*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:#F6EDE4;color:#2A241C;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",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%;object-fit:contain;object-position:center}
:focus-visible{outline:2px solid #E07030;outline-offset:3px}
.top-strip{position:fixed;z-index:70;top:0;left:0;right:0;height:20px;background:#1A1612;color:#F6EDE4;font-size:12px}
.top-strip-inner,.site-header-inner,.quick-nav-inner,.footer-inner{width:min(960px,calc(100% - 32px));margin:0 auto}
.top-strip-inner{height:20px;display:flex;align-items:center;justify-content:space-between}
.text-button{border:0;background:transparent;color:#F6EDE4;padding:0 4px;min-height:20px}
.site-header{position:fixed;z-index:68;top:20px;left:0;right:0;height:54px;background:#FFF8F2;border-bottom:1px solid rgba(224,112,48,.5)}
.site-header-inner{height:54px;display:flex;align-items:center;justify-content:space-between}
.brand-link{height:44px;min-width:44px;display:flex;align-items:center}
.brand-logo,.footer-logo{height:24px;width:auto;max-width:160px;object-fit:contain}
.brand-fallback{font-size:16px;font-weight:800;color:#1A1612}
.header-actions{display:flex;gap:8px;align-items:center}
.app-link,.menu-button{min-height:44px;display:inline-flex;align-items:center;justify-content:center;border-radius:4px;padding:0 14px;font-size:14px}
.app-link{background:linear-gradient(135deg,#1A1612 0%,#E07030 100%);color:#FFF8F2}
.menu-button{border:1px solid #E07030;background:#FFF8F2;color:#1A1612}
.quick-nav{position:fixed;z-index:66;top:74px;left:0;right:0;height:46px;background:#FFF8F2;border-bottom:1px solid rgba(26,22,18,.12)}
.quick-nav-inner{height:46px;display:flex;align-items:center;gap:30px}
.quick-nav a{display:inline-flex;align-items:center;gap:8px;min-height:44px;font-size:13px}
.quick-square{width:18px;height:18px;border:1px solid #1A1612;border-radius:2px;background:#FFF8F2}
.quick-nav a.is-current .quick-square{background:#E07030;border-color:#E07030}
.site-main{width:min(960px,calc(100% - 32px));margin:0 auto;padding:144px 0 64px}
h1,h2,h3,p{margin-top:0}
h1{font-size:24px;line-height:1.3;color:#1A1612;margin-bottom:16px}
h2{font-size:20px;line-height:1.35;color:#1A1612;margin-bottom:14px}
h3{font-size:16px;line-height:1.45;color:#1A1612;margin-bottom:8px}
p{margin-bottom:14px}
.eyebrow{font-size:13px;color:#B06030;font-weight:700;letter-spacing:.04em}
.lead{font-size:16px;color:#5A5048;max-width:760px}
.muted{color:#7A7068}
.page-head{margin-bottom:32px}
.page-head .lead{margin-bottom:0}
.section{margin:38px 0}
.soft-panel,.content-card,.note-card,.status-row,.center-card,.term-block,.method-block,.topic-row{background:#FFF8F2;border:1px solid rgba(26,22,18,.12);border-radius:4px;box-shadow:0 12px 28px rgba(26,22,18,.10)}
.soft-panel,.content-card,.note-card,.center-card,.term-block,.method-block{padding:22px}
.primary-button,.secondary-button{min-height:42px;display:inline-flex;align-items:center;justify-content:center;border-radius:4px;padding:0 18px;font-size:14px}
.primary-button{background:linear-gradient(135deg,#1A1612 0%,#E07030 100%);color:#FFF8F2}
.secondary-button{background:#FFF8F2;border:1px solid #E07030;color:#1A1612}
.button-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
.index-chips{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:18px}
.index-chips span{display:inline-flex;align-items:center;min-height:30px;padding:0 10px;background:#E07030;color:#FFF8F2;border-radius:3px;font-size:13px}
.image-slot{background:#FFF8F2;border:1px solid rgba(224,112,48,.5);border-radius:4px;display:flex;align-items:center;justify-content:center;min-height:120px;overflow:hidden}
.image-slot img{width:100%;height:100%}
.slant-layout{display:grid;grid-template-columns:minmax(0,300px) 1fr;gap:28px;align-items:center}
.slant-layout .image-slot{height:176px;clip-path:polygon(0 0,100% 0,90% 100%,0 100%)}
.dual-cards{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.dual-cards .image-slot{height:190px;margin-bottom:16px}
.volume-pages{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.volume-pages article{background:#F0E4D6;border-left:4px solid #E07030;padding:22px;min-height:210px}
.volume-pages .image-slot{height:170px;margin-bottom:16px;background:#FFF8F2}
.shelf-intro{display:grid;grid-template-columns:220px 1fr;gap:22px;align-items:center}
.shelf-intro .image-slot{height:180px}
.shelf-cards{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.timeline-three{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.timeline-three article{background:#1A1612;color:#F6EDE4;border-radius:4px;padding:20px}
.timeline-three h3{color:#FFF8F2}
.timeline-three .image-slot{height:140px;margin-bottom:14px;background:#FFF8F2;border-color:rgba(224,112,48,.5)}
.status-list{display:grid;gap:10px}
.status-row{display:grid;grid-template-columns:120px 1fr auto;gap:14px;align-items:center;padding:15px 18px}
.status-badge{font-size:13px;border:1px solid #E07030;border-radius:3px;padding:4px 8px;color:#1A1612;background:#FFF8F2;white-space:nowrap}
.app-split{display:grid;grid-template-columns:minmax(0,280px) 1fr;gap:30px;align-items:center}
.app-split .image-slot.app-portrait{height:320px}
.app-icon-wrap{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.app-icon-wrap .image-slot{width:48px;height:48px;min-height:48px}
.app-icon-wrap .image-slot img{width:48px;height:48px}
.long-list{display:grid;gap:14px}
.long-list article{padding:18px 0;border-bottom:1px solid rgba(26,22,18,.12)}
.long-list article:last-child{border-bottom:0}
.faq-list{display:grid;gap:14px}
.faq-item{background:#FFF8F2;border:1px solid rgba(26,22,18,.12);padding:18px 20px;border-radius:4px}
.faq-item h2,.faq-item h3{margin-bottom:8px}
.single-column{max-width:760px}
.check-list{list-style:none;padding:0;margin:0;display:grid;gap:12px}
.check-list li{background:#FFF8F2;border-left:3px solid #E07030;padding:14px 16px}
.method-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.topic-list{display:grid;gap:12px}
.topic-row{padding:18px;display:grid;grid-template-columns:180px 1fr;gap:20px}
.center-stack{max-width:720px;margin-left:auto;margin-right:auto;text-align:center}
.center-stack .center-card{text-align:left;margin-bottom:14px}
.terms{display:grid;gap:14px}
.brand-banner{height:200px;margin-bottom:24px}
.brand-backup{height:220px;max-width:420px;margin:24px auto}
.quote-line{font-size:20px;line-height:1.45;font-weight:800;color:#1A1612;border-left:4px solid #E07030;padding-left:14px;margin:18px 0}
.site-footer{background:#1A1612;color:#F6EDE4;border-top:1px solid #E07030;font-size:13px;padding:34px 0 calc(34px + env(safe-area-inset-bottom))}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:24px}
.footer-brand strong{font-size:16px}
.footer-links{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.footer-links h2{font-size:14px;color:#FFF8F2;margin-bottom:8px}
.footer-links a{display:block;color:#F6EDE4;min-height:28px}
.footer-note{max-width:760px;color:#E8D8C8;margin:24px 0 8px}
.copyright{color:#E8D8C8;margin:0}
.overlay{position:fixed;z-index:80;inset:0;background:rgba(26,22,18,.48)}
.overlay[hidden]{display:none}
.menu-panel,.search-layer{position:fixed;z-index:90;visibility:hidden;pointer-events:none;opacity:0;transition:opacity .16s ease,transform .16s ease}
.menu-panel[aria-hidden="false"],.search-layer[aria-hidden="false"]{visibility:visible;pointer-events:auto;opacity:1}
.menu-panel{top:28px;left:50%;transform:translate(-50%,-12px);width:320px;max-height:360px;overflow:auto;background:#FFF8F2;border:1px solid rgba(224,112,48,.5);border-radius:6px;box-shadow:0 12px 28px rgba(26,22,18,.20)}
.menu-panel[aria-hidden="false"]{transform:translate(-50%,0)}
.menu-panel-head,.search-head{display:flex;justify-content:space-between;align-items:flex-start;gap:14px;padding:14px 16px;border-bottom:1px solid rgba(26,22,18,.12)}
.menu-brand{display:flex;align-items:center;gap:8px}.menu-brand img{height:24px;width:auto}
.panel-close{min-width:44px;min-height:44px;border:1px solid #E07030;background:#FFF8F2;color:#1A1612;border-radius:4px}
.menu-groups{padding:8px 16px 16px}
.menu-groups section{padding:10px 0;border-bottom:1px solid rgba(26,22,18,.12)}
.menu-groups section:last-child{border-bottom:0}
.menu-groups h2{font-size:13px;color:#B06030;margin-bottom:6px}
.menu-groups a{display:flex;align-items:baseline;justify-content:space-between;gap:10px;padding:6px 0}
.menu-groups a b{font-size:14px}.menu-groups a span{font-size:12px;color:#7A7068;text-align:right}
.search-layer{top:82px;left:50%;transform:translateX(-50%);width:min(620px,calc(100% - 32px))}
.search-card{background:#FFF8F2;border:1px solid rgba(224,112,48,.5);border-radius:6px;box-shadow:0 12px 28px rgba(26,22,18,.20)}
.search-head p{margin:2px 0 0;color:#5A5048}
.search-form{padding:16px}.search-form label{display:block;margin-bottom:6px;font-size:13px;color:#5A5048}
.search-row{display:grid;grid-template-columns:1fr auto;gap:8px}
.search-row input{min-height:44px;border:1px solid rgba(26,22,18,.24);background:#FFF8F2;color:#1A1612;border-radius:4px;padding:0 12px;min-width:0}
.search-row button{min-height:44px;border:0;border-radius:4px;padding:0 18px;background:linear-gradient(135deg,#1A1612 0%,#E07030 100%);color:#FFF8F2}
.search-presets{display:flex;flex-wrap:wrap;gap:8px;padding:0 16px 16px}
.search-presets a{border:1px solid #E07030;border-radius:4px;padding:8px 12px;min-height:40px}
.search-status{padding:0 16px 16px;color:#5A5048;margin:0}
.panel-open{overflow:hidden}
.mobile-bottom{display:none}
.orange-index{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:14px 0 22px}
.orange-index a{background:#E07030;color:#FFF8F2;padding:12px;border-radius:4px;min-height:54px;display:flex;align-items:center}
.asym-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:18px}
.asym-grid article:nth-child(2){margin-top:28px}
.rule-list{display:grid;gap:12px}
.rule-list article{border-bottom:1px solid rgba(26,22,18,.12);padding-bottom:12px}
.compact-hero{background:#F0E4D6;border-top:4px solid #E07030;padding:22px;margin-bottom:28px}
.vertical-steps{border-left:2px solid #E07030;padding-left:20px;display:grid;gap:18px}
.vertical-steps article{position:relative}
.vertical-steps article:before{content:"";position:absolute;left:-27px;top:8px;width:12px;height:12px;border-radius:50%;background:#E07030}
.help-columns{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.contact-band{background:#1A1612;color:#F6EDE4;padding:22px;border-radius:4px}
.contact-band h2{color:#FFF8F2}
@media (hover:hover){
a:hover{color:#B06030}
.primary-button:hover{filter:brightness(1.05);color:#FFF8F2}
.secondary-button:hover,.app-link:hover{filter:brightness(1.03)}
}
@media (max-width:700px){
.quick-nav{display:none}
.site-main{padding-top:94px;padding-bottom:82px}
.top-strip-inner,.site-header-inner,.footer-inner,.site-main{width:min(100% - 32px,960px)}
.header-actions{gap:6px}.app-link,.menu-button{padding:0 10px}
.dual-cards,.volume-pages,.timeline-three,.shelf-cards,.method-grid,.help-columns,.orange-index{grid-template-columns:1fr}
.slant-layout,.shelf-intro,.app-split,.topic-row,.asym-grid{grid-template-columns:1fr}
.slant-layout .image-slot{width:min(300px,100%)}
.status-row{grid-template-columns:1fr}.status-badge{justify-self:start}
.footer-links{grid-template-columns:1fr 1fr}
.site-footer{padding-bottom:calc(82px + env(safe-area-inset-bottom))}
.mobile-bottom{position:fixed;z-index:65;left:0;right:0;bottom:0;height:calc(48px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);display:grid;grid-template-columns:repeat(4,1fr);background:#FFF8F2;border-top:1px solid rgba(26,22,18,.12)}
.mobile-bottom a{display:flex;align-items:center;justify-content:center;min-height:48px;font-size:13px}
.mobile-bottom a.is-current{background:#E07030;color:#1A1612}
.menu-panel{width:88%;top:28px}
.search-layer{inset:0;width:100%;transform:none;background:#1A1612;color:#F6EDE4;padding:72px 16px 64px;overflow:auto}
.search-card{background:#1A1612;color:#F6EDE4;border-color:#E07030;box-shadow:none}
.search-head strong,.search-head p,.search-form label{color:#F6EDE4}
.search-row input{background:#FFF8F2;color:#1A1612}
.search-presets a{color:#F6EDE4}
.search-status{color:#E8D8C8}
.footer-links{gap:12px}
}
@media (max-width:380px){
.app-link,.menu-button{font-size:13px;padding:0 8px}
.footer-links{grid-template-columns:1fr}
}