:root{
    --bg:#EEF0F8;--deep-bg:#E0E4F2;--card:#F7F8FD;--soft:#EBEEF8;--title:#1A1840;--text:#2C2A48;
    --muted:#5A5680;--assist:#7A76A0;--purple:#5B4BDB;--blue:#3A6BD4;--dark:#1C1A3A;--mist:#8AA4E0;
    --lilac:#8A6AD4;--warm:#F7F8FD;--border:rgba(58,107,212,.18);--strong-border:rgba(91,75,219,.42);
    --shadow:0 12px 28px rgba(28,26,58,.08);--top-h:118px;
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","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}.shell{width:min(1000px,calc(100% - 32px));margin:0 auto}.top-stack{position:fixed;inset:0 0 auto 0;z-index:80}.address-bar{height:22px;background:var(--dark);color:var(--warm);font-size:12px}.address-inner{height:22px;display:flex;align-items:center;justify-content:space-between;gap:16px}.address-brand{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.address-search{height:22px;border:0;background:transparent;color:var(--warm);padding:0 4px;text-decoration:underline;text-underline-offset:2px}.window-head{height:54px;background:#E8E5F8;border-bottom:1px solid var(--border)}.window-head-inner{height:54px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:16px}.brand-link{justify-self:start;min-height:44px;display:flex;align-items:center;max-width:230px}.head-logo,.drawer-logo,.footer-logo{height:24px;width:auto}.brand-text{font-size:16px;font-weight:800;color:var(--title)}.app-link{justify-self:center;min-height:44px;display:flex;align-items:center;padding:0 18px;border:1px solid var(--strong-border);border-radius:999px;background:var(--card);color:var(--title);font-size:14px;font-weight:700}.drawer-button{justify-self:end;height:44px;min-width:72px;border:0;border-radius:10px;background:linear-gradient(135deg,#8AA4E0 0%,#5B4BDB 55%,#3A6BD4 100%);color:var(--warm);font-size:14px;font-weight:800}.tab-strip{height:42px;background:var(--warm);border-bottom:1px solid var(--border)}.tab-wrap{height:42px;display:flex;align-items:center;justify-content:center;gap:8px;flex-wrap:wrap;overflow:hidden}.tab-pill{font-size:13px;line-height:30px;min-width:64px;text-align:center;padding:0 14px;border:1px solid var(--border);border-radius:999px;color:var(--title);background:var(--soft)}.tab-pill.is-active{background:var(--purple);border-color:var(--purple);color:var(--warm)}
.site-main{padding-top:calc(var(--top-h) + 26px);padding-bottom:34px;min-height:65vh}.page-section{margin:0 auto 24px}.eyebrow{display:inline-flex;align-items:center;min-height:30px;padding:0 12px;border-radius:999px;background:var(--deep-bg);color:var(--title);font-size:13px;font-weight:800;border:1px solid var(--border)}h1,h2,h3{margin:0;color:var(--title);line-height:1.3}h1{font-size:24px}h2{font-size:20px}h3{font-size:16px}p{margin:0 0 14px}.lead{font-size:15px;color:var(--muted);margin-top:12px}.content-card{background:var(--card);border:1px solid var(--border);border-radius:14px;box-shadow:var(--shadow)}.soft-card{background:var(--soft);border:1px solid var(--border);border-radius:12px}.deep-card{background:var(--dark);color:var(--warm);border-radius:14px}.deep-card h2,.deep-card h3,.deep-card p{color:var(--warm)}.section-head{display:flex;align-items:end;justify-content:space-between;gap:18px;margin-bottom:14px}.section-head p{max-width:620px;color:var(--muted);margin:0}.btn-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}.btn{min-height:42px;display:inline-flex;align-items:center;justify-content:center;padding:0 18px;border-radius:10px;font-size:14px;font-weight:800}.btn-primary{background:linear-gradient(135deg,#8AA4E0 0%,#5B4BDB 55%,#3A6BD4 100%);color:var(--warm);border:1px solid transparent}.btn-secondary{background:var(--card);color:var(--title);border:1px solid var(--strong-border)}.btn:hover,.tab-pill:hover,.footer-col a:hover,.drawer-group a:hover,.mobile-bottom a:hover{filter:brightness(.98)}a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid rgba(91,75,219,.28);outline-offset:2px}.media-slot{background:#E8E5F8;border:1px solid var(--border);border-radius:12px;display:flex;align-items:center;justify-content:center;overflow:hidden}.media-slot img{width:100%;height:100%;object-fit:contain}.media-168{height:168px}.media-176{height:176px}.media-220{height:220px}.media-280{height:280px}.media-320{height:320px}.prose{padding:24px}.prose p:last-child{margin-bottom:0}.prose ul,.prose ol{padding-left:20px;margin:10px 0 0}.prose li{margin:8px 0}.note{padding:14px 16px;border-left:3px solid var(--purple);background:#ECEAF8;border-radius:0 10px 10px 0;color:var(--muted)}
.hero-window{display:grid;grid-template-columns:minmax(0,360px) 1fr;gap:24px;align-items:center;padding:18px}.hero-window .hero-copy{padding:6px 6px 6px 0}.hero-window h1{margin-top:10px}.hero-kicker{color:var(--purple);font-weight:800;font-size:13px}.long-story{padding:24px}.long-story .media-slot{margin-bottom:18px}.stair-list{display:grid;gap:12px}.stair-card{padding:20px;background:var(--card);border:1px solid var(--border);border-radius:12px;box-shadow:var(--shadow);max-width:860px}.stair-card:nth-child(2){margin-left:24px}.stair-card .media-slot{margin-bottom:14px}.tag-cloud{display:flex;gap:10px;flex-wrap:wrap;margin:14px 0}.tag-cloud a,.tag-cloud span{display:inline-flex;align-items:center;min-height:36px;padding:0 14px;border-radius:999px;background:#E7E8F8;border:1px solid var(--border);color:var(--title);font-weight:700}.compare-two{display:grid;grid-template-columns:1fr 1fr;gap:16px}.compare-pane{padding:20px}.compare-pane .media-slot{margin-bottom:14px}.path-strip{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.path-step{padding:12px 16px;border-radius:10px;background:var(--soft);border:1px solid var(--border);font-weight:800;color:var(--title)}.path-arrow{color:var(--assist);font-weight:900}.center-pair{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;max-width:760px;margin:0 auto}.center-info{text-align:center;padding:22px}.product-card{max-width:760px;margin:0 auto;padding:22px;display:grid;grid-template-columns:210px 1fr;gap:22px;align-items:center}.product-icon{width:48px;height:48px;margin-bottom:10px}.index-tail{display:grid;gap:16px}.faq-mini{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.faq-mini article{padding:18px}.brand-strip{padding:24px;background:linear-gradient(135deg,#E7E5F8 0%,#EDF1FB 100%);border:1px solid var(--border);border-radius:14px}
.page-intro{padding:22px}.window-demo{padding:16px;border:1px solid var(--border);border-radius:14px;background:var(--card);box-shadow:var(--shadow)}.window-demo-bar{height:34px;border-radius:9px 9px 0 0;background:var(--dark);display:flex;align-items:center;gap:7px;padding:0 12px}.window-demo-dot{width:8px;height:8px;border-radius:50%;background:var(--mist)}.window-demo-body{padding:16px;background:var(--warm);border:1px solid var(--border);border-top:0;border-radius:0 0 9px 9px}.step-stack{display:grid;gap:14px}.step-stack article{padding:20px}.step-stack article:nth-child(2){margin-left:24px}.step-stack article:nth-child(3){margin-left:48px}.reading-sheet{padding:26px;border-radius:14px;background:var(--card);border:1px solid var(--border);box-shadow:var(--shadow)}.reading-tools{display:flex;gap:8px;flex-wrap:wrap;margin:12px 0 18px}.reading-tools span{padding:7px 11px;border:1px solid var(--border);border-radius:8px;background:var(--soft);font-size:13px}.tool-list{display:grid;gap:12px}.tool-row{display:grid;grid-template-columns:140px 1fr;gap:18px;padding:18px}.split-layout{display:grid;grid-template-columns:1fr 1fr;gap:16px}.split-layout .pane{padding:22px}.memo-list{display:grid;gap:12px}.memo-item{padding:18px;border-left:4px solid var(--blue)}.terms{display:grid;gap:14px}.terms article{padding:22px}.center-guide{max-width:760px;margin:0 auto;text-align:center}.center-guide .content-card{padding:24px}.install-flow{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.install-flow article{padding:18px}.help-groups{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.help-groups article{padding:20px}.qa-list{display:grid;gap:12px}.qa-list details{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:0 18px}.qa-list summary{cursor:pointer;min-height:54px;display:flex;align-items:center;font-weight:800;color:var(--title)}.qa-list p{padding:0 0 18px;margin:0;color:var(--text)}.contact-cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.contact-cards article{padding:20px}.brand-manifesto{display:grid;gap:14px}.brand-manifesto article{padding:22px}
.site-footer{background:var(--dark);color:var(--warm);border-top:1px solid rgba(138,164,224,.45);padding:32px 0 74px;font-size:13px}.footer-grid{display:grid;grid-template-columns:2fr repeat(4,1fr);gap:24px}.footer-brand p{color:#DADAF0;max-width:410px;margin-top:14px}.footer-brand-line{display:flex;align-items:center;gap:10px}.footer-brand-line div{display:flex;flex-direction:column}.footer-brand-line strong{font-size:16px}.footer-brand-line span{color:#C7CBEA}.footer-col h2{font-size:13px;color:#EEF0F8;margin-bottom:10px}.footer-col a{display:block;color:#D9DCF2;margin:7px 0}.footer-bottom{border-top:1px solid rgba(138,164,224,.22);margin-top:24px;padding-top:16px;display:flex;gap:16px;flex-wrap:wrap;color:#C7CBEA}
.overlay{position:fixed;inset:0;background:rgba(28,26,58,.46);z-index:90;opacity:0;visibility:hidden;pointer-events:none;transition:.2s}.overlay.is-open{opacity:1;visibility:visible;pointer-events:auto}.tool-drawer{position:fixed;z-index:110;right:18px;bottom:18px;width:360px;max-height:70vh;background:var(--card);border:1px solid var(--strong-border);border-radius:16px;box-shadow:0 24px 60px rgba(28,26,58,.24);transform:translateY(18px);opacity:0;visibility:hidden;pointer-events:none;transition:.2s;overflow:hidden}.tool-drawer.is-open{transform:translateY(0);opacity:1;visibility:visible;pointer-events:auto}.drawer-head{display:flex;align-items:center;justify-content:space-between;padding:14px 14px 10px;border-bottom:1px solid var(--border);background:#E7E5F8}.drawer-brand{display:flex;align-items:center;gap:10px}.icon-close{min-height:40px;border:1px solid var(--strong-border);border-radius:9px;background:var(--card);color:var(--title);padding:0 12px}.drawer-scroll{overflow:auto;max-height:calc(70vh - 66px);padding:12px}.drawer-group{margin-bottom:14px}.drawer-group h2{font-size:13px;margin:0 0 7px;color:var(--muted)}.drawer-group a{display:grid;grid-template-columns:92px 1fr;gap:10px;padding:9px 10px;border-radius:9px}.drawer-group a:hover{background:var(--soft)}.drawer-group span{font-weight:800;color:var(--title)}.drawer-group small{color:var(--muted);font-size:12px}.search-layer{position:fixed;z-index:105;top:76px;left:0;right:0;opacity:0;visibility:hidden;pointer-events:none;transition:.2s}.search-layer.is-open{opacity:1;visibility:visible;pointer-events:auto}.search-card{width:min(720px,calc(100% - 32px));margin:0 auto;background:#E7E5F8;border:1px solid var(--strong-border);border-radius:0 0 16px 16px;box-shadow:var(--shadow);padding:18px}.search-head{display:flex;justify-content:space-between;gap:16px;align-items:flex-start}.search-head p{color:var(--muted);margin:4px 0 0}.search-input-wrap{display:block;margin-top:14px;color:var(--muted);font-size:13px}.search-input-wrap input{width:100%;height:44px;margin-top:6px;border:1px solid var(--strong-border);border-radius:10px;background:var(--card);color:var(--text);padding:0 12px}.search-presets{display:flex;gap:8px;flex-wrap:wrap;margin-top:14px}.search-presets a{min-height:40px;display:flex;align-items:center;padding:0 14px;border-radius:9px;background:var(--card);border:1px solid var(--border);font-weight:800;color:var(--title)}.search-empty{margin:12px 0 0;color:var(--muted)}.layer-open{overflow:hidden}.mobile-bottom{display:none}
@media (max-width:760px){
    :root{--top-h:76px}.shell{width:calc(100% - 32px)}.tab-strip{display:none}.window-head-inner{grid-template-columns:minmax(0,1fr) auto auto;gap:8px}.brand-link{min-width:0;max-width:none}.head-logo{max-width:112px}.brand-text{font-size:15px;white-space:nowrap}.app-link{padding:0 12px;min-width:72px}.drawer-button{min-width:68px}.site-main{padding-top:calc(var(--top-h) + 20px);padding-bottom:76px}.hero-window{grid-template-columns:1fr;padding:14px}.hero-window .hero-copy{padding:4px}.stair-card:nth-child(2),.step-stack article:nth-child(2),.step-stack article:nth-child(3){margin-left:0}.compare-two,.split-layout,.center-pair,.faq-mini,.help-groups,.contact-cards,.install-flow{grid-template-columns:1fr}.product-card{grid-template-columns:1fr;text-align:left}.product-card .media-slot{max-width:240px;margin:0 auto}.tool-row{grid-template-columns:1fr;gap:6px}.footer-grid{grid-template-columns:1fr 1fr}.footer-brand{grid-column:1/-1}.tool-drawer{right:4%;bottom:64px;width:92%;max-height:70vh}.search-layer{inset:0;top:0;background:var(--dark);padding:18px 0;overflow:auto}.search-card{width:calc(100% - 32px);margin:0 auto;background:var(--dark);border:0;border-radius:0;box-shadow:none;color:var(--warm);padding:16px 0}.search-head strong,.search-head p,.search-input-wrap{color:var(--warm)}.search-card .icon-close{background:transparent;color:var(--warm);border-color:rgba(247,248,253,.45)}.search-input-wrap input{background:#F7F8FD}.search-presets a{background:#F7F8FD;color:var(--title)}.search-empty{color:#D9DCF2}.mobile-bottom{display:grid;grid-template-columns:repeat(4,1fr);position:fixed;z-index:85;left:0;right:0;bottom:0;height:calc(48px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);background:var(--card);border-top:1px solid var(--border);box-shadow:0 -8px 24px rgba(28,26,58,.08)}.mobile-bottom a{display:flex;align-items:center;justify-content:center;min-height:48px;font-size:13px;font-weight:800;color:var(--title)}.mobile-bottom a.is-active{background:var(--purple);color:var(--warm)}.site-footer{padding-bottom:84px}.media-320{height:300px}
}
@media (max-width:430px){.footer-grid{grid-template-columns:1fr}.footer-brand{grid-column:auto}.address-brand{max-width:72vw}.app-link{font-size:13px}.drawer-button{font-size:13px}.prose,.long-story,.page-intro,.reading-sheet,.brand-strip{padding:18px}}