:root{--bg:#E8E4DC;--deep-bg:#D6D0C6;--paper:#F6F3ED;--soft:#EFEBE3;--title:#2C2A26;--text:#3A372F;--muted:#6B675E;--subtle:#8A8478;--rock:#6B675E;--deep:#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);--shell:1080px}
*{box-sizing:border-box}
html{scroll-behavior:smooth;background:var(--bg)}
body{margin:0;background:var(--bg);color:var(--text);font-family:"PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;font-size:15px;line-height:1.7;overflow-x:hidden}
a{color:inherit;text-decoration:none}
button,input{font:inherit}
img{max-width:100%;display:block}
button,a{touch-action:manipulation}
:focus-visible{outline:3px solid rgba(166,90,58,.35);outline-offset:2px}
.shell{width:min(calc(100% - 32px),var(--shell));margin:0 auto}
.no-scroll{overflow:hidden}
.site-header{position:fixed;left:0;right:0;top:0;z-index:60}
.stone-line{height:22px;background:var(--deep);color:var(--warm);font-size:12px;line-height:22px}
.stone-line-inner{display:flex;align-items:center;justify-content:space-between;height:22px}
.plain-button{border:0;background:transparent;color:inherit;padding:0 4px;cursor:pointer;height:22px}
.rock-bar{height:56px;background:var(--deep-bg);border-bottom:1px solid var(--line)}
.rock-bar-inner{display:flex;align-items:center;justify-content:space-between;height:56px;gap:14px}
.brand-link{display:inline-flex;align-items:center;min-height:44px;max-width:46%}
.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-actions{display:flex;align-items:center;gap:8px}
.drawer-trigger,.app-top-link,.drawer-close,.search-topline button{height:44px;min-width:68px;padding:0 14px;border-radius:10px;border:1px solid var(--accent-line);background:var(--warm);color:var(--deep);cursor:pointer;display:inline-flex;align-items:center;justify-content:center;font-size:14px;white-space:nowrap}
.app-top-link{background:linear-gradient(135deg,#8A8478 0%,#6B675E 55%,#3E3B36 100%);color:var(--warm);border-color:transparent}
.rock-tabs{height:38px;background:var(--warm);border-bottom:1px solid var(--line)}
.rock-tabs-inner{height:38px;display:flex;justify-content:center;align-items:center;gap:8px}
.rock-tabs a{font-size:13px;line-height:30px;min-width:68px;text-align:center;border-radius:8px;color:var(--deep)}
.rock-tabs a.is-current{background:var(--deep);color:var(--warm)}
.site-main{padding-top:116px;min-height:70vh}
.page-wrap{padding:34px 0 58px}
.page-kicker{font-size:12px;letter-spacing:.12em;color:var(--clay);font-weight:800;text-transform:uppercase}
h1,h2,h3{color:var(--title);margin:0 0 12px;line-height:1.3}
h1{font-size:24px}h2{font-size:20px}h3{font-size:16px}p{margin:0 0 12px}
.lead{font-size:16px;color:var(--muted);max-width:780px}
.primary-link,.secondary-link{display:inline-flex;align-items:center;justify-content:center;min-height:42px;padding:0 18px;border-radius:10px;font-size:14px;white-space:nowrap;border:1px solid transparent;transition:transform .18s ease,box-shadow .18s ease,background .18s ease}
.primary-link{background:linear-gradient(135deg,#8A8478 0%,#6B675E 55%,#3E3B36 100%);color:var(--warm)}
.secondary-link{background:var(--warm);border-color:var(--accent-line);color:var(--deep)}
.primary-link:hover,.secondary-link:hover,.drawer-trigger:hover,.app-top-link:hover{transform:translateY(-1px);box-shadow:0 8px 16px rgba(44,42,38,.10)}
.media-slot{background:var(--soft);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,48vw)}.media-icon{width:48px;height:48px;border-radius:12px}
.hero-intro{padding:42px 0 30px}
.hero-intro .hero-card{background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:28px;box-shadow:var(--shadow)}
.hero-intro .hero-card p{max-width:760px}.hero-intro .primary-link{margin-top:8px}
.home-pair{display:grid;grid-template-columns:1fr 1fr;gap:18px;padding:8px 0 30px}
.home-pair article{background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:16px}
.home-pair .media-slot{margin-bottom:14px}
.section-block{padding:28px 0;border-top:1px solid var(--line)}
.section-head{display:flex;align-items:end;justify-content:space-between;gap:16px;margin-bottom:18px}
.section-head p{max-width:680px;color:var(--muted);margin:0}
.number-bars{display:grid;gap:10px}
.number-bar{display:grid;grid-template-columns:52px minmax(0,1fr);gap:14px;background:var(--paper);border:1px solid var(--line);border-radius:10px;padding:14px 16px;align-items:start}
.number-bar .mark{width:44px;height:44px;border-radius:10px;background:var(--deep);color:var(--warm);display:flex;align-items:center;justify-content:center;font-weight:800}
.note-cols{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.note-cols article{background:var(--soft);border:1px solid var(--line);border-radius:12px;padding:18px}
.shelf-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.shelf-grid article{background:var(--paper);border:1px solid var(--line);border-top:4px solid var(--moss);border-radius:10px;padding:16px;min-height:140px}
.letter-list{display:grid;grid-template-columns:repeat(5,1fr);gap:10px}
.letter-list article{background:var(--deep);color:var(--warm);border-radius:10px;padding:16px;min-height:150px}.letter-list h3{color:var(--warm)}
.timeline{display:flex;flex-wrap:wrap;gap:12px;padding:6px 2px 12px}
.timeline article{flex:0 0 210px;background:var(--paper);border:1px solid var(--line);border-radius:10px;padding:16px}.status{display:inline-block;font-size:12px;border:1px solid var(--accent-line);color:var(--clay);padding:2px 8px;border-radius:999px;margin-bottom:10px}
.app-stack{display:grid;gap:18px}.app-copy{background:var(--deep);color:var(--warm);border-radius:12px;padding:22px}.app-copy h2{color:var(--warm)}.app-visuals{display:grid;grid-template-columns:1fr 72px;gap:14px;align-items:center;max-width:540px;margin:0 auto}.app-visuals .media-icon{justify-self:center}
.reading-points{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.reading-points article{background:var(--paper);border:1px solid var(--line);border-radius:10px;padding:16px}
.faq-mini{display:grid;grid-template-columns:1fr 1fr;gap:12px}.faq-mini details{background:var(--soft);border:1px solid var(--line);border-radius:10px;padding:14px 16px}.faq-mini summary{cursor:pointer;font-weight:800;color:var(--deep)}
.brand-story{background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:22px}
.page-hero{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(260px,.8fr);gap:20px;align-items:center;padding:34px 0}.page-hero.no-media{grid-template-columns:1fr}.page-hero .media-slot{width:100%}
.observe-index{display:grid;grid-template-columns:220px 1fr;gap:20px}.observe-nav{background:var(--deep);color:var(--warm);border-radius:12px;padding:16px;position:sticky;top:132px;height:max-content}.observe-nav a{display:block;padding:9px 10px;border-bottom:1px solid rgba(247,243,235,.16)}.observe-body section{background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:18px;margin-bottom:14px}
.card-wall{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.card-wall article{background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:18px;min-height:230px}.card-wall article:nth-child(2n){background:var(--soft)}
.memo-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.memo-grid section{background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:18px}.memo-grid section:nth-child(3n){grid-column:1/-1;background:var(--soft)}
.horizontal-steps{display:flex;flex-wrap:wrap;gap:12px;padding:4px 2px 14px}.horizontal-steps section{flex:0 0 250px;background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:18px;position:relative}.horizontal-steps section:after{content:"";position:absolute;right:-13px;top:32px;width:14px;height:1px;background:var(--clay)}.horizontal-steps section:last-child:after{display:none}
.checklist{display:grid;gap:12px}.checklist section{background:var(--paper);border-left:5px solid var(--moss);border-radius:10px;padding:16px 18px}.checklist ul{margin:10px 0 0;padding-left:20px}
.method-flow{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.method-flow section{background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:18px}.method-flow section:nth-child(3){background:var(--deep);color:var(--warm)}.method-flow section:nth-child(3) h2{color:var(--warm)}
.theme-list{display:grid;gap:12px}.theme-row{display:grid;grid-template-columns:150px 1fr;gap:16px;background:var(--paper);border:1px solid var(--line);border-radius:10px;padding:16px}.theme-row strong{color:var(--clay)}
.rack-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.rack{background:var(--deep-bg);border:1px solid var(--line);border-radius:10px;padding:12px}.rack h2{font-size:16px;padding:8px 6px}.rack article{background:var(--paper);border:1px solid var(--line);border-radius:8px;padding:14px;margin-top:8px;min-height:150px}
.product-layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:22px;align-items:start}.product-copy{display:grid;gap:12px}.product-copy section{background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:18px}.product-side{position:sticky;top:132px}.icon-row{display:flex;gap:12px;align-items:center;margin-bottom:12px}
.clause-stack{display:grid;gap:12px}.clause-stack section{background:var(--paper);border:1px solid var(--line);border-radius:10px;padding:18px}.clause-stack section h2{padding-bottom:10px;border-bottom:1px solid var(--line)}
.help-layout{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.help-layout article{background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:18px;min-height:220px}
.faq-list{display:grid;gap:12px}.faq-item{background:var(--paper);border:1px solid var(--line);border-radius:10px;padding:18px}.faq-item h2{font-size:16px;margin-bottom:8px}.faq-item p{margin:0;color:var(--text)}
.contact-areas{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.contact-areas section{background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:18px}.contact-guide{margin-top:16px;background:var(--deep);color:var(--warm);border-radius:12px;padding:20px}.contact-guide h2{color:var(--warm)}
.about-steps{display:grid;gap:0}.about-step{display:grid;grid-template-columns:120px 1fr;gap:18px;padding:20px 0;border-bottom:1px solid var(--line)}.about-step .label{font-weight:800;color:var(--clay)}
.site-footer{background:#2A2824;color:#E8E4DC;border-top:1px solid rgba(200,194,182,.35);padding:30px 0 78px;font-size:13px}.footer-grid{display:grid;grid-template-columns:1.4fr repeat(4,1fr);gap:20px}.footer-brand{display:flex;flex-direction:column;gap:7px}.footer-grid h2{font-size:13px;color:#F7F3EB;margin-bottom:8px}.footer-grid a{display:block;padding:3px 0;color:#E8E4DC}.footer-note{border-top:1px solid rgba(200,194,182,.22);margin-top:22px;padding-top:18px;color:#C8C2B6}.footer-note p:last-child{margin-bottom:0}
.site-overlay{position:fixed;inset:0;background:rgba(42,40,36,.48);z-index:70;opacity:0;visibility:hidden;pointer-events:none;transition:.2s}.site-overlay.is-open{opacity:1;visibility:visible;pointer-events:auto}
.rock-drawer{position:fixed;left:0;top:0;bottom:0;width:380px;max-width:88vw;background:var(--paper);z-index:80;transform:translateX(-102%);visibility:hidden;pointer-events:none;transition:transform .24s ease,visibility .24s;overflow:auto;box-shadow:var(--shadow)}.rock-drawer.is-open{transform:translateX(0);visibility:visible;pointer-events:auto}.drawer-head{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:14px 16px;border-bottom:1px solid var(--line);position:sticky;top:0;background:var(--paper);z-index:2}.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)}.drawer-close{min-width:64px}.drawer-sections{padding:10px 16px 24px}.drawer-sections section{padding:10px 0;border-bottom:1px solid var(--line)}.drawer-sections section:last-child{border-bottom:0}.drawer-sections h2{font-size:13px;color:var(--clay);margin:0 0 6px}.drawer-sections a{display:block;padding:9px 0}.drawer-sections b{display:block;font-size:14px;color:var(--deep)}.drawer-sections span{display:block;font-size:12px;color:var(--muted)}
.search-panel{position:fixed;left:0;right:0;top:78px;z-index:85;visibility:hidden;pointer-events:none;opacity:0;transform:translateY(-10px);transition:.2s}.search-panel.is-open{visibility:visible;pointer-events:auto;opacity:1;transform:none}.search-card{width:min(calc(100% - 32px),780px);margin:0 auto;background:var(--deep-bg);border:1px solid var(--line);border-radius:0 0 12px 12px;padding:18px;box-shadow:var(--shadow)}.search-topline{display:flex;align-items:flex-start;justify-content:space-between;gap:16px}.search-topline p{font-size:13px;color:var(--muted);margin:2px 0 0}.preset-links{display:grid;grid-template-columns:repeat(6,1fr);gap:8px;margin-top:16px}.preset-links a{min-height:44px;border:1px solid var(--accent-line);background:var(--warm);border-radius:9px;display:flex;align-items:center;justify-content:center;color:var(--deep)}
.mobile-bottom{display:none}
@media (max-width:860px){
  .footer-grid{grid-template-columns:repeat(2,1fr)}.footer-brand{grid-column:1/-1}
  .shelf-grid{grid-template-columns:repeat(2,1fr)}.letter-list{grid-template-columns:repeat(2,1fr)}.letter-list article:last-child{grid-column:1/-1}
  .reading-points{grid-template-columns:1fr}.card-wall{grid-template-columns:repeat(2,1fr)}.rack-grid{grid-template-columns:1fr 1fr}.product-layout{grid-template-columns:1fr}.product-side{position:static}.observe-index{grid-template-columns:1fr}.observe-nav{position:static}.observe-nav a{display:inline-block;border-bottom:0;border-right:1px solid rgba(247,243,235,.16)}
}
@media (max-width:640px){
  body{font-size:15px;padding-bottom:calc(58px + env(safe-area-inset-bottom))}.shell{width:calc(100% - 32px)}
  .rock-tabs{display:none}.site-main{padding-top:78px}.site-footer{padding-bottom:90px}
  .brand-link{max-width:42%}.brand-logo{max-width:100%;height:26px}.rock-actions{gap:6px}.drawer-trigger,.app-top-link{min-width:60px;padding:0 10px}
  .hero-intro{padding:26px 0 20px}.hero-intro .hero-card{padding:20px}.home-pair,.note-cols,.memo-grid,.method-flow,.help-layout,.contact-areas{grid-template-columns:1fr}.home-pair{gap:12px}.memo-grid section:nth-child(3n){grid-column:auto}.shelf-grid,.letter-list,.faq-mini,.rack-grid,.card-wall{grid-template-columns:1fr}.letter-list article:last-child{grid-column:auto}.reading-points{grid-template-columns:1fr}.page-hero{grid-template-columns:1fr;padding:24px 0}.theme-row{grid-template-columns:1fr}.about-step{grid-template-columns:1fr;gap:6px}.app-visuals{grid-template-columns:1fr 64px}.media-app{height:320px}.section-head{align-items:flex-start;flex-direction:column}.number-bar{grid-template-columns:46px 1fr}.number-bar .mark{width:40px;height:40px}.footer-grid{grid-template-columns:1fr 1fr}
  .search-panel{top:0;bottom:0;background:var(--deep)}.search-card{width:100%;height:100%;border:0;border-radius:0;background:var(--deep);color:var(--warm);padding:22px 16px;overflow:auto}.search-topline strong{color:var(--warm)}.search-topline p{color:var(--light)}.search-topline button{background:var(--warm)}.preset-links{grid-template-columns:1fr 1fr}.preset-links a{background:var(--warm);color:var(--deep)}
  .mobile-bottom{display:grid;grid-template-columns:repeat(5,1fr);position:fixed;left:0;right:0;bottom:0;z-index:65;height:calc(48px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);background:var(--warm);border-top:1px solid var(--line)}.mobile-bottom a{min-height:48px;display:flex;align-items:center;justify-content:center;font-size:12px;color:var(--deep)}.mobile-bottom a.is-current{background:var(--clay);color:var(--warm)}
  .site-overlay{z-index:90}.rock-drawer{z-index:100}.search-panel{z-index:105}
}

.mt-14{margin-top:14px}.app-kicker{color:#E8E4DC}

@media (max-width:640px){.timeline article,.horizontal-steps section{flex-basis:100%}.horizontal-steps section:after{display:none}}