.sys-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 12px;
}
.sys-card {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
    padding: 16px;
    border-radius: 14px;
    border: 1px solid var(--border);
    background: var(--bg-card);
    color: var(--text);
    font-family: inherit;
    cursor: pointer;
    text-align: right;
    transition: border-color .15s, transform .15s;
}
.sys-card:hover {
    border-color: #38bdf8;
    transform: translateY(-2px);
}
.sys-card-icon { font-size: 1.8rem; }
.sys-card-title { font-size: 1.05rem; font-weight: 700; }
.sys-card-short { font-size: 0.82rem; color: var(--text-muted); line-height: 1.5; }
.sys-back {
    margin-bottom: 12px;
    padding: 8px 14px;
    border-radius: 10px;
    border: 1px solid var(--border);
    background: var(--bg-card);
    color: var(--text-muted);
    font-family: inherit;
    cursor: pointer;
}
.sys-back:hover { color: var(--text); }
.sys-detail-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 20px 18px;
}
.sys-detail-head {
    display: flex;
    gap: 14px;
    align-items: center;
    margin-bottom: 18px;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--border);
}
.sys-detail-icon { font-size: 2.4rem; }
.sys-detail-head h2 { margin: 0 0 4px; font-size: 1.35rem; }
.sys-sub { margin: 0; color: var(--text-muted); font-size: 0.9rem; }
.sys-block { margin-bottom: 18px; }
.sys-block h3 {
    margin: 0 0 8px;
    font-size: 1.05rem;
    color: #7dd3fc;
}
.sys-block p {
    margin: 0 0 10px;
    color: var(--text-muted);
    line-height: 1.85;
    font-size: 0.95rem;
}
.card-systems:hover { border-color: #38bdf8; }
.card-systems .card-btn { background: rgba(56,189,248,.15); color: #7dd3fc; }
.card-systems:hover .card-btn { background: #0ea5e9; color: #0f172a; }