.hero {
    position: relative;
    padding: var(--space-3xl) 0 var(--space-2xl);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at 20% 50%, rgba(0, 255, 65, 0.06) 0%, transparent 50%),
                radial-gradient(ellipse at 80% 20%, rgba(0, 212, 255, 0.04) 0%, transparent 40%);
    pointer-events: none;
}

.hero-layout {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-lg);
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-xl);
    align-items: center;
}

@media (min-width: 900px) {
    .hero-layout {
        grid-template-columns: auto 1fr;
        gap: var(--space-2xl);
    }
}

.hero__content {
    position: relative;
    z-index: 1;
}

.hero__label {
    display: inline-block;
    color: var(--color-green);
    font-size: 0.7rem;
    font-family: var(--font-mono);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    margin-bottom: var(--space-md);
    padding: var(--space-xs) var(--space-md);
    border: 1px solid var(--color-green-dark);
    border-radius: 999px;
    background-color: rgba(0, 255, 65, 0.03);
}

.hero__label::before {
    content: '> ';
}

.hero__title {
    font-size: clamp(1.75rem, 4.5vw, 3rem);
    line-height: 1.15;
    margin-bottom: var(--space-md);
    color: var(--color-green);
}

.hero__title .accent {
    color: var(--color-blue);
}

.hero__subtitle {
    font-size: 0.95rem;
    color: var(--color-gray);
    max-width: 440px;
    margin-bottom: var(--space-xl);
    line-height: 1.7;
}

.hero__actions {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.hero__video-section {
    position: relative;
    z-index: 1;
}

.hero__video-embed {
    position: relative;
    width: 100%;
    padding-bottom: 56.25%;
    background-color: var(--color-bg-alt);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 8px 40px rgba(0, 255, 65, 0.08), 0 2px 10px rgba(0, 0, 0, 0.4);
    border: 1px solid var(--color-border-light);
}

.hero__video-embed iframe {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    border: none;
}

.hero__video-info {
    margin-top: var(--space-md);
    padding: 0 var(--space-xs);
}

.hero__video-title {
    color: var(--color-white);
    font-size: 1rem;
    margin: 0 0 var(--space-xs);
    line-height: 1.4;
}

.hero__video-title a {
    color: var(--color-white);
    transition: color var(--transition-fast);
}

.hero__video-title a:hover {
    color: var(--color-green);
}

.hero__video-meta {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    font-size: 0.75rem;
    color: var(--color-gray-dark);
}

.home-section {
    padding: var(--space-3xl) 0;
    background-color: var(--color-bg-alt);
    border-top: 1px solid var(--color-border);
}

.section-header {
    max-width: var(--max-width);
    margin: 0 auto var(--space-2xl);
    padding: 0 var(--space-lg);
}

.section-header__label {
    font-size: 0.7rem;
    font-family: var(--font-mono);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--color-green);
    margin-bottom: var(--space-xs);
    display: block;
}

.section-header__label::before {
    content: '> ';
}

.section-header__title {
    font-size: 1.5rem;
    color: var(--color-green);
    margin-bottom: var(--space-xs);
}

.section-header__subtitle {
    color: var(--color-gray);
    font-size: 0.85rem;
    max-width: 480px;
}

.home-courses {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

.home-courses .courses-grid {
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--space-xl) var(--space-lg);
}

.home-courses .course-card__thumb {
    border-radius: var(--radius-md);
}

.home-videos__cta {
    text-align: center;
    margin-top: var(--space-2xl);
}

@media (max-width: 640px) {
    .hero {
        padding: var(--space-xl) 0 var(--space-lg);
    }

    .hero-layout {
        padding: 0 var(--space-md);
    }

    .hero__title {
        font-size: 1.75rem;
    }

    .hero__subtitle {
        font-size: 0.85rem;
    }

    .hero__actions {
        flex-direction: column;
    }

    .hero__actions .btn {
        width: 100%;
        justify-content: center;
    }

    .section-header {
        text-align: left;
    }

    .section-header__subtitle {
        max-width: 100%;
    }

    .home-courses .courses-grid {
        grid-template-columns: 1fr;
    }
}

@media (min-width: 641px) and (max-width: 899px) {
    .home-courses .courses-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.book-cta {
    padding: var(--space-2xl) 0;
}

.book-cta__wrap {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

.book-cta__inner {
    display: grid;
    grid-template-columns: 180px 1fr;
    gap: var(--space-xl);
    align-items: center;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-left: 3px solid var(--color-green);
    border-radius: var(--radius-md);
    padding: var(--space-xl);
    position: relative;
    overflow: hidden;
}

.book-cta__cover {
    position: relative;
    border-radius: var(--radius-sm);
    overflow: hidden;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
    aspect-ratio: 2/3;
}

.book-cta__img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.book-cta__badge {
    position: absolute;
    top: 6px;
    left: 6px;
    font-family: var(--font-mono);
    font-size: 0.6rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    background: var(--color-green);
    color: var(--color-bg);
    padding: 2px 8px;
    border-radius: var(--radius-sm);
}

.book-cta__content {
    padding: var(--space-xs) 0;
}

.book-cta__label {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-green);
    margin-bottom: var(--space-xs);
}

.book-cta__title {
    font-family: var(--font-mono);
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: var(--space-xs);
    line-height: 1.2;
}

.book-cta__subtitle {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--color-green);
    margin-bottom: var(--space-sm);
}

.book-cta__text {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--color-gray);
    margin-bottom: var(--space-md);
    line-height: 1.6;
}

.book-cta__inner .btn {
    margin-top: var(--space-xs);
}

@media (max-width: 600px) {
    .book-cta__inner {
        grid-template-columns: 1fr;
        text-align: center;
        padding: var(--space-lg);
    }

    .book-cta__cover {
        max-width: 160px;
        margin: 0 auto;
    }
}

.news-latest {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
    text-decoration: none;
    color: inherit;
    transition: border-color var(--transition-fast), transform var(--transition-fast);
}

.news-latest:hover {
    border-color: var(--color-green-dim);
    transform: translateY(-2px);
}

.news-latest__image {
    aspect-ratio: 16/9;
    overflow: hidden;
    background: var(--color-bg-alt);
}

.news-latest__img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-normal);
}

.news-latest:hover .news-latest__img {
    transform: scale(1.05);
}

.news-latest__image--placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #0d1117 0%, #1a1f2e 100%);
    color: var(--color-green-dim);
}

.news-latest__content {
    padding: var(--space-lg);
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.news-latest__category {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-blue);
    margin-bottom: var(--space-xs);
}

.news-latest__title {
    font-family: var(--font-mono);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-white);
    line-height: 1.3;
    margin-bottom: var(--space-sm);
}

.news-latest:hover .news-latest__title {
    color: var(--color-green);
}

.news-latest__excerpt {
    font-size: 0.85rem;
    color: var(--color-gray);
    line-height: 1.6;
    margin-bottom: var(--space-sm);
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-latest__meta {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--color-gray-dark);
}

.news-latest__sep {
    color: var(--color-border);
}

.news-latest__arrow {
    margin-left: auto;
    color: var(--color-green-dim);
    transition: transform var(--transition-fast), color var(--transition-fast);
}

.news-latest:hover .news-latest__arrow {
    color: var(--color-green);
    transform: translateX(4px);
}

@media (max-width: 768px) {
    .news-latest {
        grid-template-columns: 1fr;
    }

    .news-latest__image {
        aspect-ratio: 16/9;
    }
}

.explore-grid {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-lg);
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-lg);
}

.explore-card {
    display: flex;
    flex-direction: column;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-xl) var(--space-lg);
    text-decoration: none;
    color: inherit;
    transition: border-color var(--transition-fast), transform var(--transition-fast);
}

.explore-card:hover {
    border-color: var(--color-green-dim);
    transform: translateY(-2px);
}

.explore-card__icon {
    color: var(--color-green);
    margin-bottom: var(--space-md);
}

.explore-card__title {
    font-family: var(--font-mono);
    font-size: 1.05rem;
    color: var(--color-white);
    margin-bottom: var(--space-xs);
}

.explore-card__text {
    font-size: 0.82rem;
    color: var(--color-gray);
    line-height: 1.6;
    margin-bottom: var(--space-md);
    flex-grow: 1;
}

.explore-card__arrow {
    color: var(--color-green-dim);
    transition: transform var(--transition-fast), color var(--transition-fast);
}

.explore-card:hover .explore-card__arrow {
    color: var(--color-green);
    transform: translateX(4px);
}

@media (max-width: 899px) {
    .explore-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .explore-grid {
        grid-template-columns: 1fr;
        padding: 0 var(--space-md);
    }
}

.home-editorial {
    display: grid;
    grid-template-columns: 1.6fr 1fr;
    gap: var(--space-lg);
    align-items: start;
}

.home-editorial__side {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.home-editorial__side-card {
    display: grid;
    grid-template-columns: 96px 1fr;
    gap: var(--space-md);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-sm);
    text-decoration: none;
    color: inherit;
    transition: border-color var(--transition-fast), transform var(--transition-fast);
}

.home-editorial__side-card:hover {
    border-color: var(--color-green-dim);
    transform: translateY(-2px);
}

.home-editorial__side-image {
    aspect-ratio: 1/1;
    overflow: hidden;
    border-radius: var(--radius-sm);
    background: var(--color-bg-alt);
}

.home-editorial__side-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.home-editorial__side-content {
    display: flex;
    flex-direction: column;
    justify-content: center;
    min-width: 0;
}

.home-editorial__side-title {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--color-white);
    line-height: 1.35;
    margin: var(--space-xs) 0;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.home-editorial__side-card:hover .home-editorial__side-title {
    color: var(--color-green);
}

.home-editorial__side-meta {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--color-gray-dark);
}

@media (max-width: 899px) {
    .home-editorial {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .home-editorial__side-card {
        grid-template-columns: 72px 1fr;
    }
}

.community-cta__inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-xl);
    flex-wrap: wrap;
}

.community-cta__title {
    font-family: var(--font-mono);
    font-size: 1.4rem;
    color: var(--color-white);
    margin-bottom: var(--space-xs);
}

.community-cta__text {
    color: var(--color-gray);
    font-size: 0.9rem;
    max-width: 480px;
}

@media (max-width: 640px) {
    .community-cta__inner {
        flex-direction: column;
        align-items: flex-start;
    }

    .community-cta__inner .btn {
        width: 100%;
        justify-content: center;
    }
}