*{margin:0;padding:0;box-sizing:border-box}
:root{
  --purple:#7B1FA2;
  --pink:#E91E63;
  --dark:#0D0D1A;
  --darker:#1A1A2E;
  --card:#1E1E35;
  --card-hover:#252545;
  --border:#2A2A4A;
  --text:#E8E8F0;
  --text-dim:#9898B8;
  --text-muted:#6868A0;
  --grad:linear-gradient(135deg,#7B1FA2 0%,#E91E63 100%);
  --grad-h:linear-gradient(135deg,#9C27B0 0%,#F06292 100%);
  --grad-soft:linear-gradient(135deg,rgba(123,31,162,.15) 0%,rgba(233,30,99,.1) 100%);
  --radius:12px;
  --radius-sm:8px;
  --shadow:0 4px 24px rgba(0,0,0,.4);
  --shadow-lg:0 8px 40px rgba(0,0,0,.5);
}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;background:var(--dark);color:var(--text);line-height:1.7;overflow-x:hidden}
a{color:var(--pink);text-decoration:none;transition:color .2s}
a:hover{color:#F48FB1}
img{max-width:100%;height:auto}

/* Nav */
.nav{position:fixed;top:0;left:0;right:0;z-index:100;background:rgba(13,13,26,.92);backdrop-filter:blur(16px);border-bottom:1px solid var(--border);height:60px}
.nav-inner{max-width:1200px;margin:0 auto;padding:0 32px;height:100%;display:flex;align-items:center;justify-content:space-between}
.nav-logo{display:flex;align-items:center;gap:10px;font-size:20px;font-weight:700}
.nav-logo .icon{width:36px;height:36px;border-radius:10px;background:var(--grad);display:flex;align-items:center;justify-content:center;font-size:18px;color:#fff}
.nav-logo span{background:var(--grad);-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.nav-links{display:flex;gap:28px;font-size:14px}
.nav-links a{color:var(--text-dim);transition:color .2s}
.nav-links a:hover{color:#fff}
.nav-cta{padding:8px 20px;border-radius:20px;background:var(--grad);color:#fff;font-size:13px;font-weight:600;border:none;cursor:pointer;transition:all .2s;text-decoration:none}
.nav-cta:hover{background:var(--grad-h);transform:translateY(-1px);color:#fff}
.nav-toggle{display:none;background:none;border:none;color:var(--text);font-size:24px;cursor:pointer}

/* Mobile Menu */
.mobile-menu{display:none}
.mobile-menu.active .mobile-menu-overlay{opacity:1;pointer-events:auto}
.mobile-menu.active .mobile-menu-panel{transform:translateX(0)}
.mobile-menu-overlay{position:fixed;inset:0;background:rgba(0,0,0,.6);z-index:200;opacity:0;pointer-events:none;transition:opacity .3s}
.mobile-menu-panel{position:fixed;top:0;right:0;bottom:0;width:260px;background:var(--darker);z-index:201;transform:translateX(100%);transition:transform .3s ease;padding:24px;display:flex;flex-direction:column;gap:8px}
.mobile-menu-panel a{color:var(--text-dim);padding:12px 0;font-size:15px;border-bottom:1px solid var(--border)}
.mobile-close{align-self:flex-end;background:none;border:none;color:var(--text);font-size:20px;cursor:pointer;padding:8px}

/* Hero */
.hero{margin-top:60px;padding:80px 32px 60px;text-align:center;position:relative;overflow:hidden}
.hero::before{content:'';position:absolute;top:-120px;left:50%;transform:translateX(-50%);width:800px;height:800px;border-radius:50%;background:radial-gradient(circle,rgba(123,31,162,.2) 0%,rgba(233,30,99,.08) 40%,transparent 70%);pointer-events:none}
.hero-badge{display:inline-flex;align-items:center;gap:6px;padding:6px 16px;border-radius:20px;font-size:12px;background:rgba(123,31,162,.15);border:1px solid rgba(123,31,162,.3);color:#CE93D8;margin-bottom:24px}
.hero h1{font-size:44px;font-weight:800;line-height:1.2;margin-bottom:16px;background:var(--grad);-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.hero p{font-size:17px;color:var(--text-dim);max-width:600px;margin:0 auto 32px}
.hero-search{max-width:520px;margin:0 auto;display:flex;background:var(--darker);border:1px solid var(--border);border-radius:28px;overflow:hidden}
.hero-search input{flex:1;padding:14px 20px;background:transparent;border:none;outline:none;color:#fff;font-size:15px}
.hero-search input::placeholder{color:var(--text-muted)}
.hero-search button{padding:14px 24px;background:var(--grad);border:none;color:#fff;font-size:14px;font-weight:600;cursor:pointer;transition:background .2s}
.hero-search button:hover{background:var(--grad-h)}
.hero-stats{display:flex;justify-content:center;gap:48px;margin-top:40px}
.hero-stats .stat{text-align:center}
.hero-stats .num{font-size:28px;font-weight:700;color:#fff}
.hero-stats .label{font-size:12px;color:var(--text-muted);margin-top:2px}

/* Section */
.section{padding:60px 32px;max-width:1200px;margin:0 auto}
.section-title{font-size:24px;font-weight:700;margin-bottom:8px;display:flex;align-items:center;gap:10px}
.section-title .dot{width:8px;height:8px;border-radius:50%;background:var(--pink)}
.section-sub{font-size:14px;color:var(--text-dim);margin-bottom:32px}

/* Cat Grid */
.cat-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:16px}
.cat-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:28px 20px;text-align:center;cursor:pointer;transition:all .25s;position:relative;overflow:hidden;text-decoration:none;color:inherit;display:block}
.cat-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:var(--grad);opacity:0;transition:opacity .25s}
.cat-card:hover{background:var(--card-hover);border-color:rgba(123,31,162,.4);transform:translateY(-4px);box-shadow:var(--shadow);color:inherit}
.cat-card:hover::before{opacity:1}
.cat-icon{font-size:32px;margin-bottom:12px}
.cat-card h3{font-size:15px;font-weight:600;margin-bottom:6px;color:#fff}
.cat-card p{font-size:12px;color:var(--text-muted)}

/* Problem Grid */
.problem-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.problem-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:24px;display:flex;gap:16px;align-items:flex-start;cursor:pointer;transition:all .25s;text-decoration:none;color:inherit}
.problem-card:hover{background:var(--card-hover);border-color:rgba(123,31,162,.4);transform:translateY(-2px);box-shadow:var(--shadow);color:inherit}
.problem-num{min-width:36px;height:36px;border-radius:10px;background:var(--grad-soft);display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:700;color:var(--pink);flex-shrink:0}
.problem-card h4{font-size:14px;font-weight:600;color:#fff;margin-bottom:4px}
.problem-card p{font-size:12px;color:var(--text-muted)}

/* VPN Banner */
.vpn-banner{margin:20px auto;padding:40px 48px;border-radius:var(--radius);background:var(--grad);position:relative;overflow:hidden;display:flex;align-items:center;justify-content:space-between;max-width:1136px}
.vpn-banner::before{content:'';position:absolute;top:-40px;right:-40px;width:200px;height:200px;border-radius:50%;background:rgba(255,255,255,.08)}
.vpn-banner::after{content:'';position:absolute;bottom:-60px;right:80px;width:150px;height:150px;border-radius:50%;background:rgba(255,255,255,.05)}
.vpn-text{position:relative;z-index:1}
.vpn-text h3{font-size:22px;font-weight:700;color:#fff;margin-bottom:6px}
.vpn-text p{font-size:14px;color:rgba(255,255,255,.8)}
.vpn-btn{position:relative;z-index:1;padding:14px 32px;border-radius:28px;background:#fff;color:var(--purple);font-size:15px;font-weight:700;border:none;cursor:pointer;transition:all .2s;white-space:nowrap;text-decoration:none;display:inline-block}
.vpn-btn:hover{transform:scale(1.05);box-shadow:0 4px 20px rgba(0,0,0,.3);color:var(--purple)}

/* Article Grid */
.article-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.article-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;cursor:pointer;transition:all .25s;text-decoration:none;color:inherit;display:block}
.article-card:hover{border-color:rgba(123,31,162,.4);transform:translateY(-3px);box-shadow:var(--shadow);color:inherit}
.article-thumb{width:100%;height:160px;background:var(--grad-soft);display:flex;align-items:center;justify-content:center;font-size:48px;position:relative;overflow:hidden}
.article-thumb img{width:100%;height:100%;object-fit:cover}
.article-thumb .tag{position:absolute;top:12px;left:12px;padding:4px 10px;border-radius:4px;background:rgba(0,0,0,.5);backdrop-filter:blur(4px);font-size:11px;color:#fff}
.article-body{padding:20px}
.article-body h4{font-size:15px;font-weight:600;color:#fff;margin-bottom:8px;line-height:1.4}
.article-body p{font-size:13px;color:var(--text-dim);margin-bottom:12px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.article-meta{display:flex;gap:12px;font-size:11px;color:var(--text-muted)}

/* Disclaimer */
.disclaimer{max-width:1200px;margin:0 auto;padding:24px 32px;background:rgba(233,30,99,.06);border:1px solid rgba(233,30,99,.15);border-radius:var(--radius-sm);font-size:12px;color:var(--text-dim);line-height:1.8}
.disclaimer strong{color:var(--pink)}

/* Footer */
.footer{margin-top:60px;padding:40px 32px 24px;background:var(--darker);border-top:1px solid var(--border)}
.footer-inner{max-width:1200px;margin:0 auto;display:flex;justify-content:space-between;gap:40px}
.footer-col h5{font-size:13px;font-weight:600;color:#fff;margin-bottom:12px}
.footer-col a{display:block;font-size:12px;color:var(--text-muted);padding:3px 0;transition:color .2s}
.footer-col a:hover{color:var(--pink)}
.footer-bottom{max-width:1200px;margin:24px auto 0;padding-top:20px;border-top:1px solid var(--border);text-align:center;font-size:11px;color:var(--text-muted)}

/* ====== Article Page ====== */
.breadcrumb{margin-top:72px;max-width:1200px;margin-left:auto;margin-right:auto;padding:0 32px;font-size:13px;color:var(--text-muted);display:flex;gap:6px;align-items:center;flex-wrap:wrap}
.breadcrumb a{color:var(--text-muted)}
.breadcrumb a:hover{color:var(--pink)}
.breadcrumb .sep{color:var(--text-muted)}

.article-header{max-width:1200px;margin:20px auto 0;padding:0 32px}
.article-tags{display:flex;gap:8px;margin-bottom:16px;flex-wrap:wrap}
.article-tags span{padding:4px 12px;border-radius:4px;font-size:11px;background:rgba(123,31,162,.15);color:#CE93D8;border:1px solid rgba(123,31,162,.2)}
.article-title{font-size:32px;font-weight:800;line-height:1.3;margin-bottom:12px;color:#fff}
.article-meta-row{display:flex;gap:16px;font-size:13px;color:var(--text-muted);align-items:center;flex-wrap:wrap}
.article-meta-row .dot{width:4px;height:4px;border-radius:50%;background:var(--text-muted)}

.compliance-notice{max-width:1200px;margin:20px auto 0;padding:0 32px}
.compliance-notice div,.compliance-footer div{padding:14px 20px;background:rgba(233,30,99,.06);border:1px solid rgba(233,30,99,.15);border-radius:var(--radius-sm);font-size:12px;color:var(--text-dim);line-height:1.8}

.cover-area{max-width:1200px;margin:24px auto;height:320px;background:var(--grad-soft);border-radius:var(--radius);display:flex;align-items:center;justify-content:center;font-size:72px;position:relative;overflow:hidden}
.cover-area img{width:100%;height:100%;object-fit:cover;border-radius:var(--radius)}
.cover-area::after{content:'';position:absolute;bottom:0;left:0;right:0;height:80px;background:linear-gradient(to top,var(--dark),transparent);pointer-events:none}

.layout{max-width:1200px;margin:32px auto 0;padding:0 32px;display:grid;grid-template-columns:1fr 320px;gap:32px}
.main{min-width:0}

.toc-box{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:20px 24px;margin-bottom:28px}
.toc-box h4{font-size:14px;font-weight:600;color:#fff;margin-bottom:12px;display:flex;align-items:center;gap:6px}
#TableOfContents ul{list-style:none;padding-left:0}
#TableOfContents li{padding:6px 0;font-size:13px;border-bottom:1px solid rgba(255,255,255,.04)}
#TableOfContents li:last-child{border-bottom:none}
#TableOfContents a{color:var(--text-dim);transition:color .2s}
#TableOfContents a:hover{color:var(--pink)}
#TableOfContents ul ul{padding-left:16px;margin-top:4px}

/* Article Body */
.article-body{font-size:15px;line-height:1.9;color:var(--text)}
.article-body h2{font-size:20px;font-weight:700;color:#fff;margin:36px 0 16px;padding-left:14px;border-left:3px solid var(--purple);line-height:1.4}
.article-body h3{font-size:17px;font-weight:600;color:#fff;margin:24px 0 12px}
.article-body p{margin-bottom:16px}
.article-body strong{color:#fff}
.article-body ul,.article-body ol{margin:12px 0 16px 20px}
.article-body li{margin-bottom:6px}
.article-body blockquote{margin:20px 0;padding:16px 20px;background:rgba(123,31,162,.08);border-left:3px solid var(--purple);border-radius:0 var(--radius-sm) var(--radius-sm) 0;color:var(--text-dim);font-size:14px}
.article-body code{padding:2px 6px;background:rgba(123,31,162,.15);border-radius:4px;font-size:13px;color:#CE93D8}
.article-body pre{margin:16px 0;padding:16px;background:var(--darker);border:1px solid var(--border);border-radius:var(--radius-sm);overflow-x:auto;font-size:13px;color:var(--text-dim)}
.article-body table{width:100%;border-collapse:collapse;margin:16px 0;font-size:14px}
.article-body th{background:var(--card);padding:10px 14px;text-align:left;font-weight:600;color:#fff;border:1px solid var(--border)}
.article-body td{padding:10px 14px;border:1px solid var(--border);color:var(--text-dim)}
.article-body img{width:100%;border-radius:var(--radius);margin:16px 0;display:block}

/* In-Article CTA */
.in-article-cta{margin:28px 0;padding:24px 28px;background:var(--grad);border-radius:var(--radius);display:flex;align-items:center;gap:20px;position:relative;overflow:hidden}
.in-article-cta::before{content:'';position:absolute;top:-30px;right:-30px;width:120px;height:120px;border-radius:50%;background:rgba(255,255,255,.08)}
.in-article-cta .cta-icon{font-size:36px;position:relative;z-index:1}
.in-article-cta .cta-text{position:relative;z-index:1;flex:1}
.in-article-cta h4{font-size:16px;font-weight:700;color:#fff;margin-bottom:4px}
.in-article-cta p{font-size:13px;color:rgba(255,255,255,.8)}
.in-article-cta .cta-btn{position:relative;z-index:1;padding:10px 24px;border-radius:20px;background:#fff;color:var(--purple);font-size:13px;font-weight:700;border:none;cursor:pointer;white-space:nowrap;transition:transform .2s;text-decoration:none;display:inline-block}
.in-article-cta .cta-btn:hover{transform:scale(1.05);color:var(--purple)}

/* Sidebar */
.sidebar{position:sticky;top:80px;align-self:start}
.tool-card{background:var(--card);border:1px solid rgba(123,31,162,.3);border-radius:var(--radius);padding:24px;margin-bottom:20px;position:relative;overflow:hidden}
.tool-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:var(--grad)}
.tool-card h4{font-size:14px;font-weight:600;color:#fff;margin-bottom:8px;display:flex;align-items:center;gap:6px}
.tool-card p{font-size:12px;color:var(--text-dim);margin-bottom:14px;line-height:1.6}
.tool-btn{display:block;width:100%;padding:10px;border-radius:var(--radius-sm);background:var(--grad);color:#fff;font-size:13px;font-weight:600;text-align:center;border:none;cursor:pointer;transition:background .2s;text-decoration:none}
.tool-btn:hover{background:var(--grad-h);color:#fff}

.related-box{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:20px;margin-bottom:20px}
.related-box h4{font-size:14px;font-weight:600;color:#fff;margin-bottom:14px}
.related-item{display:flex;gap:12px;padding:10px 0;border-bottom:1px solid rgba(255,255,255,.04);font-size:13px;color:var(--text-dim);align-items:flex-start}
.related-item:last-child{border-bottom:none}
.ri-num{min-width:22px;height:22px;border-radius:6px;background:var(--grad-soft);display:inline-flex;align-items:center;justify-content:center;font-size:11px;font-weight:600;color:var(--pink);flex-shrink:0}
.related-item a{color:var(--text-dim);line-height:1.4;transition:color .2s}
.related-item a:hover{color:var(--pink)}

.compliance-footer{max-width:1200px;margin:32px auto 0;padding:0 32px}

/* Recommend */
.recommend{max-width:1200px;margin:48px auto 0;padding:0 32px}
.recommend-title{font-size:20px;font-weight:700;margin-bottom:20px;display:flex;align-items:center;gap:10px}
.recommend-title .dot{width:8px;height:8px;border-radius:50%;background:var(--pink)}
.recommend-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.recommend-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:20px;transition:all .25s;cursor:pointer;text-decoration:none;color:inherit;display:block}
.recommend-card:hover{border-color:rgba(123,31,162,.4);transform:translateY(-2px);box-shadow:var(--shadow);color:inherit}
.rc-tag{display:inline-block;padding:3px 8px;border-radius:4px;font-size:10px;background:rgba(123,31,162,.15);color:#CE93D8;margin-bottom:10px}
.recommend-card h5{font-size:14px;font-weight:600;color:#fff;margin-bottom:6px;line-height:1.4}
.recommend-card p{font-size:12px;color:var(--text-muted)}

/* Responsive */
@media(max-width:900px){
  .cat-grid{grid-template-columns:repeat(3,1fr)}
  .problem-grid{grid-template-columns:repeat(2,1fr)}
  .article-grid{grid-template-columns:repeat(2,1fr)}
  .hero h1{font-size:32px}
  .vpn-banner{flex-direction:column;text-align:center;gap:20px}
  .layout{grid-template-columns:1fr}
  .sidebar{position:static;order:-1;display:grid;grid-template-columns:1fr 1fr;gap:16px}
  .recommend-grid{grid-template-columns:repeat(2,1fr)}
  .article-title{font-size:24px}
  .cover-area{height:200px}
}
@media(max-width:600px){
  .cat-grid{grid-template-columns:repeat(2,1fr)}
  .problem-grid{grid-template-columns:1fr}
  .article-grid{grid-template-columns:1fr}
  .nav-links{display:none}
  .nav-toggle{display:block}
  .mobile-menu{display:block}
  .hero-stats{gap:24px}
  .hero-stats .num{font-size:22px}
  .footer-inner{flex-direction:column;gap:24px}
  .sidebar{grid-template-columns:1fr}
  .recommend-grid{grid-template-columns:1fr}
  .in-article-cta{flex-direction:column;text-align:center}
}