/* ============================================
   网站前端样式 - 现代化设计
   ============================================ */

/* CSS 变量 - 亮色模式（默认） */
:root {
  --primary: #6366f1;
  --primary-dark: #4f46e5;
  --primary-light: #a5b4fc;
  --primary-bg: #eef2ff;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --info: #3b82f6;
  --dark: #1e293b;
  --gray-50: #f8fafc;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-400: #94a3b8;
  --gray-500: #64748b;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1e293b;
  --gray-900: #0f172a;
  --bg-primary: #ffffff;
  --bg-secondary: var(--gray-50);
  --bg-card: #ffffff;
  --text-primary: var(--gray-800);
  --text-secondary: var(--gray-600);
  --text-muted: var(--gray-400);
  --border-color: var(--gray-200);
  --border-light: rgba(0, 0, 0, 0.04);
  --header-bg: rgba(255, 255, 255, 0.9);
  --footer-bg: var(--gray-100);
  --code-bg: #f4f4f5;
  --skeleton-base: #e2e8f0;
  --skeleton-shine: #f1f5f9;
  --overlay-bg: rgba(0, 0, 0, 0.5);
  --border-radius: 12px;
  --border-radius-sm: 8px;
  --border-radius-lg: 16px;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.15);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* CSS 变量 - 暗色模式 */
[data-theme="dark"] {
  --primary: #818cf8;
  --primary-dark: #6366f1;
  --primary-light: #a5b4fc;
  --primary-bg: #1e1b4b;
  --success: #34d399;
  --warning: #fbbf24;
  --danger: #f87171;
  --info: #60a5fa;
  --dark: #f1f5f9;
  --gray-50: #0f172a;
  --gray-100: #1e293b;
  --gray-200: #334155;
  --gray-300: #475569;
  --gray-400: #64748b;
  --gray-500: #94a3b8;
  --gray-600: #cbd5e1;
  --gray-700: #e2e8f0;
  --gray-800: #f1f5f9;
  --gray-900: #f8fafc;
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-card: #1e293b;
  --text-primary: #f1f5f9;
  --text-secondary: #cbd5e1;
  --text-muted: #64748b;
  --border-color: #334155;
  --border-light: rgba(255, 255, 255, 0.06);
  --header-bg: rgba(15, 23, 42, 0.95);
  --footer-bg: #1e293b;
  --code-bg: #1e293b;
  --skeleton-base: #334155;
  --skeleton-shine: #475569;
  --overlay-bg: rgba(0, 0, 0, 0.7);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3), 0 1px 2px rgba(0, 0, 0, 0.2);
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -2px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.4), 0 10px 10px -5px rgba(0, 0, 0, 0.2);
  --shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

/* 全局重置 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  line-height: 1.7;
  color: var(--text-primary);
  background-color: var(--bg-secondary);
  background-size: cover;
  background-attachment: fixed;
  background-position: center;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: var(--primary-dark);
  text-decoration: none;
}

::selection {
  background: var(--primary);
  color: #fff;
}

/* ============================================
   头部导航
   ============================================ */
header {
  background: var(--header-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
  position: sticky;
  top: 0;
  z-index: 1000;
  border-bottom: 1px solid var(--border-light);
}

nav {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 68px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo a {
  font-size: 22px;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary), #8b5cf6);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.5px;
}

.logo img.site-logo {
  height: 40px;
  width: auto;
}

.nav-links {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-links > li > a:not(.dropdown-toggle) {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 15px;
  padding: 8px 16px;
  border-radius: var(--border-radius-sm);
  transition: var(--transition);
}

.nav-links > li > a:not(.dropdown-toggle):hover {
  color: var(--primary);
  background: var(--primary-bg);
  text-decoration: none;
}

/* ============================================
   用户下拉菜单
   ============================================ */
.user-dropdown {
  position: relative;
}

.user-dropdown .dropdown-toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border: 1px solid var(--border-color);
  border-radius: 999px;
  background: var(--bg-card);
  cursor: pointer;
  user-select: none;
  color: var(--text-primary);
  font-size: 14px;
  font-weight: 500;
  transition: var(--transition);
  text-decoration: none;
}

.user-dropdown .dropdown-toggle:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--primary-bg);
  text-decoration: none;
}

/* 伪元素桥接：覆盖 toggle 与菜单之间的空隙，确保鼠标移动路径连续 */
.user-dropdown::before {
  content: '';
  position: absolute;
  top: 100%;
  right: 0;
  left: 0;
  height: 12px;
  z-index: 1999;
  pointer-events: auto;
}

.dropdown-menu {
  display: none;
  position: absolute;
  top: calc(100% + 12px);
  right: 0;
  min-width: 200px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-lg);
  z-index: 2000;
  padding: 6px;
  list-style: none;
  animation: dropdownIn 0.2s ease;
}

@keyframes dropdownIn {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

.user-dropdown:hover .dropdown-menu {
  display: block;
}

.dropdown-menu li { margin: 0; }

.dropdown-menu li a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  color: var(--gray-600);
  font-size: 14px;
  border-radius: 6px;
  transition: var(--transition);
  white-space: nowrap;
}

.dropdown-menu li a:hover {
  background: var(--gray-100);
  color: var(--primary);
  text-decoration: none;
}

.dropdown-divider {
  height: 1px;
  background: var(--gray-200);
  margin: 4px 6px;
}

/* ============================================
   主要内容区
   ============================================ */
main {
  flex: 1;
  max-width: 1200px;
  margin: 0 auto;
  padding: 32px 24px;
  width: 100%;
}

.container {
  background: #fff;
  border-radius: var(--border-radius-lg);
  padding: 36px;
  box-shadow: var(--shadow);
  border: 1px solid rgba(0, 0, 0, 0.04);
  transition: var(--transition);
}

h1, h2, h3, h4 {
  color: var(--gray-800);
  line-height: 1.3;
}

h1 {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 2px solid var(--gray-100);
  letter-spacing: -0.3px;
}

h2 {
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 20px;
  margin-top: 32px;
}

h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 12px;
}

/* ============================================
   欢迎区 / Hero
   ============================================ */
.hero-section {
  text-align: center;
  padding: 48px 20px 32px;
  margin-bottom: 0;
}

.hero-section h1 {
  border: none;
  font-size: 36px;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary), #8b5cf6);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 16px;
  padding: 0;
}

.site-description {
  color: var(--gray-500);
  font-size: 18px;
  max-width: 600px;
  margin: 0 auto;
}

/* ============================================
   文章列表
   ============================================ */
.article-list { margin: 0; }

.article-item {
  display: flex;
  gap: 24px;
  padding: 20px 8px;
  border-bottom: 1px solid var(--gray-100);
  align-items: flex-start;
  transition: var(--transition);
  border-radius: var(--border-radius-sm);
  margin: 0 -8px;
}

.article-item:hover { background: var(--gray-50); }

.article-item:last-child { border-bottom: none; }

.article-thumb {
  width: 140px;
  height: 96px;
  flex-shrink: 0;
  border-radius: var(--border-radius-sm);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.article-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition);
}

.article-item:hover .article-thumb img { transform: scale(1.05); }

.article-info { flex: 1; min-width: 0; }

.article-info h3 { font-size: 18px; margin-bottom: 8px; }

.article-info h3 a {
  color: var(--gray-800);
  transition: var(--transition);
}

.article-info h3 a:hover { color: var(--primary); }

.article-info .meta {
  font-size: 14px;
  color: var(--gray-400);
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.section-footer {
  margin-top: 24px;
  text-align: center;
}

/* ============================================
   文章卡片
   ============================================ */
.article-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
  margin: 24px 0;
}

.article-card {
  background: #fff;
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  border: 1px solid var(--gray-100);
  transition: var(--transition);
}

.article-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.article-cover {
  height: 200px;
  overflow: hidden;
  background: var(--gray-100);
}

.article-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.article-card:hover .article-cover img { transform: scale(1.08); }

.article-card .article-content { padding: 24px; }

.article-card h3 { font-size: 18px; margin-bottom: 8px; }

.article-card h3 a {
  color: var(--gray-800);
  transition: var(--transition);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-card h3 a:hover { color: var(--primary); }

.article-card .meta {
  font-size: 13px;
  color: var(--gray-400);
  margin-bottom: 16px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.my-article { border-left: 4px solid var(--primary) !important; }

.my-articles-section {
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 2px solid var(--gray-100);
}

.my-articles-section h2 {
  color: var(--primary);
  margin-bottom: 16px;
  font-size: 20px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.article-card-actions {
  margin-top: 16px;
  display: flex;
  gap: 8px;
}

.article-actions { margin-bottom: 24px; }

/* ============================================
   文章详情
   ============================================ */
.article-detail { max-width: 800px; margin: 0 auto; }

.article-detail h1 {
  border: none;
  padding: 0;
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 16px;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  color: var(--gray-500);
  font-size: 14px;
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--gray-100);
}

.article-meta span {
  display: flex;
  align-items: center;
  gap: 4px;
}

.article-cover-large {
  margin-bottom: 28px;
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.article-cover-large img { width: 100%; display: block; }

.article-body {
  line-height: 1.9;
  font-size: 16px;
  color: var(--gray-700);
}

.article-body p { margin-bottom: 18px; }

.article-body img {
  max-width: 100%;
  border-radius: var(--border-radius-sm);
  margin: 16px 0;
  box-shadow: var(--shadow);
}

.article-body blockquote {
  border-left: 4px solid var(--primary);
  padding: 16px 24px;
  margin: 24px 0;
  background: var(--gray-50);
  border-radius: 0 var(--border-radius-sm) var(--border-radius-sm) 0;
  color: var(--gray-600);
}

.article-body pre {
  background: var(--gray-800);
  color: #e2e8f0;
  padding: 20px;
  border-radius: var(--border-radius-sm);
  overflow-x: auto;
  margin: 20px 0;
  font-size: 14px;
  line-height: 1.6;
}

.article-body code {
  background: var(--gray-100);
  padding: 3px 8px;
  border-radius: 4px;
  font-size: 14px;
  color: var(--primary-dark);
}

.article-body pre code {
  background: transparent;
  padding: 0;
  color: inherit;
}

.article-body ul, .article-body ol {
  margin: 16px 0;
  padding-left: 24px;
}

.article-body li { margin-bottom: 8px; }

.article-footer {
  margin-top: 36px;
  padding-top: 24px;
  border-top: 1px solid var(--gray-100);
  display: flex;
  gap: 12px;
}

/* ============================================
   页面内容
   ============================================ */
.page-content { max-width: 900px; margin: 0 auto; }

.page-body {
  line-height: 1.9;
  font-size: 16px;
  margin-top: 24px;
  color: var(--gray-700);
}

.page-body p { margin-bottom: 16px; }

.page-body img {
  max-width: 100%;
  border-radius: var(--border-radius-sm);
  margin: 16px 0;
}

.page-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
}

.page-body th, .page-body td {
  border: 1px solid var(--gray-200);
  padding: 12px 16px;
  text-align: left;
}

.page-body th {
  background: var(--gray-50);
  font-weight: 600;
}

.page-body blockquote {
  border-left: 4px solid var(--primary);
  padding: 16px 24px;
  margin: 20px 0;
  background: var(--gray-50);
  border-radius: 0 var(--border-radius-sm) var(--border-radius-sm) 0;
}

.page-body pre {
  background: var(--gray-800);
  color: #e2e8f0;
  padding: 20px;
  border-radius: var(--border-radius-sm);
  overflow-x: auto;
  margin: 20px 0;
}

.page-body code {
  background: var(--gray-100);
  padding: 3px 8px;
  border-radius: 4px;
  font-size: 14px;
}

.page-footer {
  margin-top: 36px;
  padding-top: 24px;
  border-top: 1px solid var(--gray-100);
}

/* ============================================
   图片画廊
   ============================================ */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 20px;
  margin: 24px 0;
}

.gallery-item {
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  cursor: pointer;
  transition: var(--transition);
  position: relative;
  background: #fff;
  border: 1px solid var(--gray-100);
}

.gallery-item:hover {
  transform: translateY(-4px) scale(1.02);
  box-shadow: var(--shadow-lg);
}

.gallery-item img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  display: block;
  transition: transform 0.4s ease;
}

.gallery-item:hover img { transform: scale(1.05); }

.gallery-info {
  padding: 12px 16px;
  background: #fff;
}

.gallery-info p {
  font-size: 13px;
  color: var(--gray-500);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  margin: 0;
}

/* ============================================
   页面列表
   ============================================ */
.page-list {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
  margin: 24px 0;
}

.page-list li {
  background: var(--gray-50);
  border-radius: var(--border-radius-sm);
  padding: 20px;
  text-align: center;
  transition: var(--transition);
  border: 1px solid var(--gray-100);
}

.page-list li:hover {
  background: var(--primary-bg);
  transform: translateY(-2px);
  border-color: var(--primary-light);
  box-shadow: var(--shadow);
}

.page-list li a {
  display: block;
  color: var(--gray-700);
  font-weight: 500;
  font-size: 15px;
}

.page-list li:hover a { color: var(--primary); }

/* ============================================
   认证表单
   ============================================ */
.auth-form {
  max-width: 420px;
  margin: 40px auto;
  padding: 40px;
  background: #fff;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--gray-100);
}

.auth-form h1 {
  text-align: center;
  border: none;
  padding: 0;
  margin-bottom: 32px;
  font-size: 26px;
  font-weight: 700;
}

/* ============================================
   表单样式
   ============================================ */
.form-group { margin-bottom: 20px; }

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
  color: var(--gray-700);
  font-size: 14px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--gray-200);
  border-radius: var(--border-radius-sm);
  font-size: 15px;
  transition: var(--transition);
  background: #fff;
  color: var(--gray-700);
  font-family: inherit;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.12);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.form-group input:disabled {
  background: var(--gray-50);
  color: var(--gray-400);
  cursor: not-allowed;
}

.auth-links {
  text-align: center;
  margin-top: 24px;
  color: var(--gray-500);
  font-size: 14px;
}

.auth-links a {
  color: var(--primary);
  font-weight: 500;
}

/* ============================================
   按钮样式
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 24px;
  background: #fff;
  color: var(--gray-700);
  border: 1px solid var(--gray-200);
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  transition: var(--transition);
  text-decoration: none;
  font-family: inherit;
  gap: 6px;
}

.btn:hover {
  background: var(--gray-50);
  border-color: var(--gray-300);
  color: var(--gray-800);
  text-decoration: none;
}

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

.btn-primary:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  color: #fff;
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

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

.btn-success:hover {
  background: #059669;
  border-color: #059669;
  color: #fff;
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

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

.btn-warning:hover {
  background: #d97706;
  border-color: #d97706;
  color: #fff;
  box-shadow: 0 4px 12px rgba(245, 158, 11, 0.3);
}

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

.btn-danger:hover {
  background: #dc2626;
  border-color: #dc2626;
  color: #fff;
  box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
}

.btn-small { padding: 6px 14px; font-size: 13px; }

.btn-large { padding: 14px 32px; font-size: 16px; }

/* ============================================
   提示信息
   ============================================ */
.alert {
  padding: 14px 18px;
  border-radius: var(--border-radius-sm);
  margin-bottom: 20px;
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
  border: 1px solid transparent;
}

.alert-success {
  background: #ecfdf5;
  color: #065f46;
  border-color: #a7f3d0;
}

.alert-error {
  background: #fef2f2;
  color: #991b1b;
  border-color: #fecaca;
}

.alert-warning {
  background: #fffbeb;
  color: #92400e;
  border-color: #fde68a;
}

.alert-info {
  background: var(--primary-bg);
  color: #4338ca;
  border-color: var(--primary-light);
}

/* ============================================
   错误页面
   ============================================ */
.error-page {
  text-align: center;
  padding: 80px 20px;
}

.error-page h1 {
  border: none;
  font-size: 42px;
  font-weight: 800;
  margin-bottom: 20px;
}

.error-page p {
  color: var(--gray-500);
  margin-bottom: 32px;
  font-size: 16px;
}

.empty-message {
  text-align: center;
  padding: 60px 20px;
  color: var(--gray-400);
  font-size: 15px;
}

/* ============================================
   评论样式
   ============================================ */
.comments-section {
  margin-top: 48px;
  padding-top: 36px;
  border-top: 1px solid var(--gray-200);
}

.comments-section h2 {
  font-size: 22px;
  margin-bottom: 24px;
  margin-top: 0;
}

.comments-list { margin-bottom: 36px; }

.comment-item {
  display: flex;
  gap: 16px;
  padding: 20px 0;
  border-bottom: 1px solid var(--gray-100);
}

.comment-avatar, .reply-avatar { flex-shrink: 0; }

.avatar-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, var(--primary), #8b5cf6);
  color: #fff;
  border-radius: 50%;
  font-size: 18px;
  font-weight: 600;
}

.avatar-icon.small { width: 32px; height: 32px; font-size: 14px; }

.comment-body, .reply-body { flex: 1; min-width: 0; }

.comment-author { margin-bottom: 6px; }

.comment-author strong { font-size: 15px; color: var(--gray-800); }

.comment-time {
  font-size: 12px;
  color: var(--gray-400);
  margin-left: 10px;
}

.comment-text {
  font-size: 15px;
  line-height: 1.7;
  color: var(--gray-600);
  margin-bottom: 8px;
  word-break: break-word;
}

.comment-actions { font-size: 13px; }

.comment-actions a {
  color: var(--gray-400);
  cursor: pointer;
  font-weight: 500;
}

.comment-actions a:hover { color: var(--primary); }

.replies-list {
  margin-top: 14px;
  padding: 16px;
  background: var(--gray-50);
  border-radius: var(--border-radius-sm);
}

.reply-item {
  display: flex;
  gap: 10px;
  padding: 10px 0;
}

.reply-item + .reply-item {
  border-top: 1px solid var(--gray-200);
  padding-top: 14px;
}

.reply-form-container {
  margin-top: 12px;
  padding: 16px;
  background: var(--gray-50);
  border-radius: var(--border-radius-sm);
}

.reply-form-row {
  display: flex;
  gap: 10px;
  margin-bottom: 10px;
}

.reply-input {
  flex: 1;
  padding: 8px 12px;
  border: 1px solid var(--gray-200);
  border-radius: 6px;
  font-size: 13px;
}

.reply-textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--gray-200);
  border-radius: 6px;
  font-size: 13px;
  resize: vertical;
  margin-bottom: 8px;
  box-sizing: border-box;
  font-family: inherit;
}

.comment-form-wrapper {
  background: var(--gray-50);
  padding: 28px;
  border-radius: var(--border-radius);
  margin-top: 24px;
  border: 1px solid var(--gray-100);
}

.comment-form-wrapper h3 {
  margin-top: 0;
  margin-bottom: 20px;
  font-size: 18px;
}

.logged-in-as {
  margin-bottom: 16px;
  color: var(--gray-500);
  font-size: 14px;
}

.no-comments {
  text-align: center;
  color: var(--gray-400);
  padding: 40px;
  font-size: 15px;
}

/* ============================================
   灯箱样式
   ============================================ */
.lightbox-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(8px);
  z-index: 9999;
  justify-content: center;
  align-items: center;
  padding: 24px;
  box-sizing: border-box;
}

.lightbox-overlay.active { display: flex; }

.lightbox-content {
  display: flex;
  gap: 28px;
  background: #fff;
  border-radius: var(--border-radius-lg);
  max-width: 1000px;
  width: 100%;
  max-height: 90vh;
  padding: 28px;
  position: relative;
  box-shadow: var(--shadow-xl);
  animation: lightboxIn 0.3s ease;
}

@keyframes lightboxIn {
  from { opacity: 0; transform: scale(0.92); }
  to { opacity: 1; transform: scale(1); }
}

.lightbox-close {
  position: absolute;
  top: 12px;
  right: 16px;
  background: var(--gray-100);
  border: none;
  font-size: 22px;
  color: var(--gray-500);
  cursor: pointer;
  z-index: 10;
  line-height: 1;
  padding: 4px 12px;
  border-radius: 6px;
  transition: var(--transition);
}

.lightbox-close:hover {
  background: var(--gray-200);
  color: var(--gray-800);
}

.lightbox-image-wrapper {
  flex: 0 0 auto;
  width: 55%;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  overflow: hidden;
  border-radius: var(--border-radius-sm);
  background: var(--gray-100);
}

.lightbox-image-wrapper img {
  max-width: 100%;
  max-height: 70vh;
  object-fit: contain;
  border-radius: var(--border-radius-sm);
}

.lightbox-details {
  flex: 1;
  min-width: 280px;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  max-height: 70vh;
}

.lightbox-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--gray-100);
}

.lightbox-header h3 {
  font-size: 16px;
  color: var(--gray-800);
  margin: 0;
  word-break: break-all;
  flex: 1;
}

.btn-download {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  background: var(--success);
  color: #fff;
  border-radius: 6px;
  font-size: 13px;
  white-space: nowrap;
  text-decoration: none;
  transition: var(--transition);
  border: none;
}

.btn-download:hover {
  background: #059669;
  text-decoration: none;
  color: #fff;
}

.lightbox-comments { flex: 1; display: flex; flex-direction: column; }

.lightbox-comments h4 {
  font-size: 15px;
  margin-bottom: 14px;
}

.lightbox-comments .comments-list {
  flex: 1;
  overflow-y: auto;
  margin-bottom: 16px;
  max-height: 300px;
}

.comment-feedback {
  display: inline-block;
  margin-left: 10px;
  font-size: 12px;
}

.comment-feedback.success { color: var(--success); }

.comment-feedback.error { color: var(--danger); }

/* ============================================
   底部
   ============================================ */
footer {
  background: var(--footer-bg);
  color: var(--text-secondary);
  text-align: center;
  padding: 32px 20px;
  margin-top: auto;
  border-top: 1px solid var(--border-color);
  transition: background 0.3s ease, color 0.3s ease;
}

footer p { margin: 4px 0; font-size: 14px; }

footer a { color: var(--text-muted); }

footer a:hover { color: var(--text-primary); }

/* ============================================
   返回顶部按钮
   ============================================ */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 44px;
  height: 44px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  display: none;
  font-size: 20px;
  z-index: 999;
  box-shadow: var(--shadow-md);
  transition: var(--transition);
  line-height: 1;
}

.back-to-top:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

/* ============================================
   响应式设计
   ============================================ */
@media (max-width: 1024px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  nav {
    flex-direction: column;
    height: auto;
    padding: 16px 20px;
    gap: 12px;
  }

  .nav-links {
    flex-wrap: wrap;
    justify-content: center;
    gap: 6px;
  }

  .nav-links > li > a:not(.dropdown-toggle) {
    font-size: 14px;
    padding: 6px 12px;
  }

  .article-grid { grid-template-columns: 1fr; }

  .gallery-grid { grid-template-columns: repeat(2, 1fr); }

  .article-meta { flex-direction: column; gap: 6px; }

  .article-item { flex-direction: column; }

  .article-thumb {
    width: 100%;
   
  }
 
  .auth-form { padding: 28px 20px; margin: 20px 16px; }
 
  .container { padding: 24px 16px; }
 
  main { padding: 24px 16px; }
 
  h1 { font-size: 24px; }
 
  .hero-section h1 { font-size: 28px; }
 
  .lightbox-content {
    flex-direction: column;
    padding: 20px;
    max-height: 95vh;
  }
 
  .lightbox-image-wrapper { width: 100%; }
 
  .lightbox-details { max-height: none; }
 
  .page-list { grid-template-columns: repeat(2, 1fr); }
 
  .dropdown-menu { right: auto; left: 0; }
 
  .comment-form-wrapper { padding: 20px; }
 
  .replies-list { padding: 12px; }
 
  .reply-form-row { flex-direction: column; gap: 8px; }
}
 
@media (max-width: 480px) {
  .gallery-grid { grid-template-columns: 1fr; }
 
  .page-list { grid-template-columns: 1fr; }
 
  .stats-grid { grid-template-columns: 1fr; }
 
  .article-detail h1 { font-size: 24px; }
 
  .hero-section h1 { font-size: 24px; }
 
  .auth-form { padding: 24px 16px; }
 
  .article-footer { flex-direction: column; }
 
  .back-to-top { bottom: 20px; right: 20px; width: 40px; height: 40px; font-size: 18px; }
 
  .article-card .article-content { padding: 16px; }
}

/* ============================================
   骨架屏 (Skeleton Screen)
   ============================================ */
.skeleton-card,
.skeleton-list-item,
.skeleton-detail {
  background: var(--bg-card);
  border-radius: var(--border-radius);
  padding: 20px;
  margin-bottom: 16px;
  border: 1px solid var(--border-color);
}

.skeleton-block {
  background: linear-gradient(90deg, var(--skeleton-base) 25%, var(--skeleton-shine) 50%, var(--skeleton-base) 75%);
  background-size: 200% 100%;
  animation: skeleton-shimmer 1.5s ease-in-out infinite;
  border-radius: 4px;
  margin-bottom: 12px;
}

@keyframes skeleton-shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

.skeleton-image {
  width: 100%;
  height: 180px;
  border-radius: var(--border-radius-sm);
}

.skeleton-image.tall {
  height: 300px;
}

.skeleton-title {
  width: 60%;
  height: 20px;
}

.skeleton-title.wide {
  width: 80%;
  height: 28px;
}

.skeleton-text {
  width: 100%;
  height: 14px;
}

.skeleton-text.short {
  width: 40%;
}

.skeleton-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  flex-shrink: 0;
}

.skeleton-list-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.skeleton-list-content {
  flex: 1;
}

.skeleton-list-content .skeleton-title {
  height: 18px;
  margin-bottom: 8px;
}

.skeleton-list-content .skeleton-text {
  height: 13px;
}

/* ============================================
   返回顶部按钮
   ============================================ */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 44px;
  height: 44px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  font-size: 20px;
  z-index: 999;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.3s ease, transform 0.3s ease, background 0.3s ease;
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  justify-content: center;
}

.back-to-top.visible {
  opacity: 1;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--primary-dark);
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

/* ============================================
   暗色模式兼容 - header/footer
   ============================================ */
header {
  background: var(--header-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
  position: sticky;
  top: 0;
  z-index: 1000;
  border-bottom: 1px solid var(--border-light);
  transition: background 0.3s ease;
}

footer {
  background: var(--footer-bg);
  color: var(--text-secondary);
  border-top: 1px solid var(--border-color);
  transition: background 0.3s ease, color 0.3s ease;
}

/* ============================================
   响应式优化补充
   ============================================ */
@media (max-width: 768px) {
  .back-to-top {
    bottom: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
    font-size: 18px;
  }

  .container {
    padding: 16px 12px;
  }

  main {
    padding: 16px 12px;
  }

  h1 { font-size: 22px; }
  h2 { font-size: 18px; }

  .hero-section h1 { font-size: 26px; }

  .gallery-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
  }

  .page-list {
    grid-template-columns: 1fr;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .article-card .article-content {
    padding: 14px;
  }

  .article-card .article-meta {
    flex-wrap: wrap;
    gap: 4px;
  }

  .comment-item {
    padding: 12px;
  }

  .comment-form-wrapper {
    padding: 16px;
  }

  .replies-list {
    padding: 8px;
  }

  .reply-form-row {
    flex-direction: column;
    gap: 8px;
  }

  .auth-form {
    padding: 24px 16px;
    margin: 16px 12px;
  }

  .dropdown-menu {
    right: auto;
    left: 0;
  }

  .lightbox-content {
    flex-direction: column;
    padding: 16px;
    max-height: 95vh;
  }

  .lightbox-image-wrapper { width: 100%; }
  .lightbox-details { max-height: none; }

  .article-detail h1 { font-size: 22px; }
  .article-footer { flex-direction: column; }
}

@media (max-width: 480px) {
  .gallery-grid { grid-template-columns: 1fr; }
  .page-list { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr; }
  .article-detail h1 { font-size: 20px; }
  .hero-section h1 { font-size: 22px; }
  .auth-form { padding: 20px 12px; }
  .article-footer { flex-direction: column; }
}

/* ============================================
   打印样式
   ============================================ */
@media print {
  header, footer, .back-to-top, .comments-section { display: none; }

  body { background: #fff; color: #000; }

  .container { box-shadow: none; border: none; padding: 0; }

  .article-body a { color: #000; text-decoration: underline; }
}