/* ========================================
   🌊 Dyrwin's Planet — Ocean Theme CSS
   ======================================== */

/* ----- 自定义属性 ----- */
:root {
  --ocean-dark: #0a1628;
  --ocean-mid: #0d2137;
  --ocean-light: #132d4a;
  --accent-teal: #00d4aa;
  --accent-blue: #4fc3f7;
  --accent-purple: #7c4dff;
  --accent-coral: #ff6b6b;
  --accent-gold: #ffd54f;
  --text-primary: #e8edf5;
  --text-secondary: #90a4ae;
  --text-muted: #607d8b;
  --bg-card: #0f1f33;
  --bg-card-hover: #152a45;
  --border-color: rgba(79, 195, 247, 0.15);
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  --radius: 16px;
  --radius-sm: 10px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-main: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
}

/* ----- 重置 & 基础 ----- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-main);
  color: var(--text-primary);
  background: var(--ocean-dark);
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.6;
}
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

/* ----- 海洋背景粒子 ----- */
.ocean-bg {
  position: fixed; inset: 0; z-index: -1;
  background:
    radial-gradient(ellipse at 20% 50%, rgba(0, 212, 170, 0.04) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 20%, rgba(79, 195, 247, 0.04) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 80%, rgba(124, 77, 255, 0.03) 0%, transparent 50%),
    linear-gradient(180deg, var(--ocean-dark) 0%, var(--ocean-mid) 50%, var(--ocean-light) 100%);
}
.ocean-bg::before {
  content: ''; position: absolute; inset: 0;
  background-image:
    radial-gradient(1px 1px at 10% 20%, rgba(79,195,247,0.3) 0%, transparent 100%),
    radial-gradient(1px 1px at 30% 60%, rgba(0,212,170,0.2) 0%, transparent 100%),
    radial-gradient(1px 1px at 55% 15%, rgba(79,195,247,0.25) 0%, transparent 100%),
    radial-gradient(1px 1px at 70% 45%, rgba(0,212,170,0.2) 0%, transparent 100%),
    radial-gradient(1px 1px at 90% 75%, rgba(124,77,255,0.2) 0%, transparent 100%);
  animation: twinkle 4s ease-in-out infinite alternate;
}

@keyframes twinkle {
  0% { opacity: 0.5; }
  100% { opacity: 1; }
}

/* ----- 容器 ----- */
.container {
  max-width: 1100px; margin: 0 auto; padding: 0 20px;
}
.section {
  padding: 80px 0; position: relative;
}

/* ----- 导航栏 ----- */
.navbar {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 1000; padding: 16px 0;
  transition: var(--transition);
  background: transparent;
}
.navbar.scrolled {
  background: rgba(10, 22, 40, 0.92);
  backdrop-filter: blur(20px);
  padding: 10px 0;
  border-bottom: 1px solid var(--border-color);
}
.nav-container {
  max-width: 1100px; margin: 0 auto;
  padding: 0 20px;
  display: flex; align-items: center; justify-content: space-between;
}
.nav-logo {
  display: flex; align-items: center; gap: 8px;
  font-size: 1.3rem; font-weight: 700;
}
.logo-icon { font-size: 1.5rem; }
.logo-text { background: linear-gradient(135deg, var(--accent-teal), var(--accent-blue));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.nav-links { display: flex; gap: 8px; align-items: center; }
.nav-links a {
  padding: 8px 16px; border-radius: 20px;
  font-size: 0.9rem; font-weight: 500;
  transition: var(--transition);
  color: var(--text-secondary);
  white-space: nowrap;
}
.nav-links a:hover, .nav-links a.active {
  background: rgba(79, 195, 247, 0.12);
  color: var(--text-primary);
}
.nav-links a.nav-ai {
  background: linear-gradient(135deg, rgba(0,212,170,0.2), rgba(124,77,255,0.2));
  border: 1px solid rgba(0,212,170,0.3);
  color: var(--accent-teal);
}
.nav-links a.nav-ai:hover {
  background: linear-gradient(135deg, rgba(0,212,170,0.3), rgba(124,77,255,0.3));
  box-shadow: 0 0 20px rgba(0,212,170,0.2);
}
.nav-toggle { display: none; background: none; border: none; color: var(--text-primary);
  font-size: 1.5rem; cursor: pointer; padding: 4px; }

/* ----- Hero 区域 ----- */
.hero {
  min-height: 100vh;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  text-align: center;
  padding: 120px 20px 60px;
  position: relative;
}
.hero-content {
  max-width: 700px;
  animation: fadeInUp 0.8s ease-out;
}
.hero-avatar { margin-bottom: 24px; }
.avatar-ring {
  width: 120px; height: 120px; margin: 0 auto;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-teal), var(--accent-blue), var(--accent-purple));
  display: flex; align-items: center; justify-content: center;
  animation: pulseGlow 3s ease-in-out infinite;
  box-shadow: 0 0 40px rgba(0, 212, 170, 0.3);
}
.avatar-emoji { font-size: 4rem; line-height: 1; }
@keyframes pulseGlow {
  0%, 100% { box-shadow: 0 0 40px rgba(0, 212, 170, 0.3); }
  50% { box-shadow: 0 0 60px rgba(79, 195, 247, 0.5); }
}
.hero-title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}
.highlight {
  background: linear-gradient(135deg, var(--accent-teal), var(--accent-blue));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.hero-subtitle {
  font-size: 1.1rem; color: var(--text-secondary);
  margin-bottom: 32px; line-height: 2;
}
.tag {
  display: inline-block;
  padding: 4px 12px; margin: 2px;
  border-radius: 20px;
  font-size: 0.85rem;
  background: rgba(79, 195, 247, 0.12);
  color: var(--accent-blue);
  transition: var(--transition);
}
.tag:hover {
  background: rgba(79, 195, 247, 0.25);
  transform: translateY(-1px);
}

/* ----- 按钮 ----- */
.hero-cta { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap;
  margin-bottom: 60px; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 32px; border-radius: 50px;
  font-size: 1rem; font-weight: 600;
  transition: var(--transition); cursor: pointer;
  border: none;
}
.btn-primary {
  background: linear-gradient(135deg, var(--accent-teal), var(--accent-blue));
  color: var(--ocean-dark);
  box-shadow: 0 4px 20px rgba(0, 212, 170, 0.3);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0, 212, 170, 0.4);
}
.btn-secondary {
  background: transparent;
  border: 1px solid rgba(79, 195, 247, 0.3);
  color: var(--accent-blue);
}
.btn-secondary:hover {
  background: rgba(79, 195, 247, 0.1);
  border-color: var(--accent-blue);
  transform: translateY(-2px);
}
.btn-danger {
  background: linear-gradient(135deg, #ff6b6b, #ee5a24);
  color: white;
}
.btn-danger:hover { transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(255, 107, 107, 0.4); }

/* ----- 滚动指示器 ----- */
.scroll-indicator {
  position: absolute; bottom: 30px;
  left: 50%; transform: translateX(-50%);
  display: flex; flex-direction: column;
  align-items: center; gap: 8px;
  color: var(--text-muted); font-size: 0.8rem;
  animation: bounceDown 2s ease-in-out infinite;
}
@keyframes bounceDown {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}
.scroll-arrow { font-size: 1.2rem; }

/* ----- 波浪分割 ----- */
.hero-wave { position: absolute; bottom: 0; left: 0; right: 0;
  line-height: 0; }
.hero-wave svg { width: 100%; height: 100px; }

/* ----- 区块标题 ----- */
.section-title {
  font-size: 2rem; font-weight: 700;
  margin-bottom: 48px;
  text-align: center;
  position: relative;
}
.section-title::after {
  content: ''; display: block;
  width: 60px; height: 4px;
  background: linear-gradient(90deg, var(--accent-teal), var(--accent-blue));
  border-radius: 2px;
  margin: 12px auto 0;
}

/* ----- 简介卡片 ----- */
.intro-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 40px;
  line-height: 1.9;
  font-size: 1.05rem;
}
.intro-text p { margin-bottom: 16px; }
.em {
  color: var(--accent-teal); font-weight: 600;
}
.intro-stats {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 16px; margin-top: 32px;
}
.stat {
  text-align: center; padding: 20px;
  background: rgba(79, 195, 247, 0.06);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
}
.stat-icon { font-size: 2rem; display: block; margin-bottom: 8px; }
.stat-num { font-size: 1rem; font-weight: 600; display: block;
  color: var(--accent-blue); }
.stat-label { font-size: 0.8rem; color: var(--text-muted); }

/* ----- 兴趣卡片网格 ----- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}
.interest-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 32px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  cursor: pointer;
}
.interest-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0;
  height: 4px;
  opacity: 0; transition: var(--transition);
}
.interest-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow);
  background: var(--bg-card-hover);
}
.interest-card:hover::before { opacity: 1; }
.ocean-card::before { background: linear-gradient(90deg, #00d4aa, #4fc3f7); }
.train-card::before { background: linear-gradient(90deg, #ffd54f, #ff9800); }
.music-card::before { background: linear-gradient(90deg, #7c4dff, #e040fb); }
.game-card::before { background: linear-gradient(90deg, #ff6b6b, #ff4757); }
.blog-card::before { background: linear-gradient(90deg, #4fc3f7, #2196f3); }
.ai-card::before { background: linear-gradient(90deg, #00d4aa, #7c4dff); }
.card-icon { font-size: 2.5rem; margin-bottom: 16px; }
.interest-card h3 {
  font-size: 1.3rem; font-weight: 700;
  margin-bottom: 8px;
}
.interest-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.6;
}
.interest-card p.protected {
  color: var(--accent-gold);
  font-size: 0.8rem;
  margin-bottom: 4px;
}
.card-link {
  display: inline-block; margin-top: 16px;
  font-size: 0.85rem; font-weight: 600;
  transition: var(--transition);
}
.ocean-card:hover .card-link { color: var(--accent-teal); }
.train-card:hover .card-link { color: var(--accent-gold); }
.music-card:hover .card-link { color: #e040fb; }
.game-card:hover .card-link { color: var(--accent-coral); }
.blog-card:hover .card-link { color: var(--accent-blue); }
.ai-card:hover .card-link { color: var(--accent-teal); }

/* ----- 动态列表 ----- */
.updates-list {
  max-width: 700px; margin: 0 auto;
}
.update-item {
  display: flex; gap: 24px;
  padding: 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
  transition: var(--transition);
}
.update-item:hover {
  background: var(--bg-card-hover);
  transform: translateX(4px);
}
.update-date {
  min-width: 100px;
  font-size: 0.85rem;
  color: var(--accent-teal);
  font-weight: 600;
}
.update-content h4 {
  font-size: 1rem; margin-bottom: 4px;
}
.update-content p {
  font-size: 0.9rem; color: var(--text-secondary);
}
.blog-toolbar {
  max-width: 700px;
  margin: 0 auto 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  color: var(--text-secondary);
}
.blog-toolbar .btn { padding: 10px 18px; font-size: 0.9rem; }
.blog-post-link { color: inherit; }
.post-category {
  display: inline-block;
  margin-top: 10px;
  padding: 3px 10px;
  border-radius: 999px;
  background: rgba(0, 212, 170, 0.1);
  color: var(--accent-teal);
  font-size: 0.78rem;
}
.blog-empty {
  max-width: 700px;
  margin: 0 auto;
  padding: 40px;
  text-align: center;
  color: var(--text-secondary);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
}

/* ========================================
   子页面通用样式
   ======================================== */
.page-header {
  padding: 140px 20px 60px;
  text-align: center;
  position: relative;
}
.page-header h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  margin-bottom: 12px;
}
.page-header p {
  color: var(--text-secondary);
  font-size: 1.1rem;
  max-width: 600px; margin: 0 auto;
}
.back-link {
  display: inline-flex; align-items: center; gap: 6px;
  color: var(--text-secondary); font-size: 0.9rem;
  margin-bottom: 24px; transition: var(--transition);
}
.back-link:hover { color: var(--accent-teal); }

/* ----- 专题卡片（子页面内容） ----- */
.content-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
  margin-bottom: 40px;
}
.content-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 28px;
  transition: var(--transition);
}
.content-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
  background: var(--bg-card-hover);
}
.content-card .card-icon-big { font-size: 3rem; margin-bottom: 12px; }
.content-card h3 {
  font-size: 1.2rem; font-weight: 700;
  margin-bottom: 12px;
}
.content-card p {
  color: var(--text-secondary);
  font-size: 0.92rem; line-height: 1.7;
}
.content-card ul {
  margin-top: 8px; padding-left: 0;
}
.content-card li {
  padding: 4px 0;
  font-size: 0.9rem;
  color: var(--text-secondary);
  list-style: none;
}
.content-card li::before {
  content: '✦ ';
  color: var(--accent-teal);
}
.content-card .highlight-text {
  color: var(--accent-blue);
  font-weight: 600;
}

/* ----- 大段文字卡片 ----- */
.text-block {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 40px;
  margin-bottom: 24px;
  line-height: 1.9;
}
.text-block h3 { font-size: 1.2rem; margin-bottom: 16px;
  color: var(--accent-teal); }
.text-block p { margin-bottom: 12px; color: var(--text-secondary); }
.post-detail {
  max-width: 760px;
  margin: 0 auto;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 42px;
  color: var(--text-secondary);
  line-height: 2;
  font-size: 1.02rem;
}
.post-detail p { margin-bottom: 18px; }

/* ----- 特色引用块 ----- */
.feature-quote {
  background: linear-gradient(135deg, rgba(0,212,170,0.08), rgba(124,77,255,0.08));
  border-left: 4px solid var(--accent-teal);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 24px 32px;
  margin: 24px 0;
  font-style: italic;
  color: var(--text-secondary);
}

/* ----- 图片占位 ----- */
.img-placeholder {
  width: 100%; height: 200px;
  background: linear-gradient(135deg, var(--ocean-light), var(--bg-card-hover));
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: 3rem;
  margin-bottom: 16px;
  border: 1px solid var(--border-color);
}

/* ========================================
   AI 页面 (登录 + 聊天)
   ======================================== */
.ai-page {
  min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  padding: 100px 20px;
}
.ai-container {
  width: 100%; max-width: 480px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 48px 32px;
  text-align: center;
}
.ai-container h1 {
  font-size: 1.8rem; margin-bottom: 8px;
}
.ai-container p {
  color: var(--text-secondary);
  margin-bottom: 32px;
}
.ai-icon { font-size: 4rem; margin-bottom: 16px; }

/* ----- AI 输入组 ----- */
.input-group {
  display: flex; flex-direction: column; gap: 12px;
  margin-bottom: 16px;
}
.input-group input {
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  background: rgba(255,255,255,0.04);
  color: var(--text-primary);
  font-size: 1rem;
  font-family: var(--font-main);
  transition: var(--transition);
  outline: none;
}
.input-group input:focus {
  border-color: var(--accent-teal);
  box-shadow: 0 0 0 3px rgba(0, 212, 170, 0.15);
}
.input-group input::placeholder { color: var(--text-muted); }

/* ----- AI 错误消息 ----- */
.error-msg {
  color: var(--accent-coral);
  font-size: 0.85rem;
  margin-top: 8px;
  display: none;
}
.error-msg.show { display: block; }

/* ----- AI 聊天界面 ----- */
.chat-container {
  max-width: 800px; margin: 0 auto;
  display: flex; flex-direction: column;
  height: calc(100vh - 160px); min-height: 500px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  overflow: hidden;
}
.chat-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border-color);
  display: flex; align-items: center; justify-content: space-between;
}
.chat-header h3 {
  font-size: 1rem;
  display: flex; align-items: center; gap: 8px;
}
.chat-messages {
  flex: 1; overflow-y: auto;
  padding: 24px;
  display: flex; flex-direction: column; gap: 16px;
}
.chat-message {
  display: flex; gap: 12px;
  max-width: 80%;
  animation: fadeInUp 0.3s ease-out;
}
.chat-message.user { align-self: flex-end; flex-direction: row-reverse; }
.chat-message.assistant { align-self: flex-start; }
.chat-avatar { width: 36px; height: 36px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem; flex-shrink: 0;
  background: var(--ocean-light); }
.chat-avatar.user { background: linear-gradient(135deg, var(--accent-teal), var(--accent-blue)); }
.chat-bubble {
  padding: 12px 16px;
  border-radius: 16px;
  font-size: 0.92rem;
  line-height: 1.6;
}
.chat-message.user .chat-bubble {
  background: linear-gradient(135deg, var(--accent-teal), var(--accent-blue));
  color: var(--ocean-dark);
  border-bottom-right-radius: 4px;
}
.chat-message.assistant .chat-bubble {
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border-color);
  border-bottom-left-radius: 4px;
}
.chat-input-area {
  padding: 16px 24px;
  border-top: 1px solid var(--border-color);
  display: flex; gap: 12px;
}
.chat-input-area input {
  flex: 1;
  padding: 12px 18px;
  border-radius: 24px;
  border: 1px solid var(--border-color);
  background: rgba(255,255,255,0.04);
  color: var(--text-primary);
  font-size: 0.95rem;
  font-family: var(--font-main);
  outline: none;
  transition: var(--transition);
}
.chat-input-area input:focus {
  border-color: var(--accent-teal);
}
.chat-send-btn {
  width: 44px; height: 44px;
  border-radius: 50%;
  border: none;
  background: linear-gradient(135deg, var(--accent-teal), var(--accent-blue));
  color: var(--ocean-dark);
  font-size: 1.2rem;
  cursor: pointer;
  transition: var(--transition);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.chat-send-btn:hover { transform: scale(1.05); }
.chat-send-btn:disabled { opacity: 0.4; cursor: not-allowed; }
.chat-loading {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 0; color: var(--text-muted);
  font-size: 0.85rem;
}
.chat-loading .dot { width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent-teal);
  animation: dotBounce 1.4s ease-in-out infinite both; }
.chat-loading .dot:nth-child(1) { animation-delay: -0.32s; }
.chat-loading .dot:nth-child(2) { animation-delay: -0.16s; }
@keyframes dotBounce {
  0%, 80%, 100% { transform: scale(0); }
  40% { transform: scale(1); }
}

/* ----- AI 工具选择 ----- */
.ai-tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
  margin-top: 32px;
}
.ai-tool-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 28px;
  text-align: center;
  transition: var(--transition);
  cursor: pointer;
}
.ai-tool-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow);
  background: var(--bg-card-hover);
}
.ai-tool-card .tool-icon { font-size: 2.5rem; margin-bottom: 12px; }
.ai-tool-card h3 { font-size: 1.1rem; margin-bottom: 8px; }
.ai-tool-card p { color: var(--text-secondary); font-size: 0.85rem; }

/* ========================================
   写作后台
   ======================================== */
.admin-page {
  min-height: 100vh;
  padding: 120px 20px 60px;
}
.admin-panel,
.admin-editor {
  max-width: 900px;
  margin: 0 auto;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 36px;
}
.admin-panel {
  max-width: 480px;
  text-align: center;
}
.admin-panel h1,
.admin-editor h1 {
  font-size: 1.8rem;
  margin-bottom: 8px;
}
.admin-panel p,
.admin-editor p {
  color: var(--text-secondary);
  margin-bottom: 24px;
}
.editor-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 24px;
}
.editor-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 16px;
}
.editor-field {
  display: block;
  margin-top: 16px;
}
.admin-editor label {
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 600;
}
.admin-editor input,
.admin-editor textarea {
  width: 100%;
  margin-top: 8px;
  padding: 13px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  background: rgba(255,255,255,0.04);
  color: var(--text-primary);
  font-family: var(--font-main);
  font-size: 1rem;
  outline: none;
}
.admin-editor textarea {
  min-height: 360px;
  resize: vertical;
  line-height: 1.8;
}
.admin-editor input:focus,
.admin-editor textarea:focus {
  border-color: var(--accent-teal);
  box-shadow: 0 0 0 3px rgba(0, 212, 170, 0.15);
}
.admin-status {
  min-height: 24px;
  margin-top: 18px;
  color: var(--text-muted);
}
.admin-status.success { color: var(--accent-teal); }
.admin-status.error { color: var(--accent-coral); }

/* ----- 页脚 ----- */
.footer {
  padding: 40px 20px;
  border-top: 1px solid var(--border-color);
  text-align: center;
}
.footer-content {
  display: flex; flex-direction: column;
  align-items: center; gap: 16px;
}
.footer-brand { font-size: 1.2rem; font-weight: 700;
  display: flex; align-items: center; gap: 8px; }
.footer-quote { color: var(--text-secondary); font-style: italic; font-size: 0.95rem; }
.footer-links { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; }
.footer-links a { color: var(--text-muted); font-size: 0.85rem;
  transition: var(--transition); }
.footer-links a:hover { color: var(--accent-teal); }
.footer-copy { color: var(--text-muted); font-size: 0.8rem; }

/* ----- 动画 ----- */
.reveal {
  opacity: 0; transform: translateY(30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}
.reveal.visible {
  opacity: 1; transform: translateY(0);
}
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* =========================================
   代码对话（markdown 样式）
   ========================================= */
.chat-bubble code {
  background: rgba(0,0,0,0.3);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.85em;
}
.chat-bubble pre {
  background: rgba(0,0,0,0.4);
  padding: 16px;
  border-radius: 8px;
  overflow-x: auto;
  margin: 8px 0;
  font-size: 0.85rem;
}

/* =========================================
   计算器 & 小工具
   ========================================= */
.tool-widget {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 32px;
  max-width: 500px; margin: 0 auto;
}
.tool-widget label {
  display: block;
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 8px;
}
.tool-widget .result {
  text-align: center;
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent-teal);
  margin: 16px 0;
}

/* =========================================
   响应式
   ========================================= */
@media (max-width: 768px) {
  .nav-links {
    position: fixed; top: 60px; left: 0; right: 0;
    flex-direction: column; gap: 4px;
    padding: 16px;
    background: rgba(10, 22, 40, 0.98);
    border-bottom: 1px solid var(--border-color);
    display: none;
  }
  .nav-links.open { display: flex; }
  .nav-toggle { display: block; }
  .nav-links a { width: 100%; text-align: center; padding: 12px; }
  .section { padding: 48px 0; }
  .card-grid { grid-template-columns: 1fr; }
  .content-grid { grid-template-columns: 1fr; }
  .intro-stats { grid-template-columns: repeat(2, 1fr); }
  .update-item { flex-direction: column; gap: 8px; }
  .update-date { min-width: auto; }
  .chat-message { max-width: 90%; }
  .hero-title { font-size: 1.8rem; }
  .blog-toolbar { flex-direction: column; align-items: stretch; }
  .editor-header { flex-direction: column; }
  .editor-grid { grid-template-columns: 1fr; }
  .admin-panel, .admin-editor, .post-detail { padding: 24px; }
}