:root {
  --bg: #0b1020;
  --bg-soft: #121833;
  --panel: rgba(15, 20, 42, 0.84);
  --panel-strong: #171e3d;
  --text: #f5f7ff;
  --muted: #b9c1df;
  --line: rgba(255, 255, 255, 0.12);
  --pink: #ff5ca8;
  --pink-soft: #ff8cc4;
  --violet: #7f5cff;
  --violet-soft: #b39bff;
  --orange: #ff8b4c;
  --orange-soft: #ffc18f;
  --mint: #55e0c4;
  --cream: #fff7ec;
  --shadow: 0 20px 60px rgba(0, 0, 0, 0.28);
  --radius-xl: 28px;
  --radius-lg: 22px;
  --radius-md: 16px;
  --radius-sm: 12px;
  --max: 1200px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  font-family: "Microsoft YaHei", "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", sans-serif;
  background:
    radial-gradient(circle at 18% 12%, rgba(255, 92, 168, 0.28), transparent 22%),
    radial-gradient(circle at 85% 14%, rgba(127, 92, 255, 0.25), transparent 20%),
    radial-gradient(circle at 72% 78%, rgba(85, 224, 196, 0.16), transparent 18%),
    linear-gradient(180deg, #0a0f1e 0%, #0d1226 40%, #090d18 100%);
  min-height: 100vh;
}

body.page-home {
  background:
    radial-gradient(circle at 18% 12%, rgba(255, 92, 168, 0.30), transparent 22%),
    radial-gradient(circle at 85% 14%, rgba(127, 92, 255, 0.26), transparent 20%),
    radial-gradient(circle at 72% 78%, rgba(85, 224, 196, 0.16), transparent 18%),
    linear-gradient(180deg, #0a0f1e 0%, #0d1226 40%, #090d18 100%);
}

body.page-guide {
  background:
    radial-gradient(circle at 18% 10%, rgba(255, 139, 76, 0.24), transparent 20%),
    radial-gradient(circle at 78% 12%, rgba(255, 92, 168, 0.20), transparent 18%),
    radial-gradient(circle at 72% 80%, rgba(255, 246, 221, 0.12), transparent 18%),
    linear-gradient(180deg, #0d1020 0%, #141939 42%, #0a0f18 100%);
}

body.page-faq {
  background:
    radial-gradient(circle at 16% 14%, rgba(85, 224, 196, 0.18), transparent 20%),
    radial-gradient(circle at 84% 12%, rgba(127, 92, 255, 0.24), transparent 18%),
    radial-gradient(circle at 68% 78%, rgba(255, 92, 168, 0.16), transparent 18%),
    linear-gradient(180deg, #07101d 0%, #0d1633 44%, #090d17 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.55), transparent 85%);
  opacity: 0.5;
}

body.page-guide::before {
  opacity: 0.42;
  background-size: 32px 32px;
}

body.page-faq::before {
  opacity: 0.46;
  background-size: 24px 24px;
}

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

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

button,
a.button {
  font: inherit;
}

.site-shell {
  position: relative;
  z-index: 1;
}

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

.topbar {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(18px);
  background: rgba(8, 12, 24, 0.75);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  min-height: 76px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
}

.brand-mark {
  width: 54px;
  height: 54px;
  border-radius: 18px;
  box-shadow: var(--shadow);
  flex: none;
}

.brand-text strong {
  display: block;
  font-size: 18px;
  letter-spacing: 0.5px;
}

.brand-text span {
  display: block;
  color: var(--muted);
  font-size: 12px;
  margin-top: 3px;
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.05);
  color: var(--text);
  cursor: pointer;
}

.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  display: block;
  width: 20px;
  height: 2px;
  border-radius: 999px;
  background: currentColor;
  position: relative;
}

.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  position: absolute;
  left: 0;
}

.nav-toggle span::before { top: -6px; }
.nav-toggle span::after { top: 6px; }

.nav {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
}

.nav a {
  color: var(--muted);
  font-size: 14px;
  padding: 10px 0;
  position: relative;
}

.nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 2px;
  width: 100%;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--pink), var(--violet));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.2s ease;
}

.nav a:hover,
.nav a:focus-visible {
  color: var(--text);
}

.nav a:hover::after,
.nav a:focus-visible::after {
  transform: scaleX(1);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 46px;
  padding: 0 18px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--orange), var(--pink));
  color: #fff;
  font-weight: 700;
  box-shadow: 0 14px 28px rgba(255, 92, 168, 0.25);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.nav-cta:hover,
.nav-cta:focus-visible,
.button-primary:hover,
.button-primary:focus-visible,
.button-secondary:hover,
.button-secondary:focus-visible {
  transform: translateY(-1px);
}

.nav-cta:hover,
.nav-cta:focus-visible {
  box-shadow: 0 18px 34px rgba(255, 92, 168, 0.32);
}

.hero {
  padding: 42px 0 18px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(330px, 0.92fr);
  gap: 28px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 9px 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--cream);
  font-size: 13px;
}

.eyebrow i {
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--mint), var(--pink));
  box-shadow: 0 0 0 6px rgba(85, 224, 196, 0.14);
}

h1, h2, h3, h4, p {
  margin: 0;
}

.hero h1 {
  margin-top: 18px;
  font-size: clamp(38px, 5vw, 64px);
  line-height: 1.04;
  letter-spacing: -0.03em;
}

.hero p.lead {
  margin-top: 18px;
  max-width: 48rem;
  font-size: 17px;
  line-height: 1.85;
  color: var(--muted);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 24px;
}

.button-primary,
.button-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 52px;
  padding: 0 20px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 700;
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.button-primary {
  background: linear-gradient(135deg, var(--orange), var(--pink));
  color: #fff;
  box-shadow: 0 18px 38px rgba(255, 120, 117, 0.24);
}

.button-secondary {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
  border-color: rgba(255, 255, 255, 0.1);
}

.button-secondary:hover,
.button-secondary:focus-visible {
  background: rgba(255, 255, 255, 0.09);
}

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

.stat-card {
  padding: 16px 18px;
  border-radius: 18px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.07), rgba(255, 255, 255, 0.03));
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.stat-card strong {
  display: block;
  font-size: 28px;
  line-height: 1;
  letter-spacing: -0.02em;
}

.stat-card span {
  display: block;
  margin-top: 8px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
}

.hero-visual {
  position: relative;
}

.hero-panel {
  position: relative;
  padding: 20px;
  border-radius: 32px;
  background:
    linear-gradient(160deg, rgba(255, 255, 255, 0.13), rgba(255, 255, 255, 0.04)),
    linear-gradient(180deg, rgba(15, 22, 44, 0.82), rgba(15, 22, 44, 0.68));
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.hero-panel::before,
.hero-panel::after {
  content: "";
  position: absolute;
  border-radius: 999px;
  filter: blur(8px);
  opacity: 0.72;
}

.hero-panel::before {
  width: 220px;
  height: 220px;
  top: -110px;
  right: -90px;
  background: radial-gradient(circle, rgba(255, 140, 196, 0.38), transparent 72%);
}

.hero-panel::after {
  width: 180px;
  height: 180px;
  left: -60px;
  bottom: -90px;
  background: radial-gradient(circle, rgba(127, 92, 255, 0.35), transparent 68%);
}

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

.screen-card {
  position: relative;
  min-height: 240px;
  border-radius: 24px;
  overflow: hidden;
  background: #101530;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.screen-card.tall {
  min-height: 500px;
  grid-column: span 2;
}

.screen-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.screen-caption {
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 16px;
  padding: 12px 14px;
  border-radius: 16px;
  background: rgba(8, 10, 18, 0.58);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.screen-caption strong {
  display: block;
  font-size: 15px;
}

.screen-caption span {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.5;
}

.section {
  padding: 26px 0;
}

.section-card {
  padding: 26px;
  border-radius: var(--radius-xl);
  background: var(--panel);
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: var(--shadow);
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 18px;
  margin-bottom: 20px;
}

.section-header h2 {
  font-size: clamp(24px, 3vw, 38px);
  line-height: 1.1;
}

.section-header p {
  max-width: 46rem;
  color: var(--muted);
  line-height: 1.75;
  font-size: 15px;
}

.pill-list,
.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.pill,
.tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--cream);
  font-size: 13px;
}

.pill i,
.tag i {
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--mint), var(--pink));
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.feature-card {
  padding: 20px;
  border-radius: 20px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.03));
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.feature-card .icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 14px;
  margin-bottom: 14px;
  background: linear-gradient(135deg, rgba(255, 140, 76, 0.24), rgba(255, 92, 168, 0.18));
  color: #fff;
  font-weight: 800;
}

.feature-card h3,
.mini-card h3 {
  font-size: 18px;
  line-height: 1.3;
}

.feature-card p,
.mini-card p {
  margin-top: 10px;
  color: var(--muted);
  line-height: 1.7;
  font-size: 14px;
}

.feature-card ul {
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}

.feature-card li,
.check-list li {
  position: relative;
  padding-left: 18px;
  color: var(--cream);
  font-size: 14px;
  line-height: 1.6;
}

.feature-card li::before,
.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.75em;
  width: 7px;
  height: 7px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--mint), var(--pink));
  transform: translateY(-50%);
}

.split-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: 20px;
}

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

.mini-card {
  padding: 18px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.mini-card .meta {
  display: inline-flex;
  margin-bottom: 12px;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  color: var(--pink-soft);
  font-size: 12px;
}

.module-cta {
  margin-top: 20px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.module-cta a {
  min-height: 48px;
}

.timeline,
.faq-list,
.review-grid,
.steps {
  display: grid;
  gap: 14px;
}

.timeline-item,
.faq-item,
.review-card,
.step-card {
  padding: 18px 18px 18px 20px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.timeline-item strong,
.faq-item summary,
.review-card strong,
.step-card strong {
  display: block;
  font-size: 16px;
}

.timeline-item p,
.faq-item p,
.review-card p,
.step-card p {
  margin-top: 10px;
  color: var(--muted);
  line-height: 1.75;
  font-size: 14px;
}

.timeline-item {
  display: grid;
  grid-template-columns: 110px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
}

.timeline-item time {
  color: var(--pink-soft);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.02em;
}

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

.device {
  padding: 14px;
  border-radius: 28px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.09), rgba(255, 255, 255, 0.03));
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.device figure {
  margin: 0;
}

.device img {
  width: 100%;
  border-radius: 20px;
}

.device figcaption {
  margin-top: 12px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.6;
}

.quote {
  position: relative;
  padding-top: 2px;
}

.quote::before {
  content: "“";
  display: block;
  color: var(--pink-soft);
  font-size: 42px;
  line-height: 1;
  margin-bottom: 6px;
}

.quote cite {
  display: block;
  margin-top: 12px;
  color: var(--cream);
  font-style: normal;
  font-size: 13px;
}

details.faq-item {
  cursor: pointer;
}

details.faq-item summary {
  list-style: none;
}

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

details.faq-item summary::after {
  content: "+";
  float: right;
  color: var(--pink-soft);
  font-weight: 800;
}

details[open].faq-item summary::after {
  content: "–";
}

.article {
  padding: 28px;
  border-radius: var(--radius-xl);
  background: var(--panel);
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: var(--shadow);
}

.article h1 {
  font-size: clamp(34px, 4.8vw, 56px);
  line-height: 1.08;
}

.article .article-meta {
  margin-top: 16px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  color: var(--muted);
  font-size: 13px;
}

.article .article-meta span {
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.article-content {
  margin-top: 24px;
  display: grid;
  gap: 18px;
  line-height: 1.9;
  color: var(--cream);
  font-size: 15px;
}

.article-content h2 {
  margin-top: 14px;
  font-size: 28px;
  line-height: 1.15;
}

.article-content h3 {
  margin-top: 12px;
  font-size: 20px;
}

.article-content p,
.article-content li {
  color: var(--cream);
}

.article-content ul,
.article-content ol {
  margin: 0;
  padding-left: 22px;
  display: grid;
  gap: 10px;
}

.callout {
  padding: 18px 20px;
  border-radius: 18px;
  background: linear-gradient(135deg, rgba(255, 92, 168, 0.14), rgba(127, 92, 255, 0.14));
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--cream);
}

.site-footer {
  padding: 24px 0 42px;
}

.footer-card {
  padding: 22px 24px;
  border-radius: var(--radius-xl);
  background: rgba(8, 12, 24, 0.86);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
  gap: 18px;
}

.footer-brand p {
  margin-top: 12px;
  color: var(--muted);
  line-height: 1.8;
  font-size: 14px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-content: start;
}

.footer-links a {
  padding: 10px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  color: var(--cream);
  font-size: 13px;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.copyright {
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--muted);
  font-size: 13px;
  line-height: 1.75;
}

.content-nav {
  margin-top: 18px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.content-nav a {
  color: var(--cream);
}

.small-note {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.7;
}

.download-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: space-between;
  align-items: center;
  padding: 20px 22px;
  border-radius: 24px;
  background: linear-gradient(135deg, rgba(255, 92, 168, 0.14), rgba(255, 139, 76, 0.16));
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.download-bar strong {
  display: block;
  font-size: 18px;
}

.download-bar p {
  margin-top: 6px;
  color: var(--cream);
  line-height: 1.7;
  font-size: 14px;
}

.anchor-target {
  scroll-margin-top: 102px;
}

.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;
}

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

@media (max-width: 1120px) {
  .hero-grid,
  .split-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

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

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

  .screen-card.tall {
    min-height: 380px;
  }
}

@media (max-width: 820px) {
  .topbar-inner {
    position: relative;
  }

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

  .nav {
    position: absolute;
    top: calc(100% + 10px);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px;
    border-radius: 20px;
    background: rgba(10, 14, 28, 0.98);
    border: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: var(--shadow);
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.18s ease, transform 0.18s ease;
  }

  .nav.is-open {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
  }

  .nav a {
    padding: 12px 8px;
  }

  .nav a::after {
    bottom: 6px;
  }

  .hero {
    padding-top: 26px;
  }

  .hero-stats,
  .feature-grid,
  .preview-grid,
  .mini-grid {
    grid-template-columns: 1fr;
  }

  .section-card,
  .article,
  .footer-card {
    padding: 20px;
  }

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

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

  .download-bar {
    align-items: start;
  }
}

@media (max-width: 540px) {
  .wrap {
    width: min(calc(100% - 20px), var(--max));
  }

  .brand-text strong {
    font-size: 16px;
  }

  .brand-text span {
    display: none;
  }

  .hero h1 {
    font-size: 34px;
  }

  .hero p.lead,
  .article-content {
    font-size: 14px;
  }

  .screen-stack {
    grid-template-columns: 1fr;
  }

  .screen-card.tall {
    grid-column: auto;
    min-height: 300px;
  }
}