:root {
  /* Strict Brand VI Light Palette */
  --hz-paper: #F6F5F0;
  --hz-paper-deep: #EFECE6;
  --hz-card: #FFFFFF;
  --hz-ink: #13141A;
  --hz-ink-soft: #2A2C36;
  --hz-muted: #686B78;
  --hz-subtle: #9497A3;
  --hz-border: #E6E4DE;
  --hz-border-strong: #D5D2C9;

  /* Brand VI Electric Purple Accent */
  --hz-purple: #5B3EFF;
  --hz-purple-hover: #4B2EE8;
  --hz-purple-soft: #F2EFFF;
  --hz-purple-border: #DDD4FF;
  --hz-purple-ink: #3D22D6;

  --hz-max: 1240px;
  --hz-radius-xl: 28px;
  --hz-radius-lg: 20px;
  --hz-radius-md: 14px;
  --hz-radius-sm: 10px;

  --hz-shadow-sm: 0 4px 20px -6px rgba(19, 20, 26, 0.04);
  --hz-shadow-md: 0 20px 50px -24px rgba(19, 20, 26, 0.07);
  --hz-shadow-lg: 0 32px 72px -28px rgba(19, 20, 26, 0.10);

  --font-sans: "Plus Jakarta Sans", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background: var(--hz-paper);
  color: var(--hz-ink);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  margin: 0;
  background-color: var(--hz-paper);
  color: var(--hz-ink);
  line-height: 1.65;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.18s ease, background-color 0.18s ease, border-color 0.18s ease, transform 0.18s ease, box-shadow 0.18s ease;
}

button,
input,
select,
textarea {
  font: inherit;
}

/* ==================== Top Navigation ==================== */
.v4-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(246, 245, 240, 0.86);
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  border-bottom: 1px solid rgba(19, 20, 26, 0.06);
}

.v4-nav {
  max-width: var(--hz-max);
  margin: 0 auto;
  height: 76px;
  padding: 0 36px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.v4-brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  color: var(--hz-ink);
  font-weight: 800;
  font-size: 18px;
  letter-spacing: -0.025em;
  flex-shrink: 0;
}

.v4-brand-mark {
  width: 36px;
  height: 23px;
  display: block;
}

.v4-brand-dot {
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: var(--hz-purple);
  display: inline-block;
}

.v4-brand-sub {
  font-size: 13.5px;
  font-weight: 600;
  color: var(--hz-muted);
  padding-left: 10px;
  border-left: 1px solid var(--hz-border-strong);
  letter-spacing: 0;
}

.v4-links {
  display: flex;
  align-items: center;
  gap: 6px;
}

.v4-links a {
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  color: var(--hz-muted);
  position: relative;
}

.v4-links a:hover {
  color: var(--hz-ink);
}

.v4-links a.active {
  color: var(--hz-ink);
  font-weight: 700;
  background: rgba(19, 20, 26, 0.05);
}

.v4-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.v4-lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 5px 12px;
  border-radius: 999px;
  border: 1px solid var(--hz-border);
  background: var(--hz-card);
  font-size: 12px;
  font-weight: 700;
  color: var(--hz-muted);
}

.v4-lang-switch b {
  color: var(--hz-purple);
}

.v4-btn-console {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  height: 40px;
  padding: 0 20px;
  border-radius: 999px;
  background: var(--hz-ink);
  color: #FFFFFF;
  font-size: 13.5px;
  font-weight: 650;
}

.v4-btn-console:hover {
  background: var(--hz-purple);
  transform: translateY(-1px);
}

/* ==================== Layout & Generous Whitespace Rhythm ==================== */
.v4-container {
  max-width: var(--hz-max);
  margin: 0 auto;
  padding: 0 36px;
}

.v4-section {
  padding: 108px 0;
  border-top: 1px solid rgba(19, 20, 26, 0.06);
}

.v4-sec-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 48px;
}

.v4-sec-title {
  margin: 0;
  font-size: clamp(26px, 3vw, 36px);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.2;
  color: var(--hz-ink);
}

.v4-note {
  margin: 12px 0 0;
  font-size: 15px;
  color: var(--hz-muted);
  max-width: 58ch;
  line-height: 1.7;
}

.v4-btn-primary,
.v4-btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 48px;
  padding: 0 28px;
  border-radius: 999px;
  font-size: 14.5px;
  font-weight: 680;
  cursor: pointer;
}

.v4-btn-primary {
  background: var(--hz-purple);
  color: #FFFFFF;
  box-shadow: 0 12px 28px -10px rgba(91, 62, 255, 0.45);
}

.v4-btn-primary:hover {
  background: var(--hz-purple-hover);
  transform: translateY(-1px);
}

.v4-btn-secondary {
  background: var(--hz-card);
  color: var(--hz-ink);
  border: 1px solid var(--hz-border-strong);
}

.v4-btn-secondary:hover {
  border-color: var(--hz-ink);
  transform: translateY(-1px);
}

/* ==================== Hero Section (Gallery-First, Minimalist) ==================== */
.v4-hero {
  padding: 84px 0 96px;
}

.v4-hero-center {
  text-align: center;
  max-width: 980px;
  margin: 0 auto 56px;
}

.v4-h1 {
  margin: 0;
  font-size: clamp(34px, 4.1vw, 52px);
  font-weight: 840;
  letter-spacing: -0.03em;
  line-height: 1.16;
  color: var(--hz-ink);
}

.v4-h1 .purple-grad {
  color: var(--hz-purple);
}

.v4-sub {
  margin: 22px auto 0;
  max-width: 54ch;
  font-size: 16.5px;
  color: var(--hz-muted);
  line-height: 1.75;
}

.v4-hero-ctas {
  margin-top: 34px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 14px;
}

/* Full-Bleed Cinema Showcase Stage */
.v4-stage-wrap {
  background: var(--hz-card);
  border: 1px solid var(--hz-border);
  border-radius: var(--hz-radius-xl);
  padding: 18px;
  box-shadow: var(--hz-shadow-lg);
}

.stage-top-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 4px 10px 16px;
}

.stage-tabs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
}

.stage-tab {
  appearance: none;
  border: 0;
  background: transparent;
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 13.5px;
  font-weight: 650;
  color: var(--hz-muted);
  cursor: pointer;
  transition: all 0.18s ease;
}

.stage-tab:hover {
  color: var(--hz-ink);
}

.stage-tab.active {
  color: var(--hz-purple);
  background: var(--hz-purple-soft);
  font-weight: 720;
}

.stage-Quicklinks {
  display: flex;
  align-items: center;
  gap: 18px;
  font-size: 13px;
  color: var(--hz-muted);
}

.stage-Quicklinks code {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--hz-ink);
  font-weight: 600;
}

/* Single Expansive Widescreen Canvas */
.hero-canvas-full {
  position: relative;
  height: 520px;
  border-radius: 20px;
  overflow: hidden;
  background: #0D0E12;
}

.hero-canvas-full > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.hero-canvas-full:hover > img {
  transform: scale(1.015);
}

.hero-canvas-full::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(13, 14, 18, 0) 55%, rgba(13, 14, 18, 0.82) 100%);
  pointer-events: none;
}

.hero-Prompt-dock {
  position: absolute;
  left: 24px;
  right: 24px;
  bottom: 24px;
  z-index: 3;
  padding: 16px 22px;
  border-radius: 16px;
  background: rgba(19, 20, 26, 0.72);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.12);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  color: #FFFFFF;
}

.hero-prompt-text {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.92);
  min-width: 0;
}

.hero-prompt-text span {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.hero-prompt-tag {
  flex-shrink: 0;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--hz-purple);
  color: #FFFFFF;
  font-size: 11.5px;
  font-weight: 700;
}

.hero-thumbs-row {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.hero-thumb-btn {
  width: 48px;
  height: 34px;
  padding: 0;
  border-radius: 8px;
  border: 1.5px solid rgba(255, 255, 255, 0.25);
  overflow: hidden;
  background: #000;
  cursor: pointer;
  opacity: 0.65;
  transition: all 0.18s ease;
}

.hero-thumb-btn img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.hero-thumb-btn.active,
.hero-thumb-btn:hover {
  opacity: 1;
  border-color: #FFFFFF;
  transform: translateY(-1px);
}

/* ==================== Clean Vendor Logo Bar ==================== */
.vendor-strip-section {
  padding-top: 44px;
}

.vendor-strip-label {
  text-align: center;
  font-size: 13px;
  font-weight: 600;
  color: var(--hz-muted);
  margin-bottom: 22px;
}

.vendor-logo-strip {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 12px;
}

.vendor-pill {
  height: 58px;
  padding: 0 18px;
  border-radius: 14px;
  background: var(--hz-card);
  border: 1px solid var(--hz-border);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-size: 14px;
  font-weight: 700;
  color: var(--hz-ink);
  transition: all 0.2s ease;
}

.vendor-pill:hover {
  border-color: var(--hz-purple-border);
  transform: translateY(-2px);
  box-shadow: var(--hz-shadow-sm);
}

.vendor-pill img {
  width: 22px;
  height: 22px;
  object-fit: contain;
  flex-shrink: 0;
}

/* ==================== 3 Gallery Feature Cards (Minimalist) ==================== */
.v4-cards-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px;
}

.v4-card {
  background: var(--hz-card);
  border: 1px solid var(--hz-border);
  border-radius: var(--hz-radius-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 22px;
  box-shadow: var(--hz-shadow-sm);
  transition: transform 0.24s ease, box-shadow 0.24s ease;
}

.v4-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--hz-shadow-md);
}

.card-visual {
  height: 240px;
  border-radius: 14px;
  overflow: hidden;
  position: relative;
  background: #13141A;
}

.card-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* Clean Minimalist Telemetry Display inside Card 3 */
.cv-ledger {
  background: #13141A;
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 14px;
}

.cv-ledger-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 13px;
  font-weight: 600;
  color: #F4F3F8;
}

.cv-ledger-ok {
  color: #4ADE80;
  font-size: 12px;
}

.cv-ledger-run {
  color: #A99BFF;
  font-size: 12px;
}

.v4-card h3 {
  margin: 0 0 8px;
  font-size: 20px;
  font-weight: 780;
  letter-spacing: -0.02em;
  color: var(--hz-ink);
}

.v4-card p {
  margin: 0;
  font-size: 14.5px;
  color: var(--hz-muted);
  line-height: 1.7;
}

/* ==================== Curated Model Bento Grid (Replaces Dense Table) ==================== */
.model-bento-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}

.model-bento-card {
  background: var(--hz-card);
  border: 1px solid var(--hz-border);
  border-radius: var(--hz-radius-lg);
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 24px;
  transition: all 0.22s ease;
}

.model-bento-card:hover {
  border-color: var(--hz-purple-border);
  transform: translateY(-3px);
  box-shadow: var(--hz-shadow-md);
}

.mbc-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.mbc-vendor {
  display: flex;
  align-items: center;
  gap: 12px;
}

.mbc-logo {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--hz-paper);
  border: 1px solid var(--hz-border);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.mbc-logo img {
  width: 24px;
  height: 24px;
  object-fit: contain;
}

.mbc-title {
  margin: 0;
  font-size: 17px;
  font-weight: 780;
  color: var(--hz-ink);
}

.mbc-sub {
  font-size: 12.5px;
  color: var(--hz-muted);
  margin-top: 2px;
}

.mbc-desc {
  margin: 0;
  font-size: 14px;
  color: var(--hz-muted);
  line-height: 1.68;
}

.mbc-foot {
  padding-top: 16px;
  border-top: 1px solid var(--hz-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12.5px;
  color: var(--hz-muted);
}

.mbc-foot strong {
  color: var(--hz-ink);
  font-weight: 680;
}

.md-cat-badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 11px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
  white-space: nowrap;
}

.md-cat-image {
  background: var(--hz-purple-soft);
  color: var(--hz-purple-ink);
}

.md-cat-video {
  background: #EAF2FF;
  color: #1D4ED8;
}

.md-cat-vision {
  background: #F1F2F4;
  color: var(--hz-ink-soft);
}

/* ==================== Clean 2-Column API Split Section ==================== */
.api-split-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.25fr);
  gap: 48px;
  align-items: center;
}

.api-domain-stack {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-top: 28px;
}

.api-domain-card {
  padding: 20px 22px;
  border-radius: 16px;
  background: var(--hz-card);
  border: 1px solid var(--hz-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.api-domain-card strong {
  display: block;
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--hz-ink);
}

.api-domain-card span {
  font-size: 13px;
  color: var(--hz-muted);
}

/* Code Card */
.vi-code-card {
  background: var(--hz-card);
  border: 1px solid var(--hz-border);
  border-radius: var(--hz-radius-lg);
  padding: 22px;
  box-shadow: var(--hz-shadow-md);
}

.vi-code-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 14px;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--hz-border);
}

.vi-code-tabs-left,
.vi-code-langs {
  display: flex;
  align-items: center;
  gap: 6px;
}

.vi-code-tabs-left button,
.vi-code-langs button {
  appearance: none;
  border: 0;
  background: transparent;
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 680;
  color: var(--hz-muted);
  cursor: pointer;
}

.vi-code-tabs-left button[aria-selected="true"],
.vi-code-langs button[aria-selected="true"] {
  color: var(--hz-purple);
  background: var(--hz-purple-soft);
}

.vi-code-well {
  position: relative;
  border-radius: 14px;
  background: #13141A;
  padding: 24px;
}

.vi-copy-btn {
  position: absolute;
  top: 14px;
  right: 14px;
  height: 32px;
  padding: 0 12px;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.08);
  color: #F4F3F8;
  font-size: 12px;
  font-weight: 650;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
}

.vi-copy-btn:hover {
  border-color: #A99BFF;
  color: #FFFFFF;
}

.vi-code-pre {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.75;
  color: #EDEBF8;
  overflow-x: auto;
  white-space: pre;
}

.vi-code-foot {
  margin-top: 14px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: 12.5px;
  color: var(--hz-muted);
}

.vi-code-foot a {
  color: var(--hz-purple);
  font-weight: 700;
}

/* ==================== Inner Page Layouts (Spacious & Clean) ==================== */
/* 1. models.html Catalog */
.catalog-shell {
  max-width: var(--hz-max);
  margin: 0 auto;
  padding: 56px 36px 108px;
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  gap: 44px;
  align-items: start;
}

.catalog-sidebar {
  position: sticky;
  top: 100px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.catalog-search-box {
  position: relative;
}

.catalog-search-box input {
  width: 100%;
  height: 44px;
  padding: 0 14px 0 38px;
  border-radius: 12px;
  border: 1px solid var(--hz-border-strong);
  background: var(--hz-card);
  font-size: 13.5px;
  color: var(--hz-ink);
  outline: none;
}

.catalog-search-box input:focus {
  border-color: var(--hz-purple);
}

.catalog-search-box svg {
  position: absolute;
  left: 13px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--hz-muted);
}

.catalog-filter-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.catalog-filter-label {
  font-size: 12px;
  font-weight: 700;
  color: var(--hz-muted);
  padding: 0 10px 6px;
}

.catalog-side-btn {
  appearance: none;
  border: 0;
  background: transparent;
  padding: 10px 14px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13.5px;
  font-weight: 650;
  color: var(--hz-muted);
  cursor: pointer;
  text-align: left;
}

.catalog-side-btn:hover {
  color: var(--hz-ink);
  background: rgba(19, 20, 26, 0.04);
}

.catalog-side-btn.active {
  background: var(--hz-card);
  color: var(--hz-purple);
  font-weight: 750;
  box-shadow: var(--hz-shadow-sm);
}

.catalog-cards-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

.catalog-vendor-card {
  background: var(--hz-card);
  border: 1px solid var(--hz-border);
  border-radius: var(--hz-radius-lg);
  padding: 26px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 20px;
  transition: all 0.2s ease;
}

.catalog-vendor-card:hover {
  border-color: var(--hz-purple-border);
  transform: translateY(-2px);
  box-shadow: var(--hz-shadow-md);
}

.cvc-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.cvc-brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.cvc-logo {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--hz-paper);
  border: 1px solid var(--hz-border);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.cvc-logo img {
  width: 24px;
  height: 24px;
  object-fit: contain;
}

.cvc-title {
  margin: 0;
  font-size: 16.5px;
  font-weight: 780;
  color: var(--hz-ink);
}

.cvc-maker {
  font-size: 12.5px;
  color: var(--hz-muted);
  margin-top: 2px;
}

.cvc-desc {
  margin: 0;
  font-size: 14px;
  color: var(--hz-muted);
  line-height: 1.65;
}

.cvc-foot {
  padding-top: 14px;
  border-top: 1px solid var(--hz-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12.5px;
  color: var(--hz-muted);
}

/* 2. connect.html Docs Layout */
.docs-shell {
  max-width: var(--hz-max);
  margin: 0 auto;
  padding: 56px 36px 108px;
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 48px;
  align-items: start;
}

.docs-toc {
  position: sticky;
  top: 100px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.docs-toc-title {
  font-size: 12px;
  font-weight: 700;
  color: var(--hz-muted);
  padding: 0 12px 8px;
}

.docs-toc a {
  padding: 9px 12px;
  border-radius: 10px;
  font-size: 13.5px;
  font-weight: 650;
  color: var(--hz-muted);
}

.docs-toc a:hover,
.docs-toc a.active {
  color: var(--hz-purple);
  background: var(--hz-card);
}

.docs-main {
  display: flex;
  flex-direction: column;
  gap: 36px;
}

.docs-section-card {
  background: var(--hz-card);
  border: 1px solid var(--hz-border);
  border-radius: var(--hz-radius-lg);
  padding: 36px;
}

.docs-endpoint-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
  margin-top: 24px;
}

.docs-endpoint-box {
  padding: 24px;
  border-radius: 16px;
  background: var(--hz-paper);
  border: 1px solid var(--hz-border);
}

.docs-endpoint-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 12px;
}

.docs-endpoint-url {
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 760;
  color: var(--hz-ink);
  margin-bottom: 6px;
}

/* 3. faq.html Layout */
.faq-hero-banner {
  max-width: var(--hz-max);
  margin: 48px auto 0;
  padding: 0 36px;
}

.faq-hero-box {
  background: var(--hz-card);
  border: 1px solid var(--hz-border);
  border-radius: var(--hz-radius-lg);
  padding: 36px 40px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.faq-search-wrap {
  position: relative;
  width: min(360px, 100%);
}

.faq-search-wrap input {
  width: 100%;
  height: 44px;
  padding: 0 16px 0 40px;
  border-radius: 999px;
  border: 1px solid var(--hz-border-strong);
  background: var(--hz-paper);
  font-size: 13.5px;
  color: var(--hz-ink);
  outline: none;
}

.faq-search-wrap svg {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--hz-muted);
}

.faq-shell {
  max-width: var(--hz-max);
  margin: 0 auto;
  padding: 36px 36px 108px;
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 44px;
  align-items: start;
}

.faq-cat-nav {
  position: sticky;
  top: 100px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.faq-cat-btn {
  appearance: none;
  border: 0;
  background: transparent;
  padding: 10px 14px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13.5px;
  font-weight: 650;
  color: var(--hz-muted);
  cursor: pointer;
}

.faq-cat-btn.active {
  background: var(--hz-card);
  color: var(--hz-purple);
  font-weight: 750;
}

.faq-list-stack {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.v4-faq-item {
  background: var(--hz-card);
  border: 1px solid var(--hz-border);
  border-radius: 16px;
  padding: 22px 26px;
}

.v4-faq-item summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-size: 16px;
  font-weight: 740;
  color: var(--hz-ink);
}

.v4-faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-q-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.faq-num {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--hz-purple);
}

.faq-plus {
  width: 26px;
  height: 26px;
  border-radius: 999px;
  border: 1px solid var(--hz-border);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--hz-muted);
  transition: transform 0.2s ease;
}

.v4-faq-item[open] .faq-plus {
  transform: rotate(45deg);
  color: var(--hz-purple);
  border-color: var(--hz-purple-border);
}

.v4-faq-item p {
  margin: 14px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--hz-border);
  font-size: 14.5px;
  color: var(--hz-muted);
  line-height: 1.75;
}

/* 4. about.html */
.about-shell {
  max-width: var(--hz-max);
  margin: 0 auto;
  padding: 56px 36px 108px;
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.about-bento-top {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 28px;
}

.about-manifesto-card {
  background: var(--hz-card);
  border: 1px solid var(--hz-border);
  border-radius: var(--hz-radius-lg);
  padding: 40px;
}

.about-swatch-card {
  background: #13141A;
  color: #FFFFFF;
  border-radius: var(--hz-radius-lg);
  padding: 36px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 20px;
}

.swatch-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.swatch-pill {
  padding: 12px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.06);
  display: flex;
  align-items: center;
  gap: 10px;
}

.swatch-dot {
  width: 24px;
  height: 24px;
  border-radius: 6px;
  flex-shrink: 0;
}

.swatch-pill strong {
  display: block;
  font-size: 12.5px;
  color: #FFFFFF;
}

.swatch-pill span {
  font-family: var(--font-mono);
  font-size: 11px;
  color: rgba(255, 255, 255, 0.6);
}

/* ==================== Bottom Footer ==================== */
.v4-cta-band {
  background: #13141A;
  color: #FFFFFF;
}

.v4-cta-inner {
  max-width: var(--hz-max);
  margin: 0 auto;
  padding: 64px 36px 40px;
}

.cta-strip-grid {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  padding-bottom: 44px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.cta-strip-copy h2 {
  margin: 0;
  font-size: 26px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: #FFFFFF;
}

.cta-strip-copy p {
  margin: 8px 0 0;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
}

.cta-strip-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}

.v4-btn-dark-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 48px;
  padding: 0 24px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(255, 255, 255, 0.04);
  color: #FFFFFF;
  font-size: 14px;
  font-weight: 650;
}

.v4-btn-dark-ghost:hover {
  background: rgba(255, 255, 255, 0.1);
}

.v4-footer {
  padding-top: 28px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
}

.v4-footer-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 24px;
}

.v4-footer-links a:hover {
  color: #FFFFFF;
}

@media (max-width: 1080px) {
  .vendor-logo-strip {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .v4-cards-3,
  .model-bento-grid,
  .api-split-layout,
  .catalog-shell,
  .docs-shell,
  .faq-shell,
  .about-bento-top {
    grid-template-columns: minmax(0, 1fr);
  }
  .catalog-cards-grid,
  .docs-endpoint-grid {
    grid-template-columns: minmax(0, 1fr);
  }
  .v4-links {
    display: none;
  }
}

/* Native integration: narrow screens retain navigation and fit long domains. */
.v4-mobile-menu { display: none; position: relative; }
@media (max-width: 1080px) {
  .v4-mobile-menu { display: block; }
  .v4-mobile-menu summary { cursor: pointer; list-style: none; padding: 9px 10px; font-size: 13px; border: 1px solid var(--hz-border); border-radius: 10px; background: var(--hz-card); }
  .v4-mobile-menu summary::-webkit-details-marker { display: none; }
  .v4-mobile-menu nav { position: absolute; right: 0; top: calc(100% + 10px); width: 188px; padding: 8px; background: var(--hz-card); border: 1px solid var(--hz-border); border-radius: 14px; box-shadow: 0 12px 30px rgb(19 20 26 / 10%); z-index: 40; }
  .v4-mobile-menu nav a { display: block; padding: 10px 12px; font-size: 14px; border-radius: 8px; }
  .v4-mobile-menu nav a:hover { background: var(--hz-bg); }
}
@media (max-width: 640px) {
  .v4-nav { padding-inline: 18px; gap: 10px; }
  .v4-brand { gap: 8px; }
  .v4-brand-sub, .v4-brand-dot { display: none; }
  .v4-actions { gap: 8px; }
  .v4-btn-console { padding-inline: 14px; font-size: 12.5px; }
  .v4-h1 { font-size: clamp(24px, 7.1vw, 30px); }
  .v4-h1 .purple-grad { display: block; margin-top: .2em; }
  .stage-Quicklinks { flex-direction: column; align-items: flex-start; gap: 5px; }
  .stage-Quicklinks > span { display: flex; flex-wrap: wrap; align-items: baseline; gap: 8px; font-size: 12px; }
  .stage-Quicklinks > span:nth-child(2) { display: none; }
  .stage-Quicklinks code { font-size: 12px; overflow-wrap: anywhere; }
  .api-domain-card { flex-wrap: wrap; align-items: flex-start; padding: 18px; }
  .api-domain-card > div { min-width: 0; flex: 1 1 100%; }
  .api-domain-card strong { font-size: 12.5px; overflow-wrap: anywhere; }
  .docs-section-card { padding: 22px 18px; }
  .docs-endpoint-box { padding: 16px; min-width: 0; }
  .docs-endpoint-top { flex-wrap: wrap; }
  .docs-endpoint-url { font-size: 12px; overflow-wrap: anywhere; word-break: break-word; }
  .vi-code-card { padding: 14px; min-width: 0; }
  .vi-code-header { flex-wrap: wrap; gap: 12px; }
  .vi-code-langs, .vi-code-tabs-left { max-width: 100%; flex-wrap: wrap; }
}