*{margin:0;padding:0;box-sizing:border-box}
:root{--bg:#ffffff;--bg2:#f8fafc;--bg3:#f1f5f9;--bg4:#e2e8f0;--txt:#0f172a;--txt2:#475569;--txt3:#94a3b8;--indigo:#4f46e5;--indigo2:#6366f1;--indigo-g:rgba(79,70,229,0.08);--orange:#f97316;--orange-g:rgba(249,115,22,0.08);--green:#16a34a;--green-g:rgba(22,163,74,0.08);--blue:#2563eb;--blue-g:rgba(37,99,235,0.08);--amber:#d97706;--amber-g:rgba(217,119,6,0.08);--border:#e2e8f0;--border2:#cbd5e1;--shadow:0 1px 3px rgba(0,0,0,0.06),0 1px 2px rgba(0,0,0,0.04);--shadow-lg:0 10px 40px rgba(0,0,0,0.08);--r:12px;--r2:8px;--grad:linear-gradient(135deg,#4f46e5,#7c3aed);--maxw:1200px;--font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif}
html{scroll-behavior:smooth}body{font-family:var(--font);background:var(--bg);color:var(--txt);line-height:1.7;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}

/* NAV */
.nav{position:fixed;top:0;left:0;right:0;z-index:100;background:rgba(255,255,255,0.92);backdrop-filter:blur(20px);border-bottom:1px solid var(--border);height:60px}
.nav-inner{max-width:var(--maxw);margin:0 auto;padding:0 24px;height:100%;display:flex;align-items:center;justify-content:space-between}
.nav-logo{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:800}
.nav-logo-icon{width:34px;height:34px;background:var(--grad);border-radius:10px;display:flex;align-items:center;justify-content:center}
.nav-logo-icon span{color:#fff;font-size:15px;font-weight:800}
.nav-logo b{color:var(--indigo)}
.nav-links{display:flex;gap:2px;list-style:none}
.nav-links a{padding:8px 14px;border-radius:8px;font-size:13px;font-weight:500;color:var(--txt2);transition:all .15s}
.nav-links a:hover{color:var(--indigo);background:var(--indigo-g)}
.nav-dl{background:var(--indigo);color:#fff;padding:8px 18px;border-radius:8px;font-size:13px;font-weight:600;display:flex;align-items:center;gap:6px;white-space:nowrap}

/* HERO */
.hero{padding:108px 24px 60px;max-width:var(--maxw);margin:0 auto;display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center}
.hero-badge{display:inline-flex;gap:6px;background:var(--orange-g);border:1px solid rgba(249,115,22,0.15);padding:5px 14px;border-radius:20px;font-size:12px;color:var(--orange);font-weight:600;margin-bottom:20px}
.hero h1{font-size:40px;font-weight:800;line-height:1.18;margin-bottom:16px;letter-spacing:-.02em}
.hero h1 em{font-style:normal;color:var(--indigo)}
.hero-desc{font-size:15px;color:var(--txt2);margin-bottom:28px;line-height:1.8}
.hero-btns{display:flex;gap:10px;flex-wrap:wrap}
.btn-primary{background:var(--indigo);color:#fff;padding:12px 24px;border-radius:10px;font-size:14px;font-weight:600;display:inline-flex;align-items:center;gap:7px;transition:all .2s;box-shadow:0 4px 12px rgba(79,70,229,0.2)}
.btn-primary:hover{background:var(--indigo2);transform:translateY(-1px);box-shadow:0 6px 20px rgba(79,70,229,0.3)}
.btn-outline{background:#fff;color:var(--txt);padding:12px 24px;border-radius:10px;font-size:14px;font-weight:500;border:1px solid var(--border2);transition:all .15s}
.btn-outline:hover{border-color:var(--indigo);color:var(--indigo)}
.hero-card{background:#fff;border:1px solid var(--border);border-radius:16px;padding:28px;box-shadow:var(--shadow-lg)}
.hero-card-head{display:flex;align-items:center;gap:14px;margin-bottom:16px}
.hero-card-icon{width:48px;height:48px;background:var(--indigo-g);border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:22px}
.hero-card-info h3{font-size:16px;font-weight:700}.hero-card-info span{font-size:12px;color:var(--txt3)}
.hero-card-rating{display:flex;align-items:center;gap:6px;margin-bottom:6px}.hero-card-stars{color:var(--amber);font-size:15px;letter-spacing:1px}.hero-card-num{font-size:13px;font-weight:700;color:var(--indigo)}
.hero-card-score{font-size:13px;color:var(--txt2);margin-bottom:16px}
.hero-card-features{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.hero-card-feat{padding:8px 12px;background:var(--bg2);border-radius:8px;font-size:12px;color:var(--txt2);display:flex;align-items:center;gap:6px}
.hero-card-feat .check{color:var(--green);font-size:14px;font-weight:700}

/* CATEGORY CARDS */
.cat-section{max-width:var(--maxw);margin:0 auto;padding:8px 24px 48px}
.cat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.cat-card{background:#fff;border:1px solid var(--border);border-radius:14px;padding:24px;text-align:center;transition:all .2s;cursor:pointer;position:relative;overflow:hidden}
.cat-card:hover{border-color:var(--indigo);transform:translateY(-3px);box-shadow:var(--shadow-lg)}
.cat-card-icon{width:48px;height:48px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:22px;margin:0 auto 10px}
.cat-card-icon.editor{background:var(--indigo-g)}.cat-card-icon.converter{background:var(--blue-g)}.cat-card-icon.tools{background:var(--green-g)}.cat-card-icon.repair{background:var(--amber-g)}
.cat-card h3{font-size:15px;font-weight:700;margin-bottom:4px}.cat-card p{font-size:12px;color:var(--txt3)}
.cat-card-num{position:absolute;top:12px;right:14px;font-size:11px;font-weight:700;color:var(--indigo);background:var(--indigo-g);padding:2px 8px;border-radius:6px}

/* DOWNLOAD BANNER */
.dl-banner{background:#fff;border:1px solid var(--border);border-radius:14px;padding:24px;display:flex;align-items:center;justify-content:space-between;gap:20px;box-shadow:var(--shadow)}
.dl-banner-left{display:flex;align-items:center;gap:16px;flex:1}
.dl-banner-left h3{font-size:15px;font-weight:700;color:var(--txt);margin-bottom:2px}
.dl-banner-left p{font-size:12px;color:var(--txt2);margin:0}
.dl-banner-right{flex-shrink:0;text-align:center}

/* COMPARISON TABLE */
.cmp-section{max-width:var(--maxw);margin:0 auto;padding:0 24px 48px}
.cmp-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px;flex-wrap:wrap;gap:8px}
.cmp-title{font-size:20px;font-weight:800}.cmp-title span{color:var(--indigo)}
.cmp-sub{font-size:13px;color:var(--txt3)}
.cmp-table{width:100%;border-collapse:separate;border-spacing:0;background:#fff;border-radius:14px;overflow:hidden;border:1px solid var(--border);box-shadow:var(--shadow)}
.cmp-table th{background:var(--bg2);padding:14px 16px;font-size:12px;font-weight:600;text-transform:uppercase;letter-spacing:.05em;color:var(--txt3);text-align:left;border-bottom:1px solid var(--border)}
.cmp-table td{padding:14px 16px;font-size:13px;border-bottom:1px solid var(--border);color:var(--txt2)}
.cmp-table tr:last-child td{border-bottom:none}
.cmp-table tr:hover td{background:var(--bg2)}
.cmp-name{display:flex;align-items:center;gap:10px}
.cmp-name-icon{width:34px;height:34px;background:var(--bg2);border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:16px;flex-shrink:0}
.cmp-name b{font-size:14px;color:var(--txt)}
.cmp-badge{display:inline-block;padding:3px 10px;border-radius:6px;font-size:11px;font-weight:600}
.cmp-badge.free{color:var(--green);background:var(--green-g)}
.cmp-badge.freemium{color:var(--amber);background:var(--amber-g)}
.cmp-stars{color:var(--amber);font-size:13px;letter-spacing:1px}
.cmp-score{font-weight:700;color:var(--indigo);font-size:15px}

/* ARTICLE GRID */
.art-section{max-width:var(--maxw);margin:0 auto;padding:0 24px 48px}
.art-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px;flex-wrap:wrap;gap:8px}
.art-title{font-size:20px;font-weight:800}
.art-more{font-size:13px;color:var(--indigo);font-weight:500;transition:color .15s}.art-more:hover{color:var(--indigo2)}
.art-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.art-card{background:#fff;border:1px solid var(--border);border-radius:14px;overflow:hidden;transition:all .2s;cursor:pointer}
.art-card:hover{border-color:var(--indigo);transform:translateY(-3px);box-shadow:var(--shadow-lg)}
.art-card-top{height:120px;position:relative;display:flex;align-items:center;justify-content:center}
.art-card-top .card-emoji{font-size:36px;opacity:.2}
.art-card-top .card-type{position:absolute;top:10px;left:12px;font-size:10px;font-weight:600;padding:3px 10px;border-radius:6px}
.card-type.editor{color:var(--indigo);background:var(--indigo-g)}
.card-type.converter{color:var(--blue);background:var(--blue-g)}
.card-type.tools{color:var(--green);background:var(--green-g)}
.card-type.repair{color:var(--amber);background:var(--amber-g)}
.art-card-body{padding:16px}
.art-card-body h3{font-size:14px;font-weight:700;line-height:1.4;margin-bottom:6px;color:var(--txt);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.art-card-body p{font-size:12px;color:var(--txt2);line-height:1.6;margin-bottom:10px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.art-card-meta{display:flex;gap:10px;font-size:11px;color:var(--txt3)}

/* WHY OFFLINE */
.why-section{max-width:var(--maxw);margin:0 auto;padding:0 24px 48px}
.why-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.why-card{background:#fff;border:1px solid var(--border);border-radius:14px;padding:24px;text-align:center;transition:all .2s}
.why-card:hover{border-color:var(--indigo);transform:translateY(-2px);box-shadow:var(--shadow)}
.why-card-icon{font-size:28px;margin-bottom:10px}
.why-card h3{font-size:14px;font-weight:700;margin-bottom:4px;color:var(--txt)}.why-card p{font-size:12px;color:var(--txt3);line-height:1.6}

/* CTA */
.cta-section{max-width:var(--maxw);margin:0 auto;padding:0 24px 48px}
.cta-box{background:var(--indigo);border-radius:16px;padding:48px;text-align:center;position:relative;overflow:hidden}
.cta-box h2{font-size:24px;font-weight:800;margin-bottom:10px;color:#fff}
.cta-box h2 em{font-style:normal;color:var(--orange)}
.cta-box p{color:rgba(255,255,255,0.8);font-size:14px;margin-bottom:24px;max-width:480px;margin-left:auto;margin-right:auto}
.btn-white{background:#fff;color:var(--indigo);padding:12px 24px;border-radius:10px;font-size:14px;font-weight:600;display:inline-flex;align-items:center;gap:7px;transition:all .2s;box-shadow:0 4px 15px rgba(0,0,0,0.1)}
.btn-white:hover{transform:translateY(-1px);box-shadow:0 6px 20px rgba(0,0,0,0.15)}
.cta-box .ver{font-size:12px;color:rgba(255,255,255,0.5);margin-top:14px}

/* --- ARTICLE PAGE --- */
.layout{max-width:var(--maxw);margin:0 auto;padding:32px 24px;display:grid;grid-template-columns:1fr 300px;gap:32px}
.breadcrumb{font-size:13px;color:var(--txt3);margin-bottom:18px;display:flex;align-items:center;gap:6px;flex-wrap:wrap}
.breadcrumb a{color:var(--txt2);transition:color .15s}.breadcrumb a:hover{color:var(--indigo)}
.breadcrumb-sep{color:var(--txt3);opacity:.5}.breadcrumb-current{color:var(--txt3);font-size:12px}
.art-page{max-width:780px;padding:100px 0 60px}
.art-tag{display:inline-block;font-size:11px;font-weight:600;padding:3px 10px;border-radius:6px;margin-bottom:10px}
.art-tag.editor{color:var(--indigo);background:var(--indigo-g)}.art-tag.converter{color:var(--blue);background:var(--blue-g)}.art-tag.tools{color:var(--green);background:var(--green-g)}.art-tag.repair{color:var(--amber);background:var(--amber-g)}
.art-page h1{font-size:30px;font-weight:800;line-height:1.3;margin-bottom:14px;letter-spacing:-.01em}
.art-page .meta{font-size:13px;color:var(--txt3);margin-bottom:24px;display:flex;gap:16px;flex-wrap:wrap}
.art-page .cover{width:100%;border-radius:var(--r);overflow:hidden;margin-bottom:28px;border:1px solid var(--border)}
.art-page .cover img{width:100%;height:auto}

/* TOC */
.toc{background:var(--bg2);border:1px solid var(--border);border-radius:var(--r);padding:18px 22px;margin-bottom:24px}
.toc h3{font-size:14px;font-weight:700;margin-bottom:8px;color:var(--txt)}
.toc ul{margin-left:0;font-size:13px;line-height:2.2;list-style:none}
.toc ul li{padding-left:16px;position:relative}.toc ul li::before{content:'›';color:var(--indigo);font-weight:700;position:absolute;left:0}
.toc a{color:var(--txt2);transition:color .12s}.toc a:hover{color:var(--indigo)}

/* ARTICLE BODY */
.art-body h2{font-size:22px;font-weight:800;margin:36px 0 16px;padding-bottom:10px;border-bottom:3px solid var(--indigo)}
.art-body h3{font-size:18px;font-weight:700;margin:28px 0 12px;color:var(--txt)}
.art-body p{font-size:15px;line-height:1.85;margin-bottom:16px;color:var(--txt2)}
.art-body ul,.art-body ol{margin:12px 0 20px 24px;font-size:15px;line-height:1.85;color:var(--txt2)}
.art-body li{margin-bottom:6px}
.art-body strong{color:var(--txt)}
.art-body blockquote{background:var(--indigo-g);border-left:4px solid var(--indigo);padding:16px 20px;border-radius:0 var(--r2) var(--r2) 0;margin:20px 0;color:var(--txt2);font-size:14px}
.art-body code{background:var(--bg3);padding:2px 6px;border-radius:4px;font-size:13px;color:var(--indigo)}
.art-body pre{background:var(--bg2);padding:16px;border-radius:var(--r);overflow-x:auto;margin:16px 0;font-size:13px;line-height:1.6;border:1px solid var(--border)}
.art-body pre code{background:none;color:var(--txt2);padding:0}
.art-body img{max-width:100%;height:auto;border-radius:var(--r);margin:20px 0;border:1px solid var(--border)}
.highlight-box{background:var(--bg2);border:1px solid var(--border);border-left:4px solid var(--indigo);border-radius:var(--r);padding:20px;margin:20px 0}
.highlight-box h4{font-size:15px;font-weight:700;color:var(--indigo);margin-bottom:8px}

/* INLINE DOWNLOAD CTA */
.dl-inline{background:var(--indigo);border-radius:var(--r);padding:24px;margin:28px 0;display:flex;align-items:center;justify-content:space-between;gap:20px}
.dl-inline-left{display:flex;align-items:center;gap:14px;flex:1}
.dl-inline-icon{width:44px;height:44px;background:rgba(255,255,255,0.15);border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:20px;flex-shrink:0}
.dl-inline-info h4{font-size:14px;font-weight:700;color:#fff;margin-bottom:2px}
.dl-inline-info p{font-size:12px;color:rgba(255,255,255,0.75);margin:0}
.dl-inline-btn{background:#fff;color:var(--indigo);padding:10px 22px;border-radius:8px;font-size:13px;font-weight:700;white-space:nowrap;display:inline-flex;align-items:center;gap:6px;transition:all .15s;flex-shrink:0}
.dl-inline-btn:hover{transform:translateY(-1px);box-shadow:0 4px 12px rgba(0,0,0,0.15)}

/* TABLE */
.tbl{width:100%;border-collapse:separate;border-spacing:0;background:#fff;border-radius:var(--r);overflow:hidden;border:1px solid var(--border);box-shadow:var(--shadow);margin:20px 0}
.tbl th{background:var(--bg2);padding:12px 14px;font-size:12px;font-weight:600;text-transform:uppercase;letter-spacing:.05em;color:var(--txt3);text-align:left;border-bottom:1px solid var(--border)}
.tbl td{padding:12px 14px;font-size:13px;border-bottom:1px solid var(--border);color:var(--txt2)}
.tbl tr:last-child td{border-bottom:none}.tbl tr:hover td{background:var(--bg2)}
.tbl .win{color:var(--green);font-weight:600}

/* SIDEBAR */
.sidebar{display:flex;flex-direction:column;gap:16px;align-self:start;position:sticky;top:80px}
.sb-dl{background:var(--indigo);border-radius:var(--r);padding:22px;text-align:center}
.sb-dl-icon{font-size:28px;margin-bottom:8px}
.sb-dl h3{font-size:15px;font-weight:700;color:#fff;margin-bottom:4px}
.sb-dl p{font-size:12px;color:rgba(255,255,255,0.7);margin-bottom:14px}
.sb-dl-btn{background:#fff;color:var(--indigo);padding:10px 18px;border-radius:8px;font-size:13px;font-weight:700;display:flex;align-items:center;justify-content:center;gap:6px;width:100%;transition:all .15s}
.sb-dl-btn:hover{transform:translateY(-1px);box-shadow:0 4px 12px rgba(0,0,0,0.15)}
.sb-dl-ver{font-size:10px;color:rgba(255,255,255,0.5);margin-top:8px}
.sb-search{position:relative}
.sb-search-icon{position:absolute;left:14px;top:50%;transform:translateY(-50%);width:16px;height:16px;color:var(--txt3);pointer-events:none}
.sb-search-input{width:100%;padding:11px 40px 11px 38px;background:#fff;border:1px solid var(--border);border-radius:var(--r);color:var(--txt);font-size:14px;font-family:var(--font);outline:none;transition:border-color .2s,box-shadow .2s;box-shadow:var(--shadow)}
.sb-search-input::placeholder{color:var(--txt3)}
.sb-search-input:focus{border-color:var(--indigo);box-shadow:0 0 0 3px rgba(79,70,229,0.1)}
.sb-search-kbd{position:absolute;right:12px;top:50%;transform:translateY(-50%);background:var(--bg3);border:1px solid var(--border);border-radius:4px;padding:1px 6px;font-size:11px;color:var(--txt3);font-family:var(--font);pointer-events:none;line-height:1.6}
.sb-box{background:#fff;border:1px solid var(--border);border-radius:var(--r);padding:18px;box-shadow:var(--shadow)}
.sb-box h3{font-size:14px;font-weight:700;margin-bottom:12px;padding-bottom:10px;border-bottom:1px solid var(--border)}
.sb-box a{font-size:13px;line-height:1.5;color:var(--txt2);display:block;margin-bottom:8px;transition:color .15s}.sb-box a:hover{color:var(--indigo)}
.tags{display:flex;flex-wrap:wrap;gap:6px}
.tag{padding:4px 10px;border-radius:14px;font-size:11px;color:var(--txt2);background:var(--bg2);border:1px solid var(--border);transition:all .15s;cursor:pointer}
.tag:hover{color:var(--indigo);border-color:var(--indigo);background:var(--indigo-g)}

/* FOOTER */
.foot{border-top:1px solid var(--border);margin-top:48px;background:var(--bg2)}
.foot-inner{max-width:var(--maxw);margin:0 auto;padding:24px;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:16px}
.foot-links{display:flex;gap:20px}
.foot-links a{font-size:13px;color:var(--txt3);transition:color .12s}.foot-links a:hover{color:var(--indigo)}
.foot-copy{font-size:12px;color:var(--txt3)}

/* MOBILE */
@media(max-width:768px){.nav-links,.nav-dl{display:none}.hero{grid-template-columns:1fr;padding:80px 20px 40px;gap:28px}.hero h1{font-size:26px}.hero-right{display:none}.cat-grid,.why-grid{grid-template-columns:1fr 1fr}.art-grid{grid-template-columns:1fr}.cmp-table{font-size:11px}.cmp-table th,.cmp-table td{padding:8px 6px}.cmp-badge{display:none}.layout{grid-template-columns:1fr}.sidebar{display:none}.art-page h1{font-size:22px}.dl-inline{flex-direction:column;text-align:center}.dl-inline-left{flex-direction:column}}