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

:root {
    --tiffany-blue: #00CED1;
    --tiffany-light: #E0F7FA;
    --tiffany-dark: #008B8B;
    --dark-blue: #0A192F;
    --gray: #64FFDA;
    --white: #FFFFFF;
    --light-gray: #F8F9FA;
}

body {
    font-family: 'Microsoft YaHei', 'PingFang SC', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #E0F7FA;
}

html {
    scroll-behavior: smooth;
}

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

@media (max-width: 768px) {
    .container {
        width: 100%;    /* 容器宽度占满屏幕 */
        flex-direction: column; /* 改为垂直排列 */
    }
}

header {
    background: linear-gradient(135deg, #0891b2 0%, #06b6d4 50%, #22d3ee 100%);
    padding: 15px 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 20px rgba(8, 145, 178, 0.3);
}

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

.logo {
    display: flex;
    align-items: center;
}

.logo img {
    height: 80px;
    width: auto;
}

.logo h1 {
    color: var(--tiffany-blue);
    font-size: 24px;
    margin-left: 15px;
    font-weight: 700;
}

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

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

nav ul li a {
    color: var(--white);
    text-decoration: none;
    font-size: 16px;
    font-weight: 500;
    position: relative;
    transition: all 0.3s ease;
}

nav ul li a:hover {
    color: var(--tiffany-blue);
}

nav ul li a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--tiffany-blue);
    transition: width 0.3s ease;
}

nav ul li a:hover::after {
    width: 100%;
}

.hero {
    background: linear-gradient(135deg, var(--dark-blue) 0%, #112240 50%, #88c1d5 90%);
    padding: 150px 0 50px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%2300CED1' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
}

.hero-content h2 {
    font-size: 56px;
    color: var(--white);
    margin-bottom: 20px;
    font-weight: 700;
    letter-spacing: 2px;
}

.hero-content h2 span {
    color: var(--tiffany-blue);
}

.hero-content p {
    font-size: 20px;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 40px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

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

.btn {
    display: inline-block;
    padding: 15px 40px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 16px;
    transition: all 0.3s ease;
}

.btn-primary {
    background: linear-gradient(135deg, var(--tiffany-blue) 0%, #00B4B6 100%);
    color: var(--white);
    box-shadow: 0 4px 20px rgba(0, 206, 209, 0.4);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 30px rgba(0, 206, 209, 0.6);
}

.btn-secondary {
    border: 2px solid var(--tiffany-blue);
    color: var(--tiffany-blue);
}

.btn-secondary:hover {
    background: var(--tiffany-blue);
    color: var(--white);
}

.stats {
    background: var(--white);
    padding: 50px 0;
}

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

.stat-item {
    text-align: center;
    padding: 30px;
    background: linear-gradient(135deg, var(--tiffany-light) 0%, #FFF 100%);
    border-radius: 20px;
    box-shadow: 0 4px 15px rgba(0, 206, 209, 0.1);
    transition: all 0.3s ease;
}

.stat-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 8px 25px rgba(0, 206, 209, 0.2);
}

.stat-item i {
    font-size: 48px;
    color: var(--tiffany-blue);
    margin-bottom: 20px;
}

.stat-item h3 {
    font-size: 36px;
    color: var(--dark-blue);
    margin-bottom: 10px;
}

.stat-item p {
    color: #666;
    font-size: 14px;
}

.features {
    background: linear-gradient(180deg, #F8F9FA 0%, #FFF 100%);
    padding: 50px 0;
}

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

.section-title h2 {
    font-size: 36px;
    color: var(--dark-blue);
    margin-bottom: 20px;
    position: relative;
}

.section-title h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--tiffany-blue) 0%, var(--tiffany-dark) 100%);
    border-radius: 2px;
}

.section-title p {
    color: #666;
    font-size: 16px;
}

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

.features-grid2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.features-grid4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.certificate-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-top: 30px;
}

.certificate-item {
    background: var(--white);
    padding: 15px;
    border-radius: 15px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    text-align: center;
}

.certificate-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 206, 209, 0.15);
}

.certificate-item img {
    width: 80%;
    height: 400px;
    padding: 2em；
    object-fit: cover;
    border-radius: 10px;
    margin-bottom: 15px;
    border: 1px solid #eee;
}

.certificate-item p {
    font-size: 13px;
    color: #555;
    line-height: 1.5;
    margin: 0;
}

.feature-card {
    background: var(--white);
    padding: 40px 30px;
    border-radius: 20px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
    border-left: 4px solid transparent;
}

.feature-card:hover .feature-card2:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 30px rgba(0, 206, 209, 0.15);
    border-left-color: var(--tiffany-blue);
}

.feature-card i {
    font-size: 40px;
    color: var(--tiffany-blue);
    margin-bottom: 20px;
    display: block;
}

.feature-card h3 {
    font-size: 20px;
    color: var(--dark-blue);
    margin-bottom: 15px;
}

.feature-card p {
    color: #666;
    font-size: 14px;
    line-height: 1.8;
}

.feature-card2 {
    background: var(--white);
    padding: 40px 30px;
    border-radius: 20px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
    border-left: 4px solid transparent;
}

.feature-card2 img {
    max-width: 80%;
    max-height: 80%;
    object-fit: cover;
    max-width: auto;
}

.about-section {
    padding: 50px 0;
    background: var(--white);
}

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

.about-text h3 {
    font-size: 28px;
    color: var(--dark-blue);
    margin-bottom: 20px;
    margin-left: 1em;
}

.about-text p {
    color: #666;
    margin-bottom: 20px;
    line-height: 1.8;
}

.about-text ul {
    list-style: none;
}

.about-text ul li {
    padding: 10px 0;
    color: #666;
    position: relative;
    padding-left: 25px;
}

.about-text ul li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 14px;
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.about-image {
    min-height: 300px;
    max-width: 80%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.about-image img {
    width: 100%;
    height: auto;
    max-height: 500px;
    object-fit: cover;
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0, 206, 209, 0.2);
}


.about-image2 img {
    width: 35%;
    height: auto;
    margin-left: 40%;
    object-fit: cover;
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0, 206, 209, 0.2);
}

.about-image3 img {
    width: 80%;
    height: auto;
    object-fit: cover;
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0, 206, 209, 0.2);
}

.timeline-container {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.timeline-card {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 20px;
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    cursor: pointer;
    transition: all 0.3s ease;
    transform: scale(1);
}

.timeline-card:hover {
    box-shadow: 0 4px 20px rgba(0, 206, 209, 0.15);
}

.timeline-card.active {
    transform: scale(1.03) translateY(-8px);
    box-shadow: 0 20px 50px rgba(0, 206, 209, 0.35), 0 0 0 1px rgba(0, 206, 209, 0.2);
    background: linear-gradient(135deg, #E0F7FA 0%, #fff 100%);
    border: 1px solid rgba(0, 206, 209, 0.3);
}

.timeline-year {
    width: 80px;
    height: 80px;
    flex-shrink: 0;
    flex-basis: 80px;
    background: linear-gradient(135deg, var(--tiffany-blue), var(--tiffany-dark));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-weight: 700;
    font-size: 16px;
    transition: all 0.3s ease;
    overflow: hidden;
    box-sizing: content-box;
}

.timeline-card.active .timeline-year {
    transform: scale(1.1);
    box-shadow: 0 4px 20px rgba(0, 206, 209, 0.4);
}

.timeline-content h4 {
    color: var(--dark-blue);
    margin-bottom: 5px;
    font-size: 18px;
    transition: all 0.3s ease;
}

.timeline-card.active .timeline-content h4 {
    color: var(--tiffany-blue);
    font-size: 20px;
}

.timeline-content p {
    color: #666;
    font-size: 14px;
    margin: 0;
    transition: all 0.3s ease;
}

.timeline-card.active .timeline-content p {
    font-size: 15px;
}

.news-section {
    background: linear-gradient(135deg, var(--dark-blue) 0%, #112240 100%);
    padding: 50px 0;
}

.news-section .section-title h2 {
    color: var(--white);
}

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

.news-card {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 15px;
    padding: 30px;
    transition: all 0.3s ease;
    border: 1px solid rgba(0, 206, 209, 0.1);
}

.news-card:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--tiffany-blue);
    transform: translateY(-5px);
}

.news-card .date {
    color: var(--tiffany-blue);
    font-size: 12px;
    margin-bottom: 15px;
}

.news-card h3 {
    color: var(--white);
    font-size: 18px;
    margin-bottom: 10px;
}

.news-card p {
    color: rgba(255, 255, 255, 0.6);
    font-size: 14px;
}

footer {
    background: #0A192F;
    padding: 60px 0 30px;
}

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

.footer-logo {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
}

.footer-logo img {
    height: 40px;
    width: auto;
}

.footer-logo span {
    color: var(--tiffany-blue);
    font-size: 20px;
    font-weight: 700;
    margin-left: 10px;
}

.footer-about p {
    color: rgba(255, 255, 255, 0.6);
    font-size: 14px;
    line-height: 1.8;
}

.footer-links h4, .footer-contact h4 {
    color: var(--white);
    font-size: 16px;
    margin-bottom: 20px;
}

.footer-links ul, .footer-contact ul {
    list-style: none;
}

.footer-links ul li, .footer-contact ul li {
    margin-bottom: 12px;
}

.footer-links ul li a {
    color: rgba(255, 255, 255, 0.6);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s ease;
}

.footer-links ul li a:hover {
    color: var(--tiffany-blue);
}

.footer-contact ul li {
    color: rgba(255, 255, 255, 0.6);
    font-size: 14px;
}

.footer-contact ul li i {
    color: var(--tiffany-blue);
    margin-right: 10px;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 30px;
    text-align: center;
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.4);
    font-size: 12px;
}

.footer-bottom a {
    color: rgba(255, 255, 255, 0.6);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s ease;
}

.footer-bottom a:hover {
    color: var(--tiffany-blue);
}

.feature-card.clickable .feature-card2.clickable {
    cursor: pointer;
    position: relative;
}

.feature-card.clickable:hover .feature-card2.clickable:hover  {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 15px 40px rgba(0, 206, 209, 0.25);
}

.card-action {
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px solid rgba(0, 206, 209, 0.2);
    color: var(--tiffany-blue);
    font-size: 14px;
    font-weight: 500;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 5px;
    transition: all 0.3s ease;
}

.feature-card.clickable:hover .card-action {
    gap: 10px;
}

.modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(5px);
    z-index: 2000;
    animation: fadeIn 0.3s ease;
}

.modal-overlay.active {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    display: none;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: #fff;
    border-radius: 20px;
    max-width: 700px;
    width: 90%;
    max-height: 85vh;
    overflow-y: auto;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    animation: slideUp 0.3s ease;
    z-index: 2001;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from { 
        opacity: 0;
        transform: translateY(30px);
    }
    to { 
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 25px 30px;
    background: linear-gradient(135deg, var(--tiffany-blue) 0%, #00B4B6 100%);
    border-radius: 20px 20px 0 0;
}

.modal-header h2 {
    color: #fff;
    font-size: 24px;
    margin: 0;
}

.close-modal {
    color: #fff;
    font-size: 32px;
    font-weight: 300;
    cursor: pointer;
    line-height: 1;
    transition: transform 0.2s ease;
}

.close-modal:hover {
    transform: rotate(90deg);
}

.close-modal-2 {
    color: #fff;
    font-size: 32px;
    font-weight: 300;
    cursor: pointer;
    line-height: 1;
    transition: transform 0.2s ease;
}

.close-modal-2:hover {
    transform: rotate(90deg);
}

.close-modal-3 {
    color: #fff;
    font-size: 32px;
    font-weight: 300;
    cursor: pointer;
    line-height: 1;
    transition: transform 0.2s ease;
}

.close-modal-3:hover {
    transform: rotate(90deg);
}

.close-modal-4 {
    color: #fff;
    font-size: 32px;
    font-weight: 300;
    cursor: pointer;
    line-height: 1;
    transition: transform 0.2s ease;
}

.close-modal-4:hover {
    transform: rotate(90deg);
}

.close-modal-5 {
    color: #fff;
    font-size: 32px;
    font-weight: 300;
    cursor: pointer;
    line-height: 1;
    transition: transform 0.2s ease;
}

.close-modal-5:hover {
    transform: rotate(90deg);
}

.close-modal-6 {
    color: #fff;
    font-size: 32px;
    font-weight: 300;
    cursor: pointer;
    line-height: 1;
    transition: transform 0.2s ease;
}

.close-modal-6:hover {
    transform: rotate(90deg);
}

.modal-body {
    padding: 35px;
}

.modal-title-section {
    text-align: center;
    padding: 20px;
    background: linear-gradient(135deg, var(--tiffany-light) 0%, #fff 100%);
    border-radius: 15px;
    margin-bottom: 30px;
    border: 1px solid rgba(0, 206, 209, 0.2);
}

.modal-title-section p {
    font-size: 17px;
    color: #333;
    font-weight: 500;
    margin: 0;
    line-height: 1.6;
}

.modal-card {
    background: #fff;
    border-radius: 15px;
    margin-bottom: 20px;
    border: 1px solid rgba(0, 206, 209, 0.2);
    overflow: hidden;
    transition: all 0.3s ease;
}

.modal-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0, 206, 209, 0.15);
}

.card-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 20px 25px;
    background: linear-gradient(135deg, var(--tiffany-blue) 0%, #00B4B6 100%);
}

.card-header i {
    color: #fff;
    font-size: 20px;
}

.card-header h3 {
    color: #fff;
    font-size: 18px;
    font-weight: 600;
    margin: 0;
}

.card-content {
    padding: 20px 25px;
}

.card-content p {
    color: #555;
    font-size: 15px;
    line-height: 1.8;
    margin: 0;
    text-align: justify;
}

@media (max-width: 768px) {

    nav ul {
        display: none;
    }
    
    .hero-content h2 {
        font-size: 36px;
    }
    
    .hero-content p {
        font-size: 16px;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .news-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
}