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

a{
    text-decoration: none;
}

body {
    font-family: 'Arial', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
}

/* 导航条样式 */
.navbar {
    background: #2c3e50;
    color: white;
    padding: 1rem 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 2rem;
}

.nav-logo h2 {
    color: #3498db;
    font-size: 1.8rem;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-link {
    color: white;
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    transition: background-color 0.3s;
}

.nav-link:hover {
    background-color: #34495e;
}

/* 移动端面包屑导航按钮 */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    padding: 5px;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background: white;
    margin: 3px 0;
    transition: 0.3s;
}

/* 面包屑导航按钮动画效果 */
.mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(-45deg) translate(-5px, 6px);
}

.mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(45deg) translate(-5px, -6px);
}

/* 主容器 */
.container {
    max-width: 1200px;
    margin: 80px auto 0;
    padding: 2rem;
}

/* 区域样式 - 修改为所有区域直接显示 */
.section {
    display: block;
    padding: 3rem 0;
    border-bottom: 1px solid #e0e0e0;
}

.section:last-child {
    border-bottom: none;
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-header h1, .section-header h2 {
    color: #2c3e50;
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.section-header p {
    color: #7f8c8d;
    font-size: 1.2rem;
}

/* 功能区网格布局 */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.feature-card {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    text-align: center;
    transition: transform 0.3s;
}

.feature-card:hover {
    transform: translateY(-5px);
}

.feature-card h3 {
    color: #2c3e50;
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.feature-card p {
    color: #7f8c8d;
    margin-bottom: 1rem;
}

.feature-card ul {
    list-style: none;
    text-align: left;
}

.feature-card li {
    padding: 0.3rem 0;
    color: #7f8c8d;
}

.feature-card li:before {
    content: "✓ ";
    color: #27ae60;
    font-weight: bold;
}

/* 联系区域样式 */
.contact-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    margin-top: 2rem;
}

.contact-form, .contact-info {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.contact-form h3, .contact-info h3 {
    color: #2c3e50;
    margin-bottom: 1.5rem;
    text-align: center;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: #2c3e50;
    font-weight: bold;
}

.form-group input, .form-group textarea {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 1rem;
}

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

.submit-btn {
    background: #3498db;
    color: white;
    padding: 1rem 2rem;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
    width: 100%;
    transition: background-color 0.3s;
}

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

/* 表单提示信息样式 */
.form-message {
    margin-top: 1rem;
    padding: 0.8rem;
    border-radius: 4px;
    text-align: center;
    font-weight: bold;
    display: none;
}

.form-message.success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
    display: block;
}

.form-message.error {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
    display: block;
}

.contact-item {
    margin-bottom: 1rem;
    padding: 0.8rem;
    background: #f8f9fa;
    border-radius: 4px;
}

.contact-item strong {
    color: #2c3e50;
}

/* 页脚样式 */
.footer {
    background: #2c3e50;
    color: white;
    text-align: center;
    padding: 2rem 0;
    margin-top: 3rem;
}

.footer-content p {
    margin: 0;
}

/* 响应式设计 */
@media (max-width: 768px) {
    /* 移动端导航栏样式 */
    .nav-container {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
        padding: 0 1rem;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: #2c3e50;
        flex-direction: column;
        align-items: center;
        justify-content: flex-start;
        gap: 0;
        transition: left 0.3s ease;
        padding-top: 2rem;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-menu li {
        width: 100%;
        text-align: center;
        margin: 0.5rem 0;
    }
    
    .nav-link {
        display: block;
        padding: 1rem 2rem;
        width: 100%;
        border-radius: 0;
        border-bottom: 1px solid #34495e;
    }
    
    .nav-link:hover {
        background-color: #34495e;
    }
    
    .container {
        margin-top: 120px;
        padding: 1rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-container {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .section-header h1, .section-header h2 {
        font-size: 2rem;
    }
}

/* 桌面端样式 */
@media (min-width: 769px) {
    .mobile-menu-toggle {
        display: none;
    }
    
    .nav-menu {
        display: flex !important;
        position: static;
        width: auto;
        height: auto;
        flex-direction: row;
        background: transparent;
        padding-top: 0;
    }
    
    .nav-menu li {
        width: auto;
        margin: 0;
    }
    
    .nav-link {
        padding: 0.5rem 1rem;
        border-radius: 4px;
        border-bottom: none;
    }
}