:root{
  --bg:#EEF0F8;--bg-deep:#E0E4F2;--surface:#F7F8FD;--surface-2:#EBEEF8;
  --title:#1A1840;--text:#2C2A48;--muted:#5A5680;--soft:#7A76A0;
  --purple:#5B4BDB;--blue:#3A6BD4;--dark:#1C1A3A;--mist:#8AA4E0;--lilac:#8A6AD4;
  --border:rgba(58,107,212,.18);--border-strong:rgba(91,75,219,.42);--shadow:0 12px 28px rgba(28,26,58,.08);
  --max:1000px;--r:12px;--top-offset: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",sans-serif;font-size:15px;line-height:1.7;overflow-x:hidden}
body.is-locked{overflow:hidden}
a{color:inherit;text-decoration:none}
a,button{font:inherit}
button{border:0;cursor:pointer}
img{max-width:100%;display:block;object-fit:contain;object-position:center}
.skip-link{position:fixed;left:12px;top:-60px;z-index:500;background:var(--surface);color:var(--title);padding:10px 14px;border-radius:8px;box-shadow:var(--shadow)}
.skip-link:focus{top:8px}
.site-fixed-head{position:fixed;left:0;right:0;top:0;z-index:220}
.address-strip{height:22px;background:var(--dark);color:var(--bg)}
.address-inner,.window-head-inner,.section-tabs-inner,.footer-inner,.page-wrap{width:min(var(--max),calc(100% - 32px));margin:0 auto}
.address-inner{height:22px;display:flex;align-items:center;justify-content:space-between;font-size:12px;line-height:1}
.address-brand{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;min-width:0}
.address-search{background:transparent;color:var(--bg);height:22px;min-width:52px;padding:0 4px}
.window-head{height:54px;background:var(--bg-deep);border-bottom:1px solid var(--border-strong)}
.window-head-inner{height:54px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:12px}
.brand-lockup{justify-self:start;display:flex;align-items:center;min-height:44px;min-width:120px}
.brand-logo{height:24px;width:auto;max-width:168px}.brand-text{font-weight:800;font-size:16px;color:var(--title)}
.app-link{justify-self:center;display:inline-flex;align-items:center;min-height:44px;padding:0 16px;border-radius:10px;color:var(--purple);font-weight:800}
.drawer-trigger{justify-self:end;min-height:44px;padding:0 14px;border-radius:10px;background:var(--surface);border:1px solid var(--border-strong);color:var(--title);font-weight:800}
.section-tabs{height:42px;background:var(--surface);border-bottom:1px solid var(--border)}
.section-tabs-inner{height:42px;display:flex;align-items:center;justify-content:center;gap:8px;flex-wrap:wrap;overflow:hidden}
.tab-link{display:inline-flex;align-items:center;justify-content:center;min-height:30px;padding:0 14px;border-radius:999px;font-size:13px;color:var(--muted);border:1px solid transparent}
.tab-link:hover,.tab-link:focus-visible{border-color:var(--border-strong);color:var(--title)}
.tab-link.is-active{background:var(--purple);color:var(--surface)}
.site-main{padding-top:calc(var(--top-offset) + 30px);min-height:70vh}
.page-wrap{padding-bottom:58px}
.page-hero{margin-bottom:28px}
.eyebrow{display:inline-flex;align-items:center;min-height:30px;padding:0 10px;border-radius:999px;background:var(--surface-2);border:1px solid var(--border);color:var(--purple);font-size:13px;font-weight:800;letter-spacing:.03em}
h1{font-size:24px;line-height:1.3;color:var(--title);margin:12px 0 10px}
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}.lead{font-size:16px;color:var(--muted);max-width:780px}.muted{color:var(--muted)}
.button-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:42px;padding:0 18px;border-radius:10px;font-size:14px;font-weight:800;white-space:nowrap;border:1px solid var(--border-strong)}
.btn-primary{background:linear-gradient(135deg,var(--mist) 0%,var(--purple) 55%,var(--blue) 100%);color:var(--surface);border-color:transparent}
.btn-secondary{background:var(--surface);color:var(--dark)}
.btn:hover{transform:translateY(-1px);box-shadow:0 8px 18px rgba(28,26,58,.09)}
a:focus-visible,button:focus-visible{outline:3px solid rgba(91,75,219,.28);outline-offset:2px}
.section{margin:28px 0;padding:24px;border:1px solid var(--border);border-radius:var(--r);background:var(--surface);box-shadow:var(--shadow)}
.section.flat{box-shadow:none}.section.tint{background:var(--surface-2)}
.image-slot{display:flex;align-items:center;justify-content:center;width:100%;background:linear-gradient(180deg,var(--surface-2),var(--surface));border:1px solid var(--border);border-radius:12px;overflow:hidden}
.image-slot img{width:100%;height:100%;object-fit:contain;object-position:center;padding:8px}
.slot-168{height:168px}.slot-176{height:176px}.slot-240{height:240px}.slot-320{height:min(320px,70vw)}
.home-window-card{max-width:760px;margin:0 auto 28px;padding:18px;border-radius:14px;background:var(--surface);border:1px solid var(--border-strong);box-shadow:var(--shadow)}
.home-window-card .window-dots{display:flex;gap:6px;margin-bottom:12px}.home-window-card .window-dots i{width:8px;height:8px;border-radius:50%;display:block;background:var(--mist)}.home-window-card .window-dots i:nth-child(2){background:var(--lilac)}.home-window-card .window-dots i:nth-child(3){background:var(--blue)}
.long-copy{max-width:840px}.long-copy p:last-child{margin-bottom:0}
.stair-stack{display:grid;gap:12px;margin-top:18px}.stair-card{width:calc(100% - 48px);padding:18px;border-radius:12px;background:var(--surface);border:1px solid var(--border);box-shadow:var(--shadow)}.stair-card:nth-child(2){margin-left:24px;background:var(--surface-2)}.stair-card:nth-child(3){margin-left:48px}
.stair-card .image-slot{margin-bottom:14px}
.tag-wrap{display:flex;flex-wrap:wrap;gap:10px;margin:16px 0 18px}.tag-chip{display:inline-flex;align-items:center;min-height:40px;padding:0 16px;border-radius:999px;background:var(--surface-2);border:1px solid var(--border-strong);font-weight:800;color:var(--title)}
.compare-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.compare-card{padding:20px;border-radius:12px;border:1px solid var(--border);background:var(--surface)}.compare-card:nth-child(2){background:var(--bg-deep)}
.path-row{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:18px}.path-step{padding:18px;border-radius:12px;background:var(--surface);border:1px solid var(--border);position:relative}.path-step strong{display:block;color:var(--title);font-size:16px}.path-step span{display:block;color:var(--muted);margin-top:6px}
.center-pair{display:grid;grid-template-columns:repeat(2,minmax(0,360px));justify-content:center;gap:18px}.center-card{padding:22px;border-radius:14px;border:1px solid var(--border);background:var(--surface);text-align:center;box-shadow:var(--shadow)}.center-card .image-slot{margin-bottom:16px}
.product-card{max-width:760px;margin:0 auto;padding:26px;border-radius:14px;background:var(--surface);border:1px solid var(--border-strong);box-shadow:var(--shadow);text-align:center}.product-visual{display:grid;grid-template-columns:96px minmax(0,1fr);gap:16px;align-items:center;max-width:500px;margin:0 auto 20px}.app-icon{width:72px;height:72px;margin:auto;background:var(--surface-2);border:1px solid var(--border);border-radius:18px;display:flex;align-items:center;justify-content:center;overflow:hidden}.app-icon img{width:48px;height:48px}
.note-list,.tool-list,.memo-list,.rights-list{display:grid;gap:12px;margin:18px 0}.note-item,.tool-item,.memo-item,.rights-item{padding:16px 18px;border-radius:12px;background:var(--surface);border:1px solid var(--border)}.note-item strong,.tool-item strong,.memo-item strong,.rights-item strong{display:block;color:var(--title);margin-bottom:6px}
.tool-list{grid-template-columns:repeat(2,minmax(0,1fr))}.tool-item{min-height:150px}.tool-item:nth-child(even){background:var(--surface-2)}
.window-demo{border:1px solid var(--border-strong);border-radius:14px;overflow:hidden;background:var(--surface);box-shadow:var(--shadow)}.window-demo-top{height:34px;background:var(--bg-deep);display:flex;align-items:center;gap:6px;padding:0 12px}.window-demo-top i{display:block;width:8px;height:8px;border-radius:50%;background:var(--purple)}.window-demo-body{padding:22px}.window-demo-body .image-slot{margin-bottom:18px}
.split-demo{display:grid;grid-template-columns:1.15fr .85fr;border:1px solid var(--border-strong);border-radius:14px;overflow:hidden;background:var(--surface)}.split-pane{padding:22px;min-height:240px}.split-pane + .split-pane{border-left:1px solid var(--border);background:var(--surface-2)}
.reading-sheet{max-width:780px;margin:0 auto;background:var(--surface);border-radius:14px;border:1px solid var(--border);padding:34px;box-shadow:var(--shadow)}.reading-options{display:flex;gap:8px;flex-wrap:wrap;margin:16px 0 22px}.reading-options span{padding:8px 12px;border-radius:999px;background:var(--surface-2);border:1px solid var(--border)}
.route-list{display:grid;gap:14px}.route-item{display:grid;grid-template-columns:120px 1fr;gap:18px;padding:18px;border-radius:12px;background:var(--surface);border:1px solid var(--border)}.route-name{font-weight:800;color:var(--purple)}
.terms{display:grid;gap:0;border-radius:14px;overflow:hidden;border:1px solid var(--border);background:var(--surface)}.term-block{padding:22px}.term-block + .term-block{border-top:1px solid var(--border)}.term-block:nth-child(even){background:var(--surface-2)}
.faq-list{display:grid;gap:12px}.faq-item{padding:20px;border-radius:12px;border:1px solid var(--border);background:var(--surface)}.faq-item h2{font-size:17px;margin-bottom:8px}.faq-item p:last-child{margin-bottom:0}
.contact-cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.contact-card{padding:22px;border-radius:12px;background:var(--surface);border:1px solid var(--border)}
.brand-statement{max-width:820px;margin:0 auto;padding:28px;border-radius:14px;background:var(--surface);border:1px solid var(--border-strong);box-shadow:var(--shadow)}.brand-cover{max-width:560px;margin:18px auto}
.mini-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.mini-card{padding:18px;border:1px solid var(--border);border-radius:12px;background:var(--surface)}
.callout{padding:18px 20px;border-left:4px solid var(--purple);background:var(--surface-2);border-radius:0 12px 12px 0;color:var(--muted)}
.site-footer{background:var(--dark);color:var(--bg);border-top:1px solid rgba(138,164,224,.5);padding:38px 0 72px;font-size:13px}.footer-inner{display:grid;gap:28px}.footer-brand-row{display:flex;align-items:center;gap:12px;margin-bottom:10px}.footer-logo{height:24px;width:auto;max-width:160px}.footer-brand strong{display:block;font-size:16px}.footer-brand span{display:block;color:#cfd7f3}.footer-brand p{max-width:760px;color:#d7dcf0;margin:0}.footer-links{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.footer-group h2{font-size:14px;color:var(--bg);margin-bottom:10px}.footer-group a{display:block;padding:4px 0;color:#d9def1}.footer-group a:hover{text-decoration:underline}.footer-bottom{padding-top:18px;border-top:1px solid rgba(138,164,224,.25);display:flex;gap:16px;flex-wrap:wrap;color:#cfd5e9}
.screen-overlay{position:fixed;inset:0;background:rgba(28,26,58,.34);z-index:300;opacity:0;visibility:hidden;pointer-events:none;transition:.2s}.screen-overlay.is-visible{opacity:1;visibility:visible;pointer-events:auto}
.tool-drawer{position:fixed;right:18px;bottom:18px;z-index:340;width:min(360px,calc(100% - 36px));max-height:70vh;background:var(--surface);border:1px solid var(--border-strong);border-radius:14px;box-shadow:0 18px 50px rgba(28,26,58,.24);transform:translateY(24px) scale(.98);opacity:0;visibility:hidden;pointer-events:none;transition:.2s;overflow:hidden}.tool-drawer.is-open{transform:none;opacity:1;visibility:visible;pointer-events:auto}.drawer-head{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:14px;border-bottom:1px solid var(--border);background:var(--bg-deep)}.drawer-brand{display:flex;align-items:center;gap:10px;min-width:0}.drawer-logo{height:24px;width:auto;max-width:100px}.drawer-brand strong{display:block;color:var(--title)}.drawer-brand span{display:block;color:var(--muted);font-size:12px}.drawer-close{min-height:44px;padding:0 10px;background:var(--surface);border:1px solid var(--border);border-radius:10px;color:var(--title)}.drawer-scroll{overflow:auto;max-height:calc(70vh - 74px);padding:10px}.drawer-group{padding:8px}.drawer-group h2{font-size:14px;margin-bottom:6px;color:var(--purple)}.drawer-group a{display:block;padding:10px 12px;border-radius:10px}.drawer-group a:hover{background:var(--surface-2)}.drawer-group strong{display:block}.drawer-group span{display:block;font-size:12px;color:var(--muted)}
.search-layer{position:fixed;z-index:335;top:82px;left:50%;width:min(760px,calc(100% - 32px));transform:translate(-50%,-10px);opacity:0;visibility:hidden;pointer-events:none;transition:.2s}.search-layer.is-open{transform:translate(-50%,0);opacity:1;visibility:visible;pointer-events:auto}.search-card{background:var(--bg-deep);border:1px solid var(--border-strong);border-radius:14px;box-shadow:var(--shadow);padding:18px}.search-head{display:flex;justify-content:space-between;gap:14px;align-items:center}.search-head strong{display:block;color:var(--title)}.search-head span{display:block;color:var(--muted);font-size:13px}.search-head button{min-height:44px;padding:0 12px;border-radius:10px;background:var(--surface);color:var(--title);border:1px solid var(--border)}.search-presets{display:flex;flex-wrap:wrap;gap:10px;margin:16px 0}.search-presets a{display:inline-flex;align-items:center;justify-content:center;min-height:42px;padding:0 16px;border-radius:999px;background:var(--surface);border:1px solid var(--border);font-weight:800;color:var(--title)}.search-card p{margin:0;color:var(--muted)}
.mobile-bottom{display:none}
@media (max-width:760px){
  :root{--top-offset:76px}
  .address-inner,.window-head-inner,.footer-inner,.page-wrap{width:calc(100% - 32px)}
  .section-tabs{display:none}.site-main{padding-top:calc(var(--top-offset) + 24px);padding-bottom:52px}
  .window-head-inner{grid-template-columns:minmax(0,1fr) auto auto;gap:6px}.brand-lockup{min-width:0}.brand-logo{max-width:118px}.brand-text{font-size:15px;white-space:nowrap}.app-link,.drawer-trigger{padding:0 9px;font-size:13px;min-width:58px}
  .section{padding:18px;margin:20px 0}.home-window-card{padding:14px}.stair-card{width:100%}.stair-card:nth-child(2),.stair-card:nth-child(3){margin-left:0}
  .compare-grid,.center-pair,.tool-list,.contact-cards,.mini-grid,.footer-links{grid-template-columns:1fr}
  .path-row{grid-template-columns:1fr}.split-demo{grid-template-columns:1fr}.split-pane + .split-pane{border-left:0;border-top:1px solid var(--border)}
  .route-item{grid-template-columns:1fr;gap:6px}.reading-sheet{padding:22px}.product-visual{grid-template-columns:1fr}.slot-320{height:300px}
  .footer-links{gap:12px}.site-footer{padding-bottom:88px}.footer-bottom{display:grid;gap:8px}
  .tool-drawer{left:4%;right:auto;bottom:62px;width:92%;max-height:70vh}.drawer-scroll{max-height:calc(70vh - 74px)}
  .search-layer{inset:22px 0 0 0;width:100%;height:calc(100vh - 22px);transform:none;background:var(--dark);padding:18px}.search-layer.is-open{transform:none}.search-card{height:100%;border-radius:0;background:var(--dark);color:var(--bg);border:0;box-shadow:none}.search-head strong,.search-head span,.search-card p{color:var(--bg)}.search-head button{background:var(--surface);color:var(--dark)}.search-presets a{background:var(--surface);color:var(--dark)}
  .mobile-bottom{position:fixed;z-index:250;left:0;right:0;bottom:0;display:grid;grid-template-columns:repeat(4,1fr);height:calc(48px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);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:var(--surface)}
  .slot-168{height:168px}.slot-176{height:176px}
}
@media (max-width:390px){.address-brand{max-width:245px}.window-head-inner{gap:2px}.app-link,.drawer-trigger{padding:0 7px;font-size:12px}}
@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}

.center-buttons{justify-content:center}