@charset "UTF-8";

:root {
  --ink: #0a0b0e;
  --ink-soft: #12141a;
  --paper: #f1f3f2;
  --paper-dim: #9ea4ad;
  --line: rgba(255, 255, 255, 0.08);
  --line-dark: rgba(0, 0, 0, 0.2);
  --accent: #9bc8d1;
  --accent-strong: #79b5c0;
  --measure: 1140px;
}

* { box-sizing: border-box; }
html {
  background: var(--ink);
  color-scheme: dark;
  scroll-behavior: smooth;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}
body {
  position: relative;
  margin: 0;
  background: transparent;
  color: var(--paper);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Display", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  line-height: 1.6;
  overflow-x: hidden;
}
a { color: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
button { font: inherit; }
::selection { background: rgba(155, 200, 209, .3); color: #fff; }
::-webkit-scrollbar { width: 7px; height: 7px; }
::-webkit-scrollbar-track { background: var(--ink); }
::-webkit-scrollbar-thumb { background: rgba(255, 255, 255, .15); border-radius: 8px; }
::-webkit-scrollbar-thumb:hover { background: rgba(255, 255, 255, .28); }

/* Ambient Canvas Backdrop */
.ambient-backdrop {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}
.ambient-glow {
  position: absolute;
  inset: 0;
  background: radial-gradient(120% 80% at 50% -8%, rgba(68, 72, 88, 0.35) 0%, rgba(10, 11, 14, 0) 65%);
}
.ambient-canvas {
  display: block;
  width: 100%;
  height: 100%;
  position: absolute;
  inset: 0;
  pointer-events: none;
}

header, main, footer, .skip-link {
  position: relative;
  z-index: 1;
}

[data-lang-content] { display: none; }
html[lang="zh-Hans"] [data-lang-content="zh-Hans"], html[lang="zh-Hant"] [data-lang-content="zh-Hant"], html[lang="en"] [data-lang-content="en"], html[lang="ja"] [data-lang-content="ja"] { display: block; }
html[lang="zh-Hans"] span[data-lang-content="zh-Hans"], html[lang="zh-Hant"] span[data-lang-content="zh-Hant"], html[lang="en"] span[data-lang-content="en"], html[lang="ja"] span[data-lang-content="ja"] { display: inline; }

.skip-link {
  position: fixed;
  top: 10px;
  left: 14px;
  z-index: 100;
  padding: 8px 14px;
  background: var(--paper);
  color: #000;
  border-radius: 8px;
  transform: translateY(-160%);
  transition: transform .2s ease;
}
.skip-link:focus { transform: translateY(0); }

/* Floating Frosted Top Nav */
.site-nav {
  position: sticky;
  top: 16px;
  z-index: 40;
  width: min(var(--measure), calc(100% - 40px));
  margin: 16px auto 0;
  background: rgba(10, 11, 14, 0.6);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 20px;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.07), 0 16px 40px -16px rgba(0, 0, 0, 0.75);
}
.nav-inner {
  width: 100%;
  min-height: 58px;
  padding: 0 18px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand-lockup {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  text-decoration: none;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0;
  white-space: nowrap;
}
.brand-lockup img {
  width: 32px;
  height: 32px;
  border-radius: 9px;
  display: block;
}
.brand-name { display: inline-flex; align-items: center; gap: 7px; }
.brand-cn { font-weight: 700; }
.brand-slash { color: var(--accent); font-weight: 400; }
.desktop-nav { display: flex; align-items: center; gap: 24px; margin-left: auto; }
.site-nav-link {
  color: var(--paper-dim);
  font-size: 13px;
  text-decoration: none;
  transition: color .2s ease;
}
.site-nav-link:hover, .site-nav-link:focus-visible { color: var(--paper); }
.nav-actions { display: flex; align-items: center; gap: 10px; }
.language-switcher {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.03);
  border-radius: 12px;
  padding: 3px;
}
.language-switcher button {
  appearance: none;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: var(--paper-dim);
  min-width: 32px;
  min-height: 30px;
  padding: 4px 6px;
  font-size: 11px;
  cursor: pointer;
  transition: background .2s ease, color .2s ease;
}
.language-switcher button:hover, .language-switcher button[aria-current="true"] {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
}
.menu-toggle {
  display: none;
  appearance: none;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.03);
  border-radius: 12px;
  color: var(--paper);
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}
.menu-icon { position: relative; width: 18px; height: 14px; }
.menu-icon span {
  position: absolute;
  left: 0;
  width: 18px;
  height: 1.5px;
  background: currentColor;
  transition: transform .2s ease, top .2s ease;
}
.menu-icon span:first-child { top: 3px; }
.menu-icon span:last-child { top: 10px; }
.menu-toggle[aria-expanded="true"] .menu-icon span:first-child { top: 6.5px; transform: rotate(45deg); }
.menu-toggle[aria-expanded="true"] .menu-icon span:last-child { top: 6.5px; transform: rotate(-45deg); }
.mobile-menu {
  display: none;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 12px 20px 20px;
}
.mobile-menu a {
  display: flex;
  min-height: 44px;
  align-items: center;
  color: var(--paper-dim);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  font-size: 14px;
}
.mobile-language-switcher {
  display: none;
  grid-template-columns: repeat(4, 40px);
  gap: 8px;
  padding-top: 16px;
}
.mobile-language-switcher button {
  appearance: none;
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.04);
  color: var(--paper-dim);
  cursor: pointer;
}
.mobile-language-switcher button[aria-current="true"] {
  border-color: var(--accent);
  background: rgba(155, 200, 209, 0.12);
  color: var(--paper);
}

/* Hero Section */
.hero-section {
  position: relative;
  min-height: min(740px, calc(100dvh - 120px));
  width: min(var(--measure), calc(100% - 48px));
  margin: 0 auto;
  padding: clamp(50px, 7vh, 76px) 0 56px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.hero-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(260px, .65fr);
  align-items: center;
  gap: clamp(56px, 9vw, 132px);
}
.hero-inner { max-width: 720px; }
.hero-mark { display: flex; gap: 5px; margin-bottom: 28px; }
.hero-mark span { display: block; width: 32px; height: 5px; border-radius: 3px; background: var(--accent); }
.hero-mark span:nth-child(2) { width: 15px; opacity: .66; }
.hero-mark span:nth-child(3) { width: 6px; opacity: .38; }
.hero-kicker, .section-label { margin: 0 0 18px; color: var(--accent); font-size: 12px; letter-spacing: .05em; font-weight: 600; }
.hero-section h1 {
  max-width: 11ch;
  margin: 0;
  font-size: clamp(70px, 7.2vw, 100px);
  line-height: 1.02;
  letter-spacing: -0.02em;
  font-weight: 650;
  text-wrap: balance;
}
.hero-section h1 em { color: var(--accent); font-style: normal; }

/* Hand-Drawn SVG Animated Underline */
.hero-highlight {
  position: relative;
  display: inline-block;
}
.hero-stroke {
  position: absolute;
  left: 0;
  bottom: -8px;
  width: 100%;
  height: 14px;
  overflow: visible;
  pointer-events: none;
}
@keyframes stroke-in {
  from { stroke-dashoffset: 1; }
  to { stroke-dashoffset: 0; }
}
.hero-stroke path {
  animation: stroke-in 900ms cubic-bezier(0.16, 1, 0.3, 1) 350ms both;
}

.hero-copy {
  max-width: 48ch;
  margin: 28px 0 0;
  color: var(--paper-dim);
  font-size: clamp(16px, 1.5vw, 19px);
  line-height: 1.62;
}
.availability {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 24px 0 0;
  color: var(--paper);
  font-size: 13px;
  font-weight: 600;
}
.hero-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 18px;
  margin-top: 32px;
}

/* Mos-style Buttons */
.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 22px;
  border-radius: 16px;
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.01em;
  transition: transform .2s ease, background .2s ease, border-color .2s ease, box-shadow .2s ease;
}
.button svg, .text-link svg { width: 15px; height: 15px; }
.button-primary {
  background: linear-gradient(180deg, #ffffff 0%, rgba(255, 255, 255, 0.88) 100%);
  color: #000000;
  border: 1px solid rgba(0, 0, 0, 0.1);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.9), 0 12px 30px -8px rgba(0, 0, 0, 0.6);
}
.button-primary:hover {
  background: #ffffff;
  transform: translateY(-2px);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.9), 0 18px 36px -8px rgba(0, 0, 0, 0.7);
}
.button-primary:active { transform: translateY(0); }
.link-arrow {
  position: relative;
  width: 10px;
  height: 10px;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
}
.link-arrow-down { transform: rotate(45deg) translateY(-2px); }
.text-link {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  gap: 8px;
  padding: 12px 20px;
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.05);
  color: rgba(255, 255, 255, 0.85);
  font-size: 14px;
  font-weight: 550;
  text-decoration: none;
  transition: background .2s ease, border-color .2s ease, color .2s ease, transform .2s ease;
}
.text-link:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
  color: #ffffff;
  transform: translateY(-1px);
}
.hero-product {
  position: relative;
  min-width: 0;
  margin: 0;
  display: grid;
  justify-items: center;
}
.hero-product::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 440px;
  height: 520px;
  transform: translate(-50%, -50%);
  background: radial-gradient(circle, rgba(155, 200, 209, 0.22) 0%, rgba(58, 60, 72, 0.12) 50%, transparent 72%);
  filter: blur(52px);
  pointer-events: none;
  z-index: 0;
}
.hero-screen {
  position: relative;
  z-index: 1;
  width: min(100%, 330px);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 24px;
  background: #000;
  aspect-ratio: 1206 / 2622;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.15), 0 32px 80px -16px rgba(0, 0, 0, 0.85);
}
.hero-screen picture, .hero-screen img { display: block; width: 100%; height: 100%; }
.hero-screen img { object-fit: contain; }
.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px rgba(155, 200, 209, .15);
}

/* Sections */
.section {
  width: min(var(--measure), calc(100% - 48px));
  margin: 0 auto;
  padding: 140px 0;
  border-top: 1px solid var(--line);
}
.section-product {
  display: grid;
  grid-template-columns: minmax(240px, 1fr) minmax(0, 1.25fr);
  gap: clamp(48px, 10vw, 150px);
}
.section-intro h2, .quiet-content h2, .contact-block h2 {
  margin: 0;
  font-size: 68px;
  line-height: 1.05;
  letter-spacing: -0.015em;
  font-weight: 640;
  text-wrap: balance;
}
.product-body { padding-top: 45px; }
.lede {
  max-width: 50ch;
  margin: 0 0 48px;
  color: var(--paper);
  font-size: 25px;
  line-height: 1.45;
  letter-spacing: -0.01em;
}

/* Mos-style Frosted Glass Cards */
.album-pair {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
  border-block: none;
  background: transparent;
}
.album-pair article {
  min-width: 0;
  padding: 36px 34px 40px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 24px;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.06), 0 20px 50px -15px rgba(0, 0, 0, 0.6);
  transition: background .25s ease, border-color .25s ease, transform .25s ease;
}
.album-pair article:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.15);
  transform: translateY(-2px);
}
.album-pair article + article {
  border-left: 1px solid rgba(255, 255, 255, 0.08);
  padding-left: 34px;
}
.album-pair h3 {
  margin: 0 0 12px;
  font-size: 21px;
  line-height: 1.3;
  font-weight: 620;
  letter-spacing: 0;
}
.album-pair p {
  margin: 0;
  color: var(--paper-dim);
  font-size: 14.5px;
  line-height: 1.7;
}

.principle-line {
  display: grid;
  grid-template-columns: 38px 1fr;
  gap: 18px;
  padding: 20px 0;
  border-top: 1px solid var(--line);
  color: var(--paper-dim);
  font-size: 15px;
}
.principle-line:last-child { border-bottom: 1px solid var(--line); }
.line-index { color: var(--accent); font-size: 11px; letter-spacing: .05em; padding-top: 3px; }

.section-principles {
  display: grid;
  grid-template-columns: minmax(240px, .85fr) minmax(0, 1.5fr);
  gap: clamp(48px, 10vw, 150px);
}
.principle-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  padding-top: 45px;
}
.principle-grid article {
  padding: 32px 26px 34px;
  border-top: none;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: 20px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05);
  transition: background .3s ease, border-color .3s ease, transform .3s ease;
}
.principle-grid article:hover {
  background: rgba(255, 255, 255, 0.055);
  border-color: rgba(155, 200, 209, 0.35);
  transform: translateY(-2px);
}
.principle-number {
  display: inline-block;
  color: var(--accent);
  font-size: 11px;
  letter-spacing: .08em;
  margin-bottom: 42px;
}
.principle-grid h3 {
  margin: 0 0 12px;
  font-size: 19px;
  line-height: 1.2;
  font-weight: 600;
  letter-spacing: 0;
}
.principle-grid p {
  margin: 0;
  color: var(--paper-dim);
  font-size: 14px;
  line-height: 1.65;
}

.section-quiet {
  display: grid;
  grid-template-columns: minmax(110px, .35fr) minmax(0, 1.65fr);
  gap: 40px;
  padding-bottom: 170px;
}
.quiet-rule {
  width: 40px;
  height: 1px;
  margin-top: 11px;
  background: var(--accent);
}
.quiet-content { max-width: 720px; }
.quiet-copy {
  max-width: 55ch;
  margin: 32px 0 0;
  color: var(--paper-dim);
  font-size: 16px;
}
.section-contact { padding-top: 100px; padding-bottom: 120px; }
.section-ui {
  display: grid;
  grid-template-columns: minmax(220px, .7fr) minmax(0, 1.5fr);
  gap: clamp(40px, 8vw, 120px);
  align-items: start;
}
.section-ui .section-intro { position: sticky; top: 112px; }
.section-copy {
  max-width: 36ch;
  margin: 28px 0 0;
  color: var(--paper-dim);
  font-size: 14px;
  line-height: 1.68;
}
.ui-intro {
  max-width: 34ch;
  margin: 28px 0 0;
  color: var(--paper-dim);
  font-size: 14px;
  line-height: 1.65;
}

.feature-showcase { padding-bottom: 130px; }
.showcase-header { max-width: 780px; margin-bottom: 72px; }
.showcase-header h2 {
  margin: 0;
  font-size: clamp(46px, 5.1vw, 68px);
  line-height: 1.06;
  font-weight: 640;
  letter-spacing: -0.015em;
  text-wrap: balance;
}
.feature-grid { border-top: 1px solid var(--line); }
.feature-proof {
  min-width: 0;
  display: grid;
  grid-template-columns: minmax(260px, .8fr) minmax(420px, 1.2fr);
  align-items: center;
  gap: clamp(52px, 8vw, 116px);
  min-height: 560px;
  padding: 62px 0;
  border-bottom: 1px solid var(--line);
}
.feature-proof:nth-child(even) .proof-media { order: -1; }
.proof-copy { min-width: 0; }

/* Mos-style 01 + line section badge */
.proof-index {
  display: flex !important;
  align-items: center !important;
  gap: 12px !important;
  margin: 0 0 20px !important;
  color: rgba(255, 255, 255, 0.55) !important;
  font: 11px/1 ui-monospace, SFMono-Regular, Menlo, monospace !important;
  letter-spacing: 0.3em !important;
}
.proof-index::after {
  content: "";
  display: block;
  width: 40px;
  height: 1px;
  background: linear-gradient(90deg, rgba(255, 255, 255, 0.35), transparent);
}

.proof-copy h3 {
  max-width: 18ch;
  margin: 0 0 18px;
  font-size: clamp(28px, 3.2vw, 42px);
  line-height: 1.14;
  font-weight: 640;
  letter-spacing: -0.01em;
  text-wrap: balance;
}
.proof-copy p {
  max-width: 50ch;
  margin: 0;
  color: var(--paper-dim);
  font-size: 15px;
  line-height: 1.72;
}

/* Feature Proof Media Backdrop Glow */
.proof-media {
  position: relative;
  height: 442px;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  isolation: isolate;
}
.proof-media::before {
  content: "";
  position: absolute;
  left: 10%;
  right: 10%;
  bottom: 0;
  height: 1px;
  background: rgba(255, 255, 255, 0.08);
}
.proof-media::after {
  content: "";
  position: absolute;
  top: 45%;
  left: 50%;
  width: 380px;
  height: 380px;
  transform: translate(-50%, -50%);
  background: radial-gradient(circle, rgba(155, 200, 209, 0.18) 0%, rgba(58, 60, 72, 0.1) 45%, transparent 70%);
  filter: blur(44px);
  pointer-events: none;
  z-index: 0;
}
.proof-shot {
  position: relative;
  z-index: 1;
  margin: 0;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 20px;
  background: #000;
  aspect-ratio: 1206 / 2622;
}
.proof-shot picture, .proof-shot img { display: block; width: 100%; height: 100%; }
.proof-shot img { object-fit: contain; }
.proof-shot-main {
  width: 220px;
  transform: translateX(-34px);
  box-shadow: 0 28px 70px -12px rgba(0, 0, 0, 0.8), inset 0 1px 0 rgba(255, 255, 255, 0.12);
}
.proof-shot-detail {
  width: 160px;
  z-index: 2;
  margin-left: -78px;
  transform: translate(78px, -24px);
  box-shadow: -20px 28px 60px rgba(0, 0, 0, 0.75), inset 0 1px 0 rgba(255, 255, 255, 0.14);
}
.proof-media-mixed .proof-shot-main { background: #000; }

.all-screens { padding-top: 100px; }
.all-screens-heading { width: min(100%, 680px); margin: 0 auto 34px; }
.all-screens-heading h3 {
  margin: 0;
  font-size: 30px;
  line-height: 1.2;
  font-weight: 640;
  letter-spacing: -0.01em;
}
.carousel-viewport {
  position: relative;
  width: min(100%, 680px);
  min-width: 0;
  margin: 0 auto;
  overflow: hidden;
  border-radius: 24px;
  background: radial-gradient(circle at 50% 35%, rgba(155, 200, 209, 0.08) 0%, transparent 65%);
}
.ui-gallery {
  display: flex;
  gap: 20px;
  align-items: flex-start;
  width: 100%;
  transition: transform .5s cubic-bezier(.2,.7,.2,1);
}
.ui-figure { margin: 0; }
.ui-gallery .ui-figure, .ui-gallery .ui-figure-tall {
  flex: 0 0 100%;
  display: grid;
  justify-items: center;
}
.ui-image-wrap {
  width: min(100%, 320px);
  overflow: hidden;
  background: #050607;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 22px;
  aspect-ratio: 1206 / 2622;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.1), 0 24px 60px -15px rgba(0, 0, 0, 0.75);
}
.ui-poster-wrap {
  width: min(100%, 340px);
  aspect-ratio: 1320 / 2868;
  border-radius: 26px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.15), 0 32px 80px -16px rgba(0, 0, 0, 0.85);
}
.ui-image-wrap picture, .ui-image-wrap img { display: block; width: 100%; height: 100%; }
.ui-image-wrap img {
  object-fit: contain;
  object-position: center;
  transition: transform .6s cubic-bezier(.2,.7,.2,1);
}
.ui-figure:hover .ui-image-wrap img { transform: scale(1.015); }
.ui-figure figcaption {
  width: min(100%, 340px);
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: center;
  gap: 9px;
  padding-top: 14px;
  color: var(--paper-dim);
  font-size: 13px;
  line-height: 1.45;
}
.carousel-button {
  position: absolute;
  top: 50%;
  z-index: 2;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 50%;
  background: rgba(10, 11, 14, 0.75);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  color: var(--paper);
  font-size: 20px;
  cursor: pointer;
  transform: translateY(-50%);
  transition: background .2s ease, border-color .2s ease, transform .2s ease;
}
.carousel-button:hover {
  background: #ffffff;
  color: #000000;
  border-color: #ffffff;
  transform: translateY(-50%) scale(1.05);
}
.carousel-arrow { width: 10px; height: 10px; border-top: 1.5px solid currentColor; border-right: 1.5px solid currentColor; }
.carousel-arrow-left { transform: rotate(-135deg); }
.carousel-arrow-right { transform: rotate(45deg); }
.carousel-previous { left: 12px; }
.carousel-next { right: 12px; }
.carousel-playback {
  top: 12px;
  left: 12px;
  width: 40px;
  height: 40px;
  transform: none;
  font-size: 0;
  border-radius: 12px;
}
.carousel-playback-icon { position: relative; width: 14px; height: 14px; }
.carousel-playback-icon::before, .carousel-playback-icon::after {
  content: "";
  position: absolute;
  top: 1px;
  width: 3px;
  height: 12px;
  background: currentColor;
}
.carousel-playback-icon::before { left: 2px; }
.carousel-playback-icon::after { right: 2px; }
.carousel-playback[aria-pressed="true"] .carousel-playback-icon::before {
  left: 3px;
  width: 0;
  height: 0;
  border-top: 7px solid transparent;
  border-bottom: 7px solid transparent;
  border-left: 11px solid currentColor;
  background: transparent;
  top: 0;
}
.carousel-playback[aria-pressed="true"] .carousel-playback-icon::after { display: none; }
.carousel-counter {
  position: absolute;
  top: 12px;
  right: 12px;
  z-index: 2;
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  padding: 6px 14px;
  background: rgba(10, 11, 14, 0.75);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  color: var(--paper-dim);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  font: 11px/1 ui-monospace, SFMono-Regular, Menlo, monospace;
}
.ui-route { color: var(--accent); font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 10px; letter-spacing: .02em; }
.ui-disclosure { grid-column: 2; margin: 28px 0 0; color: rgba(194, 201, 200, .65); font-size: 11px; line-height: 1.5; }
.ui-caption-en { display: none; }
html[lang="en"] .ui-caption-cn, html[lang="ja"] .ui-caption-cn { display: none; }
html[lang="en"] .ui-caption-en, html[lang="ja"] .ui-caption-en { display: inline; }

.contact-block { max-width: 660px; }
.contact-block > p:not(.section-label) {
  max-width: 52ch;
  margin: 26px 0 0;
  color: var(--paper-dim);
  font-size: 16px;
}
.contact-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 20px;
  margin-top: 36px;
}
.site-footer { border-top: 1px solid var(--line); }
.footer-inner {
  width: min(var(--measure), calc(100% - 48px));
  min-height: 92px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 28px;
}
.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-size: 13px;
  font-weight: 600;
}
.footer-brand img { width: 23px; height: 23px; border-radius: 6px; }
.footer-links { display: flex; gap: 20px; margin-left: auto; }
.footer-links a {
  color: var(--paper-dim);
  font-size: 12px;
  text-decoration: none;
  transition: color .2s ease;
}
.footer-links a:hover { color: var(--paper); }
.footer-note { margin: 0; color: rgba(194, 201, 200, .6); font-size: 11px; }

/* Scroll Reveal Animation */
.reveal-on-scroll {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1), transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}
.reveal-on-scroll.is-revealed {
  opacity: 1;
  transform: none;
}

/* Support and privacy documents */
.document-body {
  background-color: var(--ink);
  background-image: radial-gradient(120% 60% at 50% -8%, rgba(58, 60, 72, 0.18) 0%, rgba(10, 11, 14, 0) 56%);
  background-attachment: scroll;
}
.document-body .site-header {
  position: sticky;
  top: 16px;
  z-index: 40;
  width: min(100% - 40px, 860px);
  margin: 16px auto 0;
  background: rgba(10, 11, 14, 0.65);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 20px;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.07), 0 16px 40px -16px rgba(0, 0, 0, 0.75);
}
.document-body .header-inner, .document-body .page, .document-body .document-footer {
  width: min(100% - 40px, 820px);
  margin-inline: auto;
}
.document-body .header-inner {
  min-height: 58px;
  padding: 0 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.document-body .brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  color: var(--paper);
  font-size: 15px;
  font-weight: 650;
  text-decoration: none;
}
.document-body .brand img { width: 32px; height: 32px; border-radius: 8px; }
.document-body .primary-nav { display: flex; align-items: center; gap: 20px; }
.document-body .primary-nav a {
  color: var(--paper-dim);
  font-size: 13px;
  font-weight: 550;
  text-decoration: none;
  transition: color .2s ease;
}
.document-body .primary-nav a:hover, .document-body .primary-nav a[aria-current="page"] { color: var(--paper); }
.document-body .page { padding-block: 72px 110px; }
.document-body .privacy-page { width: min(100% - 40px, 1040px); }
.document-body .language-switcher {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  width: fit-content;
  margin: 0 0 64px;
  padding: 0;
  border: 0;
  background: transparent;
}
.document-body .language-switcher a {
  display: inline-flex;
  min-height: 38px;
  align-items: center;
  padding: 6px 14px;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.04);
  color: var(--paper-dim);
  font-size: 12px;
  font-weight: 600;
  text-decoration: none;
  transition: all .2s ease;
}
.document-body .language-switcher a:hover, .document-body .language-switcher a[aria-current="true"] {
  border-color: var(--accent);
  color: var(--paper);
  background: rgba(155, 200, 209, .12);
}
.document-body .language-panel:not(.is-active) { display: none; }
.document-body .document-header { margin-bottom: 48px; }
.document-body .eyebrow {
  margin: 0 0 18px;
  color: var(--accent);
  font-size: 16px;
  line-height: 1.3;
  font-weight: 680;
  letter-spacing: 0;
}
.document-body h1, .document-body h2, .document-body h3, .document-body p, .document-body ul { margin-top: 0; }
.document-body h1 {
  max-width: 18ch;
  margin-bottom: 22px;
  font-size: 52px;
  line-height: 1.08;
  letter-spacing: -0.015em;
}
.document-body h2 {
  margin-bottom: 12px;
  font-size: 21px;
  line-height: 1.3;
  letter-spacing: 0;
}
.document-body .lede {
  max-width: 62ch;
  margin-bottom: 0;
  color: var(--paper-dim);
  font-size: 18px;
  line-height: 1.65;
}
.document-body .document-section { padding-block: 30px; border-top: 1px solid var(--line); }
.document-body .document-section p:last-child, .document-body .document-section ul:last-child { margin-bottom: 0; }
.document-body .document-section p, .document-body .document-section li { color: var(--paper-dim); }
.document-body .document-section ul { padding-left: 1.3rem; }
.document-body .document-section li + li { margin-top: 9px; }
.document-body .meta { margin-top: 12px; color: rgba(194, 201, 200, .7); font-size: 13px; }
.document-body .contact-link {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  padding: 10px 20px;
  border-radius: 14px;
  background: linear-gradient(180deg, #fff 0%, rgba(255, 255, 255, 0.88) 100%);
  color: #000;
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  box-shadow: inset 0 1px 0 #fff, 0 12px 30px -8px rgba(0, 0, 0, 0.6);
  transition: transform .2s ease;
}
.document-body .contact-link:hover { transform: translateY(-2px); }
.document-body .privacy-header { max-width: 800px; margin-bottom: 46px; }
.document-body .privacy-header h1 { font-size: 58px; }
.document-body .policy-date {
  margin-bottom: 34px;
  color: var(--paper-dim);
  font-size: 13px;
  font-weight: 600;
}
.document-body .privacy-promise {
  max-width: 42ch;
  margin: 32px 0 0;
  color: var(--paper);
  font-size: 23px;
  line-height: 1.5;
  font-weight: 620;
}
.document-body .privacy-highlights {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin: 0 0 70px;
  padding: 26px 0;
  border-block: 1px solid var(--line);
  list-style: none;
}
.document-body .privacy-highlights li { min-width: 0; padding-inline: 26px; }
.document-body .privacy-highlights li:first-child { padding-left: 0; }
.document-body .privacy-highlights li + li { border-left: 1px solid var(--line); }
.document-body .privacy-highlights strong, .document-body .privacy-highlights span { display: block; }
.document-body .privacy-highlights strong { margin-bottom: 6px; font-size: 15px; }
.document-body .privacy-highlights span { color: var(--paper-dim); font-size: 13px; line-height: 1.55; }
.document-body .policy-group {
  display: grid;
  grid-template-columns: minmax(170px, .6fr) minmax(0, 1.6fr);
  gap: 56px;
  padding-block: 50px;
  border-top: 1px solid var(--line);
}
.document-body .policy-group-header span {
  display: block;
  margin-bottom: 10px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 700;
}
.document-body .policy-group-header h2 { margin: 0; }
.document-body .policy-topic h3 { margin-bottom: 10px; font-size: 17px; line-height: 1.4; }
.document-body .policy-topic p {
  max-width: 66ch;
  margin-bottom: 0;
  color: var(--paper-dim);
  font-size: 15px;
  line-height: 1.75;
}
.document-body .policy-topic + .policy-topic {
  margin-top: 30px;
  padding-top: 30px;
  border-top: 1px solid var(--line);
}
.document-body .document-footer {
  min-height: 96px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  color: var(--paper-dim);
  font-size: 12px;
}
.document-body .document-footer p { margin: 0; }
.document-body .document-footer a { text-underline-offset: 3px; }
a:focus-visible, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

@media (max-width: 820px) {
  .site-nav { width: min(100% - 32px, var(--measure)); top: 12px; margin-top: 12px; }
  .nav-inner { padding: 0 16px; min-height: 54px; }
  .hero-section, .section, .footer-inner { width: min(100% - 36px, var(--measure)); }
  .desktop-nav, .nav-actions > .language-switcher { display: none; }
  .menu-toggle { display: inline-flex; }
  .mobile-menu[hidden] { display: none; }
  .mobile-menu:not([hidden]) { display: block; }
  .mobile-language-switcher { display: grid; }
  .hero-section { min-height: auto; padding: 68px 0 54px; }
  .hero-layout { grid-template-columns: minmax(0, 1fr) minmax(180px, 220px); gap: 42px; }
  .hero-section h1 { font-size: 70px; }
  .hero-screen { width: min(100%, 220px); border-radius: 18px; }
  .section { padding: 100px 0; }
  .section-product, .section-principles { grid-template-columns: 1fr; gap: 44px; }
  .section-ui { grid-template-columns: 1fr; gap: 34px; }
  .section-ui .section-intro { position: static; }
  .ui-disclosure { grid-column: auto; }
  .showcase-header { margin-bottom: 54px; }
  .feature-proof { grid-template-columns: 1fr; gap: 38px; min-height: 0; padding: 54px 0 58px; }
  .feature-proof:nth-child(even) .proof-media { order: initial; }
  .proof-index { margin-bottom: 20px !important; }
  .proof-media { height: 410px; }
  .proof-shot-main { width: 204px; }
  .proof-shot-detail { width: 150px; }
  .product-body, .principle-grid { padding-top: 0; }
  .album-pair { grid-template-columns: 1fr; gap: 16px; }
  .album-pair article { padding: 28px 24px 30px; border-radius: 20px; }
  .album-pair article + article { padding-left: 24px; border-left: 1px solid rgba(255, 255, 255, 0.08); }
  .principle-grid { grid-template-columns: 1fr; gap: 16px; }
  .section-quiet { grid-template-columns: 40px 1fr; gap: 24px; padding-bottom: 110px; }
  .footer-inner { min-height: 116px; flex-wrap: wrap; align-content: center; gap: 12px 22px; }
  .footer-links { order: 3; width: 100%; margin-left: 0; }
  .footer-note { margin-left: auto; }
  .document-body .site-header { width: min(100% - 32px, 860px); top: 12px; margin-top: 12px; }
  .document-body .policy-group { grid-template-columns: 1fr; gap: 24px; }
  .document-body .privacy-highlights { grid-template-columns: 1fr; }
  .document-body .privacy-highlights li { padding: 18px 0; }
  .document-body .privacy-highlights li + li { border-left: 0; border-top: 1px solid var(--line); }
}

@media (max-width: 520px) {
  .site-nav { width: min(100% - 24px, var(--measure)); top: 10px; margin-top: 10px; border-radius: 16px; }
  .nav-inner { padding: 0 12px; min-height: 50px; }
  .brand-name { font-size: 14px; }
  .hero-section { padding: 36px 0 30px; }
  .hero-layout { position: relative; display: block; padding-bottom: 226px; }
  .hero-inner { max-width: none; }
  .hero-copy { margin-top: 22px; font-size: 15px; }
  .availability { margin-top: 18px; }
  .hero-actions { align-items: center; flex-direction: row; gap: 14px; margin-top: 22px; }
  .button { min-height: 44px; padding: 10px 18px; border-radius: 14px; font-size: 13px; }
  .text-link { min-height: 44px; padding: 10px 16px; border-radius: 14px; font-size: 13px; }
  .hero-section h1 { font-size: 48px; }
  html[lang="ja"] .hero-section h1 { font-size: 44px; }
  .hero-product { position: absolute; right: 0; bottom: 0; justify-items: end; }
  .hero-product::before { width: 180px; height: 220px; filter: blur(36px); }
  .hero-screen { width: 102px; border-radius: 14px; }
  .section-intro h2, .quiet-content h2, .contact-block h2 { font-size: 40px; }
  .showcase-header { margin-bottom: 42px; }
  .showcase-header h2 { font-size: 38px; }
  .feature-proof { gap: 28px; padding: 40px 0 44px; }
  .proof-copy h3 { font-size: 23px; }
  .proof-media { height: 322px; }
  .proof-media::after { width: 220px; height: 220px; filter: blur(30px); }
  .proof-shot { border-radius: 14px; }
  .proof-shot-main { width: 148px; transform: translateX(-20px); }
  .proof-shot-detail { width: 108px; margin-left: -50px; transform: translate(50px, -16px); box-shadow: -12px 16px 30px rgba(0, 0, 0, .45); }
  .all-screens { padding-top: 72px; }
  .all-screens-heading { margin-bottom: 24px; }
  .all-screens-heading h3 { font-size: 25px; }
  .lede { font-size: 20px; }
  .principle-grid { grid-template-columns: 1fr; }
  .ui-gallery { gap: 14px; }
  .ui-image-wrap, .ui-figure figcaption { width: min(100%, 280px); }
  .ui-image-wrap { border-radius: 16px; }
  .carousel-button { width: 40px; height: 40px; }
  .carousel-previous { left: 8px; }
  .carousel-next { right: 8px; }
  .principle-number { margin-bottom: 24px; }
  .section-quiet { grid-template-columns: 1fr; gap: 20px; }
  .quiet-rule { margin-top: 0; }
  .contact-actions { align-items: flex-start; flex-direction: column; gap: 16px; }
  .document-body .site-header { width: min(100% - 24px, 860px); top: 10px; margin-top: 10px; border-radius: 16px; }
  .document-body .header-inner, .document-body .page, .document-body .document-footer, .document-body .privacy-page { width: min(100% - 32px, 1040px); }
  .document-body .header-inner { min-height: 50px; padding: 0 12px; }
  .document-body .brand img { width: 28px; height: 28px; }
  .document-body .primary-nav { gap: 13px; }
  .document-body .primary-nav a { font-size: 12px; }
  .document-body .page { padding-block: 48px 84px; }
  .document-body .language-switcher { margin-bottom: 50px; }
  .document-body h1, .document-body .privacy-header h1 { font-size: 40px; }
  .document-body .eyebrow { font-size: 15px; }
  .document-body .privacy-promise { font-size: 20px; }
  .document-body .document-footer { min-height: 110px; flex-direction: column; align-items: flex-start; justify-content: center; gap: 6px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
    scroll-behavior: auto !important;
  }
}