@charset "UTF-8";
:root {
  --primary-color: #2b6cb0;
  --primary-hover: #2c5282;
  --accent-color: #ed8936;
  --text-main: #2d3748;
  --text-muted: #718096;
  --bg-body: #f7fafc;
  --bg-card: #ffffff;
  --border-color: #e2e8f0;
  --max-width: 1100px;
  --header-height: 64px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--bg-body);
  color: var(--text-main);
  line-height: 1.6;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

header {
  background-color: var(--bg-card);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo a {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--primary-color);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 24px;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-main);
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.2s ease;
}

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

main {
  max-width: var(--max-width);
  width: 100%;
  margin: 24px auto;
  padding: 0 20px;
  flex: 1;
}

.hero-section {
  background: linear-gradient(135deg, #2b6cb0 0%, #4299e1 100%);
  color: #ffffff;
  padding: 40px 30px;
  border-radius: 8px;
  margin-bottom: 30px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

.hero-section h1 {
  font-size: 2rem;
  margin-bottom: 12px;
  font-weight: 700;
}

.hero-section p {
  font-size: 1.05rem;
  opacity: 0.9;
  max-width: 700px;
}

.notice-bar {
  background-color: #fffaf0;
  border: 1px solid #feebc8;
  color: #c05621;
  padding: 12px 16px;
  border-radius: 6px;
  font-size: 0.9rem;
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.section-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-left: 4px solid var(--primary-color);
  padding-left: 10px;
}

.grid-container {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 20px;
  margin-bottom: 30px;
}

.card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 20px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 12px rgba(0, 0, 0, 0.05);
}

.card h2, .card h3 {
  font-size: 1.1rem;
  margin-bottom: 8px;
}

.card h2 a, .card h3 a {
  text-decoration: none;
  color: var(--text-main);
}

.card h2 a:hover, .card h3 a:hover {
  color: var(--primary-color);
}

.card p {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border-color);
  padding-top: 12px;
}

.tag {
  background-color: #ebf8ff;
  color: #3182ce;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 500;
}

.btn {
  display: inline-block;
  background-color: var(--primary-color);
  color: #ffffff;
  padding: 8px 16px;
  border-radius: 4px;
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  border: none;
  cursor: pointer;
  transition: background-color 0.2s ease;
}

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

.btn-secondary {
  background-color: #edf2f7;
  color: var(--text-main);
}

.btn-secondary:hover {
  background-color: #e2e8f0;
}

article {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 30px;
  margin-bottom: 24px;
}

article h1 {
  font-size: 1.6rem;
  margin-bottom: 16px;
}

article p {
  margin-bottom: 14px;
  color: var(--text-main);
}

article ul, article ol {
  margin: 15px 0 15px 24px;
  color: var(--text-main);
}

article li {
  margin-bottom: 8px;
}

.download-box {
  background-color: #f0fff4;
  border: 1px solid #c6f6d5;
  padding: 20px;
  border-radius: 6px;
  margin: 20px 0;
}

.download-box h3 {
  color: #22543d;
  margin-bottom: 8px;
}

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: 6px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 10px;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  font-size: 0.95krem;
  font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(43, 108, 176, 0.1);
}

footer {
  background-color: var(--bg-card);
  border-top: 1px solid var(--border-color);
  padding: 24px 0;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-content {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: center;
}

.footer-links {
  display: flex;
  gap: 16px;
  list-style: none;
}

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

.footer-links a:hover {
  color: var(--primary-color);
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  .grid-container {
    grid-template-columns: 1fr;
  }
  .hero-section {
    padding: 30px 20px;
  }
  .hero-section h1 {
    font-size: 1.6rem;
  }
}