:root {
  color-scheme: light;
  --bg: #f5f8fb;
  --surface: #ffffff;
  --surface-soft: #edf3f8;
  --ink: #102035;
  --muted: #5d6c7e;
  --line: #d9e3ec;
  --blue: #176bff;
  --blue-deep: #0c4fc7;
  --green: #159c84;
  --navy: #0b1728;
  --radius: 18px;
  --shadow: 0 22px 70px rgba(23, 70, 116, 0.12);
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Microsoft YaHei UI", "PingFang SC", "Noto Sans CJK SC", system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
}

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

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

button,
summary {
  font: inherit;
}

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

button:focus-visible,
a:focus-visible,
summary:focus-visible {
  outline: 3px solid rgba(23, 107, 255, 0.35);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  left: 16px;
  top: -80px;
  z-index: 200;
  padding: 12px 18px;
  border-radius: 10px;
  background: var(--navy);
  color: #fff;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 16px;
}

.shell {
  width: min(1240px, calc(100% - 48px));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: 72px;
  border-bottom: 1px solid rgba(217, 227, 236, 0.8);
  background: rgba(245, 248, 251, 0.9);
  backdrop-filter: blur(18px) saturate(150%);
}

.nav-shell {
  height: 100%;
  display: flex;
  align-items: center;
  gap: 28px;
}

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

.brand img {
  width: 34px;
  height: 34px;
  object-fit: contain;
}

.brand span {
  display: grid;
  line-height: 1;
}

.brand strong {
  font-size: 18px;
  letter-spacing: -0.04em;
}

.brand small {
  margin-top: 5px;
  color: var(--muted);
  font-size: 9px;
  font-weight: 800;
  letter-spacing: 0.13em;
}

.site-nav {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 26px;
}

.site-nav a {
  color: #31445a;
  font-size: 14px;
  font-weight: 700;
  transition: color 0.2s ease;
}

.site-nav a:hover {
  color: var(--blue);
}

.menu-button {
  display: none;
}

.button {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 24px;
  border: 1px solid var(--blue);
  border-radius: 12px;
  background: var(--blue);
  color: #fff;
  font-size: 15px;
  font-weight: 800;
  white-space: nowrap;
  box-shadow: 0 12px 28px rgba(23, 107, 255, 0.2);
  transition: transform 0.25s var(--ease), background 0.25s ease, box-shadow 0.25s ease;
}

.button:hover {
  background: var(--blue-deep);
  box-shadow: 0 16px 34px rgba(23, 107, 255, 0.26);
  transform: translateY(-2px);
}

.button:active {
  transform: scale(0.98);
}

.button-small {
  min-height: 42px;
  padding-inline: 18px;
  font-size: 14px;
}

.text-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  color: var(--blue);
  font-size: 15px;
  font-weight: 800;
  border-bottom: 1px solid rgba(23, 107, 255, 0.32);
}

.text-link:hover {
  border-color: var(--blue);
}

.hero {
  position: relative;
  overflow: hidden;
  padding: 54px 0 0;
  background:
    radial-gradient(circle at 88% 18%, rgba(21, 156, 132, 0.13), transparent 28%),
    radial-gradient(circle at 62% 4%, rgba(23, 107, 255, 0.13), transparent 24%),
    linear-gradient(180deg, #f9fbfd 0%, #eef5fa 100%);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(16, 32, 53, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(16, 32, 53, 0.035) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.7), transparent 88%);
}

.hero-grid {
  position: relative;
  min-height: calc(100dvh - 164px);
  display: grid;
  grid-template-columns: 0.88fr 1.12fr;
  align-items: center;
  gap: 64px;
  padding-bottom: 56px;
}

.hero-copy {
  position: relative;
  z-index: 2;
}

.eyebrow {
  margin: 0 0 22px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.hero h1 {
  max-width: 720px;
  margin: 0;
  font-size: clamp(48px, 5.2vw, 76px);
  line-height: 1.08;
  letter-spacing: -0.065em;
  text-wrap: balance;
}

.hero h1 span {
  display: block;
  white-space: nowrap;
}

.hero-lead {
  max-width: 590px;
  margin: 26px 0 0;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 24px;
  margin-top: 34px;
}

.hero-media {
  position: relative;
  min-width: 0;
  padding-bottom: 56px;
}

.hero-media-primary {
  margin: 0;
  overflow: hidden;
  aspect-ratio: 4 / 3;
  border-radius: var(--radius);
  background: #dbe6ef;
  box-shadow: var(--shadow);
}

.hero-media-primary img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-watch-inset {
  position: absolute;
  left: -42px;
  bottom: 0;
  width: 44%;
  margin: 0;
  overflow: hidden;
  aspect-ratio: 1.3 / 1;
  border: 8px solid rgba(255, 255, 255, 0.92);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: 0 18px 42px rgba(11, 23, 40, 0.18);
}

.hero-watch-inset img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 38% center;
}

.hero-media-note {
  position: absolute;
  right: -18px;
  bottom: 28px;
  width: 218px;
  padding: 18px;
  border: 1px solid rgba(255, 255, 255, 0.72);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.84);
  backdrop-filter: blur(16px);
  box-shadow: 0 16px 36px rgba(30, 78, 119, 0.14);
}

.hero-media-note strong,
.hero-media-note span {
  display: block;
}

.hero-media-note strong {
  margin-bottom: 6px;
  font-size: 15px;
}

.hero-media-note span {
  color: var(--muted);
  font-size: 12px;
  line-height: 1.55;
}

.value-strip {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.52);
}

.value-strip div {
  min-height: 112px;
  display: grid;
  align-content: center;
  padding: 22px 32px;
  border-right: 1px solid var(--line);
}

.value-strip div:last-child {
  border-right: 0;
}

.value-strip strong,
.value-strip span {
  display: block;
}

.value-strip strong {
  margin-bottom: 7px;
  font-size: 17px;
}

.value-strip span {
  color: var(--muted);
  font-size: 13px;
}

.section {
  padding: 112px 0;
}

.section-heading {
  max-width: 830px;
  margin-bottom: 54px;
}

.section-heading.compact {
  max-width: 700px;
}

.section-heading h2,
.privacy-copy h2,
.ecosystem-copy h2,
.agents-intro h2,
.faq-heading h2,
.contact-copy h2 {
  margin: 0;
  font-size: clamp(34px, 4vw, 58px);
  line-height: 1.14;
  letter-spacing: -0.055em;
  text-wrap: balance;
}

.section-heading p,
.privacy-copy > p,
.ecosystem-copy > p,
.agents-intro > p,
.faq-heading p,
.contact-copy > p {
  max-width: 680px;
  margin: 20px 0 0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.8;
}

.system-section {
  background: var(--surface);
}

.system-composition {
  display: grid;
  grid-template-columns: 1.12fr 0.88fr 0.82fr;
  gap: 24px;
}

.system-watch,
.system-mobile,
.system-host {
  min-width: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.system-watch {
  display: flex;
  flex-direction: column;
  background: #eef4f9;
}

.system-mobile {
  display: flex;
  flex-direction: column;
  background: #f7fafc;
}

.system-host {
  display: flex;
  flex-direction: column;
  background:
    radial-gradient(circle at 62% 24%, rgba(23, 107, 255, 0.17), transparent 30%),
    #0b1728;
  color: #fff;
}

.terminal-flow {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  align-items: center;
  gap: 18px;
  margin: -26px 0 28px;
  padding: 17px 22px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  color: #274057;
}

.terminal-flow strong {
  text-align: center;
  font-size: 14px;
}

.terminal-flow span {
  color: var(--green);
  font-size: 12px;
  font-weight: 800;
}

.media-frame {
  min-height: 330px;
  overflow: hidden;
}

.media-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 40% center;
}

.mobile-stage {
  min-height: 330px;
  display: grid;
  place-items: center;
  padding: 26px 24px 0;
  background:
    linear-gradient(rgba(23, 107, 255, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(23, 107, 255, 0.06) 1px, transparent 1px),
    linear-gradient(145deg, #dce9f5, #f4f8fb);
  background-size: 34px 34px, 34px 34px, auto;
}

.phone-device {
  width: min(100%, 218px);
  padding: 9px;
  border: 1px solid rgba(255, 255, 255, 0.5);
  border-radius: 31px 31px 0 0;
  background: #091525;
  box-shadow: 0 24px 50px rgba(22, 62, 95, 0.22);
}

.phone-screen {
  min-height: 292px;
  padding: 25px 17px 16px;
  border-radius: 23px 23px 0 0;
  background: #f8fbfd;
  color: var(--ink);
}

.phone-topline,
.phone-status-list div {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.phone-topline {
  padding-bottom: 18px;
  border-bottom: 1px solid #d7e2eb;
}

.phone-topline strong {
  color: var(--blue);
  font-size: 9px;
  letter-spacing: 0.12em;
}

.phone-topline span,
.phone-summary span,
.phone-status-list span,
.phone-screen > p {
  color: #72869a;
  font-size: 9px;
}

.phone-summary {
  padding: 18px 0 14px;
}

.phone-summary strong {
  display: block;
  margin-top: 7px;
  font-size: 16px;
  line-height: 1.35;
}

.phone-status-list {
  border-top: 1px solid #d7e2eb;
}

.phone-status-list div {
  padding: 11px 0;
  border-bottom: 1px solid #d7e2eb;
}

.phone-status-list strong {
  color: #2f5f87;
  font-size: 9px;
}

.phone-screen > p {
  margin: 13px 0 0;
  text-align: right;
}

.system-copy {
  padding: 36px;
  margin-top: auto;
  align-self: end;
}

.system-copy span {
  color: var(--blue);
  font-size: 12px;
  font-weight: 800;
}

.system-copy h3 {
  margin: 12px 0 14px;
  font-size: 30px;
  letter-spacing: -0.04em;
}

.system-copy p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.75;
}

.system-host .system-copy span {
  color: #67d4c3;
}

.system-mobile .system-copy span {
  color: var(--green);
}

.system-host .system-copy p {
  color: #aec0d1;
}

.host-product {
  min-height: 330px;
  display: grid;
  place-items: center;
  padding: 20px 28px 0;
}

.host-product img {
  width: min(100%, 340px);
  filter: drop-shadow(0 26px 28px rgba(0, 0, 0, 0.34));
}

.capability-ledger {
  margin-top: 24px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.capability-ledger article {
  padding: 28px 26px;
  border-right: 1px solid var(--line);
}

.capability-ledger article:last-child {
  border-right: 0;
}

.capability-ledger strong {
  display: block;
  margin-bottom: 10px;
  font-size: 17px;
}

.capability-ledger p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.65;
}

.journey-section {
  background: #eef4f9;
}

.journey-track {
  position: relative;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 10px;
}

.journey-track::before {
  content: "";
  position: absolute;
  top: 29px;
  left: 9%;
  right: 9%;
  height: 1px;
  background: #b8c8d7;
}

.journey-step {
  position: relative;
  z-index: 1;
  min-height: 260px;
  padding: 16px 18px 22px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  background: transparent;
  cursor: pointer;
  transition: background 0.35s ease, transform 0.35s var(--ease), box-shadow 0.35s ease;
}

.journey-step > span {
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  margin-bottom: 64px;
  border: 1px solid #9eb2c4;
  border-radius: 50%;
  background: #eef4f9;
  color: transparent;
  font-size: 0;
}

.journey-step > span::after {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #9eb2c4;
}

.journey-step strong {
  display: block;
  margin-bottom: 13px;
  font-size: 19px;
  line-height: 1.4;
}

.journey-step p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.7;
}

.journey-step.is-active {
  transform: translateY(-10px);
  border-color: rgba(23, 107, 255, 0.18);
  background: var(--surface);
  box-shadow: 0 18px 40px rgba(23, 70, 116, 0.1);
}

.journey-step.is-active > span {
  border-color: var(--blue);
  background: var(--blue);
}

.journey-step.is-active > span::after {
  background: #fff;
}

.scenes-section {
  background: var(--surface);
}

.scene-gallery {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  grid-template-rows: repeat(2, 310px);
  gap: 20px;
}

.scene {
  position: relative;
  overflow: hidden;
  min-height: 0;
  border-radius: var(--radius);
  background: var(--navy);
}

.scene-wide {
  grid-row: 1 / 3;
}

.scene img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.8s var(--ease);
}

.scene:hover img {
  transform: scale(1.035);
}

.scene::after {
  content: "";
  position: absolute;
  inset: 35% 0 0;
  background: linear-gradient(transparent, rgba(5, 15, 27, 0.86));
}

.scene div {
  position: absolute;
  z-index: 2;
  left: 28px;
  right: 28px;
  bottom: 26px;
  color: #fff;
}

.scene h3 {
  margin: 0 0 8px;
  font-size: 24px;
}

.scene p {
  max-width: 520px;
  margin: 0;
  color: rgba(255, 255, 255, 0.76);
  font-size: 14px;
  line-height: 1.6;
}

.agents-section {
  background: #e8f0f6;
}

.agents-layout {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 56px;
  align-items: start;
}

.agents-intro {
  position: sticky;
  top: 110px;
}

.agent-tabs {
  margin-top: 34px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  border-top: 1px solid #c8d5e0;
}

.agent-tab {
  min-height: 52px;
  padding: 0 14px;
  border: 0;
  border-right: 1px solid #c8d5e0;
  border-bottom: 1px solid #c8d5e0;
  background: transparent;
  color: #4c5e70;
  text-align: left;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease;
}

.agent-tab:nth-child(even) {
  border-right: 0;
}

.agent-tab:hover,
.agent-tab.is-active {
  background: var(--surface);
  color: var(--blue);
}

.agent-tab.is-active {
  font-weight: 800;
}

.agent-detail {
  min-height: 650px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  padding: 42px;
  border-radius: var(--radius);
  background: var(--navy);
  color: #fff;
  box-shadow: 0 26px 70px rgba(11, 23, 40, 0.2);
}

.agent-number {
  color: #6ad5c5;
  font-size: 11px;
  font-weight: 900;
  letter-spacing: 0.15em;
}

.agent-detail h3 {
  margin: 44px 0 14px;
  font-size: 48px;
  letter-spacing: -0.05em;
}

.agent-detail > p {
  max-width: 540px;
  margin: 0;
  color: #b7c7d6;
  font-size: 17px;
  line-height: 1.75;
}

.agent-detail-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
  margin: 34px 0;
}

.agent-detail-grid div {
  padding: 18px;
  border: 1px solid rgba(255, 255, 255, 0.13);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.04);
}

.agent-detail-grid span,
.agent-detail-grid strong {
  display: block;
}

.agent-detail-grid span {
  margin-bottom: 10px;
  color: #7e95aa;
  font-size: 12px;
}

.agent-detail-grid strong {
  font-size: 14px;
  line-height: 1.6;
}

.agent-visual {
  position: relative;
  isolation: isolate;
  width: 100%;
  height: 300px;
  margin: auto 0 0;
  overflow: hidden;
  border-radius: 14px;
  background: #13243a;
}

.agent-visual::before {
  content: "";
  position: absolute;
  z-index: -1;
  inset: -24px;
  background-image:
    linear-gradient(rgba(11, 23, 40, 0.44), rgba(11, 23, 40, 0.66)),
    var(--agent-image);
  background-position: center;
  background-size: cover;
  filter: blur(20px) saturate(0.8);
  transform: scale(1.12);
}

.agent-visual img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
  filter: saturate(0.88) contrast(1.03);
  transition: opacity 0.25s ease;
}

.privacy-section {
  background: var(--surface);
}

.privacy-grid {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 80px;
  align-items: center;
}

.privacy-copy .text-link {
  margin-top: 28px;
}

.privacy-principles {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.privacy-principles article {
  min-height: 190px;
  padding: 30px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.privacy-principles strong,
.privacy-principles span {
  display: block;
}

.privacy-principles strong {
  margin-bottom: 24px;
  font-size: 19px;
}

.privacy-principles span {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
}

.privacy-principles article:first-child strong,
.privacy-principles article:nth-child(4) strong {
  color: var(--green);
}

.ecosystem-section {
  padding-top: 0;
  background: var(--surface);
}

.ecosystem-layout {
  overflow: hidden;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  border-radius: var(--radius);
  background: #eaf1f7;
}

.ecosystem-media {
  min-height: 520px;
  margin: 0;
}

.ecosystem-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.ecosystem-copy {
  align-self: center;
  padding: 64px;
}

.ecosystem-points {
  margin-top: 34px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  border-top: 1px solid #cbd8e3;
}

.ecosystem-points span {
  padding: 17px 4px;
  border-bottom: 1px solid #cbd8e3;
  color: #33475c;
  font-size: 14px;
  font-weight: 800;
}

.versions-section {
  background: #edf3f8;
}

.version-list {
  border-top: 1px solid #cbd8e3;
}

.version-row {
  display: grid;
  grid-template-columns: 0.65fr 1.2fr 1fr auto;
  gap: 36px;
  align-items: center;
  min-height: 190px;
  padding: 30px;
  border-bottom: 1px solid #cbd8e3;
  transition: background 0.25s ease, transform 0.25s var(--ease);
}

.version-row:hover {
  background: rgba(255, 255, 255, 0.64);
}

.version-row.is-featured {
  margin-inline: -14px;
  padding-inline: 44px;
  border-bottom: 0;
  border-radius: var(--radius);
  background: var(--navy);
  color: #fff;
  box-shadow: 0 24px 58px rgba(11, 23, 40, 0.18);
}

.version-row span {
  display: block;
  margin-bottom: 10px;
  color: var(--blue);
  font-size: 12px;
  font-weight: 800;
}

.version-row.is-featured span {
  color: #63cfbe;
}

.version-row h3 {
  margin: 0;
  font-size: 32px;
  letter-spacing: -0.04em;
}

.version-row p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.75;
}

.version-row.is-featured p {
  color: #b4c5d4;
}

.version-row ul {
  margin: 0;
  padding: 0;
  list-style: none;
  color: #3d5166;
  font-size: 13px;
  line-height: 1.95;
}

.version-row.is-featured ul {
  color: #d6e1eb;
}

.version-row a {
  min-width: 90px;
  min-height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 16px;
  border: 1px solid rgba(23, 107, 255, 0.3);
  border-radius: 10px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 800;
  white-space: nowrap;
}

.version-row.is-featured a {
  border-color: var(--blue);
  background: var(--blue);
  color: #fff;
}

.service-section {
  background: var(--surface);
}

.service-gallery {
  display: grid;
  grid-template-columns: 1fr 1.15fr 0.85fr;
  gap: 20px;
}

.service-item {
  overflow: hidden;
  border-radius: var(--radius);
  background: #edf3f8;
}

.service-item:nth-child(2) {
  margin-top: 44px;
}

.service-item img {
  width: 100%;
  height: 270px;
  object-fit: cover;
}

.service-item div {
  padding: 24px;
}

.service-item strong,
.service-item span {
  display: block;
}

.service-item strong {
  margin-bottom: 8px;
  font-size: 19px;
}

.service-item span {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.6;
}

.faq-section {
  background: #edf3f8;
}

.faq-layout {
  display: grid;
  grid-template-columns: 0.75fr 1.25fr;
  gap: 80px;
}

.faq-heading {
  position: sticky;
  top: 110px;
  align-self: start;
}

.faq-list {
  border-top: 1px solid #c9d6e1;
}

.faq-list details {
  border-bottom: 1px solid #c9d6e1;
}

.faq-list summary {
  min-height: 84px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px 0;
  font-size: 18px;
  font-weight: 800;
  cursor: pointer;
  list-style: none;
}

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

.faq-list summary::after {
  content: "+";
  color: var(--blue);
  font-size: 28px;
  font-weight: 400;
}

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

.faq-list details p {
  max-width: 720px;
  margin: -2px 0 26px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.8;
}

.contact-section {
  padding: 104px 0;
  background:
    radial-gradient(circle at 76% 10%, rgba(21, 156, 132, 0.2), transparent 25%),
    radial-gradient(circle at 30% 0%, rgba(23, 107, 255, 0.24), transparent 30%),
    var(--navy);
  color: #fff;
}

.contact-layout {
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: 64px;
  align-items: center;
}

.contact-copy .eyebrow {
  color: #68d1c1;
}

.contact-copy > p {
  color: #b8c7d4;
}

.contact-phone {
  display: block;
  margin-top: 34px;
  color: #fff;
  font-size: clamp(30px, 4vw, 54px);
  font-weight: 800;
  letter-spacing: -0.04em;
}

.contact-copy > span {
  display: block;
  margin-top: 8px;
  color: #7790a6;
  font-size: 12px;
}

.contact-qr {
  justify-self: end;
  width: min(100%, 390px);
  display: grid;
  grid-template-columns: 148px 1fr;
  gap: 24px;
  align-items: center;
  padding: 24px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.06);
}

.contact-qr img {
  width: 148px;
  height: 148px;
  padding: 8px;
  border-radius: 12px;
  background: #fff;
  object-fit: contain;
}

.contact-qr strong,
.contact-qr span {
  display: block;
}

.contact-qr strong {
  margin-bottom: 8px;
  font-size: 18px;
}

.contact-qr span {
  color: #9eb1c2;
  font-size: 13px;
  line-height: 1.6;
}

.site-footer {
  padding: 48px 0 94px;
  background: #07111f;
  color: #fff;
}

.footer-main {
  display: grid;
  grid-template-columns: 0.6fr 1.2fr 0.8fr;
  gap: 48px;
  align-items: start;
}

.footer-brand img {
  filter: brightness(1.8) saturate(0);
}

.footer-brand small {
  color: #879bad;
}

.footer-main > p {
  max-width: 520px;
  margin: 0;
  color: #8599aa;
  font-size: 13px;
  line-height: 1.75;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px 28px;
}

.footer-links a {
  color: #bac7d2;
  font-size: 13px;
}

.footer-links a:hover {
  color: #fff;
}

.footer-bottom {
  margin-top: 42px;
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: #647b8e;
  font-size: 11px;
}

.mobile-actions {
  display: none;
}

.reveal {
  opacity: 1;
  transform: translateY(18px);
  transition: transform 0.7s var(--ease);
}

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

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

@media (max-width: 1120px) {
  .site-nav {
    gap: 18px;
  }

  .nav-action {
    display: none;
  }

  .hero-grid {
    gap: 40px;
  }

  .hero h1 {
    font-size: clamp(46px, 5vw, 62px);
  }

  .system-composition {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }

  .system-host {
    display: flex;
  }

  .host-product {
    min-height: 300px;
  }

  .version-row {
    grid-template-columns: 0.55fr 1.1fr 0.9fr auto;
    gap: 20px;
  }
}

@media (max-width: 860px) {
  .shell {
    width: min(100% - 32px, 720px);
  }

  .site-header {
    height: 66px;
  }

  .nav-shell {
    justify-content: space-between;
  }

  .menu-button {
    width: 42px;
    height: 42px;
    display: grid;
    align-content: center;
    gap: 5px;
    padding: 0 10px;
    border: 1px solid var(--line);
    border-radius: 10px;
    background: var(--surface);
  }

  .menu-button span {
    height: 2px;
    display: block;
    border-radius: 2px;
    background: var(--ink);
  }

  .menu-button b {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
  }

  .site-nav {
    position: absolute;
    left: 16px;
    right: 16px;
    top: 58px;
    display: none;
    margin: 0;
    padding: 12px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow);
  }

  .site-nav.is-open {
    display: grid;
  }

  .site-nav a {
    min-height: 48px;
    display: flex;
    align-items: center;
    padding: 0 12px;
    border-bottom: 1px solid var(--line);
  }

  .site-nav a:last-child {
    border-bottom: 0;
  }

  .hero {
    padding-top: 34px;
  }

  .hero-grid {
    min-height: auto;
    grid-template-columns: 1fr;
    gap: 44px;
    padding-bottom: 64px;
  }

  .hero h1 {
    max-width: 660px;
    font-size: clamp(44px, 8vw, 64px);
  }

  .hero-media {
    width: calc(100% - 24px);
    margin-left: 24px;
  }

  .hero-watch-inset {
    left: -24px;
  }

  .hero-media-note {
    right: -8px;
  }

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

  .value-strip div {
    min-height: 86px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .value-strip div:last-child {
    border-bottom: 0;
  }

  .section {
    padding: 86px 0;
  }

  .terminal-flow {
    grid-template-columns: 1fr;
    gap: 7px;
    margin-top: -18px;
    text-align: center;
  }

  .terminal-flow span {
    padding: 4px 0;
  }

  .system-composition {
    grid-template-columns: 1fr;
  }

  .system-watch {
    grid-template-columns: 1fr;
  }

  .media-frame {
    min-height: auto;
  }

  .media-frame img {
    aspect-ratio: 16 / 9;
  }

  .system-host {
    grid-template-columns: 1fr;
  }

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

  .capability-ledger article:nth-child(2) {
    border-right: 0;
  }

  .capability-ledger article:nth-child(-n + 2) {
    border-bottom: 1px solid var(--line);
  }

  .journey-track {
    overflow-x: auto;
    grid-template-columns: repeat(5, minmax(230px, 1fr));
    scroll-snap-type: x mandatory;
    padding: 14px 2px 28px;
  }

  .journey-track::before {
    display: none;
  }

  .journey-step {
    min-height: 240px;
    scroll-snap-align: start;
    border-color: #cfdae4;
    background: rgba(255, 255, 255, 0.5);
  }

  .journey-step > span {
    margin-bottom: 48px;
  }

  .scene-gallery {
    grid-template-columns: 1fr;
    grid-template-rows: 420px 300px 300px;
  }

  .scene-wide {
    grid-row: auto;
  }

  .agents-layout,
  .privacy-grid,
  .faq-layout,
  .contact-layout {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .agents-intro,
  .faq-heading {
    position: static;
  }

  .agent-detail {
    min-height: 620px;
  }

  .ecosystem-layout {
    grid-template-columns: 1fr;
  }

  .ecosystem-media {
    min-height: 390px;
  }

  .ecosystem-copy {
    padding: 42px;
  }

  .version-row {
    grid-template-columns: 0.6fr 1.4fr auto;
  }

  .version-row ul {
    display: none;
  }

  .service-gallery {
    overflow-x: auto;
    grid-template-columns: repeat(3, minmax(290px, 1fr));
    scroll-snap-type: x mandatory;
    padding-bottom: 18px;
  }

  .service-item {
    scroll-snap-align: start;
  }

  .service-item:nth-child(2) {
    margin-top: 0;
  }

  .contact-qr {
    justify-self: start;
  }

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

  .footer-main > p {
    grid-column: 1 / 3;
    grid-row: 2;
  }
}

@media (max-width: 560px) {
  .shell {
    width: calc(100% - 32px);
  }

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

  .brand strong {
    font-size: 16px;
  }

  .hero {
    padding-top: 28px;
  }

  .hero-grid {
    gap: 38px;
  }

  .eyebrow {
    margin-bottom: 17px;
    font-size: 11px;
  }

  .hero h1 {
    font-size: clamp(40px, 12vw, 54px);
    line-height: 1.1;
    letter-spacing: -0.06em;
  }

  .hero h1 span {
    white-space: normal;
  }

  .hero-lead {
    margin-top: 20px;
    font-size: 16px;
    line-height: 1.7;
  }

  .hero-actions {
    align-items: stretch;
    flex-direction: column;
    gap: 10px;
    margin-top: 28px;
  }

  .hero-actions .text-link {
    justify-content: center;
    border: 0;
  }

  .hero-media {
    width: 100%;
    margin-left: 0;
    padding-bottom: 84px;
  }

  .hero-media-primary img {
    object-position: 50% center;
  }

  .hero-media-primary {
    aspect-ratio: 1 / 1.05;
  }

  .hero-watch-inset {
    left: -6px;
    width: 56%;
    border-width: 5px;
  }

  .hero-media-note {
    right: -6px;
    bottom: 18px;
    width: 50%;
    padding: 14px;
  }

  .hero-media-note span {
    font-size: 11px;
  }

  .value-strip div {
    padding-inline: 18px;
  }

  .section {
    padding: 72px 0;
  }

  .section-heading {
    margin-bottom: 36px;
  }

  .section-heading h2,
  .privacy-copy h2,
  .ecosystem-copy h2,
  .agents-intro h2,
  .faq-heading h2,
  .contact-copy h2 {
    font-size: 36px;
    line-height: 1.18;
  }

  .section-heading p,
  .privacy-copy > p,
  .ecosystem-copy > p,
  .agents-intro > p,
  .faq-heading p,
  .contact-copy > p {
    font-size: 15px;
    line-height: 1.75;
  }

  .system-copy {
    padding: 26px;
  }

  .system-copy h3 {
    font-size: 26px;
  }

  .host-product {
    min-height: 300px;
  }

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

  .capability-ledger article {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .capability-ledger article:last-child {
    border-bottom: 0;
  }

  .scene-gallery {
    grid-template-rows: repeat(3, 300px);
  }

  .scene div {
    left: 22px;
    right: 22px;
    bottom: 20px;
  }

  .agent-tabs {
    grid-template-columns: 1fr 1fr;
  }

  .agent-detail {
    min-height: auto;
    padding: 28px;
  }

  .agent-detail h3 {
    margin-top: 34px;
    font-size: 38px;
  }

  .agent-detail-grid {
    grid-template-columns: 1fr;
  }

  .agent-visual {
    height: 220px;
  }

  .service-item img {
    height: 210px;
  }

  .privacy-principles {
    grid-template-columns: 1fr;
  }

  .privacy-principles article {
    min-height: 150px;
  }

  .ecosystem-media {
    min-height: 280px;
  }

  .ecosystem-copy {
    padding: 28px;
  }

  .version-row,
  .version-row.is-featured {
    grid-template-columns: 1fr;
    gap: 18px;
    min-height: auto;
    margin-inline: 0;
    padding: 28px 22px;
  }

  .version-row ul {
    display: block;
  }

  .version-row a {
    justify-self: start;
  }

  .service-gallery {
    grid-template-columns: repeat(3, minmax(270px, 82vw));
  }

  .contact-section {
    padding: 78px 0;
  }

  .contact-phone {
    font-size: 34px;
  }

  .contact-qr {
    width: 100%;
    grid-template-columns: 112px 1fr;
    gap: 18px;
    padding: 18px;
  }

  .contact-qr img {
    width: 112px;
    height: 112px;
  }

  .site-footer {
    padding-bottom: 116px;
  }

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

  .footer-main > p {
    grid-column: auto;
    grid-row: auto;
  }

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

  .mobile-actions {
    position: fixed;
    z-index: 90;
    left: 12px;
    right: 12px;
    bottom: 12px;
    height: 56px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.28);
    border-radius: 14px;
    background: rgba(11, 23, 40, 0.94);
    backdrop-filter: blur(16px);
    box-shadow: 0 16px 40px rgba(11, 23, 40, 0.25);
  }

  .mobile-actions a {
    display: grid;
    place-items: center;
    color: #fff;
    font-size: 14px;
    font-weight: 800;
  }

  .mobile-actions a:last-child {
    background: var(--blue);
  }
}

@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;
  }

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