:root{--navy:#1B2A4A;--gold:#E9C46A;--gold-light:#F4D97E;--blue:#2A6B9F;--blue-light:#3A8FD6;--sky:#E8F4FD;--white:#FFFFFF;--gray-50:#F8FAFC;--gray-100:#F1F5F9;--gray-200:#E2E8F0;--gray-600:#64748B;--gray-800:#1E293B;--orange:#E76F51}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:'Inter',sans-serif;background:var(--white);color:#1a1a2e;line-height:1.7}
h1,h2,h3,h4{font-family:'DM Serif Display',Georgia,serif;line-height:1.3}
.site-header{background:var(--navy);position:sticky;top:0;z-index:50;box-shadow:0 2px 16px rgba(0,0,0,0.15)}
.header-inner{max-width:1200px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;padding:0 24px;height:64px}
.logo{font-family:'DM Serif Display',serif;font-size:24px;color:var(--white);text-decoration:none}
.logo span{color:var(--gold)}
.nav-links{display:flex;gap:24px}
.nav-links a{color:rgba(255,255,255,0.8);text-decoration:none;font-size:14px;font-weight:500;transition:color 0.2s}
.nav-links a:hover{color:var(--gold)}
.hero{background:linear-gradient(135deg,var(--navy) 0%,#2A4A7F 50%,var(--blue) 100%);color:var(--white);padding:80px 24px 64px;position:relative;overflow:hidden}
.hero-inner{max-width:1200px;margin:0 auto;position:relative;z-index:1}
.hero h1{font-size:48px;margin-bottom:16px}
.hero p{font-size:18px;color:rgba(255,255,255,0.85);max-width:600px;margin-bottom:32px;line-height:1.6}
.hero-badge{display:inline-block;background:var(--gold);color:var(--navy);padding:6px 14px;border-radius:99px;font-size:13px;font-weight:700;margin-bottom:20px;text-transform:uppercase}
.hero-cta{display:inline-flex;align-items:center;gap:8px;background:var(--gold);color:var(--navy);padding:14px 32px;border-radius:99px;font-size:16px;font-weight:700;text-decoration:none;transition:transform 0.2s}
.hero-cta:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(233,196,106,0.3)}
.hero-secondary{display:inline-flex;align-items:center;gap:8px;border:2px solid rgba(255,255,255,0.3);color:var(--white);padding:14px 28px;border-radius:99px;font-size:16px;font-weight:600;text-decoration:none;margin-left:12px}
.hero-secondary:hover{border-color:var(--gold)}
.stats-bar{background:var(--white);border-bottom:1px solid var(--gray-200);padding:32px 24px}
.stats-inner{max-width:1200px;margin:0 auto;display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.stat-card{text-align:center;padding:16px}
.stat-number{font-family:'DM Serif Display',serif;font-size:36px;color:var(--navy);font-weight:700}
.stat-label{font-size:13px;color:var(--gray-600);margin-top:4px}
.section{padding:64px 24px}
.section:nth-child(even){background:var(--gray-50)}
.section-inner{max-width:1200px;margin:0 auto}
.section-title{font-size:32px;margin-bottom:8px;color:var(--navy)}
.section-subtitle{font-size:16px;color:var(--gray-600);margin-bottom:40px}
.article-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:20px}
.article-card{background:var(--white);border:1px solid var(--gray-200);border-radius:12px;overflow:hidden;transition:transform 0.2s}
.article-card:hover{transform:translateY(-4px);box-shadow:0 12px 32px rgba(0,0,0,0.08)}
.article-card-body{padding:16px 20px 20px}
.article-card-cat{display:inline-block;background:var(--sky);color:var(--blue);padding:2px 10px;border-radius:99px;font-size:11px;font-weight:600;margin-bottom:8px}
.article-card h3{font-size:18px;margin-bottom:8px}
.article-card h3 a{color:var(--navy);text-decoration:none}
.article-card h3 a:hover{color:var(--blue)}
.article-card p{font-size:14px;color:var(--gray-600);line-height:1.5}
.article-card-read{display:inline-block;margin-top:12px;color:var(--blue);font-size:13px;font-weight:600;text-decoration:none}
.article-page{max-width:800px;margin:0 auto;padding:48px 24px 64px}
.article-header{margin-bottom:32px}
.article-header h1{font-size:40px;margin-bottom:12px;color:var(--navy)}
.article-meta{color:var(--gray-600);font-size:14px;margin-bottom:16px}
.article-meta a{color:var(--blue);text-decoration:none}
.article-content{font-size:16px;line-height:1.8;color:#334155}
.article-content h2{font-size:28px;margin:40px 0 16px;color:var(--navy)}
.article-content h3{font-size:22px;margin:32px 0 12px;color:var(--navy)}
.article-content p{margin-bottom:16px}
.article-content ul,.article-content ol{margin-bottom:16px;padding-left:24px}
.article-content li{margin-bottom:8px}
.article-content table{width:100%;border-collapse:collapse;margin:24px 0}
.article-content th{background:var(--navy);color:var(--white);padding:10px 16px;text-align:left;font-size:14px}
.article-content td{padding:10px 16px;border-bottom:1px solid var(--gray-200);font-size:14px}
.article-content tr:nth-child(even) td{background:var(--gray-50)}
.article-content a{color:var(--blue)}
.article-content blockquote{border-left:4px solid var(--gold);padding:16px 20px;margin:24px 0;background:var(--gray-50);font-style:italic}
.article-content .tip-box{background:#FFF9E6;border:1px solid var(--gold);border-radius:8px;padding:16px 20px;margin:24px 0}
.article-content .warn-box{background:#FFF3F0;border:1px solid var(--orange);border-radius:8px;padding:16px 20px;margin:24px 0}
.toc{background:var(--gray-50);border:1px solid var(--gray-200);border-radius:8px;padding:20px 24px;margin:24px 0}
.toc h3{font-size:16px;margin-bottom:12px;color:var(--navy)}
.toc ol{padding-left:20px}
.toc li{margin-bottom:6px;font-size:14px}
.toc a{color:var(--blue);text-decoration:none}
.category-page{max-width:1200px;margin:0 auto;padding:48px 24px}
.category-header{margin-bottom:32px}
.category-header h1{font-size:36px;color:var(--navy);margin-bottom:8px}
.breadcrumb{font-size:13px;color:var(--gray-600);margin-bottom:16px}
.breadcrumb a{color:var(--blue);text-decoration:none}
.site-footer{background:var(--navy);color:rgba(255,255,255,0.6);padding:48px 24px}
.footer-inner{max-width:1200px;margin:0 auto;display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:32px}
.footer-brand h3{font-family:'DM Serif Display',serif;font-size:20px;color:var(--white);margin-bottom:8px}
.footer-brand h3 span{color:var(--gold)}
.footer-brand p{font-size:13px;line-height:1.6}
.footer-col h4{color:var(--white);font-size:14px;font-weight:600;margin-bottom:12px}
.footer-col a{display:block;color:rgba(255,255,255,0.5);text-decoration:none;font-size:13px;margin-bottom:8px}
.footer-col a:hover{color:var(--gold)}
.footer-bottom{text-align:center;border-top:1px solid rgba(255,255,255,0.1);padding-top:24px;margin-top:32px;font-size:13px}
.tool-page{max-width:900px;margin:0 auto;padding:48px 24px}
.tool-header{margin-bottom:32px}
.tool-header h1{font-size:36px;color:var(--navy);margin-bottom:8px}
.tool-container{background:var(--white);border:1px solid var(--gray-200);border-radius:12px;padding:32px}
.quiz-question{margin-bottom:24px}
.quiz-option{display:block;width:100%;text-align:left;padding:12px 16px;border:1px solid var(--gray-200);border-radius:8px;margin-bottom:8px;background:var(--white);cursor:pointer;font-size:14px;transition:all 0.2s}
.quiz-option:hover{border-color:var(--blue);background:var(--sky)}
.quiz-option.correct{border-color:#22C55E;background:#F0FDF4}
.quiz-option.wrong{border-color:#EF4444;background:#FEF2F2}
.quiz-explanation{background:var(--gray-50);padding:16px;border-radius:8px;margin-top:12px;font-size:14px;border-left:3px solid var(--blue)}
.quiz-progress-bar{height:8px;background:var(--gray-200);border-radius:4px;overflow:hidden}
.quiz-progress-fill{height:100%;background:var(--blue);border-radius:4px;transition:width 0.3s}
.quiz-score{text-align:center;padding:32px}
@media(max-width:768px){
  .hero h1{font-size:32px}
  .hero-cta,.hero-secondary{display:block;text-align:center;margin-left:0;margin-bottom:12px}
  .stats-inner{grid-template-columns:repeat(2,1fr)}
  .footer-inner{grid-template-columns:1fr}
  .nav-links{display:none}
  .article-header h1{font-size:28px}
  .article-grid{grid-template-columns:1fr}
}