:root {
  --bg: #f2f2f2;
  --surface: #ffffff;
  --surface-soft: #ececec;
  --black: #0d0d0d;
  --charcoal: #262626;
  --text-gray: rgba(13, 13, 13, 0.68);
  --line: rgba(13, 13, 13, 0.08);
  --line-strong: rgba(13, 13, 13, 0.16);
  --shadow: 0 20px 50px rgba(13, 13, 13, 0.06);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--black);
  font-family: "Yu Gothic", "Hiragino Sans", "Meiryo", sans-serif;
  line-height: 1.75;
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

.shell {
  width: min(1240px, calc(100vw - 56px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  background: rgba(242, 242, 242, 0.92);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  min-height: 88px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.site-logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.site-logo__mark {
  width: 34px;
  height: 34px;
  flex: 0 0 34px;
}

.site-logo__text {
  font-size: 15px;
  font-weight: 800;
  letter-spacing: 0.16em;
  white-space: nowrap;
}

.header-cta,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 56px;
  padding: 0 26px;
  border-radius: 14px;
  border: 1px solid transparent;
  font-weight: 700;
  transition: transform 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
}

.header-cta,
.button--primary {
  background: var(--black);
  color: var(--bg);
}

.button--secondary {
  background: transparent;
  color: var(--black);
  border-color: var(--line-strong);
}

.button--tertiary {
  background: rgba(255, 255, 255, 0.08);
  color: var(--bg);
  border-color: rgba(255, 255, 255, 0.18);
}

.header-cta:hover,
.button:hover {
  transform: translateY(-1px);
}

.hero-section {
  position: relative;
  overflow: hidden;
  min-height: calc(100vh - 88px);
  display: flex;
  align-items: center;
  padding: 96px 0 104px;
}

.hero-ring {
  position: absolute;
  left: -140px;
  top: 20px;
  width: 760px;
  height: 760px;
  opacity: 0.08;
  pointer-events: none;
  animation: spin 28s linear infinite;
}

.hero-ring svg {
  width: 100%;
  height: 100%;
}

.hero-ring text {
  fill: var(--black);
  font-size: 84px;
  font-weight: 700;
  letter-spacing: 0.28em;
}

.hero-inner {
  position: relative;
  z-index: 1;
  text-align: center;
}

.eyebrow,
.section-label {
  margin: 0 0 18px;
  color: rgba(13, 13, 13, 0.52);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.section-label--light { color: rgba(242, 242, 242, 0.76); }

.hero-section h1,
.section h2 {
  margin: 0;
  letter-spacing: -0.05em;
  line-height: 1.08;
}

.hero-section h1 {
  font-size: clamp(56px, 8vw, 106px);
}

.hero-lead {
  margin: 28px auto 0;
  max-width: 860px;
  font-size: clamp(22px, 2.5vw, 34px);
  font-weight: 700;
}

.hero-copy {
  max-width: 760px;
  margin: 24px auto 0;
  color: var(--text-gray);
  font-size: 18px;
}

.hero-actions {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 34px;
}

.section {
  padding: 100px 0;
}

.section h2 {
  font-size: clamp(38px, 5vw, 64px);
}

.problems-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 34px;
}

.problem-card,
.theme-card,
.faq-item {
  padding: 24px;
  border-radius: 20px;
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.problem-card span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 999px;
  background: var(--surface-soft);
  color: var(--text-gray);
  font-weight: 800;
  margin-bottom: 18px;
}

.problem-card p { margin: 0; font-size: 17px; }

.services-section,
.cta-section {
  background: var(--charcoal);
  color: var(--bg);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 26px;
  margin-top: 34px;
}

.service-card {
  min-height: 100%;
  padding: 28px;
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.service-card__eyebrow {
  margin: 0 0 16px;
  color: rgba(242, 242, 242, 0.68);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.12em;
}

.service-card h3 {
  margin: 0;
  font-size: 38px;
  line-height: 1.12;
  letter-spacing: -0.05em;
}

.service-card p {
  margin: 18px 0 0;
  color: rgba(242, 242, 242, 0.78);
}

.service-card ul,
.check-list {
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.service-card li::before,
.check-list li::before {
  content: "—";
  margin-right: 10px;
  color: rgba(242, 242, 242, 0.5);
}

.philosophy-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 48px;
  align-items: start;
}

.philosophy-body p { margin: 0; }
.philosophy-body p + p { margin-top: 16px; }

.check-list {
  margin: 20px 0;
}

.check-list li::before {
  color: rgba(13, 13, 13, 0.42);
}

.flow-list {
  display: grid;
  gap: 18px;
  margin-top: 34px;
}

.flow-item {
  display: grid;
  grid-template-columns: 84px 1fr;
  gap: 22px;
  padding: 24px 28px;
  border-bottom: 1px solid var(--line);
}

.flow-item__number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  border-radius: 18px;
  background: var(--surface);
  box-shadow: var(--shadow);
  font-size: 22px;
  font-weight: 800;
}

.flow-item h3,
.theme-card h3,
.faq-item h3 {
  margin: 0;
  font-size: 26px;
  line-height: 1.35;
}

.flow-item p,
.theme-card p,
.faq-item p,
.themes-note,
.cta-copy,
.cta-points p {
  margin: 12px 0 0;
  color: var(--text-gray);
}

.themes-grid,
.faq-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 34px;
}

.themes-note {
  margin-top: 22px;
}

.cta-box {
  padding: 64px;
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.cta-points {
  max-width: 760px;
  margin: 24px auto 0;
}

.hero-actions--center {
  margin-top: 30px;
}

.check-list--light li::before {
  color: rgba(242, 242, 242, 0.52);
}

.check-list--light li,
.cta-section .cta-copy,
.cta-section .cta-points p {
  color: rgba(242, 242, 242, 0.78);
}

.site-footer {
  padding: 32px 0 38px;
  border-top: 1px solid var(--line);
}

.footer-inner {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
}

.footer-brand,
.footer-copy,
.footer-meta {
  margin: 0;
}

.footer-brand {
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.16em;
}

.footer-copy,
.footer-meta {
  margin-top: 8px;
  color: var(--text-gray);
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@media (max-width: 980px) {
  .problems-grid,
  .services-grid,
  .themes-grid,
  .faq-list,
  .philosophy-grid {
    grid-template-columns: 1fr;
  }

  .service-card h3 {
    font-size: 32px;
  }
}

@media (max-width: 800px) {
  .shell {
    width: calc(100vw - 28px);
  }

  .header-inner {
    min-height: 76px;
    gap: 12px;
  }

  .site-logo {
    display: grid;
    grid-template-columns: 24px minmax(0, 1fr);
    column-gap: 8px;
    align-items: center;
  }

  .site-logo__mark {
    width: 24px;
    height: 24px;
    flex: 0 0 24px;
  }

  .site-logo__text {
    font-size: 12px;
    line-height: 1.15;
    white-space: normal;
    letter-spacing: 0.08em;
  }

  .header-cta,
  .button {
    min-height: 48px;
    padding: 0 18px;
    border-radius: 12px;
    font-size: 14px;
  }

  .hero-section {
    min-height: auto;
    padding: 122px 0 112px;
  }

  .hero-ring {
    width: 560px;
    height: 560px;
    left: -180px;
    top: 28px;
  }

  .hero-ring text {
    font-size: 62px;
  }

  .hero-inner {
    text-align: left;
  }

  .hero-lead,
  .hero-copy {
    margin-left: 0;
  }

  .hero-copy {
    font-size: 16px;
  }

  .hero-actions {
    justify-content: flex-start;
  }

  .section {
    padding: 72px 0;
  }

  .flow-item {
    grid-template-columns: 1fr;
    gap: 16px;
    padding: 20px 0;
  }

  .cta-box {
    padding: 36px 22px;
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}
.faq-accordion {
  margin-top: 34px;
  border-top: 1px solid var(--line-strong);
}

.faq-item--accordion {
  padding: 0;
  border: 0;
  border-bottom: 1px solid var(--line-strong);
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}

.faq-item--accordion summary {
  position: relative;
  list-style: none;
  cursor: pointer;
  padding: 28px 52px 28px 0;
  font-size: 28px;
  font-weight: 700;
  line-height: 1.4;
}

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

.faq-item--accordion summary::after {
  content: "+";
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  color: rgba(13, 13, 13, 0.56);
  font-size: 34px;
  font-weight: 300;
}

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

.faq-item--accordion p {
  margin: 0 0 26px;
  max-width: 860px;
  color: var(--text-gray);
  font-size: 17px;
}

@media (max-width: 800px) {
  .faq-item--accordion summary {
    padding: 22px 44px 22px 0;
    font-size: 22px;
  }

  .faq-item--accordion summary::after {
    font-size: 28px;
  }
}
.flow-minimal--light {
  border-top: 1px solid var(--line-strong);
  margin-top: 34px;
}

.flow-minimal--light article {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 14px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line-strong);
}

.flow-minimal--light span {
  color: rgba(13, 13, 13, 0.42);
  font-weight: 800;
  letter-spacing: 0.08em;
}

.flow-minimal--light h3 {
  margin: 0;
  font-size: 24px;
  line-height: 1.35;
}

.flow-minimal--light p {
  margin: 10px 0 0;
  color: var(--text-gray);
}

.faq-item--accordion summary {
  font-size: 22px;
  font-weight: 500;
  line-height: 1.5;
}

.faq-item--accordion summary::after {
  font-size: 28px;
  font-weight: 200;
}

@media (max-width: 800px) {
  .flow-minimal--light article {
    grid-template-columns: 58px 1fr;
    gap: 12px;
    padding: 18px 0;
  }

  .flow-minimal--light h3 {
    font-size: 20px;
  }

  .faq-item--accordion summary {
    font-size: 18px;
    font-weight: 500;
  }

  .faq-item--accordion summary::after {
    font-size: 24px;
  }
}

.cta-section {
  padding-bottom: 64px;
}

.site-footer {
  background: var(--black);
  border-top: 0;
  padding: 34px 0 40px;
}

.footer-brand {
  color: var(--bg);
}

.footer-copy,
.footer-meta {
  color: rgba(242, 242, 242, 0.68);
}

@media (max-width: 800px) {
  .cta-section {
    padding-bottom: 48px;
  }
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
}

.menu-toggle {
  width: 34px;
  height: 34px;
  border: 0;
  border-radius: 0;
  background: transparent;
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  padding: 0;
  appearance: none;
  box-shadow: none;
}

.menu-toggle span {
  width: 22px;
  height: 2px;
  border-radius: 999px;
  background: var(--black);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.menu-toggle.is-open span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.menu-toggle.is-open span:nth-child(2) {
  opacity: 0;
}

.menu-toggle.is-open span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

.menu-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(13, 13, 13, 0.08);
}

.lp-menu {
  position: absolute;
  right: max(32px, calc((100vw - min(1240px, calc(100vw - 56px))) / 2));
  top: calc(100% + 12px);
  width: min(320px, calc(100vw - 32px));
  padding: 18px;
  border: 1px solid rgba(13, 13, 13, 0.08);
  border-radius: 18px;
  background: rgba(232, 232, 232, 0.78);
  backdrop-filter: blur(18px);
  box-shadow: 0 18px 48px rgba(13, 13, 13, 0.08);
  display: grid;
  gap: 4px;
  opacity: 0;
  pointer-events: none;
  transform: translateY(-8px);
  transition: opacity 0.18s ease, transform 0.18s ease;
  z-index: 40;
}

.lp-menu.is-open {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.lp-menu a {
  padding: 12px 14px;
  border-radius: 12px;
  font-weight: 700;
}

.lp-menu a:hover {
  background: rgba(13, 13, 13, 0.05);
}

@media (max-width: 800px) {
  .header-inner {
    min-height: 76px;
    gap: 10px;
  }

  .site-logo {
    display: grid;
    grid-template-columns: 24px minmax(0, 1fr);
    column-gap: 8px;
    align-items: center;
    flex: 1 1 auto;
    min-width: 0;
  }

  .site-logo__mark {
    width: 24px;
    height: 24px;
    flex: 0 0 24px;
  }

  .site-logo__text {
    font-size: 12px;
    line-height: 1.15;
    white-space: normal;
    letter-spacing: 0.08em;
  }

  .header-actions {
    gap: 8px;
  }

  .header-cta {
    min-height: 46px;
    padding: 0 18px;
    font-size: 13px;
  }

  .menu-toggle {
    width: 30px;
    height: 30px;
    flex: 0 0 30px;
  }

  .menu-toggle span {
    width: 18px;
  }

  .lp-menu {
    right: 14px;
    width: min(320px, calc(100vw - 28px));
  }
}

.hero-inner {
  text-align: center;
}

.hero-copy {
  text-align: center;
}

.hero-actions {
  justify-content: center;
}

@media (max-width: 800px) {
  .hero-inner {
    text-align: center;
  }

  .hero-lead,
  .hero-copy {
    margin-left: auto;
    margin-right: auto;
    text-align: center;
  }

  .hero-actions {
    justify-content: center;
  }
}