/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', 'Microsoft YaHei', 'PingFang SC', Arial, sans-serif;
}

:root {
    /* 主色调 */
    --primary-color: #2563eb;
    --secondary-color: #1d4ed8;
    --accent-color: #3b82f6;
    --light-color: #eff6ff;
    --accent-blue: #3498db; 
    --cyber-blue: #00b4d8;
    
    /* 中性色 */
    --dark-color: #1e293b;
    --medium-color: #475569;
    --light-gray: #f8fafc;
    --border-color: #e2e8f0;
    --gray-blue: #7b8fa1;
    
    /* 产品特色色 */
    --product-primary: #0ea5e9;
    --product-secondary: #0284c7;
    
    /* 效果 */
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04); 
}

html {
    scroll-behavior: smooth;
}

body {
    background: linear-gradient(135deg, #f8fafc 0%, #f0f8ff 100%);
    color: var(--dark-color);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

section {
    padding: 40px 0;
}

.section-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 20px;
    color: var(--dark-color);
    position: relative;
    font-weight: 700;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background-color: var(--primary-color);
    border-radius: 2px;
}

.section-subtitle {
    text-align: center;
    color: var(--medium-color);
    font-size: 1.2rem;
    max-width: 780px;
    margin: 0 auto 20px;
}

.btn {
    display: inline-block;
    padding: 14px 32px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    text-align: center;
}

.btn:hover {
    background-color: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background-color: transparent;
    border: 2px solid var(--border-color);
    color: var(--light-color);
}

.btn-secondary:hover {
    background-color: var(--primary-color);
    color: white;
}

.btn-product {
    background-color: var(--primary-color);
}

.btn-product:hover {
    background-color: var(--secondary-color);
}

/* 头部导航 */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.98);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    transition: var(--transition);
}

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

.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
}

.logo-icon {
    width: 40px;
    height: 60px;  
    display: flex;
    align-items: center;
    justify-content: center; 
    margin-right: 10px; 
}
.logo-icon img{
    width:40px;
    height:40px;
}
.logo-text {
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--dark-color);
}

.logo-text span {
    color: var(--primary-color);
}

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

.nav-menu li {
    margin-left: 30px;
    position: relative;
}

.nav-menu a {
    text-decoration: none;
    color: var(--dark-color); 
    font-size: 1.2rem;
    transition: var(--transition);
    position: relative;
}

.nav-menu a:hover {
    color: var(--primary-color);
}

.nav-menu a.active {
    color: var(--primary-color);
}

.nav-menu a.active::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--primary-color);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--primary-color);
    cursor: pointer;
}

/* 下拉菜单箭头 */
.has-dropdown > a::after {
    content: '\f078';
    font-family: 'Font Awesome 5 Free';
    font-weight: 900;
    margin-left: 8px;
    font-size: 0.8rem;
    transition: var(--transition);
}

/* 下拉菜单样式 */
.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0px;
    width: 500px;
    background-color: white;
    border-radius: 8px;
    box-shadow: var(--shadow-xl);
    padding: 15px 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: var(--transition);
    z-index: 1001;
}

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

.dropdown-menu a {
    display: flex;
    align-items: center;
    padding: 12px 20px;
    color: var(--dark-color);
    text-decoration: none;
    transition: var(--transition);
}

.dropdown-menu a:hover {
    background-color: var(--light-gray);
    color: var(--primary-color);
    padding-left: 25px;
}

.dropdown-menu i {
    width: 20px;
    margin-right: 12px;
    color: var(--primary-color);
    font-size: 0.8rem;
}

.dropdown-menu .dropdown-title {
    padding: 8px 20px;
    font-weight: 700;
    color: var(--dark-color);
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 10px;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--primary-color);
    cursor: pointer;
}



/* 英雄区域 - 突出产品 */
.hero {
    background: linear-gradient(135deg, rgba(10, 42, 90, 0.9) 0%, rgba(26, 91, 158, 0.85) 100%), url('https://images.unsplash.com/photo-1451187580459-43490279c0fa?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=1920&q=80');
    background-size: cover;
    background-position: center;
    color: white;
    padding: 300px 0 180px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 20% 50%, rgba(0, 180, 216, 0.3) 0%, transparent 50%),
                radial-gradient(circle at 80% 20%, rgba(52, 152, 219, 0.2) 0%, transparent 50%);
}

.hero-content {
    max-width: 900px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.hero h1 {
    font-size: 2.2rem;
    margin-bottom: 10px;
    line-height: 1.2;
    font-weight: 800;
    letter-spacing: -0.5px;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2); 
}

.hero p {
    font-size: 1.3rem;
    margin-bottom: 40px;
    opacity: 0.95;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.8;
}

.hero-btns {
    display: flex;
    justify-content: center;
    gap: 25px;
    margin-top: 50px;
    flex-wrap: wrap;
}

.product-badge {
    display: inline-block;
    background-color: var(--product-primary);
    color: white;
    padding: 8px 20px;
    border-radius: 30px;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 20px;
    letter-spacing: 0.5px;
}

/* 产品展示区域 */
.product-showcase {
    background-color: var(--light-gray);
}

.product-content {
    display: flex;
    align-items: center;
    gap: 20px;
}

.product-image {
    flex: 5.5;
    border-radius: 12px;
    overflow: hidden;  
}

.product-image-placeholder {
    width: 100%;
    height: 405px;
    background: linear-gradient(135deg, var(--light-color), #dbeafe);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    font-size: 4rem;
}
.product-image img{
    width:100%;
    height:100%;  
}
.product-info {
    flex: 4.5; 
}

.product-info h2 {
    font-size: 2.2rem;
    margin-bottom: 20px;
    margin-top:20px;
    color: var(--dark-color);
}

.product-info h2 span {
    color: var(--primary-color);
}

.product-info p {
    color: var(--medium-color);
    margin-bottom: 25px;
    line-height: 1.7;
}

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

.product-features li {
    display: flex;
    align-items: center;
    margin-bottom: 15px;
    color: var(--medium-color);
}

.product-features i {
    color: var(--product-primary);
    margin-right: 10px;
    font-size: 1.1rem;
}

/* 产品功能区域 */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.feature-card {
    background-color: white;
    border-radius: 10px;
    padding: 40px 30px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    text-align: center;
    border-top: 4px solid var(--primary-color); 
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.feature-icon {
    width: 70px;
    height: 70px;
    background-color: #e0f2fe;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
    color: var(--primary-color);
    font-size: 1.8rem;
}

.feature-card h3 {
    font-size: 1.4rem;
    margin-bottom: 15px;
    color: var(--dark-color);
}

.feature-card p {
    color: var(--medium-color);
    line-height: 1.6;
}

/* 服务区域 */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 25px;
    margin-top: 30px;
}

.service-card {
    background-color: white;
    border-radius: 12px;
    padding: 25px 35px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    text-align: center;
    border: 1px solid rgba(203, 213, 225, 0.3);
    position: relative;
    overflow: hidden;
}

.service-card:hover {
    transform: translateY(-15px);
    box-shadow: var(--shadow-hover);
    border-color: var(--accent-blue);
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: linear-gradient(90deg, var(--primary-color), var(--cyber-blue));
}

.service-icon {
    width: 90px;
    height: 90px;
    background: linear-gradient(135deg, #e8f4fc, #d4e7fa);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 30px;
    color: var(--primary-color);
    font-size: 2.2rem;
    transition: var(--transition);
    box-shadow: 0 5px 15px rgba(26, 91, 158, 0.1);
}

.service-card:hover .service-icon {
    background: linear-gradient(135deg, var(--primary-color), var(--cyber-blue));
    color: white;
    transform: scale(1.1);
}

.service-card h3 {
    font-size: 1.6rem;
    margin-bottom: 20px;
    color: var(--dark-blue);
    font-weight: 700;
}

.service-card p {
    color: var(--gray-blue);
    line-height: 1.7;
    margin-bottom: 25px;
}

.service-link {
    display: inline-flex;
    align-items: center;
    color: var(--accent-blue);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    transition: var(--transition);
}

.service-link:hover {
    color: var(--primary-blue);
    gap: 8px;
}

/* 客户评价 */
.testimonials-slider {
    max-width: 800px;
    margin: 50px auto 0;
    position: relative;
    overflow: hidden;
}

.testimonial {
    background-color: white;
    border-radius: 12px;
    padding: 40px;
    box-shadow: var(--shadow);
    text-align: center;
    display: none;
}

.testimonial.active {
    display: block;
}

.testimonial-text {
    font-size: 1.2rem;
    color: var(--medium-color);
    line-height: 1.8;
    margin-bottom: 25px;
    font-style: italic;
}

.testimonial-author {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
}

.author-avatar {
    width: 50px;
    height: 50px;
    background-color: var(--light-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    font-size: 1.2rem;
}

.author-info h4 {
    font-size: 1.1rem;
    margin-bottom: 5px;
    color: var(--dark-color);
}

.author-info p {
    color: var(--medium-color);
    font-size: 0.9rem;
}

.testimonial-controls {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 30px;
}

.control-btn {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: var(--border-color);
    border: none;
    cursor: pointer;
    transition: var(--transition);
}

.control-btn.active {
    background-color: var(--product-primary);
    transform: scale(1.2);
}
 
/* 客户案例专栏 */
.case-studies {
    background-color: white;
}

.case-studies-content {
            display: grid; 
            grid-template-columns: repeat(4, 1fr); 
            gap: 30px 30px;
            padding: 20px;
            max-width: 1200px;
            margin-top: 50px;  
            overflow: hidden;  
            margin: 0 auto;
            padding: 30px 20px; 
}

.case-study-card {
    background-color: white;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition); 
            height: 130px; 
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center; 
            cursor: pointer; 
} 
.case-study-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.case-study-image {
    width: 100%;
    height: 90px;
    background: linear-gradient(15deg, var(--accent-color), var(--accent-blue));  
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgb(255, 253, 253);
    font-size:1.5rem;
    font-weight: normal;
}
.case-study-image img{
    width:100%;
    height:100%;
}
.case-study-info {
    padding: 3px 10px;
    white-space: nowrap;    
    overflow: hidden;     
    text-overflow: ellipsis;  
    width: 100%; 
}

.case-study-info h3 {
    font-size: 1.4rem;
    margin-bottom: 15px;
    color: var(--dark-color);
    font-weight: normal;    
    overflow: hidden;     
    text-overflow: ellipsis;  
    width: 100%; 
    text-align: center;
}

.case-study-info p {
    color: var(--medium-color);
    line-height: 1.6;
    margin-bottom: 20px;
}

.case-study-stats {
    display: flex;
    justify-content: space-between;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.case-study-stat {
    text-align: center;
    display:flex;
    flex:1;
    justify-content: space-between;
}

.case-study-stat .number {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--product-primary);
    margin-bottom: 5px;
}

.case-study-stat .label {
    color: var(--medium-color);
    font-size: 1.5rem;
}



/* 联系我们 */
.contact-content {
    display: flex;
    gap: 60px;
    margin-top: 50px;
}

.contact-info {
    flex: 1;
}

.contact-form {
    flex: 1;
    background-color: white;
    border-radius: 12px;
    padding: 40px;
    box-shadow: var(--shadow); 
    display: flex; 
    gap: 20px; 
    flex-wrap: wrap; 
    align-items: center;
}
.contact-form img{
    width: calc(50% - 10px); 
    height: auto;  
    object-fit: cover;  
}
.contact-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: 30px;
}

.contact-icon {
    width: 50px;
    height: 50px;
    background-color: #e0f2fe;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    font-size: 1.2rem;
    margin-right: 20px;
    flex-shrink: 0;
}

.contact-details h3 {
    font-size: 1.2rem;
    margin-bottom: 5px;
    color: var(--dark-color);
}

.contact-details p {
    color: var(--medium-color);
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--dark-color);
}
.form-group .must{
    color:#cc0000;
    font-weight: 600;
} 
.form-group .must::before{
    content:'*';
    color:#cc0000;  
    margin-right:5px;  
}
.form-control {
    width: 100%;
    padding: 14px 16px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 1rem;
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--product-primary);
    box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.1);
}

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

/* 页脚 */
footer {
    background-color: #0f172a;
    color: white;
    padding: 70px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); 
    margin-bottom: 20px;
    text-align: center;
}

.footer-column p {
    font-size: 1.2rem;
    margin-bottom: 25px;
    color: white;
}

.footer-links {
    list-style: none;
}

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

.footer-links a {
    color: #cbd5e1;
    text-decoration: none;
    transition: var(--transition);
}

.footer-links a:hover {
    color: white;
    padding-left: 5px;
}

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

.social-link {
    width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-decoration: none;
    transition: var(--transition);
}

.social-link:hover {
    background-color: var(--product-primary);
    transform: translateY(-5px);
}

.copyright {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: #94a3b8;
    font-size: 0.9rem;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: white;
        flex-direction: column;
        padding: 20px;
        box-shadow: 0 10px 15px rgba(0, 0, 0, 0.1);
        border-top: 1px solid var(--border-color);
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .nav-menu li {
        margin: 10px 0;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .product-content, .advantages-content, .contact-content {
        flex-direction: column;
    }
}

@media (max-width: 768px) {
    .hero {
        padding: 150px 0 80px;
    }
    
    .hero h1 {
        font-size: 2.2rem;
    }
    
    .hero p {
        font-size: 1.1rem;
    }
    
    .hero-btns {
        flex-direction: column;
        align-items: center;
        gap: 15px;
    }
    
    .btn {
        width: 100%;
        max-width: 250px;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 576px) {
    .container {
        padding: 0 15px;
    }
    
    section {
        padding: 60px 0;
    }
    
    .hero h1 {
        font-size: 1.8rem;
    }
    
    .hero p {
        font-size: 1rem;
    }
    
    .features-grid, .pricing-cards {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .contact-form {
        padding: 30px;
    }
}

/**添加图片滚动**/
.carousel-3d {
    width: 100%; 
    height: 390px;
    position: relative;
    perspective: 1000px; 
}

.carousel-stage {
    width: 100%;
    height: 100%;
    position: absolute;
    transform-style: preserve-3d;
    transition: transform 0.8s ease;
}

.carousel-item {
    position: absolute;
    width: 460px;
    height: 250px;
    top: 60px;
    left: 36%;
    margin-left: -140px;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 10px 20px rgba(0,0,0,0.5);
    transition: all 0.8s ease;
    cursor: pointer;
}
.carousel-item img{
    width:100%;
    height:100%;
}
/* 中间图片 */
.carousel-item.active {
    transform: translateZ(0) scale(1.1);
    box-shadow: 0 15px 30px rgba(0,0,0,0.7);
    z-index: 10;
}

/* 左右两侧图片 */
.carousel-item.left {
    transform: translateX(-280px) translateZ(-200px) rotateY(65deg) scale(0.6);
    filter: brightness(0.8);
    z-index: 5;
}

.carousel-item.right {
    transform: translateX(280px) translateZ(-200px) rotateY(-65deg) scale(0.6);
    filter: brightness(0.8);
    z-index: 5;
}

/* 更远的图片 */
.carousel-item.hidden {
    transform: translateX(-600px) translateZ(-400px) rotateY(35deg) scale(0.7);
    filter: brightness(0.5);
    opacity: 0.6;
    z-index: 1;
}

.carousel-item.hidden-right {
    transform: translateX(600px) translateZ(-400px) rotateY(-35deg) scale(0.7);
    filter: brightness(0.5);
    opacity: 0.6;
    z-index: 1;
}

.carousel-item img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.image-title {
    position: absolute;
    bottom: 0;
    width: 100%;
    padding: 15px;
    background: rgba(0,0,0,0.7);
    color: white;
    text-align: center;
    opacity: 0;
    transition: opacity 0.5s;
}

.carousel-item.active .image-title {
    opacity: 1;
}

.controls {
    display: flex;
    gap: 20px;
    margin-bottom: 30px;
}

.control-btn {
    padding: 12px 24px;
    background: #1976d2;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px; 
}

.control-btn:hover {
    background: #1565c0;
}

.auto-controls {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 30px; 
}

.indicators {
    display: flex;
    gap: 15px;
    margin-bottom: 30px;
    justify-content: center; 
}

.indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(121, 120, 120, 0.7);
    cursor: pointer; 
}

.indicator.active {
    background: #4fc3f7;
}

@media (max-width: 768px) {
    .carousel-3d { height: 350px; }
    .carousel-item {
        width: 220px;
        height: 220px;
        margin-left: -110px;
        top: 65px;
    }
    .carousel-item.left {
        transform: translateX(-250px) translateZ(-150px) rotateY(25deg) scale(0.9);
    }
    .carousel-item.right {
        transform: translateX(250px) translateZ(-150px) rotateY(-25deg) scale(0.9);
    }
}