:root{--ink:#172b42;--muted:#55677a;--accent:#235dce;--soft:#edf4ff;--line:#dce5ee;--deep:#102c55}*{box-sizing:border-box}body{margin:0;background:#fff;color:var(--ink);font:16px/1.75 Arial,"Microsoft YaHei","PingFang SC",sans-serif}a{color:inherit;text-decoration:none}a:hover{color:var(--accent)}button{font:inherit}a:focus-visible,button:focus-visible{outline:3px solid var(--accent);outline-offset:5px}.wrap{width:min(1200px,calc(100% - 64px));margin:auto}h1,h2,h3,p{margin-top:0}.topline{background:var(--deep);color:#fff;padding:7px 0;font-size:12px;letter-spacing:.5px}.topline .wrap{display:flex;justify-content:space-between}.header{display:flex;align-items:center;justify-content:space-between;gap:25px;min-height:90px}.brand{display:inline-flex;gap:12px;align-items:center;font-weight:800;font-size:24px;letter-spacing:-.5px}.brand-mark{width:42px;height:42px;border-radius:12px;background:var(--accent);color:#fff;display:grid;place-items:center;font-size:23px;letter-spacing:-1px}.header nav{display:flex;gap:24px;font-size:14px;font-weight:600}header{border-bottom:1px solid var(--line)}.hero{background:var(--soft)}.hero-grid{display:grid;grid-template-columns:1.25fr 1fr;gap:80px;padding-top:66px;padding-bottom:64px;align-items:center}.eyebrow{font-size:12px;letter-spacing:1.5px;font-weight:700;color:var(--accent)}h1{font-size:54px;line-height:1.25;letter-spacing:-1.8px;margin:21px 0 25px}.hero h1 span{color:var(--accent)}.hero-copy>p{font-size:17px;line-height:1.95;max-width:540px;color:var(--muted)}.hero-actions{display:flex;gap:13px;flex-wrap:wrap;margin:29px 0 24px}.button{display:inline-flex;align-items:center;justify-content:center;padding:12px 22px;background:var(--accent);color:#fff;border:1px solid var(--accent);border-radius:7px;font-size:14px;font-weight:600;gap:15px}.button:hover{background:var(--deep);border-color:var(--deep);color:#fff}.button.secondary{background:transparent;color:var(--accent);border-color:var(--line)}.hero-trust{display:flex;gap:24px;font-size:12px;color:var(--muted)}.hero-trust span:before{content:'✓';margin-right:5px;color:var(--accent)}.start-panel{background:white;border:1px solid var(--line);padding:28px 30px;border-radius:16px;box-shadow:0 15px 35px #1835540a}.panel-label{display:flex;justify-content:space-between;font-size:12px;letter-spacing:1.5px;color:var(--muted)}.product-word{font-size:45px;font-weight:800;line-height:1.2;letter-spacing:-2px;margin:25px 0 22px;color:var(--accent)}.product-word>span{display:block;font-size:14px;font-weight:400;letter-spacing:0;color:var(--muted);margin-top:8px}.start-steps>a{display:flex;gap:18px;align-items:center;border-top:1px solid var(--line);padding:14px 0}.start-steps>a>b{font-size:13px;color:var(--accent);border:1px solid var(--line);border-radius:50%;width:31px;height:31px;display:grid;place-items:center}.start-steps strong{display:block;font-size:15px}.start-steps small{display:block;color:var(--muted);font-size:12px}.start-steps>a>span:last-child{margin-left:auto}.platform-strip{border-block:1px solid var(--line)}.platform-strip>.wrap{display:flex;justify-content:space-between;align-items:center;gap:20px;padding-block:19px;font-size:13px}.platform-strip strong{font-size:14px;font-weight:600}.platform-strip span{color:var(--muted)}.section{padding-block:54px}.section-heading{display:flex;align-items:center;justify-content:space-between;gap:24px;margin-bottom:28px}.section-heading h2{font-size:29px;line-height:1.45;letter-spacing:-.5px;margin:7px 0}.section-heading p{font-size:14px;color:var(--muted);margin:0}.section-heading>a{font-size:14px;white-space:nowrap;font-weight:600;color:var(--accent)}.app-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:20px}.app-card{padding:24px;border:1px solid var(--line);border-radius:12px;height:100%;display:flex;flex-direction:column;background:#fff}.app-top{display:flex;justify-content:space-between;align-items:center}.app-icon{display:grid;place-items:center;width:45px;height:45px;border-radius:11px;background:var(--soft);color:var(--accent);font-size:20px;font-weight:bold}.tag{font-size:12px;color:var(--muted)}.app-card h3{font-size:20px;margin:17px 0 4px;line-height:1.5}.platform{font-size:12px;color:var(--muted)}.app-card p{color:var(--muted);font-size:14px;line-height:1.85;margin:15px 0 20px;flex:1}.app-link{border-top:1px solid var(--line);padding-top:15px;font-size:14px;font-weight:bold;display:flex;justify-content:space-between}.guide-section{background:#f7f9fc;border-block:1px solid var(--line)}.guide-layout{display:grid;grid-template-columns:.8fr 1.3fr;gap:50px}.guide-note{padding:32px;background:var(--deep);border-radius:12px;color:#fff;display:flex;flex-direction:column;justify-content:center}.guide-note .eyebrow{color:#fff;opacity:.8}.guide-note h3{font-size:29px;line-height:1.55;margin:18px 0}.guide-note p{color:#e1e7ef;font-size:15px;line-height:1.9}.guide-note a{color:white;font-size:14px;margin-top:10px;font-weight:600}.guide-list>a{display:flex;align-items:center;gap:22px;border-bottom:1px solid var(--line);padding:20px 0}.guide-list>a:first-child{padding-top:8px}.guide-list>a:last-child{border:0}.number{font-size:29px;font-family:Georgia,serif;color:#667687}.guide-list h3{font-size:18px;line-height:1.6;margin:6px 0}.guide-list p{font-size:14px;color:var(--muted);margin:0}.guide-list>a>span:last-child{margin-left:auto}.article-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}.article-card{padding:25px;border:1px solid var(--line);border-radius:10px;display:flex;flex-direction:column}.article-card h3{font-size:19px;line-height:1.7;margin:12px 0}.article-card p{font-size:14px;color:var(--muted);flex:1}.meta{display:flex;justify-content:space-between;border-top:1px solid var(--line);padding-top:16px;color:var(--muted);font-size:12px}.category-links{display:flex;gap:30px;margin-top:28px;font-size:14px;color:var(--accent)}.source-banner{display:flex;align-items:center;justify-content:space-between;gap:28px;border:1px solid var(--line);background:var(--soft);border-radius:12px;padding:32px 38px;margin-bottom:55px}.source-banner h2{font-size:27px;margin:9px 0}.source-banner p{font-size:14px;color:var(--muted);margin:0;max-width:620px}.source-banner>.button{flex-shrink:0}footer{padding-top:40px;background:#f8fafc;border-top:1px solid var(--line)}.footer{display:grid;grid-template-columns:3fr 1fr 1fr;gap:40px;padding-bottom:30px}.footer p{font-size:14px;color:var(--muted);margin:10px 0}.footer small{font-size:12px;color:var(--muted)}.footer>div:not(:first-child){display:flex;flex-direction:column;font-size:14px;gap:10px}.copyright{display:flex;justify-content:space-between;padding-block:20px;border-top:1px solid var(--line);font-size:12px;color:var(--muted)}.page-intro{padding-top:37px}.page-intro h1{font-size:39px;margin-top:25px;letter-spacing:-.8px}.page-intro p{color:var(--muted)}.breadcrumb{font-size:13px;color:var(--muted)}.filters{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:24px}.filter{cursor:pointer;padding:8px 20px;background:#fff;border:1px solid var(--line);border-radius:6px;color:var(--ink);font-size:14px}.filter.active{background:var(--accent);border-color:var(--accent);color:#fff}.category-articles{margin-top:25px}.info-box{margin-top:30px;background:var(--soft);padding:27px;border-radius:10px}.info-box h2{font-size:22px}.info-box p{color:var(--muted);font-size:15px;margin-bottom:0}.detail-layout{display:grid;grid-template-columns:minmax(0,2.2fr) minmax(230px,1fr);gap:65px;padding-top:25px}.prose{max-width:800px;overflow-wrap:anywhere}.prose h2{font-size:25px;margin:30px 0 17px;scroll-margin-top:20px}.prose h3{font-size:21px}.prose p,.prose li{line-height:1.95;color:#40556a}.prose a:not(.button){color:var(--accent);text-decoration:underline;text-underline-offset:4px}.prose pre{background:#f1f4f8;overflow-x:auto;padding:20px;border-radius:8px;font-size:14px}.prose table{border-collapse:collapse;display:block;overflow-x:auto}.prose th,.prose td{border:1px solid var(--line);padding:9px 15px}.prose blockquote{border-left:3px solid var(--accent);padding-left:20px;margin-left:0}.detail-aside{padding:25px;border:1px solid var(--line);border-radius:10px;position:sticky;top:24px;height:max-content;overflow-wrap:anywhere}.detail-aside h2{font-size:21px;margin:10px 0}.detail-aside p,.detail-aside a{font-size:14px}.detail-aside p{color:var(--muted)}.toc{display:block;margin:15px 0}.article-meta{font-size:13px;color:var(--muted)}hr{border:0;border-top:1px solid var(--line);margin:22px 0}.skip{position:absolute;top:-100px;left:10px;background:white;padding:10px;z-index:10}.skip: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}[hidden]{display:none!important}
.theme-fly{--accent:#14677d;--soft:#edf8fb;--deep:#112f42;--ink:#152e3b}.theme-fly .hero{background:#102e41;color:#fff}.theme-fly .hero h1 span{color:#83e4f2}.theme-fly .hero-copy>.eyebrow,.theme-fly .hero-copy>p,.theme-fly .hero-trust{color:#d1e4ec}.theme-fly .hero .button{background:#a4eaf3;color:#123643;border-color:#a4eaf3}.theme-fly .hero .secondary{background:transparent;color:#fff;border-color:#7597a9}.theme-fly .start-panel{background:#183d51;border-color:#41667b;border-radius:6px;box-shadow:none}.theme-fly .panel-label,.theme-fly .product-word>span,.theme-fly .start-steps small{color:#d0e4ed}.theme-fly .product-word,.theme-fly .start-steps>a>b,.theme-fly .hero-trust span:before{color:#8de5f3}.theme-fly .start-steps>a{border-color:#41667b}.theme-fly .start-steps>a>b{border-color:#628197}.theme-fly .start-steps>a:hover{color:#8de5f3}.theme-fly .app-card{border-radius:6px;border-top:3px solid #4b9cb1}.theme-neko{--accent:#6540ab;--deep:#30234e;--soft:#f3effb;--line:#e3ddef;--ink:#29213c}.theme-neko .hero-grid{grid-template-columns:1fr 1.1fr}.theme-neko .start-panel{border-radius:24px;box-shadow:10px 10px 0 #e5dcf5}.theme-neko .brand-mark{border-radius:50%}.theme-neko .product-word{font-size:56px}.theme-fl{--accent:#096e87;--deep:#153d4b;--soft:#eef9fc;--line:#d4e8ed}.theme-fl .hero{background:#fff}.theme-fl .start-panel{background:var(--soft);box-shadow:none;border-radius:8px;border-top:4px solid var(--accent)}.theme-fl .hero h1{font-size:59px}.theme-fl .platform-strip{background:var(--deep);color:white}.theme-fl .platform-strip span{color:#d8e9ee}.theme-open{--accent:#a54223;--deep:#303539;--soft:#faf2ee;--line:#e8dfd9;--ink:#303539}.theme-open .hero{background:#f5f3f0}.theme-open .hero-grid{grid-template-columns:1.25fr 1fr}.theme-open .start-panel{border-radius:2px;border-top:4px solid #a54223;box-shadow:8px 8px 0 #e7e2dc}.theme-open .product-word{font-family:Consolas,monospace;font-size:43px;letter-spacing:-2px}.theme-open .app-card,.theme-open .article-card,.theme-open .button,.theme-open .guide-note{border-radius:3px}.theme-cat .hero{background:linear-gradient(110deg,#f3f7ff,#eaf2ff)}.theme-cat .start-panel{transform:rotate(-1deg)}
@media(max-width:1100px){.wrap{width:calc(100% - 48px)}.header nav{gap:15px;font-size:13px}.brand{font-size:21px}.hero-grid{gap:35px}h1,.theme-fl .hero h1{font-size:45px}.start-panel{padding:25px}.app-grid{grid-template-columns:repeat(2,1fr)}}@media(max-width:760px){.wrap{width:calc(100% - 36px)}.topline .wrap>span:last-child{display:none}.header{padding-block:17px;display:block}.header nav{margin-top:19px;flex-wrap:wrap;gap:13px 23px;font-size:14px}.brand{font-size:23px}.hero-grid,.theme-neko .hero-grid,.theme-open .hero-grid{grid-template-columns:1fr;padding-block:38px;gap:28px}h1,.theme-fl .hero h1{font-size:42px}.hero-copy>p{font-size:16px}.hero-trust{gap:16px}.start-panel{padding:23px}.product-word,.theme-neko .product-word{font-size:43px}.theme-open .product-word{font-size:38px}.platform-strip>.wrap{flex-wrap:wrap;gap:8px 17px;padding-block:17px}.platform-strip strong{font-size:13px}.platform-strip>.wrap>a{margin-left:auto}.section{padding-block:35px}.section-heading{align-items:flex-start;gap:14px}.section-heading h2{font-size:24px}.section-heading>a{font-size:12px;margin-top:30px}.section-heading p{font-size:13px}.app-grid,.article-grid,.guide-layout{grid-template-columns:1fr}.guide-layout{gap:25px}.guide-note{padding:27px}.guide-note h3{font-size:26px}.guide-list>a{gap:15px}.guide-list h3{font-size:17px}.number{font-size:25px}.category-links{gap:14px 24px;flex-wrap:wrap}.source-banner{padding:27px;flex-direction:column;align-items:flex-start;margin-bottom:36px}.source-banner h2{font-size:23px}.footer{grid-template-columns:1fr 1fr;gap:25px}.footer>div:first-child{grid-column:1/-1}.copyright{flex-wrap:wrap;gap:8px 20px}.page-intro h1{font-size:31px}.detail-layout{grid-template-columns:1fr;gap:25px}.detail-aside{position:static}.filter{padding:7px 15px}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}

.knowledge-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.knowledge-grid>a{display:block;padding:23px;border:1px solid var(--line);border-radius:10px;background:#fff}.knowledge-grid>a>span{font-size:12px;color:var(--accent,var(--green))}.knowledge-grid h3{font-size:18px;line-height:1.65;margin:8px 0 12px}.knowledge-grid p{font-size:14px;color:var(--muted);margin:0}.faq-section{padding-top:15px}.faq-list{border-top:1px solid var(--line)}.faq-list details{border-bottom:1px solid var(--line);padding:20px 0}.faq-list summary{cursor:pointer;font-size:16px;font-weight:600;line-height:1.7}.faq-list p{max-width:900px;margin:14px 0 3px;color:var(--muted);font-size:15px;line-height:1.9}.faq-list summary:focus-visible{outline:3px solid var(--accent,var(--green));outline-offset:5px}.article-path{display:flex;flex-wrap:wrap;gap:12px;padding-top:25px;font-size:13px;color:var(--muted)}.article-path+.page-intro{padding-top:15px}.article-path+.page-intro>.breadcrumb{display:none}.related-section{border-top:1px solid var(--line)}.related-section>h2{font-size:25px}.back-category{display:inline-block;margin-top:22px;font-size:14px;text-decoration:underline;text-underline-offset:4px}.not-found{min-height:70vh}.prose table{display:block;max-width:100%;overflow:auto;border-collapse:collapse;margin:25px 0}.prose th,.prose td{border:1px solid var(--line);padding:10px 15px;font-size:14px;min-width:110px}.prose pre{overflow:auto;max-width:100%;padding:20px;background:#f2f5f7;border-radius:8px;font-size:14px}.prose{overflow-wrap:anywhere}@media(max-width:760px){.knowledge-grid{grid-template-columns:1fr}.faq-list summary{font-size:15px}.knowledge-grid h3{font-size:17px}}

/* evidence notes */
.prose blockquote{margin:0 0 26px;padding:16px 20px;border-left:3px solid var(--accent,var(--green,#245d4d));background:#f2f6f7;border-radius:0 8px 8px 0}.prose blockquote p{margin:0;font-size:14px;color:#42535a}.prose pre code{overflow-wrap:normal;word-break:normal}.prose h2{scroll-margin-top:24px}

.detail-layout > *{min-width:0}.prose{min-width:0;width:100%}@media(max-width:760px){.detail-layout{grid-template-columns:minmax(0,1fr)}}