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

html, body {
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Microsoft YaHei', 'PingFang SC', 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #2d3748;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    background-attachment: fixed;
    min-height: 100vh;
    position: relative;
}

/* 添加装饰性背景元素 */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 80%, rgba(44, 90, 160, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(30, 61, 114, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(44, 90, 160, 0.05) 0%, transparent 50%);
    pointer-events: none;
    z-index: -1;
}

.container {
    max-width: 100%;
    margin: 0;
    padding: 0;
    width: 100%;
    position: relative;
    z-index: 2;
}

/* 大屏幕优化 */
@media (min-width: 1400px) {
    .container {
        max-width: 100%;
        padding: 0;
    }
}

/* 超大屏幕优化 */
@media (min-width: 1800px) {
    .container {
        max-width: 100%;
        padding: 0;
    }
}

/* 导航栏样式 */
#navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(0, 0, 0, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
}

/* 滚动时的导航栏样式 - 保持相同外观 */
#navbar.scrolled {
    background: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(15px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 88px;
}

/* 大屏幕导航栏优化 */
@media (min-width: 1400px) {
    .nav-container {
        max-width: 1600px;
        padding: 0 60px;
    }
}

@media (min-width: 1800px) {
    .nav-container {
        max-width: 1800px;
        padding: 0 80px;
    }
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 20px;
    min-width: 350px;
}

.logo {
    height: 75px;
    width: auto;
}

.brand-name {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.brand-name .company-main {
    font-size: 30px;
    font-weight: 700;
    color: rgba(255, 255, 255, 0.9);
    line-height: 1.2;
    font-family: 'Microsoft YaHei', 'PingFang SC', sans-serif;
    letter-spacing: 0.3px;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

.brand-name .company-sub {
    font-size: 17px;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.2;
    font-family: 'Arial', 'Helvetica', sans-serif;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

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

.nav-item {
    position: relative;
}

.nav-link {
    text-decoration: none;
    color: rgba(255, 255, 255, 0.9);
    font-weight: 500;
    padding: 12px 0;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 5px;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

.nav-link:hover,
.nav-link.active {
    color: rgba(255, 255, 255, 1);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
}

.dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(102, 126, 234, 0.1);
    backdrop-filter: blur(15px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
    border-radius: 8px;
    min-width: 150px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s;
    z-index: 1001;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

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

.dropdown-item {
    display: block;
    padding: 12px 20px;
    color: #2d3748;
    text-decoration: none;
    transition: all 0.3s;
}

.dropdown-item:hover {
    background: rgba(59, 130, 246, 0.1);
    color: #2d3748;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

    .nav-toggle span {
        width: 25px;
        height: 3px;
        background: #ffffff;
    border: 1px solid rgba(102, 126, 234, 0.1);
    box-shadow: 0 8px 30px rgba(102, 126, 234, 0.15);
    border: 1px solid rgba(102, 126, 234, 0.1);
    box-shadow: 0 4px 20px rgba(102, 126, 234, 0.1);
        transition: all 0.3s;
    }

/* 移动端导航 */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 88px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 88px);
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        justify-content: flex-start;
        align-items: center;
        padding-top: 50px;
        transition: left 0.3s;
        border-top: 1px solid rgba(44, 90, 160, 0.1);
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-toggle span {
        background: #ffffff;
    border: 1px solid rgba(102, 126, 234, 0.1);
    box-shadow: 0 8px 30px rgba(102, 126, 234, 0.15);
    border: 1px solid rgba(102, 126, 234, 0.1);
    box-shadow: 0 4px 20px rgba(102, 126, 234, 0.1);
    }

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }

    .logo {
        height: 50px;
        width: auto;
    }

    .brand-name .company-sub {
        display: none;
    }

    .brand-name .company-main {
        font-size: 20px;
    }
}

/* 页面标题 */
.page-header {
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    color: #2d3748;
    padding: 120px 0 80px;
    text-align: center;
}

.page-header h1 {
    font-size: 3rem;
    margin-bottom: 10px;
    font-weight: 300;
}

.page-header p {
    font-size: 1.2rem;
    opacity: 0.9;
}

/* 轮播图样式 */
.hero-section {
    position: relative;
    height: 100vh;
    min-height: 600px;
    overflow: hidden;
    margin: 0;
    padding: 0;
}

.carousel-container {
    position: relative;
    height: 100%;
    width: 100%;
}

.carousel-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 1s ease-in-out;
}

.carousel-slide.active {
    opacity: 1;
}

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

.carousel-content {
    position: absolute;
    top: 50%;
    left: 10%;
    transform: translateY(-50%);
    text-align: left;
    color: #ffffff;
    z-index: 2;
    max-width: 60%;
}

.carousel-content h1 {
    font-size: 4.5rem;
    margin-bottom: 25px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.7);
    font-weight: 700;
    line-height: 1.2;
    color: #ffffff;
}

.carousel-content p {
    font-size: 1.5rem;
    margin-bottom: 35px;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.7);
    max-width: 500px;
    line-height: 1.4;
    color: #ffffff;
}

.cta-button {
    background: linear-gradient(135deg, #3b82f6 0%, #1e40af 100%);
    color: #ffffff;
    border: none;
    padding: 18px 40px;
    font-size: 1.2rem;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    text-decoration: none;
    display: inline-block;
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.3);
}

/* 确保链接形式的CTA按钮样式正确 */
.cta-button:visited {
    color: #ffffff;
}

.cta-button:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.3);
}

.cta-button:hover {
    background: linear-gradient(135deg, #1e40af 0%, #1e3a8a 100%);
    color: #ffffff;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(59, 130, 246, 0.4);
}

.carousel-controls {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 100%;
    display: flex;
    justify-content: space-between;
    padding: 0 20px;
    z-index: 3;
}

.carousel-btn {
    background: rgba(255,255,255,0.3);
    border: none;
    color: #2d3748;
    font-size: 2.5rem;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.3s;
    backdrop-filter: blur(10px);
}

.carousel-btn:hover {
    background: rgba(255,255,255,0.5);
}


/* 通用区块样式 */
section {
    padding: 80px 0;
    position: relative;
    z-index: 1;
}

h2 {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 50px;
    color: #2d3748;
}

h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: #2d3748;
}

/* 公司简介预览 */
.about-preview {
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    position: relative;
    padding: 80px 0;
    margin: 0;
}

.about-preview h2 {
    margin: 0 0 20px 0;
    padding-top: 0;
}

.about-preview::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.02) 0%, rgba(30, 64, 175, 0.02) 100%);
    pointer-events: none;
}

.about-preview p {
    font-size: 1.1rem;
    text-align: center;
    max-width: 800px;
    margin: 0 auto 50px;
    line-height: 1.8;
}

/* 公司展示区域 */
.company-showcase {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 50px;
    margin-top: 60px;
    max-width: 1600px;
    margin-left: auto;
    margin-right: auto;
}

/* 大屏幕公司展示优化 */
@media (min-width: 1400px) {
    .company-showcase {
        gap: 60px;
        max-width: 1800px;
    }
    
    .showcase-image {
        padding-bottom: 56.25%; /* 保持16:9比例 */
    }
    
    .showcase-video {
        padding-bottom: 56.25%; /* 保持16:9比例 */
    }
    
    .showcase-content h3 {
        font-size: 2rem;
    }
    
    .showcase-content p {
        font-size: 1.2rem;
    }
}

@media (min-width: 1800px) {
    .company-showcase {
        gap: 70px;
        max-width: 2000px;
    }
    
    .showcase-image {
        padding-bottom: 56.25%; /* 保持16:9比例 */
    }
    
    .showcase-video {
        padding-bottom: 56.25%; /* 保持16:9比例 */
    }
    
    .showcase-content h3 {
        font-size: 2.2rem;
    }
    
    .showcase-content p {
        font-size: 1.3rem;
    }
}

.showcase-item {
    position: relative;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.showcase-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 35px rgba(0,0,0,0.2);
}

.showcase-image {
    position: relative;
    height: 0;
    padding-bottom: 56.25%; /* 16:9 比例 */
    overflow: hidden;
}

.showcase-image img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.showcase-item:hover .showcase-image img {
    transform: scale(1.1);
}

/* 视频展示区域 */
.showcase-video {
    position: relative;
    height: 0;
    padding-bottom: 56.25%; /* 16:9 比例 */
    overflow: hidden;
    background: #000;
}

.showcase-video-player {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.showcase-item:hover .showcase-video-player {
    transform: scale(1.05);
}

.video-play-button {
    position: absolute;
    bottom: 20px;
    right: 20px;
    width: 50px;
    height: 50px;
    background: rgba(59, 130, 246, 0.9);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #2d3748;
    font-size: 1.2rem;
    cursor: pointer;
    transition: all 0.3s ease;
    opacity: 0.6;
    z-index: 3;
}

.showcase-item:hover .video-play-button {
    opacity: 1;
    transform: scale(1.1);
}

/* 视频暂停时显示播放按钮 */
.showcase-video .video-play-button {
    opacity: 0.6;
}

.showcase-video:hover .video-play-button {
    opacity: 1;
}

.video-play-button:hover {
    background: rgba(0, 0, 0, 1);
    transform: scale(1.2);
}

/* 视频播放状态样式 */
.showcase-item.video-playing .showcase-overlay {
    opacity: 0.3;
}

.showcase-item.video-playing .video-play-button {
    opacity: 0.8;
}

.showcase-item.video-playing .video-play-button:hover {
    opacity: 1;
}

.showcase-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(0, 0, 0, 0.8) 0%, rgba(0, 0, 0, 0.6) 100%);
    display: flex;
    align-items: flex-end;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.showcase-item:hover .showcase-overlay {
    opacity: 1;
}

/* 视频自动播放时的覆盖层样式 */
.showcase-video .showcase-overlay {
    background: linear-gradient(135deg, rgba(0, 0, 0, 0.6) 0%, rgba(0, 0, 0, 0.3) 100%);
    opacity: 0.8;
    transition: opacity 0.3s ease;
}

.showcase-video:hover .showcase-overlay {
    opacity: 0.9;
}

.showcase-content {
    text-align: center;
    color: white;
    padding: 30px 25px 40px 25px;
    transform: translateY(20px);
    transition: all 0.3s ease;
    width: calc(100% - 80px);
    margin: 0 auto;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.8);
}

.showcase-item:hover .showcase-content {
    transform: translateY(0);
}

/* 视频区域的文字内容样式 */
.showcase-video .showcase-content {
    opacity: 0.8;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
}

.showcase-video:hover .showcase-content {
    opacity: 1;
    transform: translateY(0);
}

.showcase-content h3 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 15px;
    color: white;
    text-shadow: 3px 3px 6px rgba(0, 0, 0, 0.9);
}

.showcase-content p {
    font-size: 1.1rem;
    line-height: 1.6;
    color: white;
    margin: 0;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.8);
}

/* 产品展示 */
.products-preview {
    background: #ffffff;
    position: relative;
}

.products-preview h2 {
    color: #1a202c;
    text-shadow: none;
}

.products-preview::before {
    display: none;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 40px;
    max-width: 1400px;
    margin: 0 auto;
}

/* 大屏幕产品网格优化 */
@media (min-width: 1400px) {
    .products-grid {
        grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
        gap: 50px;
        max-width: 1600px;
    }
}

@media (min-width: 1800px) {
    .products-grid {
        grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
        gap: 60px;
        max-width: 1800px;
    }
}

/* 当有3个产品时，使用3列布局 */
.products-grid:has(.product-card:nth-child(3):last-child) {
    grid-template-columns: repeat(3, 1fr);
    max-width: 1200px;
}

@media (min-width: 1400px) {
    .products-grid:has(.product-card:nth-child(3):last-child) {
        max-width: 1400px;
    }
}

@media (min-width: 1800px) {
    .products-grid:has(.product-card:nth-child(3):last-child) {
        max-width: 1600px;
    }
}

.product-card {
    background: #ffffff;
    border: 3px solid #3b82f6;
    box-shadow: 0 8px 30px rgba(59, 130, 246, 0.2);
    border-radius: 20px;
    overflow: hidden;
    transition: all 0.4s ease;
    position: relative;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.product-card:nth-child(1) {
    border-color: #3b82f6;
    box-shadow: 0 8px 30px rgba(59, 130, 246, 0.2);
}

.product-card:nth-child(2) {
    border-color: #2563eb;
    box-shadow: 0 8px 30px rgba(37, 99, 235, 0.2);
}

.product-card:nth-child(3) {
    border-color: #1e40af;
    box-shadow: 0 8px 30px rgba(30, 64, 175, 0.2);
}

.product-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #f8fafc, #e2e8f0);
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: 2;
}

.product-card:hover {
    transform: translateY(-12px);
    box-shadow: 0 20px 50px rgba(44, 90, 160, 0.2);
}

.product-card:hover::before {
    opacity: 1;
}

.product-image-container {
    position: relative;
    height: 350px;
    overflow: hidden;
    border-radius: 20px 20px 0 0;
}

.product-image-container img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.product-card:hover .product-image-container img {
    transform: scale(1.08);
}

.product-card h3 {
    padding: 25px 25px 20px;
    color: #2d3748;
    font-size: 1.4rem;
    font-weight: 700;
    text-align: center;
    margin: 0;
    flex-grow: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.product-link {
    display: inline-block;
    color: #2d3748;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    padding: 12px 24px;
    background: rgba(255, 255, 255, 0.2);
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 25px;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    text-align: center;
    min-width: 120px;
}

.product-link:hover {
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    color: #2d3748;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 255, 255, 0.3);
    border-color: rgba(255, 255, 255, 0.9);
}

/* 页脚样式 */
#footer {
    background: linear-gradient(135deg, #1e40af 0%, #1e3a8a 100%);
    color: #ffffff;
    padding: 50px 0 20px;
    position: relative;
}

#footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 30% 30%, rgba(59, 130, 246, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 70% 70%, rgba(30, 64, 175, 0.1) 0%, transparent 50%),
        linear-gradient(135deg, rgba(59, 130, 246, 0.05) 0%, rgba(30, 64, 175, 0.05) 100%);
    pointer-events: none;
}

#footer h3,
#footer h4 {
    color: #ffffff;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
}

#footer p {
    color: rgba(255, 255, 255, 0.9);
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
}

.footer-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 40px;
}

/* 大屏幕页脚优化 */
@media (min-width: 1400px) {
    .footer-container {
        max-width: 1600px;
        padding: 0 60px;
    }
}

@media (min-width: 1800px) {
    .footer-container {
        max-width: 1800px;
        padding: 0 80px;
    }
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 30px;
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: 20px;
    color: #2d3748;
}

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

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

.footer-section ul li a {
    color: #ccc;
    text-decoration: none;
    transition: color 0.3s;
}

.footer-section ul li a:hover {
    color: #2d3748;
}

#footer .social-links {
    display: flex;
    gap: 15px;
    margin-top: 20px;
    align-items: center;
}

#footer .social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    color: #2d3748;
    text-align: center;
    line-height: 1;
    border-radius: 50%;
    text-decoration: none;
    transition: background 0.3s;
    font-size: 16px;
}

#footer .social-link:hover {
    background: #ffffff;
    border: 1px solid rgba(102, 126, 234, 0.1);
    box-shadow: 0 8px 30px rgba(102, 126, 234, 0.15);
    border: 1px solid rgba(102, 126, 234, 0.1);
    box-shadow: 0 4px 20px rgba(102, 126, 234, 0.1);
}

#footer .contact-info {
    background: none !important;
    padding: 0 !important;
    border: none !important;
    box-shadow: none !important;
}

#footer .contact-info p {
    margin-bottom: 10px;
    color: #ccc;
    display: flex;
    align-items: center;
    background: none !important;
    border: none !important;
    box-shadow: none !important;
    padding: 0 !important;
}

#footer .contact-info i {
    margin-right: 10px;
    color: #2d3748;
    width: 16px;
    text-align: center;
    flex-shrink: 0;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #333;
    color: #999;
}

/* 产品页面样式 */
.product-nav {
    background: #f8f9fa;
    padding: 20px 0;
    border-bottom: 1px solid #e9ecef;
}

.product-nav-tabs {
    display: flex;
    justify-content: center;
    gap: 20px;
}

.tab-link {
    padding: 10px 20px;
    background: #ffffff;
    border: 1px solid rgba(102, 126, 234, 0.1);
    box-shadow: 0 8px 30px rgba(102, 126, 234, 0.15);
    border: 1px solid rgba(102, 126, 234, 0.1);
    box-shadow: 0 4px 20px rgba(102, 126, 234, 0.1);
    color: #666;
    text-decoration: none;
    border-radius: 5px;
    transition: all 0.3s;
    border: 1px solid #e9ecef;
}

.tab-link:hover,
.tab-link.active {
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    color: #2d3748;
    border-color: #000000;
}

.product-section {
    display: none;
    padding: 60px 0;
}

.product-section.active {
    display: block;
}

.product-header {
    text-align: center;
    margin-bottom: 60px;
}

.product-header h2 {
    font-size: 2.8rem;
    font-weight: 300;
    color: #2d3748;
    margin-bottom: 0;
    letter-spacing: 1px;
}

.product-showcase {
    display: flex;
    flex-direction: column;
    gap: 80px;
    margin-bottom: 80px;
    max-width: 1400px;
    margin-left: auto;
    margin-right: auto;
    padding: 40px 20px;
}

.product-showcase-item {
    position: relative;
    background: #ffffff;
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: none;
    box-shadow: none;
}

.product-showcase-item:hover {
    transform: none;
    box-shadow: none;
}

.product-showcase-item.sky-end {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-areas: "image content";
    height: 650px;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

.product-showcase-item.ground-end {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-areas: "content image";
    height: 650px;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

.product-showcase-item.complete-set {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-areas: "image content";
    height: 650px;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

.product-image-section {
    grid-area: image;
    position: relative;
    overflow: hidden;
    height: 100%;
    min-height: 650px;
    background: #f8f9fa;
    margin: 0;
    padding: 0;
    border: none;
    line-height: 0;
    font-size: 0;
}

.product-image-section::before {
    display: none;
}

/* 简单轮播样式 */
.simple-carousel {
    width: 100%;
    height: 100%;
    position: relative;
    overflow: hidden;
    margin: 0;
    padding: 20px;
    border: none;
    font-size: 0;
    line-height: 0;
}

.simple-carousel .carousel-container {
    position: relative;
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
    border: none;
}

.simple-carousel .carousel-slides {
    position: relative;
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
}

.simple-carousel .slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 0.5s ease;
}

.simple-carousel .slide.active {
    opacity: 1;
}

.simple-carousel .slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    display: block;
    background: #e9ecef;
}

.simple-carousel .carousel-controls {
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    transform: translateY(-50%);
    display: flex;
    justify-content: space-between;
    padding: 0 20px;
    pointer-events: none;
    z-index: 10;
}

.simple-carousel .carousel-btn {
    background: rgba(255, 255, 255, 0.9);
    border: none;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    pointer-events: all;
    transition: all 0.3s ease;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.simple-carousel .carousel-btn:hover {
    background: rgba(255, 255, 255, 1);
    transform: scale(1.1);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.simple-carousel .carousel-btn i {
    font-size: 18px;
    color: #333;
}

/* 整套产品图片展示样式 */
.complete-set-image-container {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.complete-set-image {
    width: 100%;
    height: 100%;
    max-width: 600px;
    max-height: 500px;
    object-fit: contain;
    object-position: center;
    border-radius: 12px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    background: #f8f9fa;
}

.complete-set-image:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 35px rgba(0, 0, 0, 0.2);
}

/* 产品轮播样式 */
.product-carousel {
    width: 100%;
    height: 100%;
    position: relative;
    overflow: hidden;
    margin: 0;
    padding: 0;
    border: none;
    font-size: 0;
    line-height: 0;
}

.carousel-container {
    position: relative;
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
    border: none;
}

.carousel-track {
    position: relative;
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
    font-size: 0;
    line-height: 0;
}


/* 产品轮播图图片样式 */
.product-carousel .carousel-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 0.5s ease;
}

.product-carousel .carousel-slide.active {
    opacity: 1;
}

.product-carousel .carousel-slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    display: block;
    background: #e9ecef;
}

/* 图片加载失败时的样式 */
.product-carousel .carousel-slide img[src=""] {
    background: #e9ecef;
    display: flex;
    align-items: center;
    justify-content: center;
}

.product-carousel .carousel-slide img[src=""]::after {
    content: "图片加载中...";
    color: #6c757d;
    font-size: 16px;
}

.product-showcase-item:hover .carousel-slide img {
    transform: scale(1.08);
}

.carousel-controls {
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    transform: translateY(-50%);
    display: flex;
    justify-content: space-between;
    padding: 0 20px;
    z-index: 10;
    opacity: 0.7;
    transition: opacity 0.3s ease;
}

.product-carousel:hover .carousel-controls {
    opacity: 1;
}

.carousel-btn {
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    border: none;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.carousel-btn:hover {
    background: rgba(255, 255, 255, 1);
    transform: scale(1.1);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
}

.carousel-btn i {
    font-size: 16px;
    color: #2d3748;
    transition: color 0.3s ease;
}

.carousel-btn:hover i {
    color: #2d3748;
}


.product-specs-section {
    grid-area: content;
    padding: 60px 50px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    position: relative;
    min-height: 650px;
}

/* 为天空端和地面端添加底部间距，与整套系统保持一致 */
.product-showcase-item.sky-end .product-specs-section,
.product-showcase-item.ground-end .product-specs-section {
    padding-bottom: 60px;
}

.product-specs-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.9) 0%, rgba(248,250,252,0.9) 100%);
    z-index: 1;
}

.product-specs-section > * {
    position: relative;
    z-index: 2;
}

.product-specs-section h3 {
    font-size: 2.8rem;
    font-weight: 700;
    color: #1a202c;
    margin-bottom: 20px;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.product-slogan {
    font-size: 1.4rem;
    color: #4a5568;
    margin-bottom: 50px;
    font-weight: 400;
    line-height: 1.5;
}

.product-specs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

/* 统一所有产品参数框的布局 */
.product-showcase-item .product-specs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-auto-rows: 1fr;
    gap: 15px;
    align-items: stretch;
}

.product-showcase-item .spec-item {
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
}

.spec-item {
    background: rgba(255,255,255,0.8);
    border-radius: 12px;
    padding: 24px;
    border: 1px solid rgba(59, 130, 246, 0.3);
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
}

.spec-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    transition: width 0.3s ease;
}

.spec-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.1);
    border-color: rgba(102, 126, 234, 0.3);
}

.spec-item:hover::before {
    width: 8px;
}

.spec-label {
    font-weight: 500;
    color: #4a5568;
    font-size: 0.9rem;
    margin-bottom: 8px;
    display: block;
}

.spec-value {
    font-weight: 700;
    color: #1a202c;
    font-size: 1.1rem;
    display: block;
}

/* 大屏幕产品展示优化 */
@media (min-width: 1400px) {
    .product-showcase {
        gap: 150px;
        max-width: 1800px;
    }
    
    .product-showcase-item {
        height: 650px;
    }
    
    .product-showcase-item.sky-end,
    .product-showcase-item.ground-end,
    .product-showcase-item.complete-set {
        max-width: 1600px;
        padding: 0 40px;
    }
    
    .product-specs-section {
        padding: 70px 60px;
    }
    
    .product-showcase-item.sky-end .product-specs-section,
    .product-showcase-item.ground-end .product-specs-section {
        padding-bottom: 70px;
    }
    
    .product-specs-section h3 {
        font-size: 3rem;
    }
    
    .product-specs {
        gap: 25px;
    }
    
    .spec-item {
        padding: 25px;
    }
}

@media (min-width: 1800px) {
    .product-showcase {
        gap: 180px;
        max-width: 2000px;
    }
    
    .product-showcase-item {
        height: 750px;
    }
    
    .product-showcase-item.sky-end,
    .product-showcase-item.ground-end,
    .product-showcase-item.complete-set {
        max-width: 1800px;
        padding: 0 60px;
    }
    
    .product-specs-section {
        padding: 80px 70px;
    }
    
    .product-showcase-item.sky-end .product-specs-section,
    .product-showcase-item.ground-end .product-specs-section {
        padding-bottom: 80px;
    }
    
    .product-specs-section h3 {
        font-size: 3.5rem;
    }
}

/* 平板端响应式设计 */
@media (max-width: 1024px) {
    .product-showcase {
        gap: 80px;
        padding: 0 15px;
    }
    
    .product-showcase-item {
        height: 450px;
    }
    
    .product-specs-section {
        padding: 50px 40px;
    }
    
    .product-showcase-item.sky-end .product-specs-section,
    .product-showcase-item.ground-end .product-specs-section {
        padding-bottom: 60px;
    }
    
    .product-specs-section h3 {
        font-size: 2rem;
    }
    
    .product-specs {
        gap: 15px;
    }
    
    .spec-item {
        padding: 15px;
    }
}

/* 移动端响应式设计 */
@media (max-width: 768px) {
    .product-showcase {
        gap: 60px;
        padding: 0 10px;
    }
    
    .product-showcase-item {
        grid-template-columns: 1fr;
        grid-template-areas: "image" "content";
        height: 500px;
    }
    
    .product-showcase-item.ground-end,
    .product-showcase-item.complete-set {
        grid-template-areas: "image" "content";
    }
    
    .complete-set-image {
        max-width: 100%;
        max-height: 400px;
    }
    
    .product-image-section {
        height: 400px;
        min-height: 400px;
    }
    
    .carousel-controls {
        padding: 0 15px;
    }
    
    .carousel-btn {
        width: 40px;
        height: 40px;
    }
    
    .carousel-btn i {
        font-size: 14px;
    }
    
    
    .product-specs-section {
        padding: 40px 30px;
    }
    
    .product-showcase-item.sky-end .product-specs-section,
    .product-showcase-item.ground-end .product-specs-section {
        padding-bottom: 50px;
    }
    
    .product-specs-section h3 {
        font-size: 1.8rem;
    }
    
    .product-slogan {
        font-size: 1rem;
        margin-bottom: 25px;
    }
    
    .product-specs {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    
    .spec-item {
        padding: 15px;
    }
    
    .spec-label {
        font-size: 0.85rem;
    }
    
    .spec-value {
        font-size: 1rem;
    }
}

/* 当有3个产品时，使用3列布局 */
.product-grid:has(.product-item:nth-child(3):last-child) {
    grid-template-columns: repeat(3, 1fr);
    max-width: 1200px;
}

@media (min-width: 1400px) {
    .product-grid:has(.product-item:nth-child(3):last-child) {
        max-width: 1400px;
    }
}

@media (min-width: 1800px) {
    .product-grid:has(.product-item:nth-child(3):last-child) {
        max-width: 1600px;
    }
}

.product-item {
    background: #ffffff;
    border: 1px solid rgba(102, 126, 234, 0.1);
    box-shadow: 0 8px 30px rgba(102, 126, 234, 0.15);
    border: 1px solid rgba(102, 126, 234, 0.1);
    box-shadow: 0 4px 20px rgba(102, 126, 234, 0.1);
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 8px 25px rgba(0,0,0,0.12);
    transition: all 0.4s ease;
    position: relative;
}

.product-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 35px rgba(0,0,0,0.18);
}

.product-image {
    position: relative;
    overflow: hidden;
    height: 300px;
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.product-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(44, 90, 160, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s;
}

.product-item:hover .product-overlay {
    opacity: 1;
}

.product-item:hover .product-image img {
    transform: scale(1.1);
}

.view-details {
    background: #ffffff;
    border: 1px solid rgba(102, 126, 234, 0.1);
    box-shadow: 0 8px 30px rgba(102, 126, 234, 0.15);
    border: 1px solid rgba(102, 126, 234, 0.1);
    box-shadow: 0 4px 20px rgba(102, 126, 234, 0.1);
    color: #2d3748;
    border: none;
    padding: 10px 20px;
    border-radius: 5px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.3s;
}

.view-details:hover {
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    color: #2d3748;
}

.product-info {
    padding: 15px 20px 20px;
    position: relative;
    background: linear-gradient(to bottom, transparent, rgba(255,255,255,0.95));
    margin-top: -50px;
    z-index: 2;
}

.product-info h3 {
    color: #2d3748;
    margin-bottom: 8px;
    font-size: 1.1rem;
    font-weight: 600;
}

.product-info p {
    font-size: 0.85rem;
    color: #666;
    line-height: 1.4;
    margin: 0;
}

.product-features {
    list-style: none;
    margin: 15px 0;
}

.product-features li {
    padding: 5px 0;
    color: #666;
    position: relative;
    padding-left: 20px;
}

.product-features li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: #2d3748;
    font-weight: bold;
}

.product-price {
    font-size: 1.2rem;
    font-weight: bold;
    color: #2d3748;
    text-align: center;
    margin-top: 15px;
}

/* 生产视频展示 */
.production-video {
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    backdrop-filter: blur(5px);
    padding: 80px 0;
    position: relative;
}

.production-video::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(44, 90, 160, 0.01) 0%, rgba(30, 61, 114, 0.01) 100%);
    pointer-events: none;
}

.video-container {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 60px;
    align-items: stretch;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

.video-wrapper {
    position: relative;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 8px 32px rgba(0,0,0,0.12);
    background: #fff;
    transition: all 0.3s ease;
    border: 1px solid rgba(44, 90, 160, 0.1);
}

.video-wrapper:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 40px rgba(0,0,0,0.15);
    border-color: rgba(44, 90, 160, 0.2);
}

.production-video-player {
    width: 100%;
    height: 400px;
    object-fit: cover;
    display: block;
    background: #000;
}

.video-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.video-wrapper:hover .video-overlay {
    opacity: 1;
}

.video-label {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0,0,0,0.7));
    padding: 20px;
    color: #2d3748;
    font-size: 1.1rem;
    font-weight: 600;
    text-align: center;
    pointer-events: none;
    text-shadow: 0 1px 3px rgba(0,0,0,0.5);
}

/* 图片占位符样式 */
.image-placeholder {
    position: relative;
    width: 100%;
    height: 400px;
    border-radius: 16px;
    overflow: hidden;
    background: #f8f9fa;
}

.placeholder-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(59, 130, 246, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.image-placeholder:hover .placeholder-overlay {
    opacity: 1;
}

.placeholder-content {
    text-align: center;
    color: #2d3748;
}

.placeholder-content h3 {
    font-size: 1.5rem;
    margin-bottom: 10px;
    font-weight: 600;
}

.placeholder-content p {
    font-size: 1rem;
    opacity: 0.8;
}

.play-button {
    width: 70px;
    height: 70px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(102, 126, 234, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #2d3748;
    font-size: 1.8rem;
    transition: all 0.3s ease;
    cursor: pointer;
    box-shadow: 0 4px 20px rgba(0,0,0,0.2);
}

.play-button:hover {
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    color: #2d3748;
    transform: scale(1.05);
    box-shadow: 0 6px 25px rgba(44, 90, 160, 0.4);
}

.video-info {
    background: #fff;
    border-radius: 16px;
    padding: 35px 30px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.12);
    border: 1px solid rgba(44, 90, 160, 0.1);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: all 0.3s ease;
}

.video-info h3 {
    color: #2d3748;
    margin-bottom: 25px;
    font-size: 1.6rem;
    font-weight: 600;
    position: relative;
    padding-bottom: 8px;
}

.video-info h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 2px;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    border-radius: 1px;
}

.video-info p {
    color: #555;
    line-height: 1.7;
    margin-bottom: 25px;
    font-size: 1.05rem;
}

.video-features {
    list-style: none;
    margin-bottom: 0;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.video-features li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 0;
    color: #555;
    font-size: 0.95rem;
    transition: all 0.3s ease;
    position: relative;
    border-radius: 6px;
    padding-left: 8px;
    margin-left: -8px;
}

.video-features li:hover {
    color: #2d3748;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
}

.video-features li i {
    color: #2d3748;
    font-size: 0.9rem;
    background: rgba(59, 130, 246, 0.1);
    padding: 5px;
    border-radius: 50%;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.video-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-top: 0;
}

.video-stats .stat-item {
    text-align: center;
    padding: 20px 15px;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    border-radius: 12px;
    border: 1px solid rgba(44, 90, 160, 0.1);
    transition: all 0.3s ease;
    position: relative;
}

.video-stats .stat-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    border-radius: 12px 12px 0 0;
}

.video-stats .stat-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(44, 90, 160, 0.15);
    background: rgba(44, 90, 160, 0.08);
}

.video-stats .stat-number {
    display: block;
    font-size: 1.8rem;
    font-weight: 700;
    color: #2d3748;
    margin-bottom: 6px;
    line-height: 1;
}

.video-stats .stat-label {
    font-size: 0.85rem;
    color: #666;
    font-weight: 500;
}

/* 产品详情模态框 */
.product-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(59, 130, 246, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.product-modal.show {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: #ffffff;
    border: 1px solid rgba(102, 126, 234, 0.1);
    box-shadow: 0 8px 30px rgba(102, 126, 234, 0.15);
    border: 1px solid rgba(102, 126, 234, 0.1);
    box-shadow: 0 4px 20px rgba(102, 126, 234, 0.1);
    border-radius: 16px;
    max-width: 800px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    transform: scale(0.9);
    transition: transform 0.3s ease;
}

.product-modal.show .modal-content {
    transform: scale(1);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 25px 30px;
    border-bottom: 1px solid #eee;
}

.modal-header h2 {
    color: #2d3748;
    font-size: 1.5rem;
    font-weight: 600;
    margin: 0;
}

.modal-close {
    background: none;
    border: none;
    font-size: 2rem;
    color: #999;
    cursor: pointer;
    padding: 0;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.3s ease;
}

.modal-close:hover {
    background: #f5f5f5;
    color: #666;
}

.modal-body {
    padding: 30px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    align-items: start;
}

.modal-image img {
    width: 100%;
    height: 300px;
    object-fit: cover;
    border-radius: 12px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.modal-info h3 {
    color: #2d3748;
    font-size: 1.2rem;
    margin-bottom: 15px;
    font-weight: 600;
}

.modal-description {
    color: #666;
    line-height: 1.6;
    margin-bottom: 20px;
    font-size: 1rem;
}

.modal-features {
    list-style: none;
    margin-bottom: 25px;
}

.modal-features li {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 0;
    color: #555;
    font-size: 0.95rem;
}

.modal-features li::before {
    content: '✓';
    color: #2d3748;
    font-weight: bold;
    width: 20px;
    height: 20px;
    background: rgba(59, 130, 246, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
}

.modal-actions {
    display: flex;
    gap: 15px;
    margin-top: 20px;
}

.modal-actions .btn {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
    text-align: center;
}

.modal-actions .btn-primary {
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    color: #2d3748;
}

.modal-actions .btn-primary:hover {
    background: #ffffff;
    border: 1px solid rgba(102, 126, 234, 0.1);
    box-shadow: 0 8px 30px rgba(102, 126, 234, 0.15);
    border: 1px solid rgba(102, 126, 234, 0.1);
    box-shadow: 0 4px 20px rgba(102, 126, 234, 0.1);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(59, 130, 246, 0.3);
}

.modal-actions .btn-secondary {
    background: #f8f9fa;
    color: #2d3748;
    border: 1px solid #e9ecef;
}

.modal-actions .btn-secondary:hover {
    background: #e9ecef;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.1);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .modal-content {
        width: 95%;
        margin: 20px;
    }
    
    .modal-body {
        grid-template-columns: 1fr;
        gap: 20px;
        padding: 20px;
    }
    
    .modal-header {
        padding: 20px;
    }
    
    .modal-actions {
        flex-direction: column;
    }
    
    .modal-actions .btn {
        width: 100%;
    }
}

/* 技术规格 */
.tech-specs {
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    backdrop-filter: blur(5px);
    position: relative;
}

.tech-specs::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.02) 0%, rgba(30, 64, 175, 0.02) 100%);
    pointer-events: none;
}

.specs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.spec-category {
    background: #ffffff;
    border: 1px solid rgba(102, 126, 234, 0.1);
    box-shadow: 0 8px 30px rgba(102, 126, 234, 0.15);
    border: 1px solid rgba(102, 126, 234, 0.1);
    box-shadow: 0 4px 20px rgba(102, 126, 234, 0.1);
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.spec-category h3 {
    color: #2d3748;
    margin-bottom: 20px;
    text-align: center;
}

.spec-table {
    width: 100%;
    border-collapse: collapse;
}

.spec-table td {
    padding: 10px;
    border-bottom: 1px solid #e9ecef;
}

.spec-table td:first-child {
    font-weight: 500;
    color: #2d3748;
}

.spec-table td:last-child {
    color: #666;
    text-align: right;
}

/* 案例研究页面样式 */
.case-filter {
    background: #f8f9fa;
    padding: 20px 0;
    border-bottom: 1px solid #e9ecef;
}

.filter-tabs {
    display: flex;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 10px 20px;
    background: #ffffff;
    border: 1px solid rgba(102, 126, 234, 0.1);
    box-shadow: 0 8px 30px rgba(102, 126, 234, 0.15);
    border: 1px solid rgba(102, 126, 234, 0.1);
    box-shadow: 0 4px 20px rgba(102, 126, 234, 0.1);
    color: #666;
    border: 1px solid #e9ecef;
    border-radius: 25px;
    cursor: pointer;
    transition: all 0.3s;
}

.filter-btn:hover,
.filter-btn.active {
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    color: #2d3748;
    border-color: #000000;
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 30px;
}

.case-item {
    background: #ffffff;
    border: 1px solid rgba(102, 126, 234, 0.1);
    box-shadow: 0 8px 30px rgba(102, 126, 234, 0.15);
    border: 1px solid rgba(102, 126, 234, 0.1);
    box-shadow: 0 4px 20px rgba(102, 126, 234, 0.1);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    transition: all 0.3s;
    cursor: pointer;
}

.case-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.15);
}

.case-image {
    position: relative;
    overflow: hidden;
}

.case-image img {
    width: 100%;
    height: 250px;
    object-fit: cover;
    transition: transform 0.3s;
}

.case-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(44, 90, 160, 0.8);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s;
}

.case-item:hover .case-overlay {
    opacity: 1;
}

.case-item:hover .case-image img {
    transform: scale(1.1);
}

.case-category {
    background: rgba(255,255,255,0.9);
    color: #2d3748;
    padding: 5px 15px;
    border-radius: 15px;
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 15px;
}

.case-view-btn {
    background: #ffffff;
    border: 1px solid rgba(102, 126, 234, 0.1);
    box-shadow: 0 8px 30px rgba(102, 126, 234, 0.15);
    border: 1px solid rgba(102, 126, 234, 0.1);
    box-shadow: 0 4px 20px rgba(102, 126, 234, 0.1);
    color: #2d3748;
    border: none;
    padding: 10px 20px;
    border-radius: 5px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.3s;
}

.case-view-btn:hover {
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    color: #2d3748;
}

.case-content {
    padding: 25px;
}

.case-content h3 {
    color: #2d3748;
    margin-bottom: 10px;
}

.case-location {
    color: #666;
    margin-bottom: 15px;
    font-size: 0.9rem;
}

.case-location i {
    margin-right: 5px;
    color: #2d3748;
}

.case-description {
    color: #666;
    line-height: 1.6;
    margin-bottom: 20px;
}

.case-stats {
    display: flex;
    justify-content: space-between;
    gap: 15px;
}

.stat {
    text-align: center;
    flex: 1;
}

.stat-number {
    display: block;
    font-size: 1.5rem;
    font-weight: bold;
    color: #2d3748;
}

.stat-label {
    font-size: 0.8rem;
    color: #666;
}

/* 客户评价 */
.testimonials {
    background: #f8f9fa;
}

.testimonials-slider {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.testimonial-item {
    display: none;
    text-align: center;
    padding: 40px 20px;
}

.testimonial-item.active {
    display: block;
}

.testimonial-content {
    background: #ffffff;
    border: 1px solid rgba(102, 126, 234, 0.1);
    box-shadow: 0 8px 30px rgba(102, 126, 234, 0.15);
    border: 1px solid rgba(102, 126, 234, 0.1);
    box-shadow: 0 4px 20px rgba(102, 126, 234, 0.1);
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.quote-icon {
    font-size: 3rem;
    color: #2d3748;
    margin-bottom: 20px;
}

.testimonial-content p {
    font-size: 1.1rem;
    line-height: 1.8;
    color: #666;
    margin-bottom: 30px;
    font-style: italic;
}

.testimonial-author {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.author-info h4 {
    color: #2d3748;
    margin-bottom: 5px;
}

.author-info span {
    color: #666;
    font-size: 0.9rem;
}

.rating {
    color: #ffc107;
}

.testimonial-controls {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 30px;
}

.testimonial-btn {
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    color: #2d3748;
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.2rem;
    transition: background 0.3s;
}

.testimonial-btn:hover {
    background: #ffffff;
    border: 1px solid rgba(102, 126, 234, 0.1);
    box-shadow: 0 8px 30px rgba(102, 126, 234, 0.15);
    border: 1px solid rgba(102, 126, 234, 0.1);
    box-shadow: 0 4px 20px rgba(102, 126, 234, 0.1);
}

/* 关于我们页面样式 */
.company-intro {
    background: #ffffff;
    border: 1px solid rgba(102, 126, 234, 0.1);
    box-shadow: 0 8px 30px rgba(102, 126, 234, 0.15);
    border: 1px solid rgba(102, 126, 234, 0.1);
    box-shadow: 0 4px 20px rgba(102, 126, 234, 0.1);
}

.intro-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 50px;
    align-items: center;
}

.intro-text h2 {
    text-align: left;
    margin-bottom: 10px;
    color: #2d3748;
}

.intro-subtitle {
    font-size: 1.2rem;
    color: #666;
    margin-bottom: 20px;
}

.intro-text p {
    margin-bottom: 20px;
    line-height: 1.8;
    color: #666;
}

.intro-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-top: 30px;
}

.stat-item {
    text-align: center;
    padding: 20px;
    background: #f8f9fa;
    border-radius: 10px;
}

.stat-item .stat-number {
    display: block;
    font-size: 2rem;
    font-weight: bold;
    color: #2d3748;
    margin-bottom: 5px;
}

.stat-item .stat-label {
    color: #666;
    font-size: 0.9rem;
}

.intro-image img {
    width: 100%;
    border-radius: 10px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.1);
}


/* 核心优势 */
.core-advantages {
    background: #ffffff;
    border: 1px solid rgba(102, 126, 234, 0.1);
    box-shadow: 0 8px 30px rgba(102, 126, 234, 0.15);
    border: 1px solid rgba(102, 126, 234, 0.1);
    box-shadow: 0 4px 20px rgba(102, 126, 234, 0.1);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    max-width: 1000px;
    margin: 0 auto;
}

.advantage-card {
    background: #f8f9fa;
    padding: 40px 30px;
    border-radius: 10px;
    text-align: center;
    transition: transform 0.3s;
}

.advantage-card:hover {
    transform: translateY(-5px);
}

.advantage-icon {
    font-size: 3rem;
    color: #2d3748;
    margin-bottom: 20px;
}

.advantage-card h3 {
    color: #2d3748;
    margin-bottom: 15px;
}

.advantage-card p {
    color: #666;
    margin-bottom: 20px;
    line-height: 1.6;
}

.advantage-card ul {
    list-style: none;
    text-align: left;
}

.advantage-card ul li {
    padding: 5px 0;
    color: #666;
    position: relative;
    padding-left: 20px;
}

.advantage-card ul li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: #2d3748;
    font-weight: bold;
}


/* 生产车间展示 */
.production-showcase {
    background: #f8f9fa;
    padding: 80px 0;
}

.production-showcase .section-subtitle {
    text-align: center;
    color: #666;
    margin-bottom: 50px;
    font-size: 1.1rem;
}

.production-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    max-width: 1000px;
    margin: 0 auto;
}

.production-item {
    position: relative;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}

.production-item:hover {
    transform: translateY(-5px);
}

.production-image {
    position: relative;
    height: 250px;
    overflow: hidden;
}

.production-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.production-item:hover .production-image img {
    transform: scale(1.05);
}

.production-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0,0,0,0.8));
    color: #2d3748;
    padding: 30px 20px 20px;
    transform: translateY(100%);
    transition: transform 0.3s ease;
}

.production-item:hover .production-overlay {
    transform: translateY(0);
}

.production-overlay h3 {
    margin-bottom: 10px;
    font-size: 1.2rem;
    color: #2d3748;
}

.production-overlay p {
    margin: 0;
    font-size: 0.9rem;
    color: #ccc;
    line-height: 1.5;
}

/* 企业文化 */
.company-culture {
    background: #ffffff;
    border: 1px solid rgba(102, 126, 234, 0.1);
    box-shadow: 0 8px 30px rgba(102, 126, 234, 0.15);
    border: 1px solid rgba(102, 126, 234, 0.1);
    box-shadow: 0 4px 20px rgba(102, 126, 234, 0.1);
}

.culture-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}

.culture-item {
    text-align: center;
    padding: 40px 20px;
}

.culture-icon {
    font-size: 3rem;
    color: #2d3748;
    margin-bottom: 20px;
}

.culture-item h3 {
    color: #2d3748;
    margin-bottom: 15px;
}

.culture-item p {
    color: #666;
    line-height: 1.6;
}


/* 联系我们页面样式 */
.contact-form-section .contact-info {
    background: #f8f9fa;
    padding: 60px 0;
}

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

.contact-card {
    background: #ffffff;
    border: 1px solid rgba(102, 126, 234, 0.1);
    box-shadow: 0 8px 30px rgba(102, 126, 234, 0.15);
    border: 1px solid rgba(102, 126, 234, 0.1);
    box-shadow: 0 4px 20px rgba(102, 126, 234, 0.1);
    padding: 30px;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    transition: transform 0.3s;
}

.contact-card:hover {
    transform: translateY(-5px);
}

.contact-icon {
    font-size: 2.5rem;
    color: #2d3748;
    margin-bottom: 20px;
}

.contact-card h3 {
    color: #2d3748;
    margin-bottom: 15px;
}

.contact-card p {
    color: #666;
    line-height: 1.6;
}

/* 联系表单 */
.contact-form-section {
    background: #ffffff;
    border: 1px solid rgba(102, 126, 234, 0.1);
    box-shadow: 0 8px 30px rgba(102, 126, 234, 0.15);
    border: 1px solid rgba(102, 126, 234, 0.1);
    box-shadow: 0 4px 20px rgba(102, 126, 234, 0.1);
    padding: 60px 0;
}

/* 全站底部留言板（统一美化）*/
#global-guestbook.contact-form-section {
    background: linear-gradient(135deg, #eef2ff 0%, #e0e7ff 100%);
    position: relative;
    padding: 40px 0; /* 缩小上下留白 */
}

#global-guestbook.contact-form-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(800px 300px at 10% 10%, rgba(59, 130, 246, 0.08), transparent 60%),
        radial-gradient(800px 300px at 90% 90%, rgba(30, 64, 175, 0.08), transparent 60%);
    pointer-events: none;
}

#global-guestbook .contact-form-container {
    background: #ffffff;
    border: 1px solid rgba(59, 130, 246, 0.15);
    box-shadow: 0 8px 30px rgba(30, 58, 138, 0.15);
    border-radius: 16px;
    padding: 24px; /* 缩小内边距 */
}

/* 限制整体宽度并居中 */
#global-guestbook .container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 16px;
}

#global-guestbook .contact-form-container h2 {
    margin: 0 0 10px 0;
    font-size: 1.8rem;
    color: #1e3a8a;
}

#global-guestbook .contact-form-container p {
    color: #475569;
    margin-bottom: 24px;
}

#global-guestbook .form-group {
    margin-bottom: 18px;
}

#global-guestbook .form-group label {
    font-weight: 600;
    color: #334155;
    margin-bottom: 8px;
}

#global-guestbook input,
#global-guestbook select,
#global-guestbook textarea {
    width: 100%;
    border: 1px solid #e2e8f0;
    background: #f8fafc;
    border-radius: 10px;
    padding: 12px 14px;
    font-size: 1rem;
    transition: all 0.2s ease;
}

#global-guestbook input:focus,
#global-guestbook select:focus,
#global-guestbook textarea:focus {
    outline: none;
    border-color: #3b82f6;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
    background: #ffffff;
}

#global-guestbook .submit-btn {
    background: linear-gradient(135deg, #3b82f6, #1e40af);
    color: #ffffff;
    border: none;
    padding: 14px 18px;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.25s ease;
    width: 100%;
    box-shadow: 0 10px 25px rgba(59, 130, 246, 0.25);
}

#global-guestbook .submit-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 14px 30px rgba(30, 64, 175, 0.35);
}

#global-guestbook .submit-btn:active {
    transform: translateY(0);
}

/* 表单错误提示对齐 */
#global-guestbook .input-error {
    color: #dc2626;
    font-size: 0.85rem;
    margin-top: 6px;
}

/* 响应式优化 */
@media (max-width: 768px) {
    #global-guestbook .contact-form-container {
        padding: 20px;
    }
    #global-guestbook .contact-form-container h2 {
        font-size: 1.5rem;
    }
}

.form-map-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: start;
}

.contact-form-container h2 {
    text-align: left;
    margin-bottom: 10px;
}

.contact-form-container p {
    color: #666;
    margin-bottom: 30px;
}

.contact-form {
    background: #f8f9fa;
    padding: 30px;
    border-radius: 10px;
}

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

.form-group label {
    display: block;
    margin-bottom: 5px;
    color: #2d3748;
    font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 1rem;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #000000;
}

.checkbox-group {
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.checkbox-label {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    cursor: pointer;
    font-size: 0.9rem;
    color: #666;
}

.checkbox-label input[type="checkbox"] {
    width: auto;
    margin: 0;
}

.privacy-link {
    color: #2d3748;
    text-decoration: none;
}

.privacy-link:hover {
    text-decoration: underline;
}

.submit-btn {
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    color: #2d3748;
    border: none;
    padding: 15px 30px;
    border-radius: 5px;
    font-size: 1rem;
    cursor: pointer;
    transition: background 0.3s;
    width: 100%;
}

.submit-btn:hover {
    background: #ffffff;
    border: 1px solid rgba(102, 126, 234, 0.1);
    box-shadow: 0 8px 30px rgba(102, 126, 234, 0.15);
    border: 1px solid rgba(102, 126, 234, 0.1);
    box-shadow: 0 4px 20px rgba(102, 126, 234, 0.1);
}

.submit-btn:disabled {
    background: #ccc;
    cursor: not-allowed;
}

/* 地图容器 */
.map-container h2 {
    text-align: left;
    margin-bottom: 20px;
}

.map-wrapper {
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    margin-bottom: 20px;
}

.map {
    height: 300px;
    background: #f8f9fa;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background 0.3s;
}

.map:hover {
    background: #e9ecef;
}

.map-placeholder {
    text-align: center;
    color: #666;
}

.map-placeholder i {
    font-size: 3rem;
    color: #2d3748;
    margin-bottom: 15px;
}

.map-info h3 {
    color: #2d3748;
    margin-bottom: 15px;
}

.map-info ul {
    list-style: none;
}

.map-info ul li {
    padding: 8px 0;
    color: #666;
}

.map-info ul li i {
    margin-right: 10px;
    color: #2d3748;
    width: 20px;
}

/* 常见问题 */
.faq-section {
    background: #f8f9fa;
    padding: 60px 0;
}

.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: #ffffff;
    border: 1px solid rgba(102, 126, 234, 0.1);
    box-shadow: 0 8px 30px rgba(102, 126, 234, 0.15);
    border: 1px solid rgba(102, 126, 234, 0.1);
    box-shadow: 0 4px 20px rgba(102, 126, 234, 0.1);
    border-radius: 10px;
    margin-bottom: 15px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    overflow: hidden;
}

.faq-question {
    padding: 20px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background 0.3s;
}

.faq-question:hover {
    background: #f8f9fa;
}

.faq-question h3 {
    color: #2d3748;
    margin: 0;
    font-size: 1.1rem;
}

.faq-question i {
    color: #2d3748;
    transition: transform 0.3s;
}

.faq-answer {
    padding: 0 20px;
    max-height: 0;
    overflow: hidden;
    transition: all 0.3s;
}

.faq-item.active .faq-answer {
    padding: 20px;
    max-height: 200px;
}

.faq-answer p {
    color: #666;
    line-height: 1.6;
    margin: 0;
}

/* 社交媒体 */
.social-media {
    background: #ffffff;
    border: 1px solid rgba(102, 126, 234, 0.1);
    box-shadow: 0 8px 30px rgba(102, 126, 234, 0.15);
    border: 1px solid rgba(102, 126, 234, 0.1);
    box-shadow: 0 4px 20px rgba(102, 126, 234, 0.1);
    padding: 60px 0;
}

.social-media h2 {
    margin-bottom: 30px;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 30px;
    flex-wrap: wrap;
}

.social-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-decoration: none;
    color: #666;
    transition: color 0.3s;
    padding: 20px;
    border-radius: 10px;
    min-width: 120px;
}

.social-link:hover {
    color: #2d3748;
    background: #f8f9fa;
}

.social-link i {
    font-size: 2rem;
    margin-bottom: 10px;
}

.social-link span {
    font-size: 0.9rem;
}

/* 模态框样式 */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.5);
    opacity: 0;
    transition: opacity 0.3s;
}

.modal.show {
    opacity: 1;
}

.modal-content {
    background-color: white;
    margin: 5% auto;
    padding: 0;
    border-radius: 10px;
    width: 90%;
    max-width: 600px;
    max-height: 80vh;
    overflow-y: auto;
    transform: translateY(-50px);
    transition: transform 0.3s;
}

.modal.show .modal-content {
    transform: translateY(0);
}

.modal-header {
    padding: 20px;
    border-bottom: 1px solid #e9ecef;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    margin: 0;
    color: #2d3748;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: #666;
    padding: 0;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-close:hover {
    color: #2d3748;
}

.modal-body {
    padding: 20px;
}

.modal-footer {
    padding: 20px;
    border-top: 1px solid #e9ecef;
    text-align: right;
}

/* 按钮样式 */
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1rem;
    transition: all 0.3s;
    text-decoration: none;
    display: inline-block;
    text-align: center;
}

.btn-primary {
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    color: #2d3748;
}

.btn-primary:hover {
    background: #ffffff;
    border: 1px solid rgba(102, 126, 234, 0.1);
    box-shadow: 0 8px 30px rgba(102, 126, 234, 0.15);
    border: 1px solid rgba(102, 126, 234, 0.1);
    box-shadow: 0 4px 20px rgba(102, 126, 234, 0.1);
}

.btn-secondary {
    background: #6c757d;
    color: #2d3748;
}

.btn-secondary:hover {
    background: #545b62;
}

/* 通知样式 */
.notification {
    position: fixed;
    top: 100px;
    right: 20px;
    background: #ffffff;
    border: 1px solid rgba(102, 126, 234, 0.1);
    box-shadow: 0 8px 30px rgba(102, 126, 234, 0.15);
    border: 1px solid rgba(102, 126, 234, 0.1);
    box-shadow: 0 4px 20px rgba(102, 126, 234, 0.1);
    border-radius: 5px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
    z-index: 3000;
    transform: translateX(400px);
    transition: transform 0.3s;
}

.notification.show {
    transform: translateX(0);
}

.notification.error {
    border-left: 4px solid #dc3545;
}

.notification.info {
    border-left: 4px solid #3b82f6;
}

.notification-content {
    padding: 15px 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.notification-content i {
    color: #2d3748;
}

.notification.error .notification-content i {
    color: #dc3545;
}

/* 表单错误样式 */
.form-group.error input,
.form-group.error select,
.form-group.error textarea {
    border-color: #dc3545;
}

.error-message {
    color: #dc3545;
    font-size: 0.8rem;
    margin-top: 5px;
}

/* 成功模态框 */
.success-icon {
    text-align: center;
    margin-bottom: 20px;
}

.success-icon i {
    font-size: 4rem;
    color: #28a745;
}

/* 数据统计区块 */
.stats-section {
    background: linear-gradient(135deg, #3b82f6 0%, #1e40af 100%);
    color: #ffffff;
    padding: 80px 0;
    margin-bottom: 100px;
}

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

.stat-item {
    text-align: center;
    padding: 30px 20px;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 16px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.stat-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
}

.stat-number {
    font-size: 3rem;
    font-weight: bold;
    margin-bottom: 10px;
    color: #1a202c;
}

.stat-label {
    font-size: 1.1rem;
    color: #4a5568;
    font-weight: 500;
}

/* 区块副标题 */
.section-subtitle {
    text-align: center;
    font-size: 1.1rem;
    color: #666;
    margin-bottom: 50px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* 产品卡片增强 */
.product-card {
    position: relative;
    overflow: hidden;
}

.product-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(44, 90, 160, 0.9) 0%, rgba(30, 61, 114, 0.8) 100%);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: all 0.4s ease;
    padding: 20px;
}

.product-card:hover .product-overlay {
    opacity: 1;
}

.product-actions {
    margin-top: 20px;
}

.product-features {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
}

.feature-tag {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(102, 126, 234, 0.1);
    color: #2d3748;
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.product-specs {
    margin: 20px 25px;
    padding: 18px;
    background: #f8f9fa;
    border-radius: 8px;
    border-left: 4px solid #3b82f6;
}

.spec-item {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
    font-size: 0.95rem;
    color: #555;
    font-weight: 500;
}

.spec-item:last-child {
    margin-bottom: 0;
}

.spec-item i {
    color: #2d3748;
    width: 18px;
    font-size: 1rem;
}



/* 技术优势区块 */
.tech-advantages {
    background: linear-gradient(135deg, #f1f5f9 0%, #e2e8f0 100%);
    position: relative;
}

.tech-advantages h2 {
    color: #1a202c;
    text-shadow: none;
}

.tech-advantages h3 {
    color: #1a202c;
    text-shadow: none;
}

.tech-advantages p {
    color: #4a5568;
    text-shadow: none;
}

.tech-advantages::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 20%, rgba(59, 130, 246, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(30, 64, 175, 0.05) 0%, transparent 50%),
        linear-gradient(135deg, rgba(59, 130, 246, 0.02) 0%, rgba(30, 64, 175, 0.02) 100%);
    pointer-events: none;
}

.tech-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    max-width: 1400px;
    margin: 0 auto;
}

/* 大屏幕技术优势优化 */
@media (min-width: 1400px) {
    .tech-content {
        gap: 80px;
        max-width: 1600px;
    }
}

@media (min-width: 1800px) {
    .tech-content {
        gap: 100px;
        max-width: 1800px;
    }
}

.tech-text h2 {
    text-align: left;
    margin-bottom: 10px;
}

.tech-subtitle {
    font-size: 1.2rem;
    color: #666;
    margin-bottom: 20px;
}

.tech-text p {
    color: #666;
    line-height: 1.8;
    margin-bottom: 30px;
}

.tech-features {
    margin-bottom: 30px;
}

.tech-feature {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    margin-bottom: 20px;
    padding: 20px;
    background: rgba(255, 255, 255, 0.8);
    border-radius: 12px;
    border-left: 4px solid #3b82f6;
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.1);
    transition: all 0.3s ease;
}

.tech-feature:hover {
    transform: translateX(5px);
    box-shadow: 0 6px 20px rgba(59, 130, 246, 0.15);
}

.tech-feature i {
    font-size: 1.5rem;
    color: #3b82f6;
    margin-top: 5px;
}

.tech-feature-content h4 {
    color: #2d3748;
    margin-bottom: 5px;
}

.tech-feature-content p {
    color: #666;
    font-size: 0.9rem;
    margin: 0;
}

.tech-image img {
    width: 100%;
    border-radius: 10px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.1);
}

/* 案例预览区块 */
.cases-preview {
    background: #ffffff;
    position: relative;
}

.cases-preview h2 {
    color: #1a202c;
    text-shadow: none;
}

.cases-preview::before {
    display: none;
}

/* 成功案例网格样式 */
.cases-grid {
    display: flex;
    gap: 0;
    margin: 60px 0;
    height: 500px;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.case-item {
    flex: 1;
    position: relative;
    overflow: hidden;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.case-item:hover {
    flex: 3;
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    z-index: 10;
}

.case-image {
    width: 100%;
    height: 100%;
    position: relative;
    overflow: hidden;
}

.case-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.case-item:hover .case-image img {
    transform: scale(1.15);
}

.case-overlay {
    display: none;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .cases-grid {
        height: 350px;
        gap: 15px;
    }
    
    .case-overlay h3 {
        font-size: 1.1rem;
    }
    
    .case-overlay p {
        font-size: 0.85rem;
    }
}

@media (max-width: 768px) {
    .cases-grid {
        flex-direction: column;
        height: auto;
        gap: 20px;
    }
    
    .case-item {
        height: 250px;
    }
    
    .case-item:hover {
        flex: 1;
        transform: translateY(-3px);
    }
    
    .case-overlay {
        transform: translateY(0);
        background: linear-gradient(transparent, rgba(0, 0, 0, 0.6));
    }
}

/* 整机展示样式 */
.complete-machine-showcase {
    display: flex;
    gap: 40px;
    margin: 60px 0;
}

.complete-machine-item {
    flex: 1;
    background: #ffffff;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

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

.complete-machine-image {
    height: 550px;
    overflow: hidden;
}

.complete-machine-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.complete-machine-item:hover .complete-machine-image img {
    transform: scale(1.05);
}

.complete-machine-info {
    padding: 30px;
    text-align: center;
}

.complete-machine-info h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: #1a202c;
    margin-bottom: 10px;
}

.complete-machine-info p {
    font-size: 1rem;
    color: #4a5568;
    margin: 0;
}

/* 光纤通信产品展示样式 */
.optical-products {
    display: flex;
    flex-direction: column;
    gap: 40px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 20px;
}

.optical-products .product-card {
    background: #ffffff;
    border-radius: 16px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    display: grid;
    grid-template-columns: 1fr 1fr;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.optical-products .product-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
}

.optical-products .product-image {
    position: relative;
    overflow: hidden;
    background: #f8f9fa;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 30px;
    height: 100%;
}

/* 轮播图在新布局中的样式 */
.optical-products .simple-carousel {
    width: 100%;
    height: 100%;
    position: relative;
    overflow: hidden;
}

.optical-products .simple-carousel .carousel-container {
    position: relative;
    width: 100%;
    height: 100%;
}

.optical-products .simple-carousel .carousel-slides {
    position: relative;
    width: 100%;
    height: 100%;
}

.optical-products .simple-carousel .slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 0.5s ease;
}

.optical-products .simple-carousel .slide.active {
    opacity: 1;
}

.optical-products .simple-carousel .slide img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    object-position: center;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.optical-products .simple-carousel .carousel-controls {
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    transform: translateY(-50%);
    display: flex;
    justify-content: space-between;
    padding: 0 20px;
    pointer-events: none;
    z-index: 10;
}

.optical-products .simple-carousel .carousel-btn {
    background: rgba(255, 255, 255, 0.9);
    border: none;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    pointer-events: all;
    transition: all 0.3s ease;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.optical-products .simple-carousel .carousel-btn:hover {
    background: rgba(255, 255, 255, 1);
    transform: scale(1.1);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.optical-products .simple-carousel .carousel-btn i {
    font-size: 18px;
    color: #333;
}

.optical-products .product-image img {
    max-width: 90%;
    max-height: 90%;
    width: auto;
    height: auto;
    object-fit: contain;
    object-position: center;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.optical-products .product-content {
    padding: 40px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.optical-products .product-content h3 {
    font-size: 2rem;
    font-weight: 700;
    color: #1a202c;
    margin-bottom: 15px;
    line-height: 1.2;
}

.optical-products .product-desc {
    font-size: 1.2rem;
    color: #4a5568;
    margin-bottom: 30px;
    line-height: 1.5;
}

.optical-products .product-specs {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 15px;
    margin-bottom: 30px;
}

/* 天空端和地面端使用2列布局 */
.optical-products .product-card:nth-child(2) .product-specs,
.optical-products .product-card:nth-child(3) .product-specs {
    grid-template-columns: repeat(2, 1fr);
}

.optical-products .spec-row {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 15px;
    background: rgba(59, 130, 246, 0.05);
    border-radius: 8px;
    border: 1px solid rgba(59, 130, 246, 0.1);
}

.optical-products .spec-label {
    font-size: 0.9rem;
    color: #4a5568;
    margin-bottom: 5px;
    font-weight: 500;
}

.optical-products .spec-value {
    font-size: 1rem;
    color: #1a202c;
    font-weight: 600;
}

.optical-products .product-action {
    text-align: center;
}

.optical-products .download-btn {
    background: linear-gradient(135deg, #2c5aa0, #1e3a8a);
    color: white;
    border: none;
    padding: 15px 30px;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    box-shadow: 0 4px 15px rgba(44, 90, 160, 0.3);
}

.optical-products .download-btn:hover {
    background: linear-gradient(135deg, #1e3a8a, #1e40af);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(44, 90, 160, 0.4);
}

.optical-products .download-btn i {
    font-size: 1.1rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .optical-products .product-card {
        grid-template-columns: 1fr;
        min-height: auto;
    }
    
    .optical-products .product-image {
        height: 250px;
        padding: 20px;
    }
    
    .optical-products .simple-carousel .carousel-controls {
        padding: 0 15px;
    }
    
    .optical-products .simple-carousel .carousel-btn {
        width: 40px;
        height: 40px;
    }
    
    .optical-products .simple-carousel .carousel-btn i {
        font-size: 14px;
    }
    
    .optical-products .product-content {
        padding: 30px 20px;
    }
    
    .optical-products .product-specs {
        grid-template-columns: 1fr;
        gap: 10px;
    }
    
    .optical-products .product-card:nth-child(2) .product-specs,
    .optical-products .product-card:nth-child(3) .product-specs {
        grid-template-columns: 1fr;
    }
}

/* 成功案例轮播样式 */
.cases-carousel-container {
    position: relative;
    max-width: 100%;
    margin: 0;
    width: 100%;
}

.cases-carousel {
    position: relative;
    overflow: hidden;
    border-radius: 0;
    height: 100vh;
    width: 100%;
    min-height: 800px;
}

.cases-track {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0;
    padding: 0;
    width: 100%;
    height: 100%;
    perspective: 1000px;
    transform-style: preserve-3d;
}

.case-card {
    flex: 0 0 100%;
    height: 100vh;
    background: #ffffff;
    border: none;
    box-shadow: none;
    border-radius: 0;
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    transform: scale(0.7) translateZ(-100px);
    opacity: 0.5;
    cursor: pointer;
}

.case-card.active {
    transform: scale(1) translateZ(0);
    opacity: 1;
    z-index: 3;
    box-shadow: none;
}

.case-card.prev {
    transform: scale(0.8) translateX(-100%) translateZ(-50px);
    opacity: 0.7;
    z-index: 2;
}

.case-card.next {
    transform: scale(0.8) translateX(100%) translateZ(-50px);
    opacity: 0.7;
    z-index: 2;
}

.case-card.prev-prev {
    transform: scale(0.6) translateX(-200%) translateZ(-150px);
    opacity: 0.3;
    z-index: 1;
}

.case-card.next-next {
    transform: scale(0.6) translateX(200%) translateZ(-150px);
    opacity: 0.3;
    z-index: 1;
}

.case-card:hover {
    transform: scale(1.02);
}

.case-card.active:hover {
    transform: scale(1.05);
}

/* 案例卡片内容布局 */
.case-card .case-image {
    height: 100%;
    position: relative;
    overflow: hidden;
    border-radius: 0;
}

.case-card .case-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.case-card:hover .case-image img {
    transform: scale(1.05);
}

.case-card .case-overlay {
    position: absolute;
    top: 15px;
    left: 15px;
    background: rgba(59, 130, 246, 0.8);
    color: #2d3748;
    padding: 5px 12px;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 500;
}

.case-card .case-content {
    padding: 40px;
    height: 300px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.case-card .case-content h3 {
    font-size: 1.8rem;
    font-weight: 700;
    color: #2d3748;
    margin-bottom: 15px;
    line-height: 1.3;
}

.case-card .case-content p {
    font-size: 1.1rem;
    color: #4a5568;
    line-height: 1.6;
    margin-bottom: 20px;
    flex-grow: 1;
}

.case-card .case-location {
    font-size: 1rem;
    color: #718096;
    margin-bottom: 15px;
}

.case-card .case-location i {
    color: #2d3748;
    margin-right: 5px;
}

.case-card .case-stats {
    display: flex;
    gap: 15px;
    margin-top: 10px;
}

.case-card .case-stat {
    text-align: center;
    flex: 1;
}

.case-card .stat-number {
    display: block;
    font-size: 1.8rem;
    font-weight: 700;
    color: #2d3748;
    margin-bottom: 5px;
}

.case-card .stat-label {
    font-size: 1rem;
    color: #4a5568;
    font-weight: 500;
}

/* 轮播控制按钮 */
.carousel-controls {
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    transform: translateY(-50%);
    display: flex;
    justify-content: space-between;
    padding: 0 20px;
    z-index: 10;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.cases-carousel:hover .carousel-controls {
    opacity: 1;
}

.carousel-btn {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(102, 126, 234, 0.1);
    border: none;
    border-radius: 50%;
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    box-shadow: 0 12px 35px rgba(0, 0, 0, 0.15);
}

.carousel-btn:hover {
    background: rgba(255, 255, 255, 1);
    transform: scale(1.1);
    box-shadow: 0 12px 35px rgba(0, 0, 0, 0.2);
}

.carousel-btn i {
    font-size: 28px;
    color: #2d3748;
    transition: color 0.3s ease;
}

.carousel-btn:hover i {
    color: #1a4480;
}


.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
    max-width: 1400px;
    margin-left: auto;
    margin-right: auto;
}

/* 大屏幕案例网格优化 */
@media (min-width: 1400px) {
    .cases-grid {
        gap: 50px;
        max-width: 1600px;
    }
}

@media (min-width: 1800px) {
    .cases-grid {
        gap: 60px;
        max-width: 1800px;
    }
}

.case-card {
    background: #ffffff;
    border: 1px solid rgba(102, 126, 234, 0.1);
    box-shadow: 0 8px 30px rgba(102, 126, 234, 0.15);
    border: 1px solid rgba(102, 126, 234, 0.1);
    box-shadow: 0 4px 20px rgba(102, 126, 234, 0.1);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    transition: transform 0.3s;
}

.case-card:hover {
    transform: translateY(-5px);
}

.case-image {
    position: relative;
    overflow: hidden;
}

.case-image img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    transition: transform 0.3s;
}

.case-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(44, 90, 160, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s;
}

.case-card:hover .case-overlay {
    opacity: 1;
}

.case-card:hover .case-image img {
    transform: scale(1.1);
}

.case-category {
    background: rgba(255,255,255,0.9);
    color: #2d3748;
    padding: 5px 15px;
    border-radius: 15px;
    font-size: 0.9rem;
    font-weight: 500;
}

.case-content {
    padding: 25px;
}

.case-content h3 {
    color: #2d3748;
    margin-bottom: 10px;
}

.case-location {
    color: #666;
    margin-bottom: 15px;
    font-size: 0.9rem;
}

.case-location i {
    margin-right: 5px;
    color: #2d3748;
}

.case-content p {
    color: #666;
    line-height: 1.6;
    margin-bottom: 20px;
}

.case-stats {
    display: flex;
    justify-content: space-between;
    gap: 15px;
}

.case-stat {
    text-align: center;
    flex: 1;
}

.case-stat .stat-number {
    display: block;
    font-size: 1.5rem;
    font-weight: bold;
    color: #2d3748;
}

.case-stat .stat-label {
    font-size: 0.8rem;
    color: #666;
}

.cases-cta {
    text-align: center;
}

/* 客户评价预览 */
.testimonials-preview {
    background: linear-gradient(135deg, #e0f2fe 0%, #bae6fd 100%);
    backdrop-filter: blur(5px);
    position: relative;
}

.testimonials-preview::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 20%, rgba(59, 130, 246, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(30, 64, 175, 0.08) 0%, transparent 50%),
        linear-gradient(135deg, rgba(59, 130, 246, 0.02) 0%, rgba(30, 64, 175, 0.02) 100%);
    pointer-events: none;
}

.testimonials-slider {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.testimonial-item {
    display: none;
    text-align: center;
    padding: 40px 20px;
}

.testimonial-item.active {
    display: block;
}

.testimonial-content {
    background: #f8f9fa;
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.quote-icon {
    font-size: 3rem;
    color: #2d3748;
    margin-bottom: 20px;
}

.testimonial-content p {
    font-size: 1.1rem;
    line-height: 1.8;
    color: #666;
    margin-bottom: 30px;
    font-style: italic;
}

.testimonial-author {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.author-info h4 {
    color: #2d3748;
    margin-bottom: 5px;
}

.author-info span {
    color: #666;
    font-size: 0.9rem;
}

.rating {
    color: #ffc107;
}

.testimonial-controls {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 30px;
}

.testimonial-btn {
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    color: #2d3748;
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.2rem;
    transition: background 0.3s;
}

.testimonial-btn:hover {
    background: #ffffff;
    border: 1px solid rgba(102, 126, 234, 0.1);
    box-shadow: 0 8px 30px rgba(102, 126, 234, 0.15);
    border: 1px solid rgba(102, 126, 234, 0.1);
    box-shadow: 0 4px 20px rgba(102, 126, 234, 0.1);
}

/* 联系我们CTA */
.contact-cta {
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    color: #2d3748;
    padding: 80px 0;
    text-align: center;
}

.cta-content h2 {
    color: #2d3748;
    margin-bottom: 15px;
}

.cta-content p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    opacity: 0.9;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.cta-button.primary {
    background: #ffffff;
    border: 1px solid rgba(102, 126, 234, 0.1);
    box-shadow: 0 8px 30px rgba(102, 126, 234, 0.15);
    border: 1px solid rgba(102, 126, 234, 0.1);
    box-shadow: 0 4px 20px rgba(102, 126, 234, 0.1);
    color: #2d3748;
}

.cta-button.primary:hover {
    background: #f8f9fa;
}

.cta-button.secondary {
    background: transparent;
    color: #2d3748;
    border: 2px solid white;
}

.cta-button.secondary:hover {
    background: #ffffff;
    border: 1px solid rgba(102, 126, 234, 0.1);
    box-shadow: 0 8px 30px rgba(102, 126, 234, 0.15);
    border: 1px solid rgba(102, 126, 234, 0.1);
    box-shadow: 0 4px 20px rgba(102, 126, 234, 0.1);
    color: #2d3748;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .page-header h1 {
        font-size: 2rem;
    }
    
    .page-header p {
        font-size: 1rem;
    }
    
    .hero-section {
        height: 60vh;
        min-height: 500px;
        max-height: 700px;
    }
    
    .carousel-content {
        left: 5%;
        max-width: 90%;
    }
    
    .carousel-content h1 {
        font-size: 2.5rem;
    }
    
    .carousel-content p {
        font-size: 1.1rem;
        max-width: 100%;
    }
    
    .video-container {
        grid-template-columns: 1fr;
        gap: 35px;
        padding: 0 20px;
    }
    
    .production-video-player {
        height: 280px;
    }
    
    .video-wrapper {
        padding: 15px;
    }
    
    .video-overlay {
        top: 15px;
        left: 15px;
        right: 15px;
        bottom: 15px;
    }
    
    .video-label {
        padding: 15px;
        font-size: 1rem;
    }
    
    .video-info {
        padding: 35px 30px;
    }
    
    .video-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
    
    .cta-button {
        padding: 15px 30px;
        font-size: 1rem;
    }
    
    .carousel-btn {
        width: 50px;
        height: 50px;
        font-size: 2rem;
    }
    
    h2 {
        font-size: 2rem;
    }
    
    .company-showcase {
        grid-template-columns: 1fr;
        gap: 25px;
    }
    
    .showcase-image {
        padding-bottom: 56.25%; /* 保持16:9比例 */
    }
    
    .showcase-video {
        padding-bottom: 56.25%; /* 保持16:9比例 */
    }
    
    .showcase-content h3 {
        font-size: 1.5rem;
    }
    
    .showcase-content p {
        font-size: 1rem;
    }
    
    .products-grid {
        grid-template-columns: 1fr;
    }
    
    .products-grid:has(.product-card:nth-child(4)) {
        grid-template-columns: 1fr;
    }
    
    .product-image-container {
        height: 250px;
    }
    
    .product-card h3 {
        padding: 20px 20px 15px;
        font-size: 1.2rem;
    }
    
    .product-specs {
        margin: 15px 20px;
        padding: 15px;
    }
    
    .product-link {
        margin: 0 20px 20px;
        padding: 6px 12px;
        font-size: 0.9rem;
    }
    
    .product-grid:has(.product-item:nth-child(3):last-child) {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    #footer .social-links {
        justify-content: center;
        margin-top: 20px;
    }
    
    #footer .contact-info p {
        justify-content: center;
    }
    
    .intro-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .intro-stats {
        grid-template-columns: 1fr;
    }
    
    .advantages-grid {
        grid-template-columns: 1fr;
        gap: 20px;
        max-width: 100%;
    }
    
    .production-grid {
        grid-template-columns: 1fr;
        gap: 20px;
        max-width: 100%;
    }
    
    .production-image {
        height: 200px;
    }
}

/* 中等屏幕尺寸优化 */
@media (max-width: 768px) {
    .hero-section {
        height: 50vh;
        min-height: 400px;
        max-height: 600px;
    }
    
    .carousel-content {
        left: 5%;
        max-width: 90%;
    }
    
    .carousel-content h1 {
        font-size: 2rem;
    }
    
    .carousel-content p {
        font-size: 1rem;
        max-width: 100%;
    }
    
    .cta-button {
        padding: 12px 25px;
        font-size: 0.9rem;
    }
    
    .carousel-btn {
        width: 45px;
        height: 45px;
        font-size: 1.8rem;
    }
    
    .advantages-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .production-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .production-image {
        height: 180px;
    }
    
    .company-showcase {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .showcase-image {
        padding-bottom: 56.25%; /* 保持16:9比例 */
    }
    
    .showcase-video {
        padding-bottom: 56.25%; /* 保持16:9比例 */
    }
    
    .showcase-content h3 {
        font-size: 1.4rem;
    }
    
    .showcase-content p {
        font-size: 0.95rem;
    }
    
    
    /* 平板端轮播响应式设计 */
    .cases-carousel {
        height: 550px;
    }
    
    .cases-track {
        gap: 18px;
        padding: 30px 0;
    }
    
    .case-card {
        flex: 0 0 280px;
        height: 380px;
    }
    
    .case-card .case-image {
        height: 180px;
    }
    
    .case-card .case-content {
        padding: 18px;
        height: 200px;
    }
    
    .case-card .case-content h3 {
        font-size: 1.1rem;
    }
    
    .case-card .case-content p {
        font-size: 0.85rem;
    }
    
    .case-card .case-stats {
        gap: 12px;
    }
    
    .carousel-controls {
        padding: 0 18px;
    }
    
    .carousel-btn {
        width: 55px;
        height: 55px;
    }
    
    .carousel-btn i {
        font-size: 18px;
    }
    
    .product-image-container {
        height: 220px;
    }
    
    .product-card h3 {
        padding: 18px 18px 12px;
        font-size: 1.1rem;
    }
    
    .product-specs {
        margin: 12px 18px;
        padding: 12px;
    }
    
    .product-link {
        margin: 0 18px 18px;
        padding: 5px 10px;
        font-size: 0.85rem;
    }
}

/* 小屏幕尺寸优化 */
@media (max-width: 480px) {
    .hero-section {
        height: 45vh;
        min-height: 350px;
        max-height: 500px;
    }
    
    .carousel-content {
        left: 5%;
        max-width: 90%;
    }
    
    .carousel-content h1 {
        font-size: 1.8rem;
    }
    
    .carousel-content p {
        font-size: 0.9rem;
        max-width: 100%;
    }
    
    .cta-button {
        padding: 10px 20px;
        font-size: 0.8rem;
    }
    
    .carousel-btn {
        width: 40px;
        height: 40px;
        font-size: 1.5rem;
    }
    
    
    .company-showcase {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .showcase-image {
        padding-bottom: 56.25%; /* 保持16:9比例 */
    }
    
    .showcase-video {
        padding-bottom: 56.25%; /* 保持16:9比例 */
    }
    
    .showcase-content h3 {
        font-size: 1.3rem;
    }
    
    .showcase-content p {
        font-size: 0.9rem;
    }
    
    .video-play-button {
        width: 45px;
        height: 45px;
        font-size: 1rem;
        bottom: 15px;
        right: 15px;
    }
    
    .showcase-content {
        padding: 20px 20px 30px 20px;
        width: calc(100% - 70px);
        margin: 0 auto;
    }
    
    .applications-grid {
        grid-template-columns: 1fr;
        gap: 15px;
        max-width: 400px;
    }
    
    
    /* 轮播响应式设计 */
    .cases-carousel {
        height: 500px;
    }
    
    .cases-track {
        gap: 15px;
        padding: 20px 0;
    }
    
    .case-card {
        flex: 0 0 250px;
        height: 350px;
    }
    
    .case-card .case-image {
        height: 150px;
    }
    
    .case-card .case-content {
        padding: 15px;
        height: 200px;
    }
    
    .case-card .case-content h3 {
        font-size: 1rem;
    }
    
    .case-card .case-content p {
        font-size: 0.8rem;
    }
    
    .case-card .case-stats {
        flex-direction: column;
        gap: 10px;
    }
    
    .carousel-controls {
        padding: 0 15px;
    }
    
    .carousel-btn {
        width: 50px;
        height: 50px;
    }
    
    .carousel-btn i {
        font-size: 16px;
    }
    
    
    .product-image-container {
        height: 200px;
    }
    
    .product-card h3 {
        padding: 15px 15px 10px;
        font-size: 1rem;
    }
    
    .product-specs {
        margin: 10px 15px;
        padding: 10px;
    }
    
    .spec-item {
        font-size: 0.8rem;
        gap: 8px;
    }
    
    .product-link {
        margin: 0 15px 15px;
        padding: 4px 8px;
        font-size: 0.8rem;
    }
    
    .advantages-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .advantage-card {
        padding: 30px 20px;
    }
    
    .advantage-icon {
        font-size: 2.5rem;
    }
    
    .production-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .production-image {
        height: 150px;
    }
    
    .production-overlay {
        padding: 20px 15px 15px;
    }
    
    .production-overlay h3 {
        font-size: 1rem;
    }
    
    .production-overlay p {
        font-size: 0.8rem;
    }
    
    .form-map-container {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .cases-grid {
        grid-template-columns: 1fr;
    }
    
    .case-stats {
        flex-direction: column;
        gap: 10px;
    }
    
    .testimonial-author {
        flex-direction: column;
        gap: 10px;
        text-align: center;
    }
    
    .social-links {
        gap: 20px;
    }
    
    .modal-content {
        width: 95%;
        margin: 10% auto;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .applications-grid {
        grid-template-columns: 1fr;
        gap: 25px;
        max-width: 350px;
    }
    
    
    .tech-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .tech-text h2 {
        text-align: center;
    }
    
    .cases-grid {
        grid-template-columns: 1fr;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .cta-button {
        width: 200px;
    }
    
    .video-container {
        grid-template-columns: 1fr;
        gap: 40px;
        padding: 0 15px;
    }
    
    .production-video-player {
        height: 240px;
    }
    
    .video-wrapper {
        padding: 15px;
    }
    
    .video-overlay {
        top: 15px;
        left: 15px;
        right: 15px;
        bottom: 15px;
    }
    
    .video-label {
        padding: 12px;
        font-size: 0.9rem;
    }
    
    .video-info {
        padding: 30px 25px;
    }
    
    .video-info h3 {
        font-size: 1.6rem;
    }
    
    .video-stats {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .video-stats .stat-item {
        padding: 20px 15px;
    }
    
    .video-stats .stat-number {
        font-size: 1.5rem;
    }
}