:root {
  --primary-blue: #1a73e8;
  --light-blue: #e8f0fe;
  --dark-blue: #0d47a1;
  --white: #ffffff;
  --light-gray: #f5f5f5;
  --gray: #757575;
  --dark-gray: #333333;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
  background-color: var(--light-gray);
  color: var(--dark-gray);
  line-height: 1.6;
}

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

header {
  background-color: var(--white);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  position: sticky;
  top: 0;
  z-index: 100;
}

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 0;
}

.logo {
  font-size: 1.5rem;
  font-weight: bold;
  color: var(--primary-blue);
  text-decoration: none;
}

.nav-links {
  display: flex;
  list-style: none;
}

.nav-links li {
  margin-left: 25px;
}

.nav-links a {
  color: var(--dark-gray);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s;
}

.nav-links a:hover {
  color: var(--primary-blue);
}

.hero {
  background-color: var(--light-blue);
  padding: 60px 0;
  text-align: center;
}

.hero h1 {
  font-size: 2.5rem;
  margin-bottom: 20px;
  color: var(--dark-blue);
}

.hero p {
  font-size: 1.1rem;
  color: var(--gray);
  max-width: 700px;
  margin: 0 auto;
}

.section-title {
  font-size: 2rem;
  margin: 40px 0 20px;
  color: var(--dark-blue);
  border-bottom: 3px solid var(--primary-blue);
  padding-bottom: 10px;
  display: inline-block;
}

.card-container {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 25px;
  margin: 30px 0;
}

.card {
  background-color: var(--white);
  border-radius: 8px;
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
  overflow: hidden;
  transition: transform 0.3s, box-shadow 0.3s;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.card-img {
  width: 100%;
  height: 200px;
  background-color: var(--light-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.card-img img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 20px;
}

.medicine-image-container {
  width: 600px;
  height: 600px;
  background-color: var(--light-blue);
  border-radius: 8px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-right: 20px;
  flex-shrink: 0;
}

.medicine-image-container img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 20px;
}

.medicine-header {
  display: flex;
  align-items: center;
  border-bottom: 1px solid #e0e0e0;
  padding-bottom: 20px;
  margin-bottom: 20px;
}

.medicine-info {
  flex-grow: 1;
}

.card-content {
  padding: 20px;
}

.card-title {
  font-size: 1.2rem;
  font-weight: bold;
  margin-bottom: 10px;
  color: var(--dark-blue);
}

.card-text {
  color: var(--gray);
  margin-bottom: 15px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.btn {
  display: inline-block;
  background-color: var(--primary-blue);
  color: var(--white);
  padding: 10px 20px;
  border-radius: 5px;
  text-decoration: none;
  font-weight: 500;
  transition: background-color 0.3s;
  border: none;
  cursor: pointer;
  font-size: 1rem;
}

.btn:hover {
  background-color: var(--dark-blue);
}

.medicine-detail {
  background-color: var(--white);
  border-radius: 8px;
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
  padding: 30px;
  margin: 30px 0;
}

.medicine-header {
  border-bottom: 1px solid #e0e0e0;
  padding-bottom: 20px;
  margin-bottom: 20px;
}

.medicine-name {
  font-size: 1.8rem;
  color: var(--dark-blue);
  margin-bottom: 10px;
}

.medicine-manufacturer {
  color: var(--gray);
  font-style: italic;
}

.detail-section {
  margin-bottom: 25px;
}

.detail-section h3 {
  color: var(--primary-blue);
  margin-bottom: 10px;
  font-size: 1.3rem;
}

.detail-section p {
  color: var(--dark-gray);
  line-height: 1.7;
}

.form-container {
  background-color: var(--white);
  border-radius: 8px;
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
  padding: 30px;
  max-width: 500px;
  margin: 30px auto;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  color: var(--dark-gray);
  font-weight: 500;
}

.form-group input,
.form-group select {
  width: 100%;
  padding: 12px;
  border: 1px solid #ddd;
  border-radius: 5px;
  font-size: 1rem;
}

.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary-blue);
  box-shadow: 0 0 0 2px rgba(26, 115, 232, 0.2);
}

.instruction-image-container {
  width: 100%;
  margin: 0 auto;
  background-color: var(--light-blue);
  border-radius: 8px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 15px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.instruction-image-container img {
  width: 100%;
  height: auto;
  object-fit: contain;
  border-radius: 4px;
}

/* Banner样式 */
.banner {
  width: 100%;
  background-color: var(--light-blue);
  overflow: hidden;
  margin-bottom: 30px;
}

.banner-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0;
  position: relative;
}

.banner-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
  display: block;
}

.banner-text {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: var(--white);
  text-align: center;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
}

.banner-text h1 {
  font-size: 2rem;
  margin-bottom: 10px;
}

.banner-text p {
  font-size: 1.1rem;
}
}

footer {
  background-color: var(--dark-blue);
  color: var(--white);
  padding: 30px 0;
  margin-top: 60px;
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 30px 0;
}

.footer-content p {
  margin: 5px 0;
  font-size: 24px;
}

@media (max-width: 768px) {
  .navbar {
    flex-direction: column;
    padding: 15px;
  }

  .nav-links {
    margin-top: 15px;
  }

  .nav-links li {
    margin: 0 10px;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .section-title {
    font-size: 1.7rem;
  }
}

@media (max-width: 480px) {
  .card-container {
    grid-template-columns: 1fr;
  }

  .hero h1 {
    font-size: 1.8rem;
  }

  .hero p {
    font-size: 1rem;
  }

  .medicine-name {
    font-size: 1.5rem;
  }
}