:root {
  color-scheme: light;
  --ink: #172923;
  --paper: #f6f3e9;
  --card: #fffdf7;
  --lime: #d8f279;
  --muted: #5f6f68;
  --line: #d8ddd5;
  --shadow: 0 18px 55px rgba(23, 41, 35, 0.12);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 17px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
a { color: inherit; text-underline-offset: 4px; }
img { max-width: 100%; }
.wrap { width: min(1120px, calc(100% - 40px)); margin: 0 auto; }
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: color-mix(in srgb, var(--paper) 92%, transparent);
  border-bottom: 1px solid color-mix(in srgb, var(--line) 80%, transparent);
  backdrop-filter: blur(16px);
}
.nav { min-height: 68px; display: flex; align-items: center; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 11px; font-weight: 800; text-decoration: none; }
.brand img { width: 38px; height: 38px; border-radius: 9px; box-shadow: 0 5px 14px rgba(23, 41, 35, .18); }
.links { display: flex; align-items: center; gap: 22px; margin-left: auto; }
.links a { font-size: 14px; font-weight: 650; text-decoration: none; }
.language { display: flex; gap: 5px; margin-left: 8px; }
.language button {
  border: 1px solid var(--line); border-radius: 999px; padding: 7px 10px;
  background: transparent; color: var(--ink); cursor: pointer; font: inherit; font-size: 13px;
}
.language button[aria-pressed="true"] { background: var(--ink); color: var(--lime); border-color: var(--ink); }
.hero { padding: 92px 0 74px; overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: 1.18fr .82fr; gap: 70px; align-items: center; }
.eyebrow { font-size: 13px; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; color: var(--muted); }
h1 { font-size: clamp(48px, 8vw, 88px); line-height: .98; letter-spacing: -.055em; margin: 18px 0 28px; }
.lead { font-size: clamp(19px, 2.4vw, 25px); line-height: 1.48; color: var(--muted); max-width: 690px; }
.chips { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 30px; }
.chip { padding: 8px 13px; border: 1px solid var(--line); border-radius: 999px; background: rgba(255,255,255,.55); font-size: 14px; font-weight: 650; }
.phone {
  position: relative; max-width: 360px; margin: auto; padding: 18px; border-radius: 46px;
  background: var(--ink); box-shadow: var(--shadow); transform: rotate(2deg);
}
.phone::after { content: ""; position: absolute; inset: auto -65px -55px auto; width: 180px; height: 180px; background: var(--lime); border-radius: 50%; z-index: -1; }
.screen { min-height: 570px; border-radius: 31px; padding: 28px 22px; background: var(--card); display: flex; flex-direction: column; }
.screen-head { display: flex; align-items: center; justify-content: space-between; font-size: 14px; font-weight: 750; }
.screen-icon { width: 52px; border-radius: 14px; }
.secret-card { margin: auto 0; padding: 35px 20px; border-radius: 25px; background: var(--ink); color: var(--card); text-align: center; }
.secret-card small { color: #cdd5cf; }
.secret-card strong { display: block; color: var(--lime); font-size: 35px; margin: 21px 0; }
.screen-button { margin-top: 20px; padding: 15px; border-radius: 15px; background: var(--lime); text-align: center; font-weight: 850; }
section { padding: 74px 0; }
.section-title { font-size: clamp(34px, 5vw, 57px); line-height: 1.06; letter-spacing: -.035em; margin: 0 0 18px; }
.section-intro { max-width: 720px; color: var(--muted); margin: 0 0 38px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.feature { min-height: 270px; padding: 30px; border-radius: 24px; background: var(--card); border: 1px solid var(--line); }
.feature:nth-child(2) { background: var(--ink); color: var(--card); }
.feature:nth-child(2) p { color: #cdd5cf; }
.number { display: inline-grid; place-items: center; width: 42px; height: 42px; border-radius: 50%; background: var(--lime); color: var(--ink); font-weight: 900; }
.feature h3 { font-size: 25px; line-height: 1.18; margin: 28px 0 12px; }
.feature p { color: var(--muted); margin: 0; }
.stats { display: grid; grid-template-columns: repeat(4, 1fr); border-block: 1px solid var(--line); }
.stat { padding: 34px 20px; text-align: center; }
.stat strong { display: block; font-size: clamp(30px, 4vw, 48px); letter-spacing: -.04em; }
.stat span { color: var(--muted); font-size: 14px; }
.privacy-callout { display: grid; grid-template-columns: 1fr 1fr; gap: 35px; padding: 40px; border-radius: 30px; background: var(--lime); }
.privacy-callout h2 { margin: 0; font-size: clamp(32px, 5vw, 55px); line-height: 1.06; letter-spacing: -.04em; }
.privacy-callout p { margin: 0; align-self: center; }
.legal { padding: 58px 0 90px; }
.legal article { max-width: 800px; }
.legal h1 { font-size: clamp(40px, 7vw, 64px); }
.legal h2 { font-size: 25px; margin-top: 42px; }
.legal h3 { margin-top: 28px; }
.legal p, .legal li { color: #33483f; }
.notice { padding: 18px 20px; border-left: 5px solid var(--lime); background: var(--card); border-radius: 0 14px 14px 0; }
.support-card { padding: 28px; border: 1px solid var(--line); border-radius: 22px; background: var(--card); margin: 18px 0; }
.button { display: inline-block; margin-top: 12px; padding: 13px 18px; border-radius: 14px; background: var(--ink); color: var(--lime); font-weight: 800; text-decoration: none; }
footer { padding: 38px 0 55px; border-top: 1px solid var(--line); color: var(--muted); }
.footer-grid { display: flex; justify-content: space-between; gap: 25px; align-items: start; }
.footer-links { display: flex; flex-wrap: wrap; gap: 16px; }
.footer-links a { font-size: 14px; }
html [data-copy] { display: none; }
html[data-lang="en"] [data-copy="en"], html[data-lang="zh"] [data-copy="zh"] { display: revert; }

@media (max-width: 800px) {
  .links > a { display: none; }
  .hero { padding-top: 60px; }
  .hero-grid, .privacy-callout { grid-template-columns: 1fr; }
  .phone { margin-top: 20px; }
  .grid-3 { grid-template-columns: 1fr; }
  .feature { min-height: auto; }
  .stats { grid-template-columns: 1fr 1fr; }
  .footer-grid { display: grid; }
}

@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }