:root {
  --ink: #172033;
  --muted: #687083;
  --line: #dce0e8;
  --paper: #ffffff;
  --soft: #f6f7fa;
  --pink: #f7528a;
  --yellow: #ffd54a;
  --green: #26a978;
  --blue: #3684f7;
  --shadow: 0 18px 48px rgba(23, 32, 51, 0.12);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Inter, "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  line-height: 1.65;
}
a { color: inherit; }
img { max-width: 100%; }
.wrap { width: min(1120px, calc(100% - 40px)); margin: 0 auto; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(220, 224, 232, 0.8);
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(14px);
}
.nav { min-height: 70px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 11px; text-decoration: none; font-weight: 850; }
.brand-mark {
  width: 38px; height: 38px; display: grid; place-items: center;
  border-radius: 10px; color: white; background: var(--pink);
  box-shadow: 5px 5px 0 var(--yellow); font-size: 21px;
}
.nav-links { display: flex; align-items: center; gap: 26px; }
.nav-links a { color: #4f586d; text-decoration: none; font-size: 14px; font-weight: 700; }
.nav-links a:hover, .nav-links a:focus-visible { color: var(--pink); }
.nav-cta { padding: 9px 16px; border: 1px solid var(--ink); border-radius: 6px; color: var(--ink) !important; }

.hero {
  min-height: min(760px, calc(100vh - 70px));
  display: grid; grid-template-columns: 1fr 0.9fr; align-items: center; gap: 70px;
  padding: 76px 0 88px;
}
.eyebrow { margin: 0 0 14px; color: var(--green); font-size: 13px; font-weight: 900; letter-spacing: 0; text-transform: uppercase; }
h1 { margin: 0; font-size: clamp(48px, 7vw, 82px); line-height: 0.98; letter-spacing: 0; }
.hero-copy { max-width: 610px; margin: 24px 0 30px; color: var(--muted); font-size: 19px; }
.actions { display: flex; flex-wrap: wrap; align-items: center; gap: 13px; }
.button { min-height: 50px; display: inline-flex; align-items: center; justify-content: center; gap: 10px; padding: 0 21px; border: 1px solid var(--ink); border-radius: 6px; text-decoration: none; font-weight: 850; }
.button.primary { color: white; background: var(--ink); box-shadow: 5px 5px 0 var(--yellow); }
.button.secondary { background: white; }
.button:hover { transform: translateY(-2px); }
.hero-note { margin-top: 17px; color: #858ca0; font-size: 13px; }

.studio-visual { position: relative; min-height: 560px; }
.phone {
  position: absolute; inset: 8px 26px auto auto; width: min(340px, 78vw); height: 548px;
  overflow: hidden; border: 8px solid var(--ink); border-radius: 36px; background: #f8f5ff; box-shadow: var(--shadow);
}
.phone-bar { height: 52px; display: flex; align-items: center; justify-content: space-between; padding: 0 20px; background: white; border-bottom: 1px solid var(--line); font-size: 13px; font-weight: 800; }
.phone-canvas { position: relative; height: 388px; overflow: hidden; background: #dff7f0; }
.gridlines { position: absolute; inset: 0; opacity: .45; background-image: linear-gradient(#fff 1px, transparent 1px), linear-gradient(90deg, #fff 1px, transparent 1px); background-size: 32px 32px; }
.sticker { position: absolute; display: grid; place-items: center; filter: drop-shadow(0 8px 8px rgba(23,32,51,.18)); }
.sticker.one { left: 49px; top: 40px; width: 116px; height: 116px; border: 8px solid white; border-radius: 50%; background: var(--yellow); font-size: 60px; transform: rotate(-8deg); }
.sticker.two { right: 35px; top: 176px; width: 118px; height: 86px; border: 7px solid white; border-radius: 38% 62% 48% 52%; background: var(--pink); color: white; font-size: 47px; transform: rotate(9deg); }
.sticker.three { left: 38px; bottom: 34px; padding: 10px 16px; border: 6px solid white; border-radius: 8px; color: white; background: var(--blue); font-weight: 950; transform: rotate(-5deg); }
.phone-tools { height: 100px; display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; padding: 16px; background: white; }
.tool { display: grid; place-items: center; gap: 2px; color: #626a7b; font-size: 10px; }
.tool b { font-size: 22px; line-height: 1; }
.floating-chip { position: absolute; padding: 11px 16px; border: 2px solid var(--ink); border-radius: 7px; background: white; box-shadow: 5px 5px 0 var(--pink); font-size: 14px; font-weight: 900; }
.chip-a { left: 4px; top: 92px; transform: rotate(-7deg); }
.chip-b { right: 0; bottom: 44px; transform: rotate(5deg); box-shadow-color: var(--green); }

.band { padding: 96px 0; }
.band.soft { background: var(--soft); }
.section-head { display: grid; grid-template-columns: .72fr 1fr; gap: 64px; align-items: end; margin-bottom: 46px; }
.section-head h2 { margin: 0; font-size: clamp(34px, 5vw, 54px); line-height: 1.08; letter-spacing: 0; }
.section-head p { margin: 0; color: var(--muted); font-size: 17px; }
.features { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.feature { min-height: 260px; padding: 28px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); background: white; }
.feature-icon { width: 46px; height: 46px; display: grid; place-items: center; margin-bottom: 42px; border-radius: 6px; color: white; background: var(--ink); font-size: 22px; }
.feature:nth-child(2) .feature-icon { background: var(--pink); }
.feature:nth-child(3) .feature-icon { background: var(--green); }
.feature:nth-child(4) .feature-icon { color: var(--ink); background: var(--yellow); }
.feature h3 { margin: 0 0 8px; font-size: 19px; }
.feature p { margin: 0; color: var(--muted); font-size: 14px; }

.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 44px; }
.step { position: relative; padding-top: 22px; border-top: 4px solid var(--ink); }
.step strong { color: var(--pink); font-size: 13px; }
.step h3 { margin: 11px 0 8px; font-size: 23px; }
.step p { margin: 0; color: var(--muted); }
.privacy-callout { display: grid; grid-template-columns: 1fr auto; gap: 34px; align-items: center; padding: 42px; border: 1px solid var(--line); border-left: 8px solid var(--green); }
.privacy-callout h2 { margin: 0 0 8px; font-size: 30px; }
.privacy-callout p { margin: 0; color: var(--muted); }

.site-footer { padding: 38px 0; border-top: 1px solid var(--line); background: var(--ink); color: white; }
.footer-row { display: flex; justify-content: space-between; align-items: center; gap: 28px; }
.footer-links { display: flex; flex-wrap: wrap; gap: 22px; }
.footer-links a { color: #d8deea; font-size: 13px; text-decoration: none; }
.copyright { color: #aeb6c7; font-size: 13px; }

.legal-main { padding: 78px 0 100px; }
.legal-shell { width: min(820px, calc(100% - 40px)); margin: 0 auto; }
.legal-kicker { color: var(--pink); font-size: 13px; font-weight: 900; }
.legal-main h1 { margin: 10px 0 18px; font-size: clamp(42px, 7vw, 68px); }
.legal-meta { margin-bottom: 46px; padding-bottom: 24px; border-bottom: 1px solid var(--line); color: var(--muted); }
.legal-main h2 { margin: 38px 0 10px; font-size: 24px; }
.legal-main p, .legal-main li { color: #535c70; }
.legal-main ul { padding-left: 22px; }
.legal-note { padding: 18px 20px; border-left: 5px solid var(--yellow); background: var(--soft); }

@media (max-width: 860px) {
  .hero { grid-template-columns: 1fr; gap: 34px; padding-top: 54px; }
  .studio-visual { min-height: 520px; }
  .phone { position: relative; margin: 0 auto; inset: auto; }
  .features { grid-template-columns: repeat(2, 1fr); }
  .section-head { grid-template-columns: 1fr; gap: 18px; }
}

@media (max-width: 620px) {
  .wrap { width: min(100% - 28px, 1120px); }
  .nav { min-height: 62px; }
  .brand span:last-child { font-size: 14px; }
  .nav-links a:not(.nav-cta) { display: none; }
  .nav-cta { padding: 7px 10px; font-size: 12px !important; }
  h1 { font-size: 48px; }
  .hero-copy { font-size: 17px; }
  .hero { min-height: auto; gap: 22px; padding-top: 34px; padding-bottom: 42px; }
  .hero-copy { margin: 18px 0 22px; }
  .hero-note { margin-top: 13px; }
  .studio-visual { min-height: 298px; }
  .phone { width: min(250px, calc(100vw - 88px)); height: 292px; border-width: 6px; border-radius: 28px; }
  .phone-bar { height: 38px; padding: 0 14px; font-size: 11px; }
  .phone-canvas { height: 192px; }
  .phone-tools { height: 50px; padding: 8px 10px; }
  .tool { font-size: 8px; }
  .tool b { font-size: 15px; }
  .sticker.one { left: 34px; top: 22px; width: 76px; height: 76px; border-width: 5px; font-size: 39px; }
  .sticker.two { right: 25px; top: 92px; width: 76px; height: 58px; border-width: 5px; font-size: 30px; }
  .sticker.three { left: 27px; bottom: 17px; padding: 5px 9px; border-width: 4px; font-size: 10px; }
  .chip-a { left: 0; top: 48px; padding: 8px 11px; font-size: 11px; }
  .chip-b { right: 0; bottom: 8px; padding: 8px 11px; font-size: 11px; }
  .band { padding: 68px 0; }
  .features, .steps { grid-template-columns: 1fr; }
  .feature { min-height: 220px; }
  .privacy-callout { grid-template-columns: 1fr; padding: 28px 24px; }
  .footer-row { align-items: flex-start; flex-direction: column; }
}