:root {
  --bg: #050816;
  --panel: rgba(11, 18, 38, 0.72);
  --panel-border: rgba(255, 255, 255, 0.1);
  --text: #f4f7fb;
  --muted: #b7c0d4;
  --primary: #7dff67;
  --primary-2: #34eec6;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.35);
  --radius-xl: 32px;
  --radius-lg: 24px;
  --radius-md: 18px;
  --container: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Inter", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(125, 255, 103, 0.18), transparent 28%),
    radial-gradient(circle at 85% 10%, rgba(52, 238, 198, 0.16), transparent 24%),
    linear-gradient(180deg, #060914 0%, #0a1020 52%, #04070f 100%);
}

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

button,
a {
  font: inherit;
}

button {
  border: none;
  cursor: pointer;
}

.page-shell {
  min-height: 100vh;
}

.site-header {
  width: min(calc(100% - 32px), var(--container));
  margin: 0 auto;
  padding: 22px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--text);
  text-decoration: none;
}

.brand__logo {
  width: 46px;
  height: 46px;
  border-radius: 14px;
}

.brand__name {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.header-download,
.primary-btn,
.secondary-btn,
.ghost-btn {
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, color 0.2s ease;
}

.header-download,
.primary-btn,
.secondary-btn {
  padding: 14px 22px;
  border-radius: 999px;
  font-weight: 700;
}

.header-download,
.primary-btn {
  color: #04110d;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  box-shadow: 0 12px 30px rgba(89, 255, 164, 0.28);
}

.secondary-btn {
  color: var(--text);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.ghost-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 22px;
  border-radius: 999px;
  color: var(--text);
  text-decoration: none;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.header-download:hover,
.primary-btn:hover,
.secondary-btn:hover,
.ghost-btn:hover {
  transform: translateY(-2px);
}

.hero,
.features,
.showcase,
.cta {
  width: min(calc(100% - 32px), var(--container));
  margin: 0 auto;
}

.hero {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  align-items: center;
  gap: 48px;
  padding: 44px 0 80px;
}

.hero__tag,
.section-heading span,
.showcase__text span,
.cta__box span {
  display: inline-flex;
  align-items: center;
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 0.9rem;
  color: #d7ffe1;
  background: rgba(125, 255, 103, 0.12);
  border: 1px solid rgba(125, 255, 103, 0.2);
}

.hero__content h1 {
  margin: 20px 0 18px;
  font-size: clamp(2.6rem, 5vw, 5.2rem);
  line-height: 1.02;
  letter-spacing: -0.04em;
}

.hero__content p,
.showcase__text p,
.cta__box p,
.feature-card p {
  color: var(--muted);
  line-height: 1.8;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 32px;
}

.hero__stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 38px;
}

.hero__stats div,
.feature-card,
.cta__box,
.floating-card {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  box-shadow: var(--shadow);
}

.hero__stats div {
  padding: 22px;
  border-radius: var(--radius-md);
}

.hero__stats strong {
  display: block;
  margin-bottom: 10px;
  font-size: 1.35rem;
}

.hero__stats span {
  color: var(--muted);
  font-size: 0.95rem;
}

.hero__visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 620px;
}

.hero__glow {
  position: absolute;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(125, 255, 103, 0.28) 0%, rgba(52, 238, 198, 0.16) 38%, transparent 72%);
  filter: blur(8px);
}

.hero__main-image {
  position: relative;
  z-index: 1;
  width: min(100%, 380px);
  border-radius: 36px;
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.45);
}

.floating-card {
  position: absolute;
  z-index: 2;
  width: 220px;
  padding: 18px;
  border-radius: 20px;
}

.floating-card span {
  display: block;
  margin-bottom: 8px;
  font-size: 0.9rem;
  color: #d9ffe7;
}

.floating-card strong {
  line-height: 1.5;
}

.floating-card--top {
  top: 70px;
  left: 0;
}

.floating-card--bottom {
  right: 0;
  bottom: 78px;
}

.features {
  padding: 16px 0 40px;
}

.section-heading {
  max-width: 680px;
}

.section-heading h2,
.showcase__text h2,
.cta__box h2 {
  margin: 18px 0 0;
  font-size: clamp(1.9rem, 3.6vw, 3.3rem);
  line-height: 1.14;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  margin-top: 28px;
}

.feature-card {
  padding: 28px;
  border-radius: var(--radius-lg);
}

.feature-card h3 {
  margin: 0 0 14px;
  font-size: 1.2rem;
}

.showcase {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 28px;
  padding: 56px 0;
  align-items: center;
}

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

.showcase__gallery img {
  width: 100%;
  border-radius: 28px;
  box-shadow: var(--shadow);
}

.showcase__text .secondary-btn {
  margin-top: 24px;
}

.cta {
  padding: 8px 0 80px;
}

.cta__box {
  text-align: center;
  padding: 52px 24px;
  border-radius: 36px;
}

.primary-btn--wide {
  min-width: 220px;
  margin-top: 20px;
}

@media (max-width: 1080px) {
  .hero,
  .showcase {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 24px;
  }

  .hero__visual {
    min-height: 560px;
  }

  .showcase__text {
    max-width: 760px;
  }
}

@media (max-width: 768px) {
  .site-header {
    padding-top: 16px;
  }

  .brand__name {
    font-size: 1rem;
  }

  .header-download {
    padding: 12px 18px;
  }

  .hero {
    gap: 26px;
    padding-bottom: 52px;
  }

  .hero__content h1 {
    margin-top: 16px;
  }

  .hero__stats,
  .feature-grid,
  .showcase__gallery {
    grid-template-columns: 1fr;
  }

  .hero__visual {
    min-height: auto;
    padding: 30px 0 10px;
  }

  .hero__main-image {
    width: min(100%, 320px);
  }

  .floating-card {
    width: 180px;
    padding: 14px;
  }

  .floating-card--top {
    top: 8px;
    left: 0;
  }

  .floating-card--bottom {
    right: 0;
    bottom: 18px;
  }

  .feature-card,
  .cta__box {
    padding: 22px;
  }
}

@media (max-width: 520px) {
  .site-header {
    gap: 10px;
  }

  .header-download {
    padding: 10px 14px;
    font-size: 0.92rem;
  }

  .hero__actions {
    flex-direction: column;
  }

  .primary-btn,
  .secondary-btn,
  .ghost-btn,
  .primary-btn--wide {
    width: 100%;
  }

  .floating-card {
    position: static;
    width: 100%;
    margin-top: 14px;
  }

  .hero__visual {
    display: block;
    text-align: center;
  }

  .hero__main-image {
    margin: 0 auto;
  }
}