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

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #fff;
}

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

/* 通用样式 */
.section {
    padding: 80px 0;
}

.section.bg-gray {
    background-color: #f8f9fa;
}

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

.section-title h2 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 15px;
    color: #2c3e50;
}

.section-title p {
    font-size: 16px;
    color: #666;
    max-width: 600px;
    margin: 0 auto;
}

.btn {
    display: inline-block;
    padding: 12px 32px;
    font-size: 16px;
    font-weight: 500;
    text-decoration: none;
    border-radius: 5px;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(102, 126, 234, 0.3);
}

.btn-block {
    display: block;
    width: 100%;
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background-color: transparent;
    transition: all 0.3s ease;
}

.navbar.scrolled {
    background-color: rgba(255, 255, 255, 0.98);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
}

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

.logo h1 {
    font-size: 24px;
    font-weight: 700;
    color: #fff;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.navbar.scrolled .logo h1 {
    color: #2c3e50;
}

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

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

.navbar.scrolled .nav-menu a {
    color: #333;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: #667eea;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    transition: width 0.3s ease;
}

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

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
}

.mobile-menu-btn span {
    width: 25px;
    height: 3px;
    background-color: #fff;
    transition: all 0.3s ease;
}

.navbar.scrolled .mobile-menu-btn span {
    background-color: #333;
}

/* 首页横幅 */
.banner {
    height: 100vh;
    min-height: 600px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: #fff;
    position: relative;
    overflow: hidden;
}

.banner::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='%23ffffff' 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");
}

.banner-content {
    position: relative;
    z-index: 1;
}

.banner-content h1 {
    font-size: 56px;
    font-weight: 700;
    margin-bottom: 20px;
    animation: fadeInUp 0.8s ease;
}

.banner-content p {
    font-size: 20px;
    margin-bottom: 40px;
    opacity: 0.9;
    animation: fadeInUp 0.8s ease 0.2s both;
}

.banner-content .btn {
    animation: fadeInUp 0.8s ease 0.4s both;
    background: #fff;
    color: #667eea;
    font-weight: 600;
}

.banner-content .btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
}

/* 关于我们 */
.about-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: 40px;
}

.about-text h3 {
    font-size: 24px;
    color: #2c3e50;
    margin-bottom: 15px;
}

.about-text p {
    color: #666;
    margin-bottom: 30px;
    font-size: 16px;
}

.stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 40px;
}

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

.stat-item .number {
    display: block;
    font-size: 42px;
    font-weight: 700;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-item .label {
    display: block;
    color: #666;
    font-size: 14px;
    margin-top: 5px;
}

/* 服务项目 */
.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.service-card {
    background: #fff;
    padding: 40px 30px;
    border-radius: 10px;
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(102, 126, 234, 0.15);
}

.service-icon {
    font-size: 50px;
    margin-bottom: 20px;
}

.service-card h3 {
    font-size: 20px;
    color: #2c3e50;
    margin-bottom: 15px;
}

.service-card p {
    color: #666;
    font-size: 14px;
}

/* 成功案例 */
.cases-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 25px;
}

.case-card {
    background: #fff;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.case-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.case-image {
    height: 150px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 60px;
    color: #fff;
}

.case-card h3 {
    padding: 20px 20px 10px;
    font-size: 18px;
    color: #2c3e50;
}

.case-card p {
    padding: 0 20px 25px;
    color: #666;
    font-size: 14px;
}

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

.news-card {
    background: #fff;
    border-radius: 10px;
    padding: 30px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.news-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.news-date {
    font-size: 13px;
    color: #667eea;
    font-weight: 500;
    margin-bottom: 15px;
}

.news-card h3 {
    font-size: 18px;
    color: #2c3e50;
    margin-bottom: 15px;
    line-height: 1.4;
}

.news-card p {
    color: #666;
    font-size: 14px;
    margin-bottom: 20px;
}

.read-more {
    color: #667eea;
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: color 0.3s ease;
}

.read-more:hover {
    color: #764ba2;
}

/* 联系我们 */
.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.contact-item {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.contact-icon {
    font-size: 30px;
    flex-shrink: 0;
}

.contact-item h4 {
    font-size: 18px;
    color: #2c3e50;
    margin-bottom: 8px;
}

.contact-item p {
    color: #666;
}

.contact-form {
    background: #fff;
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #333;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #e9ecef;
    border-radius: 5px;
    font-size: 14px;
    font-family: inherit;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #667eea;
}

/* 页脚 */
.footer {
    background: #2c3e50;
    color: #fff;
    padding: 60px 0 20px;
}

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

.footer-section h3 {
    font-size: 22px;
    margin-bottom: 20px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-section h4 {
    font-size: 16px;
    margin-bottom: 20px;
    color: #fff;
}

.footer-section p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
    line-height: 1.8;
    margin-bottom: 10px;
}

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

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

.footer-section ul li a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s ease;
}

.footer-section ul li a:hover {
    color: #667eea;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
    font-size: 13px;
}

.footer-bottom a {
    color: rgba(255, 255, 255, 0.6);
    text-decoration: none;
}

.footer-bottom a:hover {
    color: #667eea;
}

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

/* 响应式设计 */
@media (max-width: 992px) {
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .cases-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .news-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .contact-wrapper {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .mobile-menu-btn {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 0;
        left: -100%;
        width: 80%;
        height: 100vh;
        background: #2c3e50;
        flex-direction: column;
        padding: 80px 40px;
        transition: left 0.3s ease;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-menu a {
        color: #fff !important;
        font-size: 18px;
    }
    
    .banner-content h1 {
        font-size: 36px;
    }
    
    .banner-content p {
        font-size: 16px;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .cases-grid {
        grid-template-columns: 1fr;
    }
    
    .news-grid {
        grid-template-columns: 1fr;
    }
    
    .stats {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .section-title h2 {
        font-size: 28px;
    }
    
    .section {
        padding: 50px 0;
    }
}

@media (max-width: 480px) {
    .banner-content h1 {
        font-size: 28px;
    }
    
    .contact-form {
        padding: 25px;
    }
}