:root{--paper:#F3E8D4;--deep:#E2D2B4;--content:#FBF3E4;--soft:#EDE0C8;--ink:#1A140A;--text:#2C2214;--muted:#5C4A30;--assist:#7C6844;--gold:#7A5A20;--copper:#B88838;--border:rgba(26,20,10,.12);--strong:rgba(122,90,32,.50);--shadow:0 12px 28px rgba(26,20,10,.10)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei","PingFang SC",Arial,sans-serif;font-size:15px;line-height:1.7;overflow-x:hidden;padding-top:116px}body.no-scroll{overflow:hidden}a{color:inherit;text-decoration:none}img{display:block;max-width:100%}button,input{font:inherit}button{cursor:pointer}.shell{width:min(960px,calc(100% - 32px));margin:0 auto}
.top-strip{position:fixed;inset:0 0 auto;z-index:1000;height:20px;background:var(--ink);color:var(--copper);font-size:12px}.top-strip-inner{height:20px;display:flex;align-items:center;justify-content:space-between}.text-button{height:20px;padding:0;border:0;background:none;color:var(--copper)}
.site-header{position:fixed;top:20px;left:0;right:0;z-index:999;height:54px;background:var(--content);border-bottom:1px solid var(--strong)}.header-row{height:54px;display:flex;align-items:center;justify-content:space-between}.brand-link{display:flex;align-items:center;min-width:44px;min-height:44px}.brand-logo{height:24px;width:auto;object-fit:contain}.brand-fallback{font-size:16px;font-weight:800;color:var(--ink)}.header-actions{display:flex;gap:8px;align-items:center}.header-app,.drawer-toggle{height:44px;display:inline-flex;align-items:center;justify-content:center;border-radius:9px;font-size:14px}.header-app{padding:0 14px;border:1px solid var(--strong);background:var(--content)}.drawer-toggle{gap:8px;padding:0 12px;border:0;background:linear-gradient(135deg,#1A140A 0%,#B88838 100%);color:var(--content)}.drawer-mark{width:14px;height:10px;border-top:1px solid currentColor;border-bottom:1px solid currentColor;position:relative}.drawer-mark:after{content:"";position:absolute;left:0;right:0;top:4px;border-top:1px solid currentColor}
.quick-nav{position:fixed;top:74px;left:0;right:0;z-index:998;height:42px;background:var(--content);border-bottom:1px solid var(--border)}.quick-nav-inner{height:42px;display:flex;justify-content:flex-end;gap:26px}.quick-item{font-size:13px;display:flex;flex-direction:column;align-items:center;padding-top:6px;color:var(--muted);line-height:1.15}.quick-dot{width:8px;height:8px;border-radius:50%;border:1px solid var(--ink);margin-bottom:3px}.quick-item.current .quick-dot{background:var(--copper);border-color:var(--copper)}.quick-item.current{color:var(--ink)}
.overlay{position:fixed;inset:0;z-index:1100;background:rgba(26,20,10,.38);opacity:0;visibility:hidden;pointer-events:none;transition:.2s}.overlay.is-open{opacity:1;visibility:visible;pointer-events:auto}.site-drawer{position:fixed;left:20px;bottom:24px;z-index:1200;width:240px;max-height:380px;background:var(--content);border:1px solid var(--strong);border-radius:12px;box-shadow:var(--shadow);transform:translateY(24px);opacity:0;visibility:hidden;pointer-events:none;transition:.22s}.site-drawer.is-open{transform:none;opacity:1;visibility:visible;pointer-events:auto}.drawer-head{display:flex;align-items:center;justify-content:space-between;padding:12px;border-bottom:1px solid var(--border)}.drawer-brand{display:flex;align-items:center;gap:8px}.close-button{min-height:40px;border:1px solid var(--strong);background:var(--content);color:var(--ink);border-radius:8px;padding:0 11px}.drawer-scroll{max-height:320px;overflow:auto;padding:8px 10px 12px}.drawer-scroll section+section{margin-top:8px;padding-top:8px;border-top:1px solid var(--border)}.drawer-scroll h2{font-size:12px;color:var(--gold);margin:0 0 5px}.drawer-scroll a{display:block;padding:7px 6px;border-radius:8px}.drawer-scroll a:hover,.drawer-scroll a:focus-visible{background:var(--soft)}.drawer-scroll strong{display:block;font-size:13px}.drawer-scroll span{display:block;font-size:11px;line-height:1.45;color:var(--muted)}
.search-panel{position:fixed;top:74px;left:0;right:0;z-index:1150;opacity:0;visibility:hidden;pointer-events:none;transform:translateY(-8px);transition:.2s}.search-panel.is-open{opacity:1;visibility:visible;pointer-events:auto;transform:none}.search-card{width:min(620px,calc(100% - 32px));margin:10px auto 0;background:var(--content);border:1px solid var(--strong);box-shadow:var(--shadow);border-radius:12px;padding:16px}.search-head{display:flex;justify-content:space-between;align-items:center}.search-card label{display:block;margin:10px 0 6px;color:var(--muted)}.search-card input{width:100%;min-height:44px;border:1px solid var(--strong);border-radius:8px;background:#fffaf0;color:var(--ink);padding:0 12px}.search-links{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}.search-links a{min-height:40px;display:inline-flex;align-items:center;border:1px solid var(--border);border-radius:999px;padding:0 14px;background:var(--soft)}
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.btn{min-height:42px;display:inline-flex;align-items:center;justify-content:center;border-radius:9px;padding:0 16px;font-size:14px;font-weight:700}.btn.primary{background:linear-gradient(135deg,#1A140A 0%,#B88838 100%);color:var(--content)}.btn.secondary{background:var(--content);border:1px solid var(--gold)}a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--gold);outline-offset:3px}.section-block{padding:48px 0}.soft-bg{background:var(--soft)}.deep-soft{background:var(--deep)}
.media-slot{background:var(--content);border:1px solid var(--border);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}.wide-slot{height:220px;margin-bottom:22px}.wide-slot.short{height:168px}.card-media{height:190px}.clip-media{height:210px}.shelf-head{height:170px}.period-media{height:220px}.timeline-media{height:150px}.app-tall{height:300px;max-width:260px;width:100%}.icon-slot{width:64px;height:64px}.icon-slot img{width:48px;height:48px}.standalone-icon{margin:16px auto}.banner-slot{height:200px}.brand-cover{height:220px}
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.center-hero{text-align:center}.cut-sections{display:grid;gap:12px}.cut-sections article{display:grid;grid-template-columns:48px 1fr;gap:18px;padding:18px 0;border-bottom:1px solid var(--border)}.cut-sections article>span{font-size:24px;color:var(--copper);font-weight:800}.prose-flow{max-width:760px}.prose-flow article{padding:0 0 24px 28px;border-left:1px solid var(--copper);position:relative}.prose-flow article:before{content:"";width:9px;height:9px;border-radius:50%;background:var(--copper);position:absolute;left:-5px;top:7px}.period-page,.status-page,.method-steps,.topic-list,.policy-sections,.app-feature-stack,.faq-full{display:grid;gap:16px}.period-page article{display:grid;grid-template-columns:120px 1fr;gap:22px;padding:20px;background:var(--content);border:1px solid var(--border);border-radius:11px}.period-number{font-size:22px;font-weight:800;color:var(--gold)}.status-bar{display:grid;grid-template-columns:120px 1fr;gap:22px;background:var(--content);border:1px solid var(--border);border-radius:10px;padding:18px}.status-bar>strong{display:flex;align-items:flex-start;justify-content:center;padding:8px;border-radius:7px;background:var(--ink);color:var(--content)}.checklist-page,.centered-cards,.install-grid,.grade-list,.help-layout,.contact-lanes{display:grid;grid-template-columns:1fr 1fr;gap:18px}.checklist-page>section,.centered-cards article,.install-grid article,.grade-list article,.help-layout article,.contact-lanes article,.policy-sections article,.app-feature-stack article{background:var(--content);border:1px solid var(--border);border-radius:10px;padding:20px}.checklist{list-style:none;padding:0;margin:0;display:grid;gap:12px}.checklist li{padding-left:18px;position:relative}.checklist li:before{content:"";position:absolute;left:0;top:9px;width:7px;height:7px;border-radius:50%;background:var(--copper)}.checklist strong,.checklist span{display:block}.checklist span{font-size:13px;color:var(--muted)}.method-steps article,.topic-list article,.faq-item{display:grid;grid-template-columns:60px 1fr;gap:18px;background:var(--content);border:1px solid var(--border);border-radius:10px;padding:18px}.method-steps article>span,.topic-index{width:42px;height:42px;border-radius:50%;background:var(--ink);color:var(--copper);display:flex;align-items:center;justify-content:center;font-weight:800}.topic-list a,.help-layout a,.centered-cards a{color:var(--gold);font-weight:700}.centered-cards{max-width:820px}.centered-cards article{text-align:center}.app-feature-stack{max-width:820px}.app-feature-stack article{border-left:4px solid var(--copper)}.install-grid article>span{font-size:12px;color:var(--gold);font-weight:800}.privacy-variant article:nth-child(even){margin-left:7%}.advice,.contact-note{border-top:1px solid var(--border);padding-top:10px;color:var(--muted);font-size:13px}.faq-no{color:var(--copper);font-weight:800;font-size:20px}.about-statement{display:grid;gap:20px}.about-statement article{display:grid;grid-template-columns:180px 1fr 1fr;gap:18px;padding:20px 0;border-bottom:1px solid var(--border)}.about-signoff{display:grid;grid-template-columns:1fr 1fr;gap:24px;align-items:center}.prose-block{max-width:780px}
.site-footer{background:var(--ink);color:var(--paper);border-top:1px solid var(--copper);padding:34px 0 24px;font-size:13px}.footer-brand{display:flex;align-items:center;gap:9px;margin-bottom:20px}.footer-brand strong{color:var(--copper)}.footer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;padding-bottom:20px;border-bottom:1px solid rgba(184,136,56,.28)}.footer-grid h2{font-size:13px;color:var(--copper);margin-bottom:8px}.footer-grid a{display:block;min-height:30px}.footer-note{color:#d9c8aa;max-width:780px;margin:16px 0 6px}.copyright{color:#bda987}.mobile-bottom{display:none}
@media(max-width:760px){body{padding-top:74px;padding-bottom:calc(48px + env(safe-area-inset-bottom))}.quick-nav{display:none}.header-actions{gap:4px}.header-app,.drawer-toggle{padding:0 9px}.site-drawer{left:6%;bottom:calc(58px + env(safe-area-inset-bottom));width:88%;max-height:70vh}.drawer-scroll{max-height:calc(70vh - 58px)}.search-panel{top:0;bottom:0;background:var(--ink);padding-top:34px}.search-card{width:calc(100% - 32px);margin:0 auto;background:var(--ink);color:var(--paper);border-color:var(--copper)}.search-card label,.search-head strong{color:var(--copper)}.search-links a{background:transparent;color:var(--paper);border-color:var(--copper)}.mobile-bottom{display:grid;grid-template-columns:repeat(4,1fr);position:fixed;left:0;right:0;bottom:0;z-index:1090;height:calc(48px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);background:var(--ink);border-top:1px solid var(--copper)}.mobile-bottom a{display:flex;align-items:center;justify-content:center;min-height:48px;color:var(--paper);font-size:13px}.mobile-bottom a.current{background:var(--copper);color:var(--ink);font-weight:800}.section-block{padding:38px 0}.wide-slot{height:180px}.wide-slot.short{height:150px}.triple-layout,.triple-page,.two-note-grid,.period-layout,.method-panel,.brand-story,.related-path,.checklist-page,.centered-cards,.install-grid,.grade-list,.help-layout,.contact-lanes,.about-signoff{grid-template-columns:1fr}.method-panel .text-link,.brand-story .text-link{grid-column:auto}.clip-card,.clip-card.reverse{grid-template-columns:1fr;margin-left:0}.clip-card.offset{margin-left:0}.timeline-head{align-items:flex-start;flex-direction:column}.status-list>div{grid-template-columns:84px 1fr}.period-page article,.status-bar,.method-steps article,.topic-list article,.faq-item{grid-template-columns:1fr}.privacy-variant article:nth-child(even){margin-left:0}.about-statement article{grid-template-columns:1fr;gap:4px}.footer-grid{grid-template-columns:1fr 1fr}}

.content-cards-v2{display:grid;grid-template-columns:1fr 1fr;gap:18px}.content-cards-v2 article{background:var(--content);border:1px solid var(--border);border-radius:10px;padding:20px}.content-cards-v2 article:nth-child(5n){grid-column:1/-1}@media(max-width:760px){.content-cards-v2{grid-template-columns:1fr}.content-cards-v2 article:nth-child(5n){grid-column:auto}}