/* リセットCSS */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #FF6B35; /* オレンジ */
    --secondary-color: #FF9F1C; /* ライトオレンジ */
    --text-color: #2D3142; /* ダークグレー */
    --light-gray: #F7F7F7; /* ライトグレー */
    --white: #FFFFFF;
    --border-color: #E5E5E5;
    --gradient-primary: linear-gradient(135deg, #FF6B35 0%, #FF9F1C 100%);
    --gradient-overlay: linear-gradient(135deg, rgba(255, 107, 53, 0.9) 0%, rgba(255, 159, 28, 0.9) 100%);
}

body, h1, h2, h3, h4, h5, h6, p, .hero-title, .hero-subcatch, .jp-bold, .en-bold, .element-title, .element-en, .element-desc, .overlap-card, .overlap-info, .card-hint, .card-description, .mandara-intro-text, .intro-fade, .intro-message-block, .cta-section, .closing-message, .elements-phrase-section, .elements-phrase-grid, .element-phrase {
    font-family: 'Zen Maru Gothic', 'Noto Sans JP', 'Helvetica Neue', Arial, sans-serif !important;
}

body {
    margin: 0; /* bodyのデフォルトマージンを削除 */
    line-height: 1.6;
    color: #333;
    background-color: #fff;
    font-size: 1.2rem;
    height: 100%;
    overflow-x: hidden; /* 横スクロールバーを防止 */
    font-weight: 400;
}

/* 共通スタイル */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.section {
    padding: 100px 0;
    position: relative;
    overflow: hidden;
    background-color: #fff;
}

.section:nth-child(even) {
    background-color: #fff;
}

.section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-overlay);
    opacity: 0;
    transition: opacity 0.5s ease;
    z-index: 1;
}

.section:hover::before {
    opacity: 0.05;
}

h2 {
    font-size: 2.5rem;
    margin-bottom: 40px;
    text-align: center;
    font-weight: 700;
    position: relative;
    z-index: 2;
}

h2::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: var(--gradient-primary);
    margin: 20px auto 0;
    border-radius: 2px;
    transition: width 0.3s ease;
}

.section:hover h2::after {
    width: 100px;
}

.section .content,
.section .content p,
.section .content ul,
.section .content li {
    font-size: 1.2rem;
}

.section .content p {
    margin-top: 1.5em;
    margin-bottom: 1.5em;
}

.section .content p.center-align {
    text-align: center;
}

/* ヘッダー横並び1段レイアウト */
.header {
  width: 100%;
  background: #fff;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
  z-index: 1000;
  position: relative;
  padding: 8px 0;
}
.header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  max-width: 100%;
  padding: 0 40px;
  margin: 0 auto;
  box-sizing: border-box;
}
.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: inherit;
  transition: opacity 0.2s;
}
.logo:hover {
  opacity: 0.8;
  text-decoration: none;
  color: inherit;
}
.logo-img {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: #e0f0f4;
  object-fit: cover;
}
.logo h1 {
  display: none;
}
.logo-text {
  display: flex;
  flex-direction: column;
  justify-content: center;
  line-height: 1.2;
}
.logo-text-top {
  font-size: 0.7rem;
  font-weight: 500;
  color: #333;
}
.logo-text-bottom {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-color);
  letter-spacing: 0.03em;
}
.nav {
  display: flex;
  align-items: center;
}
.nav ul {
  display: flex;
  list-style: none;
  gap: 22px;
  margin: 0;
  padding: 0;
}
.nav ul li a {
  text-decoration: none;
  color: var(--text-color);
  font-weight: 500;
  transition: all 0.3s;
  position: relative;
  padding: 5px 0;
  white-space: nowrap;
  font-size: 1rem;
}
.nav ul li a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: width 0.3s;
}
.nav ul li a:hover::after {
  width: 100%;
}

/* ハンバーガーメニュー */
.hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: none;
    border: none;
    cursor: pointer;
    z-index: 1100;
}
.hamburger span {
    display: block;
    width: 28px;
    height: 4px;
    margin: 4px auto;
    background: var(--primary-color);
    border-radius: 2px;
    transition: all 0.3s;
}

/* ヒーローセクション */
.hero,
.banner-section {
    padding-left: 0;
    padding-right: 0;
    width: 100vw;
    position: relative;
    left: 50%;
    transform: translateX(-50%);
}
.hero {
    position: relative;
    height: 100vh;
    min-height: 400px;
    background: url('images/slider1.jpg') center center/cover no-repeat;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: #fff;
    overflow: hidden;
}

.hero-bg, .hero-bg-next {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    z-index: 1;
    opacity: 1;
    transition: opacity 1.2s;
}
.hero-bg-next {
    z-index: 2;
    opacity: 0;
    pointer-events: none;
}

.hero-overlay {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background: linear-gradient(rgba(0,0,0,0.18), rgba(0,0,0,0.18));
    z-index: 3;
    pointer-events: none;
}
.hero-content {
    position: relative;
    z-index: 4;
    width: 100%;
    height: 100vh;
    min-height: 400px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.hero-catch-img {
    display: block;
    margin: 0 auto 1.5rem auto;
    max-width: 99vw;
    width: 1200px;
    min-width: 220px;
    height: auto;
    z-index: 10;
    pointer-events: none;
    filter: drop-shadow(0 4px 24px rgba(0,0,0,0.18));
    opacity: 0;
    animation: fadeInIkigaiCatch 2s ease 0.2s forwards;
}

@keyframes fadeInIkigaiCatch {
    from { opacity: 0; }
    to   { opacity: 1; }
}

.hero-subcatch {
    text-align: center;
    font-size: 1.7rem;
    font-weight: 500;
    color: #fff;
    text-shadow: 0 2px 12px rgba(0,0,0,0.25), 0 0 2px #fff;
    line-height: 1.6;
    letter-spacing: 0.01em;
    z-index: 20;
    pointer-events: none;
    opacity: 0;
    animation: fadeInIkigaiSub 1.2s ease 1.1s forwards;
    margin-top: -3em;
}

@keyframes fadeInIkigaiSub {
    from { opacity: 0; transform: translateY(20px);}
    to   { opacity: 1; transform: translateY(0);}
}

/* CTAボタン */
.cta-button {
    display: inline-block;
    padding: 15px 40px;
    background: var(--gradient-primary);
    color: var(--white);
    text-decoration: none;
    border-radius: 30px;
    font-weight: 700;
    transition: all 0.3s;
    box-shadow: 0 4px 15px rgba(255, 107, 53, 0.3);
    position: relative;
    overflow: hidden;
    z-index: 1;
    min-width: 120px;
    min-height: 44px;
    font-size: 1rem;
    padding: 14px 24px;
}

.cta-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity 0.3s;
    z-index: -1;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 107, 53, 0.4);
}

.cta-button:hover::before {
    opacity: 1;
}

.center-button {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 18px;
    margin-top: 2em;
    margin-bottom: 2em;
}

/* 活動アイコン */
.banner-section {
    background: linear-gradient(90deg, #FF6B35 0%, #FF9F1C 100%);
    padding-top: 80px;
    padding-bottom: 80px;
}
.banner-section h2 {
    color: #fff;
}
.activities-icons {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin-top: 40px;
    width: 100%;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
}
.activity-item {
    background: #fff;
    border-radius: 24px;
    box-shadow: 0 0 0 4px rgba(255, 159, 28, 0.25);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.4s cubic-bezier(.4,2,.6,1);
    cursor: pointer;
    position: relative;
    z-index: 1;
    width: auto;
    height: auto;
    margin: 0;
}
.activity-item:hover,
.activity-item:focus {
    transform: scale(1.12) translateY(-18px);
    z-index: 2;
    box-shadow: 0 24px 48px 0 rgba(255, 159, 28, 0.35), 0 0 0 8px rgba(255, 159, 28, 0.18);
    background: #fff;
}
.activity-item img {
    max-width: 160px;
    max-height: 160px;
    width: 100%;
    height: auto;
    margin: 0;
    pointer-events: none;
}

/* メッセージボックス */
.message-box {
    text-align: center;
    margin-bottom: 60px;
}

.message-box .lead {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 30px;
    line-height: 1.6;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.message-box p {
    font-size: 1.2rem;
    margin-bottom: 20px;
    line-height: 2;
}

.message-box .call-to-action {
    font-size: 1.4rem;
    font-weight: 700;
    margin-top: 40px;
    color: var(--primary-color);
    animation: pulse 2s infinite;
}

/* 特典情報 */
.benefits-info {
    background-color: #FFF9F3;
    border: 2px solid var(--secondary-color);
    border-radius: 12px;
    padding: 25px;
    margin: 30px auto;
    max-width: 800px;
    text-align: left;
}

.benefits-info p {
    margin-bottom: 1em;
    font-size: 1.1rem;
    line-height: 1.7;
}

.benefits-info ul {
    list-style: none;
    padding-left: 0;
    margin-bottom: 1em;
}

.benefits-info ul li {
    font-size: 1.1rem;
    line-height: 1.7;
    margin-bottom: 0.5em;
    padding-left: 1.8em;
    position: relative;
}

.benefits-info ul li::before {
    content: none;
    position: absolute;
    left: 0;
    top: 0;
    font-size: 1.2em;
}

.benefits-info .note {
    font-size: 0.95rem;
    color: var(--text-color);
    opacity: 0.8;
    text-align: center;
    margin-top: 1.5em;
}

/* アバウトセクション */
.about-organization-container {
    position: relative;
    max-width: 1000px;
    margin: 0 auto;
    min-height: 400px;
}
.about-mascot-bg {
    position: absolute;
    right: 0;
    bottom: 0;
    height: 300px;
    max-width: 400px;
    width: auto;
    z-index: 1;
    pointer-events: none;
    filter: drop-shadow(0 4px 16px rgba(0,0,0,0.08));
    opacity: 0.92;
    box-sizing: border-box;
}

.about-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 40px;
    width: 100%;
    white-space: normal;
}
.about-flex {
    position: relative;
    z-index: 2;
    display: flex;
    justify-content: flex-start;
    padding-bottom: 0;
}
.about-flex .content {
    max-width: 700px;
    margin: 0;
    text-align: left;
    z-index: 2;
    background: transparent;
}

.activity-large-title {
    font-size: 2.4rem;
    font-weight: 800;
    letter-spacing: 0.04em;
}

.ikigai-lead {
    text-align: center;
    font-size: 2.4rem;
    font-weight: 800;
    margin-bottom: 2em;
    background: linear-gradient(90deg, #FF6B35 0%, #FF9F1C 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    color: transparent;
    letter-spacing: 0.03em;
}

/* IKIGAIとはセクション */
#about-ikigai {
    position: relative;
    min-height: 400px;
    overflow: hidden;
    padding: 80px 0;
    margin-top: 60px;
}
#about-ikigai::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: url('images/ikigai-mandara-bg.png') no-repeat center center;
    background-size: contain;
    opacity: 0;
    z-index: 0;
    pointer-events: none;
    transition: opacity 2.5s ease;
}
#about-ikigai.show-bg::before {
    opacity: 0.15; /* じんわり表示 */
}
#about-ikigai > .container {
    position: relative;
    z-index: 1; /* 背景の上に表示 */
}
#about-ikigai .content {
    text-align: center;
}

#about.section {
    background: linear-gradient(90deg, #FF6B35 0%, #FF9F1C 100%);
    padding-left: 0;
    padding-right: 0;
}

#about .content {
    background: #fff;
    border-radius: 24px;
    box-shadow: 0 8px 32px 0 rgba(255, 159, 28, 0.18), 0 0 0 2px #fff6f0;
    padding: 48px 32px 40px 32px;
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
    z-index: 2;
}

/* フッター */
.footer {
    background: #F7F7F7;
    padding: 48px 0 16px 0;
    margin-top: 64px;
    font-size: 1rem;
    color: #2D3142;
    padding-top: 2rem;
}
.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    max-width: 1200px;
    margin: 0 auto 12px auto;
    padding: 0 20px;
    gap: 20px;
}
.company-info h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 8px;
}
.company-info p {
    font-size: 0.9rem;
    color: #666;
    margin: 0;
}
.footer-navigation {
    display: flex;
    align-items: center;
    gap: 30px;
    flex-wrap: wrap;
}
.footer-links {
    display: flex;
    gap: 24px;
    align-items: center;
}
.footer-links a {
    color: #FF6B35;
    text-decoration: none;
    font-size: 1rem;
    font-weight: 500;
    position: relative;
    transition: color 0.2s;
}
.footer-links a:hover {
    color: #FF9F1C;
}
.footer-sns {
    display: flex;
    gap: 18px;
    align-items: center;
    margin-left: auto;
}
.sns-icon {
    width: 28px;
    height: 28px;
    transition: transform 0.2s, opacity 0.2s;
}
.sns-icon:hover {
    opacity: 0.7;
    transform: scale(1.1);
}
.copyright {
    text-align: center;
    font-size: 0.95rem;
    color: #888;
    margin-top: 12px;
}

/* お問い合わせCTAセクション */
.contact-cta-section-new {
    background: #fffaf6;
    padding: 80px 24px;
    text-align: center;
    border-radius: 24px;
    max-width: 1000px;
    margin: 64px auto 0 auto;
}
.contact-cta-inner {
    max-width: 680px;
    margin: 0 auto;
}
.contact-cta-text {
    color: #4b5563;
    font-size: 1.2rem;
    line-height: 1.8;
    text-align: center;
    margin-bottom: 1.5rem;
}
.contact-cta-btn {
    display: inline-block;
    background: linear-gradient(90deg, #f97316 0%, #fb923c 100%);
    color: #fff;
    font-size: 1.1rem;
    font-weight: 600;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 9999px;
    box-shadow: 0 2px 8px rgba(249,115,22,0.10);
    text-decoration: none;
    transition: background 0.2s, box-shadow 0.2s;
    margin-top: 1.5rem;
}
.contact-cta-btn:hover {
    transform: translateY(-2px);
    background-color: var(--primary-color-dark);
}

.mobile-only {
    display: none !important;
}

.desktop-only {
    display: initial !important;
}

/* アニメーション */
@keyframes pulse {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
    100% {
        transform: scale(1);
    }
}

/* レスポンシブ対応 */
@media (max-width: 900px) {
    .header {
        padding: 8px 0;
    }
    .header .container {
        padding: 0 16px;
    }
    .logo-img {
        width: 40px;
        height: 40px;
    }
    .logo h1 {
        font-size: 0.9rem;
    }
    .nav ul {
        gap: 16px;
    }
    .container {
        padding: 0 8px;
    }
    .section {
        padding: 40px 0;
    }
    h2 {
        font-size: 1.4rem;
        margin-bottom: 20px;
    }
    .about-title {
        font-size: 1.2rem;
    }
    .ikigai-lead {
        font-size: 1.1rem;
    }
    .activities-icons {
        gap: 16px;
        max-width: 100vw;
    }
    .activity-item {
        max-width: 120px;
    }
    #about-ikigai {
        min-height: 320px;
    }
    #about-ikigai::before {
        background-size: cover;
    }
    .about-mascot-bg {
        position: static;
        display: block;
        margin: 24px auto 0 auto;
        height: 100px;
        max-width: 60vw;
        width: auto;
        opacity: 1;
    }
    .about-organization-container {
        min-height: 320px;
    }
    .about-flex {
        padding-bottom: 0;
    }
}

@media (max-width: 700px) {
    html {
        font-size: 10px;
    }
    .header {
        padding: 0;
        backdrop-filter: none;
    }
    .header .container {
        flex-direction: row;
        align-items: center;
        padding: 0 2vw;
    }
    .logo-img {
        width: 32px;
        height: 32px;
    }
    .logo h1 {
        font-size: 0.85rem;
    }
    .nav ul {
        gap: 6px;
    }
    .hamburger {
        display: flex;
    }
    .nav {
        position: fixed;
        top: 60px;
        left: 50%;
        transform: translate(-50%, -30px) scaleY(0);
        width: 95vw;
        max-width: 480px;
        height: auto;
        background: #fff;
        border-radius: 18px;
        box-shadow: 0 8px 32px rgba(0,0,0,0.12);
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        transition: transform 0.3s cubic-bezier(.4,2,.6,1), opacity 0.3s;
        opacity: 0;
        z-index: 1050;
        padding: 24px 0 18px 0;
        overflow: hidden;
    }
    .nav.open {
        transform: translate(-50%, 0) scaleY(1);
        opacity: 1;
    }
    .nav ul {
        flex-direction: column;
        text-align: center;
        margin: 0;
        padding: 0;
        width: 100%;
    }
    .nav ul li {
        margin: 12px 0;
        width: 100%;
    }
    .nav ul li a {
        font-size: 1.1rem;
        color: var(--text-color);
        font-weight: 700;
        padding: 12px 24px;
        border-radius: 8px;
        transition: background 0.2s;
        display: block;
        width: 100%;
        box-sizing: border-box;
    }
    .nav ul li a:hover {
        background: var(--light-gray);
    }
    .header .container {
        flex-direction: row;
        height: 60px;
        padding: 10px 16px;
    }
    .nav:not(.open) {
        pointer-events: none;
        visibility: hidden;
    }
    .hero {
        height: 60vw;
        min-height: 180px;
        background-size: cover;
    }
    .hero-catch-img {
        max-width: 100vw;
        width: 99vw;
        min-width: 120px;
    }
    .hero-subcatch {
        font-size: 1.5rem;
        line-height: 1.7;
        max-width: 95vw;
        margin-top: -2em;
    }
    .hero-content {
        height: 60vw;
        min-height: 180px;
    }
    .container {
        padding: 0 4vw;
    }
    .section {
        padding: 24px 0;
    }
    h2 {
        font-size: 1.8rem;
        margin-bottom: 14px;
    }
    .about-title {
        font-size: 1.6rem;
    }
    .ikigai-lead {
        font-size: 1.2rem;
    }
    .about-flex {
        flex-direction: column !important;
        align-items: flex-start !important;
    }
    .activities-icons {
        flex-direction: row !important;
        justify-content: space-between !important;
        gap: 2vw !important;
        align-items: flex-end !important;
    }
    .activity-item {
        max-width: 17vw !important;
        min-width: 50px !important;
        aspect-ratio: 1/1 !important;
        background: transparent !important;
        box-shadow: none !important;
        border-radius: 0 !important;
        display: flex !important;
        align-items: center !important;
        justify-content: center !important;
        padding: 0 !important;
    }
    .activity-item img {
        max-width: 100% !important;
        max-height: 14vw !important;
        min-width: 32px !important;
        min-height: 32px !important;
        object-fit: contain !important;
        background: none !important;
        border-radius: 0 !important;
        box-shadow: none !important;
        display: block !important;
        margin: 0 auto !important;
    }
    .about-mascot-bg {
        position: static !important;
        display: block !important;
        margin: 18px auto 0 auto !important;
        height: 90px !important;
        max-width: 120px !important;
        width: auto !important;
        opacity: 1 !important;
    }
    .about-organization-container {
        min-height: unset !important;
    }
    .footer-content {
        flex-direction: column;
        align-items: flex-start;
        gap: 18px;
        padding: 0 8px;
    }
    .footer-links {
        gap: 14px;
        flex-wrap: wrap;
    }
    .company-info h3 {
        font-size: 1rem;
    }
    .cta-button {
        padding: 12px 20px;
        font-size: 1.1rem;
    }
    .section .content p,
    .section .content li {
        font-size: 1.1rem;
        line-height: 1.8;
    }
    .benefits-info {
        padding: 12px;
        font-size: 1rem;
    }
    .benefits-info p,
    .benefits-info ul li {
        font-size: 1rem;
    }

    .benefits-list {
        padding-left: 0;
        text-align: center;
    }
    .benefits-list li {
        display: inline-block;
        text-align: center;
    }

    .contact-cta-section-new {
        padding: 32px 10px 24px 10px;
        max-width: 95vw;
    }
    .contact-cta-text {
        font-size: 1.2rem;
        line-height: 1.7;
    }
    .contact-cta-btn {
        font-size: 1.1rem;
        padding: 0.9rem 1.3rem;
    }

    .mobile-only {
        display: initial !important;
    }

    .desktop-only {
        display: none !important;
    }
}

@media (max-width: 500px) {
    .activities-icons {
        flex-direction: column;
        gap: 12px;
    }
    .activity-item {
        max-width: 90vw;
    }
}

@media (max-width: 768px) {
    .footer-content {
        flex-direction: column;
        align-items: center;
        gap: 24px;
        text-align: center;
    }
    .footer-navigation {
        flex-direction: column;
        gap: 20px;
    }
    .footer-links {
        flex-direction: column;
        gap: 14px;
        order: 2;
    }
    .footer-sns {
        order: 1;
        justify-content: center;
        width: 100%;
        margin-left: 0;
    }
    .br.mobile-only {
        display: block;
    }
    .mobile-only {
        display: inline;
    }
    .desktop-only {
        display: none;
    }
    .mobile-block {
        display: block;
    }
}

.ikigai-center-textonly p {
    font-size: 0.7rem;
}

/* -----------------------------------
 * activity.html
 * ----------------------------------- */
.page-hero {
  background-color: #fff;
  padding: 3rem 24px;
  text-align: center;
  border-bottom: 1px solid #eee;
}
.page-hero h1 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 0.5em;
}
.page-hero p {
  font-size: 1.1rem;
  color: #555;
  line-height: 1.8;
}

.activity-section {
  padding: 4rem 24px;
  background-color: #f8f9fa;
}

.activity-list {
  display: flex;
  flex-direction: column;
  gap: 5rem;
  max-width: 900px;
  margin: 0 auto;
}

.activity-post {
  background-color: #fff;
  border-radius: 18px;
  box-shadow: 0 4px 24px rgba(0,0,0,0.08);
  padding: 2.5rem;
  text-align: center;
}
.activity-post-img {
  width: 100%;
  height: auto;
  display: block;
  margin: 0 auto 2.5rem auto;
  border-radius: 12px;
}
.activity-post-date {
  font-size: 0.95rem;
  color: #888;
  margin-bottom: 1rem;
}
.activity-post-title {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 1.5rem;
  color: #222;
  line-height: 1.4;
}
.activity-post-body {
  font-size: 1rem;
  color: #333;
  line-height: 2;
  max-width: 700px;
  margin: 0 auto;
}
.activity-post-body p {
  margin-bottom: 1.5em;
}
.activity-post-body p:last-child {
  margin-bottom: 0;
}

.activity-placeholder-section {
    padding: 4rem 24px;
}

@media (max-width: 768px) {
  .page-hero {
    padding: 2.5rem 16px;
  }
  .page-hero h1 {
    font-size: 1.8rem;
  }
  .page-hero p {
    font-size: 1rem;
  }
  .activity-section {
    padding: 2.5rem 16px;
  }
  .activity-list {
    gap: 3rem;
  }
  .activity-post {
    padding: 1.5rem;
  }
  .activity-post-title {
    font-size: 1.5rem; /* スマホ用にタイトルサイズを調整 */
  }
  .activity-post-body {
    font-size: 1rem;
  }
}

/* -----------------------------------
 * about.html
 * ----------------------------------- */
.about-section {
  padding: 4rem 24px;
}
.about-section:nth-child(even) {
  background-color: #f8f9fa;
}
.about-title {
  font-size: 2.2rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 2.5rem;
}
.about-body {
  max-width: 720px;
  margin: 0 auto;
  font-size: 1.1rem;
  line-height: 2;
  text-align: center;
}
.about-body p {
  margin-bottom: 1.5em;
}
.about-body p:last-child {
  margin-bottom: 0;
}

/* Message Section */
.message-block {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
}
.message-img {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  object-fit: cover;
  margin-bottom: 2rem;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}
.message-signature {
  position: relative;
  z-index: 1;
  margin-top: 2.5rem;
  font-size: 1.1rem;
  line-height: 1.8;
  text-align: right;
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
}

.message-signature::before {
    content: '';
    position: absolute;
    top: 50%;
    right: 20px;
    transform: translateY(-50%);
    width: 200px;
    height: 200px;
    background-image: url('images/kaou.png');
    background-repeat: no-repeat;
    background-position: center;
    background-size: contain;
    opacity: 0.1;
    z-index: -1;
}

.message-signature p {
  margin-bottom: 0.5em;
}
.message-signature p:last-child {
  margin-bottom: 0;
  font-weight: 600;
}

/* Mascot Section */
.about-mascot-block {
  max-width: 600px;
  margin: 0 auto;
  padding: 2.5rem;
  background-color: #fff;
  border-radius: 16px;
  text-align: center;
  border: 1px solid #eee;
}
.about-mascot-img {
  width: 140px;
  height: auto;
  margin-bottom: 1.5rem;
}
.about-mascot-label {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}
.about-mascot-desc {
  font-size: 1rem;
  color: #555;
  line-height: 1.8;
  margin-bottom: 1.5rem;
}
.about-mascot-copyright {
  font-size: 0.85rem;
  color: #aaa;
}

/* Profile Table */
.profile-table {
  width: 100%;
  max-width: 800px;
  margin: 0 auto;
  border-collapse: collapse;
  background-color: #fff;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}
.profile-table th,
.profile-table td {
  padding: 1.25rem 1.5rem;
  text-align: left;
  border-bottom: 1px solid #eee;
}
.profile-table th {
  width: 30%;
  background-color: #f8f9fa;
  font-weight: 600;
}
.profile-table tr:last-child th,
.profile-table tr:last-child td {
  border-bottom: none;
}
.profile-activities {
  list-style-type: none;
  padding-left: 0;
  margin: 0;
}
.profile-activities li {
  margin-bottom: 0.5em;
}
.profile-activities li:last-child {
  margin-bottom: 0;
}

/* Responsive */
@media (max-width: 768px) {
  .about-section {
    padding: 2.5rem 16px;
  }
  .about-title {
    font-size: 1.8rem;
    margin-bottom: 2rem;
  }
  .about-body {
    font-size: 1rem;
  }
  .profile-table th,
  .profile-table td {
    display: block;
    width: 100%;
    box-sizing: border-box;
  }
  .profile-table th {
    border-bottom: none;
    padding-bottom: 0.5rem;
  }
  .profile-table td {
    padding-top: 0;
  }
  .message-img {
    width: 150px;
    height: 150px;
  }
  .message-signature {
    font-size: 1rem;
    text-align: center;
    margin-top: 2rem;
  }

  .message-signature::before {
    width: 120px;
    height: 120px;
    left: 50%;
    right: auto;
    transform: translateX(-50%);
    top: -40px;
  }
}

/* --- 団体の活動紹介（about-activity-group） --- */
.about-activity-group {
  padding: 64px 0 48px 0;
  background: #fffaf6;
}
.about-activity-group h2 {
  text-align: center;
  font-size: 2.2rem;
  font-weight: 700;
  margin-bottom: 2.5rem;
}
.activity-grid {
  display: flex;
  gap: 32px;
  justify-content: center;
  align-items: stretch;
  flex-wrap: wrap;
}
.activity-card {
  background: #fff;
  border-radius: 16px;
  box-shadow: 0 4px 18px rgba(255, 159, 28, 0.08);
  padding: 32px 24px 28px 24px;
  flex: 1 1 280px;
  max-width: 340px;
  min-width: 220px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  margin-bottom: 0;
  transition: box-shadow 0.2s, transform 0.2s;
}
.activity-card img {
  width: 110px;
  height: 110px;
  object-fit: contain;
  margin-bottom: 20px;
  border-radius: 8px;
  background: #f7f7f7;
  box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}
.activity-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 1em;
  color: #FF6B35;
}
.activity-card p {
  font-size: 1.05rem;
  color: #333;
  margin-bottom: 1.5em;
  flex: 1 0 auto;
}
.activity-card .button {
  display: inline-block;
  background: linear-gradient(90deg, #FF6B35 0%, #FF9F1C 100%);
  color: #fff;
  font-weight: 700;
  font-size: 1.05rem;
  padding: 12px 32px;
  border-radius: 32px;
  text-decoration: none;
  box-shadow: 0 4px 18px rgba(255, 107, 53, 0.13);
  transition: transform 0.18s, box-shadow 0.18s, background 0.18s;
  margin-top: 8px;
}
.activity-card .button:hover {
  transform: translateY(-2px) scale(1.04);
  box-shadow: 0 8px 32px rgba(255, 159, 28, 0.18);
  background: linear-gradient(90deg, #FF9F1C 0%, #FF6B35 100%);
  color: #fff;
}
@media (max-width: 900px) {
  .activity-grid {
    gap: 18px;
  }
  .activity-card {
    max-width: 100%;
    padding: 28px 12px 24px 12px;
  }
}
@media (max-width: 700px) {
  .activity-grid {
    flex-direction: column;
    gap: 28px;
    align-items: stretch;
  }
  .activity-card {
    max-width: 100vw;
    margin: 0 auto;
  }
}

/* 3つの重なりゾーン用スタイル */
.overlap3-section {
  position: relative;
}
.overlap3-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--gradient-overlay);
  opacity: 0;
  transition: opacity 0.5s ease;
  z-index: 1;
}
.section:hover::before {
  opacity: 0.05;
}

/* -----------------------------------
 * consortium.html
 * ----------------------------------- */
.consortium-page {
  background-color: #fdfaf7;
}

.consortium-hero {
  padding: 4rem 24px;
  text-align: center;
  background-color: #fff;
  border-bottom: 1px solid #eee;
}

.consortium-main-title {
  font-size: 2.5rem;
  font-weight: 700;
  color: #222;
}

.consortium-section {
  padding: 4rem 24px;
  text-align: center;
}

.consortium-section:not(:last-child) {
    border-bottom: 1px solid #f3e7e0;
}

.consortium-title {
  font-size: 2rem;
  font-weight: 700;
  color: #FF6B35;
  margin-bottom: 2rem;
}

.consortium-body {
  font-size: 1rem;
  line-height: 2;
  color: #333;
  max-width: 720px;
  margin: 0 auto;
  white-space: pre-line;
}

.consortium-activities .activity-list {
  list-style: none;
  padding-left: 0;
  display: inline-block;
  text-align: left;
  margin-bottom: 2rem;
}

.consortium-activities .activity-summary {
  font-weight: 500;
}

.consortium-list-section .coming-soon {
  color: #888;
}

.consortium-cta .consortium-body {
  margin-bottom: 2.5rem;
}

.form-container {
  max-width: 800px;
  margin: 0 auto;
}

@media (max-width: 768px) {
  .consortium-hero {
    padding: 2.5rem 16px;
  }
  .consortium-main-title {
    font-size: 1.8rem;
  }
  .consortium-section {
    padding: 2.5rem 16px;
  }
  .consortium-title {
    font-size: 1.5rem;
  }
  .consortium-body {
    font-size: 1rem;
    line-height: 2;
  }
}

.whitepaper-float-banner {
    position: fixed;
    right: 32px;
    bottom: 32px;
    width: 320px;
    z-index: 9999;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.6s cubic-bezier(0.4,0,0.2,1);
}
.whitepaper-float-banner.visible {
    opacity: 1;
    pointer-events: auto;
}