:root{--bg:#F5F7F8;--paper:#fff;--soft:#EDEFF1;--blue-soft:#E8EEF2;--warm:#F3E9DF;--navy:#183247;--navy-deep:#102536;--bluegray:#496779;--teal:#3F746F;--copper:#B9653B;--title:#1E2A32;--text:#38454D;--muted:#65727A;--border:#D6DDE1;--footer:#132A3A;--footertext:#F3F6F7;--max:1200px;--content:1000px;--reading:760px}
*,*::before,*::after{box-sizing:border-box}html{background:var(--bg)}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;color:var(--text);background:var(--bg);font-size:16px;line-height:1.82}img{display:block;max-width:100%;height:auto;object-fit:contain}a{color:var(--bluegray);text-decoration-thickness:1px;text-underline-offset:3px;overflow-wrap:anywhere}a:hover,a:focus-visible{color:var(--copper);text-decoration-thickness:2px}button,a{min-width:0}button:focus-visible,a:focus-visible{outline:3px solid rgba(185,101,59,.35);outline-offset:3px}h1,h2,h3{color:var(--title);margin:0 0 .55em;overflow-wrap:anywhere}h1{font-size:36px;line-height:1.25}h2{font-size:26px;line-height:1.35}h3{font-size:20px;line-height:1.45}p{margin:0 0 1.15em}.site-header{background:var(--paper);border-bottom:1px solid var(--border)}.header-inner{max-width:var(--max);margin:auto;padding:0 34px;height:70px;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--title);min-width:0}.brand-logo{height:32px;width:auto;max-width:170px}.brand-mark{font-weight:800;white-space:nowrap}.brand-copy{display:flex;flex-direction:column;line-height:1.15}.brand-copy strong{font-size:16px}.brand-copy small{font-size:10px;letter-spacing:.08em;color:var(--muted);margin-top:4px}.desktop-nav{display:flex;align-items:center;gap:17px;min-width:0}.desktop-nav a{font-size:15px;text-decoration:none;color:var(--text);white-space:nowrap}.desktop-nav a.is-active{color:var(--copper);font-weight:700}.menu-toggle,.mobile-menu-toggle,.menu-close{border:1px solid var(--border);background:#fff;color:var(--title);border-radius:8px;padding:10px 13px;min-height:44px;font:inherit;cursor:pointer}.mobile-menu-toggle{display:none}.category-panel{background:var(--blue-soft);border-top:1px solid var(--border)}.category-panel[hidden]{display:none}.category-inner{max-width:var(--max);margin:auto;padding:24px 34px 20px}.category-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}.category-groups{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:30px}.category-groups section{min-width:0}.category-groups h2{font-size:16px;margin-bottom:10px}.category-groups a{display:block;color:var(--text);text-decoration:none;padding:6px 0}.category-groups small{color:var(--muted);margin-left:6px}.service-links{display:flex;flex-wrap:wrap;gap:8px 16px;border-top:1px solid var(--border);margin-top:18px;padding-top:14px}.service-links a{font-size:14px}.container,.page-wrap{width:100%;max-width:var(--max);margin:auto;padding-left:34px;padding-right:34px}.content-width{max-width:var(--content);margin:auto}.reading-width{max-width:var(--reading);margin:auto}.page-intro{max-width:var(--content);margin:0 auto;padding:42px 0 24px}.breadcrumbs{font-size:14px;color:var(--muted);margin-bottom:12px}.lead{font-size:17px;color:#4a5962;max-width:780px}.tag{display:inline-block;font-size:13px;color:var(--teal);border-bottom:2px solid var(--teal);margin-top:8px}.section{padding:58px 0}.section + .section{border-top:1px solid rgba(214,221,225,.72)}.soft-section{background:var(--soft)}.blue-section{background:var(--blue-soft)}.warm-section{background:var(--warm)}.dark-section{background:var(--navy);color:#eef3f4;border-radius:14px;padding:30px}.dark-section h2,.dark-section h3{color:#fff}.dark-section a{color:#f2d8ca}.two-col{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:34px;align-items:start}.asym{display:grid;grid-template-columns:minmax(0,.72fr) minmax(0,1.28fr);gap:40px;align-items:start}.image-text{display:grid;grid-template-columns:minmax(0,.85fr) minmax(0,1.15fr);gap:34px;align-items:center}.intro-grid{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(280px,.75fr);gap:42px;align-items:center}.opening-image{max-width:390px;max-height:280px;margin-left:auto}.content-image{max-height:280px;margin:24px auto}.feature-image{max-width:520px;max-height:310px}.device-image{max-width:250px;max-height:390px;margin:auto}.button-row{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px}.text-button{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:9px 15px;border-radius:8px;background:var(--navy);color:#fff;text-decoration:none}.text-button.alt{background:transparent;color:var(--navy);border:1px solid var(--navy)}.number-line{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:0;border-top:1px solid var(--border);border-bottom:1px solid var(--border)}.number-line article{padding:18px 18px 18px 0;min-width:0}.number-line article+article{border-left:1px solid var(--border);padding-left:18px}.num{color:var(--copper);font-weight:800;font-size:13px;letter-spacing:.08em}.compact-list{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:0 24px}.compact-list article{padding:15px 0;border-top:1px solid var(--border);min-width:0}.track{border-left:2px solid var(--teal);padding-left:20px}.track div{padding:8px 0}.analysis-list{border-top:1px solid var(--border)}.analysis-list article{display:grid;grid-template-columns:130px minmax(0,1fr);gap:20px;padding:18px 0;border-bottom:1px solid var(--border)}.path-steps{counter-reset:step}.path-step{display:grid;grid-template-columns:72px minmax(0,1fr);gap:22px;padding:26px 0;border-top:1px solid var(--border);min-width:0}.path-step::before{counter-increment:step;content:counter(step,decimal-leading-zero);color:var(--copper);font-weight:800}.side-note-layout{display:grid;grid-template-columns:minmax(0,1fr) 190px;gap:34px}.side-notes{font-size:14px;color:var(--muted);border-left:2px solid var(--teal);padding-left:16px}.article-block{max-width:var(--reading);margin:0 auto 42px}.article-block + .article-block{padding-top:34px;border-top:1px solid var(--border)}.article-block ul,.article-block ol{padding-left:1.3em}.timeline{border-left:2px solid var(--copper);padding-left:24px}.timeline article{padding:0 0 24px}.quote-note{border-left:4px solid var(--teal);padding:10px 0 10px 18px;color:#4e5c65}.faq-item{padding:0 0 24px;margin-bottom:24px;border-bottom:1px solid var(--border)}.faq-item h2{font-size:21px}.directory-group{padding:20px 0;border-top:1px solid var(--border)}.directory-group a{display:inline-block;margin:4px 16px 4px 0}.site-footer{background:var(--footer);color:var(--footertext);padding:46px 0 82px}.footer-grid{max-width:var(--max);margin:auto;padding:0 34px;display:grid;grid-template-columns:1.35fr 1fr 1fr 1fr;gap:32px}.site-footer h2{font-size:16px;color:#fff}.site-footer a{display:block;color:#eef3f4;margin:6px 0}.site-footer p{color:#d8e0e3;font-size:14px}.footer-en{display:block;color:#b9c8cf;margin:4px 0 10px}.mobile-bottom-nav{display:none}
@media(max-width:1024px){.header-inner,.container,.page-wrap,.category-inner,.footer-grid{padding-left:24px;padding-right:24px}.desktop-nav{gap:11px}.desktop-nav a{font-size:14px}.intro-grid{grid-template-columns:minmax(0,1fr) minmax(240px,.65fr)}h1{font-size:32px}h2{font-size:24px}h3{font-size:19px}.number-line{grid-template-columns:repeat(3,minmax(0,1fr))}.number-line article:nth-child(4){border-left:0}.compact-list{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:767px){body{padding-bottom:calc(58px + env(safe-area-inset-bottom));font-size:16px;line-height:1.8}.header-inner{height:60px;padding-left:16px;padding-right:16px}.brand-logo{height:27px;max-width:120px}.brand-copy small{display:none}.brand-copy strong{font-size:15px}.desktop-nav{display:none}.mobile-menu-toggle{display:inline-flex;align-items:center}.category-inner{padding:18px 16px}.category-groups{grid-template-columns:minmax(0,1fr);gap:18px}.category-groups section{border-top:1px solid var(--border);padding-top:10px}.service-links{display:grid;grid-template-columns:minmax(0,1fr);gap:2px}.container,.page-wrap{padding-left:16px;padding-right:16px}.page-intro{padding:32px 0 20px}.section{padding:40px 0}h1{font-size:28px;line-height:1.35}h2{font-size:22px;line-height:1.4}h3{font-size:18px;line-height:1.5}.lead{font-size:16px}.two-col,.asym,.image-text,.intro-grid,.side-note-layout{grid-template-columns:minmax(0,1fr);gap:24px}.opening-image{margin:20px auto 0;max-width:100%;max-height:210px}.content-image,.feature-image{max-width:100%;max-height:210px}.device-image{max-width:190px;max-height:300px}.number-line{display:block}.number-line article,.number-line article+article{border-left:0;padding:16px 0;border-bottom:1px solid var(--border)}.number-line article:last-child{border-bottom:0}.compact-list{grid-template-columns:minmax(0,1fr)}.analysis-list article{grid-template-columns:minmax(0,1fr);gap:4px}.path-step{grid-template-columns:minmax(0,1fr);gap:6px}.path-step::before{display:inline-block}.side-notes{border-left:0;border-top:2px solid var(--teal);padding:14px 0 0}.dark-section{padding:22px 18px}.footer-grid{grid-template-columns:minmax(0,1fr);padding-left:16px;padding-right:16px}.site-footer{padding-bottom:96px}.mobile-bottom-nav{position:fixed;left:0;right:0;bottom:0;display:grid;grid-template-columns:repeat(5,minmax(0,1fr));height:calc(58px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);background:#fff;border-top:1px solid var(--border);z-index:20}.mobile-bottom-nav a{display:flex;align-items:center;justify-content:center;text-decoration:none;color:var(--text);font-size:12.5px;min-width:0}.mobile-bottom-nav a:focus-visible{outline-offset:-3px}.track{padding-left:16px}.timeline{padding-left:18px}.button-row{gap:9px}.text-button{flex:0 1 auto}}
@media(max-width:360px){.container,.page-wrap,.header-inner,.category-inner,.footer-grid{padding-left:14px;padding-right:14px}.brand-copy{display:none}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}