:root {
  --bg: #f4efe4;
  --bg-deep: #eadfc8;
  --ink: #1b1713;
  --ink-soft: rgba(27, 23, 19, 0.72);
  --line: rgba(27, 23, 19, 0.12);
  --accent: #bf2f24;
  --accent-dark: #8b1e17;
  --card: rgba(255, 252, 245, 0.9);
  --card-strong: #fffaf1;
  --shadow: 0 24px 60px rgba(51, 27, 11, 0.12);
  --radius: 28px;
  --radius-sm: 18px;
  --max: 1280px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(191, 47, 36, 0.08), transparent 32%),
    radial-gradient(circle at 92% 12%, rgba(89, 77, 43, 0.1), transparent 18%),
    linear-gradient(180deg, #f7f2e7 0%, var(--bg) 42%, #efe4d0 100%);
  font-family: "IBM Plex Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
}

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

button,
a.btn {
  cursor: pointer;
}

.page-shell {
  position: relative;
  overflow: hidden;
}

.grain {
  pointer-events: none;
  position: fixed;
  inset: 0;
  opacity: 0.12;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 0, 0, 0.025) 1px, transparent 1px);
  background-size: 3px 3px, 4px 4px;
  mix-blend-mode: multiply;
}

.site-header,
.hero,
.section,
.ticker {
  width: min(calc(100% - 32px), var(--max));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 14px;
  z-index: 20;
  margin-top: 14px;
  padding: 14px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  background: rgba(255, 249, 239, 0.84);
  border: 1px solid rgba(27, 23, 19, 0.09);
  border-radius: 999px;
  backdrop-filter: blur(18px);
  box-shadow: 0 14px 40px rgba(33, 23, 10, 0.08);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--accent);
  color: #fffaf5;
  font-family: "Cormorant Garamond", serif;
  font-size: 1.2rem;
  font-weight: 700;
}

.brand-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.brand-text strong {
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.brand-text em {
  font-family: "IBM Plex Mono", monospace;
  font-style: normal;
  font-size: 0.7rem;
  color: var(--ink-soft);
}

.site-nav {
  display: inline-flex;
  gap: 18px;
  color: var(--ink-soft);
  font-size: 0.92rem;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--ink);
}

.header-cta,
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 0 22px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 0.96rem;
  font-weight: 600;
  transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease;
}

.header-cta,
.btn-primary {
  background: var(--ink);
  color: #fff5eb;
  box-shadow: 0 12px 24px rgba(27, 23, 19, 0.14);
}

.btn-secondary {
  border-color: rgba(27, 23, 19, 0.14);
  background: rgba(255, 252, 245, 0.66);
}

.header-cta:hover,
.btn:hover,
.sample-tab:hover,
.faq-question:hover {
  transform: translateY(-2px);
}

.hero {
  padding: 72px 0 30px;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 28px;
  align-items: stretch;
}

.hero-copy,
.hero-stage {
  min-width: 0;
}

.eyebrow,
.panel-head,
.section-kicker,
.closing-kicker {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(27, 23, 19, 0.65);
}

.eyebrow span,
.section-kicker,
.closing-kicker {
  padding: 6px 10px;
  border: 1px solid rgba(27, 23, 19, 0.12);
  border-radius: 999px;
  background: rgba(255, 252, 246, 0.62);
}

.hero h1,
.section h2,
.closing-card h2 {
  margin: 18px 0 0;
  font-family: "Cormorant Garamond", "Songti SC", serif;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 0.96;
}

.hero h1 {
  font-size: clamp(3.4rem, 7vw, 6.6rem);
}

.hero h1 span {
  display: block;
  color: var(--accent-dark);
}

.hero-lead,
.section-heading p,
.workflow-card p,
.evidence-list p,
.feature-rail p,
.faq-answer p {
  color: var(--ink-soft);
  line-height: 1.75;
  font-size: 1.02rem;
}

.hero-lead {
  max-width: 720px;
  margin: 22px 0 0;
}

.hero-actions {
  margin-top: 28px;
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.hero-trust {
  margin-top: 30px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.hero-trust div {
  padding: 16px 16px 18px;
  border-top: 1px solid rgba(27, 23, 19, 0.15);
}

.hero-trust strong {
  display: block;
  font-size: 0.98rem;
}

.hero-trust span {
  display: block;
  margin-top: 6px;
  font-size: 0.88rem;
  color: var(--ink-soft);
  line-height: 1.6;
}

.hero-stage {
  display: grid;
  gap: 18px;
}

.stage-panel,
.workflow-card,
.evidence-board,
.price-card,
.faq-item,
.closing-card,
.feature-rail article {
  background: var(--card);
  border: 1px solid rgba(27, 23, 19, 0.08);
  box-shadow: var(--shadow);
}

.stage-panel {
  border-radius: calc(var(--radius) + 4px);
  padding: 18px;
}

.panel-head {
  align-items: center;
  justify-content: space-between;
}

.stage-metrics {
  margin-top: 16px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.metric-card {
  padding: 14px;
  border-radius: 20px;
  background: linear-gradient(180deg, rgba(255, 250, 244, 0.9), rgba(238, 227, 206, 0.66));
  border: 1px solid rgba(27, 23, 19, 0.08);
}

.metric-card strong {
  display: block;
  margin-top: 10px;
  font-size: clamp(1.8rem, 4vw, 2.7rem);
  line-height: 1;
  font-family: "Cormorant Garamond", serif;
  color: var(--accent-dark);
}

.metric-card em,
.metric-label {
  display: block;
  font-style: normal;
}

.metric-label {
  color: rgba(27, 23, 19, 0.62);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.metric-card em {
  margin-top: 8px;
  color: var(--ink-soft);
  font-size: 0.8rem;
}

.stage-log {
  margin-top: 16px;
  padding: 14px;
  border-radius: 22px;
  background: #1d1815;
  color: #ece0cb;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.84rem;
  display: grid;
  gap: 8px;
}

.stage-log span {
  color: #f58c6f;
}

.sample-switch {
  display: inline-flex;
  gap: 6px;
}

.sample-tab {
  min-height: 36px;
  padding: 0 12px;
  border-radius: 999px;
  border: 1px solid rgba(27, 23, 19, 0.12);
  background: transparent;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.75rem;
}

.sample-tab.is-active {
  background: var(--ink);
  color: #fff5eb;
}

.sample-body {
  margin-top: 16px;
  min-height: 296px;
}

.sample-pane {
  display: none;
  margin: 0;
  padding: 18px;
  min-height: 296px;
  border-radius: 22px;
  background: #201915;
  color: #eedfcd;
  overflow: auto;
  white-space: pre-wrap;
  word-break: break-word;
}

.sample-pane.is-active {
  display: block;
}

.sample-pane code {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.86rem;
  line-height: 1.7;
}

.insight-pane {
  background: linear-gradient(135deg, rgba(191, 47, 36, 0.93), rgba(84, 22, 18, 0.96));
  color: #fff5eb;
}

.insight-pane article {
  max-width: 420px;
}

.insight-pane h3 {
  margin: 16px 0 12px;
  font-family: "Cormorant Garamond", serif;
  font-size: 2rem;
  line-height: 1.02;
}

.insight-pane p {
  line-height: 1.75;
  color: rgba(255, 245, 235, 0.88);
}

.insight-tag {
  display: inline-block;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid rgba(255, 245, 235, 0.26);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.72rem;
}

.ticker {
  margin-top: 18px;
  overflow: hidden;
  border-top: 1px solid rgba(27, 23, 19, 0.08);
  border-bottom: 1px solid rgba(27, 23, 19, 0.08);
}

.ticker-track {
  display: flex;
  gap: 32px;
  padding: 14px 0;
  min-width: max-content;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.8rem;
  color: rgba(27, 23, 19, 0.68);
  animation: ticker 28s linear infinite;
}

.ticker-track span::before {
  content: "•";
  margin-right: 10px;
  color: var(--accent);
}

@keyframes ticker {
  from { transform: translateX(0); }
  to { transform: translateX(-40%); }
}

.section {
  padding: 92px 0 0;
}

.section-heading {
  max-width: 760px;
}

.section h2,
.closing-card h2 {
  font-size: clamp(2.6rem, 5vw, 4.2rem);
}

.workflow-grid {
  margin-top: 26px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.workflow-card {
  border-radius: var(--radius);
  padding: 28px;
}

.step-no,
.feature-index,
.tier {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 48px;
  min-height: 48px;
  border-radius: 50%;
  border: 1px solid rgba(27, 23, 19, 0.12);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.86rem;
}

.workflow-card h3,
.price-card h3,
.feature-rail h3,
.faq-question,
.evidence-list h3 {
  margin: 18px 0 10px;
}

.evidence-layout {
  margin-top: 28px;
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 18px;
}

.evidence-list {
  display: grid;
  gap: 14px;
}

.evidence-list article,
.feature-rail article {
  padding: 24px;
  border-radius: 26px;
}

.evidence-board {
  border-radius: 34px;
  padding: 24px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.board-column {
  padding: 18px;
  border-radius: 22px;
  background: rgba(243, 236, 223, 0.78);
  border: 1px solid rgba(27, 23, 19, 0.08);
}

.board-label {
  display: inline-block;
  margin-bottom: 10px;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.74rem;
  color: rgba(27, 23, 19, 0.64);
}

.board-column ul,
.price-card ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.board-column li,
.price-card li {
  position: relative;
  padding-left: 18px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.board-column li::before,
.price-card li::before {
  content: "•";
  position: absolute;
  left: 0;
  color: var(--accent);
}

.feature-cut {
  padding-top: 42px;
}

.feature-rail {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.feature-index {
  color: var(--accent-dark);
}

.pricing-grid {
  margin-top: 28px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.price-card {
  position: relative;
  border-radius: 30px;
  padding: 28px;
}

.price-card.featured {
  background: linear-gradient(180deg, #1d1815 0%, #2d1d17 100%);
  color: #fff5eb;
  transform: translateY(-14px);
}

.price-card.featured .tier,
.price-card.featured .btn-primary {
  background: #fff1e3;
  color: #221914;
}

.price-card.featured .price,
.price-card.featured h3 {
  color: #fff5eb;
}

.price-card.featured li,
.price-card.featured p,
.price-card.featured span {
  color: rgba(255, 245, 235, 0.82);
}

.tier {
  min-width: auto;
  min-height: auto;
  padding: 7px 10px;
  border-radius: 999px;
  background: rgba(255, 249, 239, 0.8);
}

.price {
  margin: 18px 0 10px;
  font-family: "Cormorant Garamond", serif;
  font-size: clamp(3rem, 5vw, 4.2rem);
  line-height: 1;
}

.price span {
  font-size: 1.2rem;
}

.price-card .btn {
  margin-top: 22px;
  width: 100%;
}

.faq-list {
  margin-top: 28px;
  display: grid;
  gap: 14px;
}

.faq-item {
  border-radius: 24px;
  overflow: hidden;
}

.faq-question {
  width: 100%;
  padding: 22px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  border: 0;
  background: transparent;
  text-align: left;
  font: inherit;
  font-weight: 600;
}

.faq-question span {
  font-family: "IBM Plex Mono", monospace;
  font-size: 1rem;
}

.faq-answer {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 220ms ease;
}

.faq-answer p {
  min-height: 0;
  margin: 0;
  padding: 0 24px 0;
}

.faq-item.is-open .faq-answer {
  grid-template-rows: 1fr;
}

.faq-item.is-open .faq-answer p {
  padding-bottom: 22px;
}

.closing {
  padding-bottom: 80px;
}

.closing-card {
  padding: 38px;
  border-radius: 38px;
  background:
    linear-gradient(135deg, rgba(34, 23, 20, 0.98), rgba(67, 25, 20, 0.94)),
    linear-gradient(180deg, #000, #000);
  color: #fff3e7;
}

.closing-card h2 {
  max-width: 900px;
}

.closing-card .btn-secondary {
  color: #fff3e7;
  border-color: rgba(255, 243, 231, 0.26);
  background: transparent;
}

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 500ms ease, transform 500ms ease;
}

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

@media (max-width: 1080px) {
  .hero,
  .evidence-layout,
  .workflow-grid,
  .feature-rail,
  .pricing-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 56px;
  }

  .price-card.featured {
    transform: none;
  }

  .hero-trust,
  .stage-metrics,
  .evidence-board {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 820px) {
  .site-header {
    border-radius: 28px;
    display: grid;
    grid-template-columns: 1fr;
  }

  .site-nav {
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 10px 16px;
  }

  .header-cta {
    width: 100%;
  }
}

@media (max-width: 640px) {
  .site-header,
  .hero,
  .section,
  .ticker {
    width: min(calc(100% - 20px), var(--max));
  }

  .hero {
    padding-top: 40px;
    gap: 18px;
  }

  .hero h1 {
    font-size: clamp(2.7rem, 14vw, 4.2rem);
  }

  .hero-actions,
  .sample-switch {
    flex-direction: column;
  }

  .btn,
  .header-cta,
  .sample-tab {
    width: 100%;
  }

  .stage-panel,
  .workflow-card,
  .price-card,
  .evidence-list article,
  .feature-rail article,
  .closing-card {
    padding: 20px;
  }

  .section {
    padding-top: 72px;
  }

  .section h2,
  .closing-card h2 {
    font-size: clamp(2.1rem, 10vw, 3rem);
  }
}

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

  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
}