:root {
  --bg: #eef4fb;
  --panel: #ffffff;
  --text: #0f172a;
  --muted: #5f6b7c;
  --accent: #2563eb;
  --accent-dark: #1d4ed8;
  --border: #d7e3f5;
  --shadow: 0 18px 45px rgba(15, 23, 42, 0.08);
  --shadow-soft: 0 14px 34px rgba(15, 23, 42, 0.06);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  color: var(--text);
  background: radial-gradient(circle at top left, rgba(37, 99, 235, 0.08), transparent 22%), linear-gradient(180deg, #f4f8ff 0%, #eef4fb 100%);
}

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

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 34px;
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(16px);
  position: sticky;
  top: 0;
  z-index: 20;
}

.nav-links a {
  white-space: nowrap;
}

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

.brand-mark {
  display: grid;
  place-items: center;
  width: 50px;
  height: 50px;
  border-radius: 16px;
  background: linear-gradient(135deg, var(--accent), #3b82f6);
  color: #fff;
  font-size: 24px;
}

.brand h2 {
  margin: 0;
  font-size: 1.12rem;
}

.brand p {
  margin: 2px 0 0;
  color: var(--muted);
  font-size: 0.88rem;
}

.nav-links {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.nav-links a {
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
  transition: color 0.2s ease;
}

.nav-links a:hover {
  color: var(--accent-dark);
}

.container {
  width: min(1240px, calc(100% - 46px));
  margin: 0 auto;
  padding: 28px 0 48px;
}

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(320px, 1.4fr) minmax(300px, 1fr);
  align-items: start;
  gap: 40px;
  padding: 50px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(246, 250, 255, 0.95));
  border-radius: 32px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 240px;
  background: radial-gradient(circle at 20% 20%, rgba(37, 99, 235, 0.16), transparent 32%);
  pointer-events: none;
}

.page-home .hero {
  background: linear-gradient(180deg, rgba(255,255,255,0.95), rgba(235, 244, 255, 0.96));
  padding: 56px;
}

.page-home .hero::before {
  height: 240px;
  background: radial-gradient(circle at 18% 18%, rgba(37, 99, 235, 0.22), transparent 26%),
    radial-gradient(circle at 80% 12%, rgba(59, 130, 246, 0.16), transparent 24%);
}

.page-home .hero-card {
  min-height: 420px;
}

.page-home .hero-card.hero-card-large {
  background: linear-gradient(180deg, #eef5ff, #dbeafe);
  border-color: rgba(37, 99, 235, 0.18);
}

.page-home .section {
  background: rgba(248, 252, 255, 0.96);
}

.page-home .feature-item {
  background: linear-gradient(180deg, #f4f8ff, #eaf3ff);
  border-color: #cfe0f8;
}

.page-home .scene-card {
  background: linear-gradient(180deg, #ffffff, #f5f9ff);
  border-color: #dbeafe;
}

.page-home .partner-card {
  background: linear-gradient(180deg, #ffffff, #eff6ff);
  border-color: #c7d2fe;
}

.page-home .contact-card {
  background: linear-gradient(135deg, #1e40af, #2563eb);
}

.page-about .hero {
  background: linear-gradient(180deg, rgba(236, 253, 245, 0.92), rgba(223, 248, 240, 0.98));
}

.page-services .hero {
  background: linear-gradient(180deg, rgba(235, 248, 255, 0.93), rgba(224, 237, 255, 0.98));
}

.page-network .hero {
  background: linear-gradient(180deg, rgba(245, 243, 255, 0.94), rgba(234, 244, 255, 0.98));
}

.page-scenarios .hero {
  background: linear-gradient(180deg, rgba(255, 247, 237, 0.95), rgba(255, 244, 229, 0.98));
}

.page-contact .hero {
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.94), rgba(30, 58, 138, 0.98));
}

.page-contact .hero h1,
.page-contact .hero .lead,
.page-contact .hero .eyebrow,
.page-contact .hero .hero-actions .btn.secondary {
  color: #f8fafc;
}

.page-contact .hero .hero-actions .btn.secondary {
  border-color: rgba(248, 250, 252, 0.3);
}

.page-contact .hero-card {
  background: rgba(15, 23, 42, 0.95);
  border-color: rgba(255, 255, 255, 0.12);
}

.page-contact .hero-card h3,
.page-contact .hero-card li {
  color: #f8fafc;
}

.page-about .hero-card {
  background: rgba(236, 253, 245, 0.95);
  border-color: rgba(16, 185, 129, 0.18);
}

.page-services .hero-card {
  background: rgba(235, 248, 255, 0.95);
  border-color: rgba(37, 99, 235, 0.18);
}

.page-network .hero-card {
  background: rgba(245, 243, 255, 0.95);
  border-color: rgba(139, 92, 246, 0.18);
}

.page-scenarios .hero-card {
  background: rgba(255, 247, 237, 0.95);
  border-color: rgba(251, 146, 60, 0.18);
}

.page-about .section {
  background: rgba(236, 253, 245, 0.95);
}

.page-services .section {
  background: rgba(235, 248, 255, 0.95);
}

.page-network .section {
  background: rgba(245, 243, 255, 0.95);
}

.page-scenarios .section {
  background: rgba(255, 247, 237, 0.95);
}

.page-contact .section {
  background: #f7f9ff;
}

.page-about .section-title p,
.page-about .stat-chip strong,
.page-about .step span {
  color: #059669;
}

.page-services .section-title p,
.page-services .stat-chip strong,
.page-services .step span {
  color: #1d4ed8;
}

.page-network .section-title p,
.page-network .stat-chip strong,
.page-network .step span {
  color: #7c3aed;
}

.page-scenarios .section-title p,
.page-scenarios .stat-chip strong,
.page-scenarios .step span {
  color: #ea580c;
}

.page-contact .section-title p,
.page-contact .stat-chip strong,
.page-contact .step span {
  color: #0f172a;
}

.hero-copy {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 30px;
  max-width: 660px;
}

.hero h1 {
  margin: 0;
  font-size: clamp(32px, 5vw, 56px);
  line-height: 1.08;
}

.lead, .text {
  color: var(--muted);
  line-height: 1.9;
  font-size: 1rem;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 20px;
}

.btn {
  display: inline-block;
  padding: 14px 24px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 700;
}

.btn.primary {
  background: var(--accent);
  color: #fff;
}

.btn.secondary {
  border: 1px solid var(--accent);
  color: var(--accent-dark);
  background: #fff;
}

.hero-card {
  position: relative;
  z-index: 1;
  min-height: 420px;
  padding: 36px;
  border-radius: 28px;
  background: linear-gradient(180deg, #ffffff, #eef5ff);
  border: 1px solid rgba(37, 99, 235, 0.12);
  box-shadow: var(--shadow-soft);
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.hero-card h3 {
  margin-top: 0;
  margin-bottom: 18px;
  font-size: 1.2rem;
}

.hero-card ul {
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
  line-height: 2;
}

.hero-card ul li {
  margin-bottom: 12px;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 14px;
  margin-top: 24px;
}

.stat-chip {
  padding: 18px 20px;
  border-radius: 18px;
  background: #fff;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-soft);
}

.stat-chip strong {
  display: block;
  font-size: 1.4rem;
  color: var(--accent-dark);
  margin-bottom: 6px;
}

.stat-chip span {
  color: var(--muted);
}

.section {
  margin-top: 36px;
  padding: 38px;
  background: rgba(255, 255, 255, 0.96);
  border-radius: 30px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.section-title {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
  max-width: 760px;
}

.section-title h2 {
  margin: 0;
  font-size: clamp(1.55rem, 2.2vw, 2rem);
  line-height: 1.26;
}

.section-title p {
  margin: 0;
  color: var(--accent);
  font-weight: 700;
}

.section-subtitle {
  margin-top: 14px;
  max-width: 760px;
  color: var(--muted);
  line-height: 1.8;
}

.card-grid,
.feature-grid,
.network-grid,
.scene-grid,
.partner-grid,
.faq-grid,
.flow-grid,
.timeline-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
  margin-top: 28px;
}

.info-card,
.network-item,
.scene-card,
.partner-card,
.faq-item,
.feature-item,
.step,
.service-card,
.timeline-item,
.contact-card-panel {
  padding: 24px;
  border-radius: 22px;
  background: #f8fbff;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-soft);
}

.info-card h3,
.network-item h3,
.scene-card h3,
.partner-card h3,
.faq-item h3,
.feature-item h3,
.step h3,
.service-card h3,
.timeline-item h3,
.contact-card-panel h3 {
  margin-top: 0;
  margin-bottom: 10px;
}

.info-card p,
.network-item p,
.scene-card p,
.partner-card p,
.faq-item p,
.feature-item p,
.step p,
.service-card p,
.timeline-item p,
.contact-card-panel p {
  margin: 0;
  color: var(--muted);
  line-height: 1.75;
}

.feature-item {
  background: linear-gradient(180deg, #f9fbff, #eff4ff);
  border-color: #dbeafe;
}

.flow-grid {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.step {
  position: relative;
  overflow: hidden;
}

.step span {
  display: inline-block;
  margin-bottom: 10px;
  font-weight: 700;
  color: var(--accent);
}

.step h3 {
  margin: 0 0 10px;
}

.step p {
  margin: 0;
}

.quote-block {
  padding: 34px;
  background: linear-gradient(135deg, #2563eb, #1d4ed8);
  color: #fff;
  border-radius: 28px;
  box-shadow: var(--shadow);
}

.quote-block p {
  margin: 0;
  line-height: 1.9;
}

.quote-block small {
  display: block;
  margin-top: 18px;
  color: rgba(255, 255, 255, 0.8);
}

.contact-card {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: center;
  margin-top: 32px;
  padding: 36px;
  background: linear-gradient(135deg, #0f172a, #1e3a8a);
  color: white;
  border-radius: 28px;
  box-shadow: var(--shadow);
}

.contact-card h2 {
  margin: 0 0 10px;
}

.contact-card p {
  margin: 0;
  color: rgba(255, 255, 255, 0.88);
  line-height: 1.8;
}

.contact-info,
.contact-card-panel {
  min-width: 260px;
}

.contact-info p {
  margin: 8px 0;
}

.contact-card-panel {
  background: #eef4ff;
  color: var(--text);
}

.timeline-item span {
  display: inline-block;
  margin-bottom: 12px;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(37, 99, 235, 0.12);
  color: var(--accent-dark);
  font-weight: 700;
}

.timeline-item h3 {
  margin-bottom: 8px;
}

.timeline-item p {
  margin: 0;
}

.footer {
  text-align: center;
  padding: 24px 16px 38px;
  color: var(--muted);
  font-size: 0.95rem;
}

@media (max-width: 900px) {
  .hero,
  .two-col,
  .contact-card {
    grid-template-columns: 1fr;
  }

  .topbar {
    padding: 18px 22px;
  }

  .container {
    width: min(1000px, calc(100% - 34px));
  }
}

@media (max-width: 760px) {
  .topbar {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .hero,
  .section,
  .contact-card {
    padding: 24px;
  }

  .nav-links {
    gap: 12px;
  }
}

@media (max-width: 640px) {
  .container {
    width: calc(100% - 28px);
    padding: 18px 0 30px;
  }

  .card-grid,
  .stats,
  .steps,
  .network-grid,
  .scene-grid,
  .faq-grid,
  .partner-grid,
  .flow-grid,
  .timeline-grid {
    grid-template-columns: 1fr;
  }

  .contact-card {
    flex-direction: column;
    align-items: stretch;
  }
}