:root {
  --bg: #eef7f0;
  --ink: #17211d;
  --muted: #5e7169;
  --panel: rgba(255, 255, 255, 0.74);
  --line: rgba(23, 33, 29, 0.12);
  --green: #13b889;
  --blue: #1772e8;
  --dark: #0c1411;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: "PingFang SC", "Hiragino Sans GB", "Noto Sans CJK SC", sans-serif;
  background:
    linear-gradient(120deg, rgba(19, 184, 137, 0.14), transparent 34%),
    linear-gradient(250deg, rgba(23, 114, 232, 0.12), transparent 28%),
    var(--bg);
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px clamp(20px, 5vw, 72px);
  border-bottom: 1px solid var(--line);
  background: rgba(238, 247, 240, 0.86);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
}

.brand-mark {
  display: grid;
  width: 30px;
  height: 30px;
  place-items: center;
  color: white;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--green), var(--blue));
}

nav {
  display: flex;
  gap: 24px;
  color: var(--muted);
  font-size: 14px;
}

main {
  overflow: hidden;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(320px, 0.8fr);
  gap: 44px;
  align-items: end;
  min-height: 78vh;
  padding: 92px clamp(20px, 5vw, 72px) 70px;
  border-bottom: 1px solid var(--line);
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--green);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 980px;
  margin-bottom: 24px;
  font-family: "Songti SC", "STSong", serif;
  font-size: clamp(46px, 7vw, 96px);
  line-height: 0.98;
  letter-spacing: 0;
}

.lead {
  max-width: 780px;
  color: var(--muted);
  font-size: 20px;
  line-height: 1.85;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-weight: 700;
}

.button.primary {
  color: white;
  border-color: transparent;
  background: linear-gradient(135deg, var(--green), var(--blue));
}

.button.ghost {
  background: rgba(255, 255, 255, 0.48);
}

.hero-panel {
  display: grid;
  gap: 12px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: 0 26px 70px rgba(10, 46, 36, 0.12);
}

.hero-shot {
  margin: 0 0 8px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #f7fbf8;
}

.hero-shot img {
  display: block;
  width: 100%;
  aspect-ratio: 1895 / 709;
  object-fit: cover;
  object-position: top center;
}

.metric {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
  padding: 18px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.72);
}

.metric span {
  color: var(--muted);
}

.metric strong {
  text-align: right;
}

.section {
  padding: 78px clamp(20px, 5vw, 72px);
}

.section-heading {
  max-width: 760px;
  margin-bottom: 34px;
}

.section-heading h2,
.notice h2 {
  margin-bottom: 12px;
  font-family: "Songti SC", "STSong", serif;
  font-size: clamp(32px, 4vw, 54px);
  letter-spacing: 0;
}

.section-heading p,
.notice p {
  color: var(--muted);
  font-size: 18px;
  line-height: 1.8;
}

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

.feature-grid article,
.price-card,
.video-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

.feature-grid article {
  min-height: 240px;
  padding: 24px;
}

.index {
  color: var(--green);
  font-weight: 900;
}

.feature-grid h3,
.video-card h3 {
  margin: 18px 0 10px;
  font-size: 22px;
}

.feature-grid p,
.video-card p,
.price-card p,
li {
  color: var(--muted);
  line-height: 1.7;
}

.screenshot-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.55fr 0.55fr;
  gap: 16px;
  align-items: stretch;
}

.screenshot-card {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: 0 22px 56px rgba(10, 46, 36, 0.1);
}

.screenshot-card.wide {
  grid-column: span 2;
}

.screenshot-card img {
  display: block;
  width: 100%;
  height: 280px;
  object-fit: cover;
  object-position: top center;
  background: rgba(255, 255, 255, 0.62);
}

.screenshot-card.phone img {
  height: 280px;
  object-fit: contain;
  padding: 12px;
}

figcaption {
  padding: 13px 16px 15px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
}

.video-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.video-card {
  overflow: hidden;
}

.video-card.wide {
  grid-column: 1 / -1;
}

video {
  display: block;
  width: 100%;
  max-height: 620px;
  background: var(--dark);
}

.video-card div {
  padding: 20px 22px 24px;
}

.pricing-section {
  background: rgba(12, 20, 17, 0.94);
  color: white;
}

.pricing-section .section-heading p,
.pricing-section .eyebrow {
  color: rgba(255, 255, 255, 0.68);
}

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

.price-card {
  padding: 28px;
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.14);
}

.price-card.featured {
  border-color: rgba(19, 184, 137, 0.8);
  box-shadow: 0 22px 70px rgba(19, 184, 137, 0.15);
}

.plan {
  color: rgba(255, 255, 255, 0.66);
  font-weight: 800;
}

.price-card h3 {
  margin: 10px 0 14px;
  font-size: 58px;
}

ul {
  padding-left: 20px;
}

.contact-section {
  background: rgba(255, 255, 255, 0.42);
}

.contact-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  max-width: 720px;
  padding: 24px 28px;
  border: 1px solid rgba(19, 184, 137, 0.36);
  border-radius: 8px;
  background: linear-gradient(135deg, rgba(19, 184, 137, 0.12), rgba(23, 114, 232, 0.1));
  box-shadow: 0 22px 56px rgba(10, 46, 36, 0.1);
}

.contact-card span {
  color: var(--muted);
  font-weight: 800;
}

.contact-card strong {
  color: var(--ink);
  font-size: clamp(28px, 5vw, 46px);
  letter-spacing: 0;
}

.notice {
  margin: 72px clamp(20px, 5vw, 72px);
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.66);
}

footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 28px clamp(20px, 5vw, 72px);
  color: var(--muted);
  border-top: 1px solid var(--line);
}

@media (max-width: 900px) {
  nav {
    display: none;
  }

  .hero,
  .feature-grid,
  .screenshot-grid,
  .video-grid,
  .pricing-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding-top: 62px;
  }

  .video-card.wide {
    grid-column: auto;
  }

  .screenshot-card.wide {
    grid-column: auto;
  }

  .screenshot-card img,
  .screenshot-card.phone img {
    height: auto;
    max-height: 440px;
  }

  footer {
    flex-direction: column;
  }

  .contact-card {
    align-items: flex-start;
    flex-direction: column;
  }
}