:root {
  --bg: #0a0e17;
  --surface: #141b2d;
  --surface-light: #1e2740;
  --border: #2a3550;
  --accent: #00e5a0;
  --accent-dim: #00b87a;
  --text: #f0f4ff;
  --text-secondary: #8b95a8;
  --text-muted: #5a6478;
  --danger: #ff4757;
  --radius: 14px;
  --shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
}

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

body {
  font-family: Inter, system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

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

.container {
  width: min(1120px, 92%);
  margin: 0 auto;
}

.header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(12px);
  background: rgba(10, 14, 23, 0.85);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 700;
  font-size: 1.1rem;
}

.brand-icon {
  display: inline-flex;
  width: 36px;
  height: 36px;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), #00b4d8);
}

.nav {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.nav a {
  color: var(--text-secondary);
  font-size: 0.92rem;
}

.nav a:hover {
  color: var(--text);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.35rem;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--accent), var(--accent-dim));
  color: #041018;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 30px rgba(0, 229, 160, 0.25);
}

.btn-sm {
  padding: 0.55rem 1rem;
  font-size: 0.88rem;
}

.btn-ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

.hero {
  padding: 5rem 0 4rem;
  background:
    radial-gradient(circle at 20% 20%, rgba(0, 229, 160, 0.08), transparent 35%),
    radial-gradient(circle at 80% 0%, rgba(0, 180, 216, 0.08), transparent 30%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 2rem;
  align-items: center;
}

.badge {
  display: inline-block;
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  background: rgba(0, 229, 160, 0.12);
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  line-height: 1.08;
  margin-bottom: 1rem;
}

.lead {
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 540px;
  margin-bottom: 1.5rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 2rem;
}

.hero-stats {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.hero-stats li {
  display: flex;
  flex-direction: column;
}

.hero-stats strong {
  font-size: 1.2rem;
}

.hero-stats span {
  color: var(--text-muted);
  font-size: 0.82rem;
}

.hero-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
  position: relative;
}

.status-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent);
  position: absolute;
  top: 1.2rem;
  right: 1.2rem;
}

.card-label {
  color: var(--text-muted);
  font-size: 0.82rem;
}

.card-status {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--accent);
  margin: 0.35rem 0 1rem;
}

.card-row {
  display: flex;
  justify-content: space-between;
  padding: 0.55rem 0;
  border-top: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 0.92rem;
}

.section {
  padding: 4rem 0;
}

.section-alt {
  background: var(--surface);
  border-block: 1px solid var(--border);
}

.section h2 {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

.section-sub {
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin-top: 2rem;
}

.feature {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
}

.feature h3 {
  margin-bottom: 0.5rem;
}

.feature p {
  color: var(--text-secondary);
  font-size: 0.92rem;
}

.pricing {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
}

.plan {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  position: relative;
}

.plan-featured {
  border-color: rgba(0, 229, 160, 0.45);
  box-shadow: 0 0 0 1px rgba(0, 229, 160, 0.15);
}

.plan-tag {
  position: absolute;
  top: 1rem;
  right: 1rem;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--accent);
  background: rgba(0, 229, 160, 0.12);
  padding: 0.25rem 0.5rem;
  border-radius: 999px;
}

.plan h3 {
  margin-bottom: 0.35rem;
}

.price {
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.plan ul {
  list-style: none;
  color: var(--text-secondary);
  font-size: 0.92rem;
}

.plan li {
  padding: 0.35rem 0;
  border-top: 1px solid var(--border);
}

.plan li:first-child {
  border-top: none;
}

.download {
  text-align: center;
}

.download p {
  color: var(--text-secondary);
  max-width: 620px;
  margin: 0.75rem auto 1.5rem;
}

.download-actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.note {
  margin-top: 1.25rem;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.note code {
  background: var(--surface-light);
  padding: 0.15rem 0.35rem;
  border-radius: 6px;
}

.guide-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
  margin-top: 1.5rem;
}

.guide-step {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
}

.guide-step-highlight {
  border-color: rgba(0, 229, 160, 0.45);
  grid-column: 1 / -1;
}

.guide-num {
  display: inline-flex;
  width: 28px;
  height: 28px;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  background: rgba(0, 229, 160, 0.15);
  color: var(--accent);
  font-weight: 700;
  font-size: 0.85rem;
  margin-bottom: 0.75rem;
}

.guide-step h3 {
  font-size: 1.05rem;
  margin-bottom: 0.65rem;
}

.guide-step p {
  color: var(--text-secondary);
  font-size: 0.92rem;
  margin-bottom: 0.5rem;
}

.guide-en {
  font-size: 0.82rem !important;
  color: var(--text-muted) !important;
  font-style: italic;
}

.guide-list {
  margin: 0.5rem 0 0.75rem 1.1rem;
  color: var(--text-secondary);
  font-size: 0.92rem;
}

.guide-list li {
  margin-bottom: 0.45rem;
}

.guide-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2rem;
}

.footer {
  border-top: 1px solid var(--border);
  padding: 2rem 0;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem;
  color: var(--text-secondary);
  font-size: 0.88rem;
}

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

@media (max-width: 820px) {
  .nav a:not(.btn):not([href="#guide"]):not([href="#download"]) {
    display: none;
  }

  .nav {
    gap: 0.75rem;
  }

  .nav a {
    font-size: 0.82rem;
  }

  .hero-grid {
    grid-template-columns: 1fr;
  }

  .guide-step-highlight {
    grid-column: auto;
  }
}