/* Base styles for article pages */
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Microsoft YaHei', 'PingFang SC', Arial, sans-serif; line-height: 1.8; color: #333; background: #f5f5f5; }
a { color: #52b548; text-decoration: none; }
a:hover { text-decoration: underline; }
header { background: linear-gradient(135deg, #1a8c3a, #2dab55); color: white; padding: 0; }
.header-main { padding: 15px 20px; display: flex; justify-content: space-between; align-items: center; }
.logo { font-size: 24px; font-weight: bold; }
.tagline { font-size: 14px; opacity: 0.9; }
nav { background: #1a5c2e; padding: 10px 20px; display: flex; gap: 25px; flex-wrap: wrap; }
nav a { color: white; font-size: 15px; }
nav a:hover { opacity: 0.8; }
main { max-width: 900px; margin: 30px auto; padding: 0 20px; }
.article-header { background: white; padding: 30px; border-radius: 8px; margin-bottom: 20px; }
.article-header h1 { font-size: 28px; color: #1a5c2e; margin-bottom: 15px; }
.article-meta { color: #888; font-size: 14px; }
.article-body { background: white; padding: 40px; border-radius: 8px; }
.article-body h2 { font-size: 22px; color: #2dab55; margin: 30px 0 15px; padding-bottom: 8px; border-bottom: 2px solid #e8f5e9; }
.article-body h3 { font-size: 18px; color: #333; margin: 20px 0 10px; }
.article-body p { margin-bottom: 15px; color: #555; }
.article-body ul, .article-body ol { margin: 15px 0 15px 25px; }
.article-body li { margin-bottom: 8px; color: #555; }
.article-body table { width: 100%; border-collapse: collapse; margin: 20px 0; }
.article-body th { background: #2dab55; color: white; padding: 12px; text-align: left; }
.article-body td { padding: 10px; border-bottom: 1px solid #eee; }
.article-body tr:hover { background: #f8f9fa; }
.lead { background: #e8f5e9; padding: 20px; border-radius: 8px; margin-bottom: 25px; font-size: 16px; }
.lead p { color: #2d6a3f; }
.formula { background: #f0f0f0; padding: 12px 20px; border-left: 4px solid #2dab55; font-family: monospace; font-size: 16px; margin: 15px 0; }
.cta-box { background: linear-gradient(135deg, #2dab55, #1a8c3a); color: white; padding: 25px; border-radius: 8px; margin: 30px 0; }
.cta-box h3 { color: white; margin-bottom: 10px; }
.cta-box p { color: rgba(255,255,255,0.9); }
.cta-box a { color: #ffe066; }
footer { background: #333; color: white; padding: 40px 20px; margin-top: 50px; }
.footer-content { max-width: 900px; margin: 0 auto; }
.footer-content h3 { margin-bottom: 15px; }
.footer-content p { margin-bottom: 8px; color: #ccc; }
.footer-content a { color: #8bc34a; }
.footer-bottom { text-align: center; padding-top: 20px; margin-top: 30px; border-top: 1px solid #555; color: #888; font-size: 13px; }