/* 辅行诀学习网站 - 响应式样式 */
:root {
  --bg-color: #f5f1e8;
  --bg-paper: #fdfaf2;
  --text-color: #3a2f23;
  --accent: #8b3a2f;
  --accent-light: #a85a4a;
  --border: #d4c5a9;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Serif SC", "Songti SC",
    serif;
  background: var(--bg-color);
  color: var(--text-color);
  line-height: 1.8;
  min-height: 100vh;
}

/* 顶部导航 */
.navbar {
  background: var(--accent);
  color: #fff;
  padding: 12px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 100;
}

.navbar .logo {
  font-size: 1.3rem;
  font-weight: bold;
  letter-spacing: 2px;
}

.navbar .nav-links {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.navbar a {
  color: #fff;
  text-decoration: none;
  padding: 6px 14px;
  border-radius: 6px;
  font-size: 0.95rem;
  transition: background 0.2s;
}

.navbar a:hover,
.navbar a.active {
  background: rgba(255, 255, 255, 0.2);
}

/* 主容器 */
.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 24px 16px 60px;
}

.page-title {
  text-align: center;
  font-size: 1.8rem;
  margin-bottom: 8px;
  color: var(--accent);
}

.page-subtitle {
  text-align: center;
  color: #8a7a66;
  margin-bottom: 28px;
  font-size: 0.95rem;
}

/* 首页章节按钮网格 */
.chapter-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
}

.chapter-btn {
  display: block;
  background: var(--bg-paper);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px 16px;
  text-align: center;
  text-decoration: none;
  color: var(--text-color);
  font-size: 1.1rem;
  font-weight: bold;
  letter-spacing: 2px;
  transition: all 0.2s;
  box-shadow: var(--shadow);
  cursor: pointer;
}

.chapter-btn:hover {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
  transform: translateY(-2px);
}

.chapter-btn .sub {
  display: block;
  font-size: 0.75rem;
  font-weight: normal;
  opacity: 0.7;
  margin-top: 6px;
  letter-spacing: 1px;
}

/* 章节阅读页 */
.reader-header {
  background: var(--bg-paper);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 20px;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
}

.reader-title {
  font-size: 1.4rem;
  color: var(--accent);
  font-weight: bold;
}

.reader-nav {
  display: flex;
  gap: 8px;
}

.btn {
  padding: 8px 16px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text-color);
  text-decoration: none;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.2s;
}

.btn:hover {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.btn-primary:hover {
  background: var(--accent-light);
}

.content-card {
  background: var(--bg-paper);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px 24px;
  box-shadow: var(--shadow);
  font-size: 1.05rem;
  line-height: 2;
}

.content-card h2,
.content-card h3 {
  color: var(--accent);
  margin: 20px 0 12px;
  padding-bottom: 8px;
  border-bottom: 1px dashed var(--border);
}

.content-card p {
  margin-bottom: 14px;
  text-indent: 2em;
}

.content-card strong {
  color: var(--accent);
}

/* 棕色加粗：特定药味行、五窍方名等 */
.brown-bold {
  color: #8b4513;
  font-weight: bold;
}

/* AI 分析页 */
.ai-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 20px;
}

.organ-column {
  background: var(--bg-paper);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  box-shadow: var(--shadow);
}

.organ-column h3 {
  text-align: center;
  color: var(--accent);
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--border);
}

.organ-item {
  margin-bottom: 18px;
}

.organ-name {
  font-size: 1.15rem;
  font-weight: bold;
  color: var(--accent);
  margin-bottom: 8px;
}

.radio-group {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.radio-group label {
  flex: 1;
  min-width: 60px;
  text-align: center;
  padding: 8px 4px;
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.9rem;
  transition: all 0.2s;
  background: #fff;
}

.radio-group input[type="radio"] {
  display: none;
}

.radio-group input[type="radio"]:checked + span {
  color: #fff;
}

.radio-group label:has(input[type="radio"]:checked) {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.symptoms-section {
  background: var(--bg-paper);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  box-shadow: var(--shadow);
  margin-bottom: 20px;
}

.symptoms-section label {
  display: block;
  font-weight: bold;
  color: var(--accent);
  margin-bottom: 10px;
}

.symptoms-section textarea {
  width: 100%;
  min-height: 100px;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-family: inherit;
  font-size: 0.95rem;
  resize: vertical;
  background: #fff;
  color: var(--text-color);
}

.submit-area {
  text-align: center;
  margin-bottom: 20px;
}

.submit-area button {
  padding: 14px 48px;
  font-size: 1.1rem;
  border: none;
}

.result-box {
  background: var(--bg-paper);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  box-shadow: var(--shadow);
  min-height: 80px;
  white-space: pre-wrap;
  line-height: 1.9;
  display: none;
}

.result-box.show {
  display: block;
}

.loading {
  text-align: center;
  color: #8a7a66;
  padding: 20px;
}

/* 传承介绍页 */
.about-card {
  background: var(--bg-paper);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px 28px;
  box-shadow: var(--shadow);
  text-align: center;
}

.about-text {
  font-size: 1.1rem;
  line-height: 2.2;
  margin-bottom: 28px;
  text-align: left;
  text-indent: 2em;
}

.qr-wrapper {
  margin-top: 20px;
  text-align: center;
}

.qr-wrapper img {
  max-width: 220px;
  width: 60%;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px;
  background: #fff;
  box-shadow: var(--shadow);
}

.qr-caption {
  margin-top: 12px;
  color: #8a7a66;
  font-size: 0.9rem;
}

/* 响应式 - 手机 */
@media (max-width: 640px) {
  .navbar {
    padding: 10px 12px;
  }
  .navbar .logo {
    font-size: 1.1rem;
    width: 100%;
    margin-bottom: 6px;
    text-align: center;
  }
  .navbar .nav-links {
    width: 100%;
    justify-content: center;
  }
  .navbar a {
    padding: 5px 10px;
    font-size: 0.85rem;
  }
  .container {
    padding: 16px 12px 40px;
  }
  .page-title {
    font-size: 1.4rem;
  }
  .chapter-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }
  .chapter-btn {
    padding: 20px 10px;
    font-size: 1rem;
    letter-spacing: 1px;
  }
  .ai-layout {
    grid-template-columns: 1fr;
  }
  .content-card {
    padding: 18px 14px;
    font-size: 1rem;
  }
  .reader-header {
    padding: 12px 14px;
  }
  .reader-title {
    font-size: 1.15rem;
  }
  .submit-area button {
    padding: 12px 32px;
    font-size: 1rem;
    width: 100%;
  }
}