:root{--bg:#EEF0F8;--bg-deep:#E0E4F2;--surface:#F7F8FD;--surface2:#EBEEF8;--title:#1A1840;--text:#2C2A48;--muted:#5A5680;--aux:#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}
*{box-sizing:border-box}html{scroll-behavior:smooth;overflow-x:hidden}body{margin:0;background:var(--bg);color:var(--text);font:15px/1.7 system-ui,-apple-system,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;overflow-x:hidden}body.locked{overflow:hidden}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}button,input{font:inherit}.skip-link{position:fixed;left:12px;top:-60px;z-index:1000;background:var(--surface);padding:10px 14px;border-radius:8px}.skip-link:focus{top:10px}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.address-bar{position:fixed;inset:0 0 auto 0;height:22px;background:var(--dark);color:#F7F8FD;z-index:90;font-size:12px}.address-inner,.window-inner,.section-tab-inner,.footer-inner{max-width:var(--max);margin:0 auto;padding:0 18px}.address-inner{height:22px;display:flex;align-items:center;justify-content:space-between;gap:12px}.address-brand{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.address-search{height:22px;border:0;background:transparent;color:#F7F8FD;padding:0 4px;cursor:pointer}.window-header{position:fixed;top:22px;left:0;right:0;height:54px;background:var(--bg-deep);border-bottom:1px solid var(--border-strong);z-index:89}.window-inner{height:54px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:14px}.brand-home{justify-self:start;display:flex;align-items:center;min-width:44px;min-height:44px;font-size:16px;font-weight:800;color:var(--title)}.brand-logo{height:24px;width:auto;object-fit:contain;object-position:center}.app-link{justify-self:center;display:flex;align-items:center;min-height:44px;padding:0 16px;color:var(--purple);font-weight:800}.drawer-trigger{justify-self:end;min-height:44px;padding:0 15px;border:1px solid var(--border-strong);border-radius:11px;background:var(--surface);color:var(--dark);cursor:pointer;font-weight:800}.section-tabs{position:fixed;top:76px;left:0;right:0;height:42px;background:var(--surface);border-bottom:1px solid var(--border);z-index:88}.section-tab-inner{height:42px;display:flex;align-items:center;justify-content:center;gap:7px;flex-wrap:wrap}.section-tabs a{font-size:13px;line-height:30px;min-height:30px;padding:0 14px;border:1px solid var(--border);border-radius:999px;color:var(--muted);background:#fff}.section-tabs a.active{background:var(--purple);color:#fff;border-color:var(--purple)}
.site-main{max-width:var(--max);margin:0 auto;padding:146px 18px 64px}.page-hero{padding:26px 0 12px}.eyebrow{display:inline-block;margin-bottom:8px;color:var(--purple);font-weight:800;letter-spacing:.04em}.page-hero h1,.home-hero h1{font-size:24px;line-height:1.3;margin:0 0 12px;color:var(--title)}h2{font-size:20px;line-height:1.35;color:var(--title);margin:0 0 12px}h3{font-size:16px;line-height:1.4;color:var(--title);margin:0 0 8px}p{margin:0 0 14px}.lead{font-size:16px;color:var(--muted);max-width:760px}.section-block{margin:34px 0}.soft-section{background:var(--surface2);border:1px solid var(--border);border-radius:14px;padding:22px}.deep-section{background:var(--dark);color:#F7F8FD;border-radius:14px;padding:24px}.deep-section h2,.deep-section h3{color:#F7F8FD}.btn-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:11px;font-size:14px;font-weight:800;border:1px solid transparent;white-space:nowrap}.btn-primary{background:linear-gradient(135deg,#8AA4E0 0%,#5B4BDB 55%,#3A6BD4 100%);color:#F7F8FD}.btn-secondary{background:var(--surface);border-color:var(--border-strong);color:var(--dark)}a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid rgba(91,75,219,.35);outline-offset:2px}.btn:hover,.section-tabs a:hover,.drawer-trigger:hover{transform:translateY(-1px)}
.image-slot{background:var(--surface);border:1px solid var(--border);border-radius:14px;display:flex;align-items:center;justify-content:center;overflow:hidden;padding:10px}.image-slot img{width:100%;height:100%;object-fit:contain;object-position:center}.slot-168{height:168px}.slot-176{height:176px}.slot-220{height:220px}.slot-260{height:260px}.slot-320{height:320px}.home-hero{padding:22px 0 8px}.home-window{max-width:760px;margin:0 auto;background:var(--surface);border:1px solid var(--border-strong);border-radius:14px;box-shadow:var(--shadow);overflow:hidden}.home-window .window-dots{height:28px;background:var(--bg-deep);border-bottom:1px solid var(--border);display:flex;align-items:center;gap:6px;padding:0 12px}.home-window .window-dots span{width:8px;height:8px;border-radius:50%;background:var(--mist)}.home-window .window-copy{padding:22px}.long-copy{max-width:820px}.stair-stack{display:grid;gap:12px;max-width:840px}.stair-card{background:var(--surface);border:1px solid var(--border);border-radius:13px;padding:18px;box-shadow:var(--shadow)}.stair-card.offset{margin-left:24px}.tag-wrap{display:flex;flex-wrap:wrap;gap:10px;margin:14px 0}.tag-wrap span,.tag-wrap a{display:inline-flex;align-items:center;min-height:40px;padding:0 14px;border-radius:999px;background:var(--bg-deep);border:1px solid var(--border);color:var(--dark);font-weight:700}.compare-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.compare-pane{background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:18px}.path-row{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin:16px 0}.path-row span{background:var(--dark);color:#F7F8FD;border-radius:999px;padding:8px 14px;font-weight:800}.path-row i{font-style:normal;color:var(--aux)}.center-cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;max-width:760px;margin:0 auto}.center-card{background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:20px;text-align:center}.product-card{max-width:720px;margin:0 auto;background:var(--surface);border:1px solid var(--border-strong);border-radius:14px;padding:22px;box-shadow:var(--shadow);text-align:center}.product-icon{width:48px;height:48px;margin:0 auto 10px;object-fit:contain}.product-media{max-width:360px;margin:14px auto}.feature-list,.tool-list,.memo-list{display:grid;gap:12px}.feature-item,.tool-item,.memo-item{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:16px}.tool-item{display:grid;grid-template-columns:120px 1fr;gap:14px}.notice{padding:14px 16px;border-left:4px solid var(--purple);background:var(--surface2);border-radius:0 10px 10px 0}.terms{display:grid;gap:16px}.term{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:18px}.term h2{margin-bottom:8px}.faq-list{display:grid;gap:14px}.faq-item{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:18px}.faq-item h2{font-size:16px}.contact-panels{display:grid;grid-template-columns:1fr 1fr;gap:16px}.contact-panels section{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:18px}.brand-statement{background:linear-gradient(145deg,var(--bg-deep),var(--surface));border:1px solid var(--border-strong);border-radius:14px;padding:24px}.quote-note{font-weight:800;color:var(--purple);font-size:17px}
.site-footer{background:var(--dark);color:#EEF0F8;border-top:1px solid var(--mist);padding:34px 0 24px}.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:22px}.footer-brand strong{display:block;font-size:16px}.footer-brand span{display:block;font-size:12px;color:#cfd5ee}.footer-logo{height:24px;width:auto;object-fit:contain}.footer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.footer-grid h2{font-size:13px;color:#EEF0F8;margin-bottom:8px}.footer-grid a{display:block;font-size:13px;color:#d8dbee;padding:4px 0}.footer-note,.copyright{font-size:13px;color:#c7cbe3}.footer-note{margin-top:22px;padding-top:16px;border-top:1px solid rgba(138,164,224,.22)}
.screen-mask{position:fixed;inset:0;background:rgba(28,26,58,.48);opacity:0;visibility:hidden;pointer-events:none;transition:.2s;z-index:110}.screen-mask.visible{opacity:1;visibility:visible;pointer-events:auto}.tool-drawer{position:fixed;right:18px;bottom:18px;width:360px;max-height:70vh;background:var(--surface);border:1px solid var(--border-strong);border-radius:14px;box-shadow:0 24px 60px rgba(28,26,58,.22);z-index:120;opacity:0;visibility:hidden;pointer-events:none;transform:translateY(16px) scale(.98);transition:.2s;overflow:hidden}.tool-drawer.open{opacity:1;visibility:visible;pointer-events:auto;transform:none}.drawer-head{display:flex;align-items:center;justify-content:space-between;padding:14px;border-bottom:1px solid var(--border);background:var(--bg-deep)}.drawer-brand{display:flex;align-items:center;gap:9px}.drawer-brand img{height:24px;width:auto;object-fit:contain}.close-button{min-height:44px;padding:0 14px;border:1px solid var(--border-strong);border-radius:10px;background:var(--surface);color:var(--dark);cursor:pointer}.drawer-scroll{overflow:auto;max-height:calc(70vh - 74px);padding:12px}.drawer-scroll section{margin-bottom:14px}.drawer-scroll h2{font-size:13px;color:var(--purple);margin:0 0 6px}.drawer-scroll a{display:grid;grid-template-columns:92px 1fr;gap:8px;padding:9px 8px;border-radius:9px}.drawer-scroll a:hover{background:var(--surface2)}.drawer-scroll a b{font-size:14px}.drawer-scroll a span{font-size:12px;color:var(--muted)}
.search-panel{position:fixed;left:0;right:0;top:76px;z-index:121;opacity:0;visibility:hidden;pointer-events:none;transition:.2s;padding:14px 18px}.search-panel.open{opacity:1;visibility:visible;pointer-events:auto}.search-card{max-width:760px;margin:0 auto;background:var(--bg-deep);border:1px solid var(--border-strong);border-radius:14px;padding:18px;box-shadow:var(--shadow)}.search-top{display:flex;justify-content:space-between;gap:12px;align-items:center}.search-top h2{margin:0}.search-input-row{display:grid;grid-template-columns:1fr auto;gap:8px}.search-input-row input{min-height:44px;border:1px solid var(--border-strong);border-radius:10px;background:var(--surface);color:var(--dark);padding:0 12px}.search-input-row button{min-height:44px;border:0;border-radius:10px;background:var(--purple);color:#fff;padding:0 18px;cursor:pointer}.search-presets{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}.search-presets a{padding:7px 12px;border-radius:999px;background:var(--surface);border:1px solid var(--border);font-weight:700}.search-feedback{font-size:13px;color:var(--muted);margin:10px 0 0}.mobile-bottom{display:none}
@media (max-width:700px){.address-inner,.window-inner,.footer-inner{padding-left:16px;padding-right:16px}.address-brand{max-width:72vw}.window-inner{grid-template-columns:minmax(0,1fr) auto auto;gap:6px}.brand-home{min-width:0}.brand-home span{font-size:15px;white-space:nowrap}.app-link{padding:0 8px;font-size:13px}.drawer-trigger{padding:0 10px;font-size:13px}.section-tabs{display:none}.site-main{padding:102px 16px 92px}.compare-grid,.center-cards,.contact-panels{grid-template-columns:1fr}.stair-card.offset{margin-left:0}.tool-item{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr 1fr}.tool-drawer{right:4%;bottom:64px;width:92%;max-height:70vh}.drawer-scroll{max-height:calc(70vh - 74px)}.drawer-scroll a{grid-template-columns:84px 1fr}.search-panel{top:0;bottom:0;padding:0;background:var(--dark)}.search-card{height:100%;max-width:none;border:0;border-radius:0;background:var(--dark);color:#F7F8FD;padding:88px 16px 20px;box-shadow:none}.search-card h2,.search-card p{color:#F7F8FD}.search-card .close-button{background:transparent;color:#F7F8FD;border-color:rgba(247,248,253,.35)}.search-presets a{background:rgba(247,248,253,.08);color:#F7F8FD;border-color:rgba(247,248,253,.16)}.search-feedback{color:#d8dbee}.mobile-bottom{position:fixed;left:0;right:0;bottom:0;z-index:100;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-strong)}.mobile-bottom a{display:flex;align-items:center;justify-content:center;min-height:48px;font-size:13px;color:var(--muted)}.mobile-bottom a.active{background:var(--purple);color:#fff}.footer-note{padding-bottom:10px}.slot-320{height:300px}}
@media (max-width:420px){.address-brand{max-width:68vw}.brand-logo{max-width:118px}.footer-grid{grid-template-columns:1fr}.home-window .window-copy,.product-card,.brand-statement{padding:18px}.path-row{align-items:flex-start}}