:root {
  --bg: #0b1220;
  --surface: rgba(255, 255, 255, 0.06);
  --surface-hover: rgba(255, 255, 255, 0.1);
  --text: #f0f4f8;
  --text-muted: #a8b5c8;
  --accent-from: #00c6a9;
  --accent-to: #007cf0;
  --accent-glow: rgba(0, 198, 169, 0.35);
  --radius: 18px;
  --max-width: 1080px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family:
    "PingFang SC",
    "Hiragino Sans GB",
    "Microsoft YaHei",
    "Noto Sans SC",
    "WenQuanYi Micro Hei",
    sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

.container {
  width: min(92%, var(--max-width));
  margin-inline: auto;
}

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

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 6rem 0 8rem;
  background:
    radial-gradient(circle at 20% 30%, rgba(0, 198, 169, 0.18), transparent 45%),
    radial-gradient(circle at 80% 70%, rgba(0, 124, 240, 0.16), transparent 45%),
    linear-gradient(160deg, #0b1220 0%, #0d1b2a 100%);
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  opacity: 0.6;
  pointer-events: none;
}

.badge {
  display: inline-block;
  padding: 0.35rem 0.9rem;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--accent-from);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  backdrop-filter: blur(8px);
}

.hero h1 {
  font-size: clamp(2.4rem, 6vw, 4rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 1rem;
  background: linear-gradient(135deg, #fff 0%, #a5e6ff 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.subtitle {
  font-size: clamp(1.05rem, 2.2vw, 1.35rem);
  color: var(--text-muted);
  max-width: 640px;
  margin: 0 auto 2.5rem;
}

.cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
  margin-bottom: 1rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.9rem 1.8rem;
  border-radius: 999px;
  font-size: 1rem;
  font-weight: 600;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-from), var(--accent-to));
  color: #fff;
  box-shadow: 0 8px 28px var(--accent-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 36px rgba(0, 198, 169, 0.45);
}

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

.btn-secondary:hover {
  background: var(--surface-hover);
  transform: translateY(-2px);
}

.trial-note {
  color: var(--accent-from);
  font-size: 0.95rem;
  font-weight: 500;
  margin-top: 0.5rem;
}

.scroll-hint {
  position: absolute;
  bottom: 2.5rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  opacity: 0.5;
  animation: float 2.5s ease-in-out infinite;
}

.wheel {
  width: 22px;
  height: 36px;
  border: 2px solid var(--text-muted);
  border-radius: 12px;
  position: relative;
}

.wheel::after {
  content: "";
  position: absolute;
  top: 6px;
  left: 50%;
  width: 4px;
  height: 6px;
  background: var(--text-muted);
  border-radius: 2px;
  transform: translateX(-50%);
  animation: scrollWheel 1.6s ease-in-out infinite;
}

.arrow {
  color: var(--text-muted);
  font-size: 0.9rem;
}

@keyframes scrollWheel {
  0%, 100% { top: 6px; opacity: 1; }
  50% { top: 16px; opacity: 0.4; }
}

@keyframes float {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(-6px); }
}

section {
  padding: 5rem 0;
}

section h2 {
  text-align: center;
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 700;
  margin-bottom: 3rem;
  letter-spacing: -0.02em;
}

.features {
  background: linear-gradient(180deg, var(--bg) 0%, #0e1626 100%);
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
}

.card {
  background: var(--surface);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius);
  padding: 2rem;
  transition: transform 0.25s ease, background 0.25s ease, box-shadow 0.25s ease;
  backdrop-filter: blur(10px);
}

.card:hover {
  transform: translateY(-6px);
  background: var(--surface-hover);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.25);
}

.card .icon {
  font-size: 2.2rem;
  margin-bottom: 1rem;
}

.card h3 {
  font-size: 1.25rem;
  margin-bottom: 0.6rem;
  color: #fff;
}

.card p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.pricing {
  background: #0e1626;
}

.pricing-card {
  max-width: 560px;
  margin: 0 auto 2rem;
  background: var(--surface);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius);
  padding: 2.5rem;
  text-align: center;
  backdrop-filter: blur(10px);
}

.price-header h3 {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
}

.price {
  font-size: 1.6rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--accent-from), var(--accent-to));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 1.5rem;
}

.benefits {
  list-style: none;
  text-align: left;
  margin-bottom: 2rem;
}

.benefits li {
  padding: 0.7rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  color: var(--text-muted);
  position: relative;
  padding-left: 1.6rem;
}

.benefits li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--accent-from);
  font-weight: 700;
}

.benefits li strong {
  color: #fff;
}

.buy-btn {
  width: 100%;
}

.trial-banner {
  max-width: 720px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  background: linear-gradient(135deg, rgba(0, 198, 169, 0.12), rgba(0, 124, 240, 0.12));
  border: 1px solid rgba(0, 198, 169, 0.2);
  border-radius: var(--radius);
  padding: 2rem;
}

.trial-content h3 {
  font-size: 1.4rem;
  margin-bottom: 0.4rem;
}

.trial-content p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.download {
  text-align: center;
  background: linear-gradient(180deg, #0e1626 0%, var(--bg) 100%);
}

.download p {
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.download-link {
  display: inline-block;
  word-break: break-all;
  padding: 1rem 1.5rem;
  background: var(--surface);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius);
  color: var(--accent-from);
  font-weight: 500;
  transition: background 0.2s ease;
}

.download-link:hover {
  background: var(--surface-hover);
}

.footer {
  text-align: center;
  padding: 2.5rem 0;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  color: var(--text-muted);
  font-size: 0.9rem;
}

@media (max-width: 640px) {
  .hero {
    padding: 5rem 0 6rem;
  }

  .trial-banner {
    text-align: center;
    justify-content: center;
  }

  .btn {
    width: 100%;
  }

  .cta-group {
    width: 100%;
  }
}