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

:root {
  --color-primary: #2c5f4e;
  --color-secondary: #4a7c63;
  --color-accent: #8fbc8f;
  --color-dark: #1a1a1a;
  --color-light: #f8f9fa;
  --color-white: #ffffff;
  --color-gray: #6c757d;
  --color-gray-light: #e9ecef;
  --color-text: #2d3436;
  --font-main: "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Yu Gothic", "Meiryo", sans-serif;
  --transition: all 0.3s ease;
}

body {
  font-family: var(--font-main);
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-white);
  overflow-x: hidden;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background-color: rgba(255, 255, 255, 0.98);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
  z-index: 1000;
  transition: var(--transition);
}

.nav-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 32px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 80px;
}

.logo {
  font-size: 28px;
  font-weight: bold;
  color: var(--color-primary);
  text-decoration: none;
  letter-spacing: 0.05em;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 40px;
}

.nav-menu a {
  text-decoration: none;
  color: var(--color-text);
  font-size: 16px;
  font-weight: 500;
  transition: var(--transition);
}

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

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.mobile-menu-btn span {
  width: 25px;
  height: 3px;
  background-color: var(--color-primary);
  transition: var(--transition);
}

/* Hero Section */
.hero {
  position: relative;
  height: 100vh;
  min-height: 700px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero-image {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: -2;
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(44, 95, 78, 0.85) 0%, rgba(74, 124, 99, 0.75) 100%);
  z-index: -1;
}

.hero-content {
  text-align: center;
  color: var(--color-white);
  max-width: 900px;
  padding: 0 24px;
  animation: fadeInUp 1s ease-out;
}

.hero-title {
  font-size: 64px;
  font-weight: bold;
  margin-bottom: 24px;
  line-height: 1.2;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.hero-subtitle {
  font-size: 24px;
  margin-bottom: 40px;
  opacity: 0.95;
  font-weight: 300;
}

.hero-btn {
  display: inline-block;
  padding: 18px 48px;
  background-color: var(--color-white);
  color: var(--color-primary);
  text-decoration: none;
  border-radius: 50px;
  font-size: 18px;
  font-weight: 600;
  transition: var(--transition);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.hero-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

/* Section Styles */
.section {
  padding: 100px 0;
}

.section-title {
  font-size: 48px;
  font-weight: bold;
  text-align: center;
  margin-bottom: 64px;
  color: var(--color-dark);
  position: relative;
}

.section-title::after {
  content: "";
  position: absolute;
  bottom: -16px;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 4px;
  background-color: var(--color-primary);
}

/* About Section */
.about {
  background-color: var(--color-light);
}

.about-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 48px;
}

.about-item {
  text-align: center;
  padding: 32px;
}

.about-number {
  font-size: 56px;
  font-weight: bold;
  color: var(--color-primary);
  opacity: 0.2;
  margin-bottom: 16px;
}

.about-item h3 {
  font-size: 28px;
  margin-bottom: 16px;
  color: var(--color-dark);
}

.about-item p {
  font-size: 17px;
  color: var(--color-gray);
  line-height: 1.8;
}

/* Methods Section */
.methods-grid {
  display: grid;
  gap: 64px;
}

.method-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.method-card:nth-child(even) {
  direction: rtl;
}

.method-card:nth-child(even) .method-content {
  direction: ltr;
}

.method-image {
  width: 100%;
  height: 400px;
  object-fit: cover;
  border-radius: 12px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.method-content h3 {
  font-size: 32px;
  margin-bottom: 20px;
  color: var(--color-primary);
}

.method-content p {
  font-size: 18px;
  color: var(--color-gray);
  margin-bottom: 24px;
  line-height: 1.8;
}

.method-steps {
  list-style: none;
}

.method-steps li {
  padding: 12px 0 12px 32px;
  position: relative;
  font-size: 17px;
  color: var(--color-text);
}

.method-steps li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-weight: bold;
  font-size: 20px;
}

/* Benefits Section */
.benefits {
  background-color: var(--color-light);
}

.benefits-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 32px;
}

.benefit-card {
  background-color: var(--color-white);
  padding: 40px;
  border-radius: 12px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
  transition: var(--transition);
}

.benefit-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.benefit-icon {
  width: 64px;
  height: 64px;
  background-color: var(--color-accent);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
}

.benefit-icon svg {
  width: 32px;
  height: 32px;
  color: var(--color-white);
}

.benefit-card h3 {
  font-size: 24px;
  margin-bottom: 16px;
  color: var(--color-dark);
}

.benefit-card p {
  font-size: 16px;
  color: var(--color-gray);
  line-height: 1.8;
}

/* Tips Section */
.tips-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.tips-image-wrapper {
  position: relative;
}

.tips-image {
  width: 100%;
  height: 600px;
  object-fit: cover;
  border-radius: 12px;
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.tips-list {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.tip-item {
  display: flex;
  gap: 24px;
}

.tip-number {
  width: 48px;
  height: 48px;
  background-color: var(--color-primary);
  color: var(--color-white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: bold;
  flex-shrink: 0;
}

.tip-item h4 {
  font-size: 22px;
  margin-bottom: 8px;
  color: var(--color-dark);
}

.tip-item p {
  font-size: 16px;
  color: var(--color-gray);
  line-height: 1.7;
}

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

.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
}

.contact-description {
  font-size: 18px;
  color: var(--color-gray);
  margin-bottom: 40px;
  line-height: 1.8;
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.contact-item {
  display: flex;
  gap: 20px;
}

.contact-item svg {
  width: 48px;
  height: 48px;
  color: var(--color-primary);
  flex-shrink: 0;
}

.contact-item h4 {
  font-size: 18px;
  margin-bottom: 8px;
  color: var(--color-dark);
}

.contact-item p {
  font-size: 16px;
  color: var(--color-gray);
  line-height: 1.6;
}

/* Contact Form */
.contact-form {
  background-color: var(--color-white);
  padding: 48px;
  border-radius: 12px;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
}

.contact-form h3 {
  font-size: 28px;
  margin-bottom: 32px;
  color: var(--color-dark);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.form-group {
  margin-bottom: 24px;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-dark);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 14px 16px;
  border: 2px solid var(--color-gray-light);
  border-radius: 8px;
  font-size: 16px;
  font-family: var(--font-main);
  transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
}

.form-group textarea {
  resize: vertical;
}

.submit-btn {
  width: 100%;
  padding: 16px;
  background-color: var(--color-primary);
  color: var(--color-white);
  border: none;
  border-radius: 8px;
  font-size: 18px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.submit-btn:hover {
  background-color: var(--color-secondary);
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(44, 95, 78, 0.3);
}

/* Footer */
.footer {
  background-color: var(--color-dark);
  color: var(--color-light);
  padding: 80px 0 32px;
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-logo {
  font-size: 28px;
  font-weight: bold;
  color: var(--color-accent);
  margin-bottom: 16px;
}

.footer-section p {
  color: var(--color-gray-light);
  line-height: 1.8;
  margin-top: 16px;
}

.footer-section h4 {
  font-size: 20px;
  margin-bottom: 24px;
  color: var(--color-white);
}

.footer-section ul {
  list-style: none;
}

.footer-section ul li {
  margin-bottom: 12px;
}

.footer-section ul li a {
  color: var(--color-gray-light);
  text-decoration: none;
  transition: var(--transition);
}

.footer-section ul li a:hover {
  color: var(--color-accent);
}

.social-links {
  display: flex;
  gap: 16px;
}

.social-links a {
  width: 44px;
  height: 44px;
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.social-links a:hover {
  background-color: var(--color-accent);
}

.social-links svg {
  width: 20px;
  height: 20px;
  color: var(--color-white);
}

.footer-bottom {
  text-align: center;
  padding-top: 32px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
  color: var(--color-gray);
  font-size: 15px;
}

/* Animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Responsive Design */
@media (max-width: 1024px) {
  .hero-title {
    font-size: 48px;
  }

  .hero-subtitle {
    font-size: 20px;
  }

  .section-title {
    font-size: 40px;
  }

  .method-card {
    grid-template-columns: 1fr;
  }

  .method-card:nth-child(even) {
    direction: ltr;
  }

  .tips-content {
    grid-template-columns: 1fr;
  }

  .contact-content {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .footer-content {
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 80px;
    left: -100%;
    flex-direction: column;
    background-color: var(--color-white);
    width: 100%;
    padding: 32px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
    gap: 20px;
  }

  .nav-menu.active {
    left: 0;
  }

  .mobile-menu-btn {
    display: flex;
  }

  .hero-title {
    font-size: 36px;
  }

  .hero-subtitle {
    font-size: 18px;
  }

  .section {
    padding: 64px 0;
  }

  .section-title {
    font-size: 32px;
    margin-bottom: 48px;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .benefits-grid {
    grid-template-columns: 1fr;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .tips-image {
    height: 400px;
  }
}

@media (max-width: 480px) {
  .nav-container {
    padding: 0 20px;
    height: 70px;
  }

  .logo {
    font-size: 22px;
  }

  .hero {
    min-height: 600px;
  }

  .hero-title {
    font-size: 28px;
  }

  .hero-subtitle {
    font-size: 16px;
  }

  .hero-btn {
    padding: 14px 32px;
    font-size: 16px;
  }

  .section-title {
    font-size: 28px;
  }

  .contact-form {
    padding: 32px 24px;
  }
}