.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: #2c7da0;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.nav-pc { display: block; }
.nav-pc ul {
    display: flex;
    list-style: none;
    gap: 2rem;
}
.nav-pc a {
    text-decoration: none;
    color: #333;
    font-size: 1.05rem;
    font-weight: 500;
    padding: 0.5rem 0;
    display: block;
    transition: color 0.3s;
}
.nav-pc a:hover { color: #2c7da0; }
.breadcrumb {
    background: #fff;
    padding: 1rem 0;
    border-bottom: 1px solid #e0e0e0;
}
.breadcrumb-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}
.breadcrumb-list {
    display: flex;
    list-style: none;
    gap: 0.5rem;
    flex-wrap: wrap;
}
.breadcrumb-list li::after {
    content: '›';
    margin: 0 0.5rem;
    color: #999;
}
.breadcrumb-list li:last-child::after { content: ''; }
.breadcrumb-list a {
    color: #2c7da0;
    text-decoration: none;
}
.breadcrumb-list a:hover { text-decoration: underline; }
.breadcrumb-list .current { color: #666; }
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}
.page-header {
    background: linear-gradient(135deg, #4a90a4, #2c7da0);
    color: white;
    padding: 3rem 2rem;
    margin-bottom: 3rem;
}
.page-title {
    font-size: 2.2rem;
    text-align: center;
    margin-bottom: 1rem;
}
.page-lead {
    font-size: 1.1rem;
    text-align: center;
    opacity: 0.95;
    max-width: 800px;
    margin: 0 auto;
}

.content-section {
    background: white;
    padding: 3rem 2rem;
    margin-bottom: 2rem;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}
.section-title {
    font-size: 1.6rem;
    color: #2c7da0;
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 3px solid #4a90a4;
}
.content-section p {
    margin-bottom: 1.5rem;
    line-height: 1.9;
}
.content-section ul { margin: 1.5rem 0 1.5rem 2rem; }
.content-section li { margin-bottom: 0.8rem; }

.internal-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}
.internal-links a {
    display: block;
    background: white;
    padding: 1rem;
    text-align: center;
    border-radius: 8px;
    text-decoration: none;
    color: #2c7da0;
    font-weight: 500;
    transition: all 0.3s;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}
.internal-links a:hover {
    background: #2c7da0;
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.15);
}

@media (max-width: 768px) {
    .page-title {
        font-size: 1.8rem;
    }
    .section-title {
        font-size: 1.4rem;
    }
    .nav-pc {
        display: none;
    }
    .internal-links {
        grid-template-columns: 1fr;
    }
}