/* ===== AquaKem — Water Recycling & Industrial Reuse | Design System ===== */
        
        :root {
            --paper: #ffffff;
            --paper-2: #f0f7ff;
            --paper-3: #e8f4ff;
            --line: #dbe8f5;
            --line-soft: #eaf0f8;
            
            --blue: #007BFF;
            --blue-deep: #0056c7;
            --blue-bright: #3399FF;
            --blue-soft: #eef4ff;
            
            --gold: #FFC000;
            --gold-soft: #fff3cc;
            --gold-deep: #e6ac00;
            
            --text-ink: #333333;
            --text-ink-dim: #666666;
        }
        
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        
        body {
            font-family: Arial, Helvetica, sans-serif;
            background: var(--paper);
            color: var(--text-ink);
            -webkit-font-smoothing: antialiased;
            line-height: 1.6;
        }
        
        h1, h2, h3, h4 {
            font-family: Arial, Helvetica, sans-serif;
            font-weight: 700;
            letter-spacing: -0.02em;
            line-height: 1.1;
        }
        
        em { font-style: normal; color: var(--gold); }
        a { text-decoration: none; color: inherit; }
        img { max-width: 100%; display: block; }
        
        .container {
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== HERO ===== */
        .hero {
            position: relative;
            overflow: hidden;
            color: #ffffff;
            padding: 120px 0 100px;
            background: linear-gradient(135deg, var(--blue) 0%, var(--blue-deep) 60%, #003f9e 100%);
        }
        
        .hero-grid {
            display: grid;
            gap: 48px;
            align-items: center;
        }
        
        @media (min-width: 1024px) {
            .hero-grid { grid-template-columns: 1.15fr 1fr; gap: 64px; }
        }
        
        .hero-eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 14px;
            margin-bottom: 28px;
        }
        
        .eyebrow-bar {
            width: 56px;
            height: 2px;
            background: var(--gold);
        }
        
        .eyebrow-text {
            font-size: 12px;
            font-weight: 700;
            letter-spacing: 3px;
            text-transform: uppercase;
            color: var(--gold);
        }
        
        .hero h1 {
            font-size: clamp(2.4rem, 5vw, 4.25rem);
            margin-bottom: 28px;
        }
        
        .hero h1 em { color: var(--gold); }
        
        .hero p {
            max-width: 576px;
            font-size: 18px;
            line-height: 1.6;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 36px;
        }
        
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            align-items: center;
        }
        
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--gold);
            color: #ffffff;
            padding: 12px 24px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: background 0.2s;
        }
        
        .btn:hover { background: var(--gold-deep); }
        
        .btn-ghost {
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.4);
            color: #ffffff;
        }
        
        .btn-ghost:hover {
            border-color: #ffffff;
            background: rgba(255, 255, 255, 0.1);
        }
        
        .hero-img-wrap {
            position: relative;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
            border: 1px solid rgba(255, 255, 255, 0.1);
        }
        
        .hero-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            aspect-ratio: 4/3;
        }
        
        @media (min-width: 1024px) {
            .hero-img-wrap img { aspect-ratio: auto; height: 520px; }
        }
        
        .hero-badge {
            position: absolute;
            top: 16px;
            left: 16px;
            background: rgba(0, 0, 0, 0.55);
            backdrop-filter: blur(4px);
            color: #ffffff;
            font-size: 11px;
            text-transform: uppercase;
            letter-spacing: 0.2em;
            padding: 6px 12px;
            border-radius: 4px;
        }
        
        .stats {
            margin-top: 48px;
            padding-top: 32px;
            border-top: 1px solid rgba(255, 255, 255, 0.25);
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            max-width: 560px;
        }
        
        .stat .v {
            font-size: 30px;
            font-weight: 700;
            color: var(--gold);
        }
        
        .stat .l {
            font-size: 12px;
            color: rgba(255, 255, 255, 0.7);
            margin-top: 4px;
            text-transform: uppercase;
            letter-spacing: 0.15em;
        }
        
        /* ===== SECTIONS ===== */
        .section {
            padding: 96px 0;
        }
        
        .section.alt { background: var(--paper-2); }
        
        .section-head {
            text-align: center;
            max-width: 768px;
            margin: 0 auto 64px;
        }
        
        .section-head h2 {
            font-size: clamp(2rem, 3.6vw, 3rem);
            margin-bottom: 20px;
            color: var(--blue-deep);
        }
        
        .section-head p {
            color: var(--text-ink-dim);
            font-size: 18px;
            line-height: 1.6;
        }
        
        /* ===== OVERVIEW ===== */
        .overview {
            display: grid;
            gap: 48px;
        }
        
        @media (min-width: 768px) {
            .overview { grid-template-columns: 1fr 1fr; gap: 64px; }
        }
        
        .overview-text p {
            color: var(--text-ink-dim);
            line-height: 1.7;
            margin-bottom: 20px;
        }
        
        .overview-bullets {
            list-style: none;
            display: grid;
            gap: 16px;
            margin-top: 32px;
        }
        
        .overview-bullets li {
            display: flex;
            gap: 12px;
        }
        
        .overview-bullets li::before {
            content: "→";
            color: var(--gold);
            font-weight: 700;
            flex-shrink: 0;
        }
        
        .overview-bullets li {
            color: var(--text-ink-dim);
            line-height: 1.6;
        }
        
        .overview-img {
            border-radius: 12px;
            overflow: hidden;
            border: 1px solid var(--line);
            box-shadow: 0 8px 24px rgba(0, 123, 255, 0.08);
        }
        
        .overview-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            aspect-ratio: 4/3;
        }
        
        /* ===== CHALLENGES ===== */
        .challenges-grid {
            display: grid;
            gap: 24px;
            margin-top: 64px;
        }
        
        @media (min-width: 768px) {
            .challenges-grid { grid-template-columns: repeat(3, 1fr); }
        }
        
        .challenge-card {
            background: #ffffff;
            border: 1px solid var(--line);
            border-top: 3px solid var(--blue);
            border-radius: 12px;
            padding: 32px;
            transition: transform 0.3s, box-shadow 0.3s;
        }
        
        .challenge-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 20px 60px -30px rgba(0, 123, 255, 0.5);
        }
        
        .challenge-tag {
            font-size: 12px;
            font-weight: 700;
            letter-spacing: 0.2em;
            color: var(--blue);
            margin-bottom: 16px;
            text-transform: uppercase;
        }
        
        .challenge-card h3 {
            font-size: 24px;
            margin-bottom: 16px;
            color: var(--blue-deep);
        }
        
        .challenge-points {
            list-style: none;
            display: grid;
            gap: 12px;
            margin-top: 20px;
        }
        
        .challenge-points li {
            display: flex;
            gap: 8px;
            color: var(--text-ink-dim);
            font-size: 14px;
            line-height: 1.6;
        }
        
        .challenge-points li::before {
            content: "•";
            color: var(--gold);
            font-weight: 700;
            flex-shrink: 0;
        }
        
        /* ===== PROGRAMS ===== */
        .programs-head {
            display: grid;
            gap: 32px;
            margin-bottom: 64px;
        }
        
        @media (min-width: 1024px) {
            .programs-head { grid-template-columns: 2fr 1fr 1fr; align-items: end; }
        }
        
        .programs-head h2 {
            color: var(--blue-deep);
        }
        
        .programs-head p {
            color: var(--text-ink-dim);
            font-size: 16px;
            line-height: 1.6;
        }
        
        .programs-grid {
            display: grid;
            gap: 24px;
        }
        
        @media (min-width: 640px) {
            .programs-grid { grid-template-columns: repeat(2, 1fr); }
        }
        
        @media (min-width: 1024px) {
            .programs-grid { grid-template-columns: repeat(4, 1fr); }
        }
        
        .program-card {
            background: #ffffff;
            border: 1px solid var(--line);
            border-radius: 12px;
            padding: 24px;
            transition: transform 0.3s, border-color 0.3s, box-shadow 0.3s;
        }
        
        .program-card:hover {
            border-color: var(--blue);
            box-shadow: 0 8px 28px rgba(0, 123, 255, 0.12);
            transform: translateY(-3px);
        }
        
        .program-code {
            font-size: 12px;
            font-weight: 700;
            letter-spacing: 0.2em;
            color: var(--gold-deep);
            background: var(--paper-2);
            padding: 4px 10px;
            border-radius: 20px;
            display: inline-block;
            margin-bottom: 12px;
        }
        
        .program-card h3 {
            font-size: 18px;
            margin-bottom: 12px;
            color: var(--blue-deep);
        }
        
        .program-card p {
            font-size: 14px;
            color: var(--text-ink-dim);
            line-height: 1.6;
        }
        
        /* ===== TIMELINE ===== */
        .timeline-content {
            position: relative;
            border-left: 2px solid var(--line);
            margin-left: 12px;
            padding-left: 32px;
        }
        
        .timeline-step {
            position: relative;
            margin-bottom: 40px;
        }
        
        .timeline-step:last-child { margin-bottom: 0; }
        
        .timeline-marker {
            position: absolute;
            left: -40px;
            top: 0;
            width: 16px;
            height: 16px;
            border-radius: 50%;
            background: #ffffff;
            border: 2px solid var(--gold);
            box-shadow: 0 0 0 4px rgba(255, 192, 0, 0.15);
        }
        
        .timeline-number {
            font-size: 12px;
            font-weight: 700;
            letter-spacing: 0.2em;
            color: var(--gold-deep);
            margin-bottom: 8px;
            text-transform: uppercase;
        }
        
        .timeline-step h3 {
            font-size: 20px;
            margin-bottom: 12px;
            color: var(--blue-deep);
        }
        
        .timeline-step p {
            color: var(--text-ink-dim);
            line-height: 1.6;
            max-width: 600px;
        }