@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@300;400;500;700&family=Inter:wght@300;400;500;700&display=swap');
:root {
  --navy: #304771;
  --blue: #4c779e;
  --pale: #83adb4;
  --sand: #e3c49c;
  --latte: #edd7c0;
  --bg: #f7f4f0;
}
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body {
  font-family: 'Inter', 'Noto Sans JP', sans-serif;
  background: var(--bg);
  color: #2a2a2a;
  line-height: 1.7;
}

/* HEADER */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(247, 244, 240, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(131, 173, 180, 0.25);
  padding: 14px 0;
}
.header-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.logo {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--navy);
}
.logo-ai {
  color: var(--blue);
}
nav a {
  font-size: 13px;
  color: var(--blue);
  text-decoration: none;
  margin-left: 24px;
}
.btn-nav {
  background: var(--navy);
  color: #fff;
  padding: 8px 20px;
  border-radius: 20px;
  font-size: 13px;
  border: none;
  cursor: pointer;
  font-family: inherit;
  margin-left: 24px;
}

/* HERO */
.hero {
  min-height: 90vh;
  background: linear-gradient(
    150deg,
    #eef2f7 0%,
    var(--latte) 50%,
    rgba(131, 173, 180, 0.2) 100%
  );
  display: flex;
  align-items: center;
  padding: 80px 24px 60px;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -80px;
  right: -80px;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  background: radial-gradient(
    circle,
    rgba(76, 119, 158, 0.1) 0%,
    transparent 70%
  );
}
.hero-inner {
  max-width: 1080px;
  margin: 0 auto;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
}
.hero-text {
  flex: 1;
}
.badge {
  display: inline-block;
  background: rgba(76, 119, 158, 0.1);
  border: 1px solid rgba(76, 119, 158, 0.3);
  color: var(--blue);
  padding: 4px 14px;
  border-radius: 20px;
  font-size: 10px;
  letter-spacing: 1.5px;
  margin-bottom: 20px;
}
.hero h1 {
  font-family: inherit;
  font-size: 40px;
  font-weight: 300;
  line-height: 1.6;
  color: var(--navy);
  margin-bottom: 18px;
  animation: fadeUp 0.8s ease both;
}
.hero h1 strong {
  font-weight: 700;
  color: var(--blue);
}
.hero-sub {
  font-size: 15px;
  color: #5a6e82;
  line-height: 1.9;
  margin-bottom: 32px;
  animation: fadeUp 0.8s 0.2s ease both;
}
.hero-btns {
  display: flex;
  gap: 12px;
  animation: fadeUp 0.8s 0.4s ease both;
}
.btn-primary {
  background: linear-gradient(135deg, var(--navy), var(--blue));
  color: #fff;
  padding: 13px 30px;
  border-radius: 26px;
  border: none;
  cursor: pointer;
  font-size: 14px;
  font-family: inherit;
  box-shadow: 0 4px 18px rgba(48, 71, 113, 0.25);
  transition:
    transform 0.2s,
    box-shadow 0.2s;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 26px rgba(48, 71, 113, 0.35);
}
.btn-secondary {
  background: transparent;
  color: var(--navy);
  padding: 13px 26px;
  border-radius: 26px;
  border: 1.5px solid var(--pale);
  cursor: pointer;
  font-size: 14px;
  font-family: inherit;
  transition: background 0.2s;
}
.btn-secondary:hover {
  background: rgba(131, 173, 180, 0.1);
}
.hero-robo {
  width: 280px;
  flex-shrink: 0;
  animation: float 5s ease-in-out infinite;
}
.hero-robo img {
  width: 100%;
}

/* SECTIONS */
.section {
  padding: 72px 24px;
}
.section-inner {
  max-width: 1080px;
  margin: 0 auto;
}
.section-label {
  font-size: 10px;
  letter-spacing: 3px;
  color: var(--pale);
  text-transform: uppercase;
  margin-bottom: 10px;
}
.section-title {
  font-family: inherit;
  font-size: 26px;
  font-weight: 300;
  color: var(--navy);
  margin-bottom: 44px;
  line-height: 1.6;
  display: flex;
  align-items: center;
  gap: 12px;
}
.section-title img {
  width: 36px;
}
.text-center {
  text-align: center;
}
.section-title.centered {
  justify-content: center;
  font-size: 30px;
  font-weight: 800;
}

/* TWO COLUMN */
.two-col {
  display: flex;
  align-items: center;
  gap: 48px;
}
.two-col.reverse {
  flex-direction: row-reverse;
}
.col-text {
  flex: 1;
}
.robo-side {
  width: 200px;
  flex-shrink: 0;
  animation: float 5s ease-in-out infinite;
}
.robo-side img {
  width: 100%;
}

/* BOX LIST */
.box-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.box {
  padding: 18px 20px;
  border-radius: 12px;
  border: 2px solid transparent;
  font-size: 14px;
}
.box-cyan {
  background: rgba(131, 173, 180, 0.12);
  border-color: rgba(131, 173, 180, 0.4);
  font-weight: 500;
}
.box-sand {
  background: rgba(237, 215, 192, 0.3);
  border-color: rgba(227, 196, 156, 0.4);
}

/* FEATURES */
.features-bg {
  background: linear-gradient(160deg, var(--navy) 0%, #1e3356 100%);
  padding: 72px 24px;
  position: relative;
  overflow: hidden;
}
.features-bg::before {
  content: '';
  position: absolute;
  top: -30%;
  left: -10%;
  width: 120%;
  height: 160%;
  background: radial-gradient(
    ellipse at 60% 40%,
    rgba(131, 173, 180, 0.1) 0%,
    transparent 60%
  );
}
.features-bg .section-label {
  color: var(--pale);
}
.features-bg .section-title {
  color: #fff;
}
.three-col {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  position: relative;
  z-index: 1;
}
.feat-card {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(131, 173, 180, 0.2);
  border-radius: 14px;
  padding: 24px 18px;
  transition:
    background 0.2s,
    transform 0.2s;
}
.feat-card:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-4px);
}
.feat-icon {
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.feat-icon-dot {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--pale);
  box-shadow: 0 0 0 4px rgba(131, 173, 180, 0.12);
}
.feat-title {
  font-size: 16px;
  font-weight: 800;
  color: var(--sand);
  margin-bottom: 8px;
  letter-spacing: 0.2px;
}
.feat-text {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.6);
  line-height: 1.7;
}

/* VOICES */
.voice-list {
  display: flex;
  flex-direction: column;
  gap: 18px;
  max-width: 700px;
  margin: 0 auto;
}
.voice-box {
  background: #fff;
  border: 1.5px solid rgba(131, 173, 180, 0.3);
  border-radius: 14px;
  padding: 24px 28px;
  box-shadow: 0 2px 12px rgba(48, 71, 113, 0.06);
}
.voice-box p {
  font-size: 15px;
  color: var(--navy);
  line-height: 1.8;
}
.voice-author {
  display: block;
  text-align: right;
  font-size: 12px;
  color: var(--pale);
  margin-top: 10px;
}

/* PWA SECTION */
.pwa-section {
  background: linear-gradient(
    160deg,
    rgba(131, 173, 180, 0.08) 0%,
    var(--latte) 100%
  );
  padding: 72px 24px;
}
.pwa-inner {
  max-width: 780px;
  margin: 0 auto;
}
.url-card {
  background: #fff;
  border-radius: 16px;
  padding: 32px;
  box-shadow: 0 4px 24px rgba(48, 71, 113, 0.08);
  margin-bottom: 32px;
  text-align: center;
}
.url-card p {
  font-size: 14px;
  color: #5a6e82;
  margin-bottom: 20px;
  line-height: 1.8;
}
.url-box {
  background: rgba(48, 71, 113, 0.04);
  border: 1.5px solid rgba(76, 119, 158, 0.25);
  border-radius: 10px;
  padding: 14px 20px;
  font-family: monospace;
  font-size: 15px;
  color: var(--navy);
  margin-bottom: 20px;
  word-break: break-all;
}
.pwa-card {
  background: #fff;
  border-radius: 16px;
  padding: 32px;
  box-shadow: 0 4px 24px rgba(48, 71, 113, 0.08);
}
.pwa-card-title {
  font-size: 15px;
  font-weight: 500;
  color: var(--navy);
  margin-bottom: 20px;
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(131, 173, 180, 0.25);
  display: flex;
  align-items: center;
  gap: 8px;
}
.pwa-tabs {
  display: flex;
  gap: 10px;
  margin-bottom: 24px;
}
.pwa-tab {
  flex: 1;
  padding: 10px;
  border-radius: 10px;
  border: 2px solid var(--pale);
  background: transparent;
  font-size: 13px;
  cursor: pointer;
  font-family: inherit;
  color: var(--blue);
  transition: all 0.2s;
}
.pwa-tab.active {
  background: var(--navy);
  border-color: var(--navy);
  color: #fff;
}
.pwa-steps {
  display: none;
}
.pwa-steps.active {
  display: block;
}
.pwa-step-item {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  margin-bottom: 16px;
  padding: 14px;
  background: rgba(131, 173, 180, 0.06);
  border-radius: 10px;
}
.pwa-step-num {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--navy), var(--blue));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 13px;
  flex-shrink: 0;
}
.pwa-step-text strong {
  display: block;
  font-size: 13px;
  color: var(--navy);
  margin-bottom: 3px;
}
.pwa-step-text span {
  font-size: 12px;
  color: #6b7f8e;
  line-height: 1.6;
}
.pwa-note {
  font-size: 12px;
  color: var(--pale);
  margin-top: 16px;
  padding: 10px 14px;
  background: rgba(131, 173, 180, 0.08);
  border-radius: 8px;
  border-left: 3px solid var(--pale);
}

/* NEWS */
.news-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 780px;
  margin: 0 auto;
}
.news-item {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: 16px 20px;
  background: #fff;
  border-radius: 12px;
  border: 1px solid rgba(131, 173, 180, 0.2);
  transition: box-shadow 0.2s;
}
.news-item:hover {
  box-shadow: 0 4px 16px rgba(48, 71, 113, 0.08);
}
.news-date {
  font-size: 12px;
  color: var(--pale);
  white-space: nowrap;
  margin-top: 2px;
  min-width: 80px;
}
.news-badge {
  background: rgba(76, 119, 158, 0.1);
  color: var(--blue);
  font-size: 10px;
  padding: 2px 8px;
  border-radius: 10px;
  white-space: nowrap;
  margin-top: 2px;
}
.news-title {
  font-size: 14px;
  color: var(--navy);
  line-height: 1.6;
}
.news-content {
  flex: 1;
  min-width: 0;
}
.news-toggle {
  width: 100%;
  padding: 0;
  border: none;
  background: transparent;
  font: inherit;
  color: inherit;
  text-align: left;
  cursor: pointer;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}
.news-toggle::after {
  content: '＋';
  color: var(--pale);
  font-size: 18px;
  line-height: 1;
  flex-shrink: 0;
  margin-top: 1px;
}
.news-toggle.open::after {
  content: '－';
}
.news-detail {
  max-height: 0;
  overflow: hidden;
  transition:
    max-height 0.3s,
    padding-top 0.3s;
}
.news-detail.open {
  max-height: 200px;
  padding-top: 12px;
}
.news-detail p {
  font-size: 13px;
  color: #5a6e82;
  line-height: 1.8;
  white-space: normal;
  text-align: left;
}

/* FAQ */
.faq-list {
  max-width: 700px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.faq-item {
  background: #fff;
  border: 1px solid rgba(131, 173, 180, 0.25);
  border-radius: 12px;
  overflow: hidden;
}
.faq-q {
  padding: 18px 20px;
  font-weight: 500;
  color: var(--navy);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 14px;
}
.faq-q::after {
  content: '＋';
  color: var(--pale);
  font-size: 18px;
}
.faq-q.open::after {
  content: '－';
}
.faq-a {
  padding: 0 20px;
  max-height: 0;
  overflow: hidden;
  transition:
    max-height 0.3s,
    padding 0.3s;
  font-size: 13px;
  color: #5a6e82;
  line-height: 1.8;
}
.faq-a.open {
  max-height: 200px;
  padding: 0 20px 18px;
}

/* CTA */
.cta-section {
  padding: 90px 24px;
  text-align: center;
  background: linear-gradient(
    160deg,
    rgba(48, 71, 113, 0.04) 0%,
    var(--latte) 100%
  );
}
.cta-robo {
  width: 130px;
  margin: 0 auto 20px;
  animation: float 4s ease-in-out infinite;
}
.cta-robo img {
  width: 100%;
}
.cta-title {
  font-family: inherit;
  font-size: 28px;
  font-weight: 800;
  color: var(--navy);
  margin-bottom: 14px;
}
.cta-sub {
  font-size: 14px;
  color: #6b7f8e;
  margin-bottom: 32px;
}
.cta-btns {
  display: flex;
  gap: 12px;
  justify-content: center;
}

/* FOOTER */
footer {
  background: #1a2a40;
  padding: 32px 24px;
}
.footer-inner {
  max-width: 1080px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 12px;
}
.footer-logo {
  font-size: 18px;
  color: rgba(255, 255, 255, 0.85);
  letter-spacing: 2px;
  font-weight: 700;
}
.footer-links {
  display: flex;
  gap: 20px;
}
.footer-links a {
  color: rgba(255, 255, 255, 0.65);
  text-decoration: none;
  transition: color 0.2s;
}
.footer-links a:hover {
  color: #fff;
}
.footer-copy {
  color: rgba(255, 255, 255, 0.45);
}

/* ANIMATIONS */
@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
@keyframes float {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition:
    opacity 0.7s,
    transform 0.7s;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* RESPONSIVE */
@media (min-width: 769px) {
  .hero-inner {
    max-width: 640px;
    margin: 0 auto;
    justify-content: center;
    align-items: center;
    gap: 16px;
  }
  .hero-text {
    flex: 0 1 480px;
    max-width: 480px;
    transform: translateY(-18px);
  }
  .hero-robo {
    width: 260px;
    flex: 0 0 260px;
  }
}

@media (max-width: 768px) {
  nav a {
    display: none;
  }
  .hero-inner {
    flex-direction: column;
    text-align: center;
  }
  .hero h1 {
    font-size: 28px;
  }
  .hero-btns {
    justify-content: center;
  }
  .hero-robo {
    width: 180px;
  }
  .hero-robo img {
    mix-blend-mode: multiply;
    background: transparent;
  }
  .two-col,
  .two-col.reverse {
    flex-direction: column;
  }
  .three-col {
    grid-template-columns: 1fr;
  }
}