:root{--rra-bg:#f4efe6;--rra-surface:#fbf8f2;--rra-surface-strong:#eee5d8;--rra-text:#2d2925;--rra-text-secondary:#6c645c;--rra-text-soft:#8b8278;--rra-brand-red:#8b3433;--rra-brand-red-dark:#6f2928;--rra-bamboo:#68756c;--rra-gold:#aa8755;--rra-border:#d9d0c4;--rra-border-soft:#e7e0d6;--rra-radius-sm:10px;--rra-radius-md:18px;--rra-radius-lg:28px;--rra-shadow-soft:0 18px 50px rgba(54,43,32,.08);--rra-space-1:.25rem;--rra-space-2:.5rem;--rra-space-3:.75rem;--rra-space-4:1rem;--rra-space-5:1.5rem;--rra-space-6:2rem;--rra-space-7:3rem;--rra-space-8:4rem;--rra-space-9:6rem;--rra-space-10:8rem;--rra-container:1240px;--rra-reading:760px;--rra-page-gutter:clamp(1.25rem, 3vw, 2rem);--rra-section-space:clamp(3.5rem, 8vw, 8rem);--rra-font-sans:-apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;--rra-font-serif:ui-serif, "Songti SC", "STSong", "Noto Serif SC", serif;--rra-text-sm:.875rem;--rra-text-base:1rem;--rra-text-lead:clamp(1.125rem, 1.5vw, 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0}.rra-site-header__inner,.rra-site-footer__inner{justify-content:space-between;align-items:center;gap:var(--rra-space-4);min-height:72px;display:flex}.rra-site-header__brand{font-weight:700;text-decoration:none}.rra-site-header nav{align-items:center;min-height:44px;display:flex}.rra-eyebrow{color:var(--rra-brand-red);font-size:var(--rra-text-sm);letter-spacing:.12em;text-transform:uppercase;font-weight:700}.rra-lead{color:var(--rra-text-secondary);font-size:var(--rra-text-lead);line-height:1.8}.rra-button{border-radius:var(--rra-radius-sm);min-height:46px;transition:background-color var(--rra-duration-base) var(--rra-ease-out), border-color var(--rra-duration-base) var(--rra-ease-out), color var(--rra-duration-base) var(--rra-ease-out), transform var(--rra-duration-fast) var(--rra-ease-out);border:1px solid transparent;justify-content:center;align-items:center;padding:.625rem 1rem;font-weight:700;line-height:1.25;text-decoration:none;display:inline-flex}.rra-button:hover{transform:translateY(-1px)}.rra-button[aria-disabled=true]{cursor:default;pointer-events:none}.rra-button--primary{background:var(--rra-brand-red);color:var(--rra-surface)}.rra-button--primary:hover{background:var(--rra-brand-red-dark);color:var(--rra-surface)}.rra-button--secondary{border-color:var(--rra-border);color:var(--rra-text);background:0 0}.rra-button--secondary:hover{border-color:var(--rra-bamboo);background:var(--rra-surface);color:var(--rra-text)}.rra-visually-hidden{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}@media (max-width:767px){:root{--rra-page-gutter:1.25rem}.rra-button{min-height:44px}}@media 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(max-width:560px){.rra-site-header__inner{min-height:68px}.rra-site-footer__inner{grid-template-columns:1fr}.rra-site-footer__contact{grid-column:auto}.rra-site-footer__nav ul{grid-template-columns:repeat(2,minmax(0,1fr));gap:.5rem 1rem;display:grid}}.rra-corporate-page{overflow:hidden}.rra-page-section{padding-top:max(4.5rem,min(10vw,9rem));padding-bottom:max(4.5rem,min(10vw,9rem))}.rra-page-breadcrumbs{margin-bottom:max(2rem,min(5vw,4rem))}.rra-page-breadcrumbs nav ol{color:var(--rra-text-soft);font-size:var(--rra-text-sm);flex-wrap:wrap;gap:.45rem;margin:0;padding:0;list-style:none;display:flex}.rra-page-breadcrumbs li+li:before{color:var(--rra-gold);content:"／";margin-right:.45rem}.rra-corporate-hero{background:var(--rra-surface);padding-top:max(5rem,min(11vw,10rem));padding-bottom:max(5rem,min(11vw,10rem));position:relative;overflow:hidden}.rra-corporate-hero:after{aspect-ratio:1;content:"";border:1px solid 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p:last-child{color:var(--rra-text-secondary);font-size:var(--rra-text-lead)}.rra-method-statement__lines{padding:var(--rra-space-6);border-left:2px solid var(--rra-brand-red);background:#f0e8dc;gap:1rem;display:grid}.rra-method-statement__lines span{color:var(--rra-text-secondary);font-size:var(--rra-text-sm)}.rra-feature-band{background:#e8ddce}.rra-feature-band__grid{grid-template-columns:minmax(0,5fr) minmax(0,7fr);align-items:center;gap:max(3rem,min(9vw,10rem));display:grid}.rra-feature-band__visual{border:1px solid var(--rra-border);background:var(--rra-surface);place-items:center;min-height:28rem;display:grid;position:relative;overflow:hidden}.rra-feature-band__visual:before{aspect-ratio:1;content:"";border:1px solid rgba(139,52,51,.2);border-radius:50%;width:78%;position:absolute}.rra-feature-band__visual img{z-index:1;object-fit:contain;width:min(80%,26rem);height:auto;position:relative}.rra-feature-band__visual.rra-products-product__visual{background:0 0;border-color:transparent;overflow:visible}.rra-feature-band__visual.rra-products-product__visual img{width:min(128%,34rem);max-width:none}.rra-feature-band__content{gap:var(--rra-space-5);max-width:40rem;display:grid}.rra-feature-band__content p{color:var(--rra-text-secondary)}.rra-link-list{border-top:1px solid var(--rra-border);gap:0;margin:0;padding:0;list-style:none;display:grid}.rra-link-list li{border-bottom:1px solid var(--rra-border)}.rra-link-list a{justify-content:space-between;align-items:center;gap:1rem;min-height:56px;text-decoration:none;display:flex}.rra-link-list a:after{color:var(--rra-brand-red);content:"→"}.rra-relationship{background:var(--rra-surface)}.rra-relationship__grid{grid-template-columns:minmax(0,4fr) minmax(0,8fr);align-items:start;gap:max(3rem,min(10vw,11rem));display:grid}.rra-relationship__copy{gap:var(--rra-space-4);display:grid}.rra-relationship__copy p:last-child{color:var(--rra-text-secondary)}.rra-relationship__chain{border-top:1px solid 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strong{color:var(--rra-brand-red)}.rra-knowledge-structure{background:var(--rra-text);color:var(--rra-surface)}.rra-knowledge-structure h2,.rra-knowledge-structure h3,.rra-knowledge-structure .rra-eyebrow{color:var(--rra-surface)}.rra-knowledge-structure__grid{grid-template-columns:minmax(0,4fr) minmax(0,8fr);gap:max(3rem,min(10vw,11rem));display:grid}.rra-knowledge-structure__intro{gap:var(--rra-space-5);display:grid}.rra-knowledge-structure__intro p:last-child{color:rgba(251,248,242,.68)}.rra-volume-grid{border-top:1px solid rgba(251,248,242,.25);grid-template-columns:repeat(4,minmax(0,1fr));margin:0;padding:0;list-style:none;display:grid}.rra-volume-grid li{min-height:8rem;padding:var(--rra-space-4);border-bottom:1px solid rgba(251,248,242,.18);border-right:1px solid rgba(251,248,242,.18);align-content:center;gap:.4rem;display:grid}.rra-volume-grid span{color:#ead29e;font-family:var(--rra-font-serif)}.rra-volume-grid small{color:rgba(251,248,242,.55)}.rra-empty-content{background:#faf6ef}.rra-empty-content__box{gap:var(--rra-space-6);border:1px solid var(--rra-border);grid-template-columns:minmax(0,1fr) minmax(16rem,1fr);padding:max(2rem,min(6vw,5rem));display:grid}.rra-empty-content__box p{color:var(--rra-text-secondary)}.rra-cooperation-flow{background:#faf6ef}.rra-cooperation-flow__heading{gap:var(--rra-space-4);max-width:42rem;display:grid}.rra-cooperation-flow__heading p:last-child{color:var(--rra-text-secondary);font-size:var(--rra-text-lead)}.rra-cooperation-flow__steps{grid-template-columns:repeat(4,minmax(0,1fr));margin:max(3rem,min(7vw,6rem)) 0 0;padding:0;list-style:none;display:grid}.rra-cooperation-flow__steps li{gap:var(--rra-space-4);min-height:13rem;padding:var(--rra-space-6);border-top:1px solid var(--rra-border);border-bottom:1px solid var(--rra-border);display:grid}.rra-cooperation-flow__steps li+li{border-left:1px solid var(--rra-border)}.rra-cooperation-flow__steps span{color:var(--rra-brand-red);font-family:var(--rra-font-serif)}.rra-cooperation-flow__steps p{color:var(--rra-text-secondary);font-size:var(--rra-text-sm)}.rra-contact-panel{background:#e8ddce}.rra-contact-panel__grid{grid-template-columns:minmax(0,5fr) minmax(16rem,5fr);align-items:start;gap:max(3rem,min(10vw,11rem));display:grid}.rra-contact-panel__copy{gap:var(--rra-space-5);display:grid}.rra-contact-panel__copy p:last-child{color:var(--rra-text-secondary);font-size:var(--rra-text-lead)}.rra-contact-list{border-top:1px solid var(--rra-border);margin:0;padding:0;list-style:none;display:grid}.rra-contact-list li{gap:var(--rra-space-5);border-bottom:1px solid var(--rra-border);grid-template-columns:minmax(8rem,1fr) minmax(0,2fr);padding:1.15rem 0;display:grid}.rra-contact-list span{color:var(--rra-text-soft)}.rra-contact-list strong,.rra-contact-list a{color:var(--rra-text);font-weight:700;text-decoration:none}.rra-contact-list small{color:var(--rra-text-soft);font-size:var(--rra-text-sm);font-weight:400;display:block}.rra-reading-path{border-top:1px solid var(--rra-border);grid-template-columns:repeat(3,minmax(0,1fr));display:grid}.rra-reading-path>div{min-height:10rem;padding:var(--rra-space-5);border-bottom:1px solid var(--rra-border);align-content:start;gap:.75rem;display:grid}.rra-reading-path>div+div{border-left:1px solid var(--rra-border)}.rra-reading-path span,.rra-reading-path-section span{color:var(--rra-brand-red);font-family:var(--rra-font-serif)}.rra-reading-path strong{font-family:var(--rra-font-serif);font-size:1.3rem}.rra-reading-path p{color:var(--rra-text-secondary);font-size:var(--rra-text-sm)}.rra-reading-path>a{min-height:4rem;color:var(--rra-text);border-bottom:1px solid var(--rra-border);grid-column:1/-1;justify-content:space-between;align-items:center;text-decoration:none;display:flex}.rra-reading-path>a:after,.rra-entity-intro a:after,.rra-contact-routes 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var(--rra-border);font-size:var(--rra-text-sm)}.rra-product-identity{background:var(--rra-surface)}.rra-product-identity__grid{grid-template-columns:minmax(0,4fr) minmax(0,8fr);align-items:start;gap:max(3rem,min(10vw,11rem));display:grid}.rra-product-identity__grid>div:first-child{gap:var(--rra-space-4);display:grid}.rra-product-identity dl{border-top:1px solid var(--rra-border);grid-template-columns:repeat(2,minmax(0,1fr));margin:0;padding:0;display:grid}.rra-product-identity dl>div{min-height:8.5rem;padding:var(--rra-space-5);border-bottom:1px solid var(--rra-border);align-content:center;gap:.45rem;display:grid}.rra-product-identity dl>div:nth-child(2n){border-left:1px solid var(--rra-border);background:#faf6ef}.rra-product-identity dt{color:var(--rra-text-soft);font-size:var(--rra-text-sm)}.rra-product-identity dd{font-family:var(--rra-font-serif);margin:0;font-size:1.25rem}.rra-product-identity a{color:var(--rra-brand-red);text-decoration:none}.rra-reading-principle{background:#e8ddce}.rra-reading-principle__grid{grid-template-columns:minmax(0,6fr) minmax(16rem,4fr);align-items:end;gap:max(3rem,min(10vw,11rem));display:grid}.rra-reading-principle__grid>div:first-child{gap:var(--rra-space-5);display:grid}.rra-reading-principle__quote{gap:var(--rra-space-4);padding:var(--rra-space-6);border-left:2px solid var(--rra-brand-red);background:var(--rra-surface);display:grid}.rra-reading-principle__quote p{font-family:var(--rra-font-serif);font-size:1.4rem;line-height:1.6}.rra-reading-principle__quote small{color:var(--rra-text-secondary);line-height:1.7}.rra-content-slots{background:#faf6ef}.rra-content-slots__grid{border:1px solid var(--rra-border);grid-template-columns:repeat(2,minmax(0,1fr));display:grid}.rra-content-slots article{gap:var(--rra-space-5);align-content:start;min-height:23rem;padding:max(2rem,min(5vw,4rem));display:grid}.rra-content-slots article+article{border-left:1px solid var(--rra-border);background:var(--rra-surface)}.rra-content-slots article p:last-of-type{color:var(--rra-text-secondary)}.rra-content-slots article>span{width:fit-content;color:var(--rra-text-secondary);border:1px solid var(--rra-border);font-size:var(--rra-text-sm);padding:.45rem .65rem}.rra-reading-path-section{background:var(--rra-surface)}.rra-reading-path-section__grid{grid-template-columns:minmax(0,4fr) minmax(0,8fr);align-items:start;gap:max(3rem,min(10vw,11rem));display:grid}.rra-reading-path-section__grid>div{gap:var(--rra-space-4);display:grid}.rra-reading-path-section ol{border-top:1px solid var(--rra-border);grid-template-columns:repeat(3,minmax(0,1fr));margin:0;padding:0;list-style:none;display:grid}.rra-reading-path-section li{gap:var(--rra-space-3);min-height:12rem;padding:var(--rra-space-5);border-bottom:1px solid var(--rra-border);display:grid}.rra-reading-path-section li+li{border-left:1px solid 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p{color:rgba(251,248,242,.68);font-size:var(--rra-text-sm)}.rra-contact-routes{background:#faf6ef}.rra-contact-routes__header{gap:var(--rra-space-4);max-width:42rem;display:grid}.rra-contact-routes__header p:last-child{color:var(--rra-text-secondary);font-size:var(--rra-text-lead)}.rra-contact-routes ol{border-top:1px solid var(--rra-border);grid-template-columns:repeat(3,minmax(0,1fr));margin:max(3rem,min(7vw,6rem)) 0 0;padding:0;list-style:none;display:grid}.rra-contact-routes li{align-content:start;gap:var(--rra-space-4);min-height:15rem;padding:var(--rra-space-5);border-bottom:1px solid var(--rra-border);display:grid}.rra-contact-routes li+li{border-left:1px solid var(--rra-border)}.rra-contact-routes span{color:var(--rra-brand-red);font-family:var(--rra-font-serif)}.rra-contact-routes p{color:var(--rra-text-secondary);font-size:var(--rra-text-sm)}.rra-contact-routes a{width:fit-content;color:var(--rra-text);font-size:var(--rra-text-sm);gap:.75rem;text-decoration:none;display:inline-flex}@media (max-width:900px){.rra-corporate-hero__grid,.rra-home-hero__grid,.rra-method-statement__grid,.rra-feature-band__grid,.rra-relationship__grid,.rra-knowledge-structure__grid,.rra-contact-panel__grid,.rra-entity-intro__grid,.rra-brand-focus__grid,.rra-product-identity__grid,.rra-reading-principle__grid,.rra-reading-path-section__grid,.rra-boundary-band__grid{grid-template-columns:1fr}.rra-corporate-hero__mark,.rra-home-hero__seal{min-height:12rem}.rra-home-directions__grid{grid-template-columns:1fr}.rra-method-statement__lines{max-width:38rem}.rra-relationship__chain{max-width:48rem}.rra-knowledge-structure__grid{gap:var(--rra-space-7)}.rra-entity-intro__grid>div:last-child{max-width:42rem}.rra-brand-focus__grid{max-width:48rem}.rra-brand-focus__mark{min-height:12rem}}@media (max-width:700px){.rra-home-directions__list,.rra-cooperation-flow__steps,.rra-signal-axis,.rra-support-axis ol,.rra-contact-routes ol{grid-template-columns:repeat(2,minmax(0,1fr))}.rra-home-directions__list li:nth-child(3),.rra-cooperation-flow__steps li:nth-child(3){border-top:1px solid rgba(251,248,242,.2);border-left:0}.rra-cooperation-flow__steps li:nth-child(3){border-top-color:var(--rra-border)}.rra-relationship__chain{grid-template-columns:1fr}.rra-relationship__chain li+li{border-top:1px solid var(--rra-border);border-left:0}.rra-relationship__chain li+li:before{top:-.55rem;left:0;transform:rotate(90deg)}.rra-volume-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.rra-reading-path{grid-template-columns:1fr}.rra-reading-path>div+div{border-top:1px solid var(--rra-border);border-left:0}.rra-reading-path>a{grid-column:auto}.rra-boundary-band ul,.rra-reading-path-section ol{grid-template-columns:1fr}.rra-boundary-band li+li,.rra-reading-path-section li+li{border-top:1px solid 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img{width:min(160%,38rem)}.rra-corporate-hero--contact .rra-corporate-hero__mark{min-height:9.75rem}.rra-home-directions__list,.rra-cooperation-flow__steps,.rra-signal-axis,.rra-support-axis ol,.rra-contact-routes ol{grid-template-columns:1fr}.rra-home-directions__list li,.rra-home-directions__list li:nth-child(3),.rra-cooperation-flow__steps li,.rra-cooperation-flow__steps li:nth-child(3),.rra-support-axis li,.rra-support-axis li:nth-child(3),.rra-contact-routes li,.rra-contact-routes li:nth-child(3){min-height:0;padding:var(--rra-space-5) 0;border-top:1px solid rgba(251,248,242,.2);border-left:0;border-right:0}.rra-cooperation-flow__steps li,.rra-cooperation-flow__steps li:nth-child(3),.rra-contact-routes li,.rra-contact-routes li:nth-child(3){border-top-color:var(--rra-border)}.rra-feature-band__visual{min-height:20rem}.rra-knowledge-structure__grid{gap:var(--rra-space-6)}.rra-volume-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.rra-volume-grid li:nth-child(2n){border-right:0}.rra-empty-content__box{grid-template-columns:1fr}.rra-contact-list li{grid-template-columns:1fr;gap:.35rem}.rra-signal-axis div{min-height:0;padding:var(--rra-space-5) 0}.rra-signal-axis div+div{border-top:1px solid var(--rra-border);border-left:0}.rra-product-identity dl{grid-template-columns:1fr}.rra-product-identity dl>div:nth-child(2n){border-top:1px solid var(--rra-border);border-left:0}.rra-content-slots article{min-height:0}}