*{box-sizing:border-box}
:root{
  --bg:#E8E4DC;--deep-bg:#D6D0C6;--panel:#F6F3ED;--panel-2:#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;
}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:"Microsoft YaHei","PingFang SC","Noto Sans SC",Arial,sans-serif;font-size:15px;line-height:1.7;overflow-x:hidden}
a{color:inherit;text-decoration:none}
button,input{font:inherit}
button{cursor:pointer}
img{display:block;max-width:100%;height:auto}
.stone-line{position:fixed;top:0;left:0;right:0;height:22px;background:var(--deep-rock);color:var(--warm);z-index:60;font-size:12px}
.top-inner,.header-inner,.tabs-inner,.footer-inner{width:min(var(--max),calc(100% - 32px));margin:0 auto}
.top-inner{height:22px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.text-button{border:0;background:transparent;color:var(--warm);padding:0 4px;min-height:22px}
.rock-header{position:fixed;top:22px;left:0;right:0;height:56px;background:var(--bg);border-bottom:1px solid var(--border);z-index:59}
.header-inner{height:56px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.brand-link{display:inline-flex;min-height:44px;align-items:center}
.brand-logo,.footer-logo,.drawer-brand img{height:26px;width:auto;object-fit:contain;object-position:center}
.brand-text{font-size:16px;font-weight:800;color:var(--title)}
.header-actions{display:flex;align-items:center;gap:8px}
.rock-drawer-button,.app-link-button,.drawer-close,.search-head button{
  min-height:44px;border-radius:9px;padding:0 16px;font-size:14px;display:inline-flex;align-items:center;justify-content:center
}
.rock-drawer-button,.drawer-close,.search-head button{border:1px solid var(--accent-border);background:var(--warm);color:var(--deep-rock)}
.app-link-button{background:linear-gradient(135deg,#8A8478 0%,#6B675E 55%,#3E3B36 100%);color:var(--warm);border:1px solid transparent}
.rock-tabs{position:fixed;top:78px;left:0;right:0;height:38px;background:var(--warm);border-bottom:1px solid var(--border);z-index:58}
.tabs-inner{height:38px;display:flex;align-items:center;justify-content:center;gap:4px}
.tabs-inner a{font-size:13px;min-height:32px;padding:5px 18px;border-radius:7px;display:flex;align-items:center}
.tabs-inner a.is-active{background:var(--deep-rock);color:var(--warm)}
.site-main{padding-top:136px;min-height:70vh}
.page-shell{width:min(var(--max),calc(100% - 32px));margin:0 auto;padding:28px 0 68px}
.hero-intro{padding:34px 0 30px;border-bottom:1px solid var(--border)}
.eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--clay);font-weight:700;font-size:13px;letter-spacing:.08em}
h1,h2,h3{color:var(--title);margin:0 0 14px;line-height:1.3}
h1{font-size:24px}
h2{font-size:20px}
h3{font-size:16px}
p{margin:0 0 14px}
.lead{font-size:16px;max-width:760px;color:var(--text)}
.muted{color:var(--muted)}
.primary-button,.secondary-button,.inline-link{
  min-height:42px;padding:9px 16px;border-radius:9px;font-size:14px;display:inline-flex;align-items:center;justify-content:center;white-space:nowrap
}
.primary-button{background:linear-gradient(135deg,#8A8478 0%,#6B675E 55%,#3E3B36 100%);color:var(--warm);border:1px solid transparent}
.secondary-button{background:var(--warm);color:var(--deep-rock);border:1px solid var(--clay)}
.inline-link{background:transparent;color:var(--clay);border:1px solid var(--accent-border)}
.button-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
.section{padding:34px 0;border-bottom:1px solid var(--border)}
.section:last-child{border-bottom:0}
.section-head{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:18px}
.section-head p{max-width:640px;margin:0;color:var(--muted)}
.two-up{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.feature-panel,.note-card,.wall-card,.method-block,.article-panel,.timeline-node,.shelf-cell,.faq-item{
  background:var(--panel);border:1px solid var(--border);border-radius:10px;box-shadow:var(--shadow)
}
.feature-panel,.note-card,.wall-card,.method-block,.article-panel,.faq-item{padding:20px}
.media-slot,.media-wide,.media-banner,.media-app,.media-small{
  background:var(--panel-2);border:1px solid var(--border);border-radius:10px;display:flex;align-items:center;justify-content:center;overflow:hidden
}
.media-slot img,.media-wide img,.media-banner img,.media-app img,.media-small img{width:100%;height:100%;object-fit:contain;object-position:center}
.media-slot{height:168px;margin-bottom:16px}
.media-wide{height:190px;margin:16px 0}
.media-banner{height:220px;margin:18px 0 24px}
.media-app{height:340px;margin:18px auto 0;max-width:760px}
.media-small{height:110px}
.number-strips{display:grid;gap:12px}
.number-strip{display:grid;grid-template-columns:64px 1fr;gap:16px;align-items:start;background:var(--panel);border:1px solid var(--border);border-radius:10px;padding:18px}
.number-strip .mark{font-size:20px;font-weight:800;color:var(--clay);background:var(--warm);border:1px solid var(--accent-border);border-radius:8px;min-height:44px;display:flex;align-items:center;justify-content:center}
.note-columns{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.note-list{margin:0;padding-left:1.2em}
.note-list li+li{margin-top:8px}
.shelf-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.shelf-cell{padding:18px;min-height:156px;position:relative}
.shelf-cell:before{content:"";position:absolute;left:14px;right:14px;bottom:14px;border-bottom:2px solid var(--light-rock)}
.letter-list{display:grid;gap:10px}
.letter-row{display:grid;grid-template-columns:52px 1fr;gap:16px;border-bottom:1px solid var(--border);padding:16px 0}
.letter-row strong{width:42px;height:42px;border-radius:50%;background:var(--deep-rock);color:var(--warm);display:flex;align-items:center;justify-content:center}
.timeline{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;padding:8px 2px 16px}
.timeline-node{min-width:0;padding:18px}
.status{display:inline-block;font-size:12px;padding:3px 9px;border-radius:999px;background:var(--deep-rock);color:var(--warm);margin-bottom:10px}
.status.moss{background:var(--moss)}
.status.clay{background:var(--clay)}
.read-points,.topic-list,.memo-list{display:grid;gap:12px}
.read-point,.topic-item,.memo-item{padding:18px;border-left:4px solid var(--moss);background:var(--panel);border-radius:0 10px 10px 0}
.topic-item:nth-child(even),.memo-item:nth-child(even){border-left-color:var(--clay)}
.faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.faq-item h3{margin-bottom:8px}
.brand-block{display:grid;grid-template-columns:1.3fr .7fr;gap:20px;align-items:start}
.kicker-box{background:var(--deep-rock);color:var(--warm);padding:22px;border-radius:10px}
.kicker-box h2,.kicker-box h3{color:var(--warm)}
.kicker-box p:last-child{margin-bottom:0}
.category-directory{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.directory-row{display:grid;grid-template-columns:120px 1fr;gap:18px;padding:18px 0;border-bottom:1px solid var(--border)}
.card-wall{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.wall-card{min-height:220px}
.wall-card small{color:var(--clay);font-weight:700}
.memo-board{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.memo-column{background:var(--panel);border:1px solid var(--border);border-radius:10px;padding:20px}
.method-stack{display:grid;gap:16px}
.theme-list{display:grid;gap:14px}
.theme-row{display:grid;grid-template-columns:180px 1fr;gap:18px;background:var(--panel);border:1px solid var(--border);border-radius:10px;padding:18px}
.shelf-page{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.shelf-page .shelf-cell{min-height:210px}
.product-hero{display:grid;grid-template-columns:1fr .9fr;gap:24px;align-items:start}
.product-copy{background:var(--panel);border:1px solid var(--border);border-radius:10px;padding:24px}
.policy-sections{display:grid;gap:18px}
.policy-section{background:var(--panel);border:1px solid var(--border);border-radius:10px;padding:22px}
.help-index{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.contact-box{background:var(--warm);border:1px solid var(--accent-border);border-radius:10px;padding:22px}
.site-footer{background:#2A2824;color:#E8E4DC;border-top:1px solid var(--light-rock);font-size:13px}
.footer-inner{padding:34px 0 84px}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:26px}
.footer-brand strong{display:block;font-size:16px;color:var(--warm)}
.footer-brand span{display:block;color:#D6D0C6;margin-top:2px}
.footer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.footer-grid h2{font-size:14px;color:var(--warm);margin-bottom:10px}
.footer-grid a{display:block;color:#E8E4DC;padding:4px 0}
.footer-note{margin-top:26px;padding-top:18px;border-top:1px solid rgba(232,228,220,.16);color:#D6D0C6}
.copyright{color:#C8C2B6;margin-bottom:0}
.rock-drawer{position:fixed;top:0;left:0;bottom:0;width:380px;max-width:88vw;background:var(--warm);z-index:90;transform:translateX(-104%);visibility:hidden;pointer-events:none;transition:transform .25s ease,visibility .25s ease;box-shadow:18px 0 36px rgba(44,42,38,.18)}
.drawer-open .rock-drawer{transform:translateX(0);visibility:visible;pointer-events:auto}
.drawer-head{height:70px;display:flex;align-items:center;justify-content:space-between;padding:12px 16px;border-bottom:1px solid var(--border)}
.drawer-brand{display:flex;align-items:center;gap:10px}
.drawer-scroll{height:calc(100% - 70px);overflow-y:auto;padding:16px}
.drawer-scroll section+section{margin-top:18px}
.drawer-scroll h2{font-size:14px;color:var(--clay);margin-bottom:8px}
.drawer-scroll a{display:grid;grid-template-columns:100px 1fr;gap:12px;padding:10px 0;border-bottom:1px solid var(--border)}
.drawer-scroll a strong{color:var(--title)}
.drawer-scroll a span{color:var(--muted);font-size:13px}
.site-mask{position:fixed;inset:0;background:rgba(42,40,36,.46);z-index:80;opacity:0;visibility:hidden;pointer-events:none;transition:.2s}
.site-mask.is-visible{opacity:1;visibility:visible;pointer-events:auto}
.search-layer{position:fixed;top:78px;left:0;right:0;z-index:85;visibility:hidden;pointer-events:none}
.search-open .search-layer{visibility:visible;pointer-events:auto}
.search-card{width:min(760px,calc(100% - 32px));margin:12px auto;background:var(--bg);border:1px solid var(--border);box-shadow:var(--shadow);border-radius:12px;padding:18px}
.search-head{display:flex;justify-content:space-between;gap:20px;align-items:center}
.search-head p{margin:2px 0 0;color:var(--muted)}
.search-presets{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}
.search-presets a{min-height:40px;padding:8px 14px;display:flex;align-items:center;background:var(--warm);border:1px solid var(--accent-border);border-radius:8px}
.overlay-lock{overflow:hidden}
.mobile-bottom{display:none}
a:hover,.text-button:hover{opacity:.82}
a:focus-visible,button:focus-visible{outline:3px solid rgba(166,90,58,.35);outline-offset:2px}
.quote-line{padding:18px 20px;border-left:4px solid var(--clay);background:var(--warm);border-radius:0 10px 10px 0}
.compact-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.meta-note{font-size:13px;color:var(--muted)}
@media (max-width:820px){
  .rock-tabs{display:none}
  .site-main{padding-top:98px;padding-bottom:56px}
  .two-up,.note-columns,.brand-block,.product-hero,.memo-board,.category-directory,.help-index,.compact-grid,.timeline{grid-template-columns:1fr}
  .shelf-grid{grid-template-columns:repeat(2,1fr)}
  .card-wall{grid-template-columns:1fr 1fr}
  .shelf-page{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:repeat(2,1fr)}
  .faq-grid{grid-template-columns:1fr}
  .theme-row,.directory-row{grid-template-columns:1fr}
  .mobile-bottom{position:fixed;left:0;right:0;bottom:0;z-index:70;display:grid;grid-template-columns:repeat(5,1fr);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;min-width:0;font-size:13px}
  .mobile-bottom a.is-active{background:var(--clay);color:var(--warm)}
  .search-layer{top:0;bottom:0;background:var(--deep-rock);padding:22px 16px;display:flex;align-items:flex-start}
  .search-card{width:100%;margin:52px 0 0;background:var(--deep-rock);border-color:rgba(247,243,235,.18);box-shadow:none;color:var(--warm)}
  .search-head strong,.search-head p{color:var(--warm)}
  .search-head button,.search-presets a{background:var(--warm);color:var(--deep-rock)}
  .footer-inner{padding-bottom:94px}
}
@media (max-width:560px){
  .top-inner,.header-inner,.footer-inner,.tabs-inner,.page-shell{width:calc(100% - 32px)}
  .top-inner{gap:8px}
  .top-inner>span{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:78%}
  .header-actions{gap:6px}
  .rock-drawer-button,.app-link-button{padding:0 12px}
  .shelf-grid,.card-wall,.shelf-page{grid-template-columns:1fr}
  .number-strip{grid-template-columns:48px 1fr;padding:15px}
  .number-strip .mark{font-size:18px}
  .letter-row{grid-template-columns:44px 1fr}
  .media-slot{height:168px}
  .media-wide{height:190px}
  .media-banner{height:220px}
  .media-app{height:320px}
  .section{padding:28px 0}
  .hero-intro{padding-top:24px}
  .page-shell{padding-bottom:42px}
  .drawer-scroll a{grid-template-columns:88px 1fr}
}