/* ============================================
   CSS Variables & Reset
   ============================================ */
:root {
  --color-primary: #1a2a4a;
  --color-accent: #e67e22;
  --color-accent-hover: #d35400;
  --color-text: #333333;
  --color-text-light: #666666;
  --color-bg: #ffffff;
  --color-bg-light: #f8f9fa;
  --color-bg-dark: #1a2a4a;
  --color-border: #e2e8f0;
  --color-white: #ffffff;
  --font-family: system-ui, -apple-system, "Segoe UI", "Hiragino Sans", "Noto Sans JP", sans-serif;
  --max-width: 1200px;
  --header-height: 72px;
  --radius: 8px;
  --shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.12);
  --transition: 0.3s ease;
}

*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-family);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

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

ul, ol {
  list-style: none;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
}

/* ============================================
   Utility
   ============================================ */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 80px 0;
}

.section-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-primary);
  text-align: center;
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 1rem;
  color: var(--color-text-light);
  text-align: center;
  margin-bottom: 48px;
}

.btn {
  display: inline-block;
  padding: 14px 36px;
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 600;
  transition: all var(--transition);
  text-align: center;
}

.btn-primary {
  background: var(--color-accent);
  color: var(--color-white);
}

.btn-primary:hover {
  background: var(--color-accent-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.btn-outline {
  border: 2px solid var(--color-accent);
  color: var(--color-accent);
}

.btn-outline:hover {
  background: var(--color-accent);
  color: var(--color-white);
  transform: translateY(-2px);
}

.btn-white {
  background: var(--color-white);
  color: var(--color-accent);
}

.btn-white:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

/* ============================================
   Fade-in Animation
   ============================================ */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================
   Header
   ============================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
  transition: box-shadow var(--transition);
}

.header.scrolled {
  box-shadow: var(--shadow);
}

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: -0.02em;
}

.logo span {
  color: var(--color-accent);
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-list a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text);
  transition: color var(--transition);
  position: relative;
}

.nav-list a::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: width var(--transition);
}

.nav-list a:hover,
.nav-list a.active {
  color: var(--color-accent);
}

.nav-list a:hover::after,
.nav-list a.active::after {
  width: 100%;
}

.nav-cta {
  padding: 10px 24px !important;
  background: var(--color-accent);
  color: var(--color-white) !important;
  border-radius: var(--radius);
  font-size: 0.9rem;
}

.nav-cta::after {
  display: none !important;
}

.nav-cta:hover {
  background: var(--color-accent-hover);
  color: var(--color-white) !important;
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 28px;
  padding: 4px 0;
  z-index: 1001;
}

.hamburger span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-primary);
  transition: all var(--transition);
  border-radius: 1px;
}

.hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
  padding-top: calc(var(--header-height) + 80px);
  padding-bottom: 80px;
  background: linear-gradient(135deg, var(--color-bg-dark) 0%, #2a3f6a 100%);
  color: var(--color-white);
  text-align: center;
  min-height: 600px;
  display: flex;
  align-items: center;
}

.hero-content {
  max-width: 720px;
  margin: 0 auto;
}

.hero h1 {
  font-size: 3rem;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}

.hero p {
  font-size: 1.2rem;
  opacity: 0.85;
  margin-bottom: 40px;
  line-height: 1.8;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ============================================
   Services Section (3 columns)
   ============================================ */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.service-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 40px 32px;
  text-align: center;
  transition: all var(--transition);
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-accent);
}

.service-icon {
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg, var(--color-accent), #f0a500);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
  font-size: 1.8rem;
}

.service-card h3 {
  font-size: 1.2rem;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.service-card p {
  font-size: 0.95rem;
  color: var(--color-text-light);
}

/* ============================================
   Strengths / Numbers
   ============================================ */
.strengths {
  background: var(--color-bg-light);
}

.numbers-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  text-align: center;
}

.number-item .number {
  font-size: 3rem;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1.2;
}

.number-item .label {
  font-size: 0.95rem;
  color: var(--color-text-light);
  margin-top: 8px;
}

/* ============================================
   News Section
   ============================================ */
.news-list {
  max-width: 800px;
  margin: 0 auto;
}

.news-item {
  display: flex;
  align-items: baseline;
  gap: 24px;
  padding: 20px 0;
  border-bottom: 1px solid var(--color-border);
  transition: background var(--transition);
}

.news-item:hover {
  background: var(--color-bg-light);
  padding-left: 12px;
}

.news-date {
  font-size: 0.85rem;
  color: var(--color-text-light);
  white-space: nowrap;
}

.news-tag {
  font-size: 0.75rem;
  padding: 2px 10px;
  border-radius: 100px;
  background: var(--color-accent);
  color: var(--color-white);
  white-space: nowrap;
}

.news-title {
  font-size: 0.95rem;
}

/* ============================================
   Page Header (Sub Pages)
   ============================================ */
.page-header {
  padding-top: calc(var(--header-height) + 60px);
  padding-bottom: 60px;
  background: var(--color-bg-dark);
  color: var(--color-white);
  text-align: center;
}

.page-header h1 {
  font-size: 2.4rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.page-header p {
  font-size: 1rem;
  opacity: 0.7;
}

/* ============================================
   About Page
   ============================================ */
.vision-section {
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.vision-section h2 {
  font-size: 1.8rem;
  color: var(--color-primary);
  margin-bottom: 24px;
}

.vision-section p {
  font-size: 1.05rem;
  color: var(--color-text-light);
  line-height: 2;
}

.company-table {
  max-width: 800px;
  margin: 0 auto;
  width: 100%;
  border-collapse: collapse;
}

.company-table th,
.company-table td {
  padding: 16px 20px;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.95rem;
}

.company-table th {
  width: 160px;
  color: var(--color-primary);
  font-weight: 600;
  background: var(--color-bg-light);
}

/* Timeline */
.timeline {
  max-width: 700px;
  margin: 0 auto;
  position: relative;
  padding-left: 40px;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--color-border);
}

.timeline-item {
  position: relative;
  margin-bottom: 32px;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -36px;
  top: 6px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-accent);
  border: 3px solid var(--color-white);
  box-shadow: 0 0 0 2px var(--color-accent);
}

.timeline-year {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: 4px;
}

.timeline-text {
  font-size: 0.95rem;
  color: var(--color-text);
}

/* ============================================
   Service Page
   ============================================ */
.service-detail-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 40px;
}

.service-detail-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 40px;
  transition: all var(--transition);
}

.service-detail-card:hover {
  box-shadow: var(--shadow-lg);
}

.service-detail-card h3 {
  font-size: 1.3rem;
  color: var(--color-primary);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.service-detail-card p {
  font-size: 0.95rem;
  color: var(--color-text-light);
  line-height: 1.8;
}

/* Flow */
.flow-steps {
  display: flex;
  justify-content: center;
  gap: 0;
  flex-wrap: wrap;
  max-width: 900px;
  margin: 0 auto;
}

.flow-step {
  text-align: center;
  flex: 1;
  min-width: 160px;
  position: relative;
  padding: 0 20px;
}

.flow-step:not(:last-child)::after {
  content: "";
  position: absolute;
  right: -8px;
  top: 28px;
  width: 16px;
  height: 16px;
  border-top: 2px solid var(--color-accent);
  border-right: 2px solid var(--color-accent);
  transform: rotate(45deg);
}

.flow-number {
  width: 56px;
  height: 56px;
  background: var(--color-accent);
  color: var(--color-white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  font-weight: 700;
  margin: 0 auto 16px;
}

.flow-step h4 {
  font-size: 1rem;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.flow-step p {
  font-size: 0.85rem;
  color: var(--color-text-light);
}

/* ============================================
   Contact Page
   ============================================ */
.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  max-width: 1000px;
  margin: 0 auto;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-primary);
}

.form-group label .required {
  color: #e53e3e;
  font-size: 0.8rem;
  margin-left: 4px;
}

.form-group input,
.form-group textarea,
.form-group select {
  padding: 12px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 1rem;
  font-family: inherit;
  transition: border-color var(--transition);
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(230, 126, 34, 0.15);
}

.form-group textarea {
  min-height: 160px;
  resize: vertical;
}

.form-group .error-message {
  font-size: 0.8rem;
  color: #e53e3e;
  display: none;
}

.form-group.has-error input,
.form-group.has-error textarea {
  border-color: #e53e3e;
}

.form-group.has-error .error-message {
  display: block;
}

.contact-info h3 {
  font-size: 1.3rem;
  color: var(--color-primary);
  margin-bottom: 24px;
}

.contact-info-item {
  display: flex;
  gap: 16px;
  margin-bottom: 24px;
  align-items: flex-start;
}

.contact-info-item .icon {
  width: 40px;
  height: 40px;
  background: var(--color-bg-light);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 1.1rem;
}

.contact-info-item h4 {
  font-size: 0.9rem;
  color: var(--color-primary);
  margin-bottom: 2px;
}

.contact-info-item p {
  font-size: 0.9rem;
  color: var(--color-text-light);
}

.map-placeholder {
  width: 100%;
  height: 240px;
  background: var(--color-bg-light);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-light);
  font-size: 0.9rem;
  margin-top: 32px;
  border: 1px solid var(--color-border);
}

/* ============================================
   Footer
   ============================================ */
.footer {
  background: var(--color-bg-dark);
  color: var(--color-white);
  padding: 60px 0 30px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-about .logo {
  color: var(--color-white);
  margin-bottom: 16px;
  display: inline-block;
}

.footer-about p {
  font-size: 0.85rem;
  opacity: 0.7;
  line-height: 1.8;
}

.footer h4 {
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 16px;
  opacity: 0.9;
}

.footer-links a {
  display: block;
  font-size: 0.85rem;
  opacity: 0.6;
  margin-bottom: 10px;
  transition: opacity var(--transition);
}

.footer-links a:hover {
  opacity: 1;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 24px;
  text-align: center;
  font-size: 0.8rem;
  opacity: 0.5;
}

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

  .numbers-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }

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

@media (max-width: 768px) {
  .section {
    padding: 40px 0;
  }

  .section-title {
    font-size: 1.4rem;
    margin-bottom: 10px;
  }

  .section-subtitle {
    font-size: 0.9rem;
    margin-bottom: 28px;
  }

  /* Header Mobile */
  .hamburger {
    display: flex;
  }

  .nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: var(--color-white);
    padding: 100px 32px 32px;
    transition: right var(--transition);
    box-shadow: var(--shadow-lg);
  }

  .nav.open {
    right: 0;
  }

  .nav-list {
    flex-direction: column;
    align-items: flex-start;
    gap: 24px;
  }

  .nav-cta {
    width: 100%;
    text-align: center;
  }

  /* Hero */
  .hero {
    min-height: auto;
    padding-top: calc(var(--header-height) + 40px);
    padding-bottom: 40px;
  }

  .hero h1 {
    font-size: 1.7rem;
    margin-bottom: 16px;
  }

  .hero p {
    font-size: 0.95rem;
    margin-bottom: 28px;
  }

  /* Services */
  .services-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .service-card {
    padding: 28px 24px;
  }

  .service-detail-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .service-detail-card {
    padding: 28px 24px;
  }

  /* Flow */
  .flow-steps {
    flex-direction: column;
    align-items: center;
    gap: 16px;
  }

  .flow-step:not(:last-child)::after {
    display: none;
  }

  .flow-number {
    width: 44px;
    height: 44px;
    font-size: 1rem;
    margin-bottom: 10px;
  }

  /* Contact */
  .contact-wrapper {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  /* News */
  .news-item {
    flex-wrap: wrap;
    gap: 8px;
    padding: 14px 0;
  }

  /* Footer */
  .footer {
    padding: 40px 0 20px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
    margin-bottom: 24px;
  }

  /* Numbers */
  .numbers-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .number-item .number {
    font-size: 2rem;
  }

  /* Page Header */
  .page-header {
    padding-top: calc(var(--header-height) + 36px);
    padding-bottom: 36px;
  }

  .page-header h1 {
    font-size: 1.6rem;
    margin-bottom: 8px;
  }

  /* Vision */
  .vision-section h2 {
    font-size: 1.4rem;
    margin-bottom: 16px;
  }

  .vision-section p {
    font-size: 0.95rem;
  }

  /* Company Table */
  .company-table th,
  .company-table td {
    padding: 12px 14px;
    font-size: 0.88rem;
  }

  .company-table th {
    width: 110px;
  }
}

@media (max-width: 480px) {
  .section {
    padding: 32px 0;
  }

  .section-title {
    font-size: 1.25rem;
  }

  .section-subtitle {
    margin-bottom: 24px;
  }

  .hero h1 {
    font-size: 1.5rem;
  }

  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }

  .btn {
    width: 100%;
    max-width: 280px;
    padding: 12px 24px;
    font-size: 0.9rem;
  }

  .number-item .number {
    font-size: 1.7rem;
  }

  .page-header {
    padding-top: calc(var(--header-height) + 28px);
    padding-bottom: 28px;
  }

  .page-header h1 {
    font-size: 1.4rem;
  }
}

/* ============================================
   Floating CTA (Mobile)
   ============================================ */
.floating-cta {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  z-index: 999;
  background: var(--color-white);
  border-top: 1px solid var(--color-border);
  box-shadow: 0 -4px 12px rgba(0, 0, 0, 0.1);
  padding: 10px 16px;
}

.floating-cta-inner {
  display: flex;
  gap: 10px;
  max-width: var(--max-width);
  margin: 0 auto;
}

.floating-cta a {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 12px 8px;
  border-radius: var(--radius);
  font-size: 0.85rem;
  font-weight: 700;
  text-align: center;
  transition: all var(--transition);
}

.floating-cta .cta-phone {
  background: var(--color-accent);
  color: var(--color-white);
}

.floating-cta .cta-contact {
  background: var(--color-primary);
  color: var(--color-white);
}

@media (max-width: 768px) {
  .floating-cta {
    display: block;
  }

  .footer {
    padding-bottom: 80px;
  }

  .lp-footer {
    padding-bottom: 80px;
  }
}

/* ============================================
   Accessibility Improvements
   ============================================ */
.form-group input:focus-visible,
.form-group textarea:focus-visible,
.form-group select:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--color-primary);
  color: var(--color-white);
  padding: 8px 16px;
  z-index: 10000;
  transition: top 0.3s;
  font-size: 0.85rem;
}

.skip-link:focus {
  top: 0;
}

/* Breadcrumb */
.breadcrumb {
  display: flex;
  justify-content: center;
  gap: 8px;
  font-size: 0.85rem;
  margin-top: 12px;
  opacity: 0.7;
}