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

body {
  font-family: "Microsoft YaHei", sans-serif;
  background: #f5f7fb;
  color: #333;
  line-height: 1.8;
}

a {
  text-decoration: none;
}

ul, ol {
  padding-left: 22px;
}

.container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
}

.header {
  background: #0f172a;
  color: #fff;
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 24px;
  font-weight: bold;
}
.logo-img {
  width: 42px;
  height: 42px;
  object-fit: contain;
  border-radius: 6px;
}
.menu {
  list-style: none;
  display: flex;
  gap: 24px;
}

.menu a {
  color: #fff;
  font-size: 16px;
}

.menu a:hover {
  color: #60a5fa;
}

.banner {
  background: linear-gradient(135deg, #1e3a8a, #0ea5e9);
  color: #fff;
  padding: 110px 0 100px;
}

.banner-text {
  max-width: 760px;
}

.banner-text h1 {
  font-size: 46px;
  margin: 16px 0 20px;
}

.banner-text p {
  font-size: 18px;
  margin-bottom: 30px;
}

.tag {
  display: inline-block;
  background: rgba(255,255,255,0.18);
  color: #fff;
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 14px;
}

.banner-btns {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  background: #2563eb;
  color: #fff;
  padding: 12px 26px;
  border-radius: 8px;
  transition: 0.3s;
  border: none;
}

.btn:hover {
  background: #1d4ed8;
}

.btn-light {
  background: #fff;
  color: #2563eb;
}

.btn-light:hover {
  background: #e5e7eb;
}

.section {
  padding: 70px 0;
}

.bg-light {
  background: #eef4ff;
}

.section-title {
  text-align: center;
  font-size: 32px;
  margin-bottom: 40px;
  color: #0f172a;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.card {
  background: #fff;
  padding: 26px;
  border-radius: 14px;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
}

.card h3 {
  margin-bottom: 12px;
  color: #1e3a8a;
}

.tutorial-card p {
  margin-bottom: 18px;
}

.more-btn {
  display: inline-block;
  color: #2563eb;
  font-weight: bold;
}

.article-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.article-item {
  background: #fff;
  padding: 24px;
  border-radius: 14px;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
}

.article-meta {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}

.article-meta span {
  background: #dbeafe;
  color: #1d4ed8;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 13px;
}

.article-item h3 {
  margin-bottom: 12px;
  color: #0f172a;
}

.read-more {
  display: inline-block;
  margin-top: 14px;
  color: #2563eb;
  font-weight: bold;
}

.about-blog {
  text-align: center;
  max-width: 900px;
}

.feature-list {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 20px;
}

.feature-list span {
  background: #dbeafe;
  color: #1d4ed8;
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 14px;
}

.center-btn {
  margin-top: 24px;
}

.footer {
  background: #0f172a;
  color: #fff;
  text-align: center;
  padding: 20px 0;
}

.author-page {
  min-height: calc(100vh - 140px);
  display: flex;
  align-items: center;
  padding: 60px 0;
}

.author-box {
  background: #fff;
  border-radius: 16px;
  padding: 50px 30px;
  text-align: center;
  max-width: 800px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.author-avatar {
  width: 100px;
  height: 100px;
  background: #2563eb;
  color: #fff;
  margin: 0 auto 20px;
  border-radius: 50%;
  font-size: 40px;
  line-height: 100px;
  font-weight: bold;
}

.author-box h1 {
  margin-bottom: 16px;
}

.author-name {
  font-weight: bold;
  margin-bottom: 16px;
}

.author-box p {
  margin-bottom: 14px;
  font-size: 17px;
}

.author-links {
  margin-top: 20px;
}

.article-banner {
  background: linear-gradient(135deg, #0f172a, #1d4ed8);
  color: #fff;
  padding: 70px 0;
}

.article-banner h1 {
  font-size: 38px;
  margin: 16px 0 10px;
}

.article-page {
  padding: 60px 0;
}

.article-content {
  background: #fff;
  padding: 36px;
  border-radius: 16px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
  max-width: 900px;
}

.article-content h2 {
  margin: 24px 0 14px;
  color: #0f172a;
}

.article-content p,
.article-content li {
  font-size: 17px;
}

.code-box {
  background: #0f172a;
  color: #e2e8f0;
  border-radius: 12px;
  padding: 18px;
  overflow-x: auto;
  margin-top: 10px;
}

.code-box pre {
  white-space: pre-wrap;
  word-break: break-word;
  font-family: Consolas, monospace;
}

.article-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 30px;
}

@media (max-width: 768px) {
  .nav {
    flex-direction: column;
    gap: 12px;
  }

  .menu {
    flex-wrap: wrap;
    justify-content: center;
  }

  .banner-text h1 {
    font-size: 32px;
  }

  .section-title {
    font-size: 26px;
  }

  .article-banner h1 {
    font-size: 28px;
  }

  .article-content {
    padding: 22px;
  }
}