:root {
  color-scheme: light;
  --bg: #f7f9fb;
  --surface: #fff;
  --ink: #172a38;
  --muted: #5e7382;
  --primary: #0f6b68;
  --primary-dark: #0b514e;
  --accent: #73d9c7;
  --line: #dde6eb;
  --navy: #0c1720;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 24px; }
body { margin: 0; background: var(--bg); color: var(--ink); font-family: Inter, "Segoe UI", "Noto Sans TC", "Microsoft JhengHei", system-ui, sans-serif; line-height: 1.75; -webkit-font-smoothing: antialiased; }
img { display: block; max-width: 100%; height: auto; }
a { color: var(--primary); text-underline-offset: .25em; text-decoration-thickness: 1px; }
a:hover { color: var(--primary-dark); }
a:focus-visible, summary:focus-visible { outline: 3px solid #418ac4; outline-offset: 6px; border-radius: 3px; }
button, a, summary { -webkit-tap-highlight-color: transparent; }
figure, dl, dd { margin: 0; }
p { margin: 16px 0 0; }
h1, h2, h3 { margin: 0; font-weight: 700; line-height: 1.35; }
h1 { font-size: clamp(38px, 4.4vw, 62px); letter-spacing: -.045em; }
h2 { font-size: clamp(28px, 2.7vw, 38px); letter-spacing: -.035em; }
h3 { font-size: 19px; }
.shell { width: min(100% - 64px, 1120px); margin-inline: auto; }
.skip-link { position: absolute; top: 8px; left: 16px; z-index: 3; padding: 10px 16px; background: #fff; transform: translateY(-160%); }
.skip-link:focus { transform: translateY(0); }
.topbar { background: #fff; border-bottom: 1px solid var(--line); }
.topbar-inner { min-height: 88px; display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.brand { display: inline-flex; align-items: center; gap: 12px; color: var(--ink); text-decoration: none; flex-shrink: 0; }
.brand img { width: 44px; height: 44px; }
.brand-name { font-size: 22px; font-weight: 750; line-height: 1.25; letter-spacing: -.7px; }
.brand-name > span { font-weight: 450; }
.brand-name small { display: block; margin-top: 5px; color: var(--muted); font-size: 10px; font-weight: 500; letter-spacing: 1.2px; }
.nav { display: flex; align-items: center; gap: 28px; flex-wrap: wrap; }
.nav a { padding-block: 10px; color: var(--muted); font-size: 13px; text-decoration: none; font-weight: 600; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--primary); }
.hero { color: #e7eff4; background: var(--navy); overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: 1.18fr 1fr; gap: 64px; align-items: center; padding-block: 50px 42px; }
.eyebrow { margin: 0 0 20px; color: var(--primary); font-size: 11px; font-weight: 700; letter-spacing: .16em; line-height: 1.8; }
.hero .eyebrow { color: var(--accent); display: flex; align-items: center; gap: 10px; }
.status-dot { width: 6px; height: 6px; border-radius: 50%; background: currentColor; flex-shrink: 0; }
.hero h1 span { color: var(--accent); }
.lede { font-size: clamp(17px, 1.6vw, 20px); color: #c5d4de; margin-top: 26px; }
.hero-description { color: #92aab9; font-size: 14px; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 20px; min-height: 48px; padding: 12px 22px; border-radius: 7px; border: 1px solid transparent; text-decoration: none; font-size: 13px; font-weight: 700; transition: background-color .15s; }
.button-primary { background: var(--accent); color: #062f2c; }
.button-primary:hover { background: #a3ebdb; color: #062f2c; }
.button-secondary { border-color: #36505f; color: #d5e2eb; }
.button-secondary:hover { background: #1a2b37; color: #fff; }
.release-status { color: #92aab9; font-size: 11px; margin-top: 15px; }
.hero-facts { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 37px; padding-top: 24px; border-top: 1px solid #283b48; }
.hero-facts dt { font-size: 14px; font-weight: 600; }
.hero-facts dd { font-size: 11px; color: #92aab9; margin-top: 6px; }
.hero-preview { position: relative; display: flex; flex-direction: column; align-items: center; padding: 12px 0 0; }
.hero-preview::before { content: ""; position: absolute; inset: 90px -20px 80px; background: radial-gradient(ellipse, #17484999, transparent 70%); pointer-events: none; }
.preview-caption-top { position: relative; display: flex; justify-content: space-between; width: 100%; max-width: 320px; color: #91aab7; font-size: 10px; letter-spacing: .1em; margin-bottom: 16px; }
.phone-frame { position: relative; width: min(100%, 248px); border: 7px solid #223744; border-radius: 27px; overflow: hidden; background: #0c1720; box-shadow: 0 24px 50px #0005, 0 0 0 1px #3c5565; }
.phone-frame img { width: 100%; }
figcaption { color: var(--muted); font-size: 11px; line-height: 1.7; }
.hero-preview figcaption { position: relative; margin-top: 18px; color: #91aab7; text-align: center; }
.section { padding-block: 84px; }
.section-heading { display: flex; justify-content: space-between; gap: 36px; align-items: end; margin-bottom: 38px; }
.section-heading p:not(.eyebrow) { color: var(--muted); font-size: 14px; margin-top: 0; }
.section-heading .eyebrow, .compatibility .eyebrow { margin-bottom: 12px; }
.experience { background: #f7f9fb; }
.experience-grid { display: grid; grid-template-columns: 1.4fr 1fr; gap: 42px; align-items: center; }
.wide-preview img { border: 1px solid var(--line); border-radius: 10px; box-shadow: 0 16px 32px #172a380a; }
.wide-preview figcaption { margin-top: 12px; }
.feature-list article { display: flex; gap: 18px; padding-block: 23px; border-bottom: 1px solid var(--line); }
.feature-list article:first-child { padding-top: 0; }
.feature-list article:last-child { border: 0; padding-bottom: 0; }
.feature-number { color: var(--primary); font-family: ui-monospace, monospace; font-size: 12px; line-height: 2.2; }
.feature-list p { color: var(--muted); font-size: 13px; margin-top: 9px; }
.theme-note { display: flex; align-items: center; gap: 15px; margin-top: 34px; padding-top: 24px; border-top: 1px solid var(--line); font-size: 13px; }
.theme-note p { margin: 0; }
.theme-note a { margin-left: auto; font-size: 12px; }
.theme-swatches { display: flex; flex-shrink: 0; }
.theme-swatches i { display: block; width: 22px; height: 22px; border: 1px solid #c6d4dc; background: #fff; border-radius: 50%; }
.theme-swatches i + i { background: var(--navy); margin-left: -5px; }
.preview-disclosure { color: var(--muted); font-size: 11px; margin-top: 18px; }
.compatibility { background: #eaf1f2; border-block: 1px solid #dce6e8; }
.compatibility-grid { display: grid; grid-template-columns: .9fr 1.25fr; gap: 84px; }
.section-intro { max-width: 330px; font-size: 14px; color: var(--muted); margin-top: 20px; }
.text-link { display: inline-block; margin-top: 26px; font-size: 13px; font-weight: 600; }
.compatibility-details details { border-bottom: 1px solid #c9d8de; }
.compatibility-details details:first-child { border-top: 1px solid #c9d8de; }
summary { cursor: pointer; padding: 21px 28px 21px 0; list-style: none; position: relative; font-size: 15px; font-weight: 600; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; position: absolute; right: 0; color: var(--primary); font-size: 20px; line-height: 1.2; }
details[open] > summary::after { content: "−"; }
.compatibility-details details p { margin: 0; padding: 0 25px 23px 0; color: #536a78; font-size: 13px; }
.support-section { background: #fff; }
.quick-links { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.quick-link { display: block; padding: 24px; background: var(--bg); border: 1px solid var(--line); border-radius: 8px; color: var(--ink); text-decoration: none; }
.quick-link:hover { border-color: #8cb8b4; color: var(--ink); }
.quick-link > span { display: block; color: var(--primary); font-size: 10px; font-weight: 700; letter-spacing: .12em; }
.quick-link strong { display: flex; justify-content: space-between; gap: 10px; margin-top: 20px; font-size: 17px; }
.quick-link b { color: var(--primary); font-weight: 400; }
.quick-link small { display: block; margin-top: 10px; color: var(--muted); font-size: 12px; line-height: 1.8; }
.brand-transition { display: flex; align-items: start; gap: 28px; margin-top: 30px; padding-top: 24px; border-top: 1px solid var(--line); font-size: 11px; color: var(--muted); }
.brand-transition strong { white-space: nowrap; font-weight: 600; }
.brand-transition p { margin: 0; }
.footer { background: var(--navy); padding-block: 30px; color: #a9bdc9; font-size: 11px; }
.footer-inner { display: flex; justify-content: space-between; gap: 32px; align-items: center; }
.footer strong { display: block; color: #e7eff4; font-size: 18px; font-weight: 600; }
.footer span { display: block; margin-top: 5px; }
.footer p { margin: 0; }
.footer a { color: var(--accent); }
.content { padding: 60px 0 84px; background: #fff; }
.content .shell { max-width: 820px; }
.content h1 { font-size: clamp(34px, 4vw, 48px); }
.content h2 { margin-top: 42px; padding-top: 22px; border-top: 1px solid var(--line); font-size: 26px; }
.content h3 { margin-top: 24px; }
.content p, .content li { color: #445c6d; }
.content .meta { margin: 0 0 12px; font-size: 12px; color: var(--muted); }
.content ul { padding-left: 24px; }
.content li + li { margin-top: 9px; }
.content code { overflow-wrap: anywhere; font-size: .9em; }
.notice { margin-top: 24px; padding: 20px 24px; border-left: 3px solid var(--primary); background: #edf6f4; border-radius: 0 8px 8px 0; font-size: 14px; }
.notice p:first-child { margin-top: 0; }
@media (max-width: 960px) {
  .hero-grid { gap: 32px; }
  .experience-grid { grid-template-columns: 1fr; }
  .feature-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
  .feature-list article { padding: 0; border: 0; }
  .compatibility-grid { gap: 42px; grid-template-columns: .85fr 1fr; }
  .section-heading { align-items: start; flex-direction: column; gap: 16px; }
}
@media (max-width: 720px) {
  .shell { width: min(100% - 40px, 560px); }
  .topbar-inner { padding-block: 18px 12px; flex-direction: column; align-items: start; gap: 12px; }
  .nav { gap: 24px; width: 100%; }
  .nav a { font-size: 12px; }
  .hero-grid { grid-template-columns: 1fr; padding-block: 42px 32px; gap: 32px; }
  .hero h1 { font-size: clamp(36px, 7.8vw, 52px); }
  .hero-facts { margin-top: 30px; }
  .hero-preview { padding-top: 8px; }
  .phone-frame { width: 220px; }
  .preview-caption-top { max-width: 290px; }
  .section { padding-block: 52px; }
  .feature-list { grid-template-columns: 1fr; gap: 0; }
  .feature-list article { border-bottom: 1px solid var(--line); padding-block: 20px; }
  .feature-list article:first-child { padding-top: 0; }
  .theme-note { flex-wrap: wrap; gap: 10px; }
  .theme-note a { margin-left: 0; width: 100%; }
  .compatibility-grid { grid-template-columns: 1fr; gap: 32px; }
  .section-intro { max-width: none; }
  .quick-links { grid-template-columns: 1fr; gap: 14px; }
  .quick-link { padding: 22px; }
  .brand-transition { flex-direction: column; gap: 10px; }
  .footer-inner { flex-direction: column; align-items: start; gap: 20px; }
  .content { padding-block: 38px 56px; }
  .content h2 { font-size: 23px; }
}
@media (max-width: 380px) {
  .shell { width: calc(100% - 32px); }
  .nav { gap: 18px; }
  .actions { flex-direction: column; }
  .hero-facts { gap: 8px; }
  .hero-facts dt { font-size: 12px; }
  .hero-facts dd { font-size: 10px; }
  .desktop-break { display: none; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } * { transition: none !important; } }