/* ----- 基本設定 ----- */
body { margin: 0; font-family: "Helvetica Neue", Arial, "Hiragino Kaku Gothic ProN", "Hiragino Sans", Meiryo, sans-serif; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; margin: 0; padding: 0; }
/* ----- ヘッダー ----- */
.header { position: fixed; top: 0; left: 0; width: 100%; z-index: 100; background-color: transparent; color: #ffffff; transition: background-color 0.4s ease, color 0.4s ease; }
.header.scrolled { background-color: #ffffff; color: #333333; border-bottom: 1px solid #e0e0e0; }
.header__inner { display: flex; justify-content: space-between; align-items: center; max-width: 1400px; margin: 0 auto; padding: 20px 40px; box-sizing: border-box; }
.header__logo { margin: 0; font-size: clamp(0.9rem, 1.5vw, 1.2rem); font-weight: 500; letter-spacing: 0.1em; display: flex; align-items: center; }
.header__logo img { max-width: 150px; vertical-align: middle; }
.header__nav ul { display: flex; gap: 32px; }
.header__nav a { font-size: 0.9rem; }
.header__right-content { display: flex; align-items: center; gap: 15px; }
.header__cart svg { display: block; }
.hamburger { display: none; }
/* ----- ファーストビュー (hero) ----- */
.hero { position: relative; height: 100vh; display: flex; justify-content: center; align-items: center; color: #ffffff; text-align: center; overflow: hidden; }
.hero__video-wrapper { position: absolute; top: 0; left: 0; width: 100%; height: 100%; z-index: -2; }
.hero__video { width: 100%; height: 100%; object-fit: cover; }
.hero__overlay { position: absolute; top: 0; left: 0; width: 100%; height: 100%; background-color: rgba(0, 0, 0, 0.4); z-index: -1; }
.hero__content { position: relative; }
.hero__title {
    font-size: clamp(1.8rem, 5vw, 2.8rem); 
    font-weight: normal; 
    margin: 0 0 10px 0; 
    font-family: "游明朝体", "Yu Mincho", YuMincho, "Hiragino Mincho ProN", serif; 
}
.hero__subtitle { margin: 0; font-size: 1rem; letter-spacing: 0.2em; }
/* ----- 共通コンポーネント ----- */
.container { max-width: 1200px; margin: 0 auto; padding: 0 40px; box-sizing: border-box; }
.section-header { text-align: center; margin-bottom: 50px; }
.section-title { font-size: 1.8rem; font-family: "游明朝体", "Yu Mincho", YuMincho, "Hiragino Mincho ProN", serif; font-weight: 500; margin: 0 0 10px 0; }
.section-title--light { color: #ffffff; }
.section-subtitle { margin: 0; font-size: 1rem; color: #888; letter-spacing: 0.1em; }
.section-subtitle--light { color: rgba(255,255,255,0.9); }
.btn { display: inline-block; padding: 12px 40px; background-color: #333; color: #fff; font-size: 0.9rem; letter-spacing: 0.1em; border: 1px solid #333; transition: background-color 0.3s ease, color 0.3s ease; }
.btn:hover { background-color: #fff; color: #333; }
.section-divider { border: none; height: 1px; background-color: #e0e0e0; max-width: 1200px; margin: 0 auto; }
/* ----- テキストセクション ----- */
.text-section { padding: 100px 0; }
.text-section.bg-gray { background-color: #f7f7f7; }
.text-section .container { max-width: 800px; text-align: center; }
.text-section__body { margin: 0; line-height: 2; color: #555; }
/* ----- ギフト体験バナーセクション ----- */
.experience-banner { position: relative; padding: 100px 0; color: #fff; }
.experience-banner__bg-image { position: absolute; top: 0; left: 0; width: 100%; height: 100%; z-index: -2; }
.experience-banner__bg-image img { width: 100%; height: 100%; object-fit: cover; }
.experience-banner__overlay { position: absolute; top: 0; left: 0; width: 100%; height: 100%; background-color: rgba(0, 0, 0, 0.5); z-index: -1; }
.experience-banner__content { position: relative; z-index: 1; }
.experience-banner__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; }
.experience-banner__item { text-align: center; }
.experience-banner__title { font-size: 1.3rem; font-family: "游明朝体", "Yu Mincho", YuMincho, "Hiragino Mincho ProN", serif; font-weight: 500; margin: 0 0 15px 0; }
.experience-banner__description { font-size: 0.9rem; line-height: 1.7; margin: 0; opacity: 0.9; }
/* ----- 商品一覧セクション ----- */
.products { padding: 100px 0; background-color: #ffffff; }
.product-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.product-item { position: relative; overflow: hidden; display: block; color: #ffffff; }
.product-item__image-wrapper img { width: 100%; height: auto; display: block; aspect-ratio: 1 / 1; object-fit: cover; transition: transform 0.4s ease; }
.product-item:hover .product-item__image-wrapper img { transform: scale(1.05); }
.product-item__info { position: absolute; top: 0; left: 0; width: 100%; height: 100%; background-color: rgba(0, 0, 0, 0.4); display: flex; flex-direction: column; justify-content: center; align-items: center; opacity: 0; transition: opacity 0.4s ease; }
.product-item:hover .product-item__info { opacity: 1; }
.product-item__name { margin: 0 0 8px 0; font-size: 1rem; font-weight: 500; }
.product-item__price { margin: 0; font-size: 0.9rem; }
/* ----- Feature Slider Section (Swiper) ----- */
.feature-slider { padding: 100px 0; background-color: #f7f7f7; }
.feature-slider .container { position: relative; }
.swiper-container-products { width: 100%; overflow: hidden; position: relative; padding-bottom: 30px; }
.swiper-slide { width: 320px; box-sizing: border-box; }
.slider-item { width: 100%; background-color: #fff; box-shadow: 0 4px 15px rgba(0,0,0,0.05); }
.slider-item__image img { width: 100%; display: block; aspect-ratio: 3 / 4; object-fit: cover; }
.slider-item__content { padding: 25px; }
.slider-item__title { font-size: 1.2rem; font-weight: 500; margin: 0 0 15px 0; }
.slider-item__description { font-size: 0.9rem; line-height: 1.7; margin: 0; color: #555; }
.swiper-button-prev, .swiper-button-next { width: 44px; height: 44px; background-color: rgba(255, 255, 255, 0.8); border-radius: 50%; color: #333; transition: all 0.2s ease; top: 40%; }
.swiper-button-prev:hover, .swiper-button-next:hover { background-color: #fff; transform: scale(1.05); }
.swiper-button-prev::after, .swiper-button-next::after { font-size: 18px; font-weight: bold; }
.swiper-button-prev { left: 30px; }
.swiper-button-next { right: 30px; }
.swiper-button-disabled { opacity: 0; pointer-events: none; }
.swiper-scrollbar { bottom: 5px; left: 50%; transform: translateX(-50%); width: 80%; height: 4px; background: #e0e0e0; }
.swiper-scrollbar-drag { background: #555; }
/* ----- 実績セクション (1カラム) ----- */
.achievements-section { padding: 100px 0; background-color: #ffffff; }
.achievements-section .container { max-width: 900px; text-align: center; }
.achievements-section__image { margin-bottom: 40px; }
.achievements-section__image img { width: 100%; display: block; }
.achievements-section__body { margin: 0 auto; max-width: 600px; line-height: 2; color: #555; }
/* ----- Image + Text Section ----- */
.image-text-section { padding: 100px 0; background-color: #ffffff; }
.image-text-section.bg-gray { background-color: #f7f7f7; }
.image-text-section .container { display: flex; align-items: center; gap: 60px; }
.image-text-section__image { width: 50%; flex-shrink: 0; }
.image-text-section__image img { width: 100%; display: block; }
.image-text-section__content { width: 50%; }
.image-text-section__title { font-size: 1.8rem; font-family: "游明朝体", "Yu Mincho", YuMincho, "Hiragino Mincho ProN", serif; font-weight: 500; margin: 0 0 30px 0; }
.image-text-section__body { margin: 0; line-height: 2; color: #555; }
.image-text-section.reverse .container { flex-direction: row-reverse; }
/* ----- お客様の声セクション ----- */
.customer-reviews { padding: 100px 0; background-color: #f7f7f7; }
.reviews-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.review-item { background-color: #fff; padding: 30px; box-shadow: 0 4px 15px rgba(0,0,0,0.05); }
.review-item__text { margin: 0 0 20px 0; line-height: 1.8; color: #333; }
.review-item__author { margin: 0; text-align: right; font-size: 0.9rem; color: #555; }
/* ----- ギフトBOXセクション ----- */
.gift-box-section { padding: 100px 0; }
.gift-box-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.gift-box-grid .gift-item { background-color: #fff; padding: 30px; box-shadow: 0 4px 15px rgba(0,0,0,0.05); box-sizing: border-box; }
/* ----- 共通ギフトアイテム ----- */
.gift-item { color: #333; text-align: center; }
.gift-item a:hover h3 { color: #888; }
.gift-item__image { margin-bottom: 15px; }
.gift-item__image img { width: 100%; display: block; aspect-ratio: 1 / 1; object-fit: cover; }
.gift-item__name { margin: 0 0 5px 0; font-size: 0.9rem; font-weight: 500; transition: color 0.3s ease; }
.gift-item__description { font-size: 0.8rem; color: #888; margin: 0 0 10px 0; }
.gift-item__price { margin: 0; font-size: 0.9rem; color: #555; }
.btn-add-to-cart { display: block; width: 100%; padding: 12px 10px; margin-top: 15px; background-color: #333; color: #fff; text-align: center; font-size: 0.9rem; transition: opacity 0.3s ease; }
.btn-add-to-cart:hover { opacity: 0.8; }
/* ----- コンセプトセクション ----- */
.concept { display: flex; background-color: #f7f7f7; }
.concept__image { width: 50%; line-height: 0; }
.concept__image img { width: 100%; height: 100%; object-fit: cover; }
.concept__text-wrapper { width: 50%; display: flex; justify-content: center; align-items: center; padding: 80px 40px; box-sizing: border-box; }
.concept__text-inner { display: flex; flex-direction: row-reverse; justify-content: center; align-items: center; gap: 40px; }
.vertical-text { writing-mode: vertical-rl; text-orientation: mixed; line-height: 2.2; }
.concept__title { font-family: "游明朝体", "Yu Mincho", YuMincho, "Hiragino Mincho ProN", serif; font-size: 2.2rem; font-weight: 500; color: #333; margin: 0; height: 300px; letter-spacing: 0.1em; }
.concept__body-container { height: 300px; }
.concept__body { font-family: "游明朝体", "Yu Mincho", YuMincho, "Hiragino Mincho ProN", serif; font-size: 1rem; color: #555; margin: 0; }
.concept__button-wrapper { writing-mode: horizontal-tb; align-self: flex-end; padding-top: 40px; }
/* ----- FAQセクション ----- */
.faq { padding: 100px 0; }
.faq-list { border-top: 1px solid #e0e0e0; max-width: 800px; margin: 0 auto; }
.faq-item { border-bottom: 1px solid #e0e0e0; }
.faq-question { display: flex; align-items: center; padding: 20px 0; cursor: pointer; position: relative; }
.faq-q-mark { font-size: 1.2rem; font-weight: bold; color: #888; margin-right: 15px; }
.faq-question p { margin: 0; font-weight: 500; }
.faq-icon { width: 12px; height: 12px; margin-left: auto; position: relative; }
.faq-icon::before, .faq-icon::after { content: ''; position: absolute; top: 50%; left: 50%; width: 100%; height: 2px; background-color: #888; transition: transform 0.3s ease; }
.faq-icon::before { transform: translate(-50%, -50%); }
.faq-icon::after { transform: translate(-50%, -50%) rotate(90deg); }
.faq-item.is-open .faq-icon::after { transform: translate(-50%, -50%) rotate(0deg); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.4s ease-out; }
.faq-answer p { margin: 0; padding: 0 0 30px 32px; line-height: 1.8; }
.faq-item.is-open .faq-answer { max-height: 200px; }
/* ----- フッター ----- */
.footer { background-color: #2c2c2c; color: #f0f0f0; padding: 60px 0 20px 0; }
.footer a { color: #f0f0f0; transition: color 0.3s ease; }
.footer a:hover { color: #a0a0a0; }
.footer__top { display: flex; justify-content: space-between; align-items: center; padding-bottom: 30px; border-bottom: 1px solid #444; }
.footer__logo { font-size: clamp(0.9rem, 2.5vw, 1.2rem); font-weight: 500; letter-spacing: 0.1em; display: flex; align-items: center;}
.footer__logo img { max-width: 150px; vertical-align: middle; }
.footer__sns { display: flex; gap: 20px; }
.footer__sns svg { width: 24px; height: 24px; fill: currentColor; }
.footer__main { display: flex; gap: 80px; padding: 40px 0; border-bottom: 1px solid #444; }
.footer__nav { display: flex; flex-direction: column; gap: 15px; font-size: 0.9rem; }
.footer__bottom { padding-top: 20px; text-align: center; }
.footer__copyright { font-size: 0.8rem; color: #a0a0a0; margin: 0; }
/* ----- スクロールアニメーション ----- */
.fade-in-up { opacity: 0; transform: translateY(30px); transition: opacity 0.8s ease-out, transform 0.8s ease-out; }
.fade-in-up.is-visible { opacity: 1; transform: translateY(0); }
/* ----- レスポンシブ対応 ----- */
@media (max-width: 960px) {
    .swiper-button-prev, .swiper-button-next { display: none; }
    .product-grid { grid-template-columns: repeat(2, 1fr); }
    .reviews-grid { grid-template-columns: 1fr; }
    .gift-box-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
    .container { padding: 0 20px; }
    .section-title { font-size: 1.5rem; margin-bottom: 30px; }
    .section-divider { margin: 0 20px; }
    .header__inner { padding: 15px 20px; }
    .header__nav { display: none; }
    .hamburger { display: block; width: 24px; height: 18px; background: none; border: none; cursor: pointer; padding: 0; position: relative; z-index: 101; }
    .hamburger span { display: block; width: 100%; height: 2px; background-color: currentColor; position: absolute; left: 0; transition: all 0.3s ease; }
    .hamburger span:nth-child(1) { top: 0; }
    .hamburger span:nth-child(2) { top: 50%; transform: translateY(-50%); }
    .hamburger span:nth-child(3) { bottom: 0; }
    .header__nav.is-active { display: flex; position: fixed; top: 0; left: 0; width: 100%; height: 100%; background-color: rgba(255, 255, 255, 0.95); color: #333; z-index: 100; justify-content: center; align-items: center; }
    .header__nav.is-active ul { flex-direction: column; text-align: center; gap: 40px; }
    .header__nav.is-active a { font-size: 1.5rem; }
    .hamburger.is-active span:nth-child(1) { top: 50%; transform: translateY(-50%) rotate(45deg); }
    .hamburger.is-active span:nth-child(2) { opacity: 0; }
    .hamburger.is-active span:nth-child(3) { bottom: 50%; transform: translateY(50%) rotate(-45deg); }
    .text-section { padding: 60px 0; }
    .text-section__title { font-size: 1.5rem; }
    .experience-banner { padding: 60px 20px; }
    .experience-banner__grid { grid-template-columns: 1fr; gap: 40px; }
    .experience-banner__title { font-size: 1.2rem; }
    .products { padding: 60px 0; }
    .product-grid { grid-template-columns: repeat(2, 1fr); gap: 15px; }
    .feature-slider { padding: 60px 0; }
    .feature-slider__title { font-size: 1.5rem; }
    .swiper-container-products { padding: 0 0 30px 0; margin: 0 -20px; }
    .swiper-slide { width: 280px; }
    .swiper-slide:first-child { margin-left: 20px; }
    .swiper-slide:last-child { margin-right: 20px; }
    .achievements-section { padding: 60px 0; }
    .image-text-section { padding: 60px 0; }
    .image-text-section .container,
    .image-text-section.reverse .container { flex-direction: column; gap: 30px; }
    .image-text-section__image, .image-text-section__content { width: 100%; }
    .image-text-section__title { font-size: 1.5rem; }
    .customer-reviews { padding: 60px 0; }
    .reviews-grid { grid-template-columns: 1fr; }
    .faq { padding: 60px 0; }
    .gift-box-section { padding: 60px 0; }
    .gift-box-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
    .concept { flex-direction: column; }
    .concept__image, .concept__text-wrapper { width: 100%; }
    .concept__text-wrapper { padding: 60px 20px; }
    .footer__main { flex-direction: column; gap: 30px; }
}