:root {
  --bg: #f3f6fb;
  --bg-alt: #eef3f9;
  --surface: rgba(255, 255, 255, 0.84);
  --surface-strong: #ffffff;
  --text: #102033;
  --muted: #596a82;
  --line: #d7e3f2;
  --line-strong: #c5d6ea;
  --accent: #a3282a;
  --accent-soft: #fff0ee;
  --blue: #2563eb;
  --blue-soft: #eaf2ff;
  --shadow: 0 24px 60px rgba(111, 137, 168, 0.18);
  --radius-xl: 32px;
  --radius-lg: 24px;
  --radius-md: 18px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  background:
    radial-gradient(circle at top right, rgba(123, 182, 255, 0.16), transparent 28%),
    radial-gradient(circle at bottom left, rgba(255, 140, 132, 0.14), transparent 26%),
    linear-gradient(180deg, #f8fbff 0%, var(--bg) 48%, #f7fafc 100%);
  color: var(--text);
  font-family: "Inter", "Noto Sans SC", sans-serif;
  line-height: 1.6;
  padding: 96px 24px 40px;
}

body::before {
  background-image:
    linear-gradient(rgba(207, 220, 236, 0.24) 1px, transparent 1px),
    linear-gradient(90deg, rgba(207, 220, 236, 0.24) 1px, transparent 1px);
  background-position: center;
  background-size: 36px 36px;
  content: "";
  inset: 0;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.22), transparent 78%);
  pointer-events: none;
  position: fixed;
  z-index: -1;
}

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

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

.lang-en,
.lang-zh {
  display: inline;
}

body[data-lang="zh"] .lang-en,
body[data-lang="en"] .lang-zh {
  display: none;
}

.site-header,
.hero,
.section-block,
.site-footer {
  margin: 0 auto;
  max-width: 1240px;
}

.site-header {
  align-items: center;
  backdrop-filter: blur(16px);
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid rgba(255, 255, 255, 0.72);
  border-radius: 999px;
  box-shadow: 0 14px 34px rgba(124, 146, 174, 0.14);
  display: flex;
  gap: 24px;
  justify-content: space-between;
  left: 24px;
  padding: 14px 18px;
  position: fixed;
  right: 24px;
  top: 20px;
  z-index: 10;
}

.site-header__brand {
  align-items: center;
  display: flex;
  font-size: 1.05rem;
  font-weight: 700;
  gap: 12px;
  letter-spacing: -0.02em;
}

.site-header__brand img {
  border-radius: 14px;
  box-shadow: 0 10px 24px rgba(119, 139, 164, 0.16);
  height: 42px;
  width: 42px;
}

.site-header__nav {
  display: flex;
  gap: 22px;
}

.site-header__nav a {
  color: var(--muted);
  font-size: 0.95rem;
  font-weight: 600;
  position: relative;
}

.site-header__nav a::after {
  background: linear-gradient(90deg, var(--accent), var(--blue));
  border-radius: 999px;
  bottom: -6px;
  content: "";
  height: 2px;
  left: 0;
  position: absolute;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 180ms ease;
  width: 100%;
}

.site-header__nav a:hover::after,
.site-header__nav a:focus-visible::after {
  transform: scaleX(1);
}

.lang-toggle {
  background: linear-gradient(135deg, var(--accent-soft), #ffffff);
  border: 1px solid #f2cbc5;
  border-radius: 999px;
  color: var(--accent);
  cursor: pointer;
  font: inherit;
  font-weight: 700;
  min-width: 68px;
  padding: 10px 16px;
}

.lang-toggle--footer {
  min-height: 44px;
}

.hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 28px 0 44px;
  text-align: center;
}

.hero__copy,
.hero__media,
.diagram-card,
.gallery-card,
.code-shell,
.info-card,
.capability-card,
.note-card,
.step-card,
.preview-card {
  backdrop-filter: blur(18px);
  background: var(--surface);
  border: 1px solid rgba(255, 255, 255, 0.78);
  box-shadow: var(--shadow);
}

.hero__copy {
  border-radius: var(--radius-xl);
  padding: 44px;
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
}

.hero__media {
  border-radius: calc(var(--radius-xl) + 4px);
  min-height: 620px;
  overflow: hidden;
  padding: 30px;
  position: relative;
}

.preview-card {
  border-radius: 26px;
  overflow: hidden;
  position: absolute;
  transition: transform 220ms ease, box-shadow 220ms ease;
}

.preview-card:hover,
.info-card:hover,
.capability-card:hover,
.gallery-card:hover,
.note-card:hover,
.step-card:hover {
  box-shadow: 0 28px 58px rgba(111, 137, 168, 0.22);
  transform: translateY(-6px);
}

.preview-card--primary {
  inset: 38px 110px 214px 26px;
  z-index: 3;
}

.preview-card--secondary {
  bottom: 104px;
  left: 120px;
  right: 26px;
  z-index: 2;
}

.preview-card--accent {
  bottom: 26px;
  left: 40px;
  right: 170px;
  z-index: 1;
}

.eyebrow {
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  margin: 0 0 18px;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin: 0;
}

h1 {
  font-size: clamp(2rem, 3.5vw, 3.2rem);
}

h2 {
  font-size: clamp(2rem, 3vw, 3.1rem);
}

h3 {
  font-size: 1.3rem;
}

.accent {
  color: var(--accent);
}

.hero__lead,
.section-copy {
  color: var(--muted);
  font-size: 1.05rem;
  margin: 22px auto 0;
  max-width: 58ch;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: center;
  margin: 28px 0 24px;
}

.hero__logo {
  border-radius: 28px;
  box-shadow: 0 18px 40px rgba(119, 139, 164, 0.2);
  height: 96px;
  margin-bottom: 24px;
  width: 96px;
}

.button {
  align-items: center;
  border-radius: 999px;
  display: inline-flex;
  font-size: 0.98rem;
  font-weight: 700;
  gap: 8px;
  justify-content: center;
  min-height: 50px;
  padding: 0 22px;
}

.button-primary {
  background: linear-gradient(135deg, var(--accent), #d4514c);
  box-shadow: 0 18px 34px rgba(163, 40, 42, 0.24);
  color: #fff;
}

.button-secondary {
  background: rgba(255, 255, 255, 0.85);
  border: 1px solid var(--line);
  color: var(--text);
}

.hero__signals {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  list-style: none;
  margin: 0;
  padding: 0;
}

.hero__signals li,
.proof-chip {
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 700;
  padding: 10px 14px;
}

.section-block {
  padding: 34px 0 14px;
}

.section-block--tight {
  padding-top: 6px;
}

.section-block--alt .diagram-card,
.section-block--alt .code-shell,
.section-block--alt .note-card,
.section-block--alt .step-card {
  background: rgba(255, 255, 255, 0.92);
}

.section-block__header {
  margin-bottom: 24px;
  text-align: center;
}

.proof-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin-bottom: 26px;
}

.card-grid {
  display: grid;
  gap: 18px;
}

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

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

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

.info-card--blue {
  border-left: 4px solid var(--blue);
}

.info-card--red {
  border-left: 4px solid var(--accent);
}

.comparison-table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.comparison-table {
  backdrop-filter: blur(18px);
  background: var(--surface);
  border: 1px solid rgba(255, 255, 255, 0.78);
  border-collapse: separate;
  border-radius: var(--radius-lg);
  border-spacing: 0;
  box-shadow: var(--shadow);
  font-size: 0.92rem;
  min-width: 700px;
  width: 100%;
}

.comparison-table th,
.comparison-table td {
  border-bottom: 1px solid var(--line);
  padding: 14px 16px;
  text-align: left;
}

.comparison-table thead th {
  background: rgba(240, 245, 252, 0.7);
  color: var(--muted);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.comparison-table tbody tr:last-child td {
  border-bottom: none;
}

.comparison-table__highlight {
  background: rgba(163, 40, 42, 0.04);
  color: var(--accent);
  font-weight: 700;
}

.info-card,
.capability-card,
.note-card,
.step-card,
.gallery-card {
  border-radius: var(--radius-lg);
  padding: 24px;
}

.info-card__index,
.step-card__index {
  color: var(--accent);
  font-size: 0.85rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  margin: 0 0 16px;
}

.info-card p,
.capability-card p,
.note-card p,
.step-card p,
.gallery-card p {
  color: var(--muted);
  margin: 14px 0 0;
}

.diagram-card {
  border-radius: var(--radius-xl);
  overflow: hidden;
  padding: 0;
}

.diagram-card img {
  display: block;
  width: 100%;
}

.workflow-layout {
  align-items: stretch;
  display: grid;
  gap: 20px;
  grid-template-columns: minmax(0, 1.3fr) minmax(280px, 0.7fr);
}

.workflow-layout .diagram-card {
  display: flex;
  flex-direction: column;
  background: linear-gradient(180deg, var(--surface) 0%, rgba(244, 247, 252, 0.95) 100%);
}

.workflow-layout .diagram-card img {
  width: 100%;
}

.workflow-layout .diagram-card .pipeline-detail {
  flex: 1;
  object-fit: cover;
  object-position: top center;
  border-radius: 0 0 var(--radius-xl) var(--radius-xl);
}

.quickstart-layout {
  display: grid;
  gap: 20px;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
}

.workflow-notes,
.quickstart-steps {
  display: grid;
  gap: 16px;
}

.capability-card {
  min-height: 200px;
  position: relative;
}

.capability-card::before {
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.08), rgba(163, 40, 42, 0.08));
  border-radius: 18px;
  content: "";
  inset: 16px;
  position: absolute;
  z-index: 0;
}

.capability-card h3,
.capability-card p {
  position: relative;
  z-index: 1;
}

.code-shell {
  border-radius: var(--radius-xl);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.code-shell__tabs {
  align-items: center;
  background: #102033;
  color: #d9e4f2;
  display: flex;
  font-size: 0.9rem;
  justify-content: space-between;
  padding: 14px 18px;
}

.code-shell__tabs a {
  color: #9bc4ff;
  font-weight: 700;
}

.code-shell pre {
  background: #142236;
  color: #f3f7fb;
  flex: 1;
  margin: 0;
  overflow-x: auto;
  padding: 22px 18px 24px;
}

.code-shell code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.95rem;
}

.preview-gallery {
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.gallery-card img {
  border-radius: 18px;
  margin-bottom: 18px;
}

.site-footer {
  align-items: center;
  border-top: 1px solid var(--line);
  color: var(--muted);
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-top: 24px;
  padding: 28px 0 8px;
  text-align: center;
}

.site-footer strong {
  color: var(--text);
}

.site-footer p {
  margin: 8px 0 0;
}

.site-footer__links {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 500ms ease, transform 500ms ease;
}

[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1080px) {
  body {
    padding-left: 18px;
    padding-right: 18px;
  }

  .site-header {
    border-radius: 28px;
    flex-wrap: wrap;
    justify-content: center;
  }

  .site-header__nav {
    flex-wrap: wrap;
    justify-content: center;
  }

  .hero,
  .workflow-layout,
  .quickstart-layout,
  .preview-gallery,
  .card-grid--four,
  .card-grid--three,
  .card-grid--two {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  body {
    padding-top: 140px;
  }

  .site-header {
    left: 16px;
    padding: 14px;
    right: 16px;
    top: 16px;
  }

  .site-header__brand img {
    height: 36px;
    width: 36px;
  }

  .hero__copy,
  .diagram-card,
  .info-card,
  .capability-card,
  .note-card,
  .step-card,
  .gallery-card {
    padding: 20px;
  }

  h1 {
    font-size: 1.8rem;
  }

  h2 {
    font-size: 1.9rem;
  }
}