/* ==== 基础变量 ==== */
:root {
    --bg-dark: #1a1a1a;          /* 主背景 - 深灰 */
    --bg-card: #2d2d2d;          /* 卡片背景 - 暖灰 */
    --text-primary: #f0ede5;     /* 主文字 - 米白 */
    --accent: #fff3c2;           /* 强调色 - 淡金 */
    --accent-dark: #e5d8a0;      /* 强调色深色 */
    --border-dark: #404040;      /* 边框颜色 */
    --gradient-start: #242424;   /* 渐变起始 */
    --gradient-end: #191919;     /* 渐变结束 */
    --title-color: #f5f3e4;       /* 月牙白 */
    --title-glow: rgba(245, 243, 228, 0.5); /* 光晕颜色 */
}

/* 清除所有链接的默认样式 */
a {
  color: inherit; /* 继承父级颜色 */
  text-decoration: none; /* 移除下划线 */
}
/* 文章列表页标题样式 */
.post-list .post-title a {
  color: var(--title-color); /* 使用月牙白变量 */
  transition: all 0.3s ease;
  display: inline-block; /* 保证动画效果 */
}

/* 悬停效果 */
.post-list .post-title a:hover {
  text-shadow: 0 0 15px var(--title-glow),
               0 0 30px var(--title-glow),
               0 0 45px var(--title-glow);
  transform: translateX(10px);
}

/* 覆盖所有浏览器引擎的默认链接样式 */
a:-webkit-any-link,
a:-moz-any-link {
  color: inherit;
  text-decoration: none;
}

/* ==== 全局样式 ==== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Noto Sans SC', sans-serif;
}

body {
  background: linear-gradient(
    135deg,
    var(--gradient-start),
    var(--gradient-end)
  );
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.6;
  display: flex;
  flex-direction: column;
}

/* ==== 导航栏 ==== */
.main-nav {
  background: rgba(10, 10, 10, 0.95);
  backdrop-filter: blur(12px);
  padding: 0.5rem 0;
  position: sticky;
  top: 0;
  z-index: 1000;
  border-bottom: 1px solid var(--border-dark);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 1.5rem;
}

.brand {
  font-size: 1.5rem;
  color: var(--accent);
  text-decoration: none;
  transition: all 0.3s ease;
  text-shadow: 0 0 15px rgba(255, 243, 194, 0.3);
}

.nav-links a {
  color: var(--text-primary);
  text-decoration: none;
  margin-left: 1rem;
  padding: 0.5rem 1rem;
  border-radius: 6px;
  transition: all 0.3s ease;
}

.nav-links a:hover {
  background: rgba(255, 243, 194, 0.1);
  color: var(--accent);
}

/* ==== 内容容器 ==== */
.content-wrapper {
  flex: 1;
  padding: 3rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
}

/* ==== 文章卡片 ==== */
.post-card {
  background: var(--bg-card);
  border-radius: 16px;
  padding: 2.5rem;
  margin: 2rem 0;
  border: 1px solid var(--border-dark);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  transition: transform 0.3s ease;
}

.post-card:hover {
  transform: translateY(-5px);
}

.post-title {
    color: var(--title-color);
    margin-bottom: 1.5rem;
    font-size: 2.2rem;
    border-left: 4px solid var(--title-color);
    padding-left: 1rem;
    transition: all 0.3s ease;
    position: relative;
}

/* 鼠标悬停光晕效果 */
.post-title:hover {
  text-shadow: 0 0 15px var(--title-glow),
               0 0 30px var(--title-glow),
               0 0 45px var(--title-glow);
  transform: translateX(10px);
}

/* 悬停时左侧装饰线动画 */
.post-title::after {
  content: '';
  position: absolute;
  left: -4px;
  top: 0;
  height: 100%;
  width: 4px;
  background: var(--title-color);
  transition: all 0.3s ease;
}

.post-title:hover::after {
  left: -10px;
  width: 6px;
  background: linear-gradient(
    to bottom,
    transparent 0%,
    var(--title-color) 30%,
    var(--title-color) 70%,
    transparent 100%
  );
}

/* 消息提示 */
.message-container {
  margin: 1rem 0;
}

.alert {
  padding: 1rem;
  border-radius: 6px;
  margin: 1rem 0;
}

.alert-success {
  background: #d4edda;
  color: #155724;
  border: 1px solid #c3e6cb;
}

.alert-error {
  background: #f8d7da;
  color: #721c24;
  border: 1px solid #f5c6cb;
}

/* 评论区域 */
.comments {
  margin-top: 3rem;
}

.comment {
  background: var(--bg-card);
  padding: 1.5rem;
  margin: 1.5rem 0;
  border-radius: 8px;
  border: 1px solid var(--border-dark);
}

.child-comment {
  margin-left: 3rem;
  border-left: 2px solid var(--accent);
  padding-left: 1rem;
}

.reply-btn {
  background: none;
  border: none;
  color: var(--accent);
  cursor: pointer;
  padding: 0.2rem 0.5rem;
}

.comment-form {
  margin: 2rem 0;
  background: var(--bg-card);
  padding: 2rem;
  border-radius: 8px;
}

.form-group {
  margin-bottom: 1rem;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.8rem;
  border: 1px solid var(--border-dark);
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
}


/* ==== 主题切换 ==== */
.theme-switch {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 9999;
}

#themeToggle {
  background: var(--bg-card);
  border: 1px solid var(--border-dark);
  width: 3.5rem;
  height: 3.5rem;
  border-radius: 50%;
  cursor: pointer;
  color: var(--accent);
  box-shadow: 0 8px 24px rgba(0,0,0,0.3);
  transition: all 0.3s ease;
}

#themeToggle:hover {
  transform: rotate(180deg) scale(1.1);
}

/* ==== 亮色主题 ==== */
.light-theme {
    --title-color: #4a453d;       /* 深棕 */
    --title-glow: rgba(74, 69, 61, 0.3);
    --bg-dark: #faf8f2;          /* 浅米底色 */
    --bg-card: #ffffff;          /* 纯白卡片 */
    --text-primary: #4a453d;     /* 深棕文字 */
    --accent: #d4c391;           /* 浅金色 */
    --border-dark: #e0dcd4;      /* 浅米边框 */
    --gradient-start: #f5f3ed;
    --gradient-end: #ebe7db;
      /* 增加纸质纹理效果 */
  background-image: linear-gradient(
      to right,
      var(--gradient-start) 0%,
      var(--gradient-end) 100%
    ),
    url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><rect x="98" y="98" width="2" height="2" fill="%23e0dcd4"/></svg>');
  background-blend-mode: multiply;
  background-size: cover, 10px 10px;
}
.light-theme .post-card {
  box-shadow: 0 4px 12px rgba(168, 151, 100, 0.1);
}


/* 确保 category-layout 覆盖其他样式 */
.category-layout {
    display: grid;
    grid-template-columns: 2fr 8fr; /* 强制 2:8 比例 */
    gap: 2rem;
    padding: 2rem;
    max-width: 1200px;
    margin: 0 auto;
    min-height: 80vh;
    width: 100%;
}

/* 分类菜单样式 */
.category-sidebar {
    background: var(--bg-card);
    border-radius: 12px;
    padding: 1.5rem;
    height: fit-content;
    position: sticky;
    top: 5rem; /* 避开导航栏 */
    max-height: calc(100vh - 6rem); /* 限制高度 */
    overflow-y: auto; /* 支持滚动 */
}

.sidebar-title {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    border-bottom: 2px solid var(--accent);
    padding-bottom: 0.5rem;
}

.category-node {
    margin-bottom: 0.5rem;
}

.category-header {
    cursor: pointer;
    padding: 0.8rem;
    border-radius: 6px;
    display: flex;
    align-items: center;
    transition: all 0.2s ease;
}

.category-header:hover {
    background: rgba(255, 243, 194, 0.1);
}

.toggle-icon {
    margin-right: 0.8rem;
    font-size: 0.8em;
    transition: transform 0.2s ease;
}

.post-list {
    padding-left: 1.5rem;
    margin: 0.5rem 0;
}

.post-link {
    display: block;
    padding: 0.6rem;
    margin: 0.3rem 0;
    border-radius: 4px;
    color: var(--text-primary);
    transition: all 0.2s ease;
}

.post-link:hover {
    background: rgba(255, 243, 194, 0.05);
    transform: translateX(5px);
}

/* 内容区域样式 */
.category-content {
    background: var(--bg-card);
    border-radius: 12px;
    padding: 2rem;
    min-height: 80vh;
    width: 100%;
}

.content-placeholder {
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    opacity: 0.6;
}

.loading {
    text-align: center;
    padding: 2rem;
}

.error-message {
    color: #ff6b6b;
    padding: 2rem;
    text-align: center;
}

/* 覆盖可能的干扰样式 */
.content-wrapper {
    padding: 0; /* 移除 base.html 中的默认 padding */
}

/* 暗色模式适配 */
.light-theme .category-sidebar,
.light-theme .category-content {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.light-theme .post-link:hover {
    background: rgba(0, 0, 0, 0.03);
}

/* 搜索表单样式 */
.search-form {
    display: flex;
    align-items: center;
    margin-right: 1rem;
}

.search-input {
    padding: 0.5rem;
    border: 1px solid var(--border-dark);
    border-radius: 4px 0 0 4px;
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    outline: none;
    width: 150px;
    transition: width 0.3s ease;
}

.search-input:focus {
    width: 200px;
}

.search-button {
    background: var(--accent);
    border: 1px solid var(--accent);
    border-radius: 0 4px 4px 0;
    padding: 0.5rem;
    cursor: pointer;
    color: var(--bg-dark);
    transition: background 0.3s ease;
}

.search-button:hover {
    background: var(--accent-dark);
}


/* AI 助手页面容器 */
.chat-container {
    max-width: 800px;
    margin: 3rem auto;
    background: var(--bg-card);
    border-radius: 12px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    display: flex;
    flex-direction: column;
    height: 80vh;
}

.chat-header {
    padding: 1rem;
    border-bottom: 1px solid var(--border-dark);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.chat-header h3 {
    margin: 0;
    color: var(--text-primary);
}

.close-btn {
    background: none;
    border: none;
    color: var(--accent);
    cursor: pointer;
    font-size: 1.2rem;
    text-decoration: none;
}

.chat-messages {
    flex: 1;
    padding: 1rem;
    overflow-y: auto;
    color: var(--text-primary);
    background: var(--bg-card) !important;
    visibility: visible !important;
    opacity: 1 !important;
    display: block !important;
}

.chat-messages .message {
    margin-bottom: 1rem;
    padding: 0.8rem;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.05) !important;
    max-width: 80%;
    visibility: visible !important;
    opacity: 1 !important;
    display: block !important;
}

.chat-messages .user-message {
    background: var(--accent-dark);
    color: var(--bg-dark);
    margin-left: auto;
    visibility: visible !important;
    opacity: 1 !important;
    display: block !important;
}

.loading-content {
    color: var(--text-primary) !important;
    font-style: italic;
    display: block !important;
    visibility: visible !important;
    opacity: 1 !important;
    background: transparent !important;
}

.reasoning-content {
    color: var(--text-primary) !important;
    font-style: normal !important;
    display: block !important;
    white-space: pre-wrap !important;
    visibility: visible !important;
    opacity: 1 !important;
    background: transparent !important;
}

.answer-content {
    color: var(--text-primary) !important;
    display: block !important;
    white-space: pre-wrap !important;
    visibility: visible !important;
    opacity: 1 !important;
    background: transparent !important;
}

.chat-input {
    padding: 1rem;
    border-top: 1px solid var(--border-dark);
    display: flex;
    gap: 1rem;
    visibility: visible !important;
    opacity: 1 !important;
}

.chat-input textarea {
    flex: 1;
    padding: 0.8rem;
    border: 1px solid var(--border-dark);
    border-radius: 4px;
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    resize: none;
    visibility: visible !important;
    opacity: 1 !important;
}

.chat-input button {
    background: var(--accent);
    border: none;
    padding: 0.8rem 1.2rem;
    border-radius: 4px;
    color: var(--bg-dark);
    cursor: pointer;
    transition: background 0.3s ease;
    visibility: visible !important;
    opacity: 1 !important;
}

.chat-input button:hover {
    background: var(--accent-dark);
}