:root {
  --red: #d92b20;
  --red-dark: #b91f17;
  --ink: #101828;
  --muted: #667085;
  --line: #e4e8ef;
  --soft: #f6f8fb;
  --green: #0b8f53;
  --shadow: 0 24px 70px rgba(16, 24, 40, .1);
  color: var(--ink);
  font-family: "Microsoft YaHei UI", "PingFang SC", system-ui, sans-serif;
  font-synthesis: none;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; min-width: 320px; overflow-x: hidden; background: #fff; }
button, a { font: inherit; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; }

.site-header {
  position: sticky;
  z-index: 20;
  top: 0;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 32px;
  min-height: 72px;
  padding: 12px max(24px, calc((100vw - 1180px) / 2));
  border-bottom: 1px solid rgba(228, 232, 239, .9);
  background: rgba(255, 255, 255, .92);
  backdrop-filter: blur(18px);
}

.brand { display: flex; align-items: center; gap: 11px; width: max-content; }
.brand img { width: 38px; height: 38px; border-radius: 11px; }
.brand span { display: grid; gap: 1px; }
.brand strong { font-size: 16px; letter-spacing: -.02em; }
.brand small { color: var(--muted); font-size: 10px; }
.site-header nav { display: flex; gap: 34px; color: #475467; font-size: 13px; }
.site-header nav a:hover, .customer-link:hover { color: var(--red); }
.header-actions { display: flex; justify-content: flex-end; align-items: center; gap: 20px; }
.customer-link { color: #344054; font-size: 13px; font-weight: 700; }

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: 10px;
  font-weight: 800;
  font-size: 14px;
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
.button:hover { transform: translateY(-2px); }
.button-primary { color: #fff; background: linear-gradient(135deg, var(--red), var(--red-dark)); box-shadow: 0 12px 26px rgba(217, 43, 32, .22); }
.button-secondary { color: var(--ink); border-color: #d5dae3; background: #fff; }
.button-small { min-height: 40px; padding: 0 17px; font-size: 13px; }
.button-light { color: var(--red); background: #fff; }
.button-ghost { color: #fff; border-color: rgba(255, 255, 255, .4); background: transparent; }

.hero {
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  align-items: center;
  gap: clamp(40px, 7vw, 96px);
  width: min(1180px, calc(100% - 48px));
  min-height: 700px;
  margin: 0 auto;
  padding: 70px 0 80px;
}
.eyebrow { margin: 0 0 18px; color: var(--red); font-size: 12px; font-weight: 900; letter-spacing: .08em; }
.hero h1 { margin: 0; overflow-wrap: anywhere; font-size: clamp(42px, 4.5vw, 66px); line-height: 1.13; letter-spacing: -.055em; }
.hero h1 em { color: var(--red); font-style: normal; }
.hero-lead { max-width: 590px; margin: 25px 0 0; color: #475467; font-size: clamp(17px, 1.45vw, 20px); line-height: 1.75; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.quick-points { display: flex; flex-wrap: wrap; gap: 10px 24px; margin-top: 28px; color: #667085; font-size: 12px; }
.quick-points span::before { content: "✓"; margin-right: 6px; color: var(--red); font-weight: 900; }

.product-stage { position: relative; }
.product-stage::before { content: ""; position: absolute; inset: 10% -5% -8% 8%; border-radius: 50%; background: rgba(217, 43, 32, .08); filter: blur(45px); }
.product-window { position: relative; overflow: hidden; border: 1px solid #dce1e9; border-radius: 22px; background: #fff; box-shadow: var(--shadow); }
.window-bar { display: flex; justify-content: space-between; align-items: center; padding: 15px 18px; border-bottom: 1px solid var(--line); background: #fafbfc; }
.window-brand { display: flex; align-items: center; gap: 5px; font-size: 12px; font-weight: 800; }
.window-brand i { width: 8px; height: 8px; border-radius: 50%; background: #ff6b5f; }
.window-brand i:nth-child(2) { background: #ffbd47; }
.window-brand i:nth-child(3) { margin-right: 7px; background: #32bf6b; }
.status-pill { padding: 7px 10px; border-radius: 999px; color: var(--green); background: #dcf9e9; font-size: 11px; font-weight: 900; }
.window-body { padding: 28px; }
.window-kicker { margin: 0; color: var(--muted); font-size: 11px; }
.window-body h2 { margin: 7px 0 22px; font-size: 24px; }
.metric-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 9px; }
.metric-grid div { padding: 15px 10px; border: 1px solid var(--line); border-radius: 12px; background: var(--soft); text-align: center; }
.metric-grid span { display: block; color: var(--muted); font-size: 10px; }
.metric-grid strong { display: block; margin-top: 8px; font-size: 25px; }
.metric-grid .metric-result { border-color: #f3bbb6; background: #fff3f2; }
.metric-grid .metric-result strong { color: var(--red); }
.result-line { display: flex; justify-content: space-between; gap: 20px; margin-top: 16px; padding: 14px 16px; border-radius: 11px; background: #111827; color: #fff; font-size: 11px; }
.result-line span { color: #d0d5dd; }

.how-section, .pricing-section { padding: 100px max(24px, calc((100vw - 1060px) / 2)); }
.how-section { background: var(--soft); }
.section-heading { max-width: 720px; }
.section-heading h2 { margin: 0; font-size: clamp(32px, 4vw, 48px); line-height: 1.18; letter-spacing: -.045em; }
.center-heading { margin: 0 auto; text-align: center; }
.flow-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 38px; }
.flow-grid article { min-height: 170px; padding: 24px; border: 1px solid var(--line); border-radius: 18px; background: #fff; }
.flow-grid b { color: var(--red); font-size: 12px; }
.flow-grid h3 { margin: 34px 0 8px; font-size: 21px; }
.flow-grid p { margin: 0; color: var(--muted); font-size: 14px; }
.example-card { display: grid; grid-template-columns: 1.2fr 1fr 1.15fr; margin-top: 16px; overflow: hidden; border: 1px solid var(--line); border-radius: 18px; background: #fff; box-shadow: 0 14px 42px rgba(16, 24, 40, .05); }
.example-card > div { min-width: 0; padding: 24px; }
.example-card > div + div { border-left: 1px solid var(--line); }
.example-card span { display: block; margin-bottom: 13px; color: var(--muted); font-size: 11px; }
.example-card strong { font-size: 14px; line-height: 1.75; }
.example-signal div { display: flex; flex-wrap: wrap; gap: 6px; }
.example-signal b { padding: 6px 8px; border-radius: 7px; color: var(--red); background: #fff0ee; font-size: 10px; }

.pricing-section { background: #fff; }
.pricing-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 18px; max-width: 1160px; margin: 40px auto 0; }
.price-card { display: flex; flex-direction: column; padding: 30px; border: 1px solid var(--line); border-radius: 22px; background: #fff; }
.featured-card { border: 2px solid var(--red); box-shadow: 0 24px 70px rgba(217, 43, 32, .1); }
.plan-tag { align-self: flex-start; padding: 6px 9px; border-radius: 7px; color: var(--red); background: #ffefed; font-size: 10px; font-weight: 900; }
.price-card h3 { margin: 18px 0 0; font-size: 22px; }
.price { display: flex; align-items: baseline; gap: 7px; margin: 16px 0; }
.price strong { font-size: 42px; letter-spacing: -.05em; }
.price span, .price-card p { color: var(--muted); }
.price-card p { margin: 0; font-size: 13px; line-height: 1.65; }
.price-card .plan-detail { min-height: 44px; margin: 10px 0 22px; }
.facts-row { display: flex; justify-content: center; flex-wrap: wrap; gap: 8px 22px; max-width: 980px; margin: 26px auto 0; color: #667085; font-size: 11px; }
.facts-row span::before { content: "·"; margin-right: 6px; color: var(--red); }
.partner-note { display: flex; justify-content: space-between; gap: 24px; max-width: 980px; margin: 26px auto 0; padding: 18px 22px; border-radius: 14px; background: #f7f8fa; font-size: 12px; }
.partner-note span { color: var(--muted); }
.truth-note { margin: 18px 0 0; color: #98a2b3; text-align: center; font-size: 10px; }

.final-cta { display: grid; justify-items: center; margin: 0; padding: 92px 24px; text-align: center; color: #fff; background: radial-gradient(circle at 15% 0, #f4584e, transparent 34rem), #a91611; }
.final-cta .eyebrow { color: #ffd2ce; }
.final-cta h2 { margin: 0; font-size: clamp(38px, 5vw, 62px); letter-spacing: -.05em; }
.final-cta .hero-actions { margin-top: 28px; }

footer { display: grid; grid-template-columns: 1fr auto auto; align-items: center; gap: 28px; padding: 28px max(24px, calc((100vw - 1180px) / 2)); border-top: 1px solid var(--line); }
footer p { margin: 0; color: var(--muted); font-size: 11px; }

.trial-dialog { width: min(700px, calc(100% - 32px)); max-height: calc(100vh - 32px); overflow: auto; padding: 30px; border: 0; border-radius: 22px; box-shadow: 0 30px 100px rgba(16, 24, 40, .25); }
.trial-dialog::backdrop { background: rgba(16, 24, 40, .58); backdrop-filter: blur(5px); }
.trial-dialog h2 { margin: 0; font-size: 28px; }
.trial-dialog p, .trial-dialog li { color: var(--muted); line-height: 1.7; }
.trial-dialog ul { margin: 16px 0 22px; padding-left: 20px; }
.trial-contact { display: grid; grid-template-columns: minmax(180px, 230px) 1fr; align-items: center; gap: 28px; margin-top: 22px; }
.trial-contact img { display: block; width: 100%; border: 1px solid var(--line); border-radius: 16px; }
.trial-contact p { margin: 0 0 8px; }
.trial-contact p strong { color: var(--ink); }
.dialog-close { position: absolute; top: 13px; right: 13px; width: 38px; height: 38px; border: 0; border-radius: 50%; background: #f1f3f6; font-size: 23px; }

@media (max-width: 900px) {
  .site-header { grid-template-columns: 1fr auto; }
  .site-header nav { display: none; }
  .hero { grid-template-columns: 1fr; min-height: 0; padding: 72px 0; }
  .hero-copy { max-width: 700px; }
  .product-stage { max-width: 640px; }
  .example-card { grid-template-columns: 1fr; }
  .example-card > div + div { border-top: 1px solid var(--line); border-left: 0; }
  .partner-note { display: grid; gap: 7px; }
}

@media (max-width: 620px) {
  .site-header { min-height: 64px; padding: 10px 16px; }
  .brand img { width: 34px; height: 34px; }
  .brand small, .customer-link { display: none; }
  .button-small { min-height: 38px; padding: 0 13px; }
  .hero { width: calc(100% - 32px); padding: 54px 0 60px; }
  .hero h1 { font-size: clamp(34px, 10vw, 42px); }
  .hero-lead { font-size: 16px; }
  .hero-actions { display: grid; }
  .hero-actions .button { width: 100%; }
  .quick-points { display: grid; grid-template-columns: repeat(2, 1fr); }
  .window-body { padding: 20px; }
  .metric-grid { grid-template-columns: repeat(2, 1fr); }
  .result-line { display: grid; gap: 6px; }
  .how-section, .pricing-section { padding: 72px 16px; }
  .flow-grid, .pricing-grid { grid-template-columns: 1fr; }
  .flow-grid article { min-height: 138px; }
  .flow-grid h3 { margin-top: 22px; }
  .facts-row { justify-content: flex-start; }
  .final-cta { padding: 72px 18px; }
  footer { grid-template-columns: 1fr; gap: 12px; }
  .trial-contact { grid-template-columns: 1fr; }
  .trial-contact img { max-width: 230px; margin: 0 auto; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}