:root{--bg:#EEF0F8;--deep:#E0E4F2;--card:#F7F8FD;--sub:#EBEEF8;--title:#1A1840;--text:#2C2A48;--muted:#5A5680;--soft:#7A76A0;--purple:#5B4BDB;--blue:#3A6BD4;--dark:#1C1A3A;--mist:#8AA4E0;--lilac:#8A6AD4;--line:rgba(58,107,212,.18);--strong-line:rgba(91,75,219,.42);--shadow:0 12px 28px rgba(28,26,58,.08)}
*{box-sizing:border-box}html{scroll-behavior:smooth;background:var(--bg)}body{margin:0;background:var(--bg);color:var(--text);font:15px/1.7 system-ui,-apple-system,"Segoe UI","Microsoft YaHei",sans-serif;overflow-x:hidden}a{color:inherit;text-decoration:none}button,input{font:inherit}button{cursor:pointer}.no-scroll{overflow:hidden}.skip-link{position:fixed;left:12px;top:-80px;z-index:200;background:var(--card);color:var(--dark);padding:8px 12px;border-radius:8px}.skip-link:focus{top:8px}.address-bar{position:fixed;z-index:90;top:0;left:0;right:0;height:22px;background:var(--dark);color:#F7F8FD;font-size:12px}.top-shell{width:min(1000px,calc(100% - 32px));height:100%;margin:0 auto;display:flex;align-items:center;justify-content:space-between;gap:14px}.brand-text{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.plain-action{border:0;background:transparent;color:#F7F8FD;min-height:22px;padding:0 4px}.window-head{position:fixed;z-index:88;top:22px;left:0;right:0;height:54px;background:#EBEEF8;border-bottom:1px solid var(--strong-line)}.window-head-inner{height:54px}.logo-link{display:flex;align-items:center;min-height:44px;font-weight:750;color:var(--title);font-size:16px}.brand-logo{display:block;height:24px;width:auto;max-width:180px;object-fit:contain;object-position:center}.app-link,.drawer-toggle{min-height:44px;padding:0 14px;border-radius:10px;display:inline-flex;align-items:center;justify-content:center}.app-link{margin-left:auto;border:1px solid var(--strong-line);background:var(--card);color:var(--dark);font-size:14px}.drawer-toggle{border:0;background:linear-gradient(135deg,#8AA4E0 0%,#5B4BDB 55%,#3A6BD4 100%);color:#F7F8FD;font-size:14px}.channel-tabs{position:fixed;z-index:86;top:76px;left:0;right:0;min-height:42px;background:#F7F8FD;border-bottom:1px solid var(--line)}.tabs-wrap{width:min(1000px,calc(100% - 32px));margin:0 auto;padding:5px 0;display:flex;align-items:center;justify-content:center;gap:7px;flex-wrap:wrap}.tabs-wrap a{min-height:32px;padding:5px 14px;border-radius:999px;color:var(--dark);font-size:13px;border:1px solid transparent}.tabs-wrap a:hover,.tabs-wrap a:focus-visible{border-color:var(--strong-line)}.tabs-wrap a.active{background:var(--purple);color:#F7F8FD}.site-main{padding-top:136px;min-height:60vh}.page-shell{width:min(1000px,calc(100% - 32px));margin:0 auto}.hero-strip{padding:34px 0 16px}.eyebrow{display:inline-flex;padding:5px 10px;border:1px solid var(--strong-line);border-radius:999px;background:var(--card);color:var(--purple);font-size:12px;font-weight:700}.hero-strip h1,.home-hero h1{margin:12px 0 10px;color:var(--title);font-size:24px;line-height:1.3}.lead{max-width:760px;margin:0;color:var(--muted)}h2{font-size:20px;line-height:1.35;color:var(--title)}h3{font-size:16px;line-height:1.4;color:var(--title)}p{margin:0 0 14px}.section{padding:24px 0}.section + .section{border-top:1px solid var(--line)}.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:16px}.section-head h2{margin:0}.section-head p{margin:0;color:var(--muted);max-width:560px}.media-slot{height:176px;border:1px dashed var(--strong-line);border-radius:12px;background:#EBEEF8;display:flex;align-items:center;justify-content:center;overflow:hidden}.media-slot img{display:block;width:100%;height:100%;object-fit:contain;object-position:center}.media-slot.banner{height:168px}.media-slot.app-visual{height:300px;max-width:380px;margin:0 auto}.media-slot.brand-visual{height:210px}.home-hero{padding:34px 0 28px}.home-hero-frame{max-width:820px;margin:0 auto}.home-hero-copy{padding:18px 2px 0}.button-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:16px}.btn{min-height:42px;padding:9px 16px;border-radius:10px;display:inline-flex;align-items:center;justify-content:center;font-size:14px;font-weight:700;white-space:nowrap}.btn-primary{background:linear-gradient(135deg,#8AA4E0 0%,#5B4BDB 55%,#3A6BD4 100%);color:#F7F8FD}.btn-secondary{background:var(--card);color:var(--dark);border:1px solid var(--strong-line)}.btn:hover{transform:translateY(-1px)}.btn:focus-visible,a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid rgba(91,75,219,.28);outline-offset:2px}.long-copy{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:20px;box-shadow:var(--shadow)}.long-copy p:last-child{margin-bottom:0}.stacked-steps{display:grid;gap:12px;max-width:780px}.step-card{background:var(--card);border:1px solid var(--line);border-radius:13px;padding:18px;box-shadow:var(--shadow)}.step-card.offset{margin-left:24px}.step-card h3{margin:0 0 8px}.wrap-tags{display:flex;flex-wrap:wrap;gap:9px;margin:14px 0}.tag{padding:8px 12px;border-radius:999px;background:var(--deep);color:var(--dark);border:1px solid var(--line);font-weight:700}.split-compare{display:grid;grid-template-columns:1fr 1fr;gap:16px}.compare-card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:18px}.compare-card .media-slot{height:154px;margin-bottom:14px}.path-flow{display:flex;align-items:stretch;gap:10px;flex-wrap:wrap}.path-node{flex:1 1 180px;background:var(--card);border:1px solid var(--line);border-radius:12px;padding:16px;position:relative}.path-node:not(:last-child):after{content:"→";position:absolute;right:-9px;top:50%;transform:translateY(-50%);color:var(--purple);font-weight:800}.center-cards{display:grid;grid-template-columns:repeat(2,minmax(0,320px));justify-content:center;gap:16px}.center-card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:20px;text-align:center;box-shadow:var(--shadow)}.product-card{max-width:760px;margin:0 auto;background:var(--card);border:1px solid var(--strong-line);border-radius:14px;padding:22px;box-shadow:var(--shadow);text-align:center}.product-icon{width:48px;height:48px;object-fit:contain;margin:0 auto 10px}.product-card .media-slot{margin-bottom:16px}.feature-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.feature-item{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:16px}.faq-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.faq-mini{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:16px}.faq-mini h3{margin:0 0 8px}.browser-frame{border:1px solid var(--strong-line);background:var(--card);border-radius:14px;overflow:hidden;box-shadow:var(--shadow)}.browser-frame .frame-bar{height:34px;background:var(--deep);border-bottom:1px solid var(--line);display:flex;align-items:center;gap:6px;padding:0 12px}.browser-frame .dot{width:8px;height:8px;border-radius:50%;background:var(--mist)}.browser-frame .frame-body{padding:18px}.browser-frame .frame-address{height:34px;background:#F7F8FD;border:1px solid var(--line);border-radius:8px;display:flex;align-items:center;padding:0 12px;color:var(--muted);font-size:13px;margin-bottom:16px}.stair-layout{display:grid;gap:14px;max-width:820px}.stair-layout article{background:var(--card);border:1px solid var(--line);border-radius:13px;padding:18px;box-shadow:var(--shadow)}.stair-layout article:nth-child(2){margin-left:30px}.stair-layout article:nth-child(3){margin-left:60px}.tag-layout{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:20px}.reading-layout{display:grid;grid-template-columns:minmax(0,1fr) 260px;gap:18px}.reading-paper{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:24px;box-shadow:var(--shadow)}.reading-controls{background:var(--deep);border:1px solid var(--line);border-radius:14px;padding:18px}.tool-list{display:grid;gap:10px}.tool-row{display:grid;grid-template-columns:120px 1fr;gap:16px;align-items:start;background:var(--card);border:1px solid var(--line);border-radius:12px;padding:16px}.tool-row strong{color:var(--purple)}.memo-list{display:grid;gap:10px}.memo-item{background:var(--card);border-left:4px solid var(--purple);border-radius:10px;padding:16px 18px;box-shadow:var(--shadow)}.terms{display:grid;gap:14px}.terms section{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:18px}.terms section h2{margin-top:0}.contact-lanes{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.contact-lanes article{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:18px}.notice{padding:14px 16px;border-radius:12px;background:var(--deep);color:var(--dark);border:1px solid var(--strong-line)}.site-footer{margin-top:38px;background:var(--dark);color:#EEF0F8;border-top:1px solid var(--mist);padding:32px 0 82px}.footer-shell{width:min(1000px,calc(100% - 32px));margin:0 auto}.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:22px}.footer-brand div{display:flex;flex-direction:column}.footer-brand span{font-size:12px;color:#C7CDEA}.footer-groups{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}.footer-groups h2{font-size:14px;color:#F7F8FD;margin:0 0 8px}.footer-groups a{display:block;font-size:13px;color:#D9DDF0;padding:4px 0}.footer-note{margin:22px 0 8px;padding-top:18px;border-top:1px solid rgba(138,164,224,.24);font-size:13px;color:#D9DDF0}.copyright{font-size:13px;color:#C7CDEA}.screen-mask{position:fixed;z-index:110;inset:0;background:rgba(28,26,58,.46);opacity:0;pointer-events:none;transition:opacity .18s}.screen-mask.show{opacity:1;pointer-events:auto}.tool-drawer{position:fixed;z-index:120;right:18px;bottom:18px;width:min(360px,calc(100% - 36px));max-height:70vh;background:var(--card);border:1px solid var(--strong-line);border-radius:14px;box-shadow:0 24px 60px rgba(28,26,58,.26);visibility:hidden;opacity:0;pointer-events:none;transform:translateY(12px) scale(.98);transition:.18s;overflow:hidden}.tool-drawer.open{visibility:visible;opacity:1;pointer-events:auto;transform:none}.drawer-head{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:13px 14px;background:var(--deep);border-bottom:1px solid var(--line)}.drawer-brand{display:flex;align-items:center;gap:10px}.drawer-close,.search-close{min-height:40px;border:1px solid var(--strong-line);background:var(--card);color:var(--dark);border-radius:9px;padding:0 12px}.drawer-scroll{max-height:calc(70vh - 68px);overflow:auto;padding:14px}.drawer-scroll section+section{margin-top:16px}.drawer-scroll h2{font-size:13px;color:var(--soft);margin:0 0 6px}.drawer-scroll a{display:block;padding:9px 10px;border-radius:9px}.drawer-scroll a:hover{background:var(--sub)}.drawer-scroll a strong,.drawer-scroll a span{display:block}.drawer-scroll a span{font-size:12px;color:var(--muted);margin-top:2px}.search-panel{position:fixed;z-index:118;top:76px;left:0;right:0;visibility:hidden;opacity:0;pointer-events:none;transform:translateY(-10px);transition:.18s}.search-panel.open{visibility:visible;opacity:1;pointer-events:auto;transform:none}.search-card{width:min(760px,calc(100% - 32px));margin:0 auto;background:#EBEEF8;border:1px solid var(--strong-line);border-radius:0 0 14px 14px;padding:18px;box-shadow:var(--shadow)}.search-head{display:flex;align-items:center;justify-content:space-between}.search-head h2{margin:0}.search-card label{display:block;font-size:13px;color:var(--muted);margin:12px 0 5px}.search-card input{width:100%;height:44px;border:1px solid var(--strong-line);border-radius:10px;background:var(--card);color:var(--dark);padding:0 12px}.search-presets{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}.search-presets a{padding:8px 11px;background:var(--card);border:1px solid var(--line);border-radius:999px}.mobile-bottom{display:none}
@media (max-width:760px){.address-bar .top-shell{width:calc(100% - 24px)}.window-head-inner{width:calc(100% - 24px);gap:8px}.logo-link{min-width:0;max-width:42%}.logo-link span{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.app-link,.drawer-toggle{padding:0 10px}.channel-tabs{display:none}.site-main{padding-top:92px;padding-bottom:58px}.page-shell{width:calc(100% - 32px)}.home-hero{padding-top:24px}.step-card.offset,.stair-layout article:nth-child(2),.stair-layout article:nth-child(3){margin-left:0}.split-compare,.feature-list,.faq-grid,.contact-lanes,.footer-groups,.reading-layout{grid-template-columns:1fr}.center-cards{grid-template-columns:1fr}.tool-row{grid-template-columns:1fr;gap:5px}.path-node:not(:last-child):after{display:none}.site-footer{padding-bottom:82px}.tool-drawer{right:4%;bottom:64px;width:92%;max-height:70vh}.search-panel{inset:0;top:0;background:var(--dark);display:flex;align-items:flex-start;padding-top:calc(18px + env(safe-area-inset-top))}.search-card{width:calc(100% - 24px);margin:0 auto;background:var(--dark);color:#F7F8FD;border-radius:14px;border-color:rgba(138,164,224,.4)}.search-card h2,.search-card label,.search-card p{color:#F7F8FD}.search-presets a{background:#F7F8FD;color:var(--dark)}.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);background:#F7F8FD;border-top:1px solid var(--line);display:grid;grid-template-columns:repeat(4,1fr)}.mobile-bottom a{min-height:48px;display:flex;align-items:center;justify-content:center;font-size:13px}.mobile-bottom a.active{background:var(--purple);color:#F7F8FD}.media-slot.app-visual{height:280px}.footer-groups{gap:12px}.footer-groups section{padding-bottom:8px;border-bottom:1px solid rgba(138,164,224,.16)}}
@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}

.mt-14{margin-top:14px}.mt-16{margin-top:16px}.button-center{justify-content:center}.centered-hero{text-align:center}.lead-center{margin-left:auto;margin-right:auto}