body {
            background-color: #f9f9fb;
            color: #1a1c1d;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            font-optical-sizing: auto;
        }
        .material-symbols-outlined {
            font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
        }
        .glass-panel {
            background: rgba(255, 255, 255, 0.72);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border: 1px solid rgba(255, 255, 255, 0.3);
        }

        .model-loading-progress {
            width: 100%;
            transform: scaleX(0);
            transform-origin: left center;
            will-change: transform;
            transition: transform 180ms linear, background-color 180ms ease;
        }

        .model-loading-progress[data-state='error'] {
            background: #ff3b30;
        }

        .model-status {
            transition: opacity 220ms ease;
        }

        .model-status[data-hidden='true'] {
            opacity: 0;
        }

        .model-viewer-controls {
            opacity: 0;
            pointer-events: none;
            transition: opacity 180ms ease;
        }

        main > div:first-child:is(:hover, :focus-within) .model-viewer-controls {
            opacity: 1;
            pointer-events: auto;
        }

        .model-viewer-control {
            width: 44px;
            height: 44px;
            padding: 0;
            cursor: pointer;
            touch-action: manipulation;
            transition: color 160ms ease, background-color 160ms ease, transform 160ms cubic-bezier(.23, 1, .32, 1);
        }

        .model-viewer-control:active {
            transform: scale(.97);
        }

        @media (hover: hover) and (pointer: fine) {
            .model-viewer-control:hover {
                background: var(--md-sys-color-surface-container-high);
            }
        }

        @media (hover: none), (pointer: coarse) {
            .model-viewer-controls {
                opacity: 1;
                pointer-events: auto;
            }
        }

        @media (prefers-reduced-transparency: reduce) {
            .glass-panel {
                background: #fff;
                backdrop-filter: none;
                -webkit-backdrop-filter: none;
            }
        }

        @media (prefers-reduced-motion: reduce) {
            .model-viewer-control {
                transition-property: color, background-color;
            }

            .model-viewer-control:active {
                transform: none;
            }
        }

        .model-picker {
            flex: 0 0 auto;
            padding: 18px;
            border: 1px solid var(--site-line);
            border-radius: var(--site-card-radius);
            background: #fff;
            box-shadow: 0 24px 60px rgba(29, 29, 31, 0.055);
        }

        .model-picker__heading {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 16px;
            margin-bottom: 14px;
        }

        .model-picker__heading p {
            margin-bottom: 3px;
            color: var(--site-primary-dark);
            font-size: 13px;
            font-weight: 750;
            letter-spacing: 0.1em;
            line-height: 1.4;
        }

        .model-picker__heading h2 {
            color: var(--site-text);
            font-size: 20px;
            font-weight: 750;
            letter-spacing: -0.02em;
            line-height: 1.3;
        }

        .model-picker__heading > span {
            color: var(--site-muted);
            font-size: 14px;
            font-weight: 650;
            line-height: 1.4;
        }

        .model-picker__grid {
            display: grid;
            grid-template-columns: repeat(2, minmax(0, 1fr));
            gap: 8px;
        }

        .model-picker__button {
            display: flex;
            align-items: center;
            gap: 8px;
            min-height: 44px;
            padding: 9px 11px;
            border: 1px solid var(--site-line);
            border-radius: 11px;
            background: var(--site-surface-low);
            color: var(--site-text);
            cursor: pointer;
            font: inherit;
            font-size: 14px;
            font-weight: 680;
            line-height: 1.35;
            text-align: left;
            transition: border-color 160ms ease, background-color 160ms ease, color 160ms ease;
        }

        .model-picker__button span {
            color: var(--site-muted);
            font-size: 12px;
            font-variant-numeric: tabular-nums;
            letter-spacing: 0.04em;
        }

        .model-picker__button:is(:hover, :focus-visible) {
            border-color: rgba(0, 113, 227, 0.35);
            outline: none;
        }

        .model-picker__button:focus-visible {
            box-shadow: 0 0 0 3px rgba(0, 113, 227, 0.16);
        }

        .model-picker__button.is-active {
            border-color: var(--site-primary);
            background: var(--site-primary);
            color: #fff;
        }

        .model-picker__button.is-active span {
            color: rgba(255, 255, 255, 0.72);
        }

        .character-profile {
            position: relative;
            display: flex;
            flex: 1 0 auto;
            flex-direction: column;
            justify-content: space-between;
            overflow: hidden;
            padding: clamp(26px, 1.65vw, 30px);
            border: 1px solid var(--site-line);
            border-radius: var(--site-card-radius);
            background: #fff;
            box-shadow: 0 24px 60px rgba(29, 29, 31, 0.055);
        }

        .character-profile__header {
            display: flex;
            align-items: flex-start;
            justify-content: space-between;
            gap: 18px;
        }

        .character-profile__header > div {
            min-width: 0;
        }

        .character-profile__eyebrow {
            margin-bottom: 7px;
            color: var(--site-primary-dark);
            font-size: 14px;
            font-weight: 700;
            letter-spacing: 0.1em;
            line-height: 1.4;
        }

        .character-profile h1 {
            color: var(--site-text);
            font-size: clamp(38px, 2.2vw, 42px);
            font-weight: 750;
            letter-spacing: -0.035em;
            line-height: 1.06;
            white-space: nowrap;
        }

        .character-profile__role {
            display: inline-flex;
            flex: none;
            align-items: center;
            gap: 5px;
            margin-top: 4px;
            padding: 8px 12px;
            border: 1px solid rgba(0, 113, 227, 0.14);
            border-radius: 999px;
            background: rgba(0, 113, 227, 0.055);
            color: var(--site-primary-dark);
            font-size: 14px;
            font-weight: 700;
            line-height: 1.35;
            white-space: nowrap;
        }

        .character-profile__role .material-symbols-outlined {
            font-size: 17px;
        }

        .character-profile__intro {
            margin: 22px 0;
            color: #51545b;
            max-width: 72ch;
            font-size: 18px;
            line-height: 1.8;
            text-wrap: pretty;
        }

        .character-profile__facts {
            display: grid;
            grid-template-columns: repeat(2, minmax(0, 1fr));
            gap: 12px;
        }

        .character-profile__facts > div {
            padding: 14px 15px;
            border: 1px solid var(--site-line);
            border-radius: 12px;
            background: var(--site-surface-low);
        }

        .character-profile dt,
        .character-profile__label {
            color: var(--site-muted);
            font-size: 14px;
            font-weight: 700;
            letter-spacing: 0.08em;
            line-height: 1.4;
        }

        .character-profile dd {
            margin-top: 6px;
            color: var(--site-text);
            font-size: 16px;
            font-weight: 650;
            line-height: 1.45;
        }

        .character-profile__traits {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-top: 16px;
        }

        .character-profile__label {
            flex: none;
        }

        .character-profile__traits ul {
            display: flex;
            flex-wrap: wrap;
            gap: 7px;
        }

        .character-profile__traits li {
            padding: 6px 10px;
            border: 1px solid rgba(0, 113, 227, 0.12);
            border-radius: 999px;
            background: rgba(0, 113, 227, 0.045);
            color: var(--site-text);
            font-size: 14px;
            font-weight: 650;
            line-height: 1.35;
        }

        .character-profile__section {
            margin-top: 20px;
            padding-top: 18px;
            border-top: 1px solid var(--site-line);
        }

        .character-profile__section-title {
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 10px;
        }

        .character-profile__section-title::before {
            width: 3px;
            height: 16px;
            flex: none;
            border-radius: 999px;
            background: var(--site-primary);
            content: '';
        }

        .character-profile__section-title h2 {
            color: var(--site-text);
            font-size: 17px;
            font-weight: 750;
            line-height: 1.4;
        }

        .character-profile__section > p:not(.character-profile__formula) {
            color: #51545b;
            max-width: 72ch;
            font-size: 17px;
            line-height: 1.8;
            text-wrap: pretty;
        }

        .character-profile__formula {
            display: grid;
            grid-template-columns: 1fr auto 1fr;
            align-items: center;
            gap: 10px;
            color: var(--site-text);
            font-size: 16px;
            font-weight: 750;
            text-align: center;
        }

        .character-profile__formula span {
            padding: 10px 12px;
            border: 1px solid var(--site-line);
            border-radius: 10px;
            background: var(--site-surface-low);
        }

        .character-profile__formula b {
            color: var(--site-primary);
            font-size: 18px;
        }

        .character-profile__specs {
            display: grid;
            grid-template-columns: repeat(2, minmax(0, 1fr));
            gap: 1px;
            margin-top: 20px;
            overflow: hidden;
            border-radius: 12px;
            background: var(--site-line);
        }

        .character-profile__specs > div {
            padding: 12px 8px;
            background: var(--site-surface-low);
            text-align: center;
        }

        .character-profile__specs dd {
            font-size: 15px;
        }

        .model-download-card {
            flex: 0 0 auto;
            padding: 18px;
            border: 1px solid var(--site-line);
            border-radius: var(--site-card-radius);
            background: #fff;
            box-shadow: 0 24px 60px rgba(29, 29, 31, 0.055);
        }

        @media (max-width: 767px) {
            .model-picker {
                padding: 16px;
            }

            .character-profile {
                flex: 0 0 auto;
                justify-content: flex-start;
                padding: 22px;
            }

            .character-profile h1 {
                font-size: 36px;
            }

            .character-profile__header {
                align-items: flex-start;
                flex-direction: column;
                gap: 10px;
            }

            .character-profile__role {
                margin-top: 0;
            }
        }