:root {
  color-scheme: light;
  --white: #fff;
  --ink: #171719;
  --muted: #85858b;
  --red: #e82734;
  --line: #e7e7e9;
  --soft: #f7f7f8;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 90px; -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body { margin: 0; background: var(--white); color: var(--ink); font-family: var(--font); -webkit-font-smoothing: antialiased; }
body, h1, h2, p { margin: 0; }
a { color: inherit; text-decoration: none; }
button, a { -webkit-tap-highlight-color: transparent; }
button { font: inherit; }
button, a[href] { cursor: pointer; }
button { color: inherit; }
button:disabled, [aria-disabled="true"] { cursor: not-allowed; }
[hidden] { display: none !important; }
img { display: block; max-width: 100%; }
svg { fill: none; stroke: currentColor; stroke-width: 1.65; stroke-linecap: round; stroke-linejoin: round; }
.icon { width: 22px; height: 22px; flex: none; }
.svg-defs { position: absolute; width: 0; height: 0; overflow: hidden; }
:focus-visible { outline: 3px solid #ee737c; outline-offset: 6px; }
.skip-link { position: fixed; z-index: 100; top: 12px; left: 20px; padding: 12px 18px; background: var(--ink); color: white; transform: translateY(-150%); border-radius: 8px; }
.skip-link:focus { transform: translateY(0); }
.site-header { height: 76px; position: relative; z-index: 10; background: white; }
.header-inner { max-width: 1216px; padding: 0 28px; height: 100%; margin: auto; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 9px; flex: none; min-height: 44px; }
.brand img { width: 42px; height: 42px; object-fit: contain; }
.brand span { font-size: 23px; font-weight: 650; letter-spacing: -.8px; }
.header-nav { display: flex; gap: 34px; align-items: center; font-size: 13px; font-weight: 500; }
.header-nav > a:not(.header-download) { display: inline-flex; align-items: center; min-height: 44px; padding: 12px 0; transition: color 180ms; }
.header-nav > a:hover { color: var(--red); }
.header-download { min-height: 44px; display: inline-flex; align-items: center; gap: 8px; padding: 0 17px; color: var(--red); border: 1px solid var(--red); border-radius: 40px; font-size: 12px; white-space: nowrap; }
.header-download .icon { width: 15px; height: 15px; }
.hero { position: relative; overflow: hidden; padding-top: 77px; text-align: center; }
.hero-copy { position: relative; z-index: 2; padding: 0 24px; }
h1 { font-size: clamp(44px, 5.35vw, 80px); font-weight: 700; line-height: 1.23; letter-spacing: -3.8px; }
.hero-subtitle { margin-top: 17px; font-size: 27px; line-height: 1.6; color: #75757d; font-weight: 350; letter-spacing: 3px; }
.hero-actions { margin-top: 28px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 49px; gap: 12px; padding: 0 27px; border: 0; border-radius: 100px; font-size: 16px; font-weight: 500; line-height: 1.4; transition: transform 220ms ease, box-shadow 220ms ease, filter 220ms ease; white-space: nowrap; }
.button-primary { color: white; background: linear-gradient(180deg, #f43645, #df1224); box-shadow: inset 0 1px 0 #ff727b; }
.button-dark { color: white; background: var(--ink); }
.button-large { min-height: 58px; padding: 0 33px; font-size: 20px; gap: 12px; }
.button-large .icon { width: 25px; height: 25px; }
@media (hover: hover) and (pointer: fine) { .button:hover { transform: translateY(-2px); box-shadow: 0 8px 24px #17171912; filter: brightness(1.04); } }
.download-meta { margin-top: 13px; color: var(--muted); font-size: 12px; line-height: 1.8; }
.release-meta:not([hidden])::before { content: " · "; margin: 0 3px; }
.platforms { display: flex; align-items: center; justify-content: center; gap: 18px; margin-top: 21px; color: var(--muted); font-size: 12px; }
.platform { display: inline-flex; align-items: center; gap: 7px; min-height: 44px; }
.platform-icon { width: 14px; height: 15px; stroke-width: 1.4; }
.platform-divider { width: 1px; height: 12px; background: #d4d4d8; }
.platform-ready { color: var(--red); }
.hero-art { max-width: 1360px; margin: -27px auto 0; pointer-events: none; }
.hero-art img { width: 100%; height: auto; }
.hero-art .is-product-image { width: min(calc(100% - 56px), 1040px); margin: 65px auto 60px; height: auto; border-radius: 16px; box-shadow: 0 25px 70px #00000018; }
.section-shell { max-width: 1216px; margin: 0 auto; padding-left: 28px; padding-right: 28px; }
section { scroll-margin-top: 30px; }
h2 { font-size: 66px; font-weight: 650; line-height: 1.35; letter-spacing: -2px; }
.section-label { color: var(--muted); font-size: 16px; margin-bottom: 23px; letter-spacing: 1px; }
.section-description { color: var(--muted); font-size: 20px; line-height: 1.7; font-weight: 400; margin-top: 24px; }
.library { padding-top: 84px; }
.library-inner { position: relative; display: grid; grid-template-columns: 1fr 1fr; align-items: center; min-height: 665px; gap: 50px; padding-bottom: 65px; border-bottom: 1px solid var(--line); }
.library-copy { position: relative; z-index: 1; min-width: 0; }
.library h2 { font-size: 62px; letter-spacing: -2px; }
.inline-action { display: flex; align-items: center; gap: 22px; flex-wrap: wrap; margin-top: 43px; }
.action-note { color: var(--muted); font-size: 12px; }
.music-type { font-family: Arial, sans-serif; font-size: clamp(170px, 21.7vw, 310px); font-weight: 750; letter-spacing: -14px; line-height: .92; color: transparent; -webkit-text-stroke: 1px #bcbcc1; display: flex; flex-direction: column; user-select: none; }
.music-type span:last-child { letter-spacing: -20px; }
.extraction-row, .wechat-id-row { display: flex; align-items: center; justify-content: flex-start; gap: 16px; margin-top: 20px; font-size: 13px; color: var(--muted); }
.text-button { display: inline-flex; align-items: center; justify-content: center; min-width: 44px; min-height: 44px; gap: 7px; border: 0; background: transparent; color: var(--ink); font-size: 13px; padding: 8px; border-radius: 5px; }
.text-button:hover { color: var(--red); }
.text-button .icon { width: 15px; height: 15px; }
.beauty { text-align: center; }
.beauty-inner { min-height: 720px; display: flex; align-items: center; flex-direction: column; justify-content: center; padding: 92px 0 105px; }
.beauty h2 { font-size: 64px; }
.beauty-type { font-family: Arial, sans-serif; font-size: clamp(130px, 21vw, 290px); line-height: 1.15; letter-spacing: -16px; font-weight: 700; color: #dedee1; margin: 3px 0 33px; user-select: none; }
.beauty .section-description { margin: -12px 0 26px; }
.rvc { background: var(--soft); overflow: hidden; }
.rvc-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 55px; min-height: 730px; align-items: center; padding-top: 120px; padding-bottom: 120px; }
.rvc-copy .section-description { max-width: 465px; font-size: 17px; }
.rvc-copy .button { margin-top: 33px; }
.rvc-copy, .rvc-visual { position: relative; min-width: 0; }
.rvc-type { font-family: Arial, sans-serif; font-size: clamp(100px, 13vw, 188px); line-height: .95; font-weight: 700; letter-spacing: -12px; color: #fff; display: block; user-select: none; }
.rvc-visual p { font-size: 20px; font-weight: 600; margin: 15px 0 0 10px; }
.contact-inner { text-align: center; padding: 130px 0 100px; }
.contact h2 { font-size: 76px; }
.contact .section-description { margin-top: 24px; }
.wechat-contact { margin-top: 66px; display: flex; align-items: center; flex-direction: column; }
.contact-placeholder { display: flex; align-items: center; justify-content: center; height: 64px; width: 100px; }
.wechat-icon { width: 75px; height: 64px; stroke-width: 1.5; }
.wechat-title { margin-top: 23px; font-size: 20px; font-weight: 500; }
.contact-status { margin-top: 14px; color: var(--muted); font-size: 15px; }
.wechat-id-row { justify-content: center; flex-wrap: wrap; }
.wechat-id-row > span { overflow-wrap: anywhere; }
.qr-button { padding: 12px; background: white; border: 1px solid var(--line); border-radius: 12px; transition: transform 200ms; }
@media (hover: hover) and (pointer: fine) { .qr-button:hover { transform: scale(1.03); } }
.qr-button img { width: 196px; height: auto; object-fit: contain; }
.site-footer { display: flex; align-items: center; justify-content: space-between; padding: 28px 0 calc(140px + env(safe-area-inset-bottom)); border-top: 1px solid var(--line); gap: 20px; }
.footer-brand { display: inline-flex; align-items: center; gap: 4px; min-height: 44px; font-size: 20px; font-weight: 650; letter-spacing: -.7px; }
.footer-brand span { color: var(--red); }
.site-footer p { font-size: 12px; color: var(--muted); }
.site-footer { flex-wrap: wrap; }
.footer-icp { flex: 0 0 100%; text-align: center; font-size: 12px; color: var(--muted); text-decoration: underline; }
.dock-wrapper { position: fixed; z-index: 30; bottom: calc(22px + env(safe-area-inset-bottom)); left: 50%; transform: translateX(-50%); width: max-content; max-width: calc(100% - 24px); }
.dock { display: flex; align-items: flex-end; justify-content: center; min-height: 88px; padding: 12px 15px 9px; gap: 9px; background: #ffffffb3; border: 1px solid #e6e6e9b3; border-radius: 25px; box-shadow: 0 5px 30px #1f22300c, inset 0 1px 1px #fff; backdrop-filter: blur(24px) saturate(1.4); -webkit-backdrop-filter: blur(24px) saturate(1.4); }
.dock-item { --dock-size: 48px; --dock-lift: 0px; width: calc(var(--dock-size) + 15px); transition: width 130ms ease-out; }
.dock-link { display: flex; position: relative; flex-direction: column; align-items: center; padding: 0 4px 1px; outline-offset: 4px; border-radius: 15px; }
.dock-tile { height: var(--dock-size); width: var(--dock-size); transform: translateY(var(--dock-lift)); border-radius: 13px; display: flex; align-items: center; justify-content: center; color: #fff; box-shadow: inset 0 1px 1px #ffffff77, 0 3px 6px #00000008; transition: width 130ms ease-out, height 130ms ease-out, transform 130ms ease-out; }
.dock-tile .icon { width: 53%; height: 53%; stroke-width: 1.55; }
.dock-red { background: linear-gradient(155deg, #ff6375, #ed1d35); }
.dock-blue { background: linear-gradient(155deg, #82b5ff, #4872ff); }
.dock-pink { background: linear-gradient(155deg, #ff98c6, #ed489c); }
.dock-purple { background: linear-gradient(155deg, #c08bff, #8750f0); }
.dock-green { background: linear-gradient(155deg, #77e8b9, #28b584); }
.dock-label { margin-top: 7px; font-size: 10px; line-height: 1.4; font-weight: 500; color: #66666e; white-space: nowrap; }
.dock-link.is-active::after { content: ""; position: absolute; width: 3px; height: 3px; border-radius: 50%; background: var(--ink); bottom: -6px; }
.dock-tooltip { position: absolute; bottom: calc(100% + 22px); left: 50%; transform: translate(-50%, 5px); padding: 6px 10px; font-size: 12px; color: #46464c; background: #ffffffef; border: 1px solid #e5e5e8; box-shadow: 0 3px 14px #00000008; border-radius: 8px; white-space: nowrap; opacity: 0; pointer-events: none; transition: opacity 140ms, transform 140ms; }
.dock-item.is-hovered .dock-tooltip, .dock-link:focus-visible .dock-tooltip { opacity: 1; transform: translate(-50%, 0); }
.dock-link:focus-visible .dock-tile { transform: translateY(-7px) scale(1.08); }
.toast { position: fixed; z-index: 80; left: 50%; bottom: calc(140px + env(safe-area-inset-bottom)); transform: translate(-50%, 8px); max-width: calc(100vw - 40px); color: white; background: #222229ed; padding: 13px 20px; font-size: 14px; border-radius: 12px; opacity: 0; pointer-events: none; transition: opacity 180ms, transform 180ms; text-align: center; }
.toast.visible { opacity: 1; transform: translate(-50%, 0); }
.qr-dialog { position: fixed; border: 0; border-radius: 22px; padding: 48px 28px 24px; width: min(420px, calc(100% - 32px)); max-height: calc(100vh - 32px); max-height: calc(100dvh - 32px); overflow: auto; overscroll-behavior: contain; box-shadow: 0 25px 100px #0003; text-align: center; }
.qr-dialog::backdrop { background: #17171966; backdrop-filter: blur(5px); }
.qr-dialog h2 { font-size: 24px; letter-spacing: 0; }
.qr-dialog img { margin: 18px auto; width: min(340px, 100%, calc((100vh - 190px) * .785)); width: min(340px, 100%, calc((100dvh - 190px) * .785)); height: auto; object-fit: contain; }
.qr-dialog p { font-size: 14px; color: var(--muted); }
.dialog-close { position: absolute; right: 8px; top: 8px; width: 44px; height: 44px; border: 0; background: #f3f3f5; border-radius: 50%; display: grid; place-items: center; }
.dialog-close .icon { width: 16px; height: 16px; }
.noscript-note { padding: 24px 24px 130px; text-align: center; font-size: 13px; color: var(--muted); }
.reveal.is-in-view { animation: section-arrive 650ms both; }
@keyframes section-arrive { from { transform: translateY(20px); } to { transform: translateY(0); } }
@media (min-width: 1600px) { .hero { padding-top: 98px; } }
@media (max-width: 1000px) {
  .header-inner, .section-shell { padding-left: 35px; padding-right: 35px; }
  .header-nav { gap: 24px; }
  .hero { padding-top: 73px; }
  h1 { letter-spacing: -2.5px; }
  .hero-subtitle { font-size: 23px; }
  .hero-art { margin-top: 5px; }
  .library-inner { gap: 28px; min-height: 580px; }
  .library h2, h2 { font-size: 48px; }
  .music-type { font-size: 24vw; letter-spacing: -12px; }
  .music-type span:last-child { letter-spacing: -13px; }
  .inline-action { gap: 18px; }
  .beauty-inner { min-height: 640px; }
  .beauty-type { font-size: 23vw; }
  .rvc-inner { min-height: 610px; gap: 25px; }
  .rvc-type { font-size: 13vw; letter-spacing: -9px; }
  .section-description { font-size: 17px; }
  .contact h2 { font-size: 64px; }
}
/* iPad portrait and small tablets retain balanced columns without oversized type. */
@media (min-width: 768px) and (max-width: 1023px) {
  .header-inner, .section-shell { padding-left: 32px; padding-right: 32px; }
  .header-nav { gap: 22px; }
  h1 { font-size: clamp(48px, 6.3vw, 64px); }
  h2, .library h2 { font-size: clamp(40px, 5.5vw, 52px); }
  .hero { padding-top: 78px; }
  .hero-art { margin-top: 15px; }
  .library { padding-top: 72px; }
  .library-inner { min-height: 590px; gap: 30px; }
  .inline-action { align-items: flex-start; flex-direction: column; gap: 15px; margin-top: 31px; }
  .beauty-inner { min-height: 580px; }
  .beauty h2 { font-size: 54px; }
  .beauty-type { letter-spacing: -12px; }
  .rvc-inner { min-height: 620px; gap: 30px; padding-top: 90px; padding-bottom: 90px; }
  .rvc-copy .section-description { font-size: 16px; }
  .rvc-type { font-size: 12.5vw; letter-spacing: -8px; }
  .contact-inner { padding-top: 110px; padding-bottom: 90px; }
}
/* Narrow windows and split-screen iPad use the same content flow as phones. */
@media (max-width: 767.98px) {
  html { scroll-padding-top: 25px; }
  .site-header { height: 66px; }
  .header-inner { padding: 0 max(16px, env(safe-area-inset-right)) 0 max(16px, env(safe-area-inset-left)); gap: 10px; }
  .brand { gap: 4px; }
  .brand img { width: 34px; height: 34px; }
  .brand span { font-size: 19px; letter-spacing: -.5px; }
  .header-nav { gap: 0; }
  .header-nav > a:not(.header-download) { display: none; }
  .header-download { font-size: 11px; gap: 6px; padding: 0 12px; min-height: 44px; }
  .header-download .icon { width: 12px; height: 12px; }
  .hero { padding-top: 66px; }
  .hero-copy { padding: 0 16px; }
  h1 { font-size: clamp(28px, 8.5vw, 50px); letter-spacing: -1.6px; line-height: 1.3; }
  .hero-subtitle { font-size: 17px; letter-spacing: 1.2px; margin-top: 17px; }
  .hero-actions { margin-top: 29px; }
  .button-large { min-height: 53px; padding: 0 26px; font-size: 16px; }
  .button-large .icon { width: 21px; height: 21px; }
  .download-meta { font-size: 11px; margin-top: 14px; }
  .release-meta:not([hidden])::before { margin: 0 1px; }
  .platforms { gap: 14px; font-size: 11px; margin-top: 17px; }
  .platform { gap: 5px; }
  .platform-icon { width: 12px; height: 13px; }
  .hero-art { position: relative; width: 135%; max-width: none; margin: 24px 0 0 -17.5%; }
  .hero-art .is-product-image { width: 70%; margin: 36px auto 46px; border-radius: 9px; }
  .section-shell { padding-left: max(24px, env(safe-area-inset-left)); padding-right: max(24px, env(safe-area-inset-right)); }
  .library { padding-top: 66px; }
  .library-inner { display: block; min-height: 670px; padding-bottom: 50px; }
  .section-label { font-size: 13px; margin-bottom: 20px; }
  h2, .library h2 { font-size: 42px; line-height: 1.45; letter-spacing: -1.6px; }
  .section-description { font-size: 16px; margin-top: 20px; }
  .inline-action { margin-top: 29px; gap: 17px; }
  .button { font-size: 14px; min-height: 47px; padding: 0 23px; gap: 11px; }
  .button-large { font-size: 16px; min-height: 53px; padding: 0 26px; }
  .button .icon { width: 19px; height: 19px; }
  .action-note { font-size: 12px; }
  .music-type { margin-top: 38px; align-items: flex-end; font-size: clamp(110px, 24vw, 170px); letter-spacing: -6px; line-height: .9; }
  .music-type span:last-child { letter-spacing: -7px; }
  .beauty-inner { padding: 82px 0; min-height: 420px; }
  .beauty h2 { font-size: 39px; }
  .beauty-type { font-size: clamp(80px, 25vw, 170px); letter-spacing: -7px; line-height: 1.3; margin: 17px 0 28px; }
  .rvc-inner { min-height: 610px; display: flex; flex-direction: column; align-items: stretch; gap: 60px; padding-top: 75px; padding-bottom: 64px; }
  .rvc-copy .section-description { max-width: 300px; font-size: 14px; line-height: 1.9; }
  .rvc-copy .button { margin-top: 27px; }
  .rvc-visual { align-self: flex-end; }
  .rvc-type { font-size: clamp(76px, 23vw, 130px); letter-spacing: -6px; }
  .rvc-visual p { font-size: 14px; margin: 5px 0 0 3px; }
  .contact-inner { padding: 95px 0 73px; }
  .contact h2 { font-size: 48px; }
  .contact .section-description { font-size: 14px; margin-top: 22px; }
  .wechat-contact { margin-top: 47px; }
  .wechat-icon { width: 65px; height: 54px; }
  .wechat-title { font-size: 17px; margin-top: 17px; }
  .contact-status { font-size: 12px; }
  .footer-brand { font-size: 18px; }
  .site-footer { padding-top: 24px; padding-bottom: calc(125px + env(safe-area-inset-bottom)); }
  .site-footer p { font-size: 11px; }
  .dock-wrapper { bottom: calc(14px + env(safe-area-inset-bottom)); }
  .dock { min-height: 76px; padding: 9px 9px 8px; gap: 2px; border-radius: 22px; }
  .dock-item { width: clamp(48px, 14vw, 55px); }
  .dock-tile { width: 42px; height: 42px; border-radius: 12px; transform: none; }
  .dock-link { padding: 0 3px 1px; }
  .dock-label { font-size: 10px; margin-top: 6px; }
  .dock-tooltip { display: none; }
  .toast { font-size: 12px; bottom: calc(108px + env(safe-area-inset-bottom)); }
}
/* A short landscape viewport needs room for the CTA and a compact bottom dock. */
@media (max-height: 600px) and (orientation: landscape) {
  .site-header { height: 64px; }
  .header-inner, .section-shell { padding-left: max(28px, env(safe-area-inset-left)); padding-right: max(28px, env(safe-area-inset-right)); }
  .hero { padding-top: 30px; }
  h1 { font-size: clamp(32px, 5vw, 56px); }
  .hero-subtitle { margin-top: 10px; font-size: 18px; letter-spacing: 1px; }
  .hero-actions { margin-top: 18px; }
  .button-large { min-height: 48px; font-size: 16px; }
  .download-meta { margin-top: 9px; }
  .platforms { margin-top: 6px; }
  .hero-art { max-width: 900px; margin-top: 0; }
  .dock-wrapper { bottom: calc(8px + env(safe-area-inset-bottom)); }
  .dock { min-height: 69px; padding: 7px 12px 8px; border-radius: 20px; gap: 5px; }
  .dock-item { width: 54px; }
  .dock-tile { width: 40px; height: 40px; border-radius: 11px; transform: none; }
  .dock-label { font-size: 10px; margin-top: 5px; }
  .dock-tooltip { display: none; }
  .qr-dialog { padding-top: 46px; padding-bottom: 18px; }
  .qr-dialog h2 { font-size: 20px; }
  .qr-dialog img { margin-top: 10px; margin-bottom: 10px; width: min(250px, 100%, calc((100vh - 160px) * .785)); width: min(250px, 100%, calc((100dvh - 160px) * .785)); }
  .qr-dialog p { font-size: 12px; }
}
@media (max-height: 380px) and (orientation: landscape) {
  .site-header { height: 60px; }
  .hero { padding-top: 16px; }
  h1 { font-size: 28px; line-height: 1.2; }
  .hero-subtitle { margin-top: 8px; font-size: 16px; line-height: 1.4; }
  .hero-actions { margin-top: 12px; }
  .button-large { min-height: 44px; }
}
@media (max-width: 359px) {
  .header-inner { padding-left: 12px; padding-right: 12px; }
  .brand span { font-size: 18px; }
  .brand img { width: 30px; height: 30px; }
  .header-download { padding: 0 10px; font-size: 10px; }
  .site-footer { flex-wrap: wrap; gap: 12px; }
}
@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  .dock { background: #fffffff5; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .button:hover, .qr-button:hover, .dock-tile, .dock-link:focus-visible .dock-tile { transform: none !important; }
}