:root {
  --ink: #171715;
  --ink-soft: #292925;
  --paper: #f7f6f2;
  --paper-2: #efeee8;
  --paper-3: #e6e4dd;
  --white: #fbfaf7;
  --muted: #6b6a63;
  --muted-dark: #a8a79f;
  --line: #d8d6ce;
  --line-dark: rgba(255, 255, 255, 0.14);
  --accent: #e22b4e;
  --accent-dark: #bb1738;
  --accent-soft: #f5dce1;
  --blue: #2455e6;
  --green: #3f8d62;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-serif: var(--font-sans);
  --font-mono: var(--font-sans);
  --radius: 6px;
  --shadow: 0 24px 80px rgba(23, 23, 21, 0.1);
  --container: 1240px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 92px;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 400;
  font-variant-numeric: tabular-nums;
  text-rendering: optimizeLegibility;
  line-height: 1.65;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

body.menu-open {
  overflow: hidden;
}

::selection {
  color: var(--white);
  background: var(--accent);
}

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

button,
input,
select,
textarea {
  font: inherit;
}

button {
  color: inherit;
}

img,
svg {
  display: block;
}

p,
h1,
h2,
h3 {
  margin: 0;
}

.container {
  width: min(var(--container), calc(100% - 64px));
  margin-inline: auto;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 9999;
  padding: 10px 16px;
  color: var(--white);
  background: var(--ink);
  transform: translateY(-160%);
  transition: transform 180ms ease;
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: fixed;
  top: 0;
  z-index: 1000;
  width: 100%;
  background: rgba(247, 246, 242, 0.94);
  border-bottom: 1px solid transparent;
  backdrop-filter: blur(14px);
  transition: border-color 200ms ease, background 200ms ease;
}

.site-header.is-scrolled {
  background: rgba(247, 246, 242, 0.97);
  border-bottom-color: var(--line);
}

.header-inner {
  display: flex;
  min-height: 84px;
  align-items: center;
  justify-content: space-between;
  gap: 36px;
}

.brand {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 10px;
}

.brand-mark {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  color: var(--white);
  background: var(--ink);
  border-radius: 3px;
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 700;
  line-height: 1;
}

.brand-copy {
  display: flex;
  flex-direction: column;
  line-height: 1;
}

.brand-copy strong {
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.brand-copy small {
  margin-top: 7px;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
}

.desktop-nav {
  display: flex;
  margin-left: auto;
  align-items: center;
  gap: 34px;
}

.desktop-nav a {
  position: relative;
  color: var(--ink-soft);
  font-size: 13px;
  font-weight: 500;
}

.desktop-nav a::after {
  position: absolute;
  right: 0;
  bottom: -6px;
  left: 0;
  height: 1px;
  background: var(--accent);
  content: "";
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 180ms ease;
}

.desktop-nav a:hover::after,
.desktop-nav a:focus-visible::after {
  transform: scaleX(1);
  transform-origin: left;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.phone-link {
  display: flex;
  align-items: center;
  gap: 7px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
}

.phone-link svg {
  width: 15px;
  height: 15px;
  color: var(--accent);
}

.button {
  display: inline-flex;
  min-height: 50px;
  padding: 0 22px;
  align-items: center;
  justify-content: center;
  gap: 10px;
  border: 1px solid transparent;
  border-radius: 3px;
  font-size: 14px;
  font-weight: 600;
  line-height: 1;
  cursor: pointer;
  transition: background 180ms ease, border-color 180ms ease, color 180ms ease, transform 180ms ease;
}

.button svg {
  width: 17px;
  height: 17px;
  transition: transform 180ms ease;
}

.button:hover svg {
  transform: translate(2px, -2px);
}

.button:active {
  transform: translateY(1px);
}

.button-small {
  min-height: 40px;
  padding: 0 17px;
  font-size: 12px;
}

.button-dark {
  color: var(--white);
  background: var(--ink);
}

.button-dark:hover {
  background: var(--accent);
}

.button-primary {
  color: var(--white);
  background: var(--accent);
}

.button-primary:hover {
  background: var(--accent-dark);
}

.button-full {
  width: 100%;
}

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  padding: 0;
  place-items: center;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 3px;
  cursor: pointer;
}

.menu-toggle svg {
  width: 20px;
  height: 20px;
}

.mobile-nav {
  padding: 12px 24px 26px;
  background: var(--paper);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.mobile-nav a {
  display: block;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
  font-size: 20px;
  font-weight: 600;
}

.mobile-nav .mobile-phone {
  margin-top: 14px;
  color: var(--accent);
  border-bottom: 0;
  font-family: var(--font-mono);
  font-size: 14px;
}

.hero {
  position: relative;
  min-height: 100svh;
  padding: 150px 0 0;
  overflow: hidden;
  background: var(--paper);
}

.hero-grid {
  position: absolute;
  top: 84px;
  right: 0;
  width: 53%;
  height: calc(100% - 84px);
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(23, 23, 21, 0.06) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(23, 23, 21, 0.06) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(to left, #000 30%, transparent 94%);
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  padding-bottom: 80px;
  align-items: center;
  grid-template-columns: minmax(0, 1.04fr) minmax(460px, 0.96fr);
  gap: clamp(50px, 7vw, 104px);
}

.eyebrow,
.section-kicker,
.micro-label {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--muted);
}

.eyebrow-dot {
  width: 7px;
  height: 7px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 0 4px var(--accent-soft);
}

.hero h1 {
  max-width: 720px;
  margin-top: 26px;
  font-size: clamp(58px, 6.3vw, 92px);
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1.08;
}

.hero h1 span {
  position: relative;
  display: inline-block;
  color: var(--accent);
  font-family: var(--font-serif);
  font-style: normal;
  font-weight: 700;
  letter-spacing: -0.03em;
}

.hero h1 span::after {
  position: absolute;
  right: 0;
  bottom: -5px;
  left: 2px;
  height: 2px;
  background: currentColor;
  content: "";
  transform: rotate(-1.4deg);
}

.hero-description {
  max-width: 580px;
  margin-top: 32px;
  color: var(--muted);
  font-size: 17px;
  font-weight: 400;
  line-height: 1.85;
}

.hero-actions {
  display: flex;
  margin-top: 36px;
  align-items: center;
  gap: 28px;
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  border-bottom: 1px solid var(--ink);
}

.text-link svg {
  width: 16px;
  height: 16px;
}

.hero-proof {
  display: flex;
  margin-top: 58px;
  gap: 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.hero-proof div {
  display: flex;
  min-width: 0;
  padding: 20px 24px 20px 0;
  flex: 1;
  flex-direction: column;
  gap: 3px;
}

.hero-proof div + div {
  padding-left: 24px;
  border-left: 1px solid var(--line);
}

.hero-proof strong {
  font-family: var(--font-mono);
  font-size: 19px;
  font-weight: 700;
  line-height: 1.2;
}

.hero-proof span {
  color: var(--muted);
  font-size: 12px;
  line-height: 1.5;
}

.answer-console {
  position: relative;
  width: 100%;
  max-width: 540px;
  justify-self: end;
  background: var(--white);
  border: 1px solid var(--ink);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.answer-console::before {
  position: absolute;
  top: -15px;
  right: 24px;
  padding: 4px 8px;
  color: var(--white);
  background: var(--ink);
  content: "品牌可见性演示";
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
}

.console-topbar {
  display: flex;
  padding: 18px 20px;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
}

.console-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.live-dot {
  width: 6px;
  height: 6px;
  background: var(--green);
  border-radius: 50%;
}

.console-status {
  padding: 3px 7px;
  color: var(--green);
  background: rgba(63, 141, 98, 0.1);
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
}

.console-query {
  display: flex;
  margin: 18px 20px 14px;
  min-height: 50px;
  padding: 0 14px;
  align-items: center;
  gap: 10px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 3px;
  font-size: 13px;
}

.console-query svg {
  width: 16px;
  height: 16px;
  color: var(--muted);
}

.console-query span {
  min-width: 0;
  flex: 1;
}

.engine-tabs {
  display: flex;
  padding: 0 20px;
  gap: 22px;
  border-bottom: 1px solid var(--line);
}

.engine-tab {
  position: relative;
  padding: 0 0 12px;
  color: var(--muted);
  background: transparent;
  border: 0;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
}

.engine-tab::after {
  position: absolute;
  right: 0;
  bottom: -1px;
  left: 0;
  height: 2px;
  background: var(--accent);
  content: "";
  transform: scaleX(0);
  transition: transform 180ms ease;
}

.engine-tab.is-active {
  color: var(--ink);
}

.engine-tab.is-active::after {
  transform: scaleX(1);
}

.console-answer {
  min-height: 235px;
  padding: 22px 20px 20px;
}

.answer-meta {
  display: flex;
  margin-bottom: 16px;
  align-items: center;
  justify-content: space-between;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 11px;
}

.console-answer p {
  font-size: 15px;
  font-weight: 400;
  line-height: 1.9;
}

.console-answer mark,
.answer-card mark {
  padding: 1px 4px;
  color: var(--accent-dark);
  background: var(--accent-soft);
  font-weight: 700;
}

.citation-row {
  display: flex;
  margin-top: 22px;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.citation-row span {
  padding: 4px 7px;
  color: var(--muted);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 2px;
  font-size: 11px;
}

.citation-row .citation-label {
  padding-left: 0;
  color: var(--muted);
  background: transparent;
  border: 0;
}

.console-metrics {
  display: grid;
  padding: 17px 20px;
  align-items: center;
  background: var(--ink);
  border-radius: 0 0 5px 5px;
  color: var(--white);
  grid-template-columns: auto 1fr auto;
  gap: 18px;
}

.visibility-score > span {
  display: block;
  color: var(--muted-dark);
  font-size: 11px;
}

.visibility-score strong {
  display: block;
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 600;
  line-height: 1.2;
}

.visibility-score small {
  color: var(--muted-dark);
  font-size: 11px;
}

.score-chart {
  display: flex;
  height: 38px;
  align-items: flex-end;
  gap: 5px;
}

.score-chart span {
  width: 100%;
  height: var(--h);
  background: rgba(255, 255, 255, 0.2);
}

.score-chart span.is-current {
  background: var(--accent);
}

.metric-trend {
  display: flex;
  align-items: center;
  gap: 4px;
  color: #9dd6b4;
  font-family: var(--font-mono);
  font-size: 11px;
}

.metric-trend svg {
  width: 14px;
  height: 14px;
}

.platform-strip {
  position: relative;
  z-index: 1;
  width: 100%;
  padding: 17px 0;
  overflow: hidden;
  color: var(--white);
  background: var(--ink);
}

.platform-track {
  display: flex;
  width: max-content;
  align-items: center;
  animation: marquee 34s linear infinite;
}

.platform-track span {
  padding: 0 38px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  white-space: nowrap;
}

.platform-track i {
  width: 4px;
  height: 4px;
  background: var(--accent);
  border-radius: 50%;
}

@keyframes marquee {
  to {
    transform: translateX(-50%);
  }
}

.metrics-section {
  padding: 76px 0;
  background: var(--white);
  border-bottom: 1px solid var(--line);
}

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

.metric-item {
  position: relative;
  padding: 0 34px;
  border-right: 1px solid var(--line);
}

.metric-item:first-child {
  padding-left: 0;
}

.metric-item:last-child {
  padding-right: 0;
  border-right: 0;
}

.metric-index {
  display: block;
  margin-bottom: 22px;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 11px;
}

.metric-item strong {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(38px, 4vw, 58px);
  font-weight: 600;
  letter-spacing: -0.06em;
  line-height: 1;
}

.metric-item sup {
  color: var(--accent);
  font-size: 0.45em;
  vertical-align: top;
}

.metric-item p {
  margin-top: 10px;
  color: var(--muted);
  font-size: 14px;
}

.section {
  padding: 140px 0;
}

.services-section {
  background: var(--paper);
}

.section-heading {
  display: grid;
  margin-bottom: 74px;
  align-items: end;
  grid-template-columns: 1fr 0.6fr;
  gap: 80px;
}

.section-kicker {
  display: flex;
  margin-bottom: 28px;
  align-items: center;
  gap: 12px;
  color: var(--muted);
}

.section-kicker span {
  color: var(--accent);
}

.section-heading h2,
.method-intro h2,
.case-heading h2,
.about-copy h2,
.faq-intro h2,
.contact-copy h2 {
  font-size: clamp(44px, 5vw, 72px);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.08;
}

.section-heading h2 em,
.method-intro h2 em,
.case-heading h2 em,
.about-copy h2 em,
.faq-intro h2 em,
.contact-copy h2 em {
  font-family: var(--font-serif);
  font-style: normal;
  font-weight: 700;
  color: var(--accent);
}

.section-intro {
  max-width: 500px;
  color: var(--muted);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.9;
}

.section-heading .section-intro {
  padding-bottom: 8px;
}

.services-grid {
  display: grid;
  border-top: 1px solid var(--ink);
  border-left: 1px solid var(--line);
  grid-template-columns: repeat(3, 1fr);
}

.service-item {
  position: relative;
  min-height: 340px;
  padding: 30px;
  overflow: hidden;
  background: var(--paper);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  transition: background 220ms ease, color 220ms ease;
}

.service-item:hover {
  color: var(--white);
  background: var(--ink);
}

.service-topline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 11px;
}

.service-topline svg {
  width: 27px;
  height: 27px;
  color: var(--accent);
  stroke-width: 1.4;
}

.service-item h3 {
  margin-top: 76px;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.service-item p {
  margin-top: 13px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.8;
  transition: color 220ms ease;
}

.service-item:hover p {
  color: var(--muted-dark);
}

.service-tag {
  position: absolute;
  right: 30px;
  bottom: 30px;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.signal-panel {
  display: grid;
  margin-top: 64px;
  padding: 54px;
  align-items: center;
  background: var(--white);
  border: 1px solid var(--line);
  grid-template-columns: 0.8fr 1.2fr;
  gap: 70px;
}

.micro-label {
  color: var(--accent);
}

.signal-copy h3 {
  margin-top: 18px;
  font-size: 34px;
  letter-spacing: -0.03em;
  line-height: 1.2;
}

.signal-copy p {
  max-width: 420px;
  margin-top: 18px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 400;
  line-height: 1.85;
}

.signal-flow {
  display: flex;
  align-items: center;
}

.flow-node {
  display: flex;
  width: 100px;
  height: 120px;
  padding: 12px;
  flex: 0 0 auto;
  flex-direction: column;
  justify-content: space-between;
  background: var(--paper);
  border: 1px solid var(--line);
}

.flow-node > span {
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 11px;
}

.flow-node svg {
  width: 24px;
  height: 24px;
  color: var(--ink);
  stroke-width: 1.4;
}

.flow-node strong {
  font-size: 14px;
  font-weight: 700;
}

.flow-node.is-accent {
  color: var(--white);
  background: var(--accent);
  border-color: var(--accent);
}

.flow-node.is-accent > span {
  color: rgba(255, 255, 255, 0.66);
}

.flow-node.is-accent svg {
  color: var(--white);
}

.flow-line {
  width: 100%;
  height: 1px;
  background: var(--line);
}

.method-section {
  background: var(--white);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.method-layout {
  display: grid;
  align-items: start;
  grid-template-columns: 0.74fr 1.26fr;
  gap: clamp(70px, 9vw, 150px);
}

.method-intro {
  position: sticky;
  top: 130px;
}

.method-intro .section-intro {
  margin-top: 28px;
}

.method-intro .text-link {
  margin-top: 28px;
}

.method-stamp {
  display: flex;
  width: 142px;
  height: 142px;
  margin-top: 78px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  border: 1px solid var(--line);
  border-radius: 50%;
  transform: rotate(-8deg);
}

.method-stamp span {
  font-family: var(--font-mono);
  font-size: 34px;
  letter-spacing: -0.06em;
  line-height: 1;
}

.method-stamp small {
  width: 86px;
  margin-top: 8px;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  line-height: 1.5;
  text-align: center;
}

.process-list {
  border-top: 1px solid var(--ink);
}

.process-item {
  border-bottom: 1px solid var(--line);
}

.process-trigger {
  display: grid;
  width: 100%;
  padding: 28px 0;
  align-items: center;
  background: transparent;
  border: 0;
  cursor: pointer;
  grid-template-columns: 50px 1fr 28px;
  text-align: left;
}

.process-number {
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 11px;
}

.process-title {
  font-size: 25px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.process-plus {
  position: relative;
  width: 24px;
  height: 24px;
}

.process-plus::before,
.process-plus::after {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 13px;
  height: 1px;
  background: var(--ink);
  content: "";
  transform: translate(-50%, -50%);
  transition: transform 180ms ease;
}

.process-plus::after {
  transform: translate(-50%, -50%) rotate(90deg);
}

.process-item.is-open .process-plus::after {
  transform: translate(-50%, -50%) rotate(0);
}

.process-body {
  max-width: 680px;
  padding: 0 50px 32px 50px;
}

.process-body p {
  color: var(--muted);
  font-size: 14px;
  font-weight: 400;
  line-height: 1.9;
}

.process-tags {
  display: flex;
  margin-top: 20px;
  gap: 8px;
  flex-wrap: wrap;
}

.process-tags span {
  padding: 5px 9px;
  color: var(--muted);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 11px;
}

.case-section {
  padding: 140px 0;
  color: var(--white);
  background: var(--ink);
}

.case-heading {
  display: grid;
  margin-bottom: 60px;
  align-items: end;
  grid-template-columns: 1fr 0.55fr;
  gap: 80px;
}

.section-kicker-light {
  color: var(--muted-dark);
}

.section-kicker-light span {
  color: #ff5d78;
}

.section-intro-light {
  color: var(--muted-dark);
}

.case-query {
  display: flex;
  padding: 18px 22px;
  align-items: center;
  gap: 12px;
  background: var(--ink-soft);
  border: 1px solid var(--line-dark);
  font-size: 15px;
}

.case-query svg {
  width: 17px;
  height: 17px;
  color: #ff5d78;
}

.answer-comparison {
  display: grid;
  margin-top: 20px;
  align-items: stretch;
  grid-template-columns: 1fr 58px 1fr;
}

.answer-card {
  min-height: 430px;
  padding: 30px;
  border: 1px solid var(--line-dark);
}

.answer-card-before {
  color: var(--muted-dark);
  background: #1e1e1b;
}

.answer-card-after {
  color: var(--white);
  background: var(--ink-soft);
  border-color: rgba(255, 93, 120, 0.55);
}

.answer-card-top {
  display: flex;
  padding-bottom: 20px;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line-dark);
  font-family: var(--font-mono);
  font-size: 11px;
}

.answer-state {
  padding: 4px 8px;
  color: var(--ink);
  background: var(--paper-3);
  border-radius: 2px;
  font-family: var(--font-sans);
  font-size: 11px;
  font-weight: 700;
}

.answer-card-after .answer-state {
  color: var(--white);
  background: var(--accent);
}

.answer-body {
  min-height: 275px;
  padding-top: 52px;
}

.answer-engine {
  display: block;
  margin-bottom: 22px;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
}

.answer-body p {
  max-width: 470px;
  font-size: 19px;
  font-weight: 500;
  line-height: 1.8;
}

.answer-card-before .answer-body p {
  color: #bcbbb4;
}

.before-signal {
  display: flex;
  margin-top: 36px;
  gap: 6px;
}

.before-signal span {
  width: 30px;
  height: 4px;
  background: rgba(255, 255, 255, 0.08);
}

.after-signal {
  display: flex;
  margin-top: 30px;
  align-items: center;
  gap: 10px;
  color: #9dd6b4;
  flex-wrap: wrap;
  font-size: 11px;
}

.after-signal svg {
  width: 17px;
  height: 17px;
}

.after-signal span {
  padding-right: 10px;
  border-right: 1px solid var(--line-dark);
}

.after-signal span:last-child {
  border-right: 0;
}

.answer-card-bottom {
  display: flex;
  padding-top: 20px;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--line-dark);
  font-size: 12px;
}

.answer-card-bottom strong {
  font-family: var(--font-mono);
  font-size: 16px;
}

.comparison-mark {
  display: grid;
  place-items: center;
}

.comparison-mark svg {
  width: 24px;
  height: 24px;
  color: #ff5d78;
}

.case-results {
  display: grid;
  margin-top: 50px;
  padding-top: 34px;
  align-items: center;
  border-top: 1px solid var(--line-dark);
  grid-template-columns: 0.8fr 0.8fr 0.8fr 1.4fr;
  gap: 28px;
}

.case-results div {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.case-results strong {
  font-family: var(--font-mono);
  font-size: 31px;
  font-weight: 600;
  letter-spacing: -0.05em;
}

.case-results span,
.case-results p {
  color: var(--muted-dark);
  font-size: 12px;
  font-weight: 400;
}

.about-section {
  background: var(--paper-2);
}

.about-grid {
  display: grid;
  align-items: center;
  grid-template-columns: 0.9fr 1.1fr;
  gap: clamp(70px, 10vw, 160px);
}

.about-copy .section-intro {
  margin-top: 28px;
}

.about-points {
  display: flex;
  margin-top: 34px;
  flex-direction: column;
  gap: 12px;
}

.about-points span {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  font-weight: 700;
}

.about-points svg {
  width: 16px;
  height: 16px;
  color: var(--accent);
}

.about-statement {
  position: relative;
  padding: 74px 58px 42px;
  background: var(--white);
  border: 1px solid var(--line);
}

.about-statement::before {
  position: absolute;
  top: 24px;
  left: 28px;
  color: var(--accent);
  content: "“";
  font-family: var(--font-serif);
  font-size: 78px;
  line-height: 1;
}

.about-statement > p {
  font-family: var(--font-serif);
  font-style: normal;
  font-weight: 500;
  font-size: clamp(26px, 3vw, 40px);
  line-height: 1.55;
}

.about-statement > p span {
  color: var(--accent);
}

.statement-footer {
  display: flex;
  margin-top: 58px;
  padding-top: 18px;
  justify-content: space-between;
  color: var(--muted);
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
}

.faq-section {
  padding: 140px 0;
  background: var(--white);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.faq-layout {
  display: grid;
  align-items: start;
  grid-template-columns: 0.72fr 1.28fr;
  gap: clamp(70px, 9vw, 140px);
}

.faq-intro {
  position: sticky;
  top: 130px;
}

.faq-intro .section-intro {
  margin-top: 28px;
}

.faq-list {
  border-top: 1px solid var(--ink);
}

.faq-list details {
  border-bottom: 1px solid var(--line);
}

.faq-list summary {
  display: grid;
  padding: 25px 0;
  align-items: center;
  cursor: pointer;
  list-style: none;
  grid-template-columns: 48px 1fr 26px;
}

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

.faq-index {
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 11px;
}

.faq-question {
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.faq-toggle {
  position: relative;
  width: 22px;
  height: 22px;
}

.faq-toggle::before,
.faq-toggle::after {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 12px;
  height: 1px;
  background: var(--ink);
  content: "";
  transform: translate(-50%, -50%);
  transition: transform 180ms ease;
}

.faq-toggle::after {
  transform: translate(-50%, -50%) rotate(90deg);
}

.faq-list details[open] .faq-toggle::after {
  transform: translate(-50%, -50%) rotate(0);
}

.faq-answer {
  padding: 0 54px 28px 48px;
}

.faq-answer p {
  max-width: 720px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.9;
}

.contact-section {
  padding: 140px 0;
  background: var(--paper);
  border-top: 1px solid var(--line);
}

.contact-grid {
  display: grid;
  align-items: start;
  grid-template-columns: 0.92fr 0.72fr;
  gap: clamp(70px, 10vw, 160px);
}

.contact-copy .section-intro {
  margin-top: 28px;
}

.contact-phone {
  display: grid;
  margin-top: 46px;
  padding: 22px 0;
  align-items: center;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  grid-template-columns: 1fr auto auto;
  gap: 18px;
}

.contact-phone span {
  color: var(--muted);
  font-size: 12px;
}

.contact-phone strong {
  font-family: var(--font-mono);
  font-size: clamp(22px, 2.8vw, 34px);
  font-weight: 600;
  letter-spacing: -0.05em;
}

.contact-phone svg {
  width: 21px;
  height: 21px;
  color: var(--accent);
}

.audit-notes {
  display: grid;
  margin-top: 34px;
  color: var(--muted);
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  font-family: var(--font-mono);
  font-size: 11px;
}

.contact-form {
  position: relative;
  padding: 32px;
  background: var(--white);
  border: 1px solid var(--ink);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.form-header {
  display: flex;
  padding-bottom: 22px;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
  font-size: 15px;
  font-weight: 700;
}

.form-badge {
  padding: 3px 7px;
  color: var(--accent-dark);
  background: var(--accent-soft);
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 11px;
}

.contact-form label {
  display: block;
  margin-top: 20px;
}

.contact-form label > span {
  display: block;
  margin-bottom: 7px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-honeypot {
  position: absolute;
  left: -10000px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.contact-form input,
.contact-form select,
.contact-form textarea {
  width: 100%;
  min-height: 48px;
  padding: 12px 13px;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 2px;
  outline: none;
  transition: border-color 160ms ease, background 160ms ease;
}

.contact-form textarea {
  min-height: 98px;
  resize: vertical;
}

.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
  background: var(--white);
  border-color: var(--ink);
}

.contact-form input::placeholder,
.contact-form textarea::placeholder {
  color: #aaa9a1;
}

.contact-form .button {
  margin-top: 24px;
}

.contact-form .button:disabled {
  cursor: wait;
  opacity: 0.72;
}

.form-note {
  margin-top: 12px;
  color: var(--muted);
  font-size: 11px;
  text-align: center;
}

.form-error {
  margin-top: 12px;
  color: var(--accent-dark);
  font-size: 12px;
}

.form-success {
  position: absolute;
  inset: 0;
  z-index: 2;
  display: flex;
  padding: 42px;
  align-items: center;
  justify-content: center;
  gap: 16px;
  color: var(--white);
  background: var(--ink);
  border-radius: 5px;
}

.form-success[hidden] {
  display: none;
}

.form-success svg {
  width: 38px;
  height: 38px;
  color: #9dd6b4;
}

.form-success strong {
  display: block;
  font-size: 20px;
  font-weight: 700;
}

.form-success span {
  display: block;
  max-width: 290px;
  margin-top: 4px;
  color: var(--muted-dark);
  font-size: 13px;
}

.site-footer {
  padding: 72px 0 28px;
  color: var(--white);
  background: var(--ink);
}

.footer-top {
  display: grid;
  padding-bottom: 68px;
  grid-template-columns: 1.4fr 0.6fr 0.8fr auto;
  gap: 60px;
}

.brand-light .brand-mark {
  color: var(--ink);
  background: var(--white);
}

.brand-light .brand-copy small {
  color: var(--muted-dark);
}

.footer-brand p {
  margin-top: 22px;
  color: var(--muted-dark);
  font-size: 13px;
  line-height: 1.8;
}

.footer-nav,
.footer-contact {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 12px;
}

.footer-nav > span,
.footer-contact > span {
  margin-bottom: 8px;
  color: var(--muted-dark);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.footer-nav a,
.footer-contact a {
  color: #deddd7;
  font-size: 13px;
  font-weight: 400;
}

.footer-nav a:hover,
.footer-contact a:hover {
  color: #ff5d78;
}

.back-to-top {
  display: grid;
  width: 44px;
  height: 44px;
  place-items: center;
  border: 1px solid var(--line-dark);
  border-radius: 50%;
  transition: color 180ms ease, background 180ms ease;
}

.back-to-top:hover {
  color: var(--ink);
  background: var(--white);
}

.back-to-top svg {
  width: 17px;
  height: 17px;
}

.footer-bottom {
  display: flex;
  padding-top: 24px;
  align-items: center;
  justify-content: space-between;
  color: var(--muted-dark);
  border-top: 1px solid var(--line-dark);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
}

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 650ms ease, transform 650ms cubic-bezier(0.2, 0.7, 0.2, 1);
}

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

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

@media (max-width: 1100px) {
  .desktop-nav {
    display: none;
  }

  .header-actions {
    margin-left: auto;
  }

  .menu-toggle {
    display: grid;
  }

  .hero-inner {
    grid-template-columns: minmax(0, 1fr) minmax(420px, 0.82fr);
    gap: 52px;
  }

  .hero h1 {
    font-size: clamp(54px, 7vw, 76px);
  }

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

  .signal-panel {
    grid-template-columns: 1fr;
    gap: 44px;
  }

  .footer-top {
    grid-template-columns: 1.3fr 0.7fr 1fr auto;
    gap: 32px;
  }
}

@media (max-width: 900px) {
  .phone-link {
    display: none;
  }

  .hero {
    padding-top: 132px;
  }

  .hero-inner {
    padding-bottom: 70px;
    grid-template-columns: 1fr;
  }

  .hero-copy {
    max-width: 760px;
  }

  .hero h1 {
    font-size: clamp(56px, 10vw, 82px);
  }

  .answer-console {
    max-width: 680px;
    justify-self: start;
  }

  .metrics-grid {
    grid-template-columns: repeat(2, 1fr);
    row-gap: 44px;
  }

  .metric-item:nth-child(2) {
    border-right: 0;
  }

  .metric-item:nth-child(3) {
    padding-left: 0;
  }

  .section-heading,
  .case-heading {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .section-heading {
    margin-bottom: 56px;
  }

  .section-heading .section-intro {
    max-width: 650px;
  }

  .method-layout,
  .about-grid,
  .faq-layout,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 60px;
  }

  .method-intro,
  .faq-intro {
    position: static;
  }

  .method-stamp {
    display: none;
  }

  .case-heading {
    margin-bottom: 46px;
  }

  .case-heading .section-intro {
    max-width: 620px;
  }

  .answer-comparison {
    grid-template-columns: 1fr;
  }

  .comparison-mark {
    height: 58px;
  }

  .comparison-mark svg {
    transform: rotate(90deg);
  }

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

  .case-results p {
    grid-column: 1 / -1;
  }

  .contact-form {
    max-width: 680px;
  }
}

@media (max-width: 680px) {
  .container {
    width: min(var(--container), calc(100% - 36px));
  }

  .header-inner {
    min-height: 72px;
  }

  .brand-mark {
    width: 31px;
    height: 31px;
    font-size: 18px;
  }

  .brand-copy strong {
    font-size: 15px;
  }

  .header-actions .button {
    display: none;
  }

  .hero {
    min-height: auto;
    padding-top: 112px;
  }

  .hero-grid {
    top: 72px;
    width: 100%;
    height: 70%;
    opacity: 0.7;
  }

  .hero h1 {
    margin-top: 22px;
    font-size: clamp(47px, 15vw, 66px);
    line-height: 1.02;
  }

  .hero-description {
    margin-top: 25px;
    font-size: 15px;
    line-height: 1.8;
  }

  .hero-actions {
    align-items: flex-start;
    flex-direction: column;
    gap: 20px;
  }

  .hero-actions .button {
    width: 100%;
  }

  .hero-proof {
    display: grid;
    margin-top: 42px;
    grid-template-columns: 1fr 1fr;
  }

  .hero-proof div {
    padding: 16px 12px 16px 0;
  }

  .hero-proof div + div {
    padding-left: 14px;
  }

  .hero-proof div:nth-child(3) {
    padding-left: 0;
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .answer-console::before {
    display: none;
  }

  .console-query {
    margin: 14px 14px 12px;
  }

  .engine-tabs {
    padding-inline: 14px;
  }

  .console-answer {
    min-height: 256px;
    padding: 20px 14px;
  }

  .console-metrics {
    padding-inline: 14px;
    grid-template-columns: auto 1fr;
  }

  .metric-trend {
    display: none;
  }

  .metrics-section {
    padding: 52px 0;
  }

  .metric-item {
    padding: 0 18px;
  }

  .metric-index {
    margin-bottom: 14px;
  }

  .section,
  .case-section,
  .faq-section,
  .contact-section {
    padding: 88px 0;
  }

  .section-heading h2,
  .method-intro h2,
  .case-heading h2,
  .about-copy h2,
  .faq-intro h2,
  .contact-copy h2 {
    font-size: clamp(39px, 11vw, 54px);
  }

  .section-kicker {
    margin-bottom: 20px;
  }

  .services-grid {
    grid-template-columns: 1fr;
  }

  .service-item {
    min-height: 300px;
    padding: 24px;
  }

  .service-item h3 {
    margin-top: 55px;
  }

  .signal-panel {
    padding: 30px 24px;
  }

  .signal-copy h3 {
    font-size: 28px;
  }

  .signal-flow {
    align-items: stretch;
    flex-wrap: wrap;
  }

  .flow-node {
    width: calc(50% - 10px);
    height: 105px;
  }

  .flow-line {
    display: none;
  }

  .signal-flow {
    gap: 10px;
  }

  .process-trigger {
    grid-template-columns: 38px 1fr 24px;
  }

  .process-title {
    font-size: 21px;
  }

  .process-body {
    padding: 0 0 28px 38px;
  }

  .case-query {
    align-items: flex-start;
    font-size: 13px;
  }

  .answer-card {
    min-height: 0;
    padding: 24px;
  }

  .answer-body {
    min-height: 0;
    padding-top: 38px;
  }

  .answer-body p {
    font-size: 16px;
  }

  .case-results {
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }

  .case-results div:nth-child(3) {
    grid-column: 1 / -1;
  }

  .about-statement {
    padding: 60px 28px 32px;
  }

  .about-statement::before {
    left: 18px;
  }

  .faq-list summary {
    padding: 20px 0;
    grid-template-columns: 36px 1fr 24px;
  }

  .faq-question {
    padding-right: 12px;
    font-size: 17px;
    line-height: 1.5;
  }

  .faq-answer {
    padding: 0 30px 24px 36px;
  }

  .contact-phone {
    grid-template-columns: 1fr auto;
  }

  .contact-phone span {
    grid-column: 1 / -1;
  }

  .audit-notes {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .contact-form {
    padding: 24px 18px;
  }

  .form-row {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .form-success {
    padding: 28px;
    align-items: flex-start;
    flex-direction: column;
  }

  .footer-top {
    padding-bottom: 46px;
    grid-template-columns: 1fr 1fr;
  }

  .footer-brand {
    grid-column: 1 / -1;
  }

  .back-to-top {
    align-self: end;
    justify-self: end;
  }

  .footer-bottom {
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
  }
}

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

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

  .reveal {
    opacity: 1;
    transform: none;
  }
}