:root {
  --ink: #172033;
  --muted: #5f6878;
  --paper: #ffffff;
  --soft: #f4f6f8;
  --line: #dce1e8;
  --blue: #3268e8;
  --blue-dark: #1847b8;
  --yellow: #f6c900;
  --green: #7ebc63;
  --max-width: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", "Noto Sans JP", sans-serif;
  line-height: 1.75;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  display: block;
  max-width: 100%;
}

.site-frame {
  min-height: 100vh;
}

.site-header {
  align-items: center;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  min-height: 72px;
  padding: 10px max(24px, calc((100vw - var(--max-width)) / 2));
  position: sticky;
  top: 0;
  z-index: 10;
}

.brand {
  align-items: center;
  display: inline-flex;
  font-size: 1.18rem;
  font-weight: 800;
  gap: 10px;
}

.brand img {
  border-radius: 8px;
  height: 44px;
  width: 44px;
}

.site-header nav {
  align-items: center;
  display: flex;
  font-size: 0.92rem;
  font-weight: 650;
  gap: 26px;
}

.site-header nav a,
.footer-links a {
  color: var(--muted);
}

.site-header nav a:hover,
.footer-links a:hover,
.text-link:hover {
  color: var(--blue-dark);
}

.hero {
  align-items: center;
  display: grid;
  gap: 64px;
  grid-template-columns: minmax(0, 1.3fr) minmax(260px, 0.7fr);
  margin: 0 auto;
  max-width: var(--max-width);
  min-height: min(680px, calc(100vh - 72px));
  padding: 76px 24px 88px;
}

.eyebrow {
  color: var(--blue-dark);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0;
  margin: 0 0 12px;
  text-transform: uppercase;
}

.hero h1 {
  font-size: clamp(3.5rem, 8vw, 6.8rem);
  line-height: 0.98;
  margin: 0;
}

.hero-lead {
  font-size: clamp(1.35rem, 3vw, 2rem);
  font-weight: 750;
  margin: 26px 0 10px;
}

.hero-description {
  color: var(--muted);
  font-size: 1.04rem;
  margin: 0;
  max-width: 620px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.primary-link,
.secondary-link {
  align-items: center;
  border-radius: 7px;
  display: inline-flex;
  font-size: 0.94rem;
  font-weight: 750;
  justify-content: center;
  min-height: 48px;
  padding: 10px 20px;
}

.primary-link {
  background: var(--blue);
  color: white;
}

.primary-link:hover {
  background: var(--blue-dark);
}

.secondary-link {
  border: 1px solid var(--line);
}

.secondary-link:hover {
  border-color: var(--blue);
  color: var(--blue-dark);
}

.hero-visual {
  justify-self: end;
  width: min(360px, 100%);
}

.hero-visual img {
  border: 1px solid #eef0f3;
  border-radius: 22%;
  box-shadow: 0 24px 55px rgba(38, 55, 87, 0.18);
  height: auto;
  width: 100%;
}

.content-band,
.data-band,
.document-page {
  margin: 0 auto;
  max-width: var(--max-width);
  padding-left: 24px;
  padding-right: 24px;
}

.content-band {
  border-top: 1px solid var(--line);
  padding-bottom: 104px;
  padding-top: 92px;
}

.section-heading {
  max-width: 720px;
}

.section-heading h2,
.data-band h2,
.contact-band h2,
.delete-guide h2 {
  font-size: clamp(1.7rem, 4vw, 2.55rem);
  line-height: 1.3;
  margin: 0;
}

.feature-grid {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 44px;
}

.feature-item,
.support-item {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 28px;
}

.feature-item {
  border-top-width: 5px;
}

.blue-accent {
  border-top-color: var(--blue);
}

.yellow-accent {
  border-top-color: var(--yellow);
}

.green-accent {
  border-top-color: var(--green);
}

.feature-number {
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 800;
}

.feature-item h3,
.support-item h3 {
  font-size: 1.08rem;
  margin: 14px 0 8px;
}

.feature-item p,
.support-item p {
  color: var(--muted);
  margin: 0;
}

.data-band {
  align-items: start;
  background: var(--soft);
  display: grid;
  gap: 56px;
  grid-template-columns: 1fr 1fr;
  max-width: none;
  padding-bottom: 90px;
  padding-left: max(24px, calc((100vw - var(--max-width)) / 2));
  padding-right: max(24px, calc((100vw - var(--max-width)) / 2));
  padding-top: 90px;
}

.data-copy p {
  color: var(--muted);
  margin: 0 0 18px;
}

.text-link {
  color: var(--blue-dark);
  font-weight: 750;
  text-decoration: underline;
  text-decoration-color: rgba(50, 104, 232, 0.35);
  text-underline-offset: 5px;
}

.site-footer {
  align-items: start;
  border-top: 1px solid var(--line);
  display: grid;
  font-size: 0.86rem;
  gap: 24px;
  grid-template-columns: 1fr auto auto;
  margin: 0 auto;
  max-width: var(--max-width);
  padding: 36px 24px 44px;
}

.footer-brand {
  font-weight: 800;
}

.footer-links {
  display: flex;
  gap: 20px;
}

.site-footer p {
  color: var(--muted);
  margin: 0;
}

.document-page {
  padding-bottom: 112px;
  padding-top: 76px;
}

.document-header {
  border-bottom: 1px solid var(--line);
  padding-bottom: 56px;
}

.document-header h1 {
  font-size: clamp(2.35rem, 6vw, 4.6rem);
  line-height: 1.12;
  margin: 0;
}

.document-intro {
  color: var(--muted);
  font-size: 1.06rem;
  margin: 24px 0 0;
  max-width: 760px;
}

.updated-date {
  color: var(--muted);
  font-size: 0.84rem;
  margin: 24px 0 0;
}

.document-body {
  margin: 0 auto;
  max-width: 800px;
  padding-top: 32px;
}

.document-body section {
  border-bottom: 1px solid var(--line);
  padding: 38px 0;
}

.document-body h2 {
  font-size: 1.42rem;
  line-height: 1.4;
  margin: 0 0 16px;
}

.document-body h3 {
  font-size: 1rem;
  margin: 24px 0 6px;
}

.document-body p {
  color: #3f495a;
  margin: 0;
}

.document-body ul {
  color: #3f495a;
  margin: 0;
  padding-left: 1.4rem;
}

.document-body li + li {
  margin-top: 8px;
}

.important-section {
  border-left: 5px solid var(--yellow);
  padding-left: 24px !important;
}

.support-list {
  padding: 70px 0 0;
}

.support-grid {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 34px;
}

.support-item h3 {
  margin-top: 0;
}

.contact-band {
  background: var(--ink);
  border-radius: 8px;
  color: white;
  display: grid;
  gap: 48px;
  grid-template-columns: 0.8fr 1.2fr;
  margin-top: 72px;
  padding: 42px;
}

.contact-band .eyebrow {
  color: #9fbcff;
}

.contact-band p {
  color: #e2e6ee;
  margin: 0;
}

.contact-band .contact-note {
  color: #aeb7c7;
  font-size: 0.88rem;
  margin-top: 14px;
}

.contact-band .contact-email {
  font-weight: 750;
  margin-top: 18px;
}

.contact-email a {
  color: white;
  overflow-wrap: anywhere;
  text-decoration: underline;
  text-decoration-color: #9fbcff;
  text-underline-offset: 5px;
}

.delete-guide {
  border-top: 1px solid var(--line);
  margin-top: 80px;
  padding-top: 64px;
}

.delete-guide ol {
  counter-reset: steps;
  display: grid;
  gap: 10px;
  list-style: none;
  margin: 32px 0;
  padding: 0;
}

.delete-guide li {
  align-items: center;
  border-bottom: 1px solid var(--line);
  display: grid;
  gap: 14px;
  grid-template-columns: 36px 1fr;
  padding: 14px 0;
}

.delete-guide li::before {
  align-items: center;
  background: var(--blue);
  border-radius: 50%;
  color: white;
  content: counter(list-item);
  display: flex;
  font-size: 0.8rem;
  font-weight: 800;
  height: 32px;
  justify-content: center;
  width: 32px;
}

.delete-guide > p {
  color: var(--muted);
  max-width: 820px;
}

@media (max-width: 760px) {
  .site-header {
    min-height: 64px;
    padding-left: 16px;
    padding-right: 16px;
  }

  .brand img {
    height: 38px;
    width: 38px;
  }

  .site-header nav {
    font-size: 0.82rem;
    gap: 14px;
  }

  .hero {
    gap: 36px;
    grid-template-columns: 1fr;
    min-height: auto;
    padding: 54px 20px 72px;
  }

  .hero h1 {
    font-size: clamp(3.2rem, 18vw, 5rem);
  }

  .hero-visual {
    justify-self: start;
    width: min(260px, 76vw);
  }

  .hero-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .feature-grid,
  .support-grid,
  .data-band,
  .contact-band {
    grid-template-columns: 1fr;
  }

  .content-band,
  .document-page {
    padding-left: 20px;
    padding-right: 20px;
  }

  .content-band {
    padding-bottom: 76px;
    padding-top: 68px;
  }

  .data-band {
    gap: 30px;
    padding: 68px 20px;
  }

  .document-page {
    padding-bottom: 80px;
    padding-top: 52px;
  }

  .document-header {
    padding-bottom: 40px;
  }

  .document-body section {
    padding: 32px 0;
  }

  .important-section {
    padding-left: 18px !important;
  }

  .contact-band {
    gap: 22px;
    padding: 28px 24px;
  }

  .site-footer {
    grid-template-columns: 1fr;
    padding-left: 20px;
    padding-right: 20px;
  }

  .footer-links {
    flex-direction: column;
    gap: 8px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}