:root{
  --bg:#E8E4DC;--deep-bg:#D6D0C6;--paper:#F6F3ED;--sub:#EFEBE3;--ink:#2C2A26;--text:#3A372F;
  --muted:#6B675E;--soft:#8A8478;--rock:#6B675E;--deep-rock:#3E3B36;--light-rock:#C8C2B6;
  --warm:#F7F3EB;--moss:#6A7A58;--clay:#A65A3A;--line:rgba(62,59,54,.16);--accent-line:rgba(166,90,58,.40);
  --shadow:0 12px 28px rgba(44,42,38,.08);--max:1080px;
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:"Microsoft YaHei","PingFang SC","Noto Sans CJK SC",system-ui,sans-serif;font-size:15px;line-height:1.7;overflow-x:hidden}body.ui-locked{overflow:hidden}a{color:inherit;text-decoration:none}button,input{font:inherit}button{cursor:pointer}img{max-width:100%;display:block}a,button,input{outline-offset:3px}a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--clay)}
.skip-link{position:fixed;left:12px;top:-60px;z-index:200;background:var(--warm);color:var(--deep-rock);padding:10px 14px;border-radius:8px}.skip-link:focus{top:8px}
.stone-line{position:fixed;z-index:100;left:0;right:0;top:0;height:22px;background:var(--deep-rock);color:var(--warm);font-size:12px}.stone-line-inner,.rock-bar-inner{max-width:var(--max);height:100%;margin:auto;padding:0 16px;display:flex;align-items:center;justify-content:space-between}.stone-search-btn{border:0;background:transparent;color:var(--warm);min-height:22px;padding:0 8px}.stone-search-btn:hover{text-decoration:underline}
.rock-bar{position:fixed;z-index:99;left:0;right:0;top:22px;height:56px;background:var(--deep-bg);border-bottom:1px solid var(--line)}.brand-link{display:flex;align-items:center;min-height:44px}.brand-logo,.drawer-logo,.footer-logo{height:26px;width:auto;object-fit:contain;object-position:center}.brand-text{font-size:16px;font-weight:800;color:var(--deep-rock)}.rock-actions{display:flex;gap:8px;align-items:center}.drawer-btn,.app-link{min-height:44px;padding:0 15px;border-radius:9px;display:inline-flex;align-items:center;justify-content:center;font-size:14px;white-space:nowrap}.drawer-btn{border:1px solid var(--line);background:var(--warm);color:var(--deep-rock)}.app-link{background:linear-gradient(135deg,#8A8478 0%,#6B675E 55%,#3E3B36 100%);color:var(--warm);border:1px solid transparent}.drawer-btn:hover,.app-link:hover{transform:translateY(-1px)}
.rock-tabs{position:fixed;z-index:98;left:0;right:0;top:78px;height:38px;background:var(--warm);border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:center;gap:6px;padding:4px 16px}.rock-tabs a{height:30px;min-width:74px;padding:0 14px;border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:13px;color:var(--deep-rock)}.rock-tabs a:hover{background:var(--sub)}.rock-tabs a.is-current{background:var(--deep-rock);color:var(--warm)}
.site-main{padding-top:116px;min-height:60vh}.container{width:min(calc(100% - 32px),var(--max));margin:0 auto}.page-hero{padding:48px 0 28px}.page-hero.compact{padding-bottom:18px}.eyebrow{display:inline-flex;align-items:center;gap:7px;font-size:12px;letter-spacing:.08em;color:var(--clay);font-weight:800}.eyebrow:before{content:"";width:18px;height:1px;background:var(--clay)}h1,h2,h3{color:var(--ink);margin-top:0}h1{font-size:24px;line-height:1.3;margin-bottom:14px}h2{font-size:20px;line-height:1.35}h3{font-size:16px;line-height:1.45}.lead{max-width:800px;margin:0;color:var(--text)}.section{padding:30px 0}.section-head{display:flex;justify-content:space-between;gap:20px;align-items:end;margin-bottom:16px}.section-head p{margin:0;color:var(--muted);max-width:620px}.paper{background:var(--paper);border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow)}.sub-paper{background:var(--sub);border:1px solid var(--line);border-radius:10px}.prose p{margin:0 0 14px}.prose p:last-child{margin-bottom:0}.muted{color:var(--muted)}
.btn-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}.btn-primary,.btn-secondary{min-height:42px;padding:0 18px;border-radius:9px;display:inline-flex;align-items:center;justify-content:center;font-size:14px;white-space:nowrap}.btn-primary{background:linear-gradient(135deg,#8A8478 0%,#6B675E 55%,#3E3B36 100%);color:var(--warm);border:1px solid transparent}.btn-secondary{background:var(--warm);color:var(--deep-rock);border:1px solid var(--clay)}.btn-primary:hover,.btn-secondary:hover{box-shadow:0 8px 18px rgba(44,42,38,.10);transform:translateY(-1px)}
.media-slot{background:var(--warm);border:1px solid var(--line);border-radius:12px;display:flex;align-items:center;justify-content:center;overflow:hidden}.media-slot img{width:100%;height:100%;object-fit:contain;object-position:center}.media-168{height:168px}.media-190{height:190px}.media-220{height:220px}.media-app{height:min(340px,60vw)}.media-icon{width:48px;height:48px;border-radius:12px}.media-icon img{width:48px;height:48px;object-fit:contain}
.intro-stone{padding:54px 0 36px}.intro-card{padding:28px;border-left:4px solid var(--clay);background:var(--paper);border-radius:0 12px 12px 0;box-shadow:var(--shadow)}.intro-card .mini-logo{width:58px;height:34px;display:flex;align-items:center;margin-bottom:12px}.intro-card .mini-logo img{max-height:34px;object-fit:contain}.intro-card p{max-width:760px;margin:0}.home-main-copy{margin:14px 0 0;padding:16px 18px;background:var(--sub);border-left:3px solid var(--clay);border-radius:0 9px 9px 0}.home-duo{display:grid;grid-template-columns:1fr 1fr;gap:18px}.home-duo article{padding:18px}.home-duo .media-slot{margin-bottom:16px}.home-duo p{margin-bottom:0}.numbered-strips{display:grid;gap:10px}.numbered-strips article{display:grid;grid-template-columns:58px 1fr;gap:16px;padding:16px 18px;background:var(--paper);border:1px solid var(--line);border-radius:10px}.cn-index{width:42px;height:42px;border-radius:50%;display:flex;align-items:center;justify-content:center;background:var(--deep-rock);color:var(--warm);font-weight:800}.numbered-strips h3{margin-bottom:6px}.numbered-strips p{margin:0}.note-columns{display:grid;grid-template-columns:1fr 1fr;gap:16px}.note-columns article{padding:20px}.note-columns ul{margin:0;padding-left:20px}.shelf-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}.shelf-grid article{min-height:150px;padding:16px;background:var(--warm);border:1px solid var(--line);border-top:4px solid var(--moss);border-radius:9px}.shelf-grid p{margin:0}.editorial-stack{display:grid;gap:9px}.editorial-stack article{display:flex;gap:14px;align-items:flex-start;padding:14px 16px;border-bottom:1px solid var(--line);background:var(--paper)}.editorial-stack b{min-width:34px;color:var(--clay)}.process-track{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;position:relative}.process-node{padding:20px;background:var(--paper);border:1px solid var(--line);border-radius:10px}.process-node .status{display:inline-block;padding:3px 9px;border-radius:999px;background:var(--deep-rock);color:var(--warm);font-size:12px;margin-bottom:9px}.app-story{display:grid;gap:18px}.app-copy{padding:22px}.app-visual{display:grid;grid-template-columns:minmax(0,1fr) 72px;gap:16px;align-items:end;max-width:560px;margin:0 auto}.home-tail{display:grid;grid-template-columns:1.05fr .95fr;gap:18px}.home-tail>article{padding:20px}.faq-mini{display:grid;gap:10px}.faq-mini details{background:var(--warm);border:1px solid var(--line);border-radius:9px;padding:12px 14px}.faq-mini summary{cursor:pointer;font-weight:700;color:var(--ink)}.faq-mini p{margin:9px 0 0}
.observe-directory{display:grid;gap:12px;counter-reset:obs}.observe-directory article{display:grid;grid-template-columns:180px 1fr;gap:18px;padding:20px;border:1px solid var(--line);background:var(--paper);border-radius:10px}.observe-directory h2{margin-bottom:0}.observe-directory .observe-note{color:var(--muted)}
.card-wall{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.card-wall article{padding:20px;background:var(--paper);border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow)}.card-wall article:nth-child(3n){grid-column:span 2;background:var(--sub)}
.memo-list{display:grid;gap:12px}.memo-list article{position:relative;padding:18px 18px 18px 52px;background:var(--paper);border:1px solid var(--line);border-radius:10px}.memo-list article:before{content:"✓";position:absolute;left:18px;top:18px;width:24px;height:24px;border-radius:50%;display:flex;align-items:center;justify-content:center;background:var(--moss);color:var(--warm);font-weight:800}.memo-list p{margin:0}.method-steps{display:grid;grid-template-columns:1fr 1fr;gap:14px}.method-steps article{padding:20px;background:var(--paper);border-left:3px solid var(--clay);border-radius:0 10px 10px 0}.theme-list{display:grid;gap:0;border:1px solid var(--line);border-radius:12px;overflow:hidden}.theme-list article{display:grid;grid-template-columns:220px 1fr;gap:18px;padding:18px 20px;background:var(--paper);border-bottom:1px solid var(--line)}.theme-list article:last-child{border-bottom:0}.theme-list h2{margin:0}.product-story{display:grid;grid-template-columns:1.2fr .8fr;gap:18px;align-items:start}.product-copy{padding:22px}.feature-ledger{display:grid;gap:10px}.feature-ledger article{padding:16px;background:var(--sub);border:1px solid var(--line);border-radius:9px}.install-flow{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.install-flow article{padding:20px;background:var(--paper);border:1px solid var(--line);border-radius:10px}.policy-sections{display:grid;gap:14px}.policy-sections section{padding:20px;background:var(--paper);border:1px solid var(--line);border-radius:10px}.help-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.help-grid article{padding:20px;background:var(--paper);border:1px solid var(--line);border-radius:10px}.help-grid .btn-row{margin-top:12px}.faq-list{display:grid;gap:10px}.faq-list details{background:var(--paper);border:1px solid var(--line);border-radius:10px;padding:15px 18px}.faq-list summary{font-weight:800;color:var(--ink);cursor:pointer}.faq-list p{margin:10px 0 0}.contact-route{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.contact-route article{padding:20px;background:var(--paper);border:1px solid var(--line);border-radius:10px}.about-ledger{display:grid;grid-template-columns:220px 1fr;gap:18px}.about-ledger nav{display:grid;gap:8px;align-content:start;position:sticky;top:132px}.about-ledger nav a{padding:10px 12px;background:var(--warm);border:1px solid var(--line);border-radius:8px}.about-ledger .policy-sections{min-width:0}
.site-footer{margin-top:48px;background:#2A2824;color:#E8E4DC;border-top:1px solid rgba(200,194,182,.22);font-size:13px;padding:34px 0 76px}.footer-inner{width:min(calc(100% - 32px),var(--max));margin:auto}.footer-brand{display:flex;gap:12px;align-items:center;margin-bottom:24px}.footer-brand>div{display:grid}.footer-brand span{color:#C8C2B6}.footer-links{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;padding:20px 0;border-top:1px solid rgba(200,194,182,.16);border-bottom:1px solid rgba(200,194,182,.16)}.footer-links h2{font-size:13px;color:#F7F3EB;margin-bottom:8px}.footer-links a{display:block;color:#E8E4DC;padding:3px 0}.footer-links a:hover{text-decoration:underline}.footer-note{max-width:820px;color:#D6D0C6;margin:18px 0 8px}.footer-copy{margin:0;color:#C8C2B6}
.rock-drawer{position:fixed;z-index:130;left:0;top:0;bottom:0;width:380px;max-width:88vw;background:var(--warm);color:var(--deep-rock);transform:translateX(-104%);visibility:hidden;pointer-events:none;transition:transform .22s ease,visibility .22s ease;overflow-y:auto}.rock-drawer.is-open{transform:translateX(0);visibility:visible;pointer-events:auto}.drawer-head{position:sticky;top:0;z-index:2;display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px 16px;background:var(--deep-bg);border-bottom:1px solid var(--line)}.drawer-brand{display:flex;align-items:center;gap:10px}.icon-close{min-height:44px;padding:0 12px;border:1px solid var(--line);background:var(--warm);color:var(--deep-rock);border-radius:8px}.drawer-groups{padding:14px}.drawer-groups section{margin-bottom:18px}.drawer-groups h2{font-size:13px;color:var(--clay);margin:0 0 7px}.drawer-groups a{display:grid;gap:1px;padding:9px 10px;border-radius:8px}.drawer-groups a:hover{background:var(--sub)}.drawer-groups b{font-size:14px}.drawer-groups span{font-size:12px;color:var(--muted);line-height:1.5}
.site-search{position:fixed;z-index:125;left:0;right:0;top:78px;visibility:hidden;pointer-events:none;transform:translateY(-12px);opacity:0;transition:.2s ease}.site-search.is-open{visibility:visible;pointer-events:auto;transform:translateY(0);opacity:1}.search-card{width:min(calc(100% - 32px),760px);margin:12px auto;background:var(--deep-bg);border:1px solid var(--line);border-radius:12px;padding:18px;box-shadow:var(--shadow)}.search-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}.search-card label{display:block;margin-bottom:7px;font-weight:700;color:var(--ink)}.search-card input{width:100%;min-height:44px;border:1px solid var(--line);background:var(--warm);color:var(--deep-rock);border-radius:9px;padding:0 12px}.search-presets{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}.search-presets a{min-height:44px;padding:0 14px;display:inline-flex;align-items:center;border-radius:9px;background:var(--paper);border:1px solid var(--line)}.search-empty{margin:10px 0 0;color:var(--muted)}
.site-overlay{position:fixed;z-index:120;inset:0;background:rgba(42,40,36,.45);opacity:0;visibility:hidden;pointer-events:none;transition:.2s ease}.site-overlay.is-open{opacity:1;visibility:visible;pointer-events:auto}.mobile-bottom{display:none}

.mt-12{margin-top:12px}.mt-14{margin-top:14px}.mt-16{margin-top:16px}.mt-18{margin-top:18px}.prose-panel{padding:20px}.pad-24{padding:24px}.app-icon-wrap{margin-top:12px;width:48px}
@media (max-width:760px){
  .rock-tabs{display:none}.site-main{padding-top:78px}.page-hero{padding-top:34px}.home-duo,.note-columns,.method-steps,.product-story,.help-grid,.contact-route,.home-tail{grid-template-columns:1fr}.shelf-grid{grid-template-columns:1fr 1fr}.process-track{grid-template-columns:1fr}.observe-directory article,.theme-list article,.about-ledger{grid-template-columns:1fr}.card-wall{grid-template-columns:1fr}.card-wall article:nth-child(3n){grid-column:auto}.install-flow{grid-template-columns:1fr}.about-ledger nav{position:static;grid-template-columns:1fr 1fr}.footer-links{grid-template-columns:1fr 1fr}.site-footer{padding-bottom:calc(78px + env(safe-area-inset-bottom))}.mobile-bottom{position:fixed;z-index:90;left:0;right:0;bottom:0;height:calc(48px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);background:var(--warm);border-top:1px solid var(--line);display:grid;grid-template-columns:repeat(5,1fr)}.mobile-bottom a{display:flex;align-items:center;justify-content:center;min-width:0;font-size:12px;color:var(--deep-rock)}.mobile-bottom a.is-current{background:var(--clay);color:var(--warm)}
  .site-search{top:0;bottom:0;background:var(--deep-rock);color:var(--warm);overflow-y:auto}.search-card{width:100%;min-height:100%;margin:0;border:0;border-radius:0;background:var(--deep-rock);padding:24px 16px}.search-card label,.search-head strong{color:var(--warm)}.search-card .icon-close{background:var(--warm)}.search-presets a{background:transparent;color:var(--warm);border-color:rgba(247,243,235,.25)}.search-empty{color:var(--light-rock)}.stone-line-inner,.rock-bar-inner{padding:0 16px}.drawer-btn,.app-link{padding:0 12px}.brand-logo{max-width:150px}.shelf-grid article{min-height:132px}.app-visual{grid-template-columns:1fr 58px}.page-hero .media-220{height:180px}
}
@media (max-width:430px){.footer-links,.shelf-grid,.about-ledger nav{grid-template-columns:1fr}.rock-actions{gap:6px}.drawer-btn,.app-link{padding:0 10px}.numbered-strips article{grid-template-columns:46px 1fr;padding:14px}.container{width:calc(100% - 32px)}}