:root {
  color-scheme: light;
  --brand: #ff4f86;
  --brand-dark: #e23f72;
  --brand-soft: #ffe3ec;
  --ink: #1c1a24;
  --ink-soft: #6a6577;
  --bg: #fff7fa;
  --card: #ffffff;
  --border: #f1dbe3;
  --radius-lg: 22px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --shadow: 0 18px 40px -20px rgba(226, 63, 114, 0.35);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

.container {
  width: 100%;
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 20px;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: auto;
}
.skip-link:focus {
  left: 12px;
  top: 12px;
  background: #fff;
  padding: 8px 12px;
  border-radius: 8px;
  z-index: 999;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  height: 60px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--ink);
  text-decoration: none;
  font-weight: 700;
  font-size: 16px;
}
.brand img { width: 32px; height: 32px; border-radius: 9px; }
.main-nav {
  display: flex;
  gap: 20px;
  font-size: 14px;
}
.main-nav a {
  color: var(--ink-soft);
  text-decoration: none;
}
.main-nav a:hover { color: var(--brand); }
.nav-download {
  background: var(--brand);
  color: #fff;
  padding: 9px 16px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
}

/* Buttons */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 11px 20px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.button.primary { background: var(--brand); color: #fff; box-shadow: var(--shadow); }
.button.primary:hover { transform: translateY(-1px); }
.button.secondary { background: #fff; color: var(--brand); border-color: var(--brand-soft); }
.button.ghost { background: var(--brand-soft); color: var(--brand-dark); }
.button.full { width: 100%; }

/* Hero */
.hero {
  position: relative;
  overflow: hidden;
  padding: 32px 0 40px;
}
.hero-glow {
  position: absolute;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  filter: blur(50px);
  opacity: 0.45;
  z-index: 0;
}
.glow-one { background: #ff9ec2; top: -60px; left: -40px; }
.glow-two { background: #ffd4a3; bottom: -40px; right: -30px; }

.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 24px;
  align-items: start;
}
.badge {
  display: inline-block;
  background: var(--brand-soft);
  color: var(--brand-dark);
  font-size: 12px;
  font-weight: 600;
  padding: 5px 12px;
  border-radius: 999px;
  margin: 0 0 12px;
}
.hero-copy h1 {
  font-size: 30px;
  margin: 0 0 12px;
  line-height: 1.35;
}
.hero-copy h1 span { color: var(--brand); }
.hero-desc {
  color: var(--ink-soft);
  font-size: 14px;
  margin: 0 0 18px;
  max-width: 480px;
}
.hero-actions { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 16px; }
.quick-service {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  font-size: 13px;
  color: var(--ink-soft);
}
.quick-service button {
  border: 1px solid var(--border);
  background: #fff;
  color: var(--ink);
  border-radius: 999px;
  padding: 5px 12px;
  font-size: 12px;
  cursor: pointer;
}
.quick-service button:hover { border-color: var(--brand); color: var(--brand); }

.hero-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 22px 20px;
  text-align: center;
  box-shadow: var(--shadow);
}
.app-icon { margin: 0 auto 12px; border-radius: 26px; }
.hero-card h2 { margin: 0 0 4px; font-size: 18px; }
.hero-card p { margin: 0 0 14px; color: var(--ink-soft); font-size: 13px; }
.hero-card .button { margin-bottom: 8px; }
.hero-card small { display: block; color: var(--ink-soft); font-size: 11px; margin-top: 6px; }

/* Sections */
.section { padding: 36px 0; }
.section-head { max-width: 560px; margin: 0 0 24px; }
.section-head.center { margin: 0 auto 28px; text-align: center; }
.eyebrow {
  display: inline-block;
  color: var(--brand);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
  margin-bottom: 8px;
}
.section-head h2, .showcase-copy h2 { font-size: 22px; margin: 0 0 8px; }
.section-head p, .showcase-copy p { color: var(--ink-soft); font-size: 13px; margin: 0; }

.stats-section { padding: 20px 0; }
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  text-align: center;
}
.stats-grid > div {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 14px 8px;
}
.stats-grid strong { display: block; font-size: 18px; color: var(--brand-dark); }
.stats-grid span { font-size: 12px; color: var(--ink-soft); }

/* Showcase */
.showcase-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 24px;
  align-items: center;
}
.showcase-copy p { margin-bottom: 16px; }
.showcase-card {
  margin: 0;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 10px;
  box-shadow: var(--shadow);
}
.showcase-card img { border-radius: var(--radius-md); }
.showcase-card figcaption {
  font-size: 11px;
  color: var(--ink-soft);
  text-align: center;
  padding-top: 8px;
}

/* Install steps */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-bottom: 20px;
}
.steps article {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 16px;
}
.steps b {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--brand-soft);
  color: var(--brand-dark);
  font-size: 13px;
  margin-bottom: 8px;
}
.steps h3 { font-size: 14px; margin: 0 0 6px; }
.steps p { font-size: 12px; color: var(--ink-soft); margin: 0; }
.install-actions { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }

/* Service */
.service-section { background: #fff; border-top: 1px solid var(--border); }
.service-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  align-items: center;
}
.service-wrap h2 { font-size: 20px; margin: 0 0 6px; }
.service-wrap p { color: var(--ink-soft); font-size: 13px; margin: 0; }
.wechat-list { display: grid; gap: 10px; }
.wechat-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 12px 16px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: var(--bg);
  cursor: pointer;
  text-align: left;
}
.wechat-card.preferred { border-color: var(--brand); background: var(--brand-soft); }
.wechat-card span { font-size: 11px; color: var(--ink-soft); display: block; }
.wechat-card strong { font-size: 15px; }
.wechat-card em {
  font-style: normal;
  font-size: 12px;
  color: var(--brand-dark);
  background: #fff;
  padding: 4px 10px;
  border-radius: 999px;
}

/* Footer */
.site-footer { padding: 24px 0 90px; }
.footer-grid {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 14px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border);
}
.footer-brand { display: flex; align-items: center; gap: 10px; }
.footer-brand img { border-radius: 9px; }
.footer-brand strong { display: block; font-size: 14px; }
.footer-brand span { font-size: 12px; color: var(--ink-soft); }
.footer-links { display: flex; gap: 16px; font-size: 13px; }
.footer-links a { color: var(--ink-soft); text-decoration: none; }
.footer-bottom { padding-top: 14px; font-size: 12px; color: var(--ink-soft); text-align: center; }

/* Mobile bar */
.mobile-bar {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 50;
  display: none;
  background: #fff;
  border-top: 1px solid var(--border);
  padding: 10px 14px calc(10px + env(safe-area-inset-bottom));
  gap: 10px;
}
.mobile-bar a {
  flex: 1;
  text-align: center;
  padding: 10px 0;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  text-decoration: none;
}
.mobile-bar a:first-child { background: var(--brand-soft); color: var(--brand-dark); }
.mobile-bar a:last-child { background: var(--brand); color: #fff; }

/* Modal */
.modal { position: fixed; inset: 0; z-index: 60; display: none; align-items: center; justify-content: center; padding: 20px; }
.modal.open { display: flex; }
.modal-backdrop { position: absolute; inset: 0; background: rgba(28, 26, 36, 0.5); }
.modal-card {
  position: relative;
  z-index: 1;
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 24px 20px;
  max-width: 300px;
  width: 100%;
  text-align: center;
}
.modal-card img:first-child { margin: 0 auto 8px; border-radius: 12px; }
.modal-card h2 { font-size: 16px; margin: 0 0 4px; }
.modal-card p { font-size: 12px; color: var(--ink-soft); margin: 0 0 14px; }
.modal-qr { margin: 0 0 14px; }
.modal-qr img { margin: 0 auto; border: 1px solid var(--border); border-radius: 10px; }
.modal-card a { font-size: 12px; color: var(--brand); text-decoration: none; }
.modal-close {
  position: absolute;
  top: 10px;
  right: 10px;
  border: none;
  background: var(--bg);
  width: 28px;
  height: 28px;
  border-radius: 50%;
  font-size: 16px;
  cursor: pointer;
  color: var(--ink-soft);
}

/* Toast */
.toast {
  position: fixed;
  left: 50%;
  bottom: 90px;
  transform: translateX(-50%) translateY(10px);
  background: rgba(28, 26, 36, 0.9);
  color: #fff;
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 12px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
  z-index: 70;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* Responsive */
@media (max-width: 860px) {
  .hero-grid, .showcase-grid, .service-wrap { grid-template-columns: 1fr; }
  .showcase-card { order: -1; }
  .steps { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 600px) {
  .container { padding: 0 16px; }
  .main-nav { display: none; }
  .nav-wrap { height: 52px; }
  .nav-download { padding: 7px 12px; font-size: 12px; }
  .hero { padding: 20px 0 24px; }
  .badge { font-size: 11px; padding: 4px 10px; }
  .hero-copy h1 { font-size: 22px; }
  .hero-desc { font-size: 13px; }
  .hero-actions .button { padding: 9px 16px; font-size: 13px; }
  .hero-card { padding: 18px 16px; }
  .app-icon { width: 88px !important; height: 88px !important; }
  .section { padding: 24px 0; }
  .section-head h2, .showcase-copy h2 { font-size: 18px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: 1fr; gap: 10px; }
  .service-wrap { text-align: center; }
  .footer-grid { justify-content: center; text-align: center; }
  .footer-links { justify-content: center; flex-wrap: wrap; }
  .mobile-bar { display: flex; }
  .site-footer { padding-bottom: 96px; }
}