/* サービス説明（about）— シンプル・モバイル優先・タイポ4段 */

.about-page {
    --about-bg: #f4f6f8;
    --about-surface: #ffffff;
    --about-text: #212529;
    --about-muted: #6c757d;
    --about-accent: #0d9488;
    --about-accent-soft: rgba(13, 148, 136, 0.1);
    --about-border: #e9ecef;
    background: var(--about-bg);
    padding-bottom: 3rem;
}

.about-hero {
    background: linear-gradient(145deg, #343a40 0%, #495057 55%, #6c757d 100%);
    color: #fff;
    padding: 2.5rem 0;
}

.about-hero h1 {
    font-size: clamp(1.35rem, 4.5vw, 1.75rem);
    font-weight: 700;
    line-height: 1.35;
    margin-bottom: 0.75rem;
}

.about-hero .about-hero-lead {
    font-size: 1rem;
    opacity: 0.92;
    margin-bottom: 0.75rem;
    line-height: 1.6;
}

.about-hero .about-hero-stat {
    font-size: 0.875rem;
    opacity: 0.88;
    line-height: 1.65;
    margin-bottom: 0.5rem;
}

.about-hero .about-hero-source {
    font-size: 0.75rem;
    opacity: 0.8;
}

.about-hero .about-hero-source a {
    color: rgba(255, 255, 255, 0.92);
    text-decoration: underline;
}

.about-hero--compact {
    padding: 1.75rem 0;
}

.about-hero--compact h1 {
    margin-bottom: 0;
}

.about-hero-img {
    border-radius: 12px;
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.25);
    max-height: 220px;
    width: 100%;
    object-fit: cover;
}

.about-subnav-wrap {
    position: sticky;
    top: 0;
    z-index: 1010;
    margin-bottom: 0.25rem;
    background: var(--about-surface);
    border-bottom: 1px solid var(--about-border);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.about-subnav {
    display: flex;
    gap: 0.25rem;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    padding: 0.5rem 0;
}

.about-subnav::-webkit-scrollbar {
    display: none;
}

.about-subnav a {
    flex: 0 0 auto;
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--about-muted);
    text-decoration: none;
    border-radius: 999px;
    white-space: nowrap;
    transition: background 0.2s, color 0.2s;
}

.about-subnav a:hover {
    color: var(--about-text);
    background: var(--about-bg);
}

.about-subnav a.is-active {
    color: #fff;
    background: var(--about-accent);
}

.about-section {
    padding: 2rem 0 0;
}

.about-section h2 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--about-text);
    margin-bottom: 0.5rem;
}

.about-section .about-section-lead {
    font-size: 1rem;
    color: var(--about-muted);
    margin-bottom: 1.25rem;
}

.about-card {
    background: var(--about-surface);
    border: 1px solid var(--about-border);
    border-radius: 12px;
    padding: 1.25rem;
    height: 100%;
}

.about-card h3 {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--about-text);
}

.about-card p {
    font-size: 1rem;
    color: var(--about-muted);
    margin-bottom: 0.75rem;
    line-height: 1.55;
}

.about-badge {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.2rem 0.55rem;
    border-radius: 6px;
    background: var(--about-accent-soft);
    color: var(--about-accent);
}

.about-steps {
    list-style: none;
    padding: 0;
    margin: 0;
    counter-reset: about-step;
}

.about-steps li {
    counter-increment: about-step;
    position: relative;
    padding: 0.75rem 0 0.75rem 2.75rem;
    border-bottom: 1px solid var(--about-border);
    font-size: 1rem;
    color: var(--about-text);
    line-height: 1.5;
}

.about-steps li:last-child {
    border-bottom: none;
}

.about-steps li::before {
    content: counter(about-step);
    position: absolute;
    left: 0;
    top: 0.65rem;
    width: 1.75rem;
    height: 1.75rem;
    border-radius: 50%;
    background: var(--about-accent);
    color: #fff;
    font-size: 0.875rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
}

.about-quota-box {
    background: var(--about-surface);
    border: 1px solid var(--about-border);
    border-radius: 12px;
    padding: 1.25rem;
}

.about-quota-box p {
    font-size: 1rem;
    color: var(--about-muted);
    margin-bottom: 0.75rem;
    line-height: 1.55;
}

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

.about-pricing-wrap {
    background: var(--about-surface);
    border-radius: 12px;
    border: 1px solid var(--about-border);
    padding: 1.5rem 1rem;
}

.about-operator-wrap {
    padding-top: 2rem;
}

.about-operator-wrap .operator-section {
    padding: 0 !important;
    background: transparent !important;
}

.about-operator-wrap #operator-info {
    padding: 1.5rem !important;
}

.about-coming {
    text-align: center;
    padding: 3rem 1rem;
    background: var(--about-surface);
    border-radius: 12px;
    border: 1px solid var(--about-border);
}

.about-coming h2 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
}

.about-coming p {
    font-size: 1rem;
    color: var(--about-muted);
    margin-bottom: 1.25rem;
}

.about-section--emphasis {
    padding-top: 2.5rem;
}

.about-usecase-card {
    background: var(--about-surface);
    border: 1px solid var(--about-border);
    border-radius: 12px;
    padding: 1.25rem;
}

.about-usecase-icon {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 10px;
    background: var(--about-accent-soft);
    color: var(--about-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 0.75rem;
    font-size: 1.1rem;
}

.about-usecase-title {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--about-text);
    margin-bottom: 0.75rem;
}

.about-usecase-label {
    display: block;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--about-muted);
    text-transform: uppercase;
    letter-spacing: 0.02em;
    margin-bottom: 0.15rem;
}

.about-usecase-query,
.about-usecase-result {
    font-size: 0.875rem;
    color: var(--about-text);
    line-height: 1.5;
    margin-bottom: 0.65rem;
}

.about-usecase-benefit {
    font-size: 0.875rem;
    color: var(--about-accent);
    font-weight: 600;
    line-height: 1.45;
}

.about-cta-box {
    background: var(--about-surface);
    border: 1px solid var(--about-border);
    border-radius: 12px;
    padding: 2rem 1.25rem;
}

@media (max-width: 767.98px) {
    .about-usecase-card {
        margin-bottom: 0.25rem;
    }
}

/* 対応国一覧 */
.about-country-filter .form-control {
    max-width: 100%;
    font-size: 1rem;
}

.about-countries-table {
    background: var(--about-surface);
    border-radius: 12px;
    overflow: hidden;
    font-size: 0.875rem;
}

.about-countries-table thead th {
    background: var(--about-bg);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    color: var(--about-muted);
    border-bottom: 1px solid var(--about-border);
    white-space: nowrap;
}

.about-countries-table td,
.about-countries-table th[scope="row"] {
    vertical-align: top;
    line-height: 1.5;
    color: var(--about-text);
    border-color: var(--about-border);
}

.about-country-name {
    font-weight: 700;
    white-space: nowrap;
}

.about-country-card {
    background: var(--about-surface);
    border: 1px solid var(--about-border);
    border-radius: 12px;
    padding: 1rem 1.15rem;
    margin-bottom: 0.75rem;
}

.about-country-card-title {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
}

.about-country-dl dt {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--about-muted);
    text-transform: uppercase;
    margin-top: 0.5rem;
}

.about-country-dl dt:first-child {
    margin-top: 0;
}

.about-country-dl dd {
    font-size: 0.875rem;
    color: var(--about-text);
    margin-bottom: 0;
    margin-left: 0;
}

.about-planned-badge {
    font-size: 0.7rem;
    font-weight: 600;
    margin-right: 0.25rem;
}

.about-col-hint {
    font-size: 0.65rem;
    letter-spacing: 0;
    text-transform: none;
    color: var(--about-muted);
    margin-top: 0.15rem;
}

.about-ws-summary {
    background: var(--about-surface);
    border: 1px solid var(--about-border);
    border-radius: 12px;
    padding: 1rem 1.15rem;
}

.about-ws-summary-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem 0.5rem;
}

.about-ws-summary-chip {
    display: inline-block;
    font-size: 0.8rem;
    padding: 0.2rem 0.55rem;
    border-radius: 999px;
    border: 1px solid var(--about-border);
    background: var(--about-bg);
    color: var(--about-text);
    text-decoration: none;
    white-space: nowrap;
}

.about-ws-summary-chip:hover {
    border-color: var(--about-primary, #0d6efd);
    color: var(--about-primary, #0d6efd);
}

.about-ws-legend li {
    margin-bottom: 0.25rem;
}

.about-ws-cell .about-ws-features {
    display: flex;
    flex-wrap: wrap;
    gap: 0.3rem;
    margin-bottom: 0.45rem;
}

.about-ws-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.2rem;
    font-size: 0.7rem;
    font-weight: 700;
    line-height: 1.2;
    padding: 0.2rem 0.5rem;
    border-radius: 999px;
    border: 1px solid transparent;
    white-space: nowrap;
}

.about-ws-chip--live.about-ws-chip--web {
    color: #0b3d91;
    background: #e8f0fe;
    border-color: #c5d9f7;
}

.about-ws-chip--live.about-ws-chip--x_opinion {
    color: #0f5132;
    background: #d1e7dd;
    border-color: #a3cfbb;
}

.about-ws-chip--planned {
    color: var(--about-muted);
    background: var(--about-bg);
    border-color: var(--about-border);
    border-style: dashed;
    font-weight: 600;
}

.about-ws-chip-planned {
    font-weight: 600;
    opacity: 0.9;
}

.about-ws-desc {
    font-size: inherit;
    line-height: 1.5;
}

.about-countries-table .about-ws-cell {
    min-width: 12rem;
    max-width: 22rem;
}

@media (min-width: 768px) {
    .about-hero {
        padding: 3rem 0;
    }

    .about-hero-img {
        max-height: 280px;
    }

    .about-section {
        padding-top: 2.5rem;
    }
}

@media (max-width: 767.98px) {
    .about-hero .btn {
        width: 100%;
        margin-bottom: 0.5rem;
    }

    .about-hero .btn.me-3 {
        margin-right: 0 !important;
    }
}