:root {
  --dark-bg: #14232c;
  --primary: #0f6cbd;
  --text: #4d4d4d;
}

a {
  color: var(--primary);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}

body {
  margin: 0;
  background: var(--dark-bg);
  color: var(--text);
  font-family: Arial, sans-serif;
  font-weight: 400;
  font-size: 18px;
}

.page {
  max-width: 1000px;
  margin: auto;
  padding: 50px 20px;
}

.article {
  line-height: 1.8;
}

.btn-home {
  display: inline-block;
  background: #fff;
  color: #0f6cbd;
  padding: 10px 18px;
  border-radius: 25px;
  text-decoration: none;
  margin-bottom: 25px;
}
.btn-home:hover {
  background: #0f6cbd;
  color: #fff;
  text-decoration: none;
}

.article {
  background: #ffffff;
  border-radius: 18px;
  padding: 50px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
  margin-bottom: 25px;
}

@media screen and (max-width: 768px) {
  .article {
    padding: 20px;
  }
  .tip, .warning, .success, .figure {
    padding: 8px;
  }
}

.article h1 {
  margin: 0 0 10px;
  font-size: 34px;
  color: var(--text);
  line-height: 1.2;
}

.hero p {
  margin: 0;
  opacity: 0.95;
}

img.banner {
  width: 100%;
  border-radius: 12px;
  margin-bottom: 20px;
}

.meta {
  color: #666;
  margin-bottom: 30px;
}

h2 {
  margin-top: 45px;
}

pre {
  background: #0e1726;
  color: #eaf2ff;
  padding: 18px;
  border-radius: 12px;
  overflow: auto;
}

.intro {
  background: #e8ebee;
  border-left: 5px solid var(--text);
  padding: 16px;
  border-radius: 10px;
  margin: 25px 0;
}

.tip {
  background: #f0fcff;
  border-left: 5px solid var(--primary);
  padding: 16px;
  border-radius: 10px;
  margin: 25px 0;
}

.warning {
  background: #fff5f5;
  border-left: 5px solid #e5484d;
  padding: 16px;
  border-radius: 10px;
  margin: 25px 0;
}

.success {
  background: #f0fff4;
  border-left: 5px solid #22c55e;
  padding: 16px;
  border-radius: 10px;
  margin: 25px 0;
}

.insight {
  margin-top: 50px;
  background: #f8f9fa;
  padding: 25px;
  border-radius: 14px;
  text-align: center;
}

.figure {
  display: inline-block;
  text-align: center;
  border: 1px solid #ddd;
  padding: 10px;
}

.figure img {
  max-width: 100%;
}

.figure figcaption {
  margin-top: 2px;
  font-size: 0.9rem;
  color: #666;
  font-weight: 600;
  background: #f8f9fa;
  padding: 5px;
}