:root{
  --ink:#10213F;
  --ink-soft:#4B5A75;
  --line:#E6EAF2;
  --bg:#FFFFFF;
  --bg-soft:#F7F9FC;
  --primary:#0EA5A0;
  --primary-soft:#E4F6F5;
  --word:#2B579A;  --word-bg:#EEF3FA;
  --excel:#217346; --excel-bg:#ECF6F0;
  --pdf:#D93025;   --pdf-bg:#FDEFEE;
  --img:#7C3AED;   --img-bg:#F4EFFD;
  --ai:#B45309;    --ai-bg:#FDF4E7;
  --calc:#0E7490;  --calc-bg:#EAF6F9;
  --util:#475569;  --util-bg:#F1F4F8;
  --accent:#EC4899; --accent-soft:#FDF1F8;
  --radius:14px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{font-family:'Inter',system-ui,sans-serif;color:var(--ink);background:var(--bg);line-height:1.55;font-size:15px;overflow-x:hidden}
h1,h2,h3,.brand{font-family:'Sora',sans-serif}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto}
button{font-family:inherit}
.wrap{max-width:1200px;margin:0 auto;padding:0 20px}
:focus-visible{outline:3px solid var(--primary);outline-offset:2px;border-radius:6px}

/* Top bar */
.topbar{border-bottom:1px solid var(--line);background:#fff;position:sticky;top:0;z-index:50}
.topbar .wrap{display:flex;align-items:center;gap:24px;height:64px}
.brand{font-weight:800;font-size:19px;letter-spacing:-.02em;display:flex;align-items:center;gap:9px;white-space:nowrap}
.brand img{height:34px;width:auto;flex:none}
nav.main{display:flex;gap:22px;font-weight:500;color:var(--ink-soft)}
nav.main a{padding:6px 0}
nav.main a:hover,nav.main a.active{color:var(--primary)}
.topbar .actions{margin-left:auto;display:flex;align-items:center;gap:10px}
.search-mini{display:flex;border:1.5px solid var(--line);border-radius:10px;overflow:hidden;background:#fff}
.search-mini input{border:0;padding:9px 12px;font-size:13.5px;font-family:inherit;outline:none;width:170px}
.search-mini button{border:0;background:var(--primary);color:#fff;padding:0 14px;cursor:pointer;font-size:14px}
.mobile-nav .search-mini{margin-top:10px}
.mobile-nav .search-mini input{flex:1;width:auto}
.btn{display:inline-block;background:var(--primary);color:#fff;font-weight:600;padding:10px 18px;border-radius:10px;font-size:14px;border:0;cursor:pointer;text-align:center}
.btn.ghost{background:transparent;color:var(--primary);border:1.5px solid var(--primary)}
.btn.big{padding:14px 26px;font-size:15px}
.btn:hover{filter:brightness(1.07)}
.menu-btn{display:none;margin-left:auto;background:none;border:1px solid var(--line);border-radius:8px;width:42px;height:42px;font-size:20px;cursor:pointer;color:var(--ink)}
.mobile-nav{display:none;background:#fff;border-bottom:1px solid var(--line);padding:8px 20px 16px}
.mobile-nav a{display:block;padding:12px 4px;font-weight:600;border-bottom:1px solid var(--bg-soft)}
.mobile-nav.open{display:block}

/* Hero */
.hero{padding:48px 0 36px;text-align:center}
.hero h1{font-size:clamp(26px,4.2vw,44px);font-weight:800;letter-spacing:-.03em;line-height:1.15}
.hero h1 em{font-style:normal;color:var(--primary)}
.hero p{color:var(--ink-soft);font-size:16px;margin:14px auto 0;max-width:560px}
.search{max-width:640px;margin:26px auto 0;display:flex;border:2px solid var(--line);border-radius:14px;overflow:hidden;box-shadow:0 8px 28px rgba(16,33,63,.06);transition:border-color .15s;background:#fff}
.search:focus-within{border-color:var(--primary)}
.search input{flex:1;min-width:0;border:0;padding:15px 18px;font-size:16px;font-family:inherit;outline:none}
.search button{border:0;background:var(--primary);color:#fff;font-weight:700;font-size:15px;padding:0 24px;cursor:pointer;flex:none}
.chips{margin-top:16px;display:flex;flex-wrap:wrap;gap:8px;justify-content:center}
.chip{font-size:13px;font-weight:500;border:1px solid var(--line);border-radius:999px;padding:8px 14px;color:var(--ink-soft);background:#fff;transition:.15s;white-space:nowrap}
.chip:hover{border-color:var(--primary);color:var(--primary);background:var(--primary-soft)}

/* Tool sections */
.section{padding:24px 0}
.section-head{display:flex;align-items:baseline;justify-content:space-between;gap:12px;margin-bottom:16px;flex-wrap:wrap}
.section-head h2{font-size:20px;font-weight:700;letter-spacing:-.02em;display:flex;align-items:center;gap:10px}
.section-head .dot{width:10px;height:10px;border-radius:3px;display:inline-block;flex:none}
.section-head a{font-size:13.5px;font-weight:600;color:var(--primary);white-space:nowrap}
.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.tool{border:1px solid var(--line);border-radius:var(--radius);padding:16px;background:#fff;transition:.15s;display:flex;flex-direction:column;gap:8px;min-width:0}
.tool:hover{border-color:transparent;box-shadow:0 10px 30px rgba(16,33,63,.10);transform:translateY(-2px)}
.tool .icon{width:42px;height:42px;border-radius:11px;display:grid;place-items:center;font-size:19px;flex:none}
.tool h3{font-size:15px;font-weight:600}
.tool p{font-size:13px;color:var(--ink-soft);line-height:1.45}
.tool .meta{margin-top:auto;display:flex;gap:6px;align-items:center;flex-wrap:wrap}
.badge{font-size:11px;font-weight:600;padding:3px 8px;border-radius:6px;white-space:nowrap}
.badge.free{background:var(--excel-bg);color:var(--excel)}
.badge.credit{background:var(--ai-bg);color:var(--ai)}
.badge.new{background:var(--primary-soft);color:var(--primary)}
.t-word .icon{background:var(--word-bg);color:var(--word)}
.t-excel .icon{background:var(--excel-bg);color:var(--excel)}
.t-pdf .icon{background:var(--pdf-bg);color:var(--pdf)}
.t-img .icon{background:var(--img-bg);color:var(--img)}
.t-ai .icon{background:var(--ai-bg);color:var(--ai)}
.t-calc .icon{background:var(--calc-bg);color:var(--calc)}
.t-util .icon{background:var(--util-bg);color:var(--util)}

/* Two-column content zone */
.content-zone{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:28px;align-items:start;padding:32px 0}
.posts{display:grid;gap:16px}
.post{display:grid;grid-template-columns:180px 1fr;gap:18px;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#fff;transition:.15s;min-width:0}
.post:hover{box-shadow:0 10px 30px rgba(16,33,63,.09)}
.post .thumb{background:linear-gradient(135deg,var(--primary-soft),var(--bg-soft));min-height:120px;display:grid;place-items:center;font-size:30px;overflow:hidden}
.post .thumb img{width:100%;height:100%;object-fit:cover}
.post .body{padding:16px 18px 16px 0;min-width:0}
.post .cat{font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.07em;color:var(--primary)}
.post h3{font-size:16px;font-weight:700;margin:5px 0 6px;letter-spacing:-.01em;line-height:1.3}
.post p{font-size:13.5px;color:var(--ink-soft)}
.post .when{font-size:12px;color:#8B99B3;margin-top:8px}
.sidebar{display:grid;gap:18px;min-width:0}
.side-card{border:1px solid var(--line);border-radius:var(--radius);padding:18px}
.side-card h3{font-size:15px;font-weight:700;margin-bottom:10px}
.side-card ul{list-style:none}
.side-card li{padding:9px 0;border-bottom:1px solid var(--bg-soft);font-size:13.5px}
.side-card li:last-child{border:0}
.side-card li a{color:var(--ink-soft);font-weight:500}
.side-card li a:hover{color:var(--primary)}

/* Ad slots */
.ad{background:var(--bg-soft);border:1px dashed #C9D3E4;border-radius:10px;display:grid;place-items:center;color:#8B99B3;font-size:12px;letter-spacing:.06em;text-transform:uppercase;font-weight:600;text-align:center;padding:8px}
.ad small{display:block;font-weight:400;text-transform:none;letter-spacing:0;margin-top:3px;color:#A5B1C7}
.ad-leaderboard{min-height:100px;margin:16px auto}
.ad-rect{min-height:260px}
.ad-tall{min-height:600px;position:sticky;top:80px}
.ad-inarticle{min-height:200px;margin:28px 0}
.ad-label{font-size:10px;color:#A5B1C7;text-transform:uppercase;letter-spacing:.1em;margin-bottom:4px;text-align:center}

/* Ad slots filled with a real banner image */
.ad.ad-filled{background:transparent;border:none;padding:0;overflow:hidden}
.ad.ad-filled img{width:100%;height:100%;object-fit:contain;border-radius:10px}
/* Leaderboard fills the available width; height follows the image's own
   aspect ratio so nothing gets stretched or cropped */
.ad-leaderboard.ad-filled{height:auto;min-height:0;margin:8px auto}
.ad-leaderboard.ad-filled img{width:100%;height:auto;display:block}

/* Tool upload dropzone */
.dropzone{border:2.5px dashed #B9C7E4;border-radius:18px;background:var(--primary-soft);text-align:center;padding:52px 20px;margin:22px 0;transition:.15s}
.dropzone:hover,.dropzone.drag{border-color:var(--primary)}
.dropzone .dz-icon{font-size:44px}
.dropzone h2{font-size:20px;font-weight:700;margin:12px 0 6px}
.dropzone p{color:var(--ink-soft);font-size:14px;margin-bottom:18px}
.dropzone .note{font-size:12px;color:#8B99B3;margin-top:14px}

/* Conversion result gallery (PDF to JPG, extract images, etc.) */
.result-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:16px;margin:24px 0}
.result-card{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#fff;transition:.15s;text-align:center}
.result-card:hover{box-shadow:0 10px 30px rgba(16,33,63,.10);transform:translateY(-2px)}
.result-card .result-thumb{width:100%;height:170px;object-fit:cover;display:block;background:var(--bg-soft)}
.result-card .result-card-footer{padding:10px 8px}
.result-card .result-card-footer .page-label{font-size:11.5px;color:var(--ink-soft);display:block;margin-bottom:6px}
.result-card .result-card-footer a{font-size:12.5px;font-weight:700;color:var(--primary)}

/* Option picker buttons (compression level, quality, etc.) */
.level-btn{border:1.5px solid var(--line);background:#fff;border-radius:10px;padding:9px 16px;font-family:inherit;font-size:13.5px;font-weight:600;color:var(--ink);cursor:pointer;text-align:center;transition:.15s}
.level-btn small{display:block;font-weight:400;color:var(--ink-soft);font-size:11.5px;margin-top:2px}
.level-btn:hover{border-color:var(--primary)}
.level-btn.active{background:var(--primary);border-color:var(--primary);color:#fff}
.level-btn.active small{color:#fff;opacity:.85}

/* Multi-file upload cards (merge/split/organize style tools) */
.file-cards{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;margin-top:20px}
.file-card{border:1px solid var(--line);border-radius:10px;padding:10px;width:130px;text-align:center;cursor:grab;background:#fff;box-shadow:0 2px 6px rgba(16,33,63,.06);transition:.15s;display:flex;flex-direction:column;align-items:center}
.file-card:hover{box-shadow:0 6px 16px rgba(16,33,63,.12);transform:translateY(-2px)}
.file-card canvas,.file-card img{display:block;max-width:110px;max-height:145px;margin-bottom:8px;object-fit:contain;border-radius:4px}
.file-card .file-card-name{font-size:11.5px;color:var(--ink-soft);word-break:break-word}
.file-card.sortable-ghost{opacity:.4}

/* How-it-works steps */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:26px 0}
.step{border:1px solid var(--line);border-radius:var(--radius);padding:18px}
.step b{display:flex;align-items:center;gap:10px;font-size:14.5px;margin-bottom:6px}
.step b span{width:26px;height:26px;border-radius:8px;background:var(--primary-soft);color:var(--primary);display:grid;place-items:center;font-size:13px;flex:none}
.step p{font-size:13px;color:var(--ink-soft)}

/* Callout / FAQ */
.callout{border-left:4px solid var(--primary);background:var(--primary-soft);border-radius:0 10px 10px 0;padding:14px 16px;margin:18px 0;font-size:14.5px}
.faq details{border:1px solid var(--line);border-radius:12px;padding:0;margin-bottom:10px;background:#fff}
.faq summary{cursor:pointer;font-weight:600;font-size:14.5px;padding:15px 18px;list-style:none;display:flex;justify-content:space-between;gap:10px}
.faq summary::after{content:"+";color:var(--primary);font-weight:700;font-size:18px}
.faq details[open] summary::after{content:"\2013"}
.faq details p{padding:0 18px 15px;color:var(--ink-soft);font-size:14px}

/* Breadcrumb / page head */
.crumb{font-size:13px;color:var(--ink-soft);padding:16px 0 0}
.crumb a{color:var(--primary);font-weight:500}
.page-head{padding:14px 0 8px}
.page-head h1{font-size:clamp(24px,3.4vw,34px);font-weight:800;letter-spacing:-.02em;line-height:1.2}
.page-head p{color:var(--ink-soft);margin-top:8px;max-width:680px}

/* Article */
.article{max-width:none;min-width:0}
.article .meta-row{display:flex;gap:14px;flex-wrap:wrap;color:#8B99B3;font-size:13px;margin:10px 0 22px}
.article .cover{border-radius:var(--radius);background:linear-gradient(135deg,var(--primary-soft),var(--bg-soft));height:280px;display:grid;place-items:center;font-size:56px;margin-bottom:26px;overflow:hidden}
.article .cover img{width:100%;height:100%;object-fit:cover}
.article h2{font-size:21px;font-weight:700;letter-spacing:-.02em;margin:28px 0 10px}
.article p{margin:0 0 14px;color:#2A3A58;font-size:15.5px;line-height:1.7}
.article ul,.article ol{margin:0 0 14px 22px;color:#2A3A58;font-size:15.5px;line-height:1.7}
.article li{margin-bottom:6px}
.article img{border-radius:10px;margin:10px 0}
.tags{display:flex;gap:8px;flex-wrap:wrap;margin:24px 0}

/* Pagination */
.pagination-area{display:flex;justify-content:center;gap:8px;margin-top:24px;flex-wrap:wrap}

/* Footer */
footer{background:#0E1B33;color:#B7C3D9;padding:40px 0 24px;font-size:13.5px;margin-top:40px}
.foot-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;margin-bottom:28px}
.foot-grid h4{color:#fff;font-size:13px;font-weight:700;text-transform:uppercase;letter-spacing:.06em;margin-bottom:12px}
.foot-grid a{display:block;padding:5px 0;color:#B7C3D9}
.foot-grid a:hover{color:#fff}
.foot-base{border-top:1px solid #23324E;padding-top:16px;display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap;font-size:12.5px;color:#8B99B3}

/* Responsive */
@media(max-width:1024px){
  .grid{grid-template-columns:repeat(3,1fr)}
  .content-zone{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:repeat(3,1fr)}
  nav.main{display:none}
  .topbar .actions .ghost{display:none}
  .menu-btn{display:block}
}
@media(max-width:700px){
  body{font-size:14.5px}
  .wrap{padding:0 16px}
  .grid{grid-template-columns:1fr 1fr;gap:10px}
  .tool{padding:14px}
  .tool .icon{width:38px;height:38px;font-size:17px}
  .hero{padding:34px 0 28px}
  .hero p{font-size:15px}
  .search{flex-direction:column;border-radius:14px}
  .search input{padding:14px 16px;text-align:center}
  .search button{padding:14px;width:100%}
  .chips{flex-wrap:nowrap;overflow-x:auto;justify-content:flex-start;padding-bottom:6px;-webkit-overflow-scrolling:touch;scrollbar-width:none}
  .chips::-webkit-scrollbar{display:none}
  .post{grid-template-columns:1fr}
  .post .thumb{min-height:110px}
  .post .body{padding:14px 16px}
  .article .cover{height:180px;font-size:42px}
  .steps{grid-template-columns:1fr}
  .ad-leaderboard{min-height:110px}
  .foot-grid{grid-template-columns:1fr 1fr;gap:20px}
  .topbar .actions .btn{padding:9px 14px;font-size:13px}
}
@media(max-width:420px){
  .grid{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr 1fr;gap:20px}
  .brand{font-size:17px}
}
@media(prefers-reduced-motion:reduce){*{transition:none!important}}