:root{
  --bg:#E8E4DC;--bg-deep:#D6D0C6;--paper:#F6F3ED;--paper-2:#EFEBE3;--ink:#2C2A26;--text:#3A372F;--muted:#6B675E;--soft:#8A8478;--rock:#6B675E;--deep:#3E3B36;--light:#C8C2B6;--warm:#F7F3EB;--moss:#6A7A58;--clay:#A65A3A;--border:rgba(62,59,54,.16);--accent-border:rgba(166,90,58,.40);--shadow:0 12px 28px rgba(44,42,38,.08)
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;font-size:15px;line-height:1.7;overflow-x:hidden}body.ui-locked{overflow:hidden}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}button{font:inherit}button,a{touch-action:manipulation}.top-inner,.footer-inner,.content-wrap,.tabs-inner{width:min(1080px,calc(100% - 32px));margin:0 auto}.stone-line{position:fixed;top:0;left:0;right:0;z-index:70;height:22px;background:var(--deep);color:var(--warm);font-size:12px}.stone-line .top-inner{height:22px;display:flex;align-items:center;justify-content:space-between}.plain-button{border:0;background:transparent;color:inherit;height:22px;padding:0 8px;cursor:pointer}.rock-header{position:fixed;top:22px;left:0;right:0;z-index:68;height:56px;background:var(--bg-deep);border-bottom:1px solid var(--border)}.rock-header-inner{height:56px;display:flex;align-items:center;justify-content:space-between}.brand-link{height:44px;display:flex;align-items:center;max-width:50%}.brand-logo{height:26px;width:auto;object-fit:contain}.brand-text{font-size:16px;font-weight:700;color:var(--ink)}.header-actions{display:flex;align-items:center;gap:8px}.rockbox-open,.header-app,.search-close,.rockbox-close{min-height:44px;border-radius:9px;padding:0 14px;display:inline-flex;align-items:center;justify-content:center;cursor:pointer}.rockbox-open{background:var(--warm);color:var(--deep);border:1px solid var(--accent-border)}.header-app{background:linear-gradient(135deg,#8A8478 0%,#6B675E 55%,#3E3B36 100%);color:var(--warm)}.rock-tabs{position:fixed;top:78px;left:0;right:0;z-index:66;height:38px;background:var(--warm);border-bottom:1px solid var(--border)}.tabs-inner{height:38px;display:flex;align-items:stretch;justify-content:center;gap:8px}.tabs-inner a{min-width:84px;display:flex;align-items:center;justify-content:center;font-size:13px;border-radius:8px 8px 0 0}.tabs-inner a.is-active{background:var(--deep);color:var(--warm)}.site-main{padding-top:116px;min-height:70vh}.content-wrap{padding:34px 0 56px}.page-head{margin-bottom:28px}.page-head h1,.hero-intro h1{font-size:24px;line-height:1.3;color:var(--ink);margin:0 0 12px}.page-head p,.hero-intro p{max-width:760px;margin:0;color:var(--text)}h2{font-size:20px;line-height:1.45;color:var(--ink);margin:0 0 12px}h3{font-size:16px;line-height:1.5;color:var(--ink);margin:0 0 8px}p{margin:0 0 14px}.eyebrow{display:inline-flex;align-items:center;min-height:28px;padding:2px 10px;border:1px solid var(--accent-border);border-radius:999px;background:var(--warm);color:var(--clay);font-size:13px;margin-bottom:12px}.hero-intro{padding:42px 0 34px}.hero-intro .lead{font-size:18px;color:var(--deep);max-width:720px;margin-bottom:12px}.hero-intro .hero-copy{max-width:800px}.btn-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}.btn-primary,.btn-secondary{height:42px;padding:0 18px;border-radius:9px;display:inline-flex;align-items:center;justify-content:center;font-size:14px;font-weight:650;white-space:nowrap}.btn-primary{background:linear-gradient(135deg,#8A8478 0%,#6B675E 55%,#3E3B36 100%);color:var(--warm)}.btn-secondary{background:var(--warm);color:var(--deep);border:1px solid var(--clay)}.btn-primary:hover,.btn-secondary:hover,.header-app:hover,.rockbox-open:hover{transform:translateY(-1px)}a:focus-visible,button:focus-visible{outline:3px solid rgba(166,90,58,.35);outline-offset:2px}.media-slot{background:var(--paper-2);border:1px solid var(--border);border-radius:10px;display:flex;align-items:center;justify-content:center;overflow:hidden}.media-slot img{width:100%;height:100%;object-fit:contain;object-position:center}.media-slot.small{min-height:72px}.slot-168{height:168px}.slot-190{height:190px}.slot-220{height:220px}.slot-app{height:340px}.slot-icon{width:64px;height:64px}.section-block{padding:28px 0;border-top:1px solid var(--border)}.two-feature{display:grid;grid-template-columns:1fr 1fr;gap:18px}.feature-card,.note-card,.tile,.policy-card,.method-card,.faq-item,.theme-row,.memo-item,.archive-cell,.product-panel{background:var(--paper);border:1px solid var(--border);border-radius:10px;box-shadow:var(--shadow)}.feature-card{padding:18px}.feature-card .media-slot{margin-bottom:16px}.number-strips{display:grid;gap:10px}.number-strip{display:grid;grid-template-columns:56px 1fr;gap:14px;align-items:start;padding:14px 16px;background:var(--paper);border:1px solid var(--border);border-radius:10px}.number-strip .mark{width:42px;height:42px;border-radius:50%;display:flex;align-items:center;justify-content:center;background:var(--deep);color:var(--warm);font-weight:700}.number-strip p{margin-bottom:0}.split-notes{display:grid;grid-template-columns:1fr 1fr;gap:18px}.note-card{padding:18px}.shelf-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.archive-cell{padding:16px;min-height:145px;border-top:4px solid var(--moss)}.archive-cell:nth-child(even){border-top-color:var(--clay)}.letter-list{display:grid;gap:10px}.letter-item{display:grid;grid-template-columns:48px 1fr;gap:14px;padding:14px 16px;border-bottom:1px solid var(--border);background:rgba(246,243,237,.58)}.letter-item strong{color:var(--clay)}.timeline{display:flex;gap:12px;overflow-x:auto;padding:4px 0 10px;scrollbar-width:thin}.timeline-node{flex:1 0 190px;background:var(--paper);border:1px solid var(--border);border-radius:10px;padding:16px;position:relative}.timeline-node:before{content:"";position:absolute;left:16px;top:-5px;width:10px;height:10px;border-radius:50%;background:var(--moss)}.status{display:inline-flex;margin-top:6px;font-size:12px;padding:2px 8px;border-radius:999px;background:var(--bg-deep);color:var(--deep)}.app-copy{display:grid;gap:18px}.app-visual{display:grid;grid-template-columns:minmax(0,1fr) 72px;gap:12px;align-items:end;max-width:560px}.points-list{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.points-list div{background:var(--paper);border-left:4px solid var(--moss);padding:14px 16px;border-radius:8px}.faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}.faq-item{padding:16px}.brand-panel{background:var(--deep);color:var(--warm);padding:22px;border-radius:12px}.brand-panel h2,.brand-panel h3{color:var(--warm)}.brand-panel p{color:#EEE9DF}.intro-banner{margin:18px 0 26px}.catalog-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.tile{padding:17px}.tile .tag{display:inline-block;font-size:12px;color:var(--clay);margin-bottom:7px}.observation-directory{display:grid;gap:14px}.observation-directory article{display:grid;grid-template-columns:150px 1fr;gap:18px;padding:16px 0;border-bottom:1px solid var(--border)}.observation-directory .index{background:var(--deep);color:var(--warm);border-radius:10px;padding:16px}.wall-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.wall-card{background:var(--paper);border:1px solid var(--border);border-radius:10px;padding:18px;min-height:220px}.wall-card:nth-child(2n){background:var(--paper-2)}.memo-columns{display:grid;grid-template-columns:1fr 1fr;gap:16px}.memo-item{padding:18px}.memo-item ul,.policy-card ul,.method-card ul{padding-left:20px;margin:8px 0 0}.policy-stack{display:grid;gap:14px}.policy-card,.method-card{padding:18px}.checklist{display:grid;gap:10px}.checklist .memo-item{display:grid;grid-template-columns:34px 1fr;gap:12px}.checkmark{width:28px;height:28px;border-radius:7px;background:var(--moss);color:var(--warm);display:flex;align-items:center;justify-content:center}.method-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.theme-list{display:grid;gap:12px}.theme-row{padding:16px;display:grid;grid-template-columns:150px 1fr;gap:18px}.shelf-large{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.shelf-large .archive-cell{min-height:190px}.product-panel{padding:20px}.product-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:20px;align-items:start}.legal-stack{display:grid;gap:14px}.legal-stack section{background:var(--paper);border:1px solid var(--border);border-radius:10px;padding:18px}.help-index{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.help-index a{background:var(--paper);border:1px solid var(--border);border-radius:10px;padding:16px;min-height:92px}.faq-long{display:grid;gap:12px}.faq-long details{background:var(--paper);border:1px solid var(--border);border-radius:10px;padding:14px 16px}.faq-long summary{cursor:pointer;font-weight:700;color:var(--ink);min-height:30px}.contact-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.contact-grid .policy-card{min-height:180px}.site-footer{background:#2A2824;color:#E8E4DC;border-top:1px solid #C8C2B6;font-size:13px;padding:34px 0 72px}.footer-brand{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:20px}.footer-logo{height:26px;width:auto;object-fit:contain}.footer-brand strong{font-size:16px}.footer-brand span{color:#C8C2B6}.footer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.footer-grid h2{font-size:14px;color:var(--warm);margin-bottom:8px}.footer-grid a{display:block;color:#E8E4DC;min-height:28px}.footer-grid a:hover{color:#fff}.footer-note{margin-top:22px;color:#D6D0C6}.footer-copy{color:#C8C2B6;margin-bottom:0}.screen-mask{position:fixed;inset:0;z-index:80;background:rgba(42,40,36,.48);opacity:0;visibility:hidden;pointer-events:none;transition:.2s}.screen-mask.is-open{opacity:1;visibility:visible;pointer-events:auto}.rockbox{position:fixed;z-index:90;left:0;top:0;bottom:0;width:380px;max-width:88vw;background:var(--warm);transform:translateX(-102%);visibility:hidden;pointer-events:none;transition:transform .24s ease;overflow:auto}.rockbox.is-open{transform:translateX(0);visibility:visible;pointer-events:auto}.rockbox-head{position:sticky;top:0;background:var(--warm);border-bottom:1px solid var(--border);padding:10px 14px;display:flex;align-items:center;justify-content:space-between;z-index:2}.rockbox-brand{display:flex;align-items:center;gap:9px;font-weight:700}.rockbox-brand img{height:26px;width:auto;object-fit:contain}.rockbox-close,.search-close{background:var(--paper);border:1px solid var(--accent-border);color:var(--deep)}.rockbox-groups{padding:10px 14px 28px}.rockbox-groups section{padding:10px 0}.rockbox-groups h2{font-size:14px;color:var(--clay);margin-bottom:6px}.rockbox-groups a{display:block;padding:10px 0;border-bottom:1px solid var(--border)}.rockbox-groups a strong{display:block}.rockbox-groups a span{display:block;font-size:12px;color:var(--muted)}.search-layer{position:fixed;z-index:88;top:78px;left:0;right:0;background:var(--bg-deep);padding:16px;visibility:hidden;opacity:0;pointer-events:none;transition:.2s}.search-layer.is-open{visibility:visible;opacity:1;pointer-events:auto}.search-card{width:min(760px,100%);margin:0 auto;background:var(--paper);border:1px solid var(--border);box-shadow:var(--shadow);border-radius:12px;padding:18px}.search-head{display:flex;align-items:center;justify-content:space-between}.search-presets{display:flex;flex-wrap:wrap;gap:8px}.search-presets a{display:inline-flex;min-height:44px;align-items:center;padding:0 14px;border:1px solid var(--accent-border);border-radius:9px;background:var(--warm)}.mobile-bottom{display:none}
@media(max-width:800px){.rock-tabs{display:none}.site-main{padding-top:78px}.content-wrap{padding-top:24px;padding-bottom:78px}.hero-intro{padding-top:30px}.two-feature,.split-notes,.faq-grid,.method-grid,.memo-columns,.product-grid,.contact-grid{grid-template-columns:1fr}.shelf-grid,.shelf-large{grid-template-columns:1fr 1fr}.catalog-grid,.wall-grid{grid-template-columns:1fr 1fr}.observation-directory article,.theme-row{grid-template-columns:1fr}.observation-directory .index{min-height:auto}.points-list{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr 1fr}.site-footer{padding-bottom:88px}.mobile-bottom{position:fixed;z-index:65;left:0;right:0;bottom:0;height:calc(48px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);display:grid;grid-template-columns:repeat(5,1fr);background:var(--warm);border-top:1px solid var(--border)}.mobile-bottom a{display:flex;align-items:center;justify-content:center;font-size:13px}.mobile-bottom a.is-active{background:var(--clay);color:var(--warm)}.search-layer{top:0;bottom:0;background:var(--deep);padding:76px 16px 16px}.search-card{background:var(--deep);border-color:rgba(247,243,235,.22);color:var(--warm);box-shadow:none}.search-head strong,.search-card p{color:var(--warm)}.search-presets a{color:var(--warm);background:transparent;border-color:rgba(247,243,235,.34)}.search-close{background:var(--warm)}.app-visual{grid-template-columns:1fr 64px}}
@media(max-width:560px){.top-inner,.footer-inner,.content-wrap,.tabs-inner{width:calc(100% - 32px)}.stone-line .top-inner>span{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:78%}.header-actions{gap:6px}.rockbox-open,.header-app{padding:0 11px}.brand-link{max-width:42%}.catalog-grid,.wall-grid,.shelf-grid,.shelf-large{grid-template-columns:1fr}.number-strip{grid-template-columns:46px 1fr}.letter-item{grid-template-columns:38px 1fr}.footer-grid{grid-template-columns:1fr 1fr;gap:14px}.slot-app{height:300px}}