:root {
  color-scheme: light;
  --ink: #101312;
  --muted: #5d625f;
  --line: #cdd1ce;
  --soft-line: #e7e9e8;
  --paper: #ffffff;
  --wash: #f4f6f5;
  --forest: #1d5d56;
  --rust: #a84624;
  --content: 1180px;
  font-family: Inter, "SF Pro Text", "PingFang HK", "Noto Sans TC", system-ui, -apple-system, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); line-height: 1.55; }
a { color: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
img { max-width: 100%; display: block; }

.skip-link {
  position: fixed;
  left: 16px;
  top: -80px;
  z-index: 100;
  padding: 10px 14px;
  color: white;
  background: var(--ink);
  border: 1px solid var(--ink);
}
.skip-link:focus { top: 12px; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  min-height: 72px;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  width: min(calc(100% - 40px), var(--content));
  min-height: 72px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 26px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-size: 1.08rem;
  font-weight: 760;
  white-space: nowrap;
}
.brand img { width: 38px; height: 38px; border-radius: 8px; }
.brand small { display: block; color: var(--muted); font-size: 0.64rem; font-weight: 620; text-transform: uppercase; }
.site-nav { margin-left: auto; display: flex; align-items: center; gap: 24px; }
.site-nav a { text-decoration: none; font-size: 0.92rem; font-weight: 650; border-bottom: 1px solid transparent; }
.site-nav a:hover, .site-nav a:focus-visible, .site-nav a[aria-current="page"] { border-color: var(--ink); }
.language-switch { display: inline-flex; border: 1px solid var(--line); }
.language-switch button {
  min-width: 42px;
  min-height: 34px;
  padding: 5px 10px;
  border: 0;
  border-right: 1px solid var(--line);
  color: var(--muted);
  background: white;
  cursor: pointer;
}
.language-switch button:last-child { border-right: 0; }
.language-switch button[aria-pressed="true"] { color: white; background: var(--ink); }
.menu-button {
  display: none;
  width: 42px;
  height: 42px;
  padding: 0;
  border: 1px solid var(--ink);
  background: white;
  cursor: pointer;
}
.menu-button span, .menu-button::before, .menu-button::after {
  content: "";
  display: block;
  width: 19px;
  height: 1px;
  margin: 5px auto;
  background: var(--ink);
}

.hero {
  min-height: min(760px, calc(100svh - 118px));
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(255,255,255,0.96) 0%, rgba(255,255,255,0.82) 42%, rgba(255,255,255,0.08) 72%);
}
.hero-media { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: 58% center; }
.hero-inner {
  position: relative;
  z-index: 1;
  width: min(calc(100% - 40px), var(--content));
  margin: 0 auto;
  padding-top: clamp(50px, 8vh, 96px);
}
.hero-copy { width: min(610px, 58%); }
.eyebrow { margin: 0 0 14px; font-size: 0.74rem; font-weight: 800; text-transform: uppercase; letter-spacing: 0; }
.hero h1 { margin: 0; font-size: clamp(3.8rem, 9vw, 7.8rem); line-height: 0.9; letter-spacing: 0; }
.hero-lede { max-width: 570px; margin: 24px 0 0; font-size: clamp(1.08rem, 2vw, 1.38rem); font-weight: 620; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.button {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 11px 18px;
  border: 1.5px solid var(--ink);
  border-radius: 4px;
  background: white;
  color: var(--ink);
  text-decoration: none;
  font-weight: 760;
}
.button:hover, .button:focus-visible { background: var(--ink); color: white; }
.button.primary { color: white; background: var(--ink); }
.button.primary:hover, .button.primary:focus-visible { color: var(--ink); background: white; }
.button.small { min-height: 40px; padding: 8px 13px; font-size: 0.9rem; }

.band { border-bottom: 1px solid var(--line); }
.band.wash { background: var(--wash); }
.section-inner { width: min(calc(100% - 40px), var(--content)); margin: 0 auto; padding: clamp(64px, 9vw, 112px) 0; }
.section-heading { max-width: 760px; margin-bottom: 42px; }
.section-heading h2, .page-heading h1 { margin: 0; font-size: clamp(2.15rem, 5vw, 4.4rem); line-height: 1.02; letter-spacing: 0; }
.section-heading p, .page-heading p { max-width: 690px; margin: 18px 0 0; color: var(--muted); font-size: 1.08rem; }
.rule { height: 1px; background: var(--line); }

.value-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.value-item { min-height: 250px; padding: 30px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.value-item .number { color: var(--rust); font-size: 0.78rem; font-weight: 850; }
.value-item h3 { margin: 46px 0 10px; font-size: 1.45rem; }
.value-item p { margin: 0; color: var(--muted); }

.product-split { display: grid; grid-template-columns: 0.9fr 1.1fr; align-items: stretch; border: 1px solid var(--line); }
.product-copy { padding: clamp(32px, 6vw, 72px); }
.product-copy h2 { margin: 0 0 22px; font-size: clamp(2.1rem, 5vw, 4.2rem); line-height: 1; }
.product-copy p { color: var(--muted); }
.feature-list { margin: 30px 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.feature-list li { display: flex; gap: 14px; padding: 14px 0; border-bottom: 1px solid var(--line); }
.feature-list strong { min-width: 28px; color: var(--forest); }
.product-art { min-height: 540px; position: relative; background: #d9eeeb; overflow: hidden; }
.product-art img { width: 100%; height: 100%; object-fit: cover; object-position: 48% 72%; }

.safety-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: start; }
.safety-points { border-top: 1px solid var(--ink); }
.safety-point { display: grid; grid-template-columns: 40px 1fr; gap: 18px; padding: 22px 0; border-bottom: 1px solid var(--line); }
.safety-point b { color: var(--forest); }
.safety-point h3 { margin: 0 0 6px; font-size: 1.08rem; }
.safety-point p { margin: 0; color: var(--muted); }

.contact-strip { display: flex; align-items: end; justify-content: space-between; gap: 30px; }
.contact-strip h2 { max-width: 690px; margin: 0; font-size: clamp(2.1rem, 5vw, 4.4rem); line-height: 1.02; }

.facts { display: grid; grid-template-columns: repeat(3, 1fr); border: 1px solid var(--line); }
.fact { padding: 24px; border-right: 1px solid var(--line); }
.fact:last-child { border-right: 0; }
.fact strong { display: block; margin-bottom: 4px; font-size: 1.1rem; }
.fact span { color: var(--muted); }
.inline-links { display: flex; flex-wrap: wrap; gap: 12px 24px; margin-top: 26px; }
.inline-links a { font-weight: 700; text-underline-offset: 4px; }
.document a { text-underline-offset: 3px; }
.document code { padding: 2px 5px; border: 1px solid var(--line); background: var(--wash); }
.operator-line { max-width: 540px; margin-top: 14px; color: var(--ink); font-size: 0.92rem; font-weight: 650; text-shadow: 0 1px 10px rgba(255,255,255,0.96); }

.page-hero { border-bottom: 1px solid var(--line); background: var(--wash); }
.page-heading { width: min(calc(100% - 40px), var(--content)); margin: 0 auto; padding: clamp(70px, 11vw, 130px) 0 clamp(54px, 8vw, 90px); }
.document { width: min(calc(100% - 40px), 860px); margin: 0 auto; padding: 64px 0 100px; }
.document h2 { margin: 44px 0 12px; padding-top: 12px; border-top: 1px solid var(--line); font-size: 1.55rem; }
.document h3 { margin: 28px 0 8px; font-size: 1.08rem; }
.document p, .document li { color: #373b39; }
.document ul, .document ol { padding-left: 22px; }
.document .notice { padding: 18px; border: 1px solid var(--ink); border-left: 5px solid var(--forest); }
.document .meta { margin-bottom: 38px; color: var(--muted); font-size: 0.92rem; }
.support-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; margin: 34px 0; }
.support-item { padding: 24px; border: 1px solid var(--line); border-radius: 6px; }
.support-item h3 { margin-top: 0; }

.invite-page { min-height: 100svh; background: var(--wash); }
.invite-main { min-height: 100svh; display: grid; place-items: center; padding: 28px 20px; }
.invite-panel {
  width: min(100%, 560px);
  padding: clamp(28px, 7vw, 54px);
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
  text-align: center;
}
.invite-icon { width: 72px; height: 72px; margin: 0 auto 18px; border-radius: 14px; }
.invite-panel h1 { margin: 0 0 14px; font-size: clamp(2rem, 8vw, 3.4rem); line-height: 1; }
.invite-panel > p:not(.eyebrow) { color: var(--muted); }
.invite-actions { display: grid; gap: 10px; margin-top: 26px; }
.invite-note { margin: 18px 0 0; font-size: 0.88rem; }
.invite-invalid { color: var(--ink) !important; font-weight: 700; }
.invite-language { width: fit-content; margin: 24px auto 0; }

.site-footer { background: var(--ink); color: white; }
.footer-inner { width: min(calc(100% - 40px), var(--content)); margin: 0 auto; padding: 56px 0 34px; }
.footer-top { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 54px; }
.footer-brand { font-size: 1.5rem; font-weight: 800; }
.footer-top p { color: #b9bfbc; }
.footer-links { display: grid; gap: 10px; align-content: start; }
.footer-links strong { margin-bottom: 5px; font-size: 0.78rem; text-transform: uppercase; color: #b9bfbc; }
.footer-links a { width: fit-content; color: white; text-decoration: none; border-bottom: 1px solid transparent; }
.footer-links a:hover, .footer-links a:focus-visible { border-color: white; }
.footer-bottom { display: flex; justify-content: space-between; gap: 24px; margin-top: 42px; padding-top: 20px; border-top: 1px solid #444946; color: #b9bfbc; font-size: 0.82rem; }

@media (max-width: 840px) {
  .header-inner { width: min(calc(100% - 28px), var(--content)); }
  .menu-button { display: block; margin-left: auto; }
  .site-nav {
    display: none;
    position: absolute;
    left: 0;
    right: 0;
    top: 72px;
    margin: 0;
    padding: 20px;
    flex-direction: column;
    align-items: stretch;
    background: white;
    border-bottom: 1px solid var(--line);
  }
  .site-nav[data-open] { display: flex; }
  .language-switch { width: fit-content; }
  .hero { min-height: calc(100svh - 112px); }
  .hero-media { object-position: 61% center; }
  .hero-inner { width: calc(100% - 32px); padding-top: 44px; }
  .hero-copy { width: 78%; }
  .hero h1 { font-size: clamp(3.6rem, 18vw, 6rem); }
  .hero-lede { font-size: 1.05rem; }
  .section-inner, .page-heading, .document, .footer-inner { width: calc(100% - 32px); }
  .value-grid { grid-template-columns: 1fr; }
  .value-item { min-height: 190px; }
  .value-item h3 { margin-top: 26px; }
  .product-split { grid-template-columns: 1fr; }
  .product-art { min-height: 460px; }
  .safety-layout { grid-template-columns: 1fr; gap: 34px; }
  .contact-strip { align-items: start; flex-direction: column; }
  .facts { grid-template-columns: 1fr; }
  .fact { border-right: 0; border-bottom: 1px solid var(--line); }
  .fact:last-child { border-bottom: 0; }
  .footer-top { grid-template-columns: 1fr 1fr; }
  .footer-top > :first-child { grid-column: 1 / -1; }
}

@media (max-width: 520px) {
  .brand small { display: none; }
  .hero { min-height: calc(100svh - 104px); }
  .hero-media { top: 60%; height: 40%; object-position: 64% 48%; }
  .hero::after { background: linear-gradient(180deg, #fff 0%, #fff 60%, rgba(255,255,255,0) 60%); }
  .hero-copy { width: 100%; }
  .hero h1 { font-size: clamp(3.7rem, 21vw, 5.4rem); }
  .hero-lede { width: 88%; }
  .hero-actions .button { width: 100%; }
  .hero .operator-line { display: none; }
  .support-grid, .footer-top { grid-template-columns: 1fr; }
  .footer-top > :first-child { grid-column: auto; }
  .footer-bottom { flex-direction: column; }
}

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