@import url("https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@400;500;600;700&display=swap");

:root {
  --color-primary: #4d8fa3;
  --color-primary-dark: #317286;
  --color-primary-soft: #eaf5f7;
  --color-text: #243438;
  --color-muted: #647479;
  --color-border: #dce7e9;
  --color-surface: #f7fafb;
  --color-white: #ffffff;
  --shadow-soft: 0 18px 44px rgba(44, 86, 98, 0.09);
  --radius-large: 24px;
  --radius-medium: 16px;
  --radius-small: 10px;
  --container-width: 1120px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--color-text);
  background: var(--color-white);
  font-family: "Noto Sans JP", sans-serif;
  font-size: 16px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

body.nav-open {
  overflow: hidden;
}

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

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

button,
input,
textarea {
  font: inherit;
}

button {
  color: inherit;
}

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

.narrow-container {
  width: min(calc(100% - 40px), 820px);
  margin-inline: auto;
}

.section {
  padding-block: 80px;
}

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

.section-heading {
  max-width: 700px;
  margin-bottom: 38px;
}

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

.eyebrow {
  display: block;
  margin-bottom: 10px;
  color: var(--color-primary-dark);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

h1,
h2,
h3,
h4,
p {
  margin-top: 0;
}

h1,
h2,
h3,
h4 {
  color: var(--color-text);
  line-height: 1.45;
}

h1 {
  margin-bottom: 22px;
  font-size: clamp(2rem, 8vw, 3.5rem);
  letter-spacing: 0.02em;
}

h2 {
  margin-bottom: 14px;
  font-size: clamp(1.6rem, 5vw, 2.2rem);
  letter-spacing: 0.03em;
}

h3 {
  margin-bottom: 10px;
  font-size: 1.1rem;
}

h4 {
  margin-bottom: 8px;
  font-size: 1rem;
}

p {
  margin-bottom: 1.4em;
  color: var(--color-muted);
}

ul,
ol {
  color: var(--color-muted);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 12px 24px;
  border: 1px solid var(--color-primary-dark);
  border-radius: 999px;
  background: var(--color-primary-dark);
  color: var(--color-white);
  font-weight: 700;
  text-align: center;
  transition: background-color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.button:hover {
  border-color: #286579;
  background: #286579;
  transform: translateY(-1px);
}

.button--secondary {
  background: var(--color-white);
  color: var(--color-primary-dark);
}

.button--secondary:hover {
  background: var(--color-primary-soft);
}

.button--light {
  border-color: var(--color-white);
  background: var(--color-white);
  color: var(--color-primary-dark);
}

.button--light:hover {
  border-color: var(--color-primary-soft);
  background: var(--color-primary-soft);
}

.text-link {
  color: var(--color-primary-dark);
  font-weight: 700;
}

.text-link:hover {
  text-decoration: underline;
  text-underline-offset: 4px;
}

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 100;
  padding: 8px 14px;
  border-radius: 6px;
  background: var(--color-text);
  color: var(--color-white);
  transform: translateY(-150%);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(220, 231, 233, 0.8);
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(12px);
}

.nav-open .site-header {
  background: var(--color-white);
}

.header-inner {
  display: flex;
  min-height: 68px;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.site-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 1.02rem;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.site-logo__mark {
  position: relative;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--color-primary-soft);
}

.site-logo__mark::before,
.site-logo__mark::after {
  position: absolute;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--color-primary);
  content: "";
}

.site-logo__mark::before {
  top: 7px;
  left: 7px;
}

.site-logo__mark::after {
  right: 7px;
  bottom: 7px;
}

.menu-button {
  width: 44px;
  height: 44px;
  padding: 10px;
  border: 0;
  background: transparent;
  cursor: pointer;
}

.menu-button span {
  display: block;
  width: 22px;
  height: 2px;
  margin: 5px auto;
  background: currentColor;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav-open .menu-button span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

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

.nav-open .menu-button span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.global-nav {
  position: absolute;
  top: 100%;
  right: 0;
  left: 0;
  z-index: 30;
  display: none;
  height: calc(100vh - 69px);
  overflow-y: auto;
  padding: 28px 20px;
  background: var(--color-white);
}

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

.nav-open main,
.nav-open .site-footer {
  visibility: hidden;
}

.global-nav ul,
.footer-nav {
  margin: 0;
  padding: 0;
  list-style: none;
}

.global-nav ul {
  display: grid;
  gap: 4px;
}

.global-nav a {
  display: block;
  padding: 12px 8px;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.94rem;
  font-weight: 600;
}

.global-nav .nav-cta {
  margin-top: 14px;
  border: 0;
  border-radius: 999px;
  background: var(--color-primary-dark);
  color: var(--color-white);
  text-align: center;
}

.hero {
  position: relative;
  overflow: hidden;
  padding-block: 72px 64px;
  background: linear-gradient(145deg, #fff 30%, var(--color-primary-soft) 100%);
}

.hero::after {
  position: absolute;
  right: -90px;
  bottom: -160px;
  width: 340px;
  height: 340px;
  border: 70px solid rgba(255, 255, 255, 0.48);
  border-radius: 50%;
  content: "";
}

.hero__inner {
  position: relative;
  z-index: 1;
}

.hero__content {
  max-width: 700px;
}

.hero__lead {
  max-width: 620px;
  margin-bottom: 28px;
  font-size: 1rem;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.hero__note {
  margin: 15px 0 0;
  color: var(--color-muted);
  font-size: 0.78rem;
}

.hero__aside {
  position: relative;
  max-width: 560px;
  margin-top: 48px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.9);
  border-radius: var(--radius-large);
  background: rgba(255, 255, 255, 0.78);
  box-shadow: var(--shadow-soft);
}

.hero__aside-body {
  padding: 22px 24px 24px;
}

.hero__aside p:last-child {
  margin-bottom: 0;
}

.hero__aside-image {
  width: 100%;
  height: auto;
  aspect-ratio: 1464 / 1074;
  object-fit: cover;
}

.page-hero {
  padding-block: 64px;
  background: linear-gradient(145deg, var(--color-white), var(--color-primary-soft));
}

.page-hero h1 {
  margin-bottom: 12px;
  font-size: clamp(2rem, 7vw, 3rem);
}

.page-hero p {
  max-width: 680px;
  margin-bottom: 0;
}

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

.card {
  padding: 28px 24px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-medium);
  background: var(--color-white);
}

.card p:last-child {
  margin-bottom: 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.stat-card {
  padding: 26px 12px;
  border-radius: var(--radius-medium);
  background: var(--color-primary-soft);
  text-align: center;
}

.stat-card strong {
  display: block;
  color: var(--color-primary-dark);
  font-size: clamp(1.35rem, 6vw, 2.2rem);
  line-height: 1.35;
}

.stat-card strong span {
  font-size: 0.62em;
}

.stat-card > span {
  display: block;
  margin-top: 4px;
  color: var(--color-muted);
  font-size: 0.76rem;
}

.card__number {
  display: grid;
  width: 42px;
  height: 42px;
  margin-bottom: 22px;
  place-items: center;
  border-radius: 50%;
  background: var(--color-primary-soft);
  color: var(--color-primary-dark);
  font-size: 0.84rem;
  font-weight: 700;
}

.flow-grid {
  display: grid;
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.flow-card {
  position: relative;
  padding: 24px 22px 24px 72px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-medium);
  background: var(--color-white);
}

.flow-card__number {
  position: absolute;
  top: 22px;
  left: 20px;
  display: grid;
  width: 36px;
  height: 36px;
  place-items: center;
  border-radius: 50%;
  background: var(--color-primary-soft);
  color: var(--color-primary-dark);
  font-size: 0.78rem;
  font-weight: 700;
}

.flow-card p {
  margin: 0;
}

.faq-list {
  border-top: 1px solid var(--color-border);
}

.faq-item {
  border-bottom: 1px solid var(--color-border);
}

.faq-item summary {
  position: relative;
  padding: 20px 42px 20px 0;
  color: var(--color-text);
  font-weight: 700;
  cursor: pointer;
  list-style: none;
}

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

.faq-item summary::after {
  position: absolute;
  top: 50%;
  right: 4px;
  color: var(--color-primary-dark);
  font-size: 1.3rem;
  content: "+";
  transform: translateY(-50%);
}

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

.faq-item p {
  padding: 0 0 22px;
  margin: 0;
}

.split-layout {
  display: grid;
  gap: 32px;
  align-items: center;
}

.mascot-introduction {
  display: grid;
  gap: 32px;
  align-items: center;
}

.mascot-figure {
  overflow: hidden;
  margin: 0;
  border-radius: var(--radius-large);
  background: var(--color-primary-soft);
  box-shadow: var(--shadow-soft);
}

.mascot-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 1464 / 1074;
  object-fit: cover;
}

.mask-icon {
  position: relative;
  display: grid;
  width: 76px;
  height: 52px;
  margin-bottom: 24px;
  place-items: center;
  border: 3px solid var(--color-white);
  border-radius: 50% 50% 45% 45%;
  background: var(--color-text);
  box-shadow: 0 8px 18px rgba(36, 52, 56, 0.15);
}

.mask-icon::before,
.mask-icon::after {
  position: absolute;
  width: 15px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-white);
  content: "";
}

.mask-icon::before {
  transform: translateX(-16px) rotate(8deg);
}

.mask-icon::after {
  transform: translateX(16px) rotate(-8deg);
}

.message-box,
.notice-box {
  padding: 26px 24px;
  border-left: 4px solid var(--color-primary);
  border-radius: 0 var(--radius-medium) var(--radius-medium) 0;
  background: var(--color-surface);
}

.message-box p:last-child,
.notice-box p:last-child {
  margin-bottom: 0;
}

.monthly-benefit-notes {
  margin-top: 28px;
}

.monthly-benefit-notes ul {
  margin-block: 0;
  padding-left: 1.3em;
}

.details-list {
  margin: 0;
  border-top: 1px solid var(--color-border);
}

.details-list__row {
  display: grid;
  gap: 8px;
  padding-block: 20px;
  border-bottom: 1px solid var(--color-border);
}

.details-list dt {
  font-weight: 700;
}

.details-list dd {
  margin: 0;
  color: var(--color-muted);
  overflow-wrap: anywhere;
}

.policy-content {
  padding-block: 64px 80px;
}

.policy-content section + section {
  margin-top: 42px;
  padding-top: 42px;
  border-top: 1px solid var(--color-border);
}

.policy-content h2 {
  font-size: 1.35rem;
}

.policy-content li + li {
  margin-top: 8px;
}

.policy-meta {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
  color: var(--color-muted);
  font-size: 0.88rem;
}

.contact-box {
  padding: 30px 24px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-large);
  background: var(--color-white);
  text-align: center;
  box-shadow: var(--shadow-soft);
}

.contact-box__email {
  display: block;
  margin-block: 18px;
  color: var(--color-primary-dark);
  font-size: clamp(1rem, 5vw, 1.35rem);
  font-weight: 700;
  overflow-wrap: anywhere;
}

.register-header-link {
  font-size: 0.86rem;
}

.register-hero {
  padding-block: 64px;
  background: linear-gradient(145deg, var(--color-white), var(--color-primary-soft));
  text-align: center;
}

.register-hero__inner > p {
  max-width: 650px;
  margin-inline: auto;
}

.register-highlights {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.register-highlights li {
  padding: 7px 14px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.8);
  color: var(--color-primary-dark);
  font-size: 0.78rem;
  font-weight: 700;
}

.register-layout {
  display: grid;
  gap: 36px;
  align-items: start;
}

.register-form-panel {
  min-width: 0;
}

.register-system-notice {
  margin-bottom: 28px;
}

.registration-form {
  display: grid;
  gap: 26px;
}

.form-field label,
.form-consent legend {
  display: block;
  margin-bottom: 8px;
  color: var(--color-text);
  font-weight: 700;
}

.required-mark {
  display: inline-block;
  padding: 1px 6px;
  border-radius: 4px;
  background: var(--color-primary-soft);
  color: var(--color-primary-dark);
  font-size: 0.7rem;
  font-weight: 700;
  vertical-align: middle;
}

.form-field input {
  width: 100%;
  min-height: 52px;
  padding: 12px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-small);
  background: var(--color-white);
  color: var(--color-text);
}

.form-field input:focus,
.checkbox-label input:focus-visible {
  outline: 3px solid rgba(77, 143, 163, 0.22);
  outline-offset: 2px;
}

.form-field input[aria-invalid="true"] {
  border-color: #b84b4b;
}

.form-help,
.form-error {
  margin: 7px 0 0;
  font-size: 0.78rem;
}

.form-error {
  color: #a23e3e;
  font-weight: 600;
}

.form-consent {
  padding: 0;
  border: 0;
}

.checkbox-label {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  color: var(--color-muted);
}

.checkbox-label input {
  width: 20px;
  height: 20px;
  margin-top: 4px;
  accent-color: var(--color-primary-dark);
  flex: 0 0 auto;
}

.registration-submit {
  width: 100%;
}

.form-submit-note {
  margin: -12px 0 0;
  font-size: 0.78rem;
  text-align: center;
}

.registration-confirmation {
  scroll-margin-top: 100px;
}

.registration-confirmation[hidden],
.registration-form[hidden],
.registration-success[hidden] {
  display: none;
}

.registration-success {
  scroll-margin-top: 100px;
}

.confirmation-actions {
  display: grid;
  gap: 12px;
  margin-top: 28px;
}

.registration-api-error {
  margin-top: 22px;
  padding: 12px 14px;
  border: 1px solid #e7baba;
  border-radius: var(--radius-small);
  background: #fff6f6;
}

.honeypot-field {
  display: none !important;
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
}

.register-side-panel {
  overflow: hidden;
  border-radius: var(--radius-large);
  background: var(--color-primary-soft);
  box-shadow: var(--shadow-soft);
}

.register-side-panel img {
  width: 100%;
  height: auto;
  aspect-ratio: 1464 / 1074;
  object-fit: cover;
}

.register-side-panel__body {
  padding: 24px;
}

.register-side-panel__body h2 {
  font-size: 1.15rem;
}

.register-side-panel__body ul {
  margin-bottom: 0;
  padding-left: 1.3em;
}

.register-side-panel__body li + li {
  margin-top: 8px;
}

.cta-band {
  padding-block: 64px;
  background: var(--color-primary-dark);
  color: var(--color-white);
}

.cta-band__inner {
  display: grid;
  gap: 28px;
  align-items: center;
}

.cta-band h2 {
  margin-bottom: 8px;
  color: var(--color-white);
}

.cta-band p {
  margin-bottom: 0;
  color: rgba(255, 255, 255, 0.82);
}

.site-footer {
  padding-block: 48px 26px;
  background: #203237;
  color: var(--color-white);
}

.footer-top {
  display: grid;
  gap: 30px;
  padding-bottom: 34px;
}

.footer-brand p {
  max-width: 430px;
  margin: 12px 0 0;
  color: rgba(255, 255, 255, 0.65);
  font-size: 0.82rem;
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px 18px;
}

.footer-nav a {
  color: rgba(255, 255, 255, 0.78);
  font-size: 0.78rem;
}

.footer-nav a:hover {
  color: var(--color-white);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.footer-bottom {
  padding-top: 22px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  color: rgba(255, 255, 255, 0.55);
  font-size: 0.72rem;
}

@media (min-width: 720px) {
  .section {
    padding-block: 104px;
  }

  .card-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .stats-grid {
    grid-template-columns: repeat(3, 1fr);
  }

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

  .split-layout {
    grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
  }

  .mascot-introduction {
    grid-template-columns: minmax(0, 1.35fr) minmax(280px, 0.65fr);
    gap: 48px;
  }

  .details-list__row {
    grid-template-columns: 210px 1fr;
    gap: 24px;
  }

  .cta-band__inner {
    grid-template-columns: 1fr auto;
  }

  .footer-top {
    grid-template-columns: 1fr 1fr;
  }

  .footer-nav {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .register-layout {
    grid-template-columns: minmax(0, 1.15fr) minmax(300px, 0.85fr);
    gap: 48px;
  }
}

@media (min-width: 960px) {
  .nav-open main,
  .nav-open .site-footer {
    visibility: visible;
  }

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

  .menu-button {
    display: none;
  }

  .global-nav {
    position: static;
    display: block;
    height: auto;
    padding: 0;
    background: transparent;
  }

  .global-nav ul {
    display: flex;
    align-items: center;
    gap: 24px;
  }

  .global-nav a {
    padding: 8px 0;
    border: 0;
    font-size: 0.82rem;
  }

  .global-nav .nav-cta {
    margin: 0 0 0 4px;
    padding: 9px 18px;
  }

  .hero {
    padding-block: 110px 100px;
  }

  .hero__inner {
    display: grid;
    grid-template-columns: minmax(0, 0.9fr) minmax(440px, 1.1fr);
    gap: 56px;
    align-items: center;
  }

  .hero__aside {
    margin-top: 0;
  }

  .card-grid--four {
    grid-template-columns: repeat(4, 1fr);
  }

  .stats-grid {
    grid-template-columns: repeat(5, 1fr);
  }

  .flow-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}