/* ============================
   星辰论坛 - 主样式表
   设计灵感：xkmyth.github.io
   ============================ */

/* ----- CSS 变量 ----- */
:root {
  --bg: #02040a;
  --bg-card: rgba(255,255,255,0.04);
  --bg-card-hover: rgba(255,255,255,0.07);
  --bg-nav: rgba(0,0,0,0.55);
  --text: #eef6ff;
  --text-secondary: #999cb1;
  --text-tertiary: #666;
  --border: rgba(255,255,255,0.08);
  --border-hover: rgba(96,165,250,0.25);
  --accent: #60a5fa;
  --accent2: #3b82f6;
  --accent-gradient: linear-gradient(135deg, #3b82f6, #60a5fa);
  --accent-gradient-text: linear-gradient(90deg, #9ae3ff, #60a5fa);
  --danger: #f87171;
  --success: #34d399;
  --warning: #fbbf24;
  --shadow: rgba(96,165,250,0.12);
  --glow: rgba(30,60,120,0.35);
  --radius: 16px;
  --radius-sm: 10px;
  --transition: all 0.3s cubic-bezier(0.25, 1, 0.5, 1);
}

.light {
  --bg: #f0f5ff;
  --bg-card: rgba(255,255,255,0.7);
  --bg-card-hover: rgba(255,255,255,0.85);
  --bg-nav: rgba(255,255,255,0.75);
  --text: #1a1a2e;
  --text-secondary: #555;
  --text-tertiary: #999;
  --border: rgba(0,0,0,0.08);
  --border-hover: rgba(37,99,235,0.2);
  --accent: #3b82f6;
  --accent2: #2563eb;
  --accent-gradient: linear-gradient(135deg, #2563eb, #3b82f6);
  --accent-gradient-text: linear-gradient(90deg, #2563eb, #3b82f6);
  --shadow: rgba(37,99,235,0.1);
  --glow: rgba(37,99,235,0.08);
}

/* ----- Reset ----- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html { scroll-behavior: smooth; }

body {
  font-family: "Segoe UI", "Microsoft YaHei", "PingFang SC", "HarmonyOS Sans", sans-serif;
  background: var(--bg);
  color: var(--text);
  overflow-x: hidden;
  min-height: 100vh;
  transition: background 0.4s ease, color 0.4s ease;
  line-height: 1.6;
}

a { color: var(--accent); text-decoration: none; transition: color 0.2s; }
a:hover { color: #93c5fd; }

/* ----- 星空背景 ----- */
#stars-canvas {
  position: fixed; top: 0; left: 0;
  width: 100vw; height: 100vh;
  z-index: -3;
  pointer-events: none;
}

#glow {
  position: fixed; top: 0; left: 0;
  width: 100vw; height: 100vh;
  background: radial-gradient(ellipse at 50% 30%, var(--glow), transparent 65%);
  z-index: -2;
  pointer-events: none;
  transition: background 0.4s ease;
}

/* ----- 导航栏 ----- */
.navbar {
  position: sticky; top: 0; z-index: 999;
  background: var(--bg-nav);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}

.nav-inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
  gap: 16px;
}

.nav-left {
  display: flex;
  align-items: center;
  gap: 24px;
}

.logo {
  font-size: 22px;
  font-weight: 700;
  background: var(--accent-gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  white-space: nowrap;
  cursor: pointer;
  transition: opacity 0.2s;
}

.logo:hover { opacity: 0.85; }

.nav-links {
  display: flex;
  gap: 4px;
}

.nav-link {
  color: var(--text-secondary);
  padding: 6px 14px;
  font-size: 14px;
  border-radius: 8px;
  transition: var(--transition);
  cursor: pointer;
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 1px; left: 14px; right: 14px;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transition: transform 0.25s ease;
  border-radius: 2px;
}

.nav-link:hover {
  color: var(--text);
  background: rgba(255,255,255,0.06);
}

.nav-link:hover::after { transform: scaleX(1); }
.nav-link.active { color: var(--accent); }
.nav-link.active::after { transform: scaleX(1); }

.nav-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* ----- 按钮样式 ----- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 18px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  white-space: nowrap;
  line-height: 1.4;
  text-decoration: none;
}

.btn:hover { transform: translateY(-1px); }

.btn-primary {
  background: var(--accent-gradient);
  color: #fff;
  box-shadow: 0 2px 8px rgba(59,130,246,0.2);
}

.btn-primary:hover {
  filter: brightness(1.1);
  box-shadow: 0 4px 16px rgba(59,130,246,0.3);
}

.btn-outline {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border);
}

.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(96,165,250,0.08);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
}

.btn-ghost:hover {
  background: rgba(255,255,255,0.06);
  color: var(--text);
}

.btn-sm { padding: 5px 12px; font-size: 13px; }
.btn-lg { padding: 12px 28px; font-size: 16px; }
.btn-block { width: 100%; }

.btn-danger {
  background: linear-gradient(135deg, #ef4444, #f87171);
  color: #fff;
}

.btn-text {
  background: none;
  color: var(--accent);
  padding: 4px 8px;
  font-size: 14px;
  cursor: pointer;
  border: none;
  transition: color 0.2s;
}

.btn-text:hover { color: #93c5fd; }

/* ----- 切换按钮 ----- */
.theme-toggle {
  background: rgba(255,255,255,0.06);
  color: var(--text-secondary);
  border: 1px solid var(--border);
  padding: 7px 14px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 15px;
  transition: var(--transition);
}

.theme-toggle:hover {
  background: rgba(255,255,255,0.12);
  border-color: rgba(255,255,255,0.2);
}

/* ----- 搜索栏 ----- */
.search-container {
  max-width: 600px;
  margin: 0 auto;
  position: relative;
}

.search-input {
  width: 100%;
  padding: 14px 48px 14px 20px;
  border-radius: 30px;
  border: 1px solid var(--border);
  background: rgba(0,0,0,0.3);
  color: var(--text);
  font-size: 15px;
  outline: none;
  backdrop-filter: blur(8px);
  transition: var(--transition);
}

.search-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 30px rgba(96,165,250,0.12);
}

.search-input::placeholder { color: var(--text-tertiary); }

.search-btn {
  position: absolute;
  right: 6px; top: 6px;
  background: var(--accent-gradient);
  color: #fff;
  border: none;
  width: 38px; height: 38px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  font-size: 16px;
}

.search-btn:hover {
  filter: brightness(1.1);
  transform: scale(1.05);
}

.light .search-input { background: rgba(255,255,255,0.8); color: #111; }

/* ----- 内容容器 ----- */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ----- Banner ----- */
.hero {
  text-align: center;
  padding: 50px 20px 30px;
}

.hero h1 {
  font-size: clamp(28px, 5vw, 44px);
  font-weight: 800;
  margin-bottom: 10px;
  background: linear-gradient(135deg, #00c6ff, #0072ff, #9ae3ff);
  background-size: 200% 200%;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: gradientShift 4s ease infinite;
}

@keyframes gradientShift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

.hero p {
  color: var(--text-secondary);
  font-size: clamp(14px, 2vw, 17px);
  max-width: 550px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ----- 板块标签 ----- */
.category-bar {
  display: flex;
  gap: 8px;
  padding: 16px 0 24px;
  overflow-x: auto;
  flex-wrap: nowrap;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.category-bar::-webkit-scrollbar { display: none; }

.category-tab {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  border-radius: 20px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text-secondary);
  font-size: 13px;
  cursor: pointer;
  white-space: nowrap;
  transition: var(--transition);
  flex-shrink: 0;
}

.category-tab:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  color: var(--text);
}

.category-tab.active {
  background: var(--accent-gradient);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 4px 12px rgba(59,130,246,0.2);
}

.category-tab .cat-icon { font-size: 15px; }
.category-tab .cat-count {
  font-size: 11px;
  opacity: 0.6;
  margin-left: 2px;
}

/* ----- 排序栏 ----- */
.sort-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.sort-btn {
  padding: 5px 14px;
  border-radius: 8px;
  border: none;
  background: transparent;
  color: var(--text-tertiary);
  font-size: 13px;
  cursor: pointer;
  transition: var(--transition);
}

.sort-btn:hover { color: var(--text); background: rgba(255,255,255,0.04); }
.sort-btn.active { color: var(--accent); background: rgba(96,165,250,0.1); }

/* ----- 帖子列表 ----- */
.post-list { min-height: 300px; }

.post-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin-bottom: 12px;
  backdrop-filter: blur(8px);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.post-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: linear-gradient(135deg, rgba(96,165,250,0.05), transparent);
  opacity: 0;
  transition: opacity 0.4s ease;
  pointer-events: none;
}

.post-card:hover {
  transform: translateY(-3px);
  border-color: var(--border-hover);
  box-shadow: 0 8px 30px var(--shadow);
}

.post-card:hover::before { opacity: 1; }

.post-card.pinned {
  border-left: 3px solid var(--accent);
}

.post-header {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 10px;
}

.post-avatar {
  width: 40px; height: 40px;
  border-radius: 50%;
  background: var(--accent-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 16px;
  flex-shrink: 0;
  overflow: hidden;
}

.post-avatar img {
  width: 100%; height: 100%;
  object-fit: cover;
}

.post-meta {
  flex: 1;
  min-width: 0;
}

.post-title {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 4px;
  line-height: 1.4;
  color: var(--text);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.post-title .pin-badge {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  font-size: 10px;
  padding: 1px 8px;
  border-radius: 4px;
  margin-right: 6px;
  vertical-align: middle;
  font-weight: 500;
}

.post-info {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--text-tertiary);
  flex-wrap: wrap;
}

.post-info .author-name {
  color: var(--accent);
  font-weight: 500;
}

.post-info .category-name {
  padding: 1px 8px;
  border-radius: 4px;
  font-size: 11px;
  background: rgba(96,165,250,0.1);
  color: var(--accent);
}

.post-excerpt {
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 10px;
}

.post-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}

.post-tag {
  padding: 2px 10px;
  border-radius: 6px;
  background: rgba(255,255,255,0.05);
  color: var(--text-tertiary);
  font-size: 11px;
  border: 1px solid var(--border);
}

.post-footer {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 12px;
  color: var(--text-tertiary);
}

.post-stat {
  display: flex;
  align-items: center;
  gap: 4px;
  transition: color 0.2s;
}

.post-stat.liked { color: var(--danger); }
.post-stat.bookmarked { color: var(--warning); }
.post-stat:hover { color: var(--text); }

/* ----- 分页 ----- */
.pagination {
  display: flex;
  justify-content: center;
  gap: 6px;
  padding: 24px 0;
}

.page-btn {
  padding: 8px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: transparent;
  color: var(--text-secondary);
  font-size: 13px;
  cursor: pointer;
  transition: var(--transition);
}

.page-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.page-btn.active {
  background: var(--accent-gradient);
  color: #fff;
  border-color: transparent;
}

.page-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

/* ----- 帖子详情页 ----- */
.back-btn { margin-bottom: 16px; }

.post-detail {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  margin-bottom: 16px;
  backdrop-filter: blur(8px);
}

.post-detail .post-title-lg {
  font-size: clamp(22px, 3vw, 32px);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 12px;
}

.post-detail .post-meta-bar {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}

.post-detail .post-author {
  display: flex;
  align-items: center;
  gap: 10px;
}

.post-detail .post-author .pa-avatar {
  width: 36px; height: 36px;
  border-radius: 50%;
  background: var(--accent-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 600;
  font-size: 14px;
  overflow: hidden;
}

.post-detail .post-author .pa-avatar img { width: 100%; height: 100%; object-fit: cover; }

.post-detail .post-author .pa-info {
  display: flex;
  flex-direction: column;
}

.post-detail .post-author .pa-name {
  font-weight: 500;
  font-size: 14px;
  color: var(--text);
}

.post-detail .post-author .pa-role {
  font-size: 11px;
  color: var(--accent);
  text-transform: uppercase;
}

.post-detail .post-stat-bar {
  display: flex;
  gap: 20px;
  margin-left: auto;
  color: var(--text-tertiary);
  font-size: 13px;
}

.post-detail .post-stat-bar span {
  display: flex;
  align-items: center;
  gap: 4px;
  cursor: pointer;
  transition: color 0.2s;
}

.post-detail .post-stat-bar span:hover { color: var(--text); }
.post-detail .post-stat-bar span.liked { color: var(--danger); }
.post-detail .post-stat-bar span.bookmarked { color: var(--warning); }

.post-detail .post-content {
  font-size: 16px;
  line-height: 1.8;
  color: var(--text);
}

.post-detail .post-content p { margin-bottom: 16px; }

.post-detail .post-content h2, .post-detail .post-content h3 {
  margin-top: 28px;
  margin-bottom: 12px;
  font-weight: 600;
}

.post-detail .post-content h2 { font-size: 22px; }
.post-detail .post-content h3 { font-size: 18px; }

.post-detail .post-content pre {
  background: rgba(0,0,0,0.4);
  border-radius: 10px;
  padding: 16px;
  overflow-x: auto;
  margin-bottom: 16px;
  font-size: 14px;
  line-height: 1.6;
  border: 1px solid var(--border);
}

.post-detail .post-content code {
  background: rgba(0,0,0,0.3);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 14px;
}

.post-detail .post-content pre code {
  background: none;
  padding: 0;
}

.post-detail .post-content img {
  max-width: 100%;
  border-radius: 10px;
  margin: 16px 0;
}

.post-detail .post-content blockquote {
  border-left: 3px solid var(--accent);
  padding: 8px 16px;
  margin: 16px 0;
  color: var(--text-secondary);
  background: rgba(96,165,250,0.05);
  border-radius: 0 8px 8px 0;
}

.post-detail .post-content ul, .post-detail .post-content ol {
  margin-bottom: 16px;
  padding-left: 24px;
}

.post-detail .post-content li { margin-bottom: 4px; }

.post-detail .post-tags-lg {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

.post-detail .post-tags-lg .tag {
  padding: 4px 12px;
  border-radius: 8px;
  background: rgba(255,255,255,0.05);
  color: var(--text-tertiary);
  font-size: 12px;
  border: 1px solid var(--border);
}

/* ----- 评论区 ----- */
.comments-section {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 32px;
  margin-bottom: 16px;
  backdrop-filter: blur(8px);
}

.comments-section h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}

.comment-item {
  padding: 12px 0;
  border-bottom: 1px solid rgba(255,255,255,0.04);
}

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

.comment-item.reply {
  margin-left: 48px;
  padding-left: 16px;
  border-left: 2px solid var(--accent);
  border-radius: 0 8px 8px 0;
}

.comment-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
}

.comment-avatar {
  width: 28px; height: 28px;
  border-radius: 50%;
  background: var(--accent-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  flex-shrink: 0;
  overflow: hidden;
}

.comment-avatar img { width: 100%; height: 100%; object-fit: cover; }

.comment-author {
  font-weight: 500;
  font-size: 13px;
  color: var(--accent);
}

.comment-time {
  font-size: 11px;
  color: var(--text-tertiary);
  margin-left: auto;
}

.comment-body {
  font-size: 14px;
  line-height: 1.6;
  color: var(--text);
}

.comment-actions {
  margin-top: 6px;
  display: flex;
  gap: 8px;
}

.comment-actions button {
  background: none;
  border: none;
  color: var(--text-tertiary);
  font-size: 12px;
  cursor: pointer;
  padding: 2px 4px;
  transition: color 0.2s;
}

.comment-actions button:hover { color: var(--accent); }

/* ----- 评论框 ----- */
.comment-form {
  margin-top: 16px;
}

.comment-form textarea {
  width: 100%;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: rgba(0,0,0,0.2);
  color: var(--text);
  font-size: 14px;
  resize: vertical;
  min-height: 80px;
  outline: none;
  transition: var(--transition);
  font-family: inherit;
}

.comment-form textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 20px rgba(96,165,250,0.08);
}

.comment-form textarea::placeholder { color: var(--text-tertiary); }

.light .comment-form textarea { background: rgba(255,255,255,0.8); }

.comment-form .form-footer {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 8px;
}

/* ----- 发帖/编辑表单 ----- */
.form-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  max-width: 800px;
  margin: 0 auto;
  backdrop-filter: blur(8px);
}

.form-card h2 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 24px;
  background: var(--accent-gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.form-group {
  margin-bottom: 18px;
}

.form-group label {
  display: block;
  margin-bottom: 6px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: rgba(0,0,0,0.2);
  color: var(--text);
  font-size: 14px;
  outline: none;
  transition: var(--transition);
  font-family: inherit;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 20px rgba(96,165,250,0.08);
}

.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--text-tertiary); }

.form-group select {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23666' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
}

.light .form-group input,
.light .form-group select,
.light .form-group textarea {
  background: rgba(255,255,255,0.8);
  color: #111;
}

.form-error {
  color: var(--danger);
  font-size: 13px;
  margin-top: 4px;
}

/* ----- 弹窗 ----- */
.modal-backdrop {
  position: fixed; top: 0; left: 0; bottom: 0; right: 0;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(4px);
  z-index: 9998;
}

.modal {
  position: fixed; top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  z-index: 9999;
  width: calc(100% - 32px);
  max-width: 420px;
}

.modal-content {
  background: linear-gradient(135deg, rgba(30,40,60,0.95), rgba(15,20,35,0.98));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  backdrop-filter: blur(20px);
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
  position: relative;
}

.light .modal-content {
  background: linear-gradient(135deg, rgba(255,255,255,0.95), rgba(240,245,255,0.98));
}

.modal-close {
  position: absolute; top: 12px; right: 16px;
  font-size: 24px;
  cursor: pointer;
  color: var(--text-tertiary);
  background: none;
  border: none;
  transition: color 0.2s;
}

.modal-close:hover { color: var(--text); }

.modal-content h2 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 20px;
  text-align: center;
}

.form-footer {
  text-align: center;
  margin-top: 14px;
  font-size: 13px;
  color: var(--text-tertiary);
}

.form-footer a { color: var(--accent); cursor: pointer; }

/* ----- Toast 通知 ----- */
.toast {
  position: fixed; bottom: 24px; left: 50%;
  transform: translateX(-50%) translateY(80px);
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  background: rgba(0,0,0,0.85);
  backdrop-filter: blur(8px);
  color: #fff;
  font-size: 14px;
  z-index: 99999;
  opacity: 0;
  transition: all 0.3s ease;
  pointer-events: none;
  border: 1px solid rgba(255,255,255,0.1);
  white-space: nowrap;
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.light .toast { background: rgba(255,255,255,0.9); color: #111; }

/* ----- 空状态 ----- */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-tertiary);
}

.empty-state .empty-icon { font-size: 48px; margin-bottom: 12px; }
.empty-state p { font-size: 15px; }

/* ----- Loading ----- */
.loading {
  text-align: center;
  padding: 40px;
  color: var(--text-tertiary);
}

.loading-spinner {
  width: 32px; height: 32px;
  border-radius: 50%;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  animation: spin 0.8s linear infinite;
  margin: 0 auto 12px;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* ----- 管理员面板 ----- */
.admin-dashboard {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  backdrop-filter: blur(8px);
}

.stat-card .stat-value {
  font-size: 28px;
  font-weight: 700;
  background: var(--accent-gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.stat-card .stat-label {
  font-size: 13px;
  color: var(--text-tertiary);
  margin-top: 4px;
}

.admin-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 16px;
}

.admin-table th {
  text-align: left;
  padding: 10px 12px;
  font-size: 12px;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-bottom: 1px solid var(--border);
}

.admin-table td {
  padding: 10px 12px;
  font-size: 14px;
  border-bottom: 1px solid rgba(255,255,255,0.04);
}

.admin-table tr:hover td { background: rgba(255,255,255,0.02); }

.admin-badge {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 6px;
  font-size: 11px;
  font-weight: 500;
}

.admin-badge.admin { background: rgba(96,165,250,0.15); color: var(--accent); }
.admin-badge.user { background: rgba(255,255,255,0.05); color: var(--text-tertiary); }

/* ----- 图片识别面板 ----- */
.vision-panel {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  backdrop-filter: blur(8px);
  margin-bottom: 16px;
}

.vision-panel h3 {
  margin-bottom: 12px;
  color: var(--accent);
}

.vision-panel .vision-input-group {
  display: flex;
  gap: 8px;
  margin-bottom: 12px;
}

.vision-panel .vision-input-group input {
  flex: 1;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: rgba(0,0,0,0.2);
  color: var(--text);
  font-size: 14px;
  outline: none;
}

.vision-result {
  padding: 12px;
  border-radius: var(--radius-sm);
  background: rgba(0,0,0,0.2);
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-secondary);
  margin-top: 8px;
}

/* ----- 页脚 ----- */
.footer {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-tertiary);
  background: rgba(0,0,0,0.3);
  margin-top: 60px;
  font-size: 13px;
  border-top: 1px solid var(--border);
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-bottom: 8px;
}

.footer-links a {
  color: var(--text-tertiary);
  font-size: 13px;
}

.footer-links a:hover { color: var(--accent); }

/* ----- Markdown 工具栏 (发帖时用) ----- */
.editor-toolbar {
  display: flex;
  gap: 4px;
  padding: 8px;
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  border: 1px solid var(--border);
  border-bottom: none;
  background: rgba(0,0,0,0.15);
  flex-wrap: wrap;
}

.editor-toolbar button {
  padding: 6px 10px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
  transition: var(--transition);
}

.editor-toolbar button:hover {
  background: rgba(255,255,255,0.06);
  color: var(--text);
}

.editor-textarea {
  border-radius: 0 0 var(--radius-sm) var(--radius-sm) !important;
  min-height: 300px;
}

/* ----- 响应式 ----- */
@media (max-width: 768px) {
  .nav-inner { padding: 0 12px; height: 54px; }
  .logo { font-size: 18px; }
  .nav-links { gap: 2px; }
  .nav-link { font-size: 12px; padding: 5px 8px; }
  .nav-link::after { left: 8px; right: 8px; }
  .container { padding: 0 12px; }
  .post-card { padding: 16px; border-radius: 12px; }
  .post-detail { padding: 20px; }
  .comments-section { padding: 16px 20px; }
  .form-card { padding: 20px; }
  .category-bar { padding: 10px 0 16px; }
  .category-tab { padding: 6px 14px; font-size: 12px; }
  .comment-item.reply { margin-left: 24px; }
  .admin-dashboard { grid-template-columns: repeat(2, 1fr); }
  .post-detail .post-stat-bar { margin-left: 0; width: 100%; }
  .post-detail .post-meta-bar { flex-wrap: wrap; }
  .hero { padding: 30px 12px 20px; }
}

@media (max-width: 480px) {
  .admin-dashboard { grid-template-columns: 1fr; }
  .post-detail .post-stat-bar { gap: 12px; font-size: 12px; }
}