:root {
  color-scheme: light;
  --page: #f5f5f7;
  --page-elevated: #ffffff;
  --surface: rgba(255, 255, 255, 0.82);
  --surface-solid: #fff;
  --ink: #1d1d1f;
  --secondary: #6e6e73;
  --tertiary: #92929a;
  --line: rgba(29, 29, 31, 0.075);
  --line-strong: rgba(29, 29, 31, 0.13);
  --control: rgba(118, 118, 128, 0.085);
  --blue: #0071e3;
  --blue-hover: #0077ed;
  --blue-soft: #e8f2ff;
  --green: #26a269;
  --header: rgba(250, 250, 252, 0.78);
  --shadow-soft: 0 12px 36px rgba(28, 32, 40, 0.055);
  --shadow-deep: 0 30px 88px rgba(16, 20, 28, 0.14);
}

html[data-theme="dark"] {
  color-scheme: dark;
  --page: #000;
  --page-elevated: #09090b;
  --surface: rgba(30, 30, 32, 0.78);
  --surface-solid: #171719;
  --ink: #f5f5f7;
  --secondary: #a1a1a6;
  --tertiary: #73737a;
  --line: rgba(255, 255, 255, 0.085);
  --line-strong: rgba(255, 255, 255, 0.15);
  --control: rgba(118, 118, 128, 0.2);
  --blue: #2997ff;
  --blue-hover: #40a2ff;
  --blue-soft: rgba(41, 151, 255, 0.14);
  --green: #32d583;
  --header: rgba(20, 20, 22, 0.78);
  --shadow-soft: 0 14px 44px rgba(0, 0, 0, 0.22);
  --shadow-deep: 0 36px 100px rgba(0, 0, 0, 0.42);
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; scroll-padding-top: 88px; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--page);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", sans-serif;
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  transition: color 220ms ease, background-color 220ms ease;
}
::selection { color: var(--ink); background: var(--blue-soft); }
a { color: inherit; text-decoration: none; }
button, a { -webkit-tap-highlight-color: transparent; }
button { color: inherit; font: inherit; }
svg { fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }

.site-header {
  position: fixed;
  z-index: 30;
  top: 14px;
  left: 50%;
  width: min(1060px, calc(100% - 32px));
  height: 56px;
  padding: 0 8px 0 12px;
  display: flex;
  align-items: center;
  gap: 24px;
  transform: translateX(-50%);
  border: 1px solid var(--line);
  border-radius: 15px;
  background: var(--header);
  box-shadow: 0 10px 34px rgba(15, 18, 24, 0.065), inset 0 1px rgba(255, 255, 255, 0.38);
  backdrop-filter: blur(28px) saturate(175%);
}
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 680; white-space: nowrap; }
.brand img { border-radius: 9px; }
.site-header nav { display: flex; align-items: center; gap: 28px; margin: 0 auto; color: var(--secondary); font-size: 13px; }
.site-header nav a { padding: 8px 0; transition: color 140ms ease; }
.site-header nav a:hover { color: var(--ink); }
.header-actions { display: flex; align-items: center; gap: 6px; }
.icon-button, .language-toggle {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border: 0;
  border-radius: 10px;
  background: transparent;
  cursor: pointer;
}
.icon-button:hover, .language-toggle:hover { background: var(--control); }
.icon-button:active, .language-toggle:active { transform: scale(0.94); }
.icon-button:focus, .language-toggle:focus, .view-switcher button:focus, .lyrics-switcher button:focus { outline: none; }
.icon-button:focus-visible, .language-toggle:focus-visible, .view-switcher button:focus-visible, .lyrics-switcher button:focus-visible {
  box-shadow: 0 0 0 2px var(--page-elevated), 0 0 0 4px var(--blue);
}
.icon-button svg { width: 18px; height: 18px; }
.moon-icon { display: none; }
html[data-theme="dark"] .sun-icon { display: none; }
html[data-theme="dark"] .moon-icon { display: block; }
.language-toggle { font-size: 12px; font-weight: 700; }
.header-download, .primary-button {
  min-height: 40px;
  padding: 0 16px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: 11px;
  color: white;
  background: var(--blue);
  font-size: 14px;
  font-weight: 650;
  transition: transform 140ms ease, background-color 140ms ease, box-shadow 180ms ease;
}
.header-download:hover, .primary-button:hover { background: var(--blue-hover); }
.header-download:active, .primary-button:active { transform: scale(0.97); }
.header-download svg, .primary-button svg { width: 17px; height: 17px; }

.hero {
  min-height: 94vh;
  padding: 154px max(24px, calc((100vw - 1220px) / 2)) 104px;
  display: flex;
  flex-direction: column;
  align-items: center;
  overflow: hidden;
  text-align: center;
  background: var(--page-elevated);
}
.hero-copy { max-width: 940px; }
.eyebrow { margin: 0 0 14px; color: var(--blue); font-size: 13px; font-weight: 680; }
.hero h1 { margin: 0; display: flex; flex-direction: column; align-items: center; }
.hero h1 span { font-size: clamp(23px, 2vw, 29px); line-height: 1.2; font-weight: 620; }
.hero h1 strong { margin-top: 12px; font-size: clamp(48px, 6.2vw, 78px); line-height: 1.03; letter-spacing: 0; font-weight: 720; }
.hero-description { max-width: 700px; margin: 28px auto 0; color: var(--secondary); font-size: clamp(17px, 1.7vw, 20px); line-height: 1.62; }
.hero-actions { margin-top: 32px; display: flex; justify-content: center; align-items: center; gap: 20px; }
.primary-button { min-height: 48px; padding: 0 21px; box-shadow: 0 9px 28px rgba(0, 113, 227, 0.2); }
.text-button { min-height: 44px; display: inline-flex; align-items: center; gap: 3px; color: var(--blue); font-size: 15px; font-weight: 550; }
.text-button svg { width: 17px; height: 17px; transition: transform 140ms ease; }
.text-button:hover svg { transform: translateX(2px); }
.download-meta { margin: 17px 0 0; color: var(--tertiary); font-size: 11px; }

.hero-product { width: min(1280px, calc(100vw - 32px)); margin: 66px 0 0; }
.display-bezel {
  position: relative;
  padding: 9px;
  display: flex;
  align-items: flex-start;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: 26px;
  background: #050506;
  box-shadow: var(--shadow-deep);
}
.display-bezel video { width: 100%; height: auto; display: block; border-radius: 18px; background: #050506; }

.principles {
  width: min(1080px, calc(100% - 40px));
  margin: 0 auto;
  padding: 42px 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-bottom: 1px solid var(--line);
}
.principles div { display: flex; flex-direction: column; align-items: center; gap: 5px; border-right: 1px solid var(--line); }
.principles div:last-child { border: 0; }
.principles strong { font-size: 14px; font-weight: 650; }
.principles span { color: var(--tertiary); font-size: 12px; }

.page-section { width: min(1120px, calc(100% - 40px)); margin: 0 auto; padding: 128px 0; }
.section-heading { max-width: 740px; margin: 0 auto 46px; text-align: center; }
.section-heading h2, .pro-copy h2, .final-cta h2 { margin: 0; font-size: clamp(36px, 4.3vw, 52px); line-height: 1.08; letter-spacing: 0; font-weight: 700; }
.section-heading > p:last-child, .pro-copy > p:not(.eyebrow) { margin: 19px 0 0; color: var(--secondary); font-size: 16px; line-height: 1.68; }
.left-heading { margin-left: 0; text-align: left; }

.view-switcher, .lyrics-switcher {
  width: fit-content;
  margin: 0 auto 28px;
  padding: 3px;
  display: flex;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: color-mix(in srgb, var(--control) 72%, transparent);
}
.view-switcher button, .lyrics-switcher button { min-width: 104px; height: 38px; border: 0; border-radius: 9px; background: transparent; color: var(--secondary); font-size: 13px; font-weight: 620; cursor: pointer; }
.view-switcher button[aria-pressed="true"], .lyrics-switcher button[aria-pressed="true"] { color: var(--ink); background: var(--surface-solid); box-shadow: 0 1px 4px rgba(0, 0, 0, 0.08), inset 0 1px rgba(255, 255, 255, 0.45); }
.view-switcher button:active, .lyrics-switcher button:active { transform: scale(0.97); }
.showcase { margin: 0; overflow: hidden; border: 1px solid var(--line-strong); border-radius: 24px; background: var(--surface-solid); box-shadow: 0 22px 70px rgba(22, 26, 34, 0.1); }
.showcase-chrome { height: 46px; padding: 0 17px; display: flex; align-items: center; gap: 7px; border-bottom: 1px solid var(--line); color: var(--tertiary); font-size: 11px; background: var(--surface); }
.showcase-chrome i { width: 11px; height: 11px; border-radius: 50%; background: #ff5f57; }
.showcase-chrome i:nth-child(2) { background: #febc2e; }
.showcase-chrome i:nth-child(3) { background: #28c840; }
.showcase-chrome span { margin-left: 5px; }
.showcase-viewport { position: relative; aspect-ratio: 1920 / 250; overflow: hidden; background: #08090b; transition: aspect-ratio 320ms cubic-bezier(.2,.8,.2,1); }
.showcase[data-active-view="drag"] .showcase-viewport { aspect-ratio: 1920 / 358; }
.showcase-media { position: absolute; inset: 0; width: 100%; height: 100%; display: block; object-fit: cover; opacity: 0; transform: scale(0.99); pointer-events: none; transition: opacity 240ms ease, transform 340ms cubic-bezier(.2,.8,.2,1); }
.showcase-media[data-showcase="island"] { object-position: center top; }
.showcase-media.is-active { opacity: 1; transform: scale(1); pointer-events: auto; }
.showcase-video { background: #050506; }

.features-section { padding-top: 84px; }
.feature-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); border-top: 1px solid var(--line); }
.feature-list article { min-height: 170px; padding: 32px 38px 32px 0; display: grid; grid-template-columns: 52px minmax(0, 1fr); align-items: start; gap: 19px; border-bottom: 1px solid var(--line); }
.feature-list article:nth-child(odd) { border-right: 1px solid var(--line); }
.feature-list article:nth-child(even) { padding-right: 0; padding-left: 38px; }
.feature-symbol { width: 44px; height: 44px; display: grid; place-items: center; border-radius: 12px; }
.feature-symbol svg { width: 22px; height: 22px; }
.blue-symbol { color: #087ff5; background: rgba(8, 127, 245, 0.11); }
.green-symbol { color: #24a466; background: rgba(36, 164, 102, 0.11); }
.violet-symbol { color: #7a64e8; background: rgba(122, 100, 232, 0.11); }
.cyan-symbol { color: #1aa0c9; background: rgba(26, 160, 201, 0.11); }
.mint-symbol { color: #16a57a; background: rgba(22, 165, 122, 0.11); }
.amber-symbol { color: #d48a08; background: rgba(212, 138, 8, 0.11); }
.rose-symbol { color: #db5b76; background: rgba(219, 91, 118, 0.11); }
.feature-list h3 { margin: 0; font-size: 18px; line-height: 1.35; font-weight: 680; }
.feature-list p { max-width: 440px; margin: 7px 0 0; color: var(--secondary); font-size: 14px; line-height: 1.58; }
.feature-benefit { display: inline-block; margin-top: 14px; color: var(--blue); font-size: 12px; font-weight: 620; }

.lyrics-section { padding-top: 92px; }
.lyrics-showcase { margin: 0; }
.lyrics-viewport {
  position: relative;
  aspect-ratio: 735 / 109;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: #08090b;
  box-shadow: 0 20px 64px rgba(22, 26, 34, 0.09);
}
.lyrics-media {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
  opacity: 0;
  transform: scale(0.992);
  pointer-events: none;
  transition: opacity 220ms ease, transform 320ms cubic-bezier(.2,.8,.2,1);
}
.lyrics-media.is-active { opacity: 1; transform: scale(1); pointer-events: auto; }
.lyrics-showcase figcaption { margin-top: 14px; display: flex; justify-content: space-between; color: var(--tertiary); font-size: 12px; }

.pro-section { position: relative; padding: 110px max(24px, calc((100vw - 1120px) / 2)); color: #f5f5f7; background: #08090b; }
.section-anchor { position: absolute; top: -88px; left: 0; width: 1px; height: 1px; pointer-events: none; }
.pro-inner { display: grid; grid-template-columns: 1fr 420px; gap: 90px; align-items: center; }
.pro-copy > p:not(.eyebrow) { color: #a1a1a6; }
.pricing-display { margin-top: 28px; display: flex; align-items: baseline; gap: 13px; }
.pricing-display > span { color: #a1a1a6; font-size: 13px; font-weight: 600; }
.pricing-display strong { display: inline-flex; align-items: flex-start; color: #fff; font-size: 45px; line-height: 1; font-weight: 720; font-variant-numeric: tabular-nums; }
.pricing-display strong small { margin: 5px 3px 0 0; font-size: 18px; font-weight: 650; }
.pricing-display em { color: #86868b; font-size: 12px; font-style: normal; }
.pro-copy ul { margin: 28px 0 0; padding: 0; display: grid; gap: 14px; list-style: none; color: #d2d2d7; }
.pro-copy li { display: flex; align-items: center; gap: 10px; }
.pro-copy li svg { width: 18px; height: 18px; color: #32d583; }
.license-panel { padding: 24px; border: 1px solid rgba(255,255,255,.12); border-radius: 18px; background: rgba(255,255,255,.055); box-shadow: 0 24px 70px rgba(0,0,0,.34); backdrop-filter: blur(20px); }
.license-header { display: flex; align-items: center; gap: 13px; }
.license-header img { border-radius: 13px; }
.license-header div { flex: 1; display: flex; flex-direction: column; gap: 3px; }
.license-header div span { color: #8e8e93; font-size: 12px; }
.license-header em { padding: 5px 8px; border-radius: 7px; color: #78b7ff; background: rgba(41,151,255,.15); font-size: 10px; font-style: normal; font-weight: 800; }
.license-panel label { margin-top: 23px; padding: 13px 15px; display: flex; flex-direction: column; gap: 6px; border: 1px solid rgba(255,255,255,.1); border-radius: 11px; background: rgba(0,0,0,.28); }
.license-panel label span, .license-panel small { color: #8e8e93; font-size: 11px; }
.license-panel label b { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: 0; }
.license-scope { margin: 18px 0 0; color: #b6b6bb; font-size: 13px; line-height: 1.5; }
.license-button { width: 100%; height: 44px; margin-top: 13px; display: flex; align-items: center; justify-content: center; gap: 8px; border: 0; border-radius: 11px; color: #fff; background: #1675de; font-weight: 650; cursor: pointer; transition: background 160ms ease, transform 160ms ease, opacity 160ms ease; }
.license-button:hover:not(:disabled) { background: #2586ed; }
.license-button:active:not(:disabled) { transform: scale(.985); }
.license-button:disabled { opacity: .45; cursor: not-allowed; }
.license-button svg { width: 17px; height: 17px; }
.license-price { display: block; margin-top: 10px; color: #d2d2d7; text-align: center; font-size: 13px; font-weight: 650; }
.license-panel small { display: block; margin-top: 11px; text-align: center; }

body.checkout-open { overflow: hidden; }
.checkout-backdrop {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: grid;
  place-items: center;
  padding: 24px;
  background: rgba(12, 14, 18, .36);
  backdrop-filter: blur(14px) saturate(120%);
  opacity: 0;
  transition: opacity 180ms ease;
}
.checkout-backdrop.is-visible { opacity: 1; }
.checkout-dialog {
  position: relative;
  width: min(470px, 100%);
  max-height: min(720px, calc(100vh - 48px));
  overflow: auto;
  padding: 30px;
  border: 1px solid var(--line-strong);
  border-radius: 22px;
  color: var(--ink);
  background: color-mix(in srgb, var(--surface-solid) 94%, transparent);
  box-shadow: 0 30px 90px rgba(10, 14, 22, .24), 0 2px 10px rgba(10, 14, 22, .08);
  transform: translateY(10px) scale(.985);
  transition: transform 220ms cubic-bezier(.2,.8,.2,1);
}
.checkout-backdrop.is-visible .checkout-dialog { transform: translateY(0) scale(1); }
.checkout-close { position: absolute; top: 18px; right: 18px; width: 34px; height: 34px; display: grid; place-items: center; border: 0; border-radius: 50%; color: var(--secondary); background: var(--control); cursor: pointer; }
.checkout-close:hover { color: var(--ink); background: color-mix(in srgb, var(--control) 75%, var(--line-strong)); }
.checkout-close svg { width: 17px; height: 17px; }
.checkout-heading { padding-right: 46px; display: flex; align-items: center; gap: 15px; }
.checkout-heading img { border-radius: 14px; box-shadow: var(--shadow-soft); }
.checkout-heading span { color: var(--blue); font-size: 12px; font-weight: 700; }
.checkout-heading h2 { margin: 3px 0 0; font-size: 25px; line-height: 1.15; letter-spacing: 0; }
.checkout-description { margin: 24px 0 18px; color: var(--secondary); font-size: 14px; line-height: 1.55; }
.checkout-field { display: grid; gap: 8px; color: var(--ink); font-size: 13px; font-weight: 650; }
.checkout-field input { width: 100%; height: 46px; padding: 0 14px; border: 1px solid var(--line-strong); border-radius: 11px; color: var(--ink); background: var(--page-elevated); font: inherit; outline: none; }
.checkout-field input:focus { border-color: color-mix(in srgb, var(--blue) 64%, transparent); box-shadow: 0 0 0 3px color-mix(in srgb, var(--blue) 14%, transparent); }
.checkout-field small { color: var(--tertiary); font-size: 11px; font-weight: 450; }
.payment-channels { margin: 22px 0 0; padding: 0; border: 0; }
.payment-channels legend { margin-bottom: 10px; color: var(--secondary); font-size: 12px; font-weight: 650; }
.payment-channels label { position: relative; min-height: 52px; padding: 9px 12px; display: flex; align-items: center; gap: 11px; border: 1px solid var(--line); background: var(--control); cursor: pointer; }
.payment-channels label:first-of-type { border-radius: 12px 12px 0 0; }
.payment-channels label:last-of-type { margin-top: -1px; border-radius: 0 0 12px 12px; }
.payment-channels input { position: absolute; opacity: 0; pointer-events: none; }
.payment-channels label:has(input:checked) { z-index: 1; border-color: color-mix(in srgb, var(--blue) 55%, transparent); background: color-mix(in srgb, var(--blue-soft) 70%, var(--surface-solid)); }
.channel-mark { width: 32px; height: 32px; display: grid; place-items: center; border-radius: 9px; color: #fff; font-size: 13px; font-weight: 800; }
.alipay-mark { background: #1677ff; }
.wechat-mark { background: #07c160; }
.payment-channels b { font-size: 14px; font-weight: 620; }
.payment-channels i { width: 16px; height: 16px; margin-left: auto; border: 1.5px solid var(--line-strong); border-radius: 50%; }
.payment-channels input:checked ~ i { border: 5px solid var(--blue); }
.checkout-summary { margin-top: 22px; display: flex; align-items: baseline; justify-content: space-between; color: var(--secondary); font-size: 13px; }
.checkout-summary strong { color: var(--ink); font-size: 24px; }
.checkout-error { margin: 12px 0 0; color: #e5484d; font-size: 12px; line-height: 1.45; }
.checkout-submit, .checkout-secondary { width: 100%; min-height: 46px; margin-top: 18px; border: 0; border-radius: 12px; font-size: 14px; font-weight: 650; cursor: pointer; }
.checkout-submit { display: flex; align-items: center; justify-content: center; gap: 8px; color: #fff; background: var(--blue); }
.checkout-submit:hover:not(:disabled) { background: var(--blue-hover); }
.checkout-submit:disabled { opacity: .45; cursor: not-allowed; }
.checkout-submit svg { width: 17px; height: 17px; }
.checkout-result { padding: 34px 2px 4px; text-align: center; }
.checkout-spinner { width: 36px; height: 36px; margin: 0 auto 18px; border: 3px solid var(--control); border-top-color: var(--blue); border-radius: 50%; animation: checkout-spin .9s linear infinite; }
.checkout-result h3 { margin: 0; font-size: 22px; }
.checkout-result > p { max-width: 340px; margin: 10px auto 0; color: var(--secondary); font-size: 14px; line-height: 1.55; }
.activation-result { margin-top: 22px; padding: 16px; display: grid; gap: 10px; border: 1px solid color-mix(in srgb, var(--green) 28%, transparent); border-radius: 13px; background: color-mix(in srgb, var(--green) 8%, var(--surface-solid)); }
.activation-result span { color: var(--secondary); font-size: 11px; }
.activation-result code { color: var(--ink); font-size: 15px; font-weight: 700; overflow-wrap: anywhere; user-select: all; }
.activation-result button { width: fit-content; margin: 0 auto; padding: 6px 10px; border: 0; border-radius: 8px; color: var(--blue); background: var(--blue-soft); font-size: 12px; font-weight: 650; cursor: pointer; }
.checkout-secondary { color: var(--blue); background: var(--control); }
@keyframes checkout-spin { to { transform: rotate(360deg); } }

.faq-section { max-width: 900px; }
.faq-list { border-top: 1px solid var(--line); }
.faq-list details { padding: 22px 2px; border-bottom: 1px solid var(--line); }
.faq-list summary { cursor: pointer; font-size: 17px; font-weight: 650; }
.faq-list p { margin: 13px 0 0; color: var(--secondary); line-height: 1.65; }
.final-cta { padding: 100px 24px 110px; display: flex; flex-direction: column; align-items: center; text-align: center; background: var(--page-elevated); }
.final-cta img { margin-bottom: 24px; border-radius: 18px; box-shadow: var(--shadow-soft); }
.final-cta p { margin: 15px 0 0; color: var(--secondary); font-size: 17px; }
.final-cta .primary-button { margin-top: 24px; }
.final-cta code { max-width: calc(100% - 32px); margin-top: 20px; color: var(--tertiary); font-size: 9px; overflow-wrap: anywhere; }
footer { min-height: 94px; padding: 0 max(24px, calc((100vw - 1120px) / 2)); display: flex; align-items: center; justify-content: space-between; gap: 24px; color: var(--tertiary); font-size: 12px; border-top: 1px solid var(--line); }
.footer-brand { color: var(--ink); }
.footer-brand img { border-radius: 8px; }
footer > div:last-child { display: flex; gap: 20px; }
footer a:hover { color: var(--ink); }

@media (max-width: 900px) {
  .site-header nav { display: none; }
  .hero { padding-top: 132px; }
  .hero-product { margin-top: 54px; }
  .pro-inner { grid-template-columns: 1fr; gap: 44px; }
  .license-panel { max-width: 520px; }
  .feature-list { grid-template-columns: 1fr; }
  .feature-list article, .feature-list article:nth-child(even) { min-height: 142px; padding: 24px 0; grid-template-columns: 52px 1fr; border-right: 0; }
}

@media (max-width: 620px) {
  .site-header { top: 8px; width: calc(100% - 16px); height: 56px; padding-left: 10px; gap: 8px; }
  .brand { margin-right: auto; }
  .brand img { width: 31px; height: 31px; }
  .header-actions { gap: 2px; }
  .header-download { width: 38px; padding: 0; }
  .header-download span { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); }
  .hero { min-height: auto; padding: 120px 18px 64px; }
  .hero h1 strong { font-size: 42px; }
  .hero-description { font-size: 16px; }
  .hero-actions { flex-direction: column; gap: 9px; }
  .hero-actions .primary-button { width: 100%; }
  .hero-product { width: calc(100vw - 20px); margin-top: 42px; }
  .display-bezel { padding: 6px; border-radius: 18px; }
  .display-bezel video { border-radius: 11px; }
  .principles { grid-template-columns: 1fr; padding: 12px 0; }
  .principles div { padding: 14px 0; border-right: 0; border-bottom: 1px solid var(--line); }
  .principles div:last-child { border-bottom: 0; }
  .page-section { width: calc(100% - 28px); padding: 82px 0; }
  .section-heading h2, .pro-copy h2, .final-cta h2 { font-size: 36px; }
  .showcase { border-radius: 14px; }
  .showcase-viewport { aspect-ratio: 16 / 4; }
  .showcase-media[data-showcase="island"] { object-fit: cover; object-position: center top; }
  .showcase[data-active-view="drag"] .showcase-viewport { aspect-ratio: 16 / 4; }
  .showcase-media[data-showcase="drag"] { object-fit: cover; object-position: center; }
  .view-switcher, .lyrics-switcher { width: 100%; }
  .view-switcher button, .lyrics-switcher button { flex: 1; min-width: 0; }
  .lyrics-viewport { border-radius: 13px; }
  .lyrics-viewport { aspect-ratio: 16 / 5; }
  .lyrics-media { object-fit: cover; object-position: center top; }
  .lyrics-media[data-lyrics="desktop"] { object-position: left center; }
  .lyrics-showcase figcaption { padding: 0 3px; }
  .feature-list article { grid-template-columns: 44px 1fr; gap: 14px; }
  .feature-symbol { width: 40px; height: 40px; }
  .pro-section { padding: 82px 18px; }
  .license-panel { padding: 19px; }
  .checkout-backdrop { padding: 10px; align-items: end; }
  .checkout-dialog { max-height: calc(100vh - 20px); padding: 24px 20px 22px; border-radius: 20px; }
  .checkout-heading h2 { font-size: 22px; }
  footer { padding: 28px 20px; flex-direction: column; text-align: center; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
}

@media (prefers-reduced-transparency: reduce) {
  .site-header, .checkout-backdrop { backdrop-filter: none; }
  .site-header { background: var(--page-elevated); }
  .license-panel { background: #171719; backdrop-filter: none; }
}

@media (prefers-contrast: more) {
  .site-header, .showcase, .license-panel { border-color: var(--line-strong); }
}