/* ========================================
   内页通用样式
   ======================================== */

/* 页面头部 Banner */
.page-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 180px 0 100px;
    position: relative;
    overflow: hidden;
}

.page-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('../images/page-header-bg.jpg') center/cover no-repeat;
    opacity: 0.15;
}

.page-header-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 40px;
    position: relative;
    z-index: 1;
    text-align: center;
}

.page-title {
    font-size: 3rem;
    color: var(--pure-white);
    margin-bottom: 20px;
    font-weight: 700;
}

.page-subtitle {
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.9);
    max-width: 700px;
    margin: 0 auto;
}

/* 面包屑导航 */
.breadcrumb {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    margin-top: 25px;
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.95rem;
}

.breadcrumb a {
    color: var(--light-blue);
    transition: color 0.3s ease;
}

.breadcrumb a:hover {
    color: var(--pure-white);
}

.breadcrumb-separator {
    opacity: 0.6;
}

/* 产品中心样式 */
.product-filter {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 15px;
    margin-bottom: 50px;
}

.filter-btn {
    padding: 10px 25px;
    border: 2px solid var(--accent-blue);
    background: transparent;
    color: var(--accent-blue);
    border-radius: 30px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.95rem;
    font-weight: 500;
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--accent-blue);
    color: var(--pure-white);
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 35px;
}

.product-card {
    background: var(--pure-white);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 5px 25px rgba(0, 0, 0, 0.08);
    transition: all 0.4s ease;
}

.product-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 45px rgba(0, 0, 0, 0.15);
}

.product-img-wrapper {
    position: relative;
    overflow: hidden;
    height: 240px;
}

.product-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.product-card:hover .product-img {
    transform: scale(1.1);
}

.product-badge {
    position: absolute;
    top: 15px;
    right: 15px;
    background: var(--accent-blue);
    color: var(--pure-white);
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

.product-info {
    padding: 25px;
}

.product-category {
    color: var(--accent-blue);
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    margin-bottom: 10px;
}

.product-name {
    font-size: 1.4rem;
    color: var(--dark-gray);
    margin-bottom: 12px;
    font-weight: 700;
}

.product-specs {
    list-style: none;
    margin-bottom: 20px;
}

.product-specs li {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--medium-gray);
    font-size: 0.9rem;
    margin-bottom: 8px;
}

.product-specs li::before {
    content: '✓';
    color: var(--accent-blue);
    font-weight: 700;
}

.product-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 20px;
    border-top: 1px solid var(--light-gray);
}

.product-price {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--deep-blue);
}

.product-link {
    color: var(--accent-blue);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

/* 生产实力页面 */
.production-timeline {
    position: relative;
    max-width: 1000px;
    margin: 0 auto;
}

.timeline-item {
    display: flex;
    gap: 40px;
    margin-bottom: 60px;
    align-items: center;
}

.timeline-item:nth-child(even) {
    flex-direction: row-reverse;
}

.timeline-img {
    flex: 1;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.timeline-img img {
    width: 100%;
    height: 350px;
    object-fit: cover;
    transition: transform 0.5s ease;
}

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

.timeline-content {
    flex: 1;
}

.timeline-number {
    display: inline-block;
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--accent-blue), var(--deep-blue));
    color: var(--pure-white);
    border-radius: 50%;
    text-align: center;
    line-height: 60px;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 20px;
}

.timeline-title {
    font-size: 1.6rem;
    color: var(--dark-gray);
    margin-bottom: 15px;
}

.timeline-desc {
    color: var(--medium-gray);
    line-height: 1.8;
}

/* 工程案例页面 */
.case-studies {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 40px;
}

.case-card {
    position: relative;
    border-radius: 16px;
    overflow: hidden;
    height: 400px;
    cursor: pointer;
}

.case-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.case-card:hover .case-img {
    transform: scale(1.1);
}

.case-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 40px 30px;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.8));
    color: var(--pure-white);
}

.case-industry {
    font-size: 0.9rem;
    color: var(--light-blue);
    margin-bottom: 10px;
}

.case-title {
    font-size: 1.5rem;
    margin-bottom: 10px;
}

.case-location {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    opacity: 0.9;
}

/* 技术支持页面 */
.support-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.support-card {
    background: var(--pure-white);
    padding: 40px;
    border-radius: 16px;
    box-shadow: 0 5px 25px rgba(0, 0, 0, 0.08);
    border-left: 4px solid var(--accent-blue);
}

.support-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--light-blue), var(--accent-blue));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--pure-white);
    margin-bottom: 25px;
}

.support-title {
    font-size: 1.4rem;
    color: var(--dark-gray);
    margin-bottom: 15px;
}

.support-steps {
    list-style: none;
    counter-reset: step-counter;
}

.support-steps li {
    position: relative;
    padding-left: 40px;
    margin-bottom: 15px;
    color: var(--medium-gray);
}

.support-steps li::before {
    counter-increment: step-counter;
    content: counter(step-counter);
    position: absolute;
    left: 0;
    top: 0;
    width: 30px;
    height: 30px;
    background: var(--light-gray);
    border-radius: 50%;
    text-align: center;
    line-height: 30px;
    color: var(--accent-blue);
    font-weight: 700;
    font-size: 0.9rem;
}

/* FAQ 部分 */
.faq-section {
    margin-top: 80px;
}

.faq-list {
    max-width: 900px;
    margin: 0 auto;
}

.faq-item {
    background: var(--pure-white);
    border-radius: 12px;
    margin-bottom: 20px;
    box-shadow: 0 3px 15px rgba(0, 0, 0, 0.06);
    overflow: hidden;
}

.faq-question {
    padding: 25px 30px;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--dark-gray);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background 0.3s ease;
}

.faq-question:hover {
    background: var(--light-gray);
}

.faq-answer {
    padding: 0 30px;
    max-height: 0;
    overflow: hidden;
    transition: all 0.4s ease;
}

.faq-item.active .faq-answer {
    padding: 0 30px 25px;
    max-height: 500px;
}

.faq-answer p {
    color: var(--medium-gray);
    line-height: 1.8;
}

/* 联系我们页面 */
.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-info-box {
    background: linear-gradient(135deg, var(--accent-blue), var(--deep-blue));
    padding: 50px;
    border-radius: 20px;
    color: var(--pure-white);
}

.contact-info-box h3 {
    font-size: 1.8rem;
    margin-bottom: 30px;
}

.contact-detail {
    margin-bottom: 25px;
}

.contact-detail-label {
    font-size: 0.9rem;
    opacity: 0.9;
    margin-bottom: 8px;
}

.contact-detail-value {
    font-size: 1.2rem;
    font-weight: 600;
}

.contact-form-box {
    background: var(--pure-white);
    padding: 50px;
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
}

.form-group {
    margin-bottom: 25px;
}

.form-label {
    display: block;
    margin-bottom: 10px;
    color: var(--dark-gray);
    font-weight: 500;
}

.form-input,
.form-textarea {
    width: 100%;
    padding: 15px 20px;
    border: 2px solid var(--light-gray);
    border-radius: 10px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
    font-family: inherit;
}

.form-input:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--accent-blue);
}

.form-textarea {
    min-height: 150px;
    resize: vertical;
}

/* 新闻资讯列表页 */
.news-list-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 35px;
}

.news-list-item {
    background: var(--pure-white);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 5px 25px rgba(0, 0, 0, 0.08);
    transition: all 0.4s ease;
}

.news-list-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.news-list-img {
    width: 100%;
    height: 220px;
    object-fit: cover;
}

.news-list-content {
    padding: 25px;
}

.news-list-date {
    display: inline-block;
    padding: 5px 15px;
    background: var(--light-gray);
    color: var(--medium-gray);
    border-radius: 20px;
    font-size: 0.85rem;
    margin-bottom: 15px;
}

.news-list-title {
    font-size: 1.3rem;
    color: var(--dark-gray);
    margin-bottom: 12px;
    line-height: 1.4;
}

.news-list-excerpt {
    color: var(--medium-gray);
    line-height: 1.7;
    margin-bottom: 20px;
}

.news-list-more {
    color: var(--accent-blue);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

/* 新闻详情页 */
.article-content {
    max-width: 900px;
    margin: 0 auto;
    background: var(--pure-white);
    padding: 50px;
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
}

.article-header {
    text-align: center;
    margin-bottom: 40px;
    padding-bottom: 30px;
    border-bottom: 2px solid var(--light-gray);
}

.article-meta {
    display: flex;
    justify-content: center;
    gap: 30px;
    color: var(--medium-gray);
    font-size: 0.95rem;
    margin-top: 20px;
}

.article-body {
    font-size: 1.05rem;
    line-height: 1.9;
    color: var(--dark-gray);
}

.article-body p {
    margin-bottom: 25px;
}

.article-body img {
    max-width: 100%;
    border-radius: 12px;
    margin: 30px 0;
}

.related-news {
    margin-top: 60px;
    padding-top: 50px;
    border-top: 2px solid var(--light-gray);
}

/* 关于我们页面 */
.about-intro {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    margin-bottom: 80px;
}

.about-image {
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.12);
}

.about-image img {
    width: 100%;
    height: 450px;
    object-fit: cover;
}

.about-text h3 {
    font-size: 2rem;
    color: var(--dark-gray);
    margin-bottom: 25px;
}

.about-text p {
    color: var(--medium-gray);
    line-height: 1.9;
    margin-bottom: 20px;
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.value-card {
    text-align: center;
    padding: 40px 30px;
    background: var(--light-gray);
    border-radius: 16px;
}

.value-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.value-title {
    font-size: 1.3rem;
    color: var(--dark-gray);
    margin-bottom: 15px;
}

.value-desc {
    color: var(--medium-gray);
    line-height: 1.7;
}

/* ========================================
   响应式适配
   ======================================== */
@media (max-width: 992px) {
    .page-title {
        font-size: 2.2rem;
    }

    .timeline-item,
    .timeline-item:nth-child(even) {
        flex-direction: column;
    }

    .timeline-img,
    .timeline-content {
        flex: 1;
        width: 100%;
    }

    .contact-wrapper {
        grid-template-columns: 1fr;
    }

    .about-intro {
        grid-template-columns: 1fr;
    }

    .case-studies {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .page-header {
        padding: 140px 0 60px;
    }

    .page-title {
        font-size: 1.8rem;
    }

    .article-content {
        padding: 30px 20px;
    }

    .contact-form-box,
    .contact-info-box {
        padding: 30px 20px;
    }
}