/* ============================================
   HOMEページ専用スタイル
   ============================================ */

/* --- ファーストビュー --- */
.hero {
  position: relative;
  height: 100vh;
  min-height: 640px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: url('../images/hero-bridge.jpg') center/cover no-repeat;
  transform: scale(1.06);
  animation: heroZoom 14s ease-in-out infinite alternate;
}
@keyframes heroZoom {
  from { transform: scale(1.06); }
  to   { transform: scale(1.0); }
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(10, 18, 38, .88) 0%,
    rgba(15, 31, 61, .78) 50%,
    rgba(26, 47, 82, .65) 100%
  );
}

/* 信頼バッジ */
.hero-badges {
  position: absolute;
  top: 100px;
  left: 0;
  right: 0;
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  padding: 0 40px;
  z-index: 2;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .08em;
  color: rgba(255,255,255,.82);
  background: rgba(255,255,255,.1);
  border: 1px solid rgba(255,255,255,.18);
  padding: 5px 14px;
  border-radius: 2px;
  backdrop-filter: blur(4px);
}
.hero-badge i { color: #6baed6; font-size: 10px; }

/* ヒーローコンテンツ */
.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 900px;
  padding: 0 40px;
}
.hero-label {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  font-family: var(--font-en);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .2em;
  color: rgba(255,255,255,.55);
  margin-bottom: 24px;
}
.hero-label-line {
  display: block;
  width: 36px;
  height: 1px;
  background: rgba(255,255,255,.4);
}
.hero-title {
  font-size: clamp(28px, 5vw, 56px);
  font-weight: 900;
  color: var(--color-white);
  letter-spacing: .04em;
  line-height: 1.4;
  margin-bottom: 24px;
}
.hero-title-accent {
  color: #6baed6;
  display: block;
}
.hero-sub {
  font-size: clamp(13px, 1.6vw, 16px);
  color: rgba(255,255,255,.75);
  line-height: 2;
  margin-bottom: 40px;
}
.hero-cta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
}

/* スクロールインジケーター */
.hero-scroll {
  position: absolute;
  bottom: 36px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  z-index: 2;
}
.hero-scroll span {
  font-family: var(--font-en);
  font-size: 9px;
  font-weight: 600;
  letter-spacing: .3em;
  color: rgba(255,255,255,.45);
}
.hero-scroll-bar {
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, rgba(255,255,255,.4), transparent);
  animation: scrollBar 2s ease-in-out infinite;
}
@keyframes scrollBar {
  0%   { opacity: .3; transform: scaleY(.5) translateY(-10px); }
  50%  { opacity: 1;  transform: scaleY(1)  translateY(0); }
  100% { opacity: .3; transform: scaleY(.5) translateY(10px); }
}

/* --- 導入メッセージ --- */
.intro-section {
  padding: 110px 0;
  background: var(--color-white);
}
.intro-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}
.intro-img-wrap {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}
.intro-img-wrap img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
}
.intro-img-badge {
  position: absolute;
  bottom: 24px;
  right: 24px;
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--color-blue);
  color: var(--color-white);
  font-size: 12px;
  font-weight: 600;
  padding: 10px 18px;
  border-radius: var(--radius-md);
  letter-spacing: .06em;
  box-shadow: var(--shadow-md);
}

/* --- 3つの強み --- */
.features-section {
  padding: 100px 0;
  background: var(--color-offwhite);
  position: relative;
}
.features-section::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-blue), var(--color-blue-light), var(--color-steel));
}
.section-head { margin-bottom: 56px; }
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.feature-card {
  background: var(--color-white);
  border: 1px solid var(--color-lightgray);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  position: relative;
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
}
.feature-card::before {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-blue), var(--color-blue-light));
  transition: width .4s ease;
}
.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}
.feature-card:hover::before { width: 100%; }

.feature-icon-wrap {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 24px;
}
.feature-icon {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--color-blue), var(--color-steel));
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  color: var(--color-white);
}
.feature-num {
  font-family: var(--font-en);
  font-size: 42px;
  font-weight: 800;
  color: rgba(0,0,0,.05);
  line-height: 1;
}
.feature-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-navy);
  margin-bottom: 14px;
  line-height: 1.5;
}
.feature-text {
  font-size: 13.5px;
  color: var(--color-text-light);
  line-height: 1.9;
  margin-bottom: 20px;
}
.feature-link {
  font-size: 12.5px;
  font-weight: 600;
  color: var(--color-blue);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap var(--transition);
}
.feature-link:hover { gap: 10px; }

/* --- 事業内容ダイジェスト --- */
.services-section {
  padding: 110px 0;
  position: relative;
  overflow: hidden;
}
.services-bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(160deg, var(--color-navy) 0%, var(--color-charcoal) 60%, var(--color-steel) 100%);
}
.services-bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 59px,
      rgba(255,255,255,.025) 59px,
      rgba(255,255,255,.025) 60px
    ),
    repeating-linear-gradient(
      90deg,
      transparent,
      transparent 59px,
      rgba(255,255,255,.025) 59px,
      rgba(255,255,255,.025) 60px
    );
}
.services-section .section-label-en { color: rgba(255,255,255,.45); }
.services-section .section-label::before { background: rgba(255,255,255,.3); }
.services-section .section-divider {
  background: linear-gradient(90deg, rgba(255,255,255,.5), rgba(255,255,255,.2));
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 40px;
}
/* 3列レイアウト（3事業用） */
.services-grid-3 {
  grid-template-columns: repeat(3, 1fr);
}
/* works 3列レイアウト */
.works-grid-3 {
  grid-template-columns: repeat(3, 1fr);
}
.service-card {
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.1);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
  backdrop-filter: blur(4px);
}
.service-card:hover {
  transform: translateY(-6px);
  background: rgba(255,255,255,.1);
  box-shadow: 0 12px 40px rgba(0,0,0,.35);
}
.service-img-wrap {
  position: relative;
  overflow: hidden;
}
.service-img-wrap img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  transition: transform .5s ease;
}
.service-card:hover .service-img-wrap img { transform: scale(1.06); }
.service-img-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(10,18,38,.7) 0%, rgba(10,18,38,.2) 60%, transparent 100%);
}
.service-num {
  position: absolute;
  top: 12px;
  right: 14px;
  font-family: var(--font-en);
  font-size: 28px;
  font-weight: 800;
  color: rgba(255,255,255,.2);
  line-height: 1;
}
.service-body { padding: 20px 18px 22px; }
.service-tag {
  font-family: var(--font-en);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: .18em;
  color: #6baed6;
  display: block;
  margin-bottom: 8px;
}
.service-name {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 8px;
  line-height: 1.45;
}
.service-desc {
  font-size: 12px;
  color: rgba(255,255,255,.6);
  line-height: 1.8;
  margin-bottom: 14px;
}
.service-link {
  font-size: 11.5px;
  font-weight: 600;
  color: #6baed6;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  transition: gap var(--transition);
}
.service-link:hover { gap: 8px; }

.services-more {
  text-align: center;
}

/* --- 施工実績 --- */
.works-section {
  padding: 100px 0;
  background: var(--color-white);
}
.works-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 48px;
}
.works-card {
  background: var(--color-white);
  border: 1px solid var(--color-lightgray);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
}
.works-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.works-img {
  position: relative;
  overflow: hidden;
}
.works-img img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  transition: transform .5s ease;
}
.works-card:hover .works-img img { transform: scale(1.05); }
.works-cat {
  position: absolute;
  top: 14px;
  left: 14px;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--color-white);
  background: var(--color-blue);
  padding: 4px 10px;
  border-radius: 2px;
}
.works-body {
  padding: 18px 20px 20px;
}
.works-body h3 {
  font-size: 14.5px;
  font-weight: 700;
  color: var(--color-navy);
  margin-bottom: 8px;
  line-height: 1.5;
}
.works-body p {
  font-size: 12.5px;
  color: var(--color-text-light);
  line-height: 1.8;
}
.works-more { text-align: center; }

/* --- 安全・品質 --- */
.quality-section {
  padding: 100px 0;
  background: var(--color-offwhite);
}
.quality-inner {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 80px;
  align-items: center;
}
.quality-list {
  margin-top: 28px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.quality-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 14.5px;
  color: var(--color-text);
  font-weight: 500;
}
.quality-list li i {
  color: var(--color-blue);
  font-size: 16px;
  margin-top: 3px;
  flex-shrink: 0;
}
.quality-items {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.quality-item {
  background: var(--color-white);
  border: 1px solid var(--color-lightgray);
  border-radius: var(--radius-lg);
  padding: 32px 20px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  transition: box-shadow var(--transition);
}
.quality-item:hover { box-shadow: var(--shadow-md); }
.quality-icon {
  width: 54px;
  height: 54px;
  background: linear-gradient(135deg, var(--color-blue), var(--color-steel));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: var(--color-white);
}
.quality-item span {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-navy);
  letter-spacing: .04em;
}

/* --- 会社情報導線 --- */
.company-nav-section {
  padding: 100px 0;
  background: var(--color-white);
}
.company-nav-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.company-nav-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  padding: 40px 32px;
  background: var(--color-white);
  border: 1px solid var(--color-lightgray);
  border-radius: var(--radius-lg);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  position: relative;
  overflow: hidden;
}
.company-nav-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--color-blue), var(--color-blue-light));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .35s ease;
}
.company-nav-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(37,99,168,.2);
}
.company-nav-card:hover::before { transform: scaleX(1); }
.company-nav-icon {
  width: 52px;
  height: 52px;
  background: var(--color-offwhite);
  border: 1px solid var(--color-lightgray);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: var(--color-blue);
  margin-bottom: 20px;
}
.company-nav-card h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--color-navy);
  margin-bottom: 10px;
}
.company-nav-card p {
  font-size: 13px;
  color: var(--color-text-light);
  line-height: 1.85;
  flex: 1;
  margin-bottom: 20px;
}
.company-nav-link {
  font-size: 12.5px;
  font-weight: 600;
  color: var(--color-blue);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* --- 採用情報導線 --- */
.recruit-nav-section {
  padding: 100px 0;
  position: relative;
  overflow: hidden;
}
.recruit-nav-bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--color-charcoal) 0%, var(--color-navy) 60%, var(--color-steel) 100%);
}
.recruit-nav-bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(
      45deg,
      transparent,
      transparent 29px,
      rgba(255,255,255,.018) 29px,
      rgba(255,255,255,.018) 30px
    );
}
.recruit-nav-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.recruit-nav-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.recruit-job-card {
  background: rgba(255,255,255,.07);
  border: 1px solid rgba(255,255,255,.12);
  border-radius: var(--radius-lg);
  padding: 24px 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  text-align: center;
  transition: background var(--transition);
}
.recruit-job-card:hover { background: rgba(255,255,255,.12); }
.recruit-job-card i {
  font-size: 26px;
  color: #6baed6;
}
.recruit-job-card span {
  font-size: 12.5px;
  font-weight: 600;
  color: rgba(255,255,255,.85);
  line-height: 1.4;
}

/* --- レスポンシブ (HOME専用) --- */
@media (max-width: 1100px) {
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .services-grid-3 { grid-template-columns: repeat(3, 1fr); }
  .works-grid-3 { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 900px) {
  .intro-inner    { grid-template-columns: 1fr; gap: 40px; }
  .quality-inner  { grid-template-columns: 1fr; gap: 40px; }
  .recruit-nav-inner { grid-template-columns: 1fr; gap: 40px; }
}

@media (max-width: 768px) {
  .hero-badges    { top: 80px; gap: 6px; }
  .hero-badge     { font-size: 9.5px; padding: 4px 10px; }
  .hero-content   { padding: 0 20px; }
  .features-grid  { grid-template-columns: 1fr; }
  .services-grid  { grid-template-columns: repeat(2, 1fr); }
  .services-grid-3 { grid-template-columns: 1fr; }
  .works-grid     { grid-template-columns: repeat(2, 1fr); }
  .works-grid-3   { grid-template-columns: 1fr; }
  .company-nav-grid { grid-template-columns: 1fr; }
  .recruit-nav-cards { grid-template-columns: 1fr 1fr; }
  .quality-items  { grid-template-columns: 1fr 1fr; }
  .pc-only        { display: none; }
}

@media (max-width: 480px) {
  .services-grid  { grid-template-columns: 1fr; }
  .services-grid-3 { grid-template-columns: 1fr; }
  .works-grid     { grid-template-columns: 1fr; }
  .works-grid-3   { grid-template-columns: 1fr; }
  .recruit-nav-cards { grid-template-columns: 1fr; }
}