/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Noto Sans JP', 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f8f8;
}

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

/* 头部样式 */
header {
    background-color: #fff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
}

.logo {
    font-size: 24px;
    font-weight: bold;
    color: #333;
    text-decoration: none;
}

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

/* 汉堡菜单样式 */
.menu-toggle {
    display: none;
    font-size: 24px;
    cursor: pointer;
    color: #333;
}

/* 响应式导航样式 */
.nav-links.active {
    display: flex !important;
}

/* 确保手机模式下激活的导航菜单显示 */
@media (max-width: 768px) {
    .nav-links.active {
        display: flex;
    }
}

/* 菜单打开时调整页面内容 */
body.menu-open {
    overflow: hidden;
    margin-top: 230px; /* 导航菜单的高度 + 顶部间距 */
}

/* 为页面内容添加平滑过渡效果 */
section {
    transition: margin-top 0.3s ease;
}

.nav-links li {
    margin-left: 30px;
}

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

.nav-links a:hover {
    color: #0066cc;
}

/* 英雄区域 */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-align: center;
    padding: 150px 0 100px;
    margin-top: 70px;
}

.hero h1 {
    font-size: 48px;
    margin-bottom: 20px;
    font-weight: 700;
}

.hero p {
    font-size: 20px;
    margin-bottom: 40px;
    opacity: 0.9;
}

.btn {
    display: inline-block;
    background-color: #fff;
    color: #667eea;
    padding: 12px 30px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.btn-secondary {
    background-color: transparent;
    color: #fff;
    border: 2px solid #fff;
    margin-left: 15px;
}

.btn-secondary:hover {
    background-color: #fff;
    color: #667eea;
}

/* 服务部分 */
.services {
    padding: 100px 0;
    background-color: #fff;
}

.section-title {
    text-align: center;
    font-size: 36px;
    margin-bottom: 60px;
    color: #333;
    position: relative;
}

.section-title::after {
    content: '';
    width: 80px;
    height: 3px;
    background-color: #667eea;
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
}

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

/* 为about.html中的理念与使命部分的3个卡片设置居中布局 */
.mission-vision-grid {
    grid-template-columns: repeat(3, 1fr);
    justify-items: center;
}

/* 确保卡片在居中时保持最大宽度 */
.mission-vision-grid .service-card {
    max-width: 100%;
    width: 100%;
}

.service-card {
    background-color: #f8f8f8;
    padding: 40px 30px;
    border-radius: 10px;
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
}

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

.service-card i {
    font-size: 48px;
    color: #667eea;
    margin-bottom: 20px;
}

.service-card h3 {
    font-size: 24px;
    margin-bottom: 15px;
    color: #333;
}

.service-card p {
    color: #666;
    line-height: 1.7;
}

/* 关于我们部分 */
.about {
    padding: 100px 0;
    background-color: #f8f8f8;
}

.about-content {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 50px;
}

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

.about-text h2 {
    font-size: 32px;
    margin-bottom: 20px;
    color: #333;
}

.about-text p {
    margin-bottom: 20px;
    color: #666;
    line-height: 1.8;
}

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

.about-image img {
    width: 100%;
    border-radius: 10px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

/* 联系部分 */
.contact {
    padding: 100px 0;
    background-color: #fff;
}

.contact-content {
    display: flex;
    flex-wrap: wrap;
    gap: 50px;
}

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

.contact-info h3 {
    font-size: 28px;
    margin-bottom: 30px;
    color: #333;
}

.contact-item {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
}

.contact-item i {
    font-size: 24px;
    color: #667eea;
    margin-right: 15px;
    width: 40px;
    text-align: center;
}

.contact-item p {
    color: #666;
}

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

.contact-form h3 {
    font-size: 28px;
    margin-bottom: 30px;
    color: #333;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: #333;
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 16px;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #667eea;
}

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

/* 页脚 */
footer {
    background-color: #333;
    color: #fff;
    padding: 50px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

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

.footer-section p {
    color: #ccc;
    line-height: 1.8;
    margin-bottom: 15px;
}

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

.footer-section ul li {
    margin-bottom: 10px;
}

.footer-section ul li a {
    color: #ccc;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section ul li a:hover {
    color: #667eea;
}

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

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: #444;
    color: #fff;
    border-radius: 50%;
    text-decoration: none;
    transition: all 0.3s ease;
}

.social-links a:hover {
    background-color: #667eea;
    transform: translateY(-2px);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid #444;
    color: #ccc;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 36px;
    }
    
    .hero p {
        font-size: 18px;
    }
    
    .menu-toggle {
        display: block;
    }
    
    .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background-color: #fff;
        padding: 20px;
        box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
        z-index: 1000;
    }
    
    .nav-links li {
        margin-left: 0;
        margin-bottom: 15px;
        text-align: center;
    }
    
    .nav-links li:last-child {
        margin-bottom: 0;
    }
    
    .btn-secondary {
        margin-left: 0;
        margin-top: 15px;
    }
    
    .about-content,
    .contact-content {
        flex-direction: column;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .services-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 120px 0 80px;
    }
    
    .hero h1 {
        font-size: 28px;
    }
    
    .services,
    .about,
    .contact {
        padding: 60px 0;
    }
    
    .service-card {
        padding: 30px 20px;
    }
}