/* =========================================================
   AlphaPulse — Landing styles
   Direction: dark editorial · monospace data accents
   ========================================================= */

:root {
  /* Color tokens */
  --bg: oklch(11% 0.005 240);
  --bg-deeper: oklch(8% 0.005 240);
  --surface: oklch(15% 0.006 240);
  --surface-2: oklch(18% 0.007 240);
  --surface-elev: oklch(21% 0.008 240);
  --border: oklch(26% 0.006 240);
  --border-strong: oklch(34% 0.008 240);

  --text: oklch(96% 0.005 240);
  --text-muted: oklch(70% 0.012 240);
  --text-dim: oklch(54% 0.012 240);

  --accent: oklch(82% 0.16 165);          /* pulse green/cyan */
  --accent-deep: oklch(72% 0.18 165);
  --accent-soft: oklch(82% 0.16 165 / 0.14);
  --warm: oklch(80% 0.16 65);             /* amber for conflict/warning */
  --warm-soft: oklch(80% 0.16 65 / 0.14);
  --red: oklch(70% 0.21 25);

  /* Typography */
  --font-serif: "Fraunces", "Noto Serif SC", ui-serif, Georgia, serif;
  --font-sans: "Inter", "Noto Sans SC", ui-sans-serif, system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;

  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.375rem;
  --text-2xl: clamp(1.6rem, 1.4rem + 1vw, 2.1rem);
  --text-section: clamp(2rem, 1.5rem + 2.5vw, 3.4rem);
  --text-hero: clamp(2.5rem, 1.5rem + 5vw, 5.5rem);

  /* Rhythm */
  --space-section: clamp(4rem, 3rem + 4vw, 8rem);
  --container-max: 1200px;
  --container-pad: clamp(1.25rem, 0.75rem + 2vw, 2.5rem);

  /* Motion */
  --dur-fast: 150ms;
  --dur-base: 280ms;
  --dur-slow: 600ms;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: 1.55;
  overflow-x: hidden;
  background-image:
    radial-gradient(800px 500px at 12% -10%, oklch(20% 0.03 165 / 0.5), transparent 60%),
    radial-gradient(600px 400px at 92% 8%, oklch(20% 0.03 240 / 0.4), transparent 60%);
  background-attachment: fixed;
}

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

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

button {
  font: inherit;
  cursor: pointer;
  background: none;
  border: none;
  color: inherit;
}

ul,
ol {
  list-style: none;
  padding: 0;
  margin: 0;
}

/* ---------- Bilingual toggle ---------- */
body.lang-zh .en,
body.lang-en .zh {
  display: none !important;
}

/* ---------- Skip link ---------- */
.skip-link {
  position: absolute;
  left: -10000px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
}
.skip-link:focus {
  left: 1rem;
  top: 1rem;
  width: auto;
  height: auto;
  padding: 0.5rem 1rem;
  background: var(--accent);
  color: var(--bg);
  z-index: 100;
  border-radius: 6px;
}

/* ---------- Layout ---------- */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding-inline: var(--container-pad);
}

.mono {
  font-family: var(--font-mono);
  font-feature-settings: "ss01", "tnum";
  letter-spacing: 0.02em;
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(18px) saturate(160%);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  background: oklch(11% 0.005 240 / 0.65);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  height: 64px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--accent);
  font-weight: 700;
  letter-spacing: -0.01em;
}

.brand-mark {
  width: 36px;
  height: 24px;
  color: var(--accent);
  filter: drop-shadow(0 0 14px oklch(82% 0.16 165 / 0.4));
}

.brand-text {
  color: var(--text);
  font-size: 1.05rem;
}

.header-nav {
  display: flex;
  gap: 1.6rem;
  font-size: var(--text-sm);
  color: var(--text-muted);
}

.header-nav a {
  position: relative;
  padding: 0.25rem 0;
  transition: color var(--dur-fast) var(--ease-out);
}

.header-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 100%;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur-base) var(--ease-out);
}

.header-nav a:hover {
  color: var(--text);
}

.header-nav a:hover::after {
  transform: scaleX(1);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.lang-toggle {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.05em;
  color: var(--text-muted);
  padding: 0.4rem 0.7rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  transition: all var(--dur-fast) var(--ease-out);
  display: flex;
  gap: 0.3rem;
}

.lang-toggle:hover {
  border-color: var(--border-strong);
  color: var(--text);
}

body.lang-zh .lang-toggle .lang-zh-label,
body.lang-en .lang-toggle .lang-en-label {
  color: var(--accent);
  font-weight: 700;
}

body.lang-zh .lang-toggle .lang-en-label,
body.lang-en .lang-toggle .lang-zh-label {
  color: var(--text-dim);
}

.lang-divider {
  color: var(--text-dim);
}

@media (max-width: 760px) {
  .header-nav {
    display: none;
  }
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.7rem 1.2rem;
  border-radius: 8px;
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: -0.005em;
  transition: all var(--dur-fast) var(--ease-out);
  border: 1px solid transparent;
  white-space: nowrap;
}

.btn-sm {
  padding: 0.45rem 0.9rem;
  font-size: var(--text-xs);
}

.btn-lg {
  padding: 0.95rem 1.4rem;
  font-size: var(--text-base);
}

.btn-block {
  width: 100%;
}

.btn-primary {
  background: var(--accent);
  color: oklch(15% 0.02 165);
  box-shadow: 0 0 0 0 var(--accent);
}

.btn-primary:hover {
  background: oklch(88% 0.16 165);
  transform: translateY(-1px);
  box-shadow: 0 8px 24px -8px oklch(82% 0.16 165 / 0.5);
}

.btn-ghost {
  border-color: var(--border-strong);
  color: var(--text);
  background: transparent;
}

.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-soft);
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding-top: clamp(3rem, 2rem + 4vw, 6rem);
  padding-bottom: clamp(2rem, 1.5rem + 2vw, 4rem);
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: clamp(2rem, 1rem + 4vw, 5rem);
  align-items: center;
}

@media (max-width: 960px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: var(--text-xs);
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.5rem;
  padding: 0.4rem 0.8rem;
  background: var(--accent-soft);
  border: 1px solid oklch(82% 0.16 165 / 0.3);
  border-radius: 999px;
  width: fit-content;
}

.eyebrow .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 0 var(--accent);
  animation: pulse-dot 1.6s var(--ease-out) infinite;
}

@keyframes pulse-dot {
  0% { box-shadow: 0 0 0 0 oklch(82% 0.16 165 / 0.7); }
  70% { box-shadow: 0 0 0 10px oklch(82% 0.16 165 / 0); }
  100% { box-shadow: 0 0 0 0 oklch(82% 0.16 165 / 0); }
}

.hero-title {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: var(--text-hero);
  line-height: 0.98;
  letter-spacing: -0.025em;
  margin: 0 0 1.5rem;
  color: var(--text);
}

.hero-title em {
  font-style: italic;
  color: var(--accent);
  font-weight: 400;
}

body.lang-zh .hero-title {
  font-family: "Noto Serif SC", var(--font-serif);
  font-weight: 800;
}

.hero-sub {
  font-size: var(--text-lg);
  color: var(--text-muted);
  max-width: 56ch;
  margin: 0 0 2rem;
  line-height: 1.6;
}

.hero-sub strong {
  color: var(--text);
  font-weight: 600;
}

.hero-cta {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}

.hero-meta {
  display: flex;
  gap: 2.5rem;
  border-top: 1px solid var(--border);
  padding-top: 1.5rem;
}

.hero-meta li {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.hero-meta-num {
  font-size: 1.6rem;
  color: var(--text);
  font-weight: 700;
}

.hero-meta-label {
  font-size: var(--text-xs);
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* Hero visual */
.hero-visual {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 1rem;
}

.visual-card {
  background: linear-gradient(180deg, var(--surface-2), var(--surface));
  border: 1px solid var(--border-strong);
  border-radius: 16px;
  overflow: hidden;
  box-shadow:
    0 30px 60px -30px oklch(0% 0 0 / 0.6),
    0 0 0 1px oklch(82% 0.16 165 / 0.1) inset;
  transform: perspective(1200px) rotateY(-2deg) rotateX(2deg);
  transition: transform var(--dur-slow) var(--ease-out);
}

.visual-card:hover {
  transform: perspective(1200px) rotateY(0deg) rotateX(0deg);
}

.visual-card-head {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.7rem 1rem;
  border-bottom: 1px solid var(--border);
  background: var(--bg-deeper);
}

.visual-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--text-dim);
}
.visual-dot.red { background: oklch(65% 0.18 25); }
.visual-dot.amber { background: oklch(75% 0.16 65); }
.visual-dot.green { background: oklch(75% 0.16 145); }

.visual-card-title {
  margin-left: auto;
  font-size: var(--text-xs);
  color: var(--text-dim);
}

.visual-body {
  padding: 1.4rem 1.2rem 1.2rem;
}

.visual-prompt {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.8rem 1rem;
  background: var(--bg-deeper);
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: var(--text-sm);
  color: var(--text);
  margin-bottom: 1rem;
}

.visual-mic {
  font-size: 1.05rem;
}

.visual-divider {
  font-size: var(--text-xs);
  color: var(--text-dim);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.4rem 0;
  border-bottom: 1px dashed var(--border);
  margin-bottom: 0.8rem;
}

.visual-sources {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  margin-bottom: 1rem;
}

.visual-sources li {
  display: grid;
  grid-template-columns: 88px 1fr 56px;
  align-items: center;
  gap: 0.6rem;
  font-size: var(--text-xs);
}

.src-name {
  color: var(--text-muted);
}

.src-bar {
  height: 4px;
  background: linear-gradient(90deg, var(--accent), oklch(82% 0.16 165 / 0.3));
  border-radius: 2px;
  width: var(--w, 50%);
  position: relative;
}
.src-bar.amber {
  background: linear-gradient(90deg, var(--warm), oklch(80% 0.16 65 / 0.3));
}

.src-score {
  color: var(--accent);
  text-align: right;
  font-weight: 600;
}
.src-score.amber {
  color: var(--warm);
}
.mono.amber {
  color: var(--warm);
}

.visual-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}

.visual-label {
  font-size: var(--text-xs);
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.visual-score {
  font-size: 2rem;
  color: var(--accent);
  font-weight: 700;
}

.visual-tag {
  align-self: flex-end;
  padding: 0.4rem 0.8rem;
  background: var(--accent-soft);
  color: var(--accent);
  border: 1px solid oklch(82% 0.16 165 / 0.3);
  border-radius: 999px;
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* Ticker */
.ticker {
  margin-top: 4rem;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: var(--bg-deeper);
  overflow: hidden;
  mask-image: linear-gradient(90deg, transparent 0, #000 8%, #000 92%, transparent 100%);
  -webkit-mask-image: linear-gradient(90deg, transparent 0, #000 8%, #000 92%, transparent 100%);
}

.ticker-track {
  display: flex;
  gap: 3rem;
  padding: 0.9rem 0;
  white-space: nowrap;
  animation: ticker-scroll 40s linear infinite;
  font-size: var(--text-xs);
  color: var(--text-muted);
}

.ticker-track span {
  flex-shrink: 0;
}

@keyframes ticker-scroll {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

@media (prefers-reduced-motion: reduce) {
  .ticker-track,
  .eyebrow .dot {
    animation: none;
  }
  .visual-card {
    transform: none;
  }
}

/* ---------- Section primitives ---------- */
.section-eyebrow {
  font-size: var(--text-xs);
  text-transform: uppercase;
  color: var(--text-dim);
  letter-spacing: 0.1em;
  margin-bottom: 1rem;
}

.section-title {
  font-family: var(--font-serif);
  font-size: var(--text-section);
  font-weight: 600;
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin: 0 0 3rem;
  max-width: 22ch;
}

body.lang-zh .section-title {
  font-family: "Noto Serif SC", var(--font-serif);
  font-weight: 800;
}

.section-title em {
  font-style: italic;
  color: var(--accent);
  font-weight: 400;
}

/* ---------- Problem / Solution ---------- */
.problem {
  padding-block: var(--space-section);
  border-top: 1px solid var(--border);
}

.problem-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

@media (max-width: 800px) {
  .problem-grid { grid-template-columns: 1fr; }
}

.problem-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2rem;
  transition: transform var(--dur-base) var(--ease-out), border-color var(--dur-base) var(--ease-out);
}

.problem-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-strong);
}

.problem-conflict { border-top: 3px solid var(--warm); }
.problem-consensus { border-top: 3px solid var(--accent); }

.problem-card header {
  margin-bottom: 1.5rem;
}

.problem-tag {
  display: inline-block;
  font-size: var(--text-xs);
  padding: 0.3rem 0.7rem;
  border-radius: 4px;
  margin-bottom: 1rem;
  letter-spacing: 0.08em;
}

.problem-tag.amber { background: var(--warm-soft); color: var(--warm); }
.problem-tag.green { background: var(--accent-soft); color: var(--accent); }

.problem-card h3 {
  font-family: var(--font-serif);
  font-size: var(--text-xl);
  margin: 0;
  color: var(--text);
  font-weight: 600;
}

body.lang-zh .problem-card h3 {
  font-family: "Noto Serif SC", var(--font-serif);
  font-weight: 700;
}

.problem-sources {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin: 1rem 0 1.5rem;
}

.problem-sources li {
  display: flex;
  justify-content: space-between;
  padding: 0.5rem 0.8rem;
  background: var(--bg-deeper);
  border-radius: 6px;
  font-size: var(--text-sm);
}

.src-pill {
  color: var(--text-muted);
}

.src-stance {
  color: var(--accent);
  font-weight: 600;
}

.score-readout {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding-top: 1.2rem;
  border-top: 1px solid var(--border);
  margin-bottom: 1rem;
}

.score-label {
  font-size: var(--text-xs);
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.score-value {
  font-size: 2.4rem;
  font-weight: 700;
}

.score-value.green { color: var(--accent); }
.score-value.amber { color: var(--warm); }

.problem-note {
  margin: 0;
  font-size: var(--text-sm);
  color: var(--text-muted);
  line-height: 1.5;
}

/* ---------- Features bento ---------- */
.features {
  padding-block: var(--space-section);
  border-top: 1px solid var(--border);
}

.bento {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-auto-rows: minmax(180px, auto);
  gap: 1rem;
}

.bento-cell {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.6rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  position: relative;
  overflow: hidden;
  transition: all var(--dur-base) var(--ease-out);
}

.bento-cell:hover {
  border-color: var(--border-strong);
  background: var(--surface-2);
  transform: translateY(-2px);
}

.bento-cell::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(400px 200px at 100% 0%, var(--accent-soft), transparent 70%);
  opacity: 0;
  transition: opacity var(--dur-base) var(--ease-out);
  pointer-events: none;
}

.bento-cell:hover::before {
  opacity: 1;
}

.bento-wide { grid-column: span 2; }
.bento-tall { grid-row: span 2; }

.bento-cell:nth-child(1) { grid-column: span 2; }      /* 01 wide */
.bento-cell:nth-child(2) { grid-row: span 2; }         /* 02 tall */
.bento-cell:nth-child(3) { grid-column: span 1; }
.bento-cell:nth-child(4) { grid-column: span 1; }
.bento-cell:nth-child(5) { grid-column: span 3; }      /* 05 extra wide */

@media (max-width: 900px) {
  .bento { grid-template-columns: repeat(2, 1fr); }
  .bento-cell:nth-child(1),
  .bento-cell:nth-child(5) { grid-column: span 2; }
  .bento-cell:nth-child(2) { grid-row: auto; }
}
@media (max-width: 560px) {
  .bento { grid-template-columns: 1fr; }
  .bento-cell { grid-column: span 1 !important; grid-row: auto !important; }
}

.bento-num {
  font-size: var(--text-xs);
  color: var(--text-dim);
  letter-spacing: 0.1em;
}

.bento-cell h3 {
  font-family: var(--font-serif);
  font-size: var(--text-xl);
  margin: 0;
  color: var(--text);
  font-weight: 600;
}

body.lang-zh .bento-cell h3 {
  font-family: "Noto Serif SC", var(--font-serif);
  font-weight: 700;
}

.bento-cell p {
  margin: 0;
  font-size: var(--text-sm);
  color: var(--text-muted);
  line-height: 1.6;
}

/* ---------- Use cases ---------- */
.use-cases {
  padding-block: var(--space-section);
  border-top: 1px solid var(--border);
}

.cases {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

@media (max-width: 880px) {
  .cases { grid-template-columns: 1fr; }
}

.case-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.8rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  transition: all var(--dur-base) var(--ease-out);
}

.case-card:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
}

.case-tag {
  font-size: var(--text-xs);
  color: var(--accent);
  letter-spacing: 0.08em;
  margin-bottom: 0.5rem;
  display: block;
}

.case-card h3 {
  font-family: var(--font-serif);
  font-size: var(--text-xl);
  margin: 0;
  font-weight: 600;
}

body.lang-zh .case-card h3 {
  font-family: "Noto Serif SC", var(--font-serif);
  font-weight: 700;
}

.case-pain {
  margin: 0;
  font-size: var(--text-sm);
  color: var(--text-muted);
  line-height: 1.6;
  flex: 1;
}

.case-wins {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.6rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}

.case-wins li {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.case-wins .mono {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--accent);
}

.case-wins span:not(.mono) {
  font-size: var(--text-xs);
  color: var(--text-dim);
}

.benchmark-note {
  margin: 2.5rem 0 0;
  font-size: var(--text-xs);
  color: var(--text-dim);
  line-height: 1.6;
  max-width: 80ch;
}

/* ---------- Demo ---------- */
.demo {
  padding-block: var(--space-section);
  border-top: 1px solid var(--border);
  background: linear-gradient(180deg, transparent, oklch(13% 0.01 165 / 0.5), transparent);
}

.demo-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

@media (max-width: 900px) {
  .demo-inner { grid-template-columns: 1fr; gap: 2.5rem; }
}

.demo-text {
  font-size: var(--text-lg);
  color: var(--text-muted);
  margin: 0 0 2rem;
  line-height: 1.6;
  max-width: 50ch;
}

.demo-frame {
  background: var(--bg-deeper);
  border: 1px solid var(--border-strong);
  border-radius: 16px;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
}

.demo-frame-inner {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.demo-step {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  padding: 0.9rem 1.1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: var(--text-sm);
  color: var(--text);
  transition: all var(--dur-base) var(--ease-out);
}

.demo-step:hover {
  border-color: var(--accent);
  background: var(--surface-2);
}

.demo-step .mono {
  color: var(--accent);
  font-weight: 700;
}

.demo-step-final {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.demo-arrow {
  text-align: center;
  color: var(--text-dim);
  font-size: var(--text-base);
}

/* ---------- Pricing ---------- */
.pricing {
  padding-block: var(--space-section);
  border-top: 1px solid var(--border);
}

.tiers {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  align-items: stretch;
}

@media (max-width: 880px) {
  .tiers { grid-template-columns: 1fr; }
}

.tier {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  position: relative;
  transition: all var(--dur-base) var(--ease-out);
}

.tier:hover {
  border-color: var(--border-strong);
  transform: translateY(-3px);
}

.tier-featured {
  border-color: var(--accent);
  background: linear-gradient(180deg, var(--accent-soft), var(--surface));
  box-shadow: 0 0 0 1px var(--accent), 0 30px 50px -30px oklch(82% 0.16 165 / 0.3);
}

.tier-badge {
  position: absolute;
  top: -10px;
  left: 50%;
  transform: translateX(-50%);
  padding: 0.3rem 0.8rem;
  background: var(--accent);
  color: oklch(15% 0.02 165);
  border-radius: 999px;
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  font-weight: 700;
}

.tier h3 {
  font-family: var(--font-serif);
  font-size: var(--text-xl);
  margin: 0 0 0.6rem;
  font-weight: 600;
}

body.lang-zh .tier h3 {
  font-family: "Noto Serif SC", var(--font-serif);
  font-weight: 700;
}

.tier-price {
  margin: 0;
  display: flex;
  align-items: baseline;
  gap: 0.3rem;
}

.tier-amount {
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--text);
}

.tier-period {
  font-size: var(--text-sm);
  color: var(--text-dim);
}

.tier-list {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  flex: 1;
  font-size: var(--text-sm);
  color: var(--text-muted);
}

.tier-list li {
  position: relative;
  padding-left: 1.4rem;
}

.tier-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--accent);
}

.enterprise-note {
  margin: 2.5rem 0 0;
  text-align: center;
  font-size: var(--text-sm);
  color: var(--text-muted);
}

/* ---------- Waitlist ---------- */
.waitlist {
  padding-block: var(--space-section);
  border-top: 1px solid var(--border);
  background: var(--bg-deeper);
}

.waitlist-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

@media (max-width: 900px) {
  .waitlist-inner { grid-template-columns: 1fr; gap: 2.5rem; }
}

.waitlist-blurb {
  font-size: var(--text-lg);
  color: var(--text-muted);
  line-height: 1.6;
  margin: 0 0 2rem;
}

.waitlist-perks {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  border-left: 2px solid var(--accent);
  padding-left: 1.4rem;
}

.waitlist-perks li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.8rem;
  align-items: baseline;
  font-size: var(--text-sm);
  color: var(--text-muted);
}

.perk-num {
  color: var(--accent);
  font-weight: 700;
}

.waitlist-form {
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: 16px;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

.form-row {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-row label {
  font-size: var(--text-xs);
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.form-row label em {
  color: var(--accent);
  font-style: normal;
}

.form-row input,
.form-row select,
.form-row textarea {
  font: inherit;
  font-size: var(--text-base);
  color: var(--text);
  background: var(--bg-deeper);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.7rem 0.9rem;
  transition: border-color var(--dur-fast) var(--ease-out), box-shadow var(--dur-fast) var(--ease-out);
  width: 100%;
}

.form-row textarea {
  resize: vertical;
  min-height: 80px;
  font-family: inherit;
}

.form-row select {
  appearance: none;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'><path d='M1 1l5 5 5-5' stroke='%2370a89e' stroke-width='1.5' fill='none' stroke-linecap='round'/></svg>");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  padding-right: 2.4rem;
}

.form-row input:focus,
.form-row select:focus,
.form-row textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px oklch(82% 0.16 165 / 0.2);
}

.form-row input:invalid:not(:placeholder-shown) {
  border-color: var(--red);
}

.form-note {
  margin: 0;
  font-size: var(--text-xs);
  color: var(--text-dim);
  line-height: 1.5;
}

.form-status {
  font-size: var(--text-sm);
  padding: 0;
  min-height: 0;
  transition: padding var(--dur-fast) var(--ease-out);
}

.form-status:not(:empty) {
  padding: 0.8rem 1rem;
  border-radius: 8px;
  margin-top: 0.4rem;
}

.form-status.is-success {
  background: var(--accent-soft);
  color: var(--accent);
  border: 1px solid oklch(82% 0.16 165 / 0.3);
}

.form-status.is-error {
  background: oklch(70% 0.21 25 / 0.1);
  color: var(--red);
  border: 1px solid oklch(70% 0.21 25 / 0.3);
}

.form-status.is-loading {
  color: var(--text-muted);
}

.btn[disabled],
.btn[aria-busy="true"] {
  opacity: 0.7;
  cursor: not-allowed;
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--bg-deeper);
  border-top: 1px solid var(--border);
  padding-block: 3rem 1.5rem;
  margin-top: var(--space-section);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 2fr;
  gap: 2rem;
  margin-bottom: 2.5rem;
}

@media (max-width: 800px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 480px) {
  .footer-grid { grid-template-columns: 1fr; }
}

.footer-brand .brand {
  margin-bottom: 0.8rem;
}

.footer-tagline {
  margin: 0;
  font-size: var(--text-sm);
  color: var(--text-muted);
  max-width: 30ch;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  font-size: var(--text-sm);
  container-type: inline-size;
}

.footer-links h4 {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  margin: 0 0 0.4rem;
  font-weight: 600;
}

.footer-links a {
  color: var(--text-muted);
  transition: color var(--dur-fast) var(--ease-out);
}

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

.wechat-card {
  margin-top: 0.6rem;
  padding: 0.9rem;
  border-radius: 14px;
  border: 1px solid var(--border);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.02)),
    var(--surface);
  display: grid;
  grid-template-columns: minmax(0, 1fr) 116px;
  gap: 0.9rem;
  align-items: start;
}

.wechat-card-copy {
  min-width: 0;
}

.wechat-card-label {
  margin: 0 0 0.45rem;
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  color: var(--text-dim);
}

.wechat-card-handle {
  margin: 0;
  font-size: var(--text-lg);
  color: var(--text);
  font-weight: 700;
  letter-spacing: 0.02em;
}

.wechat-card-note {
  margin: 0.5rem 0 0;
  font-size: var(--text-xs);
  color: var(--text-muted);
  line-height: 1.55;
}

.wechat-card-qr {
  display: block;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--border-strong);
  background: #fff;
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.22);
  transition: transform var(--dur-fast) var(--ease-out), border-color var(--dur-fast) var(--ease-out);
}

.wechat-card-qr:hover {
  transform: translateY(-2px);
  border-color: var(--accent);
}

.wechat-card-qr img {
  display: block;
  width: 100%;
  height: auto;
}

@media (max-width: 960px) {
  .wechat-card {
    grid-template-columns: 1fr 96px;
  }
}

@container (max-width: 24rem) {
  .wechat-card {
    grid-template-columns: minmax(0, 1fr) 96px;
  }
}

@container (max-width: 20rem) {
  .wechat-card {
    grid-template-columns: 1fr;
  }

  .wechat-card-qr {
    width: min(180px, 100%);
  }
}

@media (max-width: 480px) {
  .wechat-card {
    grid-template-columns: 1fr;
  }

  .wechat-card-qr {
    width: min(180px, 100%);
  }
}

.footer-disclaimer h4 {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  margin: 0 0 0.6rem;
  font-weight: 600;
}

.footer-disclaimer p {
  margin: 0;
  font-size: var(--text-xs);
  color: var(--text-dim);
  line-height: 1.6;
}

.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 1.5rem;
  font-size: var(--text-xs);
  color: var(--text-dim);
}

.footer-bottom p {
  margin: 0;
}

/* ---------- BETA pill + demo helpers ---------- */

.beta-pill {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  margin-left: 0.5rem;
  background: var(--warm-soft);
  color: var(--warm);
  border: 1px solid oklch(80% 0.16 65 / 0.4);
  border-radius: 999px;
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  vertical-align: middle;
  font-weight: 700;
}

.visual-sources li {
  transition: opacity 0.4s var(--ease-out);
}

.visual-sources[data-demo-sources]:empty::before {
  content: "loading...";
  display: block;
  padding: 0.6rem 0;
  color: var(--text-dim);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
}

/* Source row entrance animation */
@keyframes srcEnter {
  from { opacity: 0; transform: translateX(-8px); }
  to { opacity: 1; transform: translateX(0); }
}
.visual-sources li.is-loaded {
  animation: srcEnter 0.35s var(--ease-out) both;
}

[data-demo-consistency] {
  transition: color var(--dur-base) var(--ease-out);
}

/* Demo footer status bar (e.g. "data: fixture · pipeline: live") */
.demo-status {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  font-size: var(--text-xs);
  color: var(--text-dim);
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px dashed var(--border);
}

.demo-status .pill {
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--bg-deeper);
}

.demo-status .pill.live {
  color: var(--accent);
  border-color: oklch(82% 0.16 165 / 0.4);
}

.demo-status .pill.fixture {
  color: var(--warm);
  border-color: oklch(80% 0.16 65 / 0.4);
}

.demo-status .pill-toggle {
  background: var(--surface);
  cursor: pointer;
  font: inherit;
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
  transition: all var(--dur-fast) var(--ease-out);
}
.demo-status .pill-toggle:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.demo-status .pill-toggle[data-mode="live"] {
  background: var(--accent-soft);
  color: var(--accent);
  border-color: oklch(82% 0.16 165 / 0.5);
}

/* ---------- Voice "try it" button ---------- */

.btn-voice {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.btn-voice .voice-icon {
  display: inline-block;
  transition: transform var(--dur-fast) var(--ease-out);
}

.btn-voice[data-state="listening"] {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-soft);
}

.btn-voice[data-state="listening"] .voice-icon {
  animation: pulse-mic 1.4s ease-in-out infinite;
}

@keyframes pulse-mic {
  0%, 100% { transform: scale(1); }
  50%      { transform: scale(1.18); }
}

.btn-voice[data-state="listening"] .voice-label-idle { display: none; }
.btn-voice[data-state="listening"] .voice-label-listening { display: inline; }

@media (prefers-reduced-motion: reduce) {
  .btn-voice[data-state="listening"] .voice-icon { animation: none; }
}

.voice-result {
  margin-top: 1.4rem;
  padding: 1rem 1.2rem;
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-left: 3px solid var(--accent);
  border-radius: 10px;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  font-size: var(--text-sm);
  animation: voiceEnter 0.35s var(--ease-out);
}

@keyframes voiceEnter {
  from { opacity: 0; transform: translateY(-6px); }
  to   { opacity: 1; transform: translateY(0); }
}

.voice-transcript,
.voice-sentiment {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  flex-wrap: wrap;
}

.voice-result-label {
  font-size: var(--text-xs);
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  min-width: 56px;
}

.voice-sentiment .mono {
  font-weight: 700;
  font-size: 1.05rem;
}

.voice-evidence {
  font-size: var(--text-xs);
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.voice-hint {
  margin: 0;
  font-size: var(--text-xs);
  color: var(--text-dim);
  line-height: 1.5;
}

.voice-hint code {
  background: var(--bg-deeper);
  padding: 0.1rem 0.4rem;
  border-radius: 3px;
  font-size: 0.95em;
}