/* 基础样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Noto Sans SC', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
}

/* 容器样式 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 导航栏样式 */
.main-header {
    background-color: #fff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.logo-menu-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
}

.logo img {
    height: 50px;
}

.main-nav ul {
    display: flex;
    list-style: none;
    gap: 30px;
}

.main-nav a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s;
}

.main-nav a:hover,
.main-nav a.active {
    color: #3498db;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: #333;
}

/* 英雄区域样式 */
.hero {
    background: linear-gradient(135deg, #3498db, #2c3e50);
    color: white;
    padding: 100px 0;
    text-align: center;
}

.hero h2 {
    font-size: 36px;
    margin-bottom: 20px;
    font-weight: 700;
}

.hero p {
    font-size: 18px;
    margin-bottom: 40px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 12px 30px;
    background-color: #3498db;
    color: white;
    text-decoration: none;
    border-radius: 4px;
    font-weight: 500;
    transition: background-color 0.3s;
    border: none;
    cursor: pointer;
}

.btn:hover {
    background-color: #2980b9;
}

.btn-outline {
    background-color: transparent;
    border: 1px solid #3498db;
    color: #3498db;
}

.btn-outline:hover {
    background-color: #3498db;
    color: white;
}

/* 内容区域样式 */
.content-section {
    padding: 80px 0;
    background-color: #fff;
}

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

.section-title h2 {
    font-size: 32px;
    margin-bottom: 15px;
    color: #2c3e50;
}

.section-title p {
    font-size: 16px;
    color: #777;
    max-width: 700px;
    margin: 0 auto;
}

/* 网格布局样式 */
.business-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.business-card {
    background-color: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s, box-shadow 0.3s;
}

.business-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.15);
}

.business-img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.business-content {
    padding: 25px;
}

.business-content h3 {
    font-size: 20px;
    margin-bottom: 15px;
    color: #2c3e50;
}

.business-content p {
    color: #777;
    margin-bottom: 20px;
    line-height: 1.6;
}

/* 关于我们页面样式 */
.about-content {
    display: flex;
    gap: 40px;
    align-items: flex-start;
    margin-bottom: 60px;
}

.about-img {
    flex: 1;
    min-width: 300px;
    max-width: 500px;
}

.about-img img {
    width: 100%;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.about-text {
    flex: 1;
    min-width: 300px;
}

.about-text h3 {
    font-size: 20px;
    font-weight: 600;
    color: #2c3e50;
    margin-bottom: 15px;
}

.about-text p {
    color: #555;
    line-height: 1.8;
    margin-bottom: 20px;
}

/* 联系我们页面样式 */
.contact-container {
    display: flex;
    gap: 40px;
    align-items: flex-start;
}

.contact-info {
    flex: 1;
    min-width: 300px;
}

.contact-form {
    flex: 1;
    min-width: 300px;
}

.contact-cards .business-card {
    transition: all 0.3s ease;
}

.contact-cards .business-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.contact-detail {
    display: flex;
    align-items: flex-start;
    margin-bottom: 25px;
    padding: 20px;
    background-color: #f8f9fa;
    border-radius: 8px;
    transition: background-color 0.3s;
}

.contact-detail:hover {
    background-color: #e8f4fc;
}

.contact-detail i {
    color: #3498db;
    font-size: 24px;
    margin-right: 20px;
    margin-top: 5px;
    flex-shrink: 0;
}

.contact-detail h4 {
    color: #2c3e50;
    margin-bottom: 10px;
    font-size: 18px;
}

.contact-detail p {
    color: #555;
    line-height: 1.6;
}

/* 表单样式 */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #2c3e50;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 16px;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #3498db;
}

.form-group textarea {
    resize: vertical;
    min-height: 150px;
}

/* 留言页面样式 */
.message-form {
    max-width: 700px;
    margin: 0 auto;
    background-color: #fff;
    padding: 40px;
    border-radius: 8px;
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.1);
}

/* 发展历程样式 */
#history .business-card {
    background-color: #ffffff;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

#history .business-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

/* 核心竞争力样式 */
#core-competence .business-card {
    transition: all 0.3s ease;
}

#core-competence .business-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

/* 服务理念样式 */
#service-philosophy {
    padding: 60px 0;
}

/* 页脚样式 */
.main-footer {
    background-color: #2c3e50;
    color: white;
    padding: 60px 0;
}

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

.footer-section h3 {
    font-size: 18px;
    margin-bottom: 20px;
    color: #3498db;
}

.footer-section p,
.footer-section li {
    color: #ddd;
    line-height: 1.6;
    margin-bottom: 10px;
}

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

.footer-section a {
    color: #ddd;
    text-decoration: none;
    transition: color 0.3s;
}

.footer-section a:hover {
    color: #3498db;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    margin-top: 30px;
    border-top: 1px solid #34495e;
    color: #aaa;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .about-content {
        flex-direction: column;
        gap: 30px;
    }
    
    .about-img,
    .about-text {
        width: 100%;
        max-width: 100%;
    }
    
    .contact-container {
        flex-direction: column;
        gap: 30px;
    }
    
    .contact-info,
    .contact-form {
        width: 100%;
        max-width: 100%;
    }
}

@media (max-width: 768px) {
    .logo-menu-container {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }
    
    .main-nav {
        width: 100%;
    }
    
    .main-nav ul {
        flex-direction: column;
        gap: 10px;
    }
    
    .main-nav ul li {
        width: 100%;
    }
    
    .main-nav ul li a {
        display: block;
        padding: 10px 0;
    }
    
    .mobile-menu-btn {
        display: block;
        position: absolute;
        top: 20px;
        right: 20px;
    }
    
    .main-nav {
        display: none;
    }
    
    .main-nav.active {
        display: block;
    }
    
    .hero h2 {
        font-size: 28px;
    }
    
    .hero p {
        font-size: 16px;
    }
    
    .content-section {
        padding: 60px 0;
    }
    
    .section-title h2 {
        font-size: 28px;
    }
    
    .business-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-detail {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .contact-detail i {
        margin-bottom: 10px;
    }
    
    .message-form {
        padding: 20px;
    }
}

@media (max-width: 576px) {
    .container {
        padding: 0 15px;
    }
    
    .hero {
        padding: 80px 0;
    }
    
    .hero h2 {
        font-size: 24px;
    }
    
    .btn {
        padding: 10px 20px;
        font-size: 14px;
    }
    
    .content-section {
        padding: 40px 0;
    }
    
    .section-title h2 {
        font-size: 24px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
}

/* 状态标签样式 */
.status-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
}

.status-unread {
    background-color: #f39c12;
    color: white;
}

.status-read {
    background-color: #3498db;
    color: white;
}

.status-replied {
    background-color: #27ae60;
    color: white;
}

/* 错误和成功消息样式 */
.alert {
    padding: 15px;
    border-radius: 4px;
    margin-bottom: 20px;
    font-weight: 500;
}

.alert-success {
    background-color: #27ae60;
    color: white;
}

.alert-error {
    background-color: #e74c3c;
    color: white;
}

.alert-info {
    background-color: #3498db;
    color: white;
}

/* 加载动画 */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid #f3f3f3;
    border-top: 2px solid #3498db;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* 表格样式 */
.data-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 30px;
}

.data-table th,
.data-table td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid #ddd;
}

.data-table th {
    background-color: #f8f9fa;
    font-weight: 600;
    color: #2c3e50;
}

.data-table tr:hover {
    background-color: #f5f5f5;
}

/* 分页样式 */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    margin-top: 30px;
}

.page-link {
    display: inline-block;
    padding: 8px 16px;
    background-color: #f8f9fa;
    color: #333;
    text-decoration: none;
    border-radius: 4px;
    transition: background-color 0.3s;
}

.page-link:hover {
    background-color: #e9ecef;
}

.page-link.active {
    background-color: #3498db;
    color: white;
}

/* 工具提示样式 */
.tooltip {
    position: relative;
    display: inline-block;
}

.tooltip .tooltiptext {
    visibility: hidden;
    width: 120px;
    background-color: #333;
    color: #fff;
    text-align: center;
    border-radius: 6px;
    padding: 5px;
    position: absolute;
    z-index: 1;
    bottom: 125%;
    left: 50%;
    margin-left: -60px;
    opacity: 0;
    transition: opacity 0.3s;
}

.tooltip:hover .tooltiptext {
    visibility: visible;
    opacity: 1;
}

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

.fade-in {
    animation: fadeIn 0.6s ease-out;
}

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

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: #888;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #555;
}