/* ========================================
   カスタムプロパティ
======================================== */
:root {
    --bs-primary: #2B5F7F;
    /* 深い水色 */
    --bs-secondary: #87CEEB;
    /* スカイブルー */
    --bs-accent: #B8860B;
    /* 上品なゴールド */
    --bs-text: #333333;
    --bs-light: #F8FCFF;
    /* 極薄水色 */
    --bs-white: #FFFFFF;

    --bs-font-serif: "Noto Serif JP", "Yu Mincho", serif;
    --bs-font-sans: "Noto Sans JP", "Helvetica Neue", sans-serif;
    --bs-font-montserrat: "Montserrat", "Noto Sans JP", sans-serif;

    --bs-shadow-soft: 0 8px 32px rgba(43, 95, 127, 0.12);
    --bs-shadow-medium: 0 16px 48px rgba(43, 95, 127, 0.18);
    --bs-radius: 14px;
    --bs-transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ========================================
   基本設定
======================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: var(--bs-font-serif);
    color: var(--bs-text);
    line-height: 1.8;
    letter-spacing: 0.05em;
    background: linear-gradient(180deg, var(--bs-white) 0%, var(--bs-light) 100%);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

a {
    color: inherit;
    text-decoration: none;
    transition: var(--bs-transition);
}

/* ========================================
   レイアウト共通
======================================== */
.bs-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.bs-section {
    padding: 120px 0;
    position: relative;
}

/* ========================================
   ヘッダー
======================================== */
.bs-header {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 30px 0 30px;
    text-align: center;
    background: transparent;
}

.bs-header__inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 16px;
}

.bs-header__logo {
    font-family: var(--bs-font-montserrat);
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    letter-spacing: 0.32em;
    color: #1a1a1a;
    margin: 0;
    line-height: 1.1;
    text-indent: 0.32em;
    text-transform: uppercase;
}

.bs-header__tagline {
    font-family: var(--bs-font-serif);
    font-size: clamp(0.8rem, 2vw, 1rem);
    letter-spacing: 0.25em;
    color: #333333;
    margin: 0;
    opacity: 0.9;
    font-weight: 300;
    line-height: 1.4;
}

/* ========================================
   ファーストビュー
======================================== */
.bs-hero {
    height: 100vh;
    /* ★厳密な100vh固定 */
    min-height: 700px;
    /* ★極端に狭いPC用の安全策 */
    align-items: center;
    position: relative;
    padding: 0;
    /* ★固定paddingを削除 */
    background-color: #ffffff;
    overflow: hidden;
}

/* ★PC版コンテナ：中央配置設計 */
.bs-hero .bs-container {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    /* ★垂直中央配置 */
    padding-top: 80px;
    /* ★ヘッダー回避用（最小限） */
    padding-bottom: 20px;
    /* ★下部余白 */
}

/* 水面背景画像 + 可読性向上のオーバーレイ */
.bs-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        linear-gradient(90deg,
            rgba(255, 255, 255, 0.96) 0%,
            rgba(255, 255, 255, 0.85) 45%,
            rgba(255, 255, 255, 0.65) 100%),
        url('../images/hero-bg-water.jpg') center center / cover no-repeat;
    background-attachment: fixed;
    z-index: 0;
}

/* 下部の自然なフェードアウト */
.bs-hero::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 120px;
    background: linear-gradient(to top,
            rgba(255, 255, 255, 1) 0%,
            rgba(255, 255, 255, 0.8) 50%,
            transparent 100%);
    z-index: 1;
    pointer-events: none;
}

.bs-hero__inner {
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    gap: clamp(40px, 8vw, 100px);
    align-items: center;
    position: relative;
    z-index: 2;
}

/* 左カラム：テキストコンテンツ */
.bs-hero__content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

/* For Aphrodité */
.bs-hero__subtitle {
    font-family: var(--bs-font-montserrat);
    font-size: 0.9rem;
    letter-spacing: 0.2em;
    color: var(--bs-accent);
    margin-bottom: 20px;
    font-weight: 600;
    text-align: center;
    position: relative;
}

/* 装飾ライン追加 */
.bs-hero__subtitle::after {
    content: '';
    display: block;
    width: 40px;
    height: 1px;
    background: var(--bs-accent);
    margin: 8px auto 0;
    opacity: 0.7;
}

/* BISHOSUI メインタイトル */
.bs-hero__main-title {
    font-family: var(--bs-font-montserrat);
    font-size: clamp(3rem, 7vw, 4.5rem);
    font-weight: 700;
    background: linear-gradient(135deg,
            #1a1a1a 0%,
            var(--bs-primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 0.28em;
    line-height: 1.1;
    margin-bottom: 20px;
    text-indent: 0.28em;
    text-transform: uppercase;
    text-align: center;
    text-shadow: 2px 2px 4px rgba(43, 95, 127, 0.1);
}

/* キャッチコピー */
.bs-hero__catch {
    font-family: var(--bs-font-serif);
    font-size: clamp(0.95rem, 2.2vw, 1.15rem);
    color: var(--bs-white);
    /* ★白文字に変更 */
    letter-spacing: 0.08em;
    margin-bottom: 30px;
    line-height: 1.5;
    font-weight: 500;
    text-align: center;

    /* ★黒ザブトン実装 */
    background: linear-gradient(135deg,
            rgba(0, 0, 0, 0.92) 0%,
            rgba(26, 26, 26, 0.88) 100%);
    padding: 12px 22px;
    /* ★適度なザブトン感 */


    display: inline-block;

    /* ★微細な立体感 */
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* 本文エリア */
.bs-hero__body-text {
    margin-bottom: 0;
    text-align: center;
    max-width: 100%;
    /* ★幅制約緩和 */
    margin-left: 0;
    margin-right: 0;

    /* ★改行制御の核心設定 */
    word-break: keep-all;
    /* 単語途中の改行防止 */
    overflow-wrap: break-word;
    /* 長い単語は適切に処理 */
    white-space: normal;
    /* 自然な改行許可 */
}

/* 本文1段目（太字） */
.bs-hero__text-primary {
    font-size: clamp(1rem, 1.95vw, 1.05rem);
    /* ★0.9rem → 1rem（16px最小） */
    line-height: 1.8;
    color: var(--bs-primary);
    font-weight: 600;
    letter-spacing: 0.05em;
    margin-bottom: 0.5em;
}

/* 本文1段目・2段目共通 */
.bs-hero__text-primary,
.bs-hero__text-secondary {
    word-break: keep-all;
    overflow-wrap: break-word;
    white-space: normal;
}

/* 2つ目のprimaryの後に余白を追加 */
.bs-hero__text-primary:nth-of-type(2) {
    margin-bottom: 1.6em;
}

/* 本文2段目（通常） */
.bs-hero__text-secondary {
    font-size: clamp(1rem, 1.75vw, 1.05rem);
    /* ★0.82rem → 1rem（16px最小） */
    line-height: 1.9;
    color: #333333;
    font-weight: 400;
    letter-spacing: 0.05em;
    margin-bottom: 0;
    /* ★行数制限完全解除 */
    display: block;
    -webkit-line-clamp: unset;
    -webkit-box-orient: unset;
}

/* 右カラム：ビジュアルエリア */
.bs-hero__visual {
    position: relative;
    min-height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.bs-hero__image-main {
    position: relative;
    z-index: 3;
    max-width: 400px;
    width: 100%;
    border-radius: 24px;
    overflow: hidden;
    background: transparent;
    border: none;
    box-shadow: none;
    padding: 0;
    margin: 0;
    transform: translateX(-8%);
}

.bs-hero__image-main img {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
    margin: 0;
    padding: 0;
    border-radius: 24px;
}

.bs-hero__image-product {
    position: absolute;
    right: -20px;
    bottom: -40px;
    z-index: 4;
    width: 35%;
    background: transparent;
    border: none;
    box-shadow: none;
    backdrop-filter: none;
    border-radius: 0;
    padding: 0;
    margin: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.bs-hero__image-product img {
    width: 100%;
    height: auto;
    display: block;
    object-fit: contain;
    animation: gentle-float 8s ease-in-out infinite;
}

@keyframes gentle-float {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
    }

    50% {
        transform: translateY(-15px) rotate(2deg);
    }
}

.bs-hero__badge {
    position: absolute;
    left: -40px;
    top: 15%;
    z-index: 5;
    width: 140px;
    height: 140px;
    border-radius: 50%;
    background: radial-gradient(circle at 30% 30%,
            rgba(255, 255, 255, 1) 0%,
            rgba(248, 252, 255, 0.98) 50%,
            rgba(240, 248, 253, 0.95) 100%);
    border: 1.5px solid rgba(43, 95, 127, 0.18);
    box-shadow:
        0 20px 50px rgba(43, 95, 127, 0.15),
        0 8px 24px rgba(43, 95, 127, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 0;
}

.bs-hero__badge p {
    font-size: 0.8rem;
    line-height: 1.6;
    letter-spacing: 0.1em;
    color: var(--bs-primary);
    margin: 0;
    font-weight: 500;
    padding: 20px;
}

/* 背景装飾 */
.bs-hero__bg-decoration {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(circle at 15% 25%, rgba(135, 206, 235, 0.12) 0%, transparent 50%),
        radial-gradient(circle at 85% 75%, rgba(43, 95, 127, 0.08) 0%, transparent 60%);
    z-index: 1;
}

/* 巨大ブランドロゴ（背景透かし文字） */
.bs-hero__brand-logo {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) rotate(-2deg);
    z-index: 1;
    font-family: var(--bs-font-montserrat);
    font-size: clamp(3rem, 15vw, 12rem);
    font-weight: 400;
    line-height: 1;
    letter-spacing: 0.25em;
    white-space: nowrap;
    color: rgba(43, 95, 127, 0.08);
    text-shadow: 0 0 50px rgba(43, 95, 127, 0.05);
    pointer-events: none;
    user-select: none;
}

/* ========================================
   セクション見出し
======================================== */
.bs-section__header {
    text-align: center;
    margin-bottom: 80px;
}

.bs-section__title {
    font-size: clamp(2rem, 5vw, 2.8rem);
    font-weight: 400;
    color: var(--bs-primary);
    margin-bottom: 24px;
    position: relative;
    display: inline-block;
}

.bs-section__title::after {
    content: '';
    position: absolute;
    bottom: -12px;
    left: 50%;
    transform: translateX(-50%);
    width: 90px;
    height: 3px;
    background: linear-gradient(90deg, var(--bs-primary), var(--bs-secondary));
    border-radius: 2px;
}

.bs-section__title--white {
    color: var(--bs-white);
}

.bs-section__title--white::after {
    background: linear-gradient(90deg, rgba(255, 255, 255, 0.9), rgba(255, 255, 255, 0.4));
}

.bs-section__title.text-left {
    text-align: left;
    display: block;
}

.bs-section__title.text-left::after {
    left: 0;
    transform: none;
}

.bs-section__subtitle {
    font-size: 1.1rem;
    opacity: 0.8;
    max-width: 600px;
    margin: 0 auto;
}

/* ========================================
   コンテンツグリッド
======================================== */
.bs-content-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: clamp(40px, 8vw, 80px);
    align-items: center;
}

.bs-content-grid--reverse {
    direction: rtl;
}

.bs-content-grid--reverse>* {
    direction: ltr;
}

.bs-lead-text {
    font-size: clamp(1.1rem, 2.5vw, 1.3rem);
    font-weight: 500;
    color: var(--bs-primary);
    margin-bottom: 28px;
    line-height: 1.7;
}

.bs-content-text p {
    margin-bottom: 20px;
    line-height: 1.9;
}

.bs-content-image img {
    width: 100%;
    border-radius: var(--bs-radius);
    box-shadow: var(--bs-shadow-soft);
    transition: var(--bs-transition);
}

.bs-content-image img:hover {
    transform: scale(1.02);
    box-shadow: var(--bs-shadow-medium);
}

/* ========================================
   水源セクション（ダークテーマ）
======================================== */
.bs-source {
    position: relative;
    color: var(--bs-white);
}

.bs-source__bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 30% 20%, rgba(135, 206, 235, 0.4) 0%, transparent 60%),
        linear-gradient(135deg, var(--bs-primary) 0%, #1a4a5c 50%, var(--bs-secondary) 100%);
    z-index: -1;
}

.bs-source__description {
    font-size: 1.15rem;
    text-align: center;
    margin-bottom: 70px;
    opacity: 0.95;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.bs-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
    margin: 70px 0;
}

.bs-feature {
    background: rgba(255, 255, 255, 0.1);
    padding: 36px 28px;
    border-radius: var(--bs-radius);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: var(--bs-transition);
}

.bs-feature:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-8px);
    box-shadow: var(--bs-shadow-medium);
}

.bs-feature h3 {
    font-size: 1.15rem;
    margin-bottom: 16px;
    color: var(--bs-white);
    line-height: 1.4;
}

.bs-feature p {
    font-size: 0.95rem;
    opacity: 0.9;
    line-height: 1.7;
}

.bs-source__gallery {
    margin-top: 70px;
    text-align: center;
}

.bs-source__gallery img {
    max-width: 900px;
    margin: 0 auto;
    border-radius: var(--bs-radius);
    box-shadow: var(--bs-shadow-medium);
}

/* ========================================
   CTA
======================================== */
.bs-cta {
    background: var(--bs-light);
    text-align: center;
}

.bs-cta__title {
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    color: var(--bs-primary);
    margin-bottom: 28px;
    line-height: 1.4;
}

.bs-cta__text {
    font-size: 1.1rem;
    margin-bottom: 48px;
    opacity: 0.8;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.bs-btn {
    display: inline-block;
    padding: 20px 50px;
    background: linear-gradient(135deg, var(--bs-primary), var(--bs-secondary));
    color: var(--bs-white);
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 500;
    letter-spacing: 0.08em;
    transition: var(--bs-transition);
    box-shadow: var(--bs-shadow-soft);
    position: relative;
    overflow: hidden;
}

.bs-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--bs-secondary), var(--bs-primary));
    opacity: 0;
    transition: var(--bs-transition);
}

.bs-btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--bs-shadow-medium);
}

.bs-btn:hover::before {
    opacity: 1;
}

.bs-btn span {
    position: relative;
    z-index: 1;
}

/* ========================================
   フッター
======================================== */
.bs-footer {
    background:#333;
    color: var(--bs-white);
    padding: 60px 0 40px;
    text-align: center;
}

.bs-footer__logo h3 {
    font-size: 2rem;
    letter-spacing: 0.15em;
    margin-bottom: 8px;
    font-weight: 300;
}

.bs-footer__logo p {
    font-family: var(--bs-font-sans);
    font-size: 0.9rem;
    font-style: italic;
    opacity: 0.8;
    margin-bottom: 40px;
}

.bs-footer__copyright {
    font-size: 0.85rem;
    opacity: 0.7;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* ========================================
   アニメーション
======================================== */
.fade-up {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 1s cubic-bezier(0.4, 0, 0.2, 1),
        transform 1s cubic-bezier(0.4, 0, 0.2, 1);
}

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

/* ========================================
   レスポンシブ対応
======================================== */
@media (max-width: 1024px) {
    .bs-section {
        padding: 80px 0;
    }

    .bs-content-grid,
    .bs-content-grid--reverse {
        grid-template-columns: 1fr;
        gap: 40px;
        direction: ltr;
    }

    .bs-content-grid--reverse .bs-content-image {
        order: -1;
    }

    .bs-features {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .bs-btn {
        padding: 16px 36px;
        font-size: 0.9rem;
    }
}

/* ========================================
   768px以下：視認性最優先の自然な高さ設計
======================================== */
@media (max-width: 768px) {

    /* ★ヘッダー：コンパクトに */
    .bs-header {
        position: absolute;
        top: 0;
        padding: 16px 0 8px;
        z-index: 101;
    }

    .bs-header__inner {
        gap: 0;
    }

    .bs-header__logo {
        font-size: 1.5rem;
        letter-spacing: 0.2em;
        text-indent: 0.2em;
    }

    .bs-header__tagline {
        display: none;
    }

    /* ★FV：100vh制約完全解除 */
    .bs-hero {
        height: auto;
        /* ★コンテンツに応じて自然に伸縮 */
        min-height: 100vh;
        /* ★最小限の高さは確保 */
        padding: 100px 0 60px;
        /* ★十分な上下余白 */
        display: block;
        /* ★Flexbox制約解除 */
        overflow: visible;
        /* ★スクロール許可 */
    }

    .bs-hero::before {
        background-attachment: scroll;
        background-position: center 30%;
    }

    .bs-hero .bs-container {
        display: block;
        padding: 0 20px;
        height: auto;
    }

    /* ★インナー：シンプルな縦並び */
    .bs-hero__inner {
        display: flex;
        flex-direction: column;
        gap: 40px;
        /* ★画像とテキストの適切な間隔 */
        width: 100%;
        max-width: 600px;
        margin: 0 auto;
        align-items: center;
    }

    /* ★②画像エリア：自然なサイズで表示 */
    .bs-hero__visual {
        order: -1;
        position: relative;
        width: 100%;
        max-width: 450px;
        height: auto;
        display: flex;
        align-items: center;
        justify-content: center;
        margin: 0 auto;
    }

    .bs-hero__image-main {
        width: 100%;
        max-width: 100%;
        height: auto;
        transform: translateX(-3%);
        /* ★視覚的中央配置 */
        margin: 0 auto;

        /* ★装飾リセット */
        border: none;
        background: transparent;
        box-shadow: none;
        padding: 0;
    }

    .bs-hero__image-main img {
        width: 100%;
        height: auto;
        object-fit: contain;
        border-radius: 24px;
    }

    .bs-hero__image-product {
        position: absolute;
        width: 24%;
        max-width: 110px;
        right: -5px;
        bottom: -20px;
    }

    .bs-hero__badge {
        width: 85px;
        height: 85px;
        left: -15px;
        top: 10%;
        border-width: 1px;
    }

    .bs-hero__badge p {
        font-size: 0.6rem;
        padding: 12px;
        line-height: 1.35;
    }

    /* ★③テキストエリア：可読性最優先 */
    .bs-hero__content {
        order: 1;
        width: 100%;
        text-align: center;
        padding: 0 10px;
    }

    .bs-hero__subtitle {
        font-size: 0.8rem;
        margin-bottom: 8px;
        letter-spacing: 0.12em;
    }

    .bs-hero__subtitle::after {
        width: 28px;
        margin-top: 4px;
    }

    .bs-hero__main-title {
        font-size: 2.2rem;
        letter-spacing: 0.2em;
        text-indent: 0.2em;
        margin-bottom: 12px;
        line-height: 1.2;
    }

    .bs-hero__catch {
        font-size: 0.95rem;
        padding: 10px 18px;
        margin-bottom: 20px;
        line-height: 1.5;
        border-left-width: 3px;

        /* ★黒ザブトンデザイン維持 */
        background: linear-gradient(135deg,
                rgba(0, 0, 0, 0.92) 0%,
                rgba(26, 26, 26, 0.88) 100%);
        color: var(--bs-white);
        display: inline-block;
    }

    .bs-hero__body-text {
        text-align: left;
        /* 中央揃え → 左揃え */
        max-width: 100%;
        padding: 0 10px;
        word-break: keep-all;
        overflow-wrap: break-word;
        white-space: normal;
    }

    .bs-hero__text-primary,
    .bs-hero__text-secondary {
        word-break: keep-all;
        overflow-wrap: break-word;
        white-space: normal;
        /* 行数制限解除 */
        display: block;
        -webkit-line-clamp: unset;
        -webkit-box-orient: unset;
    }

    .bs-hero__text-primary {
        font-size: clamp(1rem, 2.2vw, 1.1rem);
        /* ★16px最小確保 */
        line-height: 1.8;
        margin-bottom: 8px;
        letter-spacing: 0.05em;
        word-break: keep-all;
        overflow-wrap: break-word;
    }

    .bs-hero__text-primary:nth-of-type(2) {
        margin-bottom: 20px;
    }

    .bs-hero__text-secondary {
        font-size: clamp(1rem, 2vw, 1.05rem);
        /* ★16px最小確保 */
        line-height: 2;
        letter-spacing: 0.05em;
        word-break: keep-all;
        overflow-wrap: break-word;
        /* ★行数制限解除で自然な表示 */
    }

    /* 背景ロゴ調整 */
    .bs-hero__brand-logo {
        font-size: 5rem;
        opacity: 0.5;
    }
}

/* ========================================
   480px以下：スマホ最適化
======================================== */
@media (max-width: 480px) {
    .bs-container {
        padding: 0 16px;
    }

    /* ★ヘッダー：最小限 */
    .bs-header {
        padding: 12px 0 6px;
    }

    .bs-header__logo {
        font-size: 1.35rem;
    }

    /* ★FV：自然な高さ設計 */
    .bs-hero {
        height: auto;
        min-height: 100vh;
        padding: 80px 0 50px;
    }

    .bs-hero .bs-container {
        padding: 0 16px;
    }

    .bs-hero__inner {
        gap: 30px;
        max-width: 100%;
    }

    /* ★②画像エリア：適切なサイズ */
    .bs-hero__visual {
        max-width: 380px;
    }

    .bs-hero__image-main {
        transform: translateX(-2%);
    }

    .bs-hero__image-product {
        width: 22%;
        max-width: 85px;
        right: -3px;
        bottom: -15px;
    }

    .bs-hero__badge {
        width: 70px;
        height: 70px;
        left: -10px;
    }

    .bs-hero__badge p {
        font-size: 0.52rem;
        padding: 9px;
    }

    /* ★③テキストエリア：読みやすさ最重視 */
    .bs-hero__content {
        padding: 0 8px;
    }

    .bs-hero__subtitle {
        font-size: 0.75rem;
        margin-bottom: 6px;
    }

    .bs-hero__main-title {
        font-size: 1.9rem;
        margin-bottom: 10px;
    }

    .bs-hero__catch {
        font-size: 0.88rem;
        padding: 9px 15px;
        margin-bottom: 18px;
        line-height: 1.45;
    }

    .bs-hero__body-text {
        text-align: left;
        /* 左揃えで自然な読み心地 */
        max-width: 100%;
        padding: 0 8px;
        word-break: keep-all;
        overflow-wrap: break-word;
        white-space: normal;
    }

    .bs-hero__text-primary,
    .bs-hero__text-secondary {
        font-size: 1rem;
        /* 16px確保 */
        line-height: 1.8;
        /* 読みやすい行間 */
        letter-spacing: 0.04em;
        word-break: keep-all;
        overflow-wrap: break-word;
        white-space: normal;
        display: block;
        -webkit-line-clamp: unset;
        -webkit-box-orient: unset;
    }

    .bs-hero__text-primary {
        font-size: 1rem;
        /* ★16px固定確保 */
        line-height: 1.75;
        margin-bottom: 8px;
        letter-spacing: 0.04em;
    }

    .bs-hero__text-primary:nth-of-type(2) {
        margin-bottom: 18px;
    }

    .bs-hero__text-secondary {
        font-size: 1rem;
        /* ★16px固定確保 */
        line-height: 1.9;
        letter-spacing: 0.04em;
    }

    /* 背景ロゴ調整 */
    .bs-hero__brand-logo {
        font-size: 3.5rem;
        opacity: 0.4;
    }
}

/* ========================================
   ファーストビュー - Lottieロゴ背景
======================================== */

/* ★Lottieロゴ背景コンテナ */
.bs-hero__lottie-bg {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
    max-width: 800px;
    height: auto;
    aspect-ratio: 515 / 452;
    z-index: 1;
    pointer-events: none;

    /* ★静止画用の視認性調整 */
    opacity: 0.05;
    /* ★少し濃いめに調整 */
    filter: grayscale(100%) brightness(1.1) contrast(0.9);
    mix-blend-mode: multiply;
}

/* ★既存要素のz-index調整（階層構造の明確化） */
.bs-hero::before {
    z-index: 0;
    /* ★水面背景 */
}

.bs-hero__lottie-bg {
    z-index: 1;
    /* ★Lottieロゴ */
}

.bs-hero__bg-decoration {
    z-index: 2;
    /* ★装飾グラデーション */
}

.bs-hero__brand-logo {
    display: none;
}

.bs-hero .bs-container {
    position: relative;
    z-index: 10;
    /* ★コンテンツ最前面 */
}

.bs-hero::after {
    z-index: 5;
    /* ★下部フェードアウト */
}

/* ★レスポンシブ対応 */
@media (max-width: 1024px) {
    .bs-hero__lottie-bg {
        top: 35%;
        /* 50% → 35% に調整 */
        max-width: 600px;
        opacity: 0.035;
        filter: grayscale(100%) brightness(1.1) contrast(0.8);
    }
}

@media (max-width: 768px) {
    .bs-hero__lottie-bg {
        top: 30%;
        /* 画像の背面中央に来るように調整 */
        max-width: 450px;
        opacity: 0.03;
        filter: grayscale(100%) brightness(1.0) contrast(0.7) blur(0.5px);
        transform: translate(-50%, -50%) rotate(-1deg);
    }
}

@media (max-width: 480px) {
    .bs-hero__lottie-bg {
        top: 18%;
        /* 画像の真ん中あたりに配置 */
        left: 50%;
        transform: translate(-50%, -50%);

        max-width: 320px;
        opacity: 0.09;
        filter: grayscale(100%) brightness(0.9) contrast(0.7) blur(1px);
    }
}



/* ========================================
   創業者ストーリーセクション（水滴背景版）
======================================== */
.bs-founder {
    background: linear-gradient(135deg, #2a2a2a 0%, #3a3a3a 100%);
    color: var(--bs-white);
    padding: 140px 0;
    position: relative;
    overflow: hidden;
}

/* ★水滴背景画像レイヤー */
.bs-founder::before {
    content: '';
    position: absolute;
    inset: 0;
    /* ★画像パスを水滴画像に変更してください */
    background-image: url('../images/water-ripple-bg.jpeg');
    background-position: center center;
    background-size: cover;
    background-repeat: no-repeat;

    /* ★透明度を3倍アップ（0.12 → 0.35） */
    opacity: 0.35;

    /* ★軽いグレースケール化で背景と調和 */
    filter: grayscale(60%) contrast(1.3) brightness(1.15);

    /* ★自然な合成モード */
    mix-blend-mode: soft-light;

    z-index: 0;

    /* ★繊細な動き */
    animation: gentle-breathe 15s ease-in-out infinite alternate;
}

@keyframes gentle-breathe {
    0% {
        transform: scale(1);
        opacity: 0.12;
    }

    100% {
        transform: scale(1.05);
        opacity: 0.15;
    }
}

/* ★ビネット効果（中央の文字を際立たせる） */
.bs-founder::after {
    content: '';
    position: absolute;
    inset: 0;
    /* ★中央のテキストエリアを自然に保護 */
    background: radial-gradient(ellipse at center,
            rgba(42, 42, 42, 0.4) 0%,
            rgba(42, 42, 42, 0.7) 70%,
            rgba(42, 42, 42, 0.85) 100%);
    z-index: 1;
    pointer-events: none;
}

/* ★既存の装飾（右側グラデーション）を水滴と調和させる */
.bs-founder__bg-decoration {
    position: absolute;
    top: 0;
    right: 0;
    width: 50%;
    height: 100%;
    background: radial-gradient(circle at 70% 50%,
            rgba(43, 95, 127, 0.15) 0%,
            transparent 60%);
    pointer-events: none;
    z-index: 1;
}

.bs-founder__inner {
    max-width: 900px;
    margin: 0 auto;
    position: relative;
    z-index: 10;
    padding: 30px 20px;
    /* ★確実に最前面 */
}

.bs-founder__header {
    margin-bottom: 60px;
}

.bs-founder__role {
    font-family: var(--bs-font-montserrat);
    font-size: 0.9rem;
    letter-spacing: 0.15em;
    opacity: 0.8;
    /* ★可読性向上のため微調整 */
    margin-bottom: 20px;
    text-transform: uppercase;
    color: var(--bs-accent);
    text-shadow:
        0 2px 8px rgba(0, 0, 0, 0.8),
        0 0 20px rgba(184, 134, 11, 0.3);
}

.bs-founder__name {
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    font-weight: 300;
    margin-bottom: 30px;
    letter-spacing: 0.1em;
    line-height: 1.2;
    text-shadow:
        0 3px 10px rgba(0, 0, 0, 0.9),
        0 0 25px rgba(255, 255, 255, 0.1);
}

.bs-founder__line {
    width: 80px;
    height: 1px;
    background: linear-gradient(90deg,
            var(--bs-white) 0%,
            transparent 100%);
    opacity: 0.5;
    /* ★少し強化 */
}

.bs-founder__story p {
    font-size: clamp(1rem, 2.2vw, 1.15rem);
    line-height: 2.2;
    margin-bottom: 40px;
    opacity: 0.95;
    font-weight: 300;
    letter-spacing: 0.05em;
    text-shadow:
        0 2px 6px rgba(0, 0, 0, 0.8),
        0 0 15px rgba(0, 0, 0, 0.4);
}

.bs-founder__emphasis {
    font-weight: 500;
    opacity: 1 !important;
    color: var(--bs-white);
    padding-left: 24px;
    /* ★強調部分に明確な背景 */
    background: linear-gradient(90deg,
            rgba(184, 134, 11, 0.15) 0%,
            rgba(255, 255, 255, 0.08) 50%,
            transparent 100%);
    padding: 16px 24px;
    border-radius: 0 8px 8px 0;
    text-shadow:
        0 2px 8px rgba(0, 0, 0, 0.9),
        0 0 20px rgba(184, 134, 11, 0.3);
}

/* ========================================
   レスポンシブ対応（水滴背景調整）
======================================== */
@media (max-width: 1024px) {
    .bs-founder {
        padding: 100px 0;
    }

    .bs-founder::before {
        opacity: 0.1;
        /* ★タブレットで少し控えめ */
        background-position: center top;
    }
}

@media (max-width: 768px) {
    .bs-founder {
        padding: 80px 0;
    }

    .bs-founder::before {
        opacity: 0.08;
        /* ★スマホでさらに控えめ */
        filter: grayscale(100%) contrast(1.2) brightness(1.1) blur(1px);
        animation: none;
        /* ★アニメーション停止でパフォーマンス向上 */
    }

    .bs-founder__header {
        margin-bottom: 40px;
    }

    .bs-founder__story p {
        margin-bottom: 30px;
    }

    .bs-founder__emphasis {
        margin-left: 0;
        padding-left: 16px;
    }
}

@media (max-width: 480px) {
    .bs-founder {
        padding: 60px 0;
    }

    .bs-founder::before {
        opacity: 0.06;
        /* ★極小画面では最小限 */
        filter: grayscale(100%) contrast(1.1) brightness(1.0) blur(2px);
    }

    .bs-founder__role {
        font-size: 0.8rem;
    }

    .bs-founder__story p {
        font-size: 0.95rem;
        line-height: 2;
    }
}





/* ========================================
   製品詳細セクション（ライトテーマ・修正版）
======================================== */
.bs-product {
    background: var(--bs-white);
    padding: 100px 0;
    position: relative;
}

/* 製品ヒーロー */
.bs-product__hero {
    text-align: center;
    margin-bottom: 60px;
    position: relative;
}

/* 背景ブランドロゴ（控えめに調整） */
.bs-product__brand-bg {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-family: var(--bs-font-montserrat);
    font-size: clamp(3rem, 12vw, 8rem);
    font-weight: 200;
    color: rgba(43, 95, 127, 0.04);
    letter-spacing: 0.2em;
    z-index: 0;
    pointer-events: none;
    user-select: none;
}

/* ★画像を大幅縮小 */
.bs-product__image {
    position: relative;
    z-index: 1;
    max-width: 160px;
    /* ★280px → 160px */
    margin: 0 auto 28px;
}

.bs-product__image img {
    width: 100%;
    height: auto;
    filter: drop-shadow(0 12px 24px rgba(43, 95, 127, 0.12));
}

.bs-product__title {
    font-size: clamp(1.6rem, 3.5vw, 2.2rem);
    font-weight: 500;
    color: var(--bs-primary);
    letter-spacing: 0.1em;
    position: relative;
    z-index: 1;
}

.bs-product__size {
    font-family: var(--bs-font-montserrat);
    font-size: 0.75em;
    font-weight: 300;
    opacity: 0.7;
    margin-left: 10px;
}

/* スペック・データエリア */
.bs-product__specs {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 28px;
}

/* ★角丸完全削除・高級感重視 */
.bs-spec-block {
    border-radius: 0;
    /* ★角丸削除 */
    overflow: hidden;
    box-shadow: none;
    /* ★影削除 */
    border: 1px solid #ddd;
    /* ★シャープな境界線 */
    transition: var(--bs-transition);
    background: var(--bs-white);
}

.bs-spec-block:hover {
    border-color: var(--bs-primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(43, 95, 127, 0.08);
    /* ★控えめなホバー効果 */
}

/* 黒背景ヘッダー（高級感演出） */
.bs-spec-header {
    background: #333;
    color: var(--bs-white);
    padding: 16px 24px;
    border-bottom: 1px solid #1a1a1a;
}

.bs-spec-header h3 {
    font-family: var(--bs-font-montserrat);
    font-size: 1.05rem;
    font-weight: 500;
    letter-spacing: 0.15em;
    margin: 0;
}

/* スペック内容 */
.bs-spec-content {
    background: var(--bs-white);
    padding: 24px 28px;
}

.bs-nutrition-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0;
}

.bs-nutrition-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
    font-size: 0.92rem;
}

.bs-nutrition-item:last-child {
    border-bottom: none;
}

.bs-nutrition-item .label {
    color: #444;
    font-weight: 400;
    letter-spacing: 0.02em;
}

.bs-nutrition-item .value {
    font-family: var(--bs-font-montserrat);
    font-weight: 600;
    color: #111;
}

/* スペックリンク */
.bs-spec-link {
    background: var(--bs-white);
    padding: 18px 24px;
}

.bs-spec-link a {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.95rem;
    color: #333;
    font-weight: 500;
    transition: var(--bs-transition);
}

.bs-spec-link a:hover {
    color: var(--bs-primary);
    transform: translateX(6px);
}

.bs-spec-link .arrow {
    font-family: var(--bs-font-montserrat);
    font-weight: 600;
}

/* ========================================
   レスポンシブ対応
======================================== */
@media (max-width: 1024px) {
    .bs-product {
        padding: 80px 0;
    }
}

@media (max-width: 768px) {
    .bs-product {
        padding: 60px 0;
    }

    .bs-product__hero {
        margin-bottom: 50px;
    }

    .bs-product__image {
        max-width: 130px;
        /* ★タブレット用 */
    }

    .bs-spec-header {
        padding: 14px 20px;
    }

    .bs-spec-content,
    .bs-spec-link {
        padding: 20px;
    }
}

@media (max-width: 480px) {
    .bs-product__image {
        max-width: 110px;
        /* ★スマホ用 */
    }

    .bs-nutrition-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 4px;
        padding: 10px 0;
    }

    .bs-nutrition-item .value {
        align-self: flex-end;
    }

    .bs-spec-header h3 {
        font-size: 0.95rem;
    }
}


/* ========================================
   製品特徴セクション（水背景完全表示版）
======================================== */
.bs-features-highlight {
    position: relative;
    padding: 100px 0;
    overflow: hidden;
    background-color: var(--bs-white);
}

/* 
★完璧な4層構造（下から順に）
z-index: 0  → 水背景画像（最背面）
z-index: 1  → ペットボトル透かし
z-index: 2  → 白オーバーレイ（大幅に薄く調整）
z-index: 10 → コンテンツ（最前面）
*/

/* ★レイヤー1: 水背景画像（確実に見える設定） */
.bs-features-highlight__bg-water {
    position: absolute;
    inset: 0;
    background-image: url('../images/hero-bg-water.jpg');
    background-repeat: no-repeat;
    background-position: center center;
    background-size: cover;
    z-index: 0;

    /* ★明るさを20%削減して深みのある水色に */
    filter: grayscale(5%) brightness(0.95) contrast(1.12) saturate(1.1);

    /* ★微細なアニメーション */
    animation: gentle-water-flow 25s ease-in-out infinite alternate;
}

@keyframes gentle-water-flow {
    0% {
        transform: scale(1) translateX(0);
    }

    100% {
        transform: scale(1.03) translateX(-1%);
    }
}

/* ★レイヤー2: ペットボトル透かし */
.bs-features-highlight__bg-bottle {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    /* X軸・Y軸ともに中央配置 */
    width: 100%;
    max-width: 600px;
    height: 80%;
    /* 中央配置なので少し大きくしてバランス調整 */
    background-image: url('../images/hero-product-bottle.png');
    background-repeat: no-repeat;
    background-position: center bottom;
    background-size: contain;
    z-index: 1;

    /* ★うっすら表示の絶妙なバランス */
    opacity: 0.8;
    filter: grayscale(20%) brightness(1.15);
    mix-blend-mode: multiply;

    /* ★微細な浮遊感 */
    animation: gentle-bottle-float 12s ease-in-out infinite;

    pointer-events: none;
}

/* ★修正：中央配置用の新しい浮遊アニメーション */
@keyframes gentle-bottle-float-center {
    0%, 100% {
        /* 基本の中央位置を維持 */
        transform: translate(-50%, -50%) translateY(0);
    }

    50% {
        /* 縦方向にだけ少し浮かす */
        transform: translate(-50%, -50%) translateY(-15px);
    }
}

/* ★レイヤー3: 視認性確保の白オーバーレイ（劇的に薄く調整） */
.bs-features-highlight::before {
    content: '';
    position: absolute;
    inset: 0;
    /* ★透明度を劇的に下げて水を見せる（0.65-0.75 → 0.35-0.45） */
    background: linear-gradient(180deg,
            rgba(255, 255, 255, 0.35) 0%,
            rgba(255, 255, 255, 0.45) 100%);
    z-index: 2;
    pointer-events: none;
}

/* ★レイヤー4: コンテンツ（最前面） */
.bs-features-highlight .bs-container {
    position: relative;
    z-index: 10;
}

/* セクションヘッダー */
.bs-features-highlight__header {
    text-align: center;
    margin-bottom: 60px;
}

.bs-features-highlight__title {
    font-family: var(--bs-font-montserrat);
    font-size: clamp(2.2rem, 5vw, 3.2rem);
    font-weight: 700;
    letter-spacing: 0.25em;
    text-indent: 0.25em;
    color: var(--bs-primary);
    margin: 0;
    text-transform: uppercase;
    /* ★水背景に対する視認性確保 */
    text-shadow: 0 2px 4px rgba(255, 255, 255, 0.8);
}

/* 4つの特徴グリッド */
.bs-features-highlight__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    max-width: 900px;
    margin: 0 auto 80px;
}

/* 円形特徴ブロック */
.bs-feature-circle {
    aspect-ratio: 1 / 1;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--bs-transition);
}

.bs-feature-circle__inner {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    border: 1px solid #333333;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    /* ★水背景に対応した背景強化 */
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    transition: var(--bs-transition);
    position: relative;
    overflow: hidden;
}

.bs-feature-circle__inner::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg,
            rgba(43, 95, 127, 0.08) 0%,
            rgba(135, 206, 235, 0.08) 100%);
    opacity: 0;
    transition: var(--bs-transition);
}

.bs-feature-circle:hover .bs-feature-circle__inner {
    border-color: var(--bs-primary);
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(43, 95, 127, 0.15);
    background: rgba(255, 255, 255, 0.98);
}

.bs-feature-circle:hover .bs-feature-circle__inner::before {
    opacity: 1;
}

.bs-feature-circle__text {
    font-size: clamp(1rem, 2vw, 1.1rem);
    line-height: 1.6;
    color: #1a1a1a;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-align: center;
    margin: 0;
    position: relative;
    z-index: 1;
    word-break: keep-all;
    overflow-wrap: break-word;
}

/* 安全性訴求エリア */
.bs-features-highlight__safety {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.bs-safety-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    border-bottom: 1px solid #333333;
    padding-bottom: 4px;
    margin-bottom: 40px;
    font-size: 1.05rem;
    font-weight: 600;
    color: #333333;
    text-decoration: none;
    transition: var(--bs-transition);
}

.bs-safety-link:hover {
    color: var(--bs-primary);
    border-bottom-color: var(--bs-primary);
    gap: 12px;
}

.bs-safety-link__text {
    letter-spacing: 0.05em;
}

.bs-safety-link__arrow {
    font-family: var(--bs-font-montserrat);
    font-weight: 600;
    transition: var(--bs-transition);
}

.bs-safety-link:hover .bs-safety-link__arrow {
    transform: translateX(4px);
}

.bs-features-highlight__description {
    font-size: clamp(1rem, 2vw, 1.05rem);
    line-height: 2;
    color: #222222;
    /* ★水背景に対応して濃く */
    letter-spacing: 0.05em;
    margin: 0;
    word-break: keep-all;
    overflow-wrap: break-word;
}

/* ========================================
   レスポンシブ対応
======================================== */
@media (max-width: 1024px) {
    .bs-features-highlight {
        padding: 80px 0;
    }

    .bs-features-highlight__bg-water {
        filter: grayscale(8%) brightness(1.02) contrast(1.05);
        animation-duration: 30s;
    }

    .bs-features-highlight::before {
        background: linear-gradient(180deg,
                rgba(255, 255, 255, 0.4) 0%,
                rgba(255, 255, 255, 0.5) 100%);
    }

    .bs-features-highlight__bg-bottle {
        max-width: 500px;
        opacity: 0.8;
    }

    .bs-features-highlight__grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 25px;
        max-width: 500px;
        margin-bottom: 60px;
    }
}

@media (max-width: 768px) {
    .bs-features-highlight {
        padding: 60px 0;
    }

    .bs-features-highlight__bg-water {
        filter: grayscale(12%) brightness(1.0) contrast(1.0);
        animation: none;
        background-position: center 35%;
    }

    .bs-features-highlight::before {
        background: linear-gradient(180deg,
                rgba(255, 255, 255, 0.45) 0%,
                rgba(255, 255, 255, 0.55) 100%);
    }

    .bs-features-highlight__bg-bottle {
        max-width: 400px;
        opacity: 0.8;
        animation: none;
    }

    .bs-features-highlight__header {
        margin-bottom: 50px;
    }

    .bs-features-highlight__grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
        max-width: 400px;
        margin-bottom: 50px;
    }

    .bs-feature-circle__inner {
        padding: 15px;
        background: rgba(255, 255, 255, 0.92);
    }

    .bs-feature-circle__text {
        font-size: 1rem;
        line-height: 1.5;
    }

    .bs-safety-link {
        font-size: 1rem;
        margin-bottom: 30px;
    }

    .bs-features-highlight__description {
        font-size: 1rem;
        line-height: 1.9;
        text-align: left;
    }



    .bs-features-highlight__safety {
        padding: 30px 20px;


    }
}

@media (max-width: 480px) {
    .bs-features-highlight {
        padding: 50px 0;
    }

    .bs-features-highlight__bg-water {
        filter: grayscale(15%) brightness(0.98) contrast(0.95);
        background-position: center 30%;
    }

    .bs-features-highlight::before {
        background: linear-gradient(180deg,
                rgba(255, 255, 255, 0.5) 0%,
                rgba(255, 255, 255, 0.6) 100%);
    }

    .bs-features-highlight__bg-bottle {
        max-width: 300px;
        opacity: 0.9;
    }

    .bs-features-highlight__header {
        margin-bottom: 40px;
    }

    .bs-features-highlight__title {
        font-size: 2rem;
    }

    .bs-features-highlight__grid {
        gap: 16px;
        margin-bottom: 40px;
    }

    .bs-feature-circle__inner {
        padding: 12px;
        background: rgba(255, 255, 255, 0.94);
    }

    .bs-feature-circle__text {
        font-size: 1rem;
        line-height: 1.4;
    }

    .bs-safety-link {
        font-size: 0.95rem;
        margin-bottom: 25px;
    }

    .bs-features-highlight__description {
        font-size: 1rem;
        line-height: 1.8;
    }
}


/* ========================================
   水源・プロデューサーストーリー（参考画像構成）
======================================== */
.bs-source-story {
    padding: 140px 0;
    background: var(--bs-white);
    position: relative;
}

/* 左右2カラム構成 */
.bs-source-story__hero {
    max-width: 1200px;
    margin: 0 auto 140px;
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    gap: 80px;
    align-items: center;
}

/* --- 左側：写真コラージュ（参考画像通り・角丸なし高級版） --- */
.bs-source-story__photos {
    position: relative;
    width: 100%;
    max-width: 520px;
    aspect-ratio: 1 / 1;
    min-height: 520px;

    /* ★カード風デザインを完全削除 */
    background: transparent;
    /* 白背景削除 */
    padding: 0;
    /* パディング削除 */
    border: none;
    /* 境界線削除 */
    box-shadow: none;
    /* 影削除 */
}

/* メイン画像（左上の大きな田んぼ） */
.bs-source-story__photo-main {
    position: absolute;
    top: 0;
    left: 0;
    width: 78%;
    /* ★参考画像に合わせた比率 */
    height: 70%;
    /* ★下と右に余白を確保 */
    overflow: hidden;
    border: 1px solid rgba(0, 0, 0, 0.08);
    /* ★画像自体の境界線は維持 */
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.08);
    /* ★控えめな影 */
    z-index: 1;
}

.bs-source-story__photo-main img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center center;
    filter: brightness(0.98) contrast(1.04);
    transition: transform 1s cubic-bezier(0.4, 0, 0.2, 1);
}

.bs-source-story__photo-main:hover img {
    transform: scale(1.03);
}

/* 小さい2枚の共通スタイル */
.bs-source-story__photo-sub {
    position: absolute;
    overflow: hidden;
    border: 1px solid rgba(0, 0, 0, 0.08);
    /* ★角丸なし */
    box-shadow: 0 18px 40px rgba(0, 0, 0, 0.15);
    border: 4px solid var(--bs-white);
    /* ★白枠で分離効果 */
}

.bs-source-story__photo-sub img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: brightness(0.98) contrast(1.02);
    transition: transform 1s cubic-bezier(0.4, 0, 0.2, 1);
}

.bs-source-story__photo-sub:hover img {
    transform: scale(1.05);
}

/* 左下の小さい写真（米粒を持つ手） */
.bs-source-story__photo-sub--left {
    bottom: 6%;
    /* ★メイン画像の左端に合わせて配置 */
    left: 4%;
    width: 32%;
    aspect-ratio: 1 / 1;
    /* ★正方形 */
    z-index: 2;
}

/* 右下の大きめの写真（田植え） */
.bs-source-story__photo-sub--right {
    bottom: 0;
    right: 0;
    width: 55%;
    aspect-ratio: 4 / 3;
    /* ★横長 */
    z-index: 3;
    /* ★最前面 */
}

/* --- 右側：テキストエリア --- */
.bs-source-story__text {
    padding-right: 20px;
}

.bs-source-story__eyebrow {
    font-family: var(--bs-font-montserrat);
    font-size: 0.85rem;
    letter-spacing: 0.18em;
    color: var(--bs-accent);
    margin-bottom: 10px;
    font-weight: 600;
    text-transform: uppercase;
}

.bs-source-story__heading {
    font-family: var(--bs-font-serif);
    font-size: clamp(2rem, 3vw, 2.4rem);
    font-weight: 400;
    letter-spacing: 0.08em;
    margin-bottom: 30px;
    color: #1a1a1a;
}

.bs-source-story__catch {
    font-family: var(--bs-font-serif);
    font-size: 1.1rem;
    line-height: 1.9;
    margin-bottom: 28px;
    letter-spacing: 0.06em;
    font-weight: 500;
    color: var(--bs-primary);
}

.bs-source-story__body {
    font-size: 0.98rem;
    line-height: 2.1;
    margin-bottom: 18px;
    letter-spacing: 0.05em;
    color: #333;
}

.bs-source-story__emphasis {
    font-family: var(--bs-font-serif);
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--bs-primary);
    letter-spacing: 0.08em;
    margin: 32px 0;


}

/* --- プロデューサー紹介（高級感統一） --- */
.bs-source-story__producer {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 0;
    align-items: stretch;
    max-width: 1000px;
    margin: 0 auto;
    /* ★枠・影を完全削除 */
    background: transparent;
    /* 背景色削除 */
    overflow: visible;
    /* 制約解除 */
    border: none;
    /* 境界線削除 */
    box-shadow: none;
    /* 影削除 */
}

.bs-source-story__producer-image {
    min-height: 420px;
}

.bs-source-story__producer-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: brightness(0.98) contrast(1.02);
}

.bs-source-story__producer-content {
    padding: 60px 50px;
}

.bs-source-story__producer-header {
    margin-bottom: 30px;
}

.bs-source-story__producer-label {
    font-family: var(--bs-font-montserrat);
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    color: var(--bs-accent);
    margin-bottom: 8px;
    display: block;
    text-transform: uppercase;
}

.bs-source-story__producer-name {
    font-size: clamp(1.6rem, 3vw, 2rem);
    font-weight: 400;
    color: var(--bs-primary);
    margin: 0;
    letter-spacing: 0.08em;
}

.bs-source-story__producer-bio p {
    font-size: 1rem;
    line-height: 2.2;
    color: #333;
    margin-bottom: 20px;
    letter-spacing: 0.05em;
    font-weight: 300;
}

.bs-source-story__producer-bio p:last-child {
    margin-bottom: 0;
}

/* ========================================
   レスポンシブ対応
======================================== */
/* ========================================
   レスポンシブ対応（配置バランス維持）
======================================== */
@media (max-width: 1024px) {
    .bs-source-story {
        padding: 100px 0;
    }

    .bs-source-story__hero {
        gap: 60px;
        margin-bottom: 100px;
    }

    .bs-source-story__photos {
        max-width: 480px;
        min-height: 480px;
        padding: 0px;
    }

    .bs-source-story__photo-main {
        width: 76%;
        height: 68%;
    }

    .bs-source-story__photo-sub--left {
        width: 34%;
        left: 3%;
        bottom: 6%;
    }

    .bs-source-story__photo-sub--right {
        width: 58%;
    }

    .bs-source-story__producer {
        gap: 30px;
        /* ★タブレット用間隔調整 */
    }

}

@media (max-width: 768px) {
    .bs-source-story {
        padding: 80px 0;
    }

    /* 水源エリア：スマホでは縦並び */
    .bs-source-story__hero {
        grid-template-columns: 1fr;
        gap: 50px;
        margin-bottom: 80px;
    }

    .bs-source-story__photos {
        max-width: 420px;
        margin: 0 auto;
        min-height: 420px;
        padding: 24px;
        order: -1;
        /* 写真を上に */
    }

    .bs-source-story__photo-main {
        width: 74%;
        height: 65%;
    }

    .bs-source-story__photo-sub--left {
        width: 36%;
        left: 2%;
        bottom: 6%;
    }

    .bs-source-story__photo-sub--right {
        width: 60%;
    }

    .bs-source-story__text {
        padding: 30px 20px;
        padding-right: 0;
    }

    /* プロデューサー縦並び */
    .bs-source-story__producer {
        grid-template-columns: 1fr;
    }

    .bs-source-story__producer-content {
        padding: 40px 30px;
    }
}

@media (max-width: 480px) {
    .bs-source-story__hero {
        gap: 40px;
    }

    .bs-source-story__photos {
        max-width: 340px;
        min-height: 340px;
        padding: 20px;
    }

    .bs-source-story__photo-main {
        width: 100%;
        height: 62%;
    }

    .bs-source-story__photo-sub--left {
        width: 38%;
        left: -4%;
        bottom: 8%;
    }

    .bs-source-story__photo-sub--right {
        bottom: -10%;
        right: 0;
        width: 62%;
    }

    .bs-source-story__heading {
        font-size: 1.8rem;
    }

    .bs-source-story__catch {
        font-size: 1rem;
    }

    .bs-source-story__body {
        font-size: 0.95rem;
    }

    .bs-source-story__producer-content {
        padding: 30px 20px;
    }
}


/* ========================================
   PFOS/PFAS証明書モーダル（角丸なし・高級感重視）
======================================== */

/* モーダル全体 */
.bs-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.4s cubic-bezier(0.4, 0, 0.2, 1), visibility 0.4s;
    padding: 20px;
}

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

/* 背景オーバーレイ */
.bs-modal__overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.85); /* ★高級感のある濃いオーバーレイ */
    backdrop-filter: blur(4px); /* ★背景ぼかし効果 */
    z-index: 1;
}

/* モーダルコンテナ */
.bs-modal__container {
    position: relative;
    z-index: 2;
    background: var(--bs-white);
    width: 100%;
    max-width: 900px;
    max-height: 90vh;
    overflow: hidden;
    
    /* ★BISHOSUIブランド統一：角丸完全削除 */
    border-radius: 0;
    border: 1px solid rgba(0, 0, 0, 0.08);
    box-shadow: 0 30px 80px rgba(0, 0, 0, 0.3);
    
    /* ★上品なアニメーション */
    transform: translateY(30px);
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.bs-modal.is-active .bs-modal__container {
    transform: translateY(0);
    
}

/* メモリ節約：アニメーション完了後にwill-changeを解除 */
.bs-modal.is-active .bs-modal__container {
    /* アニメーション完了0.1秒後にwill-changeを無効化 */
    transition-delay: 0.5s;
}

.bs-modal.is-active .bs-modal__container {
    will-change: auto;
}

/* 閉じるボタン */
.bs-modal__close {
    position: absolute;
    top: 20px;
    right: 25px;
    z-index: 10;
    background: rgba(0, 0, 0, 0.8);
    border: none;
    color: var(--bs-white);
    font-size: 2rem;
    font-weight: 300;
    line-height: 1;
    width: 45px;
    height: 45px;
    cursor: pointer;
    
    /* ★角丸なしで統一 */
    border-radius: 0;
    border: 1px solid rgba(255, 255, 255, 0.1);
    
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--bs-transition);
}

.bs-modal__close:hover {
    background: rgba(0, 0, 0, 0.95);
    color: var(--bs-accent);
}

/* コンテンツエリア */
.bs-modal__content {
    padding: 60px 50px 50px;
    overflow-y: auto;
    max-height: 90vh;
    text-align: center;
}

/* タイトル */
.bs-modal__title {
    font-family: var(--bs-font-serif);
    font-size: clamp(1.4rem, 3vw, 1.8rem);
    font-weight: 500;
    color: var(--bs-primary);
    margin-bottom: 40px;
    letter-spacing: 0.08em;
    line-height: 1.4;
}

/* 画像ラッパー */
.bs-modal__image-wrapper {
    margin-bottom: 30px;
    border: 1px solid rgba(0, 0, 0, 0.08); /* ★角丸なし */
    overflow: hidden;
    transition: var(--bs-transition);
}

.bs-modal__image-wrapper:hover {
    box-shadow: 0 8px 24px rgba(43, 95, 127, 0.15);
}

/* 証明書画像 */
.bs-modal__image {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.4s ease;
}

.bs-modal__image-wrapper:hover .bs-modal__image {
    transform: scale(1.02);
}

/* 注釈 */
.bs-modal__note {
    font-size: 0.9rem;
    color: #666;
    letter-spacing: 0.05em;
    opacity: 0.8;
    font-weight: 300;
}

/* ========================================
   レスポンシブ対応
======================================== */

@media (max-width: 1024px) {
    .bs-modal__container {
        max-width: 800px;
    }
    
    .bs-modal__content {
        padding: 50px 40px 40px;
    }
}

@media (max-width: 768px) {
    .bs-modal {
        padding: 15px;
    }
    
    .bs-modal__container {
        max-width: 95%;
        max-height: 85vh;
    }
    
    .bs-modal__content {
        padding: 45px 30px 30px;
    }
    
    .bs-modal__close {
        top: 15px;
        right: 20px;
        width: 40px;
        height: 40px;
        font-size: 1.8rem;
    }
    
    .bs-modal__title {
        font-size: 1.3rem;
        margin-bottom: 30px;
        padding-right: 25px; /* 閉じるボタン回避 */
    }
}

@media (max-width: 480px) {
    .bs-modal {
        padding: 10px;
    }
    
    .bs-modal__content {
        padding: 40px 20px 25px;
    }
    
    .bs-modal__close {
        top: 12px;
        right: 15px;
        width: 36px;
        height: 36px;
        font-size: 1.6rem;
    }
    
    .bs-modal__title {
        font-size: 1.1rem;
        margin-bottom: 24px;
        padding-right: 20px;
    }
    
    .bs-modal__note {
        font-size: 0.85rem;
    }
}

/* ========================================
   スクロール制御
======================================== */
body.modal-open {
    overflow: hidden;
}


/* buttonタグ用のスタイルリセット（BISHOSUIデザイン維持） */
button.bs-safety-link {
    /* ★ブラウザデフォルトのボタンスタイルをリセット */
    background: none;
    border: none;
    padding: 0;
    cursor: pointer;
    font-family: inherit;
    font-size: inherit;
    
    /* ★既存のリンクスタイルを完全継承 */
    display: inline-flex;
    align-items: center;
    gap: 8px;
    border-bottom: 1px solid #333333;
    padding-bottom: 4px;
    margin-bottom: 40px;
    font-size: 1.05rem;
    font-weight: 600;
    color: #333333;
    text-decoration: none;
    transition: var(--bs-transition);
}

button.bs-safety-link:hover {
    color: var(--bs-primary);
    border-bottom-color: var(--bs-primary);
    gap: 12px;
}

button.bs-safety-link:hover .bs-safety-link__arrow {
    transform: translateX(4px);
}

/* ========================================
   カクつき防止：GPU加速強制
======================================== */

/* GPU加速の強制適用 */
.bs-modal__container {
    /* ★既存のtransform設定を3D変形に変更 */
    transform: translate3d(0, 30px, 0); /* translateY(30px) → translate3d */
    
    /* ★GPUレイヤー作成の予告 */
    will-change: transform, opacity;
    
    /* ★サブピクセルのブレ防止 */
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
}

.bs-modal.is-active .bs-modal__container {
    transform: translate3d(0, 0, 0); /* 3D変形を維持 */
}

/* その他の要素もGPU化 */
.bs-modal,
.bs-modal__overlay {
    will-change: opacity;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
}

/* スマホでは重い処理を無効化 */
@media (max-width: 768px) {
    .bs-modal__overlay {
        backdrop-filter: none; /* ★ぼかし効果を切る */
    }
    
    .bs-modal__container {
        box-shadow: 0 15px 40px rgba(0, 0, 0, 0.2); /* ★影を軽くする */
    }
}