/* ── PAGE HERO ── */
.page-hero {
    position: relative;
    height: 38vh;
    min-height: 260px;
    margin-top: var(--header-height);
    display: flex;
    align-items: flex-end;
    padding-bottom: 3rem;
    overflow: hidden;
    background: var(--color-bg-base);
}

.page-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 80% 60% at 60% 40%, rgba(255, 215, 0, 0.06) 0%, transparent 70%),
        linear-gradient(180deg, transparent 40%, var(--color-bg-base) 100%);
    z-index: 1;
}

.page-hero-rule {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0.5px;
    height: 80px;
    background: linear-gradient(180deg, transparent, var(--color-gold));
    opacity: 0.4;
}

.page-hero-content {
    position: relative;
    z-index: 2;
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 3rem;
}

.page-hero-eyebrow {
    font-size: 0.62rem;
    letter-spacing: 0.35em;
    color: var(--color-gold);
    text-transform: uppercase;
    margin-bottom: 0.6rem;
    opacity: 0.7;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.page-hero-eyebrow::before {
    content: '';
    width: 24px;
    height: 0.5px;
    background: var(--color-gold);
    display: inline-block;
    flex-shrink: 0;
}

.page-hero-title {
    font-family: var(--font-display);
    font-size: clamp(2.4rem, 5vw, 4rem);
    font-weight: 400;
    letter-spacing: 0.12em;
    color: var(--color-text-primary);
    line-height: 1.1;
}

@media (max-width: 768px) {
    .page-hero-content {
        padding: 0 1.25rem;
    }

    .page-hero {
        padding-bottom: 2rem;
    }
}


/* ── ABOUT SECTIONS ── */
.about-section {
    padding: 6rem 0;
}

.about-section+.about-section {
    border-top: 0.5px solid var(--color-gold-border);
}

.about-section.dark {
    background: #080808;
}

@media (max-width: 768px) {
    .about-section {
        padding: 4rem 0;
    }
}


/* ── CONCEPT ── */
.concept-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 5rem;
    align-items: center;
}

.concept-img-wrap {
    position: relative;
}

.concept-img-wrap img {
    width: 100%;
    aspect-ratio: 3/4;
    object-fit: cover;
    display: block;
}

.concept-img-deco {
    position: absolute;
    top: -1rem;
    left: -1rem;
    right: 1rem;
    bottom: 1rem;
    border: 0.5px solid rgba(255, 215, 0, 0.2);
    pointer-events: none;
}

.concept-lead {
    font-size: clamp(1rem, 2vw, 1.25rem);
    font-weight: 400;
    line-height: 2.1;
    color: var(--color-text-body);
    letter-spacing: 0.08em;
    margin-bottom: 1.5rem;
}

.concept-body {
    font-size: 0.82rem;
    line-height: 2.2;
    color: var(--color-text-body-sub);
    letter-spacing: 0.06em;
}

@media (max-width: 900px) {
    .concept-grid {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }

    .concept-img-wrap {
        max-width: 340px;
        margin: 0 auto;
    }

    .concept-img-wrap img {
        aspect-ratio: 4/3;
    }
}


/* ── INFO CARDS ── */
.info-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.5px;
    background: var(--color-gold-border);
    border: 0.5px solid var(--color-gold-border);
}

.info-card {
    background: var(--color-bg-base);
    padding: 2.8rem 2rem;
    text-align: center;
    transition: background var(--transition-base);
}

.info-card:hover {
    background: rgba(255, 215, 0, 0.03);
}

.info-card-icon {
    font-size: 1.3rem;
    margin-bottom: 1.2rem;
    color: var(--color-gold);
    opacity: 0.6;
    display: block;
}

.info-card-label {
    font-size: 0.58rem;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--color-text-faint);
    margin-bottom: 0.7rem;
}

.info-card-value {
    font-family: var(--font-display);
    font-size: 1.1rem;
    color: var(--color-text-body);
    letter-spacing: 0.1em;
    line-height: 1.6;
}

.info-card-value span {
    display: block;
    font-family: var(--font-serif-jp);
    font-size: 0.72rem;
    color: var(--color-text-faint);
    margin-top: 0.4rem;
    letter-spacing: 0.08em;
}

@media (max-width: 768px) {
    .info-cards {
        grid-template-columns: 1fr;
    }

    .info-card {
        padding: 2rem 1.5rem;
    }
}


/* ── RULES ── */
.rules-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem 5rem;
}

.rule-group-title {
    font-size: 0.58rem;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--color-gold);
    margin-bottom: 1.2rem;
    padding-bottom: 0.6rem;
    border-bottom: 0.5px solid var(--color-gold-border);
    opacity: 0.8;
}

.rule-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.rule-list li {
    font-size: 0.8rem;
    color: var(--color-text-body-sub);
    letter-spacing: 0.04em;
    line-height: 1.85;
    padding: 0.55rem 0;
    border-bottom: 0.5px solid rgba(255, 255, 255, 0.04);
    display: flex;
    gap: 0.8rem;
    align-items: flex-start;
}

.rule-list li::before {
    content: '–';
    color: var(--color-gold);
    opacity: 0.4;
    flex-shrink: 0;
    margin-top: 0.05rem;
}

@media (max-width: 768px) {
    .rules-grid {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }
}


/* ── ACCESS ── */
.access-block {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

.access-step {
    display: flex;
    gap: 1.2rem;
    align-items: flex-start;
    margin-bottom: 2rem;
}

.access-step:last-child {
    margin-bottom: 0;
}

.access-step-num {
    width: 30px;
    height: 30px;
    border: 0.5px solid var(--color-gold-border);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-size: 0.6rem;
    color: var(--color-gold);
    flex-shrink: 0;
    margin-top: 0.1rem;
    opacity: 0.8;
}

.access-step-title {
    font-size: 0.82rem;
    color: var(--color-text-body);
    letter-spacing: 0.08em;
    margin-bottom: 0.4rem;
}

.access-step-desc {
    font-size: 0.75rem;
    color: var(--color-text-body-sub);
    line-height: 1.9;
    letter-spacing: 0.04em;
}

.access-note {
    background: rgba(255, 215, 0, 0.02);
    border: 0.5px solid var(--color-gold-border);
    padding: 2rem;
}

.access-note-title {
    font-size: 0.58rem;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--color-gold);
    margin-bottom: 1rem;
    opacity: 0.7;
}

.access-note p {
    font-size: 0.78rem;
    color: var(--color-text-body-sub);
    line-height: 2;
    letter-spacing: 0.04em;
}

.access-note-buttons {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
    margin-top: 1.5rem;
}

.access-note-buttons .btn-ghost {
    font-size: 0.72rem;
    padding: 0.55rem 1.2rem;
    margin-top: 0;
    letter-spacing: 0.15em;
}

@media (max-width: 768px) {
    .access-block {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }
}


/* ── CTA ── */
.about-cta {
    padding: 6rem 0;
    text-align: center;
    border-top: 0.5px solid var(--color-gold-border);
}

.about-cta-title {
    font-family: var(--font-display);
    font-size: clamp(1.8rem, 4vw, 2.8rem);
    font-weight: 400;
    color: var(--color-text-body);
    margin-bottom: 0.75rem;
    letter-spacing: 0.05em;
}

.about-cta-sub {
    font-size: 0.75rem;
    color: var(--color-text-faint);
    letter-spacing: 0.2em;
    margin-bottom: 2.5rem;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    padding: 0.8rem 2.2rem;
    background: var(--color-gold);
    color: #000;
    font-size: 0.7rem;
    font-family: var(--font-display);
    letter-spacing: 0.2em;
    text-transform: uppercase;
    text-decoration: none;
    font-weight: 600;
    transition: opacity var(--transition-base), transform var(--transition-base);
}

.btn-primary:hover {
    opacity: 0.85;
    transform: translateY(-1px);
}

.cta-buttons .btn-ghost {
    margin-top: 0;
}

/* ── section-header センタリング用 ── */
.section-header.center {
    text-align: center;
}

.section-header.center .sec-label,
.section-header.center .sec-rule {
    margin-left: auto;
    margin-right: auto;
}

.section-header.center .sec-label::before {
    display: none;
}