html {
  font-size: 14px;
}

@media (min-width: 768px) {
  html {
    font-size: 16px;
  }
}

.btn:focus,
.btn:active:focus,
.btn-link.nav-link:focus,
.form-control:focus,
.form-check-input:focus {
  box-shadow:
    0 0 0 0.1rem white,
    0 0 0 0.25rem #258cfb;
}

html {
  position: relative;
  min-height: 100%;
}

body {
  margin-bottom: 60px;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  color: #333;
}

:root {
  --primary-color: #007bff;
  --secondary-color: #6c757d;
  --dark-color: #343a40;
  --light-color: #f8f9fa;
}

a.navbar-brand {
  white-space: normal;
  text-align: center;
  word-break: break-all;
  font-weight: bold;
  font-size: 1.5rem;
}

a {
  color: var(--primary-color);
  transition: color 0.3s ease;
}

a:hover {
  color: #0056b3;
  text-decoration: none;
}

.btn-primary {
  color: #fff;
  background-color: var(--primary-color);
  border-color: var(--primary-color);
  transition: all 0.3s ease;
}

.btn-primary:hover {
  background-color: #0056b3;
  border-color: #0056b3;
}

.card {
  transition:
    transform 0.3s ease,
    box-shadow 0.3s ease;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.markdown-content {
  line-height: 1.8;
}

.markdown-content h1,
.markdown-content h2,
.markdown-content h3 {
  margin-top: 2rem;
  margin-bottom: 1rem;
}

.markdown-content p {
  margin-bottom: 1rem;
}

.markdown-content ul,
.markdown-content ol {
  margin-bottom: 1rem;
  padding-left: 1.5rem;
}

/* 响应式调整 */
@media (max-width: 768px) {
  .hero-section {
    padding: 4rem 0;
  }

  .card-grid {
    grid-template-columns: 1fr;
  }
}

.form-floating > .form-control-plaintext::placeholder,
.form-floating > .form-control::placeholder {
  color: var(--bs-secondary-color);
  text-align: end;
}

.form-floating > .form-control-plaintext:focus::placeholder,
.form-floating > .form-control:focus::placeholder {
  text-align: start;
}

/* 页脚样式 */
.bg-tech-nav {
  background: #1a1a1a;
  backdrop-filter: blur(15px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  transition: all 0.3s ease;
}

.navbar-dark .navbar-nav .nav-link {
  color: rgba(255, 255, 255, 0.9);
  padding: 0.75rem 1.25rem;
  margin: 0 0.25rem;
  border-radius: 12px;
  transition: all 0.3s ease;
  font-weight: 500;
}

.navbar-dark .navbar-nav .nav-link:hover {
  color: #007bff;
  background: rgba(255, 255, 255, 0.1);
}

.dropdown-menu {
  background: #2a2a2a;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  padding: 0.5rem;
}

.dropdown-item {
  color: rgba(255, 255, 255, 0.9);
  padding: 0.5rem 1rem;
  border-radius: 8px;
}

.dropdown-item:hover {
  background: #007bff;
  color: white;
}



/* 页脚新样式 */
.footer {
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
  padding: 4rem 0 2rem;
  color: #fff;
  border-top: 3px solid #007bff;
}

.footer-logo {
  font-size: 2rem;
  font-weight: bold;
  color: #fff;
  margin-bottom: 1rem;
}

.footer-desc {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.95rem;
  line-height: 1.6;
}

.footer-title {
  color: #fff;
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  position: relative;
  padding-bottom: 0.5rem;
}

.footer-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 40px;
  height: 2px;
  background: linear-gradient(90deg, #007bff, #6c757d);
}

.footer-link {
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  transition: all 0.3s ease;
  display: block;
  padding: 0.3rem 0;
}

.footer-link:hover {
  color: #007bff;
  padding-left: 0.5rem;
}

.footer-link i {
  color: #007bff;
  width: 20px;
}

.footer-qrcode {
  background: rgba(255, 255, 255, 0.05);
  padding: 1rem;
  border-radius: 12px;
  text-align: center;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-qrcode img {
  background: #fff;
  padding: 0.5rem;
}

.footer-divider {
  border-color: rgba(255, 255, 255, 0.1);
  margin: 2rem 0;
}