:root{--bg:#f7f8fc!important;--surface:#fff!important;--surface2:#f1f3f9!important;--border:#e5e7ef!important;--accent:#6c63ff!important;--accent2:#8b5cf6!important;--accent3:#22c55e!important;--text:#171724!important;--muted:#6f7282!important;--radius:16px!important}html{background:#f7f8fc}body{background:#f7f8fc!important;color:#171724!important;-webkit-font-smoothing:antialiased}body::before,body::after{opacity:.55}header{background:rgba(255,255,255,.95)!important;border-bottom:1px solid #e8e9f0!important;box-shadow:0 4px 20px rgba(26,26,46,.04)}.logo,.logo-name,.nav-btn,.dd-link,.mobile-nav-link{color:#171724!important}.logo-sub,.nav-btn,.lang-btn,.dd-head,.mobile-nav-head{color:#73768a!important}.nav-btn:hover,.nav-btn.open,.dd-link:hover,.mobile-nav-link:hover{background:#f2f1ff!important;color:#5b52e8!important}.dropdown,.mobile-nav{background:#fff!important;border-color:#e5e7ef!important;box-shadow:0 22px 60px rgba(26,26,46,.12)!important}.mobile-nav{background:rgba(255,255,255,.985)!important}.lang-btn{border-color:#dedfea!important;background:#fff!important;color:#6f7282!important}.lang-btn.active,.lang-btn:hover{background:#6c63ff!important;border-color:#6c63ff!important;color:#fff!important}.hero{padding-top:48px!important;padding-bottom:34px!important}.hero h1{color:#171724!important;letter-spacing:-.02em}.hero p{color:#6f7282!important}.badge{background:#f2f1ff!important;border-color:#dedbff!important;color:#5b52e8!important}.hs-num,.stat-num{color:#5b52e8!important}.hs-label,.stat-label,.sec-sub,.tc-desc,.why-sub,.wc-desc,.drop-sub{color:#777a8b!important}.tools-section{padding-top:34px!important}.tc,.wc,.card,.panel,.tool-card,.feature-card,.result-box,.result,.step,.upload-box{background:#fff!important;border-color:#e5e7ef!important;color:#171724!important;box-shadow:0 8px 28px rgba(30,31,50,.045)}.tc:hover,.wc:hover,.card:hover,.tool-card:hover{border-color:#d8d4ff!important;box-shadow:0 18px 44px rgba(86,78,190,.12)!important}.tc-title,.wc-title,.drop-title,.sec-title{color:#171724!important}.tc-action{color:#5b52e8!important}.tc-num{background:#f0efff!important;color:#5b52e8!important}.why{background:#fff!important;border-top:1px solid #ececf2;border-bottom:1px solid #ececf2}.why .wc{background:#fafbfe!important}.drop-zone{background:#fff!important;border-color:#cfd2df!important;box-shadow:0 14px 42px rgba(30,31,50,.06)}.drop-zone:hover,.drop-zone.drag-over{border-color:#6c63ff!important;box-shadow:0 18px 55px rgba(108,99,255,.12)!important}.drop-icon{background:#f1efff!important}button,.btn,.primary-btn,.action-btn,.download-btn{box-shadow:none}footer{background:#15151f!important;color:rgba(255,255,255,.62)!important}footer .logo-name{color:#fff!important}footer .logo-sub{color:rgba(255,255,255,.5)!important}footer .fc a{color:rgba(255,255,255,.55)!important}footer .fc a:hover{color:#fff!important}.hero-actions{display:flex;justify-content:center;gap:10px;flex-wrap:wrap;margin:0 auto 22px}.hero-cta{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:0 19px;border-radius:12px;text-decoration:none;font-size:14px;font-weight:800;transition:.2s}.hero-cta.primary{background:#6c63ff;color:#fff;box-shadow:0 10px 24px rgba(108,99,255,.22)}.hero-cta.primary:hover{transform:translateY(-2px);box-shadow:0 14px 30px rgba(108,99,255,.28)}.hero-cta.secondary{background:#fff;color:#27273a;border:1px solid #dedfea}.hero-cta.secondary:hover{border-color:#c9c5ff;background:#faf9ff}.trust-row{display:flex;justify-content:center;gap:8px;flex-wrap:wrap;margin-top:18px}.trust-chip{background:#fff;border:1px solid #e5e7ef;border-radius:999px;padding:7px 11px;font-size:11px;color:#676a79;box-shadow:0 4px 14px rgba(30,31,50,.03)}.quick-section{max-width:1060px;margin:0 auto;padding:14px 20px 46px}.quick-panel{background:#fff;border:1px solid #e6e7ef;border-radius:18px;padding:24px;box-shadow:0 12px 36px rgba(30,31,50,.05)}.quick-title{font-size:18px;font-weight:900;margin-bottom:5px;color:#171724}.quick-sub{font-size:13px;color:#747789;margin-bottom:18px}.quick-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.quick-link{display:flex;align-items:center;gap:11px;padding:14px;border-radius:13px;text-decoration:none;color:#262638;background:#fafbfe;border:1px solid #ececf3;transition:.2s;font-size:13px;font-weight:700}.quick-link:hover{background:#f4f2ff;border-color:#d9d5ff;transform:translateY(-2px)}.quick-ico{width:38px;height:38px;border-radius:10px;background:#efedff;display:flex;align-items:center;justify-content:center;font-size:18px;flex:none}.process-section{max-width:1060px;margin:0 auto;padding:2px 20px 50px}.process-head{text-align:center;margin-bottom:20px}.process-head h2{font-size:22px;margin-bottom:5px;color:#171724}.process-head p{font-size:13px;color:#777a8b}.process-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.process-card{background:#fff;border:1px solid #e6e7ef;border-radius:16px;padding:22px;box-shadow:0 8px 28px rgba(30,31,50,.04)}.process-num{width:30px;height:30px;border-radius:9px;background:#efedff;color:#5b52e8;display:flex;align-items:center;justify-content:center;font-weight:900;margin-bottom:12px}.process-card h3{font-size:15px;color:#171724;margin-bottom:6px}.process-card p{font-size:12px;line-height:1.7;color:#767989}.tool-flow{display:flex;justify-content:center;align-items:center;gap:8px;flex-wrap:wrap;margin:0 auto 22px}.flow-chip{background:#fff;border:1px solid #e4e5ee;border-radius:999px;padding:7px 11px;font-size:11px;color:#686b7a}.flow-arrow{color:#aaaebe;font-size:12px}@media(max-width:760px){.quick-grid,.process-grid{grid-template-columns:1fr}.quick-panel{padding:18px}.hero{padding-top:34px!important}.hero-cta{width:100%;max-width:330px}.trust-row{gap:6px}}

/* Final UX polish */
.container{color:#171724!important}.hero h1,.hero h2,.hero-title{color:#171724!important}.hero p,.hero-sub,.subtitle{color:#6f7282!important}
input,select,textarea{background:#fff!important;color:#171724!important;border-color:#dfe1ea!important}input::placeholder,textarea::placeholder{color:#9a9dac!important}
.file-info,.file-card,.settings,.options,.option-card,.processing,.result-panel,.download-box{background:#fff!important;border-color:#e5e7ef!important;color:#171724!important}
.upload-btn,.compress-btn,.merge-btn,.split-btn,.convert-btn,.primary-btn,.btn-primary{background:#6c63ff!important;color:#fff!important;border-color:#6c63ff!important}
.upload-btn:hover,.compress-btn:hover,.merge-btn:hover,.split-btn:hover,.convert-btn:hover,.primary-btn:hover,.btn-primary:hover{filter:brightness(.96);transform:translateY(-1px)}
.secondary-btn,.btn-secondary{background:#fff!important;color:#333447!important;border:1px solid #dedfea!important}
.progress-wrap,.progress-bar{background:#eceef5!important}.progress-fill{background:#6c63ff!important}
.notice,.info-box,.tip,.privacy-note{background:#f7f7ff!important;border-color:#e2dfff!important;color:#5f6171!important}
.tool-related{max-width:860px;margin:26px auto 40px;padding:0 20px}.tool-related h2{font-size:18px;color:#171724;margin-bottom:12px}.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.related-link{background:#fff;border:1px solid #e6e7ef;border-radius:14px;padding:15px;text-decoration:none;color:#252638;font-size:13px;font-weight:800;box-shadow:0 7px 22px rgba(30,31,50,.035)}.related-link span{display:block;color:#777a8b;font-size:11px;font-weight:500;margin-top:4px}.related-link:hover{border-color:#d8d4ff;background:#faf9ff;transform:translateY(-1px)}
@media(max-width:760px){.related-grid{grid-template-columns:1fr}.tool-related{padding:0 16px}}

/* Shared header reliability + larger brand mark */
header .logo{gap:11px!important;min-width:max-content}
header .logo-mark{width:44px!important;height:44px!important;border-radius:12px!important;box-shadow:0 5px 18px rgba(108,99,255,.22)!important}
header .logo-mark svg{width:24px!important;height:24px!important}
header .logo-name{font-size:20px!important;line-height:1.05!important}
header .logo-sub{font-size:11px!important;margin-top:2px!important}
header .logo-icon{width:42px!important;height:42px!important;border-radius:11px!important;font-size:19px!important}
header{min-height:70px!important;height:auto!important}
.mobile-nav{top:70px!important}
@media(max-width:760px){
  header .logo-mark{width:40px!important;height:40px!important}
  header .logo-mark svg{width:22px!important;height:22px!important}
  header .logo-name{font-size:18px!important}
  header .logo-sub{font-size:10px!important}
  header .logo-icon{width:38px!important;height:38px!important}
  header{min-height:66px!important}
  .mobile-nav{top:66px!important}
}
.top .logo,.card>.logo,.head>.logo{font-size:24px!important;font-weight:900!important}
@media(max-width:760px){.top .logo,.card>.logo,.head>.logo{font-size:21px!important}}

/* Touch targets and legible links on narrow screens */
@media(max-width:760px){.menu-toggle{min-width:44px!important;min-height:44px!important}.mobile-lang .lang-btn,.mobile-nav-link{min-height:44px!important}}
header a.pro{color:#5143c5!important;background:#efedff!important}
.article-language-note{font-size:13px;color:#55596a;line-height:1.7}