/* 全局样式 */
:root {
    --primary-color: #0071e3;
    --secondary-color: #1d1d1f;
    --light-gray: #f5f5f7;
    --dark-gray: #86868b;
    --text-color: #1d1d1f;
    --white: #ffffff;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    color: var(--text-color);
    line-height: 1.6;
    background-color: var(--white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    letter-spacing: -0.5px;
}

h1 {
    font-size: 3.5rem;
    line-height: 1.1;
    font-weight: 700;
}

h2 {
    font-size: 2.5rem;
    line-height: 1.2;
    font-weight: 700;
}

p {
    font-size: 1.1rem;
}

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

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 12px 28px;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--white);
}

.btn-primary:hover {
    background-color: #0062cc;
    transform: scale(1.02);
}

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

.btn-secondary:hover {
    background-color: rgba(0, 113, 227, 0.1);
    transform: scale(1.02);
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 15px 0;
    transition: all 0.3s ease;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.navbar.scrolled {
    padding: 10px 0;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
}

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

.logo a {
    font-size: 1.6rem;
    font-weight: 600;
    color: var(--text-color);
    letter-spacing: -0.5px;
}

.nav-links {
    display: flex;
    gap: 30px;
}

.nav-links a {
    color: var(--text-color);
    font-size: 1rem;
    transition: color 0.3s ease;
    position: relative;
    padding: 5px 0;
}

.nav-links a:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: width 0.3s ease;
}

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

.nav-links a:hover, 
.nav-links a.active {
    color: var(--primary-color);
}

.menu-toggle {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
}

/* 英雄区 */
.hero {
    padding: 180px 0 100px;
    background: linear-gradient(135deg, #f5f5f7 0%, #fafafa 100%);
    text-align: center;
}

.hero h1 {
    margin-bottom: 20px;
}

.hero p {
    margin-bottom: 40px;
    color: var(--dark-gray);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
}

/* 特性区 */
.features {
    padding: 120px 0;
    background-color: var(--white);
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    margin-bottom: 15px;
}

.section-header p {
    color: var(--dark-gray);
    max-width: 700px;
    margin: 0 auto;
    font-size: 1.2rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.feature-card {
    text-align: center;
    padding: 40px 30px;
    border-radius: 16px;
    background-color: white;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

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

.feature-icon {
    margin-bottom: 25px;
}

.feature-icon i {
    font-size: 2.5rem;
    color: var(--primary-color);
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    font-weight: 600;
}

.feature-card p {
    color: var(--dark-gray);
    line-height: 1.6;
}

/* 产品预览 */
.products-preview {
    padding: 100px 0;
    background-color: var(--light-gray);
}

.product-carousel {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
    margin-bottom: 60px;
}

.product-card {
    background-color: var(--white);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.product-card:hover {
    transform: translateY(-10px);
}

.product-image {
    height: 200px;
    background-size: cover;
    background-position: center;
}

.product-info {
    padding: 25px;
}

.product-info h3 {
    margin-bottom: 10px;
}

.product-info p {
    color: var(--dark-gray);
    margin-bottom: 15px;
}

.learn-more {
    color: var(--primary-color);
    font-weight: 500;
    display: inline-block;
    transition: transform 0.3s ease;
}

.learn-more:hover {
    transform: translateX(5px);
}

/* 呼叫行动 */
.call-to-action {
    padding: 120px 0;
    background-color: var(--secondary-color);
    color: var(--white);
    text-align: center;
}

.call-to-action h2 {
    font-size: 2.8rem;
    font-weight: 700;
    margin-bottom: 25px;
    letter-spacing: -0.5px;
}

.call-to-action p {
    font-size: 1.3rem;
    max-width: 700px;
    margin: 0 auto 40px;
    color: rgba(255, 255, 255, 0.9);
}

/* 页脚 */
footer {
    background-color: var(--white);
    padding: 100px 0 40px;
    color: var(--text-color);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 50px;
}

.footer-info h3 {
    font-size: 1.8rem;
    font-weight: 600;
    margin-bottom: 20px;
}

.footer-info p {
    color: var(--dark-gray);
    margin-bottom: 25px;
    font-size: 1.1rem;
    line-height: 1.7;
}

.social-links {
    display: flex;
    gap: 15px;
}

.social-links a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--light-gray);
    border-radius: 50%;
    transition: all 0.3s ease;
}

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

.footer-links h4, 
.footer-contact h4 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 25px;
}

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

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

.footer-links a {
    color: var(--dark-gray);
    transition: all 0.3s ease;
}

.footer-links a:hover {
    color: var(--primary-color);
    padding-left: 5px;
}

.footer-contact p {
    display: flex;
    align-items: center;
    margin-bottom: 15px;
    color: var(--dark-gray);
}

.footer-contact i {
    margin-right: 10px;
    color: var(--primary-color);
}

.footer-bottom {
    border-top: 1px solid #f0f0f0;
    padding-top: 40px;
    margin-top: 40px;
    text-align: center;
}

.footer-bottom p {
    color: var(--dark-gray);
    font-size: 0.9rem;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .group-content {
        grid-template-columns: 1fr;
    }
    
    .group-image {
        margin-bottom: 30px;
    }
}

@media (max-width: 768px) {
    .partner-logos {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .stat-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    h1 {
        font-size: 2.5rem;
    }
    
    h2 {
        font-size: 2rem;
    }
    
    .nav-links {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        flex-direction: column;
        background-color: var(--white);
        box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
        padding: 20px;
        gap: 15px;
        border-radius: 0 0 16px 16px;
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .menu-toggle {
        display: block;
    }
    
    .hero {
        padding: 150px 0 80px;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .language-switcher {
        margin: 10px 0;
    }
}

@media (max-width: 576px) {
    .product-grid {
        grid-template-columns: 1fr;
    }
    
    .partners {
        padding: 60px 0;
    }
    
    .partner-logos {
        gap: 20px;
    }
    
    .group-intro {
        padding: 60px 0;
    }
    
    .features, .product-preview, .call-to-action {
        padding: 60px 0;
    }
    
    .section-header p {
        font-size: 1rem;
    }
}

/* 首页集团概况部分 */
.group-intro {
    padding: 120px 0;
    background-color: var(--light-gray);
}

.group-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
    margin-top: 60px;
}

.group-image {
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

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

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

.group-info p {
    margin-bottom: 25px;
    line-height: 1.7;
    font-size: 1.1rem;
}

.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 20px;
    margin-top: 40px;
}

.stat-item {
    background-color: white;
    border-radius: 16px;
    padding: 30px 20px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.07);
    transition: transform 0.3s ease;
}

.stat-item:hover {
    transform: translateY(-5px);
}

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 5px;
}

.stat-text {
    font-size: 1rem;
    color: var(--dark-gray);
}

/* 合作伙伴部分 */
.partners {
    padding: 120px 0;
    background-color: var(--light-gray);
}

.partner-logos {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 30px;
    margin-top: 60px;
}

.partner-logo {
    background-color: white;
    border-radius: 16px;
    padding: 25px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.07);
    height: 100px;
    transition: transform 0.3s;
}

.partner-logo:hover {
    transform: translateY(-5px);
}

.partner-logo img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

/* 查看更多按钮 */
.view-more {
    text-align: center;
    margin-top: 60px;
}

/* 首页产品展示网格 */
.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 60px;
}

.product-card {
    background-color: white;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.product-card:hover {
    transform: translateY(-10px);
}

.product-image {
    height: 280px;
    overflow: hidden;
}

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

.product-card:hover .product-image img {
    transform: scale(1.05);
}

.product-info {
    padding: 30px;
}

.product-info h3 {
    margin-bottom: 15px;
    color: var(--primary-color);
    font-size: 1.6rem;
    font-weight: 600;
}

.product-info p {
    margin-bottom: 25px;
    color: var(--dark-gray);
    line-height: 1.7;
    font-size: 1.1rem;
}

.btn-light {
    background-color: white;
    color: var(--primary-color);
}

.btn-light:hover {
    background-color: #f0f0f0;
}