/* 基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Microsoft YaHei", sans-serif;
}

:root {
    --primary-color: #003366; /* 科技深蓝 */
    --accent-color: #00ffcc;  /* 荧光绿 */
    --text-light: #f4f4f4;
    --text-dark: #333;
}

body {
    line-height: 1.6;
    color: var(--text-dark);
}

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

/* 导航栏 */
.navbar {
    background: var(--primary-color);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

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

.logo {
    color: white;
    font-size: 1.5rem;
    font-weight: bold;
}

.logo span {
    font-size: 0.8rem;
    margin-left: 10px;
    color: var(--accent-color);
}

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

.nav-links li a {
    color: white;
    text-decoration: none;
    padding: 0 15px;
    transition: 0.3s;
}

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

/* 英雄区 (Hero Section) */
.hero {
    height: 70vh;
    background: linear-gradient(rgba(0,51,102,0.8), rgba(0,51,102,0.8)), 
                url('https://images.unsplash.com/photo-1518770660439-4636190af475?auto=format&fit=crop&w=1350&q=80') center/cover;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: white;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
}

.btn {
    background: var(--accent-color);
    color: var(--primary-color);
    padding: 12px 30px;
    text-decoration: none;
    font-weight: bold;
    border-radius: 5px;
}

/* 应用场景卡片 */
.applications {
    padding: 80px 0;
    background: #f9f9f9;
}

.section-title {
    text-align: center;
    margin-bottom: 50px;
    font-size: 2rem;
    color: var(--primary-color);
}

.app-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.app-card {
    background: white;
    padding: 40px 20px;
    text-align: center;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    transition: transform 0.3s;
}

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

.app-card i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.app-card h3 {
    margin-bottom: 15px;
}

/* 页脚 */
footer {
    background: var(--primary-color);
    color: white;
    text-align: center;
    padding: 30px 0;
}
/* 产品页面专用样式 */
.page-header {
    background: var(--primary-color);
    color: white;
    padding: 60px 0;
    text-align: center;
}

.product-section {
    padding: 50px 0;
}

.product-category {
    margin-bottom: 40px;
    border-left: 5px solid var(--accent-color);
    padding-left: 20px;
}

.product-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}

.product-table th, .product-table td {
    border: 1px solid #ddd;
    padding: 12px;
    text-align: left;
}

.product-table th {
    background: #f4f4f4;
    color: var(--primary-color);
}

/* 按钮点击反馈 */
.btn-small {
    padding: 5px 15px;
    background: var(--primary-color);
    color: white;
    text-decoration: none;
    font-size: 0.9rem;
    border-radius: 3px;
}/* 应用案例展示区 */
.applications-showcase {
    background: #f0f8ff; /* 淡蓝色背景，更具科技感 */
    padding: 80px 0;
}

.case-study {
    display: flex;
    align-items: center;
    gap: 40px;
    margin-bottom: 60px;
    padding: 30px;
    background: white;
    border-radius: 10px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease-in-out;
}

.case-study:hover {
    transform: translateY(-5px);
}

.case-study.reversed {
    flex-direction: row-reverse; /* 调整图片和文本的顺序 */
}

.case-image {
    flex: 1;
    min-width: 300px; /* 确保图片不会太小 */
}

.case-image img {
    width: 100%;
    height: auto;
    border-radius: 8px;
    object-fit: cover;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
}

.case-content {
    flex: 2;
}

.case-content h3 {
    font-size: 1.8rem;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.case-content p {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 20px;
    color: #555;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .case-study, .case-study.reversed {
        flex-direction: column;
        text-align: center;
        gap: 20px;
        padding: 20px;
    }

    .case-image {
        min-width: unset;
        width: 100%; /* 小屏幕下图片宽度占满 */
    }

    .case-content {
        flex: auto;
    }
}
/* 联系页面布局 */
.contact-section {
    padding: 80px 0;
    background: #fff;
}

.contact-wrapper {
    display: flex;
    gap: 60px;
    align-items: flex-start;
}

.contact-info, .contact-form {
    flex: 1;
}

.contact-info h3, .contact-form h3 {
    font-size: 1.8rem;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.subtitle {
    margin-bottom: 30px;
    color: #666;
}

/* 联系信息卡片 */
.info-card {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 25px;
    padding: 20px;
    background: #f8f9fa;
    border-radius: 8px;
    transition: 0.3s;
}

.info-card i {
    font-size: 1.5rem;
    color: var(--primary-color);
    width: 30px;
}

.wechat-card {
    border: 2px solid var(--accent-color); /* 突出显示微信 */
    background: #f0fffb;
}

.wechat-card i {
    color: #07c160; /* 微信绿 */
}

.wechat-id {
    font-size: 1.2rem;
    font-weight: bold;
    color: #333;
}

.contact-person {
    color: #666;
}

/* 表单样式 */
.form-group {
    margin-bottom: 15px;
}

.form-group input, .form-group select, .form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 1rem;
}

.contact-form .btn {
    width: 100%;
    border: none;
    cursor: pointer;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .contact-wrapper {
        flex-direction: column;
    }
}
/* 补丁：解决手机端导航和标题过大的问题 */
@media (max-width: 768px) {
    .nav-links {
        display: none; /* 简易处理：手机端隐藏导航，或改为垂直排列 */
    }
    
    .hero h1 {
        font-size: 1.8rem; /* 缩小手机端标题字体 */
    }

    .hero {
        height: 50vh; /* 缩小手机端首图高度 */
    }

    .contact-wrapper {
        gap: 30px; /* 缩小联系页面间距 */
    }
}

/* 补丁：图片悬停效果优化 */
.case-image img {
    display: block; /* 消除图片下方微小间隙 */
}
.lang-switch a {
    color: var(--accent-color) !important;
    font-weight: bold;
    border: 1px solid var(--accent-color);
    padding: 5px 10px !important;
    border-radius: 4px;
    margin-left: 10px;
}