:root {
  --paper: #f8f5ef;
  --surface: #ffffff;
  --ink: #0b2138;
  --muted: #667587;
  --line: #e6e1d8;
  --mint: #19b887;
  --mint-dark: #087d61;
  --amber: #f8bb4c;
  --blue: #4f83eb;
  --violet: #9b5de5;
  --shadow: 0 24px 70px rgba(11, 33, 56, .12);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 84% 14%, rgba(25, 184, 135, .13), transparent 32rem),
    radial-gradient(circle at 10% 72%, rgba(248, 187, 76, .12), transparent 28rem),
    var(--paper);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button, a { -webkit-tap-highlight-color: transparent; }
.container { width: min(1180px, calc(100% - 40px)); margin-inline: auto; }
body[data-lang="zh"] .lang.en, body[data-lang="en"] .lang.zh { display: none !important; }

.site-header {
  position: relative;
  z-index: 20;
  display: flex;
  min-height: 82px;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand { display: inline-flex; align-items: center; gap: 12px; }
.brand img { width: 44px; height: 44px; border-radius: 13px; box-shadow: 0 8px 20px rgba(11,33,56,.12); }
.brand-name { display: block; margin: 0; font-size: 17px; font-weight: 900; letter-spacing: -.03em; }
.brand-name span { color: var(--muted); font-weight: 650; }
.brand-tag { display: block; margin: 3px 0 0; color: var(--mint-dark); font-size: 9px; font-weight: 850; letter-spacing: .16em; text-transform: uppercase; }
.nav { display: flex; align-items: center; gap: 28px; margin-left: auto; color: var(--muted); font-size: 14px; font-weight: 700; }
.nav a:hover, .footer a:hover { color: var(--ink); }
.language-toggle {
  display: inline-flex;
  height: 40px;
  align-items: center;
  gap: 8px;
  padding: 0 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--ink);
  background: rgba(255,255,255,.72);
  box-shadow: 0 8px 24px rgba(11,33,56,.07);
  font: inherit;
  font-size: 13px;
  font-weight: 800;
  cursor: pointer;
}

.hero { position: relative; display: grid; min-height: calc(100vh - 82px); grid-template-columns: 1.04fr .96fr; align-items: center; gap: 52px; padding-block: 34px 82px; }
.eyebrow { display: inline-flex; align-items: center; gap: 9px; padding: 9px 14px; border: 1px solid rgba(25,184,135,.22); border-radius: 999px; color: var(--mint-dark); background: rgba(25,184,135,.08); font-size: 11px; font-weight: 900; letter-spacing: .13em; text-transform: uppercase; }
.hero h1 { margin: 24px 0 0; max-width: 700px; font-size: clamp(52px, 7.2vw, 100px); line-height: .95; letter-spacing: -.068em; font-weight: 950; }
.hero h1 strong { color: var(--mint); font-weight: inherit; }
.hero-lead { max-width: 600px; margin: 28px 0 0; color: var(--muted); font-size: 18px; line-height: 1.8; }
.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 18px; margin-top: 30px; }
.primary-button { display: inline-flex; min-height: 52px; align-items: center; padding: 0 24px; border-radius: 999px; color: #fff; background: var(--mint); box-shadow: 0 15px 34px rgba(25,184,135,.24); font-size: 15px; font-weight: 850; transition: transform .2s ease; }
.primary-button:hover { transform: translateY(-2px); }
.availability { color: var(--muted); font-size: 14px; font-weight: 700; }
.proof-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; max-width: 590px; margin-top: 40px; }
.proof { padding: 17px; border: 1px solid var(--line); border-radius: 19px; background: rgba(255,255,255,.72); box-shadow: 0 12px 36px rgba(11,33,56,.05); }
.proof b { display: block; font-size: 14px; }
.proof p { margin: 7px 0 0; color: var(--muted); font-size: 12px; line-height: 1.6; }
.device-stage { position: relative; display: flex; min-height: 690px; align-items: center; justify-content: center; }
.device-stage::before, .device-stage::after { position: absolute; content: ""; border-radius: 999px; filter: blur(45px); }
.device-stage::before { top: 8%; left: 4%; width: 210px; height: 210px; background: rgba(255,209,133,.52); }
.device-stage::after { right: 0; bottom: 4%; width: 270px; height: 270px; background: rgba(25,184,135,.2); }
.phone { position: relative; z-index: 2; width: min(375px, 78vw); padding: 10px; border-radius: 54px; background: linear-gradient(145deg,#10243a,#07131f 64%,#26394a); box-shadow: 0 40px 90px rgba(11,33,56,.25), inset 0 0 0 1px rgba(255,255,255,.24); transform: rotate(2.5deg); }
.phone img { display: block; width: 100%; aspect-ratio: 1206/2622; object-fit: cover; border-radius: 45px; }
.cost-card { position: absolute; z-index: 3; left: 1%; bottom: 14%; padding: 14px 18px; border: 1px solid rgba(255,255,255,.9); border-radius: 18px; background: rgba(255,255,255,.9); box-shadow: var(--shadow); backdrop-filter: blur(14px); }
.cost-card small { color: var(--muted); font-size: 9px; font-weight: 850; letter-spacing: .15em; }
.cost-card p { margin: 5px 0 0; font-size: 22px; font-weight: 950; }
.cost-card em { color: var(--mint-dark); font-size: 11px; font-style: normal; }

.section { padding-block: 100px; }
.surface-section { background: rgba(255,255,255,.72); backdrop-filter: blur(10px); }
.kicker { margin: 0; color: var(--mint-dark); font-size: 11px; font-weight: 950; letter-spacing: .2em; text-transform: uppercase; }
.section-title { max-width: 830px; margin: 15px 0 0; font-size: clamp(40px, 6vw, 66px); line-height: 1.02; letter-spacing: -.055em; font-weight: 950; }
.feature-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; margin-top: 48px; }
.feature { min-height: 270px; padding: 30px; border: 1px solid var(--line); border-radius: 28px; background: #fbfaf6; transition: transform .25s ease, box-shadow .25s ease; }
.feature:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.feature-icon { display: grid; width: 50px; height: 50px; place-items: center; border-radius: 17px; font-size: 25px; }
.mint { color: var(--mint-dark); background: #def7ee; }
.amber { color: #915b00; background: #fff0d1; }
.blue { color: #356bd7; background: #e6efff; }
.violet { color: #7948c7; background: #efe7ff; }
.feature-number { margin: 44px 0 0; color: var(--muted); font-size: 10px; font-weight: 850; letter-spacing: .18em; }
.feature h3 { margin: 8px 0 0; font-size: 25px; letter-spacing: -.035em; }
.feature p { max-width: 470px; margin: 11px 0 0; color: var(--muted); font-size: 15px; line-height: 1.75; }
.watch-panel { display: grid; grid-template-columns: .82fr 1.18fr; align-items: center; gap: 52px; margin-top: 70px; padding: 54px; overflow: hidden; border-radius: 35px; color: #fff; background: var(--ink); }
.watch-panel h3 { margin: 20px 0 0; font-size: clamp(38px, 5vw, 56px); line-height: 1.04; letter-spacing: -.05em; }
.watch-panel p { color: rgba(255,255,255,.66); line-height: 1.8; }
.screen-card { overflow: hidden; border: 1px solid rgba(255,255,255,.14); border-radius: 27px; background: var(--paper); box-shadow: 0 30px 60px rgba(0,0,0,.25); }
.screen-card img { display: block; width: 100%; }
.calm-grid { display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: 70px; }
.screen-pair { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; max-width: 580px; }
.screen-pair figure { margin: 0; overflow: hidden; padding: 7px; border: 1px solid var(--line); border-radius: 28px; background: #fff; box-shadow: var(--shadow); }
.screen-pair figure:nth-child(2) { transform: translateY(60px); }
.screen-pair img { display: block; width: 100%; border-radius: 22px; }
.calm-copy ul { margin: 34px 0 0; padding: 0; list-style: none; }
.calm-copy li { position: relative; margin-top: 20px; padding-left: 34px; color: var(--muted); line-height: 1.75; }
.calm-copy li::before { position: absolute; left: 0; top: 1px; color: var(--mint); content: "✓"; font-weight: 950; }
.calm-copy strong { color: var(--ink); }
.cta-band { padding: 74px 30px; border-radius: 36px; text-align: center; background: var(--amber); }
.cta-band img { width: 82px; height: 82px; border-radius: 23px; box-shadow: 0 14px 30px rgba(11,33,56,.18); }
.cta-band h2 { margin: 24px auto 0; font-size: clamp(40px, 6vw, 66px); line-height: 1; letter-spacing: -.055em; }
.cta-band p { max-width: 700px; margin: 18px auto 0; color: rgba(11,33,56,.66); line-height: 1.7; }
.dark-button { display: inline-flex; min-height: 50px; align-items: center; margin-top: 28px; padding: 0 24px; border-radius: 999px; color: #fff; background: var(--ink); font-size: 14px; font-weight: 850; }
.footer { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding-block: 30px; color: var(--muted); font-size: 13px; }
.footer-links { display: flex; flex-wrap: wrap; gap: 22px; }

.legal-page { min-height: 100vh; }
.legal-header { border-bottom: 1px solid rgba(230,225,216,.8); }
.back-link { display: inline-flex; align-items: center; gap: 8px; padding: 10px 15px; border: 1px solid var(--line); border-radius: 999px; background: rgba(255,255,255,.72); font-size: 13px; font-weight: 800; }
.legal-main { width: min(920px, calc(100% - 40px)); margin-inline: auto; padding: 84px 0 110px; }
.legal-main h1 { max-width: 850px; margin: 16px 0 0; font-size: clamp(47px, 8vw, 76px); line-height: 1; letter-spacing: -.058em; }
.legal-intro { max-width: 780px; margin: 24px 0 0; color: var(--muted); font-size: 18px; line-height: 1.75; }
.legal-copy section { margin-top: 42px; padding-top: 42px; border-top: 1px solid var(--line); }
.legal-copy h2 { margin: 0; font-size: 25px; letter-spacing: -.025em; }
.legal-copy h3 { margin: 27px 0 0; font-size: 17px; }
.legal-copy p, .legal-copy li { color: var(--muted); font-size: 15px; line-height: 1.9; }
.legal-copy strong { color: var(--ink); }
.legal-copy a { color: var(--mint-dark); font-weight: 800; text-decoration: underline; text-underline-offset: 3px; }
.legal-copy ul { padding-left: 22px; }
.support-box { padding: 28px !important; border: 1px solid rgba(25,184,135,.3) !important; border-radius: 24px; background: rgba(255,255,255,.74); }
.support-email { font-size: clamp(24px, 5vw, 38px); font-weight: 950; letter-spacing: -.035em; }

@media (max-width: 900px) {
  .nav { display: none; }
  .hero { grid-template-columns: 1fr; padding-top: 55px; }
  .hero-copy { text-align: center; }
  .hero-lead, .proof-grid { margin-inline: auto; }
  .hero-actions { justify-content: center; }
  .device-stage { min-height: 650px; }
  .feature-grid, .watch-panel, .calm-grid { grid-template-columns: 1fr; }
  .watch-panel { padding: 32px; }
  .screen-pair { margin-inline: auto; }
  .calm-copy { margin-top: 65px; }
}

@media (max-width: 580px) {
  .container { width: min(100% - 28px, 1180px); }
  .site-header { min-height: 72px; }
  .brand-tag { display: none; }
  .brand-name { font-size: 15px; }
  .brand img { width: 39px; height: 39px; border-radius: 11px; }
  .language-toggle { padding-inline: 13px; }
  .hero { min-height: auto; padding-block: 48px 72px; }
  .hero h1 { font-size: clamp(47px, 15vw, 66px); }
  .hero-lead { font-size: 16px; line-height: 1.75; }
  .proof-grid, .feature-grid { grid-template-columns: 1fr; }
  .device-stage { min-height: 610px; }
  .phone { width: min(335px, 84vw); }
  .cost-card { left: 0; bottom: 9%; }
  .section { padding-block: 76px; }
  .feature { min-height: 245px; padding: 25px; }
  .watch-panel { margin-top: 46px; padding: 27px; }
  .screen-pair { gap: 8px; }
  .cta-band { padding: 58px 20px; }
  .footer { align-items: flex-start; flex-direction: column; }
  .legal-main { width: min(100% - 30px, 920px); padding-top: 58px; }
  .back-label { display: none; }
}

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