/* ===== Variables ===== */
        :root {
            --primary: #2C6FBB;
            --primary-light: #4A8CD4;
            --primary-dark: #1A4A7A;
            --secondary: #F6F9FE;
            --accent: #E8833A;
            --accent-light: #F5A06A;
            --text: #1E293B;
            --text-light: #475569;
            --border: #E2E8F0;
            --shadow: 0 4px 24px rgba(44, 111, 187, 0.10);
            --shadow-hover: 0 12px 48px rgba(44, 111, 187, 0.16);
            --radius: 12px;
            --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
            --max-width: 1240px;
        }

        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        body {
            font-family: 'Inter', -apple-system, sans-serif;
            line-height: 1.6;
            color: var(--text);
            background: #ffffff;
            -webkit-font-smoothing: antialiased;
        }

        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Typography ===== */
        .section-header {
            text-align: center;
            margin-bottom: 44px;
        }

        .section-header .badge {
            display: inline-block;
            background: rgba(44, 111, 187, 0.07);
            color: var(--primary);
            font-size: 0.70rem;
            font-weight: 700;
            letter-spacing: 0.10em;
            text-transform: uppercase;
            padding: 4px 18px;
            border-radius: 30px;
            margin-bottom: 10px;
            border: 1px solid rgba(44, 111, 187, 0.08);
        }

        .section-header h2 {
            font-family: 'Inter', sans-serif;
            font-size: 2.0rem;
            font-weight: 800;
            color: var(--text);
            letter-spacing: -0.02em;
            line-height: 1.2;
        }

        .section-header h2 .highlight {
            color: var(--primary);
        }

        .section-header .sub {
            font-size: 1.0rem;
            color: var(--text-light);
            margin-top: 6px;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }

        /* ===== Hero ===== */
        .hero-section {
            padding: 60px 0 80px;
            background: linear-gradient(160deg, var(--secondary) 0%, #ffffff 100%);
            border-bottom: 1px solid rgba(44, 111, 187, 0.04);
        }

        .hero-content {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .hero-text {
            padding-right: 12px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(232, 131, 58, 0.10);
            color: var(--accent);
            font-size: 0.72rem;
            font-weight: 700;
            letter-spacing: 0.06em;
            text-transform: uppercase;
            padding: 4px 16px 4px 12px;
            border-radius: 30px;
            margin-bottom: 16px;
            border: 1px solid rgba(232, 131, 58, 0.12);
        }

        .hero-badge .dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--accent);
            display: inline-block;
            animation: pulse-dot 2s infinite;
        }

        @keyframes pulse-dot {
            0%,
            100% {
                opacity: 1;
                transform: scale(1);
            }
            50% {
                opacity: 0.4;
                transform: scale(0.8);
            }
        }

        .hero-title {
            font-family: 'Inter', sans-serif;
            font-size: 2.8rem;
            font-weight: 900;
            color: var(--text);
            letter-spacing: -0.03em;
            line-height: 1.1;
            margin-bottom: 12px;
        }

        .hero-title .highlight {
            color: var(--primary);
        }

        .hero-subtitle {
            font-size: 1.12rem;
            color: var(--text-light);
            margin-bottom: 24px;
            max-width: 520px;
            line-height: 1.7;
        }

        .hero-features {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 6px 20px;
            margin-bottom: 28px;
        }

        .hero-features li {
            list-style: none;
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.92rem;
            color: var(--text);
            padding: 4px 0;
        }

        .hero-features li .icon {
            color: var(--primary);
            font-weight: 700;
            font-size: 1.0rem;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-top: 4px;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 40px;
            background: var(--primary);
            color: #fff;
            border-radius: 40px;
            text-decoration: none;
            font-weight: 600;
            font-size: 0.95rem;
            transition: var(--transition);
            box-shadow: 0 4px 20px rgba(44, 111, 187, 0.30);
            border: none;
            cursor: pointer;
        }

        .btn-primary:hover {
            background: var(--primary-light);
            transform: translateY(-3px);
            box-shadow: 0 8px 32px rgba(44, 111, 187, 0.40);
        }

        .btn-primary .arrow {
            transition: transform 0.25s ease;
        }
        .btn-primary:hover .arrow {
            transform: translateX(4px);
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 36px;
            border: 2px solid var(--primary);
            color: var(--primary);
            border-radius: 40px;
            text-decoration: none;
            font-weight: 600;
            font-size: 0.95rem;
            transition: var(--transition);
            background: transparent;
            cursor: pointer;
        }

        .btn-outline:hover {
            background: rgba(44, 111, 187, 0.06);
            transform: translateY(-3px);
            border-color: var(--primary-light);
            color: var(--primary-light);
        }

        .btn-accent {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 40px;
            background: var(--accent);
            color: #fff;
            border-radius: 40px;
            text-decoration: none;
            font-weight: 600;
            font-size: 0.95rem;
            transition: var(--transition);
            box-shadow: 0 4px 20px rgba(232, 131, 58, 0.30);
            border: none;
            cursor: pointer;
        }

        .btn-accent:hover {
            background: var(--accent-light);
            transform: translateY(-3px);
            box-shadow: 0 8px 32px rgba(232, 131, 58, 0.40);
        }

        .hero-image {
            display: flex;
            justify-content: center;
            align-items: center;
        }

        .hero-image img {
            max-width: 100%;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            background: #fafcff;
            transition: var(--transition);
        }

        .hero-image img:hover {
            box-shadow: var(--shadow-hover);
        }

        @media (max-width: 1024px) {
            .hero-content {
                grid-template-columns: 1fr;
                text-align: center;
            }
            .hero-text {
                padding-right: 0;
            }
            .hero-title {
                font-size: 2.2rem;
            }
            .hero-subtitle {
                margin-left: auto;
                margin-right: auto;
            }
            .hero-features {
                grid-template-columns: 1fr 1fr;
                max-width: 480px;
                margin-left: auto;
                margin-right: auto;
                text-align: left;
            }
            .hero-actions {
                justify-content: center;
            }
        }

        @media (max-width: 640px) {
            .hero-title {
                font-size: 1.7rem;
            }
            .hero-features {
                grid-template-columns: 1fr;
                max-width: 300px;
            }
            .btn-primary,
            .btn-outline,
            .btn-accent {
                padding: 12px 28px;
                font-size: 0.88rem;
                width: 100%;
                justify-content: center;
            }
            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .hero-section {
                padding: 40px 0 60px;
            }
        }

        /* ===== Stats Bar ===== */
        .stats-bar {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 16px 48px;
            padding: 20px 0 8px;
            border-top: 1px solid var(--border);
            margin-top: 8px;
        }

        .stats-bar .stat-item {
            display: flex;
            align-items: baseline;
            gap: 6px;
            font-size: 0.92rem;
            color: var(--text-light);
        }

        .stats-bar .stat-item .num {
            font-family: 'Inter', sans-serif;
            font-weight: 800;
            font-size: 1.5rem;
            color: var(--primary);
            letter-spacing: -0.02em;
        }

        .stats-bar .stat-item .num.accent {
            color: var(--accent);
        }

        /* ===== Color Tech Module ===== */
        .tech-module {
            padding: 60px 0 40px;
            background: #ffffff;
        }

        .tech-comparison {
            display: grid;
            grid-template-columns: 1fr auto 1fr;
            gap: 20px;
            align-items: center;
            background: #fff;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 32px 28px;
            border: 1px solid var(--border);
            margin-bottom: 40px;
        }

        .tech-comp-card {
            text-align: center;
        }

        .tech-comp-card .label {
            font-size: 0.78rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.06em;
            color: var(--text-light);
            margin-bottom: 10px;
        }

        .tech-comp-card .label .highlight {
            color: var(--primary);
        }

        .color-bar {
            height: 28px;
            border-radius: 40px;
            overflow: hidden;
            width: 100%;
            max-width: 320px;
            margin: 0 auto 12px;
            box-shadow: inset 0 1px 4px rgba(0, 0, 0, 0.04);
        }

        .color-bar.spectra6 {
            background: linear-gradient(90deg, #1A1A1A, #F5F5F5, #E53E3E, #F6AD55, #3182CE, #38A169, #D69E2E);
            background-size: 200% 100%;
            animation: spectra-shimmer 10s ease-in-out infinite alternate;
        }

        @keyframes spectra-shimmer {
            0% {
                background-position: 0% 0%;
            }
            100% {
                background-position: 100% 0%;
            }
        }

        .color-bar.prev-gen {
            background: linear-gradient(90deg, #cbd5e1, #e2e8f0, #cbd5e1);
            opacity: 0.5;
        }

        .tech-metrics {
            display: flex;
            justify-content: center;
            gap: 14px 28px;
            flex-wrap: wrap;
            font-size: 0.85rem;
            color: var(--text-light);
        }

        .tech-metrics .num {
            font-family: 'Inter', sans-serif;
            font-weight: 800;
            font-size: 1.2rem;
            color: var(--primary-dark);
        }

        .tech-metrics .num.accent-num {
            color: var(--accent);
        }

        .vs-divider {
            font-family: 'Inter', sans-serif;
            font-weight: 800;
            font-size: 0.9rem;
            color: #CBD5E1;
            letter-spacing: 0.08em;
            user-select: none;
            padding: 0 12px;
            display: flex;
            flex-direction: column;
            align-items: center;
        }

        .vs-divider::before,
        .vs-divider::after {
            content: '';
            width: 2px;
            height: 24px;
            background: linear-gradient(to bottom, transparent, var(--border), transparent);
            display: block;
            margin: 4px auto;
        }

        .win-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--accent);
            color: #fff;
            font-size: 0.62rem;
            font-weight: 700;
            padding: 3px 18px;
            border-radius: 100px;
            margin-top: 8px;
            text-transform: uppercase;
            box-shadow: 0 4px 16px rgba(232, 131, 58, 0.25);
        }

        .tech-trio {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
            margin-top: 8px;
        }

        .tech-card {
            background: #fff;
            border-radius: var(--radius);
            padding: 28px 22px 24px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
            align-items: flex-start;
        }

        .tech-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: transparent;
        }

        .tech-card .icon-box {
            width: 56px;
            height: 56px;
            border-radius: 14px;
            background: var(--secondary);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 14px;
            font-size: 26px;
            transition: var(--transition);
            border: 1px solid rgba(44, 111, 187, 0.06);
        }

        .tech-card:hover .icon-box {
            background: var(--primary);
            border-color: var(--primary);
            transform: scale(1.04);
        }

        .tech-card .stat-badge {
            font-family: 'Inter', sans-serif;
            font-weight: 800;
            font-size: 1.6rem;
            color: var(--primary);
            line-height: 1;
            margin-bottom: 2px;
        }

        .tech-card .stat-badge .unit {
            font-size: 0.75rem;
            font-weight: 500;
            color: var(--text-light);
        }

        .tech-card h3 {
            font-family: 'Inter', sans-serif;
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--primary-dark);
            margin-bottom: 2px;
            line-height: 1.3;
        }

        .tech-card h3 .sub {
            display: block;
            font-weight: 400;
            font-size: 0.78rem;
            color: var(--text-light);
            font-family: 'Inter', sans-serif;
        }

        .tech-card p {
            color: var(--text-light);
            font-size: 0.88rem;
            line-height: 1.7;
            flex: 1;
            margin-top: 4px;
        }

        .tech-tag {
            display: inline-block;
            background: rgba(44, 111, 187, 0.06);
            color: var(--primary);
            font-size: 0.62rem;
            font-weight: 700;
            padding: 3px 16px;
            border-radius: 100px;
            margin-top: 12px;
            letter-spacing: 0.04em;
            text-transform: uppercase;
            border: 1px solid rgba(44, 111, 187, 0.06);
        }

        .tech-tag.accent-tag {
            background: rgba(232, 131, 58, 0.08);
            color: var(--accent);
            border-color: rgba(232, 131, 58, 0.10);
        }

        @media (max-width: 860px) {
            .tech-comparison {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .vs-divider {
                flex-direction: row;
                padding: 4px 0;
            }
            .vs-divider::before,
            .vs-divider::after {
                width: 36px;
                height: 2px;
                margin: 0 10px;
                background: linear-gradient(to right, transparent, var(--border), transparent);
            }
            .tech-trio {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 600px) {
            .tech-trio {
                grid-template-columns: 1fr;
            }
            .stats-bar {
                flex-direction: column;
                align-items: center;
                gap: 4px;
            }
        }

        /* ===== Specs ===== */
        .specs-section {
            padding: 60px 0;
            background: var(--secondary);
        }

        .specs-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 12px 32px;
            background: #fff;
            padding: 32px 36px;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
        }

        .spec-item {
            display: flex;
            justify-content: space-between;
            padding: 10px 0;
            border-bottom: 1px solid var(--border);
            font-size: 0.92rem;
        }

        .spec-item:last-child {
            border-bottom: none;
        }

        .spec-label {
            font-weight: 600;
            color: var(--primary-dark);
        }

        .spec-item span:last-child {
            color: var(--text);
            font-weight: 500;
            text-align: right;
        }

        @media (max-width: 640px) {
            .specs-grid {
                padding: 20px 18px;
            }
            .spec-item {
                font-size: 0.85rem;
                flex-wrap: wrap;
                gap: 4px;
            }
            .spec-item span:last-child {
                text-align: left;
                width: 100%;
            }
        }

        /* ===== Drawing ===== */
        .drawing-section {
            padding: 60px 0;
            background: #ffffff;
        }

        .drawing-section img {
            max-width: 100%;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            background: #fafcff;
            display: block;
            margin: 0 auto;
            border: 1px solid var(--border);
        }

        /* ===== Ecosystem ===== */
        .ecosystem-section {
            padding: 60px 0 80px;
            background: var(--secondary);
        }

        .eco-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
            margin-top: 8px;
        }

        .eco-card {
            background: #fff;
            border-radius: var(--radius);
            padding: 28px 20px 26px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
            align-items: center;
            text-align: center;
        }

        .eco-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: transparent;
        }

        .eco-card .eco-icon {
            width: 100px;
            height: 100px;
            background: var(--secondary);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 16px;
            transition: var(--transition);
            overflow: hidden;
            border: 1px solid rgba(44, 111, 187, 0.04);
        }

        .eco-card .eco-icon img {
            width: 100%;
            height: 100%;
            object-fit: contain;
            padding: 6px;
        }

        .eco-card:hover .eco-icon {
            background: rgba(44, 111, 187, 0.06);
            transform: scale(1.03);
        }

        .eco-card h3 {
            font-family: 'Inter', sans-serif;
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--primary-dark);
            margin-bottom: 4px;
        }

        .eco-card p {
            color: var(--text-light);
            font-size: 0.88rem;
            line-height: 1.7;
            flex: 1;
        }

        .eco-card .eco-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            margin-top: 14px;
            color: var(--primary);
            font-weight: 600;
            text-decoration: none;
            transition: var(--transition);
            font-size: 0.85rem;
        }

        .eco-card .eco-link:hover {
            color: var(--accent);
            transform: translateX(4px);
        }

        .eco-note {
            margin-top: 40px;
            text-align: center;
            padding: 20px 32px;
            background: #fff;
            border-radius: var(--radius);
            border: 1px solid var(--border);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-wrap: wrap;
            gap: 12px 24px;
            box-shadow: var(--shadow);
        }

        .eco-note p {
            color: var(--text-light);
            font-size: 0.95rem;
            margin: 0;
        }

        .eco-note p strong {
            color: var(--primary);
        }

        .eco-note .btn-sample {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 32px;
            background: var(--accent);
            color: #fff;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.85rem;
            text-decoration: none;
            transition: var(--transition);
            box-shadow: 0 4px 16px rgba(232, 131, 58, 0.25);
            border: none;
            cursor: pointer;
        }

        .eco-note .btn-sample:hover {
            background: var(--accent-light);
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(232, 131, 58, 0.35);
        }

        @media (max-width: 860px) {
            .eco-grid {
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }
        }

        @media (max-width: 600px) {
            .eco-grid {
                grid-template-columns: 1fr;
                max-width: 380px;
                margin-left: auto;
                margin-right: auto;
            }
            .eco-note {
                flex-direction: column;
                padding: 18px 20px;
            }
        }

        /* ===== Downloads ===== */
        .download-section {
            padding: 60px 0;
            background: #ffffff;
        }

        .download-grid {
            display: flex;
            flex-direction: column;
            gap: 10px;
            max-width: 840px;
            margin: 0 auto;
        }

        .download-card {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            background: #fff;
            padding: 14px 24px;
            border-radius: 8px;
            border: 1px solid var(--border);
            text-decoration: none;
            color: var(--text);
            transition: 0.2s ease;
            cursor: pointer;
        }

        .download-card:hover {
            background: var(--secondary);
            border-color: var(--primary-light);
            box-shadow: 0 2px 12px rgba(44, 111, 187, 0.06);
        }

        .download-card .file-name {
            font-weight: 500;
            color: var(--primary-dark);
            font-size: 0.95rem;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .download-card .file-name .ext {
            font-weight: 400;
            color: var(--text-light);
            font-size: 0.70rem;
            background: var(--border);
            padding: 1px 10px;
            border-radius: 12px;
        }

        .download-card .download-arrow {
            flex-shrink: 0;
            width: 34px;
            height: 34px;
            border-radius: 50%;
            background: var(--secondary);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.0rem;
            transition: 0.2s ease;
            border: 1px solid var(--border);
        }

        .download-card:hover .download-arrow {
            color: var(--accent);
            transform: translateY(2px);
            border-color: var(--accent);
        }

        @media (max-width: 640px) {
            .download-card {
                padding: 12px 16px;
                flex-wrap: wrap;
            }
            .download-card .file-name {
                font-size: 0.85rem;
                flex-wrap: wrap;
            }
            .download-card .file-name .ext {
                font-size: 0.65rem;
            }
        }

        /* ===== Applications ===== */
        .apps-section {
            padding: 60px 0;
            background: var(--secondary);
        }

        .apps-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 28px;
            margin-top: 8px;
        }

        .app-card {
            background: #fff;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
            border: 1px solid var(--border);
        }

        .app-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-hover);
        }

        .app-card .app-image {
            height: 180px;
            overflow: hidden;
            background: var(--secondary);
        }

        .app-card .app-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

        .app-card:hover .app-image img {
            transform: scale(1.04);
        }

        .app-card .app-content {
            padding: 18px 22px 22px;
            text-align: center;
        }

        .app-card .app-title {
            font-family: 'Inter', sans-serif;
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text);
            margin: 0;
        }

        .app-card .app-desc {
            font-size: 0.88rem;
            color: var(--text-light);
            margin-top: 4px;
        }

        /* ===== Recommended ===== */
        .recommended-section {
            padding: 60px 0;
            background: #ffffff;
        }

        .recommended-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 8px;
        }

        .rec-card {
            background: #fff;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
            border: 1px solid var(--border);
            text-align: center;
        }

        .rec-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-hover);
        }

        .rec-card .rec-info {
            padding: 18px 16px 22px;
        }

        .rec-card .rec-info img {
            max-width: 100%;
            height: auto;
            max-height: 110px;
            object-fit: contain;
            margin-bottom: 10px;
            background: var(--secondary);
            border-radius: 4px;
        }

        .rec-card .rec-name {
            font-family: 'Inter', sans-serif;
            font-size: 0.92rem;
            font-weight: 600;
            color: var(--primary-dark);
            margin-bottom: 10px;
            line-height: 1.3;
        }

        .rec-card .rec-link {
            display: inline-block;
            padding: 6px 24px;
            background: var(--primary);
            color: #fff;
            border-radius: 30px;
            text-decoration: none;
            font-size: 0.78rem;
            font-weight: 600;
            transition: var(--transition);
        }

        .rec-card .rec-link:hover {
            background: var(--primary-light);
        }

        @media (max-width: 1024px) {
            .recommended-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 640px) {
            .recommended-grid {
                grid-template-columns: 1fr;
                max-width: 340px;
                margin-left: auto;
                margin-right: auto;
            }
        }

        /* ===== Sustainability ===== */
        .sustainability-section {
            padding: 60px 0;
            background: var(--secondary);
        }

        .sustain-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 28px;
            margin-top: 8px;
        }

        .sustain-card {
            background: #fff;
            padding: 30px 24px;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            text-align: center;
            border: 1px solid var(--border);
            transition: var(--transition);
        }

        .sustain-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }

        .sustain-card h3 {
            font-family: 'Inter', sans-serif;
            font-size: 1.1rem;
            color: var(--primary-dark);
            margin-bottom: 8px;
        }

        .sustain-card p {
            color: var(--text-light);
            font-size: 0.92rem;
            line-height: 1.7;
        }

        /* ===== About ===== */
        .about-section {
            padding: 60px 0 70px;
            background: #ffffff;
            text-align: center;
        }

        .about-content {
            max-width: 780px;
            margin: 0 auto;
        }

        .about-content p {
            color: var(--text-light);
            font-size: 0.98rem;
            line-height: 1.8;
        }

        .about-content a {
            color: var(--primary);
            font-weight: 500;
            text-decoration: none;
        }

        .about-content a:hover {
            color: var(--primary-light);
            text-decoration: underline;
        }

        .about-content .cert-badge {
            display: inline-block;
            background: var(--secondary);
            padding: 5px 22px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.80rem;
            color: var(--text);
            border: 1px solid var(--border);
            transition: var(--transition);
            cursor: default;
        }

        .about-content .cert-badge:hover {
            border-color: var(--primary);
            background: rgba(44, 111, 187, 0.04);
        }

        .contact-btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            margin-top: 24px;
            padding: 16px 48px;
            background: var(--primary);
            color: #fff;
            border-radius: 40px;
            text-decoration: none;
            font-weight: 600;
            font-size: 0.98rem;
            transition: var(--transition);
            box-shadow: 0 4px 20px rgba(44, 111, 187, 0.25);
            border: none;
            cursor: pointer;
        }

        .contact-btn:hover {
            background: var(--primary-light);
            transform: translateY(-3px);
            box-shadow: 0 8px 32px rgba(44, 111, 187, 0.35);
        }

        /* ===== Responsive ===== */
        @media (max-width: 768px) {
            .section-header h2 {
                font-size: 1.6rem;
            }
            .container {
                padding: 0 16px;
            }
            .tech-comparison {
                padding: 24px 16px;
            }
        }

        @media (max-width: 480px) {
            .section-header h2 {
                font-size: 1.4rem;
            }
            .hero-title {
                font-size: 1.5rem;
            }
            .stats-bar .stat-item .num {
                font-size: 1.2rem;
            }
        }

        /* ===== Utility ===== */
        .text-center {
            text-align: center;
        }
        .mt-8 {
            margin-top: 8px;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .gap-8 {
            gap: 8px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .flex-wrap {
            flex-wrap: wrap;
        }