/* ===================================
   深圳市新绿电子有限公司 - 现代化样式
   【桌面端优先】 + 移动端响应式适配
   =================================== */

/* ==================== CSS变量 ==================== */
:root {
    /* 主色调 */
    --primary-color: #1a73e8;
    --primary-dark: #1557b0;
    --primary-light: #e8f0fe;
    --secondary-color: #34a853;
    --accent-color: #ea4335;
    
    /* 文字颜色 */
    --text-primary: #202124;
    --text-secondary: #5f6368;
    --text-light: #80868b;
    
    /* 背景色 */
    --bg-light: #f8f9fa;
    --bg-white: #ffffff;
    --bg-dark: #1a1a1a;
    
    /* 边框与阴影 */
    --border-color: #dadce0;
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.12);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.15);
    --shadow-hover: 0 12px 40px rgba(0,0,0,0.18);
    
    /* 圆角 */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    
    /* 过渡动画 */
    --transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.25s ease;
}

/* ==================== 全局基础重置 ==================== */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 18px;  /* 桌面端基准字号 */
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
    color: var(--text-primary);
    line-height: 1.7;
    background: var(--bg-white);
    overflow-x: hidden;
    min-width: 320px;
}

/* ==================== 排版系统 ==================== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.25;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

h1 { 
    font-size: clamp(2rem, 4vw, 3.5rem); 
    margin-bottom: 1.2rem;
}
h2 { 
    font-size: clamp(1.75rem, 3vw, 2.75rem); 
    margin-bottom: 1rem;
}
h3 { 
    font-size: clamp(1.25rem, 2vw, 1.85rem); 
    margin-bottom: 0.8rem;
}
h4 {
    font-size: 1.3rem;
}

p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
    line-height: 1.8;
    font-size: 1.05rem;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition-fast);
}

a:hover {
    color: var(--primary-dark);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

ul, ol {
    list-style: none;
}

/* ==================== 布局容器系统 ==================== */

/* 标准内容容器 */
.container {
    width: 100%;
    max-width: 1320px;  /* 大屏友好 */
    margin: 0 auto;
    padding: 0 40px;   /* 桌面端宽松内边距 */
}

/* 宽屏容器（产品展示等）*/
.container-wide {
    width: 100%;
    max-width: 1500px;  /* 超宽屏支持 */
    margin: 0 auto;
    padding: 0 50px;
}

/* 超宽容器（Hero Banner等）*/
.container-fluid {
    width: 100%;
    padding: 0 60px;
}

/* ==================== 头部导航栏（桌面端） ==================== */
.header {
    background: rgba(255,255,255,0.97);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 2px 20px rgba(0,0,0,0.06);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid rgba(0,0,0,0.05);
}

/* 顶部信息栏 */
.top-bar {
    background: linear-gradient(135deg, var(--primary-color) 0%, #1565c0 100%);
    color: white;
    padding: 10px 0;
    font-size: 0.9rem;
    letter-spacing: 0.3px;
}

.top-bar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.top-bar a {
    color: white;
    margin-left: 30px;
    font-weight: 600;        /* 加粗增强对比 */
    color: #ffffff;
    transition: var(--transition-fast);
    text-shadow: 0 1px 4px rgba(0,0,0,0.2);
}

.top-bar a:hover {
    opacity: 1;
    text-shadow: 0 0 10px rgba(255,255,255,0.5);
}

/* 主导航区域 */
.nav-wrapper {
    padding: 18px 0;
}

.nav-wrapper .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Logo */
.logo img {
    height: 55px;     /* 桌面端Logo稍大 */
    width: auto;
    transition: var(--transition-fast);
}

.logo:hover img {
    transform: scale(1.03);
}

/* 主导航菜单 - PC端水平布局 */
.main-nav {
    display: flex;      /* PC端水平排列 */
    gap: 42px;          /* 桌面端菜单间距更宽松 */
    align-items: center;
    list-style: none;
    margin: 0;
    padding: 0;
}

.main-nav li {
    display: block;
}

.main-nav a {
    color: var(--text-primary);
    font-weight: 600;
    font-size: 1.05rem;
    padding: 10px 5px;
    position: relative;
    transition: var(--transition-fast);
    letter-spacing: 0.3px;
    display: block;
}

.main-nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 2px;
    transition: width 0.3s ease;
}

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

.main-nav a:hover::after,
.main-nav a.active::after {
    width: 100%;
}

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

/* 移动端菜单按钮（默认隐藏）*/
.mobile-menu-btn {
    display: none;
    background: transparent;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 10px 14px;
    cursor: pointer;
    font-size: 1.5rem;
    color: var(--text-primary);
    transition: var(--transition-fast);
}

.mobile-menu-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    background: var(--primary-light);
}

/* ==================== 移动端侧边菜单 ==================== */
.mobile-menu {
    display: none;  /* 桌面端不显示 */
    position: fixed;
    top: 0;
    right: -320px;
    width: 320px;
    height: 100vh;
    background: var(--bg-white);
    box-shadow: var(--shadow-lg);
    transition: right 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 2000;
    overflow-y: auto;
}

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

.mobile-menu-header {
    padding: 25px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--primary-color);
    color: white;
}

.mobile-menu-close {
    background: none;
    border: none;
    font-size: 1.8rem;
    cursor: pointer;
    color: white;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: var(--transition-fast);
}

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

.mobile-menu ul {
    padding: 20px;
}

.mobile-menu li {
    margin-bottom: 8px;
}

.mobile-menu a {
    color: var(--text-primary);
    font-weight: 600;
    font-size: 1.1rem;
    display: block;
    padding: 14px 18px;
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
    border-left: 3px solid transparent;
}

.mobile-menu a:hover {
    background: var(--primary-light);
    color: var(--primary-color);
    border-left-color: var(--primary-color);
    padding-left: 24px;
}

.overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.6);
    backdrop-filter: blur(4px);
    z-index: 1999;
}

.overlay.active {
    display: block;
}

/* ==================== Hero Banner轮播区（桌面端全屏） ==================== */
.hero-banner {
    position: relative;
    height: 750px;           /* 桌面端超大全屏Banner */
    overflow: hidden;
    background: linear-gradient(135deg, #1a237e 0%, #3949ab 50%, #5c6bc0 100%);
}

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

.hero-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 1.2s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.hero-slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

/* Banner内容覆盖层 */
.hero-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    color: white;
    z-index: 10;
    width: 90%;
    max-width: 950px;
}

.hero-content h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);  /* 超大标题 */
    color: white;
    margin-bottom: 25px;
    text-shadow: 0 4px 20px rgba(0,0,0,0.4);
    font-weight: 800;
    letter-spacing: -0.02em;
    line-height: 1.15;
}

.hero-content p {
    font-size: clamp(1.1rem, 2vw, 1.45rem);  /* 较大的描述文字 */
    margin-bottom: 40px;
    text-shadow: 0 3px 12px rgba(0,0,0,0.35);
    color: #ffffff;              /* 纯白，增强对比度 */
    line-height: 1.7;
    font-weight: 500;           /* 加粗提高可读性 */
}

/* 按钮组件 */
.btn {
    display: inline-block;
    padding: 16px 40px;        /* 桌面端更大的按钮 */
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 1.08rem;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    text-align: center;
    letter-spacing: 0.3px;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255,255,255,0.2);
    border-radius: 50%;
    transition: width 0.6s ease, height 0.6s ease, top 0.6s ease, left 0.6s ease;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
    top: -150px;
    left: -150px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), #1565c0);
    color: white;
    box-shadow: 0 4px 15px rgba(26,115,232,0.4);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(26,115,232,0.5);
    color: white;
}

.btn-outline {
    background: transparent;
    color: white;
    border: 2.5px solid white;
    backdrop-filter: blur(10px);
}

.btn-outline:hover {
    background: white;
    color: var(--primary-color);
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(255,255,255,0.3);
}

/* Banner指示器点 */
.banner-dots {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 14px;
    z-index: 10;
}

.banner-dot {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: rgba(255,255,255,0.4);
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
}

.banner-dot:hover {
    background: rgba(255,255,255,0.7);
    transform: scale(1.15);
}

.banner-dot.active {
    background: white;
    width: 40px;
    border-radius: 7px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

/* ==================== 区块通用样式（桌面端） ==================== */
.section {
    padding: 110px 0;          /* 桌面端超大内边距 */
}

.section-alt {
    background: linear-gradient(to bottom, var(--bg-light) 0%, #f0f4f8 100%);
}

.section-title {
    text-align: center;
    margin-bottom: 65px;
}

.section-title h2 {
    font-size: clamp(2rem, 3.5vw, 2.85rem);
    margin-bottom: 18px;
    position: relative;
    display: inline-block;
    font-weight: 800;
}

.section-title h2::after {
    content: '';
    position: absolute;
    bottom: -12px;
    left: 50%;
    transform: translateX(-50%);
    width: 70px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 2px;
}

.section-title > p {
    color: var(--text-secondary);
    font-size: 1.15rem;
    margin-top: 28px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.7;
}

.section-title .en-title {
    color: var(--text-light);
    font-size: 0.95rem;
    letter-spacing: 4px;
    text-transform: uppercase;
    font-weight: 600;
    margin-top: 12px;
}

/* ==================== 产品展示网格（桌面端） ==================== */
.products-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);  /* 默认4列 */
    gap: 35px;
    margin-top: 50px;
}

.product-card {
    background: var(--bg-white);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid rgba(0,0,0,0.04);
}

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
    border-color: transparent;
}

.product-card-image {
    position: relative;
    overflow: hidden;
    height: 260px;            /* 桌面端更高的图片区 */
    background: linear-gradient(135deg, #f5f7fa 0%, #e8ecf1 100%);
}

.product-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.product-card-body {
    padding: 25px;
}

.product-card-body h3 {
    font-size: 1.22rem;
    margin-bottom: 12px;
    color: var(--text-primary);
    font-weight: 700;
    line-height: 1.4;
}

.product-card-body h3 a {
    color: inherit;
}

.product-card-body h3 a:hover {
    color: var(--primary-color);
}

.product-card-body p {
    color: var(--text-secondary);
    font-size: 0.98rem;
    line-height: 1.65;
    margin-bottom: 0;
}

/* 产品分类标签 */
.product-category-tag {
    display: inline-block;
    padding: 5px 14px;
    background: linear-gradient(135deg, var(--primary-color), #1565c0);
    color: white;
    border-radius: 20px;
    font-size: 0.82rem;
    font-weight: 600;
    margin-bottom: 14px;
    letter-spacing: 0.3px;
}

/* 查看更多按钮 */
.view-more-btn {
    display: table;
    margin: 50px auto 0;
    padding: 15px 48px;
    background: transparent;
    color: var(--primary-color);
    border: 2.5px solid var(--primary-color);
    border-radius: 50px;
    font-weight: 700;
    font-size: 1.05rem;
    cursor: pointer;
    transition: var(--transition);
    letter-spacing: 0.5px;
}

.view-more-btn:hover {
    background: var(--primary-color);
    color: white;
    box-shadow: 0 6px 20px rgba(26,115,232,0.35);
    transform: translateY(-2px);
}

/* ==================== 公司简介区（桌面端） ==================== */
.about-section {
    display: grid;
    grid-template-columns: 1fr 1.1fr;  /* 文字略宽 */
    gap: 80px;
    align-items: center;
}

.about-image {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    position: relative;
}

.about-image img {
    width: 100%;
    height: 480px;              /* 桌面端更高的图片 */
    object-fit: cover;
    transition: transform 0.6s ease;
}

.about-image:hover img {
    transform: scale(1.03);
}

.about-content h2 {
    font-size: 2.3rem;
    margin-bottom: 30px;
    font-weight: 800;
    color: var(--text-primary);
}

.about-content p {
    color: var(--text-secondary);
    margin-bottom: 22px;
    line-height: 1.85;
    font-size: 1.08rem;
}

.feature-list {
    list-style: none;
    margin-top: 35px;
    display: grid;
    grid-template-columns: 1fr 1fr;  /* 两列特性列表 */
    gap: 15px;
}

.feature-list li {
    padding: 13px 0 13px 32px;
    position: relative;
    color: var(--text-secondary);
    font-size: 1.02rem;
    font-weight: 500;
}

.feature-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--secondary-color);
    font-weight: bold;
    font-size: 1.35rem;
}

/* ==================== 数据统计区（桌面端） ==================== */
.stats-section {
    background: linear-gradient(135deg, #1565c0 0%, #1976d2 50%, #1e88e5 100%);
    color: white;
    padding: 80px 0;
    position: relative;
    overflow: hidden;
}

.stats-section::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
    border-radius: 50%;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 45px;
    text-align: center;
    position: relative;
    z-index: 1;
}

.stat-item {
    padding: 25px;
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.stat-item:hover {
    background: rgba(255,255,255,0.1);
    transform: translateY(-5px);
}

.stat-item h3 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    color: white;
    margin-bottom: 12px;
    font-weight: 800;
    text-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

.stat-item p {
    font-size: 1.15rem;
    color: #ffffff;        /* 纯白色，不用opacity降亮度 */
    font-weight: 600;       /* 加粗提高可读性 */
    letter-spacing: 0.5px;
    text-shadow: 0 2px 8px rgba(0,0,0,0.15);  /* 轻微阴影增强对比 */
}

/* ==================== 应用场景网格（桌面端） ==================== */
.scenarios-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);  /* 桌面端3列 */
    gap: 38px;
}

.scenario-card {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    height: 310px;             /* 更高的卡片 */
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid rgba(0,0,0,0.06);
}

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

.scenario-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.scenario-card:hover img {
    transform: scale(1.08);
}

.scenario-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.88) 0%, rgba(0,0,0,0.3) 70%, transparent 100%);
    color: white;
    padding: 40px 28px 28px;
}

.scenario-overlay h3 {
    color: white;
    font-size: 1.5rem;
    font-weight: 700;
}

/* ==================== 设备展示区（桌面端） ==================== */
.equipment-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);  /* 桌面端3列 */
    gap: 38px;
}

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

.equipment-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-6px);
    border-color: transparent;
}

.equipment-image {
    height: 290px;             /* 更高的设备图片区 */
    overflow: hidden;
    background: linear-gradient(135deg, #f5f7fa 0%, #e8ecf1 100%);
}

.equipment-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.equipment-card:hover .equipment-image img {
    transform: scale(1.06);
}

.equipment-info {
    padding: 28px;
}

.equipment-info h3 {
    font-size: 1.35rem;
    margin-bottom: 12px;
    font-weight: 700;
}

.equipment-info p {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.7;
}

/* 设备Tab切换标签 */
.equipment-tabs {
    display: flex;
    justify-content: center;
    gap: 25px;
    margin-bottom: 50px;
}

.tab-btn {
    padding: 14px 38px;
    background: var(--bg-white);
    border: 2.5px solid var(--border-color);
    border-radius: 50px;
    font-weight: 700;
    font-size: 1.05rem;
    cursor: pointer;
    transition: var(--transition);
    color: var(--text-primary);
    letter-spacing: 0.3px;
}

.tab-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    box-shadow: var(--shadow-sm);
}

.tab-btn.active,
.tab-btn:hover.active {
    background: linear-gradient(135deg, var(--primary-color), #1565c0);
    color: white;
    border-color: transparent;
    box-shadow: 0 4px 15px rgba(26,115,232,0.4);
}

.tab-content {
    display: none;
    animation: fadeInUp 0.5s ease;
}

.tab-content.active {
    display: block;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==================== 联系我们区（桌面端） ==================== */
.contact-grid {
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    gap: 60px;
}

.contact-info {
    padding: 50px;
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.contact-info h2 {
    margin-bottom: 35px;
    font-size: 2.2rem;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: 30px;
    gap: 20px;
}

.contact-icon {
    width: 54px;
    height: 54px;
    background: linear-gradient(135deg, var(--primary-color), #1565c0);
    color: white;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    flex-shrink: 0;
    box-shadow: 0 4px 12px rgba(26,115,232,0.3);
}

.contact-details h4 {
    font-size: 1.1rem;
    margin-bottom: 6px;
    color: var(--text-primary);
    font-weight: 700;
}

.contact-details p {
    color: var(--text-secondary);
    font-size: 1rem;
    margin-bottom: 0;
}

.contact-details a {
    color: var(--primary-color);
    font-weight: 600;
    font-size: 1.08rem;
}

.map-container {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    height: 100%;
    min-height: 520px;         /* 桌面端更高的地图 */
}

.map-container iframe {
    width: 100%;
    height: 100%;
    border: none;
}

/* 二维码区域 */
.qrcode-container {
    text-align: center;
    margin-top: 40px;
    padding-top: 35px;
    border-top: 2px solid var(--border-color);
}

.qrcode-container img {
    width: 170px;
    height: 170px;
    margin: 0 auto 14px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.qrcode-container p {
    color: var(--text-secondary);
    font-size: 0.98rem;
    font-weight: 500;
}

/* 页脚抖音二维码 */
.footer-qrcode {
    text-align: center;
    padding-top: 35px;
}

.footer-qrcode h4 {
    color: white;
    margin-bottom: 22px;
    font-size: 1.15rem;
    font-weight: 700;
    letter-spacing: 0.3px;
}

.footer-qrcode img {
    width: 120px;
    height: 120px;
    margin: 0 auto 14px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.footer-qrcode p {
    color: #888;
    font-size: 0.98rem;
    font-weight: 500;
}

/* ==================== 页脚（桌面端） ==================== */
.footer {
    background: linear-gradient(180deg, #1a1a1a 0%, #0d0d0d 100%);
    color: #ccc;
    padding: 80px 0 40px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1.2fr 1.2fr 1.5fr;  /* 桌面端4列 */
    gap: 55px;
    margin-bottom: 55px;
}

.footer-about h3 {
    color: white;
    margin-bottom: 22px;
    font-size: 1.5rem;
    font-weight: 700;
}

.footer-about p {
    color: #999;
    line-height: 1.85;
    margin-bottom: 16px;
    font-size: 0.98rem;
}

.footer-links h4 {
    color: white;
    margin-bottom: 22px;
    font-size: 1.15rem;
    font-weight: 700;
    letter-spacing: 0.3px;
}

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

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

.footer-links a {
    color: #aaa;
    font-size: 0.98rem;
    transition: var(--transition-fast);
    display: inline-block;
}

.footer-links a:hover {
    color: white;
    padding-left: 8px;
}

.footer-contact p {
    color: #aaa;
    margin-bottom: 12px;
    font-size: 0.98rem;
    line-height: 1.6;
}

.footer-contact h4 {
    color: white;
    margin-bottom: 22px;
    font-size: 1.15rem;
    font-weight: 700;
    letter-spacing: 0.3px;
}

.footer-contact a {
    color: #aaa;
}

.footer-contact a:hover {
    color: white;
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 28px;
    text-align: center;
    color: #777;
    font-size: 0.92rem;
}

.footer-bottom a {
    color: #777;
}

.footer-bottom a:hover {
    color: white;
}

/* ==================== 内页Banner（桌面端） ==================== */
.page-banner {
    height: 420px;             /* 桌面端更高 */
    background: linear-gradient(135deg, rgba(21,101,192,0.94) 0%, rgba(26,115,232,0.92) 100%),
                url('../img/header/ab-ban.jpg') center/cover;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: white;
    position: relative;
}

.page-banner::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 120px;
    background: linear-gradient(to top, rgba(255,255,255,1) 0%, transparent 100%);
}

.page-banner h1 {
    font-size: clamp(2.2rem, 4vw, 3.2rem);
    color: white;
    margin-bottom: 18px;
    font-weight: 800;
    position: relative;
    z-index: 1;
}

.page-banner p {
    font-size: 1.25rem;
    color: #ffffff;          /* 显式设置纯白 */
    position: relative;
    z-index: 1;
    font-weight: 500;
    text-shadow: 0 2px 8px rgba(0,0,0,0.12);
}

.breadcrumb {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(255,255,255,0.25);
    backdrop-filter: blur(15px);
    padding: 12px 32px;
    border-radius: 30px;
    font-size: 0.95rem;
    z-index: 2;
    border: 1px solid rgba(255,255,255,0.3);
}

.breadcrumb a {
    color: white;
    font-weight: 500;
}

.breadcrumb span {
    margin: 0 12px;
    color: rgba(255,255,255,0.85);  /* 提高可见度，不再用opacity */
}

/* ==================== 企业文化卡片（桌面端） ==================== */
.culture-values {
    display: grid;
    grid-template-columns: repeat(3, 1fr);  /* 桌面端3列 */
    gap: 38px;
    margin-top: 50px;
}

.culture-card {
    background: var(--bg-white);
    padding: 50px 36px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    text-align: center;
    transition: var(--transition);
    border-top: 5px solid var(--primary-color);
    border: 1px solid rgba(0,0,0,0.04);
    border-top: 5px solid var(--primary-color);
}

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

.culture-icon {
    font-size: 3.5rem;
    margin-bottom: 24px;
}

.culture-card h3 {
    margin-bottom: 18px;
    font-size: 1.45rem;
    font-weight: 700;
}

.culture-card p {
    color: var(--text-secondary);
    line-height: 1.75;
    font-size: 1.02rem;
}

/* ==================== 回到顶部按钮 ==================== */
.back-to-top {
    position: fixed;
    bottom: 40px;
    right: 40px;
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--primary-color), #1565c0);
    color: white;
    border: none;
    border-radius: 50%;
    font-size: 1.6rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    box-shadow: 0 4px 15px rgba(26,115,232,0.4);
    z-index: 999;
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.back-to-top:hover {
    background: linear-gradient(135deg, #1565c0, #0d47a1);
    transform: translateY(-4px) scale(1.08);
    box-shadow: 0 8px 25px rgba(26,115,232,0.5);
}

/* ==================== 加载动画（滚动触发） ==================== */
.fade-in {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1), 
                transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ================================================================
   响应式适配（从大到小）
   注意：以上所有样式都是【桌面端优先】的基础样式
   以下是逐步降级的移动端适配
   ================================================================ */

/* ---------- 大屏幕增强 (1600px+) ---------- */
@media (min-width: 1600px) {
    .container {
        max-width: 1480px;
        padding: 0 60px;
    }
    
    .container-wide {
        max-width: 1680px;
        padding: 0 70px;
    }
    
    .hero-banner {
        height: 850px;
    }
    
    .products-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: 40px;
    }
    
    .scenarios-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 42px;
    }
    
    .equipment-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 42px;
    }
    
    .about-section {
        gap: 100px;
    }
    
    .stats-section {
        padding: 100px 0;
    }
}

/* ---------- 平板横屏 (1200px - 1599px) ---------- */
@media (max-width: 1599px) and (min-width: 1201px) {
    .hero-banner {
        height: 700px;
    }
    
    .products-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: 32px;
    }
}

/* ---------- 平板竖屏 (1024px - 1200px) ---------- */
@media (max-width: 1200px) {
    html {
        font-size: 17px;
    }
    
    .container {
        padding: 0 35px;
    }
    
    .container-wide {
        padding: 0 40px;
    }
    
    .hero-banner {
        height: 650px;
    }
    
    .hero-content h1 {
        font-size: 3rem;
    }
    
    .section {
        padding: 90px 0;
    }
    
    .products-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 30px;
    }
    
    .scenarios-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 32px;
    }
    
    .equipment-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 32px;
    }
    
    .culture-values {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .about-section {
        gap: 50px;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 35px;
    }
    
    .footer-grid {
        grid-template-columns: 1.5fr 1fr 1fr 1.3fr;
        gap: 40px;
    }
    
    .contact-grid {
        gap: 45px;
    }
    
    .main-nav {
        gap: 32px;
    }

    .page-banner {
        height: 380px;
    }
}

/* ---------- 小平板 (768px - 1023px) ---------- */
@media (max-width: 1023px) {
    html {
        font-size: 16px;
    }
    
    .container {
        max-width: 100%;
        padding: 0 28px;
    }
    
    .container-wide {
        padding: 0 30px;
    }
    
    /* 显示移动端菜单按钮 */
    .main-nav {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    .mobile-menu {
        display: block;
    }
    
    /* Banner缩小 */
    .hero-banner {
        height: 550px;
    }
    
    .hero-content h1 {
        font-size: 2.4rem;
    }
    
    .hero-content p {
        font-size: 1.1rem;
    }
    
    /* 区块内边距缩小 */
    .section {
        padding: 70px 0;
    }
    
    .section-title {
        margin-bottom: 50px;
    }
    
    /* 网格变为2列 */
    .products-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 25px;
    }
    
    .product-card-image {
        height: 220px;
    }
    
    .scenarios-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 25px;
    }
    
    .scenario-card {
        height: 260px;
    }
    
    .equipment-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 25px;
    }
    
    .equipment-image {
        height: 240px;
    }
    
    .culture-values {
        grid-template-columns: repeat(2, 1fr);
        gap: 25px;
    }
    
    /* 单列布局 */
    .about-section {
        grid-template-columns: 1fr;
        gap: 35px;
    }
    
    .about-image img {
        height: 350px;
    }
    
    .feature-list {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 25px;
    }
    
    .stat-item h3 {
        font-size: 2.5rem;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 35px;
    }
    
    .map-container {
        min-height: 380px;
    }
    
    /* Footer变为2列 */
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 35px;
    }
    
    .footer {
        padding: 60px 0 35px;
    }
    
    /* 内页Banner缩小 */
    .page-banner {
        height: 320px;
    }
    
    .page-banner h1 {
        font-size: 2.2rem;
    }
    
    /* 按钮缩小 */
    .btn {
        padding: 13px 32px;
        font-size: 1rem;
    }
}

/* ---------- 手机大屏 (576px - 767px) ---------- */
@media (max-width: 767px) {
    html {
        font-size: 15px;
    }
    
    body {
        line-height: 1.65;
    }
    
    .container {
        padding: 0 20px;
    }
    
    .container-wide {
        padding: 0 20px;
    }
    
    /* 顶部栏简化 */
    .top-bar {
        padding: 8px 0;
        font-size: 0.82rem;
    }
    
    .top-bar a {
        margin-left: 15px;
        font-size: 0.8rem;
    }
    
    /* Logo缩小 */
    .logo img {
        height: 44px;
    }
    
    /* 导航间距调整 */
    .nav-wrapper {
        padding: 14px 0;
    }
    
    /* Banner继续缩小 */
    .hero-banner {
        height: 480px;
    }
    
    .hero-content {
        width: 95%;
    }
    
    .hero-content h1 {
        font-size: 2rem;
        margin-bottom: 18px;
    }
    
    .hero-content p {
        font-size: 1rem;
        margin-bottom: 28px;
    }
    
    /* 区块内边距进一步缩小 */
    .section {
        padding: 55px 0;
    }
    
    .section-title {
        margin-bottom: 40px;
    }
    
    .section-title h2 {
        font-size: 1.85rem;
    }
    
    /* 产品卡片单列或2列 */
    .products-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 18px;
        margin-top: 35px;
    }
    
    .product-card-image {
        height: 180px;
    }
    
    .product-card-body {
        padding: 18px;
    }
    
    .product-card-body h3 {
        font-size: 1.05rem;
    }
    
    /* 场景卡片 */
    .scenarios-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .scenario-card {
        height: 230px;
    }
    
    /* 设备展示单列 */
    .equipment-grid {
        grid-template-columns: 1fr;
        gap: 22px;
    }
    
    .equipment-image {
        height: 220px;
    }
    
    .equipment-info {
        padding: 20px;
    }
    
    /* 文化卡片单列 */
    .culture-values {
        grid-template-columns: 1fr;
        gap: 22px;
    }
    
    .culture-card {
        padding: 35px 25px;
    }
    
    .culture-icon {
        font-size: 2.8rem;
    }
    
    /* About区域 */
    .about-image img {
        height: 280px;
    }
    
    .about-content h2 {
        font-size: 1.75rem;
    }
    
    /* 统计数据 */
    .stats-section {
        padding: 55px 0;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
    
    .stat-item {
        padding: 18px;
    }
    
    .stat-item h3 {
        font-size: 2.2rem;
    }
    
    .stat-item p {
        font-size: 1rem;
    }
    
    /* 联系我们 */
    .contact-info {
        padding: 30px;
    }
    
    .contact-info h2 {
        font-size: 1.65rem;
        margin-bottom: 25px;
    }
    
    .contact-item {
        margin-bottom: 22px;
        gap: 15px;
    }
    
    .contact-icon {
        width: 46px;
        height: 46px;
        font-size: 1.2rem;
    }
    
    .map-container {
        min-height: 300px;
    }
    
    /* Tab切换垂直排列 */
    .equipment-tabs {
        flex-direction: column;
        gap: 12px;
        margin-bottom: 35px;
    }
    
    .tab-btn {
        padding: 12px 28px;
        font-size: 0.98rem;
    }
    
    /* Footer单列 */
    .footer {
        padding: 50px 0 30px;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 30px;
        margin-bottom: 40px;
    }
    
    .footer-about h3,
    .footer-links h4,
    .footer-contact h4 {
        font-size: 1.1rem;
        margin-bottom: 16px;
    }
    
    /* 内页Banner */
    .page-banner {
        height: 260px;
    }
    
    .page-banner h1 {
        font-size: 1.85rem;
    }
    
    .page-banner p {
        font-size: 1rem;
    }
    
    .breadcrumb {
        bottom: 25px;
        padding: 10px 22px;
        font-size: 0.85rem;
    }
    
    /* 按钮 */
    .btn {
        padding: 11px 28px;
        font-size: 0.96rem;
    }
    
    .view-more-btn {
        padding: 12px 36px;
        font-size: 0.98rem;
        margin-top: 35px;
    }
    
    /* 二维码 */
    .qrcode-container img {
        width: 140px;
        height: 140px;
    }
    
    /* 回到顶部按钮 */
    .back-to-top {
        width: 48px;
        height: 48px;
        bottom: 25px;
        right: 25px;
        font-size: 1.4rem;
    }
}

/* ---------- 小手机 (320px - 575px) ---------- */
@media (max-width: 575px) {
    html {
        font-size: 14px;
    }
    
    .container {
        padding: 0 16px;
    }
    
    .hero-banner {
        height: 420px;
    }
    
    .hero-content h1 {
        font-size: 1.7rem;
    }
    
    .hero-content p {
        font-size: 0.92rem;
        margin-bottom: 24px;
    }
    
    /* 所有网格变单列 */
    .products-grid,
    .scenarios-grid,
    .equipment-grid,
    .culture-values {
        grid-template-columns: 1fr;
    }
    
    .products-grid {
        gap: 16px;
    }
    
    .product-card-image {
        height: 200px;
    }
    
    .stats-grid {
        grid-template-columns: 1fr 1fr;
        gap: 16px;
    }
    
    .stat-item h3 {
        font-size: 1.85rem;
    }
    
    .section {
        padding: 45px 0;
    }
    
    .section-title h2 {
        font-size: 1.65rem;
    }
    
    .about-image img {
        height: 240px;
    }
    
    .page-banner {
        height: 220px;
    }
    
    .page-banner h1 {
        font-size: 1.6rem;
    }
    
    .btn {
        padding: 10px 24px;
        font-size: 0.92rem;
        display: block;
        width: 100%;
        margin: 10px 0;
    }
    
    .banner-dots {
        bottom: 25px;
        gap: 10px;
    }
    
    .banner-dot {
        width: 11px;
        height: 11px;
    }
    
    .back-to-top {
        width: 44px;
        height: 44px;
        bottom: 20px;
        right: 20px;
        font-size: 1.3rem;
    }
}

/* ==================== 打印样式 ==================== */
@media print {
    .header,
    .footer,
    .back-to-top,
    .mobile-menu,
    .overlay,
    .hero-banner,
    .banner-dots {
        display: none !important;
    }
    
    body {
        color: #000 !important;
        background: #fff !important;
        font-size: 12pt;
    }
    
    .section {
        padding: 20pt 0;
    }
    
    a[href]::after {
        content: " (" attr(href) ")";
        font-size: 10pt;
        color: #666;
    }
}