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

:root {
    --bg-primary: #ffffff;
    --bg-secondary: #f8f8f8;
    --bg-card: #ffffff;
    --text-primary: #1a1a1a;
    --text-secondary: #666666;
    --text-muted: #999999;
    --accent: #1a1a1a;
    --border: #e5e5e5;
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--text-primary);
}

.logo-icon {
    font-size: 24px;
    color: var(--text-primary);
}

.logo-text {
    font-size: 18px;
    font-weight: 600;
    letter-spacing: 2px;
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.menu-toggle span {
    width: 25px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 40px;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 13px;
    font-weight: 500;
    letter-spacing: 1px;
    text-transform: uppercase;
    transition: var(--transition);
    position: relative;
}

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

/* 语言切换按钮 */
.lang-switch a {
    padding: 6px 12px;
    border: 1px solid var(--border);
    border-radius: 4px;
    font-weight: 600;
    transition: var(--transition);
    text-transform: none;
    letter-spacing: 0;
}

.lang-switch a::after {
    display: none;
}

.lang-switch a:hover {
    background: var(--text-primary);
    color: var(--bg-primary);
    border-color: var(--text-primary);
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition);
}

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

/* 主要内容 */
.main-content {
    padding-top: 70px;
    width: 100%;
}

/* 容器 */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 40px;
    width: 100%;
}

/* Hero 区域 */
.hero-section {
    padding: 80px 40px;
    text-align: center;
    width: 100%;
}

.hero-section .container {
    max-width: 1200px;
    margin: 0 auto;
}

.hero-logo {
    margin-bottom: 60px;
}

.logo-placeholder {
    width: 80px;
    height: 80px;
    margin: 0 auto;
    border: 2px solid var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 36px;
}

/* 数据统计 */
.stats-grid {
    display: flex;
    justify-content: center;
    gap: 80px;
    margin-bottom: 50px;
    flex-wrap: wrap;
}

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

.stat-number {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 8px;
    margin-bottom: 10px;
}

.stat-number .number {
    font-size: 48px;
    font-weight: 700;
    line-height: 1;
    letter-spacing: -2px;
}

.stat-number .unit {
    font-size: 24px;
    font-weight: 300;
    color: var(--text-secondary);
}

.stat-number .highlight {
    color: var(--text-primary);
    font-size: 42px;
}

.stat-label {
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--text-secondary);
}

.hero-description {
    max-width: 600px;
    margin: 0 auto;
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.8;
}

/* 图片画廊 */
.gallery-section {
    padding: 40px 0;
    width: 100%;
}

.gallery-section .container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 40px;
}

.gallery-grid {
    max-width: 1400px;
    margin: 0 auto 20px;
    padding: 0 40px;
}

.gallery-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-bottom: 20px;
}

.gallery-item {
    position: relative;
    overflow: hidden;
    aspect-ratio: 3/2;
    background: var(--bg-secondary);
}

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

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

.feature-image {
    max-width: 1400px;
    margin: 40px auto;
    overflow: hidden;
    padding: 0 40px;
}

.feature-image img {
    width: 100%;
    height: auto;
    display: block;
}

.feature-image img {
    width: 100%;
    height: auto;
    display: block;
}

.gallery-grid.secondary .gallery-row {
    grid-template-columns: repeat(2, 1fr);
}

/* 产品展示区域 */
.product-showcase {
    max-width: 1400px;
    margin: 80px auto;
    padding: 0 40px;
}

.section-title {
    font-size: 36px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 15px;
    letter-spacing: -1px;
}

.section-subtitle {
    font-size: 16px;
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: 50px;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 25px;
}

.product-item {
    position: relative;
    overflow: hidden;
    aspect-ratio: 4/3;
    background: var(--bg-secondary);
    border-radius: 8px;
}

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

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

.product-label {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0,0,0,0.7));
    color: white;
    padding: 20px 15px 15px;
    font-size: 14px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* 合作伙伴区域 */
.partners-section {
    padding: 100px 40px;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    width: 100%;
}

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

.partners-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 30px;
    margin-top: 50px;
}

.partner-logo {
    background: white;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 30px 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 700;
    color: var(--text-secondary);
    letter-spacing: 1px;
    transition: var(--transition);
    min-height: 80px;
}

.partner-logo:hover {
    border-color: var(--text-primary);
    color: var(--text-primary);
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

/* 响应式设计补充 */
@media (max-width: 1024px) {
    .product-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .partners-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .product-showcase {
        padding: 0 20px;
        margin: 60px auto;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .product-grid {
        grid-template-columns: 1fr;
    }
    
    .partners-section {
        padding: 60px 20px;
    }
    
    .partners-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
    }
    
    .partner-logo {
        padding: 20px 15px;
        font-size: 12px;
        min-height: 60px;
    }
}

/* 联系我们 */
.contact-section {
    padding: 120px 40px;
    text-align: center;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    width: 100%;
}

.contact-section .contact-title {
    color: var(--text-primary);
}

.contact-section .contact-subtitle {
    color: var(--text-secondary);
}

.contact-container {
    max-width: 800px;
    margin: 0 auto;
    width: 100%;
}

.contact-title {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 30px;
    letter-spacing: -1px;
}

.contact-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.contact-info {
    margin-top: 50px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    align-items: center;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 15px;
    text-decoration: none;
    color: var(--text-primary);
    font-size: 20px;
    font-weight: 600;
    transition: var(--transition);
}

.contact-item:hover {
    color: var(--text-muted);
}

.contact-icon {
    font-size: 24px;
}

/* 页脚 */
.footer {
    padding: 60px 40px;
    background: var(--bg-primary);
    border-top: 1px solid var(--border);
    width: 100%;
}

.footer-container {
    max-width: 1400px;
    margin: 0 auto;
    text-align: center;
    width: 100%;
}

.footer-logos {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-logo {
    width: 50px;
    height: 50px;
    border: 1px solid var(--border);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 18px;
    transition: var(--transition);
}

.footer-logo:hover {
    border-color: var(--text-primary);
    color: var(--text-primary);
    background: var(--text-primary);
}

.copyright {
    font-size: 13px;
    color: var(--text-muted);
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .stats-grid {
        gap: 50px;
    }
    
    .stat-number .number {
        font-size: 36px;
    }
    
    .gallery-row {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-container {
        padding: 0 20px;
    }
    
    .menu-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--bg-primary);
        flex-direction: column;
        padding: 40px;
        gap: 30px;
        border-bottom: 1px solid var(--border);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .hero-section {
        padding: 60px 20px;
    }
    
    .stats-grid {
        flex-direction: column;
        gap: 40px;
    }
    
    .stat-number .number {
        font-size: 42px;
    }
    
    .gallery-section {
        padding: 20px;
    }
    
    .gallery-row {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .contact-section {
        padding: 80px 20px;
    }
    
    .contact-title {
        font-size: 32px;
    }
}

/* 动画效果 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-content > * {
    animation: fadeIn 0.8s ease forwards;
}

.hero-content > *:nth-child(1) { animation-delay: 0.1s; }
.hero-content > *:nth-child(2) { animation-delay: 0.2s; }
.hero-content > *:nth-child(3) { animation-delay: 0.3s; }

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}