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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* 页眉样式 */
header {
    background: linear-gradient(135deg, #1a237e 0%, #283593 100%);
    color: white;
    padding: 2rem 1.5rem;
    border-radius: 10px;
    margin-bottom: 2rem;
    text-align: center;
}

.logo-container {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
}

.logo {
    font-size: 2.5rem;
    font-weight: 700;
    color: #fff;
    letter-spacing: 1px;
}

h1 {
    font-size: 2.2rem;
    margin-bottom: 0.5rem;
    line-height: 1.2;
}

.tagline {
    font-size: 1.1rem;
    opacity: 0.9;
    max-width: 800px;
    margin: 0 auto;
}

/* 导航样式 */
nav {
    background-color: white;
    border-radius: 8px;
    padding: 1rem;
    margin-bottom: 2rem;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
}

.nav-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    list-style: none;
}

.nav-links li {
    margin: 0.5rem 1rem;
}

.nav-links a {
    text-decoration: none;
    color: #1a237e;
    font-weight: 600;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    transition: background-color 0.3s;
}

.nav-links a:hover {
    background-color: #e8eaf6;
}

/* 主要内容区域 */
.content-section {
    background-color: white;
    border-radius: 8px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
}

h2 {
    color: #1a237e;
    border-bottom: 2px solid #e8eaf6;
    padding-bottom: 0.75rem;
    margin-bottom: 1.5rem;
    font-size: 1.8rem;
}

h3 {
    margin: 1.5rem 0 0.75rem 0;
    font-size: 1.4rem;
}

/* 关键词解释区域 */
.keyword-explanation {
    background-color: #e8eaf6;
    border-left: 4px solid #1a237e;
    padding: 1.5rem;
    margin: 1.5rem 0;
    border-radius: 0 8px 8px 0;
}

.keyword-explanation h3 {
    color: #1a237e;
}

/* 问答样式 */
.faq-container {
    margin-top: 2rem;
}

.faq-item {
    border-bottom: 1px solid #eee;
    padding: 1.5rem 0;
}

.faq-question {
    color: #1a237e;
    font-weight: 600;
    font-size: 1.2rem;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-question::after {
    content: "+";
    font-size: 1.5rem;
    color: #283593;
    transition: transform 0.3s;
}

.faq-item.active .faq-question::after {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-out;
    color: #444;
    line-height: 1.7;
}

.faq-item.active .faq-answer {
    max-height: 500px;
    padding-top: 1rem;
}

/* 引流按钮样式 */
.cta-section {
    text-align: center;
    padding: 2.5rem 1.5rem;
    background: linear-gradient(135deg, #1a237e 0%, #283593 100%);
    color: white;
    border-radius: 10px;
    margin: 3rem 0;
}

.cta-title {
    font-size: 1.8rem;
    margin-bottom: 1rem;
}

.cta-description {
    font-size: 1.1rem;
    max-width: 700px;
    margin: 0 auto 2rem;
    opacity: 0.9;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.cta-button {
    display: inline-block;
    padding: 0.9rem 1.8rem;
    background-color: white;
    color: #1a237e;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    transition: all 0.3s;
    border: 2px solid white;
}

.cta-button:hover {
    background-color: transparent;
    color: white;
}

.cta-button.secondary {
    background-color: transparent;
    color: white;
    border-color: rgba(255,255,255,0.5);
}

.cta-button.secondary:hover {
    background-color: white;
    color: #1a237e;
}

/* 页脚样式 */
footer {
    text-align: center;
    padding: 2rem 1rem;
    color: #666;
    border-top: 1px solid #eee;
    margin-top: 2rem;
    font-size: 0.9rem;
}

.footer-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    list-style: none;
    margin-bottom: 1rem;
}

.footer-links li {
    margin: 0.5rem 1rem;
}

.footer-links a {
    text-decoration: none;
    color: #1a237e;
}

/* 响应式设计 */
@media (max-width: 768px) {
    body {
        padding: 10px;
    }
    
    h1 {
        font-size: 1.8rem;
    }
    
    h2 {
        font-size: 1.5rem;
    }
    
    .content-section {
        padding: 1.5rem;
    }
    
    .nav-links {
        flex-direction: column;
        align-items: center;
    }
    
    .nav-links li {
        margin: 0.3rem 0;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .cta-button {
        width: 100%;
        max-width: 300px;
        text-align: center;
    }
}

/* 强调文本样式 */
.highlight {
    background-color: #e8eaf6;
    padding: 0.2rem 0.4rem;
    border-radius: 3px;
    font-weight: 600;
}

.keyword {
    color: #1a237e;
    font-weight: 700;
}

/* 列表样式 */
ul.feature-list {
    padding-left: 1.5rem;
    margin: 1rem 0;
}

ul.feature-list li {
    margin-bottom: 0.5rem;
}

/* 服务展示样式 */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.service-card {
    background-color: #f8f9fa;
    padding: 1.5rem;
    border-radius: 8px;
    border-left: 4px solid #283593;
}

.service-card h4 {
    color: #1a237e;
    margin-bottom: 0.5rem;
}