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

body {
    font-family: "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", sans-serif;
    font-size: 14px;
    line-height: 1.6;
    color: #333;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

a {
    color: #0066cc;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

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

header {
    background: #fff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
}

.header-top {
    background: #0066cc;
    color: #fff;
    padding: 10px 0;
    font-size: 13px;
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.contact-header span {
    margin-left: 20px;
}

.logo-section {
    padding: 15px 0;
    background: #f8f9fa;
}

.logo-section .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 20px;
}

.logo img {
    height: 60px;
    width: auto;
}

nav ul {
    display: flex;
    list-style: none;
}

nav ul li {
    margin-left: 30px;
}

nav ul li a {
    color: #333;
    font-size: 16px;
    padding: 10px 15px;
    border-radius: 5px;
    transition: background 0.3s, color 0.3s;
}

nav ul li a:hover,
nav ul li.active a {
    color: #fff;
    background: #0066cc;
    text-decoration: none;
}

.content-wrapper {
    flex: 1;
    margin-top: 120px;
}

footer {
    background: #333;
    color: #fff;
    padding: 40px 0 20px;
    margin-top: 40px;
}

.footer-content {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    margin-bottom: 30px;
}

.footer-section {
    flex: 1;
    min-width: 250px;
    margin-bottom: 20px;
}

.footer-section h4 {
    color: #fff;
    font-size: 18px;
    margin-bottom: 15px;
    border-bottom: 2px solid #0066cc;
    padding-bottom: 10px;
}

.footer-section p {
    color: #ccc;
    margin-bottom: 10px;
    line-height: 1.8;
}

.footer-section a {
    color: #ccc;
}

.footer-section a:hover {
    color: #0066cc;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #555;
    color: #999;
    font-size: 13px;
}

.page-title {
    background: linear-gradient(135deg, #0066cc 0%, #004499 100%);
    color: #fff;
    padding: 30px 0;
    text-align: center;
}

.page-title h1 {
    font-size: 32px;
    font-weight: normal;
}

.sub-nav {
    background: #f5f5f5;
    border-bottom: 1px solid #ddd;
}

.sub-nav ul {
    display: flex;
    list-style: none;
    justify-content: center;
}

.sub-nav ul li {
    padding: 12px 20px;
}

.sub-nav ul li a {
    color: #666;
}

.sub-nav ul li a:hover,
.sub-nav ul li.active a {
    color: #0066cc;
}

.banner {
    width: 100%;
}

.banner img {
    width: 100%;
    height: auto;
    display: block;
}

.about-section {
    padding: 60px 0;
    background: #f8f9fa;
}

.about-content {
    display: flex;
    align-items: center;
    gap: 50px;
}

.about-image {
    flex: 1;
    text-align: center;
}

.about-image img {
    max-width: 100%;
    border-radius: 10px;
}

.about-text {
    flex: 1.5;
}

.section-title {
    font-size: 32px;
    color: #0066cc;
    margin-bottom: 20px;
}

.about-text p {
    color: #555;
    line-height: 2;
    margin-bottom: 15px;
}

.stats-section {
    padding: 50px 0;
    background: #fff;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 30px;
    text-align: center;
}

.stat-item {
    padding: 20px;
}

.stat-number {
    font-size: 36px;
    font-weight: bold;
    color: #0066cc;
    line-height: 1;
}

.stat-plus {
    font-size: 24px;
    color: #0066cc;
}

.stat-label {
    font-size: 14px;
    color: #666;
    margin-top: 10px;
}

.business-section {
    padding: 60px 0;
    background: #f5f5f5;
}

.business-grid {
    display: flex;
    justify-content: center;
    gap: 60px;
    margin-top: 40px;
}

.business-item {
    text-align: center;
    position: relative;
}

.business-item img {
    width: 100%;
    max-width: 400px;
    border-radius: 10px;
}

.business-link {
    display: block;
    margin-top: 15px;
    font-size: 18px;
    color: #0066cc;
}

.gallery-section {
    padding: 60px 0;
}

.gallery-section h2 {
    text-align: center;
    font-size: 28px;
    color: #333;
    margin-bottom: 30px;
}

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

.gallery-tab {
    padding: 10px 25px;
    background: #e0e0e0;
    border-radius: 20px;
    color: #666;
    cursor: pointer;
}

.gallery-tab.active {
    background: #0066cc;
    color: #fff;
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 15px;
}

.gallery-item {
    overflow: hidden;
    border-radius: 5px;
}

.gallery-item img {
    width: 100%;
    height: 120px;
    object-fit: cover;
    transition: transform 0.3s;
}

.gallery-item:hover img {
    transform: scale(1.1);
}

.certifications-section {
    padding: 50px 0;
    background: #f8f9fa;
}

.certifications-section h2 {
    text-align: center;
    font-size: 28px;
    color: #333;
    margin-bottom: 30px;
}

.certifications-scroll {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 20px;
}

.cert-item {
    background: #fff;
    padding: 15px 20px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.cert-item img {
    height: 50px;
    width: auto;
}

.news-section {
    padding: 60px 0;
}

.news-section h2 {
    text-align: center;
    font-size: 28px;
    color: #333;
    margin-bottom: 40px;
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.news-item {
    background: #fff;
    border: 1px solid #e0e0e0;
    border-radius: 10px;
    overflow: hidden;
    transition: box-shadow 0.3s;
}

.news-item:hover {
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
}

.news-image {
    width: 100%;
    height: 180px;
    object-fit: cover;
}

.news-content {
    padding: 20px;
}

.news-title {
    font-size: 16px;
    font-weight: bold;
    color: #333;
    margin-bottom: 15px;
    line-height: 1.5;
    height: 48px;
    overflow: hidden;
}

.news-title a {
    color: #333;
}

.news-title a:hover {
    color: #0066cc;
}

.news-excerpt {
    color: #666;
    font-size: 13px;
    line-height: 1.8;
    margin-bottom: 15px;
    height: 67px;
    overflow: hidden;
}

.news-date {
    color: #999;
    font-size: 12px;
}

.milestones-section {
    padding: 40px 0;
}

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

.timeline-year {
    font-size: 26px;
    color: #0066cc;
    font-weight: bold;
    margin: 35px 0 15px;
    padding-left: 20px;
    border-left: 4px solid #0066cc;
}

.timeline-items {
    padding-left: 40px;
}

.timeline-item {
    position: relative;
    padding: 12px 0 12px 30px;
    border-left: 2px solid #ddd;
    margin-left: 10px;
}

.timeline-item::before {
    content: "●";
    position: absolute;
    left: -10px;
    color: #0066cc;
    font-size: 18px;
}

.timeline-item ul {
    list-style: none;
}

.timeline-item ul li {
    padding: 6px 0;
    color: #555;
    position: relative;
    padding-left: 18px;
}

.timeline-item ul li::before {
    content: "○";
    position: absolute;
    left: 0;
    color: #999;
}

.accreditations-section {
    padding: 40px 0;
}

.intro {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 30px;
}

.intro p {
    font-size: 16px;
    color: #666;
    line-height: 2;
}

.intro-image {
    width: 100%;
    max-width: 900px;
    margin: 25px auto;
    display: block;
}

.intro-image img {
    width: 100%;
    height: auto;
    border-radius: 10px;
}

.certifications-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 25px;
    max-width: 1000px;
    margin: 35px auto;
}

.certifications-grid .cert-item {
    background: #f8f9fa;
    border: 1px solid #e0e0e0;
    border-radius: 10px;
    padding: 25px 15px;
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
}

.certifications-grid .cert-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
}

.certifications-grid .cert-item img {
    width: 70px;
    height: 70px;
    object-fit: contain;
    margin-bottom: 12px;
}

.certifications-grid .cert-item h4 {
    font-size: 14px;
    color: #333;
    font-weight: normal;
}

.company-stats {
    background: #f8f9fa;
    padding: 30px;
    border-radius: 10px;
    text-align: center;
    margin: 30px 0;
}

.company-stats h3 {
    font-size: 20px;
    color: #333;
    margin-bottom: 20px;
}

.awards-list {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 20px;
    margin: 25px 0;
}

.award-item {
    background: #fff;
    border: 1px solid #e0e0e0;
    padding: 15px 25px;
    border-radius: 8px;
    text-align: center;
    min-width: 180px;
}

.award-item .rank {
    font-size: 32px;
    font-weight: bold;
    color: #ff6600;
}

.award-item .desc {
    color: #666;
    font-size: 13px;
    margin-top: 8px;
}

.advantages {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 25px;
    margin-top: 30px;
}

.advantage-item {
    background: #fff;
    border: 1px solid #e8e8e8;
    border-radius: 10px;
    padding: 25px;
    text-align: center;
    transition: box-shadow 0.3s;
}

.advantage-item:hover {
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
}

.advantage-item img {
    width: 100%;
    max-width: 280px;
    height: 180px;
    object-fit: cover;
    border-radius: 5px;
    margin-bottom: 15px;
}

.advantage-item h4 {
    font-size: 16px;
    color: #333;
    margin-bottom: 12px;
}

.advantage-item p {
    color: #666;
    font-size: 13px;
    line-height: 1.8;
    text-align: left;
}

@media (max-width: 992px) {
    .stats-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    .news-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .gallery-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    .advantages {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: 10px;
    }
    .logo-section .container {
        flex-direction: column;
        gap: 15px;
    }
    .header-left {
        flex-direction: column;
    }
    nav ul {
        flex-wrap: wrap;
        justify-content: center;
    }
    nav ul li {
        margin: 5px 10px;
    }
    .content-wrapper {
        margin-top: 180px;
    }
    .about-content {
        flex-direction: column;
    }
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .business-grid {
        flex-direction: column;
    }
    .news-grid {
        grid-template-columns: 1fr;
    }
    .gallery-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    .advantages {
        grid-template-columns: 1fr;
    }
    .stats-grid {
        flex-direction: column;
        gap: 20px;
    }
    .certifications-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .timeline-year {
        font-size: 22px;
    }
}

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