:root {
  color-scheme: dark;
  --ink: #f4f7ff;
  --muted: #a6b0c5;
  --subtle: #77839d;
  --line: rgba(255, 255, 255, 0.11);
  --panel: #11182a;
  --panel-deep: #0a1020;
  --cyan: #63d8ff;
  --cyan-strong: #25bce9;
  --violet: #9a8bff;
  --amber: #ffca71;
  --shell: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  background: #080d19;
  color: var(--ink);
  font-family: Inter, "Microsoft YaHei", "PingFang SC", sans-serif;
  line-height: 1.6;
  letter-spacing: 0;
}

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

button {
  font: inherit;
}

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

.site-header {
  position: absolute;
  z-index: 10;
  inset: 0 0 auto;
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
  background: rgba(8, 13, 25, 0.34);
  backdrop-filter: blur(18px);
}

.nav-wrap {
  height: 78px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0;
}

.brand img {
  width: 29px;
  height: 29px;
  object-fit: contain;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 30px;
  color: #b9c2d6;
  font-size: 14px;
}

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

.main-nav a:hover {
  color: #fff;
}

.main-nav .nav-download {
  padding: 9px 16px;
  color: #07111c;
  background: #dff7ff;
  border-radius: 6px;
  font-weight: 700;
}

.main-nav .nav-purchase {
  padding: 9px 16px;
  color: #07111c;
  background: #dff7ff;
  border-radius: 6px;
  font-weight: 700;
}

.main-nav .nav-download:hover,
.main-nav .nav-purchase:hover {
  color: #07111c;
}

.menu-toggle {
  display: none;
  width: 38px;
  height: 38px;
  padding: 8px;
  border: 1px solid var(--line);
  background: transparent;
  border-radius: 6px;
  cursor: pointer;
}

.menu-toggle span {
  display: block;
  height: 2px;
  margin: 4px 0;
  background: #fff;
}

.hero {
  position: relative;
  min-height: 720px;
  overflow: hidden;
  background: #090e18;
}

.hero::after {
  position: absolute;
  content: "";
  inset: auto 0 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(99, 216, 255, 0.4), transparent);
}

.hero-grid::before {
  position: absolute;
  z-index: 1;
  content: "";
  inset: 0;
  pointer-events: none;
  background: linear-gradient(
    90deg,
    rgba(9, 14, 24, 0.99) 0%,
    rgba(9, 14, 24, 0.99) 42%,
    rgba(9, 14, 24, 0.9) 58%,
    rgba(9, 14, 24, 0.2) 100%
  );
}

.hero-grid {
  position: relative;
  z-index: 2;
  min-height: 720px;
  padding-top: 205px;
  padding-bottom: 75px;
}

.hero-copy {
  position: relative;
  z-index: 2;
  max-width: 560px;
}

.eyebrow,
.section-kicker {
  color: var(--cyan);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 8px;
  color: #a8eaff;
  text-transform: none;
  letter-spacing: 0;
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #70e3a2;
  box-shadow: 0 0 0 4px rgba(112, 227, 162, 0.11);
}

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

h1 {
  max-width: 580px;
  margin: 23px 0 22px;
  font-size: 64px;
  line-height: 1.12;
  letter-spacing: 0;
}

h1 em {
  color: var(--cyan);
  font-style: normal;
}

.hero-tagline {
  margin: -8px 0 17px;
  color: #9de8ff;
  font-size: 25px;
  font-weight: 600;
}

.hero-lead {
  max-width: 490px;
  margin-bottom: 31px;
  color: var(--muted);
  font-size: 17px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  min-height: 46px;
  padding: 0 20px;
  border: 1px solid transparent;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 700;
  transition: transform 160ms ease, background 160ms ease, border-color 160ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button-primary {
  color: #06101b;
  background: var(--cyan);
  box-shadow: 0 14px 30px rgba(45, 184, 228, 0.2);
}

.button-primary:hover {
  background: #b7efff;
}

.button-quiet {
  color: #d4dbea;
  border-color: var(--line);
}

.button-quiet:hover {
  border-color: rgba(99, 216, 255, 0.44);
}

.button-icon {
  font-size: 20px;
  line-height: 0;
}

.download-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
  color: var(--subtle);
  font-size: 12px;
}

.meta-separator {
  width: 3px;
  height: 3px;
  margin-top: 10px;
  border-radius: 50%;
  background: #58637a;
}

.product-stage {
  position: absolute;
  z-index: 0;
  top: 88px;
  right: 0;
  bottom: 28px;
  width: 100%;
  padding: 0;
  opacity: 0.94;
  pointer-events: none;
}

.stage-window {
  position: relative;
  overflow: hidden;
  height: 100%;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
  transform: none;
}

.window-bar {
  height: 43px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 17px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(17, 29, 50, 0.76);
}

.window-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  color: #eaf4ff;
  font-size: 12px;
  font-weight: 700;
}

.window-brand img {
  width: 18px;
  height: 18px;
}

.window-dots {
  display: flex;
  gap: 5px;
}

.window-dots i {
  display: block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #52617b;
}

.window-body {
  display: grid;
  grid-template-columns: 123px 1fr;
  height: calc(100% - 43px);
}

.mock-sidebar {
  padding: 18px 9px;
  border-right: 1px solid rgba(255, 255, 255, 0.08);
  background: #0a1222;
}

.mock-sidebar div {
  display: flex;
  align-items: center;
  gap: 7px;
  margin-bottom: 9px;
  padding: 9px 8px;
  border-radius: 5px;
  color: #75839d;
  font-size: 10px;
}

.mock-sidebar b {
  width: 13px;
  color: #7c8ba7;
  font-size: 12px;
  text-align: center;
}

.mock-sidebar .mock-side-active {
  color: #ccefff;
  background: rgba(72, 190, 232, 0.15);
}

.mock-sidebar .mock-side-active b {
  color: var(--cyan);
}

.mock-content {
  padding: 21px 22px;
  background: rgba(16, 27, 46, 0.88);
}

.mock-heading,
.info-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.mock-heading small {
  display: block;
  margin-bottom: 3px;
  color: #7e8ba6;
  font-size: 9px;
}

.mock-heading strong {
  color: #f1f5fc;
  font-size: 15px;
}

.mock-pill {
  padding: 4px 8px;
  border: 1px solid rgba(112, 227, 162, 0.22);
  border-radius: 4px;
  color: #88ebb1;
  background: rgba(112, 227, 162, 0.08);
  font-size: 9px;
}

.mock-preview {
  display: grid;
  grid-template-columns: 1.18fr 0.82fr;
  gap: 15px;
  margin-top: 20px;
  padding: 12px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 6px;
  background: #0c1628;
}

.preview-frame {
  position: relative;
  min-height: 173px;
  display: grid;
  place-items: center;
  overflow: hidden;
  border-radius: 5px;
  background:
    linear-gradient(135deg, rgba(22, 95, 121, 0.46), transparent 58%),
    repeating-linear-gradient(135deg, #1b2942 0, #1b2942 18px, #152039 19px, #152039 38px);
}

.preview-play {
  position: relative;
  z-index: 1;
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  padding-left: 3px;
  border: 1px solid rgba(255, 255, 255, 0.42);
  border-radius: 50%;
  color: #fff;
  font-size: 12px;
  background: rgba(7, 15, 28, 0.42);
}

.preview-caption {
  position: absolute;
  right: 10px;
  bottom: 8px;
  color: rgba(255, 255, 255, 0.72);
  font-size: 9px;
}

.preview-info {
  padding: 6px 3px;
}

.info-row {
  padding: 9px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  color: #7f8ca5;
  font-size: 10px;
}

.info-row b {
  color: #dce6f7;
  font-size: 10px;
}

.mock-progress {
  height: 4px;
  margin-top: 24px;
  overflow: hidden;
  border-radius: 99px;
  background: #1e2d46;
}

.mock-progress span {
  display: block;
  width: 72%;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--cyan), #9eabff);
}

.preview-info > small {
  display: block;
  margin-top: 8px;
  color: #8291aa;
  font-size: 9px;
}

.mock-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-top: 15px;
}

.mock-cards > div {
  min-height: 76px;
  padding: 11px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 5px;
  background: rgba(255, 255, 255, 0.025);
}

.card-icon {
  display: block;
  margin-bottom: 5px;
  font-size: 15px;
}

.card-icon.cyan { color: var(--cyan); }
.card-icon.violet { color: var(--violet); }
.card-icon.amber { color: var(--amber); }

.mock-cards p {
  margin: 0 0 2px;
  color: #d8e2f2;
  font-size: 10px;
}

.mock-cards small {
  color: #77849b;
  font-size: 8px;
}

.stage-note {
  position: absolute;
  z-index: 2;
  display: grid;
  gap: 1px;
  padding: 11px 14px;
  border: 1px solid rgba(133, 218, 249, 0.19);
  border-radius: 5px;
  background: rgba(14, 28, 48, 0.89);
  box-shadow: 0 16px 26px rgba(0, 0, 0, 0.2);
}

.stage-note strong {
  color: #e3f8ff;
  font-size: 11px;
}

.stage-note span {
  color: #8294ae;
  font-size: 10px;
}

.note-top {
  top: 1px;
  right: -15px;
}

.note-bottom {
  bottom: 4px;
  left: -17px;
  border-color: rgba(154, 139, 255, 0.24);
}

.trust-strip {
  border-bottom: 1px solid var(--line);
  background: #0d1526;
}

.trust-items {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
  padding: 22px 0;
}

.trust-items div {
  display: grid;
  gap: 2px;
  padding-left: 18px;
  border-left: 1px solid rgba(99, 216, 255, 0.32);
}

.trust-items strong {
  color: #eaf3ff;
  font-size: 13px;
}

.trust-items span {
  color: var(--subtle);
  font-size: 12px;
}

.section {
  padding: 110px 0;
  color: #17212d;
  background: #edf2f4;
}

.section-heading {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 40px;
  margin-bottom: 43px;
}

h2 {
  margin: 11px 0 0;
  font-size: 46px;
  line-height: 1.18;
  letter-spacing: 0;
}

.section-heading > p {
  max-width: 310px;
  margin-bottom: 5px;
  color: #5d6977;
  font-size: 14px;
}

.section:not(.section-guide) .section-kicker {
  color: #087b9a;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.feature-card {
  min-height: 244px;
  padding: 27px;
  border: 1px solid #d9e1e6;
  border-radius: 7px;
  background: #fff;
}

.feature-card-large {
  grid-column: span 2;
  display: grid;
  grid-template-columns: 1.12fr 0.88fr;
  gap: 28px;
  align-items: center;
}

.feature-card-dark {
  grid-column: span 3;
  min-height: 192px;
  grid-template-columns: 0.8fr 1.2fr;
  color: #fff;
  border-color: rgba(255, 255, 255, 0.08);
  background: linear-gradient(110deg, #17222d, #102733);
}

.feature-card-dark h3 {
  color: #f4f7ff;
}

.feature-card-copy {
  min-width: 0;
}

.feature-number {
  display: block;
  margin-bottom: 15px;
  color: #748092;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0;
}

.feature-card h3 {
  margin-bottom: 9px;
  color: #17212d;
  font-size: 21px;
}

.feature-card p {
  margin-bottom: 0;
  color: #5d6977;
  font-size: 13px;
}

.feature-icon {
  width: 39px;
  height: 39px;
  display: grid;
  place-items: center;
  margin-bottom: 25px;
  border-radius: 7px;
  font-size: 21px;
}

.icon-cyan {
  color: var(--cyan);
  background: rgba(99, 216, 255, 0.11);
}

.icon-violet {
  color: var(--violet);
  background: rgba(154, 139, 255, 0.12);
}

.icon-amber {
  color: var(--amber);
  background: rgba(255, 202, 113, 0.11);
}

.feature-art {
  min-height: 154px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 14px;
  padding: 18px;
  border: 1px solid rgba(17, 132, 164, 0.18);
  border-radius: 6px;
  background:
    linear-gradient(90deg, rgba(99, 216, 255, 0.05) 1px, transparent 1px),
    linear-gradient(rgba(99, 216, 255, 0.05) 1px, transparent 1px),
    #0c1424;
  background-size: 20px 20px;
}

.timeline-label {
  color: #a3b6cc;
  font-size: 10px;
}

.timeline-track {
  display: flex;
  gap: 7px;
  align-items: center;
  height: 30px;
}

.timeline-track i {
  display: block;
  width: 20%;
  height: 100%;
  border-radius: 3px;
  background: linear-gradient(135deg, rgba(99, 216, 255, 0.76), rgba(99, 216, 255, 0.18));
}

.timeline-track i:nth-child(2n) {
  background: linear-gradient(135deg, rgba(154, 139, 255, 0.78), rgba(154, 139, 255, 0.16));
}

.timeline-track.thin {
  height: 9px;
}

.timeline-track.thin i {
  background: rgba(99, 216, 255, 0.35);
}

.speed-art {
  position: relative;
  min-height: 115px;
  overflow: hidden;
  border: 1px solid rgba(99, 216, 255, 0.13);
  border-radius: 6px;
  background: #0a1423;
}

.speed-line {
  position: absolute;
  width: 125%;
  height: 1px;
  left: 0;
  background: linear-gradient(90deg, transparent, rgba(99, 216, 255, 0.65), transparent);
  transform: rotate(-16deg);
}

.speed-line:nth-child(1) { top: 30px; }
.speed-line:nth-child(2) { top: 58px; width: 90%; opacity: 0.5; }
.speed-line:nth-child(3) { top: 89px; width: 110%; opacity: 0.35; }

.speed-art strong {
  position: absolute;
  right: 20px;
  bottom: 12px;
  color: rgba(223, 247, 255, 0.9);
  font-size: 19px;
  line-height: 0.94;
  text-align: right;
  letter-spacing: 0;
}

.speed-art em {
  color: var(--cyan);
  font-size: 12px;
  font-style: normal;
}

.section-guide {
  color: #f4f7ff;
  background: #111925;
}

.guide-grid,
.faq-grid {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 90px;
}

.guide-intro p,
.faq-intro {
  color: #5d6977;
  max-width: 310px;
  margin: 24px 0 28px;
  color: var(--muted);
  font-size: 15px;
}

.text-link {
  color: var(--cyan);
  font-size: 14px;
  font-weight: 700;
}

.text-link span {
  margin-left: 6px;
  font-size: 18px;
}

.steps {
  display: grid;
  gap: 0;
}

.step {
  display: grid;
  grid-template-columns: 60px 1fr;
  gap: 22px;
  padding: 0 0 27px;
  margin-bottom: 27px;
  border-bottom: 1px solid var(--line);
}

.step:last-child {
  padding-bottom: 0;
  margin-bottom: 0;
  border-bottom: 0;
}

.step-index {
  color: var(--cyan);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0;
}

.step h3 {
  margin-bottom: 7px;
  color: #eff4ff;
  font-size: 18px;
}

.step p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 13px;
}

.faq-section {
  background: #f5f7f8;
}

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

details {
  border-bottom: 1px solid #d9e1e6;
}

summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 19px 0;
  color: #17212d;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  list-style: none;
}

summary::-webkit-details-marker {
  display: none;
}

summary span {
  color: #1388a4;
  font-size: 22px;
  font-weight: 400;
  transition: transform 160ms ease;
}

details[open] summary span {
  transform: rotate(45deg);
}

details p {
  max-width: 620px;
  margin: -3px 0 19px;
  color: #5d6977;
  font-size: 13px;
}

.download-band {
  background: linear-gradient(100deg, #12637c, #153d75 54%, #342e7a);
}

.download-band-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  padding: 67px 0;
}

.download-band h2 {
  max-width: 640px;
  margin-top: 10px;
  font-size: 40px;
}

.download-band p {
  margin: 14px 0 0;
  color: rgba(235, 250, 255, 0.72);
  font-size: 13px;
}

.button-light {
  min-width: 151px;
  color: #0b2535;
  background: #e9fbff;
}

.button-light:hover {
  background: #fff;
}

.site-footer {
  background: #080d18;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
  min-height: 88px;
  color: #748198;
  font-size: 12px;
}

.footer-brand {
  color: #d9e6f8;
  font-size: 14px;
}

.footer-brand img {
  width: 23px;
  height: 23px;
}

@media (max-width: 960px) {
  h1 {
    font-size: 56px;
  }

  h2 {
    font-size: 42px;
  }

  .hero-grid {
    padding-top: 190px;
  }

  .hero-copy {
    max-width: 530px;
  }

  .product-stage {
    width: 74%;
  }

  .feature-card-large {
    grid-column: span 3;
  }

  .guide-grid,
  .faq-grid {
    gap: 50px;
  }
}

@media (max-width: 700px) {
  .shell {
    width: min(var(--shell), calc(100% - 32px));
  }

  .nav-wrap {
    height: 68px;
  }

  .main-nav {
    position: absolute;
    top: 67px;
    right: 16px;
    left: 16px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 9px;
    border: 1px solid var(--line);
    border-radius: 7px;
    background: #0d1729;
    box-shadow: 0 18px 30px rgba(0, 0, 0, 0.28);
  }

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

  .main-nav a {
    padding: 12px;
  }

  .main-nav .nav-download {
    margin-top: 5px;
    text-align: center;
  }

  .menu-toggle {
    display: block;
  }

  .hero {
    min-height: 0;
  }

  .hero-grid {
    min-height: 730px;
    padding-top: 132px;
    padding-bottom: 62px;
  }

  h1 {
    font-size: 49px;
  }

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

  h2 {
    font-size: 34px;
  }

  .hero-lead {
    font-size: 15px;
  }

  .download-meta {
    gap: 7px;
    font-size: 11px;
  }

  .product-stage {
    top: 365px;
    right: -18%;
    bottom: 12px;
    width: 112%;
    opacity: 0.52;
  }

  .stage-window {
    transform: none;
  }

  .stage-note {
    display: none;
  }

  .window-body {
    grid-template-columns: 82px 1fr;
  }

  .mock-sidebar div {
    justify-content: center;
    padding: 9px 3px;
    font-size: 0;
  }

  .mock-sidebar b {
    font-size: 13px;
  }

  .mock-content {
    padding: 15px 12px;
  }

  .mock-heading strong {
    font-size: 12px;
  }

  .mock-preview {
    grid-template-columns: 1fr;
  }

  .preview-frame {
    min-height: 130px;
  }

  .mock-cards {
    display: none;
  }

  .trust-items {
    grid-template-columns: repeat(2, 1fr);
    gap: 19px 12px;
  }

  .trust-items div {
    padding-left: 11px;
  }

  .section {
    padding: 78px 0;
  }

  .download-band h2 {
    font-size: 30px;
  }

  .section-heading,
  .download-band-inner,
  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
  }

  .section-heading {
    gap: 16px;
  }

  .section-heading > p {
    margin-bottom: 0;
  }

  .feature-grid {
    display: grid;
    grid-template-columns: 1fr;
  }

  .feature-card,
  .feature-card-large,
  .feature-card-dark {
    grid-column: auto;
    min-height: 0;
  }

  .feature-card-large,
  .feature-card-dark {
    grid-template-columns: 1fr;
  }

  .feature-card-dark {
    gap: 20px;
  }

  .guide-grid,
  .faq-grid {
    grid-template-columns: 1fr;
    gap: 45px;
  }

  .download-band-inner {
    gap: 25px;
    padding: 55px 0;
  }

  .footer-inner {
    justify-content: center;
    padding: 24px 0;
  }
}