* {
  box-sizing: border-box;
}

:root {
  --bg: #0f1624;
  --bg-2: #151d2d;
  --panel: rgba(25, 34, 52, 0.82);
  --panel-2: rgba(34, 45, 68, 0.78);
  --card: rgba(255, 255, 255, 0.08);
  --line: rgba(149, 169, 214, 0.22);
  --text: #eef4ff;
  --muted: #9ba8bf;
  --soft: #c6d2ea;
  --blue: #5f7cff;
  --blue-2: #7bb7ff;
  --green: #65d6b1;
  --gold: #f2c36b;
  --shadow: 0 28px 80px rgba(0, 0, 0, 0.38);
  --radius: 28px;
  --max: 1180px;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", Arial, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 18% 0%, rgba(95, 124, 255, 0.28), transparent 360px),
    radial-gradient(circle at 84% 8%, rgba(101, 214, 177, 0.15), transparent 360px),
    linear-gradient(180deg, #0c111d 0%, #111827 46%, #0e1421 100%);
  line-height: 1.65;
}

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

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

.site-shell {
  position: relative;
  overflow: hidden;
}

.site-shell::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: linear-gradient(180deg, rgba(0,0,0,.8), transparent 78%);
  pointer-events: none;
}

.nav {
  width: min(calc(100% - 36px), var(--max));
  margin: 18px auto 0;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: rgba(17, 25, 39, 0.78);
  backdrop-filter: blur(18px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  position: sticky;
  top: 14px;
  z-index: 20;
  box-shadow: 0 18px 50px rgba(0,0,0,.22);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 210px;
}

.brand-mark {
  width: 42px;
  height: 42px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, #5f7cff, #82ccff);
  color: #fff;
  font-weight: 900;
  letter-spacing: .5px;
  box-shadow: 0 16px 30px rgba(95, 124, 255, .32);
}

.brand strong {
  display: block;
  font-size: 17px;
  line-height: 1.1;
}

.brand em {
  display: block;
  color: var(--muted);
  font-style: normal;
  font-size: 12px;
  margin-top: 2px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--soft);
  font-weight: 700;
  font-size: 14px;
}

.nav-links a {
  padding: 9px 12px;
  border-radius: 999px;
}

.nav-links a:hover {
  background: rgba(95, 124, 255, .14);
  color: #fff;
}

.nav-download,
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 16px;
  font-weight: 900;
  transition: .22s ease;
  white-space: nowrap;
}

.nav-download {
  padding: 10px 14px;
  background: linear-gradient(135deg, var(--blue), #78a9ff);
  box-shadow: 0 12px 28px rgba(95,124,255,.28);
}

.nav-download:hover,
.btn:hover {
  transform: translateY(-2px);
}

.section {
  width: min(calc(100% - 36px), var(--max));
  margin: 0 auto;
  padding: 72px 0;
}

.hero {
  display: grid;
  grid-template-columns: .88fr 1.12fr;
  gap: 42px;
  align-items: center;
  min-height: calc(100vh - 96px);
  padding-top: 58px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 9px 13px;
  border: 1px solid rgba(95, 124, 255, .28);
  border-radius: 999px;
  background: rgba(95, 124, 255, .10);
  color: #cdd8ff;
  font-weight: 800;
  font-size: 14px;
}

.dot {
  width: 9px;
  height: 9px;
  border-radius: 999px;
  background: var(--green);
  box-shadow: 0 0 0 6px rgba(101,214,177,.14);
}

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

h1 {
  margin: 22px 0 18px;
  font-size: clamp(42px, 5.6vw, 72px);
  line-height: 1.05;
  letter-spacing: -2.6px;
  font-weight: 1000;
}

.lead {
  color: var(--soft);
  font-size: 18px;
  max-width: 660px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 30px 0 18px;
}

.btn {
  min-height: 52px;
  padding: 13px 20px;
  border: 1px solid var(--line);
  color: #fff;
}

.btn.primary {
  border: 0;
  background: linear-gradient(135deg, #5f7cff 0%, #73aaff 100%);
  box-shadow: 0 20px 40px rgba(95,124,255,.28);
}

.btn.secondary {
  background: rgba(255,255,255,.08);
}

.btn.full {
  width: 100%;
}

.download-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  color: var(--muted);
  font-size: 13px;
}

.download-meta span {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 7px 10px;
  background: rgba(255,255,255,.05);
}

.hero-visual {
  position: relative;
}

.hero-visual::before {
  content: "";
  position: absolute;
  inset: 8% -6% -8% 8%;
  border-radius: 36px;
  background: linear-gradient(135deg, rgba(95,124,255,.36), rgba(101,214,177,.16));
  filter: blur(36px);
}

.window-frame {
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(149, 169, 214, 0.28);
  border-radius: 30px;
  background: rgba(17, 25, 39, .86);
  box-shadow: var(--shadow);
}

.window-bar {
  height: 46px;
  padding: 0 16px;
  display: flex;
  align-items: center;
  gap: 8px;
  border-bottom: 1px solid var(--line);
  background: rgba(255,255,255,.045);
  color: var(--muted);
  font-size: 13px;
}

.window-bar span {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: rgba(255,255,255,.22);
}

.window-bar strong {
  margin-left: 8px;
  font-weight: 800;
}

.window-frame img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  object-position: center;
}

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

.stat-card {
  border: 1px solid var(--line);
  border-radius: 24px;
  padding: 22px;
  background: rgba(255,255,255,.07);
  box-shadow: 0 16px 42px rgba(0,0,0,.18);
}

.stat-card b {
  display: block;
  font-size: 32px;
  line-height: 1.1;
  margin-bottom: 6px;
}

.stat-card span {
  color: var(--muted);
  font-weight: 700;
}

.section-head {
  max-width: 760px;
  margin-bottom: 28px;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: #b9c7ff;
  font-size: 13px;
  font-weight: 900;
  letter-spacing: .12em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.section-tag::before {
  content: "";
  width: 6px;
  height: 24px;
  border-radius: 999px;
  background: linear-gradient(180deg, var(--blue-2), var(--blue));
  box-shadow: 0 0 22px rgba(95,124,255,.42);
}

.section-tag.light {
  color: #eff6ff;
}

h2 {
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.14;
  letter-spacing: -1.6px;
  margin-bottom: 12px;
}

.section-head p,
.panel-copy p,
.download-card p {
  color: var(--soft);
  font-size: 17px;
}

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

.feature-card {
  border: 1px solid var(--line);
  border-radius: 26px;
  padding: 24px;
  background:
    linear-gradient(180deg, rgba(255,255,255,.085), rgba(255,255,255,.045)),
    rgba(18, 26, 41, .72);
  box-shadow: 0 18px 45px rgba(0,0,0,.18);
  min-height: 230px;
}

.icon {
  width: 56px;
  height: 56px;
  border-radius: 18px;
  display: grid;
  place-items: center;
  color: #fff;
  background: linear-gradient(135deg, var(--blue), var(--blue-2));
  box-shadow: 0 14px 30px rgba(95,124,255,.3);
  font-size: 24px;
  font-weight: 900;
  margin-bottom: 18px;
}

.feature-card h3,
.screen-card h3 {
  font-size: 22px;
  margin-bottom: 8px;
}

.feature-card p,
.screen-card p {
  color: var(--muted);
  margin-bottom: 0;
  font-weight: 650;
}

.split-section {
  display: grid;
  grid-template-columns: .82fr 1.18fr;
  gap: 36px;
  align-items: center;
}

.panel-copy {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 32px;
  background: rgba(255,255,255,.07);
}

.nice-list {
  list-style: none;
  padding: 0;
  margin: 24px 0 0;
  display: grid;
  gap: 12px;
}

.nice-list li {
  color: var(--soft);
  position: relative;
  padding-left: 28px;
  font-weight: 750;
}

.nice-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--green);
  font-weight: 1000;
}

.stacked-shots {
  position: relative;
  min-height: 440px;
}

.stacked-shots img {
  border: 1px solid rgba(149,169,214,.30);
  border-radius: 24px;
  box-shadow: var(--shadow);
  object-fit: cover;
}

.shot-main {
  width: 86%;
  aspect-ratio: 16/10;
  object-position: center;
}

.shot-float {
  position: absolute;
  right: 0;
  bottom: 0;
  width: 58%;
  aspect-ratio: 16/10;
  object-position: center;
}

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

.screen-card {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 28px;
  background: rgba(255,255,255,.07);
  box-shadow: 0 18px 48px rgba(0,0,0,.2);
}

.screen-card.large {
  grid-column: 1 / -1;
}

.screen-card img {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
  object-position: center top;
  border-bottom: 1px solid var(--line);
}

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

.download-section {
  padding-bottom: 42px;
}

.download-card {
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 26px;
  align-items: center;
  padding: 34px;
  border: 1px solid rgba(149,169,214,.32);
  border-radius: 34px;
  background:
    radial-gradient(circle at 90% 15%, rgba(101,214,177,.22), transparent 320px),
    linear-gradient(135deg, rgba(95,124,255,.24), rgba(255,255,255,.07)),
    rgba(17, 25, 39, .78);
  box-shadow: var(--shadow);
}

.notice {
  margin-top: 20px;
  padding: 16px 18px;
  border-radius: 18px;
  background: rgba(242,195,107,.12);
  border: 1px solid rgba(242,195,107,.28);
  color: #ffe4ad;
  font-weight: 700;
}

.download-box {
  border: 1px solid rgba(255,255,255,.18);
  border-radius: 28px;
  padding: 28px;
  background: rgba(8, 13, 24, .36);
  text-align: center;
}

.file-icon {
  width: 82px;
  height: 82px;
  border-radius: 24px;
  display: grid;
  place-items: center;
  margin: 0 auto 18px;
  background: linear-gradient(135deg, #5f7cff, #82ccff);
  font-weight: 1000;
  letter-spacing: .08em;
  box-shadow: 0 20px 44px rgba(95,124,255,.36);
}

.download-box h3 {
  font-size: 22px;
  line-height: 1.35;
}

.download-box p {
  color: var(--muted);
  margin-bottom: 22px;
}

.footer {
  width: min(calc(100% - 36px), var(--max));
  margin: 0 auto;
  padding: 24px 0 46px;
  color: var(--muted);
  display: flex;
  justify-content: space-between;
  gap: 16px;
  border-top: 1px solid var(--line);
}

.footer strong {
  color: var(--text);
}

@media (max-width: 980px) {
  .nav-links {
    display: none;
  }

  .brand {
    min-width: auto;
  }

  .hero,
  .split-section,
  .download-card {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

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

  .stacked-shots {
    min-height: 360px;
  }
}

@media (max-width: 640px) {
  .nav,
  .section,
  .footer {
    width: min(calc(100% - 24px), var(--max));
  }

  .nav {
    border-radius: 20px;
    top: 10px;
    padding: 12px;
  }

  .brand strong {
    font-size: 15px;
  }

  .brand em {
    display: none;
  }

  .brand-mark {
    width: 36px;
    height: 36px;
    border-radius: 12px;
    font-size: 13px;
  }

  .nav-download {
    padding: 9px 11px;
    font-size: 13px;
  }

  .section {
    padding: 48px 0;
  }

  .hero {
    padding-top: 42px;
  }

  h1 {
    font-size: 38px;
    letter-spacing: -1.7px;
  }

  h2 {
    font-size: 30px;
    letter-spacing: -1.1px;
  }

  .lead,
  .section-head p,
  .panel-copy p,
  .download-card p {
    font-size: 15px;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .download-meta span {
    width: calc(50% - 5px);
    text-align: center;
  }

  .window-frame {
    border-radius: 22px;
  }

  .window-bar {
    height: 40px;
  }

  .window-frame img,
  .screen-card img {
    aspect-ratio: 4/3;
  }

  .stats,
  .feature-grid,
  .screen-grid {
    grid-template-columns: 1fr;
  }

  .stat-card,
  .feature-card,
  .panel-copy,
  .download-card,
  .download-box {
    border-radius: 22px;
    padding: 22px;
  }

  .feature-card {
    min-height: auto;
  }

  .stacked-shots {
    min-height: auto;
    display: grid;
    gap: 14px;
  }

  .shot-main,
  .shot-float {
    position: static;
    width: 100%;
    aspect-ratio: 4/3;
  }

  .footer {
    display: grid;
    text-align: center;
  }
}