@charset "UTF-8";

.sub-mv {
    position: relative;
    width: 100%;
    height: 400px;
    overflow: hidden;
}

.sub-mv-bg {
    width: 100%;
    height: 100%;
}

.sub-mv-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center 70%;
    display: block;
    transform: rotate(0.2deg) scale(1.01);
}

.site-header {
    background: rgba(11, 20, 32, 0.4);
}

.knowledge-coming-soon {
    display: none;
    background: #f6f6f4;
    color: #333333;
    padding: 112px 24px;
}

.knowledge-page.is-coming-soon .knowledge-coming-soon {
    display: block;
}

.knowledge-page.is-coming-soon .knowledge-detail-section,
.knowledge-page.is-coming-soon .knowledge-archive-section {
    display: none;
}

.knowledge-coming-soon-inner {
    max-width: 900px;
    margin: 0 auto;
    padding: 64px 32px;
    border-top: 1px solid #cbd3da;
    border-bottom: 1px solid #cbd3da;
    text-align: center;
}

.knowledge-coming-soon-kicker {
    margin-bottom: 18px;
    color: #315b80;
    font-family: sans-serif;
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.3em;
}

.knowledge-coming-soon-title {
    margin-bottom: 22px;
    font-family: 'Zen Old Mincho', serif;
    font-size: clamp(1.5rem, 2.6vw, 2rem);
    font-weight: 400;
    letter-spacing: 0.14em;
    line-height: 1.6;
}

.knowledge-coming-soon-copy {
    max-width: 680px;
    margin: 0 auto;
    color: #556777;
    font-size: 0.96rem;
    line-height: 2.1;
    letter-spacing: 0.05em;
}

.knowledge-detail-section {
    background-color: #556777;
    padding: 100px 0;
    color: #333333;
}

.knowledge-detail-inner {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 40px;
}

.knowledge-detail-container {
    display: flex;
    align-items: flex-start;
    gap: 60px;
    background-color: #ffffff;
    padding: 50px;
    border: 1px solid #d1d5db;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
}

.knowledge-detail-left {
    flex: 0 0 380px;
}

.main-thumb-frame {
    position: relative;
    aspect-ratio: 16 / 10;
    margin-bottom: 20px;
}

.main-thumb-frame img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    clip-path: polygon(20px 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%, 0 20px);
}

.main-thumb-frame::before,
.main-thumb-frame::after {
    content: '';
    position: absolute;
    width: 48px;
    height: 1.5px;
    background-color: #333333;
    z-index: 5;
    pointer-events: none;
}

.main-thumb-frame::before {
    top: 10px;
    left: 10px;
    transform: translate(-50%, -50%) rotate(-45deg);
}

.main-thumb-frame::after {
    bottom: 10px;
    right: 10px;
    transform: translate(50%, 50%) rotate(-45deg);
}

.main-article-meta {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 12px;
}

.article-date {
    font-size: 0.85rem;
    color: #777777;
    letter-spacing: 0.05em;
}

.main-article-title {
    font-family: 'Zen Old Mincho', serif;
    font-size: 1rem;
    font-weight: 500;
    line-height: 1.7;
    letter-spacing: 0.08em;
}

.knowledge-detail-right {
    flex: 1;
    height: 480px;
    overflow-y: auto;
    padding-right: 24px;
    box-sizing: border-box;
}

.custom-scrollbar::-webkit-scrollbar {
    width: 6px;
}

.custom-scrollbar::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 10px;
}

.custom-scrollbar::-webkit-scrollbar-thumb {
    background: #b0b7c0;
    border-radius: 10px;
}

.custom-scrollbar::-webkit-scrollbar-thumb:hover {
    background: #1b355a;
}

.article-body .lead-text {
    font-size: 0.9rem;
    font-weight: 500;
    line-height: 2.1;
    color: #333333;
    background-color: #f8f9fa;
    padding: 20px;
    border-left: 3px solid #333333;
    margin-bottom: 24px;
}

.article-body p {
    font-size: 0.9rem;
    line-height: 2.2;
    letter-spacing: 0.06em;
    color: #444444;
    margin-bottom: 1.8em;
}

.article-body h3 {
    font-family: 'Zen Old Mincho', serif;
    font-size: 1.15rem;
    font-weight: 500;
    color: #333333;
    letter-spacing: 0.08em;
    margin: 32px 0 16px;
    padding-bottom: 8px;
    border-bottom: 1px solid #d1d5db;
}

.knowledge-archive-section {
    background-color: #ffffff;
    color: #333333;
    padding: 100px 0;
}

.knowledge-archive-section .knowledge-title {
    color: #333333;
}

.knowledge-archive-section .knowledge-title::after {
    background-color: #333333;
}

.knowledge-archive-section .knowledge-lead {
    color: #555555;
}

.knowledge-archive-section .card-title {
    color: #333333;
}

.knowledge-archive-section .slits-frame::before,
.knowledge-archive-section .slits-frame::after {
    background-color: #333333;
}

.knowledge-archive-section .knowledge-divider {
    background-color: #d1d5db;
}

.knowledge-archive-section .x-account-name,
.knowledge-archive-section .x-desc,
.knowledge-archive-section .x-icon {
    color: #333333;
}

.knowledge-archive-section .x-line {
    background-color: #d1d5db;
}

.knowledge-archive-section .x-timeline-card {
    background-color: #e2e2e2;
}

.knowledge-archive-section .btn-white-round {
    background-color: #ffffff;
    border: 1px solid #333333;
    color: #333333;
}

.knowledge-archive-section .btn-white-round:hover {
    background-color: #2b4c6f;
    border-color: #2b4c6f;
    color: #ffffff;
}

.knowledge-archive-section .knowledge-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    margin-bottom: 80px;
}

.ac-contact {
    background-color: #556777;
    color: #ffffff;
}

.ac-contact .ac-contact-title,
.ac-contact .ac-sub-title,
.ac-contact .ac-lead {
    color: #ffffff;
}

.ac-contact .ac-contact-title::after {
    background-color: #ffffff;
}

.ac-contact .btn-outline-sm {
    background-color: #ffffff;
    border-color: transparent;
    color: #1b355a;
}

.ac-contact .btn-outline-sm .arrow {
    color: #1b355a;
}

.ac-contact .btn-outline-sm:hover {
    background-color: #2b4c6f;
    border-color: #2b4c6f;
    color: #ffffff;
}

.ac-contact .btn-outline-sm:hover .arrow {
    color: #ffffff;
}

@media (max-width: 900px) {
    .knowledge-detail-container {
        flex-direction: column;
        padding: 30px 24px;
        gap: 36px;
    }

    .knowledge-detail-left {
        width: 100%;
        flex: none;
    }

    .knowledge-detail-right {
        width: 100%;
        height: 380px;
        padding-right: 12px;
    }

    .knowledge-archive-section .knowledge-grid {
        grid-template-columns: 1fr;
        gap: 36px;
    }
}

@media (max-width: 768px) {
    .site-header {
        background: rgba(0, 0, 0, 0.28);
    }

    .ac-overlay-svg text {
        font-size: 34px;
        letter-spacing: 3px;
    }

    .knowledge-page .ac-contact {
        background-color: #ffffff;
        color: #333333;
    }

    .knowledge-page .ac-contact .ac-contact-title,
    .knowledge-page .ac-contact .ac-sub-title,
    .knowledge-page .ac-contact .ac-lead {
        color: #333333;
    }

    .knowledge-page .ac-contact .ac-sub-title {
        color: #1b355a;
    }

    .knowledge-page .ac-contact .ac-contact-title::after {
        background-color: #333333;
    }

    .knowledge-page .ac-contact .btn-outline-sm {
        background-color: #ffffff;
        border-color: #333333;
        color: #333333;
    }

    .knowledge-page .ac-contact .btn-outline-sm .arrow {
        color: #333333;
    }

    .sub-mv {
        height: 240px;
    }

    .knowledge-coming-soon {
        padding: 72px 24px;
    }

    .knowledge-coming-soon-inner {
        padding: 44px 8px;
    }

    .knowledge-coming-soon-kicker {
        margin-bottom: 14px;
        font-size: 0.62rem;
    }

    .knowledge-coming-soon-title {
        margin-bottom: 16px;
        font-size: 1.25rem;
        letter-spacing: 0.08em;
    }

    .knowledge-coming-soon-copy {
        font-size: 0.9rem;
        line-height: 2;
        letter-spacing: 0.04em;
    }

    .knowledge-container {
        padding: 0 24px;
    }

    .x-info {
        text-align: center;
        padding-left: 0;
    }

    .x-logo-title {
        justify-content: center;
        gap: 12px;
        margin-bottom: 24px;
    }

    .x-line {
        max-width: 260px;
        margin: 0 auto 24px;
    }

    .x-icon {
        font-size: 2.4rem;
    }

    .x-account-name {
        font-size: 1.1rem;
        letter-spacing: 0.1em;
    }

    .x-desc {
        font-size: 0.9rem;
        line-height: 2;
        letter-spacing: 0.08em;
        text-align: center;
        margin-bottom: 36px;
    }

    .btn-white-round {
        font-size: 0.88rem;
        letter-spacing: 0.08em;
    }

    .knowledge-detail-section,
    .knowledge-archive-section {
        padding: 60px 0;
    }

    .knowledge-archive-section .knowledge-grid {
        justify-items: center;
    }

    .knowledge-archive-section .knowledge-title::after {
        height: 1px;
    }

    .main-article-title,
    .article-body .lead-text,
    .article-body p {
        font-size: 0.9rem;
        line-height: 2;
        letter-spacing: 0.08em;
    }

    .article-body h3 {
        font-size: 1.12rem;
        line-height: 1.4;
        letter-spacing: 0.08em;
    }
}