:root {
  --bg-color: #F8F9FA;
  --primary-color-start: #FFD1A1;
  --primary-color-end: #FFB88C;
  --text-color: #333333;
  --white-color: #FFFFFF;
  --font-heading: 'Noto Sans JP', sans-serif;
  --font-body: 'Noto Sans JP', sans-serif;
}

body {
  background-color: var(--bg-color);
  color: var(--text-color);
  font-family: var(--font-body);
  line-height: 1.6;
  margin: 0;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
.header {
  background-color: var(--white-color);
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
  padding: 20px 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

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

.logo {
  font-family: var(--font-heading);
  font-size: 24px;
  font-weight: 700;
}

.nav a {
  margin: 0 15px;
  text-decoration: none;
  color: var(--text-color);
  transition: color 0.3s ease;
}

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

/* Buttons */
.btn {
  padding: 12px 25px;
  border-radius: 50px;
  text-decoration: none;
  font-weight: bold;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  font-size: 1.1rem;
}

.btn-primary {
  background: linear-gradient(45deg, var(--primary-color-start), var(--primary-color-end));
  color: var(--white-color);
}

.btn-secondary {
  background-color: var(--white-color);
  color: var(--primary-color-end);
  border: 2px solid var(--primary-color-end);
}

.btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 4px 10px rgba(0,0,0,0.1);
}

/* Hero Section */
.hero {
  position: relative;
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  top: 0; left: 0; width: 100%; height: 100%;
  background: url('../images/hero-product.jpg') center center/cover no-repeat;
  z-index: 1;
}
.hero::after {
  content: "";
  position: absolute;
  top: 0; left: 0; width: 100%; height: 100%;
  background: rgba(255,255,255,0.5); /* オーバーレイ */
  z-index: 2;
}
.hero .container, .hero-text {
  position: relative;
  z-index: 3;
  text-align: center;
  color: #222;
}
/* hero-textの背景を強化 */
.hero-text {
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(6px);
  display: inline-block;
  padding: 2rem 2.5rem;
  border-radius: 1.5rem;
  box-shadow: 0 4px 24px rgba(0,0,0,0.08);
  margin: 0 auto;
}
.hero-text h1 {
  font-size: 3rem;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1.2rem;
}
h1 {
  font-size: 2.5rem;
  font-weight: 700;
  line-height: 1.2;
}
h2 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 1.2rem;
}
h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 0.8rem;
}
p, li {
  font-size: 1rem;
  line-height: 1.7;
}
.btn {
  font-size: 1.1rem;
}

@media (max-width: 1024px) {
  h1 {
    font-size: 2rem;
  }
  h2 {
    font-size: 1.5rem;
  }
  h3 {
    font-size: 1.1rem;
  }
  p, li {
    font-size: 0.97rem;
  }
  .btn {
    font-size: 1rem;
  }
}
@media (max-width: 768px) {
  h1 {
    font-size: 1.5rem;
  }
  h2 {
    font-size: 1.2rem;
  }
  h3 {
    font-size: 1rem;
  }
  p, li {
    font-size: 0.93rem;
  }
  .btn {
    font-size: 0.97rem;
  }
  .hero {
    min-height: 40vh;
    padding: 40px 0;
  }
  .hero h1 {
    font-size: 1.5rem;
  }
  .hero-bg {
    background-position: center 30%;
  }
  .hero-text {
    padding: 1.2rem 1rem;
  }
  .hero-text h1 {
    font-size: 2rem;
  }
}

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

section h2 {
  font-family: var(--font-heading);
  font-size: 36px;
  text-align: center;
  margin-bottom: 60px;
}

/* Features Section */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
}

.feature-card {
  background-color: var(--white-color);
  padding: 40px;
  border-radius: 15px;
  box-shadow: 0 5px 15px rgba(0,0,0,0.05);
  text-align: center;
}

.feature-card h3 {
  font-family: var(--font-heading);
  font-size: 22px;
  margin-bottom: 15px;
}

.feature-icon {
  font-size: 2.5rem;
  color: #f7c948;
  display: block;
  margin: 0 auto 12px auto;
}

/* Voice Section */
.voice {
  background-color: var(--white-color);
}

.voice-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); /* Adjusted for 3 cards */
  gap: 30px;
}

.voice-card {
  background-color: var(--bg-color);
  padding: 30px;
  border-radius: 15px;
  border-left: 5px solid var(--primary-color-start);
}

.voice-card p {
  font-style: italic;
  margin-bottom: 20px;
}

.voice-card cite {
  font-weight: bold;
  font-style: normal;
}

.voice-icon {
  font-size: 2.2rem;
  color: #b3b3b3;
  display: block;
  margin: 0 auto 10px auto;
}

/* FAQ Section */
.faq-list {
  max-width: 700px;
  margin: 0 auto;
}

.faq-item {
  background-color: var(--white-color);
  padding: 20px;
  border-radius: 10px;
  margin-bottom: 15px;
  box-shadow: 0 2px 5px rgba(0,0,0,0.05);
}

.faq-item h3 {
  font-family: var(--font-heading);
  font-size: 18px;
  margin-bottom: 10px;
}

/* CTA Section */
.cta {
  background: linear-gradient(45deg, var(--primary-color-start), var(--primary-color-end));
  color: var(--white-color);
  text-align: center;
}

.cta h2 {
  color: var(--white-color);
}

.cta-box {
  background-color: var(--white-color);
  color: var(--text-color);
  padding: 40px;
  border-radius: 20px;
  max-width: 500px;
  margin: 40px auto 0;
  box-shadow: 0 10px 20px rgba(0,0,0,0.1);
}

.cta-box h3 {
  font-family: var(--font-heading);
  font-size: 28px;
  margin-bottom: 15px;
}

.price {
  font-size: 42px;
  font-weight: bold;
  margin-bottom: 15px;
}

.price span {
  font-size: 16px;
  font-weight: normal;
}

/* Footer */
.footer {
  background-color: #222222;
  color: #AAAAAA;
  text-align: center;
  padding: 30px 0;
}

/* ハンバーガーメニュー */
.hamburger {
  display: none;
  background: none;
  border: none;
  font-size: 2rem;
  color: #222;
  cursor: pointer;
  margin-left: 1rem;
}
@media (max-width: 768px) {
  .nav {
    display: none;
    position: absolute;
    top: 60px;
    left: 0;
    width: 100%;
    background: #fff;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    flex-direction: column;
    z-index: 100;
  }
  .nav.open {
    display: flex;
  }
  .hamburger {
    display: block;
  }
  .header .btn-primary {
    margin-left: 0;
  }
}