/* ============================================
   コラム一覧ページ専用CSS
   既存のstyle.css, about.cssを継承
   ============================================ */

/* --------------------------------------------
   カテゴリフィルター
   -------------------------------------------- */
.column-filter {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 40px;
    padding: 0;
}

.column-filter__btn {
    display: inline-block;
    padding: 8px 20px;
    font-size: 14px;
    font-weight: 500;
    color: #474747;
    background: #f5f5f5;
    border: 1px solid #ddd;
    border-radius: 30px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: inherit;
}

.column-filter__btn:hover {
    border-color: #ff8c00;
    color: #ff8c00;
    background: #fff;
}

.column-filter__btn.is-active {
    background: #ff8c00;
    color: #fff;
    border-color: #ff8c00;
}

/* --------------------------------------------
   記事一覧
   -------------------------------------------- */
.column-list {
    display: flex;
    flex-direction: column;
    gap: 25px;
    margin-bottom: 50px;
}

.column-item {
    display: flex;
    gap: 25px;
    background: #fff;
    border: 1px solid #eee;
    border-radius: 8px;
    overflow: hidden;
    text-decoration: none;
    color: inherit;
    transition: box-shadow 0.3s ease, transform 0.3s ease;
}

.column-item:hover {
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    transform: translateY(-3px);
}

.column-item__thumb {
    flex-shrink: 0;
    width: 280px;
    background: #ffe2bf;
}

.column-item__thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.column-item__body {
    flex: 1;
    padding: 25px 25px 25px 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.column-item__meta {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 10px;
}

.column-item__meta time {
    font-size: 13px;
    color: #999;
}

.column-item__cat {
    display: inline-block;
    padding: 3px 12px;
    font-size: 11px;
    font-weight: 600;
    border-radius: 20px;
    background: #ffe2bf;
    color: #ff8c00;
}

/* カテゴリ別カラー */
.column-item__cat--prevention {
    background: #e8f5d0;
    color: #6ba312;
}

.column-item__cat--perio {
    background: #fde8e8;
    color: #c92a2a;
}

.column-item__cat--caries {
    background: #ffe2bf;
    color: #ff8c00;
}

.column-item__cat--ortho {
    background: #f0edfc;
    color: #7048e8;
}

.column-item__cat--implant {
    background: #e2f0fb;
    color: #1971c2;
}

.column-item__cat--whitening {
    background: #fff0e6;
    color: #e8590c;
}

.column-item__cat--child {
    background: #fce4ec;
    color: #d6336c;
}

.column-item__title {
    font-size: 18px;
    font-weight: 700;
    line-height: 1.6;
    color: #474747;
    margin: 0 0 10px;
    transition: color 0.3s ease;
}

.column-item:hover .column-item__title {
    color: #ff8c00;
}

.column-item__excerpt {
    font-size: 14px;
    color: #474747;
    line-height: 1.7;
    margin: 0;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* --------------------------------------------
   ページネーション
   -------------------------------------------- */
.column-pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    margin-bottom: 60px;
}

.column-pagination a,
.column-pagination span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 10px;
    font-size: 14px;
    font-weight: 500;
    border: 1px solid #ddd;
    border-radius: 5px;
    color: #666;
    text-decoration: none;
    transition: all 0.3s ease;
}

.column-pagination a:hover {
    background: #ffe2bf;
    border-color: #ff8c00;
    color: #ff8c00;
}

.column-pagination__current {
    background: #ff8c00;
    color: #fff;
    border-color: #ff8c00;
}

.column-pagination__dots {
    border: none;
    color: #999;
    min-width: auto;
}

.column-pagination__next {
    padding: 0 15px;
}
.column-faq__q:focus {
    outline: none;
}

/* --------------------------------------------
   FAQセクション（AEO対策）
   -------------------------------------------- */
.column-faq {
    margin-top: 60px;
    padding-top: 60px;
    border-top: 1px solid #eee;
}

.column-faq .headline02 {
    text-align: center;
    margin-bottom: 40px;
}

.column-faq__item {
    margin-bottom: 20px;
    border: 1px solid #eee;
    border-radius: 8px;
    overflow: hidden;
}

.column-faq__q,
.column-faq__a {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    /* padding: 20px; */
}

.column-faq__q {
    background: #f9f9f9;
    cursor: pointer;
}

.column-faq__q p {
    margin: 0;
    font-weight: 600;
    font-size: 16px;
    color: #474747;
    line-height: 1.6;
}

.column-faq__a {
    background: #fff;
}

.column-faq__a p {
    margin: 0;
    font-size: 15px;
    color: #555;
    line-height: 1.8;
}

.column-faq__icon {
    flex-shrink: 0;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 700;
    color: #fff;
    background: #ff8c00;
    border-radius: 50%;
}

.column-faq__icon--a {
    background: #8cc919;
}

/* --------------------------------------------
   サイドバー共通
   -------------------------------------------- */
   .sidebar-box {
    background: #fff;
    border: 1px solid #eee;
    border-radius: 8px;
    padding: 25px;
    margin-bottom: 25px;
}

.sidebar-box__title {
    font-size: 16px;
    font-weight: 700;
    color: #474747;
    margin: 0 0 20px;
    padding-bottom: 12px;
    border-bottom: 3px solid #ff8c00;
}

/* --------------------------------------------
   人気記事ランキング
   -------------------------------------------- */
.sidebar-ranking {
    list-style: none;
    margin: 0;
    padding: 0;
    counter-reset: ranking;
}

.sidebar-ranking li {
    border-bottom: 1px solid #f0f0f0;
}

.sidebar-ranking li:last-child {
    border-bottom: none;
}

.sidebar-ranking a {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 12px 0;
    text-decoration: none;
    color: #474747;
    font-size: 14px;
    line-height: 1.5;
    transition: color 0.3s ease;
}

.sidebar-ranking a:hover {
    color: #ff8c00;
}

.sidebar-ranking__num {
    flex-shrink: 0;
    width: 26px;
    height: 26px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 700;
    color: #fff;
    background: #999;
    border-radius: 50%;
}

.sidebar-ranking li:nth-child(1) .sidebar-ranking__num {
    background: #ff8c00;
}

.sidebar-ranking li:nth-child(2) .sidebar-ranking__num {
    background: #8cc919;
}

.sidebar-ranking li:nth-child(3) .sidebar-ranking__num {
    background: #b87333;
}

.sidebar-ranking__text {
    flex: 1;
}


/* --------------------------------------------
   レスポンシブ
   -------------------------------------------- */
   @media screen and (max-width: 1024px) {
    .column-wrapper {
        flex-direction: column;
    }

    .column-sidebar {
        width: 100%;
        display: flex;
        flex-wrap: wrap;
        gap: 20px;
    }

    .sidebar-box {
        flex: 1;
        min-width: 280px;
        margin-bottom: 0;
    }

    .sidebar-cta {
        width: 100%;
    }
}
/* --------------------------------------------
   FAQセクション（AEO対策）アコーディオン
   -------------------------------------------- */
   .column-faq {
    margin-top: 60px;
    padding-top: 60px;
    border-top: 1px solid #eee;
}

.column-faq .headline02 {
    text-align: center;
    margin-bottom: 40px;
}

.column-faq__item {
    margin-bottom: 15px;
    border: 1px solid #eee;
    border-radius: 8px;
    overflow: hidden;
    background: #fff;
}

.column-faq__q {
    display: flex;
    align-items: center;
    gap: 15px;
    width: 100%;
    padding: 20px;
    background: #f9f9f9;
    border: none;
    border-bottom: 1px solid #eee;
    cursor: pointer;
    text-align: left;
    font-family: inherit;
    transition: background 0.3s ease;
    color: #474747;
    text-decoration: none;
}
.column-faq__item:not(.is-open) .column-faq__q {
    border-bottom: none;
}

.column-faq__q:hover {
    background: #ffe2bf;
}

.column-faq__q p {
    flex: 1;
    margin: 0;
    font-weight: 600;
    font-size: 16px;
    color: #474747;
    line-height: 1.6;
}

.column-faq__arrow {
    width: 12px;
    height: 12px;
    border-right: 2px solid #999;
    border-bottom: 2px solid #999;
    transform: rotate(45deg);
    transition: transform 0.3s ease;
    flex-shrink: 0;
}

.column-faq__item.is-open .column-faq__arrow {
    transform: rotate(-135deg);
}

.column-faq__a {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
    background: #fff;
}

.column-faq__item.is-open .column-faq__a {
    max-height: 500px;
}

.column-faq__a-inner {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    padding: 20px;
}

.column-faq__a-inner p {
    margin: 0;
    font-size: 15px;
    color: #555;
    line-height: 1.8;
}

.column-faq__icon {
    flex-shrink: 0;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 700;
    color: #fff;
    background: #ff8c00;
    border-radius: 50%;
}

.column-faq__icon--a {
    background: #8cc919;
}


/* ============================================
   記事詳細ページ
   ============================================ */

/* 記事ヘッダー */
.article-header {
    margin-bottom: 40px;
}

.article-header__meta {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.article-header__cat {
    display: inline-block;
    padding: 4px 14px;
    font-size: 12px;
    font-weight: 600;
    border-radius: 20px;
    background: #ffe2bf;
    color: #ff8c00;
}

.article-header__cat--prevention { background: #e8f5d0; color: #6ba312; }
.article-header__cat--caries { background: #ffe2bf; color: #ff8c00; }
.article-header__cat--perio { background: #fde8e8; color: #c92a2a; }
.article-header__cat--ortho { background: #f0edfc; color: #7048e8; }
.article-header__cat--implant { background: #e2f0fb; color: #1971c2; }
.article-header__cat--whitening { background: #fff0e6; color: #e8590c; }
.article-header__cat--child { background: #fce4ec; color: #d6336c; }

.article-header__date {
    font-size: 13px;
    color: #999;
}

.article-header__date-label {
    margin-right: 5px;
    color: #bbb;
}

.article-header__thumb {
    border-radius: 8px;
    overflow: hidden;
}

.article-header__thumb img {
    width: 100%;
    height: auto;
    display: block;
}

/* 記事本文 */
.article-body {
    font-size: 16px;
    line-height: 1.9;
    color: #474747;
}

.article-body h2 {
    font-size: 24px;
    font-weight: 700;
    color: #474747;
    margin: 50px 0 25px;
    padding: 12px 0 12px 18px;
    border-left: 4px solid #ff8c00;
    background: linear-gradient(to right, #fffaf5 0%, transparent 100%);
}

.article-body h3 {
    font-size: 20px;
    font-weight: 700;
    color: #474747;
    margin: 40px 0 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid #ffe2bf;
}

.article-body h4 {
    font-size: 18px;
    font-weight: 700;
    color: #474747;
    margin: 30px 0 15px;
}

.article-body p {
    margin: 0 0 20px;
}

.article-body ul,
.article-body ol {
    margin: 0 0 25px;
    padding-left: 25px;
}

.article-body li {
    margin-bottom: 10px;
}

.article-body img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
}

.article-body a {
    color: #ff8c00;
    text-decoration: underline;
}

.article-body a:hover {
    text-decoration: none;
}

/* リード文 */
.article-lead {
    font-size: 17px;
    line-height: 2;
    color: #474747;
    margin-bottom: 35px;
    padding: 25px;
    background: #f9f9f9;
    border-radius: 8px;
}

/* 目次 */
.article-toc {
    margin: 30px 0 40px;
    padding: 25px 30px;
    background: #fff;
    border: 1px solid #eee;
    border-radius: 8px;
}

.article-toc__title {
    font-size: 16px;
    font-weight: 700;
    color: #474747;
    margin: 0 0 15px;
    padding-bottom: 10px;
    border-bottom: 2px solid #ff8c00;
}

.article-toc__list {
    margin: 0;
    padding-left: 20px;
}

.article-toc__list li {
    margin-bottom: 8px;
}

.article-toc__list a {
    color: #474747;
    text-decoration: none;
    transition: color 0.3s ease;
}

.article-toc__list a:hover {
    color: #ff8c00;
}

/* 画像キャプション */
.article-figure {
    margin: 30px 0;
    text-align: center;
}

.article-figure img {
    display: block;
    margin: 0 auto;
}

.article-figure figcaption {
    font-size: 13px;
    color: #888;
    margin-top: 10px;
}

/* ボックス（注意・ポイント） */
.article-box {
    margin: 30px 0;
    padding: 25px;
    border-radius: 8px;
}

.article-box--warning {
    background: #fff8f0;
    border: 1px solid #ffe0b2;
}

.article-box--point {
    background: #f0f9ff;
    border: 1px solid #b3e0ff;
}

.article-box__title {
    font-size: 16px;
    font-weight: 700;
    color: #474747;
    margin: 0 0 15px;
}

.article-box ul {
    margin: 0;
    padding-left: 20px;
}

.article-box p:last-child {
    margin-bottom: 0;
}

/* 記事下CTA */
.article-cta {
    margin: 50px 0;
    padding: 35px;
    background: linear-gradient(135deg, #ff8c00 0%, #ffa640 100%);
    border-radius: 12px;
    text-align: center;
    color: #fff;
}

.article-cta__title {
    font-size: 20px;
    font-weight: 700;
    margin: 0 0 10px;
}

.article-cta__text {
    font-size: 14px;
    margin: 0 0 25px;
    opacity: 0.95;
}

.article-cta__btns {
    display: flex;
    justify-content: center;
    gap: 15px;
    flex-wrap: wrap;
}

.article-cta__btn {
    display: inline-block;
    padding: 14px 35px;
    font-size: 15px;
    font-weight: 600;
    border-radius: 30px;
    text-decoration: none;
    transition: all 0.3s ease;
}

.article-cta__btn--primary {
    background: #fff;
    color: #ff8c00;
}

.article-cta__btn--primary:hover {
    background: #ffe2bf;
    transform: translateY(-2px);
}

.article-cta__btn--secondary {
    background: transparent;
    color: #fff;
    border: 2px solid #fff;
}

.article-cta__btn--secondary:hover {
    background: rgba(255,255,255,0.15);
}

/* 前後の記事 */
.article-nav {
    display: flex;
    gap: 20px;
    margin: 40px 0;
}

.article-nav__prev,
.article-nav__next {
    flex: 1;
    display: block;
    padding: 20px;
    background: #f9f9f9;
    border-radius: 8px;
    text-decoration: none;
    color: #474747;
    transition: background 0.3s ease;
}

.article-nav__prev:hover,
.article-nav__next:hover {
    background: #ffe2bf;
}

.article-nav__next {
    text-align: right;
}

.article-nav__label {
    display: block;
    font-size: 12px;
    color: #999;
    margin-bottom: 5px;
}

.article-nav__title {
    font-size: 14px;
    font-weight: 600;
    line-height: 1.5;
}

/* 一覧に戻る */
.article-back {
    text-align: center;
    margin: 40px 0;
}

.article-back__link {
    display: inline-block;
    padding: 12px 30px;
    font-size: 14px;
    color: #666;
    background: #f5f5f5;
    border: 1px solid #ddd;
    border-radius: 30px;
    text-decoration: none;
    transition: all 0.3s ease;
}

.article-back__link:hover {
    background: #fff;
    border-color: #ff8c00;
    color: #ff8c00;
}




/* --------------------------------------------
   レスポンシブ
   -------------------------------------------- */
   @media screen and (max-width: 1024px) {
    .column-wrapper {
        flex-direction: column;
    }

    .column-sidebar {
        width: 100%;
        display: flex;
        flex-wrap: wrap;
        gap: 20px;
    }

    .sidebar-box {
        flex: 1;
        min-width: 280px;
        margin-bottom: 0;
    }

    .sidebar-cta {
        width: 100%;
    }
}

@media screen and (max-width: 768px) {
    .column-sidebar {
        flex-direction: column;
    }

    .sidebar-box {
        min-width: auto;
    }

    /* 記事詳細レスポンシブ */
    .article-body h2 {
        font-size: 20px;
        margin: 40px 0 20px;
    }

    .article-body h3 {
        font-size: 18px;
        margin: 30px 0 15px;
    }

    .article-lead {
        font-size: 15px;
        padding: 20px;
    }

    .article-toc {
        padding: 20px;
    }

    .article-cta {
        padding: 25px 20px;
    }

    .article-cta__title {
        font-size: 18px;
    }

    .article-cta__btns {
        flex-direction: column;
    }

    .article-cta__btn {
        width: 100%;
        text-align: center;
    }

    .article-nav {
        flex-direction: column;
    }

    .article-nav__next {
        text-align: left;
    }

    .column-filter {
        gap: 8px;
        margin-bottom: 30px;
    }

    .column-filter__btn {
        padding: 6px 14px;
        font-size: 12px;
    }

    .column-item {
        flex-direction: column;
        gap: 0;
    }

    .column-item__thumb {
        width: 100%;
        height: 200px;
    }

    .column-item__body {
        padding: 20px;
    }

    .column-item__title {
        font-size: 16px;
    }

    .column-item__excerpt {
        font-size: 13px;
    }

    .column-pagination a,
    .column-pagination span {
        min-width: 36px;
        height: 36px;
        font-size: 13px;
    }

    .column-faq__q {
        padding: 15px;
        gap: 12px;
    }

    .column-faq__q p {
        font-size: 14px;
    }

    .column-faq__a-inner {
        padding: 15px;
        gap: 12px;
    }

    .column-faq__a-inner p {
        font-size: 14px;
    }

    .column-faq__icon {
        width: 26px;
        height: 26px;
        font-size: 12px;
    }

    .column-faq__arrow {
        width: 10px;
        height: 10px;
    }
}

@media screen and (max-width: 480px) {
    .column-filter__btn {
        padding: 5px 12px;
        font-size: 11px;
    }

    .column-item__thumb {
        height: 180px;
    }

    .column-item__body {
        padding: 15px;
    }

    .column-item__title {
        font-size: 15px;
    }
}
 /* 画像テキスト横並び */
 .article-row {
    display: flex;
    gap: 30px;
    align-items: flex-start;
}

.article-row__text {
    flex: 1;
}

.article-row__img {
    flex-shrink: 0;
    width: 40%;
    margin: 0;
}

/* 768px以下のモバイルでは縦積みに戻す： */
@media screen and (max-width: 768px) {
    .article-row {
        flex-direction: column;
    }

    .article-row__img {
        width: 100%;
    }
}

@media screen and (min-width: 769px) {
.mt-35{
    margin-top: 35px;
}
}