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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Microsoft YaHei", "PingFang SC", "Segoe UI", sans-serif;
  color: #0f172a;
  background: #f7f9fc;
  line-height: 1.75;
}

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

img {
  width: 100%;
  display: block;
  border-radius: 16px;
}

.container,
.frame {
  width: min(1200px, 92%);
  margin: 0 auto;
}

.header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: #ffffff;
  border-bottom: 1px solid #e2e8f0;
}

.header-row {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 16px;
  align-items: center;
  padding: 16px 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-mark {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, #22c55e, #16a34a);
  color: #fff;
  font-weight: 700;
}

.logo-name {
  font-size: 1.05rem;
  font-weight: 700;
}

.logo-tag {
  font-size: 0.9rem;
  color: #64748b;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  font-size: 0.92rem;
}

.nav a {
  padding: 6px 12px;
  border-radius: 999px;
  background: #eaf6ee;
}

.header-btn {
  padding: 10px 16px;
  border-radius: 999px;
  background: #16a34a;
  color: #fff;
  font-weight: 600;
}

.hero {
  padding: 80px 0 64px;
  background: radial-gradient(circle at top left, rgba(34, 197, 94, 0.15), transparent 60%);
}

.hero-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
  align-items: center;
}

.hero-kicker {
  font-size: 0.85rem;
  letter-spacing: 2px;
  color: #16a34a;
}

h1,
h2,
h3 {
  margin: 0 0 14px;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin: 22px 0;
}

.btn {
  padding: 12px 22px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 600;
}

.btn.primary {
  background: #16a34a;
  color: #fff;
}

.btn.ghost {
  border-color: #16a34a;
  color: #16a34a;
}

.hero-facts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 14px;
  background: #ffffff;
  padding: 18px;
  border-radius: 16px;
  box-shadow: 0 12px 26px rgba(15, 23, 42, 0.08);
}

.fact-num {
  display: block;
  font-weight: 700;
  font-size: 1.1rem;
}

.fact-text {
  font-size: 0.85rem;
  color: #64748b;
}

.hero-caption {
  margin-top: 10px;
  font-size: 0.85rem;
  color: #64748b;
}

.section {
  padding: 64px 0;
}

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

.focus {
  background: #f0f6f2;
}

.focus-grid,
.card-grid,
.collection-grid,
.service-grid,
.download-grid,
.contact-grid,
.signal-grid,
.journey-line {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 18px;
}

.focus-card,
.collection-card,
.service-cards article,
.signal-grid article,
.journey-line article {
  background: #ffffff;
  padding: 20px;
  border-radius: 16px;
  box-shadow: 0 10px 22px rgba(15, 23, 42, 0.06);
}

.cards {
  background: #ffffff;
}

.video-card {
  background: #ffffff;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 12px 26px rgba(15, 23, 42, 0.08);
}

.video-card.featured {
  grid-column: span 2;
}

.thumb {
  position: relative;
  aspect-ratio: 16 / 9;
  background: #eaf6ee;
}

.thumb img {
  height: 100%;
  object-fit: cover;
}

.play {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 52px;
  height: 52px;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: 0 6px 16px rgba(15, 23, 42, 0.2);
}

.play::before {
  content: "";
  position: absolute;
  left: 22px;
  top: 16px;
  width: 0;
  height: 0;
  border-top: 10px solid transparent;
  border-bottom: 10px solid transparent;
  border-left: 16px solid #ef4444;
}

.badge {
  position: absolute;
  left: 12px;
  bottom: 12px;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(22, 163, 74, 0.9);
  color: #fff;
  font-size: 0.8rem;
}

.duration {
  position: absolute;
  right: 12px;
  bottom: 12px;
  padding: 4px 8px;
  border-radius: 10px;
  background: rgba(15, 23, 42, 0.75);
  color: #fff;
  font-size: 0.78rem;
}

.card-body {
  padding: 16px;
}

.meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.85rem;
  color: #64748b;
}

.collections {
  background: #f0f6f2;
}

.collection-card h3 {
  margin-top: 12px;
}

.service {
  background: #ffffff;
}

.service-text {
  grid-column: span 2;
}

.service-cards {
  display: grid;
  gap: 18px;
}

.download {
  background: #f0f6f2;
}

.download-card {
  background: #ffffff;
  padding: 20px;
  border-radius: 16px;
  box-shadow: 0 10px 22px rgba(15, 23, 42, 0.06);
}

.download-card ul {
  margin: 12px 0 0;
  padding-left: 18px;
}

.download-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 16px;
}

.contact {
  background: #ffffff;
}

.contact-card {
  margin-top: 16px;
  padding: 18px;
  border-radius: 16px;
  background: #f8fafc;
  box-shadow: 0 10px 22px rgba(15, 23, 42, 0.06);
}

.footer {
  padding: 26px 0;
  border-top: 1px solid #e2e8f0;
  background: #f0f6f2;
}

.footer-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 16px;
}

.footer-title {
  font-weight: 700;
}

.footer-links {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 0.9rem;
}

@media (max-width: 900px) {
  .header-row {
    grid-template-columns: 1fr;
  }

  .nav {
    justify-content: flex-start;
  }

  .service-text {
    grid-column: span 1;
  }

  .video-card.featured {
    grid-column: span 1;
  }
}

@media (max-width: 600px) {
  .hero-actions,
  .download-actions {
    flex-direction: column;
  }
}