@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

:root {
  --bg: #07111f;
  --bg-soft: #0d1b2d;
  --panel: rgba(11, 26, 46, 0.82);
  --panel-strong: #10233d;
  --line: rgba(255, 255, 255, 0.1);
  --text: #ecf4ff;
  --muted: #adc2dd;
  --brand: #4c8dff;
  --brand-2: #7dc7ff;
  --brand-3: #7df0c0;
  --warning: #ffd166;
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.32);
  --radius-lg: 28px;
  --radius-md: 18px;
  --radius-sm: 12px;
  --max: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(76, 141, 255, 0.24), transparent 28%),
    radial-gradient(circle at top right, rgba(125, 240, 192, 0.16), transparent 22%),
    linear-gradient(180deg, #07111f 0%, #0a1730 56%, #08101d 100%);
  line-height: 1.7;
}

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

img,
svg {
  display: block;
}

button {
  font: inherit;
}

.container {
  width: min(calc(100% - 32px), var(--max));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(18px);
  background: rgba(7, 17, 31, 0.82);
  border-bottom: 1px solid var(--line);
}

.nav-wrap {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.brand-mark {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: linear-gradient(145deg, rgba(255,255,255,0.18), rgba(255,255,255,0.06));
  padding: 6px;
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.08);
}

.brand-text small {
  display: block;
  color: var(--muted);
  font-size: 12px;
  font-weight: 500;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.nav-links a {
  padding: 10px 16px;
  border-radius: 999px;
  color: var(--muted);
  border: 1px solid transparent;
  transition: 0.25s ease;
}

.nav-links a:hover,
.nav-links a.active {
  color: #ffffff;
  border-color: rgba(125, 199, 255, 0.35);
  background: linear-gradient(135deg, rgba(76, 141, 255, 0.24), rgba(125, 199, 255, 0.12));
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.05);
}

main {
  overflow: hidden;
}

.hero {
  padding: 58px 0 26px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 28px;
  align-items: stretch;
}

.hero-copy,
.hero-card,
.surface,
.review-card,
.platform-card,
.download-focus,
.article-block,
.compare-table,
.faq details,
.timeline-card,
.info-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.hero-copy {
  padding: 36px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 999px;
  background: rgba(125, 199, 255, 0.12);
  color: #d8ebff;
  font-size: 14px;
  margin-bottom: 20px;
}

.hero h1,
.page-hero h1 {
  margin: 0;
  font-size: clamp(34px, 5vw, 58px);
  line-height: 1.08;
  letter-spacing: -0.03em;
}

.hero p.lead,
.page-hero p.lead {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 18px;
}

.hero-actions,
.cta-row,
.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.primary-btn,
.secondary-btn,
.download-btn,
.text-link-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 50px;
  padding: 0 22px;
  border-radius: 999px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.22s ease, box-shadow 0.22s ease, border-color 0.22s ease;
}

.primary-btn,
.download-btn {
  color: #031224;
  background: linear-gradient(135deg, #8bd2ff, #7df0c0);
  box-shadow: 0 18px 38px rgba(125, 240, 192, 0.18);
}

.secondary-btn,
.text-link-btn {
  color: #ffffff;
  border-color: rgba(255,255,255,0.14);
  background: rgba(255,255,255,0.04);
}

.primary-btn:hover,
.secondary-btn:hover,
.download-btn:hover,
.text-link-btn:hover {
  transform: translateY(-2px);
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 28px;
}

.stat {
  padding: 16px;
  border-radius: var(--radius-md);
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.06);
}

.stat strong {
  display: block;
  font-size: 26px;
  margin-bottom: 4px;
}

.hero-card {
  padding: 30px;
  position: relative;
  overflow: hidden;
}

.hero-orbit {
  display: grid;
  grid-template-columns: minmax(150px, 1fr) 260px minmax(150px, 1fr);
  grid-template-rows: auto auto auto;
  align-items: center;
  gap: 20px;
  min-height: 520px;
}

.ring {
  width: 260px;
  height: 260px;
  margin: 0;
  border-radius: 50%;
  background: linear-gradient(145deg, rgba(255,255,255,0.18), rgba(255,255,255,0.06));
  padding: 6px;
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.08);
  display: grid;
  place-items: center;
  position: relative;
  grid-column: 2;
  grid-row: 1 / span 2;
  justify-self: center;
  align-self: center;
}

.ring::before,
.ring::after {
  content: none;
}

.chrome-core {
  width: 100%;
  height: 100%;
  filter: none;
}

.float-card {
  position: relative;
  padding: 14px 16px;
  min-width: 0;
  width: 100%;
  max-width: none;
  border-radius: 18px;
  background: rgba(9, 21, 37, 0.86);
  border: 1px solid rgba(255,255,255,0.1);
}

.float-card strong {
  display: block;
  margin-bottom: 4px;
}

.float-card small {
  color: var(--muted);
}

.float-a {
  grid-column: 1;
  grid-row: 1;
  align-self: start;
}

.float-b {
  grid-column: 3;
  grid-row: 2;
  align-self: center;
}

.float-c {
  grid-column: 1;
  grid-row: 3;
  align-self: end;
}

section {
  padding: 24px 0 18px;
}

.section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 20px;
}

.section-head h2 {
  margin: 0;
  font-size: clamp(26px, 3.4vw, 38px);
}

.section-head p {
  margin: 0;
  max-width: 720px;
  color: var(--muted);
}

.grid-3,
.grid-4,
.review-grid,
.platform-grid,
.info-grid,
.article-grid,
.timeline-grid {
  display: grid;
  gap: 18px;
}

.grid-3,
.review-grid,
.platform-grid,
.article-grid,
.timeline-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid-4,
.info-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.surface,
.review-card,
.platform-card,
.timeline-card,
.info-card,
.article-block {
  padding: 24px;
}

.surface h3,
.review-card h3,
.platform-card h3,
.download-focus h2,
.article-block h3,
.timeline-card h3,
.info-card h3 {
  margin: 0 0 12px;
  font-size: 22px;
}

.surface p,
.review-card p,
.platform-card p,
.article-block p,
.timeline-card p,
.info-card p,
.download-focus p,
.compare-table p,
.faq p,
li {
  color: var(--muted);
}

.icon-badge {
  width: 52px;
  height: 52px;
  display: inline-grid;
  place-items: center;
  margin-bottom: 16px;
  border-radius: 16px;
  background: linear-gradient(135deg, rgba(76,141,255,0.24), rgba(125,199,255,0.1));
  border: 1px solid rgba(255,255,255,0.08);
}

.platform-grid {
  align-items: stretch;
}

.platform-card ul,
.download-checklist,
.article-block ul,
.timeline-card ul,
.surface ul {
  padding-left: 18px;
  margin: 14px 0 0;
}

.platform-card .download-btn,
.download-focus .download-btn {
  margin-top: 18px;
  width: 100%;
}

.split-section {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 18px;
}

.download-focus {
  padding: 30px;
}

.mini-panel {
  display: grid;
  gap: 12px;
  margin-top: 18px;
}

.mini-item {
  padding: 14px 16px;
  border-radius: 16px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.07);
}

.review-card .author,
.platform-meta,
.meta-row {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #dceaff;
  margin-top: 16px;
}

.avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, rgba(76,141,255,0.28), rgba(125,240,192,0.22));
  border: 1px solid rgba(255,255,255,0.08);
  font-weight: 700;
}

.faq {
  display: grid;
  gap: 14px;
}

.faq details {
  padding: 18px 22px;
}

.faq summary {
  cursor: pointer;
  font-weight: 700;
  list-style: none;
}

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

.faq details p {
  margin: 12px 0 0;
}

.page-hero {
  padding: 56px 0 22px;
}

.page-hero-card {
  padding: 34px;
  border-radius: var(--radius-lg);
  background:
    radial-gradient(circle at top right, rgba(125, 240, 192, 0.18), transparent 25%),
    linear-gradient(180deg, rgba(8, 18, 33, 0.92), rgba(11, 26, 46, 0.82));
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.compare-table {
  overflow: hidden;
}

.compare-table table {
  width: 100%;
  border-collapse: collapse;
}

.compare-table th,
.compare-table td {
  padding: 16px 18px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  text-align: left;
}

.compare-table th {
  color: #dff1ff;
  background: rgba(255,255,255,0.03);
}

.highlight-chip,
.note-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 999px;
  font-size: 13px;
  color: #eef7ff;
}

.highlight-chip {
  background: rgba(76,141,255,0.18);
}

.note-chip {
  background: rgba(255,209,102,0.14);
}

.article-grid {
  align-items: start;
}

.article-block h3 + p {
  margin-top: 0;
}

.cta-banner {
  padding: 28px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, rgba(76,141,255,0.2), rgba(125,240,192,0.12));
  border: 1px solid rgba(255,255,255,0.12);
  box-shadow: var(--shadow);
}

.cta-banner h2,
.cta-banner p {
  margin-top: 0;
}

.site-footer {
  padding: 34px 0 40px;
}

.footer-box {
  padding: 22px 24px;
  border-radius: 22px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
}

.footer-box p {
  margin: 0;
  color: #d8ebff;
}

.footer-box p + p {
  margin-top: 10px;
  color: var(--muted);
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.tag {
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,0.08);
  color: #d7e8fb;
  background: rgba(255,255,255,0.04);
}

.kicker {
  display: flex;
  align-items: center;
  gap: 8px;
  color: #d8ebff;
  margin-bottom: 12px;
}

@media (max-width: 1080px) {
  .hero-grid,
  .split-section,
  .grid-3,
  .grid-4,
  .review-grid,
  .platform-grid,
  .info-grid,
  .article-grid,
  .timeline-grid {
    grid-template-columns: 1fr 1fr;
  }

  .hero-card {
    min-height: 460px;
  }
}

@media (max-width: 760px) {
  .nav-wrap {
    min-height: auto;
    padding: 14px 0;
    flex-direction: column;
    align-items: flex-start;
  }

  .hero,
  .page-hero {
    padding-top: 32px;
  }

  .hero-grid,
  .split-section,
  .grid-3,
  .grid-4,
  .review-grid,
  .platform-grid,
  .info-grid,
  .article-grid,
  .timeline-grid,
  .hero-stats {
    grid-template-columns: 1fr;
  }

  .hero-copy,
  .hero-card,
  .download-focus,
  .page-hero-card,
  .surface,
  .review-card,
  .platform-card,
  .article-block,
  .timeline-card,
  .info-card {
    padding: 22px;
  }

  .ring {
    width: 42px;
    height: 42px;
    grid-column: auto;
    grid-row: auto;
  }

  .float-card {
    width: 100%;
  }

  .hero-orbit {
    grid-template-columns: 1fr;
    grid-template-rows: auto;
    min-height: auto;
  }

  .float-a,
  .float-b,
  .float-c {
    grid-column: auto;
    grid-row: auto;
    align-self: auto;
  }
}