:root {
  --bg: #eef7ff;
  --bg-accent: #f8fcff;
  --panel: rgba(255, 255, 255, 0.82);
  --panel-border: rgba(102, 176, 231, 0.28);
  --text: #16324b;
  --muted: #5f7991;
  --line: rgba(118, 181, 232, 0.26);
  --glow: rgba(126, 196, 242, 0.28);
  --accent: #3f9fe7;
  --accent-strong: #2d87d8;
  --shadow: 0 24px 80px rgba(94, 141, 186, 0.16);
  --radius: 24px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(121, 198, 245, 0.35), transparent 28%),
    radial-gradient(circle at 85% 12%, rgba(170, 227, 255, 0.55), transparent 22%),
    linear-gradient(180deg, #f8fdff 0%, #edf7ff 48%, #e5f2fb 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(71, 144, 192, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(71, 144, 192, 0.06) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.55), transparent 90%);
}

.page-shell {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding: 72px 0 32px;
}

.hero {
  position: relative;
  padding: 48px;
  border: 1px solid var(--panel-border);
  border-radius: calc(var(--radius) + 6px);
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.92), rgba(239, 248, 255, 0.88)),
    var(--panel);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto -8% -42% auto;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(111, 196, 255, 0.36), transparent 70%);
}

.eyebrow {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: 0.32em;
  color: var(--accent);
}

h1 {
  margin: 0;
  font-size: clamp(42px, 8vw, 88px);
  line-height: 1.02;
  letter-spacing: 0.04em;
}

.subtitle {
  max-width: 660px;
  margin: 18px 0 0;
  font-size: clamp(16px, 2.2vw, 21px);
  line-height: 1.8;
  color: var(--muted);
}

.apps-section {
  margin-top: 28px;
  padding: 10px 2px 0;
}

.section-head {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: end;
  margin-bottom: 20px;
}

.section-head h2 {
  margin: 0;
  font-size: 24px;
}

.section-head p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.app-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.app-card {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 250px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.95), rgba(243, 250, 255, 0.92));
  box-shadow: 0 18px 60px rgba(111, 162, 205, 0.18);
  text-decoration: none;
  color: inherit;
  transition: transform 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
}

.app-card:hover {
  transform: translateY(-6px);
  border-color: rgba(92, 175, 231, 0.52);
  box-shadow: 0 28px 64px rgba(74, 146, 203, 0.2);
}

.app-card--muted:hover {
  transform: translateY(-4px);
}

.icon-wrap,
.placeholder-icon {
  display: grid;
  place-items: center;
  width: 72px;
  height: 72px;
  border: 1px solid rgba(107, 184, 233, 0.26);
  border-radius: 20px;
  background: linear-gradient(180deg, rgba(249, 253, 255, 0.98), rgba(235, 246, 254, 0.9));
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.45);
}

.icon-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 18px;
}

.placeholder-icon span {
  display: block;
  width: 28px;
  height: 28px;
  border: 2px solid rgba(90, 167, 220, 0.78);
  border-radius: 8px;
  position: relative;
}

.placeholder-icon span::before,
.placeholder-icon span::after {
  content: "";
  position: absolute;
  background: rgba(90, 167, 220, 0.78);
}

.placeholder-icon span::before {
  inset: 50% 4px auto;
  height: 2px;
  transform: translateY(-50%);
}

.placeholder-icon span::after {
  inset: 4px auto 4px 50%;
  width: 2px;
  transform: translateX(-50%);
}

.placeholder-icon--alt span {
  border-radius: 999px;
}

.card-copy {
  margin-top: 28px;
}

.card-copy h3 {
  margin: 0;
  font-size: 24px;
}

.card-copy p {
  margin: 12px 0 0;
  line-height: 1.75;
  color: var(--muted);
  font-size: 14px;
}

.card-tag {
  margin-top: auto;
  display: inline-flex;
  width: fit-content;
  padding: 8px 12px;
  border: 1px solid rgba(109, 185, 233, 0.28);
  border-radius: 999px;
  background: rgba(109, 185, 233, 0.1);
  color: var(--accent);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.footer {
  padding: 28px 4px 6px;
}

.footer p {
  margin: 0;
  color: #6b8198;
  font-size: 13px;
}

.footer a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid rgba(109, 185, 233, 0.32);
  transition: color 180ms ease, border-color 180ms ease;
}

.footer a:hover {
  color: var(--accent-strong);
  border-color: rgba(45, 135, 216, 0.5);
}

@media (max-width: 920px) {
  .app-grid {
    grid-template-columns: 1fr;
  }

  .section-head {
    flex-direction: column;
    align-items: start;
  }
}

@media (max-width: 640px) {
  .page-shell {
    width: min(100% - 20px, 1120px);
    padding-top: 20px;
  }

  .hero {
    padding: 28px 22px;
  }

  .app-card {
    min-height: 220px;
    padding: 20px;
  }

  .card-copy {
    margin-top: 22px;
  }
}