:root{--bg:#0C0B08;--bg-deep:#080706;--panel:#161410;--panel-2:#1E1A14;--title:#F3E6C0;--text:#E4D6B0;--muted:#B89A58;--soft:#8A7040;--gold:#C9A227;--gold-light:#E0C056;--gold-deep:#8A6E18;--copper:#8A5A2A;--cream:#F7EFD4;--line:rgba(201,162,39,.22);--line-strong:rgba(201,162,39,.50);--shadow:0 12px 28px rgba(0,0,0,.45);--content:980px;--side:148px}
*{box-sizing:border-box}html{scroll-behavior:smooth;overflow-x:hidden}body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;font-size:15px;line-height:1.7;overflow-x:hidden}body.is-locked{overflow:hidden}a{color:inherit;text-decoration:none}button,input{font:inherit}button{cursor:pointer}img{display:block;max-width:100%;height:auto}p{margin:0 0 1em}h1,h2,h3{margin:0;color:var(--title);font-weight:700;letter-spacing:.02em}h1{font-size:24px;line-height:1.3}h2{font-size:20px;line-height:1.4}h3{font-size:16px;line-height:1.5}.skip-link{position:fixed;left:12px;top:-60px;z-index:200;background:var(--cream);color:#1A1408;padding:10px 14px;border-radius:6px}.skip-link:focus{top:10px}.museum-notice,.museum-header,.double-nav{position:fixed;left:0;right:0;z-index:90}.museum-notice{top:0;height:20px;background:var(--bg-deep);color:var(--title);font-size:12px;border-bottom:1px solid rgba(201,162,39,.12)}.museum-header{top:20px;height:52px;background:#0b0906;border-bottom:1px solid var(--gold);box-shadow:0 6px 20px rgba(0,0,0,.22)}.double-nav{top:72px;height:64px;background:#0a0907;border-bottom:1px solid var(--line)}.bar-inner,.double-nav-inner,.footer-inner{width:min(100% - 32px,calc(var(--content) + var(--side) + 40px));margin:0 auto}.bar-inner{height:100%;display:flex;align-items:center;justify-content:space-between}.header-inner{gap:16px}.text-button,.menu-button,.sheet-close,.search-head button{border:0;background:transparent;color:var(--title);min-height:44px;padding:0 8px}.text-button{font-size:12px;min-height:20px}.brand-mark{display:flex;align-items:center;min-height:44px;min-width:132px}.brand-logo-slot{display:flex;align-items:center;justify-content:flex-start}.small-logo-slot{min-height:24px}.brand-logo{height:24px;width:auto;max-width:160px;object-fit:contain;object-position:center}.brand-fallback{color:var(--title);font-weight:700;font-size:16px;white-space:nowrap}.brand-en{color:var(--title);font-size:13px;letter-spacing:.12em;flex:1;text-align:center}.header-actions{display:flex;align-items:center;gap:8px}.header-app-link,.menu-button{min-height:44px;display:inline-flex;align-items:center;justify-content:center;color:var(--title);padding:0 10px}.menu-button{border-left:1px solid var(--line)}.double-nav-inner{height:64px;display:grid;grid-template-rows:32px 32px}.nav-row{display:flex;align-items:center;gap:26px}.nav-link{height:32px;display:inline-flex;align-items:center;color:var(--text);font-size:13px;border-bottom:2px solid 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var(--line);margin-bottom:28px}.eyebrow{display:block;color:var(--gold-light);font-size:12px;letter-spacing:.14em;margin-bottom:8px}.lede{max-width:760px;margin:12px 0 0;color:var(--text);font-size:15px}.hero-line{font-size:18px;color:var(--gold-light);margin-top:10px}.button-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}.btn{height:42px;padding:0 18px;border-radius:8px;display:inline-flex;align-items:center;justify-content:center;font-size:14px;font-weight:700;white-space:nowrap}.btn-primary{background:linear-gradient(135deg,#E0C056 0%,#C9A227 55%,#8A6E18 100%);color:#1A1408;border:1px solid transparent}.btn-secondary{background:#0d0b08;color:var(--title);border:1px solid var(--gold-light)}.btn:hover{transform:translateY(-1px)}.btn:focus-visible,.header-app-link:focus-visible,.menu-button:focus-visible,.text-button:focus-visible,a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--gold-light);outline-offset:3px}.content-section{margin:0 0 34px;padding-top:2px}.section-kicker{display:block;color:var(--muted);font-size:12px;margin-bottom:5px}.content-section>h2{margin-bottom:14px}.content-section>p,.prose p{color:var(--text)}.notice-box{border:1px solid var(--line);background:var(--panel);padding:18px;border-radius:8px}.gold-rule{height:1px;background:linear-gradient(90deg,var(--gold),transparent);margin:22px 0}.picture-slot{display:flex;align-items:center;justify-content:center;background:#090806;border:1px solid var(--line);border-radius:8px;overflow:hidden}.picture-slot img{width:100%;height:100%;object-fit:contain;object-position:center}.slot-176{height:176px}.slot-160{height:160px}.slot-200{height:200px}.slot-app{min-height:220px;max-height:320px}.slot-app img{max-height:320px}.slot-head{height:170px}.numbered-scenes{counter-reset:scene}.scene-item{display:grid;grid-template-columns:90px minmax(0,1fr);gap:18px;padding:22px 0;border-top:1px solid 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strong{color:var(--gold-light);display:block;margin-bottom:4px}.status-board{display:grid;gap:12px}.status-row{display:grid;grid-template-columns:94px minmax(0,1fr);gap:14px;align-items:start;padding:15px 0;border-bottom:1px solid var(--line)}.status-row:last-child{border-bottom:0}.status-tag{display:inline-flex;align-items:center;justify-content:center;min-height:32px;padding:2px 10px;border:1px solid var(--gold-deep);border-radius:999px;color:var(--title);font-size:12px}.memo-list{display:grid;gap:12px}.memo-item{padding:16px 18px;background:var(--panel-2);border-left:3px solid var(--copper);border-radius:0 8px 8px 0}.method-list{display:grid;gap:18px}.method-step{display:grid;grid-template-columns:64px minmax(0,1fr);gap:16px}.method-step b{color:var(--gold-light);font-size:12px;padding-top:3px}.topic-list{display:grid;gap:12px}.topic-item{padding:18px;border:1px solid var(--line);border-radius:8px;background:var(--panel)}.topic-item h3{margin-bottom:7px}.dark-band{background:var(--bg-deep);border:1px solid var(--line-strong);border-radius:9px;padding:24px;box-shadow:var(--shadow)}.app-band{display:grid;grid-template-columns:minmax(0,1fr) 250px;gap:24px;align-items:center}.app-mini{width:48px;height:48px;margin-bottom:12px}.app-mini img{width:48px;height:48px;object-fit:contain}.policy-sections{display:grid;gap:22px}.policy-sections section{padding-bottom:20px;border-bottom:1px solid var(--line)}.policy-sections section:last-child{border-bottom:0}.policy-sections h2{margin-bottom:9px}.faq-list{display:grid;gap:12px}.faq-item{background:var(--panel);border:1px solid var(--line);border-radius:8px;padding:18px}.faq-item h2{font-size:16px;margin-bottom:7px}.about-banner{margin:14px 0 24px}.plain-list{margin:0;padding:0;list-style:none;display:grid;gap:10px}.plain-list li{padding:11px 0;border-bottom:1px solid var(--line)}.plain-list strong{color:var(--title)}.site-footer{background:var(--bg-deep);border-top:1px solid var(--gold);padding:34px 0 calc(28px + env(safe-area-inset-bottom));font-size:13px;color:var(--text)}.footer-brand{display:flex;align-items:center;gap:14px;padding-bottom:22px;border-bottom:1px solid var(--line)}.footer-brand div{display:flex;flex-direction:column}.footer-brand strong{color:var(--title);font-size:16px}.footer-brand span{color:var(--muted);font-size:12px}.footer-map{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;padding:24px 0}.footer-map h2{font-size:13px;margin-bottom:8px}.footer-map a{display:block;color:#c8b88e;padding:3px 0}.footer-map a:hover,.footer-map a:focus-visible{color:var(--gold-light)}.footer-note{max-width:820px;color:#a99364}.footer-copy{margin:12px 0 0;color:var(--soft)}.screen-overlay{position:fixed;inset:0;background:rgba(0,0,0,.72);z-index:110;opacity:0;visibility:hidden;pointer-events:none;transition:.2s}.screen-overlay.is-open{opacity:1;visibility:visible;pointer-events:auto}.full-menu{position:fixed;left:0;right:0;bottom:0;z-index:120;max-height:72vh;background:#0a0907;border-top:1px solid var(--gold);box-shadow:0 -20px 40px rgba(0,0,0,.48);transform:translateY(102%);visibility:hidden;pointer-events:none;transition:transform .22s ease,visibility .22s;overflow:auto;padding:0 max(16px,calc((100vw - 1120px)/2)) 24px}.full-menu.is-open{transform:translateY(0);visibility:visible;pointer-events:auto}.sheet-head{position:sticky;top:0;background:#0a0907;display:flex;align-items:center;justify-content:space-between;min-height:58px;border-bottom:1px solid var(--line);z-index:2}.sheet-brand{display:flex;align-items:center;gap:12px}.sheet-grid{display:grid;grid-template-columns:1.1fr 1.1fr .9fr 1.4fr;gap:24px;padding-top:20px}.sheet-grid section h2{font-size:13px;color:var(--gold-light);margin-bottom:7px}.sheet-grid a{display:block;padding:8px 0;border-bottom:1px solid rgba(201,162,39,.12)}.sheet-grid a strong,.sheet-grid a span{display:block}.sheet-grid a strong{font-size:14px;color:var(--title)}.sheet-grid a span{font-size:12px;color:#a99059}.search-layer{position:fixed;top:72px;left:0;right:0;z-index:130;visibility:hidden;pointer-events:none;opacity:0;transition:.2s}.search-layer.is-open{visibility:visible;pointer-events:auto;opacity:1}.search-card{width:min(760px,calc(100% - 32px));margin:12px auto;background:#0a0907;border:1px solid var(--gold);box-shadow:var(--shadow);padding:18px;border-radius:8px}.search-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px}.search-head strong{color:var(--title);font-size:16px}.search-card label{display:block;color:var(--muted);font-size:12px;margin-bottom:7px}.search-card input{width:100%;height:44px;border-radius:7px;border:1px solid var(--line-strong);background:#12100d;color:var(--cream);padding:0 12px}.search-presets{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}.search-presets a{display:inline-flex;min-height:38px;align-items:center;padding:0 12px;border:1px solid var(--line);border-radius:999px;color:var(--title)}.mobile-bottom{display:none}.home-intro{padding:30px 0 26px;border-bottom:1px solid var(--line);margin-bottom:30px}.home-intro .lede{max-width:800px}.home-faq{display:grid;grid-template-columns:1fr 1fr;gap:12px}.home-faq article{padding:16px;border:1px solid var(--line);border-radius:8px;background:var(--panel)}.home-faq h3{margin-bottom:5px}.split-text{display:grid;grid-template-columns:1fr 1fr;gap:18px}.split-text article{padding:18px;border:1px solid var(--line);border-radius:8px;background:var(--panel)}
@media (max-width:900px){.brand-en{display:none}.double-nav,.side-museum{display:none}.site-shell{display:block;width:min(100% - 32px,var(--content));padding-top:92px}.page-main{padding-bottom:78px}.footer-inner{width:min(100% - 32px,var(--content))}.footer-map{grid-template-columns:1fr 1fr}.sheet-grid{grid-template-columns:1fr 1fr}.app-band{grid-template-columns:minmax(0,1fr) 220px}.museum-header{box-shadow:none}.search-layer{top:0;bottom:0;background:#070604;padding-top:env(safe-area-inset-top)}.search-card{width:100%;height:100%;margin:0;border:0;border-radius:0;box-shadow:none;padding:18px 16px}.mobile-bottom{position:fixed;z-index:100;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:#090806;border-top:1px solid var(--line)}.mobile-bottom a{display:flex;align-items:center;justify-content:center;min-height:48px;color:var(--text);font-size:12px}.mobile-bottom a.is-active{background:var(--gold);color:#1A1408;font-weight:700}.full-menu{z-index:140}.screen-overlay{z-index:135}.site-footer{padding-bottom:calc(76px + env(safe-area-inset-bottom))}}
@media (max-width:680px){.bar-inner{width:calc(100% - 24px)}.header-inner{gap:8px}.brand-mark{min-width:0}.brand-fallback{font-size:14px}.header-actions{gap:2px}.header-app-link,.menu-button{padding:0 8px}.site-shell{width:calc(100% - 32px)}.scene-item{grid-template-columns:1fr;gap:7px}.note-columns,.work-grid,.split-text,.home-faq{grid-template-columns:1fr}.app-band{grid-template-columns:1fr}.app-band .picture-slot{height:280px}.status-row{grid-template-columns:1fr}.method-step{grid-template-columns:1fr;gap:5px}.footer-map{grid-template-columns:1fr 1fr;gap:18px 12px}.sheet-grid{grid-template-columns:1fr}.full-menu{max-height:72vh}.picture-slot{min-width:0}.slot-176{height:176px}.slot-160{height:160px}.slot-200{height:200px}.page-head{padding-top:20px}}

.mt-14{margin-top:14px}.mt-18{margin-top:18px}

.install-guide{display:grid;gap:14px}.install-step{display:grid;grid-template-columns:72px minmax(0,1fr);gap:18px;padding:18px;border:1px solid var(--line);border-radius:8px;background:linear-gradient(90deg,rgba(201,162,39,.07),transparent)}.install-step>b{color:var(--gold-light);font-size:12px}.install-step h2{margin-bottom:8px}.help-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.help-card{display:block;padding:19px;background:var(--panel);border-top:2px solid var(--gold-deep);border-radius:7px}.help-card>b{display:block;color:var(--gold-light);font-size:12px;margin-bottom:4px}.help-card h2{margin-bottom:8px}@media (max-width:680px){.install-step{grid-template-columns:1fr;gap:5px}.help-grid{grid-template-columns:1fr}}