:root{--color-trust:#071735;--color-compare:#19b7aa;--color-compare-soft:#69ddd1;--color-caution:#ff735f;--ink:var(--color-trust);--ink-soft:#203052;--teal:var(--color-compare);--teal-dark:#007c70;--coral:var(--color-caution);--sky:#dff6f2;--blue-soft:#eef3ff;--paper:#fff;--canvas:#f6f8fc;--line:#dbe2ef;--muted:#596783;--max:1180px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{color:var(--ink);background:var(--paper);margin:0;font-family:Hiragino Kaku Gothic ProN,Yu Gothic,YuGothic,Meiryo,system-ui,sans-serif;font-size:16px;line-height:1.8}a{color:inherit}img{max-width:100%}svg{display:block}h1,h2,h3{letter-spacing:-.03em;margin-top:0;line-height:1.28}p{margin-top:0}.sr-only{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.skip-link{z-index:100;color:#fff;background:var(--ink);padding:10px 14px;position:fixed;top:10px;left:10px;transform:translateY(-150%)}.skip-link:focus{transform:translateY(0)}.site-header{z-index:20;min-height:74px;padding:12px max(24px, calc((100vw - var(--max)) / 2));border-bottom:1px solid var(--line);backdrop-filter:blur(14px);background:#fffffff0;justify-content:space-between;align-items:center;display:flex;position:sticky;top:0}.brand{text-decoration:none;display:inline-flex}.brand-logo{color:var(--ink);letter-spacing:-.04em;align-items:center;gap:11px;font-size:1.25rem;font-weight:850;display:inline-flex}.brand-logo__mark{color:#fff;background:var(--ink);border:1px solid var(--ink);border-radius:8px 8px 8px 2px;place-items:center;width:36px;height:36px;font-family:Georgia,serif;display:grid}.brand-logo--reverse{color:#fff}.brand-logo--reverse .brand-logo__mark{color:var(--ink);background:#fff;border-color:#fff}.primary-nav{align-items:center;gap:30px;font-size:.92rem;font-weight:700;display:flex}.primary-nav a{text-decoration:none;position:relative}.primary-nav a:after{content:"";background:var(--teal);height:2px;transition:transform .2s;position:absolute;bottom:-8px;left:0;right:0;transform:scaleX(0)}.primary-nav a:hover:after,.primary-nav a[aria-current=page]:after{transform:scaleX(1)}.home-hero{min-height:620px;padding:72px max(24px, calc((100vw - var(--max)) / 2));color:#fff;background-color:var(--ink);background-image:linear-gradient(#ffffff0b 1px,#0000 1px),linear-gradient(90deg,#ffffff0b 1px,#0000 1px);background-size:44px 44px;grid-template-columns:minmax(0,1fr) minmax(440px,1fr);align-items:center;gap:clamp(32px,5vw,72px);display:grid}.kicker{color:var(--teal-dark);letter-spacing:.12em;text-transform:uppercase;margin-bottom:16px;font-size:.78rem;font-weight:850}.home-hero .kicker{color:var(--color-compare-soft)}.home-hero h1{letter-spacing:-.075em;max-width:720px;margin-bottom:28px;font-size:clamp(3.2rem,4.5vw,4.2rem)}.home-hero h1 span{color:#7ce1d5}.hero-intro{color:#dbe5f7;max-width:620px;margin-bottom:34px;font-size:clamp(1rem,1.7vw,1.2rem)}.primary-button{color:#062d2b;background:#7ce1d5;border-radius:8px;justify-content:center;align-items:center;min-height:50px;padding:11px 22px;font-weight:800;text-decoration:none;transition:transform .2s,background .2s;display:inline-flex}.primary-button:hover{background:#fff;transform:translateY(-2px)}.decision-signal{color:#fff;margin:0}.decision-signal svg{width:100%;height:auto}.decision-signal circle,.decision-signal path{vector-effect:non-scaling-stroke}.signal-inputs circle{fill:#69ddd114;stroke:var(--color-compare-soft);stroke-width:2px}.signal-inputs path{fill:none;stroke:var(--color-compare-soft);stroke-width:2.4px;stroke-linecap:round;stroke-linejoin:round}.signal-inputs text{fill:var(--color-compare-soft);text-anchor:middle;font-size:38px;font-weight:750}.signal-inputs .axis-label{fill:#fff;text-anchor:start;font-size:25px}.signal-inputs .risk circle,.signal-inputs .risk path{stroke:var(--color-caution)}.signal-inputs .risk text{fill:var(--color-caution)}.signal-paths path{stroke:var(--color-compare-soft);stroke-width:2.2px}.checkpoint{fill:var(--color-compare-soft)}.decision-arrow{fill:none;stroke:#fff;stroke-width:2.2px;stroke-linecap:round;stroke-linejoin:round}.decision-end circle{fill:#ff735f14;stroke:var(--color-caution);stroke-width:2.5px}.decision-end path{fill:none;stroke:var(--color-caution);stroke-width:4px;stroke-linecap:round;stroke-linejoin:round}.decision-end text{fill:var(--color-caution);text-anchor:middle;font-size:22px;font-weight:800}.section{width:min(var(--max), calc(100% - 48px));margin:0 auto;padding:92px 0}.section-heading{margin-bottom:32px}.section-heading h2,.method-section h2{margin-bottom:0;font-size:clamp(2rem,4vw,3.4rem)}.category-grid{grid-template-columns:1.25fr .75fr;gap:18px;display:grid}.category-panel{border:1px solid var(--line);border-radius:14px 14px 14px 4px;grid-template-columns:auto minmax(0,1fr) minmax(130px,.65fr) auto;align-items:end;gap:24px;min-height:240px;padding:34px;text-decoration:none;transition:transform .2s,box-shadow .2s;display:grid;position:relative;overflow:hidden}.category-panel:hover{transform:translateY(-4px);box-shadow:0 16px 34px #0b17361a}.category-panel h3{margin-bottom:8px;font-size:clamp(2rem,4vw,3.8rem)}.category-panel p{color:var(--ink-soft);margin:0}.panel-number{color:var(--teal-dark);align-self:start;font-weight:850}.category-signal{fill:none;stroke:currentColor;stroke-width:4px;stroke-linecap:round;stroke-linejoin:round;opacity:.9;place-self:center end;width:100%;max-width:210px}.category-signal--mobile{color:var(--teal-dark)}.category-signal--internet{color:var(--ink)}.mobile-panel{background:var(--sky)}.internet-panel{background:var(--blue-soft)}.latest-section{border-top:1px solid var(--line)}.split-heading{grid-template-columns:1fr 1fr;align-items:end;gap:42px;display:grid}.split-heading>p{max-width:560px;color:var(--muted);margin-bottom:0}.article-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;display:grid}.article-card{border:1px solid var(--line);background:#fff;border-radius:12px 12px 12px 3px;min-height:310px}.article-card a{flex-direction:column;height:100%;padding:28px;text-decoration:none;display:flex}.article-card:hover{border-color:var(--teal)}.article-card h3{margin:12px 0;font-size:1.28rem}.article-card p{color:var(--muted);font-size:.94rem}.card-category{color:var(--teal-dark);letter-spacing:.09em;text-transform:uppercase;font-size:.76rem;font-weight:850}.card-link{margin-top:auto;padding-top:20px;font-weight:800}.signal-mark{fill:none;width:94px;height:auto;stroke:var(--color-compare);stroke-width:2.2px;stroke-linecap:round;stroke-linejoin:round;margin-bottom:18px}.signal-mark--internet{stroke:var(--ink)}.method-section{padding:88px max(24px, calc((100vw - var(--max)) / 2));background:var(--canvas);border-top:1px solid var(--line)}.method-grid{grid-template-columns:repeat(3,1fr);gap:20px;margin:38px 0;display:grid}.method-grid p{border-top:3px solid var(--ink);gap:8px;padding-top:18px;display:grid}.method-grid span{color:var(--muted)}.text-link{color:var(--teal-dark);text-underline-offset:4px;font-weight:800}.breadcrumbs{width:min(var(--max), calc(100% - 48px));color:var(--muted);margin:0 auto;padding-top:28px;font-size:.85rem}.breadcrumbs ol{flex-wrap:wrap;gap:8px;margin:0;padding:0;list-style:none;display:flex}.breadcrumbs li:not(:last-child):after{content:"/";color:#9ba7bd;margin-left:8px}.breadcrumbs a{text-underline-offset:3px}.category-shell>.breadcrumbs,.article-shell>.breadcrumbs,.policy-shell>.breadcrumbs{width:100%}.category-shell,.policy-shell,.article-shell{width:min(var(--max), calc(100% - 48px));margin:0 auto}.category-hero{border-radius:18px 18px 18px 4px;min-height:360px;margin-top:28px;padding:clamp(48px,7vw,88px);position:relative;overflow:hidden}.category-hero h1{margin-bottom:18px;font-size:clamp(3.5rem,8vw,7rem)}.category-hero>p:not(.kicker){max-width:650px;margin-bottom:0;font-size:1.08rem}.category-hero .category-signal{opacity:.7;width:min(28vw,300px);position:absolute;bottom:50%;right:clamp(28px,7vw,90px);transform:translateY(50%)}.mobile-category{background:var(--sky)}.internet-category{background:var(--blue-soft)}.category-list{padding:78px 0 100px}.article-shell{max-width:var(--max)}.article-body{padding:40px 0 100px}.article-header{border-bottom:1px solid var(--line);max-width:980px;padding:20px 0 42px}.article-header .signal-mark{margin-bottom:12px}.article-header h1{margin-bottom:24px;font-size:clamp(2.4rem,4vw,3.7rem)}.article-header h1 span{display:block}.article-title__sub{color:var(--ink-soft);margin-top:4px;font-size:.72em}.article-lead{max-width:800px;color:var(--ink-soft);font-size:1.14rem}.article-meta{color:var(--muted);flex-wrap:wrap;gap:12px 26px;margin:28px 0 0;font-size:.84rem;display:flex}.article-meta div{gap:8px;display:flex}.article-meta dt{font-weight:750}.article-meta dd{margin:0}.article-layout{grid-template-columns:minmax(0,780px) minmax(220px,1fr);align-items:start;gap:clamp(48px,7vw,92px);display:grid}.article-content{min-width:0}.article-summary{color:#fff;background:var(--ink);border-radius:12px 12px 12px 3px;margin:42px 0;padding:26px}.article-summary p:last-child{margin-bottom:0}.article-summary .summary-note{color:#cbd7ea;margin-top:12px;font-size:.9rem}.summary-label{color:#7ce1d5;letter-spacing:.08em;margin-bottom:8px;font-size:.78rem;font-weight:850}.article-content>section{margin-top:56px;scroll-margin-top:100px}.article-content>section h2{border-bottom:2px solid var(--ink);margin-bottom:22px;padding-bottom:12px;font-size:clamp(1.55rem,3vw,2.15rem)}.article-content>section p{color:var(--ink-soft)}.article-toc--desktop{border-left:2px solid var(--color-compare);margin-top:42px;padding-left:22px;position:sticky;top:104px}.article-toc--desktop>p{margin-bottom:14px;font-weight:850}.article-toc ol{margin:0;padding-left:1.35rem}.article-toc li{color:var(--muted);margin:9px 0;font-size:.87rem;line-height:1.55}.article-toc a{text-underline-offset:3px}.article-toc--mobile{border:1px solid var(--line);background:var(--canvas);border-radius:8px;margin-top:28px;padding:14px 18px;display:none}.article-toc--mobile summary{cursor:pointer;color:var(--ink);font-weight:850}.article-toc--mobile ol{padding-top:12px}.table-scroll{border:1px solid var(--line);border-top:3px solid var(--color-compare);overflow-x:auto}.comparison-table{border-collapse:collapse;background:#fff;width:100%;min-width:620px}.comparison-table th,.comparison-table td{border-bottom:1px solid var(--line);text-align:left;vertical-align:top;padding:15px 18px}.comparison-table thead th{color:#fff;background:var(--ink)}.comparison-table tbody th{width:120px;color:var(--teal-dark)}.comparison-table .is-risk th{color:#ba3827}.reading-checklist{border-left:4px solid var(--color-compare);background:#effbf9;margin-top:26px;padding:24px 26px}.reading-checklist h3,.caution-box h3{margin-bottom:12px;font-size:1.2rem}.reading-checklist ul{margin:0;padding:0;list-style:none}.reading-checklist li{padding:7px 0 7px 34px;position:relative}.reading-checklist li:before{content:"";border:2px solid var(--color-compare);width:18px;height:18px;position:absolute;top:11px;left:0}.caution-box{color:var(--ink);border-left:4px solid var(--color-caution);background:#fff5f2;margin-top:26px;padding:24px 26px}.caution-box h3{color:#a92d20}.caution-box p{margin-bottom:0}.official-sources{background:var(--blue-soft);border:1px solid var(--line);padding:28px}.official-sources ul{margin-bottom:0;padding-left:1.25rem}.official-sources li{margin:10px 0}.official-sources span{color:var(--muted);font-size:.86rem;display:block}.axis-label{color:var(--teal-dark);letter-spacing:.1em;text-transform:uppercase;margin-bottom:7px;font-size:.78rem;font-weight:850}.reference-section>h3{margin:32px 0 12px;font-size:1.35rem}.reference-section--trust{border-top:4px solid var(--color-trust)}.reference-section--compare{border-top:4px solid var(--color-compare)}.reference-section--caution{border-top:4px solid var(--color-caution)}.reference-section--decision{border-top:4px solid var(--color-compare)}.reference-section{padding-top:24px}.reference-section>h2{border-bottom:0!important}.decision-cards,.risk-grid,.fit-grid,.official-check-grid,.related-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;display:grid}.decision-cards article,.risk-grid article,.fit-grid article{border:1px solid var(--line);background:#fff;border-radius:10px 10px 10px 3px;padding:22px}.decision-cards article{border-top:3px solid var(--color-compare);background:#effbf9}.decision-cards h3,.risk-grid h3,.fit-grid h3{margin-bottom:12px;font-size:1.12rem}.decision-cards p{margin:0;font-size:.93rem}.reference-table{min-width:900px;font-size:.92rem}.reference-table th:first-child{width:130px}.reference-table td{min-width:220px}.evidence-note{color:var(--muted);border-left:2px solid var(--color-compare);margin-top:14px;padding:8px 12px;font-size:.8rem;line-height:1.6}.evidence-note p{margin-bottom:3px}.evidence-note p:last-child{margin-bottom:0}.evidence-note__label{color:var(--ink);font-weight:800}.evidence-note__detail{color:var(--muted)!important}.evidence-note__source{display:inline}.evidence-note a{color:var(--teal-dark);text-underline-offset:3px;font-weight:700}.area-guidance{border-left:3px solid var(--color-compare);background:#effbf9;margin:18px 0 0;padding:14px 16px}.article-disclosure{max-width:980px;color:var(--muted);background:var(--canvas);border:1px solid var(--line);flex-wrap:wrap;gap:4px 12px;margin-top:18px;padding:10px 14px;font-size:.82rem;line-height:1.6;display:flex}.article-disclosure strong{color:var(--ink)}.article-disclosure a{color:var(--teal-dark);text-underline-offset:3px;font-weight:750}.check-list{padding:0;list-style:none}.check-list li{background:var(--canvas);border-left:3px solid var(--color-compare);margin:12px 0;padding:14px 18px}.risk-grid article{border-top:3px solid var(--color-caution);background:#fff8f6}.risk-grid ul,.fit-grid ul{margin:0;padding-left:1.2rem}.risk-grid li,.fit-grid li{margin:7px 0}.fit-grid article{border-top:3px solid var(--color-trust)}.fit-grid h4{color:var(--teal-dark);margin:18px 0 4px}.fit-grid h4.not-fit{color:#a92d20}.official-check-grid a,.related-grid a{border:1px solid var(--line);border-radius:9px 9px 9px 3px;flex-direction:column;justify-content:center;min-height:150px;padding:22px;text-decoration:none;display:flex}.official-check-grid a{color:#fff;background:var(--ink)}.official-check-grid a:hover,.official-check-grid a:focus-visible{border-color:var(--color-compare-soft)}.official-check-grid span{color:var(--color-compare-soft);margin:7px 0;font-weight:750}.official-check-grid small{color:#cbd7ea}.related-grid a{background:#effbf9;min-height:160px}.related-grid{margin:0;padding:0;list-style:none}.related-grid li{display:flex}.related-grid li a{width:100%}.related-grid a:hover{border-color:var(--color-compare)}.related-grid span{color:var(--muted);margin-top:8px;font-size:.9rem}.decision-axis-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin-top:30px;display:grid}.decision-axis-card{border:1px solid var(--line);border-top:3px solid var(--color-compare);border-radius:9px 9px 9px 3px;padding:20px 22px}.decision-axis-card--cautions{border-top-color:var(--color-caution);background:#fff8f6}.decision-axis-card h3{margin-bottom:10px;font-size:1.08rem}.decision-axis-card ul{margin:0;padding-left:1.2rem}.decision-axis-card li{color:var(--ink-soft);margin:5px 0;font-size:.92rem}.household-ledger-table{min-width:720px}.household-ledger-table th:first-child{width:155px}.household-formula{background:var(--canvas);border:1px solid var(--line);border-top:3px solid var(--color-compare);flex-wrap:wrap;align-items:center;gap:8px;margin:24px 0;padding:20px;display:flex}.household-formula strong{width:100%;margin-bottom:4px}.household-formula span:nth-of-type(odd){color:var(--ink);border:1px solid var(--line);background:#fff;border-radius:5px;padding:5px 9px}.review-steps{counter-reset:review-step;padding:0;list-style:none}.review-steps li{background:var(--canvas);border-left:3px solid var(--color-compare);counter-increment:review-step;grid-template-columns:120px 1fr;gap:16px;margin:12px 0;padding:18px 20px 18px 58px;display:grid;position:relative}.review-steps li:before{color:#fff;background:var(--color-trust);content:counter(review-step);border-radius:50%;place-items:center;width:26px;height:26px;font-size:.8rem;font-weight:800;display:grid;position:absolute;top:17px;left:18px}.review-steps span{color:var(--ink-soft)}.household-risk-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.household-risk-grid p{margin:0;font-size:.92rem}.article-actions{border-top:1px solid var(--line);flex-wrap:wrap;gap:24px;margin-top:56px;padding-top:28px;display:flex}.policy-shell{max-width:920px;padding-bottom:100px}.policy-header{border-bottom:3px solid var(--ink);padding:52px 0 42px}.policy-header h1{margin-bottom:18px;font-size:clamp(2.5rem,5vw,4.4rem)}.policy-header>p:last-child{max-width:700px;color:var(--muted);font-size:1.08rem}.policy-content{padding-top:10px}.policy-content section{border-bottom:1px solid var(--line);padding:34px 0}.policy-content h2{font-size:1.55rem}.policy-content p{color:var(--ink-soft)}.policy-content dl{margin:22px 0}.policy-content dl>div{border-bottom:1px solid var(--line);grid-template-columns:140px 1fr;gap:18px;padding:12px 0;display:grid}.policy-content dt{font-weight:800}.policy-content dd{color:var(--ink-soft);margin:0}.contact-notice{background:var(--blue-soft);border:1px solid var(--line);border-radius:12px;margin-top:44px;padding:34px}.notice-label{color:var(--coral);letter-spacing:.1em;font-size:.8rem;font-weight:850}.sitemap-grid{grid-template-columns:1fr 1fr;gap:0 50px;display:grid}.sitemap-grid ul{padding-left:20px}.sitemap-grid li{margin:9px 0}.not-found{text-align:center;min-height:610px;padding:100px max(24px,50vw - 410px)}.error-code{color:var(--coral);letter-spacing:-.08em;margin-bottom:0;font-size:clamp(5rem,14vw,10rem);font-weight:900;line-height:1}.not-found h1{font-size:clamp(2rem,5vw,3.5rem)}.site-footer{padding:60px max(24px, calc((100vw - var(--max)) / 2));color:#d9e2f3;background:var(--ink);grid-template-columns:.8fr 1.2fr;gap:40px;display:grid}.footer-brand{color:#fff;text-decoration:none;display:inline-flex}.footer-brand .brand-logo{font-size:1.45rem}.site-footer nav{grid-template-columns:repeat(2,minmax(0,1fr));align-content:start;gap:10px 24px;display:grid}.site-footer nav a{color:#d9e2f3;text-underline-offset:4px}.copyright{border-top:1px solid #ffffff29;grid-column:1/-1;margin:18px 0 0;padding-top:24px;font-size:.82rem}:focus-visible{outline:3px solid var(--coral);outline-offset:4px}@media (width<=860px){.home-hero{grid-template-columns:1fr;min-height:auto}.decision-signal{max-width:620px}.category-grid,.split-heading,.method-grid,.site-footer{grid-template-columns:1fr}.article-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.article-layout{grid-template-columns:1fr}.article-toc--desktop{display:none}.article-toc--mobile{display:block}.decision-cards,.risk-grid,.fit-grid,.decision-axis-grid{grid-template-columns:1fr}.copyright{grid-column:auto}}@media (width<=620px){.site-header{flex-direction:column;align-items:flex-start;position:static}.primary-nav{white-space:nowrap;gap:16px;width:100%;padding-bottom:4px;overflow-x:auto}.home-hero{padding-top:64px;padding-bottom:72px}.home-hero h1{font-size:2.75rem}.decision-signal{margin:0 -10px}.section,.category-shell,.policy-shell,.article-shell,.breadcrumbs{width:min(100% - 32px, var(--max))}.section{padding:68px 0}.category-panel{grid-template-columns:auto 1fr;min-height:230px;padding:24px}.category-panel .category-signal{grid-column:2;justify-self:start;width:130px}.category-panel>span:last-child{display:none}.article-grid,.sitemap-grid{grid-template-columns:1fr}.policy-content dl>div{grid-template-columns:1fr;gap:4px}.article-card{min-height:270px}.category-hero{padding:38px 24px}.category-hero .category-signal{opacity:.28;width:170px;bottom:42px;right:-36px;transform:none}.article-body{padding-top:28px}.article-header h1{font-size:2.35rem}.article-summary{margin-top:30px}.table-scroll{margin-right:-16px}.official-check-grid,.related-grid{grid-template-columns:1fr}.review-steps li{grid-template-columns:1fr;gap:4px}.official-check-grid a,.related-grid a{min-height:125px}.site-footer nav{grid-template-columns:1fr}}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,:before,:after{transition-duration:.01ms!important}}