body {
            background-color: #05070A;
            color: #E2E8F0;
            font-family: 'Inter', sans-serif;
            /* Lưới không gian 3D kỹ thuật số */
            background-image: 
                linear-gradient(rgba(0, 240, 255, 0.05) 1px, transparent 1px),
                linear-gradient(90deg, rgba(0, 240, 255, 0.05) 1px, transparent 1px);
            background-size: 50px 50px;
            background-position: center -25px;
            overflow-x: hidden;
            scroll-behavior: smooth;
        }

        /* Head cover */
        .head-cover {
            position: relative;
            min-height: 100svh;
            display: grid;
            place-items: center;
            padding: clamp(4rem, 7vw, 7rem) clamp(1rem, 4vw, 4rem);
            overflow: hidden;
            isolation: isolate;
            border-bottom: 1px solid rgba(0, 240, 255, 0.28);
            background: #02070D;
        }

        .head-cover__visual {
            position: absolute;
            inset: 0;
            z-index: -4;
            width: 100%;
            height: 100%;
            object-fit: cover;
            object-position: center center;
            filter: brightness(0.72) saturate(0.92) contrast(1.06);
            transform: scale(1.012);
        }

        .head-cover::before {
            content: '';
            position: absolute;
            inset: 0;
            z-index: -3;
            pointer-events: none;
            background:
                linear-gradient(
                    180deg,
                    rgba(1, 7, 14, 0.94) 0%,
                    rgba(1, 7, 14, 0.74) 24%,
                    rgba(1, 7, 14, 0.28) 49%,
                    rgba(1, 7, 14, 0.08) 72%,
                    rgba(1, 7, 14, 0.48) 100%
                ),
                linear-gradient(
                    90deg,
                    rgba(1, 7, 14, 0.68) 0%,
                    rgba(1, 7, 14, 0.26) 48%,
                    transparent 78%
                );
        }

        .head-cover::after {
            content: '';
            position: absolute;
            inset: 0;
            z-index: -1;
            pointer-events: none;
            background:
                linear-gradient(90deg, rgba(0, 240, 255, 0.12), transparent 18%, transparent 82%, rgba(0, 240, 255, 0.08)),
                repeating-linear-gradient(0deg, rgba(255, 255, 255, 0.018) 0 1px, transparent 1px 5px);
            box-shadow:
                inset 0 0 150px rgba(0, 0, 0, 0.68),
                inset 0 -70px 90px rgba(0, 0, 0, 0.44);
        }

        .head-cover__orbit {
            position: absolute;
            width: min(58vw, 46rem);
            aspect-ratio: 1;
            right: -12vw;
            top: -18vw;
            z-index: -1;
            border: 1px solid rgba(0, 240, 255, 0.22);
            border-radius: 50%;
            opacity: 0.28;
            box-shadow:
                0 0 0 4rem rgba(0, 240, 255, 0.018),
                0 0 0 8rem rgba(0, 240, 255, 0.012);
        }

        .head-cover__orbit::before,
        .head-cover__orbit::after {
            content: '';
            position: absolute;
            inset: 18%;
            border: 1px dashed rgba(0, 240, 255, 0.26);
            border-radius: 50%;
        }

        .head-cover__orbit::after {
            inset: 38%;
            border-style: solid;
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.16);
        }

        .head-cover__inner {
            position: relative;
            z-index: 2;
            isolation: isolate;
            width: min(94vw, 92rem);
            margin: 0 auto;
            padding: clamp(1.8rem, 3vw, 2.8rem) clamp(1.5rem, 4vw, 4rem);
            text-align: center;
        }

        .head-cover__inner::before {
            content: '';
            position: absolute;
            z-index: -1;
            inset: 0;
            border-top: 1px solid rgba(0, 240, 255, 0.34);
            border-bottom: 1px solid rgba(0, 240, 255, 0.24);
            background: linear-gradient(
                90deg,
                transparent 0%,
                rgba(1, 7, 14, 0.72) 8%,
                rgba(1, 7, 14, 0.88) 24%,
                rgba(1, 7, 14, 0.9) 50%,
                rgba(1, 7, 14, 0.88) 76%,
                rgba(1, 7, 14, 0.72) 92%,
                transparent 100%
            );
            box-shadow:
                0 20px 60px rgba(0, 0, 0, 0.34),
                inset 0 0 45px rgba(0, 240, 255, 0.025);
            backdrop-filter: blur(5px);
            -webkit-backdrop-filter: blur(5px);
            clip-path: polygon(3% 0, 97% 0, 100% 50%, 97% 100%, 3% 100%, 0 50%);
        }

        .head-cover__eyebrow {
            display: flex;
            align-items: center;
            gap: 0.9rem;
            margin: 0 0 1.5rem;
            color: #00F0FF;
            font-family: 'Space Grotesk', sans-serif;
            font-size: 0.72rem;
            font-weight: 600;
            letter-spacing: 0.28em;
            text-transform: uppercase;
            animation: coverEnter 0.8s 0.08s both;
        }

        .head-cover__eyebrow::before {
            content: '';
            width: 3rem;
            height: 1px;
            background: #00F0FF;
            box-shadow: 0 0 12px rgba(0, 240, 255, 0.8);
        }

        .head-cover__title {
            max-width: none;
            margin: 0 auto;
            color: #F8FAFC;
            font-family: 'Noto Serif', Georgia, 'Times New Roman', serif;
            font-size: clamp(1.65rem, 2.8vw, 3.2rem);
            font-weight: 500;
            line-height: 1.25;
            letter-spacing: -0.025em;
            text-align: center;
            text-wrap: normal;
            text-shadow:
                0 2px 4px rgba(0, 0, 0, 0.98),
                0 0 20px rgba(0, 0, 0, 0.82);
        }

        .head-cover__title-line {
            display: block;
            animation: coverEnter 0.9s cubic-bezier(0.16, 1, 0.3, 1) both;
        }

        .head-cover__title-line:nth-child(1) { animation-delay: 0.15s; }
        .head-cover__title-line:nth-child(2) { animation-delay: 0.24s; }
        .head-cover__title-line:nth-child(3) { animation-delay: 0.33s; }
        .head-cover__title-line:nth-child(4) { animation-delay: 0.42s; }

        .head-cover__title-line--signal {
            font-weight: 500;
            letter-spacing: -0.025em;
        }

        .head-cover__title-line--impact {
            font-weight: 500;
        }

        .head-cover__title-line--cyan {
            color: #00F0FF;
            text-shadow: 0 0 26px rgba(0, 240, 255, 0.36);
        }

        .head-cover__title-accent--cyan {
            color: #00F0FF;
            font-family: 'Space Grotesk', 'Be Vietnam Pro', 'Inter', Arial, sans-serif;
            font-weight: 700;
            letter-spacing: -0.04em;
            text-shadow:
                0 0 1px rgba(0, 240, 255, 0.95),
                0 0 18px rgba(0, 240, 255, 0.32);
        }

        @media (min-width: 768px) {
            .head-cover__title-line {
                white-space: nowrap;
            }
        }

        .head-cover__meta {
            display: flex;
            flex-wrap: wrap;
            gap: 0.65rem;
            margin-top: clamp(2rem, 5vw, 3.5rem);
            animation: coverEnter 0.8s 0.55s both;
        }

        .head-cover__chip {
            padding: 0.58rem 0.8rem;
            border: 1px solid rgba(0, 240, 255, 0.28);
            background: rgba(0, 240, 255, 0.045);
            color: #94A3B8;
            font-family: 'Inter', sans-serif;
            font-size: 0.68rem;
            letter-spacing: 0.18em;
            text-transform: uppercase;
        }

        .head-cover__scroll {
            position: absolute;
            right: clamp(1.25rem, 4vw, 4rem);
            bottom: 2.5rem;
            display: flex;
            align-items: center;
            gap: 0.75rem;
            color: rgba(0, 240, 255, 0.62);
            font-size: 0.62rem;
            letter-spacing: 0.22em;
            text-transform: uppercase;
            writing-mode: vertical-rl;
        }

        .head-cover__scroll::after {
            content: '';
            width: 1px;
            height: 3rem;
            background: linear-gradient(#00F0FF, transparent);
            animation: scrollSignal 1.8s ease-in-out infinite;
        }

        @keyframes coverEnter {
            from { opacity: 0; transform: translate3d(0, 28px, 0); filter: blur(8px); }
            to { opacity: 1; transform: translate3d(0, 0, 0); filter: blur(0); }
        }

        @keyframes scrollSignal {
            0%, 100% { opacity: 0.25; transform: scaleY(0.55); transform-origin: top; }
            50% { opacity: 1; transform: scaleY(1); transform-origin: top; }
        }

        /* Scroll reveal + subtle parallax for editorial text */
        .js .scroll-reveal {
            --parallax-y: 0px;
            opacity: 0;
            transform: translate3d(0, calc(30px + var(--parallax-y)), 0);
            filter: blur(7px);
            transition:
                opacity 0.85s cubic-bezier(0.16, 1, 0.3, 1),
                transform 1s cubic-bezier(0.16, 1, 0.3, 1),
                filter 0.85s ease;
            transition-delay: var(--reveal-delay, 0ms);
            will-change: opacity, transform, filter;
        }

        .js .scroll-reveal.is-visible {
            opacity: 1;
            transform: translate3d(0, var(--parallax-y), 0);
            filter: blur(0);
        }

        /* Perspective Grid phía dưới màn hình tạo chiều sâu */
        .perspective-grid {
            position: absolute;
            bottom: 0; left: 0; width: 100%; height: 40vh;
            background-image: 
                linear-gradient(rgba(0, 240, 255, 0.1) 1px, transparent 1px),
                linear-gradient(90deg, rgba(0, 240, 255, 0.1) 1px, transparent 1px);
            background-size: 40px 40px;
            transform: perspective(500px) rotateX(70deg);
            transform-origin: bottom center;
            pointer-events: none;
            z-index: 0;
            mask-image: linear-gradient(to top, rgba(0,0,0,1), rgba(0,0,0,0));
            -webkit-mask-image: linear-gradient(to top, rgba(0,0,0,1), rgba(0,0,0,0));
        }

        /* Typography Highlights */
        .text-neon-cyan {
            color: #00F0FF;
            text-shadow: 0 0 10px rgba(0, 240, 255, 0.8), 0 0 20px rgba(0, 240, 255, 0.4);
        }
        .text-neon-orange {
            color: #FF3C00;
            text-shadow: 0 0 10px rgba(255, 60, 0, 0.8), 0 0 20px rgba(255, 60, 0, 0.4);
        }

        /* SVG Wireframe Styles */
        .wireframe-cyan {
            fill: none;
            stroke: #00F0FF;
            filter: url(#glow-cyan);
        }
        .wireframe-orange {
            fill: none;
            stroke: #FF3C00;
            filter: url(#glow-orange);
        }
        .wireframe-dim {
            fill: none;
            stroke: #004466;
            stroke-width: 1;
        }

        /* Animation cho Màn hình Frame 1 */
        .laptop-screen-text {
            opacity: 0;
            animation: bootUpSequence 3s cubic-bezier(0.1, 0.8, 0.2, 1) forwards;
            animation-delay: 1s;
        }
        @keyframes bootUpSequence {
            0% { opacity: 0; transform: scaleY(0.01); filter: blur(10px); }
            40% { opacity: 1; transform: scaleY(0.01); filter: blur(5px); }
            100% { opacity: 1; transform: scaleY(1); filter: blur(0px); }
        }

        /* Slider Before/After (Frame 3) */
        .slider-container {
            position: relative;
            width: 100%;
            height: 70vh;
            overflow: hidden;
            border: 1px solid #00F0FF;
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.2);
            background: #000;
        }
        .slider-image {
            position: absolute;
            top: 0; left: 0; width: 100%; height: 100%;
            object-fit: cover;
        }
        .slider-overlay {
            clip-path: polygon(0 0, var(--clip, 50%) 0, var(--clip, 50%) 100%, 0 100%);
            border-right: 2px solid #FF3C00; /* Đường viền cắt chéo */
        }
        .slider-handle {
            position: absolute;
            top: 0; bottom: 0; left: var(--clip, 50%);
            width: 2px;
            background-color: #FFF;
            transform: translateX(-50%);
            box-shadow: 0 0 15px #FFF, 0 0 30px #00F0FF;
            z-index: 20;
            pointer-events: none;
        }
        .slider-handle::after {
            content: '||';
            position: absolute;
            top: 50%; left: 50%; transform: translate(-50%, -50%);
            background: #05070A;
            color: #00F0FF;
            border: 1px solid #00F0FF;
            width: 30px; height: 40px;
            display: flex; align-items: center; justify-content: center;
            font-family: monospace; font-weight: bold;
            box-shadow: 0 0 10px #00F0FF;
        }
        .slider-input {
            position: absolute;
            top: 0; left: 0; width: 100%; height: 100%;
            opacity: 0; cursor: ew-resize; z-index: 30;
        }

        /* Sticky Scrollytelling Text States */
        .step-text {
            opacity: 0.1;
            transform: translateX(30px);
            transition: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
            border-left: 2px solid transparent;
        }
        .step-text.active { 
            opacity: 1; 
            transform: translateX(0);
            border-left: 2px solid #00F0FF;
            padding-left: 1.5rem;
            background: linear-gradient(90deg, rgba(0,240,255,0.1) 0%, transparent 100%);
        }

        /* Mạch điện tử (Circuit) Animation */
        .circuit-pulse {
            stroke-dasharray: 20 100;
            animation: pulse-circuit 3s linear infinite;
        }
        @keyframes pulse-circuit {
            to { stroke-dashoffset: -120; }
        }

        /* Sapo / Editorial Lead */
        .sapo-section {
            position: relative;
            padding: clamp(4rem, 8vw, 7rem) 1rem;
            overflow: hidden;
            border-bottom: 1px solid #002233;
            background:
                linear-gradient(rgba(0, 78, 104, 0.18) 1px, transparent 1px),
                linear-gradient(90deg, rgba(0, 78, 104, 0.18) 1px, transparent 1px),
                radial-gradient(circle at 14% 50%, rgba(0, 240, 255, 0.08), transparent 34%),
                linear-gradient(180deg, rgba(5, 7, 10, 0.98), rgba(2, 3, 5, 0.98));
            background-size: 72px 72px, 72px 72px, auto, auto;
        }

        .sapo-section::before {
            content: '';
            position: absolute;
            left: -10%;
            right: -10%;
            bottom: -12%;
            height: 43%;
            pointer-events: none;
            opacity: 0.52;
            background-image:
                linear-gradient(rgba(0, 240, 255, 0.18) 1px, transparent 1px),
                linear-gradient(90deg, rgba(0, 240, 255, 0.18) 1px, transparent 1px);
            background-size: 58px 34px;
            transform: perspective(320px) rotateX(56deg);
            transform-origin: center bottom;
            mask-image: linear-gradient(180deg, transparent, #000 38%);
            -webkit-mask-image: linear-gradient(180deg, transparent, #000 38%);
        }

        .sapo-laptop {
            position: relative;
            z-index: 1;
            width: min(82vw, 72rem);
            margin: 0 auto;
            filter:
                drop-shadow(0 0 12px rgba(0, 240, 255, 0.72))
                drop-shadow(0 28px 34px rgba(0, 0, 0, 0.62));
        }

        .sapo-laptop__lid {
            position: relative;
            padding: clamp(2rem, 3.5vw, 3rem) clamp(2.25rem, 4.8vw, 4rem);
            overflow: hidden;
            border: 4px solid #00F0FF;
            border-radius: 0;
            background:
                repeating-linear-gradient(0deg, rgba(0, 240, 255, 0.15) 0 1px, transparent 1px 8px),
                linear-gradient(180deg, #031218, #02070A);
            clip-path: polygon(0 0, 100% 0, 96.6% 100%, 3.4% 100%);
            box-shadow:
                0 0 10px #00F0FF,
                0 0 30px rgba(0, 240, 255, 0.55),
                inset 0 0 30px rgba(0, 240, 255, 0.16);
        }

        .sapo-laptop__camera {
            display: none;
        }

        .sapo-laptop__screen {
            position: relative;
            min-height: clamp(31rem, 48vw, 39rem);
            display: flex;
            flex-direction: column;
            justify-content: center;
            padding: clamp(2rem, 6vw, 5rem) clamp(1.6rem, 7vw, 6.5rem);
            overflow: hidden;
            border: 1px solid rgba(0, 240, 255, 0.68);
            border-radius: 0;
            background:
                linear-gradient(112deg, rgba(0, 240, 255, 0.025), transparent 42%),
                #02070B;
            box-shadow:
                0 0 26px rgba(0, 240, 255, 0.08),
                inset 0 0 55px rgba(0, 240, 255, 0.055);
        }

        .sapo-laptop__screen::before {
            content: '';
            position: absolute;
            inset: 0;
            pointer-events: none;
            background: linear-gradient(112deg, transparent 25%, rgba(255, 255, 255, 0.045) 46%, transparent 61%);
            transform: translateX(-65%);
        }

        .sapo-laptop__screen::after {
            content: '';
            position: absolute;
            inset: 0.85rem;
            pointer-events: none;
            border-top: 1px solid rgba(0, 240, 255, 0.18);
            border-bottom: 1px solid rgba(0, 240, 255, 0.18);
            clip-path: polygon(0 0, 9% 0, 9% 1px, 91% 1px, 91% 0, 100% 0, 100% 100%, 91% 100%, 91% calc(100% - 1px), 9% calc(100% - 1px), 9% 100%, 0 100%);
        }

        .sapo-laptop__base {
            position: relative;
            isolation: isolate;
            width: 124%;
            height: clamp(7rem, 13vw, 10rem);
            margin-left: -12%;
            background: #00F0FF;
            clip-path: polygon(15% 0, 85% 0, 100% 100%, 0 100%);
            filter: drop-shadow(0 0 12px rgba(0, 240, 255, 0.72));
        }

        .sapo-laptop__base::before {
            content: '';
            position: absolute;
            z-index: -2;
            inset: 4px;
            background:
                linear-gradient(180deg, rgba(0, 35, 49, 0.92), #02070A 86%);
            clip-path: polygon(14.7% 0, 85.3% 0, 100% 100%, 0 100%);
        }

        .sapo-laptop__base::after {
            content: '';
            position: absolute;
            z-index: -1;
            inset: 14% 8% 10%;
            background:
                repeating-linear-gradient(90deg, transparent 0 9.8%, rgba(0, 240, 255, 0.4) 9.8% 10%),
                repeating-linear-gradient(0deg, transparent 0 32%, rgba(0, 240, 255, 0.4) 32% 33%);
            clip-path: polygon(9% 0, 91% 0, 100% 100%, 0 100%);
        }

        .sapo-laptop__trackpad {
            position: absolute;
            z-index: 2;
            top: 55%;
            left: 50%;
            width: 21%;
            height: 32%;
            border: 2px dashed #00F0FF;
            border-radius: 0;
            background: #031015;
            clip-path: polygon(13% 0, 87% 0, 100% 100%, 0 100%);
            box-shadow: 0 0 12px rgba(0, 240, 255, 0.46);
            transform: translateX(-50%);
        }

        .sapo-laptop__edge {
            width: 34%;
            height: 0.24rem;
            margin: 0 auto;
            border-radius: 0;
            background: linear-gradient(90deg, transparent, #00F0FF 28%, #00F0FF 72%, transparent);
            box-shadow: 0 0 12px rgba(0, 240, 255, 0.75);
        }

        .sapo-label {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            margin-bottom: clamp(1.25rem, 3vw, 2rem);
            color: #00F0FF;
            font-family: 'Space Grotesk', sans-serif;
            font-size: 0.68rem;
            font-weight: 600;
            letter-spacing: 0.26em;
            text-transform: uppercase;
        }

        .sapo-label::before {
            content: '';
            width: 2.25rem;
            height: 1px;
            background: #00F0FF;
            box-shadow: 0 0 10px rgba(0, 240, 255, 0.8);
        }

        .sapo-text {
            position: relative;
            z-index: 1;
            margin: 0;
            padding-left: 1.8rem;
            color: #CBD5E1;
            font-family: 'Be Vietnam Pro', sans-serif;
            font-size: clamp(1.22rem, 2.15vw, 2rem);
            font-style: normal;
            font-weight: 500;
            line-height: 1.62;
            letter-spacing: -0.02em;
            text-wrap: pretty;
        }

        .sapo-text::before {
            content: '>';
            position: absolute;
            left: 0;
            top: 0;
            color: #00F0FF;
            font-family: 'Space Grotesk', sans-serif;
            font-style: normal;
            font-weight: 700;
            text-shadow: 0 0 12px rgba(0, 240, 255, 0.9);
        }

        .sapo-channel-count {
            margin-left: auto;
            color: rgba(148, 163, 184, 0.72);
            font-variant-numeric: tabular-nums;
        }

        .sapo-channel-stage {
            position: relative;
            min-height: clamp(13rem, 24vw, 18rem);
        }

        .sapo-channel {
            position: absolute;
            top: 50%;
            right: 0;
            left: 0;
            display: block;
            opacity: 0;
            visibility: hidden;
            transform: translate(1.5rem, -50%) skewX(-2deg);
            filter: blur(5px);
            transition:
                opacity 0.22s steps(3, end),
                transform 0.34s cubic-bezier(0.16, 1, 0.3, 1),
                filter 0.22s steps(3, end),
                visibility 0s linear 0.35s;
        }

        .sapo-channel.is-active {
            opacity: 1;
            visibility: visible;
            transform: translateY(-50%);
            filter: none;
            transition-delay: 0s;
        }

        .sapo-channel--signal,
        .sapo-channel--signal::before {
            color: #00F0FF;
            text-shadow:
                0 0 12px rgba(0, 240, 255, 0.68),
                0 0 26px rgba(0, 240, 255, 0.24);
        }

        .sapo-laptop__screen.is-tuning::before {
            z-index: 5;
            opacity: 0.92;
            background:
                repeating-linear-gradient(0deg, rgba(255, 255, 255, 0.18) 0 1px, transparent 1px 3px),
                repeating-linear-gradient(90deg, rgba(0, 240, 255, 0.2) 0 2px, rgba(255, 60, 0, 0.16) 2px 4px, transparent 4px 7px);
            mix-blend-mode: screen;
            animation: tvSignalNoise 0.36s steps(4, end);
            transform: none;
        }

        .sapo-laptop__screen.is-tuning .sapo-channel.is-active {
            animation: channelInterference 0.36s steps(3, end);
        }

        .sapo-channel-stage.is-static {
            display: grid;
            gap: 1.4rem;
            min-height: 0;
        }

        .sapo-channel-stage.is-static .sapo-channel {
            position: relative;
            top: auto;
            right: auto;
            left: auto;
            display: block;
            opacity: 1;
            visibility: visible;
            transform: none;
            filter: none;
        }

        @keyframes tvSignalNoise {
            0% { clip-path: inset(0 0 82% 0); transform: translateX(-3%); }
            24% { clip-path: inset(28% 0 45% 0); transform: translateX(4%); }
            52% { clip-path: inset(62% 0 12% 0); transform: translateX(-1%); }
            76% { clip-path: inset(12% 0 64% 0); transform: translateX(2%); }
            100% { clip-path: inset(0); transform: translateX(0); }
        }

        @keyframes channelInterference {
            0% { opacity: 1; transform: translateY(-50%); filter: none; }
            34% { opacity: 0.25; transform: translate(-1.4rem, -50%) skewX(9deg); filter: blur(2px); }
            68% { opacity: 0.75; transform: translate(1rem, -50%) skewX(-7deg); filter: contrast(1.8); }
            100% { opacity: 0; transform: translateY(-50%); filter: blur(6px); }
        }

        .sapo-signal {
            color: #00F0FF;
            text-shadow: 0 0 14px rgba(0, 240, 255, 0.7);
        }

        .sapo-laptop__status {
            position: relative;
            z-index: 1;
            display: flex;
            justify-content: space-between;
            gap: 1rem;
            margin-top: clamp(1.5rem, 3vw, 2.4rem);
            padding-top: 0.8rem;
            border-top: 1px solid rgba(0, 240, 255, 0.22);
            color: rgba(148, 163, 184, 0.7);
            font-family: 'Space Grotesk', sans-serif;
            font-size: 0.58rem;
            letter-spacing: 0.18em;
            text-transform: uppercase;
        }

        /* Chapter subtitle + long-form body */
        .chapter-story {
            position: relative;
            padding: clamp(5rem, 9vw, 8rem) 1rem;
            overflow: hidden;
            border-bottom: 1px solid rgba(0, 240, 255, 0.14);
            background:
                linear-gradient(90deg, rgba(0, 240, 255, 0.035) 1px, transparent 1px),
                linear-gradient(rgba(0, 240, 255, 0.035) 1px, transparent 1px),
                #05070A;
            background-size: 48px 48px;
        }

        .chapter-story.chapter-story--deep {
            background:
                radial-gradient(circle at 86% 12%, rgba(255, 60, 0, 0.07), transparent 25rem),
                linear-gradient(90deg, rgba(0, 240, 255, 0.028) 1px, transparent 1px),
                linear-gradient(rgba(0, 240, 255, 0.028) 1px, transparent 1px),
                #020305;
            background-size: auto, 48px 48px, 48px 48px, auto;
        }

        .chapter-shell {
            position: relative;
            z-index: 1;
            width: min(100%, 72rem);
            margin: 0 auto;
        }

        .chapter-subtitle {
            position: relative;
            display: grid;
            grid-template-columns: auto minmax(0, 1fr);
            gap: clamp(1.25rem, 4vw, 3.5rem);
            align-items: start;
            padding: clamp(1.5rem, 4vw, 3rem);
            border: 1px solid rgba(0, 240, 255, 0.22);
            border-left: 5px solid #00F0FF;
            background: linear-gradient(120deg, rgba(0, 240, 255, 0.075), rgba(5, 7, 10, 0.9) 44%);
            box-shadow: 0 20px 65px rgba(0, 0, 0, 0.36);
        }

        .chapter-subtitle::after {
            content: '';
            position: absolute;
            right: 0;
            bottom: 0;
            width: 4.5rem;
            height: 4.5rem;
            border-right: 1px solid rgba(0, 240, 255, 0.65);
            border-bottom: 1px solid rgba(0, 240, 255, 0.65);
            clip-path: polygon(48% 100%, 100% 48%, 100% 100%);
            background: rgba(0, 240, 255, 0.08);
        }

        .chapter-index {
            display: grid;
            place-items: center;
            width: clamp(3.5rem, 7vw, 5.5rem);
            aspect-ratio: 1;
            border: 1px solid rgba(0, 240, 255, 0.45);
            color: #00F0FF;
            font-family: 'Space Grotesk', sans-serif;
            font-size: clamp(1.15rem, 2.5vw, 1.8rem);
            font-weight: 700;
            letter-spacing: 0.08em;
            box-shadow: inset 0 0 20px rgba(0, 240, 255, 0.07);
        }

        .chapter-kicker {
            margin: 0 0 0.8rem;
            color: #94A3B8;
            font-family: 'Inter', sans-serif;
            font-size: 0.68rem;
            font-weight: 600;
            letter-spacing: 0.28em;
            text-transform: uppercase;
        }

        .chapter-title {
            margin: 0;
            color: #F8FAFC;
            font-family: 'Space Grotesk', sans-serif;
            font-size: clamp(2.15rem, 5vw, 4.7rem);
            font-weight: 700;
            line-height: 1.02;
            letter-spacing: -0.04em;
            text-wrap: balance;
        }

        .chapter-title .chapter-accent {
            display: block;
            margin-top: 0.16em;
            color: #00F0FF;
            text-shadow: 0 0 22px rgba(0, 240, 255, 0.34);
        }

        .chapter-title .chapter-accent--orange {
            color: #FF3C00;
            text-shadow: 0 0 22px rgba(255, 60, 0, 0.34);
        }

        .chapter-body {
            width: min(100%, 55rem);
            margin: clamp(2.25rem, 5vw, 4rem) auto 0;
            padding-left: clamp(1.2rem, 3vw, 2.25rem);
            border-left: 1px solid rgba(0, 240, 255, 0.22);
        }

        /* Editorial reading text: one serif system across the article.
           Small uppercase HUD labels keep the original technical sans-serif. */
        main .font-body:not(.uppercase):not([class*="tracking-"]) {
            font-family: 'Noto Serif', Georgia, 'Times New Roman', serif;
        }


        /* Chapter 1: cinematic full-screen */
        .chapter-story--cinematic {
            position: relative;
            min-height: 100svh;
            overflow: hidden;
            background:
                radial-gradient(circle at 75% 22%, rgba(255, 60, 0, 0.13), transparent 25rem),
                radial-gradient(circle at 18% 58%, rgba(0, 240, 255, 0.11), transparent 32rem),
                #020305;
        }

        .chapter-story--cinematic::before,
        .chapter-story--cinematic::after {
            content: '';
            position: absolute;
            pointer-events: none;
        }

        .chapter-story--cinematic::before {
            inset: 0;
            opacity: 0.32;
            background:
                linear-gradient(rgba(0, 240, 255, 0.13) 1px, transparent 1px),
                linear-gradient(90deg, rgba(0, 240, 255, 0.13) 1px, transparent 1px);
            background-size: 86px 86px;
            mask-image: linear-gradient(180deg, #000, transparent 72%);
            -webkit-mask-image: linear-gradient(180deg, #000, transparent 72%);
        }

        .chapter-story--cinematic::after {
            width: 42vw;
            aspect-ratio: 1;
            top: 5rem;
            right: -15vw;
            border: 1px solid rgba(0, 240, 255, 0.28);
            border-radius: 50%;
            box-shadow:
                0 0 0 5vw rgba(0, 240, 255, 0.025),
                0 0 0 11vw rgba(0, 240, 255, 0.018);
        }

        .chapter-story--cinematic .chapter-shell {
            position: relative;
            z-index: 1;
            width: min(100%, 92rem);
        }

        .chapter-story--cinematic .chapter-subtitle {
            position: relative;
            min-height: 72svh;
            align-items: center;
            grid-template-columns: minmax(7rem, 0.24fr) minmax(0, 1fr);
            padding: clamp(3rem, 8vw, 7rem);
            overflow: hidden;
            border: 1px solid rgba(0, 240, 255, 0.32);
            border-left: 7px solid #00F0FF;
            background:
                linear-gradient(115deg, rgba(0, 240, 255, 0.08), transparent 42%),
                rgba(2, 6, 9, 0.78);
            box-shadow:
                0 0 50px rgba(0, 240, 255, 0.08),
                inset 0 0 80px rgba(0, 240, 255, 0.035);
        }

        .chapter-story--cinematic .chapter-subtitle::after {
            content: 'ASSUMPTION_BREAK // 01';
            position: absolute;
            right: 1.8rem;
            bottom: 1.4rem;
            color: rgba(0, 240, 255, 0.64);
            font-family: 'Space Grotesk', sans-serif;
            font-size: 0.64rem;
            letter-spacing: 0.28em;
        }

        .chapter-story--cinematic .chapter-index {
            width: auto;
            color: transparent;
            font-size: clamp(8rem, 20vw, 19rem);
            line-height: 0.72;
            -webkit-text-stroke: 1px rgba(0, 240, 255, 0.6);
            text-shadow: 0 0 34px rgba(0, 240, 255, 0.16);
        }

        .chapter-story--cinematic .chapter-kicker {
            margin-bottom: 1.2rem;
            color: #FF6B3D;
        }

        .chapter-story--cinematic .chapter-title {
            max-width: 15ch;
            font-size: clamp(3.2rem, 7.8vw, 8.4rem);
            line-height: 0.91;
            letter-spacing: -0.055em;
        }

        .chapter-story--cinematic .chapter-title .chapter-accent {
            color: #FF6B3D;
            text-shadow: 0 0 24px rgba(255, 60, 0, 0.34);
        }

        .chapter-story--cinematic .chapter-body {
            position: relative;
            z-index: 2;
            width: min(100%, 58rem);
            margin-top: clamp(4rem, 8vw, 7rem);
        }

        /* Reusable cinematic subtitle for Chapters 2–5 */
        .chapter-subtitle--cinematic {
            position: relative;
            width: min(100%, 92rem);
            min-height: 72svh;
            align-items: center;
            grid-template-columns: minmax(7rem, 0.24fr) minmax(0, 1fr);
            padding: clamp(3rem, 8vw, 7rem);
            overflow: hidden;
            border: 1px solid rgba(0, 240, 255, 0.32);
            border-left: 7px solid #00F0FF;
            background:
                linear-gradient(rgba(0, 240, 255, 0.07) 1px, transparent 1px),
                linear-gradient(90deg, rgba(0, 240, 255, 0.07) 1px, transparent 1px),
                linear-gradient(115deg, rgba(0, 240, 255, 0.1), transparent 42%),
                rgba(2, 6, 9, 0.86);
            background-size: 72px 72px, 72px 72px, auto, auto;
            box-shadow:
                0 0 50px rgba(0, 240, 255, 0.08),
                inset 0 0 80px rgba(0, 240, 255, 0.035);
        }

        .chapter-subtitle--cinematic > * {
            position: relative;
            z-index: 1;
        }

        .chapter-subtitle--cinematic::before {
            content: '';
            position: absolute;
            z-index: 0;
            width: min(46vw, 42rem);
            aspect-ratio: 1;
            top: 50%;
            right: -12%;
            border: 1px solid rgba(0, 240, 255, 0.23);
            border-radius: 50%;
            box-shadow:
                0 0 0 5vw rgba(0, 240, 255, 0.025),
                0 0 0 10vw rgba(0, 240, 255, 0.016);
            transform: translateY(-50%);
        }

        .chapter-subtitle--cinematic::after {
            content: attr(data-cinema-label);
            right: 1.8rem;
            bottom: 1.4rem;
            width: auto;
            height: auto;
            border: 0;
            clip-path: none;
            background: none;
            color: rgba(0, 240, 255, 0.64);
            font-family: 'Space Grotesk', sans-serif;
            font-size: 0.64rem;
            letter-spacing: 0.28em;
        }

        .chapter-subtitle--cinematic .chapter-index {
            width: auto;
            aspect-ratio: auto;
            border: 0;
            color: transparent;
            font-size: clamp(8rem, 20vw, 19rem);
            line-height: 0.72;
            -webkit-text-stroke: 1px rgba(0, 240, 255, 0.6);
            text-shadow: 0 0 34px rgba(0, 240, 255, 0.16);
            box-shadow: none;
        }

        .chapter-subtitle--cinematic .chapter-kicker {
            margin-bottom: 1.2rem;
            color: #FF6B3D;
        }

        .chapter-subtitle--cinematic .chapter-title {
            max-width: 15ch;
            font-size: clamp(3.2rem, 7.8vw, 8.4rem);
            line-height: 0.91;
            letter-spacing: -0.055em;
        }

        .chapter-subtitle--cinematic .chapter-title .chapter-accent {
            text-shadow: 0 0 24px rgba(0, 240, 255, 0.34);
        }

        .chapter-subtitle--cinematic .chapter-title .chapter-accent--orange {
            text-shadow: 0 0 24px rgba(255, 60, 0, 0.38);
        }

        /* Chapter 1 price shock shelf */
        .product-shock-column {
            position: relative;
            min-height: 38rem;
            display: flex;
            flex-direction: column;
            justify-content: center;
            padding: 1rem;
        }

        .product-shock-hud {
            display: flex;
            justify-content: space-between;
            gap: 1rem;
            margin-bottom: 0.9rem;
            color: rgba(148, 163, 184, 0.78);
            font-family: 'Space Grotesk', sans-serif;
            font-size: 0.64rem;
            letter-spacing: 0.18em;
            text-transform: uppercase;
        }

        .product-shock-level {
            color: #FF6B3D;
            font-variant-numeric: tabular-nums;
        }

        .product-shelf {
            --shock-progress: 0;
            position: relative;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            min-height: 31rem;
            padding: 2rem 1.25rem 1.25rem;
            overflow: hidden;
            border: 1px solid rgba(0, 240, 255, 0.36);
            background:
                linear-gradient(rgba(0, 240, 255, 0.08) 1px, transparent 1px),
                linear-gradient(90deg, rgba(0, 240, 255, 0.08) 1px, transparent 1px),
                radial-gradient(circle at 50% 92%, rgba(255, 60, 0, 0.12), transparent 48%),
                #03070A;
            background-size: 38px 38px, 38px 38px, auto, auto;
            box-shadow: inset 0 0 56px rgba(0, 0, 0, 0.68);
        }

        .product-shelf::before,
        .product-shelf::after {
            content: '';
            position: absolute;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, transparent, #00F0FF 8%, #00F0FF 92%, transparent);
            box-shadow: 0 0 12px rgba(0, 240, 255, 0.72);
        }

        .product-shelf::before {
            top: 43%;
        }

        .product-shelf::after {
            top: auto;
            bottom: 28%;
        }

        .product-shelf__scan {
            position: absolute;
            z-index: 3;
            inset: 0;
            pointer-events: none;
            background: linear-gradient(180deg, transparent 0, rgba(0, 240, 255, 0.22) 50%, transparent 100%);
            height: 18%;
            transform: translateY(-110%);
            animation: shelfScan 4.2s linear infinite;
            mix-blend-mode: screen;
        }

        .product-icons {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: repeat(3, minmax(0, 1fr));
            gap: 0.75rem;
            align-items: stretch;
        }

        .product-slot {
            position: relative;
            z-index: 2;
            align-self: stretch;
            min-width: 0;
            margin: 0;
            padding: 1rem 0.7rem;
            border: 1px solid rgba(0, 240, 255, 0.28);
            background: rgba(2, 8, 12, 0.9);
            opacity: 0.18;
            transform: translateY(6rem) scale(0.9) rotateX(7deg);
            transform-origin: center bottom;
            filter: grayscale(1) blur(2px);
            will-change: transform, opacity, filter;
            transition:
                transform 0.85s cubic-bezier(0.16, 1, 0.3, 1),
                opacity 0.65s ease,
                filter 0.65s ease,
                border-color 0.55s ease,
                box-shadow 0.55s ease;
        }

        .product-slot.is-shocked {
            opacity: 1;
            transform: translateY(0) scale(1);
            filter: none;
            border-color: #FF3C00;
            box-shadow:
                0 0 24px rgba(255, 60, 0, 0.26),
                inset 0 0 24px rgba(255, 60, 0, 0.07);
        }

        .product-slot__icon {
            height: 6.5rem;
            display: grid;
            place-items: center;
            color: #00F0FF;
        }

        .product-slot__icon svg {
            width: min(100%, 7rem);
            height: 100%;
            fill: none;
            stroke: currentColor;
            stroke-width: 2;
            filter: drop-shadow(0 0 8px rgba(0, 240, 255, 0.6));
        }

        .product-slot.is-shocked .product-slot__icon {
            color: #FF6B3D;
        }

        .product-slot__copy {
            display: flex;
            flex-direction: column;
            gap: 0.32rem;
            padding-top: 0.8rem;
            border-top: 1px solid rgba(0, 240, 255, 0.22);
            text-align: center;
        }

        .product-slot__name {
            color: #CBD5E1;
            font-family: 'Space Grotesk', sans-serif;
            font-size: 0.68rem;
            letter-spacing: 0.2em;
            text-transform: uppercase;
        }

        .product-price-meter {
            position: relative;
            z-index: 2;
            min-height: 9rem;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: clamp(1rem, 4vw, 2.4rem);
            margin-top: 2rem;
            padding: 1.2rem 1rem;
            border: 1px solid rgba(57, 255, 136, 0.46);
            background:
                linear-gradient(90deg, rgba(57, 255, 136, 0.06), transparent 32%),
                rgba(2, 8, 12, 0.94);
            box-shadow:
                0 0 24px rgba(57, 255, 136, 0.08),
                inset 0 0 28px rgba(0, 0, 0, 0.4);
        }

        .product-price-arrow {
            position: relative;
            flex: 0 0 2.2rem;
            width: 2.2rem;
            height: 5.4rem;
            filter: drop-shadow(0 0 8px rgba(57, 255, 136, 0.8));
        }

        .product-price-arrow::before {
            content: '';
            position: absolute;
            left: 50%;
            bottom: 0;
            width: 4px;
            height: 4.35rem;
            border-radius: 999px;
            background: #39FF88;
            transform: translateX(-50%);
        }

        .product-price-arrow::after {
            content: '';
            position: absolute;
            top: 0;
            left: 50%;
            width: 0;
            height: 0;
            border-right: 0.8rem solid transparent;
            border-bottom: 1.2rem solid #39FF88;
            border-left: 0.8rem solid transparent;
            transform: translateX(-50%);
        }

        .product-price-data {
            display: flex;
            flex-direction: column;
            align-items: flex-start;
            min-width: 0;
        }

        .product-price-label {
            color: #39FF88;
            font-family: 'Inter', sans-serif;
            font-size: 0.62rem;
            font-weight: 600;
            letter-spacing: 0.2em;
            text-transform: uppercase;
        }

        .product-price-counter {
            display: inline-block;
            margin-top: 0.2rem;
            color: #FF6B3D;
            font-family: 'Space Grotesk', sans-serif;
            font-size: clamp(2.25rem, 7vw, 4.8rem);
            font-weight: 700;
            line-height: 1;
            font-variant-numeric: tabular-nums;
            text-shadow: 0 0 16px rgba(255, 60, 0, 0.68);
            transform-origin: center;
            transition:
                transform 0.35s ease,
                text-shadow 0.35s ease;
        }

        .product-price-counter.is-counting {
            transform: scale(1.055);
            text-shadow:
                0 0 12px rgba(255, 60, 0, 0.9),
                0 0 26px rgba(255, 60, 0, 0.48);
        }

        .product-price-steps {
            margin-top: 0.45rem;
            color: #718096;
            font-family: 'Inter', sans-serif;
            font-size: 0.64rem;
            letter-spacing: 0.08em;
            white-space: nowrap;
        }

        .product-shock-caption {
            margin-top: 1rem;
            color: #718096;
            font-family: 'Inter', sans-serif;
            font-size: 0.78rem;
            line-height: 1.5;
            text-align: right;
        }

        @keyframes shelfScan {
            to { transform: translateY(610%); }
        }

        /* Chapter 2: DRAM trend chart */
        .dram-chart-section {
            position: relative;
            padding: clamp(5rem, 10vw, 9rem) 1rem;
            overflow: hidden;
            border-block: 1px solid rgba(0, 240, 255, 0.22);
            background:
                radial-gradient(circle at 84% 24%, rgba(255, 60, 0, 0.09), transparent 24rem),
                linear-gradient(180deg, #020305, #04090D);
        }

        .dram-chart-section::before {
            content: '';
            position: absolute;
            inset: 0;
            pointer-events: none;
            opacity: 0.28;
            background:
                linear-gradient(rgba(0, 240, 255, 0.11) 1px, transparent 1px),
                linear-gradient(90deg, rgba(0, 240, 255, 0.11) 1px, transparent 1px);
            background-size: 76px 76px;
        }

        .dram-chart-shell {
            position: relative;
            z-index: 1;
            width: min(100%, 76rem);
            margin: 0 auto;
        }

        .dram-chart-header {
            display: flex;
            justify-content: space-between;
            align-items: end;
            gap: 2rem;
            margin-bottom: 1.5rem;
        }

        .dram-chart-kicker {
            margin-bottom: 0.65rem;
            color: #00F0FF;
            font-family: 'Space Grotesk', sans-serif;
            font-size: 0.66rem;
            letter-spacing: 0.24em;
            text-transform: uppercase;
        }

        .dram-chart-header h3 {
            max-width: 18ch;
            color: #F8FAFC;
            font-family: 'Space Grotesk', sans-serif;
            font-size: clamp(2rem, 5vw, 4.6rem);
            font-weight: 700;
            line-height: 0.98;
            letter-spacing: -0.045em;
            text-transform: uppercase;
        }

        .dram-chart-badge {
            min-width: 10.5rem;
            padding: 0.9rem 1rem;
            border: 1px solid #FF3C00;
            background: rgba(255, 60, 0, 0.07);
            color: #94A3B8;
            font-family: 'Space Grotesk', sans-serif;
            text-align: right;
            text-transform: uppercase;
        }

        .dram-chart-badge span {
            display: block;
            font-size: 0.58rem;
            letter-spacing: 0.16em;
        }

        .dram-chart-badge strong {
            display: block;
            margin-top: 0.25rem;
            color: #FF6B3D;
            font-size: 2.15rem;
            text-shadow: 0 0 16px rgba(255, 60, 0, 0.55);
        }

        .dram-chart-frame {
            position: relative;
            padding: clamp(0.5rem, 1.5vw, 1rem);
            border: 1px solid rgba(0, 240, 255, 0.35);
            background: rgba(2, 6, 9, 0.92);
            box-shadow:
                0 0 44px rgba(0, 240, 255, 0.08),
                inset 0 0 46px rgba(0, 0, 0, 0.58);
        }

        .dram-chart-frame svg {
            width: 100%;
            height: auto;
            display: block;
        }

        .dram-grid path {
            fill: none;
            stroke: rgba(148, 163, 184, 0.18);
            stroke-width: 1;
        }

        .dram-axis-labels {
            fill: #718096;
            font-family: 'Space Grotesk', sans-serif;
            font-size: 17px;
        }

        .dram-trend-area {
            fill: url(#dram-area-gradient);
            opacity: 0;
            transition: opacity 1s ease 0.65s;
        }

        .dram-trend-area.is-drawn {
            opacity: 1;
        }

        .dram-trend-line {
            fill: none;
            stroke: #00F0FF;
            stroke-width: 5;
            stroke-linecap: round;
            stroke-linejoin: round;
            stroke-dasharray: 1800;
            stroke-dashoffset: 1800;
            filter: drop-shadow(0 0 8px rgba(0, 240, 255, 0.62));
            transition: stroke-dashoffset 2.2s cubic-bezier(0.16, 1, 0.3, 1);
        }

        .dram-trend-line.is-drawn {
            stroke-dashoffset: 0;
        }

        .dram-last-points circle {
            fill: #020305;
            stroke: #00F0FF;
            stroke-width: 4;
            filter: drop-shadow(0 0 6px rgba(0, 240, 255, 0.68));
        }

        .dram-annotation path {
            fill: none;
            stroke: #FF6B3D;
            stroke-width: 3;
        }

        .dram-annotation text {
            fill: #CBD5E1;
            font-family: 'Space Grotesk', sans-serif;
            font-size: 19px;
        }

        .dram-annotation text:first-of-type {
            fill: #FF6B3D;
            font-size: 28px;
            font-weight: 700;
        }

        .dram-chart-note {
            margin-top: 0.85rem;
            color: #64748B;
            font-family: 'Inter', sans-serif;
            font-size: 0.7rem;
            letter-spacing: 0.06em;
            text-align: right;
        }

        /* Chapter 2: AI memory market comparison dashboard */
        .memory-market-section .dram-chart-header h3 {
            max-width: 15ch;
        }

        .memory-market-section .dram-chart-badge strong {
            font-size: clamp(1.6rem, 3vw, 2.4rem);
        }

        .memory-dashboard {
            display: grid;
            gap: 1rem;
            padding: clamp(0.7rem, 1.5vw, 1.15rem);
        }

        .memory-panel {
            position: relative;
            padding: clamp(1.25rem, 3vw, 2rem);
            overflow: hidden;
            border: 1px solid rgba(0, 240, 255, 0.2);
            background:
                linear-gradient(115deg, rgba(0, 240, 255, 0.055), transparent 42%),
                rgba(2, 7, 10, 0.88);
        }

        .memory-panel::before {
            content: '';
            position: absolute;
            inset: 0;
            pointer-events: none;
            opacity: 0.2;
            background:
                linear-gradient(rgba(0, 240, 255, 0.12) 1px, transparent 1px),
                linear-gradient(90deg, rgba(0, 240, 255, 0.12) 1px, transparent 1px);
            background-size: 38px 38px;
            mask-image: linear-gradient(90deg, transparent, #000 45%, transparent);
            -webkit-mask-image: linear-gradient(90deg, transparent, #000 45%, transparent);
        }

        .memory-panel__header {
            position: relative;
            z-index: 1;
            display: flex;
            justify-content: space-between;
            align-items: end;
            gap: 1rem;
            margin-bottom: clamp(1.8rem, 4vw, 3rem);
            padding-bottom: 1rem;
            border-bottom: 1px solid rgba(0, 240, 255, 0.2);
        }

        .memory-panel__header > div {
            display: flex;
            align-items: baseline;
            gap: 0.75rem;
        }

        .memory-panel__index {
            color: #00F0FF;
            font-family: 'Space Grotesk', sans-serif;
            font-size: 0.68rem;
            letter-spacing: 0.16em;
        }

        .memory-panel__header h4 {
            color: #F8FAFC;
            font-family: 'Space Grotesk', sans-serif;
            font-size: clamp(1.2rem, 2.6vw, 2rem);
            font-weight: 600;
            line-height: 1.1;
            text-transform: uppercase;
        }

        .memory-panel__unit {
            color: #718096;
            font-family: 'Inter', sans-serif;
            font-size: 0.66rem;
            letter-spacing: 0.12em;
            text-transform: uppercase;
        }

        .range-chart {
            position: relative;
            z-index: 1;
        }

        .range-chart__axis {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            margin: 0 0 0.65rem 15rem;
            color: #64748B;
            font-family: 'Space Grotesk', sans-serif;
            font-size: 0.62rem;
            font-variant-numeric: tabular-nums;
        }

        .range-chart__axis span {
            text-align: center;
        }

        .range-chart__axis span:first-child {
            text-align: left;
        }

        .range-chart__axis span:last-child {
            text-align: right;
        }

        .range-row {
            display: grid;
            grid-template-columns: 14rem minmax(0, 1fr);
            align-items: center;
            gap: 1rem;
            min-height: 4.5rem;
            border-top: 1px solid rgba(148, 163, 184, 0.09);
        }

        .range-row__label {
            min-width: 0;
        }

        .range-row__label strong,
        .range-row__label span {
            display: block;
        }

        .range-row__label strong {
            color: #E2E8F0;
            font-family: 'Space Grotesk', sans-serif;
            font-size: 0.84rem;
            letter-spacing: 0.04em;
        }

        .range-row__label span {
            margin-top: 0.2rem;
            color: #64748B;
            font-family: 'Inter', sans-serif;
            font-size: 0.68rem;
        }

        .range-row__track {
            position: relative;
            height: 2rem;
            background:
                linear-gradient(90deg, rgba(148, 163, 184, 0.13) 1px, transparent 1px),
                linear-gradient(90deg, rgba(0, 240, 255, 0.04), transparent);
            background-size: 25% 100%, auto;
            border-block: 1px solid rgba(148, 163, 184, 0.08);
        }

        .range-row__segment {
            --segment-color: #00F0FF;
            --segment-glow: rgba(0, 240, 255, 0.68);
            position: absolute;
            top: 0.35rem;
            bottom: 0.35rem;
            left: var(--start);
            width: var(--size);
            min-width: 0.42rem;
        }

        .range-row__segment::before {
            content: '';
            position: absolute;
            inset: 0;
            background: var(--segment-color);
            box-shadow: 0 0 16px var(--segment-glow);
            transform: scaleX(0);
            transform-origin: left;
            transition: transform 1.25s cubic-bezier(0.16, 1, 0.3, 1);
        }

        .memory-dashboard.is-visible .range-row__segment::before {
            transform: scaleX(1);
        }

        .range-row:nth-of-type(3) .range-row__segment::before { transition-delay: 0.12s; }
        .range-row:nth-of-type(4) .range-row__segment::before { transition-delay: 0.24s; }
        .range-row:nth-of-type(5) .range-row__segment::before { transition-delay: 0.36s; }
        .range-row:nth-of-type(6) .range-row__segment::before { transition-delay: 0.48s; }

        .range-row__segment--orange {
            --segment-color: #FF6B3D;
            --segment-glow: rgba(255, 60, 0, 0.65);
        }

        .range-row__segment--blue {
            --segment-color: #60A5FA;
            --segment-glow: rgba(96, 165, 250, 0.6);
        }

        .range-row__segment b {
            position: absolute;
            left: 50%;
            top: 50%;
            color: #F8FAFC;
            font-family: 'Space Grotesk', sans-serif;
            font-size: 0.72rem;
            font-weight: 700;
            white-space: nowrap;
            text-shadow: 0 1px 6px #020305;
            transform: translate(-50%, -50%);
            z-index: 1;
        }

        .margin-rings {
            position: relative;
            z-index: 1;
            display: grid;
            grid-template-columns: repeat(3, minmax(0, 1fr));
            gap: 1rem;
        }

        .margin-ring-card {
            padding: clamp(1rem, 2.5vw, 1.7rem);
            border: 1px solid rgba(0, 240, 255, 0.17);
            background: rgba(2, 7, 10, 0.72);
            text-align: center;
        }

        .margin-ring {
            --ring-color: #00F0FF;
            position: relative;
            width: clamp(7.8rem, 14vw, 10rem);
            aspect-ratio: 1;
            display: grid;
            place-items: center;
            margin: 0 auto 1.1rem;
            border-radius: 50%;
            background: conic-gradient(var(--ring-color) calc(var(--value) * 1%), rgba(148, 163, 184, 0.1) 0);
            filter: drop-shadow(0 0 12px rgba(0, 240, 255, 0.25));
            transform: scale(0.82) rotate(-30deg);
            opacity: 0.22;
            transition:
                transform 0.9s cubic-bezier(0.16, 1, 0.3, 1),
                opacity 0.7s ease;
        }

        .memory-dashboard.is-visible .margin-ring {
            transform: scale(1) rotate(0);
            opacity: 1;
        }

        .margin-ring::before {
            content: '';
            position: absolute;
            inset: 0.55rem;
            border-radius: inherit;
            background: #03090D;
            box-shadow: inset 0 0 22px rgba(0, 240, 255, 0.08);
        }

        .margin-ring strong {
            position: relative;
            z-index: 1;
            color: #F8FAFC;
            font-family: 'Space Grotesk', sans-serif;
            font-size: clamp(1.2rem, 2.4vw, 1.8rem);
        }

        .margin-ring--orange {
            --ring-color: #FF6B3D;
            filter: drop-shadow(0 0 12px rgba(255, 60, 0, 0.25));
        }

        .margin-ring--blue {
            --ring-color: #60A5FA;
            filter: drop-shadow(0 0 12px rgba(96, 165, 250, 0.25));
        }

        .margin-ring-card h5 {
            color: #E2E8F0;
            font-family: 'Space Grotesk', sans-serif;
            font-size: 0.86rem;
            letter-spacing: 0.08em;
            text-transform: uppercase;
        }

        .margin-ring-card p {
            margin-top: 0.45rem;
            color: #718096;
            font-family: 'Inter', sans-serif;
            font-size: 0.72rem;
            line-height: 1.5;
        }

        .memory-product-cards {
            display: grid;
            grid-template-columns: repeat(3, minmax(0, 1fr));
            gap: 1rem;
        }

        .memory-product-card {
            position: relative;
            min-height: 14rem;
            padding: 1.4rem;
            overflow: hidden;
            border: 1px solid rgba(0, 240, 255, 0.28);
            background:
                linear-gradient(145deg, rgba(0, 240, 255, 0.08), transparent 45%),
                #03080C;
        }

        .memory-product-card::after {
            content: '';
            position: absolute;
            right: -2.4rem;
            bottom: -2.4rem;
            width: 7rem;
            aspect-ratio: 1;
            border: 1px solid rgba(0, 240, 255, 0.16);
            transform: rotate(45deg);
        }

        .memory-product-card--dram {
            border-color: rgba(255, 60, 0, 0.38);
            background:
                linear-gradient(145deg, rgba(255, 60, 0, 0.1), transparent 45%),
                #070506;
        }

        .memory-product-card--ssd {
            border-color: rgba(96, 165, 250, 0.36);
            background:
                linear-gradient(145deg, rgba(96, 165, 250, 0.09), transparent 45%),
                #03070C;
        }

        .memory-product-card__tag {
            color: #00F0FF;
            font-family: 'Space Grotesk', sans-serif;
            font-size: 0.58rem;
            letter-spacing: 0.18em;
            text-transform: uppercase;
        }

        .memory-product-card--dram .memory-product-card__tag {
            color: #FF6B3D;
        }

        .memory-product-card--ssd .memory-product-card__tag {
            color: #60A5FA;
        }

        .memory-product-card h4 {
            margin-top: 0.75rem;
            color: #F8FAFC;
            font-family: 'Space Grotesk', sans-serif;
            font-size: clamp(1.1rem, 2vw, 1.45rem);
            text-transform: uppercase;
        }

        .memory-product-card strong {
            display: block;
            margin-top: 1.15rem;
            color: #00F0FF;
            font-family: 'Space Grotesk', sans-serif;
            font-size: clamp(1.45rem, 2.7vw, 2.2rem);
            line-height: 1.05;
            text-shadow: 0 0 16px rgba(0, 240, 255, 0.4);
        }

        .memory-product-card--dram strong {
            color: #FF6B3D;
            text-shadow: 0 0 16px rgba(255, 60, 0, 0.4);
        }

        .memory-product-card--ssd strong {
            color: #60A5FA;
            text-shadow: 0 0 16px rgba(96, 165, 250, 0.4);
        }

        .memory-product-card p {
            margin-top: 0.75rem;
            color: #94A3B8;
            font-family: 'Inter', sans-serif;
            font-size: 0.76rem;
            line-height: 1.55;
        }

        /* Editorial quote: Chapter 2 — broadcast panel */
        .editorial-quote {
            position: relative;
            width: min(calc(100% - 2rem), 72rem);
            margin: clamp(4rem, 9vw, 8rem) auto;
        }

        .editorial-quote blockquote {
            margin: 0;
            color: #F8FAFC;
            font-family: Georgia, 'Times New Roman', serif;
            font-size: clamp(1.55rem, 3.6vw, 3.45rem);
            line-height: 1.36;
            text-wrap: pretty;
        }

        .editorial-quote cite {
            display: block;
            margin-top: 1.6rem;
            color: #94A3B8;
            font-family: 'Inter', sans-serif;
            font-size: clamp(0.72rem, 1.25vw, 0.92rem);
            font-style: normal;
            line-height: 1.55;
        }

        .editorial-quote--chapter2 {
            padding: clamp(2rem, 5vw, 4.5rem);
            border: 1px solid rgba(0, 240, 255, 0.38);
            border-left: 7px solid #00F0FF;
            background:
                linear-gradient(110deg, rgba(0, 240, 255, 0.1), transparent 45%),
                #03080C;
            box-shadow: 0 0 44px rgba(0, 240, 255, 0.08);
        }

        .editorial-quote--chapter2::before {
            content: '“';
            position: absolute;
            top: -0.42em;
            right: 0.12em;
            color: rgba(0, 240, 255, 0.12);
            font-family: Georgia, 'Times New Roman', serif;
            font-size: clamp(11rem, 25vw, 23rem);
            line-height: 1;
        }

        .editorial-quote__signal {
            position: relative;
            z-index: 1;
            margin-bottom: 1.5rem;
            color: #00F0FF;
            font-family: 'Space Grotesk', sans-serif;
            font-size: 0.62rem;
            letter-spacing: 0.24em;
            text-transform: uppercase;
        }

        .editorial-quote--chapter2 blockquote,
        .editorial-quote--chapter2 cite {
            position: relative;
            z-index: 1;
        }

        /* Editorial quote: Chapter 3 — angled strategy card */
        .editorial-quote--chapter3 {
            width: min(100%, 62rem);
            margin-top: clamp(5rem, 9vw, 8rem);
            padding: clamp(3rem, 6vw, 5.5rem) clamp(2rem, 6vw, 5rem);
            overflow: hidden;
            border-top: 2px solid #FF3C00;
            border-bottom: 1px solid rgba(255, 60, 0, 0.35);
            background:
                linear-gradient(135deg, rgba(255, 60, 0, 0.13), transparent 36%),
                linear-gradient(315deg, rgba(0, 240, 255, 0.06), transparent 30%),
                #070506;
            clip-path: polygon(0 0, 95% 0, 100% 14%, 100% 100%, 5% 100%, 0 86%);
        }

        .editorial-quote--chapter3::after {
            content: '';
            position: absolute;
            inset: 1rem;
            border: 1px dashed rgba(255, 60, 0, 0.25);
            clip-path: inherit;
            pointer-events: none;
        }

        .editorial-quote--chapter3 blockquote {
            position: relative;
            z-index: 1;
            font-family: 'Space Grotesk', sans-serif;
            font-weight: 500;
            letter-spacing: -0.03em;
        }

        .editorial-quote--chapter3 cite {
            position: relative;
            z-index: 1;
            max-width: 44rem;
            padding-left: 2.8rem;
            color: #FF9A7A;
        }

        .editorial-quote--chapter3 cite::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0.72em;
            width: 2rem;
            height: 1px;
            background: #FF3C00;
        }

        .editorial-quote__chapter-mark {
            position: absolute;
            right: 2rem;
            bottom: -0.18em;
            color: transparent;
            font-family: 'Space Grotesk', sans-serif;
            font-size: clamp(9rem, 22vw, 17rem);
            font-weight: 700;
            line-height: 1;
            -webkit-text-stroke: 1px rgba(255, 60, 0, 0.18);
        }

        @media (max-width: 640px) {
            .head-cover {
                min-height: 100svh;
                place-items: center;
                padding: 4.5rem 0.75rem 6.5rem;
            }

            .head-cover__visual {
                object-position: 52% center;
                filter: brightness(0.56) saturate(0.88) contrast(1.08);
            }

            .head-cover::before {
                background:
                    linear-gradient(
                        180deg,
                        rgba(1, 7, 14, 0.96) 0%,
                        rgba(1, 7, 14, 0.8) 31%,
                        rgba(1, 7, 14, 0.28) 58%,
                        rgba(1, 7, 14, 0.56) 100%
                    );
            }

            .head-cover__inner {
                width: 100%;
                padding: 1.45rem 0.7rem 1.6rem;
            }

            .head-cover__inner::before {
                border-color: rgba(0, 240, 255, 0.24);
                background: rgba(1, 7, 14, 0.76);
                clip-path: none;
                backdrop-filter: blur(5px);
                -webkit-backdrop-filter: blur(5px);
            }

            .head-cover__title {
                max-width: 100%;
                font-size: clamp(1.7rem, 8vw, 2.55rem);
                line-height: 1.2;
                letter-spacing: -0.025em;
            }

            .head-cover__title-line {
                white-space: normal;
            }

            .head-cover__title-line + .head-cover__title-line {
                margin-top: 0.16em;
            }

            .head-cover__orbit {
                width: 100vw;
                right: -56vw;
                top: -22vw;
            }

            .head-cover__scroll {
                right: 1rem;
                bottom: 1.5rem;
            }

            .sapo-section {
                padding-inline: 0.55rem;
            }

            .sapo-laptop {
                width: 100%;
            }

            .sapo-laptop__lid {
                padding: 1.1rem 0.85rem;
                border-width: 3px;
                border-radius: 0;
                clip-path: polygon(0 0, 100% 0, 97.5% 100%, 2.5% 100%);
            }

            .sapo-laptop__screen {
                min-height: auto;
                padding: 2.2rem 1.15rem 1.8rem;
            }

            .sapo-laptop__base {
                width: 100%;
                margin-left: 0;
                height: 4.9rem;
                clip-path: polygon(7% 0, 93% 0, 100% 100%, 0 100%);
            }

            .sapo-laptop__base::before {
                inset: 3px;
                clip-path: polygon(6.7% 0, 93.3% 0, 100% 100%, 0 100%);
            }

            .sapo-laptop__base::after {
                inset: 15% 7% 10%;
            }

            .sapo-label {
                gap: 0.5rem;
                letter-spacing: 0.18em;
            }

            .sapo-text {
                padding-left: 1.35rem;
                font-size: 1.1rem;
                line-height: 1.62;
            }

            .sapo-channel-stage {
                min-height: 23rem;
            }

            .sapo-channel-stage.is-static {
                min-height: 0;
            }

            .step-text,
            .step-text.active {
                transform: none;
            }

            .sapo-laptop__status {
                flex-direction: column;
                gap: 0.35rem;
            }

            .chapter-subtitle {
                grid-template-columns: 1fr;
                border-left-width: 4px;
            }

            .chapter-index {
                width: 3.5rem;
            }

            .chapter-title {
                font-size: clamp(2rem, 10vw, 3rem);
                line-height: 1.08;
            }

            .chapter-body {
                padding-left: 1rem;
            }

            .chapter-story--cinematic .chapter-subtitle {
                min-height: 82svh;
                grid-template-columns: 1fr;
                align-content: center;
                padding: 3rem 1.4rem 5rem;
            }

            .chapter-story--cinematic .chapter-index {
                position: absolute;
                top: 2rem;
                right: 1rem;
                font-size: 8rem;
                opacity: 0.42;
            }

            .chapter-story--cinematic .chapter-title {
                position: relative;
                z-index: 1;
                max-width: 11ch;
                font-size: clamp(3rem, 15.5vw, 5rem);
                line-height: 0.96;
            }

            .chapter-story--cinematic .chapter-subtitle::after {
                right: 1rem;
                bottom: 1.2rem;
            }

            .chapter-subtitle--cinematic {
                min-height: 82svh;
                grid-template-columns: 1fr;
                align-content: center;
                padding: 3rem 1.4rem 5rem;
            }

            .chapter-subtitle--cinematic::before {
                width: 100vw;
                right: -56vw;
            }

            .chapter-subtitle--cinematic .chapter-index {
                position: absolute;
                top: 2rem;
                right: 1rem;
                font-size: 8rem;
                opacity: 0.42;
            }

            .chapter-subtitle--cinematic .chapter-title {
                position: relative;
                z-index: 1;
                max-width: 11ch;
                font-size: clamp(3rem, 10vw, 5rem);
                line-height: 0.96;
            }

            .chapter-subtitle--cinematic::after {
                right: 1rem;
                bottom: 1.2rem;
                max-width: calc(100% - 2rem);
                letter-spacing: 0.18em;
            }

            .product-shock-column {
                min-height: auto;
                padding-inline: 0;
            }

            .product-shock-hud {
                flex-direction: column;
                gap: 0.35rem;
            }

            .product-shelf {
                min-height: 31rem;
                padding: 1rem;
            }

            .product-shelf::before {
                top: 40%;
            }

            .product-shelf::after {
                top: auto;
                bottom: 29%;
            }

            .product-icons {
                gap: 0.4rem;
            }

            .product-slot {
                width: 100%;
                min-height: 0;
                display: flex;
                flex-direction: column;
                align-items: center;
                margin: 0;
                padding: 0.7rem 0.3rem;
                transform: translateY(3rem) scale(0.92);
            }

            .product-slot.is-shocked {
                transform: none;
            }

            .product-slot__icon {
                height: 5.2rem;
            }

            .product-slot__copy {
                width: 100%;
                padding-top: 0.55rem;
            }

            .product-slot__name {
                font-size: 0.56rem;
                letter-spacing: 0.12em;
            }

            .product-price-meter {
                min-height: 8.5rem;
                gap: 1rem;
                margin-top: 1.25rem;
                padding-inline: 0.7rem;
            }

            .product-price-arrow {
                transform: scale(0.86);
            }

            .product-price-counter {
                font-size: clamp(2.4rem, 14vw, 3.8rem);
            }

            .product-price-steps {
                font-size: 0.55rem;
            }

            .dram-chart-section {
                padding-inline: 0.55rem;
            }

            .dram-chart-header {
                align-items: stretch;
                flex-direction: column;
                gap: 1rem;
            }

            .dram-chart-header h3 {
                max-width: 14ch;
                font-size: 2.3rem;
            }

            .dram-chart-badge {
                min-width: 0;
                display: flex;
                justify-content: space-between;
                align-items: center;
                text-align: left;
            }

            .dram-chart-badge strong {
                margin: 0;
            }

            .dram-chart-frame {
                overflow-x: visible;
            }

            .dram-chart-frame svg {
                min-width: 47rem;
            }

            .dram-chart-note {
                text-align: left;
            }

            .memory-dashboard {
                gap: 0.7rem;
                padding: 0.5rem;
            }

            .memory-panel {
                padding: 1.15rem 0.9rem;
            }

            .memory-panel__header {
                align-items: flex-start;
                flex-direction: column;
                gap: 0.6rem;
                margin-bottom: 1.5rem;
            }

            .memory-panel__header > div {
                align-items: flex-start;
            }

            .memory-panel__header h4 {
                font-size: 1.2rem;
            }

            .range-chart__axis {
                margin-left: 8.25rem;
                font-size: 0.52rem;
            }

            .range-row {
                grid-template-columns: 7.5rem minmax(0, 1fr);
                gap: 0.75rem;
                min-height: 4.2rem;
            }

            .range-row__label strong {
                font-size: 0.68rem;
            }

            .range-row__label span {
                font-size: 0.6rem;
            }

            .range-row__segment b {
                font-size: 0.6rem;
            }

            .range-row:nth-child(3) .range-row__segment b {
                right: 0;
                left: auto;
                transform: translateY(-50%);
            }

            .margin-rings {
                grid-template-columns: 1fr;
            }

            .margin-ring-card {
                display: grid;
                grid-template-columns: 6.8rem minmax(0, 1fr);
                grid-template-rows: auto auto;
                column-gap: 1rem;
                align-items: center;
                text-align: left;
            }

            .margin-ring {
                grid-row: 1 / 3;
                width: 6.4rem;
                margin: 0;
            }

            .margin-ring-card h5 {
                align-self: end;
            }

            .margin-ring-card p {
                align-self: start;
            }

            .memory-product-cards {
                grid-template-columns: 1fr;
                gap: 0.7rem;
            }

            .memory-product-card {
                min-height: 0;
            }

            .editorial-quote {
                width: calc(100% - 1.1rem);
            }

            .editorial-quote blockquote {
                font-size: 1.55rem;
                line-height: 1.42;
            }

            .editorial-quote--chapter2 {
                padding: 2rem 1.4rem;
            }

            .editorial-quote--chapter3 {
                padding: 3.5rem 1.5rem;
                clip-path: polygon(0 0, 91% 0, 100% 7%, 100% 100%, 9% 100%, 0 93%);
            }

            .editorial-quote__chapter-mark {
                right: 0.7rem;
                font-size: 9rem;
            }
        }

        @media (prefers-reduced-motion: reduce) {
            html {
                scroll-behavior: auto;
            }

            *,
            *::before,
            *::after {
                animation-duration: 0.01ms !important;
                animation-iteration-count: 1 !important;
                transition-duration: 0.01ms !important;
            }

            .js .scroll-reveal,
            .js .scroll-reveal.is-visible {
                opacity: 1;
                transform: none;
                filter: none;
            }
        }