@font-face {
  font-family: Inter;
  font-style: normal;
  font-weight: 400 700;
  font-display: swap;
  src: url(/fonts/inter-latin.woff2) format("woff2");
}

:root {
  --ink: #0a1628;
  --ink-soft: #1a2b45;
  --muted: #5c6b7f;
  --muted-2: #8a97a8;
  --line: #e4e9f0;
  --line-strong: #d0d8e4;
  --paper: #f6f7f9;
  --paper-warm: #fafbfc;
  --card: #ffffff;
  --navy: #0f2a4a;
  --blue: #1b4f8a;
  --teal: #14b8a6;
  --teal-soft: #e6faf7;
  --teal-hover: #0d9488;
  --shadow-sm: 0 1px 2px rgba(10, 22, 40, 0.04);
  --shadow-md: 0 8px 30px rgba(10, 22, 40, 0.06);
  --radius: 14px;
  --header-h: 68px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.65;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--blue);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}
a:hover { color: var(--teal-hover); }

.wrap {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 28px;
}

/* —— Header —— */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-h);
  border-bottom: 1px solid rgba(228, 233, 240, 0.85);
  background: rgba(246, 247, 249, 0.78);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
}
.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  height: 100%;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--ink);
  flex-shrink: 0;
}
.brand:hover { color: var(--ink); }
.brand-logo {
  height: 28px;
  width: auto;
  display: block;
}
.brand-icon {
  height: 28px;
  width: 28px;
  display: block;
}
.brand-word {
  font-weight: 650;
  font-size: 15px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink);
}
.nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 22px;
  font-size: 14px;
}
.nav a {
  color: var(--muted);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.15s ease;
}
.nav a:hover { color: var(--ink); }
.nav-cta {
  display: inline-flex;
  align-items: center;
  padding: 8px 14px;
  border-radius: 999px;
  background: var(--ink);
  color: #f4f7fb !important;
  font-weight: 600 !important;
  font-size: 13px;
  letter-spacing: -0.01em;
  transition: background 0.15s ease, transform 0.15s ease;
}
.nav-cta:hover {
  background: var(--navy);
  color: #fff !important;
}

/* —— Hero —— */
.hero {
  position: relative;
  padding: 88px 0 64px;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 70% 55% at 70% -10%, rgba(20, 184, 166, 0.12), transparent 60%),
    radial-gradient(ellipse 50% 40% at 10% 20%, rgba(27, 79, 138, 0.08), transparent 55%),
    linear-gradient(180deg, var(--paper-warm) 0%, var(--paper) 100%);
  pointer-events: none;
  z-index: 0;
}
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(10, 22, 40, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(10, 22, 40, 0.03) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: linear-gradient(180deg, rgba(0,0,0,0.35), transparent 85%);
  -webkit-mask-image: linear-gradient(180deg, rgba(0,0,0,0.35), transparent 85%);
  pointer-events: none;
  z-index: 0;
}
.hero .wrap { position: relative; z-index: 1; }
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 20px;
  padding: 5px 12px 5px 8px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.7);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
}
.eyebrow-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--teal);
  box-shadow: 0 0 0 3px var(--teal-soft);
}
.hero h1 {
  margin: 0 0 20px;
  max-width: 16ch;
  font-size: clamp(36px, 6vw, 56px);
  line-height: 1.08;
  letter-spacing: -0.045em;
  font-weight: 700;
  color: var(--ink);
}
.lede {
  margin: 0 0 32px;
  max-width: 54ch;
  color: var(--muted);
  font-size: clamp(17px, 2vw, 19px);
  line-height: 1.6;
}
.actions { display: flex; flex-wrap: wrap; gap: 12px; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 22px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 14px;
  letter-spacing: -0.01em;
  text-decoration: none;
  border: 1px solid transparent;
  transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease, box-shadow 0.15s ease;
}
.btn-primary {
  background: var(--ink);
  color: #f4f7fb;
  box-shadow: var(--shadow-sm);
}
.btn-primary:hover {
  background: var(--navy);
  color: #fff;
  box-shadow: var(--shadow-md);
}
.btn-ghost {
  background: rgba(255, 255, 255, 0.7);
  color: var(--ink);
  border-color: var(--line-strong);
}
.btn-ghost:hover {
  border-color: var(--muted-2);
  color: var(--ink);
  background: #fff;
}

/* —— Sections —— */
.section {
  padding: 72px 0;
}
.section-label {
  margin: 0 0 10px;
  font-size: 12px;
  font-weight: 650;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--teal);
}
.section-title {
  margin: 0 0 14px;
  font-size: clamp(26px, 3.5vw, 34px);
  line-height: 1.2;
  letter-spacing: -0.03em;
  font-weight: 700;
}
.section-intro {
  margin: 0 0 36px;
  max-width: 58ch;
  color: var(--muted);
  font-size: 17px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px 24px;
  box-shadow: var(--shadow-sm);
  transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}
.card:hover {
  border-color: var(--line-strong);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.card-icon {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  margin-bottom: 16px;
  border-radius: 10px;
  background: var(--teal-soft);
  color: var(--teal-hover);
  font-size: 18px;
  font-weight: 700;
}
.card h3 {
  margin: 0 0 8px;
  font-size: 17px;
  letter-spacing: -0.02em;
  font-weight: 650;
}
.card p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.55;
}

/* Product feature card */
.product-card {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 0;
  border: 1px solid var(--line);
  border-radius: 20px;
  overflow: hidden;
  background: var(--card);
  box-shadow: var(--shadow-md);
  text-decoration: none;
  color: inherit;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.product-card:hover {
  border-color: rgba(20, 184, 166, 0.35);
  box-shadow: 0 12px 40px rgba(10, 22, 40, 0.08);
  color: inherit;
}
.product-card-body {
  padding: 40px 36px;
}
.product-card-body h3 {
  margin: 0 0 12px;
  font-size: 24px;
  letter-spacing: -0.03em;
}
.product-card-body p {
  margin: 0 0 20px;
  color: var(--muted);
  font-size: 15px;
  max-width: 42ch;
}
.product-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  font-size: 14px;
  color: var(--teal-hover);
  text-decoration: none;
}
.product-card:hover .product-link { color: var(--teal); }
.product-card-aside {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  gap: 14px;
  padding: 40px 36px;
  background:
    radial-gradient(ellipse at 80% 20%, rgba(20, 184, 166, 0.18), transparent 55%),
    linear-gradient(160deg, #0a1628 0%, #14335c 100%);
  color: #e8eef6;
}
.product-card-aside .pill {
  display: inline-flex;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(20, 184, 166, 0.2);
  color: #5eead4;
  font-size: 11px;
  font-weight: 650;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.product-card-aside strong {
  font-size: 20px;
  letter-spacing: -0.02em;
  font-weight: 650;
}
.product-card-aside span {
  font-size: 14px;
  color: rgba(232, 238, 246, 0.72);
  line-height: 1.5;
}

/* Trust strip */
.trust {
  padding: 28px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.55);
}
.trust-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  text-align: center;
}
.trust-item strong {
  display: block;
  margin-bottom: 4px;
  font-size: 13px;
  font-weight: 650;
  letter-spacing: -0.01em;
  color: var(--ink);
}
.trust-item span {
  font-size: 13px;
  color: var(--muted);
}

/* Contact */
.contact-box {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 32px 36px;
  box-shadow: var(--shadow-sm);
}
.contact-box dl {
  margin: 0;
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 14px 16px;
  font-size: 15px;
}
.contact-box dt {
  color: var(--muted);
  font-weight: 500;
}
.contact-box dd {
  margin: 0;
  color: var(--ink);
}
.note {
  margin-top: 20px;
  font-size: 13px;
  color: var(--muted);
  line-height: 1.55;
}
.zh-note {
  margin-top: 28px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  color: var(--muted);
}

/* Legal */
.legal-main {
  padding: 56px 0 80px;
  max-width: 720px;
}
.legal-main h1 {
  margin: 0 0 8px;
  font-size: clamp(28px, 4vw, 36px);
  letter-spacing: -0.03em;
  font-weight: 700;
}
.meta {
  color: var(--muted);
  font-size: 14px;
  margin: 0 0 32px;
}
.legal-main h2 {
  margin: 36px 0 12px;
  font-size: 18px;
  letter-spacing: -0.02em;
  font-weight: 650;
}
.legal-main p,
.legal-main li {
  color: #2a3548;
}
.legal-main ul { padding-left: 1.2em; }
.legal-main li { margin: 8px 0; }

/* Footer */
.site-footer {
  border-top: 1px solid var(--line);
  background: #fff;
  padding: 48px 0 40px;
  font-size: 13px;
  color: var(--muted);
}
.footer-top {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 28px;
  margin-bottom: 28px;
}
.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-width: 360px;
}
.footer-brand img {
  height: 26px;
  width: auto;
}
.footer-brand .co {
  font-weight: 650;
  color: var(--ink);
  font-size: 14px;
  letter-spacing: -0.01em;
}
.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  align-items: flex-start;
}
.footer-links a {
  color: var(--muted);
  text-decoration: none;
  font-weight: 500;
}
.footer-links a:hover { color: var(--ink); }
.footer-bottom {
  padding-top: 20px;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px;
}

/* Motion */
@keyframes fade-up {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}
.hero .wrap > * {
  animation: fade-up 0.7s ease both;
}
.hero .eyebrow { animation-delay: 0.05s; }
.hero h1 { animation-delay: 0.12s; }
.hero .lede { animation-delay: 0.2s; }
.hero .actions { animation-delay: 0.28s; }

@media (prefers-reduced-motion: reduce) {
  .hero .wrap > * { animation: none; }
  .card:hover { transform: none; }
  html { scroll-behavior: auto; }
}

@media (max-width: 900px) {
  .grid-3 { grid-template-columns: 1fr; }
  .product-card { grid-template-columns: 1fr; }
  .trust-grid { grid-template-columns: repeat(2, 1fr); gap: 18px 12px; }
}

@media (max-width: 640px) {
  .wrap { padding: 0 20px; }
  .hero { padding: 56px 0 48px; }
  .section { padding: 56px 0; }
  .nav { gap: 6px 14px; }
  .nav a:not(.nav-cta) { display: none; }
  .contact-box { padding: 24px 20px; }
  .contact-box dl { grid-template-columns: 1fr; gap: 2px 0; }
  .contact-box dt { margin-top: 12px; }
  .contact-box dt:first-child { margin-top: 0; }
  .product-card-body,
  .product-card-aside { padding: 28px 24px; }
  .trust-grid { grid-template-columns: 1fr 1fr; }
}