:root {
  color-scheme: light;
  font-family: "Microsoft YaHei UI", "PingFang SC", "Noto Sans CJK SC", sans-serif;
  --paper: #f7faf8;
  --ink: #112e31;
  --muted: #4f6668;
  --teal: #0d776d;
  --teal-dark: #085e56;
  --line: #d8e7e2;
  --soft: #eaf4ef;
  --display: "Microsoft YaHei UI", "PingFang SC", "Noto Sans CJK SC", sans-serif;
  background: var(--paper);
  color: var(--ink);
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; min-width: 280px; }
body:has(dialog[open]) { overflow: hidden; }
button, a, input { -webkit-tap-highlight-color: transparent; }
button, input { font: inherit; }
button { color: inherit; cursor: pointer; }
button:disabled { cursor: not-allowed; }
a { color: inherit; text-decoration: none; }
img, video { max-width: 100%; }
svg { vertical-align: middle; width: 1em; height: 1em; stroke: currentColor; stroke-width: 1.7; }
.symbols { display: none; }
h1, h2, h3, p { margin: 0; }
h1, h2, h3 { font-family: var(--display); }
em { font-style: normal; }
:focus-visible { outline: 3px solid #008b7b; outline-offset: 4px; }
[hidden] { display: none !important; }
[id] { scroll-margin-top: 90px; }
.shell { width: min(1216px, calc(100% - 80px)); margin-inline: auto; }
.section { padding-block: 104px; }
.skip-link { position: fixed; z-index: 10; top: 8px; left: 8px; padding: 11px 16px; border-radius: 8px; color: white; background: var(--ink); transform: translateY(-160%); }
.skip-link:focus { transform: none; }

.site-header { position: relative; z-index: 3; background: rgba(247, 250, 248, .94); border-bottom: 1px solid #e5ece8; }
.site-header-inner { min-height: 73px; display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 10px; justify-self: start; font-size: 18px; font-weight: 750; letter-spacing: -.04em; white-space: nowrap; }
.brand img { flex: none; display: block; border-radius: 11px; }
.site-header nav, .nav-actions { display: flex; align-items: center; gap: 24px; font-size: 14px; white-space: nowrap; }
.site-header nav { color: #435c5e; }
.site-header nav a:hover, .text-button:hover, .back-top:hover { color: var(--teal); }
.nav-actions { justify-content: flex-end; gap: 15px; }
.text-button { background: none; border: 0; padding: 8px 4px; font-weight: 700; }
.button { min-height: 49px; display: inline-flex; align-items: center; justify-content: center; gap: 9px; border: 1px solid transparent; border-radius: 10px; padding: 11px 18px; text-align: center; font-size: 14px; font-weight: 740; line-height: 1.2; transition: background-color .18s ease, border-color .18s ease, color .18s ease, box-shadow .18s ease; }
.button svg { width: 17px; height: 17px; }
.button-dark { background: var(--ink); color: white; }
.button-dark:hover { background: #224b4e; }
.button-teal { background: var(--teal); color: white; box-shadow: 0 5px 12px #096a5e24; }
.button-teal:hover { background: var(--teal-dark); box-shadow: 0 6px 14px #096a5e33; }
.button-outline { background: rgba(255, 255, 255, .75); border-color: #ccdcd6; }
.button-outline:hover { border-color: #88b2a7; background: #edf7f3; }
.nav-download { min-height: 39px; padding: 8px 12px; font-size: 13px; }

.hero { overflow: hidden; background: radial-gradient(ellipse at 84% 49%, #d8eee5 0, transparent 56%), linear-gradient(115deg, #fafbf8 8%, #edf5f1 100%); border-bottom: 1px solid #dcebe4; }
.hero-layout { min-height: 650px; padding-block: 85px 89px; display: grid; grid-template-columns: minmax(0, .87fr) minmax(0, 1.13fr); align-items: center; gap: clamp(38px, 5vw, 72px); }
.eyebrow { display: flex; align-items: center; gap: 9px; color: var(--teal); font-size: 13px; font-weight: 780; letter-spacing: .15em; }
.signal { width: 8px; height: 8px; border-radius: 50%; background: #14877b; box-shadow: 0 0 0 5px #1384751d; margin-inline: 4px 3px; }
.hero h1 { font-size: clamp(49px, 5.5vw, 81px); font-weight: 850; line-height: 1.12; letter-spacing: -.082em; margin: 21px 0; }
.hero h1 em { color: var(--teal); }
.hero-description { max-width: 435px; color: var(--muted); font-size: clamp(16px, 1.6vw, 19px); line-height: 1.8; }
.hero-actions { margin-top: 29px; display: flex; gap: 12px; flex-wrap: wrap; }
.hero-availability { display: flex; align-items: center; flex-wrap: wrap; gap: 9px 19px; margin-top: 22px; color: #4d6866; font-size: 12px; }
.hero-availability span:first-child { display: inline-flex; align-items: center; gap: 5px; font-weight: 740; }
.hero-availability span + span { padding-left: 15px; border-left: 1px solid #b6cdc5; }
.hero-art { position: relative; isolation: isolate; display: flex; align-items: center; justify-content: center; width: 100%; min-width: 0; aspect-ratio: 1.32; overflow: hidden; border: 1px solid #2b6262; border-radius: 24px; padding: 7% 5.4% 10%; text-align: left; background: radial-gradient(ellipse at 75% 5%, #3b8a83 0, #1a5557 43%, #0b2e37 100%); box-shadow: 0 30px 60px #164b4427, 0 4px 9px #163f3c20; color: #d9f5ed; transition: box-shadow .2s ease, border-color .2s ease; }
.hero-art:hover { border-color: #56ae9f; box-shadow: 0 32px 70px #164b4440, 0 4px 10px #163f3c22; }
.hero-art:before, .hero-art:after, .art-glow { position: absolute; content: ""; pointer-events: none; z-index: -1; }
.hero-art:before { inset: 0; background-image: linear-gradient(#effff612 1px, transparent 1px), linear-gradient(90deg, #effff612 1px, transparent 1px); background-size: 31px 31px; mask-image: radial-gradient(ellipse at 67% 55%, #000, transparent 90%); }
.hero-art:after { width: 72%; aspect-ratio: 1; border: 1px solid #a2f2e040; border-radius: 50%; right: -33%; top: -25%; box-shadow: 0 0 0 29px #b2ffed0d, 0 0 0 60px #b2ffed0c; }
.art-glow { inset: 52% 5% -44%; background: radial-gradient(ellipse, #21b7a048 0, transparent 65%); }
.studio-frame { display: grid; width: 100%; border: 1px solid #a2d4c18c; overflow: hidden; border-radius: 12px; background: #f1f8f5; box-shadow: 0 28px 55px #031d219e; transform: rotate(-2deg); }
.studio-chrome { height: 39px; padding: 0 4%; display: flex; align-items: center; justify-content: space-between; gap: 8px; border-bottom: 1px solid #dce8e2; background: #fff; color: #284b47; font-size: clamp(8px, 1.05vw, 12px); font-weight: 720; white-space: nowrap; }
.studio-dots { display: inline-flex; gap: 5px; }
.studio-dots i { width: 7px; height: 7px; display: block; border-radius: 50%; background: #b6cfc6; }
.studio-dots i:first-child { background: #1b9a83; }
.record-chip { display: inline-flex; align-items: center; gap: 4px; padding: 4px 7px; border-radius: 6px; background: #fcefed; color: #a1423a; }
.record-chip i { width: 6px; height: 6px; border-radius: 50%; background: #c8544b; }
.studio-content { display: grid; grid-template-columns: 9% 64% 27%; min-height: 140px; aspect-ratio: 2.55; }
.studio-tools { display: grid; align-content: start; gap: 10px; justify-items: center; padding-block: 15px; background: #e1efea; }
.studio-tools i { width: min(31%, 14px); aspect-ratio: 1; border: 1px solid #74a59a; border-radius: 3px; }
.studio-tools i:nth-child(2) { border-color: #167e6d; background: #a3d3c3; }
.studio-board { position: relative; display: flex; flex-direction: column; justify-content: center; gap: 10%; padding-inline: 10%; overflow: hidden; background: #fbfdfa; color: #15443e; }
.board-kicker { font-size: clamp(7px, 1.05vw, 12px); color: #49867c; font-weight: 730; }
.studio-board strong { z-index: 1; font-size: clamp(12px, 2.3vw, 30px); letter-spacing: -.06em; white-space: nowrap; }
.board-diagram { display: flex; align-items: center; gap: 6px; white-space: nowrap; }
.board-diagram span { border: 1px solid #94cbb9; border-radius: 5px; padding: 5% 8%; color: #217364; font-size: clamp(7px, .86vw, 11px); font-weight: 720; }
.board-diagram i { width: 8%; height: 1px; background: #7eb9a9; }
.board-annotation { position: absolute; width: 57%; height: 29%; left: 5%; bottom: 10%; border: 2px solid #ed8d72; border-radius: 50%; transform: rotate(-8deg); }
.board-pointer { position: absolute; bottom: 11%; right: 8%; width: 26px; height: 26px; display: grid; place-items: center; border-radius: 50%; background: #dff2eb; color: #067666; font-size: 20px; line-height: 1; }
.studio-transcript { display: flex; flex-direction: column; align-items: flex-start; justify-content: center; gap: 8%; padding: 12%; border-left: 1px solid #e3ede8; background: #f4f8f6; color: #2b5550; }
.studio-transcript small { white-space: nowrap; font-size: clamp(7px, .97vw, 12px); font-weight: 780; }
.studio-transcript i { height: 5px; width: 100%; border-radius: 4px; background: #bfd8ce; }
.studio-transcript i:nth-child(3) { width: 75%; }
.studio-transcript i:nth-child(4) { width: 89%; background: #edb8a8; }
.studio-transcript i:nth-child(5) { width: 63%; }
.studio-transcript b { white-space: nowrap; padding: 3px 5px; border-radius: 4px; font-size: clamp(7px, .8vw, 9px); background: #dceee7; }
.studio-timeline { position: relative; display: grid; grid-template-columns: 1.18fr .63fr 1.33fr .76fr; gap: 4px; padding: 5% 6% 4%; border-top: 1px solid #e0ebe5; }
.studio-timeline i { height: clamp(12px, 2vw, 24px); border-radius: 4px; background: repeating-linear-gradient(91deg, #5da99b 0 4px, #7ec2b4 4px 8px); }
.studio-timeline i:nth-child(2) { background: #e3b4a6; }
.studio-timeline i:nth-child(3) { background: #a5c9d7; }
.studio-timeline b { position: absolute; left: 42%; top: 12%; bottom: 12%; width: 2px; background: #bc6651; }
.art-caption { position: absolute; inset: auto 5.5% 4.5%; display: flex; align-items: center; justify-content: space-between; gap: 9px; font-size: 12px; font-weight: 750; }
.art-caption span { display: inline-flex; align-items: center; gap: 8px; }
.art-caption i { width: 7px; height: 7px; border-radius: 50%; background: #80dac7; box-shadow: 0 0 0 4px #80dac720; }
.art-caption svg { width: 13px; height: 13px; }

.section-heading { display: flex; justify-content: space-between; align-items: end; gap: 27px; margin-bottom: 33px; }
.section-heading h2, .help h2, .workflow h2 { font-size: clamp(33px, 3.75vw, 55px); line-height: 1.17; letter-spacing: -.072em; margin-top: 12px; }
.section-heading > p, .workflow-layout > div > p:last-child { max-width: 350px; color: var(--muted); font-size: 15px; line-height: 1.8; }
.feature-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.feature-card { position: relative; display: grid; grid-template-columns: minmax(0, 1.18fr) minmax(0, .82fr); min-height: 235px; overflow: hidden; background: white; border: 1px solid var(--line); border-radius: 17px; }
.feature-copy { position: relative; z-index: 1; padding: 24px 0 23px 23px; }
.feature-icon { display: inline-grid; place-items: center; width: 38px; height: 38px; background: #e8f5f0; border: 1px solid #d4e9e2; border-radius: 9px; color: var(--teal); }
.feature-icon svg { width: 21px; height: 21px; }
.feature-tag { margin-left: 8px; color: #4c6a69; font-size: 10px; white-space: nowrap; font-weight: 720; }
.feature-card h3 { font-size: clamp(22px, 2vw, 29px); letter-spacing: -.052em; margin: 10px 0 6px; }
.feature-card p { color: var(--muted); font-size: 14px; line-height: 1.65; }
.demo-link { display: inline-flex; align-items: center; gap: 5px; margin-top: 11px; padding: 7px 0 4px; border: none; background: transparent; color: var(--teal-dark); font-weight: 750; font-size: 13px; white-space: nowrap; }
.demo-link:hover { text-decoration: underline; text-underline-offset: 4px; }
.feature-art { display: grid; place-items: center; min-width: 0; overflow: hidden; mask-image: linear-gradient(to right, transparent, black 20%); }
.art-record { background: radial-gradient(ellipse at 70% 42%, #c6e5dd 12%, #f4faf7 72%); }
.art-annotation { background: radial-gradient(ellipse at 70% 42%, #f9ded1 12%, #fdf8f3 75%); }
.art-speech { background: radial-gradient(ellipse at 70% 42%, #d9e6f6 10%, #f7fafb 75%); }
.art-rough { background: radial-gradient(ellipse at 70% 42%, #dadcf1 10%, #f7f7fc 75%); }
.feature-art > div { width: 77%; padding: 13%; transform: rotate(-8deg); box-shadow: 0 12px 28px #1a534b17; }
.record-window { position: relative; border: 1px solid #588d85; border-radius: 9px; background: #254f4b; }
.record-window i, .annotation-sheet i { display: block; height: 5px; width: 100%; border-radius: 10px; margin-bottom: 7px; background: #8abaad; }
.record-window i:nth-child(2), .annotation-sheet i:nth-child(2) { width: 65%; }
.record-window i:nth-child(3), .annotation-sheet i:nth-child(3) { width: 78%; }
.record-window b { display: block; position: absolute; inset: 11% 10%; border: 1px dashed #8bf2d6; border-radius: 6px; }
.record-window span { display: block; color: #c9f2e6; font-size: clamp(6px, .9vw, 10px); white-space: nowrap; padding-top: 5px; }
.annotation-sheet { position: relative; border: 1px solid #e7ccbe; border-radius: 9px; background: #fffdf9; }
.annotation-sheet i { background: #d0ad9c; }
.annotation-sheet b { position: absolute; width: 64%; height: 42%; border: 2px solid #d77e6e; border-radius: 50%; top: 18%; left: 17%; transform: rotate(-13deg); }
.annotation-sheet span { display: block; text-align: right; color: #a04f43; line-height: 1; font-weight: 800; }
.feature-art .speech-lines { padding: 9% 6%; background: white; border: 1px solid #c8daef; border-radius: 9px; color: #355172; }
.speech-lines span, .speech-lines del { display: block; border-radius: 4px; padding: 4px; font-size: clamp(6px, .8vw, 10px); font-weight: 740; white-space: nowrap; }
.speech-lines del { margin: 3px 0; color: #8c5355; background: #f9e8e9; }
.wave-demo { background: #fdfdff; border: 1px solid #d5d9ed; border-radius: 9px; }
.wave-demo > div { display: flex; gap: 3px; align-items: center; margin-bottom: 9px; }
.wave-demo i { width: 44%; height: 18px; background: repeating-linear-gradient(90deg, #726fac 0 2px, #c2c4e5 2px 4px); border-radius: 3px; }
.wave-demo b { width: 23%; border-top: 1px dashed #af9bb0; }
.wave-demo small { white-space: nowrap; color: #4b497e; font-size: clamp(7px, .75vw, 10px); }

.workflow { position: relative; overflow: hidden; padding-block: 69px; background: #113b3e; color: #eaf8f3; }
.workflow:before { content: ""; position: absolute; width: 480px; height: 480px; inset: -240px auto auto -200px; border-radius: 50%; border: 1px solid #a0d7c02b; box-shadow: 0 0 0 46px #a0d7c013, 0 0 0 98px #a0d7c00a; pointer-events: none; }
.workflow-layout { position: relative; display: grid; grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr); gap: 48px; align-items: center; }
.workflow .eyebrow { color: #91dbca; }
.workflow h2 { margin-bottom: 15px; }
.workflow-layout > div > p:last-child, .workflow-steps p { color: #bdd9d2; }
.workflow-steps { display: grid; gap: 0; margin: 0; padding: 0; list-style: none; }
.workflow-steps li { display: grid; grid-template-columns: 50px 1fr; gap: 19px; align-items: start; padding: 18px 0; border-bottom: 1px solid #466b6b; }
.workflow-steps li:first-child { border-top: 1px solid #466b6b; }
.workflow-steps li > span { font-family: Consolas, monospace; color: #a5e6d8; letter-spacing: .1em; font-size: 16px; padding-top: 3px; }
.workflow-steps strong { font-size: 19px; }
.workflow-steps p { margin-top: 5px; font-size: 14px; line-height: 1.65; }

.pricing { max-width: 960px; padding-bottom: 65px; }
.plan-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.plan { background: white; padding: 25px; border: 1px solid var(--line); border-radius: 15px; }
.plan-featured { background: #e5f4ee; border-color: #a3cfc3; }
.plan-label { color: var(--teal-dark); font-size: 13px; font-weight: 750; }
.plan h3 { font-size: 47px; letter-spacing: -.08em; margin: 4px 0 7px; line-height: 1.2; }
.plan p:not(.plan-label) { color: var(--muted); font-size: 14px; line-height: 1.65; margin-bottom: 16px; }
.plan button { width: 100%; }
.checkout-note { display: flex; align-items: center; justify-content: center; gap: 5px; color: #4c6966; font-size: 12px; margin-top: 16px; text-align: center; }
.checkout-note svg { color: var(--teal); }
.checkout-h5-link { display: block; width: fit-content; margin: 8px auto 0; color: var(--teal); font-size: 13px; text-decoration: underline; text-underline-offset: .2em; }

.download { display: grid; grid-template-columns: auto minmax(0, 1fr) auto; gap: 18px; align-items: center; padding: 28px; border: 1px solid #c8e2d8; border-radius: 16px; background: #eaf5ef; }
.download-icon { display: grid; place-items: center; width: 52px; height: 52px; border-radius: 12px; color: var(--teal); background: white; font-size: 24px; }
.download h2 { font-size: clamp(20px, 2.2vw, 30px); letter-spacing: -.04em; margin-bottom: 5px; }
.download p { color: var(--muted); font-size: 14px; line-height: 1.55; }
.download-actions { display: flex; align-items: center; gap: 9px; flex-wrap: wrap; }
.help { display: grid; grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr); gap: 50px; align-items: start; }
.help h2 { font-size: clamp(27px, 3.25vw, 42px); }
.faq details { border-bottom: 1px solid var(--line); padding-block: 13px; }
.faq details:first-child { border-top: 1px solid var(--line); }
.faq summary { cursor: pointer; padding-block: 3px; font-size: 15px; font-weight: 760; }
.faq summary::marker { color: var(--teal); }
.faq p { color: var(--muted); line-height: 1.75; font-size: 14px; padding: 9px 8px 2px 16px; }
.site-footer { background: #eef4f0; border-top: 1px solid #dfe9e3; }
.footer-inner { min-height: 90px; display: flex; align-items: center; gap: 20px; }
.site-footer .brand { font-size: 16px; }
.footer-inner p { color: #506e67; font-size: 12px; }
.back-top { margin-left: auto; font-size: 13px; white-space: nowrap; }

.site-dialog { color: var(--ink); border: 1px solid #cfe5dc; border-radius: 17px; background: var(--paper); width: min(720px, calc(100vw - 28px)); max-height: calc(100vh - 24px); padding: 0; box-shadow: 0 26px 70px #0a343e66; }
#account-dialog { width: min(530px, calc(100vw - 28px)); }
.site-dialog::backdrop { background: #082a32aa; backdrop-filter: blur(3px); }
.dialog-inner { position: relative; padding: 26px; }
.dialog-inner h2 { font-size: clamp(25px, 4vw, 36px); letter-spacing: -.055em; margin: 6px 36px 8px 0; }
.dialog-inner > p:not(.eyebrow) { font-size: 14px; line-height: 1.65; color: var(--muted); margin-bottom: 15px; }
.dialog-close { position: absolute; display: grid; place-items: center; width: 36px; height: 36px; top: 14px; right: 14px; border-radius: 8px; border: 1px solid #cfe0d8; background: white; font-size: 19px; }
.dialog-close:hover { background: #eaf5ef; }
.site-dialog video { display: block; width: 100%; max-height: min(56vh, 490px); background: #102f36; border-radius: 11px; }
.demo-fallback { padding: 17px; background: #e7f3ed; border: 1px solid var(--line); border-radius: 10px; }
.dialog-actions { display: flex; gap: 9px; flex-wrap: wrap; margin-top: 16px; }

@media (max-width: 1030px) {
  .shell { width: calc(100% - 56px); }
  .hero-layout { min-height: 580px; gap: 28px; }
  .site-header nav { gap: 15px; }
  .feature-card { grid-template-columns: 1.36fr .64fr; }
  .download { grid-template-columns: auto minmax(0, 1fr); }
  .download-actions { grid-column: 2; }
}
@media (max-width: 760px) {
  .shell { width: calc(100% - 34px); }
  .section { padding-block: 61px; }
  .site-header-inner { min-height: 61px; grid-template-columns: 1fr auto; gap: 10px; }
  .site-header nav { display: none; }
  .brand { font-size: 16px; gap: 7px; }
  .brand img { width: 33px; height: 33px; }
  .nav-actions { gap: 8px; }
  .nav-download { min-height: 35px; padding: 7px 8px; font-size: 11px; }
  .nav-download svg { width: 14px; height: 14px; }
  .text-button { font-size: 13px; }
  .hero-layout { min-height: 0; padding-block: 43px 48px; grid-template-columns: 1fr; gap: 26px; }
  .hero h1 { font-size: clamp(42px, 8.8vw, 65px); margin: 14px 0 16px; }
  .hero-description { max-width: 480px; }
  .hero-actions { margin-top: 21px; }
  .hero-availability { margin-top: 16px; font-size: 11px; }
  .hero-art { border-radius: 17px; padding-bottom: 11%; }
  .studio-content { min-height: 113px; }
  .studio-board strong { font-size: clamp(12px, 3.6vw, 25px); }
  .studio-tools { gap: 7px; }
  .feature-grid, .workflow-layout, .help { grid-template-columns: 1fr; }
  .section-heading { align-items: start; flex-direction: column; gap: 12px; margin-bottom: 20px; }
  .section-heading h2, .workflow h2 { font-size: clamp(29px, 6vw, 44px); }
  .feature-grid { gap: 12px; }
  .feature-card { min-height: 200px; grid-template-columns: 1.2fr .8fr; }
  .feature-copy { padding: 16px 0 15px 15px; }
  .feature-icon { width: 32px; height: 32px; }
  .feature-icon svg { width: 17px; height: 17px; }
  .workflow { padding-block: 43px; }
  .workflow-layout, .help { gap: 23px; }
  .workflow-steps li { grid-template-columns: 34px 1fr; gap: 9px; padding-block: 13px; }
  .plan { padding: 16px; }
  .plan h3 { font-size: 35px; }
  .plan p:not(.plan-label) { min-height: 44px; }
  .download { padding: 16px; gap: 11px; }
  .download-icon { width: 40px; height: 40px; font-size: 19px; }
  .download-actions { grid-column: 1 / -1; }
  .footer-inner { min-height: 73px; gap: 10px; }
  .footer-inner p { display: none; }
}
@media (max-width: 365px) {
  .shell { width: calc(100% - 26px); }
  .hero h1 { font-size: 40px; }
  .nav-download svg { display: none; }
  .nav-actions { gap: 6px; }
  .hero-actions { gap: 7px; }
  .button { padding-inline: 11px; }
  .feature-tag { margin-left: 4px; }
  .plan-grid { grid-template-columns: 1fr; }
  .plan p:not(.plan-label) { min-height: 0; }
  .dialog-inner { padding: 19px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; }
}