:root {
  color-scheme: light;
  --bg: #f5f2ea;
  --surface: rgba(255, 255, 255, 0.82);
  --surface-solid: #ffffff;
  --surface-muted: #f7f6f2;
  --text: #162118;
  --muted: #6b756c;
  --line: rgba(22, 33, 24, 0.08);
  --brand: #5cb54d;
  --brand-soft: #e6f5e1;
  --peach: #f6d7cc;
  --mint: #dcefd6;
  --shadow: 0 18px 50px rgba(41, 54, 41, 0.08);
  --radius-xl: 28px;
  --radius-lg: 22px;
  --radius-md: 16px;
  --radius-sm: 12px;
  --max-width: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top right, rgba(92, 181, 77, 0.18), transparent 28%),
    radial-gradient(circle at bottom left, rgba(240, 215, 194, 0.2), transparent 24%),
    linear-gradient(180deg, #fbfaf7 0%, var(--bg) 100%);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

.container {
  width: min(var(--max-width), calc(100% - 40px));
  margin: 0 auto;
}

.page-shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  background: rgba(250, 249, 245, 0.72);
  border-bottom: 1px solid var(--line);
}

.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  height: 60px;
}

.brand-link {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.brand-mark {
  width: 30px;
  height: 30px;
  border-radius: 9px;
  object-fit: cover;
  box-shadow: 0 8px 18px rgba(54, 80, 46, 0.14);
}

.topbar-nav {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.nav-links a,
.lang-toggle {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.66);
  color: var(--muted);
  border-radius: 999px;
  padding: 9px 14px;
  font-size: 13px;
  line-height: 1;
  text-decoration: none;
  transition: border-color 0.2s ease, color 0.2s ease, background 0.2s ease;
}

.nav-links a:hover,
.lang-toggle:hover {
  color: var(--text);
  border-color: rgba(92, 181, 77, 0.38);
  background: rgba(255, 255, 255, 0.9);
}

.lang-toggle {
  cursor: pointer;
}

.hero {
  padding: 88px 0 28px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, 420px);
  gap: 38px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.76);
  border: 1px solid rgba(92, 181, 77, 0.16);
  color: #52704f;
  font-size: 13px;
  font-weight: 600;
}

.hero h1 {
  margin: 18px 0 14px;
  font-size: clamp(40px, 6vw, 64px);
  line-height: 0.98;
  letter-spacing: -0.05em;
}

html[lang="zh-CN"] .hero h1 {
  font-size: clamp(34px, 4.9vw, 48px);
}

.hero p.lead {
  margin: 0;
  max-width: 700px;
  font-size: 18px;
  color: var(--muted);
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 24px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: 999px;
  padding: 13px 18px;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.button:hover {
  transform: translateY(-1px);
}

.button-primary {
  background: var(--text);
  color: white;
  box-shadow: 0 16px 30px rgba(22, 33, 24, 0.15);
}

.button-secondary {
  background: rgba(255, 255, 255, 0.78);
  color: var(--text);
  border: 1px solid var(--line);
}

.hero-card {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.92), rgba(255, 255, 255, 0.82));
  border: 1px solid rgba(255, 255, 255, 0.76);
  border-radius: 32px;
  padding: 26px;
  box-shadow: var(--shadow);
}

.hero-card-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 18px;
}

.hero-app-icon {
  width: 74px;
  height: 74px;
  border-radius: 18px;
  object-fit: cover;
  box-shadow: 0 14px 28px rgba(54, 80, 46, 0.16);
}

.hero-card h2 {
  margin: 0 0 6px;
  font-size: 26px;
  letter-spacing: -0.03em;
}

html[lang="zh-CN"] .hero-card h2 {
  font-size: 23px;
}

.hero-card p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
}

.stat-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 18px;
}

.stat {
  padding: 16px;
  border-radius: 18px;
  background: rgba(245, 247, 242, 0.88);
  border: 1px solid rgba(22, 33, 24, 0.05);
}

.stat strong {
  display: block;
  margin-bottom: 4px;
  font-size: 15px;
}

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

.app-store-block {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.app-store-copy {
  display: grid;
  gap: 4px;
  color: var(--text);
  text-decoration: none;
}

.app-store-copy strong {
  font-size: 16px;
  letter-spacing: -0.02em;
}

.app-store-copy span {
  color: var(--muted);
  font-size: 13px;
}

.qr-link {
  display: grid;
  justify-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.2;
  text-align: center;
  text-decoration: none;
}

.qr-link img {
  width: 96px;
  height: 96px;
  padding: 6px;
  border-radius: 14px;
  background: white;
  border: 1px solid var(--line);
}

.section {
  padding: 34px 0;
}

.section-title {
  margin: 0 0 10px;
  font-size: clamp(28px, 4vw, 42px);
  letter-spacing: -0.04em;
  line-height: 1.02;
}

html[lang="zh-CN"] .section-title {
  font-size: clamp(26px, 3.5vw, 36px);
}

.section-lead {
  margin: 0;
  max-width: 760px;
  font-size: 17px;
  color: var(--muted);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 28px;
}

.feature-card,
.content-card,
.faq-item,
.link-card {
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid rgba(22, 33, 24, 0.06);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.feature-card {
  padding: 22px;
}

.feature-card .label {
  display: inline-flex;
  align-items: center;
  padding: 6px 10px;
  border-radius: 999px;
  background: var(--brand-soft);
  color: #487544;
  font-size: 12px;
  font-weight: 700;
  margin-bottom: 14px;
}

.feature-card h3 {
  margin: 0 0 10px;
  font-size: 21px;
  line-height: 1.1;
  letter-spacing: -0.03em;
}

html[lang="zh-CN"] .feature-card h3 {
  font-size: 19px;
}

.feature-card p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
}

.showcase-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 28px;
}

.shot-card {
  padding: 16px;
  border-radius: var(--radius-xl);
  background: rgba(255, 255, 255, 0.64);
  border: 1px solid rgba(22, 33, 24, 0.05);
}

.shot-card img {
  border-radius: 22px;
  width: 100%;
  height: auto;
  aspect-ratio: 720 / 1559;
  box-shadow: 0 10px 26px rgba(22, 33, 24, 0.1);
}

.shot-card h3 {
  margin: 14px 0 6px;
  font-size: 17px;
  letter-spacing: -0.02em;
}

html[lang="zh-CN"] .shot-card h3 {
  font-size: 16px;
}

.shot-card p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.split-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 20px;
  margin-top: 28px;
}

.content-card,
.link-card {
  padding: 24px;
}

.content-card h2,
.link-card h2,
.faq-item h3 {
  margin: 0 0 12px;
  font-size: 24px;
  letter-spacing: -0.03em;
}

html[lang="zh-CN"] .content-card h2,
html[lang="zh-CN"] .link-card h2,
html[lang="zh-CN"] .faq-item h3 {
  font-size: 22px;
}

.content-card p,
.content-card li,
.link-card p,
.faq-item p,
.faq-item li {
  color: var(--muted);
  font-size: 15px;
}

.content-card ul,
.faq-item ul {
  margin: 0;
  padding-left: 20px;
}

.content-card li,
.faq-item li {
  margin-bottom: 8px;
}

.faq-list {
  display: grid;
  gap: 14px;
}

.faq-item {
  padding: 22px;
}

.inline-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.inline-links a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid var(--line);
  color: var(--text);
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
}

.page-hero {
  padding: 86px 0 18px;
}

.page-hero .meta {
  margin-top: 10px;
  color: var(--muted);
  font-size: 14px;
}

.page-content {
  flex: 1;
  padding: 12px 0 56px;
}

.page-content .content-card {
  margin-top: 18px;
}

.footer {
  padding: 28px 0 42px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.footer-links {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.footer-links a {
  text-decoration: none;
  color: var(--muted);
}

.footer-links a:hover {
  color: var(--text);
}

@media (max-width: 900px) {
  .hero-grid,
  .split-grid,
  .feature-grid,
  .showcase-grid {
    grid-template-columns: 1fr;
  }

  .stat-list {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .container {
    width: min(var(--max-width), calc(100% - 28px));
  }

  .topbar-inner {
    height: auto;
    padding: 12px 0;
    align-items: flex-start;
    flex-direction: column;
  }

  .hero {
    padding-top: 64px;
  }

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

  html[lang="zh-CN"] .hero h1 {
    font-size: 31px;
  }

  html[lang="zh-CN"] .section-title {
    font-size: 30px;
  }

  .hero p.lead,
  .section-lead {
    font-size: 16px;
  }

  .content-card,
  .link-card,
  .feature-card,
  .faq-item,
  .shot-card {
    padding: 18px;
  }

  .app-store-block {
    align-items: stretch;
  }

  .qr-link {
    display: none;
  }
}