@font-face { font-family: Barlow; src: url("assets/Barlow-Regular.ttf") format("truetype"); font-weight: 400; font-display: swap; }
@font-face { font-family: Barlow; src: url("assets/Barlow-SemiBold.ttf") format("truetype"); font-weight: 600 900; font-display: swap; }
@font-face { font-family: RoundDisplay; src: url("assets/NotoSansSC-display.woff2") format("woff2"); font-weight: 900; font-display: swap; }

:root {
  color-scheme: light;
  --bg: #f4f5f5;
  --ink: #18191b;
  --muted: #666970;
  --red: #e54330;
  --rule: #dadcde;
  --dark: #131416;
  --font: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", system-ui, sans-serif;
  --gutter: clamp(24px, 6.8vw, 100px);
  --motion-fast: 180ms;
  --motion-ease: cubic-bezier(.22, 1, .36, 1);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 32px; }
body { margin: 0; background: var(--bg); color: var(--ink); font-family: var(--font); font-size: 16px; line-height: 1.7; -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
button, a { -webkit-tap-highlight-color: transparent; }
a:focus-visible, button:focus-visible { outline: 3px solid var(--red); outline-offset: 6px; }
button:disabled { cursor: default; }
svg { display: block; flex-shrink: 0; }
figure, h1, h2, h3, p, dl, dd { margin: 0; }
.wrap { width: min(1280px, calc(100% - var(--gutter) * 2)); margin-inline: auto; }
.red { color: var(--red); }
.mono { font-family: Barlow, ui-monospace, monospace; }
.arrow { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.skip-link { position: absolute; top: 12px; left: 12px; z-index: 2; padding: 8px 16px; background: white; transform: translateY(-150%); }
.skip-link:focus { transform: translateY(0); }

.site-header { min-height: 80px; display: flex; justify-content: space-between; align-items: center; gap: 32px; border-bottom: 1px solid var(--rule); }
.brand { display: inline-flex; align-items: center; gap: 16px; font: 600 30px/1 Barlow, var(--font); letter-spacing: -.035em; white-space: nowrap; }
.site-header nav { display: flex; align-items: center; gap: clamp(24px, 3.6vw, 52px); }
.site-header nav a { font-size: 15px; font-weight: 600; }
.site-header nav a:hover { color: var(--red); }
.language-switch { white-space: nowrap; }
html[lang="en"] { --font: Barlow, system-ui, sans-serif; }
html[lang="en"] h1 { font-family: var(--font); font-size: clamp(52px, 6.1vw, 90px); line-height: 1.08; letter-spacing: -.045em; }
html[lang="en"] .section-lead h2 { font-family: var(--font); line-height: 1.1; letter-spacing: -.04em; }
.github-link { display: inline-flex; align-items: center; gap: 6px; }
.github-link .arrow { width: 14px; height: 14px; }

.hero { display: grid; grid-template-columns: 1.05fr 1fr; gap: 70px; align-items: center; padding-block: 64px 48px; }
h1 { font-family: RoundDisplay, var(--font); font-size: clamp(54px, 7vw, 104px); font-weight: 900; line-height: 1.24; letter-spacing: -.075em; }
.hero-copy > p { margin-top: 32px; font-size: clamp(16px, 1.55vw, 22px); line-height: 1.9; color: #5c5e64; }
.actions { display: flex; align-items: center; flex-wrap: wrap; gap: 40px; margin-top: 44px; }
.button { min-height: 64px; display: inline-flex; align-items: center; justify-content: center; gap: 28px; padding: 14px 32px; border: 1px solid var(--ink); border-radius: 4px; background: var(--ink); color: white; font-size: 18px; font-weight: 600; line-height: 1.5; }
.button:hover { background: #35373a; border-color: #35373a; transform: translateY(-2px); }
.text-link { padding-block: 6px; border-bottom: 1px solid currentColor; font-size: 16px; font-weight: 600; }
.text-link:hover { color: var(--red); }
.hero-visual { display: flex; flex-direction: column; align-items: center; padding-top: 14px; }
.hero-orbit { width: min(100%, 480px); position: relative; border: 18px solid #e5e7e8; border-radius: 50%; }
.hero-orbit::after { position: absolute; top: 3%; right: 10%; content: ""; width: 20px; height: 20px; background: var(--red); border: 4px solid var(--bg); box-sizing: content-box; border-radius: 50%; }
.native-screen { position: relative; width: 100%; aspect-ratio: 1; overflow: hidden; border-radius: 50%; background: #000; }
/* Contact-sheet coordinates from render_watchface_review.py. Keep the native pixels;
   crop only the web viewport, never redraw firmware UI or alter source artwork. */
.native-sheet { position: absolute; width: 360.515021%; max-width: none; height: auto; left: var(--crop-x); top: var(--crop-y); }
/* 独立原生图保留完整466px内容，不沿用合辑裁切。 / Keep standalone native faces complete, without contact-sheet cropping. */
.native-face { display: block; width: 100%; height: 100%; object-fit: contain; }
.hero-screen { box-shadow: 0 24px 32px -20px #0005; }
.hero-visual figcaption { display: grid; gap: 2px; text-align: center; margin-top: 30px; font-size: 13px; color: #7a7e84; }
.hero-visual figcaption .mono { color: var(--ink); font-size: 14px; font-weight: 600; letter-spacing: .14em; }
.spec-strip { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--rule); padding-block: 30px 42px; }
.spec-strip > div { text-align: center; padding-inline: 10px; }
.spec-strip > div + div { border-left: 1px solid var(--rule); }
.spec-strip dt { font: 600 clamp(26px, 2.6vw, 38px)/1.4 Barlow, var(--font); letter-spacing: -.015em; }
.spec-strip dd { margin-top: 2px; font-size: 15px; color: var(--muted); }

.showcase { padding-block: 64px 56px; background: var(--dark); color: #f4f4f3; }
.section-lead { display: flex; justify-content: space-between; align-items: flex-end; gap: 48px; }
h2 { font-size: clamp(36px, 4.7vw, 70px); font-weight: 700; line-height: 1.3; letter-spacing: -.055em; }
.section-lead > p { font-size: clamp(17px, 1.55vw, 22px); line-height: 1.85; color: #a7a9af; padding-bottom: 10px; }
.face-explorer { display: grid; grid-template-columns: 1fr 1.2fr; gap: 90px; align-items: center; margin-top: 50px; }
.face-visual { display: flex; justify-content: center; }
.face-controls { min-width: 0; }
.explorer-screen { max-width: 460px; outline: 1px solid #333538; outline-offset: 1px; }
.theme-picker { display: flex; flex-wrap: wrap; gap: 16px 28px; border-bottom: 1px solid #393b40; }
.theme-picker button { position: relative; border: 0; padding: 0 0 14px; background: none; color: #93969d; font: 400 19px/1.4 Barlow, sans-serif; letter-spacing: .04em; }
.theme-picker button[aria-pressed="true"] { color: #fff; font-weight: 600; }
.theme-picker button[aria-pressed="true"]::after { content: ""; position: absolute; height: 2px; background: #f4f4f3; bottom: -1px; left: 0; right: 0; }
.theme-picker button:not(:disabled):hover { color: #f4f4f3; }
.theme-picker button:disabled { color: #666a72; cursor: not-allowed; }
.face-description { padding-top: 38px; min-height: 150px; }
.face-description h3 { font: 600 56px/1.15 Barlow, sans-serif; letter-spacing: -.035em; }
.face-description p { margin-top: 10px; font-size: 19px; color: #a7a9af; }
.kind-picker { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 10px; }
.kind-picker button { min-width: 0; padding: 8px 5px; border: 1px solid transparent; border-radius: 6px; background: transparent; color: #9699a0; font-size: 12px; font-weight: 500; line-height: 1.6; }
.kind-picker button > span:last-child { display: block; margin-top: 10px; overflow-wrap: anywhere; }
.kind-picker .native-screen { display: block; width: 100%; outline: 1px solid #333538; }
.kind-picker button[aria-pressed="true"] { background: #24262a; border-color: #65696f; color: #fff; }
.kind-picker button:hover { background: #24262a; color: #fff; }
.face-pagination { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-top: 20px; color: #9699a0; }
.face-pagination[hidden] { display: none; }
.face-pagination > .mono { font-size: 13px; letter-spacing: .14em; }
.face-pagination > div { display: flex; gap: 10px; }
.face-pagination button, .collection-close { display: grid; place-items: center; width: 44px; height: 44px; border: 1px solid #45474c; border-radius: 50%; background: transparent; color: #dedee0; }
.face-pagination button:disabled { opacity: .25; }
.face-pagination button:not(:disabled):hover, .collection-close:hover { border-color: #dedee0; }
.face-pagination svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 1.5; }
.face-pagination .face-playback { display: flex; gap: 7px; width: auto; padding-inline: 14px; border-radius: 24px; font-size: 12px; }
.face-playback svg { width: 14px; height: 14px; }
.face-pagination [hidden], .face-playback-progress[hidden] { display: none; }
.face-playback-progress { height: 2px; margin-top: 16px; overflow: hidden; background: #2a2c30; }
.face-playback-progress > span { display: block; height: 100%; background: var(--red); transform: scaleX(0); transform-origin: left; }
.preview-note { margin-top: 28px; font-size: 12px; color: #9699a0; }
.preview-note + .preview-note { margin-top: 10px; }
.preview-note a { text-decoration: underline; text-underline-offset: 3px; }
.preview-error { margin-top: 12px; font-size: 13px; color: #ffad9f; }
.face-state { display: inline-block; margin-top: 12px; color: #d5c39a; font-size: 12px; }
.face-description h3 { font-size: clamp(28px, 3.5vw, 48px); }
.face-description { padding-bottom: 24px; }
.face-collection { margin-top: 48px; border-top: 1px solid #393b40; }
.collection-trigger { display: flex; justify-content: space-between; align-items: center; gap: 24px; padding-block: 28px; cursor: pointer; list-style: none; }
.collection-trigger::-webkit-details-marker { display: none; }
.collection-trigger:focus-visible { outline: 3px solid var(--red); outline-offset: 6px; }
.collection-trigger strong { display: block; font-size: clamp(20px, 2.3vw, 28px); font-weight: 500; }
.collection-trigger > span > span { display: block; margin-top: 6px; color: #9699a0; font-size: 13px; }
.collection-trigger-action { display: inline-flex; align-items: center; gap: 24px; flex-shrink: 0; color: #f4f4f3; font-size: 14px; }
.collection-trigger:hover .collection-trigger-action { color: #ff8272; }
.collection-panel { padding-block: 24px; }
.collection-heading { display: flex; align-items: start; justify-content: space-between; gap: 24px; margin-bottom: 24px; }
.collection-heading h3 { font-size: clamp(26px, 3vw, 36px); font-weight: 500; line-height: 1.3; }
.collection-heading p { margin-top: 10px; color: #a7a9af; font-size: 14px; }
.collection-close { flex-shrink: 0; }
.collection-filters { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 32px; }
.collection-filters button { border: 1px solid #45474c; background: transparent; border-radius: 24px; padding: 10px 16px; color: #b6b8bd; font-size: 13px; }
.collection-filters button[aria-pressed="true"] { color: #191a1d; border-color: #e1e1d9; background: #e1e1d9; }
.face-group + .face-group { margin-top: 36px; }
.face-group-heading { display: flex; gap: 16px; align-items: baseline; margin-bottom: 18px; }
.face-group-heading h4 { font: 500 17px/1.3 Barlow, sans-serif; letter-spacing: .1em; }
.face-group-heading span { color: #7d838a; font: 400 12px/1.3 Barlow, sans-serif; }
.face-grid { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 24px 18px; }
.face-card { min-width: 0; padding: 12px 8px; border: 1px solid transparent; border-radius: 12px; background: transparent; color: #dedee0; }
.face-card:hover { background: #24262a; }
.face-card[aria-pressed="true"] { border-color: #92978c; background: #24262a; }
.face-card .native-screen { display: block; width: 100%; aspect-ratio: 1; outline: 1px solid #333538; }
.face-card-name { display: block; margin-top: 14px; font-size: 13px; line-height: 1.6; }
.face-card-status { display: block; margin-top: 4px; font-size: 10px; color: #d5c39a; }
.face-collection [hidden], .face-dialog [hidden] { display: none; }
/* 完整图鉴只占自己的滚动区，不拉长首页；原生dialog保留焦点与关闭行为。
   The full library scrolls independently; native dialog keeps focus and dismissal behavior. */
html.face-library-open { overflow: hidden; }
.face-dialog { width: min(1100px, calc(100% - 64px)); max-height: calc(100dvh - 64px); padding: 0; border: 1px solid #393b40; border-radius: 14px; background: var(--dark); color: #f4f4f3; color-scheme: dark; overflow: auto; overscroll-behavior: contain; }
.face-dialog::backdrop { background: #000b; }
.face-dialog .collection-panel { padding: 36px; }
.face-dialog .collection-heading { position: sticky; top: -1px; z-index: 1; padding-block: 16px; margin-top: -16px; background: var(--dark); }
@media (max-width: 1000px) {
  .face-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}
@media (max-width: 760px) {
  .face-collection { margin-top: 48px; }
  .face-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px 8px; }
  .face-card { padding: 8px 5px; }
  .face-card-name { font-size: 12px; margin-top: 10px; }
  .collection-filters button { padding: 9px 12px; }
  .collection-trigger { align-items: start; flex-direction: column; gap: 20px; }
  .collection-trigger-action { justify-content: space-between; width: 100%; }
  .face-dialog { width: calc(100% - 24px); max-height: calc(100dvh - 24px); border-radius: 10px; }
  .face-dialog .collection-panel { padding: 20px 16px; }
  .collection-heading p { font-size: 13px; }
}
@media (max-width: 360px) {
  .face-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
.feature-columns { display: grid; grid-template-columns: repeat(3, 1fr); margin-top: 52px; padding-top: 40px; border-top: 1px solid #393b40; gap: 40px; scroll-margin-top: 32px; }
.feature-columns article + article { border-left: 1px solid #393b40; padding-left: 40px; }
.feature-preview { display: block; width: min(100%, 280px); margin: 0 auto 30px; border-radius: 50%; }
.feature-preview img { display: block; width: 100%; height: auto; border-radius: 50%; }
.feature-preview:hover { outline: 2px solid #666970; outline-offset: 8px; }
.feature-columns h3 { font-size: 34px; font-weight: 600; letter-spacing: -.025em; line-height: 1.5; }
.feature-columns article > p { margin-top: 12px; font-size: 16px; line-height: 1.95; color: #b8bac0; }
.feature-columns article > .feature-detail { color: #8e9199; font-size: 13px; margin-top: 18px; }
.channel-note { margin-top: 30px; color: #999ca4; font-size: 12px; }
.channel-note a { display: inline-flex; align-items: center; text-decoration: underline; text-underline-offset: 4px; }
.channel-note .arrow { width: 12px; height: 12px; margin-left: 4px; }

.applications { padding-block: 80px; border-bottom: 1px solid var(--rule); }
.applications .section-lead h2 { font-family: var(--font); font-size: clamp(36px, 5.4vw, 80px); font-weight: 750; line-height: 1.25; letter-spacing: -.055em; }
.applications .section-lead > p { color: var(--muted); }
.app-explorer { display: grid; grid-template-columns: 1fr 1.1fr; align-items: center; gap: 80px; margin-top: 64px; }
.app-visual { width: min(100%, 466px); margin-inline: auto; }
.app-screen { display: block; width: 100%; height: auto; border-radius: 50%; background: black; }
.app-visual figcaption { display: flex; justify-content: space-between; gap: 16px; margin-top: 28px; color: var(--muted); font-size: 13px; }
.app-description h3 { font-size: 36px; font-weight: 650; line-height: 1.4; }
.app-description p { color: var(--muted); margin-top: 10px; min-height: 3.4em; }
.app-picker { margin-top: 24px; }
.app-picker h4 { margin: 0 0 10px; font-size: 13px; color: var(--muted); font-weight: 500; }
.app-picker > div { display: flex; flex-wrap: wrap; gap: 8px; }
.app-picker button { min-height: 42px; border: 1px solid #c8cbcf; border-radius: 3px; background: transparent; padding: 8px 13px; color: var(--ink); font-size: 14px; line-height: 1.6; }
.app-picker button:hover { border-color: var(--ink); }
.app-picker button[aria-pressed="true"] { background: var(--red); border-color: var(--red); color: white; }
.app-note { margin-top: 24px; color: #777b83; font-size: 12px; line-height: 1.9; }
.app-error { margin-top: 16px; color: #b32c1c; font-size: 13px; }

.getting-started { background: #fff; padding-block: 64px 70px; }
.getting-started h2 { font-family: RoundDisplay, var(--font); font-weight: 900; font-size: clamp(36px, 5.4vw, 80px); line-height: 1.25; }
.getting-started .section-lead > p { color: var(--muted); }
.start-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 100px; margin-top: 68px; }
.hardware h3 { font-size: 32px; line-height: 1.5; font-weight: 650; letter-spacing: -.04em; }
.board-name { color: var(--muted); font: 400 22px/1.6 Barlow, var(--font); margin-top: 5px; overflow-wrap: anywhere; }
.hardware-photo { margin-block: 28px 18px; }
.hardware-photo img { display: block; width: min(100%, 460px); height: auto; margin-inline: auto; }
.hardware-photo figcaption { text-align: center; color: #777b83; font-size: 12px; margin-top: 12px; }
.hardware-link { display: inline-flex; align-items: center; gap: 10px; font-size: 14px; }
.hardware-specs { margin-top: 30px; border-top: 1px solid var(--rule); }
.hardware-specs > div { display: grid; grid-template-columns: 34% 1fr; gap: 12px; border-bottom: 1px solid var(--rule); padding-block: 16px; font-size: 18px; line-height: 1.6; }
.hardware-specs dt { font-weight: 600; }
.hardware-specs dd { color: #5c5e64; }
.steps { margin: 0; padding: 0; list-style: none; display: grid; gap: 26px; }
.steps li { display: grid; grid-template-columns: 64px 1fr; gap: 16px; }
.step-number { font: 600 48px/1.2 Barlow, sans-serif; color: var(--red); }
.steps h3 { font-size: 27px; line-height: 1.5; font-weight: 650; }
.steps p { margin-top: 3px; color: var(--muted); font-size: 18px; }
.install-actions { gap: 20px; margin-top: 30px; }
.install-actions .button { flex: 1 1 180px; gap: 16px; padding-inline: 20px; min-height: 54px; }
.button-outline { background: transparent; color: var(--ink); }
.button-outline:hover { background: var(--bg); }
.installation-note { margin-top: 18px; color: #777b83; font-size: 12px; line-height: 1.9; }
.installation-note a { text-decoration: underline; text-underline-offset: 3px; }
.release-links { display: flex; flex-wrap: wrap; gap: 8px 28px; margin-top: 18px; font-size: 13px; }
.release-links a { display: inline-flex; align-items: center; gap: 6px; }
.release-links .arrow { width: 12px; height: 12px; }
.release-links a:hover { color: var(--red); }
.release-links .mono { font-size: 14px; }

/* 作者介绍沿用开放布局，独立于安装操作。 / Keep author details separate from setup actions in the open layout. */
.about-author { background: var(--bg); padding-block: 72px; }
.author-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 100px; align-items: center; }
.about-author h2 { color: var(--muted); font-size: 15px; font-weight: 600; }
.author-name { margin-top: 12px; font: 600 clamp(40px, 4.8vw, 64px)/1.15 Barlow, var(--font); letter-spacing: -.045em; }
.author-copy { min-width: 0; }
.author-copy > p { color: var(--muted); font-size: 17px; line-height: 1.9; }
.author-copy > .author-intro { color: var(--ink); font-size: 22px; margin-bottom: 8px; }
.author-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 12px 24px; margin-top: 24px; }
.author-actions .text-link { display: inline-flex; align-items: center; gap: 10px; }
.author-domain { color: var(--muted); font-size: 14px; }

.site-footer { background: #fff; }
.site-footer > .wrap { border-top: 1px solid var(--rule); padding-block: 30px 24px; }
.footer-main { display: flex; justify-content: space-between; align-items: center; gap: 36px; }
.footer-brand { font-size: 32px; }
.footer-main p { font-size: 14px; color: var(--muted); margin-top: 8px; }
.footer-main nav { display: flex; flex-wrap: wrap; gap: 30px; color: #555963; font-size: 14px; }
.footer-main nav a:hover { color: var(--red); }
.footer-bottom { display: flex; justify-content: space-between; gap: 24px; margin-top: 30px; font: 400 14px/1.7 Barlow, var(--font); color: #777b83; }
.footer-bottom a { text-decoration: underline; text-underline-offset: 3px; }
.footer-bottom a:hover { color: var(--red); }

/* 只对操作反馈做短过渡；页面入场由JS增强，CSS不隐藏内容。
   Keep interaction feedback brief; JS enhances entrances without hiding content in CSS. */
.button, .kind-picker button, .collection-filters button, .app-picker button, .face-card {
  transition: transform var(--motion-fast) var(--motion-ease), background-color var(--motion-fast), border-color var(--motion-fast), color var(--motion-fast);
}
.text-link, .release-links a, .site-header nav a, .footer-main nav a { transition: color var(--motion-fast); }
.button .arrow { transition: transform var(--motion-fast) var(--motion-ease); }
.button:is(:hover, :focus-visible) .arrow { transform: translateX(3px); }
.button:focus-visible { transform: translateY(-2px); }
.face-card:focus-visible { background: #24262a; border-color: #92978c; }
.kind-picker button:active, .collection-filters button:active, .app-picker button:active { transform: translateY(1px); }
@media (hover: hover) and (pointer: fine) {
  .face-card:hover { transform: translateY(-3px); }
}

@media (max-width: 1100px) {
  .hero { gap: 36px; padding-block: 76px 58px; }
  .hero-orbit { border-width: 14px; }
  .hero-copy > p { font-size: 16px; }
  .hero-copy .actions { gap: 24px; }
  .face-explorer { gap: 56px; }
  .start-grid { gap: 64px; }
  .author-grid { gap: 64px; }
  .app-explorer { gap: 48px; }
  .feature-columns { gap: 24px; }
  .feature-columns article + article { padding-left: 24px; }
}
@media (max-width: 760px) {
  :root { --gutter: 24px; }
  .site-header { min-height: 104px; flex-wrap: wrap; gap: 16px; padding-block: 18px 16px; }
  .brand { font-size: 24px; gap: 11px; }
  .brand-mark { width: 28px; height: 28px; }
  .site-header nav { width: 100%; gap: 0; justify-content: space-between; }
  .site-header nav a { font-size: 13px; }
  html[lang="en"] .site-header nav { flex-wrap: wrap; justify-content: flex-start; gap: 10px 16px; }
  html[lang="en"] .site-header nav a { white-space: nowrap; }
  .hero { grid-template-columns: 1fr; gap: 56px; padding-block: 52px 40px; }
  h1 { font-size: clamp(46px, 10.5vw, 76px); letter-spacing: -.055em; }
  html[lang="en"] h1 { font-size: clamp(44px, 12.5vw, 76px); }
  .hero-copy > p { margin-top: 22px; font-size: 15px; line-height: 1.9; }
  .actions { margin-top: 28px; gap: 30px; }
  .button { min-height: 52px; padding-inline: 24px; font-size: 15px; gap: 22px; }
  .hero-visual { padding-top: 0; }
  .hero-orbit { width: min(82%, 360px); border-width: 12px; }
  .hero-orbit::after { width: 14px; height: 14px; border-width: 3px; }
  .hero-visual figcaption { margin-top: 26px; font-size: 12px; }
  .applications { padding-block: 52px; }
  .app-explorer { grid-template-columns: 1fr; gap: 36px; margin-top: 40px; }
  .app-visual { width: min(100%, 390px); }
  .app-description h3 { font-size: 28px; }
  .app-picker button { padding-inline: 12px; }
  .feature-preview { width: min(76%, 260px); margin-bottom: 24px; }
  .spec-strip { grid-template-columns: repeat(2, 1fr); padding-block: 0; }
  .spec-strip > div { padding: 22px 6px; }
  .spec-strip > div:nth-child(3) { border-left: 0; }
  .spec-strip > div:nth-child(n+3) { border-top: 1px solid var(--rule); }
  .spec-strip dt { font-size: 29px; }
  .spec-strip dd { font-size: 12px; }
  .showcase { padding-block: 54px 40px; }
  .section-lead { display: block; }
  h2 { font-size: clamp(34px, 7.5vw, 46px); }
  .section-lead > p { margin-top: 20px; font-size: 16px; padding-bottom: 0; }
  .face-explorer { grid-template-columns: 1fr; gap: 40px; margin-top: 38px; }
  .explorer-screen { width: min(86%, 370px); }
  .theme-picker { gap: 10px; justify-content: space-between; }
  .theme-picker button { font-size: 16px; padding-inline: 0; }
  .face-description { padding-top: 28px; min-height: 128px; }
  .face-description h3 { font-size: 38px; }
  .face-description p { font-size: 16px; }
  .kind-picker { gap: 5px; }
  .kind-picker button { min-height: 44px; padding: 5px 3px; font-size: 11px; }
  .face-pagination { margin-top: 16px; }
  .preview-note { margin-top: 20px; font-size: 11px; }
  .feature-columns { grid-template-columns: 1fr; gap: 28px; margin-top: 40px; padding-top: 30px; }
  .feature-columns article + article { border-left: 0; padding-left: 0; border-top: 1px solid #393b40; padding-top: 28px; }
  .feature-columns h3 { font-size: 26px; }
  .feature-columns article > p { font-size: 14px; }
  .feature-columns article > .feature-detail { margin-top: 12px; }
  .channel-note { margin-top: 28px; font-size: 11px; }
  .getting-started { padding-block: 54px 44px; }
  .getting-started h2 { font-size: clamp(34px, 7.5vw, 46px); }
  .start-grid { grid-template-columns: 1fr; gap: 42px; margin-top: 40px; }
  .hardware h3 { font-size: 24px; }
  .board-name { font-size: 17px; }
  .hardware-specs { margin-top: 22px; }
  .hardware-specs > div { grid-template-columns: 28% 1fr; font-size: 14px; padding-block: 14px; }
  .steps { gap: 26px; }
  .steps li { grid-template-columns: 48px 1fr; gap: 12px; }
  .step-number { font-size: 36px; }
  .steps h3 { font-size: 21px; }
  .steps p { font-size: 14px; }
  .install-actions { gap: 12px; }
  .install-actions .button { flex-basis: 135px; padding-inline: 14px; gap: 12px; font-size: 14px; }
  .about-author { padding-block: 44px; }
  .author-grid { grid-template-columns: 1fr; gap: 24px; }
  .author-copy > p { font-size: 15px; }
  .author-copy > .author-intro { font-size: 19px; }
  .author-actions { margin-top: 18px; }
  .footer-main { display: block; }
  .footer-brand { font-size: 28px; }
  .footer-main nav { margin-top: 24px; gap: 28px; font-size: 13px; }
  .footer-bottom { margin-top: 22px; font-size: 12px; }
}
@media (prefers-reduced-motion: reduce) {
  :root { --motion-fast: 0ms; }
  html { scroll-behavior: auto; }
  .face-playback-progress { visibility: hidden; }
  /* 显式撤销过渡，立即终止切换偏好前已启动的效果；仅将时长设零不足以取消它们。
     Remove transitions explicitly to cancel effects already running when the preference changes. */
  .button, .kind-picker button, .collection-filters button, .app-picker button, .face-card,
  .text-link, .release-links a, .site-header nav a, .footer-main nav a, .button .arrow { transition: none; }
  .button:is(:hover, :focus-visible), .button:is(:hover, :focus-visible) .arrow, .face-card:hover,
  .kind-picker button:active, .collection-filters button:active, .app-picker button:active { transform: none; }
}