:root {
  color-scheme: light;
  --surface: #f9f9fc;
  --surface-soft: #eef9f7;
  --surface-card: #ffffff;
  --text: #1a1c1e;
  --muted: #5b6864;
  --muted-2: #7d8b86;
  --line: #dbe8e4;
  --primary: #006b57;
  --mint: #00e5bc;
  --blue: #3356c2;
  --blue-soft: #e8edff;
  --coral: #ffbc97;
  --shadow: 0 28px 70px rgba(28, 70, 61, 0.13);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--surface);
  color: var(--text);
  font-family:
    "Be Vietnam Pro", "Plus Jakarta Sans", Inter, "PingFang SC",
    "Microsoft YaHei", Arial, sans-serif;
  overflow-x: hidden;
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  width: min(1180px, calc(100% - 56px));
  height: 76px;
  margin: 0 auto;
  background: rgba(249, 249, 252, 0.88);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  font-weight: 900;
  letter-spacing: 0;
  color: #073f3b;
}

.brand img {
  width: 42px;
  height: 42px;
  border-radius: 12px;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 34px;
  color: #31423d;
  font-size: 15px;
  font-weight: 600;
}

.site-nav a {
  transition:
    color 180ms ease,
    transform 180ms ease;
}

.site-nav a:hover {
  color: var(--primary);
  transform: translateY(-1px);
}

.header-actions {
  display: inline-flex;
  align-items: center;
  gap: 14px;
}

.language-switch {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  height: 38px;
  padding: 3px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
}

.language-switch button {
  min-width: 42px;
  height: 30px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font: inherit;
  font-size: 13px;
  font-weight: 900;
  line-height: 1;
}

.language-switch button.active {
  background: var(--primary);
  color: #ffffff;
  box-shadow: 0 8px 18px rgba(0, 107, 87, 0.16);
}

.header-cta,
.primary-button,
.secondary-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 24px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 800;
  white-space: nowrap;
}

.header-cta,
.primary-button {
  background: var(--primary);
  color: #ffffff;
  box-shadow: 0 14px 30px rgba(0, 107, 87, 0.18);
}

.secondary-button {
  border: 1px solid var(--line);
  background: #ffffff;
  color: var(--primary);
}

.section-band {
  background:
    linear-gradient(180deg, rgba(232, 244, 248, 0.78), rgba(255, 255, 255, 0)),
    var(--surface);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(520px, 1.08fr);
  align-items: center;
  gap: 54px;
  width: min(1180px, calc(100% - 56px));
  min-height: calc(100vh - 76px);
  margin: 0 auto;
  padding: 56px 0 82px;
  overflow: hidden;
}

.hero-copy {
  padding-bottom: 72px;
}

.hero h1,
.section-heading h2,
.safety h2,
.download h2 {
  margin: 0;
  color: var(--text);
  font-family:
    "Plus Jakarta Sans", "Be Vietnam Pro", "PingFang SC", "Microsoft YaHei",
    Arial, sans-serif;
  font-weight: 800;
  letter-spacing: 0;
}

.hero h1 {
  max-width: 560px;
  font-size: clamp(48px, 5vw, 76px);
  line-height: 1.05;
}

.hero p {
  max-width: 520px;
  margin: 28px 0 0;
  color: var(--muted);
  font-size: 19px;
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  gap: 14px;
  margin-top: 38px;
}

.hero-showcase {
  position: relative;
  min-height: 650px;
}

.phone {
  overflow: hidden;
  border: 10px solid #111816;
  border-radius: 34px;
  background: #111816;
  box-shadow: var(--shadow);
}

.phone img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
}

.phone-primary {
  position: absolute;
  right: 72px;
  top: 0;
  width: 292px;
  height: 608px;
}

.phone-secondary {
  position: absolute;
  left: 24px;
  top: 92px;
  width: 252px;
  height: 530px;
  transform: rotate(-5deg);
}

.activity-photo {
  position: absolute;
  right: 0;
  bottom: 16px;
  width: 280px;
  overflow: hidden;
  border: 8px solid #ffffff;
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.activity-photo img {
  aspect-ratio: 4 / 3;
  width: 100%;
  object-fit: cover;
}

.intro,
.features,
.product,
.safety,
.download,
.site-footer {
  width: min(1180px, calc(100% - 56px));
  margin: 0 auto;
}

.intro {
  padding: 102px 0 92px;
}

.section-heading {
  max-width: 760px;
  margin: 0 auto 46px;
  text-align: center;
}

.section-heading.align-left {
  margin-right: 0;
  margin-left: 0;
  text-align: left;
}

.section-heading h2,
.safety h2,
.download h2 {
  font-size: clamp(34px, 3.3vw, 52px);
  line-height: 1.14;
}

.section-heading p,
.safety-copy p,
.download p {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.8;
}

.intro-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.intro-list article,
.feature-card,
.safety-list article {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface-card);
}

.intro-list article {
  padding: 28px;
}

.intro-list span {
  color: var(--primary);
  font-size: 13px;
  font-weight: 900;
}

.intro-list h3,
.feature-card h3,
.safety-list h3 {
  margin: 18px 0 0;
  font-size: 22px;
  line-height: 1.3;
}

.intro-list p,
.feature-card p,
.safety-list p,
figcaption span {
  color: var(--muted);
  font-size: 15px;
  line-height: 1.75;
}

.features {
  padding: 96px 0;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.feature-card {
  min-height: 214px;
  padding: 26px;
}

.feature-card:nth-child(2) {
  background: var(--blue-soft);
  border-color: #d7e0ff;
}

.feature-card:nth-child(3) {
  background: #fff5ef;
  border-color: #f4d8c7;
}

.product {
  padding: 104px 0 112px;
}

.screen-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: start;
}

.screen-card {
  margin: 0;
}

.screen-card .phone {
  width: 100%;
  height: 560px;
  border-radius: 32px;
}

.screen-card.lift {
  padding-top: 54px;
}

.screen-card.tall .phone {
  height: 610px;
}

figcaption {
  display: grid;
  gap: 8px;
  padding: 20px 4px 0;
}

figcaption strong {
  font-size: 20px;
}

.safety {
  display: grid;
  grid-template-columns: 0.92fr 1.08fr;
  gap: 64px;
  padding: 96px 0;
}

.safety-list {
  display: grid;
  gap: 14px;
}

.safety-list article {
  padding: 24px 26px;
}

.safety-list h3 {
  margin-top: 0;
  font-size: 20px;
}

.download {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 44px;
  align-items: center;
  padding: 96px 0;
}

.download-panel {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 18px;
  min-width: 560px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
  box-shadow: var(--shadow);
}

.download-app {
  display: grid;
  grid-template-columns: 72px 1fr;
  align-items: center;
  gap: 16px;
}

.download-panel img {
  width: 72px;
  height: 72px;
  border-radius: 20px;
}

.download-panel strong,
.download-panel span {
  display: block;
}

.download-panel strong {
  font-size: 22px;
}

.download-panel span {
  margin-top: 4px;
  color: var(--muted);
}

.download-options {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.download-option {
  display: grid;
  gap: 5px;
  min-height: 72px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #f9fefa;
  transition:
    border-color 180ms ease,
    box-shadow 180ms ease,
    transform 180ms ease;
}

.download-option:hover {
  border-color: rgba(0, 107, 87, 0.38);
  box-shadow: 0 12px 26px rgba(0, 107, 87, 0.12);
  transform: translateY(-1px);
}

.download-option.is-disabled {
  cursor: default;
  opacity: 0.66;
}

.download-option.is-disabled:hover {
  border-color: var(--line);
  box-shadow: none;
  transform: none;
}

.download-option span,
.download-option strong {
  display: block;
}

.download-option span {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
}

.download-option strong {
  color: var(--primary);
  font-size: 16px;
}

.download-option.web-entry {
  grid-column: 1 / -1;
  background: var(--primary);
  border-color: var(--primary);
  opacity: 1;
}

.download-option.web-entry span,
.download-option.web-entry strong {
  color: #ffffff;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 36px;
  padding: 36px 0 48px;
  border-top: 1px solid var(--line);
  color: var(--muted);
}

.site-footer strong {
  color: var(--text);
  font-size: 20px;
}

.site-footer p {
  margin: 8px 0 0;
}

.footer-links {
  display: flex;
  gap: 24px;
  font-weight: 700;
}

@media (max-width: 980px) {
  .site-header,
  .hero,
  .intro,
  .features,
  .product,
  .safety,
  .download,
  .site-footer {
    width: min(100% - 32px, 720px);
  }

  .site-nav {
    display: none;
  }

  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
    padding-top: 42px;
  }

  .hero-copy {
    padding-bottom: 0;
  }

  .hero-showcase {
    min-height: 560px;
  }

  .phone-primary {
    right: 44px;
  }

  .phone-secondary {
    left: 0;
  }

  .intro-list,
  .feature-grid,
  .screen-row,
  .safety,
  .download {
    grid-template-columns: 1fr;
  }

  .screen-card.lift {
    padding-top: 0;
  }

  .download-panel {
    grid-template-columns: 1fr;
    min-width: 0;
  }
}

@media (max-width: 640px) {
  .site-header {
    gap: 18px;
  }

  .brand img {
    width: 40px;
    height: 40px;
  }

  .brand {
    font-size: 19px;
  }

  .header-cta {
    display: none;
    min-height: 40px;
    padding: 0 18px;
  }

  .header-actions {
    gap: 0;
  }

  .language-switch {
    height: 36px;
  }

  .language-switch button {
    min-width: 38px;
    height: 28px;
  }

  .hero h1 {
    max-width: 360px;
    font-size: 38px;
    line-height: 1.14;
    word-break: break-all;
  }

  .hero p {
    max-width: 350px;
    font-size: 17px;
  }

  .hero-showcase {
    min-height: 520px;
  }

  .phone-primary {
    right: 0;
    width: 206px;
    height: 470px;
  }

  .phone-secondary {
    top: 120px;
    left: 0;
    width: 184px;
    height: 398px;
  }

  .activity-photo {
    right: 0;
    width: 188px;
  }

  .screen-card .phone,
  .screen-card.tall .phone {
    height: 520px;
  }

  .download-panel {
    grid-template-columns: 1fr;
  }

  .download-app {
    grid-template-columns: 58px 1fr;
  }

  .download-panel img {
    width: 58px;
    height: 58px;
    border-radius: 16px;
  }

  .download-options {
    grid-template-columns: 1fr;
  }

  .download-option.web-entry {
    grid-column: auto;
  }

  .site-footer,
  .footer-links {
    align-items: flex-start;
    flex-direction: column;
  }
}