/* ========================================
   tj-binance.com — OSChina (开源中国) Style
   Brand: 币界通 | Color: #3ca160
   ======================================== */

/* --- Reset & Base --- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{font-size:14px;-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Helvetica,Arial,sans-serif;color:#333;background:#f3f5f7;line-height:1.6;min-height:100vh}
a{color:#3ca160;text-decoration:none}
a:hover{color:#2d7a48;text-decoration:underline}
img{max-width:100%;height:auto}
ul,ol{list-style:none}
h1,h2,h3,h4,h5,h6{font-weight:600;line-height:1.35}

/* --- Header --- */
.osc-header{background:#2e2e2e;border-bottom:3px solid #3ca160;position:sticky;top:0;z-index:100}
.osc-header-inner{max-width:1200px;margin:0 auto;display:flex;align-items:center;height:52px;padding:0 16px;gap:16px}
.osc-logo{display:flex;align-items:center;gap:8px;flex-shrink:0;text-decoration:none}
.osc-logo img{width:32px;height:32px;border-radius:4px}
.osc-logo-text{font-size:18px;font-weight:700;color:#fff;letter-spacing:1px}
.osc-nav{display:flex;align-items:center;gap:0;flex:1;overflow:hidden}
.osc-nav-link{color:#ccc;font-size:14px;padding:0 14px;height:52px;display:inline-flex;align-items:center;white-space:nowrap;text-decoration:none;transition:color .2s,background .2s}
.osc-nav-link:hover{color:#fff;background:rgba(255,255,255,.08);text-decoration:none}
.osc-nav-dl{color:#3ca160;font-weight:600}
.osc-nav-dl:hover{color:#5fce80}
.osc-header-right{display:flex;align-items:center;gap:10px;flex-shrink:0}
.osc-search{background:#3a3a3a;border-radius:4px;padding:6px 14px;cursor:default;display:flex;align-items:center}
.osc-search-placeholder{color:#888;font-size:13px;white-space:nowrap}
.osc-lang{display:flex;gap:2px}
.osc-lang a{color:#999;font-size:12px;padding:3px 5px;border-radius:2px;text-decoration:none}
.osc-lang a:hover,.osc-lang a.active{color:#fff;background:#3ca160;text-decoration:none}
.osc-mob-toggle{display:none;background:none;border:none;color:#ccc;cursor:pointer;padding:4px}

/* --- Mobile Menu --- */
.osc-mob-menu{display:none;position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,.5);z-index:200}
.osc-mob-menu.open{display:block}
.osc-mob-panel{background:#fff;width:280px;height:100%;padding:16px;overflow-y:auto}
.osc-mob-panel a{display:block;padding:10px 0;color:#333;border-bottom:1px solid #eee;font-size:15px;text-decoration:none}
.osc-mob-panel a:hover{color:#3ca160}
.osc-mob-close{background:none;border:none;cursor:pointer;float:right;padding:4px;color:#666}
.osc-mob-cats{margin-top:12px;padding-top:12px;border-top:2px solid #3ca160}
.osc-mob-cats a{font-size:13px;padding:8px 0;color:#666}

/* --- Container --- */
.osc-container{max-width:1200px;margin:0 auto;padding:16px}

/* --- Breadcrumb --- */
.osc-breadcrumb{font-size:13px;color:#999;padding:8px 0;margin-bottom:12px}
.osc-breadcrumb a{color:#666}
.osc-breadcrumb a:hover{color:#3ca160}
.osc-sep{margin:0 6px;color:#ccc}
.osc-cur{color:#999}

/* --- Three-Column Home Grid --- */
.osc-home-grid{display:grid;grid-template-columns:200px 1fr 280px;gap:16px;align-items:start}

/* --- Left Sidebar --- */
.osc-sidebar-left .osc-widget{background:#fff;border-radius:4px;overflow:hidden;border:1px solid #e8e8e8}
.osc-cat-list li{border-bottom:1px solid #f0f0f0}
.osc-cat-list li:last-child{border-bottom:none}
.osc-cat-list a{display:flex;justify-content:space-between;align-items:center;padding:10px 14px;color:#555;font-size:13px;text-decoration:none;transition:background .15s}
.osc-cat-list a:hover{background:#f5faf7;color:#3ca160;text-decoration:none}
.osc-cat-name{flex:1}
.osc-cat-count{background:#f0f0f0;color:#999;font-size:11px;padding:1px 6px;border-radius:8px;min-width:22px;text-align:center}

/* --- Center Feed --- */
.osc-feed{background:#fff;border-radius:4px;border:1px solid #e8e8e8;overflow:hidden}
.osc-feed-tabs{display:flex;border-bottom:1px solid #e8e8e8;background:#fafafa}
.osc-tab{padding:12px 20px;font-size:14px;color:#666;cursor:pointer;position:relative;font-weight:500}
.osc-tab.active{color:#3ca160;font-weight:600}
.osc-tab.active::after{content:'';position:absolute;bottom:0;left:20px;right:20px;height:2px;background:#3ca160;border-radius:1px}
.osc-feed-list{padding:0}
.osc-feed-item{padding:14px 16px;border-bottom:1px solid #f0f0f0;transition:background .15s}
.osc-feed-item:hover{background:#fafffe}
.osc-feed-item:last-child{border-bottom:none}
.osc-feed-title{font-size:15px;font-weight:600;margin-bottom:4px;line-height:1.5}
.osc-feed-title a{color:#333;text-decoration:none}
.osc-feed-title a:hover{color:#3ca160}
.osc-feed-excerpt{font-size:13px;color:#888;line-height:1.6;margin-bottom:6px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.osc-feed-meta{display:flex;align-items:center;gap:10px;font-size:12px;color:#aaa;flex-wrap:wrap}
.osc-feed-date{color:#bbb}
.osc-feed-read{color:#bbb}
.osc-feed-tag{color:#3ca160;background:#f0f9f3;padding:1px 8px;border-radius:3px;font-size:11px;text-decoration:none}
.osc-feed-tag:hover{background:#e0f5e8;text-decoration:none}
.osc-feed-more{padding:14px 16px;text-align:center}
.osc-feed-more a{color:#3ca160;font-size:13px}

/* --- Right Sidebar --- */
.osc-sidebar-right{display:flex;flex-direction:column;gap:16px}

/* --- Widgets --- */
.osc-widget{background:#fff;border-radius:4px;border:1px solid #e8e8e8;overflow:hidden}
.osc-widget-hd{font-size:14px;font-weight:600;color:#333;padding:12px 14px;border-bottom:1px solid #f0f0f0;background:#fafafa;position:relative}
.osc-widget-hd::before{content:'';position:absolute;left:0;top:8px;bottom:8px;width:3px;background:#3ca160;border-radius:0 2px 2px 0}

/* --- Hot Articles Ranking --- */
.osc-hot-list{counter-reset:hot-rank;padding:6px 0}
.osc-hot-list li{padding:7px 14px 7px 14px;display:flex;align-items:flex-start;gap:8px;counter-increment:hot-rank}
.osc-hot-list li::before{content:counter(hot-rank);display:inline-flex;align-items:center;justify-content:center;min-width:20px;height:20px;background:#f0f0f0;color:#999;font-size:11px;font-weight:700;border-radius:3px;flex-shrink:0;margin-top:2px}
.osc-hot-list li:nth-child(1)::before{background:#ff6b35;color:#fff}
.osc-hot-list li:nth-child(2)::before{background:#ff9500;color:#fff}
.osc-hot-list li:nth-child(3)::before{background:#ffc107;color:#fff}
.osc-hot-list li a{color:#555;font-size:13px;line-height:1.5;text-decoration:none;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.osc-hot-list li a:hover{color:#3ca160}

/* --- Widget Categories --- */
.osc-widget-cats li{border-bottom:1px solid #f5f5f5}
.osc-widget-cats li:last-child{border-bottom:none}
.osc-widget-cats a{display:block;padding:8px 14px;color:#555;font-size:13px;text-decoration:none}
.osc-widget-cats a:hover{color:#3ca160;background:#f5faf7}

/* --- Widget CTA --- */
.osc-widget-cta{background:linear-gradient(135deg,#3ca160,#2d8a4e);text-align:center;padding:20px 14px;border:none}
.osc-cta-text{color:#fff;font-size:14px;margin-bottom:10px;font-weight:500}
.osc-cta-btn{display:inline-block;background:#fff;color:#3ca160;padding:8px 24px;border-radius:4px;font-weight:600;font-size:13px;text-decoration:none;transition:transform .15s}
.osc-cta-btn:hover{transform:translateY(-1px);text-decoration:none;color:#2d7a48}

/* --- FAQ in sidebar --- */
.osc-faq-list{padding:8px 14px}
.osc-faq-item{margin-bottom:12px;padding-bottom:12px;border-bottom:1px solid #f5f5f5}
.osc-faq-item:last-child{margin-bottom:0;padding-bottom:0;border-bottom:none}
.osc-faq-q{font-size:13px;font-weight:600;color:#333;margin-bottom:4px}
.osc-faq-q::before{content:'Q';display:inline-block;background:#3ca160;color:#fff;width:18px;height:18px;font-size:11px;line-height:18px;text-align:center;border-radius:3px;margin-right:6px}
.osc-faq-a{font-size:12px;color:#888;line-height:1.6;padding-left:24px}

/* --- TOC --- */
.osc-toc li{border-bottom:1px solid #f8f8f8}
.osc-toc li:last-child{border-bottom:none}
.osc-toc a{display:block;padding:6px 14px;color:#555;font-size:13px;text-decoration:none;line-height:1.5}
.osc-toc a:hover{color:#3ca160;background:#f5faf7}
.osc-toc-h3 a{padding-left:28px;font-size:12px;color:#888}

/* --- Article List Page --- */
.osc-list-header{margin-bottom:16px}
.osc-list-header h1{font-size:22px;color:#333;margin-bottom:4px}
.osc-list-header p{font-size:13px;color:#999}
.osc-article-list{background:#fff;border-radius:4px;border:1px solid #e8e8e8;overflow:hidden}

/* --- Tag Grid --- */
.osc-tag-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.osc-tag-card{display:block;background:#fff;border:1px solid #e8e8e8;border-radius:4px;padding:20px;text-align:center;text-decoration:none;transition:border-color .2s,box-shadow .2s}
.osc-tag-card:hover{border-color:#3ca160;box-shadow:0 2px 8px rgba(60,161,96,.12);text-decoration:none}
.osc-tag-card h3{font-size:16px;color:#333;margin-bottom:6px}
.osc-tag-card p{font-size:12px;color:#3ca160}

/* --- Article Detail --- */
.osc-detail-grid{display:grid;grid-template-columns:1fr 280px;gap:16px;align-items:start}
.osc-article{background:#fff;border-radius:4px;border:1px solid #e8e8e8;padding:28px 24px;overflow:hidden}
.osc-article-title{font-size:24px;color:#333;margin-bottom:12px;line-height:1.4}
.osc-article-meta{display:flex;align-items:center;gap:8px;font-size:13px;color:#999;margin-bottom:20px;padding-bottom:16px;border-bottom:1px solid #f0f0f0;flex-wrap:wrap}
.osc-meta-author{color:#3ca160;font-weight:500}
.osc-meta-dot{color:#ddd}
.osc-meta-tag{background:#f0f9f3;color:#3ca160;padding:2px 8px;border-radius:3px;font-size:12px;text-decoration:none}
.osc-meta-tag:hover{background:#e0f5e8;text-decoration:none}

/* --- Article Body --- */
.osc-article-body{font-size:15px;line-height:1.8;color:#444}
.osc-article-body h2{font-size:20px;color:#333;margin:28px 0 12px;padding-bottom:8px;border-bottom:1px solid #f0f0f0;position:relative}
.osc-article-body h3{font-size:17px;color:#333;margin:22px 0 10px}
.osc-article-body h4{font-size:15px;color:#555;margin:18px 0 8px}
.osc-article-body p{margin-bottom:14px}
.osc-article-body ul,.osc-article-body ol{margin:10px 0 14px 24px}
.osc-article-body ul{list-style:disc}
.osc-article-body ol{list-style:decimal}
.osc-article-body li{margin-bottom:4px}
.osc-article-body blockquote{border-left:3px solid #3ca160;background:#f5faf7;padding:12px 16px;margin:14px 0;color:#555;font-size:14px;border-radius:0 4px 4px 0}
.osc-article-body code{background:#f5f5f5;padding:2px 6px;border-radius:3px;font-size:13px;font-family:Consolas,"Courier New",monospace;color:#e74c3c}
.osc-article-body pre{background:#2e2e2e;color:#f0f0f0;padding:16px;border-radius:4px;overflow-x:auto;margin:14px 0;font-size:13px;line-height:1.6}
.osc-article-body pre code{background:none;color:inherit;padding:0}
.osc-article-body table{width:100%;border-collapse:collapse;margin:14px 0}
.osc-article-body th,.osc-article-body td{border:1px solid #e8e8e8;padding:8px 12px;text-align:left;font-size:13px}
.osc-article-body th{background:#fafafa;font-weight:600;color:#333}
.osc-article-body a{color:#3ca160;text-decoration:underline}
.osc-article-body a:hover{color:#2d7a48}
.osc-article-body .heading-anchor{color:#ccc;text-decoration:none;margin-left:6px;font-size:0.85em;opacity:0;transition:opacity .2s}
.osc-article-body h2:hover .heading-anchor,.osc-article-body h3:hover .heading-anchor{opacity:1}
.osc-article-body strong{color:#333}

/* --- Article Actions --- */
.osc-article-actions{margin-top:28px;padding-top:20px;border-top:1px solid #f0f0f0;display:flex;align-items:center;gap:12px}
.osc-actions-label{color:#999;font-size:13px}
.osc-btn-primary{display:inline-block;background:#3ca160;color:#fff;padding:8px 20px;border-radius:4px;font-size:13px;font-weight:600;text-decoration:none;transition:background .2s}
.osc-btn-primary:hover{background:#2d8a4e;color:#fff;text-decoration:none}
.osc-btn-outline{display:inline-block;border:1px solid #3ca160;color:#3ca160;padding:7px 20px;border-radius:4px;font-size:13px;font-weight:600;text-decoration:none;transition:all .2s}
.osc-btn-outline:hover{background:#3ca160;color:#fff;text-decoration:none}

/* --- Pagination --- */
.osc-pagination{display:flex;justify-content:center;align-items:center;gap:4px;margin:20px 0;padding:16px 0}
.osc-pagination a,.osc-pagination span{display:inline-flex;align-items:center;justify-content:center;min-width:32px;height:32px;padding:0 8px;font-size:13px;border-radius:4px;text-decoration:none}
.osc-pagination a{color:#555;background:#fff;border:1px solid #e0e0e0}
.osc-pagination a:hover{border-color:#3ca160;color:#3ca160;text-decoration:none}
.osc-pagination span.active{background:#3ca160;color:#fff;border:1px solid #3ca160}
.osc-pagination span.disabled{color:#ccc;background:#f5f5f5;border:1px solid #e8e8e8}

/* --- Page Content --- */
.osc-page-content{background:#fff;border-radius:4px;border:1px solid #e8e8e8;padding:28px 24px}
.osc-page-body{font-size:15px;line-height:1.8;color:#444}
.osc-page-body h2{font-size:20px;color:#333;margin:24px 0 12px;padding-bottom:8px;border-bottom:1px solid #f0f0f0}
.osc-page-body h3{font-size:17px;color:#333;margin:20px 0 8px}
.osc-page-body p{margin-bottom:12px}
.osc-page-body ul,.osc-page-body ol{margin:8px 0 12px 24px}
.osc-page-body ul{list-style:disc}
.osc-page-body ol{list-style:decimal}
.osc-page-body li{margin-bottom:4px}
.osc-page-body a{color:#3ca160}

/* --- Download Cards --- */
.osc-dl-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-bottom:16px}
.osc-dl-card{background:#fff;border:1px solid #e8e8e8;border-radius:4px;padding:24px 20px;text-align:center;transition:border-color .2s,box-shadow .2s}
.osc-dl-card:hover{border-color:#3ca160;box-shadow:0 2px 12px rgba(60,161,96,.1)}
.osc-dl-card-icon{color:#3ca160;margin-bottom:12px}
.osc-dl-card h2{font-size:18px;color:#333;margin-bottom:8px}
.osc-dl-card p{font-size:13px;color:#888;line-height:1.6;margin-bottom:16px;min-height:42px}
.osc-dl-card-btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;background:#3ca160;color:#fff;padding:9px 22px;border-radius:4px;font-size:13px;font-weight:600;text-decoration:none;transition:background .2s;width:100%}
.osc-dl-card-btn:hover{background:#2d8a4e;color:#fff;text-decoration:none}
.osc-dl-card-btn-alt{background:#fff;color:#3ca160;border:1px solid #3ca160}
.osc-dl-card-btn-alt:hover{background:#f0f9f3;color:#2d8a4e;text-decoration:none}
@media(max-width:860px){.osc-dl-cards{grid-template-columns:1fr}}
@media(max-width:480px){.osc-dl-card{padding:16px 14px}}

/* --- Project / Download Page (OSChina style) --- */
.osc-proj-hero{display:flex;align-items:flex-start;gap:20px;background:#fff;border:1px solid #e8e8e8;border-radius:4px;padding:24px;margin-bottom:16px}
.osc-proj-icon{flex-shrink:0}
.osc-proj-icon svg{border-radius:12px}
.osc-proj-info{flex:1;min-width:0}
.osc-proj-name{font-size:24px;color:#333;margin-bottom:6px}
.osc-proj-desc{font-size:14px;color:#888;margin-bottom:10px;line-height:1.5}
.osc-proj-tags{display:flex;flex-wrap:wrap;gap:6px}
.osc-ptag{background:#f0f9f3;color:#3ca160;font-size:12px;padding:3px 10px;border-radius:3px;border:1px solid #d4edda}
.osc-proj-actions{flex-shrink:0;display:flex;flex-direction:column;gap:8px;align-items:stretch;min-width:160px}
.osc-proj-btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:10px 20px;border-radius:4px;font-size:14px;font-weight:600;text-decoration:none;transition:all .2s;white-space:nowrap;cursor:pointer}
.osc-proj-btn-primary{background:#3ca160;color:#fff;border:1px solid #3ca160}
.osc-proj-btn-primary:hover{background:#2d8a4e;color:#fff;text-decoration:none}
.osc-proj-btn-outline{background:#fff;color:#3ca160;border:1px solid #3ca160}
.osc-proj-btn-outline:hover{background:#f0f9f3;color:#2d8a4e;text-decoration:none}
.osc-proj-grid{display:grid;grid-template-columns:1fr 280px;gap:16px;align-items:start}
.osc-proj-main{background:#fff;border:1px solid #e8e8e8;border-radius:4px;overflow:hidden}
.osc-proj-tabs{display:flex;border-bottom:1px solid #e8e8e8;background:#fafafa}
.osc-proj-tab{padding:12px 20px;font-size:14px;color:#666;cursor:default;font-weight:500;position:relative}
.osc-proj-tab.active{color:#3ca160;font-weight:600}
.osc-proj-tab.active::after{content:'';position:absolute;bottom:0;left:20px;right:20px;height:2px;background:#3ca160;border-radius:1px}
.osc-proj-body{padding:24px}
.osc-proj-side{display:flex;flex-direction:column;gap:16px}
.osc-proj-meta-list{padding:10px 14px}
.osc-pm-row{display:flex;justify-content:space-between;align-items:center;padding:7px 0;border-bottom:1px solid #f5f5f5;font-size:13px}
.osc-pm-row:last-child{border-bottom:none}
.osc-pm-label{color:#999}
.osc-pm-val{color:#333;font-weight:500}
.osc-pm-free{color:#3ca160;font-weight:600}
.osc-proj-dl-list{padding:8px 0}
.osc-proj-dl-item{display:flex;align-items:center;gap:10px;padding:10px 14px;color:#555;font-size:13px;text-decoration:none;border-bottom:1px solid #f5f5f5;transition:background .15s}
.osc-proj-dl-item:last-child{border-bottom:none}
.osc-proj-dl-item:hover{background:#f5faf7;color:#3ca160;text-decoration:none}
.osc-proj-dl-item svg{flex-shrink:0;color:#999}
.osc-proj-dl-item:hover svg{color:#3ca160}

@media(max-width:860px){
  .osc-proj-hero{flex-direction:column;align-items:center;text-align:center}
  .osc-proj-actions{flex-direction:row;min-width:auto}
  .osc-proj-grid{grid-template-columns:1fr}
}
@media(max-width:480px){
  .osc-proj-hero{padding:16px}
  .osc-proj-name{font-size:20px}
  .osc-proj-actions{flex-direction:column}
}

/* --- 404 --- */
.osc-error-box{text-align:center;padding:80px 16px}
.osc-error-num{font-size:96px;font-weight:800;color:#e0e0e0;line-height:1}
.osc-error-box h1{font-size:22px;color:#333;margin:16px 0 8px}
.osc-error-box p{color:#888;font-size:14px;margin-bottom:20px}

/* --- Footer --- */
.osc-footer{background:#2e2e2e;color:#999;margin-top:24px}
.osc-footer-inner{max-width:1200px;margin:0 auto;padding:0 16px}
.osc-footer-main{padding:28px 0}
.osc-footer-main .osc-footer-inner{display:flex;flex-direction:column;align-items:center;gap:12px}
.osc-footer-brand{display:flex;align-items:center;gap:8px;color:#fff;font-weight:600;font-size:16px}
.osc-footer-brand img{width:28px;height:28px;border-radius:4px}
.osc-footer-desc{font-size:13px;color:#888;text-align:center;max-width:600px;line-height:1.6}
.osc-footer-links{display:flex;align-items:center;gap:8px;font-size:13px}
.osc-footer-links a{color:#aaa;text-decoration:none}
.osc-footer-links a:hover{color:#3ca160}
.osc-footer-links span{color:#555}
.osc-footer-lang{display:flex;gap:6px;flex-wrap:wrap;justify-content:center}
.osc-footer-lang a{color:#777;font-size:12px;padding:2px 8px;border-radius:3px;text-decoration:none;border:1px solid #444}
.osc-footer-lang a:hover,.osc-footer-lang a.active{color:#fff;border-color:#3ca160;background:#3ca160}
.osc-footer-risk{background:#262626;padding:12px 0}
.osc-footer-risk .osc-footer-inner{font-size:11px;color:#777;line-height:1.7;text-align:center}
.osc-footer-copy{background:#222;padding:10px 0}
.osc-footer-copy .osc-footer-inner{font-size:12px;color:#666;text-align:center}

/* ========================================
   Responsive Breakpoints
   ======================================== */

@media(max-width:1024px){
  .osc-home-grid{grid-template-columns:180px 1fr 240px;gap:12px}
  .osc-detail-grid{grid-template-columns:1fr 240px;gap:12px}
}

@media(max-width:860px){
  .osc-home-grid{grid-template-columns:1fr;gap:12px}
  .osc-sidebar-left{display:none}
  .osc-sidebar-right{order:2}
  .osc-feed{order:1}
  .osc-detail-grid{grid-template-columns:1fr}
  .osc-sidebar-right{order:2}
  .osc-tag-grid{grid-template-columns:repeat(2,1fr)}
  .osc-nav{display:none}
  .osc-search{display:none}
  .osc-lang{display:none}
  .osc-mob-toggle{display:block}
  .osc-header-inner{height:48px}
}

@media(max-width:480px){
  html{font-size:13px}
  .osc-container{padding:10px}
  .osc-article{padding:16px 14px}
  .osc-article-title{font-size:20px}
  .osc-tag-grid{grid-template-columns:1fr 1fr}
  .osc-feed-item{padding:12px 14px}
  .osc-article-actions{flex-wrap:wrap}
  .osc-error-num{font-size:64px}
  .osc-footer-main{padding:20px 0}
  .osc-footer-links{flex-wrap:wrap;justify-content:center}
}