:root {
  --ink: #142033;
  --text: #223047;
  --muted: #64748b;
  --soft: #f4f7fb;
  --paper: #ffffff;
  --line: #dce5f0;
  --blue: #2463eb;
  --cyan: #0f95b0;
  --green: #14855f;
  --amber: #b56a14;
  --violet: #7357c6;
  --shadow: 0 24px 70px rgba(24, 39, 62, 0.14);
}

* {
  box-sizing: border-box;
}

html,
body {
  overflow-x: clip;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  background: var(--paper);
  font-family:
    Inter, "Segoe UI", "Microsoft YaHei", "PingFang SC", system-ui, sans-serif;
  line-height: 1.65;
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 72px;
  padding: 0 5vw;
  background: rgba(255, 255, 255, 0.9);
  border-bottom: 1px solid rgba(220, 229, 240, 0.86);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
}

.brand-logo {
  width: auto;
  height: 38px;
  max-width: 220px;
  object-fit: contain;
}

.site-nav {
  display: flex;
  gap: 24px;
  color: var(--muted);
  font-size: 14px;
  white-space: nowrap;
}

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

.hero {
  display: grid;
  grid-template-columns: minmax(330px, 0.74fr) minmax(560px, 1.26fr);
  gap: 48px;
  align-items: center;
  min-height: calc(100vh - 72px);
  padding: 58px 5vw 46px;
  background:
    linear-gradient(180deg, #f8fbff 0%, #ffffff 74%),
    radial-gradient(circle at top left, rgba(20, 133, 95, 0.12), transparent 34%);
}

.brand-hero {
  display: grid;
  justify-items: center;
  min-height: calc(100vh - 72px);
  padding: 88px 5vw 72px;
  text-align: center;
  background:
    radial-gradient(circle at 50% 14%, rgba(36, 99, 235, 0.14), transparent 30%),
    linear-gradient(180deg, #f8fbff 0%, #ffffff 84%);
}

.hero-emblem {
  position: relative;
  display: grid;
  width: 170px;
  height: 170px;
  margin-bottom: 26px;
  place-items: center;
}

.hero-logo-mark {
  width: 116px;
  height: 116px;
  object-fit: contain;
  filter: drop-shadow(0 24px 38px rgba(36, 99, 235, 0.25));
}

.orbit {
  position: absolute;
  inset: 0;
  border: 1px solid rgba(36, 99, 235, 0.18);
  border-radius: 50%;
}

.orbit-a {
  transform: rotate(24deg) scaleX(0.78);
}

.orbit-b {
  transform: rotate(-28deg) scaleY(0.78);
}

.brand-hero h1 {
  max-width: 940px;
  margin: 0;
  color: var(--ink);
  font-size: clamp(44px, 7vw, 82px);
  font-weight: 860;
  line-height: 1.04;
  overflow-wrap: anywhere;
}

.brand-hero .lead {
  margin-left: auto;
  margin-right: auto;
}

.advantage-section,
.support-links {
  padding: 92px 5vw;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 36px;
}

.section-heading.centered {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.section-heading h2 {
  margin: 0;
  color: var(--ink);
  font-size: clamp(30px, 4vw, 48px);
  font-weight: 840;
  line-height: 1.12;
}

.section-heading p:not(.section-kicker) {
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 18px;
}

.advantage-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.advantage-grid article {
  display: grid;
  justify-items: center;
  min-height: 300px;
  padding: 34px 28px;
  text-align: center;
  background: white;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 18px 45px rgba(24, 39, 62, 0.07);
}

.line-icon {
  position: relative;
  display: block;
  width: 68px;
  height: 68px;
  margin-bottom: 22px;
  border: 2px solid currentColor;
  border-radius: 20px;
}

.line-icon::before,
.line-icon::after {
  position: absolute;
  content: "";
  background: currentColor;
  border-radius: 999px;
}

.line-icon.intuitive {
  color: var(--cyan);
}

.line-icon.intuitive::before {
  width: 34px;
  height: 2px;
  left: 15px;
  top: 24px;
}

.line-icon.intuitive::after {
  width: 22px;
  height: 2px;
  left: 15px;
  top: 40px;
}

.line-icon.flexible {
  color: var(--green);
}

.line-icon.flexible::before {
  width: 2px;
  height: 38px;
  left: 23px;
  top: 14px;
}

.line-icon.flexible::after {
  width: 2px;
  height: 38px;
  right: 23px;
  top: 14px;
}

.line-icon.powerful {
  color: var(--violet);
}

.line-icon.powerful::before {
  width: 36px;
  height: 36px;
  left: 14px;
  top: 14px;
  background: transparent;
  border: 2px solid currentColor;
  border-radius: 50%;
}

.line-icon.powerful::after {
  width: 22px;
  height: 2px;
  right: 8px;
  bottom: 12px;
  transform: rotate(45deg);
}

.advantage-grid h3 {
  margin: 0 0 10px;
  color: var(--ink);
  font-size: 25px;
}

.advantage-grid p {
  margin: 0;
  color: var(--muted);
}

.module-section {
  padding: 92px 5vw;
  background: #f7f9fc;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.module-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.module-list article {
  padding: 26px;
  background: white;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.module-list strong {
  display: block;
  margin-bottom: 10px;
  color: var(--blue);
  font-size: 13px;
  letter-spacing: 0;
  text-transform: uppercase;
}

.module-list h3 {
  margin: 0 0 10px;
  font-size: 24px;
}

.module-list p {
  margin: 0;
  color: var(--muted);
}

.simple-band {
  padding: 92px 5vw;
  color: white;
  background: var(--ink);
}

.simple-band div {
  max-width: 920px;
  margin: 0 auto;
  text-align: center;
}

.simple-band h2 {
  margin: 0;
  color: white;
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.14;
}

.simple-band p:not(.section-kicker) {
  margin: 18px 0 0;
  color: rgba(255, 255, 255, 0.76);
  font-size: 18px;
}

.support-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  max-width: 880px;
  margin: 0 auto;
}

.support-grid a {
  padding: 26px;
  background: white;
  border: 1px solid var(--line);
  border-radius: 8px;
}

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

.support-grid strong {
  color: var(--ink);
  font-size: 22px;
}

.support-grid span {
  margin-top: 8px;
  color: var(--muted);
}

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

.eyebrow,
.section-kicker,
.tag {
  margin: 0 0 12px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  color: var(--ink);
  overflow-wrap: anywhere;
}

.hero h1,
.page-hero h1 {
  margin: 0;
  font-size: clamp(42px, 6vw, 76px);
  font-weight: 850;
  line-height: 1.08;
}

.lead {
  max-width: 690px;
  margin: 24px 0 0;
  color: var(--muted);
  font-size: 19px;
}

.hero-actions,
.download-actions,
.support-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.hero-actions {
  margin-top: 34px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 18px;
  color: var(--ink);
  background: white;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-weight: 780;
}

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

.button.secondary {
  background: white;
}

.button.disabled {
  color: #dbeafe;
  cursor: default;
  background: #7296f2;
  border-color: #7296f2;
}

.availability {
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.hero-media,
.screen-shot,
.doc-image {
  overflow: hidden;
  background: #edf3f9;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.hero-media {
  margin: 0;
  aspect-ratio: 16 / 10;
}

.hero-media img,
.screen-shot img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: left top;
}

.trust-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  margin: 0 5vw;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  transform: translateY(-18px);
  background: var(--line);
  box-shadow: 0 16px 40px rgba(24, 39, 62, 0.08);
}

.trust-strip div {
  padding: 20px;
  background: white;
}

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

.trust-strip strong {
  color: var(--ink);
  font-size: 17px;
}

.trust-strip span {
  margin-top: 4px;
  color: var(--muted);
  font-size: 14px;
}

.section {
  display: grid;
  grid-template-columns: minmax(280px, 0.85fr) minmax(320px, 1.15fr);
  gap: 54px;
  align-items: start;
  padding: 78px 5vw 34px;
}

.section h2,
.tour-heading h2,
.start-flow h2,
.download-section h2,
.support-band h2 {
  margin: 0;
  font-size: clamp(30px, 4vw, 48px);
  font-weight: 840;
  line-height: 1.12;
}

.section p:not(.section-kicker),
.download-section p,
.support-band p,
.pain-list p {
  margin: 0;
  color: var(--muted);
  font-size: 18px;
}

.pain-list ul {
  display: grid;
  gap: 10px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.pain-list li {
  padding: 14px 16px;
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.audience {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  padding: 26px 5vw 76px;
}

.audience article,
.feature-grid article,
.download-card,
.quick-cards a,
.faq-category {
  background: white;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.audience article {
  padding: 26px;
  min-height: 210px;
}

.audience h3,
.feature-grid h3,
.tour-copy h3,
.download-card h3,
.doc-content h3 {
  margin: 0 0 10px;
  font-size: 22px;
  line-height: 1.24;
}

.audience p,
.feature-grid p,
.tour-copy p,
.download-card p {
  margin: 0;
  color: var(--muted);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  padding: 28px 5vw 86px;
}

.feature-grid article {
  min-height: 250px;
  padding: 24px;
  background: var(--soft);
}

.feature-icon {
  display: block;
  width: 38px;
  height: 38px;
  margin-bottom: 18px;
  background: var(--blue);
  border-radius: 8px;
  box-shadow: inset 0 0 0 10px rgba(255, 255, 255, 0.2);
}

.feature-icon.signal {
  background: var(--cyan);
}

.feature-icon.canvas {
  background: var(--green);
}

.feature-icon.protocol {
  background: var(--amber);
}

.feature-icon.tuning {
  background: var(--violet);
}

.product-tour {
  padding: 92px 5vw;
  background: #f7f9fc;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.tour-heading {
  max-width: 780px;
  margin-bottom: 42px;
}

.tour-item {
  display: grid;
  grid-template-columns: minmax(280px, 0.54fr) minmax(520px, 1.46fr);
  gap: 32px;
  align-items: center;
  margin-top: 18px;
  padding: 24px;
  background: white;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.tour-item.reverse {
  grid-template-columns: minmax(520px, 1.46fr) minmax(280px, 0.54fr);
}

.tour-item.reverse .tour-copy {
  order: 2;
}

.tour-copy {
  max-width: 520px;
}

.tag {
  margin-bottom: 8px;
  color: var(--green);
}

.tag.blue {
  color: var(--blue);
}

.tag.violet {
  color: var(--violet);
}

.screen-shot {
  aspect-ratio: 16 / 9.5;
  box-shadow: 0 16px 45px rgba(24, 39, 62, 0.1);
}

.start-flow {
  display: grid;
  grid-template-columns: minmax(280px, 0.68fr) minmax(420px, 1.32fr);
  gap: 52px;
  padding: 92px 5vw;
}

.steps {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: step;
}

.steps li {
  display: grid;
  grid-template-columns: 44px 1fr;
  column-gap: 16px;
  align-items: start;
  padding: 18px;
  background: white;
  border: 1px solid var(--line);
  border-radius: 8px;
  counter-increment: step;
}

.steps li::before {
  display: grid;
  width: 44px;
  height: 44px;
  place-items: center;
  color: white;
  content: counter(step);
  background: var(--ink);
  border-radius: 8px;
  font-weight: 820;
}

.steps strong {
  font-size: 18px;
}

.steps span {
  grid-column: 2;
  color: var(--muted);
}

.download-section {
  display: grid;
  grid-template-columns: minmax(320px, 0.82fr) minmax(420px, 1.18fr);
  gap: 48px;
  align-items: center;
  padding: 98px 5vw;
  background: linear-gradient(180deg, #ffffff 0%, #f8fbff 100%);
}

.download-copy {
  max-width: 640px;
}

.download-card {
  padding: 28px;
  box-shadow: var(--shadow);
}

.download-card-head {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
}

.platform-badge,
.version-badge {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 0 10px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 760;
}

.platform-badge {
  color: white;
  background: var(--blue);
}

.version-badge {
  color: #284260;
  background: #edf6ff;
  border: 1px solid #cfe3fb;
}

.release-notes {
  display: grid;
  gap: 8px;
  margin: 22px 0 0;
  padding-left: 20px;
  color: var(--muted);
}

.support-band {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  padding: 58px 5vw;
  color: white;
  background: var(--ink);
}

.support-band h2,
.support-band p {
  color: white;
}

.support-band p {
  margin-top: 10px;
  opacity: 0.78;
}

.page-hero {
  padding: 86px 5vw 64px;
  background: linear-gradient(180deg, #f8fbff 0%, #ffffff 100%);
  border-bottom: 1px solid var(--line);
}

.page-hero h1 {
  max-width: 980px;
}

.docs-hero .lead,
.faq-hero .lead {
  max-width: 780px;
}

.quick-cards {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  padding: 28px 5vw 0;
}

.quick-cards a {
  padding: 18px;
}

.quick-cards strong,
.quick-cards span {
  display: block;
}

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

.quick-cards span {
  margin-top: 4px;
  color: var(--muted);
  font-size: 14px;
}

.doc-layout {
  display: grid;
  grid-template-columns: 250px minmax(0, 1fr);
  gap: 52px;
  max-width: 1180px;
  margin: 0 auto;
  padding: 56px 5vw 96px;
}

.hero > *,
.section > *,
.tour-item > *,
.start-flow > *,
.download-section > *,
.doc-layout > *,
.quick-cards > *,
.audience > *,
.feature-grid > *,
.trust-strip > * {
  min-width: 0;
}

.doc-nav {
  position: sticky;
  top: 96px;
  display: grid;
  align-self: start;
  gap: 8px;
  padding: 16px;
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.doc-nav a {
  padding: 9px 10px;
  color: var(--muted);
  border-radius: 6px;
  font-size: 14px;
}

.doc-nav a:hover {
  color: var(--ink);
  background: white;
}

.doc-content {
  display: grid;
  gap: 34px;
}

.doc-content section {
  padding-bottom: 34px;
  border-bottom: 1px solid var(--line);
}

.doc-content h2 {
  margin: 0 0 14px;
  color: var(--ink);
  font-size: clamp(26px, 3vw, 36px);
  line-height: 1.18;
}

.doc-content p,
.doc-content li {
  color: var(--muted);
  font-size: 17px;
}

.doc-content p {
  margin: 0 0 14px;
}

.doc-content ol,
.doc-content ul {
  display: grid;
  gap: 8px;
  margin: 0;
  padding-left: 22px;
}

.doc-two-col {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin: 22px 0;
}

.doc-two-col div,
.note {
  padding: 16px;
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.note {
  color: #284260;
  background: #edf6ff;
  border-color: #cfe3fb;
}

.doc-image {
  margin-top: 20px;
  box-shadow: 0 16px 45px rgba(24, 39, 62, 0.1);
}

.faq-layout {
  display: grid;
  gap: 22px;
  max-width: 1040px;
  margin: 0 auto;
  padding: 56px 5vw 96px;
}

.faq-category {
  padding: 24px;
}

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

.faq-category details:first-of-type {
  border-top: 0;
}

.faq-category summary {
  cursor: pointer;
  padding: 18px 0;
  color: var(--ink);
  font-size: 18px;
  font-weight: 780;
}

.faq-category p {
  margin: 0;
  padding: 0 0 18px;
  color: var(--muted);
  font-size: 17px;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 28px 5vw;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

@media (max-width: 1120px) {
  .hero,
  .section,
  .tour-item,
  .tour-item.reverse,
  .start-flow,
  .download-section,
  .doc-layout {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .tour-item.reverse .tour-copy {
    order: 0;
  }

  .feature-grid,
  .trust-strip,
  .quick-cards,
  .advantage-grid,
  .module-list,
  .support-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 760px) {
  .site-header {
    position: static;
    align-items: flex-start;
    flex-direction: column;
    padding: 18px 20px;
  }

  .site-nav {
    width: 100%;
    gap: 14px;
    overflow-x: auto;
  }

  .hero,
  .brand-hero,
  .section,
  .audience,
  .feature-grid,
  .product-tour,
  .advantage-section,
  .module-section,
  .simple-band,
  .support-links,
  .start-flow,
  .download-section,
  .support-band,
  .page-hero,
  .quick-cards,
  .doc-layout,
  .faq-layout,
  .site-footer {
    padding-left: 20px;
    padding-right: 20px;
  }

  .hero {
    padding-top: 42px;
  }

  .hero h1,
  .page-hero h1 {
    font-size: 42px;
  }

  .lead {
    font-size: 17px;
  }

  .trust-strip,
  .audience,
  .feature-grid,
  .quick-cards,
  .doc-two-col,
  .advantage-grid,
  .module-list,
  .support-grid {
    grid-template-columns: 1fr;
  }

  .trust-strip {
    margin-left: 20px;
    margin-right: 20px;
  }

  .hero-media,
  .screen-shot {
    aspect-ratio: 4 / 3;
  }

  .tour-item,
  .download-card,
  .faq-category {
    padding: 18px;
  }

  .support-band,
  .site-footer {
    align-items: flex-start;
    flex-direction: column;
  }

  .doc-nav {
    position: static;
  }

  .doc-content,
  .doc-image,
  .quick-cards a {
    min-width: 0;
    overflow: hidden;
  }

  .doc-content h2,
  .doc-content h3,
  .doc-content p,
  .doc-content li,
  .quick-cards strong,
  .quick-cards span {
    overflow-wrap: anywhere;
  }
}