:root {
  --bg: #f6f5ef;
  --surface: #ffffff;
  --surface-soft: #fbfaf5;
  --text: #1d2529;
  --muted: #637078;
  --line: #dfe3d8;
  --line-strong: #cbd3c5;
  --green: #1f7a63;
  --green-dark: #155b4a;
  --blue: #2f64c8;
  --amber: #b7791f;
  --rose: #ad3f32;
  --shadow: 0 18px 48px rgba(37, 42, 45, 0.14);
  color-scheme: light;
  font-family: Inter, "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  letter-spacing: 0;
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  min-height: 68px;
  padding: 0 28px;
  border-bottom: 1px solid rgba(223, 227, 216, 0.74);
  background: rgba(246, 245, 239, 0.92);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  min-width: 0;
  gap: 10px;
  font-weight: 800;
}

.brand img {
  width: 36px;
  height: 36px;
  border-radius: 8px;
}

.brand span {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.site-header nav {
  display: flex;
  align-items: center;
  gap: 6px;
}

.site-header nav a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 36px;
  padding: 0 12px;
  border-radius: 8px;
  color: #3d474d;
}

.site-header nav a:hover {
  background: #ffffff;
  color: var(--green-dark);
}

main {
  overflow: hidden;
}

.hero {
  position: relative;
  min-height: calc(100vh - 68px);
  display: grid;
  align-items: center;
  padding: 72px 28px 84px;
  background: #263238;
  isolation: isolate;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(90deg, rgba(18, 25, 28, 0.92) 0%, rgba(18, 25, 28, 0.74) 44%, rgba(18, 25, 28, 0.36) 100%);
}

.hero-media {
  position: absolute;
  inset: 0;
  z-index: -2;
  overflow: hidden;
  display: grid;
  grid-template-columns: minmax(250px, 0.8fr) minmax(300px, 1fr) minmax(250px, 0.8fr);
  align-items: center;
  gap: 22px;
  padding: 60px 6vw 34px 42vw;
}

.hero-shot {
  width: 100%;
  max-height: 82vh;
  object-fit: cover;
  object-position: top center;
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 8px;
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.34);
}

.shot-a {
  align-self: start;
  opacity: 0.64;
}

.shot-b {
  align-self: center;
  opacity: 0.86;
}

.shot-c {
  align-self: end;
  opacity: 0.58;
}

.hero-content {
  width: min(720px, 100%);
  color: #ffffff;
}

.app-icon {
  width: 76px;
  height: 76px;
  margin-bottom: 24px;
  border-radius: 8px;
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.28);
}

.eyebrow,
.section-heading p {
  margin: 0 0 10px;
  color: #a9dccb;
  font-size: 13px;
  font-weight: 800;
}

.hero h1 {
  width: min(650px, 100%);
  margin: 0;
  font-size: 52px;
  line-height: 1.12;
}

.hero-copy {
  width: min(620px, 100%);
  margin: 22px 0 0;
  color: rgba(255, 255, 255, 0.86);
  font-size: 18px;
  line-height: 1.78;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.primary-link,
.secondary-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border-radius: 8px;
  font-weight: 800;
}

.primary-link {
  background: #ffffff;
  color: var(--green-dark);
}

.secondary-link {
  border: 1px solid rgba(255, 255, 255, 0.48);
  color: #ffffff;
}

.info-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  max-width: 1180px;
  margin: -44px auto 0;
  padding: 0 28px;
  position: relative;
  z-index: 2;
}

.info-strip div {
  min-height: 104px;
  padding: 20px;
  border: 1px solid var(--line);
  background: var(--surface);
}

.info-strip div:first-child {
  border-radius: 8px 0 0 8px;
}

.info-strip div:last-child {
  border-radius: 0 8px 8px 0;
}

.info-strip span,
.site-footer span {
  color: var(--muted);
}

.info-strip strong {
  display: block;
  margin-top: 10px;
  font-size: 19px;
  line-height: 1.35;
}

.section,
.showcase,
.agreements {
  max-width: 1180px;
  margin: 0 auto;
  padding: 88px 28px 0;
}

.section-heading h2 {
  width: min(720px, 100%);
  margin: 0;
  font-size: 36px;
  line-height: 1.2;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-top: 30px;
}

.feature-grid article {
  min-height: 230px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.feature-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 8px;
  background: #edf7f2;
  color: var(--green-dark);
  font-weight: 900;
}

.feature-grid h3 {
  margin: 22px 0 10px;
  font-size: 20px;
}

.feature-grid p,
.plain-list li,
.review-note p {
  margin: 0;
  color: var(--muted);
  line-height: 1.78;
}

.screen-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin-top: 30px;
}

.screen-grid figure {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.screen-grid img {
  width: 100%;
  aspect-ratio: 375 / 812;
  object-fit: cover;
  object-position: top center;
  background: #ecefe8;
}

.screen-grid figure:first-child img {
  aspect-ratio: 375 / 812;
}

.screen-grid figcaption {
  padding: 12px 14px;
  border-top: 1px solid var(--line);
  font-weight: 800;
}

.split-section {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(280px, 0.75fr);
  gap: 22px;
  align-items: start;
}

.plain-list {
  display: grid;
  gap: 12px;
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
}

.plain-list li {
  position: relative;
  min-height: 48px;
  padding: 12px 14px 12px 42px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.plain-list li::before {
  content: "";
  position: absolute;
  left: 16px;
  top: 19px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--green);
}

.review-note {
  margin-top: 48px;
  padding: 22px;
  border: 1px solid #e1c990;
  border-radius: 8px;
  background: #fff8e8;
}

.review-note strong {
  display: block;
  color: #7c4f10;
  font-size: 18px;
  margin-bottom: 10px;
}

.agreement-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 12px;
  margin-top: 28px;
}

.agreement-grid a {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 58px;
  padding: 0 14px;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: var(--surface);
  color: var(--green-dark);
  font-weight: 900;
  text-align: center;
}

.agreement-grid a:hover {
  border-color: var(--green);
  background: #f1faf5;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  max-width: 1180px;
  margin: 84px auto 0;
  padding: 24px 28px 36px;
  border-top: 1px solid var(--line);
  font-size: 13px;
}

@media (max-width: 980px) {
  .site-header {
    position: static;
    align-items: flex-start;
    flex-direction: column;
    padding: 14px 18px;
  }

  .site-header nav {
    width: 100%;
    overflow-x: auto;
    padding-bottom: 2px;
  }

  .hero {
    min-height: 760px;
    padding: 56px 20px 64px;
    align-items: end;
  }

  .hero::before {
    background: linear-gradient(180deg, rgba(18, 25, 28, 0.22) 0%, rgba(18, 25, 28, 0.84) 48%, rgba(18, 25, 28, 0.96) 100%);
  }

  .hero-media {
    grid-template-columns: repeat(3, minmax(180px, 1fr));
    align-items: start;
    padding: 28px 20px 300px;
    gap: 12px;
  }

  .shot-a,
  .shot-c {
    opacity: 0.48;
  }

  .hero h1 {
    font-size: 38px;
  }

  .hero-copy {
    font-size: 16px;
  }

  .info-strip,
  .feature-grid,
  .screen-grid,
  .agreement-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .info-strip {
    margin-top: 0;
    padding: 18px;
  }

  .info-strip div,
  .info-strip div:first-child,
  .info-strip div:last-child {
    border-radius: 8px;
  }

  .section,
  .showcase,
  .agreements {
    padding: 64px 18px 0;
  }

  .split-section {
    grid-template-columns: 1fr;
  }

  .review-note {
    margin-top: 4px;
  }
}

@media (max-width: 620px) {
  body {
    font-size: 14px;
  }

  .brand {
    width: 100%;
  }

  .site-header nav a {
    min-width: 64px;
  }

  .hero {
    min-height: 760px;
    padding: 42px 16px 48px;
  }

  .hero-media {
    grid-template-columns: repeat(3, 180px);
    justify-content: center;
    padding: 20px 0 330px;
  }

  .hero-shot {
    max-height: 420px;
  }

  .app-icon {
    width: 60px;
    height: 60px;
    margin-bottom: 18px;
  }

  .hero h1 {
    font-size: 30px;
  }

  .hero-actions {
    display: grid;
    grid-template-columns: 1fr;
  }

  .info-strip,
  .feature-grid,
  .screen-grid,
  .agreement-grid {
    grid-template-columns: 1fr;
  }

  .section-heading h2 {
    font-size: 27px;
  }

  .feature-grid article {
    min-height: 0;
  }

  .site-footer {
    flex-direction: column;
    margin-top: 64px;
    padding: 20px 18px 30px;
  }
}