@charset "UTF-8";
:root{--background:#F4F7FB;--paper:#fff;--surface:#fff;--surface-soft:#EBF1F9;--navy:#182641;--navy-deep:#101B32;--navy-light:#304564;--blue:#2456C8;--blue-deep:#173E96;--blue-soft:#E7EEFC;--lime:#C6E875;--lime-soft:#EFF7D7;--lime-deep:#4B6530;--ice:#BFE6F0;--ice-soft:#EDF8FB;--ice-deep:#246E83;--violet:#756DAB;--violet-soft:#F0EEFA;--orange:#BA6035;--orange-soft:#FFF0E6;--title:#1C2A41;--body:#46546A;--muted:#65748A;--border:#DEE5EF;--divider:#E9EEF5;--shadow:0 16px 48px rgba(24,38,65,.07)}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:96px}body{margin:0;background:var(--paper);color:var(--body);font:16px/1.75 system-ui,-apple-system,"Microsoft YaHei",sans-serif;overflow-x:hidden}body.theme-dark{--paper:#131d30;--background:#19253a;--surface:#22304a;--surface-soft:#263550;--title:#edf4ff;--body:#c4d0e0;--muted:#acb9cf;--border:#41506a;--divider:#37445b;--blue-soft:#21395f;--lime-soft:#303e2c;--ice-soft:#243f48;--violet-soft:#342f51;--orange-soft:#45332b;--navy:#e9f1fc;--shadow:0 16px 48px rgba(0,0,0,.2)}body.theme-dark .site-header,body.theme-dark .mobile-nav{background:#152137}body.theme-dark .dark-visual,body.theme-dark .privacy-strip,body.theme-dark 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button.active{color:#fff;background:var(--blue);border-color:var(--blue)}.help-content{max-width:1000px;padding-top:20px;padding-bottom:100px}.help-status{color:var(--muted);font-size:13px;margin:12px 0}.help-question{border-bottom:1px solid var(--border);scroll-margin-top:100px}.help-question summary{list-style:none;display:flex;justify-content:space-between;align-items:center;gap:15px;cursor:pointer;padding:21px 5px}.help-question summary small{font-size:11px;color:var(--blue)}.help-question summary h2{font-size:18px;margin:6px 0 0}.expand-icon{font-size:23px;color:var(--blue)}.help-answer{padding:0 28px 24px;font-size:14px}.help-answer strong{color:var(--title)}.help-answer a{color:var(--blue)}.empty-state{padding:25px;border:1px dashed var(--border);border-radius:12px}.back-top{display:inline-block;margin-top:30px;color:var(--blue);font-weight:700}.about-layout{display:grid;grid-template-columns:1.3fr .7fr;gap:80px;padding:20px 0 110px}.about-big h2{font-size:clamp(30px,4vw,50px)}.about-side{background:var(--background);border-radius:20px;padding:32px}.about-side h3{font-size:17px}.about-side p{font-size:14px}.version-area{display:grid;grid-template-columns:1fr 1fr;gap:70px;align-items:center}.version-empty{padding:45px;border:1px dashed var(--border);border-radius:18px;background:var(--surface)}.version-empty span{display:block;font-size:48px;color:var(--blue)}.version-empty strong{color:var(--title)}.about-links>a{display:inline-block;margin:12px 15px 20px 0;border:1px solid var(--border);padding:15px;border-radius:8px;color:var(--blue)}.legal-note{margin-top:20px;font-size:13px;color:var(--muted)}.error-page{padding:120px 0 160px;text-align:center}.error-page h1{font-size:120px;color:var(--blue)}.error-page .action-row{justify-content:center}
@media(max-width:1150px){.primary-nav{gap:13px}.nav-help{display:none}.category-grid{grid-template-columns:repeat(2,1fr)}.platform-grid{grid-template-columns:repeat(2,1fr)}.feature-page-layout{grid-template-columns:170px 1fr;gap:25px}.feature-entry{grid-template-columns:1fr}.feature-entry:nth-child(even) .feature-intro{order:initial}}
@media(max-width:820px){.container{width:calc(100% - 48px)}.primary-nav,.nav-help{display:none}.menu-toggle{display:block;border:0;background:transparent;color:var(--title);font-size:25px;padding:4px 10px}.mobile-backdrop:not([hidden]){display:block;position:fixed;inset:0;background:#030c2088;z-index:60}.mobile-nav:not([hidden]){display:grid;position:fixed;right:0;top:0;bottom:0;width:min(330px,88vw);z-index:61;align-content:start;gap:6px;background:var(--surface);padding:65px 24px 24px;box-shadow:var(--shadow);overflow:auto}.mobile-nav a{padding:14px;border-bottom:1px solid var(--divider)}.menu-close{position:absolute;right:22px;top:15px;border:0;background:transparent;color:var(--title);font-size:27px}.hero,.feature-split,.reading-layout,.organize-layout,.dual-info,.about-layout,.version-area,.install-steps{grid-template-columns:1fr;gap:32px}.hero{padding-top:65px}.hero-art{min-height:350px}.section{padding-block:75px}.security-layout,.feature-page-layout{grid-template-columns:1fr}.security-index,.sticky-index{position:static;display:flex;overflow:auto;gap:10px;white-space:nowrap}.security-index h2,.sticky-index strong{display:none}.security-index a,.sticky-index a{padding:8px 12px;border:1px solid var(--border);border-radius:18px}.workspace-grid{grid-template-columns:1fr}.story-top{display:block}.story-top h2{width:100%}.journey{flex-wrap:wrap}.journey>div{min-width:40%}.journey>b{display:none}.privacy-strip{padding:35px}.privacy-emblem{display:none}.footer-grid{grid-template-columns:1fr 1fr}.footer-grid>div:first-child{grid-column:span 2}.feature-entry{padding-block:35px}}
@media(max-width:500px){.container{width:calc(100% - 32px)}.nav-wrap{height:64px}.brand{font-size:18px}.brand small{font-size:7px}.brand-symbol{width:34px;height:34px}.nav-actions>.btn{display:none}.section{padding-block:60px}.hero{padding-top:48px;gap:30px}.hero h1{font-size:36px}.hero-art{min-height:300px}.demo-body{height:215px;padding:20px}.demo-title{font-size:25px}.window-demo{width:85%}.floating-note{font-size:10px}.category-grid{grid-template-columns:1fr 1fr;gap:9px}.category-tile{padding:16px;min-height:200px}.category-tile strong{font-size:17px}.category-tile small{font-size:11px}.journey{padding:22px}.journey>div{min-width:43%}.reading-card,.tool-panel,.organize-card{padding:20px}.faq-preview{grid-template-columns:1fr}.platform-grid{grid-template-columns:1fr 1fr;gap:9px}.platform-card{padding:17px}.download-lead{padding:25px}.release-mark{display:none}.privacy-strip{padding:26px}.footer-grid{gap:24px}.footer-bottom{display:block}.page-hero{padding:55px 0 38px}.page-hero h1{font-size:34px}.feature-entry h2{font-size:28px}.form-line{flex-wrap:wrap}.form-line button{width:100%}.horizontal-form{grid-template-columns:1fr}.bottom-nav{display:flex;position:fixed;z-index:35;bottom:0;left:0;right:0;background:var(--surface);border-top:1px solid var(--border);justify-content:space-around;padding:6px 0 max(6px,env(safe-area-inset-bottom))}.bottom-nav a{display:grid;text-align:center;font-size:20px;line-height:1.25;color:var(--title);min-width:60px}.bottom-nav a span{font-size:10px}.site-footer{padding-bottom:105px}.footer-grid{grid-template-columns:1fr 1fr}.hero-meta{margin-top:25px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition-duration:.01ms!important;animation-duration:.01ms!important}}