:root{
  --bean-light:#F3E6C8;--bean-deep:#5A3C16;--shell:#8A5A22;--sprout:#6A7A38;--rice:#FFF8E8;
  --layer:#E4D2A8;--soft:#F7EDD4;--title:#3A2A12;--text:#4A3418;--muted:#7A5A28;--faint:#A08048;
  --line:rgba(90,60,22,.16);--line-strong:rgba(90,60,22,.42);--shadow:0 12px 28px rgba(58,42,18,.08);
  --max:1080px;
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bean-light);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",Arial,sans-serif;font-size:15px;line-height:1.7;overflow-x:hidden}.ui-locked{overflow:hidden}a{color:inherit;text-decoration:none}button{font:inherit}.shell-inner{width:min(var(--max),calc(100% - 32px));margin:0 auto}.site-shell{position:fixed;left:0;right:0;top:0;z-index:50}.sprout-line{height:22px;background:var(--bean-deep);color:var(--rice);font-size:12px}.sprout-line-inner{height:22px;display:flex;align-items:center;justify-content:space-between}.text-button,.drawer-button,[data-drawer-close],[data-search-close]{border:0;background:transparent;color:inherit;cursor:pointer;min-height:44px;padding:0 10px}.sprout-line .text-button{min-height:22px;height:22px;padding:0 2px}.pod-bar{height:56px;background:var(--bean-light);border-bottom:1px solid var(--line-strong)}.pod-bar-inner{height:56px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:14px}.brand-link{justify-self:start;display:inline-flex;align-items:center;min-height:44px;font-size:16px;font-weight:800;color:var(--title)}.brand-link img,.drawer-brand img,.footer-logo-row img{height:26px;max-width:150px;object-fit:contain}.app-entry{min-height:44px;display:inline-flex;align-items:center;justify-content:center;padding:0 16px;border:1px solid var(--shell);border-radius:10px;background:var(--rice);color:var(--bean-deep);font-size:14px}.drawer-button{justify-self:end;color:var(--bean-deep);font-weight:700}.ridge-tabs{height:38px;background:var(--rice);border-bottom:1px solid var(--line)}.ridge-tabs-inner{height:38px;display:flex;align-items:center;justify-content:space-between}.ridge-group{display:flex;gap:6px}.ridge-tabs a{height:30px;display:flex;align-items:center;padding:0 12px;border-radius:8px;font-size:13px;color:var(--bean-deep)}.ridge-tabs a.is-current{background:var(--bean-deep);color:var(--rice)}.site-main{padding-top:132px;padding-bottom:40px}.page-shell{width:min(var(--max),calc(100% - 32px));margin:0 auto}.hero-intro,.page-hero{padding:42px 0 28px}.eyebrow{font-size:13px;color:var(--sprout);font-weight:800;letter-spacing:.08em}.hero-intro h1,.page-hero h1{font-size:24px;line-height:1.3;color:var(--title);margin:8px 0 10px}.hero-intro .lead,.page-hero .lead{max-width:760px;font-size:16px;color:var(--muted)}h2{font-size:20px;line-height:1.4;color:var(--title);margin:0 0 12px}h3{font-size:16px;line-height:1.45;color:var(--title);margin:0 0 8px}p{margin:0 0 14px}.btn-primary,.btn-secondary{min-height:42px;display:inline-flex;align-items:center;justify-content:center;border-radius:10px;padding:0 18px;font-size:14px;font-weight:700;white-space:nowrap}.btn-primary{background:linear-gradient(135deg,#8A5A22 0%,#5A3C16 100%);color:var(--rice)}.btn-secondary{background:var(--rice);border:1px solid var(--shell);color:var(--bean-deep)}a:hover{opacity:.88}a:focus-visible,button:focus-visible{outline:3px solid rgba(106,122,56,.35);outline-offset:3px}.section{margin:0 0 28px}.panel{background:var(--rice);border:1px solid var(--line);border-radius:12px;padding:22px;box-shadow:var(--shadow)}.media-slot{background:var(--soft);border:1px solid var(--line);border-radius:10px;display:flex;align-items:center;justify-content:center;overflow:hidden}.media-slot img{width:100%;height:100%;object-fit:contain;object-position:center}.banner-slot{height:200px}.card-slot{height:140px}.article-slot{height:180px}.app-slot{height:320px}.small-icon-slot{width:64px;height:64px}.quad-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.quad-card{background:var(--rice);border:1px solid var(--line);border-radius:12px;padding:14px}.quad-card .media-slot{margin-bottom:14px}.longread{background:var(--rice);border:1px solid var(--line);border-radius:12px;padding:24px}.ordinal{display:inline-flex;background:var(--soft);color:var(--shell);border:1px solid var(--line);border-radius:999px;padding:2px 9px;font-size:12px;margin-bottom:8px}.timeline{position:relative;padding-left:22px}.timeline:before{content:"";position:absolute;left:6px;top:8px;bottom:8px;width:2px;background:var(--line-strong)}.timeline-item{position:relative;background:var(--rice);border:1px solid var(--line);border-radius:10px;padding:18px 18px 18px 20px;margin-bottom:14px}.timeline-item:before{content:"";position:absolute;left:-22px;top:24px;width:12px;height:12px;border-radius:50%;background:var(--sprout);border:3px solid var(--bean-light)}.split-notes{display:grid;grid-template-columns:1fr 1fr;gap:18px}.note-column{background:var(--rice);border:1px solid var(--line);border-radius:12px;padding:20px}.theme-strips{display:grid;gap:10px}.theme-strip{display:grid;grid-template-columns:160px 1fr auto;gap:16px;align-items:center;background:var(--rice);border-left:5px solid var(--shell);border-radius:10px;padding:15px 18px;border-top:1px solid var(--line);border-right:1px solid var(--line);border-bottom:1px solid var(--line)}.status{font-size:12px;color:var(--sprout);font-weight:800;white-space:nowrap}.app-feature{display:grid;grid-template-columns:minmax(250px,360px) 1fr;gap:28px;align-items:center}.app-copy .small-icon-slot{margin-bottom:12px}.text-columns{column-count:2;column-gap:28px}.faq-mini{display:grid;gap:10px}.faq-mini details,.faq-list details{background:var(--rice);border:1px solid var(--line);border-radius:10px;padding:14px 16px}.faq-mini summary,.faq-list summary{cursor:pointer;font-weight:800;color:var(--title)}.page-section{margin:0 0 22px}.prose{background:var(--rice);border:1px solid var(--line);border-radius:12px;padding:26px}.prose p+p{margin-top:8px}.observation-directory{display:grid;grid-template-columns:220px 1fr;gap:22px}.observation-index{background:var(--layer);border-radius:12px;padding:18px;align-self:start;position:sticky;top:148px}.observation-index a{display:block;padding:10px 8px;border-bottom:1px solid var(--line);font-weight:700}.observation-chapter{background:var(--rice);border:1px solid var(--line);border-radius:12px;padding:24px;margin-bottom:16px}.memo-split{display:grid;grid-template-columns:1fr 1fr;gap:20px}.memo-card{background:var(--rice);border:1px solid var(--line);border-radius:12px;padding:22px}.checklist{display:grid;gap:14px}.check-item{background:var(--rice);border:1px solid var(--line);border-radius:10px;padding:18px 18px 18px 48px;position:relative}.check-item:before{content:"✓";position:absolute;left:16px;top:18px;width:22px;height:22px;border-radius:50%;display:grid;place-items:center;background:var(--sprout);color:#fff;font-size:12px}.method-list{counter-reset:method;display:grid;gap:16px}.method-card{counter-increment:method;background:var(--rice);border:1px solid var(--line);border-radius:12px;padding:20px 20px 20px 64px;position:relative}.method-card:before{content:counter(method);position:absolute;left:18px;top:18px;width:30px;height:30px;border-radius:50%;display:grid;place-items:center;background:var(--bean-deep);color:var(--rice);font-weight:800}.topic-list{display:grid;gap:14px}.topic-row{background:var(--rice);border:1px solid var(--line);border-radius:12px;padding:20px;display:grid;grid-template-columns:190px 1fr;gap:22px}.terms section{background:var(--rice);border:1px solid var(--line);border-radius:10px;padding:20px;margin-bottom:14px}.contact-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.contact-card{background:var(--rice);border:1px solid var(--line);border-radius:12px;padding:20px}.site-footer{background:#2E220E;color:var(--bean-light);border-top:1px solid rgba(243,230,200,.18);padding:34px 0 70px;font-size:13px}.footer-grid{display:grid;grid-template-columns:2fr repeat(4,1fr);gap:24px}.footer-grid h2{color:var(--rice);font-size:14px;margin-bottom:10px}.footer-grid a{display:block;color:var(--bean-light);padding:4px 0}.footer-brand p{max-width:400px;color:#e9d9b6}.footer-logo-row{display:flex;gap:10px;align-items:center;margin-bottom:12px}.footer-logo-row div{display:flex;flex-direction:column}.footer-logo-row span{font-size:11px;color:#d8c49e}.footer-bottom{border-top:1px solid rgba(243,230,200,.16);margin-top:24px;padding-top:16px;color:#d8c49e}.site-overlay{position:fixed;inset:0;background:rgba(46,34,14,.45);z-index:80;opacity:0;visibility:hidden;pointer-events:none;transition:.2s}.site-overlay.is-active{opacity:1;visibility:visible;pointer-events:auto}.pod-drawer{position:fixed;z-index:90;top:0;right:0;width:min(380px,88vw);height:100dvh;background:var(--rice);transform:translateX(100%);visibility:hidden;pointer-events:none;transition:transform .22s ease,visibility .22s}.pod-drawer.is-open{transform:translateX(0);visibility:visible;pointer-events:auto}.drawer-head{height:72px;display:flex;align-items:center;justify-content:space-between;padding:0 16px;border-bottom:1px solid var(--line)}.drawer-brand{display:flex;align-items:center;gap:9px}.drawer-brand div{display:flex;flex-direction:column}.drawer-brand span{font-size:11px;color:var(--faint)}.drawer-scroll{height:calc(100dvh - 72px);overflow:auto;padding:14px 16px 34px}.drawer-scroll section{margin-bottom:18px}.drawer-scroll h2{font-size:14px;color:var(--shell);margin-bottom:8px}.drawer-scroll a{display:block;padding:10px 0;border-bottom:1px solid var(--line)}.drawer-scroll a strong,.drawer-scroll a span{display:block}.drawer-scroll a span{font-size:12px;color:var(--muted)}.search-layer{position:fixed;z-index:95;top:78px;left:0;right:0;visibility:hidden;pointer-events:none}.search-layer.is-open{visibility:visible;pointer-events:auto}.search-card{width:min(760px,calc(100% - 32px));margin:12px auto;background:var(--rice);border:1px solid var(--line-strong);border-radius:12px;box-shadow:var(--shadow);padding:20px}.search-head{display:flex;justify-content:space-between;align-items:center;gap:14px}.search-head h2{margin:0}.search-presets{display:flex;flex-wrap:wrap;gap:10px}.search-presets a{display:inline-flex;align-items:center;min-height:44px;padding:0 15px;border:1px solid var(--shell);border-radius:999px;color:var(--bean-deep);background:var(--soft)}.mobile-bottom{display:none}
@media(max-width:760px){.shell-inner,.page-shell{width:calc(100% - 32px)}.ridge-tabs{display:none}.site-main{padding-top:78px;padding-bottom:72px}.hero-intro,.page-hero{padding:28px 0 20px}.quad-grid,.split-notes,.memo-split,.contact-grid{grid-template-columns:1fr}.theme-strip{grid-template-columns:1fr;gap:6px}.app-feature{grid-template-columns:1fr}.app-slot{height:300px}.text-columns{column-count:1}.observation-directory{grid-template-columns:1fr}.observation-index{position:static}.topic-row{grid-template-columns:1fr;gap:8px}.footer-grid{grid-template-columns:1fr 1fr}.footer-brand{grid-column:1/-1}.site-footer{padding-bottom:88px}.mobile-bottom{display:grid;position:fixed;z-index:60;left:0;right:0;bottom:0;grid-template-columns:repeat(5,1fr);height:calc(48px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);background:var(--rice);border-top:1px solid var(--line-strong)}.mobile-bottom a{display:flex;align-items:center;justify-content:center;font-size:12px;min-width:0}.mobile-bottom a.is-current{background:var(--bean-deep);color:var(--rice)}.pod-bar-inner{grid-template-columns:minmax(0,1fr) auto auto}.brand-link{max-width:135px;overflow:hidden}.brand-link span{white-space:nowrap}.app-entry{padding:0 10px}.search-layer{top:0;bottom:0;background:var(--bean-deep)}.search-card{width:100%;height:100%;margin:0;border:0;border-radius:0;background:var(--bean-deep);color:var(--rice);padding:24px 16px}.search-card h2,.search-card p{color:var(--rice)}.search-presets a{background:transparent;border-color:rgba(255,248,232,.55);color:var(--rice)}[data-search-close]{color:var(--rice)}.banner-slot{height:180px}.footer-grid{gap:18px}.footer-grid>div:nth-child(5){grid-column:1/-1}}