/* ============================================================
   製品紹介 CSS（PC専用・レスポンシブ対応）
   クラス命名: btc-products-pc__*
   ブレークポイント: 768px / 1024px（モバイルファースト）
   1024px以上：製品ペアを画像＋情報の2カラムグリッドに変換
   ============================================================ */

/* --- [01] 基礎設定 --- */
body { margin: 0; padding: 0; background-color: #f5f5f0; color: #2d2d2d; font-family: 'Inter', 'Noto Sans JP', sans-serif; position: relative; overflow-x: hidden; -webkit-tap-highlight-color: transparent; }
body::before { content: ""; position: fixed; top: 0; left: 0; width: 100%; height: 100%; background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E"); opacity: 0.04; pointer-events: none; z-index: 9998; }

/* --- [02] パンくずリスト --- */
.btc-products-pc__breadcrumb-container { position: relative; padding: 85px 25px 20px; z-index: 10; max-width: 800px; margin: 0 auto; box-sizing: border-box; }
.btc-products-pc__breadcrumbs { list-style: none; display: flex; align-items: center; padding: 0; margin: 0; font-size: 11px; letter-spacing: 0.05em; overflow-x: auto; white-space: nowrap; -webkit-overflow-scrolling: touch; }
.btc-products-pc__breadcrumbs li:not(:last-child)::after { content: "/"; margin: 0 10px; color: #ccc; }
.btc-products-pc__breadcrumbs a { text-decoration: none; color: #2d2d2d; opacity: 0.5; }
.btc-products-pc__breadcrumbs li:last-child { color: #2d2d2d; opacity: 1; }

/* --- [03] ページタイトル --- */
.btc-products-pc__page-header { padding: 20px 25px 40px; text-align: center; position: relative; }
.btc-products-pc__page-title { font-family: 'Noto Sans JP', sans-serif; font-weight: 500; font-size: 24px; letter-spacing: 0.1rem; margin: 0; color: #1a2a40; line-height: 1.6; }
.btc-products-pc__page-title span { display: block; font-size: 12px; letter-spacing: 0.3em; margin-top: 10px; opacity: 0.6; }

/* --- [04] 製品ペア（ラッパー） --- */
.btc-products-pc__product-pair { display: block; }

/* --- [05] フルワイド画像 --- */
.btc-products-pc__full-wide-image-container { width: 100vw; position: relative; left: 50%; right: 50%; margin-left: -50vw; margin-right: -50vw; overflow: hidden; line-height: 0; }
.btc-products-pc__full-wide-image-container img { width: 100%; height: auto; object-fit: cover; object-position: center; }

/* --- [06] 製品情報フレックス --- */
.btc-products-pc__product-info-flex { display: flex; align-items: flex-end; justify-content: space-between; padding: 35px 25px 80px; max-width: 600px; margin: 0 auto; }
.btc-products-pc__text-group { text-align: left; flex: 1; }
.btc-products-pc__label-mini { font-size: 13px; letter-spacing: 0.2em; color: #9e7e5d; margin-bottom: 8px; display: block; }
.btc-products-pc__title-main { font-size: 26px; font-weight: 700; letter-spacing: 0.05em; color: #1a2a40; margin: 0 0 12px 0; }
.btc-products-pc__desc-text { font-size: 14px; line-height: 1.7; letter-spacing: 0.05em; color: #4a4a4a; margin: 0; }

/* --- [07] 丸いアクションボタン --- */
.btc-products-pc__round-btn { width: 80px; height: 80px; border-radius: 50%; display: flex; flex-direction: column; align-items: center; justify-content: center; text-decoration: none; color: #fff; flex-shrink: 0; margin-left: 16px; transition: transform 0.3s ease, opacity 0.3s ease; box-shadow: 0 4px 10px rgba(0,0,0,0.1); }
.btc-products-pc__round-btn:active { transform: scale(0.95); opacity: 0.9; }
.btc-products-pc__arrow { font-size: 18px; font-weight: 300; margin-bottom: -3px;}
.btc-products-pc__btn-label { font-size: 11px; letter-spacing: 0.05em; white-space: nowrap; }

/* --- [08] フェードインアニメーション --- */
.btc-products-pc__fade-in-up { opacity: 0; transform: translateY(30px); transition: opacity 1.5s cubic-bezier(0.33, 1, 0.68, 1), transform 1.5s cubic-bezier(0.33, 1, 0.68, 1); will-change: opacity, transform; }
.btc-products-pc__fade-in-up.btc-products-pc__is-visible { opacity: 1; transform: translateY(0); }


/* ============================================================
   タブレット（768px〜）
   ============================================================ */
@media (min-width: 768px) {
    .btc-products-pc__breadcrumb-container {
        max-width: 900px;
        padding: 100px 40px 20px;
    }

    .btc-products-pc__breadcrumbs {
        font-size: 12px;
    }

    .btc-products-pc__page-header {
        padding: 20px 40px 50px;
    }

    .btc-products-pc__page-title {
        font-size: 1.6rem;
    }

    .btc-products-pc__product-pair {
        margin-bottom: 60px;
    }

    .btc-products-pc__product-info-flex {
        max-width: 720px;
        padding: 45px 40px 90px;
    }

    .btc-products-pc__title-main {
        font-size: 30px;
    }

    .btc-products-pc__desc-text {
        font-size: 13px;
    }

    .btc-products-pc__round-btn {
        width: 90px;
        height: 90px;
    }

    .btc-products-pc__arrow {
        font-size: 20px;
    }

    .btc-products-pc__btn-label {
        font-size: 12px;
    }
}


/* ============================================================
   PC（1024px〜）
   製品ペアを左：画像 / 右：情報の2カラムグリッドに変換
   偶数ペアは左右を入れ替えて交互レイアウト
   ============================================================ */
@media (min-width: 1024px) {
    .btc-products-pc__breadcrumb-container {
        max-width: 1080px;
        padding: 110px 60px 20px;
        box-sizing: border-box;
    }

    .btc-products-pc__breadcrumbs {
        font-size: 13px;
    }

    .btc-products-pc__page-header {
        padding: 20px 60px 60px;
        max-width: 1080px;
        margin: 0 auto;
        box-sizing: border-box;
    }

    .btc-products-pc__page-title {
        font-size: 1.875rem;
    }

    /* 2カラムグリッドに変換（画像は実際の比率 750:470 でトリミングなしに表示） */
    .btc-products-pc__product-pair {
        display: grid;
        grid-template-columns: 1.3fr 1fr;
        max-width: 1080px;
        margin: 0 auto 80px;
        overflow: hidden;
    }

    /* 画像カラム：フルワイドトリックを解除してグリッドセルを満たす */
    .btc-products-pc__image-col {
        overflow: hidden;
    }

    .btc-products-pc__full-wide-image-container {
        width: 100%;
        height: auto;
        aspect-ratio: 750 / 470;
        position: static;
        left: auto;
        right: auto;
        margin: 0;
    }

    .btc-products-pc__full-wide-image-container img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        display: block;
    }

    /* 情報カラム：上揃えで配置（タイトルの行数が変わっても開始位置を揃え、丸ボタンの絶対配置の基準にもなる） */
    .btc-products-pc__info-col {
        background-color: #f5f5f0;
        display: flex;
        align-items: flex-start;
        position: relative;
    }

    .btc-products-pc__product-info-flex {
        width: 100%;
        max-width: none;
        padding: 60px 80px 110px;
        margin: 0;
        box-sizing: border-box;
        align-items: flex-start;
    }

    .btc-products-pc__label-mini {
        font-size: 14px;
        margin-bottom: 12px;
    }

    .btc-products-pc__title-main {
        font-size: 36px;
        margin-bottom: 18px;
    }

    .btc-products-pc__desc-text {
        font-size: 14px;
        line-height: 1.9;
    }

    .btc-products-pc__round-btn {
        width: 100px;
        height: 100px;
        margin-left: 0;
        position: absolute;
        right: 20px;
        bottom: 28px;
        z-index: 2;
    }

    .btc-products-pc__round-btn:hover {
        transform: scale(1.08);
        opacity: 0.88;
    }

    .btc-products-pc__arrow {
        font-size: 22px;
        margin-bottom: -5px;
    }

    .btc-products-pc__btn-label {
        font-size: 13px;
    }

    /* 偶数ペア：画像を右・情報を左に入れ替え（列幅も反転し、画像側を常に広く保つ） */
    .btc-products-pc__product-pair:nth-of-type(even) {
        grid-template-columns: 1fr 1.3fr;
    }

    .btc-products-pc__product-pair:nth-of-type(even) .btc-products-pc__image-col {
        order: 2;
    }

    .btc-products-pc__product-pair:nth-of-type(even) .btc-products-pc__info-col {
        order: 1;
    }
}