/* 子页面样式 - 与官网风格保持一致 */
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #333;
    min-height: 100vh;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem;
    background-color: #ffffff;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    margin-top: 2rem;
    margin-bottom: 2rem;
    position: relative;
}

/* 返回按钮 */
.back-button {
    position: fixed;
    top: 2rem;
    left: 2rem;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    border: none;
    border-radius: 50px;
    padding: 1rem 1.5rem;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    color: #2563eb;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s ease;
    z-index: 1000;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.back-button:hover {
    background: #2563eb;
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(37, 99, 235, 0.3);
}

.back-button i {
    font-size: 1.2rem;
}

header {
    border-bottom: 2px solid #e5e7eb;
    padding-bottom: 2rem;
    margin-bottom: 3rem;
    text-align: center;
    position: relative;
}

header::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 2px;
    background: linear-gradient(135deg, #2563eb, #7c3aed);
    border-radius: 1px;
}

h1 {
    color: #1f2937;
    font-size: 2.5rem;
    font-weight: 700;
    margin: 0;
    background: linear-gradient(135deg, #2563eb, #7c3aed);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

h2 {
    color: #374151;
    font-size: 1.75rem;
    font-weight: 600;
    margin-top: 3rem;
    margin-bottom: 1.5rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid #e5e7eb;
    position: relative;
}

h2::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 50px;
    height: 2px;
    background: linear-gradient(135deg, #2563eb, #7c3aed);
    border-radius: 1px;
}

h3 {
    color: #4b5563;
    font-size: 1.25rem;
    font-weight: 600;
    margin-top: 2rem;
    margin-bottom: 1rem;
}

p {
    margin-bottom: 1.5rem;
    text-align: justify;
    color: #6b7280;
    line-height: 1.7;
}

ul, ol {
    padding-left: 1.5rem;
    margin-bottom: 1.5rem;
}

li {
    margin-bottom: 0.75rem;
    color: #6b7280;
    line-height: 1.6;
}

section {
    margin-bottom: 3rem;
    padding: 2rem;
    background: #f8fafc;
    border-radius: 15px;
    border-left: 4px solid #2563eb;
    transition: all 0.3s ease;
}

section:hover {
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transform: translateY(-2px);
}

.faq-item {
    background: white;
    border: 1px solid #e5e7eb;
    border-radius: 12px;
    padding: 2rem;
    margin-bottom: 1.5rem;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.faq-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(135deg, #2563eb, #7c3aed);
    transition: all 0.3s ease;
}

.faq-item:hover {
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    border-color: #2563eb;
    transform: translateY(-3px);
}

.faq-item:hover::before {
    width: 8px;
}

.faq-item h3 {
    color: #2563eb;
    margin-top: 0;
    margin-bottom: 1rem;
    font-weight: 600;
}

.faq-item p {
    margin-bottom: 1rem;
    color: #6b7280;
}

.faq-item ul, .faq-item ol {
    margin-bottom: 1rem;
}

.faq-item strong {
    color: #374151;
    font-weight: 600;
}

footer {
    margin-top: 4rem;
    padding-top: 2rem;
    border-top: 2px solid #e5e7eb;
    text-align: center;
    font-size: 0.9rem;
    color: #9ca3af;
}

a {
    color: #2563eb;
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: #1d4ed8;
    text-decoration: underline;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        margin: 1rem;
        padding: 1.5rem;
        border-radius: 15px;
    }
    
    .back-button {
        top: 1rem;
        left: 1rem;
        padding: 0.75rem 1rem;
        font-size: 0.9rem;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.5rem;
    }
    
    section {
        padding: 1.5rem;
        margin-bottom: 2rem;
    }
    
    .faq-item {
        padding: 1.5rem;
    }
}

@media (max-width: 480px) {
    .container {
        margin: 0.5rem;
        padding: 1rem;
    }
    
    h1 {
        font-size: 1.75rem;
    }
    
    h2 {
        font-size: 1.25rem;
    }
    
    section {
        padding: 1rem;
    }
    
    .faq-item {
        padding: 1rem;
    }
}