:root {
  --ink: #17161f;
  --muted: #5e5a6e;
  --soft: #f6f4fb;
  --line: #e6e1f3;
  --brand: #5b3fd6;
  --brand-dark: #4027b5;
  --mint: #63d4b1;
  --coral: #ff7b61;
  --white: #ffffff;
  --shadow: 0 18px 50px rgba(41, 28, 92, .12);
  --radius: 24px;
  --max: 1120px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.6;
}
a { color: var(--brand); text-decoration-thickness: 1.5px; text-underline-offset: 3px; }
a:hover { color: var(--brand-dark); }
img { max-width: 100%; }
.wrap { width: min(calc(100% - 40px), var(--max)); margin: 0 auto; }
.skip-link { position: absolute; left: -999px; top: 12px; }
.skip-link:focus { left: 12px; z-index: 100; background: #fff; padding: 10px 14px; border-radius: 10px; box-shadow: var(--shadow); }
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.94); backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(230,225,243,.85);
}
.nav { min-height: 78px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; color: var(--ink); font-weight: 800; font-size: 1.15rem; min-height: 64px; }
.brand img { width: 58px; height: 58px; object-fit: contain; display: block; filter: drop-shadow(0 4px 8px rgba(45,35,85,.10)); }
.nav-links { display: flex; align-items: center; gap: 22px; }
.nav-links a { color: var(--ink); text-decoration: none; font-weight: 650; font-size: .96rem; }
.nav-links a[aria-current="page"] { color: var(--brand); }
.nav-actions { display: flex; align-items: center; gap: 10px; }
.language-button, .menu-button, .button {
  border: 0; border-radius: 999px; font: inherit; font-weight: 750; cursor: pointer;
}
.language-button, .menu-button { background: var(--soft); color: var(--ink); padding: 10px 14px; }
.menu-button { display: none; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 13px 20px; text-decoration: none; }
.button.primary { background: var(--brand); color: #fff; box-shadow: 0 12px 28px rgba(91,63,214,.22); }
.button.primary:hover { background: var(--brand-dark); color: #fff; }
.button.secondary { background: #fff; color: var(--brand); border: 1px solid var(--line); }
.hero { padding: 88px 0 70px; overflow: hidden; background:
  radial-gradient(circle at 88% 8%, rgba(99,212,177,.24), transparent 24%),
  radial-gradient(circle at 7% 30%, rgba(255,123,97,.16), transparent 22%),
  linear-gradient(180deg, #fbfaff 0%, #fff 100%);
}
.hero-grid { display: grid; grid-template-columns: 1.15fr .85fr; align-items: center; gap: 54px; }
.eyebrow { display: inline-flex; align-items: center; gap: 9px; font-size: .86rem; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; color: var(--brand); }
.eyebrow::before { content: ""; width: 28px; height: 3px; border-radius: 3px; background: var(--coral); }
h1 { font-size: clamp(2.8rem, 6vw, 5.6rem); line-height: .98; letter-spacing: -.055em; margin: 18px 0 26px; max-width: 10ch; }
.hero p { font-size: clamp(1.05rem, 2vw, 1.25rem); color: var(--muted); max-width: 62ch; }
.hero-buttons { display: flex; flex-wrap: wrap; gap: 12px; margin: 30px 0 18px; }
.hero-note { font-size: .92rem !important; color: var(--muted); }
.hero-card { position: relative; border-radius: 34px; background: #fff; box-shadow: var(--shadow); padding: 24px; border: 1px solid var(--line); }
.mock-phone { min-height: 520px; border-radius: 28px; background: linear-gradient(145deg, #201a3d, #5b3fd6 68%, #7d62ea); color: #fff; padding: 28px; display: flex; flex-direction: column; justify-content: space-between; }
.mock-top { display: flex; align-items: center; justify-content: space-between; font-size: .84rem; opacity: .9; }
.mock-orbit { width: 190px; height: 190px; margin: 26px auto; border-radius: 50%; border: 1px solid rgba(255,255,255,.28); display: grid; place-items: center; position: relative; }
.mock-orbit::before, .mock-orbit::after { content: ""; position: absolute; border-radius: 50%; border: 1px solid rgba(255,255,255,.2); }
.mock-orbit::before { inset: 20px; }
.mock-orbit::after { inset: 44px; }
.person { width: 68px; height: 126px; position: relative; }
.person .head { width: 28px; height: 28px; border-radius: 50%; background: var(--mint); margin: 0 auto 7px; }
.person .body { width: 8px; height: 52px; background: #fff; border-radius: 8px; margin: auto; position: relative; }
.person .body::before, .person .body::after { content: ""; position: absolute; top: 12px; width: 38px; height: 7px; border-radius: 8px; background: #fff; }
.person .body::before { right: 2px; transform: rotate(18deg); transform-origin: right center; }
.person .body::after { left: 2px; transform: rotate(-18deg); transform-origin: left center; }
.person .legs { width: 54px; height: 52px; margin: -1px auto 0; position: relative; }
.person .legs::before, .person .legs::after { content: ""; position: absolute; top: 0; width: 8px; height: 54px; border-radius: 8px; background: #fff; }
.person .legs::before { left: 18px; transform: rotate(8deg); }
.person .legs::after { right: 18px; transform: rotate(-8deg); }
.metric-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.metric { background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.16); border-radius: 18px; padding: 14px; }
.metric strong { display: block; font-size: 1.05rem; }
.metric span { font-size: .78rem; opacity: .82; }
section { padding: 86px 0; }
.section-head { max-width: 720px; margin-bottom: 38px; }
.section-head h2, .page-hero h1 { font-size: clamp(2.2rem, 4.5vw, 3.9rem); line-height: 1.05; letter-spacing: -.04em; margin: 12px 0 16px; }
.section-head p, .page-hero p { color: var(--muted); font-size: 1.08rem; }
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.card { border: 1px solid var(--line); border-radius: var(--radius); padding: 25px; background: #fff; box-shadow: 0 10px 30px rgba(37, 27, 78, .05); }
.card .icon { width: 46px; height: 46px; border-radius: 14px; display: grid; place-items: center; font-size: 1.35rem; background: var(--soft); margin-bottom: 18px; }
.card h3 { margin: 0 0 9px; font-size: 1.18rem; }
.card p { margin: 0; color: var(--muted); }
.band { background: var(--soft); }
.steps { counter-reset: step; display: grid; gap: 16px; }
.step { counter-increment: step; display: grid; grid-template-columns: 60px 1fr; gap: 18px; align-items: start; padding: 22px; border-radius: 20px; background: #fff; border: 1px solid var(--line); }
.step::before { content: counter(step); width: 48px; height: 48px; display: grid; place-items: center; border-radius: 50%; background: var(--brand); color: #fff; font-weight: 850; }
.step h3 { margin: 2px 0 5px; }
.step p { margin: 0; color: var(--muted); }
.safety { display: grid; grid-template-columns: 1fr 1fr; gap: 26px; align-items: stretch; }
.safety-panel { border-radius: 28px; padding: 32px; }
.safety-panel.dark { background: var(--ink); color: #fff; }
.safety-panel.light { background: #fff; border: 1px solid var(--line); }
.safety-panel ul { padding-left: 20px; }
.safety-panel li { margin: 10px 0; }
.status { background: linear-gradient(135deg, var(--brand), #7d62ea); color: #fff; border-radius: 32px; padding: 36px; display: grid; grid-template-columns: 1fr auto; gap: 28px; align-items: center; }
.status p { margin: 8px 0 0; opacity: .88; }
.faq { display: grid; gap: 12px; }
details { border: 1px solid var(--line); border-radius: 18px; padding: 18px 20px; background: #fff; }
summary { cursor: pointer; font-weight: 760; }
details p { color: var(--muted); }
.contact-card { display: grid; grid-template-columns: 1.2fr .8fr; gap: 24px; padding: 34px; border-radius: 30px; background: var(--ink); color: #fff; }
.contact-card p { color: rgba(255,255,255,.76); }
.contact-list { display: grid; gap: 10px; align-content: center; }
.contact-list a { color: #fff; }
.site-footer { border-top: 1px solid var(--line); padding: 34px 0 42px; background: #fff; }
.footer-grid { display: grid; grid-template-columns: 1fr auto; gap: 24px; align-items: center; }
.footer-links { display: flex; flex-wrap: wrap; gap: 16px; }
.footer-links a { color: var(--muted); text-decoration: none; }
.page-hero { padding: 76px 0 34px; background: linear-gradient(180deg, #fbfaff, #fff); }
.page-hero h1 { max-width: 14ch; }
.prose { width: min(calc(100% - 40px), 820px); margin: 0 auto; padding: 28px 0 84px; }
.prose h2 { margin-top: 38px; font-size: 1.55rem; }
.prose h3 { margin-top: 26px; }
.prose p, .prose li { color: #413d4c; }
.prose .notice { background: var(--soft); border-left: 4px solid var(--brand); padding: 18px 20px; border-radius: 0 16px 16px 0; }
.info-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; margin: 26px 0; }
.info-box { background: var(--soft); border-radius: 18px; padding: 20px; }
.info-box strong { display: block; margin-bottom: 4px; }
.badge { display: inline-flex; align-items: center; padding: 6px 10px; border-radius: 999px; background: #eafaf5; color: #176a52; font-size: .82rem; font-weight: 800; }
/* V1.2 language rendering: only hide the inactive language.
   Visible elements keep their natural display type (block, inline, list-item, etc.). */
html[data-language="en"] [data-lang="zh"],
html[data-language="zh"] [data-lang="en"] { display: none !important; }
.visually-hidden {
  position: absolute !important; width: 1px !important; height: 1px !important;
  padding: 0 !important; margin: -1px !important; overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important; white-space: nowrap !important; border: 0 !important;
}
@media (max-width: 900px) {
  .hero-grid, .safety, .contact-card { grid-template-columns: 1fr; }
  .cards { grid-template-columns: 1fr 1fr; }
  .hero-card { max-width: 560px; }
  .nav-links { display: none; position: absolute; left: 20px; right: 20px; top: 70px; background: #fff; box-shadow: var(--shadow); border: 1px solid var(--line); border-radius: 18px; padding: 18px; flex-direction: column; align-items: flex-start; }
  .nav-links.open { display: flex; }
  .menu-button { display: inline-flex; }
}
@media (max-width: 620px) {
  .wrap { width: min(calc(100% - 28px), var(--max)); }
  .cards, .info-grid { grid-template-columns: 1fr; }
  h1 { font-size: 3.25rem; }
  .hero { padding-top: 58px; }
  .mock-phone { min-height: 450px; }
  .status, .footer-grid { grid-template-columns: 1fr; }
  .status .button { justify-self: start; }
  .nav .brand span { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}


/* V1.1 accessibility and trust improvements */
button:focus-visible, a:focus-visible, summary:focus-visible {
  outline: 3px solid rgba(91, 63, 214, .35);
  outline-offset: 4px;
}
.language-button { min-width: 70px; transition: background .18s ease, transform .18s ease; }
.language-button:hover { background: #ece8fa; transform: translateY(-1px); }
.trust-points { display: flex; flex-wrap: wrap; gap: 10px; margin: 22px 0 0; padding: 0; list-style: none; }
.trust-points li { display: inline-flex; align-items: center; gap: 7px; padding: 8px 11px; border-radius: 999px; background: rgba(255,255,255,.78); border: 1px solid var(--line); color: #413d4c; font-size: .86rem; font-weight: 680; }
.trust-points li::before { content: "✓"; color: #176a52; font-weight: 900; }
.site-meta { margin-top: 18px; display: flex; flex-wrap: wrap; gap: 12px 20px; color: rgba(255,255,255,.78); font-size: .9rem; }
.site-meta a { color: #fff; }
@media (max-width: 620px) {
  .trust-points { align-items: stretch; }
  .trust-points li { width: 100%; border-radius: 14px; }
}

/* V1.3: keep the disclosure control itself visible in both languages.
   Only its bilingual text spans are switched. */
.faq details > summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 28px;
  list-style: none;
}
.faq details > summary::-webkit-details-marker { display: none; }
.faq details > summary::after {
  content: "+";
  flex: 0 0 auto;
  font-size: 1.35rem;
  line-height: 1;
  color: var(--brand);
}
.faq details[open] > summary::after { content: "−"; }
.faq details > summary > [data-lang] { display: inline; }

@media (max-width: 640px) { .brand { gap: 9px; min-height: 54px; } .brand img { width: 48px; height: 48px; } }

/* V1.9 — normal A wordmark.
   Uses the same font, weight, spacing and colour for every letter so the
   POSTURE / PANTHER lockup remains clean and consistent across browsers. */
.brand {
  gap: 14px;
}
.brand-wordmark {
  display: grid;
  grid-template-rows: auto auto;
  align-content: center;
  justify-items: start;
  gap: 2px;
  min-width: 9.6rem;
  color: #17161f;
  font-family: "Avenir Next", Avenir, "Helvetica Neue", Arial, sans-serif;
  font-size: 1.02rem;
  font-weight: 650;
  letter-spacing: .235em;
  line-height: .94;
  text-transform: uppercase;
  white-space: nowrap;
}
.brand-wordmark > .brand-line {
  display: block;
}
.brand:hover .brand-wordmark,
.brand:focus-visible .brand-wordmark {
  color: #17161f;
}

@media (max-width: 620px) {
  .nav .brand .brand-wordmark {
    display: grid !important;
  }
  .nav .brand .brand-wordmark > .brand-line {
    display: block !important;
  }
  .brand-wordmark {
    min-width: 7.4rem;
    font-size: .76rem;
    letter-spacing: .18em;
    gap: 1px;
  }
}

@media (max-width: 390px) {
  .brand { gap: 7px; }
  .brand img { width: 43px; height: 43px; }
  .brand-wordmark {
    min-width: 6.25rem;
    font-size: .66rem;
    letter-spacing: .14em;
  }
  .language-button, .menu-button { padding: 8px 10px; }
}