/* ---------- コラム一覧（ガイド型） ---------- */
.column-guide {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 88px 48px 120px;
}
.column-group + .column-group {
    margin-top: 96px;
    padding-top: 80px;
    border-top: 1px solid var(--line);
}
.column-group__head {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.4fr);
    gap: 48px;
    align-items: end;
    margin-bottom: 40px;
}
.column-group__eyebrow {
    font-family: var(--font-heading);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.16em;
    color: var(--sky);
    margin: 0 0 14px;
}
.column-group__title {
    font-weight: 900;
    font-size: clamp(1.5rem, 1.3rem + 0.9vw, 2rem);
    line-height: 1.5;
    color: var(--ink);
    margin: 0;
}
.column-group__lead {
    font-size: 0.98rem;
    line-height: 1.9;
    color: var(--ink-mute);
    margin: 0;
}

/* グループ1：大1＋小2 */
.column-lead-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    gap: 40px;
}
/* PC：右列は左の大カードの高さに合わせ、はみ出した分はスクロール */
.column-lead-side { position: relative; }
.column-lead-side::after {
    content: "";
    position: absolute;
    left: 0; right: 16px; bottom: 0;
    height: 56px;
    background: linear-gradient(to bottom, rgba(255,255,255,0), #fff);
    pointer-events: none;
}
.column-lead-side__scroll {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    gap: 40px;
    overflow-y: auto;
    overscroll-behavior: contain;
    padding: 0 16px 56px 0;
    scrollbar-width: thin;
    scrollbar-color: var(--line-strong) transparent;
}
.column-lead-side.is-end::after { opacity: 0; }
.column-lead-side::after { transition: opacity 0.3s; }
.column-lead-side__more {
    position: absolute;
    left: 50%;
    bottom: 8px;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    margin-left: -30px; /* スクロールバー分の余白を除いた中央 */
    padding: 0;
    border: none;
    border-radius: 50%;
    background: rgba(22, 50, 74, 0.72);
    color: #fff;
    cursor: pointer;
    animation: column-more-blink 1.6s ease-in-out infinite;
    transition: background 0.2s;
}
.column-lead-side__more:hover,
.column-lead-side__more:focus-visible { animation: none; opacity: 1; background: var(--navy); }
.column-lead-side__more[hidden] { display: none; }
@keyframes column-more-blink { 0%, 100% { opacity: 1; } 50% { opacity: 0.45; } }
@media (prefers-reduced-motion: reduce) { .column-lead-side__more { animation: none; } }
.column-lead-side__scroll::-webkit-scrollbar { width: 6px; }
.column-lead-side__scroll::-webkit-scrollbar-thumb { background: var(--line-strong); border-radius: 3px; }
.column-lead-side__scroll:focus-visible { outline: 2px solid var(--sky); outline-offset: 4px; }

/* グループ2：4列 */
.column-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 32px 28px;
}

.column-card {
    display: block;
    color: inherit;
    text-decoration: none;
}
.column-card__img { overflow: hidden; margin-bottom: 18px; background: var(--cream); }
.column-card__img img {
    display: block;
    width: 100%;
    height: auto;
    aspect-ratio: 16 / 9;
    object-fit: cover;
    transition: transform 0.6s cubic-bezier(0.165, 0.84, 0.44, 1);
}
.column-card:hover .column-card__img img { transform: scale(1.04); }
.column-card__meta {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    justify-content: space-between;
    gap: 4px 12px;
    margin: 0 0 8px;
}
.column-card__kw {
    font-size: 0.74rem;
    color: var(--sky);
    font-weight: 700;
    letter-spacing: 0.04em;
}
.column-card__date {
    font-size: 0.72rem;
    color: var(--ink-faint);
    letter-spacing: 0.02em;
}
.column-card__title {
    font-size: 1rem;
    font-weight: 700;
    line-height: 1.7;
    color: var(--ink);
    margin: 0 0 10px;
}
.column-card__desc {
    font-size: 0.86rem;
    line-height: 1.8;
    color: var(--ink-mute);
    margin: 0;
}
.column-card--large .column-card__title {
    font-size: clamp(1.2rem, 1.05rem + 0.6vw, 1.5rem);
    font-weight: 900;
    line-height: 1.6;
    margin-bottom: 14px;
}
.column-card--large .column-card__desc { font-size: 0.96rem; line-height: 1.9; }
.column-card--side {
    display: grid;
    grid-template-columns: 168px minmax(0, 1fr);
    column-gap: 20px;
    align-content: start;
}
.column-card--side .column-card__img { grid-row: 1 / span 3; margin-bottom: 0; align-self: start; }
.column-card--side .column-card__img img { aspect-ratio: 4 / 3; }
.column-card--side .column-card__desc { font-size: 0.82rem; }

@media (max-width: 1080px) {
    .column-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 40px 24px; }
}
@media (max-width: 900px) {
    .column-guide { padding: 56px 24px 80px; }
    .column-group + .column-group { margin-top: 64px; padding-top: 56px; }
    .column-group__head { grid-template-columns: 1fr; gap: 16px; margin-bottom: 32px; }
    .column-lead-grid { grid-template-columns: 1fr; gap: 40px; }
    .column-lead-side__scroll { position: static; overflow: visible; padding: 0; }
    .column-lead-side::after { display: none; }
    .column-lead-side__more { display: none !important; }
    .column-card--side { grid-template-columns: 1fr; }
    .column-card--side .column-card__img { grid-row: auto; margin-bottom: 18px; }
    .column-card--side .column-card__img img { aspect-ratio: 16 / 9; }
}
@media (max-width: 560px) {
    .column-grid { grid-template-columns: 1fr; }
}

/* ---------- HERO（service / flow / concept と同じ明るいトーンに上書き） ---------- */
body#about-columns .inner-hero__bg {
    opacity: 0.96;
}
body#about-columns .inner-hero__overlay {
    background: linear-gradient(
        100deg,
        rgba(255, 255, 255, 0.92) 0%,
        rgba(255, 255, 255, 0.66) 42%,
        rgba(255, 255, 255, 0.22) 74%,
        rgba(255, 255, 255, 0) 100%
    );
}
body#about-columns .inner-hero__eyebrow {
    color: var(--sky);
}
body#about-columns .inner-hero__title {
    color: var(--ink);
}
body#about-columns .inner-hero__lead {
    color: var(--ink-mute);
}