/* =========================
   基础样式
========================= */
.product-content {
    box-sizing: border-box;
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    color: #333333;
    font-family: Arial, sans-serif;
    line-height: 1.6;
}

.product-content *,
.product-content *::before,
.product-content *::after {
    box-sizing: border-box;
}

.product-content h1,
.product-content h2,
.product-content h3,
.product-content p {
    font-family: Arial, sans-serif;
}

.product-content h1 {
    margin: 0 0 25px;
    color: #1a365d;
    font-size: 26px;
    font-weight: 700;
    line-height: 1.25;
}

.product-content h2 {
    margin: 35px 0 18px;
    padding-bottom: 8px;
    border-bottom: 2px solid #e2e8f0;
    color: #2d3748;
    font-size: 21px;
    font-weight: 600;
    line-height: 1.35;
}

.product-content h3 {
    margin: 20px 0 10px;
    color: #4a5568;
    font-size: 18px;
    font-weight: 600;
    line-height: 1.4;
}

.product-content p {
    margin: 0 0 16px;
    font-size: 16px;
}

.content-section {
    margin-bottom: 35px;
}

/* =========================
   技术路径与设备类型卡片
========================= */
.pathway-grid,
.form-factor-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin: 20px 0 28px;
}

.pathway-item,
.form-factor-item {
    padding: 20px;
    border-left: 4px solid #3182ce;
    border-radius: 6px;
    background: #f8fafc;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.pathway-item:hover,
.form-factor-item:hover {
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.08);
    transform: translateY(-2px);
}

.pathway-item h3,
.form-factor-item h3 {
    margin-top: 0;
    color: #2d3748;
}

.pathway-item p,
.form-factor-item p {
    margin-bottom: 0;
}

/* =========================
   硬件可靠性与 ROI
========================= */
.hardware-section,
.roi-section {
    margin: 15px 0 25px;
    padding: 22px;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    background: #f8fafc;
}

.hardware-section p:last-child,
.roi-section p:last-child {
    margin-bottom: 0;
}

/* =========================
   相关文章
========================= */
.article-section {
    margin-top: 15px;
    margin-bottom: 35px;
}

.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.article-item {
    padding: 20px;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    background: #f8fafc;
    transition: background 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
}

.article-item:hover {
    background: #edf2f7;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    transform: translateY(-3px);
}

.article-item h3 {
    margin: 0 0 10px;
}

.article-item h3 a {
    color: #2d3748;
    font-size: 18px;
    line-height: 1.4;
    text-decoration: none;
}

.article-item h3 a:hover {
    color: #3182ce;
    text-decoration: underline;
}

.article-item p {
    margin: 0;
    color: #4a5568;
    font-size: 15px;
    line-height: 1.5;
}

/* =========================
   FAQ
========================= */
.faq-section {
    padding: 25px;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    background: #f7fafc;
}

.faq-item {
    margin-bottom: 22px;
    padding-bottom: 20px;
    border-bottom: 1px solid #e2e8f0;
}

.faq-item:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.faq-item h3 {
    margin-top: 0;
    color: #2d3748;
}

.faq-item p {
    margin-bottom: 0;
}

/* =========================
   买家指南链接
========================= */
.guide-section {
    margin-bottom: 30px;
}

.guide-link {
    color: #3598db;
    text-decoration: underline;
}

.guide-link:hover {
    color: #1d6fa5;
}

/* =========================
   询盘按钮
========================= */
.inquiry-section {
    margin: 40px 0 25px;
    padding: 25px;
    border-radius: 10px;
    background: linear-gradient(135deg, #1a365d 0%, #2d3748 100%);
    text-align: center;
}

.inquiry-btn {
    display: inline-block;
    padding: 16px 40px;
    border-radius: 6px;
    background: #e53e3e;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    color: #ffffff;
    font-size: 18px;
    font-weight: 600;
    text-decoration: none;
    transition: background 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
}

.inquiry-btn:hover {
    background: #c53030;
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
    transform: translateY(-2px);
}

/* =========================
   响应式设计
========================= */
@media (max-width: 768px) {
    .product-content {
        padding: 15px;
    }

    .product-content h1 {
        font-size: 22px;
    }

    .product-content h2 {
        font-size: 19px;
    }

    .product-content h3 {
        font-size: 17px;
    }

    .product-content p {
        font-size: 15px;
    }

    .pathway-grid,
    .form-factor-grid,
    .articles-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }

    .pathway-item,
    .form-factor-item,
    .article-item {
        padding: 16px;
    }

    .faq-section {
        padding: 18px;
    }

    .inquiry-btn {
        padding: 14px 30px;
        font-size: 16px;
    }
}

@media print {
    .inquiry-section {
        display: none;
    }
}