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

body {
    font-family: "Microsoft YaHei", "PingFang SC", -apple-system, BlinkMacSystemFont, sans-serif;
    font-size: 14px;
    color: #333;
    line-height: 1.6;
    background: #fff;
}

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

a { text-decoration: none; color: inherit; }

/* Header */
.header {
    background: #1a3a6c;
    color: #fff;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.nav-wrap {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo a {
    font-size: 22px;
    font-weight: bold;
    color: #fff;
}

.nav a {
    color: #fff;
    margin-left: 30px;
    font-size: 15px;
    transition: color 0.3s;
}

.nav a:hover {
    color: #4a90e2;
}

/* Banner */
.banner {
    background: linear-gradient(135deg, #1a3a6c 0%, #2c5aa0 100%);
    color: #fff;
    padding: 80px 0;
    text-align: center;
}

.banner-text h1 {
    font-size: 36px;
    margin-bottom: 20px;
    font-weight: 600;
}

.banner-text p {
    font-size: 18px;
    margin-bottom: 30px;
    opacity: 0.9;
}

.btn {
    display: inline-block;
    padding: 12px 36px;
    background: #fff;
    color: #1a3a6c;
    border-radius: 4px;
    font-weight: 600;
    transition: all 0.3s;
}

.btn:hover {
    background: #4a90e2;
    color: #fff;
}

/* Section */
.section {
    padding: 70px 0;
}

.section-gray {
    background: #f5f7fa;
}

.section-title {
    text-align: center;
    font-size: 30px;
    font-weight: 600;
    margin-bottom: 50px;
    color: #1a3a6c;
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 50px;
    height: 3px;
    background: #4a90e2;
    margin: 15px auto 0;
}

/* About */
.about-wrap {
    display: flex;
    gap: 50px;
    align-items: flex-start;
}

.about-text {
    flex: 1;
    font-size: 15px;
    line-height: 2;
    color: #555;
}

.about-text p {
    margin-bottom: 15px;
}

.about-features {
    flex: 1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.feature-item {
    background: #f5f7fa;
    padding: 25px 20px;
    border-radius: 8px;
    text-align: center;
    transition: all 0.3s;
}

.feature-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.1);
}

.feature-icon {
    font-size: 36px;
    margin-bottom: 10px;
}

.feature-item h3 {
    color: #1a3a6c;
    font-size: 17px;
    margin-bottom: 8px;
}

.feature-item p {
    font-size: 13px;
    color: #777;
}

/* Products */
.products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 25px;
}

.product-card {
    background: #fff;
    padding: 30px 25px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    transition: all 0.3s;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.1);
}

.product-icon {
    font-size: 40px;
    margin-bottom: 15px;
}

.product-card h3 {
    color: #1a3a6c;
    font-size: 19px;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 2px solid #e8f0fe;
}

.product-card ul {
    list-style: none;
}

.product-card li {
    padding: 6px 0;
    color: #555;
    font-size: 14px;
    padding-left: 15px;
    position: relative;
}

.product-card li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: #4a90e2;
}

/* Solutions */
.solution-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 25px;
}

.solution-item {
    background: #f5f7fa;
    padding: 30px 25px;
    border-radius: 8px;
    text-align: center;
    transition: all 0.3s;
}

.solution-item:hover {
    background: #1a3a6c;
    color: #fff;
}

.solution-item h3 {
    font-size: 18px;
    margin-bottom: 12px;
}

.solution-item p {
    font-size: 13px;
    opacity: 0.8;
    line-height: 1.8;
}

/* News */
.news-list {
    max-width: 900px;
    margin: 0 auto;
}

.news-item {
    display: flex;
    align-items: center;
    padding: 18px 0;
    border-bottom: 1px solid #e8e8e8;
}

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

.news-date {
    color: #999;
    font-size: 13px;
    margin-right: 25px;
    min-width: 100px;
}

.news-title {
    color: #333;
    font-size: 15px;
    flex: 1;
    transition: color 0.3s;
}

.news-title:hover {
    color: #1a3a6c;
}

/* Contact */
.contact-wrap {
    display: flex;
    gap: 50px;
    max-width: 1000px;
    margin: 0 auto;
}

.contact-info {
    flex: 1;
    background: #f5f7fa;
    padding: 40px 30px;
    border-radius: 8px;
}

.contact-info h3 {
    color: #1a3a6c;
    font-size: 20px;
    margin-bottom: 25px;
}

.contact-info p {
    padding: 8px 0;
    color: #555;
    font-size: 15px;
}

.contact-form {
    flex: 1;
    padding: 40px 30px;
    display: flex;
    align-items: center;
    font-size: 15px;
    color: #666;
    line-height: 2;
}

/* Footer */
.footer {
    background: #1a3a6c;
    color: #fff;
    padding: 30px 0;
    text-align: center;
}

.footer-bottom p {
    font-size: 13px;
    opacity: 0.8;
    margin: 5px 0;
}

/* Mobile responsive */
@media (max-width: 768px) {
    .nav-wrap { flex-direction: column; height: auto; padding: 15px 0; }
    .nav { margin-top: 15px; }
    .nav a { margin: 0 10px; }
    .banner { padding: 50px 0; }
    .banner-text h1 { font-size: 26px; }
    .banner-text p { font-size: 15px; }
    .section { padding: 50px 0; }
    .section-title { font-size: 24px; margin-bottom: 30px; }
    .about-wrap, .contact-wrap { flex-direction: column; gap: 30px; }
    .products-grid { grid-template-columns: 1fr; }
    .solution-grid { grid-template-columns: 1fr 1fr; }
}