.product-hero {
  background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.6)), url('https://via.placeholder.com/1920x600/00b4d8/ffffff?text=智慧护理系统') center/cover;
  color: white;
  text-align: center;
  padding: 120px 20px 80px;
}

.product-hero h1 {
  font-size: 3.8rem;
  margin-bottom: 1rem;
}

.product-hero p {
  font-size: 1.4rem;
  max-width: 900px;
  margin: 0 auto 2rem;
  opacity: 0.9;
}

.cta-button {
  display: inline-block;
  background: #ff6b6b;
  color: white;
  padding: 15px 40px;
  border-radius: 50px;
  text-decoration: none;
  font-weight: 600;
  font-size: 1.2rem;
  box-shadow: 0 10px 20px rgba(255,107,107,0.3);
  transition: all 0.3s ease;
}

.cta-button:hover {
  transform: translateY(-3px);
  box-shadow: 0 15px 30px rgba(255,107,107,0.4);
}

.product-container {
  max-width: 1200px;
  margin: 6rem auto;
  padding: 0 20px;
}

.section-title {
  text-align: center;
  font-size: 2.5rem;
  color: #0d1b2a;
  margin-bottom: 3rem;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2.5rem;
  margin: 4rem 0;
}

.feature-card {
  background: white;
  padding: 2.5rem;
  border-radius: 15px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.1);
  text-align: center;
  transition: transform 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-10px);
}

.feature-icon {
  width: 80px;
  height: 80px;
  background: #e3f2fd;
  color: #00b4d8;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  border-radius: 50%;
  margin: 0 auto 1.5rem;
}

.feature-card h3 {
  font-size: 1.5rem;
  color: #0d1b2a;
  margin-bottom: 1rem;
}

.architecture {
  background: #f8f9fa;
  padding: 5rem 2rem;
  border-radius: 15px;
  margin: 6rem 0;
  text-align: center;
}

.architecture img {
  max-width: 100%;
  height: auto;
  margin: 2rem auto;
  border-radius: 10px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.benefits {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  margin: 4rem 0;
  text-align: center;
}

.benefit-item {
  padding: 2rem 1.5rem;
  background: white;
  border-radius: 10px;
  box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.benefit-number {
  font-size: 3rem;
  font-weight: 700;
  color: #00b4d8;
  margin-bottom: 0.5rem;
}

.benefit-label {
  font-size: 1.1rem;
  color: #555;
}

.video-section {
  text-align: center;
  margin: 6rem 0;
}

.video-btn {
  display: inline-flex;
  align-items: center;
  gap: 1rem;
  background: #00b4d8;
  color: white;
  padding: 15px 30px;
  border-radius: 50px;
  text-decoration: none;
  font-weight: 600;
  font-size: 1.2rem;
  box-shadow: 0 10px 20px rgba(0,180,216,0.3);
}

.video-btn:hover {
  transform: translateY(-3px);
}

.faq {
  margin: 6rem 0;
}

.faq-item {
  margin-bottom: 1rem;
  border: 1px solid #ddd;
  border-radius: 10px;
  overflow: hidden;
}

.faq-question {
  padding: 1.5rem;
  background: white;
  cursor: pointer;
  font-weight: 600;
  font-size: 1.1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-answer {
  padding: 0 1.5rem;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
  background: #f8f9fa;
}

.faq-answer p {
  padding: 1rem 0;
  line-height: 1.6;
}

.faq-item.active .faq-answer {
  max-height: 200px;
}

/* 侧边申请试用栏 */
.sidebar-cta {
  position: fixed;
  right: 30px;
  top: 120px;
  width: 300px;
  background: white;
  padding: 2rem;
  border-radius: 15px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.15);
  z-index: 100;
  transition: transform 0.3s ease;
}

.sidebar-cta h3 {
  margin-bottom: 1rem;
  color: #0d1b2a;
}

.sidebar-cta form input, .sidebar-cta form button {
  width: 100%;
  padding: 12px;
  margin-bottom: 1rem;
  border: 1px solid #ddd;
  border-radius: 8px;
  box-sizing: border-box;
}

.sidebar-cta form button {
  background: #ff6b6b;
  color: white;
  border: none;
  cursor: pointer;
  font-weight: 600;
}

.sidebar-cta form button:hover {
  background: #e55c5c;
}

/* 响应式：隐藏侧边栏 */
@media (max-width: 992px) {
  .sidebar-cta {
    position: static;
    width: auto;
    margin: 0 20px;
  }
}

/* 模态框 */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.8);
  z-index: 1000;
  justify-content: center;
  align-items: center;
}

.modal-content {
  width: 80%;
  max-width: 800px;
  background: black;
  border-radius: 10px;
  overflow: hidden;
}

.close-btn {
  position: absolute;
  top: 10px;
  right: 10px;
  color: white;
  font-size: 2rem;
  cursor: pointer;
  z-index: 10;
}

.modal video {
  width: 100%;
  height: auto;
}