:root {
  color-scheme: light;
  --ink: #17221f;
  --muted: #5e6d68;
  --soft: #eef5f1;
  --surface: #ffffff;
  --line: #dbe6e0;
  --mint: #31a984;
  --mint-dark: #1b735d;
  --coral: #f0644a;
  --gold: #d9a429;
  --shadow: 0 18px 50px rgba(36, 55, 50, 0.12);
}

* {
  box-sizing: border-box;
  letter-spacing: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
  color: var(--ink);
  background: #f8faf8;
  line-height: 1.6;
}

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

a {
  color: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px 40px;
  background: rgba(255, 255, 255, 0.92);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  text-decoration: none;
  white-space: nowrap;
}

.brand-mark img {
  border-radius: 8px;
  box-shadow: 0 6px 18px rgba(49, 169, 132, 0.18);
}

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

.top-nav a {
  padding: 8px 12px;
  color: var(--muted);
  font-size: 14px;
  text-decoration: none;
  border-radius: 6px;
}

.top-nav a:hover {
  color: var(--ink);
  background: var(--soft);
}

.hero-section {
  min-height: calc(100vh - 66px);
  display: flex;
  align-items: center;
  padding: 56px 40px 44px;
  background:
    linear-gradient(135deg, rgba(49, 169, 132, 0.12), rgba(240, 100, 74, 0.10) 58%, rgba(217, 164, 41, 0.12)),
    #f6fbf8;
}

.hero-inner {
  width: min(1180px, 100%);
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1.04fr) minmax(320px, 0.7fr);
  gap: 56px;
  align-items: center;
}

.source-line,
.section-kicker {
  margin: 0 0 12px;
  color: var(--mint-dark);
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
}

.app-heading {
  display: flex;
  align-items: center;
  gap: 22px;
  margin-bottom: 28px;
}

.app-icon {
  flex: 0 0 auto;
  border-radius: 8px;
  box-shadow: var(--shadow);
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1 {
  margin: 0;
  font-size: 56px;
  line-height: 1.05;
}

.developer {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 17px;
}

.lead {
  max-width: 700px;
  margin: 0;
  color: #293d38;
  font-size: 22px;
  line-height: 1.55;
}

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

.button,
.status-badge {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 18px;
  border-radius: 6px;
  font-size: 15px;
  font-weight: 800;
  text-decoration: none;
}

.button.primary {
  color: #fff;
  background: var(--mint-dark);
}

.button.primary:hover {
  background: #155e4c;
}

.button.harmony {
  color: #fff;
  background: var(--coral);
}

.button.harmony:hover {
  background: #d74e35;
}

.button.secondary {
  color: var(--mint-dark);
  background: #fff;
  border: 1px solid var(--line);
}

.button.secondary:hover {
  border-color: rgba(27, 115, 93, 0.42);
}

.status-badge {
  color: #8b3b2c;
  background: #fff0ec;
  border: 1px solid #f6c8bd;
}

.hero-media {
  display: grid;
  grid-template-columns: auto 92px;
  gap: 18px;
  align-items: center;
  justify-content: center;
}

.phone-frame {
  width: 282px;
  padding: 14px;
  background: #101817;
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.phone-frame img {
  width: 100%;
  aspect-ratio: 225 / 400;
  object-fit: cover;
  border-radius: 4px;
}

.mini-strip {
  display: grid;
  gap: 14px;
}

.mini-strip img {
  width: 82px;
  aspect-ratio: 225 / 400;
  object-fit: cover;
  border-radius: 6px;
  border: 4px solid #fff;
  box-shadow: 0 12px 28px rgba(23, 34, 31, 0.14);
}

.section {
  width: min(1180px, calc(100% - 80px));
  margin: 0 auto;
  padding: 80px 0;
}

.section + .section {
  border-top: 1px solid var(--line);
}

.section-heading {
  max-width: 760px;
  margin-bottom: 30px;
}

h2 {
  margin: 0;
  font-size: 36px;
  line-height: 1.18;
}

h3 {
  margin: 0 0 8px;
  font-size: 18px;
  line-height: 1.35;
}

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

.feature-grid article,
.capability-list div {
  min-height: 152px;
  padding: 22px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.feature-grid article:nth-child(3n + 1) {
  border-top: 4px solid var(--mint);
}

.feature-grid article:nth-child(3n + 2) {
  border-top: 4px solid var(--coral);
}

.feature-grid article:nth-child(3n) {
  border-top: 4px solid var(--gold);
}

.feature-grid p,
.capability-list p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
}

.capability-list {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 12px;
}

.capability-list div {
  min-height: 188px;
}

.gallery {
  display: grid;
  grid-template-columns: repeat(5, minmax(160px, 1fr));
  gap: 18px;
  align-items: start;
}

.shot {
  display: block;
  width: 100%;
  padding: 10px;
  cursor: pointer;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 12px 30px rgba(23, 34, 31, 0.08);
}

.shot:hover,
.shot:focus-visible,
.shot.is-active {
  outline: none;
  border-color: var(--mint);
  box-shadow: 0 12px 32px rgba(49, 169, 132, 0.20);
}

.shot img {
  width: 100%;
  aspect-ratio: 225 / 400;
  object-fit: cover;
  border-radius: 4px;
}

.description-copy {
  columns: 2;
  column-gap: 48px;
  color: #2a3e38;
  font-size: 17px;
}

.description-copy p {
  margin: 0 0 18px;
  break-inside: avoid;
}

.release-note {
  display: inline-block;
  min-width: 320px;
  padding: 26px 30px;
  background: #fff;
  border: 1px solid var(--line);
  border-left: 6px solid var(--coral);
  border-radius: 8px;
}

.release-note p {
  margin: 0;
  font-size: 18px;
}

.release-note .version {
  margin-bottom: 8px;
  font-weight: 900;
}

.site-footer {
  padding: 30px 40px 48px;
  color: var(--muted);
  text-align: center;
  border-top: 1px solid var(--line);
}

.site-footer p {
  margin: 0;
}

.site-footer a {
  color: var(--mint-dark);
  font-weight: 800;
}

@media (max-width: 980px) {
  .hero-section {
    min-height: auto;
  }

  .hero-inner {
    grid-template-columns: 1fr;
    gap: 42px;
  }

  .hero-media {
    justify-content: start;
  }

  h1 {
    font-size: 44px;
  }

  .lead {
    font-size: 19px;
  }

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

  .capability-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .gallery {
    grid-template-columns: repeat(3, minmax(150px, 1fr));
  }

  .description-copy {
    columns: 1;
  }
}

@media (max-width: 720px) {
  .site-header {
    position: static;
    padding: 12px 18px;
  }

  .top-nav {
    display: none;
  }

  .hero-section {
    padding: 36px 20px 28px;
  }

  .app-heading {
    align-items: flex-start;
    gap: 16px;
  }

  .app-icon {
    width: 82px;
    height: 82px;
  }

  h1 {
    font-size: 34px;
  }

  h2 {
    font-size: 28px;
  }

  .developer,
  .lead,
  .description-copy {
    font-size: 16px;
  }

  .hero-actions {
    align-items: stretch;
  }

  .button,
  .status-badge {
    width: 100%;
    justify-content: center;
  }

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

  .phone-frame {
    width: min(282px, 100%);
  }

  .mini-strip {
    grid-template-columns: repeat(2, 82px);
  }

  .section {
    width: calc(100% - 40px);
    padding: 56px 0;
  }

  .feature-grid,
  .capability-list,
  .gallery {
    grid-template-columns: 1fr;
  }

  .release-note {
    min-width: 0;
    width: 100%;
  }
}