:root{--r:#e11d2e;--rd:#b91424;--b:#1d4ed8;--bd:#1639a8;--ink:#0f172a;--mut:#566074;--line:#e3e7ee;--soft:#f5f7fb}
*{box-sizing:border-box}
@media(prefers-reduced-motion:no-preference){html{scroll-behavior:smooth}}
body{margin:0;font:16px/1.65 system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;color:var(--ink);background:#fff}
a{color:var(--b)}
:focus-visible{outline:3px solid var(--b);outline-offset:2px}
.wrap{max-width:1080px;margin:0 auto;padding:0 20px}
header{position:sticky;top:0;background:#fff;border-bottom:3px solid var(--r);z-index:10}
.nav{display:flex;align-items:center;justify-content:space-between;height:62px}
.logo{font-weight:800;font-size:1.35rem;color:var(--ink);text-decoration:none;letter-spacing:-.02em}
.logo span{color:var(--r)}
nav a{margin-left:24px;color:var(--ink);text-decoration:none;font-weight:600}
nav a:hover,nav a.on{color:var(--b)}
#menu{display:none;background:#fff;border:1px solid var(--line);border-radius:8px;padding:6px 12px;font-size:1.1rem;cursor:pointer}
.hero{text-align:center;padding:60px 0 36px;background:var(--soft);border-bottom:1px solid var(--line)}
h1{font-size:clamp(2rem,5.4vw,3.3rem);line-height:1.1;margin:0 0 14px;letter-spacing:-.03em}
h2{font-size:1.75rem;line-height:1.25;margin:0 0 14px;letter-spacing:-.01em}
h3{margin:0 0 6px;font-size:1.1rem}
.lead{color:var(--mut);max-width:620px;margin:0 auto 28px;font-size:1.12rem}
.form{display:flex;max-width:740px;margin:0 auto;border:2px solid var(--b);border-radius:14px;overflow:hidden;background:#fff}
.form input{flex:1;padding:16px 18px;font-size:1rem;border:0;min-width:0;background:transparent}
.form input:focus-visible{outline:0}
.form:focus-within{box-shadow:0 0 0 4px rgba(29,78,216,.18)}
.btn{background:var(--r);color:#fff;border:0;padding:14px 26px;font-weight:700;font-size:1rem;cursor:pointer;text-decoration:none;display:inline-block;border-radius:10px}
.btn:hover{background:var(--rd)}
.form .btn{border-radius:0}
#msg{color:var(--rd);min-height:26px;margin-top:12px;font-weight:600}
.ad{margin:26px auto;min-height:90px;max-width:970px;text-align:center}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:20px;margin:10px 0 0;text-align:left}
.card{border:1px solid var(--line);border-radius:12px;overflow:hidden;background:#fff}
.card[hidden]{display:none}
.card img{width:100%;display:block;background:var(--soft);aspect-ratio:16/9;object-fit:contain}
.bar{padding:12px 14px;display:flex;align-items:center;justify-content:space-between;gap:10px;border-top:3px solid var(--b)}
.tag{font-weight:700;line-height:1.3}.tag small{display:block;color:var(--mut);font-weight:500}
.bar .btn{background:var(--b);padding:9px 18px;font-size:.92rem}
.bar .btn:hover{background:var(--bd)}
section{padding:50px 0}
.soft{background:var(--soft)}
.feat,.steps{display:grid;gap:20px;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));margin:22px 0 0;padding:0;list-style:none}
.feat div{border-left:4px solid var(--r);padding:4px 0 4px 16px}
.feat p,.steps p{margin:0;color:var(--mut)}
.steps{counter-reset:s}
.steps li{counter-increment:s;padding:22px;background:#fff;border:1px solid var(--line);border-radius:12px}
.steps li:before{content:counter(s);display:grid;place-items:center;width:36px;height:36px;border-radius:50%;background:var(--b);color:#fff;font-weight:700;margin-bottom:12px}
details{border:1px solid var(--line);border-radius:10px;padding:14px 18px;margin-bottom:10px;background:#fff}
summary{cursor:pointer;font-weight:700}
details p{margin:10px 0 0;color:var(--mut)}
.seo{max-width:780px}
.seo p{color:#2b3548}
.page{padding:46px 20px;max-width:800px;margin:0 auto}
.post{border-bottom:1px solid var(--line);padding-bottom:26px;margin-bottom:30px}
.post h2{font-size:1.45rem}
.meta{color:var(--mut);font-size:.9rem}
label{display:block;font-weight:600;margin:16px 0 6px}
.f input,.f textarea{width:100%;padding:12px 14px;border:2px solid var(--line);border-radius:10px;font:inherit}
.f input:focus,.f textarea:focus{border-color:var(--b);outline:0}
footer{border-top:3px solid var(--b);padding:28px 0;color:var(--mut);font-size:.92rem}
footer a{margin-right:18px;color:var(--ink)}
@media(max-width:720px){#menu{display:block}nav{display:none;position:absolute;top:62px;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);padding:6px 20px}nav.open{display:block}nav a{display:block;margin:0;padding:12px 0}.form{flex-direction:column}.form .btn{border-radius:0}}
.tool{max-width:760px;margin:0 auto;padding:46px 20px}
.drop{display:block;position:relative;border:2px dashed var(--b);border-radius:14px;padding:32px;text-align:center;background:var(--soft);cursor:pointer;font-weight:600}
.drop input{position:absolute;opacity:0;width:1px;height:1px}
.drop:focus-within{box-shadow:0 0 0 4px rgba(29,78,216,.18)}
.chk{list-style:none;padding:0}
.chk li{padding:10px 14px;border-radius:10px;margin-bottom:8px;border:1px solid var(--line)}
.chk .ok{border-left:5px solid #16a34a}
.chk .bad{border-left:5px solid var(--r)}
.chk small{display:block;color:var(--mut)}
.pv{position:relative;display:inline-block;margin:0 14px 14px 0;vertical-align:top}
.pv img{display:block;width:100%;border-radius:8px}
.pv span{position:absolute;right:4px;bottom:4px;background:rgba(0,0,0,.85);color:#fff;font-size:.72rem;padding:1px 5px;border-radius:4px}
.idbox{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:1.4rem;font-weight:700;padding:14px;background:var(--soft);border-radius:10px;word-break:break-all;margin:16px 0 12px}
.err{color:var(--rd);font-weight:600}