:root{--navy:#142a43;--ink:#182f46;--muted:#617185;--teal:#087f82;--teal-soft:#e8f5f3;--bg:#f7f9fc;--line:#e5eaf0;--white:#fff;--sidebar:268px;--header:78px;--shadow:0 12px 40px #142a430b;font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--bg);font-synthesis:none}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:100px}body{margin:0;font-size:16px;line-height:1.7}button,input{font:inherit}a{color:var(--teal);text-decoration:none}a:hover{text-decoration:underline}button,a,input{touch-action:manipulation}button{cursor:pointer}button:disabled{cursor:default}button svg,a svg{flex-shrink:0}button{color:inherit}a,button,input,summary{outline-offset:4px}:focus-visible{outline:3px solid 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13px;min-height:45px;font-size:14px;border-radius:7px;margin-bottom:19px;color:#425a70}.home-link.active{background:var(--teal-soft);color:var(--teal);font-weight:650}.home-link:hover{text-decoration:none;background:#f2f7f8}.nav-group{margin:3px 0 10px}.nav-group summary{display:flex;align-items:center;gap:9px;cursor:pointer;min-height:44px;font-size:14px;font-weight:650;color:#344c63;padding:8px 12px;border-radius:6px;list-style:none}.nav-group summary::-webkit-details-marker{display:none}.nav-group summary:hover{background:#f6f8fa}.nav-group summary svg:last-child{width:15px;margin-left:auto;transition:transform .18s}.nav-group[open] summary svg:last-child{transform:rotate(90deg)}.nav-articles{padding:2px 0 3px 21px;margin-left:21px;border-left:1px solid var(--line)}.nav-articles a{display:block;padding:9px 10px;min-height:44px;line-height:1.65;font-size:13px;color:#637286;border-radius:5px;margin:1px 0}.nav-articles 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#dce3ea;background:#f7f9fb;color:#748394;display:grid;place-items:center;width:25px;height:26px;border-radius:5px;font-size:12px}.search-clear{border:0;background:none;min-width:44px;min-height:44px;color:#637286;margin-right:-12px}.hero-meta{display:flex;flex-wrap:wrap;gap:22px;margin-top:23px;font-size:11px;color:#adc0d1}.hero-meta span{display:flex;align-items:center;gap:7px}.hero-meta svg{width:14px;height:14px}.home-section{margin-top:35px}.section-heading{display:flex;align-items:flex-end;justify-content:space-between;gap:12px;margin-bottom:17px}.section-heading h2{font-size:20px;margin:0;font-weight:650}.section-heading p{margin:3px 0 0;font-size:13px;color:var(--muted)}.small-label{font-size:11px;letter-spacing:1px;color:#8293a3}.quick-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.quick-card{display:flex;align-items:center;gap:14px;background:#fff;border:1px solid var(--line);border-radius:9px;padding:19px;color:var(--ink);min-height:93px;transition:box-shadow .18s,border-color .18s,transform .18s}.quick-card:hover{text-decoration:none;border-color:#9accc8;box-shadow:var(--shadow);transform:translateY(-2px)}.quick-icon{background:var(--teal-soft);color:var(--teal);width:43px;height:43px;border-radius:10px;display:grid;place-content:center;flex-shrink:0}.quick-card strong{display:block;font-size:14px;font-weight:650;line-height:1.5}.quick-card small{display:block;color:var(--muted);font-size:11px;margin-top:4px}.quick-card>.arrow{margin-left:auto;width:15px;color:#92a3b2}.category-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.category-card{display:block;background:#fff;border:1px solid var(--line);padding:24px 23px 18px;border-radius:10px;transition:border-color .18s,box-shadow .18s;color:var(--ink)}.category-card:hover{text-decoration:none;border-color:#9accc8;box-shadow:var(--shadow)}.category-icon{background:#eef4f8;color:#436785;display:grid;place-content:center;height:43px;width:43px;border-radius:10px;margin-bottom:17px}.category-card:nth-child(3n+2) .category-icon{background:var(--teal-soft);color:var(--teal)}.category-card:nth-child(3n) .category-icon{background:#f3f0fa;color:#77619d}.category-card h3{font-size:16px;margin:0 0 7px;font-weight:650}.category-card p{font-size:12px;color:var(--muted);line-height:1.8;margin:0;min-height:44px}.category-card-footer{margin-top:20px;border-top:1px solid #f0f3f6;padding-top:13px;display:flex;align-items:center;justify-content:space-between;font-size:11px;color:#74899a}.category-card-footer svg{width:16px;height:16px}.info-strip{padding:22px 25px;background:#edf4f8;border-radius:10px;display:flex;align-items:flex-start;gap:13px;font-size:13px;margin-top:30px;color:#466079}.info-strip 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.18s}.zoom-label{position:absolute;bottom:12px;right:12px;display:flex;align-items:center;gap:5px;color:#fff;background:#142a43db;font-size:10px;border-radius:5px;padding:5px 9px}.zoom-label svg{height:14px;width:14px}.screenshot-button:hover img{filter:brightness(.97)}.screenshot figcaption{padding:11px 15px;color:#718597;font-size:11px;line-height:1.8}.success-list{list-style:none;padding:0!important;background:#edf7f3;border:1px solid #d9ede3;border-radius:8px;padding:15px 19px!important}.success-list li{display:flex;align-items:flex-start;gap:9px;color:#355f50;font-size:13px}.success-list svg{color:#298463;margin-top:4px;width:17px;height:17px;flex-shrink:0}.warning-box{background:#fff8e9;border:1px solid #f1e4bf;border-radius:8px;padding:16px 19px}.warning-box strong{font-size:13px;color:#8c6622;display:flex;align-items:center;gap:8px}.warning-box ul{margin-bottom:0;padding-left:20px}.warning-box li{font-size:13px;color:#796444}.faq{background:#fff;border:1px solid var(--line);border-radius:8px;margin:10px 0}.faq summary{cursor:pointer;padding:15px 18px;font-size:14px;font-weight:600;min-height:50px}.faq p{padding:0 18px 15px;margin:0;font-size:13px}.related-links{display:grid;gap:8px}.related-links a{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:13px 16px;border:1px solid var(--line);border-radius:7px;background:#fff;font-size:13px;min-height:46px}.sources-list{padding-left:20px!important}.sources-list a{overflow-wrap:anywhere;font-size:12px}.article-notice{font-size:11px!important;color:#7a8c9a!important}.toc{position:sticky;top:110px;align-self:start;padding-top:4px;font-size:12px}.toc-title{font-size:11px;font-weight:650;color:#354f65;margin:0 0 14px;padding-left:13px;letter-spacing:1px}.toc a{display:block;border-left:1px solid #dce4eb;padding:8px 0 8px 13px;color:#7a8c9d;font-size:11px;min-height:37px;line-height:1.8}.toc a:hover,.toc a.active{color:var(--teal);border-left:2px solid var(--teal);padding-left:12px;text-decoration:none}.toc-note{font-size:10px;color:#8394a2;line-height:1.8;margin-top:25px;padding:13px;background:#eef4f7;border-radius:6px}.article-pagination{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:38px;padding-top:23px;border-top:1px solid var(--line)}.article-pagination a{display:block;border:1px solid var(--line);border-radius:8px;padding:15px 17px;background:#fff;font-size:13px;color:#3e627a}.article-pagination a:last-child{text-align:right}.article-pagination small{font-size:10px;display:block;color:#8698a7;margin-bottom:6px}.article-pagination a:hover{border-color:#a3cccb;text-decoration:none}.icon-button{display:inline-flex;align-items:center;justify-content:center;border:0;background:transparent;color:var(--ink);height:44px;width:44px;border-radius:7px;flex-shrink:0}.icon-button:hover{background:#edf2f6}.mobile-menu{display:none}.drawer-overlay{display:none}.image-dialog{padding:0;width:min(96vw,1500px);max-width:96vw;max-height:94vh;border:1px solid #b5c1cd;border-radius:12px;color:var(--ink);background:#f0f4f7;box-shadow:0 20px 100px #0005}.image-dialog::backdrop{background:#0e213bdd;backdrop-filter:blur(4px)}.image-dialog-toolbar{display:flex;align-items:center;justify-content:space-between;padding:8px 14px;background:#fff;border-bottom:1px solid var(--line);gap:12px;position:sticky;top:0;z-index:1}.image-dialog-toolbar span{font-size:12px;overflow-wrap:anywhere}.image-dialog-body{overflow:auto;max-height:calc(90vh - 110px);padding:10px}.image-dialog-body img{display:block;max-width:100%;height:auto;margin:auto}.image-dialog-hint{font-size:11px;text-align:center;color:#647a8c;margin:10px}.toast{position:fixed;left:calc(50% + 100px);bottom:28px;transform:translate(-50%,20px);opacity:0;pointer-events:none;z-index:100;background:var(--navy);color:#fff;font-size:13px;padding:11px 21px;border-radius:8px;box-shadow:0 4px 20px #142a4333;transition:opacity .2s,transform .2s;max-width:calc(100% - 30px);text-align:center}.toast.show{opacity:1;transform:translate(-50%,0)}.noscript-message{margin:110px 25px 25px;padding:25px;background:#fff;border:1px solid var(--line)}.copy-dialog{width:min(550px,calc(100vw - 30px));padding:24px;border:1px solid var(--line);border-radius:10px;color:var(--ink)}.copy-dialog::backdrop{background:#102a43b3}.copy-dialog h2{font-size:18px;margin-top:0}.copy-dialog p{font-size:13px;color:var(--muted)}.copy-dialog input{width:100%;font-size:12px;padding:12px;border:1px solid #cbd8e3;border-radius:6px;margin-bottom:16px}.copy-dialog .secondary-button{float:right}.not-found{text-align:center;padding:70px 20px}.not-found h1{font-size:26px}.not-found p{color:var(--muted);font-size:14px}.not-found a{display:inline-flex;margin-top:15px}body.drawer-open{overflow:hidden}[hidden]{display:none!important}
.image-dialog-toolbar>span{min-width:0;flex:1}.image-dialog-controls{display:flex;align-items:center;gap:8px;flex-shrink:0}.image-dialog-controls .secondary-button{white-space:nowrap}.image-dialog.original-size .image-dialog-body img{max-width:none;width:auto;max-height:none;margin:0 auto}.image-dialog-body{overscroll-behavior:contain}
@media(min-width:1600px){#view{padding:44px 62px 55px}.hero{padding:49px 50px 40px}.category-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.article-layout{gap:48px;grid-template-columns:minmax(0,1fr) 190px}.article-section p,.article-section li{font-size:15px}}
@media(max-width:1199px){:root{--sidebar:242px}#view{padding:28px 30px 40px}.topbar{padding-right:28px}.hero{padding:32px}.quick-grid{gap:10px}.quick-card{padding:15px 12px;gap:10px}.quick-icon{height:36px;width:36px}.quick-card strong{font-size:12px}.quick-card small{font-size:10px}.category-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.article-layout{grid-template-columns:minmax(0,1fr)}.toc{display:none}.article-header h1{font-size:29px}.hero-copy{font-size:13px}.hero-meta{gap:15px}}
@media(max-width:860px){:root{--sidebar:258px;--header:70px}.topbar{padding:0 20px 0 10px;gap:8px}.mobile-menu{display:inline-flex}.brand{font-size:20px;gap:9px;margin-right:auto}.brand-mark{width:38px;height:38px;font-size:25px}.brand-sub{font-size:9px;letter-spacing:1.4px;margin-top:6px}.topbar-right{gap:13px}.external-link{font-size:12px}.edition{font-size:10px;padding:3px 7px}.sidebar{transform:translateX(-100%);transition:transform .2s;z-index:40;top:var(--header)}body.drawer-open .sidebar{transform:translateX(0)}.drawer-overlay{position:fixed;inset:var(--header) 0 0;background:#102a435e;z-index:35;display:block}main{margin-left:0}#view{padding:25px 30px 40px}.hero{padding:34px}.hero h1{font-size:30px}.quick-card strong{font-size:13px}.quick-card{padding:17px 14px}.toast{left:50%}.article-layout{max-width:840px;margin:auto}.article-header h1{font-size:30px}}
@media(max-width:560px){body{font-size:15px}.topbar{padding-right:12px}.topbar-right{gap:7px}.topbar-right .edition{display:none}.external-link{font-size:11px;gap:5px}.brand{font-size:18px}.brand-mark{width:34px;height:34px;font-size:23px;border-radius:9px}.brand-sub{font-size:8px;letter-spacing:1px}.brand-mark span{bottom:6px;font-size:23px}.icon-button.mobile-menu{width:38px}.hero{padding:28px 22px;border-radius:10px}.hero h1{font-size:27px}.hero-copy{font-size:12px;line-height:1.9;margin-bottom:21px}.eyebrow{font-size:9px;letter-spacing:1.5px;margin-bottom:12px}#view{padding:19px 17px 32px}.hero-meta{font-size:10px;gap:10px 16px;margin-top:18px}.hero-meta span:last-child{display:none}.search-box{min-height:54px;padding:0 12px;gap:9px}.search-box input{font-size:13px}.search-key{display:none}.quick-grid{grid-template-columns:1fr;gap:9px}.quick-card{min-height:76px;padding:14px 17px}.quick-card strong{font-size:14px}.quick-card small{font-size:11px}.quick-icon{width:39px;height:39px}.category-grid{gap:11px}.category-card{padding:18px 15px 13px;border-radius:8px}.category-card h3{font-size:14px}.category-card p{font-size:11px;line-height:1.9;min-height:63px}.category-icon{height:36px;width:36px;margin-bottom:13px;border-radius:8px}.category-card-footer{font-size:10px;margin-top:12px;padding-top:10px}.section-heading h2{font-size:18px}.section-heading p{font-size:12px}.small-label{font-size:9px}.home-section{margin-top:27px}.info-strip{padding:18px 16px;font-size:12px;gap:10px}.info-strip strong{font-size:13px}.page-footer{font-size:10px;margin-top:28px;line-height:1.8}.breadcrumb{font-size:11px;gap:6px;margin-bottom:21px}.category-intro h1{font-size:26px}.category-intro p{font-size:13px}.article-list-card{padding:19px 17px;gap:12px}.article-list-card h2{font-size:15px}.article-list-card p{font-size:12px}.list-meta{font-size:10px}.search-heading{align-items:flex-start;flex-direction:column;gap:7px}.search-heading h1{font-size:22px}.search-filters{gap:6px}.filter-button{font-size:11px;padding:8px 10px}.article-header h1{font-size:27px}.article-meta{font-size:10px}.article-summary{font-size:14px}.article-header{padding-bottom:23px;margin-bottom:25px}.article-section{margin:27px 0}.article-section h2{font-size:19px}.article-section h3{font-size:15px}.article-section p,.article-section li{font-size:13px}.steps>li{padding-left:42px}.field-table td,.field-table th{padding:12px;font-size:12px}.article-pagination a{font-size:12px;padding:13px}.faq summary{font-size:13px}.toc{display:none}.image-dialog{max-width:calc(100vw - 16px);width:calc(100vw - 16px)}.image-dialog-body img{max-width:100%;width:auto;height:auto}.image-dialog.original-size .image-dialog-body img{max-width:none;width:auto;max-height:none}.image-dialog-body{padding:0}.image-dialog-toolbar{gap:7px;padding:7px}.image-dialog-controls{gap:3px}.image-dialog-controls .secondary-button{font-size:11px;padding:8px}.image-dialog-controls .icon-button{width:40px}.image-dialog-toolbar span{font-size:11px}.zoom-label{bottom:8px;right:8px;font-size:9px}.route-box{font-size:12px}.screenshot figcaption{font-size:10px}.image-dialog-hint{font-size:10px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important;animation:none!important}.quick-card:hover{transform:none}}
@media print{:root{--header:0px;--sidebar:0px}body{background:#fff;color:#111;font-size:11pt}.topbar,.sidebar,.toc,.article-actions,.article-pagination,.breadcrumb,.page-footer,.toast,.drawer-overlay,.zoom-label,.image-dialog,.copy-dialog{display:none!important}main{padding:0;margin:0}#view{padding:0;max-width:none}.article-layout{display:block}.article-header{margin-bottom:20px;padding-bottom:15px}.article-header h1{font-size:25pt}.article-summary{font-size:11pt}.article-section{margin:20px 0;break-inside:auto}.article-section h2{font-size:16pt;break-after:avoid}.article-section h3{break-after:avoid}.article-section p,.article-section li{font-size:10pt}.screenshot{break-inside:avoid;max-width:100%;box-shadow:none}.screenshot img{max-height:600px;object-fit:contain}.screenshot-button{background:#fff}.steps>li{break-inside:avoid}.steps>li:before{border:1px solid #aaa;background:#fff}.field-table-wrap{overflow:visible}.field-table{font-size:10pt}.field-table tr{break-inside:avoid}details.faq{break-inside:avoid}details.faq>p{display:block!important}a{color:#111}.hero{background:#fff;color:#111;border:1px solid #aaa}.hero-copy,.hero-meta{color:#555}.search-form,.search-top,.search-filters{display:none!important}.category-grid,.quick-grid{grid-template-columns:repeat(2,1fr)}.category-card,.quick-card{break-inside:avoid;box-shadow:none}.article-notice{font-size:8pt!important}}
/* Practical examples follow their own steps, with a separate result check. */
.step-example{margin:18px 0;padding:16px 18px;border:1px solid #d5e6ed;border-left:3px solid var(--teal);border-radius:9px;background:#f0f7fa}.step-example>strong{display:block;margin-bottom:7px;color:#146779;font-size:13px}.steps .step-example p{margin:0;white-space:pre-wrap;overflow-wrap:anywhere;line-height:1.8}.step-expected{display:flex;align-items:flex-start;gap:10px;margin:16px 0 7px;padding:12px 15px;border-radius:8px;background:#eaf6ef;color:#285b48}.step-expected svg{width:18px;min-width:18px;height:18px;margin-top:4px;stroke:currentColor;fill:none;stroke-width:1.8}.steps .step-expected p{margin:0;color:inherit;font-size:13px;line-height:1.8}.step-expected strong{display:block;font-size:12px;letter-spacing:.03em;margin-bottom:3px}.steps li{min-width:0}.steps li .screenshot{margin:19px 0 12px}.steps>li+li{margin-top:30px}@media(max-width:600px){.step-example{padding:13px}.step-expected{padding:12px}.steps li .screenshot{margin-left:0;margin-right:0}}@media print{.step-example,.step-expected{break-inside:avoid;background:white;border:1px solid #bbb}.step-example{border-left:3px solid #555}}