:root {
  color-scheme: light;
  --ink: #13211f;
  --muted: #5c6a66;
  --line: #dce7e3;
  --paper: #ffffff;
  --soft: #f4faf7;
  --soft-strong: #e6f5ef;
  --brand: #0f766e;
  --brand-deep: #0b4f49;
  --warning: #745000;
  --warning-soft: #fff7df;
  --shadow: 0 22px 52px rgba(19, 33, 31, 0.12);
  --font-sans: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", system-ui, sans-serif;
  font-family: var(--font-sans);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  min-width: 320px;
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-size: 17px;
  line-height: 1.68;
}

button,
a { font: inherit; }

a { color: inherit; text-decoration: none; }

button { cursor: pointer; }

img { display: block; max-width: 100%; }

:focus-visible { outline: 3px solid #1a9a8e; outline-offset: 4px; }

.site-shell { min-height: 100vh; display: flex; flex-direction: column; }

.container { width: min(1200px, calc(100% - 64px)); margin: 0 auto; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(220, 231, 227, 0.88);
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(14px);
}

.header-inner {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand { display: inline-flex; align-items: center; gap: 10px; font-size: 18px; font-weight: 800; letter-spacing: -0.025em; }
.brand img { width: 38px; height: 38px; }

.site-nav { display: flex; align-items: center; gap: 30px; }
.site-nav > a:not(.button) { color: var(--muted); font-size: 15px; font-weight: 700; }
.site-nav > a:not(.button):hover { color: var(--brand-deep); }

.menu-button { display: none; min-height: 44px; padding: 8px 0; border: 0; color: var(--brand-deep); background: transparent; font-size: 15px; font-weight: 800; }

h1, h2, h3, p { margin-top: 0; }

h1 {
  max-width: 980px;
  margin-bottom: 26px;
  font-size: clamp(45px, 5.35vw, 76px);
  line-height: 1.08;
  letter-spacing: -0.055em;
}

h2 {
  margin-bottom: 0;
  font-size: clamp(35px, 4vw, 56px);
  line-height: 1.14;
  letter-spacing: -0.045em;
}

h3 { margin-bottom: 8px; font-size: 21px; line-height: 1.28; letter-spacing: -0.028em; }

.eyebrow { margin-bottom: 14px; color: var(--brand-deep); font-size: 14px; font-weight: 800; letter-spacing: 0.035em; }

.button {
  min-height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 19px;
  border: 1px solid transparent;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 800;
  transition: background-color 180ms ease, color 180ms ease, border-color 180ms ease, transform 180ms ease;
}

.button:hover { transform: translateY(-1px); }
.button-primary { color: #fff; background: var(--brand); }
.button-primary:hover { background: var(--brand-deep); }
.button-secondary { border-color: var(--line); color: var(--brand-deep); background: #fff; }
.button-secondary:hover { border-color: var(--brand); background: var(--soft); }
.button-light { color: var(--brand-deep); background: #fff; }
.button-light:hover { background: var(--soft-strong); }
.nav-cta { margin-left: 4px; }

.hero,
.detail-hero { position: relative; overflow: hidden; border-bottom: 1px solid var(--line); background: var(--soft); }

.ambient-image { position: absolute; inset: 0; z-index: 0; width: 100%; height: 100%; object-fit: cover; opacity: 0.5; pointer-events: none; }
.hero-ambient { opacity: 0.56; }

.hero-inner { position: relative; z-index: 1; display: grid; justify-items: center; padding: 128px 0 112px; text-align: center; }
.hero-copy { max-width: 940px; }
.hero-lede { max-width: 720px; margin: 0 auto 32px; color: var(--muted); font-size: 19px; line-height: 1.7; }

.product-frame { position: relative; z-index: 1; margin: 0; overflow: hidden; border: 1px solid rgba(131, 166, 158, 0.56); border-radius: 20px; background: #fff; box-shadow: var(--shadow); }
.product-frame img { width: 100%; height: 100%; object-fit: cover; }
.hero-preview { width: min(100%, 1040px); aspect-ratio: 16 / 9.4; margin-top: 58px; }

.benefits-section { padding: 54px 0; border-bottom: 1px solid var(--line); }
.benefits-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); }
.benefit { min-width: 0; padding: 12px 44px; border-right: 1px solid var(--line); }
.benefit:first-child { padding-left: 0; }
.benefit:last-child { padding-right: 0; border-right: 0; }
.benefit p, .step p, .audience-item p, .detail-feature p { margin: 0; color: var(--muted); font-size: 16px; }

.icon-disc { width: 44px; height: 44px; display: grid; place-items: center; margin-bottom: 18px; border-radius: 50%; background: var(--soft-strong); }
.line-icon { width: 23px; height: 23px; object-fit: contain; }

.products-intro { padding: 144px 0 26px; }
.section-intro { max-width: 800px; }
.section-intro.centered { margin: 0 auto; text-align: center; }

.product-showcase { position: relative; padding: 88px 0; overflow: hidden; }
.product-showcase:nth-of-type(even) { background: #fbfdfc; }
.showcase-grid { display: grid; grid-template-columns: minmax(0, 0.88fr) minmax(0, 1.12fr); align-items: center; gap: clamp(44px, 7vw, 108px); }
.showcase-copy { min-width: 0; }
.showcase-copy h2 { margin-bottom: 20px; }
.showcase-headline { margin-bottom: 26px; font-size: 21px; font-weight: 700; line-height: 1.52; }
.use-list { display: grid; gap: 10px; margin: 0 0 28px; padding: 0; list-style: none; color: var(--muted); }
.use-list li { display: flex; align-items: flex-start; gap: 10px; }
.use-list li::before { content: ""; width: 7px; height: 7px; flex: 0 0 auto; margin-top: 10px; border-radius: 50%; background: var(--brand); }
.scenario { margin-bottom: 30px; padding: 18px 20px; border-left: 3px solid var(--brand); color: var(--muted); background: var(--soft); }
.scenario p { margin-bottom: 4px; color: var(--brand-deep); font-size: 13px; font-weight: 800; }
.scenario span { font-size: 16px; }
.showcase-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 18px; }
.text-link { min-height: 44px; display: inline-flex; align-items: center; color: var(--brand-deep); font-size: 15px; font-weight: 800; }
.text-link:hover { color: var(--brand); }

.showcase-stage { position: relative; min-height: 540px; display: grid; place-items: center; padding: 44px 0; overflow: hidden; }
.showcase-stage .ambient-image { opacity: 0.35; }
.showcase-stage .product-frame { width: 100%; aspect-ratio: 16 / 10; }

.how-section { padding: 142px 0; background: var(--soft); }
.steps-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; margin-top: 62px; }
.step { position: relative; min-width: 0; padding: 34px 30px; border: 1px solid var(--line); border-radius: 18px; background: #fff; }
.step-number { position: absolute; top: 27px; right: 28px; color: #a1b4ae; font-size: 14px; font-weight: 800; letter-spacing: 0.06em; }

.audience-section { padding: 138px 0; }
.audience-layout { display: grid; grid-template-columns: minmax(0, 0.84fr) minmax(0, 1.16fr); gap: clamp(46px, 9vw, 140px); align-items: start; }
.audience-list { display: grid; }
.audience-item { display: grid; grid-template-columns: 30px 1fr; gap: 18px; padding: 25px 0; border-bottom: 1px solid var(--line); }
.audience-item:first-child { padding-top: 0; }
.audience-item:last-child { padding-bottom: 0; border-bottom: 0; }
.audience-item > .line-icon { width: 24px; height: 24px; margin-top: 4px; }

.final-cta { padding: 118px 0; color: #fff; background: var(--brand-deep); }
.final-cta-inner { display: flex; flex-direction: column; align-items: center; max-width: 780px; text-align: center; }
.final-cta .eyebrow { color: #b9e3da; }
.final-cta h2 { margin-bottom: 18px; }
.final-cta p:not(.eyebrow) { margin-bottom: 30px; color: #e6f5ef; font-size: 18px; }

.detail-hero { padding: 120px 0 102px; }
.detail-hero-grid { position: relative; z-index: 1; display: grid; grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr); align-items: center; gap: clamp(44px, 7vw, 100px); }
.detail-hero h1 { font-size: clamp(43px, 4.6vw, 68px); }
.detail-hero .hero-lede { margin-left: 0; text-align: left; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.detail-preview { aspect-ratio: 16 / 10; }

.detail-features-section { padding: 96px 0 38px; }
.detail-features-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); }
.detail-feature { padding: 24px 40px; border-right: 1px solid var(--line); }
.detail-feature:first-child { padding-left: 0; }
.detail-feature:last-child { padding-right: 0; border-right: 0; }

.windows-section { padding: 56px 0 130px; }
.release-panel { padding: clamp(28px, 5vw, 56px); border: 1px solid var(--line); border-radius: 20px; background: #fff; box-shadow: 0 14px 38px rgba(19, 33, 31, 0.05); }
.release-unavailable { background: var(--soft); }
.release-unavailable > p:not(.eyebrow) { max-width: 560px; color: var(--muted); }
.release-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 24px; margin-bottom: 32px; }
.release-heading h2 { font-size: clamp(31px, 3.5vw, 46px); }
.release-data { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); margin: 0 0 28px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.release-data div { min-width: 0; padding: 17px 18px 17px 0; }
.release-data dt { margin-bottom: 5px; color: var(--muted); font-size: 13px; font-weight: 700; }
.release-data dd { margin: 0; font-size: 15px; font-weight: 800; overflow-wrap: anywhere; }
.checksum-block { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 18px 20px; border: 1px solid var(--line); border-radius: 12px; background: var(--soft); }
.checksum-block p { margin-bottom: 5px; color: var(--muted); font-size: 13px; font-weight: 800; }
.checksum-block code { display: block; max-width: 100%; overflow-wrap: anywhere; color: var(--ink); font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace; font-size: 13px; }
.copy-status { min-height: 24px; margin: 8px 0 0; color: var(--brand-deep); font-size: 14px; }
.verify-inline { margin-top: 28px; padding-top: 28px; border-top: 1px solid var(--line); }
.verify-inline h3 { font-size: 20px; }
.verify-inline ol { display: grid; gap: 10px; margin: 0; padding-left: 24px; color: var(--muted); }
.verify-inline code { padding: 3px 6px; border-radius: 5px; color: var(--ink); background: var(--soft); font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace; }
.beta-note { margin: 26px 0 0; padding: 14px 16px; border: 1px solid #eed798; border-radius: 10px; color: var(--warning); background: var(--warning-soft); font-size: 14px; }

.site-footer { margin-top: auto; padding: 48px 0; border-top: 1px solid var(--line); background: #fbfdfc; }
.brand-footer { margin-bottom: 14px; }
.footer-grid { display: grid; grid-template-columns: minmax(0, 1.12fr) minmax(0, 1fr) auto; gap: 48px; align-items: start; }
.footer-grid p, .footer-links, .footer-meta { margin: 0; color: var(--muted); font-size: 14px; }
.footer-links, .footer-meta { display: grid; gap: 8px; }
.footer-links a:hover, .footer-meta a:hover { color: var(--brand-deep); }

[data-reveal] { opacity: 0; transform: translateY(16px); transition: opacity 560ms ease, transform 560ms ease; }
[data-reveal].is-visible { opacity: 1; transform: translateY(0); }

@media (min-width: 760px) {
  .site-nav { display: flex !important; }
}

@media (max-width: 959px) {
  .container { width: min(100% - 48px, 1200px); }
  .hero-inner { padding: 96px 0 84px; }
  .product-showcase { padding: 72px 0; }
  .showcase-grid, .detail-hero-grid { grid-template-columns: 1fr; gap: 44px; }
  .product-showcase.reverse .showcase-stage { order: 2; }
  .product-showcase.reverse .showcase-copy { order: 1; }
  .showcase-stage { min-height: auto; padding: 34px 0; }
  .audience-layout { grid-template-columns: 1fr; gap: 52px; }
  .detail-hero { padding: 86px 0 78px; }
  .detail-hero .hero-lede { text-align: left; }
  .release-data { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 28px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-meta { grid-column: 1 / -1; }
}

@media (max-width: 759px) {
  .container { width: min(100% - 32px, 1200px); }
  .header-inner { min-height: 68px; }
  .menu-button { display: inline-flex; align-items: center; justify-content: center; }
  .site-nav { position: absolute; top: calc(100% + 1px); right: 0; left: 0; display: grid; gap: 0; padding: 12px 16px 18px; border-bottom: 1px solid var(--line); background: rgba(255, 255, 255, 0.98); box-shadow: 0 16px 30px rgba(19, 33, 31, 0.08); }
  .site-nav[hidden] { display: none; }
  .site-nav > a:not(.button) { min-height: 44px; display: flex; align-items: center; }
  .site-nav .nav-cta { width: 100%; margin: 8px 0 0; }
  h1 { font-size: clamp(38px, 10vw, 52px); line-height: 1.14; }
  .hero h1 br { display: none; }
  h2 { font-size: clamp(33px, 8.7vw, 45px); }
  .hero-inner { padding: 80px 0 68px; }
  .hero-lede { font-size: 17px; }
  .hero-preview { margin-top: 42px; border-radius: 14px; }
  .benefits-section { padding: 26px 0; }
  .benefits-grid, .detail-features-grid { grid-template-columns: 1fr; }
  .benefit, .detail-feature { padding: 26px 0; border-right: 0; border-bottom: 1px solid var(--line); }
  .benefit:last-child, .detail-feature:last-child { border-bottom: 0; }
  .products-intro { padding: 88px 0 14px; }
  .product-showcase { padding: 56px 0; }
  .showcase-grid { gap: 30px; }
  .showcase-copy h2 { margin-bottom: 16px; }
  .showcase-headline { margin-bottom: 21px; font-size: 19px; }
  .showcase-stage { padding: 24px 0; }
  .showcase-stage .product-frame { border-radius: 14px; }
  .how-section { padding: 86px 0; }
  .steps-grid { grid-template-columns: 1fr; gap: 14px; margin-top: 40px; }
  .step { padding: 28px 24px; }
  .audience-section { padding: 86px 0; }
  .audience-layout { gap: 42px; }
  .final-cta { padding: 84px 0; }
  .final-cta p:not(.eyebrow) { font-size: 17px; }
  .detail-hero { padding: 74px 0 60px; }
  .detail-hero h1 { font-size: clamp(42px, 10.5vw, 55px); }
  .detail-features-section { padding: 62px 0 28px; }
  .windows-section { padding: 28px 0 80px; }
  .release-panel { border-radius: 16px; }
  .release-heading, .checksum-block { flex-direction: column; align-items: stretch; }
  .release-heading .button, .checksum-block .button { width: 100%; }
  .release-data { grid-template-columns: 1fr; gap: 0; }
  .release-data div { padding: 14px 0; border-bottom: 1px solid var(--line); }
  .release-data div:last-child { border-bottom: 0; }
  .footer-grid { grid-template-columns: 1fr; gap: 30px; }
  .footer-meta { grid-column: auto; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
  [data-reveal] { opacity: 1; transform: none; }
}