/* ============================================================
   极简暗色科技风 — 全局样式
   ============================================================ */

:root {
  --bg-primary: #080c14;
  --bg-secondary: #0f1520;
  --bg-card: #111827;
  --bg-card-hover: #1a2332;
  --border: #1e2d3d;
  --border-glow: #00c6ff33;
  --text-primary: #e2e8f0;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent-tech: #00c6ff;
  --accent-tech-dim: #00c6ff22;
  --accent-sales: #a78bfa;
  --accent-sales-dim: #a78bfa22;
  --accent-notes: #00d4ff;
  --accent-notes-dim: #00d4ff22;
  --radius: 8px;
  --radius-lg: 12px;
  --transition: 0.25s ease;
  --nav-height: 64px;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Courier New', monospace;
  --font-sans: -apple-system, 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.7;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* 网格背景 */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,198,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,198,255,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  z-index: 0;
}

/* ============================================================
   导航栏
   ============================================================ */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-height);
  background: rgba(8,12,20,0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 24px;
}

.nav-inner {
  max-width: 1100px;
  width: 100%;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
  text-decoration: none;
  letter-spacing: 2px;
}

.nav-brand span { color: var(--accent-tech); }

.nav-links {
  display: flex;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color var(--transition);
  position: relative;
  padding: 4px 0;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-tech);
  transition: width var(--transition);
}

.nav-links a:hover,
.nav-links a.active { color: var(--text-primary); }

.nav-links a:hover::after,
.nav-links a.active::after { width: 100%; }

/* 销售页导航高亮色 */
body.sales-page .nav-links a::after { background: var(--accent-sales); }
body.sales-page .nav-links a:hover,
body.sales-page .nav-links a.active { color: var(--accent-sales); }

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  flex-direction: column;
  gap: 5px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: var(--transition);
}

/* ============================================================
   容器 & 布局
   ============================================================ */

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 80px 0;
}

.section-header {
  margin-bottom: 48px;
}

.section-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-tech);
  text-transform: uppercase;
  letter-spacing: 3px;
  margin-bottom: 8px;
}

body.sales-page .section-tag { color: var(--accent-sales); }

.section-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.section-line {
  width: 60px;
  height: 3px;
  background: var(--accent-tech);
  border-radius: 2px;
}

body.sales-page .section-line { background: var(--accent-sales); }

/* ============================================================
   卡片
   ============================================================ */

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: all var(--transition);
}

.card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-glow);
  box-shadow: 0 0 30px rgba(0,198,255,0.06);
  transform: translateY(-2px);
}

body.sales-page .card:hover {
  border-color: var(--accent-sales-dim);
  box-shadow: 0 0 30px rgba(167,139,250,0.06);
}

.card-grid { display: grid; gap: 20px; }
.card-grid-2 { grid-template-columns: repeat(2, 1fr); }
.card-grid-3 { grid-template-columns: repeat(3, 1fr); }
.card-grid-4 { grid-template-columns: repeat(4, 1fr); }

/* ============================================================
   按钮
   ============================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all var(--transition);
  font-family: var(--font-sans);
}

.btn-tech {
  background: var(--accent-tech-dim);
  border-color: var(--accent-tech);
  color: var(--accent-tech);
}

.btn-tech:hover {
  background: var(--accent-tech);
  color: #080c14;
  box-shadow: 0 0 25px rgba(0,198,255,0.3);
}

.btn-sales {
  background: var(--accent-sales-dim);
  border-color: var(--accent-sales);
  color: var(--accent-sales);
}

.btn-sales:hover {
  background: var(--accent-sales);
  color: #080c14;
  box-shadow: 0 0 25px rgba(167,139,250,0.3);
}

.btn-notes {
  background: var(--accent-notes-dim);
  border-color: var(--accent-notes);
  color: var(--accent-notes);
}

.btn-notes:hover {
  background: var(--accent-notes);
  color: #080c14;
  box-shadow: 0 0 25px rgba(0,212,255,0.3);
}

.btn-ai {
  background: var(--accent-tech-dim);
  border-color: var(--accent-tech);
  color: var(--accent-tech);
}

.btn-ai:hover {
  background: var(--accent-tech);
  color: #080c14;
  box-shadow: 0 0 25px rgba(0,198,255,0.3);
}

.btn-ai-resume {
  background: rgba(147, 51, 234, 0.13);
  border-color: #a855f7;
  color: #c084fc;
}

.btn-ai-resume:hover {
  background: #a855f7;
  color: #fff;
  box-shadow: 0 0 25px rgba(168,85,247,0.35);
}

.btn-submit {
  background: var(--accent-tech);
  color: #080c14;
  border: none;
  font-weight: 600;
}

.btn-submit:hover {
  box-shadow: 0 0 25px rgba(0,198,255,0.35);
  transform: translateY(-1px);
}

/* ============================================================
   时间线
   ============================================================ */

.timeline {
  position: relative;
  padding-left: 32px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 11px;
  top: 4px;
  bottom: 4px;
  width: 2px;
  background: var(--border);
}

.timeline-item {
  position: relative;
  margin-bottom: 32px;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -25px;
  top: 6px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent-tech);
  border: 2px solid var(--bg-primary);
  box-shadow: 0 0 8px rgba(0,198,255,0.4);
}

body.sales-page .timeline-item::before { background: var(--accent-sales); box-shadow: 0 0 8px rgba(167,139,250,0.4); }

.timeline-date {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent-tech);
  margin-bottom: 4px;
}

body.sales-page .timeline-date { color: var(--accent-sales); }

.timeline-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.timeline-subtitle {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

/* ============================================================
   技能条
   ============================================================ */

.skill-item {
  margin-bottom: 20px;
}

.skill-header {
  display: flex;
  justify-content: space-between;
  margin-bottom: 6px;
  font-size: 0.9rem;
}

.skill-name { font-weight: 500; }
.skill-pct { font-family: var(--font-mono); color: var(--accent-tech); }

.skill-bar {
  height: 6px;
  background: var(--border);
  border-radius: 3px;
  overflow: hidden;
}

.skill-fill {
  height: 100%;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--accent-tech), #00e5ff);
  transition: width 1.2s ease;
  width: 0;
}

body.sales-page .skill-fill { background: linear-gradient(90deg, var(--accent-sales), #c4b5fd); }

.skill-detail {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ============================================================
   统计数字卡片
   ============================================================ */

.stat-card {
  text-align: center;
  padding: 24px 16px;
}

.stat-number {
  font-family: var(--font-mono);
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--accent-tech);
  line-height: 1.2;
}

body.sales-page .stat-number { color: var(--accent-sales); }

.stat-label {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-top: 6px;
}

/* ============================================================
   图标列表
   ============================================================ */

.icon-list {
  list-style: none;
}

.icon-list li {
  position: relative;
  padding-left: 24px;
  margin-bottom: 10px;
  color: var(--text-secondary);
  font-size: 0.92rem;
}

.icon-list li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--accent-tech);
  font-size: 0.7rem;
  top: 2px;
}

body.sales-page .icon-list li::before { color: var(--accent-sales); }

/* ============================================================
   联系页专用
   ============================================================ */

.contact-card {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 24px;
}

.contact-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius);
  background: var(--accent-tech-dim);
  border: 1px solid rgba(0,198,255,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 1.2rem;
}

.contact-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 2px;
}

.contact-value {
  font-size: 1.05rem;
  color: var(--text-primary);
  font-weight: 500;
}

.contact-value a {
  color: var(--accent-tech);
  text-decoration: none;
}

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

.form-label {
  display: block;
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.form-input,
.form-textarea {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  transition: border-color var(--transition);
  resize: vertical;
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--accent-tech);
  box-shadow: 0 0 12px rgba(0,198,255,0.1);
}

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

.char-count {
  text-align: right;
  font-size: 0.75em;
  color: #888;
  margin-top: 4px;
}

/* ============================================================
   首页特有
   ============================================================ */

.hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  text-align: center;
  padding-top: var(--nav-height);
}

.hero-name {
  font-size: 3.5rem;
  font-weight: 800;
  letter-spacing: 4px;
  margin-bottom: 12px;
}

.hero-name .dot {
  color: var(--accent-tech);
}

.hero-tagline {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--text-secondary);
  min-height: 1.5em;
  margin-bottom: 32px;
}

.hero-tagline .cursor {
  display: inline-block;
  width: 2px;
  height: 1.1em;
  background: var(--accent-tech);
  vertical-align: text-bottom;
  animation: blink 1s step-end infinite;
}

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

.hero-info {
  display: flex;
  gap: 32px;
  margin-bottom: 48px;
  flex-wrap: wrap;
  justify-content: center;
}

.hero-info-item {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
}

.hero-info-item .icon-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-tech);
}

.hero-actions {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  justify-content: center;
}

/* 技术标签云 */
.tech-tags {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin: 25px 0;
}

.tag {
  padding: 5px 15px;
  border: 1px solid rgba(0, 212, 255, 0.3);
  border-radius: 20px;
  color: #00d4ff;
  font-size: 0.8em;
  transition: all 0.3s;
}

.tag:hover {
  background: rgba(0, 212, 255, 0.1);
  border-color: #00d4ff;
  transform: translateY(-2px);
}

/* GitHub 链接 */
.github-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 28px;
  padding: 10px 22px;
  border: 1px solid var(--border);
  border-radius: 24px;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  text-decoration: none;
  transition: all var(--transition);
}

.github-link:hover {
  color: #f0f6fc;
  border-color: #30363d;
  background: rgba(48,54,61,0.3);
  box-shadow: 0 0 20px rgba(255,255,255,0.05);
  transform: translateY(-1px);
}

.github-link svg {
  transition: fill var(--transition);
  opacity: 0.6;
}

.github-link:hover svg {
  opacity: 1;
}

.hero-scroll {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
  font-size: 0.75rem;
  font-family: var(--font-mono);
  animation: float 2.5s ease-in-out infinite;
}

.hero-scroll-arrow {
  width: 20px;
  height: 20px;
  border-right: 2px solid var(--text-muted);
  border-bottom: 2px solid var(--text-muted);
  transform: rotate(45deg);
}

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

/* ============================================================
   首页精选项目
   ============================================================ */

.featured-projects {
  margin: 60px auto;
  max-width: 900px;
  padding: 0 20px;
}

.section-title-hp {
  color: #00d4ff;
  font-size: 1.3em;
  margin-bottom: 25px;
  border-bottom: 1px solid rgba(0, 212, 255, 0.15);
  padding-bottom: 10px;
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 18px;
}

.project-card-mini {
  padding: 20px;
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.02);
  transition: all 0.3s;
  display: flex;
  flex-direction: column;
}

.project-card-mini:hover {
  border-color: rgba(0, 212, 255, 0.25);
  transform: translateY(-4px);
}

.card-icon { font-size: 1.5em; margin-bottom: 8px; }

.project-card-mini h3 {
  color: #eaeaea;
  font-size: 1em;
  margin-bottom: 8px;
}

.project-card-mini p {
  color: #888;
  font-size: 0.8em;
  line-height: 1.5;
  margin-bottom: 10px;
  flex: 1;
}

.card-tech {
  color: #00d4ff;
  font-size: 0.7em;
  display: block;
  margin-bottom: 10px;
}

.card-link {
  color: #00d4ff;
  font-size: 0.8em;
  text-decoration: none;
  font-weight: 500;
}

.card-link:hover { text-decoration: underline; }

.view-all {
  text-align: center;
  margin-top: 25px;
}

.btn-more {
  display: inline-block;
  padding: 8px 24px;
  border: 1px solid rgba(0, 212, 255, 0.3);
  border-radius: 4px;
  color: #00d4ff;
  text-decoration: none;
  font-size: 0.85em;
  transition: all 0.3s;
}

.btn-more:hover {
  background: rgba(0, 212, 255, 0.1);
}

@media (max-width: 600px) {
  .project-grid {
    grid-template-columns: 1fr;
  }
}

/* ============================================================
   页脚
   ============================================================ */

.footer {
  border-top: 1px solid var(--border);
  padding: 24px 0;
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.footer a {
  color: var(--text-secondary);
  text-decoration: none;
}

/* ============================================================
   动画
   ============================================================ */

.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================================
   管理员页面
   ============================================================ */

.admin-body {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
}

.login-box {
  width: 100%;
  max-width: 400px;
  padding: 40px;
}

.login-box h2 {
  text-align: center;
  margin-bottom: 32px;
  font-size: 1.5rem;
}

.login-error {
  color: #f87171;
  font-size: 0.85rem;
  text-align: center;
  margin-top: 12px;
  display: none;
}

.dashboard-wrap {
  padding-top: calc(var(--nav-height) + 32px);
}

.dashboard-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 32px;
}

.dashboard-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 28px;
  flex-wrap: wrap;
}

.dashboard-tab {
  padding: 8px 20px;
  border-radius: var(--radius);
  font-size: 0.85rem;
  cursor: pointer;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-secondary);
  transition: all var(--transition);
  font-family: var(--font-sans);
}

.dashboard-tab.active,
.dashboard-tab:hover {
  border-color: var(--accent-tech);
  color: var(--accent-tech);
  background: var(--accent-tech-dim);
}

.dashboard-content {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
}

.admin-field {
  margin-bottom: 18px;
}

/* 留言卡片 */
.msg-card {
  position: relative;
}

.msg-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
  flex-wrap: wrap;
  gap: 6px;
}

.msg-card-meta {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.msg-card-body {
  color: var(--text-secondary);
  white-space: pre-wrap;
  word-break: break-word;
  line-height: 1.7;
}

.msg-delete-btn {
  position: absolute;
  top: 12px;
  right: 12px;
  padding: 3px 10px;
  border: 1px solid rgba(255,100,100,0.3);
  border-radius: 4px;
  background: rgba(255,100,100,0.08);
  color: #ff6b6b;
  font-size: 0.72em;
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s;
}

.msg-delete-btn:hover {
  background: rgba(255,100,100,0.2);
  border-color: rgba(255,100,100,0.6);
}

.admin-field label {
  display: block;
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin-bottom: 4px;
  font-weight: 500;
}

.admin-field input,
.admin-field textarea {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.92rem;
  resize: vertical;
}

.admin-field textarea { min-height: 80px; }

.admin-field input:focus,
.admin-field textarea:focus {
  outline: none;
  border-color: var(--accent-tech);
}

.toast {
  position: fixed;
  bottom: 32px;
  right: 32px;
  background: #059669;
  color: #fff;
  padding: 12px 24px;
  border-radius: var(--radius);
  font-size: 0.9rem;
  opacity: 0;
  transform: translateY(10px);
  transition: all 0.3s ease;
  pointer-events: none;
  z-index: 200;
}

.toast.show { opacity: 1; transform: translateY(0); }
.toast.error { background: #dc2626; }

/* ============================================================
   个人照片
   ============================================================ */

.summary-wrapper {
  display: flex;
  gap: 28px;
  align-items: flex-start;
}

.profile-photo {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--border);
  box-shadow: 0 0 20px rgba(0,198,255,0.15);
  flex-shrink: 0;
}

body.sales-page .profile-photo {
  box-shadow: 0 0 20px rgba(167,139,250,0.15);
  border-color: var(--accent-sales-dim);
}

@media (max-width: 768px) {
  .summary-wrapper {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }
  .profile-photo {
    width: 110px;
    height: 110px;
  }
}

/* ============================================================
   响应式
   ============================================================ */

@media (max-width: 768px) {
  html { font-size: 15px; }

  .nav-links {
    display: none;
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: rgba(8,12,20,0.95);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: 20px 24px;
    gap: 6px;
  }

  .nav-links.open { display: flex; }

  .nav-links li a {
    display: block;
    padding: 12px 16px;
    font-size: 0.95em;
    min-height: 44px;
    line-height: 1.4;
  }

  .nav-toggle { display: flex; }

  .hero-name { font-size: 2.4rem; }

  .hero-scroll { display: none; }

  .card-grid-2,
  .card-grid-3,
  .card-grid-4 { grid-template-columns: 1fr; }

  .hero-info { gap: 16px; }

  .hero-actions { flex-direction: column; align-items: center; }

  .section { padding: 48px 0; }

  .timeline { padding-left: 24px; }

  .dashboard-tabs { flex-direction: column; }

  .dashboard-tab { text-align: center; }

  .contact-card { flex-direction: column; align-items: flex-start; }

  /* 表格在手机上允许横向滚动 */
  .cmd-table {
    font-size: 0.7em;
  }
  .cmd-table td,
  .cmd-table th {
    padding: 5px 8px;
  }
  .cmd-table code {
    font-size: 0.85em;
  }

  /* 通用表格溢出包裹 */
  .table-wrap {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin: 0 -10px;
    padding: 0 10px;
  }

  /* 代码块手机端适配 */
  pre {
    font-size: 0.75em !important;
    padding: 12px !important;
  }

  code {
    font-size: 0.8em;
  }
}

/* 超小屏手机 (iPhone SE 等 375px) */
@media (max-width: 480px) {
  html { font-size: 14px; }

  .hero { min-height: auto; padding: 40px 0 60px; }

  .hero-name { font-size: 2rem; }

  .nav-links {
    padding: 14px 16px;
    gap: 2px;
  }

  .nav-links li a {
    padding: 10px 14px;
    font-size: 0.9em;
  }

  .hero-info {
    flex-direction: column;
    gap: 10px;
  }

  .hero-actions .btn {
    width: 100%;
    justify-content: center;
  }

  .section-title { font-size: 1.5rem; }

  .container { padding: 0 16px; }

  .cmd-table {
    font-size: 0.65em;
  }
  .cmd-table td,
  .cmd-table th {
    padding: 4px 6px;
  }
}

/* ============================================================
   AI 智能体聊天组件
   ============================================================ */

/* ---- 浮动气泡 ---- */
#z71-chat {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 9999;
  font-family: var(--font-sans);
}

.z71-chat-bubble {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: linear-gradient(135deg, #00d4ff, #6366f1);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 4px 20px rgba(0, 212, 255, 0.35);
  transition: transform 0.25s, box-shadow 0.25s, opacity 0.2s;
  position: relative;
}

.z71-chat-bubble:hover {
  transform: scale(1.08);
  box-shadow: 0 6px 28px rgba(0, 212, 255, 0.5);
}

.z71-chat-bubble.z71-hidden {
  opacity: 0;
  pointer-events: none;
  transform: scale(0.8);
}

/* 气泡脉冲动画 */
.z71-chat-bubble::after {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  border: 2px solid rgba(0, 212, 255, 0.4);
  animation: z71-pulse 2s ease-out infinite;
}

@keyframes z71-pulse {
  0%   { transform: scale(1); opacity: 1; }
  100% { transform: scale(1.5); opacity: 0; }
}

/* ---- 提示文字 ---- */
.z71-chat-hint {
  position: fixed;
  bottom: 84px;
  right: 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 0.75em;
  padding: 5px 12px;
  border-radius: 20px;
  cursor: pointer;
  white-space: nowrap;
  box-shadow: 0 2px 12px rgba(0,0,0,0.3);
  transition: opacity 0.2s, transform 0.2s;
  animation: z71-hint-bounce 3s ease-in-out infinite;
}

.z71-chat-hint.z71-hidden {
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px);
}

@keyframes z71-hint-bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-4px); }
}

/* ---- 聊天面板 ---- */
.z71-chat-panel {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 380px;
  max-height: 560px;
  height: calc(100vh - 120px);
  max-height: min(560px, calc(100vh - 80px));
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: 0 12px 48px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(0, 212, 255, 0.08);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transform: translateY(16px) scale(0.95);
  opacity: 0;
  pointer-events: none;
  transition: transform 0.25s, opacity 0.2s;
}

.z71-chat-panel.z71-open {
  transform: translateY(0) scale(1);
  opacity: 1;
  pointer-events: auto;
}

/* ---- 面板头部 ---- */
.z71-chat-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
  background: rgba(0, 0, 0, 0.2);
  flex-shrink: 0;
}

.z71-chat-header-left {
  display: flex;
  align-items: center;
  gap: 10px;
}

.z71-chat-avatar {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: linear-gradient(135deg, #00d4ff, #6366f1);
  color: #fff;
  font-size: 0.7em;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
}

.z71-chat-header-title {
  font-size: 0.9em;
  font-weight: 600;
  color: var(--text-primary);
}

.z71-chat-header-sub {
  font-size: 0.7em;
  color: var(--text-muted);
}

.z71-chat-close {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 0.2s;
}

.z71-chat-close:hover {
  color: var(--text-primary);
}

/* ---- 引导问题 ---- */
.z71-chat-suggestions {
  padding: 10px 14px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  flex-shrink: 0;
}

.z71-suggestion-tag {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 14px;
  background: rgba(0, 212, 255, 0.08);
  color: #00d4ff;
  font-size: 0.72em;
  cursor: pointer;
  white-space: nowrap;
  border: 1px solid rgba(0, 212, 255, 0.15);
  transition: background 0.2s, border-color 0.2s;
}

.z71-suggestion-tag:hover {
  background: rgba(0, 212, 255, 0.18);
  border-color: rgba(0, 212, 255, 0.35);
}

/* ---- 消息区域 ---- */
.z71-chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  scroll-behavior: smooth;
}

.z71-chat-messages::-webkit-scrollbar {
  width: 4px;
}

.z71-chat-messages::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.08);
  border-radius: 2px;
}

.z71-msg {
  max-width: 88%;
  padding: 10px 14px;
  border-radius: 14px;
  font-size: 0.85em;
  line-height: 1.65;
  word-break: break-word;
  animation: z71-msg-in 0.2s ease-out;
}

@keyframes z71-msg-in {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

.z71-msg-user {
  align-self: flex-end;
  background: linear-gradient(135deg, #00d4ff, #6366f1);
  color: #fff;
  border-bottom-right-radius: 4px;
}

.z71-msg-ai {
  align-self: flex-start;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.06);
  color: var(--text-primary);
  border-bottom-left-radius: 4px;
}

.z71-msg-ai a {
  color: #00d4ff;
  text-decoration: none;
}

.z71-msg-ai a:hover {
  text-decoration: underline;
}

.z71-msg-ai strong {
  color: #fff;
}

.z71-msg-error {
  color: #ff6b6b;
}

/* ---- 输入区 ---- */
.z71-chat-input-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}

.z71-chat-input {
  flex: 1;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 8px 16px;
  color: var(--text-primary);
  font-size: 0.85em;
  font-family: var(--font-sans);
  outline: none;
  transition: border-color 0.2s;
}

.z71-chat-input:focus {
  border-color: rgba(0, 212, 255, 0.4);
}

.z71-chat-input::placeholder {
  color: var(--text-muted);
}

.z71-chat-input:disabled {
  opacity: 0.5;
}

.z71-chat-send {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: none;
  background: linear-gradient(135deg, #00d4ff, #6366f1);
  color: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: opacity 0.2s, transform 0.15s;
}

.z71-chat-send:hover {
  opacity: 0.9;
  transform: scale(1.05);
}

.z71-chat-send:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none;
}

/* ---- 移动端适配 ---- */
@media (max-width: 480px) {
  .z71-chat-panel {
    width: calc(100vw - 16px);
    right: 8px;
    bottom: 8px;
    max-height: calc(100vh - 16px);
    border-radius: 12px;
  }

  .z71-chat-bubble {
    bottom: 16px;
    right: 16px;
    width: 48px;
    height: 48px;
  }

  .z71-chat-hint {
    bottom: 72px;
    right: 12px;
    font-size: 0.7em;
  }

  .z71-chat-input {
    font-size: 0.82em;
  }

  .z71-msg {
    font-size: 0.82em;
  }
}