/* === Reset & Base === */
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:'Microsoft YaHei','PingFang SC','Hiragino Sans GB',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;line-height:1.8;color:#181C1F;background:#fff}
.container{max-width:1200px;margin:0 auto;padding:0 20px}
a{color:#007FFF;text-decoration:none;transition:color .2s}
a:hover{color:#0066CC}

/* === Top Bar === */
.top-bar{background:#181C1F;color:#fff;font-size:13px;padding:8px 0}
.top-bar .container{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:8px}
.top-bar-contact{display:flex;gap:20px;align-items:center}
.top-bar-contact span{opacity:.85}
.top-bar-stats{display:flex;gap:18px;align-items:center}
.top-bar-stats span{background:rgba(255,255,255,.1);padding:2px 10px;border-radius:3px;font-size:12px}

/* === Header & Nav === */
header{padding:16px 0;border-bottom:1px solid #e1e3e5;background:#fff;position:sticky;top:0;z-index:100}
nav{display:flex;justify-content:space-between;align-items:center}
.logo{display:flex;align-items:center}
.logo img{height:32px;width:auto;display:block}
.nav-links{display:flex;align-items:center;gap:6px}
.nav-links a{padding:6px 14px;text-decoration:none;color:#181C1F;font-weight:500;border-radius:4px;font-size:15px;transition:.2s}
.nav-links a:hover,.nav-links a.active{color:#007FFF;background:#F0F5FF}

/* === Breadcrumb === */
.breadcrumb{padding:12px 0;font-size:14px;color:#4C5157;border-bottom:1px solid #f0f0f0}
.breadcrumb a{color:#007FFF;text-decoration:none}
.breadcrumb a:hover{text-decoration:underline}
.breadcrumb span{margin:0 8px;color:#ccc}

/* === Hero === */
.hero{padding:70px 0;text-align:center}
h1{font-size:42px;font-weight:700;margin-bottom:18px;line-height:1.2}
.subtitle{font-size:19px;color:#4C5157;margin-bottom:35px;max-width:700px;margin-left:auto;margin-right:auto}
.cta-btn{display:inline-block;background:#007FFF;color:#fff;padding:15px 38px;text-decoration:none;border-radius:6px;font-size:17px;font-weight:600;transition:.2s;box-shadow:0 2px 8px rgba(0,127,255,.2)}
.cta-btn:hover{background:#0066CC;color:#fff;box-shadow:0 4px 16px rgba(0,127,255,.3);transform:translateY(-1px)}

/* === Stats Counter === */
.stats-bar{background:#F0F5FF;border-top:1px solid #D4E4FF;border-bottom:1px solid #D4E4FF;padding:30px 0}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;text-align:center}
.stat-item .stat-number{font-size:36px;font-weight:700;color:#007FFF;line-height:1.2}
.stat-item .stat-label{font-size:14px;color:#4C5157;margin-top:4px}

/* === Features === */
.features{padding:60px 0;background:#f6f6f7}
.features h2,.section-title{text-align:center;font-size:34px;margin-bottom:12px;font-weight:700}
.section-subtitle{text-align:center;color:#4C5157;font-size:16px;margin-bottom:45px}
.feature-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:28px}
.feature-card{background:#fff;padding:28px;border-radius:8px;box-shadow:0 1px 3px rgba(0,0,0,.06);transition:.2s}
.feature-card:hover{box-shadow:0 4px 12px rgba(0,0,0,.1);transform:translateY(-2px)}
.feature-card h3{font-size:20px;margin-bottom:10px;color:#181C1F}
.feature-card p{color:#4C5157;font-size:15px;line-height:1.7}

/* === Use Cases === */
.use-cases{padding:60px 0}
.usecase-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:28px}
.usecase-card{border:2px solid #e1e3e5;padding:30px;border-radius:10px;transition:.2s}
.usecase-card:hover{border-color:#007FFF;box-shadow:0 4px 12px rgba(0,127,255,.1)}
.usecase-card h3{font-size:22px;margin-bottom:12px;color:#007FFF}
.usecase-card ul{list-style:none;margin-top:14px}
.usecase-card li{padding:6px 0;color:#4C5157;font-size:15px;position:relative;padding-left:22px}
.usecase-card li::before{content:"✓";position:absolute;left:0;color:#007FFF;font-weight:700}

/* === Download Section === */
.download-section{padding:60px 0}
.download-section h2{text-align:center;font-size:34px;margin-bottom:40px}
.download-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:30px;max-width:900px;margin:0 auto}
.download-card{border:2px solid #e1e3e5;padding:30px;border-radius:8px;text-align:center;transition:.2s}
.download-card:hover{border-color:#007FFF}
.download-card h3{font-size:24px;margin-bottom:12px}
.download-card ul{list-style:none;margin:18px 0;text-align:left}
.download-card li{padding:7px 0;color:#4C5157}
.download-btn{display:inline-block;background:#181C1F;color:#fff;padding:13px 28px;text-decoration:none;border-radius:6px;font-weight:600;margin-top:12px;transition:.2s}
.download-btn:hover{background:#007FFF;color:#fff}

/* === News Section with Sidebar === */
.news-section{padding:60px 0;background:#f6f6f7}
.news-layout{display:grid;grid-template-columns:1fr 320px;gap:35px;align-items:start}
.news-list{display:grid;gap:22px}
.news-card{background:#fff;padding:24px;border-radius:8px;box-shadow:0 1px 3px rgba(0,0,0,.05);transition:.2s}
.news-card:hover{box-shadow:0 4px 12px rgba(0,0,0,.1)}
.news-card h3{font-size:18px;margin-bottom:8px}
.news-card h3 a{color:#181C1F;text-decoration:none}
.news-card h3 a:hover{color:#007FFF}
.news-card p{color:#4C5157;font-size:14px;line-height:1.7;margin-bottom:10px}
.news-meta{display:flex;gap:16px;font-size:13px;color:#999}
.news-more{display:inline-block;margin-top:20px;padding:10px 24px;border:2px solid #007FFF;color:#007FFF;border-radius:6px;font-weight:600;text-align:center}
.news-more:hover{background:#007FFF;color:#fff}

/* === Sidebar === */
.sidebar{display:flex;flex-direction:column;gap:24px}
.sidebar-box{background:#fff;padding:22px;border-radius:8px;box-shadow:0 1px 3px rgba(0,0,0,.05)}
.sidebar-box h3{font-size:17px;margin-bottom:14px;padding-bottom:10px;border-bottom:2px solid #007FFF;color:#181C1F}
.sidebar-box ul{list-style:none}
.sidebar-box li{padding:8px 0;border-bottom:1px solid #f0f0f0;font-size:14px}
.sidebar-box li:last-child{border-bottom:none}
.sidebar-box li a{color:#181C1F;text-decoration:none}
.sidebar-box li a:hover{color:#007FFF}
.sidebar-box li .date{float:right;color:#999;font-size:12px}
.sidebar-box li .count{float:right;color:#007FFF;font-size:13px;font-weight:600}

/* === Tag Cloud === */
.tag-cloud{display:flex;flex-wrap:wrap;gap:8px;margin-top:4px}
.tag-cloud a{display:inline-block;padding:4px 12px;background:#f0f0f0;color:#4C5157;border-radius:4px;font-size:13px;text-decoration:none;transition:.2s}
.tag-cloud a:hover{background:#007FFF;color:#fff}

/* === CTA Banner === */
.cta-banner{background:linear-gradient(112deg,#B521FF 0%,#654CFF 20%,#3266FF 69%,#007FFF 99%);padding:50px 0;text-align:center;color:#fff}
.cta-banner h2{color:#fff;font-size:30px;margin-bottom:14px}
.cta-banner p{color:rgba(255,255,255,.85);font-size:17px;margin-bottom:28px}
.cta-banner .cta-btn{background:#fff;color:#007FFF;box-shadow:0 2px 8px rgba(0,0,0,.15)}
.cta-banner .cta-btn:hover{background:#F0F5FF;color:#0066CC}

/* === Support/Guide === */
.support{padding:50px 0}
.support h2{text-align:center;font-size:34px;margin-bottom:25px}
.support p{max-width:800px;margin:0 auto;font-size:17px;color:#4C5157;line-height:1.8}

/* === Featured Article === */
.featured-article{background:linear-gradient(135deg,#F0F5FF,#D4E4FF);padding:35px;border-radius:10px;margin-bottom:28px;border-left:4px solid #007FFF}
.featured-article h3{font-size:22px;margin-bottom:10px}
.featured-article h3 a{color:#181C1F}
.featured-article h3 a:hover{color:#007FFF}
.featured-article p{color:#4C5157;font-size:15px;line-height:1.7;margin-bottom:10px}

/* === Enhanced Footer === */
footer{background:#181C1F;padding:50px 0 0;color:rgba(255,255,255,.7);margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:35px;padding-bottom:35px;border-bottom:1px solid rgba(255,255,255,.1)}
.footer-col h4{color:#fff;font-size:16px;margin-bottom:16px;font-weight:600}
.footer-col p{font-size:14px;line-height:1.8;color:rgba(255,255,255,.6)}
.footer-col ul{list-style:none}
.footer-col li{padding:5px 0}
.footer-col li a{color:rgba(255,255,255,.6);text-decoration:none;font-size:14px;transition:.2s}
.footer-col li a:hover{color:#3296FA}
.footer-col .contact-item{display:flex;align-items:center;gap:8px;padding:4px 0;font-size:14px}
.footer-bottom{padding:20px 0;text-align:center;font-size:13px;color:rgba(255,255,255,.4)}
.footer-bottom a{color:rgba(255,255,255,.5)}
.footer-bottom a:hover{color:#3296FA}
.footer-tags{margin-top:12px;display:flex;flex-wrap:wrap;gap:6px;justify-content:center}
.footer-tags a{display:inline-block;padding:2px 10px;background:rgba(255,255,255,.08);border-radius:3px;font-size:12px;color:rgba(255,255,255,.5)}
.footer-tags a:hover{background:rgba(0,127,255,.3);color:#fff}

/* === Article Detail === */
.article-detail{padding:40px 0}
.article-header{margin-bottom:30px}
.article-meta{display:flex;gap:20px;font-size:14px;color:#999;margin-top:12px;flex-wrap:wrap}
.article-cover{margin-bottom:30px;border-radius:10px;overflow:hidden}
.article-cover img{width:100%;height:auto;display:block}
.article-content{font-size:16px;line-height:1.9;color:#384146}
.article-content h2{font-size:26px;margin:35px 0 15px;color:#181C1F;border-left:4px solid #007FFF;padding-left:14px}
.article-content h3{font-size:20px;margin:25px 0 12px;color:#181C1F}
.article-content h4{font-size:18px;margin:20px 0 10px;color:#181C1F}
.article-content p{margin-bottom:16px}
.article-content ul,.article-content ol{margin:16px 0;padding-left:28px}
.article-content li{margin-bottom:8px}
.article-content pre{background:#1e1e1e;color:#d4d4d4;padding:20px;border-radius:8px;overflow-x:auto;margin:20px 0;font-size:14px;line-height:1.6}
.article-content code{font-family:'Fira Code','Consolas','Monaco',monospace}
.article-content blockquote{border-left:4px solid #007FFF;padding:12px 20px;background:#F0F5FF;margin:20px 0;border-radius:0 8px 8px 0}
.article-image{margin:25px 0;text-align:center}
.article-image img{max-width:100%;border-radius:8px;box-shadow:0 2px 12px rgba(0,0,0,.1)}
.image-caption{font-size:13px;color:#999;margin-top:8px}
.article-tags{margin-top:30px;display:flex;flex-wrap:wrap;gap:8px}
.article-tags .tag{display:inline-block;padding:4px 14px;background:#F0F5FF;color:#007FFF;border-radius:4px;font-size:13px}
.article-navigation{display:flex;justify-content:space-between;padding:30px 0;margin-top:30px;border-top:1px solid #e1e3e5}
.article-navigation a{color:#007FFF;font-size:15px}
.article-navigation a:hover{color:#0066CC}

/* === Responsive === */
@media(max-width:900px){
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .news-layout{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:repeat(2,1fr)}
  h1{font-size:32px}
  .features h2,.section-title,.download-section h2,.support h2{font-size:28px}
}
@media(max-width:600px){
  .top-bar .container{flex-direction:column;text-align:center}
  .top-bar-stats{justify-content:center}
  .nav-links{gap:2px}
  .nav-links a{padding:5px 8px;font-size:13px}
  .stats-grid{grid-template-columns:1fr 1fr}
  .stat-item .stat-number{font-size:28px}
  .hero{padding:40px 0}
  h1{font-size:26px}
  .footer-grid{grid-template-columns:1fr}
}