/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary-color: #ff9900;
  --primary-dark: #e88b00;
  --secondary-color: #232f3e;
  --accent-color: #0066c0;
  --text-color: #333;
  --text-light: #666;
  --background: #ffffff;
  --background-light: #f5f5f5;
  --border-color: #e0e0e0;
  --success-color: #28a745;
  --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.15);
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-color);
  background-color: var(--background);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
.header {
  background: var(--secondary-color);
  color: white;
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow);
}

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

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: white;
}

.header-cta-btn {
  background: var(--primary-color);
  color: white;
  padding: 0.75rem 2rem;
  text-decoration: none;
  border-radius: 5px;
  font-weight: 600;
  transition: background 0.3s;
}

.header-cta-btn:hover {
  background: var(--primary-dark);
}

/* Hero Section */
.hero {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  padding: 5rem 0;
}

.hero-content {
  text-align: center;
  margin-bottom: 3rem;
}

.hero-badge {
  display: inline-block;
  background: rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(10px);
  padding: 0.5rem 1.5rem;
  border-radius: 50px;
  font-weight: 600;
  margin-bottom: 1.5rem;
  font-size: 0.9rem;
}

.hero-title {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 1.5rem;
  line-height: 1.2;
}

.hero-description {
  font-size: 1.2rem;
  margin-bottom: 2rem;
  opacity: 0.95;
  line-height: 1.8;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.cta-button {
  padding: 1rem 2.5rem;
  border-radius: 5px;
  text-decoration: none;
  font-weight: 600;
  font-size: 1.1rem;
  transition: all 0.3s;
  display: inline-block;
}

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

.cta-button-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(255, 153, 0, 0.3);
}

.cta-button-secondary {
  background: white;
  color: var(--secondary-color);
}

.cta-button-secondary:hover {
  background: var(--background-light);
  transform: translateY(-2px);
}

.hero-image {
  max-width: 900px;
  margin: 0 auto;
}

.screenshot-placeholder {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0.05) 100%);
  border: 2px dashed rgba(255, 255, 255, 0.3);
  border-radius: 10px;
  padding: 4rem 2rem;
  text-align: center;
  backdrop-filter: blur(10px);
}

.screenshot-text {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.screenshot-description {
  font-size: 1.1rem;
  opacity: 0.9;
  line-height: 1.6;
}

/* Section Styles */
section {
  padding: 5rem 0;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 800;
  text-align: center;
  margin-bottom: 3rem;
  color: var(--secondary-color);
}

/* Account Suspension Alert Section */
.account-suspension-alert {
  background: linear-gradient(135deg, #ff6b6b 0%, #ee5a6f 100%);
  color: white;
  padding: 4rem 0;
}

.alert-box {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  border: 2px solid rgba(255, 255, 255, 0.2);
  border-radius: 15px;
  padding: 3rem;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
}

.alert-icon {
  font-size: 4rem;
  text-align: center;
  margin-bottom: 1.5rem;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.1); }
}

.alert-content {
  text-align: center;
}

.alert-title {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 1.5rem;
  color: white;
}

.alert-description {
  font-size: 1.2rem;
  line-height: 1.8;
  margin-bottom: 2.5rem;
  opacity: 0.95;
}

.alert-stats {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 2rem;
  flex-wrap: wrap;
  background: rgba(255, 255, 255, 0.15);
  padding: 2rem;
  border-radius: 10px;
}

.alert-stat-item {
  text-align: center;
}

.stat-number {
  font-size: 2.5rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 0.5rem;
}

.stat-label {
  font-size: 1rem;
  opacity: 0.9;
}

.alert-stat-arrow {
  font-size: 2rem;
  opacity: 0.7;
}

@media (max-width: 768px) {
  .alert-stats {
    flex-direction: column;
  }

  .alert-stat-arrow {
    transform: rotate(90deg);
  }
}

/* Problem Section */
.problem {
  background: var(--background-light);
}

.problem-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.problem-item {
  background: white;
  padding: 2rem;
  border-radius: 10px;
  box-shadow: var(--shadow);
  text-align: center;
  transition: transform 0.3s;
}

.problem-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.problem-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.problem-item h3 {
  font-size: 1.3rem;
  margin-bottom: 1rem;
  color: var(--secondary-color);
}

.problem-item p {
  color: var(--text-light);
  line-height: 1.6;
}

/* Solution Section */
.solution {
  background: white;
}

.solution-content {
  max-width: 900px;
  margin: 0 auto;
}

.solution-subtitle {
  font-size: 2rem;
  color: var(--accent-color);
  margin-bottom: 1.5rem;
}

.solution-description {
  font-size: 1.2rem;
  color: var(--text-light);
  margin-bottom: 2rem;
  line-height: 1.8;
}

.solution-highlight {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  padding: 2rem;
  border-radius: 10px;
  display: flex;
  align-items: center;
  gap: 1.5rem;
  margin-bottom: 2rem;
  box-shadow: 0 5px 20px rgba(102, 126, 234, 0.3);
}

.highlight-icon {
  font-size: 3rem;
  flex-shrink: 0;
}

.highlight-text strong {
  font-size: 1.3rem;
  display: block;
  margin-bottom: 0.5rem;
}

.highlight-text span {
  opacity: 0.95;
  font-size: 1rem;
}

.solution-benefits {
  list-style: none;
  padding: 0;
}

.solution-benefits li {
  padding: 1rem 0;
  padding-left: 2rem;
  position: relative;
  font-size: 1.1rem;
  border-bottom: 1px solid var(--border-color);
}

.solution-benefits li:last-child {
  border-bottom: none;
}

.solution-benefits li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--success-color);
  font-weight: bold;
  font-size: 1.3rem;
}

/* Features Section */
.features {
  background: var(--background-light);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.feature-card {
  background: white;
  padding: 2rem;
  border-radius: 10px;
  box-shadow: var(--shadow);
  transition: all 0.3s;
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.feature-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.feature-card h3 {
  font-size: 1.3rem;
  margin-bottom: 1rem;
  color: var(--secondary-color);
}

.feature-card p {
  color: var(--text-light);
  line-height: 1.6;
}

/* Use Cases Section */
.use-cases {
  background: white;
}

.use-cases-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.use-case-item {
  background: var(--background-light);
  padding: 2rem;
  border-radius: 10px;
  border-left: 4px solid var(--primary-color);
  transition: all 0.3s;
}

.use-case-item:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow);
}

.use-case-item h3 {
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
  color: var(--secondary-color);
}

.use-case-item p {
  color: var(--text-light);
  line-height: 1.6;
}

.use-case-primary {
  background: linear-gradient(135deg, rgba(255, 107, 107, 0.1) 0%, rgba(238, 90, 111, 0.1) 100%);
  border-left: 4px solid #ff6b6b;
  position: relative;
  grid-column: span 2;
}

.use-case-primary::before {
  content: "👑 最重要ユースケース";
  position: absolute;
  top: -12px;
  left: 20px;
  background: #ff6b6b;
  color: white;
  padding: 0.3rem 1rem;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
}

.use-case-primary h3 {
  margin-top: 1rem;
}

@media (max-width: 768px) {
  .use-case-primary {
    grid-column: span 1;
  }
}

/* Contact Section */
.contact {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
}

.contact .section-title {
  color: white;
}

.contact-content {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.contact-text h3 {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.contact-text > p {
  font-size: 1.2rem;
  margin-bottom: 3rem;
  opacity: 0.95;
}

.contact-methods {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-bottom: 3rem;
}

.contact-method {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  padding: 2rem;
  border-radius: 10px;
  display: flex;
  align-items: center;
  gap: 1.5rem;
  text-align: left;
}

.contact-method-icon {
  font-size: 3rem;
}

.contact-method-label {
  font-size: 0.9rem;
  opacity: 0.9;
  margin-bottom: 0.5rem;
}

.contact-method-value {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.contact-method-note {
  font-size: 0.85rem;
  opacity: 0.8;
}

.contact-cta {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

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

.services-intro {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 3rem;
  font-size: 1.1rem;
  color: var(--text-light);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
  margin-bottom: 3rem;
}

.service-card {
  background: white;
  padding: 2.5rem;
  border-radius: 10px;
  box-shadow: var(--shadow);
  transition: all 0.3s;
}

.service-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.service-icon {
  font-size: 3.5rem;
  margin-bottom: 1.5rem;
}

.service-card h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: var(--secondary-color);
}

.service-card > p {
  color: var(--text-light);
  margin-bottom: 1.5rem;
  line-height: 1.8;
}

.service-features {
  list-style: none;
  padding: 0;
}

.service-features li {
  padding: 0.5rem 0;
  padding-left: 1.5rem;
  position: relative;
  color: var(--text-color);
}

.service-features li::before {
  content: "•";
  position: absolute;
  left: 0;
  color: var(--primary-color);
  font-weight: bold;
  font-size: 1.5rem;
}

.services-cta {
  text-align: center;
  background: white;
  padding: 3rem;
  border-radius: 10px;
  box-shadow: var(--shadow);
}

.services-cta-text {
  font-size: 1.3rem;
  margin-bottom: 1.5rem;
  color: var(--secondary-color);
  font-weight: 600;
}

/* Footer */
.footer {
  background: var(--secondary-color);
  color: white;
  padding: 3rem 0 1rem;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: start;
  margin-bottom: 2rem;
  flex-wrap: wrap;
  gap: 2rem;
}

.footer-info h3 {
  font-size: 1.3rem;
  margin-bottom: 0.5rem;
}

.footer-info p {
  opacity: 0.8;
}

.footer-contact p {
  margin-bottom: 0.5rem;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 1rem;
  text-align: center;
  opacity: 0.7;
  font-size: 0.9rem;
}

/* Responsive Design */
@media (max-width: 768px) {
  .hero-title {
    font-size: 2rem;
  }

  .hero-description {
    font-size: 1rem;
  }

  .section-title {
    font-size: 2rem;
  }

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

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

  .contact-cta {
    flex-direction: column;
  }

  .contact-methods {
    grid-template-columns: 1fr;
  }

  .footer-content {
    flex-direction: column;
    text-align: center;
  }

  .contact-method {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .hero {
    padding: 3rem 0;
  }

  section {
    padding: 3rem 0;
  }

  .hero-title {
    font-size: 1.75rem;
  }

  .problem-grid,
  .features-grid,
  .services-grid {
    grid-template-columns: 1fr;
  }
}