* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* 画像の簡易保護（右クリック・ドラッグ保存の抑止。開発者ツール等では回避可能） */
img {
    -webkit-user-drag: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

/* オープニングアニメーション */
.opening-animation {
    position: fixed;
    inset: 0;
    background: #ffec61;
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 10001;
    transition: opacity 0.5s ease;
    perspective: 1000px;
}

.opening-animation.show {
    display: flex;
}

.opening-card {
    position: relative;
    width: 300px;
    height: 300px;
    transform-style: preserve-3d;
    transform: translateY(100px);
    opacity: 0;
    transition: transform 1.5s ease-out, opacity 1.5s ease-out;
}

.opening-card.float-up {
    transform: translateY(0);
    opacity: 1;
}

.opening-card.rotate {
    animation: rotateCard 2s ease-in-out forwards;
}

.opening-card .card-front,
.opening-card .card-back {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    transform-style: preserve-3d;
}

.opening-card .card-front {
    transform: rotateY(0deg);
}

.opening-card .card-back {
    transform: rotateY(180deg);
}

.opening-card img {
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
    object-fit: contain;
}

@keyframes rotateCard {
    0% {
        transform: translateY(0) rotateY(0deg);
    }

    100% {
        transform: translateY(0) rotateY(180deg);
    }
}

/* オープニングアニメーションここまで */

/* フェードインアニメーション */
.fade-in {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ナビはフェード対象外（メニュー開閉が効くように常に表示） */
nav.fade-in {
    opacity: 1;
    transform: none;
}

/* 会期・会場ブロックは親はフェードせず子だけ段階表示 */
.period-venue-block.fade-in {
    opacity: 1;
    transform: none;
}

.period-venue-block .period-venue-label,
.period-venue-block .period-venue-date,
.period-venue-block .period-venue-name {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.period-venue-block.is-visible .period-venue-label {
    opacity: 1;
    transform: translateY(0);
    transition-delay: 0s;
}

.period-venue-block.is-visible .period-venue-date {
    opacity: 1;
    transform: translateY(0);
    transition-delay: 0.15s;
}

.period-venue-block.is-visible .period-venue-name {
    opacity: 1;
    transform: translateY(0);
    transition-delay: 0.3s;
}

/* フェードインアニメーションここまで */

body {
    font-family: "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Meiryo", "MS PGothic", sans-serif;
    line-height: 1.8;
    color: #000;
    background: #fff;
    min-height: 100vh;
}

main.container {
    background: #fff;
}

.container {
    width: 100%;
    margin: 0 auto;
    padding: 15px;
}

/* ヘッダー - モバイルを基本 */
header {
    width: 100%;
    background: #ffec61;
}

.header-image {
    width: 100%;
    position: relative;
    margin: 0 auto;
    padding-top: 55px;
    padding-bottom: 0px;
    padding-left: 20px;
    padding-right: 20px;
    box-sizing: border-box;
}

.header-image img {
    width: 100%;
    max-width: 280px;
    height: auto;
    display: block;
    margin: 0 auto;
}

.header-img-pc {
    display: none !important;
}

.header-img-sp {
    display: block !important;
}

/* 会期・会場ブロック（メインビジュアル下） */
.period-venue-block {
    background: #ffec61;
    text-align: center;
    padding: 28px 15px 32px;
    position: relative;
    z-index: 0;
}

.period-venue-title {
    font-size: 0;
    line-height: 0;
    margin: 0;
    padding: 0;
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(1px, 1px, 1px, 1px);
    white-space: nowrap;
}

.period-venue-label {
    display: inline-block;
    background: #000;
    color: #fff;
    font-size: 0.95em;
    font-weight: bold;
    padding: 4px 10px;
    margin: 0 0 18px;
    letter-spacing: 0.08em;
}

.period-venue-date {
    font-size: 1em;
    font-weight: bold;
    color: #000;
    margin: 0 0 12px;
    letter-spacing: 0.02em;
}

.period-venue-date .period-venue-num {
    font-size: 1.5em;
    font-weight: bold;
}

.period-venue-name {
    font-size: 1.15em;
    font-weight: bold;
    color: #000;
    margin: 0;
    letter-spacing: 0.05em;
}

.period-venue-gallery {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
    margin-top: 16px;
}

.period-venue-thumb {
    flex: 1 1 180px;
    max-width: 230px;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 140px;
    min-height: 0;
}

.period-venue-thumb img {
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
    object-fit: contain;
    display: block;
}

/* スマホ：作品画像を小さくして横並び（3枚）にする */
@media screen and (max-width: 767px) {
    .period-venue-gallery {
        flex-wrap: nowrap;
        justify-content: space-between;
        gap: 8px;
        margin-top: 12px;
    }

    .period-venue-block {
        padding: 22px 12px 28px;
    }

    .period-venue-date {
        font-size: 0.95em;
        margin: 0 0 10px;
        letter-spacing: 0.01em;
    }

    .period-venue-date .period-venue-num {
        font-size: 1.25em;
    }

    .period-venue-name {
        font-size: 1.0em;
        letter-spacing: 0.03em;
    }

    .period-venue-thumb {
        flex: 0 0 calc((100% - 16px) / 3);
        max-width: none;
        height: 120px;
    }
}

/* ハンバーガーボタン - スマホのみ・フローティング */
.nav-toggle {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 6px;
    position: fixed;
    top: 20px;
    right: 20px;
    width: 44px;
    height: 44px;
    padding: 0;
    background: #000;
    border: none;
    cursor: pointer;
    z-index: 9998;
    transition: background 0.3s ease;
    border-radius: 4px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.nav-toggle:hover {
    background: #333;
}

.nav-toggle-bar {
    display: block;
    width: 24px;
    height: 2px;
    background: #fff;
    transition: transform 0.3s ease, opacity 0.3s ease;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) {
    opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

/* メニューオーバーレイ（body直下・スマホ・PC共通） */
.nav-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.95);
    z-index: 9999;
    display: none;
    align-items: flex-start;
    justify-content: center;
    padding: 72px 16px 24px;
    box-sizing: border-box;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
}

.nav-overlay.is-open {
    display: flex;
}

/* スマホでヘッダーメニュー表示中はページトップ・チケットバナーを非表示 */
@media screen and (max-width: 767px) {
    body:has(.nav-overlay.is-open) .page-top,
    body:has(.nav-overlay.is-open) .ticket-banner {
        visibility: hidden;
        pointer-events: none;
    }
}

.nav-overlay-close {
    position: fixed;
    top: 20px;
    right: 20px;
    width: 50px;
    height: 50px;
    padding: 0;
    background: #fff;
    border: 2px solid #000;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    transition: all 0.3s ease;
}

.nav-overlay-close:hover {
    background: #000;
    border-color: #fff;
}

.nav-overlay-close-icon {
    font-size: 32px;
    line-height: 1;
    color: #000;
    font-weight: bold;
    transition: color 0.3s ease;
}

.nav-overlay-close:hover .nav-overlay-close-icon {
    color: #fff;
}

.nav-overlay-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    width: 100%;
    max-width: 400px;
    margin: 0 auto;
    padding-bottom: 16px;
    box-sizing: border-box;
}

.nav-overlay-inner .nav-note-inline {
    display: inline;
    white-space: nowrap;
}

.nav-overlay-inner a {
    display: block;
    width: 100%;
    padding: 10px 14px;
    background: #000;
    color: #fff;
    text-decoration: none;
    text-align: center;
    font-size: 0.95em;
    line-height: 1.35;
    border: 2px solid #fff;
    border-radius: 4px;
    flex-shrink: 0;
}

.nav-overlay-inner a:hover,
.nav-overlay-inner a:active {
    opacity: 0.9;
}

/* ナビ（画面上は非表示・オーバーレイで表示） */
nav {
    background: transparent;
    padding: 0;
    width: 100%;
}

nav .nav-container {
    display: none !important;
}

nav a {
    display: flex;
    align-items: center;
    justify-content: center;
    background: #000;
    color: #fff;
    text-decoration: none;
    font-size: 0.9em;
    padding: 12px 15px;
    border-radius: 0;
    transition: all 0.3s ease;
    position: relative;
    min-height: 50px;
    text-align: center;
}

nav a::after {
    content: "▼";
    margin-left: 8px;
    font-size: 0.7em;
}

nav a:hover,
nav a:active {
    background: #000;
    color: #fff;
    text-decoration: none;
    opacity: 0.8;
}

/* メインコンテンツ - モバイル基本 */
main.container {
    padding: 0;
    position: relative;
}

/* セクション - モバイル基本 */
section {
    margin: 0;
    padding: 30px 15px;
    background: #fff;
    border-bottom: none;
    position: relative;
}

section:first-child {}

section+section {
    margin-top: 0;
}

.artist-section+section {
    margin-top: 30px;
    padding-top: 50px;
}

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

section:nth-child(even)>h2 {
    background: linear-gradient(135deg, #c40019 0%, #e6001b 50%, #ff1a33 100%);
    margin: -30px -15px 25px -15px;
}

h2 {
    font-size: 1.5em;
    color: #fff;
    background: linear-gradient(135deg, #c40019 0%, #e6001b 50%, #ff1a33 100%);
    padding: 14px 15px 14px 20px;
    margin: -30px -15px 25px -15px;
    font-weight: 700;
    letter-spacing: 0.12em;
    position: relative;
    box-shadow: 0 4px 12px rgba(230, 0, 27, 0.35);
    border-left: 5px solid rgba(255, 255, 255, 0.4);
}

h2::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: rgba(0, 0, 0, 0.15);
}

h3 {
    font-size: 1.2em;
    color: #000;
    margin: 25px 0 15px;
    font-weight: bold;
}

/* テーブル - モバイル基本 */
table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
    font-size: 0.9em;
}

table td {
    padding: 12px 10px;
    border: 1px solid #b6b6b6;
    word-break: break-word;
    vertical-align: top;
}

table td:first-child {
    background: #f7f7f7;
    color: #000;
    width: 10%;
    min-width: 90px;
}

table tr:hover {
    background-color: #fff;
    transition: background-color 0.3s ease;
}

.intro {
    margin: 25px 0;
    line-height: 2;
    font-size: 0.95em;
}

.intro p {
    margin-bottom: 20px;
}

.note-small {
    font-size: 0.75em;
    opacity: 0.9;
}

.ticket-info {
    margin: 30px 0;
}

.ticket-info h3 {
    font-size: 1.3em;
    color: #000;
    margin: 30px 0 15px;
    font-weight: bold;
    padding-bottom: 8px;
    border-bottom: 2px solid #e6001b;
}

.ticket-info h3:first-child {
    margin-top: 0;
}

.ticket-info ul {
    margin: 15px 0 25px;
    padding-left: 20px;
}

.ticket-info li {
    margin: 8px 0;
    line-height: 1.8;
    font-size: 0.95em;
}

.ticket-info a {
    color: #e6001b;
    text-decoration: underline;
    transition: opacity 0.3s ease;
}

.ticket-info a:hover,
.ticket-info a:active {
    opacity: 0.7;
    text-decoration: underline;
}

.ticket-price-title {
    margin-bottom: 12px;
}

.ticket-price-table {
    width: 100%;
    max-width: 520px;
    border-collapse: collapse;
    margin: 0 0 20px;
    font-size: 0.95em;
}

.ticket-price-table th,
.ticket-price-table td {
    border: 1px solid #333;
    padding: 12px 15px;
    text-align: center;
}

.ticket-price-table thead th {
    background: #f5f5f5;
    font-weight: bold;
}

.ticket-price-table tbody th {
    background: #fafafa;
    text-align: left;
    font-weight: bold;
}

.ticket-notes {
    list-style: none;
    padding-left: 0;
    margin: 0 0 20px;
}

.ticket-notes li {
    margin: 6px 0;
    line-height: 1.7;
    font-size: 0.9em;
}

.ticket-advance-period {
    background: #e6001b;
    color: #fff;
    padding: 12px 20px;
    margin: 0 0 28px;
    text-align: center;
    font-weight: bold;
    font-size: 1em;
}

.ticket-sales-title {
    margin-top: 0;
}

.ticket-sales-section {
    margin: 35px 0 45px;
}

.ticket-sales-section:first-of-type {
    margin-top: 0;
}

.ticket-sales-period {
    margin: 8px 0 20px;
    font-size: 0.9em;
    line-height: 1.6;
}

.ticket-online-banner {
    display: block;
    background: #fdf8e8;
    border: 1px solid #e8d9a8;
    padding: 20px;
    margin: 0 0 25px;
    text-align: center;
    color: #333;
    text-decoration: none;
    font-weight: bold;
    line-height: 1.6;
}

.ticket-online-banner:hover {
    opacity: 0.9;
}

.ticket-online-catch {
    display: block;
    text-align: center;
    font-weight: bold;
    margin-bottom: 12px;
    font-size: 1em;
}

.ticket-online-image {
    display: block;
    width: 50%;
    height: auto;
    margin: 0 auto;
}

@media screen and (max-width: 767px) {
    .ticket-online-image {
        width: 100%;
        height: auto;
        margin: 0 auto;
    }
}

.ticket-online-btn {
    display: inline-block;
    background: #c4a052;
    color: #fff;
    padding: 10px 24px;
    margin-top: 10px;
    border-radius: 4px;
    font-size: 0.95em;
}

.ticket-sales-table {
    width: 100%;
    border-collapse: collapse;
    margin: 0 0 20px;
    font-size: 0.9em;
}

.ticket-sales-table th,
.ticket-sales-table td {
    border: 1px solid #333;
    padding: 10px 12px;
    vertical-align: top;
}

.ticket-sales-table thead th {
    background: #f5f5f5;
    font-weight: bold;
}

.ticket-sales-table tbody td:first-child {
    background: #fafafa;
    font-weight: bold;
    min-width: 140px;
}

.ticket-type-tag {
    display: inline-block;
    background: #ddd;
    color: #333;
    font-size: 0.75em;
    padding: 2px 6px;
    margin-bottom: 4px;
    font-weight: normal;
}

.ticket-sales-table a {
    color: #e6001b;
    word-break: break-all;
}

/* スマホ: チケット発売所表の列幅を 40:5:55 に */
@media screen and (max-width: 767px) {
    .ticket-sales-table {
        table-layout: fixed;
    }

    .ticket-sales-table .col-vendor {
        width: 30%;
    }

    .ticket-sales-table .col-method {
        width: 10%;
    }

    .ticket-sales-table .col-address {
        width: 60%;
    }

    .ticket-sales-table tbody td:first-child {
        min-width: 0;
    }
}

ul {
    margin: 20px 0;
    padding-left: 20px;
}

li {
    margin: 10px 0;
    line-height: 2;
    position: relative;
    font-size: 0.95em;
}

li::marker {
    color: #e6001b;
    font-weight: bold;
}

.image-gallery {
    margin: 30px 0;
}

.image-wrapper {
    position: relative;
    width: 100%;
    margin: 20px 0;
    user-select: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
}

.image-wrapper img {
    width: 100%;
    height: auto;
    display: block;
    pointer-events: none;
    -webkit-user-drag: none;
    -khtml-user-drag: none;
    -moz-user-drag: none;
    -o-user-drag: none;
    user-drag: none;
}

.image-placeholder {
    width: 100%;
    height: 300px;
    background: #fff;
    border: 1px solid #000;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #000;
    margin: 20px 0;
}

.copyright {
    text-align: center;
    color: #000;
    font-size: 0.85em;
    margin: 30px 0 20px;
    padding: 15px;
    background: #fff;
    border-radius: 0;
    border: none;
    line-height: 2;
}

/* みどころセクションはページ内では非表示にする */
#highlights {
    display: none;
}

footer {
    background: #000;
    padding: 30px 15px;
    margin-top: 0;
    text-align: center;
    color: #fff;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
}

.footer-nav {
    margin-bottom: 20px;
    background: #000;
}

.footer-nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-nav li {
    margin: 0;
}

.footer-nav a {
    color: #fff;
    text-decoration: none;
    font-size: 0.9em;
    transition: opacity 0.3s ease;
}

.footer-nav a:hover {
    opacity: 0.7;
    text-decoration: underline;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px solid #333;
}

.footer-links a {
    color: #fff;
    text-decoration: none;
    font-size: 0.85em;
    transition: opacity 0.3s ease;
}

.footer-links a:hover {
    opacity: 0.7;
    text-decoration: underline;
}

.footer-copyright {
    padding-top: 15px;
}

.footer-copyright p {
    color: #fff;
    font-size: 0.85em;
    line-height: 1.8;
    margin: 5px 0;
}

footer p {
    color: #fff;
    font-size: 0.9em;
    line-height: 1.8;
}

/* ページトップへ戻るボタン */
.page-top {
    position: fixed;
    right: 20px;
    bottom: 20px;
    max-width: 60px;
    z-index: 9999;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    cursor: pointer;
}

.page-top.show {
    opacity: 1;
    visibility: visible;
}

.page-top img {
    width: 100%;
    height: auto;
    display: block;
}

.page-top:hover {
    transform: translateY(-5px);
}

/* スマホ: チケットバナーを画面下部に表示 */
.ticket-banner {
    position: fixed;
    left: 40%;
    bottom: 20px;
    top: auto;
    transform: translateX(-50%);
    max-width: 230px;
    z-index: 9999;
    cursor: pointer;
    transition: transform 0.3s ease, opacity 0.3s ease;
}

.ticket-banner-sp {
    display: block;
    width: 100%;
    height: auto;
}

.ticket-banner-pc {
    display: none;
}

.ticket-banner:hover {
    transform: translateX(-50%) translateY(-5px);
    opacity: 0.9;
}

/* PC: チケットバナーを画面右側に表示 */
@media screen and (min-width: 768px) {
    .ticket-banner {
        left: auto;
        right: 20px;
        top: 200px;
        bottom: auto;
        transform: none;
        max-width: 100px;
    }

    .ticket-banner:hover {
        transform: translateY(-5px);
    }

    .ticket-banner-sp {
        display: none;
    }

    .ticket-banner-pc {
        display: block;
        width: 100%;
        height: auto;
    }
}

.ticket-banner img {
    width: 100%;
    height: auto;
}

.highlight {
    background: #fff;
    padding: 25px 20px;
    border-left: 5px solid #e6001b;
    margin: 30px 0;
    border-radius: 0;
}

.highlight h3 {
    color: #000;
    margin-top: 0;
    font-size: 1.1em;
}

.highlight p {
    font-size: 0.9em;
    line-height: 2;
}

/* みどころセクション - モバイル基本 */
.highlight-item {
    margin: 40px 0;
}

.highlight-item:not(:first-child) {
    border-top: 1px solid #ddd;
    padding-top: 40px;
}

.highlight-image-block {
    width: 100%;
}

.highlight-item h3 {
    font-size: 1.3em;
    color: #000;
    margin: 10px 0 0;
    font-weight: bold;
}

.highlight-content {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.highlight-image {
    width: 100%;
}

.highlight-image img {
    width: 100%;
    height: auto;
    display: block;
    user-select: none;
    -webkit-user-drag: none;
    -khtml-user-drag: none;
    -moz-user-drag: none;
    -o-user-drag: none;
    user-drag: none;
    pointer-events: none;
}

.highlight-text {
    line-height: 2;
    font-size: 0.95em;
}

.highlight-text p {
    margin-bottom: 20px;
    color: #000;
}

.artwork-title {
    font-weight: bold;
    margin-top: 15px !important;
    color: #000 !important;
}

/* 草間彌生紹介セクション - モバイル基本 */
.artist-section {
    background: #000 !important;
    padding: 30px 15px;
    margin: 0;
    border-bottom: none;
}

.artist-section:not(:first-child) {}

.artist-section:nth-child(even) {
    background: #000 !important;
}

.artist-content {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.artist-image-wrapper {
    width: 100%;
    text-align: center;
}

.artist-image-wrapper img {
    width: 100%;
    max-width: 300px;
    height: auto;
    display: block;
    margin: 0 auto;
    user-select: none;
    -webkit-user-drag: none;
    -khtml-user-drag: none;
    -moz-user-drag: none;
    -o-user-drag: none;
    user-drag: none;
    pointer-events: none;
}

.artist-info {
    color: #fff;
}

.artist-section h2.artist-name {
    font-size: 2em;
    color: #fff;
    text-align: center;
    margin: 20px 0 10px;
    font-weight: bold;
    background: transparent;
    padding: 0;
    border: none;
    letter-spacing: 0.1em;
}

.artist-name-en {
    font-size: 1.2em;
    color: #e6001b;
    text-align: center;
    margin: 0 0 25px;
    font-weight: bold;
    letter-spacing: 0.2em;
}

.artist-bio {
    line-height: 2;
    font-size: 0.95em;
}

.artist-bio p {
    margin-bottom: 20px;
    color: #fff;
}

/* PC表示（768px以上） */
@media screen and (min-width: 768px) {

    /* オープニングアニメーション - PC表示 */
    .opening-card {
        width: 400px;
        height: 400px;
    }

    /* オープニングアニメーション - PC表示ここまで */

    body {
        background: #ffec61;
    }

    .container {
        max-width: 1200px;
        padding: 0;
        background: #fff;
    }

    main.container {
        background: #fff;
    }

    header {
        background: #ffec61;
        max-width: 1200px;
        margin: 0 auto;
    }

    .header-image {
        max-width: 1200px;
        margin: 0 auto;
        background: #ffec61;
        padding: 45px 40px 20px;
        display: flex;
        justify-content: center;
        align-items: center;
    }

    .header-image img.header-img-pc {
        max-width: 640px;
        width: 100%;
        height: auto;
    }

    .header-img-pc {
        display: block !important;
    }

    .header-img-sp {
        display: none !important;
    }

    .period-venue-block {
        padding: 5px 20px 40px;
        border-bottom-width: 5px;
    }

    .period-venue-label {
        font-size: 1em;
        padding: 10px 28px;
        margin-bottom: 22px;
    }

    .period-venue-date {
        font-size: 1.1em;
        margin-bottom: 14px;
    }

    .period-venue-date .period-venue-num {
        font-size: 1.6em;
    }

    .period-venue-name {
        font-size: 1.35em;
    }

    .period-venue-gallery {
        flex-wrap: nowrap;
        justify-content: space-between;
        gap: 18px;
        margin-top: 22px;
    }

    .period-venue-thumb {
        flex: 0 0 calc((100% - 36px) / 3);
        max-width: none;
        height: 320px;
    }

    nav a {
        font-size: 1em;
        padding: 15px 20px;
        min-height: 60px;
    }

    nav a:hover {
        transform: translateY(-2px);
    }

    main.container {
        padding: 0;
    }

    section {
        margin: 0;
        padding: 50px 40px;
        border-bottom: none;
    }

    section:first-child {}

    section+section {}

    .artist-section+section {
        margin-top: 50px;
    }

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

    section:nth-child(even)>h2 {
        background: linear-gradient(135deg, #c40019 0%, #e6001b 50%, #ff1a33 100%);
        margin: -50px -40px 30px -40px;
    }

    section:nth-child(odd) {
        background: #fff;
    }

    .artist-section {
        background: #000 !important;
        border-bottom: none;
    }

    .artist-section:not(:first-child) {}

    .artist-section:nth-child(even) {
        background: #000 !important;
    }

    h2 {
        font-size: 1.8em;
        padding: 18px 30px 18px 28px;
        margin: -50px -40px 30px -40px;
        letter-spacing: 0.12em;
        border-left-width: 6px;
    }

    h2::after {
        height: 4px;
    }

    h3 {
        font-size: 1.5em;
        margin: 35px 0 20px;
    }

    table {
        margin: 30px 0;
        font-size: 1em;
    }

    table td {
        padding: 15px 20px;
    }

    table td:first-child {
        width: 200px;
    }

    .intro {
        margin: 40px 0;
        font-size: 1.05em;
        line-height: 2.2;
    }

    .intro p {
        margin-bottom: 25px;
    }

    .ticket-info {
        margin: 40px 0;
    }

    .ticket-info h3 {
        font-size: 1.5em;
        margin: 40px 0 20px;
    }

    .ticket-info ul {
        margin: 20px 0 30px;
        padding-left: 30px;
    }

    .ticket-info li {
        margin: 10px 0;
        font-size: 1.05em;
        line-height: 2;
    }

    .ticket-info a {
        color: #e6001b;
    }

    .ticket-price-table {
        max-width: none;
        font-size: 1em;
        margin-bottom: 24px;
    }

    .ticket-price-table th,
    .ticket-price-table td {
        padding: 14px 18px;
    }

    .ticket-notes li {
        font-size: 0.95em;
    }

    .ticket-advance-period {
        padding: 14px 24px;
        margin-bottom: 32px;
        font-size: 1.05em;
    }

    .ticket-sales-section {
        margin: 45px 0 55px;
    }

    .ticket-sales-period {
        font-size: 0.95em;
    }

    .ticket-online-banner {
        padding: 25px;
        margin-bottom: 30px;
    }

    .ticket-sales-table {
        font-size: 0.95em;
        margin-bottom: 25px;
    }

    .ticket-sales-table th,
    .ticket-sales-table td {
        padding: 12px 16px;
    }

        /* PC: チケット発売所表の列幅調整（プレイガイド/販売店を広く、購入方法を狭く） */
        .ticket-sales-table .col-vendor {
            width: 20%;
        }

        .ticket-sales-table .col-method {
            width: 10%;
        }

        .ticket-sales-table .col-address {
            width: 70%;
        }

    ul {
        margin: 30px 0;
        padding-left: 30px;
    }

    li {
        margin: 12px 0;
        font-size: 1.05em;
        line-height: 2.2;
    }

    .image-gallery {
        margin: 40px 0;
    }

    .image-wrapper {
        margin: 30px 0;
    }

    .image-placeholder {
        height: 450px;
        margin: 30px 0;
    }

    .copyright {
        font-size: 0.9em;
        margin: 40px 0 30px;
        padding: 20px;
    }

    footer {
        padding: 50px 20px;
    }

    .footer-nav ul {
        flex-direction: row;
        justify-content: center;
        flex-wrap: wrap;
        gap: 20px;
    }

    .footer-nav a {
        font-size: 1em;
    }

    .footer-links {
        flex-direction: row;
        justify-content: center;
        gap: 30px;
    }

    .footer-links a {
        font-size: 0.9em;
    }

    .footer-copyright p {
        font-size: 0.9em;
    }

    footer p {
        font-size: 1em;
    }

    .highlight {
        padding: 35px 30px;
        margin: 40px 0;
    }

    .highlight h3 {
        font-size: 1.3em;
    }

    .highlight p {
        font-size: 1em;
        line-height: 2.2;
    }

    /* 草間彌生紹介セクション - PC表示 */
    .artist-section {
        padding: 50px 40px;
    }

    .artist-content {
        flex-direction: row;
        align-items: flex-start;
        gap: 40px;
        max-width: 1000px;
        margin: 0 auto;
    }

    .artist-image-wrapper {
        flex: 0 0 300px;
        width: 300px;
    }

    .artist-image-wrapper img {
        max-width: 100%;
    }

    .artist-info {
        flex: 1;
    }

    .artist-section h2.artist-name {
        font-size: 2.5em;
        text-align: left;
        margin: 0 0 15px;
    }

    .artist-name-en {
        font-size: 1.5em;
        text-align: left;
        margin: 0 0 30px;
    }

    .artist-bio {
        font-size: 1.05em;
        line-height: 2.2;
    }

    .artist-bio p {
        margin-bottom: 25px;
    }

    /* みどころセクション - PC表示 */
    .highlight-item {
        margin: 60px 0;
        position: relative;
    }

    .highlight-item:not(:first-child) {
        padding-top: 60px;
    }

    .highlight-content {
        flex-direction: row;
        align-items: stretch;
        gap: 40px;
    }

    .highlight-image-block {
        flex: 0 0 400px;
        width: 400px;
        display: flex;
        flex-direction: column;
    }

    .highlight-item h3 {
            font-size: 1.8em;
        margin: -50px 0 10px;
    }

    .highlight-image {
        width: 100%;
        flex: 1 1 auto;
    }

    .highlight-image img {
        width: 100%;
        height: auto;
    }

    .highlight-text {
        flex: 1 1 auto;
        font-size: 1.05em;
        line-height: 2.2;
        display: flex;
        flex-direction: column;
        justify-content: space-between;
    }

    .highlight-text p {
        margin-bottom: 25px;
    }

    .artwork-title {
        margin-top: 12px !important;
        font-size: 1.1em;
    }

    /* ページトップへ戻るボタン - PC表示 */
    .page-top {
        max-width: 80px;
        right: 30px;
        bottom: 30px;
    }
}