:root {
  --site-bg: #f8f6f3;
  --site-surface: #ffffff;
  --site-text: #1c1c1e;
  --site-muted: #6b6b70;
  --site-primary: #c45c4a;
  --site-primary-dark: #a84838;
  --site-accent: #d4a574;
  --site-border: rgba(28, 28, 30, 0.08);
  --site-shadow: 0 12px 40px rgba(28, 28, 30, 0.08);
  --site-radius: 16px;
  --site-max: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--site-text);
  background: var(--site-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
  background: rgba(248, 246, 243, 0.88);
  border-bottom: 1px solid var(--site-border);
}

.site-header-inner,
.site-section,
.site-footer-inner {
  max-width: var(--site-max);
  margin: 0 auto;
  padding: 0 24px;
}

.site-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.site-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 20px;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.site-brand-icon {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  object-fit: cover;
  flex-shrink: 0;
}

.site-nav {
  display: flex;
  gap: 28px;
  font-size: 15px;
  color: var(--site-muted);
}

.site-nav a:hover {
  color: var(--site-primary);
}

.site-hero {
  padding: 88px 0 40px;
}

.site-hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}

.site-eyebrow {
  display: inline-block;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(196, 92, 74, 0.1);
  color: var(--site-primary);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 20px;
}

.site-hero h1 {
  margin: 0 0 20px;
  font-size: 52px;
  line-height: 1.15;
  letter-spacing: -0.03em;
}

.site-hero p {
  margin: 0 0 32px;
  font-size: 18px;
  color: var(--site-muted);
  max-width: 520px;
}

.site-hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.site-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 148px;
  height: 48px;
  padding: 0 24px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

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

.site-btn-primary {
  background: var(--site-primary);
  color: #fff;
  box-shadow: 0 10px 24px rgba(196, 92, 74, 0.28);
}

.site-btn-primary:hover {
  background: var(--site-primary-dark);
}

.site-btn-secondary {
  background: var(--site-surface);
  color: var(--site-text);
  border: 1px solid var(--site-border);
}

.site-hero-card {
  background: var(--site-surface);
  border: 1px solid var(--site-border);
  border-radius: 28px;
  padding: 32px;
  box-shadow: var(--site-shadow);
}

.site-hero-card h3 {
  margin: 0 0 12px;
  font-size: 22px;
}

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

.site-hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 28px;
}

.site-stat {
  padding: 16px;
  border-radius: 14px;
  background: var(--site-bg);
}

.site-stat strong {
  display: block;
  font-size: 18px;
  margin-bottom: 4px;
}

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

.site-section {
  padding: 56px 0;
}

.site-section-compact {
  padding-top: 32px;
  padding-bottom: 48px;
}

.site-section-title {
  text-align: center;
  margin-bottom: 40px;
}

.site-section-title-left {
  text-align: left;
  margin-bottom: 24px;
}

.site-section-title h2 {
  margin: 0 0 12px;
  font-size: 36px;
  letter-spacing: -0.02em;
}

.site-section-title p {
  margin: 0;
  color: var(--site-muted);
  font-size: 16px;
}

.site-features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.site-feature {
  background: var(--site-surface);
  border: 1px solid var(--site-border);
  border-radius: var(--site-radius);
  padding: 28px;
  box-shadow: 0 4px 20px rgba(28, 28, 30, 0.04);
}

.site-feature-icon {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: rgba(196, 92, 74, 0.1);
  color: var(--site-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  margin-bottom: 18px;
}

.site-feature h3 {
  margin: 0 0 10px;
  font-size: 20px;
}

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

.site-download-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.site-download-card {
  background: var(--site-surface);
  border: 1px solid var(--site-border);
  border-radius: 24px;
  padding: 28px;
  box-shadow: var(--site-shadow);
  display: flex;
  flex-direction: column;
  min-height: 320px;
}

.site-download-card h3 {
  margin: 0 0 8px;
  font-size: 24px;
}

.site-platform-badge {
  display: inline-block;
  margin-bottom: 16px;
  font-size: 13px;
  color: var(--site-muted);
}

.site-download-meta {
  flex: 1;
  margin: 0 0 24px;
  color: var(--site-muted);
  font-size: 14px;
}

.site-download-meta p {
  margin: 0 0 8px;
}

.site-download-meta .version {
  color: var(--site-text);
  font-weight: 600;
}

.site-download-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 48px;
  padding: 0 24px;
  border: none;
  border-radius: 999px;
  background: var(--site-primary);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.2;
  text-align: center;
  cursor: pointer;
  transition: background 0.2s ease, opacity 0.2s ease;
  flex-shrink: 0;
  margin-top: auto;
}

.site-download-btn:hover:not(:disabled) {
  background: var(--site-primary-dark);
}

.site-download-btn:disabled,
.site-download-btn.is-disabled {
  background: #d8d8dc;
  cursor: not-allowed;
}

.site-download-btn.is-store {
  background: #1c1c1e;
}

.site-download-btn.is-store:hover:not(:disabled) {
  background: #000;
}

.site-about-wrap {
  padding: 48px 24px 64px;
  max-width: calc(var(--site-max) + 48px);
  margin: 0 auto;
}

.site-about-panel {
  background: var(--site-surface);
  border: 1px solid var(--site-border);
  border-radius: 28px;
  padding: 48px 40px;
  box-shadow: var(--site-shadow);
}

.site-about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

.site-about-copy {
  padding: 0 8px;
}

.site-about p {
  margin: 0 0 14px;
  color: var(--site-muted);
  font-size: 16px;
}

.site-footer {
  padding: 32px 0 48px;
  color: var(--site-muted);
  font-size: 14px;
  border-top: 1px solid var(--site-border);
  background: rgba(255, 255, 255, 0.5);
}

.site-footer-inner {
  display: block;
}

.site-footer-legal {
  text-align: center;
}

.site-footer-copy {
  margin: 0 0 8px;
  color: var(--site-text);
  font-size: 14px;
}

.site-footer-icp {
  margin: 0 0 8px;
  font-size: 13px;
}

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

.site-footer-icp a:hover {
  color: var(--site-primary);
  text-decoration: underline;
}

.site-footer-links {
  margin: 0 0 8px;
  font-size: 13px;
}

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

.site-footer-links a:hover {
  color: var(--site-primary);
  text-decoration: underline;
}

.site-footer-links span {
  margin: 0 8px;
  color: var(--site-border);
}

.site-footer-product {
  margin: 0;
  font-size: 13px;
  color: var(--site-muted);
}

@media (max-width: 960px) {
  .site-hero-grid,
  .site-features,
  .site-download-grid,
  .site-about-grid {
    grid-template-columns: 1fr;
  }

  .site-about-panel {
    padding: 32px 24px;
  }

  .site-about-copy {
    padding: 0;
  }

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

  .site-nav {
    display: none;
  }
}