:root {
    --page-bg: #0a1118;
    --hero-bg: radial-gradient(circle at 16% 10%, #1a3150 0%, #0a1118 58%);
    --text-main: #f4f7fb;
    --text-soft: #b7c0cc;
    --panel: rgba(255, 255, 255, 0.05);
    --panel-border: rgba(255, 255, 255, 0.1);
    --accent-soft: #8bc5ff;
}

body {
    margin: 0;
    padding-top: 96px;
    background: var(--page-bg);
    color: var(--text-main);
}

main {
    display: block;
}

.product-hero {
    padding: 3.5rem 0 4rem;
    background: var(--hero-bg);
}

.breadcrumbs {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 2rem;
    font-size: 0.84rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-soft);
}

.breadcrumbs a {
    color: var(--accent-soft);
    font-weight: 700;
}

.hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    gap: 2.5rem;
    align-items: center;
}

.product-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    padding: 0.45rem 0.9rem;
    border-radius: 999px;
    background: rgba(0, 123, 255, 0.16);
    color: var(--accent-soft);
    font-size: 0.74rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    font-weight: 800;
    margin-bottom: 1.25rem;
}

.product-title {
    font-size: clamp(2.1rem, 4vw, 3.45rem);
    line-height: 1.05;
    margin: 0;
}

.product-subtitle {
    margin-top: 1.2rem;
    font-size: 1.04rem;
    line-height: 1.8;
    color: var(--text-soft);
    max-width: 760px;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
    margin-top: 1.75rem;
}

.hero-note {
    display: flex;
    align-items: flex-start;
    gap: 0.7rem;
    margin-top: 1.4rem;
    padding: 1rem 1.15rem;
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.08);
    color: var(--text-soft);
}

.hero-note i {
    margin-top: 0.2rem;
    color: #74c2ff;
}

.quick-points {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.9rem;
    margin-top: 1.8rem;
}

.quick-point {
    padding: 1rem;
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.quick-point strong {
    display: block;
    font-size: 1.15rem;
    margin-bottom: 0.2rem;
}

.quick-point span {
    color: var(--text-soft);
    font-size: 0.9rem;
}

.product-image-container {
    position: relative;
    padding: 2.5rem;
    border-radius: 30px;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.08) 0%, rgba(255, 255, 255, 0.03) 100%);
    border: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: 0 30px 70px rgba(0, 0, 0, 0.28);
    display: flex;
    align-items: center;
    justify-content: center;
    aspect-ratio: 4 / 3;
    overflow: hidden;
}

.product-image-container img {
    width: 100%;
    height: 100%;
    border-radius: 16px;
    object-fit: contain;
    transition: transform 0.5s cubic-bezier(0.165, 0.84, 0.44, 1);
}

.product-image-container:hover img {
    transform: scale(1.06);
}

.specs-section {
    padding: 4rem 0 5rem;
}

.specs-layout {
    display: grid;
    grid-template-columns: minmax(290px, 360px) minmax(0, 1fr);
    gap: 2rem;
    align-items: start;
}

.quick-specs {
    display: grid;
    gap: 1rem;
}

.spec-item {
    display: flex;
    gap: 1rem;
    align-items: center;
    padding: 1rem 1.1rem;
    border-radius: 20px;
    background: var(--panel);
    border: 1px solid var(--panel-border);
}

.spec-icon {
    width: 52px;
    height: 52px;
    border-radius: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 123, 255, 0.14);
    color: var(--accent-soft);
    font-size: 1.05rem;
    flex-shrink: 0;
}

.spec-text h3 {
    margin: 0 0 0.3rem;
    font-size: 0.95rem;
}

.spec-text p {
    margin: 0;
    color: var(--text-soft);
}

.detailed-specs {
    padding: 2rem;
    border-radius: 30px;
    background: var(--panel);
    border: 1px solid var(--panel-border);
}

.detailed-specs h2 {
    margin-top: 0;
    font-size: clamp(1.7rem, 3vw, 2.35rem);
}

.detailed-specs > p {
    color: var(--text-soft);
    line-height: 1.8;
}

.feature-list {
    display: grid;
    gap: 0.95rem;
    margin: 1.5rem 0 0;
    padding-left: 1.25rem;
}

.feature-list li {
    color: var(--text-soft);
    line-height: 1.75;
}

.info-box,
.cta-panel {
    margin-top: 1.75rem;
    padding: 1.4rem;
    border-radius: 24px;
    border: 1px solid var(--panel-border);
    background: rgba(255, 255, 255, 0.04);
}

.info-box h3,
.cta-panel h3 {
    margin: 0 0 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.55rem;
}

.info-box p,
.cta-panel p {
    margin: 0;
    color: var(--text-soft);
    line-height: 1.8;
}

.cta-panel .cta-button {
    margin-top: 1rem;
}

.faq-section {
    margin-top: 2.2rem;
}

.faq-section h2 {
    margin-bottom: 1rem;
}

.faq-grid {
    display: grid;
    gap: 0.9rem;
}

.faq-grid details {
    border-radius: 20px;
    border: 1px solid var(--panel-border);
    background: rgba(255, 255, 255, 0.04);
    padding: 1rem 1.1rem;
}

.faq-grid summary {
    cursor: pointer;
    font-weight: 700;
}

.faq-grid p {
    margin: 0.85rem 0 0;
    color: var(--text-soft);
    line-height: 1.75;
}

.mobile-buy-strip {
    position: sticky;
    bottom: 0;
    z-index: 50;
    display: none;
    padding: 0.9rem 1rem calc(0.9rem + env(safe-area-inset-bottom));
    background: rgba(10, 17, 24, 0.92);
    backdrop-filter: blur(14px);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.mobile-buy-strip .cta-button {
    width: 100%;
}

@media (max-width: 991px) {
    body {
        padding-top: 84px;
    }

    .product-hero {
        padding: 2.4rem 0 3rem;
    }

    .hero-grid,
    .specs-layout {
        grid-template-columns: 1fr;
    }

    .product-image-container {
        order: -1;
    }

    .quick-points {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .detailed-specs {
        padding: 1.4rem;
        border-radius: 24px;
    }

    .mobile-buy-strip {
        display: block;
    }
}

@media (max-width: 640px) {
    .breadcrumbs {
        font-size: 0.76rem;
        margin-bottom: 1.4rem;
    }

    .hero-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .quick-points {
        grid-template-columns: 1fr;
    }

    .product-image-container {
        padding: 1rem;
        border-radius: 22px;
    }

    .spec-item {
        padding: 0.95rem 1rem;
    }
}