/* 主題 Hub 頁 · 卡片導覽 */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.hub-breadcrumb {
    max-width: min(720px, 100%);
    margin: 0 auto;
    padding: 14px 16px 0;
    font-size: clamp(14px, 3.2vw, 16px);
    line-height: 1.5;
    color: var(--sound-brown-soft, #6B5B52);
}

.hub-breadcrumb a {
    color: var(--sound-teal, #3A8585);
    text-decoration: none;
    font-weight: 600;
}

.hub-breadcrumb a:hover {
    color: var(--sound-coral, #C46840);
}

.hub-breadcrumb__sep {
    margin: 0 0.35em;
    color: rgba(92, 61, 46, 0.35);
}

.hub-breadcrumb__current {
    color: var(--sound-brown, #5C3D2E);
    font-weight: 600;
}

.hub-hero {
    padding-top: 8px;
}

.hub-cards-section {
    padding-top: 0;
}

.ahk-hub-cards {
    display: grid;
    gap: 14px;
    max-width: min(680px, 100%);
    margin: 0 auto;
}

.ahk-hub-card {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    padding: 18px 20px;
    border: 1px solid var(--sound-border, rgba(212, 160, 86, 0.28));
    border-radius: 12px;
    background: var(--sound-canvas, #FBF7F1);
    text-decoration: none;
    color: var(--sound-brown, #5C3D2E);
    min-height: 72px;
    transition: background 0.2s ease, border-color 0.2s ease, transform 0.15s ease;
}

.ahk-hub-card:hover {
    background: rgba(212, 160, 86, 0.1);
    border-color: var(--sound-gold-warm, #D4A056);
    transform: translateY(-1px);
}

.ahk-hub-card__icon {
    flex-shrink: 0;
    font-size: 1.5rem;
    line-height: 1.3;
}

.ahk-hub-card__body {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.ahk-hub-card__title {
    font-size: clamp(17px, 4vw, 20px);
    font-weight: 700;
    line-height: 1.35;
    color: var(--sound-brown, #5C3D2E);
}

.ahk-hub-card:hover .ahk-hub-card__title {
    color: var(--sound-coral, #C46840);
}

.ahk-hub-card__desc {
    font-size: clamp(14px, 3.3vw, 16px);
    line-height: 1.55;
    color: var(--sound-brown-soft, #6B5B52);
    font-weight: 400;
}

.ahk-hub-card__arrow {
    flex-shrink: 0;
    align-self: center;
    color: var(--sound-coral, #C46840);
    font-size: 22px;
    font-weight: 700;
}

@media (max-width: 480px) {
    .ahk-hub-card {
        padding: 16px;
        gap: 12px;
    }
}

@media (max-width: 768px) {
    .hub-breadcrumb {
        padding: 12px max(16px, env(safe-area-inset-right, 0px)) 0 max(16px, env(safe-area-inset-left, 0px));
        overflow-wrap: anywhere;
    }

    .spoke-related__links {
        flex-direction: column;
        align-items: stretch;
    }

    .spoke-related__link {
        justify-content: center;
        text-align: center;
        overflow-wrap: anywhere;
    }
}

.ahk-hub-cards--home {
    margin-bottom: 1.25rem;
}

/* 子頁相關連結（強化內部連結） */
.spoke-related {
    padding-top: 0;
}

.spoke-related__heading {
    font-size: clamp(18px, 4.2vw, 22px);
    margin-bottom: 1rem;
}

.spoke-related__links {
    display: flex;
    flex-wrap: wrap;
    gap: 10px 14px;
}

.spoke-related__link {
    display: inline-flex;
    align-items: center;
    padding: 10px 16px;
    border-radius: 999px;
    background: #fff;
    border: 1px solid rgba(92, 61, 46, 0.15);
    color: var(--sound-brown, #5C3D2E);
    font-size: clamp(14px, 3.3vw, 16px);
    font-weight: 600;
    text-decoration: none;
    line-height: 1.4;
    transition: border-color 0.2s, color 0.2s, background 0.2s;
}

.spoke-related__link:hover {
    border-color: var(--sound-coral, #C46840);
    color: var(--sound-coral, #C46840);
    background: rgba(196, 104, 64, 0.06);
}

/* 試戴 + 購買雙 CTA */
.trial-purchase-cta {
    margin-top: 1.25rem;
    padding-top: 1.25rem;
    border-top: 1px solid rgba(92, 61, 46, 0.1);
    text-align: center;
}

.trial-purchase-cta__heading {
    margin: 0 0 0.5rem;
    font-size: clamp(18px, 4.2vw, 22px);
    font-weight: 700;
    color: var(--sound-brown, #5C3D2E);
}

.trial-purchase-cta__lead {
    margin: 0 0 1rem;
    font-size: clamp(15px, 3.5vw, 17px);
    line-height: 1.65;
    color: var(--sound-brown-soft, #6B5B52);
}

.trial-purchase-cta__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
    align-items: stretch;
}

.trial-purchase-cta__btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 12px 20px;
    border-radius: 999px;
    font-size: clamp(15px, 3.5vw, 17px);
    font-weight: 700;
    text-decoration: none;
    line-height: 1.35;
    text-align: center;
    box-sizing: border-box;
}

.trial-purchase-cta__btn.sound-cta {
    max-width: none;
    flex: 1 1 200px;
    min-width: min(200px, 100%);
    border-radius: 999px;
    letter-spacing: 0;
}

.trial-purchase-cta__btn--secondary {
    background: #fff;
    border: 2px solid var(--sound-coral, #C46840);
    color: var(--sound-coral, #C46840);
}

.trial-purchase-cta__btn--secondary:hover {
    background: rgba(196, 104, 64, 0.06);
}

.home-value__lead {
    text-align: center;
    margin-bottom: 1rem;
}

.home-value__grid {
    max-width: min(720px, 100%);
    margin-bottom: 0.5rem;
}

@media (max-width: 480px) {
    .trial-purchase-cta__actions {
        flex-direction: column;
    }

    .trial-purchase-cta__btn {
        width: 100%;
    }
}