:root {
  --bg: #f8fcff;
  --bg-soft: #edf8ff;
  --surface: rgba(255, 255, 255, 0.84);
  --surface-strong: #ffffff;
  --line: rgba(14, 165, 233, 0.16);
  --line-strong: rgba(2, 132, 199, 0.28);
  --text: #0f172a;
  --muted: #475569;
  --muted-soft: #64748b;
  --brand: #0ea5e9;
  --brand-deep: #0284c7;
  --brand-soft: #38bdf8;
  --accent: #06b6d4;
  --shadow: 0 24px 60px rgba(2, 132, 199, 0.14);
  --radius-lg: 28px;
  --radius-md: 20px;
  --radius-sm: 14px;
  --container: 1160px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(56, 189, 248, 0.20), transparent 30%),
    radial-gradient(circle at 85% 10%, rgba(14, 165, 233, 0.14), transparent 22%),
    linear-gradient(180deg, #f0f9ff 0%, #f8fcff 44%, #ffffff 100%);
}

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

code {
  padding: 0.15rem 0.4rem;
  border-radius: 999px;
  background: rgba(14, 165, 233, 0.1);
  color: var(--brand-deep);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.92em;
}

.page-shell {
  min-height: 100vh;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(18px);
  background: rgba(255, 255, 255, 0.78);
  border-bottom: 1px solid rgba(148, 163, 184, 0.14);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 76px;
  gap: 24px;
}

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

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 14px;
  color: #fff;
  font-weight: 800;
  letter-spacing: 0.04em;
  background: linear-gradient(135deg, var(--brand-deep), var(--brand), var(--accent));
  box-shadow: 0 16px 34px rgba(14, 165, 233, 0.28);
}

.brand-copy {
  display: flex;
  flex-direction: column;
  line-height: 1.05;
}

.brand-copy strong {
  font-size: 1rem;
}

.brand-copy span {
  margin-top: 4px;
  color: var(--muted-soft);
  font-size: 0.8rem;
}

.menu {
  display: flex;
  align-items: center;
  gap: 28px;
  color: var(--muted);
  font-size: 0.95rem;
}

.menu a:hover,
.site-footer a:hover {
  color: var(--brand-deep);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 0 22px;
  border-radius: 999px;
  border: 1px solid transparent;
  background: linear-gradient(135deg, var(--brand-deep), var(--brand), var(--accent));
  color: #fff;
  font-weight: 700;
  box-shadow: 0 18px 32px rgba(14, 165, 233, 0.24);
  transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
}

.button:hover {
  transform: translateY(-2px);
  box-shadow: 0 22px 38px rgba(14, 165, 233, 0.32);
}

.button-small {
  min-height: 42px;
  padding: 0 18px;
  font-size: 0.92rem;
}

.button-ghost {
  background: rgba(255, 255, 255, 0.72);
  color: var(--brand-deep);
  border-color: rgba(14, 165, 233, 0.2);
  box-shadow: none;
}

.hero {
  position: relative;
  overflow: hidden;
  padding: 78px 0 40px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(320px, 0.78fr);
  gap: 34px;
  align-items: center;
}

.hero-copy,
.hero-card,
.feature-card,
.scenario-card,
.keyword-box,
.faq-item,
.cta-banner,
.trust-grid > div {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--surface);
  backdrop-filter: blur(14px);
}

.hero-copy {
  padding: 14px 0;
  border: 0;
  background: transparent;
  backdrop-filter: none;
}

.eyebrow,
.section-kicker,
.card-topline {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 0.55rem 0.9rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.75);
  border: 1px solid rgba(14, 165, 233, 0.16);
  color: var(--brand-deep);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.hero h1,
.section h2,
.cta-banner h2 {
  margin: 18px 0 0;
  line-height: 1.03;
  letter-spacing: -0.04em;
}

.hero h1 {
  font-size: clamp(2.8rem, 6vw, 5.6rem);
  max-width: 11ch;
}

.hero-lead,
.section-heading p,
.feature-card p,
.scenario-card p,
.seo-copy p,
.faq-item p,
.cta-banner p {
  color: var(--muted);
  line-height: 1.8;
}

.hero-lead {
  max-width: 60ch;
  margin: 22px 0 0;
  font-size: 1.08rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 32px;
}

.price-strip {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  align-items: center;
  margin-top: 24px;
  padding: 14px 18px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid rgba(14, 165, 233, 0.16);
  box-shadow: 0 18px 36px rgba(2, 132, 199, 0.08);
}

.price-strip strong {
  color: var(--brand-deep);
  font-size: 1.45rem;
  line-height: 1;
}

.price-strip span {
  color: var(--muted);
  font-size: 0.98rem;
}

.hero-points {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  margin-top: 24px;
  color: var(--muted-soft);
  font-size: 0.94rem;
}

.hero-points span::before {
  content: "";
  display: inline-block;
  width: 8px;
  height: 8px;
  margin-right: 10px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--brand));
}

.hero-card {
  padding: 28px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.hero-card::after,
.feature-card::after,
.scenario-card::after,
.keyword-box::after,
.faq-item::after,
.cta-banner::after,
.trust-grid > div::after {
  content: "";
  position: absolute;
  inset: auto -10% -30% auto;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(56, 189, 248, 0.18), transparent 68%);
  pointer-events: none;
}

.report-list {
  display: grid;
  gap: 14px;
  margin-top: 18px;
}

.report-item {
  padding: 18px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid rgba(148, 163, 184, 0.12);
}

.report-item strong,
.feature-card h3,
.scenario-card h3,
.faq-item h3 {
  display: block;
  margin-bottom: 6px;
  font-size: 1.05rem;
}

.report-item span,
.card-metric span {
  color: var(--muted-soft);
  font-size: 0.95rem;
}

.card-metric {
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid rgba(148, 163, 184, 0.16);
}

.card-metric strong {
  display: block;
  margin-top: 8px;
  font-size: 1rem;
}

.card-metric-hot strong {
  color: var(--brand-deep);
  line-height: 1.7;
}

.hero-glow {
  position: absolute;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  filter: blur(30px);
  opacity: 0.72;
  pointer-events: none;
}

.hero-glow-left {
  left: -120px;
  top: -60px;
  background: radial-gradient(circle, rgba(125, 211, 252, 0.44), transparent 66%);
}

.hero-glow-right {
  right: -140px;
  top: 20px;
  background: radial-gradient(circle, rgba(14, 165, 233, 0.2), transparent 68%);
}

.trust-strip {
  padding: 12px 0 10px;
}

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

.trust-grid > div,
.feature-card,
.scenario-card,
.keyword-box,
.faq-item {
  padding: 24px;
  border-radius: var(--radius-md);
}

.trust-grid strong {
  display: block;
  margin-bottom: 8px;
}

.trust-grid span {
  color: var(--muted);
  line-height: 1.7;
}

.section {
  padding: 92px 0;
}

.section-alt {
  background: linear-gradient(180deg, rgba(240, 249, 255, 0.72), rgba(255, 255, 255, 0.94));
}

.section-heading {
  max-width: 760px;
  margin-bottom: 32px;
}

.section h2,
.cta-banner h2 {
  font-size: clamp(2rem, 4vw, 3.5rem);
}

.section-heading p {
  margin-top: 16px;
}

.feature-grid,
.scenario-grid {
  display: grid;
  gap: 18px;
}

.feature-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.scenario-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.seo-panel {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(280px, 0.85fr);
  gap: 20px;
  align-items: start;
}

.keyword-box {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-content: start;
}

.keyword-chip {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 16px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid rgba(14, 165, 233, 0.18);
  color: var(--brand-deep);
  font-weight: 700;
}

.cta-section {
  padding-top: 10px;
}

.cta-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 34px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.faq-list {
  display: grid;
  gap: 16px;
}

.site-footer {
  padding: 22px 0 44px;
}

.footer-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  color: var(--muted-soft);
  font-size: 0.94rem;
}

@media (max-width: 960px) {
  .menu {
    display: none;
  }

  .hero {
    padding-top: 46px;
  }

  .hero-grid,
  .seo-panel,
  .feature-grid,
  .scenario-grid,
  .trust-grid,
  .cta-banner {
    grid-template-columns: 1fr;
  }

  .cta-banner {
    display: grid;
  }

  .hero h1 {
    max-width: 12ch;
  }
}

@media (max-width: 640px) {
  .container {
    width: min(calc(100% - 28px), var(--container));
  }

  .nav {
    min-height: 68px;
  }

  .brand-copy span {
    display: none;
  }

  .button-small {
    padding: 0 14px;
  }

  .hero {
    padding: 30px 0 16px;
  }

  .hero-card,
  .trust-grid > div,
  .feature-card,
  .scenario-card,
  .keyword-box,
  .faq-item,
  .cta-banner {
    padding: 20px;
  }

  .section {
    padding: 70px 0;
  }

  .footer-row {
    flex-direction: column;
    align-items: flex-start;
  }
}