:root {
  color-scheme: light;
  --ink: #20312f;
  --muted: #65716f;
  --line: #d9e2de;
  --paper: #fbf8f1;
  --surface: #ffffff;
  --soft: #eef5f1;
  --brand: #0f766e;
  --brand-strong: #075e56;
  --accent: #d97706;
  --accent-soft: #fff3d7;
  --shadow: 0 18px 48px rgba(22, 46, 42, 0.12);
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", system-ui, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.7;
}

main {
  flex: 1;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid rgba(217, 226, 222, 0.9);
  background: rgba(251, 248, 241, 0.94);
  backdrop-filter: blur(12px);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  width: min(1120px, calc(100% - 32px));
  min-height: 72px;
  margin: 0 auto;
}

.brand {
  display: grid;
  gap: 0;
}

.brand-name {
  font-size: 20px;
  font-weight: 800;
}

.brand-note {
  color: var(--muted);
  font-size: 13px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 20px;
  color: var(--muted);
  font-size: 15px;
  white-space: nowrap;
}

.nav-links a:hover {
  color: var(--brand-strong);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border-radius: 6px;
  background: var(--brand);
  color: #fff;
  font-weight: 700;
  box-shadow: 0 10px 24px rgba(15, 118, 110, 0.18);
}

.button:hover {
  background: var(--brand-strong);
}

.button.secondary {
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--brand-strong);
  box-shadow: none;
}

.hero {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding: 72px 0 44px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(320px, 0.92fr);
  gap: 48px;
  align-items: center;
}

.eyebrow {
  color: var(--brand-strong);
  font-size: 15px;
  font-weight: 800;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 720px;
  margin-bottom: 18px;
  font-size: 48px;
  line-height: 1.16;
}

h2 {
  margin-bottom: 14px;
  font-size: 32px;
  line-height: 1.25;
}

h3 {
  margin-bottom: 8px;
  font-size: 20px;
  line-height: 1.35;
}

.lead {
  max-width: 720px;
  color: var(--muted);
  font-size: 19px;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.hero-panel {
  border: 1px solid rgba(217, 226, 222, 0.9);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.phone-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 18px;
  background: var(--brand-strong);
  color: #fff;
  font-weight: 800;
}

.phone-screen {
  display: grid;
  gap: 14px;
  padding: 22px;
}

.mini-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 16px;
  background: #fff;
}

.mini-card.highlight {
  border-color: rgba(217, 119, 6, 0.35);
  background: var(--accent-soft);
}

.mini-label {
  color: var(--muted);
  font-size: 13px;
}

.mini-value {
  margin-top: 4px;
  color: var(--ink);
  font-size: 18px;
  font-weight: 800;
}

.section {
  padding: 54px 0;
}

.section.alt {
  background: var(--soft);
}

.container {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
}

.section-head {
  max-width: 740px;
  margin-bottom: 28px;
}

.muted {
  color: var(--muted);
}

.grid {
  display: grid;
  gap: 18px;
}

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

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

.card {
  min-height: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 22px;
  background: var(--surface);
}

.step {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--brand);
  color: #fff;
  font-weight: 800;
}

.info-list {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.info-list li {
  padding-left: 16px;
  border-left: 3px solid var(--brand);
}

.notice {
  border: 1px solid rgba(217, 119, 6, 0.3);
  border-radius: 8px;
  padding: 20px;
  background: var(--accent-soft);
}

.page-title {
  padding: 58px 0 34px;
}

.content {
  max-width: 860px;
}

.content p,
.content li {
  color: var(--muted);
}

.content ul {
  padding-left: 22px;
}

.site-footer {
  padding: 32px 0;
  border-top: 1px solid var(--line);
  background: var(--surface);
}

.footer-grid {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  color: var(--muted);
  font-size: 14px;
}

.icp {
  color: var(--muted);
}

@media (max-width: 860px) {
  .nav {
    align-items: flex-start;
    flex-direction: column;
    gap: 12px;
    padding: 14px 0;
  }

  .nav-links {
    flex-wrap: wrap;
    gap: 12px 16px;
    font-size: 14px;
  }

  .hero {
    padding-top: 44px;
  }

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

  h1 {
    font-size: 36px;
  }

  h2 {
    font-size: 27px;
  }

  .lead {
    font-size: 17px;
  }

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

@media (max-width: 520px) {
  .brand-name {
    font-size: 18px;
  }

  .hero {
    padding-top: 34px;
  }

  h1 {
    font-size: 31px;
  }

  .button {
    width: 100%;
  }
}