:root{--ink:#172b38;--muted:#62737d;--teal:#007f7a;--dark:#0b2730;--line:#e1e9e8;--pale:#f2f8f7}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,'Noto Sans JP','Hiragino Kaku Gothic ProN',Meiryo,sans-serif;color:var(--ink);background:#fff;line-height:1.7}a{color:inherit;text-decoration:none}.site-header{height:72px;padding:0 max(5%,calc((100% - 1160px)/2));display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid #edf1f1;background:white;position:sticky;top:0;z-index:10}.brand{font-size:19px;font-weight:850;letter-spacing:-.04em;white-space:nowrap}.brand-icon{color:var(--teal);font-size:25px;margin-right:5px}.brand small{font-size:9px;letter-spacing:.12em;background:#e0f5f1;color:#00796f;padding:4px 6px;border-radius:4px;vertical-align:middle;margin-left:6px}.site-header nav{display:flex;gap:27px;font-size:13px;font-weight:700}.site-header nav a:hover{color:var(--teal)}.hero{background:linear-gradient(120deg,#09242d 5%,#0c4047 68%,#0b5554);color:white;display:grid;grid-template-columns:1.25fr .75fr;min-height:520px;overflow:hidden}.hero-inner{max-width:760px;padding:95px 30px 68px max(9%,calc((100vw - 1160px)/2))}.eyebrow{color:#66d5c3;letter-spacing:.22em;font-size:11px;font-weight:800}.eyebrow.dark{color:var(--teal)}h1{font-size:clamp(38px,5vw,66px);line-height:1.28;letter-spacing:-.06em;margin:23px 0}h1 em{font-style:normal;color:#8ce2d2}.hero p{max-width:530px;font-size:15px;color:#c5d7d7}.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:31px}.btn{border-radius:8px;padding:12px 19px;font-size:13px;font-weight:800}.btn.primary{background:#8ee4d4;color:#083b3c}.btn.ghost{border:1px solid #72999a}.hero .note-on-dark{font-size:11px;color:#8eb2b3;margin-top:27px}.hero-art{display:flex;align-items:center;justify-content:center;padding:40px 40px 40px 0}.phone{width:250px;height:402px;border:9px solid #244d53;border-radius:35px;background:#f8fbfb;color:#20343b;padding:20px 19px;transform:rotate(7deg);box-shadow:20px 28px 70px #00181d80}.phone-top{width:64px;height:7px;border-radius:8px;background:#b9c9c9;margin:-10px auto 25px}.phone-label{font-size:10px;color:#678188;letter-spacing:.17em;font-weight:800;margin-bottom:18px}.signal{padding:15px;background:#e1f4ef;border:1px solid #c2e9df;border-radius:12px}.signal span{display:block;color:#007f7a;font-size:10px;font-weight:900}.signal strong{display:block;font-size:21px}.signal small{font-size:10px;color:#60757a}.signal.secondary{background:#eaf0f8;border-color:#d9e3ef}.plus{text-align:center;font-size:20px;color:#81a3a3;margin:9px}.phone-bottom{text-align:center;font-size:10px;margin-top:20px;color:#637a80}.stats{display:flex;justify-content:center;border-bottom:1px solid var(--line)}.stats>div{width:260px;text-align:center;padding:23px 12px;display:flex;flex-direction:column;border-right:1px solid var(--line)}.stats>div:last-child{border-right:0}.stats strong{font-size:25px;color:var(--teal)}.stats span{font-size:11px;color:var(--muted)}.section{padding:82px max(7%,calc((100% - 1100px)/2));scroll-margin-top:72px}.section.tinted{background:var(--pale)}h2{font-size:clamp(27px,3vw,38px);letter-spacing:-.05em;line-height:1.35;margin:10px 0 12px}.section>p,.section-heading p{color:var(--muted);font-size:14px;max-width:740px}.filter-row{display:flex;gap:16px;margin:28px 0 23px;flex-wrap:wrap}label{font-size:12px;font-weight:800;color:#526c72;display:flex;flex-direction:column;gap:7px}input,select{font:inherit;background:white;border:1px solid #cbdcda;border-radius:8px;padding:11px 13px;color:var(--ink);min-width:190px}input:focus,select:focus{outline:2px solid #80cfc2}.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.sim-card{border:1px solid var(--line);border-radius:13px;padding:22px;background:white;display:flex;flex-direction:column;min-height:235px;box-shadow:0 4px 16px #193e4207}.sim-card-top{display:flex;justify-content:space-between;align-items:center}.sim-dot{width:10px;height:10px;border-radius:50%;background:#00a491}.sim-dot.orange{background:#ef9b45}.data-state{font-size:10px;background:#f3f5f4;color:#72858b;padding:4px 8px;border-radius:30px}.sim-card h3{font-size:23px;letter-spacing:-.04em;margin:15px 0 2px}.sim-card p{font-size:12px;color:var(--muted);margin:0 0 13px}.tags{display:flex;gap:5px;flex-wrap:wrap}.tags span{font-size:10px;padding:3px 7px;background:#e9f6f3;color:#19776e;border-radius:4px}.sim-formats,.checkline{font-size:11px;color:#698088;margin:14px 0}.card-link{margin-top:auto;color:var(--teal);font-size:12px;font-weight:800;border-top:1px solid var(--line);padding-top:12px}.fineprint{font-size:11px!important;color:#809095!important;margin-top:18px}.builder{display:grid;grid-template-columns:.9fr 1.1fr;gap:20px;margin-top:28px}.builder-controls{background:white;border:1px solid var(--line);border-radius:13px;padding:25px;display:grid;gap:19px}.builder-controls select{width:100%}.result{background:var(--dark);border-radius:13px;color:white;padding:28px}.result-label{font-size:10px;letter-spacing:.2em;color:#79cfc1;font-weight:800}.result-names{font-size:25px;font-weight:850;letter-spacing:-.04em;margin-top:14px}.result-divider{height:1px;background:#426067;margin:20px 0}.result p{font-size:13px;color:#d0e1e0}.result-alert{margin-top:20px;background:#23474b;padding:12px;border-radius:7px;font-size:12px}.result-alert strong{display:block;color:#9be5d7}.tip{background:#f5f8f8;border-left:4px solid var(--teal);padding:16px 19px;margin-top:22px;font-size:12px;color:#4b6569}.guide-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:28px}.guide-card{background:white;border:1px solid var(--line);border-radius:12px;padding:23px}.guide-number{font-size:12px;color:var(--teal);font-weight:900}.guide-card h3{font-size:18px;margin:15px 0 7px}.guide-card p{font-size:12px;color:var(--muted)}.status{display:inline-block;font-size:10px;background:#edf2f1;color:#607777;border-radius:4px;padding:4px 8px}.about{max-width:1000px}.about p{max-width:650px}footer{padding:26px max(7%,calc((100% - 1100px)/2));display:flex;gap:20px;justify-content:space-between;align-items:center;background:#09252c;color:#d5e5e4;font-size:11px}footer strong{font-size:15px}@media(max-width:850px){.site-header{padding:0 5%;height:auto;min-height:65px;flex-wrap:wrap;gap:2px}.site-header nav{overflow-x:auto;width:100%;padding-bottom:10px;gap:18px;white-space:nowrap;font-size:11px}.hero{grid-template-columns:1fr}.hero-inner{padding:60px 7% 35px}.hero-art{padding:10px 0 45px}.phone{transform:rotate(4deg) scale(.85);margin:-20px}.section{padding:58px 6%}.card-grid,.guide-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.builder{grid-template-columns:1fr}}@media(max-width:520px){.card-grid,.guide-grid{grid-template-columns:1fr}.stats>div{padding:17px 7px}.stats strong{font-size:19px}.stats span{font-size:9px}.filter-row label{flex:1 1 100%}.filter-row input,.filter-row select{width:100%}footer{flex-direction:column;gap:8px}.hero{min-height:auto}.hero-art{display:none}}

/* v1.0 readability */
html{scroll-behavior:smooth} .guide-card .card-link{display:inline-block;margin-top:12px} :focus-visible{outline:3px solid #e58b3e;outline-offset:3px} .article-wrap{max-width:820px;margin:36px auto 80px;padding:0 20px;line-height:1.9}.article-wrap h1{font-size:clamp(28px,5vw,42px);line-height:1.35}.article-wrap h2{font-size:24px;margin-top:42px}.article-wrap p,.article-wrap li{font-size:17px}.article-wrap table{border-collapse:collapse;width:100%;font-size:15px}.article-wrap th,.article-wrap td{border:1px solid #d9e2e7;padding:10px;text-align:left}.article-wrap th{background:#edf4f6}.article-wrap .notice{background:#fff7e7;padding:16px;border-left:4px solid #e3a244;border-radius:4px}.article-wrap a{color:#0a6685} .article-wrap .back{display:inline-block;margin:20px 0}
