/* 基础重置和变量 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #4CAF50;
    --secondary-color: #45a049;
    --accent-color: #ff9800;
    --background-dark: #2c2c2c;
    --background-light: #f5f5f5;
    --text-dark: #333;
    --text-light: #666;
    --text-white: #fff;
    --border-color: #ddd;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --border-radius: 8px;
    --transition: all 0.3s ease;
}

body {
    font-family: 'Arial', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background: var(--background-dark);
}

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

/* 头部导航 */
.header {
    background: var(--background-dark);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    transition: var(--transition);
}

.navbar {
    padding: 1rem 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--text-white);
}

.nav-logo i {
    color: var(--accent-color);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 0.5rem;
}

.nav-link {
    color: var(--text-white);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.btn-login,
.btn-register {
    padding: 0.5rem 1rem;
    text-decoration: none;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.btn-login {
    color: var(--text-white);
    border: 1px solid var(--text-white);
}

.btn-register {
    background: var(--accent-color);
    color: var(--text-white);
}

.btn-login:hover {
    background: var(--text-white);
    color: var(--text-dark);
}

.btn-register:hover {
    background: #e68900;
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-white);
    font-size: 1.5rem;
    cursor: pointer;
}

/* 主横幅区域 */
.hero {
    background: linear-gradient(135deg, var(--background-dark) 0%, #1a1a1a 100%);
    padding: 120px 0 80px;
    overflow: hidden;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-content {
    color: var(--text-white);
}

.hero-title {
    font-size: 3rem;
    font-weight: bold;
    margin-bottom: 2rem;
    line-height: 1.2;
}

.highlight {
    color: var(--primary-color);
}

.btn-primary {
    display: inline-block;
    background: var(--primary-color);
    color: var(--text-white);
    padding: 1rem 2rem;
    text-decoration: none;
    border-radius: var(--border-radius);
    font-weight: bold;
    transition: var(--transition);
}

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

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-image img {
    max-width: 100%;
    height: auto;
}

/* 服务项目 */
.services {
    background: var(--background-light);
    padding: 80px 0;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.service-card {
    background: var(--background-dark);
    color: var(--text-white);
    padding: 2rem;
    border-radius: var(--border-radius);
    text-align: center;
    transition: var(--transition);
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow);
}

.service-icon {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.service-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.service-card p {
    color: #ccc;
}

/* 热门产品 */
.hot-products {
    background: var(--background-dark);
    padding: 80px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
    color: var(--text-white);
}

.section-icon {
    font-size: 2rem;
    color: var(--accent-color);
    margin-bottom: 1rem;
}

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.section-header p {
    color: #ccc;
    font-size: 1.1rem;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.product-card {
    border-radius: var(--border-radius);
    overflow: hidden;
    position: relative;
    transition: var(--transition);
}

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

.product-image {
    position: relative;
    overflow: hidden;
    height: 200px;
    background: linear-gradient(45deg, #4CAF50, #2196F3);
}

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

.product-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.8));
    padding: 2rem 1rem 1rem;
    color: var(--text-white);
    display: flex;
    justify-content: center;
    align-items: end;
    flex-direction: column;
    gap: 1rem;
}

.product-label {
    font-weight: bold;
    font-size: 1.1rem;
    text-align: center;
    width: 100%;
}

.btn-secondary {
    background: var(--primary-color);
    color: var(--text-white);
    border: none;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    opacity: 0;
    transform: translateY(10px);
}

/* 鼠标移入时显示按钮 */
.product-card:hover .btn-secondary {
    opacity: 1;
    transform: translateY(0);
}

.btn-secondary:hover {
    background: var(--secondary-color);
}

/* 热门推荐 */
.hot-recommendations {
    background: var(--background-light);
    padding: 80px 0;
}

.recommendations-slider {
    position: relative;
    display: flex;
    align-items: center;
    gap: 2rem;
}

.slider-btn {
    background: var(--primary-color);
    color: var(--text-white);
    border: none;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
}

.slider-btn:hover {
    background: var(--secondary-color);
}

.recommendations-container {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    flex: 1;
}

.recommendation-card {
    background: var(--primary-color);
    border-radius: var(--border-radius);
    overflow: hidden;
    color: var(--text-white);
}

.recommendation-content {
    display: flex;
    align-items: center;
    padding: 2rem;
    gap: 2rem;
}

.recommendation-text h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.recommendation-text ul {
    list-style: none;
}

.recommendation-text li {
    padding: 0.25rem 0;
}

.recommendation-text li:before {
    content: "• ";
    color: var(--accent-color);
    font-weight: bold;
}

.recommendation-image {
    flex-shrink: 0;
    width: 100px;
    height: 100px;
}

.recommendation-image img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

/* 底部插图区域 */
.bottom-illustration {
    background: var(--background-dark);
    padding: 80px 0;
    text-align: center;
}

.bottom-illustration img {
    max-width: 100%;
    height: auto;
}

/* 呼叫行动区域 */
.cta {
    background: var(--background-light);
    padding: 80px 0;
    text-align: center;
    position: relative;
}

.cta h2 {
    font-size: 2.5rem;
    margin-bottom: 2rem;
    color: var(--text-dark);
}

.btn-cta {
    display: inline-block;
    background: var(--accent-color);
    color: var(--text-white);
    padding: 1rem 3rem;
    text-decoration: none;
    border-radius: var(--border-radius);
    font-size: 1.2rem;
    font-weight: bold;
    transition: var(--transition);
    margin-bottom: 2rem;
}

.btn-cta:hover {
    background: #e68900;
    transform: translateY(-2px);
}

.cta-illustration img {
    max-width: 100%;
    height: auto;
}

/* 页脚 */
.footer {
    background: var(--background-dark);
    color: var(--text-white);
    padding: 3rem 0 1rem;
}

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

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: bold;
    margin-bottom: 1rem;
}

.footer-logo i {
    color: var(--accent-color);
}

.footer-section h4 {
    margin-bottom: 1rem;
    color: var(--primary-color);
}

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

.footer-section li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: #ccc;
    text-decoration: none;
    transition: var(--transition);
}

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 2rem 0;
    border-top: 1px solid #444;
}

.footer-social {
    display: flex;
    gap: 1rem;
}

.footer-social a {
    color: #ccc;
    font-size: 1.5rem;
    transition: var(--transition);
}

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

.footer-language {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: #ccc;
}

.footer-copyright {
    text-align: center;
    padding-top: 1rem;
    border-top: 1px solid #444;
    color: #999;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .nav-toggle {
        display: block;
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .products-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }
    
    .recommendations-container {
        grid-template-columns: 1fr;
    }
    
    .slider-btn {
        display: none;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 1rem;
    }
    
    .section-header h2 {
        font-size: 2rem;
    }
    
    .cta h2 {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.5rem;
    }
    
    .products-grid {
        grid-template-columns: 1fr;
    }
    
    .recommendation-content {
        flex-direction: column;
        text-align: center;
    }
}