:root {
    --color-accent: #111111;
    --color-accent-dark: #000000;
    --color-accent-soft: #f0f0f0;
    --color-bg: #ffffff;
    --color-bg-soft: #f4f4f4;
    --color-surface: #ffffff;
    --color-gold: #111111;
    --color-ink: #111111;
    --color-muted: #6b6b6b;
    --color-border: #dddddd;
    --font-serif: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, 'Hiragino Kaku Gothic ProN', 'Yu Gothic UI', sans-serif;
    --font-sans: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, 'Hiragino Kaku Gothic ProN', 'Yu Gothic UI', sans-serif;
    --radius-lg: 2px;
    --radius-md: 2px;
    --shadow-card: none;
    --shadow-card-hover: 0 12px 28px rgba(17, 17, 17, 0.1);
    --space-8: 8px;
    --space-16: 16px;
    --space-24: 24px;
    --space-32: 32px;
    --space-40: 40px;
    --space-48: 48px;
    --space-56: 56px;
    --space-64: 64px;
    --space-72: 72px;
    --space-80: 80px;
}

html {
    scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        animation-duration: 0.001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.001ms !important;
    }
}

body {
    font-family: var(--font-sans);
    margin: 0;
    background-color: var(--color-bg);
    color: var(--color-ink);
    word-break: break-all;
}

body.nav-open,
body.modal-open {
    overflow: hidden;
}

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

/* サイトヘッダー */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background-color: rgba(255, 255, 255, 0.95);
    border-bottom: 1px solid var(--color-border);
    backdrop-filter: blur(10px);
}

.site-header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1100px;
    margin: 0 auto;
    padding: var(--space-16) var(--space-24);
}

@media (min-width: 769px) {
    .site-header-inner {
        width: min(88%, 1440px);
        max-width: none;
        padding-left: 0;
        padding-right: 0;
    }
}

.site-logo h1 {
    margin: 0;
    line-height: 0;
}

.site-logo-img {
    display: block;
    height: 26px;
    width: auto;
    max-width: 160px;
}

/* ハンバーガーボタン */
.hamburger {
    position: relative;
    width: 32px;
    height: 24px;
    padding: 0;
    border: none;
    background: none;
    cursor: pointer;
}

.hamburger-line {
    position: absolute;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--color-ink);
    border-radius: 2px;
    transition: transform 0.3s ease, opacity 0.3s ease, top 0.3s ease;
}

.hamburger-line:nth-child(1) {
    top: 0;
}

.hamburger-line:nth-child(2) {
    top: 11px;
}

.hamburger-line:nth-child(3) {
    top: 22px;
}

.hamburger.is-open .hamburger-line:nth-child(1) {
    top: 11px;
    transform: rotate(45deg);
}

.hamburger.is-open .hamburger-line:nth-child(2) {
    opacity: 0;
}

.hamburger.is-open .hamburger-line:nth-child(3) {
    top: 11px;
    transform: rotate(-45deg);
}

/* ドロワーナビゲーション */
.header-nav-backdrop {
    position: fixed;
    inset: 0;
    background-color: rgba(43, 36, 32, 0.5);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
    z-index: 110;
}

.header-nav-backdrop.is-open {
    opacity: 1;
    visibility: visible;
}

.header-nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: min(320px, 84vw);
    background-color: var(--color-surface);
    box-shadow: -8px 0 32px rgba(43, 36, 32, 0.18);
    z-index: 120;
    transform: translateX(100%);
    transition: transform 0.3s ease;
    overflow-y: auto;
    padding: var(--space-24) 0 var(--space-40);
}

.header-nav.is-open {
    transform: translateX(0);
}

.header-nav-close {
    display: block;
    margin: 0 var(--space-24) var(--space-16) auto;
    width: 32px;
    height: 32px;
    border: none;
    background: none;
    font-size: 1.6rem;
    line-height: 1;
    color: var(--color-muted);
    cursor: pointer;
}

.header-nav-list {
    list-style: none;
    margin: 0 0 var(--space-24);
    padding: 0;
}

.header-nav-section-title {
    padding: 0 var(--space-24) var(--space-8);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    color: var(--color-accent);
}

.header-nav-list a {
    display: flex;
    align-items: baseline;
    gap: 8px;
    padding: var(--space-16) var(--space-24);
    color: var(--color-ink);
    text-decoration: none;
    font-size: 0.9rem;
    border-top: 1px solid var(--color-border);
}

.header-nav-divider {
    height: 1px;
    margin: var(--space-8) var(--space-24);
    background-color: var(--color-border);
}

.header-nav-icon {
    margin-left: auto;
    font-size: 0.8em;
    color: var(--color-muted);
}

/* ヒーローセクション(GARMIN向け: モノトーン基調+商品ショーケース) */
.hero {
    position: relative;
    overflow: hidden;
    box-sizing: border-box;
    background-color: var(--color-ink);
    padding: var(--space-80) var(--space-24);
    margin-bottom: var(--space-40);
}

.hero-inner {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: minmax(0, 0.95fr) minmax(320px, 1.05fr);
    align-items: center;
    gap: clamp(32px, 6vw, 80px);
    width: min(88%, 1280px);
    margin: 0 auto;
}

.hero-content {
    max-width: 560px;
}

.hero-eyebrow {
    display: inline-block;
    margin: 0 0 var(--space-24);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.28em;
    color: rgba(255, 255, 255, 0.6);
}

.hero-period {
    display: inline-block;
    margin: 0 0 var(--space-24);
    padding: var(--space-8) var(--space-16);
    border: 1px solid rgba(255, 255, 255, 0.4);
    border-radius: 999px;
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    color: #fff;
}

.hero-title {
    margin: 0;
    font-family: var(--font-serif);
    font-size: clamp(2.1rem, 5vw, 3.4rem);
    font-weight: 700;
    line-height: 1.3;
    color: #fff;
}

.hero-rule {
    width: 48px;
    height: 2px;
    margin: var(--space-24) 0;
    background-color: #fff;
}

.hero-lead {
    margin: 0;
    color: rgba(255, 255, 255, 0.78);
    font-size: 1rem;
    line-height: 1.9;
}

.hero-lead strong {
    color: #fff;
    font-weight: 700;
    border-bottom: 2px solid #fff;
}

.hero-showcase {
    position: relative;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-16);
    margin: 0;
}

.hero-showcase-main {
    grid-column: 1 / -1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-32);
    box-sizing: border-box;
    background-color: #fff;
    border-radius: var(--radius-md);
}

.hero-showcase-main img {
    width: 100%;
    max-width: 260px;
    height: auto;
    object-fit: contain;
}

.hero-product {
    display: block;
    width: 100%;
    height: auto;
    padding: var(--space-24);
    box-sizing: border-box;
    background-color: #fff;
    border-radius: var(--radius-md);
    object-fit: contain;
}

.hero-price-callout {
    grid-column: 1 / -1;
    padding: var(--space-16);
    background-color: #fff;
    color: var(--color-ink);
    border-radius: var(--radius-md);
    text-align: center;
}

.hero-price-callout span {
    display: block;
    margin-bottom: 4px;
    font-size: 0.72rem;
    font-weight: 700;
    color: var(--color-muted);
}

.hero-price-callout strong {
    display: block;
    font-family: var(--font-serif);
    font-size: clamp(1.6rem, 3vw, 2.2rem);
    line-height: 1;
    color: var(--color-accent);
}

#product-container {
    max-width: none;
    margin: 0 auto;
    padding: 0;
}

.product-section {
    padding: var(--space-64) var(--space-24);
}

.product-section:nth-child(odd) {
    background-color: #ffffff;
}

.product-section:nth-child(even) {
    background-color: rgba(221, 221, 221, 0.2);
}

.product-section__inner {
    max-width: 1100px;
    margin: 0 auto;
}

.group-heading {
    margin: 0;
    padding-bottom: var(--space-16);
    border-bottom: 2px solid var(--color-ink);
    font-family: var(--font-serif);
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--color-ink);
    scroll-margin-top: var(--space-80);
}

.subgroup-heading {
    margin: var(--space-40) 0 0;
    font-family: var(--font-serif);
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--color-muted);
}

.product-group {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(min(190px, 100%), 1fr));
    gap: 28px 24px;
    margin-top: var(--space-24);
}

.product-card {
    position: relative;
    text-align: left;
    display: flex;
    flex-direction: column;
    min-width: 0;
    transition: transform 0.25s ease;
}

.product-card-link {
    position: absolute;
    inset: 0;
    z-index: 1;
    border-radius: inherit;
}

.product-card:hover {
    transform: translateY(-3px);
}

.product-media {
    position: relative;
    display: grid;
    place-items: center;
    aspect-ratio: 1;
    margin-bottom: var(--space-16);
    padding: var(--space-24);
    border-radius: var(--radius-lg);
    background-color: #fff;
    overflow: hidden;
}

.product-card img {
    max-width: 100%;
    max-height: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
}

.tag-row {
    position: absolute;
    top: 8px;
    left: 8px;
    display: flex;
    gap: 6px;
}

.tag {
    padding: var(--space-8) var(--space-8);
    border-radius: 4px;
    font-size: 0.65rem;
    font-weight: 700;
    color: #fff;
    letter-spacing: 0.02em;
    white-space: nowrap;
}

.tag--limited {
    background-color: var(--color-ink);
}

.tag--popular {
    box-sizing: border-box;
    background-color: #fff;
    color: var(--color-ink);
    border: 1px solid var(--color-ink);
}

.product-card .product-name {
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
    overflow: hidden;
    font-weight: 700;
    margin: 0 0 var(--space-8);
    font-size: 0.9rem;
    line-height: 1.6;
    min-height: calc(0.9rem * 1.4 * 2);
}

.product-card .product-price {
    margin: 0 0 6px;
    color: var(--color-muted);
    font-size: 0.78rem;
    text-decoration: line-through;
    text-decoration-thickness: 1px;
    text-decoration-color: rgba(107, 107, 107, 0.7);
}

.price-panel {
    display: grid;
    gap: 4px;
    margin-bottom: var(--space-16);
}

.payment-price {
    padding: 0;
    text-align: left;
}

.payment-price--other {
    background: none;
    box-shadow: none;
}

.payment-price__header {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    gap: 6px;
    margin-bottom: 2px;
}

.payment-price__label {
    color: var(--color-muted);
    font-size: 0.7rem;
    font-weight: 700;
}

.payment-price--other .payment-price__label {
    color: var(--color-gold);
}

.payment-discount {
    padding: 0;
    background-color: transparent;
    color: var(--color-gold);
    font-size: 0.7rem;
    font-weight: 700;
    line-height: 1;
    white-space: nowrap;
}

.payment-price__amount {
    margin: 0;
    color: var(--color-ink);
    font-size: 0.95rem;
    font-weight: 700;
    line-height: 1.3;
}

.payment-price__installment {
    margin: 2px 0 0;
    color: var(--color-muted);
    font-size: 0.7rem;
    font-weight: 700;
    line-height: 1.4;
}

.payment-price--other .payment-price__amount {
    color: var(--color-gold);
    font-size: 1.02rem;
}

.cta-button {
    position: relative;
    z-index: 2;
    display: inline-block;
    margin: auto 0 0;
    padding: 10px var(--space-16);
    border: 1px solid var(--color-ink);
    background-color: var(--color-ink);
    color: #fff;
    text-align: center;
    text-decoration: none;
    font-size: 0.78rem;
    font-weight: 700;
    border-radius: var(--radius-md);
    box-shadow: none;
    transition: background-color 0.3s, color 0.3s, transform 0.3s;
}

.cta-button:hover {
    background-color: #fff;
    color: var(--color-ink);
    transform: translateY(-2px);
}

.special-offer-summary {
    max-width: 800px;
    margin: 0 auto var(--space-40);
    padding: var(--space-32) var(--space-32);
    border: 1px solid var(--color-border);
    background-color: var(--color-surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
}

.special-offer-summary .benefits-block h4 {
    text-align: center;
    margin-top: 0;
    margin-bottom: var(--space-24);
    color: var(--color-ink);
    font-family: var(--font-serif);
    font-size: 1.35rem;
    font-weight: 600;
}

.benefit-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin: 0 0 var(--space-16);
}

.benefit-card {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: var(--space-32) var(--space-24) var(--space-24);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background-color: var(--color-bg-soft);
    text-align: center;
}

.benefit-card--other {
    border-color: var(--color-ink);
    background-color: var(--color-ink);
    box-shadow: none;
}

.benefit-card--other .benefit-title,
.benefit-card--other .benefit-num,
.benefit-card--other .benefit-unit,
.benefit-card--other .benefit-desc {
    color: #fff;
}

.benefit-badge {
    position: absolute;
    top: -12px;
    padding: var(--space-8) var(--space-16);
    border-radius: 999px;
    font-size: 0.7rem;
    font-weight: 700;
    color: #fff;
    white-space: nowrap;
}

.benefit-card--other .benefit-badge {
    box-sizing: border-box;
    background-color: var(--color-surface);
    color: var(--color-ink);
    border: 1px solid var(--color-ink);
}

.benefit-card--loan .benefit-badge {
    box-sizing: border-box;
    background-color: var(--color-surface);
    color: var(--color-gold);
    border: 1px solid var(--color-gold);
}

.benefit-title {
    margin: var(--space-16) 0 0;
    font-size: 1rem;
    font-family: var(--font-serif);
    font-size: 1.08rem;
    font-weight: 600;
    color: var(--color-ink);
}

.benefit-price {
    margin: var(--space-8) 0;
}

.benefit-num {
    font-family: var(--font-serif);
    font-size: 2.8rem;
    font-weight: 700;
    color: var(--color-accent);
    line-height: 1;
}

.benefit-unit {
    margin-left: var(--space-8);
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-accent);
}

.benefit-desc {
    margin: 0;
    font-size: 0.85rem;
    color: var(--color-muted);
    line-height: 1.6;
}

.benefit-plus {
    display: flex;
    align-items: center;
    gap: 6px;
    margin: var(--space-8) 0 0;
    font-size: 0.85rem;
    color: var(--color-ink);
    line-height: 1.5;
}

.benefit-plus-icon {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-accent);
}

.benefit-link {
    margin-top: var(--space-16);
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--color-gold);
    text-decoration: none;
    border-bottom: 1px solid var(--color-gold);
}

.benefit-link:hover {
    color: var(--color-accent-dark);
    border-color: var(--color-accent-dark);
}

.benefit-note {
    margin: 0;
    text-align: center;
    font-size: 0.8rem;
    color: var(--color-muted);
}

.inquiry-guide {
    max-width: 640px;
    margin: var(--space-16) auto var(--space-24);
    font-size: 0.85rem;
    color: var(--color-muted);
    text-align: center;
    line-height: 1.7;
}

.inquiry-guide strong {
    color: var(--color-ink);
}

.special-offer-summary .closing-notes {
    text-align: center;
    font-size: 0.9rem;
    color: var(--color-ink);
    margin: 0;
    line-height: 1.6;
}

/* 豪華ノベルティ案内 */
.novelty-promo {
    max-width: 800px;
    margin: 0 auto var(--space-40);
    padding: var(--space-32) var(--space-32);
    border: 1px solid var(--color-gold);
    background-color: var(--color-surface);
    border-radius: var(--radius-lg);
    text-align: center;
}

.novelty-promo-badge {
    display: inline-block;
    margin: 0 0 var(--space-16);
    padding: var(--space-8) var(--space-16);
    border-radius: 999px;
    background-color: var(--color-ink);
    color: #fff;
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.08em;
}

.novelty-promo-title {
    margin: 0 0 var(--space-16);
    font-family: var(--font-serif);
    font-size: 1.35rem;
    font-weight: 600;
    color: var(--color-ink);
}

.novelty-promo-text {
    margin: 0;
    color: var(--color-muted);
    font-size: 0.9rem;
    line-height: 1.8;
}

.novelty-promo-banner {
    display: block;
    width: 100%;
    height: auto;
    margin: 0 0 var(--space-24);
    border-radius: var(--radius-md);
}

.novelty-promo-list {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-8) var(--space-16);
    margin: var(--space-16) 0 0;
    padding: 0;
    list-style: none;
}

.novelty-promo-list li {
    padding: var(--space-8) var(--space-16);
    border: 1px solid var(--color-border);
    border-radius: 999px;
    background-color: var(--color-bg-soft);
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--color-ink);
}

.novelty-promo-note {
    margin: var(--space-16) 0 0;
    font-size: 0.78rem;
    color: var(--color-muted);
}

/* 注意事項 */
.notes {
    max-width: 800px;
    margin: var(--space-64) auto 0;
    padding: 0 var(--space-24);
}

.notes-title {
    margin: 0 0 var(--space-16);
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-ink);
}

.notes-list {
    margin: 0;
    padding-left: 1.2em;
    color: var(--color-muted);
    font-size: 0.8rem;
    line-height: 1.9;
}

.notes-list li {
    margin-bottom: var(--space-8);
}

/* 公式通販サイト案内 */
.official-promo {
    margin-top: var(--space-64);
    padding: var(--space-48) var(--space-24);
    background-color: var(--color-bg-soft);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
    text-align: center;
}

.official-promo-inner {
    max-width: 640px;
    margin: 0 auto;
}

.official-promo-title {
    margin: 0 0 var(--space-16);
    font-family: var(--font-serif);
    font-size: 1.45rem;
    font-weight: 600;
    color: var(--color-ink);
}

.official-promo-text {
    margin: 0 0 var(--space-24);
    color: var(--color-muted);
    font-size: 0.9rem;
    line-height: 1.8;
}

.official-promo-button {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: var(--space-16) var(--space-32);
    border-radius: var(--radius-md);
    background-color: var(--color-ink);
    color: #fff;
    font-weight: 700;
    font-size: 0.9rem;
    text-decoration: none;
    transition: background-color 0.3s, transform 0.3s;
}

.official-promo-button:hover {
    background-color: var(--color-accent);
    transform: translateY(-2px);
}

/* 案内セクションが連続する場合は余白の二重発生を防ぐ */
.official-promo + .official-promo {
    margin-top: 0;
}

/* グランドセイコー: コーポレートカラー(#000040)を基調にしたデザイン */
.official-promo--grandseiko {
    background-color: #000040;
    border-top: none;
    border-bottom: none;
}

.official-promo--grandseiko .official-promo-title {
    color: #fff;
}

.official-promo--grandseiko .official-promo-text {
    color: rgba(255, 255, 255, 0.75);
}

.official-promo--grandseiko .official-promo-button {
    background-color: #fff;
    color: #000040;
}

.official-promo--grandseiko .official-promo-button:hover {
    background-color: rgba(255, 255, 255, 0.85);
}

.external-icon {
    font-size: 0.9em;
}

/* フッター */
.footer {
    margin-top: 0;
    padding: var(--space-48) var(--space-24) var(--space-24);
    background-color: var(--color-ink);
    color: #cccccc;
}

.footer-inner {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    max-width: 1000px;
    margin: 0 auto;
}

.footer-column {
    min-width: 0;
}

.footer-heading {
    margin: 0 0 var(--space-16);
    font-size: 0.95rem;
    font-weight: 700;
    color: #fff;
}

.footer-links {
    list-style: none;
    margin: 0;
    padding: 0;
}

.footer-links li {
    margin-bottom: var(--space-16);
}

.footer-links a {
    color: #cccccc;
    text-decoration: none;
    font-size: 0.82rem;
    line-height: 1.6;
}

.footer-links a:hover {
    color: #ffffff;
    text-decoration: underline;
}

.footer-copyright {
    max-width: 1000px;
    margin: var(--space-40) auto 0;
    padding-top: var(--space-24);
    border-top: 1px solid rgba(255, 255, 255, 0.12);
    text-align: center;
    font-size: 0.75rem;
    color: #999999;
    line-height: 1.8;
}

.footer-address {
    font-style: normal;
    margin-bottom: var(--space-8);
}

.footer-address p {
    margin: 0;
}

.footer-copyright a {
    color: #999999;
}

.footer-copyright a:hover {
    color: #ffffff;
}

/* Responsive layout for mobile */
@media (max-width: 768px) {
    .site-logo-img {
        height: 22px;
        max-width: 130px;
    }

    .hero {
        padding: var(--space-40) var(--space-16);
    }

    .hero-inner {
        grid-template-columns: 1fr;
        gap: var(--space-32);
    }

    .hero-title {
        font-size: clamp(1.6rem, 7.8vw, 2.2rem);
        letter-spacing: 0;
    }

    .hero-showcase-main img {
        max-width: 200px;
    }

    .benefit-grid {
        grid-template-columns: 1fr;
        gap: 24px 0;
    }

    .benefit-card {
        padding-top: var(--space-24);
    }

    .product-group {
        grid-template-columns: none;
        grid-auto-flow: column;
        grid-auto-columns: min(78vw, 280px);
        gap: 14px;
        overflow-x: auto;
        overscroll-behavior-inline: contain;
        scroll-snap-type: inline mandatory;
        scroll-padding-inline: var(--space-16);
        padding-bottom: var(--space-8);
        scrollbar-width: none;
        -webkit-overflow-scrolling: touch;
    }

    .product-group::-webkit-scrollbar {
        display: none;
    }

    .product-card {
        scroll-snap-align: start;
    }

    .product-media {
        padding: var(--space-16);
    }

    .tag-row {
        top: 0;
        left: 0;
    }

    .payment-price__amount,
    .payment-price--other .payment-price__amount {
        font-size: 0.95rem;
    }

    .product-section {
        padding: var(--space-40) var(--space-16);
    }

    .cta-button {
        font-size: 0.78rem;
        padding: var(--space-8) var(--space-16);
    }

    .special-offer-summary {
        margin-left: var(--space-16);
        margin-right: var(--space-16);
        padding: var(--space-24) var(--space-16);
        margin-bottom: var(--space-24);
    }

    .novelty-promo {
        margin-left: var(--space-16);
        margin-right: var(--space-16);
        padding: var(--space-24) var(--space-16);
        margin-bottom: var(--space-24);
    }

    .notes {
        margin-top: var(--space-40);
    }

    .official-promo {
        margin-top: var(--space-40);
        padding: var(--space-40) var(--space-16);
    }

    .footer-inner {
        grid-template-columns: 1fr;
        gap: 28px;
    }
}

/* 商品詳細ページへの遷移確認モーダル */
.modal {
    position: fixed;
    inset: 0;
    z-index: 200;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-24);
    background-color: rgba(43, 36, 32, 0.55);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.25s ease, visibility 0.25s ease;
}

.modal.is-open {
    opacity: 1;
    visibility: visible;
}

.modal-container {
    position: relative;
    width: 100%;
    max-width: 440px;
    padding: var(--space-32) var(--space-24) var(--space-24);
    background-color: var(--color-bg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card-hover);
    text-align: center;
    transform: translateY(12px);
    transition: transform 0.25s ease;
}

.modal.is-open .modal-container {
    transform: translateY(0);
}

.modal-close-icon {
    position: absolute;
    top: 12px;
    right: 12px;
    width: 32px;
    height: 32px;
    border: none;
    background: none;
    font-size: 1.5rem;
    line-height: 1;
    color: var(--color-muted);
    cursor: pointer;
}

.modal-title {
    margin: 0 0 var(--space-16);
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--color-ink);
}

.modal-content p {
    margin: 0 0 var(--space-16);
    font-size: 0.9rem;
    color: var(--color-ink);
    line-height: 1.7;
    text-align: left;
}

.modal-content p:last-child {
    margin-bottom: 0;
}

.modal-content strong {
    color: var(--color-accent);
}

.modal-footer {
    display: flex;
    gap: 10px;
    margin-top: var(--space-24);
}

.modal-btn {
    flex: 1;
    padding: var(--space-16);
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    font-weight: 700;
    cursor: pointer;
    transition: background-color 0.25s ease, color 0.25s ease;
}

.modal-btn--cancel {
    background-color: var(--color-bg-soft);
    color: var(--color-ink);
    border: 1px solid var(--color-border);
}

.modal-btn--cancel:hover {
    background-color: var(--color-border);
}

.modal-btn--confirm {
    background-color: var(--color-accent);
    color: #fff;
}

.modal-btn--confirm:hover {
    background-color: var(--color-accent-dark);
}

/* ページトップに戻るボタン */
.back-to-top {
    position: fixed;
    right: var(--space-24);
    bottom: var(--space-24);
    z-index: 90;
    width: 48px;
    height: 48px;
    padding: 0;
    border: none;
    border-radius: 50%;
    background-color: var(--color-accent);
    color: #fff;
    font-size: 1.2rem;
    line-height: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-card-hover), 0 0 18px 2px rgba(255, 255, 255, 0.4);
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(var(--space-8));
    transition: opacity 0.25s ease, visibility 0.25s ease, transform 0.25s ease, background-color 0.25s ease;
}

.back-to-top.is-visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background-color: var(--color-accent-dark);
}

@media (max-width: 768px) {
    .back-to-top {
        right: var(--space-16);
        bottom: var(--space-16);
        width: 44px;
        height: 44px;
    }
}