/* ===== 首页样式 ===== */

/* --- Hero --- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding-top: var(--nav-height);
}
.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 50%, rgba(99,102,241,0.08) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 50%, rgba(6,182,212,0.06) 0%, transparent 50%);
}
.hero-content {
  position: relative;
  z-index: 1;
  max-width: 700px;
}
.hero-badge {
  display: inline-block;
  padding: 0.5rem 1.25rem;
  border-radius: 999px;
  background: rgba(129,140,248,0.1);
  border: 1px solid rgba(129,140,248,0.2);
  color: var(--accent-purple);
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: 1.5rem;
}
.hero-title {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 1.5rem;
  letter-spacing: -1px;
}
.hero-sub {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 500px;
  margin-bottom: 2rem;
  line-height: 1.7;
}
.hero-actions { display: flex; gap: 1rem; flex-wrap: wrap; }

/* --- Flywheel --- */
.flywheel { padding: 6rem 0; }
.flywheel-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
}
.flywheel-card {
  background: var(--bg-card);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius-lg);
  padding: 2rem;
  text-align: center;
  transition: var(--transition);
  border-top: 3px solid var(--accent);
}
.flywheel-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}
.fw-icon { font-size: 2.5rem; margin-bottom: 1rem; }
.flywheel-card h3 { margin-bottom: 0.75rem; font-size: 1.1rem; }
.flywheel-card p { color: var(--text-secondary); font-size: 0.9rem; line-height: 1.7; }

/* --- 产品 --- */
.bookshelf { padding: 6rem 0; }
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}
.product-card { position: relative; display: flex; flex-direction: column; }
.pc-tag { position: absolute; top: 1rem; right: 1rem; }
.pc-icon { font-size: 2.5rem; margin-bottom: 0.75rem; }
.product-card h3 { margin-bottom: 0.5rem; }
.pc-desc { color: var(--text-secondary); font-size: 0.9rem; margin-bottom: 1rem; flex: 1; }
.pc-features { display: flex; flex-direction: column; gap: 0.35rem; margin-bottom: 1rem; }
.pc-features span { font-size: 0.85rem; color: var(--text-secondary); }
.pc-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 1rem;
  border-top: 1px solid rgba(255,255,255,0.06);
  margin-top: auto;
}
.pc-link { color: var(--accent-purple); font-size: 0.9rem; font-weight: 500; }
.pc-link:hover { color: var(--accent-cyan); }

/* --- 服务 --- */
.services { padding: 6rem 0; }
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}
.service-card { border-top: 3px solid; }
.service-card h3 { margin-bottom: 0.75rem; font-size: 1.15rem; }
.service-card p { color: var(--text-secondary); font-size: 0.9rem; line-height: 1.7; margin-bottom: 1rem; flex: 1; }
.sc-footer { display: flex; gap: 0.5rem; flex-wrap: wrap; padding-top: 1rem; border-top: 1px solid rgba(255,255,255,0.06); }

/* --- CTA --- */
.cta { padding: 4rem 0; }
.cta-box {
  background: linear-gradient(135deg, rgba(99,102,241,0.1), rgba(6,182,212,0.05));
  border: 1px solid rgba(129,140,248,0.15);
  border-radius: var(--radius-xl);
  padding: 4rem 2rem;
  text-align: center;
}
.cta-box h2 { margin-bottom: 1rem; }
.cta-box p { color: var(--text-secondary); margin-bottom: 2rem; }
.cta-actions { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

/* --- 响应式 --- */
@media (max-width: 640px) {
  .product-grid, .services-grid { grid-template-columns: 1fr; }
  .cta-box { padding: 3rem 1.5rem; }
}