:root {
  --bg: #f5f7f2;
  --surface: #ffffff;
  --surface-alt: #eef2eb;
  --ink: #102116;
  --muted: #5a685d;
  --line: rgba(16, 33, 22, 0.12);
  --brand: #1f6b47;
  --brand-dark: #143623;
  --brand-soft: rgba(31, 107, 71, 0.1);
  --shadow: 0 18px 40px rgba(15, 34, 22, 0.08);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: linear-gradient(180deg, #122218 0%, #122218 500px, var(--bg) 500px, var(--bg) 100%);
  color: var(--ink);
  font: 16px/1.6 "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  overflow-x: hidden;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
.container { width: min(1180px, calc(100% - 32px)); margin: 0 auto; }
.skip-link {
  position: absolute; left: 16px; top: 8px; z-index: 1000;
  padding: 10px 14px; background: #fff; border-radius: 999px;
  transform: translateY(-180%); transition: transform .2s ease;
}
.skip-link:focus { transform: translateY(0); }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

.site-header {
  position: sticky; top: 0; z-index: 80;
  backdrop-filter: blur(14px);
  background: rgba(18, 34, 24, .84);
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.header-inner {
  min-height: 74px;
  display: flex; align-items: center; justify-content: space-between; gap: 18px;
}
.brand-wordmark { height: 28px; width: auto; }
.menu-toggle {
  display: none; border: 0; background: transparent; padding: 10px; cursor: pointer;
}
.menu-toggle span {
  display: block; width: 24px; height: 2px; margin: 4px 0; background: #fff; border-radius: 999px;
}
.site-nav { display: flex; align-items: center; gap: 18px; color: rgba(255,255,255,.88); }
.site-nav a { font-size: 14px; }
.site-nav .nav-cta {
  padding: 11px 16px; border-radius: 999px; color: #fff; background: var(--brand);
  font-weight: 600;
}

.hero { padding: 54px 0 38px; color: #fff; }
.hero-copy { text-align: center; max-width: 820px; margin: 0 auto; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  margin: 0 0 16px; padding: 7px 14px; border-radius: 999px;
  background: rgba(255,255,255,.08); color: rgba(255,255,255,.88);
  font-size: 13px; letter-spacing: .02em;
}
h1 {
  margin: 0; font-size: clamp(34px, 4vw, 56px); line-height: 1.08;
  letter-spacing: -0.03em; word-break: keep-all; overflow-wrap: normal; max-width: 14em;
  margin-inline: auto;
}
.hero-lead {
  margin: 16px auto 0; max-width: 760px; color: rgba(255,255,255,.82); font-size: 18px;
}
.hero-actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; margin-top: 24px; }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 48px; padding: 0 20px; border-radius: 999px; font-weight: 700;
  border: 1px solid transparent;
}
.btn-primary { background: #fff; color: var(--brand-dark); }
.btn-secondary { background: rgba(255,255,255,.08); color: #fff; border-color: rgba(255,255,255,.16); }

.hero-flow-rail {
  margin-top: 28px; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px;
}
.flow-step {
  padding: 18px; border-radius: 22px; background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.1); box-shadow: 0 18px 30px rgba(0,0,0,.1);
}
.flow-step.active { background: rgba(31,107,71,.22); border-color: rgba(129, 204, 156, .28); }
.flow-step span {
  display: inline-flex; align-items: center; justify-content: center;
  width: 34px; height: 34px; border-radius: 50%; background: rgba(255,255,255,.16);
  font-size: 13px; font-weight: 700;
}
.flow-step strong { display: block; margin: 12px 0 6px; font-size: 18px; }
.flow-step p { margin: 0; color: rgba(255,255,255,.76); }

.section { padding: 76px 0; }
.section-alt { background: var(--surface-alt); }
.section-head { max-width: 760px; margin-bottom: 28px; }
.section-kicker {
  margin: 0 0 10px; color: var(--brand); font-weight: 800; letter-spacing: .08em; text-transform: uppercase;
  font-size: 12px;
}
.section-head h2 { margin: 0; font-size: clamp(28px, 3vw, 42px); line-height: 1.15; }
.section-head p:last-child { margin: 12px 0 0; color: var(--muted); }

.device-layout { display: grid; grid-template-columns: 1.2fr .9fr; gap: 22px; align-items: center; }
.device-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.device-card {
  min-height: 170px; padding: 22px; border-radius: 24px; border: 1px solid var(--line);
  background: var(--surface); box-shadow: var(--shadow);
}
.device-card span { display: inline-flex; padding: 5px 10px; border-radius: 999px; background: var(--brand-soft); color: var(--brand); font-size: 12px; font-weight: 800; }
.device-card strong { display: block; margin: 14px 0 8px; font-size: 22px; }
.device-card p { margin: 0; color: var(--muted); }
.device-visual {
  margin: 0; padding: 18px; border-radius: 28px; background: linear-gradient(180deg, #fff, #eef5ef);
  border: 1px solid var(--line); box-shadow: var(--shadow);
}
.device-visual img { border-radius: 18px; }
.device-visual figcaption { margin-top: 12px; color: var(--muted); font-size: 14px; }

.timeline-list {
  margin: 0; padding: 0; list-style: none; display: grid; gap: 16px;
}
.timeline-list li {
  position: relative; padding: 20px 22px 20px 74px; background: var(--surface); border: 1px solid var(--line);
  border-radius: 24px; box-shadow: var(--shadow);
}
.timeline-list li::before {
  content: ""; position: absolute; left: 28px; top: 26px; width: 18px; height: 18px; border-radius: 50%;
  background: var(--brand); box-shadow: 0 0 0 8px var(--brand-soft);
}
.timeline-list strong { display: block; font-size: 20px; margin-bottom: 6px; }
.timeline-list p { margin: 0; color: var(--muted); }

.path-strip {
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px;
}
.path-card {
  padding: 22px; border-radius: 24px; border: 1px solid var(--line); background: var(--surface);
  box-shadow: var(--shadow);
}
.path-card strong { display: block; font-size: 20px; margin-bottom: 6px; }
.path-card p { margin: 0; color: var(--muted); }

.faq-list { display: grid; gap: 12px; }
.faq-item {
  background: var(--surface); border: 1px solid var(--line); border-radius: 22px; overflow: hidden; box-shadow: var(--shadow);
}
.faq-trigger {
  width: 100%; display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 18px 22px;
  border: 0; background: transparent; font: inherit; text-align: left; cursor: pointer; color: var(--ink);
}
.faq-icon { width: 18px; height: 18px; position: relative; flex: 0 0 18px; }
.faq-icon::before, .faq-icon::after {
  content: ""; position: absolute; inset: 50% auto auto 50%; transform: translate(-50%, -50%);
  background: var(--brand-dark); border-radius: 999px;
}
.faq-icon::before { width: 18px; height: 2px; }
.faq-icon::after { width: 2px; height: 18px; transition: opacity .2s ease; }
.faq-item[aria-expanded="true"] .faq-icon::after { opacity: 0; }
.faq-panel { padding: 0 22px 18px; color: var(--muted); }

.site-footer {
  padding: 34px 0 42px; background: #0f1f15; color: rgba(255,255,255,.88);
  border-top: 1px solid rgba(255,255,255,.08);
}
.footer-grid {
  display: grid; grid-template-columns: 1.2fr 1fr .8fr; gap: 24px; align-items: start;
}
.footer-logo { width: 132px; height: auto; margin-bottom: 14px; }
.footer-brand p { margin: 0; color: rgba(255,255,255,.68); }
.footer-columns { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.footer-columns h3 { margin: 0 0 10px; font-size: 16px; }
.footer-columns a { display: block; color: rgba(255,255,255,.72); margin-top: 8px; }
.footer-cta {
  display: inline-flex; align-items: center; justify-content: center; min-height: 46px;
  padding: 0 18px; border-radius: 999px; background: #fff; color: var(--brand-dark); font-weight: 800;
}
.footer-action p { margin: 12px 0 0; color: rgba(255,255,255,.68); }

@media (max-width: 980px) {
  .site-nav { display: none; position: absolute; left: 16px; right: 16px; top: 74px; flex-direction: column; padding: 16px; border-radius: 22px; background: #102016; border: 1px solid rgba(255,255,255,.08); }
  .site-nav.is-open { display: flex; }
  .menu-toggle { display: inline-flex; flex-direction: column; }
  .hero-flow-rail, .device-layout, .path-strip, .footer-grid { grid-template-columns: 1fr; }
  .footer-columns { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 720px) {
  .hero { padding-top: 38px; }
  .hero-actions, .footer-columns { grid-template-columns: 1fr; }
  .device-grid { grid-template-columns: 1fr; }
  .timeline-list li { padding-left: 22px; }
  .timeline-list li::before { position: static; display: inline-block; margin-bottom: 12px; }
  .footer-columns { grid-template-columns: 1fr; }
}