/* Windows 11 风格变量 */
:root {
    --primary-color: #0078d4; /* Windows 蓝 */
    --secondary-color: #5d5aec; /* 紫蓝色 */
    --accent-color: #ffb900; /* Windows 黄 */
    --dark-bg: #1d1d1d; /* 深色背景 */
    --card-bg: #f3f3f3; /* 卡片背景 */
    --surface-color: #ffffff; /* 表面颜色 */
    --text-primary: #000000; /* 主要文字 */
    --text-secondary: #616161; /* 次要文字 */
    --border-radius: 8px; /* Windows 11 圆角 */
    --border-radius-lg: 12px; /* 大圆角 */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 28px rgba(0, 0, 0, 0.16);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 基础重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
}

body {
    line-height: 1.6;
    color: var(--text-primary);
    background-color: #fafafa;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

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

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 24px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    transition: var(--transition);
    gap: 8px;
}

.btn:hover {
    background-color: #106ebe;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-outline {
    background-color: transparent;
    border: 1px solid var(--primary-color);
    color: var(--primary-color);
}

.btn-outline:hover {
    background-color: rgba(0, 120, 212, 0.1);
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
    text-align: center;
    font-weight: 600;
}

.section-subtitle {
    color: var(--text-secondary);
    text-align: center;
    max-width: 900px;
    margin: 0 auto 3rem;
    font-size: 1.1rem;
    line-height: 1.7;
}

/* Windows 11 风格头部导航 */
header {
    background-color: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    transition: var(--transition);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 1px;
    position: relative;
	
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    color: var(--primary-color);
    font-size: 2rem;
}

.logo-text h1 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.logo-text p {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* 移动端菜单按钮 - 显示☰符号，仅手机端可见 */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.8rem;
    cursor: pointer;
    color: var(--primary-color);
    width: 48px;
    height: 48px;
    border-radius: var(--border-radius);
    transition: var(--transition);
    align-items: center;
    justify-content: center;
    z-index: 1001;
}

.mobile-menu-btn:hover {
    background-color: rgba(0, 0, 0, 0.05);
}

/* 桌面导航 - 核心：手机端默认隐藏，点击按钮展开，复用原样式 */
.desktop-nav {
    transition: var(--transition);
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    gap: 20px;
}

.nav-links {
    display: flex;
    gap: 32px;
    align-items: center;
}

.nav-item {
    position: relative;
}

.nav-link {
    font-weight: 500;
    transition: var(--transition);
    position: relative;
    padding: 8px 0;
    display: block;
}

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

/* 下划线动画效果 - 完全保留 */
.nav-underline {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: width 0.3s ease;
}

.nav-item:hover .nav-underline {
    width: 100%;
}

/* 产品中心下拉菜单样式 */
.nav-item.dropdown {
    position: relative;
}

.nav-item.dropdown .nav-link {
    display: flex;
    align-items: center;
    gap: 6px;
}

.dropdown-icon {
    font-size: 0.75rem;
    transition: transform 0.3s;
}

.nav-item.dropdown:hover .dropdown-icon {
    transform: rotate(180deg);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 240px;
    background: white;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    padding: 8px 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    z-index: 1001;
    border: 1px solid rgba(0, 0, 0, 0.08);
}

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

.dropdown-item {
    display: block;
    position: relative;
}

.dropdown-item > a,
.dropdown-item.all-products {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    padding: 10px 20px;
    color: var(--text-secondary);
    transition: var(--transition);
    font-size: 0.95rem;
    gap: 10px;
}

.dropdown-item > a i:first-child,
.dropdown-item.all-products i:first-child {
    width: 20px;
    color: var(--primary-color);
}

.dropdown-item > a:hover,
.dropdown-item.all-products:hover {
    background-color: rgba(0, 120, 212, 0.05);
    color: var(--primary-color);
}

.dropdown-item.has-submenu {
    position: relative;
}

.submenu-icon {
    font-size: 0.7rem;
    margin-left: auto;
    color: var(--text-secondary);
}

.submenu {
    position: absolute;
    top: 0;
    left: 100%;
    min-width: 200px;
    background: white;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    padding: 8px 0;
    opacity: 0;
    visibility: hidden;
    transform: translateX(-10px);
    transition: all 0.3s ease;
    z-index: 1002;
    border: 1px solid rgba(0, 0, 0, 0.08);
}

.dropdown-item.has-submenu:hover .submenu {
    opacity: 1;
    visibility: visible;
    transform: translateX(0);
}

.submenu-item {
    display: flex;
    align-items: center;
    padding: 8px 20px;
    color: var(--text-secondary);
    transition: var(--transition);
    font-size: 0.9rem;
    gap: 10px;
}

.submenu-item i {
    width: 18px;
    font-size: 0.8rem;
    color: var(--primary-color);
}

.submenu-item:hover {
    background-color: rgba(0, 120, 212, 0.05);
    color: var(--primary-color);
    padding-left: 25px;
}

/* 语言选择器样式 - 放在导航右侧 */
.lang-selector {
    position: relative;
}

.lang-selector select {
    padding: 6px 12px;
    border-radius: var(--border-radius);
    border: 1px solid rgba(0, 0, 0, 0.2);
    background-color: transparent;
    font-size: 0.9rem;
    cursor: pointer;
    outline: none;
    transition: var(--transition);
}

.lang-selector select:hover {
    border-color: var(--primary-color);
}

/* 幻灯片 - 与头部菜单间距为0 */
.hero {
    margin-top: 0;
    position: relative;
    height: 700px;
    overflow: hidden;
}

.slideshow {
    margin-top: 0;
    height: 100%;
    position: relative;
}

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

.slide.active {
    opacity: 1;
}

.slide-content {
    background-color: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    color: var(--text-primary);
    padding: 40px;
    max-width: 600px;
    margin-left: 10%;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
}

.slide-content h2 {
    font-size: 2.5rem;
    margin-bottom: 15px;
    color: var(--primary-color);
}

.slide-content p {
    font-size: 1.2rem;
    margin-bottom: 25px;
    color: var(--text-secondary);
}

.slide-indicators {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 12px;
}

.indicator {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.5);
    cursor: pointer;
    transition: var(--transition);
}

.indicator.active {
    background-color: var(--primary-color);
    transform: scale(1.3);
}

/* 主要内容区 */
section {
    padding: 100px 0;
}

.about {
    background-color: white;
}

.about-content {
    display: flex;
    align-items: center;
    gap: 60px;
}

.about-img {
    flex: 1;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.about-img img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.5s ease;
}

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

.about-text {
    flex: 1;
}

.about-text h3 {
    font-size: 1.8rem;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.about-text p {
    margin-bottom: 20px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* 产品展示 */
.products {
    background-color: #f8f8f8;
}

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

.product-card {
    background-color: var(--surface-color);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.product-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.product-img {
    width: 100%;
   width: 300px;
    overflow: hidden;
	margin: 0 auto;
}

.product-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

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

.product-info-in {
    padding: 24px;
}

.product-info-in h3 {
    font-size: 1.3rem;
    margin-bottom: 10px;
    color: var(--primary-color);
    text-align: center;
}

.product-info-in p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
    text-align: center;
}

/* 公司信息 */
.company-info {
    background-color: white;
}

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

.info-card {
    background-color: var(--surface-color);
    padding: 32px 24px;
    border-radius: var(--border-radius-lg);
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.info-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-color);
}

.info-card img {
    width: 60px;
    height: 60px;
    margin-bottom: 20px;
}

.info-card h3 {
    font-size: 1.3rem;
    margin-bottom: 15px;
    color: var(--primary-color);
}

.info-card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* 页脚 */
footer {
    background-color: var(--dark-bg);
    color: white;
    padding: 80px 0 30px;
}

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

.footer-logo h2 {
    font-size: 1.8rem;
    margin-bottom: 15px;
    color: white;
}

.footer-logo p {
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.6;
    margin-bottom: 10px;
}

.footer-links h3, .footer-contact h3 {
    font-size: 1.3rem;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 10px;
    color: white;
}

.footer-links h3:after, .footer-contact h3:after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 40px;
    height: 3px;
    background-color: var(--accent-color);
}

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

.footer-links ul li a {
    color: rgba(255, 255, 255, 0.7);
    transition: var(--transition);
    display: inline-block;
}

.footer-links ul li a:hover {
    color: var(--accent-color);
    transform: translateX(5px);
}

.footer-contact p {
    margin-bottom: 15px;
    display: flex;
    align-items: flex-start;
    color: rgba(255, 255, 255, 0.7);
}

.footer-contact img {
    margin-right: 12px;
    width: 20px;
    height: 20px;
 /*   filter: brightness(0) invert(1);
    opacity: 0.8;*/
}

.copyright {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.5);
}

/* 公司新闻部分 */
.news-section {
    background-color: white;
    padding: 100px 0;
}

.news-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    max-width: 1000px;
    margin: 0 auto 50px;
}

.news-column {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.news-item {
    padding-bottom: 20px;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    transition: var(--transition);
}

.news-item:hover {
    border-bottom-color: var(--primary-color);
}

.news-date {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
    margin-bottom: 8px;
}

.news-title {
    font-size: 1.2rem;
    color: var(--text-primary);
    font-weight: 600;
    transition: var(--transition);
}

.news-title a:hover {
    color: var(--primary-color);
}

.news-view-all {
    text-align: center;
    margin-top: 40px;
}

/* 首页index背景 */
.about {
    background-color: #ffffff;
}

.products {
    background-color: #f0f7ff;
}

.news-section {
    background-color: #ffffff;
}

.company-info {
    background-color: #f0f7ff;
}

/* 响应式设计 - 核心适配：768px以下手机端 */
@media (max-width: 992px) {
    .section-title {
        font-size: 2.2rem;
    }
    .slide-content {
        margin-left: 5%;
        padding: 30px;
    }
    .slide-content h2 {
        font-size: 2rem;
    }
    .about-content {
        gap: 40px;
    }
    /* 平板端缩小导航间距 */
    .nav-links {
        gap: 20px;
    }
    .logo-text h1 {
        font-size: 1.4rem;
    }
}

@media (max-width: 768px) {
    /* 手机端显示☰菜单按钮 */
    .mobile-menu-btn {
        display: flex;
    }
    /* 手机端导航默认隐藏，绝对定位铺满右侧，点击按钮添加active类展开 */
    .desktop-nav {
        position: absolute;
        top: 100%;
        right: 0;
        width: 280px;
        background-color: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        box-shadow: var(--shadow-lg);
        border-radius: 0 0 var(--border-radius-lg) var(--border-radius-lg);
        padding: 20px;
        transform: translateY(-20px);
        opacity: 0;
        visibility: hidden;
        z-index: 1000;
        flex-direction: column;
        align-items: flex-start;
        gap: 20px;
    }
    /* 导航展开样式 */
    .desktop-nav.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    /* 手机端导航纵向排列 */
    .nav-links {
        flex-direction: column;
        gap: 16px;
        align-items: flex-start;
        width: 100%;
    }
    .nav-link {
        font-size: 1.1rem;
        padding: 10px 0;
        width: 100%;
    }
    /* 下拉菜单移动端样式 */
    .dropdown-menu {
        position: static;
        box-shadow: none;
        padding-left: 20px;
        opacity: 1;
        visibility: visible;
        transform: none;
        display: none;
        background: transparent;
        border: none;
    }
    .nav-item.dropdown:hover .dropdown-menu {
        display: block;
    }
    .submenu {
        position: static;
        box-shadow: none;
        padding-left: 20px;
        opacity: 1;
        visibility: visible;
        transform: none;
        display: none;
    }
    .dropdown-item.has-submenu:hover .submenu {
        display: block;
    }
    .lang-selector {
        width: 100%;
        margin-top: 10px;
    }
    .lang-selector select {
        width: 100%;
    }
    /* 手机端幻灯片适配 */
    .hero {
        height: 500px;
    }
    .slide-content {
        margin: 0 5%;
        padding: 30px;
    }
    .slide-content h2 {
        font-size: 1.8rem;
    }
    .about-content {
        flex-direction: column;
    }
    .about-img, .about-text {
        width: 100%;
    }
    section {
        padding: 80px 0;
    }
    /* 手机端logo优化 */
    .logo-icon {
        font-size: 1.6rem;
    }
    .logo-text h1 {
        font-size: 1.2rem;
    }
    .header-container {
        padding: 8px 15px;
    }
    .news-container {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}

@media (max-width: 576px) {
    .section-title {
        font-size: 1.8rem;
    }
    .hero {
        height: 450px;
    }
    .slide-content {
        padding: 20px;
    }
    .slide-content h2 {
        font-size: 1.5rem;
    }
    .slide-content p {
        font-size: 1rem;
    }
    .btn {
        padding: 10px 20px;
        font-size: 13px;
    }
    .product-grid {
        grid-template-columns: 1fr;
    }
    /* 小屏手机导航宽度铺满 */
    .desktop-nav {
        width: 100%;
        border-radius: 0;
    }
    /* 小屏logo隐藏小字 */
    .logo-text p {
        display: none;
    }
    .news-title {
        font-size: 1.1rem;
    }
    .news-item {
        padding-bottom: 20px;
    }
}
	
	
	
	/* 为底部语言模块添加样式，匹配 Windows 11 风格 */
.footer-lang {
    margin-top: 0;
}
.footer-lang h3 {
    font-size: 1.3rem;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 10px;
    color: white;
}
.footer-lang h3:after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 40px;
    height: 3px;
    background-color: var(--accent-color, #ffb900);
}
.lang-links {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    max-width: 400px;
}
.lang-link {
    display: inline-block;
    padding: 6px 14px;
    background-color: rgba(255, 255, 255, 0.08);
    border-radius: 30px;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.8);
    transition: var(--transition, all 0.3s ease);
    text-decoration: none;
    border: 1px solid rgba(255, 255, 255, 0.1);
}
.lang-link:hover {
    background-color: var(--primary-color, #0078d4);
    color: white;
    transform: translateY(-2px);
    border-color: transparent;
}
.lang-link.active-lang {
    background-color: var(--primary-color, #0078d4);
    color: white;
    border-color: transparent;
    font-weight: 500;
}
/* 移动端适配 */
@media (max-width: 768px) {
    .lang-links {
        gap: 10px;
    }
    .lang-link {
        padding: 5px 12px;
        font-size: 0.8rem;
    }
}
/* 响应式网格调整，确保footer-content在手机上自动换行 */
@media (max-width: 992px) {
    .footer-content {
        grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
        gap: 40px;
    }
}