:root {
  --primary-color: #2196f3;
  --secondary-color: #64b5f6;
  --text-color: #e0e0e0;
  --bg-color: #121212;
  --input-bg-color: #1e1e1e;
  --button-hover-color: #1976d2;
  --delete-button-color: #f44336;
  --accent-color: #ff9800;
  --border-color: #424242;
}

body {
  font-family: 'Roboto', sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  margin: 0;
  padding: 0;
}

.container {
  max-width: 960px;
  margin: 60px auto;
  padding: 40px;
  background-color: #1e1e1e;
  border-radius: 12px;
  box-shadow: 0 6px 10px rgba(0, 0, 0, 0.2);
  border: 2px solid var(--border-color);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.container:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.3);
}

h1 {
  text-align: center;
  color: var(--primary-color);
  font-size: 48px;
  margin-bottom: 60px;
  text-transform: uppercase;
  letter-spacing: 3px;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
  transition: color 0.3s ease, text-shadow 0.3s ease;
}

h1:hover {
  color: var(--accent-color);
  text-shadow: 3px 3px 6px rgba(0, 0, 0, 0.4);
}

.form-group {
  margin-bottom: 30px;
}

label {
  display: block;
  font-weight: 500;
  margin-bottom: 10px;
  color: var(--text-color);
  font-size: 18px;
  text-transform: uppercase;
  letter-spacing: 1px;
  transition: color 0.3s ease;
}

label:hover {
  color: var(--accent-color);
}

input[type="text"],
select,
textarea {
  width: 100%;
  padding: 15px;
  border: none;
  border-radius: 8px;
  background-color: var(--input-bg-color);
  color: var(--text-color);
  font-size: 16px;
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.1);
  transition: box-shadow 0.3s ease, background-color 0.3s ease;
}

input[type="text"]:focus,
select:focus,
textarea:focus {
  outline: none;
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.1), 0 0 0 2px var(--secondary-color);
  background-color: #2d2d2d;
}

button {
  padding: 15px 30px;
  background-color: var(--primary-color);
  color: #fff;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: background-color 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
  font-size: 18px;
  text-transform: uppercase;
  letter-spacing: 2px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

button:hover {
  background-color: var(--button-hover-color);
  transform: translateY(-2px);
  box-shadow: 0 6px 8px rgba(0, 0, 0, 0.2);
}

button:active {
  transform: translateY(0);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

#outline-container,
#content-container,
#key-word-container,
#search-result-container {
  margin-top: 60px;
  border: 2px solid var(--border-color);
  border-radius: 12px;
  padding: 30px;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

#outline-container:hover,
#content-container:hover,
#key-word-container:hover,
#search-result-container:hover {
  border-color: var(--accent-color);
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

h2 {
  color: var(--secondary-color);
  font-size: 36px;
  margin-bottom: 30px;
  text-transform: uppercase;
  letter-spacing: 2px;
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.2);
  position: relative;
  display: inline-block;
  transition: color 0.3s ease, text-shadow 0.3s ease;
}

h2::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--accent-color);
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

h2:hover {
  color: var(--accent-color);
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

h2:hover::after {
  transform: scaleX(1);
}

#outline,
#content,
#search-result {
  width: 100%;
  min-height: 300px;
  padding: 20px;
  border: none;
  border-radius: 8px;
  background-color: var(--input-bg-color);
  color: var(--text-color);
  font-size: 16px;
  line-height: 1.8;
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.1);
  resize: vertical;
  transition: box-shadow 0.3s ease, background-color 0.3s ease;
}

#outline:focus,
#content:focus,
#search-result:focus {
  outline: none;
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.1), 0 0 0 2px var(--secondary-color);
  background-color: #2d2d2d;
}

.key-word-button {
  display: inline-block;
  margin: 5px;
  padding: 8px 16px;
  background-color: #424242;
  border: none;
  border-radius: 20px;
  cursor: pointer;
  color: var(--text-color);
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 1px;
  transition: background-color 0.3s ease, transform 0.3s ease, color 0.3s ease;
}

.key-word-button:hover {
  background-color: var(--secondary-color);
  transform: translateY(-2px);
  color: #fff;
}

.key-word-button.selected {
  background-color: var(--primary-color);
  color: #fff;
}

.delete-button {
  background-color: var(--delete-button-color);
  color: #fff;
  border: none;
  border-radius: 50%;
  width: 24px;
  height: 24px;
  line-height: 24px;
  text-align: center;
  font-size: 14px;
  cursor: pointer;
  margin-left: 8px;
  transition: background-color 0.3s ease, transform 0.3s ease;
}

.delete-button:hover {
  background-color: #d32f2f;
  transform: scale(1.1);
}

#qa-result-container {
  margin-top: 40px;
  padding: 30px;
  background-color: var(--input-bg-color);
  border-radius: 8px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  border: 2px solid var(--border-color);
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

#qa-result-container:hover {
  border-color: var(--accent-color);
  box-shadow: 0 6px 8px rgba(0, 0, 0, 0.2);
}

.qa-item {
  margin-bottom: 40px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-color);
  transition: border-color 0.3s ease;
}

.qa-item:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: none;
}

.qa-item:hover {
  border-color: var(--accent-color);
}

.qa-item h3 {
  color: var(--accent-color);
  font-size: 24px;
  margin-bottom: 15px;
  text-transform: uppercase;
  letter-spacing: 1px;
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.2);
  transition: color 0.3s ease, text-shadow 0.3s ease;
}

.qa-item h3:hover {
  color: var(--secondary-color);
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.qa-item p {
  color: var(--text-color);
  font-size: 16px;
  line-height: 1.8;
  transition: color 0.3s ease;
}

.qa-item p:hover {
  color: #fff;
}

/* 动画效果 */
@keyframes fadeIn {
  0% {
    opacity: 0;
    transform: translateY(20px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

.container {
  animation: fadeIn 0.6s ease;
}

@keyframes slideIn {
  0% {
    opacity: 0;
    transform: translateX(-20px);
  }
  100% {
    opacity: 1;
    transform: translateX(0);
  }
}

h1, h2, .form-group, #outline-container, #content-container, #key-word-container, #search-result-container, #qa-result-container {
  animation: slideIn 0.6s ease;
}

/* 响应式设计 */
@media screen and (max-width: 1024px) {
  .container {
    max-width: 90%;
    padding: 30px;
  }
  
  h1 {
    font-size: 36px;
    margin-bottom: 40px;
  }
  
  h2 {
    font-size: 30px;
    margin-bottom: 20px;
  }
  
  input[type="text"],
  select,
  textarea {
    font-size: 14px;
  }
  
  button {
    font-size: 16px;
    padding: 12px 24px;
  }
  
  .qa-item h3 {
    font-size: 20px;
  }
  
  .qa-item p {
    font-size: 14px;
  }
}

@media screen and (max-width: 768px) {
  .container {
    margin: 30px auto;
    padding: 20px;
  }
  
  h1 {
    font-size: 30px;
    margin-bottom: 30px;
  }
  
  h2 {
    font-size: 24px;
    margin-bottom: 15px;
  }
  
  input[type="text"],
  select,
  textarea {
    padding: 10px;
    font-size: 12px;
  }
  
  button {
    font-size: 14px;
    padding: 10px 20px;
  }
  
  .qa-item h3 {
    font-size: 18px;
  }
  
  .qa-item p {
    font-size: 12px;
  }
}