/* ===== リセット・ベース ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --color-bg:       #f7f7f1;
  --color-text:     #3b3932;
  --color-title:    #4774b9;
  --color-accent:   #4774b9;
  --color-accent-light: #edf2f9;
  --color-white:    #ffffff;
  --color-border:   #d8d0c4;
  --font-main:      'Noto Sans JP', 'Hiragino Kaku Gothic ProN', sans-serif;
  --fw-regular:     400;
  --fw-medium:      500;
  --container-w:    1000px;
  --header-w:       1380px;
  --header-h:       60px;
}

html { font-size: 16px; scroll-behavior: smooth; }
body {
  font-family: var(--font-main);
  font-weight: var(--fw-regular);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.75;
  letter-spacing: .08em;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
.sp-br { display: none; }
a { color: var(--color-accent); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-main);
  font-weight: var(--fw-medium);
  color: var(--color-title);
}

.container {
  width: min(var(--container-w), 100% - 2rem);
  margin-inline: auto;
}

/* ===== ヘッダー ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-bg);
  height: 100px;
  transition: height .3s ease;
}
.site-header.is-scrolled {
  height: var(--header-h);
}
.sato-umi-page .site-header {
  background: var(--color-white);
}
.home {
  background: var(--color-bg);
}
.site-header__inner {
  display: flex;
  align-items: center;
  gap: 1rem;
  height: 100%;
  width: min(var(--header-w), 100% - 2rem);
  margin-inline: auto;
}

/* ロゴ */
.site-header__logo { flex-shrink: 0; margin-left: 1rem; }
.site-header__logo a { display: block; text-decoration: none; }
.site-header__logo img { width: clamp(160px, 21vw, 288px); height: auto; }

/* グローバルナビ */
.site-nav { margin-left: auto; }
.site-nav__list {
  display: flex;
  list-style: none;
  gap: 0;
}
.site-nav__list li a {
  display: inline-flex;
  align-items: center;
  gap: 0.2rem;
  font-size: clamp(11px, 1.1vw, 16px);
  font-weight: var(--fw-regular);
  color: var(--color-text);
  padding: .4rem clamp(.1rem, .3vw, .4rem);
  white-space: nowrap;
  transition: color .2s;
  text-decoration: none;
  letter-spacing: 0;
}
.site-nav__list li a:hover { color: var(--color-accent); }
.site-nav__list li.current-menu-item a { color: var(--color-accent); }

/* ○の中の > */
.nav-arrow {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  border: 1.5px solid var(--color-accent);
  border-radius: 50%;
  flex-shrink: 0;
  position: relative;
  margin-right: 0.4rem;
}
.nav-arrow::after {
  content: '';
  display: block;
  width: 5px;
  height: 5px;
  border-top: 1.5px solid var(--color-accent);
  border-right: 1.5px solid var(--color-accent);
  transform: rotate(45deg) translate(-1px, 1px);
}

/* お問合せボタン */
.btn--contact {
  flex-shrink: 0;
  margin-right: 1rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 150px;
  height: 36px;
  font-size: 14px;
  font-weight: var(--fw-regular);
  border: 1.5px solid var(--color-accent);
  border-radius: 18px;
  color: var(--color-accent);
  background: var(--color-white);
  white-space: nowrap;
  transition: background .2s, color .2s;
  text-decoration: none;
  letter-spacing: 0;
}
.btn--contact:hover {
  background: var(--color-accent);
  color: var(--color-white);
  text-decoration: none;
}

/* ハンバーガー */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 7px;
  background: none;
  border: none;
  cursor: pointer;
  padding: .5rem;
  margin-left: .5rem;
}
.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform .3s, opacity .3s;
}

/* ===== ボタン共通 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .4rem;
  font-size: .85rem;
  padding: .55rem 1.4rem;
  border-radius: 20px;
  cursor: pointer;
  transition: background .2s, color .2s, border-color .2s;
}
.btn--outline {
  border: 1px solid var(--color-accent);
  color: var(--color-accent);
  background: transparent;
}
.btn--outline:hover {
  background: var(--color-accent);
  color: var(--color-white);
  text-decoration: none;
}
.btn--more {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .4rem;
  height: 41px;
  padding-inline: 2rem;
  border: 1.5px solid var(--color-accent);
  color: var(--color-accent);
  background: transparent;
  font-size: 16px;
  font-weight: var(--fw-regular);
  border-radius: 41px;
  text-decoration: none;
  transition: background .2s, color .2s;
  letter-spacing: 0em;
}
.btn--more::after {
  content: '>';
  font-size: .9em;
}
.btn--more:hover {
  background: var(--color-accent);
  color: var(--color-white);
  text-decoration: none;
}
.btn--activity {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: .4rem;
  width: 240px;
  height: 41px;
  margin-inline: auto;
  background: var(--color-white);
  border: 1.5px solid var(--color-accent);
  border-radius: 41px;
  font-size: 15px;
  font-weight: var(--fw-regular);
  color: var(--color-accent);
  transition: background .2s, color .2s;
  text-decoration: none;
  letter-spacing: 0em;
}
.btn--activity::after {
  content: '>';
  font-size: .9em;
}
.btn--activity:hover {
  background: var(--color-accent);
  color: var(--color-white);
  text-decoration: none;
}
.btn--activity--colored:hover {
  background: #46c95c !important;
  border-color: #46c95c !important;
  color: #fff !important;
}

/* ===== セクションタイトル ===== */
.section-title {
  font-size: clamp(15px, 2.5vw, 28px);
  font-weight: var(--fw-medium);
  color: var(--color-title);
  text-align: center;
  margin-bottom: 3rem;
  letter-spacing: .05em;
}
.section-more {
  text-align: center;
  margin-top: 2rem;
}

/* ===== ヒーロー ===== */
.hero {
  position: relative;
  overflow: hidden;
  background: var(--color-bg);
  padding-top: 30px;
}

/* イラスト：フェードイン */
.hero__illust { display: block; line-height: 0; }
.hero__img {
  width: 100%;
  height: auto;
  display: block;
  opacity: 0;
  animation: heroImgFadeIn 2s ease forwards;
  animation-delay: .15s;
}
.hero__img--sp { display: none; }
.img--sp { display: none; }
@media (max-width: 750px) {
  .hero__img--pc { display: none; }
  .hero__img--sp { display: block; }
  .img--pc { display: none; }
  .img--sp { display: block; }
}
@keyframes heroImgFadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* テキスト：イラストの後にふわっとフェードイン */
.hero__copy {
  position: absolute;
  /* 画像1500×792px上のテキスト位置: 左から約19%、上から約8% */
  left: 38%;
  top: 2%;
  opacity: 0;
  animation: heroCopyFadeIn 1s ease forwards;
  animation-delay: .9s;
}
@keyframes heroCopyFadeIn {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}
.hero__copy p {
  font-size: clamp(18px, 2.2vw, 30px);
  font-weight: var(--fw-regular);
  line-height: 2.5;
  letter-spacing: .12em;
  writing-mode: vertical-rl;
  color: var(--color-title);
}
.hero__copy .vquote {
  text-orientation: upright;
  font-size: .85em;
  letter-spacing: -.4em;
}
@supports (-webkit-hyphens: none) {
  .hero__copy .vquote {
    letter-spacing: 0;
  }
}
.hero__copy .vquote--open  { display: inline-block; transform: translateX(.5em); }
.hero__copy .vquote--close { display: inline-block; transform: translateX(-.5em); }

/* ===== リード文 ===== */
.lead,
.lead,
.activities,
.news,
.members,
.company,
.partners-section {
  scroll-margin-top: 90px;
}
@media (max-width: 750px) {
  .lead,
  .activities,
  .news,
  .members,
  .company {
    scroll-margin-top: 80px;
  }
}
.lead {
  padding: 2rem 0 3rem;
  text-align: center;
}
.lead__text {
  font-size: clamp(14px, 1.8vw, 20px);
  font-weight: var(--fw-regular);
  color: var(--color-title);
  margin-bottom: 1.5rem;
  line-height: 2;
}
.lead__sub {
  font-size: clamp(12px, 1.4vw, 16px);
  color: var(--color-text);
  line-height: 2;
}
.lead__sub-em {
  font-size: clamp(14px, 1.8vw, 20px);
  font-weight: var(--fw-regular);
}

/* ===== 私たちのできること ===== */
.activities { padding: 5rem 0; }

/* 上段：2列 */
.activities__grid--large {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}
/* 下段：3列 */
.activities__grid--small {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-top: 106px;
}

.activity-card {
  display: flex;
  flex-direction: column;
}

/* 上段の写真 */
.activity-card__img--large {
  width: 100%;
  margin-bottom: 35px;
}
/* 下段の写真 */
.activity-card__img--tri {
  width: 100%;
  margin-bottom: 35px;
}
.activity-card__img img,
.activity-card__img--large img,
.activity-card__img--tri img {
  width: 100%;
  height: auto;
  display: block;
}

.activity-card__title {
  font-size: clamp(13px, 2vw, 22px);
  font-weight: var(--fw-medium);
  color: #3b3932;
  text-align: center;
  margin-bottom: 1.2rem;
}
.activity-card--tri .activity-card__title {
  font-size: clamp(12px, 1.6vw, 18px);
}
.activity-card__text {
  font-size: clamp(12px, 1.4vw, 16px);
  line-height: 1.8;
  color: var(--color-text);
  text-align: justify;
  letter-spacing: 0.08em;
}
.activity-card__body .btn--activity { margin-top: 30px; }

/* 3列目以降（小カード）を3列グリッドに */
.activities__grid .activity-card--small:first-of-type {
  grid-column: 1;
}

/* ===== お知らせ ===== */
.news {
  padding: 5rem 0;
  background: var(--color-bg);
}
.sato-umi-page .news {
  background: var(--color-white);
  padding: 6rem 0;
}
.news__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}
.news-card__link {
  color: var(--color-text);
  text-decoration: none;
  display: block;
}
.news-card__img {
  width: 100%;
  aspect-ratio: 3 / 2;
  border-radius: 0;
  overflow: hidden;
  background: var(--color-border);
  margin-bottom: .8rem;
}
.news-card__img-placeholder {
  width: 100%;
  height: 100%;
  background: #ddd;
}
.news-card__img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.news-card__date {
  display: block;
  font-size: 18px;
  color: #3b3932;
  margin-bottom: .1rem;
}
.news-card__title {
  font-size: 18px;
  font-weight: var(--fw-regular);
  font-family: 'Noto Sans JP', sans-serif;
  color: #3b3932;
  margin-top: 0;
  margin-bottom: .8rem;
  line-height: 1.5;
}
.news-card__excerpt {
  font-size: 16px;
  color: var(--color-text);
  line-height: 1.7;
}
.news-card__link:hover { opacity: 0.7; text-decoration: none; }
.news-card__link:hover .news-card__title { color: var(--color-accent); }

/* ===== メンバー ===== */
.members {
  padding: 5rem 0;
}
.members__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 3rem;
  max-width: 928px;
  margin-inline: auto;
  justify-items: center;
}
.member-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 240px;
  height: 100%;
}

/* アーチ型写真 */
.member-card__img {
  position: relative;
  width: 240px;
  height: 280px;
  border-radius: 120px 120px 0 0;
  overflow: hidden;
  margin-bottom: 1.5rem;
  background: var(--color-border);
}
.member-card__img-placeholder {
  width: 100%;
  height: 100%;
  background: #ddd;
}
.member-card__img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
}
.member-card__img .img-hover {
  position: absolute;
  inset: 0;
  width: 240px;
  height: 100%;
  opacity: 0;
  transition: opacity .4s ease;
}
.member-card__img:hover .img-hover { opacity: 1; }

@media (hover: none) {
  .member-card__img .img-default {
    animation: member-swap-default 6s ease-in-out infinite;
  }
  .member-card__img .img-hover {
    animation: member-swap-hover 6s ease-in-out infinite;
  }
}
@keyframes member-swap-default {
  0%, 40%  { opacity: 1; }
  50%, 90% { opacity: 0; }
  100%     { opacity: 1; }
}
@keyframes member-swap-hover {
  0%, 40%  { opacity: 0; }
  50%, 90% { opacity: 1; }
  100%     { opacity: 0; }
}

.member-card__body {
  width: 100%;
  text-align: center;
}
.member-card__role {
  font-size: 16px;
  font-weight: var(--fw-regular);
  color: var(--color-title);
  margin-bottom: .3rem;
  text-align: center;
}
.member-card__name {
  font-size: 20px;
  font-weight: var(--fw-regular);
  color: var(--color-title);
  margin-bottom: 1rem;
  letter-spacing: .1em;
  text-align: center;
}
.member-card__text {
  font-size: 16px;
  color: var(--color-text);
  line-height: 1.8;
  text-align: justify;
  margin-bottom: 1.5rem;
  letter-spacing: 0.08em;
}
.member-card__text p { margin: 0; }

/* 経歴・所属 */
.member-card__career {
  border-top: 1px dashed #4774b9;
  padding-top: 1.2rem;
  margin-top: 0;
  text-align: left;
  color: #4774b9;
  width: 100%;
  margin-top: 0;
}
.member-card__career-label {
  font-size: 16px;
  color: var(--color-title);
  text-align: center;
  margin-bottom: .8rem;
}
.member-card__career-text {
  font-size: 16px;
  color: var(--color-title);
  line-height: 1.8;
  text-align: justify;
  letter-spacing: 0.07em;
}

/* ===== 会社概要 ===== */
.company {
  padding: 5rem 0;
  background: var(--color-bg);
}
.company__table {
  width: 100%;
  border-collapse: collapse;
  font-size: 1rem;
  max-width: 820px;
  margin-inline: auto;
}
.company__table tr {
}
.company__table th {
  width: 110px;
  padding: 1rem 0;
  text-align: center;
  font-weight: 400;
  color: #3b3932;
  vertical-align: middle;
  white-space: nowrap;
  border-bottom: 1.5px solid #4774b9;
}
.company__table td {
  padding: 1rem 0 1rem 2rem;
  line-height: 2;
  vertical-align: top;
  border-bottom: 1px solid #d0d0d0;
}
.company__table ol {
  list-style: none;
  padding: 0;
  margin: 0;
  counter-reset: company-item;
}
.company__table ol li {
  counter-increment: company-item;
  display: flex;
  gap: .6rem;
  line-height: 2;
  letter-spacing: 0;
}
.company__table ol li::before {
  content: counter(company-item) " ｜";
  color: var(--color-title);
  flex-shrink: 0;
  font-variant-numeric: tabular-nums;
}

/* ===== フッター ===== */
.site-footer {
  background: var(--color-bg);
  padding: 3rem 0 0;
  font-size: 16px;
}
.home .site-footer {
  padding: 5rem 0 0;
}
.sato-umi-page .container {
  padding-bottom: 5rem;
}
.site-footer__inner {
  display: flex;
  flex-direction: row;
  align-items: flex-start;
  gap: clamp(1rem, 3vw, 3rem);
  width: min(var(--header-w), 100% - 2rem);
  margin-inline: auto;
  padding-bottom: 3rem;
}

.home .site-footer__logo-box {
  margin-top: -5rem;
}

/* ロゴボックス */
.site-footer__logo-box {
  flex-shrink: 0;
  border: none;
  width: 200px;
  height: auto;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-left: 2rem;
  margin-right: clamp(1rem, 4vw, 5rem);
}
.site-footer__logo-box img {
  width: 200px;
  height: auto;
}
.sato-umi-page .site-footer__logo-box {
  width: 258px;
}
.sato-umi-page .site-footer__logo-box img {
  width: 258px;
}

/* ナビ */
.site-footer__nav {
  display: flex;
  gap: clamp(1rem, 4vw, 4rem);
  flex: 1;
}
.site-footer__nav-col ul {
  list-style: none;
  margin-top: 0.2rem;
}
.site-footer__nav-col ul li {
  margin-bottom: 0;
}
.site-footer__nav-col ul li a {
  font-size: 14px;
  color: var(--color-text);
  text-decoration: none;
  letter-spacing: -0.04em;
}
.site-footer__nav-col ul li a::before {
  content: 'ー';
  margin-right: .4rem;
  color: var(--color-title);
}
.site-footer__nav-col ul li a[target="_blank"]::after {
  content: ' \29C9';
  font-size: .8em;
}
.site-footer__nav-col ul li a:has(.icon-link)::after {
  content: none;
}
.icon-link {
  display: inline;
  width: 12px;
  height: 12px;
  vertical-align: middle;
  margin-left: .3rem;
}
.site-footer__nav-heading {
  font-size: 14px;
  font-weight: var(--fw-medium);
  color: var(--color-text);
}

/* お問い合わせボタン */
.btn--contact-footer {
  flex-shrink: 0;
  align-self: flex-start;
  margin-right: 5rem;
  border: 1.5px solid var(--color-title);
  color: var(--color-title);
  background: #fff;
  border-radius: 999px;
  width: 160px;
  text-align: center;
  padding: .3rem 0;
  font-size: 14px;
  white-space: nowrap;
  text-decoration: none;
  margin-right: 2rem;
  letter-spacing: 0em;
}
.btn--contact-footer:hover {
  background: var(--color-title);
  color: #fff;
}

/* コピーライト */
.site-footer__bottom {
  border-top: 1px solid var(--color-border);
  padding: 1rem 0;
  text-align: right;
  width: min(var(--header-w), 100% - 2rem);
  margin-inline: auto;
}
.site-footer__copy {
  font-size: 12px;
  color: var(--color-text);
  letter-spacing: -0.04em;
}

/* ===== プロジェクトページ ===== */
body.sato-umi-page {
  background: #fff;
}

/* 里海ページ フッターロゴ */
.logo-f--sato-umi { display: none; }
.logo-f--default { position: relative; top: -20px; }
.sato-umi-page .logo-f--default { display: none; }
.sato-umi-page .logo-f--sato-umi { display: block; }
.sato-umi-page .site-footer__logo-box {
  overflow: visible;
  position: relative;
  border: none;
  background: transparent;
}
.sato-umi-page .logo-f--sato-umi {
  position: relative;
  top: -114px;
  width: 258px;
}

.page-hero {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 2rem;
}
.page-hero img {
  width: 100%;
  height: auto;
  display: block;
}
.page-hero .hero__img--sp { display: none; }
@media (max-width: 750px) {
  .page-hero .hero__img--pc { display: none; }
  .page-hero .hero__img--sp { display: block; }
}
.project-title {
  text-align: center;
  padding: 55px 0 50px;
  font-size: 34px;
  font-weight: var(--fw-regular);
}
.project-item {
  padding: 3rem 0;
}
.project-item__header {
  display: flex;
  align-items: flex-end;
  gap: 1.5rem;
  margin-bottom: 4rem;
}
.project-item:nth-of-type(2) .project-item__header {
  margin-bottom: 2rem;
}
.project-item__num {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  color: var(--color-title);
  line-height: 1;
}
.project-item__num-label {
  font-family: 'Oswald', sans-serif;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .08em;
  margin-bottom: 2px;
}
.project-item__num-value {
  font-family: 'Oswald', sans-serif;
  font-size: 42px;
  font-weight: 400;
}
.project-item__divider {
  width: 1px;
  height: 56px;
  background: var(--color-title);
  flex-shrink: 0;
}
.project-item__heading {
  font-family: 'Noto Sans JP', sans-serif;
  font-size: 28px;
  font-weight: 500;
  color: var(--color-text);
  letter-spacing: .08em;
}
.project-item__body {
  display: grid;
  align-items: center;
}
.project-item__body--text-left {
  grid-template-columns: 1fr 2fr;
  align-items: start;
  gap: 1rem;
}
.project-item__body--imgs-left {
  grid-template-columns: 1fr 1fr;
  align-items: start;
  gap: 3rem;
}
.project-item__body--imgs-left .project-item__text {
  padding-top: 2rem;
}
.project-item__imgs {
  display: flex;
}
.project-item__body--text-left .project-item__img {
  width: 100%;
  height: auto;
  display: block;
}
.project-item__body--imgs-left .project-item__img {
  width: 100%;
  height: auto;
  display: block;
}
.project-item__text {
  font-size: 16px;
  line-height: 1.8;
  letter-spacing: 0.08em;
  text-align: justify;
}

/* 協力テーブル */
.partners-section {
  padding: 6rem 0;
}
.partners-table {
  width: 540px;
  border-collapse: collapse;
  font-size: 1rem;
  margin-inline: auto;
}
.partners-table tr {
}
.partners-table th {
  width: 174px;
  padding: 0.5rem 0;
  text-align: center;
  font-weight: 400;
  color: #3b3932;
  vertical-align: middle;
  white-space: nowrap;
  border-bottom: 1.5px solid #4774b9;
}
.partners-table td {
  width: 365px;
  padding: 0.5rem 0 0.5rem 4rem;
  vertical-align: top;
  line-height: 2;
  letter-spacing: .08em;
  border-bottom: 1px solid #d0d0d0;
}

/* ===== レスポンシブ ===== */
/* ===== タブレット ===== */
@media (max-width: 1200px) {
  .site-nav, .btn--contact { display: none; }
  .hamburger { display: flex; margin-left: auto; margin-right: 1rem; }

  .site-header {
    height: var(--header-h);
  }

  .container {
    padding-inline: 1.2rem;
  }

  /* 里海ページ */
  .project-item__body--text-left,
  .project-item__body--imgs-left {
    grid-template-columns: 1fr;
  }
  .project-item__body--text-left .project-item__img {
    width: 100%;
  }
  .project-item__body--imgs-left .project-item__img {
    width: 100%;
    height: auto;
  }
  .project-item__body--imgs-left .project-item__imgs { order: 2; }
  .project-item__body--imgs-left .project-item__text { order: 1; padding-top: 0; }
  .project-item__header {
    margin-bottom: 1.5rem;
    gap: 0.5rem;
  }
  .project-item__body--text-left { gap: 0; }
  .project-item__body--imgs-left { gap: 1rem; }
  .page-hero {
    margin: 0 1rem;
  }
}

/* ===== タブレット・スマートフォン共通 ===== */
@media (max-width: 750px) {
  .container {
    width: 100%;
    padding-inline: 25px;
  }

  /* ヘッダー */
  .site-header__logo img {
    width: 466px;
  }

  /* ヒーロー */
  .hero__illust img {
    width: 100%;
  }
  .hero__copy p {
    font-size: clamp(13px, 4.5vw, 34px);
    line-height: 2;
  }
  .pc-br { display: none; }
  .sp-br { display: block; }

  /* リード */
  .lead__text {
    font-size: 28px;
  }
  .lead__sub {
    font-size: 24px;
    text-align: left;
  }
  .lead__sub-em {
    font-size: 28px;
  }

  /* アクティビティ */
  .section-title {
    font-size: 30px;
  }
  .activity-card__title {
    font-size: 24px !important;
    margin-top: .3rem;
    margin-bottom: .5rem;
  }
  .activity-card__text {
    font-size: 24px;
  }
  .btn--activity {
    font-size: 24px;
  }
  .activities__grid--large {
    grid-template-columns: 1fr;
  }
  .activity-card__img,
  .activity-card__img--large,
  .activity-card__img--tri {
    margin-bottom: 12px;
  }
  .activity-card__img--large {
    height: 220px;
  }
  .activities__grid--small {
    grid-template-columns: repeat(2, 1fr);
    gap: 25px 12px;
    margin-top: 2rem;
  }
  .activity-card__img--tri {
    height: auto;
  }
  .activity-card__img--tri img {
    width: 100%;
    height: auto;
    object-fit: unset;
  }

  /* ニュース */
  .news__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 44px;
  }
  .news-card__img {
    width: 100%;
    height: auto;
    aspect-ratio: 3 / 2;
  }
  .news-card__img img,
  .news-card__img-placeholder {
    width: 100%;
    height: 100%;
    object-fit: cover;
  }
  .news-card__body {
    font-size: 24px;
  }
  .news-card__date,
  .news-card__title,
  .news-card__excerpt {
    font-size: 24px;
  }
  .section-more {
    font-size: 24px;
  }
  .btn--more {
    font-size: 24px;
  }

  /* メンバー */
  .members__grid {
    grid-template-columns: 1fr;
    gap: 4rem;
  }
  .member-card {
    display: flex;
    flex-direction: row;
    gap: 1rem;
    width: 100%;
    height: auto;
    align-items: flex-start;
  }
  .member-card:nth-child(even) {
    flex-direction: row-reverse;
  }
  .member-card__col-img {
    flex-shrink: 1;
    flex-basis: 45%;
    text-align: center;
  }
  .member-card__img {
    width: 100%;
    height: 176px;
    border-radius: 76px 76px 0 0;
    margin-bottom: .5rem;
  }
  .member-card__img .img-hover {
    width: 151px;
  }
  .member-card__role,
  .member-card__name,
  .member-card__text,
  .member-card__career-label,
  .member-card__career-text {
    font-size: 24px;
  }
  .member-card__name {
    font-size: 24px;
  }
  .member-card__body {
    flex: 1;
    text-align: left;
  }

  /* 会社概要 */
  .company__table {
    font-size: 24px;
  }
  .company__table th {
    width: 80px;
    padding: .8rem 1rem .8rem 0;
  }
  .company__table td {
    padding: .8rem 0 .8rem 1rem;
  }

  /* 里海ページ */
  .project-title {
    font-size: 32px;
    line-height: 1.8;
    padding: 40px 0 60px;
  }
  .project-item__num-label {
    font-size: 12px;
  }
  .project-item__num-value {
    font-size: 36px;
  }
  .project-item__heading {
    font-size: 26px;
  }
  .project-item__text {
    font-size: 24px;
  }
  .project-item__header {
    gap: 1rem;
  }
  .project-item__divider {
    height: 26px;
  }
  .partners-table td {
    font-size: 24px;
  }
  .project-item {
    padding: 2.5rem 0;
  }
  .partners-table {
    width: 100%;
    font-size: 14px;
  }
  .partners-table th {
    width: 90px;
    padding: .8rem 1rem .8rem 0;
    font-size: 13px;
  }
  .partners-table td {
    padding: .8rem 0 .8rem 1.5rem;
    font-size: 13px;
  }
  .page-hero {
    margin: 0 auto;
    padding: 0 1rem;
  }

  /* ===== フッター SP ===== */
  .site-footer {
    padding: 2rem 0 0;
    font-size: 14px;
  }
  .site-footer__inner {
    flex-direction: column;
    align-items: center;
    gap: 0;
    padding-bottom: 0;
    width: min(100%, 100% - 50px);
  }
  .site-footer__logo-box {
    border: none;
    display: flex;
    justify-content: center;
    width: 100%;
    height: auto;
    margin-bottom: 2rem;
    margin-right: 0;
    margin-left: 0;
    padding: 0;
    min-height: unset;
  }
  .home .site-footer {
    padding: 9rem 0 0;
  }
  .site-footer__logo-box img {
    width: 220px;
  }

  .sato-umi-page .site-footer__logo-box {
    display: flex;
    justify-content: center;
    width: 100%;
  }
  .site-footer__nav {
    flex-direction: column;
    gap: 0;
    width: 100%;
    border-top: 1px solid var(--color-title);
  }
  .site-footer__nav-col ul {
    display: none;
    margin-top: 0;
    padding: .6rem 0 1rem 1.8rem;
  }
  .site-footer__nav-col.is-open ul {
    display: block;
  }
  .site-footer__nav-heading {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--color-title);
    padding: .9rem 0;
    cursor: pointer;
    user-select: none;
    font-size: 14px;
  }
  .site-footer__nav-heading::after {
    content: '+';
    color: var(--color-title);
    font-size: 22px;
    font-weight: 300;
    line-height: 1;
    flex-shrink: 0;
  }
  .site-footer__nav-col.is-open .site-footer__nav-heading::after {
    content: '\00D7';
  }
  .site-footer__nav-col.is-open .site-footer__nav-heading {
    border-bottom: none;
  }
  .site-footer__nav-col.is-open {
    border-bottom: none;
  }
  .site-footer__nav-col.is-open + .site-footer__nav-col {
    border-top: 1px solid var(--color-title);
  }
  .site-footer__nav-col ul li a::before {
    content: none;
  }
  .btn--contact-footer {
    align-self: center;
    width: 240px;
    font-size: 14px;
    padding: .7rem 0;
    margin: 2rem 0 3rem;
  }
  .site-footer__bottom {
    text-align: center;
    width: 100%;
    padding: 1rem 0;
  }
}

/* モバイルメニュー（JS連携）*/
.site-header.is-menu-open {
  position: fixed;
  inset: 0;
  height: 100dvh;
  z-index: 200;
  background: var(--color-bg);
}
.site-header.is-menu-open .site-header__inner {
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  padding-top: 7rem;
  gap: 2rem;
  height: 100%;
  position: relative;
}
.site-header.is-menu-open .site-header__logo {
  display: block;
  margin-left: 0;
}
.logo--menu { display: none; }
.site-header.is-menu-open .logo--default { display: none; }
.site-header.is-menu-open .logo--menu { display: block; }
.site-header.is-menu-open .site-header__logo { margin-bottom: 100px; }
.site-header.is-menu-open .logo--menu { width: 192px; }
.site-header.is-menu-open .btn--contact {
  width: 180px;
  height: 30px;
  font-size: 24px;
  padding: .6rem 0;
  border-radius: 999px;
  margin-top: 1rem;
}
@media (max-width: 600px) {
  .site-header.is-menu-open .site-header__logo { margin-bottom: 30px; }
  .site-header.is-menu-open .logo--menu { width: 96px; }
  .site-header.is-menu-open .site-nav__list { gap: 0.8rem; }
  .site-header.is-menu-open .btn--contact {
    width: 153px;
    font-size: 12px;
    margin-top: 1.5rem;
  }
}
.site-header.is-menu-open .site-nav {
  display: flex;
  flex-direction: column;
  align-items: center;
  position: static;
  background: transparent;
  padding: 0;
  border: none;
  box-shadow: none;
  z-index: auto;
  margin-left: 0;
  width: 100%;
}
.site-header.is-menu-open .site-nav__list {
  flex-direction: column;
  align-items: center;
  gap: 1.2rem;
}
.site-header.is-menu-open .site-nav__list li a {
  font-size: 24px;
  padding: 0;
  border: none;
  color: var(--color-text);
  text-decoration: none;
  letter-spacing: 0.02em;
}
@media (max-width: 600px) {
  .site-header.is-menu-open .site-nav__list li a {
    font-size: 12px;
  }
}
.site-header.is-menu-open .nav-arrow {
  display: none;
}
.site-header.is-menu-open .btn--contact {
  display: inline-flex;
  margin-right: 0;
}
.site-header.is-menu-open .hamburger {
  position: absolute;
  top: 1.2rem;
  right: 1.2rem;
  margin-left: 0;
}
.hamburger[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(9px) rotate(45deg);
}
.hamburger[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.hamburger[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-9px) rotate(-45deg);
}

/* ===== スマートフォン専用（ヒーロー位置など） ===== */
@media (max-width: 750px) {
  .hero__illust img {
    width: 100%;
  }
  .hero__copy {
    left: 10%;
    right: auto;
    top: 6%;
  }
  .hero__copy p {
    font-size: clamp(17px, 4.5vw, 34px);
    line-height: 2;
  }
  .pc-br { display: none; }
  .sp-br { display: block; }
}

/* ===== タブレット専用（600〜750px） ===== */
@media (min-width: 601px) and (max-width: 750px) {
  .container {
    padding-inline: 50px;
  }
  .sato-umi-page .logo-f--sato-umi {
    width: 318px;
    margin-bottom: -130px;
  }
  .sato-umi-page .container {
    padding-bottom: 6rem;
  }
  .site-footer__inner {
    width: 506px;
  }
  .activity-card__title {
    font-size: 26px !important;
    margin-top: 30px;
    margin-bottom: 30px;
  }
  .activity-card__img--large {
    width: 100%;
    height: auto;
  }
  .activity-card--tri {
    width: 100%;
  }
  .activity-card--tri .activity-card__img--tri {
    width: 100%;
    height: auto;
  }
  .activity-card--tri .activity-card__img--tri img {
    width: 100%;
    height: auto;
    object-fit: cover;
  }
  .activities__grid--small {
    gap: 44px;
  }
  .member-card__img {
    width: 100%;
    height: auto;
    aspect-ratio: 151 / 176;
    border-radius: 50% 50% 0 0 / 43% 43% 0 0;
  }
  .member-card__img .img-default,
  .member-card__img .img-hover {
    width: 100%;
    height: 100%;
    object-fit: cover;
  }
  .btn--activity {
    width: 360px;
    height: 50px;
    margin-bottom: 100px;
  }
  .site-footer__copy {
    font-size: 22px;
  }
  .partners-table th,
  .partners-table td {
    padding: 0.5rem;
    font-size: 24px;
  }
}

/* ===== スマートフォン専用（フォント1倍） ===== */
@media (max-width: 600px) {
  .site-header__logo img { width: 233px; }
  .site-footer__logo-box img { width: 110px; }
  .hero { padding-top: 5px; }
  .lead__text { font-size: 14px; margin-bottom: 1rem; line-height: 1.7; }
  .lead__sub { font-size: 12px; }
  .lead__sub-em { font-size: 14px; }
  .section-title { font-size: 15px; margin-bottom: 2rem; }
  .activity-card__title { font-size: 13px !important; margin-top: 15px; margin-bottom: 15px; line-height: 1.6; }
  .activity-card__body .btn--activity { margin-top: 20px; }
  .activity-card__img--large { width: 100%; height: auto; }
  .activity-card--tri { width: 100%; }
  .activity-card--tri .activity-card__img--tri,
  .activity-card--tri .activity-card__img--tri img { width: 100%; height: auto; }
  .activities__grid--small { gap: 35px 25px; }
  .btn--activity { width: 180px; height: 30px; margin-bottom: 50px; }
  .activity-card__text { font-size: 12px; }
  .btn--activity { font-size: 12px; }
  .news-card__body,
  .news-card__date,
  .news-card__title,
  .news-card__excerpt { font-size: 12px; }
  .section-more,
  .btn--more { font-size: 12px; }
  .btn--more { height: 30px; }
  .member-card__role,
  .member-card__name,
  .member-card__text,
  .member-card__career-label,
  .member-card__career-text { font-size: 12px; }
  .company__table { font-size: 12px; }
  .company__table th,
  .company__table td { padding: 0.5rem; }
  .company__table ol li { line-height: 1.7; gap: 0 0.1rem; }
  .project-title { font-size: 16px; }
  .sato-umi-page .logo-f--sato-umi { width: 159px !important; margin-bottom: -80px; top: -87px; }
  .sato-umi-page .container { padding-bottom: 6rem; }
  .news__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 25px;
  }
  .project-item__num-label { font-size: 6px; }
  .project-item__num-value { font-size: 18px; }
  .project-item__heading { font-size: 13px; }
  .project-item__text { font-size: 12px; }
  .partners-table td { font-size: 12px; }
  .site-footer__inner {
    width: 253px;
  }
  .member-card__col-img {
    flex-shrink: 0;
    flex-basis: auto;
  }
  .member-card__img {
    width: 151px;
    height: 176px;
    aspect-ratio: auto;
    border-radius: 76px 76px 0 0;
  }
  .member-card__img .img-default,
  .member-card__img .img-hover {
    width: 151px;
    height: auto;
    object-fit: unset;
  }
  .btn--contact-footer {
    width: 180px;
    font-size: 12px;
    padding: .3rem 0;
  }
  .site-footer__nav-heading {
    padding: .4rem 0;
    font-size: 12px;
  }
  .site-footer__nav-col ul li a {
    font-size: 12px;
  }
  .site-footer__copy {
    font-size: 11px;
  }
  .activities { padding: 2rem 0; }
  .activities__grid--large { gap: 0; }
  .activities__grid--small { margin-top: 0; }
  .news { padding: 2rem 0; }
  .members { padding: 2rem 0; }
  .members__grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  .company { padding: 2rem 0; }
  .sato-umi-page .news { padding: 2rem 0 !important; }
  .partners-section { padding: 2rem 0 !important; }
  .partners-table th,
  .partners-table td {
    padding: 0.3rem 0.5rem;
    font-size: 13px;
  }
  .partners-table tr:first-child th,
  .partners-table tr:first-child td {
    padding-top: 0;
  }
  .project-item {
    padding: 2rem 0;
  }
  .project-item:nth-of-type(2) .project-item__header {
    margin-bottom: 1.5rem;
  }
  .sato-umi-page .container {
    padding-bottom: 4rem;
  }
  .project-title {
    padding: 40px 0 0;
    line-height: 1.6;
  }
  .company__table tr:first-child th,
  .company__table tr:first-child td {
    padding-top: 0;
  }
}

/* ===== 投稿詳細ページ ===== */
.single-post {
  padding: 0 0 8rem;
}
.single-post__inner {
  max-width: 760px;
  margin-inline: auto;
}
.single-post__header {
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 3rem;
}
.single-post__date {
  font-size: 14px;
  color: var(--color-text);
  opacity: 0.7;
  display: block;
  margin-bottom: 0.8rem;
}
.single-post__title {
  font-size: 26px;
  line-height: 1.7;
  color: var(--color-title);
  font-family: var(--font-main);
  font-weight: var(--fw-medium);
  margin: 0;
}
.single-post__thumb {
  margin-bottom: 3rem;
}
.single-post__thumb img {
  width: 100%;
  height: auto;
  display: block;
}
.single-post__body {
  line-height: 2;
  font-size: 16px;
  color: var(--color-text);
}
.single-post__body p {
  margin-bottom: 1.8em;
}
.single-post__body img {
  max-width: 100%;
  height: auto;
  border-radius: 6px;
  margin: 1rem 0;
}
.single-post__body h2 {
  font-size: 22px;
  margin: 3em 0 1em;
  padding-bottom: 0.5em;
  border-bottom: 2px solid var(--color-accent-light);
  color: var(--color-title);
  font-family: var(--font-main);
  font-weight: var(--fw-medium);
}
.single-post__body h3 {
  font-size: 18px;
  margin: 2em 0 0.8em;
  padding-left: 0.8em;
  border-left: 3px solid var(--color-accent);
  color: var(--color-title);
  font-family: var(--font-main);
  font-weight: var(--fw-medium);
}
.single-post__nav {
  margin-top: 5rem;
  padding-top: 3rem;
  border-top: 1px solid var(--color-border);
  text-align: center;
}

@media (max-width: 750px) {
  .single-post { padding: 3rem 0 6rem; }
  .single-post__title { font-size: 20px; }
  .single-post__body { font-size: 14px; }
  .single-post__body h2 { font-size: 18px; }
  .single-post__body h3 { font-size: 15px; }
}
@media (max-width: 600px) {
  .single-post { padding: 2rem 0 4rem; }
  .single-post__title { font-size: 15px; }
  .single-post__body { font-size: 12px; }
  .single-post__body h2 { font-size: 14px; }
  .single-post__body h3 { font-size: 13px; }
  .hero__copy { top: 4%; }
}