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

:root {
    --yellow-bg: #FFF9E6;
    --dark-navy: #212e46;
    --white: #ffffff;
    --text-dark: #363636;
    --text-light: #565656;
}

:root {
    --space-xs: 10px;
    --space-sm: 20px;
    --space-md: 40px;
    --space-lg: 60px;
    --space-xl: 80px;
    --space-xs-sp: 4px;
    --space-sm-sp: 8px;
    --space-md-sp: 12px;
    --space-lg-sp: 16px;
    --space-xl-sp: 20px;
}

body {
    font-family: 'Zen Maru Gothic', sans-serif;
    line-height: 1.8;
    color: var(--text-dark);
    overflow-x: hidden;
    width: 100%;
}

img {
    max-width: 100%;
    vertical-align: middle;
}

ul {
    list-style: none;
}

a {
    color: var(--white);
    text-decoration: none;
    font-size: 0.9rem;
    transition: opacity 0.3s ease;
}

.section-title {
    font-family: 'Tangerine';
    font-size: 3rem;
    font-weight: bold;
    margin-bottom: var(--space-md-sp);
    text-align: center;
}

.sp-br {
    display: block;
}

.pc-only {
    display: none;
}

.section-inner {
    padding-top: 60px;
    padding-bottom: 60px;
    padding-left: 20px;
    padding-right: 20px;
}

.section-inner:nth-child(2) {
    padding-top: 0;
}

/* メインビジュアル */
.hero {
    position: relative;
}

.product-title {
    font-size: 4.3rem;
    letter-spacing: 0.1rem;
    text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.6);
    position: absolute;
    right: 5%;
    bottom: 15%;
    z-index: 200;
}

.hero-content {
    min-height: 100vh;
    background-image: url('images/hero.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    object-fit: cover;
    position: relative;
    padding: 40px;
    mask-image: linear-gradient(to top, transparent 0%, black 20%);
    z-index: 100;
}

.hero-title {
    position: relative;
}

.hero-title img {
    width: 35%;
    position: absolute;
    top: 40px;
    left: 0;
}

/* 背景画像セクション */
.bg-image {
    background-image: url('images/bg-main.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    object-fit: cover;
    position: relative;
    color: #ffffff;
}

/* コンセプトセクション */
.concept {
    margin-top: 80px;
}

.concept-text {
    font-size: clamp(0.95rem, 3vw, 1.1rem);
    line-height: 2;
    text-align: center;
    /* color: var(--text-light); */
}

.feature-item {
    margin-bottom: var(--space-sm);
    text-align: center;
    background-image: url('images/bg-yl.png');
    background-size: 80%;
    background-repeat: no-repeat;
    background-position: center;
    object-fit: cover;
    width: 230px;
    min-height: 150px;
    margin-right: auto;
    margin-left: auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.feature-text {
    font-size: clamp(0.9rem, 3vw, 1rem);
    line-height: 1.9;
    padding: 0 10px;
}

/* 商品画像セクション */
.product-image {
    text-align: center;
}

.main-product-img {
    width: 60%;
    height: auto;
}

/* 発売日セクション */
.launch-date {
    text-align: center;
}

.launch-title {
    font-size: clamp(2rem, 7vw, 3rem);
    font-weight: 700;
    margin-bottom: var(--space-sm);
    line-height: 1.3;
}

.launch-text {
    font-size: clamp(0.9rem, 3vw, 1rem);
    margin-bottom: var(--space-sm);
}

.launch-date img {
    width: 40%;
}

.s-text {
    font-size: clamp(1rem, 3vw, 2rem);
}

/* 商品詳細セクション（薄い黄色背景） */
.yellow-bg {
    background-color: var(--yellow-bg);
}

.product-detail-item:first-child {
    padding-bottom: var(--space-md);
}

.product-detail-text {
    text-align: center;
}

.product-name {
    font-size: clamp(1rem, 3vw, 1.5rem);
    font-weight: 700;
    margin-bottom: 15px;
    color: var(--text-dark);
}

.product-detail-img {
    width: 60%;
    height: auto;
    border-radius: 8px;
    margin-bottom: 15px;
}

.product-description {
    font-size: clamp(0.9rem, 3vw, 1rem);
    line-height: 2;
    color: var(--text-light);
}

/* ダークネイビー背景セクション */
.dark-bg {
    background-color: var(--dark-navy);
    color: var(--white);
}

/* 新食感のひみつセクション */
.secret-text {
    font-size: clamp(0.95rem, 3vw, 1.1rem);
    line-height: 2;
    text-align: center;
    opacity: 0.9;
}

/* 動画セクション */
.video-wrapper {
    max-width: 600px;
    margin: 0 auto;
    position: relative;
}

.video-link {
    display: block;
    position: relative;
    border-radius: 8px;
    overflow: hidden;
    transition: transform 0.3s ease;
}

.video-link:hover {
    transform: scale(1.02);
}

.video-thumbnail {
    width: 100%;
    height: auto;
    display: block;
}

.play-button {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80px;
    height: 80px;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--dark-navy);
    transition: all 0.3s ease;
}

.video-link:hover .play-button {
    background: rgba(255, 255, 255, 1);
    transform: translate(-50%, -50%) scale(1.1);
}

/* SNSアイコン */
.social-icons {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-top: 40px;
}

.social-icon {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: var(--white);
    transition: all 0.3s ease;
}

.social-icon:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-5px);
}

.social-icon svg {
    width: 24px;
    height: 24px;
}

/* フッター */
.footer-nav {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 20px;
    margin-bottom: 30px;
}

.footer-link:hover {
    opacity: 0.7;
}

.copyright {
    text-align: center;
    font-size: 0.85rem;
    opacity: 0.7;
    margin-top: 20px;
}

/* スムーススクロール */
html {
    scroll-behavior: smooth;
}

/* アニメーション */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-content,
.section-inner {
    animation: fadeInUp 0.8s ease-out;
}

/* タブレットレイアウト */
@media (min-width: 768px) {
    .product-title {
        font-size: 8rem;
    }

    .hero-title img {
        width: 25%;
        top: 0;
    }

    .feature-content {
        display: flex;
        flex-direction: row;
        align-items: center;
        margin-left: 50px;
        margin-right: 50px;
    }

    .feature-item {
        width: 280px;
        min-height: 170px;
    }

    .main-product-img {
        width: 50%;
    }
}

/* PCレイアウト */
@media (min-width: 1025px) {
    body {
        background-image: url('images/bg-pattern.jpg');
        background-attachment: fixed;
        background-position: left center;
        background-size: cover;
        background-repeat: no-repeat;
        margin-left: 50%;
        width: calc(100vw / 2);
    }

    body::before {
        content: '';
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0, 0, 0, 0.3);
        z-index: -1;
    }

    .pc-only {
        display: block;
        width: calc(100vw / 2);
        position: fixed;
        left: 0;
        top: 50%;
        transform: translateY(-50%);
    }

    /* .bg-title {
        width: calc(100vw / 3);
        position: fixed;
        left: 0;
        top: 50%;
        transform: translateY(-50%);
        text-align: center;
    } */

    .bg-title {
        text-align: center;
        padding-bottom: var(--space-xl);
    }

    .bg-title img {
        width: 360px;
    }

    .bg-title p {
        font-family: 'Tangerine';
        font-size: 6rem;
        font-weight: bold;
        color: var(--white);
        letter-spacing: 2px;
    }

    .pc-nav nav {
        width: 80%;
        margin: 0 auto;
        display: flex;
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: center;
    }

    .pc-nav a {
        font-family: 'zen maru gothic';
        font-size: 1.2rem;
        margin: var(--space-xs) var(--space-sm);
    }

    .section-inner {
        padding-top: 80px;
        padding-bottom: 80px;
    }

    .section-title {
        font-size: 3.5rem;
        margin-bottom: var(--space-md);
    }

    .sp-br {
        display: none;
    }

    .product-title {
        font-size: 5rem;
    }

    .hero-title img {
        width: 25%;
        top: 0;
    }

    .product-detail-img {
        width: 45%;
        flex-shrink: 0;
    }

    .feature-content {
        margin-left: 10px;
        margin-right: 10px;
    }

    .feature-text {
        font-size: 0.9rem;
        padding: 0 5px;
        letter-spacing: 0.1em;
    }
}