/* Reset */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    height: 100%;
    margin: 0;
    padding: 0;
}
.mb-32{
    margin: 2rem auto !important;
}
:root {
    --primary-blue: #2b6cb0;
    --dark-blue: #1a4d7a;
    --light-blue: #4a90d9;
    --white: #ffffff;
    --text-dark: #333;
    --text-gray: #666;
    --bg-light: #f5f7fa;
    --bg-dark: #2c3e50;
}

body {
    font-family: 'Microsoft YaHei', 'Segoe UI', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: var(--white);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    z-index: 1000;
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 40px;
}

.logo img {
    height: 60px;
    padding: 10px 0;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 0;
    margin: 0;
}

.nav-menu li {
    position: relative;
}

.nav-menu a {
    display: block;
    padding: 25px 20px;
    color: var(--text-dark);
    text-decoration: none;
    font-size: 15px;
    transition: all 0.3s;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--primary-blue);
    background: var(--bg-light);
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--text-dark);
    transition: 0.3s;
}

/* Hero Slider */
.hero-slider {
    margin: 0;
    padding: 0;
    position: relative;
    width: 100vw;
    height: 100vh;
    overflow: hidden;
    left: 0;
    right: 0;
}

.slider-container {
    position: relative;
    width: 100%;
    height: 100%;
}

.slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 0.6s ease-in-out;
}

.slide.active {
    opacity: 1;
}

.slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Slide Content Overlay */
.slide-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    color: white;
    z-index: 2;
}

.slide-content h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.7);
}

.slide-content p {
    font-size: 1.3rem;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.7);
}

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

.slider-controls {
    position: absolute;
    top: 50%;
    width: 100%;
    display: flex;
    justify-content: space-between;
    padding: 0 20px;
    transform: translateY(-50%);
    z-index: 10;
}

.prev-btn,
.next-btn {
    background: rgba(255,255,255,0.3);
    border: none;
    color: var(--white);
    font-size: 24px;
    width: 50px;
    height: 50px;
    cursor: pointer;
    transition: 0.3s;
    border-radius: 50%;
}

.prev-btn:hover,
.next-btn:hover {
    background: rgba(255,255,255,0.6);
}

.slider-dots {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 10;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255,255,255,0.5);
    cursor: pointer;
    transition: 0.3s;
}

.dot.active {
    background: var(--white);
    width: 30px;
    border-radius: 6px;
}

/* Info Bar with Tabs */
.info-bar {
    background: var(--primary-blue);
    padding: 0;
}

.info-bar-wrapper {
    display: flex;
    flex-direction: column;
}

.info-tabs {
    display: flex;
    background: rgba(0,0,0,0.1);
    border-bottom: 2px solid rgba(255,255,255,0.2);
}

.info-tab-btn {
    flex: 1;
    padding: 15px 20px;
    background: transparent;
    border: none;
    color: rgba(255,255,255,0.8);
    font-size: 15px;
    cursor: pointer;
    transition: 0.3s;
    border-right: 1px solid rgba(255,255,255,0.1);
    position: relative;
}

.info-tab-btn:last-child {
    border-right: none;
}

.info-tab-btn:hover {
    background: rgba(255,255,255,0.1);
    color: var(--white);
}

.info-tab-btn.active {
    background: var(--primary-blue);
    color: var(--white);
    font-weight: 600;
}

.info-tab-btn.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--white);
}

.info-content {
    padding: 30px 0;
}

.info-tab-content {
    display: none;
}

.info-tab-content.active {
    display: block;
}

/* News List in Info Bar */
.news-list-simple {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.news-item-simple {
    display: flex;
    align-items: center;
    padding: 12px 0;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    gap: 20px;
}

.news-item-simple:last-child {
    border-bottom: none;
}

.news-item-simple .date {
    color: rgba(255,255,255,0.7);
    font-size: 14px;
    min-width: 50px;
    font-weight: 600;
}

.news-item-simple a {
    color: rgba(255,255,255,0.95);
    text-decoration: none;
    font-size: 15px;
    transition: 0.3s;
    flex: 1;
}

.news-item-simple a:hover {
    color: var(--white);
    padding-left: 5px;
}

/* News Section */
.news-section {
    padding: 60px 0;
    background: var(--bg-light);
}

.section-title {
    font-size: 32px;
    color: var(--text-dark);
    text-align: center;
    margin-bottom: 40px;
    font-weight: 600;
}

.news-tabs {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 30px;
}

.tab-btn {
    padding: 10px 25px;
    background: var(--white);
    border: 1px solid #ddd;
    cursor: pointer;
    font-size: 15px;
    transition: 0.3s;
    border-radius: 4px;
}

.tab-btn:hover,
.tab-btn.active {
    background: var(--primary-blue);
    color: var(--white);
    border-color: var(--primary-blue);
}

.news-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 30px;
}

.news-featured {
    background: var(--white);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.news-featured img {
    width: 100%;
    height: 250px;
    object-fit: cover;
}

.news-featured-info {
    padding: 20px;
}

.news-featured-info h3 {
    font-size: 18px;
    margin-bottom: 10px;
    color: var(--text-dark);
}

.news-date {
    color: var(--text-gray);
    font-size: 14px;
}

.news-list {
    background: var(--white);
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.news-item {
    display: flex;
    padding: 15px 0;
    border-bottom: 1px solid #eee;
    align-items: center;
    gap: 20px;
}

.news-item:last-child {
    border-bottom: none;
}

.news-item .date {
    color: var(--text-gray);
    font-size: 14px;
    min-width: 50px;
    font-weight: 600;
}

.news-item a {
    color: var(--text-dark);
    text-decoration: none;
    transition: 0.3s;
    flex: 1;
}

.news-item a:hover {
    color: var(--primary-blue);
}

/* Stats Section */
.stats-section {
    padding: 60px 0;
    background: var(--white);
}

.stats-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.stats-text h3 {
    font-size: 28px;
    margin-bottom: 20px;
    color: var(--text-dark);
}

.stats-text p {
    color: var(--text-gray);
    line-height: 1.8;
    font-size: 15px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.stat-box {
    text-align: center;
    padding: 20px;
    background: var(--bg-light);
    border-radius: 8px;
}

.stat-number {
    font-size: 48px;
    font-weight: bold;
    color: var(--primary-blue);
    margin-bottom: 10px;
}

.stat-label {
    font-size: 16px;
    color: var(--text-gray);
}

/* Dark Section */
.dark-section {
    position: relative;
    padding: 100px 0;
    background-size: cover;
    background-position: center;
    color: var(--white);
}

.dark-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.6);
}

.dark-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.dark-content h2 {
    font-size: 36px;
    margin-bottom: 20px;
    font-weight: 600;
}

.dark-content p {
    font-size: 16px;
    line-height: 1.8;
    margin-bottom: 30px;
    opacity: 0.9;
}

.dark-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
}

.btn-dark {
    padding: 12px 30px;
    background: rgba(255,255,255,0.2);
    color: var(--white);
    text-decoration: none;
    border-radius: 4px;
    transition: 0.3s;
    border: 1px solid rgba(255,255,255,0.3);
}

.btn-dark:hover {
    background: rgba(255,255,255,0.3);
    border-color: var(--white);
}

/* Culture Gallery */
.culture-gallery {
    padding: 60px 0;
    background: var(--white);
}

.section-subtitle {
    text-align: center;
    color: var(--text-gray);
    margin-bottom: 40px;
    font-size: 16px;
}

/* Certificate Slider Styles */
.certificate-slider {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
    background: var(--white);
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

.certificate-container {
    position: relative;
    width: 100%;
    height: 500px;
}

.certificate-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 0.6s ease-in-out;
    display: flex;
    align-items: center;
    justify-content: center;
}

.certificate-slide.active {
    opacity: 1;
}

.certificate-slide img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    object-position: center;
    background: #f8f9fa;
    padding: 30px;
}

.certificate-controls {
    position: absolute;
    top: 50%;
    width: 100%;
    display: flex;
    justify-content: space-between;
    padding: 0 20px;
    transform: translateY(-50%);
    z-index: 10;
}

.cert-prev-btn,
.cert-next-btn {
    background: rgba(43, 108, 176, 0.8);
    border: none;
    color: var(--white);
    font-size: 24px;
    width: 50px;
    height: 50px;
    cursor: pointer;
    transition: 0.3s;
    border-radius: 50%;
}

.cert-prev-btn:hover,
.cert-next-btn:hover {
    background: var(--primary-blue);
    transform: scale(1.1);
}

.certificate-dots {
    position: relative;
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 30px;
    z-index: 10;
}

.cert-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(43, 108, 176, 0.3);
    cursor: pointer;
    transition: 0.3s;
}

.cert-dot.active {
    background: var(--primary-blue);
    width: 30px;
    border-radius: 6px;
}

/* Team Section */
.team-section {
    padding: 60px 0;
    background: var(--bg-light);
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    margin-top: 40px;
}

.team-member {
    text-align: center;
}

.member-photo {
    width: 180px;
    height: 180px;
    margin: 0 auto;
    border-radius: 50%;
    overflow: hidden;
    border: 5px solid var(--white);
    box-shadow: 0 5px 20px rgba(0,0,0,0.15);
}

.member-photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.member-info {
    margin-top: 20px;
}

.member-name {
    font-size: 18px;
    color: var(--text-dark);
    margin-bottom: 8px;
    font-weight: 600;
}

.member-title {
    font-size: 14px;
    color: var(--text-gray);
    margin: 0;
}

/* Services Icons */
.services-icons {
    padding: 50px 0;
    background: var(--white);
}

.services-row {
    display: flex;
    justify-content: space-around;
    align-items: center;
}

.service-icon-box {
    text-align: center;
    transition: 0.3s;
    padding: 20px;
    background: var(--bg-light);
    border-radius: 8px;
}

.service-icon-box:hover {
    transform: translateY(-10px);
    background: var(--primary-blue);
}

.service-icon-box p {
    color: var(--text-dark);
    font-size: 15px;
    font-weight: 600;
}

.service-icon-box:hover p {
    color: var(--white);
}

/* Footer */
.footer {
    background: #1a1a1a;
    color: var(--white);
    padding: 50px 0 20px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    margin-bottom: 40px;
}

.footer-col h4 {
    margin-bottom: 20px;
    font-size: 18px;
    font-weight: 600;
}

.footer-col ul {
    list-style: none;
}

.footer-col ul li {
    margin-bottom: 10px;
}

.footer-col a {
    color: rgba(255,255,255,0.7);
    text-decoration: none;
    font-size: 14px;
    transition: 0.3s;
}

.footer-col a:hover {
    color: var(--white);
}

.qr-codes {
    display: flex;
    gap: 20px;
}

.qr-item {
    text-align: center;
}

.qr-item img {
    width: 100px;
    height: 100px;
    background: var(--white);
    padding: 5px;
    border-radius: 4px;
    margin-bottom: 10px;
}

.qr-item p {
    font-size: 13px;
    color: rgba(255,255,255,0.7);
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-info p {
    color: rgba(255,255,255,0.6);
    font-size: 13px;
    margin-bottom: 5px;
}

.footer-badges {
    display: flex;
    gap: 15px;
}

.footer-badges img {
    height: 40px;
}

/* Responsive */
@media (max-width: 1024px) {
    .info-tabs {
        flex-wrap: wrap;
    }
    
    .info-tab-btn {
        flex: 1 1 33.333%;
    }
    
    .news-grid,
    .stats-wrapper {
        grid-template-columns: 1fr;
    }
    
    .team-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 80px;
        flex-direction: column;
        background: var(--white);
        width: 100%;
        transition: 0.3s;
        box-shadow: 0 10px 20px rgba(0,0,0,0.1);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .hero-slider {
        height: 100vh;
    }
    
    .slide-content h1 {
        font-size: 2.2rem;
    }
    
    .slide-content p {
        font-size: 1.1rem;
    }
    
    .info-tabs {
        flex-direction: column;
    }
    
    .info-tab-btn {
        border-right: none;
        border-bottom: 1px solid rgba(255,255,255,0.1);
        padding: 12px 15px;
        font-size: 14px;
    }
    
    .certificate-slider {
        margin: 0 15px;
    }
    
    .certificate-container {
        height: 400px;
    }
    
    .certificate-slide img {
        padding: 15px;
    }
    
    .cert-prev-btn,
    .cert-next-btn {
        width: 40px;
        height: 40px;
        font-size: 18px;
    }
    
    .section-title {
        font-size: 2.2rem;
        margin-bottom: 30px;
    }
    
    .section-subtitle {
        font-size: 15px;
        margin-bottom: 30px;
    }
    
    .team-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .services-row {
        flex-wrap: wrap;
        gap: 20px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .hero-slider {
        height: 100vh;
    }
    
    .slide-content h1 {
        font-size: 1.8rem;
        margin-bottom: 15px;
    }
    
    .slide-content p {
        font-size: 1rem;
    }
    
    .section-title {
        font-size: 1.8rem;
        margin-bottom: 25px;
    }
    
    .section-subtitle {
        font-size: 14px;
        margin-bottom: 25px;
    }
    
    .info-grid,
    .team-grid,
    .footer-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .dark-buttons {
        flex-direction: column;
    }
    
    .certificate-slider {
        margin: 0 10px;
    }
    
    .certificate-container {
        height: 350px;
    }
    
    .cert-prev-btn,
    .cert-next-btn {
        width: 35px;
        height: 35px;
        font-size: 16px;
    }
}

/* Dark Section with Tabs */
.dark-section-tabs {
    padding: 0;
}

.dark-bg-tabs {
    position: relative;
    background-size: cover;
    background-position: center;
    padding: 100px 0 0 0;
    color: var(--white);
    min-height: 500px;
}

.dark-header-tabs {
    position: relative;
    z-index: 2;
    margin-bottom: 80px;
    text-align: center;
    padding: 40px 0;
}

.dark-header-tabs h2 {
    font-size: 42px;
    margin-bottom: 30px;
    font-weight: 300;
    letter-spacing: 3px;
}

.dark-header-tabs h3 {
    font-size: 32px;
    margin-bottom: 25px;
    font-weight: 600;
}

.dark-header-tabs p {
    font-size: 15px;
    line-height: 1.8;
    opacity: 0.9;
    max-width: 900px;
    margin: 0 auto;
}

.dark-tab-contents {
    position: relative;
    z-index: 2;
    min-height: 150px;
}

.dark-tab-content {
    display: none;
    padding: 40px 0;
}

.dark-tab-content.active {
    display: block;
}

.dark-content-text h4 {
    font-size: 24px;
    margin-bottom: 15px;
    color: var(--white);
}

.dark-content-text p {
    font-size: 15px;
    line-height: 1.8;
    opacity: 0.9;
}

.dark-tabs {
    position: relative;
    z-index: 2;
    display: flex;
    gap: 0;
    margin-top: 120px;
}

.dark-tab-btn {
    flex: 1;
    padding: 20px 40px;
    background: rgba(0,0,0,0.5);
    border: none;
    color: rgba(255,255,255,0.9);
    font-size: 16px;
    cursor: pointer;
    transition: 0.3s;
    border-right: 1px solid rgba(255,255,255,0.1);
    position: relative;
}

.dark-tab-btn:last-child {
    border-right: none;
}

.dark-tab-btn:hover {
    background: rgba(43, 108, 176, 0.7);
    color: var(--white);
}

.dark-tab-btn.active {
    background: var(--primary-blue);
    color: var(--white);
    font-weight: 600;
}

/* Page Header */
.page-header {
    position: relative;
    height: 300px;
    background: var(--primary-blue);
    background-image: url('https://images.unsplash.com/photo-1436491865332-7a61a109cc05?w=1920&h=400&fit=crop');
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 80px;
}

.page-header-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 61, 130, 0.7);
}

.page-header .container {
    position: relative;
    z-index: 2;
    text-align: center;
    color: var(--white);
}

.page-header h1 {
    font-size: 3rem;
    margin-bottom: 15px;
    font-weight: 600;
}

.breadcrumb {
    font-size: 16px;
    opacity: 0.9;
}

.breadcrumb a {
    color: var(--white);
    text-decoration: none;
    transition: 0.3s;
}

.breadcrumb a:hover {
    text-decoration: underline;
}

/* Article Section */
.article-section {
    padding: 60px 0;
    background: var(--bg-light);
}

.article-container {
    max-width: 900px;
    margin: 0 auto;
    background: var(--white);
    padding: 40px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.article-meta {
    display: flex;
    gap: 30px;
    padding-bottom: 20px;
    margin-bottom: 30px;
    border-bottom: 2px solid var(--bg-light);
    flex-wrap: wrap;
}

.article-meta span {
    color: var(--text-gray);
    font-size: 14px;
}

.article-content h2 {
    font-size: 2rem;
    color: var(--primary-blue);
    margin-bottom: 30px;
    padding-bottom: 15px;
    border-bottom: 3px solid var(--primary-blue);
}

.article-content h3 {
    font-size: 1.5rem;
    color: var(--text-dark);
    margin-top: 40px;
    margin-bottom: 20px;
}

.article-content h4 {
    font-size: 1.2rem;
    color: var(--text-dark);
    margin-top: 30px;
    margin-bottom: 15px;
}

.article-content p {
    color: var(--text-gray);
    line-height: 1.8;
    margin-bottom: 20px;
    text-align: justify;
}

.article-content ul {
    margin: 20px 0;
    padding-left: 30px;
}

.article-content ul li {
    color: var(--text-gray);
    line-height: 1.8;
    margin-bottom: 10px;
}

.article-content strong {
    color: var(--text-dark);
    font-weight: 600;
}

.article-footer {
    margin-top: 40px;
    padding: 30px;
    background: var(--bg-light);
    border-radius: 8px;
    border-left: 4px solid var(--primary-blue);
}

.article-footer p {
    margin-bottom: 10px;
}

/* Related Articles */
.related-articles {
    margin-top: 40px;
    padding-top: 30px;
    border-top: 2px solid var(--bg-light);
}

.related-articles h3 {
    font-size: 1.5rem;
    color: var(--text-dark);
    margin-bottom: 20px;
}

.related-articles ul {
    list-style: none;
    padding: 0;
}

.related-articles ul li {
    margin-bottom: 15px;
    padding-left: 20px;
    position: relative;
}

.related-articles ul li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--primary-blue);
    font-weight: bold;
}

.related-articles ul li a {
    color: var(--text-dark);
    text-decoration: none;
    transition: 0.3s;
}

.related-articles ul li a:hover {
    color: var(--primary-blue);
    padding-left: 5px;
}

/* Responsive for Article Page */
@media (max-width: 768px) {
    .page-header {
        height: 200px;
    }
    
    .page-header h1 {
        font-size: 2rem;
    }
    
    .article-container {
        padding: 20px;
    }
    
    .article-meta {
        flex-direction: column;
        gap: 10px;
    }
    
    .article-content h2 {
        font-size: 1.5rem;
    }
    
    .article-content h3 {
        font-size: 1.3rem;
    }
}

/* News List Section */
.news-list-section {
    padding: 60px 0;
    background: var(--bg-light);
}

.news-list-container {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 40px;
}

/* Sidebar */
.news-sidebar {
    background: var(--white);
    padding: 0;
    border-radius: 8px;
    overflow: hidden;
    height: fit-content;
    position: sticky;
    top: 100px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.08);
}

.news-sidebar h3 {
    font-size: 1.2rem;
    color: var(--white);
    background: var(--primary-blue);
    padding: 20px 25px;
    margin: 0;
    font-weight: 600;
}

.category-list {
    list-style: none;
    padding: 20px;
    margin: 0;
}

.category-list li {
    margin-bottom: 8px;
}

.category-list a {
    display: block;
    padding: 12px 18px;
    color: var(--text-dark);
    text-decoration: none;
    border-radius: 4px;
    transition: all 0.3s;
    font-size: 15px;
}

.category-list a:hover {
    background: var(--bg-light);
    padding-left: 25px;
}

.category-list a.active {
    background: var(--primary-blue);
    color: var(--white);
    font-weight: 600;
}

/* News List Main */
.news-list-main {
    background: transparent;
    padding: 0;
}

.news-list-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 40px;
    padding: 25px 30px;
    background: var(--primary-blue);
    border-radius: 8px;
}

.news-list-header h2 {
    font-size: 1.8rem;
    color: var(--white);
    margin: 0;
}

.news-search {
    display: flex;
    gap: 10px;
}

.news-search input {
    padding: 10px 20px;
    border: none;
    border-radius: 4px;
    width: 280px;
    font-size: 14px;
    background: var(--white);
}

.news-search input:focus {
    outline: none;
}

.news-search button {
    padding: 10px 25px;
    background: var(--white);
    color: var(--primary-blue);
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: 0.3s;
    font-weight: 600;
}

.news-search button:hover {
    background: var(--bg-light);
}

/* News Items */
.news-items {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.news-list-item {
    display: flex;
    gap: 25px;
    padding: 25px;
    background: var(--white);
    border-radius: 8px;
    transition: all 0.3s;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.news-list-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 20px rgba(0,0,0,0.12);
}

.news-date-box {
    min-width: 80px;
    text-align: center;
    padding: 15px;
    background: var(--primary-blue);
    color: var(--white);
    border-radius: 8px;
}

.date-day {
    font-size: 2.2rem;
    font-weight: bold;
    line-height: 1;
    margin-bottom: 5px;
}

.date-month {
    font-size: 1rem;
    margin: 5px 0;
    text-transform: uppercase;
}

.date-year {
    font-size: 0.85rem;
    opacity: 0.9;
}

.news-item-content {
    flex: 1;
}

.news-item-content h3 {
    font-size: 1.3rem;
    margin-bottom: 12px;
    line-height: 1.4;
}

.news-item-content h3 a {
    color: var(--text-dark);
    text-decoration: none;
    transition: 0.3s;
}

.news-item-content h3 a:hover {
    color: var(--primary-blue);
}

.news-item-content p {
    color: var(--text-gray);
    line-height: 1.7;
    margin-bottom: 12px;
    font-size: 14px;
}

.news-item-meta {
    display: flex;
    gap: 20px;
    font-size: 13px;
    color: var(--text-gray);
}

.news-item-meta span {
    display: flex;
    align-items: center;
    gap: 5px;
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    margin-top: 50px;
}

.page-link {
    min-width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--white);
    color: var(--text-dark);
    text-decoration: none;
    border-radius: 4px;
    transition: all 0.3s;
    font-weight: 600;
    box-shadow: 0 2px 5px rgba(0,0,0,0.08);
}

.page-link:hover {
    background: var(--primary-blue);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(0,0,0,0.15);
}

.page-link.active {
    background: var(--primary-blue);
    color: var(--white);
}

.pagination span {
    color: var(--text-gray);
    padding: 0 5px;
}

/* Responsive for News List */
@media (max-width: 1024px) {
    .news-list-container {
        grid-template-columns: 240px 1fr;
        gap: 30px;
    }
}

@media (max-width: 768px) {
    .news-list-container {
        grid-template-columns: 1fr;
    }
    
    .news-sidebar {
        position: static;
    }
    
    .news-list-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 20px;
        padding: 20px;
    }
    
    .news-search {
        width: 100%;
        flex-direction: column;
    }
    
    .news-search input {
        width: 100%;
    }
    
    .news-search button {
        width: 100%;
    }
    
    .news-list-item {
        flex-direction: column;
        padding: 20px;
    }
    
    .news-date-box {
        width: fit-content;
    }
    
    .pagination {
        flex-wrap: wrap;
        gap: 6px;
    }
    
    .page-link {
        min-width: 38px;
        height: 38px;
    }
}

/* Article Share */
.article-share {
    margin-top: 40px;
    padding: 25px;
    background: var(--bg-light);
    border-radius: 8px;
}

.article-share h4 {
    font-size: 1.1rem;
    color: var(--text-dark);
    margin-bottom: 15px;
}

.share-buttons {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.share-btn {
    padding: 10px 20px;
    background: var(--white);
    color: var(--text-dark);
    text-decoration: none;
    border-radius: 4px;
    transition: 0.3s;
    font-size: 14px;
    border: 1px solid #ddd;
}

.share-btn:hover {
    background: var(--primary-blue);
    color: var(--white);
    border-color: var(--primary-blue);
}

/* Article Navigation */
.article-navigation {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 15px;
    margin-top: 40px;
    padding-top: 30px;
    border-top: 2px solid var(--bg-light);
}

.nav-btn {
    padding: 20px;
    background: var(--bg-light);
    text-decoration: none;
    border-radius: 8px;
    transition: 0.3s;
    display: flex;
    flex-direction: column;
}

.nav-btn span {
    font-size: 13px;
    color: var(--text-gray);
    margin-bottom: 8px;
}

.nav-btn p {
    font-size: 15px;
    color: var(--text-dark);
    font-weight: 600;
    margin: 0;
}

.nav-btn:hover {
    background: var(--primary-blue);
}

.nav-btn:hover span,
.nav-btn:hover p {
    color: var(--white);
}

.back-to-list {
    align-items: center;
    justify-content: center;
    background: var(--primary-blue);
}

.back-to-list span {
    color: var(--white);
    font-size: 15px;
    font-weight: 600;
    margin: 0;
}

.back-to-list:hover {
    background: var(--dark-blue);
}

.prev-article {
    text-align: left;
}

.next-article {
    text-align: right;
}

/* Responsive for Article Navigation */
@media (max-width: 768px) {
    .article-navigation {
        grid-template-columns: 1fr;
    }
    
    .prev-article,
    .next-article {
        text-align: left;
    }
    
    .share-buttons {
        flex-direction: column;
    }
    
    .share-btn {
        text-align: center;
    }
}

/* Contact Page Section */
.contact-page-section {
    padding: 60px 0;
    background: var(--bg-light);
}

.contact-intro {
    text-align: center;
    margin-bottom: 50px;
}

.contact-intro h2 {
    font-size: 2.5rem;
    color: var(--text-dark);
    margin-bottom: 15px;
}

.contact-intro p {
    font-size: 1.1rem;
    color: var(--text-gray);
}

.contact-page-content {
    margin-bottom: 60px;
}

/* Contact Info Cards */
.contact-info-cards {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 25px;
}

.contact-card {
    background: var(--white);
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.08);
    transition: 0.3s;
    text-align: center;
}

.contact-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px rgba(0,0,0,0.12);
}

.contact-card h3 {
    font-size: 1.3rem;
    color: var(--primary-blue);
    margin-bottom: 15px;
    font-weight: 600;
}

.contact-card p {
    color: var(--text-gray);
    font-size: 14px;
    margin-bottom: 5px;
    line-height: 1.6;
}

/* Departments Section */
.departments-section {
    margin-bottom: 60px;
}

.departments-section h2 {
    font-size: 2rem;
    color: var(--text-dark);
    margin-bottom: 30px;
    text-align: center;
}

.departments-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 25px;
}

.department-card {
    background: var(--white);
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.08);
    transition: 0.3s;
}

.department-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 20px rgba(0,0,0,0.12);
}

.department-card h4 {
    font-size: 1.3rem;
    color: var(--primary-blue);
    margin-bottom: 12px;
}

.department-card p {
    color: var(--text-gray);
    font-size: 14px;
    margin-bottom: 8px;
    line-height: 1.6;
}

.department-card strong {
    color: var(--text-dark);
}

/* Map Section */
.map-section {
    margin-bottom: 60px;
}

.map-section h2 {
    font-size: 2rem;
    color: var(--text-dark);
    margin-bottom: 30px;
    text-align: center;
}

.map-container {
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0,0,0,0.08);
}

/* FAQ Section */
.faq-section h2 {
    font-size: 2rem;
    color: var(--text-dark);
    margin-bottom: 30px;
    text-align: center;
}

.faq-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 25px;
}

.faq-item {
    background: var(--white);
    padding: 25px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.08);
    border-left: 4px solid var(--primary-blue);
}

.faq-item h4 {
    font-size: 1.1rem;
    color: var(--text-dark);
    margin-bottom: 12px;
}

.faq-item p {
    color: var(--text-gray);
    font-size: 14px;
    line-height: 1.6;
}

/* Responsive for Contact Page */
@media (max-width: 1024px) {
    .contact-info-cards {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .departments-grid,
    .faq-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .contact-intro h2 {
        font-size: 2rem;
    }
    
    .contact-info-cards {
        grid-template-columns: 1fr;
    }
    
    .map-container iframe {
        height: 300px;
    }
}
/* Dark Tab Content Styles */
.dark-tab-content {
    display: none;
    padding: 40px 0;
    background: rgba(0, 0, 0, 0.7);
}

.dark-tab-content.active {
    display: block;
}

.tab-content-wrapper {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    color: white;
}

.tab-content-wrapper h3 {
    font-size: 2rem;
    margin-bottom: 20px;
    color: white;
}

.tab-content-wrapper p {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 15px;
    opacity: 0.9;
}

.service-highlights {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-top: 30px;
}

.highlight-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 20px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    transition: transform 0.3s ease;
}

.highlight-item:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.15);
}

.highlight-item i {
    font-size: 2rem;
    margin-bottom: 10px;
    color: #4a90d9;
}

.highlight-item span {
    font-weight: 500;
    text-align: center;
}

/* About Section Styles */
.about-section {
    padding: 80px 0;
    background: var(--bg-light);
}

.about-wrapper {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text h3 {
    font-size: 2.2rem;
    color: var(--primary-blue);
    margin-bottom: 25px;
}

.about-text p {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 20px;
    color: var(--text-gray);
}

.about-text strong {
    color: var(--primary-blue);
    font-weight: 600;
}

@media (max-width: 768px) {
    .about-wrapper {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .service-highlights {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .tab-content-wrapper h3 {
        font-size: 1.5rem;
    }
    
    .tab-content-wrapper p {
        font-size: 1rem;
    }
}
/* Core Business Section Styles - Clean Version */
.core-business-section {
    padding: 80px 0;
    background: #f5f7fa;
}

.business-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 40px;
    margin-top: 50px;
}

.business-card {
    background: white;
    padding: 40px;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.business-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.business-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: #2b6cb0;
}

.business-icon {
    width: 80px;
    height: 80px;
    background: #2b6cb0;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 25px;
}

.business-icon i {
    font-size: 2.5rem;
    color: white;
}

.business-card h3 {
    font-size: 1.5rem;
    color: #2b6cb0;
    margin-bottom: 20px;
    line-height: 1.3;
}

.business-card h4 {
    font-size: 1.1rem;
    color: #666;
    margin-bottom: 15px;
    font-style: italic;
}

.business-desc {
    font-size: 1rem;
    line-height: 1.7;
    color: #666;
    margin-bottom: 20px;
}

.business-showcase {
    margin: 20px 0;
}

.business-images {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
    margin-bottom: 20px;
    align-items: stretch;
}

.business-showcase.single-image .business-images {
    grid-template-columns: 1fr;
}

.business-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    object-position: center;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
    display: block;
}

.business-image:hover {
    transform: scale(1.05);
}

.business-services {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
    margin: 20px 0;
}

.business-service-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 15px;
    background: rgba(43, 108, 176, 0.1);
    border-radius: 8px;
    transition: background 0.3s ease;
}

.business-service-item:hover {
    background: rgba(43, 108, 176, 0.15);
}

.business-service-item i {
    font-size: 1.2rem;
    color: #2b6cb0;
    min-width: 20px;
}

.business-service-item span {
    font-size: 0.9rem;
    font-weight: 500;
    color: #333;
}

.business-stats {
    display: flex;
    gap: 30px;
    margin: 20px 0;
    padding: 20px;
    background: #f5f7fa;
    border-radius: 10px;
}

.business-stat-item {
    text-align: center;
}

.business-stat-item .stat-number {
    display: block;
    font-size: 2rem;
    font-weight: bold;
    color: #2b6cb0;
}

.business-stat-item .stat-label {
    font-size: 0.9rem;
    color: #666;
    margin-top: 5px;
}

.business-info-box {
    background: rgba(43, 108, 176, 0.1);
    padding: 20px;
    border-radius: 10px;
    margin: 20px 0;
    border-left: 4px solid #2b6cb0;
}

.business-info-box h5 {
    color: #2b6cb0;
    font-size: 1.2rem;
    margin-bottom: 10px;
    font-weight: 600;
}

.business-info-box p {
    margin: 0 0 8px 0;
    line-height: 1.6;
    color: #666;
    font-size: 0.9rem;
}

.business-info-box p:last-child {
    margin-bottom: 0;
}

.business-info-box strong {
    color: #2b6cb0;
    font-weight: 600;
}

@media (max-width: 768px) {
    .business-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .business-card {
        padding: 30px 20px;
    }
    
    .business-images {
        grid-template-columns: 1fr;
    }
    
    .business-services {
        grid-template-columns: 1fr;
    }
    
    .business-stats {
        flex-direction: column;
        gap: 15px;
    }
}

/* Contact Section Styles */
.contact-section {
    padding: 80px 0;
    background: var(--bg-light);
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    margin: 50px 0;
}

.contact-item {
    background: white;
    padding: 40px 30px;
    border-radius: 15px;
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
}

.contact-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--primary-blue);
}

.contact-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(43, 108, 176, 0.15);
    border-color: var(--primary-blue);
}

.contact-item i {
    font-size: 2.5rem;
    color: var(--primary-blue);
    margin-bottom: 20px;
    display: block;
}

.contact-item h4 {
    font-size: 1.2rem;
    margin-bottom: 15px;
    color: var(--text-dark);
    font-weight: 600;
}

.contact-item p {
    color: var(--text-gray);
    margin: 0;
    line-height: 1.6;
    font-size: 0.95rem;
}

@media (max-width: 1024px) {
    .contact-info {
        grid-template-columns: repeat(2, 1fr);
        gap: 25px;
    }
}

@media (max-width: 768px) {
    .contact-info {
        grid-template-columns: 1fr;
        gap: 20px;
        margin: 40px 0;
    }
    
    .contact-item {
        padding: 30px 25px;
    }
    
    .contact-item i {
        font-size: 2.2rem;
        margin-bottom: 15px;
    }
    
    .contact-item h4 {
        font-size: 1.1rem;
        margin-bottom: 12px;
    }
    
    .contact-item p {
        font-size: 0.9rem;
    }
}

@media (max-width: 480px) {
    .contact-section {
        padding: 60px 0;
    }
    
    .contact-info {
        margin: 30px 0;
        gap: 15px;
    }
    
    .contact-item {
        padding: 25px 20px;
    }
    
    .contact-item i {
        font-size: 2rem;
        margin-bottom: 12px;
    }
    
    .contact-item h4 {
        font-size: 1rem;
        margin-bottom: 10px;
    }
    
    .contact-item p {
        font-size: 0.85rem;
        line-height: 1.5;
    }
}
/* Product Showcase Styles */
.product-showcase {
    margin: 20px 0;
    text-align: center;
}

.product-image {
    max-width: 100%;
    height: auto;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.certification-badge {
    margin-top: 20px;
    text-align: center;
}

.cert-image {
    max-width: 200px;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
}

/* Ensure images in business cards are responsive */
.business-card img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Gallery images styling */
.gallery-item img {
    width: 100%;
    height: 400px;
    object-fit: cover;
    border-radius: 10px;
}


@media (max-width: 768px) {
    .slide img {
        height: 400px;
    }
    
    .slide-content h1 {
        font-size: 2rem;
    }
    
    .slide-content p {
        font-size: 1.1rem;
    }
    
    .gallery-item img {
        height: 300px;
    }
    
    .cert-image {
        max-width: 150px;
    }
}
/* Achievements Section Styles */
.achievements-section {
    padding: 80px 0;
    background: white;
}

/* Download Grid Styles */
.download-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 40px;
    margin-top: 50px;
}

.download-item {
    text-align: center;
    padding: 40px 30px;
    background: var(--bg-light);
    border-radius: 15px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 2px solid transparent;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-height: 400px;
}

.download-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
    border-color: var(--primary-blue);
}

.download-icon {
    width: 80px;
    height: 80px;
    background: #dc3545;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
}

.download-icon i {
    font-size: 2.5rem;
    color: white;
}

.download-item h4 {
    font-size: 1.3rem;
    color: var(--primary-blue);
    margin-bottom: 15px;
    line-height: 1.4;
    font-weight: 600;
}

.download-item p {
    color: var(--text-gray);
    line-height: 1.6;
    margin-bottom: auto;
    font-size: 0.95rem;
    flex-grow: 1;
}

.download-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 15px 30px;
    background: var(--primary-blue);
    color: white;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 5px 15px rgba(43, 108, 176, 0.3);
    margin-top: 25px;
    align-self: center;
}

.download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(43, 108, 176, 0.4);
    background: var(--dark-blue);
}

.download-btn i {
    font-size: 1.1rem;
}

@media (max-width: 768px) {
    .download-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .download-item {
        padding: 30px 20px;
    }
    
    .download-item h4 {
        font-size: 1.1rem;
    }
    
    .download-btn {
        padding: 12px 25px;
        font-size: 0.9rem;
    }
}


/* ============================================
   About Section - 固定背景效果
   ============================================ */

/* About section 背景图片 */
.about-section-bg {
    background-image: url('../images/智造/feiji.jpg');
    background-attachment: fixed;
}

/* 确保About section的固定背景效果 */
#about {
    background-attachment: fixed;
}

/* 移动端使用滚动背景（性能优化） */
@media (max-width: 768px) {
    .about-section-bg,
    #about {
        background-attachment: scroll;
    }
}


/* ============================================
   Core Businesses 标题背景卡片效果
   ============================================ */

/* 标题背景卡片动画 */
#business .text-center > div {
    animation: fadeInUp 0.8s ease-out;
    transition: all 0.3s ease;
}

#business .text-center > div:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

/* 淡入向上动画 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 确保section背景固定 */
#business {
    background-attachment: fixed;
}

/* 移动端优化 */
@media (max-width: 768px) {
    #business {
        background-attachment: scroll;
    }
    
    #business .text-center > div {
        padding: 2rem 2.5rem;
    }
    
    #business h2 {
        font-size: 2.5rem;
    }
}

.core-section{
  position: relative;
  overflow: hidden;
}

.core-section .bg{
  position: absolute;
  inset: 0;
  background-image: url("/assets/images/智造/feiji.jpg");
  background-size: cover;
  background-position: center;
  opacity: 0.15;
  z-index: 0;
}

.core-section .container{
  position: relative !important;
  z-index: 2;
}


/* ============================================
   index1.html - Business Section 固定背景效果
   需求：背景只在section内，滚动时不动，离开section时消失
   ============================================ */

/* Section 容器 */
.business-section-with-bg {
    background-color: #f9fafb;
}

/* 固定背景层 */
.business-fixed-bg {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url('../images/智造/sy.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: fixed;
    z-index: 0;
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

/* 半透明遮罩 */
.business-fixed-bg::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.7);
}

/* 当 section 在视口中时显示背景 */
.business-section-with-bg.in-viewport .business-fixed-bg {
    opacity: 1;
}

/* 移动端优化 */
@media (max-width: 768px) {
    .business-fixed-bg {
        background-attachment: scroll;
    }
}