:root {
  color-scheme: light;
  --ink: #152033;
  --muted: #687386;
  --line: #dfe6ef;
  --paper: #fffaf3;
  --surface: #ffffff;
  --green: #23a36b;
  --green-deep: #147a51;
  --blue: #2f6fed;
  --amber: #f3b23f;
  --coral: #e86f51;
  --shadow: 0 18px 45px rgba(32, 45, 67, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 14% 10%, rgba(243, 178, 63, 0.24), transparent 28rem),
    linear-gradient(135deg, #f6fbf7 0%, #fffaf3 46%, #eef5ff 100%);
  font-family: "Noto Serif SC", "Source Han Serif SC", "Microsoft YaHei", serif;
  line-height: 1.7;
}

a {
  color: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid rgba(223, 230, 239, 0.86);
  background: rgba(255, 250, 243, 0.86);
  backdrop-filter: blur(14px);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1120px;
  min-height: 72px;
  margin: 0 auto;
  padding: 0 24px;
}

.brand {
  display: flex;
  gap: 12px;
  align-items: center;
  text-decoration: none;
}

.brand img {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  box-shadow: 0 8px 18px rgba(20, 122, 81, 0.18);
}

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

.brand-subtitle {
  display: block;
  margin-top: -2px;
  color: var(--muted);
  font-size: 13px;
}

.nav-links {
  display: flex;
  gap: 18px;
  align-items: center;
  color: var(--muted);
  font-size: 15px;
}

.nav-links a {
  text-decoration: none;
}

.page {
  max-width: 1120px;
  margin: 0 auto;
  padding: 58px 24px 72px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(300px, 0.8fr);
  gap: 44px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 18px;
  color: var(--green-deep);
  font-size: 15px;
  font-weight: 700;
}

.eyebrow::before {
  width: 32px;
  height: 3px;
  border-radius: 999px;
  background: var(--green);
  content: "";
}

h1 {
  margin: 0;
  max-width: 720px;
  font-size: clamp(42px, 6vw, 76px);
  line-height: 1.06;
  letter-spacing: 0;
}

.lead {
  max-width: 650px;
  margin: 24px 0 0;
  color: #3b4658;
  font-size: 20px;
}

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

.button {
  display: inline-flex;
  min-height: 52px;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  padding: 0 22px;
  font-weight: 800;
  text-decoration: none;
}

.button-primary {
  color: #fff;
  background: var(--green);
  box-shadow: 0 12px 22px rgba(35, 163, 107, 0.22);
}

.button-secondary {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.72);
}

.meta-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 32px;
}

.meta-item {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px 16px;
  background: rgba(255, 255, 255, 0.7);
}

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

.meta-value {
  display: block;
  margin-top: 3px;
  font-weight: 800;
}

.phone {
  position: relative;
  max-width: 360px;
  margin: 0 auto;
  border: 12px solid #213046;
  border-radius: 34px;
  background: #fff;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.phone-screen {
  min-height: 650px;
  padding: 24px 20px;
  background: linear-gradient(180deg, #fff8ed 0%, #f3faf5 100%);
}

.phone-title {
  margin: 0 0 18px;
  font-size: 22px;
  font-weight: 900;
}

.tutorial-card {
  margin-top: 14px;
  border: 1px solid #e9dfcf;
  border-radius: 8px;
  padding: 16px;
  background: #fff;
}

.tutorial-icon {
  display: inline-flex;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  color: #fff;
  background: var(--coral);
  font-weight: 900;
}

.tutorial-title {
  display: block;
  margin-top: 12px;
  font-size: 18px;
  font-weight: 900;
}

.tutorial-text {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-size: 14px;
}

.step-list {
  margin-top: 24px;
}

.step {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  margin-top: 12px;
  border-radius: 8px;
  padding: 12px;
  background: rgba(255, 255, 255, 0.78);
}

.step-number {
  display: inline-flex;
  width: 28px;
  height: 28px;
  flex: 0 0 28px;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  color: #fff;
  background: var(--blue);
  font-weight: 800;
}

.section {
  margin-top: 72px;
}

.section h2 {
  margin: 0;
  font-size: 32px;
  line-height: 1.25;
}

.section-intro {
  max-width: 760px;
  color: var(--muted);
  font-size: 18px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 26px;
}

.feature {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 22px;
  background: rgba(255, 255, 255, 0.76);
}

.feature strong {
  display: block;
  font-size: 18px;
}

.feature span {
  display: block;
  margin-top: 8px;
  color: var(--muted);
}

.notice {
  border-left: 5px solid var(--amber);
  margin-top: 28px;
  border-radius: 8px;
  padding: 18px 20px;
  background: rgba(255, 255, 255, 0.82);
}

.legal-page {
  max-width: 880px;
}

.legal-page h1 {
  font-size: 42px;
}

.legal-page h2 {
  margin-top: 38px;
  font-size: 26px;
}

.legal-page p,
.legal-page li {
  color: #3b4658;
  font-size: 17px;
}

.legal-page ul {
  padding-left: 22px;
}

.site-footer {
  border-top: 1px solid rgba(223, 230, 239, 0.86);
  padding: 28px 24px 42px;
  color: var(--muted);
  text-align: center;
}

@media (max-width: 880px) {
  .nav {
    align-items: flex-start;
    flex-direction: column;
    gap: 14px;
    padding-top: 14px;
    padding-bottom: 14px;
  }

  .nav-links {
    flex-wrap: wrap;
  }

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

  .phone {
    max-width: 320px;
  }

  .phone-screen {
    min-height: 560px;
  }

  .meta-grid,
  .feature-grid {
    grid-template-columns: 1fr;
  }

  .page {
    padding-top: 38px;
  }
}