:root{
  --ink:#071329;
  --ink-2:#17223b;
  --muted:#667085;
  --line:#dfe6f1;
  --paper:#ffffff;
  --wash:#f4f8fc;
  --blue:#1359d8;
  --cyan:#2dbde8;
  --green:#0f8b55;
  --gold:#dda51d;
  --red:#c33a3a;
  --radius:24px;
  --shadow:0 20px 55px rgba(7,19,41,.08);
  --content:980px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;background:#eef3f8}
body{margin:0;color:var(--ink);background:var(--paper);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Hiragino Kaku Gothic ProN","Yu Gothic",Meiryo,sans-serif;line-height:1.85;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}
button{font:inherit}
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.88);backdrop-filter:blur(16px);border-bottom:1px solid rgba(223,230,241,.85)}
.header-inner{height:66px;max-width:1180px;margin:auto;padding:0 24px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:flex;align-items:center;gap:10px;font-weight:900;letter-spacing:.03em}
.brand-mark{width:34px;height:34px;border-radius:10px;background:var(--ink);color:#5ee4ff;display:grid;place-items:center;font-size:18px;box-shadow:0 8px 20px rgba(7,19,41,.18)}
.brand small{font-size:11px;color:var(--muted);font-weight:700;letter-spacing:.12em}
.header-nav{display:flex;gap:22px;font-size:13px;font-weight:800;color:#344054}
.header-nav a:hover{color:var(--blue)}
.progress{position:absolute;left:0;bottom:-1px;width:0;height:2px;background:linear-gradient(90deg,var(--blue),var(--cyan));transition:width .1s linear}
.hero{position:relative;overflow:hidden;background:radial-gradient(circle at 82% 0%,rgba(45,189,232,.16),transparent 32%),linear-gradient(180deg,#f7fbff 0%,#fff 100%);border-bottom:1px solid var(--line)}
.hero:before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(19,89,216,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(19,89,216,.04) 1px,transparent 1px);background-size:46px 46px;mask-image:linear-gradient(to bottom,#000,transparent 80%);pointer-events:none}
.hero-inner{position:relative;max-width:1080px;margin:auto;padding:72px 28px 58px}
.breadcrumb{font-size:12px;color:var(--muted);letter-spacing:.03em;margin-bottom:28px}.breadcrumb a:hover{color:var(--blue)}
.eyebrow{display:flex;align-items:center;gap:10px;color:var(--blue);font-weight:900;font-size:12px;letter-spacing:.12em;text-transform:uppercase}.eyebrow:before{content:"";width:34px;height:2px;background:var(--blue)}
h1{max-width:900px;margin:18px 0 18px;font-size:clamp(36px,6vw,72px);line-height:1.08;letter-spacing:-.045em;font-weight:950}
.hero-lead{max-width:800px;font-size:clamp(17px,2.2vw,22px);line-height:1.75;color:#344054;margin:0 0 28px}
.meta{display:flex;flex-wrap:wrap;gap:10px 18px;color:var(--muted);font-size:13px;font-weight:700}
.meta span{display:flex;align-items:center;gap:7px}
.verdict-row{display:grid;grid-template-columns:1.45fr .8fr .8fr;gap:12px;margin-top:34px;max-width:900px}
.verdict{background:rgba(255,255,255,.85);border:1px solid var(--line);border-radius:18px;padding:18px 20px;box-shadow:0 12px 36px rgba(7,19,41,.05)}
.verdict strong{display:block;font-size:11px;color:var(--muted);letter-spacing:.11em;margin-bottom:5px}.verdict b{font-size:19px}.verdict.primary{border-color:#abdff2;background:linear-gradient(135deg,#effaff,#fff)}.verdict.primary b{color:#0b4ebf}
.layout{max-width:1180px;margin:auto;padding:54px 28px 100px;display:grid;grid-template-columns:minmax(0,var(--content)) 180px;gap:36px;justify-content:center}
.article{min-width:0}
.side-rail{position:relative}.side-sticky{position:sticky;top:98px;border-left:1px solid var(--line);padding-left:18px;font-size:12px}.side-sticky strong{display:block;color:var(--muted);letter-spacing:.12em;margin-bottom:10px}.side-sticky a{display:block;padding:7px 0;color:#667085;line-height:1.45}.side-sticky a.active,.side-sticky a:hover{color:var(--blue);font-weight:800}
.figure{margin:0 0 34px;background:#fff;border:1px solid #e7edf5;border-radius:28px;padding:14px;box-shadow:var(--shadow);overflow:hidden}
.figure img{width:100%;border-radius:18px;background:#fff}
.figure figcaption{font-size:12px;color:var(--muted);padding:12px 8px 2px;text-align:center}
.intro-card{margin:0 0 56px;border-radius:var(--radius);padding:28px 30px;background:var(--ink)!important;color:#ffffff!important;-webkit-text-fill-color:#ffffff!important;box-shadow:var(--shadow);position:relative;overflow:hidden}
.intro-card:after{content:"◇";position:absolute;right:22px;bottom:-30px;font-size:130px;color:rgba(94,228,255,.1);line-height:1}.intro-card .label{color:#5ee4ff!important;-webkit-text-fill-color:#5ee4ff!important;font-size:12px;letter-spacing:.14em;font-weight:900}.intro-card p,.section .intro-card p{position:relative;z-index:1;font-size:18px;margin:10px 0 0;line-height:1.85;color:#ffffff!important;-webkit-text-fill-color:#ffffff!important}.intro-card strong,.section .intro-card p strong,.section .intro-card strong{color:#9af0ff!important;-webkit-text-fill-color:#9af0ff!important}
.toc{margin:0 0 64px;padding:26px 28px;border:1px solid var(--line);border-radius:22px;background:var(--wash)}
.toc-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}.toc h2{font-size:18px;margin:0}.toc ol{margin:0;padding-left:1.4em;columns:2;column-gap:40px}.toc li{break-inside:avoid;padding:5px 0;font-size:14px;font-weight:700;color:#344054}.toc a:hover{color:var(--blue)}
.section{scroll-margin-top:92px;margin:0 0 82px}.section-kicker{font-size:12px;color:var(--blue);font-weight:900;letter-spacing:.13em}.section h2{font-size:clamp(28px,4vw,44px);line-height:1.25;letter-spacing:-.03em;margin:8px 0 22px}.section h3{font-size:22px;line-height:1.45;margin:32px 0 10px}.section p{font-size:16px;color:#344054;margin:0 0 18px}.section p strong{color:var(--ink)}
.lead-paragraph{font-size:19px!important;line-height:1.9!important;color:#182230!important}
.callout{display:grid;grid-template-columns:44px 1fr;gap:14px;border-radius:18px;padding:20px 22px;margin:24px 0;background:#f3f8ff;border:1px solid #cfe0ff}.callout-icon{width:44px;height:44px;border-radius:14px;background:var(--blue);color:#fff;display:grid;place-items:center;font-weight:950}.callout strong{display:block;margin-bottom:2px}.callout p{margin:0;font-size:14px}.callout.green{background:#f0fbf6;border-color:#c8edda}.callout.green .callout-icon{background:var(--green)}.callout.red{background:#fff5f5;border-color:#f0caca}.callout.red .callout-icon{background:var(--red)}
.split{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:26px 0}.mini-card{border:1px solid var(--line);border-radius:20px;padding:22px;background:#fff}.mini-card .tag{font-size:11px;font-weight:900;color:var(--blue);letter-spacing:.11em}.mini-card h3{margin:5px 0 8px;font-size:20px}.mini-card p{font-size:14px;margin:0}.mini-card.good{border-top:4px solid var(--green)}.mini-card.warn{border-top:4px solid var(--red)}
.formula{border-radius:22px;background:linear-gradient(135deg,#071329,#10294f);color:#fff!important;-webkit-text-fill-color:#fff!important;padding:26px 28px;margin:28px 0}.formula small{display:block;color:#8fdff3!important;-webkit-text-fill-color:#8fdff3!important;font-weight:900;letter-spacing:.12em}.formula .equation{font-size:clamp(20px,3.2vw,31px);line-height:1.6;font-weight:900;margin:12px 0;color:#ffffff!important;-webkit-text-fill-color:#ffffff!important}.formula p,.section .formula p{color:#c9d5e7!important;-webkit-text-fill-color:#c9d5e7!important;font-size:14px;margin:0}
.kpi-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin:24px 0}.kpi{padding:20px 16px;border:1px solid var(--line);border-radius:18px;background:#fff;text-align:center}.kpi b{font-size:30px;color:var(--green);display:block;line-height:1}.kpi span{font-size:13px;color:#475467;font-weight:800;display:block;margin-top:10px}
.source-note{font-size:13px!important;color:var(--muted)!important;border-left:3px solid var(--line);padding-left:14px}
.faq{margin-top:72px}.faq h2{font-size:36px;margin-bottom:18px}.faq-item{border-top:1px solid var(--line)}.faq-item:last-child{border-bottom:1px solid var(--line)}.faq-q{width:100%;border:0;background:none;padding:20px 2px;display:flex;justify-content:space-between;gap:16px;text-align:left;font-weight:900;color:var(--ink);cursor:pointer}.faq-q:after{content:"＋";color:var(--blue);font-size:20px}.faq-item.open .faq-q:after{content:"−"}.faq-a{display:none;padding:0 2px 20px;color:#475467;font-size:15px}.faq-item.open .faq-a{display:block}
.sources{margin-top:70px;padding-top:34px;border-top:3px solid var(--ink)}.sources h2{font-size:28px}.source-list{display:grid;gap:10px}.source-list a{display:flex;justify-content:space-between;gap:20px;padding:15px 0;border-bottom:1px solid var(--line);font-size:14px;color:#344054}.source-list a:hover{color:var(--blue)}.source-list span:last-child{color:var(--blue);white-space:nowrap}
.related{margin-top:72px}.related h2{font-size:28px}.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.related-card{border:1px solid var(--line);border-radius:20px;padding:20px;background:#fff;transition:.2s}.related-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:#b5cef7}.related-card small{color:var(--blue);font-weight:900}.related-card h3{font-size:18px;line-height:1.5;margin:9px 0 14px}.related-card span{font-size:13px;color:var(--muted)}
.share-row{display:flex;gap:10px;margin-top:50px}.share-button{border:1px solid var(--line);background:#fff;border-radius:999px;padding:10px 16px;font-size:13px;font-weight:800;cursor:pointer}.share-button:hover{border-color:var(--blue);color:var(--blue)}
.disclaimer{margin-top:58px;border-radius:18px;background:#f7f8fa;padding:22px;color:#667085;font-size:12px;line-height:1.8}
.site-footer{background:var(--ink);color:#fff;padding:48px 24px}.footer-inner{max-width:1080px;margin:auto}.footer-brand{font-size:24px;font-weight:950}.footer-copy{color:#98a7bf;font-size:12px;margin-top:18px}.footer-links{display:flex;flex-wrap:wrap;gap:18px;margin-top:18px;color:#c9d5e7;font-size:13px}
.toast{position:fixed;left:50%;bottom:24px;transform:translate(-50%,20px);opacity:0;pointer-events:none;background:var(--ink);color:#fff;padding:10px 16px;border-radius:999px;font-size:13px;transition:.25s;z-index:100}.toast.show{opacity:1;transform:translate(-50%,0)}
@media(max-width:1050px){.layout{grid-template-columns:minmax(0,var(--content))}.side-rail{display:none}}
@media(max-width:720px){
  .header-inner{height:58px;padding:0 15px}.header-nav{display:none}.brand small{display:none}
  .hero-inner{padding:48px 18px 42px}.breadcrumb{margin-bottom:20px}h1{font-size:38px}.hero-lead{font-size:16px}.verdict-row{grid-template-columns:1fr 1fr}.verdict.primary{grid-column:1/-1}.verdict{padding:15px}.verdict b{font-size:16px}
  .layout{padding:30px 12px 76px}.figure{border-radius:20px;padding:5px;margin-left:0;margin-right:0;box-shadow:0 12px 36px rgba(7,19,41,.08)}.figure img{border-radius:15px}.figure figcaption{padding:10px 5px 4px}
  .intro-card{border-radius:20px;padding:23px 20px;margin-bottom:38px}.intro-card p{font-size:16px}
  .toc{padding:22px 20px;margin-bottom:52px}.toc ol{columns:1}
  .section{margin-bottom:64px}.section h2{font-size:30px}.section h3{font-size:20px}.section p{font-size:15.5px}.lead-paragraph{font-size:17px!important}
  .split{grid-template-columns:1fr}.kpi-grid{grid-template-columns:1fr 1fr}.related-grid{grid-template-columns:1fr}.source-list a{display:block}.source-list span:last-child{display:block;margin-top:5px}.share-row{flex-wrap:wrap}
}
@media(max-width:390px){.layout{padding-left:10px;padding-right:10px}.hero-inner{padding-left:15px;padding-right:15px}.figure{padding:4px}.kpi-grid{grid-template-columns:1fr}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}