:root{
  --navy:#09234a;--navy2:#123d66;--green:#167c5d;--green2:#25a878;--mint:#eaf8f2;
  --orange:#f47a20;--gold:#f7c948;--red:#c73f31;--ink:#172b3a;--muted:#5c6e7b;
  --line:#dbe6ec;--soft:#f5f9fb;--white:#fff;--max:1120px;
  --shadow:0 18px 48px rgba(9,35,74,.12);--soft-shadow:0 10px 28px rgba(9,35,74,.08);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;color:var(--ink);background:#fff;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans JP","Yu Gothic",Meiryo,sans-serif;line-height:1.75;overflow-x:hidden}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
button,input,select,textarea{font:inherit}
.container{width:min(calc(100% - 36px),var(--max));margin:auto}
.section{padding:76px 0}.section-soft{background:var(--soft)}.section-mint{background:linear-gradient(180deg,#f6fffb,#eef8f4)}.section-dark{background:linear-gradient(135deg,var(--navy),#144f56);color:#fff}
.eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--green);font-size:12px;font-weight:950;letter-spacing:.12em;text-transform:uppercase}.eyebrow:before{content:"";width:25px;height:3px;background:var(--orange);border-radius:999px}
h1,h2,h3{margin:0;line-height:1.28;letter-spacing:-.025em}h1{font-size:clamp(36px,5.5vw,62px);font-weight:1000}h2{font-size:clamp(28px,4vw,43px);font-weight:1000}h3{font-size:clamp(20px,2.3vw,26px);font-weight:950}
p{margin:0}.muted{color:var(--muted)}.small{font-size:13px}.tiny{font-size:12px}.accent{color:var(--orange)}.center{text-align:center}.anchor{scroll-margin-top:96px}
.header{position:sticky;top:0;z-index:1000;background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);backdrop-filter:blur(12px)}
.header-inner{min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:18px}.brand{display:flex;align-items:center;gap:12px;min-width:0}.brand img{width:auto;height:42px}.brand-copy{font-weight:950;color:var(--navy);line-height:1.2}.brand-copy span{display:block;margin-top:3px;color:var(--muted);font-size:10px;letter-spacing:.03em}.nav{display:flex;align-items:center;gap:4px;flex-wrap:wrap;justify-content:flex-end}.nav a{padding:9px 10px;border-radius:10px;color:var(--navy);font-size:13px;font-weight:850}.nav a:hover{background:var(--mint)}
.header-actions{display:flex;gap:8px}.btn{display:inline-flex;min-height:50px;align-items:center;justify-content:center;padding:0 20px;border:0;border-radius:999px;font-weight:950;cursor:pointer;transition:.18s ease}.btn:hover{transform:translateY(-2px)}.btn-primary{background:var(--orange);color:#fff;box-shadow:0 10px 24px rgba(244,122,32,.25)}.btn-green{background:var(--green);color:#fff}.btn-light{background:#fff;color:var(--navy);border:1px solid var(--line)}.btn-line{background:#06b54a;color:#fff}
.breadcrumbs{padding:13px 0;border-bottom:1px solid var(--line);background:#f8fbfd;color:var(--muted);font-size:12px}.breadcrumbs ol{list-style:none;display:flex;gap:7px;flex-wrap:wrap;padding:0;margin:0}.breadcrumbs li+li:before{content:"/";margin-right:7px;color:#9badb8}.breadcrumbs a{text-decoration:underline}
.hero{position:relative;overflow:hidden;background:linear-gradient(135deg,#eef8ff 0%,#fff 48%,#edf9f1 100%)}.hero:before{content:"";position:absolute;right:-140px;top:-180px;width:520px;height:520px;border-radius:50%;background:rgba(37,168,120,.10)}
.hero-grid{position:relative;display:grid;grid-template-columns:1.04fr .96fr;align-items:stretch;min-height:610px}.hero-copy{padding:74px 54px 66px 0;display:flex;flex-direction:column;justify-content:center}.hero-copy h1{margin-top:15px;color:var(--navy)}.hero-copy .lead{margin-top:20px;font-size:clamp(17px,2vw,21px);font-weight:750;color:#344d5d}.hero-answer{margin-top:24px;padding:18px 20px;border-left:5px solid var(--orange);border-radius:0 18px 18px 0;background:#fff;box-shadow:var(--soft-shadow);font-weight:900}.hero-actions{display:flex;gap:11px;flex-wrap:wrap;margin-top:25px}.hero-notes{display:flex;gap:13px;flex-wrap:wrap;margin-top:20px;color:var(--muted);font-size:12px;font-weight:800}.hero-notes span:before{content:"✓";margin-right:5px;color:var(--green);font-weight:1000}
.hero-media{position:relative;min-height:610px;overflow:hidden}.hero-media img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}.hero-media:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(255,255,255,.22),transparent 35%),linear-gradient(0deg,rgba(9,35,74,.45),transparent 42%)}.hero-caption{position:absolute;left:26px;right:26px;bottom:24px;z-index:2;padding:16px 18px;border:1px solid rgba(255,255,255,.3);border-radius:18px;background:rgba(9,35,74,.78);backdrop-filter:blur(8px);color:#fff}.hero-caption strong{display:block;font-size:20px}.hero-caption span{display:block;margin-top:4px;font-size:12px;color:rgba(255,255,255,.8)}
.trust-bar{background:#fff;border-block:1px solid var(--line)}.trust-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px}.trust-item{padding:20px;text-align:center;border-right:1px solid var(--line)}.trust-item:last-child{border-right:0}.trust-item strong{display:block;color:var(--navy);font-size:22px}.trust-item span{display:block;color:var(--muted);font-size:12px;font-weight:800}
.section-head{max-width:850px;margin:0 auto 34px;text-align:center}.section-head h2{margin-top:10px;color:var(--navy)}.section-head p{margin-top:13px;color:var(--muted)}
.toc{position:sticky;top:76px;z-index:50;background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);backdrop-filter:blur(10px)}.toc-inner{display:flex;gap:6px;overflow:auto;padding:8px 0;scrollbar-width:none}.toc-inner::-webkit-scrollbar{display:none}.toc a{flex:0 0 auto;padding:8px 11px;border-radius:999px;color:var(--navy);font-size:12px;font-weight:850}.toc a:hover{background:var(--mint)}
.grid{display:grid;gap:20px}.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}
.card{background:#fff;border:1px solid var(--line);border-radius:26px;padding:27px;box-shadow:var(--soft-shadow)}.card h3{color:var(--navy)}.card p{margin-top:10px;color:var(--muted)}.card-accent{border-top:5px solid var(--orange)}
.number-card{position:relative;padding-top:66px}.number-card .number{position:absolute;left:25px;top:22px;width:34px;height:34px;display:grid;place-items:center;border-radius:50%;background:var(--navy);color:#fff;font-weight:1000}
.decision{overflow:auto;border:1px solid var(--line);border-radius:22px;background:#fff;box-shadow:var(--soft-shadow)}table{width:100%;border-collapse:collapse;min-width:720px}th,td{padding:15px 17px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}th{background:#edf5f8;color:var(--navy);font-size:13px}tr:last-child td{border-bottom:0}.yes{color:var(--green);font-weight:950}.no{color:var(--red);font-weight:950}.maybe{color:#9a6400;font-weight:950}
.checks{list-style:none;margin:16px 0 0;padding:0;display:grid;gap:10px}.checks li{position:relative;padding-left:30px;color:var(--muted)}.checks li:before{content:"✓";position:absolute;left:0;top:2px;width:21px;height:21px;display:grid;place-items:center;border-radius:50%;background:var(--mint);color:var(--green);font-size:12px;font-weight:1000}
.compare-card{position:relative;overflow:hidden}.compare-card .label{display:inline-flex;padding:6px 10px;border-radius:999px;background:var(--mint);color:var(--green);font-size:12px;font-weight:950}.compare-card.recommended{border:2px solid var(--green)}.compare-card.recommended:after{content:"停電時の自由度が高い";position:absolute;right:-42px;top:24px;transform:rotate(35deg);padding:5px 47px;background:var(--green);color:#fff;font-size:10px;font-weight:950}
.formula{padding:24px;border-radius:24px;background:var(--navy);color:#fff;text-align:center}.formula strong{display:block;font-size:clamp(20px,3vw,31px)}.formula span{display:block;margin-top:8px;color:rgba(255,255,255,.74);font-size:12px}
.calculator{display:grid;grid-template-columns:1fr .8fr;gap:22px;align-items:stretch}.calc-form{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.field{display:block;color:var(--navy);font-size:13px;font-weight:900}.field input,.field select{width:100%;margin-top:6px;padding:13px 14px;border:1px solid var(--line);border-radius:13px;background:#fff}.field-full{grid-column:1/-1}.calc-result{display:flex;flex-direction:column;justify-content:center;padding:28px;border-radius:26px;background:linear-gradient(135deg,var(--navy),#156b64);color:#fff;text-align:center}.calc-result span{font-size:13px;color:rgba(255,255,255,.75);font-weight:800}.calc-result strong{display:block;margin-top:8px;font-size:clamp(48px,7vw,76px);line-height:1;letter-spacing:-.05em}.calc-result small{display:block;margin-top:13px;color:rgba(255,255,255,.74)}
.note{margin-top:18px;padding:15px 17px;border-radius:16px;background:#fff8e8;border:1px solid #f1d29a;color:#6e4900;font-size:13px;font-weight:750}.danger{background:#fff0ee;border-color:#f0b6af;color:#7f2b22}.safe{background:#eefaf5;border-color:#b9e2d2;color:#145d49}
.photo-panel{display:grid;grid-template-columns:1fr 1fr;gap:24px;align-items:center}.photo{min-height:350px;border-radius:28px;overflow:hidden;box-shadow:var(--shadow)}.photo img{width:100%;height:100%;min-height:350px;object-fit:cover}.photo-copy{padding:12px}.photo-copy h2{margin-top:10px;color:var(--navy)}.photo-copy p{margin-top:14px;color:var(--muted)}
.flow{counter-reset:flow;display:grid;gap:14px}.flow-step{position:relative;padding:22px 24px 22px 76px;border:1px solid var(--line);border-radius:20px;background:#fff;box-shadow:var(--soft-shadow)}.flow-step:before{counter-increment:flow;content:counter(flow);position:absolute;left:23px;top:22px;width:36px;height:36px;display:grid;place-items:center;border-radius:50%;background:var(--orange);color:#fff;font-weight:1000}.flow-step h3{font-size:20px;color:var(--navy)}.flow-step p{margin-top:7px;color:var(--muted)}
.priority{display:grid;gap:14px}.priority-row{display:grid;grid-template-columns:120px 1fr auto;gap:20px;align-items:center;padding:20px 22px;border:1px solid var(--line);border-radius:18px;background:#fff}.priority-level{display:inline-flex;justify-content:center;padding:7px 10px;border-radius:999px;background:var(--navy);color:#fff;font-size:12px;font-weight:950}.priority-row strong{color:var(--navy)}.priority-row small{color:var(--muted)}
.checklist{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.checkitem{display:flex;gap:12px;align-items:flex-start;padding:17px;border:1px solid var(--line);border-radius:17px;background:#fff}.checkitem input{width:20px;height:20px;margin-top:3px;accent-color:var(--green)}.checkitem strong{display:block;color:var(--navy)}.checkitem span{display:block;color:var(--muted);font-size:12px}
.faq{display:grid;gap:12px;max-width:900px;margin:auto}.faq details{border:1px solid var(--line);border-radius:18px;background:#fff;box-shadow:var(--soft-shadow);overflow:hidden}.faq summary{position:relative;padding:19px 56px 19px 21px;cursor:pointer;list-style:none;color:var(--navy);font-weight:950}.faq summary::-webkit-details-marker{display:none}.faq summary:after{content:"＋";position:absolute;right:20px;color:var(--orange);font-size:22px}.faq details[open] summary:after{content:"−"}.faq-answer{padding:18px 21px;border-top:1px solid var(--line);color:var(--muted)}
.sources{padding:21px;border:1px solid var(--line);border-radius:20px;background:#fff}.sources h3{font-size:18px}.sources ul{margin:12px 0 0;padding-left:20px}.sources a{text-decoration:underline;color:var(--green)}
.reviews{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.review{padding:22px;border:1px solid var(--line);border-radius:22px;background:#fff;box-shadow:var(--soft-shadow)}.stars{color:#f5a623;letter-spacing:2px}.review p{margin-top:9px;color:var(--muted)}.review small{display:block;margin-top:14px;color:var(--green);font-weight:850}.review-summary{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:20px;padding:20px 22px;border:2px solid #d6eade;border-radius:20px;background:linear-gradient(135deg,#fff,#effaf5)}.score{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.score strong{font-size:34px;color:var(--navy)}
.cta-box{display:grid;grid-template-columns:1fr auto;gap:28px;align-items:center;padding:38px;border-radius:30px;background:linear-gradient(135deg,var(--navy),#13685f);color:#fff;box-shadow:var(--shadow)}.cta-box h2{color:#fff}.cta-box p{margin-top:12px;color:rgba(255,255,255,.8)}.cta-actions{display:flex;gap:10px;flex-wrap:wrap;justify-content:flex-end}
.footer{padding:50px 0 110px;background:#102426;color:#dce9e5}.footer-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:40px}.footer a{text-decoration:underline}.footer p{margin-top:11px}.footer-links{display:flex;flex-wrap:wrap;gap:9px 14px;margin-top:14px;font-size:13px}.footer-related{display:grid;gap:8px;margin-top:14px}.footer-related a{display:block;padding:9px 12px;border:1px solid rgba(255,255,255,.17);border-radius:10px;background:rgba(255,255,255,.06);text-decoration:none;font-weight:800}.footer-bottom{margin-top:28px;padding-top:18px;border-top:1px solid rgba(255,255,255,.16);font-size:12px;color:rgba(255,255,255,.65)}
.sticky-mobile{display:none}
@media(max-width:980px){
  .nav{display:none}.header-actions .btn-light{display:none}.hero-grid{grid-template-columns:1fr}.hero-copy{padding:58px 0 45px}.hero-media{min-height:430px}.trust-grid{grid-template-columns:repeat(2,1fr)}.trust-item:nth-child(2){border-right:0}.trust-item:nth-child(-n+2){border-bottom:1px solid var(--line)}
  .grid-4{grid-template-columns:repeat(2,1fr)}.calculator,.photo-panel,.footer-grid{grid-template-columns:1fr}.cta-box{grid-template-columns:1fr}.cta-actions{justify-content:flex-start}.reviews{grid-template-columns:1fr 1fr}.photo{order:2}
}
@media(max-width:720px){
  body{padding-bottom:60px}.container{width:min(calc(100% - 24px),var(--max))}.section{padding:58px 0}.header-inner{min-height:70px}.brand img{height:35px}.brand-copy{font-size:14px}.brand-copy span{font-size:9px}.header-actions .btn{min-height:42px;padding:0 14px;font-size:12px}.breadcrumbs{font-size:11px}.toc{top:70px}
  .hero-copy{padding:42px 0 34px}.hero-copy h1{font-size:clamp(34px,11vw,48px)}.hero-copy .lead{font-size:16px}.hero-actions{display:grid;grid-template-columns:1fr}.hero-actions .btn{width:100%}.hero-media{min-height:330px}.hero-caption{left:14px;right:14px;bottom:14px}.hero-caption strong{font-size:17px}
  .section-head{text-align:left}.grid-2,.grid-3,.grid-4,.reviews,.checklist{grid-template-columns:1fr}.card{padding:22px;border-radius:22px}.calculator{gap:16px}.calc-form{grid-template-columns:1fr}.field-full{grid-column:auto}.photo{min-height:260px}.photo img{min-height:260px}.flow-step{padding:20px 18px 20px 64px}.flow-step:before{left:17px;top:20px}.priority-row{grid-template-columns:1fr;gap:8px}.review-summary{align-items:flex-start;flex-direction:column}.review-summary .btn{width:100%}.cta-box{padding:27px 20px}.cta-actions{display:grid;grid-template-columns:1fr}.cta-actions .btn{width:100%}.footer{padding-bottom:120px}
  .sticky-mobile{position:fixed;left:0;right:0;bottom:0;z-index:9999;display:grid;grid-template-columns:repeat(3,1fr);background:#fff;border-top:1px solid var(--line);box-shadow:0 -8px 24px rgba(9,35,74,.14)}.sticky-mobile a{height:60px;display:flex;align-items:center;justify-content:center;color:#fff;font-size:12px;font-weight:950;text-align:center}.sticky-mobile .orange{background:var(--orange)}.sticky-mobile .green{background:#06b54a}.sticky-mobile .navy{background:var(--navy)}
}