*{box-sizing:border-box}
body{margin:0;font-family:"Noto Sans JP",sans-serif;color:#243b4a;background:#f3f8fb;line-height:1.85;font-size:16px}
a{color:#0277bd;text-decoration:none}a:hover{text-decoration:underline}
img{max-width:100%;height:auto;display:block}
.container{max-width:1180px;margin:0 auto;padding:0 18px}
.site-header{background:#fff;box-shadow:0 1px 4px rgba(0,0,0,.06)}
.header-branding .container{display:flex;align-items:center;gap:16px;padding-top:14px;padding-bottom:14px}
.site-logo{font-size:1.35rem;font-weight:800;color:#0277bd;white-space:nowrap}.site-logo:hover{text-decoration:none}
.site-tagline{font-size:.78rem;color:#789}
.header-search{margin-left:auto}
.header-search form{display:flex;background:#eef6fb;border-radius:22px;overflow:hidden}
.header-search input{border:0;background:transparent;padding:8px 14px;font-size:.85rem;outline:none;width:180px}
.header-search button{border:0;background:transparent;padding:0 12px;cursor:pointer}
.header-nav{background:#0288d1}
.site-nav ul{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap}
.site-nav a{display:block;color:#fff;padding:12px 16px;font-size:.9rem;font-weight:500}
.site-nav a:hover{background:rgba(255,255,255,.15);text-decoration:none}
.index-hero{background:linear-gradient(120deg,#e1f5fe,#e8f7ef 60%,#fff);border-bottom:1px solid #d8eef7}
.index-hero .container{display:flex;align-items:center;gap:20px;padding:40px 18px}
.hero-icon{font-size:3rem}
.hero-text h1{margin:0 0 8px;font-size:1.85rem;color:#01579b}
.hero-text p{margin:0;color:#5a7079}
.content-wrapper{max-width:1320px;margin:26px auto;padding:0 18px;display:grid;grid-template-columns:1fr 290px;gap:28px;align-items:start}
.main-content{min-width:0}
.section-heading{font-size:1.3rem;font-weight:800;color:#222;border-left:5px solid #0288d1;border-bottom:2px solid #e3eff5;padding:2px 0 10px 14px;margin:0 0 20px}
.article-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
.article-card{position:relative;background:#fff;border:1px solid #e6eff4;border-radius:14px;overflow:hidden;display:flex;flex-direction:column;box-shadow:0 2px 8px rgba(0,0,0,.06);transition:transform .2s,box-shadow .2s}
.article-card:hover{transform:translateY(-3px);box-shadow:0 8px 22px rgba(0,0,0,.12)}
.card-overlay-link{position:absolute;inset:0;z-index:2}
.card-thumb img{width:100%;height:165px;object-fit:cover}
.card-body{padding:14px 18px;display:flex;flex-direction:column}
.category-label{display:inline-block;align-self:flex-start;font-size:.68rem;font-weight:700;color:#0277bd;background:#e3f3fb;border-radius:999px;padding:3px 11px;margin-bottom:9px}
.article-card h2{font-size:1.08rem;font-weight:700;line-height:1.5;margin:0 0 9px;color:#1f3a4a;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.article-card p{font-size:.82rem;color:#67808c;margin:0 0 10px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-meta{margin-top:auto;display:flex;align-items:center;font-size:.72rem;color:#9bb}
.card-readmore{margin-left:auto;color:#0288d1;font-weight:600}
.post{background:#fff;border:1px solid #e6eff4;border-radius:14px;padding:28px 32px;box-shadow:0 2px 10px rgba(0,0,0,.05)}
.entry-header .category-label{margin-bottom:10px}
.entry-title{font-size:1.7rem;line-height:1.45;color:#102b3a;margin:0 0 10px}
.entry-date{font-size:.78rem;color:#9bb}
.article-hero-image{margin:18px 0 24px;border-radius:12px;overflow:hidden}
.article-hero-image img{width:100%;height:300px;object-fit:cover}
.article-body h2{font-size:1.4rem;background:#eaf6fc;border-left:6px solid #0288d1;padding:10px 14px;border-radius:4px;margin:36px 0 18px}
.article-body h3{font-size:1.18rem;border-bottom:2px solid #d8eef7;padding-bottom:6px;margin:28px 0 14px;color:#0277bd}
.article-body p{margin:0 0 16px}.article-body ul,.article-body ol{margin:0 0 18px;padding-left:1.5em}.article-body li{margin:6px 0}
.article-body table{width:100%;border-collapse:collapse;margin:20px 0;font-size:.92rem}
.article-body th{background:#0288d1;color:#fff;padding:10px;text-align:left}.article-body td{border:1px solid #e0ecf2;padding:10px}
.article-body tr:nth-child(even) td{background:#f6fbfd}
.info-box{border-radius:10px;padding:16px 20px;margin:22px 0;border:1px solid}
.info-box.point{background:#fff8e1;border-color:#ffe082}.info-box.merit{background:#e8f5e9;border-color:#a5d6a7}.info-box.caution{background:#fff3e0;border-color:#ffcc80}
.card-ranking-box{border:1px solid #e0ecf2;border-top:5px solid #0288d1;border-radius:8px;padding:20px 24px;margin:24px 0;background:#fff;box-shadow:0 2px 8px rgba(0,0,0,.05)}
.card-ranking-box.rank-1{border-top-color:#d4a900}.card-ranking-box.rank-2{border-top-color:#9e9e9e}.card-ranking-box.rank-3{border-top-color:#c07838}
.article-body p>a[rel~="sponsored"]:only-child,.article-body a.btn-affiliate{display:block;max-width:460px;margin:24px auto;padding:15px 24px;background:linear-gradient(180deg,#ff9800,#f57c00);color:#fff!important;font-weight:700;text-align:center;border-radius:10px;box-shadow:0 4px 12px rgba(245,124,0,.35);text-decoration:none}
.related-articles{margin-top:30px}
.related-list{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.related-item a{display:flex;flex-direction:column;background:#fff;border:1px solid #e6eff4;border-radius:12px;overflow:hidden;box-shadow:0 2px 6px rgba(0,0,0,.05)}
.related-item a:hover{text-decoration:none;box-shadow:0 6px 16px rgba(0,0,0,.1)}
.related-thumb{width:100%;height:120px;object-fit:cover}
.related-title{padding:10px 12px;font-size:.85rem;font-weight:600;color:#1f3a4a;line-height:1.45}
.sidebar .widget{background:#fff;border:1px solid #e6eff4;border-radius:14px;padding:18px 18px;margin-bottom:22px;box-shadow:0 2px 8px rgba(0,0,0,.05)}
.widget-title{font-size:1.05rem;font-weight:800;color:#01579b;border-bottom:2px solid #e3eff5;padding-bottom:10px;margin:0 0 14px}
.sidebar-post-list{list-style:none;margin:0;padding:0}
.sidebar-post-list li{border-bottom:1px solid #eef4f8;padding-bottom:12px;margin-bottom:12px}
.sidebar-post-list li:last-child{border:0;margin:0;padding:0}
.sidebar-post-list a{display:flex;gap:10px;align-items:flex-start}.sidebar-post-list a:hover{text-decoration:none}
.spl-thumb{width:74px;height:56px;object-fit:cover;border-radius:8px;flex-shrink:0}
.spl-info{display:flex;flex-direction:column}
.spl-title{font-size:.82rem;font-weight:600;color:#1f3a4a;line-height:1.45}
.spl-date{font-size:.68rem;color:#9bb;margin-top:3px}
.sidebar-cat-list{list-style:none;margin:0;padding:0}
.sidebar-cat-list li{margin:8px 0}.sidebar-cat-list a{font-size:.9rem}
.site-footer{margin-top:40px}
.footer-widgets{background:#01425e;color:#cfe6f1;padding:34px 0}
.footer-widgets .container{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:30px}
.footer-widget h3{font-size:1rem;margin:0 0 12px;color:#fff}
.footer-widget p{font-size:.84rem;line-height:1.8}
.footer-widget ul{list-style:none;margin:0;padding:0}.footer-widget li{margin:7px 0}
.footer-widget a{color:#cfe6f1;font-size:.84rem}
.footer-bottom{background:#013347;color:#9fc4d4;padding:16px 0;text-align:center;font-size:.8rem}
.footer-bottom a{color:#9fc4d4}.foot-links{margin:0 0 6px}.copy{margin:0}
@media(max-width:920px){.content-wrapper{grid-template-columns:1fr}.sidebar{display:none}.footer-widgets .container{grid-template-columns:1fr}}
@media(max-width:680px){.article-list{grid-template-columns:1fr}.related-list{grid-template-columns:1fr}.post{padding:20px 18px}.entry-title{font-size:1.4rem}.article-body h2{font-size:1.2rem}.header-search{display:none}.article-hero-image img{height:200px}}