/* Hallmark · macrostructure: Split Studio · H2 knobs: ratio=54/46, right-side=photo, divider=negative-space
 * theme: custom · vibe: "冷静观测、精密仪器、真实证据" · paper: oklch(98.5% 0.008 250) · accent: oklch(48% 0.170 250)
 * display: Space Grotesk · body: Inter · axes: light / geometric-sans / cool-blue
 * enrichment: E8 Hero Photography · nav: N1b · feature-proof: alternating Split Studio + F3 · secondary-cta: C1 · footer: Ft2
 * pre-emit critique: P5 H5 E5 S5 R5 V4 · studied: no · context: user-provided · v1.1.0
 */

*,
*::before,
*::after {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    overflow-x: clip;
}

html {
    scroll-behavior: smooth;
}

body {
    background: var(--color-paper);
    color: var(--color-ink-2);
    font-family: var(--font-body);
    font-size: var(--text-base);
    line-height: var(--leading-body);
}

[hidden] {
    display: none !important;
}

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

h1,
h2,
h3 {
    min-width: 0;
    margin: 0;
    color: var(--color-ink);
    font-family: var(--font-display);
    font-style: normal;
    line-height: var(--leading-heading);
    overflow-wrap: anywhere;
}

h1 {
    max-width: 10ch;
    font-size: var(--text-display);
    font-weight: 600;
    letter-spacing: -0.035em;
}

h2 {
    font-size: var(--text-2xl);
    font-weight: 600;
    letter-spacing: -0.025em;
}

h3 {
    font-size: var(--text-xl);
    font-weight: 600;
    letter-spacing: -0.015em;
}

p {
    max-width: var(--measure);
}

a {
    color: inherit;
    text-decoration-color: var(--color-rule);
    text-decoration-thickness: var(--rule-thin);
    text-underline-offset: var(--rule-strong);
}

button {
    color: inherit;
    font: inherit;
}

.site-nav,
.split-studio,
.feature-proof,
.downloads,
.quick-start,
.site-footer {
    width: 100%;
    margin-inline: auto;
    padding-inline: var(--space-xl);
}

.site-nav,
.split-studio {
    max-width: var(--page-max);
}

.feature-proof,
.downloads,
.quick-start,
.site-footer {
    max-width: var(--content-max);
}

.site-header {
    position: sticky;
    z-index: 20;
    top: 0;
    color: var(--color-ink);
}

.site-header.is-scrolled {
    border-bottom: var(--rule-thin) solid var(--color-rule-2);
    background: var(--color-paper);
    color: var(--color-ink);
}

.site-nav {
    display: grid;
    min-height: 72px;
    grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
    align-items: center;
    gap: var(--space-lg);
}

.site-nav > *,
.split-studio > *,
.section-intro > *,
.proof > *,
.release-table-head > *,
.release-row > *,
.release-row dl > *,
.quick-start > * {
    min-width: 0;
}

.wordmark {
    display: inline-flex;
    min-width: 0;
    min-height: 44px;
    align-items: center;
    justify-self: start;
    gap: var(--space-xs);
    color: var(--color-ink);
    font-family: var(--font-display);
    font-weight: 600;
    text-decoration: none;
    white-space: nowrap;
}

.wordmark img {
    flex: 0 0 auto;
    border-radius: var(--radius-control);
}

.desktop-nav {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xl);
}

.desktop-nav a,
.mobile-menu a,
.site-footer a {
    display: inline-flex;
    min-width: 44px;
    min-height: 44px;
    align-items: center;
    justify-content: center;
    color: var(--color-ink-2);
    font-size: var(--text-sm);
    text-decoration-color: var(--color-rule);
    white-space: nowrap;
}

.nav-actions {
    display: flex;
    min-width: 0;
    align-items: center;
    justify-content: flex-end;
    gap: var(--space-sm);
}

.language-switch {
    display: inline-flex;
    border: var(--rule-thin) solid var(--color-rule);
    border-radius: var(--radius-control);
}

.language-switch button,
.site-footer button {
    min-width: 44px;
    min-height: 44px;
    border: 0;
    background: var(--color-paper);
    color: var(--color-ink-2);
    cursor: pointer;
}

.language-switch button[aria-pressed="true"] {
    background: var(--color-paper-3);
    color: var(--color-ink);
}

.button,
.menu-trigger,
.checksum-copy,
.download-link {
    display: inline-flex;
    min-width: 44px;
    min-height: 44px;
    align-items: center;
    justify-content: center;
    border: var(--rule-thin) solid var(--color-rule);
    border-radius: var(--radius-control);
    padding: var(--space-xs) var(--space-md);
    background: var(--color-paper);
    color: var(--color-ink);
    cursor: pointer;
    font-weight: 500;
    line-height: 1;
    text-align: center;
    text-decoration: none;
    white-space: nowrap;
}

.button--primary {
    border-color: var(--color-accent);
    background: var(--color-accent);
    color: var(--color-accent-ink);
}

.button--quiet {
    min-height: 44px;
    border-color: var(--color-rule);
    padding-inline: var(--space-sm);
    background: var(--color-paper);
    color: var(--color-ink);
}

.menu-trigger {
    display: none;
}

.mobile-menu {
    position: absolute;
    z-index: 22;
    inset-inline: var(--space-xl);
    top: calc(100% + var(--space-xs));
    border-block: var(--rule-thin) solid var(--color-rule);
    padding-block: var(--space-md);
    background: var(--color-paper);
    color: var(--color-ink);
}

.mobile-menu a {
    justify-content: flex-start;
    padding-inline: var(--space-md);
}

.mobile-menu .button {
    margin: var(--space-sm) var(--space-md) 0;
    justify-content: center;
}

.menu-overlay {
    position: fixed;
    z-index: 21;
    inset: 0;
    width: 100%;
    min-width: 44px;
    min-height: 44px;
    border: 0;
    background: var(--color-paper-3);
    color: var(--color-ink);
    cursor: pointer;
    opacity: 0.72;
}

.skip-link {
    position: fixed;
    z-index: 40;
    inset-block-start: var(--space-sm);
    inset-inline-start: var(--space-sm);
    min-width: 44px;
    min-height: 44px;
    padding: var(--space-xs) var(--space-md);
    background: var(--color-ink);
    color: var(--color-paper);
    transform: translateY(-200%);
    white-space: nowrap;
}

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

.split-studio {
    display: grid;
    min-height: clamp(620px, 62svh, 920px);
    grid-template-columns: minmax(0, 54fr) minmax(0, 46fr);
    gap: var(--space-3xl);
    padding-block: var(--space-3xl) var(--space-4xl);
}

.hero__copy {
    display: flex;
    min-width: 0;
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
}

.hero__lede {
    margin-block: var(--space-lg) 0;
    font-size: var(--text-lg);
}

.recommendation {
    margin-block: var(--space-lg) 0;
    color: var(--color-muted);
    font-family: var(--font-mono);
    font-size: var(--text-sm);
}

.hero__actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-sm);
    margin-block-start: var(--space-xl);
}

.hero__figure {
    display: grid;
    min-width: 0;
    min-height: 0;
    grid-template-rows: minmax(0, 1fr) auto;
    align-self: stretch;
    margin: 0;
    border-top: var(--rule-thin) solid var(--color-rule);
}

.hero__figure img {
    width: 100%;
    height: 100%;
    border-radius: var(--radius-image);
    object-fit: cover;
    opacity: 0;
    animation: hero-image-in var(--dur-image) var(--ease-out) forwards;
}

.hero__figure figcaption,
.proof__visual figcaption {
    padding-block-start: var(--space-xs);
    color: var(--color-muted);
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    overflow-wrap: anywhere;
}

@keyframes hero-image-in {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

.feature-proof,
.downloads,
.quick-start {
    padding-block: var(--space-section);
}

.feature-proof {
    padding-block-start: var(--space-xs);
}

.section-intro {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: var(--space-2xl);
    align-items: end;
    margin-block-end: var(--space-3xl);
}

.section-intro p {
    margin: 0;
    justify-self: end;
}

.proof {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: var(--space-3xl);
    align-items: center;
    padding-block: var(--space-3xl);
    border-top: var(--rule-thin) solid var(--color-rule);
}

.proof:nth-of-type(even) .proof__copy {
    order: 2;
}

.proof:nth-of-type(even) .proof__visual,
.proof:nth-of-type(even) .data-flow,
.proof:nth-of-type(even) .record-fields {
    order: 1;
}

.proof__copy p {
    margin-block: var(--space-md) 0;
}

.proof__visual {
    min-width: 0;
    margin: 0;
    border-top: var(--rule-thin) solid var(--color-rule);
}

.proof__visual img {
    width: 100%;
    border-radius: var(--radius-image);
}

.data-flow,
.record-fields {
    display: grid;
    min-width: 0;
    margin: 0;
    border-block: var(--rule-thin) solid var(--color-rule);
    padding: 0;
    list-style: none;
}

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

.data-flow li {
    position: relative;
    display: grid;
    min-width: 0;
    min-height: 112px;
    place-items: center;
    padding: var(--space-md);
    color: var(--color-ink);
    font-size: var(--text-xs);
    text-align: center;
    overflow-wrap: anywhere;
}

.data-flow li + li {
    border-inline-start: var(--rule-thin) solid var(--color-rule);
}

.data-flow li:not(:last-child)::after {
    position: absolute;
    z-index: 1;
    inset-block-start: 50%;
    inset-inline-end: calc(var(--space-xs) * -1);
    width: var(--space-md);
    border-top: var(--rule-thin) solid var(--color-accent);
    content: "";
}

.record-fields {
    grid-template-columns: repeat(5, minmax(0, 1fr));
}

.record-fields li {
    min-width: 0;
    padding: var(--space-lg) var(--space-sm);
    color: var(--color-ink);
    font-size: var(--text-xs);
    text-align: center;
    overflow-wrap: anywhere;
}

.record-fields li + li {
    border-inline-start: var(--rule-thin) solid var(--color-rule);
}

.downloads {
    border-top: var(--rule-thin) solid var(--color-rule);
}

.release-table-head,
.release-row {
    display: grid;
    grid-template-columns:
        minmax(0, 0.8fr)
        minmax(0, 0.75fr)
        minmax(0, 0.65fr)
        minmax(0, 0.65fr)
        minmax(0, 1.55fr)
        minmax(0, 0.65fr)
        minmax(0, 1.45fr)
        minmax(0, 0.9fr);
    gap: var(--space-md);
    align-items: center;
}

.release-table-head {
    padding-block: var(--space-sm);
    border-block: var(--rule-thin) solid var(--color-rule);
    color: var(--color-muted);
    font-size: var(--text-xs);
}

.release-table-head > * {
    overflow-wrap: anywhere;
}

.release-row {
    min-width: 0;
    padding-block: var(--space-lg);
    border-bottom: var(--rule-thin) solid var(--color-rule);
}

.release-row h3 {
    font-size: var(--text-base);
}

.release-row dl,
.release-row dl > div {
    display: contents;
}

.release-row dt {
    display: none;
}

.release-row dd {
    min-width: 0;
    margin: 0;
    font-size: var(--text-sm);
    overflow-wrap: anywhere;
}

.release-row dd:nth-of-type(6),
.release-row dd[data-sha256],
.release-row [data-sha256] {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    overflow-wrap: anywhere;
}

.release-status {
    color: var(--color-muted);
    font-size: var(--text-sm);
}

.release-row[data-status="available"] .release-status {
    color: var(--color-success);
}

.release-row.is-error {
    border-color: var(--color-error);
}

.release-row.is-success {
    border-color: var(--color-success);
}

.release-list > .is-loading {
    cursor: wait;
}

.quick-start {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: var(--space-3xl);
    border-top: var(--rule-thin) solid var(--color-rule);
}

.quick-start ol {
    margin: 0;
    padding-inline-start: var(--space-lg);
}

.quick-start li + li {
    margin-block-start: var(--space-sm);
}

.noscript-note {
    max-width: var(--content-max);
    margin: 0 auto;
    border-block: var(--rule-thin) solid var(--color-error);
    padding: var(--space-md) var(--space-xl);
    color: var(--color-error);
}

.site-footer {
    display: flex;
    min-height: 72px;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-xs);
    border-top: var(--rule-thin) solid var(--color-rule);
    color: var(--color-muted);
    font-size: var(--text-xs);
}

.site-footer > * {
    white-space: nowrap;
}

.footer-wordmark {
    color: var(--color-ink);
    font-family: var(--font-display);
    font-weight: 600;
}

.site-footer button {
    padding-inline: var(--space-sm);
}

.button,
.wordmark,
button,
.menu-trigger,
.language-switch button,
.site-footer button,
.desktop-nav a,
.mobile-menu a,
.site-footer a,
.checksum-copy,
.download-link {
    transition:
        color var(--dur-base) var(--ease-out),
        text-decoration-color var(--dur-base) var(--ease-out),
        opacity var(--dur-base) var(--ease-out),
        transform var(--dur-fast) var(--ease-out);
}

@media (hover: hover) and (pointer: fine) {
    .button:hover,
    .wordmark:hover,
    button:hover,
    .menu-trigger:hover,
    .language-switch button:hover,
    .site-footer button:hover,
    .desktop-nav a:hover,
    .mobile-menu a:hover,
    .site-footer a:hover,
    .checksum-copy:hover,
    .download-link:hover {
        color: var(--color-accent);
        text-decoration-color: var(--color-accent);
    }

    .button--primary:hover {
        color: var(--color-accent-ink);
        opacity: 0.86;
    }
}

.skip-link:focus-visible,
.button:focus-visible,
.wordmark:focus-visible,
button:focus-visible,
.menu-trigger:focus-visible,
.language-switch button:focus-visible,
.site-footer button:focus-visible,
.desktop-nav a:focus-visible,
.mobile-menu a:focus-visible,
.site-footer a:focus-visible,
.checksum-copy:focus-visible,
.download-link:focus-visible {
    outline: var(--rule-strong) solid var(--color-focus);
    outline-offset: var(--space-2xs);
}

.skip-link:active,
.button:active,
.wordmark:active,
button:active,
.menu-trigger:active,
.language-switch button:active,
.site-footer button:active,
.desktop-nav a:active,
.mobile-menu a:active,
.site-footer a:active,
.checksum-copy:active,
.download-link:active {
    transform: translateY(1px);
}

.button:disabled,
button:disabled,
.button[aria-disabled="true"],
button[aria-disabled="true"],
.download-link[aria-disabled="true"],
.checksum-copy[aria-disabled="true"] {
    border-color: var(--color-rule);
    background: var(--color-paper-3);
    color: var(--color-muted);
    cursor: not-allowed;
    opacity: 0.72;
    transform: none;
}

.is-loading {
    cursor: wait;
}

.is-error {
    border-color: var(--color-error);
    color: var(--color-error);
    outline: var(--rule-thin) solid var(--color-error);
    outline-offset: var(--space-2xs);
}

.button--primary.is-error {
    border-color: var(--color-accent);
    color: var(--color-accent-ink);
    outline: none;
}

.button--primary.is-error:focus-visible {
    outline: var(--rule-strong) solid var(--color-focus);
    outline-offset: var(--space-2xs);
}

.is-success {
    border-color: var(--color-success);
    color: var(--color-success);
    outline: var(--rule-thin) solid var(--color-success);
    outline-offset: var(--space-2xs);
}

.state-message {
    display: none;
    margin-inline-start: var(--space-xs);
    font-size: var(--text-xs);
    overflow-wrap: anywhere;
}

.is-loading .state-message,
.is-error .state-message,
.is-success .state-message,
.is-loading + .state-message,
.is-error + .state-message,
.is-success + .state-message {
    display: inline;
}

@media (max-width: 960px) {
    .split-studio,
    .section-intro,
    .proof,
    .quick-start {
        grid-template-columns: minmax(0, 1fr);
    }

    .split-studio {
        min-height: 0;
        gap: var(--space-2xl);
    }

    .hero__copy {
        padding-block: var(--space-2xl);
    }

    .hero__figure {
        min-height: 0;
    }

    .hero__figure img {
        height: auto;
        object-fit: contain;
    }

    .section-intro p {
        justify-self: start;
    }

    .proof:nth-of-type(even) .proof__copy,
    .proof:nth-of-type(even) .proof__visual,
    .proof:nth-of-type(even) .data-flow,
    .proof:nth-of-type(even) .record-fields {
        order: initial;
    }
}

@media (max-width: 760px) {
    .site-nav {
        grid-template-columns: minmax(0, 1fr) auto;
    }

    .desktop-nav,
    .desktop-download,
    .release-table-head {
        display: none;
    }

    .menu-trigger {
        display: inline-flex;
    }

    .mobile-menu:not([hidden]) {
        display: grid;
    }

    .release-row {
        display: block;
        padding-block: var(--space-xl);
    }

    .release-row dl {
        display: block;
        margin-block: var(--space-lg);
    }

    .release-row dl > div {
        display: grid;
        min-width: 0;
        grid-template-columns: minmax(0, 0.7fr) minmax(0, 1.3fr);
        gap: var(--space-md);
        padding-block: var(--space-xs);
        border-top: var(--rule-thin) solid var(--color-rule-2);
    }

    .release-row dt {
        display: block;
        color: var(--color-muted);
        font-size: var(--text-xs);
    }

    .release-row dd {
        text-align: end;
    }

    .release-status,
    .download-link {
        display: inline-flex;
        min-width: 44px;
        min-height: 44px;
        align-items: center;
    }

    .site-footer {
        align-content: center;
        padding-block: var(--space-md);
    }
}

@media (max-width: 414px) {
    .site-nav,
    .split-studio,
    .feature-proof,
    .downloads,
    .quick-start,
    .site-footer {
        padding-inline: var(--space-md);
    }

    .mobile-menu {
        inset-inline: var(--space-md);
    }

    .language-switch {
        display: none;
    }

    .data-flow,
    .record-fields {
        grid-template-columns: minmax(0, 1fr);
    }

    .data-flow li + li,
    .record-fields li + li {
        border-block-start: var(--rule-thin) solid var(--color-rule);
        border-inline-start: 0;
    }

    .data-flow li:not(:last-child)::after {
        display: none;
    }
}

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

    *,
    *::before,
    *::after {
        animation-duration: var(--dur-fast);
        animation-iteration-count: 1;
        transition-duration: var(--dur-fast);
    }

    .hero__figure img {
        animation-duration: var(--dur-fast);
    }

    .skip-link:active,
    .button:active,
    .wordmark:active,
    button:active,
    .menu-trigger:active,
    .language-switch button:active,
    .site-footer button:active,
    .desktop-nav a:active,
    .mobile-menu a:active,
    .site-footer a:active,
    .checksum-copy:active,
    .download-link:active {
        transform: none;
    }
}