/* ========================================
   《诡舍》百科 - 全局样式（增强版）
   暗黑恐怖主题 + 迷雾 + 粒子 + 视差
   ======================================== */

:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-tertiary: #1a1a2e;
  --bg-card: #14141f;
  --text-primary: #e0e0e0;
  --text-secondary: #8888aa;
  --text-dim: #555577;
  --accent-red: #cc2233;
  --accent-glow: #ff3344;
  --accent-blood: #8b0000;
  --border-color: #2a2a3e;
  --quality-blue: #4488ff;
  --quality-purple: #aa44ff;
  --quality-orange: #ff8800;
  --quality-red: #ff2244;
  --ghost-initial: #66aaff;
  --ghost-mid: #aa66ff;
  --ghost-high: #ff8844;
  --ghost-extreme: #ff2244;
  --ghost-special: #44ffaa;
  --max-width: 1200px;
  --nav-height: 60px;
  --card-radius: 12px;
  --transition-speed: 0.3s;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
  /* 暗纹背景 */
  background-image:
    radial-gradient(ellipse at 20% 50%, rgba(139,0,0,0.04) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 20%, rgba(100,50,120,0.03) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 80%, rgba(139,0,0,0.03) 0%, transparent 50%);
  background-attachment: fixed;
}
a { color: var(--accent-red); text-decoration: none; transition: color var(--transition-speed); }
a:hover { color: var(--accent-glow); text-shadow: 0 0 8px rgba(255,51,68,0.5); }
img { max-width: 100%; height: auto; }

/* 迷雾Canvas */
#fog-canvas {
  position: fixed; top: 0; left: 0; width: 100%; height: 100%;
  z-index: 0; pointer-events: none; opacity: 0.5;
}

/* 暗角遮罩 */
body::before {
  content: '';
  position: fixed; top: 0; left: 0; width: 100%; height: 100%;
  background: radial-gradient(ellipse at center, transparent 40%, rgba(0,0,0,0.6) 100%);
  pointer-events: none; z-index: 0;
}

/* 顶部血线装饰 */
body::after {
  content: '';
  position: fixed; top: 0; left: 0; width: 100%; height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent-red), var(--accent-blood), var(--accent-red), transparent);
  z-index: 1001; pointer-events: none;
  animation: bloodLineShimmer 4s ease-in-out infinite;
}

@keyframes bloodLineShimmer {
  0%, 100% { opacity: 0.6; }
  50% { opacity: 1; }
}

/* ===== 导航栏 ===== */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; height: var(--nav-height);
  background: rgba(10,10,15,0.85); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(204,34,51,0.15);
  display: flex; align-items: center; justify-content: space-between; padding: 0 24px; z-index: 1000;
  transition: all 0.4s ease;
}
.navbar.scrolled {
  background: rgba(10,10,15,0.95);
  border-bottom-color: rgba(204,34,51,0.4);
  box-shadow: 0 4px 30px rgba(0,0,0,0.5), 0 0 20px rgba(139,0,0,0.1);
}
.nav-brand {
  font-size: 1.3rem; font-weight: 700; color: var(--accent-red);
  text-shadow: 0 0 12px rgba(204,34,51,0.6); letter-spacing: 2px;
  animation: brandGlow 3s ease-in-out infinite;
}
@keyframes brandGlow {
  0%, 100% { text-shadow: 0 0 12px rgba(204,34,51,0.6); }
  50% { text-shadow: 0 0 20px rgba(204,34,51,0.9), 0 0 40px rgba(204,34,51,0.3); }
}
.nav-links { display: flex; list-style: none; gap: 8px; }
.nav-links a {
  color: var(--text-secondary); padding: 8px 14px; border-radius: 6px; font-size: 0.9rem;
  transition: all var(--transition-speed); position: relative;
}
.nav-links a:hover, .nav-links a.active {
  color: var(--text-primary); background: rgba(204,34,51,0.15);
  text-shadow: 0 0 6px rgba(255,51,68,0.3);
}
.nav-links a.active::after {
  content: ''; position: absolute; bottom: 0; left: 50%; transform: translateX(-50%);
  width: 60%; height: 2px; background: var(--accent-red); box-shadow: 0 0 8px var(--accent-red);
}

.nav-search { position: relative; }
.nav-search input {
  background: rgba(26,26,46,0.8); border: 1px solid var(--border-color); border-radius: 20px;
  padding: 6px 16px 6px 36px; color: var(--text-primary); font-size: 0.85rem; width: 180px;
  transition: all var(--transition-speed); outline: none;
}
.nav-search input:focus {
  width: 260px; border-color: var(--accent-red);
  box-shadow: 0 0 12px rgba(204,34,51,0.3), 0 0 30px rgba(204,34,51,0.1);
}
.nav-search .search-icon { position: absolute; left: 12px; top: 50%; transform: translateY(-50%); color: var(--text-dim); font-size: 0.85rem; }

.hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 4px; }
.hamburger span { width: 24px; height: 2px; background: var(--text-primary); transition: all var(--transition-speed); border-radius: 2px; }
.hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px,5px); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px,-5px); }

/* ===== 主内容 ===== */
.main-content {
  position: relative; z-index: 1; max-width: var(--max-width);
  margin: 0 auto; padding: calc(var(--nav-height) + 32px) 24px 60px;
}

.page-title { text-align: center; margin-bottom: 48px; animation: fadeInUp 0.8s ease-out; }
.page-title h1 {
  font-size: 2.2rem; color: var(--accent-red);
  text-shadow: 0 0 20px rgba(204,34,51,0.5), 0 0 60px rgba(204,34,51,0.2);
  letter-spacing: 4px; margin-bottom: 12px;
}
.page-title p { color: var(--text-secondary); font-size: 1rem; }

/* ===== 卡片（增强） ===== */
.card {
  background: var(--bg-card); border: 1px solid var(--border-color); border-radius: var(--card-radius);
  padding: 24px; transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  position: relative; overflow: hidden;
}
.card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent-red), transparent);
  opacity: 0; transition: opacity var(--transition-speed);
}
.card::after {
  content: ''; position: absolute; top: -50%; left: -50%; width: 200%; height: 200%;
  background: radial-gradient(circle at center, rgba(204,34,51,0.03) 0%, transparent 50%);
  opacity: 0; transition: opacity 0.6s ease; pointer-events: none;
}
.card:hover {
  border-color: rgba(204,34,51,0.4); transform: translateY(-4px) scale(1.005);
  box-shadow: 0 8px 32px rgba(0,0,0,0.4), 0 0 20px rgba(204,34,51,0.1);
}
.card:hover::before { opacity: 1; }
.card:hover::after { opacity: 1; }

.card.quality-blue { border-color: rgba(68,136,255,0.3); }
.card.quality-blue:hover { border-color: var(--quality-blue); box-shadow: 0 0 20px rgba(68,136,255,0.2), 0 8px 32px rgba(0,0,0,0.3); }
.card.quality-blue::before { background: linear-gradient(90deg, transparent, var(--quality-blue), transparent); }
.card.quality-purple { border-color: rgba(170,68,255,0.3); }
.card.quality-purple:hover { border-color: var(--quality-purple); box-shadow: 0 0 20px rgba(170,68,255,0.2), 0 8px 32px rgba(0,0,0,0.3); }
.card.quality-purple::before { background: linear-gradient(90deg, transparent, var(--quality-purple), transparent); }
.card.quality-orange { border-color: rgba(255,136,0,0.3); }
.card.quality-orange:hover { border-color: var(--quality-orange); box-shadow: 0 0 20px rgba(255,136,0,0.2), 0 8px 32px rgba(0,0,0,0.3); }
.card.quality-orange::before { background: linear-gradient(90deg, transparent, var(--quality-orange), transparent); }
.card.quality-red { border-color: rgba(255,34,68,0.3); }
.card.quality-red:hover { border-color: var(--quality-red); box-shadow: 0 0 20px rgba(255,34,68,0.2), 0 8px 32px rgba(0,0,0,0.3); }
.card.quality-red::before { background: linear-gradient(90deg, transparent, var(--quality-red), transparent); }

.grid { display: grid; gap: 24px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* ===== 首页英雄区（增强视差） ===== */
.hero {
  text-align: center; padding: 80px 0 60px; position: relative;
  animation: fadeIn 1s ease-out;
  will-change: transform, opacity;
}
.hero h1 {
  font-size: 4rem; color: var(--accent-red);
  text-shadow: 0 0 40px rgba(204,34,51,0.6), 0 0 80px rgba(204,34,51,0.3), 0 0 120px rgba(204,34,51,0.15);
  letter-spacing: 12px; margin-bottom: 16px;
  animation: glowPulse 3s ease-in-out infinite, heroFloat 6s ease-in-out infinite;
}
.hero .subtitle {
  font-size: 1.1rem; color: var(--text-secondary); margin-bottom: 40px; letter-spacing: 2px;
  animation: fadeInUp 1s ease-out 0.3s both;
}

@keyframes heroFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

/* 英雄区装饰线 */
.hero::before {
  content: '';
  position: absolute; bottom: 0; left: 50%; transform: translateX(-50%);
  width: 200px; height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent-red), transparent);
  animation: lineExpand 2s ease-out 0.5s both;
}
@keyframes lineExpand {
  from { width: 0; opacity: 0; }
  to { width: 200px; opacity: 1; }
}

/* ===== 信件 ===== */
.letter-box {
  background: linear-gradient(135deg, #1a1510, #15120e);
  border: 1px solid #3a3020; border-radius: var(--card-radius);
  padding: 32px 40px; margin: 32px auto; max-width: 800px;
  position: relative; font-style: italic; line-height: 2; color: #ccbb99;
  box-shadow: inset 0 0 60px rgba(0,0,0,0.3);
}
.letter-box::before {
  content: '✉'; position: absolute; top: -16px; left: 50%; transform: translateX(-50%);
  font-size: 1.5rem; background: var(--bg-primary); padding: 0 12px;
}
.letter-box .letter-title { text-align: center; font-size: 1.2rem; color: #ddcc88; margin-bottom: 20px; font-style: normal; font-weight: 600; }
.letter-box .letter-sign { text-align: right; margin-top: 20px; color: #aa9966; }

.collapsible-toggle {
  display: flex; align-items: center; justify-content: center; gap: 12px;
  cursor: pointer; color: var(--accent-red); padding: 20px 40px; font-size: 1.1rem;
  transition: all var(--transition-speed); user-select: none; -webkit-user-select: none;
  background: rgba(204,34,51,0.06); border: 1px solid rgba(204,34,51,0.2);
  border-radius: var(--card-radius); margin: 16px auto; max-width: 420px;
}
.collapsible-toggle:hover { color: var(--accent-glow); text-shadow: 0 0 10px rgba(255,51,68,0.3); background: rgba(204,34,51,0.12); border-color: rgba(204,34,51,0.4); }
.collapsible-toggle .arrow { transition: transform var(--transition-speed); }
.collapsible-toggle.active .arrow { transform: rotate(180deg); }
.collapsible-content { max-height: 0; overflow: hidden; transition: max-height 0.5s ease-out; }
.collapsible-content.open { max-height: 3000px; transition: max-height 0.8s ease-in; }

/* ===== 导航卡片（增强） ===== */
.nav-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 48px; }
.nav-card {
  background: var(--bg-card); border: 1px solid var(--border-color); border-radius: var(--card-radius);
  padding: 32px 24px; text-align: center; cursor: pointer;
  transition: all 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  position: relative; overflow: hidden; text-decoration: none;
}
.nav-card::before {
  content: ''; position: absolute; top: 0; left: -100%; width: 100%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(204,34,51,0.05), transparent);
  transition: left 0.6s ease;
}
.nav-card::after {
  content: ''; position: absolute; bottom: 0; left: 0; right: 0; height: 3px;
  background: var(--accent-red); transform: scaleX(0); transition: transform 0.4s ease;
  box-shadow: 0 0 10px var(--accent-red);
}
.nav-card:hover {
  transform: translateY(-8px) scale(1.02);
  border-color: var(--accent-red);
  box-shadow: 0 12px 40px rgba(0,0,0,0.5), 0 0 30px rgba(204,34,51,0.15);
}
.nav-card:hover::before { left: 100%; }
.nav-card:hover::after { transform: scaleX(1); }
.nav-card .icon {
  font-size: 2.5rem; margin-bottom: 16px; display: block;
  transition: transform 0.4s ease;
}
.nav-card:hover .icon { transform: scale(1.15) translateY(-4px); }
.nav-card h3 { font-size: 1.15rem; margin-bottom: 8px; color: var(--text-primary); transition: color 0.3s; }
.nav-card:hover h3 { color: var(--accent-glow); }
.nav-card p { font-size: 0.85rem; color: var(--text-secondary); }

/* ===== Tab ===== */
.tabs {
  display: flex; gap: 4px; margin-bottom: 32px;
  border-bottom: 1px solid var(--border-color); overflow-x: auto;
}
.tab-btn {
  padding: 10px 24px; background: transparent; border: none; color: var(--text-secondary);
  font-size: 0.95rem; cursor: pointer; transition: all var(--transition-speed);
  border-bottom: 2px solid transparent; white-space: nowrap; font-family: inherit;
  position: relative;
}
.tab-btn:hover { color: var(--text-primary); background: rgba(255,255,255,0.02); }
.tab-btn.active { color: var(--text-primary); border-bottom-color: var(--accent-red); }
.tab-btn[data-quality="blue"].active { border-bottom-color: var(--quality-blue); color: var(--quality-blue); }
.tab-btn[data-quality="purple"].active { border-bottom-color: var(--quality-purple); color: var(--quality-purple); }
.tab-btn[data-quality="orange"].active { border-bottom-color: var(--quality-orange); color: var(--quality-orange); }
.tab-btn[data-quality="red"].active { border-bottom-color: var(--quality-red); color: var(--quality-red); }
.tab-content { display: none; animation: tabFadeIn 0.5s ease; }
.tab-content.active { display: block; }

@keyframes tabFadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ===== 鬼器卡片 ===== */
.ghost-item-card { display: flex; gap: 20px; align-items: flex-start; }
.ghost-item-card .item-image {
  width: 100px; height: 100px; border-radius: 8px; overflow: hidden; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center; background: var(--bg-tertiary);
  border: 2px solid var(--border-color); font-size: 0.75rem; color: var(--text-dim);
  text-align: center; padding: 8px; transition: all 0.4s ease;
}
.card:hover .ghost-item-card .item-image {
  border-color: rgba(204,34,51,0.4);
  box-shadow: 0 0 15px rgba(204,34,51,0.1);
}
.ghost-item-card .item-image img { width: 100%; height: 100%; object-fit: contain; }
.ghost-item-card .item-info h3 { font-size: 1.1rem; margin-bottom: 6px; }
.ghost-item-card .item-meta { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 8px; }
.ghost-item-card .item-meta span {
  font-size: 0.8rem; padding: 2px 10px; border-radius: 10px;
  background: rgba(255,255,255,0.05); color: var(--text-secondary);
}
.ghost-item-card .item-effect { font-size: 0.9rem; color: var(--text-primary); line-height: 1.6; }
.ghost-item-card .item-negative { color: var(--accent-red); font-size: 0.85rem; margin-top: 6px; }
.ghost-item-card .item-owner { font-size: 0.8rem; color: var(--text-dim); margin-top: 8px; }

/* ===== 星级 ===== */
.stars { display: inline-flex; gap: 2px; }
.stars .star { color: #333; font-size: 1rem; transition: all 0.3s; }
.stars .star.filled { color: #ffaa00; text-shadow: 0 0 6px rgba(255,170,0,0.5); }

.difficulty-row { display: flex; align-items: center; gap: 12px; margin-bottom: 6px; }
.difficulty-row .label { font-size: 0.85rem; color: var(--text-secondary); min-width: 120px; }

/* ===== 副本详情 ===== */
.gate-detail { animation: fadeInUp 0.5s ease; }
.gate-header { text-align: center; margin-bottom: 32px; }
.gate-header h2 {
  font-size: 1.8rem; color: var(--accent-red);
  text-shadow: 0 0 16px rgba(204,34,51,0.4); margin-bottom: 8px;
}
.gate-header .gate-subtitle { color: var(--text-secondary); font-size: 0.95rem; }
.gate-section { margin-bottom: 32px; }
.gate-section h3 {
  font-size: 1.15rem; color: var(--accent-red); margin-bottom: 16px;
  padding-bottom: 8px; border-bottom: 1px solid rgba(204,34,51,0.2);
}
.gate-section ul { list-style: none; padding: 0; }
.gate-section ul li { padding: 6px 0 6px 20px; position: relative; font-size: 0.9rem; }
.gate-section ul li::before { content: '▸'; position: absolute; left: 0; color: var(--accent-red); }

.npc-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.npc-tag {
  padding: 4px 14px; background: var(--bg-tertiary); border: 1px solid var(--border-color);
  border-radius: 16px; font-size: 0.85rem; transition: all 0.3s;
}
.npc-tag:hover { border-color: var(--accent-red); background: rgba(204,34,51,0.1); }

.video-embed {
  position: relative; width: 100%; padding-bottom: 56.25%; margin: 20px 0;
  border-radius: var(--card-radius); overflow: hidden; border: 1px solid var(--border-color);
}
.video-embed iframe { position: absolute; top: 0; left: 0; width: 100%; height: 100%; border: none; }

/* ===== 鬼化 ===== */
.ghostification-card { margin-bottom: 16px; transition: all 0.3s; }
.ghostification-card:hover { transform: translateX(4px); }
.ghostification-card .ghost-name { font-size: 1.05rem; font-weight: 600; margin-bottom: 4px; }
.ghostification-card .ghost-rate { font-size: 0.8rem; margin-bottom: 8px; }
.ghost-rate-极高 { color: var(--ghost-extreme); text-shadow: 0 0 8px rgba(255,34,68,0.3); }
.ghost-rate-高 { color: var(--ghost-high); }
.ghost-rate-中 { color: var(--ghost-mid); }
.ghost-rate-低 { color: var(--ghost-initial); }
.ghost-rate-极低 { color: var(--ghost-special); }
.ghost-level-tag {
  display: inline-block; padding: 2px 10px; border-radius: 10px;
  font-size: 0.75rem; font-weight: 600; margin-right: 6px; margin-bottom: 4px;
}
.ghost-level-初级 { background: rgba(102,170,255,0.15); color: var(--ghost-initial); }
.ghost-level-中级 { background: rgba(170,102,255,0.15); color: var(--ghost-mid); }
.ghost-level-高级 { background: rgba(255,136,68,0.15); color: var(--ghost-high); }
.ghost-level-极致 { background: rgba(255,34,68,0.15); color: var(--ghost-extreme); }
.ghost-level-特异 { background: rgba(68,255,170,0.15); color: var(--ghost-special); }
.ghost-level-加强 { background: rgba(255,136,68,0.15); color: var(--ghost-high); }

/* ===== 宿舍 ===== */
.dorm-panel { margin-bottom: 16px; }
.dorm-header {
  display: flex; align-items: center; justify-content: space-between; padding: 16px 24px;
  background: var(--bg-card); border: 1px solid var(--border-color); border-radius: var(--card-radius);
  cursor: pointer; transition: all 0.4s ease;
}
.dorm-header:hover {
  border-color: var(--accent-red);
  box-shadow: 0 0 12px rgba(204,34,51,0.1), 0 4px 20px rgba(0,0,0,0.3);
  transform: translateX(4px);
}
.dorm-header h3 { font-size: 1.1rem; }
.dorm-header .dorm-summary { display: flex; gap: 16px; font-size: 0.85rem; color: var(--text-secondary); }
.dorm-header .arrow { transition: transform 0.4s ease; }
.dorm-body {
  max-height: 0; overflow: hidden; transition: max-height 0.5s ease;
  background: var(--bg-secondary); border-radius: 0 0 var(--card-radius) var(--card-radius);
}
.dorm-body.open { max-height: 2000px; border: 1px solid var(--border-color); border-top: none; }
.dorm-body-inner { padding: 24px; }
.dorm-stat { display: flex; align-items: center; gap: 8px; margin-bottom: 8px; font-size: 0.9rem; }
.dorm-stat .stat-label { color: var(--text-secondary); min-width: 100px; }
.dorm-stat .stat-value { color: var(--text-primary); }
.player-list { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 16px; }
.player-tag {
  padding: 4px 12px; background: var(--bg-tertiary); border-radius: 14px; font-size: 0.85rem;
  border: 1px solid transparent; transition: all 0.3s;
}
.player-tag:hover { border-color: var(--accent-red); background: rgba(204,34,51,0.1); }

/* ===== 规则警告 ===== */
.rule-warning {
  background: rgba(139,0,0,0.1); border: 1px solid rgba(204,34,51,0.4);
  border-left: 4px solid var(--accent-red); border-radius: 0 var(--card-radius) var(--card-radius) 0;
  padding: 20px 24px; margin-bottom: 16px; animation: pulseBorder 3s ease-in-out infinite;
  transition: all 0.3s;
}
.rule-warning:hover {
  background: rgba(139,0,0,0.15);
  box-shadow: 0 0 20px rgba(139,0,0,0.1);
  transform: translateX(4px);
}
.rule-warning h3 { color: var(--accent-red); font-size: 1.05rem; margin-bottom: 8px; }
.rule-warning p, .rule-warning li { font-size: 0.9rem; }

/* ===== 搜索 ===== */
.search-results { margin-top: 24px; }
.search-category { margin-bottom: 32px; }
.search-category h3 {
  font-size: 1rem; color: var(--accent-red); margin-bottom: 12px;
  padding-bottom: 6px; border-bottom: 1px solid var(--border-color);
}
.search-item {
  padding: 12px 16px; background: var(--bg-card); border-radius: 8px;
  margin-bottom: 8px; cursor: pointer; transition: all var(--transition-speed);
}
.search-item:hover { background: var(--bg-tertiary); transform: translateX(4px); }
.search-highlight { background: rgba(204,34,51,0.3); color: var(--accent-glow); padding: 0 2px; border-radius: 2px; }

.back-btn {
  display: inline-flex; align-items: center; gap: 6px; color: var(--text-secondary);
  font-size: 0.9rem; margin-bottom: 24px; cursor: pointer; transition: all var(--transition-speed);
}
.back-btn:hover { color: var(--accent-red); }

.footer {
  text-align: center; padding: 32px 24px; color: var(--text-dim); font-size: 0.8rem;
  border-top: 1px solid var(--border-color); margin-top: 60px; position: relative; z-index: 1;
}

.placeholder-img {
  width: 100%; height: 100%; display: flex; align-items: center; justify-content: center;
  background: var(--bg-tertiary); color: var(--text-dim); font-size: 0.75rem;
  text-align: center; border-radius: 6px;
}


/* ===== 关于页面 ===== */
.about-link-btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 28px; border: 1px solid rgba(204,34,51,0.3);
  border-radius: 8px; color: var(--text-primary); font-size: 0.95rem;
  background: rgba(204,34,51,0.06); transition: all 0.4s ease;
  text-decoration: none;
}
.about-link-btn:hover {
  border-color: var(--accent-red); background: rgba(204,34,51,0.15);
  box-shadow: 0 0 20px rgba(204,34,51,0.2); transform: translateY(-2px);
  color: var(--accent-glow); text-shadow: 0 0 8px rgba(255,51,68,0.3);
}
.grid-1 { grid-template-columns: 1fr; }
.empty-state { text-align: center; padding: 48px 24px; color: var(--text-dim); }
.empty-state .icon { font-size: 3rem; margin-bottom: 16px; opacity: 0.5; }

/* ===== 动画 ===== */
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes fadeInUp { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
@keyframes glowPulse {
  0%, 100% { text-shadow: 0 0 40px rgba(204,34,51,0.6), 0 0 80px rgba(204,34,51,0.3); }
  50% { text-shadow: 0 0 60px rgba(204,34,51,0.8), 0 0 120px rgba(204,34,51,0.5); }
}
@keyframes pulseBorder {
  0%, 100% { border-left-color: var(--accent-red); }
  50% { border-left-color: var(--accent-glow); }
}
@keyframes cardEnter {
  from { opacity: 0; transform: translateY(30px) scale(0.98); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.animate-in { animation: cardEnter 0.5s ease-out forwards; opacity: 0; }
.animate-in:nth-child(1) { animation-delay: 0.05s; }
.animate-in:nth-child(2) { animation-delay: 0.1s; }
.animate-in:nth-child(3) { animation-delay: 0.15s; }
.animate-in:nth-child(4) { animation-delay: 0.2s; }
.animate-in:nth-child(5) { animation-delay: 0.25s; }
.animate-in:nth-child(6) { animation-delay: 0.3s; }

/* ===== 响应式 ===== */
@media (max-width: 768px) {
  .nav-links {
    display: none; position: fixed; top: var(--nav-height); left: 0; right: 0;
    background: rgba(10,10,15,0.98); flex-direction: column; padding: 16px; gap: 4px;
    border-bottom: 1px solid var(--border-color);
  }
  .nav-links.open { display: flex; }
  .hamburger { display: flex; }
  .nav-search input { width: 120px; }
  .nav-search input:focus { width: 160px; }
  .hero h1 { font-size: 2.2rem; letter-spacing: 4px; }
  .nav-cards { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .letter-box { padding: 24px 20px; }
  .ghost-item-card { flex-direction: column; }
  .ghost-item-card .item-image { width: 80px; height: 80px; }
  .dorm-header { flex-direction: column; gap: 8px; align-items: flex-start; }
}

@media (max-width: 480px) {
  .nav-cards { grid-template-columns: 1fr; }
  .hero h1 { font-size: 1.8rem; }
  .page-title h1 { font-size: 1.6rem; }
}

/* ===== 管理员编辑浮动按钮 ===== */
#admin-edit-fab {
  position: fixed; bottom: 32px; right: 32px; z-index: 2000;
  padding: 12px 20px; background: rgba(139,0,0,0.85); color: #fff;
  border: 1px solid rgba(204,34,51,0.6); border-radius: 24px;
  font-size: 0.9rem; font-family: inherit; cursor: pointer;
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
  box-shadow: 0 4px 20px rgba(139,0,0,0.4), 0 0 0 1px rgba(204,34,51,0.2);
  transition: all 0.3s ease;
  display: flex; align-items: center; gap: 6px;
}
#admin-edit-fab:hover {
  background: rgba(204,34,51,0.9);
  box-shadow: 0 6px 28px rgba(204,34,51,0.5), 0 0 20px rgba(204,34,51,0.2);
  transform: translateY(-2px);
}

/* ===== 管理员编辑模态框 ===== */
.admin-edit-overlay {
  position: fixed; inset: 0; z-index: 3000;
  background: rgba(0,0,0,0.75); backdrop-filter: blur(4px);
  display: flex; align-items: center; justify-content: center;
  padding: 24px;
  animation: fadeIn 0.2s ease;
}
.admin-edit-modal {
  background: #12121a; border: 1px solid rgba(204,34,51,0.3);
  border-radius: 12px; width: 100%; max-width: 860px;
  max-height: 90vh; display: flex; flex-direction: column;
  box-shadow: 0 20px 60px rgba(0,0,0,0.7), 0 0 40px rgba(139,0,0,0.15);
  animation: fadeInUp 0.25s ease;
}
.admin-edit-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 20px; border-bottom: 1px solid rgba(204,34,51,0.2);
  font-size: 1rem; color: var(--accent-red); font-weight: 600;
}
.admin-edit-close {
  background: none; border: none; color: var(--text-secondary);
  font-size: 1.1rem; cursor: pointer; padding: 4px 8px;
  border-radius: 4px; transition: all 0.2s; font-family: inherit;
}
.admin-edit-close:hover { color: var(--accent-red); background: rgba(204,34,51,0.1); }
.admin-edit-hint {
  padding: 10px 20px; font-size: 0.8rem; color: var(--text-dim);
  background: rgba(255,170,0,0.05); border-bottom: 1px solid rgba(255,255,255,0.04);
}
.admin-edit-textarea {
  flex: 1; min-height: 400px; padding: 16px 20px;
  background: #0d0d14; color: #c8d0e0;
  border: none; outline: none; resize: none;
  font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
  font-size: 0.85rem; line-height: 1.6;
  overflow-y: auto;
}
.admin-edit-textarea:focus { background: #0f0f18; }
.admin-edit-footer {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 20px; border-top: 1px solid rgba(255,255,255,0.06);
  gap: 12px;
}
.admin-edit-btn {
  padding: 8px 20px; border-radius: 8px; font-size: 0.9rem;
  font-family: inherit; cursor: pointer; border: 1px solid transparent;
  transition: all 0.2s ease;
}
.admin-edit-btn--format {
  background: rgba(68,136,255,0.1); color: #4488ff;
  border-color: rgba(68,136,255,0.3);
}
.admin-edit-btn--format:hover { background: rgba(68,136,255,0.2); border-color: #4488ff; }
.admin-edit-btn--cancel {
  background: rgba(255,255,255,0.05); color: var(--text-secondary);
  border-color: rgba(255,255,255,0.1);
}
.admin-edit-btn--cancel:hover { background: rgba(255,255,255,0.1); color: var(--text-primary); }
.admin-edit-btn--save {
  background: rgba(139,0,0,0.7); color: #fff;
  border-color: rgba(204,34,51,0.5);
}
.admin-edit-btn--save:hover { background: rgba(204,34,51,0.85); border-color: var(--accent-red); }
.admin-edit-btn:disabled { opacity: 0.5; cursor: not-allowed; }