:root {
  --ink: #111318;
  --muted: #687083;
  --line: #e7e9ee;
  --paper: #ffffff;
  --soft: #f5f6f8;
  --accent: #0071e3;
  --green: #0b8f6a;
  --red: #d04d3c;
  color-scheme: light;
  font-family: Inter, "Microsoft YaHei", "PingFang SC", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--soft);
  letter-spacing: 0;
}

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

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

p {
  line-height: 1.76;
}

.preview-bar {
  display: flex;
  justify-content: center;
  gap: 24px;
  padding: 10px 20px;
  color: #f7f8fb;
  background: #111318;
  font-size: 13px;
}

.preview-bar b {
  color: white;
}

.site-nav {
  position: sticky;
  top: 0;
  z-index: 10;
  min-height: 70px;
  padding: 0 max(24px, calc((100vw - 1180px) / 2 + 24px));
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  background: rgba(255, 255, 255, 0.82);
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
  backdrop-filter: blur(18px);
}

.nav-dark {
  background: rgba(17, 19, 24, 0.78);
  color: white;
  border-bottom-color: rgba(255, 255, 255, 0.12);
}

.mark {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
}

.mark span {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  color: white;
  background: #111318;
  font-size: 12px;
}

.nav-dark .mark span {
  background: white;
  color: #111318;
}

.site-nav nav {
  display: flex;
  gap: 28px;
  color: var(--muted);
  font-size: 14px;
}

.nav-dark nav {
  color: rgba(255, 255, 255, 0.72);
}

.nav-return {
  min-height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-size: 14px;
  font-weight: 700;
}

.nav-dark .nav-return {
  border-color: rgba(255, 255, 255, 0.22);
}

.hero,
.statement,
.market-lines,
.download-panel,
.detail-rows,
.steps,
.faq,
.trust-lines,
.time-ribbon,
.support-hero,
.support-topics,
.quote-board,
.system-bands,
.footer {
  max-width: 1180px;
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

.hero {
  min-height: 760px;
  display: grid;
  grid-template-columns: minmax(0, 0.86fr) minmax(420px, 1.14fr);
  gap: 52px;
  align-items: center;
  padding-top: 84px;
  padding-bottom: 84px;
}

.hero-center {
  max-width: 960px;
  margin: 0 auto;
  text-align: center;
}

.eyebrow {
  color: var(--accent);
  font-size: 13px;
  line-height: 1.4;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0;
}

.hero h1,
.market-hero h1,
.support-hero h1,
.guide-layout article > h1,
.index-hero h1 {
  margin-bottom: 22px;
  font-size: 76px;
  line-height: 1.04;
  font-weight: 800;
}

.hero p,
.market-hero p,
.support-hero > p,
.guide-layout article > p,
.index-hero p {
  max-width: 760px;
  color: var(--muted);
  font-size: 18px;
}

.hero-center p {
  margin-left: auto;
  margin-right: auto;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.hero-center .actions {
  justify-content: center;
}

.button {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 22px;
  border-radius: 8px;
  font-weight: 800;
}

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

.button-quiet {
  color: var(--ink);
  background: white;
  border: 1px solid var(--line);
}

.product-figure {
  margin: 0;
}

.product-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border-radius: 26px;
  box-shadow: 0 40px 120px rgba(10, 17, 32, 0.16);
}

.visual-wide {
  max-width: 980px;
  margin-left: auto;
  margin-right: auto;
}

.visual-wide img {
  aspect-ratio: 16 / 9;
}

.hero-flagship,
.hero-trust,
.market-hero {
  max-width: none;
  padding-left: max(24px, calc((100vw - 1180px) / 2 + 24px));
  padding-right: max(24px, calc((100vw - 1180px) / 2 + 24px));
  color: white;
  background: linear-gradient(180deg, #111318 0%, #1d2430 100%);
}

.hero-flagship,
.hero-browser {
  grid-template-columns: 1fr;
}

.hero-flagship .hero-center p,
.hero-trust p,
.market-hero p {
  color: rgba(255, 255, 255, 0.72);
}

.hero-flagship .button-quiet,
.hero-trust .button-quiet,
.market-hero .button-quiet {
  color: white;
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.18);
}

.hero-gallery {
  background: #fbfbfd;
}

.hero-gallery .product-figure img {
  box-shadow: 0 38px 100px rgba(78, 84, 102, 0.12);
}

.hero-browser {
  min-height: 840px;
  background: linear-gradient(180deg, #fbfbfd, #eef4f8);
}

.visual-browser-frame img {
  border-radius: 18px;
}

.hero-launch {
  background: linear-gradient(180deg, #f8fafc 0%, #eef4ff 100%);
}

.platforms {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.platforms span,
.support-topics a {
  min-height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.76);
  font-weight: 800;
}

.hero-sequence {
  background: #f7f4ef;
}

.page-support {
  background: #fbfbfd;
}

.support-hero {
  min-height: 760px;
  padding-top: 86px;
  text-align: center;
}

.support-hero > p {
  margin-left: auto;
  margin-right: auto;
}

.search-shape {
  width: min(100%, 680px);
  min-height: 58px;
  margin: 34px auto 54px;
  display: flex;
  align-items: center;
  padding: 0 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: white;
  color: var(--muted);
  text-align: left;
}

.support-topics {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
  padding-top: 26px;
  padding-bottom: 54px;
}

.market-hero {
  min-height: 780px;
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(420px, 1.1fr);
  gap: 52px;
  align-items: center;
  padding-top: 84px;
  padding-bottom: 84px;
}

.quote-board {
  padding-top: 60px;
  padding-bottom: 50px;
}

.quote-board div,
.market-lines div,
.detail-rows div,
.trust-lines div,
.time-ribbon div,
.system-bands div {
  border-top: 1px solid var(--line);
}

.quote-board div {
  min-height: 92px;
  display: grid;
  grid-template-columns: 1fr 1fr 110px;
  align-items: center;
  gap: 24px;
}

.quote-board strong {
  font-size: 34px;
}

.quote-board em,
.market-lines em {
  font-style: normal;
  font-weight: 800;
}

.up {
  color: var(--green);
}

.down {
  color: var(--red);
}

.statement {
  padding-top: 104px;
  padding-bottom: 92px;
}

.statement > p,
.detail-rows > h2,
.steps > h2,
.faq > h2 {
  color: var(--accent);
}

.statement h2 {
  max-width: 940px;
  margin-bottom: 34px;
  font-size: 58px;
  line-height: 1.08;
}

.statement-copy {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 42px;
  color: var(--muted);
  line-height: 1.85;
}

.market-lines {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  padding-top: 20px;
  padding-bottom: 70px;
}

.download-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 34px;
  align-items: center;
  padding-top: 58px;
  padding-bottom: 58px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.download-panel h2 {
  margin-bottom: 14px;
  font-size: 42px;
  line-height: 1.12;
}

.download-panel p {
  max-width: 760px;
  margin-bottom: 0;
  color: var(--muted);
}

.download-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 12px;
}

.download-actions a {
  min-height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 20px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: white;
  color: var(--ink);
  font-weight: 800;
  white-space: nowrap;
}

.download-actions a:first-child {
  border-color: var(--accent);
  background: var(--accent);
  color: white;
}

.market-lines div {
  min-height: 118px;
  padding: 22px 20px 0 0;
}

.market-lines span,
.quote-board span {
  display: block;
  color: var(--muted);
}

.market-lines strong {
  display: block;
  margin: 8px 0;
  font-size: 30px;
}

.detail-rows {
  padding-top: 80px;
  padding-bottom: 80px;
}

.detail-rows h2,
.steps h2,
.faq h2 {
  margin-bottom: 26px;
  font-size: 42px;
}

.detail-rows div {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 30px;
  padding: 26px 0;
}

.detail-rows strong {
  font-size: 24px;
}

.detail-rows p {
  max-width: 720px;
  margin-bottom: 0;
  color: var(--muted);
}

.steps {
  padding-top: 84px;
  padding-bottom: 88px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.steps ol {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 38px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.steps li {
  border-top: 1px solid var(--line);
  padding-top: 22px;
}

.steps span {
  display: block;
  color: var(--accent);
  font-weight: 900;
}

.steps strong {
  display: block;
  margin: 14px 0 8px;
  font-size: 24px;
}

.steps p {
  color: var(--muted);
}

.faq {
  padding-top: 84px;
  padding-bottom: 90px;
}

.faq details {
  border-top: 1px solid var(--line);
  padding: 22px 0;
}

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

.faq summary {
  cursor: pointer;
  font-size: 20px;
  font-weight: 800;
}

.faq p {
  max-width: 760px;
  color: var(--muted);
}

.trust-lines {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  padding-top: 70px;
  padding-bottom: 44px;
}

.trust-lines div {
  min-height: 120px;
  padding-top: 24px;
}

.trust-lines span {
  display: block;
  color: var(--accent);
  font-weight: 900;
}

.trust-lines strong {
  display: block;
  margin-top: 18px;
  font-size: 24px;
}

.time-ribbon {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 26px;
  padding-top: 72px;
  padding-bottom: 72px;
}

.time-ribbon div {
  padding-top: 24px;
}

.time-ribbon strong {
  display: block;
  font-size: 64px;
  line-height: 1;
}

.time-ribbon span {
  display: block;
  margin-top: 14px;
  color: var(--muted);
  font-weight: 800;
}

.system-bands {
  padding-top: 82px;
  padding-bottom: 80px;
}

.system-bands div {
  display: grid;
  grid-template-columns: 0.56fr 1fr;
  gap: 60px;
  padding: 34px 0;
}

.system-bands h2 {
  font-size: 42px;
}

.system-bands p {
  color: var(--muted);
  font-size: 18px;
}

.keyword-line {
  margin-top: 24px;
  color: #4f596b;
  font-size: 14px;
}

.guide-layout {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  min-height: 100vh;
}

.guide-layout aside {
  position: sticky;
  top: 0;
  align-self: start;
  height: 100vh;
  padding: 32px;
  border-right: 1px solid var(--line);
  background: white;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.guide-layout aside > a {
  color: var(--muted);
}

.guide-layout article {
  padding: 82px min(7vw, 96px);
}

.guide-layout .product-figure {
  margin: 48px 0 68px;
}

.doc-block {
  border-top: 1px solid var(--line);
  padding: 32px 0;
}

.doc-block h2 {
  font-size: 34px;
}

.doc-block p {
  max-width: 760px;
  color: var(--muted);
}

.footer {
  padding-top: 44px;
  padding-bottom: 60px;
  border-top: 1px solid var(--line);
}

.footer strong,
.footer span {
  margin-right: 12px;
}

.footer span,
.footer p {
  color: var(--muted);
}

.index-page {
  background: #fbfbfd;
}

.index-hero {
  max-width: 1180px;
  margin: 0 auto;
  padding: 108px 24px 70px;
}

.index-hero p {
  max-width: 840px;
}

.index-list {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px 90px;
}

.index-list a {
  min-height: 104px;
  display: grid;
  grid-template-columns: 70px minmax(180px, 0.6fr) 1fr;
  gap: 24px;
  align-items: center;
  border-top: 1px solid var(--line);
}

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

.index-list span {
  color: var(--muted);
  font-weight: 800;
}

.index-list strong {
  font-size: 32px;
}

.index-list em {
  color: var(--muted);
  font-style: normal;
  font-size: 20px;
}

@media (max-width: 980px) {
  .preview-bar {
    flex-direction: column;
    gap: 4px;
    text-align: center;
  }

  .site-nav {
    position: static;
    flex-wrap: wrap;
    padding-top: 16px;
    padding-bottom: 16px;
  }

  .site-nav nav {
    order: 3;
    width: 100%;
    overflow-x: auto;
    padding-bottom: 2px;
  }

  .hero,
  .market-hero {
    min-height: auto;
    grid-template-columns: 1fr;
  }

  .hero h1,
  .market-hero h1,
  .support-hero h1,
  .guide-layout article > h1,
  .index-hero h1 {
    font-size: 56px;
  }

  .statement h2 {
    font-size: 46px;
  }

  .statement-copy,
  .detail-rows div,
  .system-bands div {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .market-lines,
  .download-panel,
  .trust-lines,
  .time-ribbon {
    grid-template-columns: repeat(2, 1fr);
  }

  .download-actions {
    justify-content: flex-start;
  }

  .steps ol {
    grid-template-columns: 1fr;
  }

  .guide-layout {
    display: block;
  }

  .guide-layout aside {
    position: static;
    height: auto;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .index-list a {
    grid-template-columns: 54px 1fr;
  }

  .index-list em {
    grid-column: 2;
  }
}

@media (max-width: 640px) {
  .hero,
  .statement,
  .market-lines,
  .download-panel,
  .detail-rows,
  .steps,
  .faq,
  .trust-lines,
  .time-ribbon,
  .support-hero,
  .support-topics,
  .quote-board,
  .system-bands,
  .footer,
  .index-hero,
  .index-list,
  .guide-layout article {
    padding-left: 18px;
    padding-right: 18px;
  }

  .hero h1,
  .market-hero h1,
  .support-hero h1,
  .guide-layout article > h1,
  .index-hero h1 {
    font-size: 42px;
  }

  .hero p,
  .market-hero p,
  .support-hero > p,
  .guide-layout article > p,
  .index-hero p {
    font-size: 16px;
  }

  .statement h2,
  .download-panel h2,
  .detail-rows h2,
  .steps h2,
  .faq h2,
  .system-bands h2 {
    font-size: 32px;
  }

  .product-figure img {
    border-radius: 18px;
  }

  .market-lines,
  .download-panel,
  .trust-lines,
  .time-ribbon,
  .quote-board div {
    grid-template-columns: 1fr;
  }

  .download-actions a {
    flex: 1 1 120px;
  }

  .time-ribbon strong {
    font-size: 48px;
  }

  .index-list a {
    grid-template-columns: 1fr;
    gap: 8px;
    padding: 22px 0;
  }

  .index-list em {
    grid-column: auto;
    font-size: 17px;
  }
}