:root {
  --bg: #060b0a;
  --bg-soft: #0d1714;
  --panel: rgba(14, 28, 24, 0.78);
  --line: rgba(80, 195, 160, 0.3);
  --text: #e8fff8;
  --muted: #9ec8bc;
  --accent: #10a37f;
  --accent-2: #28d7aa;
  --radius: 16px;
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.34);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: system-ui, -apple-system, Segoe UI, PingFang SC, Hiragino Sans GB, Microsoft YaHei, sans-serif;
  background:
    radial-gradient(circle at 16% -10%, rgba(16, 163, 127, 0.22), transparent 30%),
    radial-gradient(circle at 86% 8%, rgba(40, 215, 170, 0.15), transparent 34%),
    linear-gradient(180deg, #050a09 0%, var(--bg) 48%, #050907 100%);
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.6;
}

.container {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.bg-glow {
  position: fixed;
  pointer-events: none;
  border-radius: 50%;
  filter: blur(75px);
  z-index: -2;
  animation: pulse 9s ease-in-out infinite alternate;
}

.glow-1 {
  width: 360px;
  height: 360px;
  background: rgba(16, 163, 127, 0.24);
  top: 10%;
  left: -90px;
}

.glow-2 {
  width: 440px;
  height: 440px;
  background: rgba(40, 215, 170, 0.2);
  right: -130px;
  top: 44%;
  animation-delay: 2s;
}

@keyframes pulse {
  from {
    transform: translateY(0) scale(0.92);
    opacity: 0.62;
  }

  to {
    transform: translateY(-16px) scale(1.06);
    opacity: 0.95;
  }
}

.nav {
  position: sticky;
  top: 14px;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 16px;
  padding: 12px 16px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(7, 17, 14, 0.72);
  backdrop-filter: blur(10px);
}

.brand {
  color: var(--text);
  text-decoration: none;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.nav-actions {
  display: flex;
  gap: 10px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: 12px;
  border: 1px solid transparent;
  padding: 10px 16px;
  text-decoration: none;
  color: var(--text);
  font-weight: 600;
  transition: transform 0.22s ease, box-shadow 0.22s ease, border-color 0.22s ease, background 0.22s ease;
}

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

.btn-primary {
  background: linear-gradient(140deg, var(--accent), #12b58c 52%, var(--accent-2));
  color: #04241c;
  box-shadow: 0 0 0 rgba(16, 163, 127, 0);
}

.btn-primary:hover {
  box-shadow: 0 10px 32px rgba(16, 163, 127, 0.38);
}

.btn-secondary,
.btn-ghost {
  border-color: rgba(92, 190, 161, 0.42);
  background: rgba(18, 40, 34, 0.54);
}

.btn-secondary:hover,
.btn-ghost:hover {
  border-color: rgba(40, 215, 170, 0.85);
  box-shadow: 0 6px 20px rgba(16, 163, 127, 0.24);
}

.btn-lg {
  padding: 12px 20px;
}

.hero {
  padding: 100px 0 74px;
  text-align: center;
}

.eyebrow {
  display: inline-block;
  margin: 0 0 18px;
  border: 1px solid rgba(40, 215, 170, 0.48);
  border-radius: 999px;
  padding: 6px 12px;
  color: #83f0cf;
  background: rgba(16, 163, 127, 0.12);
  font-size: 0.92rem;
}

h1 {
  margin: 0;
  font-size: clamp(2rem, 5.8vw, 4rem);
  line-height: 1.12;
  letter-spacing: 0.01em;
}

h1 span {
  display: block;
  background: linear-gradient(90deg, #93ffd8, #5de7bf 45%, #1ecf9e);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.subtitle {
  margin: 22px auto 0;
  max-width: 780px;
  color: var(--muted);
  font-size: clamp(1rem, 2.5vw, 1.2rem);
}

.hero-cta {
  margin-top: 32px;
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

.hero-note {
  margin-top: 18px;
  color: #86f2d3;
  font-size: 0.95rem;
}

.section {
  padding: 58px 0;
}

.section-head {
  margin-bottom: 24px;
}

.section-head h2 {
  margin: 0;
  font-size: clamp(1.5rem, 4vw, 2.2rem);
}

.section-head p {
  margin: 12px 0 0;
  color: var(--muted);
}

.grid.cards,
.grid.model-cards {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid.model-cards {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  padding: 20px;
  box-shadow: var(--shadow);
  transition: transform 0.24s ease, border-color 0.24s ease, box-shadow 0.24s ease;
}

.card:hover {
  transform: translateY(-4px);
  border-color: rgba(40, 215, 170, 0.72);
  box-shadow: 0 16px 40px rgba(16, 163, 127, 0.16);
}

.card h3 {
  margin: 0 0 8px;
}

.card p {
  margin: 0;
  color: var(--muted);
}

.card strong {
  display: inline-block;
  margin-top: 12px;
  color: #8cf6d7;
  font-size: 0.95rem;
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-bottom: 16px;
}

.step {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(13, 29, 24, 0.76);
  padding: 18px;
}

.step-index {
  display: inline-block;
  color: #7cf4d2;
  font-weight: 700;
  font-size: 0.92rem;
  letter-spacing: 0.08em;
}

.step h3 {
  margin: 8px 0;
  font-size: 1.04rem;
}

.step p {
  margin: 0;
  color: var(--muted);
}

.code-block {
  margin-top: 18px;
  border: 1px solid rgba(92, 190, 161, 0.4);
  border-radius: var(--radius);
  overflow: auto;
  background: #07120f;
  box-shadow: var(--shadow);
}

.code-block pre {
  margin: 0;
  padding: 18px;
  min-width: 640px;
}

.code-block code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, Liberation Mono, monospace;
  font-size: 0.93rem;
  color: #ddfff5;
}

.code-block .k {
  color: #8ef5d8;
}

.code-block .s {
  color: #b3ffd8;
}

.billing-grid {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.billing-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(12, 27, 22, 0.8);
  padding: 20px;
  box-shadow: var(--shadow);
  transition: transform 0.24s ease, border-color 0.24s ease;
}

.billing-card:hover {
  transform: translateY(-4px);
  border-color: rgba(40, 215, 170, 0.72);
}

.billing-card h3 {
  margin: 0;
}

.billing-card p {
  margin: 10px 0 0;
  color: var(--muted);
}

.price {
  font-size: 2rem;
  font-weight: 800;
  line-height: 1.2;
  color: #92ffd9;
}

.price span {
  font-size: 1rem;
  font-weight: 600;
  color: var(--muted);
}

.featured {
  border-color: rgba(40, 215, 170, 0.72);
  background: linear-gradient(160deg, rgba(16, 163, 127, 0.18), rgba(12, 27, 22, 0.92));
}

.faq-list {
  display: grid;
  gap: 10px;
}

.faq {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(11, 22, 19, 0.8);
  padding: 0 14px;
}

.faq summary {
  list-style: none;
  cursor: pointer;
  padding: 14px 0;
  font-weight: 600;
}

.faq summary::-webkit-details-marker {
  display: none;
}

.faq p {
  margin: 0 0 14px;
  color: var(--muted);
}

.footer {
  padding: 64px 0 80px;
}

.footer-inner {
  text-align: center;
  border: 1px solid rgba(92, 190, 161, 0.42);
  border-radius: 20px;
  background: linear-gradient(155deg, rgba(16, 163, 127, 0.15), rgba(7, 20, 16, 0.9));
  padding: 40px 20px;
}

.footer-inner h2 {
  margin: 0;
  font-size: clamp(1.4rem, 4vw, 2rem);
}

.footer-inner p {
  margin: 12px 0 22px;
  color: var(--muted);
}

.contact {
  margin-top: 18px;
}

.contact a {
  color: #8df7d8;
  text-decoration: none;
}

.contact a:hover {
  text-decoration: underline;
}

.footer-inner small {
  display: block;
  margin-top: 18px;
  color: #7ca99b;
}

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1024px) {
  .grid.model-cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .billing-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (max-width: 700px) {
  .container {
    width: min(1120px, calc(100% - 28px));
  }

  .nav {
    top: 8px;
    padding: 10px;
  }

  .brand {
    font-size: 0.95rem;
  }

  .hero {
    padding-top: 86px;
  }

  .grid.cards,
  .grid.model-cards,
  .billing-grid {
    grid-template-columns: 1fr;
  }

  .btn {
    padding: 10px 14px;
  }

  .nav-actions {
    gap: 8px;
  }
}