/* Flagship refinement: isolated from the original six variants. */
:root {
  color-scheme: light;
  --canvas: #fffdf9; --surface: rgba(255,255,255,.88); --solid: #fff;
  --ink: #1e293b; --secondary: #475569; --muted: #667486;
  --line: #dce6df; --green: #157457; --green-soft: #e9f5ed;
  --pink: #bc3868; --pink-soft: #fff0f5; --blue: #5369a1;
  --shadow: 0 16px 44px rgba(45,73,61,.06);
  --body-font: "SF Pro Rounded",system-ui,-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
}
html[data-theme="dark"] {
  color-scheme: dark;
  --canvas: #171d1a; --surface: rgba(32,39,35,.96); --solid: #202723;
  --ink: #f2f8f4; --secondary: #b6c6be; --muted: #a6b7ae;
  --line: #46544d; --green: #8be0b6; --green-soft: #293f33;
  --pink: #f29cba; --pink-soft: #3d2934; --blue: #b0bdf7;
  --shadow: 0 18px 44px rgba(0,0,0,.12);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 24px; }
body { margin: 0; font-family: var(--body-font); color: var(--ink); background: var(--canvas); line-height: 1.6; -webkit-font-smoothing: antialiased; }
body.refined-site {
  background-image: radial-gradient(ellipse at 2% 8%,rgba(255,90,143,.07),transparent 30%),radial-gradient(ellipse at 95% 12%,rgba(52,211,153,.09),transparent 30%);
}
button,input,textarea { font: inherit; }
button,a { -webkit-tap-highlight-color: transparent; }
button { cursor: pointer; }
a { color: inherit; text-decoration: none; }
button { color: inherit; }
button:focus-visible,a:focus-visible,input:focus-visible,summary:focus-visible { outline: 3px solid var(--green); outline-offset: 4px; }
img { display: block; max-width: 100%; }
h1,h2,h3,p { margin: 0; }
.shell { width: min(1100px,calc(100% - 48px)); margin-inline: auto; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.skip-link { position: fixed; top: 10px; left: 12px; z-index: 50; padding: 10px 18px; border-radius: 8px; background: var(--solid); transform: translateY(-200%); }
.skip-link:focus { transform: translateY(0); }
.site-header { display: flex; align-items: center; justify-content: space-between; gap: 20px; min-height: 88px; }
.brand { display: flex; gap: 12px; align-items: center; flex-shrink: 0; font-size: 21px; font-weight: 750; letter-spacing: -.5px; }
.brand img { border-radius: 11px; box-shadow: 0 4px 12px rgba(45,73,61,.12); }
.brand small { display: block; font-size: 11px; font-weight: 450; letter-spacing: .2px; color: var(--secondary); margin-top: 1px; }
.header-nav { display: flex; gap: 26px; align-items: center; font-size: 13px; color: var(--secondary); }
.header-nav a:hover,.site-footer a:hover { color: var(--green); }
.header-actions { display: flex; gap: 8px; align-items: center; flex-shrink: 0; }
.quiet-button { border: 1px solid var(--line); background: var(--surface); border-radius: 20px; min-width: 40px; min-height: 36px; padding: 6px 12px; font-size: 12px; font-weight: 600; }
.header-release { padding: 8px 14px; border: 1px solid var(--line); border-radius: 20px; font-size: 12px; font-weight: 600; color: var(--green); background: var(--green-soft); }
.hero { text-align: center; padding: 34px 0 22px; }
.eyebrow { display: inline-flex; gap: 8px; align-items: center; font-size: 12px; color: var(--green); background: var(--surface); border: 1px solid var(--line); border-radius: 40px; padding: 6px 14px; }
.status-dot { display: inline-block; width: 6px; height: 6px; border-radius: 50%; background: var(--green); flex-shrink: 0; }
.hero h1 { margin: 18px auto 12px; font-size: clamp(32px,4vw,48px); line-height: 1.2; font-weight: 750; letter-spacing: -1.4px; }
.hero h1 > span { display: block; }
.hero-accent { color: var(--green); }
.hero-description { max-width: 580px; margin-inline: auto; font-size: 15px; color: var(--secondary); line-height: 1.7; text-wrap: balance; }
.hero-actions { display: flex; justify-content: center; flex-wrap: wrap; gap: 10px; margin-top: 18px; }
.button { display: inline-flex; justify-content: center; align-items: center; min-height: 44px; border: 1px solid var(--line); border-radius: 24px; padding: 10px 22px; font-size: 14px; font-weight: 650; transition: transform .15s,background-color .15s; }
.button:hover { transform: translateY(-2px); }
.button-primary { background: var(--green); border-color: var(--green); color: var(--canvas); }
.button-secondary { background: var(--surface); color: var(--ink); }
.compatibility { margin-top: 12px; font-size: 11px; color: var(--muted); }
.studio { max-width: 930px; scroll-margin-top: 24px; }
.studio-card { padding: 22px 24px 14px; border: 1px solid var(--line); border-radius: 26px; background: var(--surface); box-shadow: var(--shadow); }
.studio-heading { display: grid; grid-template-columns: minmax(0,1fr) auto; gap: 16px; align-items: center; margin-bottom: 14px; }
.section-kicker { text-transform: uppercase; letter-spacing: 1.5px; font-size: 11px; font-weight: 650; color: var(--green); margin-bottom: 5px; }
.studio-heading h2 { font-size: 17px; letter-spacing: -.3px; }
.companion { display: flex; gap: 8px; align-items: center; min-width: 0; }
.companion-bubble { max-width: 180px; padding: 7px 12px; background: var(--solid); border: 1px solid var(--line); border-radius: 15px 15px 4px 15px; font-size: 11px; color: var(--secondary); line-height: 1.5; }
.companion-button { display: grid; place-items: center; width: 50px; height: 50px; padding: 0; background: none; border: 0; border-radius: 50%; flex-shrink: 0; }
.companion-button.is-awake { animation: companion-nod .32s ease-out; }
@keyframes companion-nod { 45% { transform: translateY(-3px) rotate(-5deg); } }
.sound-visual { border: 1px solid var(--line); border-radius: 16px; overflow: hidden; background: var(--solid); margin-bottom: 14px; }
.visual-toolbar { display: flex; gap: 12px; justify-content: space-between; align-items: center; padding: 8px 12px 0; }
.visual-label { display: flex; align-items: center; gap: 6px; font-size: 10px; color: var(--muted); }
.segmented { display: flex; gap: 3px; align-items: center; padding: 3px; background: var(--canvas); border: 1px solid var(--line); border-radius: 18px; }
.segmented button { padding: 4px 10px; border: 0; border-radius: 14px; background: transparent; font-size: 11px; color: var(--secondary); white-space: nowrap; min-height: 28px; }
.segmented [aria-pressed="true"],.segmented [aria-selected="true"] { background: var(--green-soft); color: var(--green); font-weight: 650; }
#refined-canvas { display: block; width: 100%; height: 90px; }
.trial-actions { display: flex; justify-content: space-between; align-items: center; gap: 10px; margin-bottom: 7px; font-size: 12px; }
.trial-actions label { font-weight: 600; }
.trial-actions > div { display: flex; gap: 10px; }
.text-button { border: none; background: transparent; padding: 5px 2px; font-size: 11px; font-weight: 550; color: var(--secondary); min-height: 30px; }
.text-button:hover { color: var(--green); }
#trial-input { display: block; width: 100%; height: 72px; padding: 13px 15px; border: 1px solid var(--line); border-radius: 14px; background: var(--canvas); color: var(--ink); resize: none; line-height: 1.6; font-size: 14px; }
#trial-input::placeholder { color: var(--muted); opacity: 1; }
#trial-input:focus { outline: 2px solid var(--green); outline-offset: 1px; }
.trial-controls { display: grid; grid-template-columns: minmax(0,1fr) auto; gap: 12px; align-items: center; padding: 12px 0 10px; }
.space-options { display: flex; gap: 6px; flex-wrap: wrap; }
.sound-chip { padding: 6px 11px; border: 1px solid var(--line); border-radius: 18px; background: var(--solid); font-size: 11px; color: var(--secondary); min-height: 34px; }
.sound-chip[aria-pressed="true"] { background: var(--pink-soft); border-color: var(--pink); color: var(--pink); }
.volume-control { display: flex; gap: 9px; align-items: center; min-width: 190px; }
#trial-volume { width: 112px; height: 26px; min-width: 50px; accent-color: var(--green); cursor: pointer; }
#volume-value { font-size: 11px; font-variant-numeric: tabular-nums; min-width: 29px; color: var(--secondary); }
.touch-audition { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 8px; }
.audition-pad { min-height: 41px; border: 1px solid var(--line); border-radius: 11px; background: var(--green-soft); color: var(--green); font-size: 12px; font-weight: 600; }
.audition-pad:last-child { color: var(--pink); background: var(--pink-soft); }
.audition-pad:active,.role-card:active { transform: translateY(1px); }
.studio-status { display: flex; justify-content: space-between; gap: 14px; align-items: center; padding-top: 10px; font-size: 10px; color: var(--muted); }
#audio-status { overflow-wrap: anywhere; }
.status-end { display: flex; align-items: center; gap: 14px; white-space: nowrap; }
.status-end strong { color: var(--green); font-variant-numeric: tabular-nums; }
.role-grid { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 10px; margin-top: 14px; }
.role-card { display: flex; flex-direction: column; text-align: left; gap: 4px; background: var(--surface); border: 1px solid var(--line); border-radius: 16px; padding: 13px 15px; transition: background-color .15s,border-color .15s; }
.role-card[aria-pressed="true"] { border-color: var(--green); background: var(--green-soft); }
.role-card > strong { font-size: 15px; }
.role-card > span:not(.role-id) { font-size: 10px; color: var(--secondary); }
.role-id { display: flex; justify-content: space-between; color: var(--muted); font-size: 9px; letter-spacing: 1px; }
.role-default { color: var(--green); letter-spacing: 0; }
.role-card .role-action { color: var(--green); font-size: 10px; margin-top: 3px; }
.trial-note { margin: 12px auto 0; text-align: center; font-size: 10px; color: var(--muted); max-width: 750px; }
.section-space { margin-top: 88px; }
.section-heading { text-align: center; margin: 0 auto 30px; max-width: 640px; }
.section-heading h2,.privacy-heading h2,.release-card h2 { font-size: clamp(25px,3vw,34px); line-height: 1.3; letter-spacing: -.8px; margin-bottom: 13px; }
.section-heading > p:last-child,.privacy-heading > p:not(.section-kicker),.release-card > p:not(.eyebrow) { color: var(--secondary); font-size: 14px; line-height: 1.8; }
.feature-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 26px; margin-top: 30px; }
.feature-grid article { padding: 10px 12px; }
.feature-number { font-size: 10px; font-weight: 650; color: var(--green); letter-spacing: 2px; }
.feature-grid h3 { margin: 10px 0 9px; font-size: 17px; }
.feature-grid p { font-size: 12px; color: var(--secondary); line-height: 1.85; }
.privacy-section { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; padding: 36px 40px; background: var(--green-soft); border: 1px solid var(--line); border-radius: 24px; }
.privacy-heading { max-width: 450px; }
.privacy-points { display: grid; gap: 20px; }
.privacy-points h3 { font-size: 14px; margin-bottom: 4px; }
.privacy-points p { font-size: 12px; color: var(--secondary); }
.text-link { display: inline-block; color: var(--green); font-size: 12px; font-weight: 600; border-bottom: 1px solid var(--green); padding-bottom: 2px; margin-top: 14px; }
.faq-section { max-width: 790px; }
.faq-list { border-top: 1px solid var(--line); }
.faq-list details { border-bottom: 1px solid var(--line); padding: 18px 0; }
.faq-list summary { cursor: pointer; font-size: 14px; font-weight: 600; padding-right: 12px; line-height: 1.7; }
.faq-list details > p { margin-top: 12px; color: var(--secondary); font-size: 12px; line-height: 1.9; }
.release-card { text-align: center; background: var(--surface); border: 1px solid var(--line); border-radius: 26px; padding: 42px 28px; }
.release-card h2 { margin-top: 18px; }
.release-card > p:not(.eyebrow) { max-width: 560px; margin-inline: auto; }
.site-footer { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding-block: 36px; margin-top: 50px; border-top: 1px solid var(--line); font-size: 11px; color: var(--secondary); }
.footer-brand { display: flex; align-items: center; gap: 8px; font-weight: 650; font-size: 14px; color: var(--ink); }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 20px; }
.legal-main { max-width: 780px; padding-top: 50px; }
.legal-main h1 { font-size: 36px; line-height: 1.25; margin: 16px 0; }
.legal-intro { font-size: 15px; color: var(--secondary); line-height: 1.8; }
.legal-section { margin-top: 34px; padding-top: 24px; border-top: 1px solid var(--line); }
.legal-section h2 { font-size: 21px; margin-bottom: 12px; }
.legal-section p,.legal-section li { font-size: 14px; color: var(--secondary); line-height: 1.9; }
.legal-section p + p { margin-top: 12px; }
.legal-section ol,.legal-section ul { padding-left: 23px; }
.legal-section li + li { margin-top: 10px; }
.legal-section a { color: var(--green); text-decoration: underline; text-underline-offset: 3px; }
@media (min-width: 961px) {
  html[lang="zh-CN"] .hero h1 { display: flex; justify-content: center; gap: .15em; }
  .hero { padding-top: 26px; }
}
@media (max-width: 960px) {
  .header-nav { gap: 16px; }
  .brand { font-size: 18px; }
  .brand small { max-width: 150px; }
  .companion-bubble { max-width: 150px; }
  .privacy-section { gap: 30px; padding: 28px; }
}
@media (max-width: 760px) {
  .shell { width: calc(100% - 32px); }
  .site-header { min-height: 76px; gap: 10px; }
  .header-nav,.header-release { display: none; }
  .brand { gap: 9px; font-size: 18px; }
  .brand img { width: 35px; height: 35px; }
  .brand small { font-size: 9px; }
  .header-actions { gap: 5px; }
  .quiet-button { min-width: 36px; padding-inline: 9px; font-size: 11px; }
  .hero { padding: 25px 0 22px; }
  .hero h1 { letter-spacing: -1px; margin-top: 16px; }
  .hero-description { font-size: 13px; max-width: 440px; }
  .button { font-size: 12px; padding: 10px 18px; }
  .compatibility { font-size: 9px; max-width: 350px; margin-inline: auto; }
  .studio-card { padding: 16px 14px 12px; border-radius: 20px; }
  .studio-heading { grid-template-columns: minmax(0,1fr) 42px; gap: 10px; }
  .studio-heading h2 { font-size: 15px; }
  .companion-bubble { display: none; }
  .companion-button,.companion img { width: 42px; height: 42px; }
  .visual-toolbar { align-items: flex-start; flex-direction: column; gap: 7px; padding: 10px 10px 0; }
  .visual-label { font-size: 10px; }
  .segmented { align-self: flex-end; }
  .segmented button { min-height: 30px; padding: 3px 10px; }
  #refined-canvas { height: 90px; }
  .trial-actions { font-size: 11px; gap: 6px; }
  .trial-actions > div { gap: 10px; }
  #trial-input { height: 92px; font-size: 16px; padding: 12px; }
  .trial-controls { grid-template-columns: minmax(0,1fr); gap: 9px; }
  .space-options { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); }
  .sound-chip { padding: 7px 5px; font-size: 10px; min-height: 40px; line-height: 1.4; }
  .volume-control { justify-content: flex-end; gap: 10px; min-width: 0; }
  #trial-volume { width: min(160px,55%); flex: 1; }
  .touch-audition { gap: 6px; }
  .audition-pad { min-height: 45px; font-size: 10px; padding: 7px 5px; line-height: 1.5; }
  .studio-status { align-items: flex-start; flex-direction: column; gap: 2px; }
  .status-end { align-self: flex-end; }
  .role-grid { grid-template-columns: repeat(2,minmax(0,1fr)); gap: 8px; }
  .role-card { padding: 12px; }
  .role-card > strong { font-size: 14px; }
  .role-card > span:not(.role-id) { font-size: 10px; }
  .trial-note { font-size: 9px; line-height: 1.8; }
  .section-space { margin-top: 58px; }
  .section-heading { margin-bottom: 23px; }
  .section-heading > p:last-child { font-size: 12px; }
  .feature-grid { grid-template-columns: minmax(0,1fr); gap: 8px; margin-top: 20px; }
  .feature-grid article { padding: 14px 4px; border-bottom: 1px solid var(--line); }
  .feature-grid h3 { margin-top: 5px; font-size: 16px; }
  .privacy-section { grid-template-columns: minmax(0,1fr); gap: 25px; padding: 23px 20px; }
  .privacy-heading h2 { max-width: 16em; }
  .faq-list summary { font-size: 13px; }
  .release-card { padding: 30px 19px; }
  .release-card > p:not(.eyebrow) { font-size: 12px; }
  .site-footer { flex-wrap: wrap; justify-content: center; text-align: center; gap: 17px; margin-top: 35px; }
  .site-footer nav { justify-content: center; gap: 16px; width: 100%; }
  .legal-main { padding-top: 30px; }
  .legal-main h1 { font-size: 29px; }
  .legal-section h2 { font-size: 19px; }
}
@media (max-width: 360px) {
  .brand-cn { display: none; }
  .brand small { font-size: 8px; max-width: 125px; }
  .hero h1 { font-size: 29px; }
  .hero-actions { gap: 8px; }
  .button { padding-inline: 15px; }
  .studio-heading h2 { font-size: 14px; }
  .trial-actions { flex-wrap: wrap; }
  .trial-actions > div { margin-left: auto; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,*::before,*::after { animation: none !important; transition: none !important; }
}