:root {
    --font-sans: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    --font-accent: "Barlow Condensed", "Noto Sans SC", sans-serif;
    --bg: #05080d;
    --bg-strong: #0b1017;
    --surface: rgba(255, 255, 255, 0.04);
    --surface-strong: rgba(255, 255, 255, 0.08);
    --surface-soft: rgba(137, 147, 161, 0.12);
    --ink: #f4f7fb;
    --ink-soft: rgba(233, 238, 245, 0.72);
    --line: rgba(255, 255, 255, 0.12);
    --line-strong: rgba(255, 255, 255, 0.24);
    --accent: #f4f7fb;
    --accent-dark: #05080d;
    --accent-soft: rgba(255, 255, 255, 0.08);
    --accent-blue: #95a1b3;
    --accent-steel: #7b8696;
    --paper: #eef2f6;
    --paper-soft: #c7d0da;
    --paper-ink: #11161c;
    --paper-muted: #596472;
    --paper-line: rgba(17, 22, 28, 0.14);
    --type-hero: clamp(34px, 4vw, 48px);
    --type-section: clamp(28px, 3vw, 40px);
    --type-group: clamp(22px, 2.2vw, 30px);
    --type-item: clamp(18px, 1.8vw, 24px);
    --type-process: clamp(17px, 1.5vw, 20px);
    --weight-body: 400;
    --weight-heading: 500;
    --weight-accent: 600;
    --shadow: 0 28px 90px rgba(0, 0, 0, 0.28);
    --radius-xl: 30px;
    --radius-lg: 22px;
    --radius-md: 16px;
    --radius-sm: 12px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

.home-hero[id],
.section[id],
.page-stage[id] {
    scroll-margin-top: 96px;
}

body {
    margin: 0;
    font-family: var(--font-sans);
    font-weight: var(--weight-body);
    color: var(--ink);
    line-height: 1.7;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    background: var(--bg);
}

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

img {
    display: block;
    max-width: 100%;
}

h1,
h2,
h3,
h4,
dt {
    margin: 0;
    font-family: var(--font-sans);
    font-weight: var(--weight-heading);
    line-height: 1.14;
    letter-spacing: -0.035em;
}

p,
dd,
ul {
    margin: 0;
}

.container {
    width: min(1280px, calc(100% - 56px));
    margin: 0 auto;
}

.eyebrow {
    font-family: var(--font-accent);
    color: var(--accent);
    font-size: 12px;
    font-weight: var(--weight-accent);
    letter-spacing: 0.18em;
    text-transform: uppercase;
}

.eyebrow--light {
    color: rgba(244, 247, 251, 0.72);
}

.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 20;
    padding: 0;
    background: linear-gradient(180deg, rgba(5, 8, 13, 0.78) 0%, rgba(5, 8, 13, 0.32) 72%, rgba(5, 8, 13, 0) 100%);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    padding: 18px 0;
    border: 0;
    border-radius: 0;
    background: transparent;
    backdrop-filter: none;
    box-shadow: none;
}

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

.brand-mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.brand-mark__image {
    display: block;
    width: 122px;
    height: auto;
    filter: brightness(0) invert(1);
}

.site-nav {
    display: flex;
    align-items: center;
    gap: 0;
}

.nav-list {
    display: flex;
    align-items: center;
    gap: 16px;
    list-style: none;
    padding: 0;
}

.nav-link,
.header-link {
    font-family: var(--font-accent);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 8px 0;
    border-radius: 0;
    font-size: 12px;
    font-weight: var(--weight-accent);
    letter-spacing: 0.14em;
    text-transform: uppercase;
    transition:
        border-color 180ms ease,
        background-color 180ms ease,
        color 180ms ease,
        opacity 180ms ease;
}

.nav-link:hover,
.header-link:hover,
.nav-link.is-active {
    opacity: 1;
}

.nav-link:hover,
.nav-link.is-active {
    background: transparent;
    color: #ffffff;
    box-shadow: none;
}

.nav-link.is-active {
    font-weight: var(--weight-accent);
}

.header-link {
    min-width: 110px;
    padding: 12px 20px;
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: 0;
    background: #ffffff;
    color: var(--accent-dark);
}

.header-link:hover {
    background: transparent;
    color: #ffffff;
    box-shadow: none;
}

.menu-toggle {
    display: none;
    width: 48px;
    height: 48px;
    padding: 0;
    border: 0;
    border-radius: 50%;
    background: transparent;
    cursor: pointer;
}

.menu-toggle span {
    display: block;
    width: 18px;
    height: 2px;
    margin: 5px auto;
    border-radius: 999px;
    background: #ffffff;
    transition: transform 180ms ease;
}

.hero {
    padding: 80px 0 28px;
}

.hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.08fr) minmax(280px, 0.72fr);
    gap: 72px;
    align-items: end;
}

.panel,
.panel::after,
.panel-strong,
.panel-strong::after,
.hero-points,
.hero-points li::before,
.hero-rail,
.hero-rail__item,
.hero-keywords,
.stack-badge,
.stack-card,
.panel-strong .stack-card__index,
.intro-layout,
.intro-note,
.intro-note__foot,
.architecture-layout,
.architecture-flow,
.flow-row,
.architecture-note,
.architecture-note__eyebrow,
.architecture-note__text,
.ability-list,
.ability-row,
.process-board,
.process-step + .process-step,
.section-condensed {
    all: unset;
}

.hero-copy {
    max-width: 640px;
    padding: 0;
}

.hero-copy h1 {
    max-width: 10ch;
    margin-top: 0;
    font-size: clamp(30px, 4vw, 46px);
    font-weight: 700;
    line-height: 1.14;
    letter-spacing: -0.04em;
}

.hero-lead {
    max-width: 24ch;
    margin-top: 16px;
    color: var(--ink-soft);
    font-size: 15px;
    line-height: 1.65;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 18px;
    margin-top: 24px;
}

.btn {
    font-family: var(--font-accent);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 42px;
    padding: 0 16px;
    border-radius: 0;
    font-size: 13px;
    font-weight: 500;
    letter-spacing: 0;
    transition:
        transform 180ms ease,
        background-color 180ms ease,
        color 180ms ease,
        box-shadow 180ms ease;
}

.btn:hover {
    transform: none;
}

.btn-primary {
    border: 1px solid var(--accent);
    color: #fff;
    background: var(--accent);
    box-shadow: none;
}

.btn-secondary {
    border: 1px solid var(--line-strong);
    background: transparent;
}

.inline-link {
    color: var(--ink-soft);
    font-size: 13px;
    font-weight: 500;
}

.inline-link:hover {
    color: var(--ink);
}

.bullet-list {
    list-style: none;
    padding: 0;
}

.hero-aside {
    display: grid;
    gap: 18px;
    max-width: 320px;
}

.hero-list {
    display: grid;
    gap: 18px;
}

.hero-list__item {
    display: grid;
    gap: 6px;
}

.hero-list__item h2 {
    font-size: 18px;
    font-weight: 700;
    line-height: 1.2;
}

.hero-list__item p,
.bullet-list li {
    color: var(--ink-soft);
}

.bullet-list li {
    position: relative;
    padding-left: 20px;
}

.bullet-list li::before {
    position: absolute;
    left: 0;
    top: 0.55em;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    content: "";
    background: var(--accent);
}

.stack-card__index,
.card-kicker {
    display: block;
    color: var(--accent);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.02em;
}

.section,
.page-hero {
    padding: 88px 0;
}

.page-hero {
    padding-top: 56px;
    padding-bottom: 24px;
}

.page-hero .container {
    padding: 16px 0 0;
}

.page-hero h1,
.section-header h2,
.cta-banner h2 {
    max-width: 14ch;
    font-size: clamp(24px, 3vw, 34px);
    line-height: 1.08;
}

.section-header {
    display: grid;
    gap: 10px;
    max-width: 560px;
    margin-bottom: 24px;
}

.section-lead {
    color: var(--ink-soft);
    font-size: 15px;
    line-height: 1.65;
}

.simple-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 32px;
}

.simple-block h3 {
    margin-top: 8px;
    font-size: 18px;
    line-height: 1.18;
}

.simple-block p:last-child {
    margin-top: 8px;
    color: var(--ink-soft);
}

.intro-layout {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.9fr);
    gap: 48px;
    align-items: start;
}

.intro-layout__copy {
    margin-bottom: 0;
}

.intro-paragraph {
    max-width: 42ch;
    color: var(--ink-soft);
    font-size: 16px;
}

.intro-note {
    display: grid;
    gap: 18px;
    padding: 10px 0 0 28px;
    border-left: 1px solid var(--line-strong);
}

.intro-note h3 {
    font-size: 30px;
}

.intro-list {
    display: grid;
    gap: 12px;
    padding: 0;
    list-style: none;
}

.intro-list li {
    position: relative;
    padding-left: 18px;
    color: var(--ink-soft);
}

.intro-list li::before {
    position: absolute;
    top: 0.6em;
    left: 0;
    width: 7px;
    height: 7px;
    border-radius: 50%;
    content: "";
    background: var(--accent);
}

.intro-note__foot {
    padding-top: 18px;
    border-top: 1px solid var(--line);
    color: var(--ink-soft);
}

.section-alt {
    background: transparent;
}

.card-grid,
.detail-grid,
.scenario-grid,
.timeline-grid {
    display: grid;
    gap: 28px;
}

.card-grid-3,
.detail-grid,
.scenario-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.card-grid-2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.architecture-layout {
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
    gap: 40px;
    align-items: start;
}

.architecture-flow {
    border-top: 0;
}

.flow-row {
    display: grid;
    grid-template-columns: 96px 1fr;
    gap: 24px;
    padding: 0;
    border-bottom: 0;
}

.flow-chip {
    font-family: var(--font-accent);
    display: inline-flex;
    justify-content: center;
    width: fit-content;
    padding: 0;
    border-radius: 0;
    background: transparent;
    color: var(--accent);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.08em;
}

.flow-row h3 {
    font-size: 26px;
    line-height: 1.12;
}

.flow-row p {
    margin-top: 10px;
    color: var(--ink-soft);
}

.architecture-note {
    position: sticky;
    top: 108px;
    padding: 12px 0 0 28px;
    border-left: 1px solid var(--line-strong);
    color: var(--ink);
}

.architecture-note__eyebrow {
    font-family: var(--font-accent);
    color: var(--accent);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.08em;
}

.architecture-note__text {
    margin-top: 14px;
    font-size: 18px;
    line-height: 1.7;
}

.info-card,
.surface-card,
.feature-card,
.detail-card,
.scenario-card,
.capability-card,
.timeline-card,
.cta-banner {
    position: relative;
    overflow: hidden;
    padding: 0;
    border: 0;
    border-radius: 0;
    background: transparent;
    box-shadow: none;
}

.info-card::before,
.surface-card::before,
.feature-card::before,
.detail-card::before,
.scenario-card::before,
.capability-card::before,
.timeline-card::before,
.cta-banner::before {
    display: none;
}

.info-card h3,
.surface-card h3,
.feature-card h3,
.detail-card h2,
.scenario-card h2,
.capability-card h3,
.timeline-card h3 {
    margin-top: 18px;
    font-size: 24px;
    line-height: 1.14;
}

.info-card p:last-child,
.surface-card p,
.feature-card p,
.detail-card p,
.scenario-card p,
.capability-card p,
.timeline-card p {
    margin-top: 12px;
    color: var(--ink-soft);
}

.surface-card__label {
    font-family: var(--font-accent);
    display: inline-flex;
    padding: 0;
    border-radius: 0;
    background: transparent;
    color: var(--accent);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.08em;
}

.info-card,
.surface-card,
.feature-card,
.detail-card,
.scenario-card,
.capability-card,
.timeline-card {
    padding: 0;
    border: 0;
    border-radius: 0;
    background: transparent;
    box-shadow: none;
}

.info-card::before,
.surface-card::before,
.feature-card::before,
.detail-card::before,
.scenario-card::before,
.capability-card::before,
.timeline-card::before {
    display: none;
}

.ability-list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 28px 36px;
    border-top: 0;
}

.ability-row {
    display: grid;
    gap: 14px;
    padding: 0;
    border-bottom: 0;
}

.ability-row__title {
    display: grid;
    grid-template-columns: 56px 1fr;
    gap: 16px;
    align-items: center;
}

.ability-row__title span {
    font-family: var(--font-accent);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: auto;
    height: auto;
    border: 0;
    border-radius: 0;
    background: transparent;
    color: var(--accent-dark);
    font-size: 14px;
    font-weight: 700;
    letter-spacing: 0.04em;
}

.ability-row__title h3 {
    font-size: 24px;
    line-height: 1.14;
}

.ability-row p {
    margin: 0;
    color: var(--ink-soft);
}

.bullet-list {
    display: grid;
    gap: 10px;
    margin-top: 18px;
}

.timeline-card__step {
    font-family: var(--font-accent);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: auto;
    height: auto;
    border: 0;
    border-radius: 0;
    background: transparent;
    color: var(--accent);
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.08em;
}

.process-board {
    display: grid;
    gap: 24px;
    padding: 0;
    border-top: 0;
    border-bottom: 0;
}

.process-step {
    display: grid;
    grid-template-columns: 56px 1fr;
    gap: 22px;
    align-items: start;
    padding: 0;
}

.process-step h3 {
    font-size: 24px;
    line-height: 1.14;
}

.process-step p {
    margin-top: 10px;
    color: var(--ink-soft);
}

.tag-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
}

.tag-cloud span {
    font-family: var(--font-sans);
    display: inline-flex;
    padding: 12px 18px;
    border: 0;
    border-radius: 999px;
    background: rgba(16, 19, 23, 0.04);
    color: var(--ink);
    font-weight: 600;
}

.meta-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
    margin-top: 20px;
}

.meta-grid div {
    padding: 0;
    border-radius: 0;
    background: transparent;
}

.meta-grid dt {
    font-size: 15px;
}

.meta-grid dd {
    margin-top: 8px;
    color: var(--ink-soft);
    font-size: 14px;
}

.cta-banner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    background: transparent;
}

.site-footer {
    padding: 8px 0 28px;
}

.footer-inner {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 16px 24px;
    align-items: center;
    padding: 20px 0 0;
    border-top: 1px solid var(--line);
    border-radius: 0;
    background: transparent;
    color: var(--ink);
    box-shadow: none;
}

.footer-brand {
    display: grid;
    gap: 2px;
}

.footer-brandline {
    font-size: 15px;
    font-weight: 500;
}

.footer-brandtag {
    color: var(--accent-steel);
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.28em;
    text-transform: uppercase;
}

.footer-meta {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 16px;
    color: var(--ink-soft);
    font-size: 13px;
}

[data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
}

@media (max-width: 1040px) {
    .hero-grid,
    .overview-strip,
    .simple-grid,
    .card-grid-3,
    .detail-grid,
    .scenario-grid,
    .intro-layout,
    .architecture-layout,
    .footer-inner {
        grid-template-columns: 1fr;
    }

    .card-grid-2,
    .meta-grid,
    .ability-list {
        grid-template-columns: 1fr;
    }

    .cta-banner {
        align-items: flex-start;
        flex-direction: column;
    }

    .architecture-note {
        position: static;
    }

    .intro-note,
    .architecture-note {
        padding-left: 20px;
    }

    .footer-meta {
        justify-content: flex-start;
    }
}

@media (max-width: 860px) {
    .site-header {
        padding-top: 12px;
    }

    .header-inner {
        border-radius: 28px;
    }

    .menu-toggle {
        display: inline-block;
    }

    .site-nav {
        position: absolute;
        top: calc(100% + 12px);
        right: 20px;
        left: 20px;
        display: none;
        flex-direction: column;
        align-items: stretch;
        padding: 18px;
        border: 1px solid rgba(255, 255, 255, 0.84);
        border-radius: 26px;
        background: rgba(255, 255, 255, 0.96);
        box-shadow: var(--shadow);
    }

    .nav-open .site-nav {
        display: flex;
    }

    .nav-list {
        flex-direction: column;
        align-items: stretch;
    }

    .nav-link,
    .header-link {
        width: 100%;
    }

    .hero-copy h1,
    .page-hero h1,
    .section-header h2,
    .cta-banner h2 {
        max-width: none;
    }

    .flow-row,
    .process-step,
    .ability-row__title {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    .container {
        width: min(100% - 24px, 1180px);
    }

    .brand {
        gap: 0;
    }

    .brand-mark__image {
        width: 98px;
    }

    .panel,
    .hero-panel,
    .cta-banner {
        padding: 22px;
    }

    .footer-inner,
    .info-card,
    .surface-card,
    .feature-card,
    .detail-card,
    .scenario-card,
    .capability-card,
    .timeline-card {
        padding: 0;
    }

    .section,
    .page-hero {
        padding: 64px 0;
    }

    .hero {
        padding-top: 72px;
    }

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

    .btn {
        width: auto;
    }

    .stack-card {
        grid-template-columns: 1fr;
    }

    .process-board {
        padding: 0;
    }

    .info-card h3,
    .surface-card h3,
    .feature-card h3,
    .detail-card h2,
    .scenario-card h2,
    .capability-card h3,
    .timeline-card h3,
    .flow-row h3,
    .ability-row__title h3,
    .process-step h3 {
        font-size: 24px;
    }

    .footer-inner {
        gap: 10px;
    }
    .footer-brand {
        gap: 12px;
    }
}

.home-hero {
    padding: 86px 0 72px;
}

.home-hero__inner {
    display: grid;
    grid-template-columns: minmax(0, 1.18fr) minmax(300px, 0.82fr);
    gap: 64px;
    align-items: center;
    min-height: clamp(420px, 72vh, 620px);
}

.home-hero__copy {
    display: grid;
    gap: 16px;
    max-width: 700px;
}

.home-hero__copy h1 {
    max-width: 11.5ch;
    font-size: clamp(36px, 4.2vw, 50px);
    line-height: 1.04;
    letter-spacing: -0.05em;
}

.home-hero__lead {
    max-width: 28ch;
    color: var(--ink-soft);
    font-size: 16px;
    line-height: 1.78;
}

.home-hero__actions {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-top: 6px;
}

.home-hero__benefits {
    display: grid;
    gap: 28px;
    align-self: end;
    padding-bottom: 8px;
}

.home-benefit,
.detail-card,
.scenario-card,
.capability-card,
.info-card,
.timeline-card {
    padding-top: 16px;
    border-top: 1px solid var(--line);
}

.home-benefit h2,
.detail-card h2,
.scenario-card h2,
.capability-card h3,
.info-card h3,
.timeline-card h3 {
    margin-top: 10px;
    font-size: 23px;
    line-height: 1.12;
}

.home-benefit p,
.detail-card p,
.scenario-card p,
.capability-card p,
.info-card p,
.timeline-card p {
    margin-top: 6px;
    max-width: 24ch;
    color: var(--ink-soft);
}

.detail-card .bullet-list,
.scenario-card .bullet-list,
.info-card .bullet-list {
    display: grid;
    gap: 8px;
    margin-top: 10px;
    max-width: 30ch;
}

.detail-grid,
.scenario-grid,
.card-grid-3,
.timeline-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 28px;
}

.page-hero {
    padding-top: 56px;
    padding-bottom: 8px;
}

.page-stage {
    padding: 86px 0 72px;
}

.page-stage__inner {
    display: grid;
    grid-template-columns: minmax(0, 1.18fr) minmax(300px, 0.82fr);
    gap: 64px;
    align-items: center;
    min-height: clamp(400px, 70vh, 600px);
}

.page-stage__copy {
    display: grid;
    gap: 16px;
    max-width: 660px;
}

.page-stage__copy h1 {
    max-width: 11.5ch;
    font-size: clamp(34px, 4vw, 48px);
    line-height: 1.06;
    letter-spacing: -0.05em;
}

.page-stage__lead {
    max-width: 28ch;
    color: var(--ink-soft);
    font-size: 16px;
    line-height: 1.78;
}

.page-stage__stack {
    display: grid;
    gap: 28px;
    align-self: end;
    padding-bottom: 8px;
}

.page-stage__item {
    padding-top: 16px;
    border-top: 1px solid var(--line);
}

.page-stage__item h2,
.page-stage__item h3 {
    margin-top: 10px;
    font-size: 23px;
    line-height: 1.12;
}

.page-stage__item p:last-child {
    margin-top: 6px;
    max-width: 24ch;
    color: var(--ink-soft);
}

.page-hero .container {
    display: grid;
    gap: 10px;
}

.page-hero h1 {
    max-width: 12ch;
    font-size: clamp(28px, 3.6vw, 42px);
    line-height: 1.08;
}

.section {
    padding: 56px 0;
}

.section-header {
    gap: 8px;
    margin-bottom: 16px;
}

.section-header h2 {
    max-width: 16ch;
}

.section-note {
    padding-top: 20px;
}

.section-note .section-header {
    margin-bottom: 0;
}

.tag-cloud,
.meta-grid,
.cta-banner {
    display: none;
}

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

.timeline-card__step {
    font-size: 11px;
    letter-spacing: 0.04em;
}

.site-footer {
    padding: 16px 0 24px;
}

.footer-inner {
    gap: 12px 20px;
    padding: 14px 0 0;
    border-top: 1px solid rgba(16, 19, 23, 0.06);
}

.footer-brandline {
    font-size: 13px;
    font-weight: 500;
}

.footer-meta {
    gap: 0;
    font-size: 12px;
}

@media (max-width: 1040px) {
    .home-hero__inner {
        grid-template-columns: 1fr;
        gap: 40px;
        min-height: auto;
    }

    .page-stage__inner {
        grid-template-columns: 1fr;
        gap: 40px;
        min-height: auto;
    }

    .detail-grid,
    .scenario-grid,
    .card-grid-3,
    .timeline-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 640px) {
    .home-hero {
        padding-top: 56px;
        padding-bottom: 48px;
    }

    .home-hero__copy h1 {
        max-width: 9ch;
        font-size: clamp(30px, 9vw, 40px);
    }

    .home-hero__actions {
        margin-top: 2px;
    }

    .page-stage {
        padding: 56px 0 48px;
    }

    .page-stage__copy h1,
    .page-stage__copy h2 {
        max-width: 9ch;
        font-size: clamp(28px, 8.6vw, 38px);
    }

    .detail-grid,
    .scenario-grid,
    .card-grid-3,
    .timeline-grid {
        grid-template-columns: 1fr;
    }

    .page-hero h1,
    .section-header h2 {
        max-width: none;
    }
}

main {
    overflow: clip;
}

.btn {
    min-height: 50px;
    padding: 0 24px;
    border-radius: 999px;
    font-family: var(--font-accent);
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.btn-primary {
    border-color: #ffffff;
    background: #ffffff;
    color: var(--accent-dark);
}

.btn-secondary {
    border: 1px solid rgba(255, 255, 255, 0.18);
    background: transparent;
    color: #ffffff;
}

.site-footer {
    padding: 26px 0 30px;
    background: #03060a;
}

.footer-inner {
    align-items: end;
    gap: 16px 24px;
    padding-top: 18px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-brandline,
.footer-meta,
.footer-brandtag {
    color: rgba(244, 247, 251, 0.76);
}

.footer-brandtag {
    font-family: var(--font-accent);
    letter-spacing: 0.16em;
    text-transform: uppercase;
}

.section {
    position: relative;
    padding: 112px 0;
}

.section--paper {
    background: var(--paper);
    color: var(--paper-ink);
}

.section--dark {
    background:
        radial-gradient(circle at 82% 18%, rgba(149, 161, 179, 0.15), transparent 22%),
        linear-gradient(180deg, #090d13 0%, #04070c 100%);
    color: var(--ink);
}

.section-header {
    gap: 12px;
    margin-bottom: 40px;
}

.section-header--wide {
    max-width: 860px;
}

.section-header--wide h2 {
    max-width: 16ch;
    font-size: var(--type-section);
    font-weight: var(--weight-heading);
    line-height: 1.08;
    letter-spacing: -0.045em;
}

.section-lead {
    max-width: 42ch;
    font-size: 16px;
    line-height: 1.74;
}

.section--paper .section-header h2,
.section--paper .section-lead,
.section--paper h3,
.section--paper p,
.section--paper li {
    color: var(--paper-ink);
}

.section--paper .eyebrow,
.section--paper .card-kicker,
.section--paper .service-chapter__index,
.section--paper .process-line__index {
    color: var(--paper-muted);
}

.section--paper .section-lead,
.section--paper .service-chapter__body p,
.section--paper .service-chapter__meta,
.section--paper .process-line__step p,
.section--paper .bullet-list li {
    color: var(--paper-muted);
}

.section--paper .bullet-list li::before {
    background: var(--paper-ink);
}

.service-groups {
    display: grid;
    gap: 72px;
}

.service-group {
    display: grid;
    gap: 28px;
}

.service-group__head {
    display: grid;
    gap: 12px;
    max-width: 720px;
}

.service-group__head h3 {
    font-size: var(--type-group);
    font-weight: var(--weight-heading);
    line-height: 1.1;
    letter-spacing: -0.04em;
    color: var(--paper-ink);
    text-wrap: balance;
}

.service-group__head p:last-child {
    max-width: 36ch;
    color: var(--paper-muted);
    text-wrap: pretty;
}

.home-hero--orbital,
.page-stage--orbital {
    position: relative;
    overflow: hidden;
    background:
        linear-gradient(180deg, rgba(3, 5, 8, 0.14) 0%, rgba(3, 5, 8, 0.72) 58%, #04070c 100%),
        radial-gradient(circle at 76% 16%, rgba(163, 176, 191, 0.28), transparent 18%),
        linear-gradient(135deg, #1a2029 0%, #0a0f16 48%, #030508 100%);
}

.home-hero--orbital {
    min-height: min(88svh, 820px);
}

.page-stage--orbital {
    min-height: min(94svh, 860px);
}

.home-hero__backdrop,
.page-stage__backdrop {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 68% 22%, rgba(255, 255, 255, 0.08), transparent 10%),
        radial-gradient(circle at 70% 66%, rgba(149, 161, 179, 0.08), transparent 26%),
        repeating-linear-gradient(
            90deg,
            rgba(255, 255, 255, 0.035) 0,
            rgba(255, 255, 255, 0.035) 1px,
            transparent 1px,
            transparent 120px
        );
    opacity: 0.72;
}

.home-hero--orbital::before,
.page-stage--orbital::before {
    position: absolute;
    right: -18vw;
    bottom: -34vw;
    width: 78vw;
    height: 78vw;
    border: 1px solid rgba(255, 255, 255, 0.14);
    border-radius: 50%;
    content: "";
}

.home-hero--orbital::after,
.page-stage--orbital::after {
    position: absolute;
    inset: auto 0 0;
    height: 180px;
    background: linear-gradient(180deg, rgba(5, 8, 13, 0) 0%, rgba(5, 8, 13, 0.82) 100%);
    content: "";
}

.home-hero__inner,
.page-stage__inner {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: minmax(0, 1.16fr) minmax(320px, 0.84fr);
    gap: 72px;
    align-items: end;
    min-height: inherit;
    padding-top: 170px;
    padding-bottom: 88px;
}

.home-hero__inner {
    align-items: center;
    padding-top: 138px;
    padding-bottom: 56px;
}

.home-hero__copy,
.page-stage__copy {
    display: grid;
    gap: 18px;
    max-width: 720px;
}

.home-hero__copy h1,
.page-stage__copy h1,
.page-stage__copy h2 {
    max-width: 12ch;
    font-size: var(--type-hero);
    font-weight: var(--weight-heading);
    line-height: 1.1;
    letter-spacing: -0.02em;
    color: #ffffff;
    text-wrap: balance;
}

.page-stage__copy--services h1 {
    max-width: 12ch;
    font-size: clamp(32px, 3.6vw, 44px);
    line-height: 1.1;
}

.display-line {
    display: block;
}

.home-hero__lead,
.page-stage__lead {
    max-width: 28ch;
    color: rgba(233, 238, 245, 0.7);
    font-size: 16px;
    line-height: 1.68;
    text-wrap: pretty;
}

.home-hero__actions {
    margin-top: 8px;
}

.orbital-rail,
.stage-rail {
    position: relative;
    z-index: 1;
    display: grid;
    gap: 18px;
    align-self: end;
    width: min(468px, 100%);
    margin-left: auto;
    padding: 24px 0 0;
    border-top: 1px solid rgba(255, 255, 255, 0.16);
}

.orbital-rail .card-kicker,
.stage-rail .card-kicker {
    color: rgba(244, 247, 251, 0.52);
}

.orbital-rail__item {
    display: grid;
    grid-template-columns: 52px 1fr;
    gap: 18px;
    padding-top: 18px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.stage-rail__item {
    display: grid;
    gap: 10px;
    padding-top: 18px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.orbital-rail__item span {
    font-family: var(--font-accent);
    font-size: 24px;
    font-weight: var(--weight-accent);
    letter-spacing: 0.08em;
    color: rgba(244, 247, 251, 0.44);
}

.orbital-rail__item h2,
.stage-rail__item h2,
.stage-rail__item h3 {
    font-size: 22px;
    font-weight: var(--weight-heading);
    line-height: 1.12;
    color: #ffffff;
    text-wrap: balance;
}

.orbital-rail__item p:last-child,
.stage-rail__item p:last-child {
    margin-top: 6px;
    max-width: 28ch;
    color: rgba(233, 238, 245, 0.62);
    text-wrap: pretty;
}

.hero-trace {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
    padding-bottom: 18px;
}

.hero-trace span {
    padding-top: 16px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-family: var(--font-accent);
    font-size: 13px;
    font-weight: var(--weight-accent);
    letter-spacing: 0.16em;
    color: rgba(244, 247, 251, 0.42);
    text-transform: uppercase;
}

.service-chapters {
    border-top: 1px solid var(--paper-line);
}

.service-chapter {
    display: grid;
    grid-template-columns: 84px minmax(0, 1fr) 280px;
    gap: 32px;
    align-items: start;
    padding: 30px 0;
    border-bottom: 1px solid var(--paper-line);
}

.service-chapter__index,
.process-line__index {
    font-family: var(--font-accent);
    font-size: 24px;
    font-weight: var(--weight-accent);
    letter-spacing: 0.08em;
}

.service-chapter__body h3,
.scope-cluster h3 {
    font-size: var(--type-item);
    font-weight: var(--weight-heading);
    line-height: 1.1;
    letter-spacing: -0.04em;
    text-wrap: balance;
}

.process-line__step h3 {
    font-size: var(--type-process);
    font-weight: var(--weight-heading);
    line-height: 1.14;
    letter-spacing: -0.03em;
    text-wrap: balance;
}

.service-chapter__body p {
    margin-top: 10px;
    max-width: 34ch;
    font-size: 16px;
    line-height: 1.72;
    text-wrap: pretty;
}

.service-chapter__meta {
    justify-self: end;
    max-width: 22ch;
    padding-top: 6px;
    font-family: var(--font-accent);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    text-wrap: balance;
}

.scope-clusters {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 32px;
}

.scope-cluster {
    padding-top: 22px;
    border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.scope-clusters--paper .scope-cluster {
    border-top-color: var(--paper-line);
}

.scope-cluster .card-kicker {
    margin-bottom: 10px;
    color: rgba(244, 247, 251, 0.5);
}

.scope-clusters--paper .card-kicker {
    color: var(--paper-muted);
}

.scope-cluster .bullet-list {
    display: grid;
    gap: 10px;
    margin-top: 18px;
}

.scope-cluster .bullet-list li {
    color: rgba(233, 238, 245, 0.72);
    text-wrap: pretty;
}

.process-line {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 28px;
    border-top: 1px solid var(--paper-line);
}

.section--dark .process-line {
    border-top-color: rgba(255, 255, 255, 0.12);
}

.process-line__step {
    display: grid;
    gap: 14px;
    padding-top: 24px;
}

.process-line__step p {
    max-width: 20ch;
    margin-top: 0;
    font-size: 15px;
    line-height: 1.72;
    text-wrap: pretty;
}

[data-reveal] {
    opacity: 0;
    transform: translateY(28px);
    transition:
        opacity 680ms ease-out,
        transform 680ms ease-out;
}

[data-reveal].is-visible {
    opacity: 1;
    transform: none;
}

@media (max-width: 1040px) {
    .home-hero__inner,
    .page-stage__inner,
    .service-groups,
    .scope-clusters,
    .process-line {
        grid-template-columns: 1fr;
    }

    .orbital-rail,
    .stage-rail {
        width: 100%;
        margin-left: 0;
    }

    .hero-trace,
    .service-chapter {
        grid-template-columns: 1fr;
    }

    .service-chapter__meta {
        justify-self: start;
        max-width: none;
        padding-top: 0;
    }
}

@media (max-width: 860px) {
    .site-header {
        padding-top: 0;
        background: rgba(5, 8, 13, 0.92);
    }

    .header-inner {
        border-radius: 0;
    }

    .site-nav {
        border-color: rgba(255, 255, 255, 0.1);
        border-radius: 18px;
        background: rgba(5, 8, 13, 0.96);
        box-shadow: var(--shadow);
    }

    .nav-link {
        color: rgba(244, 247, 251, 0.78);
    }
}

@media (max-width: 640px) {
    .container {
        width: min(1280px, calc(100% - 32px));
    }

    .section {
        padding: 84px 0;
    }

    .home-hero__inner,
    .page-stage__inner {
        gap: 40px;
        padding-top: 136px;
        padding-bottom: 60px;
    }

    .home-hero__inner {
        padding-top: 120px;
        padding-bottom: 44px;
    }

.home-hero__copy h1,
.page-stage__copy h1,
.page-stage__copy h2 {
        font-size: clamp(32px, 10vw, 42px);
        max-width: 9ch;
        line-height: 1.08;
    }

    .page-stage__copy--services h1 {
        max-width: 8.8ch;
        font-size: clamp(28px, 8.8vw, 38px);
        line-height: 1.08;
    }

    .hero-trace {
        gap: 12px;
        padding-bottom: 20px;
    }

    .hero-trace span {
        font-size: 12px;
    }

    .orbital-rail__item,
    .stage-rail__item {
        grid-template-columns: 1fr;
        gap: 10px;
    }

    .service-group__head h3,
    .scope-cluster h3 {
        font-size: 24px;
    }

    .section-header--wide h2 {
        max-width: 11ch;
        font-size: clamp(26px, 7vw, 32px);
        line-height: 1.08;
    }

    .service-chapter__body h3 {
        font-size: 24px;
    }

    .process-line__step h3 {
        font-size: 21px;
    }
}

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

    [data-reveal] {
        opacity: 1;
        transform: none;
        transition: none;
    }
}