:root {
  --ink: #17332e;
  --ink-soft: #48635d;
  --paper: #f7fbf9;
  --white: #ffffff;
  --mint: #a7e4cf;
  --mint-deep: #247f68;
  --sky: #b9ddf6;
  --peach: #ffd1b8;
  --butter: #f5e5a7;
  --line: rgba(23, 51, 46, 0.12);
  --shadow: 0 30px 80px rgba(39, 87, 75, 0.13);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "PingFang SC", "Noto Sans CJK SC", "Microsoft YaHei", sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; height: auto; }
button, a { -webkit-tap-highlight-color: transparent; }
.skip-link {
  position: fixed;
  z-index: 100;
  top: 10px;
  left: 10px;
  padding: 11px 15px;
  border-radius: 10px;
  color: #fff;
  background: var(--ink);
  transform: translateY(-150%);
  transition: transform .2s ease;
}
.skip-link:focus { transform: translateY(0); }
a:focus-visible { outline: 3px solid rgba(36, 127, 104, .42); outline-offset: 4px; border-radius: 6px; }

.site-header {
  width: min(1200px, calc(100% - 48px));
  height: 84px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 36px;
  position: relative;
  z-index: 20;
}
.brand { display: flex; align-items: center; gap: 11px; font-weight: 780; font-size: 20px; letter-spacing: .05em; }
.brand img { border-radius: 12px; box-shadow: 0 8px 24px rgba(28, 95, 78, .2); }
.site-header nav { display: flex; align-items: center; gap: 30px; margin-left: auto; font-size: 14px; color: var(--ink-soft); }
.site-header nav a { transition: color .2s ease; }
.site-header nav a:hover { color: var(--mint-deep); }
.site-header nav a[aria-current="page"] { color: var(--ink); font-weight: 720; }
.language-link { margin-left: 4px; color: var(--mint-deep); font-size: 12px; font-weight: 760; letter-spacing: .06em; }
.header-pill { padding: 9px 14px; border: 1px solid var(--line); border-radius: 999px; font-size: 12px; color: var(--mint-deep); background: rgba(255,255,255,.75); }

.hero {
  width: min(1200px, calc(100% - 48px));
  min-height: 700px;
  margin: 12px auto 70px;
  border-radius: 38px;
  position: relative;
  overflow: hidden;
  display: grid;
  grid-template-columns: 1.02fr .98fr;
  background:
    radial-gradient(circle at 88% 12%, rgba(255,255,255,.95), transparent 28%),
    linear-gradient(135deg, #e1f5ed 0%, #d5eef0 58%, #dcecfb 100%);
  box-shadow: var(--shadow);
}
.hero::before {
  content: "";
  position: absolute;
  width: 330px;
  height: 330px;
  border: 1px solid rgba(36,127,104,.12);
  border-radius: 50%;
  left: -180px;
  top: 80px;
}
.hero-copy { align-self: center; padding: 88px 30px 88px 76px; position: relative; z-index: 2; }
.eyebrow { display: inline-block; color: var(--mint-deep); font-size: 11px; letter-spacing: .2em; font-weight: 760; text-transform: uppercase; }
.hero h1 { margin: 20px 0 24px; font-size: clamp(56px, 6.4vw, 92px); line-height: .98; letter-spacing: -.07em; font-weight: 810; }
.hero h1 em { color: var(--mint-deep); font-style: normal; }
.hero-lede { max-width: 510px; margin: 0; color: var(--ink-soft); font-size: 18px; line-height: 1.9; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 36px; }
.button { display: inline-flex; min-height: 49px; padding: 0 22px; align-items: center; justify-content: center; border-radius: 15px; font-size: 14px; font-weight: 700; transition: transform .2s ease, box-shadow .2s ease; }
.button:hover { transform: translateY(-2px); }
.button.primary { color: #fff; background: var(--ink); box-shadow: 0 12px 30px rgba(23,51,46,.22); }
.button.secondary { border: 1px solid rgba(23,51,46,.17); background: rgba(255,255,255,.55); }
.trust-row { display: flex; flex-wrap: wrap; gap: 16px; margin-top: 34px; color: #536c66; font-size: 12px; }
.trust-row span { display: flex; align-items: center; gap: 7px; }
.trust-row span::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: #55aa8e; }

.hero-visual { min-width: 0; position: relative; }
.sun-orb { position: absolute; right: 6%; top: 11%; width: 330px; height: 330px; border-radius: 50%; background: rgba(255,255,255,.72); box-shadow: inset 0 0 0 1px rgba(255,255,255,.8); }
.sound-rings { position: absolute; top: 170px; right: 90px; width: 320px; height: 320px; }
.sound-rings i { position: absolute; inset: 0; border: 1px solid rgba(45,136,111,.14); border-radius: 50%; }
.sound-rings i:nth-child(2) { inset: 50px; }
.sound-rings i:nth-child(3) { inset: 100px; }
.phone-frame { position: absolute; width: 286px; right: 20%; bottom: -82px; padding: 8px; border-radius: 45px; background: #183630; box-shadow: 0 40px 80px rgba(17,58,49,.35); transform: rotate(2.5deg); }
.phone-frame::before { content: ""; position: absolute; z-index: 2; width: 82px; height: 22px; border-radius: 999px; background: #183630; top: 14px; left: 50%; transform: translateX(-50%); }
.phone-frame img { border-radius: 37px; }
.floating-note { position: absolute; z-index: 4; display: flex; flex-direction: column; gap: 5px; padding: 15px 18px; border: 1px solid rgba(255,255,255,.82); border-radius: 17px; background: rgba(255,255,255,.78); backdrop-filter: blur(16px); box-shadow: 0 18px 46px rgba(50,96,85,.14); }
.floating-note b { font-size: 13px; }
.floating-note span { font-size: 11px; color: var(--ink-soft); }
.note-one { left: 1%; top: 21%; }
.note-two { right: 3%; bottom: 14%; }

.intro-strip { width: min(1050px, calc(100% - 48px)); margin: 0 auto 100px; display: flex; justify-content: center; align-items: center; gap: 24px; text-align: center; }
.intro-strip p { color: var(--ink-soft); font-size: 13px; }
.intro-strip strong { font-size: 17px; }
.intro-strip span { color: #8baaa2; }

.section { width: min(1120px, calc(100% - 48px)); margin: 0 auto 130px; }
.section-heading { display: grid; grid-template-columns: 1.25fr .75fr; gap: 80px; align-items: end; margin-bottom: 42px; }
.section-heading h2, .science-copy h2, .privacy-section h2, .price-copy h2 { margin: 14px 0 0; font-size: clamp(38px, 5vw, 64px); line-height: 1.1; letter-spacing: -.05em; }
.section-heading > p { margin: 0 0 5px; font-size: 15px; line-height: 1.85; color: var(--ink-soft); }
.feature-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.feature-card { min-height: 318px; padding: 28px; border-radius: 28px; display: flex; flex-direction: column; }
.feature-card.mint { background: #cdeee2; }
.feature-card.sky { background: #d6eafa; }
.feature-card.peach { background: #ffe2d2; }
.feature-card.butter { background: #f7edc8; }
.feature-index { color: rgba(23,51,46,.48); font-size: 12px; font-weight: 700; }
.feature-card h3 { margin: auto 0 14px; font-size: 24px; letter-spacing: -.03em; }
.feature-card p { margin: 0; color: var(--ink-soft); line-height: 1.75; font-size: 14px; }

.science-section { display: grid; grid-template-columns: 1fr .82fr; gap: 110px; align-items: center; padding-top: 25px; }
.science-copy > p { margin: 25px 0 30px; color: var(--ink-soft); line-height: 1.9; font-size: 16px; }
.method-list { margin: 0 0 24px; padding: 0; list-style: none; counter-reset: method; }
.method-list li { display: grid; grid-template-columns: 1fr 1.15fr; gap: 14px; padding: 18px 0; border-top: 1px solid var(--line); counter-increment: method; }
.method-list b { font-size: 14px; }
.method-list span { color: var(--ink-soft); font-size: 13px; line-height: 1.6; }
.text-link { color: var(--mint-deep); font-size: 14px; font-weight: 750; }
.science-visual { width: 100%; max-width: 440px; justify-self: center; padding: 10px; border-radius: 38px; background: #1e4038; box-shadow: var(--shadow); transform: rotate(1.8deg); }
.science-visual img { width: 100%; border-radius: 30px; }

.companion-section { width: min(1200px, calc(100% - 48px)); padding: 70px 54px 54px; border-radius: 38px; color: #f3fffb; background: #173f37; overflow: hidden; }
.section-heading.inverse .eyebrow { color: #8cd7bd; }
.section-heading.inverse > p { color: #bed2cc; }
.device-grid { display: grid; grid-template-columns: .7fr 1.6fr .7fr; gap: 24px; align-items: center; }
.device-grid article { align-self: stretch; padding: 26px; border-radius: 25px; background: rgba(255,255,255,.07); border: 1px solid rgba(255,255,255,.08); }
.device-label { display: flex; flex-direction: column; gap: 6px; }
.device-label span { color: #94d9c1; font-size: 12px; letter-spacing: .12em; text-transform: uppercase; }
.device-label b { font-size: 22px; }
.device-grid ul { margin: 70px 0 0; padding: 0; list-style: none; color: #bed2cc; font-size: 13px; line-height: 1.8; }
.device-grid li { margin-top: 12px; padding-top: 12px; border-top: 1px solid rgba(255,255,255,.08); }
.desktop-shot { align-self: end; padding: 9px; border-radius: 22px; background: #0b1e1a; box-shadow: 0 32px 70px rgba(0,0,0,.35); transform: translateY(25px); }
.desktop-shot img { border-radius: 14px; }

.privacy-section { display: grid; grid-template-columns: 220px 1fr 1fr; align-items: center; gap: 60px; padding: 45px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.privacy-emblem { width: 190px; height: 190px; display: grid; place-items: center; border-radius: 50%; font-weight: 800; letter-spacing: .12em; color: var(--mint-deep); background: radial-gradient(circle at 35% 30%, #fff 0, #d1eee4 65%, #b7dfd1 100%); box-shadow: var(--shadow); }
.privacy-copy p { color: var(--ink-soft); line-height: 1.9; font-size: 15px; margin: 0 0 22px; }

.pricing-section { width: min(1000px, calc(100% - 48px)); margin: 0 auto 110px; }
.price-card { display: grid; grid-template-columns: auto 1fr auto; gap: 34px; align-items: center; padding: 38px; border-radius: 32px; background: linear-gradient(130deg, #effaf6, #e9f4fb); border: 1px solid rgba(43,126,104,.13); box-shadow: var(--shadow); }
.price-card > img { border-radius: 28px; box-shadow: 0 14px 35px rgba(24,88,72,.2); }
.price-copy h2 { font-size: clamp(30px, 4vw, 48px); }
.price-copy p { margin: 13px 0 0; color: var(--ink-soft); font-size: 14px; }
.price-block { min-width: 210px; padding-left: 34px; border-left: 1px solid var(--line); display: flex; flex-direction: column; align-items: flex-start; }
.price-block > span:first-child { color: var(--ink-soft); font-size: 12px; }
.price-block strong { margin-top: 5px; font-size: 54px; letter-spacing: -.05em; }
.price-block .store-status { margin: 9px 0 5px; max-width: 220px; font-size: 35px; line-height: 1.06; letter-spacing: -.045em; }
.price-block small { font-size: 22px; }
.price-block p { margin: -2px 0 16px; color: var(--ink-soft); font-size: 12px; }
.store-button { width: 100%; padding: 12px 16px; border-radius: 13px; text-align: center; color: #fff; background: var(--ink); box-shadow: 0 10px 22px rgba(23,51,46,.16); font-size: 12px; font-weight: 700; transition: transform .2s ease, box-shadow .2s ease; }
.store-button:hover { transform: translateY(-2px); box-shadow: 0 14px 28px rgba(23,51,46,.22); }
.price-note { text-align: center; color: #789089; font-size: 11px; }

.site-footer { width: min(1120px, calc(100% - 48px)); margin: 0 auto; padding: 46px 0 34px; border-top: 1px solid var(--line); display: grid; grid-template-columns: 1fr auto; gap: 18px; color: var(--ink-soft); }
.footer-brand { color: var(--ink); font-size: 20px; font-weight: 800; }
.site-footer p { margin: 7px 0 0; font-size: 12px; }
.footer-links { display: flex; align-items: center; gap: 24px; font-size: 12px; }
.copyright { grid-column: 1 / -1; padding-top: 20px; border-top: 1px solid rgba(23,51,46,.07); }

.legal-shell { width: min(860px, calc(100% - 48px)); margin: 70px auto 110px; }
.legal-heading { max-width: 720px; margin: 0 auto 42px; text-align: center; }
.legal-heading h1 { margin: 17px 0 18px; font-size: clamp(45px, 7vw, 72px); letter-spacing: -.06em; line-height: 1.05; }
.legal-heading > p { color: var(--ink-soft); font-size: 15px; line-height: 1.8; }
.legal-card { padding: 32px 62px; border: 1px solid var(--line); border-radius: 32px; background: rgba(255,255,255,.8); box-shadow: 0 28px 70px rgba(39,87,75,.08); }
.legal-card section { padding: 28px 0; border-bottom: 1px solid var(--line); }
.legal-card section:last-child { border-bottom: 0; }
.legal-card h2 { margin: 0 0 14px; font-size: 22px; letter-spacing: -.02em; }
.legal-card p { color: var(--ink-soft); font-size: 15px; line-height: 1.9; }
.legal-card a:not(.button) { color: var(--mint-deep); font-weight: 650; text-decoration: underline; text-underline-offset: 4px; }
.support-callout { display: flex; align-items: center; justify-content: space-between; gap: 30px; }
.support-callout h2, .support-callout p { margin: 0; }
.support-callout p { margin-top: 8px; }
.support-callout .button { flex: 0 0 auto; color: #fff; text-decoration: none; }
.honesty-note { margin-top: 24px; padding: 22px; border-radius: 18px; background: #fff2e9; }
.honesty-note b { color: #a45532; font-size: 13px; }
.honesty-note p { margin-bottom: 0; color: #765142; }

.not-found {
  width: min(620px, calc(100% - 40px));
  min-height: 100vh;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
}
.not-found > img { border-radius: 28px; box-shadow: var(--shadow); margin-bottom: 34px; }
.not-found h1 { margin: 14px 0 18px; font-size: clamp(48px, 8vw, 76px); letter-spacing: -.06em; }
.not-found > p:not(.eyebrow) { margin: 0; color: var(--ink-soft); font-size: 16px; line-height: 1.8; }
.not-found .hero-actions { justify-content: center; }

.english .hero h1 { font-size: clamp(54px, 5.8vw, 84px); letter-spacing: -.06em; }
.english .hero-lede { line-height: 1.75; }
.english .feature-card h3 { font-size: 22px; }
.english .privacy-emblem { font-size: 13px; letter-spacing: .08em; }

@media (max-width: 980px) {
  .hero { grid-template-columns: 1fr; min-height: 1100px; }
  .hero-copy { padding: 70px 58px 40px; }
  .hero-visual { min-height: 570px; }
  .phone-frame { right: 31%; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .science-section { gap: 55px; }
  .device-grid { grid-template-columns: 1fr 1.6fr; }
  .device-grid article:last-child { grid-column: 1 / -1; }
  .device-grid article:last-child ul { margin-top: 20px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
  .privacy-section { grid-template-columns: 170px 1fr; }
  .privacy-emblem { width: 160px; height: 160px; }
  .privacy-copy { grid-column: 2; }
}

@media (max-width: 720px) {
  .site-header { width: min(100% - 30px, 1200px); height: 72px; }
  .site-header nav { display: none; }
  .language-link { margin-left: auto; }
  .header-pill { display: none; }
  .hero, .section, .companion-section, .pricing-section, .site-footer { width: min(100% - 24px, 1200px); }
  .hero { margin-top: 2px; min-height: 1000px; border-radius: 28px; }
  .hero-copy { padding: 48px 25px 30px; }
  .hero h1 { font-size: 52px; }
  .english .hero h1 { font-size: 48px; }
  .hero-lede { font-size: 16px; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-visual { min-height: 565px; }
  .sun-orb { width: 270px; height: 270px; right: 0; }
  .phone-frame { width: 250px; right: calc(50% - 125px); bottom: -45px; }
  .note-one { left: 12px; top: 19%; }
  .note-two { right: 12px; bottom: 10%; }
  .intro-strip { width: calc(100% - 34px); margin-bottom: 80px; gap: 8px; flex-wrap: wrap; }
  .intro-strip p { width: 100%; margin: 0 0 7px; }
  .section { margin-bottom: 95px; }
  .section-heading { grid-template-columns: 1fr; gap: 20px; }
  .section-heading h2, .science-copy h2, .privacy-section h2 { font-size: 40px; }
  .feature-grid { grid-template-columns: 1fr; }
  .feature-card { min-height: 255px; }
  .science-section { grid-template-columns: 1fr; gap: 45px; }
  .science-visual { max-width: 330px; }
  .method-list li { grid-template-columns: 1fr; gap: 8px; }
  .companion-section { padding: 52px 20px 34px; border-radius: 28px; }
  .device-grid { grid-template-columns: 1fr; }
  .desktop-shot { grid-row: 2; transform: none; }
  .device-grid article:last-child { grid-column: auto; }
  .device-grid article:last-child ul { display: block; }
  .device-grid ul { margin-top: 24px; }
  .privacy-section { grid-template-columns: 1fr; gap: 28px; }
  .privacy-emblem { width: 120px; height: 120px; }
  .privacy-copy { grid-column: auto; }
  .price-card { grid-template-columns: 1fr; text-align: center; padding: 30px 24px; }
  .price-card > img { margin: 0 auto; }
  .price-block { min-width: 0; padding: 24px 0 0; border-left: 0; border-top: 1px solid var(--line); align-items: center; }
  .site-footer { grid-template-columns: 1fr; }
  .footer-links { flex-wrap: wrap; gap: 15px; }
  .legal-shell { width: calc(100% - 24px); margin-top: 50px; }
  .legal-card { padding: 15px 24px; border-radius: 25px; }
  .support-callout { align-items: stretch; flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}