/* 产品中心页面样式 */
.product-page {
    min-height: 100vh;
}

/* 顶部标题区域 */
.product-header {
    background: #f5f5f5;
    background-size: cover;
    background-position: center center;
    background-repeat: no-repeat;
    padding: 120px 0;
    text-align: center;
    position: relative;
}

.product-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.4);
    z-index: 1;
}

.product-header .container {
    position: relative;
    z-index: 2;
}

.header-content {
    max-width: 800px;
    margin: 0 auto;
}

.page-title {
    font-size: 48px;
    font-weight: 700;
    color: #fff;
    margin: 0 0 10px 0;
    line-height: 1.2;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.page-subtitle {
    font-size: 18px;
    color: #2563eb;
    margin: 0 0 30px 0;
    font-weight: 500;
    letter-spacing: 2px;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
}

.page-description {
    font-size: 16px;
    color: #f0f0f0;
    line-height: 1.8;
    margin: 0;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
}

/* 产品类型展示区域 */
.product-types {
    padding: 80px 0;
    background: white;
}

.product-types .section-header {
    text-align: center;
    margin-bottom: 60px;
}

.product-types .section-title {
    font-size: 36px;
    font-weight: 700;
    color: #333;
    margin: 0 0 10px 0;
}

.product-types .section-subtitle {
    font-size: 16px;
    color: #2563eb;
    margin: 0;
    font-weight: 500;
    letter-spacing: 1px;
}

/* 产品网格 */
.product-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 25px;
    max-width: 1200px;
    margin: 0 auto;
}

/* 产品卡片 */
.product-card {
    background: white;
    border: 1px solid #E0E0E0;
    border-radius: 12px;
    padding: 20px 25px;
    text-align: left;
    transition: all 0.3s ease;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 20px;
    min-height: 100px;
}

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 35px rgba(0, 0, 0, 0.15);
    border-color: #3b82f6;
}

.product-card:active {
    transform: translateY(-4px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.12);
}

/* 产品图标 */
.product-icon {
    width: 50px;
    height: 50px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #2563eb;
    transition: all 0.3s ease;
    background: #f8f9fa;
    border-radius: 50%;
}

.product-card:hover .product-icon {
    color: #2563eb;
    background: #f9f9f9;
    transform: scale(1.05);
}

.product-icon svg {
    width: 28px;
    height: 28px;
    stroke: currentColor;
    stroke-width: 1.5;
    fill: none;
}

.product-icon svg[fill="currentColor"] {
    fill: currentColor;
    stroke: none;
}

/* 产品内容区域 */
.product-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

/* 产品标题 */
.product-title {
    font-size: 18px;
    font-weight: 600;
    color: #333;
    margin: 0 0 8px 0;
    line-height: 1.3;
}

/* 产品描述 */
.product-description {
    font-size: 14px;
    color: #666;
    line-height: 1.5;
    margin: 0;
}

/* 仪器中心展示区域 */
.instrument-center {
    padding: 80px 0;
    background: #f8f9fa;
}

.instrument-center .section-header {
    text-align: center;
    margin-bottom: 60px;
}

.instrument-center .section-title {
    font-size: 36px;
    font-weight: 700;
    color: #333;
    margin: 0 0 10px 0;
}

.instrument-center .section-subtitle {
    font-size: 16px;
    color: #2563eb;
    margin: 0;
    font-weight: 500;
    letter-spacing: 1px;
}

.instrument-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
    max-width: 1000px;
    margin: 0 auto;
}

.instrument-card {
    background: white;
    border: 1px solid #E0E0E0;
    border-radius: 12px;
    padding: 20px 25px;
    text-align: left;
    transition: all 0.3s ease;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 20px;
    min-height: 100px;
}

.instrument-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 35px rgba(0, 0, 0, 0.15);
    border-color: #3b82f6;
}

.instrument-icon {
    width: 50px;
    height: 50px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #2563eb;
    transition: all 0.3s ease;
    background: #f8f9fa;
    border-radius: 50%;
}

.instrument-card:hover .instrument-icon {
    color: #2563eb;
    background: #f0f0f0;
    transform: scale(1.05);
}

.instrument-icon svg {
    width: 28px;
    height: 28px;
    stroke: currentColor;
    stroke-width: 1.5;
    fill: none;
}

.instrument-icon svg[fill="currentColor"] {
    fill: currentColor;
    stroke: none;
}

/* 仪器内容区域 */
.instrument-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.instrument-title {
    font-size: 18px;
    font-weight: 600;
    color: #333;
    margin: 0 0 8px 0;
    line-height: 1.3;
}

.instrument-description {
    font-size: 14px;
    color: #666;
    line-height: 1.5;
    margin: 0;
}

/* 服务平台区域 */
.service-platform {
    padding: 80px 0;
    background: white;
}

.service-platform .section-header {
    text-align: center;
    margin-bottom: 60px;
}

.service-platform .section-title {
    font-size: 36px;
    font-weight: 700;
    color: #333;
    margin-bottom: 10px;
}

.service-platform .section-subtitle {
    font-size: 18px;
    color: #2563eb;
    font-weight: 300;
}

.service-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
}

.service-card {
    background: #f8f9fa;
    border: none;
    border-radius: 8px;
    padding: 30px 25px;
    text-align: left;
    transition: all 0.3s ease;
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    display: flex;
    flex-direction: column;
    height: 100%;
    min-height: 280px;
}

.service-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.12);
}

.service-title {
    font-size: 20px;
    font-weight: 600;
    color: #333;
    margin-bottom: 12px;
    line-height: 1.3;
}

.service-separator {
    width: 100%;
    height: 1px;
    background: #333;
    margin-bottom: 20px;
}

.service-description {
    font-size: 14px;
    color: #666;
    line-height: 1.6;
    margin-bottom: 25px;
    flex: 1;
}

.view-more-link {
    color: #333;
    text-decoration: none;
    font-size: 14px;
    font-weight: 600;
    align-self: flex-start;
    transition: color 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.view-more-link:hover {
    color: #2563eb;
    text-decoration: underline;
}

/* 特色推荐区域 */
.special-recommendation {
    padding: 80px 0;
    background: white;
}

.special-recommendation .section-header {
    text-align: center;
    margin-bottom: 60px;
}

.special-recommendation .section-title {
    font-size: 36px;
    font-weight: 700;
    color: #333;
    margin-bottom: 10px;
}

.special-recommendation .section-subtitle {
    font-size: 18px;
    color: #2563eb;
    font-weight: 300;
}

.recommendation-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
}

.recommendation-card {
    background: white;
    border: 1px solid #E0E0E0;
    border-radius: 12px;
    overflow: hidden;
    transition: all 0.3s ease;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
}

.recommendation-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 35px rgba(0, 0, 0, 0.15);
    border-color: #3b82f6;
}

.recommendation-image {
    width: 100%;
    height: 200px;
    overflow: hidden;
}

.recommendation-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.recommendation-card:hover .recommendation-img {
    transform: scale(1.05);
}

.recommendation-content {
    padding: 25px;
    text-align: left;
}

.recommendation-title {
    font-size: 18px;
    font-weight: 600;
    color: #333;
    margin: 0 0 20px 0;
    line-height: 1.4;
}

.view-more-btn {
    display: inline-block;
    color: #2563eb;
    text-decoration: none;
    font-size: 14px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: color 0.3s ease;
}

.view-more-btn:hover {
    color: #2563eb;
    text-decoration: underline;
}

/* 研究领域区域 */
.research-areas {
    padding: 80px 0;
    background: #f8f9fa;
}

.research-areas .section-header {
    text-align: center;
    margin-bottom: 60px;
}

.research-areas .section-title {
    font-size: 36px;
    font-weight: 700;
    color: #333;
    margin-bottom: 10px;
}

.research-areas .section-subtitle {
    font-size: 18px;
    color: #2563eb;
    font-weight: 300;
}

.research-grid {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 40px;
    max-width: 1200px;
    margin: 0 auto;
}

/* 大卡片样式 */
.research-card-large {
    background: white;
    border: 1px solid #E0E0E0;
    border-radius: 15px;
    padding: 40px 30px;
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 300px;
}

.research-card-large:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
    border-color: #3b82f6;
}

.research-icon-large {
    width: 100px;
    height: 100px;
    margin-bottom: 25px;
    background: linear-gradient(135deg, #3b82f6, #1e3a8a);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    transition: all 0.3s ease;
}

.research-card-large:hover .research-icon-large {
    transform: scale(1.1);
    background: linear-gradient(135deg, #60a5fa, #1e40af);
}

.research-icon-large svg {
    width: 50px;
    height: 50px;
    fill: currentColor;
}

.research-title-large {
    font-size: 24px;
    font-weight: 700;
    color: #333;
    margin: 0 0 10px 0;
    line-height: 1.3;
}

.research-subtitle-large {
    font-size: 16px;
    color: #2563eb;
    margin: 0;
    font-weight: 500;
}

/* 小卡片容器网格布局 */
.research-small-cards-container {
    display: grid;
    grid-template-columns: repeat(4, 1fr); /* 4列 */
    grid-template-rows: repeat(2, 1fr); /* 2行 */
    gap: 20px; /* 卡片间距 */
}

/* 小卡片样式 */
.research-card-small {
    background: white;
    border: 1px solid #E0E0E0;
    border-radius: 12px;
    padding: 20px 15px;
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 120px;
}

.research-card-small:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    border-color: #3b82f6;
}

.research-icon-small {
    width: 50px;
    height: 50px;
    margin-bottom: 15px;
    background: #f8f9fa;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #2563eb;
    transition: all 0.3s ease;
}

.research-card-small:hover .research-icon-small {
    background: #3b82f6;
    color: white;
    transform: scale(1.1);
}

.research-icon-small svg {
    width: 25px;
    height: 25px;
    fill: currentColor;
}

.research-title-small {
    font-size: 14px;
    font-weight: 600;
    color: #333;
    margin: 0 0 5px 0;
    line-height: 1.3;
}

.research-subtitle-small {
    font-size: 12px;
    color: #2563eb;
    margin: 0;
    font-weight: 400;
}

/* 产品页面响应式设计 */
@media (max-width: 1024px) {
    .product-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 25px;
    }

    .instrument-grid {
        gap: 30px;
    }

    .research-grid {
        gap: 30px;
    }

    .research-card-large {
        padding: 30px 25px;
        min-height: 250px;
    }

    .research-icon-large {
        width: 80px;
        height: 80px;
        margin-bottom: 20px;
    }

    .research-icon-large svg {
        width: 40px;
        height: 40px;
    }

    .research-title-large {
        font-size: 20px;
    }

    .research-subtitle-large {
        font-size: 14px;
    }

    .research-card-small {
        padding: 15px 12px;
        min-height: 100px;
    }

    .research-icon-small {
        width: 40px;
        height: 40px;
        margin-bottom: 12px;
    }

    .research-icon-small svg {
        width: 20px;
        height: 20px;
    }

    .research-title-small {
        font-size: 13px;
    }

    .research-subtitle-small {
        font-size: 11px;
    }
}

@media (max-width: 768px) {
    .product-header {
        padding: 80px 0;
    }

    .product-header::before {
        background: rgba(0, 0, 0, 0.5);
    }

    .page-title {
        font-size: 36px;
    }

    .page-subtitle {
        font-size: 16px;
        margin-bottom: 20px;
    }

    .page-description {
        font-size: 15px;
        line-height: 1.6;
    }

    .product-types {
        padding: 60px 0;
    }

    .product-types .section-title {
        font-size: 28px;
    }

    .product-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
    }

    .product-card {
        padding: 15px 20px;
        gap: 15px;
        min-height: 90px;
    }

    .product-icon {
        width: 45px;
        height: 45px;
    }

    .product-icon svg {
        width: 25px;
        height: 25px;
    }

    .product-title {
        font-size: 16px;
        margin-bottom: 6px;
    }

    .product-description {
        font-size: 13px;
    }

    .instrument-center {
        padding: 60px 0;
    }

    .instrument-center .section-title {
        font-size: 28px;
    }

    .instrument-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }

    .instrument-card {
        padding: 15px 20px;
        gap: 15px;
        min-height: 90px;
    }

    .instrument-icon {
        width: 45px;
        height: 45px;
    }

    .instrument-icon svg {
        width: 25px;
        height: 25px;
    }

    .instrument-title {
        font-size: 16px;
        margin-bottom: 6px;
    }

    .instrument-description {
        font-size: 13px;
    }

    .service-platform {
        padding: 60px 0;
    }

    .service-platform .section-title {
        font-size: 30px;
    }

    .service-platform .section-subtitle {
        font-size: 16px;
    }

    .service-grid {
        gap: 25px;
    }

    .service-content {
        padding: 20px;
    }

    .service-title {
        font-size: 16px;
    }

    .special-recommendation {
        padding: 60px 0;
    }

    .special-recommendation .section-title {
        font-size: 30px;
    }

    .special-recommendation .section-subtitle {
        font-size: 16px;
    }

    .recommendation-grid {
        gap: 25px;
    }

    .recommendation-content {
        padding: 20px;
    }

    .recommendation-title {
        font-size: 16px;
    }

    .research-areas {
        padding: 40px 0;
    }

    .research-areas .section-title {
        font-size: 26px;
    }

    .research-areas .section-subtitle {
        font-size: 14px;
    }

    .research-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .research-card-large {
        grid-column: 1;
        grid-row: 1;
        padding: 25px 20px;
        min-height: 200px;
    }

    .research-small-cards-container {
        grid-template-columns: repeat(2, 1fr); /* 移动端2列 */
        gap: 15px;
    }

    .research-card-small {
        padding: 15px 10px;
        min-height: 90px;
    }

    .research-icon-large {
        width: 70px;
        height: 70px;
        margin-bottom: 15px;
    }

    .research-icon-large svg {
        width: 35px;
        height: 35px;
    }

    .research-title-large {
        font-size: 18px;
    }

    .research-subtitle-large {
        font-size: 13px;
    }

    .research-icon-small {
        width: 35px;
        height: 35px;
        margin-bottom: 10px;
    }

    .research-icon-small svg {
        width: 18px;
        height: 18px;
    }

    .research-title-small {
        font-size: 12px;
    }

    .research-subtitle-small {
        font-size: 10px;
    }
}

@media (max-width: 480px) {
    .product-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }

    .product-card {
        padding: 20px 15px;
        gap: 15px;
    }
}