:root {
  --navy: #08243a;
  --blue: #0b6fa4;
  --blue-dark: #07547c;
  --blue-light: #eaf7fc;
  --sky: #dff5fc;
  --green: #0d7f45;
  --green-dark: #08743c;
  --text: #173042;
  --muted: #607482;
  --white: #ffffff;
  --line: #dce7ed;
  --surface: #f7fafb;
  --shadow: 0 18px 50px rgba(8, 36, 58, 0.09);
  --radius: 22px;
  --container: 1120px;
}

* {
  box-sizing: border-box;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  background: var(--white);
  font-family:
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    "Noto Sans JP",
    "Hiragino Kaku Gothic ProN",
    "Yu Gothic",
    sans-serif;
  line-height: 1.7;
}

a {
  color: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

.container {
  width: min(calc(100% - 40px), var(--container));
  margin: 0 auto;
}


/* Header */

.site-header {
  position: sticky;
  z-index: 50;
  top: 0;
  border-bottom: 1px solid rgba(220, 231, 237, 0.8);
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(12px);
}

.header-inner {
  display: flex;
  min-height: 72px;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--navy);
  text-decoration: none;
}

.brand-logo {
  display: block;
  width: 44px;
  height: 44px;
  flex: 0 0 44px;
  border-radius: 50%;
  object-fit: cover;
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  font-size: 16px;
}

.brand small {
  margin-top: -3px;
  color: var(--muted);
  font-size: 11px;
  letter-spacing: 0.08em;
}

.global-nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

.global-nav > a {
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
}

.global-nav > a:not(.nav-cta):hover {
  color: var(--blue);
}

.nav-cta {
  padding: 11px 18px;
  border-radius: 999px;
  color: var(--white);
  background: var(--green);
}

.nav-cta:hover {
  background: var(--green-dark);
}

.menu-button {
  display: none;
}


/* Hero */

.hero {
  overflow: hidden;
  background:
    radial-gradient(circle at 75% 15%, #d7f5ff 0, transparent 30%),
    linear-gradient(145deg, #f9fdff 0%, #e7f7fc 100%);
}

.hero-inner {
  display: grid;
  min-height: 650px;
  grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  align-items: center;
  gap: 60px;
  padding-top: 72px;
  padding-bottom: 72px;
}

.eyebrow,
.section-kicker {
  margin: 0 0 13px;
  color: var(--blue);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.16em;
}

.hero h1 {
  margin: 0;
  color: var(--navy);
  font-size: clamp(42px, 6vw, 72px);
  line-height: 1.18;
  letter-spacing: -0.04em;
}

.mobile-break {
  display: none;
}

.hero-title-nowrap {
  white-space: nowrap;
}

.hero-lead {
  max-width: 680px;
  margin: 26px 0 0;
  color: var(--text);
  font-size: 20px;
  font-weight: 700;
}

.hero-sub {
  max-width: 650px;
  margin: 15px 0 0;
  color: var(--muted);
  font-size: 15px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.button {
  display: inline-flex;
  min-height: 52px;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 0 24px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-weight: 800;
  text-decoration: none;
  transition:
    transform 0.18s ease,
    background 0.18s ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button-line {
  color: var(--white);
  background: var(--green);
  box-shadow: 0 12px 28px rgba(25, 183, 103, 0.25);
}

.button-line:hover {
  background: var(--green-dark);
}

.button-secondary {
  border-color: var(--line);
  color: var(--navy);
  background: var(--white);
}

.button-large {
  min-height: 58px;
  padding-right: 30px;
  padding-left: 30px;
}

.hero-points {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.hero-points li {
  padding: 6px 11px;
  border: 1px solid #cde2eb;
  border-radius: 999px;
  color: var(--blue-dark);
  background: rgba(255, 255, 255, 0.65);
  font-size: 12px;
  font-weight: 700;
}

.hero-visual {
  margin: 0;
  overflow: hidden;
  width: 100%;
  min-width: 0;
  max-width: 100%;
  min-height: 420px;
  border-radius: 36px;
  background: var(--blue-light);
  box-shadow: var(--shadow);
}

.hero-photo img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: 100%;
  min-height: 420px;
  object-fit: cover;
  object-position: center;
}

/* Sections */

.section {
  padding: 100px 0;
}

.section-soft {
  background: var(--surface);
}

.section-heading {
  max-width: 650px;
  margin: 0 auto 48px;
  text-align: center;
}

.section-heading h2 {
  margin: 0;
  color: var(--navy);
  font-size: clamp(30px, 5vw, 44px);
  line-height: 1.25;
}

.section-heading > p:last-child {
  margin: 14px 0 0;
  color: var(--muted);
}

.feature-grid,
.voice-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.feature-card,
.voice-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
  box-shadow: 0 8px 30px rgba(8, 36, 58, 0.045);
}

.feature-card {
  padding: 34px;
}

.feature-image {
  margin: 0 0 24px;
  overflow: hidden;
  width: 100%;
  min-width: 0;
  max-width: 100%;
  aspect-ratio: 1;
  border-radius: 17px;
  background: var(--blue-light);
}

.feature-image img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: 100%;
  object-fit: cover;
}

.feature-card h3,
.step h3 {
  margin: 0;
  color: var(--navy);
}

.feature-card p,
.step p {
  margin: 11px 0 0;
  color: var(--muted);
}

.voice-grid {
  grid-template-columns: repeat(2, 1fr);
}

.voice-card {
  padding: 30px;
}

.voice-card p {
  margin: 0;
  color: var(--navy);
  font-size: 17px;
  font-weight: 650;
}

.voice-card span {
  display: block;
  margin-top: 18px;
  color: var(--muted);
  font-size: 13px;
}


/* Steps */

.steps {
  display: grid;
  max-width: 850px;
  gap: 18px;
  margin: 0 auto;
  padding: 0;
  list-style: none;
}

.step {
  display: grid;
  grid-template-columns: 74px 1fr;
  align-items: center;
  gap: 22px;
  padding: 27px 30px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
}

.step-number {
  color: var(--blue);
  font-size: 28px;
  font-weight: 900;
}

.center-action {
  margin-top: 38px;
  text-align: center;
}


/* FAQ */

.faq-container {
  max-width: 900px;
}

.faq-list {
  display: grid;
  gap: 12px;
}

.faq-list details {
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--white);
}

.faq-list summary {
  position: relative;
  padding: 21px 52px 21px 22px;
  color: var(--navy);
  font-weight: 750;
  cursor: pointer;
  list-style: none;
}

.faq-list summary::-webkit-details-marker {
  display: none;
}

.faq-list summary::after {
  position: absolute;
  top: 50%;
  right: 22px;
  content: "+";
  color: var(--blue);
  font-size: 24px;
  transform: translateY(-50%);
}

.faq-list details[open] summary::after {
  content: "−";
}

.faq-list details p {
  margin: 0;
  padding: 0 22px 22px;
  color: var(--muted);
}


/* Final CTA */

.final-cta {
  color: var(--white);
  background:
    radial-gradient(circle at 75% 10%, #168bc0 0, transparent 32%),
    var(--navy);
}

.final-cta-inner {
  padding-top: 85px;
  padding-bottom: 85px;
  text-align: center;
}

.section-kicker-light {
  color: #8bdcf6;
}

.final-cta h2 {
  margin: 0;
  font-size: clamp(34px, 6vw, 54px);
  line-height: 1.3;
}

.final-cta p {
  margin: 18px auto 30px;
  color: #d3e6ef;
}


/* Footer */

.site-footer {
  border-top: 1px solid var(--line);
  background: var(--white);
}

.footer-inner {
  display: flex;
  min-height: 120px;
  align-items: center;
  justify-content: space-between;
}

.footer-inner strong {
  color: var(--navy);
}

.footer-inner p {
  margin: 2px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.copyright {
  text-align: right;
}

/* Sub pages */

.subpage-hero-with-image {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.8fr);
  align-items: center;
  gap: 48px;
}

.subpage-hero-copy {
  min-width: 0;
}

.subpage-hero-image {
  margin: 0;
  overflow: hidden;
  width: 100%;
  min-width: 0;
  max-width: 100%;  
  border-radius: 28px;
  background: var(--blue-light);
  box-shadow: var(--shadow);
}

.subpage-hero-image img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: 320px;
  object-fit: cover;
  object-position: center;
}

.subpage-hero {
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(circle at 80% 20%, #d7f5ff 0, transparent 30%),
    linear-gradient(145deg, #f9fdff 0%, #eaf7fc 100%);
}

.subpage-hero-inner {
  padding-top: 70px;
  padding-bottom: 70px;
}

.subpage-hero h1 {
  margin: 0;
  color: var(--navy);
  font-size: clamp(38px, 6vw, 58px);
  line-height: 1.25;
}

.privacy-title {
  white-space: nowrap;
}

.subpage-hero-copy > p:last-child {
  max-width: 680px;
  margin: 18px 0 0;
  color: var(--muted);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 32px;
  color: var(--muted);
  font-size: 13px;
}

.breadcrumb a {
  color: var(--blue);
  text-decoration: none;
}

.breadcrumb a:hover {
  text-decoration: underline;
}

.faq-contact-card {
  margin-top: 50px;
  padding: 40px;
  border-radius: var(--radius);
  background: var(--blue-light);
  text-align: center;
}

.faq-contact-card h2 {
  margin: 0;
  color: var(--navy);
  font-size: clamp(25px, 4vw, 34px);
}

.faq-contact-card > p:not(.section-kicker) {
  margin: 13px 0 25px;
  color: var(--muted);
}

.footer-brand {
  color: var(--navy);
  text-decoration: none;
}

/* Legal pages */

.legal-content {
  max-width: 900px;
}

.legal-content > p:first-child {
  margin-top: 0;
}

.legal-section {
  margin-top: 48px;
}

.legal-section:first-child {
  margin-top: 0;
}

.legal-section h2 {
  margin: 0 0 18px;
  color: var(--navy);
  font-size: clamp(21px, 3vw, 27px);
  line-height: 1.45;
}

.legal-section p,
.legal-section li {
  color: var(--text);
}

.legal-section ol,
.legal-section ul {
  display: grid;
  gap: 10px;
  margin: 18px 0 0;
  padding-left: 1.6em;
}

.legal-section a,
.legal-table a {
  color: var(--blue);
}

.legal-date {
  margin-top: 55px;
  color: var(--muted);
}

.legal-table {
  margin: 0;
  border-top: 1px solid var(--line);
}

.legal-table > div {
  display: grid;
  grid-template-columns: 220px 1fr;
  border-bottom: 1px solid var(--line);
}

.legal-table dt,
.legal-table dd {
  margin: 0;
  padding: 22px;
}

.legal-table dt {
  color: var(--navy);
  background: var(--surface);
  font-weight: 800;
}

.legal-table dd {
  color: var(--text);
}

.footer-inner-legal {
  gap: 30px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px 20px;
}

.footer-links a {
  color: var(--muted);
  font-size: 13px;
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--blue);
  text-decoration: underline;
}

@media (max-width: 760px) {
  .legal-table > div {
    grid-template-columns: 1fr;
  }

  .legal-table dt {
    padding-bottom: 10px;
  }

  .legal-table dd {
    padding-top: 10px;
  }

  .footer-inner-legal {
    min-height: auto;
    padding-top: 35px;
    padding-bottom: 35px;
  }

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

/* Mobile */

@media (max-width: 860px) {
  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 45px;
    min-width: 0;
  }
  .hero-copy,
  .hero-visual,
  .subpage-hero-copy,
  .subpage-hero-image {
    min-width: 0;
    max-width: 100%;
  }

  .hero-visual {
    min-height: 350px;
  }

  .hero-photo img {
    min-height: 350px;
  }

  .subpage-hero-with-image {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .subpage-hero-image img {
    height: 300px;
  }

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

  .menu-button {
    display: flex;
    width: 42px;
    height: 42px;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    border: 0;
    background: transparent;
    cursor: pointer;
  }

  .menu-button span {
    width: 22px;
    height: 2px;
    background: var(--navy);
  }

  .global-nav {
    position: absolute;
    top: 72px;
    right: 0;
    left: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px 20px 20px;
    border-bottom: 1px solid var(--line);
    background: var(--white);
  }

  .global-nav.is-open {
    display: flex;
  }

  .global-nav > a {
    padding: 13px 4px;
  }

  .global-nav .nav-cta {
    margin-top: 8px;
    padding: 13px 18px;
    text-align: center;
  }
}

@media (max-width: 640px) {
  .container {
    width: min(calc(100% - 30px), var(--container));
  }

  .brand-logo {
    width: 40px;
    height: 40px;
    flex-basis: 40px;
  }

  .hero-inner {
    min-height: auto;
    gap: 28px;
    padding-top: 12px;
    padding-bottom: 44px;
  }

  .hero h1 {
    font-size: clamp(36px, 10.5vw, 40px);
  }

  .hero-visual {
    min-height: 0;
    aspect-ratio: 16 / 9;
    border-radius: 24px;
  }

  .hero-photo img {
    height: 100%;
    min-height: 0;
  }

  .mobile-break {
    display: inline;
  }  

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

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

  .button {
    width: 100%;
  }

  .section {
    padding: 72px 0;
  }

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

  .step {
    grid-template-columns: 1fr;
    gap: 8px;
    padding: 24px;
  }

  .footer-inner {
    min-height: 140px;
    flex-direction: column;
    justify-content: center;
    gap: 10px;
    text-align: center;
  }

  .copyright {
    text-align: center;
  }

  #features.section,
  #voices.section,
  #howto.section,
  #faq.section {
    padding-top: 48px;
    padding-bottom: 48px;
  }

  #features .section-heading {
    margin-bottom: 24px;
  }

  #features .feature-grid {
    gap: 12px;
  }

  #features .feature-card {
    padding: 16px 18px 14px;
  }

  #features .feature-image {
    width: min(100%, 200px);
    margin: 0 auto 12px;
  }

  #features .feature-card p {
    margin-top: 5px;
  }

  .faq-page-section {
    padding-top: 48px;
    padding-bottom: 48px;
  }

  #faq .section-heading {
    margin-bottom: 24px;
  }

  .faq-list {
    gap: 10px;
  }

  .faq-list summary {
    padding: 18px 48px 18px 18px;
  }

  .faq-list summary::after {
    right: 18px;
  }

  .faq-list details p {
    padding: 0 18px 18px;
  }

  .subpage-hero-inner {
    padding-top: 48px;
    padding-bottom: 48px;
  }

  .privacy-title {
    font-size: clamp(30px, 8.5vw, 36px);
  }

  .subpage-hero-with-image {
    gap: 24px;
  }

  .subpage-hero-image img {
    height: 220px;
  }

  .final-cta-inner {
    padding-top: 48px;
    padding-bottom: 48px;
  }

  .final-cta p {
    margin-top: 14px;
    margin-bottom: 24px;
  }
  .faq-contact-card {
    margin-top: 24px;
    padding: 24px 20px;
  }

  .faq-contact-card > p:not(.section-kicker) {
    margin-top: 10px;
    margin-bottom: 18px;
  }

  #voices .section-heading {
    margin-bottom: 24px;
  }

  #voices .voice-grid {
    gap: 12px;
  }

  #voices .voice-card {
    padding: 20px 18px;
  }

  #voices .voice-card span {
    margin-top: 10px;
  }

  #howto .section-heading {
    margin-bottom: 24px;
  }
}  

/* Blog */

.article-header {
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(circle at 80% 20%, #d7f5ff 0, transparent 30%),
    linear-gradient(145deg, #f9fdff 0%, #eaf7fc 100%);
}

.article-container {
  max-width: 820px;
}

.article-header .article-container {
  padding-top: 70px;
  padding-bottom: 60px;
}

.article-header h1 {
  margin: 0;
  color: var(--navy);
  font-size: clamp(36px, 6vw, 56px);
  line-height: 1.3;
}

.article-description {
  margin: 20px 0 0;
  color: var(--muted);
  font-size: 18px;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  margin-top: 24px;
  color: var(--muted);
  font-size: 13px;
}

.article-body {
  padding-top: 70px;
  padding-bottom: 90px;
}

.article-body > p {
  margin: 0 0 26px;
}

.article-body > h2 {
  margin: 55px 0 20px;
  color: var(--navy);
  font-size: clamp(25px, 4vw, 33px);
  line-height: 1.45;
}

.article-body > h3 {
  margin: 40px 0 16px;
  color: var(--navy);
  font-size: 22px;
}

.article-body img {
  display: block;
  width: 100%;
  height: auto;
  margin: 32px 0;
  border-radius: var(--radius);
}

.article-cta {
  margin-top: 65px;
  padding: 38px;
  border-radius: var(--radius);
  background: var(--blue-light);
  text-align: center;
}

.article-cta h2 {
  margin: 0;
  color: var(--navy);
  font-size: clamp(24px, 4vw, 32px);
}

.article-cta > p:not(.section-kicker) {
  margin: 14px 0 25px;
  color: var(--muted);
}

.article-navigation {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-top: 50px;
}

.article-navigation a {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 14px;
  color: var(--blue);
  text-decoration: none;
}

.article-navigation a:last-child {
  text-align: right;
}

.article-share {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 40px;
  padding-top: 25px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}

.article-share p {
  width: 100%;
  margin: 0;
  color: var(--navy);
  font-weight: 800;
}

.article-share span {
  padding: 6px 11px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--white);
}

@media (max-width: 640px) {
  .article-navigation {
    grid-template-columns: 1fr;
  }

  .article-navigation a:last-child {
    text-align: left;
  }

  .article-cta {
    padding: 28px 22px;
  }
}