:root {
  --bg: #f4f8fd;
  --bg-soft: #eef4fb;
  --surface: #ffffff;
  --surface-strong: #f9fbff;
  --line: rgba(22, 59, 112, 0.12);
  --line-strong: rgba(46, 91, 255, 0.18);
  --text: #1b2a41;
  --muted: #64748b;
  --primary: #163b70;
  --primary-deep: #0f2c55;
  --accent: #2e5bff;
  --accent-soft: #eaf1ff;
  --success: #18a67e;
  --shadow-lg: 0 22px 60px rgba(15, 44, 85, 0.12);
  --shadow-md: 0 14px 35px rgba(22, 59, 112, 0.08);
  --shadow-sm: 0 10px 25px rgba(22, 59, 112, 0.06);
  --radius-xl: 28px;
  --radius-lg: 20px;
  --radius-md: 16px;
  --radius-sm: 12px;
  --container: 1180px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Inter", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: #f6f8fc;
}

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

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

button,
input,
textarea,
select {
  font: inherit;
}

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

.container {
  width: min(var(--container), calc(100% - 48px));
  margin: 0 auto;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  backdrop-filter: blur(18px);
  background: rgba(247, 251, 255, 0.86);
  border-bottom: 1px solid rgba(22, 59, 112, 0.06);
}

.topbar-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  min-height: 86px;
}

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

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  border-radius: 14px;
  color: #fff;
  font-weight: 800;
  background: var(--accent);
  box-shadow: var(--shadow-sm);
}

.brand-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.brand-text strong {
  font-size: 1rem;
  line-height: 1.2;
}

.brand-text small {
  font-size: 0.78rem;
  color: var(--muted);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.site-nav {
  display: inline-flex;
  align-items: center;
  gap: 28px;
  margin-left: 42px;
  color: var(--muted);
}

.site-nav a {
  position: relative;
  font-size: 0.95rem;
  transition: color 0.2s ease;
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -8px;
  width: 100%;
  height: 2px;
  border-radius: 999px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.2s ease;
}

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

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

.topbar-actions,
.hero-actions,
.cta-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.topbar-actions {
  margin-left: auto;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 600;
  transition:
    transform 0.2s ease,
    box-shadow 0.2s ease,
    border-color 0.2s ease,
    background-color 0.2s ease;
}

.btn:hover,
.btn:focus-visible {
  transform: translateY(-1px);
}

.btn-primary {
  color: #fff;
  background: var(--accent);
  box-shadow: 0 10px 24px rgba(46, 91, 255, 0.22);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background: #2450f2;
  box-shadow: 0 12px 28px rgba(46, 91, 255, 0.24);
}

.btn-secondary {
  color: var(--primary);
  background: rgba(255, 255, 255, 0.88);
  border-color: var(--line-strong);
}

.btn-secondary:hover,
.btn-secondary:focus-visible {
  background: #fff;
  box-shadow: var(--shadow-sm);
}

.nav-toggle {
  display: none;
  width: 48px;
  height: 48px;
  padding: 0;
  border: 0;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: var(--shadow-sm);
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  margin: 4px auto;
  border-radius: 999px;
  background: var(--primary);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.hero {
  padding: 48px 0 34px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(360px, 0.95fr);
  gap: 48px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 18px;
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.eyebrow::before {
  content: "";
  width: 24px;
  height: 1px;
  background: currentColor;
}

.hero h1,
.section-heading h2,
.cta-card h2 {
  margin: 0;
  color: var(--primary-deep);
  letter-spacing: -0.03em;
}

.hero h1 {
  font-size: clamp(2.85rem, 4.2vw, 4.6rem);
  line-height: 1.02;
  max-width: 14ch;
}

.hero-title span {
  display: block;
  white-space: nowrap;
}

.hero-text,
.section-heading p,
.feature-card p,
.solution-card p,
.timeline-step p,
.pricing-card li,
.comparison-row span,
.cta-card p,
.footer p,
.footer a {
  color: var(--muted);
}

.hero-text {
  margin: 22px 0 0;
  max-width: 640px;
  font-size: 1.08rem;
  line-height: 1.9;
}

.hero-actions {
  margin-top: 30px;
}

.trust-points,
.pricing-card ul {
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.trust-points {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.trust-points li {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(22, 59, 112, 0.08);
  border-radius: 999px;
  box-shadow: var(--shadow-sm);
  color: var(--primary);
  font-size: 0.95rem;
}

.trust-points li::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: var(--accent);
}

.hero-panel {
  position: relative;
}

.hero-panel::before {
  content: "";
  position: absolute;
  inset: auto 8% -5% auto;
  width: 180px;
  height: 180px;
  background: rgba(46, 91, 255, 0.08);
  filter: blur(8px);
  z-index: -1;
}

.status-card,
.mini-card,
.feature-card,
.solution-card,
.comparison-card,
.timeline-step,
.pricing-card,
.cta-card {
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid rgba(255, 255, 255, 0.72);
  box-shadow: var(--shadow-md);
}

.status-main {
  padding: 28px;
  border-radius: var(--radius-xl);
}

.status-head {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  background: var(--surface-strong);
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--primary);
  font-weight: 600;
}

.status-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 0 5px rgba(24, 166, 126, 0.12);
}

.metric-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 28px;
}

.metric-item {
  padding: 22px;
  border-radius: var(--radius-lg);
  background: #ffffff;
  border: 1px solid var(--line);
}

.metric-item strong {
  display: block;
  font-size: clamp(2rem, 3vw, 2.8rem);
  color: var(--primary-deep);
  line-height: 1;
}

.metric-item span,
.mini-card p,
.mini-card span,
.timeline-index,
.plan-tag {
  color: var(--muted);
}

.metric-item span {
  display: block;
  margin-top: 12px;
  font-size: 0.92rem;
}

.status-chart {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 10px;
  align-items: end;
  margin-top: 28px;
  height: 120px;
}

.status-chart span {
  border-radius: 18px 18px 8px 8px;
  background: rgba(46, 91, 255, 0.82);
}

.status-chart span:nth-child(1) { height: 42%; }
.status-chart span:nth-child(2) { height: 58%; }
.status-chart span:nth-child(3) { height: 76%; }
.status-chart span:nth-child(4) { height: 62%; }
.status-chart span:nth-child(5) { height: 84%; }
.status-chart span:nth-child(6) { height: 96%; }

.mini-cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 18px;
}

.mini-card {
  padding: 22px 20px;
  border-radius: var(--radius-lg);
}

.mini-card p,
.plan-tag {
  margin: 0;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.mini-card strong,
.pricing-card strong {
  display: block;
  margin-top: 12px;
  color: var(--primary-deep);
}

.mini-card strong {
  font-size: 1.4rem;
}

.mini-card span {
  display: block;
  margin-top: 10px;
  line-height: 1.7;
  font-size: 0.92rem;
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 36px;
}

.hero-badges span {
  padding: 12px 18px;
  border-radius: 999px;
  color: var(--primary);
  background: rgba(255, 255, 255, 0.88);
  border: 1px solid var(--line);
}

.section {
  padding: 110px 0;
}

.section-soft {
  background: #f2f6fc;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 46px;
}

.section-heading-wide {
  max-width: 980px;
}

.section-heading h2,
.cta-card h2 {
  font-size: clamp(2rem, 2.7vw, 3.1rem);
  line-height: 1.14;
  text-wrap: balance;
}

.section-heading p,
.cta-card p {
  margin: 18px 0 0;
  line-height: 1.85;
  font-size: 1.02rem;
}

.feature-grid,
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}

.feature-card,
.solution-card,
.pricing-card {
  padding: 30px;
  border-radius: var(--radius-lg);
}

.feature-card h3,
.solution-card h3,
.timeline-step h3,
.pricing-card h3 {
  margin: 0;
  color: var(--primary-deep);
  font-size: 1.18rem;
}

.feature-card p,
.solution-card p,
.timeline-step p {
  margin: 16px 0 0;
  line-height: 1.8;
}

.two-column {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
  gap: 34px;
  align-items: start;
}

.solution-list {
  display: grid;
  gap: 18px;
}

.solution-card {
  position: relative;
  padding-left: 34px;
}

.solution-card::before {
  content: "";
  position: absolute;
  left: 18px;
  top: 32px;
  width: 4px;
  height: calc(100% - 64px);
  border-radius: 999px;
  background: var(--accent);
}

.comparison-card {
  overflow: hidden;
  border-radius: var(--radius-xl);
}

.comparison-row {
  display: grid;
  grid-template-columns: 1.05fr 1fr 1fr;
  gap: 18px;
  padding: 22px 28px;
  border-bottom: 1px solid rgba(22, 59, 112, 0.08);
}

.comparison-row:last-child {
  border-bottom: 0;
}

.comparison-head {
  background: var(--primary);
}

.comparison-head span {
  color: #fff;
  font-weight: 600;
}

.timeline {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

.timeline-step {
  position: relative;
  padding: 30px;
  border-radius: var(--radius-lg);
}

.timeline-index {
  display: inline-flex;
  margin-bottom: 18px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.pricing-wrap .section-heading {
  max-width: 980px;
  text-align: center;
  margin-left: auto;
  margin-right: auto;
}

.pricing-card {
  display: flex;
  flex-direction: column;
  gap: 18px;
  min-height: 100%;
}

.pricing-card strong {
  font-size: 1.9rem;
  line-height: 1.2;
}

.pricing-card ul {
  display: grid;
  gap: 12px;
  flex: 1;
}

.pricing-card li {
  position: relative;
  padding-left: 22px;
  line-height: 1.7;
}

.pricing-card li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
}

.pricing-card.featured {
  position: relative;
  background: #ffffff;
  border: 1px solid rgba(46, 91, 255, 0.18);
  transform: translateY(-8px);
}

.section-cta {
  padding-top: 28px;
  padding-bottom: 110px;
}

.cta-card {
  display: grid;
  gap: 32px;
  padding: 42px;
  border-radius: var(--radius-xl);
  background: #ffffff;
}

.cta-content {
  max-width: 760px;
}

.cta-content-wide {
  max-width: 980px;
}

.model-ecosystem {
  padding: 30px;
  border-radius: var(--radius-lg);
  background: #f7faff;
  border: 1px solid rgba(22, 59, 112, 0.08);
}

.ecosystem-head strong {
  display: block;
  color: var(--primary-deep);
  font-size: 1.12rem;
}

.ecosystem-head span {
  display: block;
  margin-top: 10px;
  color: var(--muted);
  line-height: 1.8;
}

.model-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin-top: 24px;
}

.model-card {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 78px;
  padding: 18px 20px;
  border-radius: var(--radius-md);
  background: #ffffff;
  border: 1px solid rgba(22, 59, 112, 0.08);
  box-shadow: var(--shadow-sm);
  text-align: center;
}

.model-card strong {
  display: block;
  color: var(--primary-deep);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.consult-modal {
  position: fixed;
  inset: 0;
  z-index: 90;
  display: grid;
  place-items: center;
  padding: 24px;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.24s ease, visibility 0.24s ease;
}

.consult-modal.is-open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.consult-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(15, 44, 85, 0.4);
  backdrop-filter: blur(8px);
}

.consult-dialog {
  position: relative;
  width: min(100%, 760px);
  padding: 34px;
  border-radius: 24px;
  background: #ffffff;
  border: 1px solid rgba(22, 59, 112, 0.08);
  box-shadow: 0 24px 70px rgba(15, 44, 85, 0.22);
}

.consult-close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 40px;
  height: 40px;
  border: 0;
  border-radius: 999px;
  background: #f3f7ff;
  color: var(--primary);
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
}

.consult-tag {
  margin: 0 0 12px;
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.consult-dialog h3 {
  margin: 0;
  color: var(--primary-deep);
  font-size: clamp(1.55rem, 2.6vw, 2.1rem);
  line-height: 1.28;
  max-width: 18ch;
  text-wrap: balance;
}

.consult-desc,
.consult-note {
  color: var(--muted);
}

.consult-desc {
  margin: 16px 0 0;
  line-height: 1.85;
  max-width: 58ch;
}

.consult-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(220px, 0.85fr);
  gap: 24px;
  align-items: start;
  margin-top: 26px;
}

.consult-main {
  min-width: 0;
}

.consult-wechat {
  padding: 22px 24px;
  border-radius: 18px;
  background: #f7faff;
  border: 1px solid rgba(22, 59, 112, 0.08);
}

.consult-wechat span {
  display: block;
  color: var(--muted);
  font-size: 0.9rem;
}

.consult-wechat strong {
  display: block;
  margin-top: 10px;
  color: var(--primary-deep);
  font-size: 1.5rem;
  letter-spacing: 0.02em;
  word-break: keep-all;
}

.consult-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: 24px;
}

.consult-note {
  margin: 16px 0 0;
  font-size: 0.92rem;
}

.consult-qr {
  display: flex;
}

.consult-qr-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 220px;
  padding: 22px;
  border-radius: 18px;
  background:
    linear-gradient(180deg, rgba(247, 250, 255, 0.95), rgba(239, 245, 255, 0.95));
  border: 1px dashed rgba(46, 91, 255, 0.22);
  color: var(--primary);
  text-align: center;
}

.consult-qr-image {
  width: min(100%, 180px);
  aspect-ratio: 1 / 1;
  object-fit: contain;
  border-radius: 12px;
  background: #ffffff;
}

.consult-qr-box span {
  display: block;
  font-weight: 700;
  font-size: 1.02rem;
  margin-top: 12px;
}

.footer {
  padding: 0 0 48px;
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 28px;
  padding-top: 28px;
  border-top: 1px solid rgba(22, 59, 112, 0.08);
}

.footer p {
  max-width: 520px;
  line-height: 1.8;
}

.footer-meta {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, auto));
  gap: 20px;
  justify-content: end;
}

.footer-meta span {
  display: block;
  margin-bottom: 10px;
  color: var(--primary);
  font-weight: 600;
}

.footer-meta p {
  margin: 0;
}

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition:
    opacity 0.6s ease,
    transform 0.6s ease;
}

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

@media (max-width: 1080px) {
  .topbar-inner {
    flex-wrap: wrap;
    padding: 18px 0;
  }

  .site-nav {
    order: 4;
    width: 100%;
    justify-content: center;
  }

  .hero-grid,
  .two-column,
  .feature-grid,
  .pricing-grid,
  .timeline,
  .footer-grid {
    grid-template-columns: 1fr;
  }

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

  .cta-card {
    padding: 34px;
  }

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

@media (max-width: 820px) {
  .container {
    width: min(var(--container), calc(100% - 32px));
  }

  .topbar-actions {
    display: none;
  }

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

  .site-nav {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: flex-start;
    gap: 18px;
    padding: 18px;
    background: rgba(255, 255, 255, 0.96);
    border: 1px solid rgba(22, 59, 112, 0.08);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
  }

  .site-nav.is-open {
    display: flex;
  }

  .hero {
    padding-top: 24px;
  }

  .hero-grid {
    gap: 30px;
  }

  .hero h1 {
    max-width: none;
  }

  .hero-title span {
    white-space: normal;
  }

  .section-heading h2,
  .cta-card h2 {
    text-wrap: wrap;
  }

  .metric-row,
  .comparison-row,
  .footer-meta,
  .model-grid {
    grid-template-columns: 1fr;
  }

  .comparison-row {
    gap: 10px;
  }

  .section,
  .section-cta {
    padding: 84px 0;
  }

  .status-main,
  .feature-card,
  .solution-card,
  .timeline-step,
  .pricing-card,
  .cta-card {
    padding: 24px;
  }
}

@media (max-width: 560px) {
  .hero-actions,
  .cta-actions,
  .consult-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .btn {
    width: 100%;
  }

  .consult-dialog {
    padding: 26px 20px;
  }

  .consult-layout {
    grid-template-columns: 1fr;
  }

  .consult-dialog h3,
  .consult-desc {
    max-width: none;
  }

  .trust-points,
  .hero-badges {
    flex-direction: column;
  }

  .hero-badges span,
  .trust-points li {
    width: 100%;
    justify-content: center;
  }
}