/* 产品详情页 */
.product-page {
    padding-top: 0;
}

.product-hero {
    background: var(--bg-soft);
    color: var(--text-color);
    padding: 7rem 0 3.5rem;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.product-hero-content {
    max-width: 720px;
    margin: 0 auto;
}

.product-hero h1 {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 0.85rem;
    color: var(--text-color);
    letter-spacing: 0.04em;
}

.product-hero p {
    font-size: 1rem;
    color: var(--light-text);
    line-height: 1.75;
    margin-bottom: 0;
}

.product-hero-logo {
    width: 88px;
    height: 88px;
    object-fit: contain;
    margin: 0 auto 1.25rem;
    display: block;
    border-radius: 18px;
    border: 1px solid var(--border-color);
}

.product-hero-actions {
    display: flex;
    gap: 0.75rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 1.75rem;
}

.product-section {
    padding: 4rem 0;
}

.product-section.alt {
    background: var(--bg-soft);
}

.product-section .section-title h2 {
    font-size: 1.6rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-color);
    text-align: center;
}

.product-section .section-title p {
    font-size: 0.95rem;
    color: var(--light-text);
    text-align: center;
    max-width: 560px;
    margin: 0 auto;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
    margin-top: 2.5rem;
}

.feature-card {
    background: var(--background);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.feature-card:hover {
    box-shadow: var(--shadow);
}

.feature-icon {
    width: 36px;
    height: 36px;
    background: var(--bg-soft);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--primary-color);
    letter-spacing: 0;
}

.feature-card h3 {
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

.feature-card p {
    color: var(--light-text);
    line-height: 1.65;
    font-size: 0.92rem;
}

.tech-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-top: 2.5rem;
}

.tech-content h3 {
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.tech-list {
    list-style: none;
}

.tech-list li,
.app-feature-item {
    padding: 0.55rem 0 0.55rem 1rem;
    border-left: 2px solid var(--accent-color);
    margin-bottom: 0.4rem;
    color: var(--light-text);
    font-size: 0.92rem;
    line-height: 1.6;
}

.tech-list li::before,
.app-feature-item::before {
    content: none;
}

.tech-highlight {
    background: var(--background);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.75rem;
}

.specs-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
    margin-top: 2.5rem;
}

.spec-card {
    background: var(--background);
    padding: 1.25rem 1rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    text-align: center;
}

.spec-card h4 {
    font-size: 0.92rem;
    font-weight: 600;
    margin-bottom: 0.35rem;
    color: var(--text-color);
}

.spec-card p {
    color: var(--light-text);
    font-size: 0.85rem;
    line-height: 1.5;
}

.cta-section {
    padding: 3.5rem 0;
    background: var(--primary-color);
    color: #fff;
    text-align: center;
}

.cta-section h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.cta-section p {
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
    opacity: 0.9;
}

.cta-actions {
    display: flex;
    gap: 0.75rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn-white {
    background: #fff;
    color: var(--primary-color);
    padding: 0.65rem 1.4rem;
    border-radius: var(--radius);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.92rem;
    transition: var(--transition);
    display: inline-block;
}

.btn-white:hover {
    background: var(--bg-soft);
}

.btn-outline-white {
    background: transparent;
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.65);
    padding: 0.6rem 1.4rem;
    border-radius: var(--radius);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.92rem;
    transition: var(--transition);
    display: inline-block;
}

.btn-outline-white:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: #fff;
}

.back-to-home {
    position: fixed;
    top: 72px;
    left: 16px;
    background: var(--background);
    color: var(--text-color);
    padding: 0.5rem 0.85rem;
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.85rem;
    transition: var(--transition);
    z-index: 100;
}

.back-to-home:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

@media (max-width: 768px) {
    .product-hero {
        padding: 5rem 0 2.5rem;
    }

    .product-hero h1 {
        font-size: 1.45rem;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .tech-grid {
        grid-template-columns: 1fr;
    }

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

    .back-to-home {
        display: none;
    }
}

@media (max-width: 480px) {
    .specs-grid {
        grid-template-columns: 1fr;
    }
}