*,
*::before,
*::after {
  box-sizing: border-box;
}

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

body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "SF Pro Text",
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  color: #111827;
  background-color: #f5f6fb;
  -webkit-font-smoothing: antialiased;
}

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

img {
  max-width: 100%;
  display: block;
}

.container {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 20px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(18px);
  background: rgba(245, 246, 251, 0.85);
  border-bottom: 1px solid rgba(148, 163, 184, 0.18);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

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

.logo-img {
  width: 32px;
  height: 32px;
  border-radius: 12px;
  box-shadow: 0 12px 30px rgba(99, 102, 241, 0.4);
  object-fit: cover;
}

.logo-img.small {
  width: 24px;
  height: 24px;
  border-radius: 8px;
  box-shadow: 0 8px 18px rgba(99, 102, 241, 0.3);
}

.logo-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.logo-title {
  font-size: 18px;
  font-weight: 700;
}

.logo-subtitle {
  font-size: 11px;
  color: #6b7280;
}

.nav {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 14px;
  color: #4b5563;
}

.nav a {
  padding: 6px 0;
  position: relative;
}

.nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -4px;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, #367eff, #1757d5);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 0.2s ease-out;
}

.nav a:hover::after {
  transform: scaleX(1);
}

.nav-cta {
  font-size: 13px;
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid rgba(54, 126, 255, 0.6);
  background: radial-gradient(circle at 0 0, rgba(54, 126, 255, 0.12), transparent),
    #ffffff;
  color: #111827;
  font-weight: 500;
}

.hero {
  padding: 64px 0 32px;
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
  gap: 40px;
  align-items: center;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(54, 126, 255, 0.08);
  color: #367eff;
  font-size: 12px;
  font-weight: 500;
}

.hero h1 {
  margin: 18px 0 12px;
  font-size: 40px;
  line-height: 1.15;
  letter-spacing: -0.03em;
}

.hero-desc {
  margin: 0;
  font-size: 15px;
  color: #4b5563;
}

.hero-desc strong {
  font-weight: 600;
  color: #111827;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 18px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  border: none;
}

.btn.primary {
  background: linear-gradient(135deg, #367eff, #1757d5);
  color: #ffffff;
  box-shadow: 0 18px 40px rgba(79, 70, 229, 0.45);
}

.btn.ghost {
  background: rgba(255, 255, 255, 0.85);
  color: #111827;
  border: 1px solid rgba(148, 163, 184, 0.5);
}

.hero-meta {
  margin-top: 14px;
  font-size: 12px;
  color: #6b7280;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.hero-preview {
  display: flex;
  justify-content: flex-end;
}

.phone-frame {
  width: 280px;
  border-radius: 32px;
  padding: 12px;
  background: radial-gradient(circle at 0 0, rgba(54, 126, 255, 0.3), transparent),
    #020617;
  box-shadow: 0 24px 60px rgba(15, 23, 42, 0.7);
}

.phone-notch {
  width: 90px;
  height: 16px;
  border-radius: 999px;
  margin: 4px auto 10px;
  background: rgba(15, 23, 42, 0.92);
}

.phone-screen {
  border-radius: 24px;
  background: radial-gradient(circle at 0 0, #1f2937, #020617);
  padding: 16px 14px 18px;
  color: #e5e7eb;
  font-size: 12px;
  overflow: hidden;
}

.phone-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
  font-size: 11px;
  color: #9ca3af;
}

.miniapp-tag {
  padding: 2px 8px;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.7);
}

.phone-card {
  border-radius: 14px;
  padding: 10px 12px;
  background: rgba(15, 23, 42, 0.85);
  border: 1px solid rgba(148, 163, 184, 0.4);
  margin-bottom: 10px;
}

.phone-card.primary {
  background: radial-gradient(circle at 0 0, rgba(248, 113, 113, 0.45), transparent),
    rgba(15, 23, 42, 0.95);
  border-color: rgba(248, 113, 113, 0.9);
}

.phone-card h3 {
  margin: 0 0 4px;
  font-size: 13px;
  font-weight: 600;
}

.phone-card p {
  margin: 0 0 4px;
  font-size: 11px;
  color: #d1d5db;
}

.phone-card ul {
  margin: 0;
  padding-left: 18px;
  font-size: 11px;
  color: #9ca3af;
}

.section {
  padding: 56px 0;
}

.section.muted {
  background: #eef1ff;
}

.section.highlight {
  background: radial-gradient(circle at 0 0, rgba(236, 72, 153, 0.28), transparent),
    radial-gradient(circle at 100% 0, rgba(59, 130, 246, 0.25), transparent),
    #111827;
  color: #f9fafb;
}

.section-head {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 32px;
}

.section-head h2 {
  margin: 0 0 8px;
  font-size: 26px;
}

.section-head p {
  margin: 0;
  font-size: 14px;
  color: #6b7280;
}

.section.highlight .section-head p {
  color: #e5e7eb;
}

.grid {
  display: grid;
  gap: 20px;
}

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

.card {
  border-radius: 18px;
  background: #ffffff;
  border: 1px solid rgba(148, 163, 184, 0.28);
  box-shadow: 0 18px 40px rgba(15, 23, 42, 0.06);
  padding: 18px 18px 20px;
}

.feature-card h3 {
  margin: 10px 0 8px;
  font-size: 18px;
}

.feature-card p {
  margin: 0 0 10px;
  font-size: 14px;
  color: #4b5563;
}

.feature-card ul {
  margin: 0;
  padding-left: 18px;
  font-size: 13px;
  color: #6b7280;
}

.badge {
  display: inline-flex;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 500;
  background: rgba(54, 126, 255, 0.08);
  color: #367eff;
}

.badge.accent {
  background: rgba(236, 72, 153, 0.08);
  color: #db2777;
}

.badge.neutral {
  background: rgba(52, 211, 153, 0.08);
  color: #059669;
}

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

.scene-block {
  padding: 18px 18px 20px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.85);
  border: 1px solid rgba(148, 163, 184, 0.4);
}

.scene-block h3 {
  margin: 0 0 8px;
  font-size: 17px;
}

.scene-block p {
  margin: 0 0 10px;
  font-size: 14px;
  color: #4b5563;
}

.scene-block ul {
  margin: 0;
  padding-left: 18px;
  font-size: 13px;
  color: #6b7280;
}

.steps {
  display: grid;
  gap: 16px;
  max-width: 720px;
  margin: 0 auto;
}

.step {
  display: flex;
  gap: 14px;
  padding: 14px 16px;
  border-radius: 14px;
  background: #ffffff;
  border: 1px solid rgba(148, 163, 184, 0.35);
}

.step-index {
  width: 26px;
  height: 26px;
  border-radius: 999px;
  background: linear-gradient(135deg, #367eff, #1757d5);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 600;
  flex-shrink: 0;
}

.step-body h3 {
  margin: 0 0 4px;
  font-size: 15px;
}

.step-body p {
  margin: 0;
  font-size: 13px;
  color: #4b5563;
}

.download-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  gap: 32px;
  align-items: center;
}

.download-copy h2 {
  margin: 0 0 10px;
  font-size: 26px;
}

.download-copy p {
  margin: 0 0 14px;
  font-size: 14px;
}

.download-points {
  margin: 0;
  padding-left: 18px;
  font-size: 13px;
}

.download-qr {
  justify-self: center;
  text-align: center;
}

.qr-image {
  width: 160px;
  height: 160px;
  border-radius: 24px;
  border: 1px solid rgba(156, 163, 175, 0.4);
  background: #ffffff;
  box-shadow: 0 18px 40px rgba(15, 23, 42, 0.45);
  object-fit: cover;
  display: block;
  margin: 0 auto;
}

.qr-tip {
  margin-top: 10px;
  font-size: 12px;
  color: #9ca3af;
}

.faq-list {
  max-width: 720px;
  margin: 0 auto;
  display: grid;
  gap: 10px;
}

.faq-list details {
  border-radius: 12px;
  background: #ffffff;
  border: 1px solid rgba(148, 163, 184, 0.35);
  padding: 10px 12px;
}

.faq-list summary {
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  list-style: none;
}

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

.faq-list p {
  margin: 8px 0 0;
  font-size: 13px;
  color: #4b5563;
}

.site-footer {
  padding: 18px 0 20px;
  border-top: 1px solid rgba(148, 163, 184, 0.35);
  background: #0b1120;
  color: #9ca3af;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 8px;
}

.footer-title {
  font-size: 13px;
}

.footer-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 12px;
}

@media (max-width: 960px) {
  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero-preview {
    justify-content: center;
  }

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

  .download-inner {
    grid-template-columns: minmax(0, 1fr);
  }

  .header-inner {
    gap: 10px;
  }

  .nav {
    display: none;
  }
}

@media (max-width: 640px) {
  .hero {
    padding-top: 40px;
  }

  .hero h1 {
    font-size: 30px;
  }

  .features-grid,
  .scenes-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .card,
  .scene-block {
    border-radius: 14px;
  }

  .header-inner {
    height: 58px;
  }
}