/* ==========================================================================
   LINE コンテンツエリア（下層スタイル）
   ========================================================================== */

/* LINEコンテンツの親となるコンテナの横幅調整 */
.page-content .container {
    max-width: 1000px; 
    margin: 0 auto;
    position: relative;
}
.page-content .container:nth-child(1){
    margin-bottom: 80px;
}

.intro__line-box {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 40px;
    padding: 40px 0 0; 
    background-color: #10C755; /* LINEグリーン */
    color: #fff;
    border-radius: 20px; 
    padding-left: 4%;
    padding-right: 4%;
    box-sizing: border-box;
    max-width: 900px;
    margin: 0 auto;
}

/* --- 左側：テキスト情報エリア --- */
.intro__line-content {
    width: 61%;
}

/* ヘッダー飾り (アイコン + テキスト) */
.intro__line-head {
    display: flex;
    align-items: flex-end;
    margin-bottom: 20px;
    justify-content: flex-start; 
    gap: 20px;
}

.icon-line {
    width: 250px;
    height: auto;
    display: block;
}
.icon-line img {
    width: 100%;
    height: auto;
}

/* 「\ 友だち限定 /」テキスト */
.text-white {
    color: #fff;
    font-weight: 700;
    font-size: 2.8rem;
    line-height: 1;
    position: relative;
    white-space: nowrap;
}

/* メインキャッチ (黄色) */
.intro__line-title {
    color: #FFF100;
    font-size: 4.6rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 40px;
    text-align: left;
}

.intro__line-title .text-small {
    font-size: 0.6em;
    margin-left: 10px;
}

/* ボディ部分 (QR + 説明 + ボタン) */
.intro__line-body {
    display: flex;
    align-items: center;
    gap: 30px;
}

/* QRコードボックス */
.intro__line-qr {
    flex-shrink: 0;
    width: 110px;
    height: 110px;
    background-color: #fff;
    padding: 10px;
    border-radius: 10px;
    box-sizing: border-box;
}
.intro__line-qr img {
    width: 100%;
    height: auto;
    display: block;
}

/* 説明文エリア */
.intro__line-desc {
    flex-grow: 1;
}

.intro__line-desc p {
    font-size: 1.5rem;
    font-weight: 500;
    color: #fff;
}

.intro__line-desc .highlight {
    font-weight: 700;
    color: #fff;
    border-bottom: 2px solid rgba(255, 241, 0, 0.6);
    padding-bottom: 2px;
}

/* 友だち追加ボタン */
.btn-line {
    display: none; 
    align-items: center;
    justify-content: center;
    background-color: #fff;
    color: #10C755;
    font-weight: 700;
    font-size: 1.6rem;
    padding: 15px 40px;
    border-radius: 50px;
    text-decoration: none;
    box-shadow: 0 4px 10px rgba(0,0,0,0.15);
    transition: transform 0.3s, box-shadow 0.3s;
}

/* --- 右側：スマホ画像 --- */
.intro__line-mock {
    width: 37%;
    position: relative;
    height: 450px;      
    overflow: hidden;   
    align-self: flex-end; 
    display: flex;
    align-items: flex-start; 
}

.intro__line-mock img {
    width: 100%;
    height: auto;
    object-position: top; 
}


/* ==========================================================================
   レスポンシブ（タブレット・スマホ対応）
   ========================================================================== */

/* --- タブレットサイズ (Max 960px) --- */
@media screen and (max-width: 960px) {
    .content-header{
        font-size: 2.8rem;
        font-weight: bold;
        text-align: center;
        color: #172A88;
    }
    .content-header span{
        display: block;
        font-size: 2rem;
    }
    .page-content .container:nth-child(2){
        width: 100%;
    }
    .intro__line-box {
        flex-direction: column;
        align-items: center;
        gap: 10px;
        padding: 40px 5%;
        max-width: none;
        border-radius: 0;
        padding-bottom: 0;
    }
    .intro__line-content {
        width: 100%;
        text-align: center;
    }
    .intro__line-head {
        justify-content: center;
    }
    .icon-line { width: 180px; }
    .text-white { font-size: 2rem; }
    .intro__line-title {
        font-size: 3.4rem;
        margin-bottom: 20px;
        text-align: center;
    }
    .intro__line-title .text-small {
        font-size: 2rem;
    }
    .intro__line-qr {
        display: none; 
    }
    .intro__line-desc p {
        text-align: center;
    }
    .btn-line {
        display: flex; 
        width: 100%;
        max-width: 300px;
        margin: 10px auto 0;
    }
    .intro__line-mock {
        width: 300px;
        align-self: center;
        height: 300px;
    }
}

/* --- スマホサイズ (Max 480px) --- */
@media screen and (max-width: 480px) {
    .intro__line-desc p {
        text-align: left; 
    }
}