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

body {
    font-family: 'Microsoft YaHei', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background: #f5f7fa;
}

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

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
}

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

header {
    background: #fff;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-top {
    background: #1e3a8a;
    color: #fff;
    padding: 10px 0;
    font-size: 14px;
}

.header-main {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
}

.logo {
    font-size: 28px;
    font-weight: bold;
    color: #1e3a8a;
}

nav ul {
    display: flex;
    gap: 30px;
}

nav a {
    font-size: 16px;
    font-weight: 500;
    transition: color 0.3s;
}

nav a:hover, nav a.active {
    color: #1e3a8a;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
}

.banner {
    background: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 100%);
    color: #fff;
    padding: 80px 0;
    text-align: center;
}

.banner h1 {
    font-size: 42px;
    margin-bottom: 20px;
}

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

.btn-group {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-block;
    padding: 14px 32px;
    border-radius: 6px;
    font-size: 16px;
    font-weight: 600;
    transition: all 0.3s;
    cursor: pointer;
}

.btn-primary {
    background: #fff;
    color: #1e3a8a;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.2);
}

.btn-secondary {
    background: transparent;
    border: 2px solid #fff;
    color: #fff;
}

.btn-secondary:hover {
    background: #fff;
    color: #1e3a8a;
}

.section {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 50px;
}

.section-title h2 {
    font-size: 36px;
    color: #1e3a8a;
    margin-bottom: 15px;
}

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

.bg-white {
    background: #fff;
}

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

.feature-item {
    text-align: center;
    padding: 40px 25px;
    background: #f8fafc;
    border-radius: 10px;
    transition: all 0.3s;
}

.feature-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.feature-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.feature-item h3 {
    font-size: 20px;
    margin-bottom: 15px;
    color: #1e3a8a;
}

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

.service-card {
    background: #fff;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.08);
    transition: all 0.3s;
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.15);
}

.service-img {
    height: 200px;
    background: linear-gradient(135deg, #3b82f6, #1e3a8a);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 60px;
}

.service-content {
    padding: 30px;
}

.service-content h3 {
    font-size: 22px;
    margin-bottom: 15px;
    color: #1e3a8a;
}

.service-content ul {
    margin: 20px 0;
}

.service-content li {
    padding: 8px 0;
    padding-left: 25px;
    position: relative;
}

.service-content li:before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #10b981;
    font-weight: bold;
}

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

.case-item {
    background: #fff;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.08);
}

.case-item h3 {
    color: #1e3a8a;
    margin-bottom: 15px;
}

.case-meta {
    color: #999;
    font-size: 14px;
    margin-bottom: 15px;
}

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

.news-card {
    background: #fff;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.08);
    transition: all 0.3s;
}

.news-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.15);
}

.news-img {
    height: 180px;
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 48px;
}

.news-content {
    padding: 25px;
}

.news-content h3 {
    font-size: 18px;
    margin-bottom: 10px;
    color: #1e3a8a;
}

.news-meta {
    color: #999;
    font-size: 14px;
    margin-bottom: 15px;
}

.news-content p {
    color: #666;
    font-size: 14px;
}

.cta {
    background: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 100%);
    color: #fff;
    padding: 60px 0;
    text-align: center;
}

.cta h2 {
    font-size: 32px;
    margin-bottom: 15px;
}

.cta p {
    font-size: 16px;
    margin-bottom: 30px;
    opacity: 0.9;
}

footer {
    background: #1e293b;
    color: #cbd5e1;
    padding: 60px 0 30px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-about h3 {
    font-size: 24px;
    color: #fff;
    margin-bottom: 20px;
}

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

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

.footer-links a:hover {
    color: #3b82f6;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid #334155;
    font-size: 14px;
}

.breadcrumb {
    background: #f1f5f9;
    padding: 15px 0;
    font-size: 14px;
}

.breadcrumb a:hover {
    color: #1e3a8a;
}

.content-page {
    padding: 60px 0;
}

.content-wrapper {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 40px;
}

.sidebar {
    background: #fff;
    border-radius: 10px;
    padding: 30px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.08);
    height: fit-content;
}

.sidebar h3 {
    font-size: 20px;
    color: #1e3a8a;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 2px solid #e2e8f0;
}

.sidebar-nav li {
    margin-bottom: 12px;
}

.sidebar-nav a {
    display: block;
    padding: 10px 15px;
    background: #f8fafc;
    border-radius: 5px;
    transition: all 0.3s;
}

.sidebar-nav a:hover, .sidebar-nav a.active {
    background: #1e3a8a;
    color: #fff;
}

.main-content {
    background: #fff;
    border-radius: 10px;
    padding: 40px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.08);
}

.main-content h1 {
    font-size: 32px;
    color: #1e3a8a;
    margin-bottom: 30px;
    padding-bottom: 15px;
    border-bottom: 2px solid #e2e8f0;
}

.main-content h2 {
    font-size: 24px;
    color: #1e3a8a;
    margin: 30px 0 15px;
}

.main-content p {
    margin-bottom: 20px;
    line-height: 1.8;
    color: #444;
}

.main-content ul, .main-content ol {
    margin: 20px 0;
    padding-left: 30px;
}

.main-content li {
    margin-bottom: 10px;
    line-height: 1.8;
}

.contact-form {
    max-width: 700px;
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
}

.form-control {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #e2e8f0;
    border-radius: 6px;
    font-size: 16px;
    font-family: inherit;
}

.form-control:focus {
    outline: none;
    border-color: #3b82f6;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

textarea.form-control {
    min-height: 150px;
    resize: vertical;
}

.news-list .news-item {
    display: flex;
    gap: 25px;
    padding: 25px 0;
    border-bottom: 1px solid #e2e8f0;
}

.news-list .news-thumb {
    flex-shrink: 0;
    width: 220px;
    height: 150px;
    background: linear-gradient(135deg, #3b82f6, #1e3a8a);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 40px;
}

.news-list .news-info h3 {
    font-size: 20px;
    margin-bottom: 10px;
    color: #1e3a8a;
}

.news-list .news-info p {
    color: #666;
    margin-bottom: 10px;
}

.pagination {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 40px;
}

.pagination a, .pagination span {
    display: inline-block;
    padding: 10px 18px;
    border: 1px solid #e2e8f0;
    border-radius: 5px;
    transition: all 0.3s;
}

.pagination a:hover, .pagination .current {
    background: #1e3a8a;
    color: #fff;
    border-color: #1e3a8a;
}

.float-buttons {
    position: fixed;
    right: 20px;
    bottom: 30px;
    z-index: 99;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.float-btn {
    width: 55px;
    height: 55px;
    border-radius: 50%;
    background: linear-gradient(135deg, #1e3a8a, #3b82f6);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    box-shadow: 0 5px 20px rgba(30, 58, 138, 0.4);
    transition: all 0.3s;
}

.float-btn:hover {
    transform: scale(1.1);
}

@media (max-width: 992px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .service-grid, .news-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
    .content-wrapper {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    nav ul {
        display: none;
    }
    .mobile-menu-btn {
        display: block;
    }
    .banner h1 {
        font-size: 30px;
    }
    .features-grid, .service-grid, .news-grid, .cases-grid {
        grid-template-columns: 1fr;
    }
    .footer-grid {
        grid-template-columns: 1fr;
    }
    .news-list .news-item {
        flex-direction: column;
    }
    .news-list .news-thumb {
        width: 100%;
        height: 180px;
    }
}