:root {
  --bg: #05010a;
  --bg-soft: #0f0a1b;
  --accent: #7e52ff;
  --accent-light: #c4b5fd;
  --text: #f5f5f5;
  --muted: #b5b6c2;
  --card: rgba(255, 255, 255, 0.04);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Inter", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
}

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

.container {
  width: min(1120px, 90%);
  margin: 0 auto;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 0;
}

.logo {
  font-size: 1.3rem;
  font-weight: 600;
  letter-spacing: 0.3rem;
}

.hero {
  min-height: 85vh;
  background: radial-gradient(circle at top, rgba(126, 82, 255, 0.25), transparent 45%),
    radial-gradient(circle at 20% 20%, rgba(58, 241, 188, 0.2), transparent 40%), var(--bg);
  position: relative;
  overflow: hidden;
}

.hero::after {
  content: "";
  position: absolute;
  width: 60vw;
  height: 60vw;
  background: radial-gradient(circle, rgba(126, 82, 255, 0.15), transparent 60%);
  top: -20%;
  right: -10%;
  filter: blur(40px);
  z-index: 0;
}

.hero-content {
  padding: 80px 0 60px;
  position: relative;
  z-index: 1;
}

.tagline {
  letter-spacing: 0.3rem;
  color: var(--accent-light);
  text-transform: uppercase;
  font-size: 0.75rem;
}

h1 {
  font-size: clamp(2.4rem, 5vw, 3.8rem);
  margin: 0.6em 0;
}

.lead {
  color: var(--muted);
  max-width: 640px;
}

.hero-actions {
  margin-top: 1.6rem;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.cta {
  padding: 0.85rem 1.8rem;
  border-radius: 999px;
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  transition: transform 0.2s ease, opacity 0.2s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.cta:hover {
  transform: translateY(-2px);
  opacity: 0.95;
}

.cta.ghost {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.hero-visual {
  position: absolute;
  right: 5%;
  top: 10%;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: radial-gradient(circle, rgba(234, 132, 255, 0.3), transparent 65%);
  z-index: 0;
}

main {
  background: var(--bg-soft);
}

.section {
  padding: 80px 0;
}

.section h2 {
  font-size: 2.1rem;
}

.section-lead {
  color: var(--muted);
  max-width: 760px;
}

.grid {
  display: grid;
  gap: 28px;
}

.grid.two {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.grid.three {
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

.card {
  background: var(--card);
  padding: 28px;
  border-radius: 20px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(16px);
}

.card h3 {
  margin-top: 0;
}

.highlight {
  border-color: rgba(126, 82, 255, 0.4);
}

.stat {
  margin-top: 20px;
}

.stat .number {
  display: block;
  font-size: 2rem;
  font-weight: 600;
}

.stat .label {
  color: var(--muted);
}

.list {
  padding-left: 20px;
  color: var(--muted);
}

.tinted {
  background: radial-gradient(circle at top, rgba(255, 255, 255, 0.02), transparent 40%), var(--bg);
}

.callout {
  text-align: center;
}

.signup {
  margin-top: 24px;
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

.signup input {
  padding: 0.8rem 1.2rem;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.3);
  background: transparent;
  color: #fff;
  min-width: 280px;
}

.signup button {
  border: none;
  cursor: pointer;
  font-size: 1rem;
}

footer {
  padding: 40px 0 24px;
  background: #030005;
  color: var(--muted);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 40px;
  margin-bottom: 24px;
}

footer h4 {
  margin-bottom: 0.8rem;
  color: var(--text);
}

footer a {
  display: block;
  color: var(--muted);
  margin-bottom: 6px;
}

footer a:hover {
  color: #fff;
}

@media (max-width: 640px) {
  .hero-visual {
    display: none;
  }
}