:root{
  --bg:#E7F4F8;--bg-deep:#D7ECF2;--surface:#F3FAFC;--surface-2:#EAF6F9;
  --title:#163038;--text:#1F3C44;--muted:#4A6E78;--soft:#6A8C96;
  --blue:#7EB8E0;--cyan:#6EC9D4;--deep:#1A3A44;--white:#F3FAFC;--seaweed:#5A8A6A;
  --border:rgba(26,58,68,.14);--border-strong:rgba(110,201,212,.50);
  --shadow:0 12px 28px rgba(22,48,56,.08);--max:1000px;--r:10px;
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;font-size:15px;line-height:1.7;overflow-x:hidden}a{color:inherit;text-decoration:none}button{font:inherit}img{display:block;max-width:100%}.locked{overflow:hidden}.skip-link{position:fixed;left:12px;top:-60px;z-index:999;background:var(--white);padding:8px 12px;border-radius:8px}.skip-link:focus{top:8px}.site-header{position:fixed;inset:0 0 auto 0;z-index:80}.top-strip{height:20px;background:var(--deep);color:var(--white);font-size:12px}.top-strip-inner,.brand-bar-inner{max-width:var(--max);height:100%;margin:auto;display:flex;align-items:center;justify-content:space-between;padding:0 16px}.text-button{border:0;background:transparent;color:var(--white);padding:0;min-width:44px;height:20px;cursor:pointer}.brand-bar{height:54px;background:var(--blue);border-bottom:1px solid var(--cyan)}.brand-link{min-height:44px;display:inline-flex;align-items:center;max-width:210px}.brand-logo,.menu-logo,.footer-logo{height:24px;width:auto;object-fit:contain;object-position:center}.brand-fallback{font-weight:800;color:var(--title);letter-spacing:.04em}.brand-actions{display:flex;align-items:center;gap:8px}.app-link,.menu-button{height:44px;display:inline-flex;align-items:center;justify-content:center;padding:0 14px;border-radius:9px;border:1px solid rgba(22,48,56,.22);background:rgba(243,250,252,.86);color:var(--title);font-size:14px;white-space:nowrap}.menu-button{cursor:pointer}.quick-nav{height:44px;background:var(--white);border-bottom:1px solid var(--border);display:flex;justify-content:center;gap:56px}.quick-item{min-width:72px;height:44px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;color:var(--muted);font-size:13px}.quick-dot{width:6px;height:6px;border-radius:50%;background:var(--cyan)}.quick-item.is-current{color:var(--deep);font-weight:700}.quick-item.is-current .quick-dot{background:var(--deep)}.site-main{padding-top:118px;min-height:60vh}.page-wrap{max-width:var(--max);margin:0 auto;padding:40px 16px 72px}.page-wrap.narrow{max-width:820px}.eyebrow{font-size:12px;letter-spacing:.14em;color:var(--seaweed);font-weight:700;text-transform:uppercase}.intro-line{border-left:3px solid var(--cyan);padding-left:18px;margin-bottom:28px}.intro-line h1,.page-title{font-size:24px;line-height:1.3;color:var(--title);margin:5px 0 10px}.lead{font-size:16px;color:var(--muted);max-width:780px}.section-title{font-size:20px;color:var(--title);margin:0 0 12px}.card-title{font-size:16px;color:var(--title);margin:0 0 8px}.btn-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:16px}.btn-primary,.btn-secondary{min-height:42px;padding:0 16px;border-radius:9px;display:inline-flex;align-items:center;justify-content:center;font-size:14px;white-space:nowrap}.btn-primary{background:linear-gradient(135deg,#7EB8E0 0%,#6EC9D4 100%);color:var(--title);border:1px solid rgba(26,58,68,.12)}.btn-secondary{background:var(--white);color:var(--deep);border:1px solid var(--deep)}a:hover,.text-button:hover,.menu-button:hover{filter:brightness(.98)}a:focus-visible,button:focus-visible{outline:3px solid rgba(90,138,106,.35);outline-offset:2px}.img-slot{background:var(--bg-deep);border:1px solid var(--border);border-radius:var(--r);display:flex;align-items:center;justify-content:center;overflow:hidden}.img-slot img{width:100%;height:100%;object-fit:contain;object-position:center}.img-slot.short{height:188px}.img-slot.banner{height:200px}.img-slot.app-shot{height:min(320px,66vw)}.img-slot.medium{height:220px}.img-slot.small{height:160px}.section-block{margin:38px 0}.soft-box{background:var(--surface);border:1px solid var(--border);border-radius:var(--r);box-shadow:var(--shadow);padding:20px}.deep-box{background:var(--deep);color:var(--white);border-radius:var(--r);padding:22px}.deep-box h2,.deep-box h3{color:var(--white)}.two-cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.three-notes{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.note-card{background:var(--surface-2);border-left:3px solid var(--cyan);border-radius:0 var(--r) var(--r) 0;padding:18px}.stack{display:grid;gap:16px}.alternating{display:grid;gap:18px}.alt-row{display:grid;grid-template-columns:1fr 1fr;gap:20px;align-items:center}.alt-row.reverse .alt-copy{order:-1}.alt-copy{background:var(--surface);border:1px solid var(--border);border-radius:var(--r);padding:20px}.status-list{display:grid;gap:10px}.status-item{display:grid;grid-template-columns:120px 1fr auto;gap:16px;align-items:center;background:var(--surface);border:1px solid var(--border);border-radius:var(--r);padding:14px 16px}.status-chip{padding:4px 10px;border-radius:999px;background:var(--bg-deep);color:var(--title);font-size:12px}.status-chip.done{background:#DDEFE4;color:#315D41}.memo-list{display:grid;gap:12px}.memo-row{display:grid;grid-template-columns:28px 1fr;gap:12px;padding:16px 0;border-bottom:1px solid var(--border)}.memo-index{width:28px;height:28px;border-radius:50%;background:var(--cyan);color:var(--title);display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:700}.topic-list{display:grid;gap:12px}.topic-item{background:var(--surface);border:1px solid var(--border);border-radius:var(--r);padding:18px 20px}.product-band{display:grid;grid-template-columns:minmax(220px,320px) 1fr;gap:28px;align-items:center;background:var(--surface);border:1px solid var(--border-strong);border-radius:12px;padding:22px;box-shadow:var(--shadow)}.app-icon-line{display:flex;align-items:center;gap:12px;margin-bottom:10px}.app-icon{width:48px;height:48px;object-fit:contain}.faq-list{display:grid;gap:12px}.faq-item{background:var(--surface);border:1px solid var(--border);border-radius:var(--r);padding:18px}.faq-item h2,.faq-item h3{margin:0 0 8px;color:var(--title);font-size:16px}.method-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.timeline{border-left:2px solid var(--cyan);padding-left:20px;display:grid;gap:18px}.timeline article{position:relative;background:var(--surface);border:1px solid var(--border);border-radius:var(--r);padding:18px}.timeline article:before{content:"";position:absolute;width:10px;height:10px;background:var(--deep);border-radius:50%;left:-26px;top:24px}.center-cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;max-width:820px;margin:0 auto}.center-card{text-align:center;background:var(--surface);border:1px solid var(--border);border-radius:var(--r);padding:22px}.term-section{background:var(--surface);border-top:3px solid var(--cyan);padding:20px;margin:18px 0;border-radius:0 0 var(--r) var(--r)}.contact-paths{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.contact-path{background:var(--surface);border:1px solid var(--border);border-radius:var(--r);padding:20px}.plain-list{padding-left:20px;margin:10px 0}.plain-list li{margin:8px 0}.site-footer{background:#143038;color:#E7F4F8;border-top:1px solid var(--cyan);font-size:13px}.footer-inner{max-width:var(--max);margin:auto;padding:34px 16px 80px}.footer-brand-line{display:flex;align-items:center;gap:10px}.footer-brand-line .brand-fallback{color:var(--white)}.footer-brand p{max-width:720px;color:#CDE3E8}.footer-groups{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:22px;margin:28px 0}.footer-groups h2{font-size:14px;margin:0 0 8px;color:var(--white)}.footer-groups a{display:block;color:#D5EBEF;padding:3px 0}.footer-bottom{border-top:1px solid rgba(110,201,212,.35);padding-top:14px;display:flex;gap:18px;flex-wrap:wrap;color:#CDE3E8}.overlay{position:fixed;inset:0;background:rgba(15,39,47,.38);z-index:120;opacity:0;transition:opacity .2s ease;pointer-events:none}.overlay.is-visible{opacity:1}.bay-menu{position:fixed;z-index:140;left:0;right:0;top:0;height:58vh;min-height:360px;background:var(--surface);transform:translateY(-105%);visibility:hidden;pointer-events:none;transition:transform .25s ease,visibility .25s ease;overflow:auto;box-shadow:0 18px 50px rgba(22,48,56,.20)}.bay-menu.is-open{transform:translateY(0);visibility:visible;pointer-events:auto}.bay-menu-head{position:sticky;top:0;background:var(--surface);display:flex;justify-content:space-between;align-items:center;padding:14px 16px;border-bottom:1px solid var(--border);z-index:2}.bay-menu-brand{display:flex;align-items:center;gap:9px;font-weight:800;color:var(--title)}.close-button{min-height:44px;padding:0 14px;border:1px solid var(--deep);border-radius:9px;background:var(--white);color:var(--deep);cursor:pointer}.bay-menu-grid{max-width:var(--max);margin:0 auto;padding:16px;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}.bay-menu-grid h2{font-size:14px;color:var(--title);margin:0 0 8px}.bay-menu-grid a{display:block;padding:9px 0;border-bottom:1px solid var(--border)}.bay-menu-grid strong,.bay-menu-grid span{display:block}.bay-menu-grid strong{font-size:14px;color:var(--title)}.bay-menu-grid span{font-size:12px;color:var(--muted)}.search-layer{position:fixed;z-index:145;left:0;right:0;top:74px;visibility:hidden;pointer-events:none;opacity:0;transition:.2s ease}.search-layer.is-open{visibility:visible;pointer-events:auto;opacity:1}.search-card{max-width:760px;margin:0 auto;background:var(--white);border:1px solid var(--border);border-radius:0 0 12px 12px;padding:18px 20px;box-shadow:var(--shadow)}.search-head{display:flex;align-items:center;justify-content:space-between}.search-head h2{font-size:20px;margin:0;color:var(--title)}.search-links{display:flex;gap:10px;flex-wrap:wrap}.search-links a{min-height:40px;padding:0 14px;border-radius:9px;border:1px solid var(--border);display:inline-flex;align-items:center;background:var(--surface-2);color:var(--deep)}.mobile-bottom{display:none}.brand-section{display:grid;grid-template-columns:1fr minmax(220px,340px);gap:22px;align-items:center}.brand-section .img-slot{min-height:220px}.quote-line{font-size:20px;line-height:1.5;color:var(--title);font-weight:700;margin:12px 0}.subtle{color:var(--soft);font-size:13px}.rule-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.rule-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--r);padding:18px}.vertical-notes{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;align-items:start}.vertical-note{min-height:300px;background:var(--surface);border:1px solid var(--border);border-radius:var(--r);padding:18px;display:flex;flex-direction:column;justify-content:flex-start}.vertical-note:nth-child(2){margin-top:36px}.vertical-note:nth-child(3){margin-top:72px}.short-cover-page .cover-lead{display:grid;grid-template-columns:1fr;gap:18px}.single-note article{padding:20px 0;border-bottom:1px solid var(--border)}.single-note article:last-child{border-bottom:0}.period-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.period-card{background:var(--surface);border-top:4px solid var(--cyan);border-radius:0 0 var(--r) var(--r);padding:20px}.period-card:nth-child(2){margin-top:24px}.period-card:nth-child(3){margin-top:48px}.check-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.check-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--r);padding:18px}.highlight-band{background:var(--bg-deep);border:1px solid var(--border-strong);border-radius:var(--r);padding:22px;margin:22px 0}.numbered-flow{counter-reset:item;display:grid;gap:14px}.numbered-flow article{counter-increment:item;background:var(--surface);border:1px solid var(--border);border-radius:var(--r);padding:18px 18px 18px 58px;position:relative}.numbered-flow article:before{content:counter(item);position:absolute;left:18px;top:18px;width:28px;height:28px;border-radius:50%;background:var(--deep);color:var(--white);display:flex;align-items:center;justify-content:center;font-size:12px}
@media (max-width:760px){
  .quick-nav{display:none}.site-main{padding-top:74px}.page-wrap{padding:28px 16px 74px}.top-strip-inner,.brand-bar-inner{padding:0 16px}.brand-actions{gap:5px}.app-link,.menu-button{padding:0 10px}.brand-link{max-width:150px}.two-cards,.three-notes,.method-grid,.contact-paths,.center-cards,.rule-grid,.check-grid{grid-template-columns:1fr}.alt-row,.product-band,.brand-section{grid-template-columns:1fr}.alt-row.reverse .alt-copy{order:initial}.vertical-notes{grid-template-columns:1fr}.vertical-note,.vertical-note:nth-child(2),.vertical-note:nth-child(3){min-height:auto;margin-top:0}.period-grid{grid-template-columns:1fr}.period-card:nth-child(2),.period-card:nth-child(3){margin-top:0}.status-item{grid-template-columns:1fr;gap:5px}.footer-groups{grid-template-columns:repeat(2,minmax(0,1fr))}.footer-inner{padding-bottom:84px}.mobile-bottom{position:fixed;z-index:95;left:0;right:0;bottom:0;height:calc(48px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);background:var(--white);border-top:1px solid var(--border);display:grid;grid-template-columns:repeat(4,1fr)}.mobile-bottom a{display:flex;align-items:center;justify-content:center;min-height:48px;color:var(--muted);font-size:13px}.mobile-bottom a.is-current{background:var(--cyan);color:var(--deep);font-weight:800}.bay-menu{height:58vh;min-height:380px}.bay-menu-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.search-layer{inset:0;background:var(--deep)}.search-card{height:100%;max-width:none;border:0;border-radius:0;background:var(--deep);color:var(--white);padding:calc(18px + env(safe-area-inset-top)) 16px 16px}.search-head h2{color:var(--white)}.search-layer .close-button{background:var(--white)}.search-links a{background:transparent;border-color:rgba(243,250,252,.35);color:var(--white)}.search-card p{color:#D5EBEF}.img-slot.medium{height:190px}.img-slot.banner{height:200px}.site-footer{margin-bottom:48px}}
@media (max-width:380px){.app-link,.menu-button{padding:0 8px;font-size:13px}.brand-fallback{font-size:15px}.bay-menu-grid{grid-template-columns:1fr}.footer-groups{grid-template-columns:1fr}}