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

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

/* 导航栏样式 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    padding: 1rem 5%;
    background: rgba(255, 255, 255, 0.95);
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    z-index: 1000;
}

.logo img {
    height: 40px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
}

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

.nav-links a:hover {
    color: #007AFF;
}

.cta-button {
    background: #007AFF;
    color: white;
    border: none;
    padding: 0.8rem 1.5rem;
    border-radius: 5px;
    cursor: pointer;
    font-weight: 500;
    transition: background-color 0.3s;
}

.cta-button:hover {
    background: #0056b3;
}

/* 首页区域样式 */
.hero {
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 0 5%;
    background-color: #f8f9fa;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    font-weight: 700;
}

.hero .subtitle {
    font-size: 1.5rem;
    color: #666;
    max-width: 800px;
    margin-bottom: 2rem;
}

.scroll-down {
    position: absolute;
    bottom: 2rem;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-20px);
    }
    60% {
        transform: translateY(-10px);
    }
}

/* 通用部分样式 */
.section {
    padding: 80px 5%;
}

.section h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
}

/* 简介部分样式 */
.intro-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.intro-text p {
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
}

.intro-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    text-align: center;
}

.stat-item {
    padding: 2rem;
    background: #f8f9fa;
    border-radius: 10px;
}

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: #007AFF;
}

/* 案例展示样式 */
.case-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.case-card {
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 2px 15px rgba(0,0,0,0.1);
    transition: transform 0.3s;
}

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

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

.case-info {
    padding: 1.5rem;
}

/* 团队介绍样式 */
.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.team-card {
    text-align: center;
    padding: 2rem;
    background: white;
    border-radius: 10px;
    box-shadow: 0 2px 15px rgba(0,0,0,0.1);
}

.team-card img {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    margin-bottom: 1rem;
}

.expertise span {
    display: inline-block;
    padding: 0.3rem 0.8rem;
    background: #f0f0f0;
    border-radius: 20px;
    margin: 0.3rem;
    font-size: 0.9rem;
}

/* 联系部分样式 */
.contact-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.contact-form form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.contact-form input,
.contact-form textarea {
    padding: 1rem;
    border: 1px solid #ddd;
    border-radius: 5px;
}

.map {
    height: 200px;
    background: #f0f0f0;
    margin: 1rem 0;
    border-radius: 5px;
}

/* 提交BP部分样式 */
.bp-form {
    max-width: 800px;
    margin: 0 auto;
}

.upload-area {
    border: 2px dashed #ddd;
    padding: 2rem;
    text-align: center;
    border-radius: 10px;
    margin: 2rem 0;
    cursor: pointer;
}

.upload-area:hover {
    border-color: #007AFF;
}

/* 页脚样式 */
.footer {
    background: #333;
    color: white;
    padding: 2rem 5%;
    margin-top: 4rem;
}

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

.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background: #007AFF;
    color: white;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: none;
    cursor: pointer;
    display: none;
}

.back-to-top.visible {
    display: block;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .intro-content,
    .contact-container {
        grid-template-columns: 1fr;
    }
    
    .nav-links {
        display: none;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .section {
        padding: 40px 5%;
    }
}