/* TapMakerWork 官网 — design-system tokens + 明暗主题 */
:root {
  --color-primary: #7c3aed;
  --color-secondary: #a78bfa;
  --color-accent: #ec4899;
  --color-background: #faf5ff;
  --color-foreground: #4c1d95;
  --color-card: #ffffff;
  --color-muted: #eceef9;
  --color-muted-foreground: #475569;
  --color-border: #ddd6fe;
  --color-deep: #1a0a33;
  --color-deep-2: #2a1250;
  --color-on-deep: #f3e8ff;
  --color-hit: #a78bfa;
  --color-live: #34d399;
  --color-code-bg: rgba(124, 58, 237, 0.08);
  --color-nav-bg: rgba(250, 245, 255, 0.88);
  --color-badge-bg: rgba(255, 255, 255, 0.7);
  --color-btn-ghost-bg: rgba(255, 255, 255, 0.08);
  --color-btn-ghost-border: rgba(255, 255, 255, 0.18);
  --color-accent-ink: #ffffff;
  --color-accent-solid: #db2777;
  --color-link: #6d28d9;
  --shadow-md: 0 4px 16px rgba(76, 29, 149, 0.08);
  --shadow-lg: 0 16px 40px rgba(76, 29, 149, 0.14);

  --font-sans: "IBM Plex Sans", "PingFang SC", "HarmonyOS Sans SC",
    "Microsoft YaHei", "Segoe UI", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", "Menlo", "Consolas",
    "PingFang SC", ui-monospace, monospace;

  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 12px;
  --space-lg: 16px;
  --space-xl: 24px;
  --space-2xl: 32px;
  --space-3xl: 48px;
  --space-4xl: 72px;

  --radius: 8px;
  --radius-lg: 12px;
  --max: 1120px;
  --nav-h: 56px;
  color-scheme: light;
}

/* 暗色：手动选 dark，或系统偏好且未强制 light */
:root[data-theme="dark"] {
  --color-primary: #a78bfa;
  --color-secondary: #c4b5fd;
  --color-accent: #f472b6;
  --color-background: #120a22;
  --color-foreground: #ede9fe;
  --color-card: #1c1233;
  --color-muted: #24183f;
  --color-muted-foreground: #cfc6e0;
  --color-border: #3b2a6b;
  --color-deep: #0c0618;
  --color-deep-2: #1a0f30;
  --color-on-deep: #f5f3ff;
  --color-hit: #a78bfa;
  --color-live: #34d399;
  --color-code-bg: rgba(167, 139, 250, 0.12);
  --color-nav-bg: rgba(18, 10, 34, 0.88);
  --color-badge-bg: rgba(28, 18, 51, 0.8);
  --color-accent-ink: #120a22;
  --color-accent-solid: #f472b6;
  --color-link: #c4b5fd;
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.45);
  color-scheme: dark;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]):not([data-theme="dark"]) {
    --color-primary: #a78bfa;
    --color-secondary: #c4b5fd;
    --color-accent: #f472b6;
    --color-background: #120a22;
    --color-foreground: #ede9fe;
    --color-card: #1c1233;
    --color-muted: #24183f;
    --color-muted-foreground: #cfc6e0;
    --color-border: #3b2a6b;
    --color-deep: #0c0618;
    --color-deep-2: #1a0f30;
    --color-on-deep: #f5f3ff;
    --color-hit: #a78bfa;
    --color-live: #34d399;
    --color-code-bg: rgba(167, 139, 250, 0.12);
    --color-nav-bg: rgba(18, 10, 34, 0.88);
    --color-badge-bg: rgba(28, 18, 51, 0.8);
    --color-accent-ink: #120a22;
    --color-accent-solid: #f472b6;
    --color-link: #c4b5fd;
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.35);
    --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.45);
    color-scheme: dark;
  }
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  color: var(--color-foreground);
  background: var(--color-background);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  transition: background-color 200ms ease, color 200ms ease;
}

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

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

a:focus-visible,
button:focus-visible,
.btn:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}

code {
  font-family: var(--font-mono);
  font-size: 0.92em;
  background: var(--color-code-bg);
  padding: 0.1em 0.35em;
  border-radius: 4px;
}

.container {
  width: min(100% - 40px, var(--max));
  margin-inline: auto;
}

/* ——— Nav ——— */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--nav-h);
  background: var(--color-nav-bg);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.nav-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 15px;
  letter-spacing: -0.02em;
  color: var(--color-foreground);
  flex-shrink: 0;
}

.brand-mark {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  border-radius: 7px;
  object-fit: contain;
  display: block;
  background: transparent;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 6px;
  min-width: 0;
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: 10px;
  border: 1px solid var(--color-border);
  background: var(--color-card);
  color: var(--color-muted-foreground);
  font-family: var(--font-mono);
  font-size: 12px;
  cursor: pointer;
  flex-shrink: 0;
  transition: border-color 160ms ease, color 160ms ease, background 160ms ease;
}

.theme-toggle:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
  background: var(--color-code-bg);
}

.theme-toggle .theme-icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.theme-toggle .theme-label {
  display: none;
}

.theme-toggle[data-mode="dark"] {
  color: #f5f3ff;
  border-color: #3b2a6b;
  background: #1a0f30;
}

.theme-toggle[data-mode="dark"]:hover {
  color: var(--color-secondary);
  border-color: var(--color-secondary);
}

.theme-toggle[data-mode="light"] {
  color: var(--color-primary);
  border-color: var(--color-border);
  background: var(--color-muted);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-muted-foreground);
  padding: 8px 12px;
  border-radius: 6px;
  transition: color 160ms ease, background 160ms ease;
}

.nav-links a:hover {
  color: var(--color-primary);
  background: var(--color-code-bg);
}

.nav-cta {
  margin-left: 8px;
}

.nav-toggle {
  display: none;
  border: 1px solid var(--color-border);
  background: var(--color-card);
  border-radius: 10px;
  width: 40px;
  height: 40px;
  cursor: pointer;
  color: var(--color-foreground);
  flex-shrink: 0;
}

/* ——— Buttons ——— */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: var(--radius);
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 15px;
  line-height: 1.2;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform 160ms ease, opacity 160ms ease, background 160ms ease,
    color 160ms ease, border-color 160ms ease;
  min-height: 44px;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
  opacity: 0.92;
}

.btn-primary {
  background: var(--color-accent-solid);
  color: var(--color-accent-ink);
  box-shadow: 0 8px 20px rgba(236, 72, 153, 0.28);
}

.btn-primary:hover {
  filter: brightness(1.08);
}

.btn-secondary {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn-secondary:hover {
  background: var(--color-code-bg);
}

.btn-ghost {
  background: var(--color-btn-ghost-bg);
  color: var(--color-on-deep);
  border-color: var(--color-btn-ghost-border);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.14);
}

.btn-sm {
  padding: 8px 14px;
  font-size: 13px;
  min-height: 36px;
}

/* ——— Hero ——— */
.hero {
  padding: var(--space-4xl) 0 var(--space-3xl);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 50% at 80% 20%, rgba(167, 139, 250, 0.22), transparent 60%),
    radial-gradient(ellipse 40% 40% at 10% 80%, rgba(236, 72, 153, 0.1), transparent 55%);
  pointer-events: none;
}

.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: var(--space-3xl);
  align-items: center;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin: 0 0 var(--space-md);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.eyebrow::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--color-accent);
}

.hero h1 {
  margin: 0 0 var(--space-lg);
  font-family: var(--font-mono);
  font-size: clamp(32px, 4.6vw, 48px);
  line-height: 1.15;
  letter-spacing: -0.03em;
  font-weight: 700;
  color: var(--color-foreground);
}

.hero-lead {
  margin: 0 0 var(--space-xl);
  font-size: 17px;
  color: var(--color-muted-foreground);
  max-width: 36em;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}

.badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.badge {
  font-family: var(--font-mono);
  font-size: 11px;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  background: var(--color-badge-bg);
  color: var(--color-muted-foreground);
}

.badge-warn {
  border-color: rgba(236, 72, 153, 0.4);
  color: var(--color-accent-solid);
  background: var(--color-code-bg);
}

/* links in body copy */
.section-head a,
.dl-card a,
.panel a:not(.link-chip),
.road-note a {
  color: var(--color-link);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.dl-card a {
  text-decoration: none;
}

.dl-card a:hover,
.section-head a:hover {
  color: var(--color-accent-solid);
}

/* ——— Runtime viewfinder ——— */
.viewfinder {
  background: linear-gradient(160deg, var(--color-deep) 0%, var(--color-deep-2) 100%);
  border-radius: 14px;
  border: 1px solid rgba(167, 139, 250, 0.35);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  color: var(--color-on-deep);
}

.vf-chrome {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 10px 12px;
  border-bottom: 1px solid rgba(167, 139, 250, 0.2);
  background: rgba(0, 0, 0, 0.25);
  font-family: var(--font-mono);
  font-size: 11px;
}

.vf-dots {
  display: flex;
  gap: 6px;
}

.vf-dots span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
}

.vf-dots span:nth-child(1) {
  background: #f87171;
}
.vf-dots span:nth-child(2) {
  background: #fbbf24;
}
.vf-dots span:nth-child(3) {
  background: #34d399;
}

.vf-title {
  opacity: 0.75;
}

.vf-live {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--color-live);
}

.vf-live::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-live);
  box-shadow: 0 0 0 0 rgba(52, 211, 153, 0.5);
  animation: pulse 1.8s ease-out infinite;
}

@keyframes pulse {
  0% {
    box-shadow: 0 0 0 0 rgba(52, 211, 153, 0.55);
  }
  70% {
    box-shadow: 0 0 0 8px rgba(52, 211, 153, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(52, 211, 153, 0);
  }
}

.vf-stage {
  position: relative;
  aspect-ratio: 16 / 11;
  background:
    linear-gradient(180deg, rgba(76, 29, 149, 0.15) 0%, rgba(0, 0, 0, 0.25) 100%),
    radial-gradient(circle at 30% 30%, rgba(124, 58, 237, 0.45), transparent 45%),
    radial-gradient(circle at 70% 70%, rgba(236, 72, 153, 0.25), transparent 40%),
    #12062a;
  overflow: hidden;
}

.scene-sky {
  position: absolute;
  inset: 0 0 40% 0;
  background: linear-gradient(180deg, #312e81 0%, #4c1d95 55%, transparent 100%);
  opacity: 0.55;
}

.scene-ground {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 38%;
  background: linear-gradient(180deg, #1e1b4b 0%, #0f0a24 100%);
  border-top: 1px solid rgba(167, 139, 250, 0.25);
}

.scene-hud-top {
  position: absolute;
  top: 14px;
  left: 14px;
  right: 14px;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}

.hp-bar {
  width: 96px;
  height: 8px;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.12);
  overflow: hidden;
}

.hp-bar i {
  display: block;
  width: 72%;
  height: 100%;
  background: linear-gradient(90deg, #f43f5e, #fb7185);
}

.coin-chip {
  font-family: var(--font-mono);
  font-size: 10px;
  padding: 4px 8px;
  border-radius: 999px;
  background: rgba(251, 191, 36, 0.15);
  color: #fbbf24;
  border: 1px solid rgba(251, 191, 36, 0.35);
}

.hit {
  position: absolute;
  border: 1px dashed var(--color-hit);
  border-radius: 4px;
  opacity: 0.55;
}

.hit-a {
  left: 12%;
  top: 28%;
  width: 28%;
  height: 14%;
}
.hit-b {
  right: 10%;
  bottom: 18%;
  width: 34%;
  height: 12%;
  opacity: 0.35;
}
.hit-c {
  left: 18%;
  bottom: 14%;
  width: 22%;
  height: 10%;
  opacity: 0.4;
}

.widget {
  position: absolute;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  border-radius: 6px;
}

.widget-title {
  left: 14%;
  top: 30%;
  width: 24%;
  height: 10%;
  color: #fde68a;
  background: rgba(251, 191, 36, 0.08);
  border: 1px solid rgba(251, 191, 36, 0.25);
}

.widget-btn {
  right: 12%;
  bottom: 20%;
  width: 30%;
  height: 8%;
  color: #fff;
  background: linear-gradient(135deg, #7c3aed, #a78bfa);
  box-shadow: 0 6px 16px rgba(124, 58, 237, 0.45);
}

.widget-icon {
  left: 20%;
  bottom: 16%;
  width: 18%;
  height: 7%;
  color: #c4b5fd;
  background: rgba(167, 139, 250, 0.15);
  border: 1px solid rgba(167, 139, 250, 0.35);
}

.selection {
  position: absolute;
  right: 10%;
  bottom: 17%;
  width: 34%;
  height: 14%;
  border: 1.5px solid var(--color-accent);
  border-radius: 4px;
  box-shadow: 0 0 0 1px rgba(236, 72, 153, 0.2), 0 0 20px rgba(236, 72, 153, 0.25);
  animation: select-breathe 2.4s ease-in-out infinite;
}

@keyframes select-breathe {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.72;
  }
}

.selection .handle {
  position: absolute;
  width: 8px;
  height: 8px;
  background: var(--color-accent);
  border: 1px solid #fff;
}

.selection .handle:nth-child(1) {
  left: -4px;
  top: -4px;
}
.selection .handle:nth-child(2) {
  right: -4px;
  top: -4px;
}
.selection .handle:nth-child(3) {
  left: -4px;
  bottom: -4px;
}
.selection .handle:nth-child(4) {
  right: -4px;
  bottom: -4px;
}

.vf-panel {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: rgba(167, 139, 250, 0.15);
  border-top: 1px solid rgba(167, 139, 250, 0.2);
}

.vf-panel-block {
  background: rgba(0, 0, 0, 0.28);
  padding: 10px 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.55;
}

.vf-panel-block strong {
  display: block;
  color: var(--color-secondary);
  font-weight: 500;
  margin-bottom: 4px;
  letter-spacing: 0.04em;
}

.vf-panel-block code {
  color: var(--color-on-deep);
  opacity: 0.9;
  background: transparent;
  padding: 0;
}

.vf-panel-block .ok {
  color: var(--color-live);
}

/* ——— Sections ——— */
.section {
  padding: var(--space-4xl) 0;
}

.section-head {
  margin-bottom: var(--space-2xl);
  max-width: 40em;
}

.section-kicker {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--color-primary);
  margin: 0 0 8px;
}

.section-head h2 {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: clamp(24px, 3vw, 32px);
  letter-spacing: -0.02em;
  line-height: 1.25;
}

.section-head p {
  margin: 0;
  color: var(--color-muted-foreground);
}

/* ——— Value strip ——— */
.values {
  padding: 0 0 var(--space-3xl);
}

.value-rail {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-card);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.value-item {
  padding: var(--space-xl);
  border-right: 1px solid var(--color-border);
}

.value-item:last-child {
  border-right: none;
}

.value-item .num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-accent-solid);
  margin-bottom: 8px;
}

.value-item h3 {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: -0.01em;
}

.value-item p {
  margin: 0;
  font-size: 14px;
  color: var(--color-muted-foreground);
}

/* ——— Feature rack ——— */
.features {
  background: linear-gradient(180deg, transparent, var(--color-muted), transparent);
}

.rack {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 1px solid var(--color-border);
}

.rack-row {
  display: grid;
  grid-template-columns: 88px 1fr 1.15fr;
  gap: var(--space-xl);
  padding: var(--space-xl) 0;
  border-bottom: 1px solid var(--color-border);
  align-items: start;
}

.rack-id {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-primary);
  padding-top: 4px;
}

.rack-row h3 {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 18px;
  letter-spacing: -0.02em;
}

.rack-row > div > p {
  margin: 0;
  color: var(--color-muted-foreground);
  font-size: 14px;
}

.rack-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}

.rack-list li {
  position: relative;
  padding-left: 14px;
  font-size: 14px;
  color: var(--color-foreground);
}

.rack-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 6px;
  height: 6px;
  border-radius: 1px;
  background: var(--color-secondary);
}

/* ——— Demo video ——— */
.demo-player {
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--color-border);
  background: var(--color-deep);
  box-shadow: var(--shadow-lg);
}

.demo-player video {
  display: block;
  width: 100%;
  height: auto;
  background: #000;
}

.demo-note {
  margin: var(--space-lg) 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-muted-foreground);
}

.demo-note a {
  color: var(--color-link);
  text-decoration: underline;
  text-underline-offset: 2px;
}

/* ——— Built-in tools ——— */
.tool-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-lg);
  margin-bottom: var(--space-xl);
}

.tool-card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  box-shadow: var(--shadow-md);
}

.tool-kicker {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--color-accent-solid);
}

.tool-card h3 {
  margin: 0 0 10px;
  font-size: 18px;
}

.tool-card > p {
  margin: 0 0 var(--space-md);
  font-size: 14px;
  color: var(--color-muted-foreground);
  line-height: 1.65;
}

.tool-card ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 6px;
}

.tool-card li {
  font-size: 13px;
  padding-left: 12px;
  position: relative;
  color: var(--color-foreground);
}

.tool-card li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 5px;
  height: 5px;
  border-radius: 1px;
  background: var(--color-accent-solid);
}

.tools-player {
  margin-top: 0;
}

/* ——— Roadmap ——— */
.road-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-lg);
}

.road-card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  box-shadow: var(--shadow-md);
}

.road-card h3 {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 15px;
}

.road-card > p {
  margin: 0 0 var(--space-md);
  font-size: 13px;
  color: var(--color-muted-foreground);
}

.road-card ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 6px;
}

.road-card li {
  font-size: 13px;
  padding-left: 12px;
  position: relative;
  color: var(--color-foreground);
}

.road-card li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 5px;
  height: 5px;
  border-radius: 1px;
  background: var(--color-accent-solid);
}

.road-note {
  margin-top: var(--space-xl);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-muted-foreground);
  line-height: 1.7;
}

/* ——— Architecture ——— */
.arch-panel {
  background: var(--color-deep);
  color: var(--color-on-deep);
  border-radius: 14px;
  padding: var(--space-2xl);
  border: 1px solid rgba(167, 139, 250, 0.25);
  overflow-x: auto;
}

.arch-flow {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
  min-width: 280px;
}

.arch-node {
  width: min(100%, 420px);
  text-align: center;
  padding: 14px 18px;
  border-radius: 8px;
  border: 1px solid rgba(167, 139, 250, 0.45);
  background: rgba(255, 255, 255, 0.05);
  font-family: var(--font-mono);
  font-size: 13px;
}

.arch-node.primary {
  border-color: var(--color-secondary);
  background: rgba(124, 58, 237, 0.25);
  color: #fff;
  font-weight: 600;
}

.arch-node.official {
  border-style: dashed;
  opacity: 0.9;
}

.arch-arrow {
  width: 1px;
  height: 22px;
  background: rgba(167, 139, 250, 0.45);
  position: relative;
}

.arch-arrow::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%);
  border: 5px solid transparent;
  border-top-color: rgba(167, 139, 250, 0.7);
}

.arch-split {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  width: min(100%, 520px);
}

.arch-split .arch-node {
  width: 100%;
  font-size: 11px;
  padding: 10px;
}

.arch-note {
  margin: var(--space-xl) 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  color: rgba(243, 232, 255, 0.65);
  text-align: center;
}

/* ——— Download ——— */
.download {
  background: var(--color-muted);
}

.dl-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: var(--space-xl);
  align-items: stretch;
}

.dl-main {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  box-shadow: var(--shadow-md);
}

.dl-main h3 {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 20px;
}

.dl-main > p {
  margin: 0 0 var(--space-xl);
  color: var(--color-muted-foreground);
  font-size: 14px;
}

.dl-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: var(--space-xl);
}

.dl-meta {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-muted-foreground);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-border);
}

.dl-detected {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 var(--space-md);
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  background: var(--color-code-bg);
  color: var(--color-primary);
}

.dl-detected::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-live);
  flex-shrink: 0;
}

.dl-detected[data-state="warn"]::before {
  background: var(--color-accent-solid);
}

.dl-platforms {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: var(--space-xl);
}

.dl-plat {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-background);
  padding: var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: border-color 160ms ease, box-shadow 160ms ease;
}

.dl-plat.is-recommended {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 1px var(--color-primary);
}

.dl-plat-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.dl-plat h4 {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
}

.dl-plat-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  padding: 2px 6px;
  border-radius: 4px;
  background: var(--color-muted);
  color: var(--color-muted-foreground);
}

.dl-plat p {
  margin: 0;
  font-size: 12px;
  color: var(--color-muted-foreground);
  flex: 1;
}

.dl-plat .dl-file {
  word-break: break-all;
}

.dl-plat .btn {
  align-self: flex-start;
  margin-top: 4px;
}

.dl-plat.is-recommended .btn {
  background: var(--color-accent-solid);
  color: var(--color-accent-ink);
  border-color: transparent;
}

.dl-quote {
  border-left: 3px solid var(--color-accent-solid);
  padding-left: 12px;
  color: var(--color-foreground) !important;
  font-size: 13px !important;
}

.dl-side {
  display: grid;
  gap: 12px;
}

.dl-card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
}

.dl-card h4 {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 14px;
}

.dl-card p {
  margin: 0;
  font-size: 13px;
  color: var(--color-muted-foreground);
}

.dl-card a {
  color: var(--color-primary);
  font-weight: 600;
  font-size: 13px;
}

.dl-card a:hover {
  color: var(--color-accent-solid);
}

/* ——— Community / boundary ——— */
.split-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
}

.panel {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  box-shadow: var(--shadow-md);
}

.panel h3 {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 18px;
}

.panel p {
  margin: 0 0 var(--space-lg);
  color: var(--color-muted-foreground);
  font-size: 14px;
}

.panel .meta-line {
  font-family: var(--font-mono);
  font-size: 13px;
  margin-bottom: var(--space-lg);
  color: var(--color-foreground);
}

.link-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.link-chip {
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 8px 12px;
  border-radius: 6px;
  border: 1px solid var(--color-border);
  color: var(--color-primary);
  transition: background 160ms ease, border-color 160ms ease;
}

.link-chip:hover {
  background: var(--color-code-bg);
  border-color: var(--color-primary);
}

.boundary-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.boundary-list li {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-lg);
  font-size: 14px;
}

.boundary-list strong {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  margin-bottom: 4px;
  color: var(--color-foreground);
}

.boundary-list span {
  color: var(--color-muted-foreground);
}

.sponsor-qr {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
}

.sponsor-qr figure {
  margin: 0;
  text-align: center;
}

.sponsor-qr img {
  width: 100%;
  max-width: 180px;
  margin: 0 auto 8px;
  border-radius: 8px;
  border: 1px solid var(--color-border);
  background: #fff;
  aspect-ratio: 1;
  object-fit: contain;
  padding: 8px;
}

.sponsor-qr figcaption {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-muted-foreground);
}

.sponsor-note {
  margin-top: var(--space-lg) !important;
  font-size: 13px !important;
}

/* ——— Footer ——— */
.footer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-2xl) 0;
  background: var(--color-card);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-lg);
  justify-content: space-between;
  align-items: flex-start;
}

.footer p {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-muted-foreground);
  line-height: 1.7;
}

.footer a {
  color: var(--color-link);
}

.footer a:hover {
  color: var(--color-accent-solid);
}

.link-chip:hover {
  background: var(--color-code-bg);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

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

  body,
  .btn,
  .nav-links a,
  .link-chip,
  .theme-toggle {
    transition: none;
  }

  .vf-live::before,
  .selection {
    animation: none;
  }

  .btn:hover {
    transform: none;
  }
}

/* ——— Responsive ——— */
@media (max-width: 900px) {
  .hero-grid,
  .dl-grid,
  .split-2,
  .value-rail,
  .road-grid,
  .tool-grid {
    grid-template-columns: 1fr;
  }

  .value-item {
    border-right: none;
    border-bottom: 1px solid var(--color-border);
  }

  .value-item:last-child {
    border-bottom: none;
  }

  .rack-row {
    grid-template-columns: 56px 1fr;
  }

  .rack-list {
    grid-column: 1 / -1;
  }

  .boundary-list {
    grid-template-columns: 1fr;
  }

  .dl-platforms {
    grid-template-columns: 1fr;
  }

  .arch-split {
    grid-template-columns: 1fr;
    width: 100%;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: var(--nav-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    background: var(--color-card);
    border-bottom: 1px solid var(--color-border);
    padding: 12px;
    box-shadow: var(--shadow-md);
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links .nav-cta {
    margin-left: 0;
  }

  .nav-links .nav-cta .btn {
    width: 100%;
  }

  .nav-toggle {
    display: inline-grid;
    place-items: center;
  }
}

@media (max-width: 480px) {
  .container {
    width: min(100% - 28px, var(--max));
  }

  .hero {
    padding-top: var(--space-2xl);
  }

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

  .hero-actions .btn {
    width: 100%;
  }

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

  .sponsor-qr {
    grid-template-columns: 1fr;
  }
}