:root {
  --lime: #b8ff55;
  --lime-deep: #68b100;
  --ink: #111315;
  --muted: #61676d;
  --paper: #f7f8f8;
  --line: #dfe3e1;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: Inter, "SF Pro Display", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.6;
}
a { color: inherit; text-decoration: none; }
button { font: inherit; }
img { display: block; max-width: 100%; }

.site-header {
  position: sticky;
  top: 18px;
  z-index: 20;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  width: min(1180px, calc(100% - 40px));
  min-height: 76px;
  margin: 18px auto 0;
  padding: 0 18px;
  border: 1px solid rgba(17, 19, 21, .08);
  border-radius: 22px;
  background: rgba(255, 255, 255, .84);
  box-shadow: 0 18px 50px rgba(17, 19, 21, .07);
  -webkit-backdrop-filter: blur(18px) saturate(150%);
  backdrop-filter: blur(18px) saturate(150%);
}
.brand { display: inline-flex; align-items: center; gap: 11px; font-weight: 800; }
.brand img { width: 42px; height: 42px; border-radius: 13px; }
.nav { display: flex; gap: 28px; color: #42474b; }
.nav a { font-weight: 650; }
.language-switch {
  justify-self: end;
  display: inline-flex;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #f0f2f1;
}
.lang-button {
  min-width: 42px;
  height: 34px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: #686e72;
  cursor: pointer;
  font-weight: 750;
}
.lang-button.active { background: var(--ink); color: white; }

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.04fr) minmax(380px, .96fr);
  gap: 64px;
  align-items: center;
  width: min(1180px, calc(100% - 40px));
  min-height: calc(100vh - 112px);
  margin: 0 auto;
  padding: 68px 0 92px;
}
.eyebrow, .kicker {
  display: inline-flex;
  margin: 0 0 22px;
  font-size: .78rem;
  font-weight: 850;
  letter-spacing: .12em;
}
.eyebrow {
  padding: 8px 13px;
  border: 1px solid #c9d3c3;
  border-radius: 999px;
  background: rgba(184, 255, 85, .2);
}
h1, h2, h3, p { overflow-wrap: anywhere; }
h1 {
  max-width: 720px;
  margin: 0;
  font-size: clamp(3rem, 5.2vw, 5.6rem);
  line-height: 1.02;
  letter-spacing: -.06em;
}
h1 span { color: var(--lime-deep); }
.hero-lead {
  max-width: 650px;
  margin: 32px 0 0;
  color: var(--muted);
  font-size: clamp(1.1rem, 1.7vw, 1.35rem);
}
.hero-actions { display: flex; align-items: center; gap: 22px; margin-top: 38px; }
.primary-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 56px;
  padding: 0 26px;
  border-radius: 16px;
  background: var(--ink);
  color: white;
  font-weight: 800;
  box-shadow: 0 12px 30px rgba(17, 19, 21, .16);
  transition: transform .2s ease, box-shadow .2s ease;
}
.primary-button:hover { transform: translateY(-2px); box-shadow: 0 16px 36px rgba(17, 19, 21, .2); }
.platform-note { max-width: 220px; color: #737a7e; font-size: .92rem; line-height: 1.45; }
.hero-visual {
  position: relative;
  min-height: 690px;
  display: grid;
  place-items: center;
  overflow: hidden;
}
.hero-visual::before {
  content: "";
  position: absolute;
  inset: 42px 0 54px 60px;
  border-radius: 56px;
  background: var(--lime);
  transform: rotate(5deg);
}
.phone-glow {
  position: absolute;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: rgba(255, 255, 255, .9);
  filter: blur(70px);
}
.phone-shot {
  position: relative;
  z-index: 2;
  width: min(390px, 78%);
  border: 10px solid var(--ink);
  border-radius: 54px;
  box-shadow: 0 42px 80px rgba(18, 30, 12, .25);
}
.ability-card {
  position: absolute;
  z-index: 3;
  right: 4px;
  bottom: 82px;
  max-width: 215px;
  padding: 17px 18px;
  border: 1px solid rgba(255, 255, 255, .8);
  border-radius: 20px;
  background: rgba(255, 255, 255, .92);
  box-shadow: 0 18px 45px rgba(17, 19, 21, .15);
  backdrop-filter: blur(15px);
}
.ability-card span { display: block; color: #69706d; font-size: .78rem; }
.ability-card strong { display: block; margin-top: 3px; font-size: 1rem; }

.proof-strip {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 38px;
  align-items: center;
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  padding: 24px 30px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: white;
}
.proof-strip p { margin: 0; color: var(--muted); font-size: .9rem; }
.proof-items { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.proof-items span { border-left: 2px solid var(--lime); padding-left: 14px; font-weight: 800; }

.section { width: min(1180px, calc(100% - 40px)); margin: 0 auto; padding: 140px 0; }
.section-heading { display: grid; grid-template-columns: 1fr minmax(300px, .48fr); gap: 40px; align-items: end; margin-bottom: 58px; }
.section-heading .kicker { grid-column: 1 / -1; margin-bottom: -16px; color: var(--lime-deep); }
h2 { margin: 0; font-size: clamp(2.2rem, 4vw, 4rem); line-height: 1.08; letter-spacing: -.05em; }
.section-heading > p:last-child { margin: 0; color: var(--muted); font-size: 1.08rem; }

.showcase { padding-bottom: 72px; }
.screen-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 22px; }
.screen-card {
  display: grid;
  grid-template-columns: minmax(0, .8fr) minmax(220px, 1fr);
  gap: 20px;
  min-height: 560px;
  padding: 32px 30px 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 32px;
  background: #ecefee;
}
.screen-card-main { grid-row: span 2; min-height: 840px; grid-template-columns: 1fr; }
.screen-copy span { color: var(--lime-deep); font-weight: 900; }
.screen-copy h3 { margin: 12px 0 10px; font-size: clamp(1.45rem, 2.4vw, 2.4rem); line-height: 1.12; letter-spacing: -.04em; }
.screen-copy p { margin: 0; color: var(--muted); }
.screen-card img {
  align-self: end;
  width: 100%;
  max-width: 360px;
  margin: 30px auto -76px;
  border: 8px solid var(--ink);
  border-radius: 44px;
  box-shadow: 0 26px 60px rgba(17, 19, 21, .18);
}
.screen-card-main img { max-width: 410px; margin-bottom: -55px; }

.features { padding-bottom: 90px; }
.section-heading.compact { grid-template-columns: 1fr; max-width: 880px; }
.feature-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.feature {
  min-height: 340px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 28px;
  background: white;
}
.feature-lime { background: var(--lime); border-color: var(--lime); }
.feature-dark { background: var(--ink); color: white; border-color: var(--ink); }
.feature-icon {
  display: grid;
  place-items: center;
  width: 54px;
  height: 54px;
  margin-bottom: 92px;
  border-radius: 16px;
  background: var(--paper);
  color: var(--ink);
  font-weight: 900;
}
.feature-lime .feature-icon { background: rgba(255,255,255,.7); }
.feature h3 { margin: 0 0 10px; font-size: 1.55rem; letter-spacing: -.03em; }
.feature p { margin: 0; color: var(--muted); }
.feature-dark p { color: #c2c7c5; }

.workflow {
  display: grid;
  grid-template-columns: .82fr 1.18fr;
  gap: 90px;
  align-items: start;
}
.workflow-intro { position: sticky; top: 128px; }
.workflow-intro .kicker { color: var(--lime-deep); }
.workflow-intro h2 { font-size: clamp(2.25rem, 3.7vw, 3.75rem); }
.workflow-intro > p:last-child { max-width: 530px; color: var(--muted); font-size: 1.05rem; }
.steps { margin: 0; padding: 0; list-style: none; }
.steps li { display: grid; grid-template-columns: 74px 1fr; gap: 18px; padding: 34px 0; border-top: 1px solid #cfd4d1; }
.steps li:last-child { border-bottom: 1px solid #cfd4d1; }
.steps > li > span { display: grid; place-items: center; width: 52px; height: 52px; border-radius: 50%; background: var(--lime); font-weight: 900; }
.steps h3 { margin: 0 0 5px; font-size: 1.55rem; }
.steps p { margin: 0; color: var(--muted); }

.closing {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: min(1180px, calc(100% - 40px));
  margin-bottom: 40px;
  padding: 92px 32px;
  overflow: hidden;
  border-radius: 40px;
  background: var(--ink);
  color: white;
  text-align: center;
}
.closing::before { content: ""; position: absolute; }
.closing > img { width: 82px; height: 82px; margin-bottom: 24px; border-radius: 24px; }
.closing .kicker { color: var(--lime); }
.closing h2 { max-width: 920px; }
.closing .light-button { margin-top: 38px; background: var(--lime); color: var(--ink); }
footer {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  padding: 28px 0 45px;
  color: var(--muted);
  font-size: .9rem;
}
footer p { margin: 0; }
footer .brand { color: var(--ink); }
footer .brand img { width: 34px; height: 34px; border-radius: 10px; }
.footer-meta { justify-self: end; text-align: right; }
.footer-company { margin-top: 3px; color: #7b8286; font-size: .82rem; }

@media (max-width: 980px) {
  .nav { gap: 18px; font-size: .9rem; }
  .screen-grid { grid-template-columns: 1fr; }
  .screen-card-main { grid-row: auto; min-height: 700px; }
  .screen-card { grid-template-columns: .8fr 1fr; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .feature { min-height: 300px; }
  .feature-icon { margin-bottom: 56px; }
}

@media (max-width: 760px) {
  .site-header { top: 10px; grid-template-columns: 1fr auto; width: calc(100% - 24px); min-height: 70px; margin-top: 10px; }
  .nav { display: none; }
  .brand span { max-width: 160px; line-height: 1.15; }
  .hero { grid-template-columns: 1fr; gap: 20px; width: min(100% - 32px, 560px); min-height: 0; padding: 74px 0 86px; }
  h1 { font-size: clamp(2.75rem, 12vw, 4.25rem); line-height: 1.06; }
  .hero-actions { align-items: flex-start; flex-direction: column; }
  .hero-visual { min-height: 650px; }
  .hero-visual::before { inset: 42px 0 54px 26px; border-radius: 42px; }
  .phone-shot { width: min(360px, 79%); }
  .ability-card { right: 0; }
  .proof-strip { grid-template-columns: 1fr; gap: 16px; width: calc(100% - 32px); }
  .proof-items { grid-template-columns: repeat(2, 1fr); gap: 18px 8px; }
  .section { width: calc(100% - 32px); padding: 100px 0; }
  .section-heading { grid-template-columns: 1fr; gap: 22px; }
  .section-heading .kicker { margin-bottom: -4px; }
  h2 { font-size: clamp(2.15rem, 9vw, 3.35rem); line-height: 1.1; }
  .workflow-intro h2 { font-size: clamp(2.15rem, 8.6vw, 3.2rem); }
  .screen-card, .screen-card-main { grid-template-columns: 1fr; min-height: 690px; padding: 28px 24px 0; }
  .screen-card img, .screen-card-main img { max-width: 330px; margin-bottom: -60px; }
  .feature-grid { grid-template-columns: 1fr; }
  .feature { min-height: 280px; }
  .workflow { grid-template-columns: 1fr; gap: 48px; }
  .workflow-intro { position: static; }
  .closing { width: calc(100% - 24px); padding: 70px 20px; border-radius: 30px; }
  footer { grid-template-columns: 1fr; gap: 14px; text-align: center; }
  footer .brand, .footer-meta { justify-self: center; }
  .footer-meta { text-align: center; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .primary-button { transition: none; }
}