.main-hero {
            background: linear-gradient(135deg, #0A0F1D 0%, #0F172A 60%, #1E293B 100%);
            color: var(--white);
            padding: 90px 0 110px;
            position: relative;
            overflow: hidden;
        }
        .main-hero::before {
            content: "";
            position: absolute;
            top: 0; left: 0; right: 0; bottom: 0;
            background-image: radial-gradient(rgba(212, 175, 55, 0.15) 1px, transparent 1px);
            background-size: 32px 32px;
            opacity: 0.8;
            pointer-events: none;
        }
        .main-hero::after {
            content: "";
            position: absolute;
            bottom: 0; left: 0; right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--primary-red), var(--premium-gold));
        }
        .hero-grid-split {
            display: grid;
            grid-template-columns: 1.18fr 0.82fr;
            gap: 48px;
            align-items: center;
            position: relative;
            z-index: 2;
        }
        .hero-badge-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(212, 175, 55, 0.12);
            border: 1px solid rgba(212, 175, 55, 0.35);
            color: var(--premium-gold);
            padding: 8px 18px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 1.5px;
            margin-bottom: 20px;
        }
        .hero-h1 {
            font-size: 3.35rem;
            font-weight: 900;
            line-height: 1.32;
            padding-top: 6px;
            padding-bottom: 4px;
            margin-bottom: 18px;
            color: #FFFFFF;
            background: linear-gradient(180deg, #FFFFFF 25%, #E2E8F0 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        @supports not (-webkit-background-clip: text) {
            .hero-h1 {
                color: #FFFFFF;
                -webkit-text-fill-color: #FFFFFF;
            }
        }
        .hero-slogan {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--premium-gold);
            margin-bottom: 20px;
            letter-spacing: 0.5px;
        }
        .hero-lead-text {
            font-size: 1.05rem;
            color: #94A3B8;
            line-height: 1.75;
            margin-bottom: 32px;
        }
        .hero-stats-strip {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: 12px;
            padding: 20px 16px;
            margin-bottom: 36px;
        }
        .hero-stat-item { text-align: center; }
        .hero-stat-val { font-size: 1.75rem; font-weight: 900; color: var(--premium-gold); margin-bottom: 4px; line-height: 1; }
        .hero-stat-lbl { font-size: 0.75rem; color: #CBD5E1; text-transform: uppercase; letter-spacing: 0.5px; }

        /* QUICK QUOTE CALCULATOR CARD */
        .hero-calculator-card {
            background: rgba(30, 41, 59, 0.7);
            border: 1px solid rgba(212, 175, 55, 0.35);
            border-radius: 20px;
            padding: 32px;
            box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
            backdrop-filter: blur(12px);
        }
        .calc-header { margin-bottom: 20px; text-align: center; }
        .calc-title { font-size: 1.35rem; font-weight: 800; color: var(--white); margin-bottom: 6px; }
        .calc-desc { font-size: 0.85rem; color: #94A3B8; }
        .calc-form-group { margin-bottom: 14px; text-align: left; }
        .calc-label { display: block; font-size: 0.82rem; font-weight: 700; color: #E2E8F0; margin-bottom: 6px; text-transform: uppercase; letter-spacing: 0.5px; }
        .calc-select, .calc-input {
            width: 100%;
            padding: 12px 14px;
            background: rgba(15, 23, 42, 0.8);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: 8px;
            color: var(--white);
            font-family: inherit;
            font-size: 0.92rem;
            transition: var(--transition);
        }
        .calc-select:focus, .calc-input:focus {
            outline: none;
            border-color: var(--premium-gold);
            box-shadow: 0 0 0 3px rgba(212, 175, 55, 0.2);
        }
        .calc-select option { background: #0F172A; color: var(--white); }

        /* SECTION COMMON HEADERS */
        .section-header-wrap {
            text-align: center;
            max-width: 860px;
            margin: 0 auto 56px;
        }
        .section-tagline {
            font-size: 0.85rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 2px;
            color: var(--primary-red);
            margin-bottom: 8px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .section-tagline::before {
            content: "";
            width: 24px;
            height: 2px;
            background: var(--primary-red);
        }
        .section-main-title {
            font-size: 2.35rem;
            font-weight: 900;
            color: var(--text-main);
            line-height: 1.32;
            padding-top: 4px;
            margin-bottom: 14px;
        }
        .section-main-desc {
            font-size: 1.05rem;
            color: var(--text-muted);
            line-height: 1.65;
        }

        /* 1. SOLUTIONS GRID (BY BUILDING TYPE) */
        .solutions-7-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
            gap: 28px;
        }
        .sol-card {
            background: var(--white);
            border-radius: 16px;
            overflow: hidden;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
            display: flex;
            flex-direction: column;
            transition: var(--transition);
            position: relative;
        }
        .sol-card:hover {
            transform: translateY(-8px);
            border-color: var(--primary-red);
            box-shadow: 0 20px 30px -10px rgba(0,0,0,0.12);
        }
        .sol-img-wrap {
            position: relative;
            height: 210px;
            overflow: hidden;
        }
        .sol-img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .sol-card:hover .sol-img { transform: scale(1.06); }
        .sol-badge {
            position: absolute;
            top: 14px;
            left: 14px;
            background: rgba(15, 23, 42, 0.85);
            color: var(--premium-gold);
            padding: 4px 12px;
            border-radius: 30px;
            font-size: 0.75rem;
            font-weight: 700;
            text-transform: uppercase;
            border: 1px solid rgba(212, 175, 55, 0.4);
            backdrop-filter: blur(4px);
        }
        .sol-body {
            padding: 24px;
            display: flex;
            flex-direction: column;
            flex-grow: 1;
        }
        .sol-title {
            font-size: 1.25rem;
            font-weight: 800;
            color: var(--text-main);
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .sol-desc {
            font-size: 0.92rem;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 20px;
            flex-grow: 1;
        }
        .sol-link-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-weight: 700;
            font-size: 0.9rem;
            color: var(--primary-red);
            transition: var(--transition);
        }
        .sol-link-btn:hover { color: var(--primary-red-hover); transform: translateX(4px); }

        /* 2. SERVICES SUITE (6 CORE SERVICES) */
        .services-suite-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .srv-suite-card {
            background: var(--white);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 32px 26px;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
            position: relative;
        }
        .srv-suite-card:hover {
            transform: translateY(-6px);
            border-color: var(--primary-red);
            box-shadow: var(--shadow-lg);
        }
        .srv-suite-card.highlight {
            border: 2px solid var(--primary-red);
            background: #FFFDFD;
        }
        .srv-icon-box {
            width: 56px;
            height: 56px;
            border-radius: 14px;
            background: #FEF2F2;
            color: var(--primary-red);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
        }
        .srv-suite-card:hover .srv-icon-box {
            background: var(--primary-red);
            color: var(--white);
            transition: var(--transition);
        }
        .srv-suite-num {
            position: absolute;
            top: 24px;
            right: 24px;
            font-size: 1.8rem;
            font-weight: 900;
            color: rgba(200, 16, 46, 0.15);
            line-height: 1;
        }
        .srv-suite-title {
            font-size: 1.3rem;
            font-weight: 800;
            color: var(--text-main);
            margin-bottom: 12px;
        }
        .srv-suite-desc {
            font-size: 0.92rem;
            color: var(--text-muted);
            line-height: 1.65;
            margin-bottom: 24px;
            flex-grow: 1;
        }

        /* 3. BRANDS SECTION */
        .brands-showcase-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .brand-tile {
            background: var(--white);
            border: 1px solid var(--border-color);
            border-radius: 14px;
            padding: 30px 24px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }
        .brand-tile:hover {
            border-color: var(--premium-gold);
            transform: translateY(-5px);
            box-shadow: var(--shadow-md);
        }
        .brand-tile-name {
            font-size: 1.65rem;
            font-weight: 900;
            color: var(--text-main);
            text-transform: uppercase;
            letter-spacing: 1px;
            margin-bottom: 6px;
        }
        .brand-tile-origin {
            font-size: 0.85rem;
            color: var(--premium-gold);
            font-weight: 700;
            text-transform: uppercase;
            margin-bottom: 14px;
        }
        .brand-tile-desc {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.55;
            margin: 0;
        }

        /* 4. PRODUCTS SHOWCASE */
        .products-3-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
        }
        .prod-item-card {
            background: var(--white);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .prod-item-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-lg);
            border-color: var(--primary-red);
        }
        .prod-img-box {
            height: 240px;
            position: relative;
            overflow: hidden;
        }
        .prod-img-box img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .prod-item-card:hover .prod-img-box img { transform: scale(1.08); }
        .prod-info-box {
            padding: 24px;
            display: flex;
            flex-direction: column;
            flex-grow: 1;
        }
        .prod-title {
            font-size: 1.3rem;
            font-weight: 800;
            color: var(--text-main);
            margin-bottom: 14px;
        }
        .prod-specs-table {
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
            padding: 14px 0;
            margin-bottom: 20px;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 10px;
            font-size: 0.88rem;
        }
        .prod-spec-row span { color: var(--text-muted); display: block; font-size: 0.78rem; text-transform: uppercase; }
        .prod-spec-row strong { color: var(--text-main); font-weight: 700; }

        /* 5. WHY CHOOSE VIET HUNG */
        .why-us-6-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .why-card {
            background: var(--white);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 32px 24px;
            position: relative;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }
        .why-card:hover {
            border-color: var(--premium-gold);
            transform: translateY(-5px);
            box-shadow: var(--shadow-md);
        }
        .why-num {
            font-size: 2.2rem;
            font-weight: 900;
            color: rgba(212, 175, 55, 0.25);
            line-height: 1;
            margin-bottom: 16px;
        }
        .why-title {
            font-size: 1.2rem;
            font-weight: 800;
            color: var(--text-main);
            margin-bottom: 10px;
        }
        .why-desc {
            font-size: 0.92rem;
            color: var(--text-muted);
            line-height: 1.6;
            margin: 0;
        }

        /* 6. PROJECTS GRID */
        .projects-showcase-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }
        .prj-tile {
            height: 380px;
            border-radius: 16px;
            overflow: hidden;
            position: relative;
            box-shadow: var(--shadow-md);
        }
        .prj-tile img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.6s ease;
        }
        .prj-tile:hover img { transform: scale(1.08); }
        .prj-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(15,23,42,0.92) 0%, rgba(15,23,42,0.4) 50%, transparent 100%);
            display: flex;
            flex-direction: column;
            justify-content: flex-end;
            padding: 32px;
            color: var(--white);
        }
        .prj-location {
            font-size: 0.85rem;
            color: var(--premium-gold);
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 1px;
            margin-bottom: 6px;
        }
        .prj-name {
            font-size: 1.55rem;
            font-weight: 800;
            margin-bottom: 8px;
        }
        .prj-spec {
            font-size: 0.95rem;
            color: #CBD5E1;
            margin-bottom: 14px;
        }

        /* 7. EXPERT EEAT CARD */
        .expert-banner-box {
            background: linear-gradient(135deg, #0F172A 0%, #1E293B 100%);
            border: 1px solid rgba(212, 175, 55, 0.35);
            border-radius: 20px;
            padding: 48px;
            color: var(--white);
            display: grid;
            grid-template-columns: 240px 1fr;
            gap: 40px;
            align-items: center;
        }
        .expert-photo {
            width: 220px;
            height: 220px;
            border-radius: 50%;
            object-fit: cover;
            border: 4px solid var(--premium-gold);
            box-shadow: 0 10px 30px rgba(0,0,0,0.5);
        }

        /* 8. KNOWLEDGE BLOG */
        .knowledge-3-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .know-card {
            background: var(--white);
            border-radius: 14px;
            border: 1px solid var(--border-color);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .know-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: var(--primary-red);
        }
        .know-img-wrap {
            height: 200px;
            overflow: hidden;
        }
        .know-img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .know-card:hover .know-img { transform: scale(1.06); }
        .know-body {
            padding: 24px;
            display: flex;
            flex-direction: column;
            flex-grow: 1;
        }
        .know-badge {
            background: #FEF2F2;
            color: var(--primary-red);
            font-size: 0.78rem;
            font-weight: 800;
            text-transform: uppercase;
            padding: 4px 10px;
            border-radius: 4px;
            align-self: flex-start;
            margin-bottom: 12px;
        }
        .know-title {
            font-size: 1.18rem;
            font-weight: 800;
            color: var(--text-main);
            margin-bottom: 10px;
            line-height: 1.4;
        }
        .know-desc {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.6;
            margin: 0;
            flex-grow: 1;
        }

        /* 9. FAQ ACCORDION */
        .home-faq-wrap { max-width: 900px; margin: 0 auto; }
        .faq-box-item {
            background: var(--white);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            margin-bottom: 16px;
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-box-item.active {
            border-color: var(--primary-red);
            box-shadow: var(--shadow-md);
        }
        .faq-trigger {
            padding: 22px 26px;
            font-weight: 700;
            font-size: 1.08rem;
            color: var(--text-main);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            user-select: none;
        }
        .faq-trigger:hover { color: var(--primary-red); }
        .faq-chevron { transition: transform 0.3s ease; color: var(--text-muted); }
        .faq-box-item.active .faq-chevron { transform: rotate(180deg); color: var(--primary-red); }
        .faq-content-body {
            padding: 0 26px 22px;
            font-size: 0.95rem;
            color: var(--text-muted);
            line-height: 1.7;
            display: none;
            border-top: 1px solid rgba(0,0,0,0.04);
            padding-top: 16px;
        }
        .faq-box-item.active .faq-content-body { display: block; }

        /* 10. CONSULTATION FORM */
        .consult-section-wrap {
            background: linear-gradient(135deg, #0A0F1D 0%, #0F172A 60%, #1E293B 100%);
            color: var(--white);
            padding: 96px 0;
        }
        .consult-grid-inner {
            display: grid;
            grid-template-columns: 1fr 1.15fr;
            gap: 50px;
            align-items: center;
        }
        .consult-form-box {
            background: var(--white);
            color: var(--text-main);
            border-radius: 20px;
            padding: 40px;
            box-shadow: 0 25px 50px rgba(0,0,0,0.4);
            border: 1px solid rgba(212, 175, 55, 0.3);
        }
        .c-form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
        .c-form-group { margin-bottom: 18px; }
        .c-form-label { display: block; font-size: 0.85rem; font-weight: 700; color: var(--text-main); margin-bottom: 6px; }
        .c-form-control {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            font-family: inherit;
            font-size: 0.95rem;
            background: var(--bg-light);
            transition: var(--transition);
        }
        .c-form-control:focus {
            outline: none;
            border-color: var(--primary-red);
            background: var(--white);
            box-shadow: 0 0 0 3px rgba(200, 16, 46, 0.1);
        }

        /* RESPONSIVE BREAKPOINTS */
        @media (max-width: 1024px) {
            .hero-grid-split { grid-template-columns: 1fr; }
            .solutions-7-grid { grid-template-columns: repeat(2, 1fr); }
            .services-suite-grid { grid-template-columns: repeat(2, 1fr); }
            .brands-showcase-row { grid-template-columns: repeat(2, 1fr); }
            .products-3-grid { grid-template-columns: 1fr; }
            .why-us-6-grid { grid-template-columns: repeat(2, 1fr); }
            .projects-showcase-grid { grid-template-columns: 1fr; }
            .expert-banner-box { grid-template-columns: 1fr; text-align: center; }
            .expert-photo { margin: 0 auto; }
            .knowledge-3-grid { grid-template-columns: 1fr; }
            .consult-grid-inner { grid-template-columns: 1fr; }
        }
        @media (max-width: 768px) {
            .hero-h1 { font-size: 2.25rem; line-height: 1.35; padding-top: 4px; }
            .hero-stats-strip { grid-template-columns: repeat(2, 1fr); }
            .solutions-7-grid { grid-template-columns: 1fr; }
            .services-suite-grid { grid-template-columns: 1fr; }
            .brands-showcase-row { grid-template-columns: 1fr; }
            .why-us-6-grid { grid-template-columns: 1fr; }
            .consult-form-box { padding: 24px; }
            .c-form-row { grid-template-columns: 1fr; }
        }