:root {
  color-scheme: dark;
  --bg: #111416;
  --bg-soft: #181c20;
  --panel: #20252b;
  --panel-strong: #272d34;
  --line: rgba(255, 255, 255, 0.1);
  --text: #f5f7fa;
  --muted: rgba(245, 247, 250, 0.68);
  --soft: rgba(245, 247, 250, 0.46);
  --brand: #41d7ff;
  --accent: #a7f05f;
  --ok: #74efb2;
  --warn: #ffd37a;
  --danger: #ff9a9a;
  --shadow: 0 26px 70px rgba(0, 0, 0, 0.34);
  --radius: 14px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  color: var(--text);
  background: linear-gradient(180deg, #15191d 0%, #111416 52%, #15191d 100%);
  line-height: 1.7;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background: linear-gradient(90deg, rgba(65, 215, 255, 0.07), transparent 30%, rgba(167, 240, 95, 0.05));
  opacity: 0.55;
  pointer-events: none;
}

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

p {
  margin: 0;
}

.container {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid var(--line);
  background: rgba(17, 20, 22, 0.88);
  backdrop-filter: blur(18px);
}

.nav {
  min-height: 70px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 900;
}

.logo {
  width: 42px;
  height: 42px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  color: #06101e;
  overflow: hidden;
  background: #716bf4;
  box-shadow: 0 14px 34px rgba(65, 215, 255, 0.18);
}

.logo img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
  color: var(--muted);
  font-size: 14px;
}

.nav-links a:hover {
  color: var(--text);
}

.nav-cta {
  min-height: 38px;
  padding: 0 16px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  color: #06101e;
  background: var(--brand);
  font-weight: 800;
}

.hero {
  padding: 82px 0 72px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 44px;
  align-items: center;
}

.eyebrow,
.status-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 30px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--brand);
  background: rgba(65, 215, 255, 0.08);
  font-size: 13px;
  font-weight: 800;
}

.eyebrow::before,
.status-label::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 999px;
  background: currentColor;
  box-shadow: 0 0 12px currentColor;
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.18;
}

h1 {
  margin-top: 18px;
  font-size: clamp(40px, 6vw, 72px);
  letter-spacing: 0;
}

.hero-sub {
  max-width: 720px;
  margin-top: 20px;
  color: var(--muted);
  font-size: 18px;
}

.hero-actions,
.button-row {
  margin-top: 28px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.btn {
  min-height: 46px;
  padding: 0 18px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.075);
  color: var(--text);
  font-weight: 800;
}

.btn.primary {
  color: #06101e;
  border-color: var(--brand);
  background: var(--brand);
}

.btn.disabled {
  color: var(--soft);
  cursor: not-allowed;
  background: rgba(255, 255, 255, 0.05);
}

.app-preview {
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 26px;
  background: #20252b;
  box-shadow: var(--shadow);
}

.app-preview img {
  display: block;
  width: 100%;
  border-radius: 18px;
  border: 1px solid rgba(255, 255, 255, 0.12);
}

section {
  padding: 72px 0;
}

.section-head {
  max-width: 780px;
  margin-bottom: 26px;
}

.section-head h2 {
  margin-top: 12px;
  font-size: clamp(28px, 4vw, 44px);
}

.section-head p {
  margin-top: 12px;
  color: var(--muted);
}

.story-stack {
  display: grid;
  gap: 24px;
}

.story-block {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.95fr);
  gap: 28px;
  align-items: center;
  min-height: 360px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 28px;
  background: #1b2025;
  box-shadow: var(--shadow);
}

.story-block.reverse {
  grid-template-columns: minmax(320px, 0.95fr) minmax(0, 1.05fr);
}

.story-block.reverse .story-copy {
  order: 2;
}

.story-block.reverse .story-media {
  order: 1;
}

.story-copy h3 {
  margin-bottom: 12px;
  font-size: clamp(26px, 3.2vw, 42px);
}

.story-copy p {
  color: var(--muted);
  font-size: 16px;
}

.story-points {
  margin-top: 18px;
  display: grid;
  gap: 10px;
}

.story-points span {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--muted);
}

.story-points span::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex: 0 0 auto;
  background: var(--brand);
  box-shadow: 0 0 14px rgba(65, 215, 255, 0.55);
}

.story-media {
  min-width: 0;
}

.story-media img {
  display: block;
  width: 100%;
  border-radius: 24px;
}

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

.visual-card {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: #20252b;
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.2);
}

.visual-card img {
  display: block;
  width: 100%;
  aspect-ratio: 1.38;
  object-fit: cover;
}

.visual-card-body {
  padding: 18px;
}

.visual-card-body h3 {
  margin-bottom: 8px;
  font-size: 18px;
}

.visual-card-body p {
  color: var(--muted);
}

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

.card,
.panel,
.doc-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.2);
}

.card {
  padding: 22px;
}

.card h3 {
  margin-bottom: 10px;
  font-size: 19px;
}

.card p,
.card li {
  color: var(--muted);
}

.card ul {
  margin: 12px 0 0;
  padding-left: 20px;
}

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

.compliance-item {
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #20252b;
}

.compliance-item strong {
  display: block;
  margin-bottom: 6px;
}

.compliance-item span {
  color: var(--muted);
}

.download-panel {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 24px;
  align-items: center;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: linear-gradient(135deg, #20252b, #242a31);
  box-shadow: var(--shadow);
}

.release-box {
  padding: 20px;
  border-radius: 18px;
  background: #15191d;
  border: 1px solid var(--line);
}

.release-box strong {
  display: block;
  margin-bottom: 8px;
}

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

.info-table {
  width: 100%;
  border-collapse: collapse;
  overflow: hidden;
  border-radius: var(--radius);
}

.info-table th,
.info-table td {
  padding: 15px 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  text-align: left;
  vertical-align: top;
}

.info-table th {
  width: 190px;
  color: var(--text);
  background: rgba(255, 255, 255, 0.055);
}

.info-table td {
  color: var(--muted);
}

.placeholder {
  color: var(--warn);
}

.footer {
  padding: 58px 0 42px;
  background: #171a1d;
}

.footer-top {
  display: flex;
  justify-content: space-between;
  gap: 32px;
  align-items: flex-start;
}

.footer-primary-links {
  display: flex;
  flex-wrap: wrap;
  gap: 30px;
}

.footer-primary-links a {
  color: var(--text);
  font-size: 20px;
  font-weight: 800;
}

.footer-primary-links a:hover,
.footer-meta a:hover {
  color: var(--brand);
}

.footer-socials {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 18px;
}

.social-chip {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  color: var(--text);
  background: #3a3e43;
  font-size: 22px;
  font-weight: 900;
  transition: transform 0.2s ease, background 0.2s ease;
}

.social-chip:hover {
  transform: translateY(-2px);
  background: #454a50;
}

.footer-meta {
  margin-top: 34px;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr 0.9fr;
  column-gap: 44px;
  row-gap: 14px;
  color: rgba(245, 247, 250, 0.5);
  font-size: 16px;
  line-height: 1.85;
}

.footer-meta p {
  color: inherit;
}

.footer-meta a {
  color: rgba(245, 247, 250, 0.58);
}

.page-hero {
  padding: 68px 0 34px;
}

.page-hero h1 {
  max-width: 900px;
  font-size: clamp(34px, 5vw, 56px);
}

.page-hero p {
  max-width: 820px;
  margin-top: 16px;
  color: var(--muted);
}

.doc-layout {
  display: grid;
  grid-template-columns: 250px 1fr;
  gap: 22px;
  align-items: start;
}

.toc {
  position: sticky;
  top: 94px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(8, 16, 31, 0.72);
}

.toc strong {
  display: block;
  margin-bottom: 10px;
}

.toc a {
  display: block;
  padding: 7px 0;
  color: var(--muted);
  font-size: 14px;
}

.doc-card {
  padding: 30px;
}

.doc-card h2 {
  margin-top: 34px;
  margin-bottom: 12px;
  font-size: 26px;
}

.doc-card h2:first-child {
  margin-top: 0;
}

.doc-card h3 {
  margin-top: 20px;
  margin-bottom: 8px;
}

.doc-card p,
.doc-card li {
  color: var(--muted);
}

.doc-card ul,
.doc-card ol {
  margin: 10px 0 0;
  padding-left: 22px;
}

.notice {
  margin: 18px 0;
  padding: 16px;
  border: 1px solid rgba(255, 211, 122, 0.38);
  border-radius: 14px;
  color: var(--muted);
  background: rgba(255, 211, 122, 0.08);
}

.notice strong {
  color: var(--warn);
}

@media (max-width: 900px) {
  .hero-grid,
  .download-panel,
  .doc-layout,
  .story-block,
  .story-block.reverse {
    grid-template-columns: 1fr;
  }

  .story-block.reverse .story-copy,
  .story-block.reverse .story-media {
    order: initial;
  }

  .visual-card-grid {
    grid-template-columns: 1fr;
  }

  .footer-top {
    flex-direction: column;
  }

  .footer-socials {
    justify-content: flex-start;
  }

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

  .toc {
    position: static;
  }

  .cards,
  .compliance-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 680px) {
  .container {
    width: min(100% - 28px, 1120px);
  }

  .nav {
    align-items: flex-start;
    flex-direction: column;
    padding: 14px 0;
  }

  .nav-links {
    width: 100%;
    overflow-x: auto;
    gap: 16px;
    padding-bottom: 4px;
  }

  .hero {
    padding: 54px 0 48px;
  }

  section {
    padding: 54px 0;
  }

  .hero-actions,
  .button-row {
    flex-direction: column;
  }

  .story-block {
    padding: 18px;
    border-radius: 22px;
  }

  .story-copy h3 {
    font-size: 24px;
  }

  .btn {
    width: 100%;
  }

  .info-table th,
  .info-table td {
    display: block;
    width: 100%;
  }

  .footer-primary-links {
    gap: 18px 22px;
  }

  .footer-primary-links a {
    font-size: 17px;
  }

  .social-chip {
    width: 56px;
    height: 56px;
    font-size: 17px;
  }
}