:root {
  --biz-bg: #f8f9fa;
  --biz-card: #ffffff;
  --biz-primary: #1677ff;
  --biz-primary-light: #f0f7ff;
  --biz-text: #333333;
  --biz-text-secondary: #666666;
  --biz-border: #e8e8e8;
  --biz-radius: 4px;
}

* {
  font-family: "Microsoft Yahei", system-ui, -apple-system, sans-serif !important;
}

body {
  background-color: var(--biz-bg) !important;
  color: var(--biz-text) !important;
  line-height: 1.6 !important;
  padding-top: 0 !important;
}

.layout-navbar {
  position: relative !important;
  background: var(--biz-card) !important;
  border: none !important;
  box-shadow: none !important;
  margin: 0 !important;
  border-radius: 0 !important;
  padding: 12px 0 !important;
  border-bottom: 1px solid var(--biz-border) !important;
}

.landing-navbar .navbar-brand .app-brand-text {
  color: var(--biz-primary) !important;
  font-size: 20px !important;
  font-weight: 600 !important;
  letter-spacing: 0 !important;
}

.landing-navbar .nav-link {
  color: var(--biz-text) !important;
  font-size: 14px !important;
  font-weight: 400 !important;
  transition: color 0.2s !important;
  white-space: nowrap;
}

.landing-navbar .nav-link:hover {
  color: var(--biz-primary) !important;
}

.landing-navbar .btn-primary {
  background: var(--biz-primary) !important;
  border-color: var(--biz-primary) !important;
  font-size: 14px !important;
  padding: 7px 18px !important;
  border-radius: var(--biz-radius) !important;
  box-shadow: none !important;
}

.landing-navbar .btn-primary:hover {
  background: var(--biz-primary) !important;
  border-color: var(--biz-primary) !important;
  opacity: 0.85 !important;
}

.biz-card {
  background: linear-gradient(to bottom right, var(--biz-primary-light), var(--biz-card)) !important;
  border: 1px solid var(--biz-border) !important;
  border-radius: var(--biz-radius) !important;
  box-shadow: none !important;
  padding: 28px 20px;
}

.biz-icon-svg {
  width: 48px;
  height: 48px;
  margin-bottom: 16px;
  stroke: var(--biz-primary);
  fill: none;
  stroke-width: 1.5;
}

.biz-section-title {
  font-size: 18px;
  color: var(--biz-text);
  margin-bottom: 24px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--biz-border);
  font-weight: 600;
}

.biz-card-title {
  font-size: 16px;
  color: var(--biz-text);
  margin-bottom: 8px;
  font-weight: 600;
}

.biz-card-desc {
  font-size: 14px;
  color: var(--biz-text-secondary);
  margin-bottom: 20px;
}

.biz-btn {
  display: inline-block;
  border: 1px solid var(--biz-primary);
  color: var(--biz-primary);
  background: #fff;
  padding: 6px 16px;
  border-radius: var(--biz-radius);
  font-size: 14px;
  cursor: pointer;
  text-decoration: none !important;
  transition: all 0.2s;
}

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

.biz-btn-primary {
  background: var(--biz-primary) !important;
  color: #fff !important;
  border-color: var(--biz-primary) !important;
}

.biz-btn-primary:hover {
  opacity: 0.9 !important;
  background: var(--biz-primary) !important;
  color: #fff !important;
}

.biz-btn-ghost {
  border: 1px solid var(--biz-border) !important;
  color: var(--biz-text) !important;
  background: #fff !important;
}

.biz-btn-ghost:hover {
  border-color: var(--biz-primary) !important;
  color: var(--biz-primary) !important;
  background: #fff !important;
}

.biz-breadcrumb {
  font-size: 14px;
  color: var(--biz-text-secondary);
  margin-bottom: 16px;
}

.biz-breadcrumb span {
  color: var(--biz-text);
  font-weight: 600;
}

.biz-divider {
  border: none;
  border-top: 1px solid var(--biz-border);
  margin: 0;
}

.biz-list-item {
  display: flex;
  align-items: center;
  padding: 12px 0;
  border-bottom: 1px solid var(--biz-border);
}

.biz-list-item:last-child {
  border-bottom: none;
}

.biz-list-item a {
  color: var(--biz-text) !important;
  font-size: 14px !important;
  font-weight: 500 !important;
  text-decoration: none !important;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: color 0.2s !important;
}

.biz-list-item a:hover {
  color: var(--biz-primary) !important;
}

.biz-list-item a i {
  color: var(--biz-text-secondary) !important;
  font-size: 14px !important;
}

.biz-list-item a:hover i {
  color: var(--biz-primary) !important;
}

.biz-help-block {
  background: linear-gradient(to bottom right, var(--biz-primary-light), var(--biz-card));
  margin: 30px 8%;
  padding: 32px 24px;
  border: 1px solid var(--biz-border);
  border-radius: var(--biz-radius);
  text-align: center;
}

.biz-help-block h3 {
  font-size: 17px;
  color: var(--biz-text);
  margin-bottom: 12px;
  font-weight: 600;
}

.biz-help-block p {
  font-size: 14px;
  color: var(--biz-text-secondary);
  margin-bottom: 24px;
}

.biz-help-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.biz-back-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--biz-text-secondary) !important;
  font-size: 14px !important;
  text-decoration: none !important;
  padding: 6px 0;
  margin-bottom: 16px;
  transition: color 0.2s !important;
}

.biz-back-btn:hover {
  color: var(--biz-primary) !important;
}

.biz-category-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--biz-border);
  margin-bottom: 4px;
}

.biz-category-icon {
  width: 36px;
  height: 36px;
  stroke: var(--biz-primary);
  fill: none;
  stroke-width: 1.5;
  flex-shrink: 0;
}

.biz-category-header h4 {
  color: var(--biz-text) !important;
  font-size: 16px !important;
  font-weight: 600 !important;
  margin: 0 !important;
}

.biz-detail-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  font-weight: 600;
  color: var(--biz-text);
  margin-bottom: 16px;
}

.biz-detail-icon {
  width: 36px;
  height: 36px;
  stroke: var(--biz-primary);
  fill: none;
  stroke-width: 1.5;
  flex-shrink: 0;
}

.biz-article-content img {
  max-width: 100%;
  height: auto;
  border-radius: 4px;
}

.biz-article-content p {
  color: #333;
  font-size: 14px;
  line-height: 1.8;
}

.biz-article-content h1,
.biz-article-content h2,
.biz-article-content h3,
.biz-article-content h4,
.biz-article-content h5,
.biz-article-content h6 {
  color: #333;
  font-weight: 600;
}

.biz-article-content a {
  color: #1677ff;
  text-decoration: none;
}

.biz-article-content a:hover {
  text-decoration: underline;
}

@media (max-width: 768px) {
  .biz-help-block {
    margin: 20px 4% !important;
  }
}