.bk{--bk-blue:var(--brand,#3159db);--bk-ink:var(--ink,#17233c);--bk-muted:#52617a;--bk-rule:#dce3f0;--bk-soft:#eef2ff;color:var(--bk-ink);background:#fff;font-family:"Plus Jakarta Sans","Noto Sans JP",sans-serif;font-size:15px;line-height:1.9}
.bk a{color:var(--bk-blue);text-underline-offset:4px}.bk h1,.bk h2,.bk h3{font-family:"Noto Serif JP",serif;color:var(--bk-ink);font-weight:500;letter-spacing:.025em}.bk figure{margin:0}.bk img{display:block;max-width:100%}.bk p{margin:0 0 1em}.bk small{font-size:12px;line-height:1.8}.bk em{font-style:normal}.bk button,.bk input,.bk select{font:inherit}.bk button{cursor:pointer}.bk :where(a,button,input,select,summary):focus-visible{outline:3px solid #6d86f2;outline-offset:4px}.bk-nav{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:25px 0;border-bottom:1px solid var(--bk-rule);font-size:13px}.bk-nav a{text-decoration:none}.bk-nav__brand{font-weight:700;letter-spacing:.04em}.bk-nav>div{display:flex;align-items:center;gap:28px}.bk-nav__history{border:1px solid var(--bk-blue);padding:8px 18px;border-radius:2px}.bk-preview{background:var(--bk-soft);border-left:3px solid var(--bk-blue);padding:10px 18px;font-size:13px;margin:20px 0!important}
.bk-hero{display:grid;grid-template-columns:.86fr 1.14fr;align-items:center;gap:38px;padding:48px 0 30px}.bk-hero h1{font-size:clamp(35px,4.2vw,61px);line-height:1.52;margin:0 0 22px;letter-spacing:.02em}.bk-hero h1 em{color:var(--bk-blue)}.bk-hero__copy>p{font-size:17px;line-height:2}.bk-hero__copy>small{display:block;margin-top:13px;color:var(--bk-muted)}.bk .bk-button{display:inline-flex;justify-content:center;align-items:center;gap:14px;border-radius:2px;padding:15px 22px;font-size:14px;line-height:1.65;min-height:48px;font-weight:600;text-decoration:none}.bk .button-primary{background:#3159db;color:#fff;border:1px solid #3159db;box-shadow:none}.bk .button-primary:hover{background:#284bc0}.bk .button-secondary{background:#fff;color:#2340a4;border:1px solid #3159db;box-shadow:none}.bk .button-secondary:hover{background:#eef2ff}.bk-hero__media img{width:100%;height:auto;aspect-ratio:1.3;object-fit:cover}.bk-hero__media figcaption{font-size:10px;color:var(--bk-muted);padding-top:8px}.bk-hero__empty{min-height:380px;display:flex;flex-direction:column;justify-content:center;padding:48px;background:var(--bk-soft)}.bk-hero__empty span{font:30px/1.8 "Noto Serif JP",serif}.bk-assurance{display:grid;grid-template-columns:repeat(3,1fr);border-block:1px solid #c5d2ff;padding:20px 0;gap:20px}.bk-assurance span{display:flex;gap:12px;align-items:center;justify-content:center;font-size:13px;font-weight:500}.bk-assurance span+span{border-left:1px solid #c5d2ff}
.bk-collection{padding:72px 0 40px;scroll-margin-top:110px}.bk-section-heading{margin-bottom:30px}.bk-section-heading h2{font-size:clamp(24px,2.8vw,36px);line-height:1.7;margin:0 0 10px}.bk-section-heading p{color:var(--bk-muted);font-size:14px;line-height:1.9}.bk-categories{display:flex;flex-wrap:wrap;gap:9px;margin:0 0 24px}.bk-categories a{border:1px solid #c5d2ff;padding:9px 15px;text-decoration:none;font-size:12px;border-radius:2px;white-space:nowrap}.bk-categories a[aria-current=page]{background:#3159db;border-color:#3159db;color:white}.bk-search{display:grid;grid-template-columns:minmax(200px,1.7fr) 1fr 1fr auto;align-items:end;gap:14px;padding:21px 0;border-top:1px solid var(--bk-rule);border-bottom:1px solid var(--bk-rule)}.bk-search label{display:block;font-size:12px;margin-bottom:5px;color:var(--bk-muted)}.bk-search input,.bk-search select{width:100%;background:#fff;color:var(--bk-ink);border:1px solid #bdc9df;border-radius:2px;padding:11px 12px;min-height:47px;font-size:13px}.bk-search>a{grid-column:1/-1;justify-self:end;font-size:12px}.bk-result-count{font-size:12px;color:var(--bk-muted);margin:18px 0!important}.bk-products{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:44px 28px}.bk-product{min-width:0}.bk-product__image{position:relative;display:block;overflow:hidden;text-decoration:none!important;background:#eef2ff}.bk-product__image>img{aspect-ratio:1.5;object-fit:cover;width:100%;height:auto;transition:transform .35s ease}.bk-product__image:hover>img{transform:scale(1.025)}.bk-product__info{padding:22px 0 0}.bk-product__category{font-size:11px;color:var(--bk-muted);letter-spacing:.06em;margin:0 0 10px!important}.bk-product h3{font-size:25px;margin:0 0 10px}.bk-product h3 a{color:var(--bk-ink);text-decoration:none}.bk-product__info>p:not(.bk-product__category){font-size:14px;line-height:1.95;max-width:38em;color:var(--bk-muted)}.bk-product__price{display:flex;gap:25px;align-items:center;border-top:1px solid #c5d2ff;margin:21px 0 14px;padding-top:17px}.bk-product__price>span{font-size:12px;white-space:nowrap;padding-right:25px;border-right:1px solid #c5d2ff}.bk-product__price>div>small{display:block}.bk-product__price strong{font-family:"Noto Serif JP",serif;font-size:25px;font-weight:500}.bk-product__price strong small{font:12px sans-serif;margin-left:5px}.bk-product__price p{font-size:11px;margin:2px 0 0}.bk-text-link{display:inline-flex;gap:14px;align-items:center;font-size:13px;font-weight:600;text-decoration:none}.bk-reserved{position:absolute;inset:16px auto auto 16px;padding:7px 13px;background:#fff;color:#16285f;border:1px solid #c5d2ff;font-size:12px}.bk-sold{display:flex;flex-direction:column;align-items:center;justify-content:center;aspect-ratio:1.5;background:linear-gradient(135deg,#16285f,#2340a4);color:#fff;padding:34px;text-align:center}.bk-sold span{font:500 36px/1.6 "Noto Serif JP",serif;letter-spacing:.16em}.bk-sold small{color:#e4ebff;margin-top:12px}.bk-sold--large{aspect-ratio:1.3}.bk-sold--large span{font-size:clamp(36px,4vw,58px)}.bk-sold--large p{font-size:13px;color:#e4ebff;margin-top:20px}.bk-empty{grid-column:1/-1;text-align:center;padding:65px 20px;border-block:1px solid var(--bk-rule)}.bk-empty h3{font-size:20px}
.bk-process{padding:60px 0 40px;scroll-margin-top:110px}.bk-process ol{display:grid;grid-template-columns:repeat(3,1fr);padding:0;margin:0;list-style:none}.bk-process li{padding:0 30px 0 0}.bk-process li+li{padding-left:30px;border-left:1px solid var(--bk-rule)}.bk-process li>span{color:#3159db;font-size:14px;font-weight:700}.bk-process h3{font-size:20px;margin:12px 0 10px}.bk-process p{font-size:13px;line-height:1.9;color:var(--bk-muted)}.bk-faq{padding:42px 0;scroll-margin-top:110px}.bk-faq details{border-top:1px solid var(--bk-rule)}.bk-faq details:last-of-type{border-bottom:1px solid var(--bk-rule)}.bk-faq summary{padding:20px 35px 20px 2px;cursor:pointer;font-weight:500;font-size:14px}.bk-faq details p{padding:0 0 20px;font-size:13px;line-height:2;color:var(--bk-muted);max-width:900px;margin:0}.bk-faq>p{margin:17px 0 0}.bk-final{display:flex;align-items:center;justify-content:space-between;gap:25px;background:#eef2ff;padding:38px;margin:10px 0 55px}.bk-final h2{font-size:26px;margin:0}.bk-breadcrumb{display:flex;flex-wrap:wrap;gap:12px;font-size:11px;margin:25px 0;color:var(--bk-muted)}.bk-breadcrumb a{text-decoration:none}
.bk-detail-hero{display:grid;grid-template-columns:1.18fr 1fr;gap:38px;align-items:start;padding-bottom:50px}.bk-detail-media figure>img{width:100%;height:auto;aspect-ratio:1.3;object-fit:cover}.bk-detail-media figcaption{font-size:10px;color:var(--bk-muted);line-height:1.8;margin-top:10px}.bk-detail-summary h1{font-size:clamp(32px,3.7vw,48px);margin:8px 0 18px;line-height:1.5}.bk-detail-lead{font-size:15px;color:var(--bk-muted);line-height:2}.bk-plan{padding:20px 0;border-bottom:1px solid var(--bk-rule);display:grid;grid-template-columns:1fr auto;column-gap:12px;align-items:center}.bk-plan--full{border-top:1px solid #9fb3ff}.bk-plan h2{font:600 16px/1.6 "Noto Sans JP",sans-serif;margin:0 0 2px}.bk-plan p{font-size:11px;color:var(--bk-muted);margin:0}.bk-plan>strong{font:500 29px/1.5 "Noto Serif JP",serif;white-space:nowrap}.bk-plan>strong small{font:11px sans-serif;margin-left:4px}.bk-plan .bk-button{grid-column:1/-1;width:100%;margin-top:16px}.bk-plan-note{font-size:11px;color:var(--bk-muted);margin:16px 0!important;line-height:1.9}.bk-buy-state{grid-column:1/-1;padding:12px;margin-top:14px;background:#eef2ff;text-align:center;font-size:13px}.bk-detail-links{display:flex;flex-wrap:wrap;gap:16px;font-size:11px}.bk-ended{padding:20px 0;margin:20px 0;border-block:1px solid #c5d2ff}.bk-ended strong{font-family:"Noto Serif JP",serif;font-size:28px}.bk-ended p{font-size:13px;margin:8px 0 0}.bk-story{display:grid;grid-template-columns:.8fr 1.2fr;gap:70px;border-block:1px solid var(--bk-rule);padding:45px 0;margin-bottom:55px}.bk-story h2{font-size:30px;line-height:1.8;margin:0}.bk-story p{font-size:14px;line-height:2.2}.bk .bk-caption{font-size:11px;color:var(--bk-muted)}.bk-table-wrap{overflow-x:auto;margin:25px 0 40px}.bk table{width:100%;border-collapse:collapse;font-size:13px;line-height:1.9;text-align:left}.bk caption{text-align:left;font-weight:600;margin-bottom:14px}.bk th,.bk td{border:1px solid var(--bk-rule);padding:15px 18px;min-width:150px}.bk thead{background:#eef2ff}.bk tbody th{font-weight:500}.bk-assets{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:27px 20px}.bk-assets figure{min-width:0}.bk-assets img{width:100%;height:auto;aspect-ratio:10/7;object-fit:contain;background:#f4f6fa;border:1px solid var(--bk-rule)}.bk-assets figcaption{display:flex;flex-direction:column;gap:1px;padding:10px 0}.bk-assets figcaption span{font-size:13px;font-weight:500}.bk-assets figcaption small{font-size:10px;color:var(--bk-muted)}.bk-scope{margin:40px 0;border-left:3px solid #9fb3ff;padding:4px 0 4px 22px}.bk-scope h3{font-size:17px;margin:0 0 8px}.bk-scope p{font-size:12px;color:var(--bk-muted);line-height:2;margin:0}
.bk-checkout,.bk-terms{max-width:820px;margin:44px auto 70px}.bk-checkout>h1,.bk-terms>h1,.bk-purchases>h1{font-size:32px;margin:20px 0}.bk-checkout>p,.bk-terms>p{font-size:14px;line-height:2}.bk-order-summary{display:grid;grid-template-columns:190px 1fr;border-top:1px solid var(--bk-rule);margin:30px 0}.bk-order-summary dt,.bk-order-summary dd{border-bottom:1px solid var(--bk-rule);padding:17px 10px;font-size:13px;margin:0}.bk-order-summary dt{color:var(--bk-muted)}.bk-order-summary .bk-total{font-weight:700;font-size:22px}.bk-check{display:flex;align-items:start;gap:12px;font-size:13px;margin:25px 0}.bk-check input{width:19px;height:19px;margin-top:4px;accent-color:#3159db;flex-shrink:0}.bk-checkout form>small{display:block;color:var(--bk-muted);margin-top:14px}.bk-order-state{border-block:1px solid #c5d2ff;padding:30px 0;margin:30px 0}.bk-order-state h2{font-size:24px;margin:0 0 14px}.bk-order-state p{font-size:14px;line-height:2}.bk-order-state form{margin:16px 0}.bk-terms h2{font-size:22px;margin:34px 0 12px}.bk-purchases{padding:32px 0 70px}.bk-order-row{display:flex;justify-content:space-between;gap:30px;padding:25px 0;border-top:1px solid var(--bk-rule)}.bk-order-row h2{font-size:23px;margin:0 0 8px}.bk-order-row p{font-size:13px;margin:0 0 8px}.bk-order-row small{color:var(--bk-muted)}.bk-admin-product{padding:24px 0;border-bottom:1px solid var(--bk-rule)}.bk-admin-product form{display:grid;gap:14px;max-width:850px;margin-top:20px}.bk-admin-product label{font-size:13px;line-height:1.8}.bk-admin-product input[type=number],.bk-admin-product select{display:block;padding:10px;width:260px;border:1px solid #bdc9df;background:white;color:#17233c}.bk-admin-product input[type=checkbox]{margin-right:8px}.bk-admin-product button{justify-self:start}
@media(min-width:1200px){.bk-products:has(>.bk-product:only-child) .bk-product{grid-column:1/-1;display:grid;grid-template-columns:1.2fr 1fr;gap:38px;align-items:center}.bk-products:has(>.bk-product:only-child) .bk-product__info{padding:0 20px 0 0}.bk-products:has(>.bk-product:only-child) h3{font-size:34px}}
@media(max-width:1000px){.bk-hero{gap:22px}.bk-hero h1{font-size:42px}.bk-hero__copy>p{font-size:15px}.bk-search{grid-template-columns:1.5fr 1fr}.bk-search>button{width:100%}.bk-assurance span{font-size:11px;gap:8px}.bk-detail-hero{grid-template-columns:1.1fr 1fr;gap:25px}.bk-plan{grid-template-columns:1fr}.bk-plan>strong{margin-top:7px}.bk-assets{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:700px){.bk-nav{align-items:start;padding:19px 0;gap:14px}.bk-nav>div{gap:14px;flex-wrap:wrap;justify-content:end;font-size:11px}.bk-nav__brand{max-width:125px;font-size:12px}.bk-nav__history{padding:5px 10px}.bk-nav>div>a:first-child{display:none}.bk-hero{grid-template-columns:1fr;padding:30px 0 22px;gap:26px}.bk-hero h1{font-size:39px;line-height:1.5}.bk-hero__copy>p{font-size:15px;margin-bottom:20px}.bk-hero__media img{aspect-ratio:1.5}.bk-hero__copy>small{font-size:11px}.bk-assurance{grid-template-columns:1fr;gap:13px;padding:20px 0}.bk-assurance span{justify-content:start;font-size:12px}.bk-assurance span+span{border-left:0}.bk-collection{padding-top:42px}.bk-section-heading h2{font-size:25px}.bk-section-heading p{font-size:12px}.bk-categories{gap:7px}.bk-categories a{font-size:11px;padding:7px 10px}.bk-search{grid-template-columns:1fr 1fr;gap:12px}.bk-search>div:first-child{grid-column:1/-1}.bk-search>button{grid-column:1/-1}.bk-search input,.bk-search select{font-size:16px}.bk-search label{font-size:11px}.bk-products{grid-template-columns:1fr;gap:38px}.bk-product__price{gap:18px}.bk-product__price>span{padding-right:18px;font-size:11px}.bk-process{padding:30px 0 15px}.bk-process ol{grid-template-columns:1fr}.bk-process li,.bk-process li+li{padding:22px 0;border-left:0;border-top:1px solid var(--bk-rule)}.bk-process h3{margin:3px 0 9px}.bk-faq{padding:25px 0}.bk-faq summary{font-size:13px}.bk-final{flex-direction:column;align-items:start;padding:26px;margin-bottom:35px}.bk-final h2{font-size:22px}.bk-detail-hero{grid-template-columns:1fr;gap:22px}.bk-detail-summary h1{font-size:37px}.bk-plan{grid-template-columns:1fr auto}.bk-detail-media figure>img{aspect-ratio:1.5}.bk-story{grid-template-columns:1fr;gap:22px;padding:30px 0;margin-bottom:35px}.bk-story h2{font-size:26px}.bk-story h2 br{display:none}.bk-story p{font-size:13px}.bk-assets{gap:18px 12px}.bk-assets figcaption span{font-size:11px}.bk-assets figcaption small{font-size:9px}.bk table{font-size:11px}.bk th,.bk td{padding:12px;min-width:140px}.bk-checkout>h1,.bk-terms>h1{font-size:27px}.bk-order-summary{grid-template-columns:1fr}.bk-order-summary dt{border-bottom:0;padding:14px 0 2px}.bk-order-summary dd{padding:0 0 14px}.bk-checkout .bk-button{width:100%}.bk-order-row{flex-direction:column;gap:15px}.bk-breadcrumb{font-size:10px;gap:7px}.bk-sold--large{aspect-ratio:1.5}}
@media(prefers-reduced-motion:reduce){.bk *{scroll-behavior:auto!important;transition:none!important;animation:none!important}}
.bk-support-scope{margin:70px 0;padding:48px;background:#f3f6ff;border-left:3px solid #3159db}
.bk-support-scope h2{max-width:30em;margin:12px 0 22px;font-family:"Noto Serif JP",serif;font-size:clamp(25px,3vw,36px);line-height:1.6;font-weight:500}
.bk-support-scope p{max-width:62em;line-height:1.95}.bk-support-scope small{display:block;color:#536079;line-height:1.9;max-width:72em}
.bk-purchase-support{margin:50px 0;padding-top:36px;border-top:1px solid #dbe2ef}
.bk-purchase-support h2{font-family:"Noto Serif JP",serif;font-size:26px;line-height:1.6}
.bk-support-messages{margin:28px 0}.bk-support-message{margin:18px 0;padding:22px;background:#f6f7fa;border-left:2px solid #cbd3e2}
.bk-support-message--operator{background:#f1f5ff;border-left-color:#3159db}
.bk-message-meta{display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px;color:#536079;font-size:13px}
.bk-message-body{white-space:pre-wrap;overflow-wrap:anywhere;line-height:1.95}
.bk textarea{display:block;width:100%;padding:16px;border:1px solid #abb7ce;border-radius:2px;background:#fff;font:inherit;line-height:1.8;resize:vertical}
.bk textarea:focus{outline:2px solid #3159db;outline-offset:2px}
.bk{min-width:0;max-width:100%;width:100%}
.bk-detail-media,.bk-detail-summary,.bk-hero>*,.bk-story>*{min-width:0}
@media(max-width:700px){.bk-nav{flex-wrap:wrap;gap:12px}.bk-nav>div{flex-wrap:wrap;gap:16px}.bk-nav__history{padding:7px 12px}.bk-plan-note,.bk-message-body{overflow-wrap:anywhere}}
.bk-purchase-support form label{display:block;margin:22px 0 10px;font-weight:600}
.bk-purchase-support form small{display:block;line-height:1.8;color:#536079;margin:12px 0 18px}
@media(max-width:700px){.bk-support-scope{margin:44px 0;padding:28px 22px}.bk-support-message{padding:18px}.bk-purchase-support h2{font-size:23px}}

.bk-light-preview{display:grid;grid-template-columns:minmax(0,1fr) minmax(220px,.7fr);gap:32px;align-items:center;margin:48px 0;padding:24px;border:1px solid #dde4ef;background:#fff}.bk-light-preview img{display:block;width:100%;height:auto}.bk-light-preview figcaption{display:grid;gap:14px;color:#52617b}.bk-light-preview strong{font-size:22px;color:#17233c}.bk-light-preview span{line-height:1.9}@media(min-width:1100px){.bk-products{grid-template-columns:repeat(3,minmax(0,1fr))}}@media(max-width:700px){.bk-light-preview{grid-template-columns:minmax(0,1fr);gap:20px;padding:16px}}

.bk-plan h2 span{display:block;font-size:13px;font-family:inherit;font-weight:400;line-height:1.7;margin-top:3px}.bk-plan p{max-width:36em}.bk-file-guide{margin:48px 0 60px}.bk-tier-contents{display:grid;grid-template-columns:minmax(0,.8fr) minmax(0,1.2fr);gap:24px}.bk-tier-contents article{padding:28px;border:1px solid #dce4f1}.bk-tier-contents article+article{border-top:3px solid #3159db}.bk-tier-contents h3{font-size:24px;margin:4px 0 16px}.bk-tier-contents p,.bk-tier-contents li{font-size:14px;line-height:1.9}.bk-tier-contents ul{padding-left:20px;margin:22px 0 0}.bk-tier-contents li+li{margin-top:9px}.bk-editing-explanation{padding:28px;background:#f4f7ff;margin:28px 0}.bk-editing-explanation h3{font-size:20px}.bk-editing-explanation p{font-size:14px;line-height:1.95}.bk-format-details{border-block:1px solid #dce4f1;padding:22px 0}.bk-format-details summary{cursor:pointer;font-size:17px;font-weight:600}.bk-format-cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;padding-top:24px}.bk-format-cards article{padding:24px;border:1px solid #dce4f1}.bk-format-cards h3{font-size:18px;margin:10px 0}.bk-format-cards small{font-size:11px;color:#52617b}.bk-format-cards p,.bk-format-cards dl{font-size:13px;line-height:1.9}.bk-format-cards dt{font-weight:600;margin-top:12px}.bk-format-cards dd{margin:0}.bk-web-explanation{display:grid;grid-template-columns:1fr 1fr;gap:36px;padding:30px 0}.bk-web-explanation h3{font-size:19px}.bk-web-explanation p{font-size:13px;line-height:2}@media(max-width:700px){.bk-tier-contents,.bk-format-cards,.bk-web-explanation{grid-template-columns:minmax(0,1fr)}.bk-tier-contents article{padding:22px}.bk-tier-contents h3{font-size:22px}.bk-editing-explanation{padding:22px}.bk-file-guide .bk-section-heading p{font-size:13px;line-height:1.9}}

.bk-rights{padding:clamp(40px,6vw,72px) 0;border-top:1px solid var(--bk-line,#dce4f1)}.bk-rights__grid{display:grid;grid-template-columns:1.35fr 1fr;gap:clamp(24px,5vw,64px)}.bk-rights h3{font-size:20px;line-height:1.7;margin:24px 0 12px}.bk-rights li{margin:12px 0;line-height:1.95}.bk-rights p{line-height:1.95}.bk-rights__grid ul{padding-left:1.35em}@media(max-width:760px){.bk-rights__grid{grid-template-columns:1fr}}