:root{
  --bg:#E8E4DC;--deep-bg:#D6D0C6;--paper:#F6F3ED;--soft:#EFEBE3;--ink:#2C2A26;--text:#3A372F;--muted:#6B675E;--assist:#8A8478;--rock:#6B675E;--dark:#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;--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.is-locked{overflow:hidden}a{color:inherit;text-decoration:none}button,input{font:inherit}button{color:inherit}img{max-width:100%;display:block}.skip-link{position:fixed;left:16px;top:-60px;z-index:100;background:var(--dark);color:var(--warm);padding:8px 14px;border-radius:8px}.skip-link:focus{top:8px}.content-wrap,.shell-inner{width:min(var(--max),calc(100% - 32px));margin:0 auto}.top-shell{position:fixed;inset:0 0 auto;z-index:50}.stone-line{height:22px;background:var(--dark);color:var(--warm);font-size:12px}.stone-line-inner{height:22px;display:flex;align-items:center;justify-content:space-between;gap:12px}.text-button{border:0;background:transparent;color:var(--warm);padding:0 6px;min-height:22px;cursor:pointer}.rock-bar{height:56px;background:var(--deep-bg);border-bottom:1px solid var(--line)}.rock-bar-inner{height:56px;display:flex;align-items:center;justify-content:space-between;gap:16px}.brand-link{display:flex;align-items:center;min-width:0;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:700;color:var(--ink)}.rock-actions{display:flex;align-items:center;gap:8px}.action-button{height:42px;display:inline-flex;align-items:center;justify-content:center;padding:0 16px;border-radius:9px;font-size:14px;white-space:nowrap}.primary-action,.btn-primary{background:linear-gradient(135deg,#8A8478 0%,#6B675E 55%,#3E3B36 100%);color:var(--warm);border:1px solid transparent}.secondary-action,.btn-secondary{background:var(--warm);color:var(--dark);border:1px solid var(--clay)}button.action-button{cursor:pointer}.rock-tabs{height:38px;background:var(--warm);border-bottom:1px solid var(--line)}.rock-tabs-inner{height:38px;display:flex;align-items:center;justify-content:center;gap:6px}.rock-tabs a{height:30px;min-width:78px;display:flex;align-items:center;justify-content:center;padding:0 14px;border-radius:8px;font-size:13px;color:var(--dark)}.rock-tabs a.is-current{background:var(--dark);color:var(--warm)}.site-main{padding-top:116px;min-height:60vh}.page-hero{padding:46px 0 28px}.page-hero.compact{padding-bottom:18px}.eyebrow{font-size:12px;letter-spacing:.12em;color:var(--clay);font-weight:700}.page-hero h1,.intro-stone h1{font-size:24px;line-height:1.3;color:var(--ink);margin:8px 0 12px}.page-hero p,.intro-stone p{max-width:760px;margin:0;color:var(--text)}h2{font-size:20px;line-height:1.35;color:var(--ink);margin:0 0 12px}h3{font-size:16px;line-height:1.4;color:var(--ink);margin:0 0 8px}p{margin:0 0 12px}.section{padding:28px 0}.section.alt{background:var(--soft);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:18px}.section-head p{max-width:620px;color:var(--muted);margin:0}.intro-stone{padding:54px 0 42px}.intro-panel{max-width:820px;padding:30px;border-left:4px solid var(--clay);background:var(--paper);box-shadow:var(--shadow);border-radius:0 10px 10px 0}.intro-panel .lead{font-size:18px;color:var(--dark);font-weight:700;margin-bottom:12px}.button-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:20px}.btn{height:42px;display:inline-flex;align-items:center;justify-content:center;padding:0 18px;border-radius:9px;font-size:14px;white-space:nowrap}.split-observe{display:grid;grid-template-columns:1fr 1fr;gap:18px}.feature-panel{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}.feature-panel .body{padding:20px}.media-slot{min-height:120px;background:var(--deep-bg);display:flex;align-items:center;justify-content:center;overflow:hidden;border:1px solid var(--line);border-radius:var(--radius)}.media-slot img{width:100%;height:100%;object-fit:contain;object-position:center}.media-slot.h168{height:168px;border-radius:0;border-width:0 0 1px}.media-slot.h190{height:190px}.media-slot.banner{height:220px}.media-slot.app-vertical{height:320px;background:var(--warm)}.media-slot.inline-media{height:210px}.number-strips{display:grid;gap:10px}.number-strip{display:grid;grid-template-columns:54px minmax(0,1fr);gap:14px;align-items:start;padding:16px 18px;background:var(--paper);border:1px solid var(--line);border-radius:10px}.number-strip .mark{width:42px;height:42px;border-radius:8px;background:var(--dark);color:var(--warm);display:flex;align-items:center;justify-content:center;font-weight:700}.number-strip p{margin:0;color:var(--muted)}.note-columns{display:grid;grid-template-columns:1fr 1fr;gap:18px}.note-sheet{padding:22px;background:var(--warm);border:1px solid var(--line);border-radius:10px;box-shadow:var(--shadow)}.note-sheet ul,.plain-list{margin:10px 0 0;padding-left:20px}.note-sheet li,.plain-list li{margin:6px 0}.shelf-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.shelf-cell{padding:18px;min-height:150px;background:var(--paper);border:1px solid var(--line);border-top:4px solid var(--moss);border-radius:8px}.shelf-cell p{color:var(--muted);margin:0}.letter-list{display:grid;gap:10px}.letter-row{display:grid;grid-template-columns:58px minmax(0,1fr);gap:16px;padding:18px;background:var(--paper);border:1px solid var(--line);border-radius:10px}.letter-row b{display:flex;align-items:center;justify-content:center;width:44px;height:44px;background:var(--clay);color:var(--warm);border-radius:50%}.letter-row p{margin:0}.status-track{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;position:relative}.status-node{position:relative;padding:22px;background:var(--paper);border:1px solid var(--line);border-radius:10px}.status-node::before{content:"";position:absolute;left:22px;top:-8px;width:14px;height:14px;border-radius:50%;background:var(--moss);border:3px solid var(--bg)}.status-tag{display:inline-flex;padding:3px 9px;border-radius:999px;background:var(--deep-bg);color:var(--dark);font-size:12px;margin-bottom:8px}.app-stack{display:grid;grid-template-columns:1.1fr .9fr;gap:24px;align-items:start}.app-copy{padding:24px;background:var(--dark);color:var(--warm);border-radius:10px}.app-copy h2,.app-copy h3{color:var(--warm)}.app-copy p{color:#F3EFE8}.app-icon-line{display:flex;align-items:center;gap:12px;margin-bottom:16px}.icon-slot{width:48px;height:48px;border-radius:10px;background:var(--warm);display:flex;align-items:center;justify-content:center;overflow:hidden}.icon-slot img{width:48px;height:48px;object-fit:contain}.reading-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.reading-card{padding:20px;background:var(--paper);border:1px solid var(--line);border-radius:10px}.faq-mini{display:grid;grid-template-columns:1fr 1fr;gap:14px}.faq-mini article{padding:18px;background:var(--warm);border:1px solid var(--line);border-radius:10px}.brand-story{padding:24px;background:var(--deep-bg);border-radius:10px;border:1px solid var(--line)}.article-body{padding-bottom:48px}.prose-section{padding:22px 0;border-top:1px solid var(--line)}.prose-section:first-child{border-top:0}.prose-section p{max-width:880px}.directory-list{display:grid;gap:12px}.directory-item{display:grid;grid-template-columns:140px minmax(0,1fr);gap:20px;padding:20px 0;border-top:1px solid var(--line)}.directory-item:first-child{border-top:0}.directory-key{font-weight:700;color:var(--clay)}.card-wall{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.wall-card{padding:20px;background:var(--paper);border:1px solid var(--line);border-radius:10px;min-height:180px}.memo-checks{display:grid;gap:12px}.memo-item{display:grid;grid-template-columns:28px minmax(0,1fr);gap:12px;padding:16px;background:var(--paper);border:1px solid var(--line);border-radius:10px}.memo-dot{width:18px;height:18px;border:2px solid var(--moss);border-radius:4px;margin-top:4px}.method-steps{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.method-step{padding:22px;background:var(--warm);border-left:4px solid var(--moss);border-radius:8px}.theme-list{display:grid;gap:10px}.theme-row{padding:18px 20px;background:var(--paper);border:1px solid var(--line);border-radius:10px}.theme-row strong{display:block;color:var(--ink);margin-bottom:5px}.theme-row p{margin:0;color:var(--muted)}.clause-list{counter-reset:clause;display:grid;gap:12px}.clause{padding:20px;background:var(--paper);border:1px solid var(--line);border-radius:10px}.clause h2{font-size:18px}.help-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.help-box{padding:20px;background:var(--paper);border:1px solid var(--line);border-radius:10px}.faq-list{display:grid;gap:12px}.faq-item{padding:20px;background:var(--paper);border:1px solid var(--line);border-radius:10px}.faq-item h2{font-size:17px}.contact-lanes{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.contact-lane{padding:22px;background:var(--paper);border-top:4px solid var(--clay);border-radius:8px}.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.about-panel{padding:22px;background:var(--paper);border:1px solid var(--line);border-radius:10px}.site-footer{background:#2A2824;color:#E8E4DC;border-top:1px solid rgba(200,194,182,.25);font-size:13px;padding:36px 0 22px}.footer-grid{display:grid;grid-template-columns:1.7fr repeat(4,1fr);gap:22px}.footer-brand p{color:#E8E4DC;max-width:360px}.footer-en{letter-spacing:.08em;font-size:12px}.footer-col h2{font-size:14px;color:#F7F3EB;margin-bottom:10px}.footer-col a{display:block;color:#E8E4DC;padding:4px 0}.footer-bottom{margin-top:24px;padding-top:18px;border-top:1px solid rgba(200,194,182,.2);color:#C8C2B6}.page-overlay{position:fixed;inset:0;background:rgba(42,40,36,.46);z-index:70;opacity:0;visibility:hidden;pointer-events:none;transition:.2s ease}.page-overlay.is-visible{opacity:1;visibility:visible;pointer-events:auto}.rock-drawer{position:fixed;inset:0 auto 0 0;width:380px;max-width:88vw;background:var(--warm);z-index:80;transform:translateX(-105%);visibility:hidden;pointer-events:none;transition:transform .24s ease,visibility .24s}.rock-drawer.is-open{transform:translateX(0);visibility:visible;pointer-events:auto}.drawer-head{height:74px;display:flex;align-items:center;justify-content:space-between;padding:0 16px;border-bottom:1px solid var(--line);background:var(--deep-bg)}.drawer-brand{display:flex;align-items:center;gap:10px}.drawer-brand div{display:flex;flex-direction:column}.drawer-brand span{font-size:11px;color:var(--muted)}.icon-close{width:44px;height:44px;border:1px solid var(--line);background:var(--warm);border-radius:9px;font-size:24px;cursor:pointer}.drawer-scroll{height:calc(100vh - 74px);overflow-y:auto;padding:12px 16px 28px}.drawer-group{padding:10px 0;border-bottom:1px solid var(--line)}.drawer-group h2{font-size:13px;color:var(--clay);margin:0 0 6px}.drawer-group a{display:block;padding:10px;border-radius:8px}.drawer-group a:hover{background:var(--soft)}.drawer-group b{display:block;font-size:14px;color:var(--ink)}.drawer-group span{display:block;font-size:12px;color:var(--muted)}.search-layer{position:fixed;left:0;right:0;top:78px;z-index:75;visibility:hidden;opacity:0;pointer-events:none;transition:.2s ease}.search-layer.is-open{visibility:visible;opacity:1;pointer-events:auto}.search-card{width:min(760px,calc(100% - 32px));margin:16px auto;background:var(--deep-bg);border:1px solid var(--line);border-radius:10px;box-shadow:var(--shadow);padding:18px}.search-head{display:flex;justify-content:space-between;gap:16px}.search-head strong{font-size:18px;color:var(--ink)}.search-head p{font-size:13px;color:var(--muted)}.search-input-wrap{display:block;margin:14px 0}.search-input-wrap span{display:block;font-size:12px;color:var(--muted);margin-bottom:5px}.search-input-wrap input{width:100%;height:44px;border:1px solid var(--line);border-radius:8px;background:var(--paper);padding:0 12px;color:var(--text);outline:none}.search-input-wrap input:focus{border-color:var(--clay);box-shadow:0 0 0 3px rgba(166,90,58,.12)}.preset-links{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.preset-links a{padding:12px;background:var(--paper);border:1px solid var(--line);border-radius:8px;color:var(--dark)}.preset-links a span{display:block;font-size:12px;color:var(--muted)}.mobile-bottom{display:none}.btn:hover,.action-button:hover,.rock-tabs a:hover,.preset-links a:hover{filter:brightness(.98);transform:translateY(-1px)}a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid rgba(166,90,58,.45);outline-offset:2px}.muted{color:var(--muted)}.callout{padding:18px 20px;background:var(--deep-bg);border-left:4px solid var(--clay);border-radius:8px}.legal-note{padding:18px;background:var(--warm);border:1px solid var(--accent-line);border-radius:10px}.two-up{display:grid;grid-template-columns:1fr 1fr;gap:16px}.tag{display:inline-flex;padding:3px 9px;border-radius:999px;background:var(--deep-bg);font-size:12px;color:var(--dark);margin-right:6px}.small{font-size:13px;color:var(--muted)}
@media (max-width:860px){.footer-grid{grid-template-columns:1.5fr repeat(2,1fr)}.footer-brand{grid-row:span 2}.shelf-grid{grid-template-columns:repeat(2,1fr)}.reading-grid{grid-template-columns:1fr}.app-stack{grid-template-columns:1fr}.status-track{grid-template-columns:1fr}.preset-links{grid-template-columns:repeat(2,1fr)}}
@media (max-width:680px){body{padding-bottom:calc(48px + env(safe-area-inset-bottom))}.content-wrap,.shell-inner{width:calc(100% - 32px)}.rock-tabs{display:none}.site-main{padding-top:78px}.stone-line-inner{font-size:11px}.rock-bar-inner{gap:8px}.brand-logo{max-width:132px}.rock-actions{gap:6px}.action-button{height:44px;padding:0 12px}.intro-stone{padding:34px 0 28px}.intro-panel{padding:22px}.page-hero{padding:34px 0 20px}.split-observe,.note-columns,.faq-mini,.card-wall,.method-steps,.help-grid,.contact-lanes,.about-grid,.two-up{grid-template-columns:1fr}.media-slot.h168{height:168px}.shelf-grid{grid-template-columns:1fr 1fr}.directory-item{grid-template-columns:1fr;gap:6px}.footer-grid{grid-template-columns:1fr 1fr}.footer-brand{grid-column:1/-1;grid-row:auto}.search-layer{inset:0;top:0;background:var(--dark);display:flex;align-items:flex-start}.search-layer .search-card{width:100%;min-height:100vh;margin:0;border:0;border-radius:0;background:var(--dark);color:var(--warm);padding:24px 16px}.search-layer .search-head strong,.search-layer .search-head p,.search-layer .search-input-wrap span{color:var(--warm)}.search-layer .preset-links a{background:#4B4740;color:var(--warm);border-color:rgba(247,243,235,.18)}.search-layer .preset-links a span{color:#E8E4DC}.search-layer .icon-close{background:var(--warm);color:var(--dark)}.preset-links{grid-template-columns:1fr}.mobile-bottom{position:fixed;left:0;right:0;bottom:0;height:calc(48px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);z-index:60;display:grid;grid-template-columns:repeat(5,1fr);background:var(--warm);border-top:1px solid var(--line)}.mobile-bottom a{height:48px;display:flex;align-items:center;justify-content:center;font-size:12px;color:var(--dark)}.mobile-bottom a.is-current{background:var(--clay);color:var(--warm)}.site-footer{padding-bottom:72px}.section{padding:24px 0}.section-head{align-items:flex-start;flex-direction:column;gap:4px}.number-strip{grid-template-columns:48px 1fr;padding:14px}.letter-row{grid-template-columns:48px 1fr}.app-copy{padding:20px}.media-slot.app-vertical{height:300px}}
@media (max-width:430px){.stone-line-inner span{max-width:75%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.brand-logo{max-width:112px}.action-button{padding:0 10px;font-size:13px}.shelf-grid{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr}.footer-brand{grid-column:auto}.intro-panel{padding:18px}.number-strip{grid-template-columns:42px 1fr}.number-strip .mark{width:36px;height:36px}.letter-row{grid-template-columns:40px 1fr;padding:14px}.letter-row b{width:36px;height:36px}}

.mt14{margin-top:14px}.mt16{margin-top:16px}.mt18{margin-top:18px}.mt20{margin-top:20px}.on-dark{color:#F7F3EB}.on-dark-muted{color:#E8E4DC}