:root {
  --color-ink: #142a31;
  --color-muted: #66777b;
  --color-green: #0c7867;
  --color-green-dark: #075b52;
  --color-green-light: #e9f8f6;
  --color-aqua: #42c8be;
  --color-border: #e4eeee;
  --color-white: #ffffff;
  --shadow-card: 0 18px 42px rgba(18, 93, 87, .06);
  --font-sans: "Hiragino Kaku Gothic ProN", "Yu Gothic", "YuGothic", "Noto Sans JP", Meiryo, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--color-ink);
  background: var(--color-white);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.8;
  letter-spacing: 0;
}

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

.pc-only {
  display: inline;
}

.sp-only {
  display: none;
}

.container {
  width: min(100% - 80px, 1040px);
  margin-inline: auto;
}

.container--narrow {
  width: min(100% - 80px, 760px);
}

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

.u-nowrap {
  white-space: nowrap;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  height: 72px;
  background: rgba(255, 255, 255, .94);
  border-bottom: 1px solid rgba(229, 240, 238, .8);
  backdrop-filter: blur(18px);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(100% - 72px, 1200px);
  height: 100%;
  margin-inline: auto;
  gap: 32px;
}

.site-logo {
  display: inline-flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0;
  min-width: 260px;
  color: var(--color-green);
  font-weight: 700;
  line-height: 1.18;
}

.site-logo__mark {
  display: block;
  width: auto;
  height: auto;
  color: var(--color-green);
  border: 0;
  border-radius: 0;
  font-size: 25px;
  font-weight: 800;
  letter-spacing: .02em;
}

.site-logo__text {
  font-size: 20px;
  font-weight: 800;
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 28px;
  color: #24393e;
  font-size: 13px;
  font-weight: 700;
  white-space: nowrap;
}

.site-nav a {
  transition: color .2s ease, background-color .2s ease;
}

.site-nav a:hover {
  color: var(--color-green);
}

.site-nav__button {
  display: none;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 28px;
  color: var(--color-white);
  background: var(--color-green);
  border-radius: 6px;
}

.site-nav__button:hover {
  color: var(--color-white) !important;
  background: var(--color-green-dark);
}

.hero {
  position: relative;
  overflow: hidden;
  color: var(--color-white);
  background:
    linear-gradient(90deg, rgba(10, 112, 104, .22), rgba(10, 112, 104, .08)),
    url("../images/Kv_bg_pc.jpg") center / cover no-repeat,
    /* url("../images/Kv_bg_pc_v2.png") center / cover no-repeat, */
    #208f8a;
}

.hero__inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: min(100%, 1440px);
  min-height: clamp(460px, 40.28vw, 580px);
  margin-inline: auto;
  padding: clamp(48px, 5vw, 72px) max(72px, calc((100vw - 1200px) / 2));
  text-align: center;
}

.hero__content {
  position: relative;
  z-index: 2;
  width: min(100%, 760px);
}

.hero__lead {
  margin: 0 0 14px;
  font-size: 14px;
  font-weight: 700;
  line-height: 1.5;
}

.hero h1 {
  margin: 0;
  font-size: clamp(44px, 4.8vw, 68px);
  line-height: 1.13;
  font-weight: 800;
}

.hero__copy {
  width: min(100%, 510px);
  margin: 20px auto 22px;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.9;
}

.period-card {
  display: inline-flex;
  flex-direction: column;
  align-items: stretch;
  min-width: 480px;
  margin-inline: auto;
  padding: 0;
  color: var(--color-ink);
  background: transparent;
  border-radius: 4px;
  box-shadow: 0 14px 34px rgba(9, 84, 76, .18);
  overflow: hidden;
}

.period-card__banner {
  margin: 0;
  min-height: 38px;
  padding: 7px 22px 8px;
  color: var(--color-white);
  background: var(--color-green);
  font-size: 18px;
  font-weight: 800;
  line-height: 1.35;
  text-align: center;
}

.period-card__body {
  display: flex;
  align-items: center;
  gap: 20px;
  min-height: 66px;
  padding: 12px 22px;
  background: var(--color-white);
}

.period-card__body > span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 88px;
  min-width: 88px;
  height: 34px;
  padding: 0 8px;
  color: var(--color-green);
  background: transparent;
  border: 2px solid var(--color-green);
  border-radius: 6px;
  font-size: 14px;
  font-weight: 800;
  line-height: 1.15;
}

.period-card__body > span br {
  display: none;
}

.period-card__date-text {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.period-card__date-sp {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 0;
  color: var(--color-green-dark);
  font-family: Arial, Helvetica, sans-serif;
  font-weight: 800;
  line-height: 1;
  white-space: nowrap;
}

.period-card__year {
  margin-right: 2px;
  font-size: 21px;
}

.period-card__month {
  display: inline-flex;
  align-items: baseline;
}

.period-card__month-number,
.period-card__day-number {
  font-size: 40px;
  line-height: 1;
}

.period-card__month-unit,
.period-card__day-unit {
  font-size: 25px;
  line-height: 1;
}

.period-card__day {
  display: inline-flex;
  align-items: baseline;
  letter-spacing: 0;
}

.period-card__weekday {
  align-self: center;
  display: inline-grid;
  place-items: center;
  width: 28px;
  height: 28px;
  margin-left: 3px;
  color: var(--color-white);
  background: var(--color-green);
  border-radius: 50%;
  font-size: 14px;
  line-height: 1;
}

.period-card__arrow {
  align-self: center;
  width: 24px;
  height: 12px;
  margin: 0 6px;
  object-fit: contain;
}

.section {
  padding: 92px 0;
}

.section--tint {
  background: var(--color-green-light);
}

.section-label {
  margin: 0 0 9px;
  color: var(--color-green);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: .08em;
  line-height: 1.2;
}

.section-label--left {
  margin-bottom: 13px;
}

.section-heading {
  margin-bottom: 42px;
  text-align: center;
}

.section-heading h2,
.application-block h2,
.ideas h2,
.faq h2 {
  position: relative;
  display: inline-block;
  margin: 0;
  font-size: 30px;
  line-height: 1.45;
  font-weight: 800;
}

.section-heading h2::after,
.application-block h2::after,
.ideas h2::after,
.faq h2::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -12px;
  width: 52px;
  height: 3px;
  background: var(--color-green);
  border-radius: 999px;
  transform: translateX(-50%);
}

.application-block {
  padding: 68px 0 72px;
}

.primary-button {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 11px;
  width: fit-content;
  min-width: 220px;
  min-height: 48px;
  margin: 38px auto 0;
  padding: 0 24px;
  color: var(--color-white);
  background: var(--color-green);
  border-radius: 6px;
  font-size: 14px;
  font-weight: 800;
  transition: background-color .2s ease, transform .2s ease;
}

.primary-button:hover {
  background: var(--color-green-dark);
  transform: translateY(-1px);
}

.primary-button span {
  font-size: 18px;
  line-height: 1;
}

.document-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin: 38px 0 0;
  padding: 0;
  list-style: none;
  text-align: center;
}

.document-list a {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 76px;
  height: 100%;
  padding: 14px 34px 14px 16px;
  color: var(--color-green-dark);
  background: var(--color-white);
  border: 1px solid #cfe4e1;
  border-radius: 7px;
  font-size: 14px;
  font-weight: 800;
  line-height: 1.45;
  box-shadow: 0 10px 24px rgba(18, 93, 87, .04);
  transition: border-color .2s ease, color .2s ease, transform .2s ease;
}

.document-list a::after {
  content: "";
  position: absolute;
  top: 50%;
  right: 13px;
  width: 18px;
  height: 18px;
  background: url("../images/download-icon.svg") center / contain no-repeat;
  transform: translateY(-50%);
}

.document-list a:hover {
  color: var(--color-green);
  border-color: rgba(12, 120, 103, .42);
  transform: translateY(-1px);
}

.document-archive {
  width: min(100%, 420px);
  margin: 34px auto 0;
  text-align: center;
}

.document-archive p {
  margin: 0 0 14px;
  color: var(--color-green-dark);
  font-size: 16px;
  font-weight: 800;
  line-height: 1.55;
  white-space: nowrap;
}

.document-archive a,
.archive-button {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 58px;
  padding: 14px 28px 14px 24px;
  color: var(--color-white);
  background: var(--color-green);
  border-radius: 7px;
  font-size: 15px;
  font-weight: 800;
  line-height: 1.45;
  white-space: nowrap;
  box-shadow: 0 12px 28px rgba(7, 91, 82, .16);
  transition: background-color .2s ease, transform .2s ease;
}

.document-archive a::after,
.archive-button::after {
  content: "";
  position: absolute;
  top: 50%;
  right: 18px;
  width: 20px;
  height: 20px;
  background: url("../images/download-icon-white.svg") center / contain no-repeat;
  transform: translateY(-50%);
}

.document-archive a:hover,
.archive-button:hover {
  background: var(--color-green-dark);
  transform: translateY(-1px);
}

.x-link-section {
  padding: 46px 0 48px;
  background: var(--color-white);
}

.x-official-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  min-width: 220px;
  min-height: 56px;
  padding: 13px 28px;
  color: var(--color-white);
  background: #000;
  border-radius: 7px;
  font-size: 15px;
  font-weight: 800;
  line-height: 1.2;
  box-shadow: 0 12px 28px rgba(0, 0, 0, .14);
  transition: opacity .2s ease, transform .2s ease;
}

.x-official-button img {
  width: 18px;
  height: 18px;
  object-fit: contain;
}

.x-official-button:hover {
  opacity: .86;
  transform: translateY(-1px);
}

.about {
  padding: 100px 0 104px;
}

.about__grid {
  display: grid;
  grid-template-columns: minmax(360px, 455px) 1fr;
  gap: 92px;
  align-items: center;
}

.about h2 {
  margin: 0;
  font-size: 34px;
  line-height: 1.45;
  font-weight: 800;
}

.about__text {
  margin: 0;
  color: var(--color-muted);
  font-size: 15px;
  line-height: 2.2;
}

.overview {
  padding: 88px 0 92px;
}

.overview__grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 18px;
}

.info-card {
  grid-column: span 2;
  min-height: 116px;
  padding: 25px 20px 22px;
  background: var(--color-white);
  border: 1px solid rgba(214, 232, 230, .82);
  border-radius: 4px;
  text-align: center;
  box-shadow: var(--shadow-card);
}

.info-card--wide {
  grid-column: span 3;
}

.info-card h3 {
  margin: 0 0 8px;
  color: var(--color-green-dark);
  font-size: 16px;
  font-weight: 800;
}

.info-card p {
  margin: 0;
  color: var(--color-muted);
  font-size: 13px;
  line-height: 1.7;
}

.projects {
  padding: 98px 0 80px;
}

.project-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  padding-top: 28px;
}

.project-card {
  position: relative;
  min-height: 184px;
  padding: 50px 28px 26px;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  text-align: center;
}

.project-card__number {
  position: absolute;
  left: 50%;
  top: -23px;
  margin: 0;
  color: var(--color-green);
  font-size: 42px;
  line-height: 1;
  font-family: Arial, Helvetica, sans-serif;
  font-weight: 700;
  transform: translateX(-50%);
}

.project-card h3 {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.55;
  font-weight: 800;
}

.project-card p:not(.project-card__number) {
  margin: 0;
  color: var(--color-muted);
  font-size: 13px;
  line-height: 1.75;
}

.projects__note {
  margin: 26px 0 0;
  color: #7a8a8d;
  font-size: 12px;
  text-align: center;
}

.ideas {
  padding: 74px 0 90px;
  background-color: var(--color-white);
  background-image:
    linear-gradient(rgba(12, 120, 103, .045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(12, 120, 103, .045) 1px, transparent 1px);
  background-size: 16px 16px;
}

.ideas__lead {
  margin: 42px 0 0;
  color: var(--color-muted);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.5;
}

.idea-collection {
  padding: 86px 0 92px;
  background:
    linear-gradient(135deg, rgba(38, 168, 155, .96) 0%, rgba(71, 199, 183, .92) 52%, rgba(168, 234, 224, .88) 100%);
}

.idea-collection .section-label,
.idea-collection h2 {
  color: var(--color-white);
}

.idea-collection .section-heading h2::after {
  background: var(--color-white);
}

.idea-collection--download-only {
  background-color: var(--color-white);
  background-image:
    linear-gradient(rgba(12, 120, 103, .045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(12, 120, 103, .045) 1px, transparent 1px);
  background-size: 16px 16px;
}

.idea-collection--download-only .section-label {
  color: var(--color-green);
}

.idea-collection--download-only h2 {
  color: var(--color-ink);
}

.idea-collection--download-only .section-heading h2::after {
  background: var(--color-green);
}

.collection-card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
  margin-top: 58px;
}

.collection-card a {
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
  background: var(--color-white);
  border: 1px solid rgba(214, 232, 230, .88);
  border-radius: 6px;
  box-shadow: var(--shadow-card);
  transition: border-color .2s ease, transform .2s ease;
}

.collection-card a:hover {
  border-color: rgba(12, 120, 103, .42);
  transform: translateY(-2px);
}

.collection-card__thumb {
  display: block;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  background: var(--color-green-light);
}

.collection-card__thumb img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .3s ease;
}

.collection-card a:hover .collection-card__thumb img {
  transform: scale(1.04);
}

.collection-card__body {
  display: flex;
  flex: 1;
  flex-direction: column;
  align-items: flex-start;
  padding: 18px 18px 20px;
  text-align: left;
}

.collection-card__category {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 26px;
  padding: 4px 11px;
  color: var(--color-white);
  background: var(--color-green);
  border-radius: 999px;
  font-size: 11px;
  font-weight: 800;
  line-height: 1.2;
  white-space: nowrap;
}

.collection-card__category--awareness {
  background: #2a89a8;
}

.collection-card h3 {
  margin: 13px 0 14px;
  font-size: 17px;
  font-weight: 800;
  line-height: 1.55;
}

.collection-card__target {
  display: block;
  margin-top: auto;
  color: var(--color-muted);
  font-size: 13px;
  font-weight: 700;
  line-height: 1.7;
}

.collection-card__target b {
  display: block;
  margin-bottom: 3px;
  color: var(--color-green-dark);
  font-size: 12px;
  font-weight: 800;
}

.collection-detail-section {
  padding: 86px 0 96px;
  background: var(--color-white);
}

.collection-detail-card {
  scroll-margin-top: 96px;
  display: grid;
  grid-template-columns: minmax(280px, 40%) 1fr;
  gap: 34px;
  padding: 34px;
  background: var(--color-white);
  border: 1px solid rgba(214, 232, 230, .88);
  border-radius: 8px;
  box-shadow: var(--shadow-card);
}

.collection-detail-card + .collection-detail-card {
  margin-top: 34px;
}

.collection-detail-card__image {
  margin: 0;
  overflow: hidden;
  align-self: start;
  border-radius: 6px;
  background: var(--color-green-light);
}

.collection-detail-card__image img {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.collection-detail-card__image figcaption {
  padding: 7px 10px 9px;
  color: var(--color-muted);
  background: var(--color-white);
  font-size: 11px;
  font-weight: 700;
  line-height: 1.4;
  text-align: right;
}

.collection-detail-card__body h3 {
  margin: 14px 0 18px;
  font-size: clamp(24px, 2.5vw, 32px);
  font-weight: 800;
  line-height: 1.45;
}

.collection-detail-card__body h4 {
  margin: 28px 0 10px;
  padding-left: 13px;
  border-left: 4px solid var(--color-green);
  font-size: 18px;
  font-weight: 800;
  line-height: 1.5;
}

.collection-detail-card__body p,
.collection-detail-card__body li,
.collection-summary dd {
  color: #405358;
  font-size: 14px;
  line-height: 1.95;
}

.collection-detail-card__body p,
.collection-detail-card__body ul {
  margin: 0;
}

.collection-detail-card__body ul {
  padding-left: 1.2em;
}

.collection-summary {
  margin: 0 0 4px;
}

.collection-summary div {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 14px;
  padding: 14px 16px;
  background: var(--color-green-light);
  border-radius: 6px;
}

.collection-summary dt {
  color: var(--color-green-dark);
  font-size: 13px;
  font-weight: 800;
  line-height: 1.7;
}

.collection-summary dd {
  margin: 0;
  font-weight: 700;
}

.idea-download-button {
  width: min(100%, 500px);
  margin: 42px auto 0;
}

.idea-card-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
  margin-top: 58px;
}

.idea-card a {
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
  background: var(--color-white);
  border: 1px solid rgba(214, 232, 230, .88);
  border-radius: 6px;
  box-shadow: var(--shadow-card);
  transition: border-color .2s ease, transform .2s ease;
}

.idea-card a:hover {
  border-color: rgba(12, 120, 103, .42);
  transform: translateY(-2px);
}

.idea-card__thumb {
  position: relative;
  display: block;
  overflow: hidden;
  aspect-ratio: 4 / 3;
  background: var(--color-green-light);
}

.idea-card--new .idea-card__thumb::before {
  content: "NEW";
  position: absolute;
  top: 10px;
  left: 10px;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 48px;
  min-height: 24px;
  padding: 4px 9px;
  color: var(--color-white);
  background: #d54c48;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 800;
  line-height: 1;
  box-shadow: 0 6px 16px rgba(0, 0, 0, .16);
}

.idea-card__thumb img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .3s ease;
}

.idea-card a:hover .idea-card__thumb img {
  transform: scale(1.04);
}

.idea-card__body {
  display: flex;
  flex: 1;
  flex-direction: column;
  align-items: flex-start;
  padding: 16px 16px 18px;
  text-align: left;
}

.idea-card__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
}

.idea-card__date {
  color: var(--color-muted);
  font-size: 12px;
  font-weight: 800;
  line-height: 1.2;
}

.idea-card__category,
.article-category {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 24px;
  padding: 3px 10px;
  color: var(--color-green-dark);
  background: var(--color-green-light);
  border-radius: 999px;
  font-size: 11px;
  font-weight: 800;
  line-height: 1.2;
  white-space: nowrap;
}

.idea-card h3 {
  margin: 0;
  font-size: 15px;
  font-weight: 800;
  line-height: 1.55;
}

.idea-card__more {
  margin-top: auto;
  padding: 8px 14px;
  color: var(--color-green);
  background: var(--color-white);
  border: 1px solid rgba(12, 120, 103, .34);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 800;
  line-height: 1.2;
}

.idea-card__more::after {
  content: "";
  display: inline-block;
  width: 7px;
  height: 7px;
  margin-left: 7px;
  border-top: 2px solid currentColor;
  border-right: 2px solid currentColor;
  transform: translateY(-1px) rotate(45deg);
}

.ideas__button-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 18px;
  margin-top: 42px;
  text-align: center;
}

.ideas__button-wrap .idea-download-button {
  margin: 0;
}

.outline-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 260px;
  min-height: 54px;
  padding: 12px 28px;
  color: var(--color-green);
  background: var(--color-white);
  border: 2px solid var(--color-green);
  border-radius: 7px;
  font-size: 15px;
  font-weight: 800;
  line-height: 1.35;
  transition: color .2s ease, background-color .2s ease, transform .2s ease;
}

.outline-button:hover {
  color: var(--color-white);
  background: var(--color-green);
  transform: translateY(-1px);
}

.coming-soon {
  margin: 20px 0 0;
  color: var(--color-green);
  font-size: clamp(32px, 4.2vw, 58px);
  line-height: 1;
  font-weight: 800;
  letter-spacing: .04em;
}

.subpage-main {
  background: var(--color-white);
}

.page-title {
  padding: 78px 0 70px;
  background-color: var(--color-green-light);
  background-image:
    linear-gradient(rgba(12, 120, 103, .05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(12, 120, 103, .05) 1px, transparent 1px);
  background-size: 16px 16px;
  text-align: center;
}

.page-title h2 {
  position: relative;
  display: inline-block;
  margin: 0;
  font-size: 34px;
  font-weight: 800;
  line-height: 1.45;
}

.page-title h2::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -12px;
  width: 52px;
  height: 3px;
  background: var(--color-green);
  border-radius: 999px;
  transform: translateX(-50%);
}

.idea-list-page {
  padding: 86px 0 96px;
}

.idea-list-page .idea-card-grid {
  margin-top: 0;
}

.idea-filter {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin: 0 0 36px;
}

.idea-filter a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  padding: 8px 16px;
  color: var(--color-green-dark);
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 800;
  line-height: 1.25;
  transition: color .2s ease, background-color .2s ease, border-color .2s ease;
}

.idea-filter a:hover,
.idea-filter .is-current {
  color: var(--color-white);
  background: var(--color-green);
  border-color: var(--color-green);
}

.pagination {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  margin-top: 46px;
}

.pagination a,
.pagination span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 42px;
  min-height: 42px;
  padding: 8px 13px;
  color: var(--color-green);
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  font-size: 14px;
  font-weight: 800;
  line-height: 1.2;
}

.pagination .is-current,
.pagination .current {
  color: var(--color-white);
  background: var(--color-green);
  border-color: var(--color-green);
}

.idea-detail-section {
  padding: 86px 0 96px;
}

.idea-article {
  width: min(100% - 80px, 860px);
  margin-inline: auto;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
}

.article-date {
  color: var(--color-muted);
  font-size: 13px;
  font-weight: 800;
  line-height: 1.2;
}

.idea-article h3 {
  margin: 0;
  font-size: clamp(28px, 3.2vw, 40px);
  font-weight: 800;
  line-height: 1.45;
}

.article-lead {
  margin: 24px 0 0;
  color: var(--color-muted);
  font-size: 16px;
  font-weight: 700;
  line-height: 2;
}

.article-eyecatch {
  margin: 42px 0 0;
  overflow: hidden;
  border-radius: 6px;
  background: var(--color-green-light);
}

.article-eyecatch img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.article-body {
  margin-top: 46px;
}

.article-body h4 {
  margin: 42px 0 14px;
  padding-left: 16px;
  border-left: 4px solid var(--color-green);
  font-size: 22px;
  font-weight: 800;
  line-height: 1.55;
}

.article-body p {
  margin: 0 0 22px;
  color: #405358;
  font-size: 15px;
  line-height: 2.05;
}

.article-photo-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  margin: 20px 0 26px;
}

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

.article-photo {
  margin: 0;
  overflow: hidden;
  background: #d9dede;
  border-radius: 6px;
}

.article-photo img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.backnumber {
  margin-top: 72px;
  padding-top: 58px;
  border-top: 1px solid var(--color-border);
}

.backnumber h3,
.article-pager h3 {
  margin: 0 0 26px;
  font-size: 22px;
  font-weight: 800;
  line-height: 1.45;
  text-align: center;
}

.backnumber-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.backnumber-list a {
  display: block;
  height: 100%;
  padding: 18px;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  transition: border-color .2s ease, transform .2s ease;
}

.backnumber-list a:hover {
  border-color: rgba(12, 120, 103, .42);
  transform: translateY(-1px);
}

.backnumber-list span {
  display: block;
  margin-bottom: 8px;
  color: var(--color-muted);
  font-size: 12px;
  font-weight: 800;
}

.backnumber-list strong {
  display: block;
  font-size: 14px;
  line-height: 1.65;
}

.article-pager {
  margin-top: 54px;
}

.pager-links {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 16px;
  align-items: center;
}

.pager-links a {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 54px;
  padding: 12px 18px;
  color: var(--color-green);
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  font-size: 14px;
  font-weight: 800;
  line-height: 1.45;
  text-align: center;
  transition: border-color .2s ease, transform .2s ease;
}

.pager-links a:hover {
  border-color: rgba(12, 120, 103, .42);
  transform: translateY(-1px);
}

.pager-links .pager-links__index {
  min-width: 170px;
  color: var(--color-white);
  background: var(--color-green);
  border-color: var(--color-green);
}

.faq {
  padding: 90px 0 104px;
  background: #fafafa;
}

.faq-list,
.faq-detail-list {
  margin-top: 64px;
}

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

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

.faq-list summary {
  position: relative;
  display: block;
  padding: 23px 52px 23px 0;
  cursor: pointer;
  font-size: 15px;
  font-weight: 800;
  list-style: none;
}

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

.faq-list summary::after {
  content: "+";
  position: absolute;
  top: 50%;
  right: 10px;
  color: var(--color-green);
  font-size: 22px;
  font-weight: 400;
  transform: translateY(-50%);
}

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

.faq-list p {
  margin: -4px 0 24px;
  color: var(--color-muted);
  font-size: 14px;
  line-height: 1.9;
}

.faq-detail-list {
  background: transparent;
}

.faq-detail {
  padding: 0;
  border-bottom: 0;
  margin-top: 16px;
}

.faq-detail:first-child {
  margin-top: 0;
}

.faq-detail summary {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 0;
  margin: 0;
  padding: 18px 64px 18px 24px;
  color: var(--color-ink);
  background: var(--color-white);
  border: 1px solid #d8e8e6;
  border-radius: 7px;
  cursor: pointer;
  font-size: 15px;
  font-weight: 800;
  line-height: 1.55;
  list-style: none;
  box-shadow: 0 10px 24px rgba(18, 93, 87, .03);
}

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

.faq-detail summary::after {
  content: "";
  position: absolute;
  top: 50%;
  right: 24px;
  width: 9px;
  height: 9px;
  border-right: 3px solid var(--color-green);
  border-bottom: 3px solid var(--color-green);
  transform: translateY(-65%) rotate(45deg);
  transition: transform .2s ease;
}

.faq-detail[open] summary::after {
  transform: translateY(-35%) rotate(-135deg);
}

.faq-detail summary span:first-child {
  display: inline-flex;
  justify-content: center;
  min-width: 28px;
  margin-right: 14px;
  color: var(--color-green);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 24px;
  font-weight: 800;
  line-height: 1.2;
}

.faq-detail__answer > span {
  display: inline-flex;
  justify-content: center;
  min-width: 28px;
  color: #b95752;
  font-family: Arial, Helvetica, sans-serif;
  font-size: 24px;
  font-weight: 800;
  line-height: 1.2;
}

.faq-detail__answer {
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 14px;
  margin-top: 0;
  padding: 22px 26px 26px;
  background: var(--color-white);
  border: 1px solid #d8e8e6;
  border-top: 0;
  border-radius: 0 0 7px 7px;
}

.faq-detail:not([open]) .faq-detail__answer {
  display: none;
}

.faq-detail__answer p,
.faq-detail__answer li,
.schedule-table {
  color: #34484d;
  font-size: 15px;
  font-weight: 800;
  line-height: 1.75;
}

.faq-detail__answer p {
  margin: 0;
}

.faq-number-list {
  margin: 2px 0 0;
  padding-left: 0;
  list-style: none;
}

.faq-number-list li {
  position: static;
  margin-top: 12px;
}

.faq-detail ul {
  margin: 0;
  padding-left: 1.6em;
  list-style: none;
}

.faq-detail ul li::before {
  content: "・";
  margin-left: -1em;
}

.schedule-table {
  width: min(100%, 760px);
  margin-top: 8px;
  border-collapse: collapse;
  line-height: 1.35;
}

.schedule-table th,
.schedule-table td {
  padding: 4px 10px;
  border: 1px solid #333;
  text-align: left;
  vertical-align: middle;
}

.schedule-table th {
  width: 44%;
  background: #e9f8f6;
  font-weight: 800;
}

.site-footer {
  overflow: hidden;
  color: var(--color-white);
  background:
    linear-gradient(116deg, rgba(42, 176, 184, .96) 0%, rgba(69, 206, 176, .96) 55%, rgba(91, 219, 174, .96) 100%);
}

.site-footer__inner {
  position: relative;
  padding: 82px 0 34px;
}

.site-footer__label {
  margin: 0 0 10px !important;
  font-size: 13px !important;
  font-weight: 800;
  line-height: 1.2 !important;
}

.site-footer h2 {
  position: relative;
  margin: 0;
  font-size: 42px;
  line-height: 1.35;
  font-weight: 800;
  white-space: nowrap;
}

.site-footer__body {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 260px minmax(300px, 1fr) auto;
  gap: 52px;
  align-items: center;
}

.site-footer__name {
  margin: 0 0 2px;
  font-size: 18px;
  font-weight: 800;
}

.site-footer p,
.site-footer address {
  margin: 0;
  font-style: normal;
  font-size: 16px;
  line-height: 1.9;
}

.site-footer__contact address {
  margin-top: 26px;
  font-weight: 800;
}

.site-footer__badges {
  display: flex;
  gap: 16px;
  align-items: center;
}

.site-footer__badges a {
  display: block;
  transition: opacity .2s ease, transform .2s ease;
}

.site-footer__badges a:hover {
  opacity: .86;
  transform: translateY(-1px);
}

.site-footer__badges img {
  display: block;
  width: 104px;
  height: 104px;
  object-fit: contain;
  background: var(--color-white);
  border-radius: 2px;
}

.site-footer__note {
  position: relative;
  z-index: 1;
  margin-top: 26px !important;
  font-weight: 800;
}

.site-footer__copyright {
  position: relative;
  z-index: 1;
  margin-top: 52px !important;
  font-size: 12px !important;
  font-weight: 700;
  opacity: .82;
  text-align: center;
}

@media (max-width: 960px) {
  .pc-only {
    display: none;
  }

  .sp-only {
    display: inline;
  }

  .site-header {
    height: auto;
    position: sticky;
    backdrop-filter: none;
  }

  .site-header__inner {
    width: min(100% - 32px, 720px);
    min-height: 72px;
    flex-wrap: nowrap;
    padding: 14px 0;
    gap: 14px;
  }

  .site-logo {
    min-width: 0;
  }

  .site-nav {
    position: fixed;
    top: auto;
    left: 12px;
    right: 12px;
    bottom: 12px;
    z-index: 30;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
    width: auto;
    padding: 8px;
    background: rgba(255, 255, 255, .96);
    border: 1px solid rgba(12, 120, 103, .14);
    border-radius: 10px;
    box-shadow: 0 14px 40px rgba(7, 91, 82, .16);
    overflow: visible;
    white-space: normal;
    backdrop-filter: blur(16px);
  }

  .site-nav a {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 7px 8px;
    border-radius: 7px;
    color: var(--color-green-dark);
    background: #eef9f7;
    font-size: 12px;
    line-height: 1.25;
    text-align: center;
  }

  .site-nav__button {
    color: var(--color-white) !important;
    background: var(--color-green) !important;
  }

  .hero__inner {
    grid-template-columns: 1fr;
    min-height: 560px;
    padding: 72px 32px;
  }

  .container,
  .container--narrow {
    width: min(100% - 40px, 720px);
  }

  .about__grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .overview__grid,
  .project-list,
  .idea-card-grid,
  .collection-card-grid,
  .site-footer__body {
    grid-template-columns: 1fr;
  }

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

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

  .collection-detail-card {
    grid-template-columns: 1fr;
  }

  .backnumber-list {
    grid-template-columns: 1fr;
  }

  .idea-article {
    width: min(100% - 40px, 720px);
  }

  .project-list {
    gap: 46px;
  }

  .site-footer__body {
    gap: 32px;
    align-items: start;
  }

  .info-card,
  .info-card--wide {
    grid-column: span 1;
  }
}

@media (max-width: 640px) {
  body {
    font-size: 15px;
    padding-bottom: 86px;
  }

  .site-header {
    position: relative;
    height: 68px;
    border-bottom: 0;
  }

  .site-header__inner {
    width: 100%;
    min-height: 68px;
    padding: 5px 29px 6px;
  }

  .site-logo__mark {
    font-size: 28px;
    line-height: 1.04;
  }

  .site-logo__text {
    font-size: 23px;
    line-height: 1.12;
  }

  .hero {
    background:
      linear-gradient(90deg, rgba(10, 112, 104, .2), rgba(10, 112, 104, .04)),
      url("../images/Kx-bg-sp.jpg") center top / cover no-repeat,
      #208f8a;
  }

  .site-nav {
    gap: 6px;
  }

  .site-nav__button {
    min-height: 44px;
    padding: 7px 8px;
  }

  .hero__inner {
    display: block;
    min-height: 592px;
    padding: 36px 20px 44px;
  }

  .hero__lead {
    margin-bottom: 16px;
    font-size: clamp(16px, 4.25vw, 18px);
    line-height: 1.55;
    font-weight: 800;
  }

  .hero h1 {
    font-size: clamp(45px, 12vw, 62px);
    line-height: 1.18;
    letter-spacing: .01em;
  }

  .hero__copy {
    width: 100%;
    margin: 15px 0 14px;
    font-size: clamp(16px, 4.4vw, 19px);
    line-height: 1.65;
    font-weight: 800;
  }

  .period-card {
    min-width: 0;
    width: 100%;
    border-radius: 0 0 12px 12px;
  }

  .period-card__banner {
    min-height: 54px;
    padding: 10px 12px 11px;
    font-size: clamp(18px, 4.9vw, 24px);
    line-height: 1.25;
  }

  .period-card__body {
    align-items: center;
    flex-direction: column;
    gap: 8px;
    min-height: 112px;
    padding: 10px 14px 12px;
    border-radius: 0 0 12px 12px;
    background: rgba(255, 255, 255, .93);
  }

  .period-card__body > span {
    width: 190px;
    min-width: 190px;
    height: 37px;
    color: var(--color-green);
    background: transparent;
    border: 3px solid var(--color-green);
    border-radius: 8px;
    font-size: 20px;
    line-height: 1.05;
  }

  .period-card__body > span br {
    display: none;
  }

  .period-card__date-text {
    display: none;
  }

  .period-card__date-sp {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 0;
    color: var(--color-green);
    font-family: Arial, Helvetica, sans-serif;
    font-weight: 800;
    line-height: 1;
    white-space: nowrap;
  }

  .period-card__year {
    margin-right: 2px;
    font-size: clamp(17px, 4.6vw, 22px);
  }

  .period-card__month {
    display: inline-flex;
    align-items: baseline;
  }

  .period-card__month-number,
  .period-card__day-number {
    font-size: clamp(27px, 7.4vw, 36px);
  }

  .period-card__month-unit,
  .period-card__day-unit {
    font-size: clamp(17px, 4.5vw, 22px);
  }

  .period-card__day {
    display: inline-flex;
    align-items: baseline;
    letter-spacing: 0;
  }

  .period-card__weekday {
    align-self: center;
    display: inline-grid;
    place-items: center;
    width: clamp(22px, 5.8vw, 28px);
    height: clamp(22px, 5.8vw, 28px);
    margin-left: 2px;
    color: var(--color-white);
    background: var(--color-green);
    border-radius: 50%;
    font-size: clamp(11px, 3vw, 14px);
    letter-spacing: 0;
  }

  .period-card__arrow {
    align-self: center;
    width: clamp(18px, 4.8vw, 24px);
    height: auto;
    margin: 0 3px;
  }

  .section,
  .about,
  .overview,
  .projects,
  .idea-collection,
  .ideas,
  .idea-list-page,
  .idea-detail-section,
  .collection-detail-section,
  .faq {
    padding: 66px 0;
  }

  .page-title {
    padding: 58px 0 54px;
  }

  .application-block {
    padding: 56px 0 60px;
  }

  .document-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
    margin-top: 30px;
  }

  .document-list a {
    min-height: 88px;
    padding: 12px 28px 12px 10px;
    font-size: 12px;
    line-height: 1.45;
  }

  .document-list a::after {
    right: 10px;
    width: 16px;
    height: 16px;
  }

  .document-archive {
    width: 100%;
    margin-top: 28px;
  }

  .document-archive p {
    font-size: clamp(13px, 3.7vw, 15px);
  }

  .document-archive a,
  .archive-button {
    min-height: 58px;
    padding: 12px 42px 12px 14px;
    font-size: clamp(12px, 3.5vw, 14px);
  }

  .document-archive a::after,
  .archive-button::after {
    right: 16px;
    width: 18px;
    height: 18px;
  }

  .x-link-section {
    padding: 34px 0 36px;
  }

  .x-official-button {
    min-width: 200px;
    min-height: 52px;
    padding: 12px 24px;
    font-size: 14px;
  }

  .section-heading h2,
  .application-block h2,
  .ideas h2,
  .faq h2 {
    font-size: 26px;
  }

  .about h2 {
    font-size: 27px;
  }

  .project-card {
    min-height: auto;
  }

  .coming-soon {
    font-size: 34px;
  }

  .idea-card-grid {
    gap: 12px;
    margin-top: 42px;
  }

  .collection-card-grid {
    gap: 12px;
    margin-top: 42px;
  }

  .collection-card__body {
    padding: 13px 12px 15px;
  }

  .collection-card__category {
    min-height: 23px;
    padding: 3px 8px;
    font-size: 10px;
  }

  .collection-card h3 {
    margin: 10px 0 10px;
    font-size: 13px;
    line-height: 1.55;
  }

  .collection-card__target {
    font-size: 11px;
    line-height: 1.55;
  }

  .collection-card__target b {
    font-size: 10px;
  }

  .collection-detail-card {
    scroll-margin-top: 16px;
    gap: 22px;
    padding: 20px;
  }

  .collection-detail-card + .collection-detail-card {
    margin-top: 22px;
  }

  .collection-detail-card__body h3 {
    font-size: 22px;
  }

  .collection-detail-card__body h4 {
    margin-top: 24px;
    font-size: 17px;
  }

  .collection-summary div {
    grid-template-columns: 1fr;
    gap: 4px;
    padding: 12px 14px;
  }

  .collection-detail-card__body p,
  .collection-detail-card__body li,
  .collection-summary dd {
    font-size: 13px;
    line-height: 1.85;
  }

  .idea-card__body {
    padding: 12px 12px 14px;
  }

  .idea-card--new .idea-card__thumb::before {
    top: 8px;
    left: 8px;
    min-width: 42px;
    min-height: 22px;
    font-size: 10px;
  }

  .idea-card__date {
    font-size: 11px;
  }

  .idea-card__category,
  .article-category {
    min-height: 22px;
    padding: 3px 8px;
    font-size: 10px;
  }

  .idea-card h3 {
    font-size: 13px;
    line-height: 1.55;
  }

  .idea-card__more {
    padding: 7px 12px;
    font-size: 12px;
  }

  .ideas__button-wrap {
    margin-top: 32px;
  }

  .outline-button {
    width: 100%;
    min-width: 0;
    min-height: 52px;
    padding: 12px 18px;
    font-size: 14px;
  }

  .idea-filter {
    justify-content: flex-start;
    gap: 8px;
    margin-bottom: 28px;
  }

  .idea-filter a {
    min-height: 34px;
    padding: 7px 12px;
    font-size: 12px;
  }

  .page-title h2 {
    font-size: 28px;
  }

  .idea-article h3 {
    font-size: 26px;
  }

  .article-lead {
    font-size: 15px;
    line-height: 1.9;
  }

  .article-eyecatch {
    margin-top: 30px;
  }

  .article-body {
    margin-top: 34px;
  }

  .article-body h4 {
    margin-top: 34px;
    font-size: 19px;
  }

  .article-photo-grid,
  .article-photo-grid--two {
    grid-template-columns: 1fr;
  }

  .backnumber {
    margin-top: 52px;
    padding-top: 42px;
  }

  .pager-links {
    grid-template-columns: 1fr;
  }

  .faq-list summary {
    padding-right: 42px;
  }

  .faq-detail summary {
    padding: 16px 46px 16px 18px;
    font-size: 14px;
  }

  .faq-detail summary::after {
    right: 20px;
    width: 8px;
    height: 8px;
    border-width: 2px;
  }

  .faq-detail__answer > span {
    min-width: 24px;
    font-size: 22px;
  }

  .faq-detail summary span:first-child {
    min-width: 24px;
    margin-right: 12px;
    font-size: 22px;
  }

  .faq-detail__answer {
    grid-template-columns: 24px 1fr;
    gap: 12px;
    padding: 18px 18px 22px;
  }

  .faq-detail__answer p,
  .faq-detail__answer li,
  .schedule-table {
    font-size: 14px;
    line-height: 1.75;
  }

  .schedule-table th,
  .schedule-table td {
    display: block;
    width: 100%;
    border-bottom: 0;
  }

  .schedule-table tr {
    display: block;
    border-bottom: 1px solid #333;
  }

  .schedule-table tr:first-child th {
    border-top: 1px solid #333;
  }

  .site-footer__inner {
    padding: 58px 0 36px;
  }

  .site-footer h2 {
    font-size: 30px;
  }

  .site-footer__badges {
    gap: 12px;
  }

  .site-footer__badges img {
    width: 82px;
    height: 82px;
  }
}