:root {
  --color-primary: #0f2747;
  --color-primary-dark: #0a1a30;
  --color-blue: #2f76ce;
  --color-blue-soft: #eaf2fd;
  --color-accent: #f28c28;
  --color-accent-dark: #dc6f08;
  --color-bg: #ffffff;
  --color-bg-soft: #f7f9fc;
  --color-text: #1f2937;
  --color-text-sub: #64748b;
  --color-border: #e5e7eb;
  --color-success-bg: #eef7f2;
  --color-warning-bg: #fff6eb;
  --color-danger-bg: #fff1f0;
  --shadow-sm: 0 8px 24px rgba(15, 39, 71, 0.06);
  --shadow-md: 0 20px 40px rgba(15, 39, 71, 0.1);
  --radius-sm: 12px;
  --radius-md: 18px;
  --radius-lg: 28px;
  --container: 1180px;
  --transition: 0.25s ease;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic", "Meiryo", sans-serif;
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.8;
  overflow-x: clip;
}

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

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

a:hover {
  text-decoration: none;
}

p,
ul,
ol,
table {
  margin: 0;
}

ul,
ol {
  padding-left: 1.2rem;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  color: var(--color-primary-dark);
  line-height: 1.3;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
}

.skip-link:focus {
  left: 16px;
  top: 16px;
  z-index: 1000;
  background: var(--color-primary);
  color: #fff;
  padding: 10px 14px;
  border-radius: 999px;
}

.container {
  width: min(var(--container), calc(100% - 32px));
  margin-inline: auto;
}

.narrow {
  width: min(980px, calc(100% - 32px));
}

.section {
  padding: 88px 0;
}

.section-tight {
  padding-top: 40px;
  padding-bottom: 72px;
}

.hero {
  padding: 28px 0 72px;
}

.section-alt {
  background: var(--color-bg-soft);
}

.section-heading {
  width: 100%;
  max-width: 1080px;
  margin-bottom: 36px;
  text-align: left;
}

.section-heading.center {
  margin-inline: 0;
  text-align: left;
}

.section-kicker,
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-blue);
  margin-bottom: 14px;
}

.section-heading h2 {
  font-size: clamp(1.95rem, 2vw + 1.3rem, 2.8rem);
  margin-bottom: 14px;
}

.section-heading p,
.lead,
.hero-note,
.cta-note,
.faq-answer p,
.mini-card p,
.content-card p,
.panel p,
.toc-card span,
.flow-grid span,
.section-footnote {
  color: var(--color-text-sub);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(229, 231, 235, 0.9);
}

.header-inner {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 24px;
  min-height: 84px;
}

.site-logo img {
  width: clamp(168px, 18vw, 220px);
  height: auto;
}

.global-nav ul {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 26px;
  list-style: none;
  padding: 0;
}

.global-nav a {
  color: var(--color-primary);
  font-weight: 700;
  font-size: 0.96rem;
}

.header-cta {
  white-space: nowrap;
}

.menu-toggle {
  display: none;
  border: 1px solid var(--color-border);
  background: #fff;
  border-radius: 14px;
  width: 52px;
  height: 52px;
  padding: 0;
  align-items: center;
  justify-content: center;
  gap: 4px;
  cursor: pointer;
}

.menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-primary);
  border-radius: 999px;
}

.breadcrumb-wrap {
  padding-top: 8px;
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  padding: 0;
  color: var(--color-text-sub);
  font-size: 0.92rem;
}

.breadcrumb li + li::before {
  content: ">";
  margin-right: 8px;
  color: #94a3b8;
}

.hero-grid,
.media-split,
.cta-grid,
.overview-grid,
.dual-note-grid,
.two-col-panels {
  display: grid;
  gap: 28px;
}

.hero-grid {
  grid-template-columns: minmax(0, 1fr) minmax(340px, 480px);
  gap: 56px;
  align-items: start;
}

.cta-grid {
  grid-template-columns: minmax(0, 1.12fr) minmax(320px, 420px);
  align-items: center;
}

.media-split,
.media-split-reverse {
  grid-template-columns: minmax(0, 1.12fr) minmax(280px, 0.88fr);
  align-items: start;
}

.media-split-reverse > :first-child {
  order: 1;
}

.media-split-reverse > :last-child {
  order: 2;
}

.align-start {
  align-items: start;
}

.hero-content {
  position: relative;
  padding: 34px 34px 30px;
  background: linear-gradient(180deg, #ffffff 0%, #f8fbff 100%);
  border: 1px solid #d9e6f5;
  border-radius: 28px;
  box-shadow: 0 18px 40px rgba(15, 39, 71, 0.08);
}

.hero-content::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 5px;
  border-radius: 28px 28px 0 0;
  background: linear-gradient(90deg, var(--color-blue), var(--color-accent));
}

.hero .eyebrow {
  padding: 8px 12px;
  border-radius: 999px;
  background: #eef5ff;
  border: 1px solid #d7e6fb;
  margin-bottom: 18px;
}

.hero h1 {
  font-size: clamp(2.35rem, 3.6vw, 4rem);
  letter-spacing: -0.035em;
  line-height: 1.18;
  margin-bottom: 22px;
  color: var(--color-primary-dark);
}

.hero h1::after {
  content: "";
  display: block;
  width: 88px;
  height: 4px;
  border-radius: 999px;
  margin-top: 18px;
  background: linear-gradient(90deg, var(--color-accent), #ffb15b);
}

.lead {
  font-size: 1.04rem;
  line-height: 1.9;
  color: #4b5d73;
}

.hero-points,
.check-list,
.warning-list {
  list-style: none;
  padding: 0;
}

.hero-points {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 28px 0 30px;
}

.hero-points li {
  position: relative;
  min-height: 62px;
  display: flex;
  align-items: center;
  padding: 14px 14px 14px 40px;
  border: 1px solid #dbe7f5;
  border-radius: 16px;
  background: #ffffff;
  color: var(--color-primary);
  font-weight: 700;
  box-shadow: 0 10px 20px rgba(15, 39, 71, 0.04);
}

.check-list li,
.warning-list li {
  position: relative;
  padding-left: 38px;
}

.hero-points li::before,
.check-list li::before {
  content: "✓";
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  width: 20px;
  height: 20px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 0.78rem;
  font-weight: 800;
  color: #fff;
  background: linear-gradient(135deg, var(--color-blue), var(--color-primary));
}

.warning-list li::before {
  content: "!";
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  width: 20px;
  height: 20px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 0.78rem;
  font-weight: 800;
  color: #fff;
  background: linear-gradient(135deg, #ef4444, #dc2626);
}

.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 6px;
  margin-bottom: 0;
}

.hero-note {
  margin-top: 16px;
}

.hero-note,
.cta-note {
  font-size: 0.95rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 54px;
  padding: 0 22px;
  border-radius: 999px;
  font-weight: 800;
  line-height: 1.2;
  border: 1px solid transparent;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition), color var(--transition), border-color var(--transition);
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark));
  box-shadow: 0 14px 30px rgba(242, 140, 40, 0.25);
}

.btn-primary:hover {
  color: #fff;
  box-shadow: 0 18px 34px rgba(242, 140, 40, 0.34);
}

.btn-secondary {
  color: var(--color-primary);
  background: #fff;
  border-color: var(--color-border);
}

.btn-secondary:hover {
  color: var(--color-primary);
  border-color: var(--color-blue);
}

.btn-large {
  min-height: 60px;
  padding-inline: 28px;
}

.media-card {
  width: 100%;
  aspect-ratio: 4 / 5;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  background: #dce8f7;
}

.media-card img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
  object-position: center center;
}

.hero-media {
  align-self: start;
  display: flex;
  justify-content: flex-end;
  margin-top: -6px;
}

.cta-media {
  align-self: center;
}

.sticky-visual {
  align-self: start;
}

.media-card-hero {
  width: min(100%, 480px);
  height: clamp(480px, 64vh, 680px);
  aspect-ratio: 4 / 5;
  margin-left: auto;
}

.media-card-hero img {
  object-position: center 38%;
}

.sticky-visual .media-card,
.cta-media .media-card {
  width: min(100%, 460px);
  height: clamp(420px, 56vh, 620px);
  aspect-ratio: 4 / 5;
  margin-left: auto;
}

.sticky-visual .media-card img,
.cta-media .media-card img {
  object-position: center 36%;
}

.toc-grid,
.cards-grid,
.support-grid {
  display: grid;
  gap: 18px;
}

.toc-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.toc-card,
.content-card,
.mini-card,
.panel {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.toc-card {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  color: var(--color-text);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.toc-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: #c4d6ef;
}

.toc-card strong {
  font-size: 1.08rem;
  color: var(--color-primary-dark);
}

.overview-grid,
.dual-note-grid,
.two-col-panels {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.content-card,
.panel {
  padding: 28px;
}

.content-card h3,
.panel h3,
.mini-card h3 {
  font-size: 1.18rem;
  margin-bottom: 14px;
}

.info-banner {
  border-radius: var(--radius-md);
  padding: 20px 22px;
  border: 1px solid var(--color-border);
  margin-bottom: 26px;
}

.info-banner strong {
  display: inline-block;
  margin-bottom: 8px;
  color: var(--color-primary-dark);
}

.info-banner.warning {
  background: var(--color-warning-bg);
  border-color: #ffd9a8;
}

.info-banner.soft {
  margin-top: 20px;
  background: linear-gradient(180deg, #f7fbff 0%, #edf4ff 100%);
  border-color: #d7e6fb;
}

.info-banner.neutral {
  margin-top: 24px;
  background: #fff;
}

.chip-group {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.chip {
  display: inline-flex;
  align-items: center;
  min-height: 42px;
  padding: 0 16px;
  border-radius: 999px;
  border: 1px solid #d6e4f8;
  background: var(--color-blue-soft);
  color: var(--color-primary);
  font-weight: 700;
  font-size: 0.95rem;
}

.buyer-card-grid,
.comparison-card-grid {
  display: grid;
  gap: 16px;
}

.buyer-card-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.buyer-card {
  padding: 18px;
  border-radius: 16px;
  border: 1px solid #d6e4f8;
  background: linear-gradient(180deg, #f8fbff 0%, #eef5ff 100%);
}

.buyer-card h4 {
  margin: 0 0 8px;
  font-size: 1rem;
  color: var(--color-primary-dark);
}

.buyer-card p {
  margin: 0;
  color: var(--color-text-sub);
  line-height: 1.7;
}

.comparison-mobile {
  display: none;
}

.comparison-card {
  padding: 22px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: #fff;
  box-shadow: var(--shadow-sm);
}

.comparison-card h3 {
  margin-bottom: 14px;
  font-size: 1.12rem;
}

.comparison-card dl {
  margin: 0;
  display: grid;
  gap: 12px;
}

.comparison-card dl div {
  padding-top: 12px;
  border-top: 1px solid #e6edf7;
}

.comparison-card dl div:first-child {
  padding-top: 0;
  border-top: 0;
}

.comparison-card dt {
  font-weight: 800;
  color: var(--color-primary-dark);
  margin-bottom: 4px;
}

.comparison-card dd {
  margin: 0;
  color: var(--color-text-sub);
}

.cards-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.cards-grid-tight {
  gap: 16px;
}

.mini-card {
  padding: 22px;
}

.accent-left {
  position: relative;
  overflow: hidden;
}

.accent-left::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 6px;
  background: linear-gradient(180deg, var(--color-accent), var(--color-accent-dark));
}

.accent-left.accent-blue::before {
  background: linear-gradient(180deg, var(--color-blue), var(--color-primary));
}

.panel-positive {
  background: var(--color-success-bg);
  border-color: #cfe7d7;
}

.panel-caution {
  background: #fff;
  border-color: #ffd4cf;
}

.table-wrap {
  width: 100%;
  overflow-x: auto;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.comparison-table {
  width: 100%;
  min-width: 740px;
  border-collapse: collapse;
  background: #fff;
}

.comparison-table-wide {
  min-width: 1080px;
}

.comparison-table th,
.comparison-table td {
  padding: 18px 16px;
  border: 1px solid var(--color-border);
  vertical-align: top;
  font-size: 0.97rem;
}

.comparison-table thead th {
  background: var(--color-primary);
  color: #fff;
  text-align: left;
}

.comparison-table tbody th {
  width: 170px;
  background: #f8fbff;
  color: var(--color-primary-dark);
  text-align: left;
}

.section-footnote {
  margin-top: 14px;
  font-size: 0.92rem;
}

.flow-grid {
  list-style: none;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
  counter-reset: flow;
}

.flow-grid li {
  position: relative;
  min-height: 180px;
  padding: 68px 20px 24px;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.flow-grid li::before {
  counter-increment: flow;
  content: counter(flow, decimal-leading-zero);
  position: absolute;
  top: 20px;
  left: 20px;
  display: inline-grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-blue), var(--color-primary));
  color: #fff;
  font-weight: 800;
  font-size: 0.85rem;
}

.flow-grid strong {
  display: block;
  font-size: 1.08rem;
  color: var(--color-primary-dark);
  margin-bottom: 10px;
}

.support-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.faq-list {
  display: grid;
  gap: 14px;
}

.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: #fff;
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.faq-item summary {
  list-style: none;
  position: relative;
  padding: 22px 60px 22px 22px;
  font-weight: 800;
  color: var(--color-primary-dark);
  cursor: pointer;
}

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

.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 22px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.5rem;
  line-height: 1;
  color: var(--color-blue);
}

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

.faq-answer {
  padding: 0 22px 22px;
}

.cta-section {
  background: linear-gradient(180deg, #f7fbff 0%, #eef4fb 100%);
}

.cta-grid {
  padding: 34px;
  border: 1px solid #d9e6f5;
  border-radius: 32px;
  background: linear-gradient(180deg, #ffffff 0%, #f7fbff 100%);
  box-shadow: 0 22px 44px rgba(15, 39, 71, 0.08);
}

.cta-content {
  align-self: center;
}

.cta-content .btn {
  margin-top: 24px;
}

.cta-content .cta-note {
  margin-top: 18px;
}

.site-footer {
  background: var(--color-primary-dark);
  color: rgba(255, 255, 255, 0.88);
  padding: 52px 0 78px;
}

.footer-inner {
  display: grid;
  gap: 22px;
}

.footer-brand img {
  width: clamp(180px, 20vw, 220px);
  height: auto;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 18px 22px;
}

.footer-nav a,
.copyright {
  color: rgba(255, 255, 255, 0.82);
}

.floating-cta {
  position: fixed;
  left: 16px;
  right: 16px;
  bottom: 14px;
  z-index: 90;
  display: none;
  min-height: 56px;
  padding: 0 18px;
  border-radius: 999px;
  align-items: center;
  justify-content: center;
  text-align: center;
  font-weight: 800;
  color: #fff;
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark));
  box-shadow: 0 20px 40px rgba(242, 140, 40, 0.34);
}

.sticky-visual {
  position: sticky;
  top: 104px;
}

@media (max-width: 1120px) {
  .global-nav ul {
    gap: 16px;
  }

  .hero-grid {
    grid-template-columns: minmax(0, 1fr) minmax(320px, 420px);
    gap: 40px;
    align-items: start;
  }

  .cta-grid,
  .media-split,
  .media-split-reverse,
  .overview-grid,
  .dual-note-grid,
  .two-col-panels,
  .support-grid,
  .toc-grid,
  .cards-grid,
  .flow-grid,
  .buyer-card-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .media-split,
  .media-split-reverse {
    align-items: start;
  }

  .cta-grid {
    align-items: center;
    padding: 28px;
  }

  .media-card-hero {
    height: clamp(440px, 58vh, 620px);
  }

  .sticky-visual .media-card,
  .cta-media .media-card {
    width: min(100%, 400px);
    height: clamp(400px, 50vh, 560px);
  }
}

@media (max-width: 920px) {
  .header-inner {
    grid-template-columns: auto auto;
  }

  .menu-toggle {
    display: inline-flex;
    justify-self: end;
  }

  .header-cta {
    display: none;
  }

  .global-nav {
    display: none;
    grid-column: 1 / -1;
    border-top: 1px solid var(--color-border);
    padding: 10px 0 18px;
  }

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

  .global-nav ul {
    flex-direction: column;
    align-items: flex-start;
    padding: 10px 0 0;
  }

  .hero {
    padding: 36px 0 56px;
  }

  .hero-content {
    padding: 28px 24px 24px;
  }

  .hero-grid,
  .cta-grid,
  .media-split,
  .media-split-reverse,
  .overview-grid,
  .dual-note-grid,
  .two-col-panels,
  .support-grid,
  .toc-grid,
  .cards-grid,
  .flow-grid,
  .buyer-card-grid,
  .comparison-card-grid {
    grid-template-columns: 1fr;
  }

  .comparison-desktop {
    display: none;
  }

  .comparison-mobile {
    display: grid;
    margin-top: 8px;
  }

  .cta-grid {
    padding: 24px;
  }

  .hero-grid {
    gap: 28px;
  }

  .hero-media,
  .cta-media {
    justify-content: stretch;
  }

  .hero-media {
    margin-top: 0;
  }

  .media-card-hero,
  .sticky-visual .media-card,
  .cta-media .media-card {
    width: 100%;
    max-width: none;
    height: auto;
    aspect-ratio: 4 / 5;
    max-height: 520px;
    margin-left: 0;
  }

  .hero-points {
    grid-template-columns: 1fr;
  }

  .sticky-visual {
    position: static;
  }

  .flow-grid li {
    min-height: auto;
  }
}

@media (max-width: 640px) {
  .section {
    padding: 72px 0;
  }

  .section-tight {
    padding-top: 28px;
    padding-bottom: 56px;
  }

  .hero {
    padding: 28px 0 52px;
  }

  .hero-content {
    padding: 22px 18px 18px;
    border-radius: 22px;
  }

  .hero-content::before {
    border-radius: 22px 22px 0 0;
  }

  .container,
  .narrow {
    width: min(100% - 24px, var(--container));
  }

  .hero h1 {
    font-size: 2rem;
  }

  .section-heading h2 {
    font-size: 1.75rem;
  }

  .content-card,
  .mini-card,
  .panel,
  .toc-card,
  .faq-item summary,
  .faq-answer,
  .info-banner,
  .flow-grid li {
    padding-left: 18px;
    padding-right: 18px;
  }

  .cta-grid {
    padding: 18px;
    border-radius: 24px;
  }

  .cta-content .cta-note {
    margin-top: 16px;
  }

  .faq-answer {
    padding-bottom: 18px;
  }

  .btn,
  .btn-large {
    width: 100%;
  }

  .hero-cta-group {
    flex-direction: column;
  }

  .media-card-hero,
  .sticky-visual .media-card,
  .cta-media .media-card {
    max-height: 480px;
  }

  .comparison-table th,
  .comparison-table td {
    padding: 14px 12px;
  }

  .floating-cta {
    display: inline-flex;
  }

  .site-footer {
    padding-bottom: 116px;
  }
}