/* VoiceAec manual — cream / mint / berry, matching the app. */
:root {
  --bg: #fff9f5;
  --paper: #ffffff;
  --ink: #3f3a52;
  --ink-soft: #5c566c;
  --muted: #857b90;
  --line: #efe5ec;
  --line-strong: #e6d9e6;
  --mint: #2ec489;
  --mint-deep: #11805a;
  --mint-soft: #e7faf1;
  --berry: #f27ba9;
  --berry-deep: #b94b77;
  --berry-soft: #fdebf2;
  --blue: #4fa8e8;
  --blue-deep: #216c9f;
  --blue-soft: #eaf4fd;
  --violet: #a78bfa;
  --violet-deep: #6d4fc4;
  --violet-soft: #f2edfe;
  --amber: #e8b84b;
  --amber-deep: #8a6413;
  --amber-soft: #fdf4df;
  --red: #e05e68;
  --red-soft: #fdf0f1;
  --shadow: 0 24px 60px -34px rgba(63, 58, 82, 0.42);
  --shadow-soft: 0 14px 40px -30px rgba(63, 58, 82, 0.34);
  --radius: 20px;
  --radius-sm: 14px;
  --nav-h: 66px;
  --font: "Segoe UI Variable", "Segoe UI", "Microsoft YaHei UI", "Microsoft YaHei",
    "PingFang SC", "Hiragino Sans GB", system-ui, -apple-system, sans-serif;
  --mono: "Cascadia Code", "Consolas", "SFMono-Regular", ui-monospace, monospace;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 22px);
}

/* Page scrollbar: a slim mint pill that floats over the background. */
@supports not selector(::-webkit-scrollbar) {
  html {
    scrollbar-width: thin;
    scrollbar-color: rgba(46, 196, 137, 0.45) transparent;
  }
}

html::-webkit-scrollbar {
  width: 14px;
  height: 14px;
}

html::-webkit-scrollbar-track,
html::-webkit-scrollbar-corner {
  background: transparent;
}

html::-webkit-scrollbar-thumb {
  border: 4px solid transparent;
  border-radius: 999px;
  background: rgba(46, 196, 137, 0.32);
  background-clip: padding-box;
}

html::-webkit-scrollbar-thumb:hover {
  background: rgba(46, 196, 137, 0.5);
  background-clip: padding-box;
}

html::-webkit-scrollbar-thumb:active {
  background: rgba(14, 127, 89, 0.6);
  background-clip: padding-box;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  background:
    radial-gradient(1100px 620px at 8% -8%, rgba(46, 196, 137, 0.16), transparent 62%),
    radial-gradient(900px 540px at 102% 2%, rgba(79, 168, 232, 0.14), transparent 58%),
    radial-gradient(760px 520px at 48% 100%, rgba(242, 123, 169, 0.1), transparent 62%),
    var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(420px 260px at 84% 26%, rgba(167, 139, 250, 0.08), transparent 70%),
    radial-gradient(360px 240px at 16% 62%, rgba(232, 184, 75, 0.07), transparent 70%);
  z-index: -1;
}

::selection {
  background: rgba(46, 196, 137, 0.25);
}

img {
  max-width: 100%;
  height: auto;
}

a {
  color: var(--mint-deep);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

a:hover {
  color: var(--green-deep, #0b6b4b);
}

button,
summary,
a {
  -webkit-tap-highlight-color: transparent;
}

button {
  font: inherit;
}

:focus-visible {
  outline: 3px solid rgba(79, 168, 232, 0.55);
  outline-offset: 3px;
  border-radius: 6px;
}

.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;
}

.skip-link {
  position: fixed;
  left: 16px;
  top: -60px;
  z-index: 1000;
  padding: 10px 16px;
  border-radius: 999px;
  background: var(--ink);
  color: #fff;
  text-decoration: none;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 12px;
  color: #fff;
}

/* reading progress */
.progress {
  position: fixed;
  inset: 0 0 auto 0;
  height: 3px;
  z-index: 90;
  background: transparent;
  pointer-events: none;
}

.progress span {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--mint), var(--blue));
  box-shadow: 0 0 12px rgba(46, 196, 137, 0.45);
  transition: width 0.08s linear;
}

/* nav */
.nav {
  position: sticky;
  top: 0;
  z-index: 80;
  background: rgba(255, 249, 245, 0.86);
  border-bottom: 1px solid rgba(239, 229, 236, 0.8);
  backdrop-filter: blur(18px) saturate(140%);
}

.nav-inner {
  max-width: 1160px;
  margin: 0 auto;
  min-height: var(--nav-h);
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 18px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  text-decoration: none;
  flex: 0 0 auto;
}

.brand img {
  width: 38px;
  height: 38px;
  border-radius: 11px;
  box-shadow: 0 6px 16px -8px rgba(46, 196, 137, 0.65);
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand-text strong {
  font-size: 17px;
  letter-spacing: -0.02em;
}

.brand-text small {
  color: var(--muted);
  font-size: 10.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.version {
  margin-left: 4px;
  padding: 3px 9px;
  border-radius: 999px;
  background: var(--mint-soft);
  color: var(--mint-deep);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2px;
  margin-left: auto;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  padding: 7px 11px;
  border-radius: 999px;
  color: var(--ink-soft);
  font-size: 13.5px;
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
  transition: background 0.16s ease, color 0.16s ease;
}

.nav-link:hover {
  background: var(--mint-soft);
  color: var(--mint-deep);
}

.nav-link.is-active {
  background: var(--mint-soft);
  color: var(--mint-deep);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 0 0 auto;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 10px 18px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 700;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.16s ease, box-shadow 0.16s ease, background 0.16s ease;
}

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

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, #34c98d, #1eae78);
  box-shadow: 0 12px 26px -14px rgba(17, 128, 90, 0.8);
}

.btn-primary:hover {
  color: #fff;
  box-shadow: 0 16px 30px -14px rgba(17, 128, 90, 0.9);
}

.btn-ghost {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.78);
  border-color: var(--line-strong);
}

.btn-ghost:hover {
  color: var(--ink);
  background: #fff;
}

.btn-small {
  min-height: 36px;
  padding: 7px 13px;
  font-size: 12.5px;
}

.btn .icon {
  width: 17px;
  height: 17px;
}

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border: 1px solid var(--line-strong);
  border-radius: 12px;
  background: #fff;
  color: var(--ink);
  cursor: pointer;
}

.nav-toggle .icon {
  width: 20px;
  height: 20px;
}

/* layout */
.wrap {
  width: 100%;
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
}

.hero {
  padding: 64px 0 44px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.02fr 0.98fr;
  gap: 54px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
  padding: 6px 12px 6px 7px;
  border: 1px solid rgba(46, 196, 137, 0.22);
  border-radius: 999px;
  background: rgba(231, 250, 241, 0.72);
  color: var(--mint-deep);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.eyebrow .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--mint);
  box-shadow: 0 0 0 4px rgba(46, 196, 137, 0.14);
}

.hero h1 {
  margin: 0;
  max-width: 640px;
  font-size: clamp(38px, 5.6vw, 64px);
  line-height: 1.08;
  letter-spacing: -0.045em;
  font-weight: 800;
}

.hero h1 .accent {
  display: inline;
  background: linear-gradient(115deg, var(--mint-deep) 4%, var(--mint) 44%, var(--blue) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero .lead {
  max-width: 560px;
  margin: 20px 0 0;
  color: var(--ink-soft);
  font-size: 17px;
  line-height: 1.82;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin-top: 22px;
  color: var(--muted);
  font-size: 12.5px;
}

.hero-meta span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.hero-meta .icon {
  width: 15px;
  height: 15px;
  color: var(--mint-deep);
}

.hero-art {
  position: relative;
  isolation: isolate;
}

.hero-art::before {
  content: "";
  position: absolute;
  inset: 8% 0 -10% 6%;
  z-index: -1;
  border-radius: 42px;
  background: linear-gradient(135deg, rgba(46, 196, 137, 0.22), rgba(79, 168, 232, 0.18) 55%, rgba(242, 123, 169, 0.14));
  filter: blur(26px);
  transform: rotate(-3deg);
}

.hero-shot {
  position: relative;
  border-radius: 22px;
  background: #fff;
  border: 1px solid var(--line);
  padding: 9px;
  box-shadow: 0 40px 80px -40px rgba(63, 58, 82, 0.55);
  transform: rotate(-0.6deg);
}

.hero-shot img {
  display: block;
  border-radius: 15px;
}

.chip {
  position: absolute;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 8px 12px;
  border: 1px solid rgba(255, 255, 255, 0.8);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: 0 14px 30px -18px rgba(63, 58, 82, 0.45);
  backdrop-filter: blur(10px);
  color: var(--ink-soft);
  font-size: 12px;
  font-weight: 700;
  white-space: nowrap;
}

.chip .icon {
  width: 15px;
  height: 15px;
}

.chip-1 {
  top: -14px;
  right: 6%;
  color: var(--mint-deep);
}

.chip-2 {
  bottom: 9%;
  right: -18px;
  color: var(--blue-deep);
}

.chip-3 {
  bottom: -16px;
  left: 4%;
  color: var(--berry-deep);
}

.hero-foot {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  margin-top: 34px;
  padding-top: 18px;
  border-top: 1px dashed var(--line-strong);
  color: var(--muted);
  font-size: 12.5px;
}

.hero-foot strong {
  color: var(--ink-soft);
}

/* quick links */
.quick-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 2px 0 0;
}

.quick-link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 8px 13px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
  color: var(--ink-soft);
  font-size: 12.5px;
  font-weight: 600;
  text-decoration: none;
  transition: border-color 0.16s ease, background 0.16s ease, color 0.16s ease;
}

.quick-link:hover {
  border-color: rgba(46, 196, 137, 0.35);
  background: var(--mint-soft);
  color: var(--mint-deep);
}

.quick-link .icon {
  width: 14px;
  height: 14px;
}

/* sections */
.section {
  padding: 58px 0;
}

.section + .section {
  border-top: 1px solid rgba(239, 229, 236, 0.7);
}

.section-head {
  max-width: 780px;
  margin-bottom: 28px;
}

.section-head h2 {
  margin: 0;
  font-size: clamp(26px, 3.2vw, 36px);
  line-height: 1.22;
  letter-spacing: -0.035em;
  font-weight: 800;
}

.section-head .lead {
  margin: 12px 0 0;
  color: var(--ink-soft);
  font-size: 15.5px;
  line-height: 1.8;
}

.section-head .eyebrow {
  margin-bottom: 12px;
}

/* cards and grids */
.grid {
  display: grid;
  gap: 16px;
}

.grid-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.card {
  position: relative;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
  box-shadow: var(--shadow-soft);
}

.card h3 {
  margin: 0 0 7px;
  font-size: 18px;
  line-height: 1.4;
  letter-spacing: -0.02em;
}

.card p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 14px;
  line-height: 1.75;
}

.card p + p,
.card ul + p {
  margin-top: 10px;
}

.card .small {
  color: var(--muted);
  font-size: 12.5px;
  line-height: 1.7;
}

.icon-box {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  margin-bottom: 14px;
  border-radius: 14px;
  background: var(--tone-soft, var(--mint-soft));
  color: var(--tone, var(--mint-deep));
}

.icon-box .icon {
  width: 22px;
  height: 22px;
}

.tone-mint {
  --tone: var(--mint-deep);
  --tone-soft: var(--mint-soft);
}

.tone-berry {
  --tone: var(--berry-deep);
  --tone-soft: var(--berry-soft);
}

.tone-blue {
  --tone: var(--blue-deep);
  --tone-soft: var(--blue-soft);
}

.tone-violet {
  --tone: var(--violet-deep);
  --tone-soft: var(--violet-soft);
}

.tone-amber {
  --tone: var(--amber-deep);
  --tone-soft: var(--amber-soft);
}

.tone-red {
  --tone: #a83f48;
  --tone-soft: var(--red-soft);
}

/* quick start cards */
.step-card {
  overflow: hidden;
}

.step-card::after {
  content: attr(data-step);
  position: absolute;
  right: 12px;
  bottom: -28px;
  color: rgba(63, 58, 82, 0.055);
  font-size: 112px;
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.08em;
  pointer-events: none;
}

.step-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 12px;
  padding: 4px 9px;
  border-radius: 999px;
  background: var(--tone-soft, var(--mint-soft));
  color: var(--tone, var(--mint-deep));
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.step-card h3 {
  position: relative;
  z-index: 1;
  font-size: 20px;
}

.step-card p {
  position: relative;
  z-index: 1;
}

/* signal flow */
.flow-card {
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.94), rgba(255, 255, 255, 0.78)),
    radial-gradient(600px 200px at 20% 0%, rgba(46, 196, 137, 0.1), transparent 70%);
  box-shadow: var(--shadow-soft);
}

.flow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 6px 0;
}

.flow-col {
  display: grid;
  gap: 8px;
}

.flow-node {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 168px;
  padding: 11px 13px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
  box-shadow: 0 10px 24px -22px rgba(63, 58, 82, 0.5);
}

.flow-node .icon-box {
  width: 34px;
  height: 34px;
  margin: 0;
  border-radius: 10px;
  flex: 0 0 auto;
}

.flow-node .icon-box .icon {
  width: 18px;
  height: 18px;
}

.flow-node strong {
  display: block;
  font-size: 13.5px;
  line-height: 1.25;
}

.flow-node small {
  display: block;
  margin-top: 2px;
  color: var(--muted);
  font-size: 10.5px;
  line-height: 1.35;
}

.flow-node.core {
  min-width: 156px;
  border-color: transparent;
  background: linear-gradient(135deg, #35c98e, #1eae78);
  color: #fff;
  box-shadow: 0 16px 26px -18px rgba(17, 128, 90, 0.75);
}

.flow-node.core small {
  color: rgba(255, 255, 255, 0.78);
}

.flow-node.cable {
  border-color: rgba(79, 168, 232, 0.25);
  background: var(--blue-soft);
}

.flow-node.virtual {
  border-style: dashed;
  border-color: rgba(79, 168, 232, 0.38);
  background: rgba(234, 244, 253, 0.55);
}

.flow-arrow {
  color: #c9bdd0;
  font-size: 22px;
  line-height: 1;
  flex: 0 0 auto;
}

.flow-note {
  display: flex;
  gap: 10px;
  margin-top: 18px;
  padding: 12px 14px;
  border-radius: 12px;
  background: var(--amber-soft);
  color: var(--amber-deep);
  font-size: 13px;
  line-height: 1.65;
}

.flow-note .icon {
  width: 18px;
  height: 18px;
  flex: 0 0 auto;
  margin-top: 2px;
}

/* callouts */
.callout {
  display: flex;
  gap: 12px;
  padding: 15px 17px;
  border: 1px solid var(--line);
  border-left: 4px solid var(--tone, var(--mint));
  border-radius: 14px;
  background: var(--tone-soft, var(--mint-soft));
  color: var(--ink-soft);
  font-size: 13.5px;
  line-height: 1.7;
}

.callout + .callout {
  margin-top: 12px;
}

.callout .icon {
  width: 20px;
  height: 20px;
  flex: 0 0 auto;
  margin-top: 2px;
  color: var(--tone, var(--mint-deep));
}

.callout strong {
  color: var(--ink);
}

.callout.tip {
  --tone: var(--mint);
  --tone-soft: var(--mint-soft);
}

.callout.info {
  --tone: var(--blue);
  --tone-soft: var(--blue-soft);
}

.callout.warn {
  --tone: var(--amber);
  --tone-soft: var(--amber-soft);
}

.callout.danger {
  --tone: var(--red);
  --tone-soft: var(--red-soft);
}

/* split layouts */
.split {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 34px;
  align-items: start;
}

.split-reverse {
  grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
}

.split-reverse .split-media {
  order: 2;
}

.split-reverse .split-copy {
  order: 1;
}

/* figures */
.figure {
  margin: 0;
}

.figure + .figure {
  margin-top: 14px;
}

.mt-8 {
  margin-top: 8px;
}

.mt-12 {
  margin-top: 12px;
}

.mt-16 {
  margin-top: 16px;
}

.mt-20 {
  margin-top: 20px;
}

.mt-24 {
  margin-top: 24px;
}

.shot.annotated {
  position: relative;
}

.hotspot {
  position: absolute;
  z-index: 2;
  display: grid;
  place-items: center;
  width: 27px;
  height: 27px;
  border: 2px solid #fff;
  border-radius: 50%;
  background: var(--mint);
  color: #fff;
  box-shadow: 0 6px 16px -6px rgba(17, 128, 90, 0.8);
  font-size: 12px;
  font-weight: 800;
  line-height: 1;
  transform: translate(-50%, -50%);
  pointer-events: none;
}

.legend {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-top: 16px;
}

.legend-item {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  padding: 11px 12px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.72);
}

.legend-num {
  display: grid;
  place-items: center;
  width: 22px;
  height: 22px;
  margin-top: 1px;
  border-radius: 50%;
  background: var(--mint);
  color: #fff;
  font-size: 10.5px;
  font-weight: 800;
  flex: 0 0 auto;
}

.legend-item strong {
  display: block;
  color: var(--ink);
  font-size: 12.5px;
  line-height: 1.45;
}

.legend-item span {
  display: block;
  margin-top: 2px;
  color: var(--ink-soft);
  font-size: 11.5px;
  line-height: 1.55;
}

.shot {
  display: block;
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #fff;
  box-shadow: var(--shadow);
}

.shot img {
  display: block;
  width: 100%;
  border-radius: 12px;
}

.shot-narrow {
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

.caption {
  margin: 10px 4px 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.6;
  text-align: center;
}

.caption strong {
  color: var(--ink-soft);
}

.zoomable {
  cursor: zoom-in;
}

.fig-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  align-items: start;
}

/* steps */
.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: step;
}

.steps > li {
  position: relative;
  padding: 0 0 20px 44px;
  counter-increment: step;
}

.steps > li:last-child {
  padding-bottom: 0;
}

.steps > li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0;
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--mint-soft);
  color: var(--mint-deep);
  font-size: 12.5px;
  font-weight: 800;
}

.steps > li::after {
  content: "";
  position: absolute;
  left: 13.5px;
  top: 32px;
  bottom: 0;
  width: 1px;
  background: var(--line-strong);
}

.steps > li:last-child::after {
  display: none;
}

.steps > li > strong {
  display: block;
  color: var(--ink);
  font-size: 14.5px;
}

.steps > li p {
  margin: 4px 0 0;
  color: var(--ink-soft);
  font-size: 13.5px;
  line-height: 1.72;
}

.steps > li code {
  font-size: 12px;
}

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

.check-item {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  padding: 10px 12px;
  border-radius: 12px;
  background: rgba(231, 250, 241, 0.55);
  color: var(--ink-soft);
  font-size: 13.5px;
  line-height: 1.65;
}

.check-mark {
  display: grid;
  place-items: center;
  width: 21px;
  height: 21px;
  margin-top: 1px;
  border-radius: 50%;
  background: #fff;
  color: var(--mint-deep);
  flex: 0 0 auto;
  font-size: 12px;
  font-weight: 800;
}

/* pills and tags */
.pill {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 9px;
  border-radius: 999px;
  background: var(--tone-soft, var(--mint-soft));
  color: var(--tone, var(--mint-deep));
  font-size: 11px;
  font-weight: 700;
  line-height: 1.4;
  white-space: nowrap;
}

.pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

/* tables */
.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: #fff;
  box-shadow: var(--shadow-soft);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13.5px;
  line-height: 1.6;
}

th,
td {
  padding: 12px 15px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

th {
  background: rgba(255, 249, 245, 0.7);
  color: var(--ink);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

tr:last-child td {
  border-bottom: 0;
}

td code {
  white-space: nowrap;
}

.cable-table td:first-child {
  color: var(--muted);
  white-space: nowrap;
}

.cable-table td:nth-child(2) {
  font-weight: 700;
}

.cable-table tr.is-key td {
  background: rgba(231, 250, 241, 0.6);
}

.cable-table tr.is-danger td {
  background: rgba(253, 240, 241, 0.7);
}

/* device cards */
.device-card {
  border-top: 4px solid var(--tone, var(--mint));
}

.device-card .device-line {
  display: grid;
  gap: 3px;
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px dashed var(--line);
  font-size: 12.5px;
  line-height: 1.6;
}

.device-card .device-line b {
  color: var(--ink);
  font-size: 11.5px;
  letter-spacing: 0.02em;
}

.device-card .device-line span {
  color: var(--ink-soft);
}

/* mode cards */
.mode-card {
  border-top: 4px solid var(--tone, var(--mint));
}

.mode-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 8px;
}

.mode-name {
  margin: 0;
  font-size: 19px;
  line-height: 1.3;
  letter-spacing: -0.02em;
}

.mode-card .mode-key {
  margin: 0 0 8px;
  color: var(--muted);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.mode-facts {
  display: grid;
  gap: 6px;
  margin: 12px 0 0;
  padding: 12px 0 0;
  border-top: 1px dashed var(--line);
  list-style: none;
  font-size: 12.5px;
  line-height: 1.55;
}

.mode-facts li {
  display: flex;
  justify-content: space-between;
  gap: 12px;
}

.mode-facts span {
  color: var(--muted);
}

.mode-facts b {
  color: var(--ink-soft);
  font-weight: 700;
  text-align: right;
}

/* scene cards */
.scene-card {
  display: flex;
  flex-direction: column;
}

.scene-card .scene-top {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
}

.scene-card .scene-top .icon-box {
  margin: 0;
}

.scene-card h3 {
  margin: 0;
}

.scene-steps {
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 6px;
  color: var(--ink-soft);
  font-size: 12.8px;
  line-height: 1.6;
}

.scene-steps li {
  position: relative;
  padding-left: 16px;
}

.scene-steps li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 8px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--tone, var(--mint));
}

/* stats */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.stat {
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: #fff;
}

.stat-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

.stat-status {
  padding: 2px 7px;
  border-radius: 999px;
  font-size: 10px;
  letter-spacing: 0.02em;
}

.stat-status.ok {
  background: var(--mint-soft);
  color: var(--mint-deep);
}

.stat-status.watch {
  background: var(--amber-soft);
  color: var(--amber-deep);
}

.stat-status.bad {
  background: var(--red-soft);
  color: #a83f48;
}

.stat p {
  margin: 6px 0 0;
  color: var(--ink-soft);
  font-size: 12.5px;
  line-height: 1.6;
}

.stat b {
  color: var(--ink);
}

/* FAQ */
.faq {
  display: grid;
  gap: 10px;
}

.faq details {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
  box-shadow: 0 10px 30px -28px rgba(63, 58, 82, 0.35);
  overflow: hidden;
}

.faq details[open] {
  border-color: rgba(46, 196, 137, 0.28);
  box-shadow: 0 16px 36px -28px rgba(46, 196, 137, 0.32);
}

.faq summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 15px 18px;
  color: var(--ink);
  font-size: 14px;
  font-weight: 700;
  line-height: 1.5;
  cursor: pointer;
  list-style: none;
}

.faq summary::-webkit-details-marker {
  display: none;
}

.faq summary::before {
  content: "Q";
  display: grid;
  place-items: center;
  width: 24px;
  height: 24px;
  border-radius: 8px;
  background: var(--mint-soft);
  color: var(--mint-deep);
  font-size: 11px;
  font-weight: 800;
  flex: 0 0 auto;
}

.faq summary::after {
  content: "+";
  margin-left: auto;
  color: var(--muted);
  font-size: 20px;
  font-weight: 400;
  line-height: 1;
}

.faq details[open] summary::after {
  content: "–";
}

.faq .answer {
  padding: 0 18px 17px 54px;
  color: var(--ink-soft);
  font-size: 13.5px;
  line-height: 1.8;
}

.faq .answer p {
  margin: 0 0 9px;
}

.faq .answer p:last-child,
.faq .answer ul:last-child {
  margin-bottom: 0;
}

.faq .answer ul {
  margin: 0 0 9px;
  padding-left: 18px;
}

.faq .answer li {
  margin: 4px 0;
}

.faq .answer strong {
  color: var(--ink);
}

.faq .answer code,
.faq .answer kbd {
  font-size: 12px;
}

.faq-group-title {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 24px 0 10px;
  color: var(--muted);
  font-size: 11.5px;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.faq-group-title:first-child {
  margin-top: 0;
}

/* advanced */
.adv {
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: #fff;
  overflow: hidden;
}

.adv + .adv {
  margin-top: 10px;
}

.adv summary {
  padding: 15px 18px;
  color: var(--ink);
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  list-style: none;
}

.adv summary::-webkit-details-marker {
  display: none;
}

.adv summary::after {
  content: "+";
  float: right;
  color: var(--muted);
  font-weight: 400;
}

.adv[open] summary::after {
  content: "–";
}

.adv .adv-body {
  padding: 0 18px 18px;
  color: var(--ink-soft);
  font-size: 13.5px;
  line-height: 1.75;
}

.adv .adv-body > :first-child {
  margin-top: 0;
}

.codeblock {
  position: relative;
  margin: 12px 0;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fbf7fa;
  color: #4c4560;
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.7;
  overflow-x: auto;
  white-space: pre;
}

code {
  padding: 1px 5px;
  border-radius: 5px;
  background: rgba(63, 58, 82, 0.06);
  color: #4c4560;
  font-family: var(--mono);
  font-size: 0.9em;
  word-break: break-word;
}

kbd {
  display: inline-block;
  padding: 1px 6px;
  border: 1px solid var(--line-strong);
  border-bottom-width: 2px;
  border-radius: 6px;
  background: #fff;
  color: var(--ink-soft);
  font-family: var(--font);
  font-size: 0.82em;
  font-weight: 700;
  line-height: 1.5;
}

.hash {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 12px 14px;
  border: 1px dashed var(--line-strong);
  border-radius: 12px;
  background: rgba(255, 249, 245, 0.7);
}

.hash code {
  flex: 1;
  padding: 0;
  background: transparent;
  font-size: 11.5px;
  word-break: break-all;
  white-space: normal;
}

.copy-btn {
  flex: 0 0 auto;
  padding: 5px 10px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: #fff;
  color: var(--ink-soft);
  font-size: 11px;
  font-weight: 700;
  cursor: pointer;
}

.copy-btn:hover {
  border-color: rgba(46, 196, 137, 0.4);
  color: var(--mint-deep);
}

/* privacy cards */
.privacy-card h3 {
  display: flex;
  align-items: center;
  gap: 8px;
}

.privacy-card h3 .icon {
  width: 19px;
  height: 19px;
  color: var(--tone, var(--mint-deep));
}

/* footer */
.footer {
  margin-top: 30px;
  padding: 44px 0 54px;
  border-top: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.52);
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 28px;
  align-items: start;
}

.footer-brand {
  display: flex;
  gap: 12px;
  align-items: flex-start;
}

.footer-brand img {
  width: 42px;
  height: 42px;
  border-radius: 12px;
}

.footer-brand strong {
  display: block;
  font-size: 15px;
}

.footer-brand p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 12.5px;
  line-height: 1.7;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  justify-content: flex-end;
}

.footer-links a {
  color: var(--ink-soft);
  font-size: 12.5px;
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--mint-deep);
  text-decoration: underline;
}

.footer-note {
  grid-column: 1 / -1;
  margin-top: 6px;
  padding-top: 16px;
  border-top: 1px dashed var(--line-strong);
  color: var(--muted);
  font-size: 11.5px;
  line-height: 1.7;
}

/* to top */
.to-top {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 70;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.92);
  color: var(--ink-soft);
  box-shadow: 0 12px 30px -16px rgba(63, 58, 82, 0.45);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
}

.to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.to-top:hover {
  color: var(--mint-deep);
  border-color: rgba(46, 196, 137, 0.4);
}

.to-top .icon {
  width: 19px;
  height: 19px;
}

/* lightbox */
.lightbox {
  width: min(1180px, 94vw);
  max-height: 92vh;
  padding: 0;
  border: 0;
  border-radius: 18px;
  background: transparent;
  color: #fff;
  overflow: visible;
}

.lightbox::backdrop {
  background: rgba(31, 26, 42, 0.72);
  backdrop-filter: blur(6px);
}

.lightbox-frame {
  position: relative;
  padding: 10px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.12);
}

.lightbox img {
  display: block;
  width: auto;
  max-width: 100%;
  max-height: 82vh;
  margin: 0 auto;
  border-radius: 10px;
  background: #fff;
}

.lightbox-close {
  position: absolute;
  top: -14px;
  right: -14px;
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: 50%;
  background: rgba(31, 26, 42, 0.86);
  color: #fff;
  cursor: pointer;
}

.lightbox-close .icon {
  width: 18px;
  height: 18px;
}

.lightbox-caption {
  padding: 9px 6px 1px;
  color: rgba(255, 255, 255, 0.82);
  font-size: 12px;
  text-align: center;
}

/* icons */
.icon {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.9;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex: 0 0 auto;
}

.icon.fill {
  fill: currentColor;
  stroke: none;
}

/* responsive */
@media (max-width: 1080px) {
  .nav-link {
    padding: 7px 8px;
    font-size: 12.5px;
  }

  .hero-grid {
    gap: 38px;
  }

  .grid-4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 900px) {
  .nav-links {
    display: none;
    position: absolute;
    left: 16px;
    right: 16px;
    top: calc(var(--nav-h) + 8px);
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding: 12px;
    border: 1px solid var(--line);
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow);
  }

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

  .nav-link {
    padding: 10px 14px;
    font-size: 14px;
  }

  .nav-toggle {
    display: grid;
    place-items: center;
    margin-left: auto;
  }

  .nav-actions .btn {
    display: none;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .hero {
    padding-top: 46px;
  }

  .hero h1 {
    max-width: 720px;
  }

  .hero-art {
    max-width: 760px;
    margin: 0 auto;
  }

  .hero-art::before {
    right: 0;
    left: 0;
  }

  .split,
  .split-reverse {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .split-reverse .split-media,
  .split-reverse .split-copy {
    order: initial;
  }

  .grid-3,
  .stat-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .flow {
    flex-wrap: wrap;
    justify-content: flex-start;
  }

  .flow-node {
    min-width: 0;
    flex: 1 1 180px;
  }

  .flow-arrow {
    display: none;
  }

  .footer-inner {
    grid-template-columns: 1fr;
  }

  .footer-links {
    justify-content: flex-start;
  }
}

@media (max-width: 640px) {
  .wrap {
    padding: 0 18px;
  }

  .nav-inner {
    padding: 0 18px;
    gap: 10px;
  }

  .brand-text small {
    display: none;
  }

  .version {
    display: none;
  }

  .hero {
    padding: 38px 0 34px;
  }

  .hero .lead {
    font-size: 15.5px;
  }

  .hero-actions .btn {
    flex: 1 1 auto;
  }

  .hero-shot {
    transform: none;
  }

  .chip {
    display: none;
  }

  .section {
    padding: 42px 0;
  }

  .grid-2,
  .grid-3,
  .grid-4,
  .stat-grid,
  .fig-row,
  .legend {
    grid-template-columns: 1fr;
  }

  .hotspot {
    width: 23px;
    height: 23px;
    font-size: 10.5px;
  }

  .card {
    padding: 18px;
  }

  .flow-card {
    padding: 18px;
  }

  .flow {
    flex-direction: column;
    align-items: stretch;
  }

  .flow > .flow-node {
    flex: none;
  }

  .flow-arrow {
    display: block;
    align-self: center;
    transform: rotate(90deg);
    margin: -4px 0;
  }

  .flow-col {
    grid-template-columns: 1fr;
  }

  .flow-node {
    width: 100%;
  }

  .faq summary {
    padding: 13px 14px;
    font-size: 13.5px;
  }

  .faq .answer {
    padding: 0 14px 15px;
  }

  .faq summary::before {
    display: none;
  }

  .hash {
    flex-direction: column;
  }

  .to-top {
    right: 14px;
    bottom: 14px;
  }

  .lightbox-close {
    top: -12px;
    right: -8px;
  }
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

@media print {
  .nav,
  .progress,
  .to-top,
  .lightbox,
  .skip-link {
    display: none !important;
  }

  body {
    background: #fff;
  }

  .section {
    padding: 24px 0;
    break-inside: avoid;
  }

  .shot,
  .card,
  .flow-card {
    box-shadow: none;
  }

  a {
    color: inherit;
  }
}