:root{
  --bg:#E8E4DC;--deep:#D6D0C6;--paper:#F6F3ED;--soft:#EFEBE3;--title:#2C2A26;--text:#3A372F;--muted:#6B675E;--aux:#8A8478;--rock:#6B675E;--rockdeep:#3E3B36;--rocklight:#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
}
*{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",sans-serif;font-size:15px;line-height:1.7;overflow-x:hidden}body.is-locked{overflow:hidden}a{color:inherit;text-decoration:none}button,a{font:inherit}button{cursor:pointer}img{max-width:100%;display:block;object-fit:contain;object-position:center}.stone-line{position:fixed;inset:0 0 auto 0;height:22px;background:var(--rockdeep);color:var(--warm);z-index:120;font-size:12px}.top-inner,.header-inner{max-width:var(--max);margin:0 auto;padding:0 18px;height:100%;display:flex;align-items:center;justify-content:space-between}.top-search{border:0;background:transparent;color:var(--warm);min-height:22px;padding:0 8px}.rock-header{position:fixed;top:22px;left:0;right:0;height:56px;background:var(--deep);border-bottom:1px solid var(--border);z-index:118}.brand{display:flex;align-items:center;min-height:44px;font-size:16px;font-weight:700;color:var(--title)}.logo-inline{height:26px;min-width:0}.logo-inline img{height:26px;width:auto}.brand .logo-inline:has(img)+.brand-fallback{display:none}.header-actions{display:flex;gap:8px;align-items:center}.drawer-open,.app-link,.btn-primary,.btn-secondary,.search-head button,.drawer-head button{min-height:44px;border-radius:9px;padding:0 16px;display:inline-flex;align-items:center;justify-content:center;white-space:nowrap}.drawer-open{background:var(--warm);border:1px solid var(--border);color:var(--rockdeep)}.app-link,.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(--rockdeep);border:1px solid var(--clay)}.rock-tabs{position:fixed;top:78px;left:0;right:0;height:38px;background:var(--warm);border-bottom:1px solid var(--border);z-index:116;display:flex;align-items:center;justify-content:center;gap:8px;font-size:13px}.rock-tabs a{min-width:72px;height:30px;display:flex;align-items:center;justify-content:center;border-radius:7px;color:var(--rockdeep)}.rock-tabs a.is-active{background:var(--rockdeep);color:var(--warm)}.site-main{max-width:var(--max);margin:0 auto;padding:148px 18px 72px}.page-hero{background:var(--paper);border:1px solid var(--border);border-radius:12px;padding:32px;margin-bottom:22px;box-shadow:var(--shadow)}.page-hero.compact{padding:26px}.eyebrow{color:var(--clay);font-size:13px;font-weight:700;letter-spacing:.04em}.page-hero h1,.intro h1{font-size:24px;line-height:1.3;margin:8px 0 12px;color:var(--title)}h2{font-size:20px;line-height:1.4;color:var(--title);margin:0 0 12px}h3{font-size:16px;line-height:1.5;color:var(--title);margin:0 0 8px}p{margin:0 0 12px}.lead{font-size:16px}.muted{color:var(--muted)}.intro{background:linear-gradient(180deg,var(--paper),var(--soft));border:1px solid var(--border);border-radius:12px;padding:34px;box-shadow:var(--shadow);margin-bottom:22px}.intro .slogan{font-size:20px;color:var(--rockdeep);font-weight:700;margin-bottom:10px}.intro .btn-primary{margin-top:8px}.section{margin:22px 0}.section-head{display:flex;justify-content:space-between;gap:14px;align-items:end;margin-bottom:12px}.section-head p{color:var(--muted);max-width:650px}.two-feature{display:grid;grid-template-columns:1fr 1fr;gap:16px}.feature-card,.note-card,.method-card,.term-card,.faq-card,.topic-row,.memo-row,.shelf-cell,.ju-card{background:var(--paper);border:1px solid var(--border);border-radius:10px;box-shadow:var(--shadow)}.feature-card{padding:18px}.image-slot{background:var(--soft);border:1px solid var(--border);border-radius:9px;display:flex;align-items:center;justify-content:center;overflow:hidden}.image-slot img{width:100%;height:100%;object-fit:contain}.slot-168{height:168px}.slot-190{height:190px}.slot-220{height:220px}.slot-300{height:300px}.slot-340{height:340px}.feature-card .image-slot{margin-bottom:14px}.number-strips{display:grid;gap:10px}.number-strip{display:grid;grid-template-columns:64px 1fr;gap:14px;background:var(--paper);border:1px solid var(--border);border-radius:10px;padding:16px}.number-strip .mark{background:var(--rockdeep);color:var(--warm);border-radius:8px;display:flex;align-items:center;justify-content:center;min-height:58px;font-weight:700}.number-strip p{margin:0}.split-notes{display:grid;grid-template-columns:1fr 1fr;gap:16px}.note-column{display:grid;gap:12px}.note-card{padding:18px}.shelf-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}.shelf-cell{padding:16px;min-height:146px;border-top:4px solid var(--rocklight)}.shelf-cell:nth-child(2n){border-top-color:var(--moss)}.shelf-cell:nth-child(3n){border-top-color:var(--clay)}.letter-stack{display:grid;gap:10px}.letter-item{display:grid;grid-template-columns:52px 1fr;gap:14px;align-items:start;padding:16px;background:var(--soft);border-left:4px solid var(--rockdeep);border-radius:0 10px 10px 0}.letter-item .letter{font-weight:800;color:var(--clay)}.timeline{display:flex;gap:12px;overflow-x:auto;padding:4px 0 12px;scrollbar-width:thin}.timeline-node{min-width:210px;background:var(--paper);border:1px solid var(--border);border-radius:10px;padding:16px;position:relative}.timeline-node .status{display:inline-block;background:var(--rockdeep);color:var(--warm);border-radius:999px;padding:3px 9px;font-size:12px;margin-bottom:10px}.timeline-node .status.moss{background:var(--moss)}.timeline-node .status.clay{background:var(--clay)}.app-block{background:var(--rockdeep);color:var(--warm);border-radius:12px;padding:24px}.app-block h2,.app-block h3{color:var(--warm)}.app-block .image-slot{margin-top:18px;background:var(--warm)}.app-icon{width:48px;height:48px;margin:0 auto 10px}.app-icon img{width:48px;height:48px}.reading-points{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.method-card{padding:18px}.mini-faq{display:grid;gap:10px}.mini-faq details{background:var(--paper);border:1px solid var(--border);border-radius:10px;padding:14px 16px}.mini-faq summary{font-weight:700;color:var(--title);cursor:pointer}.brand-statement{background:var(--deep);border-radius:12px;padding:24px;border:1px solid var(--border)}.brand-statement h2{margin-bottom:8px}.observe-list{display:grid;gap:12px}.observe-item{background:var(--paper);border:1px solid var(--border);border-radius:10px;padding:18px;display:grid;grid-template-columns:120px 1fr;gap:18px}.observe-item strong{color:var(--clay)}.ju-wall{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.ju-card{padding:18px;min-height:190px}.memo-list{display:grid;gap:12px}.memo-row{padding:18px;display:grid;grid-template-columns:150px 1fr;gap:18px}.memo-row .label{font-weight:700;color:var(--rockdeep)}.methods{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.topic-list{display:grid;gap:12px}.topic-row{padding:18px;border-left:4px solid var(--moss)}.terms{display:grid;gap:14px}.term-card{padding:20px}.term-card h2{border-bottom:1px solid var(--border);padding-bottom:8px}.faq-grid{display:grid;gap:12px}.faq-card{padding:18px}.contact-paths{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.contact-paths .term-card{min-height:190px}.banner-slot{margin:16px 0}.about-visual{margin-top:16px}.site-footer{background:#2A2824;color:#E8E4DC;border-top:1px solid var(--rocklight);font-size:13px;padding:34px 18px calc(30px + env(safe-area-inset-bottom))}.footer-inner{max-width:var(--max);margin:0 auto}.footer-brand{display:flex;gap:12px;align-items:center;margin-bottom:22px}.footer-brand span{display:block;color:var(--rocklight);margin-top:2px}.footer-logo{height:26px;min-width:26px}.footer-logo img{height:26px;width:auto}.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;padding:4px 0}.footer-note{border-top:1px solid rgba(232,228,220,.18);margin-top:22px;padding-top:18px;color:#D6D0C6}.footer-copy{color:#C8C2B6}.rock-drawer{position:fixed;z-index:150;left:0;top:0;bottom:0;width:380px;max-width:88vw;background:var(--warm);color:var(--rockdeep);transform:translateX(-102%);transition:transform .24s ease,visibility .24s ease;visibility:hidden;pointer-events:none;box-shadow:var(--shadow)}.rock-drawer.is-open{transform:translateX(0);visibility:visible;pointer-events:auto}.drawer-head{height:68px;padding:0 16px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--border);background:var(--deep)}.drawer-brand{display:flex;align-items:center;gap:10px}.drawer-logo{height:26px}.drawer-logo img{height:26px;width:auto}.drawer-head button,.search-head button{background:var(--warm);border:1px solid var(--border);color:var(--rockdeep)}.drawer-scroll{height:calc(100% - 68px);overflow-y:auto;padding:18px}.drawer-scroll section{margin-bottom:18px}.drawer-scroll h2{font-size:13px;color:var(--muted);margin-bottom:6px}.drawer-scroll a{display:block;padding:10px 8px;border-bottom:1px solid var(--border)}.drawer-scroll a span{display:block;font-size:12px;color:var(--muted);margin-top:2px}.search-layer{position:fixed;z-index:145;left:0;right:0;top:78px;visibility:hidden;pointer-events:none;transform:translateY(-8px);opacity:0;transition:.2s}.search-layer.is-open{visibility:visible;pointer-events:auto;transform:none;opacity:1}.search-card{max-width:var(--max);margin:0 auto;background:var(--soft);border:1px solid var(--border);border-radius:0 0 12px 12px;padding:18px;box-shadow:var(--shadow)}.search-head{display:flex;align-items:center;justify-content:space-between;gap:16px}.search-head p{color:var(--muted);margin:2px 0 0}.search-presets{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}.search-presets a{min-height:44px;display:flex;align-items:center;padding:0 16px;background:var(--warm);border:1px solid var(--border);border-radius:9px}.page-mask{position:fixed;inset:0;background:rgba(42,40,36,.46);z-index:140;opacity:0;visibility:hidden;pointer-events:none;transition:.2s}.page-mask.is-open{opacity:1;visibility:visible;pointer-events:auto}.mobile-bottom{display:none}.drawer-open:hover,.app-link:hover,.btn-primary:hover,.btn-secondary:hover,.rock-tabs a:hover,.search-presets a:hover{filter:brightness(.97)}a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid rgba(166,90,58,.45);outline-offset:2px}.tagline{display:inline-block;padding:3px 10px;border-radius:999px;background:var(--moss);color:var(--warm);font-size:12px}.clay-box{background:var(--clay);color:var(--warm);border-radius:10px;padding:18px}.clay-box h2,.clay-box h3{color:var(--warm)}.legal-note{background:var(--warm);border:1px solid var(--accent-border);border-radius:10px;padding:16px}.link-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}.spaced{margin-top:16px}.check-list{padding-left:1.2em}.check-list li{margin-bottom:8px}
@media(max-width:760px){.top-inner,.header-inner{padding:0 16px}.rock-tabs{display:none}.site-main{padding:110px 16px calc(78px + env(safe-area-inset-bottom))}.page-hero,.intro{padding:22px 18px}.two-feature,.split-notes,.reading-points,.methods,.contact-paths,.ju-wall{grid-template-columns:1fr}.shelf-grid{grid-template-columns:repeat(2,1fr)}.observe-item,.memo-row{grid-template-columns:1fr;gap:8px}.footer-grid{grid-template-columns:repeat(2,1fr)}.site-footer{padding-bottom:calc(82px + env(safe-area-inset-bottom))}.mobile-bottom{position:fixed;z-index:130;display:grid;grid-template-columns:repeat(5,1fr);left:0;right:0;bottom:0;min-height:48px;padding-bottom:env(safe-area-inset-bottom);background:var(--warm);border-top:1px solid var(--border)}.mobile-bottom a{height:48px;display:flex;align-items:center;justify-content:center;font-size:12px;color:var(--rockdeep)}.mobile-bottom a.is-active{background:var(--clay);color:var(--warm)}.search-layer{top:0;bottom:0;background:var(--rockdeep);padding:74px 16px 70px;overflow-y:auto}.search-card{background:var(--rockdeep);color:var(--warm);border:0;box-shadow:none;padding:0}.search-head strong,.search-head p{color:var(--warm)}.search-head button{border-color:var(--rocklight)}.search-presets a{background:var(--warm);color:var(--rockdeep)}.timeline{margin-right:-16px;padding-right:16px}.header-actions{gap:6px}.drawer-open,.app-link{padding:0 12px}.brand-fallback{font-size:15px}.rock-header .header-inner{gap:8px}.footer-brand{align-items:flex-start}}
@media(max-width:430px){.stone-line .top-inner>span{max-width:74%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.header-actions .drawer-open,.header-actions .app-link{font-size:13px;padding:0 10px}.brand{min-width:0}.brand-fallback{white-space:nowrap}.shelf-grid{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr 1fr}}