/* ============================================
   NAGASHIRO GROUP - IT Service Detail Page
   ============================================ */

/* --- Page Hero Enhancement --- */
.page-hero-en {
  font-family: var(--font-display);
  font-size: 13px;
  letter-spacing: 4px;
  color: var(--color-text-light);
  text-transform: uppercase;
  margin-bottom: 16px;
}

/* --- Sections --- */
.sit-section {
  padding: 80px 0;
}

.sit-section--gray {
  background: var(--color-bg-gray);
}

.sit-container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.sit-section-label {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 3px;
  color: var(--color-primary);
  text-transform: uppercase;
  margin-bottom: 12px;
}

.sit-section-heading {
  font-family: var(--font-serif);
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 500;
  color: var(--color-navy);
  margin-bottom: 48px;
  letter-spacing: 1px;
  line-height: 1.5;
}

/* --- Intro --- */
.sit-intro {
  max-width: 720px;
  margin-bottom: 64px;
}

.sit-intro-text {
  font-size: 15px;
  line-height: 2;
  color: var(--color-text);
}

/* --- Stats --- */
.sit-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.sit-stat {
  text-align: center;
  padding: 32px 16px;
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  transition: all var(--transition);
}

.sit-stat:hover {
  border-color: var(--color-primary);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.06);
}

.sit-stat-number {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(28px, 3vw, 36px);
  font-weight: 600;
  color: var(--color-primary);
  letter-spacing: 1px;
  margin-bottom: 8px;
}

.sit-stat-label {
  font-size: 13px;
  color: var(--color-text-light);
  letter-spacing: 1px;
}

/* --- Service Cards --- */
.sit-services-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.sit-service-card {
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: 40px 32px;
  transition: all var(--transition);
}

.sit-service-card:hover {
  border-color: var(--color-primary);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
  transform: translateY(-4px);
}

.sit-service-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  margin-bottom: 20px;
  color: var(--color-primary);
}

.sit-service-icon svg {
  width: 48px;
  height: 48px;
}

.sit-service-card h3 {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 600;
  color: var(--color-navy);
  margin-bottom: 4px;
  letter-spacing: 0.5px;
}

.sit-service-en {
  font-family: var(--font-display);
  font-size: 11px;
  letter-spacing: 2px;
  color: var(--color-text-light);
  text-transform: uppercase;
  margin-bottom: 16px;
}

.sit-service-card > p:not(.sit-service-en) {
  font-size: 14px;
  line-height: 1.9;
  color: var(--color-text);
  margin-bottom: 20px;
}

.sit-service-features {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.sit-service-features li {
  font-size: 13px;
  color: var(--color-text);
  padding-left: 20px;
  position: relative;
  line-height: 1.6;
}

.sit-service-features li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 7px;
  width: 8px;
  height: 8px;
  border: 1.5px solid var(--color-primary);
  border-radius: 50%;
}

/* --- Process Flow --- */
.sit-process {
  display: flex;
  flex-direction: column;
  gap: 0;
  position: relative;
}

.sit-process::before {
  content: '';
  position: absolute;
  left: 24px;
  top: 48px;
  bottom: 48px;
  width: 2px;
  background: var(--color-border);
}

.sit-process-step {
  display: flex;
  align-items: flex-start;
  gap: 32px;
  padding: 24px 0;
  position: relative;
}

.sit-process-number {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 600;
  color: #ffffff;
  background: var(--color-primary);
  border-radius: 50%;
  z-index: 1;
}

.sit-process-step h3 {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 600;
  color: var(--color-navy);
  margin-bottom: 8px;
  letter-spacing: 0.5px;
}

.sit-process-step p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--color-text);
  max-width: 600px;
}

/* --- Technology Stack --- */
.sit-tech-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.sit-tech-group {
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: 28px 24px;
}

.sit-tech-group h3 {
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: 600;
  color: var(--color-navy);
  margin-bottom: 16px;
  letter-spacing: 0.5px;
}

.sit-tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.sit-tech-tags span {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.5px;
  color: var(--color-primary);
  background: rgba(45, 106, 79, 0.08);
  padding: 6px 14px;
  border-radius: 20px;
  transition: all 0.2s ease;
}

.sit-tech-tags span:hover {
  background: var(--color-primary);
  color: #ffffff;
}

/* --- Use Cases --- */
.sit-cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.sit-case-card {
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: 32px 28px;
  transition: all var(--transition);
}

.sit-case-card:hover {
  border-color: var(--color-primary);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
  transform: translateY(-4px);
}

.sit-case-tag {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 1px;
  color: var(--color-primary);
  background: rgba(45, 106, 79, 0.08);
  padding: 4px 12px;
  border-radius: 12px;
  margin-bottom: 16px;
}

.sit-case-card h3 {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 600;
  color: var(--color-navy);
  margin-bottom: 12px;
  line-height: 1.5;
  letter-spacing: 0.5px;
}

.sit-case-card p {
  font-size: 14px;
  line-height: 1.9;
  color: var(--color-text);
}

/* --- FAQ --- */
.sit-faq-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.sit-faq-item {
  border-bottom: 1px solid var(--color-border);
}

.sit-faq-item:first-child {
  border-top: 1px solid var(--color-border);
}

.sit-faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 24px 0;
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 500;
  color: var(--color-navy);
  line-height: 1.6;
  transition: color 0.2s ease;
  gap: 16px;
}

.sit-faq-question:hover {
  color: var(--color-primary);
}

.sit-faq-icon {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  position: relative;
  color: var(--color-primary);
}

.sit-faq-icon::before,
.sit-faq-icon::after {
  content: '';
  position: absolute;
  background: currentColor;
  transition: transform 0.3s ease;
}

.sit-faq-icon::before {
  top: 50%;
  left: 4px;
  width: 16px;
  height: 2px;
  transform: translateY(-50%);
}

.sit-faq-icon::after {
  top: 4px;
  left: 50%;
  width: 2px;
  height: 16px;
  transform: translateX(-50%);
}

.sit-faq-item.is-open .sit-faq-icon::after {
  transform: translateX(-50%) rotate(90deg);
}

.sit-faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}

.sit-faq-answer-inner {
  padding: 0 0 24px;
  font-size: 15px;
  line-height: 2;
  color: var(--color-text);
}

/* --- Service Card Link Style (for index.html) --- */
.service-card--link {
  text-decoration: none;
  color: inherit;
  display: block;
}

/* --- Responsive --- */
@media (max-width: 1024px) {
  .sit-stats {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .sit-cases-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .sit-section {
    padding: 48px 0;
  }

  .sit-section-heading {
    margin-bottom: 32px;
  }

  .sit-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  .sit-stat {
    padding: 24px 12px;
  }

  .sit-services-grid {
    grid-template-columns: 1fr;
  }

  .sit-service-card {
    padding: 28px 20px;
  }

  .sit-process::before {
    left: 20px;
  }

  .sit-process-number {
    width: 40px;
    height: 40px;
    font-size: 14px;
  }

  .sit-process-step {
    gap: 20px;
  }

  .sit-tech-grid {
    grid-template-columns: 1fr;
  }

  .sit-cases-grid {
    grid-template-columns: 1fr;
  }

  .sit-faq-question {
    font-size: 15px;
    padding: 20px 0;
  }
}