:root {
  color-scheme: light;
  --canvas: #fbfbfa;
  --ink: #142632;
  --ink-soft: #465966;
  --muted: #778791;
  --line: rgba(20, 38, 50, 0.16);
  --line-strong: rgba(20, 38, 50, 0.34);
  --blue: #007dce;
  --sky: #00bfe8;
  --display: "Source Serif 4 Variable", "Noto Serif SC Variable", serif;
  --body: "Source Sans 3 Variable", "Noto Sans SC Variable", sans-serif;
  --lab: "JetBrains Mono Variable", "SFMono-Regular", Consolas, monospace;
  --mono: ui-monospace, "SFMono-Regular", Consolas, monospace;
  --page: 1440px;
  --gutter: clamp(24px, 5vw, 76px);
}

* {
  box-sizing: border-box;
}

html {
  min-width: 0;
  background: var(--canvas);
  scroll-behavior: smooth;
  scrollbar-gutter: stable;
}

body {
  display: flex;
  min-height: 100svh;
  flex-direction: column;
  min-width: 0;
  margin: 0;
  overflow-x: hidden;
  background: radial-gradient(circle at 90% 8%, rgba(0, 191, 232, 0.07), transparent 34%), var(--canvas);
  color: var(--ink);
  font-family: var(--body);
  -webkit-font-smoothing: antialiased;
}

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

button {
  color: inherit;
  font: inherit;
}

.lang-zh,
.lang-en {
  display: none;
}

html[data-lang="zh"] .lang-zh,
html[data-lang="en"] .lang-en {
  display: inline;
}

html[data-lang="zh"] {
  --display:
    "SF Pro SC", "SF Pro Display", "PingFang SC", "Hiragino Sans GB",
    "Noto Sans SC Variable", "Microsoft YaHei", sans-serif;
  --body:
    "SF Pro SC", "SF Pro Text", "PingFang SC", "Hiragino Sans GB",
    "Noto Sans SC Variable", "Microsoft YaHei", sans-serif;
}

html[data-lang="zh"] body,
html[data-lang="zh"] h2,
html[data-lang="zh"] h3,
html[data-lang="zh"] p {
  letter-spacing: 0;
}

:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 100;
  padding: 10px 14px;
  background: var(--ink);
  color: #fff;
  transform: translateY(-160%);
}

.skip-link:focus {
  transform: none;
}

.lab-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  min-height: 75px;
  margin: 0 auto;
  padding: 12px max(24px, calc((100vw - 1420px) / 2));
}

.vi-wordmark {
  display: inline-flex;
  align-items: center;
}

.vi-wordmark img {
  display: block;
  width: 46px;
  height: auto;
}

.language-switch {
  display: flex;
  gap: 8px;
  align-items: center;
  color: var(--muted);
  font-size: 14px;
}

.language-switch button {
  padding: 8px 3px;
  border: 0;
  background: transparent;
  cursor: pointer;
  opacity: 0.5;
}

.language-switch button[aria-pressed="true"] {
  color: var(--ink);
  font-weight: 650;
  opacity: 1;
}

main,
.lab-footer {
  width: min(100%, var(--page));
  margin: 0 auto;
}

.lab-hero {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: clamp(290px, 37vh, 400px);
  padding: clamp(34px, 4.5vh, 54px) var(--gutter);
  overflow: clip;
}

.lab-hero h1 {
  display: flex;
  align-items: center;
  min-height: 0.94em;
  margin: 0;
  font-size: clamp(66px, 9vw, 132px);
  font-weight: 400;
  letter-spacing: -0.065em;
  line-height: 0.84;
  white-space: nowrap;
}

.lab-title-wordmark {
  display: block;
  width: min(61vw, 780px);
  height: auto;
}

.lab-typewriter-wrap {
  display: inline-flex;
  align-items: center;
  width: 2.55em;
  margin-left: 0.18em;
  color: var(--blue);
  font-family: var(--lab);
  font-size: 0.75em;
  font-variation-settings: "wght" 650;
  letter-spacing: -0.035em;
  line-height: 0.84;
  transform: none;
}

.lab-title-type {
  display: inline-block;
}

.type-cursor {
  flex: none;
  width: 0.07em;
  height: 0.8em;
  margin-left: 0.02em;
  background: var(--sky);
  transform: translateY(-0.04em);
  animation: cursor-blink 850ms steps(1, end) infinite;
}

@keyframes cursor-blink {
  0%,
  46% {
    opacity: 1;
  }
  47%,
  100% {
    opacity: 0;
  }
}

.lab-vision {
  max-width: 820px;
  margin: clamp(24px, 3.2vh, 34px) 0 0;
  color: var(--ink-soft);
  font-family: var(--display);
  font-size: clamp(27px, 2.8vw, 40px);
  font-variation-settings: "wght" 420;
  letter-spacing: -0.035em;
  line-height: 1.14;
}

.writing {
  padding: clamp(26px, 3.2vw, 40px) var(--gutter) clamp(34px, 4vw, 52px);
}

.writing-heading {
  display: block;
}

.article-number,
.article-meta time {
  font-family: var(--mono);
}

.article-meta {
  display: contents;
}

.article-copy {
  display: contents;
}

.writing-heading h2 {
  margin: 0;
  font-family: var(--display);
  font-size: clamp(38px, 3.8vw, 54px);
  font-variation-settings: "wght" 430;
  letter-spacing: -0.045em;
}

.article-card {
  display: grid;
  grid-template-columns: 140px minmax(0, 1fr);
  grid-template-rows: auto auto;
  column-gap: 22px;
  row-gap: 8px;
  align-items: baseline;
  margin-top: 22px;
  padding: 20px 0 24px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  transition: border-color 180ms ease, color 180ms ease;
}

.article-card:hover {
  border-color: var(--blue);
}

.writing > .article-card:last-of-type {
  border-bottom: 0;
}

.article-number {
  grid-column: 1;
  grid-row: 1;
  color: var(--blue);
  font-family: var(--lab);
  font-size: 27px;
  font-variation-settings: "wght" 620;
  letter-spacing: -0.045em;
  line-height: 1;
}

.article-meta time {
  grid-column: 1;
  grid-row: 2;
  color: var(--muted);
  font-size: 13px;
  font-variation-settings: "wght" 540;
  letter-spacing: 0.055em;
}

.article-copy h3 {
  grid-column: 2;
  grid-row: 1;
  margin: 0;
  font-family: var(--display);
  font-size: clamp(28px, 3.1vw, 44px);
  font-variation-settings: "wght" 450;
  letter-spacing: -0.045em;
  line-height: 1.02;
}

.article-copy > p:last-child {
  grid-column: 2;
  grid-row: 2;
  max-width: 760px;
  margin: 0;
  color: var(--ink-soft);
  font-size: 16px;
  line-height: 1.48;
}

.lab-footer {
  width: 100%;
  margin: auto 0 0;
  padding: 20px max(24px, calc((100vw - 1420px) / 2)) 22px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
}

.lab-footer p {
  margin: 0;
}

@media (min-width: 601px) {
  .lab-hero {
    min-height: clamp(250px, 32vh, 350px);
    padding-top: clamp(24px, 3vh, 40px);
    padding-bottom: clamp(24px, 3vh, 40px);
  }

  .lab-vision {
    margin-top: clamp(18px, 2.2vh, 26px);
  }

  .writing {
    padding-top: clamp(18px, 2vw, 28px);
    padding-bottom: clamp(24px, 2.8vw, 38px);
  }

  .article-card {
    margin-top: 16px;
    padding-top: 14px;
    padding-bottom: 18px;
    row-gap: 6px;
  }
}

@media (min-width: 901px) and (max-height: 800px) {
  .lab-header {
    min-height: 66px;
    padding-top: 8px;
    padding-bottom: 8px;
  }

  .lab-hero {
    min-height: 230px;
    padding-top: 18px;
    padding-bottom: 18px;
  }

  .lab-hero h1 {
    font-size: 94px;
  }

  .lab-title-wordmark {
    width: min(56vw, 700px);
  }

  .lab-vision {
    margin-top: 16px;
    font-size: 30px;
  }

  .writing {
    padding-top: 14px;
    padding-bottom: 20px;
  }

  .writing-heading h2 {
    font-size: 42px;
  }

  .article-card {
    margin-top: 10px;
    padding-top: 11px;
    padding-bottom: 13px;
  }

  .article-copy h3 {
    font-size: 34px;
  }

  .article-copy > p:last-child {
    font-size: 15px;
  }

  .lab-footer {
    padding-top: 14px;
    padding-bottom: 16px;
  }
}

@media (max-width: 900px) {
  .lab-hero h1 {
    flex-direction: column;
    flex-wrap: nowrap;
    align-items: flex-start;
    gap: clamp(14px, 2.5vw, 22px);
    font-size: clamp(60px, 12.5vw, 94px);
    line-height: 0.86;
  }

  .lab-title-wordmark {
    flex: none;
    width: min(100%, 700px);
  }

  .lab-typewriter-wrap {
    flex: none;
    height: 0.86em;
    margin-top: 0;
    margin-left: 0;
    transform: none;
  }
}

@media (max-width: 1180px) {
  .lab-header {
    --menu-reserve: 34.703px;
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto var(--menu-reserve);
    gap: 34px;
  }

  html[data-lang="zh"] .lab-header {
    --menu-reserve: 30px;
  }

  .lab-header::after {
    width: var(--menu-reserve);
    content: "";
  }
}

@media (max-width: 760px) {
  .lab-header {
    --menu-reserve: 32.391px;
    min-height: 72px;
    gap: 12px;
    padding: 8px 16px;
  }

  html[data-lang="zh"] .lab-header {
    --menu-reserve: 28px;
  }

  .lab-footer {
    padding: 22px 16px 26px;
  }
}

@media (max-width: 600px) {
  .vi-wordmark img {
    width: 42px;
  }

  .language-switch {
    gap: 5px;
    font-size: 12px;
  }

  .lab-hero {
    min-height: 400px;
    padding-top: 44px;
    padding-bottom: 44px;
  }

  .lab-hero h1 {
    font-size: clamp(43px, 13.5vw, 58px);
  }

  .lab-vision {
    margin-top: 38px;
    font-size: clamp(28px, 8.5vw, 38px);
    line-height: 1.16;
  }

  .writing {
    padding-top: 42px;
  }

  .writing-heading h2 {
    font-size: 42px;
  }

  .article-card {
    grid-template-columns: 1fr;
    grid-template-rows: auto auto;
    gap: 14px;
    margin-top: 26px;
    padding: 26px 0 28px;
  }

  .article-meta {
    display: flex;
    grid-column: 1;
    grid-row: 1;
    flex-direction: row;
    justify-content: space-between;
    align-items: baseline;
  }

  .article-copy {
    display: block;
    grid-column: 1;
    grid-row: 2;
  }

  .article-number,
  .article-meta time,
  .article-copy h3,
  .article-copy > p:last-child {
    grid-column: auto;
    grid-row: auto;
  }

  .article-copy h3 {
    font-size: 35px;
  }

  .article-copy > p:last-child {
    margin-top: 13px;
    font-size: 16px;
  }
}

@media (max-width: 760px) and (max-height: 720px) {
  .lab-header {
    min-height: 68px;
  }
}

@media (max-width: 340px) and (max-height: 620px) {
  .lab-header {
    --menu-reserve: 27.766px;
    min-height: 60px;
    gap: 8px;
    padding: 6px 10px;
  }

  html[data-lang="zh"] .lab-header {
    --menu-reserve: 24px;
  }

  .lab-footer {
    padding: 18px 16px 22px;
  }
}

@media (max-width: 370px) {
  .vi-wordmark img {
    width: 40px;
  }

  .lab-hero h1 {
    font-size: 43px;
  }

  html[data-lang="zh"] .article-copy h3 {
    font-size: 32px;
  }

  html[data-lang="zh"] .article-title-roborsi {
    font-size: 30px;
    white-space: nowrap;
  }
}

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

  .type-cursor {
    animation: none;
    opacity: 1;
  }

  .article-card {
    transition: none;
  }
}