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

body {
    font-family: 'Microsoft YaHei', 'PingFang SC', sans-serif;
    font-size: 14px;
    color: #333;
    line-height: 1.6;
    background-color: #f5fafc;
}

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

header {
    background: linear-gradient(135deg, #4a90d9 0%, #6bb3e8 100%);
    box-shadow: 0 2px 10px rgba(74, 144, 217, 0.3);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
}

.header-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
}

.logo {
    display: flex;
    align-items: center;
    color: #fff;
    text-decoration: none;
}

.logo img {
    width: 50px;
    height: 50px;
    margin-right: 15px;
}

.logo h1 {
    font-size: 24px;
    font-weight: 600;
}

.logo span {
    font-size: 12px;
    display: block;
    opacity: 0.8;
}

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

nav ul li {
    margin-left: 35px;
}

nav ul li a {
    color: #fff;
    text-decoration: none;
    font-size: 16px;
    padding: 10px 15px;
    border-radius: 5px;
    transition: all 0.3s ease;
}

nav ul li a:hover,
nav ul li a.active {
    background: rgba(255, 255, 255, 0.2);
}

.hero {
    background: linear-gradient(135deg, #4a90d9 0%, #87ceeb 50%, #e8f4fd 100%);
    padding: 150px 0 100px;
    text-align: center;
    color: #fff;
}

.hero h2 {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 20px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
}

.hero p {
    font-size: 20px;
    margin-bottom: 40px;
    opacity: 0.9;
}

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

.btn {
    display: inline-block;
    padding: 15px 40px;
    font-size: 16px;
    font-weight: 600;
    border-radius: 30px;
    text-decoration: none;
    transition: all 0.3s ease;
}

.btn-primary {
    background: #fff;
    color: #4a90d9;
    box-shadow: 0 4px 15px rgba(255, 255, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 255, 255, 0.4);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.2);
    color: #fff;
    border: 2px solid #fff;
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.3);
}

.section {
    padding: 80px 0;
}

.privacy-section {
    padding: 120px 0 80px;
    background: #fff;
}

.privacy-section h1 {
    color: #333;
    font-size: 32px;
    margin-bottom: 10px;
    text-align: center;
}

.privacy-section .update-date {
    color: #999;
    font-size: 14px;
    text-align: center;
    margin-bottom: 40px;
}

.privacy-content {
    max-width: 800px;
    margin: 0 auto;
    color: #555;
    line-height: 1.8;
}

.privacy-content h2 {
    color: #4a90d9;
    font-size: 18px;
    margin: 30px 0 15px;
    padding-bottom: 10px;
    border-bottom: 1px solid #eee;
}

.privacy-content p {
    margin-bottom: 15px;
    text-indent: 2em;
}

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

.section-title h2 {
    font-size: 32px;
    color: #2c3e50;
    margin-bottom: 15px;
}

.section-title p {
    color: #7f8c8d;
    font-size: 16px;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, #4a90d9, #6bb3e8);
    margin: 20px auto 0;
    border-radius: 2px;
}

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

.product-card {
    background: #fff;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(74, 144, 217, 0.1);
    transition: all 0.3s ease;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(74, 144, 217, 0.15);
}

.product-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

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

.product-card h3 {
    font-size: 20px;
    color: #2c3e50;
    margin-bottom: 10px;
}

.product-card p {
    color: #7f8c8d;
    margin-bottom: 20px;
}

.product-card .btn {
    padding: 10px 25px;
    font-size: 14px;
}

.features {
    background: #fff;
}

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

.feature-item {
    text-align: center;
    padding: 30px;
}

.feature-item .icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, #4a90d9, #6bb3e8);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 32px;
}

.feature-item h3 {
    font-size: 18px;
    color: #2c3e50;
    margin-bottom: 10px;
}

.feature-item p {
    color: #7f8c8d;
    font-size: 14px;
}

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

.solution-card {
    background: #fff;
    border-radius: 15px;
    padding: 35px;
    box-shadow: 0 4px 20px rgba(74, 144, 217, 0.1);
    transition: all 0.3s ease;
    display: flex;
    gap: 25px;
}

.solution-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(74, 144, 217, 0.15);
}

.solution-card .icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, #4a90d9, #6bb3e8);
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 28px;
    flex-shrink: 0;
}

.solution-card h3 {
    font-size: 20px;
    color: #2c3e50;
    margin-bottom: 10px;
}

.solution-card p {
    color: #7f8c8d;
}

.stats {
    background: linear-gradient(135deg, #4a90d9 0%, #6bb3e8 100%);
    color: #fff;
}

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

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

.stat-item .number {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 10px;
}

.stat-item .label {
    font-size: 16px;
    opacity: 0.9;
}

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

.case-card {
    background: #fff;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(74, 144, 217, 0.1);
}

.case-card img {
    width: 100%;
    height: 180px;
    object-fit: cover;
}

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

.case-card h3 {
    font-size: 18px;
    color: #2c3e50;
    margin-bottom: 10px;
}

.case-card p {
    color: #7f8c8d;
    font-size: 14px;
    margin-bottom: 15px;
}

.case-card .meta {
    display: flex;
    justify-content: space-between;
    color: #95a5a6;
    font-size: 12px;
}

.news-list {
    max-width: 800px;
    margin: 0 auto;
}

.news-item {
    background: #fff;
    padding: 30px;
    border-radius: 15px;
    margin-bottom: 20px;
    box-shadow: 0 2px 10px rgba(74, 144, 217, 0.08);
    display: flex;
    gap: 25px;
}

.news-item img {
    width: 200px;
    height: 120px;
    object-fit: cover;
    border-radius: 10px;
}

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

.news-item h3 {
    font-size: 20px;
    color: #2c3e50;
    margin-bottom: 10px;
}

.news-item p {
    color: #7f8c8d;
    margin-bottom: 15px;
}

.news-item .meta {
    color: #95a5a6;
    font-size: 12px;
}

.about-section {
    background: #fff;
}

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

.about-content img {
    width: 500px;
    height: 350px;
    object-fit: cover;
    border-radius: 15px;
}

.about-content .text {
    flex: 1;
}

.about-content h3 {
    font-size: 24px;
    color: #2c3e50;
    margin-bottom: 20px;
}

.about-content p {
    color: #7f8c8d;
    margin-bottom: 15px;
    line-height: 1.8;
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-bottom: 50px;
}

.contact-item {
    background: #fff;
    padding: 30px;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 2px 10px rgba(74, 144, 217, 0.08);
}

.contact-item .icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 15px;
    background: linear-gradient(135deg, #4a90d9, #6bb3e8);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 24px;
}

.contact-item h4 {
    font-size: 18px;
    color: #2c3e50;
    margin-bottom: 10px;
}

.contact-item p {
    color: #7f8c8d;
}

.contact-form {
    background: #fff;
    padding: 40px;
    border-radius: 15px;
    box-shadow: 0 4px 20px rgba(74, 144, 217, 0.1);
}

.contact-form .form-group {
    margin-bottom: 20px;
}

.contact-form label {
    display: block;
    margin-bottom: 8px;
    color: #2c3e50;
    font-weight: 500;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 15px;
    border: 1px solid #e0e0e0;
    border-radius: 10px;
    font-size: 14px;
    transition: all 0.3s ease;
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: #4a90d9;
    box-shadow: 0 0 0 3px rgba(74, 144, 217, 0.1);
}

.contact-form textarea {
    resize: vertical;
    min-height: 120px;
}

footer {
    background: #2c3e50;
    color: #fff;
    padding: 60px 0;
}

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

.footer-section h4 {
    font-size: 18px;
    margin-bottom: 20px;
    color: #fff;
}

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

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

.footer-section ul li a {
    color: #bdc3c7;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section ul li a:hover {
    color: #4a90d9;
}

.footer-section p {
    color: #bdc3c7;
    margin-bottom: 15px;
}

.footer-bottom {
    padding: 15px 0;
    text-align: center;
    color: #666;
    font-size: 12px;
}

.footer-bottom p {
    margin: 0;
}

.footer-bottom .icon-fire {
    margin: 0 8px;
    font-size: 14px;
}

.footer-bottom .privacy-policy {
    color: #666;
    text-decoration: none;
    margin-left: 10px;
}

.footer-bottom .privacy-policy:hover {
    color: #999;
    text-decoration: underline;
}

.floating-contact {
    position: fixed;
    right: 30px;
    bottom: 30px;
    padding: 12px 20px;
    background: linear-gradient(135deg, #4a90d9, #6bb3e8);
    border-radius: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 16px;
    box-shadow: 0 4px 15px rgba(74, 144, 217, 0.4);
    cursor: pointer;
    z-index: 999;
    transition: all 0.3s ease;
}

.floating-contact i {
    margin-right: 8px;
    font-size: 18px;
}

.floating-contact:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 20px rgba(74, 144, 217, 0.5);
}

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 2000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: #fff;
    padding: 40px;
    border-radius: 15px;
    width: 450px;
    max-width: 90%;
    position: relative;
}

.modal-content .close {
    position: absolute;
    top: 15px;
    right: 15px;
    font-size: 24px;
    cursor: pointer;
    color: #95a5a6;
}

.modal-content h3 {
    font-size: 22px;
    color: #2c3e50;
    margin-bottom: 25px;
    text-align: center;
}

@media (max-width: 1200px) {
    .container {
        width: 100%;
    }
    
    .products-grid,
    .cases-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .features-grid,
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    nav ul {
        display: none;
    }
    
    .hero h2 {
        font-size: 32px;
    }
    
    .hero p {
        font-size: 16px;
    }
    
    .products-grid,
    .solutions-grid,
    .cases-grid,
    .features-grid,
    .stats-grid,
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .about-content {
        flex-direction: column;
    }
    
    .about-content img {
        width: 100%;
    }
    
    .news-item {
        flex-direction: column;
    }
    
    .news-item img {
        width: 100%;
    }
}