:root{
  --navy:#071d3a;--navy2:#0b2347;--text:#14213d;--muted:#66758b;
  --blue:#0a72e8;--blue-dark:#005fd7;--blue-soft:#eaf4ff;--blue-050:#f5f9ff;
  --green:#138a45;--green-soft:#eaf8ef;--amber:#b36b00;--amber-soft:#fff5dd;
  --red:#b42318;--red-soft:#fff0ee;--border:#dce6f0;--surface:#fff;--soft:#f7faff;
  --r-sm:10px;--r-md:14px;--r-lg:20px;--shadow:0 12px 32px rgba(7,29,58,.10);
  --font:"Noto Sans JP","Hiragino Kaku Gothic ProN","Yu Gothic",system-ui,sans-serif;
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:var(--font);color:var(--text);background:#fff;line-height:1.72}a{color:inherit;text-decoration:none}button,input{font:inherit}.container{width:min(1180px,calc(100% - 64px));margin:auto}.header{height:64px;border-bottom:1px solid #e7edf4;background:#fff;display:flex;align-items:center;position:sticky;top:0;z-index:30}.header .container{display:flex;align-items:center;justify-content:space-between}.brand{display:flex;align-items:center;gap:10px;font-size:16px;font-weight:800;color:var(--navy)}.brandmark{width:28px;height:28px;border-radius:8px;background:var(--navy2);display:grid;place-items:center;color:#fff;font-weight:900}.nav{display:flex;align-items:center;gap:26px;font-size:14px;font-weight:700;color:#34465f}.lang{display:flex;gap:10px;margin-left:12px}.lang b{color:var(--blue)}.mobile-menu{display:none;font-size:24px}.breadcrumb{font-size:13px;color:#74849a;padding:18px 0}.btn{min-height:52px;padding:0 24px;border:0;border-radius:10px;font-weight:800;display:inline-flex;align-items:center;justify-content:center;gap:12px;cursor:pointer}.btn.primary{background:linear-gradient(180deg,#1680f4,#0064dc);color:#fff;box-shadow:0 8px 18px rgba(10,114,232,.24)}.btn.secondary{background:#eef3f8;color:#26384f}.btn.wide{width:100%}.hero{min-height:520px;background:linear-gradient(90deg,rgba(4,18,39,.90) 0%,rgba(4,18,39,.72) 43%,rgba(4,18,39,.18) 72%),url('../assets/photo-refs/hero-battery-ref.jpg') center/cover no-repeat;display:flex;align-items:center;color:#fff}.hero-copy{max-width:620px;padding:78px 0}.eyebrow{font-size:14px;font-weight:800;letter-spacing:.03em;color:#bfe0ff;margin-bottom:12px}.hero h1{font-size:52px;line-height:1.2;margin:0 0 18px;letter-spacing:-.03em}.hero p{font-size:20px;margin:0 0 30px;max-width:540px}.hero-card{margin-top:34px;background:rgba(255,255,255,.97);color:var(--text);padding:22px;border-radius:16px;box-shadow:var(--shadow);max-width:720px}.value-row{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-bottom:16px}.value{display:flex;align-items:center;gap:9px;font-size:13px;font-weight:700}.icon-dot{width:34px;height:34px;border-radius:50%;background:var(--blue-soft);display:grid;place-items:center;color:var(--blue);font-weight:900}.recommend-strip{background:var(--blue-050);padding:22px 0 28px}.recommend-list{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;font-size:14px}.checkline{display:flex;gap:8px;align-items:center}.checkline::before{content:'✓';color:#07a4e9;font-weight:900}.section{padding:72px 0}.section.soft{background:var(--soft)}.section-title{text-align:center;max-width:760px;margin:0 auto 34px}.section-title h1,.section-title h2{margin:0 0 10px;color:var(--navy);line-height:1.35}.section-title h1{font-size:36px}.section-title h2{font-size:30px}.section-title p{margin:0;color:var(--muted)}.card{background:#fff;border:1px solid var(--border);border-radius:14px;box-shadow:0 5px 16px rgba(7,29,58,.04)}.diag-shell{max-width:980px;margin:auto}.mini-label{text-align:center;color:var(--blue);font-weight:800;font-size:13px;margin-bottom:8px}.diag-card{padding:28px;margin-bottom:18px}.diag-card legend,.diag-title{font-weight:800;color:var(--navy);font-size:18px;margin-bottom:15px}.option-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.option-grid.two{grid-template-columns:repeat(2,1fr)}.option{position:relative;display:block}.option input{position:absolute;opacity:0;pointer-events:none}.option span{min-height:56px;border:1.5px solid var(--border);border-radius:10px;background:#fff;display:flex;align-items:center;padding:12px 14px;font-size:14px;font-weight:700;transition:.15s}.option input:checked+span{border-color:var(--blue);background:#f1f7ff;box-shadow:0 0 0 2px rgba(10,114,232,.08)}.option input:focus-visible+span{outline:3px solid rgba(10,114,232,.28);outline-offset:2px}.safety{border-color:#ffd2cc;background:#fffafa}.safety-note{display:none;margin-top:12px;border-radius:10px;background:var(--red-soft);color:#7b1d16;padding:12px 14px;font-weight:700}.diag-actions{position:sticky;bottom:14px;z-index:20;background:rgba(255,255,255,.92);backdrop-filter:blur(8px);padding:12px;border:1px solid var(--border);border-radius:14px;box-shadow:var(--shadow)}.result-shell{max-width:1080px;margin:auto}.result-hero{border-radius:16px;overflow:hidden;display:grid;grid-template-columns:1.15fr .85fr;border:1px solid #cfe6d8;background:linear-gradient(90deg,#edfaf2,#f8fffb)}.result-copy{padding:34px}.result-photo{min-height:250px;background:url('../assets/photo-refs/charge-clamps-ref.jpg') center/cover no-repeat}.result-badge{display:inline-flex;align-items:center;gap:8px;background:var(--green);color:#fff;border-radius:10px;padding:10px 16px;font-weight:900;font-size:22px}.result-copy h1{font-size:34px;line-height:1.35;margin:18px 0 8px;color:#0a2415}.confidence{display:inline-flex;background:var(--amber-soft);color:#8a5400;border-radius:999px;padding:4px 10px;font-size:13px;font-weight:800}.result-copy p{color:#465c55}.result-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:22px}.info-card{padding:24px}.info-card h3{margin:0 0 14px;color:var(--navy)}.reason{display:flex;gap:10px;margin:9px 0}.reason::before{content:'✓';width:22px;height:22px;border-radius:50%;background:#dff5e7;color:var(--green);display:grid;place-items:center;font-weight:900;flex:0 0 22px}.steps{counter-reset:step}.steps li{list-style:none;display:flex;gap:12px;margin:13px 0}.steps li::before{counter-increment:step;content:counter(step);width:26px;height:26px;border-radius:50%;display:grid;place-items:center;background:#cfeaff;color:#0569d8;font-weight:900;flex:0 0 26px}.notice{margin-top:18px;padding:18px 20px;border-radius:12px;background:var(--amber-soft);border:1px solid #ffe2a5}.tester-hero{border-radius:16px;overflow:hidden;display:grid;grid-template-columns:1.05fr .95fr;background:linear-gradient(100deg,#e8f4ff,#fafdff);border:1px solid #d5e9fb}.tester-copy{padding:34px}.tester-photo{min-height:250px;background:url('../assets/photo-refs/tester-hand-ref.jpg') center/cover no-repeat}.tester-badge{display:inline-flex;background:#0b8beb;color:#fff;border-radius:10px;padding:10px 16px;font-size:22px;font-weight:900}.product-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:22px}.product{padding:18px}.product img{width:100%;height:180px;object-fit:contain;border-radius:10px;background:#fbfdff}.product small{color:var(--muted)}.product h3{margin:4px 0 8px;font-size:22px}.tags{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:16px}.tag{background:#eaf4ff;color:#0569d8;border-radius:999px;padding:4px 8px;font-size:12px;font-weight:800}.article-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.article{overflow:hidden}.article img{width:100%;aspect-ratio:16/8.5;object-fit:cover}.article-body{padding:18px}.article h3{margin:0 0 8px;font-size:18px;line-height:1.45}.article p{margin:0 0 10px;color:var(--muted);font-size:14px}.link{color:var(--blue);font-weight:800;font-size:14px}.hub-top{padding:20px 0 44px}.hub-links{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.hub-link{padding:18px}.hub-link b{display:block;color:var(--navy);margin-bottom:4px}.hub-link span{font-size:13px;color:var(--muted)}
@media(max-width:1023px){.container{width:min(100% - 48px,1180px)}.nav{gap:14px;font-size:13px}.hero h1{font-size:44px}.option-grid{grid-template-columns:repeat(2,1fr)}.product-grid{grid-template-columns:repeat(2,1fr)}.article-grid{grid-template-columns:repeat(2,1fr)}.hub-links{grid-template-columns:repeat(2,1fr)}}
@media(max-width:767px){.container{width:calc(100% - 32px)}.header{height:58px}.nav{display:none}.mobile-menu{display:block}.hero{min-height:600px;background:linear-gradient(180deg,rgba(4,18,39,.88) 0%,rgba(4,18,39,.72) 62%,rgba(4,18,39,.48) 100%),url('../assets/photo-refs/hero-battery-ref.jpg') center/cover no-repeat}.hero-copy{padding:52px 0}.hero h1{font-size:36px}.hero p{font-size:17px}.hero-card{padding:16px}.value-row{grid-template-columns:1fr}.recommend-list{grid-template-columns:1fr 1fr}.section{padding:44px 0}.section-title h1{font-size:29px}.section-title h2{font-size:25px}.diag-card{padding:20px 16px}.option-grid,.option-grid.two{grid-template-columns:1fr}.result-hero,.tester-hero{grid-template-columns:1fr}.result-photo,.tester-photo{min-height:210px;order:-1}.result-copy,.tester-copy{padding:22px}.result-copy h1{font-size:28px}.result-grid{grid-template-columns:1fr}.product-grid,.article-grid,.hub-links{grid-template-columns:1fr}.product img{height:220px}.breadcrumb{padding:12px 0}.diag-actions{bottom:8px}.recommend-list{font-size:13px}}