:root {
  --bg: #140d28;
  --bg-2: #26103e;
  --panel: rgba(255, 248, 240, 0.08);
  --panel-strong: rgba(255, 248, 240, 0.12);
  --text: #fff6ee;
  --muted: rgba(255, 246, 238, 0.72);
  --line: rgba(255, 255, 255, 0.12);
  --pink: #ff7db8;
  --rose: #ff4f93;
  --orange: #ffb15c;
  --blue: #7fb0ff;
  --mint: #8df0d0;
  --shadow: 0 18px 50px rgba(5, 2, 12, 0.42);
  --radius-xl: 28px;
  --radius-lg: 22px;
  --radius-md: 16px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Trebuchet MS", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(255, 125, 184, 0.22), transparent 32%),
    radial-gradient(circle at top right, rgba(127, 176, 255, 0.18), transparent 30%),
    radial-gradient(circle at bottom left, rgba(255, 177, 92, 0.14), transparent 24%),
    linear-gradient(180deg, #120a24 0%, #1a1034 46%, #100916 100%);
  min-height: 100vh;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 32px 32px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.9), transparent 92%);
  opacity: 0.18;
}

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

img {
  display: block;
  max-width: 100%;
}

.page-shell {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 20px 0 48px;
}

.site-header {
  position: sticky;
  top: 16px;
  z-index: 12;
  display: flex;
  align-items: center;
  gap: 16px;
  justify-content: space-between;
  padding: 14px 18px;
  margin-bottom: 18px;
  background: rgba(18, 10, 36, 0.72);
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand-logo,
.footer-logo {
  width: 44px;
  height: 44px;
  border-radius: 14px;
  object-fit: cover;
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.35);
}

.brand-name {
  font-size: 1.05rem;
  letter-spacing: 0.06em;
  font-weight: 800;
}

.primary-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.primary-nav a,
.menu-toggle {
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 10px 14px;
  font-size: 0.96rem;
  line-height: 1;
  background: transparent;
  color: var(--muted);
  transition: 0.2s ease;
}

.primary-nav a:hover,
.primary-nav a.is-active,
.menu-toggle:hover {
  color: var(--text);
  border-color: rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.06);
}

.menu-toggle {
  display: none;
  color: var(--text);
}

main {
  display: grid;
  gap: 22px;
}

.section-card {
  background: linear-gradient(180deg, rgba(255, 248, 240, 0.1), rgba(255, 248, 240, 0.06));
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow);
}

.hero,
.article-hero {
  padding: 28px;
  position: relative;
  overflow: hidden;
}

.hero::after,
.article-hero::after,
.section-card::after {
  content: "";
  position: absolute;
  inset: auto -60px -120px auto;
  width: 240px;
  height: 240px;
  background: radial-gradient(circle, rgba(255, 125, 184, 0.18), transparent 70%);
  pointer-events: none;
}

.hero {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 24px;
}

.eyebrow,
.section-kicker {
  margin: 0 0 10px;
  color: var(--orange);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.78rem;
}

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

h1 {
  font-size: clamp(2.2rem, 4vw, 4.4rem);
  line-height: 1.05;
  margin-bottom: 14px;
}

h2 {
  font-size: clamp(1.4rem, 2.2vw, 2.2rem);
  margin-bottom: 12px;
}

h3 {
  font-size: 1.06rem;
  margin-bottom: 8px;
}

.lead {
  color: var(--muted);
  font-size: 1.04rem;
  line-height: 1.8;
  max-width: 62ch;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 22px 0 18px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 20px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.btn-primary {
  background: linear-gradient(135deg, var(--pink), var(--orange));
  color: #1b0d21;
  box-shadow: 0 16px 30px rgba(255, 125, 184, 0.26);
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.15);
}

.trust-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.trust-chip,
.hero-stats > div,
.feature-card,
.feature-callout,
.faq-grid > div,
.quote-list blockquote,
.timeline-item,
.check-list li,
.preview-card,
.faq-grid div,
.feature-stack,
.qa-list details {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
}

.trust-chip {
  padding: 14px 16px;
}

.trust-chip strong,
.hero-stats strong {
  display: block;
  margin-bottom: 4px;
}

.trust-chip span,
.hero-stats span,
.copyright,
.disclaimer,
.preview-card figcaption,
.quote-list blockquote,
.faq-grid p,
.feature-callout p,
.timeline-item p,
.check-list li,
.qa-list p {
  color: var(--muted);
}

.hero-panel {
  padding: 18px;
  border-radius: var(--radius-xl);
  background:
    linear-gradient(145deg, rgba(255, 125, 184, 0.18), rgba(127, 176, 255, 0.12)),
    rgba(0, 0, 0, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  color: var(--orange);
  font-size: 0.88rem;
  margin-bottom: 16px;
}

.hero-stats {
  display: grid;
  gap: 12px;
  margin-bottom: 16px;
}

.hero-stats > div {
  padding: 14px 16px;
}

.hero-stats span {
  font-size: 0.82rem;
}

.mini-screens {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr 0.7fr;
  gap: 12px;
  align-items: end;
}

.mini-screen {
  height: 220px;
  border-radius: 24px;
  border: 1px solid rgba(255, 255, 255, 0.15);
  box-shadow: 0 18px 36px rgba(0, 0, 0, 0.24);
  background-size: cover;
  background-position: center;
  position: relative;
  overflow: hidden;
}

.mini-screen::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 0%, rgba(12, 6, 20, 0.4) 100%);
}

.screen-a {
  background-image:
    linear-gradient(160deg, rgba(255, 125, 184, 0.82), rgba(255, 177, 92, 0.72)),
    linear-gradient(135deg, #2a123f 0%, #47316f 100%);
}

.screen-b {
  margin-bottom: 18px;
  background-image:
    linear-gradient(160deg, rgba(127, 176, 255, 0.78), rgba(141, 240, 208, 0.66)),
    linear-gradient(135deg, #1c2847 0%, #3e5aa0 100%);
}

.screen-c {
  background-image:
    linear-gradient(160deg, rgba(255, 255, 255, 0.18), rgba(255, 125, 184, 0.46)),
    linear-gradient(135deg, #371b57 0%, #6d2f64 100%);
}

.section-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.feature-card,
.feature-callout,
.faq-grid > div,
.timeline-item,
.check-list li,
.preview-card,
.qa-list details {
  padding: 20px;
}

.section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 18px;
}

.text-link {
  color: var(--mint);
  white-space: nowrap;
}

.text-link:hover {
  text-decoration: underline;
}

.preview-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.preview-card {
  margin: 0;
}

.preview-card img {
  width: 100%;
  max-width: 400px;
  height: auto;
  margin: 0 auto 14px;
  border-radius: 18px;
  box-shadow: 0 14px 24px rgba(0, 0, 0, 0.25);
}

.preview-card figcaption {
  font-size: 0.94rem;
  text-align: center;
}

.split-layout,
.article-layout {
  display: grid;
  gap: 18px;
}

.split-layout {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.compact {
  margin-bottom: 0;
}

.step-list,
.check-list {
  margin: 0;
  padding-left: 20px;
}

.step-list li,
.check-list li {
  margin-bottom: 12px;
  line-height: 1.8;
}

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

.quote-list blockquote {
  margin: 0;
  padding: 18px 20px;
  border-left: 4px solid var(--pink);
  line-height: 1.8;
}

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

.faq-grid > div {
  padding: 18px;
}

.article-layout {
  gap: 18px;
}

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

.timeline-item {
  display: grid;
  grid-template-columns: 66px 1fr;
  gap: 16px;
  align-items: start;
}

.timeline-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: 18px;
  background: linear-gradient(135deg, var(--pink), var(--blue));
  color: #1a0c28;
  font-weight: 800;
}

.feature-stack {
  display: grid;
  gap: 12px;
  padding: 18px;
}

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

.qa-list details {
  overflow: hidden;
}

.qa-list summary {
  cursor: pointer;
  padding: 18px 18px;
  font-weight: 700;
  list-style: none;
}

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

.qa-list p {
  margin: 0;
  padding: 0 18px 18px;
  line-height: 1.8;
}

.site-footer {
  margin-top: 18px;
  padding: 20px 22px;
  border-radius: var(--radius-xl);
  background: rgba(10, 7, 18, 0.7);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  display: grid;
  gap: 10px;
}

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

.copyright,
.disclaimer {
  margin: 0;
  line-height: 1.8;
}

.article-hero {
  display: grid;
  gap: 12px;
}

[data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1024px) {
  .hero,
  .section-grid,
  .split-layout,
  .preview-grid,
  .faq-grid {
    grid-template-columns: 1fr 1fr;
  }

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

  .section-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 760px) {
  .page-shell {
    width: min(100% - 20px, 100%);
    padding-top: 12px;
  }

  .site-header {
    flex-wrap: wrap;
    top: 8px;
  }

  .menu-toggle {
    display: inline-flex;
  }

  .primary-nav {
    display: none;
    width: 100%;
    padding-top: 8px;
  }

  body.nav-open .primary-nav {
    display: flex;
    flex-direction: column;
    align-items: stretch;
  }

  .hero,
  .section-card,
  .site-footer {
    border-radius: 22px;
  }

  .hero,
  .section-grid,
  .split-layout,
  .preview-grid,
  .faq-grid {
    grid-template-columns: 1fr;
  }

  .trust-row {
    grid-template-columns: 1fr;
  }

  .section-head {
    align-items: start;
    flex-direction: column;
  }

  .mini-screens {
    grid-template-columns: 1fr;
  }

  .mini-screen {
    height: 180px;
    margin-bottom: 0;
  }

  .timeline-item {
    grid-template-columns: 1fr;
  }

  .timeline-index {
    width: 48px;
    height: 48px;
  }
}