  .ac-tl-year-badge { width: 58px; height: 58px; font-size: .82rem; }

  .ac-br-sp { display: block; }
  .ac-br-pc { display: inline; }

  /* フィーチャードアイテム ≤960px：写真幅を縮小 */
  .ac-tl-featured-body {
    grid-template-columns: 220px 1fr;
    gap: 20px;
  }
}


/* ==============================
   15. Responsive — ≤640px
   ============================== */
@media (max-width: 640px) {
  .ac-hero-stats { gap: 14px; }
  .ac-stat-div   { height: 32px; }

  .ac-lead-block { flex-direction: column; gap: 16px; }
  .ac-lead-deco  { width: 44px; height: 44px; font-size: 1.1rem; }

  .ac-gallery-grid { grid-template-columns: repeat(2, 1fr); }

  .ac-pub-grid          { grid-template-columns: 1fr; }
  .ac-deploy-sectors    { grid-template-columns: 1fr 1fr; gap: 14px; }
  .ac-deploy-cases-grid { grid-template-columns: 1fr; }

  /* タイムライン：1カラム */
  .ac-tl-group { grid-template-columns: 1fr; }
  .ac-tl-year-col { position: static; justify-content: flex-start; margin-bottom: 14px; }
  .ac-timeline::before { display: none; }
  .ac-tl-item::before  { display: none; }
  .ac-tl-items-col { padding-left: 0; }

  /* フィーチャードアイテム ≤640px：写真を上、テキストを下の縦並びに */
  .ac-tl-featured-body {
    grid-template-columns: 1fr;
    gap: 18px;
  }
  .ac-tl-featured-img {
    aspect-ratio: 16 / 9;
  }
  .ac-tl-detail-link {
    align-self: stretch;
    justify-content: center;
  }

  .ac-header-back span { display: none; }

  .ac-conclusion-points { flex-direction: column; align-items: center; }
}


/* ==============================
   16. Responsive — ≤400px
   ============================== */
@media (max-width: 400px) {
  .ac-gallery-grid { grid-template-columns: 1fr; }
  .ac-hero-stats   { flex-direction: column; align-items: flex-start; gap: 14px; }
  .ac-stat-div     { display: none; }
}