:root {
  --bg: #f9f9fb;
  --card: #ffffff;
  --card-soft: rgba(255, 255, 255, 0.78);
  --border: #e2e8f0;
  --title-bg: #f9fafb;
  --primary: #7a80ff;
  --primary-deep: #5f67ff;
  --primary-strong: #2a3782;
  --text: #4d525e;
  --body: #7e828c;
  --muted: #a1a1a1;
  --shadow: 0 18px 60px rgba(42, 55, 130, 0.08);
  --radius-xl: 28px;
  --radius-lg: 20px;
  --radius-md: 16px;
  --container: 1180px;
}

* { box-sizing: border-box; }
html, body {
  margin: 0;
  min-height: 100%;
  background:
    radial-gradient(circle at top left, rgba(122, 128, 255, 0.12), transparent 34%),
    radial-gradient(circle at top right, rgba(122, 128, 255, 0.08), transparent 24%),
    linear-gradient(180deg, #fbfcff 0%, var(--bg) 100%);
  color: var(--text);
  font-family: "Microsoft YaHei", "PingFang SC", sans-serif;
}
a { color: inherit; text-decoration: none; }
button, input, textarea { font: inherit; }

.header-inner,
.page-section,
.footer-inner { width: min(calc(100% - 48px), var(--container)); margin: 0 auto; }

.marketing-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(20px);
  background: rgba(249, 249, 251, 0.82);
  border-bottom: 1px solid rgba(226, 232, 240, 0.9);
}

.header-inner {
  min-height: 84px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand-lockup, .header-actions, .hero-actions, .toolbar, .auth-links {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.brand-mark, .icon-orb {
  display: grid;
  place-items: center;
  color: #fff;
  background: linear-gradient(145deg, #b8bcff 0%, #7a80ff 55%, #6a6ffd 100%);
  box-shadow: 0 12px 30px rgba(122, 128, 255, 0.35);
}
.brand-mark { width: 48px; height: 48px; border-radius: 18px; font-size: 22px; font-weight: 700; }
.icon-orb { width: 72px; height: 72px; border-radius: 24px; font-size: 30px; }

.brand-copy strong { display: block; color: var(--primary-strong); font-size: 22px; line-height: 1.1; }
.brand-copy span { color: var(--body); font-size: 13px; }

.top-nav { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.nav-link, .lang-link {
  padding: 12px 16px;
  border-radius: 999px;
  color: var(--text);
  font-weight: 600;
  transition: 160ms ease;
}
.nav-link:hover, .lang-link:hover { color: var(--primary-strong); background: rgba(122, 128, 255, 0.08); }

.btn, .channel-btn, .input {
  min-height: 40px;
  border-radius: 14px;
  border: 1px solid var(--border);
}

.btn {
  padding: 0 18px;
  background: #fff;
  color: var(--primary-strong);
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  cursor: pointer;
  transition: 180ms ease;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); box-shadow: 0 10px 20px rgba(122, 128, 255, 0.1); }
.btn-primary { background: linear-gradient(135deg, #b2b6ff 0%, var(--primary) 55%, var(--primary-deep) 100%); color: #fff; border-color: #878ad3; }
.btn-secondary { background: #fff; color: #bcbef9; border-color: #aeb0d7; }
.btn-ghost { background: transparent; }

.user-chip {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: #fff;
  cursor: pointer;
}
.user-chip strong { color: var(--primary-strong); }
.user-area { position: relative; }
.user-menu {
  position: absolute;
  right: 0;
  top: calc(100% + 12px);
  width: 280px;
  padding: 16px;
  border-radius: 20px;
  border: 1px solid var(--border);
  background: #fff;
  box-shadow: var(--shadow);
  display: grid;
  gap: 12px;
}
.user-menu[hidden] { display: none; }

.hero, .section-stack { padding: 48px 0; }
.hero-grid, .download-layout, .membership-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, 0.85fr);
  gap: 24px;
}
.hero-side, .download-card, .field, .payment-card, .record-grid, .pricing-grid, .faq-grid, .section-grid, .membership-metrics { display: grid; gap: 18px; }
.hero-side { gap: 16px; }
.pricing-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.faq-grid, .record-grid { grid-template-columns: 1fr; }
.section-grid, .membership-metrics, .inline-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); display:grid; gap:16px; }

.hero-card, .info-card, .pricing-card, .faq-item, .section-card, .status-card, .auth-card, .mini-panel, .feature-card, .record-card, .payment-card, .download-placeholder {
  background: var(--card-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.hero-card, .section-card, .info-card, .status-card, .pricing-card, .auth-card { padding: 20px; }
.mini-panel, .feature-card, .faq-item, .record-card, .payment-card { padding: 22px; background:#fff; }

.card-title-bar {
  height: 50px;
  border-radius: 18px;
  background: var(--title-bg);
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 0 18px;
  margin-bottom: 16px;
}
.card-title-accent { width: 10px; height: 28px; border-radius: 999px; background: linear-gradient(180deg, #9aa0ff 0%, var(--primary) 100%); flex: 0 0 auto; }
.card-title-text { color: var(--primary-strong); font-size: 24px; font-weight: 700; }

.hero-badge {
  display: inline-flex;
  padding: 8px 14px;
  border-radius: 999px;
  background: rgba(122, 128, 255, 0.12);
  color: var(--primary);
  font-size: 13px;
  font-weight: 700;
  margin-bottom: 18px;
}
.hero-headline { color: var(--primary-strong); font-size: clamp(34px, 5vw, 58px); line-height: 1.1; margin: 0 0 18px; }
.hero-copy, .support-text, .muted-text, .feature-card p, .faq-item p, .payment-card p, .pricing-card p, .record-card p {
  color: var(--body);
  line-height: 1.8;
}
.support-text { font-size: 16px; }
.muted-text { font-size: 13px; }

.feature-card h3, .pricing-card h3, .faq-item h3, .payment-card h3, .mini-panel strong {
  margin: 0 0 10px;
  color: var(--primary-strong);
  font-size: 24px;
  line-height: 1.2;
}
.mini-panel strong { display:block; margin-bottom:8px; }
.price-line, .metric-value { color: var(--primary); font-size: 28px; font-weight: 800; }
.bullet-list { margin: 0; padding-left: 20px; color: var(--body); display: grid; gap: 10px; line-height: 1.7; }

.download-placeholder {
  display: grid;
  place-items: center;
  min-height: 260px;
  border-style: dashed;
  text-align: center;
  padding: 24px;
}
.download-placeholder strong { display:block; color: var(--primary-strong); font-size: 24px; margin-top: 12px; }
.download-placeholder span { color: var(--body); margin-top: 8px; }

.metric {
  padding: 18px;
  border-radius: 18px;
  border: 1px solid var(--border);
  background: #fff;
}
.metric-label { display: block; color: var(--muted); font-size: 14px; margin-bottom: 8px; }

.value-box, .status-box {
  border: 1px solid var(--border);
  border-radius: 18px;
  background: #fff;
  padding: 16px;
  min-height: 54px;
  color: var(--text);
  line-height: 1.7;
}

.field label { color: var(--primary-strong); font-weight: 700; }
.input, .textarea {
  width: 100%;
  background: #fff;
  color: var(--text);
  padding: 0 14px;
}
.textarea { min-height: 124px; resize: vertical; padding: 14px; border-radius: 16px; border:1px solid var(--border); }
.input:focus, .textarea:focus { outline: 2px solid rgba(122,128,255,0.16); border-color: #98a0ff; }

.channel-row { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 12px; }
.channel-btn { background: #fff; color: var(--primary-strong); font-weight: 700; cursor: pointer; }
.channel-btn.is-active { border-color: #878ad3; background: rgba(122, 128, 255, 0.1); }
.payment-link { word-break: break-all; }

.footer { padding: 16px 0 32px; }
.footer-inner { display: flex; justify-content: space-between; gap: 20px; color: var(--muted); font-size: 13px; }

.auth-modal {
  position: fixed;
  inset: 0;
  z-index: 60;
  display: grid;
  place-items: center;
  padding: 24px;
  background: rgba(15, 22, 45, 0.35);
  backdrop-filter: blur(10px);
}
.auth-card { width: min(100%, 560px); padding: 34px 34px 28px; position: relative; }
.modal-close {
  position: absolute;
  top: 18px;
  right: 18px;
  width: 40px;
  height: 40px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--body);
  cursor: pointer;
}
.auth-head { display: grid; justify-items: center; gap: 14px; margin-bottom: 24px; }
.auth-head h2 { margin: 0; color: var(--primary-strong); font-size: 22px; }
.auth-form { display: grid; gap: 16px; }
.auth-note { color: var(--muted); font-size: 13px; text-align: center; }
.link-btn { background:none; border:none; color:var(--primary); font-weight:700; cursor:pointer; padding:0; }

.toast-host {
  position: fixed;
  right: 24px;
  bottom: 24px;
  display: grid;
  gap: 12px;
  z-index: 80;
}
.toast {
  min-width: 260px;
  max-width: 360px;
  padding: 14px 16px;
  border-radius: 16px;
  background: #fff;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  color: var(--text);
}
.empty-state {
  color: var(--body);
  padding: 18px;
  border-radius: 18px;
  background: #fff;
  border: 1px dashed var(--border);
}

@media (max-width: 1040px) {
  .hero-grid, .download-layout, .membership-layout, .pricing-grid { grid-template-columns: 1fr; }
  .header-inner { padding: 12px 0; flex-wrap: wrap; }
}
@media (max-width: 720px) {
  .header-inner, .page-section, .footer-inner { width: min(calc(100% - 28px), var(--container)); }
  .top-nav { width: 100%; overflow-x: auto; padding-bottom: 4px; }
  .section-grid, .channel-row, .inline-grid, .membership-metrics { grid-template-columns: 1fr; }
  .hero-actions, .header-actions, .toolbar { width: 100%; }
  .btn { width: 100%; }
  .footer-inner { flex-direction: column; }
}