/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Arial', sans-serif;
    line-height: 1.6;
    color: #FFFFFF;
    background-color: #111827;
}

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

/* 导航栏 */
.header {
    background-color: #111827;
    border-bottom: 1px solid #10B981;
    padding: 20px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo h1 {
    font-size: 24px;
    font-weight: bold;
    color: #10B981;
}

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

.nav ul li {
    margin-left: 30px;
}

.nav ul li a {
    color: #FFFFFF;
    text-decoration: none;
    font-size: 16px;
    transition: all 0.3s ease;
    position: relative;
}

.nav ul li a:hover,
.nav ul li a.active {
    color: #10B981;
}

.nav ul li a.active::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: #10B981;
}

/* 主内容区 */
.main {
    display: flex;
    min-height: calc(100vh - 80px);
}

/* 左侧导航 */
.sidebar {
    width: 250px;
    background-color: #1F2937;
    padding: 30px;
    position: sticky;
    top: 80px;
    height: calc(100vh - 80px);
    border-right: 1px solid #10B981;
}

.side-nav ul {
    list-style: none;
}

.side-nav ul li {
    margin-bottom: 20px;
}

.side-nav ul li a {
    display: block;
    color: #FFFFFF;
    text-decoration: none;
    font-size: 16px;
    padding: 12px 15px;
    border-radius: 5px;
    transition: all 0.3s ease;
    border-left: 3px solid transparent;
}

.side-nav ul li a:hover {
    background-color: #10B981;
    border-left-color: #FFFFFF;
    transform: translateX(5px);
}

/* 右侧内容区 */
.content {
    flex: 1;
    padding: 40px;
}

/* Banner */
.banner {
    background-color: #10B981;
    color: #111827;
    padding: 60px;
    border-radius: 10px;
    margin-bottom: 40px;
    text-align: center;
}

.banner h2 {
    font-size: 36px;
    margin-bottom: 20px;
}

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

/* 区块 */
.section {
    background-color: #1F2937;
    padding: 40px;
    border-radius: 10px;
    margin-bottom: 30px;
    border: 1px solid #374151;
}

.section h3 {
    font-size: 24px;
    margin-bottom: 30px;
    color: #10B981;
    border-bottom: 1px solid #374151;
    padding-bottom: 15px;
}

/* 流程步骤 */
.process-steps {
    display: flex;
    justify-content: space-between;
    gap: 30px;
}

.step {
    flex: 1;
    text-align: center;
    padding: 30px;
    background-color: #374151;
    border-radius: 10px;
    transition: all 0.3s ease;
}

.step:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px rgba(16, 185, 129, 0.3);
}

.step-icon {
    width: 80px;
    height: 80px;
    background-color: #10B981;
    color: #111827;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    margin: 0 auto 20px;
    transition: all 0.3s ease;
}

.step:hover .step-icon {
    transform: rotate(360deg);
}

.step h4 {
    font-size: 18px;
    margin-bottom: 15px;
}

.step p {
    font-size: 14px;
    opacity: 0.8;
}

/* 技术网格 */
.tech-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.tech-item {
    text-align: center;
    padding: 30px;
    background-color: #374151;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
    border: 1px solid #4B5563;
}

.tech-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px rgba(16, 185, 129, 0.3);
    border-color: #10B981;
}

.tech-icon {
    width: 80px;
    height: 80px;
    background-color: #111827;
    color: #10B981;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: bold;
    margin: 0 auto 20px;
    border: 1px solid #10B981;
}

.tech-item h4 {
    font-size: 18px;
    margin-bottom: 10px;
}

.tech-item p {
    font-size: 14px;
    opacity: 0.8;
}

/* 案例内容 */
.case-tab {
    display: none;
}

.case-tab.active {
    display: block;
}

.case-tab h4 {
    font-size: 20px;
    margin-bottom: 20px;
    color: #10B981;
}

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

.case-item {
    background-color: #374151;
    border-radius: 10px;
    overflow: hidden;
    transition: all 0.3s ease;
    border: 1px solid #4B5563;
}

.case-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px rgba(16, 185, 129, 0.3);
    border-color: #10B981;
}

.case-image {
    height: 200px;
    background-color: #4B5563;
    display: flex;
    align-items: center;
    justify-content: center;
}

.case-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.case-item h5 {
    padding: 20px;
    font-size: 16px;
    color: #10B981;
}

.case-item p {
    padding: 0 20px 20px;
    font-size: 14px;
    opacity: 0.8;
}

/* 售后维护 */
.maintenance-content p {
    margin-bottom: 30px;
    opacity: 0.8;
}

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

.service-item {
    padding: 30px;
    background-color: #374151;
    border-radius: 10px;
    transition: all 0.3s ease;
    border: 1px solid #4B5563;
}

.service-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px rgba(16, 185, 129, 0.3);
    border-color: #10B981;
}

.service-item h4 {
    font-size: 18px;
    margin-bottom: 15px;
    color: #10B981;
}

.service-item p {
    font-size: 14px;
    opacity: 0.8;
    margin-bottom: 0;
}

/* 页脚 */
.footer {
    background-color: #111827;
    border-top: 1px solid #10B981;
    color: #FFFFFF;
    padding: 40px 0;
    margin-top: 60px;
}

.footer .container {
    display: flex;
    justify-content: space-between;
}

.footer-info h3 {
    font-size: 20px;
    margin-bottom: 20px;
    color: #10B981;
}

.footer-info p {
    margin-bottom: 10px;
    opacity: 0.8;
}

.footer-links ul {
    list-style: none;
    display: flex;
    gap: 30px;
}

.footer-links ul li a {
    color: #FFFFFF;
    text-decoration: none;
    opacity: 0.8;
    transition: opacity 0.3s ease;
}

.footer-links ul li a:hover {
    opacity: 1;
    color: #10B981;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    margin-top: 30px;
    border-top: 1px solid #374151;
    opacity: 0.7;
}

/* 响应式设计 */
@media (max-width: 1200px) {
    .container {
        width: 95%;
    }
    
    .main {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
        position: static;
        height: auto;
        margin-bottom: 30px;
    }
    
    .side-nav ul {
        display: flex;
        flex-wrap: wrap;
        gap: 10px;
    }
    
    .side-nav ul li {
        margin-bottom: 0;
    }
    
    .process-steps {
        flex-direction: column;
    }
    
    .tech-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .case-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .maintenance-services {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .header .container {
        flex-direction: column;
        gap: 15px;
    }
    
    .nav ul {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .nav ul li {
        margin: 0 10px;
    }
    
    .banner {
        padding: 40px;
    }
    
    .banner h2 {
        font-size: 28px;
    }
    
    .section {
        padding: 30px;
    }
    
    .tech-grid {
        grid-template-columns: 1fr;
    }
    
    .case-grid {
        grid-template-columns: 1fr;
    }
    
    .footer .container {
        flex-direction: column;
        gap: 30px;
    }
    
    .footer-links ul {
        flex-direction: column;
        gap: 10px;
    }
}