:root {
    --ink: #111318;
    --ink-2: #2b3138;
    --muted: #68717d;
    --quiet: #9aa2ad;
    --paper: #ffffff;
    --wash: #f5f7fa;
    --wash-blue: #f3f7fb;
    --surface: #ffffff;
    --blue: #4f6f91;
    --blue-deep: #314a67;
    --blue-soft: rgba(79, 111, 145, 0.10);
    --line: rgba(18, 24, 32, 0.12);
    --line-strong: rgba(18, 24, 32, 0.22);
    --radius: 8px;
    --sans: "Source Han Sans SC", "Noto Sans CJK SC", "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
    --serif: "Source Han Serif SC", "Noto Serif CJK SC", "Songti SC", STSong, SimSun, Georgia, serif;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    position: relative;
    margin: 0;
    min-height: 100vh;
    color: var(--ink);
    font-family: var(--sans);
    background:
        linear-gradient(90deg, rgba(79, 111, 145, 0.048) 1px, transparent 1px) 0 0 / 54px 54px,
        linear-gradient(0deg, rgba(79, 111, 145, 0.038) 1px, transparent 1px) 0 0 / 54px 54px,
        linear-gradient(145deg, #fbfcfb 0%, #f2f6f8 42%, #f8f9f3 100%);
    overflow-x: hidden;
}

body::before,
body::after {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
}

body::before {
    z-index: 0;
    background:
        linear-gradient(118deg, transparent 0 16%, rgba(79, 111, 145, 0.085) 16% 17.3%, transparent 17.3% 45%, rgba(79, 111, 145, 0.055) 45% 46.2%, transparent 46.2%),
        linear-gradient(242deg, transparent 0 42%, rgba(79, 111, 145, 0.060) 42% 43.4%, transparent 43.4% 78%, rgba(116, 145, 126, 0.050) 78% 79%, transparent 79%),
        repeating-linear-gradient(116deg, transparent 0 22px, rgba(17, 19, 24, 0.016) 22px 23px, transparent 23px 70px);
    opacity: 0.92;
    -webkit-mask-image: linear-gradient(90deg, rgba(0, 0, 0, 0.38), #000 18%, #000 82%, rgba(0, 0, 0, 0.42));
    mask-image: linear-gradient(90deg, rgba(0, 0, 0, 0.38), #000 18%, #000 82%, rgba(0, 0, 0, 0.42));
}

body::after {
    z-index: 0;
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.50), transparent 22%, transparent 76%, rgba(255, 255, 255, 0.62)),
        linear-gradient(90deg, rgba(255, 255, 255, 0.66), transparent 18%, transparent 82%, rgba(255, 255, 255, 0.72));
}

a {
    color: inherit;
}

button {
    font: inherit;
}

.skip-link {
    position: fixed;
    top: 12px;
    left: 12px;
    z-index: 100;
    padding: 10px 14px;
    border-radius: var(--radius);
    background: var(--ink);
    color: #fff;
    text-decoration: none;
    font-size: 13px;
    font-weight: 800;
    transform: translateY(-140%);
    transition: transform 160ms ease;
}

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

.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 60;
    width: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--blue-deep), var(--blue), #8aa0b8);
}

.topbar {
    position: sticky;
    top: 0;
    z-index: 50;
    min-height: 66px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    padding: 0 clamp(22px, 4vw, 52px);
    border-bottom: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.88);
    backdrop-filter: blur(20px);
}

.top-left {
    display: inline-flex;
    align-items: center;
    gap: clamp(18px, 3vw, 32px);
    min-width: 0;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: var(--ink);
    text-decoration: none;
    font-size: 15px;
    font-weight: 850;
    white-space: nowrap;
}

.brand::before {
    content: "";
    width: 15px;
    height: 15px;
    border: 2px solid var(--blue);
    border-radius: 4px;
    background:
        linear-gradient(90deg, transparent 45%, rgba(79, 111, 145, 0.18) 45% 55%, transparent 55%),
        linear-gradient(0deg, transparent 45%, rgba(79, 111, 145, 0.18) 45% 55%, transparent 55%);
}

.page-tabs {
    display: flex;
    align-items: center;
    gap: 4px;
    flex-wrap: wrap;
}

.page-tabs a,
.back,
.reading-rail a,
.condition-matrix button,
.module-switcher button {
    transition:
        color 170ms ease,
        background 170ms ease,
        border-color 170ms ease,
        transform 170ms ease;
}

.page-tabs a {
    min-height: 34px;
    display: inline-flex;
    align-items: center;
    padding: 0 12px;
    border-radius: 999px;
    color: var(--muted);
    text-decoration: none;
    font-size: 13px;
    font-weight: 750;
}

.page-tabs a:hover,
.page-tabs a.is-current {
    background: var(--wash-blue);
    color: var(--blue-deep);
}

.top-actions {
    display: inline-flex;
    align-items: center;
    gap: 16px;
    color: var(--muted);
    font-size: 13px;
    white-space: nowrap;
}

.back {
    min-height: 34px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0 13px;
    border: 1px solid var(--line);
    border-radius: 999px;
    background: #fff;
    color: var(--blue-deep);
    text-decoration: none;
    font-weight: 800;
}

.back:hover {
    border-color: rgba(79, 111, 145, 0.34);
    background: var(--wash-blue);
}

.intro-layout {
    position: relative;
    z-index: 1;
    width: min(1280px, calc(100% - 48px));
    display: grid;
    grid-template-columns: 236px minmax(0, 1fr);
    column-gap: clamp(34px, 5vw, 68px);
    row-gap: 0;
    margin: 0 auto;
}

.reading-rail {
    position: sticky;
    top: 90px;
    align-self: start;
    margin-top: 64px;
    padding: 0;
    border: 0;
    background: transparent;
}

.reading-rail nav {
    counter-reset: rail;
    display: grid;
    gap: 2px;
}

.reading-rail a {
    min-height: 38px;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 0 10px;
    border-radius: 7px;
    color: var(--muted);
    text-decoration: none;
    font-size: 13px;
    font-weight: 760;
}

.reading-rail a::before {
    counter-increment: rail;
    content: counter(rail, decimal-leading-zero);
    min-width: 23px;
    color: var(--quiet);
    font-family: Georgia, serif;
    font-size: 11px;
    font-weight: 700;
}

.reading-rail a:hover,
.reading-rail a.is-current {
    background: var(--wash-blue);
    color: var(--blue-deep);
}

main {
    min-width: 0;
    padding: 56px 0 92px;
    counter-reset: intro-section;
}

.section-shell {
    scroll-margin-top: 92px;
    margin-top: 92px;
}

.hero {
    min-height: calc(100vh - 132px);
    display: grid;
    align-items: center;
    margin-top: 0;
    padding: clamp(38px, 7vw, 92px) 0;
    border-bottom: 1px solid var(--line);
}

.hero-copy {
    max-width: 1040px;
}

.eyebrow {
    margin: 0 0 16px;
    color: var(--blue);
    font-size: 12px;
    font-weight: 850;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

h1,
h2,
h3,
p {
    margin: 0;
}

h1,
h2 {
    color: var(--ink);
    font-family: var(--serif);
    letter-spacing: 0;
}

h1 {
    max-width: 980px;
    font-size: clamp(48px, 6.8vw, 88px);
    line-height: 1.04;
    font-weight: 820;
}

.hero h2 {
    max-width: 920px;
    margin-top: 24px;
    color: var(--ink);
    font-size: clamp(27px, 3.2vw, 46px);
    line-height: 1.24;
    font-weight: 800;
}

h2 {
    font-size: clamp(30px, 3.2vw, 44px);
    line-height: 1.18;
    font-weight: 800;
}

h3 {
    color: var(--ink);
    font-size: 20px;
    line-height: 1.36;
}

p {
    color: var(--muted);
    font-size: 15px;
    line-height: 1.76;
}

.lead {
    max-width: 960px;
    margin-top: 24px;
    color: var(--ink-2);
    font-size: 18px;
    line-height: 1.92;
}

.hero .lead + .lead {
    margin-top: 14px;
}

.text-mark {
    color: var(--blue-deep);
    font-weight: 850;
}

.concept-strip {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    margin-top: 34px;
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
}

.concept-strip article {
    min-height: 122px;
    display: grid;
    align-content: center;
    gap: 10px;
    padding: 24px 22px;
    border-right: 1px solid var(--line);
}

.concept-strip article:last-child {
    border-right: 0;
}

.concept-strip span,
.architecture-guide span,
.map-column span {
    color: var(--blue);
    font-size: 12px;
    font-weight: 850;
    letter-spacing: 0.03em;
}

.concept-strip strong {
    color: var(--ink);
    font-size: 18px;
    line-height: 1.5;
}

.architecture-guide {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    border-bottom: 1px solid var(--line);
}

.architecture-guide article {
    min-height: 164px;
    display: grid;
    align-content: start;
    gap: 10px;
    padding: 28px 22px;
    border-right: 1px solid var(--line);
}

.architecture-guide article:last-child {
    border-right: 0;
}

.architecture-guide strong {
    color: var(--ink);
    font-size: 20px;
    line-height: 1.3;
}

.architecture-guide p {
    font-size: 14px;
    line-height: 1.72;
}

.section-head {
    position: relative;
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 36px;
    padding: 0 90px 22px 0;
    border-bottom: 1px solid var(--line);
}

main > .section-shell:not(.hero):not(.closing) .section-head::before {
    counter-increment: intro-section;
    content: counter(intro-section, decimal-leading-zero);
    position: absolute;
    right: 0;
    bottom: 12px;
    color: rgba(49, 74, 103, 0.15);
    font-family: Georgia, serif;
    font-size: clamp(42px, 6vw, 76px);
    font-weight: 700;
    line-height: 1;
}

.prose-card {
    display: grid;
    gap: 20px;
    max-width: 920px;
}

.prose-card p {
    color: var(--ink-2);
    font-size: 16px;
    line-height: 1.92;
}

.prose-card p:first-child {
    max-width: 820px;
    color: var(--ink);
    font-size: 18px;
    font-weight: 800;
}

.prose-card p:not(:first-child) {
    max-width: 860px;
}

.variable-map {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 54px minmax(0, 1fr) 54px minmax(0, 1.1fr);
    margin-top: 22px;
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
}

.map-column,
.map-operator {
    min-height: 142px;
    display: grid;
    align-content: center;
    padding: 24px;
    border-right: 1px solid var(--line);
}

.map-column.result {
    border-right: 0;
    background: var(--wash-blue);
}

.map-column {
    gap: 9px;
}

.map-column strong {
    color: var(--ink);
    font-family: var(--serif);
    font-size: 30px;
    line-height: 1.16;
}

.map-column p {
    color: var(--muted);
    font-size: 15px;
    line-height: 1.65;
}

.map-operator {
    place-items: center;
    color: var(--blue);
    font-family: Georgia, serif;
    font-size: 28px;
    font-weight: 700;
    padding: 0;
}

.condition-matrix {
    display: grid;
    grid-template-columns: minmax(160px, 0.9fr) repeat(3, minmax(0, 1fr));
    margin-top: 24px;
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
}

.condition-matrix > * {
    min-height: 72px;
    display: grid;
    place-items: center;
    padding: 16px;
    color: var(--ink);
    text-align: center;
}

.condition-matrix > *:nth-child(-n + 4) {
    border-bottom: 1px solid var(--line);
}

.matrix-corner,
.matrix-head,
.matrix-row-head {
    font-weight: 850;
}

.matrix-corner {
    background: var(--wash);
    color: var(--ink);
}

.matrix-head {
    background: var(--wash-blue);
    color: var(--blue-deep);
}

.matrix-row-head {
    justify-items: center;
    color: var(--blue-deep);
    font-family: var(--serif);
    font-size: 17px;
    letter-spacing: 0;
    text-align: center;
}

.condition-matrix button {
    width: 100%;
    height: 100%;
    border: 0;
    background: transparent;
    color: var(--blue-deep);
    cursor: pointer;
    font-family: Georgia, serif;
    font-size: 27px;
    font-weight: 700;
}

.condition-matrix button:hover,
.condition-matrix button.is-active {
    background: var(--wash-blue);
}

.matrix-empty {
    color: var(--quiet);
    font-family: Georgia, serif;
    font-size: 22px;
}

.treatment-grid {
    display: grid;
    grid-template-columns: 1fr;
    border-top: 1px solid var(--line);
}

.treatment-card {
    position: relative;
    display: grid;
    grid-template-columns: 88px minmax(0, 1fr);
    gap: 24px;
    padding: 28px 24px;
    border-bottom: 1px solid rgba(18, 24, 32, 0.08);
    border-radius: 18px;
    outline: none;
    transition: background 170ms ease, transform 170ms ease, box-shadow 170ms ease;
}

.treatment-card::before {
    content: attr(data-source) " · " attr(data-label);
    position: absolute;
    top: 26px;
    right: 0;
    color: var(--quiet);
    font-size: 12px;
    font-weight: 800;
}

.treatment-card:hover,
.treatment-card:focus-visible,
.treatment-card.is-active {
    transform: translateY(-2px);
    background: var(--wash-blue);
    box-shadow: 0 18px 44px rgba(49, 74, 103, 0.08);
}

.treatment-card strong {
    width: 62px;
    height: 62px;
    display: inline-grid;
    place-items: center;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    color: var(--blue-deep);
    font-family: Georgia, serif;
    font-size: 27px;
    font-weight: 700;
    line-height: 1;
}

.treatment-card p {
    padding-top: 22px;
    color: var(--ink-2);
    font-size: 16px;
    line-height: 1.92;
}

.module-explorer {
    display: grid;
    grid-template-columns: minmax(230px, 0.72fr) minmax(0, 1.65fr);
    gap: clamp(18px, 3vw, 42px);
    align-items: stretch;
    padding: clamp(10px, 1.8vw, 18px);
    border-radius: 30px;
    background:
        linear-gradient(135deg, rgba(246, 249, 252, 0.95), rgba(255, 255, 255, 0.85)),
        var(--wash-blue);
    box-shadow: inset 0 0 0 1px rgba(180, 194, 211, 0.42);
}

.module-index {
    display: grid;
    gap: 10px;
    align-content: start;
}

.module-index button {
    min-height: 76px;
    display: grid;
    grid-template-columns: 38px 1fr;
    gap: 14px;
    align-items: center;
    width: 100%;
    padding: 16px 18px;
    border: 0;
    border-radius: 20px;
    background: transparent;
    color: var(--muted);
    cursor: pointer;
    text-align: left;
    transition: background 180ms ease, color 180ms ease, transform 180ms ease, box-shadow 180ms ease;
}

.module-index button:hover {
    background: rgba(255, 255, 255, 0.62);
    color: var(--ink);
}

.module-index button:focus-visible {
    outline: 3px solid rgba(79, 111, 145, 0.24);
    outline-offset: 3px;
}

.module-index button.is-active {
    background: #fff;
    color: var(--blue-deep);
    transform: translateX(6px);
    box-shadow: 0 18px 38px rgba(50, 74, 102, 0.12);
}

.module-index span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border-radius: 999px;
    background: rgba(79, 111, 145, 0.1);
    color: var(--blue-deep);
    font-family: var(--serif);
    font-size: 15px;
    font-weight: 800;
}

.module-index strong {
    font-size: 15px;
    line-height: 1.28;
    letter-spacing: 0;
}

.module-stage {
    position: relative;
    display: grid;
    min-height: 460px;
    overflow: hidden;
    border-radius: 24px;
    background: #fff;
    box-shadow: 0 22px 60px rgba(54, 79, 109, 0.1);
}

.module-card {
    position: relative;
    grid-area: 1 / 1;
    display: grid;
    align-content: start;
    gap: 16px;
    padding: clamp(26px, 4vw, 46px);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(16px);
    transition: opacity 260ms ease, transform 260ms ease, visibility 260ms ease;
}

.module-card.is-active {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateY(0);
}

.module-card h3 {
    font-family: var(--serif);
    font-size: 29px;
    line-height: 1.18;
}

.module-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.module-tags span {
    min-height: 27px;
    display: inline-flex;
    align-items: center;
    padding: 5px 10px;
    border: 1px solid var(--line);
    border-radius: 999px;
    color: var(--blue-deep);
    font-size: 12px;
    font-weight: 850;
}

.module-card p {
    color: var(--ink-2);
    font-size: 15px;
    line-height: 1.82;
}

.question-carousel {
    position: relative;
    overflow: hidden;
    padding: 18px 0;
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    -webkit-mask-image: linear-gradient(90deg, transparent, #000 9%, #000 91%, transparent);
    mask-image: linear-gradient(90deg, transparent, #000 9%, #000 91%, transparent);
}

.question-track {
    display: flex;
    width: max-content;
    gap: 16px;
    animation: question-marquee 34s linear infinite;
}

.question-carousel:hover .question-track {
    animation-play-state: paused;
}

.question-card {
    flex: 0 0 clamp(260px, 29vw, 390px);
}

.question-card p {
    min-height: 150px;
    display: flex;
    align-items: center;
    padding: 24px;
    border: 1px solid rgba(18, 24, 32, 0.10);
    border-radius: 18px;
    background: var(--wash-blue);
    color: var(--ink-2);
    font-size: clamp(16px, 1.35vw, 19px);
    font-weight: 800;
    line-height: 1.72;
}

@keyframes question-marquee {
    from {
        transform: translateX(0);
    }

    to {
        transform: translateX(-50%);
    }
}

.closing {
    position: relative;
    z-index: 1;
    grid-column: 1 / -1;
    width: min(1160px, calc(100% - 72px));
    margin-top: 0;
    margin-right: auto;
    margin-left: auto;
    padding: clamp(46px, 6vw, 72px) clamp(30px, 6vw, 76px);
    transform: none;
    border-radius: 34px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    background:
        radial-gradient(circle at 86% 12%, rgba(120, 143, 169, 0.28), transparent 34%),
        linear-gradient(135deg, #11161d, #1d232b);
    box-shadow: 0 28px 70px rgba(18, 24, 32, 0.18);
}

.closing h2 {
    max-width: 900px;
    color: #fff;
    font-size: 42px;
}

.closing p:not(.eyebrow) {
    max-width: 980px;
    margin-top: 20px;
    color: rgba(255, 255, 255, 0.78);
    font-size: 16px;
    line-height: 1.9;
}

.closing .eyebrow {
    color: rgba(255, 255, 255, 0.58);
}

.reveal {
    opacity: 0;
    transform: translateY(18px);
    transition: opacity 540ms ease, transform 540ms ease;
}

.reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
}

@media (max-width: 1280px) {
    .topbar {
        padding-inline: 28px;
    }

    .intro-layout {
        grid-template-columns: 1fr;
    }

    .reading-rail {
        position: static;
        margin-top: 24px;
    }

    .reading-rail nav {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }

    main {
        padding-top: 36px;
    }

    .closing {
        width: min(100%, calc(100vw - 56px));
        margin-right: auto;
        margin-left: auto;
        transform: none;
    }
}

@media (max-width: 940px) {
    .topbar {
        align-items: flex-start;
        flex-direction: column;
        gap: 10px;
        padding-top: 12px;
        padding-bottom: 12px;
    }

    .top-left,
    .top-actions {
        align-items: flex-start;
        flex-direction: column;
        gap: 10px;
    }

    .top-actions {
        white-space: normal;
    }

    .page-tabs {
        max-width: 100%;
        justify-content: flex-start;
        overflow-x: auto;
    }

    .intro-layout {
        width: min(100% - 28px, 1280px);
    }

    .reading-rail nav {
        grid-template-columns: 1fr 1fr;
    }

    .section-shell {
        margin-top: 72px;
    }

    h1 {
        font-size: 42px;
    }

    .hero h2,
    .closing h2 {
        font-size: 30px;
    }

    .lead {
        font-size: 16px;
    }

    .section-head {
        display: block;
        padding-right: 0;
    }

    main > .section-shell:not(.hero):not(.closing) .section-head::before {
        display: none;
    }

    .concept-strip,
    .architecture-guide {
        grid-template-columns: 1fr;
    }

    .concept-strip article,
    .architecture-guide article {
        border-right: 0;
        border-bottom: 1px solid var(--line);
    }

    .module-explorer {
        grid-template-columns: 1fr;
        padding: 10px;
        border-radius: 24px;
    }

    .module-index {
        grid-template-columns: 1fr;
    }

    .module-index button {
        min-height: 64px;
        border-radius: 16px;
    }

    .module-index button.is-active {
        transform: translateY(0);
    }

    .module-stage {
        min-height: 610px;
        border-radius: 20px;
    }

    .module-card {
        padding: 24px;
    }

    .closing {
        width: 100%;
        margin-left: 0;
        transform: none;
        border-radius: 26px;
    }

    .variable-map {
        grid-template-columns: 1fr;
    }

    .map-column,
    .map-operator {
        border-right: 0;
        border-bottom: 1px solid var(--line);
    }

    .condition-matrix {
        display: block;
    }

    .condition-matrix > * {
        min-height: 58px;
    }

    .treatment-card {
        grid-template-columns: 1fr;
        padding-top: 50px;
    }

    .question-track {
        gap: 12px;
        animation-duration: 38s;
    }

    .question-card {
        flex-basis: min(76vw, 330px);
    }

    .question-card p {
        min-height: 132px;
        padding: 20px;
        font-size: 16px;
    }
}

/* Treatment cards use the same enter/leave emphasis model as guide step cards. */
#treatments .treatment-card {
    border: 1px solid transparent;
    border-bottom-color: rgba(18, 24, 32, 0.08);
    transition:
        background 180ms ease,
        border-color 180ms ease,
        box-shadow 180ms ease,
        transform 180ms ease;
}

#treatments .treatment-card:hover,
#treatments .treatment-card:focus-visible,
#treatments .treatment-card.is-active {
    transform: translateX(4px);
    border-color: rgba(255, 255, 255, 0.64);
    background:
        linear-gradient(90deg, rgba(32, 63, 101, 0.16) 0 5px, transparent 5px),
        linear-gradient(135deg, rgba(255, 255, 255, 0.68), rgba(255, 255, 255, 0.28));
    box-shadow:
        0 20px 56px rgba(17, 25, 35, 0.12),
        inset 0 1px 0 rgba(255, 255, 255, 0.72);
    backdrop-filter: blur(18px) saturate(1.16);
    outline: none;
}

#treatments .treatment-card:hover strong,
#treatments .treatment-card:focus-visible strong,
#treatments .treatment-card.is-active strong {
    border-color: rgba(32, 63, 101, 0.28);
    background: linear-gradient(135deg, var(--intro-blue-deep), var(--intro-blue));
    color: #ffffff;
    box-shadow:
        0 10px 24px rgba(32, 63, 101, 0.22),
        inset 0 -3px 0 rgba(166, 83, 42, 0.68);
}

@media (max-width: 940px) {
    #treatments .treatment-card:hover,
    #treatments .treatment-card:focus-visible,
    #treatments .treatment-card.is-active {
        transform: none;
    }
}

/* Distinct textures for the first three intro modules. */
#position {
    background:
        radial-gradient(ellipse 58% 42% at 18% 22%, rgba(255, 255, 255, 0.78), transparent 64%),
        radial-gradient(ellipse 42% 34% at 86% 18%, rgba(49, 95, 143, 0.18), transparent 70%),
        radial-gradient(ellipse 36% 28% at 74% 82%, rgba(166, 83, 42, 0.10), transparent 72%),
        linear-gradient(135deg, #edf5fb 0%, #f9fcff 48%, #e7f1f8 100%);
}

#design {
    background:
        linear-gradient(118deg, transparent 0 18%, rgba(49, 95, 143, 0.10) 18% 19%, transparent 19% 42%, rgba(123, 151, 110, 0.14) 42% 43%, transparent 43% 100%),
        linear-gradient(152deg, transparent 0 36%, rgba(255, 255, 255, 0.54) 36% 39%, transparent 39% 100%),
        radial-gradient(ellipse 38% 52% at 82% 16%, rgba(123, 151, 110, 0.22), transparent 68%),
        linear-gradient(135deg, #ddebe2 0%, #f4faf5 52%, #dce8df 100%);
}

#variables {
    background:
        linear-gradient(90deg, rgba(49, 95, 143, 0.065) 1px, transparent 1px) 0 0 / 42px 42px,
        linear-gradient(0deg, rgba(166, 83, 42, 0.045) 1px, transparent 1px) 0 0 / 42px 42px,
        linear-gradient(135deg, rgba(255, 255, 255, 0.76), transparent 44%),
        radial-gradient(ellipse 44% 36% at 82% 20%, rgba(49, 95, 143, 0.11), transparent 70%),
        #ffffff;
}

@media (max-width: 560px) {
    .intro-layout {
        width: min(100% - 20px, 1280px);
    }

    .reading-rail nav {
        grid-template-columns: 1fr;
    }
}

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

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

    .reveal {
        opacity: 1;
        transform: none;
    }

    .question-track {
        animation: none;
    }
}

/* Final intro layout refinement: clean background, fixed left reading rail, centered content bands. */
:root {
    --intro-text: #172026;
    --intro-muted: #607080;
    --intro-line: rgba(23, 32, 38, 0.12);
    --intro-blue: #315f8f;
    --intro-blue-deep: #203f65;
    --intro-ink: #111923;
    --intro-rust: #a6532a;
    --intro-soft-blue: #eef5fb;
    --intro-soft-green: #eff6f3;
    --intro-soft-warm: #f7f0e8;
    --intro-soft-gray: #f6f7f8;
}

html,
body {
    background: #ffffff;
}

body {
    color: var(--intro-text);
    background: #ffffff;
}

body::before,
body::after {
    display: none;
}

.scroll-progress {
    height: 4px;
    background: linear-gradient(90deg, var(--intro-blue-deep), var(--intro-rust));
    box-shadow: none;
}

.topbar {
    min-height: 72px;
    border-bottom: 1px solid rgba(17, 25, 35, 0.10);
    background: rgba(255, 255, 255, 0.92);
    box-shadow: 0 10px 28px rgba(17, 25, 35, 0.045);
    backdrop-filter: blur(18px) saturate(1.05);
}

.brand {
    color: var(--intro-ink);
}

.brand::before {
    border-color: var(--intro-blue);
    box-shadow: 6px 6px 0 rgba(166, 83, 42, 0.16);
}

.page-tabs a {
    border-radius: 6px;
}

.page-tabs a:hover,
.page-tabs a.is-current {
    background: rgba(49, 95, 143, 0.09);
    color: var(--intro-blue-deep);
}

.back {
    border: 0;
    border-radius: 999px;
    background: transparent;
    color: var(--intro-blue-deep);
    transition: background 160ms ease, color 160ms ease;
}

.back:hover {
    background: rgba(49, 95, 143, 0.10);
    color: var(--intro-blue-deep);
}

.intro-layout {
    width: 100%;
    display: block;
    margin: 0;
}

main {
    width: min(1120px, calc(100% - 56px));
    margin: 0 auto;
    padding: 0;
}

.reading-rail {
    position: fixed;
    top: 108px;
    left: clamp(14px, 2.2vw, 34px);
    z-index: 25;
    width: min(236px, calc(100vw - 28px));
    max-height: calc(100dvh - 136px);
    margin: 0;
    padding: 10px;
    border: 1px solid rgba(49, 95, 143, 0.13);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.86);
    box-shadow: 0 18px 44px rgba(17, 25, 35, 0.10);
    backdrop-filter: blur(18px);
    overflow: auto;
}

.reading-rail nav {
    display: grid;
    gap: 3px;
}

.reading-rail a {
    min-height: 38px;
    padding: 0 10px;
    border: 1px solid transparent;
    border-radius: 6px;
    color: var(--intro-muted);
    font-size: 12px;
    font-weight: 800;
    line-height: 1.35;
}

.reading-rail a::before {
    color: rgba(49, 95, 143, 0.58);
}

.reading-rail a:hover,
.reading-rail a.is-current {
    transform: translateX(2px);
    border-color: rgba(49, 95, 143, 0.12);
    background: rgba(49, 95, 143, 0.09);
    color: var(--intro-blue-deep);
}

.hero {
    width: 100vw;
    min-height: calc(100dvh - 72px);
    display: grid;
    align-content: center;
    margin: 0 0 0 calc(50% - 50vw);
    padding: clamp(72px, 11vh, 132px) max(28px, calc((100vw - 1120px) / 2)) clamp(42px, 7vh, 82px);
    border: 0;
    background:
        radial-gradient(circle at 86% 18%, rgba(166, 83, 42, 0.14), transparent 24%),
        radial-gradient(circle at 16% 82%, rgba(49, 95, 143, 0.13), transparent 28%),
        linear-gradient(135deg, #ffffff 0%, #f3f7fb 52%, #f8f2ec 100%);
}

.hero-copy {
    max-width: 980px;
}

h1,
h2 {
    font-family: var(--serif);
}

h1 {
    max-width: 960px;
    color: var(--intro-ink);
    font-size: clamp(52px, 7vw, 96px);
    line-height: 1.03;
}

.hero h2 {
    max-width: 860px;
    color: var(--intro-ink);
    font-size: clamp(30px, 3.6vw, 54px);
}

.lead {
    max-width: 900px;
}

.architecture-guide {
    width: 100vw;
    margin-left: calc(50% - 50vw);
    padding: 0 max(28px, calc((100vw - 1120px) / 2));
    border: 0;
    background: #ffffff;
}

.architecture-guide article {
    border-color: var(--intro-line);
}

.section-shell:not(.hero):not(.closing),
.architecture-guide {
    scroll-margin-top: 92px;
}

main > .section-shell:not(.hero):not(.closing) {
    width: 100vw;
    margin: 0 0 0 calc(50% - 50vw);
    padding: clamp(78px, 9vw, 124px) max(28px, calc((100vw - 1120px) / 2));
    border: 0;
}

#position {
    background:
        radial-gradient(circle at 92% 12%, rgba(49, 95, 143, 0.10), transparent 26%),
        var(--intro-soft-blue);
}

#variables {
    background:
        radial-gradient(circle at 8% 16%, rgba(166, 83, 42, 0.10), transparent 28%),
        #ffffff;
}

#treatments {
    background:
        radial-gradient(circle at 90% 16%, rgba(49, 95, 143, 0.09), transparent 24%),
        var(--intro-soft-warm);
}

#algorithms {
    background:
        linear-gradient(135deg, rgba(255, 255, 255, 0.52), transparent 46%),
        var(--intro-soft-gray);
}

#design {
    background:
        radial-gradient(circle at 12% 22%, rgba(49, 95, 143, 0.10), transparent 26%),
        var(--intro-soft-green);
}

#questions {
    background:
        radial-gradient(circle at 88% 12%, rgba(166, 83, 42, 0.10), transparent 25%),
        #ffffff;
}

#capabilities {
    background:
        linear-gradient(135deg, rgba(49, 95, 143, 0.08), transparent 42%),
        var(--intro-soft-blue);
}

#privacy {
    background:
        radial-gradient(circle at 86% 18%, rgba(166, 83, 42, 0.10), transparent 28%),
        #fbfaf8;
}

#boundaries {
    background:
        radial-gradient(circle at 12% 12%, rgba(49, 95, 143, 0.09), transparent 26%),
        var(--intro-soft-gray);
}

.section-head {
    max-width: 980px;
    margin-bottom: clamp(24px, 4vw, 40px);
    padding-bottom: 20px;
    border-bottom: 1px solid rgba(17, 25, 35, 0.14);
}

.section-head h2 {
    color: var(--intro-ink);
    font-size: clamp(32px, 4vw, 58px);
}

main > .section-shell:not(.hero):not(.closing) .section-head::before {
    color: rgba(49, 95, 143, 0.12);
}

.prose-card,
.variable-map,
.condition-matrix,
.treatment-grid,
.module-explorer,
.question-carousel {
    max-width: 980px;
}

.prose-card {
    padding: clamp(24px, 4vw, 38px);
    border: 1px solid rgba(17, 25, 35, 0.10);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.72);
    box-shadow: 0 18px 52px rgba(17, 25, 35, 0.07);
    backdrop-filter: blur(14px);
}

.variable-map,
.condition-matrix,
.treatment-grid {
    border-color: rgba(17, 25, 35, 0.12);
    border-radius: 8px;
    overflow: hidden;
    background: rgba(255, 255, 255, 0.72);
    box-shadow: 0 18px 52px rgba(17, 25, 35, 0.06);
}

.module-explorer,
.question-card p {
    border: 1px solid rgba(17, 25, 35, 0.10);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.72);
    box-shadow: 0 18px 52px rgba(17, 25, 35, 0.06);
}

.closing {
    width: 100vw;
    margin: 0 0 0 calc(50% - 50vw);
    padding: clamp(48px, 6vw, 72px) max(28px, calc((100vw - 1120px) / 2));
    border: 0;
    border-radius: 0;
    background:
        radial-gradient(circle at 86% 12%, rgba(120, 143, 169, 0.28), transparent 34%),
        linear-gradient(135deg, #11161d, #1d232b);
    box-shadow: none;
}

.closing__inner {
    width: 100%;
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: clamp(34px, 7vw, 96px);
}

.closing__brand {
    flex: 0 0 auto;
}

.closing .eyebrow {
    margin: 0 0 12px;
    color: rgba(255, 255, 255, 0.54);
    font-size: 13px;
    letter-spacing: 0;
}

.closing h2 {
    margin: 0;
    color: #ffffff;
    font-family: Georgia, "Times New Roman", serif;
    font-size: clamp(48px, 6vw, 76px);
    line-height: 0.92;
    letter-spacing: 0;
}

.closing__filings {
    min-width: 0;
    padding-top: 18px;
    border-top: 1px solid rgba(255, 255, 255, 0.14);
}

.filing-row {
    margin: 0;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    color: rgba(255, 255, 255, 0.52);
    font-size: 13px;
    line-height: 1.8;
    letter-spacing: 0;
}

.filing-row a {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: rgba(255, 255, 255, 0.88);
    text-decoration: none;
    transition: color 180ms ease;
}

.filing-row a::after {
    content: "";
    position: absolute;
    right: 0;
    bottom: 1px;
    left: 0;
    height: 1px;
    background: rgba(142, 177, 211, 0.72);
    transform: scaleX(0.3);
    transform-origin: right;
    transition: transform 180ms ease, background-color 180ms ease;
}

.filing-row a:hover,
.filing-row a:focus-visible {
    color: #ffffff;
}

.filing-row a:hover::after,
.filing-row a:focus-visible::after {
    background: #8eb1d3;
    transform: scaleX(1);
}

.filing-row a:focus-visible {
    outline: 2px solid rgba(142, 177, 211, 0.72);
    outline-offset: 5px;
    border-radius: 2px;
}

.filing-divider {
    width: 1px;
    height: 14px;
    margin: 0 6px;
    background: rgba(255, 255, 255, 0.18);
}

.public-security-filing img {
    width: 17px;
    height: auto;
    flex: 0 0 auto;
}

@media (max-width: 1280px) {
    main {
        width: min(1060px, calc(100% - 56px));
    }

    .reading-rail {
        position: sticky;
        top: 72px;
        left: auto;
        width: 100%;
        max-height: none;
        margin: 0;
        border-right: 0;
        border-left: 0;
        border-radius: 0;
        background: rgba(255, 255, 255, 0.96);
    }

    .reading-rail nav {
        display: flex;
        overflow-x: auto;
    }

    .reading-rail a {
        flex: 0 0 auto;
    }

    .hero,
    .architecture-guide,
    main > .section-shell:not(.hero):not(.closing),
    .closing {
        padding-right: max(28px, calc((100vw - 1060px) / 2));
        padding-left: max(28px, calc((100vw - 1060px) / 2));
    }
}

@media (max-width: 940px) {
    main {
        width: 100%;
    }

    .hero {
        min-height: calc(100dvh - 118px);
        padding: 54px 22px 38px;
    }

    .architecture-guide,
    main > .section-shell:not(.hero):not(.closing),
    .closing {
        padding: 62px 22px;
    }

    .architecture-guide {
        padding-top: 0;
        padding-bottom: 0;
    }

    h1 {
        font-size: 42px;
    }

    .hero h2 {
        font-size: 28px;
    }

    .closing {
        border-radius: 0;
    }

    .closing__inner {
        align-items: flex-start;
        flex-direction: column;
        gap: 28px;
    }

    .closing__filings {
        width: 100%;
    }

    .filing-row {
        align-items: flex-start;
    }

    .filing-divider {
        display: none;
    }

    .public-security-filing {
        flex-basis: 100%;
    }

    .prose-card {
        padding: 22px;
    }
}

/* Liquid glass refinements for intro content density and contrast. */
.architecture-guide {
    width: min(980px, calc(100% - 56px));
    margin: clamp(28px, 4vw, 48px) auto 0;
    margin-left: auto;
    padding: 12px;
    gap: 12px;
    border: 1px solid rgba(255, 255, 255, 0.58);
    border-radius: 22px;
    background:
        linear-gradient(135deg, rgba(255, 255, 255, 0.68), rgba(255, 255, 255, 0.30)),
        radial-gradient(circle at 12% 18%, rgba(49, 95, 143, 0.16), transparent 36%),
        radial-gradient(circle at 86% 74%, rgba(166, 83, 42, 0.10), transparent 34%);
    box-shadow:
        0 24px 70px rgba(17, 25, 35, 0.12),
        inset 0 1px 0 rgba(255, 255, 255, 0.72);
    backdrop-filter: blur(20px) saturate(1.18);
}

.architecture-guide article {
    min-height: 150px;
    border: 1px solid rgba(255, 255, 255, 0.58);
    border-radius: 16px;
    background:
        linear-gradient(145deg, rgba(255, 255, 255, 0.68), rgba(255, 255, 255, 0.36));
    box-shadow:
        0 12px 34px rgba(17, 25, 35, 0.08),
        inset 0 1px 0 rgba(255, 255, 255, 0.70);
    backdrop-filter: blur(16px) saturate(1.12);
}

.architecture-guide article:last-child {
    border-right: 1px solid rgba(255, 255, 255, 0.58);
}

#position .prose-card {
    max-width: 900px;
    padding: 0;
    border: 0;
    border-radius: 0;
    background: transparent;
    box-shadow: none;
    backdrop-filter: none;
}

#position .prose-card p {
    max-width: 880px;
}

#design {
    background:
        radial-gradient(circle at 12% 18%, rgba(49, 95, 143, 0.16), transparent 28%),
        radial-gradient(circle at 82% 28%, rgba(123, 151, 110, 0.22), transparent 30%),
        radial-gradient(circle at 72% 86%, rgba(255, 255, 255, 0.34), transparent 28%),
        linear-gradient(135deg, #dfece1 0%, #eef6ee 54%, #d9e6dc 100%);
}

#capabilities {
    background:
        radial-gradient(circle at 18% 20%, rgba(49, 95, 143, 0.18), transparent 30%),
        radial-gradient(circle at 86% 72%, rgba(120, 143, 169, 0.20), transparent 32%),
        linear-gradient(135deg, #eef5fb 0%, #f8fbfd 48%, #e7f0f8 100%);
}

#privacy {
    background:
        radial-gradient(circle at 76% 18%, rgba(166, 83, 42, 0.16), transparent 30%),
        radial-gradient(circle at 20% 76%, rgba(49, 95, 143, 0.14), transparent 31%),
        radial-gradient(circle at 86% 84%, rgba(123, 151, 110, 0.16), transparent 24%),
        linear-gradient(135deg, #fbfaf8 0%, #f5f1eb 54%, #fbfaf8 100%);
}

#boundaries {
    background:
        radial-gradient(circle at 14% 16%, rgba(49, 95, 143, 0.16), transparent 28%),
        radial-gradient(circle at 86% 26%, rgba(166, 83, 42, 0.12), transparent 30%),
        radial-gradient(circle at 60% 86%, rgba(120, 143, 169, 0.14), transparent 26%),
        linear-gradient(135deg, #f4f6f8 0%, #ffffff 50%, #eef2f5 100%);
}

#design .prose-card,
#capabilities .prose-card,
#privacy .prose-card,
#boundaries .prose-card {
    border: 1px solid rgba(255, 255, 255, 0.58);
    background:
        linear-gradient(135deg, rgba(255, 255, 255, 0.52), rgba(255, 255, 255, 0.24));
    box-shadow:
        0 22px 64px rgba(17, 25, 35, 0.10),
        inset 0 1px 0 rgba(255, 255, 255, 0.66);
    backdrop-filter: blur(22px) saturate(1.22);
}

.condition-matrix .matrix-code {
    display: grid;
    min-height: 82px;
    place-items: center;
    color: var(--intro-blue-deep);
    font-family: var(--serif);
    font-size: 27px;
    font-weight: 700;
    background: transparent;
    cursor: default;
    user-select: text;
}

.condition-matrix .matrix-code:hover,
.condition-matrix .matrix-code:focus {
    background: transparent;
    color: var(--intro-blue-deep);
}

@media (max-width: 1280px) {
    .architecture-guide {
        width: min(980px, calc(100% - 56px));
        padding: 12px;
    }
}

@media (max-width: 940px) {
    .architecture-guide {
        width: calc(100% - 44px);
        grid-template-columns: 1fr;
        padding: 10px;
    }

    .architecture-guide article {
        min-height: auto;
    }

    .condition-matrix .matrix-code {
        min-height: 66px;
        font-size: 23px;
    }
}

/* Debug refinements: fold guide cards into hero and improve treatment readability. */
.hero {
    align-content: center;
    gap: clamp(28px, 4vw, 46px);
}

.hero .architecture-guide {
    width: min(1040px, 100%);
    margin: 0;
    padding: 0;
    gap: 14px;
    border: 0;
    border-radius: 0;
    background: transparent;
    box-shadow: none;
    backdrop-filter: none;
}

.hero .architecture-guide article {
    min-height: 142px;
    border: 1px solid rgba(255, 255, 255, 0.62);
    border-radius: 18px;
    background:
        linear-gradient(145deg, rgba(255, 255, 255, 0.56), rgba(255, 255, 255, 0.24));
    box-shadow:
        0 18px 46px rgba(17, 25, 35, 0.10),
        inset 0 1px 0 rgba(255, 255, 255, 0.72);
    backdrop-filter: blur(18px) saturate(1.16);
}

.hero .architecture-guide article:last-child {
    border-right: 1px solid rgba(255, 255, 255, 0.62);
}

.map-column.result {
    background: transparent;
}

.variable-map .map-column.result span {
    color: var(--blue);
}

.variable-map .map-column.result strong {
    color: var(--ink);
}

.variable-map .map-column.result p {
    color: var(--muted);
}

#treatments .treatment-grid {
    max-width: min(1120px, 100%);
}

#treatments .treatment-card {
    grid-template-columns: 76px minmax(0, 1fr);
    gap: 28px;
    padding: 30px 34px;
}

#treatments .treatment-card::before {
    right: 34px;
    max-width: 360px;
    text-align: right;
}

#treatments .treatment-card p {
    max-width: none;
    padding-top: 28px;
    padding-right: clamp(0px, 18vw, 240px);
}

@media (max-width: 940px) {
    .hero .architecture-guide {
        width: 100%;
        grid-template-columns: 1fr;
        gap: 12px;
    }

    #treatments .treatment-card {
        grid-template-columns: 1fr;
        gap: 14px;
        padding: 24px 22px;
    }

    #treatments .treatment-card::before {
        position: static;
        max-width: none;
        text-align: left;
    }

    #treatments .treatment-card p {
        padding-top: 0;
        padding-right: 0;
    }
}

/* 2026 editorial-tech redesign: shared visual language for TRACE documentation. */
:root {
    --trace-ink: #111114;
    --trace-copy: #34343b;
    --trace-muted: #777781;
    --trace-hairline: rgba(17, 17, 20, 0.10);
    --trace-paper: #fbfbfc;
    --trace-panel: rgba(255, 255, 255, 0.86);
    --trace-lavender: #c9c5f4;
    --trace-ice: #dfeaf8;
    --trace-yellow: #ffd54f;
    --trace-shadow: 0 24px 70px rgba(31, 31, 45, 0.10);
    --trace-radius-lg: 30px;
    --trace-radius-md: 20px;
}

.platform-intro-page {
    color: var(--trace-copy);
    background:
        linear-gradient(112deg, transparent 0 72%, rgba(201, 197, 244, 0.24) 92%, transparent 100%),
        var(--trace-paper);
}

.platform-intro-page .platform-site-header {
    min-height: 76px;
    padding-inline: clamp(24px, 5vw, 72px);
    border-bottom-color: rgba(17, 17, 20, 0.08);
    background: rgba(251, 251, 252, 0.86);
    box-shadow: none;
}

.platform-intro-page .platform-site-brand {
    color: var(--trace-ink);
    font-size: 24px;
    font-weight: 950;
}

.platform-intro-page .platform-logo {
    width: 22px;
    height: 22px;
    border: 0;
    border-radius: 50%;
    background: var(--trace-yellow);
    box-shadow: 0 0 0 5px #fff, 0 10px 26px rgba(17, 17, 20, 0.18);
}

.platform-intro-page .platform-site-menu a {
    border-radius: 0;
}

.platform-intro-page .platform-site-menu a.active {
    background: transparent;
    color: var(--trace-ink);
    box-shadow: inset 0 -2px 0 var(--trace-ink);
}

.platform-intro-page .platform-login-link {
    min-width: 102px;
    background: var(--trace-ink);
    box-shadow: none;
}

.platform-intro-page .scroll-progress {
    height: 3px;
    background: linear-gradient(90deg, var(--trace-ink), #6e6aa4 62%, var(--trace-yellow));
}

.platform-intro-page .intro-layout,
.platform-intro-page main {
    width: 100%;
    max-width: none;
    margin: 0;
}

.platform-intro-page .hero {
    position: relative;
    isolation: isolate;
    width: min(1360px, calc(100% - 48px));
    min-height: min(820px, calc(100dvh - 76px));
    display: grid;
    grid-template-columns: minmax(0, 0.9fr) minmax(360px, 1.1fr);
    grid-template-rows: 1fr auto;
    align-items: center;
    gap: clamp(36px, 6vw, 88px);
    margin: 0 auto;
    padding: clamp(72px, 10vw, 132px) clamp(0px, 2vw, 24px) 64px;
    overflow: visible;
    background: transparent;
}

.platform-intro-page .hero::before {
    content: "";
    position: absolute;
    z-index: -2;
    top: 0;
    right: calc(50% - 50vw + 24px);
    width: max(48%, calc((100vw - 1360px) / 2 + 48%));
    height: 60%;
    display: block;
    border-radius: 0 0 0 72px;
    background:
        linear-gradient(145deg, rgba(217, 229, 249, 0.94), rgba(198, 193, 241, 0.90) 68%, rgba(239, 237, 255, 0.86));
    box-shadow: inset 1px 0 0 rgba(255, 255, 255, 0.65);
}

.platform-intro-page .hero::after {
    content: "";
    position: absolute;
    z-index: -1;
    top: clamp(58px, 8vw, 110px);
    right: clamp(0px, 3vw, 48px);
    width: 66px;
    height: 66px;
    display: block;
    border: 8px solid rgba(255, 255, 255, 0.92);
    border-radius: 50%;
    background: var(--trace-yellow);
    box-shadow: 0 14px 34px rgba(17, 17, 20, 0.18);
}

.platform-intro-page .hero-copy {
    grid-column: 1;
    max-width: 650px;
}

.platform-intro-page .hero .eyebrow {
    color: var(--trace-muted);
    font-size: 12px;
    font-weight: 850;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.platform-intro-page h1,
.platform-intro-page h2,
.platform-intro-page .module-card h3 {
    font-family: var(--sans);
    letter-spacing: 0;
}

.platform-intro-page h1 {
    margin-top: 26px;
    color: #050506;
    font-size: clamp(72px, 9vw, 132px);
    font-weight: 950;
    line-height: 0.82;
}

.platform-intro-page .hero h2 {
    max-width: 620px;
    margin-top: 34px;
    color: var(--trace-ink);
    font-size: clamp(26px, 3vw, 44px);
    font-weight: 760;
    line-height: 1.24;
}

.platform-intro-page .lead {
    max-width: 670px;
    color: #5d5d66;
    font-size: 16px;
    line-height: 1.85;
}

.platform-intro-page .hero .architecture-guide {
    grid-column: 1 / -1;
    grid-row: 2;
    width: min(920px, 74%);
    justify-self: end;
    margin: 0;
    padding: 0;
    gap: 16px;
    border: 0;
    border-radius: 0;
    background: transparent;
    box-shadow: none;
    backdrop-filter: none;
}

.platform-intro-page .hero .architecture-guide article {
    min-height: 154px;
    padding: 28px 30px;
    border: 1px solid rgba(255, 255, 255, 0.84);
    border-radius: 26px;
    background: rgba(255, 255, 255, 0.74);
    box-shadow: var(--trace-shadow);
    backdrop-filter: blur(22px) saturate(1.1);
    transition: transform 220ms ease, box-shadow 220ms ease, background 220ms ease;
}

.platform-intro-page .hero .architecture-guide article:first-child {
    background: var(--trace-ink);
    color: #fff;
}

.platform-intro-page .hero .architecture-guide article:first-child strong,
.platform-intro-page .hero .architecture-guide article:first-child p,
.platform-intro-page .hero .architecture-guide article:first-child span {
    color: #fff;
}

.platform-intro-page .hero .architecture-guide article:hover {
    transform: translateY(-4px);
    box-shadow: 0 30px 84px rgba(31, 31, 45, 0.14);
}

.platform-intro-page main > .section-shell:not(.hero):not(.closing) {
    position: relative;
    width: min(1320px, calc(100% - 48px));
    display: grid;
    grid-template-columns: minmax(190px, 0.55fr) minmax(0, 1.65fr);
    column-gap: clamp(42px, 7vw, 112px);
    align-items: start;
    margin: 0 auto;
    padding: clamp(92px, 11vw, 152px) 0;
    background: transparent !important;
}

.platform-intro-page .section-head {
    position: sticky;
    top: 112px;
    display: grid;
    justify-items: start;
    gap: 18px;
    width: auto;
    margin: 0;
    padding: 0;
    border: 0;
}

.platform-intro-page .section-head::before,
.platform-intro-page main > .section-shell:not(.hero):not(.closing) .section-head::before {
    position: static;
    width: 38px;
    height: 38px;
    display: grid;
    place-items: center;
    border-radius: 9px;
    background: var(--trace-ink);
    color: #fff;
    font-family: var(--sans);
    font-size: 12px;
    font-weight: 900;
    line-height: 1;
    box-shadow: 0 10px 24px rgba(17, 17, 20, 0.16);
}

.platform-intro-page .section-head h2 {
    max-width: 240px;
    color: var(--trace-ink);
    font-size: clamp(28px, 3vw, 42px);
    font-weight: 720;
    line-height: 1.2;
}

.platform-intro-page main > .section-shell:not(.hero):not(.closing) > :not(.section-head) {
    grid-column: 2;
    width: 100%;
    max-width: none;
}

.platform-intro-page .prose-card {
    gap: 24px;
    padding: 0;
    border: 0;
    border-radius: 0;
    background: transparent;
    box-shadow: none;
    backdrop-filter: none;
}

.platform-intro-page .prose-card p {
    max-width: 850px;
    color: var(--trace-copy);
    font-size: 16px;
    line-height: 1.95;
}

.platform-intro-page #position .prose-card,
.platform-intro-page #privacy .prose-card {
    padding: clamp(30px, 4vw, 54px);
    border: 1px solid rgba(255, 255, 255, 0.88);
    border-radius: var(--trace-radius-lg);
    background: rgba(255, 255, 255, 0.78);
    box-shadow: var(--trace-shadow);
    backdrop-filter: blur(18px);
}

.platform-intro-page #design .prose-card {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
}

.platform-intro-page #design .prose-card p {
    min-height: 146px;
    padding: 28px;
    border: 1px solid var(--trace-hairline);
    border-radius: var(--trace-radius-md);
    background: rgba(255, 255, 255, 0.82);
    box-shadow: 0 18px 46px rgba(31, 31, 45, 0.06);
}

.platform-intro-page #design .prose-card p:first-child {
    background: var(--trace-ink);
    color: #fff;
}

.platform-intro-page .module-explorer {
    grid-template-columns: minmax(220px, 0.68fr) minmax(0, 1.6fr);
    gap: 18px;
    padding: 0;
    border: 0;
    border-radius: 0;
    background: transparent;
    box-shadow: none;
}

.platform-intro-page .module-index {
    gap: 8px;
}

.platform-intro-page .module-index button {
    min-height: 76px;
    border: 1px solid transparent;
    border-radius: 18px;
    color: #66666f;
}

.platform-intro-page .module-index button:hover {
    background: rgba(255, 255, 255, 0.76);
}

.platform-intro-page .module-index button.is-active {
    border-color: var(--trace-ink);
    background: var(--trace-ink);
    color: #fff;
    transform: none;
    box-shadow: 0 18px 44px rgba(17, 17, 20, 0.16);
}

.platform-intro-page .module-index button.is-active span {
    background: var(--trace-yellow);
    color: var(--trace-ink);
}

.platform-intro-page .module-index button:not([data-module-target]) {
    cursor: default;
    opacity: 0.52;
}

.platform-intro-page .module-stage {
    min-height: 430px;
    border: 1px solid rgba(255, 255, 255, 0.9);
    border-radius: var(--trace-radius-lg);
    background:
        linear-gradient(145deg, rgba(255, 255, 255, 0.96), rgba(244, 246, 252, 0.90));
    box-shadow: var(--trace-shadow);
}

.platform-intro-page .module-card {
    padding: clamp(34px, 5vw, 60px);
}

.platform-intro-page .module-card h3 {
    color: var(--trace-ink);
    font-size: clamp(28px, 3vw, 44px);
    font-weight: 820;
}

.platform-intro-page .module-tags span {
    border-color: rgba(17, 17, 20, 0.12);
    background: #fff;
    color: #494953;
}

.platform-intro-page .variable-map {
    gap: 0;
    border: 1px solid var(--trace-hairline);
    border-radius: var(--trace-radius-lg);
    background: rgba(255, 255, 255, 0.84);
    box-shadow: var(--trace-shadow);
}

.platform-intro-page .map-column,
.platform-intro-page .map-operator {
    border-color: var(--trace-hairline);
}

.platform-intro-page .map-operator {
    color: var(--trace-muted);
}

.platform-intro-page .condition-matrix {
    margin-top: 18px;
    border: 1px solid var(--trace-hairline);
    border-radius: var(--trace-radius-md);
    background: rgba(255, 255, 255, 0.76);
    box-shadow: 0 18px 48px rgba(31, 31, 45, 0.07);
}

.platform-intro-page .condition-matrix .matrix-code {
    color: var(--trace-ink);
    font-family: var(--sans);
    font-weight: 900;
}

.platform-intro-page #treatments .treatment-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
    border: 0;
    border-radius: 0;
    background: transparent;
    box-shadow: none;
    overflow: visible;
}

.platform-intro-page #treatments .treatment-card {
    min-height: 218px;
    grid-template-columns: 64px minmax(0, 1fr);
    gap: 22px;
    padding: 28px;
    border: 1px solid rgba(255, 255, 255, 0.88);
    border-radius: var(--trace-radius-md);
    background: rgba(255, 255, 255, 0.78);
    box-shadow: 0 18px 48px rgba(31, 31, 45, 0.07);
    transition: border-color 200ms ease, box-shadow 200ms ease, background 200ms ease;
}

.platform-intro-page #treatments .treatment-card::before {
    position: static;
    grid-column: 2;
    max-width: none;
    text-align: left;
    color: var(--trace-muted);
}

.platform-intro-page #treatments .treatment-card strong {
    grid-row: 1 / span 2;
    color: var(--trace-ink);
    font-family: var(--sans);
    font-size: 32px;
}

.platform-intro-page #treatments .treatment-card p {
    grid-column: 2;
    max-width: none;
    padding: 0;
    color: var(--trace-copy);
    line-height: 1.78;
}

.platform-intro-page #treatments .treatment-card:hover,
.platform-intro-page #treatments .treatment-card:focus-visible,
.platform-intro-page #treatments .treatment-card.is-active {
    border-color: rgba(17, 17, 20, 0.18);
    background: #fff;
    box-shadow: 0 26px 68px rgba(31, 31, 45, 0.12);
    outline: none;
}

.platform-intro-page #capabilities .prose-card {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
}

.platform-intro-page #capabilities .prose-card p {
    min-height: 72px;
    display: flex;
    align-items: center;
    padding: 18px 22px;
    border: 1px solid var(--trace-hairline);
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.80);
}

.platform-intro-page #questions {
    margin-top: 40px;
    margin-bottom: 110px;
    padding: clamp(72px, 8vw, 108px) clamp(24px, 5vw, 70px);
    border: 1px solid rgba(255, 255, 255, 0.9);
    border-radius: 38px;
    background:
        linear-gradient(135deg, rgba(201, 197, 244, 0.88), rgba(255, 255, 255, 0.94) 48%, rgba(220, 232, 249, 0.92)) !important;
    box-shadow: var(--trace-shadow);
    overflow: hidden;
}

.platform-intro-page #questions .section-head {
    position: static;
}

.platform-intro-page .question-carousel {
    border: 0;
    mask-image: linear-gradient(90deg, transparent, #000 5%, #000 95%, transparent);
}

.platform-intro-page .question-card p {
    min-height: 112px;
    border: 1px solid rgba(255, 255, 255, 0.94);
    border-radius: 22px;
    background: rgba(255, 255, 255, 0.76);
    color: var(--trace-ink);
    box-shadow: 0 16px 38px rgba(31, 31, 45, 0.08);
}

.platform-intro-page .closing {
    width: min(1320px, calc(100% - 48px));
    margin: 0 auto 48px;
    padding: clamp(48px, 6vw, 78px);
    border-radius: 34px;
    background:
        linear-gradient(118deg, #08080a 0%, #15151b 62%, #242235 100%);
    box-shadow: 0 30px 80px rgba(17, 17, 20, 0.20);
}

.platform-intro-page .closing__inner {
    align-items: center;
}

.platform-intro-page .filing-row a::after {
    background: var(--trace-yellow);
}

@media (max-width: 1100px) {
    .platform-intro-page .hero {
        width: min(100% - 36px, 1040px);
        grid-template-columns: minmax(0, 1fr) minmax(280px, 0.7fr);
    }

    .platform-intro-page main > .section-shell:not(.hero):not(.closing) {
        width: min(100% - 40px, 1040px);
        grid-template-columns: 180px minmax(0, 1fr);
        column-gap: 44px;
    }

    .platform-intro-page .section-head {
        top: 100px;
    }
}

@media (max-width: 820px) {
    .platform-intro-page .hero {
        width: calc(100% - 32px);
        min-height: auto;
        grid-template-columns: 1fr;
        padding: 80px 4px 54px;
    }

    .platform-intro-page .hero::before {
        top: 0;
        right: -16px;
        width: 54%;
        height: 38%;
        border-radius: 0 0 0 48px;
    }

    .platform-intro-page .hero::after {
        top: 42px;
        right: 14px;
        width: 52px;
        height: 52px;
        border-width: 6px;
    }

    .platform-intro-page .hero .architecture-guide {
        width: 100%;
        grid-template-columns: 1fr 1fr;
    }

    .platform-intro-page main > .section-shell:not(.hero):not(.closing) {
        width: calc(100% - 32px);
        grid-template-columns: 1fr;
        gap: 34px;
        padding: 82px 0;
    }

    .platform-intro-page .section-head {
        position: static;
        grid-template-columns: auto 1fr;
        align-items: center;
    }

    .platform-intro-page .section-head h2 {
        max-width: none;
    }

    .platform-intro-page main > .section-shell:not(.hero):not(.closing) > :not(.section-head) {
        grid-column: 1;
    }

    .platform-intro-page .module-explorer,
    .platform-intro-page #design .prose-card {
        grid-template-columns: 1fr;
    }

    .platform-intro-page .module-index {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .platform-intro-page .module-stage {
        min-height: 520px;
    }

    .platform-intro-page #questions {
        width: calc(100% - 32px);
        margin-bottom: 80px;
        padding-inline: 22px;
    }

    .platform-intro-page .closing {
        width: calc(100% - 32px);
        margin-bottom: 24px;
    }
}

@media (max-width: 560px) {
    .platform-intro-page {
        overflow-x: clip;
    }

    .platform-intro-page *,
    .platform-intro-page *::before,
    .platform-intro-page *::after {
        min-width: 0;
    }

    .platform-intro-page .platform-site-header {
        width: 100%;
        display: grid;
        grid-template-columns: minmax(0, 1fr) auto;
        align-items: center;
        gap: 10px 12px;
        padding-inline: 16px;
    }

    .platform-intro-page .platform-site-brand {
        grid-column: 1;
        grid-row: 1;
    }

    .platform-intro-page .platform-site-actions {
        grid-column: 2;
        grid-row: 1;
        margin: 0;
    }

    .platform-intro-page .platform-site-menu {
        grid-column: 1 / -1;
        grid-row: 2;
        width: 100%;
        order: initial;
    }

    .platform-intro-page .platform-login-link {
        min-width: 76px;
        padding-inline: 14px;
    }

    .platform-intro-page .hero,
    .platform-intro-page .hero-copy,
    .platform-intro-page .hero .architecture-guide,
    .platform-intro-page main > .section-shell:not(.hero):not(.closing),
    .platform-intro-page main > .section-shell:not(.hero):not(.closing) > :not(.section-head) {
        max-width: 100%;
    }

    .platform-intro-page h1,
    .platform-intro-page h2,
    .platform-intro-page h3,
    .platform-intro-page p,
    .platform-intro-page strong,
    .platform-intro-page span {
        overflow-wrap: anywhere;
    }

    .platform-intro-page h1 {
        font-size: 68px;
    }

    .platform-intro-page .hero h2 {
        font-size: 25px;
    }

    .platform-intro-page .hero .architecture-guide,
    .platform-intro-page .module-index,
    .platform-intro-page #treatments .treatment-grid,
    .platform-intro-page #capabilities .prose-card {
        grid-template-columns: 1fr;
    }

    .platform-intro-page .hero .architecture-guide article {
        min-height: 132px;
    }

    .platform-intro-page .module-stage {
        min-height: 610px;
    }

    .platform-intro-page #treatments .treatment-card {
        min-height: auto;
        grid-template-columns: 1fr;
    }

    .platform-intro-page #treatments .treatment-card strong,
    .platform-intro-page #treatments .treatment-card::before,
    .platform-intro-page #treatments .treatment-card p {
        grid-column: 1;
        grid-row: auto;
    }

    .platform-intro-page .closing {
        padding: 38px 24px;
    }
}

/* 2026 halo and glass refinement. */
html {
    overflow-x: clip;
}

.platform-intro-page {
    --trace-glass: rgba(255, 255, 255, 0.46);
    --trace-glass-strong: rgba(255, 255, 255, 0.64);
    --trace-glass-border: rgba(255, 255, 255, 0.76);
    --trace-glass-shadow: 0 22px 58px rgba(63, 66, 92, 0.10);
    overflow-x: clip;
    background:
        radial-gradient(circle at 88% 8%, rgba(194, 190, 243, 0.22), transparent 13%),
        radial-gradient(circle at 8% 31%, rgba(207, 226, 248, 0.20), transparent 14%),
        radial-gradient(circle at 84% 58%, rgba(213, 206, 246, 0.18), transparent 15%),
        radial-gradient(circle at 16% 82%, rgba(208, 230, 247, 0.20), transparent 14%),
        #fff;
}

.platform-intro-page .hero::before {
    top: -8%;
    right: -9%;
    width: clamp(390px, 52vw, 760px);
    height: auto;
    aspect-ratio: 1;
    border-radius: 50%;
    background: radial-gradient(circle at 46% 48%, rgba(185, 181, 239, 0.72) 0 24%, rgba(211, 222, 249, 0.50) 48%, rgba(255, 255, 255, 0) 72%);
    filter: blur(30px);
    box-shadow: none;
}

.platform-intro-page main > .section-shell:not(.hero):not(.closing) {
    isolation: isolate;
}

.platform-intro-page main > .section-shell:not(.hero):not(.closing)::before {
    content: "";
    position: absolute;
    z-index: -1;
    top: 8%;
    left: -24%;
    width: clamp(340px, 42vw, 640px);
    aspect-ratio: 1;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(204, 222, 246, 0.44) 0 28%, rgba(207, 201, 244, 0.28) 48%, rgba(255, 255, 255, 0) 72%);
    filter: blur(44px);
    pointer-events: none;
}

.platform-intro-page main > .section-shell:not(.hero):not(.closing):nth-of-type(odd)::before {
    right: -24%;
    left: auto;
    background: radial-gradient(circle, rgba(199, 193, 241, 0.42) 0 26%, rgba(213, 230, 248, 0.28) 50%, rgba(255, 255, 255, 0) 72%);
}

.platform-intro-page .section-head::before,
.platform-intro-page main > .section-shell:not(.hero):not(.closing) .section-head::before {
    display: none !important;
    content: none !important;
}

.platform-intro-page .prose-card,
.platform-intro-page .module-stage,
.platform-intro-page #treatments .treatment-card,
.platform-intro-page .condition-matrix,
.platform-intro-page .question-card p {
    border: 1px solid var(--trace-glass-border);
    background: linear-gradient(145deg, var(--trace-glass-strong), rgba(255, 255, 255, 0.24)) !important;
    box-shadow: var(--trace-glass-shadow);
    backdrop-filter: blur(24px) saturate(0.88);
    -webkit-backdrop-filter: blur(24px) saturate(0.88);
}

.platform-intro-page #position .prose-card,
.platform-intro-page #privacy .prose-card {
    background: linear-gradient(145deg, rgba(255, 255, 255, 0.58), rgba(255, 255, 255, 0.26)) !important;
}

.platform-intro-page #design .prose-card,
.platform-intro-page #capabilities .prose-card {
    padding: 0;
    border: 0;
    background: transparent !important;
    box-shadow: none;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
}

.platform-intro-page #design .prose-card p,
.platform-intro-page #capabilities .prose-card p {
    border: 1px solid var(--trace-glass-border);
    background: linear-gradient(145deg, rgba(255, 255, 255, 0.56), rgba(255, 255, 255, 0.22)) !important;
    color: var(--trace-copy) !important;
    box-shadow: var(--trace-glass-shadow);
    backdrop-filter: blur(22px) saturate(0.86);
    -webkit-backdrop-filter: blur(22px) saturate(0.86);
}

.platform-intro-page #design .prose-card p:first-child {
    background: linear-gradient(145deg, rgba(255, 255, 255, 0.62), rgba(223, 234, 248, 0.28)) !important;
}

.platform-intro-page .module-card {
    background: transparent;
}

.platform-intro-page .module-index button:not(.is-active) {
    border-color: rgba(255, 255, 255, 0.72);
    background: rgba(255, 255, 255, 0.34);
    box-shadow: 0 14px 36px rgba(63, 66, 92, 0.06);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
}

.platform-intro-page #treatments .condition-matrix {
    grid-column: 2;
    width: 100%;
    margin-top: 28px;
    overflow: hidden;
}

.platform-intro-page #questions {
    background: rgba(255, 255, 255, 0.20) !important;
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
}

.platform-intro-page .closing {
    width: 100%;
    max-width: none;
    margin: 0;
    border: 0;
    border-radius: 0;
}

@media (max-width: 820px) {
    .platform-intro-page #treatments .condition-matrix {
        grid-column: 1;
    }
}

@media (max-width: 560px) {
    .platform-intro-page main > .section-shell:not(.hero):not(.closing)::before {
        top: 16%;
        left: -58%;
        width: 520px;
        filter: blur(54px);
    }

    .platform-intro-page main > .section-shell:not(.hero):not(.closing):nth-of-type(odd)::before {
        right: -58%;
        left: auto;
    }

    .platform-intro-page #treatments .condition-matrix {
        overflow-x: auto;
    }
}

/* Coordinated color and conversion refinements. */
.platform-intro-page {
    background:
        radial-gradient(circle at 88% 10%, rgba(197, 164, 238, 0.28), transparent 24%),
        radial-gradient(circle at 14% 78%, rgba(172, 158, 226, 0.18), transparent 28%),
        #ffffff;
}

.platform-intro-page .hero::before {
    background: radial-gradient(circle at 42% 44%, rgba(196, 164, 238, 0.62) 0 24%, rgba(174, 160, 227, 0.30) 48%, rgba(255, 255, 255, 0) 72%);
}

.platform-intro-page .hero::after {
    content: none;
    display: none;
}

.platform-intro-page .hero .architecture-guide {
    width: min(920px, 100%);
    justify-self: start;
}

.platform-intro-page main > .section-shell:not(.hero):not(.closing)::before,
.platform-intro-page main > .section-shell:not(.hero):not(.closing):nth-of-type(odd)::before {
    content: none;
    display: none;
}

.platform-intro-page #design .prose-card p,
.platform-intro-page #capabilities .prose-card p,
.platform-intro-page #privacy .prose-card p,
.platform-intro-page #design .prose-card p:first-child,
.platform-intro-page #capabilities .prose-card p:first-child,
.platform-intro-page #privacy .prose-card p:first-child {
    color: var(--trace-copy) !important;
    font-size: 16px;
    font-weight: 480 !important;
}

.platform-intro-page #questions {
    margin-bottom: clamp(54px, 6vw, 82px);
}

.platform-intro-page .guide-cta {
    position: relative;
    isolation: isolate;
    width: min(1320px, calc(100% - 48px));
    min-height: clamp(420px, 48vw, 570px);
    display: grid;
    place-items: center;
    margin: 0 auto clamp(82px, 9vw, 124px);
    padding: clamp(48px, 8vw, 104px) 24px;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.78);
    border-radius: 42px;
    background:
        radial-gradient(circle at 10% 4%, rgba(197, 163, 239, 0.44), transparent 38%),
        radial-gradient(circle at 82% 92%, rgba(171, 158, 227, 0.28), transparent 42%),
        linear-gradient(135deg, rgba(255, 255, 255, 0.64), rgba(255, 255, 255, 0.34));
    box-shadow: 0 28px 76px rgba(64, 69, 104, 0.14);
    backdrop-filter: blur(30px) saturate(1.06);
    -webkit-backdrop-filter: blur(30px) saturate(1.06);
}

.platform-intro-page .guide-cta::before {
    content: "";
    position: absolute;
    z-index: -1;
    inset: 18% 22%;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.34);
    filter: blur(42px);
}

.platform-intro-page .guide-cta__content {
    width: min(760px, 100%);
    display: grid;
    justify-items: center;
    text-align: center;
}

.platform-intro-page .guide-cta h2 {
    margin: 0;
    color: #111118;
    font-family: var(--sans);
    font-size: clamp(36px, 5vw, 64px);
    font-weight: 560;
    line-height: 1.14;
    letter-spacing: 0;
}

.platform-intro-page .guide-cta p {
    max-width: 560px;
    margin: 38px 0 0;
    color: #656779;
    font-size: clamp(15px, 1.5vw, 19px);
    line-height: 1.75;
}

.platform-intro-page .guide-cta a {
    min-width: 220px;
    min-height: 62px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 18px;
    margin-top: 42px;
    padding: 0 28px;
    border-radius: 999px;
    background: #111116;
    color: #ffffff;
    text-decoration: none;
    font-size: 15px;
    font-weight: 650;
    box-shadow: 0 16px 34px rgba(17, 17, 22, 0.18);
    transition: transform 180ms ease, background-color 180ms ease, box-shadow 180ms ease;
}

.platform-intro-page .guide-cta a:hover,
.platform-intro-page .guide-cta a:focus-visible {
    background: #262638;
    transform: translateY(-2px);
    box-shadow: 0 20px 42px rgba(17, 17, 22, 0.22);
}

.platform-intro-page .guide-cta a:focus-visible {
    outline: 3px solid rgba(88, 143, 210, 0.46);
    outline-offset: 4px;
}

.platform-intro-page .guide-cta__arrow {
    font-size: 22px;
    font-weight: 400;
    line-height: 1;
}

@media (max-width: 820px) {
    .platform-intro-page .guide-cta {
        width: calc(100% - 32px);
        min-height: 440px;
        border-radius: 30px;
    }
}

@media (max-width: 560px) {
    .platform-intro-page .guide-cta {
        min-height: 390px;
        padding: 54px 22px;
        border-radius: 26px;
    }

    .platform-intro-page .guide-cta p {
        margin-top: 26px;
    }

    .platform-intro-page .guide-cta a {
        min-width: 196px;
        min-height: 56px;
        margin-top: 32px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .platform-intro-page .guide-cta a {
        transition: none;
    }
}