:root{--navy:#0F1B33;--ink:#1E293B;--blue:#2457F5;--blue-deep:#1C47CF;--blue-soft:#E8EEFF;--blue-wash:#F3F6FF;--accent:#FF6B2C;--accent-soft:#FFF1EA;--bg:#F7F8FB;--gray:#5B6578;--light:#94A0B4;--line:#E3E7EF;--font:"Hiragino Sans","Hiragino Kaku Gothic ProN","Noto Sans JP",system-ui,sans-serif}
*{box-sizing:border-box}html,body{overflow-x:clip}
body{margin:0;font-family:var(--font);color:var(--ink);background:#fff;-webkit-font-smoothing:antialiased;line-height:1.8}
img{max-width:100%;display:block}a{color:var(--blue)}
.wrap{max-width:1140px;margin:0 auto;padding:0 24px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:10px;padding:13px 20px;font-weight:800;font-size:14.5px;text-decoration:none;white-space:nowrap;border:1px solid transparent}
.btn.primary{background:var(--blue);color:#fff;box-shadow:0 10px 24px -10px rgba(36,87,245,.7)}.btn.primary:hover{background:var(--blue-deep)}
.btn.ghost{background:#fff;color:var(--navy);border-color:#CFD6E4}
header.top{position:sticky;top:0;z-index:40;background:rgba(255,255,255,.94);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
header.top .wrap{display:flex;align-items:center;gap:20px;height:64px}
.wm{display:flex;align-items:center;gap:9px;font-weight:900;font-size:18px;letter-spacing:-.02em;color:var(--navy);text-decoration:none;white-space:nowrap}
.wm i{width:28px;height:28px;border-radius:8px;background:linear-gradient(135deg,var(--blue) 0%,var(--blue) 60%,var(--accent) 100%);position:relative;flex:none}
.wm i::after{content:"";position:absolute;left:9px;top:9px;width:10px;height:10px;border-radius:2.5px;background:#fff}
.wm em{font-style:normal;color:var(--blue)}
nav.gn{display:flex;gap:22px;margin-left:auto;font-size:13.5px;font-weight:700}
nav.gn a{color:var(--gray);text-decoration:none}nav.gn a:hover{color:var(--navy)}
header.top .btn{padding:10px 16px;font-size:13.5px}
@media(max-width:820px){nav.gn{display:none}header.top .btn{margin-left:auto}}
.crumb{font-size:12.5px;color:var(--light);margin:22px 0 0}.crumb a{color:var(--gray);text-decoration:none}.crumb span{margin:0 6px}
.layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:48px;margin:18px 0 80px}
@media(max-width:980px){.layout{grid-template-columns:1fr}.side{display:none}}
article h1{font-size:30px;line-height:1.45;color:var(--navy);margin:8px 0 14px;letter-spacing:-.01em}
@media(max-width:600px){article h1{font-size:23px}}
.meta{display:flex;flex-wrap:wrap;gap:8px 16px;align-items:center;font-size:12.5px;color:var(--gray)}
.cat{display:inline-block;background:var(--blue-soft);color:var(--blue);font-weight:800;font-size:12px;border-radius:6px;padding:3px 10px;text-decoration:none}
.byline{display:flex;align-items:center;gap:8px}.byline img{width:26px;height:26px;border-radius:50%;object-fit:cover}
.hero-og{border-radius:14px;margin:22px 0 6px;border:1px solid var(--line);aspect-ratio:1200/630;width:100%;height:auto;object-fit:cover}
.lead{font-size:16px;color:var(--ink);margin:22px 0}
.toc{background:var(--bg);border:1px solid var(--line);border-radius:12px;padding:18px 22px;margin:26px 0}
.toc b{font-size:13px;color:var(--navy)}.toc ol{margin:8px 0 0;padding-left:20px;font-size:14px}.toc a{color:var(--ink);text-decoration:none}.toc a:hover{color:var(--blue)}
article h2{font-size:22px;line-height:1.5;color:var(--navy);margin:52px 0 16px;padding:0 0 10px;border-bottom:2px solid var(--line);position:relative;scroll-margin-top:84px}
article h2::after{content:"";position:absolute;left:0;bottom:-2px;width:64px;height:2px;background:var(--blue)}
article p{font-size:15.5px;margin:0 0 16px}
article ul,article ol{font-size:15.5px;padding-left:22px;margin:0 0 18px}article li{margin:4px 0}
ol.steps{counter-reset:s;list-style:none;padding:0}ol.steps li{counter-increment:s;position:relative;padding:10px 0 10px 44px;border-bottom:1px dashed var(--line)}
ol.steps li::before{content:counter(s);position:absolute;left:0;top:10px;width:28px;height:28px;border-radius:50%;background:var(--blue);color:#fff;font-weight:800;font-size:13px;display:flex;align-items:center;justify-content:center}
.tbl{overflow-x:auto;margin:0 0 20px;border:1px solid var(--line);border-radius:10px}
table{border-collapse:collapse;width:100%;font-size:14px;min-width:520px}caption{text-align:left;font-size:12.5px;color:var(--gray);padding:10px 14px 0;caption-side:top}
th{background:var(--bg);color:var(--navy);text-align:left;font-weight:800;padding:10px 14px;border-bottom:1px solid var(--line);white-space:nowrap}
td{padding:10px 14px;border-bottom:1px solid var(--line);vertical-align:top}tr:last-child td{border-bottom:0}
.note{font-size:13px;color:var(--gray);background:var(--bg);border-radius:8px;padding:10px 14px;margin:0 0 18px}
.point{border:2px solid var(--blue);border-radius:12px;padding:14px 18px 6px;margin:0 0 20px;background:var(--blue-wash)}.point b{color:var(--blue);font-size:12px;letter-spacing:.12em}
.cta{margin:44px 0;border-radius:16px;padding:28px;background:linear-gradient(135deg,#0F1B33,#1d3570);color:#fff;display:grid;grid-template-columns:1fr auto;gap:20px;align-items:center}
.cta h3{margin:0 0 6px;font-size:19px;line-height:1.5}.cta p{margin:0;font-size:13.5px;opacity:.85}.cta .btns{display:flex;flex-direction:column;gap:10px}
@media(max-width:700px){.cta{grid-template-columns:1fr}}
.faq h2{margin-top:56px}.faq details{border:1px solid var(--line);border-radius:10px;padding:14px 18px;margin:0 0 10px}.faq summary{font-weight:800;color:var(--navy);cursor:pointer;font-size:15px}.faq details p{margin:10px 0 0}
.author{display:flex;gap:18px;border:1px solid var(--line);border-radius:14px;padding:22px;margin:48px 0 0;background:#fff}
.author img{width:76px;height:76px;border-radius:50%;object-fit:cover;flex:none}.author b{color:var(--navy)}.author small{color:var(--gray);display:block;font-size:12.5px}.author p{font-size:13.5px;color:var(--gray);margin:8px 0 0}
.rel{margin:48px 0 0}.rel h2{font-size:18px}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:18px}
.card{border:1px solid var(--line);border-radius:14px;overflow:hidden;text-decoration:none;color:var(--ink);background:#fff;display:flex;flex-direction:column;transition:box-shadow .15s,transform .15s}
.card:hover{box-shadow:0 14px 30px -14px rgba(15,27,51,.25);transform:translateY(-2px)}
.card img{aspect-ratio:1200/630;object-fit:cover;width:100%;height:auto;border-bottom:1px solid var(--line)}
.card div{padding:14px 16px 16px}.card h3{font-size:15px;line-height:1.55;margin:8px 0 6px;color:var(--navy)}.card small{color:var(--light);font-size:12px}
.side .box{position:sticky;top:88px;border:1px solid var(--line);border-radius:14px;padding:20px;background:var(--bg)}
.side h4{margin:0 0 8px;font-size:15px;color:var(--navy);line-height:1.5}.side p{font-size:13px;color:var(--gray);margin:0 0 14px}.side .btn{width:100%;margin-top:8px}
.side ul{list-style:none;padding:0;margin:18px 0 0;font-size:13px;border-top:1px solid var(--line);padding-top:14px}.side li{margin:6px 0}.side li a{color:var(--ink);text-decoration:none}
.list-hero{padding:48px 0 18px}.list-hero h1{font-size:30px;color:var(--navy);margin:0 0 8px}.list-hero p{color:var(--gray);margin:0;font-size:14.5px}
.tabs{display:flex;flex-wrap:wrap;gap:8px;margin:22px 0 26px}.tabs a{border:1px solid var(--line);border-radius:30px;padding:6px 16px;font-size:13px;font-weight:700;color:var(--gray);text-decoration:none}.tabs a.on{background:var(--navy);color:#fff;border-color:var(--navy)}
footer{border-top:1px solid var(--line);padding:28px 0 90px;font-size:12.5px;color:var(--gray)}footer .wrap{display:flex;flex-wrap:wrap;gap:12px 24px;align-items:center}footer a{color:var(--gray);text-decoration:none}
.mcta{display:none}@media(max-width:700px){.mcta{display:block;position:fixed;left:12px;right:12px;bottom:12px;z-index:50}.mcta .btn{width:100%}header.top .btn{display:none}}