:root {
  --ink: #10231d;
  --muted: #5c6f68;
  --line: #dce7e2;
  --brand: #0c7a4b;
  --brand-dark: #0c3b2e;
  --accent: #f0b84f;
  --surface: #ffffff;
  --soft: #f4f8f6;
  --shadow: 0 20px 60px rgba(16, 35, 29, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: Arial, "Microsoft YaHei", sans-serif;
  line-height: 1.7;
  background: var(--surface);
}

a {
  color: var(--brand);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px max(20px, calc((100vw - 1180px) / 2));
  background: rgba(255, 255, 255, 0.92);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-weight: 800;
}

.brand:hover {
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  color: #fff;
  font-size: 14px;
  border-radius: 8px;
  background: var(--brand-dark);
}

.nav {
  display: flex;
  gap: 22px;
  font-size: 15px;
}

.nav a {
  color: var(--muted);
  font-weight: 700;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.9fr);
  align-items: center;
  gap: 48px;
  min-height: 680px;
  padding: 72px max(20px, calc((100vw - 1180px) / 2)) 56px;
  background:
    linear-gradient(120deg, rgba(12, 122, 75, 0.12), rgba(240, 184, 79, 0.1)),
    var(--soft);
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--brand);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1 {
  max-width: 820px;
  margin: 0;
  font-size: clamp(42px, 6vw, 72px);
  line-height: 1.08;
  letter-spacing: 0;
}

h2 {
  margin: 0;
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.18;
  letter-spacing: 0;
}

h3 {
  margin: 18px 0 10px;
  font-size: 22px;
  line-height: 1.28;
}

.lead {
  max-width: 700px;
  margin: 24px 0 0;
  color: #2f453e;
  font-size: 20px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  padding: 12px 20px;
  border-radius: 8px;
  font-weight: 800;
  line-height: 1.2;
}

.button:hover {
  text-decoration: none;
}

.button.primary {
  color: #fff;
  background: var(--brand-dark);
  box-shadow: 0 12px 24px rgba(12, 59, 46, 0.22);
}

.button.secondary {
  color: var(--brand-dark);
  background: #fff;
  border: 1px solid var(--line);
}

.notice {
  max-width: 720px;
  margin: 22px 0 0;
  color: #6b4e14;
  font-size: 14px;
}

.wallet-visual {
  display: grid;
  place-items: center;
  min-height: 480px;
}

.phone-frame {
  width: min(340px, 82vw);
  aspect-ratio: 0.58;
  padding: 16px;
  border: 10px solid #12251f;
  border-radius: 34px;
  background: #12251f;
  box-shadow: var(--shadow);
}

.phone-top {
  width: 78px;
  height: 6px;
  margin: 0 auto 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.35);
}

.app-screen {
  height: calc(100% - 20px);
  padding: 22px;
  border-radius: 24px;
  background: linear-gradient(180deg, #f8fffb 0%, #e3f3ec 100%);
}

.screen-title {
  font-size: 22px;
  font-weight: 900;
}

.balance-card {
  display: grid;
  gap: 8px;
  margin: 22px 0;
  padding: 20px;
  color: #fff;
  border-radius: 14px;
  background: var(--brand-dark);
}

.balance-card span {
  color: rgba(255, 255, 255, 0.75);
  font-size: 14px;
}

.balance-card strong {
  font-size: 25px;
  line-height: 1.2;
}

.chain-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.chain-grid span,
.download-bar {
  display: grid;
  min-height: 54px;
  place-items: center;
  border-radius: 10px;
  background: #fff;
  color: var(--brand-dark);
  font-weight: 800;
}

.download-bar {
  margin-top: 18px;
  color: #fff;
  background: var(--brand);
}

.section {
  padding: 78px max(20px, calc((100vw - 1180px) / 2));
}

.band {
  background: var(--soft);
}

.section-head {
  max-width: 760px;
  margin-bottom: 34px;
}

.section-head p:not(.eyebrow),
.article p,
.split p {
  color: var(--muted);
}

.cards {
  display: grid;
  gap: 20px;
}

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

.card {
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 12px 34px rgba(16, 35, 29, 0.06);
}

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

.icon {
  display: inline-grid;
  width: 42px;
  height: 42px;
  place-items: center;
  color: var(--brand-dark);
  border-radius: 8px;
  background: #e6f4ee;
  font-weight: 900;
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(320px, 1.15fr);
  gap: 46px;
  align-items: start;
}

.steps {
  display: grid;
  gap: 16px;
  margin: 0;
  padding-left: 22px;
}

.steps li {
  padding: 18px 20px;
  border-radius: 8px;
  background: #fff;
  border: 1px solid var(--line);
}

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

.checklist div {
  min-height: 150px;
  padding: 22px;
  border-radius: 8px;
  background: var(--soft);
  border: 1px solid var(--line);
}

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

.checklist span {
  margin-top: 10px;
  color: var(--muted);
}

.article {
  max-width: 920px;
}

.content-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

.content-grid article,
.feature-list article,
.term-grid article {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.content-grid h3,
.feature-list h3,
.term-grid h3 {
  margin-top: 0;
}

.content-grid p,
.feature-list p,
.term-grid p {
  color: var(--muted);
}

.feature-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.table-wrap {
  overflow-x: auto;
}

table {
  width: 100%;
  min-width: 620px;
  border-collapse: collapse;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
}

th,
td {
  padding: 16px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

th {
  color: var(--brand-dark);
  background: #e6f4ee;
}

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

tbody tr:last-child td {
  border-bottom: 0;
}

.term-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.faq {
  display: grid;
  gap: 12px;
  max-width: 920px;
}

details {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

summary {
  cursor: pointer;
  padding: 18px 20px;
  color: var(--ink);
  font-weight: 900;
}

details p {
  margin: 0;
  padding: 0 20px 20px;
  color: var(--muted);
}

.site-footer {
  padding: 30px max(20px, calc((100vw - 1180px) / 2));
  color: #d7e6df;
  background: var(--brand-dark);
}

.site-footer p {
  margin: 6px 0;
}

.site-footer a {
  color: #fff;
}

@media (max-width: 900px) {
  .site-header {
    position: static;
    align-items: flex-start;
    flex-direction: column;
  }

  .nav {
    width: 100%;
    justify-content: space-between;
    gap: 10px;
  }

  .hero,
  .split,
  .cards.three,
  .checklist,
  .content-grid,
  .feature-list,
  .term-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding-top: 48px;
  }

  .wallet-visual {
    min-height: 420px;
  }
}

@media (max-width: 560px) {
  .nav {
    flex-wrap: wrap;
    font-size: 14px;
  }

  h1 {
    font-size: 40px;
  }

  .lead {
    font-size: 18px;
  }

  .button {
    width: 100%;
  }

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

  .phone-frame {
    width: min(300px, 92vw);
  }
}