:root {
  --ps-blue: #0070cc;
  --ps-cyan: #1eaedb;
  --link-blue: #1883fd;
  --paper: #ffffff;
  --mist: #f5f7fa;
  --black: #000000;
  --shadow-black: #121314;
  --text: #1f1f1f;
  --muted: #6b6b6b;
  --white: #ffffff;
  --line: rgba(255, 255, 255, 0.12);
  --radius-xs: 3px;
  --radius-sm: 12px;
  --radius-md: 19px;
  --radius-lg: 24px;
  --radius-pill: 999px;
  --shadow-1: 0 5px 9px rgba(0, 0, 0, 0.06);
  --shadow-2: 0 5px 9px rgba(0, 0, 0, 0.08);
  --shadow-3: 0 5px 9px rgba(0, 0, 0, 0.16);
  --shadow-hero: 0 5px 9px rgba(0, 0, 0, 0.8);
  --container: 1440px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  color: var(--text);
  background: var(--paper);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

.container {
  width: min(calc(100% - 32px), var(--container));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(0, 0, 0, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 76px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  color: var(--white);
  flex-shrink: 0;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  overflow: hidden;
  border-radius: 12px;
  background: #ffffff;
  box-shadow: var(--shadow-3);
}

.brand-logo {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.brand-title {
  font-size: 18px;
  font-weight: 500;
  letter-spacing: 0.2px;
}

.brand-sub {
  margin-top: 2px;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.6);
}

.nav {
  display: flex;
  align-items: center;
  gap: 28px;
  color: rgba(255, 255, 255, 0.86);
  font-size: 14px;
}

.nav a {
  transition: color 180ms ease;
}

.nav a:hover {
  color: var(--link-blue);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 12px 28px;
  border: 0;
  border-radius: var(--radius-pill);
  font-size: 18px;
  font-weight: 500;
  letter-spacing: 0.4px;
  cursor: pointer;
  transform-origin: center;
  transition:
    background 180ms ease,
    transform 180ms ease,
    box-shadow 180ms ease,
    border-color 180ms ease,
    color 180ms ease,
    opacity 180ms ease;
}

.btn:hover {
  transform: scale(1.08);
  background: var(--ps-cyan);
  color: var(--white);
  box-shadow: 0 0 0 2px var(--ps-blue);
  border: 2px solid var(--white);
}

.btn:active {
  opacity: 0.8;
}

.btn-primary {
  background: var(--ps-blue);
  color: var(--white);
}

.btn-secondary {
  background: var(--white);
  color: var(--ps-blue);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-ghost {
  min-height: 42px;
  padding: 10px 18px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: transparent;
  color: var(--white);
  font-size: 14px;
  letter-spacing: 0.2px;
}

.hero {
  background: linear-gradient(to bottom, var(--shadow-black), var(--black));
  color: var(--white);
}

.hero-inner {
  padding: 120px 0 144px;
}

.hero-copy {
  max-width: 900px;
}

.eyebrow {
  font-size: 14px;
  color: var(--ps-blue);
  letter-spacing: 0.1px;
}

.eyebrow-accent {
  color: #53b1ff;
}

.hero h1,
.section h2,
.card-title,
.module-title,
.download-title,
.doc-title,
.footer-brand {
  font-weight: 300;
  letter-spacing: -0.1px;
}

.hero h1 {
  margin: 0;
  max-width: 840px;
  font-size: clamp(40px, 6vw, 72px);
  line-height: 1.12;
}

.hero p {
  margin: 28px 0 0;
  max-width: 720px;
  font-size: clamp(18px, 2vw, 20px);
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.72);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 40px;
}

.section {
  padding: 96px 0;
}

.section-light {
  background: linear-gradient(to bottom, #ffffff, #f5f7fa);
}

.section-white {
  background: #ffffff;
}

.section-dark {
  background: #000000;
  color: #ffffff;
}

.section-head {
  max-width: 860px;
}

.section-head h2 {
  margin: 12px 0 0;
  font-size: clamp(28px, 3vw, 35px);
  line-height: 1.25;
}

.section-head p {
  margin: 16px 0 0;
  font-size: 18px;
  line-height: 1.7;
  color: var(--muted);
}

.section-dark .section-head p {
  color: rgba(255, 255, 255, 0.68);
}

.grid-3,
.grid-4,
.grid-2 {
  display: grid;
  gap: 24px;
  margin-top: 40px;
}

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

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

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

.card {
  padding: 28px;
  border-radius: var(--radius-lg);
  background: var(--white);
  box-shadow: var(--shadow-1);
  transition:
    transform 200ms ease,
    box-shadow 200ms ease,
    border-color 200ms ease,
    background 200ms ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-3);
}

.card-dark {
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.05);
  color: var(--white);
  box-shadow: var(--shadow-2);
}

.card-dark:hover {
  background: rgba(255, 255, 255, 0.09);
  border-color: rgba(255, 255, 255, 0.18);
}

.pill-tag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 28px;
  padding: 6px 12px;
  border-radius: var(--radius-pill);
  background: var(--mist);
  color: #0068bd;
  font-size: 12px;
}

.card-title,
.module-title,
.download-title,
.workflow-title,
.doc-title {
  margin: 20px 0 0;
  font-size: 22px;
  line-height: 1.3;
}

.doc-title-compact {
  margin: 12px 0 0;
  font-size: clamp(28px, 3vw, 35px);
  line-height: 1.25;
}

.card p,
.download-card p,
.workflow-card p,
.doc-copy,
.footer-copy {
  margin: 16px 0 0;
  font-size: 18px;
  line-height: 1.7;
  color: var(--muted);
}

.card-dark p,
.workflow-dark p,
.doc-copy-dark {
  color: rgba(255, 255, 255, 0.68);
}

.workflow-card {
  padding: 28px;
  border-radius: var(--radius-lg);
  background: linear-gradient(to bottom, #ffffff, #f5f7fa);
  box-shadow: var(--shadow-1);
}

.workflow-step {
  font-size: 12px;
  color: var(--ps-blue);
  letter-spacing: 0.45px;
}

.download-card .btn {
  min-height: 44px;
  margin-top: 28px;
  padding: 10px 18px;
  font-size: 14px;
  letter-spacing: 0.3px;
}

.doc-panel {
  display: grid;
  grid-template-columns: 1.3fr 0.7fr;
  gap: 32px;
  align-items: start;
  padding: 40px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.05);
  box-shadow: var(--shadow-hero);
}

.doc-list {
  display: grid;
  gap: 16px;
}

.doc-item {
  padding: 16px 20px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  background: rgba(0, 0, 0, 0.4);
  font-size: 16px;
  color: rgba(255, 255, 255, 0.86);
}

.page-hero-inner {
  padding: 96px 0 112px;
}

.docs-shell {
  display: grid;
  gap: 24px;
}

.docs-meta,
.docs-content {
  border: 1px solid rgba(0, 0, 0, 0.06);
}

.docs-main-title,
.markdown-body h1,
.markdown-body h2,
.markdown-body h3,
.markdown-body h4 {
  margin: 16px 0 0;
  line-height: 1.25;
  font-weight: 300;
}

.docs-main-copy,
.docs-loading {
  margin: 12px 0 0;
  font-size: 16px;
  line-height: 1.75;
  color: var(--muted);
}

.docs-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.docs-meta-btn {
  flex-shrink: 0;
}

.docs-content {
  padding: 40px;
}

.docs-loading {
  margin: 0;
}

.docs-error {
  color: #b42318;
}

.docs-notice {
  padding: 28px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, rgba(0, 112, 204, 0.08), rgba(30, 174, 219, 0.12));
}

.docs-notice h2 {
  margin: 0;
  font-size: 28px;
  line-height: 1.25;
  font-weight: 300;
}

.docs-notice p {
  margin: 16px 0 0;
  font-size: 17px;
  line-height: 1.8;
}

.docs-notice-error {
  background: linear-gradient(135deg, rgba(180, 35, 24, 0.1), rgba(242, 132, 130, 0.18));
}

.markdown-body > :first-child {
  margin-top: 0;
}

.markdown-body h1 {
  font-size: clamp(32px, 4vw, 44px);
}

.markdown-body h2 {
  font-size: clamp(26px, 3vw, 34px);
  margin-top: 40px;
}

.markdown-body h3 {
  font-size: 24px;
  margin-top: 28px;
}

.markdown-body h4 {
  font-size: 20px;
  margin-top: 24px;
}

.markdown-body p,
.markdown-body li,
.markdown-body blockquote {
  font-size: 17px;
  line-height: 1.8;
}

.markdown-body p,
.markdown-body ul,
.markdown-body ol,
.markdown-body blockquote {
  margin: 16px 0 0;
}

.markdown-body ul,
.markdown-body ol {
  padding-left: 24px;
}

.markdown-body li + li {
  margin-top: 8px;
}

.markdown-body blockquote {
  padding: 18px 20px;
  border-left: 4px solid var(--ps-blue);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: linear-gradient(135deg, rgba(0, 112, 204, 0.08), rgba(30, 174, 219, 0.12));
}

.markdown-body code {
  padding: 2px 6px;
  border-radius: 6px;
  background: rgba(0, 0, 0, 0.06);
  font-family: Consolas, "Courier New", monospace;
  font-size: 0.92em;
}

.markdown-body pre {
  overflow-x: auto;
  margin: 18px 0 0;
  padding: 18px;
  border-radius: var(--radius-md);
  background: #10151b;
  color: #eaf2ff;
}

.markdown-body pre code {
  padding: 0;
  background: transparent;
  color: inherit;
}

.markdown-body a {
  color: var(--ps-blue);
  text-decoration: underline;
}

.site-footer {
  background: var(--ps-blue);
  color: var(--white);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr 0.8fr 0.8fr;
  gap: 40px;
  padding: 56px 0;
}

.footer-brand {
  font-size: 24px;
  line-height: 1.3;
}

.footer-copy {
  max-width: 420px;
  font-size: 16px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.86);
}

.footer-title {
  font-size: 14px;
  font-weight: 500;
}

.footer-links {
  display: grid;
  gap: 12px;
  margin-top: 16px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.86);
}

.footer-text-item {
  display: block;
}

.footer-bottom {
  padding: 20px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  text-align: center;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.75);
}

@media (max-width: 1180px) {
  .grid-4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .doc-panel {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 920px) {
  .nav {
    display: none;
  }

  .grid-3,
  .grid-2 {
    grid-template-columns: 1fr;
  }

  .header-inner {
    min-height: 72px;
    flex-wrap: wrap;
    padding: 14px 0;
  }

  .header-actions {
    width: 100%;
    justify-content: flex-end;
  }

  .hero-inner {
    padding: 96px 0 112px;
  }

  .docs-meta {
    align-items: flex-start;
    flex-direction: column;
  }

  .section {
    padding: 72px 0;
  }
}

@media (max-width: 640px) {
  .container {
    width: min(calc(100% - 24px), var(--container));
  }

  .header-actions {
    justify-content: flex-start;
  }

  .btn,
  .btn-secondary,
  .btn-primary {
    width: 100%;
  }

  .btn-ghost {
    width: auto;
  }

.hero-stat {
  margin-top: 16px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.72);
  font-weight: 300;
  letter-spacing: 0.2px;
}

.hero-actions {
    flex-direction: column;
  }

  .grid-4 {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 56px 0;
  }

  .card,
  .workflow-card,
  .doc-panel,
  .docs-content {
    padding: 24px;
  }

  .hero-inner {
    padding: 80px 0 92px;
  }
}