:root{
  --stone:#E8E4DC;--deep:#D6D0C6;--paper:#F6F3ED;--sub:#EFEBE3;--ink:#2C2A26;--text:#3A372F;--muted:#6B675E;--soft:#8A8478;--rock:#6B675E;--dark:#3E3B36;--light:#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(--stone);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;padding-top:116px}body.locked{overflow:hidden}a{color:inherit;text-decoration:none}img{max-width:100%;height:auto;display:block;object-fit:contain;object-position:center}button,input{font:inherit}.skip-link{position:fixed;left:12px;top:-60px;z-index:1200;background:var(--dark);color:var(--warm);padding:8px 12px;border-radius:8px}.skip-link:focus{top:8px}.stone-line,.rock-bar{position:fixed;left:0;right:0;z-index:800}.stone-line{top:0;height:22px;background:var(--dark);color:var(--warm);font-size:12px}.top-inner{max-width:var(--max);margin:auto;height:100%;padding:0 20px;display:flex;align-items:center;justify-content:space-between;gap:14px}.text-tool{background:none;border:0;color:var(--warm);padding:0 8px;height:22px;cursor:pointer}.rock-bar{top:22px;height:56px;background:var(--deep);border-bottom:1px solid var(--line)}.rock-inner{height:56px}.brand{display:flex;align-items:center;min-width:0;height:44px;font-size:16px;font-weight:800;letter-spacing:.02em}.brand-image-slot{height:26px;display:flex;align-items:center}.brand-image-slot img{height:26px;width:auto}.brand-image-slot:has(img)+.brand-fallback{display:none}.bar-actions{display:flex;gap:8px;align-items:center}.rock-drawer-button,.app-link,.primary-btn,.secondary-btn{min-height:44px;border-radius:9px;padding:0 16px;display:inline-flex;align-items:center;justify-content:center;font-size:14px;font-weight:700;white-space:nowrap}.rock-drawer-button{border:1px solid var(--line);background:var(--paper);color:var(--dark);cursor:pointer}.app-link,.primary-btn{border:0;background:linear-gradient(135deg,#8A8478 0%,#6B675E 55%,#3E3B36 100%);color:var(--warm)}.secondary-btn{background:var(--warm);border:1px solid var(--clay);color:var(--dark)}.rock-tabs{position:fixed;z-index:790;top:78px;left:0;right:0;height:38px;background:var(--warm);border-bottom:1px solid var(--line)}.tabs-inner{max-width:var(--max);margin:auto;height:38px;display:flex;justify-content:center;align-items:center;gap:6px}.tabs-inner a{height:30px;min-width:76px;padding:0 14px;display:flex;align-items:center;justify-content:center;font-size:13px;border-radius:7px}.tabs-inner a.is-active{background:var(--dark);color:var(--warm)}.site-main{min-height:62vh}.container{max-width:var(--max);margin:0 auto;padding:34px 20px}.section{margin:0 0 32px}.surface{background:var(--paper);border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow)}.surface.soft{background:var(--sub);box-shadow:none}.eyebrow{font-size:12px;color:var(--clay);font-weight:800;letter-spacing:.15em;margin:0 0 6px}.hero-copy{padding:30px}.hero-copy h1,.page-head h1{font-size:24px;line-height:1.3;color:var(--ink);margin:0 0 12px}.hero-copy p,.page-head p{max-width:760px;margin:0 0 20px}.lede{font-size:16px;color:var(--dark)}h2{font-size:20px;line-height:1.35;color:var(--ink);margin:0 0 14px}h3{font-size:16px;line-height:1.45;color:var(--ink);margin:0 0 8px}p{margin:0 0 12px}.section-head{display:flex;align-items:end;justify-content:space-between;gap:16px;margin-bottom:14px}.section-head p{max-width:650px;color:var(--muted);margin:0}.image-slot{background:var(--sub);border:1px solid var(--line);border-radius:10px;display:flex;align-items:center;justify-content:center;overflow:hidden}.image-slot:empty:after{content:"";width:42%;height:42%;border:1px dashed var(--light);border-radius:9px}.image-168{height:168px}.image-190{height:190px}.image-220{height:220px}.image-app{height:320px}.image-slot img{width:100%;height:100%;object-fit:contain}.dual-feature{display:grid;grid-template-columns:1fr 1fr;gap:18px}.feature-card{padding:16px}.feature-card .image-slot{margin-bottom:14px}.number-strips{display:grid;gap:10px}.number-strip{display:grid;grid-template-columns:58px 1fr auto;gap:14px;align-items:center;background:var(--paper);border:1px solid var(--line);padding:14px;border-radius:10px}.number-strip .cn-num{font-family:serif;font-size:24px;color:var(--clay);text-align:center}.number-strip p{margin:0;color:var(--muted)}.note-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}.note-card{padding:18px;background:var(--paper);border-left:3px solid var(--moss);border-radius:8px}.shelf-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:11px;overflow:hidden}.shelf-grid article{background:var(--warm);padding:18px;min-height:150px}.letter-row{display:flex;gap:10px;overflow-x:auto;padding:2px 0 8px;scrollbar-width:thin}.letter-card{min-width:190px;flex:1;background:var(--paper);border:1px solid var(--line);border-radius:10px;padding:16px}.letter-card b{display:inline-flex;width:32px;height:32px;border-radius:50%;align-items:center;justify-content:center;background:var(--dark);color:var(--warm);margin-bottom:10px}.status-track{display:grid;grid-template-columns:repeat(4,1fr);gap:0}.status-node{position:relative;padding:40px 14px 12px;border-top:2px solid var(--light)}.status-node:before{content:"";position:absolute;top:-7px;left:14px;width:12px;height:12px;border-radius:50%;background:var(--clay);border:3px solid var(--stone)}.status-node span{display:inline-block;font-size:12px;padding:3px 8px;border-radius:999px;background:var(--deep);color:var(--dark);margin-bottom:7px}.app-block{padding:22px}.app-block .app-copy{max-width:800px;margin-bottom:18px}.app-visuals{display:grid;grid-template-columns:minmax(0,1fr) 90px;gap:14px;align-items:center;max-width:620px}.app-icon-slot{height:90px;background:var(--warm);border:1px solid var(--line);border-radius:12px;display:flex;align-items:center;justify-content:center}.app-icon-slot img{width:48px;height:48px}.reading-points{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.point{padding:16px;background:var(--sub);border-radius:9px;border:1px solid var(--line)}.faq-mini{display:grid;grid-template-columns:1fr 1fr;gap:10px}.faq-mini details,.faq-list details{background:var(--paper);border:1px solid var(--line);border-radius:9px;padding:13px 15px}.faq-mini summary,.faq-list summary{cursor:pointer;font-weight:800;color:var(--ink)}.brand-story{display:grid;grid-template-columns:1.2fr .8fr;gap:18px;align-items:stretch}.brand-story.single{grid-template-columns:1fr}.brand-story .copy{padding:22px}.brand-mark{min-height:220px}.page-head{margin-bottom:24px;padding:26px;background:var(--paper);border:1px solid var(--line);border-radius:12px}.page-head.with-banner{display:grid;grid-template-columns:1fr 38%;gap:18px;align-items:center}.page-head .image-slot{height:220px}.observation-directory{display:grid;grid-template-columns:180px 1fr;gap:14px}.observation-directory nav{background:var(--dark);color:var(--warm);border-radius:10px;padding:12px}.observation-directory nav a{display:block;padding:11px;border-bottom:1px solid rgba(247,243,235,.12)}.observation-copy{display:grid;gap:12px}.observation-copy article{padding:18px;background:var(--paper);border:1px solid var(--line);border-radius:10px}.card-wall{columns:3 260px;column-gap:14px}.wall-card{break-inside:avoid;margin:0 0 14px;padding:18px;background:var(--paper);border:1px solid var(--line);border-radius:10px}.memo-columns{display:grid;grid-template-columns:1fr 1fr;gap:16px}.memo-column{padding:18px;background:var(--paper);border:1px solid var(--line);border-radius:10px}.memo-item{padding:13px 0;border-bottom:1px solid var(--line)}.memo-item:last-child{border-bottom:0}.letter-list{display:grid;gap:10px}.letter-list article{display:grid;grid-template-columns:54px 1fr;gap:14px;align-items:start;background:var(--paper);border:1px solid var(--line);border-radius:10px;padding:15px}.letter-list strong{width:42px;height:42px;border-radius:50%;display:grid;place-items:center;background:var(--dark);color:var(--warm);font-size:18px}.timeline{display:flex;gap:0;overflow-x:auto;padding:20px 0 8px}.timeline article{min-width:220px;flex:1;padding:24px 14px 14px;border-top:2px solid var(--light);position:relative}.timeline article:before{content:"";position:absolute;top:-8px;left:14px;width:13px;height:13px;border-radius:50%;background:var(--moss);border:3px solid var(--stone)}.checklist{display:grid;gap:10px}.checklist article{display:grid;grid-template-columns:34px 1fr;gap:12px;padding:15px;background:var(--paper);border:1px solid var(--line);border-radius:9px}.checkmark{width:28px;height:28px;border-radius:7px;background:var(--moss);color:var(--warm);display:grid;place-items:center;font-weight:800}.method-steps{counter-reset:step;display:grid;gap:12px}.method-steps article{counter-increment:step;position:relative;padding:18px 18px 18px 64px;background:var(--paper);border:1px solid var(--line);border-radius:10px}.method-steps article:before{content:counter(step, cjk-ideographic);position:absolute;left:16px;top:16px;width:34px;height:34px;border-radius:50%;display:grid;place-items:center;background:var(--clay);color:var(--warm);font-weight:800}.theme-list{display:grid;gap:1px;background:var(--line);border:1px solid var(--line);border-radius:10px;overflow:hidden}.theme-list article{background:var(--paper);display:grid;grid-template-columns:180px 1fr;gap:16px;padding:18px}.theme-list article b{color:var(--clay)}.shelf-page{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.shelf-page section{background:var(--warm);border:1px solid var(--line);border-radius:10px;overflow:hidden}.shelf-page h2{font-size:16px;background:var(--dark);color:var(--warm);padding:12px 14px;margin:0}.shelf-page article{padding:14px;border-bottom:1px solid var(--line)}.shelf-page article:last-child{border-bottom:0}.product-panel{display:grid;grid-template-columns:1.2fr .8fr;gap:18px}.product-copy,.product-aside{padding:20px;background:var(--paper);border:1px solid var(--line);border-radius:10px}.info-sections{display:grid;gap:12px}.info-sections section{background:var(--paper);border:1px solid var(--line);border-radius:10px;padding:18px}.policy-sections{display:grid;gap:12px}.policy-sections section{background:var(--paper);border-left:4px solid var(--clay);padding:18px;border-radius:8px}.help-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.help-grid article{padding:18px;background:var(--paper);border:1px solid var(--line);border-radius:10px}.contact-lanes{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.contact-lanes article{padding:18px;background:var(--paper);border:1px solid var(--line);border-radius:10px}.notice{background:var(--sub);border:1px solid var(--accent-line);border-radius:9px;padding:15px}.site-footer{background:#2A2824;color:#E8E4DC;border-top:1px solid #C8C2B6;margin-top:38px}.footer-inner{max-width:var(--max);margin:auto;padding:28px 20px 78px}.footer-brand{display:flex;gap:12px;align-items:center;margin-bottom:20px}.footer-logo-slot{height:26px;display:flex;align-items:center}.footer-logo-slot img{height:26px}.footer-brand strong{display:block;font-size:16px}.footer-brand span{font-size:12px;color:#C8C2B6}.footer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.footer-grid h2{font-size:13px;color:#F7F3EB;margin:0 0 8px}.footer-grid a{display:block;font-size:13px;color:#E8E4DC;padding:3px 0}.footer-note,.copyright{font-size:13px;color:#C8C2B6}.footer-note{margin-top:20px;padding-top:16px;border-top:1px solid rgba(200,194,182,.18)}.overlay{position:fixed;inset:0;z-index:900;background:rgba(42,40,36,.46);opacity:0;pointer-events:none;transition:.18s}.overlay.is-visible{opacity:1;pointer-events:auto}.rock-drawer{position:fixed;z-index:920;left:0;top:0;bottom:0;width:380px;max-width:88vw;background:var(--paper);transform:translateX(-102%);transition:.22s;visibility:hidden;pointer-events:none;overflow:auto;box-shadow:var(--shadow)}.rock-drawer.is-open{transform:none;visibility:visible;pointer-events:auto}.drawer-head{position:sticky;top:0;background:var(--deep);padding:12px 14px;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line);z-index:2}.drawer-brand{display:flex;gap:9px;align-items:center}.drawer-logo-slot{height:26px}.drawer-logo-slot img{height:26px}.drawer-close,.search-head button{min-height:44px;border:1px solid var(--line);background:var(--warm);color:var(--dark);border-radius:8px;padding:0 12px;cursor:pointer}.drawer-groups{padding:12px 14px 26px}.drawer-groups section{margin-bottom:18px}.drawer-groups h2{font-size:13px;color:var(--clay);margin-bottom:6px}.drawer-groups a{display:block;border-bottom:1px solid var(--line);padding:10px 2px}.drawer-groups b{display:block;font-size:14px}.drawer-groups span{display:block;color:var(--muted);font-size:12px;margin-top:2px}.search-layer{position:fixed;z-index:910;left:0;right:0;top:78px;visibility:hidden;pointer-events:none;transform:translateY(-10px);opacity:0;transition:.18s}.search-layer.is-open{visibility:visible;pointer-events:auto;transform:none;opacity:1}.search-card{max-width:var(--max);margin:auto;background:var(--sub);border:1px solid var(--line);border-radius:0 0 12px 12px;padding:18px 20px;box-shadow:var(--shadow)}.search-head{display:flex;justify-content:space-between;align-items:center;gap:12px}.search-links{display:flex;flex-wrap:wrap;gap:8px}.search-links a{min-height:44px;padding:0 14px;border:1px solid var(--line);border-radius:8px;background:var(--warm);display:flex;align-items:center}.mobile-bottom{display:none}.site-main a:focus-visible,.site-footer a:focus-visible,button:focus-visible,.mobile-bottom a:focus-visible{outline:3px solid rgba(166,90,58,.5);outline-offset:2px}.primary-btn:hover,.app-link:hover{filter:brightness(.94)}.secondary-btn:hover,.rock-drawer-button:hover{background:#fffaf1}
@media(max-width:760px){body{padding-top:78px;padding-bottom:calc(48px + env(safe-area-inset-bottom))}.top-inner{padding:0 16px}.rock-tabs{display:none}.container{padding:24px 16px}.hero-copy,.page-head{padding:20px}.dual-feature,.note-grid,.reading-points,.faq-mini,.brand-story,.memo-columns,.product-panel,.help-grid,.contact-lanes{grid-template-columns:1fr}.shelf-grid{grid-template-columns:1fr 1fr}.status-track{grid-template-columns:1fr 1fr}.page-head.with-banner{grid-template-columns:1fr}.observation-directory{grid-template-columns:1fr}.observation-directory nav{display:flex;overflow:auto;padding:6px}.observation-directory nav a{white-space:nowrap;border-bottom:0;border-right:1px solid rgba(247,243,235,.12)}.card-wall{columns:1}.theme-list article{grid-template-columns:1fr}.shelf-page{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr 1fr}.mobile-bottom{display:grid;position:fixed;z-index:850;left:0;right:0;bottom:0;height:calc(48px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);grid-template-columns:repeat(5,1fr);background:var(--warm);border-top:1px solid var(--line)}.mobile-bottom a{display:flex;align-items:center;justify-content:center;font-size:12px;min-width:0}.mobile-bottom a.is-active{background:var(--clay);color:var(--warm)}.footer-inner{padding-bottom:74px}.search-layer{inset:0;top:0;background:var(--dark);color:var(--warm);padding:78px 16px 60px}.search-card{background:var(--dark);border:0;box-shadow:none;padding:18px 0}.search-card strong,.search-card p{color:var(--warm)}.search-links a{background:var(--warm);color:var(--dark)}.number-strip{grid-template-columns:46px 1fr}.number-strip>a{grid-column:2}.app-visuals{grid-template-columns:1fr 80px}.image-app{height:300px}}
@media(max-width:440px){.stone-line .top-inner{font-size:11px}.bar-actions{gap:5px}.rock-drawer-button,.app-link{padding:0 10px}.shelf-grid,.status-track{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr 1fr}.app-visuals{grid-template-columns:1fr}.app-icon-slot{width:90px}.page-head .image-slot{height:180px}}

.media-gap-12{margin-bottom:12px}.media-gap-14{margin-bottom:14px}.icon-gap-12{margin-top:12px}.padded-surface{padding:20px}