:root{--accent:#145ec1;--accent-dark:#08458f;--ink:#172b45;--muted:#53657a;--surface:#f4f7fb;--line:#dce4ee;--radius:8px;--font-display:"Microsoft YaHei","PingFang SC",sans-serif;--header-height:80px}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:100px}body{margin:0;color:var(--ink);background:#fff;font:16px/1.8 "Microsoft YaHei","PingFang SC","Noto Sans CJK SC",sans-serif}button,input,select,textarea{font:inherit}button,a,input,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer}a{color:var(--accent);text-decoration:none;text-underline-offset:4px}a:hover{text-decoration:underline}a,button,input,select{outline-offset:4px}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #c58020}img{max-width:100%;height:auto}h1,h2,h3,h4{font-family:var(--font-display);line-height:1.4;color:var(--ink);overflow-wrap:break-word}h1{font-size:36px;letter-spacing:-.035em;margin:0 0 20px}h2{font-size:27px;margin:0 0 20px}h3{font-size:19px;margin:0 0 12px}p{margin:0 0 18px}ul,ol{padding-left:1.5em}li+li{margin-top:5px}[hidden]{display:none!important}.container{width:min(1200px,calc(100% - 64px));margin-inline:auto}.section{padding:52px 0}.section-heading{display:flex;justify-content:space-between;align-items:end;gap:32px;margin-bottom:30px}.section-heading h2{margin-bottom:8px}.section-heading p{max-width:520px;color:var(--muted);margin:0}.eyebrow{color:var(--accent);font-weight:700;font-size:13px;letter-spacing:.08em;margin:0 0 12px}.muted{color:var(--muted)}.text-link{font-weight:600}.button{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:11px 22px;border:1px solid var(--accent);border-radius:var(--radius);background:var(--accent);color:#fff;font-size:15px;font-weight:600;line-height:1.5;text-align:center;text-decoration:none;white-space:normal}.button:hover{background:var(--accent-dark);border-color:var(--accent-dark);color:#fff;text-decoration:none}.button.secondary{color:var(--accent);background:#fff;border-color:#aabed8}.button.secondary:hover{background:var(--surface)}.button.small{padding:8px 14px;min-height:44px;font-size:14px}.button-row{display:flex;gap:12px;flex-wrap:wrap}.skip-link{position:fixed;top:8px;left:12px;z-index:1000;padding:10px 18px;background:#fff;border:2px solid var(--accent);transform:translateY(-160%)}.skip-link:focus{transform:none}
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.97);border-bottom:1px solid var(--line)}.header-inner{min-height:var(--header-height);display:flex;align-items:center;gap:28px}.brand-lockup{display:inline-flex;align-items:center;gap:10px;color:var(--ink);font-size:21px;font-weight:750;white-space:nowrap;flex-shrink:0}.brand-lockup:hover{text-decoration:none}.brand-lockup img{width:51px;height:51px;object-fit:contain;flex-shrink:0}.nav-list{display:flex;align-items:center;gap:24px;margin-left:auto}.nav-list a{font-size:14px;white-space:nowrap;color:var(--ink);padding:25px 0;border-bottom:2px solid transparent}.nav-list a:hover,.nav-list a[aria-current=page]{color:var(--accent);border-bottom-color:var(--accent);text-decoration:none}.header-register{min-height:44px;padding:10px 17px;font-size:14px;flex-shrink:0}.menu-toggle{border:1px solid var(--line);background:white;color:var(--ink);border-radius:5px;min-height:44px;padding:8px 11px}.js-only{display:none}html.js .js-only{display:block}html.js .menu-toggle{display:none}.breadcrumb{font-size:13px;color:var(--muted);margin-bottom:18px;display:flex;gap:9px;flex-wrap:wrap}.breadcrumb a{color:var(--muted)}.page-intro{padding:34px 0 38px;background:var(--surface);border-bottom:1px solid var(--line)}.page-intro h1{font-size:34px;line-height:1.4}.page-intro p{max-width:760px;color:var(--muted);margin:0}.page-body{padding:42px 0 56px}.intro-note{max-width:900px;margin-bottom:28px}.notice,.price-guide{padding:20px 24px;border-left:3px solid var(--accent);background:var(--surface);margin-bottom:28px;color:var(--ink)}.notice p:last-child,.price-guide p:last-child{margin:0}.price-guide strong{display:block;margin-bottom:6px}.mini-label{color:var(--muted);font-size:13px}
.media-zoom{display:block;position:relative;width:100%;padding:0;border:0;background:transparent;border-radius:var(--radius);overflow:hidden;cursor:zoom-in;line-height:0}.media-zoom picture,.media-zoom img{display:block;width:100%;height:auto;object-fit:contain}.media-zoom:after{content:"点击放大";position:absolute;right:12px;bottom:10px;padding:5px 9px;color:#fff;background:rgba(18,39,65,.78);font:12px/1.4 "Microsoft YaHei",sans-serif;border-radius:4px;opacity:0;transition:opacity .15s}.media-zoom:hover:after,.media-zoom:focus-visible:after{opacity:1}.media-zoom:focus-visible{outline-offset:5px}.faq-list{border-top:1px solid var(--line)}.faq-item{padding:23px 0;border-bottom:1px solid var(--line)}.faq-item h3{font-size:16px;margin-bottom:10px;line-height:1.6}.faq-item p{font-size:15px;color:var(--muted);margin:0;max-width:920px}.faq-page .faq-list{max-width:940px}.faq-page .faq-item{padding:25px 0}
.filter-bar{padding:20px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);margin:24px 0 18px;gap:16px;grid-template-columns:2fr 1fr 1fr auto;align-items:end}html.js .filter-bar{display:grid}.filter-bar label,.search-bar label{display:block;font-size:13px;font-weight:600;color:var(--muted)}.filter-bar input,.filter-bar select,.search-bar input,.search-bar select{display:block;width:100%;min-width:0;min-height:44px;border:1px solid #aebed0;border-radius:5px;background:#fff;color:var(--ink);padding:8px 12px;margin-top:6px}.result-count{font-size:14px;margin:18px 0;color:var(--muted)}.empty-state{padding:30px;border:1px dashed #a9bdd0;border-radius:var(--radius);background:var(--surface);text-align:center;color:var(--muted)}.table-wrap{width:100%;margin:20px 0}.price-table,.selection-table{width:100%;border-collapse:collapse;font-size:14px;table-layout:auto}.price-table caption,.selection-table caption{text-align:left;font-weight:600;color:var(--ink);padding:0 0 13px;font-size:16px}.price-table th,.selection-table th{text-align:left;padding:15px 13px;background:var(--surface);font-size:13px;color:var(--muted);border-block:1px solid var(--line)}.price-table td,.selection-table td{padding:17px 13px;border-bottom:1px solid var(--line);vertical-align:middle;line-height:1.65}.price-table td:first-child{width:22%;min-width:140px;font-weight:600}.price-table .product-note{display:block;font-size:12px;font-weight:400;color:var(--muted);max-width:24em;margin-top:5px}.price-table .price-number{font-size:22px;font-weight:750;color:var(--accent-dark);white-space:nowrap}.price-table del{color:var(--muted);white-space:nowrap}.price-table .price-unit{display:block;font-size:11px;color:var(--muted);white-space:nowrap}.price-table .discount-label{display:inline-block;margin-top:4px;font-size:11px;color:var(--accent-dark);background:var(--surface);border:1px solid var(--line);border-radius:3px;padding:1px 5px}.price-table tr:target{background:#fff7df;outline:2px solid #d59b37;outline-offset:-2px}.price-table tr{scroll-margin-top:110px}.protocol-badge{display:inline-block;background:var(--surface);border:1px solid var(--line);padding:4px 7px;border-radius:4px;line-height:1.45;font-size:12px;color:var(--accent-dark)}.policy-list{margin:30px 0 0;padding:22px 25px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius)}.policy-list h2{font-size:21px}.policy-list p,.policy-list li{font-size:14px;color:var(--muted)}
.selection-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;margin:28px 0}.selection-card{padding:26px;border:1px solid var(--line);border-radius:var(--radius)}.selection-card p{color:var(--muted);font-size:15px}.selection-card ul{color:var(--muted);font-size:14px;margin-bottom:20px}.selection-card .tag{font-size:12px;color:var(--accent-dark);margin-bottom:10px;display:block}.selection-table{margin:25px 0}.task-flow{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));border:1px solid var(--line);border-radius:var(--radius);margin:25px 0;overflow:hidden}.task-flow article{padding:22px;border-right:1px solid var(--line)}.task-flow article:last-child{border:0}.task-flow h3{font-size:16px}.task-flow p{font-size:14px;color:var(--muted);margin-bottom:0}.task-flow .step-number{display:block;color:var(--accent);font-weight:750;margin-bottom:8px}.search-bar{display:grid;grid-template-columns:2fr 1fr auto;gap:15px;align-items:end;margin-bottom:18px}.help-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.help-item{border:1px solid var(--line);border-radius:var(--radius);padding:22px 24px;min-width:0}.help-item h2{font-size:18px;margin-bottom:12px;line-height:1.55}.help-item p{font-size:14px;color:var(--muted);line-height:1.8;margin-bottom:15px}.help-item .category-label{display:block;font-size:12px;color:var(--accent);margin-bottom:10px}.help-item a{font-size:14px;font-weight:600}.help-intro{padding:24px;background:var(--surface);border-left:3px solid var(--accent);margin-bottom:25px}.help-intro p{margin:0}.sitemap-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:25px}.sitemap-grid section{border:1px solid var(--line);padding:26px;border-radius:var(--radius)}.sitemap-grid h2{font-size:20px}.sitemap-grid ul{list-style:none;margin:0;padding:0}.sitemap-grid li{padding:8px 0;border-bottom:1px solid var(--line)}.error-page{text-align:center;padding:70px 24px 90px}.error-page h1{font-size:36px}.error-code{font-size:80px;font-weight:750;line-height:1.2;color:var(--accent);margin-bottom:20px}.error-page p{max-width:600px;margin:0 auto 25px;color:var(--muted)}.error-page .button-row{justify-content:center}
.tutorial-layout{display:grid;grid-template-columns:250px minmax(0,1fr);gap:44px;align-items:start}.tutorial-toc{position:sticky;top:106px;max-height:calc(100vh - 130px);overflow:auto;border:1px solid var(--line);border-radius:var(--radius);padding:20px;font-size:13px}.tutorial-toc h2{font-size:16px;margin-bottom:15px}.tutorial-toc ol{padding-left:20px;margin:0}.tutorial-toc li{padding:4px 0}.tutorial-toc a{color:var(--muted);line-height:1.65}.tutorial-toc a:hover{color:var(--accent)}.tutorial-content{min-width:0;font-size:17px;line-height:1.9;overflow-wrap:anywhere}.tutorial-content section{scroll-margin-top:105px;margin-bottom:42px}.tutorial-content h2{font-size:25px;margin:0 0 20px;padding-bottom:13px;border-bottom:1px solid var(--line);line-height:1.5}.tutorial-content h3{font-size:19px;margin-top:25px}.tutorial-content p{margin:0 0 20px}.tutorial-content li{margin-bottom:8px}.tutorial-content img{width:100%;height:auto;display:block}.tutorial-content .media-zoom{margin:24px 0 12px;border:1px solid var(--line);border-radius:6px}.tutorial-content figure{margin:25px 0}.tutorial-content figcaption{font-size:14px;color:var(--muted)}.tutorial-content blockquote{margin:25px 0;padding:18px 22px;background:var(--surface);border-left:3px solid var(--accent);font-size:15px}.tutorial-content table{border-collapse:collapse;width:100%;font-size:14px}.tutorial-content td,.tutorial-content th{border:1px solid var(--line);padding:9px;overflow-wrap:anywhere}.tutorial-content code{background:var(--surface);border-radius:3px;padding:2px 5px;font-size:.92em}.tutorial-content pre{max-width:100%;overflow:auto;white-space:pre-wrap;padding:18px;background:var(--surface)}.tutorial-mobile{display:none;margin:0 0 28px;border:1px solid var(--line);padding:15px 20px;border-radius:var(--radius);background:var(--surface)}.tutorial-mobile summary{cursor:pointer;font-size:15px;font-weight:600}.tutorial-mobile ol{font-size:14px;line-height:1.7}.tutorial-mobile li{margin:7px 0}.tutorial-end{padding:25px;border:1px solid var(--line);border-radius:var(--radius);background:var(--surface)}.tutorial-end h2{font-size:21px}
.site-footer{padding:45px 0 0;background:var(--surface);border-top:1px solid var(--line)}.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:38px;padding-bottom:30px}.footer-grid>div{min-width:0}.footer-grid .brand-lockup{font-size:18px;margin-bottom:15px}.footer-grid .brand-lockup img{width:45px;height:45px}.footer-grid p{font-size:13px;color:var(--muted);line-height:1.9;max-width:320px}.footer-grid h2,.footer-grid h3{font-size:14px;margin:8px 0 17px}.footer-grid ul{list-style:none;padding:0;margin:0}.footer-grid li{margin:0 0 9px;font-size:13px}.footer-grid a{color:var(--muted)}.footer-filings{display:flex;justify-content:center;align-items:center;gap:14px 22px;flex-wrap:wrap;border-top:1px solid var(--line);padding-top:20px;font-size:12px}.footer-filings a{color:var(--muted);display:inline-flex;align-items:center;gap:5px}.footer-filings img{width:17px;height:17px}.copyright{text-align:center;font-size:13px;color:var(--ink);margin:18px 0 6px;width:100%}.usage-note{text-align:center;font-size:12px;color:var(--muted);padding:0 0 24px;margin:0}
.support-tools{position:fixed;right:20px;bottom:24px;z-index:70;display:flex;flex-direction:column;gap:12px}.support-tools button{display:flex;align-items:center;justify-content:center;width:48px;height:48px;border:2px solid #fff;border-radius:50%;color:white;box-shadow:0 3px 14px #152b4926}.support-tools svg{width:25px;height:25px;fill:currentColor}.support-tools [data-contact=qq]{background:#1469c7}.support-tools [data-contact=wechat]{background:#138550}.modal-open .support-tools{visibility:hidden}.contact-fallback{font-size:13px}.support-tools noscript{position:fixed;right:12px;bottom:12px;max-width:190px;background:#fff;color:var(--ink);padding:8px;border:1px solid var(--line);border-radius:4px}
dialog{padding:0;border:0;border-radius:12px;max-width:min(460px,calc(100vw - 32px));max-height:calc(100dvh - 40px);color:var(--ink);box-shadow:0 22px 90px #0004;background:#fff}dialog::backdrop{background:#102039b8;backdrop-filter:blur(3px)}dialog[open]{animation:dialog-in .15s ease-out}.dialog-panel{padding:32px;position:relative}.dialog-panel h2{font-size:23px;padding-right:30px}.dialog-close{position:absolute;right:15px;top:12px;border:0;background:var(--surface);color:var(--ink);width:44px;height:44px;border-radius:50%;font-size:24px;line-height:1}.dialog-panel p{font-size:15px;color:var(--muted)}.dialog-panel input{display:block;border:1px solid var(--line);border-radius:5px;font-size:22px;font-weight:600;width:100%;padding:12px;margin:18px 0;background:var(--surface);color:var(--ink)}.dialog-panel .qr-image{display:block;width:min(280px,100%);height:auto;margin:10px auto 20px}.copy-status{font-size:14px!important;min-height:24px;color:var(--accent-dark)!important;margin:15px 0 0!important}.image-dialog{max-width:min(1450px,calc(100vw - 24px));width:max-content;background:#fff;overflow:auto}.image-dialog .dialog-panel{padding:45px 12px 12px}.image-dialog img{display:block;max-width:100%;max-height:calc(100dvh - 100px);width:auto;height:auto;object-fit:contain;margin:auto}.image-dialog .dialog-close{position:fixed;right:24px;top:20px;background:#fff;box-shadow:0 2px 10px #0002;z-index:2}.image-dialog p{font-size:13px;margin:12px 8px 3px;color:var(--muted)}.modal-open{overflow:hidden}@keyframes dialog-in{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
@media(min-width:1450px){.container{width:min(1200px,calc(100% - 96px))}}
@media(max-width:1050px){.header-inner{gap:18px}.nav-list{gap:15px}.brand-lockup{font-size:19px}.footer-grid{gap:25px}.tutorial-layout{grid-template-columns:210px minmax(0,1fr);gap:30px}.filter-bar{grid-template-columns:2fr 1fr 1fr}.filter-bar>button{grid-column:3}}
@media(max-width:860px){:root{--header-height:64px}.container{width:calc(100% - 40px)}.header-inner{position:relative;min-height:64px;gap:12px;flex-wrap:wrap}.brand-lockup{font-size:18px;gap:7px}.brand-lockup img{width:42px;height:42px}.header-register{margin-left:auto;font-size:14px;padding:8px 10px;min-height:44px}.menu-toggle{margin-left:0;font-size:14px;min-height:44px;padding:7px 9px}html.js .menu-toggle{display:inline-flex}.nav-list{width:100%;flex-basis:100%;order:4;margin:0;gap:0;display:flex;flex-wrap:wrap;border-top:1px solid var(--line);padding:5px 0 10px}.nav-list a{padding:10px 12px;border-bottom:0;font-size:14px}.section{padding:34px 0}.section-heading{display:block;margin-bottom:22px}.section-heading p{margin-top:12px}.page-intro{padding:25px 0 28px}.page-intro h1{font-size:29px}.page-body{padding:30px 0 40px}.tutorial-layout{display:block}.tutorial-toc{display:none}.tutorial-mobile{display:block}.tutorial-content{max-width:840px;margin:auto;font-size:17px}.tutorial-content h2{font-size:23px}.selection-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.task-flow{grid-template-columns:repeat(2,minmax(0,1fr))}.task-flow article{border-bottom:1px solid var(--line)}.task-flow article:nth-child(2){border-right:0}.task-flow article:nth-child(n+3){border-bottom:0}.footer-grid{grid-template-columns:1.4fr 1fr;gap:28px}.site-footer{padding-top:32px}.footer-grid p{max-width:100%}.sitemap-grid{grid-template-columns:1fr 1fr}.support-tools{right:14px;bottom:18px}.support-tools button{width:44px;height:44px}.support-tools svg{width:23px;height:23px}.usage-note{padding-bottom:100px}.image-dialog .dialog-close{right:18px;top:14px}.search-bar{grid-template-columns:1fr 1fr}.search-bar>button{grid-column:2}.price-table{font-size:13px}.price-table td,.price-table th{padding-inline:9px}.price-table .button{font-size:14px;padding-inline:9px}.price-table .product-note{font-size:11px}}
@media(max-width:600px){h1{font-size:30px}h2{font-size:24px}.container{width:calc(100% - 36px)}.brand-lockup{font-size:16px;gap:5px}.brand-lockup img{width:36px;height:36px}.header-inner{gap:8px}.header-register{font-size:14px;padding:8px}.menu-toggle{font-size:14px;padding:7px 8px}.page-intro h1{font-size:27px}.breadcrumb{font-size:12px;gap:6px}.button{padding:10px 18px;min-height:44px;font-size:14px}.button-row{gap:10px}.section-heading h2{font-size:24px}.filter-bar{grid-template-columns:1fr 1fr;padding:16px;gap:13px}.filter-bar label:first-child{grid-column:1/-1}.filter-bar>button{grid-column:1/-1;width:100%}.filter-bar input,.filter-bar select{font-size:14px;padding:8px;max-width:100%}.price-table,.price-table tbody{display:block}.price-table thead{display:none}.price-table caption{display:block;font-size:15px;padding:0 0 13px}.price-table tr{display:block;padding:16px;border:1px solid var(--line);border-radius:var(--radius);margin:0 0 15px;background:#fff}.price-table td{display:flex;align-items:baseline;justify-content:space-between;gap:12px;border:0;padding:6px 0;min-width:0;width:100%!important;max-width:100%;text-align:right}.price-table td:before{content:attr(data-label);font-size:12px;flex-shrink:0;color:var(--muted);font-weight:400;text-align:left}.price-table td:first-child{display:block;text-align:left;font-size:16px;font-weight:700;border-bottom:1px solid var(--line);padding:0 0 12px;margin-bottom:8px}.price-table td:first-child:before{display:none}.price-table .product-note{font-size:12px;margin-top:7px;max-width:none;font-weight:400}.price-table .price-number{font-size:25px}.price-table .price-unit{display:inline;font-size:11px}.price-table td:last-child{padding-top:13px}.price-table td:last-child:before{display:none}.price-table td:last-child .button{width:100%;min-height:44px;font-size:14px}.price-table .protocol-badge{font-size:12px}.table-wrap{margin-top:18px}.notice,.price-guide{padding:17px 18px;font-size:14px}.selection-grid{grid-template-columns:1fr;gap:15px}.selection-card{padding:22px}.selection-table{display:block;overflow:auto;font-size:13px}.selection-table td,.selection-table th{min-width:110px;padding:11px}.task-flow{grid-template-columns:1fr}.task-flow article{border-right:0;border-bottom:1px solid var(--line)!important;padding:19px 21px}.task-flow article:last-child{border-bottom:0!important}.help-grid{grid-template-columns:1fr;gap:14px}.help-item{padding:20px}.help-item h2{font-size:17px}.search-bar{grid-template-columns:1fr}.search-bar>button{grid-column:auto}.sitemap-grid{grid-template-columns:1fr}.sitemap-grid section{padding:23px}.tutorial-content h2{font-size:22px}.tutorial-content{font-size:16px;line-height:1.9}.tutorial-content section{margin-bottom:34px}.tutorial-content .media-zoom{margin-top:20px}.tutorial-content table{font-size:12px}.tutorial-content td,.tutorial-content th{padding:6px}.tutorial-mobile{padding:13px 17px}.tutorial-end{padding:21px}.footer-grid{grid-template-columns:1fr 1fr;gap:24px 20px}.footer-grid>div:first-child{grid-column:1/-1}.footer-grid>div:last-child{grid-column:1/-1}.footer-grid .brand-lockup{font-size:19px}.footer-grid .brand-lockup img{width:43px;height:43px}.footer-grid h2,.footer-grid h3{font-size:14px}.footer-filings{font-size:11px;gap:10px 16px;justify-content:center}.copyright{font-size:12px;margin-top:18px}.usage-note{font-size:11px;line-height:1.9;padding-bottom:105px}.support-tools{gap:10px;right:12px;bottom:max(16px,env(safe-area-inset-bottom))}.dialog-panel{padding:27px 23px}.dialog-panel h2{font-size:21px}.faq-item{padding:21px 0}.faq-item h3{font-size:16px}.faq-item p{font-size:14px;line-height:1.9}.error-page{padding:50px 18px 70px}.error-code{font-size:64px}.error-page h1{font-size:28px}.media-zoom:after{opacity:1;font-size:10px;right:7px;bottom:7px;padding:3px 6px}}
.header-inner>nav{margin-left:auto}.nav-list{list-style:none;padding-left:0}.nav-register-item{display:none}.footer-bottom{padding-bottom:25px}.footer-bottom>p:first-child{text-align:center;color:var(--muted);font-size:12px;margin-bottom:16px}.footer-qr{display:inline-block}.info-card p{color:var(--muted)}.related-links{display:flex;flex-wrap:wrap;gap:12px 20px;margin-top:25px}.help-overview{margin-bottom:25px}.help-overview p{max-width:850px;color:var(--muted)}.process-list{padding-left:23px}.process-list li{padding:8px 0}.comparison-table td,.comparison-table th{line-height:1.75}html.js .support-tools .js-only{display:flex}.tutorial-preparation{padding:20px 22px;margin-bottom:30px;background:var(--surface);border-left:3px solid var(--accent)}.completion-check{padding:24px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);margin-top:35px}.completion-check h2{font-size:21px}.page-getting-started .tutorial-layout{padding-top:5px}.page-help .help-item h3{font-size:18px}.footer-bottom .footer-filings{margin-top:0}
@media(max-width:860px){.header-inner>.brand-lockup{order:1}.header-inner>.header-register{order:2}.header-inner>.menu-toggle{order:3}.header-inner>nav{margin-left:0;flex-basis:100%;width:100%;order:4}.nav-list{border-top:1px solid var(--line)}.nav-list li{margin:0}.nav-register-item{display:block}.nav-list .nav-register{padding:9px 14px;min-height:44px;margin:2px 0 3px 9px;color:#fff}.footer-bottom{padding-bottom:105px}.footer-bottom>p:first-child{font-size:11px}.tutorial-preparation{padding:17px;font-size:15px}.price-table .price-cell>div{display:inline-block}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation:none!important;transition:none!important}}

/* Fengxun A: blue and white product presentation, grouped by line. */
:root {
  --accent: #1555d3;
  --accent-dark: #1043a8;
  --ink: #102744;
  --muted: #52657c;
  --surface: #f3f7fc;
  --line: #dbe4ef;
  --radius: 6px;
  --header-height: 78px;
  --font-display: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", sans-serif;
}
body.brand-fengxun.style-a { color: var(--ink); font-family: var(--font-display); font-size: 16px; }
h1, h2, h3 { letter-spacing: -.025em; }
h2 { font-size: 29px; line-height: 1.4; }
.container { max-width: 1200px; }
.section { padding-block: 46px; }
.button { border-radius: 6px; box-shadow: none; font-size: 15px; font-weight: 600; transition: background-color .18s ease, border-color .18s ease; }
.button.secondary { background: #fff; border-color: #b8cbe6; color: var(--accent-dark); }
.button.secondary:hover { background: #edf4ff; border-color: var(--accent); }
.eyebrow { color: var(--accent-dark); font-size: 14px; font-weight: 600; letter-spacing: .025em; margin-bottom: 9px; }
.fx-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; }
.fx-actions .button { min-height: 44px; padding-inline: 20px; font-size: 15px; }
.fx-text-link { display: inline-flex; align-items: baseline; gap: 8px; color: var(--accent-dark); font-weight: 600; line-height: 1.7; font-size: 15px; text-decoration: none; }
.fx-text-link:hover { text-decoration: underline; }

/* A single, compact brand header; navigation contains only local pages. */
.site-header.fx-site-header { background: #fff; border-bottom: 1px solid var(--line); box-shadow: none; }
.fx-site-header .header-inner { min-height: 78px; gap: 26px; }
.brand-lockup { gap: 9px; }
.fx-site-header .header-inner > nav { margin-left: auto; }
.fx-site-header .nav-list { list-style: none; margin: 0; padding: 0; gap: 30px; }
.fx-site-header .nav-list li { margin: 0; }
.fx-site-header .nav-list a { display: inline-flex; align-items: center; min-height: 44px; padding: 0; font-size: 15px; font-weight: 500; }
.fx-site-header .header-register { margin: 0; font-size: 14px; }

.fx-hero { background: #eef4fc; border-bottom: 1px solid #e0e9f5; }
.fx-hero-grid { display: grid; grid-template-columns: .89fr 1.11fr; align-items: center; gap: 40px; padding-block: 36px; }
.fx-hero-copy, .fx-hero-media, .fx-products-media, .fx-line-list { min-width: 0; }
.fx-hero h1 { font-size: 42px; line-height: 1.32; margin: 12px 0 18px; font-weight: 750; color: #0d2444; }
.fx-hero h1 span { display: block; margin-top: 8px; font-size: 30px; font-weight: 600; line-height: 1.45; letter-spacing: -.035em; }
.fx-hero-description { color: #465c78; font-size: 17px; line-height: 1.85; max-width: 450px; margin: 0 0 24px; }
.fx-hero-note { display: flex; align-items: center; gap: 12px; color: var(--muted); margin: 17px 0 10px; font-size: 14px; }
.fx-hero-note span { color: #71859f; }
.fx-brand-image { display: block; width: 100%; }
.fx-hero-media .media-zoom, .fx-products-media .media-zoom { display: block; width: 100%; border-radius: 6px; overflow: hidden; border: 1px solid #d2ddeb; background: #e8edf5; padding: 0; }
.fx-brand-image img, .fx-hero-media img, .fx-products-media img { display: block; width: 100%; height: auto; object-fit: contain; }
.fx-heading { display: flex; justify-content: space-between; align-items: end; gap: 32px; margin-bottom: 26px; }
.fx-heading h2 { margin: 0; }
.fx-heading > p { color: var(--muted); font-size: 16px; line-height: 1.8; margin: 0 0 3px; }
.fx-lines-grid { display: grid; grid-template-columns: 1.07fr 1fr; align-items: center; gap: 44px; }
.fx-line-item { display: flex; gap: 18px; padding: 20px 0; border-bottom: 1px solid var(--line); }
.fx-line-item:first-child { padding-top: 0; }
.fx-line-item h3 { font-size: 21px; font-weight: 650; margin: 0 0 7px; }
.fx-line-item p { font-size: 16px; color: var(--muted); line-height: 1.8; margin: 0; }
.fx-line-mark { width: 44px; height: 44px; flex: 0 0 44px; background: #edf4ff; color: var(--accent); display: grid; place-items: center; border-radius: 6px; font-size: 19px; font-weight: 700; }
.fx-line-list > .fx-text-link { margin-top: 20px; }
.fx-protocols { background: #f5f8fc; border-block: 1px solid #e5ecf4; }
.fx-protocol-table { border-top: 2px solid var(--accent); background: #fff; }
.fx-protocol-row { display: grid; grid-template-columns: .78fr 1.2fr 1.25fr; border-bottom: 1px solid var(--line); }
.fx-protocol-row > div { padding: 21px 24px; min-width: 0; }
.fx-protocol-row > div + div { border-left: 1px solid #e7edf5; }
.fx-protocol-head { background: #eaf0f9; font-size: 14px; font-weight: 600; color: #405875; }
.fx-protocol-head > div { padding-block: 12px; }
.fx-protocol-row h3 { color: var(--accent-dark); font-size: 22px; margin: 0 0 6px; }
.fx-protocol-row strong { font-size: 16px; line-height: 1.7; font-weight: 600; }
.fx-protocol-row p { font-size: 16px; line-height: 1.8; color: var(--muted); margin: 4px 0 0; }
.fx-protocol-bottom { display: flex; align-items: baseline; justify-content: space-between; gap: 24px; margin-top: 18px; }
.fx-protocol-bottom > p { color: var(--muted); font-size: 14px; line-height: 1.8; margin: 0; }
.fx-protocol-bottom .fx-text-link { flex-shrink: 0; }
.fx-start-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 64px; }
.fx-start-intro h2, .fx-faq-intro h2 { margin: 0 0 16px; }
.fx-start-intro > p:not(.eyebrow) { color: var(--muted); font-size: 16px; line-height: 1.85; margin: 0 0 20px; max-width: 440px; }
.fx-step-list { margin: 0; padding: 0; list-style: none; }
.fx-step-list li { display: flex; align-items: flex-start; gap: 18px; position: relative; padding: 0 0 25px; }
.fx-step-list li:last-child { padding-bottom: 0; }
.fx-step-list li:not(:last-child)::after { content: ""; position: absolute; width: 1px; background: #d8e3f3; left: 18px; top: 38px; bottom: 0; }
.fx-step-number { background: #eaf2ff; color: var(--accent); display: grid; place-items: center; flex: 0 0 37px; height: 37px; border-radius: 50%; font-size: 16px; font-weight: 700; }
.fx-step-list h3 { font-size: 18px; line-height: 1.6; margin: 2px 0 5px; }
.fx-step-list p { color: var(--muted); font-size: 16px; line-height: 1.8; margin: 0; }
.fx-faq { border-top: 1px solid var(--line); }
.fx-faq-grid { display: grid; grid-template-columns: .66fr 1.34fr; gap: 60px; }
.fx-faq-intro > p:not(.eyebrow) { margin: 0 0 20px; font-size: 16px; color: var(--muted); line-height: 1.8; }
.fx-faq .faq-list { display: block; margin: 0; }
.fx-faq .faq-item { background: transparent; border: 0; border-bottom: 1px solid var(--line); border-radius: 0; padding: 19px 0; box-shadow: none; }
.fx-faq .faq-item:first-child { padding-top: 0; }
.fx-faq .faq-item h3 { margin: 0 0 8px; color: var(--ink); font-size: 18px; line-height: 1.6; }
.fx-faq .faq-item p { color: var(--muted); font-size: 16px; line-height: 1.85; margin: 0; }
.fx-final { background: #eaf2ff; padding-block: 30px; border-top: 1px solid #d8e5f9; }
.fx-final-inner { display: flex; align-items: center; justify-content: space-between; gap: 30px; }
.fx-final h2 { font-size: 25px; margin: 0 0 8px; }
.fx-final p { color: var(--muted); font-size: 16px; line-height: 1.8; margin: 0; }

/* Prices remain grouped into three line categories, with two protocol tables. */
.page-intro { background: #edf4fc; border-bottom: 1px solid var(--line); padding-block: 30px; }
.page-intro h1 { color: #102b51; font-size: 35px; }
.page-intro p { max-width: 780px; font-size: 16px; }
.breadcrumb { font-size: 14px; }
.page-body { padding-block: 36px 46px; }
.fx-line-tabs { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); border-block: 1px solid var(--line); margin: 0 0 26px; }
.fx-line-tabs a { display: flex; align-items: center; justify-content: space-between; padding: 18px 20px; color: var(--ink); font-size: 20px; font-weight: 650; }
.fx-line-tabs a + a { border-left: 1px solid var(--line); }
.fx-line-tabs span { font-size: 14px; color: var(--accent-dark); font-weight: 400; }
.fx-price-note { font-size: 16px; }
.fx-price-note strong { display: block; margin-bottom: 6px; }
.fx-line-section { padding-top: 18px; margin-bottom: 38px; scroll-margin-top: 96px; }
.fx-line-section-head { border-bottom: 2px solid var(--accent); padding-bottom: 16px; }
.fx-line-section-head h2 { margin: 0 0 9px; }
.fx-line-section-head p:last-child { color: var(--muted); margin: 0; max-width: 820px; }
.fx-line-tables { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 28px; padding-top: 20px; }
.fx-line-table { font-size: 16px; }
.fx-line-table td:first-child { width: 20%; min-width: 0; }
.fx-line-table td, .fx-line-table th { padding: 14px 9px; }
.fx-line-table th { background: #eaf1fb; color: #294b76; font-size: 14px; }
.fx-line-table td { border-color: var(--line); }
.fx-line-table caption { font-size: 16px; }
.fx-line-table .price-number { font-size: 23px; }
.fx-line-table .price-unit { font-size: 14px; white-space: normal; }
.fx-line-table .button { padding: 10px; font-size: 14px; white-space: nowrap; }
.fx-line-check { margin-top: 14px; font-size: 14px; color: var(--muted); }
.fx-selection-end { border-top: 1px solid var(--line); padding-top: 26px; }
.fx-selection-end h2 { font-size: 25px; }
.fx-selection-end ol { color: var(--muted); margin-bottom: 24px; }

/* A keeps the sequential article and desktop reading directory. */
.tutorial-layout { grid-template-columns: 240px minmax(0,1fr); gap: 36px; }
.fx-tutorial-content { max-width: 840px; font-size: 17px; line-height: 1.85; }
.fx-tutorial-content section { margin-bottom: 38px; }
.fx-tutorial-content .eyebrow { margin-bottom: 8px; }
.fx-tutorial-content figure { margin: 22px 0 0; }
.fx-tutorial-content h2 { font-size: 25px; border-bottom-color: var(--line); }
.fx-tutorial-content .tutorial-preparation { font-size: 17px; }
.fx-tutorial-content .tutorial-preparation h2 { font-size: 23px; }
.fx-tutorial-content .tutorial-end { padding: 22px 0 0; border: 0; border-top: 1px solid var(--line); border-radius: 0; background: transparent; }
.fx-tutorial-content .completion-check { border: 0; border-left: 3px solid var(--accent); border-radius: 0; }
.fx-tutorial-step { padding-top: 6px; }
.fx-toc { background: #f3f7fc; border-color: var(--line); border-radius: 6px; font-size: 14px; top: 98px; }
.fx-toc a { color: #385879; }
.fx-toc > a { display: block; margin-top: 16px; }
.fx-tutorial-faq h3 { scroll-margin-top: 98px; }
.fx-related .related-links { gap: 8px 24px; font-size: 15px; }

.site-footer.fx-site-footer { background: #f7f9fc; color: #445b76; border-top: 1px solid var(--line); padding-top: 36px; }
.fx-site-footer .footer-grid { gap: 32px; padding-bottom: 26px; }
.fx-site-footer h2 { color: var(--ink); font-size: 15px; }
.fx-site-footer .footer-grid p, .fx-site-footer .footer-grid li { font-size: 14px; line-height: 1.8; }
.fx-site-footer a:hover { color: var(--accent); }
.fx-site-footer .footer-bottom { padding-bottom: 32px; }
.fx-site-footer .footer-bottom > p:first-child, .fx-site-footer .footer-filings, .fx-site-footer .copyright { font-size: 14px; }
.fx-site-footer .copyright { text-align: center; margin-bottom: 0; }

@media (max-width: 1100px) {
  .fx-line-tables { grid-template-columns: 1fr; }
  .fx-line-table td:first-child { width: 28%; }
  .fx-start-grid { gap: 40px; }
  .fx-faq-grid { gap: 34px; grid-template-columns: .8fr 1.2fr; }
  .fx-final .fx-actions { flex-shrink: 0; flex-direction: column; align-items: stretch; }
}
@media (max-width: 1000px) {
  .fx-hero-grid { gap: 28px; grid-template-columns: .94fr 1.06fr; }
  .fx-hero h1 { font-size: 40px; }
  .fx-hero h1 span { font-size: 27px; }
  .fx-lines-grid { gap: 28px; }
  .fx-line-item { gap: 14px; padding-block: 16px; }
  .fx-line-item h3 { font-size: 19px; }
  .fx-protocol-row > div { padding-inline: 18px; }
  .fx-line-tabs a { padding: 17px 14px; font-size: 18px; }
}
@media (max-width: 860px) {
  .fx-site-header .header-inner { min-height: 64px; gap: 8px; }
  .fx-site-header .header-register { margin-left: auto; }
  .fx-site-header .header-inner > nav { margin-left: 0; }
  html.js .fx-site-header .header-inner > nav { display: none; }
  html.js body.menu-open .fx-site-header .header-inner > nav { display: block; }
  .fx-site-header .nav-list { gap: 0; border-top: 1px solid var(--line); padding: 4px 0 10px; }
  .fx-site-header .nav-list a { padding: 10px 14px; }
  .fx-line-tabs a { display: block; font-size: 17px; }
  .fx-line-tabs span { display: block; margin-top: 4px; }
  .tutorial-layout { display: block; }
  .fx-tutorial-content { margin-inline: auto; }
}
@media (max-width: 760px) {
  h2 { font-size: 25px; }
  .section { padding-block: 30px; }
  .fx-hero-grid { grid-template-columns: 1fr; gap: 24px; padding-block: 28px; }
  .fx-hero h1 { font-size: 32px; margin: 9px 0 15px; }
  .fx-hero h1 span { font-size: 25px; margin-top: 5px; letter-spacing: -.025em; }
  .fx-hero-description { font-size: 16px; line-height: 1.8; max-width: none; margin-bottom: 20px; }
  .fx-actions { gap: 10px; }
  .fx-actions .button { font-size: 14px; padding-inline: 17px; }
  .fx-hero-note { margin: 15px 0 9px; gap: 10px; }
  .fx-heading { display: block; margin-bottom: 22px; }
  .fx-heading > p { margin-top: 10px; }
  .fx-desktop-break { display: none; }
  .fx-lines-grid { grid-template-columns: 1fr; gap: 24px; }
  .fx-line-item { padding-block: 17px; gap: 14px; }
  .fx-line-item h3 { margin-bottom: 5px; }
  .fx-line-list > .fx-text-link { margin-top: 17px; }
  .fx-protocol-row { grid-template-columns: 1fr; padding: 20px; gap: 13px; }
  .fx-protocol-head { display: none; }
  .fx-protocol-row > div { padding: 0; }
  .fx-protocol-row > div + div { border: 0; }
  .fx-protocol-bottom { display: block; margin-top: 16px; }
  .fx-protocol-bottom .fx-text-link { margin-top: 11px; }
  .fx-start-grid { grid-template-columns: 1fr; gap: 26px; }
  .fx-start-intro > p:not(.eyebrow) { margin-bottom: 15px; }
  .fx-start-intro h2, .fx-faq-intro h2 { margin-bottom: 13px; }
  .fx-step-list li { padding-bottom: 22px; gap: 14px; }
  .fx-faq-grid { grid-template-columns: 1fr; gap: 24px; }
  .fx-faq-intro > p:not(.eyebrow) { margin-bottom: 13px; }
  .fx-faq .faq-item { padding-block: 18px; }
  .fx-faq .faq-item h3 { font-size: 17px; }
  .fx-final { padding-block: 28px; }
  .fx-final-inner { display: block; }
  .fx-final h2 { font-size: 23px; }
  .fx-final .fx-actions { flex-direction: row; margin-top: 19px; }
  .page-intro { padding-block: 25px 28px; }
  .page-intro h1 { font-size: 29px; }
  .page-body { padding-block: 28px 32px; }
  .fx-tutorial-content h2 { font-size: 23px; }
  .fx-tutorial-content section { margin-bottom: 30px; }
  .fx-site-footer .footer-bottom { padding-bottom: calc(82px + env(safe-area-inset-bottom, 0px)); }
}
@media (max-width: 600px) {
  .fx-line-tabs a { font-size: 16px; padding: 13px 9px; }
  .fx-line-tabs span { font-size: 14px; }
  .fx-line-tables { gap: 26px; }
  .fx-line-table caption { padding-bottom: 10px; font-size: 16px; }
  .fx-line-table tr { display: grid; grid-template-columns: 1fr 1fr; gap: 4px 18px; border: 0; border-top: 1px solid var(--line); border-radius: 0; padding: 15px 0; margin: 0; }
  .fx-line-table td { padding: 0; font-size: 16px; border: 0; }
  .fx-line-table td::before { font-size: 14px; }
  .fx-line-table td:first-child { grid-column: 1; grid-row: 1; padding: 0; margin: 0; border: 0; font-size: 18px; }
  .fx-line-table td:nth-child(2) { grid-column: 1; grid-row: 2; justify-content: flex-start; gap: 10px; }
  .fx-line-table td:nth-child(3) { grid-column: 2; grid-row: 1 / 3; display: flex; flex-direction: column; align-items: flex-end; gap: 0; padding-right: 56px; }
  .fx-line-table td:nth-child(3)::before { content: none; }
  .fx-line-table .price-number { font-size: 24px; }
  .fx-line-table .price-unit { display: block; font-size: 14px; line-height: 1.7; }
  .fx-line-table td:last-child { grid-column: 1 / -1; padding-top: 8px; }
  .fx-line-table td:last-child .button { width: calc(100% - 56px); min-height: 44px; font-size: 14px; }
  .fx-line-section { padding-top: 10px; margin-bottom: 28px; }
  .fx-line-check { margin-bottom: 0; }
  .fx-selection-end h2 { font-size: 23px; }
  .fx-price-note { font-size: 16px; }
  .fx-tutorial-content .tutorial-preparation { overflow-wrap: anywhere; }
  .fx-register-address { max-width: calc(100% - 48px); overflow-wrap: anywhere; }
  .fx-tutorial-content figcaption { padding-right: 56px; }
  .fx-tutorial-content .tutorial-preparation h2 { font-size: 22px; }
  .fx-site-footer .footer-grid { gap: 24px 20px; }
  .fx-site-footer .footer-grid p { max-width: 100%; }
}
@media (prefers-reduced-motion: reduce) {
  .button { transition: none; }
}

/* Complete-site pages extend the approved line-first layout. */
.fx-site-header .nav-list { gap: 22px; }
.fx-site-header .header-inner { gap: 22px; }
.page-intro h1 { font-size: 32px; }
.page-intro h1,.fx-selection-line h2,.fx-faq-page h2 { text-wrap: balance; }
.fx-selection-line { display: flex; gap: 22px; padding-block: 26px; border-bottom: 1px solid var(--line); scroll-margin-top: 100px; }
.fx-selection-line:first-of-type { padding-top: 8px; }
.fx-selection-line > div:last-child { min-width: 0; max-width: 850px; }
.fx-selection-line h2 { margin-bottom: 10px; font-size: 25px; }
.fx-selection-line p { margin-bottom: 13px; color: var(--muted); font-size: 16px; }
.fx-selection-specs { line-height: 1.95; }
.fx-selection-protocols { padding-block: 34px; }
.fx-selection-columns { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 38px; }
.fx-selection-columns h3 { font-size: 21px; }
.fx-selection-columns p { color: var(--muted); margin-bottom: 14px; }
.fx-selection-product { display: grid; grid-template-columns: .95fr 1.05fr; gap: 38px; align-items: center; margin-bottom: 34px; }
.fx-selection-product h2 { font-size: 25px; }
.fx-selection-product p { color: var(--muted); }
.fx-price-unit { color: var(--muted); margin-bottom: 16px; font-size: 16px; }
.fx-price-filter { margin: 0 0 12px; padding: 15px 18px; }
.fx-price-filter label { font-size: 14px; }
.fx-pricing .result-count { margin: 12px 0 8px; }
.fx-pricing .fx-line-section { margin-bottom: 30px; padding-top: 14px; }
.fx-pricing .fx-line-section-head { padding-bottom: 12px; }
.fx-pricing .fx-line-section-head h2 { font-size: 25px; }
.fx-pricing .fx-line-tables { padding-top: 16px; }
.fx-quote-group { min-width: 0; }
.fx-price-explanation p { max-width: 900px; color: var(--muted); }
/* Help A: a protocol/device directory and one clear link per article. */
.page-help .page-intro { padding-block: 24px; }
.page-help .page-intro .container,.page-help .fx-help { max-width: 1100px; }
.page-help .page-intro .breadcrumb { margin-bottom: 12px; }
.page-help .page-intro .eyebrow { margin-bottom: 5px; }
.page-help .page-intro h1 { font-size: 32px; margin-bottom: 9px; }
.page-help .page-intro p { font-size: 16px; line-height: 1.7; }
.page-help .fx-help { padding-block: 28px 46px; }
.page-help .fx-help-filter { grid-template-columns: minmax(0,1fr) 230px 78px; gap: 18px; margin: 0 0 27px; padding: 0 0 23px; background: none; border: 0; border-bottom: 1px solid var(--line); border-radius: 0; }
.page-help .fx-help-filter label { font-size: 14px; line-height: 1.5; }
.page-help .fx-help-filter input,.page-help .fx-help-filter select { font-size: 16px; min-height: 44px; }
.page-help .fx-help-filter > button { grid-column: auto; min-height: 44px; padding: 8px 14px; font-size: 16px; }
.page-help .fx-help-layout { display: grid; grid-template-columns: 200px minmax(0,1fr); gap: 38px; align-items: start; }
.page-help .fx-help-rail { position: sticky; top: 100px; min-width: 0; padding-right: 21px; border-right: 1px solid var(--line); }
.page-help .fx-help-rail > h2 { margin: 0 0 10px; font-size: 16px; font-weight: 600; }
.page-help .fx-help-navigation { display: flex; flex-direction: column; gap: 2px; }
.page-help .fx-help-navigation a { display: flex; align-items: center; min-height: 44px; padding-block: 9px; color: #435a76; font-size: 15px; line-height: 1.5; }
.page-help .fx-help-navigation a:hover { color: var(--accent-dark); }
.page-help .fx-help-main { min-width: 0; }
.page-help .fx-help-main > .result-count { margin: 0 0 17px; font-size: 14px; }
.page-help .fx-help-group { margin: 0 0 34px; scroll-margin-top: 100px; }
.page-help .fx-help-group > h2 { display: flex; align-items: baseline; justify-content: space-between; gap: 14px; margin: 0; padding: 0 0 12px; border-bottom: 1px solid #b9cce4; font-size: 22px; line-height: 1.45; }
.page-help .fx-help-group > h2 > span { flex-shrink: 0; font-size: 14px; font-weight: 400; color: var(--muted); }
.page-help .fx-help-group-intro { color: var(--muted); font-size: 15px; line-height: 1.7; margin: 12px 0 0; }
.page-help .fx-help-row { margin: 0; border-bottom: 1px solid var(--line); }
.page-help .fx-help-link { display: block; min-height: 44px; padding-block: 18px; color: var(--ink); }
.page-help .fx-help-link:hover { text-decoration: none; }
.page-help .fx-help-link:hover h3 { color: var(--accent-dark); text-decoration: underline; }
.page-help .fx-help-link h3 { margin: 0 0 7px; color: var(--ink); font-size: 18px; font-weight: 600; line-height: 1.55; overflow-wrap: anywhere; text-wrap: initial; }
.page-help .fx-help-link p { display: -webkit-box; -webkit-box-orient: vertical; -webkit-line-clamp: 2; overflow: hidden; margin: 0; color: #5a6c82; font-size: 15.5px; line-height: 1.75; overflow-wrap: anywhere; }
.page-help .fx-help-main > .empty-state { padding: 24px 18px; font-size: 16px; line-height: 1.75; }
.page-help .fx-help-contact { padding-top: 8px; }
.page-help .fx-help-contact h2 { font-size: 22px; margin-bottom: 12px; }
.page-help .fx-help-contact p { font-size: 16px; line-height: 1.75; color: var(--muted); }
.page-help .fx-help-contact > .button { min-height: 44px; }

@media (max-width: 360px) {
  .page-help .fx-site-header .header-inner { column-gap: 6px; row-gap: 0; flex-wrap: wrap; }
  .page-help .fx-site-header .brand-lockup { gap: 5px; font-size: 15px; flex: 0 0 auto; }
  .page-help .fx-site-header .brand-lockup img { width: 28px; height: 28px; }
  .page-help .fx-site-header .header-register { font-size: 14px; padding: 8px 9px; min-height: 44px; white-space: nowrap; }
  .page-help .fx-site-header .menu-toggle { padding: 8px; min-width: 44px; min-height: 44px; font-size: 14px; margin: 0; }
  .page-help .fx-site-header .header-inner > nav { margin-left: 0; }
  .page-help .fx-help-link h3 { text-wrap: balance; }
}

/* Usage articles keep A's protocol/device directory and a quiet reading column. */
.fx-guide-layout { display: grid; grid-template-columns: 222px minmax(0,1fr); grid-template-areas: "directory heading" "directory article"; column-gap: 44px; row-gap: 0; align-items: start; padding-block: 34px 48px; }
.fx-guide-directory { grid-area: directory; position: sticky; top: 102px; font-size: 15px; line-height: 1.8; padding-right: 20px; border-right: 1px solid var(--line); }
.fx-guide-directory h2 { margin: 20px 0 6px; font-size: 17px; }
.fx-guide-directory ol { padding-left: 20px; margin: 0 0 18px; }
.fx-guide-directory a { display: inline-flex; align-items: center; min-height: 44px; color: var(--accent-dark); }
.fx-guide-directory li { padding-block: 2px; }
.fx-guide-heading { grid-area: heading; min-width: 0; max-width: 850px; font-size: 17px; line-height: 1.9; }
.fx-guide-article { grid-area: article; min-width: 0; max-width: 850px; font-size: 17px; line-height: 1.9; }
.fx-guide-heading h1 { color: var(--ink); font-size: 33px; line-height: 1.45; margin: 11px 0 16px; text-wrap: balance; }
.fx-guide-heading p,.fx-guide-article p { margin: 0 0 17px; overflow-wrap: anywhere; }
.fx-guide-heading .breadcrumb { margin-bottom: 24px; font-size: 14px; }
.fx-guide-heading .breadcrumb a { min-height: 32px; }
.fx-guide-lead { color: #465c78; }
.fx-guide-prepare { margin: 25px 0 32px; padding: 20px 0 18px; border-block: 1px solid var(--line); }
.fx-guide-prepare h2,.fx-guide-check h2,.fx-guide-related h2 { font-size: 23px; margin: 0 0 12px; }
.fx-guide-prepare > p:last-child { margin-bottom: 0; }
.fx-guide-register { display: flex; flex-direction: column; gap: 6px; }
.fx-guide-register strong,.fx-guide-register span { font-size: 16px; }
.fx-guide-register a { min-height: 44px; overflow-wrap: anywhere; font-size: 16px; }
.fx-guide-part { margin: 0 0 36px; scroll-margin-top: 104px; }
.fx-guide-part h2 { display: flex; align-items: baseline; gap: 12px; margin-bottom: 17px; font-size: 25px; line-height: 1.5; }
.fx-guide-part h2 > span { flex: 0 0 auto; color: var(--accent); font-size: 16px; font-weight: 500; }
.fx-guide-article ol { padding-left: 26px; }
.fx-guide-article li { margin-bottom: 11px; padding-left: 3px; }
.fx-guide-article li::marker { color: var(--accent-dark); font-weight: 600; }
.fx-guide-figure { margin: 22px 0 20px; }
.fx-guide-figure .media-zoom { display: block; background: #f6f8fb; border: 1px solid var(--line); border-radius: 4px; }
.fx-guide-figure img { display: block; width: 100%; height: auto; object-fit: contain; }
.fx-guide-figure figcaption { margin-top: 10px; color: var(--muted); font-size: 16px; line-height: 1.8; }
.fx-guide-check { padding-top: 24px; border-top: 2px solid var(--accent); margin: 30px 0; scroll-margin-top: 104px; }
.fx-guide-related { border-top: 1px solid var(--line); padding-top: 24px; }
.fx-guide-related ul { padding: 0; list-style: none; margin: 0 0 18px; }
.fx-guide-related li { margin: 0; padding: 0; }
.fx-guide-related li a { display: inline-flex; align-items: center; min-height: 44px; padding-block: 7px; color: var(--accent-dark); }
.fx-guide-source { font-size: 15px; color: var(--muted); border-top: 1px solid var(--line); padding-top: 16px; margin-top: 24px; }
.fx-guide-source a { min-height: 44px; display: inline-flex; align-items: center; }
.fx-faq-page { max-width: 1000px; }
.fx-faq-page .faq-item { padding-block: 24px; }
.fx-faq-page h2 { font-size: 21px; margin-bottom: 12px; }
.fx-faq-page .faq-item p { font-size: 16px; overflow-wrap: anywhere; }
.fx-faq-page > .fx-actions { margin-top: 26px; }
.fx-map { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 34px; }
.fx-map h2 { font-size: 23px; padding-bottom: 12px; border-bottom: 2px solid var(--accent); }
.fx-map section > a { display: flex; flex-direction: column; justify-content: center; min-height: 54px; padding-block: 12px; border-bottom: 1px solid var(--line); }
.fx-map strong { font-size: 17px; }
.fx-map span { color: var(--muted); font-size: 15px; }
.fx-error { min-height: 280px; }
.fx-error > p { margin-top: 26px; }
.fx-site-footer .footer-bottom > p { text-align: center; }
.support-tools button { width: 44px; height: 44px; }

@media (max-width: 1100px) and (min-width: 861px) {
  .fx-site-header .header-inner { gap: 13px; }
  .fx-site-header .brand-lockup { font-size: 18px; gap: 6px; }
  .fx-site-header .brand-lockup img { width: 42px; height: 42px; }
  .fx-site-header .nav-list { gap: 13px; }
  .fx-site-header .nav-list a { font-size: 14px; }
  .fx-site-header .header-register { padding-inline: 12px; }
}
@media (max-width: 860px) {
  .fx-site-header .nav-list { gap: 0; }
  .fx-line-section-head > p,.fx-tutorial-content .tutorial-preparation > p:not(.fx-register-address) { padding-right: 54px; }
  .fx-price-explanation p,.fx-selection-end li { padding-right: 54px; }
  .fx-guide-layout { display: block; padding-top: 24px; }
  .fx-guide-directory { position: static; border-right: 0; border-bottom: 1px solid var(--line); padding: 0 54px 16px 0; margin-bottom: 26px; }
  .fx-guide-directory h2 { margin-top: 10px; }
  .fx-guide-directory ol { margin-bottom: 8px; }
  .fx-guide-directory li { padding-block: 0; }
  .fx-guide-heading,.fx-guide-article { padding-right: 54px; font-size: 16px; line-height: 1.9; }
  .fx-guide-heading h1 { font-size: 29px; }
  .fx-guide-part h2 { font-size: 23px; gap: 9px; }
  .fx-guide-prepare h2,.fx-guide-check h2,.fx-guide-related h2 { font-size: 22px; }
  .fx-guide-heading .breadcrumb { margin-bottom: 18px; }
  .fx-guide-part { margin-bottom: 29px; }
  .fx-guide-figure figcaption { font-size: 16px; }
  .fx-map { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 760px) {
  .page-intro h1 { font-size: 28px; }
  .fx-hero h1 { font-size: 30px; }
  .fx-selection-line { gap: 14px; padding-block: 22px; }
  .fx-selection-line .fx-line-mark { width: 38px; height: 38px; flex-basis: 38px; font-size: 17px; }
  .fx-selection-line h2,.fx-selection-product h2 { font-size: 23px; }
  .fx-selection-columns,.fx-selection-product { grid-template-columns: 1fr; gap: 26px; }
  .fx-selection-protocols { padding-block: 28px; }
  .fx-selection-product { margin-bottom: 28px; }
  .fx-faq-page h2 { font-size: 20px; }
}
@media (max-width: 600px) {
  .fx-pricing .fx-line-section-head h2 { font-size: 23px; }
  .fx-line-table td:nth-child(3) { width: auto!important; }
  .fx-line-table td:nth-child(2) { padding-right: 8px; }
  .fx-price-filter { padding: 14px; }
  .fx-selection-line p,.fx-selection-columns p,.fx-selection-product p { padding-right: 48px; }
  .fx-faq-page .faq-item { padding-right: 54px; }
  .fx-tutorial-content .fx-tutorial-step > p,.fx-tutorial-content .fx-tutorial-step > ol,.fx-tutorial-content .fx-completion ul,.fx-tutorial-content .fx-tutorial-faq p { padding-right: 54px; }
  .fx-map { grid-template-columns: 1fr; gap: 28px; padding-right: 56px; }
  .fx-map h2 { font-size: 22px; }
  .fx-site-footer .footer-grid p,.fx-site-footer .footer-bottom > p,.fx-site-footer .footer-filings { padding-right: 50px; }
  .fx-site-footer .footer-filings { padding-left: 8px; }
  .fx-site-footer .copyright { padding-inline: 20px; }
}

@media (max-width: 1000px) {
  .page-help .fx-help-layout { display: block; }
  .page-help .fx-help-rail { position: static; padding: 0; margin: 0 0 21px; border: 0; }
  .page-help .fx-help-rail > h2 { display: none; }
  .page-help .fx-help-navigation { flex-direction: row; flex-wrap: nowrap; gap: 22px; overflow-x: auto; padding-bottom: 7px; border-bottom: 1px solid var(--line); }
  .page-help .fx-help-navigation a { flex: 0 0 auto; white-space: nowrap; }
  .page-help .fx-help-filter { grid-template-columns: minmax(0,1fr) minmax(160px,220px) 76px; gap: 14px; }
}
@media (max-width: 860px) {
  .page-help .page-intro .container,.page-help .fx-help { padding-right: 54px; }
}
@media (max-width: 600px) {
  .page-help .page-intro { padding-block: 20px; }
  .page-help .page-intro h1 { font-size: 28px; }
  .page-help .fx-help { padding-top: 22px; }
  .page-help .fx-help-filter { grid-template-columns: minmax(0,1fr) 76px; gap: 12px 10px; padding-bottom: 20px; margin-bottom: 16px; }
  .page-help .fx-help-filter label:first-child { grid-column: 1 / -1; }
  .page-help .fx-help-filter > button { grid-column: 2; width: 100%; }
  .page-help .fx-help-filter input,.page-help .fx-help-filter select { padding: 9px 10px; }
  .page-help .fx-help-navigation { gap: 18px; }
  .page-help .fx-help-navigation a { font-size: 15px; }
  .page-help .fx-help-main > .result-count { margin-bottom: 16px; }
  .page-help .fx-help-group { margin-bottom: 29px; }
  .page-help .fx-help-group > h2 { font-size: 21px; gap: 10px; }
  .page-help .fx-help-group-intro { font-size: 15px; }
  .page-help .fx-help-link { padding-block: 17px; }
  .page-help .fx-help-link h3 { font-size: 18px; }
  .page-help .fx-help-link p { -webkit-line-clamp: 3; font-size: 16px; line-height: 1.7; }
  .page-help .fx-help-contact h2 { font-size: 21px; }
}