/* ===================================
   CSS Variables
   =================================== */
:root {
  /* Primary Colors (Blue - Trust & Reliability) */
  --color-primary: #1a5fb4;
  --color-primary-dark: #0d4a8c;
  --color-primary-light: #4a90d9;

  /* Secondary Colors (Orange - CTA) */
  --color-secondary: #e85c0d;
  --color-secondary-dark: #c44a00;

  /* Neutral Colors */
  --color-text: #333333;
  --color-text-light: #666666;
  --color-text-muted: #999999;
  --color-heading: #1a1a1a;

  /* Background Colors */
  --color-bg: #ffffff;
  --color-bg-light: #f5f8fc;
  --color-bg-accent: #e8f0fa;

  /* Border & Shadow */
  --color-border: #d1dce8;
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);

  /* Typography */
  --font-base: 'Noto Sans JP', 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', 'Yu Gothic', 'Meiryo', sans-serif;

  /* Font Sizes */
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 2rem;
  --font-size-4xl: 2.5rem;
  --font-size-5xl: 3rem;

  /* Line Heights */
  --line-height-tight: 1.3;
  --line-height-base: 1.7;
  --line-height-loose: 2.0;

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 12px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-base: 0.2s ease;
  --transition-slow: 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-base);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-base);
}

a:hover {
  color: var(--color-primary-dark);
}

ul {
  list-style: none;
}

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

/* ===================================
   Layout
   =================================== */
.container {
  width: 100%;
  max-width: 1140px;
  padding: 0 var(--spacing-md);
  margin: 0 auto;
}

@media (min-width: 768px) {
  .container {
    padding: 0 var(--spacing-lg);
  }
}

/* ===================================
   Buttons
   =================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  font-size: var(--font-size-base);
  font-weight: 600;
  font-family: var(--font-base);
  text-decoration: none;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
}

.btn-primary {
  background-color: var(--color-secondary);
  color: #fff;
}

.btn-primary:hover {
  background-color: var(--color-secondary-dark);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-header {
  background-color: var(--color-primary);
  color: #fff;
  padding: 10px 20px;
  font-size: var(--font-size-sm);
}

.btn-header:hover {
  background-color: var(--color-primary-dark);
  color: #fff;
}

.btn-large {
  padding: 16px 40px;
  font-size: var(--font-size-lg);
}

/* ===================================
   Header
   =================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  transition: box-shadow var(--transition-base);
}

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

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.logo {
  display: flex;
  align-items: center;
}

.logo img {
  height: 36px;
  width: auto;
}

.logo:hover {
  opacity: 0.8;
}

.nav {
  display: none;
  align-items: center;
  gap: var(--spacing-xl);
}

.nav-link {
  font-weight: 500;
  color: var(--color-text);
}

.nav-link:hover {
  color: var(--color-primary);
}

.nav-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 30px;
  height: 30px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}

.nav-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-text);
  transition: all var(--transition-base);
}

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

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

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

@media (min-width: 768px) {
  .nav {
    display: flex;
  }

  .nav-toggle {
    display: none;
  }
}

/* Mobile Navigation */
@media (max-width: 767px) {
  .nav {
    position: absolute;
    top: 70px;
    left: 0;
    right: 0;
    flex-direction: column;
    background-color: #fff;
    padding: var(--spacing-lg);
    gap: var(--spacing-md);
    box-shadow: var(--shadow-md);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-slow);
  }

  .nav.active {
    display: flex;
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

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

/* ===================================
   Hero Section
   =================================== */
.hero {
  position: relative;
  padding-top: 120px;
  padding-bottom: 80px;
  min-height: 80vh;
  display: flex;
  align-items: center;
  background-image: url('../images/hero2.png');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.92) 0%, rgba(255, 255, 255, 0.72) 50%, rgba(255, 255, 255, 0.55) 100%);
  z-index: 1;
}

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

.hero-content {
  max-width: 650px;
}

.hero-tagline {
  font-size: var(--font-size-lg);
  color: var(--color-primary);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.hero-title {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  color: var(--color-heading);
  line-height: var(--line-height-tight);
  margin-bottom: var(--spacing-lg);
}

.hero-title .highlight {
  color: var(--color-primary);
}

.hero-description {
  font-size: var(--font-size-lg);
  color: var(--color-text);
  margin-bottom: var(--spacing-xl);
  line-height: var(--line-height-loose);
}

.hero-cta {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--spacing-md);
}

.hero-note {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
}

@media (min-width: 768px) {
  .hero {
    padding-top: 150px;
    padding-bottom: 100px;
  }

  .hero-title {
    font-size: var(--font-size-4xl);
  }
}

@media (min-width: 1024px) {
  .hero-title {
    font-size: var(--font-size-5xl);
  }
}

/* ===================================
   Section Common
   =================================== */
section {
  padding: 60px 0;
}

@media (min-width: 768px) {
  section {
    padding: 80px 0;
  }
}

@media (min-width: 1024px) {
  section {
    padding: 100px 0;
  }
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-3xl);
}

.section-title {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-heading);
  margin-bottom: var(--spacing-md);
}

.section-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-light);
}

@media (min-width: 768px) {
  .section-title {
    font-size: var(--font-size-3xl);
  }
}

/* ===================================
   Before/After Section
   =================================== */
.before-after {
  background: linear-gradient(180deg, var(--color-bg-light) 0%, #e0ecf8 100%);
  position: relative;
  overflow: hidden;
}

.before-after::before {
  content: '';
  position: absolute;
  top: -60%;
  right: -20%;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(26, 95, 180, 0.06) 0%, transparent 70%);
  pointer-events: none;
}

.before-after .section-title {
  position: relative;
}

.before-after .section-title::after {
  content: '';
  display: block;
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light));
  border-radius: 2px;
  margin: var(--spacing-md) auto 0;
}

.comparison {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
  align-items: center;
}

@media (min-width: 1024px) {
  .comparison {
    flex-direction: row;
    align-items: stretch;
    gap: var(--spacing-xl);
  }
}

.comparison-column {
  flex: 1;
  border-radius: var(--radius-lg);
  padding: var(--spacing-2xl) var(--spacing-xl);
  width: 100%;
  max-width: 480px;
  position: relative;
  transition: transform var(--transition-slow), box-shadow var(--transition-slow);
}

.comparison-column:hover {
  transform: translateY(-4px);
}

.comparison-column.before {
  background-color: #fff;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.comparison-column.before:hover {
  box-shadow: var(--shadow-md);
}

.comparison-column.after {
  background: linear-gradient(135deg, #ffffff 0%, #f0f6ff 100%);
  border: 2px solid var(--color-primary-light);
  box-shadow: 0 8px 30px rgba(26, 95, 180, 0.15);
}

.comparison-column.after:hover {
  box-shadow: 0 12px 40px rgba(26, 95, 180, 0.2);
}

.comparison-column.after::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light));
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.comparison-header {
  text-align: center;
  margin-bottom: var(--spacing-xl);
  padding-bottom: var(--spacing-lg);
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
}

.comparison-label {
  display: inline-block;
  font-size: var(--font-size-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  padding: 5px 16px;
  border-radius: var(--radius-full);
  margin-bottom: var(--spacing-sm);
}

.before .comparison-label {
  background-color: #f1f5f9;
  color: #64748b;
}

.after .comparison-label {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  color: #fff;
}

.comparison-title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-heading);
}

.comparison-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.comparison-list li {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
}

.before .comparison-list li {
  color: var(--color-text-light);
}

.after .comparison-list li {
  color: var(--color-text);
}

.comparison-icon-wrap {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
}

.before .comparison-icon-wrap {
  background-color: #f8fafc;
  border: 1px solid #e2e8f0;
}

.after .comparison-icon-wrap {
  background: linear-gradient(135deg, var(--color-bg-accent), #dbeafe);
  border: 1px solid rgba(26, 95, 180, 0.15);
}

.comparison-icon {
  font-size: var(--font-size-lg);
  line-height: 1;
}

.comparison-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding-top: 2px;
}

.comparison-text-main {
  font-weight: 500;
  font-size: var(--font-size-base);
}

.comparison-text-sub {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  line-height: var(--line-height-base);
}

.after .comparison-text-main {
  color: var(--color-heading);
}

.comparison-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-sm) 0;
}

.comparison-arrow-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--color-primary);
}

.comparison-arrow-label {
  font-size: var(--font-size-xs);
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  padding: 4px 14px;
  border-radius: var(--radius-full);
  white-space: nowrap;
}

.comparison-arrow-inner svg {
  transform: rotate(90deg);
}

@media (min-width: 1024px) {
  .comparison-arrow-inner {
    flex-direction: column;
  }

  .comparison-arrow-inner svg {
    transform: rotate(0deg);
  }
}

/* ===================================
   Services Section
   =================================== */
.services {
  background-color: var(--color-bg-light);
}

.service-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-xl);
}

@media (min-width: 768px) {
  .service-cards {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
  }
}

@media (min-width: 1024px) {
  .service-cards {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
  }
}

.service-card {
  background-color: #fff;
  padding: var(--spacing-xl);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
}

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

.service-icon {
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-bg-accent);
  border-radius: var(--radius-lg);
  color: var(--color-primary);
  margin-bottom: var(--spacing-lg);
}

.service-step {
  display: inline-block;
  font-size: var(--font-size-xs);
  font-weight: 700;
  color: var(--color-primary);
  background-color: var(--color-bg-accent);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  margin-bottom: var(--spacing-md);
}

.service-title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-heading);
  margin-bottom: var(--spacing-md);
}

.service-description {
  font-size: var(--font-size-base);
  color: var(--color-text-light);
  margin-bottom: var(--spacing-lg);
  line-height: var(--line-height-base);
}

.service-features {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.service-features li {
  font-size: var(--font-size-sm);
  color: var(--color-text);
  padding-left: var(--spacing-lg);
  position: relative;
}

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

/* ===================================
   Case Studies Section
   =================================== */
.case-studies {
  background-color: var(--color-bg-light);
}

.case-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-xl);
}

@media (min-width: 768px) {
  .case-cards {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .case-cards {
    grid-template-columns: repeat(3, 1fr);
  }
}

.case-card {
  background-color: #fff;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: all var(--transition-base);
}

.case-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.case-header {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  padding: var(--spacing-lg);
  color: #fff;
}

.case-industry {
  display: inline-block;
  font-size: var(--font-size-xs);
  font-weight: 600;
  background-color: rgba(255, 255, 255, 0.2);
  padding: 4px 10px;
  border-radius: var(--radius-full);
  margin-bottom: var(--spacing-sm);
}

.case-company {
  font-size: var(--font-size-lg);
  font-weight: 700;
}

.case-body {
  padding: var(--spacing-lg);
}

.case-challenge,
.case-solution,
.case-result {
  margin-bottom: var(--spacing-md);
}

.case-result {
  margin-bottom: 0;
}

.case-label {
  font-size: var(--font-size-xs);
  font-weight: 700;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--spacing-xs);
}

.case-challenge p,
.case-solution p {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  line-height: var(--line-height-base);
}

.case-metrics {
  display: flex;
  gap: var(--spacing-lg);
}

.case-metrics li {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.metric-value {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-secondary);
  line-height: 1.2;
}

.metric-label {
  font-size: var(--font-size-xs);
  color: var(--color-text-light);
  margin-top: 4px;
}

/* ===================================
   Contact Section
   =================================== */
.contact {
  background-color: var(--color-bg);
}

.contact-wrapper {
  max-width: 700px;
  margin: 0 auto;
}

.google-form-container {
  background-color: #fff;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
}

.google-form-container iframe {
  display: block;
  width: 100%;
  min-height: 1250px;
  border: none;
}

@media (min-width: 768px) {
  .google-form-container iframe {
    min-height: 1200px;
  }
}

/* ===================================
   Footer
   =================================== */
.footer {
  background-color: var(--color-heading);
  color: #fff;
  padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

.footer-content {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

@media (min-width: 768px) {
  .footer-content {
    flex-direction: row;
    justify-content: space-between;
    align-items: flex-start;
  }
}

.footer-company {
  font-size: var(--font-size-lg);
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
}

.footer-address,
.footer-contact {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.7);
  line-height: var(--line-height-loose);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

@media (min-width: 768px) {
  .footer-links {
    flex-direction: row;
    gap: var(--spacing-xl);
  }
}

.footer-links a {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.7);
  transition: color var(--transition-base);
}

.footer-links a:hover {
  color: #fff;
}

.footer-copyright {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.5);
  text-align: center;
  padding-top: var(--spacing-xl);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* ===================================
   Policy Page
   =================================== */
.policy-page {
  padding-top: 120px;
  padding-bottom: 80px;
}

.policy-title {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  color: var(--color-heading);
  text-align: center;
  margin-bottom: var(--spacing-3xl);
}

.policy-content {
  max-width: 800px;
  margin: 0 auto;
}

.policy-content > p {
  font-size: var(--font-size-base);
  color: var(--color-text);
  line-height: var(--line-height-loose);
  margin-bottom: var(--spacing-xl);
}

.policy-content h2 {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-heading);
  margin-top: var(--spacing-2xl);
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-sm);
  border-bottom: 2px solid var(--color-bg-accent);
}

.policy-content ul {
  margin-bottom: var(--spacing-xl);
  padding-left: var(--spacing-lg);
}

.policy-content ul li {
  font-size: var(--font-size-base);
  color: var(--color-text);
  line-height: var(--line-height-loose);
  padding-left: var(--spacing-md);
  position: relative;
}

.policy-content ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 6px;
  height: 6px;
  background-color: var(--color-primary);
  border-radius: 50%;
}

.policy-contact {
  background-color: var(--color-bg-light);
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-xl);
}

.policy-contact p {
  font-size: var(--font-size-base);
  color: var(--color-text);
  line-height: var(--line-height-loose);
  margin-bottom: 0;
}

.policy-date {
  margin-top: var(--spacing-3xl);
  text-align: right;
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
}