:root {
  --brand: #08b89d;
  --brand-dark: #078b79;
  --blue: #2563eb;
  --ink: #0f172a;
  --muted: #64748b;
  --line: #dbe3ee;
  --soft: #f5f8fb;
  --panel: #ffffff;
  --shadow: 0 18px 50px rgba(15, 23, 42, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: #f3f6fa;
  font-family: "Inter", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  line-height: 1.65;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 76px;
  padding: 0 max(28px, calc((100vw - 1180px) / 2));
  border-bottom: 1px solid rgba(219, 227, 238, 0.72);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(16px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  font-weight: 700;
  color: #0f3c3a;
}

.brand img {
  width: 132px;
  height: auto;
}

.brand span {
  padding-left: 14px;
  border-left: 1px solid #dbe3ee;
  white-space: nowrap;
}

.nav-links,
.nav-actions,
.hero-actions,
.entry-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-links {
  gap: 28px;
  color: #334155;
  font-size: 14px;
}

.nav-links a:hover,
.link-btn:hover {
  color: var(--brand-dark);
}

.link-btn {
  color: #334155;
  font-size: 14px;
}

.primary-btn,
.secondary-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 22px;
  border-radius: 8px;
  border: 1px solid transparent;
  font-size: 14px;
  font-weight: 700;
  white-space: nowrap;
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}

.primary-btn {
  color: #fff;
  background: linear-gradient(135deg, var(--brand), var(--blue));
  box-shadow: 0 12px 24px rgba(37, 99, 235, 0.2);
}

.primary-btn.small {
  min-height: 38px;
  padding: 0 16px;
}

.secondary-btn {
  color: #0f172a;
  background: #fff;
  border-color: var(--line);
}

.primary-btn:hover,
.secondary-btn:hover {
  transform: translateY(-1px);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.04fr) minmax(360px, 0.96fr);
  gap: 56px;
  max-width: 1180px;
  min-height: 480px;
  margin: 0 auto;
  padding: 42px 28px 32px;
  align-items: center;
}

.eyebrow,
.section-head span,
.docs > div:first-child > span,
.entry-card span {
  display: inline-flex;
  color: var(--brand-dark);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
}

.hero h1 {
  max-width: 660px;
  margin: 18px 0 20px;
  font-size: 46px;
  line-height: 1.14;
  letter-spacing: 0;
}

.hero-desc {
  max-width: 620px;
  margin: 0;
  color: var(--muted);
  font-size: 17px;
}

.hero-actions {
  margin-top: 34px;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
  color: #475569;
  font-size: 13px;
}

.hero-meta span {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 0 12px;
  border: 1px solid #dbe3ee;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.76);
}

.hero-visual {
  position: relative;
  display: grid;
  gap: 14px;
  width: 82%;
  justify-self: center;
  padding: 18px;
  border: 1px solid rgba(219, 227, 238, 0.9);
  border-radius: 16px;
  background:
    radial-gradient(circle at 82% 12%, rgba(8, 184, 157, 0.14), transparent 34%),
    linear-gradient(180deg, #fff, #f7fbff);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.visual-top {
  display: grid;
  gap: 4px;
  padding: 10px;
  border-radius: 12px;
  background: #0f172a;
  color: #fff;
}

.visual-top span,
.visual-top em {
  color: #b6c3d6;
  font-size: 12px;
  font-style: normal;
}

.visual-top strong {
  font-size: 24px;
  line-height: 1.2;
}

.pay-card {
  display: grid;
  grid-template-columns: 12px 1fr auto;
  gap: 14px;
  align-items: center;
  min-height: 58px;
  padding: 12px;
  border: 1px solid #dbe3ee;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.9);
}

.pay-card.active {
  border-color: rgba(8, 184, 157, 0.38);
  box-shadow: 0 12px 26px rgba(8, 184, 157, 0.1);
}

.pay-card strong,
.pay-card span {
  display: block;
}

.pay-card span {
  color: var(--muted);
  font-size: 12px;
}

.pay-card b {
  color: #0f766e;
  font-size: 12px;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.dot.green { background: var(--brand); }
.dot.blue { background: var(--blue); }
.dot.orange { background: #f59e0b; }

.visual-chart {
  display: flex;
  align-items: end;
  gap: 10px;
  height: 72px;
  margin-top: 4px;
  padding: 18px;
  border-radius: 12px;
  background: #eef6f8;
}

.visual-chart span {
  flex: 1;
  min-width: 18px;
  border-radius: 8px 8px 2px 2px;
  background: linear-gradient(180deg, var(--blue), var(--brand));
}

.section {
  max-width: 1180px;
  margin: 0 auto;
  padding: 76px 28px;
  scroll-margin-top: 92px;
}

.hero + .section {
  padding-top: 42px;
}

.section.muted {
  max-width: none;
  padding-left: max(28px, calc((100vw - 1180px) / 2));
  padding-right: max(28px, calc((100vw - 1180px) / 2));
  background: #fff;
}

.section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 28px;
}

.section-head h2,
.docs h2,
.entry-card h2 {
  margin: 4px 0 0;
  color: var(--ink);
  font-size: 30px;
  line-height: 1.25;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.product-grid article {
  min-height: 242px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--panel);
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.04);
}

.icon {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border-radius: 10px;
  color: #fff;
  background: linear-gradient(135deg, var(--brand), var(--blue));
  font-weight: 800;
}

.product-grid h3 {
  margin: 20px 0 8px;
  font-size: 18px;
}

.product-grid p,
.docs p,
.entry-card p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.capability-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 28px;
  align-items: center;
}

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

.capability-list div {
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
}

.capability-list strong,
.capability-list span {
  display: block;
}

.capability-list span {
  margin-top: 6px;
  color: var(--muted);
  font-size: 14px;
}

.phone-preview {
  width: 100%;
  min-height: 430px;
  padding: 26px 24px;
  border: 10px solid #172033;
  border-radius: 34px;
  background: #fff;
  box-shadow: var(--shadow);
  text-align: center;
}

.phone-head {
  width: 72px;
  height: 6px;
  margin: 0 auto 34px;
  border-radius: 999px;
  background: #cbd5e1;
}

.qr-box {
  width: 178px;
  height: 178px;
  margin: 0 auto 24px;
  position: relative;
  display: grid;
  place-items: center;
  padding: 4px;
  border: 10px solid #eef6f8;
  border-radius: 16px;
  background: #fff;
}

.qr-box img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.phone-preview strong,
.phone-preview span {
  display: block;
}

.phone-preview span {
  margin-top: 6px;
  color: var(--muted);
  font-size: 13px;
}

.phone-preview button {
  width: 100%;
  height: 42px;
  margin-top: 28px;
  border: 0;
  border-radius: 8px;
  color: #fff;
  background: var(--brand);
  font-weight: 700;
}

.flow {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.flow li {
  min-height: 184px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
}

.flow b {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  color: #fff;
  background: #0f172a;
}

.flow strong,
.flow span {
  display: block;
}

.flow strong {
  margin-top: 18px;
}

.flow span {
  margin-top: 6px;
  color: var(--muted);
  font-size: 13px;
}

.docs,
.entry {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(340px, 1.1fr);
  gap: 68px;
  align-items: center;
}

.docs {
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #0f172a;
  color: #fff;
  box-shadow: var(--shadow);
}

.docs p {
  color: #b6c3d6;
}

.doc-cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.doc-cards a {
  display: grid;
  place-items: center;
  min-height: 92px;
  padding: 18px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.08);
  font-weight: 700;
  text-align: center;
  transition: transform 0.18s ease, border-color 0.18s ease, background 0.18s ease, box-shadow 0.18s ease;
}

.doc-cards a:hover {
  transform: translateY(-4px);
  border-color: rgba(8, 184, 157, 0.55);
  background: rgba(8, 184, 157, 0.16);
  box-shadow: 0 16px 30px rgba(8, 184, 157, 0.14);
}

.entry {
  padding-top: 34px;
}

.entry-card {
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
}

.entry-actions {
  flex-wrap: wrap;
  justify-content: flex-end;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
  padding: 34px 28px 46px;
  color: var(--muted);
  font-size: 13px;
}

.site-footer img {
  width: 28px;
  height: 28px;
}

@media (max-width: 980px) {
  .site-header {
    height: auto;
    padding: 16px 20px;
    align-items: flex-start;
    flex-wrap: wrap;
  }

  .nav-links {
    order: 3;
    width: 100%;
    overflow-x: auto;
    padding-bottom: 2px;
  }

  .hero,
  .capability-layout,
  .docs,
  .entry {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding-top: 54px;
  }

  .hero h1 {
    font-size: 40px;
  }

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

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

  .entry-actions {
    justify-content: flex-start;
  }
}

@media (max-width: 640px) {
  .brand img {
    width: 116px;
  }

  .brand span {
    display: none;
  }

  .nav-actions {
    width: 100%;
    justify-content: space-between;
  }

  .nav-actions .link-btn,
  .nav-actions .primary-btn {
    flex: 1;
  }

  .hero {
    padding: 42px 18px 54px;
  }

  .hero h1 {
    font-size: 32px;
  }

  .hero-desc {
    font-size: 15px;
  }

  .hero-actions,
  .entry-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .hero-visual {
    width: 100%;
    padding: 16px;
  }

  .visual-top strong {
    font-size: 26px;
  }

  .section,
  .section.muted {
    padding: 54px 18px;
  }

  .section-head {
    display: block;
  }

  .product-grid,
  .capability-list,
  .flow,
  .doc-cards {
    grid-template-columns: 1fr;
  }

  .phone-preview {
    min-height: 390px;
  }

  .docs {
    border-radius: 12px;
  }
}