/* =============================================
   陰陽祭 LP - style.css
   Premium Design with 和 (Wa) Aesthetic
   ============================================= */

/* === Reset & Base === */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: "Noto Sans JP", "游ゴシック", "Yu Gothic", sans-serif;
    font-weight: 400;
    letter-spacing: 0.05em;
    line-height: 2.2;
    color: #333333;
    background-color: #f8f6f0;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

/* === Animation === */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Stagger children animations */
.fade-in:nth-child(2) {
    transition-delay: 0.1s;
}

.fade-in:nth-child(3) {
    transition-delay: 0.2s;
}

.fade-in:nth-child(4) {
    transition-delay: 0.3s;
}

.fade-in:nth-child(5) {
    transition-delay: 0.4s;
}

/* =============================================
   SECTION 1: ヒーローセクション
   ============================================= */
.hero {
    position: relative;
    width: 100%;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background-image: url('hero.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    padding: 120px 20px;
    overflow: hidden;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg,
            rgba(0, 0, 0, 0.6) 0%,
            rgba(0, 0, 0, 0.4) 40%,
            rgba(0, 0, 0, 0.5) 70%,
            rgba(0, 0, 0, 0.7) 100%);
    z-index: 1;
}

/* 陰陽モチーフ装飾 */
.hero-yinyang-decoration {
    position: absolute;
    z-index: 1;
    width: 300px;
    height: 300px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation: yinyang-rotate 60s linear infinite;
    pointer-events: none;
}

@keyframes yinyang-rotate {
    from {
        transform: translate(-50%, -50%) rotate(0deg);
    }

    to {
        transform: translate(-50%, -50%) rotate(360deg);
    }
}

/* 浮遊する粒子 */
.hero-particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    pointer-events: none;
}

.particle {
    position: absolute;
    width: 3px;
    height: 3px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    animation: particle-float 15s ease-in-out infinite;
}

.p1 {
    left: 15%;
    top: 20%;
    animation-delay: 0s;
    animation-duration: 18s;
}

.p2 {
    left: 75%;
    top: 30%;
    animation-delay: -3s;
    animation-duration: 22s;
}

.p3 {
    left: 40%;
    top: 70%;
    animation-delay: -7s;
    animation-duration: 16s;
}

.p4 {
    left: 85%;
    top: 60%;
    animation-delay: -10s;
    animation-duration: 20s;
}

.p5 {
    left: 25%;
    top: 80%;
    animation-delay: -5s;
    animation-duration: 24s;
}

@keyframes particle-float {

    0%,
    100% {
        transform: translateY(0) translateX(0);
        opacity: 0;
    }

    10% {
        opacity: 0.6;
    }

    50% {
        transform: translateY(-80px) translateX(20px);
        opacity: 0.3;
    }

    90% {
        opacity: 0.5;
    }
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
}

.pre-title {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.8);
    letter-spacing: 0.3em;
    font-family: "Noto Serif JP", serif;
    font-weight: 400;
}

.hero-spacer-60 {
    height: 60px;
}

.main-title {
    font-size: 72px;
    color: #ffffff;
    letter-spacing: 0.5em;
    font-weight: 700;
    font-family: "Noto Serif JP", serif;
    text-indent: 0.5em;
    text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
    position: relative;
}

.sub-title {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.7);
    letter-spacing: 0.3em;
    margin-top: 10px;
    font-family: "Noto Serif JP", serif;
}

.hero-spacer-40 {
    height: 40px;
}

.title-caption {
    font-size: 20px;
    color: #ffffff;
    letter-spacing: 0.25em;
    font-family: "Noto Serif JP", serif;
}

/* スクロールヒント */
.scroll-hint {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
}

.scroll-line {
    display: block;
    width: 1px;
    height: 50px;
    background: linear-gradient(180deg,
            rgba(255, 255, 255, 0.6),
            transparent);
    animation: scroll-pulse 2s ease-in-out infinite;
}

@keyframes scroll-pulse {

    0%,
    100% {
        opacity: 0.4;
        transform: scaleY(1);
    }

    50% {
        opacity: 1;
        transform: scaleY(1.2);
    }
}

/* =============================================
   セクション装飾
   ============================================= */
.section-ornament {
    width: 40px;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(26, 60, 42, 0.4), transparent);
    margin: 0 auto;
}

.section-ornament.top {
    margin-bottom: 60px;
}

.section-ornament.bottom {
    margin-top: 20px;
}

/* =============================================
   SECTION 2: イントロダクション
   ============================================= */
.intro {
    padding: 100px 20px;
    max-width: 680px;
    margin: 0 auto;
    text-align: center;
    position: relative;
}

/* 和紙テクスチャ風 */
.intro::before {
    content: '';
    position: absolute;
    top: 0;
    left: -50vw;
    right: -50vw;
    height: 100%;
    background:
        linear-gradient(180deg, #f8f6f0 0%, #f5f0e8 50%, #f8f6f0 100%);
    background-image:
        radial-gradient(ellipse at 20% 50%, rgba(200, 180, 150, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 30%, rgba(180, 160, 130, 0.06) 0%, transparent 50%);
    pointer-events: none;
    z-index: -1;
}

.intro p {
    font-family: "Noto Serif JP", serif;
    font-size: 17px;
    line-height: 2.8;
    letter-spacing: 0.15em;
    color: #333;
    margin-bottom: 2em;
    position: relative;
}

/* =============================================
   SECTION 3: 光圀公の言葉（引用セクション）
   ============================================= */
.quote {
    background: #2a2a2a;
    padding: 100px 20px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

/* 背景の大きな文字装飾 */
.quote-bg-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-family: "Noto Serif JP", serif;
    font-size: 240px;
    font-weight: 700;
    color: rgba(255, 255, 255, 0.02);
    white-space: nowrap;
    pointer-events: none;
    letter-spacing: 0.3em;
    writing-mode: vertical-rl;
}

.quote-inner {
    max-width: 600px;
    margin: 0 auto;
    position: relative;
}

.quote p {
    font-family: "Noto Serif JP", serif;
    font-size: 20px;
    line-height: 3.0;
    letter-spacing: 0.2em;
    color: #f0e6d3;
    margin-bottom: 1.5em;
}

.quote .highlight {
    font-size: 28px;
    font-weight: 600;
    color: #f0e6d3;
    display: block;
    margin: 40px 0 0;
    line-height: 2.4;
}

.quote .highlight .red {
    color: #c53d43;
    text-shadow: 0 0 20px rgba(197, 61, 67, 0.3);
}

/* =============================================
   SECTION 4: 陰陽とは
   ============================================= */
.philosophy {
    padding: 100px 20px;
    background-color: #f8f6f0;
    position: relative;
}

.section-heading {
    font-family: "Noto Serif JP", serif;
    font-size: 24px;
    font-weight: 600;
    letter-spacing: 0.2em;
    color: #1a3c2a;
    text-align: center;
    margin-bottom: 60px;
    position: relative;
}

.section-heading::after {
    content: '';
    display: block;
    width: 30px;
    height: 2px;
    background: #c53d43;
    margin: 20px auto 0;
}

.philosophy-text {
    font-family: "Noto Serif JP", serif;
    max-width: 640px;
    margin: 0 auto;
    text-align: center;
}

.philosophy-text p {
    font-family: "Noto Serif JP", serif;
    font-size: 16px;
    line-height: 2.6;
    letter-spacing: 0.12em;
    color: #4a4a4a;
    margin-bottom: 2em;
}

/* =============================================
   SECTION 5: 巨石信仰
   ============================================= */
.megalith {
    padding: 120px 20px;
    text-align: center;
    background: linear-gradient(180deg, #f5f0e8 0%, #f8f6f0 100%);
    position: relative;
}

.megalith-main {
    font-family: "Noto Serif JP", serif;
    font-size: 22px;
    line-height: 2.6;
    letter-spacing: 0.15em;
    color: #333;
    margin-bottom: 3em;
}

.megalith-question {
    font-family: "Noto Serif JP", serif;
    font-size: 20px;
    line-height: 2.6;
    letter-spacing: 0.15em;
    color: #4a4a4a;
    font-style: italic;
    max-width: 640px;
    margin: 0 auto;
    border-top: 1px solid rgba(26, 60, 42, 0.2);
    border-bottom: 1px solid rgba(26, 60, 42, 0.2);
    padding: 2em 0;
    position: relative;
}

/* =============================================
   SECTION 6-10: 石の哲学セクション
   ============================================= */
.stone-philosophy {
    padding: 100px 20px;
    background-color: #f8f6f0;
    position: relative;
}

.stone-philosophy.alt-bg {
    background-color: #f5f5f5;
}

.stone-number {
    font-family: "Noto Serif JP", serif;
    font-size: 18px;
    font-weight: 600;
    letter-spacing: 0.15em;
    color: #1a3c2a;
    margin-bottom: 2.5em !important;
    position: relative;
}

.stone-number::after {
    content: '';
    display: block;
    width: 40px;
    height: 2px;
    background-color: #c53d43;
    margin: 20px auto 0;
}

/* 循環テキスト */
.cycle-text {
    font-weight: 500;
    letter-spacing: 0.2em !important;
    color: #1a3c2a !important;
    padding: 1em 0;
    border-top: 1px solid rgba(26, 60, 42, 0.1);
    border-bottom: 1px solid rgba(26, 60, 42, 0.1);
}

/* 強調行 */
.emphasis-line {
    font-size: 18px !important;
    font-weight: 500;
    color: #1a3c2a !important;
    position: relative;
    padding-top: 1em;
}

/* =============================================
   SECTION 11: 祭りの意味
   ============================================= */
.festival-meaning {
    padding: 100px 20px;
    background: linear-gradient(135deg, #1a3c2a 0%, #2a4a3a 50%, #1a3c2a 100%);
    position: relative;
    overflow: hidden;
}

/* 背景装飾 */
.festival-meaning::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 400px;
    height: 400px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(184, 134, 11, 0.05) 0%, transparent 70%);
    pointer-events: none;
}

.festival-meaning .philosophy-text p {
    color: #f0e6d3;
}

.festival-meaning .stone-number {
    color: #b8860b;
}

.festival-meaning .stone-number::after {
    background-color: #b8860b;
}

/* 矢印の接続ライン */
.connection-line {
    position: relative;
    padding-left: 20px;
    text-align: left !important;
    max-width: 500px;
    margin-left: auto !important;
    margin-right: auto !important;
    font-size: 15px !important;
    letter-spacing: 0.1em !important;
    margin-bottom: 1em !important;
    opacity: 0.9;
}

.connection-line::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    width: 12px;
    height: 1px;
    background: #b8860b;
}

.festival-conclusion {
    font-size: 18px !important;
    font-weight: 500;
    color: #ffffff !important;
    border-left: 3px solid #c53d43;
    padding-left: 20px;
    text-align: left;
    margin-top: 2em;
}

/* =============================================
   SECTION 12: まとめの言葉
   ============================================= */
.summary {
    padding: 100px 20px;
    background: linear-gradient(180deg, #f8f6f0 0%, #f5f0e8 50%, #f8f6f0 100%);
    position: relative;
}

.summary::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        radial-gradient(ellipse at 30% 40%, rgba(200, 180, 150, 0.06) 0%, transparent 50%),
        radial-gradient(ellipse at 70% 60%, rgba(180, 160, 130, 0.05) 0%, transparent 50%);
    pointer-events: none;
}

.summary .philosophy-text {
    position: relative;
}

.summary .philosophy-text p {
    font-size: 17px;
    line-height: 2.8;
    color: #333;
}

/* =============================================
   SECTION 13: 開催情報（2カラム交互レイアウト）
   ============================================= */
.info-section {
    background: #2a2a2a;
    position: relative;
}

.info-row-block {
    display: grid;
    grid-template-columns: 1fr 1fr;
    min-height: 400px;
}

.info-row-block.reverse {
    direction: rtl;
}

.info-row-block.reverse>* {
    direction: ltr;
}

.info-image {
    position: relative;
    overflow: hidden;
}

.info-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.6s ease;
}

.info-row-block:hover .info-image img {
    transform: scale(1.03);
}

.info-image-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(0, 0, 0, 0.2), rgba(0, 0, 0, 0.1));
    pointer-events: none;
}

.info-text-block {
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 60px 50px;
    background: #2a3a30;
    color: #f0ede6;
}

.info-row-block.reverse .info-text-block {
    background: #1e2e24;
}

.info-block-title {
    font-family: "Noto Serif JP", serif;
    font-size: 28px;
    font-weight: 600;
    letter-spacing: 0.15em;
    color: #ffffff;
    margin-bottom: 30px;
    position: relative;
    padding-bottom: 20px;
}

.info-block-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 2px;
    background: #c53d43;
}

.info-detail-row {
    display: flex;
    align-items: baseline;
    margin-bottom: 12px;
}

.info-label {
    font-size: 12px;
    letter-spacing: 0.15em;
    color: rgba(255, 255, 255, 0.5);
    min-width: 50px;
    flex-shrink: 0;
}

.info-value {
    font-size: 15px;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.9);
}

.info-description p {
    font-size: 15px;
    line-height: 2.2;
    color: rgba(255, 255, 255, 0.85);
    font-family: "Noto Sans JP", sans-serif;
}

/* =============================================
   SECTION: 代表挨拶
   ============================================= */
.greeting {
    padding: 100px 20px;
    background: linear-gradient(180deg, #f8f6f0 0%, #f5f0e8 50%, #f8f6f0 100%);
    position: relative;
}

.greeting-inner {
    max-width: 900px;
    margin: 0 auto;
}

.greeting .section-heading {
    margin-bottom: 50px;
}

.greeting-content {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 50px;
    align-items: start;
}

.greeting-photo {
    position: relative;
    width: 100%;
    aspect-ratio: 3 / 4;
    overflow: hidden;
    border-radius: 4px;
    background: linear-gradient(135deg, #d4cfc5 0%, #b8b0a4 100%);
}

.greeting-photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.greeting-photo::after {
    content: '';
    position: absolute;
    inset: 0;
    border: 1px solid rgba(26, 60, 42, 0.1);
    border-radius: 4px;
    pointer-events: none;
}

.greeting-catchphrase {
    font-family: "Noto Serif JP", serif;
    font-size: 20px;
    font-weight: 600;
    line-height: 2.2;
    letter-spacing: 0.12em;
    color: #1a3c2a;
    margin-bottom: 30px;
    padding-bottom: 30px;
    border-bottom: 1px solid rgba(26, 60, 42, 0.15);
    text-align: center;
}

.greeting-toggle-wrapper {
    text-align: center;
    margin-bottom: 10px;
}

.greeting-profile {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: 40px;
}

.greeting-photo {
    width: 180px;
    height: 180px;
    border-radius: 50%;
    overflow: hidden;
    border: 3px solid rgba(26, 60, 42, 0.15);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    margin-bottom: 20px;
}

.greeting-photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.greeting-profile-name {
    font-family: "Noto Serif JP", serif;
    font-size: 20px;
    font-weight: 600;
    letter-spacing: 0.2em;
    color: #1a3c2a;
}

.greeting-body p {
    font-family: "Noto Sans JP", sans-serif;
    font-size: 15px;
    line-height: 2.2;
    letter-spacing: 0.05em;
    color: #4a4a4a;
    margin-bottom: 1.5em;
    text-align: justify;
}

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

.greeting-name {
    font-family: "Noto Serif JP", serif;
    font-size: 22px;
    font-weight: 600;
    letter-spacing: 0.2em;
    color: #1a3c2a;
    text-align: right;
    margin-top: 40px;
    padding-top: 30px;
    border-top: 1px solid rgba(26, 60, 42, 0.15);
}

@media (max-width: 768px) {
    .greeting {
        padding: 60px 16px;
    }

    .greeting-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .greeting-photo {
        max-width: 200px;
        margin: 0 auto;
    }

    .greeting-catchphrase {
        font-size: 17px;
        text-align: center;
    }

    .greeting-body p {
        font-size: 14px;
    }

    .greeting-name {
        font-size: 18px;
    }
}

/* =============================================
   SECTION 14: フッター
   ============================================= */
.site-footer {
    background: #2a2a2a;
    padding: 60px 20px;
    text-align: center;
    position: relative;
}

.footer-content {
    position: relative;
}

.footer-emblem {
    width: 60px;
    height: 60px;
    margin: 0 auto 20px;
    opacity: 0.6;
}

.footer-org {
    font-family: "Noto Serif JP", serif;
    font-size: 14px;
    letter-spacing: 0.15em;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 10px;
}

.footer-copy {
    font-size: 12px;
    letter-spacing: 0.1em;
    color: rgba(255, 255, 255, 0.5);
}

/* =============================================
   セクション間の装飾線
   ============================================= */
.intro::after,
.philosophy::after,
.megalith::after,
.summary::after {
    content: '';
    display: block;
    width: 1px;
    height: 60px;
    background: linear-gradient(180deg, rgba(26, 60, 42, 0.3), transparent);
    margin: 0 auto;
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
}

/* =============================================
   レスポンシブ
   ============================================= */
@media (max-width: 768px) {
    .main-title {
        font-size: 42px;
        letter-spacing: 0.3em;
    }

    .pre-title {
        font-size: 12px;
        letter-spacing: 0.15em;
        padding: 0 10px;
    }

    .title-caption {
        font-size: 16px;
    }

    .hero {
        padding: 80px 16px;
    }

    .hero-spacer-60 {
        height: 40px;
    }

    .hero-spacer-40 {
        height: 24px;
    }

    .hero-yinyang-decoration {
        width: 200px;
        height: 200px;
    }

    .intro {
        padding: 60px 16px;
    }

    .intro p {
        font-size: 15px;
        line-height: 2.4;
    }

    .quote {
        padding: 60px 16px;
    }

    .quote p {
        font-size: 17px;
        line-height: 2.6;
    }

    .quote .highlight {
        font-size: 22px;
    }

    .quote-bg-text {
        font-size: 120px;
    }

    .philosophy,
    .stone-philosophy,
    .festival-meaning,
    .summary {
        padding: 60px 16px;
    }

    .section-heading {
        font-size: 20px;
        margin-bottom: 40px;
    }

    .philosophy-text p {
        font-size: 15px;
        line-height: 2.4;
        padding: 0 4px;
    }

    .megalith {
        padding: 80px 16px;
    }

    .megalith-main {
        font-size: 18px;
    }

    .megalith-question {
        font-size: 17px;
    }

    .stone-number {
        font-size: 16px;
    }

    .festival-conclusion {
        font-size: 16px !important;
    }

    .connection-line {
        padding-left: 16px;
    }

    .info-row-block {
        grid-template-columns: 1fr;
        min-height: auto;
    }

    .info-row-block.reverse {
        direction: ltr;
    }

    .info-image {
        height: 250px;
    }

    .info-text-block {
        padding: 40px 24px;
    }

    .info-block-title {
        font-size: 22px;
    }

    .info-section {
        padding: 60px 16px;
    }

    .info-row {
        flex-direction: column;
    }

    .info-label {
        margin-bottom: 2px;
    }

    .info-section::before {
        font-size: 20px;
    }
}

/* =============================================
   スクロールバーのスタイリング
   ============================================= */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: #f8f6f0;
}

::-webkit-scrollbar-thumb {
    background: rgba(26, 60, 42, 0.3);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(26, 60, 42, 0.5);
}

/* セレクション */
::selection {
    background-color: rgba(197, 61, 67, 0.2);
    color: #333;
}

/* =============================================
   スムーズパララックス効果
   ============================================= */
.quote,
.festival-meaning {
    background-attachment: fixed;
}

@media (max-width: 768px) {

    .quote,
    .festival-meaning {
        background-attachment: scroll;
    }
}

/* =============================================
   折りたたみ（続きを読む）
   ============================================= */
.read-more-wrapper {
    text-align: center;
    padding: 40px 20px 60px;
    background-color: #f8f6f0;
    position: relative;
}

.read-more-wrapper::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 1px;
    height: 30px;
    background: linear-gradient(180deg, rgba(26, 60, 42, 0.2), transparent);
}

.read-more-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 40px;
    background: transparent;
    border: 1px solid #1a3c2a;
    color: #1a3c2a;
    font-family: "Noto Serif JP", serif;
    font-size: 15px;
    letter-spacing: 0.2em;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
}

.read-more-btn:hover {
    background: #1a3c2a;
    color: #f8f6f0;
}

.read-more-arrow {
    font-size: 14px;
    transition: transform 0.3s ease;
    animation: arrow-bounce 2s ease-in-out infinite;
}

@keyframes arrow-bounce {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(4px);
    }
}

.read-more-btn:hover .read-more-arrow {
    animation: none;
}

/* 折りたたみコンテンツ */
.collapsible-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.collapsible-content.expanded {
    max-height: none;
}

/* 閉じるボタン */
.close-content-wrapper {
    text-align: center;
    padding: 40px 20px 60px;
    background: linear-gradient(180deg, #f8f6f0 0%, #f5f0e8 100%);
}

.close-content-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 36px;
    background: transparent;
    border: 1px solid rgba(26, 60, 42, 0.4);
    color: #1a3c2a;
    font-family: "Noto Serif JP", serif;
    font-size: 14px;
    letter-spacing: 0.2em;
    cursor: pointer;
    transition: all 0.3s ease;
}

.close-content-btn:hover {
    background: #1a3c2a;
    color: #f8f6f0;
}

.close-content-arrow {
    font-size: 13px;
}

/* 非表示状態 */
.read-more-wrapper.hidden {
    display: none;
}