/* ============================================
   Stella Knowledge Storehouse
   トップページ専用スタイル
   ============================================ */

/* ----- ヒーローセクション ----- */
.hero {
  position: relative;
  min-height: calc(100vh - var(--header-height));
  display: flex;
  align-items: center;
  background: linear-gradient(180deg, #fafbfc 0%, #ffffff 100%);
  overflow: hidden;
  padding: 80px 0;
}

/* 背景の技術的な装飾(SVGグリッド) */
.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  opacity: 0.4;
}

.hero-bg svg {
  width: 100%;
  height: 100%;
}

.hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 56px;
  align-items: center;
  width: 100%;
}

.hero-text {
  position: relative;
  z-index: 2;
}

.hero-visual {
  position: relative;
  aspect-ratio: 1;
  max-width: 420px;
  margin-left: auto;
  opacity: 0;
  animation: fadeIn 1.2s 0.6s ease forwards;
}

.hero-tagline {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-en);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.25em;
  color: var(--color-navy);
  text-transform: uppercase;
  margin-bottom: 24px;
  opacity: 0;
  animation: fadeInUp 0.8s 0.1s ease forwards;
}

.hero-tagline::before {
  content: '';
  width: 32px;
  height: 1px;
  background: var(--color-gold);
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 2.4vw, 1.8rem);
  font-weight: 600;
  line-height: 1.5;
  letter-spacing: 0.02em;
  color: var(--color-navy);
  margin-bottom: 24px;
  opacity: 0;
  animation: fadeInUp 0.8s 0.25s ease forwards;
  white-space: nowrap;
}

@media (max-width: 968px) {
  .hero-title {
    white-space: normal;
    font-size: clamp(1.5rem, 5vw, 2rem);
  }
}

.hero-title .highlight {
  display: inline-block;
  position: relative;
}

.hero-title .highlight::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 8px;
  background: rgba(255, 192, 0, 0.3);
  z-index: -1;
}

.hero-subtitle {
  font-size: 1.05rem;
  color: var(--color-gray-700);
  line-height: 2;
  margin-bottom: 40px;
  opacity: 0;
  animation: fadeInUp 0.8s 0.4s ease forwards;
  max-width: 540px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  opacity: 0;
  animation: fadeInUp 0.8s 0.55s ease forwards;
}

/* ヒーロービジュアル(配管の抽象表現) */
.hero-visual svg {
  width: 100%;
  height: 100%;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@media (max-width: 968px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .hero-visual {
    max-width: 360px;
    margin: 0 auto;
  }
}

@media (max-width: 768px) {
  .hero {
    min-height: auto;
    padding: 56px 0;
  }

  .hero-actions {
    flex-direction: column;
  }

  .hero-actions .btn {
    width: 100%;
    justify-content: center;
  }
}

/* ----- 強みセクション ----- */
.strengths {
  background: var(--color-white);
  position: relative;
}

.strengths-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.strength-card {
  position: relative;
  padding: 40px 32px;
  background: var(--color-gray-50);
  border: 1px solid var(--color-gray-200);
  border-radius: 4px;
  transition: var(--transition);
  overflow: hidden;
}

.strength-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--color-gold);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.5s ease;
}

.strength-card:hover {
  background: var(--color-white);
  border-color: var(--color-navy);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.strength-card:hover::before {
  transform: scaleX(1);
}

.strength-number {
  font-family: var(--font-en);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  color: var(--color-gold);
  margin-bottom: 16px;
}

.strength-title {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--color-navy);
  line-height: 1.5;
  margin-bottom: 16px;
  letter-spacing: 0.03em;
}

.strength-desc {
  font-size: 0.9rem;
  color: var(--color-gray-700);
  line-height: 1.9;
}

@media (max-width: 968px) {
  .strengths-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
}

/* ----- 事業内容セクション ----- */
.services {
  background: var(--color-gray-50);
  position: relative;
}

.services-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.service-item {
  display: grid;
  grid-template-columns: 80px 1fr auto;
  gap: 32px;
  align-items: center;
  padding: 40px 0;
  border-bottom: 1px solid var(--color-gray-200);
  transition: var(--transition);
}

.service-item:first-child {
  border-top: 1px solid var(--color-gray-200);
}

.service-item:hover {
  padding-left: 16px;
}

.service-number {
  font-family: var(--font-en);
  font-size: 2.5rem;
  font-weight: 200;
  color: var(--color-gold);
  letter-spacing: 0.05em;
  line-height: 1;
}

.service-content h3 {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--color-navy);
  margin-bottom: 8px;
  letter-spacing: 0.04em;
}

.service-content .service-en {
  font-family: var(--font-en);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  color: var(--color-gray-500);
  text-transform: uppercase;
  margin-bottom: 12px;
}

.service-content p {
  font-size: 0.9rem;
  color: var(--color-gray-700);
  line-height: 1.8;
}

.service-arrow {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-gray-300);
  border-radius: 50%;
  color: var(--color-navy);
  transition: var(--transition);
}

.service-item:hover .service-arrow {
  background: var(--color-navy);
  color: var(--color-white);
  border-color: var(--color-navy);
  transform: translateX(4px);
}

@media (max-width: 768px) {
  .service-item {
    grid-template-columns: auto 1fr;
    gap: 16px 20px;
    padding: 28px 0;
  }

  .service-item:hover {
    padding-left: 0;
  }

  .service-number {
    font-size: 1.5rem;
    grid-row: 1;
  }

  .service-arrow {
    grid-column: 2;
    grid-row: 1;
    margin-left: auto;
    width: 40px;
    height: 40px;
  }

  .service-content {
    grid-column: 1 / -1;
  }

  .service-content h3 {
    font-size: 1.15rem;
  }
}

/* ----- アバウトセクション(短い紹介) ----- */
.about-brief {
  background: var(--color-white);
  position: relative;
}

.about-brief-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.about-visual {
  position: relative;
  aspect-ratio: 4 / 5;
  background: linear-gradient(135deg, var(--color-navy) 0%, var(--color-navy-dark) 100%);
  border-radius: 4px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.about-visual::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(0deg, rgba(255, 192, 0, 0.1) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 192, 0, 0.1) 1px, transparent 1px);
  background-size: 40px 40px;
}

.about-visual-content {
  position: relative;
  text-align: center;
  color: var(--color-white);
  padding: 32px;
}

.about-visual-content .star {
  font-size: 3rem;
  color: var(--color-gold);
  margin-bottom: 16px;
  display: block;
}

.about-visual-content .number {
  font-family: var(--font-en);
  font-size: 4.5rem;
  font-weight: 200;
  line-height: 1;
  margin-bottom: 8px;
  color: var(--color-gold);
}

.about-visual-content .label {
  font-size: 0.85rem;
  letter-spacing: 0.15em;
  color: rgba(255, 255, 255, 0.85);
}

.about-text {
  position: relative;
}

.about-text p {
  font-size: 1rem;
  color: var(--color-gray-700);
  line-height: 2.1;
  margin-bottom: 20px;
}

.about-text .lead {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 500;
  color: var(--color-navy);
  line-height: 1.9;
  letter-spacing: 0.04em;
  margin-bottom: 24px;
}

.about-actions {
  margin-top: 32px;
}

@media (max-width: 968px) {
  .about-brief-inner {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .about-visual {
    max-width: 320px;
    margin: 0 auto;
    aspect-ratio: 1;
  }
}

/* CTAセクションはstyle.cssに移動 */