/* ============================================================
   %PRODUCT_NAME% Landing — editorial, ink & paper, deep green
   ============================================================ */

:root {
  color-scheme: light dark;
  --bg: #f5f4f0;
  --ink: #171716;
  --ink-soft: #55534e;
  --ink-faint: #8a877f;
  --line: #cdcac2;
  --line-soft: #dddad2;
  --green: #31523b;
  --green-bright: #3f5f48;
  --green-tint: #e6ebe4;
  --panel: #141613;
  --panel-line: #2e332d;
  --panel-ink: #e8eae3;
  --panel-dim: #8f978d;
  --panel-green: #9ed1a9;
  --radius: 2px;
  font-family: Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  background: var(--bg);
  color: var(--ink);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at 85% 8%, rgba(63, 95, 72, 0.14) 0, transparent 30rem),
    var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: inherit; }

.wrap { max-width: 76rem; margin-inline: auto; padding-inline: clamp(1.25rem, 4vw, 2.5rem); }

::selection { background: var(--green); color: #f5f4f0; }

/* ---------- reveal ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1), transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
  transition-delay: var(--d, 0s);
}
[data-reveal].is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  [data-reveal] { opacity: 1; transform: none; transition: none; }
}

/* ---------- topbar ---------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  gap: 2rem;
  height: 4.25rem;
  padding-inline: clamp(1.25rem, 4vw, 2.5rem);
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--bg) 86%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.brand { display: inline-flex; align-items: center; gap: 0.65rem; text-decoration: none; }
.brand-mark { width: 1.35rem; height: 1.35rem; flex: none; }
.mark-outer { fill: var(--ink); }
.mark-inner { stroke: var(--bg); }
.mark-dot { fill: var(--bg); }
.brand-name { font-size: 0.9rem; font-weight: 700; letter-spacing: 0.02em; }
.topnav { display: flex; gap: 1.6rem; margin-left: auto; }
.topnav a {
  font-size: 0.85rem;
  color: var(--ink-soft);
  text-decoration: none;
  text-underline-offset: 0.3rem;
}
.topnav a:hover { color: var(--ink); text-decoration: underline; }
/* ---------- shared type ---------- */
.eyebrow {
  margin: 0 0 1.4rem;
  color: var(--green-bright);
  font: 700 0.72rem/1.2 ui-monospace, "SF Mono", Menlo, monospace;
  letter-spacing: 0.18em;
}
.eyebrow .idx { color: var(--ink-faint); margin-right: 0.75em; }
.eyebrow.light { color: var(--panel-green); }
.eyebrow.light .idx { color: var(--panel-dim); }

h1, h2, h3 { margin: 0; font-weight: 550; letter-spacing: -0.03em; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 1.2rem;
  min-height: 3.1rem;
  padding: 0 1.35rem;
  border: 1px solid var(--ink);
  font-size: 0.92rem;
  font-weight: 650;
  text-decoration: none;
  transition: background 0.2s, border-color 0.2s, color 0.2s, transform 0.2s;
}
.btn:active { transform: translateY(1px); }
.btn.primary { background: var(--ink); color: var(--bg); }
.btn.primary:hover { background: var(--green); border-color: var(--green); }
.btn.ghost:hover { background: var(--green-tint); border-color: var(--green-bright); }

.actions { display: flex; flex-wrap: wrap; gap: 0.75rem; }

/* ---------- hero ---------- */
.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: clamp(2.5rem, 5vw, 4.5rem);
  align-items: center;
  padding-block: clamp(4rem, 9vw, 7.5rem) clamp(3.5rem, 7vw, 6rem);
}
.hero h1 {
  max-width: 17ch;
  font-size: clamp(2.35rem, 4.5vw, 4rem);
  line-height: 1.06;
  letter-spacing: -0.045em;
}
.lead {
  max-width: 34rem;
  margin: 1.9rem 0 0;
  color: var(--ink-soft);
  font-size: clamp(0.98rem, 1.3vw, 1.13rem);
  line-height: 1.85;
}
.hero .actions { margin-top: 2.4rem; }

/* console card (always dark, both schemes) */
.hero-console { min-width: 0; }
.console-card, .qs-terminal {
  border: 1px solid var(--panel-line);
  border-radius: 10px;
  background: var(--panel);
  color: var(--panel-ink);
  box-shadow: 0 24px 60px -28px rgba(23, 23, 22, 0.45);
  overflow: hidden;
}
.console-head {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  padding: 0.7rem 1rem;
  border-bottom: 1px solid var(--panel-line);
}
.console-dots { display: inline-flex; gap: 0.4rem; }
.console-dots i { width: 0.6rem; height: 0.6rem; border-radius: 50%; background: var(--panel-line); }
.console-dots i:first-child { background: var(--green-bright); }
.console-title {
  font: 500 0.72rem/1 ui-monospace, "SF Mono", Menlo, monospace;
  color: var(--panel-dim);
  letter-spacing: 0.08em;
}
.console-body {
  padding: 1.15rem 1.2rem 1.3rem;
  font: 400 0.8rem/2.05 ui-monospace, "SF Mono", Menlo, monospace;
  white-space: nowrap;
}
.console-body p { margin: 0; display: flex; gap: 0.9em; align-items: baseline; }
.console-body .c-caret-line { align-items: center; }
.c-prompt { color: var(--panel-green); font-weight: 700; }
.c-key { flex: none; width: 5.2em; color: var(--panel-dim); }
.c-val { flex: none; width: 9.5em; }
.c-val.ok { color: var(--panel-green); }
.c-note { color: var(--panel-dim); overflow: hidden; text-overflow: ellipsis; }
.c-dim { color: var(--panel-dim); }
.c-command { display: inline-flex; align-items: center; }
.c-command .c-caret { flex: none; margin-left: 0.45em; }
.c-caret {
  display: inline-block;
  width: 0.55em;
  height: 1.05em;
  margin-left: 0.35em;
  vertical-align: text-bottom;
  background: var(--panel-green);
  animation: blink 1.1s steps(2, start) infinite;
}
@keyframes blink { to { visibility: hidden; } }
@media (prefers-reduced-motion: reduce) { .c-caret { animation: none; } }

/* ---------- trust strip ---------- */
.strip { border-block: 1px solid var(--line); }
.strip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 0;
  padding-block: 0.95rem;
  font: 600 0.72rem/1.4 ui-monospace, "SF Mono", Menlo, monospace;
  letter-spacing: 0.1em;
  color: var(--ink-soft);
}
.strip-row span { display: inline-flex; align-items: center; }
.strip-row span + span::before {
  content: "";
  width: 0.3rem;
  height: 0.3rem;
  margin-inline: 1.4rem;
  background: var(--green-bright);
  opacity: 0.55;
}

/* ---------- sections ---------- */
.section {
  padding-block: clamp(4rem, 8vw, 6.5rem);
  border-bottom: 1px solid var(--line-soft);
  scroll-margin-top: 4.5rem;
}
.section:last-of-type { border-bottom: 0; }
.section-head { max-width: 46rem; margin-bottom: clamp(2.5rem, 5vw, 4rem); }
.section-head h2 { font-size: clamp(1.9rem, 3.6vw, 3rem); line-height: 1.15; letter-spacing: -0.04em; }
.section-lead { margin: 1.3rem 0 0; color: var(--ink-soft); font-size: 1rem; line-height: 1.85; max-width: 40rem; }

/* ---------- engines ---------- */
.engine-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}
.engine-card {
  display: flex;
  flex-direction: column;
  min-height: 16rem;
  padding: 1.8rem 1.9rem 1.5rem;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  text-decoration: none;
  transition: background 0.25s;
}
.engine-card:hover { background: var(--green-tint); }
.engine-top {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  font: 600 0.7rem/1 ui-monospace, "SF Mono", Menlo, monospace;
  letter-spacing: 0.14em;
}
.engine-no { color: var(--ink-faint); }
.engine-en { color: var(--green-bright); }
.engine-card h3 { margin: 1.2rem 0 0.7rem; font-size: 1.35rem; letter-spacing: -0.02em; }
.engine-card p { margin: 0; color: var(--ink-soft); font-size: 0.9rem; line-height: 1.8; }
.engine-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: auto;
  padding-top: 1.6rem;
}
.engine-arrow { font-size: 1.05rem; transition: transform 0.25s; }
.engine-card:hover .engine-arrow { transform: translateX(6px); }
.badge {
  font: 600 0.68rem/1 ui-monospace, "SF Mono", Menlo, monospace;
  letter-spacing: 0.12em;
  padding: 0.42rem 0.6rem;
  border: 1px solid var(--line);
}
.badge.ok { color: var(--green); border-color: var(--green-bright); background: var(--green-tint); }
.badge.wip { color: var(--ink-soft); }
/* ---------- security ---------- */
.security-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(2.5rem, 5vw, 4.5rem);
  align-items: start;
}
.layer-stack { display: flex; flex-direction: column; }
.layer {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  padding: 1.3rem 1.5rem 1.35rem 2.1rem;
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--bg) 60%, #ffffff 40%);
}
.layer + .layer { border-top: 0; }
.layer::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--green-bright);
  opacity: 0.25;
}
.layer:first-child::before { opacity: 1; }
.layer:nth-child(2)::before { opacity: 0.65; }
.layer:nth-child(3)::before { opacity: 0.4; }
.layer-tag {
  font: 700 0.66rem/1 ui-monospace, "SF Mono", Menlo, monospace;
  letter-spacing: 0.16em;
  color: var(--green-bright);
}
.layer-name { font-size: 1.08rem; font-weight: 650; letter-spacing: -0.01em; }
.layer-desc { color: var(--ink-soft); font-size: 0.84rem; }
.security-points { list-style: none; margin: 0; padding: 0; }
.security-points li { padding: 1.5rem 0; border-top: 1px solid var(--line); }
.security-points li:first-child { padding-top: 0.25rem; border-top: 0; }
.security-points h3 { font-size: 1.05rem; margin-bottom: 0.55rem; }
.security-points p { margin: 0; color: var(--ink-soft); font-size: 0.9rem; line-height: 1.8; }

/* ---------- lifecycle ---------- */
.lifecycle-row {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}
.lifecycle-row li {
  padding: 1.7rem 1.6rem 1.8rem;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.lc-no { font-size: 1.3rem; color: var(--green-bright); }
.lifecycle-row h3 { margin: 0.9rem 0 0.5rem; font-size: 1.08rem; }
.lifecycle-row p { margin: 0; color: var(--ink-soft); font-size: 0.86rem; line-height: 1.75; }
.lifecycle-links { display: flex; flex-wrap: wrap; gap: 0.6rem 2.2rem; margin-top: 1.6rem; }
.lifecycle-links a {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--green);
  text-decoration: none;
}
.lifecycle-links a:hover { text-decoration: underline; text-underline-offset: 0.3rem; }

/* ---------- governance ---------- */
.gov-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}
.gov-grid article {
  padding: 1.7rem 1.8rem;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.gov-grid h3 { font-size: 1.08rem; margin-bottom: 0.55rem; }
.gov-grid p { margin: 0; color: var(--ink-soft); font-size: 0.89rem; line-height: 1.8; }

/* ---------- deploy ---------- */
.deploy-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.25rem; }
.deploy-card {
  display: flex;
  flex-direction: column;
  padding: 1.8rem 1.8rem 1.7rem;
  border: 1px solid var(--line);
  transition: border-color 0.25s, background 0.25s;
}
.deploy-card:hover { border-color: var(--green-bright); background: var(--green-tint); }
.deploy-tag {
  font: 700 0.66rem/1 ui-monospace, "SF Mono", Menlo, monospace;
  letter-spacing: 0.16em;
  color: var(--green-bright);
}
.deploy-card h3 { margin: 1.1rem 0 0.6rem; font-size: 1.3rem; letter-spacing: -0.02em; }
.deploy-card p { margin: 0; color: var(--ink-soft); font-size: 0.89rem; line-height: 1.8; }
.deploy-link {
  margin-top: auto;
  padding-top: 1.4rem;
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--green);
  text-decoration: none;
}
.deploy-link:hover { text-decoration: underline; text-underline-offset: 0.3rem; }

/* ---------- quickstart ---------- */
.qs-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(2rem, 5vw, 4rem);
  padding: clamp(2rem, 4.5vw, 3.5rem);
  background: var(--panel);
  color: var(--panel-ink);
  border-radius: 12px;
  align-items: center;
}
.qs-panel h2 { font-size: clamp(1.7rem, 3vw, 2.4rem); line-height: 1.2; letter-spacing: -0.035em; }
.qs-steps { list-style: none; margin: 2rem 0 0; padding: 0; }
.qs-steps li {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  padding: 1rem 0 1rem 1.4rem;
  border-top: 1px solid var(--panel-line);
  position: relative;
}
.qs-steps li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 1.35rem;
  width: 0.45rem;
  height: 0.45rem;
  background: var(--panel-green);
}
.qs-steps strong { font-size: 0.95rem; font-weight: 650; }
.qs-steps span { color: var(--panel-dim); font-size: 0.85rem; line-height: 1.7; }
.qs-terminal { box-shadow: none; }

/* ---------- CTA ---------- */
.cta { padding-block: clamp(4.5rem, 9vw, 7.5rem); }
.cta h2 {
  max-width: 20ch;
  font-size: clamp(2rem, 4.4vw, 3.6rem);
  line-height: 1.12;
  letter-spacing: -0.045em;
  margin-bottom: 2.4rem;
}

/* ---------- footer ---------- */
.footer { border-top: 1px solid var(--line); }
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 2.5rem;
  padding-block: 3rem;
}
.footer-brand p { margin: 0.9rem 0 0; color: var(--ink-faint); font-size: 0.82rem; line-height: 1.8; }
.footer-contact { color: inherit; text-decoration: none; }
.footer-contact:hover { color: var(--ink); text-decoration: underline; text-underline-offset: 0.3rem; }
.footer nav { display: flex; flex-direction: column; gap: 0.65rem; }
.footer-tag {
  font: 700 0.66rem/1 ui-monospace, "SF Mono", Menlo, monospace;
  letter-spacing: 0.16em;
  color: var(--ink-faint);
  margin-bottom: 0.4rem;
}
.footer nav a { font-size: 0.87rem; color: var(--ink-soft); text-decoration: none; }
.footer nav a:hover { color: var(--ink); text-decoration: underline; text-underline-offset: 0.3rem; }
.footer-base {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 1.3rem;
  border-top: 1px solid var(--line-soft);
  font: 600 0.68rem/1.5 ui-monospace, "SF Mono", Menlo, monospace;
  letter-spacing: 0.12em;
  color: var(--ink-faint);
}

/* ---------- responsive ---------- */
@media (max-width: 960px) {
  .hero { grid-template-columns: 1fr; }
  .hero-console { max-width: 34rem; }
  .security-grid { grid-template-columns: 1fr; }
  .qs-panel { grid-template-columns: 1fr; }
  .deploy-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 680px) {
  .topnav { display: none; }
  .engine-grid, .gov-grid { grid-template-columns: 1fr; }
  .lifecycle-row { grid-template-columns: 1fr 1fr; }
  .console-body { font-size: 0.72rem; white-space: normal; }
  .c-note { display: none; }
  .strip-row span + span::before { margin-inline: 0.9rem; }
  .footer-grid { grid-template-columns: 1fr; gap: 1.8rem; }
}

/* ---------- dark ---------- */
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121412;
    --ink: #f1f0eb;
    --ink-soft: #b0b2ad;
    --ink-faint: #7b7f79;
    --line: #343834;
    --line-soft: #262a26;
    --green: #96c8a4;
    --green-bright: #96c8a4;
    --green-tint: #1c241e;
    --panel: #0d0f0d;
    --panel-line: #262b25;
    --panel-ink: #e3e6de;
    --panel-dim: #767e74;
    --panel-green: #9ed1a9;
  }
  body {
    background:
      radial-gradient(circle at 85% 8%, rgba(150, 200, 164, 0.09) 0, transparent 30rem),
      var(--bg);
  }
  .console-card, .qs-terminal { box-shadow: 0 24px 60px -28px rgba(0, 0, 0, 0.7); }
  .layer { background: color-mix(in srgb, var(--bg) 82%, #ffffff 4%); }
  .badge.ok { background: transparent; }
}