:root {
  --primary: #0f2c2f;
  --accent: #d4a373;
  --border: #e6e2dd;
  --ad-tag: #b7476c;
}
body {
  font-family: 'Inter', 'Segoe UI', system-ui, sans-serif;
  background: #fff;
  color: #1e1e1e;
  margin: 0;
  display: flex;
  min-height: 100vh;
}
.sidebar {
  width: 260px;
  background: #fefcf9;
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 2rem 1.5rem;
  position: fixed;
  top: 0; left: 0; bottom: 0;
  z-index: 1030;
  overflow-y: auto;
}
.sidebar .logo { font-size: 1.6rem; font-weight: 700; color: var(--primary); margin-bottom: 2.5rem; }
.sidebar .logo i { color: var(--accent); }
.nav-flex { flex-direction: column; display: flex; gap: 0.5rem; }
.sidebar .nav-link { color: #3a3a3a; padding: 0.7rem 1rem; border-radius: 10px; font-weight: 500; display: flex; align-items: center; gap: 0.7rem; }
.sidebar .nav-link i { width: 20px; text-align: center; color: #8a8a8a; }
.sidebar .nav-link:hover, .sidebar .nav-link.active { background: #f0ebe4; color: var(--primary); font-weight: 600; }
.sidebar .nav-link.active i { color: var(--accent); }
.bottom-actions { margin-top: auto; display: flex; flex-direction: column; gap: 0.8rem; }
.btn-outline-accent { border: 1px solid var(--accent); color: var(--primary); border-radius: 20px; padding: 0.5rem 1rem; font-weight: 500; background: transparent; }
.btn-solid-accent { background: var(--accent); color: white; border-radius: 20px; padding: 0.5rem 1rem; font-weight: 600; border: none; }

.main-content { margin-left: 260px; flex: 1; padding: 2rem 3rem; }

/* 调整文章主体的最大宽度，使其在排版上更舒适 */
.article-body { max-width: 100%; }

/* 相关文章样式定制 */
.related-sidebar {
  border-left: 1px solid var(--border);
  padding-left: 2rem;
}
.related-card {
  text-decoration: none;
  color: inherit;
  display: block;
  padding: 0.8rem 0;
  border-bottom: 1px dashed var(--border);
  transition: color 0.2s ease;
}
.related-card:last-child { border-bottom: none; }
.related-card:hover .related-title { color: var(--accent); }
.related-title { font-size: 0.95rem; font-weight: 600; line-height: 1.4; margin-bottom: 0.3rem; }

.mobile-nav { display: none; position: fixed; top: 0; left: 0; right: 0; z-index: 1040; background: rgba(255,255,255,0.95); backdrop-filter: blur(10px); border-bottom: 1px solid var(--border); padding: 0.8rem 1.2rem; }
.mobile-nav .navbar-brand { font-weight: 700; color: var(--primary); font-size: 1.3rem; }
.mobile-nav .navbar-toggler { border: none; padding: 0.4rem; font-size: 1.5rem; color: var(--primary); }
.mobile-menu { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(255,255,255,0.98); backdrop-filter: blur(15px); z-index: 1050; transform: translateX(-100%); transition: 0.3s; display: flex; flex-direction: column; padding: 2rem 1.5rem; }
.mobile-menu.show { transform: translateX(0); }
.mobile-menu .close-btn { align-self: flex-end; font-size: 1.8rem; background: none; border: none; color: var(--primary); margin-bottom: 2rem; }
.mobile-menu .nav-link { font-size: 1.2rem; padding: 1rem 0; border-bottom: 1px solid #f0ede8; color: #333; font-weight: 500; display: flex; align-items: center; gap: 0.8rem; }

@media (max-width: 992px) {
  .sidebar { width: 220px; }
  .main-content { margin-left: 220px; padding: 2rem 1.5rem; }
  /* 屏幕缩小时去掉右侧分割线并调整间距 */
  .related-sidebar { border-left: none; padding-left: 0; margin-top: 3rem; }
}
@media (max-width: 768px) {
  body { flex-direction: column; padding-top: 70px; }
  .sidebar { display: none; }
  .mobile-nav { display: flex; align-items: center; justify-content: space-between; }
  .main-content { margin-left: 0; padding: 1.5rem; }
  /* 移动端增加上边距，与正文形成视觉隔离 */
  .related-sidebar { border-left: none; padding-left: 0; margin-top: 2.5rem; }
}
h2 {font-size:18px !important;font-weight:bold;line-height:30px;height:30px;}
h3 {font-size:16px !important;font-weight:bold;line-height:30px;height:30px;}
.btn-outline-accent a {color:#000;text-decoration:none;}
.btn-solid-accent a {color:#fff;text-decoration:none;}
.breadcrumb-item a {text-decoration:none;}