:root {
  --paper: #eeece6;
  --ink: #1c2b30;
  --muted: #58636a;
  --line: #1c2b3030;
  --night: #18262b;
  --light: #f2f0e9;
  --accent: #c3b395;
  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 32px; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: var(--font); -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }
a, button { -webkit-tap-highlight-color: transparent; }
a:focus-visible, button:focus-visible, summary:focus-visible { outline: 2px solid #b48d4d; outline-offset: 5px; }
.wrap { width: min(1180px, calc(100% - 112px)); margin-inline: auto; }
.nav { width: 100%; height: 96px; padding-inline: max(56px, calc((100% - 1180px) / 2)); display: flex; align-items: center; justify-content: space-between; gap: 24px; background: var(--night); color: var(--light); border-bottom: 1px solid #ffffff25; }
.brand { display: flex; align-items: center; gap: 12px; font-size: 24px; font-weight: 650; letter-spacing: 2px; white-space: nowrap; }
.brand img { border-radius: 8px; }
.brand small { font-size: 10px; letter-spacing: 2px; margin-left: 6px; font-weight: 500; }
.nav nav { display: flex; gap: 32px; font-size: 13px; color: #d5d9d8; }
.nav-actions { display: flex; align-items: center; gap: 22px; }
.language-switch { font-size: 12px; letter-spacing: 1px; padding: 10px 4px; white-space: nowrap; }
.nav-cta { font-size: 12px; border: 1px solid #ffffff50; padding: 12px 17px; white-space: nowrap; }
.nav-cta span { margin-left: 20px; }
.nav a:hover { color: var(--accent); }
.hero { width: 100%; padding: 52px max(56px, calc((100% - 1180px) / 2)) 52px; display: grid; grid-template-columns: 1.1fr 1fr; align-items: center; gap: 48px; min-height: 720px; background: var(--night); color: var(--light); border-bottom: 4px solid var(--accent); }
.hero-copy { padding-block: 24px; }
.eyebrow { font-size: 11px; letter-spacing: 2px; font-weight: 600; line-height: 1.8; }
.hero .eyebrow { color: var(--accent); }
.dot { display: inline-block; width: 5px; height: 5px; background: var(--accent); margin-right: 10px; vertical-align: middle; }
h1 { font-size: clamp(64px, 6.6vw, 88px); font-weight: 650; letter-spacing: -3px; line-height: 1.18; margin: 29px 0 31px; }
h1 em { font-style: normal; color: var(--accent); }
.hero-description { font-size: 15px; line-height: 2; color: #c7cecf; }
.hero-actions { display: flex; align-items: center; gap: 26px; margin-top: 32px; }
.button { display: inline-flex; align-items: center; justify-content: space-between; gap: 26px; padding: 17px 23px; font-size: 13px; font-weight: 600; border: 1px solid transparent; transition: background .15s; }
.dark { background: var(--light); color: var(--ink); }
.button:hover { background: #d8cbb3; }
.text-link { font-size: 12px; display: inline-flex; gap: 16px; align-items: center; }
.text-link:hover { text-decoration: underline; text-underline-offset: 5px; }
.micro { font-size: 11px; color: #a6b0b4; margin-top: 22px; letter-spacing: .3px; }
.hero-art { min-width: 0; position: relative; min-height: 610px; display: flex; justify-content: center; align-items: center; border-left: 1px solid #ffffff20; padding-left: 26px; }
.art-note { position: absolute; top: 0; left: 26px; right: 0; font-size: 9px; letter-spacing: 2px; color: #a8b3b7; border-top: 1px solid #ffffff20; padding-top: 13px; }
.phone { position: relative; flex-shrink: 0; width: 263px; height: 532px; border: 5px solid #607078; border-radius: 37px; background: #e9ece8; color: #21343d; overflow: hidden; box-shadow: 0 18px 30px #00000024; }
.phone-top { height: 47px; padding: 13px 22px; display: flex; justify-content: space-between; align-items: center; font-size: 9px; font-weight: 600; }
.island { width: 77px; height: 22px; position: absolute; top: 10px; left: calc(50% - 38.5px); border-radius: 20px; background: #27353b; }
.phone-content { height: calc(100% - 64px); padding: 20px; display: flex; flex-direction: column; text-align: center; }
.home-indicator { position: absolute; bottom: 9px; width: 84px; height: 3px; border-radius: 3px; background: #21343d; left: calc(50% - 42px); }
.demo-caption { position: absolute; bottom: 0; left: 26px; right: 0; font-size: 10px; color: #bec7c9; display: flex; align-items: center; gap: 10px; border-bottom: 1px solid #ffffff20; padding-bottom: 13px; }
.small-line { width: 18px; height: 1px; background: var(--accent); flex-shrink: 0; }
.demo-date { font-size: 42px; margin: 16px 0 4px; font-weight: 500; letter-spacing: -1px; }
.demo-day { font-size: 10px; color: #58676c; margin-bottom: 31px; }
.app-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px 10px; }
.app-button { border: 0; background: none; padding: 0; color: #21343d; font-size: 9px; display: flex; flex-direction: column; gap: 7px; align-items: center; }
.app-icon { width: 49px; height: 49px; border-radius: 13px; display: grid; place-items: center; font-size: 14px; background: #fff; }
.douyin { background: #252629; color: white; font-size: 31px; text-shadow: 2px 1px #eb5d7f, -2px -1px #62d6d9; }
.red { background: #e74a5c; color: #fff; font-size: 12px; font-weight: 700; }
.dummy { opacity: .55; }
.app-icon img { width: 49px; height: 49px; border-radius: 13px; }
.phone-hint { margin-top: auto; font-size: 10px; line-height: 1.8; color: #58676c; }
.pause-symbol { font-size: 36px; width: 54px; height: 54px; line-height: 49px; border: 2px solid #647f8c; border-radius: 50%; margin: 40px auto 22px; color: #647f8c; }
.phone-content h3 { font-size: 18px; font-weight: 600; margin: 0 0 9px; }
.phone-subtitle { font-size: 12px; line-height: 1.8; color: #58676c; margin: 0; }
.phone-actions { margin-top: auto; display: grid; gap: 10px; padding-bottom: 16px; }
.phone-actions button, .demo-reset { border: 0; border-radius: 28px; min-height: 43px; background: #283d4a; color: #fff; font-size: 12px; }
.phone-actions .secondary { background: #d4dcd9; color: #283d4a; }
.phone-result { margin: auto 0; }
.result-icon { font-size: 38px; margin-bottom: 20px; }
.phone-result p { font-size: 12px; line-height: 1.9; color: #58676c; }
.demo-reset { margin-top: 22px; padding: 0 28px; }
.result-label { font-size: 9px; letter-spacing: 1px; color: #58676c; margin-top: 22px; }
.manifesto { padding-block: 42px; display: grid; grid-template-columns: 1fr 2.2fr; align-items: start; gap: 40px; border-bottom: 1px solid var(--line); }
.section-index { font-size: 11px; letter-spacing: 1px; color: var(--muted); margin-top: 9px; }
.manifesto p { font-size: 30px; font-weight: 550; line-height: 1.6; margin: 0; letter-spacing: -.5px; }
.manifesto p span { color: #586b72; }
.section { padding-block: 86px; display: grid; grid-template-columns: 1fr 1.2fr; gap: 75px; }
.section-heading h2, .privacy-panel h2, .closing h2 { font-weight: 600; font-size: 38px; line-height: 1.45; letter-spacing: -1px; margin: 18px 0; }
.section-heading > p:last-child, .privacy-panel p:not(.eyebrow) { font-size: 14px; color: var(--muted); line-height: 1.9; }
.steps article { display: flex; gap: 24px; padding: 24px 0; border-bottom: 1px solid var(--line); }
.steps article:first-child { padding-top: 7px; }
.step-number { font-family: monospace; color: #697a80; font-size: 13px; padding-top: 4px; }
.steps h3 { font-size: 17px; font-weight: 600; margin: 0 0 12px; }
.steps article p { font-size: 13px; line-height: 1.9; color: var(--muted); margin: 0; }
.fine { font-size: 11px; color: var(--muted); line-height: 1.8; margin-top: 21px; }
.privacy-panel { background: #dfe2dc; border-top: 2px solid var(--ink); border-bottom: 1px solid var(--line); padding: 44px; display: grid; grid-template-columns: .55fr 1.5fr .8fr; gap: 32px; align-items: center; }
.privacy-symbol { width: 72px; height: 92px; border: 1px solid #718079; border-radius: 0 0 35px 35px; display: grid; place-items: center; }
.privacy-symbol span { width: 26px; height: 33px; border: 1px solid #718079; border-radius: 15px 15px 2px 2px; position: relative; }
.privacy-symbol span:after { content: ""; height: 8px; width: 2px; background: #718079; position: absolute; top: 15px; left: 11px; }
.privacy-panel h2 { font-size: 30px; }
.privacy-panel .text-link { margin-top: 13px; font-weight: 500; }
.privacy-aside { font-size: 12px; color: #43574f; line-height: 2.9; border-left: 1px solid var(--line); padding-left: 26px; }
.plans { grid-template-columns: 1fr; gap: 30px; }
.plan-grid { display: grid; grid-template-columns: 1fr 1fr; width: 100%; gap: 22px; }
.plan { padding: 32px; border: 1px solid var(--line); border-top: 3px solid var(--ink); }
.plan-label { font-size: 16px; font-weight: 600; margin: 0 0 24px; }
.plan h3 { font-size: 30px; font-weight: 600; margin: 0 0 24px; }
.plan h3 > span { display: block; font-size: 12px; font-weight: 400; color: var(--muted); margin-top: 10px; }
.plan ul { list-style: none; margin: 0; padding: 22px 0; border-block: 1px solid var(--line); font-size: 13px; line-height: 2.7; }
.plan li:before { content: "—"; padding-right: 13px; color: #526970; }
.plan-note { font-size: 12px; color: var(--muted); margin: 22px 0 0; line-height: 1.7; }
.pro { background: var(--night); color: var(--light); border-color: var(--night); border-top-color: var(--accent); }
.pro h3 > span, .pro .plan-note { color: #c1cace; }
.pro ul { border-color: #ffffff30; }
.pro li:before { color: var(--accent); }
.pro-badge { font-size: 9px; letter-spacing: 1px; border: 1px solid #ffffff40; padding: 4px 6px; vertical-align: middle; margin-left: 8px; }
.price-note { font-size: 11px; color: var(--muted); line-height: 1.7; margin: -10px 0 0; }
.faq { display: grid; grid-template-columns: 1fr 1.2fr; gap: 75px; border-top: 1px solid var(--line); padding-block: 54px; }
.faq h2 { font-size: 29px; font-weight: 600; letter-spacing: -.5px; }
.questions details { border-bottom: 1px solid var(--line); }
summary { padding: 22px 0; cursor: pointer; list-style: none; font-size: 14px; font-weight: 500; display: flex; justify-content: space-between; gap: 20px; }
summary::-webkit-details-marker { display: none; }
summary span { color: var(--muted); font-size: 18px; }
details[open] summary span { transform: rotate(45deg); }
details p { font-size: 13px; line-height: 1.9; color: var(--muted); padding: 0 25px 20px 0; margin: 0; }
.closing { text-align: center; padding: 66px 0 76px; border-top: 1px solid var(--line); }
.closing img { border-radius: 16px; width: 64px; height: 64px; margin-bottom: 17px; }
.closing h2 { font-size: 45px; line-height: 1.35; margin: 20px 0; }
.closing > p:not(.eyebrow) { font-size: 14px; color: var(--muted); }
.release-state { display: table; border: 1px solid var(--line); padding: 14px 23px; margin: 27px auto 22px; font-size: 12px; }
.release-state .dot { background: #617775; }
footer { border-top: 1px solid var(--line); padding: 32px 0; }
.footer-top, .footer-bottom { display: flex; justify-content: space-between; align-items: center; gap: 20px; }
.footer-top > div { display: flex; gap: 26px; font-size: 12px; }
.footer-bottom { margin-top: 27px; font-size: 10px; color: var(--muted); line-height: 1.8; }
html[lang=en] h1 { font-family: Georgia, "Times New Roman", serif; font-size: clamp(50px, 5.1vw, 68px); letter-spacing: -2.5px; line-height: 1.17; font-weight: 600; }
html[lang=en] .hero-description { font-size: 14px; }
html[lang=en] .manifesto p { font-size: 28px; line-height: 1.45; }
html[lang=en] .section-heading h2 { font-size: 35px; line-height: 1.25; }
html[lang=en] .privacy-panel h2 { font-size: 29px; line-height: 1.3; }
html[lang=en] .phone-content h3 { font-size: 17px; }
html[lang=en] .result-label { font-size: 8px; letter-spacing: .5px; }
html[lang=en] .plan h3 { font-size: 28px; }
html[lang=en] .closing h2 { font-size: 39px; }
@media (max-width: 1050px) {
  .wrap { width: calc(100% - 64px); }
  .nav, .hero { width: 100%; padding-inline: 32px; }
  .nav nav { gap: 20px; }
  .hero { gap: 28px; }
  .hero-art { padding-left: 20px; }
  .hero-actions { gap: 18px; }
  .hero .button { padding-inline: 18px; gap: 18px; }
  .section, .faq { gap: 40px; }
  .privacy-panel { padding: 32px; grid-template-columns: .5fr 1.6fr; }
  .privacy-aside { display: none; }
  .nav-actions { gap: 16px; }
  html[lang=en] h1 { font-size: 49px; }
}
@media (max-width: 700px) {
  .wrap { width: calc(100% - 40px); }
  .nav { width: 100%; height: 80px; padding-inline: 20px; gap: 12px; }
  .nav nav { display: none; }
  .brand { font-size: 22px; }
  .brand small { display: none; }
  .nav-cta { padding: 10px 12px; font-size: 11px; }
  .nav-cta span { margin-left: 12px; }
  .nav-actions { gap: 15px; }
  .language-switch { font-size: 11px; }
  .hero { width: 100%; grid-template-columns: 1fr; padding: 24px 20px 28px; gap: 30px; }
  .hero-copy { padding: 10px 0 0; }
  .eyebrow { font-size: 10px; letter-spacing: 1.2px; }
  h1 { font-size: 64px; margin: 25px 0; letter-spacing: -2px; }
  .hero-description { font-size: 13px; line-height: 1.95; }
  .hero-description br { display: none; }
  .hero-actions { gap: 22px; margin-top: 26px; }
  .button { padding: 16px 18px; font-size: 12px; }
  .text-link { font-size: 11px; gap: 12px; }
  .micro { font-size: 10px; margin-top: 19px; }
  .hero-art { min-height: 615px; border-left: 0; padding-left: 0; }
  .art-note, .demo-caption { left: 0; }
  .art-note { padding-top: 15px; font-size: 9px; }
  .phone { width: 263px; height: 532px; }
  .demo-caption { font-size: 9px; padding-bottom: 12px; }
  .manifesto { grid-template-columns: 1fr; padding-block: 29px; gap: 15px; }
  .section-index { margin: 0; font-size: 10px; }
  .manifesto p { font-size: 25px; }
  .section { padding-block: 58px; grid-template-columns: 1fr; gap: 25px; }
  .section-heading h2 { font-size: 31px; }
  .section-heading > p:last-child, .privacy-panel p:not(.eyebrow) { font-size: 13px; }
  .steps article { padding: 23px 0; gap: 18px; }
  .steps h3 { font-size: 16px; }
  .steps article p br { display: none; }
  .privacy-panel { padding: 28px 24px; grid-template-columns: 1fr; gap: 15px; }
  .privacy-symbol { width: 42px; height: 54px; border-radius: 0 0 22px 22px; }
  .privacy-symbol span { width: 20px; height: 25px; }
  .privacy-symbol span:after { top: 11px; left: 8px; height: 6px; }
  .privacy-panel h2 { font-size: 27px; }
  .plan-grid { grid-template-columns: 1fr; gap: 18px; }
  .plan { padding: 26px; }
  .price-note { margin: 0; }
  .faq { grid-template-columns: 1fr; gap: 10px; padding-block: 38px; }
  .faq h2 { font-size: 27px; }
  summary { font-size: 13px; }
  .closing { padding-block: 44px 54px; }
  .closing h2 { font-size: 36px; }
  .footer-top { align-items: flex-start; }
  .footer-top > div { flex-direction: column; gap: 16px; font-size: 11px; }
  .footer-bottom { display: block; font-size: 9px; }
  .footer-bottom a { display: block; margin-top: 10px; }
  html[lang=en] h1 { font-size: 48px; letter-spacing: -1.7px; }
  html[lang=en] .hero-description { font-size: 13px; }
  html[lang=en] .hero-actions { gap: 18px; }
  html[lang=en] .manifesto p { font-size: 24px; }
  html[lang=en] .section-heading h2 { font-size: 30px; }
  html[lang=en] .closing h2 { font-size: 31px; }
  html[lang=en] .privacy-panel h2 { font-size: 26px; }
  html[lang=en] .plan h3 { font-size: 26px; }
}
@media (max-width: 360px) {
  h1 { font-size: 57px; }
  html[lang=en] h1 { font-size: 42px; }
  .brand { font-size: 20px; }
  .nav-actions { gap: 10px; }
  .hero-actions { gap: 15px; }
  .hero .button { font-size: 11px; gap: 10px; padding-inline: 14px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *:before, *:after { transition: none !important; animation: none !important; }
}