/* 首页样式 */
body { background: #f3f4f6; min-height: 100vh; }

.hero {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  min-height: calc(100vh - 52px);
  text-align: center; padding: 40px 20px;
  position: relative; overflow: hidden;
  background: linear-gradient(135deg, #1e3a5f 0%, #2d6a9f 60%, #3b82a0 100%);
}
.hero::before {
  content: ''; position: absolute; top: -120px; right: -120px;
  width: 500px; height: 500px; border-radius: 50%;
  background: rgba(255,255,255,0.04); pointer-events: none;
}
.hero::after {
  content: ''; position: absolute; bottom: -80px; left: -80px;
  width: 400px; height: 400px; border-radius: 50%;
  background: rgba(255,255,255,0.03); pointer-events: none;
}
.hero > * { position: relative; z-index: 1; }
.hero-icon { font-size: 64px; margin-bottom: 24px; line-height: 1; }
.hero-title { font-size: 32px; font-weight: 800; color: #fff; margin-bottom: 12px; }
.hero-sub { font-size: 16px; color: rgba(255,255,255,0.75); margin-bottom: 40px; max-width: 480px; line-height: 1.7; }
.hero-btns { display: flex; gap: 16px; flex-wrap: wrap; justify-content: center; }
.btn-hero {
  padding: 13px 32px; border-radius: 8px; font-size: 15px; font-weight: 600;
  text-decoration: none; cursor: pointer; border: none; transition: all 0.15s;
}
.btn-hero.primary { background: #fff; color: #1e3a5f; }
.btn-hero.primary:hover { background: #f0f4f8; }
.btn-hero.secondary { background: transparent; color: #fff; border: 2px solid rgba(255,255,255,0.5); }
.btn-hero.secondary:hover { background: rgba(255,255,255,0.1); border-color: #fff; }
.hero-bg-card {
  position: absolute; border-radius: 12px;
  background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.08); pointer-events: none;
}
.features {
  display: flex; gap: 20px; flex-wrap: wrap; justify-content: center;
  max-width: 860px; margin: 48px auto 0; padding: 0 20px 60px;
}
.feature-card {
  background: #fff; border-radius: 10px; padding: 24px 20px;
  width: 240px; box-shadow: 0 1px 4px rgba(0,0,0,0.07); text-align: center;
}
.feature-icon { font-size: 32px; margin-bottom: 12px; }
.feature-title { font-size: 15px; font-weight: 600; color: #1f2937; margin-bottom: 6px; }
.feature-desc { font-size: 13px; color: #6b7280; line-height: 1.6; }

@media (max-width: 768px) {
  .hero-icon { font-size: 44px; margin-bottom: 16px; }
  .hero-title { font-size: 22px; }
  .hero-sub { font-size: 14px; margin-bottom: 28px; }
  .hero { min-height: auto; padding: 48px 16px 40px; }
  .hero-bg-card { display: none; }
  .btn-hero { padding: 11px 24px; font-size: 14px; }
  .feature-card { width: 100%; max-width: 320px; }
  .features { padding: 0 16px 40px; margin-top: 32px; gap: 14px; }
}