:root{
  --purple:#5865F2;--purple-dark:#4752C4;--purple-light:#7983F5;
  --green:#57F287;--red:#ED4245;--yellow:#FEE75C;
  --bg:#F2F3F5;--white:#FFFFFF;--text:#2E3338;--text2:#5C6370;--text3:#96989D;
  --border:#E3E5E8;--shadow:0 2px 12px rgba(0,0,0,0.08);
}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:'Noto Sans SC',system-ui,-apple-system,sans-serif;background:var(--bg);color:var(--text);line-height:1.6}
a{text-decoration:none;color:var(--purple)}
img{max-width:100%;height:auto}

/* ===== NAV ===== */
.nav{background:var(--purple);color:#fff;height:60px;display:flex;align-items:center;justify-content:center;position:sticky;top:0;z-index:100;box-shadow:0 2px 12px rgba(88,101,242,0.3)}
.nav-inner{max-width:1200px;width:100%;padding:0 32px;display:flex;align-items:center;justify-content:space-between}
.nav-logo{font-size:22px;font-weight:900;display:flex;align-items:center;gap:10px;letter-spacing:-0.5px;color:#fff}
.nav-logo svg{width:30px;height:30px}
.nav-links{display:flex;gap:4px}
.nav-links a{padding:8px 18px;border-radius:8px;font-size:14px;font-weight:500;transition:background .2s;color:#fff}
.nav-links a:hover,.nav-links a.active{background:rgba(255,255,255,0.18)}
.nav-toggle{display:none;cursor:pointer;font-size:24px;color:#fff}

/* ===== HERO ===== */
.hero{background:linear-gradient(135deg,#5865F2 0%,#6B73F7 30%,#8B5CF6 70%,#9333EA 100%);color:#fff;padding:80px 32px 72px;text-align:center;position:relative;overflow:hidden}
.hero::before{content:'';position:absolute;top:-120px;right:-80px;width:400px;height:400px;background:rgba(255,255,255,0.04);border-radius:50%}
.hero::after{content:'';position:absolute;bottom:-100px;left:-60px;width:350px;height:350px;background:rgba(255,255,255,0.03);border-radius:50%}
.hero h1{font-size:42px;font-weight:900;margin-bottom:16px;letter-spacing:-1px;position:relative}
.hero p{font-size:17px;opacity:.9;max-width:660px;margin:0 auto 36px;line-height:1.7;position:relative}
.hero-btns{display:flex;gap:16px;justify-content:center;flex-wrap:wrap;position:relative}
.hero-btn{display:inline-flex;align-items:center;gap:10px;padding:16px 36px;border-radius:12px;font-size:17px;font-weight:700;transition:transform .2s,box-shadow .2s}
.hero-btn:hover{transform:translateY(-2px)}
.hero-btn-primary{background:#fff;color:var(--purple);box-shadow:0 4px 20px rgba(0,0,0,0.15)}
.hero-btn-primary:hover{box-shadow:0 8px 30px rgba(0,0,0,0.2)}
.hero-btn-secondary{background:rgba(255,255,255,0.12);color:#fff;border:1.5px solid rgba(255,255,255,0.35)}
.hero-btn-secondary:hover{background:rgba(255,255,255,0.2)}

/* ===== STATS BAR ===== */
.stats-bar{background:var(--white);border-bottom:1px solid var(--border);padding:0 32px}
.stats-inner{max-width:1200px;margin:0 auto;display:grid;grid-template-columns:repeat(4,1fr);text-align:center}
.stat-item{padding:24px 16px;border-right:1px solid var(--border)}
.stat-item:last-child{border:0}
.stat-num{font-size:30px;font-weight:900;color:var(--purple)}
.stat-label{font-size:13px;color:var(--text3);margin-top:4px}

/* ===== SECTION COMMON ===== */
.section{max-width:1200px;margin:0 auto;padding:48px 32px}
.sec-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:28px}
.sec-header h2{font-size:24px;font-weight:900;display:flex;align-items:center;gap:10px}
.sec-header h2 .icon{width:6px;height:28px;background:var(--purple);border-radius:3px}
.sec-header a{font-size:14px;color:var(--purple);font-weight:600}

/* ===== DOWNLOAD GRID ===== */
.dl-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.dl-card{background:var(--white);border:2px solid var(--border);border-radius:16px;padding:32px 20px;text-align:center;transition:all .25s;position:relative;overflow:hidden}
.dl-card::before{content:'';position:absolute;top:0;left:0;right:0;height:4px;background:var(--purple);transform:scaleX(0);transition:transform .25s}
.dl-card:hover{border-color:var(--purple);transform:translateY(-4px);box-shadow:0 12px 32px rgba(88,101,242,0.15)}
.dl-card:hover::before{transform:scaleX(1)}
.dl-card .dl-icon{font-size:44px;margin-bottom:12px;display:block}
.dl-card .dl-name{font-size:18px;font-weight:700;margin-bottom:4px}
.dl-card .dl-info{font-size:13px;color:var(--text3);margin-bottom:16px}
.dl-card .dl-btn{display:block;padding:12px 0;background:var(--purple);color:#fff;border-radius:10px;font-size:15px;font-weight:700;transition:background .2s}
.dl-card .dl-btn:hover{background:var(--purple-dark);color:#fff}
.dl-card .dl-badge{position:absolute;top:14px;right:14px;background:#FEE75C;color:#2E3338;font-size:11px;font-weight:700;padding:3px 10px;border-radius:6px}

/* ===== FEATURE STRIP ===== */
.feature-strip{background:var(--white);border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.feature-inner{max-width:1200px;margin:0 auto;display:grid;grid-template-columns:repeat(4,1fr);padding:0 32px}
.feature-item{padding:32px 20px;text-align:center;border-right:1px solid var(--border)}
.feature-item:last-child{border:0}
.feature-item .f-icon{font-size:32px;margin-bottom:10px}
.feature-item h4{font-size:15px;font-weight:700;margin-bottom:6px}
.feature-item p{font-size:12px;color:var(--text3);line-height:1.5}

/* ===== ARTICLE CARDS ===== */
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.card{background:var(--white);border-radius:14px;overflow:hidden;box-shadow:var(--shadow);transition:transform .25s,box-shadow .25s;border:1px solid var(--border)}
.card:hover{transform:translateY(-4px);box-shadow:0 8px 24px rgba(0,0,0,0.12)}
.card-thumb{height:160px;position:relative;display:flex;align-items:center;justify-content:center}
.card-thumb.purple{background:linear-gradient(135deg,#5865F2,#7983F5)}
.card-thumb.green{background:linear-gradient(135deg,#43B581,#57F287)}
.card-thumb.blue{background:linear-gradient(135deg,#5BC0DE,#3498DB)}
.card-thumb.red{background:linear-gradient(135deg,#ED4245,#D83C3E)}
.card-thumb.yellow{background:linear-gradient(135deg,#F0C60A,#FEE75C)}
.card-thumb.teal{background:linear-gradient(135deg,#1ABC9C,#16A085)}
.card-thumb img{width:100%;height:100%;object-fit:cover}
.card-thumb .emoji{font-size:48px}
.card-thumb .badge{position:absolute;top:10px;right:10px;background:rgba(0,0,0,0.45);color:#fff;font-size:11px;font-weight:600;padding:3px 10px;border-radius:6px;backdrop-filter:blur(4px)}
.card-body{padding:20px}
.card-body h3{font-size:16px;font-weight:700;margin-bottom:8px;line-height:1.5}
.card-body h3 a{color:var(--text)}
.card-body h3 a:hover{color:var(--purple)}
.card-body p{font-size:13px;color:var(--text2);line-height:1.6;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-foot{display:flex;gap:12px;margin-top:12px;font-size:12px;color:var(--text3)}

/* ===== CTA BANNER ===== */
.cta-banner{background:linear-gradient(135deg,#5865F2,#7C3AED);border-radius:20px;padding:48px;text-align:center;color:#fff;position:relative;overflow:hidden}
.cta-banner::before{content:'';position:absolute;top:-50px;right:-50px;width:200px;height:200px;background:rgba(255,255,255,0.06);border-radius:50%}
.cta-banner h3{font-size:28px;font-weight:900;margin-bottom:10px;position:relative}
.cta-banner p{font-size:15px;opacity:.85;margin-bottom:24px;position:relative}
.cta-banner .cta-btn{display:inline-flex;align-items:center;gap:8px;padding:16px 48px;background:#fff;color:var(--purple);border-radius:12px;font-size:17px;font-weight:800;transition:transform .2s,box-shadow .2s;position:relative}
.cta-banner .cta-btn:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(0,0,0,0.2);color:var(--purple-dark)}

/* ===== FOOTER ===== */
.footer{background:#1E1F22;color:#fff;padding:56px 32px 0;margin-top:0}
.footer-inner{max-width:1200px;margin:0 auto;display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px}
.footer h4{font-size:14px;font-weight:600;margin-bottom:16px;color:rgba(255,255,255,.65);text-transform:uppercase;letter-spacing:1px}
.footer a{display:block;font-size:13px;color:rgba(255,255,255,.45);padding:4px 0;transition:color .2s}
.footer a:hover{color:#fff}
.footer-brand{font-size:13px;color:rgba(255,255,255,.35);line-height:1.7;max-width:300px;margin-top:8px}
.footer-copy{max-width:1200px;margin:36px auto 0;padding:20px 0;border-top:1px solid rgba(255,255,255,.08);font-size:12px;color:rgba(255,255,255,.25);text-align:center}

/* ===== ARTICLE PAGE ===== */
.breadcrumb{max-width:1200px;margin:0 auto;padding:16px 32px;font-size:13px;color:var(--text3)}
.breadcrumb a{color:var(--text3)}.breadcrumb a:hover{color:var(--purple)}.breadcrumb .sep{margin:0 6px}
.art-header{max-width:1200px;margin:0 auto;padding:0 32px 24px}
.art-tag{display:inline-block;background:#EBE7FF;color:var(--purple);padding:3px 10px;border-radius:4px;font-size:12px;font-weight:500;margin-bottom:12px}
.art-header h1{font-size:28px;font-weight:700;line-height:1.4;margin-bottom:12px}
.art-meta{display:flex;gap:16px;font-size:13px;color:var(--text3)}
.art-cover{max-width:1200px;margin:0 auto;padding:0 32px 24px}
.art-cover img{width:100%;border-radius:10px;max-height:360px;object-fit:cover}
.art-layout{max-width:1200px;margin:0 auto;padding:0 32px;display:grid;grid-template-columns:1fr 320px;gap:32px}

/* Download banner */
.dl-banner{background:linear-gradient(135deg,#5865F2,#7983F5);color:#fff;border-radius:10px;padding:20px 24px;display:flex;align-items:center;justify-content:space-between;margin-bottom:24px}
.dl-banner h3{font-size:16px;font-weight:600;margin-bottom:4px}
.dl-banner p{font-size:13px;opacity:.85}
.dl-banner-btn{display:inline-block;padding:10px 24px;background:#fff;color:var(--purple);border-radius:6px;font-size:14px;font-weight:700;white-space:nowrap}
.dl-banner-btn:hover{color:var(--purple-dark)}

/* Article body */
.art-body{min-width:0}
.art-body h2{font-size:20px;font-weight:700;margin:32px 0 14px;padding-left:12px;border-left:4px solid var(--purple)}
.art-body h3{font-size:17px;font-weight:600;margin:24px 0 10px}
.art-body p{margin-bottom:14px;line-height:1.8}
.art-body ul,.art-body ol{margin:0 0 14px 20px}
.art-body li{margin-bottom:6px;line-height:1.7}
.art-body img{max-width:100%;border-radius:8px;margin:16px 0;display:block}
.art-body blockquote{border-left:4px solid var(--purple);background:#EBE7FF;padding:14px 18px;border-radius:0 8px 8px 0;margin:16px 0;font-size:14px}
.art-body table{width:100%;border-collapse:collapse;margin:16px 0;font-size:14px}
.art-body th{background:var(--purple);color:#fff;padding:10px 14px;text-align:left;font-weight:600}
.art-body td{padding:10px 14px;border-bottom:1px solid var(--border)}

/* Inline download CTA */
.dl-inline{background:linear-gradient(135deg,#EBE7FF,#F0EDFF);border:2px solid var(--purple-light);border-radius:10px;padding:18px 22px;margin:24px 0;text-align:center}
.dl-inline p{font-size:15px;font-weight:500;margin-bottom:10px}
.dl-inline-btn{display:inline-block;padding:10px 28px;background:var(--purple);color:#fff;border-radius:6px;font-size:15px;font-weight:700}
.dl-inline-btn:hover{background:var(--purple-dark);color:#fff}

/* FAQ */
.faq-section{margin-top:36px}
.faq-section h2{border-left-color:var(--green)}
.faq-item{border:1px solid var(--border);border-radius:8px;margin-bottom:8px;overflow:hidden;background:var(--white)}
.faq-q{padding:14px 18px;font-weight:600;font-size:15px;cursor:pointer;display:flex;justify-content:space-between;align-items:center}
.faq-q:hover{background:#F8F8FA}
.faq-q::after{content:"+";font-size:18px;color:var(--purple);font-weight:700}
.faq-a{padding:0 18px 14px;font-size:14px;color:var(--text2);line-height:1.7}

/* ===== SIDEBAR ===== */
.sidebar{display:flex;flex-direction:column;gap:20px}
.side-card{background:var(--white);border-radius:10px;padding:20px;box-shadow:var(--shadow);border:1px solid var(--border)}
.side-card h4{font-size:15px;font-weight:700;margin-bottom:12px}
.side-dl{text-align:center;padding:8px 0}
.side-dl .dl-big-btn{display:block;padding:14px;background:var(--purple);color:#fff;border-radius:8px;font-size:16px;font-weight:700;margin-bottom:8px}
.side-dl .dl-big-btn:hover{background:var(--purple-dark);color:#fff}
.side-dl .dl-note{font-size:12px;color:var(--text3)}
.side-search{padding:14px 16px}
.search-box{display:flex;align-items:center;gap:8px;background:var(--bg);border:1.5px solid var(--border);border-radius:10px;padding:10px 14px;transition:border-color .2s,box-shadow .2s}
.search-box:focus-within{border-color:var(--purple);box-shadow:0 0 0 3px rgba(88,101,242,0.12)}
.search-box svg{color:var(--text3);flex-shrink:0}
.search-box input{border:none;outline:none;background:transparent;font-size:14px;color:var(--text);width:100%;font-family:inherit}
.search-box input::placeholder{color:var(--text3)}
.tag-cloud{padding:16px}
.tag-cloud h4{font-size:14px;font-weight:700;margin-bottom:12px;display:flex;align-items:center;gap:6px}
.tag-cloud-list{display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.tag-cloud-list a{display:inline-block;padding:4px 12px;border-radius:20px;font-weight:500;transition:all .2s;white-space:nowrap}
.tag-cloud-list a:hover{transform:translateY(-1px);box-shadow:0 2px 8px rgba(88,101,242,0.2)}
.tag-cloud-list .t-xl{font-size:15px;background:#5865F2;color:#fff;padding:6px 16px}
.tag-cloud-list .t-lg{font-size:14px;background:rgba(88,101,242,0.15);color:#4752C4;padding:5px 14px}
.tag-cloud-list .t-md{font-size:13px;background:rgba(88,101,242,0.08);color:#5865F2;padding:4px 12px}
.tag-cloud-list .t-sm{font-size:12px;background:var(--bg);color:var(--text2);padding:3px 10px}
.toc{margin-bottom:6px}
.toc a{display:block;padding:6px 0 6px 14px;font-size:13px;color:var(--text2);border-left:2px solid var(--border);transition:all .2s}
.toc a:hover,.toc a.active{color:var(--purple);border-left-color:var(--purple)}
.side-list{list-style:none}
.side-list li{padding:8px 0;border-bottom:1px solid var(--border);font-size:14px}
.side-list li:last-child{border:0}
.side-list li a{display:flex;align-items:center;gap:8px;color:var(--text)}
.side-list li a:hover{color:var(--purple)}
.side-list .r-tag{font-size:11px;background:#EBE7FF;color:var(--purple);padding:2px 6px;border-radius:3px;font-weight:500}

/* Recommended */
.rec-section{max-width:1200px;margin:32px auto 0;padding:0 32px 60px}
.rec-section h3{font-size:18px;font-weight:700;margin-bottom:16px}
.rec-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.rec-card{background:var(--white);border:1px solid var(--border);border-radius:8px;padding:16px;transition:border-color .2s}
.rec-card:hover{border-color:var(--purple)}
.rec-card h4{font-size:14px;font-weight:600;margin-bottom:6px;line-height:1.4}
.rec-card h4 a{color:var(--text)}
.rec-card h4 a:hover{color:var(--purple)}
.rec-card p{font-size:12px;color:var(--text3)}

/* ===== LIST PAGE ===== */
.list-hero{background:linear-gradient(135deg,#5865F2,#7983F5);color:#fff;padding:40px 32px;text-align:center}
.list-hero h1{font-size:30px;font-weight:900}
.list-hero p{font-size:14px;opacity:.85;margin-top:8px}
.list-section{max-width:1200px;margin:0 auto;padding:40px 32px}
.list-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}

/* ===== MOBILE NAV ===== */
.nav-overlay{position:fixed;inset:0;background:rgba(0,0,0,0.5);z-index:99;opacity:0;pointer-events:none;transition:opacity .3s}
.nav-overlay.open{opacity:1;pointer-events:auto}
.mobile-menu{position:fixed;top:0;right:0;bottom:0;width:260px;background:var(--purple);color:#fff;z-index:100;transform:translateX(100%);transition:transform .3s ease;padding:24px;display:flex;flex-direction:column;gap:8px}
.mobile-menu.open{transform:translateX(0)}
.mobile-menu a{display:block;padding:12px 16px;border-radius:8px;font-size:15px;font-weight:500;color:#fff}
.mobile-menu a:hover,.mobile-menu a.active{background:rgba(255,255,255,0.15)}
.mobile-close{align-self:flex-end;font-size:24px;cursor:pointer;padding:4px 8px}

/* ===== RESPONSIVE ===== */
@media(max-width:900px){
  .dl-grid{grid-template-columns:repeat(2,1fr)}
  .card-grid,.list-grid,.rec-grid{grid-template-columns:repeat(2,1fr)}
  .footer-inner{grid-template-columns:1fr 1fr}
  .stats-inner{grid-template-columns:repeat(2,1fr)}
  .feature-inner{grid-template-columns:repeat(2,1fr)}
  .art-layout{grid-template-columns:1fr}
  .hero h1{font-size:32px}
}
@media(max-width:600px){
  .dl-grid,.card-grid,.list-grid,.rec-grid{grid-template-columns:1fr}
  .footer-inner{grid-template-columns:1fr}
  .stats-inner{grid-template-columns:1fr}
  .nav-links{display:none}
  .nav-toggle{display:block}
  .hero h1{font-size:26px}
  .hero{padding:56px 20px 48px}
  .cta-banner{margin:0 16px;padding:32px 20px}
  .dl-banner{flex-direction:column;gap:12px;text-align:center}
}