:root {
            --aisitex-page: #f4f1ea;
            --aisitex-surface: #fbfaf6;
            --aisitex-petrol: #245d61;
            --aisitex-petrol-deep: #173f43;
            --aisitex-petrol-dark: #102f33;
            --aisitex-orange: #d96b32;
            --aisitex-orange-dark: #b95424;
            --aisitex-green: #2f765b;
            --aisitex-amber: #b2782d;
            --aisitex-neutral: #687174;
            --aisitex-text: #172326;
            --aisitex-muted: #526064;
            --aisitex-border: #cbd0c9;
            --aisitex-white: #fffefa;
        }

        * {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            background: var(--aisitex-page);
            color: var(--aisitex-text);
            font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }

        a {
            color: inherit;
            text-decoration: none;
        }

        button,
        a {
            -webkit-tap-highlight-color: transparent;
        }

        button {
            font: inherit;
        }

        .aisitex-skip-link {
            position: fixed;
            z-index: 20;
            top: 12px;
            left: 12px;
            padding: 10px 14px;
            background: var(--aisitex-orange);
            color: var(--aisitex-white);
            transform: translateY(-160%);
            transition: transform 160ms ease;
        }

        .aisitex-skip-link:focus {
            transform: translateY(0);
        }

        .aisitex-site-header {
            position: relative;
            z-index: 10;
            background: var(--aisitex-petrol-deep);
            color: var(--aisitex-white);
        }

        .aisitex-header-inner {
            width: min(1180px, calc(100% - 48px));
            min-height: 82px;
            margin: 0 auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 28px;
        }

        .aisitex-brand {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            min-width: 0;
        }

        .aisitex-brand-mark {
            display: grid;
            width: 36px;
            height: 36px;
            place-items: center;
            border: 1px solid rgba(255, 254, 250, 0.56);
            color: var(--aisitex-white);
            font-family: Inter, Arial, sans-serif;
            font-size: 13px;
            font-weight: 800;
            letter-spacing: 0.06em;
        }

        .aisitex-brand-copy {
            display: grid;
            gap: 0;
        }

        .aisitex-brand-name {
            font-size: 17px;
            font-weight: 700;
            line-height: 1.25;
            letter-spacing: 0.04em;
        }

        .aisitex-brand-caption {
            color: rgba(255, 254, 250, 0.62);
            font-family: Inter, Arial, sans-serif;
            font-size: 9px;
            line-height: 1.3;
            letter-spacing: 0.18em;
            text-transform: uppercase;
        }

        .aisitex-nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .aisitex-nav-link {
            position: relative;
            display: inline-flex;
            align-items: center;
            min-height: 42px;
            padding: 0 14px;
            color: rgba(255, 254, 250, 0.72);
            font-size: 14px;
            white-space: nowrap;
            transition: color 160ms ease;
        }

        .aisitex-nav-link::after {
            position: absolute;
            right: 14px;
            bottom: 4px;
            left: 14px;
            height: 2px;
            background: var(--aisitex-orange);
            content: "";
            transform: scaleX(0);
            transform-origin: left;
            transition: transform 160ms ease;
        }

        .aisitex-nav-link:hover,
        .aisitex-nav-link:focus-visible,
        .aisitex-nav-link.active {
            color: var(--aisitex-white);
        }

        .aisitex-nav-link:hover::after,
        .aisitex-nav-link:focus-visible::after,
        .aisitex-nav-link.active::after {
            transform: scaleX(1);
        }

        .aisitex-nav-toggle {
            display: none;
            width: 44px;
            height: 44px;
            padding: 0;
            border: 1px solid rgba(255, 254, 250, 0.28);
            background: transparent;
            color: var(--aisitex-white);
            cursor: pointer;
        }

        .aisitex-nav-toggle-icon,
        .aisitex-nav-toggle-icon::before,
        .aisitex-nav-toggle-icon::after {
            display: block;
            width: 18px;
            height: 1px;
            margin: 0 auto;
            background: currentColor;
            content: "";
            transition: transform 160ms ease;
        }

        .aisitex-nav-toggle-icon::before {
            transform: translateY(-6px);
        }

        .aisitex-nav-toggle-icon::after {
            transform: translateY(5px);
        }

        .aisitex-nav-toggle[aria-expanded="true"] .aisitex-nav-toggle-icon {
            background: transparent;
        }

        .aisitex-nav-toggle[aria-expanded="true"] .aisitex-nav-toggle-icon::before {
            transform: translateY(0) rotate(45deg);
        }

        .aisitex-nav-toggle[aria-expanded="true"] .aisitex-nav-toggle-icon::after {
            transform: translateY(-1px) rotate(-45deg);
        }

        .aisitex-hero {
            background: var(--aisitex-petrol-deep);
            color: var(--aisitex-white);
        }

        .aisitex-hero-inner {
            width: min(1180px, calc(100% - 48px));
            margin: 0 auto;
            padding: 72px 0 76px;
            display: grid;
            grid-template-columns: minmax(260px, 0.77fr) minmax(500px, 1.23fr);
            align-items: center;
            gap: clamp(44px, 7vw, 104px);
        }

        .aisitex-hero-copy {
            max-width: 390px;
        }

        .aisitex-eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 9px;
            margin: 0 0 22px;
            color: #e6a276;
            font-family: Inter, Arial, sans-serif;
            font-size: 11px;
            font-weight: 700;
            letter-spacing: 0.17em;
            text-transform: uppercase;
        }

        .aisitex-eyebrow::before {
            display: block;
            width: 26px;
            height: 1px;
            background: var(--aisitex-orange);
            content: "";
        }

        .aisitex-hero-title {
            max-width: 390px;
            margin: 0;
            font-size: clamp(40px, 5vw, 64px);
            font-weight: 700;
            letter-spacing: 0;
            line-height: 1.12;
            text-wrap: balance;
        }

        .aisitex-hero-lede {
            max-width: 355px;
            margin: 24px 0 0;
            color: rgba(255, 254, 250, 0.72);
            font-size: 16px;
            line-height: 1.85;
        }

        .aisitex-hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-top: 32px;
        }

        .aisitex-button {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            min-height: 48px;
            padding: 0 17px;
            border: 1px solid transparent;
            font-size: 14px;
            font-weight: 700;
            line-height: 1;
            cursor: pointer;
            transition: background-color 160ms ease, border-color 160ms ease, color 160ms ease, transform 160ms ease;
        }

        .aisitex-button:hover {
            transform: translateY(-2px);
        }

        .aisitex-button:focus-visible,
        .aisitex-device-item:focus-visible,
        .aisitex-nav-toggle:focus-visible {
            outline: 3px solid rgba(230, 162, 118, 0.9);
            outline-offset: 3px;
        }

        .aisitex-button-primary {
            background: var(--aisitex-orange);
            color: var(--aisitex-white);
        }

        .aisitex-button-primary:hover {
            background: var(--aisitex-orange-dark);
        }

        .aisitex-button-secondary {
            border-color: rgba(255, 254, 250, 0.32);
            color: var(--aisitex-white);
        }

        .aisitex-button-secondary:hover {
            border-color: rgba(255, 254, 250, 0.72);
            background: rgba(255, 254, 250, 0.08);
        }

        .aisitex-button-icon {
            display: inline-flex;
            width: 17px;
            height: 17px;
            align-items: center;
            justify-content: center;
        }

        .aisitex-button-icon svg,
        .aisitex-task-link-icon svg,
        .aisitex-device-arrow svg {
            width: 100%;
            height: 100%;
            fill: none;
            stroke: currentColor;
            stroke-linecap: round;
            stroke-linejoin: round;
            stroke-width: 1.8;
        }

        .aisitex-hero-note {
            margin: 28px 0 0;
            color: rgba(255, 254, 250, 0.47);
            font-size: 12px;
        }

        .aisitex-interface-column {
            min-width: 0;
        }

        .aisitex-interface-shell {
            overflow: hidden;
            border: 1px solid rgba(255, 254, 250, 0.22);
            background: var(--aisitex-surface);
            color: var(--aisitex-text);
            box-shadow: 18px 22px 0 rgba(8, 29, 32, 0.18);
        }

        .aisitex-window-bar {
            min-height: 48px;
            padding: 0 18px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            border-bottom: 1px solid var(--aisitex-border);
            background: #f0eee8;
        }

        .aisitex-window-dots {
            display: flex;
            gap: 6px;
        }

        .aisitex-window-dot {
            display: block;
            width: 7px;
            height: 7px;
            border: 1px solid #aeb5af;
            border-radius: 50%;
        }

        .aisitex-window-label {
            color: var(--aisitex-neutral);
            font-family: Inter, Arial, sans-serif;
            font-size: 10px;
            font-weight: 700;
            letter-spacing: 0.12em;
            text-transform: uppercase;
        }

        .aisitex-interface-body {
            min-height: 370px;
            padding: clamp(24px, 4vw, 42px);
            display: grid;
            grid-template-columns: minmax(160px, 0.75fr) minmax(250px, 1.25fr);
            gap: clamp(26px, 4vw, 54px);
        }

        .aisitex-interface-overview {
            min-width: 0;
        }

        .aisitex-interface-kicker {
            margin: 0 0 11px;
            color: var(--aisitex-orange-dark);
            font-family: Inter, Arial, sans-serif;
            font-size: 10px;
            font-weight: 800;
            letter-spacing: 0.14em;
            text-transform: uppercase;
        }

        .aisitex-interface-heading {
            margin: 0;
            color: var(--aisitex-petrol-deep);
            font-size: clamp(22px, 2.7vw, 30px);
            font-weight: 700;
            line-height: 1.3;
        }

        .aisitex-interface-summary {
            margin: 12px 0 28px;
            color: var(--aisitex-muted);
            font-size: 13px;
            line-height: 1.7;
        }

        .aisitex-interface-list {
            margin: 0;
            border-top: 1px solid var(--aisitex-border);
        }

        .aisitex-interface-row {
            padding: 12px 0;
            display: grid;
            gap: 2px;
            border-bottom: 1px solid var(--aisitex-border);
        }

        .aisitex-interface-label {
            color: var(--aisitex-neutral);
            font-family: Inter, Arial, sans-serif;
            font-size: 9px;
            font-weight: 700;
            letter-spacing: 0.08em;
            text-transform: uppercase;
        }

        .aisitex-interface-value {
            color: var(--aisitex-text);
            font-size: 13px;
            font-weight: 600;
        }

        .aisitex-interface-stage {
            min-width: 0;
            padding: clamp(22px, 3vw, 32px);
            border: 1px solid #b9c2ba;
            background: #f7f6f1;
        }

        .aisitex-stage-topline {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
        }

        .aisitex-stage-label {
            color: var(--aisitex-neutral);
            font-family: Inter, Arial, sans-serif;
            font-size: 10px;
            font-weight: 700;
            letter-spacing: 0.13em;
            text-transform: uppercase;
        }

        .aisitex-stage-status {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--aisitex-amber);
            font-size: 11px;
            font-weight: 700;
            white-space: nowrap;
        }

        .aisitex-stage-status::before {
            display: block;
            width: 7px;
            height: 7px;
            border: 1px solid currentColor;
            border-radius: 50%;
            content: "";
        }

        .aisitex-stage-title {
            margin: 26px 0 8px;
            color: var(--aisitex-petrol-deep);
            font-size: clamp(20px, 2.5vw, 27px);
            font-weight: 700;
            line-height: 1.35;
        }

        .aisitex-stage-copy {
            max-width: 340px;
            margin: 0;
            color: var(--aisitex-muted);
            font-size: 13px;
            line-height: 1.75;
        }

        .aisitex-stage-options {
            display: grid;
            grid-template-columns: repeat(3, minmax(0, 1fr));
            gap: 8px;
            margin-top: 28px;
        }

        .aisitex-stage-option {
            min-height: 88px;
            padding: 12px 10px;
            border: 1px solid var(--aisitex-border);
            background: var(--aisitex-white);
        }

        .aisitex-stage-option-line {
            display: flex;
            align-items: center;
            gap: 7px;
            margin-bottom: 15px;
        }

        .aisitex-stage-option-icon {
            display: block;
            width: 8px;
            height: 8px;
            border: 1px solid var(--aisitex-petrol);
            border-radius: 50%;
        }

        .aisitex-stage-option-text {
            color: var(--aisitex-petrol);
            font-family: Inter, Arial, sans-serif;
            font-size: 9px;
            font-weight: 700;
            letter-spacing: 0.08em;
            text-transform: uppercase;
        }

        .aisitex-stage-option-label {
            display: block;
            color: var(--aisitex-text);
            font-size: 12px;
            font-weight: 700;
            line-height: 1.45;
        }

        .aisitex-stage-option-desc {
            display: block;
            margin-top: 4px;
            color: var(--aisitex-neutral);
            font-size: 11px;
            line-height: 1.45;
        }

        .aisitex-stage-rule {
            height: 1px;
            margin: 24px 0 16px;
            background: var(--aisitex-border);
        }

        .aisitex-stage-foot {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 15px;
            color: var(--aisitex-neutral);
            font-size: 11px;
        }

        .aisitex-stage-foot strong {
            color: var(--aisitex-petrol);
            font-weight: 700;
        }

        .aisitex-device-strip {
            background: var(--aisitex-petrol-dark);
            color: var(--aisitex-white);
        }

        .aisitex-device-inner {
            width: min(1180px, calc(100% - 48px));
            margin: 0 auto;
            padding: 34px 0 38px;
        }

        .aisitex-strip-heading {
            display: flex;
            align-items: end;
            justify-content: space-between;
            gap: 28px;
            margin-bottom: 20px;
        }

        .aisitex-strip-kicker {
            margin: 0 0 5px;
            color: #e6a276;
            font-family: Inter, Arial, sans-serif;
            font-size: 10px;
            font-weight: 700;
            letter-spacing: 0.15em;
            text-transform: uppercase;
        }

        .aisitex-strip-title {
            margin: 0;
            color: var(--aisitex-white);
            font-size: 22px;
            font-weight: 700;
            line-height: 1.35;
        }

        .aisitex-device-rail {
            display: grid;
            grid-template-columns: repeat(3, minmax(0, 1fr));
            border-top: 1px solid rgba(255, 254, 250, 0.2);
            border-bottom: 1px solid rgba(255, 254, 250, 0.2);
        }

        .aisitex-device-item {
            position: relative;
            min-width: 0;
            min-height: 142px;
            padding: 19px 22px 17px;
            border: 0;
            border-right: 1px solid rgba(255, 254, 250, 0.2);
            background: transparent;
            color: var(--aisitex-white);
            text-align: left;
            cursor: pointer;
            transition: background-color 160ms ease;
        }

        .aisitex-device-item:last-child {
            border-right: 0;
        }

        .aisitex-device-item::before {
            position: absolute;
            right: 0;
            bottom: -1px;
            left: 0;
            height: 3px;
            background: var(--aisitex-orange);
            content: "";
            transform: scaleX(0);
            transform-origin: left;
            transition: transform 160ms ease;
        }

        .aisitex-device-item:hover,
        .aisitex-device-item[aria-selected="true"] {
            background: rgba(255, 254, 250, 0.07);
        }

        .aisitex-device-item[aria-selected="true"]::before {
            transform: scaleX(1);
        }

        .aisitex-device-item-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
        }

        .aisitex-device-label {
            font-size: 15px;
            font-weight: 700;
        }

        .aisitex-device-state {
            color: #e6a276;
            font-family: Inter, Arial, sans-serif;
            font-size: 10px;
            font-weight: 700;
            letter-spacing: 0.08em;
            text-transform: uppercase;
        }

        .aisitex-device-condition {
            display: block;
            min-height: 44px;
            margin-top: 14px;
            color: rgba(255, 254, 250, 0.68);
            font-size: 12px;
            line-height: 1.65;
        }

        .aisitex-device-action {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            margin-top: 10px;
            color: var(--aisitex-white);
            font-size: 12px;
            font-weight: 700;
        }

        .aisitex-device-arrow {
            display: inline-flex;
            width: 15px;
            height: 15px;
            color: var(--aisitex-orange);
        }

        .aisitex-task-section {
            background: var(--aisitex-page);
        }

        .aisitex-section-inner {
            width: min(1180px, calc(100% - 48px));
            margin: 0 auto;
            padding: 82px 0 92px;
        }

        .aisitex-section-heading {
            max-width: 690px;
            margin-bottom: 38px;
        }

        .aisitex-section-kicker {
            margin: 0 0 10px;
            color: var(--aisitex-orange-dark);
            font-family: Inter, Arial, sans-serif;
            font-size: 10px;
            font-weight: 800;
            letter-spacing: 0.15em;
            text-transform: uppercase;
        }

        .aisitex-section-title {
            margin: 0;
            color: var(--aisitex-petrol-deep);
            font-size: clamp(30px, 4vw, 46px);
            font-weight: 700;
            letter-spacing: 0;
            line-height: 1.2;
        }

        .aisitex-section-summary {
            max-width: 610px;
            margin: 16px 0 0;
            color: var(--aisitex-muted);
            font-size: 15px;
            line-height: 1.85;
        }

        .aisitex-task-list {
            border-top: 1px solid var(--aisitex-border);
        }

        .aisitex-task-band {
            display: grid;
            grid-template-columns: 92px minmax(190px, 0.7fr) minmax(260px, 1fr) minmax(170px, 0.55fr);
            align-items: center;
            gap: 30px;
            min-height: 176px;
            padding: 28px 24px;
            border-bottom: 1px solid var(--aisitex-border);
            background: var(--aisitex-surface);
        }

        .aisitex-task-band-download {
            border-left: 5px solid var(--aisitex-orange);
        }

        .aisitex-task-band-account {
            border-left: 5px solid var(--aisitex-petrol);
        }

        .aisitex-task-index {
            color: var(--aisitex-orange-dark);
            font-family: Inter, Arial, sans-serif;
            font-size: 13px;
            font-weight: 800;
            letter-spacing: 0.12em;
        }

        .aisitex-task-label {
            margin: 0 0 8px;
            color: var(--aisitex-neutral);
            font-family: Inter, Arial, sans-serif;
            font-size: 10px;
            font-weight: 800;
            letter-spacing: 0.13em;
            text-transform: uppercase;
        }

        .aisitex-task-question {
            margin: 0;
            color: var(--aisitex-petrol-deep);
            font-size: 22px;
            font-weight: 700;
            line-height: 1.4;
        }

        .aisitex-task-answer {
            max-width: 380px;
            margin: 0;
            color: var(--aisitex-muted);
            font-size: 14px;
            line-height: 1.8;
        }

        .aisitex-task-link {
            display: inline-flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            min-height: 46px;
            padding: 0 0 0 15px;
            border-left: 1px solid var(--aisitex-border);
            color: var(--aisitex-petrol-deep);
            font-size: 13px;
            font-weight: 700;
            transition: color 160ms ease, padding 160ms ease;
        }

        .aisitex-task-link:hover,
        .aisitex-task-link:focus-visible {
            padding-left: 21px;
            color: var(--aisitex-orange-dark);
        }

        .aisitex-task-link-icon {
            display: inline-flex;
            width: 18px;
            height: 18px;
            flex: 0 0 auto;
            color: var(--aisitex-orange);
        }

        .aisitex-footer {
            background: var(--aisitex-petrol-deep);
            color: var(--aisitex-white);
        }

        .aisitex-footer-inner {
            width: min(1180px, calc(100% - 48px));
            min-height: 110px;
            margin: 0 auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 30px;
        }

        .aisitex-footer-brand {
            font-size: 14px;
            font-weight: 700;
            letter-spacing: 0.06em;
        }

        .aisitex-footer-meta {
            color: rgba(255, 254, 250, 0.56);
            font-size: 12px;
        }

        .aisitex-footer-rule {
            width: 1px;
            height: 17px;
            background: rgba(255, 254, 250, 0.28);
        }

        @media (max-width: 980px) {
            .aisitex-hero-inner {
                grid-template-columns: minmax(260px, 0.85fr) minmax(420px, 1.15fr);
                gap: 42px;
            }

            .aisitex-interface-body {
                grid-template-columns: 1fr;
                gap: 26px;
            }

            .aisitex-interface-overview {
                display: grid;
                grid-template-columns: 1fr 1fr;
                column-gap: 26px;
            }

            .aisitex-interface-kicker,
            .aisitex-interface-heading,
            .aisitex-interface-summary {
                grid-column: 1;
            }

            .aisitex-interface-list {
                grid-column: 2;
                grid-row: 1 / span 3;
                align-self: end;
                margin-top: 0;
            }

            .aisitex-interface-summary {
                margin-bottom: 0;
            }

            .aisitex-task-band {
                grid-template-columns: 58px minmax(170px, 0.8fr) minmax(220px, 1fr);
                gap: 22px;
            }

            .aisitex-task-link {
                grid-column: 2 / -1;
                border-left: 0;
                border-top: 1px solid var(--aisitex-border);
                padding: 16px 0 0;
            }

            .aisitex-task-link:hover,
            .aisitex-task-link:focus-visible {
                padding-left: 4px;
            }
        }

        @media (max-width: 780px) {
            .aisitex-header-inner,
            .aisitex-hero-inner,
            .aisitex-device-inner,
            .aisitex-section-inner,
            .aisitex-footer-inner {
                width: min(100% - 40px, 620px);
            }

            .aisitex-header-inner {
                min-height: 72px;
            }

            .aisitex-nav-toggle {
                display: block;
            }

            .aisitex-nav {
                position: absolute;
                top: 100%;
                right: 20px;
                left: 20px;
                display: grid;
                gap: 0;
                border: 1px solid rgba(255, 254, 250, 0.2);
                background: var(--aisitex-petrol-deep);
                box-shadow: 0 12px 22px rgba(8, 29, 32, 0.22);
            }

            .aisitex-nav[hidden] {
                display: none;
            }

            .aisitex-nav-link {
                min-height: 50px;
                padding: 0 17px;
                border-bottom: 1px solid rgba(255, 254, 250, 0.12);
            }

            .aisitex-nav-link:last-child {
                border-bottom: 0;
            }

            .aisitex-nav-link::after {
                right: auto;
                bottom: 0;
                left: 0;
                width: 3px;
                height: 100%;
                transform: scaleY(0);
                transform-origin: bottom;
            }

            .aisitex-nav-link:hover::after,
            .aisitex-nav-link:focus-visible::after,
            .aisitex-nav-link.active::after {
                transform: scaleY(1);
            }

            .aisitex-hero-inner {
                padding: 56px 0 54px;
                grid-template-columns: 1fr;
                gap: 45px;
            }

            .aisitex-hero-copy {
                max-width: 560px;
            }

            .aisitex-hero-title {
                max-width: 500px;
            }

            .aisitex-hero-lede {
                max-width: 520px;
            }

            .aisitex-interface-shell {
                box-shadow: 10px 14px 0 rgba(8, 29, 32, 0.18);
            }

            .aisitex-device-rail {
                display: flex;
                overflow-x: auto;
                scroll-snap-type: x mandatory;
            }

            .aisitex-device-item {
                min-width: 264px;
                flex: 0 0 78%;
                scroll-snap-align: start;
            }

            .aisitex-task-band {
                grid-template-columns: 46px 1fr;
                gap: 17px 20px;
                padding: 25px 20px;
            }

            .aisitex-task-content {
                grid-column: 2;
            }

            .aisitex-task-answer {
                margin-top: 12px;
            }

            .aisitex-task-link {
                grid-column: 2;
            }

            .aisitex-footer-inner {
                min-height: 96px;
                align-items: flex-start;
                flex-direction: column;
                justify-content: center;
                gap: 7px;
            }

            .aisitex-footer-rule {
                display: none;
            }
        }

        @media (max-width: 520px) {
            .aisitex-header-inner,
            .aisitex-hero-inner,
            .aisitex-device-inner,
            .aisitex-section-inner,
            .aisitex-footer-inner {
                width: calc(100% - 40px);
            }

            .aisitex-brand-caption {
                display: none;
            }

            .aisitex-hero-title {
                font-size: 39px;
            }

            .aisitex-hero-actions {
                align-items: stretch;
                flex-direction: column;
            }

            .aisitex-button {
                width: 100%;
            }

            .aisitex-interface-body {
                padding: 22px 18px 24px;
            }

            .aisitex-interface-overview {
                display: block;
            }

            .aisitex-interface-summary {
                margin-bottom: 20px;
            }

            .aisitex-interface-list {
                margin-top: 20px;
            }

            .aisitex-stage-options {
                grid-template-columns: 1fr;
            }

            .aisitex-stage-option {
                min-height: auto;
            }

            .aisitex-stage-option-line {
                margin-bottom: 8px;
            }

            .aisitex-stage-foot {
                align-items: flex-start;
                flex-direction: column;
                gap: 5px;
            }

            .aisitex-strip-heading {
                display: block;
            }

            .aisitex-strip-title {
                font-size: 20px;
            }

            .aisitex-device-inner {
                padding: 30px 0 34px;
            }

            .aisitex-section-inner {
                padding: 62px 0 70px;
            }

            .aisitex-section-title {
                font-size: 32px;
            }
        }

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

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

.aisitex-site-header {
    font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
    line-height: 1.6;
    color: #172326;
}

.aisitex-site-header, .aisitex-site-header *{
            box-sizing: border-box;
        }

.aisitex-site-header a{
            color: inherit;
            text-decoration: none;
        }

.aisitex-site-header button, .aisitex-site-header a{
            -webkit-tap-highlight-color: transparent;
        }

.aisitex-site-header button{
            font: inherit;
        }

.aisitex-site-header{
            position: relative;
            z-index: 10;
            background: #173f43;
            color: #fffefa;
        }

.aisitex-site-header .aisitex-header-inner{
            width: min(1180px, calc(100% - 48px));
            min-height: 82px;
            margin: 0 auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 28px;
        }

.aisitex-site-header .aisitex-brand{
            display: inline-flex;
            align-items: center;
            gap: 12px;
            min-width: 0;
        }

.aisitex-site-header .aisitex-brand-mark{
            display: grid;
            width: 36px;
            height: 36px;
            place-items: center;
            border: 1px solid rgba(255, 254, 250, 0.56);
            color: #fffefa;
            font-family: Inter, Arial, sans-serif;
            font-size: 13px;
            font-weight: 800;
            letter-spacing: 0.06em;
        }

.aisitex-site-header .aisitex-brand-copy{
            display: grid;
            gap: 0;
        }

.aisitex-site-header .aisitex-brand-name{
            font-size: 17px;
            font-weight: 700;
            line-height: 1.25;
            letter-spacing: 0.04em;
        }

.aisitex-site-header .aisitex-brand-caption{
            color: rgba(255, 254, 250, 0.62);
            font-family: Inter, Arial, sans-serif;
            font-size: 9px;
            line-height: 1.3;
            letter-spacing: 0.18em;
            text-transform: uppercase;
        }

.aisitex-site-header .aisitex-nav{
            display: flex;
            align-items: center;
            gap: 8px;
        }

.aisitex-site-header .aisitex-nav-link{
            position: relative;
            display: inline-flex;
            align-items: center;
            min-height: 42px;
            padding: 0 14px;
            color: rgba(255, 254, 250, 0.72);
            font-size: 14px;
            white-space: nowrap;
            transition: color 160ms ease;
        }

.aisitex-site-header .aisitex-nav-link::after{
            position: absolute;
            right: 14px;
            bottom: 4px;
            left: 14px;
            height: 2px;
            background: #d96b32;
            content: "";
            transform: scaleX(0);
            transform-origin: left;
            transition: transform 160ms ease;
        }

.aisitex-site-header .aisitex-nav-link:hover, .aisitex-site-header .aisitex-nav-link:focus-visible, .aisitex-site-header .aisitex-nav-link.active{
            color: #fffefa;
        }

.aisitex-site-header .aisitex-nav-link:hover::after, .aisitex-site-header .aisitex-nav-link:focus-visible::after, .aisitex-site-header .aisitex-nav-link.active::after{
            transform: scaleX(1);
        }

.aisitex-site-header .aisitex-nav-toggle{
            display: none;
            width: 44px;
            height: 44px;
            padding: 0;
            border: 1px solid rgba(255, 254, 250, 0.28);
            background: transparent;
            color: #fffefa;
            cursor: pointer;
        }

.aisitex-site-header .aisitex-nav-toggle-icon, .aisitex-site-header .aisitex-nav-toggle-icon::before, .aisitex-site-header .aisitex-nav-toggle-icon::after{
            display: block;
            width: 18px;
            height: 1px;
            margin: 0 auto;
            background: currentColor;
            content: "";
            transition: transform 160ms ease;
        }

.aisitex-site-header .aisitex-nav-toggle-icon::before{
            transform: translateY(-6px);
        }

.aisitex-site-header .aisitex-nav-toggle-icon::after{
            transform: translateY(5px);
        }

.aisitex-site-header .aisitex-nav-toggle[aria-expanded="true"] .aisitex-nav-toggle-icon{
            background: transparent;
        }

.aisitex-site-header .aisitex-nav-toggle[aria-expanded="true"] .aisitex-nav-toggle-icon::before{
            transform: translateY(0) rotate(45deg);
        }

.aisitex-site-header .aisitex-nav-toggle[aria-expanded="true"] .aisitex-nav-toggle-icon::after{
            transform: translateY(-1px) rotate(-45deg);
        }

.aisitex-site-header .aisitex-nav-toggle:focus-visible{
            outline: 3px solid rgba(230, 162, 118, 0.9);
            outline-offset: 3px;
        }

@media (max-width: 780px){.aisitex-site-header .aisitex-header-inner{
                width: min(100% - 40px, 620px);
            }

.aisitex-site-header .aisitex-header-inner{
                min-height: 72px;
            }

.aisitex-site-header .aisitex-nav-toggle{
                display: block;
            }

.aisitex-site-header .aisitex-nav{
                position: absolute;
                top: 100%;
                right: 20px;
                left: 20px;
                display: grid;
                gap: 0;
                border: 1px solid rgba(255, 254, 250, 0.2);
                background: #173f43;
                box-shadow: 0 12px 22px rgba(8, 29, 32, 0.22);
            }

.aisitex-site-header .aisitex-nav[hidden]{
                display: none;
            }

.aisitex-site-header .aisitex-nav-link{
                min-height: 50px;
                padding: 0 17px;
                border-bottom: 1px solid rgba(255, 254, 250, 0.12);
            }

.aisitex-site-header .aisitex-nav-link:last-child{
                border-bottom: 0;
            }

.aisitex-site-header .aisitex-nav-link::after{
                right: auto;
                bottom: 0;
                left: 0;
                width: 3px;
                height: 100%;
                transform: scaleY(0);
                transform-origin: bottom;
            }

.aisitex-site-header .aisitex-nav-link:hover::after, .aisitex-site-header .aisitex-nav-link:focus-visible::after, .aisitex-site-header .aisitex-nav-link.active::after{
                transform: scaleY(1);
            }}

@media (max-width: 520px){.aisitex-site-header .aisitex-header-inner{
                width: calc(100% - 40px);
            }

.aisitex-site-header .aisitex-brand-caption{
                display: none;
            }}

@media (prefers-reduced-motion: reduce){.aisitex-site-header, .aisitex-site-header *, .aisitex-site-header::before, .aisitex-site-header *::before, .aisitex-site-header::after, .aisitex-site-header *::after{
                animation-duration: 0.01ms !important;
                animation-iteration-count: 1 !important;
                scroll-behavior: auto !important;
                transition-duration: 0.01ms !important;
            }}

.aisitex-footer {
    font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
    line-height: 1.6;
    color: #172326;
}

.aisitex-footer, .aisitex-footer *{
            box-sizing: border-box;
        }

.aisitex-footer{
            background: #173f43;
            color: #fffefa;
        }

.aisitex-footer .aisitex-footer-inner{
            width: min(1180px, calc(100% - 48px));
            min-height: 110px;
            margin: 0 auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 30px;
        }

.aisitex-footer .aisitex-footer-brand{
            font-size: 14px;
            font-weight: 700;
            letter-spacing: 0.06em;
        }

.aisitex-footer .aisitex-footer-meta{
            color: rgba(255, 254, 250, 0.56);
            font-size: 12px;
        }

@media (max-width: 780px){.aisitex-footer .aisitex-footer-inner{
                width: min(100% - 40px, 620px);
            }

.aisitex-footer .aisitex-footer-inner{
                min-height: 96px;
                align-items: flex-start;
                flex-direction: column;
                justify-content: center;
                gap: 7px;
            }}

@media (max-width: 520px){.aisitex-footer .aisitex-footer-inner{
                width: calc(100% - 40px);
            }}

@media (prefers-reduced-motion: reduce){.aisitex-footer, .aisitex-footer *, .aisitex-footer::before, .aisitex-footer *::before, .aisitex-footer::after, .aisitex-footer *::after{
                animation-duration: 0.01ms !important;
                animation-iteration-count: 1 !important;
                scroll-behavior: auto !important;
                transition-duration: 0.01ms !important;
            }}


/* Unified dark official visual system */
:root {
  color-scheme: dark;
  --aisitex-dark-bg: #0b1118;
  --aisitex-dark-surface: #111a24;
  --aisitex-dark-surface-raised: #172331;
  --aisitex-dark-line: #283544;
  --aisitex-dark-text: #e6edf3;
  --aisitex-dark-muted: #9aa8b7;
  --aisitex-dark-blue: #2563eb;
  --aisitex-dark-blue-hover: #3b82f6;
}
html, body {
  background: var(--aisitex-dark-bg) !important;
  color: var(--aisitex-dark-text) !important;
}
body {
  -webkit-font-smoothing: antialiased;
}
header, footer, nav,
[class*="site-header"], [class*="header-shell"], [class*="nav-shell"], [class*="header-inner"] {
  background-color: #0d141d !important;
  color: var(--aisitex-dark-text) !important;
  border-color: var(--aisitex-dark-line) !important;
}
main, section, article, aside, form, details, fieldset {
  border-color: var(--aisitex-dark-line) !important;
}
[class*="hero"], [class*="section"], [class*="card"], [class*="panel"],
[class*="strip"], [class*="shell"], [class*="route"], [class*="feature"],
[class*="step"], [class*="support"], [class*="content"], [class*="table"],
[class*="choice"], [class*="map"], [class*="result"], [class*="intro"],
[class*="closing"], [class*="next"], [class*="task"], [class*="path"],
[class*="comparison"], [class*="flow"], [class*="evidence"] {
  background-color: var(--aisitex-dark-surface) !important;
  color: var(--aisitex-dark-text) !important;
  border-color: var(--aisitex-dark-line) !important;
}
h1, h2, h3, h4, h5, h6 {
  color: #f5f7fa !important;
}
p, li, label, summary, dt, dd {
  color: #c8d1dc;
}
[class*="muted"], [class*="meta"], [class*="caption"], [class*="description"],
[class*="lead"], [class*="copy"], [class*="eyebrow"], [class*="kicker"], [class*="note"] {
  color: var(--aisitex-dark-muted) !important;
}
a {
  color: #bfdbfe;
}
main a:not([class*="primary"]):not([class*="submit"]):not([class*="cta"]):not([class*="button"]) {
  color: #93c5fd;
}
input, textarea, select {
  background: #0f1720 !important;
  color: #f3f4f6 !important;
  border-color: #334155 !important;
}
input::placeholder, textarea::placeholder {
  color: #718096 !important;
}
a[class*="primary"], button[class*="primary"],
[class*="submit"], [class*="cta"], .aisitex-register-cta {
  background: var(--aisitex-dark-blue) !important;
  color: #ffffff !important;
  border-color: var(--aisitex-dark-blue-hover) !important;
  box-shadow: 0 10px 24px rgba(37, 99, 235, .28) !important;
}
a[class*="primary"]:hover, button[class*="primary"]:hover,
[class*="submit"]:hover, [class*="cta"]:hover, .aisitex-register-cta:hover,
a[class*="primary"]:focus-visible, button[class*="primary"]:focus-visible,
[class*="submit"]:focus-visible, [class*="cta"]:focus-visible, .aisitex-register-cta:focus-visible {
  background: var(--aisitex-dark-blue-hover) !important;
}
a[class*="secondary"], button[class*="secondary"], [class*="ghost"], [class*="quiet"],
[class*="text-link"], [class*="secondary-link"] {
  background: var(--aisitex-dark-surface-raised) !important;
  color: #dbeafe !important;
  border-color: #3a4a5d !important;
}
button:not([class*="toggle"]):not([class*="menu"]):not([class*="nav"]):not([class*="visibility"]) {
  border-color: var(--aisitex-dark-line);
  color: #dbeafe;
}
hr {
  border-color: var(--aisitex-dark-line) !important;
}


/* Prominent registration entry point */
.aisitex-register-cta {
  display: inline-flex !important;
  align-items: center;
  justify-content: center;
  gap: .55rem;
  min-height: 48px;
  padding: .8rem 1.35rem !important;
  border-radius: 8px;
  background: #2563eb !important;
  border: 1px solid #3b82f6 !important;
  color: #fff !important;
  font-weight: 700;
  box-shadow: 0 10px 24px rgba(37, 99, 235, .28) !important;
  text-decoration: none !important;
}
.aisitex-register-cta:hover,
.aisitex-register-cta:focus-visible {
  background: #3b82f6 !important;
  color: #fff !important;
  transform: translateY(-1px);
}
/* Navigation registration control sizing */
.aisitex-nav .aisitex-nav-register,.aisitex-main-nav .aisitex-nav-register,.aisitex-primary-nav .aisitex-nav-register,.aisitex-primary-menu .aisitex-nav-register{display:inline-flex!important;align-items:center;justify-content:center;min-height:38px!important;padding:7px 13px!important;border-radius:6px!important;font-size:14px!important;line-height:1.2!important;white-space:nowrap}
/* Shared official dark palette and accessible registration controls */
:root{color-scheme:dark;--aisitex-dark-bg:#0b1118;--aisitex-dark-surface:#111a24;--aisitex-dark-raised:#172331;--aisitex-dark-line:#283544;--aisitex-dark-text:#e6edf3;--aisitex-dark-muted:#9aa8b7;--aisitex-dark-blue:#2563eb;--aisitex-dark-blue-hover:#3b82f6}
html,body{background:#0b1118!important;color:#e6edf3!important}
header,footer,nav,[class*="site-header"],[class*="nav-shell"],[class*="header-shell"],[class*="header-inner"]{background:#0d141d!important;color:#e6edf3!important;border-color:#283544!important}
main,section,article,aside,form,details,fieldset,[class*="hero"],[class*="section"],[class*="card"],[class*="panel"],[class*="strip"],[class*="route"],[class*="feature"],[class*="step"],[class*="support"],[class*="content"],[class*="choice"],[class*="map"],[class*="result"],[class*="intro"],[class*="closing"],[class*="next"],[class*="task"],[class*="path"],[class*="comparison"],[class*="flow"],[class*="evidence"],[class*="frame"],[class*="visual"],[class*="shot"]{background-color:#111a24!important;color:#e6edf3!important;border-color:#283544!important}
h1,h2,h3,h4,h5,h6{color:#f5f7fa!important}p,li,label,summary,dt,dd{color:#c8d1dc}[class*="muted"],[class*="description"],[class*="lead"],[class*="copy"],[class*="note"],[class*="caption"]{color:#9aa8b7!important}
input,textarea,select{background:#0f1720!important;color:#f3f4f6!important;border-color:#334155!important}input::placeholder,textarea::placeholder{color:#718096!important}
a[class*="primary"],button[class*="primary"],[class*="submit"],[class*="cta"],.aisitex-register-cta{background:#2563eb!important;color:#fff!important;border-color:#3b82f6!important;box-shadow:0 10px 24px #2563eb47!important}
a[class*="primary"]:hover,button[class*="primary"]:hover,[class*="submit"]:hover,[class*="cta"]:hover,.aisitex-register-cta:hover{background:#3b82f6!important}
a[class*="secondary"],button[class*="secondary"],[class*="ghost"],[class*="quiet"],[class*="text-link"],[class*="secondary-link"]{background:#172331!important;color:#dbeafe!important;border-color:#3a4a5d!important}
.aisitex-nav-register{display:inline-flex!important;align-items:center;justify-content:center;min-height:38px!important;padding:7px 13px!important;border-radius:6px!important;font-size:14px!important;line-height:1.2!important;white-space:nowrap;color:#dbeafe!important;background:#172331!important;border:1px solid #3a4a5d}.aisitex-nav-register:hover,.aisitex-nav-register.active{background:#2563eb!important;color:#fff!important}
.aisitex-register-cta{display:inline-flex!important;align-items:center;justify-content:center;min-height:48px;padding:12px 22px!important;border-radius:7px;font-weight:750;text-decoration:none!important}