:root{
  --bg:#E8E4DC;--deep-bg:#D6D0C6;--panel:#F6F3ED;--sub:#EFEBE3;--title:#2C2A26;--text:#3A372F;
  --muted:#6B675E;--soft:#8A8478;--rock:#6B675E;--deep-rock:#3E3B36;--light-rock:#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);--max:1080px;--radius:10px;
}
*{box-sizing:border-box}html{scroll-behavior:smooth;overflow-x:hidden}body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",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{display:block;max-width:100%;height:auto;object-fit:contain;object-position:center}.site-header{position:fixed;inset:0 0 auto 0;z-index:80}.stone-line{height:22px;background:var(--deep-rock);color:var(--warm);font-size:12px}.top-inner,.rock-inner,.tabs-inner{max-width:var(--max);margin:0 auto;padding:0 20px}.top-inner{height:22px;display:flex;align-items:center;justify-content:space-between;gap:12px}.text-search{height:22px;border:0;background:transparent;color:var(--warm);padding:0 4px}.rock-bar{height:56px;background:var(--deep-bg);border-bottom:1px solid var(--border)}.rock-inner{height:56px;display:flex;align-items:center;justify-content:space-between}.brand-link{min-height:44px;display:flex;align-items:center}.brand-image-slot{display:flex;align-items:center;min-width:126px}.brand-logo,.drawer-logo,.footer-logo{height:26px;width:auto}.brand-fallback{font-size:16px;font-weight:700;color:var(--deep-rock)}.rock-actions{display:flex;gap:8px;align-items:center}.rock-drawer-button,.app-quick,.btn-primary,.btn-secondary,.search-head button,.drawer-head button{min-height:42px;border-radius:9px;padding:0 16px;display:inline-flex;align-items:center;justify-content:center;font-size:14px;white-space:nowrap}.rock-drawer-button{border:1px solid var(--border);background:var(--warm);color:var(--deep-rock)}.app-quick,.btn-primary{background:linear-gradient(135deg,#8A8478 0%,#6B675E 55%,#3E3B36 100%);color:var(--warm);border:1px solid var(--deep-rock)}.btn-secondary{background:var(--warm);color:var(--deep-rock);border:1px solid var(--clay)}.rock-tabs{height:38px;background:var(--warm);border-bottom:1px solid var(--border)}.tabs-inner{height:38px;display:flex;justify-content:center;align-items:stretch;gap:6px}.tabs-inner a{display:flex;align-items:center;padding:0 18px;font-size:13px;color:var(--deep-rock)}.tabs-inner a.is-active{background:var(--deep-rock);color:var(--warm)}.site-main{padding-top:116px;min-height:70vh}.wrap{max-width:var(--max);margin:0 auto;padding:34px 20px 48px}.hero-copy{max-width:780px}.eyebrow{font-size:12px;letter-spacing:.14em;color:var(--clay);font-weight:700}.hero-copy h1,.page-head h1{font-size:24px;line-height:1.3;margin:8px 0 14px;color:var(--title)}.hero-copy p,.page-head p{margin:0 0 18px}.lead{font-size:16px;color:var(--deep-rock)}h2{font-size:20px;line-height:1.4;color:var(--title);margin:0 0 12px}h3{font-size:16px;line-height:1.45;color:var(--title);margin:0 0 8px}p{margin:0 0 12px}.page-head{max-width:820px;margin-bottom:26px}.page-head .image-slot{margin-top:20px}.image-slot{background:var(--sub);border:1px solid var(--border);border-radius:var(--radius);display:flex;align-items:center;justify-content:center;overflow:hidden}.slot-168{height:168px}.slot-190{height:190px}.slot-220{height:220px}.slot-300{height:300px}.slot-340{height:340px}.image-slot img{width:100%;height:100%;object-fit:contain}.button-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}.section{margin-top:34px}.section-title{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:14px}.section-title p{margin:0;color:var(--muted);max-width:600px}.home-intro{background:linear-gradient(180deg,var(--panel),var(--bg));border-bottom:1px solid var(--border)}.home-intro .wrap{padding-top:42px;padding-bottom:38px}.duo-feature{display:grid;grid-template-columns:1fr 1fr;gap:18px}.feature-block{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);padding:16px;box-shadow:var(--shadow)}.feature-block .image-slot{margin-bottom:14px}.letter-strips{display:grid;gap:10px}.letter-strip{display:grid;grid-template-columns:52px 1fr;gap:14px;align-items:start;background:var(--panel);border:1px solid var(--border);border-left:3px solid var(--clay);border-radius:9px;padding:16px}.letter-mark{width:40px;height:40px;border-radius:50%;background:var(--deep-rock);color:var(--warm);display:flex;align-items:center;justify-content:center;font-weight:700}.note-columns{display:grid;grid-template-columns:1fr 1fr;gap:16px}.note-card{background:var(--warm);border:1px solid var(--border);border-radius:10px;padding:18px}.note-card ul,.content-block ul,.method-list,.memo-list{padding-left:20px;margin:10px 0 0}.shelf-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}.shelf-cell{background:var(--deep-bg);border:1px solid var(--border);min-height:150px;padding:18px;border-radius:10px;display:flex;flex-direction:column;justify-content:space-between}.shelf-cell b{color:var(--deep-rock)}.sequence-row{display:grid;grid-template-columns:repeat(5,1fr);gap:9px}.sequence-item{background:var(--panel);border-top:3px solid var(--moss);padding:16px;border-radius:0 0 10px 10px}.timeline-horizontal{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;position:relative;margin-top:18px}.timeline-horizontal:before{content:"";position:absolute;left:4%;right:4%;top:23px;height:1px;background:var(--light-rock)}.timeline-node{position:relative;padding-top:52px}.timeline-node:before{content:"";position:absolute;top:14px;left:14px;width:18px;height:18px;background:var(--panel);border:5px solid var(--rock);border-radius:50%;z-index:1}.status-chip{display:inline-block;font-size:12px;padding:3px 9px;border-radius:999px;background:var(--deep-rock);color:var(--warm);margin-bottom:8px}.app-stack{background:var(--panel);border:1px solid var(--border);border-radius:12px;padding:22px}.app-art{margin-top:18px;display:grid;grid-template-columns:1fr 74px;gap:14px;align-items:end}.app-icon-slot{height:74px;background:var(--sub);border:1px solid var(--border);border-radius:14px;display:flex;align-items:center;justify-content:center}.app-icon-slot img{width:48px;height:48px}.reading-points{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.reading-point{background:var(--sub);border-left:4px solid var(--moss);padding:16px;border-radius:0 9px 9px 0}.faq-mini{display:grid;gap:10px}.faq-mini details{background:var(--panel);border:1px solid var(--border);border-radius:9px;padding:12px 14px}.faq-mini summary{font-weight:700;color:var(--deep-rock);cursor:pointer}.brand-story{background:var(--deep-rock);color:var(--warm);border-radius:12px;padding:24px}.brand-story h2,.brand-story h3{color:var(--warm)}.brand-story p{color:#F6F3ED}.content-block{background:var(--panel);border:1px solid var(--border);border-radius:10px;padding:20px;margin-bottom:14px}.observer-directory{display:grid;grid-template-columns:190px 1fr;gap:18px}.observer-index{background:var(--deep-rock);color:var(--warm);padding:18px;border-radius:10px;align-self:start;position:sticky;top:132px}.observer-index a{display:block;padding:8px 0;border-bottom:1px solid rgba(247,243,235,.16)}.observer-main{display:grid;gap:14px}.observer-main article{background:var(--panel);border:1px solid var(--border);border-radius:10px;padding:20px}.card-wall{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.wall-card{background:var(--panel);border:1px solid var(--border);border-radius:10px;padding:18px}.wall-card.wide{grid-column:1/-1;background:var(--deep-bg)}.memo-board{display:grid;grid-template-columns:1fr 1fr;gap:18px}.memo-column{display:grid;gap:12px}.memo-paper{background:var(--warm);border:1px solid var(--border);border-top:3px solid var(--clay);padding:18px;border-radius:8px}.alphabet-line{display:grid;grid-template-columns:76px 1fr;gap:18px;align-items:start;border-bottom:1px solid var(--border);padding:18px 0}.alphabet-line .big-char{font-size:38px;line-height:1;color:var(--rock);font-weight:800}.memo-list{list-style:none;padding:0}.memo-list li{background:var(--panel);border:1px solid var(--border);border-radius:9px;padding:16px 18px;margin-bottom:10px}.method-steps{counter-reset:step;display:grid;gap:14px}.method-step{counter-increment:step;position:relative;background:var(--panel);padding:18px 18px 18px 64px;border-radius:10px;border:1px solid var(--border)}.method-step:before{content:counter(step, cjk-ideographic);position:absolute;left:18px;top:16px;width:32px;height:32px;border-radius:50%;background:var(--deep-rock);color:var(--warm);display:flex;align-items:center;justify-content:center}.theme-list{display:grid;gap:12px}.theme-row{display:grid;grid-template-columns:180px 1fr;gap:18px;background:var(--panel);border:1px solid var(--border);padding:18px;border-radius:10px}.theme-row strong{color:var(--clay)}.cabinet{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.cabinet article{background:var(--deep-bg);border:1px solid var(--border);border-radius:10px;padding:18px;min-height:185px}.cabinet article:nth-child(2n){background:var(--panel)}.product-hero{display:grid;grid-template-columns:1fr .72fr;gap:24px;align-items:start}.product-copy{background:var(--panel);padding:22px;border-radius:12px;border:1px solid var(--border)}.product-features{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.feature-chip{background:var(--sub);border:1px solid var(--border);padding:16px;border-radius:10px}.clause-stack{display:grid;gap:12px}.clause{background:var(--panel);border-left:4px solid var(--rock);padding:18px 20px;border-radius:0 10px 10px 0}.clause:nth-child(3n){border-left-color:var(--clay)}.help-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.help-grid article{background:var(--panel);border:1px solid var(--border);border-radius:10px;padding:18px}.faq-full{display:grid;gap:12px}.faq-item{background:var(--panel);border:1px solid var(--border);border-radius:10px;padding:18px}.faq-item h2{font-size:16px}.contact-paths{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.contact-card{background:var(--panel);border:1px solid var(--border);border-radius:10px;padding:20px}.about-declaration{display:grid;grid-template-columns:1.2fr .8fr;gap:18px}.declaration-main,.declaration-side{background:var(--panel);border:1px solid var(--border);border-radius:10px;padding:20px}.site-footer{background:#2A2824;color:#E8E4DC;border-top:1px solid #C8C2B6;padding-bottom:18px}.footer-inner{max-width:var(--max);margin:0 auto;padding:32px 20px 22px}.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:22px}.footer-brand span{display:block;font-size:12px;color:#C8C2B6}.footer-columns{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.footer-columns h2{font-size:13px;color:#F7F3EB;margin-bottom:8px}.footer-columns a{display:block;font-size:13px;color:#E8E4DC;padding:3px 0}.footer-note,.copyright{font-size:13px;color:#D6D0C6}.footer-note{margin-top:22px;padding-top:18px;border-top:1px solid rgba(232,228,220,.16)}.ui-overlay{position:fixed;inset:0;background:rgba(42,40,36,.46);z-index:90;opacity:0;visibility:hidden;pointer-events:none;transition:.2s}.ui-overlay.is-visible{opacity:1;visibility:visible;pointer-events:auto}.rock-drawer{position:fixed;left:0;top:0;bottom:0;width:380px;max-width:88vw;background:var(--warm);z-index:110;transform:translateX(-102%);visibility:hidden;pointer-events:none;transition:.25s;box-shadow:var(--shadow)}.drawer-open .rock-drawer{transform:translateX(0);visibility:visible;pointer-events:auto}.drawer-head{height:70px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;padding:0 16px}.drawer-brand{display:flex;align-items:center;gap:10px;font-weight:700;color:var(--deep-rock)}.drawer-head button,.search-head button{border:1px solid var(--border);background:var(--panel);color:var(--deep-rock)}.drawer-scroll{height:calc(100vh - 70px);overflow-y:auto;padding:12px 16px 34px}.drawer-scroll section{margin-bottom:18px}.drawer-scroll section h2{font-size:13px;color:var(--clay);margin-bottom:6px}.drawer-scroll a{display:block;border-bottom:1px solid var(--border);padding:10px 0}.drawer-scroll b{display:block;font-size:14px}.drawer-scroll span{display:block;font-size:12px;color:var(--muted);margin-top:2px}.site-search{position:fixed;left:0;right:0;top:78px;z-index:105;visibility:hidden;opacity:0;pointer-events:none;transition:.2s}.search-open .site-search{visibility:visible;opacity:1;pointer-events:auto}.search-panel{max-width:760px;margin:0 auto;background:var(--deep-bg);border:1px solid var(--border);border-radius:0 0 12px 12px;box-shadow:var(--shadow);padding:18px 20px}.search-head{display:flex;align-items:center;justify-content:space-between}.search-panel label{display:block;font-size:13px;color:var(--deep-rock);margin:12px 0 6px}.search-panel input{width:100%;height:44px;border:1px solid var(--border);background:var(--warm);color:var(--deep-rock);border-radius:8px;padding:0 12px}.search-presets{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}.search-presets a{display:inline-flex;align-items:center;min-height:40px;padding:0 14px;border-radius:999px;background:var(--warm);border:1px solid var(--border);font-size:13px}.mobile-bottom{display:none}a:hover,.rock-drawer-button:hover,.text-search:hover,.search-head button:hover,.drawer-head button:hover{filter:brightness(.97)}a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid rgba(166,90,58,.38);outline-offset:2px}
@media (max-width:800px){
  .top-inner,.rock-inner,.wrap,.footer-inner{padding-left:16px;padding-right:16px}.rock-tabs{display:none}.site-main{padding-top:78px;padding-bottom:calc(58px + env(safe-area-inset-bottom))}.stone-line,.top-inner{height:22px}.rock-actions{gap:6px}.rock-drawer-button,.app-quick{padding:0 11px;min-height:44px}.brand-image-slot{min-width:0;max-width:140px}.duo-feature,.note-columns,.reading-points,.memo-board,.help-grid,.contact-paths,.about-declaration,.product-hero{grid-template-columns:1fr}.shelf-grid{grid-template-columns:1fr 1fr}.sequence-row{grid-template-columns:1fr 1fr}.sequence-item:last-child{grid-column:1/-1}.timeline-horizontal{grid-template-columns:1fr;gap:10px}.timeline-horizontal:before{top:0;bottom:0;left:23px;width:1px;height:auto}.timeline-node{padding:4px 0 12px 58px}.timeline-node:before{top:7px;left:14px}.observer-directory{grid-template-columns:1fr}.observer-index{position:static}.card-wall{grid-template-columns:1fr}.wall-card.wide{grid-column:auto}.theme-row{grid-template-columns:1fr;gap:8px}.cabinet{grid-template-columns:1fr 1fr}.product-features{grid-template-columns:1fr}.footer-columns{grid-template-columns:1fr 1fr}.site-search{top:0;bottom:0;background:var(--deep-rock)}.search-panel{max-width:none;height:100%;border:0;border-radius:0;background:var(--deep-rock);color:var(--warm);padding:20px 16px}.search-head strong,.search-panel label{color:var(--warm)}.search-head button{background:var(--warm)}.search-panel input{background:var(--warm);color:var(--deep-rock)}.mobile-bottom{display:grid;grid-template-columns:repeat(5,1fr);position:fixed;left:0;right:0;bottom:0;z-index:70;height:calc(48px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);background:var(--warm);border-top:1px solid var(--border)}.mobile-bottom a{display:flex;align-items:center;justify-content:center;font-size:12px;min-height:48px}.mobile-bottom a.is-active{background:var(--clay);color:var(--warm)}
}
@media (max-width:520px){.shelf-grid,.cabinet,.footer-columns{grid-template-columns:1fr}.app-art{grid-template-columns:1fr}.app-icon-slot{width:74px}.alphabet-line{grid-template-columns:54px 1fr}.letter-strip{grid-template-columns:46px 1fr}.hero-copy h1,.page-head h1{font-size:24px}.wrap{padding-top:26px}.section{margin-top:28px}}