:root {
  color-scheme: light;
  --bg: #f7f9fc;
  --bg-soft: #ffffff;
  --surface: #ffffff;
  --surface-soft: #f3f6fb;
  --text: #18212f;
  --muted: #667085;
  --line: #e7ecf3;
  --primary: #2563eb;
  --primary-soft: #eff4ff;
  --accent: #dbe7ff;
  --shadow: 0 12px 32px rgba(15, 23, 42, 0.06);
  --radius-xl: 24px;
  --radius-lg: 18px;
  --radius-md: 12px;
  --container: min(1120px, calc(100vw - 48px));
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Inter", "Microsoft YaHei", sans-serif;
  background: linear-gradient(180deg, #fbfcfe 0%, #f5f7fb 100%);
  color: var(--text);
}

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

button {
  font: inherit;
}

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

.container {
  width: var(--container);
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(12px);
  background: rgba(255, 255, 255, 0.9);
  border-bottom: 1px solid var(--line);
}

.header-inner,
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: var(--primary-soft);
  color: var(--primary);
  font-weight: 800;
}

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

.main-nav a:hover,
.header-action:hover {
  color: var(--primary);
}

.header-action,
.primary-button,
.secondary-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 999px;
  border: 1px solid transparent;
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.header-action,
.primary-button {
  background: var(--primary);
  color: #ffffff;
  box-shadow: 0 10px 24px rgba(37, 99, 235, 0.18);
}

.secondary-button {
  background: #ffffff;
  color: var(--text);
  border-color: var(--line);
}

.header-action:hover,
.primary-button:hover,
.secondary-button:hover {
  transform: translateY(-2px);
}

.hero-section {
  padding: 80px 0 40px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(320px, 0.8fr);
  gap: 32px;
  align-items: center;
}

.hero-content h1 {
  margin: 18px 0 18px;
  font-size: clamp(42px, 6vw, 68px);
  line-height: 1.05;
  letter-spacing: -0.04em;
}

.hero-content p {
  max-width: 640px;
  margin: 0;
  font-size: 18px;
  line-height: 1.8;
  color: var(--muted);
}

.hero-badge,
.section-heading span,
.panel-card span,
.trust-banner span,
.footer-title {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  letter-spacing: 0.04em;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 32px;
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 42px;
}

.hero-metrics article,
.panel-card,
.info-card,
.service-card,
.process-item,
.trust-banner {
  border: 1px solid var(--line);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.hero-metrics article,
.panel-card {
  border-radius: var(--radius-lg);
  padding: 22px;
}

.hero-metrics strong,
.panel-card strong {
  display: block;
  margin-bottom: 10px;
  font-size: 18px;
  color: var(--text);
}

.hero-metrics span,
.panel-card li {
  color: var(--muted);
  line-height: 1.7;
}

.hero-panel {
  display: grid;
  gap: 18px;
}

.panel-card-primary {
  background: var(--primary-soft);
}

.panel-card ul {
  margin: 0;
  padding-left: 20px;
}

.section {
  padding: 48px 0;
}

.section-muted {
  background: transparent;
}

.section-heading {
  max-width: 720px;
  margin-bottom: 28px;
}

.section-heading h2 {
  margin: 14px 0 12px;
  font-size: clamp(30px, 4vw, 46px);
  line-height: 1.15;
  letter-spacing: -0.03em;
}

.section-heading p {
  margin: 0;
  color: var(--muted);
  line-height: 1.8;
}

.advantages-grid,
.services-grid,
.process-grid {
  display: grid;
  gap: 20px;
}

.advantages-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

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

.process-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.info-card,
.service-card,
.process-item {
  border-radius: var(--radius-xl);
  padding: 28px;
}

.info-card strong,
.service-card h3,
.process-item h3 {
  display: block;
  margin: 0 0 12px;
  color: var(--text);
  font-size: 22px;
}

.info-card p,
.service-card p,
.process-item p {
  margin: 0;
  color: var(--muted);
  line-height: 1.8;
}

.process-item em {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  margin-bottom: 18px;
  border-radius: 16px;
  background: var(--primary-soft);
  color: var(--primary);
  font-style: normal;
  font-weight: 700;
}

.trust-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 34px;
  border-radius: 32px;
}

.trust-banner h2 {
  max-width: 720px;
  margin: 14px 0 0;
  font-size: clamp(28px, 3.6vw, 42px);
  line-height: 1.2;
}

.trust-points {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 12px;
}

.trust-points span {
  padding: 12px 16px;
  border-radius: 999px;
  background: var(--surface-soft);
  border: 1px solid var(--line);
  color: var(--text);
}

.site-footer {
  padding: 24px 0 48px;
}

.footer-inner {
  border-top: 1px solid var(--line);
  padding-top: 28px;
}

.footer-title {
  color: var(--text);
}

.site-footer p {
  margin: 10px 0 0;
  color: var(--muted);
}

.footer-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

@media (max-width: 1100px) {
  .advantages-grid,
  .process-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 900px) {
  .main-nav {
    display: none;
  }

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

  .trust-banner,
  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }

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

  .trust-points {
    justify-content: flex-start;
  }
}

@media (max-width: 640px) {
  :root {
    --container: min(100vw - 32px, 100vw - 32px);
  }

  .hero-section {
    padding-top: 56px;
  }

  .hero-content h1 {
    font-size: 38px;
  }

  .advantages-grid,
  .services-grid,
  .process-grid {
    grid-template-columns: 1fr;
  }

  .header-inner {
    flex-wrap: wrap;
  }

  .header-action,
  .primary-button,
  .secondary-button {
    width: 100%;
  }

  .hero-actions,
  .footer-actions {
    width: 100%;
  }
}