:root {
  --ink: #1a3340;
  --muted: #6b8494;
  --mist: #dfe9ef;
  --paper: #eef4f8;
  --surface: #ffffff;
  --fog: #c8d8e4;
  --slate: #243f4f;
  --slate-deep: #162b36;
  --accent: #4a90b8;
  --accent-soft: #d7ebf6;
  --line: rgba(36, 63, 79, 0.12);
  --shadow: 0 22px 60px rgba(22, 43, 54, 0.1);
  --radius: 16px;
  --max: 1160px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 12% 0%, rgba(200, 216, 228, 0.55), transparent 34%),
    radial-gradient(circle at 88% 8%, rgba(215, 235, 246, 0.65), transparent 28%),
    var(--paper);
  font-family: "Microsoft YaHei UI", "PingFang SC", "Noto Sans CJK SC", sans-serif;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
}

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

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

:focus-visible {
  outline: 3px solid rgba(74, 144, 184, 0.45);
  outline-offset: 4px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  z-index: 999;
  top: 12px;
  left: 12px;
  padding: 10px 16px;
  color: #fff;
  background: var(--slate-deep);
  border-radius: 8px;
  transform: translateY(-150%);
}

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

.shell {
  width: min(calc(100% - 40px), var(--max));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(238, 244, 248, 0.88);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}

.nav-wrap {
  width: min(calc(100% - 40px), var(--max));
  margin-inline: auto;
  min-height: 72px;
  display: flex;
  align-items: center;
  gap: 18px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 1.05rem;
  color: var(--slate-deep);
}

.brand strong {
  font-weight: 800;
  letter-spacing: 0.04em;
}

.brand small {
  margin-left: 2px;
  font-size: 0.72rem;
  color: var(--muted);
  letter-spacing: 0.12em;
}

.brand-symbol {
  width: 36px;
  height: 36px;
  fill: none;
  stroke: var(--accent);
  stroke-width: 1.8;
}

.brand-symbol path:last-child {
  stroke: var(--slate);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  margin-left: auto;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface);
  padding: 0;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 4px auto;
  background: var(--slate);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.main-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin-left: auto;
}

.main-nav a {
  font-size: 0.92rem;
  color: var(--muted);
}

.main-nav a:hover,
.main-nav a[aria-current="page"] {
  color: var(--slate-deep);
}

.nav-cta,
.button,
.download-button,
.action-link {
  white-space: nowrap;
  word-break: keep-all;
  writing-mode: horizontal-tb;
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 108px;
  padding: 10px 18px;
  border-radius: 999px;
  background: var(--slate-deep);
  color: #fff;
  font-size: 0.92rem;
  font-weight: 700;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 148px;
  padding: 13px 22px;
  border-radius: 999px;
  font-weight: 700;
}

.button.primary {
  background: var(--slate-deep);
  color: #fff;
}

.button.secondary {
  background: var(--surface);
  color: var(--slate-deep);
  border: 1px solid var(--line);
}

.button.pale {
  background: rgba(255, 255, 255, 0.14);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.28);
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--accent);
  font-weight: 700;
}

.micro-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 14px;
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
}

.micro-label span {
  width: 34px;
  height: 1px;
  background: var(--fog);
}

.hero {
  position: relative;
  overflow: hidden;
  padding: 72px 0 28px;
}

.mist-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(40px);
  pointer-events: none;
}

.mist-one {
  width: 320px;
  height: 320px;
  top: -80px;
  right: 8%;
  background: rgba(200, 216, 228, 0.75);
}

.mist-two {
  width: 260px;
  height: 260px;
  bottom: 40px;
  left: -40px;
  background: rgba(215, 235, 246, 0.8);
}

.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
  gap: 48px;
  align-items: center;
}

.hero-copy h1 {
  margin: 0 0 18px;
  font-size: clamp(2.4rem, 5vw, 4.2rem);
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: var(--slate-deep);
}

.hero-copy h1 span {
  color: var(--accent);
}

.hero-lead {
  max-width: 34rem;
  margin: 0 0 24px;
  color: var(--muted);
  font-size: 1.05rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
  margin-bottom: 22px;
}

.trust-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  padding: 0;
  margin: 0;
  list-style: none;
}

.trust-list li {
  padding: 8px 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid var(--line);
  font-size: 0.88rem;
  color: var(--slate);
}

.hero-media {
  align-self: center;
  margin: 0;
  padding: 0;
  overflow: visible;
}

.hero-media img,
.story-image img,
.agency-panel img,
.sub-visual img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: contain;
  object-position: center;
  margin: 0;
  padding: 0;
  clip-path: none;
  transform: none;
  border-radius: calc(var(--radius) + 4px);
  box-shadow: var(--shadow);
}

.hero-footnote {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  margin-top: 28px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.88rem;
}

.metrics-rail {
  padding: 34px 0 18px;
}

.metrics-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 28px;
  align-items: end;
}

.metrics-layout h2,
.section h2,
.sub-hero h1,
.help-block h2 {
  margin: 0 0 12px;
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  line-height: 1.15;
  color: var(--slate-deep);
}

.metrics-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.metrics-list article,
.capability,
.lead-news,
.news-list article,
.download-card,
.price-stack article,
.agency-facts span,
.fog-panel,
.platform-ladder article,
.install-flow article,
.verify-board article,
.help-nav a,
.help-block {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 8px 24px rgba(22, 43, 54, 0.04);
}

.metrics-list article {
  padding: 18px 16px;
}

.metrics-list strong {
  display: block;
  font-size: 1.8rem;
  line-height: 1;
  color: var(--slate-deep);
}

.metrics-list span {
  display: block;
  margin-top: 8px;
  font-size: 0.82rem;
  color: var(--muted);
}

.section {
  padding: 72px 0;
}

.feature-story {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.35), transparent);
}

.story-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.88fr) minmax(0, 1.12fr);
  gap: 34px;
}

.story-image {
  margin: 24px 0 0;
}

.capability-stack {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.capability {
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 12px;
  padding: 18px;
}

.capability.wide {
  grid-column: span 2;
}

.cap-icon {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 700;
}

.capability h3,
.news-list h3,
.download-card h3,
.price-stack h3,
.help-block h3 {
  margin: 0 0 6px;
  font-size: 1.05rem;
  color: var(--slate-deep);
}

.capability p,
.story-heading p,
.rail-intro p,
.split-heading p,
.download-intro p,
.pricing-copy p,
.agency-copy p,
.faq-title p,
.sub-hero p {
  margin: 0;
  color: var(--muted);
}

.split-heading,
.download-intro,
.pricing-copy,
.faq-title {
  margin-bottom: 28px;
}

.split-heading {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: end;
}

.news-editorial {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 18px;
}

.lead-news {
  padding: 24px;
}

.lead-news span,
.news-list span,
.download-card span {
  display: inline-block;
  margin-bottom: 10px;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
}

.lead-news h3 {
  margin: 0 0 10px;
  font-size: 1.45rem;
}

.news-list {
  display: grid;
  gap: 12px;
}

.news-list article {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px 16px;
  padding: 18px;
}

.news-list h3 {
  grid-column: 1 / -1;
  margin: 0;
  font-size: 1rem;
}

.download-section {
  background: rgba(255, 255, 255, 0.55);
}

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

.download-card {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 14px;
  padding: 20px;
  align-items: start;
}

.platform-monogram {
  display: grid;
  place-items: center;
  width: 56px;
  height: 56px;
  border-radius: 14px;
  font-weight: 800;
  color: var(--slate-deep);
  background: var(--accent-soft);
}

.card-win .platform-monogram { background: #e3eef6; }
.card-mac .platform-monogram { background: #e8edf1; }
.card-android .platform-monogram { background: #e5f3ea; }
.card-ios .platform-monogram { background: #eceff4; }

.download-button {
  grid-column: 1 / -1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 168px;
  padding: 11px 18px;
  border-radius: 999px;
  background: var(--slate-deep);
  color: #fff;
  font-weight: 700;
}

.download-more {
  margin: 22px 0 0;
  text-align: center;
}

.download-more a {
  color: var(--accent);
  font-weight: 700;
}

.pricing-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
  gap: 28px;
  align-items: start;
}

.pricing-copy ul {
  margin: 18px 0 0;
  padding-left: 18px;
  color: var(--muted);
}

.price-stack {
  display: grid;
  gap: 14px;
}

.price-stack article {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px 16px;
  align-items: center;
  padding: 20px;
}

.price-stack article.featured-price {
  border-color: rgba(74, 144, 184, 0.35);
  background: linear-gradient(180deg, #fff, #f4f9fc);
}

.price-stack em {
  display: inline-block;
  margin-bottom: 6px;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-style: normal;
  font-size: 0.75rem;
}

.price-stack strong {
  font-size: 1.8rem;
  color: var(--slate-deep);
}

.agency-panel {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
  gap: 28px;
  align-items: center;
  padding: 24px;
  border-radius: calc(var(--radius) + 6px);
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid var(--line);
}

.agency-panel figure {
  margin: 0;
}

.agency-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 18px 0 22px;
}

.agency-facts span {
  padding: 10px 14px;
  font-size: 0.88rem;
  color: var(--muted);
}

.agency-facts strong {
  display: block;
  color: var(--slate-deep);
  font-size: 1.15rem;
}

.faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.72fr) minmax(0, 1.28fr);
  gap: 28px;
}

.faq-list {
  display: grid;
  gap: 12px;
}

.faq-list details {
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.faq-list summary {
  cursor: pointer;
  font-weight: 700;
  color: var(--slate-deep);
}

.faq-list p {
  margin: 10px 0 0;
  color: var(--muted);
}

.contact-strip {
  padding: 34px 0 72px;
}

.contact-strip .shell {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 18px;
  align-items: center;
  padding: 24px 28px;
  border-radius: calc(var(--radius) + 4px);
  background: linear-gradient(135deg, var(--slate-deep), #2f5367);
  color: #fff;
}

.contact-strip span {
  display: block;
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.68);
}

.contact-strip h2 {
  margin: 8px 0 0;
  color: #fff;
}

.site-footer {
  padding: 42px 0 24px;
  background: rgba(255, 255, 255, 0.55);
  border-top: 1px solid var(--line);
}

.footer-main {
  display: grid;
  grid-template-columns: 1.2fr repeat(3, minmax(0, 1fr));
  gap: 24px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--line);
}

.footer-about p,
.footer-bottom span {
  color: var(--muted);
  font-size: 0.92rem;
}

.footer-links {
  display: grid;
  gap: 8px;
}

.footer-links strong {
  margin-bottom: 4px;
  color: var(--slate-deep);
}

.footer-links a:hover {
  color: var(--accent);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px;
  padding-top: 18px;
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

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

.sub-hero {
  padding: 56px 0 24px;
}

.sub-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 24px;
  align-items: stretch;
}

.sub-hero h1 {
  font-size: clamp(2rem, 4vw, 3.2rem);
}

.fog-panel {
  padding: 22px;
}

.fog-panel div {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
  font-size: 0.92rem;
}

.fog-panel div:last-child {
  border-bottom: 0;
}

.fog-panel span:last-child {
  color: var(--accent);
  font-weight: 700;
}

.platform-ladder {
  display: grid;
  gap: 14px;
}

.platform-ladder article {
  display: grid;
  grid-template-columns: 72px 1fr auto;
  gap: 16px;
  align-items: center;
  padding: 20px;
}

.platform-badge {
  display: grid;
  place-items: center;
  width: 72px;
  height: 72px;
  border-radius: 18px;
  background: var(--accent-soft);
  font-weight: 800;
  color: var(--slate-deep);
}

.platform-ladder .dl-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 156px;
  padding: 11px 18px;
  border-radius: 999px;
  background: var(--slate-deep);
  color: #fff;
  font-weight: 700;
}

.install-flow {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.install-flow article {
  padding: 22px;
}

.install-flow strong {
  display: block;
  margin-bottom: 8px;
  font-size: 1.4rem;
  color: var(--accent);
}

.sub-visual {
  margin: 0;
}

.sub-band {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  padding: 24px 28px;
  border-radius: calc(var(--radius) + 4px);
  background: var(--surface);
  border: 1px solid var(--line);
}

.verify-board {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.verify-board article {
  padding: 20px;
}

.help-shell {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 24px;
  align-items: start;
}

.help-nav {
  position: sticky;
  top: 92px;
  display: grid;
  gap: 8px;
  padding: 18px;
}

.help-nav strong {
  margin-bottom: 6px;
  color: var(--slate-deep);
}

.help-nav a {
  padding: 8px 10px;
  border-radius: 10px;
  color: var(--muted);
}

.help-nav a:hover {
  background: var(--accent-soft);
  color: var(--slate-deep);
}

.help-stack {
  display: grid;
  gap: 16px;
}

.help-block {
  padding: 24px;
}

.help-block ol,
.help-block ul {
  margin: 12px 0 0;
  padding-left: 20px;
  color: var(--muted);
}

.help-block li + li {
  margin-top: 8px;
}

@media (max-width: 980px) {
  .hero-grid,
  .metrics-layout,
  .story-grid,
  .news-editorial,
  .pricing-layout,
  .agency-panel,
  .faq-layout,
  .sub-hero-grid,
  .help-shell,
  .footer-main {
    grid-template-columns: minmax(0, 1fr);
  }

  .capability.wide {
    grid-column: span 1;
  }

  .capability-stack,
  .download-matrix,
  .metrics-list,
  .install-flow,
  .verify-board {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .help-nav {
    position: static;
  }
}

@media (max-width: 760px) {
  .nav-toggle {
    display: block;
  }

  .main-nav {
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    padding: 16px 20px 20px;
    background: rgba(238, 244, 248, 0.98);
    border-bottom: 1px solid var(--line);
  }

  .main-nav.open {
    display: flex;
  }

  .nav-wrap {
    position: relative;
    flex-wrap: wrap;
  }

  .nav-cta {
    order: 3;
    width: 100%;
    margin-top: 4px;
  }

  .metrics-list,
  .capability-stack,
  .download-matrix,
  .install-flow,
  .verify-board,
  .platform-ladder article {
    grid-template-columns: minmax(0, 1fr);
  }

  .platform-ladder article {
    grid-template-columns: 56px 1fr;
  }

  .platform-ladder .dl-btn {
    grid-column: 1 / -1;
    width: 100%;
  }

  .split-heading {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation: none !important;
    transition: none !important;
  }

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

.hero-grid {
  align-items: center;
}

.hero-media {
  align-self: center;
}

.hero-media img,
.story-image img,
.agency-panel img,
.sub-visual img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: contain;
  object-position: center;
}