/* =========================================================================
   ブランドコンセプト（トップページ用）
   ========================================================================= */
html {
    scroll-behavior: smooth;
}

.concept-block {
    color: var(--color-text);
}

/* アンカースクロール先の上オフセット */
#about,
#concept,
#promises,
#trust {
    scroll-margin-top: 20px;
}

.concept-block .container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ブロック全体タイトル */
.concept-block__header {
    padding: 70px 0 0;
    background-color: var(--color-white);
    text-align: center;
}

.concept-block__overline {
    font-family: var(--font-heading);
    font-size: 0.85rem;
    letter-spacing: 0.3em;
    color: var(--color-primary-dark);
    margin: 0 0 14px;
    font-weight: 600;
}

.concept-block__heading {
    font-family: var(--font-heading);
    font-size: 2.4rem;
    font-weight: 700;
    margin: 0;
    padding-bottom: 18px;
    color: var(--color-text);
    letter-spacing: 0.04em;
    position: relative;
    display: inline-block;
}

.concept-block__heading::after {
    content: '';
    display: block;
    width: 50px;
    height: 2px;
    background-color: var(--color-primary);
    margin: 18px auto 0;
}

/* セクション番号ラベル共通 */
.concept-section-number {
    font-family: var(--font-heading);
    font-size: 0.95rem;
    color: var(--color-primary-dark);
    letter-spacing: 0.08em;
    margin-bottom: 14px;
    font-weight: 600;
}

.concept-section-number span {
    color: var(--color-text);
    font-weight: 500;
}

.concept-section-number--center {
    text-align: center;
    margin-bottom: 16px;
}

/* ===== 01 コンセプト ===== */
.concept-block__01 {
    padding: 50px 0 80px;
    background-color: var(--color-white);
}

.concept-01__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.concept-01__title {
    font-family: var(--font-heading);
    font-size: 2.4rem;
    font-weight: 700;
    line-height: 1.4;
    margin: 0 0 24px;
    color: var(--color-text);
    letter-spacing: 0.02em;
}

.concept-01__lead {
    font-size: 1rem;
    line-height: 1.9;
    margin: 0 0 28px;
    color: var(--color-text);
}

.concept-01__body {
    font-size: 0.95rem;
    line-height: 2.1;
    color: var(--color-text);
}

.concept-01__body p {
    margin: 0;
}

.concept-01__image {
    border-radius: 12px;
    overflow: hidden;
    background-color: var(--color-bg);
    aspect-ratio: 4 / 3;
}

.concept-01__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

/* ===== 02 3つの約束 ===== */
.concept-block__02 {
    padding: 80px 0;
    background-color: var(--color-bg);
}

.concept-02__title {
    font-family: var(--font-heading);
    font-size: 2.2rem;
    font-weight: 700;
    text-align: center;
    margin: 0 0 50px;
    color: var(--color-text);
    letter-spacing: 0.04em;
}

.concept-02__cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.promise-item {
    position: relative;
    background-color: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    padding: 50px 24px 32px;
    text-align: center;
}

.promise-item__num {
    position: absolute;
    top: -16px;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--color-primary);
    color: var(--color-white);
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 0.85rem;
    letter-spacing: 0.05em;
}

.promise-item__icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 16px;
    border-radius: 50%;
    background-color: var(--color-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
    font-size: 1.6rem;
}

.promise-item__title {
    font-family: var(--font-heading);
    font-size: 1.15rem;
    font-weight: 700;
    margin: 0 0 14px;
    color: var(--color-text);
}

.promise-item__text {
    font-size: 0.88rem;
    line-height: 1.85;
    color: var(--color-text-light);
    margin: 0;
}

/* ===== 03 安心へのこだわり ===== */
.concept-block__03 {
    padding: 80px 0;
    background-color: var(--color-white);
}

.concept-03__title {
    font-family: var(--font-heading);
    font-size: 2.2rem;
    font-weight: 700;
    text-align: center;
    margin: 0 0 50px;
    color: var(--color-text);
    letter-spacing: 0.04em;
}

.concept-03__cards {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 22px;
}

.trust-item {
    text-align: center;
}

.trust-item__image {
    border-radius: 12px;
    overflow: hidden;
    aspect-ratio: 4 / 3;
    background-color: var(--color-bg);
    margin-bottom: 16px;
}

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

.trust-item__icon {
    width: 48px;
    height: 48px;
    margin: -36px auto 12px;
    border-radius: 50%;
    background-color: var(--color-primary);
    color: var(--color-white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    border: 3px solid var(--color-white);
    position: relative;
    z-index: 1;
}

.trust-item__title {
    font-family: var(--font-heading);
    font-size: 1.05rem;
    font-weight: 700;
    margin: 0 0 10px;
    color: var(--color-text);
    line-height: 1.5;
}

.trust-item__text {
    font-size: 0.82rem;
    line-height: 1.8;
    color: var(--color-text-light);
    margin: 0;
    text-align: left;
}

/* ===== レスポンシブ ===== */
@media (max-width: 992px) {
    .concept-01__grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .concept-02__cards {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .concept-03__cards {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
    }

    .concept-01__title,
    .concept-02__title,
    .concept-03__title {
        font-size: 1.8rem;
    }
}

@media (max-width: 600px) {
    .concept-block__01,
    .concept-block__02,
    .concept-block__03 {
        padding: 50px 0;
    }

    .concept-03__cards {
        grid-template-columns: 1fr;
    }

    .concept-01__title {
        font-size: 1.6rem;
    }
}