*{box-sizing:border-box} body{margin:0;font-family:Georgia,serif;color:#16232f;background:#fff;line-height:1.65}
a{color:#2b2a55} .topbar{background:#2b2a55;color:#fff;padding:14px 20px;display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between}
.brand{font-size:26px;font-weight:bold;letter-spacing:.5px} .brand a{color:#fff;text-decoration:none}
.cta-btn{background:#7fd4c1;color:#111;padding:10px 18px;border-radius:6px;text-decoration:none;font-weight:bold;display:inline-block}
.nav{background:#eef2f8;padding:0 20px} .nav-list{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:4px}
.nav-list li{position:relative} .nav-list a,.nav-list button{display:block;padding:12px 14px;text-decoration:none;color:#16232f;background:none;border:0;font:inherit;cursor:pointer}
.nav-list a:hover,.nav-list button:hover{background:#fff} .nav-menu{display:none;position:absolute;left:0;top:100%;background:#fff;border:1px solid #ccc;min-width:240px;z-index:20;list-style:none;margin:0;padding:0}
@media (hover:hover){.has-menu:hover > .nav-menu{display:block}} .has-menu.open > .nav-menu{display:block} .nav-menu a{padding:10px 14px}
.hero{background:#2b2a55;color:#fff;padding:36px 20px} .hero-title{font-size:38px;margin:0 0 10px} .hero-sub{font-size:18px;max-width:760px}
.facts-bar{display:flex;flex-wrap:wrap;gap:10px;margin:18px 0 0;padding:0;list-style:none} .facts-item{background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.4);padding:8px 12px;border-radius:6px}
.coil-ring{display:flex;gap:8px;margin-top:18px} .coil{width:34px;height:34px;border:3px solid #7fd4c1;border-radius:50%}
.main{max-width:980px;margin:0 auto;padding:24px 20px} .section{margin:28px 0} .section-title{font-size:24px;border-bottom:3px solid #7fd4c1;padding-bottom:6px} .lead{font-size:18px}
.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:16px} .card{border:1px solid #ccc;border-radius:8px;padding:16px;background:#eef2f8} .card-title{font-size:19px;margin:0 0 6px} .card-text{margin:0}
.table-wrap{overflow-x:auto} .spec-table,.glance-table{border-collapse:collapse;width:100%} .spec-table th,.spec-table td,.glance-table th,.glance-table td{border:1px solid #bbb;padding:9px;text-align:left}
.form{border:1px solid #ccc;border-radius:8px;padding:20px;background:#eef2f8} .field{margin:0 0 14px} .label{display:block;font-weight:bold;margin-bottom:4px} .input,.textarea{width:100%;padding:10px;border:1px solid #999;border-radius:5px;font:inherit} .textarea{min-height:120px}
.btn{background:#2b2a55;color:#fff;border:0;padding:12px 22px;border-radius:6px;font-size:16px;cursor:pointer} .btn-primary{background:#7fd4c1;color:#111}
.checklist{border:2px solid #7fd4c1;border-radius:8px;padding:18px;background:#fffef5} .related{display:flex;flex-wrap:wrap;gap:10px;margin:24px 0} .related-link{border:1px solid #2b2a55;border-radius:20px;padding:6px 14px;text-decoration:none}
.footer{background:#2b2a55;color:#fff;padding:28px 20px;margin-top:30px} .footer-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:18px;max-width:980px;margin:0 auto} .footer-col h3{margin-top:0} .footer-link{color:#fff;display:block;padding:3px 0}
.crumbs{font-size:14px;color:#555} .blog-list{list-style:none;padding:0} .blog-item{border-bottom:1px solid #ddd;padding:16px 0} .blog-excerpt{margin:6px 0} .note{background:#eef2f8;border-left:4px solid #7fd4c1;padding:12px 16px} .caption{font-size:14px;color:#444} .figure{margin:18px 0} img{max-width:100%;height:auto} .figure img{max-width:100%;height:auto} .img-wrap img{max-width:100%;height:auto}
@media(max-width:640px){.hero-title{font-size:28px} .nav-menu{position:static}}

/* lang-switch (stage4): minimal, does not disturb header layout */
.lang-switch{display:inline-block;position:relative}
.lang-switch summary{cursor:pointer;list-style:none;font-weight:700;padding:6px 8px}
.lang-switch summary::-webkit-details-marker{display:none}
.lang-switch ul{position:absolute;right:0;top:100%;background:#fff;border:1px solid #ccc;list-style:none;margin:0;padding:0;min-width:150px;z-index:40}
.lang-switch ul li a,.lang-switch ul li span{display:block;padding:8px 12px}
/* R2: sample-only visual refinements */
.hero{position:relative;display:grid;grid-template-columns:minmax(0,1fr) minmax(220px,340px);gap:28px;align-items:center;padding:32px max(20px,calc((100% - 1120px)/2))}
.hero-copy{min-width:0}.hero-title{line-height:1.18}.hero-sub{margin:16px 0 22px}
.hero-home .coil-ring{position:absolute;right:24px;bottom:12px;opacity:.25;transform:scale(.5);transform-origin:bottom right;pointer-events:none}
.hero-lineup{margin:0;position:relative;z-index:1;padding:12px;background:#fff;border-radius:8px}
.hero-lineup img{display:block;width:100%;height:auto}.hero-lineup .caption{margin-top:10px;color:#2b2a55}
.hero-category{grid-template-columns:minmax(0,1fr) 100px}.hero-category .coil-ring{margin:0;width:100px;height:100px;align-items:center;justify-content:center}
.hero-category .coil-ring > .coil{transform:scale(.7);flex-shrink:0}
.facts-bar{gap:8px}.facts-item{font-size:14px;padding:6px 10px}
.main{max-width:1120px;padding-top:20px;padding-bottom:36px}
.section{margin:36px 0;padding:16px 0 24px}.section:nth-of-type(even){background:#eef2f8;padding:32px 24px;border-radius:4px}
.section-title{font-size:30px;line-height:1.25;border-bottom:0;padding-bottom:0;margin:0 0 26px;color:#2b2a55;max-width:30ch}
.section:nth-of-type(odd) > .section-title{border-left:4px solid #7fd4c1;padding-left:16px}
.section p{line-height:1.85;margin:0 0 26px}.section p:last-child{margin-bottom:0}
.card-grid{grid-template-columns:repeat(auto-fit,minmax(min(100%,260px),1fr));gap:20px}
.card{background:#fff;border:0;border-top:2px solid #7fd4c1;border-radius:0;padding:24px 18px}
.card-title{font-size:21px;line-height:1.35;margin:0 0 16px}.card-title a{text-decoration-thickness:1px;text-underline-offset:4px}
.card .card-text{font-size:15px;line-height:1.7;color:#45515f;margin:0}
.has-menu > button{background:#2b2a55;color:#fff;font-weight:bold}.has-menu > button:hover{background:#3c3b69}
.nav-menu{width:560px;min-width:0;max-width:calc(100vw - 40px);column-count:2;column-gap:12px;padding:12px;box-shadow:0 12px 24px #2b2a5520;max-height:65vh;overflow-y:auto}
.nav-menu li{break-inside:avoid}.nav-menu a{font-size:15px;line-height:1.45;border-bottom:1px solid #eef2f8}
.table-wrap{max-width:100%;overscroll-behavior-x:contain}.glance-table th,.spec-table th{background:#2b2a55;color:#fff}.glance-table td,.glance-table th,.spec-table td,.spec-table th{padding:14px;font-size:16px;line-height:1.6}
.footer{padding-top:44px;padding-bottom:44px}.footer-grid{max-width:1080px;grid-template-columns:minmax(180px,1fr) minmax(0,3fr);gap:40px}
.footer-col{min-width:0}.footer-col:last-child{column-count:3;column-gap:28px}.footer-col:last-child h3{column-span:all}.footer-link{break-inside:avoid;padding:6px 0;font-size:15px;line-height:1.5}
@media(max-width:900px){.hero{grid-template-columns:minmax(0,1fr) minmax(180px,260px)}.hero-category{grid-template-columns:minmax(0,1fr) 100px}.footer-col:last-child{column-count:2}}
@media(max-width:640px){
 .topbar{flex-wrap:nowrap;gap:14px;padding:12px 16px}.brand{font-size:23px}.topbar .cta-btn{max-width:245px;font-size:14px;line-height:1.35;padding:9px 12px}
 .nav{padding:0 12px;position:relative}.nav-list{flex-wrap:nowrap;overflow-x:auto;white-space:nowrap;gap:0;scrollbar-width:thin}.nav-list > li{position:static;flex-shrink:0}.nav-list > li > a,.nav-list > li > button{padding:11px 12px;font-size:14px}
 .nav-menu{position:absolute;top:100%;left:12px;width:calc(100% - 24px);max-width:calc(100% - 24px);max-height:min(48dvh,340px);columns:auto;white-space:normal;overflow-y:auto;overscroll-behavior:contain}
 .hero{grid-template-columns:minmax(0,1fr);gap:20px;padding:26px 20px}.hero-title{font-size:30px}.hero-sub{font-size:17px}.hero-lineup{width:100%;max-width:300px;justify-self:center}
 .hero-category{grid-template-columns:minmax(0,1fr) 48px;gap:12px}.hero-category .coil-ring{width:48px;height:70px}.hero-category .coil-ring > .coil{transform:scale(.36)}
 .main{padding:16px}.section{margin:24px 0;padding:16px 0 24px}.section:nth-of-type(even){padding:26px 12px}.section-title{font-size:25px;margin-bottom:24px}.section p{line-height:1.9;margin-bottom:30px}
 .table-wrap{margin-left:-8px;margin-right:-8px;max-width:calc(100% + 16px)}.glance-table,.spec-table{min-width:580px}
 .footer-grid{grid-template-columns:minmax(0,1fr);gap:26px}.footer-col:last-child{column-count:1}
}

/* R3: visual hierarchy, reading rhythm and wrapping navigation */
.card:nth-child(-n+5){border-top-width:5px;background:#e3eeef;padding:28px 22px}
.card:nth-child(-n+5) .card-title{font-size:24px}
.card:nth-child(n+6){border-top-width:1px;background:#f8fafb;padding:22px 18px}
.card:nth-child(n+6) .card-title{font-size:19px;font-weight:400}
.nav-menu li:nth-child(-n+5) > a{font-size:16px;font-weight:700}
.nav-menu li:nth-child(n+6) > a{font-size:15px;font-weight:400}
.section p{max-width:70ch;line-height:1.85;margin-bottom:30px}
.section:not(:has(.card-grid)):nth-of-type(3n+1){background:#fff;border-radius:0;border-left:4px solid #7fd4c1;padding:28px 32px 36px}
.section:not(:has(.card-grid)):nth-of-type(3n+1) > .section-title{border:0;padding:0}
.section:not(:has(.card-grid)):nth-of-type(3n+2){background:#eef2f8;border:0;border-radius:4px;padding:36px 32px 40px}
.section:not(:has(.card-grid)):nth-of-type(3n+2) > .section-title{border:0;padding:0}
.section:not(:has(.card-grid)):nth-of-type(3n){background:#fff;border-radius:0;border-top:3px solid #2b2a55;padding:36px 0 40px}
.section:not(:has(.card-grid)):nth-of-type(3n) > .section-title{border:0;padding:0;font-size:34px;max-width:28ch}
@media(max-width:640px){
 .nav-list{flex-wrap:wrap;overflow:visible;white-space:normal;gap:0 4px}
 .nav-list > li{position:relative;flex:0 1 auto;min-width:0;max-width:100%}
 .nav-list > li > a,.nav-list > li > button{padding:10px 9px;white-space:normal;overflow-wrap:anywhere;line-height:1.5}
 .nav-list > .has-menu{flex-basis:100%}
 .nav-menu{position:static;width:100%;max-width:100%;min-width:0;columns:auto;max-height:min(48dvh,340px);overflow-x:hidden;overflow-y:auto;padding:10px;box-shadow:none}
 .nav-menu a{white-space:normal;overflow-wrap:anywhere}
 .section{margin:32px 0}
 .section:not(:has(.card-grid)):nth-of-type(3n+1){padding:26px 18px 32px}
 .section:not(:has(.card-grid)):nth-of-type(3n+2){padding:32px 18px 36px}
 .section:not(:has(.card-grid)):nth-of-type(3n){padding:32px 4px 36px}
 .section:not(:has(.card-grid)):nth-of-type(3n) > .section-title{font-size:28px}
 .section p{line-height:1.95;margin-bottom:36px}
}

/* R4: whole-row mobile menu, ordered footer groups and home detail rows */
.footer-col:last-child{column-count:auto;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:36px 28px;align-content:start}
.footer-col:last-child > h3{grid-column:1/-1;margin-bottom:0}
.footer-link-group{min-width:0;border-top:3px solid #7fd4c1;padding:16px 14px 12px;background:#ffffff0a}
@media(min-width:1024px){
 .hero-home + main.main{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));column-gap:32px;row-gap:72px}
 .hero-home + main.main > *{grid-column:span 12;min-width:0;margin-top:0;margin-bottom:0}
 .hero-home + main.main > section:nth-of-type(n+3):nth-of-type(-n+14){grid-column:span 6}
 .hero-home + main.main > section:nth-of-type(n+3):nth-of-type(-n+15){margin-top:24px}
}
@media(min-width:1280px){
 .hero-home + main.main > section.section:nth-of-type(3){grid-column:span 7}
 .hero-home + main.main > section.section:nth-of-type(4){grid-column:span 5}
 .hero-home + main.main > section.section:nth-of-type(5){grid-column:span 5}
 .hero-home + main.main > section.section:nth-of-type(6){grid-column:span 7}
 .hero-home + main.main > section.section:nth-of-type(7),.hero-home + main.main > section.section:nth-of-type(8),.hero-home + main.main > section.section:nth-of-type(9){grid-column:span 4}
 .hero-home + main.main > section.section:nth-of-type(12){grid-column:span 8}
 .hero-home + main.main > section.section:nth-of-type(13){grid-column:span 4}
 .hero-home + main.main > section.section:nth-of-type(14){grid-column:span 12}
}
@media(max-width:640px){
 .nav-menu{max-height:calc(20px + 6 * 44.1875px + 7px);border-bottom:6px solid #2b2a55;scrollbar-width:thin;scrollbar-color:#2b2a55 #d9e5ec;scroll-padding-bottom:10px}
 .nav-menu li{height:44.1875px}
 .nav-menu a{height:100%;display:flex;align-items:center}
 .nav-menu::-webkit-scrollbar{width:5px}.nav-menu::-webkit-scrollbar-thumb{background:#2b2a55}.nav-menu::-webkit-scrollbar-track{background:#d9e5ec}
 .footer-col:last-child{grid-template-columns:minmax(0,1fr);gap:40px}
 .footer-link-group{padding:18px 14px 14px}
}


/* lang-switch panel alignment fix (post-landing review 2026-11-01) */
.lang-switch ul{left:0;right:auto}