:root {
                --project-vh: 90vh;
                --visual-panel-offset: 20px;
                --focus-scale: 1;
                --focus-x: 0%;
                --focus-y: 0%;
                --focus-fit: cover;
            }

            html {
                scroll-behavior: smooth;
            }

            body {
                padding-bottom: 4.6rem;
            }

            .story-shell {
                --dock-ease: cubic-bezier(0.22, 0.72, 0.2, 1);
            }

            .dummy-section {
                min-height: 90vh;
                display: flex;
                align-items: center;
                justify-content: center;
                padding: 2rem;
                border-top: 1px solid rgba(16, 34, 44, 0.08);
                border-bottom: 1px solid rgba(16, 34, 44, 0.08);
                background: #f2f5f8;
                color: #334955;
                text-align: center;
            }

            .dummy-section h2 {
                margin: 0 0 0.5rem;
                font-size: clamp(1.2rem, 1rem + 1vw, 1.8rem);
                color: #10222c;
            }

            .dummy-section p {
                margin: 0;
                font-size: 0.95rem;
                max-width: 58ch;
            }

            .story-grid {
                display: grid;
                grid-template-columns: minmax(0, 2fr) minmax(280px, 1fr);
                gap: 0;
                align-items: start;
            }

            .visual-panel {
                grid-column: 1;
                position: sticky;
                top: var(--visual-panel-offset);
                left: 0;
                height: calc(var(--project-vh) - var(--visual-panel-offset));
                min-height: calc(var(--project-vh) - var(--visual-panel-offset));
                padding: 0;
                margin: 0;
                display: flex;
                align-items: stretch;
                justify-content: stretch;
                opacity: 1;
                transform: translateY(0);
                transition: transform 820ms var(--dock-ease), opacity 820ms var(--dock-ease);
            }

            .story-shell:not(.is-entered) .visual-panel {
                opacity: 0;
                transform: translateY(80px);
            }

            .focus-frame {
                position: relative;
                width: 100%;
                height: calc(var(--project-vh) - var(--visual-panel-offset));
                border-radius: 0;
                overflow: hidden;
                border: 0;
                box-shadow: none;
                background: #dde3ea;
            }

            .focus-scene {
                position: absolute;
                inset: 0;
                transform-origin: 50% 50%;
                transform: translate(var(--focus-x), var(--focus-y)) scale(var(--focus-scale));
                transition: transform 950ms cubic-bezier(0.42, 0, 1, 1);
                will-change: transform;
            }

            .focus-image {
                display: block;
                width: 100%;
                height: 100%;
                object-fit: cover;
                object-position: center center;
            }

            .marker-layer {
                position: absolute;
                inset: 0;
                z-index: 2;
                pointer-events: none;
            }

            .focus-center {
                position: absolute;
                left: 50%;
                top: 50%;
                width: 2rem;
                height: 2rem;
                transform: translate(-50%, -50%);
                border-radius: 999px;
                border: 1px solid rgba(255, 255, 255, 0.85);
                box-shadow: 0 0 0 1px rgba(16, 34, 44, 0.3), 0 0 0 10px rgba(255, 255, 255, 0.08);
                opacity: 0;
                transition: opacity 180ms ease;
                pointer-events: none;
                z-index: 3;
            }

            .focus-center::before,
            .focus-center::after {
                content: "";
                position: absolute;
                left: 50%;
                top: 50%;
                background: rgba(255, 255, 255, 0.85);
                transform: translate(-50%, -50%);
            }

            .focus-center::before {
                width: 0.8rem;
                height: 1px;
            }

            .focus-center::after {
                width: 1px;
                height: 0.8rem;
            }

            .story-shell.is-focused .focus-center {
                opacity: 1;
            }

            .image-marker {
                position: absolute;
                left: var(--marker-x);
                top: var(--marker-y);
                transform: translate(-50%, -50%);
                width: 1.15rem;
                height: 1.15rem;
                padding: 0;
                border: 0;
                border-radius: 999px;
                background: #ffffff;
                box-shadow: 0 0 0 1px rgba(10, 37, 49, 0.18), 0 10px 18px rgba(7, 27, 38, 0.22);
                cursor: pointer;
                pointer-events: auto;
                transition: transform 220ms ease, background-color 220ms ease, box-shadow 220ms ease;
            }

            .image-marker::before {
                content: "";
                position: absolute;
                inset: 0.29rem;
                border-radius: 999px;
                background: #0a6b72;
            }

            .image-marker::after {
                content: "";
                position: absolute;
                inset: -0.42rem;
                border: 1px solid rgba(10, 107, 114, 0.38);
                border-radius: 999px;
                opacity: 0;
                transform: scale(0.8);
                transition: opacity 220ms ease, transform 220ms ease;
            }

            .image-marker:hover,
            .image-marker:focus-visible,
            .image-marker.is-active {
                transform: translate(-50%, -50%) scale(1.12);
                background: #f3fbfb;
                box-shadow: 0 0 0 1px rgba(10, 107, 114, 0.34), 0 14px 28px rgba(7, 27, 38, 0.24);
                outline: none;
            }

            .image-marker:hover::after,
            .image-marker:focus-visible::after,
            .image-marker.is-active::after {
                opacity: 1;
                transform: scale(1);
            }

            .image-marker-label {
                position: absolute;
                left: calc(var(--marker-x) + 1.2rem);
                top: var(--marker-y);
                transform: translateY(-50%);
                padding: 0.28rem 0.52rem;
                border-radius: 999px;
                background: rgba(17, 36, 51, 0.74);
                color: #ffffff;
                font-size: 0.7rem;
                letter-spacing: 0.04em;
                text-transform: uppercase;
                opacity: 0;
                transition: opacity 220ms ease;
                pointer-events: none;
                white-space: nowrap;
            }

            .image-marker-label.is-left {
                left: calc(var(--marker-x) - 1.2rem);
                transform: translate(-100%, -50%);
            }

            .image-marker:hover + .image-marker-label,
            .image-marker:focus-visible + .image-marker-label,
            .image-marker.is-active + .image-marker-label {
                opacity: 1;
            }

            .steps-panel {
                grid-column: 2;
                position: relative;
                top: auto;
                height: auto;
                overflow: visible;
                padding: 0.65rem 0.85rem 0.85rem 0.65rem;
            }

            .step-nav {
                position: fixed;
                left: 0;
                right: 0;
                bottom: 0;
                z-index: 40;
                display: flex;
                flex-wrap: nowrap;
                gap: 0.45rem;
                padding: 0.55rem 0.85rem;
                margin-bottom: 0;
                background: rgba(247, 248, 250, 0.96);
                border-top: 1px solid rgba(16, 34, 44, 0.12);
                overflow-x: auto;
                overflow-y: hidden;
                scrollbar-width: thin;
                backdrop-filter: blur(4px);
                opacity: 0;
                transform: translateY(16px);
                pointer-events: none;
                transition: opacity 220ms ease, transform 220ms ease;
            }

            .story-shell.is-in-view .step-nav {
                opacity: 1;
                transform: translateY(0);
                pointer-events: auto;
            }

            .step-nav-item {
                display: flex;
                align-items: center;
                gap: 0.45rem;
                flex: 0 0 auto;
                min-width: 8rem;
                text-align: left;
                padding: 0.5rem 0.55rem;
                border-radius: 10px;
                border: 1px solid rgba(16, 34, 44, 0.1);
                background: rgba(255, 255, 255, 0.72);
                color: #243843;
                cursor: pointer;
                transition: border-color 180ms ease, box-shadow 180ms ease, background-color 180ms ease;
            }

            .step-nav-item:hover,
            .step-nav-item:focus-visible {
                border-color: rgba(10, 107, 114, 0.34);
                box-shadow: 0 4px 12px rgba(10, 107, 114, 0.12);
                background: rgba(255, 255, 255, 0.95);
                outline: none;
            }

            .step-nav-item.is-active {
                border-color: rgba(10, 107, 114, 0.45);
                background: rgba(10, 107, 114, 0.12);
                box-shadow: 0 5px 14px rgba(10, 107, 114, 0.16);
            }

            .step-nav-index {
                flex: 0 0 auto;
                display: inline-flex;
                align-items: center;
                justify-content: center;
                min-width: 1.5rem;
                height: 1.5rem;
                border-radius: 999px;
                font-size: 0.66rem;
                font-weight: 700;
                color: #0a6b72;
                background: rgba(10, 107, 114, 0.14);
            }

            .step-nav-label {
                font-size: 0.74rem;
                letter-spacing: 0.01em;
                line-height: 1.25;
                white-space: nowrap;
            }

            .intro-panel {
                min-height: var(--project-vh);
                display: flex;
                align-items: center;
            }

            .intro-card {
                max-width: 620px;
                width: 100%;
                background: rgba(255, 255, 255, 0.9);
                border: 1px solid rgba(16, 34, 44, 0.1);
                border-radius: 16px;
                padding: 1.5rem 1.4rem 1.55rem;
                box-shadow: 0 14px 32px rgba(18, 40, 54, 0.08);
            }

            .intro-kicker {
                margin: 0 0 0.5rem;
                font-size: 0.76rem;
                text-transform: uppercase;
                letter-spacing: 0.08em;
                font-weight: 700;
                color: #0a6b72;
            }

            .intro-title {
                margin: 0;
                font-size: clamp(2rem, 1.45rem + 1.8vw, 3rem);
                line-height: 1.1;
                color: #112433;
            }

            .intro-copy {
                margin: 0.9rem 0 0;
                line-height: 1.58;
                color: #31424e;
                max-width: 56ch;
            }

            .story-step {
                min-height: var(--project-vh);
                display: flex;
                align-items: center;
            }

            .step-card {
                max-width: 580px;
                width: 100%;
                background: rgba(255, 255, 255, 0.82);
                backdrop-filter: blur(2px);
                border: 1px solid rgba(16, 34, 44, 0.08);
                border-radius: 16px;
                padding: 1.25rem 1.2rem 1.35rem;
                box-shadow: 0 14px 32px rgba(18, 40, 54, 0.08);
                opacity: 0.4;
                transform: translateY(18px) scale(0.985);
                transition: opacity 320ms ease, transform 320ms ease;
            }

            .story-step.is-active .step-card {
                opacity: 1;
                transform: translateY(0) scale(1);
            }

            .step-kicker {
                font-size: 0.84rem;
                text-transform: uppercase;
                letter-spacing: 0.1em;
                font-weight: 700;
                margin-bottom: 0.55rem;
            }

            .step-title {
                margin: 0;
                font-size: clamp(1.65rem, 1.18rem + 1.38vw, 2.35rem);
                line-height: 1.15;
            }

            .step-copy {
                margin-top: 0.82rem;
                margin-bottom: 0;
                line-height: 1.55;
                font-size: larger;
            }

            @media (max-width: 1024px) {
                .story-grid {
                    grid-template-columns: 1fr;
                }

                .visual-panel {
                    position: relative;
                    top: auto;
                    left: auto;
                    grid-column: 1 / -1;
                    height: var(--project-vh);
                    min-height: var(--project-vh);
                    padding: 0;
                    z-index: 3;
                    transform: translateY(48px);
                }

                .focus-frame {
                    width: 100%;
                    height: 100%;
                    border-radius: 0;
                }

                .image-marker-label {
                    display: none;
                }

                .focus-center {
                    width: 1.6rem;
                    height: 1.6rem;
                }

                .steps-panel {
                    grid-column: 1 / -1;
                    position: relative;
                    top: auto;
                    height: auto;
                    overflow: visible;
                    padding: 0.8rem 1rem 1.2rem;
                }

                .step-nav {
                    position: fixed;
                    left: 0;
                    right: 0;
                    bottom: 0;
                }

                .intro-panel {
                    min-height: var(--project-vh);
                }
            }