.blob2 {
  width: 520px;
  height: 520px;
  background: radial-gradient(circle at 70% 20%, var(--bg2), transparent 60%);
  right: -160px;
  top: 80px;
  animation-delay: 4s;
}

.blob3 {
  width: 520px;
  height: 520px;
  background: radial-gradient(circle at 40% 70%, var(--bg3), transparent 60%);
  left: 50%;
  bottom: -200px;
  transform: translateX(-50%);
  animation-delay: 8s;
}

@keyframes float {

  0%,
  100% {
    transform: translateY(0)
  }

  50% {
    transform: translateY(-20px)
  }
}

/* 顶部导航 */
.landing-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 28px;
  backdrop-filter: saturate(160%) blur(8px);
  background: rgba(255, 255, 255, 0.7);
  border-bottom: 1px solid var(--border);
}

.brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 6px;
  font-weight: 800;
  letter-spacing: .02em;
}

.logo-circle {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--bg1), var(--bg2));
  box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.8) inset;
}

.brand-name {
  font-size: 16px;
}

.brand-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-logo {
  font-size: 14px;
  font-weight: 900;
  letter-spacing: .06em;
  text-transform: uppercase;
  background: linear-gradient(90deg, var(--bg1), var(--bg2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  filter: drop-shadow(0 1px 6px rgba(124, 58, 237, 0.25));
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border-radius: 999px;
  padding: 10px 16px;
  text-decoration: none;
  font-weight: 600;
  transition: all .2s ease;
}

.btn .iconify {
  vertical-align: -2px;
}

.btn-outline {
  color: var(--text);
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.6);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.9);
}

.btn-primary {
  color: var(--white);
  background: linear-gradient(135deg, var(--bg1), var(--bg2));
  box-shadow: 0 10px 20px rgba(124, 58, 237, 0.25);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 14px 28px rgba(124, 58, 237, 0.32);
}

.btn-soft {
  color: var(--muted);
  background: rgba(15, 23, 42, 0.05);
  border: 1px solid var(--border);
}

.btn-soft:hover {
  background: rgba(15, 23, 42, 0.08);
}

/* Hero */
.hero {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 32px;
  align-items: center;
  padding: 72px 28px;
  max-width: 1200px;
  margin: 0 auto;
}

.hero-content h1 {
  font-size: clamp(28px, 5vw, 48px);
  margin: 0 0 14px;
  line-height: 1.15;
  letter-spacing: .01em;
}

.subtitle {
  font-size: clamp(15px, 2.6vw, 18px);
  color: var(--muted);
  margin: 0 0 22px;
}

.cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.hero-visual {
  min-height: 280px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.card-stack {
  position: relative;
  width: 100%;
  max-width: 420px;
}

.card {
  position: relative;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 16px;
  margin: 12px 0;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.06);
  transform: translateY(calc(var(--i) * -10px));
  opacity: 0;
  animation: cardIn .7s ease forwards;
  animation-delay: calc(var(--i) * .12s);
}

.card-title {
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}

.card-desc {
  color: var(--muted);
}

@keyframes cardIn {
  from {
    opacity: 0;
    transform: translateY(20px)
  }

  to {
    opacity: 1;
    transform: translateY(0)
  }
}

/* 功能区块 */
.features {
  padding: 36px 28px 8px;
  max-width: 1100px;
  margin: 0 auto;
}

.features h2,
.how h2,
.pricing h2 {
  font-size: 24px;
  margin: 0 0 18px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.feature {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 16px;
  transition: transform .2s ease, box-shadow .2s ease;
}

.feature:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.08);
}

.feature h3 {
  margin: 10px 0 6px;
  font-size: 16px;
}

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

/* 使用攻略 */
.how {
  padding: 28px;
  max-width: 1100px;
  margin: 0 auto;
}

.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.step {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 16px;
}

.step-index {
  width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--bg1), var(--bg2));
  color: var(--white);
  font-weight: 800;
  margin-bottom: 8px;
}

.how-cta {
  margin-top: 16px;
}

/* 价格区块 */
.pricing {
  padding: 36px 28px 64px;
  max-width: 900px;
  margin: 0 auto;
}

.pricing-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 22px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.07);
}

.pricing-header {
  border-bottom: 1px dashed var(--border);
  padding-bottom: 12px;
  margin-bottom: 14px;
}

.badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(34, 197, 94, 0.12);
  color: #166534;
  border: 1px solid rgba(34, 197, 94, 0.3);
  font-size: 12px;
  font-weight: 700;
}

.pricing-features {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}

.pricing-features li {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
}

.pricing-cta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 12px;
}

.note {
  color: var(--muted);
  font-size: 12px;
}

/* 页脚 */
.landing-footer {
  padding: 20px 28px;
  border-top: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: saturate(160%) blur(6px);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1100px;
  margin: 0 auto;
}

.footer-content .links {
  display: flex;
  gap: 12px;
}

.footer-content a {
  color: var(--muted);
  text-decoration: none;
}

.footer-content a:hover {
  text-decoration: underline;
}

/* 滚动显现 */
.reveal-on-scroll {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity .6s ease, transform .6s ease;
}

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

/* 响应式 */
@media (max-width: 1024px) {
  .hero {
    grid-template-columns: 1fr;
    padding: 64px 22px;
  }

  .hero-visual {
    order: -1;
    margin-bottom: 10px;
  }

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

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

@media (max-width: 640px) {
  .landing-header {
    padding: 16px 18px;
  }

  .brand-name {
    font-size: 15px;
  }

  .hero {
    padding: 40px 18px;
  }

  .cta-group {
    gap: 10px;
  }

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

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

  .pricing-features {
    grid-template-columns: 1fr;
  }

  .footer-content {
    flex-direction: column;
    gap: 8px;
  }
}