/* 南京乐之芯 - 网站重构样式 v2.0 */
/* 移动端优先，PC 自适应 */

:root {
  --primary: #1a73e8;
  --primary-dark: #1557b0;
  --secondary: #28a745;
  --warning: #ffc107;
  --danger: #dc3545;
  --text: #333;
  --text-light: #666;
  --bg-light: #f8f9fa;
  --border: #e9ecef;
  --shadow: 0 2px 8px rgba(0,0,0,0.1);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  color: var(--text);
  background: #fff;
}

a { text-decoration: none; color: inherit; }
ul { list-style: none; }

/* 容器 */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 15px;
}

/* 导航栏 */
.navbar {
  background: #fff;
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px;
}

.logo {
  font-size: 1.5rem;
  font-weight: bold;
  color: var(--primary);
}

.logo span { font-size: 0.9rem; color: var(--text-light); }

.nav-links {
  display: flex;
  gap: 20px;
}

.nav-links a {
  padding: 8px 15px;
  border-radius: 5px;
  transition: background 0.3s;
}

.nav-links a:hover { background: var(--bg-light); }

.cta-btn {
  background: var(--primary);
  color: #fff;
  padding: 10px 20px;
  border-radius: 5px;
  font-weight: bold;
  font-size: 15px;
  transition: background 0.3s;
  display: inline-block;
}

.cta-btn:hover { 
  background: var(--primary-dark); 
  color: #fff;
}

/* Hero 区域 */
.hero {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: #fff;
  padding: 60px 0;
  text-align: center;
}

.hero h1 {
  font-size: 2.5rem;
  margin-bottom: 15px;
}

.hero p {
  font-size: 1.2rem;
  margin-bottom: 30px;
  opacity: 0.9;
}

.hero-buttons {
  display: flex;
  gap: 15px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn-primary {
  background: #ff6b35;
  color: #fff;
  padding: 15px 30px;
  border-radius: 8px;
  font-size: 1.1rem;
  font-weight: bold;
  transition: transform 0.2s;
}

.btn-primary:hover {
  transform: translateY(-2px);
  background: #218838;
}

.btn-outline {
  background: transparent;
  border: 2px solid #fff;
  color: #fff;
  padding: 15px 30px;
  border-radius: 8px;
  font-size: 1.1rem;
  font-weight: bold;
  transition: background 0.3s;
}

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

/* 分类入口 */
.categories {
  padding: 50px 0;
  background: var(--bg-light);
}

.categories h2 {
  text-align: center;
  font-size: 2rem;
  margin-bottom: 40px;
}

.category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
}

.category-card {
  background: #fff;
  padding: 30px;
  border-radius: 10px;
  box-shadow: var(--shadow);
  text-align: center;
  transition: transform 0.3s;
  cursor: pointer;
}

.category-card:hover {
  transform: translateY(-5px);
}

.category-icon {
  font-size: 3rem;
  margin-bottom: 15px;
}

.category-card h3 {
  color: var(--primary);
  margin-bottom: 10px;
}

.category-card p {
  color: var(--text-light);
  font-size: 0.95rem;
}

/* 特性区块 */
.features {
  padding: 50px 0;
}

.features h2 {
  text-align: center;
  font-size: 2rem;
  margin-bottom: 40px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 30px;
}

.feature-item {
  text-align: center;
  padding: 20px;
}

.feature-icon {
  font-size: 2.5rem;
  margin-bottom: 15px;
}

.feature-item h4 {
  color: var(--primary);
  margin-bottom: 10px;
}

/* 案例展示 */
.cases {
  padding: 50px 0;
  background: var(--bg-light);
}

.cases h2 {
  text-align: center;
  font-size: 2rem;
  margin-bottom: 40px;
}

.case-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
}

.case-card {
  background: #fff;
  padding: 25px;
  border-radius: 10px;
  box-shadow: var(--shadow);
  border-left: 4px solid var(--primary);
}

.case-card h4 {
  color: var(--primary);
  margin-bottom: 10px;
}

.case-stats {
  display: flex;
  gap: 20px;
  margin: 15px 0;
  flex-wrap: wrap;
}

.stat {
  background: var(--bg-light);
  padding: 10px 15px;
  border-radius: 5px;
}

.stat strong {
  color: var(--primary);
  font-size: 1.2rem;
}

/* 文章列表 */
.articles {
  padding: 50px 0;
}

.articles h2 {
  text-align: center;
  font-size: 2rem;
  margin-bottom: 40px;
}

.article-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
}

.article-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 25px;
  transition: box-shadow 0.3s;
}

.article-card:hover {
  box-shadow: var(--shadow);
}

.article-tag {
  display: inline-block;
  background: var(--primary);
  color: #fff;
  padding: 5px 10px;
  border-radius: 3px;
  font-size: 0.8rem;
  margin-bottom: 10px;
}

.article-card h3 {
  margin-bottom: 10px;
  line-height: 1.4;
}

.article-card p {
  color: var(--text-light);
  font-size: 0.95rem;
  margin-bottom: 15px;
}

.article-meta {
  display: flex;
  justify-content: space-between;
  color: var(--text-light);
  font-size: 0.9rem;
}

/* 评估表单 */
.assessment {
  padding: 50px 0;
  background: var(--bg-light);
}

.assessment-form {
  max-width: 600px;
  margin: 0 auto;
  background: #fff;
  padding: 40px;
  border-radius: 10px;
  box-shadow: var(--shadow);
}

.assessment-form h2 {
  text-align: center;
  margin-bottom: 30px;
}

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

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: bold;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 15px;
  border: 1px solid var(--border);
  border-radius: 5px;
  font-size: 1rem;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
}

.btn-submit {
  width: 100%;
  background: var(--primary);
  color: #fff;
  padding: 15px;
  border: none;
  border-radius: 5px;
  font-size: 1.1rem;
  font-weight: bold;
  cursor: pointer;
  transition: background 0.3s;
}

.btn-submit:hover {
  background: var(--primary-dark);
}

/* 专题页 */
.topic-page {
  padding: 50px 0;
}

.topic-header {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: #fff;
  padding: 60px 0;
  text-align: center;
  margin-bottom: 40px;
}

.topic-header h1 {
  font-size: 2.5rem;
  margin-bottom: 15px;
}

.topic-content {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 15px;
}

.topic-section {
  margin-bottom: 40px;
}

.topic-section h2 {
  color: var(--primary);
  border-bottom: 2px solid var(--primary);
  padding-bottom: 10px;
  margin-bottom: 20px;
}

.topic-section h3 {
  color: var(--text);
  margin: 25px 0 15px;
}

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

.rate-table th,
.rate-table td {
  border: 1px solid var(--border);
  padding: 12px 15px;
  text-align: left;
}

.rate-table th {
  background: var(--bg-light);
  font-weight: bold;
}

.rate-table tr:nth-child(even) {
  background: var(--bg-light);
}

/* 计算器 */
.calculator {
  padding: 50px 0;
  max-width: 600px;
  margin: 0 auto;
}

.calculator-box {
  background: #fff;
  padding: 40px;
  border-radius: 10px;
  box-shadow: var(--shadow);
}

.calculator-box h2 {
  text-align: center;
  margin-bottom: 30px;
}

.result-box {
  background: var(--bg-light);
  padding: 20px;
  border-radius: 5px;
  margin-top: 20px;
  text-align: center;
}

.result-box h3 {
  color: var(--primary);
  font-size: 2rem;
  margin-bottom: 10px;
}

/* 页脚 */
.footer {
  background: #2c3e50;
  color: #fff;
  padding: 40px 0 20px;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  margin-bottom: 30px;
}

.footer-grid h4 {
  margin-bottom: 15px;
  color: var(--warning);
  font-size: 16px;
  font-weight: 600;
}

.footer-grid ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-grid ul li {
  margin-bottom: 10px;
}

.footer-grid ul li a {
  color: rgba(255,255,255,0.85);
  transition: color 0.3s;
}

.footer-grid ul li a:hover {
  color: var(--warning);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
  margin-bottom: 30px;
}

.footer h4 {
  margin-bottom: 15px;
  color: var(--warning);
}

.footer ul li {
  margin-bottom: 10px;
}

.footer ul li a:hover {
  color: var(--warning);
}

.footer-bottom {
  text-align: center;
  padding-top: 20px;
  border-top: 1px solid rgba(255,255,255,0.1);
  color: rgba(255,255,255,0.7);
}

/* 浮动咨询按钮 */
.float-consult {
  position: fixed;
  bottom: 30px;
  right: 30px;
  z-index: 999;
}

.float-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--secondary);
  color: #fff;
  padding: 15px 25px;
  border-radius: 50px;
  box-shadow: 0 4px 15px rgba(40,167,69,0.4);
  cursor: pointer;
  transition: transform 0.3s;
}

.float-btn:hover {
  transform: translateY(-3px);
}

.float-btn-icon {
  font-size: 1.5rem;
}

/* ========== 移动端适配 - 2026-04-22 最终优化版 ========== */
/* 核心：加宽可视区域，减少下滑，Logo 缩小，导航全显示 */

@media (max-width: 768px) {
  /* ===== 全局 ===== */
  * {
    -webkit-tap-highlight-color: transparent;
  }
  
  body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-size: 15px;
    line-height: 1.6;
    color: #1a1a1a;
    background: #f7f8fa;
    -webkit-font-smoothing: antialiased;
  }
  
  /* ===== 导航栏（Logo 缩小 + 5 链接全显示）===== */
  .navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: #fff;
    box-shadow: 0 1px 4px rgba(0,0,0,0.06);
    z-index: 1000;
  }
  
  .navbar .container {
    padding: 0;
    max-width: 100%;
  }
  
  .nav-top {
    padding: 10px 14px;
    border-bottom: 1px solid #f5f5f5;
  }
  
  .logo {
    display: inline-block;
    font-size: 16px;
    font-weight: 700;
    color: #1a56db;
    text-decoration: none;
    letter-spacing: 0.5px;
    white-space: nowrap;
  }
  
  .nav-bottom {
    padding: 8px 0;
    background: #fff;
  }
  
  .nav-links {
    display: flex;
    gap: 5px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    padding: 0 14px;
  }
  
  .nav-links::-webkit-scrollbar {
    display: none;
  }
  
  .nav-links a {
    padding: 6px 11px;
    font-size: 12px;
    font-weight: 500;
    color: #4a4a4a;
    background: #f7f8fa;
    border-radius: 16px;
    text-decoration: none;
    white-space: nowrap;
    flex-shrink: 0;
  }
  
  .nav-links a:active {
    background: #1a56db;
    color: #fff;
  }
  
  /* ===== Hero 区域（加宽）===== */
  .hero {
    padding: 85px 14px 35px;
    background: linear-gradient(135deg, #1a56db 0%, #2563eb 100%);
  }
  
  .hero h1 {
    font-size: 22px;
    font-weight: 700;
    color: #fff;
    line-height: 1.35;
    margin-bottom: 8px;
  }
  
  .hero p {
    font-size: 14px;
    color: rgba(255,255,255,0.92);
    margin-bottom: 18px;
  }
  
  .hero-buttons {
    display: flex;
    gap: 10px;
  }
  
  .btn-primary,
  .btn-outline {
    flex: 1;
    padding: 11px 14px;
    font-size: 14px;
    font-weight: 600;
    border-radius: 8px;
    text-align: center;
    text-decoration: none;
  }
  
  .btn-primary {
    background: #fff;
    color: #1a56db;
  }
  
  .btn-outline {
    background: rgba(255,255,255,0.12);
    color: #fff;
    border: 1px solid rgba(255,255,255,0.35);
  }
  
  /* ===== 分类卡片（加宽，减少 padding）===== */
  .categories {
    padding: 30px 14px;
    background: #f7f8fa;
  }
  
  .categories h2 {
    font-size: 19px;
    font-weight: 700;
    color: #1a1a1a;
    margin-bottom: 6px;
    text-align: center;
  }
  
  .categories > .container > p {
    font-size: 13px;
    color: #666;
    text-align: center;
    margin-bottom: 20px;
  }
  
  .category-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }
  
  .category-card {
    background: #fff;
    padding: 14px 10px;
    border-radius: 8px;
    box-shadow: 0 2px 6px rgba(0,0,0,0.04);
    text-decoration: none;
  }
  
  .category-icon {
    font-size: 24px;
    margin-bottom: 8px;
  }
  
  .category-card h3 {
    font-size: 14px;
    font-weight: 600;
    color: #1a1a1a;
    margin-bottom: 5px;
  }
  
  .category-card p {
    font-size: 11px;
    color: #666;
    line-height: 1.45;
  }
  
  /* ===== 特性网格（加宽）===== */
  .features {
    padding: 30px 14px;
    background: #fff;
  }
  
  .features h2 {
    font-size: 19px;
    font-weight: 700;
    color: #1a1a1a;
    margin-bottom: 20px;
    text-align: center;
  }
  
  .feature-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }
  
  .feature-item {
    text-align: center;
    padding: 12px 8px;
    background: #f7f8fa;
    border-radius: 8px;
  }
  
  .feature-icon {
    font-size: 26px;
    color: #1a56db;
    margin-bottom: 8px;
  }
  
  .feature-item h4 {
    font-size: 13px;
    font-weight: 600;
    color: #1a1a1a;
    margin-bottom: 5px;
  }
  
  .feature-item p {
    font-size: 11px;
    color: #666;
    line-height: 1.45;
  }
  
  /* ===== 案例展示（加宽）===== */
  .cases {
    padding: 30px 14px;
    background: #f7f8fa;
  }
  
  .cases h2 {
    font-size: 19px;
    font-weight: 700;
    color: #1a1a1a;
    margin-bottom: 20px;
    text-align: center;
  }
  
  .case-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
  }
  
  .case-card {
    background: #fff;
    padding: 14px;
    border-radius: 8px;
    box-shadow: 0 2px 6px rgba(0,0,0,0.04);
    border-left: 4px solid #1a56db;
  }
  
  .case-card h4 {
    font-size: 15px;
    font-weight: 600;
    color: #1a1a1a;
    margin-bottom: 10px;
  }
  
  .case-card p {
    font-size: 13px;
    color: #4a4a4a;
    line-height: 1.6;
    margin-bottom: 10px;
  }
  
  .case-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 6px;
    margin: 12px 0;
    background: #f7f8fa;
    padding: 10px;
    border-radius: 6px;
  }
  
  .stat {
    text-align: center;
  }
  
  .stat strong {
    display: block;
    font-size: 17px;
    font-weight: 700;
    color: #1a56db;
    margin-bottom: 4px;
  }
  
  .stat span {
    display: block;
    font-size: 11px;
    color: #999;
  }
  
  /* ===== 文章列表（加宽）===== */
  .articles {
    padding: 30px 14px;
    background: #fff;
  }
  
  .articles h2 {
    font-size: 19px;
    font-weight: 700;
    color: #1a1a1a;
    margin-bottom: 20px;
    text-align: center;
  }
  
  .article-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
  }
  
  .article-card {
    background: #f7f8fa;
    padding: 14px;
    border-radius: 8px;
  }
  
  .article-tag {
    display: inline-block;
    background: #1a56db;
    color: #fff;
    padding: 3px 7px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 500;
    margin-bottom: 8px;
  }
  
  .article-card h3 {
    font-size: 15px;
    font-weight: 600;
    color: #1a1a1a;
    line-height: 1.45;
    margin-bottom: 6px;
  }
  
  .article-card p {
    font-size: 12px;
    color: #666;
    line-height: 1.55;
    margin-bottom: 10px;
  }
  
  /* ===== 评估表单 ===== */
  .assessment {
    padding: 30px 14px;
    background: #f7f8fa;
  }
  
  .assessment-form {
    background: #fff;
    padding: 20px 16px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
  }
  
  .assessment-form h2 {
    font-size: 19px;
    font-weight: 700;
    color: #1a1a1a;
    margin-bottom: 20px;
    text-align: center;
  }
  
  /* ===== 计算器 ===== */
  .calculator {
    padding: 30px 14px;
    background: #fff;
  }
  
  .calculator-box {
    background: #f7f8fa;
    padding: 20px 16px;
    border-radius: 8px;
  }
  
  /* ===== 页脚（3 列对齐）===== */
  .footer {
    padding: 35px 14px 20px;
    background: #1a1a1a;
  }
  
  .footer-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
    margin-bottom: 20px;
  }
  
  .footer-grid h4 {
    font-size: 13px;
    font-weight: 600;
    color: #fff;
    margin-bottom: 10px;
    letter-spacing: 0.3px;
  }
  
  .footer-grid ul {
    list-style: none;
    padding: 0;
    margin: 0;
  }
  
  .footer-grid li {
    font-size: 11px;
    color: #bbb;
    line-height: 1.9;
    margin-bottom: 3px;
  }
  
  .footer-grid a {
    color: #bbb;
    text-decoration: none;
  }
  
  .footer-bottom {
    text-align: center;
    padding-top: 15px;
    border-top: 1px solid #333;
  }
  
  .footer-bottom p {
    font-size: 11px;
    color: #888;
    line-height: 1.7;
    margin: 4px 0;
  }
  
  /* ===== 浮动按钮 ===== */
  .float-consult {
    position: fixed;
    bottom: 14px;
    right: 14px;
    z-index: 999;
  }
  
  .float-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    background: #1a56db;
    color: #fff;
    padding: 10px 16px;
    border-radius: 20px;
    box-shadow: 0 3px 12px rgba(26,86,219,0.35);
    font-size: 13px;
    font-weight: 600;
  }
  
  .float-btn-icon {
    font-size: 16px;
  }
}

/* ========== 文章详情页移动端 - 2026-04-22 微信级别阅读体验 ========== */
/* 设计理念：微信公众号 × 得到 APP × 知乎专栏 */
/* 关键词：舒适、易读、呼吸感、层次清晰 */

@media (max-width: 768px) {
  /* ===== 文章 Hero（标题区）===== */
  .page-hero {
    padding: 85px 18px 28px;
    background: linear-gradient(135deg, #1a56db 0%, #2563eb 100%);
  }
  
  .page-hero h1 {
    font-size: 21px;
    font-weight: 700;
    color: #fff;
    line-height: 1.45;
    margin-bottom: 10px;
    letter-spacing: 0.3px;
  }
  
  .page-hero p {
    font-size: 13px;
    color: rgba(255,255,255,0.88);
    line-height: 1.5;
  }
  
  /* ===== 文章主体容器 ===== */
  .topic-content {
    background: #fff;
  }
  
  .article-body {
    padding: 32px 18px 55px;
    max-width: 100%;
  }
  
  /* ===== 章节间距 ===== */
  .topic-section {
    margin-bottom: 40px;
  }
  
  .topic-section:last-child {
    margin-bottom: 0;
  }
  
  /* ===== 标题层级（清晰、有节奏）===== */
  .article-body h2 {
    font-size: 18px;
    font-weight: 700;
    color: #1a1a1a;
    margin: 38px 0 18px;
    padding-left: 12px;
    border-left: 4px solid #1a56db;
    letter-spacing: 0.3px;
    line-height: 1.4;
  }
  
  .article-body h2:first-child {
    margin-top: 0;
  }
  
  .article-body h3 {
    font-size: 16px;
    font-weight: 600;
    color: #333;
    margin: 28px 0 12px;
    line-height: 1.45;
  }
  
  .article-body h4 {
    font-size: 15px;
    font-weight: 600;
    color: #444;
    margin: 24px 0 10px;
    line-height: 1.5;
  }
  
  /* ===== 正文（微信公众号级别）===== */
  .article-body p {
    font-size: 15px;
    line-height: 1.75;
    color: #333;
    margin-bottom: 16px;
    text-align: justify;
    letter-spacing: 0.2px;
    word-spacing: 0.5px;
  }
  
  /* 首段不缩进，段间留白 */
  .article-body p:first-of-type {
    margin-top: 0;
  }
  
  /* 加粗强调 */
  .article-body strong {
    font-weight: 600;
    color: #1a1a1a;
    letter-spacing: 0.3px;
  }
  
  /* ===== 列表（清晰易读）===== */
  .article-body ul,
  .article-body ol {
    margin: 22px 0;
    padding-left: 22px;
  }
  
  .article-body li {
    font-size: 15px;
    line-height: 1.7;
    margin-bottom: 10px;
    color: #4a4a4a;
    text-align: justify;
  }
  
  .article-body ul li::marker {
    color: #1a56db;
    font-weight: 600;
  }
  
  .article-body ol li::marker {
    color: #1a56db;
    font-weight: 600;
  }
  
  /* ===== 案例卡片（得到风格）===== */
  .case-grid {
    margin: 24px 0;
  }
  
  .case-card {
    background: #f7f8fa;
    padding: 18px;
    border-radius: 8px;
    border-left: 4px solid #1a56db;
    margin-bottom: 14px;
  }
  
  .case-card:last-child {
    margin-bottom: 0;
  }
  
  .case-card h4 {
    font-size: 15px;
    font-weight: 600;
    color: #1a1a1a;
    margin-bottom: 12px;
    line-height: 1.4;
  }
  
  .case-card p {
    font-size: 13px;
    color: #4a4a4a;
    line-height: 1.65;
    margin-bottom: 10px;
  }
  
  .case-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
    margin: 14px 0 0;
    background: #fff;
    padding: 12px;
    border-radius: 6px;
  }
  
  .stat {
    text-align: center;
  }
  
  .stat strong {
    display: block;
    font-size: 17px;
    font-weight: 700;
    color: #1a56db;
    margin-bottom: 4px;
  }
  
  .stat span {
    display: block;
    font-size: 11px;
    color: #999;
  }
  
  /* ===== CTA 按钮（文章内）===== */
  .cta-btn {
    display: block;
    width: 100%;
    text-align: center;
    padding: 14px 24px;
    font-size: 15px;
    font-weight: 600;
    background: #ff6b35;
    color: #fff;
    border-radius: 8px;
    text-decoration: none;
    margin: 26px 0;
    box-shadow: 0 2px 10px rgba(26,86,219,0.25);
    transition: all 0.2s ease;
  }
  
  .cta-btn:active {
    transform: scale(0.98);
    box-shadow: 0 1px 6px rgba(26,86,219,0.2);
  }
  
  /* ===== 重点提示框（引用）===== */
  .article-body blockquote {
    background: #f0f7ff;
    border-left: 4px solid #1a56db;
    padding: 18px 20px;
    margin: 26px 0;
    border-radius: 0 8px 8px 0;
  }
  
  .article-body blockquote p {
    margin-bottom: 0;
    color: #1a56db;
    font-weight: 500;
    font-size: 15px;
    line-height: 1.7;
  }
  
  /* ===== 分隔线 ===== */
  .article-body hr {
    border: none;
    border-top: 1px solid #e5e7eb;
    margin: 40px 0;
  }
  
  /* ===== 图片 ===== */
  .article-body img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    margin: 24px 0;
    box-shadow: 0 2px 10px rgba(0,0,0,0.08);
  }
  
  /* ===== 表格（如有）===== */
  .article-body table {
    width: 100%;
    border-collapse: collapse;
    margin: 24px 0;
    font-size: 14px;
  }
  
  .article-body th {
    background: #f7f8fa;
    padding: 12px 10px;
    text-align: left;
    font-weight: 600;
    color: #1a1a1a;
    border-bottom: 2px solid #e5e7eb;
  }
  
  .article-body td {
    padding: 12px 10px;
    border-bottom: 1px solid #e5e7eb;
    color: #4a4a4a;
  }
  
  /* ===== 代码块（如有）===== */
  .article-body code {
    background: #f7f8fa;
    padding: 2px 6px;
    border-radius: 4px;
    font-family: "SF Mono", Monaco, Consolas, monospace;
    font-size: 13px;
    color: #d9465f;
  }
  
  .article-body pre {
    background: #1a1a1a;
    color: #f8f8f2;
    padding: 18px;
    border-radius: 8px;
    overflow-x: auto;
    margin: 24px 0;
    font-size: 13px;
    line-height: 1.6;
  }
  
  .article-body pre code {
    background: transparent;
    color: inherit;
    padding: 0;
  }
}

/* 小屏微调（iPhone SE 等） */
@media (max-width: 375px) {
  .article-body {
    padding: 28px 16px 50px;
  }
  
  .page-hero h1 {
    font-size: 19px;
  }
  
  .article-body p {
    font-size: 14px;
    line-height: 1.7;
  }
  
  .article-body h2 {
    font-size: 17px;
  }
  
  .article-body h3 {
    font-size: 15px;
  }
  
  .case-stats {
    grid-template-columns: 1fr;
  }
}

/* 小屏微调 */
@media (max-width: 375px) {
  .article-body {
    padding: 24px 14px 40px;
  }
  
  .page-hero h1 {
    font-size: 19px;
  }
  
  .article-body p {
    font-size: 14px;
  }
}

/* ========== 工具类 ========== */

/* 简洁数据展示（about.html） */
.stats-simple {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 15px;
  margin: 25px 0;
}

.stat-item {
  text-align: center;
  padding: 12px 8px;
  background: #f7f8fa;
  border-radius: 6px;
}

.stat-number {
  font-size: 20px;
  font-weight: 700;
  color: #1a56db;
  margin-bottom: 6px;
  line-height: 1.2;
}

.stat-label {
  font-size: 11px;
  color: #666;
  line-height: 1.3;
}

@media (max-width: 768px) {
  .stats-simple {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }
  
  .stat-number {
    font-size: 18px;
  }
  
  .stat-label {
    font-size: 10px;
  }
}

/* 相关阅读模块 */
.related-articles {
  padding: 40px 0;
  background: #f7f8fa;
}

.related-articles h2 {
  font-size: 19px;
  font-weight: 700;
  color: #1a1a1a;
  margin-bottom: 20px;
  text-align: center;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.related-card {
  background: #fff;
  padding: 16px;
  border-radius: 8px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.04);
  transition: transform 0.2s;
}

.related-card:hover {
  transform: translateY(-2px);
}

.related-card h4 {
  font-size: 14px;
  font-weight: 600;
  color: #1a1a1a;
  margin-bottom: 6px;
  line-height: 1.4;
}

.related-card p {
  font-size: 12px;
  color: #666;
  line-height: 1.4;
}

@media (max-width: 768px) {
  .related-articles {
    padding: 30px 14px;
  }
  
  .related-grid {
    grid-template-columns: 1fr;
    gap: 10px;
  }
  
  .related-card {
    padding: 14px;
  }
  
  .related-card h4 {
    font-size: 15px;
  }
  
  .related-card p {
    font-size: 13px;
  }
}

/* ========== 公司照片墙（about.html）========== */

.office-gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin: 30px 0;
}

.gallery-item {
  background: #fff;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
  transition: transform 0.3s, box-shadow 0.3s;
}

.gallery-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 4px 16px rgba(0,0,0,0.12);
}

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

.gallery-caption {
  padding: 12px;
  text-align: center;
  font-size: 14px;
  font-weight: 600;
  color: #333;
  background: #f7f8fa;
  margin: 0;
}

@media (max-width: 768px) {
  .office-gallery {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
    margin: 15px 0;
  }
  
  .gallery-item img {
    height: 120px !important;
  }
  
  .gallery-caption {
    font-size: 12px;
    padding: 8px;
  }
}

@media (max-width: 480px) {
  .office-gallery {
    grid-template-columns: 1fr;
    gap: 8px;
    margin: 12px 0;
  }
  
  .gallery-item img {
    height: 140px !important;
  }
  
  .gallery-caption {
    font-size: 13px;
    padding: 10px;
  }
}