/* ===== 应急消防行业高端大气UI样式 ===== */
/* 参考DJI和中岳航空的设计风格，结合应急行业特性 */

/* ===== 全局样式与变量定义 ===== */
:root {
    /* 主色调 - 深蓝色系，代表专业、可靠 */
    --primary-color: #003366;
    --primary-dark: #002244;
    --primary-light: #004488;
    --primary-lighter: #0055aa;
    
    /* 辅助色 - 红色系，代表紧急、警示 */
    --emergency-color: #e53935;
    --emergency-dark: #c62828;
    --emergency-light: #ef5350;
    
    /* 中性色 */
    --dark-color: #1a1a1a;
    --text-color: #333333;
    --text-light: #666666;
    --text-muted: #999999;
    --light-gray: #f5f7fa;
    --medium-gray: #e0e6ed;
    --dark-gray: #d3dce6;
    
    /* 渐变色 */
    --gradient-primary: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    --gradient-emergency: linear-gradient(135deg, var(--emergency-color), var(--emergency-light));
    --gradient-hero: linear-gradient(135deg, rgba(0, 51, 102, 0.85), rgba(0, 68, 136, 0.75));
    
    /* 阴影效果 */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.2);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.25);
    
    /* 过渡效果 */
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    --transition-fast: all 0.2s cubic-bezier(0.25, 0.8, 0.25, 1);
}

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

body {
    font-family: 'Microsoft YaHei', 'PingFang SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-color);
    background-color: #ffffff;
    overflow-x: hidden;
}

/* 容器和布局 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.container-fluid {
    width: 100%;
    padding: 0 20px;
}

.section {
    padding: 100px 0;
    position: relative;
}

.section-dark {
    background-color: var(--light-gray);
    padding: 100px 0;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 14px 32px;
    font-size: 16px;
    font-weight: 600;
    text-align: center;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: var(--transition);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 0;
    height: 100%;
    background-color: rgba(255, 255, 255, 0.1);
    transition: width 0.3s ease;
    z-index: -1;
}

.btn:hover::before {
    width: 100%;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 12px rgba(0, 51, 102, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.btn-emergency {
    background: var(--gradient-emergency);
    color: white;
    box-shadow: 0 4px 12px rgba(229, 57, 53, 0.3);
}

.btn-emergency:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.btn-outline {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-outline:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

.btn-lg {
    padding: 18px 40px;
    font-size: 18px;
}

.btn-sm {
    padding: 10px 24px;
    font-size: 14px;
}

/* 顶部导航 */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: var(--transition);
}

.site-header.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-md);
}

.top-bar {
    background: var(--primary-color);
    color: white;
    padding: 10px 0;
    font-size: 14px;
}

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

.top-bar-left {
    display: flex;
    gap: 20px;
}

.top-bar-right a {
    color: white;
    margin-left: 15px;
    opacity: 0.8;
    transition: var(--transition-fast);
}

.top-bar-right a:hover {
    opacity: 1;
}

.main-nav {
    padding: 16px 0;
}

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

.nav-brand .logo {
    display: flex;
    align-items: center;
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition-fast);
}

.nav-brand .logo i {
    margin-right: 10px;
    font-size: 32px;
    color: var(--emergency-color);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-menu li {
    position: relative;
}

.nav-menu li a {
    display: block;
    padding: 12px 20px;
    font-size: 16px;
    font-weight: 500;
    color: var(--text-color);
    border-radius: 4px;
    transition: var(--transition-fast);
    position: relative;
}

.nav-menu li a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: var(--transition);
    transform: translateX(-50%);
}

.nav-menu li:hover a::after,
.nav-menu li.active a::after {
    width: 80%;
}

.nav-menu li:hover a,
.nav-menu li.active a {
    color: var(--primary-color);
    background-color: rgba(0, 51, 102, 0.08);
}

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

/* 首页轮播 */
.hero {
    margin-top: 116px;
    position: relative;
    height: 100vh;
    min-height: 600px;
    overflow: hidden;
}

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

.hero-slide {
    position: absolute;
    width: 100%;
    height: 100%;
    display: none;
    background-size: cover;
    background-position: center;
}

.hero-slide::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-hero);
}

.hero-slide.active {
    display: block;
    animation: fadeIn 1.2s ease-in-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: scale(1.05);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.hero-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    color: white;
    z-index: 10;
    max-width: 800px;
    padding: 0 20px;
}

.hero-content h1 {
    font-size: 56px;
    font-weight: 700;
    margin-bottom: 24px;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    line-height: 1.2;
    letter-spacing: 1px;
}

.hero-content p {
    font-size: 20px;
    margin-bottom: 32px;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
    line-height: 1.6;
    opacity: 0.9;
}

.hero-dots {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 12px;
}

.hero-dots span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.4);
    cursor: pointer;
    transition: var(--transition-fast);
}

.hero-dots span.active {
    background-color: white;
    transform: scale(1.2);
}

/* 快速入口 */
.quick-entry {
    margin-top: -60px;
    position: relative;
    z-index: 100;
}

.quick-entry-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.quick-entry-item {
    background: white;
    padding: 40px 25px;
    text-align: center;
    border-radius: 8px;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    cursor: pointer;
    position: relative;
    overflow: hidden;
    border-top: 4px solid transparent;
}

.quick-entry-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: var(--transition);
    transform-origin: left;
}

.quick-entry-item:hover::before {
    transform: scaleX(1);
}

.quick-entry-item:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.quick-entry-item i {
    font-size: 48px;
    color: var(--primary-color);
    margin-bottom: 20px;
    transition: var(--transition);
}

.quick-entry-item:hover i {
    color: var(--emergency-color);
    transform: scale(1.1);
}

.quick-entry-item h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-color);
}

.quick-entry-item p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.5;
}

/* 核心数据 */
.stats {
    background: var(--gradient-primary);
    color: white;
    padding: 80px 0;
    position: relative;
    overflow: hidden;
}

.stats::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    position: relative;
    z-index: 1;
}

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

.stat-item .number {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 15px;
    display: block;
}

.stat-item .label {
    font-size: 16px;
    opacity: 0.9;
    font-weight: 500;
    letter-spacing: 0.5px;
}

/* 关于我们 */
.about-section {
    position: relative;
}

.section-title {
    text-align: center;
    margin-bottom: 70px;
}

.section-title h2 {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-color);
    position: relative;
    display: inline-block;
}

.section-title h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: var(--gradient-primary);
}

.section-title p {
    font-size: 18px;
    color: var(--text-light);
    max-width: 600px;
    margin: 25px auto 0;
    line-height: 1.6;
}

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

.about-content .about-image {
    flex: 1;
    position: relative;
    overflow: hidden;
    border-radius: 8px;
    box-shadow: var(--shadow-lg);
}

.about-content .about-image img {
    width: 100%;
    height: auto;
    display: block;
    transition: var(--transition);
}

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

.about-content .about-text {
    flex: 1;
}

.about-content .about-text h3 {
    font-size: 32px;
    margin-bottom: 24px;
    color: var(--primary-color);
    font-weight: 700;
}

.about-content .about-text p {
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 20px;
    font-size: 16px;
}

/* 产品展示 */
.product-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.product-card {
    background: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    position: relative;
}

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

.product-card-image {
    position: relative;
    height: 240px;
    overflow: hidden;
}

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

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

.product-badge {
    position: absolute;
    top: 15px;
    left: 15px;
    background: var(--gradient-emergency);
    color: white;
    padding: 5px 12px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

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

.product-category {
    display: inline-block;
    background: var(--light-gray);
    color: var(--text-muted);
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 12px;
}

.product-card-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
    line-height: 1.3;
}

.product-card-title a {
    color: inherit;
    text-decoration: none;
    transition: var(--transition-fast);
}

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

.product-card-model {
    color: var(--text-muted);
    font-size: 14px;
    margin-bottom: 15px;
}

.product-card-summary {
    font-size: 15px;
    color: var(--text-light);
    margin-bottom: 20px;
    line-height: 1.6;
    height: 48px;
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}

.product-card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.product-card-price {
    font-size: 20px;
    font-weight: 700;
    color: var(--emergency-color);
}

/* 表单样式 */
.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--text-color);
    font-size: 15px;
}

.form-control {
    width: 100%;
    padding: 14px 16px;
    border: 1px solid var(--dark-gray);
    border-radius: 4px;
    font-size: 15px;
    transition: var(--transition);
    background-color: #fff;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 51, 102, 0.1);
}

textarea.form-control {
    resize: vertical;
    min-height: 120px;
}

/* 联系信息 */
.contact-info {
    list-style: none;
    margin-bottom: 40px;
}

.contact-info li {
    display: flex;
    align-items: flex-start;
    margin-bottom: 20px;
}

.contact-info i {
    color: var(--emergency-color);
    font-size: 20px;
    margin-right: 15px;
    margin-top: 2px;
    width: 24px;
    text-align: center;
}

.contact-info div {
    flex: 1;
}

.contact-info strong {
    display: block;
    margin-bottom: 5px;
    font-weight: 600;
    color: var(--text-color);
}

.contact-info p {
    margin: 0;
    color: var(--text-light);
    line-height: 1.6;
}

/* 页脚 */
.site-footer {
    background: var(--dark-color);
    color: #cccccc;
    padding-top: 70px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    margin-bottom: 60px;
}

.footer-title {
    font-size: 18px;
    color: white;
    margin-bottom: 25px;
    font-weight: 600;
    position: relative;
    padding-bottom: 15px;
}

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

.footer-desc {
    margin-bottom: 25px;
    line-height: 1.8;
    color: #cccccc;
}

.social-links {
    display: flex;
    gap: 12px;
}

.social-links a {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    transition: var(--transition);
}

.social-links a:hover {
    background-color: var(--primary-color);
    transform: translateY(-3px);
}

.footer-links li {
    margin-bottom: 15px;
}

.footer-links a {
    color: #cccccc;
    transition: var(--transition-fast);
    position: relative;
    padding-left: 15px;
}

.footer-links a::before {
    content: '›';
    position: absolute;
    left: 0;
    transition: var(--transition-fast);
}

.footer-links a:hover {
    color: white;
    padding-left: 20px;
}

.footer-bottom {
    background: rgba(0, 0, 0, 0.2);
    padding: 20px 0;
    text-align: center;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-bottom p {
    font-size: 14px;
    margin-bottom: 5px;
    color: #999999;
}

/* 回到顶部 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
    box-shadow: var(--shadow-md);
}

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

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

/* 滚动指示器 */
.hero-scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    color: white;
    text-align: center;
    font-size: 14px;
    opacity: 0.8;
    animation: pulse 2s infinite;
    z-index: 10;
}

.hero-scroll-indicator span {
    display: block;
    margin-bottom: 10px;
}

.hero-scroll-indicator i {
    font-size: 20px;
    animation: bounce 2s infinite;
}

@keyframes pulse {
    0% {
        opacity: 0.4;
    }
    50% {
        opacity: 0.8;
    }
    100% {
        opacity: 0.4;
    }
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-10px);
    }
    60% {
        transform: translateY(-5px);
    }
}

/* 产品分类过滤按钮 */
.category-filters {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 15px;
    margin-bottom: 20px;
}

.category-filter-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: 25px;
    background-color: white;
    color: var(--text-color);
    border: 2px solid var(--dark-gray);
    font-size: 15px;
    font-weight: 500;
    text-decoration: none;
    transition: var(--transition);
}

.category-filter-btn i {
    font-size: 16px;
}

.category-filter-btn:hover {
    background-color: var(--light-gray);
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.category-filter-btn.active {
    background: var(--gradient-primary);
    color: white;
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
}

/* ===== 产品详情页样式 ===== */
.breadcrumb {
    color: var(--text-light);
    font-size: 14px;
    padding: 0;
}

.breadcrumb a {
    color: var(--text-light);
    text-decoration: none;
    transition: var(--transition-fast);
}

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

.breadcrumb .separator {
    margin: 0 10px;
}

.product-detail-container {
    max-width: 1200px;
    margin: 0 auto;
}

.product-main-content {
    display: flex;
    gap: 50px;
    margin-bottom: 60px;
}

/* 产品图片 */
.product-images {
    flex: 0 0 500px;
}

.main-image-container {
    position: relative;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.main-image {
    width: 100%;
    height: 500px;
    object-fit: cover;
}

.thumbnail-container {
    display: flex;
    gap: 10px;
    margin-top: 15px;
    flex-wrap: wrap;
}

.thumbnail-image {
    width: 80px;
    height: 80px;
    object-fit: cover;
    border-radius: 5px;
    cursor: pointer;
    border: 2px solid transparent;
    transition: var(--transition-fast);
}

.thumbnail-image:hover,
.thumbnail-image.active {
    border-color: var(--primary-color);
}

/* 产品信息 */
.product-info {
    flex: 1;
}

.product-category-badge {
    display: inline-block;
    background: var(--gradient-primary);
    color: white;
    padding: 6px 15px;
    border-radius: 4px;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 20px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.product-title {
    font-size: 36px;
    color: var(--text-color);
    margin-bottom: 20px;
    line-height: 1.4;
    font-weight: 700;
}

.product-model {
    color: var(--text-light);
    font-size: 16px;
    margin-bottom: 20px;
}

.product-price {
    font-size: 32px;
    color: var(--primary-color);
    font-weight: 700;
    margin-bottom: 20px;
}

.product-summary {
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 30px;
}

.product-actions {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

/* 产品详情部分 */
.product-description,
.product-features,
.product-specs {
    margin-bottom: 60px;
}

.section-heading {
    font-size: 28px;
    color: var(--text-color);
    margin-bottom: 30px;
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 10px;
    display: inline-block;
    font-weight: 700;
}

.content {
    line-height: 2;
    font-size: 16px;
    color: var(--text-color);
    word-wrap: break-word;
    overflow-wrap: break-word;
}

/* 产品图库 */
.product-gallery {
    margin-bottom: 60px;
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

.gallery-image {
    width: 100%;
    height: 250px;
    object-fit: cover;
    border-radius: 10px;
    transition: var(--transition);
}

.gallery-image:hover {
    transform: scale(1.02);
    box-shadow: var(--shadow-lg);
}

/* 分页 */
.pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 50px;
}

.pagination a,
.pagination span {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border: 1px solid var(--dark-gray);
    border-radius: 4px;
    color: var(--text-color);
    font-weight: 500;
    transition: var(--transition-fast);
}

.pagination a:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    transform: translateY(-2px);
}

.pagination span.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* 移动端导航 */
.mobile-nav {
    display: none;
    position: fixed;
    top: 0;
    right: -100%;
    width: 300px;
    height: 100vh;
    background: white;
    box-shadow: -5px 0 20px rgba(0, 0, 0, 0.2);
    z-index: 1001;
    transition: right 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
    overflow-y: auto;
}

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

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

.close-menu {
    font-size: 24px;
    cursor: pointer;
    background: none;
    border: none;
    color: white;
}

.mobile-nav-menu {
    list-style: none;
}

.mobile-nav-menu li a {
    display: block;
    padding: 15px 20px;
    border-bottom: 1px solid var(--medium-gray);
    color: var(--text-color);
    font-weight: 500;
    transition: var(--transition-fast);
}

.mobile-nav-menu li a:hover {
    background: var(--light-gray);
    color: var(--primary-color);
    padding-left: 25px;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .hero-content h1 {
        font-size: 48px;
    }
    
    .product-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .quick-entry-grid,
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: block;
    }
    
    .hero {
        margin-top: 116px;
        height: 80vh;
        min-height: 500px;
    }
    
    .hero-content h1 {
        font-size: 36px;
    }
    
    .hero-content p {
        font-size: 16px;
    }
    
    .product-grid,
    .quick-entry-grid,
    .stats-grid,
    .footer-grid {
        grid-template-columns: 1fr;
    }
    
    .about-content {
        flex-direction: column;
        gap: 40px;
    }
    
    .section-title h2 {
        font-size: 32px;
    }
    
    .section {
        padding: 70px 0;
    }
    
    .stats {
        padding: 60px 0;
    }
    
    .stat-item .number {
        font-size: 36px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .hero-content h1 {
        font-size: 28px;
    }
    
    .btn {
        padding: 12px 24px;
        font-size: 14px;
    }
    
    .product-card-body {
        padding: 20px;
    }
    
    .section-title h2 {
        font-size: 28px;
    }
    
    .section-title p {
        font-size: 16px;
    }
}