*{margin:0;padding:0;box-sizing:border-box}
body{font-family:-apple-system,'PingFang SC','Microsoft YaHei',sans-serif;background:#f8fafc;color:#1e293b;line-height:1.7}
.container{max-width:960px;margin:0 auto;padding:0 20px}
a{color:#6366f1;text-decoration:none}
a:hover{text-decoration:underline}

/* Header */
.header{background:#fff;border-bottom:1px solid #e2e8f0;position:sticky;top:0;z-index:100}
.header .container{display:flex;justify-content:space-between;align-items:center;padding:14px 20px}
.logo h1{font-size:20px;color:#1e293b}
.logo p{font-size:12px;color:#94a3b8;margin-top:1px}
.nav{display:flex;gap:20px}
.nav a{font-size:14px;color:#64748b;padding:4px 0;border-bottom:2px solid transparent}
.nav a:hover{color:#6366f1;border-bottom-color:#6366f1;text-decoration:none}

/* Hero */
.hero{background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);color:#fff;text-align:center;padding:60px 20px}
.hero h2{font-size:32px;font-weight:700;margin-bottom:8px}
.hero .hero-sub{font-size:16px;opacity:.85;margin-bottom:32px}
.hero-stats{display:flex;justify-content:center;gap:24px;flex-wrap:wrap}
.hero-stats .stat{text-align:center;min-width:120px}
.hero-stats .num{display:block;font-size:28px;font-weight:700}
.hero-stats .label{font-size:13px;opacity:.75}

/* Sections */
section{padding:48px 0}
.section-title{font-size:22px;font-weight:700;text-align:center;margin-bottom:28px;color:#1e293b}

/* Features */
.features{background:#fff}
.feature-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:20px}
.feature-card{background:#f8fafc;border:1px solid #e2e8f0;border-radius:12px;padding:24px;text-align:center}
.feature-card .icon{font-size:36px;margin-bottom:12px}
.feature-card h3{font-size:16px;margin-bottom:8px}
.feature-card p{font-size:13px;color:#64748b}

/* Article list */
.articles-preview{background:#f8fafc}
.article-list{max-width:700px;margin:0 auto}
.article-item{padding:16px;background:#fff;border:1px solid #e2e8f0;border-radius:10px;margin-bottom:10px}
.article-item h3{font-size:15px;margin-bottom:4px}
.article-item h3 a{color:#1e293b}
.article-item h3 a:hover{color:#6366f1}
.article-item .meta{font-size:12px;color:#94a3b8}
.loading-text{text-align:center;color:#94a3b8;padding:20px}

/* About */
.about{background:#fff}
.about-content{max-width:700px;margin:0 auto}
.about-content p{font-size:15px;margin-bottom:12px;color:#475569}

/* Contact */
.contact{background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);color:#fff;text-align:center;padding:40px 20px}
.contact .section-title{color:#fff}
.contact-cta{font-size:18px;font-weight:600;margin-top:12px}

/* Footer */
.footer{background:#1e293b;color:#94a3b8;text-align:center;padding:24px;font-size:13px}
.footer a{color:#818cf8}

/* Article page */
.article-page{max-width:750px;margin:40px auto;padding:0 20px}
.article-page h1{font-size:28px;margin-bottom:8px}
.article-page .article-meta{font-size:13px;color:#94a3b8;margin-bottom:24px;padding-bottom:16px;border-bottom:1px solid #e2e8f0}
.article-page .article-content{font-size:16px;line-height:1.9}
.article-page .article-content h2{font-size:22px;margin:28px 0 12px}
.article-page .article-content p{margin-bottom:16px;color:#475569}
.article-page .article-content ul{padding-left:20px;margin-bottom:16px}
.article-page .article-content li{margin-bottom:6px;color:#475569}