/* 全局重置 & 基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

html {
    scroll-behavior: smooth;
}

body {
    color: #000;
    background-color: #fff;
    line-height: 1.6;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 12px 24px;
    font-weight: 600;
    text-decoration: none;
    text-transform: uppercase;
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 14px;
}

.btn-primary {
    background-color: #FFD100; /* 黄色按钮 */
    color: #000;
}

.btn-primary:hover {
    background-color: #e6bc00;
}

.btn-secondary {
    background-color: transparent;
    color: #000;
    border: 1px solid #000;
}

.btn-secondary:hover {
    background-color: #000;
    color: #fff;
}

.btn-tertiary {
    background-color: transparent;
    color: #fff;
    border: 1px solid #fff;
}

.btn-tertiary:hover {
    background-color: #fff;
    color: #000;
}

/* 标题样式 */
.section-title {
    font-size: 28px;
    font-weight: 800;
    margin-bottom: 16px;
    text-transform: uppercase;
    position: relative;
    padding-bottom: 12px;
}

.section-title::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 40px;
    height: 3px;
    background-color: #FFD100;
}

.section-title.light {
    color: #fff;
}

.section-title.light::after {
    background-color: #fff;
}

.section-desc {
    font-size: 16px;
    margin-bottom: 24px;
    max-width: 600px;
}

.section-desc.light {
    color: #fff;
}

/* 头部样式 */
.header {
    background-color: #fff;
    padding: 20px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

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

.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: #000;
}

.logo-img {
    height: 40px;
    margin-right: 10px;
}

.logo-text {
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* 桌面端导航 */
.nav-desktop {
    display: block;
}

.nav-list {
    display: flex;
    list-style: none;
}

.nav-item {
    margin-left: 24px;
}

.nav-link {
    text-decoration: none;
    color: #000;
    font-weight: 500;
    font-size: 14px;
    text-transform: uppercase;
    transition: color 0.3s ease;
}

.nav-link:hover {
    color: #FFD100;
}

.nav-link.lang {
    border: 1px solid #000;
    padding: 4px 8px;
}

/* 移动端汉堡菜单 */
.hamburger {
    display: none;
    background: transparent;
    border: none;
    font-size: 24px;
    cursor: pointer;
}

/* 移动端导航 */
.nav-mobile {
    display: none;
    background-color: #fff;
    padding: 20px;
    box-shadow: 0 5px 10px rgba(0,0,0,0.1);
}

.nav-mobile.active {
    display: block;
}

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

.nav-mobile-item {
    margin: 16px 0;
}

.nav-mobile-link {
    text-decoration: none;
    color: #000;
    font-weight: 500;
    font-size: 16px;
    text-transform: uppercase;
}

/* 英雄区样式 */
.hero {

    background-image: url("../images/banner.jpg");
    background-repeat: no-repeat;    /* 不重复 */
    background-size: cover;          /* 铺满整个容器 */
    background-position: center;     /* 图片居中 */



    position: relative;
     height: 500px; 
    /* min-height: 600px; */
}

.hero-container {
    display: flex;
    height: 100%;
    align-items: center;
}

.hero-content {
    flex: 1;
    padding-right: 40px;
}

.hero-numbering {
    display: flex;
    flex-direction: column;
    position: absolute;
    left: 20px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 14px;
    color: #999;
}

.hero-numbering span {
    margin: 8px 0;
}

.hero-title {
    font-size: 64px;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
    text-transform: uppercase;
}

.hero-desc {
    font-size: 18px;
    margin-bottom: 32px;
    max-width: 500px;
}

.hero-image {
    flex: 1;
    height: 100%;
    position: relative;
}

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

.hero-carousel {
    position: absolute;
    bottom: 20px;
    right: 20px;
    display: flex;
    gap: 10px;
}

.carousel-btn {
    background-color: rgba(0,0,0,0.7);
    color: #fff;
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.carousel-btn:hover {
    background-color: #FFD100;
    color: #000;
}

/* 核心优势样式 */
.features {
    padding: 80px 0;
    background-color: #f9f9f9;
}

.features-container {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.feature-item {
    text-align: center;
    padding: 20px;
}

.feature-icon {
    font-size: 32px;
    margin-bottom: 16px;
    color: #000;
}

.feature-title {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 12px;
    text-transform: uppercase;
}

.feature-desc {
    font-size: 14px;
    color: #666;
}

/* 产品展示样式 */
.products {
    padding: 80px 0;
}

.products-header {
    margin-bottom: 40px;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.product-card {
    position: relative;
    overflow: hidden;
}

.product-img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    margin-bottom: 12px;
    transition: transform 0.3s ease;
}

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

.product-name {
    font-size: 16px;
    font-weight: 600;
    text-transform: uppercase;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* 应用场景样式 */
.applications {
    padding: 80px 0;
    background-color: #000;
    color: #fff;
}

.applications-header {
    margin-bottom: 40px;
}

.applications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.application-card {
    position: relative;
    overflow: hidden;
}

.application-img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    margin-bottom: 12px;
    transition: transform 0.3s ease;
}

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

.application-name {
    font-size: 14px;
    font-weight: 600;
    text-transform: uppercase;
    color: #fff;
}

.application-name a{
    text-decoration: none;
    font-size: 14px;
    font-weight: 600;
    text-transform: uppercase;
    color: #fff;
}




/* 选择我们的理由样式 */
.why-choose-us {
    padding: 80px 0;
    background-color: #f9f9f9;
}

.why-choose-us-header {
    margin-bottom: 40px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    text-align: center;
}

.stat-card {
    padding: 20px;
}

.stat-icon {
    font-size: 32px;
    margin-bottom: 16px;
    color: #000;
}

.stat-number {
    font-size: 48px;
    font-weight: 800;
    margin-bottom: 8px;
}

.stat-label {
    font-size: 14px;
    text-transform: uppercase;
    font-weight: 600;
}

/* 页脚样式 */
.footer {
    background-color: #000;
    color: #fff;
    padding: 80px 0 40px;
}

.footer-container {
    display: grid;
    grid-template-columns: 1.2fr 1fr 1fr 1fr 1fr ;
    gap: 10px;
    margin-bottom: 40px;
}

.footer-col {
    padding: 0 10px;
}

.footer-title {
    font-size: 16px;
    font-weight: 700;
    text-transform: uppercase;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 10px;
}

.footer-title::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 30px;
    height: 2px;
    background-color: #FFD100;
}

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

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

.footer-links a {
    color: #ccc;
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: #FFD100;
}

.contact-links li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.contact-links i {
    margin-top: 4px;
    color: #FFD100;
}

.company-info {
    padding-right: 40px;
}

.footer-logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: #fff;
    margin-bottom: 20px;
}

.footer-logo-img {
    height: 40px;
    margin-right: 10px;
}

.footer-logo-text {
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.company-desc {
    font-size: 14px;
    color: #ccc;
    margin-bottom: 20px;
    line-height: 1.8;
}

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

.social-link {
    color: #fff;
    background-color: #333;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    transition: background-color 0.3s ease;
}

.social-link:hover {
    background-color: #FFD100;
    color: #000;
}

.footer-bottom {
    padding-top: 20px;
    border-top: 1px solid #333;
}

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

.copyright {
    font-size: 12px;
    color: #ccc;
}

.legal-links {
    font-size: 12px;
}

.legal-links a {
    color: #ccc;
    text-decoration: none;
    margin: 0 5px;
}

.legal-links a:hover {
    color: #FFD100;
}

/* 响应式适配 */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 48px;
    }
    
    .features-container {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-container {
        grid-template-columns: 2fr 1fr 1fr;
        row-gap: 40px;
    }
}

@media (max-width: 768px) {
    /* 导航适配 */
    .nav-desktop {
        display: none;
    }
    
    .hamburger {
        display: block;
    }
    
    /* 英雄区适配 */
    .hero {
        height: auto;
        padding: 40px 0;
    }
    
    .hero-container {
        flex-direction: column;
    }
    
    .hero-content {
        padding-right: 0;
        margin-bottom: 20px;
        text-align: center;
    }
    
    .hero-title {
        font-size: 36px;
    }
    
    .hero-numbering {
        display: none;
    }
    
    /* 布局适配 */
    .features-container {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-container {
        grid-template-columns: 1fr;
    }
    
    .footer-bottom-container {
        flex-direction: column;
        gap: 10px;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 28px;
    }
    
    .section-title {
        font-size: 24px;
    }
    
    .stat-number {
        font-size: 36px;
    }
}