.rkgsClassSubjectHero {
    position: relative;
    overflow: hidden;
    min-height: 350px;
    padding: 16px 0 70px;
    background:
        radial-gradient(circle at 9% 62%, transparent 0 16px, rgba(24, 112, 224, .3) 17px 19px, transparent 20px),
        radial-gradient(circle at 80% 20%, transparent 0 7px, rgba(24, 112, 224, .34) 8px 10px, transparent 11px),
        linear-gradient(112deg, #062a67 0%, #07357f 52%, #05265f 100%);
    color: #fff;
}

.rkgsClassSubjectHero::after {
    content: "";
    position: absolute;
    top: 38px;
    right: -20px;
    width: 310px;
    height: 230px;
    opacity: .2;
    pointer-events: none;
    background-image: radial-gradient(rgba(71, 148, 255, .75) 1.2px, transparent 1.2px);
    background-size: 9px 9px;
    -webkit-mask-image: linear-gradient(90deg, transparent, #000 44%, #000);
    mask-image: linear-gradient(90deg, transparent, #000 44%, #000);
}

.rkgsClassSubjectHero .container {
    position: relative;
    z-index: 1;
}

.rkgsClassSubjectHero__crumbs {
    display: flex;
    align-items: center;
    gap: 9px;
    margin-bottom: 32px;
    color: rgba(255, 255, 255, .8);
    font-size: 13px;
}

.rkgsClassSubjectHero__crumbs a {
    color: inherit;
    text-decoration: none;
}

.rkgsClassSubjectHero__crumbs > i {
    color: rgba(255, 255, 255, .48);
    font-size: 10px;
}

.rkgsClassSubjectHero__content {
    text-align: center;
}

.rkgsClassSubjectHero h1 {
    margin: 0 0 10px;
    color: #fff;
    font-size: clamp(32px, 3.4vw, 48px);
    line-height: 1.08;
    letter-spacing: -.025em;
}

.rkgsClassSubjectHero h1 span {
    color: #ff8200;
}

.rkgsClassSubjectHero__content > p {
    max-width: 760px;
    margin: 0 auto;
    color: rgba(255, 255, 255, .86);
    font-size: 16px;
    line-height: 1.55;
}

.rkgsClassSubjectHero__features {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 22px;
    margin-top: 32px;
    text-align: left;
}

.rkgsClassSubjectHero__features > div {
    display: grid;
    grid-template-columns: 46px 1fr;
    column-gap: 12px;
    align-items: center;
}

.rkgsClassSubjectHero__features i {
    grid-row: 1 / 3;
    display: grid;
    place-items: center;
    width: 46px;
    height: 46px;
    border: 1px solid rgba(99, 167, 255, .7);
    border-radius: 50%;
    font-size: 20px;
}

.rkgsClassSubjectHero__features strong,
.rkgsClassSubjectHero__features span {
    display: block;
}

.rkgsClassSubjectHero__features strong {
    align-self: end;
    color: #fff;
    font-size: 14px;
}

.rkgsClassSubjectHero__features span {
    align-self: start;
    color: rgba(255, 255, 255, .72);
    font-size: 12px;
}

.rkgsClassSubjectDescriptionWrap {
    position: relative;
    z-index: 2;
    margin-top: -51px;
}

.rkgsClassSubjectDescription {
    display: flex;
    align-items: center;
    gap: 18px;
    padding: 18px 22px;
    border: 1px solid var(--rkgs-border);
    border-radius: 12px;
    background: var(--rkgs-surface);
    box-shadow: var(--rkgs-shadow-sm);
}

.rkgsClassSubjectDescription__icon {
    display: grid;
    place-items: center;
    width: 66px;
    height: 66px;
    flex: 0 0 66px;
    border-radius: 12px;
    background: var(--rkgs-surface-soft);
}

.rkgsClassSubjectDescription p {
    margin: 0;
    color: var(--rkgs-text-strong);
    font-size: 14px;
    line-height: 1.65;
    text-align: justify;
    text-justify: inter-word;
}

.rkgsClassSubjectSection {
    padding: 34px 0 38px;
}

.rkgsClassSubjectSection__head {
    display: flex;
    align-items: center;
    gap: 11px;
    margin-bottom: 18px;
}

.rkgsClassSubjectSection__head > span {
    width: 4px;
    height: 25px;
    border-radius: 999px;
    background: #ff8200;
}

.rkgsClassSubjectSection__head h2 {
    margin: 0;
    color: var(--rkgs-text-strong);
    font-size: 27px;
}

.rkgsClassSubjectChapterGrid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
}

.rkgsClassSubjectChapterCard {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    min-width: 0;
    padding: 16px 18px;
    border: 1px solid var(--rkgs-border);
    border-radius: 14px;
    background: var(--rkgs-surface);
    color: var(--rkgs-text-strong);
    text-decoration: none;
    box-shadow: var(--rkgs-shadow-sm);
    transition: transform .18s ease, border-color .18s ease, box-shadow .18s ease;
}

.rkgsClassSubjectChapterCard:hover {
    transform: translateY(-2px);
    border-color: #b9cdf4;
    box-shadow:var(--rkgs-shadow-md);
}

.rkgsClassSubjectChapterCard__number {
    display: grid;
    place-items: center;
    width: 42px;
    height: 42px;
    flex: 0 0 42px;
    border-radius: 12px;
    background: #edf3ff;
    color: #1a56db;
    font-size: 14px;
    font-weight: 800;
}

.rkgsClassSubjectChapterCard__body {
    display: flex;
    flex: 1;
    flex-direction: column;
    gap: 4px;
    min-width: 0;
}

.rkgsClassSubjectChapterCard__body strong {
    color: var(--rkgs-text-strong);
    font-size: 16px;
    line-height: 1.4;
}

.rkgsClassSubjectChapterCard__body small {
    color: var(--rkgs-text-muted);
    font-size: 12px;
}

.rkgsClassSubjectChapterCard__body p {
    margin: 0;
    color: var(--rkgs-text-muted);
    font-size: 13px;
    line-height: 1.6;
    text-align: justify;
    text-justify: inter-word;
}

.rkgsClassSubjectEmpty {
    grid-column: 1 / -1;
    padding: 24px;
    border: 1px dashed var(--rkgs-border);
    border-radius: 14px;
    color: var(--rkgs-text-muted);
    text-align: center;
}

@media (max-width: 991px) {
    .rkgsClassSubjectHero__features,
    .rkgsClassSubjectChapterGrid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

.rkgsChapterDetailGrid {
    display: grid;
    gap: 18px;
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.rkgsChapterDetailCard {
    display: block;
    min-height: 100%;
}

.rkgsChapterDetailCard--single p + p {
    margin-top: 14px;
}

.rkgsChapterDetailCard__title {
    margin-bottom: 10px;
    color: var(--rkgs-text-strong);
    font-size: 20px;
    font-weight: 800;
}

.rkgsChapterCtaSection {
    padding-top: 10px;
}

.rkgsChapterCtaCard {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    padding: 22px 24px;
    border: 1px solid var(--rkgs-border);
    border-radius: 16px;
    background: linear-gradient(135deg, #f8fbff, #eef4ff);
}

.rkgsChapterCtaCard h2 {
    margin: 0 0 8px;
    color: var(--rkgs-text-strong);
    font-size: 28px;
}

.rkgsChapterCtaCard p {
    margin: 0;
    color: var(--rkgs-text-muted);
    line-height: 1.65;
}

.rkgsChapterCtaCard__actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

@media (max-width: 991px) {
    .rkgsChapterDetailGrid {
        grid-template-columns: 1fr;
    }

    .rkgsChapterCtaCard {
        flex-direction: column;
        align-items: flex-start;
    }
}