/* =========================================================================
   有解 Realize,官网样式
   设计原则:anti-slop,工程感,单一强调色,shape lock,zero gradient.
   ========================================================================= */

/* ---------- 0. design tokens ---------- */
:root {
  /* base */
  --bg: #F8F7F4;
  --bg-elev: #FFFFFF;
  --bg-sunk: #F1EFE9;
  --bg-dark: #0E100C;
  --bg-dark-elev: #151814;

  /* ink */
  --ink: #0F0E0C;
  --ink-2: #3F3D38;
  --ink-3: #6B6862;
  --ink-on-dark: #F0EFEB;
  --ink-on-dark-2: #BAB7AE;
  --ink-on-dark-3: #7A7770;

  /* lines */
  --line: #DCD9D2;
  --line-strong: #C5C1B8;
  --line-on-dark: #2A2C28;
  --line-on-dark-strong: #3A3C36;

  /* single accent (emerald 600). locked across page. */
  --accent: #047857;
  --accent-hover: #035E47;
  --accent-ink: #FFFFFF;
  --accent-soft: #E1F1EA;
  --accent-soft-on-dark: #0F2A22;

  /* shape system (one scale, used everywhere) */
  --r-sm: 4px;
  --r-md: 8px;
  --r-lg: 16px;
  --r-pill: 999px;

  /* spacing */
  --shell-px: 24px;
  --shell-max: 1280px;
  --section-py: clamp(48px, 5vw, 80px);
  --gap-1: 8px;
  --gap-2: 12px;
  --gap-3: 16px;
  --gap-4: 24px;
  --gap-5: 32px;
  --gap-6: 48px;
  --gap-7: 64px;
  --gap-8: 96px;

  /* type scale */
  --ff-sans: "Microsoft YaHei UI", "Microsoft YaHei", "PingFang SC", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --ff-serif: Georgia, "Times New Roman", "Songti SC", serif;
  --ff-mono: "Cascadia Code", "SFMono-Regular", "Consolas", ui-monospace, monospace;

  --fs-display-zh: 6.5rem;
  --fs-display-en: 4.5rem;
  --fs-h2: 3rem;
  --fs-h3: 1.625rem;
  --fs-h4: 1.0625rem;
  --fs-body: 1rem;
  --fs-body-lg: 1.125rem;
  --fs-small: 0.875rem;
  --fs-mini: 0.75rem;

  --lh-tight: 1.05;
  --lh-snug: 1.2;
  --lh-body: 1.6;

  /* motion */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --dur-1: 180ms;
  --dur-2: 320ms;
  --dur-3: 560ms;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0E100C;
    --bg-elev: #151814;
    --bg-sunk: #0A0C09;
    --ink: #F0EFEB;
    --ink-2: #C5C1B8;
    --ink-3: #898578;
    --line: #2A2C28;
    --line-strong: #3A3C36;
    --accent-soft: #0F2A22;
  }
}

.is-disabled { cursor: not-allowed; opacity: 0.58; }
.invite-channel-status { color: var(--ink-on-dark-2); font-size: var(--fs-small); line-height: var(--lh-body); margin: 16px 0 0; }
/* ---------- 1. reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}
body {
  font-family: var(--ff-sans);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  font-feature-settings: "ss01", "cv11";
}
img, svg, video { max-width: 100%; display: block; }
img { height: auto; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; cursor: pointer; }
ul, ol { padding: 0; }
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: var(--r-sm);
}

/* ---------- 2. layout primitives ---------- */
.shell {
  width: 100%;
  max-width: var(--shell-max);
  margin-inline: auto;
  padding-inline: var(--shell-px);
}

.skip-link {
  position: absolute;
  top: -100px;
  left: 16px;
  padding: 12px 16px;
  background: var(--ink);
  color: var(--bg);
  border-radius: var(--r-md);
  z-index: 1000;
  transition: top var(--dur-1) var(--ease-out);
}
.skip-link:focus { top: 16px; }

/* ---------- 3. typography ---------- */
.display {
  display: flex;
  flex-direction: row;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0.25em;
  margin: 0 0 var(--gap-5);
  line-height: 0.95;
}
.display-zh {
  font-size: var(--fs-display-zh);
  font-weight: 800;
  letter-spacing: 0;
  color: var(--ink);
  line-height: 0.95;
}
.display-en {
  font-family: var(--ff-serif);
  font-style: italic;
  font-weight: 600;
  font-size: calc(var(--fs-display-en) * 0.85);
  letter-spacing: 0;
  color: var(--accent);
  line-height: 0.95;
  margin-left: 0.05em;
}
.ink-em { font-style: normal; }
.muted { color: var(--ink-3); font-weight: 500; }

.lede {
  font-size: var(--fs-body-lg);
  line-height: 1.55;
  color: var(--ink-2);
  max-width: 56ch;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--ff-mono);
  font-size: var(--fs-mini);
  font-weight: 500;
  color: var(--accent);
  letter-spacing: 0.04em;
  margin-bottom: 20px;
}
.eyebrow::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
}

.mono {
  font-family: var(--ff-mono);
  font-feature-settings: "ss02", "tnum";
  letter-spacing: 0;
}

/* ---------- 4. buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  font-size: var(--fs-body);
  font-weight: 500;
  line-height: 1;
  border-radius: var(--r-md);
  border: 1px solid transparent;
  transition: background-color var(--dur-1) var(--ease-out),
              color var(--dur-1) var(--ease-out),
              border-color var(--dur-1) var(--ease-out),
              transform var(--dur-1) var(--ease-out);
  white-space: nowrap;
  min-height: 44px;
}
.btn:active { transform: translateY(1px); }
.btn-sm { padding: 8px 14px; font-size: var(--fs-small); }

.btn-primary {
  background: var(--ink);
  color: var(--bg);
}
.btn-primary:hover { background: var(--accent); color: var(--accent-ink); }

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

.btn-on-dark {
  background: var(--ink-on-dark);
  color: var(--ink);
}
.btn-on-dark:hover { background: var(--accent); color: var(--accent-ink); }

.btn-ghost-on-dark {
  background: transparent;
  color: var(--ink-on-dark);
  border-color: var(--line-on-dark-strong);
}
.btn-ghost-on-dark:hover { border-color: var(--ink-on-dark); }

/* ---------- 5. site header / nav ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px) saturate(140%);
  -webkit-backdrop-filter: blur(10px) saturate(140%);
  border-bottom: 1px solid var(--line);
}
@media (prefers-reduced-transparency: reduce) {
  .site-header { background: var(--bg); backdrop-filter: none; -webkit-backdrop-filter: none; }
}
.nav-shell {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 64px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-weight: 600;
  font-size: 1.0625rem;
  letter-spacing: 0;
}
.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--r-sm);
  background: var(--ink);
  color: var(--bg);
  flex-shrink: 0;
}
.brand-name { white-space: nowrap; }
.brand-name-en {
  font-family: var(--ff-mono);
  font-weight: 500;
  font-size: 0.875rem;
  color: var(--ink-3);
  margin-left: 2px;
  letter-spacing: 0;
}
.site-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  font-size: var(--fs-small);
}
.site-nav a {
  color: var(--ink-2);
  transition: color var(--dur-1) var(--ease-out);
}
.site-nav a:hover { color: var(--ink); }

@media (max-width: 960px) {
  .site-nav {
    gap: 18px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    flex: 1;
    justify-content: flex-end;
  }
  .site-nav::-webkit-scrollbar { display: none; }
  .site-nav a { white-space: nowrap; }
  .nav-shell { gap: 12px; }
  .nav-shell .btn-sm { display: none; }
}

@media (max-width: 640px) {
  :root {
    --fs-display-zh: 3.5rem;
    --fs-display-en: 2.5rem;
    --fs-h2: 2.25rem;
    --fs-h3: 1.375rem;
  }
  .site-nav { display: none; }
  .nav-shell .btn-sm { display: inline-flex; }
  .nav-shell { gap: 16px; }
}

/* ---------- 6. hero ---------- */
.hero {
  padding: clamp(32px, 4vw, 56px) 0 var(--section-py);
  position: relative;
  overflow: hidden;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gap-7);
  align-items: start;
}
@media (min-width: 1024px) {
  .hero-grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    gap: var(--gap-7);
    align-items: center;
  }
}
.hero-copy { max-width: 52rem; }
.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--gap-2);
  margin-top: var(--gap-5);
}
.hero-meta {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gap-2);
  margin-top: var(--gap-7);
  padding-top: var(--gap-5);
  border-top: 1px solid var(--line);
  list-style: none;
}
@media (min-width: 640px) {
  .hero-meta { grid-template-columns: repeat(3, 1fr); gap: var(--gap-5); }
}
.hero-meta li {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.meta-key {
  font-family: var(--ff-mono);
  font-size: var(--fs-mini);
  color: var(--ink-3);
}
.meta-val {
  font-size: var(--fs-small);
  color: var(--ink);
  font-weight: 500;
}

/* hero figure */
.hero-figure {
  position: relative;
  margin: 0;
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--bg-elev);
  border: 1px solid var(--line);
  box-shadow:
    0 1px 0 var(--line) inset,
    0 24px 60px -24px rgba(15, 14, 12, 0.18),
    0 4px 12px -8px rgba(15, 14, 12, 0.08);
  display: flex;
  flex-direction: column;
}
@media (prefers-color-scheme: dark) {
  .hero-figure { box-shadow: 0 24px 60px -24px rgba(0, 0, 0, 0.6); border-color: var(--line); }
}
.hero-figure img { display: block; width: 100%; height: auto; }
.hero-figure-frame {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 3;
}
.hero-figure-corner {
  position: absolute;
  width: 18px;
  height: 18px;
  border: 1.5px solid var(--ink);
}
.hero-figure-corner-tl { top: 14px; left: 14px; border-right: none; border-bottom: none; }
.hero-figure-corner-tr { top: 14px; right: 14px; border-left: none; border-bottom: none; }
.hero-figure-corner-bl { bottom: 14px; left: 14px; border-right: none; border-top: none; }
.hero-figure-corner-br { bottom: 14px; right: 14px; border-left: none; border-top: none; }
.hero-figure-caption {
  position: relative;
  z-index: 2;
  font-size: var(--fs-mini);
  color: var(--ink);
  background: var(--bg);
  border-top: 1px solid var(--line);
  padding: 10px 14px;
  font-family: var(--ff-mono);
  letter-spacing: 0;
  display: flex;
  gap: 10px;
  align-items: baseline;
}
.hero-figure-caption .hero-figure-caption-no { color: var(--accent); font-weight: 600; }
.hero-figure-caption .hero-figure-caption-note { color: var(--ink-3); font-family: var(--ff-sans); font-weight: 400; flex: 1; text-align: right; }

/* carousel */
.hero-carousel-track { position: relative; aspect-ratio: 1440 / 900; overflow: hidden; background: var(--bg-elev); flex: 0 0 auto; }
.hero-carousel-slide {
  position: absolute; inset: 0;
  width: 100%; height: 100%; object-fit: cover; object-position: top;
  opacity: 0; transition: opacity 480ms var(--ease-out);
  pointer-events: none;
}
.hero-carousel-slide.is-active { opacity: 1; pointer-events: auto; }

/* segmented tab nav under the image */
.hero-carousel-dots {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  background: var(--bg-elev);
  border-top: 1px solid var(--line);
}
.hero-carousel-dot {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  padding: 12px 8px 11px;
  border: 0;
  border-right: 1px solid var(--line);
  border-bottom: 2px solid transparent;
  background: transparent;
  font-family: var(--ff-sans);
  color: var(--ink-3);
  cursor: pointer;
  text-align: center;
  transition: color var(--dur-1) var(--ease-out),
              background-color var(--dur-1) var(--ease-out),
              border-color var(--dur-1) var(--ease-out);
}
.hero-carousel-dot:last-child { border-right: 0; }
.hero-carousel-dot:hover { color: var(--ink-2); background: var(--bg); }
.hero-carousel-dot-num {
  font-family: var(--ff-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.06em;
  opacity: 0.7;
}
.hero-carousel-dot-label {
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0;
  white-space: nowrap;
}
.hero-carousel-dot.is-active { color: var(--ink); border-bottom-color: var(--accent); background: var(--bg); }
.hero-carousel-dot.is-active .hero-carousel-dot-num { color: var(--accent); opacity: 1; }
.hero-carousel-dot:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: -2px;
}

@media (prefers-reduced-motion: reduce) {
  .hero-carousel-slide { transition: none; }
  .hero-carousel-dot { transition: none; }
}

/* ---------- 7. generic section ---------- */
.section {
  padding-block: var(--section-py);
  border-top: 1px solid var(--line);
}
.section-problem { border-top: 0; padding-block: clamp(40px, 5vw, 72px) var(--section-py); }

.section-head {
  max-width: 64rem;
  margin-bottom: var(--gap-7);
}
.section-head-narrow { max-width: 48rem; }

.section-title {
  font-size: var(--fs-h2);
  line-height: var(--lh-snug);
  letter-spacing: 0;
  font-weight: 600;
  color: var(--ink);
}
.section-title-on-dark { color: var(--ink-on-dark); }

.section-deck {
  margin-top: var(--gap-3);
  font-size: var(--fs-body-lg);
  color: var(--ink-2);
  max-width: 56ch;
  line-height: 1.55;
}

/* ---------- 8. problem section ---------- */
.problem-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gap-6);
}
@media (min-width: 960px) {
  .problem-grid {
    grid-template-columns: 1.1fr 1fr;
    gap: var(--gap-8);
    align-items: start;
  }
}
.problem-body p {
  color: var(--ink-2);
  font-size: var(--fs-body-lg);
  line-height: 1.6;
  max-width: 52ch;
}
.problem-body p + p { margin-top: var(--gap-3); }

/* ---------- 9. capabilities (3×2 grid: 5 cards + 1 CTA) ---------- */
.capability-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gap-3);
}
@media (min-width: 720px) { .capability-grid { grid-template-columns: 1fr 1fr; } }
@media (min-width: 1024px) { .capability-grid { grid-template-columns: 1fr 1fr 1fr; } }
.capability-card {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: var(--gap-5);
  display: flex;
  flex-direction: column;
  gap: var(--gap-3);
  min-height: 220px;
  text-decoration: none;
  color: inherit;
  transition: border-color var(--dur-2) var(--ease-out), background-color var(--dur-2) var(--ease-out);
}
.capability-card:hover { border-color: var(--ink-3); }
.capability-card-num {
  font-family: var(--ff-mono);
  font-size: var(--fs-mini);
  color: var(--accent);
  letter-spacing: 0.02em;
}
.capability-card-title {
  font-size: var(--fs-h4);
  line-height: 1.3;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: 0;
}
.capability-card-body {
  color: var(--ink-2);
  font-size: var(--fs-small);
  line-height: 1.55;
  flex: 1;
}
.capability-card-cta {
  background: var(--bg-dark);
  border-color: var(--line-on-dark);
  color: var(--ink-on-dark);
  position: relative;
}
.capability-card-cta:hover { border-color: var(--accent); }
.capability-card-cta .capability-card-num { color: var(--accent); font-size: 1.5rem; line-height: 1; }
.capability-card-cta .capability-card-title { color: var(--ink-on-dark); }
.capability-card-cta .capability-card-body { color: rgba(255,255,255,0.7); }
.capability-card-link {
  font-family: var(--ff-mono);
  font-size: var(--fs-small);
  color: var(--accent);
  margin-top: auto;
  letter-spacing: 0.02em;
}

/* ---------- 10. two modes comparison ---------- */
.modes-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gap-5);
  border-top: 1px solid var(--line);
  padding-top: var(--gap-5);
}
@media (min-width: 900px) {
  .modes-grid {
    grid-template-columns: 1fr 1px 1fr;
    gap: var(--gap-6);
    padding-top: var(--gap-6);
  }
}
.mode-card {
  display: flex;
  flex-direction: column;
  gap: var(--gap-3);
}
.mode-head { margin-bottom: var(--gap-2); }
.mode-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: var(--fs-mini);
  color: var(--ink-3);
  margin-bottom: var(--gap-2);
  font-weight: 500;
}
.mode-tag .mono { color: var(--ink-3); font-size: 0.6875rem; }
.mode-tag-cli .mono { color: var(--accent); }
.mode-title {
  font-size: var(--fs-h3);
  line-height: 1.25;
  font-weight: 600;
  letter-spacing: 0;
}
.mode-summary {
  color: var(--ink-2);
  font-size: var(--fs-body);
  line-height: 1.6;
  max-width: 48ch;
}
.mode-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: var(--gap-2);
}
.mode-list li {
  position: relative;
  padding-left: 18px;
  color: var(--ink-2);
  font-size: var(--fs-body);
  line-height: 1.55;
}
.mode-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.65em;
  width: 6px;
  height: 1.5px;
  background: var(--ink-3);
}
.mode-card-cli .mode-list li::before { background: var(--accent); }
.mode-fit {
  margin-top: var(--gap-3);
  padding-top: var(--gap-3);
  border-top: 1px solid var(--line);
  font-size: var(--fs-small);
  color: var(--ink-3);
  font-style: normal;
}
.mode-divider { display: none; background: var(--line); }
@media (min-width: 900px) { .mode-divider { display: block; } }

/* ---------- 11. isolation workflow (4 stage cards) ---------- */
.section-isolation { background: var(--bg-sunk); }
.isolation-figure {
  margin: 0;
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  background: var(--bg-elev);
  overflow: hidden;
  box-shadow: 0 12px 40px -16px rgba(15, 14, 12, 0.08);
}
.iso-stages {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
}
@media (min-width: 720px) {
  .iso-stages { grid-template-columns: repeat(4, 1fr); }
  .iso-stage { border-right: 1px solid var(--line); }
  .iso-stage:last-child { border-right: 0; }
}
.iso-stage {
  padding: var(--gap-5);
  display: flex;
  flex-direction: column;
  gap: var(--gap-3);
  position: relative;
  background: var(--bg-elev);
}
.iso-stage[data-state="working"] {
  background: var(--accent-soft);
}
.iso-stage[data-state="applied"] {
  background: var(--accent-soft);
}
.iso-stage-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding-bottom: var(--gap-3);
  border-bottom: 1px solid var(--line);
  margin-bottom: 2px;
}
.iso-stage-num {
  font-size: var(--fs-mini);
  color: var(--accent);
  letter-spacing: 0.02em;
}
.iso-stage-tag {
  font-size: 10px;
  color: var(--ink-3);
  letter-spacing: 0.04em;
}
.iso-stage[data-state="applied"] .iso-stage-tag { color: var(--accent); }
.iso-stage-icon {
  width: 28px;
  height: 28px;
  color: var(--ink-2);
  margin-block: var(--gap-1);
}
.iso-stage[data-state="working"] .iso-stage-icon,
.iso-stage[data-state="applied"] .iso-stage-icon {
  color: var(--accent);
}
.iso-stage-title {
  font-size: var(--fs-h4);
  font-weight: 600;
  color: var(--ink);
  letter-spacing: 0;
  line-height: 1.3;
}
.iso-stage-desc {
  color: var(--ink-2);
  font-size: var(--fs-small);
  line-height: 1.55;
  flex: 1;
}
.isolation-figure figcaption {
  padding: var(--gap-3) var(--gap-5);
  font-family: var(--ff-mono);
  font-size: var(--fs-mini);
  color: var(--ink-3);
  border-top: 1px solid var(--line);
  background: var(--bg-elev);
  display: flex;
  gap: 12px;
  align-items: baseline;
}
.isolation-figure figcaption .fig-no { color: var(--accent); }
.isolation-figure figcaption .fig-note { color: var(--ink-2); font-family: var(--ff-sans); }

/* ---------- 12. privacy (3 栏:保留 / 隔离 / 脱敏) ---------- */
.privacy-tri {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gap-4);
  border-top: 1px solid var(--line);
  padding-top: var(--gap-5);
}
@media (min-width: 800px) {
  .privacy-tri { grid-template-columns: repeat(3, 1fr); gap: var(--gap-5); }
}
.privacy-card {
  display: flex;
  flex-direction: column;
  gap: var(--gap-3);
  padding: var(--gap-5);
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
}
.privacy-card-key {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-size: var(--fs-h4);
  font-weight: 600;
  color: var(--ink);
  letter-spacing: 0;
  padding-bottom: var(--gap-3);
  border-bottom: 1px solid var(--line);
}
.privacy-card-key .mono { color: var(--accent); font-size: 0.875rem; }
.privacy-card p {
  color: var(--ink-2);
  font-size: var(--fs-body);
  line-height: 1.55;
  max-width: 36ch;
}
.privacy-card-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.privacy-card-list li {
  position: relative;
  padding-left: 16px;
  color: var(--ink-2);
  font-size: var(--fs-small);
  line-height: 1.55;
}
.privacy-card-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.65em;
  width: 6px;
  height: 1.5px;
  background: var(--ink-3);
}

.privacy-note {
  margin-top: var(--gap-5);
  padding-top: var(--gap-4);
  border-top: 1px solid var(--line);
  font-size: var(--fs-small);
  color: var(--ink-3);
  line-height: 1.6;
  font-family: var(--ff-mono);
  letter-spacing: 0;
  max-width: 72ch;
}

/* ---------- 13. download CTA (dark) ---------- */
.section-download { border-top: 0; padding-bottom: var(--section-py); }
.download-card {
  background: var(--bg-dark);
  color: var(--ink-on-dark);
  border-radius: var(--r-lg);
  padding: clamp(40px, 5vw, 64px);
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line-on-dark);
}
.download-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 1px;
  background: var(--accent);
}
.download-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gap-7);
}
@media (min-width: 960px) {
  .download-grid {
    grid-template-columns: 1.4fr 1fr;
    gap: var(--gap-8);
    align-items: start;
  }
}
.eyebrow-on-dark { color: var(--accent); }
.lede-on-dark {
  color: var(--ink-on-dark-2);
  font-size: var(--fs-body-lg);
  line-height: 1.55;
  max-width: 56ch;
  margin-top: var(--gap-3);
}
.download-cta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--gap-2);
  margin-top: var(--gap-5);
}

.download-meta {
  background: var(--bg-dark-elev);
  border: 1px solid var(--line-on-dark);
  border-radius: var(--r-md);
  padding: var(--gap-5);
}
.download-meta-title {
  font-size: var(--fs-h4);
  font-weight: 600;
  color: var(--ink-on-dark);
  margin-bottom: var(--gap-3);
  padding-bottom: var(--gap-3);
  border-bottom: 1px solid var(--line-on-dark);
  letter-spacing: 0;
}
.meta-list { list-style: none; display: flex; flex-direction: column; gap: var(--gap-3); }
.meta-row { display: grid; grid-template-columns: 88px 1fr; gap: var(--gap-3); align-items: start; }
.meta-row dt {
  font-family: var(--ff-mono);
  font-size: var(--fs-mini);
  color: var(--accent);
  padding-top: 3px;
}
.meta-row dd {
  color: var(--ink-on-dark-2);
  font-size: var(--fs-small);
  line-height: 1.55;
}
.benefits-list { list-style: none; display: flex; flex-direction: column; gap: var(--gap-4); }
.benefits-list li {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding-bottom: var(--gap-3);
  border-bottom: 1px solid var(--line-on-dark);
}
.benefits-list li:last-child { border-bottom: 0; padding-bottom: 0; }
.benefit-key {
  font-size: var(--fs-h4);
  font-weight: 600;
  color: var(--ink-on-dark);
  letter-spacing: 0;
}
.benefit-val {
  color: var(--ink-on-dark-2);
  font-size: var(--fs-small);
  line-height: 1.55;
}
.invite-form { margin-top: var(--gap-7); padding-top: var(--gap-6); border-top: 1px solid var(--line-on-dark); position: relative; }
.invite-form-head { display: grid; grid-template-columns: 1fr 1fr; gap: var(--gap-6); align-items: end; margin-bottom: var(--gap-5); }
.invite-form-head h3 { font-size: var(--fs-h3); margin: 0; letter-spacing: 0; }
.invite-form-head > p { color: var(--ink-on-dark-2); line-height: 1.65; margin: 0; }
.invite-fields { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--gap-4); }
.invite-fields label > span { display: block; font-size: var(--fs-small); font-weight: 600; margin-bottom: 8px; }
.invite-fields input,.invite-fields select,.invite-fields textarea { width: 100%; border: 1px solid var(--line-on-dark); border-radius: var(--r-sm); background: #fff; color: #17201d; padding: 12px 14px; font: inherit; letter-spacing: 0; }
.invite-fields input,.invite-fields select { min-height: 48px; }
.invite-field-wide { grid-column: 1 / -1; }
.invite-honeypot { position: absolute; left: -10000px; width: 1px; height: 1px; overflow: hidden; }
.invite-consent { display: flex; gap: 10px; align-items: flex-start; color: var(--ink-on-dark-2); font-size: var(--fs-small); line-height: 1.55; margin-top: var(--gap-4); }
.invite-consent input { width: 18px; height: 18px; flex: 0 0 auto; margin-top: 2px; }
.invite-submit-row { display: flex; align-items: center; gap: var(--gap-4); margin-top: var(--gap-4); }
.invite-submit-row p { margin: 0; color: var(--ink-on-dark-2); }
.invite-submit-row .success { color: #76e0bd; }.invite-submit-row .error { color: #ffaaa1; }
@media (max-width: 720px) { .invite-form-head,.invite-fields { grid-template-columns: 1fr; }.invite-field-wide { grid-column: auto; }.invite-submit-row { align-items: stretch; flex-direction: column; } }

/* ---------- 14. docs / verify ---------- */
.docs-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gap-6);
  border-top: 1px solid var(--line);
  padding-top: var(--gap-5);
}
@media (min-width: 960px) {
  .docs-grid {
    grid-template-columns: 1fr 1.2fr;
    gap: var(--gap-8);
  }
}
.docs-col-title {
  font-size: var(--fs-h4);
  font-weight: 600;
  color: var(--ink);
  margin-bottom: var(--gap-3);
  padding-bottom: var(--gap-3);
  border-bottom: 1px solid var(--line);
  letter-spacing: 0;
}
.docs-list { list-style: none; display: flex; flex-direction: column; }
.docs-list li {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: var(--gap-3) 0;
  border-bottom: 1px solid var(--line);
}
.docs-list li:last-child { border-bottom: 0; }
.docs-list a {
  color: var(--ink);
  font-weight: 500;
  font-size: var(--fs-body);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: color var(--dur-1) var(--ease-out);
}
.docs-list a:hover { color: var(--accent); }
.docs-list a .mono { color: var(--ink-3); font-size: var(--fs-small); }
.docs-meta {
  font-size: var(--fs-small);
  color: var(--ink-3);
}

.verify-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--gap-3);
}
.verify-list li {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: var(--gap-3);
  padding: var(--gap-3) 0;
  border-bottom: 1px solid var(--line);
}
.verify-list li:last-child { border-bottom: 0; }
.verify-no {
  font-family: var(--ff-mono);
  font-size: var(--fs-small);
  color: var(--accent);
  padding-top: 3px;
}
.verify-list h4 {
  font-size: var(--fs-h4);
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 4px;
  letter-spacing: 0;
}
.verify-list p {
  color: var(--ink-2);
  font-size: var(--fs-small);
  line-height: 1.55;
  max-width: 52ch;
}

/* ---------- 15. footer ---------- */
.site-footer {
  background: var(--bg-sunk);
  border-top: 1px solid var(--line);
  padding-block: var(--gap-7) var(--gap-5);
  margin-top: var(--gap-7);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gap-5);
  padding-bottom: var(--gap-6);
  border-bottom: 1px solid var(--line);
}
@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--gap-6);
  }
}
.footer-brand .brand { margin-bottom: var(--gap-2); }
.footer-tagline {
  color: var(--ink-2);
  font-size: var(--fs-small);
  line-height: 1.55;
  max-width: 28ch;
}
.footer-col h3 {
  font-size: var(--fs-mini);
  font-family: var(--ff-mono);
  color: var(--ink-3);
  font-weight: 500;
  margin-bottom: var(--gap-3);
}
.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.footer-col a {
  color: var(--ink-2);
  font-size: var(--fs-small);
  transition: color var(--dur-1) var(--ease-out);
}
.footer-col a:hover { color: var(--ink); }
.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  gap: var(--gap-4);
  justify-content: space-between;
  align-items: center;
  padding-top: var(--gap-4);
}
.footer-line {
  font-size: var(--fs-mini);
  color: var(--ink-3);
}

/* ---------- 16. reveal animation ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition:
    opacity var(--dur-3) var(--ease-out),
    transform var(--dur-3) var(--ease-out);
}
[data-reveal].is-revealed {
  opacity: 1;
  transform: translateY(0);
}
@media (prefers-reduced-motion: reduce) {
  [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* ---------- 17. selection ---------- */
::selection {
  background: var(--ink);
  color: var(--bg);
}

/* ---------- 18. utility ---------- */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}