:root{--navy:#08243e;--blue:#1769e0;--cyan:#17b6c9;--ink:#132238;--muted:#64748b;--bg:#f4f7fb;--card:#fff;--line:#dbe5ef;--green:#0b9b68;--shadow:0 16px 42px rgba(12,47,82,.12)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,Arial,Helvetica,sans-serif;background:var(--bg);color:var(--ink)}a{text-decoration:none;color:inherit}.wrap{width:min(1180px,calc(100% - 28px));margin:auto}.topbar{background:#04192d;color:#dcecff;font-size:12px}.topbar .wrap{display:flex;justify-content:space-between;gap:20px;padding:9px 0}.site-header{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:50}.header-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:72px}.brand{display:flex;align-items:center;gap:11px;font-weight:900;color:var(--navy);font-size:22px}.brand-mark{width:38px;height:38px;border-radius:11px;background:linear-gradient(135deg,var(--blue),var(--cyan));display:grid;place-items:center;color:#fff;font-size:20px}.nav{display:flex;gap:5px;align-items:center;flex-wrap:wrap}.nav a{padding:10px 12px;border-radius:8px;font-size:13px;font-weight:800;color:#35506c}.nav a:hover,.nav a.active{background:#eaf3ff;color:var(--blue)}.menu-btn{display:none;border:0;background:#eaf3ff;padding:10px 13px;border-radius:8px;font-weight:800}.hero{background:radial-gradient(circle at 85% 20%,rgba(23,182,201,.22),transparent 26%),linear-gradient(135deg,#061d35,#0d4f86 58%,#1779b8);color:#fff;padding:68px 0 74px}.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:36px;align-items:center}.eyebrow{display:inline-flex;padding:7px 11px;border:1px solid rgba(255,255,255,.28);background:rgba(255,255,255,.1);border-radius:999px;font-size:12px;font-weight:900;text-transform:uppercase;letter-spacing:.08em}.hero h1{font-size:clamp(42px,7vw,70px);line-height:1.02;margin:16px 0 15px}.hero p{font-size:18px;line-height:1.7;color:#dceeff;max-width:700px}.trust-row{display:flex;gap:16px;flex-wrap:wrap;margin-top:22px;font-size:13px;font-weight:800}.trust-row span{display:flex;align-items:center;gap:6px}.converter-card{background:#fff;color:var(--ink);border-radius:20px;padding:22px;box-shadow:0 28px 80px rgba(1,16,31,.35)}.dropzone{border:2px dashed #91b9df;background:#f5faff;border-radius:16px;padding:34px 20px;text-align:center;transition:.2s}.dropzone.drag{border-color:var(--blue);background:#eaf3ff}.drop-icon{font-size:44px}.dropzone h2{margin:8px 0 6px;color:var(--navy)}.dropzone p{margin:0 0 18px;color:var(--muted);font-size:13px}.btn{border:0;border-radius:10px;padding:13px 17px;font-weight:900;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:8px}.btn-primary{background:linear-gradient(135deg,var(--blue),#0a55c7);color:#fff}.btn-secondary{background:#eaf3ff;color:#0b4d93}.btn-green{background:var(--green);color:#fff}.file-meta{margin-top:15px;padding:12px;border:1px solid var(--line);background:#fff;border-radius:10px;display:none;font-size:13px}.format-row{display:grid;grid-template-columns:1fr 50px 1fr;gap:10px;align-items:end;margin-top:16px}.field label{display:block;font-size:12px;font-weight:900;color:#405972;margin-bottom:7px}.field select,.field input,.field textarea{width:100%;border:1px solid #bfd0df;background:#fff;border-radius:9px;padding:12px;font:inherit}.swap{height:44px;border:0;border-radius:9px;background:#eef5fb;font-size:20px}.convert-actions{display:flex;gap:10px;margin-top:16px}.status{margin-top:12px;min-height:20px;color:var(--muted);font-size:12px}.ad-slot{border:2px dashed #a9bdcc;background:#fff;color:#667b8d;border-radius:10px;text-align:center;display:grid;place-items:center;min-height:92px;margin:24px auto;padding:12px;font-size:12px}.ad-slot strong{display:block;color:#34536a}.section{padding:62px 0}.section.white{background:#fff}.section-head{text-align:center;max-width:820px;margin:0 auto 28px}.section-head h2{font-size:clamp(30px,4vw,46px);color:var(--navy);margin:0 0 10px}.section-head p{color:var(--muted);line-height:1.7}.tool-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.tool-card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:20px;box-shadow:0 8px 24px rgba(13,49,82,.07);transition:.2s}.tool-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#95bde2}.tool-icon{width:48px;height:48px;border-radius:13px;background:#eaf3ff;display:grid;place-items:center;font-size:24px;margin-bottom:13px}.tool-card h3{margin:0 0 7px;color:var(--navy)}.tool-card p{margin:0;color:var(--muted);font-size:13px;line-height:1.55}.tool-card .open{display:inline-block;margin-top:13px;color:var(--blue);font-size:12px;font-weight:900}.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.feature{background:#fff;border:1px solid var(--line);border-radius:15px;padding:24px}.feature h3{color:var(--navy);margin:10px 0}.feature p{color:var(--muted);line-height:1.65;margin:0}.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.step{background:linear-gradient(145deg,#08243e,#0f568b);color:#fff;border-radius:16px;padding:24px}.step span{display:inline-grid;place-items:center;width:34px;height:34px;border-radius:50%;background:#ffd166;color:#123;font-weight:900}.step p{color:#dceeff;line-height:1.6}.faq{max-width:900px;margin:auto}.faq details{background:#fff;border:1px solid var(--line);border-radius:10px;padding:16px 18px;margin-bottom:10px}.faq summary{font-weight:900;color:var(--navy);cursor:pointer}.faq p{color:var(--muted);line-height:1.65}.page-hero{background:linear-gradient(135deg,#071f39,#0d5790);color:#fff;padding:52px 0}.page-hero h1{font-size:clamp(36px,5vw,58px);margin:0 0 10px}.page-hero p{color:#dceeff;line-height:1.7;max-width:780px}.content-card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:28px;box-shadow:var(--shadow)}.content-card h2,.content-card h3{color:var(--navy)}.content-card p,.content-card li{color:#52687c;line-height:1.75}.tool-workspace{display:grid;grid-template-columns:1fr 300px;gap:24px;align-items:start}.side-stack{display:grid;gap:16px}.side-card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px}.side-card h3{margin:0 0 10px;color:var(--navy)}.result-box{margin-top:16px;border:1px solid var(--line);border-radius:12px;padding:16px;background:#f8fbfd;display:none}.footer{background:#04192d;color:#c9dbea;padding:48px 0 22px}.footer-grid{display:grid;grid-template-columns:1.5fr repeat(3,1fr);gap:24px}.footer h3{color:#fff;margin-top:0}.footer a{display:block;color:#c9dbea;margin:9px 0;font-size:13px}.footer p{line-height:1.65;font-size:13px}.footer-bottom{border-top:1px solid #23435d;margin-top:28px;padding-top:18px;display:flex;justify-content:space-between;gap:15px;flex-wrap:wrap;font-size:12px}.notice{padding:13px 15px;border-left:4px solid #e0a422;background:#fff8e5;color:#5b481b;border-radius:0 8px 8px 0;font-size:13px;line-height:1.6}.hidden{display:none!important}
@media(max-width:960px){.hero-grid,.tool-workspace{grid-template-columns:1fr}.tool-grid{grid-template-columns:repeat(2,1fr)}.feature-grid,.steps{grid-template-columns:1fr}.footer-grid{grid-template-columns:repeat(2,1fr)}.nav{display:none}.nav.open{display:flex;position:absolute;top:72px;left:0;right:0;background:#fff;flex-direction:column;padding:14px;border-bottom:1px solid var(--line)}.menu-btn{display:block}}
@media(max-width:600px){.hero{padding:48px 0}.hero h1{font-size:42px}.tool-grid,.footer-grid{grid-template-columns:1fr}.format-row{grid-template-columns:1fr}.swap{width:50px;margin:auto;transform:rotate(90deg)}.convert-actions{flex-direction:column}.topbar .wrap{justify-content:center}.topbar .wrap span:last-child{display:none}}