:root{
  --bg:#EEF0F8;--deep-bg:#E0E4F2;--surface:#F7F8FD;--surface-2:#EBEEF8;
  --title:#1A1840;--text:#2C2A48;--muted:#5A5680;--soft:#7A76A0;
  --purple:#5B4BDB;--blue:#3A6BD4;--deep:#1C1A3A;--mist:#8AA4E0;--lilac:#8A6AD4;
  --border:rgba(58,107,212,.18);--strong-border:rgba(91,75,219,.42);--shadow:0 12px 28px rgba(28,26,58,.08);
  --max:1000px;--radius:12px;--top:118px;
}
*{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","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;font-size:15px;line-height:1.7;overflow-x:hidden}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}button{font:inherit}.shell-width,.content-width{width:min(calc(100% - 32px),var(--max));margin-inline:auto}.skip-link{position:fixed;left:16px;top:-60px;z-index:9999;background:var(--deep);color:#F7F8FD;padding:10px 14px;border-radius:8px}.skip-link:focus{top:8px}.site-shell{position:fixed;inset:0 0 auto;z-index:1000;box-shadow:0 1px 0 var(--border)}.address-strip{height:22px;background:var(--deep);color:#F7F8FD;font-size:12px}.address-strip__inner{height:22px;display:flex;align-items:center;justify-content:space-between;gap:16px}.text-search{border:0;background:transparent;color:#F7F8FD;padding:0 8px;height:22px;cursor:pointer}.window-bar{height:54px;background:var(--deep-bg);border-bottom:1px solid var(--border)}.window-bar__inner{height:54px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:12px}.brand-lockup{justify-self:start;min-height:44px;display:flex;align-items:center}.brand-logo{height:24px;width:auto;object-fit:contain}.brand-text{font-size:16px;font-weight:800;color:var(--title)}.app-shortcut{justify-self:center;min-height:44px;display:flex;align-items:center;padding:0 16px;border-radius:11px;color:var(--title);font-weight:700}.drawer-toggle{justify-self:end;min-height:44px;border:1px solid var(--strong-border);background:var(--surface);color:var(--title);border-radius:11px;padding:0 12px;display:inline-flex;align-items:center;gap:7px;cursor:pointer}.tab-strip{height:42px;background:var(--surface);border-bottom:1px solid var(--border)}.tab-strip__inner{height:42px;display:flex;justify-content:center;align-items:center;gap:8px;flex-wrap:wrap;overflow:visible}.tab-pill{font-size:13px;line-height:30px;padding:0 15px;border-radius:999px;color:var(--muted);border:1px solid transparent}.tab-pill:hover,.tab-pill:focus-visible{border-color:var(--strong-border);outline:none}.tab-pill.is-active{background:var(--purple);color:#F7F8FD}.page-main{padding-top:calc(var(--top) + 28px);padding-bottom:64px;min-height:70vh}.eyebrow{font-size:12px;font-weight:800;letter-spacing:.12em;color:var(--blue);text-transform:uppercase;margin:0 0 8px}.page-hero{width:min(calc(100% - 32px),var(--max));margin:0 auto 28px}.page-hero h1,.home-window h1{font-size:24px;line-height:1.3;color:var(--title);margin:0 0 12px}.page-hero p,.home-window p{margin:0;color:var(--muted)}h2{font-size:20px;line-height:1.4;color:var(--title);margin:0 0 12px}h3{font-size:16px;line-height:1.5;color:var(--title);margin:0 0 8px}p{margin:0 0 14px}.section{width:min(calc(100% - 32px),var(--max));margin:0 auto 28px}.section-pad{padding:24px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow)}.section-title{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:16px}.section-title p{margin:0;color:var(--soft);max-width:560px}.media-slot{width:100%;min-height:150px;border:1px solid var(--border);background:linear-gradient(145deg,var(--surface),var(--deep-bg));border-radius:12px;display:flex;align-items:center;justify-content:center;overflow:hidden}.media-slot img{width:100%;height:100%;object-fit:contain;object-position:center}.slot-banner{height:168px}.slot-wide{height:176px}.slot-medium{height:190px}.slot-app{height:min(320px,62vw)}.slot-icon{height:72px;width:72px;min-height:72px}.btn-row{display:flex;flex-wrap:wrap;gap:10px;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;border:1px solid var(--strong-border)}.btn-primary{background:linear-gradient(135deg,#8AA4E0 0%,#5B4BDB 55%,#3A6BD4 100%);color:#F7F8FD;border-color:transparent}.btn-secondary{background:var(--surface);color:var(--deep)}.btn:hover{transform:translateY(-1px);box-shadow:var(--shadow)}.btn:focus-visible,a:focus-visible,button:focus-visible{outline:3px solid rgba(58,107,212,.32);outline-offset:2px}.note{padding:14px 16px;background:var(--surface-2);border-left:3px solid var(--purple);border-radius:0 10px 10px 0;color:var(--muted)}.soft-list{display:grid;gap:10px;margin:0;padding:0;list-style:none}.soft-list li{padding:13px 15px;background:var(--surface-2);border:1px solid var(--border);border-radius:10px}.two-col{display:grid;grid-template-columns:1fr 1fr;gap:18px}.three-col{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.home-window{width:min(calc(100% - 32px),var(--max));margin:0 auto 28px;background:var(--surface);border:1px solid var(--strong-border);border-radius:14px;padding:18px;box-shadow:var(--shadow)}.home-window__copy{padding:20px 4px 4px;max-width:760px}.home-longread{display:grid;grid-template-columns:minmax(280px,.8fr) 1.2fr;gap:24px;align-items:center}.stair-stack{display:grid;gap:12px}.stair-card{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:18px;box-shadow:var(--shadow);max-width:760px}.stair-card:nth-child(2){margin-left:24px}.tag-wrap{display:flex;gap:9px;flex-wrap:wrap;margin:14px 0}.tag-wrap span,.tag-wrap a{display:inline-flex;align-items:center;min-height:38px;padding:0 14px;border-radius:999px;background:var(--surface-2);border:1px solid var(--border);color:var(--title);font-weight:700}.compare-box{display:grid;grid-template-columns:1fr 1fr;gap:18px}.compare-pane{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:18px}.path-flow{display:flex;align-items:stretch;gap:10px;flex-wrap:wrap}.path-step{flex:1 1 190px;padding:18px;background:var(--deep);color:#F7F8FD;border-radius:12px}.path-step h3{color:#F7F8FD}.center-cards{display:grid;grid-template-columns:repeat(2,minmax(0,320px));justify-content:center;gap:18px}.center-card{text-align:center;background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:22px;box-shadow:var(--shadow)}.product-card{width:min(100%,680px);margin:0 auto;display:grid;grid-template-columns:minmax(180px,260px) 1fr;gap:24px;align-items:center;background:var(--surface);border:1px solid var(--strong-border);border-radius:14px;padding:22px;box-shadow:var(--shadow)}.product-meta{display:flex;gap:12px;align-items:center;margin-bottom:12px}.product-meta .media-slot{flex:0 0 72px}.feature-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.feature-strip article{background:var(--surface);border:1px solid var(--border);border-radius:11px;padding:15px}.window-demo{background:var(--surface);border:1px solid var(--strong-border);border-radius:14px;overflow:hidden;box-shadow:var(--shadow)}.window-demo__top{height:34px;background:var(--deep);display:flex;gap:7px;align-items:center;padding:0 12px}.window-demo__top i{width:8px;height:8px;border-radius:50%;background:var(--mist)}.window-demo__body{padding:22px}.window-demo__body .media-slot{margin-bottom:18px}.reading-sheet{background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:28px clamp(20px,5vw,56px);box-shadow:var(--shadow);max-width:820px;margin-inline:auto}.reading-sheet .reading-sample{font-size:16px;line-height:1.9;color:var(--text)}.tool-list{display:grid;gap:12px}.tool-item{display:grid;grid-template-columns:120px 1fr;gap:16px;padding:16px;background:var(--surface);border:1px solid var(--border);border-radius:12px}.tool-item b{color:var(--title)}.split-board{display:grid;grid-template-columns:1fr 1fr;border:1px solid var(--strong-border);border-radius:14px;overflow:hidden;box-shadow:var(--shadow)}.split-board article{padding:22px;background:var(--surface)}.split-board article+article{border-left:1px solid var(--border);background:var(--surface-2)}.memo-board{display:grid;gap:12px;counter-reset:memo}.memo-card{position:relative;padding:18px 18px 18px 58px;background:var(--surface);border:1px solid var(--border);border-radius:12px}.memo-card:before{counter-increment:memo;content:counter(memo);position:absolute;left:16px;top:17px;width:28px;height:28px;border-radius:8px;background:var(--purple);color:#fff;display:grid;place-items:center;font-weight:800}.terms{display:grid;gap:14px}.term-block{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:20px}.term-block h2{font-size:18px}.install-rail{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.install-step{position:relative;padding:18px;background:var(--surface);border:1px solid var(--border);border-radius:12px}.install-step strong{display:block;color:var(--purple);margin-bottom:8px}.help-matrix{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.help-matrix article{padding:20px;border-radius:12px;background:var(--surface);border:1px solid var(--border)}.faq-list{display:grid;gap:12px}.faq-item{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:20px}.faq-item h2{font-size:16px}.contact-lanes{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.contact-lane{padding:20px;background:var(--surface);border:1px solid var(--border);border-radius:12px}.brand-statement{background:var(--deep);color:#F7F8FD;border-radius:14px;padding:28px;box-shadow:var(--shadow)}.brand-statement h1,.brand-statement h2,.brand-statement h3{color:#F7F8FD}.brand-statement p{color:#EEF0F8}.brand-columns{display:grid;grid-template-columns:1.1fr .9fr;gap:18px;margin-top:18px}.brand-columns article{padding:20px;border-radius:12px;background:var(--surface);border:1px solid var(--border)}.site-footer{background:var(--deep);color:#EEF0F8;border-top:1px solid var(--mist);padding:36px 0 calc(26px + env(safe-area-inset-bottom))}.footer-grid{display:grid;grid-template-columns:2fr repeat(4,1fr);gap:26px}.footer-brandline{display:flex;gap:12px;align-items:center;margin-bottom:12px}.footer-logo{height:24px;width:auto;object-fit:contain}.footer-brandline strong{display:block;font-size:15px}.footer-brandline span{display:block;font-size:12px;color:#C8D3EF}.footer-brand p{font-size:13px;color:#D9DDF0;max-width:420px}.footer-links h2{font-size:13px;color:#F7F8FD;margin-bottom:10px}.footer-links a{display:block;font-size:13px;color:#D9DDF0;padding:3px 0}.footer-bottom{font-size:13px;color:#C8D3EF;border-top:1px solid rgba(138,164,224,.28);margin-top:24px;padding-top:18px}.page-overlay{position:fixed;inset:0;background:rgba(28,26,58,.42);z-index:1200;opacity:0;visibility:hidden;pointer-events:none;transition:.18s}.page-overlay.is-open{opacity:1;visibility:visible;pointer-events:auto}.tool-drawer{position:fixed;right:16px;bottom:20px;z-index:1300;width:min(360px,calc(100% - 32px));max-height:70vh;background:var(--surface);border:1px solid var(--strong-border);border-radius:14px;box-shadow:0 24px 60px rgba(28,26,58,.28);opacity:0;visibility:hidden;pointer-events:none;transform:translateY(18px) scale(.98);transition:.18s;overflow:hidden}.tool-drawer.is-open{opacity:1;visibility:visible;pointer-events:auto;transform:none}.drawer-head{display:flex;align-items:center;justify-content:space-between;padding:14px 16px;border-bottom:1px solid var(--border);background:var(--deep-bg)}.drawer-brand{display:flex;align-items:center;gap:10px}.drawer-brand img{height:24px;width:auto;object-fit:contain}.icon-button{min-height:44px;padding:0 12px;border:1px solid var(--strong-border);background:var(--surface);color:var(--title);border-radius:10px;cursor:pointer}.drawer-scroll{max-height:calc(70vh - 74px);overflow:auto;padding:12px}.drawer-scroll section+section{margin-top:12px}.drawer-scroll h2{font-size:13px;color:var(--soft);margin:0 0 6px;padding:0 6px}.drawer-scroll a{display:grid;grid-template-columns:110px 1fr;gap:8px;padding:10px;border-radius:9px}.drawer-scroll a:hover{background:var(--surface-2)}.drawer-scroll b{font-size:14px;color:var(--title)}.drawer-scroll span{font-size:12px;color:var(--muted)}.search-layer{position:fixed;left:0;right:0;top:76px;z-index:1300;opacity:0;visibility:hidden;pointer-events:none;transform:translateY(-10px);transition:.18s}.search-layer.is-open{opacity:1;visibility:visible;pointer-events:auto;transform:none}.search-card{width:min(calc(100% - 32px),760px);margin:10px auto 0;background:var(--deep-bg);border:1px solid var(--strong-border);border-radius:14px;padding:18px;box-shadow:0 24px 60px rgba(28,26,58,.2)}.search-head{display:flex;align-items:flex-start;justify-content:space-between;gap:20px}.search-head strong{color:var(--title);font-size:18px}.search-head p{font-size:13px;color:var(--muted);margin:4px 0 0}.search-presets{display:flex;flex-wrap:wrap;gap:9px;margin:16px 0}.search-presets a{min-height:44px;display:inline-flex;align-items:center;padding:0 16px;border-radius:999px;background:var(--surface);border:1px solid var(--border);font-weight:700;color:var(--title)}.search-note{font-size:13px;color:var(--muted);margin:0}.modal-open{overflow:hidden}.mobile-bottom{display:none}.kicker-line{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}.kicker-line span{font-size:12px;padding:5px 9px;background:var(--surface-2);border:1px solid var(--border);border-radius:999px;color:var(--muted)}.aside-callout{padding:18px;border:1px solid var(--strong-border);border-radius:12px;background:var(--deep-bg)}.compact-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.compact-grid article{padding:16px;background:var(--surface);border:1px solid var(--border);border-radius:12px}.plain-links{display:flex;gap:10px;flex-wrap:wrap}.plain-links a{min-height:44px;display:inline-flex;align-items:center;padding:0 14px;background:var(--surface);border:1px solid var(--border);border-radius:10px;color:var(--title);font-weight:700}
@media (max-width:820px){.home-longread,.product-card,.brand-columns{grid-template-columns:1fr}.feature-strip,.install-rail{grid-template-columns:repeat(2,1fr)}.footer-grid{grid-template-columns:repeat(2,1fr)}.footer-brand{grid-column:1/-1}.three-col{grid-template-columns:1fr}.compact-grid{grid-template-columns:1fr 1fr}}
@media (max-width:640px){:root{--top:76px}.tab-strip{display:none}.page-main{padding-top:calc(var(--top) + 24px);padding-bottom:84px}.window-bar__inner{grid-template-columns:minmax(0,1fr) auto auto;gap:6px}.brand-lockup{min-width:0}.brand-text{font-size:15px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.app-shortcut{padding:0 8px;font-size:13px}.drawer-toggle{padding:0 8px}.drawer-toggle span:last-child{display:none}.two-col,.compare-box,.split-board,.help-matrix,.contact-lanes{grid-template-columns:1fr}.split-board article+article{border-left:0;border-top:1px solid var(--border)}.stair-card:nth-child(2){margin-left:0}.center-cards{grid-template-columns:1fr}.feature-strip,.install-rail,.compact-grid{grid-template-columns:1fr}.section-pad{padding:18px}.tool-item{grid-template-columns:1fr;gap:6px}.footer-grid{grid-template-columns:1fr 1fr;gap:18px}.tool-drawer{right:4%;width:92%;bottom:64px;max-height:70vh}.search-layer{inset:0;top:0;background:var(--deep);padding:18px;display:flex;align-items:flex-start;overflow:auto}.search-card{width:100%;margin:52px auto 0;background:var(--deep);color:#F7F8FD;border-color:rgba(138,164,224,.34);box-shadow:none}.search-head strong,.search-head p,.search-note{color:#F7F8FD}.search-card .icon-button{background:#F7F8FD}.search-presets a{background:#F7F8FD;color:var(--deep)}.mobile-bottom{position:fixed;left:0;right:0;bottom:0;z-index:1100;height:calc(48px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);display:grid;grid-template-columns:repeat(4,1fr);background:var(--surface);border-top:1px solid var(--border)}.mobile-bottom a{display:flex;align-items:center;justify-content:center;min-height:48px;font-size:13px;color:var(--muted)}.mobile-bottom a.is-active{background:var(--purple);color:#F7F8FD}.slot-app{height:300px}.page-hero h1,.home-window h1{font-size:24px}.site-footer{padding-bottom:calc(72px + env(safe-area-inset-bottom))}.path-step{flex-basis:100%}.section-title{align-items:flex-start;flex-direction:column}.home-window__copy{padding:18px 0 2px}}

.centered-hero{text-align:center}.spaced-top{margin-top:16px}.eyebrow-light{color:#C8D3EF}