/* 腾龙精线集团官网 - 小清新风格 */
:root {
    --color-primary: #1A3C6E; /* - 主色 */
    --color-tech-blue: #005F8E; /* 科技蓝 - 辅助色 */
    --color-light-bg: #F8F9FA; /* 浅灰白 - 背景色 */
    --color-warm-bg: #F5E6D3; /* 浅米色 - 产品背景 */
    --color-cta: #FF6B35; /* 亮橙色 - 行动按钮 */
    --color-dark-green: #32beff; /* 深绿色 - 渐变用 */
    --color-text-dark: #333333; /* 主文本色 */
    --color-text-light: #FFFFFF; /* 浅色文本 */
    --color-text-grey: #6C757D; /* 灰色文本 */
	--color-text-foot: #0f2341;
	--color-text-white: #FFFFFF;  
    --transition-speed: 0.3s;
    --border-radius: 12px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Helvetica Neue', 'Arial', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: var(--color-text-dark);
    overflow-x: hidden;
    background-color: var(--color-light-bg);
}

/* 防止移动端菜单打开时页面滚动 */
body.no-scroll {
    overflow: hidden;
    position: fixed;
    width: 100%;
}

/* 导航栏样式 */
.header-nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    transition: all 0.4s ease;

    padding: 25px 0; /* 增加导航栏高度 */
    background: transparent;
}

.header-nav.scrolled {
    background: var(--color-primary); /* 使用主色调作为背景 */
    padding: 15px 0;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
    backdrop-filter: blur(10px);
}

.header-nav.scrolled .nav-link {
    color: var(--color-text-light); /* 滚动后保持白色字体 */
}

.header-nav.scrolled .search-button {
    color: var(--color-text-light);
}

/* 滚动时保持logo白色 */
.header-nav.scrolled .logo img {
    filter: brightness(0) invert(1);
}

/* 移动端logo滚动时也保持白色 */
.header-nav.scrolled .mobile-logo img {
    filter: brightness(0) invert(1);
}

.nav-container {
    width: 100%;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    padding: 0 30px;
}

/* 左侧Logo */
.logo {
    flex: 0 0 auto;
}

.logo img {
    height: 45px;
    transition: transform 0.3s ease;
    filter: brightness(0) invert(1);
}

.logo:hover img {
    transform: scale(1.05);
}

/* 中央导航区域 */
.nav-center {
    display: flex;
    gap: 35px;
    flex: 1;
    justify-content: center;
    align-items: center;
    margin: 0 30px;
}

/* 右侧功能区 */
.nav-right {
    display: flex;
    align-items: center;
    gap: 20px;
    flex: 0 0 auto;
}

.nav-item {
    position: relative;
}

.nav-link {
    color: var(--color-text-light); /* 默认白色字体 */
    text-decoration: none;
    font-weight: 500;
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    padding: 14px 18px; /* 增加导航链接的内边距 */
    font-size: 16px; /* 稍微增加字体大小 */
    white-space: nowrap;
    border-radius: 12px; /* 增加圆角效果 */
    position: relative;
    overflow: hidden;
    letter-spacing: 0.5px;
}

/* 添加渐变背景效果 */
.nav-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    transition: left 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    z-index: -1;
}

.nav-link:hover {
    background-color: var(--color-tech-blue);
    color: var(--color-text-light);
}

/* 滚动后的导航链接样式优化 */
.header-nav.scrolled .nav-link {
    color: var(--color-text-light);
}

.header-nav.scrolled .nav-link:hover {
    background-color: var(--color-primary);
    color: var(--color-text-light);
}

/* 激活状态样式 */
.nav-link.active {
    background-color: var(--color-tech-blue);
    color: var(--color-text-light);
}

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

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    min-width: 120px; /* 缩小下拉菜单宽度 */
    background: #FFFFFF;
    border-radius: 8px; /* 减小圆角 */
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1); /* 调整阴影效果 */
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    overflow: hidden;
    z-index: 100;
    margin-top: 10px; /* 减少下拉菜单与导航栏的距离 */
    padding: 8px 0; /* 添加内边距 */
}

/* 导航下拉菜单中的图标始终保持原色 */
.header-nav .fas {
    color: inherit;
}

.dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    margin-top: 10px;
}

.dropdown-item {
    display: flex;
    align-items: center;
    padding: 10px 20px; /* 减少下拉菜单项的内边距 */
    color: var(--color-text-dark);
    text-decoration: none;
    transition: all 0.3s ease;
    border-left: 2px solid transparent;
    font-size: 14px; /* 稍微减小字体大小 */
}

.dropdown-item:hover {
    background: rgba(0, 155, 123, 0.05);
    color: var(--color-primary);
    border-left-color: var(--color-primary);
}

/* 调整下拉菜单中的图标样式 */
.dropdown-item img {
    width: 20px;
    height: 20px;
    margin-right: 10px;
    border-radius: 2px; /* 为国旗图标添加微小的圆角 */
}


.search-button {
    background: none;
    border: none;
    color: var(--color-text-light);
    font-size: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 45px;
    height: 45px;
    border-radius: 50%;
    position: relative;
}

/* 语言切换下拉菜单 */
.lang-switch {
    position: relative;
}

.lang-switch .nav-link {
    padding: 12px 20px;
    font-size: 16px;
    white-space: nowrap;
}

/* 语言菜单的国旗图标样式 */
.lang-switch .dropdown-item i {
    width: 20px;
    margin-right: 8px;
    font-size: 14px;
}

.search-button:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--color-text-light);
}

/* 搜索弹窗样式 */
.search-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    visibility: hidden;
    opacity: 0;
    transition: all 0.3s ease;
}

.search-overlay.active {
    visibility: visible;
    opacity: 1;
}

.search-popup {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    max-width: 600px;
    width: 90%;
    max-height: 400px;
    overflow: hidden;
    transform: scale(0.8);
    transition: all 0.3s ease;
}

.search-overlay.active .search-popup {
    transform: scale(1);
}

.search-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 30px;
    background: var(--color-primary);
    color: white;
}

.search-header h3 {
    margin: 0;
    font-size: 20px;
    font-weight: 600;
}

.search-close {
    background: none;
    border: none;
    color: white;
    font-size: 24px;
    cursor: pointer;
    padding: 0;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.3s ease;
}

.search-close:hover {
    background: rgba(255, 255, 255, 0.2);
}

.search-content {
    padding: 30px;
}

.search-input-container {
    display: flex;
    gap: 15px;
    align-items: center;
}

.search-input {
    flex: 1;
    padding: 15px 20px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 16px;
    outline: none;
    transition: all 0.3s ease;
}

.search-input:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 155, 123, 0.1);
}

.search-submit {
    padding: 15px 25px;
    background: var(--color-primary);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.3s ease;
    white-space: nowrap;
}

.search-submit:hover {
    background: var(--color-dark-green);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 155, 123, 0.3);
}

.search-submit i {
    font-size: 14px;
}

/* 移动端适配 */
@media (max-width: 768px) {
    .search-popup {
        width: 95%;
        margin: 20px;
    }
    
    .search-header {
        padding: 15px 20px;
    }
    
    .search-content {
        padding: 20px;
    }
    
    .search-input-container {
        flex-direction: column;
        gap: 15px;
    }
    
    .search-input,
    .search-submit {
        width: 100%;
    }
}

/* 移动端专用导航布局 */
.mobile-nav-layout {
    display: none;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    padding: 0 20px;
}

.mobile-logo {
    flex: 0 0 auto;
}

.mobile-logo img {
    height: 35px;
    transition: transform 0.3s ease;
}

.mobile-search-button {
    background: none;
    border: none;
    color: var(--color-text-light);
    font-size: 20px;
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
    transition: all 0.3s ease;
    z-index: 1001;
}

.mobile-search-button:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: scale(1.1);
}

.header-nav.scrolled .mobile-search-button {
    color: var(--color-text-light);
}

/* 桌面端专用样式 */
.desktop-only {
    display: block;
}

/* 手机端菜单按钮样式调整 */
.mobile-menu-toggle {
    background: none;
    border: none;
    color: var(--color-text-light);
    font-size: 24px;
    cursor: pointer;
    padding: 8px;
    border-radius: 4px;
    transition: all 0.3s ease;
    z-index: 1001;
}

.mobile-menu-toggle:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: scale(1.05);
}

.header-nav.scrolled .mobile-menu-toggle {
    color: var(--color-text-light);
}

/* 桌面端移动菜单按钮（原有样式保持） */
.desktop-mobile-toggle {
    display: none;
    position: absolute;
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
}

/* 横幅Banner样式 */
.banner-section {
    position: relative;
    height: 100vh;
    overflow: hidden;
}

.banner-slider {
    height: 100%;
    position: relative;
}

.banner-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 1s ease;
    display: flex;
    align-items: center;
    background-size: cover;
    background-position: center;
}

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

.banner-content {
    max-width: 1450px;
    margin: 0 auto;
    padding: 0 30px;
    color: var(--color-text-light);
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    text-align: center; /* 让所有内容居中显示 */
}

.banner-title {
    font-size: 4rem;
    font-weight: 700;
    margin-bottom: 20px;
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease 0.3s;
}

.banner-desc {
    font-size: 1.5rem;
    max-width: 1000px;
    margin: 0 auto 30px; /* 左右自动调整外边距，实现居中 */
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease 0.5s;
}

.banner-btn {
    display: inline-block;
    background: var(--color-dark-green);
    color: var(--color-text-light);
    padding: 12px 30px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease 0.7s;
    box-shadow: 0 4px 15px rgba(255, 107, 53, 0.3);
}

.banner-btn:hover {
    background: var(--color-cta);
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(255, 107, 53, 0.4);
}

.banner-slide.active .banner-title,
.banner-slide.active .banner-desc,
.banner-slide.active .banner-btn {
    opacity: 1;
    transform: translateY(0);
}

.banner-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
  
}

.banner-controls {
    position: absolute;
    bottom: 50px;
    left: 0;
    right: 0;
    display: flex;
    justify-content: center;
    gap: 10px;
    z-index: 10;
}

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

.banner-dot.active {
    background: var(--color-dark-green);
    transform: scale(1.3);
}

.banner-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.2);
    color: var(--color-text-light);
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.3s ease;
    z-index: 10;
}

.banner-arrow:hover {
    background: var(--color-primary);
}

.banner-prev {
    left: 30px;
}

.banner-next {
    right: 30px;
}

/* 产品展示区样式 */
.product-section {
    padding: 100px 0;
    background: var(--color-light-bg);
    position: relative;
}

.section-title {
    text-align: center;
    margin-bottom: 60px;
    position: relative;
    padding-bottom: 15px;
    color: var(--color-primary);
    font-weight: 700;
    font-size: 2.5rem;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: var(--color-primary);
}

.section-subtitle {
    text-align: center;
    font-size: 1.1rem;
    color: var(--color-text-grey);
    margin: -40px auto 40px auto;
    max-width: 600px;
    line-height: 1.5;
    font-weight: 400;
    opacity: 0.9;
}

.product-container { 
    width:100%;   
    margin: 0 auto;
    position: relative;
}

.product-slider {
    position: relative;
    overflow: hidden;
    padding: 20px 60px;
}

.product-wrapper {
    display: flex;
    transition: transform 0.5s ease;
}

.product-card {
    flex: 0 0 25%;
    padding: 15px;
    transition: all 0.3s ease;
}

.product-inner {
    background: #FFFFFF;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.product-inner:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
}

.product-image {
    position: relative;
    padding-top: 75%;
    background: var(--color-warm-bg);
    overflow: hidden;
}

.product-image img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: all 0.5s ease;
}

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

.product-info {
    padding: 25px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.product-title {
    font-size: 1.2rem;
    margin-bottom: 10px;
    color: var(--color-text-dark);
    font-weight: 600;
    position: relative;
    padding-bottom: 10px;
}

.product-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 2px;
    background: var(--color-dark-green);
    transition: width 0.3s ease;
}

.product-inner:hover .product-title::after {
    width: 60px;
}

.product-specs {
    margin: 15px 0;
}

.product-spec {
    display: flex;
    align-items: center;
    margin-bottom: 8px;
    color: var(--color-text-grey);
    font-size: 0.9rem;
}

.product-spec i {
    margin-right: 8px;
    color: var(--color-dark-green);
}

.product-btn {
    display: inline-block;
    background: linear-gradient(to right, var(--color-primary), var(--color-dark-green));
    color: #FFFFFF;
    padding: 10px 20px;
    border-radius: 30px;
    text-decoration: none;
    text-align: center;
    font-weight: 500;
    transition: all 0.3s ease;
    margin-top: 20px;
}

.product-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0, 155, 123, 0.3);
}

.product-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: #FFFFFF;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    cursor: pointer;
    transition: all 0.3s ease;
    z-index: 10;
    color: var(--color-text-dark);
    font-size: 16px;
}

.product-arrow:hover {
    background: var(--color-primary);
    color: #FFFFFF;
}

.product-prev {
    left: 15px;
}

.product-next {
    right: 15px;
}

/* 营销网络样式已删除 */

/* 页脚样式 */
.footer {
    background: var(--color-primary);
    color: #FFFFFF;
    padding: 80px 0 0;
    position: relative;
    overflow: hidden;
}

.footer-container {
    margin: 0 auto;
    padding: 0 30px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.footer-logo {
    margin-bottom: 20px;
    display: inline-block;
	filter: brightness(0) invert(1);
}

.footer-logo img {
    height: 50px;
}

.footer-widget {
    margin-bottom: 40px;
}

.footer-title {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 25px;
    position: relative;
    padding-bottom: 10px;
}

.footer-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 2px;
    background: var(--color-text-light);
}

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

.footer-link {
    margin-bottom: 12px;
}

.footer-link a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
}

.footer-link a:hover {
    color: #FFFFFF;
    transform: translateX(5px);
}

.footer-link a i {
    margin-right: 10px;
    font-size: 12px;
}

.footer-contact li {
    margin-bottom: 15px;
    display: flex;
    align-items: flex-start;
    color: rgba(255, 255, 255, 0.8);
}

.footer-contact i {
    margin-right: 15px;
    font-size: 18px;
    color: #FFFFFF;
    min-width: 20px;
}

.qr-container {
    display: flex;
    gap: 20px;
}

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

.qr-item img {
    width: 100px;
    height: 100px;
    border-radius: 8px;
    margin-bottom: 8px;
}

.qr-label {
    font-size: 0.9rem;
}

.copyright {
    background: var(--color-primary);
    padding: 20px 0;
    text-align: center;
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.9rem;
    margin-top: 40px;
    border-top: 1px solid #FFFFFF;
}

.copyright a{   
    color: var(--color-text-white); text-decoration:none;   
}

/* 响应式样式 */
/* 笔记本分辨率适配 */
@media (min-width: 1201px) and (max-width: 1366px) {
    .footer-container {
        display: flex;
        flex-wrap: wrap;
        justify-content: space-between;
        gap: 20px;
    }

    .footer-widget {
        flex: 0 0 calc(25% - 15px);
        max-width: calc(25% - 15px);
    }

    .footer-title {
        font-size: 1.1rem;
    }

    .footer-link a,
    .footer-contact li {
        font-size: 0.9rem;
    }

    .qr-container {
        flex-direction: row;
        justify-content: space-between;
    }

    .qr-item {
        flex: 0 0 calc(50% - 10px);
    }

    .qr-item img {
        width: 80px;
        height: 80px;
    }
}

@media (max-width: 1200px) {
    .product-card {
        flex: 0 0 33.333%;
    }
}

@media (max-width: 992px) {
    .nav-container {
        padding: 0;
    }

    /* 隐藏桌面端导航元素 */
    .logo.desktop-only,
    .search-button.desktop-only,
    .nav-center,
    .nav-right {
        display: none;
    }

    /* 显示移动端专用导航 */
    .mobile-nav-layout {
        display: flex;
    }

    .desktop-mobile-toggle {
        display: block;
    }

    .product-card {
        flex: 0 0 50%;
    }

    .banner-title {
        font-size: 3rem;
    }

    .banner-desc {
        font-size: 1.2rem;
    }
}

@media (max-width: 768px) {
    .product-card {
        flex: 0 0 100%;
    }

    .banner-title {
        font-size: 2.5rem;
    }

    .banner-controls {
        bottom: 20px;
    }

    .banner-arrow {
        width: 40px;
        height: 40px;
    }

    .banner-prev {
        left: 10px;
    }

    .banner-next {
        right: 10px;
    }

    .footer-container {
        grid-template-columns: 1fr;
    }
}

/* 移动端导航菜单 */
.mobile-menu {
    position: fixed;
    top: 0;
    right: -300px;
    width: 300px;
    height: 100vh;
    background: var(--color-primary);
    z-index: 1000;
    padding: 80px 30px 30px;
    transition: right 0.4s ease;
    overflow-y: auto;
    box-shadow: -5px 0 30px rgba(0, 0, 0, 0.3);
}

.mobile-menu.active {
    right: 0;
}

.mobile-nav-item {
    margin-bottom: 5px;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.mobile-nav-item:last-child {
    border-bottom: none;
}

.mobile-nav-link {
    color: var(--color-text-light);
    text-decoration: none;
    font-weight: 500;
    font-size: 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
    transition: all 0.3s ease;
}

.mobile-nav-link:hover {
    color: var(--color-text-light);
    background: var(--color-primary);
    padding-left: 10px;
}

/* 移动端适配优化 */
@media (max-width: 768px) {
    .mobile-nav-layout {
        padding: 0 15px;
    }
    
    .mobile-logo img {
        height: 32px;
    }
    
    .mobile-search-button,
    .mobile-menu-toggle {
        font-size: 18px;
        padding: 6px;
    }
    
    .mobile-menu {
        width: 280px;
    }
}

@media (max-width: 480px) {
    .mobile-menu {
        width: 100%;
        right: -100%;
        padding: 70px 20px 20px;
    }
}

.overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    backdrop-filter: blur(3px);
    -webkit-backdrop-filter: blur(3px);
}

.overlay.active {
    opacity: 1;
    visibility: visible;
}

/* 营销网络新布局样式 */
.network-content {
    display: flex;
    flex-wrap: wrap;
    margin-top: 50px;
    gap: 30px;
    align-items: stretch;
}

/* 左侧地图区域 - 70% */
.map-area {
    flex: 1 1 65%;
    min-width: 300px;
}

/* 右侧统计区域 - 30% */
.stats-area {
    flex: 1 1 25%;
    min-width: 280px;
    display: flex;
    align-items: center;
}

.network-stats {
    width: 100%;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.stat-card {
    background: linear-gradient(145deg, var(--color-primary), var(--color-dark-green));
    color: var(--color-text-light);
    padding: 25px 20px;
    border-radius: var(--border-radius);
    text-align: center;
    box-shadow: 0 10px 20px rgba(0, 155, 123, 0.2);
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
    cursor: pointer;
}

/* 闪光扫过效果 */
.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -150%;
    width: 80%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transform: skewX(-25deg);
    transition: left 0.8s ease;
}

/* 底部边框效果 */
.stat-card::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 3px;
    background: #ffffff;
    transform: translateX(-50%);
    transition: width 0.4s ease;
}

/* 悬停状态 */
.stat-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 20px 40px rgba(0, 155, 123, 0.4);
    background: linear-gradient(145deg, var(--color-dark-green), var(--color-primary));
}

/* 闪光效果动画 */
.stat-card:hover::before {
    left: 150%;
}

/* 底部边框展开 */
.stat-card:hover::after {
    width: 80%;
}

/* 文字放大效果 */
.stat-card:hover h3 {
    transform: scale(1.1);
    text-shadow: 0 0 10px rgba(255, 255, 255, 0.5);
}

/* 文字上移效果 */
.stat-card:hover p {
    transform: translateY(-3px);
    font-weight: 500;
}

.stat-card h3 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 10px;
    background: linear-gradient(to right, #ffffff, #e0f7f1);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: none;
    transition: transform 0.3s ease;
}

.stat-card p {
    font-size: 1rem;
    opacity: 0.9;
    margin: 0;
    transition: transform 0.3s ease;
}

/* 营销网络响应式适配 */
@media (max-width: 992px) {
    .network-content {
        flex-direction: column;
    }
    
    .map-area, .stats-area {
        width: 100%;
        min-width: auto;
    }
    
    .network-stats {
        margin-top: 30px;
    }
}

@media (max-width: 768px) {
    .network-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
    }
    
    .stat-card:hover {
        transform: translateY(-5px) scale(1.01);
    }
}

@media (max-width: 480px) {
    .network-stats {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .stat-card {
        padding: 20px 15px;
    }
    
    .stat-card h3 {
        font-size: 2rem;
    }
}

/* ========================= 行业解决方案样式 ========================= */
.industry-section {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 60px 0;  /* 增加上下内边距 */
    margin-bottom: 60px;  /* 增加底部外边距 */
    overflow: hidden;
    position: relative;
}

.industry-section .container {
    width: 100%;
    max-width: none;
    padding: 0;
}



.industry-cards-container {
    display: flex;
    width: 100%;
    height: 80vh; /* 减少高度，从100vh改为80vh */
    margin-top: 60px; /* 增加上边距，确保在副标题下方显示 */
}

.industry-card {
    flex: 1;
    height: 80vh; /* 减少高度，与容器高度保持一致 */
    position: relative;
    cursor: pointer;
    transition: all 0.6s cubic-bezier(0.23, 1, 0.320, 1);
    overflow: hidden;
}

.industry-card-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-size: cover;
    background-position: center;
    transition: all 0.8s ease;
    transform: scale(1.1);
    z-index: 0;
}

.industry-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to bottom, 
        rgba(0,0,0,0.3) 0%,
        rgba(0,0,0,0.7) 100%);
    transition: all 0.6s ease;
    z-index: 1;
}

/* 鼠标悬停时调整图片叠加层透明度 */
.industry-card:hover::before {
    background: linear-gradient(to bottom, 
        rgba(0,0,0,0.2) 0%,
        rgba(0,0,0,0.5) 100%);
}

.industry-card:hover .industry-card-bg {
    transform: scale(1.2);
}

/* 前面已添加悬停效果，此处移除重复代码 */

.industry-card:hover {
    flex: 3;
    transform: scale(1.02);
    box-shadow: 0 20px 40px rgba(0,0,0,0.3);
}

.industry-card-front,
.industry-card-back {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    padding: 40px 30px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    color: white;
    transition: all 0.6s ease;
    z-index: 2;
    text-shadow: 0 2px 5px rgba(0,0,0,0.7); /* 增强文字阴影，提高可读性 */
}

.industry-card-front {
    opacity: 1;
    transform: translateY(0);
}

.industry-card-back {
    opacity: 0;
    transform: translateY(20px);
    justify-content: flex-start;
    padding-top: 200px;
}

.industry-card:hover .industry-card-front {
    opacity: 0;
    transform: translateY(-20px);
}

.industry-card:hover .industry-card-back {
    opacity: 1;
    transform: translateY(0);
}

.industry-card-number {
    font-size: 5rem;
    font-weight: 900;
    margin: 0 0 20px 0;
    text-shadow: 3px 3px 6px rgba(0,0,0,0.5);
    background: linear-gradient(45deg, #fff, rgba(255,255,255,0.8));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
    z-index: 5;
}

.industry-card-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin: 0 0 15px 0;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
    line-height: 1.2;
}

.industry-card-subtitle {
    font-size: 1.2rem;
    font-weight: 300;
    margin: 0;
    opacity: 0.9;
    font-style: italic;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.industry-card-desc {
    font-size: 1.1rem;
    line-height: 1.6;
    margin: 0;
    text-align: justify;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.3);
    max-height: 60vh;
    overflow-y: auto;
    padding-right: 15px;
}

.industry-card-desc::-webkit-scrollbar {
    width: 4px;
}

.industry-card-desc::-webkit-scrollbar-track {
    background: rgba(255,255,255,0.1);
    border-radius: 2px;
}

.industry-card-desc::-webkit-scrollbar-thumb {
    background: rgba(255,255,255,0.3);
    border-radius: 2px;
}

.industry-card-desc::-webkit-scrollbar-thumb:hover {
    background: rgba(255,255,255,0.5);
}

/* 添加行业卡片按钮样式 */
.industry-card-btn {
    display: block;
    width: 140px;
    margin: 20px auto 0;
    padding: 10px 20px;
    background: linear-gradient(to right, var(--color-primary), var(--color-dark-green));
    color: #FFFFFF;
    text-decoration: none;
    text-align: center;
    border-radius: 30px;
    font-weight: 500;
    font-size: 0.95rem;
    transition: all 0.4s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

.industry-card-btn:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.5);
    background: linear-gradient(to right, var(--color-dark-green), var(--color-primary));
}

/* 行业解决方案箭头样式 */
.industry-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 50px;
    height: 50px;
    background: rgba(255, 255, 255, 0.9);
    border: none;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 10;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    color: var(--color-primary);
    font-size: 18px;
}

.industry-arrow:hover {
    background: var(--color-primary);
    color: white;
    transform: translateY(-50%) scale(1.1);
    box-shadow: 0 6px 20px rgba(0, 155, 123, 0.4);
}

.industry-prev {
    left: 20px;
}

.industry-next {
    right: 20px;
}

/* 桌面端隐藏箭头 */
.mobile-only {
    display: none;
}

/* 响应式设计 */
@media (max-width: 1200px) {
    
    .industry-card-number {
        font-size: 4rem;
    }
    
    .industry-card-title {
        font-size: 2rem;
    }
}

@media (max-width: 768px) {
    /* 手机端显示箭头 */
    .mobile-only {
        display: flex;
    }
    
    /* 手机端行业卡片容器调整 */
    .industry-cards-container {
        flex-direction: row;
        height: 60vh;
        overflow: hidden;
        position: relative;
        margin-top: 30px;
    }
    
    /* 手机端只显示一个卡片 */
    .industry-card {
        min-width: 100%;
        height: 60vh;
        flex: none;
        transition: transform 0.4s ease;
        opacity: 1;
    }
    
    .industry-card:hover {
        flex: none;
        height: 60vh;
        transform: none;
    }
    
    /* 手机端字体调整 */
    .industry-card-number {
        font-size: 3rem;
    }
    
    .industry-card-title {
        font-size: 1.5rem;
    }
    
    .industry-card-subtitle {
        font-size: 1rem;
    }
    
    .industry-card-back {
        padding-top: 80px;
    }
    
    .industry-card-desc {
        font-size: 1rem;
        max-height: 150px;
    }
    
    /* 手机端箭头位置调整 */
    .industry-arrow {
        width: 40px;
        height: 40px;
        font-size: 16px;
    }
    
    .industry-prev {
        left: 10px;
    }
    
    .industry-next {
        right: 10px;
    }
}

.video-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.8));
    color: white;
    padding: 30px 25px 20px;
    transform: translateY(100%);
    transition: transform 0.3s ease;
}

.video-preview:hover .video-overlay {
    transform: translateY(0);
}

.video-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 5px;
}

.video-duration {
    font-size: 0.9rem;
    opacity: 0.8;
}

.company-video {
    width: 100%;
    height: 100%;
    border-radius: 20px;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .about-content {
        flex-direction: column;
        gap: 40px;
        text-align: center;
    }
    
    .about-text {
        padding-right: 0;
    }
    
    .about-title {
        font-size: 2.3rem;
    }
    
    .about-cta {
        justify-content: center;
    }
    
    .about-highlights {
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: center;
        gap: 15px;
    }
    
    .highlight-item {
        min-width: 280px;
        margin: 0;
    }
}

@media (max-width: 768px) {
    .about-section {
        padding: 60px 0;
    }
    
    .about-container {
        padding: 0 20px;
    }
    
    .about-title {
        font-size: 2rem;
    }
    
    .about-subtitle {
        font-size: 1.1rem;
    }
    
    .about-paragraph {
        font-size: 1rem;
    }
    
    .about-highlights {
        flex-direction: column;
    }
    
    .about-cta {
        flex-direction: column;
        align-items: center;
        gap: 15px;
    }
    
    .about-btn,
    .about-btn-outline {
        width: 200px;
        text-align: center;
    }
    
    .play-button {
        width: 60px;
        height: 60px;
    }
    
    .play-icon {
        font-size: 20px;
    }
    
    .play-ripple {
        width: 60px;
        height: 60px;
    }
}

@media (max-width: 480px) {
    .about-content {
        gap: 30px;
    }
    
    .about-highlights {
        flex-direction: column;
        gap: 15px;
    }
    
    .highlight-item {
        flex-direction: column;
        text-align: center;
        align-items: center;
    }
    
    .highlight-icon {
        margin-right: 0;
        margin-bottom: 15px;
    }
}

/* ========================= 返回顶部按钮样式 ========================= */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-dark-green));
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.4s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    z-index: 999;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(50, 190, 255, 0.4);
    background: linear-gradient(135deg, var(--color-dark-green), var(--color-primary));
}

.back-to-top i {
    font-size: 20px;
    transition: transform 0.3s ease;
}

.back-to-top:hover i {
    transform: translateY(-3px);
}

/* 返回顶部按钮响应式设计 */
@media (max-width: 768px) {
    .back-to-top {
        width: 45px;
        height: 45px;
        bottom: 20px;
        right: 20px;
    }
    
    .back-to-top i {
        font-size: 18px;
    }
}

@media (max-width: 480px) {
    .back-to-top {
        width: 40px;
        height: 40px;
        bottom: 15px;
        right: 15px;
    }
    
.back-to-top i {
    font-size: 16px;
}
}

/* 视频部分样式 */
.video-section {
    padding: 80px 0;
    background: linear-gradient(135deg, var(--color-light-bg) 0%, var(--bg-white) 100%);
    text-align: center;
}

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

.video-wrapper {
    position: relative;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
    background: var(--color-primary);
}

.video-wrapper video {
    width: 100%;
    height: auto;
    display: block;
    transition: all 0.3s ease;
}

.play-btn {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80px;
    height: 80px;
    background: rgba(50, 190, 255, 0.9);
    border: none;
    border-radius: 50%;
    color: white;
    font-size: 24px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    z-index: 10;
    box-shadow: 0 8px 25px rgba(50, 190, 255, 0.3);
}

.play-btn:hover {
    background: var(--color-primary);
    transform: translate(-50%, -50%) scale(1.1);
    box-shadow: 0 12px 30px rgba(50, 190, 255, 0.4);
}

.play-btn.playing {
    opacity: 0;
    visibility: hidden;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .video-section {
        padding: 60px 0;
    }
    
    .video-wrapper {
        border-radius: 15px;
    }
    
    .play-btn {
        width: 60px;
        height: 60px;
        font-size: 20px;
    }
}

@media (max-width: 480px) {
    .video-section {
        padding: 40px 0;
    }
    
    .video-wrapper {
        border-radius: 12px;
    }
    
    .play-btn {
        width: 50px;
        height: 50px;
        font-size: 18px;
    }
}