/* 基础样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans SC', sans-serif;
    line-height: 1.6;
    color: #333;
    overflow-x: hidden;
}

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

/* 导航栏样式 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    transition: all 0.3s ease;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo h2 {
    color: #1e3a8a;
    font-size: 24px;
    font-weight: 700;
    margin-bottom: -5px;
}

.nav-logo span {
    color: #d97706;
    font-size: 12px;
    font-weight: 400;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-menu a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-menu a:hover {
    color: #1e3a8a;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -5px;
    left: 50%;
    background: #d97706;
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

.nav-menu a:hover::after {
    width: 100%;
}

.nav-contact {
    color: #1e3a8a;
    font-weight: 500;
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: #333;
    margin: 3px 0;
    transition: 0.3s;
}

/* 下拉菜单样式 */
.dropdown {
    position: relative;
}

.dropdown-arrow {
    font-size: 10px;
    margin-left: 5px;
    transition: transform 0.3s ease;
}

.dropdown:hover .dropdown-arrow {
    transform: rotate(180deg);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: white;
    min-width: 220px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
    border-radius: 8px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    z-index: 1001;
    padding: 10px 0;
    border: 1px solid rgba(0, 0, 0, 0.1);
}

.dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu li {
    list-style: none;
}

.dropdown-menu a {
    display: block;
    padding: 12px 20px;
    color: #333;
    text-decoration: none;
    font-weight: 400;
    transition: all 0.3s ease;
    border-radius: 0;
}

.dropdown-menu a:hover {
    background: #f8fafc;
    color: #1e3a8a;
    padding-left: 25px;
}

.dropdown-menu a::after {
    display: none;
}

/* 主视觉区域 */
.hero {
    height: 100vh;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: white;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 50%, #1e40af 100%);
    z-index: -1;
}

#particles-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.hero-content {
    max-width: 800px;
    padding: 0 20px;
    z-index: 1;
}

.hero-title {
    font-size: 4rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: linear-gradient(45deg, #ffffff, #fbbf24);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: fadeInUp 1s ease-out;
}

.hero-subtitle {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    opacity: 0.9;
    animation: fadeInUp 1s ease-out 0.2s both;
}

.hero-description {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    opacity: 0.8;
    animation: fadeInUp 1s ease-out 0.4s both;
}

.cta-button {
    background: linear-gradient(45deg, #d97706, #f59e0b);
    color: white;
    border: none;
    padding: 15px 40px;
    font-size: 1.1rem;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 600;
    animation: fadeInUp 1s ease-out 0.6s both;
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(217, 119, 6, 0.4);
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
}

.scroll-arrow {
    width: 30px;
    height: 30px;
    border: 2px solid white;
    border-top: none;
    border-left: none;
    transform: rotate(45deg);
}

/* 核心业务展示区 */
.services {
    padding: 100px 0;
    background: #f8fafc;
}

.section-title {
    font-size: 3rem;
    text-align: center;
    margin-bottom: 1rem;
    color: #1e3a8a;
    font-weight: 700;
}

.section-subtitle {
    text-align: center;
    font-size: 1.2rem;
    color: #64748b;
    margin-bottom: 4rem;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.service-card {
    background: white;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    position: relative;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.15);
}

.service-images {
    position: relative;
    height: 250px;
    overflow: hidden;
}

.service-img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0;
    transition: opacity 0.5s ease;
}

.service-img.active {
    opacity: 1;
}

.service-content {
    padding: 30px;
}

.service-content h3 {
    font-size: 1.5rem;
    color: #1e3a8a;
    margin-bottom: 15px;
    font-weight: 600;
}

.service-content p {
    color: #64748b;
    margin-bottom: 20px;
    line-height: 1.6;
}

.service-features {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.service-features span {
    background: linear-gradient(45deg, #1e3a8a, #3b82f6);
    color: white;
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
}

.service-link {
    display: inline-block;
    margin-top: 15px;
    color: #1e3a8a;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    transition: all 0.3s ease;
    position: relative;
}

.service-link:hover {
    color: #d97706;
    transform: translateX(5px);
}

.service-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -2px;
    left: 0;
    background: #d97706;
    transition: width 0.3s ease;
}

.service-link:hover::after {
    width: 100%;
}

.image-dots {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    cursor: pointer;
    transition: all 0.3s ease;
}

.dot.active {
    background: white;
    transform: scale(1.2);
}

/* 公司优势展示区 */
.advantages {
    padding: 100px 0;
    background: white;
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.advantage-card {
    text-align: center;
    padding: 40px 20px;
    border-radius: 20px;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.advantage-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    transition: left 0.5s;
}

.advantage-card:hover::before {
    left: 100%;
}

.advantage-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
}

.advantage-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.advantage-card h3 {
    font-size: 1.3rem;
    color: #1e3a8a;
    margin-bottom: 15px;
    font-weight: 600;
}

.advantage-card p {
    color: #64748b;
    line-height: 1.6;
}

/* 数据统计区 */
.stats {
    padding: 80px 0;
    background: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 100%);
    color: white;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
}

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

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 10px;
    background: linear-gradient(45deg, #ffffff, #fbbf24);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* 关于我们 */
.about {
    padding: 100px 0;
    background: #f8fafc;
}

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

.about-text h2 {
    font-size: 2.5rem;
    color: #1e3a8a;
    margin-bottom: 30px;
    font-weight: 700;
}

.about-text p {
    color: #64748b;
    margin-bottom: 20px;
    line-height: 1.8;
    font-size: 1.1rem;
}

.about-features {
    margin-top: 30px;
}

.feature-item {
    display: flex;
    align-items: center;
    margin-bottom: 15px;
}

.feature-icon {
    color: #10b981;
    font-weight: bold;
    margin-right: 15px;
    font-size: 1.2rem;
}

.about-images {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.about-img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 15px;
    transition: transform 0.3s ease;
}

.about-img:hover {
    transform: scale(1.05);
}

.about-img:first-child {
    grid-column: 1 / -1;
    height: 250px;
}

/* 新闻动态 */
.news {
    padding: 100px 0;
    background: white;
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.news-item {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.news-item a {
    text-decoration: none;
    color: inherit;
    display: block;
}

.news-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

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

.news-content {
    padding: 25px;
}

.news-date {
    color: #d97706;
    font-size: 0.9rem;
    font-weight: 500;
}

.news-content h3 {
    color: #1e3a8a;
    font-size: 1.3rem;
    margin: 10px 0;
    font-weight: 600;
}

.news-content p {
    color: #64748b;
    line-height: 1.6;
}

/* 联系我们 */
.contact {
    padding: 100px 0;
    background: #f8fafc;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    margin-top: 50px;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: 30px;
}

.contact-icon {
    font-size: 2rem;
    margin-right: 20px;
    margin-top: 5px;
}

.contact-details h4 {
    color: #1e3a8a;
    font-size: 1.2rem;
    margin-bottom: 10px;
    font-weight: 600;
}

.contact-details p {
    color: #64748b;
    line-height: 1.6;
}

.contact-form {
    background: white;
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.contact-form h3 {
    color: #1e3a8a;
    font-size: 1.5rem;
    margin-bottom: 30px;
    font-weight: 600;
}

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

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 15px;
    border: 2px solid #e2e8f0;
    border-radius: 10px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
    font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #1e3a8a;
}

.submit-btn {
    background: linear-gradient(45deg, #1e3a8a, #3b82f6);
    color: white;
    border: none;
    padding: 15px 40px;
    border-radius: 10px;
    font-size: 1.1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 600;
    width: 100%;
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(30, 58, 138, 0.3);
}

/* 底部信息 */
.footer {
    background: #1e293b;
    color: white;
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: 20px;
    color: #fbbf24;
}

.footer-section p,
.footer-section li {
    color: #cbd5e1;
    line-height: 1.6;
    margin-bottom: 10px;
}

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

.footer-section a {
    color: #cbd5e1;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: #fbbf24;
}

.social-links {
    display: flex;
    gap: 15px;
    margin-top: 20px;
}

.social-link {
    background: #334155;
    padding: 10px 15px;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.social-link:hover {
    background: #fbbf24;
    color: #1e293b !important;
}

.footer-bottom {
    border-top: 1px solid #334155;
    padding-top: 20px;
    text-align: center;
    color: #94a3b8;
}

/* 动画效果 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    40% {
        transform: translateX(-50%) translateY(-10px);
    }
    60% {
        transform: translateX(-50%) translateY(-5px);
    }
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: rgba(255, 255, 255, 0.95);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 20px 0;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-contact {
        display: none;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.2rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .advantages-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .container {
        padding: 0 15px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .services-grid,
    .news-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f5f9;
}

::-webkit-scrollbar-thumb {
    background: #1e3a8a;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #1e40af;
}