:root {
  --ink: #0f172a;
  --muted: #5b667a;
  --soft: #eef4ff;
  --line: rgba(15, 23, 42, 0.12);
  --blue: #2563eb;
  --blue-dark: #1e40af;
  --cyan: #40c7d8;
  --paper: #ffffff;
  --surface: #f7f9fc;
  --shadow: 0 24px 70px rgba(15, 23, 42, 0.18);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--paper);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  background: var(--paper);
}

body.zh {
  font-family: "PingFang SC", "Microsoft YaHei", Inter, ui-sans-serif, system-ui, sans-serif;
}

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

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

.site-header {
  position: fixed;
  z-index: 20;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 72px;
  padding: 0 clamp(18px, 4vw, 58px);
  color: #ffffff;
  background: rgba(8, 15, 31, 0.72);
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
  backdrop-filter: blur(18px);
}

.brand,
.header-actions,
.nav-links {
  display: flex;
  align-items: center;
}

.brand {
  gap: 10px;
  min-width: 132px;
  font-size: 17px;
  font-weight: 800;
}

.brand img {
  border-radius: 12px;
  box-shadow: 0 10px 28px rgba(37, 99, 235, 0.38);
}

.nav-links {
  gap: 24px;
  color: rgba(255, 255, 255, 0.78);
  font-size: 14px;
  font-weight: 700;
}

.nav-links a:hover {
  color: #ffffff;
}

.header-actions {
  gap: 10px;
}

.language-toggle,
.github-link,
.primary-action,
.secondary-action {
  min-height: 42px;
  border-radius: 999px;
  font: inherit;
  font-weight: 800;
}

.language-toggle {
  border: 1px solid rgba(255, 255, 255, 0.28);
  color: #ffffff;
  background: rgba(255, 255, 255, 0.1);
  padding: 0 14px;
  cursor: pointer;
}

.github-link {
  display: inline-flex;
  align-items: center;
  padding: 0 18px;
  color: #07132b;
  background: #ffffff;
}

.hero {
  position: relative;
  min-height: 94vh;
  overflow: hidden;
  display: grid;
  align-items: center;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 440px);
  gap: clamp(32px, 6vw, 88px);
  padding: 120px clamp(22px, 6vw, 88px) 76px;
  color: #ffffff;
  background: #08101f;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(6, 12, 25, 0.96), rgba(6, 12, 25, 0.76) 42%, rgba(6, 12, 25, 0.38)),
    image-set(url("assets/en/control-buttons.png") 1x);
  background-size: cover;
  background-position: center;
  opacity: 0.9;
}

.hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 130px;
  background: linear-gradient(180deg, rgba(8, 16, 31, 0), #ffffff);
  pointer-events: none;
}

.hero-content,
.hero-device {
  position: relative;
  z-index: 1;
}

.hero-content {
  min-width: 0;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--cyan);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
  overflow-wrap: anywhere;
}

.hero h1 {
  max-width: 880px;
  margin: 0;
  font-size: clamp(42px, 7vw, 88px);
  line-height: 0.96;
  letter-spacing: 0;
}

.hero-copy {
  max-width: 720px;
  margin: 24px 0 0;
  color: rgba(255, 255, 255, 0.8);
  font-size: clamp(18px, 2vw, 23px);
  line-height: 1.55;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.primary-action,
.secondary-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 22px;
}

.primary-action {
  color: #ffffff;
  background: linear-gradient(135deg, var(--blue), #0ea5e9);
  box-shadow: 0 18px 40px rgba(37, 99, 235, 0.34);
}

.secondary-action {
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.28);
  background: rgba(255, 255, 255, 0.1);
}

.hero-proof {
  display: flex;
  flex-wrap: wrap;
  gap: 22px;
  margin: 40px 0 0;
}

.hero-proof div {
  min-width: 140px;
  padding-left: 14px;
  border-left: 2px solid rgba(64, 199, 216, 0.9);
}

.hero-proof dt {
  font-size: 22px;
  font-weight: 900;
}

.hero-proof dd {
  margin: 4px 0 0;
  color: rgba(255, 255, 255, 0.7);
  font-size: 13px;
}

.hero-device {
  justify-self: center;
  width: min(78vw, 360px);
  padding: 12px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 42px;
  background: rgba(255, 255, 255, 0.11);
  box-shadow: var(--shadow);
}

.hero-device img {
  width: 100%;
  max-height: 66vh;
  object-fit: cover;
  object-position: top;
  border-radius: 32px;
}

.section {
  padding: clamp(74px, 9vw, 130px) clamp(22px, 6vw, 88px);
}

.section-heading {
  max-width: 850px;
}

.section-heading h2,
.showcase-copy h2,
.workflow-text h2,
.cta-band h2 {
  margin: 0;
  font-size: clamp(32px, 4.6vw, 62px);
  line-height: 1.04;
  letter-spacing: 0;
}

.section-heading p,
.showcase-copy p,
.workflow-text p,
.cta-band p {
  color: var(--muted);
  font-size: 18px;
  line-height: 1.7;
}

.intro-band {
  background: #ffffff;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 44px;
}

.feature-item {
  min-height: 250px;
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: linear-gradient(180deg, #ffffff, #f8fbff);
}

.icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  color: var(--blue);
  font-size: 25px;
  font-weight: 900;
  border-radius: 8px;
  background: var(--soft);
}

.feature-item h3 {
  margin: 24px 0 10px;
  font-size: 22px;
}

.feature-item p {
  margin: 0;
  color: var(--muted);
  line-height: 1.65;
}

.product-showcase {
  display: grid;
  grid-template-columns: minmax(280px, 0.74fr) minmax(0, 1.26fr);
  gap: clamp(28px, 5vw, 74px);
  background: var(--surface);
}

.showcase-copy {
  align-self: start;
  position: sticky;
  top: 100px;
}

.screenshot-rail {
  display: grid;
  gap: 20px;
}

.screenshot-rail figure {
  margin: 0;
  overflow: hidden;
  border: 1px solid rgba(15, 23, 42, 0.1);
  border-radius: 8px;
  background: #ffffff;
  box-shadow: 0 20px 44px rgba(15, 23, 42, 0.08);
}

.screenshot-rail img {
  width: 100%;
  aspect-ratio: 2.1 / 1;
  object-fit: cover;
  object-position: top;
}

.screenshot-rail figcaption {
  padding: 14px 16px 16px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 800;
}

.comparison {
  background: #ffffff;
}

.comparison-table {
  margin-top: 44px;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  background: #ffffff;
}

.table-row {
  display: grid;
  grid-template-columns: 0.95fr 1fr 1.22fr 1.35fr;
}

.table-row > div {
  padding: 20px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  line-height: 1.55;
}

.table-row > div:last-child {
  border-right: 0;
}

.table-row:last-child > div {
  border-bottom: 0;
}

.table-head > div {
  color: var(--ink);
  font-size: 13px;
  font-weight: 900;
  text-transform: uppercase;
  background: #f1f6ff;
}

.table-row:not(.table-head) > div:first-child,
.table-row:not(.table-head) > div:last-child {
  color: var(--ink);
  font-weight: 800;
}

.workflow {
  display: grid;
  grid-template-columns: minmax(280px, 0.8fr) minmax(0, 1.2fr);
  gap: clamp(30px, 5vw, 80px);
  color: #ffffff;
  background: #0b1220;
}

.workflow .eyebrow,
.cta-band .eyebrow {
  color: #78e2ef;
}

.workflow-text p {
  color: rgba(255, 255, 255, 0.72);
}

.workflow-steps {
  display: grid;
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.workflow-steps li {
  display: grid;
  grid-template-columns: 60px 1fr;
  gap: 4px 18px;
  padding: 22px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.06);
}

.workflow-steps span {
  grid-row: span 2;
  color: #78e2ef;
  font-weight: 900;
}

.workflow-steps strong {
  font-size: 20px;
}

.workflow-steps p {
  margin: 4px 0 0;
  color: rgba(255, 255, 255, 0.68);
  line-height: 1.55;
}

.audience {
  background: var(--surface);
}

.audience-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 38px;
}

.audience-list p {
  margin: 0;
  min-height: 190px;
  padding: 26px;
  color: var(--ink);
  font-size: 18px;
  line-height: 1.62;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
}

.cta-band {
  display: grid;
  place-items: center;
  text-align: center;
  padding: clamp(82px, 10vw, 130px) 22px;
  color: #ffffff;
  background:
    linear-gradient(180deg, rgba(9, 15, 30, 0.86), rgba(9, 15, 30, 0.94)),
    url("assets/en/commands.png") center / cover;
}

.cta-band img {
  border-radius: 20px;
  margin-bottom: 24px;
}

.cta-band h2 {
  max-width: 820px;
}

.cta-band p {
  max-width: 680px;
  color: rgba(255, 255, 255, 0.74);
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 28px clamp(22px, 6vw, 88px);
  color: var(--muted);
  border-top: 1px solid var(--line);
}

.site-footer p {
  margin: 0;
}

.site-footer a {
  font-weight: 800;
  color: var(--blue-dark);
}

@media (max-width: 980px) {
  .nav-links {
    display: none;
  }

  .hero,
  .product-showcase,
  .workflow {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding-top: 116px;
  }

  .hero-device {
    justify-self: start;
    width: min(68vw, 320px);
  }

  .showcase-copy {
    position: static;
  }

  .feature-grid,
  .audience-list {
    grid-template-columns: 1fr;
  }

  .table-row {
    grid-template-columns: 1fr;
  }

  .table-row > div {
    border-right: 0;
  }

  .table-row > div::before {
    content: attr(data-label);
    display: block;
    margin-bottom: 7px;
    color: var(--blue-dark);
    font-size: 12px;
    font-weight: 900;
    text-transform: uppercase;
  }

  .table-head {
    display: none;
  }
}

@media (max-width: 640px) {
  .site-header {
    height: 66px;
    padding: 0 14px;
  }

  .brand span {
    display: none;
  }

  .github-link {
    padding: 0 13px;
  }

  .hero h1 {
    font-size: 36px;
    line-height: 1.04;
    overflow-wrap: anywhere;
  }

  .hero-content {
    max-width: calc(100vw - 44px);
  }

  .hero-copy,
  .section-heading p,
  .showcase-copy p,
  .workflow-text p,
  .cta-band p {
    font-size: 16px;
  }

  .hero-proof {
    gap: 16px;
  }

  .hero-device {
    width: min(82vw, 300px);
  }

  .section {
    padding: 70px 18px;
  }

  .feature-item,
  .audience-list p,
  .workflow-steps li {
    padding: 20px;
  }

  .site-footer {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (prefers-reduced-motion: no-preference) {
  .feature-item,
  .screenshot-rail figure,
  .audience-list p,
  .workflow-steps li {
    transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
  }

  .feature-item:hover,
  .screenshot-rail figure:hover,
  .audience-list p:hover,
  .workflow-steps li:hover {
    transform: translateY(-3px);
    border-color: rgba(37, 99, 235, 0.32);
    box-shadow: 0 18px 44px rgba(15, 23, 42, 0.1);
  }
}