.sn-container {
    max-width: 920px;
    margin: 40px auto;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    line-height: 1.65;
    color: #333;
    padding: 0 20px;
}

.sn-container h1 {
    font-size: 2.6rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: #111827;
    line-height: 1.1;
}

.sn-container .intro {
    font-size: 1.15rem;
    color: #4b5563;
    max-width: 700px;
    margin-bottom: 30px;
}

.sn-container h2 {
    font-size: 1.55rem;
    font-weight: 600;
    color: #111827;
    margin-top: 45px;
    margin-bottom: 16px;
    position: relative;
    padding-bottom: 8px;
}

.sn-container h2:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 3px;
    background: #dc2626;
    border-radius: 3px;
}

.sn-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 18px;
    margin-top: 22px;
}

.sn-card {
    background: #fff;
    border: 1px solid #e5e7eb;
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}

.sn-card h3 {
    margin: 0 0 10px;
    font-size: 1.1rem;
    color: #dc2626;
    font-weight: 600;
}

.sn-highlight {
    background: #fefce8;
    border-left: 5px solid #dc2626;
    padding: 20px;
    border-radius: 10px;
    margin: 25px 0;
}

.sn-list {
    padding-left: 22px;
}

.sn-list li {
    margin-bottom: 8px;
}

.sn-faq {
    background: #f8fafc;
    border-radius: 10px;
    padding: 16px 20px;
    margin-bottom: 12px;
}

.sn-faq strong {
    display: block;
    margin-bottom: 6px;
    color: #111827;
}

.sn-cta {
    display: inline-block;
    background: #dc2626;
    color: white;
    padding: 13px 28px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    margin-top: 10px;
    transition: background .2s;
}

.sn-cta:hover {
    background: #b91c1c;
}