/* ==========================================================================
   ABOUT & SUBPAGES CSS — HTD Steel (/gioi-thieu/ and subpages)
   Conditional load: when viewing /gioi-thieu/ or its subpages
   Uses design tokens from :root in style.css
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. HERO SECTION
   -------------------------------------------------------------------------- */
.htd-about-hero {
    position: relative;
    background: linear-gradient(135deg, var(--htd-navy) 0%, var(--htd-navy-light) 45%, var(--htd-primary-dark) 100%);
    padding: 72px 0 54px;
    overflow: hidden;
    text-align: center;
    color: #ffffff;
}

.htd-about-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 1;
    pointer-events: none;
}

.htd-about-hero__inner {
    position: relative;
    z-index: 1;
    max-width: 900px;
    margin: 0 auto;
    padding: 0 var(--htd-space-6);
}

.htd-about-hero__breadcrumb {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: var(--htd-text-sm);
    color: rgba(255, 255, 255, 0.65);
    margin-bottom: var(--htd-space-4);
}

.htd-about-hero__breadcrumb a {
    color: rgba(255, 255, 255, 0.75);
    text-decoration: none;
    transition: var(--htd-transition-fast);
}

.htd-about-hero__breadcrumb a:hover {
    color: var(--htd-primary-light);
}

.htd-about-hero__breadcrumb svg {
    width: 14px;
    height: 14px;
    opacity: 0.5;
}

.htd-about-hero__badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(120, 210, 247, 0.12);
    border: 1px solid rgba(120, 210, 247, 0.3);
    color: var(--htd-primary-light);
    font-size: var(--htd-text-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    padding: 6px 14px;
    border-radius: var(--htd-radius-full);
    margin-bottom: var(--htd-space-4);
}

.htd-about-hero h1 {
    font-size: clamp(2rem, 4vw, 2.75rem);
    font-weight: 700;
    line-height: var(--htd-leading-tight);
    color: #ffffff;
    margin: 0 0 var(--htd-space-4);
    letter-spacing: -0.02em;
}

.htd-about-hero h1 span {
    color: var(--htd-primary-light);
}

.htd-about-hero__subtitle {
    font-size: var(--htd-text-lg);
    line-height: var(--htd-leading-relaxed);
    color: rgba(255, 255, 255, 0.85);
    margin: 0 auto;
    max-width: 720px;
}

/* --------------------------------------------------------------------------
   2. SUB-NAVIGATION TAB BAR
   -------------------------------------------------------------------------- */
.htd-about-nav-wrapper {
    background: var(--htd-surface);
    border-bottom: 1px solid var(--htd-border);
    position: sticky;
    top: 0;
    z-index: var(--htd-z-sticky);
    box-shadow: var(--htd-shadow-sm);
}

.htd-about-nav {
    max-width: 1320px;
    margin: 0 auto;
    padding: 0 var(--htd-space-3);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.htd-about-nav::-webkit-scrollbar {
    display: none;
}

.htd-about-nav__list {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    list-style: none;
    margin: 0;
    padding: 8px 0;
    white-space: nowrap;
}

.htd-about-nav__link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 12px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--htd-muted-fg);
    text-decoration: none;
    border-radius: var(--htd-radius-md);
    transition: var(--htd-transition-fast);
    flex-shrink: 0;
}

.htd-about-nav__link:hover {
    color: var(--htd-primary);
    background: var(--htd-primary-subtle);
}

.htd-about-nav__link.is-active {
    color: var(--htd-primary);
    background: var(--htd-primary-subtle);
    font-weight: 600;
    border-bottom: 2px solid var(--htd-primary);
}

.htd-about-nav__link svg {
    width: 15px;
    height: 15px;
    flex-shrink: 0;
}

/* --------------------------------------------------------------------------
   3. GENERAL SECTION & GRID CONTAINERS
   -------------------------------------------------------------------------- */
.htd-about-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--htd-space-12) var(--htd-space-6);
}

.htd-about-section-header {
    text-align: center;
    max-width: 760px;
    margin: 0 auto var(--htd-space-10);
}

.htd-about-section-header__tag {
    display: inline-block;
    font-size: var(--htd-text-xs);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--htd-primary);
    background: var(--htd-primary-subtle);
    padding: 4px 12px;
    border-radius: var(--htd-radius-full);
    margin-bottom: var(--htd-space-2);
}

.htd-about-section-header h2 {
    font-size: var(--htd-text-3xl);
    font-weight: 700;
    color: var(--htd-navy);
    margin: 0 0 var(--htd-space-3);
    line-height: var(--htd-leading-tight);
}

.htd-about-section-header p {
    font-size: var(--htd-text-base);
    color: var(--htd-muted-fg);
    margin: 0;
    line-height: var(--htd-leading-relaxed);
}

/* --------------------------------------------------------------------------
   4. STATS COUNTER GRID
   -------------------------------------------------------------------------- */
.htd-stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--htd-space-6);
    margin-bottom: var(--htd-space-12);
}

.htd-stat-card {
    background: var(--htd-surface);
    border: 1px solid var(--htd-border);
    border-radius: var(--htd-radius-lg);
    padding: var(--htd-space-6);
    text-align: center;
    box-shadow: var(--htd-shadow-card);
    transition: var(--htd-transition);
}

.htd-stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--htd-shadow-hover);
    border-color: var(--htd-primary-light);
}

.htd-stat-card__number {
    font-family: var(--htd-font-mono);
    font-size: var(--htd-text-4xl);
    font-weight: 700;
    color: var(--htd-primary);
    line-height: 1;
    margin-bottom: var(--htd-space-2);
}

.htd-stat-card__label {
    font-size: var(--htd-text-sm);
    font-weight: 600;
    color: var(--htd-navy);
    margin-bottom: 4px;
}

.htd-stat-card__desc {
    font-size: var(--htd-text-xs);
    color: var(--htd-muted-fg);
}

/* --------------------------------------------------------------------------
   5. CORE VALUES & FEATURE CARDS
   -------------------------------------------------------------------------- */
.htd-cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--htd-space-6);
}

.htd-feature-card {
    background: var(--htd-surface);
    border: 1px solid var(--htd-border);
    border-radius: var(--htd-radius-lg);
    padding: var(--htd-space-6);
    box-shadow: var(--htd-shadow-card);
    transition: var(--htd-transition);
    display: flex;
    flex-direction: column;
}

.htd-feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--htd-shadow-hover);
    border-color: var(--htd-primary-light);
}

.htd-feature-card__icon {
    width: 48px;
    height: 48px;
    border-radius: var(--htd-radius-md);
    background: var(--htd-primary-subtle);
    color: var(--htd-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--htd-space-4);
}

.htd-feature-card__icon svg {
    width: 24px;
    height: 24px;
}

.htd-feature-card h3 {
    font-size: var(--htd-text-xl);
    font-weight: 600;
    color: var(--htd-navy);
    margin: 0 0 var(--htd-space-2);
}

.htd-feature-card p {
    font-size: var(--htd-text-sm);
    color: var(--htd-muted-fg);
    line-height: var(--htd-leading-relaxed);
    margin: 0;
}

/* --------------------------------------------------------------------------
   6. TEAM & LEADERSHIP CARDS (EXECUTIVE PORTRAITS & BIO LISTS)
   -------------------------------------------------------------------------- */
.htd-team-group-title {
    margin-bottom: var(--htd-space-5);
    border-bottom: 2px solid var(--htd-primary-lighter);
    padding-bottom: var(--htd-space-2);
}

.htd-team-group-title h3 {
    font-size: var(--htd-text-xl);
    font-weight: 700;
    color: var(--htd-navy);
    margin: 0;
    display: flex;
    align-items: center;
    gap: var(--htd-space-2);
}

.htd-team-group-title h3 svg {
    color: var(--htd-primary);
}

.htd-team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--htd-space-6);
}

.htd-team-grid--lead {
    grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
}

.htd-team-card {
    background: var(--htd-surface);
    border: 1px solid var(--htd-border);
    border-radius: var(--htd-radius-lg);
    padding: var(--htd-space-6);
    box-shadow: var(--htd-shadow-card);
    transition: var(--htd-transition);
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}

.htd-team-card--featured {
    flex-direction: row;
    align-items: flex-start;
    gap: var(--htd-space-5);
    border-left: 4px solid var(--htd-primary);
    background: linear-gradient(180deg, #ffffff 0%, var(--htd-primary-subtle) 100%);
}

.htd-team-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--htd-shadow-hover);
    border-color: var(--htd-primary-light);
}

.htd-team-card__avatar-wrapper {
    flex-shrink: 0;
    margin-bottom: var(--htd-space-4);
}

.htd-team-card--featured .htd-team-card__avatar-wrapper {
    margin-bottom: 0;
}

.htd-team-card__avatar-img {
    width: 96px;
    height: 96px;
    object-fit: cover;
    object-position: top center;
    border-radius: var(--htd-radius-full);
    border: 3px solid #ffffff;
    box-shadow: 0 4px 14px rgba(7, 116, 187, 0.2);
    outline: 2px solid var(--htd-primary-light);
    transition: transform var(--htd-transition-fast);
}

.htd-team-card--featured .htd-team-card__avatar-img {
    width: 120px;
    height: 120px;
}

.htd-team-card:hover .htd-team-card__avatar-img {
    transform: scale(1.05);
    outline-color: var(--htd-primary);
}

.htd-team-card__content {
    flex-grow: 1;
}

.htd-team-card__role-tag {
    display: inline-block;
    font-size: var(--htd-text-xs);
    font-weight: 600;
    color: var(--htd-primary);
    background: var(--htd-primary-subtle);
    padding: 3px 12px;
    border-radius: var(--htd-radius-full);
    margin-bottom: var(--htd-space-2);
    border: 1px solid rgba(7, 116, 187, 0.15);
}

.htd-team-card h3 {
    font-size: var(--htd-text-xl);
    font-weight: 700;
    color: var(--htd-navy);
    margin: 0 0 4px;
    line-height: var(--htd-leading-tight);
}

.htd-team-card__title {
    font-size: var(--htd-text-sm);
    font-weight: 600;
    color: var(--htd-primary-dark);
    margin-bottom: var(--htd-space-3);
}

.htd-team-card__bio-list {
    list-style: none;
    margin: 0;
    padding: var(--htd-space-3) 0 0 0;
    border-top: 1px dashed var(--htd-border);
}

.htd-team-card__bio-list li {
    font-size: var(--htd-text-xs);
    color: var(--htd-secondary);
    line-height: var(--htd-leading-relaxed);
    position: relative;
    padding-left: 18px;
    margin-bottom: 8px;
}

.htd-team-card__bio-list li:last-child {
    margin-bottom: 0;
}

.htd-team-card__bio-list li::before {
    content: '•';
    position: absolute;
    left: 4px;
    top: -1px;
    color: var(--htd-primary);
    font-weight: bold;
    font-size: 14px;
}

@media (max-width: 640px) {
    .htd-team-card--featured {
        flex-direction: column;
        align-items: flex-start;
    }
    .htd-team-card--featured .htd-team-card__avatar-img {
        width: 96px;
        height: 96px;
    }
}


/* --------------------------------------------------------------------------
   7. ORGANIZATIONAL CHART & DEPARTMENTS
   -------------------------------------------------------------------------- */
.htd-org-chart {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--htd-space-6);
}

.htd-org-node {
    background: var(--htd-surface);
    border: 2px solid var(--htd-primary);
    border-radius: var(--htd-radius-lg);
    padding: var(--htd-space-5) var(--htd-space-8);
    text-align: center;
    box-shadow: var(--htd-shadow-card);
    width: 100%;
    max-width: 400px;
}

.htd-org-node--lead {
    background: linear-gradient(135deg, var(--htd-navy) 0%, var(--htd-primary-dark) 100%);
    color: #ffffff;
    border-color: var(--htd-primary-light);
}

.htd-org-node--lead h3 {
    color: #ffffff;
}

.htd-org-connector {
    width: 2px;
    height: 32px;
    background: var(--htd-primary-light);
}

.htd-org-branches {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--htd-space-4);
    width: 100%;
}

.htd-dept-card {
    background: var(--htd-surface);
    border: 1px solid var(--htd-border);
    border-radius: var(--htd-radius-lg);
    padding: var(--htd-space-5);
    box-shadow: var(--htd-shadow-card);
    transition: var(--htd-transition);
}

.htd-dept-card:hover {
    border-color: var(--htd-primary);
    transform: translateY(-2px);
}

.htd-dept-card h4 {
    font-size: var(--htd-text-base);
    font-weight: 600;
    color: var(--htd-navy);
    margin: 0 0 8px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.htd-dept-card h4 svg {
    color: var(--htd-primary);
}

.htd-dept-card p {
    font-size: var(--htd-text-xs);
    color: var(--htd-muted-fg);
    margin: 0;
    line-height: var(--htd-leading-relaxed);
}

/* --------------------------------------------------------------------------
   8. FINANCIAL CAPACITY & ROADMAP
   -------------------------------------------------------------------------- */
.htd-finance-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--htd-space-6);
}

.htd-finance-card {
    background: var(--htd-surface);
    border: 1px solid var(--htd-border);
    border-radius: var(--htd-radius-lg);
    padding: var(--htd-space-6);
    box-shadow: var(--htd-shadow-card);
}

.htd-finance-card h3 {
    font-size: var(--htd-text-lg);
    font-weight: 600;
    color: var(--htd-navy);
    margin: 0 0 var(--htd-space-3);
    display: flex;
    align-items: center;
    gap: 10px;
}

.htd-finance-card h3 svg {
    color: var(--htd-primary);
}

.htd-timeline {
    position: relative;
    padding-left: var(--htd-space-8);
}

.htd-timeline::before {
    content: '';
    position: absolute;
    left: 11px;
    top: 8px;
    bottom: 8px;
    width: 2px;
    background: var(--htd-border);
}

.htd-timeline-item {
    position: relative;
    margin-bottom: var(--htd-space-8);
}

.htd-timeline-item:last-child {
    margin-bottom: 0;
}

.htd-timeline-marker {
    position: absolute;
    left: -32px;
    top: 4px;
    width: 24px;
    height: 24px;
    border-radius: var(--htd-radius-full);
    background: var(--htd-surface);
    border: 3px solid var(--htd-primary);
    box-shadow: 0 0 0 4px var(--htd-primary-subtle);
}

.htd-timeline-item.is-active .htd-timeline-marker {
    background: var(--htd-primary);
}

.htd-timeline-content h4 {
    font-size: var(--htd-text-base);
    font-weight: 700;
    color: var(--htd-navy);
    margin: 0 0 4px;
}

.htd-timeline-content p {
    font-size: var(--htd-text-sm);
    color: var(--htd-muted-fg);
    margin: 0;
    line-height: var(--htd-leading-relaxed);
}

/* --------------------------------------------------------------------------
   9. CTA BOX
   -------------------------------------------------------------------------- */
.htd-about-cta {
    background: linear-gradient(135deg, var(--htd-navy) 0%, var(--htd-navy-light) 60%, var(--htd-primary-dark) 100%);
    border-radius: var(--htd-radius-xl);
    padding: var(--htd-space-10) var(--htd-space-8);
    text-align: center;
    color: #ffffff;
    margin-top: var(--htd-space-12);
    box-shadow: var(--htd-shadow-elevated);
}

.htd-about-cta h2 {
    font-size: var(--htd-text-2xl);
    font-weight: 700;
    color: #ffffff;
    margin: 0 0 var(--htd-space-3);
}

.htd-about-cta p {
    font-size: var(--htd-text-base);
    color: rgba(255, 255, 255, 0.8);
    max-width: 640px;
    margin: 0 auto var(--htd-space-6);
}

.htd-about-cta__buttons {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--htd-space-4);
    flex-wrap: wrap;
}

.htd-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    font-size: var(--htd-text-sm);
    font-weight: 600;
    border-radius: var(--htd-radius-md);
    text-decoration: none;
    transition: var(--htd-transition);
    cursor: pointer;
    border: none;
}

.htd-btn--primary {
    background: var(--htd-primary);
    color: #ffffff;
    box-shadow: 0 4px 14px rgba(7, 116, 187, 0.35);
}

.htd-btn--primary:hover {
    background: var(--htd-primary-dark);
    color: #ffffff;
    transform: translateY(-2px);
}

.htd-btn--outline {
    background: transparent;
    color: #ffffff;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.htd-btn--outline:hover {
    background: rgba(255, 255, 255, 0.1);
    color: #ffffff;
    border-color: #ffffff;
}

/* Overview only: an editorial layout around real project and service material. */
.htd-about-hero--overview {
    background: var(--htd-navy);
    padding: 72px 0;
    text-align: left;
}

.htd-about-hero--overview .htd-about-hero__inner {
    max-width: 1248px;
    display: grid;
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    align-items: center;
    gap: clamp(32px, 5vw, 72px);
}

.htd-about-hero--overview .htd-about-hero__breadcrumb {
    display: flex;
    width: fit-content;
}

.htd-about-hero--overview .htd-about-hero__badge {
    margin-bottom: 20px;
}

.htd-about-hero--overview h1 {
    font-size: clamp(2.25rem, 3.5vw, 3.25rem);
    max-width: 12ch;
}

.htd-about-hero--overview .htd-about-hero__subtitle {
    margin: 0;
    max-width: 54ch;
    font-size: 1.05rem;
}

.htd-about-hero__action {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    margin-top: 28px;
    padding-bottom: 6px;
    border-bottom: 1px solid var(--htd-primary-light);
    color: #ffffff;
    font-weight: 600;
    text-decoration: none;
    transition: color 250ms cubic-bezier(0.16, 1, 0.3, 1);
}

.htd-about-hero__action:hover,
.htd-about-hero__action:focus-visible {
    color: var(--htd-primary-light);
}

.htd-about-hero__visual {
    margin: 0;
    min-width: 0;
    background: var(--htd-navy-light);
    border: 1px solid rgba(255, 255, 255, 0.18);
}

.htd-about-hero__visual img {
    display: block;
    width: 100%;
    height: auto;
    aspect-ratio: 16 / 10;
    object-fit: cover;
}

.htd-about-hero__visual figcaption {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    padding: 14px 18px;
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.75rem;
}

.htd-about-hero__visual figcaption a {
    color: #ffffff;
    text-decoration: none;
}

.htd-about-hero__visual figcaption a:hover {
    color: var(--htd-primary-light);
}

/* --------------------------------------------------------------------------
   10. MAIN ABOUT HUB OVERVIEW (/gioi-thieu/)
   -------------------------------------------------------------------------- */
.htd-about-overview {
    display: flex;
    flex-direction: column;
    gap: clamp(48px, 6vw, 80px);
}

.htd-about-overview h2,
.htd-about-overview h3,
.htd-about-overview h4 {
    margin-top: 0;
    color: var(--htd-navy);
}

.htd-tag-badge {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--htd-primary);
    background: var(--htd-primary-subtle);
    padding: 4px 12px;
    border-radius: var(--htd-radius-full);
    border: 1px solid rgba(7, 116, 187, 0.15);
    margin-bottom: 12px;
}

/* Section Headings */
.htd-section-heading {
    margin-bottom: 32px;
}

.htd-section-heading h2 {
    font-size: clamp(1.75rem, 2.5vw, 2.25rem);
    font-weight: 700;
    line-height: var(--htd-leading-tight);
    margin-bottom: 8px;
}

.htd-section-heading p {
    font-size: 1rem;
    color: var(--htd-muted-fg);
    line-height: var(--htd-leading-relaxed);
    margin: 0;
    max-width: 65ch;
}

.htd-section-heading--split {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 24px;
    flex-wrap: wrap;
}

.htd-heading-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--htd-primary);
    text-decoration: none;
    transition: var(--htd-transition-fast);
    padding-bottom: 4px;
    border-bottom: 1px solid transparent;
}

.htd-heading-link:hover {
    color: var(--htd-primary-dark);
    border-bottom-color: var(--htd-primary);
}

/* 1. Intro & Credentials Strip */
.htd-overview-intro {
    padding-bottom: 40px;
    border-bottom: 1px solid var(--htd-border);
}

.htd-overview-intro__header {
    margin-bottom: 28px;
}

.htd-overview-intro__header h2 {
    font-size: clamp(2rem, 3.2vw, 2.6rem);
    line-height: var(--htd-leading-tight);
    margin-bottom: 14px;
    max-width: 22ch;
}

.htd-overview-intro__lead {
    font-size: 1.05rem;
    color: var(--htd-secondary);
    line-height: var(--htd-leading-relaxed);
    margin: 0;
    max-width: 72ch;
}

.htd-credentials-strip {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 12px;
}

.htd-credential-pill {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: var(--htd-surface);
    border: 1px solid var(--htd-border);
    padding: 12px 18px;
    border-radius: var(--htd-radius-md);
    box-shadow: var(--htd-shadow-sm);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--htd-navy);
    transition: var(--htd-transition-fast);
}

.htd-credential-pill svg {
    color: var(--htd-primary);
    flex-shrink: 0;
}

.htd-credential-pill:hover {
    border-color: var(--htd-primary-light);
    box-shadow: var(--htd-shadow-card);
    transform: translateY(-2px);
}

/* 2. 4-Stage Engineering Pipeline */
.htd-overview-pipeline {
    background: linear-gradient(180deg, var(--htd-primary-subtle) 0%, rgba(240, 249, 254, 0.4) 100%);
    border: 1px solid var(--htd-border);
    border-radius: var(--htd-radius-xl);
    padding: clamp(28px, 4vw, 48px);
}

.htd-pipeline-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 20px;
}

.htd-pipeline-card {
    background: var(--htd-surface);
    border: 1px solid var(--htd-border);
    border-radius: var(--htd-radius-lg);
    padding: 24px;
    display: flex;
    flex-direction: column;
    box-shadow: var(--htd-shadow-card);
    position: relative;
    transition: var(--htd-transition);
}

.htd-pipeline-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--htd-border);
    border-radius: var(--htd-radius-lg) var(--htd-radius-lg) 0 0;
    transition: background-color var(--htd-transition-fast);
}

.htd-pipeline-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--htd-shadow-hover);
    border-color: var(--htd-primary-light);
}

.htd-pipeline-card:hover::before {
    background: var(--htd-primary);
}

.htd-pipeline-step {
    font-family: var(--htd-font-mono);
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--htd-primary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 12px;
}

.htd-pipeline-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 8px;
    line-height: var(--htd-leading-tight);
}

.htd-pipeline-card p {
    font-size: 0.875rem;
    color: var(--htd-muted-fg);
    line-height: var(--htd-leading-relaxed);
    margin: 0;
}

/* 3. Core Services Bento Grid */
.htd-bento-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
}

.htd-bento-card {
    background: var(--htd-surface);
    border: 1px solid var(--htd-border);
    border-radius: var(--htd-radius-lg);
    padding: 28px;
    display: flex;
    flex-direction: column;
    text-decoration: none !important;
    box-shadow: var(--htd-shadow-card);
    transition: var(--htd-transition);
    position: relative;
}

.htd-bento-card--featured {
    grid-column: span 3;
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
    gap: 24px;
    align-items: center;
    background: linear-gradient(135deg, #ffffff 0%, var(--htd-primary-subtle) 100%);
    border-left: 4px solid var(--htd-primary);
}

.htd-bento-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--htd-shadow-hover);
    border-color: var(--htd-primary-light);
}

.htd-bento-card__badge {
    align-self: flex-start;
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--htd-primary-dark);
    background: var(--htd-primary-subtle);
    border: 1px solid rgba(7, 116, 187, 0.2);
    padding: 3px 10px;
    border-radius: var(--htd-radius-full);
    margin-bottom: 12px;
}

.htd-bento-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 8px;
    line-height: var(--htd-leading-tight);
}

.htd-bento-card--featured h3 {
    font-size: 1.45rem;
}

.htd-bento-card p {
    font-size: 0.9rem;
    color: var(--htd-secondary);
    line-height: var(--htd-leading-relaxed);
    margin-bottom: 16px;
    flex-grow: 1;
}

.htd-bento-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 16px;
}

.htd-bento-tags span {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--htd-navy-light);
    background: rgba(15, 23, 42, 0.04);
    border: 1px solid var(--htd-border);
    padding: 3px 10px;
    border-radius: var(--htd-radius-sm);
}

.htd-bento-cta {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--htd-primary);
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: auto;
    transition: gap var(--htd-transition-fast);
}

.htd-bento-card:hover .htd-bento-cta {
    color: var(--htd-primary-dark);
    gap: 10px;
}

/* 4. Four Principles */
.htd-principles-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 20px;
}

.htd-principle-card {
    background: var(--htd-surface);
    border: 1px solid var(--htd-border);
    border-radius: var(--htd-radius-lg);
    padding: 26px;
    box-shadow: var(--htd-shadow-card);
    transition: var(--htd-transition);
    display: flex;
    flex-direction: column;
}

.htd-principle-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--htd-shadow-hover);
    border-color: var(--htd-primary-light);
}

.htd-principle-card__icon {
    width: 44px;
    height: 44px;
    border-radius: var(--htd-radius-md);
    background: var(--htd-primary-subtle);
    color: var(--htd-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
    border: 1px solid rgba(7, 116, 187, 0.15);
}

.htd-principle-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 8px;
    line-height: var(--htd-leading-tight);
}

.htd-principle-card p {
    font-size: 0.875rem;
    color: var(--htd-muted-fg);
    line-height: var(--htd-leading-relaxed);
    margin: 0;
}

/* 5. Company Directory Hub */
.htd-directory-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
    width: 100%;
}

.htd-directory-card {
    background: var(--htd-surface);
    border: 1px solid var(--htd-border);
    border-radius: var(--htd-radius-md);
    padding: 16px 18px;
    display: flex;
    align-items: center;
    gap: 14px;
    text-decoration: none !important;
    transition: var(--htd-transition-fast);
    box-shadow: var(--htd-shadow-sm);
    min-width: 0;
}

.htd-directory-card:hover {
    transform: translateY(-2px);
    border-color: var(--htd-primary);
    box-shadow: var(--htd-shadow-hover);
    background: var(--htd-primary-subtle);
}

.htd-directory-card__icon {
    width: 36px;
    height: 36px;
    flex-shrink: 0;
    border-radius: var(--htd-radius-sm);
    background: var(--htd-primary-subtle);
    color: var(--htd-primary);
    display: flex;
    align-items: center;
    justify-content: center;
}

.htd-directory-card:hover .htd-directory-card__icon {
    background: var(--htd-primary);
    color: #ffffff;
}

.htd-directory-card__content {
    flex: 1 1 0%;
    min-width: 0;
}

.htd-directory-card h4 {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--htd-navy);
    margin: 0 0 4px;
    line-height: 1.3;
}

.htd-directory-card p {
    font-size: 0.8rem;
    color: var(--htd-muted-fg);
    margin: 0;
    line-height: 1.45;
    white-space: normal;
    word-break: break-word;
}

.htd-directory-arrow {
    color: var(--htd-primary);
    font-size: 1.1rem;
    transition: transform var(--htd-transition-fast);
    flex-shrink: 0;
}

.htd-directory-card:hover .htd-directory-arrow {
    transform: translateX(4px);
    color: var(--htd-primary-dark);
}

/* Accessibility Focus States */
.htd-bento-card:focus-visible,
.htd-directory-card:focus-visible,
.htd-heading-link:focus-visible {
    outline: 2px solid var(--htd-primary);
    outline-offset: 3px;
}

/* --------------------------------------------------------------------------
   11. RESPONSIVE BREAKPOINTS
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
    .htd-pipeline-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
    .htd-principles-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
    .htd-bento-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
    .htd-bento-card--featured {
        grid-column: span 2;
        grid-template-columns: 1fr;
    }
    .htd-directory-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 900px) {
    .htd-about-hero--overview .htd-about-hero__inner {
        grid-template-columns: 1fr;
    }

    .htd-about-hero--overview h1 {
        max-width: none;
    }

    .htd-about-hero__visual {
        max-width: 720px;
    }
}

@media (max-width: 768px) {
    .htd-about-hero {
        padding: 48px 0 36px;
    }

    .htd-about-container {
        padding: var(--htd-space-8) var(--htd-space-4);
    }

    .htd-stats-grid {
        grid-template-columns: 1fr 1fr;
    }

    .htd-cards-grid,
    .htd-team-grid,
    .htd-finance-grid {
        grid-template-columns: 1fr;
    }

    .htd-pipeline-grid,
    .htd-principles-grid,
    .htd-bento-grid,
    .htd-directory-grid {
        grid-template-columns: 1fr;
    }

    .htd-bento-card--featured {
        grid-column: span 1;
    }

    .htd-about-cta {
        padding: var(--htd-space-6) var(--htd-space-4);
    }

    .htd-about-cta__buttons {
        flex-direction: column;
        width: 100%;
    }

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

@media (max-width: 600px) {
    .htd-about-hero--overview {
        padding: 42px 0 48px;
    }

    .htd-about-hero--overview .htd-about-hero__inner {
        gap: 32px;
    }

    .htd-about-hero--overview .htd-about-hero__subtitle {
        font-size: 1rem;
    }

    .htd-about-hero__visual figcaption {
        flex-direction: column;
        gap: 4px;
    }

    .htd-section-heading--split {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }

    .htd-credentials-strip {
        grid-template-columns: 1fr;
    }
}

@media (prefers-reduced-motion: reduce) {
    .htd-about-overview a,
    .htd-about-hero--overview a,
    .htd-bento-card,
    .htd-pipeline-card,
    .htd-principle-card,
    .htd-directory-card {
        transition: none;
        transform: none !important;
    }
}