:root {
  --brand: #4263f2;
  --brand-dark: #2f4bd4;
  --brand-soft: #eef1ff;
  --violet: #6b4ae8;
  --ink: #1f2025;
  --muted: #666e7b;
  --line: #e3e5ea;
  --surface: #ffffff;
  --page: #fbfbfc;
  --dark: #11152b;
  --dark-soft: #1a2040;
  --success: #237a52;
  --shadow: 0 24px 70px rgba(31, 32, 37, 0.12);
  --shadow-soft: 0 12px 36px rgba(31, 32, 37, 0.08);
  --radius: 22px;
  --container: 1160px;
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--page);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body.dialog-open {
  overflow: hidden;
}

button,
input,
textarea {
  font: inherit;
}

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

button {
  color: inherit;
}

img {
  display: block;
  max-width: 100%;
}

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

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

section[id] {
  scroll-margin-top: 92px;
}

.skip-link {
  position: fixed;
  z-index: 999;
  top: 12px;
  left: 12px;
  padding: 10px 14px;
  border-radius: 10px;
  color: #fff;
  background: var(--ink);
  transform: translateY(-150%);
}

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

.site-header {
  position: fixed;
  z-index: 100;
  top: 0;
  right: 0;
  left: 0;
  border-bottom: 1px solid rgba(227, 229, 234, 0.8);
  background: rgba(251, 251, 252, 0.92);
  backdrop-filter: blur(18px);
}

.nav-shell {
  width: min(var(--container), calc(100% - 48px));
  height: 66px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
  font-size: 20px;
  font-weight: 760;
  letter-spacing: -0.03em;
}

.brand img {
  display: block;
  width: auto;
  height: 34px;
  aspect-ratio: 1672 / 941;
  flex: 0 0 auto;
  object-fit: contain;
  object-position: center;
  filter: drop-shadow(0 5px 10px rgba(39, 91, 188, 0.18));
}

.desktop-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 34px;
  font-size: 14px;
  font-weight: 600;
  color: #525966;
}

.desktop-nav a {
  transition: color 160ms ease;
}

.desktop-nav a:hover,
.desktop-nav a:focus-visible,
.desktop-nav a.is-current {
  color: var(--brand);
}

.nav-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
}

.button,
.text-button,
.text-link,
.mobile-menu-button,
.mobile-nav button,
.dialog-close,
.site-footer button {
  border: 0;
  cursor: pointer;
}

.button {
  min-height: 46px;
  padding: 11px 21px;
  border: 1px solid var(--brand);
  border-radius: 12px;
  color: #fff;
  background: var(--brand);
  font-size: 15px;
  font-weight: 700;
  box-shadow: 0 10px 24px rgba(66, 99, 242, 0.2);
  transition: transform 160ms ease, background 160ms ease, border-color 160ms ease, box-shadow 160ms ease;
}

.button:hover {
  background: var(--brand-dark);
  border-color: var(--brand-dark);
  box-shadow: 0 13px 30px rgba(66, 99, 242, 0.27);
  transform: translateY(-1px);
}

.button:active {
  transform: translateY(0);
}

.button:focus-visible,
.text-button:focus-visible,
.text-link:focus-visible,
.mobile-menu-button:focus-visible,
.workflow-step:focus-visible,
.platform-tab:focus-visible,
.mode-button:focus-visible,
.dialog-close:focus-visible,
summary:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 3px solid rgba(66, 99, 242, 0.28);
  outline-offset: 3px;
}

.button-small {
  min-height: 42px;
  padding: 9px 18px;
  border-radius: 10px;
  font-size: 14px;
}

.button-secondary {
  color: var(--ink);
  background: #fff;
  border-color: var(--line);
  box-shadow: none;
}

.button-secondary:hover {
  color: var(--brand);
  background: #fff;
  border-color: #bdc7fa;
  box-shadow: none;
}

.text-button,
.text-link {
  padding: 10px 6px;
  background: transparent;
  font-size: 14px;
  font-weight: 650;
}

.text-button:hover,
.text-link:hover {
  color: var(--brand);
}

.text-link {
  text-decoration: underline;
  text-decoration-color: #bcc4cf;
  text-underline-offset: 5px;
}

.text-link-blue {
  padding-left: 0;
  color: var(--brand);
  text-decoration-color: #aebcf8;
}

.mobile-menu-button,
.mobile-nav {
  display: none;
}

.hero {
  width: min(var(--container), calc(100% - 48px));
  min-height: 680px;
  margin: 0 auto;
  padding: 112px 0 54px;
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(500px, 1.08fr);
  align-items: center;
  gap: 50px;
}

.hero-copy {
  max-width: 575px;
}

.product-name,
.section-label {
  margin-bottom: 14px;
  color: var(--brand);
  font-size: 14px;
  font-weight: 760;
  letter-spacing: 0.14em;
}

.hero h1 {
  margin-bottom: 18px;
  font-size: clamp(46px, 3.8vw, 60px);
  font-weight: 790;
  line-height: 1.1;
  letter-spacing: -0.055em;
}

.hero-subtitle {
  margin-bottom: 10px;
  font-size: 21px;
  font-weight: 710;
  letter-spacing: -0.025em;
}

.hero-description {
  max-width: 560px;
  margin-bottom: 12px;
  color: #4e5562;
  font-size: 15px;
  line-height: 1.78;
}

.agent-promise {
  margin: 6px 0 22px;
  display: flex;
  align-items: center;
  gap: 12px;
  color: #4f5866;
  font-size: 13px;
}

.agent-promise strong {
  padding: 7px 10px;
  border-radius: 8px;
  color: #3048bd;
  background: var(--brand-soft);
  font-weight: 760;
}

.agent-promise span {
  font-weight: 650;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.download-direct {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.platform-line {
  margin-top: 24px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  color: #555d69;
  font-size: 13px;
}

.platform-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}

.platform-item img,
.platform-tab img {
  width: 21px;
  height: 21px;
  object-fit: contain;
}

.mode-note {
  padding-left: 16px;
  border-left: 1px solid var(--line);
  font-weight: 650;
  color: var(--brand);
}

.hero-visual {
  position: relative;
  min-width: 0;
}

.product-frame {
  overflow: hidden;
  border: 1px solid #dfe2e8;
  border-radius: 20px;
  background: #f2f3f6;
  box-shadow: var(--shadow);
}

.frame-bar {
  height: 46px;
  padding: 0 18px;
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  color: #757d88;
  background: rgba(255, 255, 255, 0.96);
  font-size: 12px;
  font-weight: 650;
}

.hero-visual .product-frame {
  transform: perspective(1600px) rotateY(-2deg) rotateX(0.8deg);
  transform-origin: center left;
}

.hero-visual .product-frame img,
.story-media img {
  width: 100%;
  height: auto;
}

.visual-caption {
  position: absolute;
  right: -18px;
  bottom: -28px;
  margin: 0;
  padding: 14px 18px;
  border: 1px solid var(--line);
  border-radius: 14px;
  display: flex;
  align-items: center;
  gap: 14px;
  background: #fff;
  box-shadow: var(--shadow-soft);
  color: var(--muted);
  font-size: 12px;
}

.visual-caption strong {
  color: var(--success);
}

.proof-strip {
  width: min(var(--container), calc(100% - 48px));
  margin: 0 auto;
  padding: 17px 24px;
  border: 1px solid var(--line);
  border-radius: 16px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  background: #fff;
  box-shadow: 0 8px 24px rgba(31, 32, 37, 0.04);
}

.proof-strip p {
  margin: 0;
  border-right: 1px solid var(--line);
  color: #4f5663;
  text-align: center;
  font-size: 14px;
  font-weight: 650;
}

.proof-strip p:last-child {
  border-right: 0;
}

.section {
  width: min(var(--container), calc(100% - 48px));
  margin: 0 auto;
  padding: 96px 0;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 46px;
}

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

.section-heading h2,
.story-copy h2,
.workflow-heading h2,
.final-cta h2,
.cooperation h2 {
  margin-bottom: 20px;
  font-size: clamp(34px, 3.25vw, 49px);
  font-weight: 770;
  line-height: 1.16;
  letter-spacing: -0.05em;
}

.section-heading > p:last-child,
.story-copy > p,
.workflow-heading > p:last-child {
  color: var(--muted);
  font-size: 15px;
}

.value-flow {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  background: #fff;
  box-shadow: var(--shadow-soft);
}

.value-flow article {
  min-height: 190px;
  padding: 26px 24px;
  border-right: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}

.value-flow article:last-child {
  border-right: 0;
}

.value-flow span {
  margin-bottom: auto;
  color: var(--brand);
  font-size: 13px;
  font-weight: 760;
  font-variant-numeric: tabular-nums;
}

.value-flow h3 {
  margin-bottom: 10px;
  font-size: 22px;
  letter-spacing: -0.02em;
}

.value-flow p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.value-flow .value-flow-result {
  color: #fff;
  background: var(--brand);
}

.value-flow-result span,
.value-flow-result p {
  color: #e2e7ff;
}

.sales-demo-section {
  background: #f1f3f8;
}

.sales-demo-heading {
  margin-bottom: 36px;
  display: grid;
  grid-template-columns: 1fr 0.72fr;
  align-items: end;
  gap: 58px;
}

.sales-demo-heading h2 {
  margin-bottom: 0;
  font-size: clamp(38px, 3.8vw, 54px);
  line-height: 1.12;
  letter-spacing: -0.055em;
}

.sales-demo-heading > div:last-child {
  padding-bottom: 4px;
}

.sales-demo-heading > div:last-child p {
  margin-bottom: 22px;
  color: var(--muted);
  font-size: 16px;
}

.sales-video-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

.sales-video-card {
  border: 1px solid #dfe3ec;
  border-radius: 20px;
  overflow: hidden;
  background: #fff;
  box-shadow: var(--shadow-soft);
}

.sales-video-card-head {
  min-height: 64px;
  padding: 14px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.sales-video-card-head > div {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 730;
}

.sales-video-card-head img {
  width: 32px;
  height: 32px;
  border-radius: 8px;
}

.sales-video-card-head small,
.sales-demo-note {
  color: #858c99;
  font-size: 12px;
}

.conversation-video {
  width: 100%;
  aspect-ratio: 16 / 9;
  display: block;
  background: #eef1f6;
}

.sales-video-copy {
  padding: 20px 22px 23px;
}

.sales-video-copy h3 {
  margin-bottom: 9px;
  font-size: 21px;
  letter-spacing: -0.025em;
}

.sales-video-copy p {
  margin-bottom: 20px;
  color: var(--muted);
  font-size: 14px;
}

.sales-video-copy ol {
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  list-style: none;
  counter-reset: sales-step;
}

.sales-video-copy li {
  min-width: 0;
  padding: 11px 8px;
  border-top: 1px solid var(--line);
  border-right: 1px solid var(--line);
  color: #555d6c;
  text-align: center;
  font-size: 12px;
}

.sales-video-copy li:last-child {
  border-right: 0;
}

.sales-demo-note {
  margin: 18px 0 0;
  text-align: center;
}

.workflow {
  color: #fff;
  background: var(--dark);
}

.workflow-shell {
  width: min(var(--container), calc(100% - 48px));
  margin: 0 auto;
  padding: 94px 0;
}

.workflow-heading {
  max-width: 700px;
  margin-bottom: 38px;
}

.section-label-light {
  color: #91a5ff;
}

.workflow-heading > p:last-child {
  color: #aeb6cd;
}

.workflow-steps {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 1px;
  border: 1px solid #303757;
  border-radius: 16px;
  overflow: hidden;
  background: #303757;
}

.workflow-step {
  min-height: 98px;
  padding: 15px;
  border: 0;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: space-between;
  color: #aab2c8;
  background: var(--dark-soft);
  font-size: 14px;
  font-weight: 650;
  cursor: pointer;
  transition: color 160ms ease, background 160ms ease;
}

.workflow-step span {
  font-size: 12px;
  font-variant-numeric: tabular-nums;
}

.workflow-step:hover,
.workflow-step.is-active {
  color: #fff;
  background: var(--brand);
}

.workflow-detail {
  margin-top: 22px;
  padding: 28px 32px;
  border: 1px solid #303757;
  border-radius: 16px;
  display: grid;
  grid-template-columns: 140px 1fr 1.45fr;
  align-items: center;
  gap: 24px;
  background: #151a35;
}

.workflow-detail p,
.workflow-detail h3 {
  margin: 0;
}

.workflow-status {
  color: #92a8ff;
  font-size: 13px;
  font-weight: 700;
}

.workflow-detail h3 {
  font-size: 23px;
  line-height: 1.35;
}

.workflow-detail > p:last-child {
  color: #adb5c9;
  font-size: 14px;
}

.capability-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  column-gap: 80px;
}

.capability-grid article {
  padding: 27px 0;
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: 46px 1fr;
  column-gap: 18px;
}

.capability-grid article > span {
  grid-row: 1 / 3;
  color: var(--brand);
  font-size: 13px;
  font-weight: 760;
}

.capability-grid h3 {
  margin-bottom: 8px;
  font-size: 21px;
  line-height: 1.35;
}

.capability-grid p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 15px;
}

.product-story {
  display: grid;
  grid-template-columns: 0.78fr 1.22fr;
  align-items: center;
  gap: 64px;
}

.product-story-reverse {
  grid-template-columns: 1.22fr 0.78fr;
}

.product-story-reverse .story-copy {
  order: 2;
}

.product-story-reverse .story-media {
  order: 1;
}

.story-copy h2 {
  font-size: clamp(34px, 3vw, 46px);
}

.story-copy > p {
  line-height: 1.85;
}

.clean-list {
  margin: 28px 0 24px;
  padding: 0;
  list-style: none;
}

.unlimited-agent {
  margin: 26px 0 4px;
  padding: 18px 20px;
  border-left: 3px solid var(--brand);
  display: grid;
  gap: 3px;
  background: var(--brand-soft);
}

.unlimited-agent strong {
  color: #3048bd;
  font-size: 15px;
}

.unlimited-agent span {
  color: #555e70;
  font-size: 13px;
}

.clean-list li {
  padding: 11px 0;
  border-bottom: 1px solid var(--line);
  color: #505865;
  font-size: 14px;
}

.clean-list li:first-child {
  border-top: 1px solid var(--line);
}

.product-frame-large {
  border-radius: 18px;
  box-shadow: 0 22px 65px rgba(31, 32, 37, 0.11);
}

.story-quote,
.boundary-note {
  margin-top: 24px;
  padding: 18px 20px;
  border-left: 3px solid var(--brand);
  color: #39405a !important;
  background: var(--brand-soft);
  font-size: 14px !important;
  font-weight: 650;
}

.platform-section {
  background: #f1f3f8;
}

.platform-showcase {
  border: 1px solid #dfe2e8;
  border-radius: var(--radius);
  overflow: hidden;
  background: #fff;
  box-shadow: var(--shadow-soft);
}

.platform-tabs {
  padding: 18px;
  border-bottom: 1px solid var(--line);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
}

.platform-tab {
  min-height: 58px;
  padding: 12px 14px;
  border: 1px solid transparent;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background: #f7f8fa;
  font-size: 14px;
  font-weight: 680;
  cursor: pointer;
}

.platform-tab:hover,
.platform-tab.is-active {
  color: var(--brand);
  border-color: #bdc7fa;
  background: var(--brand-soft);
}

.platform-content {
  min-height: 230px;
  padding: 38px;
  display: grid;
  grid-template-columns: 1fr 0.8fr;
  align-items: center;
  gap: 70px;
}

.platform-kicker {
  margin-bottom: 8px;
  color: var(--brand);
  font-size: 13px;
  font-weight: 750;
}

.platform-content h3 {
  margin-bottom: 12px;
  font-size: 30px;
  letter-spacing: -0.035em;
}

.platform-content > div > p:last-child {
  margin-bottom: 0;
  color: var(--muted);
}

.mode-switcher {
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 16px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  background: #f7f8fa;
}

.mode-button {
  min-height: 44px;
  border: 0;
  border-radius: 10px;
  background: transparent;
  color: #616977;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
}

.mode-button.is-active {
  color: #fff;
  background: var(--brand);
}

.mode-switcher p {
  grid-column: 1 / 3;
  margin: 6px 6px 4px;
  color: var(--muted);
  font-size: 13px;
}

.control-layout {
  display: grid;
  grid-template-columns: 1fr 0.9fr;
  gap: 72px;
}

.control-list article {
  padding: 22px 0;
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: 135px 1fr;
  gap: 20px;
}

.control-list article:last-child {
  border-bottom: 1px solid var(--line);
}

.control-list span {
  font-weight: 720;
}

.control-list p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.verification-panel {
  padding: 38px;
  border-radius: var(--radius);
  color: #fff;
  background: var(--dark);
}

.verification-label {
  margin-bottom: 6px;
  color: #96a8fa;
  font-size: 13px;
  font-weight: 700;
}

.verification-panel h3 {
  margin-bottom: 28px;
  font-size: 28px;
}

.verification-panel ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

.verification-panel li {
  padding: 18px 0;
  border-top: 1px solid #303757;
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 10px;
  color: #c2c8d9;
  font-size: 14px;
}

.verification-panel li span {
  color: #8299ff;
  font-size: 12px;
  font-weight: 700;
}

.scenario-section {
  color: #fff;
  background: var(--dark);
}

.section-heading-dark h2 {
  color: #fff;
}

.scenario-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid #303757;
  border-left: 1px solid #303757;
}

.scenario-grid article {
  min-height: 190px;
  padding: 24px;
  border-right: 1px solid #303757;
  border-bottom: 1px solid #303757;
}

.scenario-grid article > p {
  color: #7f96ff;
  font-size: 12px;
  font-weight: 700;
}

.scenario-grid h3 {
  margin: 46px 0 9px;
  font-size: 22px;
}

.scenario-grid span {
  color: #aeb6c9;
  font-size: 14px;
}

.cooperation {
  display: grid;
  grid-template-columns: 0.75fr 1.25fr;
  gap: 64px;
}

.cooperation h2 {
  font-size: clamp(34px, 3.1vw, 46px);
}

.cooperation-intro > p:not(.section-label) {
  max-width: 430px;
  color: var(--muted);
  font-size: 15px;
}

.cooperation-actions,
.dialog-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.cooperation-actions {
  margin-top: 26px;
}

.cooperation-options article {
  padding: 28px 0;
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 30px;
}

.cooperation-options article:last-child {
  border-bottom: 1px solid var(--line);
}

.cooperation-options h3,
.cooperation-options p {
  margin: 0;
}

.cooperation-options h3 {
  font-size: 18px;
}

.cooperation-options p {
  color: var(--muted);
  font-size: 14px;
}

.faq {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 64px;
}

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

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

.faq-list summary {
  padding: 25px 8px 25px 0;
  font-size: 17px;
  font-weight: 700;
  cursor: pointer;
}

.faq-list details p {
  margin: -4px 0 24px;
  padding-right: 34px;
  color: var(--muted);
  font-size: 14px;
}

.final-cta {
  width: min(var(--container), calc(100% - 48px));
  margin: 0 auto 44px;
  padding: 52px 58px;
  border-radius: 26px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 50px;
  color: #fff;
  background: var(--brand);
}

.final-cta > div > p {
  margin-bottom: 10px;
  color: #dce2ff;
  font-size: 13px;
  font-weight: 720;
  letter-spacing: 0.13em;
}

.final-cta h2 {
  margin-bottom: 10px;
  font-size: clamp(32px, 2.6vw, 42px);
}

.final-cta span {
  color: #e3e7ff;
}

.final-actions {
  display: flex;
  gap: 10px;
  flex: 0 0 auto;
}

.button-light {
  color: var(--brand);
  background: #fff;
  border-color: #fff;
  box-shadow: none;
}

.button-light:hover {
  color: var(--brand-dark);
  background: #f8f9ff;
  border-color: #f8f9ff;
  box-shadow: none;
}

.button-dark-outline {
  color: #fff;
  background: transparent;
  border-color: rgba(255, 255, 255, 0.5);
  box-shadow: none;
}

.button-dark-outline:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
  border-color: #fff;
  box-shadow: none;
}

.site-footer {
  width: min(var(--container), calc(100% - 48px));
  margin: 0 auto;
  padding: 32px 0 46px;
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  align-items: center;
  gap: 24px;
  color: var(--muted);
  font-size: 13px;
}

.footer-brand {
  font-size: 17px;
  color: var(--ink);
}

.footer-brand img {
  width: auto;
  height: 30px;
  aspect-ratio: 1672 / 941;
  object-fit: contain;
}

.site-footer p {
  margin: 0;
  text-align: center;
}

.site-footer > div {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 16px;
}

.site-footer button {
  padding: 0;
  color: var(--muted);
  background: transparent;
  font-size: 13px;
}

.site-footer button:hover {
  color: var(--brand);
}

.dialog {
  width: min(650px, calc(100% - 32px));
  max-height: calc(100dvh - 32px);
  padding: 0;
  border: 0;
  border-radius: 24px;
  background: transparent;
  box-shadow: 0 28px 90px rgba(9, 12, 29, 0.28);
}

.dialog-wide {
  width: min(980px, calc(100% - 32px));
}

.dialog::backdrop {
  background: rgba(14, 18, 38, 0.58);
  backdrop-filter: blur(8px);
}

.dialog-card {
  margin: 0;
  padding: 34px;
  color: var(--ink);
  background: #fff;
}

.dialog-head {
  margin-bottom: 28px;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 30px;
}

.dialog-head p {
  margin-bottom: 5px;
  color: var(--brand);
  font-size: 13px;
  font-weight: 730;
}

.dialog-head h2 {
  margin: 0;
  font-size: 28px;
  line-height: 1.25;
  letter-spacing: -0.035em;
}

.dialog-close {
  padding: 8px;
  background: transparent;
  color: var(--muted);
  font-size: 13px;
}

.dialog-close:hover {
  color: var(--ink);
}

.contact-close {
  width: 38px;
  height: 38px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 24px;
  font-weight: 300;
  line-height: 1;
}

.demo-video {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 16px;
  display: block;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  background: #10142a;
}

.demo-video-large {
  border-radius: 18px;
}

.demo-summary {
  margin: 18px 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
}

.demo-summary span {
  padding: 13px 10px;
  border-right: 1px solid var(--line);
  color: #46506a;
  background: #f7f8fb;
  text-align: center;
  font-size: 13px;
  font-weight: 700;
}

.demo-summary span:last-child {
  border-right: 0;
  color: #fff;
  background: var(--brand);
}

.contact-dialog {
  width: min(420px, calc(100% - 32px));
}

.contact-card {
  padding: 28px 30px 30px;
  text-align: center;
}

.contact-head {
  margin-bottom: 20px;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  text-align: left;
}

.contact-head p {
  margin: 0 0 3px;
  color: var(--brand);
  font-size: 12px;
  font-weight: 740;
}

.contact-head h2 {
  margin: 0;
  font-size: 24px;
  letter-spacing: -0.03em;
}

.contact-qr {
  width: min(286px, 100%);
  height: auto;
  margin: 0 auto 14px;
  border-radius: 18px;
  display: block;
  background: #fff;
  box-shadow: 0 14px 34px rgba(28, 49, 113, 0.13);
}

.contact-scan {
  margin: 0;
  color: #8a919d;
  font-size: 13px;
}

.demo-timeline {
  margin-bottom: 24px;
}

.demo-timeline article {
  padding: 18px 0;
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: 45px 1fr;
  gap: 10px;
}

.demo-timeline article > span {
  color: var(--brand);
  font-size: 12px;
  font-weight: 720;
}

.demo-timeline h3 {
  margin-bottom: 4px;
  font-size: 17px;
}

.demo-timeline p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.download-card {
  padding: 32px;
}

.download-options {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.download-option {
  min-height: 154px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 16px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: flex-end;
  background: #f8f9fc;
  transition: transform 160ms ease, border-color 160ms ease, box-shadow 160ms ease;
}

.download-option:hover,
.download-option:focus-visible {
  border-color: #bac5fa;
  box-shadow: 0 12px 28px rgba(66, 99, 242, 0.1);
  transform: translateY(-2px);
}

.download-system {
  margin-bottom: auto;
  color: var(--brand);
  font-size: 13px;
  font-weight: 760;
}

.download-option strong {
  font-size: 18px;
}

.download-option small {
  margin-top: 4px;
  color: #8a919d;
  font-size: 12px;
}

@media (prefers-reduced-motion: no-preference) {
  .hero-copy,
  .hero-visual {
    animation: reveal 640ms ease both;
  }

  .hero-visual {
    animation-delay: 100ms;
  }

  @keyframes reveal {
    from {
      opacity: 0;
      transform: translateY(16px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }
}

@media (max-width: 1080px) {
  .desktop-nav {
    gap: 18px;
  }

  .desktop-download {
    display: none;
  }

  .hero {
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }

  .hero h1 {
    font-size: 50px;
  }

  .product-story,
  .product-story-reverse {
    gap: 48px;
  }
}

@media (max-width: 1040px) {
  .desktop-nav {
    display: none;
  }

  .mobile-menu-button {
    min-height: 40px;
    padding: 8px 12px;
    border: 1px solid var(--line);
    border-radius: 10px;
    display: inline-flex;
    align-items: center;
    background: #fff;
    font-size: 13px;
    font-weight: 700;
  }

  .mobile-nav {
    width: min(100%, calc(100% - 32px));
    margin: 0 auto 14px;
    padding: 14px;
    border: 1px solid var(--line);
    border-radius: 14px;
    background: #fff;
    box-shadow: var(--shadow-soft);
  }

  .mobile-nav:not([hidden]) {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 4px;
  }

  .mobile-nav a,
  .mobile-nav button {
    padding: 10px;
    border-radius: 8px;
    background: transparent;
    color: #505865;
    text-align: left;
    font-size: 14px;
    font-weight: 620;
  }

  .mobile-nav a:hover,
  .mobile-nav button:hover {
    color: var(--brand);
    background: var(--brand-soft);
  }
}

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

  .mobile-menu-button {
    min-height: 40px;
    padding: 8px 12px;
    border: 1px solid var(--line);
    border-radius: 10px;
    display: inline-flex;
    align-items: center;
    background: #fff;
    font-size: 13px;
    font-weight: 700;
  }

  .mobile-nav {
    width: min(100%, calc(100% - 32px));
    margin: 0 auto 14px;
    padding: 14px;
    border: 1px solid var(--line);
    border-radius: 14px;
    background: #fff;
    box-shadow: var(--shadow-soft);
  }

  .mobile-nav:not([hidden]) {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 4px;
  }

  .mobile-nav a,
  .mobile-nav button {
    padding: 10px;
    border-radius: 8px;
    background: transparent;
    color: #505865;
    text-align: left;
    font-size: 14px;
    font-weight: 620;
  }

  .mobile-nav a:hover,
  .mobile-nav button:hover {
    color: var(--brand);
    background: var(--brand-soft);
  }

  .hero {
    min-height: auto;
    padding: 112px 0 72px;
    grid-template-columns: 1fr;
  }

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

  .hero-visual {
    width: min(760px, 100%);
  }

  .hero-visual .product-frame {
    transform: none;
  }

  .visual-caption {
    right: 14px;
  }

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

  .sales-demo-heading {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .workflow-detail {
    grid-template-columns: 120px 1fr;
  }

  .workflow-detail > p:last-child {
    grid-column: 1 / 3;
  }

  .product-story,
  .product-story-reverse,
  .control-layout,
  .cooperation,
  .faq {
    grid-template-columns: 1fr;
  }

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

  .product-story {
    gap: 42px;
  }

  .platform-content {
    grid-template-columns: 1fr;
    gap: 35px;
  }

  .control-layout,
  .cooperation,
  .faq {
    gap: 42px;
  }

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

  .faq .section-heading {
    margin-bottom: 0;
  }

  .final-cta {
    padding: 52px;
    align-items: flex-start;
    flex-direction: column;
  }

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

  .site-footer > p {
    display: none;
  }
}

@media (max-width: 680px) {
  .nav-shell,
  .hero,
  .proof-strip,
  .section,
  .workflow-shell,
  .site-footer,
  .final-cta {
    width: min(100% - 32px, var(--container));
  }

  .nav-shell {
    height: 64px;
  }

  .brand {
    font-size: 18px;
  }

  .brand img {
    width: auto;
    height: 30px;
  }

  .nav-actions .button-small {
    min-height: 40px;
    padding: 8px 13px;
  }

  .hero {
    padding: 96px 0 66px;
    gap: 48px;
  }

  .hero h1 {
    font-size: 36px;
    line-height: 1.12;
  }

  .hero-subtitle {
    font-size: 20px;
  }

  .hero-description {
    font-size: 16px;
    line-height: 1.8;
  }

  .hero-actions {
    align-items: stretch;
  }

  .agent-promise {
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
  }

  .hero-actions .button {
    flex: 1 1 calc(50% - 6px);
    padding-right: 16px;
    padding-left: 16px;
  }

  .hero-actions .text-link {
    flex-basis: 100%;
    text-align: left;
  }

  .platform-line {
    gap: 13px;
  }

  .mode-note {
    width: 100%;
    padding: 8px 0 0;
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .frame-bar {
    height: 40px;
  }

  .visual-caption {
    position: static;
    margin: 12px 0 0;
    justify-content: space-between;
    box-shadow: none;
  }

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

  .proof-strip p {
    padding: 15px 10px;
    border-bottom: 1px solid var(--line);
    font-size: 12px;
  }

  .proof-strip p:nth-child(2) {
    border-right: 0;
  }

  .proof-strip p:nth-child(3),
  .proof-strip p:nth-child(4) {
    border-bottom: 0;
  }

  .section {
    padding: 78px 0;
  }

  .section-heading {
    margin-bottom: 42px;
  }

  .section-heading h2,
  .story-copy h2,
  .workflow-heading h2,
  .cooperation h2 {
    font-size: 36px;
  }

  .value-flow {
    grid-template-columns: repeat(2, 1fr);
    border-radius: 15px;
  }

  .value-flow article {
    min-height: 190px;
    border-bottom: 1px solid var(--line);
  }

  .value-flow article:nth-child(2) {
    border-right: 0;
  }

  .value-flow article:nth-child(3),
  .value-flow article:nth-child(4) {
    border-bottom: 0;
  }

  .workflow-shell {
    padding: 78px 0;
  }

  .sales-video-grid {
    grid-template-columns: 1fr;
  }

  .sales-demo-heading h2 {
    font-size: 38px;
  }

  .sales-video-card-head {
    align-items: flex-start;
    flex-direction: column;
    gap: 5px;
  }

  .sales-video-copy {
    padding: 22px 20px 24px;
  }

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

  .workflow-step {
    min-height: 96px;
  }

  .workflow-detail {
    padding: 26px;
    grid-template-columns: 1fr;
  }

  .workflow-detail > p:last-child {
    grid-column: 1;
  }

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

  .capability-grid article {
    grid-template-columns: 38px 1fr;
  }

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

  .platform-content {
    min-height: auto;
    padding: 30px 24px;
  }

  .control-list article,
  .cooperation-options article {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .verification-panel {
    padding: 28px;
  }

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

  .scenario-grid article {
    min-height: 185px;
  }

  .scenario-grid h3 {
    margin-top: 44px;
  }

  .faq-list summary {
    padding-right: 0;
  }

  .final-cta {
    margin-bottom: 28px;
    padding: 40px 28px;
    border-radius: 20px;
  }

  .final-cta h2 {
    font-size: 34px;
  }

  .final-actions {
    width: 100%;
    flex-direction: column;
  }

  .site-footer {
    padding-bottom: 34px;
    grid-template-columns: 1fr;
  }

  .site-footer > div {
    flex-wrap: wrap;
    justify-content: flex-start;
  }

  .dialog-card {
    padding: 26px 22px;
  }

  .dialog-head h2 {
    font-size: 24px;
  }

  .download-options {
    grid-template-columns: 1fr;
  }

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

  .demo-summary span:nth-child(2) {
    border-right: 0;
  }

  .demo-summary span:nth-child(1),
  .demo-summary span:nth-child(2) {
    border-bottom: 1px solid var(--line);
  }

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

@media (max-width: 440px) {
  .nav-actions .button-small {
    display: none;
  }

  .hero-actions .button {
    flex-basis: 100%;
  }

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

  .value-flow article,
  .value-flow article:nth-child(2),
  .value-flow article:nth-child(3) {
    min-height: 170px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .value-flow article:last-child {
    border-bottom: 0;
  }
}