* {
    font-family: 'Noto Sans SC', sans-serif;
}
body {
    background: linear-gradient(135deg, #f5f7fa 0%, #e8ecf1 100%);
    min-height: 100vh;
}
.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 40px 20px;
}
.content-card {
    background: white;
    border-radius: 20px;
    padding: 50px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
}
.content-card h2 {
    color: #1e3a8a;
    margin-bottom: 30px;
    font-size: 2.5rem;
    border-bottom: 4px solid #3b82f6;
    padding-bottom: 20px;
}
.content-card h3 {
    color: #2563eb;
    margin-top: 35px;
    margin-bottom: 20px;
    font-size: 1.5rem;
    font-weight: 700;
}
.content-card h4 {
    color: #3b82f6;
    margin-top: 25px;
    margin-bottom: 15px;
    font-size: 1.2rem;
    font-weight: 600;
}
.content-card p {
    line-height: 1.9;
    color: #4b5563;
    margin-bottom: 15px;
    font-size: 1rem;
}
.content-card ul {
    list-style-type: disc;
    padding-left: 30px;
    margin-bottom: 25px;
}
.content-card li {
    line-height: 1.9;
    color: #4b5563;
    margin-bottom: 10px;
}
.back-link {
    display: inline-flex;
    align-items: center;
    color: #3b82f6;
    text-decoration: none;
    margin-bottom: 30px;
    font-weight: 500;
    transition: all 0.3s;
}
.back-link:hover {
    color: #1e3a8a;
    transform: translateX(-5px);
}
.update-date {
    margin-top: 40px;
    padding-top: 25px;
    border-top: 2px solid #e5e7eb;
    color: #6b7280;
    font-size: 0.95rem;
    text-align: center;
}