:root {
    --primary-color: #1a5f7a;
    --secondary-color: #57c5b6;
    --accent-color: #ff6b35;
    --dark-color: #002b5b;
    --light-color: #f8f9fa;
    --gray-color: #6c757d;
    --light-gray: #e9ecef;
    --success-color: #28a745;
    --warning-color: #ffc107;
    --danger-color: #dc3545;
}

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

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

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

/* 顶部导航 */
.header {
    background-color: rgba(255, 255, 255, 0.95);
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
    position: relative;
}

.logo {
    display: flex;
    align-items: center;
}

.logo-icon {
    color: var(--primary-color);
    font-size: 32px;
    margin-right: 10px;
}

.logo-text {
    font-size: 26px;
    font-weight: 700;
    color: var(--dark-color);
    font-family: 'AlibabaPuHuiTi-2-85-Bold', sans-serif;
}

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

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

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

.nav-links a {
    text-decoration: none;
    color: var(--dark-color);
    font-weight: 500;
    font-size: 16px;
    transition: color 0.3s;
    position: relative;
    padding: 5px 0;
}

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

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

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

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

.dropdown-content {
    position: absolute;
    top: 100%;
    left: 0;
    background-color: white;
    min-width: 200px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
    border-radius: 8px;
    padding: 10px 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all 0.3s ease;
    z-index: 1001;
}

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

.dropdown-content a {
    display: block;
    padding: 10px 20px;
    color: var(--dark-color);
    text-decoration: none;
    transition: all 0.2s;
    border-left: 3px solid transparent;
}

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

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    color: var(--dark-color);
    cursor: pointer;
}

/* 首页横幅 */
.hero {
    background: linear-gradient(rgba(0, 43, 91, 0.88), rgba(0, 43, 91, 0.92)), url('https://images.unsplash.com/photo-1518837695005-2083093ee35b?ixlib=rb-4.0.3&auto=format&fit=crop&w=1350&q=80');
    background-size: cover;
    background-position: center;
    color: white;
    padding: 180px 0 100px;
    text-align: center;
    margin-top: 70px;
}

.hero h1 {
    font-size: 48px;
    margin-bottom: 20px;
    line-height: 1.2;
    font-weight: 700;
}

.hero p {
    font-size: 20px;
    max-width: 800px;
    margin: 0 auto 40px;
    color: rgba(255, 255, 255, 0.9);
}

.tagline {
    display: inline-block;
    background-color: rgba(255, 107, 53, 0.2);
    color: #ffd8c9;
    padding: 8px 20px;
    border-radius: 30px;
    font-size: 18px;
    margin-bottom: 30px;
    border: 1px solid rgba(255, 107, 53, 0.4);
}

.btn {
    display: inline-block;
    padding: 14px 32px;
    background-color: var(--accent-color);
    color: white;
    border-radius: 4px;
    text-decoration: none;
    font-weight: 600;
    font-size: 16px;
    transition: all 0.3s;
    border: none;
    cursor: pointer;
}

.btn:hover {
    background-color: #e55a2b;
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.15);
}

.btn-outline {
    background-color: transparent;
    border: 2px solid white;
    margin-left: 15px;
}

.btn-outline:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

/* 产品概览 */
.section {
    padding: 100px 0;
}

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

.section-title h2 {
    font-size: 36px;
    color: var(--dark-color);
    margin-bottom: 15px;
    position: relative;
    display: inline-block;
}

.section-title h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background-color: var(--accent-color);
}
        
.section-title p {
    color: var(--gray-color);
    max-width: 700px;
    margin: 20px auto 0;
    font-size: 18px;
}

/* 产品展示 - 单行布局 */
.products-showcase {
    background-color: var(--light-color);
}

.product-row {
    margin-bottom: 80px;
}

.product-row:last-child {
    margin-bottom: 0;
}






.carousel-slides {
    display: flex;
    width: 100%;
    height: 100%;
    transition: transform 0.5s ease-in-out;
}

.carousel-slide {
    flex: 0 0 100%;
    height: 100%;
    position: relative;
}

.carousel-slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}



/* 轮播控制按钮 */
.carousel-controls {
    position: absolute;
    bottom: 15px;
    left: 0;
    width: 100%;
    display: flex;
    justify-content: center;
    z-index: 3;
}

.carousel-dots {
    display: flex;
    gap: 8px;
    background-color: rgba(0, 0, 0, 0.4);
    padding: 6px 12px;
    border-radius: 20px;
}

.carousel-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.5);
    cursor: pointer;
    transition: background-color 0.3s, transform 0.3s;
}

.carousel-dot.active {
    background-color: #fff;
    transform: scale(1.2);
}

/* 轮播导航箭头 */
.carousel-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 100%;
    display: flex;
    justify-content: space-between;
    padding: 0 15px;
    z-index: 3;
    opacity: 0;
    transition: opacity 0.3s;
}

.product-img:hover .carousel-nav {
    opacity: 1;
}

.carousel-nav-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: rgba(0, 0, 0, 0.5);
    border: none;
    color: white;
    font-size: 20px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.3s;
}

.carousel-nav-btn:hover {
    background-color: rgba(0, 0, 0, 0.7);
}




/* 轮播指示器 */
.carousel-indicator {
    position: absolute;
    top: 15px;
    right: 15px;
    background-color: rgba(0, 0, 0, 0.6);
    color: white;
    padding: 4px 10px;
    border-radius: 15px;
    font-size: 12px;
    z-index: 3;
}

/* 解决方案 */
.solutions {
    background-color: #f0f4f8;
}

.scenario-tabs {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 40px;
    gap: 10px;
}

.scenario-tab {
    padding: 12px 25px;
    background-color: white;
    border: none;
    border-radius: 30px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.05);
}

.scenario-tab:hover {
    background-color: var(--light-color);
    transform: translateY(-2px);
}

.scenario-tab.active {
    background-color: var(--primary-color);
    color: white;
}

.scenario-content {
    display: none;
    background-color: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}

.scenario-content.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.scenario-header {
    padding: 30px 30px 20px;
    background-color: var(--light-color);
    border-bottom: 1px solid #eee;
}

.scenario-header h3 {
    font-size: 28px;
    color: var(--dark-color);
    margin-bottom: 10px;
}

.scenario-body {
    padding: 30px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

@media (max-width: 768px) {
    .scenario-body {
        grid-template-columns: 1fr;
    }
}

.scenario-features ul {
    list-style: none;
}

.scenario-features li {
    margin-bottom: 12px;
    display: flex;
    align-items: flex-start;
}

.scenario-features i {
    color: var(--secondary-color);
    margin-right: 10px;
    margin-top: 3px;
    flex-shrink: 0;
}

.scenario-img {
    height: 300px;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

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

/* 核心技术 */
.tech-showcase {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.tech-card {
    text-align: center;
    padding: 40px 25px;
    background-color: white;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    transition: all 0.3s;
    border-top: 4px solid transparent;
}

.tech-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
    border-top-color: var(--accent-color);
}

.tech-icon {
    font-size: 50px;
    color: var(--primary-color);
    margin-bottom: 20px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.tech-card h3 {
    font-size: 22px;
    margin-bottom: 15px;
    color: var(--dark-color);
}

/* 合作伙伴 */
.partners {
    background-color: var(--light-color);
}

.partner-logos {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 40px;
    margin-top: 40px;
}

.partner-logo {
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    filter: grayscale(100%);
    opacity: 0.7;
    transition: all 0.3s;
}

.partner-logo:hover {
    filter: grayscale(0);
    opacity: 1;
}

.partner-logo img {
    max-height: 100%;
    max-width: 150px;
}

/* 页脚 */
.footer {
    background-color: var(--dark-color);
    color: white;
    padding: 70px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 50px;
}

.footer-column h3 {
    font-size: 20px;
    margin-bottom: 25px;
    position: relative;
    padding-bottom: 10px;
}

.footer-column h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 2px;
    background-color: var(--accent-color);
}

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

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

.footer-links a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: color 0.3s;
}

.footer-links a:hover {
    color: var(--accent-color);
}

.contact-info {
    list-style: none;
}

.contact-info li {
    margin-bottom: 15px;
    display: flex;
    align-items: flex-start;
}

.contact-info i {
    margin-right: 10px;
    color: var(--accent-color);
    margin-top: 5px;
    flex-shrink: 0;
}

.copyright {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .hero h1 {
        font-size: 40px;
    }
    
    .section-title h2 {
        font-size: 32px;
    }
    
    .scenario-tabs {
        flex-direction: column;
        align-items: center;
    }
    
    .scenario-tab {
        width: 100%;
        max-width: 300px;
    }
    
    .dropdown-content {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        background-color: transparent;
        padding: 10px 0 10px 20px;
        display: none;
    }
    
    .dropdown.active .dropdown-content {
        display: block;
    }
    
    .dropdown-content a {
        padding: 8px 0;
        border-left: none;
        border-bottom: 1px solid rgba(0,0,0,0.05);
    }
    
    .dropdown-content a:hover {
        padding-left: 10px;
        border-left: none;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background-color: white;
        flex-direction: column;
        padding: 20px;
        box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
        z-index: 1001;
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .nav-links li {
        margin: 10px 0;
        width: 100%;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .hero {
        padding: 150px 0 80px;
    }
    
    .hero h1 {
        font-size: 34px;
    }
    
    .hero p {
        font-size: 18px;
    }
    
    .section {
        padding: 80px 0;
    }
    
    .btn-outline {
        margin-left: 0;
        margin-top: 15px;
    }
    
    .product-img {
        height: 250px;
        display: flex;
        align-items: center;
    }
}

@media (max-width: 576px) {
    .hero h1 {
        font-size: 28px;
    }
    
    .section-title h2 {
        font-size: 28px;
    }
    
    .product-card {
        flex-direction: column;
    }
}